Dave Jarvis' Repositories

Home Files Commits Tags Clone

Repository:

git clone https://repo.autonoma.ca/repo/keenwrite.git

A .gitattributes

 # always use LF line endings
 # ALL FILES:
 #   Normalize line endings to LF on checkin and
 #   prevent conversion to CRLF when the file is checked out.
 * text eol=lf
 # BINARY FILES:
 #   Disable line ending normalize on checkin.
 *.blend binary
 *.bin binary
 *.bmp binary
 *.eps binary
 *.exe binary
 *.gif binary
 *.ico binary
 *.jar binary
 *.jpg binary
 *.mng binary
 *.png binary
 *.zip binary
 *.otf binary
 *.ttf binary

A .github/ISSUE_TEMPLATE/bug_report.md

 ---
 name: Bug report
 about: Create a report to help us improve
 title: ''
 labels: bug
 assignees: ''
 ---
 **Description**
 A concise problem description.
 **Replicate**
 Exact and complete steps to reproduce the problem 100% of the time:
 . Open '...'
 . Click '....'
 . Click '....'
 **Expected**
 Describe the expected behaviour.
 **Actual**
 Describe the actual behaviour.
 **Screenshots**
 Add screenshots to show the problem, if applicable.
 **Environment**
  - Operating System: (Windows, Linux, Mac)
  - Application: e.g., 1.7.16
 **Details**
 Add additional information, if applicable.

A .gitignore

 dist
 *.bin
 *.exe
 /*.jar
 build
 .gradle
 video
 .settings
 .classpath
 .idea
 themes
 quotes
 tex
 spell
 keenwrite.github.io
 keenwrite.build_artifacts.txt
 todo

A BUILD.md

 # Introduction
 This document describes how to build the application and platform binaries.
 # Requirements
 Download and install the following software packages:
 * [JDK 19](https://bell-sw.com/pages/downloads) (Full JDK + JavaFX)
 * [Gradle 7.6-rc-1](https://services.gradle.org/distributions/gradle-7.6-rc-1-bin.zip)
 * [Git 2.38.1](https://git-scm.com/downloads)
 * [warp v0.4.0-alpha](https://github.com/Reisz/warp/releases/tag/v0.4.0)
 Note: The forked warp packer release fixes a bug in the main branch.
 ## Repository
 Clone the repository as follows:
     git clone https://github.com/DaveJarvis/keenwrite.git
 The repository is cloned.
 # Build
 Build the application überjar as follows:
     cd keenwrite
     gradle clean jar
 The application is built.
 # Run
 After the application is compiled, run it using `keenwrite.sh`.
 # Integrated development environments
 This section describes setup instructions to import and run the application
 using an integrated development environment (IDE). Running the application
 should trigger a build.
 ## IntelliJ IDEA
 This section describes how to build and run the application using
 IntellIJ's IDEA.
 ### Import
 Complete the following steps to import the application:
 . Start the IDE.
 . Click **File → New → Project from Existing Sources**.
 . Browse to the directory containing `keenwrite`.
 . Click **OK**.
 . Select **Gradle** as the external model.
 . Click **Finish**.
 The project is imported into the IDE.
 ### Run
 Run the application within the IDE as follows:
 . Open **Launcher.java**.
 . Click **Run → Launcher**.
 The application is started.
 # Installers
 This section describes how to set up the development environment and build
 native executables for supported operating systems.
 ## Setup
 Follow these one-time setup instructions to begin:
 . Ensure `$HOME/bin` is set in the `PATH` environment variable.
 . Copy `build-template` into `$HOME/bin`.
 Setup is complete.
 ## Binaries
 Run the `installer` script to build platform-specific binaries, such as:
     ./installer -V -o linux
 The `installer` script:
 * downloads a JDK;
 * generates a run script;
 * bundles the JDK, run script, and JAR file; and
 * creates a standalone binary, so no installation required.
 Run `./installer -h` to see all command-line options.
 # Releases
 After installing `scripts/build-template`, build release binaries as follows:
     git tag -a 2.0.0 -m "Release name"
     git push origin --tags
     ./release.sh
 When finished, browse to the project releases page to draft a new release.
 # Versioning
 Version numbers are read directly from Git using a plugin. The version
 number is written to `app.properties` in the `resources` directory. The
 application reads that file to display version information upon start.

A LICENSE.md

 # License
 Copyright 2020 White Magic Software, Ltd.
 Copyright 2015 Karl Tauber
 All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A R/bootstrap.R

 setwd( v$application$r$working$directory )
 # To reference additional R variables in documents, define them such as:
 # assign( "variable", v$key$name, envir = .GlobalEnv )
 source( "pluralize.R" )
 source( "possessive.R" )
 source( "conversion.R" )
 source( "csv.R" )

A R/conversion.R

 # -----------------------------------------------------------------------------
 # Copyright 2020, White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be
 # included in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # Substitute R expressions in a document with their evaluated value. The
 # anchor variable must be set for functions that use relative dates.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # Evaluates an expression; writes s if there is no expression.
 # -----------------------------------------------------------------------------
 x <- function( s ) {
   tryCatch( {
     r = eval( parse( text = s ) )
     # If the result isn't primitive, then it was probably parsed into
     # an unprintable object (e.g., "gray" becomes a colour). In those
     # cases, return the original text string. Otherwise, an atomic
     # value means a primitive type (string, integer, etc.) that can be
     # written directly into the document.
     ifelse( is.atomic( r ), r, s );
   },
   warning = function( w ) { s },
   error = function( e ) { s } )
+}
 # -----------------------------------------------------------------------------
 # Returns a date offset by a given number of days, relative to the given
 # date (d). This does not use the anchor, but is used to get the anchor's
 # value as a date.
 # -----------------------------------------------------------------------------
 when <- function( d, n = 0, format = "%Y-%m-%d" ) {
   as.Date( d, format = format ) + x( n )
+}
 # -----------------------------------------------------------------------------
 # Full date (s) offset by an optional number of days before or after.
 # This will remove leading zeros (applying leading spaces instead, which
 # are ignored by any worthwhile typesetting engine).
 # -----------------------------------------------------------------------------
 annal <- function( days = 0, format = "%Y-%m-%d", oformat = "%B %d, %Y" ) {
   gsub( " 0", " ", format( when( anchor, days ), format = oformat ) )
+}
 # -----------------------------------------------------------------------------
 # Extracts the year from a date string.
 # -----------------------------------------------------------------------------
 year <- function( days = 0, format = "%Y-%m-%d" ) {
   annal( days, format, "%Y" )
+}
 # -----------------------------------------------------------------------------
 # Day of the week (in days since the anchor date).
 # -----------------------------------------------------------------------------
 weekday <- function( n ) {
   weekdays( when( anchor, n ) )
+}
 # -----------------------------------------------------------------------------
 # String concatenate function alias because paste0 is a terrible name.
 # -----------------------------------------------------------------------------
 concat <- paste0
 # -----------------------------------------------------------------------------
 # Translates a number from digits to words using Chicago Manual of Style.
 # This will translate numbers greater than one by truncating to nearest
 # thousandth, millionth, billionth, etc. regardless of oridinal. If ordinal
 # is TRUE, this will return the ordinal name. This will not produce ordinals
 # for numbers greater than 100.
+#
 # If scaled is TRUE, this will write large numbers as comma-separated values.
 # -----------------------------------------------------------------------------
 cms <- function( n, ordinal = FALSE, scaled = TRUE ) {
   n <- x( n )
   if( n == 0 ) {
     if( ordinal ) {
       return( "zeroth" )
+    }
     return( "zero" )
+  }
   # Concatenate this a little later.
   if( n < 0 ) {
     result = "negative "
     n = abs( n )
+  }
   if( n > 999 && scaled ) {
     scales <- c(
       "thousand", "million", "billion", "trillion", "quadrillion",
       "quintillion", "sextillion", "septillion", "octillion", "nonillion",
       "decillion", "undecillion", "duodecillion", "tredecillion",
       "quattuordecillion", "quindecillion", "sexdecillion", "septendecillion",
       "octodecillion", "novemdecillion", "vigintillion", "centillion",
       "quadrillion", "quitillion", "sextillion"
     );
     d <- round( n / (10 ^ (log10( n ) - log10( n ) %% 3)) );
     n <- floor( log10( n ) ) / 3;
     return( paste( cms( d ), scales[ n ] ) );
+  }
   # Do not spell out numbers greater than one hundred.
   if( n > 100 ) {
     # Comma-separated numbers.
     return( commas( n ) )
+  }
   # Don't go beyond 100.
   if( n == 100 ) {
     if( ordinal ) {
       return( "one hundredth" )
+    }
     return( "one hundred" )
+  }
   # Samuel Langhorne Clemens noted English has too many exceptions.
   small = c(
     "one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
     "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen",
     "seventeen", "eighteen", "nineteen"
+  )
   ord_small = c(
     "first", "second", "third", "fourth", "fifth", "sixth", "seventh",
     "eighth", "ninth", "tenth", "eleventh", "twelfth", "thirteenth",
     "fourteenth", "fifteenth", "sixteenth", "seventeenth", "eighteenth",
     "nineteenth", "twentieth"
+  )
   # After this, the number (n) is between 20 and 99.
   if( n < 20 ) {
     if( ordinal ) {
       return( .subset( ord_small, n %% 100 ) )
+    }
     return( .subset( small, n %% 100 ) )
+  }
   tens = c( "",
     "twenty", "thirty", "forty", "fifty",
     "sixty", "seventy", "eighty", "ninety"
+  )
   ord_tens = c( "",
     "twentieth", "thirtieth", "fortieth", "fiftieth",
     "sixtieth", "seventieth", "eightieth", "ninetieth"
+  )
   ones_index = n %% 10
   n = n %/% 10
   # No number in the ones column, so the number must be a multiple of ten.
   if( ones_index == 0 ) {
     if( ordinal ) {
       return( .subset( ord_tens, n ) )
+    }
     return( .subset( tens, n ) )
+  }
   # Find the value from the ones column.
   if( ordinal ) {
     unit_1 = .subset( ord_small, ones_index )
+  }
   else {
     unit_1 = .subset( small, ones_index )
+  }
   # Find the tens column.
   unit_10 = .subset( tens, n )
   # Hyphenate the tens and the ones together.
   concat( unit_10, concat( "-", unit_1 ) )
+}
 cms.big <- function( n ) {
+}
 # -----------------------------------------------------------------------------
 # Returns a number as a comma-delimited string. This is a work-around
 # until Renjin fixes https://github.com/bedatadriven/renjin/issues/338
 # -----------------------------------------------------------------------------
 commas <- function( n ) {
   n <- x( n )
   s <- sprintf( "%03.0f", n %% 1000 )
   n <- n %/% 1000
   while( n > 0 ) {
     s <- concat( sprintf( "%03.0f", n %% 1000 ), ',', s )
     n <- n %/% 1000
+  }
   gsub( "^0*", '', s )
+}
 # -----------------------------------------------------------------------------
 # Returns a human-readable string that provides the elapsed time between
 # two numbers in terms of years, months, and days. If any unit value is zero,
 # the unit is not included. The words (year, month, day) are pluralized
 # according to English grammar. The numbers are written out according to
 # Chicago Manual of Style. This applies the serial comma.
+#
 # Both numbers are offsets relative to the anchor date.
+#
 # If all unit values are zero, this returns s ("same day" by default).
+#
 # If the start date (began) is greater than end date (ended), the dates are
 # swapped before calculations are performed. This allows any two dates
 # to be compared and positive unit values are always returned.
 # -----------------------------------------------------------------------------
 elapsed <- function( began, ended, s = "same day" ) {
   began = when( anchor, began )
   ended = when( anchor, ended )
   # Swap the dates if the end date comes before the start date.
   if( as.integer( ended - began ) < 0 ) {
     tempd = began
     began = ended
     ended = tempd
+  }
   # Calculate number of elapsed years.
   years = length( seq( from = began, to = ended, by = "year" ) ) - 1
   # Move the start date up by the number of elapsed years.
   if( years > 0 ) {
     began = seq( began, length = 2, by = concat( years, " years" ) )[2]
     years = pl.numeric( "year", years )
+  }
   else {
     # Zero years.
     years = ""
+  }
   # Calculate number of elapsed months, excluding years.
   months = length( seq( from = began, to = ended, by = "month" ) ) - 1
   # Move the start date up by the number of elapsed months
   if( months > 0 ) {
     began = seq( began, length = 2, by = concat( months, " months" ) )[2]
     months = pl.numeric( "month", months )
+  }
   else {
     # Zero months
     months = ""
+  }
   # Calculate number of elapsed days, excluding months and years.
   days = length( seq( from = began, to = ended, by = "day" ) ) - 1
   if( days > 0 ) {
     days = pl.numeric( "day", days )
+  }
   else {
     # Zero days
     days = ""
+  }
   if( years <= 0 && months <= 0 && days <= 0 ) {
     return( s )
+  }
   # Put them all in a vector, then remove the empty values.
   s <- c( years, months, days )
   s <- s[ s != "" ]
   r <- paste( s, collapse = ", " )
   # If all three items are present, replace the last comma with ", and".
   if( length( s ) > 2 ) {
     return( gsub( "(.*),", "\\1, and", r ) )
+  }
   # Does nothing if no commas are present.
   gsub( "(.*),", "\\1 and", r )
+}
 # -----------------------------------------------------------------------------
 # Returns the number (n) in English followed by the plural or singular
 # form of the given string (s; resumably a noun), if applicable, according
 # to English grammar. That is, pl.numeric( "wolf", 5 ) will return
 # "five wolves".
 # -----------------------------------------------------------------------------
 pl.numeric <- function( s, n ) {
   concat( cms( n ), concat( " ", pluralize( word=s, n=n ) ) )
+}
 # -----------------------------------------------------------------------------
 # Pluralize s if n is not equal to 1.
 # -----------------------------------------------------------------------------
 pl <- function( s, count=2 ) {
   pluralize( word=s, n=count )
+}
 # -----------------------------------------------------------------------------
 # Name of the season, starting with an capital letter.
 # -----------------------------------------------------------------------------
 season <- function( n, format = "%Y-%m-%d" ) {
   WS <- as.Date("2016-12-15", "%Y-%m-%d") # Winter Solstice
   SE <- as.Date("2016-03-15", "%Y-%m-%d") # Spring Equinox
   SS <- as.Date("2016-06-15", "%Y-%m-%d") # Summer Solstice
   AE <- as.Date("2016-09-15", "%Y-%m-%d") # Autumn Equinox
   d <- when( anchor, n )
   d <- as.Date( strftime( d, format="2016-%m-%d" ) )
   ifelse( d >= WS | d < SE, "Winter",
     ifelse( d >= SE & d < SS, "Spring",
       ifelse( d >= SS & d < AE, "Summer", "Autumn" )
+    )
+  )
+}
 # -----------------------------------------------------------------------------
 # Converts the first letter in a string to lowercase
 # -----------------------------------------------------------------------------
 lc <- function( s ) {
   concat( tolower( substr( s, 1, 1 ) ), substr( s, 2, nchar( s ) ) )
+}
 # -----------------------------------------------------------------------------
 # Converts the entire string to lowercase
 # -----------------------------------------------------------------------------
 lower <- tolower
 # -----------------------------------------------------------------------------
 # Converts the first letter in a string to uppercase
 # -----------------------------------------------------------------------------
 uc <- function( s ) {
   concat( toupper( substr( s, 1, 1 ) ), substr( s, 2, nchar( s ) ) )
+}
 # -----------------------------------------------------------------------------
 # Returns the number of days between the given dates.
 # -----------------------------------------------------------------------------
 days <- function( d1, d2, format = "%Y-%m-%d" ) {
   dates = c( d1, d2 )
   dt = strptime( dates, format = format )
   as.integer( difftime( dates[2], dates[1], units = "days" ) )
+}
 weeks <- function( began, ended ) {
   began = when( anchor, began )
   ended = when( anchor, ended )
   if( as.integer( ended - began ) < 0 ) {
     tempd = began
     began = ended
     ended = tempd
+  }
   # Calculate number of elapsed weeks.
   length( seq( from = began, to = ended, by = "weeks" ) ) - 1
+}
 # -----------------------------------------------------------------------------
 # Returns the number of years elapsed.
 # -----------------------------------------------------------------------------
 years <- function( began, ended ) {
   began = when( anchor, began )
   ended = when( anchor, ended )
   # Swap the dates if the end date comes before the start date.
   if( as.integer( ended - began ) < 0 ) {
     tempd = began
     began = ended
     ended = tempd
+  }
   # Calculate number of elapsed years.
   length( seq( from = began, to = ended, by = "year" ) ) - 1
+}
 # -----------------------------------------------------------------------------
 # Full name of the month, starting with a capital letter.
 # -----------------------------------------------------------------------------
 month <- function( n ) {
   # Faster than month.name[ x( n ) ]
   .subset( month.name, x( n ) )
+}
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 money <- function( n ) {
   commas( x( n ) )
+}
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 timeline <- function( n ) {
   concat( weekday( n ), ", ", annal( n ), " (", season( n ), ")" )
+}
 # -----------------------------------------------------------------------------
 # Rounds to the nearest base value (e.g., round to nearest 10).
+#
 # @param base The nearest value to round to.
 # -----------------------------------------------------------------------------
 round.up <- function( n, base = 5 ) {
   base * round( x( n ) / base )
+}
 # -----------------------------------------------------------------------------
 # Computes linear distance between two points using Haversine formula.
 # Although Earth is an oblate spheroid, this will produce results close
 # enough for most purposes.
+#
 # @param lat1/lon1 The source latitude and longitude.
 # @param lat2/lon2 The destination latitude and longitude.
 # @param radius The radius of the sphere.
+#
 # @return The distance between the two coordinates in meters.
 # -----------------------------------------------------------------------------
 haversine <- function( lat1, lon1, lat2, lon2, radius = 6371 ) {
   # Convert decimal degrees to radians
   lon1 = lon1 * pi / 180
   lon2 = lon2 * pi / 180
   lat1 = lat1 * pi / 180
   lat2 = lat2 * pi / 180
   # Haversine formula
   dlon = lon2 - lon1
   dlat = lat2 - lat1
   a = sin( dlat / 2 ) ** 2 + cos( lat1 ) * cos( lat2 ) * sin( dlon / 2 ) ** 2
   c = 2 * atan2( sqrt( a ), sqrt( 1-a ) )
   return( radius * c * 1000 )
+}

A R/csv.R

 # -----------------------------------------------------------------------------
 # Copyright 2020, White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be
 # included in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # Converts CSV to Markdown.
+#
 # Reads a CSV file and converts the contents to a Markdown table. The
 # file must be in the working directory as specified by setwd.
+#
 # @param f The filename to convert.
 # @param decimals Rounded decimal places (default 1).
 # @param totals Include total sums (default TRUE).
 # @param align Right-align numbers (default TRUE).
 # -----------------------------------------------------------------------------
 csv2md <- function( f, decimals = 2, totals = T, align = T, caption = "" ) {
   # Read the CVS data from the file; ensure strings become characters.
   df <- read.table( f, sep=',', header=T, stringsAsFactors=F )
   if( totals ) {
     # Determine what columns can be summed.
     number <- which( unlist( lapply( df, is.numeric ) ) )
     # Use colSums when more than one summable column exists.
     if( length( number ) > 1 ) {
       f.sum <- colSums
+    }
     else {
       f.sum <- sum
+    }
     # Calculate the sum of all the summable columns and insert the
     # results back into the data frame.
     df[ (nrow( df ) + 1), number ] <- f.sum( df[, number], na.rm=TRUE )
     # pluralize would be heavyweight here.
     if( length( number ) > 1 ) {
       t <- "Totals"
+    }
     else {
       t <- "Total"
+    }
     # Change the first column of the last line to "Total(s)".
     df[ nrow( df ), 1 ] <- t
     # Don't clutter the output with "NA" text.
     df[ is.na( df ) ] <- ""
+  }
   if( align ) {
     is.char <- vapply( df, is.character, logical( 1 ) )
     dashes <- paste( ifelse( is.char, ':---', '---:' ), collapse = '|' )
+  }
   else {
     dashes <- paste( rep( '---', length( df ) ), collapse = '|' )
+  }
   # Use pandoc syntax for table captions.
   if( caption != "" ) {
     caption <- paste( '\n[', caption, ']\n', sep='' )
+  }
   # Create a Markdown version of the data frame.
   paste(
     '|', paste( names( df ), collapse = '|'), '|', '\n',
     '|', dashes, '|', '\n',
     paste(
       '|',
       Reduce( function( x, y ) {
           paste( x, format( y, nsmall = decimals ), sep = '|' )
         }, df
       ),
       collapse = '|\n',sep=''
     ),
     '|',
     caption,
     sep=''
+  )
+}

A R/numeric.R

 # TODO: Finish the implementation
 # -----------------------------------------------------------------------------
 # Converts an integer value into English words. Negative numbers are prefixed
 # with the word minus. This is useful for very large numbers.
+#
 # See https://english.stackexchange.com/a/111837/22099
+#
 # @param n Any integer value, including zero, and negative numbers.
 # -----------------------------------------------------------------------------
 to.words <- function( n ) {
   s <- 'zero';
   if( n > 0 ) {
     s <- to.words.nz( n );
+  }
   else if( n < 0 ) {
     s <- paste0( 'minus ', to.words.nz( -n ) );
+  }
+  s
+}
 # -----------------------------------------------------------------------------
 # Converts a non-zero number into English words.
 # -----------------------------------------------------------------------------
 to.words.nz <- function( n ) {
   scales <- c(
     "thousand", "million", "billion", "trillion", "quadrillion",
     "quintillion", "sextillion", "septillion", "octillion", "nonillion",
     "decillion", "undecillion", "duodecillion", "tredecillion",
     "quattuordecillion", "quindecillion", "sexdecillion", "septendecillion",
     "octodecillion", "novemdecillion", "vigintillion", "centillion",
     "quadrillion", "quitillion", "sextillion"
   );
   i <- 0;
   s <- "";
   while( n > 0 ) {
     if( !(n %% 1000 == 0) ) {
       j <- if( n < 100 ) "," else "";
       s <- paste( to.words.help( n %% 1000 ), scales[ i ], j, s );
+    }
     n <- floor( n / 1000 );
     i <- i + 1;
+  }
+  s
+}
 to.words.help <- function( n ) {
   low <- c(
     "one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
     "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen",
     "seventeen", "eighteen", "nineteen"
   );
   tens <- c(
     "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"
   );
   if( n < 20 ) {
     s <- low[ n ];
+  }
   else if( n < 100 ) {
     d <- n %% 10;
     j <- if( d > 0 ) "-" else "";
     s <- paste0( tens[ (n / 10) - 1 ], j, to.words.help( d ) );
+  }
   else {
     d <- (n / 100);
     r <- (n %% 100);
     j <- if( r > 0 ) "and" else "";
     s <- paste( low[ d ], "hundred", j, to.words.help( r ) );
+  }
+  s
+}

A R/pluralize.R

 # -----------------------------------------------------------------------------
 # Copyright 2021 Robin Gertenbach.
+#
 # Copyright 2021 White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be
 # included in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # See Damian Conway's "An Algorithmic Approach to English Pluralization":
 #   http://goo.gl/oRL4MP
 # See Oliver Glerke's Evo Inflector: https://github.com/atteo/evo-inflector/
 # See Shevek's Pluralizer: https://github.com/shevek/linguistics/
 # See also: http://www.freevectors.net/assets/files/plural.txt
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # Applies all pluralization rules.
+#
 # @param word The word to pluralize.
 # @param method The pluralization approach to apply to the word.
 # @param n When any other value than 1, the word is pluralized.
 # -----------------------------------------------------------------------------
 pluralize <- function( word, method = c( "ac", "ca", "a", "c" ), n = 2 ) {
   if( n != 1 ) {
     method <- match.arg( method )
     coalesce(
       pluralize_non_inflecting( word ),
       pluralize_pronoun( word ),
       pluralize_irregular( word, method ),
       pluralize_irregular_inflection_for_common_suffixes( word ),
       pluralize_fully_assimilated_classical_inflections( word ),
       pluralize_classical_variants_of_modern_inflections( word, method ),
       pluralize_ch_sh_ss_suffixes( word ),
       pluralize_f_and_fe_suffix( word ),
       pluralize_y_suffix( word ),
       pluralize_o_suffix( word ),
       pluralize_compound_words( word ),
       pluralize_regular( word )
+    )
+  }
   else {
     word
+  }
+}
 # -----------------------------------------------------------------------------
 # Rule 1
+#
 # Retain non-inflective user-mapped noun as is.
+#
 # Rule 2
+#
 # Irregular verbs that do not inflect in plural.
 # -----------------------------------------------------------------------------
 pluralize_non_inflecting <- function( word ) {
   coalesce(
     ifelse( word %in% .uninflected_nouns, word, NA_character_ ),
     ifelse( word %in% .singular_nouns, word, NA_character_ ),
     ifelse( check_suffix( word, .irregular_patterns ), word, NA_character_ )
+  )
+}
 .check_non_inflecting <- function( word ) {
   is_uninflected <- word %in% .uninflected_nouns
   is_singular <- word %in% .singular_nouns
   is_irregular <- check_suffix( word, .irregular_patterns )
   is_uninflected | is_singular | is_irregular
+}
 .uninflected_nouns <- c(
   "adonis",
   "anis",
   "bison",
   "bream",
   "breeches",
   "britches",
   "carp",
   "chassis",
   "clippers",
   "cod",
   "contretemps",
   "corps",
   "debris",
   "diabetes",
   "djinn",
   "eland",
   "elk",
   "flounder",
   "gallows",
   "graffiti",
   "headquarters",
   "herpes",
   "high-jinks",
   "homework",
   "innings",
   "jackanapes",
   "mackerel",
   "measles",
   "mews",
   "mumps",
   "news",
   "pants",
   "physics",
   "pincers",
   "pliers",
   "proceedings",
   "rabies",
   "salmon",
   "scissors",
   "sea-bass",
   "series",
   "shears",
   "species",
   "swine",
   "trout",
   "tuna",
   "whiting",
   "wildebeest"
+)
 .singular_nouns <- c(
   "bathos",
   "caddis",
   "cannabis",
   "dais",
   "digitalis",
   "ethos",
   "glottis",
   "marquis",
   "pathos",
   "polis"
+)
 .irregular_patterns <- c(
   "fish$", "ois$", "-sheep$", "deer$", "pox$", "[A-Z].*ese$", "itis$"
+)
 .prepositions <- c(
   "about",
   "above",
   "across",
   "after",
   "among",
   "around",
   "at",
   "athwart",
   "before",
   "behind",
   "below",
   "beneath",
   "beside",
   "besides",
   "between",
   "betwixt",
   "beyond",
   "but",
   "by",
   "during",
   "except",
   "for",
   "from",
   "in",
   "into",
   "near",
   "of",
   "off",
   "on",
   "onto",
   "out",
   "over",
   "since",
   "till",
   "to",
   "under",
   "until",
   "unto",
   "upon",
   "with"
+)
 # -----------------------------------------------------------------------------
 # Rule 3
+#
 # Handle pronouns in the nominative, accusative, and dative and propositional
 # phrases.
 # -----------------------------------------------------------------------------
 pluralize_pronoun <- function( word ) {
   as.vector( .pluralized_pronouns[word] )
+}
 .pluralized_pronouns <- c(
   "I" = "we",
   "me" = "us",
   "myself" = "ourselves",
   "you" = "you",
   "thou" = "ye",
   "thee" = "ye",
   "yourself" = "yourself",
   "thyself" = "yourself",
   "she" = "they",
   "he" = "they",
   "it" = "they",
   "they" = "they",
   "her" = "them",
   "him" = "them",
   "it" = "them",
   "them" = "them",
   "herself" = "themselves",
   "himself" = "themselves",
   "itself" = "themselves",
   "themself" = "themselves",
   "oneself" = "oneselves"
+)
 # -----------------------------------------------------------------------------
 # Rule 4
+#
 # Change irregular plurals based on mapping.
 # -----------------------------------------------------------------------------
 pluralize_irregular <- function( word, method = c( "ac", "ca", "a", "c" ) ) {
   method <- match.arg( method )
   plurals <- .irregular_nouns[word]
   extract_plural <- function( plurals ) {
     if( is.null( plurals ) ) {
       return( NA_character_ )
+    }
     return(
       switch(
         method,
         "a" = plurals["a"],
         "c" = plurals["c"],
         "ac" = if.na( plurals["a"], plurals["c"] ),
         "ca" = if.na( plurals["c"], plurals["a"] )
+      )
+    )
+  }
   as.character( lapply( plurals, extract_plural ) )
+}
 .irregular_nouns <- list(
   "beef"      = c( "a" = "beefs",       "c" = "beeves" ),
   "brother"   = c( "a" = "brothers",    "c" = "brethren" ),
   "child"     = c( "a" = NA_character_, "c" = "children" ),
   "cherub"    = c( "a" = "cherubim",    "c" = NA_character_ ),
   "cow"       = c( "a" = "cows",        "c" = "kine" ),
   "ephemeris" = c( "a" = NA_character_, "c" = "ephemerides" ),
   "genie"     = c( "a" = "genies",      "c" = "genii" ),
   "matrix"    = c( "a" = NA_character_, "c" = "matrices" ),
   "money"     = c( "a" = "moneys",      "c" = "monies" ),
   "mongoose"  = c( "a" = "mongooses",   "c" = NA_character_ ),
   "mythos"    = c( "a" = NA_character_, "c" = "mythoi" ),
   "octopus"   = c( "a" = "octopuses",   "c" = "octopodes" ),
   "ox"        = c( "a" = NA_character_, "c" = "oxen" ),
   "passerby"  = c( "a" = NA_character_, "c" = "passersby" ),
   "soliloquy" = c( "a" = "soliloquies", "c" = NA_character_ ),
   "seraph"    = c( "a" = "seraphim",    "c" = NA_character_ ),
   "trilby"    = c( "a" = "trilbys",     "c" = NA_character_ ),
   "vertex"    = c( "a" = NA_character_, "c" = "vertices" ),
   "vortex"    = c( "a" = NA_character_, "c" = "vortices" )
+)
 # -----------------------------------------------------------------------------
 # Rule 5
+#
 # Handle irregular inflections for common suffixes.
 # -----------------------------------------------------------------------------
 pluralize_irregular_inflection_for_common_suffixes <- function( word ) {
   output <- sub( "man$", "men", word )
   output <- sub( "([ml])(ouse)$", "\\1ice", output )
   output <- sub( "tooth$", "teeth", output )
   output <- sub( "goose$", "geese", output )
   output <- sub( "foot$", "feet", output )
   output <- sub( "zoon$", "zoa", output )
   output <- sub( "([csx])(is)$", "\\1es", output )
   ifelse( output == word, NA_character_, output )
+}
 # -----------------------------------------------------------------------------
 # Rule 6
+#
 # Handle fully assimilated classical inflections.
 # -----------------------------------------------------------------------------
 pluralize_fully_assimilated_classical_inflections <- function( word ) {
   output <- replace_suffix(
     word, "", "e", c( "alumna", "alga", "vertebra" ) )
   output <- replace_suffix(
     output, "ex", "ices", c( "codex", "murex", "silex" ) )
   output <- replace_suffix(
     output, "on", "a", c(
       "aphelion",
       "asyndeton",
       "criterion",
       "hyperbaton",
       "noumenon",
       "organon",
       "perihelion",
       "phenomenon",
       "prolegomenon"
+    )
+  )
   output <- replace_suffix(
     output, "um", "a", c(
       "agendum",
       "bacterium",
       "candelabrum",
       "datum",
       "desideratum",
       "erratum",
       "extremum",
       "ovum",
       "stratum"
+    )
+  )
   ifelse( output == word, NA_character_, output )
+}
 # -----------------------------------------------------------------------------
 # Rule 7
+#
 # Classical variants of modern inflections (e.g., stigmata, soprani).
+#
 # See tables A.11 to A.13, A.15, A.16, A.18, A.21 to A.25.
 # -----------------------------------------------------------------------------
 pluralize_classical_variants_of_modern_inflections <- function(
   word, method = c( "ac", "ca", "a", "c" ) ) {
   method <- match.arg( method )
   # -a to -as (anglicized) or -ae (classical)
   a11 <- c(
     "abscissa",
     "amoeba",
     "antenna",
     "aurora",
     "formula",
     "hydra",
     "hyperbola",
     "lacuna",
     "medusa",
     "nebula",
     "nova",
     "parabola"
+  )
   # Table A.12: -a to -as (anglicized) or -ata (classical)
   a12 <- c(
     "anathema",
     "bema",
     "carcinoma",
     "charisma",
     "diploma",
     "dogma",
     "drama",
     "edema",
     "enema",
     "enigma",
     "gumma",
     "lemma",
     "lymphoma",
     "magma",
     "melisma",
     "miasma",
     "oedema",
     "sarcoma",
     "schema",
     "soma",
     "stigma",
     "stoma",
     "trauma"
+  )
   # Table A.13: -en to -ens (anglicized) or -ina (classical)
   a13 <- c( "stamen", "foramen", "lumen" )
   # Table A.15: -ex to -exes (anglicized) or -ices (classical)
   a15 <- c(
     "apex",
     "cortex",
     "index",
     "latex",
     "pontifex",
     "simplex",
     "vertex",
     "vortex"
+  )
   # Table A.16: -is to -ises (anglicized) or -ides (classical)
   a16 <- c( "iris", "clitoris" )
   # Table A.18: -o to -os (anglicized) or -i (classical)
   a18 <- c(
     "alto",
     "basso",
     "canto",
     "contralto",
     "crescendo",
     "solo",
     "soprano",
     "tempo"
+  )
   # Table A.21: -um to -ums (anglicized) or -a (classical)
   a21 <- c(
     "aquarium",
     "compendium",
     "consortium",
     "cranium",
     "curriculum",
     "dictum",
     "emporium",
     "enconium",
     "gymnasium",
     "honorarium",
     "interregnum",
     "lustrum",
     "maximum",
     "medium",
     "memorandum",
     "millenium",
     "minimum",
     "momentum",
     "optimum",
     "phylum",
     "quantum",
     "rostrum",
     "spectrum",
     "speculum",
     "stadium",
     "trapezium",
     "ultimatum",
     "vacuum",
     "velum"
+  )
   # Table A.22: -us to -uses (anglicized) or -i (classical)
   a22 <- c(
     "focus",
     "fungus",
     "genius",
     "incubus",
     "nimbus",
     "nucleolus",
     "radius",
     "stylus",
     "succubus",
     "torus",
     "umbilicus",
     "uterus"
+  )
   # Table A.23: -us to -uses (anglicized) or -us (classical)
   a23 <- c(
     "apparatus",
     "cantus",
     "coitus",
     "hiatus",
     "impetus",
     "nexus",
     "plexus",
     "prospectus",
     "sinus",
     "status"
+  )
   output <- replace_suffix( word, "", "im", c( "cherub", "goy", "seraph"  ) )
   output <- replace_suffix( output, "", "i", c( "afreet", "afrit", "efreet" ) )
   if( method %in% c( "a", "ac" ) ) {
     output <- replace_suffix( output, "us", "uses", a23 )
     output <- replace_suffix( output, "us", "uses", a22 )
     output <- replace_suffix( output, "um", "ums", a21 )
     output <- replace_suffix( output, "o", "os", a18 )
     output <- replace_suffix( output, "is", "ises", a16 )
     output <- replace_suffix( output, "ex", "exes", a15 )
     output <- replace_suffix( output, "en", "ens", a13 )
     output <- replace_suffix( output, "a", "as", a12 )
     output <- replace_suffix( output, "a", "as", a11 )
   } else {
     output <- replace_suffix( output, "us", "us", a23 )
     output <- replace_suffix( output, "us", "i", a22 )
     output <- replace_suffix( output, "um", "a", a21 )
     output <- replace_suffix( output, "o", "i", a18 )
     output <- replace_suffix( output, "is", "ides", a16 )
     output <- replace_suffix( output, "ex", "ices", a15 )
     output <- replace_suffix( output, "en", "ina", a13 )
     output <- replace_suffix( output, "a", "ata", a12 )
     output <- replace_suffix( output, "a", "ae", a11 )
+  }
   ifelse(
     output == word & (method %in% c( "a", "ac" ) | !word %in% a23),
     NA_character_,
     output
+  )
+}
 # -----------------------------------------------------------------------------
 # Rule 8
+#
 # Suffixes -ch, -sh, -ss, -x, and -z take -es as plural (e.g., churches,
 # classes).
 # -----------------------------------------------------------------------------
 pluralize_ch_sh_ss_suffixes <- function( word ) {
   output <- sub( "(([cs]h)|(x|z))$", "\\1es", word )
   output <- replace_suffix( output, "ss", "sses" )
   ifelse( output == word, NA_character_, output )
+}
 # -----------------------------------------------------------------------------
 # Rule 9
+#
 # Certain words ending in -f or -fe take -ves in the plural.
 # -----------------------------------------------------------------------------
 pluralize_f_and_fe_suffix <- function( word ) {
   output <- sub( "([aeo]l|[^d]ea|ar)f$", "\\1ves", word )
   output <- sub( "([nlw]i)fe$", "\\1ves", output )
   ifelse( output == word, NA_character_, output )
+}
 # -----------------------------------------------------------------------------
 # Rule 10
+#
 # Words ending in -y take -ies.
 # -----------------------------------------------------------------------------
 pluralize_y_suffix <- function( word ) {
   output <- sub( "([aeiou]y)$", "\\1s", word )
   output <- sub( "([A-Z].*y)$", "\\1s", output )
   output <- replace_suffix( output, "y", "ies" )
   ifelse( output == word, NA_character_, output )
+}
 # -----------------------------------------------------------------------------
 # Rule 11
+#
 # Some words ending in -o take -os (lassos, solos). See tables A.17 and A.18.
 # Others take -oes (potatoes, dominoes).
 # When -o is preceded by a vowel always take -os (folios, bamboos).
 # -----------------------------------------------------------------------------
 pluralize_o_suffix <- function( word, method = c( "ac", "ca", "a", "c" ) ) {
   method <- match.arg( method )
   # Table A.17: -o to -os
   a17 <- c(
     "albino",
     "archipelago",
     "armadillo",
     "commando",
     "ditto",
     "dynamo",
     "embryo",
     "fiasco",
     "generalissimo",
     "ghetto",
     "guano",
     "inferno",
     "jumbo",
     "lingo",
     "lumbago",
     "magneto",
     "manifesto",
     "medico",
     "octavo",
     "photo",
     "pro",
     "quarto",
     "rhino",
     "stylo"
+  )
   # Table A.18: -o to -os (anglicized) or -i (classical)
   a18 <- c(
     "alto",
     "basso",
     "canto",
     "contralto",
     "crescendo",
     "solo",
     "soprano",
     "tempo"
+  )
   output <- replace_suffix( word, "o", "os", a17 )
   replacement <- if( method %in% c( "c", "ca" ) ) "i" else "os"
   output <- replace_suffix( output, "o", replacement, a18 )
   ifelse( output == word, NA_character_, output )
+}
 # -----------------------------------------------------------------------------
 # Rule 12
+#
 # Compound word pluralization.
 # -----------------------------------------------------------------------------
 pluralize_compound_words <- function(
   word, method = c( "ac", "ca", "a", "c" ) ) {
   method <- match.arg( method )
   # "General" is pluralized.
   military <- c(
     "Adjutant",
     "Brigadier",
     "Lieutenant",
     "Major",
     "Quartermaster"
+  )
   # X of Y -> plural(X) of Y
   # X at Y -> plural(X) of Y
   # X Y general -> X plural(Y) general
   # X-in-Y -> plural(X)-in-Y
   # Major Generals
   # Adjutant Generals
   # Lieutenant Generals
   # Brigadier Generals
   # Quartermaster Generals
   pluralize_cw <- Vectorize(
     function( cw, seps ) {
       if( cw[length( cw )] %in% c( "General", "general" ) &&
           (!cw[length( cw )] %in% military) ) {
         cw[1] <- pluralize( cw[1], method )
       } else {
         cw[1] <- pluralize( cw[1], method )
+      }
       paste( paste0( seps, cw ), collapse = "" )
+    }
+  )
   parts <- strsplit( word, "[- ]+" )
   seps <- strsplit( word, "[^ -]+" )
   is_compound <- grepl( "[- ]", word )
   output <- word
   output[!is_compound] <- NA_character_
   output[is_compound] <- pluralize_cw( parts[is_compound], seps[is_compound] )
   output
+}
 # -----------------------------------------------------------------------------
 # Rule 13
+#
 # Add -es if ending in -s (e.g., tennis, lychnis); otherwise, add -s.
 # -----------------------------------------------------------------------------
 pluralize_regular <- function( word ) {
   ending <- 's'
   if( endsWith( word, ending ) ) {
     ending <- "es"
+  }
   paste0( word, ending )
+}
 # -----------------------------------------------------------------------------
 # Determines whether the word ends with one of the given suffixes.
 # -----------------------------------------------------------------------------
 check_suffix <- function( x, suffixes ) {
   pattern <- paste0( "(", paste( suffixes, collapse = "|" ), ")$" )
   grepl( pattern, x, ignore.case = TRUE )
+}
 # -----------------------------------------------------------------------------
 # Replaces the suffix of the word.
 # -----------------------------------------------------------------------------
 replace_suffix <- function( x, suffix, replacement, eligible = NULL ) {
   ifelse(
     is.null( eligible ) | x %in% eligible,
     sub( paste0( suffix, "$" ), replacement, x ),
+    x
+  )
+}
 # -----------------------------------------------------------------------------
 # Returns y if x is na, otherwise x.
 # -----------------------------------------------------------------------------
 if.na <- function( x, y ) {
   ifelse( is.na( x ), y, x )
+}
 # -----------------------------------------------------------------------------
 # Reduces the given function list.
 # -----------------------------------------------------------------------------
 coalesce <- function( ... ) {
   args <- list( ... )
   Reduce( if.na, args )
+}

A R/possessive.R

 # -----------------------------------------------------------------------------
 # Copyright 2020, White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be
 # included in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # Returns leftmost n characters of s.
 # -----------------------------------------------------------------------------
 lstr <- function( s, n = 1 ) {
   substr( s, 0, n )
+}
 # -----------------------------------------------------------------------------
 # Returns rightmost n characters of s.
 # -----------------------------------------------------------------------------
 rstr <- function( s, n = 1 ) {
   l <- nchar( s )
   substr( s, l - n + 1, l )
+}
 # -----------------------------------------------------------------------------
 # Returns the possessive form of the given word, s.
 # -----------------------------------------------------------------------------
 pos <- function( s ) {
   lcs <- tolower( s )
   pronouns <- c( 'your', 'our', 'her', 'it', 'their' )
   if( lcs == 'my' ) {
     # Change "[Mm]y" to "[Mm]ine".
     s <- paste0( lstr( s, 1 ), "ine" )
+  }
   else if( lcs %in% pronouns ) {
     # Append an s to most pronouns.
     s <- paste0( s, 's' )
+  }
   else if( lcs != 'his' ) {
     # Possessive for all other words except 'his'.
     s <- paste0( s, ifelse( rstr( s, 1 ) == 's', "'" ,"'s" ) )
+  }
+  s
+}
 pro.sub <- function( s ) {
   if( s == 'm' ) {
     s <- 'he'
+  }
   else if( s == 'f' ) {
     s <- 'she'
+  }
   else {
     s <- 'their'
+  }
+  s
+}
 pro.obj <- function( s ) {
   if( s == 'm' ) {
     s <- 'him'
+  }
   else if( s == 'f' ) {
     s <- 'her'
+  }
   else {
     s <- 'them'
+  }
+  s
+}
 pro.ref <- function( s ) {
   if( s == 'm' ) {
     s <- 'himself'
+  }
   else if( s == 'f' ) {
     s <- 'herself'
+  }
   else {
     s <- 'themselves'
+  }
+  s
+}
 pro.adj <- function( s ) {
   if( s == 'm' ) {
     s <- 'his'
+  }
   else if( s == 'f' ) {
     s <- 'her'
+  }
   else {
     s <- 'their'
+  }
+  s
+}
 pro.pos <- function( s ) {
   if( s == 'm' ) {
     s <- 'his'
+  }
   else if( s == 'f' ) {
     s <- 'hers'
+  }
   else {
     s <- 'theirs'
+  }
+  s
+}
 pro.noun <- function( s ) {
   if( s == 'm' ) {
     s <- 'man'
+  }
   else if( s == 'f' ) {
     s <- 'woman'
+  }
+  s
+}

A README.md

 ![Total Downloads](https://img.shields.io/github/downloads/DaveJarvis/keenwrite/total?color=blue&label=Total%20Downloads&style=flat) ![Release Downloads](https://img.shields.io/github/downloads/DaveJarvis/keenwrite/latest/total?color=purple&label=Release%20Downloads&style=flat) ![Released](https://img.shields.io/github/release-date/DaveJarvis/keenwrite?color=red&style=flat&label=Released) ![Version](https://img.shields.io/github/v/release/DaveJarvis/keenwrite?style=flat&label=Release)
 # ![Logo](docs/images/app-title.png)
 A free, open-source, cross-platform desktop Markdown editor that can produce beautifully typeset PDFs.
 ## Download
 Download one of the following editions:
 * [Windows](https://github.com/DaveJarvis/keenwrite/releases/latest/download/keenwrite.exe)
 * [Linux](https://github.com/DaveJarvis/keenwrite/releases/latest/download/keenwrite.bin)
 * [Java Archive](https://github.com/DaveJarvis/keenwrite/releases/latest/download/keenwrite.jar)
 ## Run
 Note that the first time the application runs, it will unpack itself into a local directory. Subsequent starts will be faster.
 ### Windows
 Double-click the application to start; give the application permission to run.
 ### Linux
 Execute the following commands in a terminal:
 ``` bash
 chmod +x keenwrite.bin
 ./keenwrite.bin
 ```
 ### Other
 On other platforms, such as MacOS, start the application as follows:
 . Download the *Full version* of the Java Runtime Environment, [JRE 19](https://bell-sw.com/pages/downloads).
 . Install the JRE (include JRE's `bin` directory in the `PATH` environment variable).
 . Open a new terminal.
 . Verify the installation: `java -version`
 . Download [keenwrite.jar](https://github.com/DaveJarvis/keenwrite/releases/latest/download/keenwrite.jar).
 . Download [keenwrite.sh](https://raw.githubusercontent.com/DaveJarvis/keenwrite/master/keenwrite.sh).
 . Place the `.jar` and `.sh` in the same directory.
 . Make `keenwrite.sh` executable: `chmod +x keenwrite.sh`
 . Run: `./keenwrite.sh`
 The application is started.
 ## Features
 The application offers:
 * User-defined interpolated strings
 * Auto-complete variable names based on variable values
 * High-quality PDF exports
 * Real-time spell check
 * Real-time rendering of math using TeX notation
 * Real-time document statistics (with CJK word separation)
 * Diagrams: Mermaid, GraphViz, UML, sequence, timing, and more
 * Dark, custom, and responsive user interface skins
 * Integrated file manager
 * Interactive document outline
 * Internationalized font support (e.g., Chinese, Japanese, Korean, etc.)
 * Support for Pandoc's fenced div extended attribute syntax
 * R integration
 * Customizable user interface having detachable tabs
 * Platform-independent (Windows, Linux, MacOS)
 ## Typesetting
 Typesetting to PDF files requires the following:
 * [Theme Pack](https://github.com/DaveJarvis/keenwrite-themes/releases/latest/download/theme-pack.zip)
 * [ConTeXt](https://wiki.contextgarden.net/Installation)
 ## Usage
 Read the [detailed documentation](docs/README.md) for using the application.
 ### Skins
 Read the [skins documentation](docs/skins.md) to learn about how to change
 the user interface appearance.
 ## Screenshots
 See [screenshots](docs/screenshots.md) for visuals.
 ## License
 This software is licensed under the [BSD 2-Clause License](LICENSE.md) and
 based on [Markdown-Writer-FX](https://github.com/JFormDesigner/markdown-writer-fx/blob/main/LICENSE).

A README.zh-CN.md

 # ![Logo](docs/images/app-title.zh-CN.png)
 智能写入是一个文本编辑器，它使用插值字符串引用外部定义的值。
 ## 下载
 下载以下版本之一:
 * [Windows](https://github.com/DaveJarvis/keenwrite/releases/latest/download/keenwrite.exe)
 * [Linux](https://github.com/DaveJarvis/keenwrite/releases/latest/download/keenwrite.bin)
 * [Java Archive](https://github.com/DaveJarvis/keenwrite/releases/latest/download/keenwrite.jar)
 ## 跑
 在第一次运行期间，应用程序将自身解压到本地目录中。随后的启动会更快。
 ### Windows
 双击应用程序以启动。您必须授予应用程序运行权限。
 升级时，删除以下目录:
     C:\Users\%USERNAME%\AppData\Local\warp\packages\keenwrite.exe
 ### Linux
 执行以下命令:
 ``` bash
 chmod +x keenwrite.bin
 ./keenwrite.bin
 ```
 ### Other
 Download and install a full version of [OpenJDK 19](https://bell-sw.com/pages/downloads) that includes JavaFX module support, then run:
 ``` bash
 java -jar keenwrite.jar
 ```
 ## 特征
 * 用户定义的插值字符串
 * 带变量替换的实时预览
 * 基于变量值自动完成变量名
 * 独立于操作系统
 * 打字时拼写检查
 * 使用TeX的子集编写数学公式
 * 嵌入R语句
 ## Typesetting
 排版到 PDF 文件需要以下內容:
 * [Theme Pack](https://github.com/DaveJarvis/keenwrite-themes/releases/latest/download/theme-pack.zip)
 * [ConTeXt](https://wiki.contextgarden.net/Installation)
 ## 软件使用
 有關使用該應用程序的信息，請參[閱詳細文檔](docs/README.md)。
 ## 截图
 ![GraphViz Diagram Screenshot](docs/images/screenshots/01.png)
 ![Korean Poem Screenshot](docs/images/screenshots/02.png)
 ![TeX Equations Screenshot](docs/images/screenshots/03.png)
 ## 软件许可证
 This software is licensed under the [BSD 2-Clause License](LICENSE.md) and
 based on [Markdown-Writer-FX](licenses/MARKDOWN-WRITER-FX.md).

A build.gradle

 import static org.gradle.api.JavaVersion.*
 buildscript {
   repositories {
     mavenCentral()
+  }
   dependencies {
     classpath 'org.owasp:dependency-check-gradle:7.4.3'
+  }
+}
 plugins {
   id 'application'
   id 'org.openjfx.javafxplugin' version '0.0.13'
   id 'com.palantir.git-version' version '0.15.0'
+}
 apply plugin: 'org.owasp.dependencycheck'
 repositories {
   mavenCentral()
   maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
   maven { url 'https://nexus.bedatadriven.com/content/groups/public' }
   maven {
     url "https://css4j.github.io/maven"
     mavenContent {
       releasesOnly()
+    }
     content {
       includeGroup 'com.github.css4j'
       includeGroup 'io.sf.carte'
       includeGroup 'io.sf.jclf'
+    }
+  }
+}
 // Assume a cross-platform überjar unless targetOs is set.
 String[] os = ['win', 'mac', 'linux']
 if (project.hasProperty( 'targetOs' )) {
   if ('windows' == targetOs) {
     os = ["win"]
   } else {
     os = [targetOs]
+  }
+}
 def moduleSecurity = [
     '--add-opens=javafx.graphics/javafx.scene=ALL-UNNAMED',
     '--add-opens=javafx.controls/javafx.scene.control=ALL-UNNAMED',
     '--add-opens=javafx.controls/javafx.scene.control.skin=ALL-UNNAMED',
     '--add-opens=javafx.graphics/javafx.scene.text=ALL-UNNAMED',
     '--add-opens=javafx.graphics/com.sun.javafx.css=ALL-UNNAMED',
     '--add-opens=javafx.graphics/com.sun.javafx.text=ALL-UNNAMED',
     '--add-exports=javafx.base/com.sun.javafx.event=ALL-UNNAMED',
     '--add-exports=javafx.graphics/com.sun.javafx.application=ALL-UNNAMED',
     '--add-exports=javafx.graphics/com.sun.javafx.geom=ALL-UNNAMED',
     '--add-exports=javafx.graphics/com.sun.javafx.text=ALL-UNNAMED',
     '--add-exports=javafx.graphics/com.sun.javafx.scene=ALL-UNNAMED',
     '--add-exports=javafx.graphics/com.sun.javafx.scene.text=ALL-UNNAMED',
     '--add-exports=javafx.graphics/com.sun.javafx.scene.traversal=ALL-UNNAMED',
+]
 javafx {
   version = '19'
   modules = ['javafx.base', 'javafx.controls', 'javafx.graphics', 'javafx.swing']
   configuration = 'compileOnly'
+}
 dependencies {
   def v_junit = '5.9.1'
   def v_flexmark = '0.64.0'
   def v_jackson = '2.14.0'
   def v_echosvg = '0.2.2'
   def v_picocli = '4.7.0'
   // JavaFX
   implementation 'org.controlsfx:controlsfx:11.1.2'
   implementation 'org.fxmisc.richtext:richtextfx:0.11.0'
   implementation 'org.fxmisc.flowless:flowless:0.7.0'
   implementation 'org.fxmisc.wellbehaved:wellbehavedfx:0.3.3'
   implementation 'com.miglayout:miglayout-javafx:11.0'
   implementation 'com.dlsc.preferencesfx:preferencesfx-core:11.11.0'
   implementation 'com.panemu:tiwulfx-dock:0.2'
   // Markdown
   implementation "com.vladsch.flexmark:flexmark:${v_flexmark}"
   implementation "com.vladsch.flexmark:flexmark-ext-definition:${v_flexmark}"
   implementation "com.vladsch.flexmark:flexmark-ext-gfm-strikethrough:${v_flexmark}"
   implementation "com.vladsch.flexmark:flexmark-ext-superscript:${v_flexmark}"
   implementation "com.vladsch.flexmark:flexmark-ext-tables:${v_flexmark}"
   implementation "com.vladsch.flexmark:flexmark-ext-typographic:${v_flexmark}"
   // YAML
   implementation "com.fasterxml.jackson.core:jackson-core:${v_jackson}"
   implementation "com.fasterxml.jackson.core:jackson-databind:${v_jackson}"
   implementation "com.fasterxml.jackson.core:jackson-annotations:${v_jackson}"
   implementation "com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:${v_jackson}"
   // HTML parsing and rendering
   implementation 'org.jsoup:jsoup:1.15.3'
   // TODO: https://github.com/flyingsaucerproject/flyingsaucer/pull/170
   //implementation 'org.xhtmlrenderer:flying-saucer-core:9.1.22'
   // R
   implementation 'org.renjin:renjin-script-engine:3.5-beta76'
   implementation 'org.renjin.cran:rjson:0.2.15-renjin-21'
   // SVG
   implementation "io.sf.carte:echosvg-awt-util:${v_echosvg}"
   implementation "io.sf.carte:echosvg-bridge:${v_echosvg}"
   implementation "io.sf.carte:echosvg-css:${v_echosvg}"
   implementation "io.sf.carte:echosvg-dom:${v_echosvg}"
   implementation "io.sf.carte:echosvg-ext:${v_echosvg}"
   implementation "io.sf.carte:echosvg-gvt:${v_echosvg}"
   implementation "io.sf.carte:echosvg-parser:${v_echosvg}"
   implementation "io.sf.carte:echosvg-script:${v_echosvg}"
   implementation "io.sf.carte:echosvg-svg-dom:${v_echosvg}"
   implementation "io.sf.carte:echosvg-svggen:${v_echosvg}"
   implementation "io.sf.carte:echosvg-transcoder:${v_echosvg}"
   implementation "io.sf.carte:echosvg-util:${v_echosvg}"
   implementation "io.sf.carte:echosvg-xml:${v_echosvg}"
   // Misc.
   implementation 'org.ahocorasick:ahocorasick:0.6.3'
   implementation 'org.apache.commons:commons-configuration2:2.8.0'
   implementation 'com.googlecode.juniversalchardet:juniversalchardet:1.0.3'
   implementation 'javax.validation:validation-api:2.0.1.Final'
   implementation 'org.greenrobot:eventbus-java:3.3.1'
   implementation 'commons-beanutils:commons-beanutils:1.9.4'
   // Command-line parsing
   implementation "info.picocli:picocli:${v_picocli}"
   annotationProcessor "info.picocli:picocli-codegen:${v_picocli}"
   // KeenQuotes, KeenType, KeenSpell, word split.
   implementation fileTree( include: ['**/*.jar'], dir: 'libs' )
   def fx = ['controls', 'graphics', 'fxml', 'swing']
   fx.each { fxitem ->
     os.each { ositem ->
       runtimeOnly "org.openjfx:javafx-${fxitem}:${javafx.version}:${ositem}"
+    }
+  }
   testImplementation 'org.testfx:testfx-junit5:4.0.16-alpha'
   testImplementation "org.junit.jupiter:junit-jupiter-api:${v_junit}"
   testImplementation "org.junit.jupiter:junit-jupiter-params:${v_junit}"
   testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
+}
 final resourceDir = sourceSets.main.resources.srcDirs[0]
 final Properties config = new Properties()
 final File configFile = file( "${resourceDir}/bootstrap.properties" )
 final FileInputStream configStream = new FileInputStream( configFile )
 config.load( configStream )
 configStream.close()
 final String applicationName = config.get( 'application.title' ).toString().toLowerCase()
 final String applicationPackage = "com.${applicationName}"
 final String applicationClass = "${applicationPackage}.Launcher"
 java {
   sourceCompatibility = VERSION_17
   targetCompatibility = VERSION_17
+}
 compileJava {
   options.compilerArgs += [
       "-Xlint:unchecked",
       "-Xlint:deprecation",
       "-Aproject=${applicationPackage}/${applicationName}"
+  ]
+}
 application {
   mainClass.set( applicationClass )
   applicationDefaultJvmArgs = moduleSecurity
+}
 version = gitVersion()
 final File p = new File( "${resourceDir}/com/${applicationName}/app.properties" )
 p.write( "application.version=${version}" )
 jar {
   duplicatesStrategy = DuplicatesStrategy.EXCLUDE
   doFirst {
     manifest {
       attributes 'Main-Class': applicationClass
+    }
+  }
   from {
     (configurations.runtimeClasspath.findAll { !it.path.endsWith( ".pom" ) })
         .collect { it.isDirectory() ? it : zipTree( it ) }
+  }
   archiveFileName = "${applicationName}.jar"
   exclude 'META-INF/*.RSA', 'META-INF/*.SF', 'META-INF/*.DSA'
+}
 distributions {
   main {
     distributionBaseName.set( applicationName )
     contents {
       from { ['LICENSE.md', 'README.md'] }
       into( 'images' ) {
         from { 'images' }
+      }
+    }
+  }
+}
 test {
   useJUnitPlatform()
   doFirst { jvmArgs = moduleSecurity }
   testLogging { exceptionFormat = 'full' }
+}

A container/Containerfile

 # ########################################################################
+#
 # Copyright 2022 White Magic Software, Ltd.
+#
 # Creates a container image that can run ConTeXt to typeset documents.
+#
 # ########################################################################
 LABEL org.opencontainers.image.description Configures a typesetting system.
 FROM alpine:latest
 ENV ENV="/etc/profile"
 ENV PROFILE=/etc/profile
 ENV INSTALL_DIR=/opt
 ENV SOURCE_DIR=/root/source
 ENV TARGET_DIR=/root/target
 ENV IMAGES_DIR=/root/images
 ENV THEMES_DIR=/root/themes
 ENV CACHES_DIR=/root/caches
 ENV FONTS_DIR=/usr/share/fonts/user
 ENV DOWNLOAD_DIR=/root
 ENV CONTEXT_HOME=$INSTALL_DIR/context
 # ########################################################################
+#
 # Download all required dependencies
+#
 # ########################################################################
 WORKDIR $DOWNLOAD_DIR
 # Carlito (Calibri replacement)
 ADD "https://github.com/googlefonts/carlito/raw/main/fonts/ttf/Carlito-Regular.ttf" "Carlito-Regular.ttf"
 ADD "https://github.com/googlefonts/carlito/raw/main/fonts/ttf/Carlito-Bold.ttf" "Carlito-Bold.ttf"
 ADD "https://github.com/googlefonts/carlito/raw/main/fonts/ttf/Carlito-Italic.ttf" "Carlito-Italic.ttf"
 ADD "https://github.com/googlefonts/carlito/raw/main/fonts/ttf/Carlito-BoldItalic.ttf" "Carlito-BoldItalic.ttf"
 # Open Sans Emoji
 ADD "https://github.com/MorbZ/OpenSansEmoji/raw/master/OpenSansEmoji.ttf" "OpenSansEmoji.ttf"
 # Underwood Quiet Tab
 ADD "https://site.xavier.edu/polt/typewriters/Underwood_Quiet_Tab.ttf" "Underwood_Quiet_Tab.ttf"
 # Archives
 ADD "https://fonts.google.com/download?family=Courier%20Prime" "courier-prime.zip"
 ADD "https://fonts.google.com/download?family=Inconsolata" "inconsolata.zip"
 ADD "https://fonts.google.com/download?family=Libre%20Baskerville" "libre-baskerville.zip"
 ADD "https://fonts.google.com/download?family=Nunito" "nunito.zip"
 ADD "https://fonts.google.com/download?family=Roboto" "roboto.zip"
 ADD "https://fonts.google.com/download?family=Roboto%20Mono" "roboto-mono.zip"
 ADD "https://github.com/adobe-fonts/source-serif/releases/download/4.004R/source-serif-4.004.zip" "source-serif.zip"
 ADD "https://www.omnibus-type.com/wp-content/uploads/Archivo-Narrow.zip" "archivo-narrow.zip"
 # Typesetting software
 ADD "http://lmtx.pragma-ade.nl/install-lmtx/context-linuxmusl.zip" "context.zip"
 # ########################################################################
+#
 # Install components, modules, configure system, remove unnecessary files
+#
 # ########################################################################
 WORKDIR $CONTEXT_HOME
 RUN \
   apk --update --no-cache \
     add ca-certificates curl fontconfig inkscape rsync && \
   mkdir -p \
     "$FONTS_DIR" "$INSTALL_DIR" \
     "$TARGET_DIR" "$SOURCE_DIR" "$THEMES_DIR" "$IMAGES_DIR" "$CACHES_DIR" && \
   echo "export CONTEXT_HOME=\"$CONTEXT_HOME\"" >> $PROFILE && \
   echo "export PATH=\"\$PATH:\$CONTEXT_HOME/tex/texmf-linuxmusl/bin\"" >> $PROFILE && \
   echo "export OSFONTDIR=\"/usr/share/fonts//\"" >> $PROFILE && \
   echo "PS1='\\u@typesetter:\\w\\$ '" >> $PROFILE && \
   unzip -d $CONTEXT_HOME $DOWNLOAD_DIR/context.zip && \
   unzip -j -o -d $FONTS_DIR $DOWNLOAD_DIR/courier-prime.zip "*.ttf" && \
   unzip -j -o -d $FONTS_DIR $DOWNLOAD_DIR/libre-baskerville.zip "*.ttf" && \
   unzip -j -o -d $FONTS_DIR $DOWNLOAD_DIR/inconsolata.zip "**/Inconsolata/*.ttf" && \
   unzip -j -o -d $FONTS_DIR $DOWNLOAD_DIR/nunito.zip "static/*.ttf" && \
   unzip -j -o -d $FONTS_DIR $DOWNLOAD_DIR/roboto.zip "*.ttf" && \
   unzip -j -o -d $FONTS_DIR $DOWNLOAD_DIR/roboto-mono.zip "static/*.ttf" && \
   unzip -j -o -d $FONTS_DIR $DOWNLOAD_DIR/source-serif.zip "source-serif-4.004/OTF/SourceSerif4-*.otf" && \
   unzip -j -o -d $FONTS_DIR $DOWNLOAD_DIR/archivo-narrow.zip "Archivo-Narrow/otf/*.otf" && \
   mv $DOWNLOAD_DIR/*tf $FONTS_DIR && \
   fc-cache -f -v && \
   mkdir -p tex && \
   rsync \
     --recursive --links --times \
     --info=progress2,remove,symsafe,flist,del \
     --human-readable --del \
     rsync://contextgarden.net/minimals/current/modules/ modules && \
   rsync \
     -rlt --exclude=/VERSION --del modules/*/ tex/texmf-modules && \
   sh install.sh && \
   rm -f $DOWNLOAD_DIR/*.zip && \
   rm -rf \
     "modules" \
     "/var/cache" \
     "/usr/share/icons" \
     $CONTEXT_HOME/tex/texmf-modules/doc \
     $CONTEXT_HOME/tex/texmf-context/doc && \
   mkdir -p $CONTEXT_HOME/tex/texmf-fonts/tex/context/user && \
   ln -s $CONTEXT_HOME/tex/texmf-fonts/tex/context/user $HOME/fonts && \
   source $PROFILE && \
   mtxrun --generate && \
   find \
     /usr/share/inkscape \
     -type f -not -iname "*.xml" -exec rm {} \; && \
   find \
     $CONTEXT_HOME \
     -type f \
       \( -iname \*.pdf -o -iname \*.txt -o -iname \*.log \) \
     -exec rm {} \;
 # ########################################################################
+#
 # Ensure login goes to the target directory. ConTeXt prefers to export to
 # the current working directory.
+#
 # ########################################################################
 WORKDIR $TARGET_DIR

A container/manage.sh

 #!/usr/bin/env bash
 # ---------------------------------------------------------------------------
 # Copyright 2022 White Magic Software, Ltd.
+#
 # This script manages the container configured to run ConTeXt.
 # ---------------------------------------------------------------------------
 source ../scripts/build-template
 readonly BUILD_DIR=build
 readonly PROPERTIES="${SCRIPT_DIR}/../src/main/resources/bootstrap.properties"
 # Read the properties file to get the container version.
 while IFS='=' read -r key value
 do
   key=$(echo $key | tr '.' '_')
   eval ${key}=\${value}
 done < "${PROPERTIES}"
 readonly CONTAINER_EXE=podman
 readonly CONTAINER_SHORTNAME=typesetter
 readonly CONTAINER_VERSION=${container_version}
 readonly CONTAINER_NETWORK=host
 readonly CONTAINER_FILE="${CONTAINER_SHORTNAME}"
 readonly CONTAINER_ARCHIVE_FILE="${CONTAINER_FILE}.tar"
 readonly CONTAINER_ARCHIVE_PATH="${BUILD_DIR}/${CONTAINER_ARCHIVE_FILE}"
 readonly CONTAINER_COMPRESSED_FILE="${CONTAINER_ARCHIVE_FILE}.gz"
 readonly CONTAINER_COMPRESSED_PATH="${BUILD_DIR}/${CONTAINER_ARCHIVE_FILE}.gz"
 readonly CONTAINER_DIR_SOURCE="/root/source"
 readonly CONTAINER_DIR_TARGET="/root/target"
 readonly CONTAINER_DIR_IMAGES="/root/images"
 readonly CONTAINER_DIR_FONTS="/root/fonts"
 readonly CONTAINER_REPO=ghcr.io
 ARG_CONTAINER_NAME="${CONTAINER_SHORTNAME}:${CONTAINER_VERSION}"
 ARG_CONTAINER_COMMAND="context --version"
 ARG_MOUNTPOINT_SOURCE=""
 ARG_MOUNTPOINT_TARGET="."
 ARG_MOUNTPOINT_IMAGES=""
 ARG_MOUNTPOINT_FONTS="${HOME}/.fonts"
 ARG_ACCESS_TOKEN=""
 DEPENDENCIES=(
   "podman,https://podman.io"
   "tar,https://www.gnu.org/software/tar"
   "bzip2,https://gitlab.com/bzip2/bzip2"
+)
 ARGUMENTS+=(
   "b,build,Build container"
   "c,connect,Connect to container"
   "d,delete,Remove all containers"
   "s,source,Set mount point for input document (before typesetting)"
   "t,target,Set mount point for output file (after typesetting)"
   "i,images,Set mount point for image files (to typeset)"
   "f,fonts,Set mount point for font files (during typesetting)"
   "k,token,Set personal access token (to publish)"
   "l,load,Load container (${CONTAINER_COMPRESSED_PATH})"
   "p,publish,Publish the container (after logging in)"
   "r,run,Run a command in the container (\"${ARG_CONTAINER_COMMAND}\")"
   "v,version,Set container version to publish (${CONTAINER_VERSION})"
   "x,export,Save container (${CONTAINER_COMPRESSED_PATH})"
+)
 # ---------------------------------------------------------------------------
 # Manages the container.
 # ---------------------------------------------------------------------------
 execute() {
   $do_delete
   $do_build
   $do_publish
   $do_export
   $do_load
   $do_execute
   $do_connect
   return 1
+}
 # ---------------------------------------------------------------------------
 # Deletes all containers.
 # ---------------------------------------------------------------------------
 utile_delete() {
   $log "Deleting all containers"
   ${CONTAINER_EXE} rmi --all --force > /dev/null
   $log "Containers deleted"
+}
 # ---------------------------------------------------------------------------
 # Builds the container file in the current working directory.
 # ---------------------------------------------------------------------------
 utile_build() {
   $log "Building"
   # Show what commands are run while building, but not the commands' output.
   ${CONTAINER_EXE} build \
     --network=${CONTAINER_NETWORK} \
     --squash \
     -t ${ARG_CONTAINER_NAME} . | \
   grep ^STEP
+}
 # ---------------------------------------------------------------------------
 # Publishes the container to the repository.
 # ---------------------------------------------------------------------------
 utile_publish() {
   local -r username=$(git config user.name | tr '[A-Z]' '[a-z]')
   local -r repo="${CONTAINER_REPO}/${username}/${ARG_CONTAINER_NAME}"
   if [ ! -z ${ARG_ACCESS_TOKEN} ]; then
     echo ${ARG_ACCESS_TOKEN} | \
       ${CONTAINER_EXE} login ghcr.io -u $(git config user.name) --password-stdin
     $log "Tagging"
     ${CONTAINER_EXE} tag ${ARG_CONTAINER_NAME} ${repo}
     $log "Pushing ${ARG_CONTAINER_NAME} to ${CONTAINER_REPO}"
     ${CONTAINER_EXE} push ${repo}
     $log "Published ${ARG_CONTAINER_NAME} to ${CONTAINER_REPO}"
   else
     error "Provide a personal access token (-k TOKEN) to publish."
   fi
+}
 # ---------------------------------------------------------------------------
 # Creates the command-line option for a read-only mountpoint.
+#
 # $1 - The host directory.
 # $2 - The guest (container) directory.
 # $3 - The file system permissions (set to 1 for read-write).
 # ---------------------------------------------------------------------------
 get_mountpoint() {
   $log "Mounting ${1} as ${2}"
   local result=""
   local binding="ro"
   if [ ! -z "${3+x}" ]; then
     binding="Z"
   fi
   if [ ! -z "${1}" ]; then
     result="-v ${1}:${2}:${binding}"
   fi
   echo "${result}"
+}
 get_mountpoint_source() {
   echo $(get_mountpoint "${ARG_MOUNTPOINT_SOURCE}" "${CONTAINER_DIR_SOURCE}")
+}
 get_mountpoint_target() {
   echo $(get_mountpoint "${ARG_MOUNTPOINT_TARGET}" "${CONTAINER_DIR_TARGET}" 1)
+}
 get_mountpoint_images() {
   echo $(get_mountpoint "${ARG_MOUNTPOINT_IMAGES}" "${CONTAINER_DIR_IMAGES}")
+}
 get_mountpoint_fonts() {
   echo $(get_mountpoint "${ARG_MOUNTPOINT_FONTS}" "${CONTAINER_DIR_FONTS}")
+}
 # ---------------------------------------------------------------------------
 # Connects to the container.
 # ---------------------------------------------------------------------------
 utile_connect() {
   $log "Connecting to container"
   declare -r mount_source=$(get_mountpoint_source)
   declare -r mount_target=$(get_mountpoint_target)
   declare -r mount_images=$(get_mountpoint_images)
   declare -r mount_fonts=$(get_mountpoint_fonts)
   ${CONTAINER_EXE} run \
     --network="${CONTAINER_NETWORK}" \
     --rm \
     -it \
     ${mount_source} \
     ${mount_target} \
     ${mount_images} \
     ${mount_fonts} \
     "${ARG_CONTAINER_NAME}"
+}
 # ---------------------------------------------------------------------------
 # Runs a command in the container.
+#
 # Examples:
+#
 #   ./manage.sh -r "ls /"
 #   ./manage.sh -r "context --version"
 # ---------------------------------------------------------------------------
 utile_execute() {
   $log "Running \"${ARG_CONTAINER_COMMAND}\":"
   ${CONTAINER_EXE} run \
     --network=${CONTAINER_NETWORK} \
     --rm \
     -i \
     -t "${ARG_CONTAINER_NAME}" \
     /bin/sh --login -c "${ARG_CONTAINER_COMMAND}"
+}
 # ---------------------------------------------------------------------------
 # Saves the container to a file.
 # ---------------------------------------------------------------------------
 utile_export() {
   if [[ -f "${CONTAINER_COMPRESSED_PATH}" ]]; then
     warning "${CONTAINER_COMPRESSED_PATH} exists, delete before saving."
   else
     $log "Saving ${CONTAINER_SHORTNAME} image"
     mkdir -p "${BUILD_DIR}"
     ${CONTAINER_EXE} save \
       --quiet \
       -o "${BUILD_DIR}/${CONTAINER_ARCHIVE_FILE}" \
       "${ARG_CONTAINER_NAME}"
     $log "Compressing to ${CONTAINER_COMPRESSED_PATH}"
     gzip "${CONTAINER_ARCHIVE_PATH}"
     $log "Saved ${CONTAINER_SHORTNAME} image"
   fi
+}
 # ---------------------------------------------------------------------------
 # Loads the container from a file.
 # ---------------------------------------------------------------------------
 utile_load() {
   if [[ -f "${CONTAINER_COMPRESSED_PATH}" ]]; then
     $log "Loading ${CONTAINER_SHORTNAME} from ${CONTAINER_COMPRESSED_PATH}"
     ${CONTAINER_EXE} load \
       --quiet \
       -i "${CONTAINER_COMPRESSED_PATH}"
     $log "Loaded ${CONTAINER_SHORTNAME} image"
   else
     warning "Missing ${CONTAINER_COMPRESSED_PATH}; use build follwed by save"
   fi
+}
 argument() {
   local consume=1
   case "$1" in
     -b|--build)
     do_build=utile_build
     ;;
     -c|--connect)
     do_connect=utile_connect
     ;;
     -d|--delete)
     do_delete=utile_delete
     ;;
     -k|--token)
     if [ ! -z "${2+x}" ]; then
       ARG_ACCESS_TOKEN="$2"
       consume=2
     fi
     ;;
     -l|--load)
     do_load=utile_load
     ;;
     -i|--images)
     if [ ! -z "${2+x}" ]; then
       ARG_MOUNTPOINT_IMAGES="$2"
       consume=2
     fi
     ;;
     -t|--target)
     if [ ! -z "${2+x}" ]; then
       ARG_MOUNTPOINT_TARGET="$2"
       consume=2
     fi
     ;;
     -p|--publish)
     do_publish=utile_publish
     ;;
     -r|--run)
     do_execute=utile_execute
     if [ ! -z "${2+x}" ]; then
       ARG_CONTAINER_COMMAND="$2"
       consume=2
     fi
     ;;
     -s|--source)
     if [ ! -z "${2+x}" ]; then
       ARG_MOUNTPOINT_SOURCE="$2"
       consume=2
     fi
     ;;
     -v|--version)
     if [ ! -z "${2+x}" ]; then
       ARG_CONTAINER_NAME="${CONTAINER_SHORTNAME}:$2"
       consume=2
     fi
     ;;
     -x|--export)
     do_export=utile_export
     ;;
   esac
   return ${consume}
+}
 do_build=:
 do_connect=:
 do_delete=:
 do_execute=:
 do_load=:
 do_publish=:
 do_export=:
 main "$@"

A docs/README.md

 # Documentation
 The following documents have additional details about using the editor:
 * [cmd.md](cmd.md) -- Command-line argument usage
 * [div.md](div.md) -- Syntax for annotated text (fenced divs)
 * [i18n.md](i18n.md) -- Internationalization features
 * [r.md](r.md) -- R functions within R Markdown documents
 * [samples](samples) -- Example documents
 * [skins.md](skins.md) -- User interface customization
 * [svg.md](svg.md) -- Resolve issues with some SVG files
 * [metadata.md](metadata.md) -- Document metadata
 * [typesetting.md](typesetting.md) -- Document typesetting
 * [variables.md](variables.md) -- Variable definitions and interpolation
 # Contributions
 * [credits.md](credits.md) -- Thanks to authors of contributing projects
 * [licenses](licenses) -- Third-party licenses

A docs/cmd.md

 # Command-line arguments
 The application may be run from the command-line to convert Markdown and
 R Markdown files to a variety of output formats. Without specifying any
 command-line arguments, the application will launch a graphical user interface.
 ## Common arguments
 The most common command-line arguments to use include:
 * `-h` -- displays all command-line arguments, then exits.
 * `-i` -- sets the input file name, must be a full path.
 * `-o` -- sets the output file name, can be a relative path.
 ## Example usage
 On Linux, simple usages include:
     keenwrite.bin -i $HOME/document/01.md -o document.xhtml
     keenwrite.bin -i $HOME/document/01.md -o document.md \
       -v $HOME/document/variables.yaml
 That command will convert `01.md` into the respective file formats. In
 the first case, it will become an HTML page. In the second case, it will
 become a Markdown document with all variables interpolated and replaced.
 A more complex example follows:
     keenwrite.bin -i $HOME/document/01.Rmd -o document.pdf \
       --image-dir=$HOME/document/images -v $HOME/document/variables.yaml \
       --metadata="title={{book.title}}" --metadata="author={{book.author}}" \
       --r-dir=$HOME/document/r --r-script=$HOME/document/r/bootstrap.R \
       --theme-dir=$HOME/document/themes/boschet
 That command will convert `01.Rmd` to `document.pdf` and replace the metadata
 using values from the variable definitions file.
 Directory names containing spaces must be quoted. For example, on Windows:
     keenwrite.bin -i "C:\Users\My Documents\01.Rmd" -o document.pdf

A docs/credits.md

 # Credits
 * Karl Tauber: [Markdown Writer FX](https://github.com/JFormDesigner/markdown-writer-fx)
 * Tomas Mikula: [RichTextFX](https://github.com/TomasMikula/RichTextFX), [ReactFX](https://github.com/TomasMikula/ReactFX), [WellBehavedFX](https://github.com/TomasMikula/WellBehavedFX), [Flowless](https://github.com/TomasMikula/Flowless), and [UndoFX](https://github.com/TomasMikula/UndoFX)
 * Mikael Grev: [MigLayout](http://www.miglayout.com/)
 * Tom Eugelink: [MigPane](https://github.com/mikaelgrev/miglayout/blob/master/javafx/src/main/java/org/tbee/javafx/scene/layout/fxml/MigPane.java)
 * Jens Deters: [FontAwesomeFX](https://bitbucket.org/Jerady/fontawesomefx)
 * Dieter Holz, [PreferencesFX](https://github.com/dlsc-software-consulting-gmbh/PreferencesFX)
 * David Croft, [File Preferences](http://www.davidc.net/programming/java/java-preferences-using-file-backing-store)
 * Alex Bertram, [Renjin](https://www.renjin.org/)
 * Vladimir Schneider: [flexmark](https://github.com/vsch/flexmark-java)
 * Shy Shalom, Kohei Taketa: [juniversalchardet](https://github.com/takscape/juniversalchardet)

A docs/development/proguard/README.md

 From https://github.com/greenrobot/EventBus#r8-proguard
 	-keepattributes *Annotation*
 	-keepclassmembers class * {
 			@org.greenrobot.eventbus.Subscribe <methods>;
+	}
 	-keep enum org.greenrobot.eventbus.ThreadMode { *; }

A docs/diagram.md

 # Introduction
 From a high level, the application architecture for converting Markdown documents is captured in the following figure:
 ``` diagram-graphviz
 digraph {
   node [fontname = "Noto Sans" fontsize=6 height=.25 penwidth=.5];
   edge [fontname = "Noto Sans" fontsize=6  penwidth=.5 arrowsize=.5];
   node [shape=box color="{{keenwrite.palette.primary.light}}" fontcolor="{{keenwrite.palette.primary.dark}}"]
   edge [color="{{keenwrite.palette.grayscale.light}}" fontcolor="{{keenwrite.palette.grayscale.dark}}"]
   {{keenwrite.classes.processors.variable.definition}} ->   {{keenwrite.classes.processors.markdown}} [xlabel="{{keenwrite.graph.label.chain.next}}  "]
   {{keenwrite.classes.processors.markdown}} -> {{keenwrite.classes.processors.preview}} [xlabel="{{keenwrite.graph.label.chain.next}}  "]
   {{keenwrite.classes.processors.markdown}} -> Extensions [label="  contains"]
 Extensions -> FencedBlockExtension
 Extensions -> CaretExtension
 Extensions -> ImageLinkExtension
 Extensions -> TeXExtension
+}
 ```
 An extension is an addition to the Markdown parser, flexmark-java, that is used when converting the document's abstract syntax tree into an HTML document. The {{keenwrite.classes.processors.markdown}} contains both prepackaged and custom extensions.

A docs/diagram.yaml

 ---
 keenwrite:
   classes:
     processors:
       markdown: MarkdownProcessor
       variable:
         definition: DefinitionProcessor
       preview: PreviewProcessor
   palette:
     primary:
       light: '#51a9cf'
       dark: '#126d95'
     secondary:
       light: '#ec706a'
       dark: '#7e252f'
     accent:
       light: '#76A786'
       dark: '#385742'
     grayscale:
       light: '#bac2c5'
       dark: '#394343'
   graph:
     label:
       chain:
         next: successor

A docs/div.md

 # Fenced divs
 This section describes the syntax to generate HTML `div` elements. The
 syntax is known as a _fenced div_.
 # Basic syntax
 A fenced div has the following basic syntax:
 ``` markdown
 ::: name
 Content
 :::
 ```
 To start a fenced div, begin a line with at least three colons (`:::`),
 followed by at least one space, followed by any word. Content may follow
 immediately on the next line. Terminate the fenced div with at least
 three colons. The terminating colons needn't match in number to the starting
 colons, but it's a good idea to maintain symmetry.
 The HTML that is generated from the above fenced div will resemble:
 ``` html
 <div class="name">
 <p>Content</p>
 </div>
 ```
 # Extended syntax
 A fenced div may use an extended syntax. The extended syntax can provide
 a unique identifier, multiple class names, and key/value data pairs. For
 example:
 ``` markdown
 ::: {#poem-01 .stanza author="Emily Dickinson" year=1890}
 Because I could not stop for Death —
 He kindly stopped for me —
 The Carriage held but just Ourselves —
 And Immortality.
 :::
 ```
 The above snippet produces:
 ``` html
 <div id="poem-01" class="stanza" data-author="Emily Dickinson" data-year="1890">
 <p>Because I could not stop for Death —
 He kindly stopped for me —
 The Carriage held but just Ourselves —
 And Immortality.</p>
 </div>
 ```
 Note that when using the extended syntax, class styles must be prefixed with
 a period (e.g., `.stanza` in the example).
 # Nested syntax
 Fenced divs may be nested, such as in the following example:
 ``` markdown
 ::: poem
 :::::: stanza
 Because I could not stop for Death —
 He kindly stopped for me —
 The Carriage held but just Ourselves —
 And Immortality.
 ::::::
 :::
 ```
 The above example produces:
 ``` html
 <div class="poem"><div class="stanza">
 <p>Because I could not stop for Death —
 He kindly stopped for me —
 The Carriage held but just Ourselves —
 And Immortality.</p>
 </div></div>
 ```

A docs/i18n.md

 # Internationalization
 The application supports internationalization (I18N). There are multiple
 components to editing and previewing internationalized text documents.
 These include:
 * Fonts
 * Language
 Both fonts and language must be set for non-Latin-based text.
 # Fonts
 The text editors and preview panel have independent font settings. For
 all Chinese, Japanese, and Korean (CJK) fonts, you may have to type in
 the font family name directly.
 For example, CJK font families for the editor have the following names:
 * **Noto Sans CJK KR** --- Korean font
 * **Noto Sans CJK JP** --- Japanese font
 * **Noto Sans CJK HN** --- Chinese font
 * **Noto Sans CJK SC** --- Simplified Chinese font
 While CJK font familes for the preview have the following names:
 * **Noto Serif CJK KR** --- Korean font
 * **Noto Serif CJK JP** --- Japanese font
 * **Noto Serif CJK HN** --- Chinese font
 * **Noto Serif CJK SC** --- Simplified Chinese font
 ## Editor
 Complete the following steps to change the editor font:
 . Click **Edit → Preferences**.
 . Click **Fonts**.
 . Click **Change** under **Editor Font**.
 . Find the font name by typing or scrolling.
 . Click the desired font family.
 . Click **OK**.
 . Click **Apply**.
 The text editor font is changed.
 Note the following:
 * The font must be installed in the system for this to work.
 * You may have to edit the font name if it cannot be selected from the list.
 * Setting the editor font also sets the statistics panel font.
 ## Preview
 The preview panel uses regular and monospace fonts.
 ### Regular
 Complete the following steps to change the regular preview font:
 . Click **Edit → Preferences**.
 . Click **Fonts**.
 . Click **Change** under **Preview Font** for the **Preview pane font name**.
 . Find the font name by typing or scrolling.
 . Click the desired font family.
 . Click **OK**.
 . Click **Apply**.
 The regular preview font is changed.
 ### Monospace
 Complete the following steps to change the monospace preview font:
 . Click **Edit → Preferences**.
 . Click **Fonts**.
 . Click **Change** under **Preview Font** for the **Monospace font name**.
 . Find the font name by typing or scrolling.
 . Click the desired font family.
 . Click **OK**.
 . Click **Apply**.
 The monospace font is changed.
 # Language
 Language settings control the locale that the application uses. When using
 a CJK font, for example, the application must also be instructed to use
 a particular locale. Change the locale as follows:
 . Click **Edit → Preferences**.
 . Click **Language**.
 . Select a value for **Locale**.
 . Click **Apply**.
 The language is set.

A docs/images/app-ide.png

Binary file

A docs/images/app-title.png

Binary file

A docs/images/app-title.zh-CN.png

Binary file

A docs/images/architecture/architecture.png

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A docs/licenses/BEAN-VALIDATION-API.md

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A docs/licenses/FILE-PREFERENCES.md

 Released into the Public Domain by David Croft.
 http://www.davidc.net/programming/java/java-preferences-using-file-backing-store
 http://creativecommons.org/publicdomain/zero/1.0/
 CC0 1.0 Universal (CC0 1.0)
 Public Domain Dedication
 This is a human-readable summary of the Legal Code (read the full text).
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 * The person who associated a work with this deed has dedicated the work to the public domain by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
 * You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission. See Other Information below.
 This license is acceptable for Free Cultural Works.
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 * In no way are the patent or trademark rights of any person affected by CC0, nor are the rights that other persons may have in the work or in how the work is used, such as publicity or privacy rights.
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 * When using or citing the work, you should not imply endorsement by the author or the affirmer.

A docs/licenses/FLEXMARK.md

 Copyright (c) 2015-2016, Atlassian Pty Ltd
 All rights reserved.
 Copyright (c) 2016-2018, Vladimir Schneider,
 All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/FLOWLESS.md

 Copyright (c) 2014, TomasMikula
 All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/FONT-AWESOME-FX.txt

                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 . Definitions.
       "License" shall mean the terms and conditions for use, reproduction,
       and distribution as defined by Sections 1 through 9 of this document.
       "Licensor" shall mean the copyright owner or entity authorized by
       the copyright owner that is granting the License.
       "Legal Entity" shall mean the union of the acting entity and all
       other entities that control, are controlled by, or are under common
       control with that entity. For the purposes of this definition,
       "control" means (i) the power, direct or indirect, to cause the
       direction or management of such entity, whether by contract or
       otherwise, or (ii) ownership of fifty percent (50%) or more of the
       outstanding shares, or (iii) beneficial ownership of such entity.
       "You" (or "Your") shall mean an individual or Legal Entity
       exercising permissions granted by this License.
       "Source" form shall mean the preferred form for making modifications,
       including but not limited to software source code, documentation
       source, and configuration files.
       "Object" form shall mean any form resulting from mechanical
       transformation or translation of a Source form, including but
       not limited to compiled object code, generated documentation,
       and conversions to other media types.
       "Work" shall mean the work of authorship, whether in Source or
       Object form, made available under the License, as indicated by a
       copyright notice that is included in or attached to the work
       (an example is provided in the Appendix below).
       "Derivative Works" shall mean any work, whether in Source or Object
       form, that is based on (or derived from) the Work and for which the
       editorial revisions, annotations, elaborations, or other modifications
       represent, as a whole, an original work of authorship. For the purposes
       of this License, Derivative Works shall not include works that remain
       separable from, or merely link (or bind by name) to the interfaces of,
       the Work and Derivative Works thereof.
       "Contribution" shall mean any work of authorship, including
       the original version of the Work and any modifications or additions
       to that Work or Derivative Works thereof, that is intentionally
       submitted to Licensor for inclusion in the Work by the copyright owner
       or by an individual or Legal Entity authorized to submit on behalf of
       the copyright owner. For the purposes of this definition, "submitted"
       means any form of electronic, verbal, or written communication sent
       to the Licensor or its representatives, including but not limited to
       communication on electronic mailing lists, source code control systems,
       and issue tracking systems that are managed by, or on behalf of, the
       Licensor for the purpose of discussing and improving the Work, but
       excluding communication that is conspicuously marked or otherwise
       designated in writing by the copyright owner as "Not a Contribution."
       "Contributor" shall mean Licensor and any individual or Legal Entity
       on behalf of whom a Contribution has been received by Licensor and
       subsequently incorporated within the Work.
 . Grant of Copyright License. Subject to the terms and conditions of
       this License, each Contributor hereby grants to You a perpetual,
       worldwide, non-exclusive, no-charge, royalty-free, irrevocable
       copyright license to reproduce, prepare Derivative Works of,
       publicly display, publicly perform, sublicense, and distribute the
       Work and such Derivative Works in Source or Object form.
 . Grant of Patent License. Subject to the terms and conditions of
       this License, each Contributor hereby grants to You a perpetual,
       worldwide, non-exclusive, no-charge, royalty-free, irrevocable
       (except as stated in this section) patent license to make, have made,
       use, offer to sell, sell, import, and otherwise transfer the Work,
       where such license applies only to those patent claims licensable
       by such Contributor that are necessarily infringed by their
       Contribution(s) alone or by combination of their Contribution(s)
       with the Work to which such Contribution(s) was submitted. If You
       institute patent litigation against any entity (including a
       cross-claim or counterclaim in a lawsuit) alleging that the Work
       or a Contribution incorporated within the Work constitutes direct
       or contributory patent infringement, then any patent licenses
       granted to You under this License for that Work shall terminate
       as of the date such litigation is filed.
 . Redistribution. You may reproduce and distribute copies of the
       Work or Derivative Works thereof in any medium, with or without
       modifications, and in Source or Object form, provided that You
       meet the following conditions:
       (a) You must give any other recipients of the Work or
           Derivative Works a copy of this License; and
       (b) You must cause any modified files to carry prominent notices
           stating that You changed the files; and
       (c) You must retain, in the Source form of any Derivative Works
           that You distribute, all copyright, patent, trademark, and
           attribution notices from the Source form of the Work,
           excluding those notices that do not pertain to any part of
           the Derivative Works; and
       (d) If the Work includes a "NOTICE" text file as part of its
           distribution, then any Derivative Works that You distribute must
           include a readable copy of the attribution notices contained
           within such NOTICE file, excluding those notices that do not
           pertain to any part of the Derivative Works, in at least one
           of the following places: within a NOTICE text file distributed
           as part of the Derivative Works; within the Source form or
           documentation, if provided along with the Derivative Works; or,
           within a display generated by the Derivative Works, if and
           wherever such third-party notices normally appear. The contents
           of the NOTICE file are for informational purposes only and
           do not modify the License. You may add Your own attribution
           notices within Derivative Works that You distribute, alongside
           or as an addendum to the NOTICE text from the Work, provided
           that such additional attribution notices cannot be construed
           as modifying the License.
       You may add Your own copyright statement to Your modifications and
       may provide additional or different license terms and conditions
       for use, reproduction, or distribution of Your modifications, or
       for any such Derivative Works as a whole, provided Your use,
       reproduction, and distribution of the Work otherwise complies with
       the conditions stated in this License.
 . Submission of Contributions. Unless You explicitly state otherwise,
       any Contribution intentionally submitted for inclusion in the Work
       by You to the Licensor shall be under the terms and conditions of
       this License, without any additional terms or conditions.
       Notwithstanding the above, nothing herein shall supersede or modify
       the terms of any separate license agreement you may have executed
       with Licensor regarding such Contributions.
 . Trademarks. This License does not grant permission to use the trade
       names, trademarks, service marks, or product names of the Licensor,
       except as required for reasonable and customary use in describing the
       origin of the Work and reproducing the content of the NOTICE file.
 . Disclaimer of Warranty. Unless required by applicable law or
       agreed to in writing, Licensor provides the Work (and each
       Contributor provides its Contributions) on an "AS IS" BASIS,
       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
       implied, including, without limitation, any warranties or conditions
       of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
       PARTICULAR PURPOSE. You are solely responsible for determining the
       appropriateness of using or redistributing the Work and assume any
       risks associated with Your exercise of permissions under this License.
 . Limitation of Liability. In no event and under no legal theory,
       whether in tort (including negligence), contract, or otherwise,
       unless required by applicable law (such as deliberate and grossly
       negligent acts) or agreed to in writing, shall any Contributor be
       liable to You for damages, including any direct, indirect, special,
       incidental, or consequential damages of any character arising as a
       result of this License or out of the use or inability to use the
       Work (including but not limited to damages for loss of goodwill,
       work stoppage, computer failure or malfunction, or any and all
       other commercial damages or losses), even if such Contributor
       has been advised of the possibility of such damages.
 . Accepting Warranty or Additional Liability. While redistributing
       the Work or Derivative Works thereof, You may choose to offer,
       and charge a fee for, acceptance of support, warranty, indemnity,
       or other liability obligations and/or rights consistent with this
       License. However, in accepting such obligations, You may act only
       on Your own behalf and on Your sole responsibility, not on behalf
       of any other Contributor, and only if You agree to indemnify,
       defend, and hold each Contributor harmless for any liability
       incurred by, or claims asserted against, such Contributor by reason
       of your accepting any such warranty or additional liability.
    END OF TERMS AND CONDITIONS
    APPENDIX: How to apply the Apache License to your work.
       To apply the Apache License to your work, attach the following
       boilerplate notice, with the fields enclosed by brackets "[]"
       replaced with your own identifying information. (Don't include
       the brackets!)  The text should be enclosed in the appropriate
       comment syntax for the file format. We also recommend that a
       file or class name and description of purpose be included on the
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
    Copyright [yyyy] [name of copyright owner]
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
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    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

A docs/licenses/JAVA-IMAGE-SCALING.md

 Java Image Scaling
 Copyright (c) 2013, Morten Nobel-Joergensen
 All rights reserved.
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.  Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 Neither the name of the <ORGANIZATION> nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/JSYMSPELL.md

 MIT License
 Copyright (c) 2019 Raul Garcia
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.

A docs/licenses/JUNIVERSAL-CHARDET.md

 Version: MPL 1.1/GPL 2.0/LGPL 2.1
 The contents of this file are subject to the Mozilla Public License Version
 .1 (the "License"); you may not use this file except in compliance with
 the License. You may obtain a copy of the License at
 http://www.mozilla.org/MPL/
 Software distributed under the License is distributed on an "AS IS" basis,
 WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 for the specific language governing rights and limitations under the
 License.
 The Original Code is Mozilla Universal charset detector code.
 The Initial Developer of the Original Code is
 Netscape Communications Corporation.
 Portions created by the Initial Developer are Copyright (C) 2001
 the Initial Developer. All Rights Reserved.
 Contributor(s):
         Shy Shalom <shooshX@gmail.com>
         Kohei TAKETA <k-tak@void.in> (Java port)
 Alternatively, the contents of this file may be used under the terms of
 either the GNU General Public License Version 2 or later (the "GPL"), or
 the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 in which case the provisions of the GPL or the LGPL are applicable instead
 of those above. If you wish to allow use of your version of this file only
 under the terms of either the GPL or the LGPL, and not to allow others to
 use your version of this file under the terms of the MPL, indicate your
 decision by deleting the provisions above and replace them with the notice
 and other provisions required by the GPL or the LGPL. If you do not delete
 the provisions above, a recipient may use your version of this file under
 the terms of any one of the MPL, the GPL or the LGPL.

A docs/licenses/JWHEATSHEAF.md

 Copyright © 2020 Mark Raynsford <code@io7m.com> http://io7m.com
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted, provided that the above
 copyright notice and this permission notice appear in all copies.
 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

A docs/licenses/MARKDOWN-WRITER-FX.md

 Copyright (c) 2015 Karl Tauber <karl@jformdesigner.com>
 All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/MIG-LAYOUT.md

 Copyright (c) 2000 Mikael Grev
 All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 . Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 . Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 . The name of the author may not be used to endorse or promote products
    derived from this software without specific prior written permission.
 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/PREFERENCES-FX.txt

                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 . Definitions.
       "License" shall mean the terms and conditions for use, reproduction,
       and distribution as defined by Sections 1 through 9 of this document.
       "Licensor" shall mean the copyright owner or entity authorized by
       the copyright owner that is granting the License.
       "Legal Entity" shall mean the union of the acting entity and all
       other entities that control, are controlled by, or are under common
       control with that entity. For the purposes of this definition,
       "control" means (i) the power, direct or indirect, to cause the
       direction or management of such entity, whether by contract or
       otherwise, or (ii) ownership of fifty percent (50%) or more of the
       outstanding shares, or (iii) beneficial ownership of such entity.
       "You" (or "Your") shall mean an individual or Legal Entity
       exercising permissions granted by this License.
       "Source" form shall mean the preferred form for making modifications,
       including but not limited to software source code, documentation
       source, and configuration files.
       "Object" form shall mean any form resulting from mechanical
       transformation or translation of a Source form, including but
       not limited to compiled object code, generated documentation,
       and conversions to other media types.
       "Work" shall mean the work of authorship, whether in Source or
       Object form, made available under the License, as indicated by a
       copyright notice that is included in or attached to the work
       (an example is provided in the Appendix below).
       "Derivative Works" shall mean any work, whether in Source or Object
       form, that is based on (or derived from) the Work and for which the
       editorial revisions, annotations, elaborations, or other modifications
       represent, as a whole, an original work of authorship. For the purposes
       of this License, Derivative Works shall not include works that remain
       separable from, or merely link (or bind by name) to the interfaces of,
       the Work and Derivative Works thereof.
       "Contribution" shall mean any work of authorship, including
       the original version of the Work and any modifications or additions
       to that Work or Derivative Works thereof, that is intentionally
       submitted to Licensor for inclusion in the Work by the copyright owner
       or by an individual or Legal Entity authorized to submit on behalf of
       the copyright owner. For the purposes of this definition, "submitted"
       means any form of electronic, verbal, or written communication sent
       to the Licensor or its representatives, including but not limited to
       communication on electronic mailing lists, source code control systems,
       and issue tracking systems that are managed by, or on behalf of, the
       Licensor for the purpose of discussing and improving the Work, but
       excluding communication that is conspicuously marked or otherwise
       designated in writing by the copyright owner as "Not a Contribution."
       "Contributor" shall mean Licensor and any individual or Legal Entity
       on behalf of whom a Contribution has been received by Licensor and
       subsequently incorporated within the Work.
 . Grant of Copyright License. Subject to the terms and conditions of
       this License, each Contributor hereby grants to You a perpetual,
       worldwide, non-exclusive, no-charge, royalty-free, irrevocable
       copyright license to reproduce, prepare Derivative Works of,
       publicly display, publicly perform, sublicense, and distribute the
       Work and such Derivative Works in Source or Object form.
 . Grant of Patent License. Subject to the terms and conditions of
       this License, each Contributor hereby grants to You a perpetual,
       worldwide, non-exclusive, no-charge, royalty-free, irrevocable
       (except as stated in this section) patent license to make, have made,
       use, offer to sell, sell, import, and otherwise transfer the Work,
       where such license applies only to those patent claims licensable
       by such Contributor that are necessarily infringed by their
       Contribution(s) alone or by combination of their Contribution(s)
       with the Work to which such Contribution(s) was submitted. If You
       institute patent litigation against any entity (including a
       cross-claim or counterclaim in a lawsuit) alleging that the Work
       or a Contribution incorporated within the Work constitutes direct
       or contributory patent infringement, then any patent licenses
       granted to You under this License for that Work shall terminate
       as of the date such litigation is filed.
 . Redistribution. You may reproduce and distribute copies of the
       Work or Derivative Works thereof in any medium, with or without
       modifications, and in Source or Object form, provided that You
       meet the following conditions:
       (a) You must give any other recipients of the Work or
           Derivative Works a copy of this License; and
       (b) You must cause any modified files to carry prominent notices
           stating that You changed the files; and
       (c) You must retain, in the Source form of any Derivative Works
           that You distribute, all copyright, patent, trademark, and
           attribution notices from the Source form of the Work,
           excluding those notices that do not pertain to any part of
           the Derivative Works; and
       (d) If the Work includes a "NOTICE" text file as part of its
           distribution, then any Derivative Works that You distribute must
           include a readable copy of the attribution notices contained
           within such NOTICE file, excluding those notices that do not
           pertain to any part of the Derivative Works, in at least one
           of the following places: within a NOTICE text file distributed
           as part of the Derivative Works; within the Source form or
           documentation, if provided along with the Derivative Works; or,
           within a display generated by the Derivative Works, if and
           wherever such third-party notices normally appear. The contents
           of the NOTICE file are for informational purposes only and
           do not modify the License. You may add Your own attribution
           notices within Derivative Works that You distribute, alongside
           or as an addendum to the NOTICE text from the Work, provided
           that such additional attribution notices cannot be construed
           as modifying the License.
       You may add Your own copyright statement to Your modifications and
       may provide additional or different license terms and conditions
       for use, reproduction, or distribution of Your modifications, or
       for any such Derivative Works as a whole, provided Your use,
       reproduction, and distribution of the Work otherwise complies with
       the conditions stated in this License.
 . Submission of Contributions. Unless You explicitly state otherwise,
       any Contribution intentionally submitted for inclusion in the Work
       by You to the Licensor shall be under the terms and conditions of
       this License, without any additional terms or conditions.
       Notwithstanding the above, nothing herein shall supersede or modify
       the terms of any separate license agreement you may have executed
       with Licensor regarding such Contributions.
 . Trademarks. This License does not grant permission to use the trade
       names, trademarks, service marks, or product names of the Licensor,
       except as required for reasonable and customary use in describing the
       origin of the Work and reproducing the content of the NOTICE file.
 . Disclaimer of Warranty. Unless required by applicable law or
       agreed to in writing, Licensor provides the Work (and each
       Contributor provides its Contributions) on an "AS IS" BASIS,
       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
       implied, including, without limitation, any warranties or conditions
       of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
       PARTICULAR PURPOSE. You are solely responsible for determining the
       appropriateness of using or redistributing the Work and assume any
       risks associated with Your exercise of permissions under this License.
 . Limitation of Liability. In no event and under no legal theory,
       whether in tort (including negligence), contract, or otherwise,
       unless required by applicable law (such as deliberate and grossly
       negligent acts) or agreed to in writing, shall any Contributor be
       liable to You for damages, including any direct, indirect, special,
       incidental, or consequential damages of any character arising as a
       result of this License or out of the use or inability to use the
       Work (including but not limited to damages for loss of goodwill,
       work stoppage, computer failure or malfunction, or any and all
       other commercial damages or losses), even if such Contributor
       has been advised of the possibility of such damages.
 . Accepting Warranty or Additional Liability. While redistributing
       the Work or Derivative Works thereof, You may choose to offer,
       and charge a fee for, acceptance of support, warranty, indemnity,
       or other liability obligations and/or rights consistent with this
       License. However, in accepting such obligations, You may act only
       on Your own behalf and on Your sole responsibility, not on behalf
       of any other Contributor, and only if You agree to indemnify,
       defend, and hold each Contributor harmless for any liability
       incurred by, or claims asserted against, such Contributor by reason
       of your accepting any such warranty or additional liability.
    END OF TERMS AND CONDITIONS
    APPENDIX: How to apply the Apache License to your work.
       To apply the Apache License to your work, attach the following
       boilerplate notice, with the fields enclosed by brackets "{}"
       replaced with your own identifying information. (Don't include
       the brackets!)  The text should be enclosed in the appropriate
       comment syntax for the file format. We also recommend that a
       file or class name and description of purpose be included on the
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
    Copyright {yyyy} {name of copyright owner}
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
        http://www.apache.org/licenses/LICENSE-2.0
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

A docs/licenses/REACT-FX.md

 Copyright (c) 2013-2014, Tomas Mikula
 All rights reserved.
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 . Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 . Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/RENJIN.txt

 		    GNU GENERAL PUBLIC LICENSE
 		       Version 2, June 1991
  Copyright (C) 1989, 1991 Free Software Foundation, Inc.
 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 			    Preamble
   The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
 License is intended to guarantee your freedom to share and change free
 software--to make sure the software is free for all its users.  This
 General Public License applies to most of the Free Software
 Foundation's software and to any other program whose authors commit to
 using it.  (Some other Free Software Foundation software is covered by
 the GNU Library General Public License instead.)  You can apply it to
 your programs, too.
   When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
 have the freedom to distribute copies of free software (and charge for
 this service if you wish), that you receive source code or can get it
 if you want it, that you can change the software or use pieces of it
 in new free programs; and that you know you can do these things.
   To protect your rights, we need to make restrictions that forbid
 anyone to deny you these rights or to ask you to surrender the rights.
 These restrictions translate to certain responsibilities for you if you
 distribute copies of the software, or if you modify it.
   For example, if you distribute copies of such a program, whether
 gratis or for a fee, you must give the recipients all the rights that
 you have.  You must make sure that they, too, receive or can get the
 source code.  And you must show them these terms so they know their
 rights.
   We protect your rights with two steps: (1) copyright the software, and
 (2) offer you this license which gives you legal permission to copy,
 distribute and/or modify the software.
   Also, for each author's protection and ours, we want to make certain
 that everyone understands that there is no warranty for this free
 software.  If the software is modified by someone else and passed on, we
 want its recipients to know that what they have is not the original, so
 that any problems introduced by others will not reflect on the original
 authors' reputations.
   Finally, any free program is threatened constantly by software
 patents.  We wish to avoid the danger that redistributors of a free
 program will individually obtain patent licenses, in effect making the
 program proprietary.  To prevent this, we have made it clear that any
 patent must be licensed for everyone's free use or not licensed at all.
   The precise terms and conditions for copying, distribution and
 modification follow.
 		    GNU GENERAL PUBLIC LICENSE
    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 . This License applies to any program or other work which contains
 a notice placed by the copyright holder saying it may be distributed
 under the terms of this General Public License.  The "Program", below,
 refers to any such program or work, and a "work based on the Program"
 means either the Program or any derivative work under copyright law:
 that is to say, a work containing the Program or a portion of it,
 either verbatim or with modifications and/or translated into another
 language.  (Hereinafter, translation is included without limitation in
 the term "modification".)  Each licensee is addressed as "you".
 Activities other than copying, distribution and modification are not
 covered by this License; they are outside its scope.  The act of
 running the Program is not restricted, and the output from the Program
 is covered only if its contents constitute a work based on the
 Program (independent of having been made by running the Program).
 Whether that is true depends on what the Program does.
 . You may copy and distribute verbatim copies of the Program's
 source code as you receive it, in any medium, provided that you
 conspicuously and appropriately publish on each copy an appropriate
 copyright notice and disclaimer of warranty; keep intact all the
 notices that refer to this License and to the absence of any warranty;
 and give any other recipients of the Program a copy of this License
 along with the Program.
 You may charge a fee for the physical act of transferring a copy, and
 you may at your option offer warranty protection in exchange for a fee.
 . You may modify your copy or copies of the Program or any portion
 of it, thus forming a work based on the Program, and copy and
 distribute such modifications or work under the terms of Section 1
 above, provided that you also meet all of these conditions:
     a) You must cause the modified files to carry prominent notices
     stating that you changed the files and the date of any change.
     b) You must cause any work that you distribute or publish, that in
     whole or in part contains or is derived from the Program or any
     part thereof, to be licensed as a whole at no charge to all third
     parties under the terms of this License.
     c) If the modified program normally reads commands interactively
     when run, you must cause it, when started running for such
     interactive use in the most ordinary way, to print or display an
     announcement including an appropriate copyright notice and a
     notice that there is no warranty (or else, saying that you provide
     a warranty) and that users may redistribute the program under
     these conditions, and telling the user how to view a copy of this
     License.  (Exception: if the Program itself is interactive but
     does not normally print such an announcement, your work based on
     the Program is not required to print an announcement.)
 These requirements apply to the modified work as a whole.  If
 identifiable sections of that work are not derived from the Program,
 and can be reasonably considered independent and separate works in
 themselves, then this License, and its terms, do not apply to those
 sections when you distribute them as separate works.  But when you
 distribute the same sections as part of a whole which is a work based
 on the Program, the distribution of the whole must be on the terms of
 this License, whose permissions for other licensees extend to the
 entire whole, and thus to each and every part regardless of who wrote it.
 Thus, it is not the intent of this section to claim rights or contest
 your rights to work written entirely by you; rather, the intent is to
 exercise the right to control the distribution of derivative or
 collective works based on the Program.
 In addition, mere aggregation of another work not based on the Program
 with the Program (or with a work based on the Program) on a volume of
 a storage or distribution medium does not bring the other work under
 the scope of this License.
 . You may copy and distribute the Program (or a work based on it,
 under Section 2) in object code or executable form under the terms of
 Sections 1 and 2 above provided that you also do one of the following:
     a) Accompany it with the complete corresponding machine-readable
     source code, which must be distributed under the terms of Sections
 and 2 above on a medium customarily used for software interchange; or,
     b) Accompany it with a written offer, valid for at least three
     years, to give any third party, for a charge no more than your
     cost of physically performing source distribution, a complete
     machine-readable copy of the corresponding source code, to be
     distributed under the terms of Sections 1 and 2 above on a medium
     customarily used for software interchange; or,
     c) Accompany it with the information you received as to the offer
     to distribute corresponding source code.  (This alternative is
     allowed only for noncommercial distribution and only if you
     received the program in object code or executable form with such
     an offer, in accord with Subsection b above.)
 The source code for a work means the preferred form of the work for
 making modifications to it.  For an executable work, complete source
 code means all the source code for all modules it contains, plus any
 associated interface definition files, plus the scripts used to
 control compilation and installation of the executable.  However, as a
 special exception, the source code distributed need not include
 anything that is normally distributed (in either source or binary
 form) with the major components (compiler, kernel, and so on) of the
 operating system on which the executable runs, unless that component
 itself accompanies the executable.
 If distribution of executable or object code is made by offering
 access to copy from a designated place, then offering equivalent
 access to copy the source code from the same place counts as
 distribution of the source code, even though third parties are not
 compelled to copy the source along with the object code.
 . You may not copy, modify, sublicense, or distribute the Program
 except as expressly provided under this License.  Any attempt
 otherwise to copy, modify, sublicense or distribute the Program is
 void, and will automatically terminate your rights under this License.
 However, parties who have received copies, or rights, from you under
 this License will not have their licenses terminated so long as such
 parties remain in full compliance.
 . You are not required to accept this License, since you have not
 signed it.  However, nothing else grants you permission to modify or
 distribute the Program or its derivative works.  These actions are
 prohibited by law if you do not accept this License.  Therefore, by
 modifying or distributing the Program (or any work based on the
 Program), you indicate your acceptance of this License to do so, and
 all its terms and conditions for copying, distributing or modifying
 the Program or works based on it.
 . Each time you redistribute the Program (or any work based on the
 Program), the recipient automatically receives a license from the
 original licensor to copy, distribute or modify the Program subject to
 these terms and conditions.  You may not impose any further
 restrictions on the recipients' exercise of the rights granted herein.
 You are not responsible for enforcing compliance by third parties to
 this License.
 . If, as a consequence of a court judgment or allegation of patent
 infringement or for any other reason (not limited to patent issues),
 conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
 excuse you from the conditions of this License.  If you cannot
 distribute so as to satisfy simultaneously your obligations under this
 License and any other pertinent obligations, then as a consequence you
 may not distribute the Program at all.  For example, if a patent
 license would not permit royalty-free redistribution of the Program by
 all those who receive copies directly or indirectly through you, then
 the only way you could satisfy both it and this License would be to
 refrain entirely from distribution of the Program.
 If any portion of this section is held invalid or unenforceable under
 any particular circumstance, the balance of the section is intended to
 apply and the section as a whole is intended to apply in other
 circumstances.
 It is not the purpose of this section to induce you to infringe any
 patents or other property right claims or to contest validity of any
 such claims; this section has the sole purpose of protecting the
 integrity of the free software distribution system, which is
 implemented by public license practices.  Many people have made
 generous contributions to the wide range of software distributed
 through that system in reliance on consistent application of that
 system; it is up to the author/donor to decide if he or she is willing
 to distribute software through any other system and a licensee cannot
 impose that choice.
 This section is intended to make thoroughly clear what is believed to
 be a consequence of the rest of this License.
 . If the distribution and/or use of the Program is restricted in
 certain countries either by patents or by copyrighted interfaces, the
 original copyright holder who places the Program under this License
 may add an explicit geographical distribution limitation excluding
 those countries, so that distribution is permitted only in or among
 countries not thus excluded.  In such case, this License incorporates
 the limitation as if written in the body of this License.
 . The Free Software Foundation may publish revised and/or new versions
 of the General Public License from time to time.  Such new versions will
 be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
 Each version is given a distinguishing version number.  If the Program
 specifies a version number of this License which applies to it and "any
 later version", you have the option of following the terms and conditions
 either of that version or of any later version published by the Free
 Software Foundation.  If the Program does not specify a version number of
 this License, you may choose any version ever published by the Free Software
 Foundation.
 . If you wish to incorporate parts of the Program into other free
 programs whose distribution conditions are different, write to the author
 to ask for permission.  For software which is copyrighted by the Free
 Software Foundation, write to the Free Software Foundation; we sometimes
 make exceptions for this.  Our decision will be guided by the two goals
 of preserving the free status of all derivatives of our free software and
 of promoting the sharing and reuse of software generally.
 			    NO WARRANTY
 . BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
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 REPAIR OR CORRECTION.
 . IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGES.
 		     END OF TERMS AND CONDITIONS
 	    How to Apply These Terms to Your New Programs
   If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
   To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
 convey the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
     <one line to give the program's name and a brief idea of what it does.>
     Copyright (C) <year>  <name of author>
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 Also add information on how to contact you by electronic and paper mail.
 If the program is interactive, make it output a short notice like this
 when it starts in an interactive mode:
     Gnomovision version 69, Copyright (C) year name of author
     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type `show c' for details.
 The hypothetical commands `show w' and `show c' should show the appropriate
 parts of the General Public License.  Of course, the commands you use may
 be called something other than `show w' and `show c'; they could even be
 mouse-clicks or menu items--whatever suits your program.
 You should also get your employer (if you work as a programmer) or your
 school, if any, to sign a "copyright disclaimer" for the program, if
 necessary.  Here is a sample; alter the names:
   Yoyodyne, Inc., hereby disclaims all copyright interest in the program
   `Gnomovision' (which makes passes at compilers) written by James Hacker.
   <signature of Ty Coon>, 1 April 1989
   Ty Coon, President of Vice
 This General Public License does not permit incorporating your program into
 proprietary programs.  If your program is a subroutine library, you may
 consider it more useful to permit linking proprietary applications with the
 library.  If this is what you want to do, use the GNU Library General
 Public License instead of this License.

A docs/licenses/RICH-TEXT-FX.md

 Copyright (c) 2013-2017, Tomas Mikula and contributors
 All rights reserved.
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 . Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 . Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/UNDO-FX.md

 Copyright (c) 2014, TomasMikula
 All rights reserved.
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this
   list of conditions and the following disclaimer in the documentation and/or
   other materials provided with the distribution.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/WELL-BEHAVED-FX.md

 Copyright (c) 2014, TomasMikula
 All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

A docs/licenses/fonts/NOTO-CJK.md

 URL: https://github.com/googlefonts/noto-cjk
 Version: 1.002 or later
 License: SIL Open Font License v1.1
 License File: LICENSE
 Note: prior releases of the CJK fonts were issued under the Apache 2
 license. This was changed to the SIL OFL v1.1 starting with Version 1.002.
 Description:
 Noto CJK fonts, supporting Simplified Chinese, Traditional Chinese,
 Japanese, and Korean. The supported scripts are Han, Hiragana, Katakana,
 Hangul, and Bopomofo. Latin, Greek, Cyrillic, and various symbols are also
 supported for compatibility with CJK standards.
 The fonts in this directory are developed by Google and Adobe and are
 released as open source under the Apache license version 2.0. The copyright
 is held by Adobe, while the trademarks on the names are held by Google.
 A README-formats file has been added explaining the different formats
 provided and their features and limitations.

A docs/licenses/fonts/NOTO-SANS.md

                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 . Definitions.
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       with Licensor regarding such Contributions.
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 . Limitation of Liability. In no event and under no legal theory,
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       Work (including but not limited to damages for loss of goodwill,
       work stoppage, computer failure or malfunction, or any and all
       other commercial damages or losses), even if such Contributor
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 . Accepting Warranty or Additional Liability. While redistributing
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    END OF TERMS AND CONDITIONS
    APPENDIX: How to apply the Apache License to your work.
       To apply the Apache License to your work, attach the following
       boilerplate notice, with the fields enclosed by brackets "[]"
       replaced with your own identifying information. (Don't include
       the brackets!)  The text should be enclosed in the appropriate
       comment syntax for the file format. We also recommend that a
       file or class name and description of purpose be included on the
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
    Copyright [yyyy] [name of copyright owner]
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
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    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

A docs/licenses/fonts/NOTO.md

 Copyright 2018 The Noto Project Authors (https://github.com/googlei18n/noto-fonts)
 This Font Software is licensed under the SIL Open Font License,
 Version 1.1.
 This license is copied below, and is also available with a FAQ at:
 http://scripts.sil.org/OFL
 -----------------------------------------------------------
 SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
 -----------------------------------------------------------
 PREAMBLE
 The goals of the Open Font License (OFL) are to stimulate worldwide
 development of collaborative font projects, to support the font
 creation efforts of academic and linguistic communities, and to
 provide a free and open framework in which fonts may be shared and
 improved in partnership with others.
 The OFL allows the licensed fonts to be used, studied, modified and
 redistributed freely as long as they are not sold by themselves. The
 fonts, including any derivative works, can be bundled, embedded,
 redistributed and/or sold with any software provided that any reserved
 names are not used by derivative works. The fonts and derivatives,
 however, cannot be released under any other type of license. The
 requirement for fonts to remain under this license does not apply to
 any document created using the fonts or their derivatives.
 DEFINITIONS
 "Font Software" refers to the set of files released by the Copyright
 Holder(s) under this license and clearly marked as such. This may
 include source files, build scripts and documentation.
 "Reserved Font Name" refers to any names specified as such after the
 copyright statement(s).
 "Original Version" refers to the collection of Font Software
 components as distributed by the Copyright Holder(s).
 "Modified Version" refers to any derivative made by adding to,
 deleting, or substituting -- in part or in whole -- any of the
 components of the Original Version, by changing formats or by porting
 the Font Software to a new environment.
 "Author" refers to any designer, engineer, programmer, technical
 writer or other person who contributed to the Font Software.
 PERMISSION & CONDITIONS
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of the Font Software, to use, study, copy, merge, embed,
 modify, redistribute, and sell modified and unmodified copies of the
 Font Software, subject to the following conditions:
 ) Neither the Font Software nor any of its individual components, in
 Original or Modified Versions, may be sold by itself.
 ) Original or Modified Versions of the Font Software may be bundled,
 redistributed and/or sold with any software, provided that each copy
 contains the above copyright notice and this license. These can be
 included either as stand-alone text files, human-readable headers or
 in the appropriate machine-readable metadata fields within text or
 binary files as long as those fields can be easily viewed by the user.
 ) No Modified Version of the Font Software may use the Reserved Font
 Name(s) unless explicit written permission is granted by the
 corresponding Copyright Holder. This restriction only applies to the
 primary font name as presented to the users.
 ) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
 Software shall not be used to promote, endorse or advertise any
 Modified Version, except to acknowledge the contribution(s) of the
 Copyright Holder(s) and the Author(s) or with their explicit written
 permission.
 ) The Font Software, modified or unmodified, in part or in whole,
 must be distributed entirely under this license, and must not be
 distributed under any other license. The requirement for fonts to
 remain under this license does not apply to any document created using
 the Font Software.
 TERMINATION
 This license becomes null and void if any of the above conditions are
 not met.
 DISCLAIMER
 THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
 OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
 COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
 DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
 OTHER DEALINGS IN THE FONT SOFTWARE.

A docs/licenses/fonts/SOURCE-CODE-PRO.md

 Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries.
 This Font Software is licensed under the SIL Open Font License, Version 1.1.
 This license is copied below, and is also available with a FAQ at:
 http://scripts.sil.org/OFL
 -----------------------------------------------------------
 SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
 -----------------------------------------------------------
 PREAMBLE
 The goals of the Open Font License (OFL) are to stimulate worldwide
 development of collaborative font projects, to support the font creation
 efforts of academic and linguistic communities, and to provide a free and
 open framework in which fonts may be shared and improved in partnership
 with others.
 The OFL allows the licensed fonts to be used, studied, modified and
 redistributed freely as long as they are not sold by themselves. The
 fonts, including any derivative works, can be bundled, embedded,
 redistributed and/or sold with any software provided that any reserved
 names are not used by derivative works. The fonts and derivatives,
 however, cannot be released under any other type of license. The
 requirement for fonts to remain under this license does not apply
 to any document created using the fonts or their derivatives.
 DEFINITIONS
 "Font Software" refers to the set of files released by the Copyright
 Holder(s) under this license and clearly marked as such. This may
 include source files, build scripts and documentation.
 "Reserved Font Name" refers to any names specified as such after the
 copyright statement(s).
 "Original Version" refers to the collection of Font Software components as
 distributed by the Copyright Holder(s).
 "Modified Version" refers to any derivative made by adding to, deleting,
 or substituting -- in part or in whole -- any of the components of the
 Original Version, by changing formats or by porting the Font Software to a
 new environment.
 "Author" refers to any designer, engineer, programmer, technical
 writer or other person who contributed to the Font Software.
 PERMISSION & CONDITIONS
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of the Font Software, to use, study, copy, merge, embed, modify,
 redistribute, and sell modified and unmodified copies of the Font
 Software, subject to the following conditions:
 ) Neither the Font Software nor any of its individual components,
 in Original or Modified Versions, may be sold by itself.
 ) Original or Modified Versions of the Font Software may be bundled,
 redistributed and/or sold with any software, provided that each copy
 contains the above copyright notice and this license. These can be
 included either as stand-alone text files, human-readable headers or
 in the appropriate machine-readable metadata fields within text or
 binary files as long as those fields can be easily viewed by the user.
 ) No Modified Version of the Font Software may use the Reserved Font
 Name(s) unless explicit written permission is granted by the corresponding
 Copyright Holder. This restriction only applies to the primary font name as
 presented to the users.
 ) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
 Software shall not be used to promote, endorse or advertise any
 Modified Version, except to acknowledge the contribution(s) of the
 Copyright Holder(s) and the Author(s) or with their explicit written
 permission.
 ) The Font Software, modified or unmodified, in part or in whole,
 must be distributed entirely under this license, and must not be
 distributed under any other license. The requirement for fonts to
 remain under this license does not apply to any document created
 using the Font Software.
 TERMINATION
 This license becomes null and void if any of the above conditions are
 not met.
 DISCLAIMER
 THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
 OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
 COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
 DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
 OTHER DEALINGS IN THE FONT SOFTWARE.

A docs/licenses/fonts/SOURCE-SERIF-4.md

 Copyright 2014-2019 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
 This Font Software is licensed under the SIL Open Font License, Version 1.1.
 This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL
 -----------------------------------------------------------
 SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
 -----------------------------------------------------------
 PREAMBLE
 The goals of the Open Font License (OFL) are to stimulate worldwide
 development of collaborative font projects, to support the font creation
 efforts of academic and linguistic communities, and to provide a free and
 open framework in which fonts may be shared and improved in partnership
 with others.
 The OFL allows the licensed fonts to be used, studied, modified and
 redistributed freely as long as they are not sold by themselves. The
 fonts, including any derivative works, can be bundled, embedded,
 redistributed and/or sold with any software provided that any reserved
 names are not used by derivative works. The fonts and derivatives,
 however, cannot be released under any other type of license. The
 requirement for fonts to remain under this license does not apply
 to any document created using the fonts or their derivatives.
 DEFINITIONS
 "Font Software" refers to the set of files released by the Copyright
 Holder(s) under this license and clearly marked as such. This may
 include source files, build scripts and documentation.
 "Reserved Font Name" refers to any names specified as such after the
 copyright statement(s).
 "Original Version" refers to the collection of Font Software components as
 distributed by the Copyright Holder(s).
 "Modified Version" refers to any derivative made by adding to, deleting,
 or substituting -- in part or in whole -- any of the components of the
 Original Version, by changing formats or by porting the Font Software to a
 new environment.
 "Author" refers to any designer, engineer, programmer, technical
 writer or other person who contributed to the Font Software.
 PERMISSION & CONDITIONS
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of the Font Software, to use, study, copy, merge, embed, modify,
 redistribute, and sell modified and unmodified copies of the Font
 Software, subject to the following conditions:
 ) Neither the Font Software nor any of its individual components,
 in Original or Modified Versions, may be sold by itself.
 ) Original or Modified Versions of the Font Software may be bundled,
 redistributed and/or sold with any software, provided that each copy
 contains the above copyright notice and this license. These can be
 included either as stand-alone text files, human-readable headers or
 in the appropriate machine-readable metadata fields within text or
 binary files as long as those fields can be easily viewed by the user.
 ) No Modified Version of the Font Software may use the Reserved Font
 Name(s) unless explicit written permission is granted by the corresponding
 Copyright Holder. This restriction only applies to the primary font name as
 presented to the users.
 ) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
 Software shall not be used to promote, endorse or advertise any
 Modified Version, except to acknowledge the contribution(s) of the
 Copyright Holder(s) and the Author(s) or with their explicit written
 permission.
 ) The Font Software, modified or unmodified, in part or in whole,
 must be distributed entirely under this license, and must not be
 distributed under any other license. The requirement for fonts to
 remain under this license does not apply to any document created
 using the Font Software.
 TERMINATION
 This license becomes null and void if any of the above conditions are
 not met.
 DISCLAIMER
 THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
 OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
 COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
 DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
 OTHER DEALINGS IN THE FONT SOFTWARE.

A docs/logo/font.txt

 Merriweather Sans ExtraBold Italic
 https://github.com/SorkinType/Merriweather-Sans/blob/master/fonts/otf/MerriweatherSans-ExtraBoldItalic.otf
 Weight 800
 https://fonts.google.com/specimen/Merriweather+Sans

A docs/logo/logo-original.svg

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A docs/logo/logo-text.svg

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A docs/logo/logo-text.zh-CN.svg

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A docs/logo/palette.txt

 Blues
   Light - 51a9cf
   Dark - 126d95
 Red & Yellow
   Light yellow - ecd980
   Light red - ec706a
   Dark red - 7e252f
 Greens
   Light - 76A786
   Dark - 385742
 Grayscale
   Light - bac2c5
   Dark - 394343

A docs/metadata.md

 # Document metadata
 Document metadata is information about a document. Metadata often includes
 a title, author name, copyright date, and keywords.
 # Custom metadata
 The following screenshot shows example metadata preferences:
 ![Metadata screenshot](images/screenshots/09.png)
 The **Key** column lists metadata names and the **Value** column lists
 the metadata content for each corresponding **Key**. The content may
 include references to variable definitions. When the document is typeset,
 the values for the variables will be substituted upon export.
 When the document is exported as XHTML, the header will include the
 keys and values conforming to the XHTML specification. For example:
 ``` html
 <head>
   <title>Document Title</title>
   <meta content="science, nature" name="keywords"/>
   <meta content="Penn Surnom" name="author"/>
   <meta content="4311" name="count"/>
 </head>
 ```
 # Special metadata
 When exporting the document, note the following special metadata:
 * **author** -- Included as PDF metadata
 * **byline** -- Replaces author in PDF metadata (e.g., for pen names)
 * **count** -- Total word count in document, automatically included
 * **keywords** -- Included as PDF metadata
 * **title** -- Included as a `<title>` tag, rather than a `<meta>` tag

A docs/r/INSTALL.md

 # R Functions
 Import the files in this directory into the application, which include:
 * bootstrap.R
 * pluralize.R
 * possessive.R
 * conversion.R
 * csv.R
 # bootstrap.R
 Copy the contents of `bootstrap.R` into the R script preferences, shown in the
 following figure, then restart the application:
 # ![Bootstrap](images/bootstrap.png)
 Setting the **Working Directory** allows the startup script to load files
 using a relative to said directory.
 # pluralize.R
 This file defines a function that implements most of Damian Conway's [An Algorithmic Approach to English Pluralization](http://blob.perl.org/tpc/1998/User_Applications/Algorithmic%20Approach%20Plurals/Algorithmic_Plurals.html).
 ## Usage
 Example usages of the pluralize function include:
     `r#pluralize( "mouse" )` - mice
     `r#pluralize( "buzz" )` - buzzes
     `r#pluralize( "bus" )` - buses
 # possessive.R
 This file defines a function that applies possessives to English words.
 ## Usage
 Example usages of the possessive function include:
     `r#pos( "Ross" )` - Ross'
     `r#pos( "Ruby" )` - Ruby's
     `r#pos( "Lois" )` - Lois'
     `r#pos( "my" )` - mine
     `r#pos( "Your" )` - Yours

A docs/r/README.md

 # R Scripts
 These scripts illustrate how R can perform calculations using variables, to help automate repetitive tasks. Authors are free to write their own scripts.
 ## Configuration
 Configure the editor to use scripts as follows:
 . Copy the R scripts into same directory as your Markdown files.
 . Start the editor.
 . Click **Tools → R Script**.
 . Copy and paste the following:
         assign( 'anchor', as.Date( '$date.anchor$', format='%Y-%m-%d' ), envir = .GlobalEnv );
         setwd( '$application.r.working.directory$' );
         source( 'pluralize.R' );
         source( 'csv.R' );
         source( 'conversion.R' );
 . Click **File → New** to create a new file.
 . Click **File → Save As** to set a filename.
 . Set **Name** to: `variables.yaml`
 . Click **OK**.
 . Paste the following definitions:
         date:
           anchor: 2017-01-01
         editor:
           examples:
             season: 2017-09-02
             math:
               x: 1
               y: $editor.examples.math.x$ + 1
               z: $editor.examples.math.y$ + 1
             name:
               given: Josephene
 . Save and close the file.
 . Click **File → Open**
 . Change **Markdown Files** to **Definition Files**.
 . Select `variables.yaml`.
 . Click **Open**.
 R functionality is configured.
 ## Definitions
 The variables definitions within `variables.yaml` are available to R using the R syntax. An additional variable, `application.r.working.directory` is added to the list of variables. The value is set to the working directory of the file being edited. Hover the mouse cursor over the file tab in the editor to see the full path to the file.
 ## Examples
 This section demonstrates how to use the R functions when editing. Complete the following steps to begin:
 . Click **File → New** to create a new file.
 . Click **File → Save As** to set a filename.
 . Set **Name** to: `example.Rmd`
 . Click **OK**.
 The examples are ready for use within the editor.
 ### Arithmetic
 Type the following to perform a simple calculation:
     `r# 1+1`
 The preview pane shows `2.0`.
 ### Functions
 Call the [format](https://stat.ethz.ch/R-manual/R-devel/library/base/html/format.html) function to truncate unwanted decimal places as follows:
     `r# format(1+1,digits=1)`
 The preview pane shows `2`.
 ### Pluralize
 Many English words can be pluralized as follows:
     `r# pl('wolf',2)`
 The preview pane shows `wolves`. The `pluralize.R` file contains a partial implementation of Damian Conway's algorithmic approach to English pluralization.
 ### Chicago Manual of Style
 Apply the Chicago Manual of Style for words less than one-hundred as follows:
        `r# cms(1)` `r# cms(99)` `r# cms(101)`
 The preview pane shows numbers written out as `one` and `ninety-nine`, followed by the digits 101.
 ### Data Import
 Import and display information from a CSV file as follows:
 . Click **File → New** to create a new file.
 . Click **File → Save As** to rename the file.
 . Set the filename to: `data.csv`
 . Paste the following into `data.csv`:
         Animal,Quantity,Country
         Aardwolf,1,Africa
         Keel-billed toucan,1,Belize
         Beaver,2,Canada
         Mute swan,3,Denmark
         Lion,5,Ethiopia
         Brown bear,8,Finland
         Dolphin,13,Greece
         Turul,21,Hungary
         Gyrfalcon,34,Iceland
         Red-billed streamertail,55,Jamaica
 . Click the `example.Rmd` tab.
 . Type the following:
        `r# csv2md('data.csv',total=F)`
 . Type the following to calculate a total for all numeric columns:
        `r# csv2md('data.csv')`
 This imports the data from an external file and formats the information into a table, automatically. Update the data as follows:
 . Click the `data.csv` tab to edit the data.
 . Change the data by adding a new row.
 . Save the file.
 . Click the `example.Rmd` tab.
 The preview pane shows the revised contents.
 ### Elapsed Time
 The duration of a timeline, given in numbers of days, can be computed into English as follows:
     `r# elapsed(1,1)`
 The preview pane shows `same day`. Change the expression to:
     `r# elapsed(1,2)`
 The preview pane shows `one day`. Change the expression to:
     `r# elapsed(1,112358)`
 The preview pane shows `307 years, seven months, and sixteen days`, combined using the Chicago Manual of Style, the pluralization function, and a [serial comma](https://www.behance.net/gallery/19417363/The-Oxford-Comma).
 ### Variable Syntax
 The syntax for a variable changes when using an R Markdown file (denoted by the `.Rmd` filename extension), as opposed to a regular Markdown file (`.md`). Return to the example file and type the following:
     `r# v$date$anchor`
 The preview pane shows the date.
 ### Autocomplete
 Automatically insert a variable reference into the text as follows:
 . Type: `Jos`
     * Note the capital letter, matches are case sensitive.
 . Hold down the `Control` key.
 . Tap the `Spacebar`
 The editor shows:
     `r#x( v$editor$examples$name$given )`
 The preview pane shows:
     Josephine
 Here, the `x` function evaluates its parameter as an expression. This allows variables to include expressions in their definition.
 ### Variable Definition Expressions
 Definition file variables are have the ability to reference other definitions. Try the following:
     x = `r#x( v$editor$examples$math$x )`;
     y = `r#x( v$editor$examples$math$y )`;
     z = `r#x( v$editor$examples$math$z )`
 The preview pane shows:
     x = 1.0; y = 2.0; z = 3.0
 ### Case
 Ensure words begin with a lowercase letter as follows:
     `r#lc( v$editor$examples$name$given )`
 The preview pane shows:
     josephine
 Similarly, ensure an uppercase letter as follows:
     `r#uc( 'hello, world!' )`
 The preview pane shows:
     Hello, world!
 ### Month
 Display the month name given a month number as follows:
     `r# month( 1 )`
 The preview pane shows:
     January
 ## Summary
 Authors can inline R statements into documents, directly, so long as those statements generate text. Plots, graphs, and images must be referenced as external image files or URLs.

A docs/r/images/bootstrap.png

Binary file

A docs/r.md

 # Introduction
 This document describes how to use the [R](https://www.r-project.org/)
 programming language from within the application. The application uses an
 interpreter known as [Renjin](https://www.renjin.org/) to integrate with R.
 # Hello world
 Complete the following steps to see R in action:
 . Start the application.
 . Click **File → New** to create a new file.
 . Click **File → Save As**.
 . Set **Name** to: `addition.Rmd`
 . Click **Save**.
 Setting the file name extension tells the application what processor to
 use when transforming the contents for display in the preview pane. Continue
 by typing in the following text, including the backticks:
 ```r
 `r#1 + 1`
 ```
 The preview pane shows the result of `1` plus `1`:
 ```
 .0
 ```
 # Bootstrap script
 Being able to run R code while editing an R Markdown document is convenient.
 Having the ability to call functions is where the power of R can be
 leveraged.
 Complete the following steps to call an R function from your own library:
 . Click **File → New** to create a new file.
 . Click **File → Save As**.
 . Browse to your home directory.
 . Set **Name** to: `library.R`.
 . Click **Save**.
 . Set the contents to:
     ``` r
     sum <- function( a, b ) {
       a + b
+    }
     ```
 . Click the **Save** icon.
 . Click **R → Script**.
 . Set the **R Startup Script** contents to:
     ``` r
     source( 'library.R' );
     ```
 . Click **OK**.
 . Create a new file.
 . Set the contents to:
     ``` r
     `r#sum( 5, 5 )`
     ```
 . Save the file as `sum.R`.
 The preview panel shows the result of calling the `sum` function:
 ```
 .0
 ```
 This shows how the bootstrap script can load `library.R`, which defines
 a `sum` function that is called by name in the Markdown document.
 # Working directory
 R files may be sourced from any directory, not just the user's home
 directory. Accomplish this as follows:
 . Click **R → Directory**.
 . Set **Directory** to a different directory.
 . Click **OK**.
 . Create the directory if it does not exist.
 . Move `library.R` into the directory.
 . Append a new function to `library.R` as follows:
     ``` r
     mul <- function( a, b ) {
       a * b
+    }
     ```
 . Click **R → Script**.
 . Set the **R Startup Script** contents to:
     ``` r
     setwd( v$application$r$working$directory );
     source( "library.R" );
     ```
 . Change `sum.Rmd` to:
     ``` r
     `r#mul( 5, 5 )`
     ```
 . Close the file `sum.Rmd`.
 . Confirm saving the file when prompted.
 . Re-open `sum.Rmd`.
 The preview panel shows:
 ```
 .0
 ```
 Calling `setwd` using `v$application$r$working$directory` changes the
 working directory where the R engine searches for source files.
 # YAML variable definitions
 To see how variable definitions work in R, try the following:
 . Create a new file.
 . Change the contents to (use spaces not tabs):
     ``` yaml
     project:
       title: Project Title
       author: Author Name
     ```
 . Save the file as `definitions.yaml`.
 . Click **File → Open**.
 . Set **Source Files** to **Variable Files**.
 . Select `definitions.yaml`.
 . Click **Open**.
 . Open `sum.Rmd` if it is not already open.
 . Type: `je`
 . Press `Ctrl+Space`
 The editor inserts the following text (matches `je` against Pro**je**ct):
 ``` r
 `r#x( v$project$title )`
 ```
 The preview panel shows:
 ```
 r#x( 'Project Title' )
 ```
 This is because the application inserts variable reference names based
 on the type of file being edited. By default, the R engine does not have
 a function named `x` defined.
 Continue as follows:
 . Click **R → Script**.
 . Append the following:
     ``` r
     x <- function( s ) {
       tryCatch( {
         r = eval( parse( text = s ) )
         ifelse( is.atomic( r ), r, s );
       },
       warning = function( w ) { s },
       error = function( e ) { s } )
+    }
     ```
 . Click **OK**.
 . Close and re-open `sum.Rmd`.
 The preview panel shows:
 ```
 .0
 Project Title
 ```
 The `x` function attempts to evaluate the expression defined by the YAML
 variable. This means that the YAML variables can also include expressions
 that R is capable of evaluating.
 While the `x` function can be defined within the R Startup Script, it is
 better practice to put it into its own library so that it can be reused
 outside of the application.

A docs/samples/korean.md

 *Song of the Yellow Bird*:
 	翩翩黃鳥，
 	雌雄相依。
 	念我之獨，
 	誰其與歸?
 English translation:
 	Orioles fly smoothly
 	Female and male cuddle close together
 	Thinking of my loneliness
 	Whom shall I go with?
 Fonts:
 * Regular: 활판 인쇄술
 * Bold: **활판 인쇄술**
 * Monospace: `활판 인쇄술`
 * Monospace bold: **`활판 인쇄술`**
 * Math: $E=mc^2$

A docs/samples/math.yaml

 ---
 formula:
   sqrt:
     value: "420"
   quadratic:
     a: "25"
     b: "84.906"
     c: "20"

A docs/samples/quadratic.Rmd

 ![Logo](../images/app-title)
 Given the quadratic formula:
 $x = \frac{-b \pm \sqrt{b^2 -4ac}}{2a}$
 Formatted in an R Markdown document as follows:
     $x = \frac{-b \pm \sqrt{b^2 -4ac}}{2a}$
 We can substitute the following values:
 $a = `r# x(v$formula$quadratic$a)`, b = `r# x(v$formula$quadratic$b)`, c = `r# x(v$formula$quadratic$c)`$
 `r# -x(v$formula$quadratic$b) + sqrt( v$formula$quadratic$b^2  - 4 * v$formula$quadratic$a * v$formula$quadratic$c )`
 To arrive at two solutions:
 $x = \frac{-b + \sqrt{b^2 -4ac}}{2a} = `r# (-x(v$formula$quadratic$b) + sqrt( x(v$formula$quadratic$b)^2  - 4 * x(v$formula$quadratic$a) * x(v$formula$quadratic$c) )) / (2 * x(v$formula$quadratic$a))`$
 $x = \frac{-b - \sqrt{b^2 -4ac}}{2a} = `r# (-x(v$formula$quadratic$b) - sqrt( x(v$formula$quadratic$b)^2  - 4 * x(v$formula$quadratic$a) * x(v$formula$quadratic$c) )) / (2 * x(v$formula$quadratic$a))`$
 Changing the variable values is reflected in the output immediately.

A docs/samples/tex.Rmd

 # ![Logo](../images/app-title.png)
 # Real-time equation rendering
 Interpolated variables within R calculations, formatted as an equation:
 $\sqrt{`r#x( v$formula$sqrt$value)`} = \pm `r# round(sqrt(x( v$formula$sqrt$value )),5)`$
 # Maxwell's equations
 $rot \vec{E} = \frac{1}{c} \frac{\partial{\vec{B}}}{\partial t}, div \vec{B} = 0$
 $rot \vec{B} = \frac{1}{c} \frac{\partial{\vec{E}}}{\partial t} + \frac{4\pi}{c} \vec{j}, div \vec{E} = 4 \pi \rho_{\varepsilon}$
 # Time-dependent Schrödinger equation
 $- \frac{{\hbar ^2 }}{{2m}}\frac{{\partial ^2 \psi (x,t)}}{{\partial x^2 }} + U(x)\psi (x,t) = i\hbar \frac{{\partial \psi (x,t)}}{{\partial t}}$
 # Discrete-time Fourier transforms
 Unit step function: $u(n) \Leftrightarrow \frac{1}{1-e^{-jw}} + \sum_{k=-\infty}^{\infty} \pi \delta (\omega + 2\pi k)$
 Shifted delta: $\delta (n - n_o ) \Leftrightarrow e^{ - j\omega n_o }$
 # Faraday's Law
 $\oint_C {E \cdot d\ell  =  - \frac{d}{{dt}}} \int_S {B_n dA}$
 # Infinite series
 $sin(x) = \sum_{n = 1}^{\infty}  {\frac{{( { - 1})^{n - 1} x^{2n - 1} }}{{( {2n - 1})!}}}$
 # Magnetic flux
 $\phi _m  = \int_S {N{{B}} \cdot {{\hat n}}dA = } \int_S {NB_n dA}$
 # Driven oscillation amplitude
 $A = \frac{{F_0 }}{{\sqrt {m^2 ( {\omega _0^2  - \omega ^2 } )^2  + b^2 \omega ^2 } }}$
 # Optics
 $\phi  = \frac{{2\pi }}{\lambda }a sin(\theta)$

A docs/screenshots.md

 # Variables
 Diagrams that include variables:
 ![GraphViz diagram screenshot](images/screenshots/01.png)
 ![Family tree diagram screenshot](images/screenshots/05.png)
 # PDF themes
 In the background of the following screenshot, the editor shows a novel
 being edited:
 ![PDF themes](images/screenshots/08.png)
 Highlighted items of note:
 * PDF icon in the upper-left
 * Novel metadata as integrated variables towards the top-left
 * Theme selection dialog in the upper-middle
 * Three different styles, including:
     * Boschet, based on Baskerville font, nicely styled
     * Handrit, based on Courier font, double-spaced, manuscript format
     * Tarmes, based on Times Roman font, minimal styling
 * Variations in page numbers
 * Manuscript includes word count, automatically
 * Preferences dialog in the middle
 # Internationalization
 Poem with locale settings:
 ![Korean poem screenshot](images/screenshots/02.png)
 # Equations
 TeX equations with detached preview:
 ![TeX equations screenshot](images/screenshots/03.png)
 # Dockable tabs
 Document outline opened and docked in bottom-left corner:
 ![Document outline](images/screenshots/04.png)

A docs/skins.md

 # Skins
 The application provides bundled skins and the ability to add custom
 skins. This document describes the interplay between bundled skins
 and building your own look and feel.
 A skin is a set of styles, similar to cascading style sheet classes,
 that configures the user interface colours, fonts, spacing, highlights,
 drop-shadows, gradients, and more.
 For more information on CSS, see the [W3C CSS tutorial](https://www.w3.org/Style/Examples/011/firstcss).
 # Order
 The order that stylesheets are applied matters so that stylesheets can
 override styles defined previously. The application's user interface
 is made up of the following stylesheets, applied in the order listed:
 * **scene.css** --- Defines toolbar styling.
 * **markdown.css** --- Defines text editor styling.
 * **skins/skin_name.css** --- Bundled skin selected in preferences.
 * **custom.css** --- User-defined file set in preferences.
 # Customization
 Create a custom skin as follows:
 . Start the application.
 . Click **File → New** to create a new file.
 . Click **File → Save As** to rename the file.
 . Save the file as `custom.css`.
 . Change the content to the following:
 ``` css
 .root {
   -fx-base: rgb( 30, 30, 30 );
   -fx-background: -fx-base;
+}
 ```
 Next, apply the skin as follows:
 . Click **Edit → Preferences** to open the preferences dialog.
 . Click **Skins** to view the available options.
 . Click **Browse** to select a custom file.
 . Browse to and select `custom.css`, created previously.
 . Click **Open**.
 . Click **Apply**.
 The user interface immediately changes to a dark mode. Continue:
 . Click **OK** to close the dialog.
 . Change the **rgb** numbers in **custom.css** from `30` to `60`.
 . Click **File → Save** to save the CSS file.
 The user interface immediately changes colour.
 # Classes
 When creating your own skin, there many classes that can be styled. The
 previous section showed how to set up a rudimentary skin. Instead, start
 with a template that already has a number of classes defined so that you
 can tweak them to your taste. Accomplish this as follows:
 . Visit the [skin](https://github.com/DaveJarvis/keenwrite/tree/master/src/main/resources/com/keenwrite/skins) repository directory
 . Click one of the files (e.g., `haunted_grey.css`).
 . Click **Raw**.
 . Copy the entire text.
 . Return to `custom.css`.
 . Delete the contents.
 . Paste the copied text.
 . Save the file.
 To see how the CSS styles are applied to the text editor, open
 [markdown.css](https://github.com/DaveJarvis/keenwrite/blob/master/src/main/resources/com/keenwrite/editor/markdown.css), which is also in the repository.
 # Modena
 The basic look used by the application is _Modena Light_. Typically we
 only need to override a few classes to completely change the application's
 look and feel. For a full listing of available styles see the OpenJDK's
 [Modena CSS file](https://github.com/openjdk/jfx/blob/master/modules/javafx.controls/src/main/resources/com/sun/javafx/scene/control/skin/modena/modena.css).
 # JavaFX CSS
 The [Java CSS Reference Guide](https://openjfx.io/javadoc/11/javafx.graphics/javafx/scene/doc-files/cssref.html) is exhaustive. In addition to showing many
 differences between JavaFX CSS and W3C CSS, the guide introduces numerous
 helpful functions for manipulating colours and gradients using existing
 colour definitions.
 # RichTextFX
 The application uses RichTextFX to render the text editor. Styling various
 text editor classes can require using the prefix `-rtfx` instead of the
 regular JavaFX `-fx`.
 # Submit
 If you have a look that you'd like to contribute to the project, do pass
 it along. Either open a new issue in the [issue tracker](https://github.com/DaveJarvis/keenwrite/issues) that contains the CSS file or submit a pull request.

A docs/svg.md

 # Introduction
 The Scalable Vector Graphics (SVG) drawing software---[Batik](https://xmlgraphics.apache.org/batik/)---that's used by the application may be unable to read certain SVG files produced by [Inkscape](https://inkscape.org/). The result is that embedding the vector graphics files may trigger the following issues:
 * Unable to create nested element
 * Black blocks, no text displayed
 * Black text instead of coloured
 The remainder of this document explains these problems and how to fix them.
 # Nested element
 When referencing a vector graphic using Markdown, the status bar may show the following error:
 > The current document is unable to create an element of the requested type (namespace: http://www.w3.org/2000/svg, name: flowRoot).
 This error is due to a version mismatch of the `flowRoot` element that Inkscape creates.
 ## Fix
 Resolve the issue by changing the SVG version number as follows:
 . Edit the vector graphics file using any text editor.
 . Find `version="1.1"` and change it to `version="1.2"`.
 . Save the file.
 The SVG will now appear inside the application; however, the text may appear as black blocks.
 # Black blocks
 Depending on how text is added to a vector graphic in Inkscape, the text may be inserted within an element called a `flowRoot`. Although Batik recognizes `flowRoot` for SVG version 1.2, it cannot fully interpret the contents. Black blocks are drawn instead of the text, such as those depicted in the following figure:
 ![Missing text](images/blocked-text.png)
 ## Fix
 Resolve the issue by "unflowing" all text elements as follows:
 . Start Inkscape.
 . Load the SVG file.
 . Select all the text elements.
 . Click **Text → Unflow**.
 The text may change size and position; recreate the text without dragging using the text tool. After all the text areas have been recreated, continue as follows:
 . Click **Edit → XML Editor**.
 . Expand the **XML Editor** to see more elements.
 . Delete all elements named `svg:flowRoot`.
 . Save the file.
 When the illustration is reloaded, the black blocks will have disappeared, but the text elements ignore any assigned colour.
 # Black text
 When an SVG `style` attribute contains a reference to `-inkscape-font-specification`, Batik ignores all values that follow said reference. This results in black text, such as:
 ![Black text](images/black-text.png)
 ## Fix
 Resolve the issue of colourless text as follows:
 . Open the SVG file in a plain text editor.
 . Remove all references `-inkscape-font-specification:'<FONT>';`, including the trailing (or leading) semicolon.
 . Save the file.
 When the illustration is reloaded, the colours will have reappeared, such as:
 ![Resolved text](images/resolved-text.png)

A docs/typesetting-custom.md

 # Overview
 Typesetting PDF files entails the following:
 * Download and install typesetting software
 * Download a theme pack
 These are described in the subsequent sections. Once the requirements have been met, continue reading to learn how to typeset a document.
 # Download typesetter
 Download the typesetting software as follows:
 . Start the text editor.
 . Click **File → Export As → PDF**.
     * Note the following details (e.g., Windows X86 64-bit):
         * operating system name;
         * instruction set; and
         * architecture.
 . Click the [link](https://wiki.contextgarden.net/Installation) in the dialog.
 . Download the appropriate archive file.
 # Install typesetter
 This section describes the installation steps for various platforms. Follow the steps that apply to the computer's operating system:
 * [Windows](#windows) (includes Windows 7, Windows 10, and similar)
 * [Unix](#unix) (includes MacOS, FreeBSD, Linux, and similar)
 ## Windows
 Proceed with a Windows installation of the typesetting software as follows:
 . Extract the `.zip` file into `C:\Users\%USERNAME%\AppData\Local\context` (the "root" directory)
 . Run **install.bat** to download and install the software.
     * If prompted, click **Run anyway** (or click **More info** first).
 . Right-click <a href="https://github.com/DaveJarvis/keenwrite/raw/master/scripts/localpath.bat">localpath.bat</a>.
 . Select **Save Link As** (or similar).
 . Save the file to the typesetting software's "root" directory.
 . Rename `localpath.bat.txt` to `localpath.bat`, if necessary.
 . Run `localpath.bat` (to set and save the `PATH` environment variable).
 Installation is complete. Verify the installation as follows:
 . Type: `context --version`
 . Press `Enter`.
 If version information is displayed then the software is installed correctly.
 Continue by installing a [theme pack](#theme-pack).
 ## Unix
 For Linux, MacOS, FreeBSD, and similar operating systems, proceed as follows:
 . Create `$HOME/.local/bin/context`
 . Extract the `.zip` file within `$HOME/.local/bin/context`
 . Run `sh install.sh`
 . Add `export PATH=$PATH:$HOME/.local/bin/context/tex/texmf-linux-64/bin` to the login script.
 Installation is complete. Verify the installation as follows:
 . Open a new terminal (to export the new PATH setting).
 . Type: `context --version`
 . Press `Enter`.
 If version information is displayed then the software is installed correctly.
 Continue by installing a [theme pack](#theme-pack).
 # Theme pack
 A theme pack is a set of themes that define how documents appear when typeset. Broadly, themes are applied as follows:
 * Install a theme pack
 * Configure individual themes
 ## Install theme pack
 Install and configure the default theme pack as follows:
 . Download the <a href="https://gitreleases.dev/gh/DaveJarvis/keenwrite-themes/latest/theme-pack.zip">theme-pack.zip</a> archive.
 . Extract archive into a known location.
 . Start the text editor, if not already running.
 . Click **Edit → Preferences**.
 . Click **Typesetting**.
 . Click **Browse** beside **Themes**.
 . Navigate to the `themes` directory.
 . Click **Open**.
 . Click **OK**.
 The theme pack is installed.
 Each theme has its own requirements, described below.
 ## Configure Boschet theme
 Download and install the following font families:
 * [Libre Baskerville](https://fonts.google.com/specimen/Libre+Baskerville)
 * [Archivo Narrow](https://fonts.google.com/specimen/Archivo+Narrow)
 * [Inconsolata](https://fonts.google.com/specimen/Inconsolata)
 The theme is configured.
 # Typeset single document
 Typeset a document as follows:
 . Start the text editor, if not already running.
 . Click **File → New** (or type `Ctrl+n`).
 . Type in some text.
 . Click **File → Export As → PDF** (or type `Ctrl+p`).
 . Select a theme from the drop-down list.
 . Click **OK** (or press `Enter`).
 . Set the **File name** to the PDF file name.
 . Click **Save**.
 The document is typeset; open the PDF file in a PDF reader to view the result.
 # Typeset multiple documents
 Typeset multiple documents similar to single documents, with one difference:
 * Click **File → Export As → Joined PDF** (or type `Ctrl+Shift+p`).
 All documents having the same file name extension in the same directory
 (or sub-directories) as the actively edited file are first concatenated then
 typeset into a single PDF document. The order that files are concatenated
 is numeric and alphabetic.
 For example, if `1.Rmd` is a sibling of the following files in the same
 directory, then all the files will be included in the PDF, as expected:
     chapter_1.Rmd
     chapter_2.Rmd
     chapter_2a.Rmd
     chapter_2b.Rmd
     chapter_3.Rmd
     chapter_10.Rmd
 Basically, sorting honours numbers and letters in file names.
 # Background
 This text editor helps keep content separated from presentation. Plain text documents will remain readable long after proprietary formats have become obsolete. However, we've come to expect much more in what we read than mere text: from hyperlinked tables of contents to indexes, from footers to footnotes, from mathematical expressions to complex graphics, modern documents are nuanced and multifaceted.
 ## History
 Before computer-based typesetting, much of mathematics was put to page by hand. Professional typesetters, who were often expensive and usually not mathematicians, would inadvertently introduce typographic errors into equations. Phototypesetting technology improved upon hand-typesetting, but well-known computer scientist Donald Knuth---whose third volume of *The Art of Computer Programming* was phototypeset in 1976---expressed dissatisfaction with its typographic quality. He set himself two goals: let anyone create high-quality books without much effort and provide software that typesets consistently on all capable computers. Two years later, he released a typesetting system and a font description language: TeX and METAFONT, respectively.
 In short, TeX is software that helps typeset plain text documents.
 ## ConTeXt
 Programming computers to typeset internationalized text automatically at the level we've become accustomed takes decades of development effort. Many free and open source software solutions can typeset text, including: ConTeXt, LaTeX, Sile, and others. ConTeXt, which builds upon TeX, is ideal for typesetting plain text into beautiful documents because it is developed with a notion of *setups*. These setups can wholly describe how text is to be typeset and---by being external to the text itself---configuring setups provides ample control over the document's final appearance without changing the prose.
 # Further reading
 Here are a few documents that introduce the typesetting system:
 * *What is ConTeXt?* ([English](https://www.pragma-ade.com/general/manuals/what-is-context.pdf))
 * *A not so short introduction to ConTeXt* ([English](https://github.com/contextgarden/not-so-short-introduction-to-context/raw/main/en/introCTX_eng.pdf) or [Spanish](https://raw.githubusercontent.com/contextgarden/not-so-short-introduction-to-context/main/es/introCTX_esp.pdf))
 * *Dealing with XML in ConTeXt MKIV* ([English](https://pragma-ade.com/general/manuals/xml-mkiv.pdf))
 * *Typographic Programming* ([English](https://www.pragma-ade.com/general/manuals/style.pdf))
 The [documentation library](https://wiki.contextgarden.net/Documentation) includes the following gems:
 * [ConTeXt Manual](https://www.pragma-ade.nl/general/manuals/ma-cb-en.pdf)
 * [ConTeXt command reference](https://www.pragma-ade.nl/general/qrcs/setup-en.pdf)
 * [METAFUN Manual](https://www.pragma-ade.nl/general/manuals/metafun-p.pdf)
 * [It's in the Details](https://www.pragma-ade.nl/general/manuals/details.pdf)
 * [Fonts out of ConTeXt](https://www.pragma-ade.com/general/manuals/fonts-mkiv.pdf)
 Expert-level documentation includes the [LuaTeX Reference Manual](https://www.pragma-ade.nl/general/manuals/luatex.pdf).

A docs/typesetting.md

 # Typesetting
 The application uses the [ConTeXt](https://contextgarden.net) typesetting
 system, the [podman](https://podman.io/) container manager, various
 [themes](https://github.com/DaveJarvis/keenwrite-themes/), and numerous
 fonts to produce high-quality PDF files. The container manager significantly
 reduces the number of manual steps in the installation process.
 When exporting a document to a PDF file for the first time, a series of
 semi-automated steps guides users through the installation process. These
 steps differ depending on the operating system.
 Run the installation wizard as follows:
 . Start the application.
 . Click **File → Export As → PDF**.
 A wizard appears.
 ## Windows
 ## Linux
 ## macOS

A docs/variables.md

 # Introduction
 This document describes how to use the application.
 # Variable definitions
 Variable definitions provide a way to insert key names having associated values into a document. The variable names and values are declared inside an external file using the [YAML](http://www.yaml.org/) file format. Simply put, variables are written in the file as follows:
 ```
 key: value
 ```
 Any number of variables can be defined, in any order:
 ```
 key_1: Value 1
 key_2: Value 2
 ```
 Variables can reference other variables by bookending the key name within symbols:
 ```
 key: Value
 key_1: {{key}} 1
 key_2: {{key}} 2
 ```
 Variables can use a nested structure to help group related information:
 ```
 novel:
   title: Book Title
   author: Author Name
   isbn: 978-3-16-148410-0
 ```
 Use a period to reference nested keys, such as:
 ```
 novel:
   author: Author Name
 copyright:
   owner: {{novel.author}}
 ```
 Save the variable definitions in a file having an extension of `.yaml` or `.yml`.
 # Document editing
 The application's purpose is to completely separate the document's content from its presentation. To achieve this, documents are composed using a [plain text](http://spec.commonmark.org/0.28/) format.
 ## Create document
 Start a new document as follows:
 . Start the application.
 . Click **File → New** to create an empty document to edit.
 . Click **File → Open** to open a variable definition file.
 . Change **Source Files** to **Variable Files** to list variable definition files.
 . Browse to and select a file saved with a `.yaml` or `.yml` extension.
 . Click **Open**.
 The variable definitions appear in the variable definition pane under the heading of **Variables**.
 ## Edit document
 Edit the document as normal. Notice how the preview pane updates as new content is added. The toolbar shows various icons that perform different formatting operations. Try them to see how they appear in the preview pane. Other operations not shown on the toolbar include:
 * Struck text (enclose the words within `~~` and `~~`)
 * Horizontal rule (use `---` on an otherwise empty line).
 The preview pane shows one way to interpret and format the document, but many other presentations are possible.
 ## Insert variable
 Let's assume that the variable definitions loaded into the application include:
 ```
 novel:
   title: Diary of {{novel.author}}
   author: Anne Frank
 ```
 To reference a variable, type in the key name enclosed within double braces, such as:
 ```
 The novel "{{novel.title}}" is one of the most widely read books in the world.
 ```
 The preview pane shows:
 > The novel "Diary of Anne Frank" is one of the most widely read books in the world.
 As it is laborious to type in variable names, it is possible to inject the variable name using autocomplete. Accomplish this as follows:
 . Create a new file.
 . Type in a partial variable value, such as **Dia**.
 . Press `Ctrl+Space` (hold down the `Control` key and tap the spacebar).
 The editor shows:
 ```
 {{novel.title}}
 ```
 The preview pane shows:
 ```
 Diary of Anne Frank
 ```
 The variable name is inserted into the document and the preview pane shows the variable's value.

A fonts/README.md

 # Fonts
 For best results, it is recommended that the Noto Font family is installed
 on the system. The required font families include:
 * Sans-serif --- editor pane
 * Serif --- preview pane
 * Serif monospace --- preview pane
 # Chinese, Japanese, and Korean (CJK)
 Download and install from the following font bundles:
 * [Hong Kong](noto-hk.zip)
 * [Japanese](noto-jp.zip)
 * [Korean](noto-kr.zip)
 * [Simplified Chinese](noto-sc.zip)
 * [Traditional Chinese](noto-tc.zip)
 Except for Hong Kong, each bundle contains all the required font families;
 Hong Kong must be paired with the Simplified Chinese.
 The [official versions](https://www.google.com/get/noto/) of these fonts
 are updated regularly at the Noto Fonts
 [repository](https://github.com/googlefonts/noto-fonts/). If downloading
 from the original location, be sure to retrieve all font families needed
 for the application to render text correctly.
 # Internationalization
 Fonts for other languages may work but have not been tested.

A fonts/noto-hk.zip

Binary file

A fonts/noto-jp.zip

Binary file

A fonts/noto-kr.zip

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A fonts/noto-sc.zip

Binary file

A fonts/noto-tc.zip

Binary file

A gradle.properties

 org.gradle.jvmargs=-Xmx1G
 org.gradle.daemon=true
 org.gradle.parallel=true

A images/broken-camera.svg

<svg height='19pt' viewBox='0 0 25 19' width='25pt' xmlns='http://www.w3.org/2000/svg'><g fill='#454545'><path d='m8.042969 11.085938c.332031 1.445312 1.660156 2.503906 3.214843 2.558593zm0 0'/><path d='m6.792969 9.621094-.300781.226562.242187.195313c.015625-.144531.03125-.28125.058594-.421875zm0 0'/><path d='m10.597656.949219-2.511718.207031c-.777344.066406-1.429688.582031-1.636719 1.292969l-.367188 1.253906-3.414062.28125c-1.027344.085937-1.792969.949219-1.699219 1.925781l.976562 10.621094c.089844.976562.996094 1.699219 2.023438 1.613281l11.710938-.972656-3.117188-2.484375c-.246094.0625-.5.109375-.765625.132812-2.566406.210938-4.835937-1.597656-5.0625-4.039062-.023437-.25-.019531-.496094 0-.738281l-.242187-.195313.300781-.226562c.359375-1.929688 2.039062-3.472656 4.191406-3.652344.207031-.015625.414063-.015625.617187-.007812l.933594-.707032zm0 0'/><path d='m10.234375 11.070312 2.964844 2.820313c.144531.015625.285156.027344.433593.027344 1.890626 0 3.429688-1.460938 3.429688-3.257813 0-1.792968-1.539062-3.257812-3.429688-3.257812-1.890624 0-3.429687 1.464844-3.429687 3.257812 0 .140625.011719.277344.03125.410156zm0 0'/><path d='m14.488281.808594 1.117188 4.554687-1.042969.546875c2.25.476563 3.84375 2.472656 3.636719 4.714844-.199219 2.191406-2.050781 3.871094-4.285157 4.039062l2.609376 2.957032 4.4375.371094c1.03125.085937 1.9375-.640626 2.027343-1.617188l.976563-10.617188c.089844-.980468-.667969-1.839843-1.699219-1.925781l-3.414063-.285156-.371093-1.253906c-.207031-.710938-.859375-1.226563-1.636719-1.289063zm0 0'/></g></svg>

A installer.sh

 #!/usr/bin/env bash
 # ---------------------------------------------------------------------------
 # This script cross-compiles application launchers for different platforms.
+#
 # The application binaries are self-contained launchers that do not need
 # to be installed.
 # ---------------------------------------------------------------------------
 source $HOME/bin/build-template
 readonly APP_NAME=$(find "${SCRIPT_DIR}/src" -type f -name "settings.properties" -exec cat {} \; | grep "application.title=" | cut -d'=' -f2)
 readonly FILE_APP_JAR="${APP_NAME}.jar"
 readonly OPT_JAVA=$(cat << END_OF_ARGS
 --add-opens=javafx.controls/javafx.scene.control=ALL-UNNAMED \
 --add-opens=javafx.controls/javafx.scene.control.skin=ALL-UNNAMED \
 --add-opens=javafx.graphics/javafx.scene.text=ALL-UNNAMED \
 --add-opens=javafx.graphics/com.sun.javafx.css=ALL-UNNAMED \
 --add-opens=javafx.graphics/com.sun.javafx.text=ALL-UNNAMED \
 --add-exports=javafx.base/com.sun.javafx.event=ALL-UNNAMED \
 --add-exports=javafx.graphics/com.sun.javafx.application=ALL-UNNAMED \
 --add-exports=javafx.graphics/com.sun.javafx.geom=ALL-UNNAMED \
 --add-exports=javafx.graphics/com.sun.javafx.text=ALL-UNNAMED \
 --add-exports=javafx.graphics/com.sun.javafx.scene=ALL-UNNAMED \
 --add-exports=javafx.graphics/com.sun.javafx.scene.text=ALL-UNNAMED \
 --add-exports=javafx.graphics/com.sun.javafx.scene.traversal=ALL-UNNAMED
 END_OF_ARGS
+)
 ARG_JAVA_OS="linux"
 ARG_JAVA_ARCH="amd64"
 ARG_JAVA_VERSION="19.0.1"
 ARG_JAVA_UPDATE="11"
 ARG_JAVA_DIR="java"
 ARG_DIR_DIST="dist"
 FILE_DIST_EXEC="run.sh"
 ARG_PATH_DIST_JAR="${SCRIPT_DIR}/build/libs/${FILE_APP_JAR}"
 DEPENDENCIES=(
   "gradle,https://gradle.org"
   "warp-packer,https://github.com/Reisz/warp/releases"
   "tar,https://www.gnu.org/software/tar"
   "wine,https://www.winehq.org"
   "unzip,http://infozip.sourceforge.net"
+)
 ARGUMENTS+=(
   "a,arch,Target operating system architecture (amd64)"
   "o,os,Target operating system (linux, windows, mac)"
   "u,update,Java update version number (${ARG_JAVA_UPDATE})"
   "v,version,Full Java version (${ARG_JAVA_VERSION})"
+)
 ARCHIVE_EXT="tar.gz"
 ARCHIVE_APP="tar xf"
 APP_EXTENSION="bin"
 # ---------------------------------------------------------------------------
 # Generates
 # ---------------------------------------------------------------------------
 execute() {
   $do_configure_target
   $do_build
   $do_clean
   pushd "${ARG_DIR_DIST}" > /dev/null 2>&1
   $do_extract_java
   $do_create_launch_script
   $do_copy_archive
   popd > /dev/null 2>&1
   $do_create_launcher
   $do_brand_windows
   return 1
+}
 # ---------------------------------------------------------------------------
 # Configure platform-specific commands and file names.
 # ---------------------------------------------------------------------------
 utile_configure_target() {
   if [ "${ARG_JAVA_OS}" = "windows" ]; then
     ARCHIVE_EXT="zip"
     ARCHIVE_APP="unzip -qq"
     FILE_DIST_EXEC="run.bat"
     APP_EXTENSION="exe"
     do_create_launch_script=utile_create_launch_script_windows
     do_brand_windows=utile_brand_windows
   fi
+}
 # ---------------------------------------------------------------------------
 # Build platform-specific überjar.
 # ---------------------------------------------------------------------------
 utile_build() {
   $log "Delete ${ARG_PATH_DIST_JAR}"
   rm -f "${ARG_PATH_DIST_JAR}"
   $log "Build application for ${ARG_JAVA_OS}"
   gradle clean jar -PtargetOs="${ARG_JAVA_OS}"
+}
 # ---------------------------------------------------------------------------
 # Purges the existing distribution directory to recreate the launcher.
 # This refreshes the JRE from the downloaded archive.
 # ---------------------------------------------------------------------------
 utile_clean() {
   $log "Recreate ${ARG_DIR_DIST}"
   rm -rf "${ARG_DIR_DIST}"
   mkdir -p "${ARG_DIR_DIST}"
+}
 # ---------------------------------------------------------------------------
 # Extract platform-specific Java Runtime Environment. This will download
 # and cache the required Java Runtime Environment for the target platform.
 # On subsequent runs, the cached version is used, instead of issuing another
 # download.
 # ---------------------------------------------------------------------------
 utile_extract_java() {
   $log "Extract Java"
   local -r java_vm="jre"
   local -r java_version="${ARG_JAVA_VERSION}+${ARG_JAVA_UPDATE}"
   local -r url_java="https://download.bell-sw.com/java/${java_version}/bellsoft-${java_vm}${java_version}-${ARG_JAVA_OS}-${ARG_JAVA_ARCH}-full.${ARCHIVE_EXT}"
   local -r file_java="${java_vm}-${java_version}-${ARG_JAVA_OS}-${ARG_JAVA_ARCH}.${ARCHIVE_EXT}"
   local -r path_java="/tmp/${file_java}"
   # File must have contents.
   if [ ! -s ${path_java} ]; then
     $log "Download ${url_java} to ${path_java}"
     wget -q "${url_java}" -O "${path_java}"
   fi
   $log "Unpack ${path_java}"
   $ARCHIVE_APP "${path_java}"
   local -r dir_java="${java_vm}-${ARG_JAVA_VERSION}-full"
   $log "Rename ${dir_java} to ${ARG_JAVA_DIR}"
   mv "${dir_java}" "${ARG_JAVA_DIR}"
+}
 # ---------------------------------------------------------------------------
 # Create Linux-specific launch script.
 # ---------------------------------------------------------------------------
 utile_create_launch_script_linux() {
   $log "Create Linux launch script"
   cat > "${FILE_DIST_EXEC}" << __EOT
 #!/usr/bin/env bash
 readonly SCRIPT_SRC="\$(dirname "\${BASH_SOURCE[\${#BASH_SOURCE[@]} - 1]}")"
 "\${SCRIPT_SRC}/${ARG_JAVA_DIR}/bin/java" ${OPT_JAVA} -jar "\${SCRIPT_SRC}/${FILE_APP_JAR}" "\$@" 2>/dev/null
 __EOT
   chmod +x "${FILE_DIST_EXEC}"
+}
 # ---------------------------------------------------------------------------
 # Create Windows-specific launch script.
 # ---------------------------------------------------------------------------
 utile_create_launch_script_windows() {
   $log "Create Windows launch script"
   cat > "${FILE_DIST_EXEC}" << __EOT
 @echo off
 set SCRIPT_DIR=%~dp0
 "%SCRIPT_DIR%\\${ARG_JAVA_DIR}\\bin\\java" ${OPT_JAVA} -jar "%SCRIPT_DIR%\\${APP_NAME}.jar" %* 2>nul
 __EOT
   # Convert Unix end of line characters (\n) to Windows format (\r\n).
   # This avoids any potential line conversion issues with the repository.
   sed -i 's/$/\r/' "${FILE_DIST_EXEC}"
+}
 # ---------------------------------------------------------------------------
 # Modify the binary to include icon and identifying information.
 # ---------------------------------------------------------------------------
 utile_brand_windows() {
   # Read the properties file to get the application name (case sensitvely).
   while IFS='=' read -r key value
   do
     key=$(echo $key | tr '.' '_')
     eval ${key}=\${value}
   done < "src/main/resources/bootstrap.properties"
   readonly BINARY="${APP_NAME}.exe"
   readonly VERSION=$(git describe --tags)
   readonly COMPANY="White Magic Software, Ltd."
   readonly YEAR=$(date +%Y)
   readonly DESCRIPTION="Markdown editor with live preview, variables, and math."
   readonly SIZE=$(stat --format="%s" ${BINARY})
   wine ${SCRIPT_DIR}/scripts/rcedit-x64.exe "${BINARY}" \
     --set-icon "scripts/logo.ico" \
     --set-version-string "OriginalFilename" "${application_title}.exe" \
     --set-version-string "CompanyName" "${COMPANY}" \
     --set-version-string "ProductName" "${application_title}" \
     --set-version-string "LegalCopyright" "Copyright ${YEAR} ${COMPANY}" \
     --set-version-string "FileDescription" "${DESCRIPTION}" \
     --set-version-string "Size" "${DESCRIPTION}" \
     --set-product-version "${VERSION}" \
     --set-file-version "${VERSION}"
   mv -f "${BINARY}" "${application_title}.exe"
+}
 # ---------------------------------------------------------------------------
 # Copy application überjar.
 # ---------------------------------------------------------------------------
 utile_copy_archive() {
   $log "Create copy of ${FILE_APP_JAR}"
   cp "${ARG_PATH_DIST_JAR}" "${FILE_APP_JAR}"
+}
 # ---------------------------------------------------------------------------
 # Create platform-specific launcher binary.
 # ---------------------------------------------------------------------------
 utile_create_launcher() {
   local -r FILE_APP_NAME="${APP_NAME}.${APP_EXTENSION}"
   $log "Create ${FILE_APP_NAME}"
   # Warp-packer does not seem to overwrite the file.
   rm -f "${FILE_APP_NAME}"
   # Download uses amd64, but warp-packer differs.
   if [ "${ARG_JAVA_ARCH}" = "amd64" ]; then
     ARG_JAVA_ARCH="x64"
   fi
   warp-packer \
     pack \
     --arch "${ARG_JAVA_OS}-${ARG_JAVA_ARCH}" \
     --input-dir "${ARG_DIR_DIST}" \
     --exec "${FILE_DIST_EXEC}" \
     --output "${FILE_APP_NAME}" > /dev/null
   chmod +x "${FILE_APP_NAME}"
+}
 argument() {
   local consume=2
   case "$1" in
     -a|--arch)
     ARG_JAVA_ARCH="$2"
     ;;
     -o|--os)
     ARG_JAVA_OS="$2"
     ;;
     -u|--update)
     ARG_JAVA_UPDATE="$2"
     ;;
     -v|--version)
     ARG_JAVA_VERSION="$2"
     ;;
   esac
   return ${consume}
+}
 do_configure_target=utile_configure_target
 do_build=utile_build
 do_clean=utile_clean
 do_extract_java=utile_extract_java
 do_create_launch_script=utile_create_launch_script_linux
 do_copy_archive=utile_copy_archive
 do_create_launcher=utile_create_launcher
 do_brand_windows=:
 main "$@"

A keenwrite.sh

 #!/usr/bin/env bash
 java \
   --add-opens=javafx.controls/javafx.scene.control=ALL-UNNAMED \
   --add-opens=javafx.controls/javafx.scene.control.skin=ALL-UNNAMED \
   --add-opens=javafx.graphics/javafx.scene.text=ALL-UNNAMED \
   --add-opens=javafx.graphics/com.sun.javafx.css=ALL-UNNAMED \
   --add-opens=javafx.graphics/com.sun.javafx.scene=ALL-UNNAMED \
   --add-opens=javafx.graphics/com.sun.javafx.text=ALL-UNNAMED \
   --add-exports=javafx.base/com.sun.javafx.event=ALL-UNNAMED \
   --add-exports=javafx.graphics/com.sun.javafx.application=ALL-UNNAMED \
   --add-exports=javafx.graphics/com.sun.javafx.geom=ALL-UNNAMED \
   --add-exports=javafx.graphics/com.sun.javafx.text=ALL-UNNAMED \
   --add-exports=javafx.graphics/com.sun.javafx.scene=ALL-UNNAMED \
   --add-exports=javafx.graphics/com.sun.javafx.scene.text=ALL-UNNAMED \
   --add-exports=javafx.graphics/com.sun.javafx.scene.traversal=ALL-UNNAMED \
   -jar keenwrite.jar $@

A libs/flying-saucer-core-9.1.23.jar

Binary file

A libs/keenquotes.jar

Binary file

A libs/keenspell.jar

Binary file

A libs/keentype-lib.jar

Binary file

A libs/tokenize.jar

Binary file

A r.zip

Binary file

A release.sh

 #!/usr/bin/env bash
 # ---------------------------------------------------------------------------
 # This script builds Windows, Linux, and Java archive binaries for a
 # release.
 # ---------------------------------------------------------------------------
 source $HOME/bin/build-template
 readonly FILE_PROPERTIES="${SCRIPT_DIR}/src/main/resources/bootstrap.properties"
 readonly BIN_INSTALLER="${SCRIPT_DIR}/installer.sh"
 DEPENDENCIES=(
   "gradle,https://gradle.org"
   "zip,http://infozip.sourceforge.net"
   "${FILE_PROPERTIES},File containing application name"
+)
 execute() {
   $log "Remove distribution directory"
   rm -rf "${SCRIPT_DIR}/dist"
   $log "Remove stale binaries"
   rm -f "${application_title,,}.jar"
   rm -f "${application_title,,}.bin"
   rm -f "${application_title}.exe"
   $log "Build Java archive"
   gradle clean jar
   mv "build/libs/${application_title,,}.jar" .
   $log "Build Windows installer binary"
   ${BIN_INSTALLER} -o windows
   $log "Build Linux installer binary"
   ${BIN_INSTALLER} -o linux
+}
 preprocess() {
   while IFS='=' read -r key value; do
     if [[ "${key}" = "" || "${key}" = "#"* ]]; then
       continue
     fi
     key=$(echo $key | tr '.' '_')
     eval ${key}=\${value}
   done < "${FILE_PROPERTIES}"
   application_title="${application_title}"
   return 1
+}
 main "$@"

A scripts/build-template

 #!/usr/bin/env bash
 # -----------------------------------------------------------------------------
 # Copyright 2020 Dave Jarvis
+#
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be included
 # in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 set -o errexit
 set -o nounset
 readonly SCRIPT_SRC="$(dirname "${BASH_SOURCE[${#BASH_SOURCE[@]} - 1]}")"
 readonly SCRIPT_DIR="$(cd "${SCRIPT_SRC}" >/dev/null 2>&1 && pwd)"
 readonly SCRIPT_NAME=$(basename "$0")
 # -----------------------------------------------------------------------------
 # The main entry point is responsible for parsing command-line arguments,
 # changing to the appropriate directory, and running all commands requested
 # by the user.
+#
 # $@ - Command-line arguments
 # -----------------------------------------------------------------------------
 main() {
   arguments "$@"
   $usage       && terminate 3
   requirements && terminate 4
   traps        && terminate 5
   directory    && terminate 6
   preprocess   && terminate 7
   execute      && terminate 8
   postprocess  && terminate 9
   terminate 0
+}
 # -----------------------------------------------------------------------------
 # Perform all commands that the script requires.
+#
 # @return 0 - Indicate to terminate the script with non-zero exit level
 # @return 1 - All tasks completed successfully (default)
 # -----------------------------------------------------------------------------
 execute() {
   return 1
+}
 # -----------------------------------------------------------------------------
 # Changes to the script's working directory, provided it exists.
+#
 # @return 0 - Change directory failed
 # @return 1 - Change directory succeeded
 # -----------------------------------------------------------------------------
 directory() {
   $log "Change directory"
   local result=1
   # Track whether change directory failed.
   cd "${SCRIPT_DIR}" > /dev/null 2>&1 || result=0
   return "${result}"
+}
 # -----------------------------------------------------------------------------
 # Perform any initialization required prior to executing tasks.
+#
 # @return 0 - Preprocessing failed
 # @return 1 - Preprocessing succeeded
 # -----------------------------------------------------------------------------
 preprocess() {
   $log "Preprocess"
   return 1
+}
 # -----------------------------------------------------------------------------
 # Perform any clean up required prior to executing tasks.
+#
 # @return 0 - Postprocessing failed
 # @return 1 - Postprocessing succeeded
 # -----------------------------------------------------------------------------
 postprocess() {
   $log "Postprocess"
   return 1
+}
 # -----------------------------------------------------------------------------
 # Check that all required commands are available.
+#
 # @return 0 - At least one command is missing
 # @return 1 - All commands are available
 # -----------------------------------------------------------------------------
 requirements() {
   $log "Verify requirements"
   local -r expected_count=${#DEPENDENCIES[@]}
   local total_count=0
   # Verify that each command exists.
   for dependency in "${DEPENDENCIES[@]}"; do
     # Extract the command name [0] and URL [1].
     IFS=',' read -ra dependent <<< "${dependency}"
     required "${dependent[0]}" "${dependent[1]}"
     total_count=$(( total_count + $? ))
   done
   unset IFS
   # Total dependencies found must match the expected number.
   # Integer-only division rounds down.
   return $(( total_count / expected_count ))
+}
 # -----------------------------------------------------------------------------
 # Called before terminating the script.
 # -----------------------------------------------------------------------------
 cleanup() {
   $log "Cleanup"
+}
 # -----------------------------------------------------------------------------
 # Terminates the program immediately.
 # -----------------------------------------------------------------------------
 trap_control_c() {
   $log "Interrupted"
   cleanup
   error "⯃"
   terminate 1
+}
 # -----------------------------------------------------------------------------
 # Configure signal traps.
+#
 # @return 1 - Signal traps are set.
 # -----------------------------------------------------------------------------
 traps() {
   # Suppress echoing ^C if pressed.
   stty -echoctl
   trap trap_control_c INT
   return 1
+}
 # -----------------------------------------------------------------------------
 # Check for a required command.
+#
 # $1 - Command or file to check for existence
 # $2 - Command's website (e.g., download for binaries and source code)
+#
 # @return 0 - Command is missing
 # @return 1 - Command exists
 # -----------------------------------------------------------------------------
 required() {
   local result=0
   test -f "$1" || \
   command -v "$1" > /dev/null 2>&1 && result=1 || \
     warning "Missing: $1 ($2)"
   return ${result}
+}
 # -----------------------------------------------------------------------------
 # Show acceptable command-line arguments.
+#
 # @return 0 - Indicate script may not continue
 # -----------------------------------------------------------------------------
 utile_usage() {
   printf "Usage: %s [OPTIONS...]\n\n" "${SCRIPT_NAME}" >&2
   # Number of spaces to pad after the longest long argument.
   local -r PADDING=2
   # Determine the longest long argument to adjust spacing.
   local -r LEN=$(printf '%s\n' "${ARGUMENTS[@]}" | \
     awk -F"," '{print length($2)+'${PADDING}'}' | sort -n | tail -1)
   local duplicates
   for argument in "${ARGUMENTS[@]}"; do
     # Extract the short [0] and long [1] arguments and description [2].
     arg=("$(echo ${argument} | cut -d ',' -f1)" \
          "$(echo ${argument} | cut -d ',' -f2)" \
          "$(echo ${argument} | cut -d ',' -f3-)")
     duplicates+=("${arg[0]}")
     printf "  -%s, --%-${LEN}s%s\n" "${arg[0]}" "${arg[1]}" "${arg[2]}" >&2
   done
   # Sort the arguments to make sure no duplicates exist.
   duplicates=$(echo "${duplicates[@]}" | tr ' ' '\n' | sort | uniq -c -d)
   # Warn the developer that there's a duplicate command-line option.
   if [ -n "${duplicates}" ]; then
     # Trim all the whitespaces
     duplicates=$(echo "${duplicates}" | xargs echo -n)
     error "Duplicate command-line argument exists: ${duplicates}"
   fi
   return 0
+}
 # -----------------------------------------------------------------------------
 # Write coloured text to standard output.
+#
 # $1 - Text to write
 # $2 - Text's colour
 # -----------------------------------------------------------------------------
 coloured_text() {
   printf "%b%s%b\n" "$2" "$1" "${COLOUR_OFF}"
+}
 # -----------------------------------------------------------------------------
 # Write a warning message to standard output.
+#
 # $1 - Text to write
 # -----------------------------------------------------------------------------
 warning() {
   coloured_text "$1" "${COLOUR_WARNING}"
+}
 # -----------------------------------------------------------------------------
 # Write an error message to standard output.
+#
 # $1 - Text to write
 # -----------------------------------------------------------------------------
 error() {
   coloured_text "$1" "${COLOUR_ERROR}"
+}
 # -----------------------------------------------------------------------------
 # Write a timestamp and message to standard output.
+#
 # $1 - Text to write
 # -----------------------------------------------------------------------------
 utile_log() {
   printf "[%s] " "$(date +%H:%M:%S.%4N)"
   coloured_text "$1" "${COLOUR_LOGGING}"
+}
 # -----------------------------------------------------------------------------
 # Perform no operations.
+#
 # return 1 - Success
 # -----------------------------------------------------------------------------
 noop() {
   return 1
+}
 # -----------------------------------------------------------------------------
 # Exit the program with a given exit code.
+#
 # $1 - Exit code
 # -----------------------------------------------------------------------------
 terminate() {
   exit "$1"
+}
 # -----------------------------------------------------------------------------
 # Set global variables from command-line arguments.
 # -----------------------------------------------------------------------------
 arguments() {
   while [ "$#" -gt "0" ]; do
     local consume=1
     case "$1" in
       -V|--verbose)
         log=utile_log
       ;;
       -h|-\?|--help)
         usage=utile_usage
       ;;
       *)
         set +e
         argument "$@"
         consume=$?
         set -e
       ;;
     esac
     shift ${consume}
   done
+}
 # -----------------------------------------------------------------------------
 # Parses a single command-line argument. This must return a value greater
 # than or equal to 1, otherwise parsing the command-line arguments will
 # loop indefinitely.
+#
 # @return The number of arguments to consume (1 by default).
 # -----------------------------------------------------------------------------
 argument() {
   return 1
+}
 # ANSI colour escape sequences.
 readonly COLOUR_BLUE='\033[1;34m'
 readonly COLOUR_PINK='\033[1;35m'
 readonly COLOUR_DKGRAY='\033[30m'
 readonly COLOUR_DKRED='\033[31m'
 readonly COLOUR_LTRED='\033[1;31m'
 readonly COLOUR_YELLOW='\033[1;33m'
 readonly COLOUR_OFF='\033[0m'
 # Colour definitions used by script.
 COLOUR_LOGGING=${COLOUR_BLUE}
 COLOUR_WARNING=${COLOUR_YELLOW}
 COLOUR_ERROR=${COLOUR_LTRED}
 # Define required commands to check when script starts.
 DEPENDENCIES=(
   "awk,https://www.gnu.org/software/gawk/manual/gawk.html"
   "cut,https://www.gnu.org/software/coreutils"
+)
 # Define help for command-line arguments.
 ARGUMENTS=(
   "V,verbose,Log messages while processing"
   "h,help,Show this help message then exit"
+)
 # These functions may be set to utile delegates while parsing arguments.
 usage=noop
 log=noop

A scripts/font-names.sh

 #!/usr/bin/env bash
 # Outputs font names for all font files.
 find src/main/resources/fonts -type f \( -name "*otf" -o -name "*ttf" \) -exec \
   fc-scan --format "%{foundry}: %{family}\n" {} \; | uniq | sort

A scripts/icons.sh

 #!/bin/bash
 INKSCAPE="/usr/bin/inkscape"
 PNG_COMPRESS="optipng"
 PNG_COMPRESS_OPTS="-o9 *png"
 declare -a SIZES=("16" "32" "64" "128" "256" "512")
 for i in "${SIZES[@]}"; do
   # -y: export background opacity 0
   $INKSCAPE -y 0 -w "${i}" --export-overwrite --export-type=png -o "logo${i}.png" "logo.svg"
 done
 # Compess the PNG images.
 which $PNG_COMPRESS && $PNG_COMPRESS $PNG_COMPRESS_OPTS

A scripts/jsign-4.2.jar

Binary file

A scripts/localpath.bat

 @echo off
 set "OWNPATH=%~dp0"
 set "PLATFORM=mswin"
 if defined ProgramFiles(x86)                        set "PLATFORM=win64"
 if "%PROCESSOR_ARCHITECTURE%"=="AMD64"              set "PLATFORM=win64"
 if exist "%OWNPATH%tex\texmf-mswin\bin\context.exe" set "PLATFORM=mswin"
 if exist "%OWNPATH%tex\texmf-win64\bin\context.exe" set "PLATFORM=win64"
 set "TeXPath=%OWNPATH%tex\texmf-%PLATFORM%\bin"
 echo %PATH% | findstr "texmf-%PLATFORM%" > nul
 rem Only update the PATH if not previously updated
 if ERRORLEVEL 1 (
   setlocal enabledelayedexpansion
   set "Exists=false"
   set "Key=HKCU\Environment"
   for /F "USEBACKQ tokens=2*" %%A in (`reg query %%Key%% /v PATH 2^>nul`) do (
     if not "%%~B" == "" (
       set "Exists=true"
       rem Preserve the existing PATH
       echo %%B > currpath.txt
       rem Change the PATH environment variable
       setx PATH "%%B;%TeXPath%"
+    )
+  )
   rem The user-defined PATH does not exist, create it
   if "!Exists!" == "false" (
     rem Change the user PATH environment variable
     setx PATH "%TeXPath%"
+  )
   endlocal
   rem Update the current session
   set "PATH=%PATH%;%TeXPath%"
+)

A scripts/logo.ico

Binary file

A scripts/rcedit-x64.exe

Binary file

A scripts/squish.sh

 #!/usr/bin/env bash
 # TODO: This file does not work with Picocli and there are other issues.
 # TODO: Revisit after replacing Picocli and using FastR instead of Renjin.
 MODULES="${JAVA_HOME}/jmods/"
 LIBS=$(ls -1 ../libs/*jar | sed 's/\(.*\)/-libraryjars \1/g')
 java -jar ../tex/lib/proguard.jar \
   -libraryjars "${MODULES}java.base.jmod/(!**.jar;!module-info.class)" \
   -libraryjars "${MODULES}java.desktop.jmod/(!**.jar;!module-info.class)" \
   -libraryjars "${MODULES}java.xml.jmod/(!**.jar;!module-info.class)" \
   -libraryjars "${MODULES}javafx.controls.jmod/(!**.jar;!module-info.class)" \
   -libraryjars "${MODULES}javafx.graphics.jmod/(!**.jar;!module-info.class)" \
   ${LIBS} \
   -injars ../build/libs/keenwrite.jar \
   -outjars ../build/libs/keenwrite-min.jar \
   -keep 'class com.keenwrite.** { *; }' \
   -keep 'class com.whitemagicsoftware.tex.** { *; }' \
   -keep 'class org.renjin.** { *; }' \
   -keep 'class picocli.** { *; }' \
   -keep 'interface picocli.** { *; }' \
   -keep 'class picocli.CommandLine { *; }' \
   -keep 'class picocli.CommandLine$* { *; }' \
   -keepattributes '*Annotation*, Signature, Exception' \
   -keepclassmembers 'class * extends java.util.concurrent.Callable {
       public java.lang.Integer call();
   }' \
   -keepclassmembers 'class * {
       @javax.inject.Inject <init>(...);
       @picocli.CommandLine$Option *;
   }' \
   -keepclassmembers 'class * extends java.lang.Enum {
       <fields>;
       public static **[] values();
       public static ** valueOf(java.lang.String);
   }' \
   -keepnames \
     'class org.apache.lucene.analysis.tokenattributes.KeywordAttributeImpl' \
   -dontnote \
   -dontwarn \
   -dontoptimize \
   -dontobfuscate

A settings.gradle

A src/main/java/com/keenwrite/AppCommands.java

 package com.keenwrite;
 import com.keenwrite.cmdline.Arguments;
 import com.keenwrite.util.AlphanumComparator;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.concurrent.Callable;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.atomic.AtomicInteger;
 import static com.keenwrite.Launcher.terminate;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.processors.ProcessorFactory.createProcessors;
 import static com.keenwrite.util.FileWalker.walk;
 import static java.lang.System.lineSeparator;
 import static java.nio.file.Files.readString;
 import static java.nio.file.Files.writeString;
 import static java.util.concurrent.Executors.newFixedThreadPool;
 import static org.apache.commons.io.FilenameUtils.getExtension;
 /**
  * Responsible for executing common commands. These commands are shared by
  * both the graphical and the command-line interfaces.
  */
 public class AppCommands {
   private static final ExecutorService sExecutor = newFixedThreadPool( 1 );
   /**
    * Sci-fi genres, which are can be longer than other genres, typically fall
    * below 150,000 words at 6 chars per word. This reduces re-allocations of
    * memory when concatenating files together when exporting novels.
    */
   private static final int DOCUMENT_LENGTH = 150_000 * 6;
   private AppCommands() {
+  }
   public static void run( final Arguments args ) {
     final var exitCode = new AtomicInteger();
     final var future = new CompletableFuture<Path>() {
       @Override
       public boolean complete( final Path path ) {
         return super.complete( path );
+      }
       @Override
       public boolean completeExceptionally( final Throwable ex ) {
         clue( ex );
         exitCode.set( 1 );
         return super.completeExceptionally( ex );
+      }
     };
     file_export( args, future );
     sExecutor.shutdown();
     future.join();
     terminate( exitCode.get() );
+  }
   /**
    * Converts one or more files into the given file format. If {@code dir}
    * is set to true, this will first append all files in the same directory
    * as the actively edited file.
+   *
    * @param future Indicates whether the export succeeded or failed.
    */
   private static void file_export(
     final Arguments args, final CompletableFuture<Path> future ) {
     assert args != null;
     assert future != null;
     final Callable<Path> callableTask = () -> {
       try {
         final var context = args.createProcessorContext();
         final var concat = context.getConcatenate();
         final var inputPath = context.getSourcePath();
         final var outputPath = context.getTargetPath();
         final var chain = createProcessors( context );
         final var inputDoc = read( inputPath, concat );
         final var outputDoc = chain.apply( inputDoc );
         // Processors can export binary files. In such cases, processors will
         // return null to prevent further processing.
         final var result =
           outputDoc == null ? null : writeString( outputPath, outputDoc );
         future.complete( outputPath );
         return result;
       } catch( final Throwable ex ) {
         future.completeExceptionally( ex );
         return null;
+      }
     };
     // Prevent the application from blocking while the processor executes.
     sExecutor.submit( callableTask );
+  }
   /**
    * Concatenates all the files in the same directory as the given file into
    * a string. The extension is determined by the given file name pattern; the
    * order files are concatenated is based on their numeric sort order (this
    * avoids lexicographic sorting).
    * <p>
    * If the parent path to the file being edited in the text editor cannot
    * be found then this will return the editor's text, without iterating through
    * the parent directory. (Should never happen, but who knows?)
    * </p>
    * <p>
    * New lines are automatically appended to separate each file.
    * </p>
+   *
    * @param inputPath The path to the source file to read.
    * @param concat    {@code true} to concatenate all files with the same
    *                  extension as the source path.
    * @return All files in the same directory as the file being edited
    * concatenated into a single string.
    */
   private static String read( final Path inputPath, final boolean concat )
     throws IOException {
     final var parent = inputPath.getParent();
     final var filename = inputPath.getFileName().toString();
     final var extension = getExtension( filename );
     // Short-circuit because: only one file was requested; there is no parent
     // directory to scan for files; or there's no extension for globbing.
     if( !concat || parent == null || extension.isBlank() ) {
       return readString( inputPath );
+    }
     final var glob = "**/*." + extension;
     final var files = new ArrayList<Path>();
     walk( parent, glob, files::add );
     files.sort( new AlphanumComparator<>() );
     final var text = new StringBuilder( DOCUMENT_LENGTH );
     final var eol = lineSeparator();
     for( final var file : files ) {
       text.append( readString( file ) );
       text.append( eol );
+    }
     return text.toString();
+  }
+}

A src/main/java/com/keenwrite/Bootstrap.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import com.keenwrite.constants.Constants;
 import com.keenwrite.io.UserDataDir;
 import java.io.File;
 import java.io.InputStream;
 import java.nio.file.Path;
 import java.util.Calendar;
 import java.util.Properties;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Responsible for loading the bootstrap.properties file, which is
  * tactically located outside the standard resource reverse domain name
  * namespace to avoid hard-coding the application name in many places.
  * Instead, the application name is located in the bootstrap file, which is
  * then used to look up the remaining settings.
  * <p>
  * See {@link Constants#PATH_PROPERTIES_SETTINGS} for details.
  * </p>
  */
 public final class Bootstrap {
   private static final String PATH_BOOTSTRAP = "/bootstrap.properties";
   /**
    * Must be populated before deriving the app title (order matters).
    */
   private static final Properties sP = new Properties();
   public static String APP_TITLE;
   public static String APP_VERSION;
   public static String CONTAINER_VERSION;
   public static final String APP_TITLE_ABBR = "kwr";
   public static final String APP_TITLE_LOWERCASE;
   public static final String APP_VERSION_CLEAN;
   public static final String APP_YEAR;
   public static final Path USER_DATA_DIR;
   public static final File USER_CACHE_DIR;
   static {
     try( final var in = openResource( PATH_BOOTSTRAP ) ) {
       sP.load( in );
       APP_TITLE = sP.getProperty( "application.title" );
       CONTAINER_VERSION = sP.getProperty( "container.version" );
     } catch( final Exception ex ) {
       APP_TITLE = "KeenWrite";
       // Bootstrap properties cannot be found, use a default value.
       final var fmt = "Unable to load %s resource, applying defaults.%n";
       clue( ex, fmt, PATH_BOOTSTRAP );
       // There's no way to know what container version is compatible. This
       // value will cause a failure when downloading the container,
       CONTAINER_VERSION = "1.0.0";
+    }
     APP_TITLE_LOWERCASE = APP_TITLE.toLowerCase();
     try {
       APP_VERSION = Launcher.getVersion();
     } catch( final Exception ex ) {
       APP_VERSION = "0.0.0";
       // Application version cannot be found, use a default value.
       final var fmt = "Unable to determine application version.";
       clue( ex, fmt );
+    }
     // The plug-in that requests the version from the repository tag will
     // add a "dirty" number and indicator suffix. Removing it allows the
     // "clean" version to be used to pull a corresponding typesetter container.
     APP_VERSION_CLEAN = APP_VERSION.replaceAll( "-.*", "" );
     APP_YEAR = getYear();
     // This also sets the user agent for the SVG rendering library.
     System.setProperty( "http.agent", APP_TITLE + " " + APP_VERSION_CLEAN );
     USER_DATA_DIR = UserDataDir.getAppPath( APP_TITLE_LOWERCASE );
     USER_CACHE_DIR = USER_DATA_DIR.resolve( "cache" ).toFile();
     if( !USER_CACHE_DIR.exists() ) {
       final var ignored = USER_CACHE_DIR.mkdirs();
+    }
+  }
   @SuppressWarnings( "SameParameterValue" )
   private static InputStream openResource( final String path ) {
     return Constants.class.getResourceAsStream( path );
+  }
   private static String getYear() {
     return Integer.toString( Calendar.getInstance().get( Calendar.YEAR ) );
+  }
+}

A src/main/java/com/keenwrite/ExportFormat.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import com.keenwrite.io.MediaType;
 import com.keenwrite.io.MediaTypeExtension;
 import java.io.File;
 import java.nio.file.Path;
 import static java.lang.String.format;
 import static org.apache.commons.io.FilenameUtils.removeExtension;
 /**
  * Provides controls for processor behaviour when transforming input documents.
  */
 public enum ExportFormat {
   /**
    * For HTML exports, encode TeX as SVG. Treat image links relatively.
    */
   HTML_TEX_SVG( ".html" ),
   /**
    * For HTML exports, encode TeX using {@code $} delimiters, suitable for
    * rendering by an external TeX typesetting engine (or online with KaTeX).
    * Treat image links relatively.
    */
   HTML_TEX_DELIMITED( ".html" ),
   /**
    * For XHTML exports, encode TeX using {@code $} delimiters.
    */
   XHTML_TEX( ".xml" ),
   /**
    * Exports as PDF file format.
    */
   APPLICATION_PDF( ".pdf" ),
   /**
    * Indicates no special export format is to be created. No extension is
    * applicable. Image links must use absolute directories.
    */
   NONE( "" );
   /**
    * Preferred file name extension for the given file type.
    */
   private final String mExtension;
   /**
    * Looks up the {@link ExportFormat} based on the given path and subtype.
+   *
    * @param path     The type to find.
    * @param modifier The subtype to find (for HTML).
    * @return An object to control the output file format.
    * @throws IllegalArgumentException The type/subtype could not be found.
    */
   public static ExportFormat valueFrom( final Path path, final String modifier )
     throws IllegalArgumentException {
     assert path != null;
     return valueFrom( MediaType.valueFrom( path ), modifier );
+  }
   /**
    * Looks up the {@link ExportFormat} based on the given path and subtype.
+   *
    * @param extension The type to find.
    * @param modifier  The subtype to find (for HTML).
    * @return An object to control the output file format.
    * @throws IllegalArgumentException The type/subtype could not be found.
    */
   public static ExportFormat valueFrom(
     final String extension, final String modifier )
     throws IllegalArgumentException {
     assert extension != null;
     return valueFrom( MediaTypeExtension.fromExtension( extension ), modifier );
+  }
   /**
    * Looks up the {@link ExportFormat} based on the given path and subtype.
+   *
    * @param type     The media type to find.
    * @param modifier The subtype to find (for HTML).
    * @return An object to control the output file format.
    * @throws IllegalArgumentException The type/subtype could not be found.
    */
   public static ExportFormat valueFrom(
     final MediaType type, final String modifier ) {
     return switch( type ) {
       case TEXT_HTML, TEXT_XHTML -> "svg".equalsIgnoreCase( modifier.trim() )
         ? HTML_TEX_SVG
         : HTML_TEX_DELIMITED;
       case APP_PDF -> APPLICATION_PDF;
       default -> throw new IllegalArgumentException( format(
         "Unrecognized format type and subtype: '%s' and '%s'", type, modifier
       ) );
     };
+  }
   ExportFormat( final String extension ) {
     mExtension = extension;
+  }
   /**
    * Returns the given {@link File} with its extension replaced by one that
    * matches this {@link ExportFormat} extension.
+   *
    * @param file The file to perform an extension swap.
    * @return The given file with its extension replaced.
    */
   public File toExportFilename( final File file ) {
     return new File( removeExtension( file.getName() ) + mExtension );
+  }
   /**
    * Delegates to {@link #toExportFilename(File)} after converting the given
    * {@link Path} to an instance of {@link File}.
+   *
    * @param path The {@link Path} to convert to a {@link File}.
    * @return The given path with its extension replaced.
    */
   public File toExportFilename( final Path path ) {
     return toExportFilename( path.toFile() );
+  }
+}

A src/main/java/com/keenwrite/Launcher.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import com.keenwrite.cmdline.Arguments;
 import com.keenwrite.cmdline.ColourScheme;
 import com.keenwrite.cmdline.HeadlessApp;
 import picocli.CommandLine;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.Properties;
 import java.util.function.Consumer;
 import java.util.logging.LogManager;
 import static com.keenwrite.Bootstrap.*;
 import static com.keenwrite.security.PermissiveCertificate.installTrustManager;
 import static java.lang.String.format;
 import static picocli.CommandLine.IParameterExceptionHandler;
 import static picocli.CommandLine.ParameterException;
 import static picocli.CommandLine.UnmatchedArgumentException.printSuggestions;
 /**
  * Launches the application using the {@link MainApp} class.
+ *
  * <p>
  * This is required until modules are implemented, which may never happen
  * because the application should be ported away from Java and JavaFX.
  * </p>
  */
 public final class Launcher implements Consumer<Arguments> {
   /**
    * Needed for the GUI.
    */
   private final String[] mArgs;
   /**
    * Responsible for informing the user of an invalid command-line option,
    * along with suggestions as to the closest argument name that matches.
    */
   private static final class ArgHandler implements IParameterExceptionHandler {
     /**
      * Invoked by the command-line parser when an invalid option is provided.
+     *
      * @param ex   Captures information about the parameter.
      * @param args Captures the complete command-line arguments.
      * @return The application exit code (non-zero).
      */
     public int handleParseException(
       final ParameterException ex, final String[] args ) {
       final var cmd = ex.getCommandLine();
       final var writer = cmd.getErr();
       final var spec = cmd.getCommandSpec();
       final var mapper = cmd.getExitCodeExceptionMapper();
       writer.println( ex.getMessage() );
       printSuggestions( ex, writer );
       writer.print( cmd.getHelp().fullSynopsis() );
       writer.printf( "Run '%s --help' for details.%n", spec.qualifiedName() );
       return mapper == null
         ? spec.exitCodeOnInvalidInput()
         : mapper.getExitCode( ex );
+    }
+  }
   /**
    * Returns the application version number retrieved from the application
    * properties file. The properties file is generated at build time, which
    * keys off the repository.
+   *
    * @return The application version number.
    * @throws RuntimeException An {@link IOException} occurred.
    */
   public static String getVersion() {
     try {
       final var properties = loadProperties( "app.properties" );
       return properties.getProperty( "application.version" );
     } catch( final IOException ex ) {
       throw new RuntimeException( ex );
+    }
+  }
   /**
    * Immediately exits the application.
+   *
    * @param exitCode Code to provide back to the calling shell.
    */
   public static void terminate( final int exitCode ) {
     System.exit( exitCode );
+  }
   private static void parse( final String[] args ) {
     assert args != null;
     final var arguments = new Arguments( new Launcher( args ) );
     final var parser = new CommandLine( arguments );
     parser.setColorScheme( ColourScheme.create() );
     parser.setParameterExceptionHandler( new ArgHandler() );
     parser.setUnmatchedArgumentsAllowed( false );
     final var exitCode = parser.execute( args );
     final var parseResult = parser.getParseResult();
     if( parseResult.isUsageHelpRequested() ) {
       terminate( exitCode );
+    }
     else if( parseResult.isVersionHelpRequested() ) {
       showAppInfo();
       terminate( exitCode );
+    }
+  }
   @SuppressWarnings( "SameParameterValue" )
   private static Properties loadProperties( final String resource )
     throws IOException {
     final var properties = new Properties();
     properties.load( getResourceAsStream( getResourceName( resource ) ) );
     return properties;
+  }
   private static String getResourceName( final String resource ) {
     return format( "%s/%s", getPackagePath(), resource );
+  }
   private static String getPackagePath() {
     return Launcher.class.getPackageName().replace( '.', '/' );
+  }
   private static InputStream getResourceAsStream( final String resource ) {
     return Launcher.class.getClassLoader().getResourceAsStream( resource );
+  }
   /**
    * Logs the message of an error to the console.
+   *
    * @param error The fatal error that could not be handled.
    */
   private static void log( final Throwable error ) {
     var message = error.getMessage();
     if( message != null && message.toLowerCase().contains( "javafx" ) ) {
       message = "Run using a Java Runtime Environment that includes JavaFX.";
       out( "ERROR: %s", message );
+    }
     else {
       error.printStackTrace( System.err );
+    }
+  }
   /**
    * Suppress writing to standard error, suppresses writing log messages.
    */
   private static void disableLogging() {
     LogManager.getLogManager().reset();
     // TODO: Delete this after JavaFX/GTK 3 no longer barfs useless warnings.
     System.err.close();
+  }
   /**
    * Writes the given placeholder text to standard output with a new line
    * appended.
+   *
    * @param message The format string specifier.
    * @param args    The arguments to substitute into the format string.
    */
   private static void out( final String message, final Object... args ) {
     System.out.printf( format( "%s%n", message ), args );
+  }
   private static void showAppInfo() {
     out( "%n%s version %s", APP_TITLE, APP_VERSION );
     out( "Copyright 2016-%s White Magic Software, Ltd.", APP_YEAR );
     out( "Portions copyright 2015-2020 Karl Tauber.%n" );
+  }
   /**
    * Delegates running the application via the command-line argument parser.
    * This is the main entry point for the application, regardless of whether
    * run from the command-line or as a GUI.
+   *
    * @param args Command-line arguments.
    */
   public static void main( final String[] args ) {
     installTrustManager();
     parse( args );
+  }
   /**
    * @param args Command-line arguments (passed into the GUI).
    */
   public Launcher( final String[] args ) {
     mArgs = args;
+  }
   /**
    * Called after the arguments have been parsed.
+   *
    * @param args The parsed command-line arguments.
    */
   @Override
   public void accept( final Arguments args ) {
     assert args != null;
     try {
       int argCount = mArgs.length;
       if( args.quiet() ) {
         argCount--;
+      }
       else {
         showAppInfo();
+      }
       if( args.debug() ) {
         argCount--;
+      }
       else {
         disableLogging();
+      }
       if( argCount <= 0 ) {
         // When no command-line arguments are provided, launch the GUI.
         MainApp.main( mArgs );
+      }
       else {
         // When command-line arguments are supplied, run in headless mode.
         HeadlessApp.main( args );
+      }
     } catch( final Throwable t ) {
       log( t );
+    }
+  }
+}

A src/main/java/com/keenwrite/MainApp.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import com.keenwrite.cmdline.HeadlessApp;
 import com.keenwrite.events.HyperlinkOpenEvent;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.preview.MathRenderer;
 import com.keenwrite.spelling.impl.Lexicon;
 import javafx.application.Application;
 import javafx.event.Event;
 import javafx.event.EventType;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyEvent;
 import javafx.stage.Stage;
 import org.greenrobot.eventbus.Subscribe;
 import java.io.PrintStream;
 import java.util.function.BooleanSupplier;
 import static com.keenwrite.Bootstrap.APP_TITLE;
 import static com.keenwrite.constants.GraphicsConstants.LOGOS;
 import static com.keenwrite.events.Bus.register;
 import static com.keenwrite.preferences.AppKeys.*;
 import static com.keenwrite.util.FontLoader.initFonts;
 import static javafx.scene.input.KeyCode.ESCAPE;
 import static javafx.scene.input.KeyCode.F11;
 import static javafx.scene.input.KeyEvent.KEY_PRESSED;
 import static javafx.scene.input.KeyEvent.KEY_RELEASED;
 import static javafx.stage.WindowEvent.WINDOW_SHOWN;
 /**
  * Application entry point. The application allows users to edit plain text
  * files in a markup notation and see a real-time preview of the formatted
  * output.
  */
 public final class MainApp extends Application {
   private Workspace mWorkspace;
   private MainScene mMainScene;
   /**
    * TODO: Delete this after JavaFX/GTK 3 no longer barfs useless warnings.
    */
   @SuppressWarnings( "SameParameterValue" )
   private static void stderrRedirect( final PrintStream stream ) {
     System.setErr( stream );
+  }
   /**
    * GUI application entry point. See {@link HeadlessApp} for the entry
    * point to the command-line application.
+   *
    * @param args Command-line arguments.
    */
   public static void main( final String[] args ) {
     launch( args );
+  }
   /**
    * Creates an instance of {@link KeyEvent} that represents pressing a key.
+   *
    * @param code  The key to simulate being pressed down.
    * @param shift Whether shift key modifier shall modify the key code.
    * @return An instance of {@link KeyEvent} that may be used to simulate
    * a key being pressed.
    */
   public static Event keyDown( final KeyCode code, final boolean shift ) {
     return keyEvent( KEY_PRESSED, code, shift );
+  }
   /**
    * Creates an instance of {@link KeyEvent} that represents a key released
    * event without any modifier keys held.
+   *
    * @param code The key code representing a key to simulate releasing.
    * @return An instance of {@link KeyEvent}.
    */
   public static Event keyDown( final KeyCode code ) {
     return keyDown( code, false );
+  }
   /**
    * Creates an instance of {@link KeyEvent} that represents releasing a key.
+   *
    * @param code  The key to simulate being released up.
    * @param shift Whether shift key modifier shall modify the key code.
    * @return An instance of {@link KeyEvent} that may be used to simulate
    * a key being released.
    */
   @SuppressWarnings( "unused" )
   public static Event keyUp( final KeyCode code, final boolean shift ) {
     return keyEvent( KEY_RELEASED, code, shift );
+  }
   private static Event keyEvent(
     final EventType<KeyEvent> type, final KeyCode code, final boolean shift ) {
     return new KeyEvent(
       type, "", "", code, shift, false, false, false
     );
+  }
   /**
    * JavaFX entry point.
+   *
    * @param stage The primary application stage.
    */
   @Override
   public void start( final Stage stage ) {
     // Must be instantiated after the UI is initialized (i.e., not in main)
     // because it interacts with GUI properties.
     mWorkspace = new Workspace();
     // The locale was already loaded when the workspace was created. This
     // ensures that when the locale preference changes, a new spellchecker
     // instance will be loaded and applied.
     final var property = mWorkspace.localeProperty( KEY_LANGUAGE_LOCALE );
     property.addListener( ( c, o, n ) -> readLexicon() );
     initFonts();
     initState( stage );
     initStage( stage );
     initIcons( stage );
     initScene( stage );
     MathRenderer.bindSize( mWorkspace.doubleProperty( KEY_UI_FONT_MATH_SIZE ) );
     // Load the lexicon and check all the documents after all files are open.
     stage.addEventFilter( WINDOW_SHOWN, event -> readLexicon() );
     stage.show();
     stderrRedirect( System.out );
     register( this );
+  }
   private void initState( final Stage stage ) {
     final var enable = createBoundsEnabledSupplier( stage );
     stage.setX( mWorkspace.getDouble( KEY_UI_WINDOW_X ) );
     stage.setY( mWorkspace.getDouble( KEY_UI_WINDOW_Y ) );
     stage.setWidth( mWorkspace.getDouble( KEY_UI_WINDOW_W ) );
     stage.setHeight( mWorkspace.getDouble( KEY_UI_WINDOW_H ) );
     stage.setMaximized( mWorkspace.getBoolean( KEY_UI_WINDOW_MAX ) );
     stage.setFullScreen( mWorkspace.getBoolean( KEY_UI_WINDOW_FULL ) );
     mWorkspace.listen( KEY_UI_WINDOW_X, stage.xProperty(), enable );
     mWorkspace.listen( KEY_UI_WINDOW_Y, stage.yProperty(), enable );
     mWorkspace.listen( KEY_UI_WINDOW_W, stage.widthProperty(), enable );
     mWorkspace.listen( KEY_UI_WINDOW_H, stage.heightProperty(), enable );
     mWorkspace.listen( KEY_UI_WINDOW_MAX, stage.maximizedProperty() );
     mWorkspace.listen( KEY_UI_WINDOW_FULL, stage.fullScreenProperty() );
+  }
   private void initStage( final Stage stage ) {
     stage.setTitle( APP_TITLE );
     stage.addEventHandler( KEY_PRESSED, event -> {
       if( F11.equals( event.getCode() ) ) {
         stage.setFullScreen( !stage.isFullScreen() );
+      }
     } );
     // After the app loses focus, when the user switches back using Alt+Tab,
     // the menu is engaged on Windows. Simulate an ESC keypress to the menu
     // to disable the menu, giving focus back to the application proper.
     //
     // JavaFX Bug: https://bugs.openjdk.java.net/browse/JDK-8090647
     stage.focusedProperty().addListener( ( c, lost, found ) -> {
       if( found ) {
         mMainScene.getMenuBar().fireEvent( keyDown( ESCAPE ) );
+      }
     } );
+  }
   private void initIcons( final Stage stage ) {
     stage.getIcons().addAll( LOGOS );
+  }
   private void initScene( final Stage stage ) {
     mMainScene = new MainScene( mWorkspace );
     stage.setScene( mMainScene.getScene() );
+  }
   /**
    * When a hyperlink website URL is clicked, this method is called to launch
    * the default browser to the event's location.
+   *
    * @param event The event called when a hyperlink was clicked.
    */
   @Subscribe
   public void handle( final HyperlinkOpenEvent event ) {
     getHostServices().showDocument( event.getUri().toString() );
+  }
   /**
    * This will load the lexicon for the user's preferred locale and fire
    * an event when the all entries in the lexicon have been loaded.
    */
   private void readLexicon() {
     Lexicon.read( mWorkspace.getLocale() );
+  }
   /**
    * When the window is maximized, full screen, or iconified, prevent updating
    * the window bounds. This is used so that if the user exits the application
    * when full screen (or maximized), restarting the application will recall
    * the previous bounds, allowing for continuity of expected behaviour.
+   *
    * @param stage The window to check for "normal" status.
    * @return {@code false} when the bounds must not be changed, ergo persisted.
    */
   private BooleanSupplier createBoundsEnabledSupplier( final Stage stage ) {
     return () ->
       !(stage.isMaximized() || stage.isFullScreen() || stage.isIconified());
+  }
+}

A src/main/java/com/keenwrite/MainPane.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import com.keenwrite.editors.TextDefinition;
 import com.keenwrite.editors.TextEditor;
 import com.keenwrite.editors.TextResource;
 import com.keenwrite.editors.common.ScrollEventHandler;
 import com.keenwrite.editors.common.VariableNameInjector;
 import com.keenwrite.editors.definition.DefinitionEditor;
 import com.keenwrite.editors.definition.TreeTransformer;
 import com.keenwrite.editors.definition.yaml.YamlTreeTransformer;
 import com.keenwrite.editors.markdown.MarkdownEditor;
 import com.keenwrite.events.*;
 import com.keenwrite.events.spelling.LexiconLoadedEvent;
 import com.keenwrite.io.MediaType;
 import com.keenwrite.io.MediaTypeExtension;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.preview.HtmlPreview;
 import com.keenwrite.processors.HtmlPreviewProcessor;
 import com.keenwrite.processors.Processor;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.ProcessorFactory;
 import com.keenwrite.processors.r.Engine;
 import com.keenwrite.processors.r.RBootstrapController;
 import com.keenwrite.service.events.Notifier;
 import com.keenwrite.spelling.api.SpellChecker;
 import com.keenwrite.spelling.impl.PermissiveSpeller;
 import com.keenwrite.spelling.impl.SymSpellSpeller;
 import com.keenwrite.typesetting.installer.TypesetterInstaller;
 import com.keenwrite.ui.explorer.FilePickerFactory;
 import com.keenwrite.ui.heuristics.DocumentStatistics;
 import com.keenwrite.ui.outline.DocumentOutline;
 import com.keenwrite.ui.spelling.TextEditorSpellChecker;
 import com.keenwrite.util.GenericBuilder;
 import com.panemu.tiwulfx.control.dock.DetachableTab;
 import com.panemu.tiwulfx.control.dock.DetachableTabPane;
 import javafx.application.Platform;
 import javafx.beans.property.*;
 import javafx.collections.ListChangeListener;
 import javafx.concurrent.Task;
 import javafx.event.ActionEvent;
 import javafx.event.Event;
 import javafx.event.EventHandler;
 import javafx.scene.Node;
 import javafx.scene.Scene;
 import javafx.scene.control.SplitPane;
 import javafx.scene.control.Tab;
 import javafx.scene.control.TabPane;
 import javafx.scene.control.Tooltip;
 import javafx.scene.control.TreeItem.TreeModificationEvent;
 import javafx.scene.input.KeyEvent;
 import javafx.stage.Stage;
 import javafx.stage.Window;
 import org.greenrobot.eventbus.Subscribe;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.nio.file.Path;
 import java.util.*;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 import static com.keenwrite.ExportFormat.NONE;
 import static com.keenwrite.Launcher.terminate;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.Constants.*;
 import static com.keenwrite.events.Bus.register;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.io.MediaType.*;
 import static com.keenwrite.io.MediaType.TypeName.TEXT;
 import static com.keenwrite.preferences.AppKeys.*;
 import static com.keenwrite.processors.IdentityProcessor.IDENTITY;
 import static com.keenwrite.processors.ProcessorContext.Mutator;
 import static com.keenwrite.processors.ProcessorContext.builder;
 import static com.keenwrite.processors.ProcessorFactory.createProcessors;
 import static java.awt.Desktop.getDesktop;
 import static java.util.concurrent.Executors.newFixedThreadPool;
 import static java.util.concurrent.Executors.newScheduledThreadPool;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static java.util.stream.Collectors.groupingBy;
 import static javafx.application.Platform.runLater;
 import static javafx.scene.control.ButtonType.NO;
 import static javafx.scene.control.ButtonType.YES;
 import static javafx.scene.control.TabPane.TabClosingPolicy.ALL_TABS;
 import static javafx.scene.input.KeyCode.ENTER;
 import static javafx.scene.input.KeyCode.SPACE;
 import static javafx.scene.input.KeyCombination.ALT_DOWN;
 import static javafx.scene.input.KeyCombination.CONTROL_DOWN;
 import static javafx.util.Duration.millis;
 import static javax.swing.SwingUtilities.invokeLater;
 import static org.fxmisc.wellbehaved.event.EventPattern.keyPressed;
 /**
  * Responsible for wiring together the main application components for a
  * particular {@link Workspace} (project). These include the definition views,
  * text editors, and preview pane along with any corresponding controllers.
  */
 public final class MainPane extends SplitPane {
   private static final ExecutorService sExecutor = newFixedThreadPool( 1 );
   private static final Notifier sNotifier = Services.load( Notifier.class );
   /**
    * Used when opening files to determine how each file should be binned and
    * therefore what tab pane to be opened within.
    */
   private static final Set<MediaType> PLAIN_TEXT_FORMAT = Set.of(
     TEXT_MARKDOWN, TEXT_R_MARKDOWN, UNDEFINED
   );
   private final ScheduledExecutorService mSaver = newScheduledThreadPool( 1 );
   private final AtomicReference<ScheduledFuture<?>> mSaveTask =
     new AtomicReference<>();
   /**
    * Prevents re-instantiation of processing classes.
    */
   private final Map<TextResource, Processor<String>> mProcessors =
     new HashMap<>();
   private final Workspace mWorkspace;
   /**
    * Groups similar file type tabs together.
    */
   private final List<TabPane> mTabPanes = new ArrayList<>();
   /**
    * Renders the actively selected plain text editor tab.
    */
   private final HtmlPreview mPreview;
   /**
    * Provides an interactive document outline.
    */
   private final DocumentOutline mOutline = new DocumentOutline();
   /**
    * Changing the active editor fires the value changed event. This allows
    * refreshes to happen when external definitions are modified and need to
    * trigger the processing chain.
    */
   private final ObjectProperty<TextEditor> mTextEditor =
     createActiveTextEditor();
   /**
    * Changing the active definition editor fires the value changed event. This
    * allows refreshes to happen when external definitions are modified and need
    * to trigger the processing chain.
    */
   private final ObjectProperty<TextDefinition> mDefinitionEditor;
   private final ObjectProperty<SpellChecker> mSpellChecker;
   private final TextEditorSpellChecker mEditorSpeller;
   /**
    * Called when the definition data is changed.
    */
   private final EventHandler<TreeModificationEvent<Event>> mTreeHandler =
     event -> {
       process( getTextEditor() );
       save( getTextDefinition() );
     };
   /**
    * Tracks the number of detached tab panels opened into their own windows,
    * which allows unique identification of subordinate windows by their title.
    * It is doubtful more than 128 windows, much less 256, will be created.
    */
   private byte mWindowCount;
   private final VariableNameInjector mVariableNameInjector;
   private final RBootstrapController mRBootstrapController;
   private final DocumentStatistics mStatistics;
   @SuppressWarnings( {"FieldCanBeLocal", "unused"} )
   private final TypesetterInstaller mInstallWizard;
   /**
    * Adds all content panels to the main user interface. This will load the
    * configuration settings from the workspace to reproduce the settings from
    * a previous session.
    */
   public MainPane( final Workspace workspace ) {
     mWorkspace = workspace;
     mSpellChecker = createSpellChecker();
     mEditorSpeller = createTextEditorSpellChecker( mSpellChecker );
     mPreview = new HtmlPreview( workspace );
     mStatistics = new DocumentStatistics( workspace );
     mTextEditor.set( createMarkdownEditor( DOCUMENT_DEFAULT ) );
     mDefinitionEditor = createActiveDefinitionEditor( mTextEditor );
     mVariableNameInjector = new VariableNameInjector( mWorkspace );
     mRBootstrapController = new RBootstrapController(
       mWorkspace, this::getDefinitions );
     open( collect( getRecentFiles() ) );
     viewPreview();
     setDividerPositions( calculateDividerPositions() );
     // Once the main scene's window regains focus, update the active definition
     // editor to the currently selected tab.
     runLater( () -> getWindow().setOnCloseRequest( event -> {
       // Order matters: Open file names must be persisted before closing all.
       mWorkspace.save();
       if( closeAll() ) {
         Platform.exit();
         terminate( 0 );
+      }
       event.consume();
     } ) );
     register( this );
     initAutosave( workspace );
     restoreSession();
     runLater( this::restoreFocus );
     mInstallWizard = new TypesetterInstaller( workspace );
+  }
   /**
    * Called when spellchecking can be run. This will reload the dictionary
    * into memory once, and then re-use it for all the existing text editors.
+   *
    * @param event The event to process, having a populated word-frequency map.
    */
   @Subscribe
   public void handle( final LexiconLoadedEvent event ) {
     final var lexicon = event.getLexicon();
     try {
       final var checker = SymSpellSpeller.forLexicon( lexicon );
       mSpellChecker.set( checker );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   @Subscribe
   public void handle( final TextEditorFocusEvent event ) {
     mTextEditor.set( event.get() );
+  }
   @Subscribe
   public void handle( final TextDefinitionFocusEvent event ) {
     mDefinitionEditor.set( event.get() );
+  }
   /**
    * Typically called when a file name is clicked in the preview panel.
+   *
    * @param event The event to process, must contain a valid file reference.
    */
   @Subscribe
   public void handle( final FileOpenEvent event ) {
     final File eventFile;
     final var eventUri = event.getUri();
     if( eventUri.isAbsolute() ) {
       eventFile = new File( eventUri.getPath() );
+    }
     else {
       final var activeFile = getTextEditor().getFile();
       final var parent = activeFile.getParentFile();
       if( parent == null ) {
         clue( new FileNotFoundException( eventUri.getPath() ) );
         return;
+      }
       else {
         final var parentPath = parent.getAbsolutePath();
         eventFile = Path.of( parentPath, eventUri.getPath() ).toFile();
+      }
+    }
     final var mediaType = MediaTypeExtension.fromFile( eventFile );
     runLater( () -> {
       // Open text files locally.
       if( mediaType.isType( TEXT ) ) {
         open( eventFile );
+      }
       else {
         try {
           // Delegate opening all other file types to the operating system.
           getDesktop().open( eventFile );
         } catch( final Exception ex ) {
           clue( ex );
+        }
+      }
     } );
+  }
   @Subscribe
   public void handle( final CaretNavigationEvent event ) {
     runLater( () -> {
       final var textArea = getTextEditor();
       textArea.moveTo( event.getOffset() );
       textArea.requestFocus();
     } );
+  }
   @Subscribe
   public void handle( final InsertDefinitionEvent<String> event ) {
     final var leaf = event.getLeaf();
     final var editor = mTextEditor.get();
     mVariableNameInjector.insert( editor, leaf );
+  }
   private void initAutosave( final Workspace workspace ) {
     final var rate = workspace.integerProperty( KEY_EDITOR_AUTOSAVE );
     rate.addListener(
       ( c, o, n ) -> {
         final var taskRef = mSaveTask.get();
         // Prevent multiple autosaves from running.
         if( taskRef != null ) {
           taskRef.cancel( false );
+        }
         initAutosave( rate );
+      }
     );
     // Start the save listener (avoids duplicating some code).
     initAutosave( rate );
+  }
   private void initAutosave( final IntegerProperty rate ) {
     mSaveTask.set(
       mSaver.scheduleAtFixedRate(
         () -> {
           if( getTextEditor().isModified() ) {
             // Ensure the modified indicator is cleared by running on EDT.
             runLater( this::save );
+          }
         }, 0, rate.intValue(), SECONDS
+      )
     );
+  }
   /**
    * TODO: Load divider positions from exported settings, see
    *   {@link #collect(SetProperty)} comment.
    */
   private double[] calculateDividerPositions() {
     final var ratio = 100f / getItems().size() / 100;
     final var positions = getDividerPositions();
     for( int i = 0; i < positions.length; i++ ) {
       positions[ i ] = ratio * i;
+    }
     return positions;
+  }
   /**
    * Opens all the files into the application, provided the paths are unique.
    * This may only be called for any type of files that a user can edit
    * (i.e., update and persist), such as definitions and text files.
+   *
    * @param files The list of files to open.
    */
   public void open( final List<File> files ) {
     files.forEach( this::open );
+  }
   /**
    * This opens the given file. Since the preview pane is not a file that
    * can be opened, it is safe to add a listener to the detachable pane.
    * This will exit early if the given file is not a regular file (i.e., a
    * directory).
+   *
    * @param inputFile The file to open.
    */
   private void open( final File inputFile ) {
     // Prevent opening directories (a non-existent "untitled.md" is fine).
     if( !inputFile.isFile() && inputFile.exists() ) {
       return;
+    }
     final var tab = createTab( inputFile );
     final var node = tab.getContent();
     final var mediaType = MediaType.valueFrom( inputFile );
     final var tabPane = obtainTabPane( mediaType );
     tab.setTooltip( createTooltip( inputFile ) );
     tabPane.setFocusTraversable( false );
     tabPane.setTabClosingPolicy( ALL_TABS );
     tabPane.getTabs().add( tab );
     // Attach the tab scene factory for new tab panes.
     if( !getItems().contains( tabPane ) ) {
       addTabPane(
         node instanceof TextDefinition ? 0 : getItems().size(), tabPane
       );
+    }
     if( inputFile.isFile() ) {
       getRecentFiles().add( inputFile.getAbsolutePath() );
+    }
+  }
   /**
    * Gives focus to the most recently edited document and attempts to move
    * the caret to the most recently known offset into said document.
    */
   private void restoreSession() {
     final var workspace = getWorkspace();
     final var file = workspace.fileProperty( KEY_UI_RECENT_DOCUMENT );
     final var offset = workspace.integerProperty( KEY_UI_RECENT_OFFSET );
     for( final var pane : mTabPanes ) {
       for( final var tab : pane.getTabs() ) {
         final var tooltip = tab.getTooltip();
         if( tooltip != null ) {
           final var tabName = tooltip.getText();
           final var fileName = file.getValue().toString();
           if( tabName.equalsIgnoreCase( fileName ) ) {
             final var node = tab.getContent();
             pane.getSelectionModel().select( tab );
             node.requestFocus();
             if( node instanceof TextEditor editor ) {
               editor.moveTo( offset.getValue() );
+            }
             break;
+          }
+        }
+      }
+    }
+  }
   /**
    * Sets the focus to the middle pane, which contains the text editor tabs.
    */
   private void restoreFocus() {
     // Work around a bug where focusing directly on the middle pane results
     // in the R engine not loading variables properly.
     mTabPanes.get( 0 ).requestFocus();
     // This is the only line that should be required.
     mTabPanes.get( 1 ).requestFocus();
+  }
   /**
    * Opens a new text editor document using the default document file name.
    */
   public void newTextEditor() {
     open( DOCUMENT_DEFAULT );
+  }
   /**
    * Opens a new definition editor document using the default definition
    * file name.
    */
   public void newDefinitionEditor() {
     open( DEFINITION_DEFAULT );
+  }
   /**
    * Iterates over all tab panes to find all {@link TextEditor}s and request
    * that they save themselves.
    */
   public void saveAll() {
     iterateEditors( this::save );
+  }
   /**
    * Requests that the active {@link TextEditor} saves itself. Don't bother
    * checking if modified first because if the user swaps external media from
    * an external source (e.g., USB thumb drive), save should not second-guess
    * the user: save always re-saves. Also, it's less code.
    */
   public void save() {
     save( getTextEditor() );
+  }
   /**
    * Saves the active {@link TextEditor} under a new name.
+   *
    * @param files The new active editor {@link File} reference, must contain
    *              at least one element.
    */
   public void saveAs( final List<File> files ) {
     assert files != null;
     assert !files.isEmpty();
     final var editor = getTextEditor();
     final var tab = getTab( editor );
     final var file = files.get( 0 );
     // If the file type has changed, refresh the processors.
     final var mediaType = MediaType.valueFrom( file );
     final var typeChanged = !editor.isMediaType( mediaType );
     if( typeChanged ) {
       removeProcessor( editor );
+    }
     editor.rename( file );
     tab.ifPresent( t -> {
       t.setText( editor.getFilename() );
       t.setTooltip( createTooltip( file ) );
     } );
     if( typeChanged ) {
       updateProcessors( editor );
       process( editor );
+    }
     save();
+  }
   /**
    * Saves the given {@link TextResource} to a file. This is typically used
    * to save either an instance of {@link TextEditor} or {@link TextDefinition}.
+   *
    * @param resource The resource to export.
    */
   private void save( final TextResource resource ) {
     try {
       resource.save();
     } catch( final Exception ex ) {
       clue( ex );
       sNotifier.alert(
         getWindow(), resource.getPath(), "TextResource.saveFailed", ex
       );
+    }
+  }
   /**
    * Closes all open {@link TextEditor}s; all {@link TextDefinition}s stay open.
+   *
    * @return {@code true} when all editors, modified or otherwise, were
    * permitted to close; {@code false} when one or more editors were modified
    * and the user requested no closing.
    */
   public boolean closeAll() {
     var closable = true;
     for( final var tabPane : mTabPanes ) {
       final var tabIterator = tabPane.getTabs().iterator();
       while( tabIterator.hasNext() ) {
         final var tab = tabIterator.next();
         final var resource = tab.getContent();
         // The definition panes auto-save, so being specific here prevents
         // closing the definitions in the situation where the user wants to
         // continue editing (i.e., possibly save unsaved work).
         if( !(resource instanceof TextEditor) ) {
           continue;
+        }
         if( canClose( (TextEditor) resource ) ) {
           tabIterator.remove();
           close( tab );
+        }
         else {
           closable = false;
+        }
+      }
+    }
     return closable;
+  }
   /**
    * Calls the tab's {@link Tab#getOnClosed()} handler to carry out a close
    * event.
+   *
    * @param tab The {@link Tab} that was closed.
    */
   private void close( final Tab tab ) {
     assert tab != null;
     final var handler = tab.getOnClosed();
     if( handler != null ) {
       handler.handle( new ActionEvent() );
+    }
+  }
   /**
    * Closes the active tab; delegates to {@link #canClose(TextResource)}.
    */
   public void close() {
     final var editor = getTextEditor();
     if( canClose( editor ) ) {
       close( editor );
+    }
+  }
   /**
    * Closes the given {@link TextResource}. This must not be called from within
    * a loop that iterates over the tab panes using {@code forEach}, lest a
    * concurrent modification exception be thrown.
+   *
    * @param resource The {@link TextResource} to close, without confirming with
    *                 the user.
    */
   private void close( final TextResource resource ) {
     getTab( resource ).ifPresent(
       tab -> {
         close( tab );
         tab.getTabPane().getTabs().remove( tab );
+      }
     );
+  }
   /**
    * Answers whether the given {@link TextResource} may be closed.
+   *
    * @param editor The {@link TextResource} to try closing.
    * @return {@code true} when the editor may be closed; {@code false} when
    * the user has requested to keep the editor open.
    */
   private boolean canClose( final TextResource editor ) {
     final var editorTab = getTab( editor );
     final var canClose = new AtomicBoolean( true );
     if( editor.isModified() ) {
       final var filename = new StringBuilder();
       editorTab.ifPresent( tab -> filename.append( tab.getText() ) );
       final var message = sNotifier.createNotification(
         Messages.get( "Alert.file.close.title" ),
         Messages.get( "Alert.file.close.text" ),
         filename.toString()
       );
       final var dialog = sNotifier.createConfirmation( getWindow(), message );
       dialog.showAndWait().ifPresent(
         save -> canClose.set( save == YES ? editor.save() : save == NO )
       );
+    }
     return canClose.get();
+  }
   private void iterateEditors( final Consumer<TextEditor> consumer ) {
     mTabPanes.forEach(
       tp -> tp.getTabs().forEach( tab -> {
         final var node = tab.getContent();
         if( node instanceof final TextEditor editor ) {
           consumer.accept( editor );
+        }
       } )
     );
+  }
   private ObjectProperty<TextEditor> createActiveTextEditor() {
     final var editor = new SimpleObjectProperty<TextEditor>();
     editor.addListener( ( c, o, n ) -> {
       if( n != null ) {
         mPreview.setBaseUri( n.getPath() );
         process( n );
+      }
     } );
     return editor;
+  }
   /**
    * Adds the HTML preview tab to its own, singular tab pane.
    */
   public void viewPreview() {
     viewTab( mPreview, TEXT_HTML, "Pane.preview.title" );
+  }
   /**
    * Adds the document outline tab to its own, singular tab pane.
    */
   public void viewOutline() {
     viewTab( mOutline, APP_DOCUMENT_OUTLINE, "Pane.outline.title" );
+  }
   public void viewStatistics() {
     viewTab( mStatistics, APP_DOCUMENT_STATISTICS, "Pane.statistics.title" );
+  }
   public void viewFiles() {
     try {
       final var factory = new FilePickerFactory( getWorkspace() );
       final var fileManager = factory.createModeless();
       viewTab( fileManager, APP_FILE_MANAGER, "Pane.files.title" );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   private void viewTab(
     final Node node, final MediaType mediaType, final String key ) {
     final var tabPane = obtainTabPane( mediaType );
     for( final var tab : tabPane.getTabs() ) {
       if( tab.getContent() == node ) {
         return;
+      }
+    }
     tabPane.getTabs().add( createTab( get( key ), node ) );
     addTabPane( tabPane );
+  }
   public void viewRefresh() {
     mPreview.refresh();
     Engine.clear();
     mRBootstrapController.update();
+  }
   /**
    * Returns the tab that contains the given {@link TextEditor}.
+   *
    * @param editor The {@link TextEditor} instance to find amongst the tabs.
    * @return The first tab having content that matches the given tab.
    */
   private Optional<Tab> getTab( final TextResource editor ) {
     return mTabPanes.stream()
                     .flatMap( pane -> pane.getTabs().stream() )
                     .filter( tab -> editor.equals( tab.getContent() ) )
                     .findFirst();
+  }
   /**
    * Creates a new {@link DefinitionEditor} wrapped in a listener that
    * is used to detect when the active {@link DefinitionEditor} has changed.
    * Upon changing, the variables are interpolated and the active text editor
    * is refreshed.
+   *
    * @param textEditor Text editor to update with the revised resolved map.
    * @return A newly configured property that represents the active
    * {@link DefinitionEditor}, never null.
    */
   private ObjectProperty<TextDefinition> createActiveDefinitionEditor(
     final ObjectProperty<TextEditor> textEditor ) {
     final var defEditor = new SimpleObjectProperty<>(
       createDefinitionEditor()
     );
     defEditor.addListener( ( c, o, n ) -> {
       final var editor = textEditor.get();
       if( editor.isMediaType( TEXT_R_MARKDOWN ) ) {
         // Initialize R before the editor is added.
         mRBootstrapController.update();
+      }
       process( editor );
     } );
     return defEditor;
+  }
   private Tab createTab( final String filename, final Node node ) {
     return new DetachableTab( filename, node );
+  }
   private Tab createTab( final File file ) {
     final var r = createTextResource( file );
     final var tab = createTab( r.getFilename(), r.getNode() );
     r.modifiedProperty().addListener(
       ( c, o, n ) -> tab.setText( r.getFilename() + (n ? "*" : "") )
     );
     // This is called when either the tab is closed by the user clicking on
     // the tab's close icon or when closing (all) from the file menu.
     tab.setOnClosed(
       __ -> getRecentFiles().remove( file.getAbsolutePath() )
     );
     // When closing a tab, give focus to the newly revealed tab.
     tab.selectedProperty().addListener( ( c, o, n ) -> {
       if( n != null && n ) {
         final var pane = tab.getTabPane();
         if( pane != null ) {
           pane.requestFocus();
+        }
+      }
     } );
     tab.tabPaneProperty().addListener( ( cPane, oPane, nPane ) -> {
       if( nPane != null ) {
         nPane.focusedProperty().addListener( ( c, o, n ) -> {
           if( n != null && n ) {
             final var selected = nPane.getSelectionModel().getSelectedItem();
             final var node = selected.getContent();
             node.requestFocus();
+          }
         } );
+      }
     } );
     return tab;
+  }
   /**
    * Creates bins for the different {@link MediaType}s, which eventually are
    * added to the UI as separate tab panes. If ever a general-purpose scene
    * exporter is developed to serialize a scene to an FXML file, this could
    * be replaced by such a class.
    * <p>
    * When binning the files, this makes sure that at least one file exists
    * for every type. If the user has opted to close a particular type (such
    * as the definition pane), the view will suppressed elsewhere.
    * </p>
    * <p>
    * The order that the binned files are returned will be reflected in the
    * order that the corresponding panes are rendered in the UI.
    * </p>
+   *
    * @param paths The file paths to bin according to their type.
    * @return An in-order list of files, first by structured definition files,
    * then by plain text documents.
    */
   private List<File> collect( final SetProperty<String> paths ) {
     // Treat all files destined for the text editor as plain text documents
     // so that they are added to the same pane. Grouping by TEXT_PLAIN is a
     // bit arbitrary, but means explicitly capturing TEXT_PLAIN isn't needed.
     final Function<MediaType, MediaType> bin =
       m -> PLAIN_TEXT_FORMAT.contains( m ) ? TEXT_PLAIN : m;
     // Create two groups: YAML files and plain text files. The order that
     // the elements are listed in the enumeration for media types determines
     // what files are loaded first. Variable definitions come before all other
     // plain text documents.
     final var bins = paths
       .stream()
       .collect(
         groupingBy(
           path -> bin.apply( MediaType.fromFilename( path ) ),
           () -> new TreeMap<>( Enum::compareTo ),
           Collectors.toList()
+        )
       );
     bins.putIfAbsent( TEXT_YAML, List.of( DEFINITION_DEFAULT.toString() ) );
     bins.putIfAbsent( TEXT_PLAIN, List.of( DOCUMENT_DEFAULT.toString() ) );
     final var result = new LinkedList<File>();
     // Ensure that the same types are listed together (keep insertion order).
     bins.forEach( ( mediaType, files ) -> result.addAll(
       files.stream().map( File::new ).toList() )
     );
     return result;
+  }
   /**
    * Force the active editor to update, which will cause the processor
    * to re-evaluate the interpolated definition map thereby updating the
    * preview pane.
+   *
    * @param editor Contains the source document to update in the preview pane.
    */
   private void process( final TextEditor editor ) {
     // Ensure processing does not run on the JavaFX thread, which frees the
     // text editor immediately for caret movement. The preview will have a
     // slight delay when catching up to the caret position.
     final var task = new Task<Void>() {
       @Override
       public Void call() {
         try {
           final var p = mProcessors.getOrDefault( editor, IDENTITY );
           p.apply( editor == null ? "" : editor.getText() );
         } catch( final Exception ex ) {
           clue( ex );
+        }
         return null;
+      }
     };
     // TODO: Each time the editor successfully runs the processor the task is
     //   considered successful. Due to the rapid-fire nature of processing
     //   (e.g., keyboard navigation, fast typing), it isn't necessary to
     //   scroll each time.
     //   The algorithm:
     //   1. Peek at the oldest time.
     //   2. If the difference between the oldest time and current time exceeds
     //      250 milliseconds, then invoke the scrolling.
     //   3. Insert the current time into the circular queue.
     task.setOnSucceeded(
       e -> invokeLater( () -> mPreview.scrollTo( CARET_ID ) )
     );
     // Prevents multiple process requests from executing simultaneously (due
     // to having a restricted queue size).
     sExecutor.execute( task );
+  }
   /**
    * Lazily creates a {@link TabPane} configured to listen for tab select
    * events. The tab pane is associated with a given media type so that
    * similar files can be grouped together.
+   *
    * @param mediaType The media type to associate with the tab pane.
    * @return An instance of {@link TabPane} that will handle tab docking.
    */
   private TabPane obtainTabPane( final MediaType mediaType ) {
     for( final var pane : mTabPanes ) {
       for( final var tab : pane.getTabs() ) {
         final var node = tab.getContent();
         if( node instanceof TextResource r && r.supports( mediaType ) ) {
           return pane;
+        }
+      }
+    }
     final var pane = createTabPane();
     mTabPanes.add( pane );
     return pane;
+  }
   /**
    * Creates an initialized {@link TabPane} instance.
+   *
    * @return A new {@link TabPane} with all listeners configured.
    */
   private TabPane createTabPane() {
     final var tabPane = new DetachableTabPane();
     initStageOwnerFactory( tabPane );
     initTabListener( tabPane );
     return tabPane;
+  }
   /**
    * When any {@link DetachableTabPane} is detached from the main window,
    * the stage owner factory must be given its parent window, which will
    * own the child window. The parent window is the {@link MainPane}'s
    * {@link Scene}'s {@link Window} instance.
+   *
    * <p>
    * This will derives the new title from the main window title, incrementing
    * the window count to help uniquely identify the child windows.
    * </p>
+   *
    * @param tabPane A new {@link DetachableTabPane} to configure.
    */
   private void initStageOwnerFactory( final DetachableTabPane tabPane ) {
     tabPane.setStageOwnerFactory( stage -> {
       final var title = get(
         "Detach.tab.title",
         ((Stage) getWindow()).getTitle(), ++mWindowCount
       );
       stage.setTitle( title );
       return getScene().getWindow();
     } );
+  }
   /**
    * Responsible for configuring the content of each {@link DetachableTab} when
    * it is added to the given {@link DetachableTabPane} instance.
    * <p>
    * For {@link TextEditor} contents, an instance of {@link ScrollEventHandler}
    * is initialized to perform synchronized scrolling between the editor and
    * its preview window. Additionally, the last tab in the tab pane's list of
    * tabs is given focus.
    * </p>
    * <p>
    * Note that multiple tabs can be added simultaneously.
    * </p>
+   *
    * @param tabPane A new {@link TabPane} to configure.
    */
   private void initTabListener( final TabPane tabPane ) {
     tabPane.getTabs().addListener(
       ( final ListChangeListener.Change<? extends Tab> listener ) -> {
         while( listener.next() ) {
           if( listener.wasAdded() ) {
             final var tabs = listener.getAddedSubList();
             tabs.forEach( tab -> {
               final var node = tab.getContent();
               if( node instanceof TextEditor ) {
                 initScrollEventListener( tab );
+              }
             } );
             // Select and give focus to the last tab opened.
             final var index = tabs.size() - 1;
             if( index >= 0 ) {
               final var tab = tabs.get( index );
               tabPane.getSelectionModel().select( tab );
               tab.getContent().requestFocus();
+            }
+          }
+        }
+      }
     );
+  }
   /**
    * Synchronizes scrollbar positions between the given {@link Tab} that
    * contains an instance of {@link TextEditor} and {@link HtmlPreview} pane.
+   *
    * @param tab The container for an instance of {@link TextEditor}.
    */
   private void initScrollEventListener( final Tab tab ) {
     final var editor = (TextEditor) tab.getContent();
     final var scrollPane = editor.getScrollPane();
     final var scrollBar = mPreview.getVerticalScrollBar();
     final var handler = new ScrollEventHandler( scrollPane, scrollBar );
     handler.enabledProperty().bind( tab.selectedProperty() );
+  }
   private void addTabPane( final int index, final TabPane tabPane ) {
     final var items = getItems();
     if( !items.contains( tabPane ) ) {
       items.add( index, tabPane );
+    }
+  }
   private void addTabPane( final TabPane tabPane ) {
     addTabPane( getItems().size(), tabPane );
+  }
   private GenericBuilder<Mutator, ProcessorContext> processorContextBuilder() {
     final var w = getWorkspace();
     return builder()
       .with( Mutator::setDefinitions, this::getDefinitions )
       .with( Mutator::setLocale, w::getLocale )
       .with( Mutator::setMetadata, w::getMetadata )
       .with( Mutator::setThemesPath, w::getThemesPath )
       .with( Mutator::setCachesPath,
              () -> w.getFile( KEY_CACHES_DIR ) )
       .with( Mutator::setImagesPath,
              () -> w.getFile( KEY_IMAGES_DIR ) )
       .with( Mutator::setImageOrder,
              () -> w.getString( KEY_IMAGES_ORDER ) )
       .with( Mutator::setImageServer,
              () -> w.getString( KEY_IMAGES_SERVER ) )
       .with( Mutator::setFontsPath,
              () -> w.getFile( KEY_TYPESET_CONTEXT_FONTS_DIR ) )
       .with( Mutator::setCaret,
              () -> getTextEditor().getCaret() )
       .with( Mutator::setSigilBegan,
              () -> w.getString( KEY_DEF_DELIM_BEGAN ) )
       .with( Mutator::setSigilEnded,
              () -> w.getString( KEY_DEF_DELIM_ENDED ) )
       .with( Mutator::setRScript,
              () -> w.getString( KEY_R_SCRIPT ) )
       .with( Mutator::setRWorkingDir,
              () -> w.getFile( KEY_R_DIR ).toPath() )
       .with( Mutator::setCurlQuotes,
              () -> w.getBoolean( KEY_TYPESET_TYPOGRAPHY_QUOTES ) )
       .with( Mutator::setAutoRemove,
              () -> w.getBoolean( KEY_TYPESET_CONTEXT_CLEAN ) );
+  }
   public ProcessorContext createProcessorContext() {
     return createProcessorContext( null, NONE );
+  }
   /**
    * @param targetPath Used when exporting to a PDF file (binary).
    * @param format     Used when processors export to a new text format.
    * @return A new {@link ProcessorContext} to use when creating an instance of
    * {@link Processor}.
    */
   public ProcessorContext createProcessorContext(
     final Path targetPath, final ExportFormat format ) {
     final var textEditor = getTextEditor();
     final var sourcePath = textEditor.getPath();
     return processorContextBuilder()
       .with( Mutator::setSourcePath, sourcePath )
       .with( Mutator::setTargetPath, targetPath )
       .with( Mutator::setExportFormat, format )
       .build();
+  }
   /**
    * @param sourcePath Used by {@link ProcessorFactory} to determine
    *                   {@link Processor} type to create based on file type.
    * @return A new {@link ProcessorContext} to use when creating an instance of
    * {@link Processor}.
    */
   private ProcessorContext createProcessorContext( final Path sourcePath ) {
     return processorContextBuilder()
       .with( Mutator::setSourcePath, sourcePath )
       .with( Mutator::setExportFormat, NONE )
       .build();
+  }
   private TextResource createTextResource( final File file ) {
     // TODO: Create PlainTextEditor that's returned by default.
     return MediaType.valueFrom( file ) == TEXT_YAML
       ? createDefinitionEditor( file )
       : createMarkdownEditor( file );
+  }
   /**
    * Creates an instance of {@link MarkdownEditor} that listens for both
    * caret change events and text change events. Text change events must
    * take priority over caret change events because it's possible to change
    * the text without moving the caret (e.g., delete selected text).
+   *
    * @param inputFile The file containing contents for the text editor.
    * @return A non-null text editor.
    */
   private MarkdownEditor createMarkdownEditor( final File inputFile ) {
     final var editor = new MarkdownEditor( inputFile, getWorkspace() );
     updateProcessors( editor );
     // Listener for editor modifications or caret position changes.
     editor.addDirtyListener( ( c, o, n ) -> {
       if( n ) {
         // Reset the status bar after changing the text.
         clue();
         // Processing the text may update the status bar.
         process( getTextEditor() );
         // Update the caret position in the status bar.
         CaretMovedEvent.fire( editor.getCaret() );
+      }
     } );
     editor.addEventListener(
       keyPressed( SPACE, CONTROL_DOWN ), this::autoinsert
     );
     editor.addEventListener(
       keyPressed( ENTER, ALT_DOWN ), event -> mEditorSpeller.autofix( editor )
     );
     final var textArea = editor.getTextArea();
     // Spell check when the paragraph changes.
     textArea
       .plainTextChanges()
       .filter( p -> !p.isIdentity() )
       .subscribe( change -> mEditorSpeller.checkParagraph( textArea, change ) );
     // Store the caret position to restore it after restarting the application.
     textArea.caretPositionProperty().addListener(
       ( c, o, n ) ->
         getWorkspace().integerProperty( KEY_UI_RECENT_OFFSET ).setValue( n )
     );
     // Set the active editor, which refreshes the preview panel.
     mTextEditor.set( editor );
     // Check the entire document after the spellchecker is initialized (with
     // a valid lexicon) so that only the current paragraph need be scanned
     // while editing. (Technically, only the most recently modified word must
     // be scanned.)
     mSpellChecker.addListener(
       ( c, o, n ) -> runLater(
         () -> iterateEditors( mEditorSpeller::checkDocument )
+      )
     );
     // Check the entire document after it has been loaded.
     mEditorSpeller.checkDocument( mTextEditor.get() );
     return editor;
+  }
   /**
    * Creates a processor for an editor, provided one doesn't already exist.
+   *
    * @param editor The editor that potentially requires an associated processor.
    */
   private void updateProcessors( final TextEditor editor ) {
     final var path = editor.getFile().toPath();
     mProcessors.computeIfAbsent(
       editor, p -> createProcessors(
         createProcessorContext( path ),
         createHtmlPreviewProcessor()
+      )
     );
+  }
   /**
    * Removes a processor for an editor. This is required because a file may
    * change type while editing (e.g., from plain Markdown to R Markdown).
    * In the case that an editor's type changes, its associated processor must
    * be changed accordingly.
+   *
    * @param editor The editor that potentially requires an associated processor.
    */
   private void removeProcessor( final TextEditor editor ) {
     mProcessors.remove( editor );
+  }
   /**
    * Creates a {@link Processor} capable of rendering an HTML document onto
    * a GUI widget.
+   *
    * @return The {@link Processor} for rendering an HTML document.
    */
   private Processor<String> createHtmlPreviewProcessor() {
     return new HtmlPreviewProcessor( getPreview() );
+  }
   /**
    * Creates a spellchecker that accepts all words as correct. This allows
    * the spellchecker property to be initialized to a known valid value.
+   *
    * @return A wrapped {@link PermissiveSpeller}.
    */
   private ObjectProperty<SpellChecker> createSpellChecker() {
     return new SimpleObjectProperty<>( new PermissiveSpeller() );
+  }
   private TextEditorSpellChecker createTextEditorSpellChecker(
     final ObjectProperty<SpellChecker> spellChecker ) {
     return new TextEditorSpellChecker( spellChecker );
+  }
   /**
    * Delegates to {@link #autoinsert()}.
+   *
    * @param keyEvent Ignored.
    */
   private void autoinsert( final KeyEvent keyEvent ) {
     autoinsert();
+  }
   /**
    * Finds a node that matches the word at the caret, then inserts the
    * corresponding definition. The definition token delimiters depend on
    * the type of file being edited.
    */
   public void autoinsert() {
     mVariableNameInjector.autoinsert( getTextEditor(), getTextDefinition() );
+  }
   private TextDefinition createDefinitionEditor() {
     return createDefinitionEditor( DEFINITION_DEFAULT );
+  }
   private TextDefinition createDefinitionEditor( final File file ) {
     final var editor = new DefinitionEditor( file, createTreeTransformer() );
     editor.addTreeChangeHandler( mTreeHandler );
     return editor;
+  }
   private TreeTransformer createTreeTransformer() {
     return new YamlTreeTransformer();
+  }
   private Tooltip createTooltip( final File file ) {
     final var path = file.toPath();
     final var tooltip = new Tooltip( path.toString() );
     tooltip.setShowDelay( millis( 200 ) );
     return tooltip;
+  }
   public HtmlPreview getPreview() {
     return mPreview;
+  }
   /**
    * Returns the active text editor.
+   *
    * @return The text editor that currently has focus.
    */
   public TextEditor getTextEditor() {
     return mTextEditor.get();
+  }
   /**
    * Returns the active text editor property.
+   *
    * @return The property container for the active text editor.
    */
   public ReadOnlyObjectProperty<TextEditor> textEditorProperty() {
     return mTextEditor;
+  }
   /**
    * Returns the active text definition editor.
+   *
    * @return The property container for the active definition editor.
    */
   public TextDefinition getTextDefinition() {
     return mDefinitionEditor.get();
+  }
   /**
    * Returns the active variable definitions, without any interpolation.
    * Interpolation is a responsibility of {@link Processor} instances.
+   *
    * @return The key-value pairs, not interpolated.
    */
   private Map<String, String> getDefinitions() {
     return getTextDefinition().getDefinitions();
+  }
   public Window getWindow() {
     return getScene().getWindow();
+  }
   public Workspace getWorkspace() {
     return mWorkspace;
+  }
   /**
    * Returns the set of file names opened in the application. The names must
    * be converted to {@link File} objects.
+   *
    * @return A {@link Set} of file names.
    */
   private <E> SetProperty<E> getRecentFiles() {
     return getWorkspace().setsProperty( KEY_UI_RECENT_OPEN_PATH );
+  }
+}

A src/main/java/com/keenwrite/MainScene.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import com.keenwrite.io.FileModifiedListener;
 import com.keenwrite.io.FileWatchService;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.ui.actions.GuiCommands;
 import com.keenwrite.ui.listeners.CaretStatus;
 import javafx.scene.Node;
 import javafx.scene.Parent;
 import javafx.scene.Scene;
 import javafx.scene.control.MenuBar;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.VBox;
 import org.controlsfx.control.StatusBar;
 import java.io.File;
 import java.text.MessageFormat;
 import static com.keenwrite.constants.Constants.*;
 import static com.keenwrite.events.ScrollLockEvent.fireScrollLockEvent;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preferences.AppKeys.KEY_UI_SKIN_CUSTOM;
 import static com.keenwrite.preferences.AppKeys.KEY_UI_SKIN_SELECTION;
 import static com.keenwrite.preferences.SkinProperty.toFilename;
 import static com.keenwrite.ui.actions.ApplicationBars.*;
 import static javafx.application.Platform.runLater;
 import static javafx.scene.input.KeyCode.*;
 import static javafx.scene.input.KeyEvent.KEY_PRESSED;
 import static javafx.scene.input.KeyEvent.KEY_RELEASED;
 /**
  * Responsible for creating the bar scene: menu bar, toolbar, and status bar.
  */
 public final class MainScene {
   private final Scene mScene;
   private final MenuBar mMenuBar;
   private final Node mToolBar;
   private final StatusBar mStatusBar;
   private final FileWatchService mFileWatchService = new FileWatchService();
   private FileModifiedListener mStylesheetFileListener = event -> {};
   public MainScene( final Workspace workspace ) {
     final var mainPane = createMainPane( workspace );
     final var actions = createApplicationActions( mainPane );
     final var caretStatus = createCaretStatus();
     mMenuBar = setManagedLayout( createMenuBar( actions ) );
     mToolBar = setManagedLayout( createToolBar() );
     mStatusBar = setManagedLayout( createStatusBar() );
     mStatusBar.getRightItems().add( caretStatus );
     final var appPane = new BorderPane();
     appPane.setTop( new VBox( mMenuBar, mToolBar ) );
     appPane.setCenter( mainPane );
     appPane.setBottom( mStatusBar );
     final var fileWatcher = new Thread( mFileWatchService );
     fileWatcher.setDaemon( true );
     fileWatcher.start();
     mScene = createScene( appPane );
     initStylesheets( mScene, workspace );
+  }
   /**
    * Called by the {@link MainApp} to get a handle on the {@link Scene}
    * created by an instance of {@link MainScene}.
+   *
    * @return The {@link Scene} created at construction time.
    */
   public Scene getScene() {
     return mScene;
+  }
   public void toggleMenuBar() {
     final var node = mMenuBar;
     node.setVisible( !node.isVisible() );
+  }
   public void toggleToolBar() {
     final var node = mToolBar;
     node.setVisible( !node.isVisible() );
+  }
   public void toggleStatusBar() {
     final var node = mStatusBar;
     node.setVisible( !node.isVisible() );
+  }
   MenuBar getMenuBar() {
     return mMenuBar;
+  }
   public StatusBar getStatusBar() {return mStatusBar;}
   private void initStylesheets( final Scene scene, final Workspace workspace ) {
     final var internal = workspace.skinProperty( KEY_UI_SKIN_SELECTION );
     final var external = workspace.fileProperty( KEY_UI_SKIN_CUSTOM );
     final var inSkin = internal.get();
     final var exSkin = external.get();
     applyStylesheets( scene, inSkin, exSkin );
     internal.addListener(
       ( c, o, n ) -> {
         if( n != null ) {
           applyStylesheets( scene, n, exSkin );
+        }
+      }
     );
     external.addListener(
       ( c, o, n ) -> {
         if( o != null ) {
           mFileWatchService.unregister( o );
+        }
         if( n != null ) {
           try {
             applyStylesheets( scene, inSkin, n );
           } catch( final Exception ex ) {
             // Changes to the CSS file won't autoload, which is okay.
             clue( ex );
+          }
+        }
+      }
     );
     mFileWatchService.removeListener( mStylesheetFileListener );
     mStylesheetFileListener = event ->
       runLater( () -> applyStylesheets( scene, inSkin, event.getFile() ) );
     mFileWatchService.addListener( mStylesheetFileListener );
+  }
   private String getStylesheet( final String filename ) {
     return MessageFormat.format( STYLESHEET_APPLICATION_SKIN, filename );
+  }
   /**
    * Clears then re-applies all the internal stylesheets.
+   *
    * @param scene    The scene to stylize.
    * @param internal The CSS file name bundled with the application.
    * @param external The (optional) customized CSS file specified by the user.
    */
   private void applyStylesheets(
     final Scene scene, final String internal, final File external ) {
     final var stylesheets = scene.getStylesheets();
     stylesheets.clear();
     stylesheets.add( STYLESHEET_APPLICATION_BASE );
     stylesheets.add( STYLESHEET_MARKDOWN );
     stylesheets.add( getStylesheet( toFilename( internal ) ) );
     try {
       if( external != null && external.canRead() && !external.isDirectory() ) {
         stylesheets.add( external.toURI().toURL().toString() );
         mFileWatchService.register( external );
+      }
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   private MainPane createMainPane( final Workspace workspace ) {
     return new MainPane( workspace );
+  }
   private GuiCommands createApplicationActions( final MainPane mainPane ) {
     return new GuiCommands( this, mainPane );
+  }
   /**
    * Creates the class responsible for updating the UI with the caret position
    * based on the active text editor.
+   *
    * @return The {@link CaretStatus} responsible for updating the
    * {@link StatusBar} whenever the caret changes position.
    */
   private CaretStatus createCaretStatus() {
     return new CaretStatus();
+  }
   /**
    * Creates a new scene that is attached to the given {@link Parent}.
+   *
    * @param parent The container for the scene.
    * @return A scene to capture user interactions, UI styles, etc.
    */
   private Scene createScene( final Parent parent ) {
     final var scene = new Scene( parent );
     // After the app loses focus, when the user switches back using Alt+Tab,
     // the menu is sometimes engaged. See MainApp::initStage().
     //
     // JavaFX Bug: https://bugs.openjdk.java.net/browse/JDK-8090647
     scene.addEventHandler( KEY_PRESSED, event -> {
       // Only consume lone ALT key press events. If the modifier is used in
       // combination with another key, don't consume the event. First check
       // if ALT is down before getting the key code as a micro-optimization.
       if( event.isAltDown() ) {
         if( event.getCode() == ALT || event.getCode() == ALT_GRAPH ) {
           event.consume();
+        }
+      }
     } );
     // Update the synchronized scrolling status when user presses scroll lock.
     scene.addEventHandler( KEY_RELEASED, event -> {
       if( event.getCode() == SCROLL_LOCK ) {
         fireScrollLockEvent();
+      }
     } );
     return scene;
+  }
   /**
    * Binds the visible property of the node to the managed property so that
    * hiding the node also removes the screen real estate that it occupies.
    * This allows the user to hide the menu bar, toolbar, etc.
+   *
    * @param node The node to have its real estate bound to visibility.
    * @return The given node for fluent-like convenience.
    */
   private <T extends Node> T setManagedLayout( final T node ) {
     node.managedProperty().bind( node.visibleProperty() );
     return node;
+  }
+}

A src/main/java/com/keenwrite/Messages.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import com.keenwrite.collections.InterpolatingMap;
 import com.keenwrite.preferences.Key;
 import com.keenwrite.sigils.PropertyKeyOperator;
 import com.keenwrite.sigils.SigilKeyOperator;
 import java.net.URI;
 import java.text.MessageFormat;
 import java.util.ResourceBundle;
 import static com.keenwrite.constants.Constants.APP_BUNDLE_NAME;
 import static java.util.ResourceBundle.getBundle;
 /**
  * Recursively resolves message properties. Property values can refer to other
  * properties using a <code>${var}</code> syntax.
  */
 public final class Messages {
   private static final SigilKeyOperator OPERATOR = new PropertyKeyOperator();
   private static final InterpolatingMap MAP = new InterpolatingMap( OPERATOR );
   static {
     // Obtains the application resource bundle using the default locale. The
     // locale cannot be changed using the application, making interpolation of
     // values viable as a one-time operation.
     try {
       final var bundle = getBundle( APP_BUNDLE_NAME );
       bundle.keySet().forEach( key -> MAP.put( key, bundle.getString( key ) ) );
       MAP.interpolate();
     } catch( final Exception ignored ) {
       // This is bad, but it'll be extremely apparent when the UI loads. We
       // can't log this through regular channels because that'd lead to a
       // circular dependency.
+    }
+  }
   /**
    * Returns the value for a key from the message bundle. If the value cannot
    * be found, this returns the key.
+   *
    * @param key Retrieve the value for this key.
    * @return The value for the key, or the key itself if not found.
    */
   public static String get( final String key ) {
     final var v = MAP.get( key );
     return v == null ? key : v;
+  }
   /**
    * Returns the value for a key from the message bundle.
+   *
    * @param key Retrieve the value for this key.
    * @return The value for the key.
    */
   public static String get( final Key key ) {
     return get( key.toString() );
+  }
   /**
    * Returns the value for a key from the message bundle with the arguments
    * replacing <code>{#}</code> placeholders.
+   *
    * @param key  Retrieve the value for this key.
    * @param args The values to substitute for placeholders.
    * @return The value for the key.
    */
   public static String get( final String key, final Object... args ) {
     return MessageFormat.format( get( key ), args );
+  }
   public static int getInt( final String key, final int defaultValue ) {
     try {
       return Integer.parseInt( get( key ) );
     } catch( final NumberFormatException ignored ) {
       return defaultValue;
+    }
+  }
   public static URI getUri( final String key ) {
     return URI.create( get( key ) );
+  }
   /**
    * Answers whether the given key is contained in the application's messages
    * properties file.
+   *
    * @param key The key to look for in the {@link ResourceBundle}.
    * @return {@code true} when the key exists as an exact match.
    */
   public static boolean containsKey( final String key ) {
     return MAP.containsKey( key );
+  }
   private Messages() { }
+}

A src/main/java/com/keenwrite/Services.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.ServiceLoader;
 /**
  * Responsible for loading services. The services are treated as singleton
  * instances.
  */
 public class Services {
   @SuppressWarnings("rawtypes")
   private static final Map<Class, Object> SINGLETONS = new HashMap<>();
   /**
    * Loads a service based on its interface definition. This will return an
    * existing instance if the class has already been instantiated.
+   *
    * @param <T> The service to load.
    * @param api The interface definition for the service.
    * @return A class that implements the interface.
    */
   @SuppressWarnings("unchecked")
   public static <T> T load( final Class<T> api ) {
     final T o = (T) get( api );
     return o == null ? newInstance( api ) : o;
+  }
   private static <T> T newInstance( final Class<T> api ) {
     final ServiceLoader<T> services = ServiceLoader.load( api );
     for( final T service : services ) {
       if( service != null ) {
         // Re-use the same instance the next time the class is loaded.
         put( api, service );
         return service;
+      }
+    }
     throw new RuntimeException( "No implementation for: " + api );
+  }
   @SuppressWarnings("rawtypes")
   private static void put( final Class key, Object value ) {
     SINGLETONS.put( key, value );
+  }
   @SuppressWarnings("rawtypes")
   private static Object get( final Class api ) {
     return SINGLETONS.get( api );
+  }
+}

A src/main/java/com/keenwrite/cmdline/Arguments.java

 package com.keenwrite.cmdline;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
 import com.keenwrite.ExportFormat;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.ProcessorContext.Mutator;
 import picocli.CommandLine;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.concurrent.Callable;
 import java.util.function.Consumer;
 import static com.keenwrite.constants.Constants.DIAGRAM_SERVER_NAME;
 /**
  * Responsible for mapping command-line arguments to keys that are used by
  * the application.
  */
 @CommandLine.Command(
   name = "KeenWrite",
   mixinStandardHelpOptions = true,
   description = "Plain text editor for editing with variables"
+)
 @SuppressWarnings( "unused" )
 public final class Arguments implements Callable<Integer> {
   @CommandLine.Option(
     names = {"--all"},
     description =
       "Concatenate files before processing (${DEFAULT-VALUE})",
     defaultValue = "false"
+  )
   private boolean mConcatenate;
   @CommandLine.Option(
     names = {"--keep-files"},
     description =
       "Retain temporary build files (${DEFAULT-VALUE})",
     defaultValue = "false"
+  )
   private boolean mKeepFiles;
   @CommandLine.Option(
     names = {"--curl-quotes"},
     description =
       "Replace straight quotes with curly quotes (${DEFAULT-VALUE})",
     defaultValue = "true"
+  )
   private Boolean mCurlQuotes;
   @CommandLine.Option(
     names = {"-d", "--debug"},
     description =
       "Enable logging to the console (${DEFAULT-VALUE})",
     paramLabel = "Boolean",
     defaultValue = "false"
+  )
   private boolean mDebug;
   @CommandLine.Option(
     names = {"-i", "--input"},
     description =
       "Source document file path",
     paramLabel = "PATH",
     defaultValue = "stdin",
     required = true
+  )
   private Path mSourcePath;
   @CommandLine.Option(
     names = {"--font-dir"},
     description =
       "Directory to specify additional fonts",
     paramLabel = "String"
+  )
   private File mFontDir;
   @CommandLine.Option(
     names = {"--format-subtype"},
     description =
       "Export TeX subtype for HTML formats: svg, delimited",
     paramLabel = "String",
     defaultValue = "svg"
+  )
   private String mFormatSubtype;
   @CommandLine.Option(
     names = {"--cache-dir"},
     description =
       "Directory to store remote resources",
     paramLabel = "DIR"
+  )
   private File mCachesDir;
   @CommandLine.Option(
     names = {"--image-dir"},
     description =
       "Directory containing images",
     paramLabel = "DIR"
+  )
   private File mImagesDir;
   @CommandLine.Option(
     names = {"--image-order"},
     description =
       "Comma-separated image order (${DEFAULT-VALUE})",
     paramLabel = "String",
     defaultValue = "svg,pdf,png,jpg,tiff"
+  )
   private String mImageOrder;
   @CommandLine.Option(
     names = {"--image-server"},
     description =
       "SVG diagram rendering service (${DEFAULT-VALUE})",
     paramLabel = "String",
     defaultValue = DIAGRAM_SERVER_NAME
+  )
   private String mImageServer;
   @CommandLine.Option(
     names = {"--locale"},
     description =
       "Set localization (${DEFAULT-VALUE})",
     paramLabel = "String",
     defaultValue = "en"
+  )
   private String mLocale;
   @CommandLine.Option(
     names = {"-m", "--metadata"},
     description =
       "Map metadata keys to values, variable names allowed",
     paramLabel = "key=value"
+  )
   private Map<String, String> mMetadata;
   @CommandLine.Option(
     names = {"-o", "--output"},
     description =
       "Destination document file path",
     paramLabel = "PATH",
     defaultValue = "stdout",
     required = true
+  )
   private Path mTargetPath;
   @CommandLine.Option(
     names = {"-q", "--quiet"},
     description =
       "Suppress all status messages (${DEFAULT-VALUE})",
     defaultValue = "false"
+  )
   private boolean mQuiet;
   @CommandLine.Option(
     names = {"--r-dir"},
     description =
       "R working directory",
     paramLabel = "DIR"
+  )
   private Path mRWorkingDir;
   @CommandLine.Option(
     names = {"--r-script"},
     description =
       "R bootstrap script file path",
     paramLabel = "PATH"
+  )
   private Path mRScriptPath;
   @CommandLine.Option(
     names = {"--sigil-opening"},
     description =
       "Starting sigil for variable names (${DEFAULT-VALUE})",
     paramLabel = "String",
     defaultValue = "{{"
+  )
   private String mSigilBegan;
   @CommandLine.Option(
     names = {"--sigil-closing"},
     description =
       "Ending sigil for variable names (${DEFAULT-VALUE})",
     paramLabel = "String",
     defaultValue = "}}"
+  )
   private String mSigilEnded;
   @CommandLine.Option(
     names = {"--theme-dir"},
     description =
       "Theme directory",
     paramLabel = "DIR"
+  )
   private Path mThemesDir;
   @CommandLine.Option(
     names = {"-v", "--variables"},
     description =
       "Variables file path",
     paramLabel = "PATH"
+  )
   private Path mPathVariables;
   private final Consumer<Arguments> mLauncher;
   public Arguments( final Consumer<Arguments> launcher ) {
     mLauncher = launcher;
+  }
   public ProcessorContext createProcessorContext()
     throws IOException {
     final var definitions = parse( mPathVariables );
     final var format = ExportFormat.valueFrom( mTargetPath, mFormatSubtype );
     final var locale = lookupLocale( mLocale );
     final var rScript = read( mRScriptPath );
     return ProcessorContext
       .builder()
       .with( Mutator::setSourcePath, mSourcePath )
       .with( Mutator::setTargetPath, mTargetPath )
       .with( Mutator::setThemesPath, () -> mThemesDir )
       .with( Mutator::setCachesPath, () -> mCachesDir )
       .with( Mutator::setImagesPath, () -> mImagesDir )
       .with( Mutator::setImageServer, () -> mImageServer )
       .with( Mutator::setImageOrder, () -> mImageOrder )
       .with( Mutator::setFontsPath, () -> mFontDir )
       .with( Mutator::setExportFormat, format )
       .with( Mutator::setDefinitions, () -> definitions )
       .with( Mutator::setMetadata, () -> mMetadata )
       .with( Mutator::setLocale, () -> locale )
       .with( Mutator::setConcatenate, mConcatenate )
       .with( Mutator::setSigilBegan, () -> mSigilBegan )
       .with( Mutator::setSigilEnded, () -> mSigilEnded )
       .with( Mutator::setRWorkingDir, () -> mRWorkingDir )
       .with( Mutator::setRScript, () -> rScript )
       .with( Mutator::setCurlQuotes, () -> mCurlQuotes )
       .with( Mutator::setAutoRemove, () -> !mKeepFiles )
       .build();
+  }
   public boolean quiet() {
     return mQuiet;
+  }
   public boolean debug() {
     return mDebug;
+  }
   /**
    * Launches the main application window. This is called when not running
    * in headless mode.
+   *
    * @return {@code 0}
    * @throws Exception The application encountered an unrecoverable error.
    */
   @Override
   public Integer call() throws Exception {
     mLauncher.accept( this );
     return 0;
+  }
   private static String read( final Path path ) throws IOException {
     return path == null ? "" : Files.readString( path );
+  }
   /**
    * Parses the given YAML document into a map of key-value pairs.
+   *
    * @param vars Variable definition file to read, may be {@code null} if no
    *             variables are specified.
    * @return A non-interpolated variable map, or an empty map.
    * @throws IOException Could not read the variable definition file
    */
   private static Map<String, String> parse( final Path vars )
     throws IOException {
     final var map = new HashMap<String, String>();
     if( vars != null ) {
       final var yaml = read( vars );
       final var factory = new YAMLFactory();
       final var json = new ObjectMapper( factory ).readTree( yaml );
       parse( json, "", map );
+    }
     return map;
+  }
   private static void parse(
     final JsonNode json, final String parent, final Map<String, String> map ) {
     assert json != null;
     assert parent != null;
     assert map != null;
     json.fields().forEachRemaining( node -> parse( node, parent, map ) );
+  }
   private static void parse(
     final Entry<String, JsonNode> node,
     final String parent,
     final Map<String, String> map ) {
     assert node != null;
     assert parent != null;
     assert map != null;
     final var jsonNode = node.getValue();
     final var keyName = parent + "." + node.getKey();
     if( jsonNode.isValueNode() ) {
       // Trim the leading period, which is always present.
       map.put( keyName.substring( 1 ), node.getValue().asText() );
+    }
     else if( jsonNode.isObject() ) {
       parse( jsonNode, keyName, map );
+    }
+  }
   private static Locale lookupLocale( final String locale ) {
     try {
       return Locale.forLanguageTag( locale );
     } catch( final Exception ex ) {
       return Locale.ENGLISH;
+    }
+  }
+}

A src/main/java/com/keenwrite/cmdline/ColourScheme.java

 package com.keenwrite.cmdline;
 import static picocli.CommandLine.Help.Ansi.Style.*;
 import static picocli.CommandLine.Help.ColorScheme;
 import static picocli.CommandLine.Help.ColorScheme.Builder;
 /**
  * Responsible for creating the command-line parser's colour scheme.
  */
 public class ColourScheme {
   /**
    * Creates a new color scheme for use with command-line parsing.
+   *
    * @return The new color scheme to apply to the parsesr.
    */
   public static ColorScheme create() {
     return new Builder()
       .commands( bold )
       .options( fg_blue, bold )
       .parameters( fg_blue )
       .optionParams( italic )
       .errors( fg_red, bold )
       .stackTraces( italic )
       .build();
+  }
+}

A src/main/java/com/keenwrite/cmdline/HeadlessApp.java

 package com.keenwrite.cmdline;
 import com.keenwrite.AppCommands;
 import com.keenwrite.events.StatusEvent;
 import org.greenrobot.eventbus.Subscribe;
 import static com.keenwrite.events.Bus.register;
 /**
  * Responsible for running the application in headless mode.
  */
 public class HeadlessApp {
   /**
    * Contains directives that control text file processing.
    */
   private final Arguments mArgs;
   /**
    * Creates a new command-line version of the application.
+   *
    * @param args The post-processed command-line arguments.
    */
   public HeadlessApp( final Arguments args ) {
     assert args != null;
     mArgs = args;
     register( this );
     AppCommands.run( mArgs );
+  }
   /**
    * When a status message is shown, write it to the console, if not in
    * quiet mode.
+   *
    * @param event The event published when the status changes.
    */
   @Subscribe
   public void handle( final StatusEvent event ) {
     if( !mArgs.quiet() ) {
       System.out.println( event );
+    }
+  }
   /**
    * Entry point for running the application in headless mode.
+   *
    * @param args The parsed command-line arguments.
    */
   public static void main( final Arguments args ) {
     new HeadlessApp( args );
+  }
+}

A src/main/java/com/keenwrite/collections/BoundedCache.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.collections;
 import java.util.LinkedHashMap;
 import java.util.Map;
 /**
  * A map that removes the oldest entry once its capacity (cache size) has
  * been reached.
+ *
  * @param <K> The type of key mapped to a value.
  * @param <V> The type of value mapped to a key.
  */
 public final class BoundedCache<K, V> extends LinkedHashMap<K, V> {
   private final int mCacheSize;
   /**
    * Constructs a new instance having a finite size.
+   *
    * @param cacheSize The maximum number of entries.
    */
   public BoundedCache( final int cacheSize ) {
     mCacheSize = cacheSize;
+  }
   @Override
   protected boolean removeEldestEntry( final Map.Entry<K, V> eldest ) {
     return size() > mCacheSize;
+  }
+}

A src/main/java/com/keenwrite/collections/CircularQueue.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.collections;
 import java.util.*;
 import static java.lang.Math.min;
 /**
  * Responsible for maintaining a circular queue where newly added items will
  * overwrite existing items.
  * <p>
  * <strong>Warning:</strong> This class is not thread-safe.
  * </p>
+ *
  * @param <E> The type of elements to store in this collection.
  */
 @SuppressWarnings( "unchecked" )
 public class CircularQueue<E>
   extends AbstractCollection<E> implements Queue<E> {
   /**
    * Simplifies the code by reusing an existing list implementation.
    * Initialized with {@code null} values at construction time.
    */
   private final Object[] mElements;
   /**
    * Maximum number of elements allowed in the collection before old elements
    * are overwritten. Set at construction time.
    */
   private final int mCapacity;
   /**
    * Insertion position when a new element is added. Starts at zero.
    */
   private int mProducer;
   /**
    * Retrieval position when the oldest element is removed. Starts at zero.
    */
   private int mConsumer;
   /**
    * The number of elements in the collection. This cannot delegate to the
    * {@link #mElements} list. Starts at zero.
    */
   private int mSize;
   /**
    * Creates a new circular queue that has a limited number of elements that
    * may be added before newly added elements will overwrite the oldest
    * elements that were added previously.
    * <p>
    * <strong>Warning:</strong> Client classes must take care not to exceed
    * memory limits imposed by the Java Virtual Machine.
+   *
    * @param capacity Maximum number elements allowed in the list, must be
    *                 greater than one.
    */
   public CircularQueue( final int capacity ) {
     assert capacity > 1;
     mCapacity = capacity;
     mElements = new Object[ capacity ];
+  }
   /**
    * Adds an element to the end of the collection. This overwrites the oldest
    * element in the collection when the queue is full. The number of elements,
    * reflected by the return value of {@link #size()} will not exceed the
    * capacity.
+   *
    * @param element The item to insert into the collection, must not be
    *                {@code null}.
    * @return {@code true} Non-{@code null} items are always added.
    * @throws NullPointerException if the given element is {@code null}.
    *                              The iterator requires a consecutive
    *                              non-{@code null} range (no gaps).
    */
   @Override
   public boolean add( final E element ) {
     if( element == null ) {
       throw new NullPointerException();
+    }
     mElements[ mProducer++ ] = element;
     mProducer %= mCapacity;
     mSize = min( mSize + 1, mCapacity );
     return true;
+  }
   /**
    * Delegates to {@link #add(E)}.
    */
   @Override
   public boolean offer( final E element ) {
     return add( element );
+  }
   /**
    * Removes the oldest element that was added to the collection.  The number
    * of elements reflected by the return value of {@link #size()} will not
    * drop below zero.
+   *
    * @return The oldest element.
    * @throws NoSuchElementException The collection is empty.
    */
   @Override
   public E remove() {
     if( isEmpty() ) {
       throw new NoSuchElementException();
+    }
     final E element = (E) mElements[ mConsumer ];
     mElements[ mConsumer++ ] = null;
     mConsumer %= mCapacity;
     mSize--;
     return element;
+  }
   /**
    * Delegates to {@link #remove()}, but does not throw an exception.
+   *
    * @return The oldest element.
    */
   @Override
   public E poll() {
     return isEmpty() ? null : remove();
+  }
   /**
    * Returns the oldest element that was added to the collection.
+   *
    * @return The oldest element.
    * @throws NoSuchElementException The collection is empty.
    */
   @Override
   public E element() {
     if( isEmpty() ) {
       throw new NoSuchElementException();
+    }
     return (E) mElements[ mConsumer ];
+  }
   /**
    * Delegates to {@link #element()}, but does not throw an exception.
+   *
    * @return The oldest element.
    */
   @Override
   public E peek() {
     return isEmpty() ? null : element();
+  }
   /**
    * Answers how many elements are currently in the collection.
+   *
    * @return The number of elements that have been added to but not removed
    * from the collection.
    */
   @Override
   public int size() {
     return mSize;
+  }
   /**
    * Returns a facility to visit each of the elements in the
    * {@link CircularQueue}. This will start iterating at the oldest element
    * and stop when there are no more elements.
    * <p>
    * The iterator is not thread-safe; concurrent modifications to the number
    * of elements in the {@link CircularQueue} will result in undefined
    * behaviour.
+   *
    * @return A new {@link Iterator} instance capable of visiting each element.
    */
   @Override
   public Iterator<E> iterator() {
     return new Iterator<>() {
       private int mIndex = mConsumer;
       private boolean mFirst = true;
       @Override
       public boolean hasNext() {
         return (mFirst || mIndex != mConsumer) && mElements[ mIndex ] != null;
+      }
       @Override
       public E next() {
         final var element = mElements[ mIndex++ ];
         mIndex %= mCapacity;
         mFirst = false;
         return (E) element;
+      }
     };
+  }
   @Override
   public String toString() {
     return Arrays.toString( mElements );
+  }
+}

A src/main/java/com/keenwrite/collections/InterpolatingMap.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.collections;
 import com.keenwrite.sigils.SigilKeyOperator;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 /**
  * Responsible for interpolating key-value pairs in a map. That is, this will
  * iterate over all key-value pairs and replace keys wrapped in sigils
  * with corresponding definition value from the same map.
  */
 public class InterpolatingMap extends ConcurrentHashMap<String, String> {
   private static final int GROUP_DELIMITED = 1;
   /**
    * Used to override the default initial capacity in {@link HashMap}.
    */
   private static final int INITIAL_CAPACITY = 1 << 8;
   private final SigilKeyOperator mOperator;
   /**
    * @param operator Contains the opening and closing sigils that mark
    *                 where variable names begin and end.
    */
   public InterpolatingMap( final SigilKeyOperator operator ) {
     super( INITIAL_CAPACITY );
     assert operator != null;
     mOperator = operator;
+  }
   /**
    * @param operator Contains the opening and closing sigils that mark
    *                 where variable names begin and end.
    * @param m        The initial {@link Map} to copy into this instance.
    */
   public InterpolatingMap(
     final SigilKeyOperator operator, final Map<String, String> m ) {
     this( operator );
     putAll( m );
+  }
   /**
    * Interpolates all values in the map that reference other values by way
    * of key names. Performs a non-greedy match of key names delimited by
    * definition tokens. This operation modifies the map directly.
+   *
    * @return {@code this}
    */
   public InterpolatingMap interpolate() {
     for( final var k : keySet() ) {
       replace( k, interpolate( get( k ) ) );
+    }
     return this;
+  }
   /**
    * Given a value with zero or more key references, this will resolve all
    * the values, recursively. If a key cannot be de-referenced, the value will
    * contain the key name, including the original sigils.
+   *
    * @param value    Value containing zero or more key references.
    * @return The given value with all embedded key references interpolated.
    */
   public String interpolate( String value ) {
     assert value != null;
     final var matcher = mOperator.match( value );
     while( matcher.find() ) {
       final var keyName = matcher.group( GROUP_DELIMITED );
       final var mapValue = get( keyName );
       if( mapValue != null ) {
         final var keyValue = interpolate( mapValue );
         value = value.replace( mOperator.apply( keyName ), keyValue );
+      }
+    }
     return value;
+  }
+}

A src/main/java/com/keenwrite/constants/Constants.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.constants;
 import com.keenwrite.Bootstrap;
 import com.keenwrite.Services;
 import com.keenwrite.service.Settings;
 import java.io.File;
 import java.nio.charset.Charset;
 import java.nio.file.Path;
 import java.util.Locale;
 import static com.keenwrite.Bootstrap.APP_TITLE_LOWERCASE;
 import static com.keenwrite.Bootstrap.USER_DATA_DIR;
 import static com.keenwrite.preferences.LocaleScripts.withScript;
 import static java.io.File.separator;
 import static java.lang.String.format;
 import static java.lang.System.getProperty;
 import static org.apache.commons.lang3.SystemUtils.*;
 /**
  * Defines application-wide default values.
  */
 public final class Constants {
   /**
    * Used by the default settings to load the {@link Settings} service. This
    * must come before any attempt is made to create a {@link Settings} object.
    * The reference to {@link Bootstrap#APP_TITLE_LOWERCASE} should cause the
    * JVM to load {@link Bootstrap} prior to proceeding. Loading that class
    * beforehand will read the bootstrap properties file to determine the
    * application name, which is then used to locate the settings properties.
    */
   public static final String PATH_PROPERTIES_SETTINGS =
     format( "/com/%s/settings.properties", APP_TITLE_LOWERCASE );
   /**
    * The {@link Settings} uses {@link #PATH_PROPERTIES_SETTINGS}.
    */
   public static final Settings sSettings = Services.load( Settings.class );
   public static final double WINDOW_X_DEFAULT = 0;
   public static final double WINDOW_Y_DEFAULT = 0;
   public static final double WINDOW_W_DEFAULT = 1200;
   public static final double WINDOW_H_DEFAULT = 800;
   public static final File DOCUMENT_DEFAULT = getFile( "document" );
   public static final int DOCUMENT_OFFSET = 0;
   public static final File DEFINITION_DEFAULT = getFile( "definition" );
   public static final File PDF_DEFAULT = getFile( "pdf" );
   public static final String APP_BUNDLE_NAME = get( "application.messages" );
   public static final String STYLESHEET_APPLICATION_BASE =
     get( "file.stylesheet.application.base" );
   public static final String STYLESHEET_APPLICATION_SKIN =
     get( "file.stylesheet.application.skin" );
   public static final String STYLESHEET_MARKDOWN =
     get( "file.stylesheet.markdown" );
   public static final String STYLESHEET_MARKDOWN_LOCALE =
     "file.stylesheet.markdown.locale";
   public static final String STYLESHEET_PREVIEW =
     get( "file.stylesheet.preview" );
   public static final String STYLESHEET_PREVIEW_LOCALE =
     "file.stylesheet.preview.locale";
   public static final File FILE_PREFERENCES = getPreferencesFile();
   /**
    * Refer to file name extension settings in the configuration file. Do not
    * terminate with a period.
    */
   public static final String GLOB_PREFIX_FILE = "file.ext";
   /**
    * Three parameters: line number, column number, and offset.
    */
   public static final String STATUS_BAR_LINE = "Main.status.line";
   public static final String STATUS_BAR_OK = "Main.status.state.default";
   /**
    * Used to show an error while parsing, usually syntactical.
    */
   public static final String STATUS_PARSE_ERROR = "Main.status.error.parse";
   public static final String STATUS_DEFINITION_BLANK =
     "Main.status.error.def.blank";
   public static final String STATUS_DEFINITION_EMPTY =
     "Main.status.error.def.empty";
   /**
    * One parameter: the word under the cursor that could not be found.
    */
   public static final String STATUS_DEFINITION_MISSING =
     "Main.status.error.def.missing";
   /**
    * Default image extension order to use when scanning.
    */
   public static final String PERSIST_IMAGES_DEFAULT =
     get( "file.ext.image.order" );
   /**
    * Default working directory to use for R startup script.
    */
   public static final File USER_DIRECTORY =
     new File( System.getProperty( "user.dir" ) );
   public static final String NEWLINE = System.lineSeparator();
   /**
    * Default path to use for an untitled (pathless) file.
    */
   public static final Path DEFAULT_DIRECTORY = USER_DIRECTORY.toPath();
   /**
    * Default character set to use when reading/writing files.
    */
   public static final Charset DEFAULT_CHARSET = Charset.defaultCharset();
   /**
    * Default starting delimiter for definition variables. This value must
    * not overlap math delimiters, so do not use $ tokens as the first
    * delimiter.
    */
   public static final String DEF_DELIM_BEGAN_DEFAULT = "{{";
   /**
    * Default ending delimiter for definition variables.
    */
   public static final String DEF_DELIM_ENDED_DEFAULT = "}}";
   /**
    * Default starting delimiter when inserting R variables.
    */
   public static final String R_DELIM_BEGAN_DEFAULT = "x( ";
   /**
    * Default ending delimiter when inserting R variables.
    */
   public static final String R_DELIM_ENDED_DEFAULT = " )";
   /**
    * Resource directory where different language lexicons are located.
    */
   public static final String LEXICONS_DIRECTORY = "lexicons";
   /**
    * Absolute location of true type font files within the Java archive file.
    */
   public static final String FONT_DIRECTORY = "/fonts";
   /**
    * Default text editor font name.
    */
   public static final String FONT_NAME_EDITOR_DEFAULT = "Noto Sans Regular";
   /**
    * Default text editor font size, in points.
    */
   public static final float FONT_SIZE_EDITOR_DEFAULT = 12f;
   /**
    * Default preview font name.
    */
   public static final String FONT_NAME_PREVIEW_DEFAULT = "Source Serif 4";
   /**
    * Default preview font size, in points.
    */
   public static final float FONT_SIZE_PREVIEW_DEFAULT = 13f;
   /**
    * Scaling factor for rendering mathematics.
    */
   public static final double FONT_SIZE_MATH_DEFAULT = 2;
   /**
    * Default monospace preview font name.
    */
   public static final String FONT_NAME_PREVIEW_MONO_NAME_DEFAULT =
     "Source Code Pro";
   /**
    * Default monospace preview font size, in points.
    */
   public static final float FONT_SIZE_PREVIEW_MONO_SIZE_DEFAULT = 13f;
   /**
    * Default locale for font loading, including ISO 15924 alpha-4 script code.
    */
   public static final Locale LOCALE_DEFAULT = withScript( Locale.getDefault() );
   /**
    * Default CSS to apply (resolves to a minimal implementation).
    */
   public static final String SKIN_DEFAULT = "Modena Light";
   /**
    * Custom JavaFX CSS to apply to user interface.
    */
   public static final File SKIN_CUSTOM_DEFAULT = null;
   /**
    * Custom HTML CSS to apply to HTML preview panel.
    */
   public static final File PREVIEW_CUSTOM_DEFAULT = null;
   /**
    * Default identifier to use for synchronized scrolling.
    */
   public static final String CARET_ID = "caret";
   /**
    * Default spacing for UI items (e.g., toolbars).
    */
   public static final int UI_CONTROL_SPACING = 10;
   /**
    * Default server name for rendering diagrams.
    */
   public static final String DIAGRAM_SERVER_NAME = "kroki.io";
   /**
    * Application action messages properties prefix.
    */
   public static final String ACTION_PREFIX = "Action.";
   /**
    * Restrict theme names when displaying.
    */
   public static final byte THEME_NAME_LENGTH = 30;
   /**
    * Prevent instantiation.
    */
   private Constants() {
+  }
   /**
    * Converts from points to pixels because FlyingSaucer cannot handle points
    * properly. This is used to convert font sizes.
+   *
    * @param points The points to convert to pixels.
    * @return The given number of points in equivalent pixels.
    */
   public static int toPixels( final double points ) {
     return (int) (points * (1 + 1 / 3f));
+  }
   static String get( final String key ) {
     return sSettings.getSetting( key, "" );
+  }
   /**
    * Returns a default {@link File} instance based on the given key suffix.
+   *
    * @param suffix Appended to {@code "file.default."}.
    * @return A new {@link File} instance that references the settings file name.
    */
   private static File getFile( final String suffix ) {
     return new File( get( "file.default." + suffix ) );
+  }
   /**
    * Returns the equivalent of {@code $HOME/.filename.xml}.
    */
   private static File getPreferencesFile() {
     return new File( format(
       "%s%s.%s.xml",
       getProperty( "user.home" ),
       separator,
       APP_TITLE_LOWERCASE
     ) );
+  }
   /**
    * Tries to get a system-independent path to the user's fonts directory.
    */
   public static File getFontDirectory() {
     final var FONT_PATH = Path.of( "fonts" );
     final var USER_HOME = System.getProperty( "user.home" );
     final String fontBase;
     final Path fontUser;
     if( IS_OS_WINDOWS ) {
       fontBase = System.getenv( "WINDIR" );
       fontUser = FONT_PATH;
+    }
     else if( IS_OS_MAC ) {
       fontBase = USER_HOME;
       fontUser = Path.of( "Library", "Fonts" );
+    }
     else if( IS_OS_UNIX ) {
       fontBase = USER_HOME;
       fontUser = Path.of( ".fonts" );
+    }
     else {
       fontBase = USER_DATA_DIR.toString();
       fontUser = FONT_PATH;
+    }
     return (fontBase == null
       ? USER_DATA_DIR.relativize( fontUser )
       : Path.of( fontBase ).resolve( fontUser )).toFile();
+  }
+}

A src/main/java/com/keenwrite/constants/GraphicsConstants.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.constants;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 import java.util.ArrayList;
 import java.util.List;
 import static com.keenwrite.constants.Constants.get;
 /**
  * Defines application-wide default values for GUI-related items. This helps
  * ensure that unit tests that have no graphical dependencies will pass.
  */
 public class GraphicsConstants {
   public static final List<Image> LOGOS = createImages(
     "file.logo.16",
     "file.logo.32",
     "file.logo.128",
     "file.logo.256",
     "file.logo.512"
   );
   public static final Image ICON_DIALOG = LOGOS.get( 1 );
   public static final ImageView ICON_DIALOG_NODE = new ImageView( ICON_DIALOG );
   /**
    * Converts the given file names to images, such as application icons.
+   *
    * @param keys The file names to convert to images.
    * @return The images loaded from the file name references.
    */
   private static List<Image> createImages( final String... keys ) {
     final List<Image> images = new ArrayList<>( keys.length );
     for( final var key : keys ) {
       images.add( new Image( get( key ) ) );
+    }
     return images;
+  }
+}

A src/main/java/com/keenwrite/dom/DocumentConverter.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.dom;
 import org.jetbrains.annotations.NotNull;
 import org.jsoup.Jsoup;
 import org.jsoup.helper.W3CDom;
 import org.jsoup.nodes.Document.OutputSettings.Syntax;
 import org.jsoup.nodes.Node;
 import org.jsoup.nodes.TextNode;
 import org.jsoup.select.NodeVisitor;
 import org.w3c.dom.Document;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import static com.keenwrite.dom.DocumentParser.sDomImplementation;
 import static com.keenwrite.processors.text.TextReplacementFactory.replace;
 import static java.util.Map.*;
 /**
  * Responsible for converting JSoup document object model (DOM) to a W3C DOM.
  * Provides a lighter implementation than the superclass by overriding the
  * {@link #fromJsoup(org.jsoup.nodes.Document)} method to reuse factories,
  * builders, and implementations.
  */
 public final class DocumentConverter extends W3CDom {
   /**
    * Retain insertion order using an instance of {@link LinkedHashMap} so
    * that ligature substitution uses longer ligatures ahead of shorter
    * ligatures. The word "ruffian" should use the "ffi" ligature, not the "ff"
    * ligature.
    */
   private static final Map<String, String> LIGATURES = ofEntries(
     entry( "ffi", "ﬃ" ),
     entry( "ffl", "ﬄ" ),
     entry( "ff", "ﬀ" ),
     entry( "fi", "ﬁ" ),
     entry( "fl", "ﬂ" )
   );
   private static final NodeVisitor LIGATURE_VISITOR = new NodeVisitor() {
     @Override
     public void head( final @NotNull Node node, final int depth ) {
       if( node instanceof final TextNode textNode ) {
         final var parent = node.parentNode();
         final var name = parent == null ? "root" : parent.nodeName();
         if( !("pre".equalsIgnoreCase( name ) ||
           "code".equalsIgnoreCase( name ) ||
           "kbd".equalsIgnoreCase( name ) ||
           "var".equalsIgnoreCase( name ) ||
           "tt".equalsIgnoreCase( name )) ) {
           // Calling getWholeText() will return newlines, which must be kept
           // to ensure that preformatted text maintains its formatting.
           textNode.text( replace( textNode.getWholeText(), LIGATURES ) );
+        }
+      }
+    }
     @Override
     public void tail( final @NotNull Node node, final int depth ) { }
   };
   @Override
   public @NotNull Document fromJsoup( final org.jsoup.nodes.Document in ) {
     assert in != null;
     final var out = DocumentParser.newDocument();
     final var doctype = in.documentType();
     if( doctype != null ) {
       out.appendChild(
         sDomImplementation.createDocumentType(
           doctype.name(),
           doctype.publicId(),
           doctype.systemId()
+        )
       );
+    }
     out.setXmlStandalone( true );
     in.traverse( LIGATURE_VISITOR );
     convert( in, out );
     return out;
+  }
   /**
    * Converts the given non-well-formed HTML document into an XML document
    * while preserving whitespace.
+   *
    * @param html The document to convert.
    * @return The converted document as an object model.
    */
   public static org.jsoup.nodes.Document parse( final String html ) {
     final var document = Jsoup.parse( html );
     document
       .outputSettings()
       .syntax( Syntax.xml )
       .prettyPrint( false );
     return document;
+  }
+}

A src/main/java/com/keenwrite/dom/DocumentParser.java

 package com.keenwrite.dom;
 import org.w3c.dom.*;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.transform.Transformer;
 import javax.xml.transform.TransformerException;
 import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 import javax.xml.xpath.XPath;
 import javax.xml.xpath.XPathExpression;
 import javax.xml.xpath.XPathExpressionException;
 import javax.xml.xpath.XPathFactory;
 import java.io.*;
 import java.nio.file.Path;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.Consumer;
 import static com.keenwrite.events.StatusEvent.clue;
 import static java.nio.charset.StandardCharsets.UTF_16;
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.nio.file.Files.write;
 import static javax.xml.transform.OutputKeys.*;
 import static javax.xml.xpath.XPathConstants.NODESET;
 /**
  * Responsible for initializing an XML parser.
  */
 public class DocumentParser {
   private static final String LOAD_EXTERNAL_DTD =
     "http://apache.org/xml/features/nonvalidating/load-external-dtd";
   private static final String INDENT_AMOUNT =
     "{http://xml.apache.org/xslt}indent-amount";
   private static final ByteArrayOutputStream sWriter =
     new ByteArrayOutputStream( 65536 );
   private static final OutputStreamWriter sOutput =
     new OutputStreamWriter( sWriter );
   /**
    * Caches {@link XPathExpression}s to avoid re-compiling.
    */
   private static final Map<String, XPathExpression> sXpaths = new HashMap<>();
   private static final DocumentBuilderFactory sDocumentFactory;
   private static DocumentBuilder sDocumentBuilder;
   private static Transformer sTransformer;
   private static final XPath sXpath = XPathFactory.newInstance().newXPath();
   public static DOMImplementation sDomImplementation;
   static {
     sDocumentFactory = DocumentBuilderFactory.newInstance();
     sDocumentFactory.setValidating( false );
     sDocumentFactory.setAttribute( LOAD_EXTERNAL_DTD, false );
     sDocumentFactory.setNamespaceAware( true );
     sDocumentFactory.setIgnoringComments( true );
     sDocumentFactory.setIgnoringElementContentWhitespace( true );
     try {
       sDocumentBuilder = sDocumentFactory.newDocumentBuilder();
       sDomImplementation = sDocumentBuilder.getDOMImplementation();
       sTransformer = TransformerFactory.newInstance().newTransformer();
       // Ensure Unicode characters (emojis) are encoded correctly.
       sTransformer.setOutputProperty( ENCODING, UTF_16.toString() );
       sTransformer.setOutputProperty( OMIT_XML_DECLARATION, "yes" );
       sTransformer.setOutputProperty( METHOD, "xml" );
       sTransformer.setOutputProperty( INDENT, "no" );
       sTransformer.setOutputProperty( INDENT_AMOUNT, "2" );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   public static Document newDocument() {
     return sDocumentBuilder.newDocument();
+  }
   /**
    * Creates a new document object model based on the given XML document
    * string. This will return an empty document if the document could not
    * be parsed.
+   *
    * @param xml The document text to convert into a DOM.
    * @return The DOM that represents the given XML data.
    */
   public static Document parse( final String xml ) {
     assert xml != null;
     final var input = new InputSource();
     try( final var reader = new StringReader( xml ) ) {
       input.setEncoding( UTF_8.toString() );
       input.setCharacterStream( reader );
       return sDocumentBuilder.parse( input );
     } catch( final Exception ex ) {
       clue( ex );
       return sDocumentBuilder.newDocument();
+    }
+  }
   /**
    * Parses the given file contents into a document object model.
+   *
    * @param doc The source XML document to parse.
    * @return The file as a document object model.
    * @throws IOException  Could not open the document.
    * @throws SAXException Could not read the XML file content.
    */
   public static Document parse( final File doc )
     throws IOException, SAXException {
     assert doc != null;
     try( final var in = new FileInputStream( doc ) ) {
       return parse( in );
+    }
+  }
   /**
    * Parses the given file contents into a document object model. Callers
    * must close the stream.
+   *
    * @param doc The source XML document to parse.
    * @return The {@link InputStream} converted to a document object model.
    * @throws IOException  Could not open the document.
    * @throws SAXException Could not read the XML file content.
    */
   public static Document parse( final InputStream doc )
     throws IOException, SAXException {
     assert doc != null;
     return sDocumentBuilder.parse( doc );
+  }
   /**
    * Allows an operation to be applied for every node in the document that
    * matches a given tag name pattern.
+   *
    * @param document Document to traverse.
    * @param xpath    Document elements to find via {@link XPath} expression.
    * @param consumer The consumer to call for each matching document node.
    */
   public static void visit(
     final Document document,
     final CharSequence xpath,
     final Consumer<Node> consumer ) {
     assert document != null;
     assert consumer != null;
     try {
       final var expr = compile( xpath );
       final var nodeSet = expr.evaluate( document, NODESET );
       if( nodeSet instanceof NodeList nodes ) {
         for( int i = 0, len = nodes.getLength(); i < len; i++ ) {
           consumer.accept( nodes.item( i ) );
+        }
+      }
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   public static Node createMeta(
     final Document document, final Map.Entry<String, String> entry ) {
     assert document != null;
     assert entry != null;
     final var node = document.createElement( "meta" );
     node.setAttribute( "name", entry.getKey() );
     node.setAttribute( "content", entry.getValue() );
     return node;
+  }
   public static Node createElement(
     final Document doc, final String nodeName, final String nodeValue ) {
     assert doc != null;
     assert nodeName != null;
     assert !nodeName.isBlank();
     final var node = doc.createElement( nodeName );
     if( nodeValue != null ) {
       node.setTextContent( nodeValue );
+    }
     return node;
+  }
   public static String toString( final Document xhtml ) {
     assert xhtml != null;
     try( final var writer = new StringWriter() ) {
       final var result = new StreamResult( writer );
       transform( xhtml, result );
       return writer.toString();
     } catch( final Exception ex ) {
       clue( ex );
       return "";
+    }
+  }
   public static String transform( final Element root )
     throws IOException, TransformerException {
     assert root != null;
     try( final var writer = new StringWriter() ) {
       transform( root.getOwnerDocument(), new StreamResult( writer ) );
       return writer.toString();
+    }
+  }
   /**
    * Remove whitespace, comments, and XML/DOCTYPE declarations to make
    * processing work with ConTeXt.
+   *
    * @param path The SVG file to process.
    * @throws Exception The file could not be processed.
    */
   public static void sanitize( final Path path ) throws Exception {
     assert path != null;
     // Preprocessing the SVG image is a single-threaded operation, no matter
     // how many SVG images are in the document to typeset.
     sWriter.reset();
     final var target = new StreamResult( sOutput );
     final var source = sDocumentBuilder.parse( path.toFile() );
     transform( source, target );
     write( path, sWriter.toByteArray() );
+  }
   /**
    * Converts a string into an {@link XPathExpression}, which may be used to
    * extract elements from a {@link Document} object model.
+   *
    * @param cs The string to convert to an {@link XPathExpression}.
    * @return {@code null} if there was an error compiling the xpath.
    */
   public static XPathExpression compile( final CharSequence cs ) {
     assert cs != null;
     final var xpath = cs.toString();
     return sXpaths.computeIfAbsent( xpath, k -> {
       try {
         return sXpath.compile( xpath );
       } catch( final XPathExpressionException ex ) {
         clue( ex );
         return null;
+      }
     } );
+  }
   /**
    * Streams an instance of {@link Document} as a plain text XML document.
+   *
    * @param src The source document to transform.
    * @param dst The destination location to write the transformed version.
    * @throws TransformerException Could not transform the document.
    */
   private static void transform( final Document src, final StreamResult dst )
     throws TransformerException {
     sTransformer.transform( new DOMSource( src ), dst );
+  }
   /**
    * Use the {@code static} constants and methods, not an instance, at least
    * until an iterable sub-interface is written.
    */
   private DocumentParser() { }
+}

A src/main/java/com/keenwrite/editors/TextDefinition.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors;
 import com.keenwrite.editors.definition.DefinitionEditor;
 import com.keenwrite.editors.definition.DefinitionTreeItem;
 import com.keenwrite.editors.markdown.MarkdownEditor;
 import javafx.scene.control.TreeItem;
 import java.util.Map;
 /**
  * Differentiates an instance of {@link TextResource} from an instance of
  * {@link DefinitionEditor} or {@link MarkdownEditor}.
  */
 public interface TextDefinition extends TextResource {
   /**
    * Requests all variable definitions.
+   *
    * @return The definition map without interpolation.
    */
   Map<String, String> getDefinitions();
   /**
    * Requests that the visual representation be expanded to the given node.
+   *
    * @param node Request expansion to this node.
    */
   <T> void expand( TreeItem<T> node );
   /**
    * Adds a new item to the definition hierarchy.
    */
   void createDefinition();
   /**
    * Edits the currently selected definition in the hierarchy.
    */
   void renameDefinition();
   /**
    * Removes the currently selected definition in the hierarchy.
    */
   void deleteDefinitions();
   /**
    * Finds the definition that exact matches the given text.
+   *
    * @param text The value to find, never {@code null}.
    * @return The leaf that contains the given value.
    */
   DefinitionTreeItem<String> findLeafExact( String text );
   /**
    * Finds the definition that starts with the given text.
+   *
    * @param text The value to find, never {@code null}.
    * @return The leaf that starts with the given value.
    */
   DefinitionTreeItem<String> findLeafStartsWith( String text );
   /**
    * Finds the definition that contains the given text, matching case.
+   *
    * @param text The value to find, never {@code null}.
    * @return The leaf that contains the exact given value.
    */
   DefinitionTreeItem<String> findLeafContains( String text );
   /**
    * Finds the definition that contains the given text, ignoring case.
+   *
    * @param text The value to find, never {@code null}.
    * @return The leaf that contains the given value, regardless of case.
    */
   DefinitionTreeItem<String> findLeafContainsNoCase( String text );
   /**
    * Answers whether there are any definitions written.
+   *
    * @return {@code true} when there are no definitions.
    */
   boolean isEmpty();
+}

A src/main/java/com/keenwrite/editors/TextEditor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors;
 import com.keenwrite.editors.common.Caret;
 import javafx.scene.control.IndexRange;
 import org.fxmisc.flowless.VirtualizedScrollPane;
 import org.fxmisc.richtext.StyleClassedTextArea;
 /**
  * Responsible for differentiating an instance of {@link TextResource} from
  * other {@link TextResource} subtypes, such as a {@link TextDefinition}.
  * This is primarily used as a marker interface, but also defines a minimal
  * set of functionality required by all {@link TextEditor} instances, which
  * includes scrolling facilities.
  */
 public interface TextEditor extends TextResource {
   /**
    * Returns the scrollbars associated with the editor's view so that they
    * can be moved for synchronized scrolling.
+   *
    * @return The initialized horizontal and vertical scrollbars.
    */
   VirtualizedScrollPane<StyleClassedTextArea> getScrollPane();
   StyleClassedTextArea getTextArea();
   /**
    * Delegates requesting focus to the internal {@link StyleClassedTextArea}.
    */
   default void requestFocus() {
     getTextArea().requestFocus();
+  }
   /**
    * Returns the complete text for the specified paragraph index.
+   *
    * @param paragraph The zero-based paragraph index.
    * @throws IndexOutOfBoundsException The paragraph index is less than zero
    *                                   or greater than the number of
    *                                   paragraphs in the document.
    */
   String getText( int paragraph ) throws IndexOutOfBoundsException;
   /**
    * Returns the text between the indexes specified by the given
    * {@link IndexRange}.
+   *
    * @param indexes The start and end document indexes to reference.
    * @return The text between the specified indexes.
    * @throws IndexOutOfBoundsException The indexes are invalid.
    */
   String getText( IndexRange indexes ) throws IndexOutOfBoundsException;
   /**
    * Moves the caret to the given document offset.
+   *
    * @param offset The absolute offset into the document, zero-based.
    */
   void moveTo( final int offset );
   /**
    * Returns an object that can be used to track the current caret position
    * within the document.
+   *
    * @return The caret's position, which is updated continuously.
    */
   Caret getCaret();
   /**
    * Replaces the text within the given range with the given string.
+   *
    * @param indexes The starting and ending document indexes that represent
    *                the range of text to replace.
    * @param s       The text to replace, which can be shorter or longer than the
    *                specified range.
    */
   void replaceText( IndexRange indexes, String s );
   /**
    * Returns the starting and ending indexes into the document for the
    * word at the current caret position.
    * <p>
    * Finds the start and end indexes for the word in the current document,
    * where the caret is located. There are a few different scenarios, where
    * the caret can be at: the start, end, or middle of a word; also, the
    * caret can be at the end or beginning of a punctuated word; as well, the
    * caret could be at the beginning or end of the line or document.
    * </p>
+   *
    * @return The start and ending index into the current document that
    * represent the word boundaries of the word under the caret.
    */
   IndexRange getCaretWord();
   /**
    * Convenience method to get the word at the current caret position.
+   *
    * @return This will return the empty string if the caret is out of bounds.
    */
   default String getCaretWordText() {
     return getText( getCaretWord() );
+  }
   /**
    * Requests undoing the last text-changing action.
    */
   void undo();
   /**
    * Requests redoing the last text-changing action that was undone.
    */
   void redo();
   /**
    * Requests cutting the selected text, or the current line if none selected.
    */
   void cut();
   /**
    * Requests copying the selected text, or no operation if none selected.
    */
   void copy();
   /**
    * Requests pasting from the clipboard into the editor. This will replace
    * text if selected, otherwise the clipboard contents are inserted at the
    * cursor.
    */
   void paste();
   /**
    * Requests selecting the entire document. This will replace the existing
    * selection, if any.
    */
   void selectAll();
   /**
    * Requests making the selected text, or word at caret, bold.
    */
   default void bold() {}
   /**
    * Requests making the selected text, or word at caret, italic.
    */
   default void italic() {}
   /**
    * Requests making the selected text, or word at caret, monospace.
    */
   default void monospace() {}
   /**
    * Requests making the selected text, or word at caret, a superscript.
    */
   default void superscript() {}
   /**
    * Requests making the selected text, or word at caret, a subscript.
    */
   default void subscript() {}
   /**
    * Requests making the selected text, or word at caret, struck.
    */
   default void strikethrough() {}
   /**
    * Requests making the selected text, or word at caret, a blockquote block.
    */
   default void blockquote() {}
   /**
    * Requests making the selected text, or word at caret, inline code.
    */
   default void code() {}
   /**
    * Requests making the selected text, or word at caret, a fenced code block.
    */
   default void fencedCodeBlock() {}
   /**
    * Requests making the selected text, or word at caret, a heading.
+   *
    * @param level The heading level to apply (typically 1 through 3).
    */
   default void heading( final int level ) {}
   /**
    * Requests making the selected text, or word at caret, an unordered list
    * block.
    */
   default void unorderedList() {}
   /**
    * Requests making the selected text, or word at caret, an ordered list block.
    */
   default void orderedList() {}
   /**
    * Requests making the selected text, or inserting at the caret, a
    * horizontal rule.
    */
   default void horizontalRule() {}
   /**
    * Requests that styling be added to the document between the given
    * integer values.
+   *
    * @param indexes Document offset where style is to start and end.
    * @param style   The style class to apply between the given offset indexes.
    */
   default void stylize( final IndexRange indexes, final String style ) {}
   /**
    * Requests that the most recent styling for the given style class be
    * removed from the document between the given integer values.
    */
   default void unstylize( final String style ) {}
+}

A src/main/java/com/keenwrite/editors/TextResource.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors;
 import com.keenwrite.io.MediaType;
 import javafx.beans.property.ReadOnlyBooleanProperty;
 import javafx.scene.Node;
 import org.mozilla.universalchardet.UniversalDetector;
 import java.io.File;
 import java.nio.charset.Charset;
 import java.nio.file.Path;
 import static com.keenwrite.constants.Constants.DEFAULT_CHARSET;
 import static com.keenwrite.events.StatusEvent.clue;
 import static java.nio.charset.Charset.forName;
 import static java.nio.file.Files.readAllBytes;
 import static java.nio.file.Files.write;
 import static java.util.Arrays.asList;
 import static java.util.Locale.ENGLISH;
 /**
  * A text resource can be persisted and retrieved from its persisted location.
  */
 public interface TextResource {
   /**
    * Sets the text string that to be changed through some graphical user
    * interface. For example, a YAML document must be parsed from the given
    * text string into a tree view with which the user may interact.
+   *
    * @param text The new content for the resource.
    */
   void setText( String text );
   /**
    * Returns the text string that may have been modified by the user through
    * some graphical user interface.
+   *
    * @return The text value, based on the value set from
    * {@link #setText(String)}, but possibly mutated.
    */
   String getText();
   /**
    * Return the character encoding for this file.
+   *
    * @return A non-null character set, primarily detected from file contents.
    */
   Charset getEncoding();
   /**
    * Renames the current file to the given fully qualified file name.
+   *
    * @param file The new file name.
    */
   void rename( final File file );
   /**
    * Returns the file name, without any directory components, for this instance.
    * Useful for showing as a tab title.
+   *
    * @return The file name value returned from {@link #getFile()}.
    */
   default String getFilename() {
     final var filename = getFile().toPath().getFileName();
     return filename == null ? "" : filename.toString();
+  }
   /**
    * Returns the fully qualified {@link File} to the editable text resource.
    * Useful for showing as a tab tooltip, saving the file, or reading it.
+   *
    * @return A non-null {@link File} instance.
    */
   File getFile();
   /**
    * Returns the {@link MediaType} associated with the file being edited.
+   *
    * @return The {@link MediaType} for the editor's file.
    */
   default MediaType getMediaType() {
     return MediaType.valueFrom( getFile() );
+  }
   /**
    * Answers whether this instance is an editor for at least one of the given
    * {@link MediaType} references.
+   *
    * @param mediaTypes The {@link MediaType} references to compare against.
    * @return {@code true} if the given list of media types contains the
    * {@link MediaType} for this editor.
    */
   default boolean isMediaType( final MediaType... mediaTypes ) {
     return asList( mediaTypes ).contains( getMediaType() );
+  }
   /**
    * Returns the fully qualified {@link Path} to the editable text resource.
    * This delegates to {@link #getFile()}.
+   *
    * @return A non-null {@link Path} instance.
    */
   default Path getPath() {
     return getFile().toPath();
+  }
   /**
    * Read the file contents and update the text accordingly. If the file
    * cannot be read then no changes will happen to the text. Fails silently.
+   *
    * @param path The fully qualified {@link Path}, including a file name, to
    *             fully read into the editor.
    * @return The character encoding for the file at the given {@link Path}.
    */
   default Charset open( final Path path ) {
     final var file = path.toFile();
     Charset encoding = DEFAULT_CHARSET;
     try {
       if( file.exists() ) {
         if( file.canWrite() && file.canRead() ) {
           final var bytes = readAllBytes( path );
           encoding = detectEncoding( bytes );
           setText( asString( bytes, encoding ) );
+        }
         else {
           clue( "TextResource.load.error.permissions", file.toString() );
+        }
+      }
       else {
         clue( "TextResource.load.error.unsaved", file.toString() );
+      }
     } catch( final Exception ex ) {
       clue( ex );
+    }
     return encoding;
+  }
   /**
    * Read the file contents and update the text accordingly. If the file
    * cannot be read then no changes will happen to the text. This delegates
    * to {@link #open(Path)}.
+   *
    * @param file The {@link File} to fully read into the editor.
    * @return The file's character encoding.
    */
   default Charset open( final File file ) {
     return open( file.toPath() );
+  }
   /**
    * Save the file contents and clear the modified flag. If the file cannot
    * be saved, the exception is swallowed and this method returns {@code false}.
+   *
    * @return {@code true} the file was saved; {@code false} if upon exception.
    */
   default boolean save() {
     try {
       write( getPath(), asBytes( getText() ) );
       clearModifiedProperty();
       return true;
     } catch( final Exception ex ) {
       clue( ex );
+    }
     return false;
+  }
   /**
    * Returns the node associated with this {@link TextResource}.
+   *
    * @return The view component for the {@link TextResource}.
    */
   Node getNode();
   /**
    * Answers whether the resource has been modified.
+   *
    * @return {@code true} the resource has changed; {@code false} means that
    * no changes to the resource have been made.
    */
   default boolean isModified() {
     return modifiedProperty().get();
+  }
   /**
    * Returns a property that answers whether this text resource has been
    * changed from the original text that was opened.
+   *
    * @return A property representing the modified state of this
    * {@link TextResource}.
    */
   ReadOnlyBooleanProperty modifiedProperty();
   /**
    * Lowers the modified flag such that listeners to the modified property
    * will be informed that the text that's being edited no longer differs
    * from what's persisted.
    */
   void clearModifiedProperty();
   private String asString( final byte[] text, final Charset encoding ) {
     return new String( text, encoding );
+  }
   /**
    * Converts the given string to an array of bytes using the encoding that was
    * originally detected (if any) and associated with this file.
+   *
    * @param text The text to convert into the original file encoding.
    * @return A series of bytes ready for writing to a file.
    */
   private byte[] asBytes( final String text ) {
     return text.getBytes( getEncoding() );
+  }
   private Charset detectEncoding( final byte[] bytes ) {
     final var detector = new UniversalDetector( null );
     detector.handleData( bytes, 0, bytes.length );
     detector.dataEnd();
     final var charset = detector.getDetectedCharset();
     return charset == null
       ? DEFAULT_CHARSET
       : forName( charset.toUpperCase( ENGLISH ) );
+  }
   /**
    * Answers whether the given resource are of the same conceptual type. This
    * method is intended to be overridden by subclasses.
+   *
    * @param mediaType The type to compare.
    * @return {@code true} if the {@link TextResource} is compatible with the
    * given {@link MediaType}.
    */
   default boolean supports( final MediaType mediaType ) {
     return isMediaType( mediaType );
+  }
+}

A src/main/java/com/keenwrite/editors/common/Caret.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.common;
 import com.keenwrite.util.GenericBuilder;
 import java.util.function.Supplier;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.Constants.STATUS_BAR_LINE;
 /**
  * Represents the absolute, relative, and maximum position of the caret. The
  * caret position is a character offset into the text.
  */
 public class Caret {
   private final Mutator mMutator;
   public static GenericBuilder<Caret.Mutator, Caret> builder() {
     return GenericBuilder.of( Caret.Mutator::new, Caret::new );
+  }
   /**
    * Configures a caret.
    */
   public static class Mutator {
     /**
      * Caret's current paragraph index (i.e., current caret line number).
      */
     private Supplier<Integer> mParagraph = () -> 0;
     /**
      * Used to count the number of lines in the text editor document.
      */
     private Supplier<Integer> mParagraphs = () -> 1;
     /**
      * Caret offset into the current paragraph, represented as a string index.
      */
     private Supplier<Integer> mParaOffset = () -> 0;
     /**
      * Caret offset into the full text, represented as a string index.
      */
     private Supplier<Integer> mTextOffset = () -> 0;
     /**
      * Total number of characters in the document.
      */
     private Supplier<Integer> mTextLength = () -> 0;
     /**
      * Sets the {@link Supplier} for the caret's current paragraph number.
+     *
      * @param paragraph Returns the document caret paragraph index.
      */
     public void setParagraph( final Supplier<Integer> paragraph ) {
       assert paragraph != null;
       mParagraph = paragraph;
+    }
     /**
      * Sets the {@link Supplier} for the total number of document paragraphs.
+     *
      * @param paragraphs Returns the document paragraph count.
      */
     public void setParagraphs( final Supplier<Integer> paragraphs ) {
       assert paragraphs != null;
       mParagraphs = paragraphs;
+    }
     /**
      * Sets the {@link Supplier} for the caret's current character offset
      * into the current paragraph.
+     *
      * @param paraOffset Returns the caret's paragraph character index.
      */
     public void setParaOffset( final Supplier<Integer> paraOffset ) {
       assert paraOffset != null;
       mParaOffset = paraOffset;
+    }
     /**
      * Sets the {@link Supplier} for the caret's current document position.
      * A value of 0 represents the start of the document.
+     *
      * @param textOffset Returns the text offset into the current document.
      */
     public void setTextOffset( final Supplier<Integer> textOffset ) {
       assert textOffset != null;
       mTextOffset = textOffset;
+    }
     /**
      * Sets the {@link Supplier} for the document's total character count.
+     *
      * @param textLength Returns the total character count in the document.
      */
     public void setTextLength( final Supplier<Integer> textLength ) {
       assert textLength != null;
       mTextLength = textLength;
+    }
+  }
   /**
    * Force using the builder pattern.
    */
   private Caret( final Mutator mutator ) {
     assert mutator != null;
     mMutator = mutator;
+  }
   /**
    * Answers whether the caret's offset into the text is between the given
    * offsets.
+   *
    * @param began Starting value compared against the caret's text offset.
    * @param ended Ending value compared against the caret's text offset.
    * @return {@code true} when the caret's text offset is between the given
    * values, inclusively (for either value).
    */
   public boolean isBetweenText( final int began, final int ended ) {
     final var offset = getTextOffset();
     return began <= offset && offset <= ended;
+  }
   /**
    * Answers whether the caret's offset into the paragraph is before the given
    * offset.
+   *
    * @param offset Compared against the caret's paragraph offset.
    * @return {@code true} the caret's offset is before the given offset.
    */
   public boolean isBeforeColumn( final int offset ) {
     return getParaOffset() < offset;
+  }
   /**
    * Answers whether the caret's offset into the text is before the given
    * text offset.
+   *
    * @param offset Compared against the caret's text offset.
    * @return {@code true} the caret's offset is after the given offset.
    */
   public boolean isAfterColumn( final int offset ) {
     return getParaOffset() > offset;
+  }
   /**
    * Answers whether the caret's offset into the text exceeds the length of
    * the text.
+   *
    * @return {@code true} when the caret is at the end of the text boundary.
    */
   public boolean isAfterText() {
     return getTextOffset() >= getTextLength();
+  }
   public boolean isAfter( final int offset ) {
     return offset >= getTextOffset();
+  }
   private int getParagraph() {
     return mMutator.mParagraph.get();
+  }
   /**
    * Returns the number of lines in the text editor.
+   *
    * @return The size of the text editor's paragraph list plus one.
    */
   private int getParagraphCount() {
     return mMutator.mParagraphs.get();
+  }
   /**
    * Returns the absolute position of the caret within the entire document.
+   *
    * @return A zero-based index of the caret position.
    */
   private int getTextOffset() {
     return mMutator.mTextOffset.get();
+  }
   /**
    * Returns the position of the caret within the current paragraph being
    * edited.
+   *
    * @return A zero-based index of the caret position relative to the
    * current paragraph.
    */
   private int getParaOffset() {
     return mMutator.mParaOffset.get();
+  }
   /**
    * Returns the total number of characters in the document being edited.
+   *
    * @return A zero-based count of the total characters in the document.
    */
   private int getTextLength() {
     return mMutator.mTextLength.get();
+  }
   /**
    * Returns a human-readable string that shows the current caret position
    * within the text. Typically, this will include the current line number,
    * the number of lines, and the character offset into the text.
    * <p>
    * If the {@link Caret} has not been properly built, this will return a
    * string for the status bar having all values set to zero. This can happen
    * during unit testing.
+   *
    * @return A string to present to an end user.
    */
   @Override
   public String toString() {
     try {
       return get( STATUS_BAR_LINE,
                   getParagraph() + 1,
                   getParagraphCount(),
                   getTextOffset() + 1 );
     } catch( final Exception ex ) {
       return get( STATUS_BAR_LINE, 0, 0, 0 );
+    }
+  }
+}

A src/main/java/com/keenwrite/editors/common/ScrollEventHandler.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.common;
 import com.keenwrite.events.ScrollLockEvent;
 import javafx.beans.property.BooleanProperty;
 import javafx.beans.property.SimpleBooleanProperty;
 import javafx.event.Event;
 import javafx.event.EventHandler;
 import javafx.scene.control.ScrollBar;
 import javafx.scene.control.skin.ScrollBarSkin;
 import javafx.scene.input.MouseEvent;
 import javafx.scene.input.ScrollEvent;
 import javafx.scene.layout.StackPane;
 import org.fxmisc.flowless.VirtualizedScrollPane;
 import org.fxmisc.richtext.StyleClassedTextArea;
 import org.greenrobot.eventbus.Subscribe;
 import javax.swing.*;
 import java.util.function.Consumer;
 import static com.keenwrite.events.Bus.register;
 import static java.lang.Math.max;
 import static java.lang.Math.min;
 import static javafx.geometry.Orientation.VERTICAL;
 import static javax.swing.SwingUtilities.invokeLater;
 /**
  * Converts scroll events from {@link VirtualizedScrollPane} scroll bars to
  * an instance of {@link JScrollBar}.
  * <p>
  * Called to synchronize the scrolling areas for either scrolling with the
  * mouse or scrolling using the scrollbar's thumb. Both are required to avoid
  * scrolling on the estimatedScrollYProperty that occurs when text events
  * fire. Scrolling performed for text events are handled separately to ensure
  * the preview panel scrolls to the same position in the Markdown editor,
  * taking into account things like images, tables, and other potentially
  * long vertical presentation items.
  * </p>
  */
 public final class ScrollEventHandler implements EventHandler<Event> {
   private final class MouseHandler implements EventHandler<MouseEvent> {
     private final EventHandler<? super MouseEvent> mOldHandler;
     /**
      * Constructs a new handler for mouse scrolling events.
+     *
      * @param oldHandler Receives the event after scrolling takes place.
      */
     private MouseHandler( final EventHandler<? super MouseEvent> oldHandler ) {
       mOldHandler = oldHandler;
+    }
     @Override
     public void handle( final MouseEvent event ) {
       ScrollEventHandler.this.handle( event );
       mOldHandler.handle( event );
+    }
+  }
   private final class ScrollHandler implements EventHandler<ScrollEvent> {
     @Override
     public void handle( final ScrollEvent event ) {
       ScrollEventHandler.this.handle( event );
+    }
+  }
   private final VirtualizedScrollPane<StyleClassedTextArea> mEditorScrollPane;
   private final JScrollBar mPreviewScrollBar;
   private final BooleanProperty mEnabled = new SimpleBooleanProperty();
   private boolean mLocked;
   /**
    * @param editorScrollPane Scroll event source (human movement).
    * @param previewScrollBar Scroll event destination (corresponding movement).
    */
   public ScrollEventHandler(
     final VirtualizedScrollPane<StyleClassedTextArea> editorScrollPane,
     final JScrollBar previewScrollBar ) {
     mEditorScrollPane = editorScrollPane;
     mPreviewScrollBar = previewScrollBar;
     mEditorScrollPane.addEventFilter( ScrollEvent.ANY, new ScrollHandler() );
     initVerticalScrollBarThumb(
       mEditorScrollPane,
       thumb -> {
         final var handler = new MouseHandler( thumb.getOnMouseDragged() );
         thumb.setOnMouseDragged( handler );
+      }
     );
     register( this );
+  }
   /**
    * Gets a property intended to be bound to selected property of the tab being
    * scrolled. This is required because there's only one preview pane but
    * multiple editor panes. Each editor pane maintains its own scroll position.
+   *
    * @return A {@link BooleanProperty} representing whether the scroll
    * events for this tab are to be executed.
    */
   public BooleanProperty enabledProperty() {
     return mEnabled;
+  }
   /**
    * Scrolls the preview scrollbar relative to the edit scrollbar. Algorithm
    * is based on Karl Tauber's ratio calculation.
+   *
    * @param event Unused; either {@link MouseEvent} or {@link ScrollEvent}
    */
   @Override
   public void handle( final Event event ) {
     invokeLater( () -> {
       if( isEnabled() ) {
         // e prefix is for editor pane.
         final var eScrollPane = getEditorScrollPane();
         final var eScrollY =
           eScrollPane.estimatedScrollYProperty().getValue().intValue();
         final var eHeight = (int)
           (eScrollPane.totalHeightEstimateProperty().getValue().intValue()
             - eScrollPane.getHeight());
         final var eRatio = eHeight > 0
           ? min( max( eScrollY / (float) eHeight, 0 ), 1 ) : 0;
         // p prefix is for preview pane.
         final var pScrollBar = getPreviewScrollBar();
         final var pHeight = pScrollBar.getMaximum() - pScrollBar.getHeight();
         final var pScrollY = (int) (pHeight * eRatio);
         pScrollBar.setValue( pScrollY );
         pScrollBar.getParent().repaint();
+      }
     } );
+  }
   @Subscribe
   public void handle( final ScrollLockEvent event ) {
     mLocked = event.isLocked();
+  }
   private void initVerticalScrollBarThumb(
     final VirtualizedScrollPane<StyleClassedTextArea> pane,
     final Consumer<StackPane> consumer ) {
     // When the skin property is set, the stack pane is available (not null).
     getVerticalScrollBar( pane ).skinProperty().addListener( ( c, o, n ) -> {
       for( final var node : ((ScrollBarSkin) n).getChildren() ) {
         // Brittle, but what can you do?
         if( node.getStyleClass().contains( "thumb" ) ) {
           consumer.accept( (StackPane) node );
+        }
+      }
     } );
+  }
   /**
    * Returns the vertical {@link ScrollBar} instance associated with the
    * given scroll pane. This is {@code null}-safe because the scroll pane
    * initializes its vertical {@link ScrollBar} upon construction.
+   *
    * @param pane The scroll pane that contains a vertical {@link ScrollBar}.
    * @return The vertical {@link ScrollBar} associated with the scroll pane.
    * @throws IllegalStateException Could not obtain the vertical scroll bar.
    */
   private ScrollBar getVerticalScrollBar(
     final VirtualizedScrollPane<StyleClassedTextArea> pane ) {
     for( final var node : pane.getChildrenUnmodifiable() ) {
       if( node instanceof final ScrollBar scrollBar &&
         scrollBar.getOrientation() == VERTICAL ) {
         return scrollBar;
+      }
+    }
     throw new IllegalStateException( "No vertical scroll bar found." );
+  }
   private boolean isEnabled() {
     // TODO: As a minor optimization, when this is set to false, it could remove
     // the MouseHandler and ScrollHandler so that events only dispatch to one
     // object (instead of one per editor tab).
     return mEnabled.get() && !mLocked;
+  }
   private VirtualizedScrollPane<StyleClassedTextArea> getEditorScrollPane() {
     return mEditorScrollPane;
+  }
   private JScrollBar getPreviewScrollBar() {
     return mPreviewScrollBar;
+  }
+}

A src/main/java/com/keenwrite/editors/common/VariableNameInjector.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.common;
 import com.keenwrite.editors.TextDefinition;
 import com.keenwrite.editors.TextEditor;
 import com.keenwrite.editors.definition.DefinitionTreeItem;
 import com.keenwrite.io.MediaType;
 import com.keenwrite.preferences.Key;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.processors.r.RInlineEvaluator;
 import com.keenwrite.sigils.PropertyKeyOperator;
 import com.keenwrite.sigils.RKeyOperator;
 import java.util.function.UnaryOperator;
 import static com.keenwrite.constants.Constants.*;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preferences.AppKeys.*;
 /**
  * Provides the logic for injecting variable names within the editor.
  */
 public final class VariableNameInjector {
   private final Workspace mWorkspace;
   public VariableNameInjector( final Workspace workspace ) {
     assert workspace != null;
     mWorkspace = workspace;
+  }
   /**
    * Find a node that matches the current word and substitute the definition
    * reference. After calling this method the document being edited will have
    * the word under the caret replaced with a corresponding variable name
    * bracketed by sigils according to the document's media type.
+   *
    * @param editor      The editor having a caret and a word under that caret.
    * @param definitions The list of variable definitions to search for a value
    *                    that matches the word under the caret.
    */
   public void autoinsert(
     final TextEditor editor,
     final TextDefinition definitions ) {
     assert editor != null;
     assert definitions != null;
     try {
       if( definitions.isEmpty() ) {
         clue( STATUS_DEFINITION_EMPTY );
+      }
       else {
         final var indexes = editor.getCaretWord();
         final var word = editor.getText( indexes );
         if( word.isBlank() ) {
           clue( STATUS_DEFINITION_BLANK );
+        }
         else {
           final var leaf = findLeaf( definitions, word );
           if( leaf == null ) {
             clue( STATUS_DEFINITION_MISSING, word );
+          }
           else {
             insert( editor, leaf );
             definitions.expand( leaf );
+          }
+        }
+      }
     } catch( final Exception ex ) {
       clue( STATUS_DEFINITION_BLANK, ex );
+    }
+  }
   public void insert(
     final TextEditor editor,
     final DefinitionTreeItem<String> leaf ) {
     assert editor != null;
     assert leaf != null;
     final var mediaType = editor.getMediaType();
     final var operator = createOperator( mediaType );
     final var indexes = editor.getCaretWord();
     editor.replaceText( indexes, operator.apply( leaf.toPath() ) );
+  }
   /**
    * Creates an instance of {@link UnaryOperator} that can wrap a value with
    * sigils.
+   *
    * @param mediaType The type of document with variables to sigilize.
    * @return An operator that produces sigilized variable names.
    */
   private UnaryOperator<String> createOperator( final MediaType mediaType ) {
     final String began;
     final String ended;
     final UnaryOperator<String> operator;
     switch( mediaType ) {
       case TEXT_MARKDOWN -> {
         began = getString( KEY_DEF_DELIM_BEGAN );
         ended = getString( KEY_DEF_DELIM_ENDED );
         operator = s -> s;
+      }
       case TEXT_R_MARKDOWN -> {
         began = RInlineEvaluator.PREFIX + getString( KEY_R_DELIM_BEGAN );
         ended = getString( KEY_R_DELIM_ENDED ) + RInlineEvaluator.SUFFIX;
         operator = new RKeyOperator();
+      }
       case TEXT_PROPERTIES -> {
         began = PropertyKeyOperator.BEGAN;
         ended = PropertyKeyOperator.ENDED;
         operator = s -> s;
+      }
       default -> {
         began = "";
         ended = "";
         operator = s -> s;
+      }
+    }
     return s -> began + operator.apply( s ) + ended;
+  }
   private String getString( final Key key ) {
     assert key != null;
     return mWorkspace.getString( key );
+  }
   /**
    * Looks for the given word, matching first by exact, next by a starts-with
    * condition with diacritics replaced, then by containment.
+   *
    * @param word Match the word by: exact, beginning, containment, or other.
    */
   @SuppressWarnings( "ConstantConditions" )
   private static DefinitionTreeItem<String> findLeaf(
     final TextDefinition definition, final String word ) {
     assert definition != null;
     assert word != null;
     DefinitionTreeItem<String> leaf = null;
     leaf = leaf == null ? definition.findLeafExact( word ) : leaf;
     leaf = leaf == null ? definition.findLeafStartsWith( word ) : leaf;
     leaf = leaf == null ? definition.findLeafContains( word ) : leaf;
     leaf = leaf == null ? definition.findLeafContainsNoCase( word ) : leaf;
     return leaf;
+  }
+}

A src/main/java/com/keenwrite/editors/definition/DefinitionEditor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.definition;
 import com.keenwrite.constants.Constants;
 import com.keenwrite.editors.TextDefinition;
 import com.keenwrite.events.InsertDefinitionEvent;
 import com.keenwrite.events.TextDefinitionFocusEvent;
 import com.keenwrite.processors.r.Engine;
 import com.keenwrite.ui.tree.AltTreeView;
 import com.keenwrite.ui.tree.TreeItemConverter;
 import javafx.beans.property.BooleanProperty;
 import javafx.beans.property.ReadOnlyBooleanProperty;
 import javafx.beans.property.SimpleBooleanProperty;
 import javafx.beans.value.ObservableValue;
 import javafx.collections.ObservableList;
 import javafx.event.ActionEvent;
 import javafx.event.Event;
 import javafx.event.EventHandler;
 import javafx.scene.Node;
 import javafx.scene.control.*;
 import javafx.scene.input.KeyEvent;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.HBox;
 import java.io.File;
 import java.nio.charset.Charset;
 import java.util.*;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.Constants.*;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.ui.fonts.IconFactory.createGraphic;
 import static javafx.geometry.Pos.CENTER;
 import static javafx.geometry.Pos.TOP_CENTER;
 import static javafx.scene.control.SelectionMode.MULTIPLE;
 import static javafx.scene.control.TreeItem.childrenModificationEvent;
 import static javafx.scene.control.TreeItem.valueChangedEvent;
 import static javafx.scene.input.KeyEvent.KEY_PRESSED;
 /**
  * Provides the user interface that holds a {@link TreeView}, which
  * allows users to interact with key/value pairs loaded from the
  * document parser and adapted using a {@link TreeTransformer}.
  */
 public final class DefinitionEditor extends BorderPane
   implements TextDefinition {
   /**
    * Contains the root that is added to the view.
    */
   private final DefinitionTreeItem<String> mTreeRoot = createRootTreeItem();
   /**
    * Contains a view of the definitions.
    */
   private final TreeView<String> mTreeView =
     new AltTreeView<>( mTreeRoot, new TreeItemConverter() );
   /**
    * Used to adapt the structured document into a {@link TreeView}.
    */
   private final TreeTransformer mTreeTransformer;
   /**
    * Handlers for key press events.
    */
   private final Set<EventHandler<? super KeyEvent>> mKeyEventHandlers
     = new HashSet<>();
   private final Map<String, String> mDefinitions = new HashMap<>();
   /**
    * Opened file's character encoding, or {@link Constants#DEFAULT_CHARSET} if
    * either no encoding could be determined or this is a new (empty) file.
    */
   private final Charset mEncoding;
   /**
    * Tracks whether the in-memory definitions have changed with respect to the
    * persisted definitions.
    */
   private final BooleanProperty mModified = new SimpleBooleanProperty();
   /**
    * File being edited by this editor instance, which may be renamed.
    */
   private File mFile;
   /**
    * This is provided for unit tests that are not backed by files.
+   *
    * @param treeTransformer Responsible for transforming the definitions into
    *                        {@link TreeItem} instances.
    */
   public DefinitionEditor(
     final TreeTransformer treeTransformer ) {
     this( DEFINITION_DEFAULT, treeTransformer );
+  }
   /**
    * Constructs a definition pane with a given tree view root.
+   *
    * @param file The file of definitions to maintain through the UI.
    */
   public DefinitionEditor(
     final File file,
     final TreeTransformer treeTransformer ) {
     assert file != null;
     assert treeTransformer != null;
     mFile = file;
     mTreeTransformer = treeTransformer;
     mTreeView.setContextMenu( createContextMenu() );
     mTreeView.addEventFilter( KEY_PRESSED, this::keyEventFilter );
     mTreeView.focusedProperty().addListener( this::focused );
     getSelectionModel().setSelectionMode( MULTIPLE );
     final var buttonBar = new HBox();
     buttonBar.getChildren().addAll(
       createButton( "create", e -> createDefinition() ),
       createButton( "rename", e -> renameDefinition() ),
       createButton( "delete", e -> deleteDefinitions() )
     );
     buttonBar.setAlignment( CENTER );
     buttonBar.setSpacing( UI_CONTROL_SPACING );
     setTop( buttonBar );
     setCenter( mTreeView );
     setAlignment( buttonBar, TOP_CENTER );
     mEncoding = open( mFile );
     updateDefinitions( getDefinitions(), getTreeView().getRoot() );
     // After the file is opened, watch for changes, not before. Otherwise,
     // upon saving, users will be prompted to save a file that hasn't had
     // any modifications (from their perspective).
     addTreeChangeHandler( event -> {
       mModified.set( true );
       updateDefinitions( getDefinitions(), getTreeView().getRoot() );
     } );
+  }
   /**
    * Replaces the given list of variable definitions with a flat hierarchy
    * of the converted {@link TreeView} root.
+   *
    * @param definitions The definition map to update.
    * @param root        The values to flatten then insert into the map.
    */
   private void updateDefinitions(
     final Map<String, String> definitions,
     final TreeItem<String> root ) {
     definitions.clear();
     definitions.putAll( TreeItemMapper.convert( root ) );
     Engine.clear();
+  }
   /**
    * Returns the variable definitions.
+   *
    * @return The definition map.
    */
   @Override
   public Map<String, String> getDefinitions() {
     return mDefinitions;
+  }
   @Override
   public void setText( final String document ) {
     final var foster = mTreeTransformer.transform( document );
     final var biological = getTreeRoot();
     for( final var child : foster.getChildren() ) {
       biological.getChildren().add( child );
+    }
     getTreeView().refresh();
+  }
   @Override
   public String getText() {
     final var result = new StringBuilder( 32768 );
     try {
       result.append( mTreeTransformer.transform( getTreeView().getRoot() ) );
       final var problem = isTreeWellFormed();
       problem.ifPresent( node -> clue( "yaml.error.tree.form", node ) );
     } catch( final Exception ex ) {
       // Catch errors while checking for a well-formed tree (e.g., stack smash).
       // Also catch any transformation exceptions (e.g., Json processing).
       clue( ex );
+    }
     return result.toString();
+  }
   @Override
   public File getFile() {
     return mFile;
+  }
   @Override
   public void rename( final File file ) {
     mFile = file;
+  }
   @Override
   public Charset getEncoding() {
     return mEncoding;
+  }
   @Override
   public Node getNode() {
     return this;
+  }
   @Override
   public ReadOnlyBooleanProperty modifiedProperty() {
     return mModified;
+  }
   @Override
   public void clearModifiedProperty() {
     mModified.setValue( false );
+  }
   private Button createButton(
     final String msgKey, final EventHandler<ActionEvent> eventHandler ) {
     final var keyPrefix = Constants.ACTION_PREFIX + "definition." + msgKey;
     final var button = new Button( get( keyPrefix + ".text" ) );
     final var graphic = createGraphic( get( keyPrefix + ".icon" ) );
     button.setOnAction( eventHandler );
     button.setGraphic( graphic );
     button.setTooltip( new Tooltip( get( keyPrefix + ".tooltip" ) ) );
     return button;
+  }
   /**
    * Informs the caller of whenever any {@link TreeItem} in the {@link TreeView}
    * is modified. The modifications include: item value changes, item additions,
    * and item removals.
    * <p>
    * Safe to call multiple times; if a handler is already registered, the
    * old handler is used.
    * </p>
+   *
    * @param handler The handler to call whenever any {@link TreeItem} changes.
    */
   public void addTreeChangeHandler(
     final EventHandler<TreeItem.TreeModificationEvent<Event>> handler ) {
     final var root = getTreeView().getRoot();
     root.addEventHandler( valueChangedEvent(), handler );
     root.addEventHandler( childrenModificationEvent(), handler );
+  }
   /**
    * Answers whether the {@link TreeItem}s in the {@link TreeView} are suitably
    * well-formed for export. A tree is considered well-formed if the following
    * conditions are met:
+   *
    * <ul>
    *   <li>The root node contains at least one child node having a leaf.</li>
    *   <li>There are no leaf nodes with sibling leaf nodes.</li>
    * </ul>
+   *
    * @return {@code null} if the document is well-formed, otherwise the
    * problematic child {@link TreeItem}.
    */
   public Optional<TreeItem<String>> isTreeWellFormed() {
     final var root = getTreeView().getRoot();
     for( final var child : root.getChildren() ) {
       final var problemChild = isWellFormed( child );
       if( child.isLeaf() || problemChild != null ) {
         return Optional.ofNullable( problemChild );
+      }
+    }
     return Optional.empty();
+  }
   /**
    * Determines whether the document is well-formed by ensuring that
    * child branches do not contain multiple leaves.
+   *
    * @param item The subtree to check for well-formedness.
    * @return {@code null} when the tree is well-formed, otherwise the
    * problematic {@link TreeItem}.
    */
   private TreeItem<String> isWellFormed( final TreeItem<String> item ) {
     int childLeafs = 0;
     int childBranches = 0;
     for( final var child : item.getChildren() ) {
       if( child.isLeaf() ) {
         childLeafs++;
+      }
       else {
         childBranches++;
+      }
       final var problemChild = isWellFormed( child );
       if( problemChild != null ) {
         return problemChild;
+      }
+    }
     return ((childBranches > 0 && childLeafs == 0) ||
       (childBranches == 0 && childLeafs <= 1)) ? null : item;
+  }
   @Override
   public DefinitionTreeItem<String> findLeafExact( final String text ) {
     return getTreeRoot().findLeafExact( text );
+  }
   @Override
   public DefinitionTreeItem<String> findLeafContains( final String text ) {
     return getTreeRoot().findLeafContains( text );
+  }
   @Override
   public DefinitionTreeItem<String> findLeafContainsNoCase(
     final String text ) {
     return getTreeRoot().findLeafContainsNoCase( text );
+  }
   @Override
   public DefinitionTreeItem<String> findLeafStartsWith( final String text ) {
     return getTreeRoot().findLeafStartsWith( text );
+  }
   public void select( final TreeItem<String> item ) {
     getSelectionModel().clearSelection();
     getSelectionModel().select( getTreeView().getRow( item ) );
+  }
   /**
    * Collapses the tree, recursively.
    */
   public void collapse() {
     collapse( getTreeRoot().getChildren() );
+  }
   /**
    * Collapses the tree, recursively.
+   *
    * @param <T>   The type of tree item to expand (usually String).
    * @param nodes The nodes to collapse.
    */
   private <T> void collapse( final ObservableList<TreeItem<T>> nodes ) {
     for( final var node : nodes ) {
       node.setExpanded( false );
       collapse( node.getChildren() );
+    }
+  }
   /**
    * @return {@code true} when the user is editing a {@link TreeItem}.
    */
   private boolean isEditingTreeItem() {
     return getTreeView().editingItemProperty().getValue() != null;
+  }
   /**
    * Changes to edit mode for the selected item.
    */
   @Override
   public void renameDefinition() {
     getTreeView().edit( getSelectedItem() );
+  }
   /**
    * Removes all selected items from the {@link TreeView}.
    */
   @Override
   public void deleteDefinitions() {
     for( final var item : getSelectedItems() ) {
       final var parent = item.getParent();
       if( parent != null ) {
         parent.getChildren().remove( item );
+      }
+    }
+  }
   /**
    * Deletes the selected item.
    */
   private void deleteSelectedItem() {
     final var c = getSelectedItem();
     getSiblings( c ).remove( c );
+  }
   private void insertSelectedItem() {
     if( getSelectedItem() instanceof DefinitionTreeItem<String> node ) {
       if( node.isLeaf() ) {
         InsertDefinitionEvent.fire( node );
+      }
+    }
+  }
   /**
    * Adds a new item under the selected item (or root if nothing is selected).
    * There are a few conditions to consider: when adding to the root,
    * when adding to a leaf, and when adding to a non-leaf. Items added to the
    * root must contain two items: a key and a value.
    */
   @Override
   public void createDefinition() {
     final var value = createDefinitionTreeItem();
     getSelectedItem().getChildren().add( value );
     expand( value );
     select( value );
+  }
   private ContextMenu createContextMenu() {
     final var menu = new ContextMenu();
     final var items = menu.getItems();
     addMenuItem( items, ACTION_PREFIX + "definition.create.text" )
       .setOnAction( e -> createDefinition() );
     addMenuItem( items, ACTION_PREFIX + "definition.rename.text" )
       .setOnAction( e -> renameDefinition() );
     addMenuItem( items, ACTION_PREFIX + "definition.delete.text" )
       .setOnAction( e -> deleteSelectedItem() );
     addMenuItem( items, ACTION_PREFIX + "definition.insert.text" )
       .setOnAction( e -> insertSelectedItem() );
     return menu;
+  }
   /**
    * Executes hot-keys for edits to the definition tree.
+   *
    * @param event Contains the key code of the key that was pressed.
    */
   private void keyEventFilter( final KeyEvent event ) {
     if( !isEditingTreeItem() ) {
       switch( event.getCode() ) {
         case ENTER -> {
           expand( getSelectedItem() );
           event.consume();
+        }
         case DELETE -> deleteDefinitions();
         case INSERT -> createDefinition();
         case R -> {
           if( event.isControlDown() ) {
             renameDefinition();
+          }
+        }
+      }
       for( final var handler : getKeyEventHandlers() ) {
         handler.handle( event );
+      }
+    }
+  }
   /**
    * Called when the editor's input focus changes. This will fire an event
    * for subscribers.
+   *
    * @param ignored Not used.
    * @param o       The old input focus property value.
    * @param n       The new input focus property value.
    */
   private void focused(
     final ObservableValue<? extends Boolean> ignored,
     final Boolean o,
     final Boolean n ) {
     if( n != null && n ) {
       TextDefinitionFocusEvent.fire( this );
+    }
+  }
   /**
    * Adds a menu item to a list of menu items.
+   *
    * @param items    The list of menu items to append to.
    * @param labelKey The resource bundle key name for the menu item's label.
    * @return The menu item added to the list of menu items.
    */
   private MenuItem addMenuItem(
     final List<MenuItem> items, final String labelKey ) {
     final MenuItem menuItem = createMenuItem( labelKey );
     items.add( menuItem );
     return menuItem;
+  }
   private MenuItem createMenuItem( final String labelKey ) {
     return new MenuItem( get( labelKey ) );
+  }
   /**
    * Creates a new {@link TreeItem} that is intended to be the root-level item
    * added to the {@link TreeView}. This allows the root item to be
    * distinguished from the other items so that reference keys do not include
    * "Definition" as part of their name.
+   *
    * @return A new {@link TreeItem}, never {@code null}.
    */
   private RootTreeItem<String> createRootTreeItem() {
     return new RootTreeItem<>( get( "Pane.definition.node.root.title" ) );
+  }
   private DefinitionTreeItem<String> createDefinitionTreeItem() {
     return new DefinitionTreeItem<>( get( "Definition.menu.add.default" ) );
+  }
   @Override
   public void requestFocus() {
     getTreeView().requestFocus();
+  }
   /**
    * Expands the node to the root, recursively.
+   *
    * @param <T>  The type of tree item to expand (usually String).
    * @param node The node to expand.
    */
   @Override
   public <T> void expand( final TreeItem<T> node ) {
     if( node != null ) {
       expand( node.getParent() );
       node.setExpanded( !node.isLeaf() );
+    }
+  }
   /**
    * Answers whether there are any definitions in the tree.
+   *
    * @return {@code true} when there are no definitions; {@code false} when
    * there's at least one definition.
    */
   @Override
   public boolean isEmpty() {
     return getTreeRoot().isEmpty();
+  }
   /**
    * Returns the actively selected item in the tree.
+   *
    * @return The selected item, or the tree root item if no item is selected.
    */
   public TreeItem<String> getSelectedItem() {
     final var item = getSelectionModel().getSelectedItem();
     return item == null ? getTreeRoot() : item;
+  }
   /**
    * Returns the {@link TreeView} that contains the definition hierarchy.
+   *
    * @return A non-null instance.
    */
   private TreeView<String> getTreeView() {
     return mTreeView;
+  }
   /**
    * Returns the root of the tree.
+   *
    * @return The first node added to the definition tree.
    */
   private DefinitionTreeItem<String> getTreeRoot() {
     return mTreeRoot;
+  }
   private ObservableList<TreeItem<String>> getSiblings(
     final TreeItem<String> item ) {
     final var root = getTreeView().getRoot();
     final var parent = (item == null || item == root) ? root : item.getParent();
     return parent.getChildren();
+  }
   private MultipleSelectionModel<TreeItem<String>> getSelectionModel() {
     return getTreeView().getSelectionModel();
+  }
   /**
    * Returns a copy of all the selected items.
+   *
    * @return A list, possibly empty, containing all selected items in the
    * {@link TreeView}.
    */
   private List<TreeItem<String>> getSelectedItems() {
     return new ArrayList<>( getSelectionModel().getSelectedItems() );
+  }
   private Set<EventHandler<? super KeyEvent>> getKeyEventHandlers() {
     return mKeyEventHandlers;
+  }
+}

A src/main/java/com/keenwrite/editors/definition/DefinitionTreeItem.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.definition;
 import com.keenwrite.util.Diacritics;
 import javafx.scene.control.TreeItem;
 import java.util.Stack;
 import java.util.function.BiFunction;
 /**
  * Provides behaviour afforded to definition keys and corresponding value.
+ *
  * @param <T> The type of {@link TreeItem} (usually string).
  */
 public class DefinitionTreeItem<T> extends TreeItem<T> {
   /**
    * Constructs a new item with a default value.
+   *
    * @param value Passed up to superclass.
    */
   public DefinitionTreeItem( final T value ) {
     super( value );
+  }
   /**
    * Finds a leaf starting at the current node with text that matches the given
    * value. Search is performed case-sensitively.
+   *
    * @param text The text to match against each leaf in the tree.
    * @return The leaf that has a value exactly matching the given text.
    */
   public DefinitionTreeItem<T> findLeafExact( final String text ) {
     return findLeaf( text, DefinitionTreeItem::valueEquals );
+  }
   /**
    * Finds a leaf starting at the current node with text that matches the given
    * value. Search is performed case-sensitively.
+   *
    * @param text The text to match against each leaf in the tree.
    * @return The leaf that has a value that contains the given text.
    */
   public DefinitionTreeItem<T> findLeafContains( final String text ) {
     return findLeaf( text, DefinitionTreeItem::valueContains );
+  }
   /**
    * Finds a leaf starting at the current node with text that matches the given
    * value. Search is performed case-insensitively.
+   *
    * @param text The text to match against each leaf in the tree.
    * @return The leaf that has a value that contains the given text.
    */
   public DefinitionTreeItem<T> findLeafContainsNoCase( final String text ) {
     return findLeaf( text, DefinitionTreeItem::valueContainsNoCase );
+  }
   /**
    * Finds a leaf starting at the current node with text that matches the given
    * value. Search is performed case-sensitively.
+   *
    * @param text The text to match against each leaf in the tree.
    * @return The leaf that has a value that starts with the given text.
    */
   public DefinitionTreeItem<T> findLeafStartsWith( final String text ) {
     return findLeaf( text, DefinitionTreeItem::valueStartsWith );
+  }
   /**
    * Finds a leaf starting at the current node with text that matches the given
    * value.
+   *
    * @param text     The text to match against each leaf in the tree.
    * @param findMode What algorithm is used to match the given text.
    * @return The leaf that has a value starting with the given text, or {@code
    * null} if there was no match found.
    */
   @SuppressWarnings( "AssignmentUsedAsCondition" )
   public DefinitionTreeItem<T> findLeaf(
     final String text,
     final BiFunction<DefinitionTreeItem<T>, String, Boolean> findMode ) {
     final var stack = new Stack<DefinitionTreeItem<T>>();
     stack.push( this );
     // Don't hunt for blank (empty) keys.
     boolean found = text.isBlank();
     while( !found && !stack.isEmpty() ) {
       final var node = stack.pop();
       for( final var child : node.getChildren() ) {
         final var result = (DefinitionTreeItem<T>) child;
         if( result.isLeaf() ) {
           if( found = findMode.apply( result, text ) ) {
             return result;
+          }
+        }
         else {
           stack.push( result );
+        }
+      }
+    }
     return null;
+  }
   /**
    * Returns true if this node is a leaf and its value equals the given text.
+   *
    * @param s The text to compare against the node value.
    * @return true Node is a leaf and its value equals the given value.
    */
   private boolean valueEquals( final String s ) {
     return isLeaf() && getValue().equals( s );
+  }
   /**
    * Removes diacritic characters from the given definition item.
+   *
    * @param item The {@link DefinitionTreeItem} to strip of diacritics.
    * @param <T>  The type of item contained by {@link DefinitionTreeItem}s.
    * @return The given item, without any accented characters.
    */
   private static <T> String removeAccents( final DefinitionTreeItem<T> item ) {
     return Diacritics.remove( item.getValue().toString() );
+  }
   /**
    * Returns true if this node is a leaf and its value contains the given text.
+   *
    * @param s The text to compare against the node value.
    * @return true Node is a leaf and its value contains the given value.
    */
   private boolean valueContains( final String s ) {
     return isLeaf() && removeAccents( this ).contains( s );
+  }
   /**
    * Returns true if this node is a leaf and its value contains the given text.
+   *
    * @param s The text to compare against the node value.
    * @return true Node is a leaf and its value contains the given value.
    */
   private boolean valueContainsNoCase( final String s ) {
     return isLeaf() && removeAccents( this )
       .toLowerCase()
       .contains( s.toLowerCase() );
+  }
   /**
    * Returns true if this node is a leaf and its value starts with the given
    * text.
+   *
    * @param s The text to compare against the node value.
    * @return true Node is a leaf and its value starts with the given value.
    */
   private boolean valueStartsWith( final String s ) {
     return isLeaf() && removeAccents( this ).startsWith( s );
+  }
   /**
    * Returns the path for this node, with nodes made distinct using the
    * separator character. This uses two loops: one for pushing nodes onto a
    * stack and one for popping them off to create the path in desired order.
+   *
    * @return A non-null string, possibly empty.
    */
   public String toPath() {
     return TreeItemMapper.toPath( getParent() );
+  }
   /**
    * Answers whether there are any definitions in this tree.
+   *
    * @return {@code true} when there are no definitions in the tree; {@code
    * false} when there is at least one definition present.
    */
   public boolean isEmpty() {
     return getChildren().isEmpty();
+  }
+}

A src/main/java/com/keenwrite/editors/definition/RootTreeItem.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.definition;
 import javafx.scene.control.TreeItem;
 import javafx.scene.control.TreeView;
 /**
  * Marker interface for top-most {@link TreeItem}. This class allows the
  * {@link TreeItemMapper} to ignore the topmost definition. Such contortions
  * are necessary because {@link TreeView} requires a root item that isn't part
  * of the user's definition file.
  * <p>
  * Another approach would be to associate object pairs per {@link TreeItem},
  * but that would be a waste of memory since the only "exception" case is
  * the root {@link TreeItem}.
  * </p>
+ *
  * @param <T> The type of {@link TreeItem} to store in the {@link TreeView}.
  */
 public final class RootTreeItem<T> extends DefinitionTreeItem<T> {
   /**
    * Default constructor, calls the superclass, no other behaviour.
+   *
    * @param value The {@link TreeItem} node name to construct the superclass.
    * @see TreeItemMapper#convert(TreeItem) for details on how this
    * class is used.
    */
   public RootTreeItem( final T value ) {
     super( value );
+  }
+}

A src/main/java/com/keenwrite/editors/definition/TreeItemMapper.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.definition;
 import com.fasterxml.jackson.databind.JsonNode;
 import javafx.scene.control.TreeItem;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Stack;
 /**
  * Given a {@link TreeItem}, this will generate a flat map with all the
  * keys using a dot-separated notation to represent the tree's hierarchy.
+ *
  * <ol>
  *   <li>Load YAML file into {@link JsonNode} hierarchy.</li>
  *   <li>Convert JsonNode to a {@link TreeItem} hierarchy.</li>
  *   <li>Convert the {@link TreeItem} hierarchy into a flat map.</li>
  * </ol>
  */
 public final class TreeItemMapper {
   /**
    * Key name hierarchy separator (i.e., the dots in {@code root.node.var}).
    */
   public static final String SEPARATOR = ".";
   /**
    * Default buffer length for key names that should be large enough to
    * avoid reallocating memory to increase the {@link StringBuilder}'s
    * buffer.
    */
   public static final int DEFAULT_KEY_LENGTH = 64;
   /**
    * In-order traversal of a {@link TreeItem} hierarchy, exposing each item
    * as a consecutive list.
    */
   private static final class TreeIterator
     implements Iterator<TreeItem<String>> {
     private final Stack<TreeItem<String>> mStack = new Stack<>();
     public TreeIterator( final TreeItem<String> root ) {
       if( root != null ) {
         mStack.push( root );
+      }
+    }
     @Override
     public boolean hasNext() {
       return !mStack.isEmpty();
+    }
     @Override
     public TreeItem<String> next() {
       final var next = mStack.pop();
       next.getChildren().forEach( mStack::push );
       return next;
+    }
+  }
   /**
    * Iterate over a given root node (at any level of the tree) and process each
    * leaf node into a flat map.
+   *
    * @param root The topmost item in the tree.
    */
   public static Map<String, String> convert( final TreeItem<String> root ) {
     final var map = new HashMap<String, String>();
     new TreeIterator( root ).forEachRemaining( item -> {
       if( item.isLeaf() && item.getParent() != null ) {
         map.put( toPath( item.getParent() ), item.getValue() );
+      }
     } );
     return map;
+  }
   /**
    * For a given node, this will ascend the tree to generate a key name
    * that is associated with the leaf node's value.
+   *
    * @param node Ascendants represent the key to this node's value.
    * @param <T>  Data type that the {@link TreeItem} contains.
    * @return The string representation of the node's unique key.
    */
   public static <T> String toPath( TreeItem<T> node ) {
     final var key = new StringBuilder( DEFAULT_KEY_LENGTH );
     final var stack = new Stack<TreeItem<T>>();
     while( node != null && !(node instanceof RootTreeItem) ) {
       stack.push( node );
       node = node.getParent();
+    }
     // Gets set at end of first iteration (to avoid an if condition).
     var separator = "";
     while( !stack.empty() ) {
       final T subkey = stack.pop().getValue();
       key.append( separator );
       key.append( subkey );
       separator = SEPARATOR;
+    }
     return key.toString();
+  }
+}

A src/main/java/com/keenwrite/editors/definition/TreeTransformer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.definition;
 import javafx.scene.control.TreeItem;
 /**
  * Responsible for converting an object hierarchy into a {@link TreeItem}
  * hierarchy.
  */
 public interface TreeTransformer {
   /**
    * Adapts the document produced by the given parser into a {@link TreeItem}
    * object that can be presented to the user within a GUI. The root of the
    * tree must be merged by the view layer.
+   *
    * @param document The document to transform into a viewable hierarchy.
    */
   TreeItem<String> transform( String document );
   /**
    * Exports the given root node to the given path.
+   *
    * @param root The root node to export.
    */
   String transform( TreeItem<String> root );
+}

A src/main/java/com/keenwrite/editors/definition/package-info.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 /**
  * This package contains classes that pertain to hierarchical, structured
  * data formats, which can be used as interpolated variables.
  */
 package com.keenwrite.editors.definition;

A src/main/java/com/keenwrite/editors/definition/yaml/YamlTreeTransformer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.definition.yaml;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
 import com.fasterxml.jackson.dataformat.yaml.YAMLMapper;
 import com.keenwrite.editors.definition.DefinitionTreeItem;
 import com.keenwrite.editors.definition.TreeTransformer;
 import javafx.scene.control.TreeItem;
 import javafx.scene.control.TreeView;
 import java.util.Map.Entry;
 import static com.fasterxml.jackson.dataformat.yaml.YAMLGenerator.Feature.*;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Transforms a JsonNode hierarchy into a tree that can be displayed in a user
  * interface and vice-versa.
  */
 public final class YamlTreeTransformer implements TreeTransformer {
   private static final YAMLFactory sFactory;
   private static final YAMLMapper sMapper;
   static {
     sFactory = new YAMLFactory();
     sFactory.configure( MINIMIZE_QUOTES, true );
     sFactory.configure( SPLIT_LINES, false );
     sMapper = new YAMLMapper( sFactory );
+  }
   /**
    * Constructs a new instance that will use the given path to read the object
    * hierarchy from a data source.
    */
   public YamlTreeTransformer() {
+  }
   @Override
   public String transform( final TreeItem<String> treeItem ) {
     try {
       final var root = sMapper.createObjectNode();
       // Iterate over the root item's children. The root item is used by the
       // application to ensure definitions can always be added to a tree, as
       // such it is not meant to be exported, only its children.
       for( final var child : treeItem.getChildren() ) {
         transform( child, root );
+      }
       return sMapper.writeValueAsString( root );
     } catch( final Exception ex ) {
       clue( ex );
       throw new RuntimeException( ex );
+    }
+  }
   /**
    * Converts a YAML document to a {@link TreeItem} based on the document
    * keys.
+   *
    * @param document The YAML document to convert to a hierarchy of
    *                 {@link TreeItem} instances.
    * @throws StackOverflowError If infinite recursion is encountered.
    */
   @Override
   public TreeItem<String> transform( final String document ) {
     final var jsonNode = toJson( document );
     final var rootItem = createTreeItem( "root" );
     transform( jsonNode, rootItem );
     return rootItem;
+  }
   private JsonNode toJson( final String yaml ) {
     try {
       return new ObjectMapper( sFactory ).readTree( yaml );
     } catch( final Exception ex ) {
       // Ensure that a document root node exists.
       return new ObjectMapper().createObjectNode();
+    }
+  }
   /**
    * Recursive method to generate an object hierarchy that represents the
    * given {@link TreeItem} hierarchy.
+   *
    * @param item The {@link TreeItem} to reproduce as an object hierarchy.
    * @param node The {@link ObjectNode} to update to reflect the
    *             {@link TreeItem} hierarchy.
    */
   private void transform( final TreeItem<String> item, ObjectNode node ) {
     final var children = item.getChildren();
     // If the current item has more than one non-leaf child, it's an
     // object node and must become a new nested object.
     if( !(children.size() == 1 && children.get( 0 ).isLeaf()) ) {
       node = node.putObject( item.getValue() );
+    }
     for( final var child : children ) {
       if( child.isLeaf() ) {
         node.put( item.getValue(), child.getValue() );
+      }
       else {
         transform( child, node );
+      }
+    }
+  }
   /**
    * Iterate over a given root node (at any level of the tree) and adapt each
    * leaf node.
+   *
    * @param node A JSON node (YAML node) to adapt.
    * @param item The tree item to use as the root when processing the node.
    * @throws StackOverflowError If infinite recursion is encountered.
    */
   private void transform( final JsonNode node, final TreeItem<String> item ) {
     node.fields().forEachRemaining( leaf -> transform( leaf, item ) );
+  }
   /**
    * Recursively adapt each rootNode to a corresponding rootItem.
+   *
    * @param node The node to adapt.
    * @param item The item to adapt using the node's key.
    * @throws StackOverflowError If infinite recursion is encountered.
    */
   private void transform(
     final Entry<String, JsonNode> node, final TreeItem<String> item ) {
     final var leafNode = node.getValue();
     final var key = node.getKey();
     final var leaf = createTreeItem( key );
     if( leafNode.isValueNode() ) {
       leaf.getChildren().add( createTreeItem( node.getValue().asText() ) );
+    }
     item.getChildren().add( leaf );
     if( leafNode.isObject() ) {
       transform( leafNode, leaf );
+    }
+  }
   /**
    * Creates a new {@link TreeItem} that can be added to the {@link TreeView}.
+   *
    * @param value The node's value.
    * @return A new {@link TreeItem}, never {@code null}.
    */
   private TreeItem<String> createTreeItem( final String value ) {
     return new DefinitionTreeItem<>( value );
+  }
+}

A src/main/java/com/keenwrite/editors/definition/yaml/package-info.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 /**
  * This package contains classes that can parse YAML documents into a GUI
  * representation.
  */
 package com.keenwrite.editors.definition.yaml;

A src/main/java/com/keenwrite/editors/markdown/HyperlinkModel.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.markdown;
 import com.vladsch.flexmark.ast.Link;
 /**
  * Represents the model for a hyperlink: text, url, and title.
  */
 public final class HyperlinkModel {
   private String text;
   private String url;
   private String title;
   /**
    * Constructs a new hyperlink model in Markdown format by default with no
    * title (i.e., tooltip).
+   *
    * @param text The hyperlink text displayed (e.g., displayed to the user).
    * @param url  The destination URL (e.g., when clicked).
    */
   public HyperlinkModel( final String text, final String url ) {
     this( text, url, null );
+  }
   /**
    * Constructs a new hyperlink model for the given AST link.
+   *
    * @param link A Markdown link.
    */
   public HyperlinkModel( final Link link ) {
     this(
       link.getText().toString(),
       link.getUrl().toString(),
       link.getTitle().toString()
     );
+  }
   /**
    * Constructs a new hyperlink model in Markdown format by default.
+   *
    * @param text  The hyperlink text displayed (e.g., displayed to the user).
    * @param url   The destination URL (e.g., when clicked).
    * @param title The hyperlink title (e.g., shown as a tooltip).
    */
   public HyperlinkModel(
     final String text, final String url, final String title ) {
     setText( text );
     setUrl( url );
     setTitle( title );
+  }
   /**
    * Returns the string in Markdown format by default.
+   *
    * @return A Markdown version of the hyperlink.
    */
   @Override
   public String toString() {
     String format = "%s%s%s";
     if( hasText() ) {
       format = "[%s]" + (hasTitle() ? "(%s \"%s\")" : "(%s%s)");
+    }
     // Becomes ""+URL+"" if no text is set.
     // Becomes [TITLE]+(URL)+"" if no title is set.
     // Becomes [TITLE]+(URL+ \"TITLE\") if title is set.
     return String.format( format, getText(), getUrl(), getTitle() );
+  }
   public void setText( final String text ) {
     this.text = sanitize( text );
+  }
   public void setUrl( final String url ) {
     this.url = sanitize( url );
+  }
   public void setTitle( final String title ) {
     this.title = sanitize( title );
+  }
   /**
    * Answers whether text has been set for the hyperlink.
+   *
    * @return true This is a text link.
    */
   public boolean hasText() {
     return !getText().isEmpty();
+  }
   /**
    * Answers whether a title (tooltip) has been set for the hyperlink.
+   *
    * @return true There is a title.
    */
   public boolean hasTitle() {
     return !getTitle().isEmpty();
+  }
   public String getText() {
     return this.text;
+  }
   public String getUrl() {
     return this.url;
+  }
   public String getTitle() {
     return this.title;
+  }
   private String sanitize( final String s ) {
     return s == null ? "" : s;
+  }
+}

A src/main/java/com/keenwrite/editors/markdown/LinkVisitor.java

 /*
  * Copyright 2020-2021 White Magic Software, Ltd.
+ *
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
+ *
  *  o Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
+ *
  *  o Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 package com.keenwrite.editors.markdown;
 import com.vladsch.flexmark.ast.Link;
 import com.vladsch.flexmark.util.ast.Node;
 import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.VisitHandler;
 /**
  * Responsible for extracting a hyperlink from the document so that the user
  * can edit the link within a dialog.
  */
 public final class LinkVisitor {
   private NodeVisitor mVisitor;
   private Link mLink;
   private final int mOffset;
   /**
    * Creates a hyperlink given an offset into a paragraph and the Markdown AST
    * link node.
+   *
    * @param index Index into the paragraph that indicates the hyperlink to
    *              change.
    */
   public LinkVisitor( final int index ) {
     mOffset = index;
+  }
   public Link process( final Node root ) {
     getVisitor().visit( root );
     return getLink();
+  }
   /**
    * @param link Not null.
    */
   private void visit( final Link link ) {
     final int began = link.getStartOffset();
     final int ended = link.getEndOffset();
     final int index = getOffset();
     if( index >= began && index <= ended ) {
       setLink( link );
+    }
+  }
   private synchronized NodeVisitor getVisitor() {
     if( mVisitor == null ) {
       mVisitor = createVisitor();
+    }
     return mVisitor;
+  }
   protected NodeVisitor createVisitor() {
     return new NodeVisitor(
       new VisitHandler<>( Link.class, LinkVisitor.this::visit ) );
+  }
   private Link getLink() {
     return mLink;
+  }
   private void setLink( final Link link ) {
     mLink = link;
+  }
   public int getOffset() {
     return mOffset;
+  }
+}

A src/main/java/com/keenwrite/editors/markdown/MarkdownEditor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.editors.markdown;
 import com.keenwrite.constants.Constants;
 import com.keenwrite.editors.TextEditor;
 import com.keenwrite.editors.common.Caret;
 import com.keenwrite.events.TextEditorFocusEvent;
 import com.keenwrite.io.MediaType;
 import com.keenwrite.preferences.LocaleProperty;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.processors.markdown.extensions.CaretExtension;
 import javafx.beans.binding.Bindings;
 import javafx.beans.property.*;
 import javafx.beans.value.ChangeListener;
 import javafx.event.Event;
 import javafx.scene.Node;
 import javafx.scene.control.IndexRange;
 import javafx.scene.input.KeyEvent;
 import javafx.scene.layout.BorderPane;
 import org.fxmisc.flowless.VirtualizedScrollPane;
 import org.fxmisc.richtext.StyleClassedTextArea;
 import org.fxmisc.richtext.model.StyleSpans;
 import org.fxmisc.undo.UndoManager;
 import org.fxmisc.wellbehaved.event.EventPattern;
 import org.fxmisc.wellbehaved.event.Nodes;
 import java.io.File;
 import java.nio.charset.Charset;
 import java.text.BreakIterator;
 import java.text.MessageFormat;
 import java.util.*;
 import java.util.function.Consumer;
 import java.util.function.Supplier;
 import java.util.regex.Pattern;
 import static com.keenwrite.MainApp.keyDown;
 import static com.keenwrite.constants.Constants.*;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.io.MediaType.TEXT_MARKDOWN;
 import static com.keenwrite.io.MediaType.TEXT_R_MARKDOWN;
 import static com.keenwrite.preferences.AppKeys.*;
 import static java.lang.Character.isWhitespace;
 import static java.lang.String.format;
 import static java.util.Collections.singletonList;
 import static javafx.application.Platform.runLater;
 import static javafx.scene.control.ScrollPane.ScrollBarPolicy.ALWAYS;
 import static javafx.scene.input.KeyCode.*;
 import static javafx.scene.input.KeyCombination.*;
 import static org.apache.commons.lang3.StringUtils.stripEnd;
 import static org.apache.commons.lang3.StringUtils.stripStart;
 import static org.fxmisc.richtext.Caret.CaretVisibility.ON;
 import static org.fxmisc.richtext.model.StyleSpans.singleton;
 import static org.fxmisc.wellbehaved.event.EventPattern.keyPressed;
 import static org.fxmisc.wellbehaved.event.InputMap.consume;
 /**
  * Responsible for editing Markdown documents.
  */
 public final class MarkdownEditor extends BorderPane implements TextEditor {
   /**
    * Regular expression that matches the type of markup block. This is used
    * when Enter is pressed to continue the block environment.
    */
   private static final Pattern PATTERN_AUTO_INDENT = Pattern.compile(
     "(\\s*[*+-]\\s+|\\s*[0-9]+\\.\\s+|\\s+)(.*)" );
   private final Workspace mWorkspace;
   /**
    * The text editor.
    */
   private final StyleClassedTextArea mTextArea =
     new StyleClassedTextArea( false );
   /**
    * Wraps the text editor in scrollbars.
    */
   private final VirtualizedScrollPane<StyleClassedTextArea> mScrollPane =
     new VirtualizedScrollPane<>( mTextArea );
   /**
    * Tracks where the caret is located in this document. This offers observable
    * properties for caret position changes.
    */
   private final Caret mCaret = createCaret( mTextArea );
   /**
    * File being edited by this editor instance.
    */
   private File mFile;
   /**
    * Set to {@code true} upon text or caret position changes. Value is {@code
    * false} by default.
    */
   private final BooleanProperty mDirty = new SimpleBooleanProperty();
   /**
    * Opened file's character encoding, or {@link Constants#DEFAULT_CHARSET} if
    * either no encoding could be determined or this is a new (empty) file.
    */
   private final Charset mEncoding;
   /**
    * Tracks whether the in-memory definitions have changed with respect to the
    * persisted definitions.
    */
   private final BooleanProperty mModified = new SimpleBooleanProperty();
   public MarkdownEditor( final File file, final Workspace workspace ) {
     mEncoding = open( mFile = file );
     mWorkspace = workspace;
     initTextArea( mTextArea );
     initStyle( mTextArea );
     initScrollPane( mScrollPane );
     initHotKeys();
     initUndoManager();
+  }
   private void initTextArea( final StyleClassedTextArea textArea ) {
     textArea.setShowCaret( ON );
     textArea.setWrapText( true );
     textArea.requestFollowCaret();
     textArea.moveTo( 0 );
     textArea.textProperty().addListener( ( c, o, n ) -> {
       // Fire, regardless of whether the caret position has changed.
       mDirty.set( false );
       // Prevent the subsequent caret position change from raising dirty bits.
       mDirty.set( true );
     } );
     textArea.caretPositionProperty().addListener( ( c, o, n ) -> {
       // Fire when the caret position has changed and the text has not.
       mDirty.set( true );
       mDirty.set( false );
     } );
     textArea.focusedProperty().addListener( ( c, o, n ) -> {
       if( n != null && n ) {
         TextEditorFocusEvent.fire( this );
+      }
     } );
+  }
   private void initStyle( final StyleClassedTextArea textArea ) {
     textArea.getStyleClass().add( "markdown" );
     final var stylesheets = textArea.getStylesheets();
     stylesheets.add( getStylesheetPath( getLocale() ) );
     localeProperty().addListener( ( c, o, n ) -> {
       if( n != null ) {
         stylesheets.clear();
         stylesheets.add( getStylesheetPath( getLocale() ) );
+      }
     } );
     fontNameProperty().addListener(
       ( c, o, n ) ->
         setFont( mTextArea, getFontName(), getFontSize() )
     );
     fontSizeProperty().addListener(
       ( c, o, n ) ->
         setFont( mTextArea, getFontName(), getFontSize() )
     );
     setFont( mTextArea, getFontName(), getFontSize() );
+  }
   private void initScrollPane(
     final VirtualizedScrollPane<StyleClassedTextArea> scrollpane ) {
     scrollpane.setVbarPolicy( ALWAYS );
     setCenter( scrollpane );
+  }
   private void initHotKeys() {
     addEventListener( keyPressed( ENTER ), this::onEnterPressed );
     addEventListener( keyPressed( X, CONTROL_DOWN ), this::cut );
     addEventListener( keyPressed( TAB ), this::tab );
     addEventListener( keyPressed( TAB, SHIFT_DOWN ), this::untab );
+  }
   private void initUndoManager() {
     final var undoManager = getUndoManager();
     final var markedPosition = undoManager.atMarkedPositionProperty();
     undoManager.forgetHistory();
     undoManager.mark();
     mModified.bind( Bindings.not( markedPosition ) );
+  }
   @Override
   public void moveTo( final int offset ) {
     assert 0 <= offset && offset <= mTextArea.getLength();
     mTextArea.moveTo( offset );
     mTextArea.requestFollowCaret();
+  }
   /**
    * Delegate the focus request to the text area itself.
    */
   @Override
   public void requestFocus() {
     mTextArea.requestFocus();
+  }
   @Override
   public void setText( final String text ) {
     mTextArea.clear();
     mTextArea.appendText( text );
     mTextArea.getUndoManager().mark();
+  }
   @Override
   public String getText() {
     return mTextArea.getText();
+  }
   @Override
   public Charset getEncoding() {
     return mEncoding;
+  }
   @Override
   public File getFile() {
     return mFile;
+  }
   @Override
   public void rename( final File file ) {
     mFile = file;
+  }
   @Override
   public void undo() {
     final var manager = getUndoManager();
     xxdo( manager::isUndoAvailable, manager::undo, "Main.status.error.undo" );
+  }
   @Override
   public void redo() {
     final var manager = getUndoManager();
     xxdo( manager::isRedoAvailable, manager::redo, "Main.status.error.redo" );
+  }
   /**
    * Performs an undo or redo action, if possible, otherwise displays an error
    * message to the user.
+   *
    * @param ready  Answers whether the action can be executed.
    * @param action The action to execute.
    * @param key    The informational message key having a value to display if
    *               the {@link Supplier} is not ready.
    */
   private void xxdo(
     final Supplier<Boolean> ready, final Runnable action, final String key ) {
     if( ready.get() ) {
       action.run();
+    }
     else {
       clue( key );
+    }
+  }
   @Override
   public void cut() {
     final var selected = mTextArea.getSelectedText();
     // Emulate selecting the current line by firing Home then Shift+Down Arrow.
     if( selected == null || selected.isEmpty() ) {
       // Note: mTextArea.selectLine() does not select empty lines.
       mTextArea.fireEvent( keyDown( HOME, false ) );
       mTextArea.fireEvent( keyDown( DOWN, true ) );
+    }
     mTextArea.cut();
+  }
   @Override
   public void copy() {
     mTextArea.copy();
+  }
   @Override
   public void paste() {
     mTextArea.paste();
+  }
   @Override
   public void selectAll() {
     mTextArea.selectAll();
+  }
   @Override
   public void bold() {
     enwrap( "**" );
+  }
   @Override
   public void italic() {
     enwrap( "*" );
+  }
   @Override
   public void monospace() {
     enwrap( "`" );
+  }
   @Override
   public void superscript() {
     enwrap( "^" );
+  }
   @Override
   public void subscript() {
     enwrap( "~" );
+  }
   @Override
   public void strikethrough() {
     enwrap( "~~" );
+  }
   @Override
   public void blockquote() {
     block( "> " );
+  }
   @Override
   public void code() {
     enwrap( "`" );
+  }
   @Override
   public void fencedCodeBlock() {
     enwrap( "\n\n```\n", "\n```\n\n" );
+  }
   @Override
   public void heading( final int level ) {
     final var hashes = new String( new char[ level ] ).replace( "\0", "#" );
     block( format( "%s ", hashes ) );
+  }
   @Override
   public void unorderedList() {
     block( "* " );
+  }
   @Override
   public void orderedList() {
     block( "1. " );
+  }
   @Override
   public void horizontalRule() {
     block( format( "---%n%n" ) );
+  }
   @Override
   public Node getNode() {
     return this;
+  }
   @Override
   public ReadOnlyBooleanProperty modifiedProperty() {
     return mModified;
+  }
   @Override
   public void clearModifiedProperty() {
     getUndoManager().mark();
+  }
   @Override
   public VirtualizedScrollPane<StyleClassedTextArea> getScrollPane() {
     return mScrollPane;
+  }
   @Override
   public StyleClassedTextArea getTextArea() {
     return mTextArea;
+  }
   private final Map<String, IndexRange> mStyles = new HashMap<>();
   @Override
   public void stylize( final IndexRange range, final String style ) {
     final var began = range.getStart();
     final var ended = range.getEnd() + 1;
     assert 0 <= began && began <= ended;
     assert style != null;
     // TODO: Ensure spell check and find highlights can coexist.
 //    final var spans = mTextArea.getStyleSpans( range );
 //    System.out.println( "SPANS: " + spans );
 //    final var spans = mTextArea.getStyleSpans( range );
 //    mTextArea.setStyleSpans( began, merge( spans, range.getLength(), style
 //    ) );
 //    final var builder = new StyleSpansBuilder<Collection<String>>();
 //    builder.add( singleton( style ), range.getLength() + 1 );
 //    mTextArea.setStyleSpans( began, builder.create() );
 //    final var s = mTextArea.getStyleSpans( began, ended );
 //    System.out.println( "STYLES: " +s );
     mStyles.put( style, range );
     mTextArea.setStyleClass( began, ended, style );
     // Ensure that whenever the user interacts with the text that the found
     // word will have its highlighting removed. The handler removes itself.
     // This won't remove the highlighting if the caret position moves by mouse.
     final var handler = mTextArea.getOnKeyPressed();
     mTextArea.setOnKeyPressed( event -> {
       mTextArea.setOnKeyPressed( handler );
       unstylize( style );
     } );
     //mTextArea.setStyleSpans(began, ended, s);
+  }
   private static StyleSpans<Collection<String>> merge(
     StyleSpans<Collection<String>> spans, int len, String style ) {
     spans = spans.overlay(
       singleton( singletonList( style ), len ),
       ( bottomSpan, list ) -> {
         final List<String> l =
           new ArrayList<>( bottomSpan.size() + list.size() );
         l.addAll( bottomSpan );
         l.addAll( list );
         return l;
       } );
     return spans;
+  }
   @Override
   public void unstylize( final String style ) {
     final var indexes = mStyles.remove( style );
     if( indexes != null ) {
       mTextArea.clearStyle( indexes.getStart(), indexes.getEnd() + 1 );
+    }
+  }
   @Override
   public Caret getCaret() {
     return mCaret;
+  }
   /**
    * A {@link Caret} instance is not directly coupled ot the GUI because
    * document processing does not always require interactive status bar
    * updates. This can happen when processing from the command-line. However,
    * the processors need the {@link Caret} instance to inject the caret
    * position into the document. Making the {@link CaretExtension} optional
    * would require more effort than using a {@link Caret} model that is
    * decoupled from GUI widgets.
+   *
    * @param editor The text editor containing caret position information.
    * @return An instance of {@link Caret} that tracks the GUI caret position.
    */
   private Caret createCaret( final StyleClassedTextArea editor ) {
     return Caret
       .builder()
       .with( Caret.Mutator::setParagraph,
              () -> editor.currentParagraphProperty().getValue() )
       .with( Caret.Mutator::setParagraphs,
              () -> editor.getParagraphs().size() )
       .with( Caret.Mutator::setParaOffset,
              () -> editor.caretColumnProperty().getValue() )
       .with( Caret.Mutator::setTextOffset,
              () -> editor.caretPositionProperty().getValue() )
       .with( Caret.Mutator::setTextLength,
              () -> editor.lengthProperty().getValue() )
       .build();
+  }
   /**
    * This method adds listeners to editor events.
+   *
    * @param <T>      The event type.
    * @param <U>      The consumer type for the given event type.
    * @param event    The event of interest.
    * @param consumer The method to call when the event happens.
    */
   public <T extends Event, U extends T> void addEventListener(
     final EventPattern<? super T, ? extends U> event,
     final Consumer<? super U> consumer ) {
     Nodes.addInputMap( mTextArea, consume( event, consumer ) );
+  }
   private void onEnterPressed( final KeyEvent ignored ) {
     final var currentLine = getCaretParagraph();
     final var matcher = PATTERN_AUTO_INDENT.matcher( currentLine );
     // By default, insert a new line by itself.
     String newText = NEWLINE;
     // If the pattern was matched then determine what block type to continue.
     if( matcher.matches() ) {
       if( matcher.group( 2 ).isEmpty() ) {
         final var pos = mTextArea.getCaretPosition();
         mTextArea.selectRange( pos - currentLine.length(), pos );
+      }
       else {
         // Indent the new line with the same whitespace characters and
         // list markers as current line. This ensures that the indentation
         // is propagated.
         newText = newText.concat( matcher.group( 1 ) );
+      }
+    }
     mTextArea.replaceSelection( newText );
     mTextArea.requestFollowCaret();
+  }
   private void cut( final KeyEvent event ) {
     cut();
+  }
   private void tab( final KeyEvent event ) {
     final var range = mTextArea.selectionProperty().getValue();
     final var sb = new StringBuilder( 1024 );
     if( range.getLength() > 0 ) {
       final var selection = mTextArea.getSelectedText();
       selection.lines().forEach(
         l -> sb.append( "\t" ).append( l ).append( NEWLINE )
       );
+    }
     else {
       sb.append( "\t" );
+    }
     mTextArea.replaceSelection( sb.toString() );
+  }
   private void untab( final KeyEvent event ) {
     final var range = mTextArea.selectionProperty().getValue();
     if( range.getLength() > 0 ) {
       final var selection = mTextArea.getSelectedText();
       final var sb = new StringBuilder( selection.length() );
       selection.lines().forEach(
         l -> sb.append( l.startsWith( "\t" ) ? l.substring( 1 ) : l )
                .append( NEWLINE )
       );
       mTextArea.replaceSelection( sb.toString() );
+    }
     else {
       final var p = getCaretParagraph();
       if( p.startsWith( "\t" ) ) {
         mTextArea.selectParagraph();
         mTextArea.replaceSelection( p.substring( 1 ) );
+      }
+    }
+  }
   /**
    * Observers may listen for changes to the property returned from this method
    * to receive notifications when either the text or caret have changed. This
    * should not be used to track whether the text has been modified.
    */
   public void addDirtyListener( ChangeListener<Boolean> listener ) {
     mDirty.addListener( listener );
+  }
   /**
    * Surrounds the selected text or word under the caret in Markdown markup.
+   *
    * @param token The beginning and ending token for enclosing the text.
    */
   private void enwrap( final String token ) {
     enwrap( token, token );
+  }
   /**
    * Surrounds the selected text or word under the caret in Markdown markup.
+   *
    * @param began The beginning token for enclosing the text.
    * @param ended The ending token for enclosing the text.
    */
   private void enwrap( final String began, String ended ) {
     // Ensure selected text takes precedence over the word at caret position.
     final var selected = mTextArea.selectionProperty().getValue();
     final var range = selected.getLength() == 0
       ? getCaretWord()
       : selected;
     String text = mTextArea.getText( range );
     int length = range.getLength();
     text = stripStart( text, null );
     final int beganIndex = range.getStart() + length - text.length();
     length = text.length();
     text = stripEnd( text, null );
     final int endedIndex = range.getEnd() - (length - text.length());
     mTextArea.replaceText( beganIndex, endedIndex, began + text + ended );
+  }
   /**
    * Inserts the given block-level markup at the current caret position
    * within the document. This will prepend two blank lines to ensure that
    * the block element begins at the start of a new line.
+   *
    * @param markup The text to insert at the caret.
    */
   private void block( final String markup ) {
     final int pos = mTextArea.getCaretPosition();
     mTextArea.insertText( pos, format( "%n%n%s", markup ) );
+  }
   /**
    * Returns the caret position within the current paragraph.
+   *
    * @return A value from 0 to the length of the current paragraph.
    */
   private int getCaretColumn() {
     return mTextArea.getCaretColumn();
+  }
   @Override
   public IndexRange getCaretWord() {
     final var paragraph = getCaretParagraph()
       .replaceAll( "---", "   " )
       .replaceAll( "--", "  " )
       .replaceAll( "[\\[\\]{}()]", " " );
     final var length = paragraph.length();
     final var column = getCaretColumn();
     var began = column;
     var ended = column;
     while( began > 0 && !isWhitespace( paragraph.charAt( began - 1 ) ) ) {
       began--;
+    }
     while( ended < length && !isWhitespace( paragraph.charAt( ended ) ) ) {
       ended++;
+    }
     final var iterator = BreakIterator.getWordInstance();
     iterator.setText( paragraph );
     while( began < length && iterator.isBoundary( began + 1 ) ) {
       began++;
+    }
     while( ended > 0 && iterator.isBoundary( ended - 1 ) ) {
       ended--;
+    }
     final var offset = getCaretDocumentOffset( column );
     return IndexRange.normalize( began + offset, ended + offset );
+  }
   private int getCaretDocumentOffset( final int column ) {
     return mTextArea.getCaretPosition() - column;
+  }
   /**
    * Returns the index of the paragraph where the caret resides.
+   *
    * @return A number greater than or equal to 0.
    */
   private int getCurrentParagraph() {
     return mTextArea.getCurrentParagraph();
+  }
   /**
    * Returns the text for the paragraph that contains the caret.
+   *
    * @return A non-null string, possibly empty.
    */
   private String getCaretParagraph() {
     return getText( getCurrentParagraph() );
+  }
   @Override
   public String getText( final int paragraph ) {
     return mTextArea.getText( paragraph );
+  }
   @Override
   public String getText( final IndexRange indexes )
     throws IndexOutOfBoundsException {
     return mTextArea.getText( indexes.getStart(), indexes.getEnd() );
+  }
   @Override
   public void replaceText( final IndexRange indexes, final String s ) {
     mTextArea.replaceText( indexes, s );
+  }
   private UndoManager<?> getUndoManager() {
     return mTextArea.getUndoManager();
+  }
   /**
    * Returns the path to a {@link Locale}-specific stylesheet.
+   *
    * @return A non-null string to inject into the HTML document head.
    */
   private static String getStylesheetPath( final Locale locale ) {
     return MessageFormat.format(
       sSettings.getSetting( STYLESHEET_MARKDOWN_LOCALE, "" ),
       locale.getLanguage(),
       locale.getScript(),
       locale.getCountry()
     );
+  }
   private Locale getLocale() {
     return localeProperty().toLocale();
+  }
   private LocaleProperty localeProperty() {
     return mWorkspace.localeProperty( KEY_LANGUAGE_LOCALE );
+  }
   /**
    * Sets the font family name and font size at the same time. When the
    * workspace is loaded, the default font values are changed, which results
    * in this method being called.
+   *
    * @param area   Change the font settings for this text area.
    * @param name   New font family name to apply.
    * @param points New font size to apply (in points, not pixels).
    */
   private void setFont(
     final StyleClassedTextArea area, final String name, final double points ) {
     runLater( () -> area.setStyle(
       format(
         "-fx-font-family:'%s';-fx-font-size:%spx;", name, toPixels( points )
+      )
     ) );
+  }
   private String getFontName() {
     return fontNameProperty().get();
+  }
   private StringProperty fontNameProperty() {
     return mWorkspace.stringProperty( KEY_UI_FONT_EDITOR_NAME );
+  }
   private double getFontSize() {
     return fontSizeProperty().get();
+  }
   private DoubleProperty fontSizeProperty() {
     return mWorkspace.doubleProperty( KEY_UI_FONT_EDITOR_SIZE );
+  }
   /**
    * Answers whether the given resource is of compatible {@link MediaType}s.
+   *
    * @param mediaType The {@link MediaType} to compare.
    * @return {@code true} if the given {@link MediaType} is suitable for
    * editing with this type of editor.
    */
   @Override
   public boolean supports( final MediaType mediaType ) {
     return isMediaType( mediaType ) ||
       mediaType == TEXT_MARKDOWN ||
       mediaType == TEXT_R_MARKDOWN;
+  }
+}

A src/main/java/com/keenwrite/events/AppEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import static com.keenwrite.events.Bus.post;
 /**
  * Marker interface for all application events.
  */
 public interface AppEvent {
   /**
    * Submits this event to the {@link Bus}.
    */
   default void publish() {
     post( this );
+  }
+}

A src/main/java/com/keenwrite/events/Bus.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import org.greenrobot.eventbus.EventBus;
 /**
  * Responsible for delegating interactions to the event bus library. This
  * class decouples the rest of the application from a particular event bus
  * implementation.
  */
 public class Bus {
   private static final EventBus sEventBus = EventBus
     .builder().logNoSubscriberMessages( false ).installDefaultEventBus();
   public static <Subscriber> void register( final Subscriber subscriber ) {
     sEventBus.register( subscriber );
+  }
   public static <Subscriber> void unregister( final Subscriber subscriber ) {
     sEventBus.unregister( subscriber );
+  }
   public static <Event> void post( final Event event ) {
     sEventBus.post( event );
+  }
+}

A src/main/java/com/keenwrite/events/CaretMovedEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import com.keenwrite.editors.common.Caret;
 /**
  * Responsible for notifying when the caret has moved, which includes giving
  * focus to a different editor.
  */
 public class CaretMovedEvent implements AppEvent {
   private final Caret mCaret;
   private CaretMovedEvent( final Caret caret ) {
     assert caret != null;
     mCaret = caret;
+  }
   public static void fire( final Caret caret ) {
     new CaretMovedEvent( caret ).publish();
+  }
   public Caret getCaret() {
     return mCaret;
+  }
+}

A src/main/java/com/keenwrite/events/CaretNavigationEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import com.keenwrite.ui.outline.DocumentOutline;
 /**
  * Collates information about a caret event, which is typically triggered when
  * the user double-clicks in the {@link DocumentOutline}. This is an imperative
  * event, meaning that the position of the caret will be changed after this
  * event is handled. As opposed to a {@link CaretMovedEvent}, which provides
  * information about the caret after it has been moved.
  */
 public class CaretNavigationEvent implements AppEvent {
   /**
    * Absolute document offset.
    */
   private final int mOffset;
   private CaretNavigationEvent( final int offset ) {
     mOffset = offset;
+  }
   /**
    * Publishes an event that requests moving the caret to the given offset.
+   *
    * @param offset Move the caret to this document offset.
    */
   public static void fire( final int offset ) {
     new CaretNavigationEvent( offset ).publish();
+  }
   public int getOffset() {
     return mOffset;
+  }
+}

A src/main/java/com/keenwrite/events/DocumentChangedEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 /**
  * Collates information about an HTML document that has changed.
  */
 public class DocumentChangedEvent implements AppEvent {
   private final String mText;
   /**
    * Hash document (as plain text) so subscribers are notified upon changes.
    */
   private static int sHash;
   /**
    * Creates an event with the new plain text document, having all variables
    * substituted and all markup removed.
+   *
    * @param text The document text that has changed since the last time this
    *             type of event was fired.
    */
   private DocumentChangedEvent( final String text ) {
     mText = text;
+  }
   /**
    * When the given document may have changed. This will only fire a change
    * event if the given document has changed from the last time this
    * event was fired. The document is first converted to plain text before
    * the comparison is made.
+   *
    * @param html The document that may have changed.
    */
   public static void fire( final String html ) {
     // Hashing the document text ignores caret position changes.
     final var hash = html.hashCode();
     if( hash != sHash ) {
       sHash = hash;
       new DocumentChangedEvent( html ).publish();
+    }
+  }
   /**
    * Returns the text that has changed.
+   *
    * @return The new document text.
    */
   public String getDocument() {
     return mText;
+  }
   /**
    * Returns the document.
+   *
    * @return The value from {@link #getDocument()}.
    */
   @Override
   public String toString() {
     return getDocument();
+  }
+}

A src/main/java/com/keenwrite/events/ExportFailedEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 /**
  * Responsible for kicking off an alert message when exporting (e.g., to PDF)
  * fails. This can happen when the executable to typeset the document cannot
  * be found.
  */
 public class ExportFailedEvent implements AppEvent {
   public static void fire() {
     new ExportFailedEvent().publish();
+  }
+}

A src/main/java/com/keenwrite/events/FileOpenEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import java.net.URI;
 /**
  * Collates information about a file requested to be opened. This can be called
  * when the user clicks a hyperlink in HTML preview panel.
  */
 public class FileOpenEvent implements AppEvent {
   private final URI mUri;
   private FileOpenEvent( final URI uri ) {
     assert uri != null;
     mUri = uri;
+  }
   /**
    * Fires a new file open event using the given {@link URI} instance.
+   *
    * @param uri The instance of {@link URI} to open as a file in a text editor.
    */
   public static void fire( final URI uri ) {
     new FileOpenEvent( uri ).publish();
+  }
   /**
    * Returns the requested file name to be opened.
+   *
    * @return A file reference that can be opened in a text editor.
    */
   public URI getUri() {
     return mUri;
+  }
+}

A src/main/java/com/keenwrite/events/FocusEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 /**
  * Collates information about an object that has gained focus. This is typically
  * used by text resource editors (such as text editors and definition editors).
  */
 public class FocusEvent<T> implements AppEvent {
   private final T mNode;
   protected FocusEvent( final T node ) {
     mNode = node;
+  }
   /**
    * This method is used to help update the UI whenever a component has gained
    * input focus.
+   *
    * @return The object that has gained focus.
    */
   public T get() {
     return mNode;
+  }
+}

A src/main/java/com/keenwrite/events/HyperlinkOpenEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import java.io.IOException;
 import java.net.URI;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Collates information about a URL requested to be opened.
  */
 public class HyperlinkOpenEvent implements AppEvent {
   private final URI mUri;
   private HyperlinkOpenEvent( final URI uri ) {
     mUri = uri;
+  }
   /**
    * Requests to open the default browser at the given location.
+   *
    * @param uri The location to open.
    */
   public static void fire( final URI uri )
     throws IOException {
     new HyperlinkOpenEvent( uri ).publish();
+  }
   /**
    * Requests to open the default browser at the given location.
+   *
    * @param uri The location to open.
    */
   public static void fire( final String uri ) {
     try {
       fire( new URI( uri ) );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   /**
    * Returns the requested resource to be opened.
+   *
    * @return A reference that can be opened in a web browser.
    */
   public URI getUri() {
     return mUri;
+  }
+}

A src/main/java/com/keenwrite/events/InsertDefinitionEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import com.keenwrite.editors.definition.DefinitionTreeItem;
 /**
  * Collates information about a request to insert a reference to a
  * definition value into the active document.
  */
 public class InsertDefinitionEvent<T> implements AppEvent {
   private final DefinitionTreeItem<T> mLeaf;
   private InsertDefinitionEvent( final DefinitionTreeItem<T> leaf ) {
     mLeaf = leaf;
+  }
   public static <T> void fire( final DefinitionTreeItem<T> leaf ) {
     assert leaf != null;
     assert leaf.isLeaf();
     new InsertDefinitionEvent<>( leaf ).publish();
+  }
   /**
    * Returns the {@link DefinitionTreeItem} that is to be inserted into the
    * active document.
+   *
    * @return The item to insert (as a variable).
    */
   public DefinitionTreeItem<T> getLeaf() {
     return mLeaf;
+  }
+}

A src/main/java/com/keenwrite/events/ParseHeadingEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import com.keenwrite.processors.Processor;
 /**
  * Collates information about a document heading that has been parsed, after
  * all pertinent {@link Processor}s applied.
  */
 public class ParseHeadingEvent implements AppEvent {
   private static final int NEW_OUTLINE_LEVEL = 0;
   /**
    * The heading text, which may be {@code null} upon creating a new outline.
    */
   private final String mText;
   /**
    * The heading level, which will be set to {@link #NEW_OUTLINE_LEVEL} if this
    * event indicates that the existing outline should be cleared anew.
    */
   private final int mLevel;
   /**
    * Offset into the text where the heading is found.
    */
   private final int mOffset;
   private ParseHeadingEvent(
     final int level, final String text, final int offset ) {
     mText = text;
     mLevel = level;
     mOffset = offset;
+  }
   /**
    * Call to indicate a new outline is to be created.
    */
   public static void fireNewOutlineEvent() {
     new ParseHeadingEvent( NEW_OUTLINE_LEVEL, "Document", 0 ).publish();
+  }
   /**
    * Call to indicate that a new heading must be added to the document outline.
+   *
    * @param text   The heading text (parsed and processed).
    * @param level  A value between 1 and 6.
    * @param offset Absolute offset into document where heading is found.
    */
   public static void fire(
     final int level, final String text, final int offset ) {
     assert text != null;
     assert 1 <= level && level <= 6;
     assert 0 <= offset;
     new ParseHeadingEvent( level, text, offset ).publish();
+  }
   public boolean isNewOutline() {
     return getLevel() == NEW_OUTLINE_LEVEL;
+  }
   public int getLevel() {
     return mLevel;
+  }
   /**
    * Returns the text description for the heading.
+   *
    * @return The post-parsed and processed heading text from the document.
    */
   public String getText() {
     return mText;
+  }
   /**
    * Returns an offset into the document where the heading is found.
+   *
    * @return A zero-based document offset.
    */
   public int getOffset() {
     return mOffset;
+  }
   @Override
   public String toString() {
     return getText();
+  }
+}

A src/main/java/com/keenwrite/events/ScrollLockEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import static java.awt.Toolkit.getDefaultToolkit;
 import static java.awt.event.KeyEvent.VK_SCROLL_LOCK;
 /**
  * Collates information about the scroll lock status.
  */
 public class ScrollLockEvent implements AppEvent {
   private final boolean mLocked;
   private ScrollLockEvent( final boolean locked ) {
     mLocked = locked;
+  }
   /**
    * Fires a scroll lock event provided that the scroll lock key is in the
    * off state.
+   *
    * @param locked The new locked status.
    */
   public static void fireScrollLockEvent( final boolean locked ) {
     // If the scroll lock key is off, allow the status to change.
     if( !getScrollLockKeyStatus() ) {
       fire( locked );
+    }
+  }
   /**
    * Fires a scroll lock event based on the current status of the scroll
    * lock key.
    */
   public static void fireScrollLockEvent() {
     fire( getScrollLockKeyStatus() );
+  }
   /**
    * Answers whether the synchronized scrolling should be locked in place
    * (i.e., prevent sync scrolling).
+   *
    * @return {@code true} when the user has locked the scrollbar position.
    */
   public boolean isLocked() {
     return mLocked;
+  }
   private static void fire( final boolean locked ) {
     new ScrollLockEvent( locked ).publish();
+  }
   /**
    * Returns the state of the scroll lock key.
+   *
    * @return {@code true} when the scroll lock key is in the on state.
    */
   private static boolean getScrollLockKeyStatus() {
     return getDefaultToolkit().getLockingKeyState( VK_SCROLL_LOCK );
+  }
+}

A src/main/java/com/keenwrite/events/StatusEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import com.keenwrite.AppCommands;
 import java.util.List;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.Constants.NEWLINE;
 import static com.keenwrite.constants.Constants.STATUS_BAR_OK;
 import static java.lang.String.format;
 import static java.lang.String.join;
 import static java.util.Arrays.stream;
 /**
  * Collates information about an application issue. The issues can be
  * exceptions, state problems, parsing errors, and so forth.
  */
 public final class StatusEvent implements AppEvent {
   /**
    * Reference a class in the top-level package that doesn't depend on any
    * JavaFX APIs.
    */
   private static final String PACKAGE_NAME = AppCommands.class.getPackageName();
   private static final String ENGLISHIFY =
     "(?<=[a-z])(?=[A-Z])|(?<=[A-Z])(?=[A-Z][a-z])";
   /**
    * Detailed information about a problem.
    */
   private final String mMessage;
   /**
    * Provides stack trace information that isolates the cause.
    */
   private final Throwable mProblem;
   /**
    * Constructs a new event that contains a problem description to help the
    * user resolve an issue encountered while using the application.
+   *
    * @param message The human-readable message, typically displayed on-screen.
    */
   public StatusEvent( final String message ) {
     this( message, null );
+  }
   public StatusEvent( final Throwable problem ) {
     this( "", problem );
+  }
   /**
    * @param message The human-readable message text.
    * @param problem May be {@code null} if no exception was thrown.
    */
   public StatusEvent( final String message, final Throwable problem ) {
     assert message != null;
     mMessage = message;
     mProblem = problem;
+  }
   /**
    * Returns the stack trace information for the issue encountered. This is
    * optional because usually a status message isn't an application error.
+   *
    * @return Optional stack trace to pinpoint the problem area in the code.
    */
   public String getProblem() {
     // 256 is arbitrary; stack traces shouldn't be much larger.
     final var sb = new StringBuilder( 256 );
     final var trace = mProblem;
     if( trace != null ) {
       stream( trace.getStackTrace() )
         .takeWhile( StatusEvent::filter )
         .limit( 10 )
         .toList()
         .forEach( e -> sb.append( e.toString() ).append( NEWLINE ) );
+    }
     return sb.toString();
+  }
   @Override
   public String toString() {
     // Not exactly sure how the message can be null, but it happened once!
     final var message = mMessage == null ? "UNKNOWN" : mMessage;
     return format( "%s%s%s",
                    message,
                    message.isBlank() ? "" : " ",
                    mProblem == null ? "" : toEnglish( mProblem ) );
+  }
   /**
    * Returns {@code true} to allow the {@link StackTraceElement} to pass
    * through the filter.
+   *
    * @param e The element to check against the filter.
    */
   private static boolean filter( final StackTraceElement e ) {
     final var clazz = e.getClassName();
     return clazz.contains( PACKAGE_NAME ) ||
       clazz.contains( "org.renjin." ) ||
       clazz.contains( "sun." ) ||
       clazz.contains( "flexmark." ) ||
       clazz.contains( "java." );
+  }
   /**
    * Separates the exception class name from TitleCase into lowercase,
    * space-separated words. This makes the exception look a little more like
    * English. Any {@link RuntimeException} instances passed into this method
    * will have the cause extracted, if possible.
+   *
    * @param problem The exception that triggered the status event change.
    * @return A human-readable message with the exception name and the
    * exception's message.
    */
   private static String toEnglish( Throwable problem ) {
     assert problem != null;
     // Subclasses of RuntimeException must be subject to Englishification.
     if( problem.getClass().equals( RuntimeException.class ) ) {
       final var cause = problem.getCause();
       return cause == null ? problem.getMessage() : cause.getMessage();
+    }
     final var className = problem.getClass().getSimpleName();
     final var words = join( " ", className.split( ENGLISHIFY ) );
     return format( "(%s: %s)", words.toLowerCase(), problem.getMessage() );
+  }
   /**
    * Returns the message used to construct the event.
+   *
    * @return The message for this event.
    */
   public String getMessage() {
     return mMessage;
+  }
   /**
    * Resets the status bar to a default message. Indicates that there are no
    * issues to bring to the user's attention.
    */
   public static void clue() {
     fire( get( STATUS_BAR_OK, "OK" ) );
+  }
   /**
    * Notifies listeners of a series of messages. This is useful when providing
    * users feedback of how third-party executables have failed.
+   *
    * @param messages The lines of text to display.
    */
   public static void clue( final List<String> messages ) {
     messages.forEach( StatusEvent::fire );
+  }
   /**
    * Notifies listeners of an error.
+   *
    * @param key The message bundle key to look up.
    * @param t   The exception that caused the error.
    */
   public static void clue( final String key, final Throwable t ) {
     fire( get( key ), t );
+  }
   /**
    * Notifies listeners of a custom message.
+   *
    * @param key  The property key having a value to populate with arguments.
    * @param args The placeholder values to substitute into the key's value.
    */
   public static void clue( final String key, final Object... args ) {
     fire( get( key, args ) );
+  }
   /**
    * Notifies listeners of a custom message.
+   *
    * @param ex   The exception that warranted calling this method.
    * @param fmt  The string format specifier.
    * @param args The arguments to weave into the format specifier.
    */
   public static void clue(
     final Exception ex,
     final String fmt,
     final Object... args ) {
     final var msg = format( fmt, args );
     clue( msg, ex );
+  }
   /**
    * Notifies listeners of an exception occurs that warrants the user's
    * attention.
+   *
    * @param problem The exception with a message to display to the user.
    */
   public static void clue( final Throwable problem ) {
     fire( problem );
+  }
   private static void fire( final String message ) {
     new StatusEvent( message ).publish();
+  }
   private static void fire( final Throwable problem ) {
     new StatusEvent( problem ).publish();
+  }
   private static void fire(
     final String message, final Throwable problem ) {
     new StatusEvent( message, problem ).publish();
+  }
+}

A src/main/java/com/keenwrite/events/TextDefinitionFocusEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import com.keenwrite.editors.TextDefinition;
 public class TextDefinitionFocusEvent extends FocusEvent<TextDefinition> {
   protected TextDefinitionFocusEvent( final TextDefinition editor ) {
     super( editor );
+  }
   /**
    * When the {@link TextDefinition} editor has focus, fire an event so that
    * subscribers may perform an action.
+   *
    * @param editor The instance of editor that has gained input focus.
    */
   public static void fire( final TextDefinition editor ) {
     new TextDefinitionFocusEvent( editor ).publish();
+  }
+}

A src/main/java/com/keenwrite/events/TextEditorFocusEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 import com.keenwrite.editors.TextEditor;
 /**
  * Collates information about the text editor that has gained focus.
  */
 public class TextEditorFocusEvent extends FocusEvent<TextEditor> {
   protected TextEditorFocusEvent( final TextEditor editor ) {
     super( editor );
+  }
   /**
    * When the {@link TextEditor} has focus, fire an event so that subscribers
    * may perform an action---such as parsing and rendering the contents.
+   *
    * @param editor The instance of editor that has gained input focus.
    */
   public static void fire( final TextEditor editor ) {
     new TextEditorFocusEvent( editor ).publish();
+  }
+}

A src/main/java/com/keenwrite/events/WordCountEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events;
 /**
  * Collates information about the word count changing.
  */
 public class WordCountEvent implements AppEvent {
   /**
    * Number of words in the document.
    */
   private final int mCount;
   private WordCountEvent( final int count ) {
     mCount = count;
+  }
   /**
    * Publishes an event that indicates the number of words in the document.
+   *
    * @param count The approximate number of words in the document.
    */
   public static void fire( final int count ) {
     new WordCountEvent( count ).publish();
+  }
   public int getCount() {
     return mCount;
+  }
+}

A src/main/java/com/keenwrite/events/spelling/LexiconEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events.spelling;
 import com.keenwrite.events.AppEvent;
 public abstract class LexiconEvent implements AppEvent {
+}

A src/main/java/com/keenwrite/events/spelling/LexiconLoadedEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events.spelling;
 import java.util.Map;
 /**
  * Collates information about the lexicon. Fired when the lexicon has been
  * fully loaded into memory.
  */
 public class LexiconLoadedEvent extends LexiconEvent {
   private final Map<String, Long> mLexicon;
   private LexiconLoadedEvent( final Map<String, Long> lexicon ) {
     mLexicon = lexicon;
+  }
   public static void fire( final Map<String, Long> lexicon ) {
     new LexiconLoadedEvent( lexicon ).publish();
+  }
   /**
    * Returns a word-frequency map used by the spell checking library.
+   *
    * @return The lexicon that was loaded.
    */
   public Map<String, Long> getLexicon() {
     return mLexicon;
+  }
+}

A src/main/java/com/keenwrite/events/workspace/WorkspaceEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events.workspace;
 import com.keenwrite.events.AppEvent;
 /**
  * Superclass of all events related to the workspace.
  */
 public abstract class WorkspaceEvent implements AppEvent {
+}

A src/main/java/com/keenwrite/events/workspace/WorkspaceLoadedEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.events.workspace;
 import com.keenwrite.preferences.Workspace;
 /**
  * Indicates that the {@link Workspace} has been loaded.
  */
 public class WorkspaceLoadedEvent extends WorkspaceEvent {
   private final Workspace mWorkspace;
   private WorkspaceLoadedEvent( final Workspace workspace ) {
     assert workspace != null;
     mWorkspace = workspace;
+  }
   /**
    * Publishes an event that indicates a new {@link Workspace} has been loaded.
    */
   public static void fire( final Workspace workspace ) {
     new WorkspaceLoadedEvent( workspace ).publish();
+  }
   /**
    * Returns a reference to the {@link Workspace} that was loaded.
+   *
    * @return The {@link Workspace} that has loaded user preferences.
    */
   public Workspace getWorkspace() {
     return mWorkspace;
+  }
+}

A src/main/java/com/keenwrite/exceptions/MissingFileException.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.exceptions;
 import java.io.FileNotFoundException;
 import static com.keenwrite.Messages.get;
 /**
  * Responsible for informing the user when a file cannot be found.
  * This avoids duplicating the error message prefix.
  */
 public final class MissingFileException extends FileNotFoundException {
   /**
    * Constructs a new {@link MissingFileException} using the given path.
+   *
    * @param uri The path to the file resource that could not be found.
    */
   public MissingFileException( final String uri ) {
     super( get( "Main.status.error.file.missing", uri ) );
+  }
+}

A src/main/java/com/keenwrite/heuristics/package-info.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 /**
  * This package contains classes to help with word count. In logographic,
  * or other non-alphabetic languages, word tokenization cannot rely on
  * spaces. Instead, we need to employ a more sophisticated approach using
  * natural language parsing (NLP).
  */
 package com.keenwrite.heuristics;

A src/main/java/com/keenwrite/io/CommandNotFoundException.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.io.File;
 import java.io.FileNotFoundException;
 /**
  * Indicates a command could not be found to run.
  */
 public class CommandNotFoundException extends FileNotFoundException {
   /**
    * Creates a new exception indicating that the given command could not be
    * found (or executed).
+   *
    * @param command The binary file's command name that could not be run.
    */
   public CommandNotFoundException( final String command ) {
     super( command );
+  }
   /**
    * Creates a new exception indicating that the given command could not be
    * found (or executed).
+   *
    * @param file The binary file's command name that could not be run.
    */
   public CommandNotFoundException( final File file ) {
     this( file.getAbsolutePath() );
+  }
+}

A src/main/java/com/keenwrite/io/FileEvent.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.io.File;
 import java.util.EventObject;
 /**
  * Responsible for indicating that a file has been modified by the file system.
  */
 public class FileEvent extends EventObject {
   /**
    * Constructs a new event that indicates the source of a file system event.
+   *
    * @param file The {@link File} that has succumbed to a file system event.
    */
   public FileEvent( final File file ) {
     super( file );
+  }
   /**
    * Returns the source as an instance of {@link File}.
+   *
    * @return The {@link File} being watched.
    */
   public File getFile() {
     return (File) getSource();
+  }
+}

A src/main/java/com/keenwrite/io/FileModifiedListener.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.util.EventListener;
 import java.util.function.Consumer;
 /**
  * Responsible for informing listeners when a file has been modified.
  */
 public interface FileModifiedListener
   extends EventListener, Consumer<FileEvent> {
+}

A src/main/java/com/keenwrite/io/FileType.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 /**
  * Represents different file type classifications. These are high-level mappings
  * that correspond to the list of glob patterns found within {@code
  * settings.properties}.
  */
 public enum FileType {
   ALL( "all" ),
   RMARKDOWN( "rmarkdown" ),
   RXML( "rxml" ),
   SOURCE( "source" ),
   DEFINITION( "definition" ),
   CSV( "csv" ),
   JSON( "json" ),
   TOML( "toml" ),
   YAML( "yaml" ),
   PROPERTIES( "properties" ),
   UNKNOWN( "unknown" );
   private final String mType;
   /**
    * Default constructor for enumerated file type.
+   *
    * @param type Human-readable name for the file type.
    */
   FileType( final String type ) {
     mType = type;
+  }
   /**
    * Returns the file type that corresponds to the given string.
+   *
    * @param type The string to compare against this enumeration of file types.
    * @return The corresponding File Type for the given string.
    * @throws IllegalArgumentException Type not found.
    */
   public static FileType from( final String type ) {
     for( final FileType fileType : FileType.values() ) {
       if( fileType.isType( type ) ) {
         return fileType;
+      }
+    }
     throw new IllegalArgumentException( type );
+  }
   /**
    * Answers whether this file type matches the given string, case-insensitive
    * comparison.
+   *
    * @param type Presumably a file name extension to check against.
    * @return true The given extension corresponds to this enumerated type.
    */
   public boolean isType( final String type ) {
     return getType().equalsIgnoreCase( type );
+  }
   /**
    * Returns the human-readable name for the file type.
+   *
    * @return A non-null instance.
    */
   private String getType() {
     return mType;
+  }
   /**
    * Returns the lowercase version of the file name extension.
+   *
    * @return The file name, in lower case.
    */
   @Override
   public String toString() {
     return getType();
+  }
+}

A src/main/java/com/keenwrite/io/FileWatchService.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import org.renjin.repackaged.guava.collect.BiMap;
 import org.renjin.repackaged.guava.collect.HashBiMap;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.nio.file.WatchKey;
 import java.nio.file.WatchService;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import static java.nio.file.FileSystems.getDefault;
 import static java.nio.file.StandardWatchEventKinds.ENTRY_MODIFY;
 import static java.util.Collections.newSetFromMap;
 /**
  * Responsible for watching when a file has been changed.
  */
 public class FileWatchService implements Runnable {
   /**
    * Set to {@code false} when {@link #stop()} is called.
    */
   private volatile boolean mRunning;
   /**
    * Contains the listeners to notify when a given file has changed.
    */
   private final Set<FileModifiedListener> mListeners =
     newSetFromMap( new ConcurrentHashMap<>() );
   private final WatchService mWatchService;
   private final BiMap<File, WatchKey> mWatched = HashBiMap.create();
   /**
    * Creates a new file system watch service with the given files to watch.
+   *
    * @param files The files to watch for file system events.
    */
   public FileWatchService( final File... files ) {
     mWatchService = createWatchService();
     try {
       for( final var file : files ) {
         register( file );
+      }
     } catch( final Exception ex ) {
       throw new RuntimeException( ex );
+    }
+  }
   /**
    * Runs the event handler until {@link #stop()} is called.
+   *
    * @throws RuntimeException There was an error watching for file events.
    */
   @Override
   public void run() {
     mRunning = true;
     while( mRunning ) {
       handleEvents();
+    }
+  }
   private void handleEvents() {
     try {
       final var watchKey = mWatchService.take();
       for( final var pollEvent : watchKey.pollEvents() ) {
         final var watchable = (Path) watchKey.watchable();
         final var context = (Path) pollEvent.context();
         final var file = watchable.resolve( context ).toFile();
         if( mWatched.containsKey( file ) ) {
           final var fileEvent = new FileEvent( file );
           for( final var listener : mListeners ) {
             listener.accept( fileEvent );
+          }
+        }
+      }
       if( !watchKey.reset() ) {
         unregister( watchKey );
+      }
     } catch( final Exception ex ) {
       throw new RuntimeException( ex );
+    }
+  }
   /**
    * Adds the given {@link File}'s containing directory to the watch list. When
    * the given {@link File} is modified, this service will receive a
    * notification that the containing directory has been modified, which will
    * then be filtered by file name.
    * <p>
    * This method is idempotent.
    * </p>
+   *
    * @param file The {@link File} to watch for modification events.
    * @return The {@link File}'s directory watch state.
    * @throws IOException              Could not register the directory.
    * @throws IllegalArgumentException The {@link File} has no parent directory.
    */
   public WatchKey register( final File file ) throws IOException {
     if( mWatched.containsKey( file ) ) {
       return mWatched.get( file );
+    }
     final var path = getParentDirectory( file );
     final var watchKey = path.register( mWatchService, ENTRY_MODIFY );
     return mWatched.put( file, watchKey );
+  }
   /**
    * Removes the given {@link File}'s containing directory from the watch list.
    * <p>
    * This method is idempotent.
    * </p>
+   *
    * @param file The {@link File} to no longer watch.
    * @throws IllegalArgumentException The {@link File} has no parent directory.
    */
   public void unregister( final File file ) {
     mWatched.remove( cancel( file ) );
+  }
   /**
    * Cancels watching the given file for file system changes.
+   *
    * @param file The {@link File} to watch for file events.
    * @return The given file, always.
    */
   private File cancel( final File file ) {
     final var watchKey = mWatched.get( file );
     if( watchKey != null ) {
       watchKey.cancel();
+    }
     return file;
+  }
   /**
    * Removes the given {@link WatchKey} from the registration map.
+   *
    * @param watchKey The {@link WatchKey} to remove from the map.
    */
   private void unregister( final WatchKey watchKey ) {
     unregister( mWatched.inverse().get( watchKey ) );
+  }
   /**
    * Adds a listener to be notified when a file under watch has been modified.
    * Listeners are backed by a set.
+   *
    * @param listener The {@link FileModifiedListener} to add to the list.
    * @return {@code true} if this set did not already contain listener.
    */
   public boolean addListener( final FileModifiedListener listener ) {
     return mListeners.add( listener );
+  }
   /**
    * Removes a listener from the notify list.
+   *
    * @param listener The {@link FileModifiedListener} to remove.
    */
   public void removeListener( final FileModifiedListener listener ) {
     mListeners.remove( listener );
+  }
   /**
    * Shuts down the file watch service and clears both watchers and listeners.
+   *
    * @throws IOException Could not close the watch service.
    */
   public void stop() throws IOException {
     mRunning = false;
     for( final var file : mWatched.keySet() ) {
       cancel( file );
+    }
     mWatched.clear();
     mListeners.clear();
     mWatchService.close();
+  }
   /**
    * Returns the directory containing the given {@link File} instance.
+   *
    * @param file The {@link File}'s containing directory to watch.
    * @return The {@link Path} to the {@link File}'s directory.
    * @throws IllegalArgumentException The {@link File} has no parent directory.
    */
   private Path getParentDirectory( final File file ) {
     assert file != null;
     assert !file.isDirectory();
     final var directory = file.getParentFile();
     if( directory == null ) {
       throw new IllegalArgumentException( file.getAbsolutePath() );
+    }
     return directory.toPath();
+  }
   private WatchService createWatchService() {
     try {
       return getDefault().newWatchService();
     } catch( final Exception ex ) {
       // Create a fallback that allows the class to be instantiated and used
       // without without preventing the application from launching.
       return new PollingWatchService();
+    }
+  }
+}

A src/main/java/com/keenwrite/io/MediaType.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.io.File;
 import java.io.IOException;
 import java.net.URL;
 import java.nio.file.Path;
 import static com.keenwrite.io.MediaType.TypeName.*;
 import static com.keenwrite.io.MediaTypeExtension.fromExtension;
 import static org.apache.commons.io.FilenameUtils.getExtension;
 /**
  * Defines various file formats and format contents.
+ *
  * @see
  * <a href="https://www.iana.org/assignments/media-types/media-types.xhtml">IANA
  * Media Types</a>
  */
 @SuppressWarnings( "SpellCheckingInspection" )
 public enum MediaType {
   APP_DOCUMENT_OUTLINE( APPLICATION, "x-document-outline" ),
   APP_DOCUMENT_STATISTICS( APPLICATION, "x-document-statistics" ),
   APP_FILE_MANAGER( APPLICATION, "x-file-manager" ),
   APP_ACAD( APPLICATION, "acad" ),
   APP_JAVA_OBJECT( APPLICATION, "x-java-serialized-object" ),
   APP_JAVA( APPLICATION, "java" ),
   APP_PS( APPLICATION, "postscript" ),
   APP_EPS( APPLICATION, "eps" ),
   APP_PDF( APPLICATION, "pdf" ),
   APP_ZIP( APPLICATION, "zip" ),
   /*
    * Standard font types.
    */
   FONT_OTF( "otf" ),
   FONT_TTF( "ttf" ),
   /*
    * Standard image types.
    */
   IMAGE_APNG( "apng" ),
   IMAGE_ACES( "aces" ),
   IMAGE_AVCI( "avci" ),
   IMAGE_AVCS( "avcs" ),
   IMAGE_BMP( "bmp" ),
   IMAGE_CGM( "cgm" ),
   IMAGE_DICOM_RLE( "dicom_rle" ),
   IMAGE_EMF( "emf" ),
   IMAGE_EXAMPLE( "example" ),
   IMAGE_FITS( "fits" ),
   IMAGE_G3FAX( "g3fax" ),
   IMAGE_GIF( "gif" ),
   IMAGE_HEIC( "heic" ),
   IMAGE_HEIF( "heif" ),
   IMAGE_HEJ2K( "hej2k" ),
   IMAGE_HSJ2( "hsj2" ),
   IMAGE_X_ICON( "x-icon" ),
   IMAGE_JLS( "jls" ),
   IMAGE_JP2( "jp2" ),
   IMAGE_JPEG( "jpeg" ),
   IMAGE_JPH( "jph" ),
   IMAGE_JPHC( "jphc" ),
   IMAGE_JPM( "jpm" ),
   IMAGE_JPX( "jpx" ),
   IMAGE_JXR( "jxr" ),
   IMAGE_JXRA( "jxrA" ),
   IMAGE_JXRS( "jxrS" ),
   IMAGE_JXS( "jxs" ),
   IMAGE_JXSC( "jxsc" ),
   IMAGE_JXSI( "jxsi" ),
   IMAGE_JXSS( "jxss" ),
   IMAGE_KTX( "ktx" ),
   IMAGE_KTX2( "ktx2" ),
   IMAGE_NAPLPS( "naplps" ),
   IMAGE_PNG( "png" ),
   IMAGE_PHOTOSHOP( "photoshop" ),
   IMAGE_SVG_XML( "svg+xml" ),
   IMAGE_T38( "t38" ),
   IMAGE_TIFF( "tiff" ),
   IMAGE_WEBP( "webp" ),
   IMAGE_WMF( "wmf" ),
   IMAGE_X_BITMAP( "x-xbitmap" ),
   IMAGE_X_PIXMAP( "x-xpixmap" ),
   /*
    * Standard audio types.
    */
   AUDIO_SIMPLE( AUDIO, "basic" ),
   AUDIO_MP3( AUDIO, "mp3" ),
   AUDIO_WAV( AUDIO, "x-wav" ),
   /*
    * Standard video types.
    */
   VIDEO_MNG( VIDEO, "x-mng" ),
   /*
    * Document types for editing or displaying documents, mix of standard and
    * application-specific. The order that these are declared reflect in the
    * ordinal value used during comparisons.
    */
   TEXT_YAML( TEXT, "yaml" ),
   TEXT_PLAIN( TEXT, "plain" ),
   TEXT_MARKDOWN( TEXT, "markdown" ),
   TEXT_R_MARKDOWN( TEXT, "R+markdown" ),
   TEXT_PROPERTIES( TEXT, "x-java-properties" ),
   TEXT_HTML( TEXT, "html" ),
   TEXT_XHTML( TEXT, "xhtml+xml" ),
   TEXT_XML( TEXT, "xml" ),
   /*
    * When all other lights go out.
    */
   UNDEFINED( TypeName.UNDEFINED, "undefined" );
   /**
    * The IANA-defined types.
    */
   public enum TypeName {
     APPLICATION,
     AUDIO,
     IMAGE,
     TEXT,
     UNDEFINED,
     VIDEO
+  }
   /**
    * The fully qualified IANA-defined media type.
    */
   private final String mMediaType;
   /**
    * The IANA-defined type name.
    */
   private final TypeName mTypeName;
   /**
    * The IANA-defined subtype name.
    */
   private final String mSubtype;
   /**
    * Constructs an instance using the default type name of "image".
+   *
    * @param subtype The image subtype name.
    */
   MediaType( final String subtype ) {
     this( IMAGE, subtype );
+  }
   /**
    * Constructs an instance using an IANA-defined type and subtype pair.
+   *
    * @param typeName The media type's type name.
    * @param subtype  The media type's subtype name.
    */
   MediaType( final TypeName typeName, final String subtype ) {
     mTypeName = typeName;
     mSubtype = subtype;
     mMediaType = typeName.toString().toLowerCase() + '/' + subtype;
+  }
   /**
    * Returns the {@link MediaType} associated with the given file.
+   *
    * @param file Has a file name that may contain an extension associated with
    *             a known {@link MediaType}.
    * @return {@link MediaType#UNDEFINED} if the extension has not been
    * assigned, otherwise the {@link MediaType} associated with this
    * {@link File}'s file name extension.
    */
   public static MediaType valueFrom( final File file ) {
     assert file != null;
     return fromFilename( file.getName() );
+  }
   /**
    * Returns the {@link MediaType} associated with the given file name.
+   *
    * @param filename The file name that may contain an extension associated
    *                 with a known {@link MediaType}.
    * @return {@link MediaType#UNDEFINED} if the extension has not been
    * assigned, otherwise the {@link MediaType} associated with this
    * {@link URL}'s file name extension.
    */
   public static MediaType fromFilename( final String filename ) {
     assert filename != null;
     return fromExtension( getExtension( filename ) );
+  }
   /**
    * Returns the {@link MediaType} associated with the path to a file.
+   *
    * @param path Has a file name that may contain an extension associated with
    *             a known {@link MediaType}.
    * @return {@link MediaType#UNDEFINED} if the extension has not been
    * assigned, otherwise the {@link MediaType} associated with this
    * {@link File}'s file name extension.
    */
   public static MediaType valueFrom( final Path path ) {
     assert path != null;
     return valueFrom( path.toFile() );
+  }
   /**
    * Determines the media type an IANA-defined, semi-colon-separated string.
    * This is often used after making an HTTP request to extract the type
    * and subtype from the content-type.
+   *
    * @param header The content-type header value, may be {@code null}.
    * @return The data type for the resource or {@link MediaType#UNDEFINED} if
    * unmapped.
    */
   public static MediaType valueFrom( String header ) {
     if( header == null || header.isBlank() ) {
       return UNDEFINED;
+    }
     // Trim off the character encoding.
     var i = header.indexOf( ';' );
     header = header.substring( 0, i == -1 ? header.length() : i );
     // Split the type and subtype.
     i = header.indexOf( '/' );
     i = i == -1 ? header.length() : i;
     final var type = header.substring( 0, i );
     final var subtype = header.substring( i + 1 );
     return valueFrom( type, subtype );
+  }
   /**
    * Returns the {@link MediaType} for the given type and subtype names.
+   *
    * @param type    The IANA-defined type name.
    * @param subtype The IANA-defined subtype name.
    * @return {@link MediaType#UNDEFINED} if there is no {@link MediaType} that
    * matches the given type and subtype names.
    */
   public static MediaType valueFrom(
     final String type, final String subtype ) {
     assert type != null;
     assert subtype != null;
     for( final var mediaType : values() ) {
       if( mediaType.equals( type, subtype ) ) {
         return mediaType;
+      }
+    }
     return UNDEFINED;
+  }
   /**
    * Answers whether the given type and subtype names equal this enumerated
    * value. This performs a case-insensitive comparison.
+   *
    * @param type    The type name to compare against this {@link MediaType}.
    * @param subtype The subtype name to compare against this {@link MediaType}.
    * @return {@code true} when the type and subtype name match.
    */
   public boolean equals( final String type, final String subtype ) {
     assert type != null;
     assert subtype != null;
     return mTypeName.name().equalsIgnoreCase( type ) &&
       mSubtype.equalsIgnoreCase( subtype );
+  }
   /**
    * Answers whether the given {@link TypeName} matches this type name.
+   *
    * @param typeName The {@link TypeName} to compare against the internal value.
    * @return {@code true} if the given value is the same IANA-defined type name.
    */
   @SuppressWarnings( "unused" )
   public boolean isType( final TypeName typeName ) {
     return mTypeName == typeName;
+  }
   /**
    * Answers whether this instance is a scalable vector graphic.
+   *
    * @return {@code true} if this instance represents an SVG object.
    */
   public boolean isSvg() {
     return equals( IMAGE_SVG_XML );
+  }
   public boolean isUndefined() {
     return equals( UNDEFINED );
+  }
   /**
    * Returns the IANA-defined subtype classification. Primarily used by
    * {@link MediaTypeExtension} to initialize associations where the subtype
    * name and the file name extension have a 1:1 mapping.
+   *
    * @return The IANA subtype value.
    */
   public String getSubtype() {
     return mSubtype;
+  }
   /**
    * Creates a temporary {@link File} that starts with the given prefix.
+   *
    * @param prefix    The file name begins with this string (empty is allowed).
    * @param directory The directory wherein the file is created.
    * @return The fully qualified path to the temporary file.
    * @throws IOException Could not create the temporary file.
    */
   public Path createTempFile(
     final String prefix,
     final Path directory ) throws IOException {
     return createTempFile( prefix, directory, false );
+  }
   /**
    * Creates a temporary {@link File} that starts with the given prefix.
+   *
    * @param prefix    The file name begins with this string (empty is allowed).
    * @param directory The directory wherein the file is created.
    * @param purge     Set to {@code true} to delete the file on exit.
    * @return The fully qualified path to the temporary file.
    * @throws IOException Could not create the temporary file.
    */
   public Path createTempFile(
     final String prefix,
     final Path directory,
     final boolean purge )
     throws IOException {
     assert prefix != null;
     final var suffix = '.' + MediaTypeExtension
       .valueFrom( this )
       .getExtension();
     final var file = File.createTempFile( prefix, suffix, directory.toFile() );
     if( purge ) {
       file.deleteOnExit();
+    }
     return file.toPath();
+  }
   /**
    * Returns the IANA-defined type and subtype.
+   *
    * @return The unique media type identifier.
    */
   @Override
   public String toString() {
     return mMediaType;
+  }
+}

A src/main/java/com/keenwrite/io/MediaTypeExtension.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import org.apache.commons.io.FilenameUtils;
 import java.io.File;
 import java.util.List;
 import static com.keenwrite.io.MediaType.*;
 import static java.util.List.of;
 /**
  * Responsible for associating file extensions with {@link MediaType} instances.
  * Insertion order must be maintained because the first element in the list
  * represents the file name extension that corresponds to its icon.
  */
 public enum MediaTypeExtension {
   MEDIA_APP_ACAD( APP_ACAD, of( "dwg" ) ),
   MEDIA_APP_PDF( APP_PDF ),
   MEDIA_APP_PS( APP_PS, of( "ps" ) ),
   MEDIA_APP_EPS( APP_EPS ),
   MEDIA_APP_ZIP( APP_ZIP ),
   MEDIA_AUDIO_MP3( AUDIO_MP3 ),
   MEDIA_AUDIO_SIMPLE( AUDIO_SIMPLE, of( "au" ) ),
   MEDIA_AUDIO_WAV( AUDIO_WAV, of( "wav" ) ),
   MEDIA_FONT_OTF( FONT_OTF ),
   MEDIA_FONT_TTF( FONT_TTF ),
   MEDIA_IMAGE_APNG( IMAGE_APNG ),
   MEDIA_IMAGE_BMP( IMAGE_BMP ),
   MEDIA_IMAGE_GIF( IMAGE_GIF ),
   MEDIA_IMAGE_JPEG( IMAGE_JPEG,
                     of( "jpg", "jpe", "jpeg", "jfif", "pjpeg", "pjp" ) ),
   MEDIA_IMAGE_PNG( IMAGE_PNG ),
   MEDIA_IMAGE_PSD( IMAGE_PHOTOSHOP, of( "psd" ) ),
   MEDIA_IMAGE_SVG( IMAGE_SVG_XML, of( "svg" ) ),
   MEDIA_IMAGE_TIFF( IMAGE_TIFF, of( "tiff", "tif" ) ),
   MEDIA_IMAGE_WEBP( IMAGE_WEBP ),
   MEDIA_IMAGE_X_BITMAP( IMAGE_X_BITMAP, of( "xbm" ) ),
   MEDIA_IMAGE_X_PIXMAP( IMAGE_X_PIXMAP, of( "xpm" ) ),
   MEDIA_VIDEO_MNG( VIDEO_MNG, of( "mng" ) ),
   MEDIA_TEXT_MARKDOWN( TEXT_MARKDOWN, of(
     "md", "markdown", "mdown", "mdtxt", "mdtext", "mdwn", "mkd", "mkdown",
     "mkdn" ) ),
   MEDIA_TEXT_PLAIN( TEXT_PLAIN, of( "txt", "asc", "ascii", "text", "utxt" ) ),
   MEDIA_TEXT_R_MARKDOWN( TEXT_R_MARKDOWN, of( "Rmd" ) ),
   MEDIA_TEXT_PROPERTIES( TEXT_PROPERTIES, of( "properties" ) ),
   MEDIA_TEXT_XHTML( TEXT_XHTML, of( "htm", "html", "xhtml" ) ),
   MEDIA_TEXT_XML( TEXT_XML ),
   MEDIA_TEXT_YAML( TEXT_YAML, of( "yaml", "yml" ) ),
   MEDIA_UNDEFINED( UNDEFINED, of( "undefined" ) );
   /**
    * Returns the {@link MediaTypeExtension} that matches the given media type.
+   *
    * @param mediaType The media type to find.
    * @return The correlated value or {@link #MEDIA_UNDEFINED} if not found.
    */
   public static MediaTypeExtension valueFrom( final MediaType mediaType ) {
     for( final var type : values() ) {
       if( type.isMediaType( mediaType ) ) {
         return type;
+      }
+    }
     return MEDIA_UNDEFINED;
+  }
   /**
    * Returns the {@link MediaType} associated with the given file name
    * extension. The extension must not contain a period.
+   *
    * @param extension File name extension, case-insensitive, {@code null}-safe.
    * @return The associated {@link MediaType} as defined by IANA.
    */
   public static MediaType fromExtension( final String extension ) {
     final var sanitized = sanitize( extension );
     for( final var mediaType : MediaTypeExtension.values() ) {
       if( mediaType.isType( sanitized ) ) {
         return mediaType.getMediaType();
+      }
+    }
     return UNDEFINED;
+  }
   /**
    * Returns the {@link MediaType} associated with the given file.
+   *
    * @param file The file having an extension to map to a {@link MediaType}.
    * @return The associated {@link MediaType} as defined by IANA.
    */
   public static MediaType fromFile( final File file ) {
     return fromExtension( FilenameUtils.getExtension( file.getName() ) );
+  }
   private static String sanitize( final String extension ) {
     return extension == null ? "" : extension.toLowerCase();
+  }
   private final MediaType mMediaType;
   private final List<String> mExtensions;
   /**
    * Several media types have only one corresponding standard file name
    * extension; this constructor calls {@link MediaType#getSubtype()} to obtain
    * said extension. Some {@link MediaType}s have a single extension but their
    * assigned IANA name differs (e.g., {@code svg} maps to {@code svg+xml})
    * and thus must not use this constructor.
+   *
    * @param mediaType The {@link MediaType} containing only one extension.
    */
   MediaTypeExtension( final MediaType mediaType ) {
     this( mediaType, of( mediaType.getSubtype() ) );
+  }
   /**
    * Constructs an association of file name extensions to a single {@link
    * MediaType}.
+   *
    * @param mediaType  The {@link MediaType} to associate with the given
    *                   file name extensions.
    * @param extensions The file name extensions used to lookup a corresponding
    *                   {@link MediaType}.
    */
   MediaTypeExtension(
     final MediaType mediaType, final List<String> extensions ) {
     assert mediaType != null;
     assert extensions != null;
     assert !extensions.isEmpty();
     mMediaType = mediaType;
     mExtensions = extensions;
+  }
   /**
    * Returns the first file name extension in the list of file names given
    * at construction time.
+   *
    * @return The one file name to rule them all.
    */
   public String getExtension() {
     return mExtensions.get( 0 );
+  }
   boolean isMediaType( final MediaType mediaType ) {
     return mMediaType == mediaType;
+  }
   private boolean isType( final String sanitized ) {
     for( final var extension : mExtensions ) {
       if( extension.equalsIgnoreCase( sanitized ) ) {
         return true;
+      }
+    }
     return false;
+  }
   private MediaType getMediaType() {
     return mMediaType;
+  }
+}

A src/main/java/com/keenwrite/io/MediaTypeSniffer.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.io.*;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import static com.keenwrite.io.MediaType.*;
 import static java.lang.System.arraycopy;
 /**
  * Associates file signatures with IANA-defined {@link MediaType}s. See:
  * <a href="https://www.garykessler.net/library/file_sigs.html">
  * Gary Kessler's List
  * </a>,
  * <a href="https://en.wikipedia.org/wiki/List_of_file_signatures">
  * Wikipedia's List
  * </a>, and
  * <a href="https://github.com/veniware/Space-Maker/blob/master/FileSignatures.cs">
  * Space Maker's List
  * </a>
  */
 public class MediaTypeSniffer {
   private static final int FORMAT_LENGTH = 11;
   private static final int END_OF_DATA = -2;
   private static final Map<int[], MediaType> FORMAT = new LinkedHashMap<>();
   private static void put( final int[] data, final MediaType mediaType ) {
     FORMAT.put( data, mediaType );
+  }
   static {
     //@formatter:off
     put( ints( 0x3C, 0x73, 0x76, 0x67, 0x20 ), IMAGE_SVG_XML );
     put( ints( 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A ), IMAGE_PNG );
     put( ints( 0xFF, 0xD8, 0xFF, 0xE0 ), IMAGE_JPEG );
     put( ints( 0xFF, 0xD8, 0xFF, 0xEE ), IMAGE_JPEG );
     put( ints( 0xFF, 0xD8, 0xFF, 0xE1, -1, -1, 0x45, 0x78, 0x69, 0x66, 0x00 ), IMAGE_JPEG );
     put( ints( 0x49, 0x49, 0x2A, 0x00 ), IMAGE_TIFF );
     put( ints( 0x4D, 0x4D, 0x00, 0x2A ), IMAGE_TIFF );
     put( ints( 0x47, 0x49, 0x46, 0x38 ), IMAGE_GIF );
     put( ints( 0x52, 0x49, 0x46, 0x46, -1, -1, -1, -1, 0x57, 0x45, 0x42, 0x50 ), IMAGE_WEBP );
     put( ints( 0x25, 0x50, 0x44, 0x46, 0x2D, 0x31, 0x2E ), APP_PDF );
     put( ints( 0x25, 0x21, 0x50, 0x53, 0x2D, 0x41, 0x64, 0x6F, 0x62, 0x65, 0x2D ), APP_EPS );
     put( ints( 0x25, 0x21, 0x50, 0x53 ), APP_PS );
     put( ints( 0x38, 0x42, 0x50, 0x53, 0x00, 0x01 ), IMAGE_PHOTOSHOP );
     put( ints( 0x8A, 0x4D, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A ), VIDEO_MNG );
     put( ints( 0x42, 0x4D ), IMAGE_BMP );
     put( ints( 0xFF, 0xFB, 0x30 ), AUDIO_MP3 );
     put( ints( 0x49, 0x44, 0x33 ), AUDIO_MP3 );
     put( ints( 0x3C, 0x21 ), TEXT_HTML );
     put( ints( 0x3C, 0x68, 0x74, 0x6D, 0x6C ), TEXT_HTML );
     put( ints( 0x3C, 0x68, 0x65, 0x61, 0x64 ), TEXT_HTML );
     put( ints( 0x3C, 0x62, 0x6F, 0x64, 0x79 ), TEXT_HTML );
     put( ints( 0x3C, 0x48, 0x54, 0x4D, 0x4C ), TEXT_HTML );
     put( ints( 0x3C, 0x48, 0x45, 0x41, 0x44 ), TEXT_HTML );
     put( ints( 0x3C, 0x42, 0x4F, 0x44, 0x59 ), TEXT_HTML );
     put( ints( 0x3C, 0x3F, 0x78, 0x6D, 0x6C, 0x20 ), TEXT_XML );
     put( ints( 0xFE, 0xFF, 0x00, 0x3C, 0x00, 0x3f, 0x00, 0x78 ), TEXT_XML );
     put( ints( 0xFF, 0xFE, 0x3C, 0x00, 0x3F, 0x00, 0x78, 0x00 ), TEXT_XML );
     put( ints( 0x23, 0x64, 0x65, 0x66 ), IMAGE_X_BITMAP );
     put( ints( 0x21, 0x20, 0x58, 0x50, 0x4D, 0x32 ), IMAGE_X_PIXMAP );
     put( ints( 0x2E, 0x73, 0x6E, 0x64 ), AUDIO_SIMPLE );
     put( ints( 0x64, 0x6E, 0x73, 0x2E ), AUDIO_SIMPLE );
     put( ints( 0x52, 0x49, 0x46, 0x46 ), AUDIO_WAV );
     put( ints( 0x50, 0x4B ), APP_ZIP );
     put( ints( 0x41, 0x43, -1, -1, -1, -1, 0x00, 0x00, 0x00, 0x00, 0x00 ), APP_ACAD );
     put( ints( 0xCA, 0xFE, 0xBA, 0xBE ), APP_JAVA );
     put( ints( 0xAC, 0xED ), APP_JAVA_OBJECT );
     //@formatter:on
+  }
   /**
    * Returns the {@link MediaType} for a given set of bytes.
+   *
    * @param data Binary data to compare against the list of known formats.
    * @return The IANA-defined {@link MediaType}, or
    * {@link MediaType#UNDEFINED} if indeterminate.
    */
   public static MediaType getMediaType( final byte[] data ) {
     assert data != null;
     final var source = new int[]{
 xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
     };
     for( int i = 0; i < data.length; i++ ) {
       source[ i ] = data[ i ] & 0xFF;
+    }
     for( final var key : FORMAT.keySet() ) {
       int i = -1;
       boolean matches = true;
       while( ++i < FORMAT_LENGTH && key[ i ] != END_OF_DATA && matches ) {
         matches = key[ i ] == source[ i ] || key[ i ] == -1;
+      }
       if( matches ) {
         return FORMAT.get( key );
+      }
+    }
     return UNDEFINED;
+  }
   /**
    * Convenience method to return the probed media type for the given
    * {@link SysFile} instance by delegating to
    * {@link #getMediaType(InputStream)}.
+   *
    * @param file File to ascertain the {@link MediaType}.
    * @return The IANA-defined {@link MediaType}, or
    * {@link MediaType#UNDEFINED} if indeterminate.
    * @throws IOException Could not read from the {@link File}.
    */
   public static MediaType getMediaType( final File file )
     throws IOException {
     try( final var fis = new FileInputStream( file ) ) {
       return getMediaType( fis );
+    }
+  }
   /**
    * Convenience method to return the probed media type for the given
    * {@link BufferedInputStream} instance. <strong>This resets the stream
    * pointer</strong> making the call idempotent. Users of this class should
    * prefer to call this method when operating on streams to avoid advancing
    * the stream.
+   *
    * @param bis Data source to ascertain the {@link MediaType}.
    * @return The IANA-defined {@link MediaType}, or
    * {@link MediaType#UNDEFINED} if indeterminate.
    * @throws IOException Could not read from the stream.
    */
   public static MediaType getMediaType( final BufferedInputStream bis )
     throws IOException {
     bis.mark( FORMAT_LENGTH );
     final var result = getMediaType( (InputStream) bis );
     bis.reset();
     return result;
+  }
   /**
    * Returns the probed media type for the given {@link InputStream} instance.
    * The caller is responsible for closing the stream. <strong>This advances
    * the stream.</strong> Use {@link #getMediaType(BufferedInputStream)} to
    * perform a non-destructive read.
+   *
    * @param is Data source to ascertain the {@link MediaType}.
    * @return The IANA-defined {@link MediaType}, or
    * {@link MediaType#UNDEFINED} if indeterminate.
    * @throws IOException Could not read from the {@link InputStream}.
    */
   private static MediaType getMediaType( final InputStream is )
     throws IOException {
     final var input = new byte[ FORMAT_LENGTH ];
     final var count = is.read( input, 0, FORMAT_LENGTH );
     if( count > 1 ) {
       final var available = new byte[ count ];
       arraycopy( input, 0, available, 0, count );
       return getMediaType( available );
+    }
     return UNDEFINED;
+  }
   /**
    * Creates integer array from the given data, padded with
    * {@link #END_OF_DATA} values up to {@link #FORMAT_LENGTH}.
+   *
    * @param data The input byte values to pad.
    * @return The data with padding.
    */
   private static int[] ints( final int... data ) {
     final var magic = new int[ FORMAT_LENGTH + 1 ];
     int i = -1;
     while( ++i < data.length ) {
       magic[ i ] = data[ i ];
+    }
     while( i < FORMAT_LENGTH ) {
       magic[ i++ ] = END_OF_DATA;
+    }
     return magic;
+  }
+}

A src/main/java/com/keenwrite/io/PollingWatchService.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.nio.file.WatchEvent;
 import java.nio.file.WatchKey;
 import java.nio.file.WatchService;
 import java.nio.file.Watchable;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 /**
  * Responsible for polling the file system to see whether a file has been
  * updated. This is instantiated when an instance of {@link WatchService}
  * cannot be created using the Java API.
  * <p>
  * This is a skeleton class to avoid {@code null} references. In theory,
  * it should never get instantiated. If the application is run on a system
  * that does not support file system events, this should eliminate NPEs.
  * </p>
  */
 public class PollingWatchService implements WatchService {
   private final WatchKey EMPTY_KEY = new WatchKey() {
     private final Watchable WATCHABLE = new Watchable() {
       @Override
       public WatchKey register(
         final WatchService watcher,
         final WatchEvent.Kind<?>[] events,
         final WatchEvent.Modifier... modifiers ) {
         return EMPTY_KEY;
+      }
       @Override
       public WatchKey register(
         final WatchService watcher, final WatchEvent.Kind<?>... events ) {
         return EMPTY_KEY;
+      }
     };
     @Override
     public boolean isValid() {
       return false;
+    }
     @Override
     public List<WatchEvent<?>> pollEvents() {
       return List.of();
+    }
     @Override
     public boolean reset() {
       return false;
+    }
     @Override
     public void cancel() {
+    }
     @Override
     public Watchable watchable() {
       return WATCHABLE;
+    }
   };
   @Override
   public void close() {
+  }
   @Override
   public WatchKey poll() {
     return EMPTY_KEY;
+  }
   @Override
   public WatchKey poll( final long timeout, final TimeUnit unit ) {
     return EMPTY_KEY;
+  }
   @Override
   public WatchKey take() {
     return EMPTY_KEY;
+  }
+}

A src/main/java/com/keenwrite/io/StreamGobbler.java

 package com.keenwrite.io;
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.concurrent.Callable;
 import java.util.function.Consumer;
 import static java.util.concurrent.Executors.newFixedThreadPool;
 /**
  * Consumes the standard output of a {@link Process} created from a
  * {@link ProcessBuilder}. Directs the output to a {@link Consumer} of
  * strings. This will run on its own thread and close the stream when
  * no more data can be processed.
  * <p>
  * <strong>Warning:</strong> Do not use this with binary data, it is only
  * meant for text streams, such as standard out from running command-line
  * applications.
  * </p>
  */
 public class StreamGobbler implements Callable<Boolean> {
   private final InputStream mInput;
   private final Consumer<String> mConsumer;
   /**
    * Constructs a new instance of {@link StreamGobbler} that is capable of
    * reading an {@link InputStream} and passing each line of textual data from
    * that stream over to a string {@link Consumer}.
+   *
    * @param input    The stream having input to pass to the consumer.
    * @param consumer The {@link Consumer} that receives each line.
    */
   private StreamGobbler(
     final InputStream input,
     final Consumer<String> consumer ) {
     assert input != null;
     assert consumer != null;
     mInput = input;
     mConsumer = consumer;
+  }
   /**
    * Consumes the input until no more data is available. Closes the stream.
+   *
    * @return {@link Boolean#TRUE} always.
    * @throws IOException Could not read from the stream.
    */
   @Override
   public Boolean call() throws IOException {
     try( final var input = new InputStreamReader( mInput );
          final var buffer = new BufferedReader( input ) ) {
       buffer.lines().forEach( mConsumer );
+    }
     return Boolean.TRUE;
+  }
   /**
    * Reads the given {@link InputStream} on a separate thread and passes
    * each line of text input to the given {@link Consumer}.
+   *
    * @param inputStream The stream having input to pass to the consumer.
    * @param consumer    The {@link Consumer} that receives each line.
    */
   public static void gobble(
     final InputStream inputStream, final Consumer<String> consumer ) {
     try( final var executor = newFixedThreadPool( 1 ) ) {
       executor.submit( new StreamGobbler( inputStream, consumer ) );
+    }
+  }
+}

A src/main/java/com/keenwrite/io/SysFile.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.Optional;
 import java.util.function.Function;
 import java.util.regex.Pattern;
 import static com.keenwrite.util.DataTypeConverter.toHex;
 import static java.lang.System.getenv;
 import static java.nio.file.Files.isExecutable;
 import static java.util.regex.Pattern.compile;
 import static java.util.regex.Pattern.quote;
 import static org.apache.commons.lang3.SystemUtils.IS_OS_WINDOWS;
 /**
  * Responsible for file-related functionality.
  */
 public final class SysFile extends java.io.File {
   /**
    * For finding executable programs. These are used in an O( n^2 ) search,
    * so don't add more entries than necessary.
    */
   private static final String[] EXTENSIONS = new String[]
     {"", ".exe", ".bat", ".cmd", ".msi", ".com"};
   /**
    * Number of bytes to read at a time when computing this file's checksum.
    */
   private static final int BUFFER_SIZE = 16384;
   //@formatter:off
   private static final String SYS_KEY =
     "HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment";
   private static final String USR_KEY =
     "HKEY_CURRENT_USER\\Environment";
   //@formatter:on
   /**
    * Regular expression pattern for matching %VARIABLE% names.
    */
   private static final String VAR_REGEX = "%.*?%";
   private static final Pattern VAR_PATTERN = compile( VAR_REGEX );
   private static final String REG_REGEX = "\\s*path\\s+REG_EXPAND_SZ\\s+(.*)";
   private static final Pattern REG_PATTERN = compile( REG_REGEX );
   /**
    * Creates a new instance for a given file name.
+   *
    * @param filename Filename to query existence as executable.
    */
   public SysFile( final String filename ) {
     super( filename );
+  }
   /**
    * Creates a new instance for a given {@link File}. This is useful for
    * validating checksums against an existing {@link File} instance that
    * may optionally exist in a directory listed in the PATH environment
    * variable.
+   *
    * @param file The file to change into a "system file".
    */
   public SysFile( final File file ) {
     super( file.getAbsolutePath() );
+  }
   /**
    * Answers whether the path returned from {@link #locate()} is an executable
    * that can be run using a {@link ProcessBuilder}.
    */
   public boolean canRun() {
     return locate().isPresent();
+  }
   /**
    * For a file name that represents an executable (without an extension)
    * file, this determines the first matching executable found in the PATH
    * environment variable. This will search the PATH each time the method
    * is invoked, triggering a full directory scan for all paths listed in
    * the environment variable. The result is not cached, so avoid calling
    * this in a critical loop.
    * <p>
    * After installing software, the software might be located in the PATH,
    * but not available to run by its name alone. In such cases, we need the
    * absolute path to the executable to run it. This will always return
    * the fully qualified path, otherwise an empty result.
+   *
    * @param map The mapping function of registry variable names to values.
    * @return The fully qualified {@link Path} to the executable filename
    * provided at construction time.
    */
   public Optional<Path> locate( final Function<String, String> map ) {
     final var exe = getName();
     final var paths = paths( map ).split( quote( pathSeparator ) );
     for( final var path : paths ) {
       final var p = Path.of( path ).resolve( exe );
       for( final var extension : EXTENSIONS ) {
         final var filename = Path.of( p + extension );
         if( isExecutable( filename ) ) {
           return Optional.of( filename );
+        }
+      }
+    }
     return Optional.empty();
+  }
   /**
    * Convenience method that locates a binary executable file in the path
    * by using {@link System#getenv(String)} to retrieve environment variables
    * that are expanded when parsing the PATH.
+   *
    * @see #locate(Function)
    */
   public Optional<Path> locate() {
     return locate( System::getenv );
+  }
   /**
    * Changes to the PATH environment variable aren't reflected for the
    * currently running task. The registry, however, contains the updated
    * value. Reading the registry is a hack.
+   *
    * @param map The mapping function of registry variable names to values.
    * @return The revised PATH variables as stored in the registry.
    */
   private String paths( final Function<String, String> map ) {
     return IS_OS_WINDOWS ? pathsWindows( map ) : pathsSane();
+  }
   private String pathsSane() {
     return getenv( "PATH" );
+  }
   private String pathsWindows( final Function<String, String> map ) {
     try {
       final var hklm = query( SYS_KEY );
       final var hkcu = query( USR_KEY );
       return expand( hklm, map ) + pathSeparator + expand( hkcu, map );
     } catch( final IOException ex ) {
       // Return the PATH environment variable if the registry query fails.
       return pathsSane();
+    }
+  }
   /**
    * Queries a registry key PATH value.
+   *
    * @param key The registry key name to look up.
    * @return The value for the registry key.
    */
   private String query( final String key ) throws IOException {
     final var regVarName = "path";
     final var args = new String[]{"reg", "query", key, "/v", regVarName};
     final var process = Runtime.getRuntime().exec( args );
     final var stream = process.getInputStream();
     final var regValue = new StringBuffer( 1024 );
     StreamGobbler.gobble( stream, text -> {
       if( text.contains( regVarName ) ) {
         regValue.append( parseRegEntry( text ) );
+      }
     } );
     try {
       process.waitFor();
     } catch( final InterruptedException ex ) {
       throw new IOException( ex );
     } finally {
       process.destroy();
+    }
     return regValue.toString();
+  }
   String parseRegEntry( final String text ) {
     assert text != null;
     final var matcher = REG_PATTERN.matcher( text );
     return matcher.find() ? matcher.group( 1 ) : text.trim();
+  }
   /**
    * PATH environment variables returned from the registry have unexpanded
    * variables of the form %VARIABLE%. This method will expand those values,
    * if possible, from the environment. This will only perform a single
    * expansion, which should be adequate for most needs.
+   *
    * @param s The %VARIABLE%-encoded value to expand.
    * @return The given value with all encoded values expanded.
    */
   String expand( final String s, final Function<String, String> map ) {
     // Assigned to the unexpanded string, initially.
     String expanded = s;
     final var matcher = VAR_PATTERN.matcher( expanded );
     while( matcher.find() ) {
       final var match = matcher.group( 0 );
       String value = map.apply( match );
       if( value == null ) {
         value = "";
+      }
       else {
         value = value.replace( "\\", "\\\\" );
+      }
       final var subexpr = compile( quote( match ) );
       expanded = subexpr.matcher( expanded ).replaceAll( value );
+    }
     return expanded;
+  }
   /**
    * Answers whether this file's SHA-256 checksum equals the given
    * hexadecimal-encoded checksum string.
+   *
    * @param hex The string to compare against the checksum for this file.
    * @return {@code true} if the checksums match; {@code false} on any
    * error or checksums don't match.
    */
   public boolean isChecksum( final String hex ) {
     assert hex != null;
     try {
       return checksum( "SHA-256" ).equalsIgnoreCase( hex );
     } catch( final Exception ex ) {
       return false;
+    }
+  }
   /**
    * Returns the hash code for this file.
+   *
    * @return The hex-encoded hash code for the file contents.
    */
   @SuppressWarnings( "SameParameterValue" )
   private String checksum( final String algorithm )
     throws NoSuchAlgorithmException, IOException {
     final var digest = MessageDigest.getInstance( algorithm );
     try( final var in = new FileInputStream( this ) ) {
       final var bytes = new byte[ BUFFER_SIZE ];
       int count;
       while( (count = in.read( bytes )) != -1 ) {
         digest.update( bytes, 0, count );
+      }
       return toHex( digest.digest() );
+    }
+  }
+}

A src/main/java/com/keenwrite/io/UserDataDir.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.nio.file.Path;
 import static java.lang.System.getProperty;
 import static java.lang.System.getenv;
 import static org.apache.commons.lang3.SystemUtils.*;
 /**
  * Responsible for determining the directory to write application data, across
  * multiple platforms. See also:
+ *
  * <ul>
  * <li>
  *   <a href="https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html">
  *     Linux: XDG Base Directory Specification
  *   </a>
  * </li>
  * <li>
  *   <a href="https://learn.microsoft.com/en-us/windows/deployment/usmt/usmt-recognized-environment-variables">
  *     Windows: Recognized environment variables
  *   </a>
  * </li>
  * <li>
  *   <a href="https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/FileSystemOverview/FileSystemOverview.html">
  *     macOS: File System Programming Guide
  *   </a>
  * </li>
  * </ul>
  * </p>
  */
 public final class UserDataDir {
   private static final Path UNDEFINED = Path.of( "/" );
   private static final String PROP_USER_HOME = getProperty( "user.home" );
   private static final String PROP_USER_DIR = getProperty( "user.dir" );
   private static final String PROP_OS_VERSION = getProperty( "os.version" );
   private static final String ENV_APPDATA = getenv( "AppData" );
   private static final String ENV_XDG_DATA_HOME = getenv( "XDG_DATA_HOME" );
   private UserDataDir() { }
   /**
    * Makes a valiant attempt at determining where to create application-specific
    * files, regardless of operating system.
+   *
    * @param appName The application name that seeks to create files.
    * @return A fully qualified {@link Path} to a directory wherein files may
    * be created that are user- and application-specific.
    */
   public static Path getAppPath( final String appName ) {
     final var osPath = isWindows()
       ? getWinAppPath()
       : isMacOs()
       ? getMacAppPath()
       : isUnix()
       ? getUnixAppPath()
       : UNDEFINED;
     final var path = osPath.equals( UNDEFINED )
       ? getDefaultAppPath( appName )
       : osPath.resolve( appName );
     final var alternate = Path.of( PROP_USER_DIR, appName );
     return ensureExists( path )
       ? path
       : ensureExists( alternate )
       ? alternate
       : Path.of( PROP_USER_DIR );
+  }
   private static Path getWinAppPath() {
     return isValid( ENV_APPDATA )
       ? Path.of( ENV_APPDATA )
       : home( getWinVerAppPath() );
+  }
   /**
    * Gets the application path with respect to the Windows version.
+   *
    * @return The directory name paths relative to the user's home directory.
    */
   private static String[] getWinVerAppPath() {
     return PROP_OS_VERSION.startsWith( "5." )
       ? new String[]{"Application Data"}
       : new String[]{"AppData", "Roaming"};
+  }
   private static Path getMacAppPath() {
     final var path = home( "Library", "Application Support" );
     return ensureExists( path ) ? path : UNDEFINED;
+  }
   private static Path getUnixAppPath() {
     // Fallback in case the XDG data directory is undefined.
     var path = home( ".local", "share" );
     if( isValid( ENV_XDG_DATA_HOME ) ) {
       final var xdgPath = Path.of( ENV_XDG_DATA_HOME );
       path = ensureExists( xdgPath ) ? xdgPath : path;
+    }
     return path;
+  }
   /**
    * Returns a hidden directory relative to the user's home directory.
+   *
    * @param appName The application name.
    * @return A suitable directory for storing application files.
    */
   private static Path getDefaultAppPath( final String appName ) {
     return home( '.' + appName );
+  }
   private static Path home( final String... paths ) {
     return Path.of( PROP_USER_HOME, paths );
+  }
   /**
    * Verifies whether the path exists or was created.
+   *
    * @param path The directory to verify.
    * @return {@code true} if the path already exists or was created,
    * {@code false} if the directory doesn't exist and couldn't be created.
    */
   private static boolean ensureExists( final Path path ) {
     final var file = path.toFile();
     return file.exists() || file.mkdirs();
+  }
   /**
    * Answers whether the given string contains content.
+   *
    * @param s The string to check, may be {@code null}.
    * @return {@code true} if the string is neither {@code null} nor blank.
    */
   private static boolean isValid( final String s ) {
     return !(s == null || s.isBlank());
+  }
   private static boolean isWindows() {
     return IS_OS_WINDOWS;
+  }
   private static boolean isMacOs() {
     return IS_OS_MAC;
+  }
   private static boolean isUnix() {
     return IS_OS_UNIX;
+  }
+}

A src/main/java/com/keenwrite/io/Zip.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.BiConsumer;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 import static java.nio.file.Files.createDirectories;
 import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
 /**
  * Responsible for managing zipped archive files. Does not handle archives
  * within archives.
  */
 public final class Zip {
   /**
    * Extracts the contents of the zip archive into its current directory. The
    * contents of the archive must be {@link StandardCharsets#UTF_8}. For
    * example, if the {@link Path} is <code>/tmp/filename.zip</code>, then
    * the contents of the file will be extracted into <code>/tmp</code>.
+   *
    * @param zipPath The {@link Path} to the zip file to extract.
    * @throws IOException Could not extract the zip file, zip entries, or find
    *                     the parent directory that contains the path to the
    *                     zip archive.
    */
   public static void extract( final Path zipPath ) throws IOException {
     final var path = zipPath.getParent().normalize();
     iterate( zipPath, ( zipFile, zipEntry ) -> {
       // Determine the directory name where the zip archive resides. Files will
       // be extracted relative to that directory.
       final var zipEntryPath = path.resolve( zipEntry.getName() );
       // Guard against zip slip.
       if( zipEntryPath.normalize().startsWith( path ) ) {
         try {
           extract( zipFile, zipEntry, zipEntryPath );
         } catch( final IOException ex ) {
           throw new UncheckedIOException( ex );
+        }
+      }
     } );
+  }
   /**
    * Returns the first root-level directory found in the zip archive. Only call
    * this function if you know there is exactly one top-level directory in the
    * zip archive. If there are multiple top-level directories, one of the
    * directories will be returned, albeit indeterminately. No files are
    * extracted when calling this function.
+   *
    * @param zipPath The path to the zip archive to process.
    * @return The fully qualified root-level directory resolved relatively to
    * the zip archive itself.
    * @throws IOException Could not process the zip archive.
    */
   public static Path root( final Path zipPath ) throws IOException {
     // Directory that contains the zip archive file.
     final var zipParent = zipPath.getParent();
     if( zipParent == null ) {
       throw new IOException( zipPath + " has no parent" );
+    }
     final var result = new AtomicReference<>( zipParent );
     iterate( zipPath, ( zipFile, zipEntry ) -> {
       final var zipEntryPath = Path.of( zipEntry.getName() );
       // The first entry without a parent is considered the root-level entry.
       // Return the relative directory path to that entry.
       if( zipEntryPath.getParent() == null ) {
         result.set( zipParent.resolve( zipEntryPath ) );
+      }
     } );
     // The zip file doesn't have a sane folder structure, so return the
     // directory where the zip file was found.
     return result.get();
+  }
   /**
    * Processes each entry in the zip archive.
+   *
    * @param zipPath  The path to the zip file being processed.
    * @param consumer The {@link BiConsumer} that receives each entry in the
    *                 zip archive.
    * @throws IOException Could not extract zip file entries.
    */
   private static void iterate(
     final Path zipPath,
     final BiConsumer<ZipFile, ZipEntry> consumer )
     throws IOException {
     assert zipPath.toFile().isFile();
     try( final var zipFile = new ZipFile( zipPath.toFile() ) ) {
       final var entries = zipFile.entries();
       while( entries.hasMoreElements() ) {
         consumer.accept( zipFile, entries.nextElement() );
+      }
+    }
+  }
   /**
    * Extracts a single entry of a zip file to a given directory. This will
    * create the necessary directory path if it doesn't exist. Empty
    * directories are not re-created.
+   *
    * @param zipFile      The zip archive to extract.
    * @param zipEntry     An entry in the zip archive.
    * @param zipEntryPath The file location to write the zip entry.
    * @throws IOException Could not extract the zip file entry.
    */
   private static void extract(
     final ZipFile zipFile,
     final ZipEntry zipEntry,
     final Path zipEntryPath ) throws IOException {
     // Only extract files, skip empty directories.
     if( !zipEntry.isDirectory() ) {
       createDirectories( zipEntryPath.getParent() );
       try( final var in = zipFile.getInputStream( zipEntry ) ) {
         Files.copy( in, zipEntryPath, REPLACE_EXISTING );
+      }
+    }
+  }
+}

A src/main/java/com/keenwrite/io/downloads/DownloadManager.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io.downloads;
 import com.keenwrite.io.MediaType;
 import com.keenwrite.io.MediaTypeSniffer;
 import java.io.*;
 import java.net.HttpURLConnection;
 import java.net.URI;
 import java.net.URL;
 import java.time.Duration;
 import java.util.zip.GZIPInputStream;
 import static java.lang.Math.toIntExact;
 import static java.lang.String.format;
 import static java.lang.System.*;
 import static java.net.HttpURLConnection.HTTP_OK;
 import static java.net.HttpURLConnection.setFollowRedirects;
 /**
  * Responsible for downloading files and publishing status updates. This will
  * download a resource provided by an instance of {@link URL} into a given
  * {@link OutputStream}.
  */
 public final class DownloadManager {
   static {
     setProperty( "http.keepAlive", "false" );
     setFollowRedirects( true );
+  }
   /**
    * Number of bytes to read at a time.
    */
   private static final int BUFFER_SIZE = 16384;
   /**
    * HTTP request timeout.
    */
   private static final Duration TIMEOUT = Duration.ofSeconds( 30 );
   @FunctionalInterface
   public interface ProgressListener {
     /**
      * Called when a chunk of data has been read. This is called synchronously
      * when downloading the data; do not execute long-running tasks in this
      * method (a few milliseconds is fine).
+     *
      * @param percentage A value between 0 and 100, inclusive, represents the
      *                   percentage of bytes downloaded relative to the total.
      *                   A value of -1 means the total number of bytes to
      *                   download is unknown.
      * @param bytes      When {@code percentage} is greater than or equal to
      *                   zero, this is the total number of bytes. When {@code
      *                   percentage} equals -1, this is the number of bytes
      *                   read so far.
      */
     void update( int percentage, long bytes );
+  }
   /**
    * Callers may check the value of isSuccessful
    */
   public static final class DownloadToken implements Closeable {
     private final HttpURLConnection mConn;
     private final BufferedInputStream mInput;
     private final MediaType mMediaType;
     private final long mBytesTotal;
     private DownloadToken(
       final HttpURLConnection conn,
       final BufferedInputStream input,
       final MediaType mediaType
     ) {
       assert conn != null;
       assert input != null;
       assert mediaType != null;
       mConn = conn;
       mInput = input;
       mMediaType = mediaType;
       mBytesTotal = conn.getContentLength();
+    }
     /**
      * Provides the ability to download remote files asynchronously while
      * being updated regarding the download progress. The given
      * {@link OutputStream} will be closed after downloading is complete.
+     *
      * @param output   Where to write the file contents.
      * @param listener Receives download progress status updates.
      * @return A {@link Runnable} task that can be executed in the background
      * to download the resource for this {@link DownloadToken}.
      */
     public Runnable download(
       final OutputStream output,
       final ProgressListener listener ) {
       return () -> {
         final var buffer = new byte[ BUFFER_SIZE ];
         final var stream = getInputStream();
         final var bytesTotal = mBytesTotal;
         long bytesTally = 0;
         int bytesRead;
         try( output ) {
           while( (bytesRead = stream.read( buffer )) != -1 ) {
             if( Thread.currentThread().isInterrupted() ) {
               throw new InterruptedException();
+            }
             bytesTally += bytesRead;
             if( bytesTotal > 0 ) {
               listener.update(
                 toIntExact( bytesTally * 100 / bytesTotal ),
                 bytesTotal
               );
+            }
             else {
               listener.update( -1, bytesRead );
+            }
             output.write( buffer, 0, bytesRead );
+          }
         } catch( final Exception ex ) {
           throw new RuntimeException( ex );
         } finally {
           close();
+        }
       };
+    }
     public void close() {
       try {
         getInputStream().close();
       } catch( final Exception ignored ) {
       } finally {
         mConn.disconnect();
+      }
+    }
     /**
      * Returns the input stream to the resource to download.
+     *
      * @return The stream to read.
      */
     public BufferedInputStream getInputStream() {
       return mInput;
+    }
     public MediaType getMediaType() {
       return mMediaType;
+    }
     /**
      * Answers whether the type of content associated with the download stream
      * is a scalable vector graphic.
+     *
      * @return {@code true} if the given {@link MediaType} has SVG contents.
      */
     public boolean isSvg() {
       return getMediaType().isSvg();
+    }
+  }
   /**
    * Opens the input stream for the resource to download.
+   *
    * @param url The {@link URL} resource to download.
    * @return A token that can be used for downloading the content with
    * periodic updates or retrieving the stream for downloading the content.
    * @throws IOException The stream could not be opened.
    */
   public static DownloadToken open( final String url ) throws IOException {
     // Pass an undefined media type so that any type of file can be retrieved.
     return open( new URL( url ) );
+  }
   public static DownloadToken open( final URI uri )
     throws IOException {
     return open( uri.toURL() );
+  }
   /**
    * Opens the input stream for the resource to download and verifies that
    * the given {@link MediaType} matches the requested type. Callers are
    * responsible for closing the {@link DownloadManager} to close the
    * underlying stream and the HTTP connection. Connections must be closed by
    * callers if {@link DownloadToken#download(OutputStream, ProgressListener)}
    * isn't called (i.e., {@link DownloadToken#getMediaType()} is called
    * after the transport layer's Content-Type is requested but not contents
    * are downloaded).
+   *
    * @param url The {@link URL} resource to download.
    * @return A token that can be used for downloading the content with
    * periodic updates or retrieving the stream for downloading the content.
    * @throws IOException The resource could not be downloaded.
    */
   public static DownloadToken open( final URL url ) throws IOException {
     final var conn = connect( url );
     MediaType contentType;
     try {
       contentType = MediaType.valueFrom( conn.getContentType() );
     } catch( final Exception ex ) {
       // If the media type couldn't be detected, try using the stream.
       contentType = MediaType.UNDEFINED;
+    }
     final var input = open( conn );
     // Peek at the magic header bytes to determine the media type.
     final var magicType = MediaTypeSniffer.getMediaType( input );
     // If the transport protocol's Content-Type doesn't align with the
     // media type for the magic header, defer to the transport protocol.
     final MediaType mediaType =
       !contentType.equals( magicType ) && !magicType.isUndefined()
         ? contentType
         : magicType;
     return new DownloadToken( conn, input, mediaType );
+  }
   /**
    * Establishes a connection to the remote {@link URL} resource.
+   *
    * @param url The {@link URL} representing a resource to download.
    * @return The connection manager for the {@link URL}.
    * @throws IOException         Could not establish a connection.
    * @throws ArithmeticException Could not compute a timeout value (this
    *                             should never happen because the timeout is
    *                             less than a minute).
    * @see #TIMEOUT
    */
   private static HttpURLConnection connect( final URL url )
     throws IOException, ArithmeticException {
     // Both HTTP and HTTPS are covered by this condition.
     if( url.openConnection() instanceof HttpURLConnection conn ) {
       conn.setUseCaches( false );
       conn.setInstanceFollowRedirects( true );
       conn.setRequestProperty( "Accept-Encoding", "gzip" );
       conn.setRequestProperty( "User-Agent", getProperty( "http.agent" ) );
       conn.setRequestMethod( "GET" );
       conn.setConnectTimeout( toIntExact( TIMEOUT.toMillis() ) );
       conn.setRequestProperty( "connection", "close" );
       conn.connect();
       final var code = conn.getResponseCode();
       if( code != HTTP_OK ) {
         final var message = format(
           "%s [HTTP %d: %s]",
           url.getFile(),
           code,
           conn.getResponseMessage()
         );
         throw new IOException( message );
+      }
       return conn;
+    }
     throw new UnsupportedOperationException( url.toString() );
+  }
   /**
    * Returns a stream in an open state. Callers are responsible for closing.
+   *
    * @param conn The connection to open, which could be compressed.
    * @return The open stream.
    * @throws IOException Could not open the stream.
    */
   private static BufferedInputStream open( final HttpURLConnection conn )
     throws IOException {
     return open( conn.getContentEncoding(), conn.getInputStream() );
+  }
   /**
    * Returns a stream in an open state. Callers are responsible for closing.
    * The input stream may be compressed.
+   *
    * @param encoding The content encoding for the stream.
    * @param is       The stream to wrap with a suitable decoder.
    * @return The open stream, with any gzip content-encoding decoded.
    * @throws IOException Could not open the stream.
    */
   private static BufferedInputStream open(
     final String encoding, final InputStream is ) throws IOException {
     return new BufferedInputStream(
       "gzip".equalsIgnoreCase( encoding )
         ? new GZIPInputStream( is )
         : is
     );
+  }
+}

A src/main/java/com/keenwrite/io/downloads/events/DownloadConnectionFailedEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io.downloads.events;
 import java.net.URL;
 /**
  * Collates information about an HTTP connection that could not be established.
  */
 public class DownloadConnectionFailedEvent extends DownloadEvent {
   private final Exception mEx;
   /**
    * Constructs a new event that tracks the status of downloading a file.
+   *
    * @param url The {@link URL} that has triggered a download event.
    * @param ex  The reason the connection failed.
    */
   public DownloadConnectionFailedEvent(
     final URL url, final Exception ex ) {
     super( url );
     mEx = ex;
+  }
   public static void fire( final URL url, final Exception ex ) {
     new DownloadConnectionFailedEvent( url, ex ).publish();
+  }
   /**
    * Returns the {@link Exception} that caused this event to be published.
+   *
    * @return The {@link Exception} encountered when establishing a connection.
    */
   public Exception getException() {
     return mEx;
+  }
+}

A src/main/java/com/keenwrite/io/downloads/events/DownloadEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io.downloads.events;
 import com.keenwrite.events.AppEvent;
 import java.net.URL;
 import java.time.Instant;
 /**
  * The parent class to all download-related status events.
  */
 public class DownloadEvent implements AppEvent {
   private final Instant mInstant = Instant.now();
   private final URL mUrl;
   /**
    * Constructs a new event that tracks the status of downloading a file.
+   *
    * @param url The {@link URL} that has triggered a download event.
    */
   public DownloadEvent( final URL url ) {
     mUrl = url;
+  }
   /**
    * Returns the download link as an instance of {@link URL}.
+   *
    * @return The {@link URL} being downloaded.
    */
   public URL getUrl() {
     return mUrl;
+  }
   /**
    * Returns the moment in time that this event was published.
+   *
    * @return The published date and time.
    */
   public Instant when() {
     return mInstant;
+  }
+}

A src/main/java/com/keenwrite/io/downloads/events/DownloadFailedEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io.downloads.events;
 import java.net.URL;
 public class DownloadFailedEvent extends DownloadEvent {
   private final int mResponseCode;
   /**
    * Constructs a new event that indicates downloading a file was not
    * successful.
+   *
    * @param url          The {@link URL} that has triggered a download event.
    * @param responseCode The HTTP response code associated with the failure.
    */
   public DownloadFailedEvent( final URL url, final int responseCode ) {
     super( url );
     mResponseCode = responseCode;
+  }
   public static void fire( final URL url, final int responseCode ) {
     new DownloadFailedEvent( url, responseCode ).publish();
+  }
   /**
    * Returns the HTTP response code for a failed download.
+   *
    * @return An HTTP response code.
    */
   public int getResponseCode() {
     return mResponseCode;
+  }
+}

A src/main/java/com/keenwrite/io/downloads/events/DownloadStartedEvent.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io.downloads.events;
 import java.net.URL;
 /**
  * Collates information about a document that has started downloading.
  */
 public class DownloadStartedEvent extends DownloadEvent {
   public DownloadStartedEvent( final URL url ) {
     super( url );
+  }
   public static void fire( final URL url ) {
     new DownloadStartedEvent( url ).publish();
+  }
+}

A src/main/java/com/keenwrite/predicates/PredicateFactory.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.predicates;
 import java.io.File;
 import java.util.Collection;
 import java.util.function.Predicate;
 import static java.lang.String.join;
 import static java.nio.file.FileSystems.getDefault;
 /**
  * Provides a number of simple {@link Predicate} instances for various types
  * of string comparisons, including basic strings and file name strings.
  */
 public final class PredicateFactory {
   /**
    * Creates an instance of {@link Predicate} that matches a globbed file
    * name pattern.
+   *
    * @param pattern The file name pattern to match.
    * @return A {@link Predicate} that can answer whether a given file name
    * matches the given glob pattern.
    */
   public static Predicate<File> createFileTypePredicate(
       final String pattern ) {
     final var matcher = getDefault().getPathMatcher(
         "glob:**{" + pattern + "}"
     );
     return file -> matcher.matches( file.toPath() );
+  }
   /**
    * Creates an instance of {@link Predicate} that matches any file name from
    * a {@link Collection} of file name patterns. The given patterns are joined
    * with commas into a single comma-separated list.
+   *
    * @param patterns The file name patterns to be matched.
    * @return A {@link Predicate} that can answer whether a given file name
    * matches the given glob patterns.
    */
   public static Predicate<File> createFileTypePredicate(
       final Collection<String> patterns ) {
     return createFileTypePredicate( join( ",", patterns ) );
+  }
   /**
    * Creates an instance of {@link Predicate} that compares whether the given
    * {@code reference} string is contained by the comparator. Comparison is
    * case-insensitive. The test will also pass if the comparate is empty.
+   *
    * @param comparator The string to check as being contained.
    * @return A {@link Predicate} that can answer whether the given string
    * is contained within the comparator, or the comparate is empty.
    */
   public static Predicate<String> createStringContainsPredicate(
       final String comparator ) {
     return comparate -> comparate.isEmpty() ||
         comparate.toLowerCase().contains( comparator.toLowerCase() );
+  }
   /**
    * Creates an instance of {@link Predicate} that compares whether the given
    * {@code reference} string is starts with the comparator. Comparison is
    * case-insensitive.
+   *
    * @param comparator The string to check as being contained.
    * @return A {@link Predicate} that can answer whether the given string
    * is contained within the comparator.
    */
   public static Predicate<String> createStringStartsPredicate(
       final String comparator ) {
     return comparate ->
         comparate.toLowerCase().startsWith( comparator.toLowerCase() );
+  }
+}

A src/main/java/com/keenwrite/preferences/AppKeys.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import static com.keenwrite.preferences.Key.key;
 /**
  * Responsible for defining constants used throughout the application that
  * represent persisted preferences.
  */
 public final class AppKeys {
   //@formatter:off
   private static final Key KEY_ROOT = key( "workspace" );
   public static final Key KEY_META = key( KEY_ROOT, "meta" );
   public static final Key KEY_META_NAME = key( KEY_META, "name" );
   public static final Key KEY_META_VERSION = key( KEY_META, "version" );
   public static final Key KEY_DOC = key( KEY_ROOT, "document" );
   public static final Key KEY_DOC_META = key( KEY_DOC, "meta" );
   public static final Key KEY_EDITOR = key( KEY_ROOT, "editor" );
   public static final Key KEY_EDITOR_AUTOSAVE = key( KEY_EDITOR, "autosave" );
   public static final Key KEY_R = key( KEY_ROOT, "r" );
   public static final Key KEY_R_SCRIPT = key( KEY_R, "script" );
   public static final Key KEY_R_DIR = key( KEY_R, "dir" );
   public static final Key KEY_R_DELIM = key( KEY_R, "delimiter" );
   public static final Key KEY_R_DELIM_BEGAN = key( KEY_R_DELIM, "began" );
   public static final Key KEY_R_DELIM_ENDED = key( KEY_R_DELIM, "ended" );
   public static final Key KEY_IMAGES = key( KEY_ROOT, "images" );
   public static final Key KEY_CACHES_DIR = key( KEY_IMAGES, "cache" );
   public static final Key KEY_IMAGES_DIR = key( KEY_IMAGES, "dir" );
   public static final Key KEY_IMAGES_ORDER = key( KEY_IMAGES, "order" );
   public static final Key KEY_IMAGES_RESIZE = key( KEY_IMAGES, "resize" );
   public static final Key KEY_IMAGES_SERVER = key( KEY_IMAGES, "server" );
   public static final Key KEY_DEF = key( KEY_ROOT, "definition" );
   public static final Key KEY_DEF_PATH = key( KEY_DEF, "path" );
   public static final Key KEY_DEF_DELIM = key( KEY_DEF, "delimiter" );
   public static final Key KEY_DEF_DELIM_BEGAN = key( KEY_DEF_DELIM, "began" );
   public static final Key KEY_DEF_DELIM_ENDED = key( KEY_DEF_DELIM, "ended" );
   public static final Key KEY_UI = key( KEY_ROOT, "ui" );
   public static final Key KEY_UI_RECENT = key( KEY_UI, "recent" );
   public static final Key KEY_UI_RECENT_DIR = key( KEY_UI_RECENT, "dir" );
   public static final Key KEY_UI_RECENT_DOCUMENT = key( KEY_UI_RECENT, "document" );
   public static final Key KEY_UI_RECENT_OFFSET = key( KEY_UI_RECENT, "offset" );
   public static final Key KEY_UI_RECENT_DEFINITION = key( KEY_UI_RECENT, "definition" );
   public static final Key KEY_UI_RECENT_EXPORT = key( KEY_UI_RECENT, "export" );
   public static final Key KEY_UI_RECENT_OPEN = key( KEY_UI_RECENT, "files" );
   public static final Key KEY_UI_RECENT_OPEN_PATH = key( KEY_UI_RECENT_OPEN, "path" );
   public static final Key KEY_UI_FONT = key( KEY_UI, "font" );
   public static final Key KEY_UI_FONT_EDITOR = key( KEY_UI_FONT, "editor" );
   public static final Key KEY_UI_FONT_EDITOR_NAME = key( KEY_UI_FONT_EDITOR, "name" );
   public static final Key KEY_UI_FONT_EDITOR_SIZE = key( KEY_UI_FONT_EDITOR, "size" );
   public static final Key KEY_UI_FONT_PREVIEW = key( KEY_UI_FONT, "preview" );
   public static final Key KEY_UI_FONT_PREVIEW_NAME = key( KEY_UI_FONT_PREVIEW, "name" );
   public static final Key KEY_UI_FONT_PREVIEW_SIZE = key( KEY_UI_FONT_PREVIEW, "size" );
   public static final Key KEY_UI_FONT_PREVIEW_MONO = key( KEY_UI_FONT_PREVIEW, "mono" );
   public static final Key KEY_UI_FONT_PREVIEW_MONO_NAME = key( KEY_UI_FONT_PREVIEW_MONO, "name" );
   public static final Key KEY_UI_FONT_PREVIEW_MONO_SIZE = key( KEY_UI_FONT_PREVIEW_MONO, "size" );
   public static final Key KEY_UI_FONT_MATH = key( KEY_UI_FONT, "math" );
   public static final Key KEY_UI_FONT_MATH_SIZE = key( KEY_UI_FONT_MATH, "size" );
   public static final Key KEY_UI_WINDOW = key( KEY_UI, "window" );
   public static final Key KEY_UI_WINDOW_X = key( KEY_UI_WINDOW, "x" );
   public static final Key KEY_UI_WINDOW_Y = key( KEY_UI_WINDOW, "y" );
   public static final Key KEY_UI_WINDOW_W = key( KEY_UI_WINDOW, "width" );
   public static final Key KEY_UI_WINDOW_H = key( KEY_UI_WINDOW, "height" );
   public static final Key KEY_UI_WINDOW_MAX = key( KEY_UI_WINDOW, "maximized" );
   public static final Key KEY_UI_WINDOW_FULL = key( KEY_UI_WINDOW, "full" );
   public static final Key KEY_UI_SKIN = key( KEY_UI, "skin" );
   public static final Key KEY_UI_SKIN_SELECTION = key( KEY_UI_SKIN, "selection" );
   public static final Key KEY_UI_SKIN_CUSTOM = key( KEY_UI_SKIN, "custom" );
   public static final Key KEY_UI_PREVIEW = key( KEY_UI, "preview" );
   public static final Key KEY_UI_PREVIEW_STYLESHEET = key( KEY_UI_PREVIEW, "stylesheet" );
   public static final Key KEY_LANGUAGE = key( KEY_ROOT, "language" );
   public static final Key KEY_LANGUAGE_LOCALE = key( KEY_LANGUAGE, "locale" );
   public static final Key KEY_TYPESET = key( KEY_ROOT, "typeset" );
   public static final Key KEY_TYPESET_CONTEXT = key( KEY_TYPESET, "context" );
   public static final Key KEY_TYPESET_CONTEXT_FONTS = key( KEY_TYPESET_CONTEXT, "fonts" );
   public static final Key KEY_TYPESET_CONTEXT_FONTS_DIR = key( KEY_TYPESET_CONTEXT_FONTS, "dir" );
   public static final Key KEY_TYPESET_CONTEXT_THEMES = key( KEY_TYPESET_CONTEXT, "themes" );
   public static final Key KEY_TYPESET_CONTEXT_THEMES_PATH = key( KEY_TYPESET_CONTEXT_THEMES, "path" );
   public static final Key KEY_TYPESET_CONTEXT_THEME_SELECTION = key( KEY_TYPESET_CONTEXT_THEMES, "selection" );
   public static final Key KEY_TYPESET_CONTEXT_CLEAN = key( KEY_TYPESET_CONTEXT, "clean" );
   public static final Key KEY_TYPESET_CONTEXT_CHAPTERS = key( KEY_TYPESET_CONTEXT, "chapters" );
   public static final Key KEY_TYPESET_TYPOGRAPHY = key( KEY_TYPESET, "typography" );
   public static final Key KEY_TYPESET_TYPOGRAPHY_QUOTES = key( KEY_TYPESET_TYPOGRAPHY, "quotes" );
   //@formatter:on
   /**
    * Only for constants, do not instantiate.
    */
   private AppKeys() { }
+}

A src/main/java/com/keenwrite/preferences/FileProperty.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import javafx.beans.property.SimpleObjectProperty;
 import java.io.File;
 public final class FileProperty extends SimpleObjectProperty<File> {
   public FileProperty( final File file ) {
     super( file );
+  }
   public void setValue( final String filename ) {
     setValue( new File( filename ) );
+  }
+}

A src/main/java/com/keenwrite/preferences/Key.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import java.util.Stack;
 import java.util.function.Consumer;
 /**
  * Responsible for creating a type hierarchy of preference storage keys.
  */
 public class Key {
   private final Key mParent;
   private final String mName;
   /**
    * Returns a new key with no parent.
+   *
    * @param name The key name, never {@code null}.
    * @return The new {@link Key} instance with a name but no parent.
    */
   public static Key key( final String name ) {
     return key( null, name );
+  }
   /**
    * Returns a new key with a given parent.
+   *
    * @param parent The parent of this {@link Key}, or {@code null} if this is
    *               the topmost key in the chain.
    * @param name   The key name, never {@code null}.
    * @return The new {@link Key} instance with a name and parent.
    */
   public static Key key( final Key parent, final String name ) {
     return new Key( parent, name );
+  }
   private Key( final Key parent, final String name ) {
     assert name != null;
     assert !name.isBlank();
     mParent = parent;
     mName = name;
+  }
   /**
    * Answers whether more {@link Key}s exist above this one in the hierarchy.
+   *
    * @return {@code true} means this {@link Key} has a parent {@link Key}.
    */
   public boolean hasParent() {
     return mParent != null;
+  }
   /**
    * Visits every key in the hierarchy, starting at the topmost {@link Key} and
    * ending with the current {@link Key}.
+   *
    * @param consumer  Receives the name of each visited node.
    * @param separator Characters to insert between each node.
    */
   public void walk( final Consumer<String> consumer, final String separator ) {
     var key = this;
     final var stack = new Stack<String>();
     while( key != null ) {
       stack.push( key.name() );
       key = key.parent();
+    }
     var sep = "";
     while( !stack.empty() ) {
       consumer.accept( sep + stack.pop() );
       sep = separator;
+    }
+  }
   public void walk( final Consumer<String> consumer ) {
     walk( consumer, "" );
+  }
   public Key parent() {
     return mParent;
+  }
   public String name() {
     return mName;
+  }
   /**
    * Returns a dot-separated path representing the key's name.
+   *
    * @return The dot-separated key name.
    */
   @Override
   public String toString() {
     final var sb = new StringBuilder( 128 );
     walk( sb::append, "." );
     return sb.toString();
+  }
+}

A src/main/java/com/keenwrite/preferences/LocaleProperty.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.collections.ObservableList;
 import java.util.LinkedHashMap;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import static com.keenwrite.constants.Constants.LOCALE_DEFAULT;
 import static com.keenwrite.preferences.Workspace.listProperty;
 import static java.util.Locale.forLanguageTag;
 /**
  * Responsible for providing a list of locales from which the user may pick.
  */
 public final class LocaleProperty extends SimpleObjectProperty<String> {
   /**
    * The {@link Locale}s are used for multiple purposes, including:
+   *
    * <ul>
    *   <li>supported text editor font listing in preferences dialog;</li>
    *   <li>text editor CSS;</li>
    *   <li>preview window CSS; and</li>
    *   <li>lexicon to load for spellcheck.</li>
    * </ul>
+   *
    * When the Markdown and preview CSS files are loaded, a general file is
    * first loaded, then a specific file is loaded according to the locale.
    * The specific file overrides font families so that different languages
    * may be presented.
    * <p>
    * Using an instance of {@link LinkedHashMap} preserves display order.
    * </p>
    * <p>
    * See
    * <a href="https://www.oracle.com/java/technologies/javase/jdk19-suported-locales.html">
    * JDK 19 Supported Locales
    * </a> for details.
    * </p>
    */
   private static final Map<String, Locale> sLocales = new LinkedHashMap<>();
   static {
     @SuppressWarnings( "SpellCheckingInspection" )
     final String[] tags = {
       // English
       "en-Latn-AU",
       "en-Latn-CA",
       "en-Latn-GB",
       "en-Latn-NZ",
       "en-Latn-US",
       "en-Latn-ZA",
       // German
       "de-Latn-AT",
       "de-Latn-DE",
       "de-Latn-LU",
       "de-Latn-CH",
       // Spanish
       "es-Latn-AR",
       "es-Latn-BO",
       "es-Latn-CL",
       "es-Latn-CO",
       "es-Latn-CR",
       "es-Latn-DO",
       "es-Latn-EC",
       "es-Latn-SV",
       "es-Latn-GT",
       "es-Latn-HN",
       "es-Latn-MX",
       "es-Latn-NI",
       "es-Latn-PA",
       "es-Latn-PY",
       "es-Latn-PE",
       "es-Latn-PR",
       "es-Latn-ES",
       "es-Latn-US",
       "es-Latn-UY",
       "es-Latn-VE",
       // French
       "fr-Latn-BE",
       "fr-Latn-CA",
       "fr-Latn-FR",
       "fr-Latn-LU",
       "fr-Latn-CH",
       // Hebrew
       //"iw-Hebr-IL",
       // Italian
       "it-Latn-IT",
       "it-Latn-CH",
       // Japanese
       "ja-Jpan-JP",
       // Korean
       "ko-Kore-KR",
       // Chinese
       "zh-Hans-CN",
       "zh-Hans-SG",
       "zh-Hant-HK",
       "zh-Hant-TW",
     };
     for( final var tag : tags ) {
       final var locale = forLanguageTag( tag );
       sLocales.put( locale.getDisplayName(), locale );
+    }
+  }
   public LocaleProperty( final Locale locale ) {
     super( sanitize( locale ).getDisplayName() );
+  }
   public static String parseLocale( final String languageTag ) {
     final var locale = forLanguageTag( languageTag );
     final var key = getKey( sLocales, locale );
     return key == null ? LOCALE_DEFAULT.getDisplayName() : key;
+  }
   public static String toLanguageTag( final String displayName ) {
     return sLocales.getOrDefault( displayName, LOCALE_DEFAULT ).toLanguageTag();
+  }
   public Locale toLocale() {
     return sLocales.getOrDefault( getValue(), LOCALE_DEFAULT );
+  }
   private static Locale sanitize( final Locale locale ) {
     // If the language is undefined then use the default locale.
     return locale == null || "und".equalsIgnoreCase( locale.toLanguageTag() )
       ? LOCALE_DEFAULT
       : locale;
+  }
   public static ObservableList<String> localeListProperty() {
     return listProperty( sLocales.keySet() );
+  }
   /**
    * Performs an O(n) search through the given map to find the key that is
    * mapped to the given value. A bidirectional map would be faster, but
    * also introduces additional dependencies. This doesn't need to be fast
    * because it happens once, at start up, and there aren't a lot of values.
+   *
    * @param map   The map containing a key to find based on a value.
    * @param value The value to find within the map.
    * @param <K>   The type of key associated with a value.
    * @param <V>   The type of value associated with a key.
    * @return The key that corresponds to the given value, or {@code null} if
    * the key is not found.
    */
   @SuppressWarnings( "SameParameterValue" )
   private static <K, V> K getKey( final Map<K, V> map, final V value ) {
     for( final var entry : map.entrySet() ) {
       if( Objects.equals( value, entry.getValue() ) ) {
         return entry.getKey();
+      }
+    }
     return null;
+  }
+}

A src/main/java/com/keenwrite/preferences/LocaleScripts.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
 import static java.util.Arrays.asList;
 /**
  * Responsible for adding an ISO 15924 alpha-4 script code to {@link Locale}
  * instances. This allows all {@link Locale} objects to produce language tags
  * using the same format.
  */
 public final class LocaleScripts {
   /**
    * ISO 15924 alpha-4 script code to represent Latin scripts.
    */
   private static final String SCRIPT_LATIN = "Latn";
   /**
    * This value is returned when a script hasn't been mapped for an instance of
    * {@link Locale}.
    */
   private static final Map<String, String> SCRIPT_DEFAULT = m( SCRIPT_LATIN );
   private static final Map<String, Map<String, String>> SCRIPTS =
     new HashMap<>();
   static {
     put( "en", m( "Latn" ) );
     put( "jp", m( "Jpan" ) );
     put( "ko", m( "Kore" ) );
     put( "zh", m( "Hant" ), m( "Hans", "CN", "MN", "MY", "SG" ) );
+  }
   /**
    * Adds a script to a given {@link Locale} object. If the given {@link Locale}
    * already has a script, then it is returned unchanged.
+   *
    * @param locale The {@link Locale} to update with its associated script.
    * @return The given {@link Locale} with a script included.
    */
   public static Locale withScript( Locale locale ) {
     assert locale != null;
     final var script = locale.getScript();
     if( script == null || script.isBlank() ) {
       final var builder = new Locale.Builder();
       builder.setLocale( locale );
       builder.setScript( getScript( locale ) );
       locale = builder.build();
+    }
     return locale;
+  }
   @SafeVarargs
   private static void put(
     final String language, final Map<String, String>... scripts ) {
     final var merged = new HashMap<String, String>();
     asList( scripts ).forEach( merged::putAll );
     SCRIPTS.put( language, merged );
+  }
   /**
    * Returns the ISO 15924 alpha-4 script code for the given {@link Locale}.
+   *
    * @param locale Language and country are used to find the script code.
    * @return The ISO code for the given locale, or {@link #SCRIPT_LATIN} if
    * no code has been mapped yet.
    */
   private static String getScript( final Locale locale ) {
     return SCRIPTS.getOrDefault( locale.getLanguage(), SCRIPT_DEFAULT )
                   .getOrDefault( locale.getCountry(), SCRIPT_LATIN );
+  }
   /**
    * Helper method to instantiate a new {@link Map} having all keys referencing
    * the same value.
+   *
    * @param v The value to associate with each key.
    * @param k The keys to associate with the given value.
    * @return A new {@link Map} with all keys referencing the same value.
    */
   private static Map<String, String> m( final String v, final String... k ) {
     final var map = new HashMap<String, String>();
     asList( k ).forEach( key -> map.put( key, v ) );
     return Collections.unmodifiableMap( map );
+  }
   /**
    * Helper method to instantiate a new {@link Map} having an empty key
    * referencing the given value. This provides a default value so that
    * an unmapped country code can return a valid script code.
+   *
    * @param v The value to associate with an empty key.
    * @return A new {@link Map} with the empty key referencing the given value.
    */
   private static Map<String, String> m( final String v ) {
     return m( v, "" );
+  }
+}

A src/main/java/com/keenwrite/preferences/PreferencesController.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import com.dlsc.formsfx.model.structure.StringField;
 import com.dlsc.preferencesfx.PreferencesFx;
 import com.dlsc.preferencesfx.model.Category;
 import com.dlsc.preferencesfx.model.Group;
 import com.dlsc.preferencesfx.model.Setting;
 import com.dlsc.preferencesfx.util.StorageHandler;
 import com.dlsc.preferencesfx.view.NavigationView;
 import javafx.beans.property.*;
 import javafx.scene.Node;
 import javafx.scene.control.Button;
 import javafx.scene.control.DialogPane;
 import javafx.scene.control.Label;
 import org.controlsfx.control.MasterDetailPane;
 import java.io.File;
 import java.util.Map.Entry;
 import static com.dlsc.formsfx.model.structure.Field.ofStringType;
 import static com.dlsc.preferencesfx.PreferencesFxEvent.EVENT_PREFERENCES_SAVED;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.Constants.USER_DIRECTORY;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG;
 import static com.keenwrite.preferences.AppKeys.*;
 import static com.keenwrite.preferences.LocaleProperty.localeListProperty;
 import static com.keenwrite.preferences.SkinProperty.skinListProperty;
 import static com.keenwrite.preferences.TableField.ofListType;
 import static javafx.scene.control.ButtonType.CANCEL;
 import static javafx.scene.control.ButtonType.OK;
 /**
  * Provides the ability for users to configure their preferences. This links
  * the {@link Workspace} model with the {@link PreferencesFx} view, in MVC.
  */
 @SuppressWarnings( "SameParameterValue" )
 public final class PreferencesController {
   private final Workspace mWorkspace;
   private final PreferencesFx mPreferencesFx;
   public PreferencesController( final Workspace workspace ) {
     mWorkspace = workspace;
     // Order matters: set the workspace before creating the dialog.
     mPreferencesFx = createPreferencesFx();
     initKeyEventHandler( mPreferencesFx );
     initSaveEventHandler( mPreferencesFx );
+  }
   /**
    * Display the user preferences settings dialog (non-modal).
    */
   public void show() {
     mPreferencesFx.show( false );
+  }
   private StringField createFontNameField(
     final StringProperty fontName, final DoubleProperty fontSize ) {
     final var control = new SimpleFontControl( "Change" );
     control.fontSizeProperty().addListener( ( c, o, n ) -> {
       if( n != null ) {
         fontSize.set( n.doubleValue() );
+      }
     } );
     return ofStringType( fontName ).render( control );
+  }
   /**
    * Convenience method to create a helper class for the user interface. This
    * establishes a key-value pair for the view.
+   *
    * @param persist A reference to the values that will be persisted.
    * @param <K>     The type of key, usually a string.
    * @param <V>     The type of value, usually a string.
    * @return UI data model container that may update the persistent state.
    */
   private <K, V> TableField<Entry<K, V>> createTableField(
     final ListProperty<Entry<K, V>> persist ) {
     return ofListType( persist ).render( new SimpleTableControl<>() );
+  }
   /**
    * Creates the preferences dialog based using
    * {@link SkeletonStorageHandler} and
    * numerous {@link Category} objects.
+   *
    * @return A component for editing preferences.
    * @throws RuntimeException Could not construct the {@link PreferencesFx}
    *                          object (e.g., illegal access permissions,
    *                          unmapped XML resource).
    */
   private PreferencesFx createPreferencesFx() {
     return PreferencesFx.of( createStorageHandler(), createCategories() )
                         .instantPersistent( false )
                         .dialogIcon( ICON_DIALOG );
+  }
   /**
    * Override the {@link PreferencesFx} storage handler to perform no actions.
    * Persistence is accomplished using the {@link XmlStore}.
+   *
    * @return A no-op {@link StorageHandler} implementation.
    */
   private StorageHandler createStorageHandler() {
     return new SkeletonStorageHandler();
+  }
   private Category[] createCategories() {
     return new Category[]{
       Category.of(
         get( KEY_DOC ),
         Group.of(
           get( KEY_DOC_META ),
           Setting.of( label( KEY_DOC_META ) ),
           Setting.of( title( KEY_DOC_META ),
                       createTableField( listEntryProperty( KEY_DOC_META ) ),
                       listEntryProperty( KEY_DOC_META ) )
+        )
       ),
       Category.of(
         get( KEY_TYPESET ),
         Group.of(
           get( KEY_TYPESET_CONTEXT ),
           Setting.of( label( KEY_TYPESET_CONTEXT_THEMES_PATH ) ),
           Setting.of( title( KEY_TYPESET_CONTEXT_THEMES_PATH ),
                       directoryProperty( KEY_TYPESET_CONTEXT_THEMES_PATH ),
                       true ),
           Setting.of( label( KEY_TYPESET_CONTEXT_CLEAN ) ),
           Setting.of( title( KEY_TYPESET_CONTEXT_CLEAN ),
                       booleanProperty( KEY_TYPESET_CONTEXT_CLEAN ) )
         ),
         Group.of(
           get( KEY_TYPESET_CONTEXT_FONTS ),
           Setting.of( label( KEY_TYPESET_CONTEXT_FONTS_DIR ) ),
           Setting.of( title( KEY_TYPESET_CONTEXT_FONTS_DIR ),
                       directoryProperty( KEY_TYPESET_CONTEXT_FONTS_DIR ),
                       true )
         ),
         Group.of(
           get( KEY_TYPESET_TYPOGRAPHY ),
           Setting.of( label( KEY_TYPESET_TYPOGRAPHY_QUOTES ) ),
           Setting.of( title( KEY_TYPESET_TYPOGRAPHY_QUOTES ),
                       booleanProperty( KEY_TYPESET_TYPOGRAPHY_QUOTES ) )
+        )
       ),
       Category.of(
         get( KEY_EDITOR ),
         Group.of(
           get( KEY_EDITOR_AUTOSAVE ),
           Setting.of( label( KEY_EDITOR_AUTOSAVE ) ),
           Setting.of( title( KEY_EDITOR_AUTOSAVE ),
                       integerProperty( KEY_EDITOR_AUTOSAVE ) )
+        )
       ),
       Category.of(
         get( KEY_R ),
         Group.of(
           get( KEY_R_DIR ),
           Setting.of( label( KEY_R_DIR ) ),
           Setting.of( title( KEY_R_DIR ),
                       directoryProperty( KEY_R_DIR ),
                       true )
         ),
         Group.of(
           get( KEY_R_SCRIPT ),
           Setting.of( label( KEY_R_SCRIPT ) ),
           createMultilineSetting( "Script", KEY_R_SCRIPT )
         ),
         Group.of(
           get( KEY_R_DELIM_BEGAN ),
           Setting.of( label( KEY_R_DELIM_BEGAN ) ),
           Setting.of( title( KEY_R_DELIM_BEGAN ),
                       stringProperty( KEY_R_DELIM_BEGAN ) )
         ),
         Group.of(
           get( KEY_R_DELIM_ENDED ),
           Setting.of( label( KEY_R_DELIM_ENDED ) ),
           Setting.of( title( KEY_R_DELIM_ENDED ),
                       stringProperty( KEY_R_DELIM_ENDED ) )
+        )
       ),
       Category.of(
         get( KEY_IMAGES ),
         Group.of(
           get( KEY_IMAGES_DIR ),
           Setting.of( label( KEY_IMAGES_DIR ) ),
           Setting.of( title( KEY_IMAGES_DIR ),
                       directoryProperty( KEY_IMAGES_DIR ),
                       true ),
           Setting.of( label( KEY_CACHES_DIR ) ),
           Setting.of( title( KEY_CACHES_DIR ),
                       directoryProperty( KEY_CACHES_DIR ),
                       true )
         ),
         Group.of(
           get( KEY_IMAGES_ORDER ),
           Setting.of( label( KEY_IMAGES_ORDER ) ),
           Setting.of( title( KEY_IMAGES_ORDER ),
                       stringProperty( KEY_IMAGES_ORDER ) )
         ),
         Group.of(
           get( KEY_IMAGES_RESIZE ),
           Setting.of( label( KEY_IMAGES_RESIZE ) ),
           Setting.of( title( KEY_IMAGES_RESIZE ),
                       booleanProperty( KEY_IMAGES_RESIZE ) )
         ),
         Group.of(
           get( KEY_IMAGES_SERVER ),
           Setting.of( label( KEY_IMAGES_SERVER ) ),
           Setting.of( title( KEY_IMAGES_SERVER ),
                       stringProperty( KEY_IMAGES_SERVER ) )
+        )
       ),
       Category.of(
         get( KEY_DEF ),
         Group.of(
           get( KEY_DEF_PATH ),
           Setting.of( label( KEY_DEF_PATH ) ),
           Setting.of( title( KEY_DEF_PATH ),
                       fileProperty( KEY_DEF_PATH ), false )
         ),
         Group.of(
           get( KEY_DEF_DELIM_BEGAN ),
           Setting.of( label( KEY_DEF_DELIM_BEGAN ) ),
           Setting.of( title( KEY_DEF_DELIM_BEGAN ),
                       stringProperty( KEY_DEF_DELIM_BEGAN ) )
         ),
         Group.of(
           get( KEY_DEF_DELIM_ENDED ),
           Setting.of( label( KEY_DEF_DELIM_ENDED ) ),
           Setting.of( title( KEY_DEF_DELIM_ENDED ),
                       stringProperty( KEY_DEF_DELIM_ENDED ) )
+        )
       ),
       Category.of(
         get( KEY_UI_FONT ),
         Group.of(
           get( KEY_UI_FONT_EDITOR ),
           Setting.of( label( KEY_UI_FONT_EDITOR_NAME ) ),
           Setting.of( title( KEY_UI_FONT_EDITOR_NAME ),
                       createFontNameField(
                         stringProperty( KEY_UI_FONT_EDITOR_NAME ),
                         doubleProperty( KEY_UI_FONT_EDITOR_SIZE ) ),
                       stringProperty( KEY_UI_FONT_EDITOR_NAME ) ),
           Setting.of( label( KEY_UI_FONT_EDITOR_SIZE ) ),
           Setting.of( title( KEY_UI_FONT_EDITOR_SIZE ),
                       doubleProperty( KEY_UI_FONT_EDITOR_SIZE ) )
         ),
         Group.of(
           get( KEY_UI_FONT_PREVIEW ),
           Setting.of( label( KEY_UI_FONT_PREVIEW_NAME ) ),
           Setting.of( title( KEY_UI_FONT_PREVIEW_NAME ),
                       createFontNameField(
                         stringProperty( KEY_UI_FONT_PREVIEW_NAME ),
                         doubleProperty( KEY_UI_FONT_PREVIEW_SIZE ) ),
                       stringProperty( KEY_UI_FONT_PREVIEW_NAME ) ),
           Setting.of( label( KEY_UI_FONT_PREVIEW_SIZE ) ),
           Setting.of( title( KEY_UI_FONT_PREVIEW_SIZE ),
                       doubleProperty( KEY_UI_FONT_PREVIEW_SIZE ) ),
           Setting.of( label( KEY_UI_FONT_PREVIEW_MONO_NAME ) ),
           Setting.of( title( KEY_UI_FONT_PREVIEW_MONO_NAME ),
                       createFontNameField(
                         stringProperty( KEY_UI_FONT_PREVIEW_MONO_NAME ),
                         doubleProperty( KEY_UI_FONT_PREVIEW_MONO_SIZE ) ),
                       stringProperty( KEY_UI_FONT_PREVIEW_MONO_NAME ) ),
           Setting.of( label( KEY_UI_FONT_PREVIEW_MONO_SIZE ) ),
           Setting.of( title( KEY_UI_FONT_PREVIEW_MONO_SIZE ),
                       doubleProperty( KEY_UI_FONT_PREVIEW_MONO_SIZE ) )
         ),
         Group.of(
           get( KEY_UI_FONT_MATH ),
           Setting.of( title( KEY_UI_FONT_MATH_SIZE ),
                       doubleProperty( KEY_UI_FONT_MATH_SIZE ) )
+        )
       ),
       Category.of(
         get( KEY_UI_SKIN ),
         Group.of(
           get( KEY_UI_SKIN_SELECTION ),
           Setting.of( label( KEY_UI_SKIN_SELECTION ) ),
           Setting.of( title( KEY_UI_SKIN_SELECTION ),
                       skinListProperty(),
                       skinProperty( KEY_UI_SKIN_SELECTION ) )
         ),
         Group.of(
           get( KEY_UI_SKIN_CUSTOM ),
           Setting.of( label( KEY_UI_SKIN_CUSTOM ) ),
           Setting.of( title( KEY_UI_SKIN_CUSTOM ),
                       fileProperty( KEY_UI_SKIN_CUSTOM ), false )
+        )
       ),
       Category.of(
         get( KEY_UI_PREVIEW ),
         Group.of(
           get( KEY_UI_PREVIEW_STYLESHEET ),
           Setting.of( label( KEY_UI_PREVIEW_STYLESHEET ) ),
           Setting.of( title( KEY_UI_PREVIEW_STYLESHEET ),
                       fileProperty( KEY_UI_PREVIEW_STYLESHEET ), false )
+        )
       ),
       Category.of(
         get( KEY_LANGUAGE ),
         Group.of(
           get( KEY_LANGUAGE_LOCALE ),
           Setting.of( label( KEY_LANGUAGE_LOCALE ) ),
           Setting.of( title( KEY_LANGUAGE_LOCALE ),
                       localeListProperty(),
                       localeProperty( KEY_LANGUAGE_LOCALE ) )
+        )
+      )
     };
+  }
   @SuppressWarnings( "unchecked" )
   private Setting<StringField, StringProperty> createMultilineSetting(
     final String description, final Key property ) {
     final Setting<StringField, StringProperty> setting =
       Setting.of( description, stringProperty( property ) );
     final var field = setting.getElement();
     field.multiline( true );
     return setting;
+  }
   /**
    * Map ENTER and ESCAPE keys to OK and CANCEL buttons, respectively.
    */
   private void initKeyEventHandler( final PreferencesFx preferences ) {
     final var view = preferences.getView();
     final var nodes = view.getChildrenUnmodifiable();
     final var master = (MasterDetailPane) nodes.get( 0 );
     final var detail = (NavigationView) master.getDetailNode();
     final var pane = (DialogPane) view.getParent();
     detail.setOnKeyReleased( key -> {
       switch( key.getCode() ) {
         case ENTER -> ((Button) pane.lookupButton( OK )).fire();
         case ESCAPE -> ((Button) pane.lookupButton( CANCEL )).fire();
+      }
     } );
+  }
   /**
    * Called when the user clicks the APPLY or OK buttons in the dialog.
+   *
    * @param preferences Preferences widget.
    */
   private void initSaveEventHandler( final PreferencesFx preferences ) {
     preferences.addEventHandler(
       EVENT_PREFERENCES_SAVED, event -> mWorkspace.save()
     );
+  }
   /**
    * Creates a label for the given key after interpolating its value.
+   *
    * @param key The key to find in the resource bundle.
    * @return The value of the key as a label.
    */
   private Node label( final Key key ) {
     return label( key, (String[]) null );
+  }
   private Node label( final Key key, final String... values ) {
     return new Label( get( key.toString() + ".desc", (Object[]) values ) );
+  }
   private String title( final Key key ) {
     return get( key.toString() + ".title" );
+  }
   /**
    * Screens out non-existent directories to avoid throwing an exception caused
    * by
    * <a href="https://github.com/dlsc-software-consulting-gmbh/PreferencesFX/issues/441">
    * PreferencesFX issue #441
    * </a>.
+   *
    * @param key Preference to pre-screen before creating a {@link FileProperty}.
    * @return The preferred value or the user's home directory if the directory
    * does not exist.
    */
   private ObjectProperty<File> directoryProperty( final Key key ) {
     final var property = mWorkspace.fileProperty( key );
     final var file = property.get();
     if( !file.exists() ) {
       property.set( USER_DIRECTORY );
+    }
     return property;
+  }
   private ObjectProperty<File> fileProperty( final Key key ) {
     return mWorkspace.fileProperty( key );
+  }
   private StringProperty stringProperty( final Key key ) {
     return mWorkspace.stringProperty( key );
+  }
   private BooleanProperty booleanProperty( final Key key ) {
     return mWorkspace.booleanProperty( key );
+  }
   private IntegerProperty integerProperty( final Key key ) {
     return mWorkspace.integerProperty( key );
+  }
   private DoubleProperty doubleProperty( final Key key ) {
     return mWorkspace.doubleProperty( key );
+  }
   private ObjectProperty<String> skinProperty( final Key key ) {
     return mWorkspace.skinProperty( key );
+  }
   private ObjectProperty<String> localeProperty( final Key key ) {
     return mWorkspace.localeProperty( key );
+  }
   private <K, V> ListProperty<Entry<K, V>> listEntryProperty( final Key key ) {
     return mWorkspace.listsProperty( key );
+  }
+}

A src/main/java/com/keenwrite/preferences/SimpleFontControl.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import com.dlsc.formsfx.model.structure.StringField;
 import com.dlsc.preferencesfx.formsfx.view.controls.SimpleControl;
 import javafx.beans.property.DoubleProperty;
 import javafx.beans.property.SimpleDoubleProperty;
 import javafx.scene.control.Button;
 import javafx.scene.control.ListView;
 import javafx.scene.control.TextField;
 import javafx.scene.input.KeyEvent;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Region;
 import javafx.scene.layout.StackPane;
 import javafx.scene.text.Font;
 import javafx.stage.Stage;
 import org.controlsfx.dialog.FontSelectorDialog;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG;
 import static com.keenwrite.events.StatusEvent.clue;
 import static java.lang.System.currentTimeMillis;
 import static javafx.geometry.Pos.CENTER_LEFT;
 import static javafx.scene.control.ButtonType.CANCEL;
 import static javafx.scene.control.ButtonType.OK;
 import static javafx.scene.input.KeyCode.ENTER;
 import static javafx.scene.input.KeyCode.ESCAPE;
 import static javafx.scene.layout.Priority.ALWAYS;
 import static javafx.scene.text.Font.font;
 import static javafx.scene.text.Font.getDefault;
 /**
  * Responsible for provide users the ability to select a font using a friendly
  * font dialog.
  */
 public class SimpleFontControl extends SimpleControl<StringField, StackPane> {
   private final Button mButton = new Button();
   private final String mButtonText;
   private final DoubleProperty mFontSize = new SimpleDoubleProperty();
   private final TextField mFontName = new TextField();
   public SimpleFontControl( final String buttonText ) {
     mButtonText = buttonText;
+  }
   @Override
   public void initializeParts() {
     super.initializeParts();
     mFontName.setText( field.getValue() );
     mFontName.setPromptText( field.placeholderProperty().getValue() );
     final var fieldProperty = field.valueProperty();
     if( fieldProperty.get().equals( "null" ) ) {
       fieldProperty.set( "" );
+    }
     mButton.setText( mButtonText );
     mButton.setOnAction( event -> {
       final var selected = !fieldProperty.get().trim().isEmpty();
       var initialFont = getDefault();
       if( selected ) {
         final var previousValue = fieldProperty.get();
         initialFont = font( previousValue );
+      }
       createFontSelectorDialog( initialFont )
         .showAndWait()
         .ifPresent( font -> {
           mFontName.setText( font.getFamily() );
           mFontSize.set( font.getSize() );
         } );
     } );
     node = new StackPane();
+  }
   @Override
   public void layoutParts() {
     node.getStyleClass().add( "simple-text-control" );
     fieldLabel.getStyleClass().addAll( field.getStyleClass() );
     fieldLabel.getStyleClass().add( "read-only-label" );
     final var box = new HBox();
     HBox.setHgrow( mFontName, ALWAYS );
     box.setAlignment( CENTER_LEFT );
     box.getChildren().addAll( fieldLabel, mFontName, mButton );
     node.getChildren().add( box );
+  }
   @Override
   public void setupBindings() {
     super.setupBindings();
     mFontName.textProperty().bindBidirectional( field.userInputProperty() );
+  }
   public DoubleProperty fontSizeProperty() {
     return mFontSize;
+  }
   /**
    * Creates a dialog that displays a list of available font families,
    * sizes, and a button for font selection.
+   *
    * @param font The default font to select initially.
    * @return A dialog to help the user select a different {@link Font}.
    */
   private FontSelectorDialog createFontSelectorDialog( final Font font ) {
     final var dialog = new FontSelectorDialog( font );
     final var pane = dialog.getDialogPane();
     final var buttonOk = (Button) pane.lookupButton( OK );
     final var buttonCancel = (Button) pane.lookupButton( CANCEL );
     buttonOk.setDefaultButton( true );
     buttonCancel.setCancelButton( true );
     pane.setOnKeyReleased( keyEvent -> {
       switch( keyEvent.getCode() ) {
         case ENTER -> buttonOk.fire();
         case ESCAPE -> buttonCancel.fire();
+      }
     } );
     final var stage = (Stage) pane.getScene().getWindow();
     stage.getIcons().add( ICON_DIALOG );
     final var frontPanel = (Region) pane.getContent();
     for( final var node : frontPanel.getChildrenUnmodifiable() ) {
       if( node instanceof final ListView<?> listView ) {
         final var handler = new ListViewHandler<>( listView );
         listView.setOnKeyPressed( handler::handle );
+      }
+    }
     return dialog;
+  }
   /**
    * Responsible for handling key presses when selecting a font. Based on
    * <a href="https://stackoverflow.com/a/43604223/59087">Martin Široký</a>'s
    * answer.
+   *
    * @param <T> The type of {@link ListView} to search.
    */
   private static final class ListViewHandler<T> {
     /**
      * Amount of time to wait between key presses that typing a subsequent
      * key is considered part of the same search, in milliseconds.
      */
     private static final int RESET_DELAY_MS = 1250;
     private String mNeedle = "";
     private int mSearchSkip = 0;
     private long mLastTyped = currentTimeMillis();
     private final ListView<T> mHaystack;
     private ListViewHandler( final ListView<T> listView ) {
       mHaystack = listView;
+    }
     private void handle( final KeyEvent key ) {
       var ch = key.getText();
       final var code = key.getCode();
       if( ch == null || ch.isEmpty() || code == ESCAPE || code == ENTER ) {
         return;
+      }
       ch = ch.toUpperCase();
       if( mNeedle.equals( ch ) ) {
         mSearchSkip++;
+      }
       else {
         mNeedle = currentTimeMillis() - mLastTyped > RESET_DELAY_MS
           ? ch : mNeedle + ch;
+      }
       mLastTyped = currentTimeMillis();
       boolean found = false;
       int skipped = 0;
       for( final T item : mHaystack.getItems() ) {
         final var straw = item.toString().toUpperCase();
         if( straw.startsWith( mNeedle ) ) {
           if( mSearchSkip > skipped ) {
             skipped++;
             continue;
+          }
           mHaystack.getSelectionModel().select( item );
           final int index = mHaystack.getSelectionModel().getSelectedIndex();
           mHaystack.getFocusModel().focus( index );
           mHaystack.scrollTo( index );
           found = true;
           break;
+        }
+      }
       if( !found ) {
         clue( "Main.status.font.search.missing", mNeedle );
         mSearchSkip = 0;
+      }
+    }
+  }
+}

A src/main/java/com/keenwrite/preferences/SimpleTableControl.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import com.dlsc.preferencesfx.formsfx.view.controls.SimpleControl;
 import com.keenwrite.ui.cells.AltTableCell;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.event.ActionEvent;
 import javafx.event.EventHandler;
 import javafx.geometry.Insets;
 import javafx.scene.control.Button;
 import javafx.scene.control.ButtonBar;
 import javafx.scene.control.TableColumn;
 import javafx.scene.control.TableColumn.CellEditEvent;
 import javafx.scene.control.TableView;
 import javafx.scene.layout.VBox;
 import javafx.util.StringConverter;
 import java.util.AbstractMap.SimpleEntry;
 import java.util.ArrayList;
 import java.util.Map.Entry;
 import java.util.function.BiFunction;
 import java.util.function.Function;
 import static com.keenwrite.ui.fonts.IconFactory.createGraphic;
 import static java.util.Arrays.asList;
 import static javafx.scene.control.SelectionMode.MULTIPLE;
 import static javafx.scene.control.TableView.CONSTRAINED_RESIZE_POLICY;
 public class SimpleTableControl<K, V, F extends TableField<Entry<K, V>>>
   extends SimpleControl<F, VBox> {
   private static long sCounter;
   public SimpleTableControl() {}
   @Override
   public void initializeParts() {
     super.initializeParts();
     final var model = field.viewProperty();
     final var table = new TableView<>( model );
     table.setColumnResizePolicy( CONSTRAINED_RESIZE_POLICY );
     table.setEditable( true );
     table.getColumns().addAll(
       asList(
         createEditableColumnKey( table ),
         createEditableColumnValue( table )
+      )
     );
     table.getSelectionModel().setSelectionMode( MULTIPLE );
     final var buttons = new ButtonBar();
     buttons.getButtons().addAll(
       createButton(
         "Add", "PLUS",
         event -> {
           sCounter++;
           model.add( createEntry( "key" + sCounter, "value" + sCounter ) );
+        }
       ),
       createButton(
         "Delete", "TRASH",
         event -> {
           final var selectionModel = table.getSelectionModel();
           final var selection = selectionModel.getSelectedItems();
           if( selection != null && !selection.isEmpty() ) {
             final var items = table.getItems();
             final var rows = new ArrayList<>( selection );
             rows.forEach( items::remove );
             selectionModel.clearSelection();
+          }
+        }
+      )
     );
     final var vbox = new VBox();
     vbox.setSpacing( 5 );
     vbox.setPadding( new Insets( 10, 0, 0, 10 ) );
     vbox.getChildren().addAll( table, buttons );
     super.node = vbox;
+  }
   @SuppressWarnings( "unchecked" )
   private Entry<K, V> createEntry( final String k, final String v ) {
     return new SimpleEntry<>( (K) k, (V) v );
+  }
   private Button createButton(
     final String label,
     final String graphic,
     final EventHandler<ActionEvent> handler ) {
     assert label != null;
     assert !label.isBlank();
     assert graphic != null;
     assert !graphic.isBlank();
     assert handler != null;
     final var button = new Button( label, createGraphic( graphic ) );
     button.setOnAction( handler );
     return button;
+  }
   private TableColumn<Entry<K, V>, K> createEditableColumnKey(
     final TableView<Entry<K, V>> table ) {
     return createColumn(
       table,
       Entry::getKey,
       ( e, o ) -> new SimpleEntry<>( e.getNewValue(), o.getValue() ),
       "Key",
       .2
     );
+  }
   private TableColumn<Entry<K, V>, V> createEditableColumnValue(
     final TableView<Entry<K, V>> table ) {
     return createColumn(
       table,
       Entry::getValue,
       ( e, o ) -> new SimpleEntry<>( o.getKey(), e.getNewValue() ),
       "Value",
       .8
     );
+  }
   /**
    * Creates a table column having cells that be edited.
+   *
    * @param table    The table to which the column belongs.
    * @param mapEntry Data model backing the edited text.
    * @param label    Column name.
    * @param width    Fraction of table width (1 = 100%).
    * @param <T>      The return type for the column (i.e., key or value).
    * @return The newly configured column.
    */
   private <T, E extends Entry<K, V>> TableColumn<E, T> createColumn(
     final TableView<E> table,
     final Function<E, T> mapEntry,
     final BiFunction<CellEditEvent<E, T>, E, E> creator,
     final String label,
     final double width
   ) {
     final var column = new TableColumn<E, T>( label );
     column.setEditable( true );
     column.setResizable( true );
     column.prefWidthProperty().bind( table.widthProperty().multiply( width ) );
     column.setOnEditCommit( event -> {
       final var index = event.getTablePosition().getRow();
       final var view = event.getTableView();
       final var old = view.getItems().get( index );
       // Update the data model with the new column value.
       view.getItems().set( index, creator.apply( event, old ) );
     } );
     column.setCellValueFactory(
       cellData ->
         new SimpleObjectProperty<>( mapEntry.apply( cellData.getValue() ) )
     );
     column.setCellFactory(
       tableColumn -> new AltTableCell<>(
         new StringConverter<>() {
           @Override
           public String toString( final T object ) {
             return object.toString();
+          }
           @Override
           @SuppressWarnings( "unchecked" )
           public T fromString( final String string ) {
             return (T) string;
+          }
+        }
+      )
     );
     return column;
+  }
   /**
    * Calling {@link #initializeParts()} also performs layout because no handles
    * are kept to the widgets after initialization.
    */
   @Override
   public void layoutParts() {}
+}

A src/main/java/com/keenwrite/preferences/SkeletonStorageHandler.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import com.dlsc.preferencesfx.PreferencesFx;
 import com.dlsc.preferencesfx.util.StorageHandler;
 import javafx.collections.ObservableList;
 import java.util.prefs.Preferences;
 /**
  * Prevents {@link PreferencesFx} from saving. Saving and loading preferences
  * and application window state is accomplished by the {@link Workspace}. This
  * is required to change the user preferences file location and data format.
+ *
  * @see XmlStore
  * @see Workspace
  */
 public final class SkeletonStorageHandler implements StorageHandler {
   @Override
   public void saveSelectedCategory( final String breadcrumb ) {}
   @Override
   public String loadSelectedCategory() {
     return "";
+  }
   @Override
   public void saveDividerPosition( final double dividerPosition ) {}
   @Override
   public double loadDividerPosition() {
     return 0;
+  }
   @Override
   public void saveWindowWidth( final double windowWidth ) {}
   @Override
   public double loadWindowWidth() {
     return 0;
+  }
   @Override
   public void saveWindowHeight( final double windowHeight ) {}
   @Override
   public double loadWindowHeight() {
     return 0;
+  }
   @Override
   public void saveWindowPosX( final double windowPosX ) {}
   @Override
   public double loadWindowPosX() {
     return 0;
+  }
   @Override
   public void saveWindowPosY( final double windowPosY ) {}
   @Override
   public double loadWindowPosY() {
     return 0;
+  }
   @Override
   public void saveObject( final String breadcrumb, final Object object ) {}
   @Override
   public Object loadObject(
     final String breadcrumb, final Object defaultObject ) {
     return defaultObject;
+  }
   @Override
   public <T> T loadObject(
     final String breadcrumb, final Class<T> type, final T defaultObject ) {
     return defaultObject;
+  }
   @Override
   @SuppressWarnings( "rawtypes" )
   public ObservableList loadObservableList(
     final String breadcrumb, final ObservableList defaultObservableList ) {
     return defaultObservableList;
+  }
   @Override
   public <T> ObservableList<T> loadObservableList(
     final String breadcrumb,
     final Class<T> type,
     final ObservableList<T> defaultObservableList ) {
     return defaultObservableList;
+  }
   @Override
   public boolean clearPreferences() {
     return false;
+  }
   @Override
   public Preferences getPreferences() {
     return null;
+  }
+}

A src/main/java/com/keenwrite/preferences/SkinProperty.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import com.keenwrite.constants.Constants;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.collections.ObservableList;
 import java.util.LinkedHashSet;
 import java.util.Set;
 import static com.keenwrite.constants.Constants.SKIN_DEFAULT;
 import static com.keenwrite.preferences.Workspace.listProperty;
 /**
  * Maintains a list of look and feels that the user may choose.
  */
 public final class SkinProperty extends SimpleObjectProperty<String> {
   /**
    * Ordered set of available skins.
    */
   private static final Set<String> sSkins = new LinkedHashSet<>();
   static {
     sSkins.add( "Count Darcula" );
     sSkins.add( "Haunted Grey" );
     sSkins.add( "Modena Dark" );
     sSkins.add( "Monokai" );
     sSkins.add( SKIN_DEFAULT );
     sSkins.add( "Silver Cavern" );
     sSkins.add( "Solarized Dark" );
     sSkins.add( "Vampire Byte" );
+  }
   /**
    * Returns the list of available skin names to change the UI fonts and
    * colours.
+   *
    * @return A selection of skins.
    */
   public static ObservableList<String> skinListProperty() {
     assert !sSkins.isEmpty();
     return listProperty( sSkins );
+  }
   /**
    * Returns the given skin name as a sanitized file name, which must map
    * to a stylesheet file bundled with the application. This does not include
    * the path to the stylesheet. If the given name is not known, the file
    * name for {@link Constants#SKIN_DEFAULT} is returned. The extension must
    * be added separately.
+   *
    * @param skin The name to convert to a file name.
    * @return The given name converted lower case, spaces replaced with
    * underscores, without the ".css" extension appended.
    */
   public static String toFilename( final String skin ) {
     assert skin != null;
     return sanitize( skin ).toLowerCase().replace( ' ', '_' );
+  }
   /**
    * Ensures that the given name is in the list of known skins.
+   *
    * @param skin Validate this name's existence.
    * @return The given name, if valid, otherwise the default skin.
    */
   private static String sanitize( final String skin ) {
     assert skin != null;
     return sSkins.contains( skin ) ? skin : SKIN_DEFAULT;
+  }
   public SkinProperty( final String skin ) {
     super( skin );
+  }
+}

A src/main/java/com/keenwrite/preferences/TableField.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import com.dlsc.formsfx.model.structure.Field;
 import com.dlsc.formsfx.model.util.BindingMode;
 import javafx.beans.property.ListProperty;
 import javafx.beans.property.Property;
 import javafx.beans.property.SimpleListProperty;
 import java.util.ArrayList;
 import static com.dlsc.formsfx.model.util.BindingMode.CONTINUOUS;
 import static javafx.collections.FXCollections.observableList;
 /**
  * Responsible for binding a form field to a map of values that, ultimately,
  * users may edit.
+ *
  * @param <P> The type of {@link Property} to store in the list.
  */
 public class TableField<P> extends Field<TableField<P>> {
   /**
    * Create a writeable list as the data model.
    */
   private final ListProperty<P> mViewProperty = new SimpleListProperty<>(
     observableList( new ArrayList<>() )
   );
   /**
    * Contains the data model entries to persist.
    */
   private final ListProperty<P> mSaveProperty;
   /**
    * Creates a new {@link TableField} with a reference to the list that is to
    * be persisted.
+   *
    * @param persist A list of items that will be persisted.
    * @param <P>     The type of elements in the list to persist.
    * @return A new {@link TableField} used to help render a UI widget.
    */
   public static <P> TableField<P> ofListType( final ListProperty<P> persist ) {
     return new TableField<>( persist );
+  }
   private TableField( final ListProperty<P> property ) {
     mSaveProperty = property;
+  }
   /**
    * Returns the data model that seeds the user interface. At any point the
    * user may cancel editing, which will revert to the previously persisted
    * set.
+   *
    * @return The source for values displayed in the UI.
    */
   public ListProperty<P> viewProperty() {
     return mViewProperty;
+  }
   /**
    * Called when a new UI instance is opened.
+   *
    * @param bindingMode Indicates how the view data model is bound to the
    *                    persistence data model.
    */
   @Override
   public void setBindingMode( final BindingMode bindingMode ) {
     if( CONTINUOUS.equals( bindingMode ) ) {
       mViewProperty.addAll( mSaveProperty );
+    }
+  }
   /**
    * Answers whether the user input is valid.
+   *
    * @return {@code true} Users may provide any key or value strings.
    */
   @Override
   protected boolean validate() {
     return true;
+  }
   /**
    * Update the properties to save by copying the properties updated in the
    * user interface (i.e., the view). To be clear, the properties are not
    * persisted after calling this method, merely moved out of the UI data
    * model and into the to-be-saved data model.
    */
   @Override
   public void persist() {
     mSaveProperty.clear();
     mSaveProperty.addAll( mViewProperty );
+  }
   /**
    * The {@link TableField} doesn't bind values, as such the reset can be
    * a no-op because only {@link #persist()} will update the properties to
    * save.
    */
   @Override
   public void reset() {}
+}

A src/main/java/com/keenwrite/preferences/Workspace.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preferences;
 import com.keenwrite.events.workspace.WorkspaceLoadedEvent;
 import javafx.application.Platform;
 import javafx.beans.property.*;
 import javafx.collections.ObservableList;
 import java.io.File;
 import java.nio.file.Path;
 import java.util.*;
 import java.util.Map.Entry;
 import java.util.function.BooleanSupplier;
 import java.util.function.Function;
 import static com.keenwrite.Bootstrap.*;
 import static com.keenwrite.Launcher.getVersion;
 import static com.keenwrite.constants.Constants.*;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preferences.AppKeys.*;
 import static java.util.Map.entry;
 import static javafx.application.Platform.runLater;
 import static javafx.collections.FXCollections.observableArrayList;
 import static javafx.collections.FXCollections.observableSet;
 /**
  * Responsible for defining behaviours for separate projects. A workspace has
  * the ability to save and restore a session, including the window dimensions,
  * tab setup, files, and user preferences.
  * <p>
  * The configuration must support hierarchical (nested) configuration nodes
  * to persist the user interface state. Although possible with a flat
  * configuration file, it's not nearly as simple or elegant.
  * </p>
  * <p>
  * Neither JSON nor HOCON support schema validation and versioning, which makes
  * XML the more suitable configuration file format. Schema validation and
  * versioning provide future-proofing and ease of reading and upgrading previous
  * versions of the configuration file.
  * </p>
  * <p>
  * Persistent preferences may be set directly by the user or indirectly by
  * the act of using the application.
  * </p>
  * <p>
  * Note the following definitions:
  * </p>
  * <dl>
  *   <dt>File</dt>
  *   <dd>References a file name (no path), path, or directory.</dd>
  *   <dt>Path</dt>
  *   <dd>Fully qualified file name, which includes all parent directories.</dd>
  *   <dt>Dir</dt>
  *   <dd>Directory without file name ({@link File#isDirectory()} is true).</dd>
  * </dl>
  */
 public final class Workspace {
   /**
    * Main configuration values, single text strings.
    */
   private final Map<Key, Property<?>> mValues = Map.ofEntries(
     entry( KEY_META_VERSION, asStringProperty( getVersion() ) ),
     entry( KEY_META_NAME, asStringProperty( "default" ) ),
     entry( KEY_EDITOR_AUTOSAVE, asIntegerProperty( 30 ) ),
     entry( KEY_R_SCRIPT, asStringProperty( "" ) ),
     entry( KEY_R_DIR, asFileProperty( USER_DIRECTORY ) ),
     entry( KEY_R_DELIM_BEGAN, asStringProperty( R_DELIM_BEGAN_DEFAULT ) ),
     entry( KEY_R_DELIM_ENDED, asStringProperty( R_DELIM_ENDED_DEFAULT ) ),
     entry( KEY_CACHES_DIR, asFileProperty( USER_CACHE_DIR ) ),
     entry( KEY_IMAGES_DIR, asFileProperty( USER_DIRECTORY ) ),
     entry( KEY_IMAGES_ORDER, asStringProperty( PERSIST_IMAGES_DEFAULT ) ),
     entry( KEY_IMAGES_RESIZE, asBooleanProperty( true ) ),
     entry( KEY_IMAGES_SERVER, asStringProperty( DIAGRAM_SERVER_NAME ) ),
     entry( KEY_DEF_PATH, asFileProperty( DEFINITION_DEFAULT ) ),
     entry( KEY_DEF_DELIM_BEGAN, asStringProperty( DEF_DELIM_BEGAN_DEFAULT ) ),
     entry( KEY_DEF_DELIM_ENDED, asStringProperty( DEF_DELIM_ENDED_DEFAULT ) ),
     entry( KEY_UI_RECENT_DIR, asFileProperty( USER_DIRECTORY ) ),
     entry( KEY_UI_RECENT_OFFSET, asIntegerProperty( DOCUMENT_OFFSET ) ),
     entry( KEY_UI_RECENT_DOCUMENT, asFileProperty( DOCUMENT_DEFAULT ) ),
     entry( KEY_UI_RECENT_DEFINITION, asFileProperty( DEFINITION_DEFAULT ) ),
     entry( KEY_UI_RECENT_EXPORT, asFileProperty( PDF_DEFAULT ) ),
     //@formatter:off
     entry(
       KEY_UI_FONT_EDITOR_NAME,
       asStringProperty( FONT_NAME_EDITOR_DEFAULT )
     ),
     entry(
      KEY_UI_FONT_EDITOR_SIZE,
      asDoubleProperty( FONT_SIZE_EDITOR_DEFAULT )
     ),
     entry(
      KEY_UI_FONT_PREVIEW_NAME,
      asStringProperty( FONT_NAME_PREVIEW_DEFAULT )
     ),
     entry(
      KEY_UI_FONT_PREVIEW_SIZE,
      asDoubleProperty( FONT_SIZE_PREVIEW_DEFAULT )
     ),
     entry(
      KEY_UI_FONT_PREVIEW_MONO_NAME,
      asStringProperty( FONT_NAME_PREVIEW_MONO_NAME_DEFAULT )
     ),
     entry(
      KEY_UI_FONT_PREVIEW_MONO_SIZE,
      asDoubleProperty( FONT_SIZE_PREVIEW_MONO_SIZE_DEFAULT )
     ),
     entry(
       KEY_UI_FONT_MATH_SIZE,
       asDoubleProperty( FONT_SIZE_MATH_DEFAULT )
     ),
     entry( KEY_UI_WINDOW_X, asDoubleProperty( WINDOW_X_DEFAULT ) ),
     entry( KEY_UI_WINDOW_Y, asDoubleProperty( WINDOW_Y_DEFAULT ) ),
     entry( KEY_UI_WINDOW_W, asDoubleProperty( WINDOW_W_DEFAULT ) ),
     entry( KEY_UI_WINDOW_H, asDoubleProperty( WINDOW_H_DEFAULT ) ),
     entry( KEY_UI_WINDOW_MAX, asBooleanProperty() ),
     entry( KEY_UI_WINDOW_FULL, asBooleanProperty() ),
     entry( KEY_UI_SKIN_SELECTION, asSkinProperty( SKIN_DEFAULT ) ),
     entry( KEY_UI_SKIN_CUSTOM, asFileProperty( SKIN_CUSTOM_DEFAULT ) ),
     entry(
       KEY_UI_PREVIEW_STYLESHEET, asFileProperty( PREVIEW_CUSTOM_DEFAULT )
     ),
     entry( KEY_LANGUAGE_LOCALE, asLocaleProperty( LOCALE_DEFAULT ) ),
     entry( KEY_TYPESET_CONTEXT_CLEAN, asBooleanProperty( true ) ),
     entry( KEY_TYPESET_CONTEXT_FONTS_DIR, asFileProperty( getFontDirectory() ) ),
     entry( KEY_TYPESET_CONTEXT_THEMES_PATH, asFileProperty( USER_DIRECTORY ) ),
     entry( KEY_TYPESET_CONTEXT_THEME_SELECTION, asStringProperty( "boschet" ) ),
     entry( KEY_TYPESET_CONTEXT_CHAPTERS, asStringProperty( "" ) ),
     entry( KEY_TYPESET_TYPOGRAPHY_QUOTES, asBooleanProperty( true ) )
     //@formatter:on
   );
   /**
    * Sets of configuration values, all the same type (e.g., file names),
    * where the key name doesn't change per set.
    */
   private final Map<Key, SetProperty<?>> mSets = Map.ofEntries(
     entry(
       KEY_UI_RECENT_OPEN_PATH,
       createSetProperty( new HashSet<String>() )
+    )
   );
   /**
    * Lists of configuration values, such as key-value pairs where both the
    * key name and the value must be preserved per list.
    */
   private final Map<Key, ListProperty<?>> mLists = Map.ofEntries(
     entry(
       KEY_DOC_META,
       createListProperty( new LinkedList<Entry<String, String>>() )
+    )
   );
   /**
    * Helps instantiate {@link Property} instances for XML configuration items.
    */
   private static final Map<Class<?>, Function<String, Object>> UNMARSHALL =
     Map.of(
       LocaleProperty.class, LocaleProperty::parseLocale,
       SimpleBooleanProperty.class, Boolean::parseBoolean,
       SimpleIntegerProperty.class, Integer::parseInt,
       SimpleDoubleProperty.class, Double::parseDouble,
       SimpleFloatProperty.class, Float::parseFloat,
       SimpleStringProperty.class, String::new,
       SimpleObjectProperty.class, String::new,
       SkinProperty.class, String::new,
       FileProperty.class, File::new
     );
   /**
    * The asymmetry with respect to {@link #UNMARSHALL} is because most objects
    * can simply call {@link Object#toString()} to convert the value to a string.
    */
   private static final Map<Class<?>, Function<String, Object>> MARSHALL =
     Map.of(
       LocaleProperty.class, LocaleProperty::toLanguageTag
     );
   /**
    * Converts the given {@link Property} value to a string.
+   *
    * @param property The {@link Property} to convert.
    * @return A string representation of the given property, or the empty
    * string if no conversion was possible.
    */
   private static String marshall( final Property<?> property ) {
     final var v = property.getValue();
     return v == null
       ? ""
       : MARSHALL
       .getOrDefault( property.getClass(), __ -> property.getValue() )
       .apply( v.toString() )
       .toString();
+  }
   private static Object unmarshall(
     final Property<?> property, final Object configValue ) {
     final var v = configValue.toString();
     return UNMARSHALL
       .getOrDefault( property.getClass(), value -> property.getValue() )
       .apply( v );
+  }
   /**
    * Creates an instance of {@link ObservableList} that is based on a
    * modifiable observable array list for the given items.
+   *
    * @param items The items to wrap in an observable list.
    * @param <E>   The type of items to add to the list.
    * @return An observable property that can have its contents modified.
    */
   public static <E> ObservableList<E> listProperty( final Set<E> items ) {
     return new SimpleListProperty<>( observableArrayList( items ) );
+  }
   private static <E> SetProperty<E> createSetProperty( final Set<E> set ) {
     return new SimpleSetProperty<>( observableSet( set ) );
+  }
   private static <E> ListProperty<E> createListProperty( final List<E> list ) {
     return new SimpleListProperty<>( observableArrayList( list ) );
+  }
   private static StringProperty asStringProperty( final String value ) {
     return new SimpleStringProperty( value );
+  }
   private static BooleanProperty asBooleanProperty() {
     return new SimpleBooleanProperty();
+  }
   /**
    * @param value Default value.
    */
   @SuppressWarnings( "SameParameterValue" )
   private static BooleanProperty asBooleanProperty( final boolean value ) {
     return new SimpleBooleanProperty( value );
+  }
   /**
    * @param value Default value.
    */
   @SuppressWarnings( "SameParameterValue" )
   private static IntegerProperty asIntegerProperty( final int value ) {
     return new SimpleIntegerProperty( value );
+  }
   /**
    * @param value Default value.
    */
   private static DoubleProperty asDoubleProperty( final double value ) {
     return new SimpleDoubleProperty( value );
+  }
   /**
    * @param value Default value.
    */
   private static FileProperty asFileProperty( final File value ) {
     return new FileProperty( value );
+  }
   /**
    * @param value Default value.
    */
   @SuppressWarnings( "SameParameterValue" )
   private static LocaleProperty asLocaleProperty( final Locale value ) {
     return new LocaleProperty( value );
+  }
   /**
    * @param value Default value.
    */
   @SuppressWarnings( "SameParameterValue" )
   private static SkinProperty asSkinProperty( final String value ) {
     return new SkinProperty( value );
+  }
   /**
    * Creates a new {@link Workspace} that will attempt to load the users'
    * preferences. If the configuration file cannot be loaded, the workspace
    * settings returns default values.
    */
   public Workspace() {
     load();
+  }
   /**
    * Attempts to load the app's configuration file.
    */
   private void load() {
     final var store = createXmlStore();
     store.load( FILE_PREFERENCES );
     mValues.keySet().forEach( key -> {
       try {
         final var storeValue = store.getValue( key );
         final var property = valuesProperty( key );
         final var unmarshalled = unmarshall( property, storeValue );
         property.setValue( unmarshalled );
       } catch( final NoSuchElementException ignored ) {
         // When no configuration (item), use the default value.
+      }
     } );
     mSets.keySet().forEach( key -> {
       final var set = store.getSet( key );
       final SetProperty<String> property = setsProperty( key );
       property.setValue( observableSet( set ) );
     } );
     mLists.keySet().forEach( key -> {
       final var map = store.getMap( key );
       final ListProperty<Entry<String, String>> property = listsProperty( key );
       final var list = map
         .entrySet()
         .stream()
         .toList();
       property.setValue( observableArrayList( list ) );
     } );
     WorkspaceLoadedEvent.fire( this );
+  }
   /**
    * Saves the current workspace.
    */
   public void save() {
     final var store = createXmlStore();
     try {
       // Update the string values to include the application version.
       valuesProperty( KEY_META_VERSION ).setValue( getVersion() );
       mValues.forEach( ( k, v ) -> store.setValue( k, marshall( v ) ) );
       mSets.forEach( store::setSet );
       mLists.forEach( store::setMap );
       store.save( FILE_PREFERENCES );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   /**
    * Returns a value that represents a setting in the application that the user
    * may configure, either directly or indirectly.
+   *
    * @param key The reference to the users' preference stored in deference
    *            of app reëntrance.
    * @return An observable property to be persisted.
    */
   @SuppressWarnings( "unchecked" )
   public <T, U extends Property<T>> U valuesProperty( final Key key ) {
     assert key != null;
     return (U) mValues.get( key );
+  }
   /**
    * Returns a set of values that represent a setting in the application that
    * the user may configure, either directly or indirectly. The property
    * returned is backed by a {@link Set}.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return An observable property to be persisted.
    */
   @SuppressWarnings( "unchecked" )
   public <T> SetProperty<T> setsProperty( final Key key ) {
     assert key != null;
     return (SetProperty<T>) mSets.get( key );
+  }
   /**
    * Returns a list of values that represent a setting in the application that
    * the user may configure, either directly or indirectly. The property
    * returned is backed by a mutable {@link List}.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return An observable property to be persisted.
    */
   @SuppressWarnings( "unchecked" )
   public <K, V> ListProperty<Entry<K, V>> listsProperty( final Key key ) {
     assert key != null;
     return (ListProperty<Entry<K, V>>) mLists.get( key );
+  }
   /**
    * Returns the {@link String} {@link Property} associated with the given
    * {@link Key} from the internal list of preference values. The caller
    * must be sure that the given {@link Key} is associated with a {@link File}
    * {@link Property}.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public StringProperty stringProperty( final Key key ) {
     assert key != null;
     return valuesProperty( key );
+  }
   /**
    * Returns the {@link Boolean} {@link Property} associated with the given
    * {@link Key} from the internal list of preference values. The caller
    * must be sure that the given {@link Key} is associated with a {@link File}
    * {@link Property}.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public BooleanProperty booleanProperty( final Key key ) {
     assert key != null;
     return valuesProperty( key );
+  }
   /**
    * Returns the {@link Integer} {@link Property} associated with the given
    * {@link Key} from the internal list of preference values. The caller
    * must be sure that the given {@link Key} is associated with a {@link File}
    * {@link Property}.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public IntegerProperty integerProperty( final Key key ) {
     assert key != null;
     return valuesProperty( key );
+  }
   /**
    * Returns the {@link Double} {@link Property} associated with the given
    * {@link Key} from the internal list of preference values. The caller
    * must be sure that the given {@link Key} is associated with a {@link File}
    * {@link Property}.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public DoubleProperty doubleProperty( final Key key ) {
     assert key != null;
     return valuesProperty( key );
+  }
   /**
    * Returns the {@link File} {@link Property} associated with the given
    * {@link Key} from the internal list of preference values. The caller
    * must be sure that the given {@link Key} is associated with a {@link File}
    * {@link Property}.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public ObjectProperty<File> fileProperty( final Key key ) {
     assert key != null;
     return valuesProperty( key );
+  }
   /**
    * Returns the {@link Locale} {@link Property} associated with the given
    * {@link Key} from the internal list of preference values. The caller
    * must be sure that the given {@link Key} is associated with a {@link File}
    * {@link Property}.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public LocaleProperty localeProperty( final Key key ) {
     assert key != null;
     return valuesProperty( key );
+  }
   public ObjectProperty<String> skinProperty( final Key key ) {
     assert key != null;
     return valuesProperty( key );
+  }
   public String getString( final Key key ) {
     assert key != null;
     return stringProperty( key ).get();
+  }
   /**
    * Returns the {@link Boolean} preference value associated with the given
    * {@link Key}. The caller must be sure that the given {@link Key} is
    * associated with a value that matches the return type.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public boolean getBoolean( final Key key ) {
     assert key != null;
     return booleanProperty( key ).get();
+  }
   /**
    * Returns the {@link Integer} preference value associated with the given
    * {@link Key}. The caller must be sure that the given {@link Key} is
    * associated with a value that matches the return type.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public int getInteger( final Key key ) {
     assert key != null;
     return integerProperty( key ).get();
+  }
   /**
    * Returns the {@link Double} preference value associated with the given
    * {@link Key}. The caller must be sure that the given {@link Key} is
    * associated with a value that matches the return type.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public double getDouble( final Key key ) {
     assert key != null;
     return doubleProperty( key ).get();
+  }
   /**
    * Returns the {@link File} preference value associated with the given
    * {@link Key}. The caller must be sure that the given {@link Key} is
    * associated with a value that matches the return type.
+   *
    * @param key The {@link Key} associated with a preference value.
    * @return The value associated with the given {@link Key}.
    */
   public File getFile( final Key key ) {
     assert key != null;
     return fileProperty( key ).get();
+  }
   /**
    * Returns the language locale setting for the
    * {@link AppKeys#KEY_LANGUAGE_LOCALE} key.
+   *
    * @return The user's current locale setting.
    */
   public Locale getLocale() {
     return localeProperty( KEY_LANGUAGE_LOCALE ).toLocale();
+  }
   @SuppressWarnings( "unchecked" )
   public <K, V> Map<K, V> getMetadata() {
     final var metadata = listsProperty( KEY_DOC_META );
     final var map = new HashMap<K, V>( metadata.size() );
     metadata.forEach(
       entry -> map.put( (K) entry.getKey(), (V) entry.getValue() )
     );
     return map;
+  }
   public Path getThemesPath() {
     final var dir = getFile( KEY_TYPESET_CONTEXT_THEMES_PATH );
     final var name = getString( KEY_TYPESET_CONTEXT_THEME_SELECTION );
     return Path.of( dir.toString(), name );
+  }
   /**
    * Delegates to {@link #listen(Key, ReadOnlyProperty, BooleanSupplier)},
    * providing a value of {@code true} for the {@link BooleanSupplier} to
    * indicate the property changes always take effect.
+   *
    * @param key      The value to bind to the internal key property.
    * @param property The external property value that sets the internal value.
    */
   public <T> void listen( final Key key, final ReadOnlyProperty<T> property ) {
     assert key != null;
     assert property != null;
     listen( key, property, () -> true );
+  }
   /**
    * Binds a read-only property to a value in the preferences. This allows
    * user interface properties to change and the preferences will be
    * synchronized automatically.
    * <p>
    * This calls {@link Platform#runLater(Runnable)} to ensure that all pending
    * application window states are finished before assessing whether property
    * changes should be applied. Without this, exiting the application while the
    * window is maximized would persist the window's maximum dimensions,
    * preventing restoration to its prior, non-maximum size.
+   *
    * @param key      The value to bind to the internal key property.
    * @param property The external property value that sets the internal value.
    * @param enabled  Indicates whether property changes should be applied.
    */
   public <T> void listen(
     final Key key,
     final ReadOnlyProperty<T> property,
     final BooleanSupplier enabled ) {
     assert key != null;
     assert property != null;
     assert enabled != null;
     property.addListener(
       ( c, o, n ) -> runLater( () -> {
         if( enabled.getAsBoolean() ) {
           valuesProperty( key ).setValue( n );
+        }
       } )
     );
+  }
   /**
    * Creates a lightweight persistence mechanism for user preferences.
+   *
    * @return The {@link XmlStore} that helps with persisting application state.
    */
   private XmlStore createXmlStore() {
     // Root-level configuration item is the application name.
     return new XmlStore( APP_TITLE_LOWERCASE );
+  }
+}

A src/main/java/com/keenwrite/preferences/XmlStore.java

 package com.keenwrite.preferences;
 import com.keenwrite.dom.DocumentParser;
 import javafx.beans.property.ListProperty;
 import javafx.beans.property.SetProperty;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import javax.xml.xpath.XPath;
 import javax.xml.xpath.XPathExpression;
 import javax.xml.xpath.XPathExpressionException;
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.util.*;
 import java.util.Map.Entry;
 import java.util.function.Consumer;
 import static javax.xml.xpath.XPathConstants.NODE;
 /**
  * Responsible for managing XML documents, which includes reading, writing,
  * retrieving, and setting elements. This is an alternative to Apache
  * Commons Configuration, JAXB, and Jackson. All of them are heavyweight and
  * the latter are difficult to use with dynamic data (because they require
  * annotations).
  * <p>
  * <strong>Note:</strong> It is preferable to use a different instance when
  * loading and saving the documents. Otherwise, old and duplicate data will
  * persist. Using a new instance ensures that elements removed from the
  * user preferences will not persist across XML configuration file versions.
  */
 public class XmlStore {
   private static final String SEPARATOR = "/";
   private final String mRoot;
   private Document mDocument = DocumentParser.newDocument();
   /**
    * Constructs a new instance with a blank {@link Document}. Call the
    * {@link #load(File)} method to populate the document from a {@link File},
    * or {@link #save(File)} to persist the current document state.
+   *
    * @param root The root-level document element.
    */
   public XmlStore( final String root ) {
     assert root != null;
     mRoot = root;
+  }
   /**
    * Loads the given configuration file into a document object model.
    * Clients of this class can set and retrieve elements via the requisite
    * access methods.
+   *
    * @param config File containing persistent user preferences.
    */
   public void load( final File config ) {
     assert config != null;
     assert config.isFile();
     try {
       mDocument = DocumentParser.parse( config );
     } catch( final Exception ignored ) {
       mDocument = DocumentParser.newDocument();
+    }
+  }
   /**
    * Returns the document value associated with the given key name.
+   *
    * @param key {@link Key} name to retrieve.
    * @return The value associated with the key.
    * @throws NoSuchElementException No value could be found for the key.
    */
   public String getValue( final Key key ) throws NoSuchElementException {
     assert key != null;
     try {
       final var node = toNode( key, mDocument );
       if( node != null ) {
         return node.getTextContent();
+      }
     } catch( final XPathExpressionException ignored ) {}
     throw new NoSuchElementException( key.toString() );
+  }
   /**
    * Returns a set of document values associated with the given key name. This
    * is suitable for basic sets, such as:
    * <pre>
    *   {@code
    *   <recent>
    *     <file>/tmp/filename.txt</file>
    *     <file>/home/username/document.md</file>
    *     <file>/usr/local/share/app/conf/help.Rmd</file>
    *   </recent>}
    * </pre>
    * <p>
    * The {@code file} element name can be ignored.
+   *
    * @param key {@link Key} name to retrieve.
    * @return The values associated with the key, or an empty set if none found.
    */
   public Set<String> getSet( final Key key ) {
     assert key != null;
     final var set = new LinkedHashSet<String>();
     visit( key, node -> set.add( node.getTextContent() ) );
     return set;
+  }
   /**
    * Returns a map of name/value pairs associated with the given key name.
    * This is suitable for mapped values, such as:
    * <pre>
    *   {@code
    *   <meta>
    *     <title>{{book.title}}</title>
    *     <author>{{book.author}}</author>
    *     <date>{{book.publish.date}}</date>
    *   </meta>}
    * </pre>
    * <p>
    * The element names under the {@code meta} node must be preserved along
    * with their values. Resolving the values based on the variable definitions
    * (in moustache syntax) is not a responsibility of this class.
+   *
    * @param key {@link Key} name to retrieve (e.g., {@code meta}).
    * @return A map of element names to element values, or an empty map if
    * none found.
    */
   public Map<String, String> getMap( final Key key ) {
     assert key != null;
     // Create a new key that will match all child nodes under the given key,
     // extracting each element as a name/value pair for the resulting map.
     final var all = Key.key( key, "*" );
     final var map = new LinkedHashMap<String, String>();
     visit( all, node -> map.put( node.getNodeName(), node.getTextContent() ) );
     return map;
+  }
   /**
    * Call to write the user preferences to a file.
+   *
    * @param config The file wherein the preferences are saved.
    * @throws IOException Could not write to the file.
    */
   public void save( final File config ) throws IOException {
     assert config != null;
     try( final var writer = new FileWriter( config ) ) {
       writer.write( DocumentParser.toString( mDocument ) );
+    }
+  }
   public void setValue( final Key key, final String value ) {
     assert key != null;
     assert value != null;
     try {
       final var node = upsert( key, mDocument );
       node.setTextContent( value );
     } catch( final XPathExpressionException ignored ) {}
+  }
   public void setSet( final Key key, final SetProperty<?> set ) {
     assert key != null;
     assert set != null;
     Node node = null;
     try {
       for( final var item : set ) {
         if( node == null ) {
           node = upsert( key, mDocument );
+        }
         else {
           final var doc = node.getOwnerDocument();
           final var sibling = doc.createElement( key.name() );
           var parent = node.getParentNode();
           if( parent == null ) {
             parent = doc.getDocumentElement();
+          }
           parent.appendChild( sibling );
           node = sibling;
+        }
         node.setTextContent( item.toString() );
+      }
     } catch( final XPathExpressionException ignored ) {}
+  }
   /**
    * @param key  The application key representing a user preference.
    * @param list List of {@link Entry} items.
    */
   public void setMap( final Key key, final ListProperty<?> list ) {
     assert key != null;
     assert list != null;
     for( final var item : list ) {
       if( item instanceof Entry<?, ?> entry ) {
         try {
           final var child = Key.key( key, entry.getKey().toString() );
           final var node = upsert( child, mDocument );
           node.setTextContent( entry.getValue().toString() );
         } catch( final XPathExpressionException ignored ) {}
+      }
+    }
+  }
   private Node toNode( final Key key, final Document doc )
     throws XPathExpressionException {
     final var xpath = toXPath( key );
     final var expr = DocumentParser.compile( xpath );
     final var element = expr.evaluate( doc, NODE );
     return element instanceof Node node ? node : null;
+  }
   /**
    * Provides the equivalent of update-or-insert behaviour provided by some
    * SQL databases. Finds the element in the document represented by the
    * given {@link Key}. If no element is found then the full path to the
    * element is created. In essence, this method converts a hierarchy of
    * {@link Key} names into a hierarchy of {@link Document} {@link Element}s
    * (i.e., {@link Node}s).
    * <p>
    * For example, given a key named {@code workspace.meta.version}, this will
    * produce a document structure that, when exported as XML, resembles:
    * <pre>{@code
    *   <root>
    *     <workspace>
    *       <meta>
    *         <version/>
    *       </meta>
    *     </workspace>
    *   </root>
    * }</pre>
    * <p>
    * The calling code is responsible for populating the {@link Node} returned
    * with its particular value. In the example above, the text content of the
    * {@link Node} would be filled with the application version number.
+   *
    * @param key The application key representing a user preference.
    * @param doc The document that may contain an xpath for the {@link Key}.
    * @return The existing or new element.
    */
   private Node upsert( final Key key, final Document doc )
     throws XPathExpressionException {
     assert key != null;
     assert doc != null;
     final var missing = new Stack<Key>();
     Key visitor = key;
     Node parent = null;
     do {
       final var node = toNode( visitor, doc );
       // If an element exists on the first iteration, return it because there
       // is no missing hierarchy to create.
       if( node != null ) {
         if( missing.isEmpty() ) {
           return node;
+        }
         parent = node;
+      }
       else {
         // Track the number of elements in the hierarchy that don't exist.
         missing.push( visitor );
         // Attempt to find the parent xpath in the document.
         visitor = visitor.parent();
+      }
+    }
     while( visitor != null && parent == null );
     // If the document is empty, update the top-level document element.
     if( parent == null ) {
       parent = doc.getDocumentElement();
       // If there is still no top-level element, then create it.
       if( parent == null ) {
         parent = doc.createElement( mRoot );
         doc.appendChild( parent );
+      }
+    }
     assert parent != null;
     // Create the hierarchy.
     while( !missing.isEmpty() ) {
       visitor = missing.pop();
       final var child = doc.createElement( visitor.name() );
       parent.appendChild( child );
       parent = child;
+    }
     return parent;
+  }
   /**
    * Abstraction for functionality that requires iterating over multiple
    * nodes under a particular xpath.
+   *
    * @param key      {@link #toXPath(Key) Compiled} into an {@link XPath}.
    * @param consumer Accepts each node that matches the {@link XPath}.
    */
   private void visit( final Key key, final Consumer<Node> consumer ) {
     assert key != null;
     assert consumer != null;
     try {
       final var xpath = toXPath( key );
       DocumentParser.visit( mDocument, xpath, consumer );
     } catch( final XPathExpressionException ignored ) {
       // Programming error. Triggered by loading a previous config version?
+    }
+  }
   /**
    * Creates an {@link XPathExpression} value based on the given {@link Key}.
+   *
    * @param key The {@link Key} to convert to an xpath string.
    * @return The given {@link Key} compiled into an {@link XPathExpression}.
    * @throws XPathExpressionException Could not compile the {@link Key}.
    */
   private StringBuilder toXPath( final Key key )
     throws XPathExpressionException {
     assert key != null;
     final var sb = new StringBuilder( 128 );
     key.walk( sb::append, SEPARATOR );
     sb.insert( 0, SEPARATOR );
     if( !mRoot.isBlank() ) {
       sb.insert( 0, SEPARATOR + mRoot );
+    }
     return sb;
+  }
   /**
    * Pretty-prints the XML document into a string. Meant to be used for
    * debugging. To save the configuration, see {@link #save(File)}.
+   *
    * @return The document in a well-formed, indented, string format.
    */
   @Override
   public String toString() {
     return DocumentParser.toString( mDocument );
+  }
+}

A src/main/java/com/keenwrite/preview/ChainedReplacedElementFactory.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import com.keenwrite.ui.adapters.ReplacedElementAdapter;
 import com.keenwrite.collections.BoundedCache;
 import org.w3c.dom.Element;
 import org.xhtmlrenderer.extend.ReplacedElement;
 import org.xhtmlrenderer.extend.ReplacedElementFactory;
 import org.xhtmlrenderer.extend.UserAgentCallback;
 import org.xhtmlrenderer.layout.LayoutContext;
 import org.xhtmlrenderer.render.BlockBox;
 import org.xhtmlrenderer.swing.ImageReplacedElement;
 import java.util.LinkedHashSet;
 import java.util.Map;
 import java.util.Set;
 import static com.keenwrite.preview.SvgReplacedElementFactory.HTML_IMAGE;
 import static com.keenwrite.preview.SvgReplacedElementFactory.HTML_IMAGE_SRC;
 import static com.keenwrite.processors.markdown.extensions.tex.TexNode.HTML_TEX;
 import static java.lang.Math.min;
 import static java.util.Arrays.asList;
 /**
  * Responsible for running one or more factories to perform post-processing on
  * the HTML document prior to displaying it.
  */
 public final class ChainedReplacedElementFactory
   extends ReplacedElementAdapter {
   /**
    * Retain insertion order so that client classes can control the order that
    * factories are used to resolve images.
    */
   private final Set<ReplacedElementFactory> mFactories = new LinkedHashSet<>();
   /**
    * A bounded cache that removes the oldest image if the maximum number of
    * cached images has been reached. This constrains the number of images
    * loaded into memory.
    */
   private final Map<String, ReplacedElement> mCache = new BoundedCache<>( 150 );
   public ChainedReplacedElementFactory(
     final ReplacedElementFactory... factories ) {
     assert factories != null;
     assert factories.length > 0;
     mFactories.addAll( asList( factories ) );
+  }
   @Override
   public ReplacedElement createReplacedElement(
     final LayoutContext c,
     final BlockBox box,
     final UserAgentCallback uac,
     final int width,
     final int height ) {
     for( final var f : mFactories ) {
       final var e = box.getElement();
       // Exit early for super-speed.
       if( e == null ) {
         break;
+      }
       // If the source image is cached, don't bother fetching. This optimization
       // avoids making multiple HTTP requests for the same URI.
       final var node = e.getNodeName();
       final var source = switch( node ) {
         case HTML_IMAGE -> e.getAttribute( HTML_IMAGE_SRC );
         case HTML_TEX -> e.getTextContent();
         default -> "";
       };
       // HTML <img> or <tex> elements without source data shall not pass.
       if( source.isBlank() ) {
         break;
+      }
       final var replaced = mCache.computeIfAbsent(
         source, k -> {
           final var r = f.createReplacedElement( c, box, uac, width, height );
           return r instanceof final ImageReplacedElement ire
             ? createImageElement( box, ire )
             : r;
+        }
       );
       if( replaced != null ) {
         return replaced;
+      }
+    }
     return null;
+  }
   @Override
   public void reset() {
     for( final var factory : mFactories ) {
       factory.reset();
+    }
+  }
   @Override
   public void remove( final Element element ) {
     for( final var factory : mFactories ) {
       factory.remove( element );
+    }
+  }
   public void addFactory( final ReplacedElementFactory factory ) {
     mFactories.add( factory );
+  }
   public void clearCache() {
     mCache.clear();
+  }
   /**
    * Creates a new image that maintains its aspect ratio while fitting into
    * the given {@link BlockBox}. If the image is too big, it is scaled down.
+   *
    * @param box The bounding region the image must fit into.
    * @param ire The image to resize.
    * @return An image that is scaled down to fit, but only if necessary.
    */
   private SmoothImageReplacedElement createImageElement(
     final BlockBox box, final ImageReplacedElement ire ) {
     return new SmoothImageReplacedElement(
       ire.getImage(), min( ire.getIntrinsicWidth(), box.getWidth() ), -1 );
+  }
+}

A src/main/java/com/keenwrite/preview/DiagramUrlGenerator.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import java.util.zip.Deflater;
 import static java.lang.String.format;
 import static java.util.Base64.getUrlEncoder;
 /**
  * Responsible for transforming text-based diagram descriptions into URLs
  * that the HTML renderer can embed as SVG images.
  */
 public class DiagramUrlGenerator {
   private DiagramUrlGenerator() {
+  }
   /**
    * Returns a URL that can be embedded as the {@code src} attribute to an HTML
    * {@code img} tag.
+   *
    * @param server  Name of server to use for diagram conversion.
    * @param diagram Diagram type (e.g., Graphviz, Block, PlantUML).
    * @param text    Diagram text that conforms to the diagram type.
    * @return A secure URL string to use as an image {@code src} attribute.
    */
   public static String toUrl(
     final String server, final String diagram, final String text ) {
     return format(
       "https://%s/%s/svg/%s", server, diagram, encode( text )
     );
+  }
   /**
    * Convert the plain-text version of the diagram into a URL-encoded value
    * suitable for passing to a web server using an HTTP GET request.
+   *
    * @param text The diagram text to encode.
    * @return The URL-encoded (and compressed) version of the text.
    */
   private static String encode( final String text ) {
     return getUrlEncoder().encodeToString( compress( text.getBytes() ) );
+  }
   /**
    * Compresses a sequence of bytes using ZLIB format.
+   *
    * @param source The data to compress.
    * @return A lossless, compressed sequence of bytes.
    */
   private static byte[] compress( byte[] source ) {
     final var deflater = new Deflater();
     deflater.setInput( source );
     deflater.finish();
     final var compressed = new byte[ Short.MAX_VALUE ];
     final var size = deflater.deflate( compressed );
     final var result = new byte[ size ];
     System.arraycopy( compressed, 0, result, 0, size );
     return result;
+  }
+}

A src/main/java/com/keenwrite/preview/FlyingSaucerPanel.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import com.keenwrite.events.FileOpenEvent;
 import com.keenwrite.events.HyperlinkOpenEvent;
 import com.keenwrite.ui.adapters.DocumentAdapter;
 import javafx.beans.property.BooleanProperty;
 import javafx.beans.property.SimpleBooleanProperty;
 import org.w3c.dom.Document;
 import org.xhtmlrenderer.layout.SharedContext;
 import org.xhtmlrenderer.render.Box;
 import org.xhtmlrenderer.simple.XHTMLPanel;
 import org.xhtmlrenderer.simple.extend.XhtmlNamespaceHandler;
 import org.xhtmlrenderer.swing.*;
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.ComponentAdapter;
 import java.awt.event.ComponentEvent;
 import java.net.URI;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.util.ProtocolScheme.getProtocol;
 import static java.lang.Boolean.FALSE;
 import static java.lang.Boolean.TRUE;
 import static java.lang.Math.max;
 import static java.lang.Thread.sleep;
 import static javax.swing.SwingUtilities.invokeLater;
 /**
  * Responsible for configuring FlyingSaucer's {@link XHTMLPanel}.
  */
 public final class FlyingSaucerPanel extends XHTMLPanel
   implements HtmlRenderer {
   /**
    * Suppresses scroll attempts until after the document has loaded.
    */
   private static final class DocumentEventHandler extends DocumentAdapter {
     private final BooleanProperty mReadyProperty = new SimpleBooleanProperty();
     @Override
     public void documentStarted() {
       mReadyProperty.setValue( FALSE );
+    }
     @Override
     public void documentLoaded() {
       mReadyProperty.setValue( TRUE );
+    }
+  }
   /**
    * Ensures that the preview panel fills its container's area completely.
    */
   private final class ComponentEventHandler extends ComponentAdapter {
     /**
      * Invoked when the component's size changes.
      */
     public void componentResized( final ComponentEvent e ) {
       setPreferredSize( e.getComponent().getPreferredSize() );
+    }
+  }
   /**
    * Responsible for opening hyperlinks. External hyperlinks are opened in
    * the system's default browser; local file system links are opened in the
    * editor.
    */
   private static final class HyperlinkListener extends LinkListener {
     @Override
     public void linkClicked( final BasicPanel panel, final String link ) {
       try {
         final var uri = new URI( link );
         switch( getProtocol( uri ) ) {
           case HTTP -> HyperlinkOpenEvent.fire( uri );
           case FILE -> FileOpenEvent.fire( uri );
+        }
       } catch( final Exception ex ) {
         clue( ex );
+      }
+    }
+  }
   private static final XhtmlNamespaceHandler XNH = new XhtmlNamespaceHandler();
   private final ChainedReplacedElementFactory mFactory;
   FlyingSaucerPanel() {
     // The order is important: SwingReplacedElementFactory replaces SVG images
     // with a blank image, which will cause the chained factory to cache the
     // image and exit. Instead, the SVG must execute first to rasterize the
     // content. Consequently, the chained factory must maintain insertion order.
     mFactory = new ChainedReplacedElementFactory(
       new SvgReplacedElementFactory(),
       new SwingReplacedElementFactory()
     );
     final var context = getSharedContext();
     final var textRenderer = context.getTextRenderer();
     context.setReplacedElementFactory( mFactory );
     textRenderer.setSmoothingThreshold( 0 );
     addDocumentListener( new DocumentEventHandler() );
     removeMouseTrackingListeners();
     addMouseTrackingListener( new HyperlinkListener() );
     addComponentListener( new ComponentEventHandler() );
+  }
   /**
    * Updates the document model displayed by the renderer. Effectively, this
    * updates the HTML document to provide new content.
+   *
    * @param doc     A complete HTML5 document, including doctype.
    * @param baseUri URI to use for finding relative files, such as images.
    */
   @Override
   public void render( final Document doc, final String baseUri ) {
     setDocument( doc, baseUri, XNH );
+  }
   @Override
   public void clearCache() {
     mFactory.clearCache();
+  }
   @Override
   public void scrollTo( final String id, final JScrollPane scrollPane ) {
     int iter = 0;
     Box box = null;
     while( iter++ < 3 && ((box = getBoxById( id )) == null) ) {
       try {
         sleep( 10 );
       } catch( final Exception ex ) {
         clue( ex );
+      }
+    }
     scrollTo( box, scrollPane );
+  }
   /**
    * Scrolls to the location specified by the {@link Box} that corresponds
    * to a point somewhere in the preview pane. If there is no caret, then
    * this will not change the scroll position. Changing the scroll position
    * to the top if the {@link Box} instance is {@code null} will result in
    * jumping around a lot and inconsistent synchronization issues.
+   *
    * @param box The rectangular region containing the caret, or {@code null}
    *            if the HTML does not have a caret.
    */
   private void scrollTo( final Box box, final JScrollPane scrollPane ) {
     if( box != null ) {
       invokeLater( () -> {
         scrollTo( createPoint( box, scrollPane ) );
         scrollPane.repaint();
       } );
+    }
+  }
   /**
    * Creates a {@link Point} to use as a reference for scrolling to the area
    * described by the given {@link Box}. The {@link Box} coordinates are used
    * to populate the {@link Point}'s location, with minor adjustments for
    * vertical centering.
+   *
    * @param box The {@link Box} that represents a scrolling anchor reference.
    * @return A coordinate suitable for scrolling to.
    */
   private Point createPoint( final Box box, final JScrollPane scrollPane ) {
     assert box != null;
     // Scroll back up by half the height of the scroll bar to keep the typing
     // area within the view port; otherwise, the view port will have jumped too
     // high up and the most recently typed letters won't be visible.
     int y = max( box.getAbsY() - scrollPane.getVerticalScrollBar()
                                            .getHeight() / 2, 0 );
     int x = box.getAbsX();
     if( !box.getStyle().isInline() ) {
       final var margin = box.getMargin( getLayoutContext() );
       y += margin.top();
       x += margin.left();
+    }
     return new Point( x, y );
+  }
   /**
    * Delegates to the {@link SharedContext}.
+   *
    * @param id The HTML element identifier to retrieve in {@link Box} form.
    * @return The {@link Box} that corresponds to the given element ID, or
    * {@code null} if none found.
    */
   Box getBoxById( final String id ) {
     return getSharedContext().getBoxById( id );
+  }
   /**
    * Suppress scrolling to the top on updates.
    */
   @Override
   public void resetScrollPosition() {
+  }
   /**
    * The default mouse click listener attempts navigation within the preview
    * panel. We want to usurp that behaviour to open the link in a
    * platform-specific browser.
    */
   private void removeMouseTrackingListeners() {
     for( final var listener : getMouseTrackingListeners() ) {
       if( !(listener instanceof HoverListener) ) {
         removeMouseTrackingListener( (FSMouseListener) listener );
+      }
+    }
+  }
+}

A src/main/java/com/keenwrite/preview/HighQualityRenderingHints.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import java.util.HashMap;
 import java.util.Map;
 import static java.awt.RenderingHints.*;
 import static java.awt.Toolkit.getDefaultToolkit;
 /**
  * Responsible for initializing settings to produce high-quality image
  * transformations.
  */
 @SuppressWarnings( "rawtypes" )
 public class HighQualityRenderingHints {
   /**
    * Default hints for high-quality rendering that may be changed by
    * the system's rendering hints.
    */
   private static final Map<Object, Object> DEFAULT_HINTS = Map.of(
     KEY_ANTIALIASING, VALUE_ANTIALIAS_ON,
     KEY_ALPHA_INTERPOLATION, VALUE_ALPHA_INTERPOLATION_QUALITY,
     KEY_COLOR_RENDERING, VALUE_COLOR_RENDER_QUALITY,
     KEY_DITHERING, VALUE_DITHER_DISABLE,
     KEY_FRACTIONALMETRICS, VALUE_FRACTIONALMETRICS_ON,
     KEY_INTERPOLATION, VALUE_INTERPOLATION_BICUBIC,
     KEY_RENDERING, VALUE_RENDER_QUALITY,
     KEY_STROKE_CONTROL, VALUE_STROKE_PURE,
     KEY_TEXT_ANTIALIASING, VALUE_TEXT_ANTIALIAS_ON
   );
   /**
    * Shared hints for high-quality rendering.
    */
   static final Map<Object, Object> RENDERING_HINTS = new HashMap<>(
     DEFAULT_HINTS
   );
   static {
     final var toolkit = getDefaultToolkit();
     final var hints = toolkit.getDesktopProperty( "awt.font.desktophints" );
     if( hints instanceof final Map map ) {
       for( final var key : map.keySet() ) {
         final var hint = map.get( key );
         RENDERING_HINTS.put( key, hint );
+      }
+    }
+  }
   /**
    * Defines a reusable constant, nothing more.
    */
   private HighQualityRenderingHints() {
+  }
+}

A src/main/java/com/keenwrite/preview/HtmlPreview.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import com.keenwrite.dom.DocumentConverter;
 import com.keenwrite.events.DocumentChangedEvent;
 import com.keenwrite.events.ScrollLockEvent;
 import com.keenwrite.preferences.LocaleProperty;
 import com.keenwrite.preferences.Workspace;
 import javafx.beans.property.DoubleProperty;
 import javafx.beans.property.StringProperty;
 import javafx.embed.swing.SwingNode;
 import org.greenrobot.eventbus.Subscribe;
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
 import java.net.URL;
 import java.nio.file.Path;
 import java.util.Locale;
 import static com.keenwrite.constants.Constants.*;
 import static com.keenwrite.events.Bus.register;
 import static com.keenwrite.events.ScrollLockEvent.fireScrollLockEvent;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preferences.AppKeys.*;
 import static com.keenwrite.ui.fonts.IconFactory.getIconFont;
 import static java.awt.BorderLayout.*;
 import static java.awt.event.KeyEvent.*;
 import static java.lang.String.format;
 import static javafx.scene.CacheHint.SPEED;
 import static javax.swing.JComponent.WHEN_IN_FOCUSED_WINDOW;
 import static javax.swing.KeyStroke.getKeyStroke;
 import static javax.swing.SwingUtilities.invokeLater;
 import static org.controlsfx.glyphfont.FontAwesome.Glyph.LOCK;
 import static org.controlsfx.glyphfont.FontAwesome.Glyph.UNLOCK_ALT;
 /**
  * Responsible for parsing an HTML document.
  */
 public final class HtmlPreview extends SwingNode implements ComponentListener {
   /**
    * Converts a text string to a structured HTML document.
    */
   private static final DocumentConverter CONVERTER = new DocumentConverter();
   /**
    * Used to populate the {@link #HTML_HEAD} with stylesheet file references.
    */
   private static final String HTML_STYLESHEET =
     "<link rel='stylesheet' href='%s'/>";
   private static final String HTML_BASE =
     "<base href='%s'/>";
   /**
    * Render CSS using points (pt) not pixels (px) to reduce the chance of
    * poor rendering. The {@link #generateHead()} method fills placeholders.
    * When the user has not set a locale, only one stylesheet is added to
    * the document. In order, the placeholders are as follows:
    * <ol>
    * <li>%s --- language</li>
    * <li>%s --- default stylesheet</li>
    * <li>%s --- language-specific stylesheet</li>
    * <li>%s --- user-customized stylesheet</li>
    * <li>%s --- font family</li>
    * <li>%d --- font size (must be pixels, not points due to bug)</li>
    * <li>%s --- base href</li>
    * </p>
    */
   private static final String HTML_HEAD = """
     <!doctype html>
     <html lang='%s'><head><title> </title><meta charset='utf-8'/>
     %s%s%s<style>body{font-family:'%s';font-size: %dpx;}</style>%s</head><body>
     """;
   private static final String HTML_TAIL = "</body></html>";
   private static final URL HTML_STYLE_PREVIEW = toUrl( STYLESHEET_PREVIEW );
   /**
    * Reusing this buffer prevents repetitious memory re-allocations.
    */
   private final StringBuilder mDocument = new StringBuilder( 65536 );
   private HtmlRenderer mPreview;
   private JScrollPane mScrollPane;
   private String mBaseUriPath = "";
   private String mHead;
   private volatile boolean mScrollLocked;
   private final JButton mScrollLockButton = new JButton();
   private final Workspace mWorkspace;
   /**
    * Creates a new preview pane that can scroll to the caret position within the
    * document.
+   *
    * @param workspace Contains locale and font size information.
    */
   public HtmlPreview( final Workspace workspace ) {
     mWorkspace = workspace;
     mHead = generateHead();
     // Attempts to prevent a flash of black un-styled content upon load.
     setStyle( "-fx-background-color: white;" );
     invokeLater( () -> {
       mPreview = new FlyingSaucerPanel();
       mScrollPane = new JScrollPane( (Component) mPreview );
       final var verticalBar = mScrollPane.getVerticalScrollBar();
       final var verticalPanel = new JPanel( new BorderLayout() );
       final var map = verticalBar.getInputMap( WHEN_IN_FOCUSED_WINDOW );
       addKeyboardEvents( map );
       mScrollLockButton.setFont( getIconFont( 14 ) );
       mScrollLockButton.setText( getLockText( mScrollLocked ) );
       mScrollLockButton.setMargin( new Insets( 1, 0, 0, 0 ) );
       mScrollLockButton.addActionListener(
         e -> fireScrollLockEvent( !mScrollLocked )
       );
       verticalPanel.add( verticalBar, CENTER );
       verticalPanel.add( mScrollLockButton, PAGE_END );
       final var wrapper = new JPanel( new BorderLayout() );
       wrapper.add( mScrollPane, CENTER );
       wrapper.add( verticalPanel, LINE_END );
       // Enabling the cache attempts to prevent black flashes when resizing.
       setCache( true );
       setCacheHint( SPEED );
       setContent( wrapper );
       wrapper.addComponentListener( this );
     } );
     localeProperty().addListener( ( c, o, n ) -> rerender() );
     fontFamilyProperty().addListener( ( c, o, n ) -> rerender() );
     fontSizeProperty().addListener( ( c, o, n ) -> rerender() );
     register( this );
+  }
   @Subscribe
   public void handle( final ScrollLockEvent event ) {
     mScrollLocked = event.isLocked();
     invokeLater(
       () -> mScrollLockButton.setText( getLockText( mScrollLocked ) )
     );
+  }
   /**
    * Updates the internal HTML source shown in the preview pane.
+   *
    * @param html The new HTML document to display.
    */
   public void render( final String html ) {
     final var jsoupDoc = DocumentConverter.parse( decorate( html ) );
     final var doc = CONVERTER.fromJsoup( jsoupDoc );
     final var uri = getBaseUri();
     doc.setDocumentURI( uri );
     invokeLater( () -> mPreview.render( doc, uri ) );
     DocumentChangedEvent.fire( html );
+  }
   /**
    * Clears the caches then re-renders the content.
    */
   public void refresh() {
     mPreview.clearCache();
     rerender();
+  }
   /**
    * Recomputes the HTML head then renders the document.
    */
   private void rerender() {
     mHead = generateHead();
     render( mDocument.toString() );
+  }
   /**
    * Attaches the HTML head prefix and HTML tail suffix to the given HTML
    * string.
+   *
    * @param html The HTML to adorn with opening and closing tags.
    * @return A complete HTML document, ready for rendering.
    */
   private String decorate( final String html ) {
     mDocument.setLength( 0 );
     mDocument.append( html );
     // Head and tail must be separate from document due to re-rendering.
     return mHead + mDocument + HTML_TAIL;
+  }
   /**
    * Called when settings are changed that affect the HTML document preamble.
    * This is a minor performance optimization to avoid generating the head
    * each time that the document itself changes.
+   *
    * @return A new doctype and HTML {@code head} element.
    */
   private String generateHead() {
     final var locale = getLocale();
     final var base = getBaseUri();
     final var custom = getCustomStylesheetUrl();
     // Point sizes are converted to pixels because of a rendering bug.
     return format(
       HTML_HEAD,
       locale.getLanguage(),
       toStylesheetString( HTML_STYLE_PREVIEW ),
       toStylesheetString( toUrl( locale ) ),
       toStylesheetString( custom ),
       getFontFamily(),
       toPixels( getFontSize() ),
       base.isBlank() ? "" : format( HTML_BASE, base )
     );
+  }
   /**
    * Clears the preview pane by rendering an empty string.
    */
   public void clear() {
     render( "" );
+  }
   /**
    * Sets the base URI to the containing directory the file being edited.
+   *
    * @param path The path to the file being edited.
    */
   public void setBaseUri( final Path path ) {
     final var parent = path.getParent();
     mBaseUriPath = parent == null ? "" : parent.toUri().toString();
+  }
   /**
    * Scrolls to the closest element matching the given identifier without
    * waiting for the document to be ready.
+   *
    * @param id Scroll the preview pane to this unique paragraph identifier.
    */
   public void scrollTo( final String id ) {
     if( !mScrollLocked ) {
       mPreview.scrollTo( id, mScrollPane );
       mScrollPane.repaint();
+    }
+  }
   private String getBaseUri() {
     return mBaseUriPath;
+  }
   private JScrollPane getScrollPane() {
     return mScrollPane;
+  }
   public JScrollBar getVerticalScrollBar() {
     return getScrollPane().getVerticalScrollBar();
+  }
   /**
    * Returns the ISO 639 alpha-2 or alpha-3 language code followed by a hyphen
    * followed by the ISO 15924 alpha-4 script code, followed by an ISO 3166
    * alpha-2 country code or UN M.49 numeric-3 area code. For example, this
    * could return {@code en-Latn-CA} for Canadian English written in the Latin
    * character set.
+   *
    * @return Unique identifier for language and country.
    */
   private static URL toUrl( final Locale locale ) {
     return toUrl(
       String.format(
         sSettings.getSetting( STYLESHEET_PREVIEW_LOCALE, "" ),
         locale.getLanguage(),
         locale.getScript(),
         locale.getCountry()
+      )
     );
+  }
   private static URL toUrl( final String path ) {
     return HtmlPreview.class.getResource( path );
+  }
   private Locale getLocale() {
     return localeProperty().toLocale();
+  }
   private LocaleProperty localeProperty() {
     return mWorkspace.localeProperty( KEY_LANGUAGE_LOCALE );
+  }
   private String getFontFamily() {
     return fontFamilyProperty().get();
+  }
   private StringProperty fontFamilyProperty() {
     return mWorkspace.stringProperty( KEY_UI_FONT_PREVIEW_NAME );
+  }
   private double getFontSize() {
     return fontSizeProperty().get();
+  }
   /**
    * Returns the font size in points.
+   *
    * @return The user-defined font size (in pt).
    */
   private DoubleProperty fontSizeProperty() {
     return mWorkspace.doubleProperty( KEY_UI_FONT_PREVIEW_SIZE );
+  }
   private String getLockText( final boolean locked ) {
     return Character.toString( (locked ? LOCK : UNLOCK_ALT).getChar() );
+  }
   private URL getCustomStylesheetUrl() {
     try {
       return mWorkspace.getFile( KEY_UI_PREVIEW_STYLESHEET ).toURI().toURL();
     } catch( final Exception ex ) {
       clue( ex );
       return null;
+    }
+  }
   /**
    * Maps keyboard events to scrollbar commands so that users may control
    * the {@link HtmlPreview} panel using the keyboard.
+   *
    * @param map The map to update with keyboard events.
    */
   private void addKeyboardEvents( final InputMap map ) {
     map.put( getKeyStroke( VK_DOWN, 0 ), "positiveUnitIncrement" );
     map.put( getKeyStroke( VK_UP, 0 ), "negativeUnitIncrement" );
     map.put( getKeyStroke( VK_PAGE_DOWN, 0 ), "positiveBlockIncrement" );
     map.put( getKeyStroke( VK_PAGE_UP, 0 ), "negativeBlockIncrement" );
     map.put( getKeyStroke( VK_HOME, 0 ), "minScroll" );
     map.put( getKeyStroke( VK_END, 0 ), "maxScroll" );
+  }
   @Override
   public void componentResized( final ComponentEvent e ) {
     if( mWorkspace.getBoolean( KEY_IMAGES_RESIZE ) ) {
       mPreview.clearCache();
+    }
     // Force update on the Swing EDT, otherwise the scrollbar and content
     // will not be updated correctly on some platforms.
     invokeLater( () -> getContent().repaint() );
+  }
   @Override
   public void componentMoved( final ComponentEvent e ) { }
   @Override
   public void componentShown( final ComponentEvent e ) { }
   @Override
   public void componentHidden( final ComponentEvent e ) { }
   private static String toStylesheetString( final URL url ) {
     return url == null ? "" : format( HTML_STYLESHEET, url );
+  }
+}

A src/main/java/com/keenwrite/preview/HtmlRenderer.java

 package com.keenwrite.preview;
 import org.w3c.dom.Document;
 import javax.swing.*;
 /**
  * Denotes the ability to render an HTML document onto a Swing component.
  */
 public interface HtmlRenderer {
   /**
    * Renders an HTML document with respect to a base location.
+   *
    * @param doc     The document to render.
    * @param baseUri The document's relative URI.
    */
   void render( final Document doc, final String baseUri );
   /**
    * Scrolls the given {@link JScrollPane} to the first HTML element that
    * has an {@code id} attribute that matches the given identifier.
+   *
    * @param id         The HTML element identifier.
    * @param scrollPane The GUI widget that controls scrolling.
    */
   void scrollTo( final String id, final JScrollPane scrollPane );
   /**
    * Clears the cache (e.g., so that images are re-rendered using updated
    * dimensions).
    */
   void clearCache();
+}

A src/main/java/com/keenwrite/preview/MathRenderer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import com.keenwrite.dom.DocumentParser;
 import com.whitemagicsoftware.keentype.lib.KeenType;
 import javafx.beans.property.DoubleProperty;
 import javafx.beans.property.SimpleDoubleProperty;
 import org.w3c.dom.Document;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Responsible for rendering formulas as scalable vector graphics (SVG).
  */
 public final class MathRenderer {
   private static KeenType sTypesetter;
   static {
     try {
       sTypesetter = new KeenType( false );
     } catch( final Exception e ) {
       clue( e );
+    }
+  }
   private static final DoubleProperty sSize = new SimpleDoubleProperty( 2 );
   private MathRenderer() { }
   public static void bindSize( final DoubleProperty size ) {
     sSize.bind( size );
+  }
   /**
    * Converts a TeX-based equation into an SVG document.
+   *
    * @param equation A mathematical expression to render, without sigils.
    * @return The given string with all formulas transformed into SVG format.
    */
   public static Document toDocument( final String equation ) {
     return DocumentParser.parse( toString( equation ) );
+  }
   /**
    * Converts a TeX-based equation into an SVG document.
+   *
    * @param equation A mathematical expression to render, without sigils.
    * @return The given string with all formulas transformed into SVG format.
    */
   public static String toString( final String equation ) {
     return sTypesetter.toSvg( "$" + equation + "$", sSize.doubleValue() );
+  }
+}

A src/main/java/com/keenwrite/preview/SmoothImageReplacedElement.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import com.keenwrite.preview.images.Lanczos3Filter;
 import com.keenwrite.preview.images.ResampleOp;
 import org.xhtmlrenderer.swing.ImageReplacedElement;
 import java.awt.*;
 import java.awt.image.BufferedImage;
 /**
  * Responsible for scaling an image using a Lanczos-3 filter, typically for
  * down-sampling.
  */
 public final class SmoothImageReplacedElement extends ImageReplacedElement {
   private static final Lanczos3Filter FILTER = new Lanczos3Filter();
   /**
    * Creates a high-quality rescaled version of the given image. The
    * aspect ratio is maintained if either width or height is less than 1.
+   *
    * @param source An instance of {@link BufferedImage} to rescale.
    * @param width  Rescale the given image to this width (px).
    * @param height Rescale the given image to this height (px).
    */
   public SmoothImageReplacedElement(
     final Image source, final int width, final int height ) {
     super._image = rescale( source, width, height );
+  }
   private BufferedImage rescale(
     final Image source, final int w, final int h ) {
     final var bi = (BufferedImage) source;
     final var dim = rescaleDimensions( bi, w, h );
     final var resampleOp = new ResampleOp( FILTER, dim.width, dim.height );
     return resampleOp.filter( bi, null );
+  }
   /**
    * Calculates scaled dimensions while maintaining the image aspect ratio.
    */
   private Dimension rescaleDimensions(
     final BufferedImage bi, final int width, final int height ) {
     final var oldW = bi.getWidth();
     final var oldH = bi.getHeight();
     int newW = width;
     int newH = height;
     if( newW <= 0 ) {
       newW = (int) (oldW * ((double) newH / oldH));
+    }
     if( newH <= 0 ) {
       newH = (int) (oldH * ((double) newW / oldW));
+    }
     return new Dimension( newW, newH );
+  }
+}

A src/main/java/com/keenwrite/preview/SvgRasterizer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import io.sf.carte.echosvg.anim.dom.SAXSVGDocumentFactory;
 import io.sf.carte.echosvg.bridge.BridgeContext;
 import io.sf.carte.echosvg.bridge.DocumentLoader;
 import io.sf.carte.echosvg.bridge.UserAgent;
 import io.sf.carte.echosvg.bridge.UserAgentAdapter;
 import io.sf.carte.echosvg.gvt.renderer.ImageRenderer;
 import io.sf.carte.echosvg.transcoder.*;
 import io.sf.carte.echosvg.transcoder.image.ImageTranscoder;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.InputStream;
 import java.io.StringReader;
 import java.net.URI;
 import java.nio.file.Path;
 import java.text.NumberFormat;
 import java.text.ParseException;
 import java.util.HashMap;
 import java.util.Map;
 import static com.keenwrite.dom.DocumentParser.transform;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preview.HighQualityRenderingHints.RENDERING_HINTS;
 import static io.sf.carte.echosvg.bridge.UnitProcessor.createContext;
 import static io.sf.carte.echosvg.bridge.UnitProcessor.svgHorizontalLengthToUserSpace;
 import static io.sf.carte.echosvg.transcoder.SVGAbstractTranscoder.KEY_HEIGHT;
 import static io.sf.carte.echosvg.transcoder.SVGAbstractTranscoder.KEY_WIDTH;
 import static io.sf.carte.echosvg.transcoder.TranscodingHints.Key;
 import static io.sf.carte.echosvg.transcoder.image.ImageTranscoder.KEY_PIXEL_UNIT_TO_MILLIMETER;
 import static io.sf.carte.echosvg.util.SVGConstants.SVG_HEIGHT_ATTRIBUTE;
 import static io.sf.carte.echosvg.util.SVGConstants.SVG_WIDTH_ATTRIBUTE;
 import static java.awt.image.BufferedImage.TYPE_INT_RGB;
 import static java.text.NumberFormat.getIntegerInstance;
 /**
  * Responsible for converting SVG images into rasterized PNG images.
  */
 public final class SvgRasterizer {
   /**
    * Prevent rudely barfing stack traces to the console.
    */
   private static final class SvgErrorHandler implements ErrorHandler {
     @Override
     public void error( final TranscoderException ex ) {
       clue( ex );
+    }
     @Override
     public void fatalError( final TranscoderException ex ) {
       clue( ex );
+    }
     @Override
     public void warning( final TranscoderException ex ) {
       clue( ex );
+    }
+  }
   private static final UserAgent USER_AGENT = new UserAgentAdapter();
   private static final BridgeContext BRIDGE_CONTEXT = new BridgeContext(
     USER_AGENT, new DocumentLoader( USER_AGENT )
   );
   private static final ErrorHandler sErrorHandler = new SvgErrorHandler();
   private static final SAXSVGDocumentFactory FACTORY_DOM =
     new SAXSVGDocumentFactory();
   private static final NumberFormat INT_FORMAT = getIntegerInstance();
   public static final BufferedImage BROKEN_IMAGE_PLACEHOLDER;
   /**
    * A FontAwesome camera icon, cleft asunder.
    */
   public static final String BROKEN_IMAGE_SVG =
     "<svg height='19pt' viewBox='0 0 25 19' width='25pt' xmlns='http://www" +
       ".w3.org/2000/svg'><g fill='#454545'><path d='m8.042969 11.085938c" +
       ".332031 1.445312 1.660156 2.503906 3.214843 2.558593zm0 0'/><path " +
       "d='m6.792969 9.621094-.300781.226562.242187.195313c.015625-.144531" +
       ".03125-.28125.058594-.421875zm0 0'/><path d='m10.597656.949219-2" +
       ".511718.207031c-.777344.066406-1.429688.582031-1.636719 1.292969l-" +
       ".367188 1.253906-3.414062.28125c-1.027344.085937-1.792969.949219-1" +
       ".699219 1.925781l.976562 10.621094c.089844.976562.996094 1.699219 " +
       "2.023438 1.613281l11.710938-.972656-3.117188-2.484375c-.246094" +
       ".0625-.5.109375-.765625.132812-2.566406.210938-4.835937-1.597656-5" +
       ".0625-4.039062-.023437-.25-.019531-.496094 0-.738281l-.242187-" +
       ".195313.300781-.226562c.359375-1.929688 2.039062-3.472656 4" +
       ".191406-3.652344.207031-.015625.414063-.015625.617187-.007812l" +
       ".933594-.707032zm0 0'/><path d='m10.234375 11.070312 2.964844 2" +
       ".820313c.144531.015625.285156.027344.433593.027344 1.890626 0 3" +
       ".429688-1.460938 3.429688-3.257813 0-1.792968-1.539062-3.257812-3" +
       ".429688-3.257812-1.890624 0-3.429687 1.464844-3.429687 3.257812 0 " +
       ".140625.011719.277344.03125.410156zm0 0'/><path d='m14.488281" +
       ".808594 1.117188 4.554687-1.042969.546875c2.25.476563 3.84375 2" +
       ".472656 3.636719 4.714844-.199219 2.191406-2.050781 3.871094-4" +
       ".285157 4.039062l2.609376 2.957032 4.4375.371094c1.03125.085937 1" +
       ".9375-.640626 2.027343-1.617188l.976563-10.617188c.089844-.980468-" +
       ".667969-1.839843-1.699219-1.925781l-3.414063-.285156-.371093-1" +
       ".253906c-.207031-.710938-.859375-1.226563-1.636719-1.289063zm0 " +
       "0'/></g></svg>";
   static {
     // The width and height cannot be embedded in the SVG above because the
     // path element values are relative to the viewBox dimensions.
     final int w = 75;
     final int h = 75;
     BufferedImage image;
     try {
       image = rasterizeImage( BROKEN_IMAGE_SVG, w );
     } catch( final Exception ex ) {
       image = new BufferedImage( w, h, TYPE_INT_RGB );
       final var graphics = (Graphics2D) image.getGraphics();
       graphics.setRenderingHints( RENDERING_HINTS );
       // Fall back to a (\) symbol.
       graphics.setColor( new Color( 204, 204, 204 ) );
       graphics.fillRect( 0, 0, w, h );
       graphics.setColor( new Color( 255, 204, 204 ) );
       graphics.setStroke( new BasicStroke( 4 ) );
       graphics.drawOval( w / 4, h / 4, w / 2, h / 2 );
       graphics.drawLine( w / 4 + (int) (w / 4 / Math.PI),
                          h / 4 + (int) (w / 4 / Math.PI),
                          w / 2 + w / 4 - (int) (w / 4 / Math.PI),
                          h / 2 + h / 4 - (int) (w / 4 / Math.PI) );
+    }
     BROKEN_IMAGE_PLACEHOLDER = image;
+  }
   /**
    * Responsible for creating a new {@link ImageRenderer} implementation that
    * can render a DOM as an SVG image.
    */
   private static class BufferedImageTranscoder extends ImageTranscoder {
     private BufferedImage mImage;
     /**
      * Prevent barfing a stack trace when the transcoder encounters problems
      * parsing SVG contents.
      */
     @Override
     protected UserAgent createUserAgent() {
       return new SVGAbstractTranscoderUserAgent() {
         @Override
         public void displayError( final Exception ex ) {
           clue( ex );
+        }
       };
+    }
     @Override
     public BufferedImage createImage( final int w, final int h ) {
       return new BufferedImage( w, h, BufferedImage.TYPE_INT_ARGB );
+    }
     @Override
     public void writeImage(
       final BufferedImage image, final TranscoderOutput output ) {
       mImage = image;
+    }
     public BufferedImage getImage() {
       return mImage;
+    }
     @Override
     protected ImageRenderer createRenderer() {
       final ImageRenderer renderer = super.createRenderer();
       final RenderingHints hints = renderer.getRenderingHints();
       hints.putAll( RENDERING_HINTS );
       renderer.setRenderingHints( hints );
       return renderer;
+    }
+  }
   /**
    * Rasterizes the given SVG input stream into an image.
+   *
    * @param svg The SVG data to rasterize, must be closed by caller.
    * @return The given input stream converted to a rasterized image.
    */
   public static BufferedImage rasterize( final String svg )
     throws TranscoderException, ParseException {
     return rasterize( toDocument( svg ) );
+  }
   /**
    * Rasterizes the given SVG input stream into an image at 96 DPI.
+   *
    * @param svg The SVG data to rasterize, must be closed by caller.
    * @return The given input stream converted to a rasterized image.
    */
   public static BufferedImage rasterize( final InputStream svg )
     throws TranscoderException {
     return rasterize( svg, 96 );
+  }
   /**
    * Rasterizes the given SVG input stream into an image.
+   *
    * @param svg The SVG data to rasterize, must be closed by caller.
    * @param dpi Resolution to use when rasterizing (default is 96 DPI).
    * @return The given input stream converted to a rasterized image at the
    * given resolution.
    */
   public static BufferedImage rasterize(
     final InputStream svg, final float dpi ) throws TranscoderException {
     return rasterize(
       new TranscoderInput( svg ),
       KEY_PIXEL_UNIT_TO_MILLIMETER,
 f / dpi * 25.4f
     );
+  }
   /**
    * Rasterizes the given document into an image.
+   *
    * @param svg   The SVG {@link Document} to rasterize.
    * @param width The rasterized image's width (in pixels).
    * @return The rasterized image.
    */
   public static BufferedImage rasterize(
     final Document svg, final int width ) throws TranscoderException {
     return rasterize(
       new TranscoderInput( svg ),
       KEY_WIDTH,
       fit( svg.getDocumentElement(), width )
     );
+  }
   /**
    * Rasterizes the given vector graphic file using the width dimension
    * specified by the document's width attribute.
+   *
    * @param document The {@link Document} containing a vector graphic.
    * @return A rasterized image as an instance of {@link BufferedImage}, or
    * {@link #BROKEN_IMAGE_PLACEHOLDER} if the graphic could not be rasterized.
    */
   public static BufferedImage rasterize( final Document document )
     throws ParseException, TranscoderException {
     final var root = document.getDocumentElement();
     final var width = root.getAttribute( SVG_WIDTH_ATTRIBUTE );
     return rasterize( document, INT_FORMAT.parse( width ).intValue() );
+  }
   /**
    * Rasterizes the vector graphic file at the given URI. If any exception
    * happens, a broken image icon is returned instead.
+   *
    * @param path  The {@link Path} to a vector graphic file.
    * @param width Scale the image to the given width (px); aspect ratio is
    *              maintained.
    * @return A rasterized image as an instance of {@link BufferedImage}.
    */
   public static BufferedImage rasterize( final Path path, final int width ) {
     return rasterize( path.toUri(), width );
+  }
   /**
    * Rasterizes the vector graphic file at the given URI. If any exception
    * happens, a broken image icon is returned instead.
+   *
    * @param uri   The URI to a vector graphic file, which must include the
    *              protocol scheme (such as <code>file://</code> or
    *              <code>https://</code>).
    * @param width Scale the image to the given width (px); aspect ratio is
    *              maintained.
    * @return A rasterized image as an instance of {@link BufferedImage}.
    */
   public static BufferedImage rasterize( final String uri, final int width ) {
     return rasterize( new File( uri ).toURI(), width );
+  }
   /**
    * Converts an SVG drawing into a rasterized image that can be drawn on
    * a graphics context.
+   *
    * @param uri   The path to the image (can be web address).
    * @param width Scale the image to the given width (px); aspect ratio is
    *              maintained.
    * @return The vector graphic transcoded into a raster image format.
    */
   public static BufferedImage rasterize( final URI uri, final int width ) {
     try {
       return rasterize( FACTORY_DOM.createDocument( uri.toString() ), width );
     } catch( final Exception ex ) {
       clue( ex );
+    }
     return BROKEN_IMAGE_PLACEHOLDER;
+  }
   /**
    * Converts an SVG string into a rasterized image that can be drawn on
    * a graphics context. The dimensions are determined from the document.
+   *
    * @param svg   The SVG xml document.
    * @param scale The scaling factor to apply when transcoding.
    * @return The vector graphic transcoded into a raster image format.
    */
   public static BufferedImage rasterizeImage(
     final String svg, final double scale )
     throws ParseException, TranscoderException {
     final var document = toDocument( svg );
     final var root = document.getDocumentElement();
     final var width = root.getAttribute( SVG_WIDTH_ATTRIBUTE );
     final var height = root.getAttribute( SVG_HEIGHT_ATTRIBUTE );
     final var w = INT_FORMAT.parse( width ).intValue() * scale;
     final var h = INT_FORMAT.parse( height ).intValue() * scale;
     return rasterize( svg, w, h );
+  }
   /**
    * Converts an SVG string into a rasterized image that can be drawn on
    * a graphics context.
+   *
    * @param svg The SVG xml document.
    * @param w   Scale the image width to this size (aspect ratio is
    *            maintained).
    * @return The vector graphic transcoded into a raster image format.
    */
   public static BufferedImage rasterizeImage( final String svg, final int w )
     throws TranscoderException {
     return rasterize( toDocument( svg ), w );
+  }
   /**
    * Given a document object model (DOM) {@link Element}, this will convert that
    * element to a string.
+   *
    * @param root The DOM node to convert to a string.
    * @return The DOM node as an escaped, plain text string.
    */
   public static String toSvg( final Element root ) {
     try {
       return transform( root ).replaceAll( "xmlns=\"\" ", "" );
     } catch( final Exception ex ) {
       clue( ex );
+    }
     return BROKEN_IMAGE_SVG;
+  }
   /**
    * Converts an SVG XML string into a new {@link Document} instance.
+   *
    * @param xml The XML containing SVG elements.
    * @return The SVG contents parsed into a {@link Document} object model.
    */
   private static Document toDocument( final String xml ) {
     try( final var reader = new StringReader( xml ) ) {
       return FACTORY_DOM.createSVGDocument(
         "http://www.w3.org/2000/svg", reader );
     } catch( final Exception ex ) {
       throw new IllegalArgumentException( ex );
+    }
+  }
   /**
    * Creates a rasterized image of the given source document.
+   *
    * @param input     The source document to transcode.
    * @param hintKey   Transcoding hint key.
    * @param hintValue Transcoding hint value.
    * @return A new {@link BufferedImageTranscoder} instance with the given
    * transcoding hint applied.
    */
   private static BufferedImage rasterize(
     final TranscoderInput input, final Key hintKey, final float hintValue )
     throws TranscoderException {
     final var hints = new HashMap<Key, Object>();
     hints.put( hintKey, hintValue );
     return rasterize( input, hints );
+  }
   private static BufferedImage rasterize(
     final String svg, final double w, final double h )
     throws TranscoderException {
     final var hints = new HashMap<Key, Object>();
     hints.put( KEY_WIDTH, (float) w );
     hints.put( KEY_HEIGHT, (float) h );
     return rasterize( new TranscoderInput( toDocument( svg ) ), hints );
+  }
   public static BufferedImage rasterize(
     final TranscoderInput input,
     final Map<TranscodingHints.Key, Object> hints ) throws TranscoderException {
     final var transcoder = new BufferedImageTranscoder();
     for( final var hint : hints.entrySet() ) {
       transcoder.addTranscodingHint( hint.getKey(), hint.getValue() );
+    }
     transcoder.setErrorHandler( sErrorHandler );
     transcoder.transcode( input, null );
     return transcoder.getImage();
+  }
   /**
    * Returns either the given element's SVG document width, or the display
    * width, whichever is smaller.
+   *
    * @param root  The SVG document's root node.
    * @param width The display width (e.g., rendering canvas width).
    * @return The lower value of the document's width or the display width.
    */
   @SuppressWarnings( "ConstantValue" )
   private static float fit( final Element root, final int width ) {
     final var w = root.getAttribute( SVG_WIDTH_ATTRIBUTE );
     return w == null || w.isBlank()
       ? width
       : fit( root, w, width );
+  }
   /**
    * Returns the width in user space units (pixels?).
+   *
    * @param root  The element containing the width attribute.
    * @param w     The element's width attribute value.
    * @param width The rendering canvas width.
    * @return Either the rendering canvas width or SVG document width,
    * whichever is smaller.
    */
   private static float fit(
     final Element root, final String w, final int width ) {
     final var usWidth = svgHorizontalLengthToUserSpace(
       w, SVG_WIDTH_ATTRIBUTE, createContext( BRIDGE_CONTEXT, root )
     );
     // If the image is too small, scale it to 1/4 the canvas width.
     return Math.min( usWidth < 5 ? width / 4.0f : usWidth, (float) width );
+  }
+}

A src/main/java/com/keenwrite/preview/SvgReplacedElementFactory.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.preview;
 import com.keenwrite.io.MediaType;
 import com.keenwrite.ui.adapters.ReplacedElementAdapter;
 import org.xhtmlrenderer.extend.ReplacedElement;
 import org.xhtmlrenderer.extend.UserAgentCallback;
 import org.xhtmlrenderer.layout.LayoutContext;
 import org.xhtmlrenderer.render.BlockBox;
 import org.xhtmlrenderer.swing.ImageReplacedElement;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.net.URI;
 import java.nio.file.Path;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.io.downloads.DownloadManager.open;
 import static com.keenwrite.preview.SvgRasterizer.*;
 import static com.keenwrite.processors.markdown.extensions.tex.TexNode.HTML_TEX;
 import static com.keenwrite.util.ProtocolScheme.getProtocol;
 /**
  * Responsible for running {@link SvgRasterizer} on SVG images detected within
  * a document to transform them into rasterized versions.
  */
 public final class SvgReplacedElementFactory extends ReplacedElementAdapter {
   public static final String HTML_IMAGE = "img";
   public static final String HTML_IMAGE_SRC = "src";
   private static final ImageReplacedElement BROKEN_IMAGE =
     createImageReplacedElement( BROKEN_IMAGE_PLACEHOLDER );
   @Override
   public ReplacedElement createReplacedElement(
     final LayoutContext c,
     final BlockBox box,
     final UserAgentCallback uac,
     final int cssWidth,
     final int cssHeight ) {
     final var e = box.getElement();
     ImageReplacedElement image = null;
     try {
       BufferedImage raster = null;
       switch( e.getNodeName() ) {
         case HTML_IMAGE -> {
           final var source = e.getAttribute( HTML_IMAGE_SRC );
           URI uri = null;
           if( getProtocol( source ).isHttp() ) {
             try( final var response = open( source ) ) {
               if( response.isSvg() ) {
                 // Rasterize SVG from URL resource.
                 raster = rasterize(
                   response.getInputStream(),
                   box.getContentWidth()
                 );
+              }
               clue( "Main.status.image.request.fetch", source );
+            }
+          }
           else if( MediaType.fromFilename( source ).isSvg() ) {
             // Attempt to rasterize based on file name.
             final var path = new File( source ).toPath();
             if( path.isAbsolute() ) {
               uri = path.toUri();
+            }
             else {
               final var base = new URI( e.getBaseURI() ).getPath();
               uri = Path.of( base, source ).toUri();
+            }
+          }
           if( uri != null ) {
             raster = rasterize( uri, box.getContentWidth() );
+          }
+        }
         case HTML_TEX ->
           // Convert the TeX element to a raster graphic.
           raster = rasterize( MathRenderer.toString( e.getTextContent() ) );
+      }
       if( raster != null ) {
         image = createImageReplacedElement( raster );
+      }
     } catch( final Exception ex ) {
       image = BROKEN_IMAGE;
       clue( ex );
+    }
     return image == null ? BROKEN_IMAGE : image;
+  }
   private static ImageReplacedElement createImageReplacedElement(
     final BufferedImage bi ) {
     return new ImageReplacedElement( bi, bi.getWidth(), bi.getHeight() );
+  }
+}

A src/main/java/com/keenwrite/preview/images/AdvancedResizeOp.java

 /*
  * Copyright 2013, Morten Nobel-Joergensen
+ *
  * License: The BSD 3-Clause License
  * http://opensource.org/licenses/BSD-3-Clause
  */
 package com.keenwrite.preview.images;
 import java.awt.*;
 import java.awt.geom.Point2D;
 import java.awt.geom.Rectangle2D;
 import java.awt.image.BufferedImage;
 import java.awt.image.BufferedImageOp;
 import java.awt.image.ColorModel;
 /**
  * @author Morten Nobel-Joergensen
  */
 public abstract class AdvancedResizeOp implements BufferedImageOp {
   private final ConstrainedDimension dimensionConstrain;
   public AdvancedResizeOp( ConstrainedDimension dimensionConstrain ) {
     this.dimensionConstrain = dimensionConstrain;
+  }
   public final BufferedImage filter( BufferedImage src, BufferedImage dest ) {
     Dimension dstDimension = dimensionConstrain.getDimension(
       new Dimension( src.getWidth(), src.getHeight() ) );
     int dstWidth = dstDimension.width;
     int dstHeight = dstDimension.height;
     return doFilter( src, dest, dstWidth, dstHeight );
+  }
   protected abstract BufferedImage doFilter(
     BufferedImage src, BufferedImage dest, int dstWidth, int dstHeight );
   @Override
   public final Rectangle2D getBounds2D( BufferedImage src ) {
     return new Rectangle( 0, 0, src.getWidth(), src.getHeight() );
+  }
   @Override
   public final BufferedImage createCompatibleDestImage(
     BufferedImage src, ColorModel destCM ) {
     if( destCM == null ) {
       destCM = src.getColorModel();
+    }
     return new BufferedImage(
       destCM,
       destCM.createCompatibleWritableRaster( src.getWidth(), src.getHeight() ),
       destCM.isAlphaPremultiplied(),
       null );
+  }
   @Override
   public final Point2D getPoint2D( Point2D srcPt, Point2D dstPt ) {
     return (Point2D) srcPt.clone();
+  }
   @Override
   public final RenderingHints getRenderingHints() {
     return null;
+  }
+}

A src/main/java/com/keenwrite/preview/images/ConstrainedDimension.java

 /*
  * Copyright 2013, Morten Nobel-Joergensen
+ *
  * License: The BSD 3-Clause License
  * http://opensource.org/licenses/BSD-3-Clause
  */
 package com.keenwrite.preview.images;
 import java.awt.*;
 /**
  * This class let you create dimension constrains based on a actual image.
  */
 public class ConstrainedDimension {
   private ConstrainedDimension() {
+  }
   /**
    * Will always return a dimension with positive width and height;
+   *
    * @param dimension of the unscaled image
    * @return the dimension of the scaled image
    */
   public Dimension getDimension( Dimension dimension ) {
     return dimension;
+  }
   /**
    * Used when the destination size is fixed. This may not keep the image
    * aspect radio.
+   *
    * @param width  destination dimension width
    * @param height destination dimension height
    * @return destination dimension (width x height)
    */
   public static ConstrainedDimension createAbsolutionDimension(
     final int width, final int height ) {
     assert width > 0 && height > 0 : "Dimensions must be positive integers";
     return new ConstrainedDimension() {
       public Dimension getDimension( Dimension dimension ) {
         return new Dimension( width, height );
+      }
     };
+  }
+}

A src/main/java/com/keenwrite/preview/images/ImageUtils.java

 /*
  * Copyright 2013, Morten Nobel-Joergensen
+ *
  * License: The BSD 3-Clause License
  * http://opensource.org/licenses/BSD-3-Clause
  */
 package com.keenwrite.preview.images;
 import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.awt.image.Raster;
 import java.awt.image.WritableRaster;
 import static java.awt.image.BufferedImage.*;
 /**
  * @author Heinz Doerr
  * @author Morten Nobel-Joergensen
  */
 public final class ImageUtils {
   @SuppressWarnings( "DuplicateBranchesInSwitch" )
   static int nrChannels( final BufferedImage img ) {
     return switch( img.getType() ) {
       case TYPE_3BYTE_BGR -> 3;
       case TYPE_4BYTE_ABGR -> 4;
       case TYPE_BYTE_GRAY -> 1;
       case TYPE_INT_BGR -> 3;
       case TYPE_INT_ARGB -> 4;
       case TYPE_INT_RGB -> 3;
       case TYPE_CUSTOM -> 4;
       case TYPE_4BYTE_ABGR_PRE -> 4;
       case TYPE_INT_ARGB_PRE -> 4;
       case TYPE_USHORT_555_RGB -> 3;
       case TYPE_USHORT_565_RGB -> 3;
       case TYPE_USHORT_GRAY -> 1;
       default -> 0;
     };
+  }
   /**
    * returns one row (height == 1) of byte packed image data in BGR or AGBR form
+   *
    * @param temp must be either null or an array with length of w*h
    */
   static void getPixelsBGR(
     BufferedImage img, int y, int w, byte[] array, int[] temp ) {
     final int x = 0;
     final int h = 1;
     assert array.length == temp.length * nrChannels( img );
     assert temp.length == w;
     final Raster raster;
     switch( img.getType() ) {
       case TYPE_3BYTE_BGR, TYPE_4BYTE_ABGR,
         TYPE_4BYTE_ABGR_PRE, TYPE_BYTE_GRAY -> {
         raster = img.getRaster();
         //int ttype= raster.getTransferType();
         raster.getDataElements( x, y, w, h, array );
+      }
       case TYPE_INT_BGR -> {
         raster = img.getRaster();
         raster.getDataElements( x, y, w, h, temp );
         ints2bytes( temp, array, 0, 1, 2 );  // bgr -->  bgr
+      }
       case TYPE_INT_RGB -> {
         raster = img.getRaster();
         raster.getDataElements( x, y, w, h, temp );
         ints2bytes( temp, array, 2, 1, 0 );  // rgb -->  bgr
+      }
       case TYPE_INT_ARGB, TYPE_INT_ARGB_PRE -> {
         raster = img.getRaster();
         raster.getDataElements( x, y, w, h, temp );
         ints2bytes( temp, array, 2, 1, 0, 3 );  // argb -->  abgr
+      }
       case TYPE_CUSTOM -> {
         // loader, but else ???
         img.getRGB( x, y, w, h, temp, 0, w );
         ints2bytes( temp, array, 2, 1, 0, 3 );  // argb -->  abgr
+      }
       default -> {
         img.getRGB( x, y, w, h, temp, 0, w );
         ints2bytes( temp, array, 2, 1, 0 );  // rgb -->  bgr
+      }
+    }
+  }
   /**
    * converts and copies byte packed  BGR or ABGR into the img buffer,
    * the img type may vary (e.g. RGB or BGR, int or byte packed)
    * but the number of components (w/o alpha, w alpha, gray) must match
    * <p>
    * does not unmange the image for all (A)RGN and (A)BGR and gray imaged
    */
   public static void setBGRPixels( byte[] bgrPixels, BufferedImage img, int x,
                                    int y, int w, int h ) {
     int imageType = img.getType();
     WritableRaster raster = img.getRaster();
     if( imageType == TYPE_3BYTE_BGR ||
       imageType == TYPE_4BYTE_ABGR ||
       imageType == TYPE_4BYTE_ABGR_PRE ||
       imageType == TYPE_BYTE_GRAY ) {
       raster.setDataElements( x, y, w, h, bgrPixels );
+    }
     else {
       int[] pixels;
       if( imageType == TYPE_INT_BGR ) {
         pixels = bytes2int( bgrPixels, 2, 1, 0 );  // bgr -->  bgr
+      }
       else if( imageType == TYPE_INT_ARGB ||
         imageType == TYPE_INT_ARGB_PRE ) {
         pixels = bytes2int( bgrPixels, 3, 0, 1, 2 );  // abgr -->  argb
+      }
       else {
         pixels = bytes2int( bgrPixels, 0, 1, 2 );  // bgr -->  rgb
+      }
       if( w == 0 || h == 0 ) {
         return;
+      }
       else if( pixels.length < w * h ) {
         throw new IllegalArgumentException( "pixels array must have a length" + " >= w*h" );
+      }
       if( imageType == TYPE_INT_ARGB ||
         imageType == TYPE_INT_RGB ||
         imageType == TYPE_INT_ARGB_PRE ||
         imageType == TYPE_INT_BGR ) {
         raster.setDataElements( x, y, w, h, pixels );
+      }
       else {
         // Unmanages the image
         img.setRGB( x, y, w, h, pixels, 0, w );
+      }
+    }
+  }
   public static void ints2bytes( int[] in, byte[] out, int index1, int index2,
                                  int index3 ) {
     for( int i = 0; i < in.length; i++ ) {
       int index = i * 3;
       int value = in[ i ];
       out[ index + index1 ] = (byte) value;
       value = value >> 8;
       out[ index + index2 ] = (byte) value;
       value = value >> 8;
       out[ index + index3 ] = (byte) value;
+    }
+  }
   public static void ints2bytes( int[] in, byte[] out, int index1, int index2,
                                  int index3, int index4 ) {
     for( int i = 0; i < in.length; i++ ) {
       int index = i * 4;
       int value = in[ i ];
       out[ index + index1 ] = (byte) value;
       value = value >> 8;
       out[ index + index2 ] = (byte) value;
       value = value >> 8;
       out[ index + index3 ] = (byte) value;
       value = value >> 8;
       out[ index + index4 ] = (byte) value;
+    }
+  }
   public static int[] bytes2int( byte[] in, int index1, int index2,
                                  int index3 ) {
     int[] out = new int[ in.length / 3 ];
     for( int i = 0; i < out.length; i++ ) {
       int index = i * 3;
       int b1 = (in[ index + index1 ] & 0xff) << 16;
       int b2 = (in[ index + index2 ] & 0xff) << 8;
       int b3 = in[ index + index3 ] & 0xff;
       out[ i ] = b1 | b2 | b3;
+    }
     return out;
+  }
   public static int[] bytes2int( byte[] in, int index1, int index2, int index3,
                                  int index4 ) {
     int[] out = new int[ in.length / 4 ];
     for( int i = 0; i < out.length; i++ ) {
       int index = i * 4;
       int b1 = (in[ index + index1 ] & 0xff) << 24;
       int b2 = (in[ index + index2 ] & 0xff) << 16;
       int b3 = (in[ index + index3 ] & 0xff) << 8;
       int b4 = in[ index + index4 ] & 0xff;
       out[ i ] = b1 | b2 | b3 | b4;
+    }
     return out;
+  }
   public static BufferedImage convert( BufferedImage src, int bufImgType ) {
     BufferedImage img = new BufferedImage( src.getWidth(),
                                            src.getHeight(),
                                            bufImgType );
     Graphics2D g2d = img.createGraphics();
     g2d.drawImage( src, 0, 0, null );
     g2d.dispose();
     return img;
+  }
+}

A src/main/java/com/keenwrite/preview/images/Lanczos3.java

 package com.keenwrite.preview.images;
 import java.awt.image.BufferedImage;
 /**
  * Unused. Needs to extract image data from {@link BufferedImage} and create
  * down-sampled version.
  */
 public class Lanczos3 {
   static double sinc( double x ) {
     x *= Math.PI;
     if( x < 0.01f && x > -0.01f ) {
       return 1.0f + x * x * (-1.0f / 6.0f + x * x * 1.0f / 120.0f);
+    }
     return Math.sin( x ) / x;
+  }
   static float clip( double t ) {
     final float eps = .0000125f;
     if( Math.abs( t ) < eps ) { return 0.0f; }
     return (float) t;
+  }
   static float lancos( float t ) {
     if( t < 0.0f ) { t = -t; }
     if( t < 3.0f ) { return clip( sinc( t ) * sinc( t / 3.0f ) ); }
     else { return 0.0f; }
+  }
   static float lancos3_resample_x(
     int[][] arr, int src_w, int src_h, int y, int x, float xscale ) {
     float s = 0;
     float coef_sum = 0.0f;
     float coef;
     float pix;
     int i;
     int l, r;
     float c;
     float hw;
     // For the reduction of the situation hw is equivalent to expanding the
     // number of pixels in the field, if you do not do this, the final
     // reduction of the image effect is not much different from the recent
     // field interpolation method, the effect is equivalent to the first
     // low-pass filtering, and then interpolate
     if( xscale > 1.0f ) { hw = 3.0f; }
     else { hw = 3.0f / xscale; }
     c = (float) x / xscale;
     l = (int) Math.floor( c - hw );
     r = (int) Math.ceil( c + hw );
     if( y < 0 ) { y = 0; }
     if( y >= src_h ) { y = src_h - 1; }
     if( xscale > 1.0f ) { xscale = 1.0f; }
     for( i = l; i <= r; i++ ) {
       x = Math.max( i, 0 );
       if( i >= src_w ) { x = src_w - 1; }
       pix = arr[ y ][ x ];
       coef = lancos( (c - i) * xscale );
       s += pix * coef;
       coef_sum += coef;
+    }
     s /= coef_sum;
     return s;
+  }
   static class uint8_2d {
     int[][] arr;
     int rows;
     int cols;
     public uint8_2d( final int h1, final int w1 ) {
       arr = new int[ h1 ][ w1 ];
       rows = h1;
       cols = w1;
+    }
+  }
   void img_resize_using_lancos3( uint8_2d src, uint8_2d dst ) {
     if( src == null || dst == null ) { return; }
     int src_rows, src_cols;
     int dst_rows, dst_cols;
     int i, j;
     int[][] src_arr;
     int[][] dst_arr;
     float xratio;
     float yratio;
     int val;
     int k;
     float hw;
     src_arr = src.arr;
     dst_arr = dst.arr;
     src_rows = src.rows;
     src_cols = src.cols;
     dst_rows = dst.rows;
     dst_cols = dst.cols;
     xratio = (float) dst_cols / (float) src_cols;
     yratio = (float) dst_rows / (float) src_rows;
     float scale;
     if( yratio > 1.0f ) {
       hw = 3.0f;
       scale = 1.0f;
+    }
     else {
       hw = 3.0f / yratio;
       scale = yratio;
+    }
     for( i = 0; i < dst_rows; i++ ) {
       for( j = 0; j < dst_cols; j++ ) {
         int t, b;
         float c;
         float s = 0;
         float coef_sum = 0.0f;
         float coef;
         float pix;
         c = (float) i / yratio;
         t = (int) Math.floor( c - hw );
         b = (int) Math.ceil( c + hw );
         // Interpolate in the x direction first, then interpolate in the y
         // direction.
         for( k = t; k <= b; k++ ) {
           pix = lancos3_resample_x( src_arr, src_cols, src_rows, k, j, xratio );
           coef = lancos( (c - k) * scale );
           coef_sum += coef;
           pix *= coef;
           s += pix;
+        }
         val = (int) (s / coef_sum);
         if( val < 0 ) { val = 0; }
         if( val > 255 ) { val = 255; }
         dst_arr[ i ][ j ] = val;
+      }
+    }
+  }
   BufferedImage test_lancos3_resize( BufferedImage img, float factor ) {
     assert img != null;
     uint8_2d r = null;
     uint8_2d g = null;
     uint8_2d b = null;
     BufferedImage out = null;
     // TODO: Split buffered image into RGB components.
     //split_img_data( img, r, g, b );
     int w, h;
     int w1, h1;
     w = img.getWidth();
     h = img.getHeight();
     // TODO: Maintain aspect ratio.
     w1 = (int) (factor * w);
     h1 = (int) (factor * h);
     uint8_2d r1 = new uint8_2d( h1, w1 );
     uint8_2d g1 = new uint8_2d( h1, w1 );
     uint8_2d b1 = new uint8_2d( h1, w1 );
     img_resize_using_lancos3( r, r1 );
     img_resize_using_lancos3( g, g1 );
     img_resize_using_lancos3( b, b1 );
     // TODO: Combine rescaled image into RGB components.
     //merge_img_data( r1, g1, b1, out);
     return out;
+  }
+}

A src/main/java/com/keenwrite/preview/images/Lanczos3Filter.java

 /*
  * Copyright 2013, Morten Nobel-Joergensen
+ *
  * License: The BSD 3-Clause License
  * http://opensource.org/licenses/BSD-3-Clause
  */
 package com.keenwrite.preview.images;
 public final class Lanczos3Filter implements ResampleFilter {
   private static final float PI_FLOAT = (float) Math.PI;
   private float sincModified( float value ) {
     return (float) Math.sin( value ) / value;
+  }
   public float apply( float value ) {
     if( value == 0 ) {
       return 1.0f;
+    }
     if( value < 0.0f ) {
       value = -value;
+    }
     if( value < 3.0f ) {
       value *= PI_FLOAT;
       return sincModified( value ) * sincModified( value / 3.0f );
+    }
     return 0.0f;
+  }
   public float getSamplingRadius() {
     return 3.0f;
+  }
+}

A src/main/java/com/keenwrite/preview/images/ResampleFilter.java

 /*
  * Copyright 2013, Morten Nobel-Joergensen
+ *
  * License: The BSD 3-Clause License
  * http://opensource.org/licenses/BSD-3-Clause
  */
 package com.keenwrite.preview.images;
 public interface ResampleFilter {
   float getSamplingRadius();
   float apply(float v);
+}

A src/main/java/com/keenwrite/preview/images/ResampleOp.java

 /*
  * Copyright 2013, Morten Nobel-Joergensen
+ *
  * License: The BSD 3-Clause License
  * http://opensource.org/licenses/BSD-3-Clause
  */
 package com.keenwrite.preview.images;
 import java.awt.image.BufferedImage;
 import java.util.concurrent.atomic.AtomicInteger;
 import static com.keenwrite.preview.images.ConstrainedDimension.*;
 import static java.awt.image.BufferedImage.*;
 import static java.awt.image.DataBuffer.TYPE_USHORT;
 import static java.lang.Runtime.getRuntime;
 import static java.lang.String.format;
 import static java.lang.Thread.currentThread;
 /**
  * Based on <a href="http://schmidt.devlib.org/jiu/">Java Image Util</a>.
  * <p>
  * Note that the filter method is not thread-safe.
  * </p>
+ *
  * @author Morten Nobel-Joergensen
  * @author Heinz Doerr
  */
 public class ResampleOp extends AdvancedResizeOp {
   private static final int MAX_CHANNEL_VALUE = 255;
   private int nrChannels;
   private int srcWidth;
   private int srcHeight;
   private int dstWidth;
   private int dstHeight;
   static class SubSamplingData {
     // individual - per row or per column - nr of contributions
     private final int[] arrN;
     // 2Dim: [wid or hei][contrib]
     private final int[] arrPixel;
     // 2Dim: [wid or hei][contrib]
     private final float[] arrWeight;
     // the primary index length for the 2Dim arrays : arrPixel and arrWeight
     private final int numContributors;
     private SubSamplingData( int[] arrN, int[] arrPixel, float[] arrWeight,
                              int numContributors ) {
       this.arrN = arrN;
       this.arrPixel = arrPixel;
       this.arrWeight = arrWeight;
       this.numContributors = numContributors;
+    }
     public int[] getArrN() {
       return arrN;
+    }
+  }
   private SubSamplingData horizontalSubsamplingData;
   private SubSamplingData verticalSubsamplingData;
   private final int threadCount = getRuntime().availableProcessors();
   private final AtomicInteger multipleInvocationLock = new AtomicInteger();
   private final ResampleFilter mFilter;
   public ResampleOp(
     final ResampleFilter filter, final int destWidth, final int destHeight ) {
     this( filter,
           createAbsolutionDimension( destWidth, destHeight ) );
+  }
   public ResampleOp(
     final ResampleFilter filter, ConstrainedDimension dimensionConstrain ) {
     super( dimensionConstrain );
     mFilter = filter;
+  }
   public BufferedImage doFilter(
     BufferedImage srcImg, BufferedImage dest, int dstWidth, int dstHeight ) {
     this.dstWidth = dstWidth;
     this.dstHeight = dstHeight;
     if( dstWidth < 3 || dstHeight < 3 ) {
       throw new IllegalArgumentException( "Target must be at least 3x3." );
+    }
     assert multipleInvocationLock.incrementAndGet() == 1 :
       "Multiple concurrent invocations detected";
     final var srcType = srcImg.getType();
     if( srcType == TYPE_BYTE_BINARY ||
       srcType == TYPE_BYTE_INDEXED ||
       srcType == TYPE_CUSTOM ) {
       srcImg = ImageUtils.convert(
         srcImg,
         srcImg.getColorModel().hasAlpha() ? TYPE_4BYTE_ABGR : TYPE_3BYTE_BGR );
+    }
     this.nrChannels = ImageUtils.nrChannels( srcImg );
     assert nrChannels > 0;
     this.srcWidth = srcImg.getWidth();
     this.srcHeight = srcImg.getHeight();
     byte[][] workPixels = new byte[ srcHeight ][ dstWidth * nrChannels ];
     // Pre-calculate  sub-sampling
     horizontalSubsamplingData = createSubSampling(
       mFilter, srcWidth, dstWidth );
     verticalSubsamplingData = createSubSampling(
       mFilter, srcHeight, dstHeight );
     final BufferedImage scrImgCopy = srcImg;
     final byte[][] workPixelsCopy = workPixels;
     final Thread[] threads = new Thread[ threadCount - 1 ];
     for( int i = 1; i < threadCount; i++ ) {
       final int finalI = i;
       threads[ i - 1 ] = new Thread( () -> horizontallyFromSrcToWork(
         scrImgCopy, workPixelsCopy, finalI, threadCount ) );
       threads[ i - 1 ].start();
+    }
     horizontallyFromSrcToWork( scrImgCopy, workPixelsCopy, 0, threadCount );
     waitForAllThreads( threads );
     byte[] outPixels = new byte[ dstWidth * dstHeight * nrChannels ];
     // --------------------------------------------------
     // Apply filter to sample vertically from Work to Dst
     // --------------------------------------------------
     final byte[] outPixelsCopy = outPixels;
     for( int i = 1; i < threadCount; i++ ) {
       final int finalI = i;
       threads[ i - 1 ] = new Thread( () -> verticalFromWorkToDst(
         workPixelsCopy, outPixelsCopy, finalI, threadCount ) );
       threads[ i - 1 ].start();
+    }
     verticalFromWorkToDst( workPixelsCopy, outPixelsCopy, 0, threadCount );
     waitForAllThreads( threads );
     // free memory
     // noinspection UnusedAssignment
     workPixels = null;
     final BufferedImage out;
     if( dest != null &&
       dstWidth == dest.getWidth() &&
       dstHeight == dest.getHeight() ) {
       out = dest;
       int nrDestChannels = ImageUtils.nrChannels( dest );
       if( nrDestChannels != nrChannels ) {
         final var errorMgs = format(
           "Destination image must be compatible width source image. Source " +
             "image had %d channels destination image had %d channels",
           nrChannels, nrDestChannels );
         throw new RuntimeException( errorMgs );
+      }
+    }
     else {
       out = new BufferedImage(
         dstWidth, dstHeight, getResultBufferedImageType( srcImg ) );
+    }
     ImageUtils.setBGRPixels( outPixels, out, 0, 0, dstWidth, dstHeight );
     assert multipleInvocationLock.decrementAndGet() == 0 : "Multiple " +
       "concurrent invocations detected";
     return out;
+  }
   private void waitForAllThreads( final Thread[] threads ) {
     try {
       for( final Thread thread : threads ) {
         thread.join( Long.MAX_VALUE );
+      }
     } catch( final InterruptedException e ) {
       currentThread().interrupt();
       throw new RuntimeException( e );
+    }
+  }
   static SubSamplingData createSubSampling(
     ResampleFilter filter, int srcSize, int dstSize ) {
     final float scale = (float) dstSize / (float) srcSize;
     final int[] arrN = new int[ dstSize ];
     final int numContributors;
     final float[] arrWeight;
     final int[] arrPixel;
     final float fwidth = filter.getSamplingRadius();
     float centerOffset = 0.5f / scale;
     if( scale < 1.0f ) {
       final float width = fwidth / scale;
       // Add 2 to be safe with the ceiling
       numContributors = (int) (width * 2.0f + 2);
       arrWeight = new float[ dstSize * numContributors ];
       arrPixel = new int[ dstSize * numContributors ];
       final float fNormFac = (float) (1f / (Math.ceil( width ) / fwidth));
       for( int i = 0; i < dstSize; i++ ) {
         final int subindex = i * numContributors;
         float center = i / scale + centerOffset;
         int left = (int) Math.floor( center - width );
         int right = (int) Math.ceil( center + width );
         for( int j = left; j <= right; j++ ) {
           float weight;
           weight = filter.apply( (center - j) * fNormFac );
           if( weight == 0.0f ) {
             continue;
+          }
           int n;
           if( j < 0 ) {
             n = -j;
+          }
           else if( j >= srcSize ) {
             n = srcSize - j + srcSize - 1;
+          }
           else {
             n = j;
+          }
           int k = arrN[ i ];
           //assert k == j-left:String.format("%s = %s %s", k,j,left);
           arrN[ i ]++;
           if( n < 0 || n >= srcSize ) {
             weight = 0.0f;// Flag that cell should not be used
+          }
           arrPixel[ subindex + k ] = n;
           arrWeight[ subindex + k ] = weight;
+        }
         // normalize the filter's weight's so the sum equals to 1.0, very
         // important for avoiding box type of artifacts
         final int max = arrN[ i ];
         float tot = 0;
         for( int k = 0; k < max; k++ ) { tot += arrWeight[ subindex + k ]; }
         if( tot != 0f ) { // 0 should never happen except bug in filter
           for( int k = 0; k < max; k++ ) { arrWeight[ subindex + k ] /= tot; }
+        }
+      }
+    }
     else {
       // super-sampling
       // Scales from smaller to bigger height
       numContributors = (int) (fwidth * 2.0f + 1);
       arrWeight = new float[ dstSize * numContributors ];
       arrPixel = new int[ dstSize * numContributors ];
       //
       for( int i = 0; i < dstSize; i++ ) {
         final int subindex = i * numContributors;
         float center = i / scale + centerOffset;
         int left = (int) Math.floor( center - fwidth );
         int right = (int) Math.ceil( center + fwidth );
         for( int j = left; j <= right; j++ ) {
           float weight = filter.apply( center - j );
           if( weight == 0.0f ) {
             continue;
+          }
           int n;
           if( j < 0 ) {
             n = -j;
+          }
           else if( j >= srcSize ) {
             n = srcSize - j + srcSize - 1;
+          }
           else {
             n = j;
+          }
           int k = arrN[ i ];
           arrN[ i ]++;
           if( n < 0 || n >= srcSize ) {
             weight = 0.0f;// Flag that cell should not be used
+          }
           arrPixel[ subindex + k ] = n;
           arrWeight[ subindex + k ] = weight;
+        }
         // normalize the filter's weight's so the sum equals to 1.0, very
         // important for avoiding box type of artifacts
         final int max = arrN[ i ];
         float tot = 0;
         for( int k = 0; k < max; k++ ) { tot += arrWeight[ subindex + k ]; }
         assert tot != 0 : "should never happen except bug in filter";
         if( tot != 0f ) {
           for( int k = 0; k < max; k++ ) { arrWeight[ subindex + k ] /= tot; }
+        }
+      }
+    }
     return new SubSamplingData( arrN, arrPixel, arrWeight, numContributors );
+  }
   private void verticalFromWorkToDst( byte[][] workPixels, byte[] outPixels,
                                       int start, int delta ) {
     if( nrChannels == 1 ) {
       verticalFromWorkToDstGray(
         workPixels, outPixels, start, threadCount );
       return;
+    }
     boolean useChannel3 = nrChannels > 3;
     for( int x = start; x < dstWidth; x += delta ) {
       final int xLoc = x * nrChannels;
       for( int y = dstHeight - 1; y >= 0; y-- ) {
         final int yTimesNumContributors =
           y * verticalSubsamplingData.numContributors;
         final int max = verticalSubsamplingData.arrN[ y ];
         final int sampleLocation = (y * dstWidth + x) * nrChannels;
         float sample0 = 0.0f;
         float sample1 = 0.0f;
         float sample2 = 0.0f;
         float sample3 = 0.0f;
         int index = yTimesNumContributors;
         for( int j = max - 1; j >= 0; j-- ) {
           int valueLoc = verticalSubsamplingData.arrPixel[ index ];
           float arrWeight = verticalSubsamplingData.arrWeight[ index ];
           sample0 += (workPixels[ valueLoc ][ xLoc ] & 0xff) * arrWeight;
           sample1 += (workPixels[ valueLoc ][ xLoc + 1 ] & 0xff) * arrWeight;
           sample2 += (workPixels[ valueLoc ][ xLoc + 2 ] & 0xff) * arrWeight;
           if( useChannel3 ) {
             sample3 += (workPixels[ valueLoc ][ xLoc + 3 ] & 0xff) * arrWeight;
+          }
           index++;
+        }
         outPixels[ sampleLocation ] = toByte( sample0 );
         outPixels[ sampleLocation + 1 ] = toByte( sample1 );
         outPixels[ sampleLocation + 2 ] = toByte( sample2 );
         if( useChannel3 ) {
           outPixels[ sampleLocation + 3 ] = toByte( sample3 );
+        }
+      }
+    }
+  }
   private void verticalFromWorkToDstGray(
     byte[][] workPixels, byte[] outPixels, int start, int delta ) {
     for( int x = start; x < dstWidth; x += delta ) {
       for( int y = dstHeight - 1; y >= 0; y-- ) {
         final int yTimesNumContributors =
           y * verticalSubsamplingData.numContributors;
         final int max = verticalSubsamplingData.arrN[ y ];
         final int sampleLocation = y * dstWidth + x;
         float sample0 = 0.0f;
         int index = yTimesNumContributors;
         for( int j = max - 1; j >= 0; j-- ) {
           int valueLocation = verticalSubsamplingData.arrPixel[ index ];
           float arrWeight = verticalSubsamplingData.arrWeight[ index ];
           sample0 += (workPixels[ valueLocation ][ x ] & 0xff) * arrWeight;
           index++;
+        }
         outPixels[ sampleLocation ] = toByte( sample0 );
+      }
+    }
+  }
   /**
    * Apply filter to sample horizontally from Src to Work
    */
   private void horizontallyFromSrcToWork(
     BufferedImage srcImg, byte[][] workPixels, int start, int delta ) {
     if( nrChannels == 1 ) {
       horizontallyFromSrcToWorkGray( srcImg, workPixels, start, delta );
       return;
+    }
     // Used if we work on int based bitmaps, later used to keep channel values
     final int[] tempPixels = new int[ srcWidth ];
     // create reusable row to minimize memory overhead
     final byte[] srcPixels = new byte[ srcWidth * nrChannels ];
     final boolean useChannel3 = nrChannels > 3;
     for( int k = start; k < srcHeight; k = k + delta ) {
       ImageUtils.getPixelsBGR( srcImg, k, srcWidth, srcPixels, tempPixels );
       for( int i = dstWidth - 1; i >= 0; i-- ) {
         int sampleLocation = i * nrChannels;
         final int max = horizontalSubsamplingData.arrN[ i ];
         float sample0 = 0.0f;
         float sample1 = 0.0f;
         float sample2 = 0.0f;
         float sample3 = 0.0f;
         int index = i * horizontalSubsamplingData.numContributors;
         for( int j = max - 1; j >= 0; j-- ) {
           float arrWeight = horizontalSubsamplingData.arrWeight[ index ];
           int pixelIndex =
             horizontalSubsamplingData.arrPixel[ index ] * nrChannels;
           sample0 += (srcPixels[ pixelIndex ] & 0xff) * arrWeight;
           sample1 += (srcPixels[ pixelIndex + 1 ] & 0xff) * arrWeight;
           sample2 += (srcPixels[ pixelIndex + 2 ] & 0xff) * arrWeight;
           if( useChannel3 ) {
             sample3 += (srcPixels[ pixelIndex + 3 ] & 0xff) * arrWeight;
+          }
           index++;
+        }
         workPixels[ k ][ sampleLocation ] = toByte( sample0 );
         workPixels[ k ][ sampleLocation + 1 ] = toByte( sample1 );
         workPixels[ k ][ sampleLocation + 2 ] = toByte( sample2 );
         if( useChannel3 ) {
           workPixels[ k ][ sampleLocation + 3 ] = toByte( sample3 );
+        }
+      }
+    }
+  }
   /**
    * Apply filter to sample horizontally from Src to Work
    */
   private void horizontallyFromSrcToWorkGray(
     BufferedImage srcImg, byte[][] workPixels, int start, int delta ) {
     // Used if we work on int based bitmaps, later used to keep channel values
     final int[] tempPixels = new int[ srcWidth ];
     // create reusable row to minimize memory overhead
     final byte[] srcPixels = new byte[ srcWidth ];
     for( int k = start; k < srcHeight; k = k + delta ) {
       ImageUtils.getPixelsBGR( srcImg, k, srcWidth, srcPixels, tempPixels );
       for( int i = dstWidth - 1; i >= 0; i-- ) {
         final int max = horizontalSubsamplingData.arrN[ i ];
         float sample0 = 0.0f;
         int index = i * horizontalSubsamplingData.numContributors;
         for( int j = max - 1; j >= 0; j-- ) {
           float arrWeight = horizontalSubsamplingData.arrWeight[ index ];
           int pixelIndex = horizontalSubsamplingData.arrPixel[ index ];
           sample0 += (srcPixels[ pixelIndex ] & 0xff) * arrWeight;
           index++;
+        }
         workPixels[ k ][ i ] = toByte( sample0 );
+      }
+    }
+  }
   private static byte toByte( final float f ) {
     if( f < 0 ) {
       return 0;
+    }
     return (byte) (f > MAX_CHANNEL_VALUE ? MAX_CHANNEL_VALUE : f + 0.5f);
+  }
   protected int getResultBufferedImageType( BufferedImage srcImg ) {
     return nrChannels == 3
       ? TYPE_3BYTE_BGR
       : nrChannels == 4
       ? TYPE_4BYTE_ABGR
       : srcImg.getSampleModel().getDataType() == TYPE_USHORT
       ? TYPE_USHORT_GRAY
       : TYPE_BYTE_GRAY;
+  }
+}

A src/main/java/com/keenwrite/processors/ExecutorProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicReference;
 /**
  * Responsible for transforming data through a variety of chained handlers.
+ *
  * @param <T> The data type to process.
  */
 public class ExecutorProcessor<T> implements Processor<T> {
   /**
    * The next link in the processing chain.
    */
   private final Processor<T> mNext;
   protected ExecutorProcessor() {
     this( null );
+  }
   /**
    * Constructs a new processor having a given successor.
+   *
    * @param successor The next processor in the chain.
    */
   public ExecutorProcessor( final Processor<T> successor ) {
     mNext = successor;
+  }
   /**
    * Calls every link in the chain to process the given data.
+   *
    * @param data The data to transform.
    * @return The data after processing by every link in the chain.
    */
   @Override
   public T apply( final T data ) {
     // Start processing using the first processor after the executor.
     Optional<Processor<T>> handler = next();
     final var result = new MutableReference( data );
     while( handler.isPresent() ) {
       handler = handler.flatMap( p -> {
         result.set( p.apply( result.get() ) );
         return p.next();
       } );
+    }
     return result.get();
+  }
   @Override
   public Optional<Processor<T>> next() {
     return Optional.ofNullable( mNext );
+  }
   /**
    * A minor micro-optimization, since the processors cannot be run in parallel,
    * avoid using an {@link AtomicReference} during processor execution. This
    * is about twice as fast for the first four processor links in the chain.
    */
   private final class MutableReference {
     private T mObject;
     MutableReference( final T object ) {
       set( object );
+    }
     void set( final T object ) {
       mObject = object;
+    }
     T get() {
       return mObject;
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/HtmlPreviewProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 import com.keenwrite.preview.HtmlPreview;
 /**
  * Responsible for notifying the {@link HtmlPreview} when the succession
  * chain has updated. This decouples knowledge of changes to the editor panel
  * from the HTML preview panel as well as any processing that takes place
  * before the final HTML preview is rendered. This is the last link in the
  * processor chain.
  */
 public final class HtmlPreviewProcessor extends ExecutorProcessor<String> {
   /**
    * There is only one preview panel.
    */
   private static HtmlPreview sHtmlPreview;
   /**
    * Constructs the end of a processing chain.
+   *
    * @param htmlPreview The pane to update with the post-processed document.
    */
   public HtmlPreviewProcessor( final HtmlPreview htmlPreview ) {
     sHtmlPreview = htmlPreview;
+  }
   /**
    * Update the preview panel using HTML from the succession chain.
+   *
    * @param html The document content to render in the preview pane. The HTML
    *             should not contain a doctype, head, or body tag.
    * @return The given {@code html} string.
    */
   @Override
   public String apply( final String html ) {
     assert html != null;
     sHtmlPreview.render( html );
     return html;
+  }
+}

A src/main/java/com/keenwrite/processors/IdentityProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 /**
  * Responsible for transforming a string into itself. This is used at the
  * end of a processing chain when no more processing is required.
  */
 public final class IdentityProcessor extends ExecutorProcessor<String> {
   public static final IdentityProcessor IDENTITY = new IdentityProcessor();
   /**
    * Constructs a new instance having no successor (the default successor is
    * {@code null}).
    */
   private IdentityProcessor() {
+  }
   /**
    * Returns the given string without modification.
+   *
    * @param s The string to return.
    * @return The value of s.
    */
   @Override
   public String apply( final String s ) {
     return s;
+  }
+}

A src/main/java/com/keenwrite/processors/PdfProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 import com.keenwrite.typesetting.Typesetter;
 import static com.keenwrite.Bootstrap.APP_TITLE_ABBR;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.io.MediaType.TEXT_XML;
 import static com.keenwrite.typesetting.Typesetter.Mutator;
 import static java.nio.file.Files.deleteIfExists;
 import static java.nio.file.Files.writeString;
 /**
  * Responsible for using a typesetting engine to convert an XHTML document
  * into a PDF file. This must not be run from the JavaFX thread.
  */
 public final class PdfProcessor extends ExecutorProcessor<String> {
   private final ProcessorContext mProcessorContext;
   public PdfProcessor( final ProcessorContext context ) {
     assert context != null;
     mProcessorContext = context;
+  }
   /**
    * Converts a document by calling a third-party application to typeset the
    * given XHTML document.
+   *
    * @param xhtml The document to convert to a PDF file.
    * @return {@code null} because there is no valid return value from generating
    * a PDF file.
    */
   public String apply( final String xhtml ) {
     try {
       clue( "Main.status.typeset.create" );
       final var context = mProcessorContext;
       final var parent = context.getTargetPath().getParent();
       final var document =
         TEXT_XML.createTempFile( APP_TITLE_ABBR, parent );
       final var typesetter = Typesetter
         .builder()
         .with( Mutator::setAutoRemove, context.getAutoRemove() )
         .with( Mutator::setSourcePath, writeString( document, xhtml ) )
         .with( Mutator::setTargetPath, context.getTargetPath() )
         .with( Mutator::setThemesPath, context.getThemesPath() )
         .with( Mutator::setImagesPath, context.getImagesPath() )
         .with( Mutator::setCachesPath, context.getCachesPath() )
         .with( Mutator::setFontsPath, context.getFontsPath() )
         .build();
       typesetter.typeset();
       // Smote the temporary file after typesetting the document.
       if( typesetter.autoRemove() ) {
         deleteIfExists( document );
+      }
     } catch( final Exception ex ) {
       // Typesetter runtime exceptions will pass up the call stack.
       clue( "Main.status.typeset.failed", ex );
+    }
     // Do not continue processing (the document was typeset into a binary).
     return null;
+  }
+}

A src/main/java/com/keenwrite/processors/PreformattedProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 /**
  * This is the default processor used when an unknown file name extension is
  * encountered. It processes the text by enclosing it in an HTML {@code <pre>}
  * element.
  */
 public final class PreformattedProcessor extends ExecutorProcessor<String> {
   /**
    * Passes the link to the super constructor.
+   *
    * @param successor The next processor in the chain to use for text
    *                  processing.
    */
   public PreformattedProcessor( final Processor<String> successor ) {
     super( successor );
+  }
   /**
    * Returns the given string, modified with "pre" tags.
+   *
    * @param t The string to return, enclosed in "pre" tags.
    * @return The value of t wrapped in "pre" tags.
    */
   @Override
   public String apply( final String t ) {
     return "<pre>" + t + "</pre>";
+  }
+}

A src/main/java/com/keenwrite/processors/Processor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 import java.util.Optional;
 import java.util.function.UnaryOperator;
 /**
  * Responsible for processing documents from one known format to another.
  * Processes the given content providing a transformation from one document
  * format into another. For example, this could convert Markdown to HTML.
+ *
  * @param <T> The data type to process.
  */
 public interface Processor<T> extends UnaryOperator<T> {
   /**
    * Returns the next link in the processor chain.
+   *
    * @return The processor intended to transform the data after this instance
    * has finished processing, or {@link Optional#empty} if this is the last
    * link in the chain.
    */
   default Optional<Processor<T>> next() {
     return Optional.empty();
+  }
+}

A src/main/java/com/keenwrite/processors/ProcessorContext.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 import com.keenwrite.ExportFormat;
 import com.keenwrite.collections.InterpolatingMap;
 import com.keenwrite.constants.Constants;
 import com.keenwrite.editors.common.Caret;
 import com.keenwrite.io.FileType;
 import com.keenwrite.sigils.PropertyKeyOperator;
 import com.keenwrite.sigils.SigilKeyOperator;
 import com.keenwrite.util.GenericBuilder;
 import org.renjin.repackaged.guava.base.Splitter;
 import java.io.File;
 import java.nio.file.Path;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.Callable;
 import java.util.function.Supplier;
 import static com.keenwrite.Bootstrap.USER_CACHE_DIR;
 import static com.keenwrite.Bootstrap.USER_DATA_DIR;
 import static com.keenwrite.constants.Constants.*;
 import static com.keenwrite.io.FileType.UNKNOWN;
 import static com.keenwrite.io.MediaType.TEXT_PROPERTIES;
 import static com.keenwrite.io.MediaType.valueFrom;
 import static com.keenwrite.predicates.PredicateFactory.createFileTypePredicate;
 /**
  * Provides a context for configuring a chain of {@link Processor} instances.
  */
 public final class ProcessorContext {
   private final Mutator mMutator;
   /**
    * Determines the file type from the path extension. This should only be
    * called when it is known that the file type won't be a definition file
    * (e.g., YAML or other definition source), but rather an editable file
    * (e.g., Markdown, R Markdown, etc.).
+   *
    * @param path The path with a file name extension.
    * @return The FileType for the given path.
    */
   private static FileType lookup( final Path path ) {
     assert path != null;
     final var prefix = GLOB_PREFIX_FILE;
     final var keys = sSettings.getKeys( prefix );
     var found = false;
     var fileType = UNKNOWN;
     while( keys.hasNext() && !found ) {
       final var key = keys.next();
       final var patterns = sSettings.getStringSettingList( key );
       final var predicate = createFileTypePredicate( patterns );
       if( predicate.test( path.toFile() ) ) {
         // Remove the EXTENSIONS_PREFIX to get the file name extension mapped
         // to a standard name (as defined in the settings.properties file).
         final String suffix = key.replace( prefix + '.', "" );
         fileType = FileType.from( suffix );
         found = true;
+      }
+    }
     return fileType;
+  }
   public boolean isExportFormat( final ExportFormat exportFormat ) {
     return mMutator.mExportFormat == exportFormat;
+  }
   /**
    * Responsible for populating the instance variables required by the
    * context.
    */
   public static class Mutator {
     private Path mSourcePath;
     private Path mTargetPath;
     private ExportFormat mExportFormat;
     private boolean mConcatenate;
     private Supplier<Path> mThemesPath = USER_DIRECTORY::toPath;
     private Supplier<Locale> mLocale = () -> Locale.ENGLISH;
     private Supplier<Map<String, String>> mDefinitions = HashMap::new;
     private Supplier<Map<String, String>> mMetadata = HashMap::new;
     private Supplier<Caret> mCaret = () -> Caret.builder().build();
     private Supplier<Path> mFontsPath = () -> getFontDirectory().toPath();
     private Supplier<Path> mImagesPath = USER_DIRECTORY::toPath;
     private Supplier<String> mImageServer = () -> DIAGRAM_SERVER_NAME;
     private Supplier<String> mImageOrder = () -> PERSIST_IMAGES_DEFAULT;
     private Supplier<Path> mCachesPath = USER_CACHE_DIR::toPath;
     private Supplier<String> mSigilBegan = () -> DEF_DELIM_BEGAN_DEFAULT;
     private Supplier<String> mSigilEnded = () -> DEF_DELIM_ENDED_DEFAULT;
     private Supplier<Path> mRWorkingDir = USER_DIRECTORY::toPath;
     private Supplier<String> mRScript = () -> "";
     private Supplier<Boolean> mCurlQuotes = () -> true;
     private Supplier<Boolean> mAutoRemove = () -> true;
     public void setSourcePath( final Path sourcePath ) {
       assert sourcePath != null;
       mSourcePath = sourcePath;
+    }
     public void setTargetPath( final Path outputPath ) {
       assert outputPath != null;
       mTargetPath = outputPath;
+    }
     public void setTargetPath( final File targetPath ) {
       assert targetPath != null;
       setTargetPath( targetPath.toPath() );
+    }
     public void setThemesPath( final Supplier<Path> themesPath ) {
       assert themesPath != null;
       mThemesPath = themesPath;
+    }
     public void setCachesPath( final Supplier<File> cachesDir ) {
       assert cachesDir != null;
       mCachesPath = () -> {
         final var dir = cachesDir.get();
         return (dir == null ? USER_DATA_DIR.toFile() : dir).toPath();
       };
+    }
     public void setImagesPath( final Supplier<File> imagesDir ) {
       assert imagesDir != null;
       mImagesPath = () -> {
         final var dir = imagesDir.get();
         return (dir == null ? USER_DIRECTORY : dir).toPath();
       };
+    }
     public void setImageOrder( final Supplier<String> imageOrder ) {
       assert imageOrder != null;
       mImageOrder = imageOrder;
+    }
     public void setImageServer( final Supplier<String> imageServer ) {
       assert imageServer != null;
       mImageServer = imageServer;
+    }
     public void setFontsPath( final Supplier<File> fontsPath ) {
       assert fontsPath != null;
       mFontsPath = () -> {
         final var dir = fontsPath.get();
         return (dir == null ? USER_DIRECTORY : dir).toPath();
       };
+    }
     public void setExportFormat( final ExportFormat exportFormat ) {
       assert exportFormat != null;
       mExportFormat = exportFormat;
+    }
     public void setConcatenate( final boolean concatenate ) {
       mConcatenate = concatenate;
+    }
     public void setLocale( final Supplier<Locale> locale ) {
       assert locale != null;
       mLocale = locale;
+    }
     /**
      * Sets the list of fully interpolated key-value pairs to use when
      * substituting variable names back into the document as variable values.
      * This uses a {@link Callable} reference so that GUI and command-line
      * usage can insert their respective behaviours. That is, this method
      * prevents coupling the GUI to the CLI.
+     *
      * @param supplier Defines how to retrieve the definitions.
      */
     public void setDefinitions( final Supplier<Map<String, String>> supplier ) {
       assert supplier != null;
       mDefinitions = supplier;
+    }
     public void setMetadata( final Supplier<Map<String, String>> metadata ) {
       assert metadata != null;
       mMetadata = metadata.get() == null ? HashMap::new : metadata;
+    }
     /**
      * Sets the source for deriving the {@link Caret}. Typically, this is
      * the text editor that has focus.
+     *
      * @param caret The source for the currently active caret.
      */
     public void setCaret( final Supplier<Caret> caret ) {
       assert caret != null;
       mCaret = caret;
+    }
     public void setSigilBegan( final Supplier<String> sigilBegan ) {
       assert sigilBegan != null;
       mSigilBegan = sigilBegan;
+    }
     public void setSigilEnded( final Supplier<String> sigilEnded ) {
       assert sigilEnded != null;
       mSigilEnded = sigilEnded;
+    }
     public void setRWorkingDir( final Supplier<Path> rWorkingDir ) {
       assert rWorkingDir != null;
       mRWorkingDir = rWorkingDir;
+    }
     public void setRScript( final Supplier<String> rScript ) {
       assert rScript != null;
       mRScript = rScript;
+    }
     public void setCurlQuotes( final Supplier<Boolean> curlQuotes ) {
       assert curlQuotes != null;
       mCurlQuotes = curlQuotes;
+    }
     public void setAutoRemove( final Supplier<Boolean> autoRemove ) {
       assert autoRemove != null;
       mAutoRemove = autoRemove;
+    }
     private boolean isExportFormat( final ExportFormat format ) {
       return mExportFormat == format;
+    }
+  }
   public static GenericBuilder<Mutator, ProcessorContext> builder() {
     return GenericBuilder.of( Mutator::new, ProcessorContext::new );
+  }
   /**
    * Creates a new context for use by the {@link ProcessorFactory} when
    * instantiating new {@link Processor} instances. Although all the
    * parameters are required, not all {@link Processor} instances will use
    * all parameters.
    */
   private ProcessorContext( final Mutator mutator ) {
     assert mutator != null;
     mMutator = mutator;
+  }
   public Path getSourcePath() {
     return mMutator.mSourcePath;
+  }
   /**
    * Fully qualified file name to use when exporting (e.g., document.pdf).
+   *
    * @return Full path to a file name.
    */
   public Path getTargetPath() {
     return mMutator.mTargetPath;
+  }
   public ExportFormat getExportFormat() {
     return mMutator.mExportFormat;
+  }
   public Locale getLocale() {
     return mMutator.mLocale.get();
+  }
   /**
    * Returns the variable map of definitions, without interpolation.
+   *
    * @return A map to help dereference variables.
    */
   public Map<String, String> getDefinitions() {
     return mMutator.mDefinitions.get();
+  }
   /**
    * Returns the variable map of definitions, with interpolation.
+   *
    * @return A map to help dereference variables.
    */
   public InterpolatingMap getInterpolatedDefinitions() {
     return new InterpolatingMap(
       createDefinitionKeyOperator(), getDefinitions()
     ).interpolate();
+  }
   public Map<String, String> getMetadata() {
     return mMutator.mMetadata.get();
+  }
   /**
    * Returns the current caret position in the document being edited and is
    * always up-to-date.
+   *
    * @return Caret position in the document.
    */
   public Supplier<Caret> getCaret() {
     return mMutator.mCaret;
+  }
   /**
    * Returns the directory that contains the file being edited. When
    * {@link Constants#DOCUMENT_DEFAULT} is created, the parent path is
    * {@code null}. This will get absolute path to the file before trying to
    * get te parent path, which should always be a valid path. In the unlikely
    * event that the base path cannot be determined by the path alone, the
    * default user directory is returned. This is necessary for the creation
    * of new files.
+   *
    * @return Path to the directory containing a file being edited, or the
    * default user directory if the base path cannot be determined.
    */
   public Path getBaseDir() {
     final var path = getSourcePath().toAbsolutePath().getParent();
     return path == null ? DEFAULT_DIRECTORY : path;
+  }
   FileType getSourceFileType() {
     return lookup( getSourcePath() );
+  }
   public Path getThemesPath() {
     return mMutator.mThemesPath.get();
+  }
   public Path getImagesPath() {
     return mMutator.mImagesPath.get();
+  }
   public Path getCachesPath() {
     return mMutator.mCachesPath.get();
+  }
   public Iterable<String> getImageOrder() {
     assert mMutator.mImageOrder != null;
     final var order = mMutator.mImageOrder.get();
     final var token = order.contains( "," ) ? ',' : ' ';
     return Splitter.on( token ).split( token + order );
+  }
   public String getImageServer() {
     return mMutator.mImageServer.get();
+  }
   public Path getFontsPath() {
     return mMutator.mFontsPath.get();
+  }
   public boolean getAutoRemove() {
     return mMutator.mAutoRemove.get();
+  }
   public Path getRWorkingDir() {
     return mMutator.mRWorkingDir.get();
+  }
   public String getRScript() {
     return mMutator.mRScript.get();
+  }
   public boolean getCurlQuotes() {
     return mMutator.mCurlQuotes.get();
+  }
   /**
    * Answers whether to process a single text file or all text files in
    * the same directory as a single text file. See {@link #getSourcePath()}
    * for the file to process (or all files in its directory).
+   *
    * @return {@code true} means to process all text files, {@code false}
    * means to process a single file.
    */
   public boolean getConcatenate() {
     return mMutator.mConcatenate;
+  }
   public SigilKeyOperator createKeyOperator() {
     return createKeyOperator( getSourcePath() );
+  }
   /**
    * Returns the sigil operator for the given {@link Path}.
+   *
    * @param path The type of file being edited, from its extension.
    */
   private SigilKeyOperator createKeyOperator( final Path path ) {
     assert path != null;
     return valueFrom( path ) == TEXT_PROPERTIES
       ? createPropertyKeyOperator()
       : createDefinitionKeyOperator();
+  }
   private SigilKeyOperator createPropertyKeyOperator() {
     return new PropertyKeyOperator();
+  }
   private SigilKeyOperator createDefinitionKeyOperator() {
     final var began = mMutator.mSigilBegan.get();
     final var ended = mMutator.mSigilEnded.get();
     return new SigilKeyOperator( began, ended );
+  }
+}

A src/main/java/com/keenwrite/processors/ProcessorFactory.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 import com.keenwrite.processors.markdown.MarkdownProcessor;
 import static com.keenwrite.io.FileType.RMARKDOWN;
 import static com.keenwrite.io.FileType.SOURCE;
 import static com.keenwrite.processors.IdentityProcessor.IDENTITY;
 /**
  * Responsible for creating processors capable of parsing, transforming,
  * interpolating, and rendering known file types.
  */
 public final class ProcessorFactory {
   private ProcessorFactory() {
+  }
   public static Processor<String> createProcessors(
     final ProcessorContext context ) {
     return createProcessors( context, null );
+  }
   /**
    * Creates a new {@link Processor} chain suitable for parsing and rendering
    * the file opened at the given tab.
+   *
    * @param context The tab containing a text editor, path, and caret position.
    * @return A processor that can render the given tab's text.
    */
   public static Processor<String> createProcessors(
     final ProcessorContext context, final Processor<String> preview ) {
     return createProcessor( context, preview );
+  }
   /**
    * Constructs processors that chain various processing operations on a
    * document to generate a transformed version of the source document.
+   *
    * @param context Parameters needed to construct various processors.
    * @param preview The processor to use when no export format is specified.
    */
   private static Processor<String> createProcessor(
     final ProcessorContext context, final Processor<String> preview ) {
     // If the content is not to be exported, then the successor processor
     // is one that parses Markdown into HTML and passes the string to the
     // HTML preview pane.
     //
     // Otherwise, bolt on a processor that---after the interpolation and
     // substitution phase, which includes text strings or R code---will
     // generate HTML or plain Markdown. HTML has a few output formats:
     // with embedded SVG representing formulas, or without any conversion
     // to SVG. Without conversion would require client-side rendering of
     // math (such as using the JavaScript-based KaTeX engine).
     final var outputType = context.getExportFormat();
     final var successor = switch( outputType ) {
       case NONE -> preview;
       case XHTML_TEX -> createXhtmlProcessor( context );
       case APPLICATION_PDF -> createPdfProcessor( context );
       default -> createIdentityProcessor( context );
     };
     final var inputType = context.getSourceFileType();
     final Processor<String> processor;
     // When there's no preview, convert to HTML.
     if( preview == null ) {
       processor = createMarkdownProcessor( successor, context );
+    }
     else {
       processor = inputType == SOURCE || inputType == RMARKDOWN
         ? createMarkdownProcessor( successor, context )
         : createPreformattedProcessor( successor );
+    }
     return new ExecutorProcessor<>( processor );
+  }
   /**
    * Instantiates a new {@link Processor} that has no successor and returns
    * the string it was given without modification.
+   *
    * @return An instance of {@link Processor} that performs no processing.
    */
   @SuppressWarnings( "unused" )
   private static Processor<String> createIdentityProcessor(
     final ProcessorContext ignored ) {
     return IDENTITY;
+  }
   /**
    * Instantiates a {@link Processor} responsible for parsing Markdown and
    * definitions.
+   *
    * @return A chain of {@link Processor}s for processing Markdown and
    * definitions.
    */
   private static Processor<String> createMarkdownProcessor(
     final Processor<String> successor,
     final ProcessorContext context ) {
     final var dp = createVariableProcessor( successor, context );
     return MarkdownProcessor.create( dp, context );
+  }
   private static Processor<String> createVariableProcessor(
     final Processor<String> successor,
     final ProcessorContext context ) {
     return new VariableProcessor( successor, context );
+  }
   /**
    * Instantiates a new {@link Processor} that wraps an HTML document into
    * its final, well-formed state (including head and body tags). This is
    * useful for generating XHTML documents suitable for typesetting (using
    * an engine such as LuaTeX).
+   *
    * @return An instance of {@link Processor} that completes an HTML document.
    */
   private static Processor<String> createXhtmlProcessor(
     final ProcessorContext context ) {
     return createXhtmlProcessor( IDENTITY, context );
+  }
   private static Processor<String> createXhtmlProcessor(
     final Processor<String> successor, final ProcessorContext context ) {
     return new XhtmlProcessor( successor, context );
+  }
   private static Processor<String> createPdfProcessor(
     final ProcessorContext context ) {
     final var pdfp = new PdfProcessor( context );
     return createXhtmlProcessor( pdfp, context );
+  }
   private static Processor<String> createPreformattedProcessor(
     final Processor<String> successor ) {
     return new PreformattedProcessor( successor );
+  }
+}

A src/main/java/com/keenwrite/processors/VariableProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.Function;
 import java.util.function.UnaryOperator;
 import static com.keenwrite.processors.text.TextReplacementFactory.replace;
 /**
  * Processes interpolated string definitions in the document and inserts
  * their values into the post-processed text. The default variable syntax is
  * <pre>{{variable}}</pre> (a.k.a., moustache syntax).
  */
 public class VariableProcessor
   extends ExecutorProcessor<String> implements Function<String, String> {
   private final ProcessorContext mContext;
   private final UnaryOperator<String> mSigilOperator;
   /**
    * Constructs a processor capable of interpolating string definitions.
+   *
    * @param successor Subsequent link in the processing chain.
    * @param context   Contains resolved definitions map.
    */
   public VariableProcessor(
     final Processor<String> successor,
     final ProcessorContext context ) {
     super( successor );
     mContext = context;
     mSigilOperator = createKeyOperator( context );
+  }
   /**
    * Subclasses may change the type of operation performed on keys, such as
    * wrapping key names in sigils.
+   *
    * @param context Provides the name of the file being edited.
    * @return An operator for transforming key names.
    */
   protected UnaryOperator<String> createKeyOperator(
     final ProcessorContext context ) {
     return context.createKeyOperator();
+  }
   /**
    * Returns the map to use for variable substitution.
+   *
    * @return A map of variable names to values, with keys wrapped in sigils.
    */
   protected Map<String, String> getDefinitions() {
     return entoken( mContext.getInterpolatedDefinitions() );
+  }
   /**
    * Subclasses may override this method to change how keys are wrapped
    * in sigils.
+   *
    * @param key The key to enwrap.
    * @return The wrapped key.
    */
   protected String processKey( final String key ) {
     return mSigilOperator.apply( key );
+  }
   /**
    * Subclasses may override this method to modify values prior to use. This
    * can be used, for example, to escape values prior to evaluating by a
    * scripting engine.
+   *
    * @param value The value to process.
    * @return The processed value.
    */
   protected String processValue( final String value ) {
     return value;
+  }
   /**
    * Processes the given text document by replacing variables with their values.
+   *
    * @param text The document text that includes variables that should be
    *             replaced with values when rendered as HTML.
    * @return The text with all variables replaced.
    */
   @Override
   public String apply( final String text ) {
     assert text != null;
     return replace( text, getDefinitions() );
+  }
   /**
    * Converts the given map from regular variables to processor-specific
    * variables.
+   *
    * @param map Map of variable names to values.
    * @return Map of variables with the keys and values subjected to
    * post-processing.
    */
   protected Map<String, String> entoken( final Map<String, String> map ) {
     assert map != null;
     final var result = new HashMap<String, String>( map.size() );
     map.forEach( ( k, v ) -> result.put( processKey( k ), processValue( v ) ) );
     return result;
+  }
+}

A src/main/java/com/keenwrite/processors/XhtmlProcessor.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors;
 import com.keenwrite.dom.DocumentParser;
 import com.keenwrite.io.MediaTypeExtension;
 import com.keenwrite.ui.heuristics.WordCounter;
 import com.keenwrite.util.DataTypeConverter;
 import com.whitemagicsoftware.keenquotes.parser.Contractions;
 import com.whitemagicsoftware.keenquotes.parser.Curler;
 import org.w3c.dom.Document;
 import java.io.FileNotFoundException;
 import java.nio.file.Path;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import static com.keenwrite.Bootstrap.APP_TITLE_ABBR;
 import static com.keenwrite.dom.DocumentParser.*;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.io.downloads.DownloadManager.open;
 import static com.keenwrite.util.ProtocolScheme.getProtocol;
 import static com.whitemagicsoftware.keenquotes.lex.FilterType.FILTER_XML;
 import static java.lang.String.format;
 import static java.lang.String.valueOf;
 import static java.nio.file.Files.copy;
 import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
 /**
  * Responsible for making an XHTML document complete by wrapping it with html
  * and body elements. This doesn't have to be super-efficient because it's
  * not run in real-time.
  */
 public final class XhtmlProcessor extends ExecutorProcessor<String> {
   private static final Curler sTypographer =
     new Curler( createContractions(), FILTER_XML, true );
   private final ProcessorContext mContext;
   public XhtmlProcessor(
     final Processor<String> successor, final ProcessorContext context ) {
     super( successor );
     assert context != null;
     mContext = context;
+  }
   /**
    * Responsible for producing a well-formed XML document complete with
    * metadata (title, author, keywords, copyright, and date).
+   *
    * @param html The HTML document to transform into an XHTML document.
    * @return The transformed HTML document.
    */
   @Override
   public String apply( final String html ) {
     clue( "Main.status.typeset.xhtml" );
     try {
       final var doc = parse( html );
       setMetaData( doc );
       visit( doc, "//img", node -> {
         try {
           final var attrs = node.getAttributes();
           final var attr = attrs.getNamedItem( "src" );
           if( attr != null ) {
             final var src = attr.getTextContent();
             final Path location;
             final Path imagesDir;
             // Download into a cache directory, which can be written to without
             // any possibility of overwriting local image files. Further, the
             // filenames are hashed as a second layer of protection.
             if( getProtocol( src ).isRemote() ) {
               location = downloadImage( src );
               imagesDir = getCachesPath();
+            }
             else {
               location = resolveImage( src );
               imagesDir = getImagesPath();
+            }
             final var relative = imagesDir.relativize( location );
             attr.setTextContent( relative.toString() );
+          }
         } catch( final Exception ex ) {
           clue( ex );
+        }
       } );
       final var document = DocumentParser.toString( doc );
       final var curl = mContext.getCurlQuotes();
       return curl ? sTypographer.apply( document ) : document;
     } catch( final Exception ex ) {
       clue( ex );
+    }
     return html;
+  }
   /**
    * Applies the metadata fields to the document.
+   *
    * @param doc The document to adorn with metadata.
    */
   private void setMetaData( final Document doc ) {
     final var metadata = createMetaDataMap( doc );
     final var title = metadata.get( "title" );
     visit( doc, "/html/head", node -> {
       // Insert <title>text</title> inside <head>.
       node.appendChild( createElement( doc, "title", title ) );
       // Insert each <meta name=x content=y /> inside <head>.
       metadata.entrySet().forEach(
         entry -> node.appendChild( createMeta( doc, entry ) )
       );
     } );
+  }
   /**
    * Generates document metadata, including word count.
+   *
    * @param doc The document containing the text to tally.
    * @return A map of metadata key/value pairs.
    */
   private Map<String, String> createMetaDataMap( final Document doc ) {
     final var result = new LinkedHashMap<String, String>();
     final var metadata = getMetadata();
     final var map = mContext.getInterpolatedDefinitions();
     metadata.forEach(
       ( key, value ) -> {
         final var interpolated = map.interpolate( value );
         if( !interpolated.isEmpty() ) {
           result.put( key, interpolated );
+        }
+      }
     );
     result.put( "count", wordCount( doc ) );
     return result;
+  }
   /**
    * The metadata is in list form because the user interface for entering the
    * key-value pairs is a table, which requires a generic {@link List} rather
    * than a generic {@link Map}.
+   *
    * @return The document metadata.
    */
   private Map<String, String> getMetadata() {
     return mContext.getMetadata();
+  }
   /**
    * Hashes the URL so that the number of files doesn't eat up disk space
    * over time. For static resources, a feature could be added to prevent
    * downloading the URL if the hashed filename already exists.
+   *
    * @param src The source file's URL to download.
    * @return A {@link Path} to the local file containing the URL's contents.
    * @throws Exception Could not download or save the file.
    */
   private Path downloadImage( final String src ) throws Exception {
     final Path imageFile;
     final var cachesPath = getCachesPath();
     clue( "Main.status.image.xhtml.image.download", src );
     try( final var response = open( src ) ) {
       final var mediaType = response.getMediaType();
       final var ext = MediaTypeExtension.valueFrom( mediaType ).getExtension();
       final var hash = DataTypeConverter.toHex( DataTypeConverter.hash( src ) );
       final var id = hash.toLowerCase();
       imageFile = cachesPath.resolve( APP_TITLE_ABBR + id + '.' + ext );
       // Preserve image files if auto-remove is turned off.
       if( autoRemove() ) {
         imageFile.toFile().deleteOnExit();
+      }
       try( final var image = response.getInputStream() ) {
         copy( image, imageFile, REPLACE_EXISTING );
+      }
       if( mediaType.isSvg() ) {
         sanitize( imageFile );
+      }
+    }
     return imageFile;
+  }
   private Path resolveImage( final String src ) throws Exception {
     var imagePath = getImagesPath();
     var found = false;
     Path imageFile = null;
     clue( "Main.status.image.xhtml.image.resolve", src );
     for( final var extension : getImageOrder() ) {
       final var filename = format(
         "%s%s%s", src, extension.isBlank() ? "" : ".", extension );
       imageFile = imagePath.resolve( filename );
       if( imageFile.toFile().exists() ) {
         found = true;
         break;
+      }
+    }
     if( !found ) {
       imagePath = getDocumentDir();
       imageFile = imagePath.resolve( src );
       if( !imageFile.toFile().exists() ) {
         final var filename = imageFile.toString();
         clue( "Main.status.image.xhtml.image.missing", filename );
         throw new FileNotFoundException( filename );
+      }
+    }
     clue( "Main.status.image.xhtml.image.found", imageFile.toString() );
     return imageFile;
+  }
   private Path getImagesPath() {
     return mContext.getImagesPath();
+  }
   private Path getCachesPath() {
     return mContext.getCachesPath();
+  }
   /**
    * By including an "empty" extension, the first element returned
    * will be the empty string. Thus, the first extension to try is the
    * file's default extension. Subsequent iterations will try to find
    * a file that has a name matching one of the preferred extensions.
+   *
    * @return A list of extensions, including an empty string at the start.
    */
   private Iterable<String> getImageOrder() {
     return mContext.getImageOrder();
+  }
   /**
    * Returns the absolute path to the document being edited, which can be used
    * to find files included using relative paths.
+   *
    * @return The directory containing the edited file.
    */
   private Path getDocumentDir() {
     return mContext.getBaseDir();
+  }
   private Locale getLocale() {
     return mContext.getLocale();
+  }
   private boolean autoRemove() {
     return mContext.getAutoRemove();
+  }
   private String wordCount( final Document doc ) {
     final var sb = new StringBuilder( 65536 * 10 );
     visit(
       doc,
       "//*[normalize-space( text() ) != '']",
       node -> sb.append( node.getTextContent() )
     );
     return valueOf( WordCounter.create( getLocale() ).count( sb.toString() ) );
+  }
   /**
    * Creates contracts with a custom set of unambiguous strings.
+   *
    * @return List of contractions to use for curling straight quotes.
    */
   private static Contractions createContractions() {
     return new Contractions.Builder().build();
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/BaseMarkdownProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown;
 import com.keenwrite.dom.DocumentConverter;
 import com.keenwrite.processors.ExecutorProcessor;
 import com.keenwrite.processors.Processor;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.markdown.extensions.fences.FencedDivExtension;
 import com.keenwrite.processors.markdown.extensions.r.RInlineExtension;
 import com.vladsch.flexmark.ext.definition.DefinitionExtension;
 import com.vladsch.flexmark.ext.gfm.strikethrough.StrikethroughSubscriptExtension;
 import com.vladsch.flexmark.ext.superscript.SuperscriptExtension;
 import com.vladsch.flexmark.ext.tables.TablesExtension;
 import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.parser.Parser;
 import com.vladsch.flexmark.util.ast.IParse;
 import com.vladsch.flexmark.util.ast.IRender;
 import com.vladsch.flexmark.util.ast.Node;
 import com.vladsch.flexmark.util.data.MutableDataSet;
 import com.vladsch.flexmark.util.misc.Extension;
 import java.util.ArrayList;
 import java.util.List;
 /**
  * Responsible for parsing and rendering Markdown into HTML. This is required
  * to break a circular dependency between the {@link MarkdownProcessor} and
  * {@link RInlineExtension}.
  */
 public class BaseMarkdownProcessor extends ExecutorProcessor<String> {
   private final IParse mParser;
   private final IRender mRenderer;
   public BaseMarkdownProcessor(
     final Processor<String> successor, final ProcessorContext context ) {
     super( successor );
     final var options = new MutableDataSet();
     options.set( HtmlRenderer.GENERATE_HEADER_ID, true );
     options.set( HtmlRenderer.RENDER_HEADER_ID, true );
     final var builder = Parser.builder( options );
     final var extensions = createExtensions( context );
     mParser = builder.extensions( extensions ).build();
     mRenderer = HtmlRenderer
       .builder( options )
       .extensions( extensions )
       .build();
+  }
   /**
    * Instantiates a number of extensions to be applied when parsing.
+   *
    * @param context The context that subclasses use to configure custom
    *                extension behaviour.
    * @return A {@link List} of {@link Extension} instances that change the
    * {@link Parser}'s behaviour.
    */
   List<Extension> createExtensions( final ProcessorContext context ) {
     final var extensions = new ArrayList<Extension>();
     extensions.add( DefinitionExtension.create() );
     extensions.add( StrikethroughSubscriptExtension.create() );
     extensions.add( SuperscriptExtension.create() );
     extensions.add( TablesExtension.create() );
     extensions.add( FencedDivExtension.create() );
     return extensions;
+  }
   /**
    * Converts the given Markdown string into HTML, without the doctype, html,
    * head, and body tags.
+   *
    * @param markdown The string to convert from Markdown to HTML.
    * @return The HTML representation of the Markdown document.
    */
   @Override
   public String apply( final String markdown ) {
     return toXhtml( toHtml( parse( markdown ) ) );
+  }
   /**
    * Returns the AST in the form of a node for the given Markdown document. This
    * can be used, for example, to determine if a hyperlink exists inside a
    * paragraph.
+   *
    * @param markdown The Markdown to convert into an AST.
    * @return The Markdown AST for the given text (usually a paragraph).
    */
   public Node toNode( final String markdown ) {
     return parse( markdown );
+  }
   /**
    * Returns the result of converting the given AST into an HTML string.
+   *
    * @param node The AST {@link Node} to convert to an HTML string.
    * @return The given {@link Node} as an HTML string.
    */
   public String toHtml( final Node node ) {
     return getRenderer().render( node );
+  }
   /**
    * Ensures that subsequent processing will receive a well-formed document.
    * That is, an XHTML document.
+   *
    * @param html Document to transform (may contain unbalanced HTML tags).
    * @return A well-formed (balanced) equivalent HTML document.
    */
   private String toXhtml( final String html ) {
     return DocumentConverter.parse( html ).html();
+  }
   /**
    * Helper method to create an AST given some Markdown.
+   *
    * @param markdown The Markdown to parse.
    * @return The root node of the Markdown tree.
    */
   private Node parse( final String markdown ) {
     return getParser().parse( markdown );
+  }
   /**
    * Creates the Markdown document processor.
+   *
    * @return An instance of {@link IParse} for building abstract syntax trees.
    */
   private IParse getParser() {
     return mParser;
+  }
   private IRender getRenderer() {
     return mRenderer;
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/MarkdownProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown;
 import com.keenwrite.ExportFormat;
 import com.keenwrite.io.MediaType;
 import com.keenwrite.processors.Processor;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.VariableProcessor;
 import com.keenwrite.processors.markdown.extensions.CaretExtension;
 import com.keenwrite.processors.markdown.extensions.DocumentOutlineExtension;
 import com.keenwrite.processors.markdown.extensions.ImageLinkExtension;
 import com.keenwrite.processors.markdown.extensions.fences.FencedBlockExtension;
 import com.keenwrite.processors.markdown.extensions.r.RInlineExtension;
 import com.keenwrite.processors.markdown.extensions.tex.TeXExtension;
 import com.keenwrite.processors.r.RInlineEvaluator;
 import com.keenwrite.processors.r.RVariableProcessor;
 import com.vladsch.flexmark.util.misc.Extension;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.Function;
 import static com.keenwrite.io.MediaType.TEXT_R_MARKDOWN;
 import static com.keenwrite.processors.IdentityProcessor.IDENTITY;
 /**
  * Responsible for parsing a Markdown document and rendering it as HTML.
  */
 public final class MarkdownProcessor extends BaseMarkdownProcessor {
   private MarkdownProcessor(
     final Processor<String> successor, final ProcessorContext context ) {
     super( successor, context );
+  }
   public static MarkdownProcessor create( final ProcessorContext context ) {
     return create( IDENTITY, context );
+  }
   public static MarkdownProcessor create(
     final Processor<String> successor, final ProcessorContext context ) {
     return new MarkdownProcessor( successor, context );
+  }
   /**
    * Creating extensions based using an instance of {@link ProcessorContext}
    * indicates that the {@link CaretExtension} should be used to inject the
    * caret position into the final HTML document. This enables the HTML
    * preview pane to scroll to the same position, relatively speaking, within
    * the main document. Scrolling is developed this way to decouple the
    * document being edited from the preview pane so that multiple document
    * formats can be edited.
+   *
    * @param context Contains necessary information needed to create
    *                extensions used by the Markdown parser.
    * @return {@link List} of extensions invoked when parsing Markdown.
    */
   @Override
   List<Extension> createExtensions( final ProcessorContext context ) {
     final var inputPath = context.getSourcePath();
     final var mediaType = MediaType.valueFrom( inputPath );
     final Processor<String> processor;
     final Function<String, String> evaluator;
     final List<Extension> result = new ArrayList<>();
     if( mediaType == TEXT_R_MARKDOWN ) {
       final var rVarProcessor = new RVariableProcessor( IDENTITY, context );
       final var rInlineEvaluator = new RInlineEvaluator( rVarProcessor );
       result.add( RInlineExtension.create( rInlineEvaluator, context ) );
       processor = rVarProcessor;
       evaluator = rInlineEvaluator;
+    }
     else {
       processor = new VariableProcessor( IDENTITY, context );
       evaluator = processor;
+    }
     // Add typographic, table, strikethrough, and similar extensions.
     result.addAll( super.createExtensions( context ) );
     result.add( ImageLinkExtension.create( context ) );
     result.add( TeXExtension.create( evaluator, context ) );
     result.add( FencedBlockExtension.create( processor, evaluator, context ) );
     if( context.isExportFormat( ExportFormat.NONE ) ) {
       result.add( CaretExtension.create( context ) );
+    }
     result.add( DocumentOutlineExtension.create( processor ) );
     return result;
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/CaretExtension.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions;
 import com.keenwrite.editors.common.Caret;
 import com.keenwrite.constants.Constants;
 import com.keenwrite.processors.ProcessorContext;
 import com.vladsch.flexmark.ext.tables.TableBlock;
 import com.vladsch.flexmark.html.AttributeProvider;
 import com.vladsch.flexmark.html.AttributeProviderFactory;
 import com.vladsch.flexmark.html.IndependentAttributeProviderFactory;
 import com.vladsch.flexmark.html.renderer.AttributablePart;
 import com.vladsch.flexmark.html.renderer.LinkResolverContext;
 import com.vladsch.flexmark.util.ast.Node;
 import com.vladsch.flexmark.util.html.AttributeImpl;
 import com.vladsch.flexmark.util.html.MutableAttributes;
 import org.jetbrains.annotations.NotNull;
 import java.util.function.Supplier;
 import static com.keenwrite.constants.Constants.CARET_ID;
 import static com.keenwrite.processors.markdown.extensions.EmptyNode.EMPTY_NODE;
 import static com.vladsch.flexmark.html.HtmlRenderer.Builder;
 /**
  * Responsible for giving most block-level elements a unique identifier
  * attribute. The identifier is used to coordinate scrolling.
  */
 public class CaretExtension extends HtmlRendererAdapter {
   private final Supplier<Caret> mCaret;
   private CaretExtension( final ProcessorContext context ) {
     mCaret = context.getCaret();
+  }
   public static CaretExtension create( final ProcessorContext context ) {
     return new CaretExtension( context );
+  }
   @Override
   public void extend( @NotNull final Builder builder,
                       @NotNull final String rendererType ) {
     builder.attributeProviderFactory(
       IdAttributeProvider.createFactory( mCaret ) );
+  }
   /**
    * Responsible for creating the id attribute. This class is instantiated
    * once: for the HTML element containing the {@link Constants#CARET_ID}.
    */
   public static class IdAttributeProvider implements AttributeProvider {
     private final Supplier<Caret> mCaret;
     private boolean mAdded;
     public IdAttributeProvider( final Supplier<Caret> caret ) {
       mCaret = caret;
+    }
     private static AttributeProviderFactory createFactory(
       final Supplier<Caret> caret ) {
       return new IndependentAttributeProviderFactory() {
         @Override
         public @NotNull AttributeProvider apply(
           @NotNull final LinkResolverContext context ) {
           return new IdAttributeProvider( caret );
+        }
       };
+    }
     @Override
     public void setAttributes( @NotNull Node curr,
                                @NotNull AttributablePart part,
                                @NotNull MutableAttributes attributes ) {
       // Optimization: if a caret is inserted, don't try to find another.
       if( mAdded ) {
         return;
+      }
       final var caret = mCaret.get();
       // If a table block has been earmarked with an empty node, it means
       // another extension has generated code from an external source. The
       // Markdown processor won't be able to determine the caret position
       // with any semblance of accuracy, so skip the element. This usually
       // happens with tables, but in theory any Markdown generated from an
       // external source (e.g., an R script) could produce text that has no
       // caret position that can be calculated.
       var table = curr;
       if( !(curr instanceof TableBlock) ) {
         table = curr.getAncestorOfType( TableBlock.class );
+      }
       // The table was generated outside the document
       if( table != null && table.getLastChild() == EMPTY_NODE ) {
         return;
+      }
       final var outside = caret.isAfterText() ? 1 : 0;
       final var began = curr.getStartOffset();
       final var ended = curr.getEndOffset() + outside;
       final var prev = curr.getPrevious();
       // If the caret is within the bounds of the current node or the
       // caret is within the bounds of the end of the previous node and
       // the start of the current node, then mark the current node with
       // a caret indicator.
       if( caret.isBetweenText( began, ended ) ||
         prev != null && caret.isBetweenText( prev.getEndOffset(), began ) ) {
         // This line empowers synchronizing the text editor with the preview.
         attributes.addValue( AttributeImpl.of( "id", CARET_ID ) );
         // We're done until the user moves the caret (micro-optimization)
         mAdded = true;
+      }
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/DocumentOutlineExtension.java

 package com.keenwrite.processors.markdown.extensions;
 import com.keenwrite.events.ParseHeadingEvent;
 import com.keenwrite.processors.Processor;
 import com.vladsch.flexmark.ast.Heading;
 import com.vladsch.flexmark.parser.Parser.Builder;
 import com.vladsch.flexmark.parser.Parser.ParserExtension;
 import com.vladsch.flexmark.parser.block.NodePostProcessor;
 import com.vladsch.flexmark.parser.block.NodePostProcessorFactory;
 import com.vladsch.flexmark.util.ast.Document;
 import com.vladsch.flexmark.util.ast.Node;
 import com.vladsch.flexmark.util.ast.NodeTracker;
 import com.vladsch.flexmark.util.data.MutableDataHolder;
 import org.jetbrains.annotations.NotNull;
 import java.util.regex.Pattern;
 import static com.keenwrite.events.ParseHeadingEvent.fireNewOutlineEvent;
 public final class DocumentOutlineExtension implements ParserExtension {
   private static final Pattern sRegex = Pattern.compile( "^(#+)" );
   private final Processor<String> mProcessor;
   private DocumentOutlineExtension( final Processor<String> processor ) {
     mProcessor = processor;
+  }
   @Override
   public void parserOptions( final MutableDataHolder options ) {}
   @Override
   public void extend( final Builder builder ) {
     builder.postProcessorFactory( new Factory() );
+  }
   public static DocumentOutlineExtension create(
     final Processor<String> processor ) {
     return new DocumentOutlineExtension( processor );
+  }
   private class HeadingNodePostProcessor extends NodePostProcessor {
     @Override
     public void process(
       @NotNull final NodeTracker state, @NotNull final Node node ) {
       final var heading = mProcessor.apply( node.getChars().toString() );
       final var matcher = sRegex.matcher( heading );
       if( matcher.find() ) {
         final var level = matcher.group().length();
         final var text = heading.substring( level );
         final var offset = node.getStartOffset();
         ParseHeadingEvent.fire( level, text, offset );
+      }
+    }
+  }
   public class Factory extends NodePostProcessorFactory {
     public Factory() {
       super( false );
       addNodes( Heading.class );
+    }
     @NotNull
     @Override
     public NodePostProcessor apply( @NotNull final Document document ) {
       fireNewOutlineEvent();
       return new HeadingNodePostProcessor();
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/EmptyNode.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions;
 import com.vladsch.flexmark.util.ast.Node;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import org.jetbrains.annotations.NotNull;
 /**
  * The singleton is injected into the abstract syntax tree to mark an instance
  * of {@link Node} such that it must not be processed normally. Using a wrapper
  * for a given {@link Node} cannot work because the class type is used by
  * the parsing library for processing.
  */
 public final class EmptyNode extends Node {
   public static final Node EMPTY_NODE = new EmptyNode();
   private static final BasedSequence[] BASE_SEQ = new BasedSequence[ 0 ];
   private EmptyNode() {
+  }
   @Override
   public @NotNull BasedSequence[] getSegments() {
     return BASE_SEQ;
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/HtmlRendererAdapter.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions;
 import com.vladsch.flexmark.util.data.MutableDataHolder;
 import org.jetbrains.annotations.NotNull;
 import static com.vladsch.flexmark.html.HtmlRenderer.HtmlRendererExtension;
 /**
  * Hides the {@link #rendererOptions(MutableDataHolder)} from subclasses
  * that would otherwise implement the {@link HtmlRendererExtension} interface.
  */
 public abstract class HtmlRendererAdapter implements HtmlRendererExtension {
   /**
    * Empty, unused.
+   *
    * @param options Ignored.
    */
   @Override
   public void rendererOptions( @NotNull final MutableDataHolder options ) { }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/ImageLinkExtension.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions;
 import com.keenwrite.ExportFormat;
 import com.keenwrite.processors.ProcessorContext;
 import com.vladsch.flexmark.ast.Image;
 import com.vladsch.flexmark.html.IndependentLinkResolverFactory;
 import com.vladsch.flexmark.html.LinkResolver;
 import com.vladsch.flexmark.html.renderer.LinkResolverBasicContext;
 import com.vladsch.flexmark.html.renderer.ResolvedLink;
 import com.vladsch.flexmark.util.ast.Node;
 import org.jetbrains.annotations.NotNull;
 import java.io.File;
 import java.nio.file.Path;
 import static com.keenwrite.ExportFormat.NONE;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.util.ProtocolScheme.getProtocol;
 import static com.vladsch.flexmark.html.HtmlRenderer.Builder;
 import static com.vladsch.flexmark.html.renderer.LinkStatus.VALID;
 /**
  * Responsible for ensuring that images can be rendered relative to a path.
  * This allows images to be located virtually anywhere.
  */
 public class ImageLinkExtension extends HtmlRendererAdapter {
   private final ProcessorContext mContext;
   private ImageLinkExtension( @NotNull final ProcessorContext context ) {
     mContext = context;
+  }
   /**
    * Creates an extension capable of using a relative path to embed images.
+   *
    * @param context Contains the base directory to search in for images.
    * @return The new {@link ImageLinkExtension}, not {@code null}.
    */
   public static ImageLinkExtension create(
     @NotNull final ProcessorContext context ) {
     return new ImageLinkExtension( context );
+  }
   @Override
   public void extend( @NotNull final Builder builder,
                       @NotNull final String rendererType ) {
     builder.linkResolverFactory( new ResolverFactory() );
+  }
   private final class ResolverFactory extends IndependentLinkResolverFactory {
     @Override
     public @NotNull LinkResolver apply(
       @NotNull final LinkResolverBasicContext context ) {
       return new ImageLinkResolver();
+    }
+  }
   private class ImageLinkResolver implements LinkResolver {
     public ImageLinkResolver() {
+    }
     @NotNull
     @Override
     public ResolvedLink resolveLink(
       @NotNull final Node node,
       @NotNull final LinkResolverBasicContext context,
       @NotNull final ResolvedLink link ) {
       return node instanceof Image ? forImage( link, node ) : link;
+    }
     /**
      * Algorithm:
      * <ol>
      *   <li>Accept remote URLs as valid links.</li>
      *   <li>Accept existing readable files as valid links.</li>
      *   <li>Accept non-{@link ExportFormat#NONE} exports as valid links.</li>
      *   <li>Append the images dir to the edited file's dir (baseDir).</li>
      *   <li>Search for images by extension.</li>
      * </ol>
+     *
      * @param link The link URL to resolve.
      * @param node The document node containing the URL.
      * @return The {@link ResolvedLink} instance used to render the link.
      */
     private ResolvedLink forImage( final ResolvedLink link, final Node node ) {
       var uri = link.getUrl();
       final var protocol = getProtocol( uri );
       if( protocol.isRemote() ) {
         return valid( link, uri );
+      }
       final var baseDir = getBaseDir();
       // Determine the fully-qualified file name (fqfn).
       final var fqfn = Path.of( baseDir.toString(), uri ).toFile();
       if( fqfn.isFile() && fqfn.canRead() ||
         mContext.getExportFormat() != NONE ) {
         return valid( link, uri );
+      }
       try {
         // Compute the path to the image file. The base directory should
         // be an absolute path to the file being edited, without an extension.
         final var imagesDir = getImageDir();
         final var relativeDir = imagesDir.toString().isEmpty()
           ? imagesDir : baseDir.relativize( imagesDir );
         final var imageFile = Path.of(
           baseDir.toString(), relativeDir.toString(), uri );
         for( final var ext : getImageOrder() ) {
           var file = new File( imageFile.toString() + '.' + ext );
           if( file.exists() && file.canRead() ) {
             uri = file.toURI().toString();
             return valid( link, uri );
+          }
+        }
         clue( "Main.status.error.file.missing.near",
               imageFile + ".*", node.getLineNumber()
         );
       } catch( final Exception ex ) {
         clue( ex );
+      }
       return link;
+    }
     private ResolvedLink valid( final ResolvedLink link, final String url ) {
       return link.withStatus( VALID ).withUrl( url );
+    }
     private Path getImageDir() {
       return mContext.getImagesPath();
+    }
     private Iterable<String> getImageOrder() {
       return mContext.getImageOrder();
+    }
     private Path getBaseDir() {
       return mContext.getBaseDir();
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/fences/ClosingDivBlock.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.fences;
 import com.vladsch.flexmark.html.HtmlWriter;
 /**
  * Responsible for helping to generate a closing div element.
  */
 class ClosingDivBlock extends DivBlock {
   @Override
   void export( final HtmlWriter html ) {
     html.closeTag( HTML_DIV );
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/fences/DivBlock.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.fences;
 import com.vladsch.flexmark.html.HtmlWriter;
 import com.vladsch.flexmark.util.ast.Block;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import org.jetbrains.annotations.NotNull;
 abstract class DivBlock extends Block {
   static final CharSequence HTML_DIV = "div";
   @Override
   @NotNull
   public BasedSequence[] getSegments() {
     return EMPTY_SEGMENTS;
+  }
   /**
    * Append an opening or closing HTML div element to the given writer.
+   *
    * @param html Builds the HTML document to be written.
    */
   abstract void export( HtmlWriter html );
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/fences/FencedBlockExtension.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.fences;
 import com.keenwrite.preview.DiagramUrlGenerator;
 import com.keenwrite.processors.Processor;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.VariableProcessor;
 import com.keenwrite.processors.markdown.MarkdownProcessor;
 import com.keenwrite.processors.markdown.extensions.HtmlRendererAdapter;
 import com.keenwrite.processors.r.RChunkEvaluator;
 import com.keenwrite.processors.r.RVariableProcessor;
 import com.vladsch.flexmark.ast.FencedCodeBlock;
 import com.vladsch.flexmark.html.HtmlRendererOptions;
 import com.vladsch.flexmark.html.HtmlWriter;
 import com.vladsch.flexmark.html.renderer.*;
 import com.vladsch.flexmark.util.data.DataHolder;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.whitemagicsoftware.keenquotes.util.Tuple;
 import org.jetbrains.annotations.NotNull;
 import java.nio.file.Path;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.function.Function;
 import static com.keenwrite.Bootstrap.APP_TITLE_LOWERCASE;
 import static com.keenwrite.processors.IdentityProcessor.IDENTITY;
 import static com.vladsch.flexmark.html.HtmlRenderer.Builder;
 import static com.vladsch.flexmark.html.renderer.CoreNodeRenderer.CODE_CONTENT;
 import static com.vladsch.flexmark.html.renderer.LinkType.LINK;
 import static java.lang.String.format;
 /**
  * Responsible for converting textual diagram descriptions into HTML image
  * elements.
  */
 public final class FencedBlockExtension extends HtmlRendererAdapter {
   private static final String TEMP_DIR = System.getProperty( "java.io.tmpdir" );
   /**
    * Ensure that the device is always closed to prevent an out-of-resources
    * error, regardless of whether the R expression the user tries to evaluate
    * is valid by swallowing errors alongside a {@code finally} block.
    */
   private static final String R_SVG_EXPORT =
     "tryCatch({svg('%s'%s)%n%s%n},finally={dev.off()})%n";
   private static final String STYLE_DIAGRAM = "diagram-";
   private static final int STYLE_DIAGRAM_LEN = STYLE_DIAGRAM.length();
   private static final String STYLE_R_CHUNK = "{r";
   private static final class VerbatimRVariableProcessor
     extends RVariableProcessor {
     public VerbatimRVariableProcessor(
       final Processor<String> successor, final ProcessorContext context ) {
       super( successor, context );
+    }
     @Override
     protected String processValue( final String value ) {
       return value;
+    }
+  }
   private final RChunkEvaluator mRChunkEvaluator;
   private final Function<String, String> mInlineEvaluator;
   private final Processor<String> mRVariableProcessor;
   private final ProcessorContext mContext;
   public FencedBlockExtension(
     final Processor<String> processor,
     final Function<String, String> evaluator,
     final ProcessorContext context ) {
     assert processor != null;
     assert context != null;
     mContext = context;
     mRChunkEvaluator = new RChunkEvaluator();
     mInlineEvaluator = evaluator;
     mRVariableProcessor = new VerbatimRVariableProcessor( IDENTITY, context );
+  }
   /**
    * Creates a new parser for fenced blocks. This calls out to a web service
    * to generate SVG files of text diagrams.
    * <p>
    * Internally, this creates a {@link VariableProcessor} to substitute
    * variable definitions. This is necessary because the order of processors
    * matters. If the {@link VariableProcessor} comes before an instance of
    * {@link MarkdownProcessor}, for example, then the caret position in the
    * preview pane will not align with the caret position in the editor
    * pane. The {@link MarkdownProcessor} must come before all else. However,
    * when parsing fenced blocks, the variables within the block must be
    * interpolated before being sent to the diagram web service.
    * </p>
+   *
    * @param processor Used to pre-process the text.
    * @return A new {@link FencedBlockExtension} capable of shunting ASCII
    * diagrams to a service for conversion to SVG.
    */
   public static FencedBlockExtension create(
     final Processor<String> processor,
     final Function<String, String> evaluator,
     final ProcessorContext context ) {
     assert processor != null;
     assert context != null;
     return new FencedBlockExtension( processor, evaluator, context );
+  }
   @Override
   public void extend(
     @NotNull final Builder builder, @NotNull final String rendererType ) {
     builder.nodeRendererFactory( new Factory() );
+  }
   /**
    * Converts the given {@link BasedSequence} to a lowercase value.
+   *
    * @param text The character string to convert to lowercase.
    * @return The lowercase text value, or the empty string for no text.
    */
   private static String sanitize( final BasedSequence text ) {
     assert text != null;
     return text.toString().toLowerCase();
+  }
   /**
    * Responsible for generating images from a fenced block that contains a
    * diagram reference.
    */
   private class CustomRenderer implements NodeRenderer {
     @Override
     public Set<NodeRenderingHandler<?>> getNodeRenderingHandlers() {
       final var set = new HashSet<NodeRenderingHandler<?>>();
       set.add( new NodeRenderingHandler<>(
         FencedCodeBlock.class, ( node, context, html ) -> {
         final var style = sanitize( node.getInfo() );
         final Tuple<String, ResolvedLink> imagePair;
         if( style.startsWith( STYLE_DIAGRAM ) ) {
           imagePair = importTextDiagram( style, node, context );
           html.attr( "src", imagePair.item1() );
           html.withAttr( imagePair.item2() );
           html.tagVoid( "img" );
+        }
         else if( style.startsWith( STYLE_R_CHUNK ) ) {
           imagePair = evaluateRChunk( node, context );
           html.attr( "src", imagePair.item1() );
           html.withAttr( imagePair.item2() );
           html.tagVoid( "img" );
+        }
         else {
           // TODO: Revert to using context.delegateRender() after flexmark
           //   is updated to no longer trim blank lines up to the EOL.
           render( node, context, html );
+        }
       } ) );
       return set;
+    }
     private Tuple<String, ResolvedLink> importTextDiagram(
       final String style,
       final FencedCodeBlock node,
       final NodeRendererContext context ) {
       final var type = style.substring( STYLE_DIAGRAM_LEN );
       final var content = node.getContentChars().normalizeEOL();
       final var text = mInlineEvaluator.apply( content );
       final var server = mContext.getImageServer();
       final var source = DiagramUrlGenerator.toUrl( server, type, text );
       final var link = context.resolveLink( LINK, source, false );
       return new Tuple<>( source, link );
+    }
     /**
      * Evaluates an R expression. This will take into consideration any
      * key/value pairs passed in from the document, such as width and height
      * attributes of the form: <code>{r width=5 height=5}</code>.
+     *
      * @param node    The {@link FencedCodeBlock} to evaluate using R.
      * @param context Used to resolve the link that refers to any resulting
      *                image produced by the R chunk (such as a plot).
      * @return The SVG text string associated with the content produced by
      * the chunk (such as a graphical data plot).
      */
     @SuppressWarnings( "unused" )
     private Tuple<String, ResolvedLink> evaluateRChunk(
       final FencedCodeBlock node,
       final NodeRendererContext context ) {
       final var content = node.getContentChars().normalizeEOL().trim();
       final var text = mRVariableProcessor.apply( content );
       final var hash = Integer.toHexString( text.hashCode() );
       final var filename = format( "%s-%s.svg", APP_TITLE_LOWERCASE, hash );
       // The URI helps convert backslashes to forward slashes.
       final var uri = Path.of( TEMP_DIR, filename ).toUri();
       final var svg = uri.getPath();
       final var link = context.resolveLink( LINK, svg, false );
       final var dimensions = getAttributes( node.getInfo() );
       final var r = format( R_SVG_EXPORT, svg, dimensions, text );
       final var result = mRChunkEvaluator.apply( r );
       return new Tuple<>( svg, link );
+    }
     /**
      * Splits attributes of the form <code>{r key1=value2 key2=value2}</code>
      * into a comma-separated string containing only the key/value pairs,
      * such as <code>key1=value1,key2=value2</code>.
+     *
      * @param bs The complete line after the fenced block demarcation.
      * @return A comma-separated string of name/value pairs.
      */
     private String getAttributes( final BasedSequence bs ) {
       final var result = new StringBuilder();
       final var split = bs.splitList( " " );
       final var splits = split.size();
       for( var i = 1; i < splits; i++ ) {
         final var based = split.get( i ).toString();
         final var attribute = based.replace( '}', ' ' );
         // The order of attribute evaluations is in order of performance.
         if( !attribute.isBlank() &&
           attribute.indexOf( '=' ) > 1 &&
           attribute.matches( ".*\\d.*" ) ) {
           // The comma will do double-duty for separating individual attributes
           // as well as being the comma that separates all attributes from the
           // SVG image file name.
           result.append( ',' ).append( attribute );
+        }
+      }
       return result.toString();
+    }
     /**
      * This method is a stop-gap because blank lines that contain only
      * whitespace are collapsed into lines without any spaces. Consequently,
      * the typesetting software does not honour the blank lines, which
      * then would otherwise discard blank lines entirely.
      * <p>
      * Given the following:
+     *
      * <pre>
      *   if( bool ) {
+     *
+     *
      *   }
      * </pre>
      * <p>
      * The typesetter would otherwise render this incorrectly as:
+     *
      * <pre>
      *   if( bool ) {
      *   }
      * </pre>
      * <p>
      */
     private void render(
       final FencedCodeBlock node,
       final NodeRendererContext context,
       final HtmlWriter html ) {
       assert node != null;
       assert context != null;
       assert html != null;
       html.line();
       html.srcPosWithTrailingEOL( node.getChars() )
           .withAttr()
           .tag( "pre" )
           .openPre();
       final var options = context.getHtmlOptions();
       final var languageClass = lookupLanguageClass( node, options );
       if( !languageClass.isBlank() ) {
         html.attr( "class", languageClass );
+      }
       html.srcPosWithEOL( node.getContentChars() )
           .withAttr( CODE_CONTENT )
           .tag( "code" );
       final var lines = node.getContentLines();
       for( final var line : lines ) {
         if( line.isBlank() ) {
           html.text( "    " );
+        }
         html.text( line );
+      }
       html.tag( "/code" );
       html.tag( "/pre" )
           .closePre();
       html.lineIf( options.htmlBlockCloseTagEol );
+    }
     private String lookupLanguageClass(
       final FencedCodeBlock node,
       final HtmlRendererOptions options ) {
       assert node != null;
       assert options != null;
       final var info = node.getInfo();
       if( info.isNotNull() && !info.isBlank() ) {
         final var lang = node
           .getInfoDelimitedByAny( options.languageDelimiterSet )
           .unescape();
         return options
           .languageClassMap
           .getOrDefault( lang, options.languageClassPrefix + lang );
+      }
       return options.noLanguageClass;
+    }
+  }
   private class Factory implements DelegatingNodeRendererFactory {
     public Factory() { }
     @NotNull
     @Override
     public NodeRenderer apply( @NotNull final DataHolder options ) {
       return new CustomRenderer();
+    }
     /**
      * Return {@code null} to indicate this may delegate to the core renderer.
      */
     @Override
     public Set<Class<?>> getDelegates() {
       return null;
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/fences/FencedDivExtension.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.fences;
 import com.keenwrite.processors.markdown.extensions.HtmlRendererAdapter;
 import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.parser.Parser;
 import com.vladsch.flexmark.parser.block.*;
 import com.vladsch.flexmark.util.ast.Block;
 import com.vladsch.flexmark.util.data.DataHolder;
 import com.vladsch.flexmark.util.data.MutableDataHolder;
 import com.vladsch.flexmark.util.html.Attribute;
 import com.vladsch.flexmark.util.html.AttributeImpl;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import java.util.ArrayList;
 import java.util.Set;
 import java.util.regex.Pattern;
 import static com.vladsch.flexmark.parser.Parser.ParserExtension;
 /**
  * Responsible for parsing div block syntax into HTML div tags. Fenced div
  * blocks start with three or more consecutive colons, followed by a space,
  * followed by attributes. The attributes can be either a single word, or
  * multiple words nested in braces. For example:
+ *
  * <p>
  * ::: poem
  * Tyger Tyger, burning bright,
  * In the forests of the night;
  * What immortal hand or eye,
  * Could frame thy fearful symmetry?
  * :::
  * </p>
  * <p>
  * As well as:
  * </p>
  * <p>
  * ::: {#verse .p .d k=v author="Emily Dickinson"}
  * Because I could not stop for Death --
  * He kindly stopped for me --
  * The Carriage held but just Ourselves --
  * And Immortality.
  * :::
  * </p>
+ *
  * <p>
  * The second example produces the following starting {@code div} element:
  * </p>
  * <p>
  * &lt;div id="verse" class="p d" data-k="v" data-author="Emily Dickson"&gt;
  * </p>
  */
 public class FencedDivExtension extends HtmlRendererAdapter
   implements ParserExtension {
   /**
    * Matches any number of colons at start of line. This will match both the
    * opening and closing fences, with any number of colons.
    */
   private static final Pattern FENCE = Pattern.compile( "^:::.*" );
   /**
    * After a fenced div is detected, this will match the opening fence.
    */
   private static final Pattern FENCE_OPENING = Pattern.compile(
     "^:::+\\s+([\\p{IsAlphabetic}\\p{IsDigit}-_]+|\\{.+})\\s*$" );
   /**
    * Matches whether extended syntax is being used.
    */
   private static final Pattern ATTR_CSS = Pattern.compile( "\\{(.+)}" );
   /**
    * Matches either individual CSS definitions (id/class, {@code <d>}) or
    * key/value pairs ({@code <k>} and {@link <v>}). The key/value pair
    * will match optional quotes.
    */
   private static final Pattern ATTR_PAIRS = Pattern.compile(
     "\\s*" +
       "(?<d>[#.][\\p{IsAlphabetic}\\p{IsDigit}-_]+[^\\s=])|" +
       "((?<k>[\\p{IsAlphabetic}\\p{IsDigit}-_]+)=" +
       "\"*(?<v>(?<=\")[^\"]+(?=\")|([^\\s]+))\"*)" );
   public static FencedDivExtension create() {
     return new FencedDivExtension();
+  }
   @Override
   public void parserOptions( final MutableDataHolder options ) {
+  }
   @Override
   public void extend( final Parser.Builder builder ) {
     builder.customBlockParserFactory( new Factory() );
+  }
   /**
    * Creates a renderer that can generate HTML div elements.
+   *
    * @param builder      The document builder.
    * @param rendererType Indicates the document type to be built.
    */
   @Override
   public void extend( @NotNull final HtmlRenderer.Builder builder,
                       @NotNull final String rendererType ) {
     if( "HTML".equalsIgnoreCase( rendererType ) ) {
       builder.nodeRendererFactory( new FencedDivRenderer.Factory() );
+    }
+  }
   /**
    * Responsible for creating an instance of {@link ParserFactory}.
    */
   private static class Factory implements CustomBlockParserFactory {
     @Override
     public @NotNull BlockParserFactory apply(
       @NotNull final DataHolder options ) {
       return new ParserFactory( options );
+    }
     @Override
     public @Nullable Set<Class<?>> getAfterDependents() { return null; }
     @Override
     public @Nullable Set<Class<?>> getBeforeDependents() { return null; }
     @Override
     public boolean affectsGlobalScope() { return false; }
+  }
   /**
    * Responsible for creating a fenced div parser that is appropriate for the
    * type of fenced div encountered: opening or closing.
    */
   private static class ParserFactory extends AbstractBlockParserFactory {
     public ParserFactory( final DataHolder options ) {
       super( options );
+    }
     /**
      * Try to match an opening or closing fenced div.
+     *
      * @param state              Block parser state.
      * @param matchedBlockParser Last matched open block parser.
      * @return Wrapper for the opening or closing parser, upon finding :::.
      */
     @Override
     public BlockStart tryStart(
       final ParserState state, final MatchedBlockParser matchedBlockParser ) {
       return
         state.getIndent() == 0 && FENCE.matcher( state.getLine() ).matches()
           ? parseFence( state )
           : BlockStart.none();
+    }
     /**
      * After finding a fenced div, this will further disambiguate an opening
      * from a closing fence.
+     *
      * @param state Block parser state, contains line to parse.
      * @return Wrapper for the opening or closing parser, upon finding :::.
      */
     private BlockStart parseFence( final ParserState state ) {
       final var fence = FENCE_OPENING.matcher( state.getLine() );
       return BlockStart.of(
         fence.matches()
           ? new OpeningParser( fence.group( 1 ) )
           : new ClosingParser()
       ).atIndex( state.getIndex() );
+    }
+  }
   /**
    * Abstracts common {@link OpeningParser} and {@link ClosingParser} methods.
    */
   private static abstract class DivBlockParser extends AbstractBlockParser {
     @Override
     public BlockContinue tryContinue( final ParserState state ) {
       return BlockContinue.none();
+    }
     @Override
     public void closeBlock( final ParserState state ) {}
+  }
   /**
    * Responsible for creating an instance of {@link OpeningDivBlock}.
    */
   private static class OpeningParser extends DivBlockParser {
     private final OpeningDivBlock mBlock;
     /**
      * Parses the arguments upon construction.
+     *
      * @param args Text after :::, excluding leading/trailing whitespace.
      */
     public OpeningParser( final String args ) {
       final var attrs = new ArrayList<Attribute>();
       final var cssMatcher = ATTR_CSS.matcher( args );
       if( cssMatcher.matches() ) {
         // Split the text between braces into tokens and/or key-value pairs.
         final var pairMatcher = ATTR_PAIRS.matcher( cssMatcher.group( 1 ) );
         while( pairMatcher.find() ) {
           final var cssDef = pairMatcher.group( "d" );
           String cssAttrKey = "class";
           String cssAttrVal;
           // When no regular CSS definition (id or class), use key/value pairs.
           if( cssDef == null ) {
             cssAttrKey = "data-" + pairMatcher.group( "k" );
             cssAttrVal = pairMatcher.group( "v" );
+          }
           else {
             // This will strip the "#" and "." off the start of CSS definition.
             var index = 1;
             // Default CSS attribute name is "class", switch to "id" for #.
             if( cssDef.startsWith( "#" ) ) {
               cssAttrKey = "id";
+            }
             else if( !cssDef.startsWith( "." ) ) {
               index = 0;
+            }
             cssAttrVal = cssDef.substring( index );
+          }
           attrs.add( AttributeImpl.of( cssAttrKey, cssAttrVal ) );
+        }
+      }
       else {
         attrs.add( AttributeImpl.of( "class", args ) );
+      }
       mBlock = new OpeningDivBlock( attrs );
+    }
     @Override
     public Block getBlock() {
       return mBlock;
+    }
+  }
   /**
    * Responsible for creating an instance of {@link ClosingDivBlock}.
    */
   private static class ClosingParser extends DivBlockParser {
     private final ClosingDivBlock mBlock = new ClosingDivBlock();
     @Override
     public Block getBlock() {
       return mBlock;
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/fences/FencedDivRenderer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.fences;
 import com.vladsch.flexmark.html.HtmlWriter;
 import com.vladsch.flexmark.html.renderer.NodeRenderer;
 import com.vladsch.flexmark.html.renderer.NodeRendererContext;
 import com.vladsch.flexmark.html.renderer.NodeRendererFactory;
 import com.vladsch.flexmark.html.renderer.NodeRenderingHandler;
 import com.vladsch.flexmark.util.data.DataHolder;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import java.util.Set;
 /**
  * Responsible for rendering opening and closing fenced div blocks as HTMl
  * div elements.
  */
 class FencedDivRenderer implements NodeRenderer {
   @Override
   public @Nullable Set<NodeRenderingHandler<?>> getNodeRenderingHandlers() {
     return Set.of(
       new NodeRenderingHandler<>( OpeningDivBlock.class, this::render ),
       new NodeRenderingHandler<>( ClosingDivBlock.class, this::render )
     );
+  }
   /**
    * Renders the opening fenced div block as an HTML {@code <div>} element.
    */
   void render( final OpeningDivBlock node,
                final NodeRendererContext context,
                final HtmlWriter html ) {
     node.export( html );
+  }
   /**
    * Renders the closing fenced div block as an HTML {@code </div>} element.
    */
   void render( final ClosingDivBlock node,
                final NodeRendererContext context,
                final HtmlWriter html ) {
     node.export( html );
+  }
   static class Factory implements NodeRendererFactory {
     @Override
     public @NotNull NodeRenderer apply( @NotNull final DataHolder options ) {
       return new FencedDivRenderer();
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/fences/OpeningDivBlock.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.fences;
 import com.vladsch.flexmark.html.HtmlWriter;
 import com.vladsch.flexmark.util.html.Attribute;
 import java.util.ArrayList;
 import java.util.List;
 /**
  * Responsible for helping to generate an opening div element.
  */
 class OpeningDivBlock extends DivBlock {
   private final List<Attribute> mAttributes = new ArrayList<>();
   OpeningDivBlock( final List<Attribute> attributes ) {
     assert attributes != null;
     mAttributes.addAll( attributes );
+  }
   void export( final HtmlWriter html ) {
     mAttributes.forEach( html::attr );
     html.withAttr().tag( HTML_DIV );
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/r/RInlineExtension.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.r;
 import com.keenwrite.processors.Processor;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.markdown.BaseMarkdownProcessor;
 import com.keenwrite.processors.r.RInlineEvaluator;
 import com.vladsch.flexmark.ast.Paragraph;
 import com.vladsch.flexmark.parser.InlineParserExtensionFactory;
 import com.vladsch.flexmark.parser.delimiter.DelimiterProcessor;
 import com.vladsch.flexmark.parser.internal.InlineParserImpl;
 import com.vladsch.flexmark.parser.internal.LinkRefProcessorData;
 import com.vladsch.flexmark.util.data.DataHolder;
 import com.vladsch.flexmark.util.data.MutableDataHolder;
 import java.util.BitSet;
 import java.util.List;
 import java.util.Map;
 import static com.keenwrite.processors.IdentityProcessor.IDENTITY;
 import static com.vladsch.flexmark.parser.Parser.Builder;
 import static com.vladsch.flexmark.parser.Parser.ParserExtension;
 /**
  * Responsible for processing inline R statements (denoted using the
  * {@link RInlineEvaluator#PREFIX}) to prevent them from being converted to
  * HTML {@code <code>} elements and stop them from interfering with TeX
  * statements. Note that TeX statements are processed using a Markdown
  * extension, rather than an implementation of {@link Processor}. For this
  * reason, some pre-conversion is necessary.
  */
 public final class RInlineExtension implements ParserExtension {
   private final RInlineEvaluator mEvaluator;
   private final BaseMarkdownProcessor mMarkdownProcessor;
   private RInlineExtension(
     final RInlineEvaluator evaluator,
     final ProcessorContext context ) {
     mEvaluator = evaluator;
     mMarkdownProcessor = new BaseMarkdownProcessor( IDENTITY, context );
+  }
   /**
    * Creates an extension capable of intercepting R code blocks and preventing
    * them from being converted into HTML {@code <code>} elements.
    */
   public static RInlineExtension create(
     final RInlineEvaluator evaluator,
     final ProcessorContext context ) {
     return new RInlineExtension( evaluator, context );
+  }
   @Override
   public void extend( final Builder builder ) {
     builder.customInlineParserFactory( InlineParser::new );
+  }
   @Override
   public void parserOptions( final MutableDataHolder options ) {}
   /**
    * Prevents rendering {@code `r} statements as inline HTML {@code <code>}
    * blocks, which allows the {@link RInlineEvaluator} to post-process the
    * text prior to display in the preview pane. This intervention assists
    * with decoupling the caret from the Markdown content so that the two
    * can vary independently in the architecture while permitting synchronization
    * of the editor and preview pane.
    * <p>
    * The text is therefore processed twice: once by flexmark-java and once by
    * {@link RInlineEvaluator}.
    * </p>
    */
   private final class InlineParser extends InlineParserImpl {
     private InlineParser(
       final DataHolder options,
       final BitSet specialCharacters,
       final BitSet delimiterCharacters,
       final Map<Character, DelimiterProcessor> delimiterProcessors,
       final LinkRefProcessorData referenceLinkProcessors,
       final List<InlineParserExtensionFactory> inlineParserExtensions ) {
       super(
         options,
         specialCharacters,
         delimiterCharacters,
         delimiterProcessors,
         referenceLinkProcessors,
         inlineParserExtensions
       );
+    }
     /**
      * The superclass handles a number backtick parsing edge cases; this method
      * changes the behaviour to retain R code snippets, identified by
      * {@link RInlineEvaluator#PREFIX}, so that subsequent processing can
      * invoke R. If other languages are added, the {@link InlineParser} will
      * have to be rewritten to identify more than merely R.
+     *
      * @return The return value from {@link super#parseBackticks()}.
      * @inheritDoc
      */
     @Override
     protected boolean parseBackticks() {
       final var foundTicks = super.parseBackticks();
       if( foundTicks ) {
         final var blockNode = getBlock();
         final var codeNode = blockNode.getLastChild();
         if( codeNode != null ) {
           final var code = codeNode.getChars().toString();
           if( mEvaluator.test( code ) ) {
             codeNode.unlink();
             final var rText = mEvaluator.apply( code );
             var node = mMarkdownProcessor.toNode( rText );
             if( node.getFirstChild() instanceof Paragraph paragraph ) {
               node = paragraph.getFirstChild();
+            }
             if( node != null ) {
               blockNode.appendChild( node );
+            }
+          }
+        }
+      }
       return foundTicks;
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/tex/TeXExtension.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.tex;
 import com.keenwrite.ExportFormat;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.markdown.extensions.HtmlRendererAdapter;
 import com.keenwrite.processors.markdown.extensions.tex.TexNodeRenderer.Factory;
 import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.parser.Parser;
 import com.vladsch.flexmark.util.data.MutableDataHolder;
 import org.jetbrains.annotations.NotNull;
 import java.util.function.Function;
 import static com.vladsch.flexmark.parser.Parser.ParserExtension;
 /**
  * Responsible for wrapping delimited TeX code in Markdown into an XML element
  * that the HTML renderer can handle. For example, {@code $E=mc^2$} becomes
  * {@code <tex>E=mc^2</tex>} when passed to HTML renderer. The HTML renderer
  * is responsible for converting the TeX code for display. This avoids inserting
  * SVG code into the Markdown document, which the parser would then have to
  * iterate---a <em>very</em> wasteful operation that impacts front-end
  * performance.
  */
 public class TeXExtension extends HtmlRendererAdapter
   implements ParserExtension {
   /**
    * Responsible for pre-parsing the input.
    */
   private final Function<String, String> mEvaluator;
   /**
    * Controls how the node renderer produces TeX code within HTML output.
    */
   private final ExportFormat mExportFormat;
   private TeXExtension(
     final Function<String, String> evaluator, final ProcessorContext context  ) {
     mEvaluator = evaluator;
     mExportFormat = context.getExportFormat();
+  }
   /**
    * Creates an extension capable of handling delimited TeX code in Markdown.
+   *
    * @return The new {@link TeXExtension}, never {@code null}.
    */
   public static TeXExtension create(
     final Function<String, String> evaluator, final ProcessorContext context  ) {
     return new TeXExtension( evaluator, context );
+  }
   /**
    * Adds the TeX extension for HTML document export types.
+   *
    * @param builder      The document builder.
    * @param rendererType Indicates the document type to be built.
    */
   @Override
   public void extend( @NotNull final HtmlRenderer.Builder builder,
                       @NotNull final String rendererType ) {
     if( "HTML".equalsIgnoreCase( rendererType ) ) {
       builder.nodeRendererFactory( new Factory( mExportFormat, mEvaluator ) );
+    }
+  }
   @Override
   public void extend( final Parser.Builder builder ) {
     builder.customDelimiterProcessor( new TeXInlineDelimiterProcessor() );
+  }
   @Override
   public void parserOptions( final MutableDataHolder options ) {
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/tex/TeXInlineDelimiterProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.tex;
 import com.vladsch.flexmark.parser.InlineParser;
 import com.vladsch.flexmark.parser.core.delimiter.Delimiter;
 import com.vladsch.flexmark.parser.delimiter.DelimiterProcessor;
 import com.vladsch.flexmark.parser.delimiter.DelimiterRun;
 import com.vladsch.flexmark.util.ast.Node;
 public class TeXInlineDelimiterProcessor implements DelimiterProcessor {
   @Override
   public void process( final Delimiter opener,
                        final Delimiter closer,
                        final int delimitersUsed ) {
     final var node = new TexNode( opener, closer );
     opener.moveNodesBetweenDelimitersTo( node, closer );
+  }
   @Override
   public char getOpeningCharacter() {
     return '$';
+  }
   @Override
   public char getClosingCharacter() {
     return '$';
+  }
   @Override
   public int getMinLength() {
     return 1;
+  }
   /**
    * Allow for $ or $$.
+   *
    * @param opener One or more opening delimiter characters.
    * @param closer One or more closing delimiter characters.
    * @return The number of delimiters to use to determine whether a valid
    * opening delimiter expression is found.
    */
   @Override
   public int getDelimiterUse(
     final DelimiterRun opener, final DelimiterRun closer ) {
     return 1;
+  }
   @Override
   public boolean canBeOpener( final String before,
                               final String after,
                               final boolean leftFlanking,
                               final boolean rightFlanking,
                               final boolean beforeIsPunctuation,
                               final boolean afterIsPunctuation,
                               final boolean beforeIsWhitespace,
                               final boolean afterIsWhiteSpace ) {
     return leftFlanking;
+  }
   @Override
   public boolean canBeCloser( final String before,
                               final String after,
                               final boolean leftFlanking,
                               final boolean rightFlanking,
                               final boolean beforeIsPunctuation,
                               final boolean afterIsPunctuation,
                               final boolean beforeIsWhitespace,
                               final boolean afterIsWhiteSpace ) {
     return rightFlanking;
+  }
   @Override
   public Node unmatchedDelimiterNode(
     final InlineParser inlineParser, final DelimiterRun delimiter ) {
     return null;
+  }
   @Override
   public boolean skipNonOpenerCloser() {
     return false;
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/tex/TexNode.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.tex;
 import com.vladsch.flexmark.ast.DelimitedNodeImpl;
 import com.vladsch.flexmark.parser.core.delimiter.Delimiter;
 public class TexNode extends DelimitedNodeImpl {
   /**
    * TeX expression wrapped in a {@code <tex>} element.
    */
   public static final String HTML_TEX = "tex";
   public static final String TOKEN_OPEN = "$";
   public static final String TOKEN_CLOSE = "$";
   private final String mOpener;
   private final String mCloser;
   /**
    * Creates a new TeX node representation that can distinguish between '$'
    * and '$$' as opening/closing delimiters. The '$' is used for inline
    * TeX statements and '$$' is used for multi-line statements.
+   *
    * @param opener The opening delimiter.
    * @param closer The closing delimiter.
    */
   public TexNode( final Delimiter opener, final Delimiter closer ) {
     mOpener = getDelimiter( opener );
     mCloser = getDelimiter( closer );
+  }
   /**
    * @return Either '$' or '$$'.
    */
   public String getOpeningDelimiter() { return mOpener; }
   /**
    * @return Either '$' or '$$'.
    */
   public String getClosingDelimiter() { return mCloser; }
   private String getDelimiter( final Delimiter delimiter ) {
     return delimiter.getInput().subSequence(
       delimiter.getStartIndex(), delimiter.getEndIndex()
     ).toString();
+  }
+}

A src/main/java/com/keenwrite/processors/markdown/extensions/tex/TexNodeRenderer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown.extensions.tex;
 import com.keenwrite.ExportFormat;
 import com.keenwrite.preview.MathRenderer;
 import com.keenwrite.preview.SvgRasterizer;
 import com.vladsch.flexmark.html.HtmlWriter;
 import com.vladsch.flexmark.html.renderer.NodeRenderer;
 import com.vladsch.flexmark.html.renderer.NodeRendererContext;
 import com.vladsch.flexmark.html.renderer.NodeRendererFactory;
 import com.vladsch.flexmark.html.renderer.NodeRenderingHandler;
 import com.vladsch.flexmark.util.ast.Node;
 import com.vladsch.flexmark.util.data.DataHolder;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import java.util.Map;
 import java.util.Set;
 import java.util.function.Function;
 import static com.keenwrite.ExportFormat.*;
 import static com.keenwrite.processors.markdown.extensions.tex.TexNode.*;
 public class TexNodeRenderer {
   private static final RendererFacade RENDERER =
     new TexElementNodeRenderer( false );
   private static final Map<ExportFormat, RendererFacade> EXPORT_RENDERERS =
     Map.of(
       APPLICATION_PDF, new TexElementNodeRenderer( true ),
       HTML_TEX_SVG, new TexSvgNodeRenderer(),
       HTML_TEX_DELIMITED, new TexDelimNodeRenderer(),
       XHTML_TEX, new TexElementNodeRenderer( true ),
       NONE, RENDERER
     );
   public static class Factory implements NodeRendererFactory {
     private final RendererFacade mNodeRenderer;
     public Factory(
       final ExportFormat exportFormat,
       final Function<String, String> evaluator ) {
       mNodeRenderer = EXPORT_RENDERERS.getOrDefault( exportFormat, RENDERER );
       mNodeRenderer.setEvaluator( evaluator );
+    }
     @NotNull
     @Override
     public NodeRenderer apply( @NotNull final DataHolder options ) {
       return mNodeRenderer;
+    }
+  }
   private static abstract class RendererFacade
     implements NodeRenderer {
     private Function<String, String> mEvaluator;
     @Override
     public @Nullable Set<NodeRenderingHandler<?>> getNodeRenderingHandlers() {
       return Set.of(
         new NodeRenderingHandler<>( TexNode.class, this::render )
       );
+    }
     /**
      * Subclasses implement this method to render the content of {@link TexNode}
      * instances as per their associated {@link ExportFormat}.
+     *
      * @param node    {@link Node} containing text content of a math formula.
      * @param context Configuration information (unused).
      * @param html    Where to write the rendered output.
      */
     abstract void render( final TexNode node,
                           final NodeRendererContext context,
                           final HtmlWriter html );
     private void setEvaluator( final Function<String, String> evaluator ) {
       mEvaluator = evaluator;
+    }
     Function<String, String> getEvaluator() {
       return mEvaluator;
+    }
+  }
   /**
    * Responsible for rendering a TeX node as an HTML {@code <tex>}
    * element. This is the default behaviour.
    */
   private static class TexElementNodeRenderer extends RendererFacade {
     private final boolean mIncludeDelimiter;
     private TexElementNodeRenderer( final boolean includeDelimiter ) {
       mIncludeDelimiter = includeDelimiter;
+    }
     void render( final TexNode node,
                  final NodeRendererContext context,
                  final HtmlWriter html ) {
       final var text = getEvaluator().apply( node.getText().toString() );
       final var content =
         mIncludeDelimiter
           ? node.getOpeningDelimiter() + text + node.getClosingDelimiter()
           : text;
       html.tag( HTML_TEX );
       html.raw( content );
       html.closeTag( HTML_TEX );
+    }
+  }
   /**
    * Responsible for rendering a TeX node as an HTML {@code <svg>}
    * element.
    */
   private static class TexSvgNodeRenderer extends RendererFacade {
     void render( final TexNode node,
                  final NodeRendererContext context,
                  final HtmlWriter html ) {
       final var tex = node.getText().toStringOrNull();
       final var doc = MathRenderer.toDocument(
         tex == null ? "" : getEvaluator().apply( tex )
       );
       final var svg = SvgRasterizer.toSvg( doc.getDocumentElement() );
       html.raw( svg );
+    }
+  }
   /**
    * Responsible for rendering a TeX node as text bracketed by $ tokens.
    */
   private static class TexDelimNodeRenderer extends RendererFacade {
     void render( final TexNode node,
                  final NodeRendererContext context,
                  final HtmlWriter html ) {
       html.raw( TOKEN_OPEN );
       html.raw( getEvaluator().apply( node.getText().toString() ) );
       html.raw( TOKEN_CLOSE );
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/r/Engine.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.r;
 import com.keenwrite.collections.BoundedCache;
 import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import java.util.Map;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.events.StatusEvent.clue;
 import static java.lang.Math.min;
 /**
  * Responsible for executing R statements, which can also update the engine's
  * state.
  */
 public final class Engine {
   /**
    * Inline R expressions that have already been evaluated.
    */
   private static final Map<String, String> sCache =
     new BoundedCache<>( 512 );
   /**
    * Engine for evaluating R expressions.
    */
   private static final ScriptEngine sEngine =
     new ScriptEngineManager().getEngineByName( "Renjin" );
   /**
    * Empties the cache.
    */
   public static void clear() {
     sCache.clear();
+  }
   /**
    * Look up an R expression from the cache then return the resulting object.
    * If the R expression hasn't been cached, it'll first be evaluated.
+   *
    * @param r R expression to evaluate.
    * @return The object resulting from the evaluation.
    */
   public static String eval( final String r ) {
     return sCache.computeIfAbsent( r, __ -> evaluate( r ) );
+  }
   /**
    * Returns the result of an R expression as an object converted to string.
+   *
    * @param r R expression to evaluate.
    * @return The object resulting from the evaluation.
    */
   private static String evaluate( final String r ) {
     try {
       return sEngine.eval( r ).toString();
     } catch( final Exception ex ) {
       final var expr = r.substring( 0, min( r.length(), 50 ) );
       clue( get( "Main.status.error.r", expr, ex.getMessage() ), ex );
       throw new IllegalArgumentException( r );
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/r/RBootstrapController.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.r;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.sigils.RKeyOperator;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.Supplier;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preferences.AppKeys.KEY_R_DIR;
 import static com.keenwrite.preferences.AppKeys.KEY_R_SCRIPT;
 import static com.keenwrite.processors.r.RVariableProcessor.escape;
 import static com.keenwrite.processors.text.TextReplacementFactory.replace;
 /**
  * Transforms a document containing R statements into Markdown.
  */
 public final class RBootstrapController {
   private static final RKeyOperator KEY_OPERATOR = new RKeyOperator();
   private final Workspace mWorkspace;
   private final Supplier<Map<String, String>> mDefinitions;
   public RBootstrapController(
     final Workspace workspace,
     final Supplier<Map<String, String>> supplier ) {
     mWorkspace = workspace;
     mDefinitions = supplier;
     mWorkspace.stringProperty( KEY_R_SCRIPT )
               .addListener( ( c, o, n ) -> update() );
     mWorkspace.fileProperty( KEY_R_DIR )
               .addListener( ( c, o, n ) -> update() );
+  }
   /**
    * Updates the R code so that R can find imported libraries. Note that
    * any existing R functionality will not be overwritten if this method is
    * called multiple times.
    */
   public void update() {
     final var bootstrap = getRScript();
     if( !bootstrap.isBlank() ) {
       final var dir = getRWorkingDirectory();
       final var definitions = mDefinitions.get();
       final var map = new HashMap<String, String>( definitions.size() + 1 );
       definitions.forEach(
         ( k, v ) -> map.put( KEY_OPERATOR.apply( k ), escape( v ) )
       );
       map.put(
         KEY_OPERATOR.apply( "application.r.working.directory" ),
         escape( dir )
       );
       try {
         Engine.eval( replace( bootstrap, map ) );
       } catch( final Exception ex ) {
         clue( ex );
         // A problem with the bootstrap script is likely caused by variables
         // not being loaded. This implies that the R processor is being invoked
         // too soon.
+      }
+    }
+  }
   private String getRScript() {
     return mWorkspace.getString( KEY_R_SCRIPT );
+  }
   private String getRWorkingDirectory() {
     final var wd = mWorkspace.getFile( KEY_R_DIR );
     return wd.toString().replace( '\\', '/' );
+  }
+}

A src/main/java/com/keenwrite/processors/r/RChunkEvaluator.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.r;
 import java.util.function.Function;
 import static com.keenwrite.constants.Constants.STATUS_PARSE_ERROR;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Transforms a document containing R statements into Markdown. The statements
  * are part of an R chunk, <code>```{r}</code>.
  */
 public final class RChunkEvaluator implements Function<String, String> {
   /**
    * Constructs an evaluator capable of executing R statements.
    */
   public RChunkEvaluator() {}
   /**
    * Evaluates the given R statements and returns the result as a string.
    * If an image was produced, the calling code is responsible for persisting
    * and making the file embeddable into the document.
+   *
    * @param r The R statements to evaluate.
    * @return The output from the final R statement.
    */
   @Override
   public String apply( final String r ) {
     try {
       return Engine.eval( r );
     } catch( final Exception ex ) {
       clue( STATUS_PARSE_ERROR, ex.getMessage() );
       return r;
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/r/RInlineEvaluator.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.r;
 import com.keenwrite.processors.Processor;
 import java.util.function.Function;
 import java.util.function.Predicate;
 import static com.keenwrite.constants.Constants.STATUS_PARSE_ERROR;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Evaluates inline R statements.
  */
 public final class RInlineEvaluator
   implements Function<String, String>, Predicate<String> {
   public static final String PREFIX = "`r#";
   public static final String SUFFIX = "`";
   private static final int PREFIX_LENGTH = PREFIX.length();
   private final Processor<String> mProcessor;
   /**
    * Constructs an evaluator capable of executing R statements.
    */
   public RInlineEvaluator( final RVariableProcessor processor ) {
     mProcessor = processor;
+  }
   /**
    * Evaluates all R statements in the source document and inserts the
    * calculated value into the generated document.
+   *
    * @param text The document text that includes variables that should be
    *             replaced with values when rendered as HTML.
    * @return The generated document with output from all R statements
    * substituted with value returned from their execution.
    */
   @Override
   public String apply( final String text ) {
     try {
       final var buffer = new StringBuilder( text.length() );
       int index = 0;
       int began;
       int ended;
       while( (began = text.indexOf( PREFIX, index )) >= 0 ) {
         buffer.append( text, index, began );
         ended = text.indexOf( SUFFIX, began + 1 );
         if( ended > began ) {
           final var r = mProcessor.apply(
             text.substring( began + PREFIX_LENGTH, ended )
           );
           // Return the evaluated R expression for insertion back into the text.
           buffer.append( Engine.eval( r ) );
           index = ended + 1;
+        }
+      }
       buffer.append( text.substring( index ) );
       return buffer.toString();
     } catch( final Exception ex ) {
       clue( STATUS_PARSE_ERROR, ex.getMessage() );
       // If the string couldn't be parsed using R, append the statement
       // that failed to parse, instead of its evaluated value.
       return text;
+    }
+  }
   /**
    * Answers whether the engine associated with this evaluator may attempt to
    * evaluate the given source code statement.
+   *
    * @param code The source code to verify.
    * @return {@code true} if the code may be evaluated.
    */
   @Override
   public boolean test( final String code ) {
     return code.startsWith( PREFIX );
+  }
+}

A src/main/java/com/keenwrite/processors/r/RVariableProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.r;
 import com.keenwrite.processors.Processor;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.VariableProcessor;
 import com.keenwrite.sigils.RKeyOperator;
 import java.util.function.UnaryOperator;
 /**
  * Converts the keys of the resolved map from default form to R form, then
  * performs a substitution on the text. The default R variable syntax is
  * <pre>v$tree$leaf</pre>.
  */
 public class RVariableProcessor extends VariableProcessor {
   public RVariableProcessor(
     final Processor<String> successor, final ProcessorContext context ) {
     super( successor, context );
+  }
   @Override
   protected UnaryOperator<String> createKeyOperator(
     final ProcessorContext context ) {
     return new RKeyOperator();
+  }
   @Override
   protected String processValue( final String value ) {
     assert value != null;
     return escape( value );
+  }
   /**
    * In R, single quotes and double quotes are interchangeable. Using single
    * quotes is simpler to code.
+   *
    * @param value The text to convert into a valid quoted R string.
    * @return The quoted value with embedded quotes escaped as necessary.
    */
   public static String escape( final String value ) {
     return '\'' + escape( value, '\'', "\\'" ) + '\'';
+  }
   /**
    * TODO: Make generic method for replacing text.
+   *
    * @param haystack Search this string for the needle, must not be null.
    * @param needle   The character to find in the haystack.
    * @param thread   Replace the needle with this text, if the needle is found.
    * @return The haystack with the all instances of needle replaced with thread.
    */
   @SuppressWarnings( "SameParameterValue" )
   private static String escape(
     final String haystack, final char needle, final String thread ) {
     assert haystack != null;
     assert thread != null;
     int end = haystack.indexOf( needle );
     if( end < 0 ) {
       return haystack;
+    }
     int start = 0;
     // Replace up to 32 occurrences before reallocating the internal buffer.
     final var sb = new StringBuilder( haystack.length() + 32 );
     while( end >= 0 ) {
       sb.append( haystack, start, end ).append( thread );
       start = end + 1;
       end = haystack.indexOf( needle, start );
+    }
     return sb.append( haystack.substring( start ) ).toString();
+  }
+}

A src/main/java/com/keenwrite/processors/text/AbstractTextReplacer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.text;
 import java.util.Map;
 /**
  * Responsible for common behaviour across all text replacer implementations.
  */
 public abstract class AbstractTextReplacer implements TextReplacer {
   /**
    * Optimization: Cache keys until the map changes.
    */
   private String[] mKeys = new String[ 0 ];
   /**
    * Optimization: Cache values until the map changes.
    */
   private String[] mValues = new String[ 0 ];
   /**
    * Optimization: Detect when the map changes.
    */
   private int mMapHash;
   private final Object mMutex = new Object();
   /**
    * Default (empty) constructor.
    */
   protected AbstractTextReplacer() { }
   protected String[] keys( final Map<String, String> map ) {
     synchronized( mMutex ) {
       updateCache( map );
       return mKeys;
+    }
+  }
   protected String[] values( final Map<String, String> map ) {
     synchronized( mMutex ) {
       updateCache( map );
       return mValues;
+    }
+  }
   private void updateCache( final Map<String, String> map ) {
     synchronized( mMutex ) {
       if( map.hashCode() != mMapHash ) {
         mKeys = map.keySet().toArray( new String[ 0 ] );
         mValues = map.values().toArray( new String[ 0 ] );
         mMapHash = map.hashCode();
+      }
+    }
+  }
+}

A src/main/java/com/keenwrite/processors/text/AhoCorasickReplacer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.text;
 import java.util.Map;
 import static org.ahocorasick.trie.Trie.builder;
 /**
  * Replaces text using an Aho-Corasick algorithm.
  */
 public class AhoCorasickReplacer extends AbstractTextReplacer {
   /**
    * Default (empty) constructor.
    */
   protected AhoCorasickReplacer() { }
   @Override
   public String replace( final String text, final Map<String, String> map ) {
     assert text != null;
     assert map != null;
     // Create a buffer sufficiently large that re-allocations are minimized.
     final var sb = new StringBuilder( (int) (text.length() * 1.25) );
     // Definition names cannot overlap.
     final var builder = builder().ignoreOverlaps();
     final var keySet = keys( map );
     if( keySet != null ) {
       builder.addKeywords( keys( map ) );
+    }
     int index = 0;
     // Replace all instances with dereferenced variables.
     for( final var emit : builder.build().parseText( text ) ) {
       sb.append( text, index, emit.getStart() );
       sb.append( map.get( emit.getKeyword() ) );
       index = emit.getEnd() + 1;
+    }
     // Add the remainder of the string (contains no more matches).
     sb.append( text.substring( index ) );
     return sb.toString();
+  }
+}

A src/main/java/com/keenwrite/processors/text/StringUtilsReplacer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.text;
 import org.apache.commons.lang3.StringUtils;
 import java.util.Map;
 import static org.apache.commons.lang3.StringUtils.replaceEach;
 /**
  * Replaces text using a brute-force
  * {@link StringUtils#replaceEach(String, String[], String[])}} method.
  */
 public class StringUtilsReplacer extends AbstractTextReplacer {
   /**
    * Default (empty) constructor.
    */
   protected StringUtilsReplacer() { }
   @Override
   public String replace( final String text, final Map<String, String> map ) {
     return replaceEach( text, keys( map ), values( map ) );
+  }
+}

A src/main/java/com/keenwrite/processors/text/TextReplacementFactory.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.text;
 import java.util.Map;
 /**
  * Used to generate a class capable of efficiently replacing variable
  * definitions with their values.
  */
 public final class TextReplacementFactory {
   private static final TextReplacer APACHE = new StringUtilsReplacer();
   private static final TextReplacer AHO_CORASICK = new AhoCorasickReplacer();
   /**
    * Returns a text search/replacement instance that is reasonably optimal for
    * the given length of text.
+   *
    * @param length The length of text that requires some search and replacing.
    * @return A class that can search and replace text with utmost expediency.
    */
   public static TextReplacer getTextReplacer( final int length ) {
     // After about 1,500 characters, the Aho-Corsick algorithm is faster.
     return length < 1500 ? APACHE : AHO_CORASICK;
+  }
   /**
    * Convenience method to instantiate a suitable text replacer algorithm and
    * perform a replacement using the given map. At this point, the values should
    * be already dereferenced and ready to be substituted verbatim; any
    * recursively defined values must have been interpolated previously.
+   *
    * @param haystack The text containing zero or more variables to replace.
    * @param needles  The map of variables to their dereferenced values.
    * @return The text with all variables replaced.
    */
   public static String replace(
     final String haystack, final Map<String, String> needles ) {
     assert haystack != null;
     assert needles != null;
     return getTextReplacer( haystack.length() ).replace( haystack, needles );
+  }
+}

A src/main/java/com/keenwrite/processors/text/TextReplacer.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.text;
 import java.util.Map;
 /**
  * Defines the ability to replace text given a set of keys and values.
  */
 public interface TextReplacer {
   /**
    * Searches through the given text for any of the keys given in the map and
    * replaces the keys that appear in the text with the key's corresponding
    * value.
+   *
    * @param text The text that contains zero or more keys.
    * @param map  The set of keys mapped to replacement values.
    * @return The given text with all keys replaced with corresponding values.
    */
   String replace( String text, Map<String, String> map );
+}

A src/main/java/com/keenwrite/search/SearchModel.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.search;
 import com.keenwrite.util.CyclicIterator;
 import javafx.beans.property.ObjectProperty;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.beans.value.ObservableValue;
 import javafx.scene.control.IndexRange;
 import org.ahocorasick.trie.Emit;
 import org.ahocorasick.trie.Trie;
 import java.util.ArrayList;
 import java.util.List;
 import static org.ahocorasick.trie.Trie.builder;
 /**
  * Responsible for finding words in a text document. This implementation uses
  * a {@link Trie} for efficiency.
  */
 public final class SearchModel {
   private final ObjectProperty<IndexRange> mMatchOffset =
       new SimpleObjectProperty<>();
   private final ObjectProperty<Integer> mMatchCount =
       new SimpleObjectProperty<>();
   private final ObjectProperty<Integer> mMatchIndex =
       new SimpleObjectProperty<>();
   private CyclicIterator<Emit> mMatches = new CyclicIterator<>( List.of() );
   private String mNeedle = "";
   /**
    * Creates a new {@link SearchModel} that finds all text string in a
    * document simultaneously.
    */
   public SearchModel() {
+  }
   public ObjectProperty<Integer> matchCountProperty() {
     return mMatchCount;
+  }
   public ObjectProperty<Integer> matchIndexProperty() {
     return mMatchIndex;
+  }
   /**
    * Observers watch this property to be notified when a needle has been
    * found in the haystack. Use {@link IndexRange#getStart()} to get the
    * absolute offset into the text (zero-based).
+   *
    * @return The {@link IndexRange} property to observe, representing the
    * most recently matched text offset into the document.
    */
   public ObservableValue<IndexRange> matchOffsetProperty() {
     return mMatchOffset;
+  }
   /**
    * Searches the document for text matching the given parameter value. This
    * is the main entry point for kicking off text searches.
+   *
    * @param needle   The text string to find in the document, no regex allowed.
    * @param haystack The document to search within for a text string.
    */
   public void search( final String needle, final String haystack ) {
     assert needle != null;
     assert haystack != null;
     final var trie = builder()
         .ignoreCase()
         .ignoreOverlaps()
         .addKeyword( needle )
         .build();
     final var emits = trie.parseText( haystack );
     mMatches = new CyclicIterator<>( new ArrayList<>( emits ) );
     mMatchCount.set( emits.size() );
     mNeedle = needle;
     advance();
+  }
   /**
    * Searches the document for the last known needle.
+   *
    * @param haystack The new text to search.
    */
   public void search( final String haystack ) {
     search( mNeedle, haystack );
+  }
   /**
    * Moves the search iterator to the next match, wrapping as needed.
    */
   public void advance() {
     if( mMatches.hasNext() ) {
       setCurrent( mMatches.next() );
+    }
+  }
   /**
    * Moves the search iterator to the previous match, wrapping as needed.
    */
   public void retreat() {
     if( mMatches.hasPrevious() ) {
       setCurrent( mMatches.previous() );
+    }
+  }
   private void setCurrent( final Emit emit ) {
     mMatchOffset.set( new IndexRange( emit.getStart(), emit.getEnd() ) );
     mMatchIndex.set( mMatches.getIndex() + 1 );
+  }
+}

A src/main/java/com/keenwrite/security/PermissiveCertificate.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.security;
 import javax.net.ssl.*;
 import java.security.SecureRandom;
 import java.security.cert.X509Certificate;
 import static javax.net.ssl.HttpsURLConnection.setDefaultHostnameVerifier;
 import static javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory;
 /**
  * Responsible for trusting all certificate chains. The purpose of this class
  * is to work-around certificate issues caused by software that blocks
  * HTTP requests. For example, Zscaler may block HTTP requests to kroki.io
  * when generating diagrams.
  */
 public final class PermissiveCertificate {
   /**
    * Create a trust manager that does not validate certificate chains.
    */
   private static final TrustManager[] TRUST_ALL_CERTS = new TrustManager[]{
     new X509TrustManager() {
       @Override
       public X509Certificate[] getAcceptedIssuers() {
         return new X509Certificate[ 0 ];
+      }
       @Override
       public void checkClientTrusted(
         X509Certificate[] certs, String authType ) {
+      }
       @Override
       public void checkServerTrusted(
         X509Certificate[] certs, String authType ) {
+      }
+    }
   };
   /**
    * Responsible for permitting all hostnames for making HTTP requests.
    */
   private static class PermissiveHostNameVerifier implements HostnameVerifier {
     @Override
     public boolean verify( final String hostname, final SSLSession session ) {
       return true;
+    }
+  }
   /**
    * Install the all-trusting trust manager. If this fails it means that in
    * certain situations the HTML preview may fail to render diagrams. A way
    * to work around the issue is to install a local server for generating
    * diagrams.
    */
   public static boolean installTrustManager() {
     try {
       final var context = SSLContext.getInstance( "SSL" );
       context.init( null, TRUST_ALL_CERTS, new SecureRandom() );
       setDefaultSSLSocketFactory( context.getSocketFactory() );
       setDefaultHostnameVerifier( new PermissiveHostNameVerifier() );
       return true;
     } catch( final Exception ex ) {
       return false;
+    }
+  }
   /**
    * Use {@link #installTrustManager()}.
    */
   private PermissiveCertificate() {
+  }
+}

A src/main/java/com/keenwrite/service/Service.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.service;
 /**
  * All services inherit from this one.
  */
 public interface Service {
+}

A src/main/java/com/keenwrite/service/Settings.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.service;
 import java.util.Iterator;
 import java.util.List;
 /**
  * Defines how settings and options can be retrieved.
  */
 public interface Settings extends Service {
   /**
    * Returns a setting property or its default value.
+   *
    * @param property     The property key name to obtain its value.
    * @param defaultValue The default value to return iff the property cannot be
    *                     found.
    * @return The property value for the given property key.
    */
   String getSetting( String property, String defaultValue );
   /**
    * Returns a setting property or its default value.
+   *
    * @param property     The property key name to obtain its value.
    * @param defaultValue The default value to return iff the property cannot be
    *                     found.
    * @return The property value for the given property key.
    */
   int getSetting( String property, int defaultValue );
   /**
    * Returns a list of property names that begin with the given prefix. The
    * prefix is included in any matching results. This will return keys that
    * either match the prefix or start with the prefix followed by a dot ('.').
    * For example, a prefix value of <code>the.property.name</code> will likely
    * return the expected results, but <code>the.property.name.</code> (note the
    * extraneous period) will probably not.
+   *
    * @param prefix The prefix to compare against each property name.
    * @return The list of property names that have the given prefix.
    */
   Iterator<String> getKeys( final String prefix );
   /**
    * Convert the generic list of property objects into strings.
+   *
    * @param property The property value to coerce.
    * @param defaults The defaults values to use should the property be unset.
    * @return The list of properties coerced from objects to strings.
    */
   List<String> getStringSettingList( String property, List<String> defaults );
   /**
    * Converts the generic list of property objects into strings.
+   *
    * @param property The property value to coerce.
    * @return The list of properties coerced from objects to strings.
    */
   List<String> getStringSettingList( String property );
+}

A src/main/java/com/keenwrite/service/events/Notification.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.service.events;
 /**
  * Represents a message that contains a title and content.
  */
 public interface Notification {
   /**
    * Alert title.
+   *
    * @return A non-null string to use as alert message title.
    */
   String getTitle();
   /**
    * Alert message content.
+   *
    * @return A non-null string that contains information for the user.
    */
   String getContent();
+}

A src/main/java/com/keenwrite/service/events/Notifier.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.service.events;
 import javafx.scene.control.Alert;
 import javafx.stage.Window;
 import java.nio.file.Path;
 /**
  * Provides the application with a uniform way to notify the user of events.
  */
 public interface Notifier {
   /**
    * Constructs an alert message text for a modal alert dialog.
+   *
    * @param parent     The window responsible for the child dialog.
    * @param path       The path to a file that was not actionable.
    * @param titleKey   The dialog box message title.
    * @param messageKey The dialog box message content (needs formatting).
    * @param ex         The problem that requires user attention.
    */
   void alert(
     Window parent,
     Path path,
     String titleKey,
     String messageKey,
     Exception ex );
   /**
    * Constructs an alert message text for a modal alert dialog.
+   *
    * @param parent The window responsible for the child dialog.
    * @param path   The path to a file that was not actionable.
    * @param key    Prefix for both title and message key.
    * @param ex     The problem that requires user attention.
    */
   default void alert(
     Window parent,
     Path path,
     String key,
     Exception ex ) {
     alert( parent, path, key + ".title", key + ".message", ex );
+  }
   /**
    * Contains all the information that the user needs to know about a problem.
+   *
    * @param title   The dialog box message title (i.e., the error context).
    * @param message The message content (formatted with the given args).
    * @param args    The arguments to the message content that must be formatted.
    * @return The message suitable for building a modal alert dialog.
    */
   Notification createNotification(
     String title,
     String message,
     Object... args );
   /**
    * Creates an alert of alert type error with a message showing the cause of
    * the error.
+   *
    * @param parent  Dialog box owner (for modal purposes).
    * @param message The error message, title, and possibly more details.
    * @return A modal alert dialog box ready to display using showAndWait.
    */
   Alert createError( Window parent, Notification message );
   /**
    * Creates an alert of alert type confirmation with Yes/No/Cancel buttons.
+   *
    * @param parent  Dialog box owner (for modal purposes).
    * @param message The message, title, and possibly more details.
    * @return A modal alert dialog box ready to display using showAndWait.
    */
   Alert createConfirmation( Window parent, Notification message );
+}

A src/main/java/com/keenwrite/service/events/impl/ButtonOrderPane.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.service.events.impl;
 import javafx.scene.Node;
 import javafx.scene.control.ButtonBar;
 import javafx.scene.control.DialogPane;
 import static com.keenwrite.constants.Constants.sSettings;
 import static javafx.scene.control.ButtonBar.BUTTON_ORDER_WINDOWS;
 /**
  * Ensures a consistent button order for alert dialogs across platforms (because
  * the default button order on Linux defies all logic).
  */
 public class ButtonOrderPane extends DialogPane {
   public ButtonOrderPane() {
+  }
   @Override
   protected Node createButtonBar() {
     final var node = (ButtonBar) super.createButtonBar();
     node.setButtonOrder( getButtonOrder() );
     return node;
+  }
   private String getButtonOrder() {
     return sSettings.getSetting(
       "dialog.alert.button.order.windows", BUTTON_ORDER_WINDOWS );
+  }
+}

A src/main/java/com/keenwrite/service/events/impl/DefaultNotification.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.service.events.impl;
 import com.keenwrite.service.events.Notification;
 import java.text.MessageFormat;
 /**
  * Responsible for alerting the user to prominent information.
  */
 public class DefaultNotification implements Notification {
   private final String title;
   private final String content;
   /**
    * Constructs default message text for a notification.
+   *
    * @param title   The message title.
    * @param message The message content (needs formatting).
    * @param args    The arguments to the message content that must be formatted.
    */
   public DefaultNotification(
       final String title,
       final String message,
       final Object... args ) {
     this.title = title;
     this.content = MessageFormat.format( message, args );
+  }
   @Override
   public String getTitle() {
     return this.title;
+  }
   @Override
   public String getContent() {
     return this.content;
+  }
+}

A src/main/java/com/keenwrite/service/events/impl/DefaultNotifier.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.service.events.impl;
 import com.keenwrite.service.events.Notification;
 import com.keenwrite.service.events.Notifier;
 import javafx.scene.control.Alert;
 import javafx.scene.control.Alert.AlertType;
 import javafx.stage.Window;
 import java.nio.file.Path;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG_NODE;
 import static com.keenwrite.Messages.get;
 import static javafx.scene.control.Alert.AlertType.CONFIRMATION;
 import static javafx.scene.control.Alert.AlertType.ERROR;
 import static javafx.scene.control.ButtonType.*;
 /**
  * Provides the ability to notify the user of events that need attention,
  * such as prompting the user to confirm closing when there are unsaved changes.
  */
 public final class DefaultNotifier implements Notifier {
   @Override
   public Notification createNotification(
       final String title,
       final String message,
       final Object... args ) {
     return new DefaultNotification( title, message, args );
+  }
   @Override
   public void alert(
       final Window parent,
       final Path path,
       final String titleKey,
       final String messageKey,
       final Exception ex ) {
     final var message = createNotification(
         get( titleKey ), get( messageKey ), path, ex.getMessage()
     );
     createError( parent, message ).showAndWait();
+  }
   @Override
   public Alert createConfirmation(
       final Window parent, final Notification message ) {
     final var alert = createAlertDialog( parent, CONFIRMATION, message );
     alert.getButtonTypes().setAll( YES, NO, CANCEL );
     return alert;
+  }
   @Override
   public Alert createError( final Window parent, final Notification message ) {
     return createAlertDialog( parent, ERROR, message );
+  }
   private Alert createAlertDialog(
       final Window parent,
       final AlertType alertType,
       final Notification message ) {
     final var alert = new Alert( alertType );
     alert.setDialogPane( new ButtonOrderPane() );
     alert.setTitle( message.getTitle() );
     alert.setHeaderText( null );
     alert.setContentText( message.getContent() );
     alert.initOwner( parent );
     alert.setGraphic( ICON_DIALOG_NODE );
     return alert;
+  }
+}

A src/main/java/com/keenwrite/service/impl/DefaultSettings.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.service.impl;
 import com.keenwrite.service.Settings;
 import org.apache.commons.configuration2.PropertiesConfiguration;
 import org.apache.commons.configuration2.convert.DefaultListDelimiterHandler;
 import org.apache.commons.configuration2.convert.ListDelimiterHandler;
 import java.io.InputStreamReader;
 import java.net.URL;
 import java.nio.charset.Charset;
 import java.util.Iterator;
 import java.util.List;
 import static com.keenwrite.constants.Constants.PATH_PROPERTIES_SETTINGS;
 /**
  * Responsible for loading settings that help avoid hard-coded assumptions.
  */
 public final class DefaultSettings implements Settings {
   private static final char VALUE_SEPARATOR = ',';
   private final PropertiesConfiguration mProperties = loadProperties();
   public DefaultSettings() {
+  }
   /**
    * Returns the value of a string property.
+   *
    * @param property     The property key.
    * @param defaultValue The value to return if no property key has been set.
    * @return The property key value, or defaultValue when no key found.
    */
   @Override
   public String getSetting( final String property, final String defaultValue ) {
     return getSettings().getString( property, defaultValue );
+  }
   /**
    * Returns the value of a string property.
+   *
    * @param property     The property key.
    * @param defaultValue The value to return if no property key has been set.
    * @return The property key value, or defaultValue when no key found.
    */
   @Override
   public int getSetting( final String property, final int defaultValue ) {
     return getSettings().getInt( property, defaultValue );
+  }
   /**
    * Convert the generic list of property objects into strings.
+   *
    * @param property The property value to coerce.
    * @param defaults The defaults values to use should the property be unset.
    * @return The list of properties coerced from objects to strings.
    */
   @Override
   public List<String> getStringSettingList(
       final String property, final List<String> defaults ) {
     return getSettings().getList( String.class, property, defaults );
+  }
   /**
    * Convert a list of property objects into strings, with no default value.
+   *
    * @param property The property value to coerce.
    * @return The list of properties coerced from objects to strings.
    */
   @Override
   public List<String> getStringSettingList( final String property ) {
     return getStringSettingList( property, null );
+  }
   /**
    * Returns a list of property names that begin with the given prefix.
+   *
    * @param prefix The prefix to compare against each property name.
    * @return The list of property names that have the given prefix.
    */
   @Override
   public Iterator<String> getKeys( final String prefix ) {
     return getSettings().getKeys( prefix );
+  }
   private PropertiesConfiguration loadProperties() {
     final var url = getPropertySource();
     final var configuration = new PropertiesConfiguration();
     if( url != null ) {
       try( final var reader = new InputStreamReader(
           url.openStream(), getDefaultEncoding() ) ) {
         configuration.setListDelimiterHandler( createListDelimiterHandler() );
         configuration.read( reader );
       } catch( final Exception ex ) {
         throw new RuntimeException( ex );
+      }
+    }
     return configuration;
+  }
   private Charset getDefaultEncoding() {
     return Charset.defaultCharset();
+  }
   private ListDelimiterHandler createListDelimiterHandler() {
     return new DefaultListDelimiterHandler( VALUE_SEPARATOR );
+  }
   private URL getPropertySource() {
     return DefaultSettings.class.getResource( PATH_PROPERTIES_SETTINGS );
+  }
   private PropertiesConfiguration getSettings() {
     return mProperties;
+  }
+}

A src/main/java/com/keenwrite/sigils/PropertyKeyOperator.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.sigils;
 /**
  * Responsible for defining sigils used within property files.
  */
 public class PropertyKeyOperator extends SigilKeyOperator {
   public static final String BEGAN = "${";
   public static final String ENDED = "}";
   /**
    * Constructs a new {@link SigilKeyOperator} subclass with <code>${</code>
    * and <code>}</code> used for the beginning and ending sigils.
    */
   public PropertyKeyOperator() {
     super( BEGAN, ENDED );
+  }
+}

A src/main/java/com/keenwrite/sigils/RKeyOperator.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.sigils;
 import com.keenwrite.collections.BoundedCache;
 import java.util.function.UnaryOperator;
 /**
  * Converts dot-separated variable names into names compatible with R. That is,
  * {@code variable.name.qualified} becomes {@code v$variable$name$qualified}.
  */
 public final class RKeyOperator implements UnaryOperator<String> {
   private static final char KEY_SEPARATOR_DEF = '.';
   private static final char KEY_SEPARATOR_R = '$';
   /** Minor optimization to avoid recreating an object. */
   private final StringBuilder mVarName = new StringBuilder( 128 );
   /** Optimization to avoid re-converting variable names into R format. */
   private final BoundedCache<String, String> mVariables = new BoundedCache<>(
   );
   /**
    * Constructs a new instance capable of converting dot-separated variable
    * names into R's dollar-symbol-separated names.
    */
   public RKeyOperator() { }
   /**
    * Transforms a definition key name into the expected format for an R
    * variable key name.
    * <p>
    * This algorithm is faster than {@link String#replace(char, char)}. Faster
    * still would be to cache the values, but that would mean managing the
    * cache when the user changes the beginning and ending of the R delimiters.
    * This code gives about a 2% performance boost when scrolling using
    * cursor keys. After the JIT warms up, this super-minor bottleneck vanishes.
+   *
    * @param key The variable name to transform, neither blank nor {@code null}.
    * @return The transformed variable name.
    */
   @Override
   public String apply( final String key ) {
     assert key != null;
     assert key.length() > 0;
     assert !key.isBlank();
     return mVariables.computeIfAbsent( key, this::convert );
+  }
   private String convert( final String key ) {
     mVarName.setLength( 0 );
     mVarName.append( "v" );
     mVarName.append( KEY_SEPARATOR_R );
     mVarName.append( key );
     // The 3 is for v$ + first char, which cannot be a separator.
     for( int i = mVarName.length() - 1; i >= 3; i-- ) {
       if( mVarName.charAt( i ) == KEY_SEPARATOR_DEF ) {
         mVarName.setCharAt( i, KEY_SEPARATOR_R );
+      }
+    }
     return mVarName.toString();
+  }
+}

A src/main/java/com/keenwrite/sigils/SigilKeyOperator.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.sigils;
 import java.util.function.UnaryOperator;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import static java.lang.String.format;
 import static java.util.regex.Pattern.compile;
 import static java.util.regex.Pattern.quote;
 /**
  * Responsible for bracketing definition keys with token delimiters.
  */
 public class SigilKeyOperator implements UnaryOperator<String> {
   private final String mBegan;
   private final String mEnded;
   private final Pattern mPattern;
   public SigilKeyOperator( final String began, final String ended ) {
     assert began != null;
     assert ended != null;
     mBegan = began;
     mEnded = ended;
     mPattern = compile( format( "%s(.*?)%s", quote( began ), quote( ended ) ) );
+  }
   @Override
   public String apply( final String key ) {
     assert key != null;
     assert !key.startsWith( mBegan );
     assert !key.endsWith( mEnded );
     return mBegan + key + mEnded;
+  }
   public Matcher match( final String text ) {
     return mPattern.matcher( text );
+  }
+}

A src/main/java/com/keenwrite/spelling/api/SpellCheckListener.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.spelling.api;
 import java.util.function.BiConsumer;
 /**
  * Represents an operation that accepts two input arguments and returns no
  * result. Unlike most other functional interfaces, this class is expected to
  * operate via side-effects.
  * <p>
  * This is used instead of a {@link BiConsumer} to avoid autoboxing.
  * </p>
  */
 @FunctionalInterface
 public interface SpellCheckListener {
   /**
    * Performs an operation on the given arguments.
+   *
    * @param text        The text associated with a beginning and ending offset.
    * @param beganOffset A starting offset, used as an index into a string.
    * @param endedOffset An ending offset, which should equal text.length() +
    *                    beganOffset.
    */
   void accept( String text, int beganOffset, int endedOffset );
+}

A src/main/java/com/keenwrite/spelling/api/SpellChecker.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.spelling.api;
 import java.util.List;
 /**
  * Defines the responsibilities for a spell checking API. The intention is
  * to allow different spell checking implementations to be used by the
  * application, such as SymSpell and LinSpell.
  */
 public interface SpellChecker {
   /**
    * Answers whether the given lexeme, in whole, is found in the lexicon. The
    * lexicon lookup is performed case-insensitively. This method should be
    * used instead of {@link #suggestions(String, int)} for performance reasons.
+   *
    * @param lexeme The word to check for correctness.
    * @return {@code true} if the lexeme is in the lexicon.
    */
   boolean inLexicon( String lexeme );
   /**
    * Gets a list of spelling corrections for the given lexeme.
+   *
    * @param lexeme A word to check for correctness that's not in the lexicon.
    * @param count  The maximum number of alternatives to return.
    * @return A list of words in the lexicon that are similar to the given
    * lexeme.
    */
   List<String> suggestions( String lexeme, int count );
   /**
    * Iterates over the given text, emitting starting and ending offsets into
    * the text for every word that is missing from the lexicon.
+   *
    * @param text     The text to check for words missing from the lexicon.
    * @param consumer Every missing word emits a message with the starting
    *                 and ending offset into the text where said word is found.
    */
   void proofread( String text, SpellCheckListener consumer );
+}

A src/main/java/com/keenwrite/spelling/api/package-info.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 /**
  * This package contains interfaces for spell checking implementations.
  */
 package com.keenwrite.spelling.api;

A src/main/java/com/keenwrite/spelling/impl/Lexicon.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.spelling.impl;
 import com.keenwrite.events.spelling.LexiconLoadedEvent;
 import com.keenwrite.exceptions.MissingFileException;
 import java.io.BufferedReader;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.HashMap;
 import java.util.Locale;
 import static com.keenwrite.constants.Constants.LEXICONS_DIRECTORY;
 import static com.keenwrite.events.StatusEvent.clue;
 import static java.lang.String.format;
 import static java.nio.charset.StandardCharsets.UTF_8;
 /**
  * Responsible for loading a set of single words, asynchronously.
  */
 public final class Lexicon {
   /**
    * Most lexicons have 100,000 words.
    */
   private static final int LEXICON_CAPACITY = 100_000;
   /**
    * The word-frequency entries are tab-delimited.
    */
   private static final char DELIMITER = '\t';
   /**
    * Load the lexicon into memory then fire an event indicating that the
    * word-frequency pairs are available to use for spellchecking. This
    * happens asynchronously so that the UI can load faster.
+   *
    * @param locale The locale having a corresponding lexicon to load.
    */
   public static void read( final Locale locale ) {
     assert locale != null;
     new Thread( read( toResourcePath( locale ) ) ).start();
+  }
   private static Runnable read( final String path ) {
     return () -> {
       try( final var resource = openResource( path ) ) {
         read( resource );
       } catch( final Exception ex ) {
         clue( ex );
+      }
     };
+  }
   private static void read( final InputStream resource ) {
     try( final var input = new InputStreamReader( resource, UTF_8 );
          final var reader = new BufferedReader( input ) ) {
       read( reader );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   private static void read( final BufferedReader reader ) {
     try {
       long count = 0;
       final var lexicon = new HashMap<String, Long>( LEXICON_CAPACITY );
       String line;
       while( (line = reader.readLine()) != null ) {
         final var index = line.indexOf( DELIMITER );
         final var word = line.substring( 0, index == -1 ? 0 : index );
         final var frequency = parse( line.substring( index + 1 ) );
         lexicon.put( word, frequency );
         // Slower machines may benefit users by showing a loading message.
         if( ++count % 25_000 == 0 ) {
           status( "loading", count );
+        }
+      }
       // Indicate that loading the lexicon is finished.
       status( "loaded", count );
       LexiconLoadedEvent.fire( lexicon );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   /**
    * Prevents autoboxing and uses cached values when possible. A return value
    * of 0L means that the word will receive the lowest priority. If there's
    * an error (i.e., data corruption) parsing the number, the spell checker
    * will still work, but be suboptimal for all erroneous entries.
+   *
    * @param number The numeric value to parse into a long object.
    * @return The parsed value, or 0L if the number couldn't be parsed.
    */
   private static Long parse( final String number ) {
     try {
       return Long.valueOf( number );
     } catch( final NumberFormatException ex ) {
       clue( ex );
       return 0L;
+    }
+  }
   private static InputStream openResource( final String path )
     throws MissingFileException {
     final var resource = Lexicon.class.getResourceAsStream( path );
     if( resource == null ) {
       throw new MissingFileException( path );
+    }
     return resource;
+  }
   /**
    * Convert a {@link Locale} into a path that can be loaded as a resource.
+   *
    * @param locale The {@link Locale} to convert to a resource.
    * @return The slash-separated path to a lexicon resource file.
    */
   private static String toResourcePath( final Locale locale ) {
     final var language = locale.getLanguage();
     return format( "/%s/%s.txt", LEXICONS_DIRECTORY, language );
+  }
   private static void status( final String s, final long count ) {
     clue( "Main.status.lexicon." + s, count );
+  }
+}

A src/main/java/com/keenwrite/spelling/impl/PermissiveSpeller.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.spelling.impl;
 import com.keenwrite.spelling.api.SpellCheckListener;
 import com.keenwrite.spelling.api.SpellChecker;
 import java.util.List;
 /**
  * Responsible for spell checking in the event that a real spell checking
  * implementation cannot be created (for any reason). Does not perform any
  * spell checking and indicates that any given lexeme is in the lexicon.
  */
 public final class PermissiveSpeller implements SpellChecker {
   /**
    * Returns {@code true}, ignoring the given word.
+   *
    * @param ignored Unused.
    * @return {@code true}
    */
   @Override
   public boolean inLexicon( final String ignored ) {
     return true;
+  }
   /**
    * Returns an array with the given lexeme.
+   *
    * @param lexeme  The word to return.
    * @param ignored Unused.
    * @return A suggestion list containing the given lexeme.
    */
   @Override
   public List<String> suggestions( final String lexeme, final int ignored ) {
     return List.of( lexeme );
+  }
   /**
    * Performs no action.
+   *
    * @param text    Unused.
    * @param ignored Uncalled.
    */
   @Override
   public void proofread(
       final String text, final SpellCheckListener ignored ) {
+  }
+}

A src/main/java/com/keenwrite/spelling/impl/SymSpellSpeller.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.spelling.impl;
 import com.keenwrite.spelling.api.SpellCheckListener;
 import com.keenwrite.spelling.api.SpellChecker;
 import io.gitlab.rxp90.jsymspell.SymSpell;
 import io.gitlab.rxp90.jsymspell.SymSpellBuilder;
 import io.gitlab.rxp90.jsymspell.Verbosity;
 import io.gitlab.rxp90.jsymspell.api.SuggestItem;
 import io.gitlab.rxp90.jsymspell.exceptions.NotInitializedException;
 import java.text.BreakIterator;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import static io.gitlab.rxp90.jsymspell.Verbosity.ALL;
 import static io.gitlab.rxp90.jsymspell.Verbosity.CLOSEST;
 import static java.lang.Character.isLetter;
 /**
  * Responsible for spell checking using {@link SymSpell}.
  */
 public class SymSpellSpeller implements SpellChecker {
   private final BreakIterator mBreakIterator = BreakIterator.getWordInstance();
   private final SymSpell mSymSpell;
   /**
    * Creates a new spellchecker for a lexicon of words in the specified file.
+   *
    * @param lexicon The word-frequency map.
    * @return An instance of {@link SpellChecker} that can check if a word
    * is correct and suggest alternatives, or {@link PermissiveSpeller} if the
    * lexicon cannot be loaded.
    */
   public static SpellChecker forLexicon( final Map<String, Long> lexicon )
     throws NotInitializedException {
     assert lexicon != null;
     assert !lexicon.isEmpty();
     final var symSpell = new SymSpellBuilder()
       .setUnigramLexicon( lexicon )
       .build();
     return new SymSpellSpeller( symSpell );
+  }
   /**
    * Prevent direct instantiation so that only the {@link SpellChecker}
    * interface is available.
+   *
    * @param symSpell The implementation-specific spell checker.
    */
   private SymSpellSpeller( final SymSpell symSpell ) {
     assert symSpell != null;
     mSymSpell = symSpell;
+  }
   /**
    * This expensive operation is only called for viable words, not for
    * single punctuation characters or whitespace.
+   *
    * @param lexeme The word to check for correctness.
    * @return {@code false} if the word is not in the lexicon.
    */
   @Override
   public boolean inLexicon( final String lexeme ) {
     assert lexeme != null;
     assert !lexeme.isEmpty();
     final var words = lookup( lexeme, CLOSEST );
     return !words.isEmpty() && lexeme.equals( words.get( 0 ).getSuggestion() );
+  }
   @Override
   public List<String> suggestions( final String lexeme, int count ) {
     assert lexeme != null;
     assert !lexeme.isEmpty();
     final List<String> result = new ArrayList<>( count );
     for( final var item : lookup( lexeme, ALL ) ) {
       if( count-- > 0 ) {
         result.add( item.getSuggestion() );
+      }
       else {
         break;
+      }
+    }
     return result;
+  }
   @Override
   public void proofread(
     final String text,
     final SpellCheckListener consumer ) {
     assert text != null;
     assert consumer != null;
     mBreakIterator.setText( text );
     int boundaryIndex = mBreakIterator.first();
     int previousIndex = 0;
     while( boundaryIndex != BreakIterator.DONE ) {
       final var lex =
         text.substring( previousIndex, boundaryIndex ).toLowerCase();
       // Get the lexeme for the possessive.
       final var pos = lex.endsWith( "'s" ) || lex.endsWith( "’s" );
       final var lexeme = pos ? lex.substring( 0, lex.length() - 2 ) : lex;
       if( isWord( lexeme ) && !inLexicon( lexeme ) ) {
         consumer.accept( lex, previousIndex, boundaryIndex );
+      }
       previousIndex = boundaryIndex;
       boundaryIndex = mBreakIterator.next();
+    }
+  }
   /**
    * Answers whether the given string is likely a word by checking the first
    * character.
+   *
    * @param word The word to check.
    * @return {@code true} if the word begins with a letter.
    */
   private boolean isWord( final String word ) {
     assert word != null;
     return !word.isBlank() && isLetter( word.charAt( 0 ) );
+  }
   /**
    * Returns a list of {@link SuggestItem} instances that provide alternative
    * spellings for the given lexeme.
+   *
    * @param lexeme A word to look up in the lexicon.
    * @param v      Influences the number of results returned.
    * @return Alternative lexemes.
    */
   private List<SuggestItem> lookup( final String lexeme, final Verbosity v ) {
     assert lexeme != null;
     assert v != null;
     return mSymSpell.lookup( lexeme, v );
+  }
+}

A src/main/java/com/keenwrite/spelling/impl/package-info.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 /**
  * This package contains classes for spell checking implementations.
  */
 package com.keenwrite.spelling.impl;

A src/main/java/com/keenwrite/typesetting/GuestTypesetter.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting;
 import com.keenwrite.io.CommandNotFoundException;
 import com.keenwrite.io.StreamGobbler;
 import com.keenwrite.typesetting.containerization.Podman;
 import org.apache.commons.io.FilenameUtils;
 import java.nio.file.Path;
 import java.util.LinkedList;
 import java.util.concurrent.Callable;
 import static com.keenwrite.constants.Constants.USER_DIRECTORY;
 import static com.keenwrite.io.StreamGobbler.gobble;
 import static com.keenwrite.typesetting.containerization.Podman.MANAGER;
 import static java.lang.String.format;
 /**
  * Responsible for invoking a typesetter installed inside a container.
  */
 public final class GuestTypesetter extends Typesetter
   implements Callable<Boolean> {
   private static final String SOURCE = "/root/source";
   private static final String TARGET = "/root/target";
   private static final String THEMES = "/root/themes";
   private static final String IMAGES = "/root/images";
   private static final String CACHES = "/root/caches";
   private static final String FONTS = "/root/fonts";
   private static final boolean READONLY = true;
   private static final boolean READWRITE = false;
   private static final String TYPESETTER_VERSION =
     TYPESETTER_EXE + " --version > /dev/null";
   public GuestTypesetter( final Mutator mutator ) {
     super( mutator );
+  }
   @Override
   public Boolean call() throws Exception {
     final var sourcePath = getSourcePath();
     final var targetPath = getTargetPath();
     final var themesPath = getThemesPath();
     final var sourceDir = normalize( sourcePath.getParent() );
     final var targetDir = normalize( targetPath.getParent() );
     final var themesDir = normalize( themesPath.getParent() );
     final var imagesDir = normalize( getImagesPath() );
     final var cachesDir = normalize( getCachesPath() );
     final var fontsDir = normalize( getFontsPath() );
     final var sourceFile = sourcePath.getFileName();
     final var targetFile = targetPath.getFileName();
     final var themesFile = themesPath.getFileName();
     final var manager = new Podman();
     manager.mount( sourceDir, SOURCE, READONLY );
     manager.mount( targetDir, TARGET, READWRITE );
     manager.mount( themesDir, THEMES, READONLY );
     manager.mount( imagesDir, IMAGES, READONLY );
     manager.mount( cachesDir, CACHES, READWRITE );
     manager.mount( fontsDir, FONTS, READONLY );
     final var args = new LinkedList<String>();
     args.add( TYPESETTER_EXE );
     args.addAll( commonOptions() );
     args.add( format(
       "--arguments=themesdir=%s/%s,imagesdir=%s,cachesdir=%s",
       THEMES, themesFile, IMAGES, CACHES
     ) );
     args.add( format( "--path='%s/%s'", THEMES, themesFile ) );
     args.add( format( "--result='%s'", removeExtension( targetFile ) ) );
     args.add( format( "%s/%s", SOURCE, sourceFile ) );
     final var listener = new PaginationListener();
     final var command = String.join( " ", args );
     manager.run( in -> StreamGobbler.gobble( in, listener ), command );
     return true;
+  }
   /**
    * If the path doesn't exist right before typesetting, switch the path
    * to the user's home directory to increase the odds of the typesetter
    * succeeding. This could help, for example, if the images directory was
    * deleted or moved.
+   *
    * @param path The path to verify existence.
    * @return The given path, if it exists, otherwise the user's home directory.
    */
   private static Path normalize( final Path path ) {
     assert path != null;
     return path.toFile().exists()
       ? path
       : USER_DIRECTORY.toPath();
+  }
   static String removeExtension( final Path path ) {
     return FilenameUtils.removeExtension( path.toString() );
+  }
   /**
    * @return {@code true} indicates that the containerized typesetter is
    * installed, properly configured, and ready to typeset documents.
    */
   static boolean isReady() {
     if( MANAGER.canRun() ) {
       final var exitCode = new StringBuilder();
       final var manager = new Podman();
       try {
         // Running blocks until the command completes.
         manager.run(
           input -> gobble( input, s -> exitCode.append( s.trim() ) ),
           TYPESETTER_VERSION + "; echo $?"
         );
         // If the typesetter ran with an exit code of 0, it is available.
         return exitCode.indexOf( "0" ) == 0;
       } catch( final CommandNotFoundException ignored ) { }
+    }
     return false;
+  }
+}

A src/main/java/com/keenwrite/typesetting/HostTypesetter.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting;
 import com.keenwrite.collections.CircularQueue;
 import com.keenwrite.io.StreamGobbler;
 import com.keenwrite.io.SysFile;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.Callable;
 import static com.keenwrite.constants.Constants.DEFAULT_DIRECTORY;
 import static com.keenwrite.events.StatusEvent.clue;
 import static java.lang.ProcessBuilder.Redirect.DISCARD;
 import static java.lang.System.getProperty;
 import static java.nio.file.Files.*;
 import static java.util.Arrays.asList;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.apache.commons.io.FilenameUtils.removeExtension;
 /**
  * Responsible for invoking an executable to typeset text. This will
  * construct suitable command-line arguments to invoke the typesetting engine.
  * This uses a version of the typesetter installed on the host system.
  */
 public final class HostTypesetter extends Typesetter
   implements Callable<Boolean> {
   private static final SysFile TYPESETTER = new SysFile( TYPESETTER_EXE );
   HostTypesetter( final Mutator mutator ) {
     super( mutator );
+  }
   /**
    * Answers whether the typesetting software is installed locally.
+   *
    * @return {@code true} if the typesetting software is installed on the host.
    */
   public static boolean isReady() {
     return TYPESETTER.canRun();
+  }
   /**
    * Launches a task to typeset a document.
    */
   private class TypesetTask implements Callable<Boolean> {
     private final List<String> mArgs = new ArrayList<>();
     /**
      * Working directory must be set because ConTeXt cannot write the
      * result to an arbitrary location.
      */
     private final Path mDirectory;
     private TypesetTask() {
       final var parentDir = getTargetPath().getParent();
       mDirectory = parentDir == null ? DEFAULT_DIRECTORY : parentDir;
+    }
     /**
      * Initializes ConTeXt, which means creating the cache directory if it
      * doesn't already exist. The theme entry point must be named 'main.tex'.
+     *
      * @return {@code true} if the cache directory exists.
      */
     private boolean reinitialize() {
       final var cacheExists = !isEmpty( getCacheDir().toPath() );
       // Ensure invoking multiple times will load the correct arguments.
       mArgs.clear();
       mArgs.add( TYPESETTER_EXE );
       if( cacheExists ) {
         mArgs.addAll( options() );
         final var sb = new StringBuilder( 128 );
         mArgs.forEach( arg -> sb.append( arg ).append( " " ) );
         clue( sb.toString() );
+      }
       else {
         mArgs.add( "--generate" );
+      }
       return cacheExists;
+    }
     /**
      * Setting {@code TEXMFCACHE} when run on a fresh system fails on the first
      * try. If the cache directory doesn't exist, attempt to create it, then
      * call ConTeXt to generate the PDF. This is brittle because if the
      * directory is empty, or not populated with cached data, a false positive
      * will be returned, resulting in no PDF being created.
+     *
      * @return {@code true} if the document was typeset successfully.
      * @throws IOException          If the process could not be started.
      * @throws InterruptedException If the process was killed.
      */
     private boolean typeset() throws IOException, InterruptedException {
       return reinitialize() ? call() : call() && reinitialize() && call();
+    }
     @Override
     public Boolean call() throws IOException, InterruptedException {
       final var stdout = new CircularQueue<String>( 150 );
       final var builder = new ProcessBuilder( mArgs );
       builder.directory( mDirectory.toFile() );
       builder.environment().put( "TEXMFCACHE", getCacheDir().toString() );
       // Without redirecting (or draining) stderr, the command may not
       // terminate successfully.
       builder.redirectError( DISCARD );
       final var process = builder.start();
       final var listener = new PaginationListener();
       // Slurp page numbers in a separate thread while typesetting.
       StreamGobbler.gobble( process.getInputStream(), line -> {
         listener.accept( line );
         stdout.add( line );
       } );
       // Even though the process has completed, there may be incomplete I/O.
       process.waitFor();
       // Allow time for any incomplete I/O to take place.
       process.waitFor( 1, SECONDS );
       final var exit = process.exitValue();
       process.destroy();
       // If there was an error, the typesetter will leave behind log, pdf, and
       // error files.
       if( exit > 0 ) {
         final var xmlName = getSourcePath().getFileName().toString();
         final var srcName = getTargetPath().getFileName().toString();
         final var logName = newExtension( xmlName, ".log" );
         final var errName = newExtension( xmlName, "-error.log" );
         final var pdfName = newExtension( xmlName, ".pdf" );
         final var tuaName = newExtension( xmlName, ".tua" );
         final var badName = newExtension( srcName, ".log" );
         log( badName );
         log( logName );
         log( errName );
         log( stdout.stream().toList() );
         // Users may opt to keep these files around for debugging purposes.
         if( autoRemove() ) {
           deleteIfExists( logName );
           deleteIfExists( errName );
           deleteIfExists( pdfName );
           deleteIfExists( badName );
           deleteIfExists( tuaName );
+        }
+      }
       // Exit value for a successful invocation of the typesetter. This value
       // is returned when creating the cache on the first run as well as
       // creating PDFs on subsequent runs (after the cache has been created).
       // Users don't care about exit codes, only whether the PDF was generated.
       return exit == 0;
+    }
     private Path newExtension( final String baseName, final String ext ) {
       final var path = getTargetPath();
       return path.resolveSibling( removeExtension( baseName ) + ext );
+    }
     /**
      * Fires a status message for each line in the given file. The file format
      * is somewhat machine-readable, but no effort beyond line splitting is
      * made to parse the text.
+     *
      * @param path Path to the file containing error messages.
      */
     private void log( final Path path ) throws IOException {
       if( exists( path ) ) {
         log( readAllLines( path ) );
+      }
+    }
     private void log( final List<String> lines ) {
       final var splits = new ArrayList<String>( lines.size() * 2 );
       for( final var line : lines ) {
         splits.addAll( asList( line.split( "\\\\n" ) ) );
+      }
       clue( splits );
+    }
     /**
      * Returns the location of the cache directory.
+     *
      * @return A fully qualified path to the location to store temporary
      * files between typesetting runs.
      */
     @SuppressWarnings( "SpellCheckingInspection" )
     private java.io.File getCacheDir() {
       final var temp = getProperty( "java.io.tmpdir" );
       final var cache = Path.of( temp, "luatex-cache" );
       return cache.toFile();
+    }
     /**
      * Answers whether the given directory is empty. The typesetting software
      * creates a non-empty directory by default. The return value from this
      * method is a proxy to answering whether the typesetter has been run for
      * the first time or not.
+     *
      * @param path The directory to check for emptiness.
      * @return {@code true} if the directory is empty.
      */
     private boolean isEmpty( final Path path ) {
       try( final var stream = newDirectoryStream( path ) ) {
         return !stream.iterator().hasNext();
       } catch( final NoSuchFileException | FileNotFoundException ex ) {
         // A missing directory means it doesn't exist, ergo is empty.
         return true;
       } catch( final IOException ex ) {
         throw new RuntimeException( ex );
+      }
+    }
+  }
   /**
    * This will typeset the document using a new process. The return value only
    * indicates whether the typesetter exists, not whether the typesetting was
    * successful. The typesetter must be known to exist prior to calling this
    * method.
+   *
    * @throws IOException                 If the process could not be started.
    * @throws InterruptedException        If the process was killed.
    * @throws TypesetterNotFoundException When no typesetter is along the PATH.
    */
   @Override
   public Boolean call()
     throws IOException, InterruptedException, TypesetterNotFoundException {
     final var task = new HostTypesetter.TypesetTask();
     return task.typeset();
+  }
+}

A src/main/java/com/keenwrite/typesetting/PaginationListener.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting;
 import java.util.Scanner;
 import java.util.function.Consumer;
 import java.util.regex.Pattern;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Responsible for parsing the output from the typesetting engine and
  * updating the status bar to provide assurance that typesetting is
  * executing.
+ *
  * <p>
  * Example lines written to standard output:
  * </p>
  * <pre>{@code
  * pages           > flushing realpage 15, userpage 15, subpage 15
  * pages           > flushing realpage 16, userpage 16, subpage 16
  * pages           > flushing realpage 1, userpage 1, subpage 1
  * pages           > flushing realpage 2, userpage 2, subpage 2
  * }</pre>
  * <p>
  * The lines are parsed; the first number is displayed as a status bar
  * message.
  * </p>
  */
 class PaginationListener implements Consumer<String> {
   private static final Pattern DIGITS = Pattern.compile( "\\D+" );
   private int mPageCount = 1;
   private int mPassCount = 1;
   private int mPageTotal = 0;
   public PaginationListener() { }
   @Override
   public void accept( final String line ) {
     if( line.startsWith( "pages" ) ) {
       final var scanner = new Scanner( line ).useDelimiter( DIGITS );
       final var digits = scanner.next();
       final var page = Integer.parseInt( digits );
       // If the page number is less than the previous page count, it
       // means that the typesetting engine has started another pass.
       if( page < mPageCount ) {
         mPassCount++;
         mPageTotal = mPageCount;
+      }
       mPageCount = page;
       // Inform the user of pages being typeset.
       clue( "Main.status.typeset.page",
             mPageCount, mPageTotal < 1 ? "?" : mPageTotal, mPassCount
       );
+    }
+  }
+}

A src/main/java/com/keenwrite/typesetting/Typesetter.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting;
 import com.keenwrite.util.GenericBuilder;
 import com.keenwrite.util.Time;
 import java.nio.file.Path;
 import java.time.Duration;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.Callable;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.util.Time.toElapsedTime;
 import static java.lang.String.format;
 import static java.lang.System.currentTimeMillis;
 import static java.time.Duration.ofMillis;
 /**
  * Responsible for typesetting a document using either a typesetter installed
  * on the computer ({@link HostTypesetter} or installed within a container
  * ({@link GuestTypesetter}).
  */
 public class Typesetter {
   /**
    * Name of the executable program that can typeset documents.
    */
   static final String TYPESETTER_EXE = "mtxrun";
   public static GenericBuilder<Mutator, Typesetter> builder() {
     return GenericBuilder.of( Mutator::new, Typesetter::new );
+  }
   public static final class Mutator {
     private Path mSourcePath;
     private Path mTargetPath;
     private Path mThemesPath;
     private Path mImagesPath;
     private Path mCachesPath;
     private Path mFontsPath;
     private boolean mAutoRemove;
     /**
      * @param inputPath The input document to typeset.
      */
     public void setSourcePath( final Path inputPath ) {
       mSourcePath = inputPath;
+    }
     /**
      * @param outputPath Path to the finished typeset document to create.
      */
     public void setTargetPath( final Path outputPath ) {
       mTargetPath = outputPath;
+    }
     /**
      * @param themePath Fully qualified path to the theme directory, which
      *                  ends with the selected theme name.
      */
     public void setThemesPath( final Path themePath ) {
       mThemesPath = themePath;
+    }
     /**
      * @param imagePath Fully qualified path to the "images" directory.
      */
     public void setImagesPath( final Path imagePath ) {
       mImagesPath = imagePath;
+    }
     /**
      * @param cachePath Fully qualified path to the "caches" directory.
      */
     public void setCachesPath( final Path cachePath ) {
       mCachesPath = cachePath;
+    }
     /**
      * @param fontsPath Fully qualified path to the "fonts" directory.
      */
     public void setFontsPath( final Path fontsPath ) {
       mFontsPath = fontsPath;
+    }
     /**
      * @param remove {@code true} to remove all temporary files after the
      *               typesetter produces a PDF file.
      */
     public void setAutoRemove( final boolean remove ) {
       mAutoRemove = remove;
+    }
     public Path getSourcePath() {
       return mSourcePath;
+    }
     public Path getTargetPath() {
       return mTargetPath;
+    }
     public Path getThemesPath() {
       return mThemesPath;
+    }
     public Path getImagesPath() {
       return mImagesPath;
+    }
     public Path getCachesPath() {
       return mCachesPath;
+    }
     public Path getFontsPath() {
       return mFontsPath;
+    }
     public boolean isAutoRemove() {
       return mAutoRemove;
+    }
+  }
   private final Mutator mMutator;
   /**
    * Creates a new {@link Typesetter} instance capable of configuring the
    * typesetter used to generate a typeset document.
    */
   Typesetter( final Mutator mutator ) {
     assert mutator != null;
     mMutator = mutator;
+  }
   public void typeset() throws Exception {
     final Callable<Boolean> typesetter;
     if( HostTypesetter.isReady() ) {
       typesetter = new HostTypesetter( mMutator );
+    }
     else if( GuestTypesetter.isReady() ) {
       typesetter = new GuestTypesetter( mMutator );
+    }
     else {
       throw new TypesetterNotFoundException( TYPESETTER_EXE );
+    }
     final var outputPath = getTargetPath();
     final var prefix = "Main.status.typeset";
     clue( prefix + ".began", outputPath );
     final var time = currentTimeMillis();
     final var success = typesetter.call();
     final var suffix = success ? ".success" : ".failure";
     clue( prefix + ".ended" + suffix, outputPath, since( time ) );
+  }
   /**
    * Generates the command-line arguments used to invoke the typesetter.
    */
   @SuppressWarnings( "SpellCheckingInspection" )
   List<String> options() {
     final var args = commonOptions();
     final var sourcePath = getSourcePath().toString();
     final var targetPath = getTargetPath().getFileName();
     final var themesPath = getThemesPath();
     final var imagesPath = getImagesPath();
     final var cachesPath = getCachesPath();
     args.add(
       format( "--arguments=themesdir=%s,imagesdir=%s,cachesdir=%s",
               themesPath, imagesPath, cachesPath  )
     );
     args.add( format( "--path='%s'", themesPath ) );
     args.add( format( "--result='%s'", targetPath ) );
     args.add( sourcePath );
     return args;
+  }
   @SuppressWarnings( "SpellCheckingInspection" )
   List<String> commonOptions() {
     final var args = new LinkedList<String>();
     args.add( "--autogenerate" );
     args.add( "--script" );
     args.add( "mtx-context" );
     args.add( "--batchmode" );
     args.add( "--nonstopmode" );
     args.add( "--purgeall" );
     args.add( "--environment='main'" );
     return args;
+  }
   protected Path getSourcePath() {
     return mMutator.getSourcePath();
+  }
   protected Path getTargetPath() {
     return mMutator.getTargetPath();
+  }
   protected Path getThemesPath() {
     return mMutator.getThemesPath();
+  }
   protected Path getImagesPath() {
     return mMutator.getImagesPath();
+  }
   protected Path getCachesPath() {
     return mMutator.getCachesPath();
+  }
   protected Path getFontsPath() {
     return mMutator.getFontsPath();
+  }
   /**
    * Answers whether logs and other files should be deleted upon error. The
    * log files are useful for debugging.
+   *
    * @return {@code true} to delete generated files.
    */
   public boolean autoRemove() {
     return mMutator.isAutoRemove();
+  }
   public static boolean canRun() {
     return hostCanRun() || guestCanRun();
+  }
   private static boolean hostCanRun() {
     return HostTypesetter.isReady();
+  }
   private static boolean guestCanRun() {
     return GuestTypesetter.isReady();
+  }
   /**
    * Calculates the time that has elapsed from the current time to the
    * given moment in time.
+   *
    * @param start The starting time, which should be before the current time.
    * @return A human-readable formatted time.
    * @see Time#toElapsedTime(Duration)
    */
   private static String since( final long start ) {
     return toElapsedTime( ofMillis( currentTimeMillis() - start ) );
+  }
+}

A src/main/java/com/keenwrite/typesetting/TypesetterNotFoundException.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting;
 /**
  * Responsible for creating an alternate execution path when a typesetter
  * cannot be found.
  */
 public class TypesetterNotFoundException extends RuntimeException {
   /**
    * Constructs a new exception that indicates the typesetting engine cannot
    * be found anywhere along the PATH.
+   *
    * @param name Typesetter executable file name.
    */
   public TypesetterNotFoundException( final String name ) {
     super( name );
+  }
+}

A src/main/java/com/keenwrite/typesetting/containerization/ContainerManager.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.containerization;
 import com.keenwrite.io.CommandNotFoundException;
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
 public interface ContainerManager {
   /**
    * Installs the container software, in quiet and headless mode if possible.
+   *
    * @param exe The installer binary to run.
    * @return The exit code from the installer program, or -1 on failure.
    * @throws IOException The container installer could not be run.
    */
   int install( final File exe )
     throws IOException;
   /**
    * Runs preliminary commands against the container before starting.
+   *
    * @param processor Processes the command output (in a separate thread).
    * @throws CommandNotFoundException The container executable was not found.
    */
   void start( StreamProcessor processor ) throws CommandNotFoundException;
   /**
    * Requests that the container manager load an image into the container.
+   *
    * @param name The full container name of the image to pull.
    * @param processor Processes the command output (in a separate thread).
    * @throws CommandNotFoundException The container executable was not found.
    */
   void pull( StreamProcessor processor, String name )
     throws CommandNotFoundException;
   /**
    * Runs a command using the container manager.
+   *
    * @param processor Processes the command output (in a separate thread).
    * @param args      The command and arguments to run.
    * @return The exit code returned by the installer program.
    * @throws CommandNotFoundException The container executable was not found.
    */
   int run( StreamProcessor processor, String... args )
     throws CommandNotFoundException;
   /**
    * Convenience method to run a command using the container manager.
+   *
    * @see #run(StreamProcessor, String...)
    */
   default int run( final StreamProcessor listener, final List<String> args )
     throws CommandNotFoundException {
     return run( listener, toArray( args ) );
+  }
   /**
    * Convenience method to convert a {@link List} into an array.
+   *
    * @param list The elements to convert to an array.
    * @return The converted {@link List}.
    */
   default String[] toArray( final List<String> list ) {
     return list.toArray( new String[ 0 ] );
+  }
+}

A src/main/java/com/keenwrite/typesetting/containerization/Podman.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.containerization;
 import com.keenwrite.io.CommandNotFoundException;
 import com.keenwrite.io.SysFile;
 import java.io.File;
 import java.nio.file.Path;
 import java.util.LinkedList;
 import java.util.List;
 import static com.keenwrite.Bootstrap.CONTAINER_VERSION;
 import static java.lang.String.format;
 import static java.lang.System.arraycopy;
 import static java.util.Arrays.copyOf;
 /**
  * Provides facilities for interacting with a container environment.
  */
 public final class Podman implements ContainerManager {
   public static final SysFile MANAGER = new SysFile( "podman" );
   public static final String CONTAINER_SHORTNAME = "typesetter";
   public static final String CONTAINER_NAME =
     format( "%s:%s", CONTAINER_SHORTNAME, CONTAINER_VERSION );
   private final List<String> mMountPoints = new LinkedList<>();
   public Podman() { }
   @Override
   public int install( final File exe ) {
     // This monstrosity runs the installer in the background without displaying
     // a secondary command window, while blocking until the installer completes
     // and an exit code can be determined. I hate Windows.
     final var builder = processBuilder(
       "cmd", "/c",
       format(
         "start /b /high /wait cmd /c %s /quiet /install & exit ^!errorlevel^!",
         exe.getAbsolutePath()
+      )
     );
     try {
       // Wait for installation to finish (successfully or not).
       return wait( builder.start() );
     } catch( final Exception ignored ) {
       return -1;
+    }
+  }
   @Override
   public void start( final StreamProcessor processor )
     throws CommandNotFoundException {
     machine( processor, "stop" );
     podman( processor, "system", "prune", "--force" );
     machine( processor, "rm", "--force" );
     machine( processor, "init" );
     machine( processor, "start" );
+  }
   @Override
   public void pull( final StreamProcessor processor, final String name )
     throws CommandNotFoundException {
     podman( processor, "pull", "ghcr.io/davejarvis/" + name );
+  }
   /**
    * Runs:
    * <p>
    * <code>podman run --network=host --rm -t IMAGE /bin/sh -lc</code>
    * </p>
    * followed by the given arguments.
+   *
    * @param args The command and arguments to run against the container.
    * @return The exit code from running the container manager (not the
    * exit code from running the command).
    * @throws CommandNotFoundException Container manager couldn't be found.
    */
   @Override
   public int run(
     final StreamProcessor processor,
     final String... args ) throws CommandNotFoundException {
     final var options = new LinkedList<String>();
     options.add( "run" );
     options.add( "--rm" );
     options.add( "--network=host" );
     options.addAll( mMountPoints );
     options.add( "-t" );
     options.add( CONTAINER_NAME );
     options.add( "/bin/sh" );
     options.add( "-lc" );
     final var command = toArray( toArray( options ), args );
     return podman( processor, command );
+  }
   /**
    * Generates a command-line argument representing a mount point between
    * the host and guest systems.
+   *
    * @param hostDir  The host directory to mount in the container.
    * @param guestDir The guest directory to map from the container to host.
    * @param readonly Set {@code true} to make the mount point read-only.
    */
   public void mount(
     final Path hostDir, final String guestDir, final boolean readonly ) {
     assert hostDir != null;
     assert guestDir != null;
     assert !guestDir.isBlank();
     assert hostDir.toFile().isDirectory();
     mMountPoints.add(
       format( "-v%s:%s:%s", hostDir, guestDir, readonly ? "ro" : "Z" )
     );
+  }
   private static void machine(
     final StreamProcessor processor,
     final String... args )
     throws CommandNotFoundException {
     podman( processor, toArray( "machine", args ) );
+  }
   private static int podman(
     final StreamProcessor processor, final String... args )
     throws CommandNotFoundException {
     try {
       final var exe = MANAGER.locate();
       final var path = exe.orElseThrow();
       final var builder = processBuilder( path, args );
       final var process = builder.start();
       processor.start( process.getInputStream() );
       return wait( process );
     } catch( final Exception ex ) {
       throw new CommandNotFoundException( MANAGER.toString() );
+    }
+  }
   /**
    * Performs a blocking wait until the {@link Process} completes.
+   *
    * @param process The {@link Process} to await completion.
    * @return The exit code from running a command.
    * @throws InterruptedException The {@link Process} was interrupted.
    */
   private static int wait( final Process process ) throws InterruptedException {
     final var exitCode = process.waitFor();
     process.destroy();
     return exitCode;
+  }
   private static ProcessBuilder processBuilder( final String... args ) {
     final var builder = new ProcessBuilder( args );
     builder.redirectErrorStream( true );
     return builder;
+  }
   private static ProcessBuilder processBuilder(
     final File file, final String... s ) {
     return processBuilder( toArray( file.getAbsolutePath(), s ) );
+  }
   private static ProcessBuilder processBuilder(
     final Path path, final String... s ) {
     return processBuilder( path.toFile(), s );
+  }
   /**
    * Merges two arrays into a single array.
+   *
    * @param first  The first array to merge before the second array.
    * @param second The second array to merge after the first array.
    * @param <T>    The type of arrays to merge.
    * @return The merged arrays, with the first array elements preceding the
    * second array's elements.
    */
   private static <T> T[] toArray( final T[] first, final T[] second ) {
     assert first != null;
     assert second != null;
     assert first.length > 0;
     assert second.length > 0;
     final var merged = copyOf( first, first.length + second.length );
     arraycopy( second, 0, merged, first.length, second.length );
     return merged;
+  }
   /**
    * Convenience method to merge a single string with an array of strings.
+   *
    * @param first  The first item to prepend to the secondary items.
    * @param second The second item to combine with the first item.
    * @return A new array with the first element at index 0 and the second
    * elements starting at index 1.
    */
   private static String[] toArray( final String first, String... second ) {
     assert first != null;
     assert second != null;
     assert second.length > 0;
     return toArray( new String[]{first}, second );
+  }
+}

A src/main/java/com/keenwrite/typesetting/containerization/StreamProcessor.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.containerization;
 import java.io.InputStream;
 import java.io.PipedInputStream;
 import java.io.PipedOutputStream;
 /**
  * Implementations receive an {@link InputStream} for reading, which happens
  * on a separate thread. Implementations are responsible for starting the
  * thread. This class helps avoid relying on {@link PipedInputStream} and
  * {@link PipedOutputStream} to connect the {@link InputStream} from an
  * instance of {@link ProcessBuilder} to process standard output and standard
  * error for a running command.
  */
 @FunctionalInterface
 public interface StreamProcessor {
   /**
    * Processes the given {@link InputStream} on a separate thread.
    */
   void start( InputStream in );
+}

A src/main/java/com/keenwrite/typesetting/installer/TypesetterInstaller.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer;
 import com.keenwrite.events.ExportFailedEvent;
 import com.keenwrite.preferences.AppKeys;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.typesetting.installer.panes.*;
 import org.controlsfx.dialog.Wizard;
 import org.greenrobot.eventbus.Subscribe;
 import java.util.LinkedList;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.events.Bus.register;
 import static org.apache.commons.lang3.SystemUtils.*;
 /**
  * Responsible for installing the typesetting system and all its requirements.
  */
 public final class TypesetterInstaller {
   private final Workspace mWorkspace;
   /**
    * Registers for the {@link ExportFailedEvent}, which, when received,
    * indicates that the typesetting software must be installed.
+   *
    * @param workspace To set {@link AppKeys#KEY_TYPESET_CONTEXT_THEMES_PATH} via
    *                  {@link TypesetterThemesDownloadPane}.
    */
   public TypesetterInstaller( final Workspace workspace ) {
     assert workspace != null;
     mWorkspace = workspace;
     register( this );
+  }
   @Subscribe
   @SuppressWarnings( "unused" )
   public void handle( final ExportFailedEvent failedEvent ) {
     final var wizard = wizard();
     wizard.showAndWait();
+  }
   private Wizard wizard() {
     final var title = get( "Wizard.typesetter.all.1.install.title" );
     final var wizard = new Wizard( this, title );
     final var wizardFlow = wizardFlow();
     wizard.setFlow( wizardFlow );
     return wizard;
+  }
   private Wizard.Flow wizardFlow() {
     final var panels = wizardPanes();
     return new Wizard.LinearFlow( panels );
+  }
   private InstallerPane[] wizardPanes() {
     final var panes = new LinkedList<InstallerPane>();
     // STEP 1: Introduction panel (all)
     panes.add( new IntroductionPane() );
     if( IS_OS_WINDOWS ) {
       // STEP 2 a: Download container (Windows)
       panes.add( new WindowsManagerDownloadPane() );
       // STEP 2 b: Install container (Windows)
       panes.add( new WindowsManagerInstallPane() );
+    }
     else if( IS_OS_UNIX ) {
       // STEP 2: Install container (Unix)
       panes.add( new UnixManagerInstallPane() );
+    }
     else {
       // STEP 2: Install container (other)
       panes.add( new UniversalManagerInstallPane() );
+    }
     if( !IS_OS_LINUX ) {
       // STEP 3: Initialize container (all except Linux)
       panes.add( new ManagerInitializationPane() );
+    }
     // STEP 4: Install typesetter container image (all)
     panes.add( new TypesetterImageDownloadPane() );
     // STEP 5: Download and install typesetter themes (all)
     panes.add( new TypesetterThemesDownloadPane( mWorkspace ) );
     return panes.toArray( InstallerPane[]::new );
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/WizardConstants.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer;
 /**
  * Provides common constants across all panes.
  */
 public class WizardConstants {
   private WizardConstants() { }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/AbstractDownloadPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 import com.keenwrite.io.SysFile;
 import javafx.collections.ObservableMap;
 import javafx.concurrent.Task;
 import javafx.scene.control.Label;
 import javafx.scene.layout.BorderPane;
 import org.controlsfx.dialog.Wizard;
 import java.io.File;
 import java.net.URI;
 import static com.keenwrite.Bootstrap.USER_DATA_DIR;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.Messages.getUri;
 /**
  * Responsible for asynchronous downloads.
  */
 public abstract class AbstractDownloadPane extends InstallerPane {
   private static final String STATUS = ".status";
   private final Label mStatus;
   private final File mTarget;
   private final String mFilename;
   private final URI mUri;
   public AbstractDownloadPane() {
     mUri = getUri( getPrefix() + ".download.link.url" );
     mFilename = toFilename( mUri );
     final var directory = USER_DATA_DIR;
     mTarget = directory.resolve( mFilename ).toFile();
     final var source = labelf( getPrefix() + ".paths", mFilename, directory );
     mStatus = labelf( getPrefix() + STATUS + ".progress", 0, 0 );
     final var border = new BorderPane();
     border.setTop( source );
     border.setCenter( spacer() );
     border.setBottom( mStatus );
     setContent( border );
+  }
   @Override
   public void onEnteringPage( final Wizard wizard ) {
     disableNext( true );
     final var threadName = getClass().getCanonicalName();
     final var properties = wizard.getProperties();
     final var thread = properties.get( threadName );
     if( thread instanceof Task<?> downloader && downloader.isRunning() ) {
       return;
+    }
     updateProperties( properties );
     final var target = getTarget();
     final var sysFile = new SysFile( target );
     final var checksum = getChecksum();
     if( sysFile.exists() ) {
       final var checksumOk = sysFile.isChecksum( checksum );
       final var suffix = checksumOk ? ".ok" : ".no";
       updateStatus( STATUS + ".checksum" + suffix, mFilename );
       disableNext( !checksumOk );
+    }
     else {
       final var task = downloadAsync( mUri, target, ( progress, bytes ) -> {
         final var suffix = progress < 0 ? ".bytes" : ".progress";
         updateStatus( STATUS + suffix, progress, bytes );
       } );
       properties.put( threadName, task );
       task.setOnSucceeded( e -> onDownloadSucceeded( threadName, properties ) );
       task.setOnFailed( e -> onDownloadFailed( threadName, properties ) );
       task.setOnCancelled( e -> onDownloadFailed( threadName, properties ) );
+    }
+  }
   protected void updateProperties(
     final ObservableMap<Object, Object> properties ) {
+  }
   @Override
   protected String getHeaderKey() {
     return getPrefix() + ".header";
+  }
   protected File getTarget() {
     return mTarget;
+  }
   protected abstract String getChecksum();
   protected abstract String getPrefix();
   protected void onDownloadSucceeded(
     final String threadName, final ObservableMap<Object, Object> properties ) {
     updateStatus( STATUS + ".success" );
     properties.remove( threadName );
     disableNext( false );
+  }
   protected void onDownloadFailed(
     final String threadName, final ObservableMap<Object, Object> properties ) {
     updateStatus( STATUS + ".failure" );
     properties.remove( threadName );
+  }
   protected void updateStatus( final String suffix, final Object... args ) {
     update( mStatus, get( getPrefix() + suffix, args ) );
+  }
   protected void deleteTarget() {
     final var ignored = getTarget().delete();
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/InstallerPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 import com.keenwrite.events.HyperlinkOpenEvent;
 import com.keenwrite.io.downloads.DownloadManager;
 import com.keenwrite.io.downloads.DownloadManager.ProgressListener;
 import com.keenwrite.typesetting.containerization.ContainerManager;
 import com.keenwrite.typesetting.containerization.Podman;
 import javafx.animation.Animation;
 import javafx.animation.RotateTransition;
 import javafx.concurrent.Task;
 import javafx.geometry.Insets;
 import javafx.scene.Node;
 import javafx.scene.control.*;
 import javafx.scene.image.ImageView;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.FlowPane;
 import javafx.scene.layout.Pane;
 import org.controlsfx.dialog.Wizard;
 import org.controlsfx.dialog.WizardPane;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.net.URI;
 import java.nio.file.Paths;
 import java.util.concurrent.Callable;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG;
 import static java.lang.System.lineSeparator;
 import static javafx.animation.Interpolator.LINEAR;
 import static javafx.application.Platform.runLater;
 import static javafx.scene.control.ButtonBar.ButtonData.NEXT_FORWARD;
 import static javafx.scene.control.ContentDisplay.RIGHT;
 import static javafx.util.Duration.seconds;
 /**
  * Responsible for creating a {@link WizardPane} with a common header for all
  * subclasses.
  */
 public abstract class InstallerPane extends WizardPane {
   /**
    * Unique key name to store the animation object so that it can be stopped.
    */
   private static final String PROP_ROTATION = "Wizard.typesetter.next.animate";
   /**
    * Defines amount of spacing between the installer's UI widgets, in pixels.
    */
   static final int PAD = 10;
   private static final double HEADER_FONT_SCALE = 1.25;
   public InstallerPane() {
     setHeader( createHeader() );
+  }
   /**
    * When leaving the page, stop the animation. This is idempotent.
+   *
    * @param wizard The wizard controlling the installer steps.
    */
   @Override
   public void onExitingPage( final Wizard wizard ) {
     super.onExitingPage( wizard );
     runLater( () -> stopAnimation( getNextButton() ) );
+  }
   /**
    * Returns the property bundle key representing the dialog box title.
    */
   protected abstract String getHeaderKey();
   private BorderPane createHeader() {
     final var headerLabel = label( getHeaderKey() );
     headerLabel.setScaleX( HEADER_FONT_SCALE );
     headerLabel.setScaleY( HEADER_FONT_SCALE );
     final var separator = new Separator();
     separator.setPadding( new Insets( PAD, 0, 0, 0 ) );
     final var header = new BorderPane();
     header.setCenter( headerLabel );
     header.setRight( new ImageView( ICON_DIALOG ) );
     header.setBottom( separator );
     header.setPadding( new Insets( PAD, PAD, 0, PAD ) );
     return header;
+  }
   /**
    * Disables the "Next" button during the installer. Normally disabling UI
    * elements is an anti-pattern (along with modal dialogs); however, in this
    * case, installation cannot proceed until each step is successfully
    * completed. Further, there may be "misleading" success messages shown
    * in the output panel, which the user may take as the step being complete.
+   *
    * @param disable Set to {@code true} to disable the button.
    */
   void disableNext( final boolean disable ) {
     runLater( () -> {
       final var button = getNextButton();
       button.setDisable( disable );
       if( disable ) {
         startAnimation( button );
+      }
       else {
         stopAnimation( button );
+      }
     } );
+  }
   /**
    * Returns the {@link Button} for advancing the wizard to the next pane.
+   *
    * @return The Next button, if present, otherwise a new {@link Button}
    * instance so that API calls will succeed, despite not affecting the UI.
    */
   private Button getNextButton() {
     for( final var buttonType : getButtonTypes() ) {
       final var buttonData = buttonType.getButtonData();
       if( buttonData.equals( NEXT_FORWARD ) &&
         lookupButton( buttonType ) instanceof Button button ) {
         return button;
+      }
+    }
     // If there's no Next button, return a fake button.
     return new Button();
+  }
   private void startAnimation( final Button button ) {
     // Create an image that is slightly taller than the button's font.
     final var graphic = new ImageView( ICON_DIALOG );
     graphic.setFitHeight( button.getFont().getSize() + 2 );
     graphic.setPreserveRatio( true );
     graphic.setSmooth( true );
     button.setGraphic( graphic );
     button.setGraphicTextGap( PAD );
     button.setContentDisplay( RIGHT );
     final var rotation = new RotateTransition( seconds( 1 ), graphic );
     getProperties().put( PROP_ROTATION, rotation );
     rotation.setCycleCount( Animation.INDEFINITE );
     rotation.setByAngle( 360 );
     rotation.setInterpolator( LINEAR );
     rotation.play();
+  }
   private void stopAnimation( final Button button ) {
     final var animation = getProperties().get( PROP_ROTATION );
     if( animation instanceof RotateTransition rotation ) {
       rotation.stop();
       button.setGraphic( null );
       getProperties().remove( PROP_ROTATION );
+    }
+  }
   static TitledPane titledPane( final String title, final Node child ) {
     final var pane = new TitledPane( title, child );
     pane.setAnimated( false );
     pane.setCollapsible( false );
     pane.setExpanded( true );
     return pane;
+  }
   static TextArea textArea( final int rows, final int cols ) {
     final var textarea = new TextArea();
     textarea.setEditable( false );
     textarea.setWrapText( true );
     textarea.setPrefRowCount( rows );
     textarea.setPrefColumnCount( cols );
     return textarea;
+  }
   static Label label( final String key ) {
     return new Label( get( key ) );
+  }
   /**
    * Like printf for labels.
+   *
    * @param key    The property key to look up.
    * @param values The values to insert at the placeholders.
    * @return The formatted text with values replaced.
    */
   @SuppressWarnings( "SpellCheckingInspection" )
   static Label labelf( final String key, final Object... values ) {
     return new Label( get( key, values ) );
+  }
   @SuppressWarnings( "SameParameterValue" )
   static Button button( final String key ) {
     return new Button( get( key ) );
+  }
   static Node flowPane( final Node... nodes ) {
     return new FlowPane( nodes );
+  }
   /**
    * Provides vertical spacing between {@link Node}s.
+   *
    * @return A new empty vertical gap widget.
    */
   static Node spacer() {
     final var spacer = new Pane();
     spacer.setPadding( new Insets( PAD, 0, 0, 0 ) );
     return spacer;
+  }
   static Hyperlink hyperlink( final String prefix ) {
     final var label = get( prefix + ".lbl" );
     final var url = get( prefix + ".url" );
     final var link = new Hyperlink( label );
     link.setOnAction( e -> browse( url ) );
     link.setTooltip( new Tooltip( url ) );
     return link;
+  }
   /**
    * Opens a browser window off of the JavaFX main execution thread. This
    * is necessary so that the links open immediately, instead of being blocked
    * by any modal dialog (i.e., the {@link Wizard} instance).
+   *
    * @param property The property key name associated with a hyperlink URL.
    */
   static void browse( final String property ) {
     final var url = get( property );
     final var task = createTask( () -> {
       HyperlinkOpenEvent.fire( url );
       return null;
     } );
     final var thread = createThread( task );
     thread.start();
+  }
   static <T> Task<T> createTask( final Callable<T> callable ) {
     return new Task<>() {
       @Override
       protected T call() throws Exception {
         return callable.call();
+      }
     };
+  }
   static <T> Thread createThread( final Task<T> task ) {
     final var thread = new Thread( task );
     thread.setDaemon( true );
     return thread;
+  }
   /**
    * Creates a container that can have its standard output read as an input
    * stream that's piped directly to a {@link TextArea}.
+   *
    * @return An object that can perform tasks against a container.
    */
   static ContainerManager createContainer() {
     return new Podman();
+  }
   static void update( final Label node, final String text ) {
     runLater( () -> node.setText( text ) );
+  }
   static void append( final TextArea node, final String text ) {
     runLater( () -> {
       node.appendText( text );
       node.appendText( lineSeparator() );
     } );
+  }
   /**
    * Downloads a resource to a local file in a separate {@link Thread}.
+   *
    * @param uri      The resource to download.
    * @param file     The destination mTarget for the resource.
    * @param listener Receives updates as the download proceeds.
    */
   static Task<Void> downloadAsync(
     final URI uri,
     final File file,
     final ProgressListener listener ) {
     final Task<Void> task = createTask( () -> {
       try( final var token = DownloadManager.open( uri ) ) {
         final var output = new FileOutputStream( file );
         final var downloader = token.download( output, listener );
         downloader.run();
+      }
       return null;
     } );
     createThread( task ).start();
     return task;
+  }
   static String toFilename( final URI uri ) {
     return Paths.get( uri.getPath() ).toFile().getName();
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/IntroductionPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 /**
  * Responsible for informing the user as to what will happen next.
  */
 public final class IntroductionPane extends InstallerPane {
   private static final String PREFIX = "Wizard.typesetter.all.1.install";
   public IntroductionPane() {
     setContent( flowPane(
       hyperlink( PREFIX + ".about.container.link" ),
       label( PREFIX + ".about.text.1" ),
       hyperlink( PREFIX + ".about.typesetter.link" ),
       label( PREFIX + ".about.text.2" )
     ) );
+  }
   @Override
   protected String getHeaderKey() {
     return PREFIX + ".header";
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/ManagerInitializationPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 import com.keenwrite.typesetting.containerization.ContainerManager;
 /**
  * Responsible for initializing the container manager on all platforms except
  * for Linux.
  */
 public final class ManagerInitializationPane extends ManagerOutputPane {
   private static final String PREFIX =
     "Wizard.typesetter.all.3.install.container";
   public ManagerInitializationPane() {
     super(
       PREFIX + ".correct",
       PREFIX + ".missing",
       ContainerManager::start,
     );
+  }
   @Override
   public String getHeaderKey() {
     return PREFIX + ".header";
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/ManagerOutputPane.java

 package com.keenwrite.typesetting.installer.panes;
 import com.keenwrite.io.CommandNotFoundException;
 import com.keenwrite.typesetting.containerization.ContainerManager;
 import com.keenwrite.typesetting.containerization.StreamProcessor;
 import javafx.concurrent.Task;
 import javafx.scene.control.TextArea;
 import javafx.scene.layout.BorderPane;
 import org.apache.commons.lang3.function.FailableBiConsumer;
 import org.controlsfx.dialog.Wizard;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.io.StreamGobbler.gobble;
 /**
  * Responsible for showing the output from running commands against a container
  * manager. There are a few installation steps that run different commands
  * against the installer, which are platform-specific and cannot be merged.
  * Common functionality between them is codified in this class.
  */
 public abstract class ManagerOutputPane extends InstallerPane {
   private final String PROP_EXECUTOR = getClass().getCanonicalName();
   private final String mCorrectKey;
   private final String mMissingKey;
   private final FailableBiConsumer
     <ContainerManager, StreamProcessor, CommandNotFoundException> mFc;
   private final ContainerManager mContainer;
   private final TextArea mTextArea;
   public ManagerOutputPane(
     final String correctKey,
     final String missingKey,
     final FailableBiConsumer
       <ContainerManager, StreamProcessor, CommandNotFoundException> fc,
     final int cols
   ) {
     mFc = fc;
     mCorrectKey = correctKey;
     mMissingKey = missingKey;
     mTextArea = textArea( 5, cols );
     mContainer = createContainer();
     final var borderPane = new BorderPane();
     final var titledPane = titledPane( "Output", mTextArea );
     borderPane.setBottom( titledPane );
     setContent( borderPane );
+  }
   @Override
   public void onEnteringPage( final Wizard wizard ) {
     disableNext( true );
     try {
       final var properties = wizard.getProperties();
       final var thread = properties.get( PROP_EXECUTOR );
       if( thread instanceof Thread executor && executor.isAlive() ) {
         return;
+      }
       final Task<Void> task = createTask( () -> {
         mFc.accept(
           mContainer,
           input -> gobble( input, line -> append( mTextArea, line ) )
         );
         properties.remove( thread );
         return null;
       } );
       task.setOnSucceeded( event -> {
         append( mTextArea, get( mCorrectKey ) );
         properties.remove( thread );
         disableNext( false );
       } );
       task.setOnFailed( event -> append( mTextArea, get( mMissingKey ) ) );
       task.setOnCancelled( event -> append( mTextArea, get( mMissingKey ) ) );
       final var executor = createThread( task );
       properties.put( PROP_EXECUTOR, executor );
       executor.start();
     } catch( final Exception e ) {
       throw new RuntimeException( e );
+    }
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/TypesetterImageDownloadPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 import static com.keenwrite.typesetting.containerization.Podman.CONTAINER_NAME;
 /**
  * Responsible for installing the typesetter's image via the container manager.
  */
 public final class TypesetterImageDownloadPane extends ManagerOutputPane {
   private static final String PREFIX =
     "Wizard.typesetter.all.4.download.image";
   public TypesetterImageDownloadPane() {
     super(
       PREFIX + ".correct",
       PREFIX + ".missing",
       (container, processor) -> container.pull( processor, CONTAINER_NAME ),
     );
+  }
   @Override
   public String getHeaderKey() {
     return PREFIX + ".header";
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/TypesetterThemesDownloadPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 import com.keenwrite.io.UserDataDir;
 import com.keenwrite.io.Zip;
 import com.keenwrite.preferences.Workspace;
 import javafx.collections.ObservableMap;
 import org.controlsfx.dialog.Wizard;
 import java.io.File;
 import java.io.IOException;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preferences.AppKeys.KEY_TYPESET_CONTEXT_THEMES_PATH;
 /**
  * Responsible for downloading themes into the application's data directory.
  * The data directory differs between platforms, which is handled
  * transparently by the {@link UserDataDir} class.
  */
 public class TypesetterThemesDownloadPane extends AbstractDownloadPane {
   private static final String PREFIX =
     "Wizard.typesetter.all.5.download.themes";
   private final Workspace mWorkspace;
   public TypesetterThemesDownloadPane( final Workspace workspace ) {
     assert workspace != null;
     mWorkspace = workspace;
+  }
   @Override
   public void onEnteringPage( final Wizard wizard ) {
     // Delete the target themes file to force re-download so that unzipping
     // the file takes place. This side-steps checksum validation, which would
     // be best implemented after downloading.
     deleteTarget();
     super.onEnteringPage( wizard );
+  }
   @Override
   protected void onDownloadSucceeded(
     final String threadName, final ObservableMap<Object, Object> properties ) {
     super.onDownloadSucceeded( threadName, properties );
     try {
       process( getTarget() );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   private void process( final File target ) throws IOException {
     Zip.extract( target.toPath() );
     // Replace the default themes directory with the downloaded version.
     final var root = Zip.root( target.toPath() ).toFile();
     // Make sure the typesetter will know where to find the themes.
     mWorkspace.fileProperty( KEY_TYPESET_CONTEXT_THEMES_PATH ).set( root );
     mWorkspace.save();
     // The themes pack is no longer needed.
     deleteTarget();
+  }
   @Override
   protected String getPrefix() {
     return PREFIX;
+  }
   @Override
   protected String getChecksum() {
     return get( "Wizard.typesetter.themes.checksum" );
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/UniversalManagerInstallPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 /**
  * Responsible for installing the container manager for any operating system
  * that was not explicitly detected.
  */
 public final class UniversalManagerInstallPane extends InstallerPane {
   private static final String PREFIX =
     "Wizard.typesetter.all.2.install.container";
   public UniversalManagerInstallPane() { }
   @Override
   protected String getHeaderKey() {
     return PREFIX + ".header";
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/UnixManagerInstallPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 import com.keenwrite.ui.clipboard.Clipboard;
 import javafx.geometry.Insets;
 import javafx.scene.Node;
 import javafx.scene.control.ButtonBar;
 import javafx.scene.control.ComboBox;
 import javafx.scene.control.TextArea;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.VBox;
 import org.jetbrains.annotations.NotNull;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.Messages.getInt;
 import static java.lang.String.format;
 import static org.apache.commons.lang3.SystemUtils.IS_OS_MAC;
 public final class UnixManagerInstallPane extends InstallerPane {
   private static final String PREFIX =
     "Wizard.typesetter.unix.2.install.container";
   private final TextArea mCommands = textArea( 2, 40 );
   public UnixManagerInstallPane() {
     final var titledPane = titledPane( "Run", mCommands );
     final var comboBox = createUnixOsCommandMap();
     final var selection = comboBox.getSelectionModel();
     selection
       .selectedItemProperty()
       .addListener( ( c, o, n ) -> mCommands.setText( n.command() ) );
     // Auto-select if running on macOS.
     if( IS_OS_MAC ) {
       final var items = comboBox.getItems();
       for( final var item : items ) {
         if( "macOS".equalsIgnoreCase( item.name ) ) {
           selection.select( item );
           break;
+        }
+      }
+    }
     else {
       selection.select( 0 );
+    }
     final var distro = label( PREFIX + ".os" );
     distro.setText( distro.getText() + ":" );
     distro.setPadding( new Insets( PAD / 2.0, PAD, 0, 0 ) );
     final var hbox = new HBox();
     hbox.getChildren().add( distro );
     hbox.getChildren().add( comboBox );
     hbox.setPadding( new Insets( 0, 0, PAD, 0 ) );
     final var stepsPane = new VBox();
     final var steps = stepsPane.getChildren();
     steps.add( label( PREFIX + ".step.0" ) );
     steps.add( spacer() );
     steps.add( label( PREFIX + ".step.1" ) );
     steps.add( label( PREFIX + ".step.2" ) );
     steps.add( label( PREFIX + ".step.3" ) );
     steps.add( label( PREFIX + ".step.4" ) );
     steps.add( spacer() );
     steps.add( flowPane(
       label( PREFIX + ".details.prefix" ),
       hyperlink( PREFIX + ".details.link" ),
       label( PREFIX + ".details.suffix" )
     ) );
     steps.add( spacer() );
     final var border = new BorderPane();
     border.setTop( stepsPane );
     border.setCenter( hbox );
     border.setBottom( titledPane );
     setContent( border );
+  }
   @Override
   public Node createButtonBar() {
     final var node = super.createButtonBar();
     final var layout = new BorderPane();
     final var copyButton = button( PREFIX + ".copy.began" );
     // Change the label to indicate clipboard is updated.
     copyButton.setOnAction( event -> {
       Clipboard.write( mCommands.getText() );
       copyButton.setText( get( PREFIX + ".copy.ended" ) );
     } );
     if( node instanceof ButtonBar buttonBar ) {
       copyButton.setMinWidth( buttonBar.getButtonMinWidth() );
+    }
     layout.setPadding( new Insets( PAD, PAD, PAD, PAD ) );
     layout.setLeft( copyButton );
     layout.setRight( node );
     return layout;
+  }
   @Override
   protected String getHeaderKey() {
     return PREFIX + ".header";
+  }
   private record UnixOsCommand( String name, String command )
     implements Comparable<UnixOsCommand> {
     @Override
     public int compareTo(
       final @NotNull UnixOsCommand other ) {
       return toString().compareToIgnoreCase( other.toString() );
+    }
     @Override
     public String toString() {
       return name;
+    }
+  }
   /**
    * Creates a collection of *nix distributions mapped to instructions for users
    * to run in a terminal.
+   *
    * @return A map of *nix to instructions.
    */
   private static ComboBox<UnixOsCommand> createUnixOsCommandMap() {
     new ComboBox<UnixOsCommand>();
     final var comboBox = new ComboBox<UnixOsCommand>();
     final var items = comboBox.getItems();
     final var prefix = PREFIX + ".command";
     final var distros = getInt( prefix + ".distros", 14 );
     for( int i = 1; i <= distros; i++ ) {
       final var suffix = format( ".%02d", i );
       final var name = get( prefix + ".os.name" + suffix );
       final var command = get( prefix + ".os.text" + suffix );
       items.add( new UnixOsCommand( name, command ) );
+    }
     items.sort( UnixOsCommand::compareTo );
     return comboBox;
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/WindowsManagerDownloadPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 import javafx.collections.ObservableMap;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.typesetting.installer.panes.WindowsManagerInstallPane.WIN_BIN;
 /**
  * Responsible for downloading the container manager software on Windows.
  */
 public final class WindowsManagerDownloadPane extends AbstractDownloadPane {
   private static final String PREFIX =
     "Wizard.typesetter.win.2.download.container";
   @Override
   protected void updateProperties(
     final ObservableMap<Object, Object> properties ) {
     properties.put( WIN_BIN, getTarget() );
+  }
   @Override
   protected String getPrefix() {
     return PREFIX;
+  }
   @Override
   protected String getChecksum() {
     return get( "Wizard.typesetter.container.checksum" );
+  }
+}

A src/main/java/com/keenwrite/typesetting/installer/panes/WindowsManagerInstallPane.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.typesetting.installer.panes;
 import com.keenwrite.typesetting.containerization.ContainerManager;
 import javafx.scene.control.TextArea;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.VBox;
 import org.controlsfx.dialog.Wizard;
 import java.io.File;
 import static com.keenwrite.Messages.get;
 /**
  * Responsible for installing the container manager on Windows.
  */
 public final class WindowsManagerInstallPane extends InstallerPane {
   /**
    * Property for the installation thread to help with reentrancy.
    */
   private static final String WIN_INSTALLER = "windows.container.installer";
   /**
    * Shared property to track name of container manager binary file.
    */
   static final String WIN_BIN = "windows.container.binary";
   private static final String PREFIX =
     "Wizard.typesetter.win.2.install.container";
   private final ContainerManager mContainer;
   private final TextArea mCommands;
   public WindowsManagerInstallPane() {
     mCommands = textArea( 2, 55 );
     final var titledPane = titledPane( "Output", mCommands );
     append( mCommands, get( PREFIX + ".status.running" ) );
     final var stepsPane = new VBox();
     final var steps = stepsPane.getChildren();
     steps.add( label( PREFIX + ".step.0" ) );
     steps.add( spacer() );
     steps.add( label( PREFIX + ".step.1" ) );
     steps.add( label( PREFIX + ".step.2" ) );
     steps.add( label( PREFIX + ".step.3" ) );
     steps.add( spacer() );
     steps.add( titledPane );
     final var border = new BorderPane();
     border.setTop( stepsPane );
     mContainer = createContainer();
+  }
   @Override
   public void onEnteringPage( final Wizard wizard ) {
     disableNext( true );
     // Pull the fully qualified installer path from the properties.
     final var properties = wizard.getProperties();
     final var thread = properties.get( WIN_INSTALLER );
     if( thread instanceof Thread installer && installer.isAlive() ) {
       return;
+    }
     final var binary = properties.get( WIN_BIN );
     final var key = PREFIX + ".status";
     if( binary instanceof File exe ) {
       final var task = createTask( () -> {
         final var exit = mContainer.install( exe );
         // Remove the installer after installation is finished.
         properties.remove( thread );
         final var msg = exit == 0
           ? get( key + ".success" )
           : get( key + ".failure", exit );
         append( mCommands, msg );
         disableNext( exit != 0 );
         return null;
       } );
       final var installer = createThread( task );
       properties.put( WIN_INSTALLER, installer );
       installer.start();
+    }
     else {
       append( mCommands, get( PREFIX + ".unknown", binary ) );
+    }
+  }
   @Override
   public String getHeaderKey() {
     return PREFIX + ".header";
+  }
+}

A src/main/java/com/keenwrite/ui/actions/Action.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.actions;
 import com.keenwrite.Messages;
 import com.keenwrite.util.GenericBuilder;
 import javafx.event.ActionEvent;
 import javafx.event.EventHandler;
 import javafx.scene.control.Button;
 import javafx.scene.control.Menu;
 import javafx.scene.control.MenuItem;
 import javafx.scene.control.Tooltip;
 import javafx.scene.input.KeyCombination;
 import java.util.ArrayList;
 import java.util.List;
 import static com.keenwrite.constants.Constants.ACTION_PREFIX;
 import static com.keenwrite.ui.fonts.IconFactory.createGraphic;
 import static javafx.scene.input.KeyCombination.valueOf;
 /**
  * Defines actions the user can take through GUI interactions
  */
 public final class Action implements MenuAction {
   private final String mText;
   private final KeyCombination mAccelerator;
   private final String mIcon;
   private final EventHandler<ActionEvent> mHandler;
   private final List<MenuAction> mSubActions = new ArrayList<>();
   /**
    * Provides a fluent interface around constructing actions so that duplication
    * can be avoided.
    */
   public static class Builder {
     private String mText;
     private String mAccelerator;
     private String mIcon;
     private EventHandler<ActionEvent> mHandler;
     /**
      * Sets the text, icon, and accelerator for a given action identifier.
      * See the messages properties file for details.
+     *
      * @param id The identifier to look up in the properties file.
      * @return An instance of {@link Builder} that can be built into an
      * instance of {@link Action}.
      */
     public Builder setId( final String id ) {
       final var prefix = ACTION_PREFIX + id + ".";
       final var text = prefix + "text";
       final var icon = prefix + "icon";
       final var accelerator = prefix + "accelerator";
       final var builder = setText( text ).setIcon( icon );
       return Messages.containsKey( accelerator )
         ? builder.setAccelerator( Messages.get( accelerator ) )
         : builder;
+    }
     /**
      * Sets the action text based on a resource bundle key.
+     *
      * @param key The key to look up in the {@link Messages}.
      * @return The corresponding value, or the key name if none found.
      */
     private Builder setText( final String key ) {
       mText = Messages.get( key, key );
       return this;
+    }
     private Builder setAccelerator( final String accelerator ) {
       mAccelerator = accelerator;
       return this;
+    }
     private Builder setIcon( final String iconKey ) {
       assert iconKey != null;
       // If there's no icon associated with the icon key name, don't attempt
       // to create a graphic for the icon, because it won't exist.
       final var iconName = Messages.get( iconKey );
       mIcon = iconKey.equals( iconName ) ? "" : iconName;
       return this;
+    }
     public Builder setHandler( final EventHandler<ActionEvent> handler ) {
       mHandler = handler;
       return this;
+    }
     public Action build() {
       return new Action( mText, mAccelerator, mIcon, mHandler );
+    }
+  }
   /**
    * TODO: Reuse the {@link GenericBuilder}.
+   *
    * @return The {@link Builder} for an instance of {@link Action}.
    */
   public static Builder builder() {
     return new Builder();
+  }
   private static Button createIconButton( final String icon ) {
     return new Button( null, createGraphic( icon ) );
+  }
   public Action(
     final String text,
     final String accelerator,
     final String icon,
     final EventHandler<ActionEvent> handler ) {
     assert text != null;
     assert handler != null;
     mText = text;
     mAccelerator = accelerator == null ? null : valueOf( accelerator );
     mIcon = icon;
     mHandler = handler;
+  }
   @Override
   public MenuItem createMenuItem() {
     // This will either become a menu or a menu item, depending on whether
     // sub-actions are defined.
     final MenuItem menuItem;
     if( mSubActions.isEmpty() ) {
       // Regular menu item has no sub-menus.
       menuItem = new MenuItem( mText );
+    }
     else {
       // Sub-actions are translated into sub-menu items beneath this action.
       final var submenu = new Menu( mText );
       for( final var action : mSubActions ) {
         // Recursive call that creates a sub-menu hierarchy.
         submenu.getItems().add( action.createMenuItem() );
+      }
       menuItem = submenu;
+    }
     if( mAccelerator != null ) {
       menuItem.setAccelerator( mAccelerator );
+    }
     if( mIcon != null ) {
       menuItem.setGraphic( createGraphic( mIcon ) );
+    }
     menuItem.setOnAction( mHandler );
     return menuItem;
+  }
   @Override
   public Button createToolBarNode() {
     final var button = createIconButton( mIcon );
     var tooltip = mText;
     if( tooltip.endsWith( "..." ) ) {
       tooltip = tooltip.substring( 0, tooltip.length() - 3 );
+    }
     // Do not display mnemonic accelerator character in tooltip text.
     // The accelerator key will still be available, this is display-only.
     tooltip = tooltip.replace( "_", "" );
     if( mAccelerator != null ) {
       tooltip += " (" + mAccelerator.getDisplayText() + ')';
+    }
     button.setTooltip( new Tooltip( tooltip ) );
     button.setFocusTraversable( false );
     button.setOnAction( mHandler );
     return button;
+  }
   /**
    * Adds subordinate actions to the menu. This is used to establish sub-menu
    * relationships. The default behaviour does not wire up any registration;
    * subclasses are responsible for handling how actions relate to one another.
+   *
    * @param action Actions that only exist with respect to this action.
    */
   public MenuAction addSubActions( final MenuAction... action ) {
     mSubActions.addAll( List.of( action ) );
     return this;
+  }
+}

A src/main/java/com/keenwrite/ui/actions/ApplicationBars.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.actions;
 import com.keenwrite.ui.controls.EventedStatusBar;
 import javafx.event.ActionEvent;
 import javafx.event.EventHandler;
 import javafx.scene.Node;
 import javafx.scene.control.Menu;
 import javafx.scene.control.MenuBar;
 import javafx.scene.control.MenuItem;
 import javafx.scene.control.ToolBar;
 import org.controlsfx.control.StatusBar;
 import org.jetbrains.annotations.NotNull;
 import java.util.HashMap;
 import java.util.Map;
 import static com.keenwrite.Messages.get;
 /**
  * Responsible for wiring all application actions to menus, toolbar buttons,
  * and keyboard shortcuts.
  */
 public final class ApplicationBars {
   private static final Map<String, Action> sMap = new HashMap<>( 64 );
   /**
    * Empty constructor.
    */
   public ApplicationBars() {
+  }
   /**
    * Creates the main application affordances.
+   *
    * @param actions The {@link GuiCommands} that map user interface
    *                selections to executable code.
    * @return An instance of {@link MenuBar} that contains the menu.
    */
   public static MenuBar createMenuBar( final GuiCommands actions ) {
     final var SEPARATOR = new SeparatorAction();
     return new MenuBar(
       createMenuFile( actions, SEPARATOR ),
       createMenuEdit( actions, SEPARATOR ),
       createMenuFormat( actions ),
       createMenuInsert( actions, SEPARATOR ),
       createMenuVariable( actions, SEPARATOR ),
       createMenuView( actions, SEPARATOR ),
       createMenuHelp( actions )
     );
+  }
   @NotNull
   private static Menu createMenuFile(
     final GuiCommands actions, final SeparatorAction SEPARATOR ) {
     // @formatter:off
     return createMenu(
       get( "Main.menu.file" ),
       addAction( "file.new", e -> actions.file_new() ),
       addAction( "file.open", e -> actions.file_open() ),
       SEPARATOR,
       addAction( "file.close", e -> actions.file_close() ),
       addAction( "file.close_all", e -> actions.file_close_all() ),
       SEPARATOR,
       addAction( "file.save", e -> actions.file_save() ),
       addAction( "file.save_as", e -> actions.file_save_as() ),
       addAction( "file.save_all", e -> actions.file_save_all() ),
       SEPARATOR,
       addAction( "file.export", e -> { } )
         .addSubActions(
           addAction( "file.export.pdf", e -> actions.file_export_pdf() ),
           addAction( "file.export.pdf.dir", e -> actions.file_export_pdf_dir() ),
           addAction( "file.export.pdf.repeat", e -> actions.file_export_repeat() ),
           addAction( "file.export.html_svg", e -> actions.file_export_html_svg() ),
           addAction( "file.export.html_tex", e -> actions.file_export_html_tex() ),
           addAction( "file.export.xhtml_tex", e -> actions.file_export_xhtml_tex() )
         ),
       SEPARATOR,
       addAction( "file.exit", e -> actions.file_exit() )
     );
     // @formatter:on
+  }
   @NotNull
   private static Menu createMenuEdit(
     final GuiCommands actions, final SeparatorAction SEPARATOR ) {
     return createMenu(
       get( "Main.menu.edit" ),
       SEPARATOR,
       addAction( "edit.undo", e -> actions.edit_undo() ),
       addAction( "edit.redo", e -> actions.edit_redo() ),
       SEPARATOR,
       addAction( "edit.cut", e -> actions.edit_cut() ),
       addAction( "edit.copy", e -> actions.edit_copy() ),
       addAction( "edit.paste", e -> actions.edit_paste() ),
       addAction( "edit.select_all", e -> actions.edit_select_all() ),
       SEPARATOR,
       addAction( "edit.find", e -> actions.edit_find() ),
       addAction( "edit.find_next", e -> actions.edit_find_next() ),
       addAction( "edit.find_prev", e -> actions.edit_find_prev() ),
       SEPARATOR,
       addAction( "edit.preferences", e -> actions.edit_preferences() )
     );
+  }
   @NotNull
   private static Menu createMenuFormat( final GuiCommands actions ) {
     return createMenu(
       get( "Main.menu.format" ),
       addAction( "format.bold", e -> actions.format_bold() ),
       addAction( "format.italic", e -> actions.format_italic() ),
       addAction( "format.monospace", e -> actions.format_monospace() ),
       addAction( "format.superscript", e -> actions.format_superscript() ),
       addAction( "format.subscript", e -> actions.format_subscript() ),
       addAction( "format.strikethrough", e -> actions.format_strikethrough() )
     );
+  }
   @NotNull
   private static Menu createMenuInsert(
     final GuiCommands actions,
     final SeparatorAction SEPARATOR ) {
     // @formatter:off
     return createMenu(
       get( "Main.menu.insert" ),
       addAction( "insert.blockquote", e -> actions.insert_blockquote() ),
       addAction( "insert.code", e -> actions.insert_code() ),
       addAction( "insert.fenced_code_block", e -> actions.insert_fenced_code_block() ),
       SEPARATOR,
       addAction( "insert.link", e -> actions.insert_link() ),
       addAction( "insert.image", e -> actions.insert_image() ),
       SEPARATOR,
       addAction( "insert.heading_1", e -> actions.insert_heading_1() ),
       addAction( "insert.heading_2", e -> actions.insert_heading_2() ),
       addAction( "insert.heading_3", e -> actions.insert_heading_3() ),
       SEPARATOR,
       addAction( "insert.unordered_list", e -> actions.insert_unordered_list() ),
       addAction( "insert.ordered_list", e -> actions.insert_ordered_list() ),
       addAction( "insert.horizontal_rule", e -> actions.insert_horizontal_rule() )
     );
     // @formatter:on
+  }
   @NotNull
   private static Menu createMenuVariable(
     final GuiCommands actions, final SeparatorAction SEPARATOR ) {
     return createMenu(
       get( "Main.menu.definition" ),
       addAction( "definition.insert", e -> actions.definition_autoinsert() ),
       SEPARATOR,
       addAction( "definition.create", e -> actions.definition_create() ),
       addAction( "definition.rename", e -> actions.definition_rename() ),
       addAction( "definition.delete", e -> actions.definition_delete() )
     );
+  }
   @NotNull
   private static Menu createMenuView(
     final GuiCommands actions, final SeparatorAction SEPARATOR ) {
     return createMenu(
       get( "Main.menu.view" ),
       addAction( "view.refresh", e -> actions.view_refresh() ),
       SEPARATOR,
       addAction( "view.preview", e -> actions.view_preview() ),
       addAction( "view.outline", e -> actions.view_outline() ),
       addAction( "view.statistics", e -> actions.view_statistics() ),
       addAction( "view.files", e -> actions.view_files() ),
       SEPARATOR,
       addAction( "view.menubar", e -> actions.view_menubar() ),
       addAction( "view.toolbar", e -> actions.view_toolbar() ),
       addAction( "view.statusbar", e -> actions.view_statusbar() ),
       SEPARATOR,
       addAction( "view.log", e -> actions.view_log() )
     );
+  }
   @NotNull
   private static Menu createMenuHelp( final GuiCommands actions ) {
     return createMenu(
       get( "Main.menu.help" ),
       addAction( "help.about", e -> actions.help_about() )
     );
+  }
   public static Node createToolBar() {
     final var SEPARATOR = new SeparatorAction();
     return createToolBar(
       getAction( "file.new" ),
       getAction( "file.open" ),
       getAction( "file.save" ),
       SEPARATOR,
       getAction( "file.export.pdf" ),
       SEPARATOR,
       getAction( "edit.undo" ),
       getAction( "edit.redo" ),
       getAction( "edit.cut" ),
       getAction( "edit.copy" ),
       getAction( "edit.paste" ),
       SEPARATOR,
       getAction( "format.bold" ),
       getAction( "format.italic" ),
       getAction( "format.superscript" ),
       getAction( "format.subscript" ),
       getAction( "insert.blockquote" ),
       getAction( "insert.code" ),
       getAction( "insert.fenced_code_block" ),
       SEPARATOR,
       getAction( "insert.link" ),
       getAction( "insert.image" ),
       SEPARATOR,
       getAction( "insert.heading_1" ),
       SEPARATOR,
       getAction( "insert.unordered_list" ),
       getAction( "insert.ordered_list" )
     );
+  }
   public static StatusBar createStatusBar() {
     return new EventedStatusBar();
+  }
   /**
    * Adds a new action to the list of actions.
+   *
    * @param key     The name of the action to register in {@link #sMap}.
    * @param handler Performs the action upon request.
    * @return The newly registered action.
    */
   private static Action addAction(
     final String key, final EventHandler<ActionEvent> handler ) {
     assert key != null;
     assert handler != null;
     final var action = Action
       .builder()
       .setId( key )
       .setHandler( handler )
       .build();
     sMap.put( key, action );
     return action;
+  }
   private static Action getAction( final String key ) {
     return sMap.get( key );
+  }
   public static Menu createMenu(
     final String text, final MenuAction... actions ) {
     return new Menu( text, null, createMenuItems( actions ) );
+  }
   public static MenuItem[] createMenuItems( final MenuAction... actions ) {
     final var menuItems = new MenuItem[ actions.length ];
     for( var i = 0; i < actions.length; i++ ) {
       menuItems[ i ] = actions[ i ].createMenuItem();
+    }
     return menuItems;
+  }
   private static ToolBar createToolBar( final MenuAction... actions ) {
     return new ToolBar( createToolBarButtons( actions ) );
+  }
   private static Node[] createToolBarButtons( final MenuAction... actions ) {
     final var len = actions.length;
     final var nodes = new Node[ len ];
     for( var i = 0; i < len; i++ ) {
       nodes[ i ] = actions[ i ].createToolBarNode();
+    }
     return nodes;
+  }
+}

A src/main/java/com/keenwrite/ui/actions/GuiCommands.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.actions;
 import com.keenwrite.ExportFormat;
 import com.keenwrite.MainPane;
 import com.keenwrite.MainScene;
 import com.keenwrite.editors.TextDefinition;
 import com.keenwrite.editors.TextEditor;
 import com.keenwrite.editors.markdown.HyperlinkModel;
 import com.keenwrite.editors.markdown.LinkVisitor;
 import com.keenwrite.events.CaretMovedEvent;
 import com.keenwrite.events.ExportFailedEvent;
 import com.keenwrite.preferences.Key;
 import com.keenwrite.preferences.PreferencesController;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.processors.markdown.MarkdownProcessor;
 import com.keenwrite.search.SearchModel;
 import com.keenwrite.typesetting.Typesetter;
 import com.keenwrite.ui.controls.SearchBar;
 import com.keenwrite.ui.dialogs.ExportDialog;
 import com.keenwrite.ui.dialogs.ExportSettings;
 import com.keenwrite.ui.dialogs.ImageDialog;
 import com.keenwrite.ui.dialogs.LinkDialog;
 import com.keenwrite.ui.explorer.FilePicker;
 import com.keenwrite.ui.explorer.FilePickerFactory;
 import com.keenwrite.ui.logging.LogView;
 import com.keenwrite.util.AlphanumComparator;
 import com.keenwrite.util.RangeValidator;
 import com.vladsch.flexmark.ast.Link;
 import javafx.concurrent.Service;
 import javafx.concurrent.Task;
 import javafx.scene.control.Alert;
 import javafx.scene.control.Dialog;
 import javafx.stage.Window;
 import javafx.stage.WindowEvent;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicInteger;
 import static com.keenwrite.Bootstrap.*;
 import static com.keenwrite.ExportFormat.*;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.Constants.PDF_DEFAULT;
 import static com.keenwrite.constants.Constants.USER_DIRECTORY;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG_NODE;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preferences.AppKeys.*;
 import static com.keenwrite.processors.ProcessorFactory.createProcessors;
 import static com.keenwrite.ui.explorer.FilePickerFactory.SelectionType;
 import static com.keenwrite.ui.explorer.FilePickerFactory.SelectionType.*;
 import static com.keenwrite.util.FileWalker.walk;
 import static java.lang.System.lineSeparator;
 import static java.nio.file.Files.readString;
 import static java.nio.file.Files.writeString;
 import static javafx.application.Platform.runLater;
 import static javafx.event.Event.fireEvent;
 import static javafx.scene.control.Alert.AlertType.INFORMATION;
 import static javafx.stage.WindowEvent.WINDOW_CLOSE_REQUEST;
 import static org.apache.commons.io.FilenameUtils.getExtension;
 /**
  * Responsible for abstracting how functionality is mapped to the application.
  * This allows users to customize accelerator keys and will provide pluggable
  * functionality so that different text markup languages can change documents
  * using their respective syntax.
  */
 public final class GuiCommands {
   private static final String STYLE_SEARCH = "search";
   /**
    * Sci-fi genres, which are can be longer than other genres, typically fall
    * below 150,000 words at 6 chars per word. This reduces re-allocations of
    * memory when concatenating files together when exporting novels.
    */
   private static final int DOCUMENT_LENGTH = 150_000 * 6;
   /**
    * When an action is executed, this is one of the recipients.
    */
   private final MainPane mMainPane;
   private final MainScene mMainScene;
   private final LogView mLogView;
   /**
    * Tracks finding text in the active document.
    */
   private final SearchModel mSearchModel;
   private boolean mCanTypeset;
   /**
    * A {@link Task} can only be run once, so wrap it in a {@link Service} to
    * allow re-launching the typesetting task repeatedly.
    */
   private Service<Path> mTypesetService;
   /**
    * Prevent a race-condition between checking to see if the typesetting task
    * is running and restarting the task itself.
    */
   private final Object mMutex = new Object();
   public GuiCommands( final MainScene scene, final MainPane pane ) {
     mMainScene = scene;
     mMainPane = pane;
     mLogView = new LogView();
     mSearchModel = new SearchModel();
     mSearchModel.matchOffsetProperty().addListener( ( c, o, n ) -> {
       final var editor = getActiveTextEditor();
       // Clear highlighted areas before highlighting a new region.
       if( o != null ) {
         editor.unstylize( STYLE_SEARCH );
+      }
       if( n != null ) {
         editor.moveTo( n.getStart() );
         editor.stylize( n, STYLE_SEARCH );
+      }
     } );
     // When the active text editor changes ...
     mMainPane.textEditorProperty().addListener(
       ( c, o, n ) -> {
         // ... update the haystack.
         mSearchModel.search( getActiveTextEditor().getText() );
         // ... update the status bar with the current caret position.
         if( n != null ) {
           final var w = getWorkspace();
           final var recentDoc = w.fileProperty( KEY_UI_RECENT_DOCUMENT );
           // ... preserve the most recent document.
           recentDoc.setValue( n.getFile() );
           CaretMovedEvent.fire( n.getCaret() );
+        }
+      }
     );
+  }
   public void file_new() {
     getMainPane().newTextEditor();
+  }
   public void file_open() {
     pickFiles( FILE_OPEN_MULTIPLE ).ifPresent( l -> getMainPane().open( l ) );
+  }
   public void file_close() {
     getMainPane().close();
+  }
   public void file_close_all() {
     getMainPane().closeAll();
+  }
   public void file_save() {
     getMainPane().save();
+  }
   public void file_save_as() {
     pickFiles( FILE_SAVE_AS ).ifPresent( l -> getMainPane().saveAs( l ) );
+  }
   public void file_save_all() {
     getMainPane().saveAll();
+  }
   /**
    * Converts the actively edited file in the given file format.
+   *
    * @param format The destination file format.
    */
   private void file_export( final ExportFormat format ) {
     file_export( format, false );
+  }
   /**
    * Converts one or more files into the given file format. If {@code dir}
    * is set to true, this will first append all files in the same directory
    * as the actively edited file.
+   *
    * @param format The destination file format.
    * @param dir    Export all files in the actively edited file's directory.
    */
   private void file_export( final ExportFormat format, final boolean dir ) {
     final var editor = getMainPane().getTextEditor();
     final var exported = getWorkspace().fileProperty( KEY_UI_RECENT_EXPORT );
     final var exportParent = exported.get().toPath().getParent();
     final var editorParent = editor.getPath().getParent();
     final var userHomeParent = USER_DIRECTORY.toPath();
     final var exportPath = exportParent != null
       ? exportParent
       : editorParent != null
       ? editorParent
       : userHomeParent;
     final var filename = format.toExportFilename( editor.getPath() );
     final var selected = PDF_DEFAULT
       .getName()
       .equals( exported.get().getName() );
     final var selection = pickFile(
       selected
         ? filename
         : exported.get(),
       exportPath,
       FILE_EXPORT
     );
     selection.ifPresent( files -> file_export( editor, format, files, dir ) );
+  }
   private void file_export(
     final TextEditor editor,
     final ExportFormat format,
     final List<File> files,
     final boolean dir ) {
     editor.save();
     final var main = getMainPane();
     final var exported = getWorkspace().fileProperty( KEY_UI_RECENT_EXPORT );
     final var sourceFile = files.get( 0 );
     final var sourcePath = sourceFile.toPath();
     final var document = dir ? append( editor ) : editor.getText();
     final var context = main.createProcessorContext( sourcePath, format );
     final var service = new Service<Path>() {
       @Override
       protected Task<Path> createTask() {
         final var task = new Task<Path>() {
           @Override
           protected Path call() throws Exception {
             final var chain = createProcessors( context );
             final var export = chain.apply( document );
             // Processors can export binary files. In such cases, processors
             // return null to prevent further processing.
             return export == null ? null : writeString( sourcePath, export );
+          }
         };
         task.setOnSucceeded(
           e -> {
             // Remember the exported file name for next time.
             exported.setValue( sourceFile );
             final var result = task.getValue();
             // Binary formats must notify users of success independently.
             if( result != null ) {
               clue( "Main.status.export.success", result );
+            }
+          }
         );
         task.setOnFailed( e -> {
           final var ex = task.getException();
           clue( ex );
           if( ex instanceof TypeNotPresentException ) {
             fireExportFailedEvent();
+          }
         } );
         return task;
+      }
     };
     mTypesetService = service;
     typeset( service );
+  }
   /**
    * @param dir {@code true} means to export all files in the active file
    *            editor's directory; {@code false} means to export only the
    *            actively edited file.
    */
   private void file_export_pdf( final boolean dir ) {
     final var workspace = getWorkspace();
     final var themes = workspace.getFile(
       KEY_TYPESET_CONTEXT_THEMES_PATH
     );
     final var theme = workspace.stringProperty(
       KEY_TYPESET_CONTEXT_THEME_SELECTION
     );
     final var chapters = workspace.stringProperty(
       KEY_TYPESET_CONTEXT_CHAPTERS
     );
     final var settings = ExportSettings
       .builder()
       .with( ExportSettings.Mutator::setTheme, theme )
       .with( ExportSettings.Mutator::setChapters, chapters )
       .build();
     // Don't re-validate the typesetter installation each time. If the
     // user mucks up the typesetter installation, it'll get caught the
     // next time the application is started. Don't use |= because it
     // won't short-circuit.
     mCanTypeset = mCanTypeset || Typesetter.canRun();
     if( mCanTypeset ) {
       // If the typesetter is installed, allow the user to select a theme. If
       // the themes aren't installed, a status message will appear.
       if( ExportDialog.choose( getWindow(), themes, settings, dir ) ) {
         file_export( APPLICATION_PDF, dir );
+      }
+    }
     else {
       fireExportFailedEvent();
+    }
+  }
   public void file_export_pdf() {
     file_export_pdf( false );
+  }
   public void file_export_pdf_dir() {
     file_export_pdf( true );
+  }
   public void file_export_repeat() {
     typeset( mTypesetService );
+  }
   public void file_export_html_svg() {
     file_export( HTML_TEX_SVG );
+  }
   public void file_export_html_tex() {
     file_export( HTML_TEX_DELIMITED );
+  }
   public void file_export_xhtml_tex() {
     file_export( XHTML_TEX );
+  }
   private void fireExportFailedEvent() {
     runLater( ExportFailedEvent::fire );
+  }
   public void file_exit() {
     final var window = getWindow();
     fireEvent( window, new WindowEvent( window, WINDOW_CLOSE_REQUEST ) );
+  }
   public void edit_undo() {
     getActiveTextEditor().undo();
+  }
   public void edit_redo() {
     getActiveTextEditor().redo();
+  }
   public void edit_cut() {
     getActiveTextEditor().cut();
+  }
   public void edit_copy() {
     getActiveTextEditor().copy();
+  }
   public void edit_paste() {
     getActiveTextEditor().paste();
+  }
   public void edit_select_all() {
     getActiveTextEditor().selectAll();
+  }
   public void edit_find() {
     final var nodes = getMainScene().getStatusBar().getLeftItems();
     if( nodes.isEmpty() ) {
       final var searchBar = new SearchBar();
       searchBar.matchIndexProperty().bind( mSearchModel.matchIndexProperty() );
       searchBar.matchCountProperty().bind( mSearchModel.matchCountProperty() );
       searchBar.setOnCancelAction( event -> {
         final var editor = getActiveTextEditor();
         nodes.remove( searchBar );
         editor.unstylize( STYLE_SEARCH );
         editor.getNode().requestFocus();
       } );
       searchBar.addInputListener( ( c, o, n ) -> {
         if( n != null && !n.isEmpty() ) {
           mSearchModel.search( n, getActiveTextEditor().getText() );
+        }
       } );
       searchBar.setOnNextAction( event -> edit_find_next() );
       searchBar.setOnPrevAction( event -> edit_find_prev() );
       nodes.add( searchBar );
       searchBar.requestFocus();
+    }
     else {
       nodes.clear();
+    }
+  }
   public void edit_find_next() {
     mSearchModel.advance();
+  }
   public void edit_find_prev() {
     mSearchModel.retreat();
+  }
   public void edit_preferences() {
     try {
       new PreferencesController( getWorkspace() ).show();
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   public void format_bold() {
     getActiveTextEditor().bold();
+  }
   public void format_italic() {
     getActiveTextEditor().italic();
+  }
   public void format_monospace() {
     getActiveTextEditor().monospace();
+  }
   public void format_superscript() {
     getActiveTextEditor().superscript();
+  }
   public void format_subscript() {
     getActiveTextEditor().subscript();
+  }
   public void format_strikethrough() {
     getActiveTextEditor().strikethrough();
+  }
   public void insert_blockquote() {
     getActiveTextEditor().blockquote();
+  }
   public void insert_code() {
     getActiveTextEditor().code();
+  }
   public void insert_fenced_code_block() {
     getActiveTextEditor().fencedCodeBlock();
+  }
   public void insert_link() {
     insertObject( createLinkDialog() );
+  }
   public void insert_image() {
     insertObject( createImageDialog() );
+  }
   private void insertObject( final Dialog<String> dialog ) {
     final var textArea = getActiveTextEditor().getTextArea();
     dialog.showAndWait().ifPresent( textArea::replaceSelection );
+  }
   private Dialog<String> createLinkDialog() {
     return new LinkDialog( getWindow(), createHyperlinkModel() );
+  }
   private Dialog<String> createImageDialog() {
     final var path = getActiveTextEditor().getPath();
     final var parentDir = path.getParent();
     return new ImageDialog( getWindow(), parentDir );
+  }
   /**
    * Returns one of: selected text, word under cursor, or parsed hyperlink from
    * the Markdown AST.
+   *
    * @return An instance containing the link URL and display text.
    */
   private HyperlinkModel createHyperlinkModel() {
     final var context = getMainPane().createProcessorContext();
     final var editor = getActiveTextEditor();
     final var textArea = editor.getTextArea();
     final var selectedText = textArea.getSelectedText();
     // Convert current paragraph to Markdown nodes.
     final var mp = MarkdownProcessor.create( context );
     final var p = textArea.getCurrentParagraph();
     final var paragraph = textArea.getText( p );
     final var node = mp.toNode( paragraph );
     final var visitor = new LinkVisitor( textArea.getCaretColumn() );
     final var link = visitor.process( node );
     if( link != null ) {
       textArea.selectRange( p, link.getStartOffset(), p, link.getEndOffset() );
+    }
     return createHyperlinkModel( link, selectedText );
+  }
   private HyperlinkModel createHyperlinkModel(
     final Link link, final String selection ) {
     return link == null
       ? new HyperlinkModel( selection, "https://localhost" )
       : new HyperlinkModel( link );
+  }
   public void insert_heading_1() {
     insert_heading( 1 );
+  }
   public void insert_heading_2() {
     insert_heading( 2 );
+  }
   public void insert_heading_3() {
     insert_heading( 3 );
+  }
   private void insert_heading( final int level ) {
     getActiveTextEditor().heading( level );
+  }
   public void insert_unordered_list() {
     getActiveTextEditor().unorderedList();
+  }
   public void insert_ordered_list() {
     getActiveTextEditor().orderedList();
+  }
   public void insert_horizontal_rule() {
     getActiveTextEditor().horizontalRule();
+  }
   public void definition_create() {
     getActiveTextDefinition().createDefinition();
+  }
   public void definition_rename() {
     getActiveTextDefinition().renameDefinition();
+  }
   public void definition_delete() {
     getActiveTextDefinition().deleteDefinitions();
+  }
   public void definition_autoinsert() {
     getMainPane().autoinsert();
+  }
   public void view_refresh() {
     getMainPane().viewRefresh();
+  }
   public void view_preview() {
     getMainPane().viewPreview();
+  }
   public void view_outline() {
     getMainPane().viewOutline();
+  }
   public void view_files() { getMainPane().viewFiles(); }
   public void view_statistics() {
     getMainPane().viewStatistics();
+  }
   public void view_menubar() {
     getMainScene().toggleMenuBar();
+  }
   public void view_toolbar() {
     getMainScene().toggleToolBar();
+  }
   public void view_statusbar() {
     getMainScene().toggleStatusBar();
+  }
   public void view_log() {
     mLogView.view();
+  }
   public void help_about() {
     final var alert = new Alert( INFORMATION );
     final var prefix = "Dialog.about.";
     alert.setTitle( get( prefix + "title", APP_TITLE ) );
     alert.setHeaderText( get( prefix + "header", APP_TITLE ) );
     alert.setContentText( get( prefix + "content", APP_YEAR, APP_VERSION ) );
     alert.setGraphic( ICON_DIALOG_NODE );
     alert.initOwner( getWindow() );
     alert.showAndWait();
+  }
   private <T> void typeset( final Service<T> service ) {
     synchronized( mMutex ) {
       if( service != null && !service.isRunning() ) {
         service.reset();
         service.start();
+      }
+    }
+  }
   /**
    * Concatenates all the files in the same directory as the given file into
    * a string. The extension is determined by the given file name pattern; the
    * order files are concatenated is based on their numeric sort order (this
    * avoids lexicographic sorting).
    * <p>
    * If the parent path to the file being edited in the text editor cannot
    * be found then this will return the editor's text, without iterating through
    * the parent directory. (Should never happen, but who knows?)
    * </p>
    * <p>
    * New lines are automatically appended to separate each file.
    * </p>
+   *
    * @param editor The text editor containing
    * @return All files in the same directory as the file being edited
    * concatenated into a single string.
    */
   private String append( final TextEditor editor ) {
     final var pattern = editor.getPath();
     final var parent = pattern.getParent();
     // Short-circuit because nothing else can be done.
     if( parent == null ) {
       clue( "Main.status.export.concat.parent", pattern );
       return editor.getText();
+    }
     final var filename = pattern.getFileName().toString();
     final var extension = getExtension( filename );
     if( extension.isBlank() ) {
       clue( "Main.status.export.concat.extension", filename );
       return editor.getText();
+    }
     try {
       final var glob = "**/*." + extension;
       final var files = new ArrayList<Path>();
       final var text = new StringBuilder( DOCUMENT_LENGTH );
       final var range = getString( KEY_TYPESET_CONTEXT_CHAPTERS );
       final var validator = new RangeValidator( range );
       final var chapter = new AtomicInteger();
       walk( parent, glob, files::add );
       files.sort( new AlphanumComparator<>() );
       files.forEach( file -> {
         try {
           clue( "Main.status.export.concat", file );
           if( validator.test( chapter.incrementAndGet() ) ) {
             // Ensure multiple files are separated by an EOL.
             text.append( readString( file ) ).append( lineSeparator() );
+          }
         } catch( final IOException ex ) {
           clue( "Main.status.export.concat.io", file );
+        }
       } );
       return text.toString();
     } catch( final Throwable t ) {
       clue( t );
       return editor.getText();
+    }
+  }
   private Optional<List<File>> pickFiles( final SelectionType type ) {
     return createPicker( type ).choose();
+  }
   @SuppressWarnings( "SameParameterValue" )
   private Optional<List<File>> pickFile(
     final File file,
     final Path directory,
     final SelectionType type ) {
     final var picker = createPicker( type );
     picker.setInitialFilename( file );
     picker.setInitialDirectory( directory );
     return picker.choose();
+  }
   private FilePicker createPicker( final SelectionType type ) {
     final var factory = new FilePickerFactory( getWorkspace() );
     return factory.createModal( getWindow(), type );
+  }
   private TextEditor getActiveTextEditor() {
     return getMainPane().getTextEditor();
+  }
   private TextDefinition getActiveTextDefinition() {
     return getMainPane().getTextDefinition();
+  }
   private MainScene getMainScene() {
     return mMainScene;
+  }
   private MainPane getMainPane() {
     return mMainPane;
+  }
   private Workspace getWorkspace() {
     return mMainPane.getWorkspace();
+  }
   @SuppressWarnings( "SameParameterValue" )
   private String getString( final Key key ) {
     return getWorkspace().getString( key );
+  }
   private Window getWindow() {
     return getMainPane().getWindow();
+  }
+}

A src/main/java/com/keenwrite/ui/actions/MenuAction.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.actions;
 import javafx.scene.Node;
 import javafx.scene.control.Button;
 import javafx.scene.control.MenuItem;
 import javafx.scene.control.Separator;
 /**
  * Implementations are responsible for creating menu items and toolbar buttons.
  */
 public interface MenuAction {
   /**
    * Creates a menu item based on the {@link Action} parameters.
+   *
    * @return A new {@link MenuItem} instance.
    */
   MenuItem createMenuItem();
   /**
    * Creates an instance of {@link Button} or {@link Separator} based on the
    * {@link Action} parameters.
+   *
    * @return A new {@link Button} or {@link Separator} instance.
    */
   Node createToolBarNode();
+}

A src/main/java/com/keenwrite/ui/actions/SeparatorAction.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.actions;
 import javafx.scene.Node;
 import javafx.scene.control.*;
 /**
  * Represents a {@link MenuBar} or {@link ToolBar} action that has no
  * operation, acting as a placeholder for line separators.
  */
 public final class SeparatorAction implements MenuAction {
   @Override
   public MenuItem createMenuItem() {
     return new SeparatorMenuItem();
+  }
   @Override
   public Node createToolBarNode() {
     return new Separator();
+  }
+}

A src/main/java/com/keenwrite/ui/actions/package-info.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 /**
  * This package contains classes that define commands as executable actions.
  */
 package com.keenwrite.ui.actions;

A src/main/java/com/keenwrite/ui/adapters/DocumentAdapter.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.adapters;
 import org.xhtmlrenderer.event.DocumentListener;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Allows subclasses to implement only specific events of interest.
  */
 public class DocumentAdapter implements DocumentListener {
   @Override
   public void documentStarted() {
+  }
   @Override
   public void documentLoaded() {
+  }
   @Override
   public void onLayoutException( final Throwable t ) {
     clue( t );
+  }
   @Override
   public void onRenderException( final Throwable t ) {
     clue( t );
+  }
+}

A src/main/java/com/keenwrite/ui/adapters/ReplacedElementAdapter.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.adapters;
 import org.w3c.dom.Element;
 import org.xhtmlrenderer.extend.ReplacedElementFactory;
 import org.xhtmlrenderer.simple.extend.FormSubmissionListener;
 /**
  * Allows subclasses to implement only specific events of interest.
  */
 public abstract class ReplacedElementAdapter implements ReplacedElementFactory {
   @Override
   public void reset() {
+  }
   @Override
   public void remove( final Element e ) {
+  }
   @Override
   public void setFormSubmissionListener(
       final FormSubmissionListener listener ) {
+  }
+}

A src/main/java/com/keenwrite/ui/cells/AltTableCell.java

 package com.keenwrite.ui.cells;
 import javafx.scene.control.cell.TextFieldTableCell;
 import javafx.util.StringConverter;
 public class AltTableCell<S, T> extends TextFieldTableCell<S, T> {
   public AltTableCell( final StringConverter<T> converter ) {
     super( converter );
     assert converter != null;
     new CellEditor(
       input -> commitEdit( getConverter().fromString( input ) ),
       graphicProperty()
     );
+  }
+}

A src/main/java/com/keenwrite/ui/cells/AltTreeCell.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.cells;
 import javafx.scene.control.cell.TextFieldTreeCell;
 import javafx.util.StringConverter;
 /**
  * Responsible for enhancing the existing cell behaviour with fairly common
  * functionality, including commit on focus loss and Enter to commit.
+ *
  * @param <T> The type of data stored by the tree.
  */
 public class AltTreeCell<T> extends TextFieldTreeCell<T> {
   public AltTreeCell( final StringConverter<T> converter ) {
     super( converter );
     assert converter != null;
     new CellEditor(
       input -> commitEdit( getConverter().fromString( input ) ),
       graphicProperty()
     );
+  }
+}

A src/main/java/com/keenwrite/ui/cells/CellEditor.java

 package com.keenwrite.ui.cells;
 import javafx.beans.property.ObjectProperty;
 import javafx.beans.property.Property;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.value.ChangeListener;
 import javafx.beans.value.ObservableValue;
 import javafx.event.EventHandler;
 import javafx.scene.Node;
 import javafx.scene.control.TableCell;
 import javafx.scene.control.TextField;
 import javafx.scene.control.TreeCell;
 import javafx.scene.input.KeyEvent;
 import java.util.function.Consumer;
 import static javafx.application.Platform.runLater;
 import static javafx.scene.input.KeyCode.ENTER;
 import static javafx.scene.input.KeyCode.TAB;
 import static javafx.scene.input.KeyEvent.KEY_RELEASED;
 public class CellEditor {
   private FocusListener mFocusListener;
   private final KeyHandler mKeyHandler = new KeyHandler();
   private final Property<String> mInputText = new SimpleStringProperty();
   private final Consumer<String> mConsumer;
   /**
    * Responsible for accepting the text when users press the Enter or Tab key.
    */
   private class KeyHandler implements EventHandler<KeyEvent> {
     @Override
     public void handle( final KeyEvent event ) {
       if( event.getCode() == ENTER || event.getCode() == TAB ) {
         commitEdit();
         event.consume();
+      }
+    }
+  }
   /**
    * Responsible for committing edits when focus is lost. This will also
    * deselect the input field when focus is gained so that typing text won't
    * overwrite the entire existing text.
    */
   private class FocusListener implements ChangeListener<Boolean> {
     private final TextField mInput;
     private FocusListener( final TextField input ) {
       mInput = input;
+    }
     @Override
     public void changed(
       final ObservableValue<? extends Boolean> c,
       final Boolean endedFocus, final Boolean beganFocus ) {
       if( beganFocus ) {
         runLater( mInput::deselect );
+      }
       else if( endedFocus ) {
         commitEdit();
+      }
+    }
+  }
   /**
    * Generalized cell editor suitable for use with {@link TableCell} or
    * {@link TreeCell} instances.
+   *
    * @param consumer        Converts the field input text to the required
    *                        data type.
    * @param graphicProperty Defines the graphical user input field.
    */
   public CellEditor(
     final Consumer<String> consumer,
     final ObjectProperty<Node> graphicProperty ) {
     assert consumer != null;
     mConsumer = consumer;
     init( graphicProperty );
+  }
   private void init( final ObjectProperty<Node> graphicProperty ) {
     // When the text field is added as the graphics context, we hook into
     // the changed value to get a handle on the text field. From there it is
     // possible to add change the keyboard and focus behaviours.
     graphicProperty.addListener( ( c, o, n ) -> {
       if( o instanceof TextField ) {
         o.removeEventHandler( KEY_RELEASED, mKeyHandler );
         o.focusedProperty().removeListener( mFocusListener );
+      }
       if( n instanceof final TextField input ) {
         n.addEventFilter( KEY_RELEASED, mKeyHandler );
         mInputText.bind( input.textProperty() );
         mFocusListener = new FocusListener( input );
         n.focusedProperty().addListener( mFocusListener );
+      }
     } );
+  }
   private void commitEdit() {
     mConsumer.accept( mInputText.getValue() );
+  }
+}

A src/main/java/com/keenwrite/ui/clipboard/Clipboard.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.clipboard;
 import javafx.scene.input.ClipboardContent;
 import static javafx.scene.input.Clipboard.getSystemClipboard;
 /**
  * Responsible for pasting into the computer's clipboard.
  */
 public class Clipboard {
   /**
    * Copies the given text into the clipboard, overwriting all data.
+   *
    * @param text The text to insert into the clipboard.
    */
   public static void write( final String text ) {
     final var contents = new ClipboardContent();
     contents.putString( text );
     getSystemClipboard().setContent( contents );
+  }
   /**
    * Delegates to {@link #write(String)}.
+   *
    * @see #write(String)
    */
   public static void write( final StringBuilder text ) {
     write( text.toString() );
+  }
+}

A src/main/java/com/keenwrite/ui/controls/BrowseButton.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.controls;
 import com.keenwrite.Messages;
 import javafx.event.ActionEvent;
 import javafx.scene.control.Button;
 import javafx.stage.DirectoryChooser;
 import java.io.File;
 import java.util.function.Consumer;
 import static com.keenwrite.ui.fonts.IconFactory.createGraphic;
 import static org.controlsfx.glyphfont.FontAwesome.Glyph.FILE_ALT;
 /**
  * Responsible for browsing directories.
  */
 public class BrowseButton extends Button {
   /**
    * Initial directory.
    */
   private final File mDirectory;
   /**
    * Called when the user accepts a directory.
    */
   private final Consumer<File> mConsumer;
   public BrowseButton( final File directory, final Consumer<File> consumer ) {
     assert directory != null;
     assert consumer != null;
     mDirectory = directory;
     mConsumer = consumer;
     setGraphic( createGraphic( FILE_ALT ) );
     setOnAction( this::browse );
+  }
   public void browse( final ActionEvent ignored ) {
     final var chooser = new DirectoryChooser();
     chooser.setTitle( Messages.get( "BrowseDirectoryButton.chooser.title" ) );
     chooser.setInitialDirectory( mDirectory );
     final var result = chooser.showDialog( getScene().getWindow() );
     if( result != null ) {
       mConsumer.accept( result );
+    }
+  }
+}

A src/main/java/com/keenwrite/ui/controls/BrowseFileButton.java

 /*
  * Copyright 2015 Karl Tauber <karl at jformdesigner dot com>
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
+ *
  *  o Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
+ *
  *  o Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 package com.keenwrite.ui.controls;
 import com.keenwrite.Messages;
 import javafx.beans.property.ObjectProperty;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.event.ActionEvent;
 import javafx.scene.control.Button;
 import javafx.scene.control.Tooltip;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyEvent;
 import javafx.stage.FileChooser;
 import javafx.stage.FileChooser.ExtensionFilter;
 import java.io.File;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
 import static com.keenwrite.ui.fonts.IconFactory.createGraphic;
 import static org.controlsfx.glyphfont.FontAwesome.Glyph.FILE_ALT;
 /**
  * Button that opens a file chooser to select a local file for a URL.
  */
 public class BrowseFileButton extends Button {
   private final List<ExtensionFilter> mExtensionFilters = new ArrayList<>();
   private final ObjectProperty<Path> mBasePath = new SimpleObjectProperty<>();
   private final ObjectProperty<String> mUrl = new SimpleObjectProperty<>();
   public BrowseFileButton() {
     setGraphic( createGraphic( FILE_ALT ) );
     setTooltip( new Tooltip( Messages.get( "BrowseFileButton.tooltip" ) ) );
     setOnAction( this::browse );
     disableProperty().bind( mBasePath.isNull() );
     // workaround for a JavaFX bug:
     //   avoid closing the dialog that contains this control when the user
     //   closes the FileChooser or DirectoryChooser using the ESC key
     addEventHandler( KeyEvent.KEY_RELEASED, e -> {
       if( e.getCode() == KeyCode.ESCAPE ) {
         e.consume();
+      }
     } );
+  }
   public void addExtensionFilter( ExtensionFilter extensionFilter ) {
     mExtensionFilters.add( extensionFilter );
+  }
   public ObjectProperty<String> urlProperty() {
     return mUrl;
+  }
   private void browse( ActionEvent e ) {
     var fileChooser = new FileChooser();
     fileChooser.setTitle( Messages.get( "BrowseFileButton.chooser.title" ) );
     fileChooser.getExtensionFilters().addAll( mExtensionFilters );
     fileChooser.getExtensionFilters()
                .add( new ExtensionFilter( Messages.get(
                    "BrowseFileButton.chooser.allFilesFilter" ), "*.*" ) );
     fileChooser.setInitialDirectory( getInitialDirectory() );
     var result = fileChooser.showOpenDialog( getScene().getWindow() );
     if( result != null ) {
       updateUrl( result );
+    }
+  }
   private File getInitialDirectory() {
     //TODO build initial directory based on current value of 'url' property
     return getBasePath().toFile();
+  }
   private void updateUrl( File file ) {
     String newUrl;
     try {
       newUrl = getBasePath().relativize( file.toPath() ).toString();
     } catch( final Exception ex ) {
       newUrl = file.toString();
+    }
     mUrl.set( newUrl.replace( '\\', '/' ) );
+  }
   public void setBasePath( Path basePath ) {
     this.mBasePath.set( basePath );
+  }
   private Path getBasePath() {
     return mBasePath.get();
+  }
+}

A src/main/java/com/keenwrite/ui/controls/EscapeTextField.java

 /*
  * Copyright 2020 Karl Tauber and White Magic Software, Ltd.
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
+ *
  *  o Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
+ *
  *  o Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 package com.keenwrite.ui.controls;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 import javafx.scene.control.TextField;
 import javafx.util.StringConverter;
 /**
  * Responsible for escaping/unescaping characters for Markdown.
  */
 public class EscapeTextField extends TextField {
   public EscapeTextField() {
     escapedText.bindBidirectional(
         textProperty(),
         new StringConverter<>() {
           @Override
           public String toString( String object ) {
             return escape( object );
+          }
           @Override
           public String fromString( String string ) {
             return unescape( string );
+          }
+        }
     );
     escapeCharacters.addListener(
         e -> escapedText.set( escape( textProperty().get() ) )
     );
+  }
   // 'escapedText' property
   private final StringProperty escapedText = new SimpleStringProperty();
   public StringProperty escapedTextProperty() {
     return escapedText;
+  }
   // 'escapeCharacters' property
   private final StringProperty escapeCharacters = new SimpleStringProperty();
   public String getEscapeCharacters() {
     return escapeCharacters.get();
+  }
   public void setEscapeCharacters( String escapeCharacters ) {
     this.escapeCharacters.set( escapeCharacters );
+  }
   private String escape( final String s ) {
     final String escapeChars = getEscapeCharacters();
     return isEmpty( escapeChars ) ? s :
         s.replaceAll( "([" + escapeChars.replaceAll(
             "(.)",
             "\\\\$1" ) + "])", "\\\\$1" );
+  }
   private String unescape( final String s ) {
     final String escapeChars = getEscapeCharacters();
     return isEmpty( escapeChars ) ? s :
         s.replaceAll( "\\\\([" + escapeChars
             .replaceAll( "(.)", "\\\\$1" ) + "])", "$1" );
+  }
   private static boolean isEmpty( final String s ) {
     return s == null || s.isEmpty();
+  }
+}

A src/main/java/com/keenwrite/ui/controls/EventedStatusBar.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.controls;
 import com.keenwrite.events.StatusEvent;
 import org.controlsfx.control.StatusBar;
 import org.greenrobot.eventbus.Subscribe;
 import static com.keenwrite.events.Bus.register;
 import static javafx.application.Platform.isFxApplicationThread;
 import static javafx.application.Platform.runLater;
 /**
  * Responsible for handling application status events.
  */
 public class EventedStatusBar extends StatusBar {
   public EventedStatusBar() {
     register( this );
+  }
   /**
    * Called when an application problem is encountered. Updates the status
    * bar to show the first line of the given message. This method is
    * idempotent (if the message text is already set to the text from the
    * given message, no update is performed).
+   *
    * @param event The event containing information about the problem.
    */
   @Subscribe
   public void handle( final StatusEvent event ) {
     final var m = event.toString();
     // Don't burden the repaint thread if there's no status bar change.
     if( !getText().equals( m ) ) {
       final var i = m.indexOf( '\n' );
       final Runnable update =
         () -> setText( m.substring( 0, i > 0 ? i : m.length() ) );
       if( isFxApplicationThread() ) {
         update.run();
+      }
       else {
         runLater( update );
+      }
+    }
+  }
+}

A src/main/java/com/keenwrite/ui/controls/SearchBar.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.controls;
 import javafx.beans.property.IntegerProperty;
 import javafx.beans.property.SimpleIntegerProperty;
 import javafx.beans.value.ChangeListener;
 import javafx.event.ActionEvent;
 import javafx.event.EventHandler;
 import javafx.geometry.Pos;
 import javafx.scene.Node;
 import javafx.scene.control.*;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Region;
 import javafx.scene.layout.VBox;
 import org.controlsfx.control.textfield.CustomTextField;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.ui.fonts.IconFactory.createGraphic;
 import static java.lang.StrictMath.max;
 import static java.lang.String.format;
 import static javafx.geometry.Orientation.VERTICAL;
 import static javafx.scene.layout.Priority.ALWAYS;
 /**
  * Responsible for presenting user interface options for searching through
  * the document.
  */
 public final class SearchBar extends HBox {
   private static final String MESSAGE_KEY = "Main.search.%s.%s";
   private final Button mButtonStop = createButtonStop();
   private final Button mButtonNext = createButton( "next" );
   private final Button mButtonPrev = createButton( "prev" );
   private final TextField mFind = createTextField();
   private final Label mMatches = new Label();
   private final IntegerProperty mMatchIndex = new SimpleIntegerProperty();
   private final IntegerProperty mMatchCount = new SimpleIntegerProperty();
   public SearchBar() {
     setAlignment( Pos.CENTER );
     addAll(
       mButtonStop,
       createSpacer( 10 ),
       mFind,
       createSpacer( 10 ),
       mButtonNext,
       createSpacer( 10 ),
       mButtonPrev,
       createSpacer( 10 ),
       mMatches,
       createSpacer( 10 ),
       createSeparatorVertical(),
       createSpacer( 5 )
     );
     mMatchIndex.addListener( ( c, o, n ) -> updateMatchText() );
     mMatchCount.addListener( ( c, o, n ) -> updateMatchText() );
     updateMatchText();
+  }
   /**
    * Gives focus to the text field.
    */
   @Override
   public void requestFocus() {
     mFind.requestFocus();
+  }
   /**
    * Adds a listener that triggers when the input text field changes.
+   *
    * @param listener The listener to notify of change events.
    */
   public void addInputListener( final ChangeListener<String> listener ) {
     mFind.textProperty().addListener( listener );
+  }
   /**
    * Sets the {@link EventHandler} to call when the user interface triggers
    * finding the next matching search string. This will wrap from the end
    * to the beginning.
+   *
    * @param handler The handler requested to perform the find next action.
    */
   public void setOnNextAction( final EventHandler<ActionEvent> handler ) {
     mButtonNext.setOnAction( handler );
     mFind.setOnAction( handler );
+  }
   /**
    * Sets the {@link EventHandler} to call when the user interface triggers
    * finding the previous matching search string. This will wrap from the
    * beginning to the end.
+   *
    * @param handler The handler requested to perform the find next action.
    */
   public void setOnPrevAction( final EventHandler<ActionEvent> handler ) {
     mButtonPrev.setOnAction( handler );
+  }
   /**
    * Sets the {@link EventHandler} to call when searching has been terminated.
+   *
    * @param handler The {@link EventHandler} that will perform an action
    *                when the searching has stopped (e.g., remove from this
    *                widget from status bar).
    */
   public void setOnCancelAction( final EventHandler<ActionEvent> handler ) {
     mButtonStop.setOnAction( handler );
+  }
   /**
    * When this property value changes, the match text is updated accordingly.
    * If the value is less than zero, the text will show zero.
+   *
    * @return The index of the latest search string match.
    */
   public IntegerProperty matchIndexProperty() {
     return mMatchIndex;
+  }
   /**
    * When this property value changes, the match text is updated accordingly.
    * If the value is less than zero, the text will show zero.
+   *
    * @return The total number of items that match the search string.
    */
   public IntegerProperty matchCountProperty() {
     return mMatchCount;
+  }
   /**
    * Updates the match count.
    */
   private void updateMatchText() {
     final var index = max( 0, mMatchIndex.get() );
     final var count = max( 0, mMatchCount.get() );
     final var suffix = count == 0 ? "none" : "some";
     final var key = getMessageValue( "match", suffix );
     mMatches.setText( get( key, index, count ) );
+  }
   private Button createButton( final String id ) {
     final var button = new Button();
     final var tooltipText = getMessageValue( id, "tooltip" );
     button.setMnemonicParsing( false );
     button.setGraphic( getIcon( id ) );
     button.setTooltip( new Tooltip( tooltipText ) );
     return button;
+  }
   private Button createButtonStop() {
     final var button = createButton( "stop" );
     button.setCancelButton( true );
     return button;
+  }
   private TextField createTextField() {
     final var textField = new CustomTextField();
     textField.setLeft( getIcon( "find" ) );
     return textField;
+  }
   /**
    * Creates a vertical bar, used to divide the search results from the
    * application status message.
+   *
    * @return A vertical separator.
    */
   private Node createSeparatorVertical() {
     return new Separator( VERTICAL );
+  }
   /**
    * Breathing room between the search box and the application status message.
    * This could also be accomplished by using CSS.
+   *
    * @param width The spacer's width.
    * @return A new {@link Node} having about 10px of space.
    */
   private Node createSpacer( final int width ) {
     final var spacer = new Region();
     spacer.setPrefWidth( width );
     VBox.setVgrow( spacer, ALWAYS );
     return spacer;
+  }
   private Node getIcon( final String id ) {
     return createGraphic( getMessageValue( id, "icon" ) );
+  }
   private String getMessageValue( final String id, final String suffix ) {
     return get( format( MESSAGE_KEY, id, suffix ) );
+  }
   private void addAll( final Node... nodes ) {
     getChildren().addAll( nodes );
+  }
+}

A src/main/java/com/keenwrite/ui/dialogs/AbstractDialog.java

 /* Copyright 2017-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.dialogs;
 import com.keenwrite.service.events.impl.ButtonOrderPane;
 import javafx.scene.control.Dialog;
 import javafx.stage.Stage;
 import javafx.stage.Window;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG;
 import static com.keenwrite.Messages.get;
 import static javafx.scene.control.ButtonType.CANCEL;
 import static javafx.scene.control.ButtonType.OK;
 /**
  * Superclass that abstracts common behaviours for all dialogs.
+ *
  * @param <T> The type of dialog to create (usually String).
  */
 public abstract class AbstractDialog<T> extends Dialog<T> {
   /**
    * Ensures that all dialogs can be closed.
+   *
    * @param owner The parent window of this dialog.
    * @param title The messages title to display in the title bar.
    */
   @SuppressWarnings( "OverridableMethodCallInConstructor" )
   public AbstractDialog( final Window owner, final String title ) {
     setTitle( get( title ) );
     setResizable( true );
     initOwner( owner );
     initCloseAction();
     initDialogPane();
     initDialogButtons();
     initComponents();
     initIcon( (Stage) owner );
+  }
   /**
    * Initialize the component layout.
    */
   protected abstract void initComponents();
   /**
    * Set the dialog to use a button order pane with an OK and a CANCEL button.
    */
   protected void initDialogPane() {
     setDialogPane( new ButtonOrderPane() );
+  }
   /**
    * Set an OK and CANCEL button on the dialog.
    */
   protected void initDialogButtons() {
     getDialogPane().getButtonTypes().addAll( OK, CANCEL );
+  }
   /**
    * Attaches a close request to the dialog's [X] button so that the user
    * can always close the window, even if there's an error.
    */
   protected final void initCloseAction() {
     final var window = getDialogPane().getScene().getWindow();
     window.setOnCloseRequest( event -> window.hide() );
+  }
   private void initIcon( final Stage owner ) {
     owner.getIcons().add( ICON_DIALOG );
+  }
+}

A src/main/java/com/keenwrite/ui/dialogs/ExportDialog.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.dialogs;
 import com.keenwrite.events.ExportFailedEvent;
 import com.keenwrite.util.FileWalker;
 import com.keenwrite.util.RangeValidator;
 import com.keenwrite.util.ResourceWalker;
 import javafx.geometry.Insets;
 import javafx.scene.Node;
 import javafx.scene.control.ComboBox;
 import javafx.scene.control.Label;
 import javafx.scene.control.TextField;
 import javafx.scene.image.Image;
 import javafx.scene.input.KeyCode;
 import javafx.scene.layout.GridPane;
 import javafx.scene.text.Font;
 import javafx.stage.Stage;
 import javafx.stage.Window;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Path;
 import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Properties;
 import java.util.concurrent.atomic.AtomicReference;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.Constants.THEME_NAME_LENGTH;
 import static com.keenwrite.constants.Constants.UI_CONTROL_SPACING;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG_NODE;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.util.FileWalker.walk;
 import static java.lang.Math.max;
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.text.Normalizer.Form.NFKD;
 import static java.text.Normalizer.normalize;
 import static javafx.application.Platform.runLater;
 import static javafx.geometry.Pos.CENTER;
 import static javafx.scene.control.ButtonType.OK;
 import static org.apache.commons.lang3.StringUtils.abbreviate;
 /**
  * Provides controls for exporting to PDF, such as selecting a theme and
  * creating a subset of chapter numbers.
  */
 public final class ExportDialog extends AbstractDialog<ExportSettings> {
   private static final String UNCRITIC = "\\p{InCombiningDiacriticalMarks}+";
   private record Theme( Path path, String name ) implements Comparable<Theme> {
     /**
      * Answers whether the given theme directory name matches the theme name
      * that the user selected.
+     *
      * @param themeDir The user-selected directory to compare with the
      *                 corresponding path of this {@link Theme}.
      * @return {@code true} if the given directory matches the ending portion
      * of the {@link Path} associated with this {@link Theme} instance.
      */
     public boolean matches( final String themeDir ) {
       final var normalized = normalize( themeDir, NFKD );
       final var name = normalized.replaceAll( UNCRITIC, "" );
       final var path = path().getFileName().toString();
       return path.equalsIgnoreCase( name );
+    }
     /**
      * Returns the theme's display name.
+     *
      * @return The name of the theme presented to users.
      */
     @Override
     public String toString() {
       return abbreviate( name(), THEME_NAME_LENGTH );
+    }
     @Override
     public int compareTo( final Theme o ) {
       return name().compareTo( o.name() );
+    }
+  }
   private final File mThemes;
   private final ExportSettings mSettings;
   private GridPane mPane;
   private ComboBox<Theme> mComboBox;
   private TextField mChapters;
   private final boolean mMissingThemes;
   /**
    * Construction must use static method to allow caching themes in the
    * future, if needed.
    */
   private ExportDialog(
     final Window owner,
     final File themesDir,
     final ExportSettings settings,
     final boolean multiple
   ) {
     super( owner, get( "Dialog.typesetting.settings.title" ) );
     assert themesDir != null;
     assert settings != null;
     mThemes = themesDir;
     mSettings = settings;
     setResultConverter( button -> button == OK ? settings : null );
     final var themes = readThemes( themesDir );
     mMissingThemes = themes.isEmpty();
     // Typesetting installation has been corrupted. This is probably due
     // to the user's settings file gone missing. Rather than force users
     // to find the "themes" directory location, re-install the typesetter,
     if( mMissingThemes ) {
       clue( "Dialog.typesetting.settings.themes.missing",
             themesDir.getAbsolutePath() );
       ExportFailedEvent.fire();
       return;
+    }
     final var previousTheme = mSettings.themeProperty().get();
     initComboBox( mComboBox, previousTheme, themes );
     mPane.add( createLabel( "Dialog.typesetting.settings.theme" ), 0, 1 );
     mPane.add( mComboBox, 1, 1 );
     var title = "Dialog.typesetting.settings.header.";
     final var focusNode = new AtomicReference<Node>( mComboBox );
     if( multiple ) {
       mPane.add( createLabel( "Dialog.typesetting.settings.chapters" ), 0, 2 );
       mPane.add( mChapters, 1, 2 );
       focusNode.set( mChapters );
       title += "multiple";
+    }
     else {
       title += "single";
+    }
     // Remember the chapter range regardless of text field visibility.
     mChapters.textProperty().bindBidirectional( mSettings.chaptersProperty() );
     setHeaderText( get( title ) );
     final var dialogPane = getDialogPane();
     dialogPane.setContent( mPane );
     runLater( () -> focusNode.get().requestFocus() );
+  }
   /**
    * Prompts a user to select a theme, answering {@code false} if no theme
    * was selected. The themes must be on the native file system; using the
    * {@link FileWalker} is a little more optimal than {@link ResourceWalker}.
+   *
    * @param owner    The parent {@link Window} responsible for the dialog.
    * @param themes   Theme directory root.
    * @param settings Configuration preferences to use when exporting.
    * @param multiple Pass {@code true} to input a chapter number subset.
    * @return {@code true} if the user accepted or selected a theme.
    */
   public static boolean choose(
     final Window owner,
     final File themes,
     final ExportSettings settings,
     final boolean multiple
   ) {
     assert themes != null;
     assert settings != null;
     return new ExportDialog( owner, themes, settings, multiple ).pick();
+  }
   /**
    * @return {@code true} if the user accepted or selected a theme.
    * @see #choose(Window, File, ExportSettings, boolean)
    */
   private boolean pick() {
     try {
       if( !mMissingThemes ) {
         final var result = showAndWait();
         // The result will only be set if the OK button is pressed.
         if( result.isPresent() ) {
           final var theme = mComboBox.getSelectionModel().getSelectedItem();
           final var path = theme.path().getFileName().toString();
           mSettings.themeProperty().setValue( path );
           return true;
+        }
+      }
     } catch( final Exception ex ) {
       clue( get( "Main.status.error.theme.missing", mThemes ), ex );
+    }
     return false;
+  }
   @Override
   protected void initComponents() {
     initIcon();
     setResizable( true );
     mPane = createContentPane();
     mComboBox = createComboBox();
     mComboBox.setOnKeyPressed( event -> {
       // When the user presses the down arrow, open the drop-down. This
       // prevents navigating to the cancel button.
       if( event.getCode() == KeyCode.DOWN && !mComboBox.isShowing() ) {
         mComboBox.show();
         event.consume();
+      }
     } );
     mChapters = createNumericTextField();
+  }
   private void initIcon() {
     setGraphic( ICON_DIALOG_NODE );
     setStageGraphic( ICON_DIALOG );
+  }
   @SuppressWarnings( "SameParameterValue" )
   private void setStageGraphic( final Image icon ) {
     if( getDialogPane().getScene().getWindow() instanceof final Stage stage ) {
       stage.getIcons().add( icon );
+    }
+  }
   private void initComboBox(
     final ComboBox<Theme> comboBox,
     final String previousTheme,
     final List<Theme> choices
   ) {
     assert comboBox != null;
     assert previousTheme != null;
     assert choices != null;
     final var items = comboBox.getItems();
     items.clear();
     items.addAll( choices );
     // Set the selected item to user's settings value.
     for( final var choice : choices ) {
       if( choice.matches( previousTheme ) ) {
         comboBox.getSelectionModel().select(
           items.get( max( items.indexOf( choice ), 0 ) )
         );
         break;
+      }
+    }
+  }
   private List<Theme> readThemes( final File themesDir ) {
     try {
       // List themes in alphabetical order (human-readable by directory name).
       final var choices = new LinkedList<Theme>();
       // Populate the choices with themes detected on the system.
       walk( themesDir.toPath(), "**/theme.properties", path -> {
         try {
           final var themeName = readThemeName( path );
           final var themePath = path.getParent();
           choices.add( new Theme( themePath, themeName ) );
         } catch( final Exception ex ) {
           clue( "Main.status.error.theme.name", path );
+        }
       } );
       Collections.sort( choices );
       return choices;
     } catch( final Exception ex ) {
       clue( ex );
+    }
     return Collections.emptyList();
+  }
   private ComboBox<Theme> createComboBox() {
     return new ComboBox<>();
+  }
   private GridPane createContentPane() {
     final var grid = new GridPane();
     grid.setAlignment( CENTER );
     grid.setHgap( UI_CONTROL_SPACING );
     grid.setVgap( UI_CONTROL_SPACING );
     grid.setPadding( new Insets( 25, 25, 25, 25 ) );
     return grid;
+  }
   /**
    * Creates an input field that only accepts whole numbers. This allows users
    * to enter in chapter ranges such as: <code>1-5, 7, 9-10</code>.
+   *
    * @return A {@link TextField} that censors non-conforming characters.
    */
   private TextField createNumericTextField() {
     final var textField = new TextField();
     textField.textProperty().addListener(
       ( c, o, n ) -> textField.setText( RangeValidator.normalize( n ) )
     );
     return textField;
+  }
   private Label createLabel( final String key ) {
     final var label = new Label( get( key ) + ":" );
     final var font = label.getFont();
     final var upscale = new Font( font.getName(), 14 );
     label.setFont( upscale );
     return label;
+  }
   /**
    * Returns the theme's human-friendly name from a file conforming to
    * {@link Properties}.
+   *
    * @param file A fully qualified file name readable using {@link Properties}.
    * @return The human-friendly theme name.
    * @throws IOException          The {@link Properties} file cannot be read.
    * @throws NullPointerException The name field is not defined.
    */
   private String readThemeName( final Path file ) throws Exception {
     return read( file ).get( "name" ).toString();
+  }
   /**
    * Reads an instance of {@link Properties} from the given {@link Path} using
    * {@link StandardCharsets#UTF_8} encoding.
+   *
    * @param path The fully qualified path to the file.
    * @return The path to the file to read.
    * @throws IOException Could not open the file for reading.
    */
   private Properties read( final Path path ) throws IOException {
     final var properties = new Properties();
     try(
       final var f = new FileInputStream( path.toFile() );
       final var in = new InputStreamReader( f, UTF_8 )
     ) {
       properties.load( in );
+    }
     return properties;
+  }
+}

A src/main/java/com/keenwrite/ui/dialogs/ExportSettings.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.dialogs;
 import com.keenwrite.util.GenericBuilder;
 import javafx.beans.property.StringProperty;
 /**
  * Provides export settings such as the selected theme and chapter numbers
  * to include.
  */
 public class ExportSettings {
   private final Mutator mMutator;
   public static class Mutator {
     private StringProperty mThemeProperty;
     private StringProperty mChaptersProperty;
     public void setTheme( final StringProperty theme ) {
       assert theme != null;
       mThemeProperty = theme;
+    }
     public void setChapters( final StringProperty chapters ) {
       assert chapters != null;
       mChaptersProperty = chapters;
+    }
+  }
   /**
    * Force using the builder pattern.
    */
   private ExportSettings( final Mutator mutator ) {
     assert mutator != null;
     mMutator = mutator;
+  }
   public static GenericBuilder<Mutator, ExportSettings> builder() {
     return GenericBuilder.of(
       ExportSettings.Mutator::new, ExportSettings::new
     );
+  }
   public StringProperty themeProperty() {
     return mMutator.mThemeProperty;
+  }
   public StringProperty chaptersProperty() {
     return mMutator.mChaptersProperty;
+  }
+}

A src/main/java/com/keenwrite/ui/dialogs/ImageDialog.java

 /*
  * Copyright 2015 Karl Tauber <karl at jformdesigner dot com>
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
+ *
  *  o Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
+ *
  *  o Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 package com.keenwrite.ui.dialogs;
 import static com.keenwrite.Messages.get;
 import com.keenwrite.ui.controls.BrowseFileButton;
 import com.keenwrite.ui.controls.EscapeTextField;
 import java.nio.file.Path;
 import javafx.application.Platform;
 import javafx.beans.binding.Bindings;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 import javafx.scene.control.ButtonBar.ButtonData;
 import static javafx.scene.control.ButtonType.OK;
 import javafx.scene.control.DialogPane;
 import javafx.scene.control.Label;
 import javafx.stage.FileChooser.ExtensionFilter;
 import javafx.stage.Window;
 import org.tbee.javafx.scene.layout.fxml.MigPane;
 /**
  * Dialog to enter a Markdown image.
  */
 public class ImageDialog extends AbstractDialog<String> {
   private final StringProperty image = new SimpleStringProperty();
   public ImageDialog( final Window owner, final Path basePath ) {
     super(owner, "Dialog.image.title" );
     final DialogPane dialogPane = getDialogPane();
     dialogPane.setContent( pane );
     linkBrowseFileButton.setBasePath( basePath );
     linkBrowseFileButton.addExtensionFilter( new ExtensionFilter( get( "Dialog.image.chooser.imagesFilter" ), "*.png", "*.gif", "*.jpg" ) );
     linkBrowseFileButton.urlProperty().bindBidirectional( urlField.escapedTextProperty() );
     dialogPane.lookupButton( OK ).disableProperty().bind(
       urlField.escapedTextProperty().isEmpty()
       .or( textField.escapedTextProperty().isEmpty() ) );
     image.bind( Bindings.when( titleField.escapedTextProperty().isNotEmpty() )
       .then( Bindings.format( "![%s](%s \"%s\")", textField.escapedTextProperty(), urlField.escapedTextProperty(), titleField.escapedTextProperty() ) )
       .otherwise( Bindings.format( "![%s](%s)", textField.escapedTextProperty(), urlField.escapedTextProperty() ) ) );
     previewField.textProperty().bind( image );
     setResultConverter( dialogButton -> {
       ButtonData data = dialogButton != null ? dialogButton.getButtonData() : null;
       return data == ButtonData.OK_DONE ? image.get() : null;
     } );
     Platform.runLater( () -> {
       urlField.requestFocus();
       if( urlField.getText().startsWith( "http://" ) ) {
         urlField.selectRange( "http://".length(), urlField.getLength() );
+      }
     } );
+  }
   @Override
   protected void initComponents() {
     // JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
     pane = new MigPane();
     Label urlLabel = new Label();
     urlField = new EscapeTextField();
     linkBrowseFileButton = new BrowseFileButton();
     Label textLabel = new Label();
     textField = new EscapeTextField();
     Label titleLabel = new Label();
     titleField = new EscapeTextField();
     Label previewLabel = new Label();
     previewField = new Label();
     //======== pane ========
+    {
       pane.setCols( "[shrink 0,fill][300,grow,fill][fill]" );
       pane.setRows( "[][][][]" );
       //---- urlLabel ----
       urlLabel.setText( get( "Dialog.image.urlLabel.text" ) );
       pane.add( urlLabel, "cell 0 0" );
       //---- urlField ----
       urlField.setEscapeCharacters( "()" );
       urlField.setText( "http://yourlink.com" );
       urlField.setPromptText( "http://yourlink.com" );
       pane.add( urlField, "cell 1 0" );
       pane.add( linkBrowseFileButton, "cell 2 0" );
       //---- textLabel ----
       textLabel.setText( get( "Dialog.image.textLabel.text" ) );
       pane.add( textLabel, "cell 0 1" );
       //---- textField ----
       textField.setEscapeCharacters( "[]" );
       pane.add( textField, "cell 1 1 2 1" );
       //---- titleLabel ----
       titleLabel.setText( get( "Dialog.image.titleLabel.text" ) );
       pane.add( titleLabel, "cell 0 2" );
       pane.add( titleField, "cell 1 2 2 1" );
       //---- previewLabel ----
       previewLabel.setText( get( "Dialog.image.previewLabel.text" ) );
       pane.add( previewLabel, "cell 0 3" );
       pane.add( previewField, "cell 1 3 2 1" );
+    }
     // JFormDesigner - End of component initialization  //GEN-END:initComponents
+  }
   // JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
   private MigPane pane;
   private EscapeTextField urlField;
   private BrowseFileButton linkBrowseFileButton;
   private EscapeTextField textField;
   private EscapeTextField titleField;
   private Label previewField;
 	// JFormDesigner - End of variables declaration  //GEN-END:variables
+}

A src/main/java/com/keenwrite/ui/dialogs/ImageDialog.jfd

 JFDML JFormDesigner: "9.9.9.9.9999" Java: "1.8.0_66" encoding: "UTF-8"
 new FormModel {
 	"i18n.bundlePackage": "com.scrivendor"
 	"i18n.bundleName": "messages"
 	"i18n.autoExternalize": true
 	"i18n.keyPrefix": "ImageDialog"
 	contentType: "form/javafx"
 	root: new FormRoot {
 		add( new FormContainer( "org.tbee.javafx.scene.layout.fxml.MigPane", new FormLayoutManager( class org.tbee.javafx.scene.layout.fxml.MigPane ) {
 			"$layoutConstraints": ""
 			"$columnConstraints": "[shrink 0,fill][300,grow,fill][fill]"
 			"$rowConstraints": "[][][][]"
 		} ) {
 			name: "pane"
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "urlLabel"
 				"text": new FormMessage( null, "ImageDialog.urlLabel.text" )
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": true
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 0"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.EscapeTextField" ) {
 				name: "urlField"
 				"escapeCharacters": "()"
 				"text": "http://yourlink.com"
 				"promptText": "http://yourlink.com"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 0"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.BrowseFileButton" ) {
 				name: "linkBrowseFileButton"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 2 0"
 			} )
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "textLabel"
 				"text": new FormMessage( null, "ImageDialog.textLabel.text" )
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": true
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 1"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.EscapeTextField" ) {
 				name: "textField"
 				"escapeCharacters": "[]"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 1 2 1"
 			} )
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "titleLabel"
 				"text": new FormMessage( null, "ImageDialog.titleLabel.text" )
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": true
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 2"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.EscapeTextField" ) {
 				name: "titleField"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 2 2 1"
 			} )
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "previewLabel"
 				"text": new FormMessage( null, "ImageDialog.previewLabel.text" )
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": true
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 3"
 			} )
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "previewField"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 3 2 1"
 			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new javafx.geometry.Point2D( 0.0, 0.0 )
 			"size": new javafx.geometry.Dimension2D( 500.0, 300.0 )
 		} )
+	}
+}

A src/main/java/com/keenwrite/ui/dialogs/LinkDialog.java

 /*
  * Copyright 2016 Karl Tauber and White Magic Software, Ltd.
+ *
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
+ *
  *  o Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
+ *
  *  o Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 package com.keenwrite.ui.dialogs;
 import com.keenwrite.ui.controls.EscapeTextField;
 import com.keenwrite.editors.markdown.HyperlinkModel;
 import javafx.application.Platform;
 import javafx.beans.binding.Bindings;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 import javafx.scene.control.ButtonBar.ButtonData;
 import javafx.scene.control.DialogPane;
 import javafx.scene.control.Label;
 import javafx.stage.Window;
 import org.tbee.javafx.scene.layout.fxml.MigPane;
 import static com.keenwrite.Messages.get;
 import static javafx.scene.control.ButtonType.OK;
 /**
  * Dialog to enter a Markdown link.
  */
 public class LinkDialog extends AbstractDialog<String> {
   private final StringProperty link = new SimpleStringProperty();
   public LinkDialog(
     final Window owner, final HyperlinkModel hyperlink ) {
     super( owner, "Dialog.link.title" );
     final DialogPane dialogPane = getDialogPane();
     dialogPane.setContent( pane );
     dialogPane.lookupButton( OK ).disableProperty().bind(
       urlField.escapedTextProperty().isEmpty() );
     textField.setText( hyperlink.getText() );
     urlField.setText( hyperlink.getUrl() );
     titleField.setText( hyperlink.getTitle() );
     link.bind( Bindings.when( titleField.escapedTextProperty().isNotEmpty() )
       .then( Bindings.format( "[%s](%s \"%s\")", textField.escapedTextProperty(), urlField.escapedTextProperty(), titleField.escapedTextProperty() ) )
       .otherwise( Bindings.when( textField.escapedTextProperty().isNotEmpty() )
         .then( Bindings.format( "[%s](%s)", textField.escapedTextProperty(), urlField.escapedTextProperty() ) )
         .otherwise( urlField.escapedTextProperty() ) ) );
     setResultConverter( dialogButton -> {
       ButtonData data = dialogButton != null ? dialogButton.getButtonData() : null;
       return data == ButtonData.OK_DONE ? link.get() : null;
     } );
     Platform.runLater( () -> {
       urlField.requestFocus();
       urlField.selectRange( 0, urlField.getLength() );
     } );
+  }
   @Override
   protected void initComponents() {
     // JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
     pane = new MigPane();
     Label urlLabel = new Label();
     urlField = new EscapeTextField();
     Label textLabel = new Label();
     textField = new EscapeTextField();
     Label titleLabel = new Label();
     titleField = new EscapeTextField();
     //======== pane ========
+    {
       pane.setCols( "[shrink 0,fill][300,grow,fill][fill][fill]" );
       pane.setRows( "[][][][]" );
       //---- urlLabel ----
       urlLabel.setText( get( "Dialog.link.urlLabel.text" ) );
       pane.add( urlLabel, "cell 0 0" );
       //---- urlField ----
       urlField.setEscapeCharacters( "()" );
       pane.add( urlField, "cell 1 0" );
       //---- textLabel ----
       textLabel.setText( get( "Dialog.link.textLabel.text" ) );
       pane.add( textLabel, "cell 0 1" );
       //---- textField ----
       textField.setEscapeCharacters( "[]" );
       pane.add( textField, "cell 1 1 3 1" );
       //---- titleLabel ----
       titleLabel.setText( get( "Dialog.link.titleLabel.text" ) );
       pane.add( titleLabel, "cell 0 2" );
       pane.add( titleField, "cell 1 2 3 1" );
+    }
     // JFormDesigner - End of component initialization  //GEN-END:initComponents
+  }
   // JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
   private MigPane pane;
   private EscapeTextField urlField;
   private EscapeTextField textField;
   private EscapeTextField titleField;
   // JFormDesigner - End of variables declaration  //GEN-END:variables
+}

A src/main/java/com/keenwrite/ui/dialogs/LinkDialog.jfd

 JFDML JFormDesigner: "9.9.9.9.9999" Java: "1.8.0_66" encoding: "UTF-8"
 new FormModel {
 	"i18n.bundlePackage": "com.scrivendor"
 	"i18n.bundleName": "messages"
 	"i18n.autoExternalize": true
 	"i18n.keyPrefix": "LinkDialog"
 	contentType: "form/javafx"
 	root: new FormRoot {
 		add( new FormContainer( "org.tbee.javafx.scene.layout.fxml.MigPane", new FormLayoutManager( class org.tbee.javafx.scene.layout.fxml.MigPane ) {
 			"$layoutConstraints": ""
 			"$columnConstraints": "[shrink 0,fill][300,grow,fill][fill][fill]"
 			"$rowConstraints": "[][][][]"
 		} ) {
 			name: "pane"
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "urlLabel"
 				"text": new FormMessage( null, "LinkDialog.urlLabel.text" )
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": true
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 0"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.EscapeTextField" ) {
 				name: "urlField"
 				"escapeCharacters": "()"
 				"text": "http://yourlink.com"
 				"promptText": "http://yourlink.com"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 0"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.BrowseDirectoryButton" ) {
 				name: "linkBrowseDirectoyButton"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 2 0"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.BrowseFileButton" ) {
 				name: "linkBrowseFileButton"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 3 0"
 			} )
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "textLabel"
 				"text": new FormMessage( null, "LinkDialog.textLabel.text" )
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": true
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 1"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.EscapeTextField" ) {
 				name: "textField"
 				"escapeCharacters": "[]"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 1 3 1"
 			} )
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "titleLabel"
 				"text": new FormMessage( null, "LinkDialog.titleLabel.text" )
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": true
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 2"
 			} )
 			add( new FormComponent( "com.scrivendor.controls.EscapeTextField" ) {
 				name: "titleField"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 2 3 1"
 			} )
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "previewLabel"
 				"text": new FormMessage( null, "LinkDialog.previewLabel.text" )
 				auxiliary() {
 					"JavaCodeGenerator.variableLocal": true
+				}
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 3"
 			} )
 			add( new FormComponent( "javafx.scene.control.Label" ) {
 				name: "previewField"
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 3 3 1"
 			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new javafx.geometry.Point2D( 0.0, 0.0 )
 			"size": new javafx.geometry.Dimension2D( 500.0, 300.0 )
 		} )
+	}
+}

A src/main/java/com/keenwrite/ui/explorer/FilePicker.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.explorer;
 import java.io.File;
 import java.nio.file.Path;
 import java.util.List;
 import java.util.Optional;
 /**
  * Responsible for providing the user with a way to select a file.
  */
 public interface FilePicker {
   /**
    * Establishes the default file name to use when the UI is displayed. The
    * path portion of the file, if any, is ignored.
+   *
    * @param file The initial {@link File} to choose when prompting the user
    *             to select a file.
    */
   void setInitialFilename( File file );
   /**
    * Establishes the directory to browse when the UI is displayed.
+   *
    * @param path The initial {@link Path} to use when navigating the system.
    */
   default void setInitialDirectory( Path path ) {}
   /**
    * Sets the list of file names to display. For example, a single call to
    * this method with values of ("**.pdf", "Portable Document Format (PDF)")
    * would display only a file listing of PDF files.
+   *
    * @param glob Pattern that allows matching file names to be listed.
    * @param text Human-readable description of the pattern.
    */
   default void addIncludeFileFilter( String glob, String text ) {}
   /**
    * Sets the list of file names to suppress. For example, a single call to
    * this method with values of (".*") would prevent listing files that begin
    * with a period.
+   *
    * @param glob Pattern that allows matching file names to be suppressed.
    */
   default void addExcludeFileFilter( String glob ) {}
   /**
    * Returns the list of {@link File} objects selected by the user.
+   *
    * @return A list of {@link File} objects, empty when nothing was selected.
    */
   Optional<List<File>> choose();
+}

A src/main/java/com/keenwrite/ui/explorer/FilePickerFactory.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.explorer;
 import com.keenwrite.Messages;
 import com.keenwrite.preferences.Workspace;
 import javafx.beans.property.ObjectProperty;
 import javafx.scene.Node;
 import javafx.stage.FileChooser;
 import javafx.stage.Window;
 import java.io.File;
 import java.nio.file.Path;
 import java.util.List;
 import java.util.Locale;
 import java.util.Optional;
 import static com.keenwrite.preferences.AppKeys.KEY_UI_RECENT_DIR;
 import static com.keenwrite.ui.explorer.FilePickerFactory.SelectionType.*;
 import static java.lang.String.format;
 /**
  * Shim for a {@link FilePicker} instance that is implemented in pure Java.
  * This particular picker is added to avoid using the bug-ridden JavaFX
  * {@link FileChooser} that invokes the native file chooser.
  */
 public class FilePickerFactory {
   public enum SelectionType {
     DIRECTORY_OPEN( "open" ),
     FILE_IMPORT( "import" ),
     FILE_EXPORT( "export" ),
     FILE_OPEN_SINGLE( "open" ),
     FILE_OPEN_MULTIPLE( "open" ),
     FILE_OPEN_NEW( "open" ),
     FILE_SAVE_AS( "save" );
     private final String mTitle;
     SelectionType( final String title ) {
       assert title != null;
       mTitle = Messages.get( format( "Dialog.file.choose.%s.title", title ) );
+    }
     public String getTitle() {
       return mTitle;
+    }
+  }
   private final ObjectProperty<File> mDirectory;
   private final Locale mLocale;
   public FilePickerFactory( final Workspace workspace ) {
     mDirectory = workspace.fileProperty( KEY_UI_RECENT_DIR );
     mLocale = workspace.getLocale();
+  }
   public FilePicker createModal(
     final Window owner, final SelectionType options ) {
     final var picker = new NativeFilePicker( owner, options );
     picker.setInitialDirectory( mDirectory.get().toPath() );
     return picker;
+  }
   public Node createModeless() {
     return new FilesView( mDirectory, mLocale );
+  }
   /**
    * Operating system's file selection dialog.
    */
   private static final class NativeFilePicker implements FilePicker {
     private final FileChooser mChooser = new FileChooser();
     private final Window mOwner;
     private final SelectionType mType;
     public NativeFilePicker( final Window owner, final SelectionType type ) {
       assert owner != null;
       assert type != null;
       mOwner = owner;
       mType = type;
+    }
     @Override
     public void setInitialFilename( final File file ) {
       assert file != null;
       mChooser.setInitialFileName( file.getName() );
+    }
     @Override
     public void setInitialDirectory( final Path path ) {
       assert path != null;
       final var file = path.toFile();
       mChooser.setInitialDirectory(
         file.exists() ? file : new File( System.getProperty( "user.home" ) )
       );
+    }
     @Override
     public Optional<List<File>> choose() {
       if( mType == FILE_OPEN_MULTIPLE ) {
         return Optional.ofNullable( mChooser.showOpenMultipleDialog( mOwner ) );
+      }
       final File file = mType == FILE_EXPORT || mType == FILE_SAVE_AS
         ? mChooser.showSaveDialog( mOwner )
         : mChooser.showOpenDialog( mOwner );
       return file == null ? Optional.empty() : Optional.of( List.of( file ) );
+    }
+  }
+}

A src/main/java/com/keenwrite/ui/explorer/FilesView.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.explorer;
 import com.keenwrite.events.FileOpenEvent;
 import com.keenwrite.ui.controls.BrowseButton;
 import javafx.beans.property.*;
 import javafx.collections.ObservableList;
 import javafx.collections.transformation.SortedList;
 import javafx.scene.control.*;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.HBox;
 import javafx.stage.FileChooser;
 import javafx.util.Callback;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.time.Instant;
 import java.time.format.DateTimeFormatter;
 import java.util.List;
 import java.util.Locale;
 import java.util.Objects;
 import java.util.Optional;
 import static com.keenwrite.constants.Constants.UI_CONTROL_SPACING;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.ui.fonts.IconFactory.createFileIcon;
 import static java.nio.file.Files.size;
 import static java.time.Instant.ofEpochMilli;
 import static java.time.ZoneId.systemDefault;
 import static java.time.format.DateTimeFormatter.ofPattern;
 import static java.util.Comparator.comparing;
 import static javafx.collections.FXCollections.observableArrayList;
 import static javafx.scene.control.TableView.CONSTRAINED_RESIZE_POLICY;
 import static javafx.scene.input.KeyCode.ENTER;
 import static javafx.scene.layout.Priority.ALWAYS;
 import static org.apache.commons.io.FilenameUtils.getExtension;
 /**
  * Responsible for browsing files.
  */
 public class FilesView extends BorderPane implements FilePicker {
   /**
    * When this directory changes, the input field will update accordingly.
    */
   private final ObjectProperty<File> mDirectory;
   /**
    * Data model for the file list shown in tabular format.
    */
   private final ObservableList<PathEntry> mItems = observableArrayList();
   /**
    * Used to format a file's date string from a {@code long} value.
    */
   private final DateTimeFormatter mDateFormatter;
   /**
    * Used to format a file's time string from a {@code long} value.
    */
   private final DateTimeFormatter mTimeFormatter;
   /**
    * Constructs a new view of a directory, listing all the files contained
    * therein. This will update the recent directory so that it will be
    * restored upon restart.
+   *
    * @param recent Contains the initial (recent) directory.
    * @param locale Contains the language settings.
    */
   public FilesView(
     final ObjectProperty<File> recent, final Locale locale ) {
     mDirectory = recent;
     mDateFormatter = createFormatter( "yyyy-MMM-dd", locale );
     mTimeFormatter = createFormatter( "HH:mm:ss", locale );
     final var browse = createDirectoryChooser();
     final var table = createFileTable();
     final var sortedItems = new SortedList<>( mItems );
     sortedItems.comparatorProperty().bind( table.comparatorProperty() );
     table.setItems( sortedItems );
     setTop( browse );
     setCenter( table );
     mDirectory.addListener( ( c, o, n ) -> updateListing( n ) );
     updateListing( mDirectory.get() );
+  }
   @Override
   public void setInitialFilename( final File file ) {
+  }
   @Override
   public Optional<List<File>> choose() {
     return Optional.empty();
+  }
   private void updateListing( final File directory ) {
     if( directory != null ) {
       mItems.clear();
       try {
         if( directory.getParent() != null ) {
           // Allow traversal to parent-directory.
           mItems.add( pathEntry( Paths.get( ".." ) ) );
+        }
         for( final var f : Objects.requireNonNull( directory.list() ) ) {
           if( !f.startsWith( "." ) ) {
             mItems.add( pathEntry( Paths.get( directory.toString(), f ) ) );
+          }
+        }
       } catch( final Exception ex ) {
         clue( ex );
+      }
+    }
+  }
   /**
    * Allows the user to use an instance of {@link FileChooser} to change the
    * directory.
+   *
    * @return The browse button and input field.
    */
   private HBox createDirectoryChooser() {
     final var dirProperty = directoryProperty();
     final var directory = dirProperty.get();
     final var hbox = new HBox();
     final var field = new TextField();
     mDirectory.addListener( ( c, o, n ) -> {
       if( n != null ) {field.setText( n.getAbsolutePath() );}
     } );
     field.setOnKeyPressed( event -> {
       if( event.getCode() == ENTER ) {
         mDirectory.set( new File( field.getText() ) );
+      }
     } );
     final var button = new BrowseButton( directory, mDirectory::set );
     hbox.getChildren().add( button );
     hbox.getChildren().add( field );
     hbox.setSpacing( UI_CONTROL_SPACING );
     HBox.setHgrow( field, ALWAYS );
     return hbox;
+  }
   @SuppressWarnings( "unchecked" )
   private TableView<FilesView.PathEntry> createFileTable() {
     final var style = "-fx-alignment: BASELINE_LEFT;";
     final var table = new TableView<FilesView.PathEntry>();
     table.setColumnResizePolicy( CONSTRAINED_RESIZE_POLICY );
     table.setRowFactory( tv -> {
       final var row = new TableRow<PathEntry>();
       row.setOnMouseClicked( event -> {
         if( event.getClickCount() == 2 && !row.isEmpty() ) {
           final var entry = row.getItem();
           final var dir = mDirectory.get();
           final var filename = entry.nameProperty().get();
           final var path = Path.of( dir.toString(), filename );
           final var file = path.toFile();
           if( file.isFile() ) {
             FileOpenEvent.fire( path.toUri() );
+          }
           else if( file.isDirectory() ) {
             mDirectory.set( path.normalize().toFile() );
+          }
+        }
       } );
       return row;
     } );
     final TableColumn<PathEntry, Path> colType = createColumn( "Type" );
     final TableColumn<PathEntry, String> colName = createColumn( "Name" );
     final TableColumn<PathEntry, Number> colSize = createColumn( "Size" );
     final TableColumn<PathEntry, String> colDate = createColumn( "Date" );
     final TableColumn<PathEntry, String> colTime = createColumn( "Modified" );
     colType.setCellFactory( new FileCell<>() );
     colType.setCellValueFactory( stat -> stat.getValue().typeProperty() );
     colName.setCellValueFactory( stat -> stat.getValue().nameProperty() );
     colSize.setCellValueFactory( stat -> stat.getValue().sizeProperty() );
     colDate.setCellValueFactory( stat -> stat.getValue().dateProperty() );
     colTime.setCellValueFactory( stat -> stat.getValue().timeProperty() );
     colType.setStyle( style );
     colName.setStyle( style );
     colSize.setStyle( style );
     colDate.setStyle( style );
     colTime.setStyle( style );
     final var columns = table.getColumns();
     columns.add( colType );
     columns.add( colName );
     columns.add( colSize );
     columns.add( colDate );
     columns.add( colTime );
     table.getSortOrder().setAll( colName, colDate, colTime );
     colType.setComparator(
       comparing( p -> getExtension( p.getFileName().toString() ) )
     );
     return table;
+  }
   public ObjectProperty<File> directoryProperty() {
     return mDirectory;
+  }
   private static DateTimeFormatter createFormatter(
     final String format, final Locale locale ) {
     return ofPattern( format, locale ).withZone( systemDefault() );
+  }
   public PathEntry pathEntry( final Path path ) throws IOException {
     return new PathEntry( path );
+  }
   /**
    * Responsible for rendering file system objects as image icons.
+   *
    * @param <T> The data model type associated with a fully qualified path.
    * @param <P> Simplifies swapping {@link Path} for {@link File}.
    */
   private static class FileCell<T, P extends Path> extends TableCell<T, P>
     implements Callback<TableColumn<T, P>, TableCell<T, P>> {
     @Override
     public TableCell<T, P> call( final TableColumn<T, P> param ) {
       return new TableCell<>() {
         @Override
         protected void updateItem( final P path, final boolean empty ) {
           super.updateItem( path, empty );
           setText( null );
           try {
             setGraphic( empty || path == null ? null : createFileIcon( path ) );
           } catch( final Exception ex ) {
             clue( ex );
+          }
+        }
       };
+    }
+  }
   protected final class PathEntry {
     private final ObjectProperty<Path> mType;
     private final StringProperty mName;
     private final LongProperty mSize;
     private final StringProperty mDate;
     private final StringProperty mTime;
     private PathEntry( final Path path ) throws IOException {
       this(
         path,
         path.getFileName().toString(),
         size( path ),
         ofEpochMilli( path.toFile().lastModified() )
       );
+    }
     public PathEntry(
       final Path type,
       final String name,
       final long size,
       final Instant modified ) {
       this(
         new SimpleObjectProperty<>( type ),
         new SimpleStringProperty( name ),
         new SimpleLongProperty( size ),
         new SimpleStringProperty( mDateFormatter.format( modified ) ),
         new SimpleStringProperty( mTimeFormatter.format( modified ) )
       );
+    }
     private PathEntry(
       final ObjectProperty<Path> type,
       final StringProperty name,
       final LongProperty size,
       final StringProperty date,
       final StringProperty time ) {
       mType = type;
       mName = name;
       mSize = size;
       mDate = date;
       mTime = time;
+    }
     private ObjectProperty<Path> typeProperty() {
       return mType;
+    }
     private StringProperty nameProperty() {
       return mName;
+    }
     private LongProperty sizeProperty() {
       return mSize;
+    }
     private StringProperty dateProperty() {
       return mDate;
+    }
     private StringProperty timeProperty() {
       return mTime;
+    }
+  }
   private <E, T> TableColumn<E, T> createColumn( final String key ) {
     return new TableColumn<>( key );
+  }
+}

A src/main/java/com/keenwrite/ui/fonts/IconFactory.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.fonts;
 import com.keenwrite.io.MediaType;
 import com.keenwrite.io.MediaTypeExtension;
 import javafx.scene.Node;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 import org.controlsfx.glyphfont.FontAwesome;
 import org.controlsfx.glyphfont.Glyph;
 import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Path;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.HashMap;
 import java.util.Map;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.io.MediaTypeExtension.MEDIA_UNDEFINED;
 import static com.keenwrite.preview.SvgRasterizer.BROKEN_IMAGE_PLACEHOLDER;
 import static com.keenwrite.preview.SvgRasterizer.rasterize;
 import static java.awt.Font.*;
 import static java.nio.file.Files.readAttributes;
 import static javafx.embed.swing.SwingFXUtils.toFXImage;
 import static org.apache.commons.io.FilenameUtils.getExtension;
 import static org.controlsfx.glyphfont.FontAwesome.Glyph.valueOf;
 /**
  * Responsible for creating FontAwesome glyphs and graphics.
  */
 public class IconFactory {
   /**
    * File icon height, in pixels.
    */
   private static final int ICON_HEIGHT = 16;
   /**
    * Singleton to prevent re-loading the TTF file.
    */
   private static final FontAwesome FONT_AWESOME = new FontAwesome();
   /**
    * Caches file type icons encountered.
    */
   private static final Map<String, Image> ICONS = new HashMap<>();
   /**
    * Create a {@link Node} representation for the given icon name.
+   *
    * @param icon Name of icon to convert to a UI object (case-insensitive).
    * @return A UI object suitable for display.
    */
   public static Node createGraphic( final String icon ) {
     assert icon != null;
     // Return a label glyph.
     return icon.isEmpty()
       ? new Glyph()
       : createGlyph( icon );
+  }
   /**
    * Create a {@link Node} representation for the given FontAwesome glyph.
+   *
    * @param glyph The glyph to convert to a {@link Node}.
    * @return The given glyph as a text label.
    */
   public static Node createGraphic( final FontAwesome.Glyph glyph ) {
     return FONT_AWESOME.create( glyph );
+  }
   /**
    * Creates a suitable {@link Node} icon representation for the given file.
    * This will first look up the {@link MediaType} before matching based on
    * the file name extension.
+   *
    * @param path The file to represent graphically.
    * @return An icon representation for the given file.
    */
   public static ImageView createFileIcon( final Path path ) throws IOException {
     final var attrs = readAttributes( path, BasicFileAttributes.class );
     final var filename = path.getFileName().toString();
     String extension;
     if( "..".equals( filename ) ) {
       extension = "folder-up";
+    }
     else if( attrs.isDirectory() ) {
       extension = "folder";
+    }
     else if( attrs.isSymbolicLink() ) {
       extension = "folder-link";
+    }
     else {
       final var mediaType = MediaType.valueFrom( path );
       final var mte = MediaTypeExtension.valueFrom( mediaType );
       // if the file extension is not known to the app, try loading an icon
       // that corresponds to the extension directly.
       extension = mte == MEDIA_UNDEFINED
         ? getExtension( filename )
         : mte.getExtension();
+    }
     if( extension == null ) {
       extension = "";
+    }
     else {
       extension = extension.toLowerCase();
+    }
     // Each cell in the table must have a distinct parent, so the image views
     // cannot be reused. The underlying buffered image can be cached, though.
     final var image =
       ICONS.computeIfAbsent( extension, IconFactory::createFxImage );
     final var imageView = new ImageView();
     imageView.setPreserveRatio( true );
     imageView.setFitHeight( ICON_HEIGHT );
     imageView.setImage( image );
     return imageView;
+  }
   private static Image createFxImage( final String extension ) {
     return toFXImage( createImage( extension ), null );
+  }
   private static BufferedImage createImage( final String extension ) {
     try( final var icon = open( "icons/" + extension + ".svg" ) ) {
       if( icon == null ) {
         throw new IllegalArgumentException( extension );
+      }
       return rasterize( icon );
     } catch( final Exception ex ) {
       clue( ex );
       // If the extension was unknown, fall back to a blank icon, falling
       // back again to a broken image if blank cannot be found (to avoid
       // infinite recursion).
       return "blank".equals( extension )
         ? BROKEN_IMAGE_PLACEHOLDER
         : createImage( "blank" );
+    }
+  }
   private static InputStream open( final String resource ) {
     return IconFactory.class.getResourceAsStream( resource );
+  }
   /**
    * Returns the font to use when adding icons to the UI.
+   *
    * @param size The font size to use when drawing the icon.
    * @return A font containing numerous icons.
    */
   public static Font getIconFont( final int size ) {
     try( final var fontStream = openFont() ) {
       final var font = createFont( TRUETYPE_FONT, fontStream );
       return font.deriveFont( PLAIN, size );
     } catch( final Exception e ) {
       // This doesn't actually work, seemingly after an upgrade to ControlsFX.
       // As such, creating the font and deriving it will work.
       return new Font( FONT_AWESOME.getName(), PLAIN, size );
+    }
+  }
   /**
    * This re-reads the {@link FontAwesome} font TTF resource. For a reason
    * not yet investigated, the font doesn't appear to be accessible to the
    * application. This may have happened during an upgrade to ControlsFX.
    * Callers are responsible for closing the stream.
+   *
    * @return A stream containing font TrueType glyph information.
    */
   private static InputStream openFont() {
     return FontAwesome.class.getResourceAsStream( "fontawesome-webfont.ttf" );
+  }
   private static Node createGlyph( final String icon ) {
     return createGraphic( valueOf( icon.toUpperCase() ) );
+  }
   /**
    * Prevent instantiation. Use the {@link #createGraphic(String)} method to
    * create an icon for display.
    */
   private IconFactory() {}
+}

A src/main/java/com/keenwrite/ui/heuristics/DocumentStatistics.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.heuristics;
 import com.keenwrite.events.DocumentChangedEvent;
 import com.keenwrite.events.WordCountEvent;
 import com.keenwrite.preferences.Workspace;
 import com.whitemagicsoftware.wordcount.TokenizerException;
 import javafx.beans.property.IntegerProperty;
 import javafx.beans.property.SimpleIntegerProperty;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 import javafx.collections.ObservableList;
 import javafx.collections.transformation.SortedList;
 import javafx.scene.control.TableColumn;
 import javafx.scene.control.TableView;
 import org.greenrobot.eventbus.Subscribe;
 import static com.keenwrite.events.Bus.register;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.preferences.AppKeys.KEY_LANGUAGE_LOCALE;
 import static com.keenwrite.preferences.AppKeys.KEY_UI_FONT_EDITOR_NAME;
 import static com.keenwrite.ui.heuristics.DocumentStatistics.StatEntry;
 import static java.lang.String.format;
 import static javafx.application.Platform.runLater;
 import static javafx.collections.FXCollections.observableArrayList;
 /**
  * Responsible for displaying document statistics, such as word count and
  * word frequency.
  */
 public final class DocumentStatistics extends TableView<StatEntry> {
   private WordCounter mWordCounter;
   private final ObservableList<StatEntry> mItems = observableArrayList();
   /**
    * Creates a new observer of document change events that will gather and
    * display document statistics (e.g., word counts).
+   *
    * @param workspace Settings used to configure the statistics engine.
    */
   public DocumentStatistics( final Workspace workspace ) {
     mWordCounter = WordCounter.create( workspace.getLocale() );
     final var sortedItems = new SortedList<>( mItems );
     sortedItems.comparatorProperty().bind( comparatorProperty() );
     setItems( sortedItems );
     initView();
     initListeners( workspace );
     register( this );
     final var fontName = workspace.stringProperty( KEY_UI_FONT_EDITOR_NAME );
     fontName.addListener(
       ( c, o, n ) -> {
         if( n != null ) {
           setFontFamily( n );
+        }
+      }
     );
     setFontFamily( fontName.getValue() );
+  }
   /**
    * Called when the hash code for the current document changes. This happens
    * when non-collapsable-whitespace is added to the document. When the
    * document is sent for rendering, the parsed document is converted to text.
    * If that text differs in its hash code, then this method is called. The
    * implication is that all variables and executable statements have been
    * replaced. An event bus subscriber is used so that text processing occurs
    * outside the UI processing threads.
+   *
    * @param event Container for the document text that has changed.
    */
   @Subscribe
   public void handle( final DocumentChangedEvent event ) {
     try {
       runLater( () -> {
         mItems.clear();
         final var document = event.getDocument();
         final var wordCount = mWordCounter.count(
           document, ( k, count ) -> {
             // Generate statistics for words that occur thrice or more.
             if( count > 2 ) {
               mItems.add( new StatEntry( k, count ) );
+            }
+          }
         );
         WordCountEvent.fire( wordCount );
       } );
     } catch( final TokenizerException ex ) {
       clue( ex );
+    }
+  }
   @SuppressWarnings( "unchecked" )
   private void initView() {
     final TableColumn<StatEntry, String> colWord = createColumn( "Word" );
     final TableColumn<StatEntry, Number> colCount = createColumn( "Count" );
     colWord.setCellValueFactory( stat -> stat.getValue().wordProperty() );
     colCount.setCellValueFactory( stat -> stat.getValue().tallyProperty() );
     colCount.setComparator( colCount.getComparator().reversed() );
     final var columns = getColumns();
     columns.add( colWord );
     columns.add( colCount );
     setMaxWidth( Double.MAX_VALUE );
     setPrefWidth( 128 );
     setColumnResizePolicy( CONSTRAINED_RESIZE_POLICY );
     getSortOrder().setAll( colCount, colWord );
     getStyleClass().add( "" );
+  }
   private void initListeners( final Workspace workspace ) {
     final var property = workspace.localeProperty( KEY_LANGUAGE_LOCALE );
     property.addListener(
       ( c, o, n ) -> mWordCounter = WordCounter.create( property.toLocale() )
     );
+  }
   private <E, T> TableColumn<E, T> createColumn( final String key ) {
     return new TableColumn<>( key );
+  }
   private void setFontFamily( final String value ) {
     runLater( () -> setStyle( format( "-fx-font-family:'%s';", value ) ) );
+  }
   /**
    * Represents the number of times a word appears in a document.
    */
   protected static final class StatEntry {
     private final StringProperty mWord;
     private final IntegerProperty mTally;
     public StatEntry( final String word, final int tally ) {
       mWord = new SimpleStringProperty( word );
       mTally = new SimpleIntegerProperty( tally );
+    }
     private StringProperty wordProperty() {
       return mWord;
+    }
     private IntegerProperty tallyProperty() {
       return mTally;
+    }
+  }
+}

A src/main/java/com/keenwrite/ui/heuristics/WordCounter.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.heuristics;
 import com.whitemagicsoftware.wordcount.Tokenizer;
 import com.whitemagicsoftware.wordcount.TokenizerFactory;
 import java.util.Locale;
 import java.util.function.BiConsumer;
 /**
  * Responsible for counting unique words as well as total words in a document.
  */
 public class WordCounter {
   /**
    * Parses documents into word counts.
    */
   private final Tokenizer mTokenizer;
   /**
    * Constructs a new {@link WordCounter} instance using the given tokenizer.
+   *
    * @param tokenizer The class responsible for parsing a document into unique
    *                  and total word counts.
    */
   private WordCounter( final Tokenizer tokenizer ) {
     mTokenizer = tokenizer;
+  }
   /**
    * Counts the number of unique words in the document.
+   *
    * @param document The document to tally.
    * @return The total number of words in the document.
    */
   public int count( final String document ) {
     return count( document, ( k, count ) -> {} );
+  }
   /**
    * Counts the number of unique words in the document.
+   *
    * @param document The document to tally.
    * @param consumer The action to take for each unique word/count pair.
    * @return The total number of words in the document.
    */
   public int count(
     final String document, final BiConsumer<String, Integer> consumer ) {
     final var tokens = mTokenizer.tokenize( document );
     final var sum = new int[]{0};
     tokens.forEach( ( k, v ) -> {
       final var count = v[ 0 ];
       consumer.accept( k, count );
       sum[ 0 ] += count;
     } );
     return sum[ 0 ];
+  }
   /**
    * Constructs a new {@link WordCounter} capable of tokenizing a document
    * into words using the given {@link Locale}.
+   *
    * @param locale The {@link Tokenizer}'s language settings.
    */
   public static WordCounter create( final Locale locale ) {
     return new WordCounter( createTokenizer( locale ) );
+  }
   /**
    * Creates a tokenizer for English text (can handle most Latin languages).
+   *
    * @return An English-based tokenizer for counting words.
    */
   private static Tokenizer createTokenizer( final Locale language ) {
     return TokenizerFactory.create( language );
+  }
+}

A src/main/java/com/keenwrite/ui/listeners/CaretStatus.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.listeners;
 import com.keenwrite.editors.common.Caret;
 import com.keenwrite.events.CaretMovedEvent;
 import com.keenwrite.events.WordCountEvent;
 import javafx.scene.control.Label;
 import javafx.scene.layout.VBox;
 import org.greenrobot.eventbus.Subscribe;
 import static com.keenwrite.events.Bus.register;
 import static javafx.application.Platform.runLater;
 import static javafx.geometry.Pos.BASELINE_CENTER;
 /**
  * Responsible for updating the UI whenever the caret changes position.
  * Only one instance of {@link CaretStatus} is allowed, which prevents
  * duplicate adds to the observable property.
  */
 public class CaretStatus extends VBox {
   /**
    * Use an instance of {@link Label} for its built-in CSS style class.
    */
   private final Label mStatusText = new Label();
   /**
    * Contains caret position information within an editor.
    */
   private volatile Caret mCaret = Caret.builder().build();
   /**
    * Approximate number of words in the document.
    */
   private volatile int mCount;
   public CaretStatus() {
     setAlignment( BASELINE_CENTER );
     getChildren().add( mStatusText );
     register( this );
+  }
   @Subscribe
   public void handle( final WordCountEvent event ) {
     mCount = event.getCount();
     updateStatus( mCaret, mCount );
+  }
   @Subscribe
   public void handle( final CaretMovedEvent event ) {
     mCaret = event.getCaret();
     updateStatus( mCaret, mCount );
+  }
   private void updateStatus( final Caret caret, final int count ) {
     assert caret != null;
     runLater( () -> mStatusText.setText( caret + " | " + count ) );
+  }
+}

A src/main/java/com/keenwrite/ui/logging/LogView.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.logging;
 import com.keenwrite.events.StatusEvent;
 import com.keenwrite.ui.clipboard.Clipboard;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 import javafx.collections.ObservableList;
 import javafx.scene.control.*;
 import javafx.scene.input.KeyCodeCombination;
 import javafx.stage.Stage;
 import org.greenrobot.eventbus.Subscribe;
 import java.time.LocalDateTime;
 import java.util.Objects;
 import java.util.TreeSet;
 import static com.keenwrite.Messages.get;
 import static com.keenwrite.constants.Constants.ACTION_PREFIX;
 import static com.keenwrite.constants.GraphicsConstants.ICON_DIALOG;
 import static com.keenwrite.events.Bus.register;
 import static com.keenwrite.events.StatusEvent.clue;
 import static java.time.LocalDateTime.now;
 import static java.time.format.DateTimeFormatter.ofPattern;
 import static javafx.application.Platform.runLater;
 import static javafx.collections.FXCollections.observableArrayList;
 import static javafx.event.ActionEvent.ACTION;
 import static javafx.scene.control.Alert.AlertType.INFORMATION;
 import static javafx.scene.control.ButtonType.OK;
 import static javafx.scene.control.SelectionMode.MULTIPLE;
 import static javafx.scene.input.KeyCode.C;
 import static javafx.scene.input.KeyCode.INSERT;
 import static javafx.scene.input.KeyCombination.CONTROL_ANY;
 import static javafx.stage.Modality.NONE;
 /**
  * Responsible for logging application issues to {@link TableView} entries.
  */
 public final class LogView extends Alert {
   /**
    * Number of error messages to retain in the {@link TableView}; must be
    * greater than zero. Typesetting the document can cause many page number
    * messages to be logged.
    */
   private static final int CACHE_SIZE = 500;
   private final ObservableList<LogEntry> mItems = observableArrayList();
   private final TableView<LogEntry> mTable = new TableView<>( mItems );
   public LogView() {
     super( INFORMATION );
     setTitle( get( ACTION_PREFIX + "view.log.text" ) );
     initModality( NONE );
     initTableView();
     setResizable( true );
     initButtons();
     initIcon();
     initActions();
     register( this );
+  }
   @Subscribe
   public void log( final StatusEvent event ) {
     runLater( () -> {
       final var logEntry = new LogEntry( event );
       if( !mItems.contains( logEntry ) ) {
         mItems.add( logEntry );
         while( mItems.size() > CACHE_SIZE ) {
           mItems.remove( 0 );
+        }
         mTable.scrollTo( logEntry );
+      }
     } );
+  }
   /**
    * Brings the dialog to the foreground, showing it if needed.
    */
   public void view() {
     super.show();
     getStage().toFront();
+  }
   /**
    * Removes all the entries from the list.
    */
   public void clear() {
     mItems.clear();
     clue();
+  }
   private void initTableView() {
     final var ctrlC = new KeyCodeCombination( C, CONTROL_ANY );
     final var ctrlInsert = new KeyCodeCombination( INSERT, CONTROL_ANY );
     final var colDate = new TableColumn<LogEntry, String>( "Timestamp" );
     final var colMessage = new TableColumn<LogEntry, String>( "Message" );
     final var colTrace = new TableColumn<LogEntry, String>( "Trace" );
     colDate.setCellValueFactory( log -> log.getValue().dateProperty() );
     colMessage.setCellValueFactory( log -> log.getValue().messageProperty() );
     colTrace.setCellValueFactory( log -> log.getValue().traceProperty() );
     final var columns = mTable.getColumns();
     columns.add( colDate );
     columns.add( colMessage );
     columns.add( colTrace );
     mTable.setMaxWidth( Double.MAX_VALUE );
     mTable.setPrefWidth( 1024 );
     mTable.getSelectionModel().setSelectionMode( MULTIPLE );
     mTable.setOnKeyPressed( event -> {
       if( ctrlC.match( event ) || ctrlInsert.match( event ) ) {
         copyToClipboard( mTable );
+      }
     } );
     final var pane = getDialogPane();
     pane.setContent( mTable );
+  }
   private void initButtons() {
     final var pane = getDialogPane();
     final var CLEAR = new ButtonType( "CLEAR" );
     pane.getButtonTypes().add( CLEAR );
     final var buttonOk = (Button) pane.lookupButton( OK );
     final var buttonClear = (Button) pane.lookupButton( CLEAR );
     buttonOk.setDefaultButton( true );
     buttonClear.addEventFilter( ACTION, event -> {
       clear();
       event.consume();
     } );
     pane.setOnKeyReleased( t -> {
       switch( t.getCode() ) {
         case ENTER, ESCAPE -> buttonOk.fire();
+      }
     } );
+  }
   private void initIcon() {
     getStage().getIcons().add( ICON_DIALOG );
+  }
   private void initActions() {
     final var stage = getStage();
     stage.setOnCloseRequest( event -> stage.hide() );
+  }
   private Stage getStage() {
     return (Stage) getDialogPane().getScene().getWindow();
+  }
   private static final class LogEntry {
     private final StringProperty mDate;
     private final StringProperty mMessage;
     private final StringProperty mTrace;
     /**
      * Constructs a new {@link LogEntry} for the current time.
      */
     public LogEntry( final StatusEvent event ) {
       mDate = new SimpleStringProperty( toString( now() ) );
       mMessage = new SimpleStringProperty( event.getMessage() );
       mTrace = new SimpleStringProperty( event.getProblem() );
+    }
     private StringProperty messageProperty() {
       return mMessage;
+    }
     private StringProperty dateProperty() {
       return mDate;
+    }
     private StringProperty traceProperty() {
       return mTrace;
+    }
     @Override
     public boolean equals( final Object o ) {
       if( this == o ) { return true; }
       if( o == null || getClass() != o.getClass() ) { return false; }
       return Objects.equals( mMessage.get(), ((LogEntry) o).mMessage.get() );
+    }
     @Override
     public int hashCode() {
       return mMessage != null ? mMessage.hashCode() : 0;
+    }
     @Override
     public String toString() {
       final var date = mDate == null ? "" : mDate.get();
       final var message = mMessage == null ? "" : mMessage.get();
       final var trace = mTrace == null ? "" : mTrace.get();
       return "LogEntry{" +
         "mDate=" + (date == null ? "''" : date) +
         ", mMessage=" + (message == null ? "''" : message) +
         ", mTrace=" + (trace == null ? "''" : trace) +
         '}';
+    }
     private String toString( final LocalDateTime date ) {
       return date.format( ofPattern( "d MMM u HH:mm:ss" ) );
+    }
+  }
   /**
    * Copies the contents of the selected rows into the clipboard; code is from
    * <a href="https://stackoverflow.com/a/48126059/59087">StackOverflow</a>.
+   *
    * @param table The {@link TableView} having selected rows to copy.
    */
   public void copyToClipboard( final TableView<?> table ) {
     final var sb = new StringBuilder();
     final var rows = new TreeSet<Integer>();
     boolean firstRow = true;
     for( final var position : table.getSelectionModel().getSelectedCells() ) {
       rows.add( position.getRow() );
+    }
     for( final var row : rows ) {
       if( !firstRow ) {
         sb.append( '\n' );
+      }
       firstRow = false;
       boolean firstCol = true;
       for( final var column : table.getColumns() ) {
         if( !firstCol ) {
           sb.append( '\t' );
+        }
         firstCol = false;
         final var data = column.getCellData( row );
         sb.append( data == null ? "" : data.toString() );
+      }
+    }
     Clipboard.write( sb );
+  }
+}

A src/main/java/com/keenwrite/ui/outline/DocumentOutline.java

 package com.keenwrite.ui.outline;
 import com.keenwrite.events.Bus;
 import com.keenwrite.events.CaretNavigationEvent;
 import com.keenwrite.events.ParseHeadingEvent;
 import javafx.scene.Node;
 import javafx.scene.control.TreeCell;
 import javafx.scene.control.TreeItem;
 import javafx.scene.control.TreeView;
 import javafx.util.Callback;
 import org.greenrobot.eventbus.Subscribe;
 import static com.keenwrite.events.Bus.register;
 import static com.keenwrite.ui.fonts.IconFactory.createGraphic;
 import static javafx.application.Platform.runLater;
 import static javafx.scene.input.MouseButton.PRIMARY;
 import static javafx.scene.input.MouseEvent.MOUSE_PRESSED;
 public class DocumentOutline extends TreeView<ParseHeadingEvent> {
   private TreeItem<ParseHeadingEvent> mCurrent;
   /**
    * Registers with the {@link Bus}.
    */
   public DocumentOutline() {
     // Override double-click to issue a caret navigation event.
     setCellFactory( new Callback<>() {
       @Override
       public TreeCell<ParseHeadingEvent> call(
         TreeView<ParseHeadingEvent> treeView ) {
         TreeCell<ParseHeadingEvent> cell = new TreeCell<>() {
           @Override
           protected void updateItem( ParseHeadingEvent item, boolean empty ) {
             super.updateItem( item, empty );
             if( empty || item == null ) {
               setText( null );
               setGraphic( null );
+            }
             else {
               setText( item.toString() );
               setGraphic( createIcon() );
+            }
+          }
         };
         cell.addEventFilter( MOUSE_PRESSED, event -> {
           if( event.getButton() == PRIMARY && event.getClickCount() % 2 == 0 ) {
             CaretNavigationEvent.fire( cell.getItem().getOffset() );
             event.consume();
+          }
         } );
         return cell;
+      }
     } );
     register( this );
+  }
   /**
    * Updates the {@link TreeView} with the given event data. This method will
    * track the most recently added {@link TreeItem} so that the nesting
    * hierarchy reflects the document hierarchy.
+   *
    * @param event Represents a document heading to add to the tree.
    */
   @Subscribe
   public void handle( final ParseHeadingEvent event ) {
     runLater(
       () -> mCurrent = event.isNewOutline() ? clear( event ) : addItem( event )
     );
+  }
   private TreeItem<ParseHeadingEvent> clear( final ParseHeadingEvent event ) {
     final var root = createTreeItem( event );
     setRoot( root );
     setShowRoot( false );
     return root;
+  }
   /**
    * This method is called once for every heading in the document. The event
    * data directly corresponds to the sequence of headings in the document.
    * The given event data contains a level that is relative to the last
    * item in the tree.
+   *
    * @param next Contains a level value to indicate heading depth.
    */
   private TreeItem<ParseHeadingEvent> addItem( final ParseHeadingEvent next ) {
     var parent = mCurrent;
     final var item = createTreeItem( next );
     final var curr = parent.getValue();
     final var currLevel = curr.getLevel();
     final var nextLevel = next.getLevel();
     var deltaLevel = currLevel - nextLevel + 1;
     while( deltaLevel > 0 && parent != null ) {
       parent = parent.getParent();
       deltaLevel--;
+    }
     if( parent == null ) {
       parent = getRoot();
+    }
     parent.getChildren().add( item );
     return item;
+  }
   private TreeItem<ParseHeadingEvent> createTreeItem(
     final ParseHeadingEvent event ) {
     final var item = new TreeItem<>( event, createIcon() );
     item.setExpanded( true );
     return item;
+  }
   private Node createIcon() {
     return createGraphic( "BOOKMARK" );
+  }
+}

A src/main/java/com/keenwrite/ui/spelling/TextEditorSpellChecker.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.spelling;
 import com.keenwrite.editors.TextEditor;
 import com.keenwrite.spelling.api.SpellCheckListener;
 import com.keenwrite.spelling.api.SpellChecker;
 import com.vladsch.flexmark.parser.Parser;
 import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.VisitHandler;
 import javafx.beans.property.ObjectProperty;
 import javafx.scene.control.ContextMenu;
 import javafx.scene.control.IndexRange;
 import javafx.scene.control.MenuItem;
 import org.fxmisc.richtext.StyleClassedTextArea;
 import org.fxmisc.richtext.model.PlainTextChange;
 import org.fxmisc.richtext.model.StyleSpansBuilder;
 import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
 import static com.keenwrite.events.StatusEvent.clue;
 import static java.util.Collections.emptyList;
 import static java.util.Collections.singleton;
 import static org.fxmisc.richtext.model.TwoDimensional.Bias.Forward;
 /**
  * Responsible for checking the spelling of a document being edited.
  */
 public final class TextEditorSpellChecker {
   private final ObjectProperty<SpellChecker> mSpellChecker;
   private final Parser mParser = Parser.builder().build();
   /**
    * Create a new spellchecker that can highlight spelling mistakes within a
    * {@link StyleClassedTextArea}. The given {@link SpellChecker} is wrapped
    * in a mutable {@link ObjectProperty} because the user may swap languages
    * at runtime.
+   *
    * @param checker The spellchecker to use when scanning for spelling errors.
    */
   public TextEditorSpellChecker( final ObjectProperty<SpellChecker> checker ) {
     assert checker != null;
     mSpellChecker = checker;
+  }
   /**
    * Call to spellcheck the entire document.
    */
   public void checkDocument( final TextEditor editor ) {
     spellcheck( editor.getTextArea(), editor.getText(), -1 );
+  }
   /**
    * Listen for changes to any particular paragraph and perform a quick
    * spell check upon it. The style classes in the editor will be changed to
    * mark any spelling mistakes in the paragraph. The user may then interact
    * with any misspelled word (i.e., any piece of text that is marked) to
    * revise the spelling.
    * <p>
    * Use {@link PlainTextChange} so that notifications of style changes
    * are suppressed. Checking against the identity ensures that only
    * new text additions or deletions trigger proofreading.
    */
   public void checkParagraph(
     final StyleClassedTextArea editor,
     final PlainTextChange change ) {
     // Check current paragraph; the document was checked when opened.
     final var offset = change.getPosition();
     final var position = editor.offsetToPosition( offset, Forward );
     var paraId = position.getMajor();
     var paragraph = editor.getParagraph( paraId );
     var text = paragraph.getText();
     // If the current paragraph is blank, it may mean the caret is at the
     // start of a new paragraph (i.e., a blank line). Spellcheck the "next"
     // paragraph, instead.
     if( text.isBlank() ) {
       final var paragraphs = editor.getParagraphs().size();
       paraId = Math.min( paraId + 1, paragraphs - 1 );
       paragraph = editor.getParagraph( paraId );
       text = paragraph.getText();
+    }
     // Prevent doubling-up styles.
     editor.clearStyle( paraId );
     spellcheck( editor, text, paraId );
+  }
   /**
    * Spellchecks a subset of the entire document.
+   *
    * @param editor The document (or portions thereof) to spellcheck.
    * @param text   Look up words for this text in the lexicon.
    * @param paraId Set to -1 to apply resulting style spans to the entire text.
    */
   private void spellcheck(
     final StyleClassedTextArea editor, final String text, final int paraId ) {
     final var builder = new StyleSpansBuilder<Collection<String>>();
     final var runningIndex = new AtomicInteger( 0 );
     // The text nodes must be relayed through a contextual "visitor" that
     // can return text in chunks with correlative offsets into the string.
     // This allows Markdown and R Markdown documents to return sets of
     // words to check.
     final var node = mParser.parse( text );
     final var visitor = new TextVisitor( ( visited, bIndex, eIndex ) -> {
       // Treat hyphenated compound words as individual words.
       final var check = visited.replace( '-', ' ' );
       final var checker = getSpellChecker();
       checker.proofread( check, ( misspelled, prevIndex, currIndex ) -> {
         prevIndex += bIndex;
         currIndex += bIndex;
         // Clear styling between lexiconically absent words.
         builder.add( emptyList(), prevIndex - runningIndex.get() );
         builder.add( singleton( "spelling" ), currIndex - prevIndex );
         runningIndex.set( currIndex );
       } );
     } );
     visitor.visit( node );
     // If the running index was set, at least one word triggered the listener.
     if( runningIndex.get() > 0 ) {
       // Clear styling after the last lexiconically absent word.
       builder.add( emptyList(), text.length() - runningIndex.get() );
       final var spans = builder.create();
       if( paraId >= 0 ) {
         editor.setStyleSpans( paraId, 0, spans );
+      }
       else {
         editor.setStyleSpans( 0, spans );
+      }
+    }
+  }
   /**
    * Called to display a pop-up with a list of spelling corrections. When the
    * user selects an item from the list, the word at the caret position is
    * replaced (with the selected item).
    */
   public void autofix( final TextEditor editor ) {
     final var caretWord = editor.getCaretWord();
     final var textArea = editor.getTextArea();
     final var word = textArea.getText( caretWord );
     final var suggestions = checkWord( word, 10 );
     if( suggestions.isEmpty() ) {
       clue( "Editor.spelling.check.matches.none", word );
+    }
     else if( !suggestions.contains( word ) ) {
       final var menu = createSuggestionsPopup( textArea );
       final var items = menu.getItems();
       textArea.setContextMenu( menu );
       for( final var correction : suggestions ) {
         items.add( createSuggestedItem( textArea, caretWord, correction ) );
+      }
       textArea.getCaretBounds().ifPresent(
         bounds -> {
           menu.setOnShown( event -> menu.requestFocus() );
           menu.show( textArea, bounds.getCenterX(), bounds.getCenterY() );
+        }
       );
+    }
     else {
       clue( "Editor.spelling.check.matches.okay", word );
+    }
+  }
   private ContextMenu createSuggestionsPopup(
     final StyleClassedTextArea textArea ) {
     final var menu = new ContextMenu();
     menu.setAutoHide( true );
     menu.setHideOnEscape( true );
     menu.setOnHidden( event -> textArea.setContextMenu( null ) );
     return menu;
+  }
   /**
    * Creates a menu item capable of replacing a word under the cursor.
+   *
    * @param textArea The text upon which this action will replace.
    * @param i        The beginning and ending text offset to replace.
    * @param s        The text to replace at the given offset.
    * @return The menu item that, if actioned, will replace the text.
    */
   private MenuItem createSuggestedItem(
     final StyleClassedTextArea textArea,
     final IndexRange i,
     final String s ) {
     final var menuItem = new MenuItem( s );
     menuItem.setOnAction( event -> textArea.replaceText( i, s ) );
     return menuItem;
+  }
   /**
    * Returns a list of suggests for the given word. This is typically used to
    * check for suitable replacements of the word at the caret position.
+   *
    * @param word  The word to spellcheck.
    * @param count The maximum number of suggested alternatives to return.
    * @return A list of recommended spellings for the given word.
    */
   public List<String> checkWord( final String word, final int count ) {
     return getSpellChecker().suggestions( word, count );
+  }
   private SpellChecker getSpellChecker() {
     return mSpellChecker.get();
+  }
   private static final class TextVisitor {
     private final NodeVisitor mVisitor = new NodeVisitor( new VisitHandler<>(
       com.vladsch.flexmark.ast.Text.class, this::visit )
     );
     private final SpellCheckListener mConsumer;
     public TextVisitor( final SpellCheckListener consumer ) {
       mConsumer = consumer;
+    }
     private void visit( final com.vladsch.flexmark.util.ast.Node node ) {
       if( node instanceof com.vladsch.flexmark.ast.Text ) {
         mConsumer.accept( node.getChars().toString(),
                           node.getStartOffset(),
                           node.getEndOffset() );
+      }
       mVisitor.visitChildren( node );
+    }
+  }
+}

A src/main/java/com/keenwrite/ui/tree/AltTreeView.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.tree;
 import com.keenwrite.ui.cells.AltTreeCell;
 import javafx.scene.control.TreeItem;
 import javafx.scene.control.TreeView;
 import javafx.util.StringConverter;
 /**
  * Responsible for allowing users to edit items in the tree as well as
  * drag and drop. The goal is to be a drop-in replacement for the regular
  * JavaFX {@link TreeView}, which does not offer editing and moving {@link
  * TreeItem} instances.
+ *
  * @param <T> The type of data to edit.
  */
 public class AltTreeView<T> extends TreeView<T> {
   public AltTreeView(
     final TreeItem<T> root, final StringConverter<T> converter ) {
     super( root );
     assert root != null;
     assert converter != null;
     setEditable( true );
     setCellFactory( treeView -> new AltTreeCell<>( converter ) );
     setShowRoot( false );
     // When focus is lost while not editing, deselect all items.
     focusedProperty().addListener( ( c, o, n ) -> {
       if( o && getEditingItem() == null ) {
         getSelectionModel().clearSelection();
+      }
     } );
+  }
+}

A src/main/java/com/keenwrite/ui/tree/TreeItemConverter.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.ui.tree;
 import javafx.util.StringConverter;
 /**
  * Responsible for converting objects to and from string instances. The
  * tree items contain only strings, so this effectively is a string-to-string
  * converter, which allows the implementation to retain its generics.
  */
 public class TreeItemConverter extends StringConverter<String> {
   @Override
   public String toString( final String object ) {
     return sanitize( object );
+  }
   @Override
   public String fromString( final String string ) {
     return sanitize( string );
+  }
   private String sanitize( final String string ) {
     return string == null ? "" : string;
+  }
+}

A src/main/java/com/keenwrite/util/AlphanumComparator.java

 /*
  * The Alphanum Algorithm is an improved sorting algorithm for strings
  * containing numbers. Rather than sort numbers in ASCII order like
  * a standard sort, this algorithm sorts numbers in numeric order.
+ *
  * The Alphanum Algorithm is discussed at http://www.DaveKoelle.com
+ *
  * Released under the MIT License - https://opensource.org/licenses/MIT
+ *
  * Copyright 2007-2017 David Koelle
+ *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
+ *
  * The above copyright notice and this permission notice shall be included
  * in all copies or substantial portions of the Software.
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 package com.keenwrite.util;
 import java.util.Comparator;
 import static java.lang.Character.isDigit;
 /**
  * Responsible for sorting lists that may contain numeric values. Usage:
  * <pre>
  *   Collections.sort(list, new AlphanumComparator());
  * </pre>
  * <p>
  * Where "list" is the list to sort alphanumerically, not lexicographically.
  * </p>
  */
 public final class AlphanumComparator<T> implements Comparator<T> {
   /**
    * Returns a chunk of text that is continuous with respect to digits or
    * non-digits.
+   *
    * @param s      The string to compare.
    * @param length The string length, for improved efficiency.
    * @param marker The current index into a subset of the given string.
    * @return The substring {@code s} that is a continuous text chunk of the
    * same character type.
    */
   private StringBuilder chunk( final String s, final int length, int marker ) {
     assert s != null;
     assert length >= 0;
     assert marker < length;
     // Prevent any possible memory re-allocations by using the length.
     final var chunk = new StringBuilder( length );
     var c = s.charAt( marker );
     final var chunkType = isDigit( c );
     // While the character at the current position is the same type (numeric or
     // alphabetic), append the character to the current chunk.
     while( marker < length &&
       isDigit( c = s.charAt( marker++ ) ) == chunkType ) {
       chunk.append( c );
+    }
     return chunk;
+  }
   /**
    * Performs an alphanumeric comparison of two strings, sorting numerically
    * first when numbers are found within the string. If either argument is
    * {@code null}, this will return zero.
+   *
    * @param o1 The object to compare against {@code s2}, converted to string.
    * @param o2 The object to compare against {@code s1}, converted to string.
    * @return a negative integer, zero, or a positive integer if the first
    * argument is less than, equal to, or greater than the second, respectively.
    */
   @Override
   public int compare( final T o1, final T o2 ) {
     if( o1 == null || o2 == null ) {
       return 0;
+    }
     final var s1 = o1.toString();
     final var s2 = o2.toString();
     final var s1Length = s1.length();
     final var s2Length = s2.length();
     var thisMarker = 0;
     var thatMarker = 0;
     while( thisMarker < s1Length && thatMarker < s2Length ) {
       final var thisChunk = chunk( s1, s1Length, thisMarker );
       final var thisChunkLength = thisChunk.length();
       thisMarker += thisChunkLength;
       final var thatChunk = chunk( s2, s2Length, thatMarker );
       final var thatChunkLength = thatChunk.length();
       thatMarker += thatChunkLength;
       // If both chunks contain numeric characters, sort them numerically
       int result;
       if( isDigit( thisChunk.charAt( 0 ) ) &&
         isDigit( thatChunk.charAt( 0 ) ) ) {
         // If equal, the first different number counts
         if( (result = thisChunkLength - thatChunkLength) == 0 ) {
           for( var i = 0; i < thisChunkLength; i++ ) {
             result = thisChunk.charAt( i ) - thatChunk.charAt( i );
             if( result != 0 ) {
               return result;
+            }
+          }
+        }
+      }
       else {
         result = thisChunk.compareTo( thatChunk );
+      }
       if( result != 0 ) {
         return result;
+      }
+    }
     return s1Length - s2Length;
+  }
+}

A src/main/java/com/keenwrite/util/CyclicIterator.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.NoSuchElementException;
 /**
  * Responsible for iterating over a list either forwards or backwards. When
  * the iterator reaches the last element in the list, the next element will
  * be the first. When the iterator reaches the first element in the list,
  * the previous element will be the last.
  * <p>
  * Due to the ability to move forwards and backwards through the list, rather
  * than force client classes to track the list index independently, this
  * iterator provides an accessor to the index. The index is zero-based.
  * </p>
+ *
  * @param <T> The type of list to be cycled.
  */
 public final class CyclicIterator<T> implements ListIterator<T> {
   private final List<T> mList;
   /**
    * Initialize to an invalid index so that the first calls to either
    * {@link #previous()} or {@link #next()} will return the starting or ending
    * element.
    */
   private int mIndex = -1;
   /**
    * Creates an iterator that cycles indefinitely through the given list.
+   *
    * @param list The list to cycle through indefinitely.
    */
   public CyclicIterator( final List<T> list ) {
     mList = list;
+  }
   /**
    * @return {@code true} if there is at least one element.
    */
   @Override
   public boolean hasNext() {
     return !mList.isEmpty();
+  }
   /**
    * @return {@code true} if there is at least one element.
    */
   @Override
   public boolean hasPrevious() {
     return !mList.isEmpty();
+  }
   @Override
   public int nextIndex() {
     return computeIndex( +1 );
+  }
   @Override
   public int previousIndex() {
     return computeIndex( -1 );
+  }
   @Override
   public void remove() {
     mList.remove( mIndex );
+  }
   @Override
   public void set( final T t ) {
     mList.set( mIndex, t );
+  }
   @Override
   public void add( final T t ) {
     mList.add( mIndex, t );
+  }
   /**
    * Returns the next item in the list, which will cycle to the first
    * item as necessary.
+   *
    * @return The next item in the list, cycling to the start if needed.
    */
   @Override
   public T next() {
     return cycle( +1 );
+  }
   /**
    * Returns the previous item in the list, which will cycle to the last
    * item as necessary.
+   *
    * @return The previous item in the list, cycling to the end if needed.
    */
   @Override
   public T previous() {
     return cycle( -1 );
+  }
   /**
    * Cycles to the next or previous element, depending on the direction value.
+   *
    * @param direction Use -1 for previous, +1 for next.
    * @return The next or previous item in the list.
    */
   private T cycle( final int direction ) {
     try {
       return mList.get( mIndex = computeIndex( direction ) );
     } catch( final Exception ex ) {
       throw new NoSuchElementException( ex );
+    }
+  }
   /**
    * Returns the index of the value retrieved from the most recent call to
    * either {@link #previous()} or {@link #next()}.
+   *
    * @return The list item index or -1 if no calls have been made to retrieve
    * an item from the list.
    */
   public int getIndex() {
     return mIndex;
+  }
   private int computeIndex( final int direction ) {
     final var i = mIndex + direction;
     final var size = mList.size();
     final var result = i < 0
         ? size - 1
         : size == 0 ? 0 : i % size;
     // Ensure the invariant holds.
     assert 0 <= result && result < size || size == 0;
     return result;
+  }
+}

A src/main/java/com/keenwrite/util/DataTypeConverter.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import static java.nio.charset.StandardCharsets.US_ASCII;
 import static java.nio.charset.StandardCharsets.UTF_8;
 /**
  * Responsible for converting various data types into other representations.
  */
 public final class DataTypeConverter {
   private static final byte[] HEX = "0123456789ABCDEF".getBytes( US_ASCII );
   /**
    * Returns a hexadecimal number that represents the bit sequences provided
    * in the given array of bytes.
+   *
    * @param bytes The bytes to convert to a hexadecimal string.
    * @return An uppercase-encoded hexadecimal number.
    */
   public static String toHex( final byte[] bytes ) {
     final var hexChars = new byte[ bytes.length * 2 ];
     final var len = bytes.length;
     for( var i = 0; i < len; i++ ) {
       final var digit = bytes[ i ] & 0xFF;
       hexChars[ (i << 1) ] = HEX[ digit >>> 4 ];
       hexChars[ (i << 1) + 1 ] = HEX[ digit & 0x0F ];
+    }
     return new String( hexChars, UTF_8 );
+  }
   /**
    * Hashes a string using the SHA-1 algorithm.
+   *
    * @param s The string to has.
    * @return The hashed string.
    * @throws NoSuchAlgorithmException Could not find the SHA-1 algorithm.
    */
   public static byte[] hash( final String s ) throws NoSuchAlgorithmException {
     final var digest = MessageDigest.getInstance( "SHA-1" );
     return digest.digest( s.getBytes() );
+  }
+}

A src/main/java/com/keenwrite/util/Diacritics.java

 /* Copyright 2023 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import static java.text.Normalizer.Form.NFD;
 import static java.text.Normalizer.normalize;
 /**
  * Responsible for modifying diacritics.
  */
 public class Diacritics {
   private static final String UNCRITIC = "\\p{M}+";
   /**
    * Returns the value of the string without diacritic marks.
+   *
    * @param text The text to normalize.
    * @return A non-null, possibly empty string.
    */
   public static String remove( final String text ) {
     return normalize( text, NFD ).replaceAll( UNCRITIC, "" );
+  }
+}

A src/main/java/com/keenwrite/util/FileWalker.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.function.Consumer;
 import static java.nio.file.FileSystems.getDefault;
 /**
  * Responsible for finding files in a file system that match a particular
  * globbing file name pattern.
+ *
  * @see ResourceWalker#walk(String, String, Consumer)
  */
 public class FileWalker {
   /**
    * Walks the given directory hierarchy for files that match the given
    * globbing file name pattern. This will search to a depth of 10 directories
    * deep (to avoid infinite recursion).
+   *
    * @param path Root directory to scan for files matching the glob.
    * @param glob Only files matching the pattern will be consumed.
    * @param c    Function to call for each matching path found.
    * @throws IOException Could not walk the tree.
    */
   public static void walk(
     final Path path, final String glob, final Consumer<Path> c )
     throws IOException {
     final var matcher = getDefault().getPathMatcher( "glob:" + glob );
     try( final var walk = Files.walk( path, 10 ) ) {
       for( final var it = walk.iterator(); it.hasNext(); ) {
         final var p = it.next();
         if( matcher.matches( p ) ) {
           c.accept( p );
+        }
+      }
+    }
+  }
+}

A src/main/java/com/keenwrite/util/FontLoader.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.awt.*;
 import java.awt.font.TextAttribute;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URI;
 import java.util.Map;
 import static com.keenwrite.constants.Constants.FONT_DIRECTORY;
 import static com.keenwrite.events.StatusEvent.clue;
 import static com.keenwrite.util.ProtocolScheme.valueFrom;
 import static com.keenwrite.util.ResourceWalker.walk;
 import static java.awt.Font.TRUETYPE_FONT;
 import static java.awt.Font.createFont;
 import static java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment;
 import static java.awt.font.TextAttribute.*;
 /**
  * Loads fonts into the application's {@link GraphicsEnvironment} so that
  * preview can display text using non-system fonts.
  */
 public final class FontLoader {
   /**
    * Globbing pattern to match font names.
    */
   public static final String GLOB_FONTS = "**.{ttf,otf}";
   /**
    * Walks the resources associated with the application to load all TrueType
    * font resources found. This method must run before the windowing system
    * kicks in, otherwise the fonts will not be found.
    * <p>
    * All fonts must be TrueType fonts. No PostScript Type 1 fonts are
    * supported.
    * </p>
    */
   public static void initFonts() {
     // Editor, preview, and TeX fonts
     initFonts( FONT_DIRECTORY );
     // FontAwesome font
     initFonts( "/org" );
+  }
   @SuppressWarnings( "unchecked" )
   private static void initFonts( final String directory ) {
     try {
       final var ge = getLocalGraphicsEnvironment();
       walk(
         directory, GLOB_FONTS, path -> {
           final var uri = path.toUri();
           final var filename = path.toString();
           try( final var is = openFont( uri, filename ) ) {
             final var font = createFont( TRUETYPE_FONT, is );
             final var attributes =
               (Map<TextAttribute, Integer>) font.getAttributes();
             attributes.put( LIGATURES, LIGATURES_ON );
             attributes.put( KERNING, KERNING_ON );
             ge.registerFont( font.deriveFont( attributes ) );
           } catch( final Exception ex ) {
             clue( ex );
+          }
+        }
       );
     } catch( final Exception ex ) {
       clue( ex );
+    }
+  }
   /**
    * Attempts to open a font, regardless of whether the font is a resource in
    * a JAR file or somewhere on the file system.
+   *
    * @param uri      Directory or archive containing a font.
    * @param filename Name of the font file.
    * @return An open file handled to the font.
    * @throws IOException Could not open the resource as a stream.
    */
   private static InputStream openFont( final URI uri, final String filename )
     throws IOException {
     return valueFrom( uri ).isJar()
       ? FontLoader.class.getResourceAsStream( filename )
       : new FileInputStream( filename );
+  }
+}

A src/main/java/com/keenwrite/util/GenericBuilder.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
 /**
  * Responsible for constructing objects that would otherwise require
  * a long list of constructor parameters.
  * <p>
  * See <a href="https://stackoverflow.com/a/31754787/59087">source</a> for
  * details.
+ *
  * @param <MT> The mutable definition for the type of object to build.
  * @param <IT> The immutable definition for the type of object to build.
  */
 public class GenericBuilder<MT, IT> {
   /**
    * Provides the methods to use for setting object properties.
    */
   private final Supplier<MT> mMutable;
   /**
    * Calling {@link #build()} will instantiate the immutable instance using
    * the mutator.
    */
   private final Function<MT, IT> mImmutable;
   /**
    * Adds a modifier to call when building an instance.
    */
   private final List<Consumer<MT>> mModifiers = new LinkedList<>();
   /**
    * Starting point for building an instance of a particular class.
+   *
    * @param supplier Returns the instance to build.
    * @param <MT>     The type of class to build.
    * @return A new {@link GenericBuilder} capable of populating data for an
    * instance of the class provided by the {@link Supplier}.
    */
   public static <MT, IT> GenericBuilder<MT, IT> of(
     final Supplier<MT> supplier, final Function<MT, IT> immutable ) {
     return new GenericBuilder<>( supplier, immutable );
+  }
   /**
    * Constructs a new builder instance that is capable of populating values for
    * any type of object.
+   *
    * @param mutator Provides methods to use for setting object properties.
    */
   protected GenericBuilder(
     final Supplier<MT> mutator, final Function<MT, IT> immutable ) {
     assert mutator != null;
     assert immutable != null;
     mMutable = mutator;
     mImmutable = immutable;
+  }
   /**
    * Registers a new value with the builder.
+   *
    * @param consumer Accepts a value to be set upon the built object.
    * @param value    The value to use when building.
    * @param <V>      The type of value used when building.
    * @return This {@link GenericBuilder} instance.
    */
   public <V> GenericBuilder<MT, IT> with(
     final BiConsumer<MT, V> consumer, final V value ) {
     assert consumer != null;
     mModifiers.add( instance -> consumer.accept( instance, value ) );
     return this;
+  }
   /**
    * Instantiates then populates the immutable object to build.
+   *
    * @return The newly built object.
    */
   public IT build() {
     final var value = mMutable.get();
     mModifiers.forEach( modifier -> modifier.accept( value ) );
     mModifiers.clear();
     return mImmutable.apply( value );
+  }
+}

A src/main/java/com/keenwrite/util/ProtocolScheme.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.io.File;
 import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URL;
 import static com.keenwrite.events.StatusEvent.clue;
 /**
  * Represents the type of data encoding scheme used for a universal resource
  * indicator. Prefer to use the {@code is*} methods to check equality because
  * there are cases where the protocol represents more than one possible type
  * (e.g., a Java Archive is a file, so comparing {@link #FILE} directly could
  * lead to incorrect results).
  */
 public enum ProtocolScheme {
   /**
    * Denotes a local file.
    */
   FILE,
   /**
    * Denotes either HTTP or HTTPS.
    */
   HTTP,
   /**
    * Denotes the File Transfer Protocol.
    */
   FTP,
   /**
    * Denotes Java archive file.
    */
   JAR,
   /**
    * Could not determine schema (or is not supported by the application).
    */
   UNKNOWN;
   /**
    * Returns the protocol for a given URI or file name.
+   *
    * @param uri Determine the protocol for this URI or file name.
    * @return The protocol for the given resource.
    */
   public static ProtocolScheme getProtocol( final String uri ) {
     try {
       return getProtocol( new URI( uri ) );
     } catch( final Exception ex ) {
       // Using double-slashes is a shorthand to instruct the browser to
       // reference a resource using the parent URL's security model. This
       // is known as a protocol-relative URL.
       return uri.startsWith( "//" ) ? HTTP : valueFrom( new File( uri ) );
+    }
+  }
   /**
    * Returns the protocol for a given URI or file name.
+   *
    * @param uri Determine the protocol for this URI or file name.
    * @return The protocol for the given resource.
    */
   public static ProtocolScheme getProtocol( final URI uri )
     throws MalformedURLException {
     return uri.isAbsolute()
       ? valueFrom( uri )
       : valueFrom( uri.toURL() );
+  }
   /**
    * Determines the protocol scheme for a given string.
+   *
    * @param protocol A string representing data encoding protocol scheme.
    * @return {@link #UNKNOWN} if the protocol is unrecognized, otherwise a
    * valid value from this enumeration.
    */
   public static ProtocolScheme valueFrom( final String protocol ) {
     final var sanitized = protocol == null ? "" : protocol.toUpperCase();
     for( final var scheme : values() ) {
       // This will match HTTP/HTTPS as well as FILE*, which may be inaccurate.
       if( sanitized.startsWith( scheme.name() ) ) {
         return scheme;
+      }
+    }
     return UNKNOWN;
+  }
   /**
    * Determines the protocol scheme for a given {@link File}.
+   *
    * @param file A file having a URI that contains a protocol scheme.
    * @return {@link #UNKNOWN} if the protocol is unrecognized, otherwise a
    * valid value from this enumeration.
    */
   public static ProtocolScheme valueFrom( final File file ) {
     return valueFrom( file.toURI() );
+  }
   /**
    * Determines the protocol scheme for a given {@link URI}.
+   *
    * @param uri A URI that contains a protocol scheme.
    * @return {@link #UNKNOWN} if the protocol is unrecognized, otherwise a
    * valid value from this enumeration.
    */
   public static ProtocolScheme valueFrom( final URI uri ) {
     try {
       return valueFrom( uri.toURL() );
     } catch( final Exception ex ) {
       clue( ex );
       return UNKNOWN;
+    }
+  }
   /**
    * Determines the protocol scheme for a given {@link URL}.
+   *
    * @param url The {@link URL} containing a protocol scheme.
    * @return {@link #UNKNOWN} if the protocol is unrecognized, otherwise a
    * valid value from this enumeration.
    */
   public static ProtocolScheme valueFrom( final URL url ) {
     return valueFrom( url.getProtocol() );
+  }
   /**
    * Answers whether the given {@link URL} points to a remote resource.
+   *
    * @param url The {@link URL} containing a protocol scheme.
    * @return {@link true} if the protocol must be fetched via HTTP or FTP.
    */
   public static boolean isRemote( final URL url ) {
     return valueFrom( url ).isRemote();
+  }
   /**
    * Answers {@code true} if the given protocol is for a local file, which
    * includes a JAR file.
+   *
    * @return {@code false} the protocol is not a local file reference.
    */
   public boolean isFile() {
     return this == FILE || this == JAR;
+  }
   /**
    * Answers whether the given protocol is HTTP or HTTPS.
+   *
    * @return {@code true} the protocol is either HTTP or HTTPS.
    */
   public boolean isHttp() {
     return this == HTTP;
+  }
   /**
    * Answers whether the given protocol is FTP.
+   *
    * @return {@code true} the protocol is FTP.
    */
   public boolean isFtp() {
     return this == HTTP;
+  }
   /**
    * Answers whether the given protocol represents a remote resource.
+   *
    * @return {@code true} the protocol is HTTP or FTP.
    */
   public boolean isRemote() {
     return isHttp() || isFtp();
+  }
   /**
    * Answers {@code true} if the given protocol is for a Java archive file.
+   *
    * @return {@code false} the protocol is not a Java archive file.
    */
   public boolean isJar() {
     return this == JAR;
+  }
+}

A src/main/java/com/keenwrite/util/RangeValidator.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.Predicate;
 /**
  * Responsible for answering whether a given integer value falls within a
  * set of range specifiers. For example, if the range is "1-3, 5, 7-9, 11-",
  * then values of 0, 4, and 10 return {@code false} while values of 2, 5,
  * and 37 would return {@code true}.
  */
 public final class RangeValidator implements Predicate<Integer> {
   /**
    * Container for a pair of integer values that can answer whether a given
    * value is included within the bounds provided by the pair.
    */
   private static class Range {
     private final int mLo;
     private final int mHi;
     private Range( final int lo, final int hi ) {
       assert lo <= hi;
       mLo = lo;
       mHi = hi;
+    }
     private boolean includes( final int i ) {
       return mLo <= i && i <= mHi || mLo == -1 && mHi == -1;
+    }
+  }
   private final List<Range> mRanges = new ArrayList<>();
   /**
    * Creates an instance of {@link RangeValidator} that can verify whether
    * an integer value will fall within one of the numeric ranges in the
    * given listing.
+   *
    * @param range The listing of ranges to validate against.
    */
   public RangeValidator( final String range ) {
     assert normalize( range ).equals( range );
     parse( range );
+  }
   @Override
   public boolean test( final Integer integer ) {
     for( final var range : mRanges ) {
       if( range.includes( integer ) ) {
         return true;
+      }
+    }
     return false;
+  }
   /**
    * Given a string meant to represent a comma-separated range of numbers,
    * this will ensure that the range meets the formatting requirements.
+   *
    * @param range The sequences to validate (can be {@code null}).
    * @return The given range with all non-conforming characters removed, or
    * the empty string if {@code null} was provided.
    */
   public static String normalize( final String range ) {
     return range == null
       ? ""
       : range.matches( "^\\d+(-\\d+)?(?:,\\d+(?:-\\d+)?)*+$" )
       ? range
       : range.replaceAll( "[^-,\\d\\s]", "" );
+  }
   /**
    * Populates the internal list of {@link Range} instances.
+   *
    * @param s The string containing zero or more comma-separated integer
    *          ranges, themselves separated by hyphens.
    */
   private void parse( final String s ) {
     for( final var commaRange : normalize( s ).split( "," ) ) {
       final var hyphenRanges = commaRange.split( "-" );
       final Range range;
       if( hyphenRanges.length == 2 ) {
         final var hrlo = hyphenRanges[ 0 ].trim();
         final var hrhi = hyphenRanges[ 1 ].trim();
         if( hrlo.isEmpty() ) {
           range = new Range( 1, Integer.parseInt( hrhi ) );
+        }
         else {
           final var lo = Integer.parseInt( hrlo );
           final var hi = Integer.parseInt( hrhi );
           range = new Range( lo, hi );
+        }
+      }
       else if( hyphenRanges.length == 1 ) {
         final var hri = hyphenRanges[ 0 ].trim();
         if( hri.isEmpty() ) {
           // Special case for all numbers being valid.
           range = new Range( -1, -1 );
+        }
         else {
           final var i = Integer.parseInt( hyphenRanges[ 0 ].trim() );
           final var index = commaRange.trim().indexOf( '-' );
           // If the hyphen is to the left of the number, the range is bounded
           // from 0 to the number. Otherwise, the range is "unbounded" starting
           // at the number.
           if( index == -1 ) {
             range = new Range( i, i );
+          }
           else if( index == 0 ) {
             range = new Range( 1, i );
+          }
           else {
             range = new Range( i, Integer.MAX_VALUE );
+          }
+        }
+      }
       else {
         // Ignore the range.
         range = new Range( 0, 0 );
+      }
       mRanges.add( range );
+    }
+  }
+}

A src/main/java/com/keenwrite/util/ResourceWalker.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.io.IOException;
 import java.net.URISyntaxException;
 import java.nio.file.FileSystem;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.function.Consumer;
 import static com.keenwrite.util.ProtocolScheme.JAR;
 import static com.keenwrite.util.ProtocolScheme.valueFrom;
 import static java.nio.file.FileSystems.newFileSystem;
 import static java.util.Collections.emptyMap;
 /**
  * Responsible for finding file resources, regardless if they exist within
  * a Java Archive (.jar) file or on the native file system.
+ *
  * @see FileWalker#walk(Path, String, Consumer)
  */
 public final class ResourceWalker {
   /**
    * Walks the given directory hierarchy for files that match the given
    * globbing file name pattern.
+   *
    * @param directory Root directory to scan for files matching the glob.
    * @param glob      Only files matching the pattern will be consumed.
    * @param c         Function to call for each matching path found.
    * @throws IOException        Could not walk the tree.
    * @throws URISyntaxException Could not convert the resource to a URI.
    */
   public static void walk(
     final String directory, final String glob, final Consumer<Path> c )
     throws URISyntaxException, IOException {
     final var resource = ResourceWalker.class.getResource( directory );
     if( resource != null ) {
       final var uri = resource.toURI();
       final Path path;
       FileSystem fs = null;
       if( valueFrom( uri ) == JAR ) {
         fs = newFileSystem( uri, emptyMap() );
         path = fs.getPath( directory );
+      }
       else {
         path = Paths.get( uri );
+      }
       try {
         FileWalker.walk( path, glob, c );
       } finally {
         if( fs != null ) { fs.close(); }
+      }
+    }
+  }
+}

A src/main/java/com/keenwrite/util/Time.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import java.time.Duration;
 import static java.lang.String.format;
 import static java.util.concurrent.TimeUnit.*;
 /**
  * Responsible for time-related functionality.
  */
 public final class Time {
   /**
    * Converts an elapsed time to a human-readable format (hours, minutes,
    * seconds, and milliseconds).
+   *
    * @param duration An elapsed time.
    * @return Human-readable elapsed time.
    */
   public static String toElapsedTime( final Duration duration ) {
     final var elapsed = duration.toMillis();
     final var hours = MILLISECONDS.toHours( elapsed );
     final var eHours = elapsed - HOURS.toMillis( hours );
     final var minutes = MILLISECONDS.toMinutes( eHours );
     final var eMinutes = eHours - MINUTES.toMillis( minutes );
     final var seconds = MILLISECONDS.toSeconds( eMinutes );
     final var eSeconds = eMinutes - SECONDS.toMillis( seconds );
     final var milliseconds = MILLISECONDS.toMillis( eSeconds );
     return format( "%02d:%02d:%02d.%03d",
                    hours, minutes, seconds, milliseconds );
+  }
+}

A src/main/module-info.txt

 module keenwrite.main {
   requires java.desktop;
   requires java.prefs;
   requires java.scripting;
   requires java.xml;
   requires javafx.graphics;
   requires javafx.controls;
   requires javafx.swing;
   requires annotations;
   requires echosvg.anim;
   requires echosvg.bridge;
   requires echosvg.css;
   requires echosvg.gvt;
   requires echosvg.transcoder;
   requires echosvg.util;
   requires com.dlsc.formsfx;
   requires transitive com.dlsc.preferencesfx;
   requires com.fasterxml.jackson.databind;
   requires transitive com.fasterxml.jackson.dataformat.yaml;
   requires flexmark;
   requires flexmark.util.data;
   requires flexmark.util.sequence;
   requires keenquotes;
   requires keentex;
   requires tokenize;
   requires org.apache.commons.lang3;
   requires org.jsoup;
   requires org.controlsfx.controls;
   requires org.fxmisc.flowless;
   requires org.fxmisc.richtext;
   requires org.fxmisc.undo;
   requires commons.io;
   requires eventbus.java;
   requires flying.saucer.core;
   requires info.picocli;
   requires jsymspell;
   requires tiwulfx.dock;
   requires wellbehavedfx;
   requires xml.apis.ext;
   requires java.logging;
+}

A src/main/resources/META-INF/services/com.keenwrite.service.Settings

1
	1	com.keenwrite.service.impl.DefaultSettings

A src/main/resources/META-INF/services/com.keenwrite.service.events.Notifier

1
	1	com.keenwrite.service.events.impl.DefaultNotifier

A src/main/resources/bootstrap.properties

	1	application.title=KeenWrite
	2	container.version=2.11.5
1	3

A src/main/resources/com/keenwrite/.gitignore

	1	app.properties
1	2

A src/main/resources/com/keenwrite/app-title.svg

 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <svg
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:cc="http://creativecommons.org/ns#"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:svg="http://www.w3.org/2000/svg"
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 workspace.ui.skin.custom=Custom
 workspace.ui.skin.custom.desc=User-defined JavaFX cascading stylesheet file.
 workspace.ui.skin.custom.title=Path
 workspace.ui.preview=Preview
 workspace.ui.preview.stylesheet=Stylesheet
 workspace.ui.preview.stylesheet.desc=User-defined HTML cascading stylesheet file.
 workspace.ui.preview.stylesheet.title=Path
 workspace.ui.font=Fonts
 workspace.ui.font.editor=Editor Font
 workspace.ui.font.editor.name=Name
 workspace.ui.font.editor.name.desc=Text editor font name (sans-serif font recommended).
 workspace.ui.font.editor.name.title=Family
 workspace.ui.font.editor.size=Size
 workspace.ui.font.editor.size.desc=Font size.
 workspace.ui.font.editor.size.title=Points
 workspace.ui.font.preview=Preview Font
 workspace.ui.font.preview.name=Name
 workspace.ui.font.preview.name.desc=Preview pane font name (must support ligatures, serif font recommended).
 workspace.ui.font.preview.name.title=Family
 workspace.ui.font.preview.size=Size
 workspace.ui.font.preview.size.desc=Font size.
 workspace.ui.font.preview.size.title=Points
 workspace.ui.font.preview.mono.name=Name
 workspace.ui.font.preview.mono.name.desc=Monospace font name.
 workspace.ui.font.preview.mono.name.title=Family
 workspace.ui.font.preview.mono.size=Size
 workspace.ui.font.preview.mono.size.desc=Monospace font size.
 workspace.ui.font.preview.mono.size.title=Points
 workspace.ui.font.math=Math Font
 workspace.ui.font.math.size.title=Scale
 workspace.language=Language
 workspace.language.locale=Internationalization
 workspace.language.locale.desc=Language for application and HTML export.
 workspace.language.locale.title=Locale
 # ########################################################################
 # Editor actions
 # ########################################################################
 Editor.spelling.check.matches.none=No suggestions for ''{0}'' found.
 Editor.spelling.check.matches.okay=The spelling for ''{0}'' appears to be correct.
 # ########################################################################
 # Menu Bar
 # ########################################################################
 Main.menu.file=_File
 Main.menu.edit=_Edit
 Main.menu.insert=_Insert
 Main.menu.format=Forma_t
 Main.menu.definition=_Variable
 Main.menu.view=Vie_w
 Main.menu.help=_Help
 # ########################################################################
 # Detachable Tabs
 # ########################################################################
 # {0} is the application title; {1} is a unique window ID.
 Detach.tab.title={0} - {1}
 # ########################################################################
 # Status Bar
 # ########################################################################
 Main.status.text.offset=offset
 Main.status.line=Line {0} of {1}, ${Main.status.text.offset} {2}
 Main.status.state.default=OK
 Main.status.export.success=Saved as ''{0}''
 Main.status.error.bootstrap.eval=Note: Bootstrap variable of ''{0}'' not found
 Main.status.error.parse=Evaluation error: {0}
 Main.status.error.def.blank=Move the caret to a word before inserting a variable
 Main.status.error.def.empty=Create a variable before inserting one
 Main.status.error.def.missing=No variable value found for ''{0}''
 Main.status.error.r=Error with [{0}...]: {1}
 Main.status.error.file.missing=Not found: ''{0}''
 Main.status.error.file.missing.near=Not found: ''{0}'' near line {1}
 Main.status.error.messages.recursion=Lookup depth exceeded, check for loops in ''{0}''
 Main.status.error.messages.syntax=Missing ''}'' in ''{0}''
 Main.status.error.undo=Cannot undo; beginning of undo history reached
 Main.status.error.redo=Cannot redo; end of redo history reached
 Main.status.error.theme.missing=Install themes before exporting (no themes found at ''{0}'')
 Main.status.error.theme.name=Cannot find theme name for ''{0}''
 Main.status.image.request.init=Initializing HTTP request
 Main.status.image.request.fetch=Downloaded image ''{0}''
 Main.status.image.request.success=Determined content type ''{0}''
 Main.status.image.request.error.media=No media type for ''{0}''
 Main.status.image.request.error.cert=Could not accept certificate for ''{0}''
 Main.status.image.xhtml.image.download=Downloading ''{0}''
 Main.status.image.xhtml.image.resolve=Qualify path for ''{0}''
 Main.status.image.xhtml.image.found=Found image ''{0}''
 Main.status.image.xhtml.image.missing=Missing image ''{0}''
 Main.status.font.search.missing=No font name starting with ''{0}'' was found
 Main.status.export.concat=Concatenating ''{0}''
 Main.status.export.concat.parent=No parent directory found for ''{0}''
 Main.status.export.concat.extension=File name must have an extension ''{0}''
 Main.status.export.concat.io=Could not read from ''{0}''
 Main.status.typeset.create=Creating typesetter
 Main.status.typeset.xhtml=Export document as XHTML
 Main.status.typeset.began=Started typesetting ''{0}''
 Main.status.typeset.failed=Could not generate PDF file
 Main.status.typeset.page=Typesetting page {0} of {1} (pass {2})
 Main.status.typeset.ended.success=Finished typesetting ''{0}'' ({1} elapsed)
 Main.status.typeset.ended.failure=Failed to typeset ''{0}'' ({1} elapsed)
 Main.status.lexicon.loading=Loading lexicon: {0} words
 Main.status.lexicon.loaded=Loaded lexicon: {0} words
 # ########################################################################
 # Search Bar
 # ########################################################################
 Main.search.stop.tooltip=Close search bar
 Main.search.stop.icon=CLOSE
 Main.search.next.tooltip=Find next match
 Main.search.next.icon=CHEVRON_DOWN
 Main.search.prev.tooltip=Find previous match
 Main.search.prev.icon=CHEVRON_UP
 Main.search.find.tooltip=Search document for text
 Main.search.find.icon=SEARCH
 Main.search.match.none=No matches
 Main.search.match.some={0} of {1} matches
 # ########################################################################
 # Definition Pane and its Tree View
 # ########################################################################
 Definition.menu.add.default=Undefined
 # ########################################################################
 # Variable Definitions Pane
 # ########################################################################
 Pane.definition.node.root.title=Variables
 # ########################################################################
 # HTML Preview Pane
 # ########################################################################
 Pane.preview.title=Preview
 # ########################################################################
 # Document Outline Pane
 # ########################################################################
 Pane.outline.title=Outline
 # ########################################################################
 # File Manager Pane
 # ########################################################################
 Pane.files.title=Files
 # ########################################################################
 # Document Outline Pane
 # ########################################################################
 Pane.statistics.title=Statistics
 # ########################################################################
 # Failure messages with respect to YAML files.
 # ########################################################################
 yaml.error.open=Could not open YAML file (ensure non-empty file).
 yaml.error.unresolvable=Too much indirection for: ''{0}'' = ''{1}''.
 yaml.error.missing=Empty variable value for key ''{0}''.
 yaml.error.tree.form=Unassigned variable near ''{0}''.
 # ########################################################################
 # Text Resource
 # ########################################################################
 TextResource.load.error.unsaved=The file ''{0}'' is unsaved or does not exist.
 TextResource.load.error.permissions=The file ''{0}'' must be readable and writable.
 TextResource.saveFailed.message=Failed to save ''{0}''.\n\nReason: {1}
 TextResource.saveFailed.title=Save
 # ########################################################################
 # File Open
 # ########################################################################
 Dialog.file.choose.open.title=Open File
 Dialog.file.choose.save.title=Save File
 Dialog.file.choose.export.title=Export File
 Dialog.file.choose.import.title=Import File
 Dialog.file.choose.filter.title.source=Source Files
 Dialog.file.choose.filter.title.definition=Variable Files
 Dialog.file.choose.filter.title.xml=XML Files
 Dialog.file.choose.filter.title.all=All Files
 # ########################################################################
 # Browse File
 # ########################################################################
 BrowseFileButton.chooser.title=Open local file
 BrowseFileButton.chooser.allFilesFilter=All Files
 BrowseFileButton.tooltip=${BrowseFileButton.chooser.title}
 # ########################################################################
 # Browse Directory
 # ########################################################################
 BrowseDirectoryButton.chooser.title=Open local directory
 BrowseDirectoryButton.tooltip=${BrowseDirectoryButton.chooser.title}
 # ########################################################################
 # Alert Dialog
 # ########################################################################
 Alert.file.close.title=Close
 Alert.file.close.text=Save changes to {0}?
 # ########################################################################
 # Typesetter Installation Wizard
 # ########################################################################
 Wizard.typesetter.name=ConTeXt
 Wizard.typesetter.container.name=Podman
 Wizard.typesetter.container.version=4.3.1
 Wizard.typesetter.container.checksum=b741702663234ca36e1555149721580dc31ae76985d50c022a8641c6db2f5b93
 Wizard.typesetter.themes.version=1.8.2
 Wizard.typesetter.themes.checksum=00e0f46ea2cb4a812a4780b61a838ea94d78167c1abc9e16767401914a5e989d
 # STEP 1: Introduction panel (all)
 Wizard.typesetter.all.1.install.title=Install typesetting system
 Wizard.typesetter.all.1.install.header=Install typesetting system
 Wizard.typesetter.all.1.install.about.container.link.lbl=${Wizard.typesetter.container.name}
 Wizard.typesetter.all.1.install.about.container.link.url=https://podman.io
 Wizard.typesetter.all.1.install.about.text.1=manages the container for the extensive
 Wizard.typesetter.all.1.install.about.typesetter.link.lbl=${Wizard.typesetter.name}
 Wizard.typesetter.all.1.install.about.typesetter.link.url=https://contextgarden.net
 Wizard.typesetter.all.1.install.about.text.2=\
   typesetting software, which generates PDF files. This wizard\n\
   will guide you through the installation process. After each\n\
   step, you'll be prompted to click a button. Click Next to begin.
 # STEP 2: Install container manager (Unix)
 # Append steps to keep numbers stable; sorted programmatically.
 Wizard.typesetter.unix.2.install.container.header=Install ${Wizard.typesetter.container.name} for Linux / macOS / Unix
 # Copy button states
 Wizard.typesetter.unix.2.install.container.copy.began=Copy
 Wizard.typesetter.unix.2.install.container.copy.ended=Copied
 Wizard.typesetter.unix.2.install.container.os=Operating System
 Wizard.typesetter.unix.2.install.container.step.0=Complete the following steps to install ${Wizard.typesetter.container.name}:
 Wizard.typesetter.unix.2.install.container.step.1=\t1. Select this computer's ${Wizard.typesetter.unix.2.install.container.os}.
 Wizard.typesetter.unix.2.install.container.step.2=\t2. Open a new terminal.
 Wizard.typesetter.unix.2.install.container.step.3=\t3. Run the commands provided below in the terminal.
 Wizard.typesetter.unix.2.install.container.step.4=\t4. Click Next to continue.
 Wizard.typesetter.unix.2.install.container.details.prefix=See
 Wizard.typesetter.unix.2.install.container.details.link.lbl=${Wizard.typesetter.container.name}'s instructions
 Wizard.typesetter.unix.2.install.container.details.link.url=https://podman.io/getting-started/installation
 Wizard.typesetter.unix.2.install.container.details.suffix=for more details.
 Wizard.typesetter.unix.2.install.container.command.distros=14
 Wizard.typesetter.unix.2.install.container.command.os.name.01=Arch Linux & Manjaro Linux
 Wizard.typesetter.unix.2.install.container.command.os.text.01=sudo pacman -S podman
 Wizard.typesetter.unix.2.install.container.command.os.name.02=Alpine Linux
 Wizard.typesetter.unix.2.install.container.command.os.text.02=sudo apk add podman
 Wizard.typesetter.unix.2.install.container.command.os.name.03=CentOS
 Wizard.typesetter.unix.2.install.container.command.os.text.03=sudo yum -y install podman
 Wizard.typesetter.unix.2.install.container.command.os.name.04=Debian
 Wizard.typesetter.unix.2.install.container.command.os.text.04=sudo apt-get -y install podman
 Wizard.typesetter.unix.2.install.container.command.os.name.05=Fedora
 Wizard.typesetter.unix.2.install.container.command.os.text.05=sudo dnf -y install podman
 Wizard.typesetter.unix.2.install.container.command.os.name.06=Gentoo
 Wizard.typesetter.unix.2.install.container.command.os.text.06=sudo emerge app-containers/podman
 Wizard.typesetter.unix.2.install.container.command.os.name.07=OpenEmbedded
 Wizard.typesetter.unix.2.install.container.command.os.text.07=bitbake podman
 Wizard.typesetter.unix.2.install.container.command.os.name.08=openSUSE
 Wizard.typesetter.unix.2.install.container.command.os.text.08=sudo zypper install podman
 Wizard.typesetter.unix.2.install.container.command.os.name.09=RHEL7
 Wizard.typesetter.unix.2.install.container.command.os.text.09=\
   sudo subscription-manager repos \
     --enable=rhel-7-server-extras-rpms\n\
   sudo yum -y install podman
 Wizard.typesetter.unix.2.install.container.command.os.name.10=RHEL8
 Wizard.typesetter.unix.2.install.container.command.os.text.10=\
   sudo yum module enable -y container-tools:rhel8\n\
   sudo yum module install -y container-tools:rhel8
 Wizard.typesetter.unix.2.install.container.command.os.name.11=Ubuntu 20.10+
 Wizard.typesetter.unix.2.install.container.command.os.text.11=\
   sudo apt-get -y update\n\
   sudo apt-get -y install podman
 Wizard.typesetter.unix.2.install.container.command.os.name.12=Linuxmint
 Wizard.typesetter.unix.2.install.container.command.os.text.12=${Wizard.typesetter.unix.2.install.container.command.os.text.11}
 Wizard.typesetter.unix.2.install.container.command.os.name.13=Linuxmint LMDE
 Wizard.typesetter.unix.2.install.container.command.os.text.13=${Wizard.typesetter.unix.2.install.container.command.os.text.04}
 Wizard.typesetter.unix.2.install.container.command.os.name.14=macOS
 Wizard.typesetter.unix.2.install.container.command.os.text.14=\
   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" \n\
   brew install podman
 # STEP 2 a: Download container manager (Windows)
 Wizard.typesetter.win.2.download.container.header=Download ${Wizard.typesetter.container.name} for Windows
 Wizard.typesetter.win.2.download.container.homepage.link.lbl=${Wizard.typesetter.container.name}
 Wizard.typesetter.win.2.download.container.homepage.link.url=https://podman.io
 Wizard.typesetter.win.2.download.container.download.link.lbl=repository
 Wizard.typesetter.win.2.download.container.download.link.url=https://github.com/containers/podman/releases/download/v${Wizard.typesetter.container.version}/podman-${Wizard.typesetter.container.version}-setup.exe
 Wizard.typesetter.win.2.download.container.paths=Downloading {0} into {1}.
 # suppress inspection "UnusedMessageFormatParameter"
 Wizard.typesetter.win.2.download.container.status.bytes=Downloaded {1} bytes (size unknown).
 Wizard.typesetter.win.2.download.container.status.progress=Downloaded {0} % of {1} bytes.
 Wizard.typesetter.win.2.download.container.status.checksum.ok=File {0} exists. Click Next to continue.
 Wizard.typesetter.win.2.download.container.status.checksum.no=Integrity check failed, {0} may be corrupt.
 Wizard.typesetter.win.2.download.container.status.success=Download successful. Click Next to continue.
 Wizard.typesetter.win.2.download.container.status.failure=Download failed. Check network then click Previous to try again.
 # STEP 2 b: Install container manager (Windows)
 Wizard.typesetter.win.2.install.container.header=Install ${Wizard.typesetter.container.name} for Windows
 Wizard.typesetter.win.2.install.container.step.0=Complete the following steps to install ${Wizard.typesetter.container.name}:
 Wizard.typesetter.win.2.install.container.step.1=\t1. Open the task bar.
 Wizard.typesetter.win.2.install.container.step.2=\t2. Click the shield icon to grant permissions.
 Wizard.typesetter.win.2.install.container.step.3=\t3. Click Yes in the User Account Control dialog to install.
 Wizard.typesetter.win.2.install.container.status.running=Installing ...
 Wizard.typesetter.win.2.install.container.status.success=Installation successful.\nClick Next to continue.
 Wizard.typesetter.win.2.install.container.status.failure=Installation failed with exit code {0}.
 Wizard.typesetter.win.2.install.container.status.unknown=Could not determine installer file type: {0}
 # STEP 2: Install container manager (Universal, undetected operating system)
 Wizard.typesetter.all.2.install.container.header=Install ${Wizard.typesetter.container.name}
 Wizard.typesetter.all.2.install.container.homepage.lbl=${Wizard.typesetter.container.name}
 Wizard.typesetter.all.2.install.container.homepage.url=https://podman.io
 # STEP 3: Initialize container manager (all except Linux)
 Wizard.typesetter.all.3.install.container.header=Initialize ${Wizard.typesetter.container.name}
 Wizard.typesetter.all.3.install.container.correct=${Wizard.typesetter.container.name} initialized.\nClick Next to continue.
 Wizard.typesetter.all.3.install.container.missing=Install ${Wizard.typesetter.container.name} before continuing.
 # STEP 4: Install typesetter container image (all)
 Wizard.typesetter.all.4.download.image.header=Download ${Wizard.typesetter.name} image
 Wizard.typesetter.all.4.download.image.correct=Download successful.\nClick Next to continue.
 Wizard.typesetter.all.4.download.image.missing=Install ${Wizard.typesetter.container.name} before continuing.
 # STEP 5: Download typesetter themes (all)
 Wizard.typesetter.all.5.download.themes.header=Download ${Wizard.typesetter.name} themes
 Wizard.typesetter.all.5.download.themes.download.link.lbl=repository
 Wizard.typesetter.all.5.download.themes.download.link.url=https://github.com/DaveJarvis/keenwrite-themes/releases/download/${Wizard.typesetter.themes.version}/theme-pack.zip
 Wizard.typesetter.all.5.download.themes.paths=Downloading {0} into {1}.
 Wizard.typesetter.all.5.download.themes.status.bytes=Downloaded {0} bytes (size unknown).
 Wizard.typesetter.all.5.download.themes.status.progress=Downloaded {0} % of {1} bytes.
 Wizard.typesetter.all.5.download.themes.status.checksum.ok=File {0} exists. Click Finish to continue.
 Wizard.typesetter.all.5.download.themes.status.checksum.no=Integrity check failed, {0} may be corrupt.
 Wizard.typesetter.all.5.download.themes.status.success=Download successful. Click Finish to continue.
 Wizard.typesetter.all.5.download.themes.status.failure=Download failed. Check network then click Previous to try again.
 # ########################################################################
 # Image Dialog
 # ########################################################################
 Dialog.image.title=Image
 Dialog.image.chooser.imagesFilter=Images
 Dialog.image.previewLabel.text=Markdown Preview\:
 Dialog.image.textLabel.text=Alternate Text\:
 Dialog.image.titleLabel.text=Title (tooltip)\:
 Dialog.image.urlLabel.text=Image URL\:
 # ########################################################################
 # Hyperlink Dialog
 # ########################################################################
 Dialog.link.title=Link
 Dialog.link.previewLabel.text=Markdown Preview\:
 Dialog.link.textLabel.text=Link Text\:
 Dialog.link.titleLabel.text=Title (tooltip)\:
 Dialog.link.urlLabel.text=Link URL\:
 # ########################################################################
 # Typesetting Settings Dialog
 # ########################################################################
 Dialog.typesetting.settings.title=Typesetting export settings
 Dialog.typesetting.settings.header.single=Export current document
 Dialog.typesetting.settings.theme=Theme
 Dialog.typesetting.settings.themes.missing=Install themes into {0}.
 Dialog.typesetting.settings.header.multiple=Export multiple documents
 Dialog.typesetting.settings.chapters=Chapters (e.g., 1-3, 5, 7-)
 # ########################################################################
 # About Dialog
 # ########################################################################
 Dialog.about.title=About {0}
 Dialog.about.header={0}
 Dialog.about.content=Copyright 2016-{0} White Magic Software, Ltd.\n\nVersion: {1}
 # ########################################################################
 # Application Actions
 # ########################################################################
 Action.file.new.description=Create a new file
 Action.file.new.accelerator=Shortcut+N
 Action.file.new.icon=FILE_ALT
 Action.file.new.text=_New
 Action.file.open.description=Open a new file
 Action.file.open.accelerator=Shortcut+O
 Action.file.open.text=_Open...
 Action.file.open.icon=FOLDER_OPEN_ALT
 Action.file.close.description=Close the current document
 Action.file.close.accelerator=Shortcut+W
 Action.file.close.text=_Close
 Action.file.close_all.description=Close all open documents
 Action.file.close_all.accelerator=Ctrl+F4
 Action.file.close_all.text=Close All
 Action.file.save.description=Save the document
 Action.file.save.accelerator=Shortcut+S
 Action.file.save.text=_Save
 Action.file.save.icon=FLOPPY_ALT
 Action.file.save_as.description=Rename the current document
 Action.file.save_as.text=Save _As
 Action.file.save_all.description=Save all open documents
 Action.file.save_all.accelerator=Shortcut+Shift+S
 Action.file.save_all.text=Save A_ll
 Action.file.export.pdf.description=Typeset the document
 Action.file.export.pdf.accelerator=Shortcut+P
 Action.file.export.pdf.text=_PDF
 Action.file.export.pdf.icon=FILE_PDF_ALT
 Action.file.export.pdf.dir.description=Typeset files in document directory
 Action.file.export.pdf.dir.accelerator=Shortcut+Shift+P
 Action.file.export.pdf.dir.text=_Joined PDF
 Action.file.export.pdf.dir.icon=FILE_PDF_ALT
 Action.file.export.pdf.repeat.description=Repeat previous typesetting command
 Action.file.export.pdf.repeat.accelerator=Shortcut+Shift+E
 Action.file.export.pdf.repeat.text=_Repeat Export
 Action.file.export.pdf.repeat.icon=FILE_PDF_ALT
 Action.file.export.html_svg.description=Export the current document as HTML + SVG
 Action.file.export.text=_Export As
 Action.file.export.html_svg.text=HTML and S_VG
 Action.file.export.html_tex.description=Export the current document as HTML + TeX
 Action.file.export.html_tex.text=HTML and _TeX
 Action.file.export.xhtml_tex.description=Export as XHTML + TeX
 Action.file.export.xhtml_tex.text=_XHTML and TeX
 Action.file.export.markdown.description=Export the current document as Markdown
 Action.file.export.markdown.text=Markdown
 Action.file.exit.description=Quit the application
 Action.file.exit.text=E_xit
 Action.edit.undo.description=Undo the previous edit
 Action.edit.undo.accelerator=Shortcut+Z
 Action.edit.undo.text=_Undo
 Action.edit.undo.icon=UNDO
 Action.edit.redo.description=Redo the previous edit
 Action.edit.redo.accelerator=Shortcut+Y
 Action.edit.redo.text=_Redo
 Action.edit.redo.icon=REPEAT
 Action.edit.cut.description=Delete the selected text or line
 Action.edit.cut.accelerator=Shortcut+X
 Action.edit.cut.text=Cu_t
 Action.edit.cut.icon=CUT
 Action.edit.copy.description=Copy the selected text
 Action.edit.copy.accelerator=Shortcut+C
 Action.edit.copy.text=_Copy
 Action.edit.copy.icon=COPY
 Action.edit.paste.description=Paste from the clipboard
 Action.edit.paste.accelerator=Shortcut+V
 Action.edit.paste.text=_Paste
 Action.edit.paste.icon=PASTE
 Action.edit.select_all.description=Highlight the current document text
 Action.edit.select_all.accelerator=Shortcut+A
 Action.edit.select_all.text=Select _All
 Action.edit.find.description=Search for text in the document
 Action.edit.find.accelerator=Shortcut+F
 Action.edit.find.text=_Find
 Action.edit.find.icon=SEARCH
 Action.edit.find_next.description=Find next occurrence
 Action.edit.find_next.accelerator=F3
 Action.edit.find_next.text=Find _Next
 Action.edit.find_prev.description=Find previous occurrence
 Action.edit.find_prev.accelerator=Shift+F3
 Action.edit.find_prev.text=Find _Prev
 Action.edit.preferences.description=Edit user preferences
 Action.edit.preferences.accelerator=Ctrl+Alt+S
 Action.edit.preferences.text=_Preferences
 Action.format.bold.description=Insert strong text
 Action.format.bold.accelerator=Shortcut+B
 Action.format.bold.text=_Bold
 Action.format.bold.icon=BOLD
 Action.format.italic.description=Insert text emphasis
 Action.format.italic.accelerator=Shortcut+I
 Action.format.italic.text=_Italic
 Action.format.italic.icon=ITALIC
 Action.format.monospace.description=Insert monospace text
 Action.format.monospace.accelerator=Shortcut+`
 Action.format.monospace.text=_Monospace
 Action.format.superscript.description=Insert superscript text
 Action.format.superscript.accelerator=Shortcut+[
 Action.format.superscript.text=Su_perscript
 Action.format.superscript.icon=SUPERSCRIPT
 Action.format.subscript.description=Insert subscript text
 Action.format.subscript.accelerator=Shortcut+]
 Action.format.subscript.text=Su_bscript
 Action.format.subscript.icon=SUBSCRIPT
 Action.format.strikethrough.description=Insert struck text
 Action.format.strikethrough.accelerator=Shortcut+T
 Action.format.strikethrough.text=Stri_kethrough
 Action.format.strikethrough.icon=STRIKETHROUGH
 Action.insert.blockquote.description=Insert blockquote
 Action.insert.blockquote.accelerator=Ctrl+Q
 Action.insert.blockquote.text=_Blockquote
 Action.insert.blockquote.icon=QUOTE_LEFT
 Action.insert.code.description=Insert inline code
 Action.insert.code.accelerator=Shortcut+K
 Action.insert.code.text=Inline _Code
 Action.insert.code.icon=CODE
 Action.insert.fenced_code_block.description=Insert code block
 Action.insert.fenced_code_block.accelerator=Shortcut+Shift+K
 Action.insert.fenced_code_block.text=_Fenced Code Block
 Action.insert.fenced_code_block.prompt.text=Enter code here
 Action.insert.fenced_code_block.icon=FILE_CODE_ALT
 Action.insert.link.description=Insert hyperlink
 Action.insert.link.accelerator=Shortcut+L
 Action.insert.link.text=_Link...
 Action.insert.link.icon=LINK
 Action.insert.image.description=Insert image
 Action.insert.image.accelerator=Shortcut+G
 Action.insert.image.text=_Image...
 Action.insert.image.icon=PICTURE_ALT
 Action.insert.heading.description=Insert heading level
 Action.insert.heading.accelerator=Shortcut+
 Action.insert.heading.icon=HEADER
 Action.insert.heading_1.description=${Action.insert.heading.description} 1
 Action.insert.heading_1.accelerator=${Action.insert.heading.accelerator}1
 Action.insert.heading_1.text=Heading _1
 Action.insert.heading_1.icon=${Action.insert.heading.icon}
 Action.insert.heading_2.description=${Action.insert.heading.description} 2
 Action.insert.heading_2.accelerator=${Action.insert.heading.accelerator}2
 Action.insert.heading_2.text=Heading _2
 Action.insert.heading_2.icon=${Action.insert.heading.icon}
 Action.insert.heading_3.description=${Action.insert.heading.description} 3
 Action.insert.heading_3.accelerator=${Action.insert.heading.accelerator}3
 Action.insert.heading_3.text=Heading _3
 Action.insert.heading_3.icon=${Action.insert.heading.icon}
 Action.insert.unordered_list.description=Insert bulleted list
 Action.insert.unordered_list.accelerator=Shortcut+U
 Action.insert.unordered_list.text=_Unordered List
 Action.insert.unordered_list.icon=LIST_UL
 Action.insert.ordered_list.description=Insert enumerated list
 Action.insert.ordered_list.accelerator=Shortcut+Shift+O
 Action.insert.ordered_list.text=_Ordered List
 Action.insert.ordered_list.icon=LIST_OL
 Action.insert.horizontal_rule.description=Insert horizontal rule
 Action.insert.horizontal_rule.accelerator=Shortcut+H
 Action.insert.horizontal_rule.text=_Horizontal Rule
 Action.insert.horizontal_rule.icon=LIST_OL
 Action.definition.create.description=Create a new variable
 Action.definition.create.text=_Create
 Action.definition.create.icon=TREE
 Action.definition.create.tooltip=Add new item (Insert)
 Action.definition.rename.description=Rename the selected variable
 Action.definition.rename.text=_Rename
 Action.definition.rename.icon=EDIT
 Action.definition.rename.tooltip=Rename selected item (F2)
 Action.definition.delete.description=Delete the selected variables
 Action.definition.delete.text=De_lete
 Action.definition.delete.icon=TRASH
 Action.definition.delete.tooltip=Delete selected items (Delete)
 Action.definition.insert.description=Insert a variable
 Action.definition.insert.accelerator=Ctrl+Space
 Action.definition.insert.text=_Insert
 Action.definition.insert.icon=STAR
 Action.view.refresh.description=Clear all caches
 Action.view.refresh.accelerator=F5
 Action.view.refresh.text=Refresh
 Action.view.preview.description=Open document preview
 Action.view.preview.accelerator=F6
 Action.view.preview.text=Preview
 Action.view.outline.description=Open document outline
 Action.view.outline.accelerator=F7
 Action.view.outline.text=Outline
 Action.view.statistics.description=Open document word counts
 Action.view.statistics.accelerator=F8
 Action.view.statistics.text=Statistics
 Action.view.files.description=Open file manager
 Action.view.files.accelerator=Ctrl+F8
 Action.view.files.text=Files
 Action.view.menubar.description=Toggle menu bar
 Action.view.menubar.accelerator=Ctrl+F9
 Action.view.menubar.text=Menu bar
 Action.view.toolbar.description=Toggle toolbar
 Action.view.toolbar.accelerator=Ctrl+Shift+F9
 Action.view.toolbar.text=Toolbar
 Action.view.statusbar.description=Toggle status bar
 Action.view.statusbar.accelerator=Ctrl+Shift+Alt+F9
 Action.view.statusbar.text=Status bar
 Action.view.log.description=Open document issues
 Action.view.log.accelerator=F12
 Action.view.log.text=Log
 Action.help.about.description=Show help dialog
 Action.help.about.accelerator=F1
 Action.help.about.text=About
 Action.help.about.icon=INFO

A src/main/resources/com/keenwrite/preview/webview.css

 body,h1,h2,h3,h4,h5,h6,ol,p,ul{margin:0;padding:0}img{max-width:100%;height:auto}table{table-collapse:collapse;table-spacing:0;border-spacing:0}
 /* Do not use points (pt): FlyingSaucer on Debian fails to render. */
 body {
   color: #454545;
   background-color: #fff;
   margin: 0 auto;
   padding: .5em;
   line-height: 1.6;
   font-feature-settings: 'liga' 1;
   font-variant-ligatures: normal;
+}
 body>*:first-child {
   margin-top: 0 !important;
+}
 body>*:last-child {
   margin-bottom: 0 !important;
+}
 #caret {
   background: #fcfeff;
+}
 p, blockquote, ul, ol, dl, table, pre {
   margin: 1em 0;
+}
 /* HEADERS ***/
 h1, h2, h3, h4, h5, h6 {
   font-weight: bold;
   margin: 1em 0 .5em;
+}
 h1 tt, h1 code, h2 tt, h2 code, h3 tt, h3 code,
 h4 tt, h4 code, h5 tt, h5 code, h6 tt, h6 code {
   font-size: inherit;
+}
 h1 {
   font-size: 28px;
+}
 h2 {
   font-size: 24px;
   border-bottom: 1px solid #ccc;
+}
 h3 {
   font-size: 20px;
+}
 h4 {
   font-size: 18px;
+}
 h5 {
   font-size: 16px;
+}
 h6 {
   font-size: 14px;
+}
 h1+p, h2+p, h3+p, h4+p, h5+p, h6+p {
   margin-top: .5em;
+}
 /* LINKS ***/
 a {
   color: #0077aa;
   text-decoration: none;
+}
 a:hover {
   text-decoration: underline;
+}
 /* ITEMIZED LISTS ***/
 ol, ul {
   margin: 0 0 0 2em;
+}
 ol { list-style-type: decimal; }
 ol ol { list-style-type: lower-alpha; }
 ol ol ol { list-style-type: lower-roman; }
 ol ol ol ol { list-style-type: upper-alpha; }
 ol ol ol ol ol { list-style-type: upper-roman; }
 ol ol ol ol ol ol { list-style-type: lower-greek; }
 ul { list-style-type: disc; }
 ul ul { list-style-type: circle; }
 ul ul ul { list-style-type: square; }
 ul ul ul ul { list-style-type: disc; }
 ul ul ul ul ul { list-style-type: circle; }
 ul ul ul ul ul ul { list-style-type: square; }
 /* DEFINITION LISTS ***/
 dl {
   /** Horizontal scroll bar will appear if set to 100%. */
   width: 99%;
   overflow: hidden;
   padding-left: 1em;
+}
 dl dt {
   font-weight: bold;
   float: left;
   width: 20%;
   clear: both;
   position: relative;
+}
 dl dd {
   float: right;
   width: 79%;
   padding-bottom: .5em;
   margin-left: 0;
+}
 /* PREFORMATTED CODE ***/
 pre, code, tt {
   font-family: 'Source Code Pro';
   font-size: 13px;
   background-color: #f8f8f8;
   text-decoration: none;
   white-space: pre-wrap;
   word-wrap: break-word;
   overflow-wrap: anywhere;
   border-radius: .125em;
+}
 code, tt {
   padding: .25em;
+}
 pre > code {
   padding: 0;
   border: none;
   background: transparent;
+}
 pre {
   border: .125em solid #ccc;
   overflow: auto;
   padding: .25em .5em;
+}
 pre code, pre tt {
   background-color: transparent;
   border: none;
+}
 /* BLOCKQUOTES ***/
 blockquote {
   border-left: .25em solid #ccc;
   padding: 0 1em;
   color: #777;
+}
 blockquote>:first-child {
   margin-top: 0;
+}
 blockquote>:last-child {
   margin-bottom: 0;
+}
 /* TABLES ***/
 table {
   width: 100%;
+}
 tr:nth-child(odd) {
   background-color: #eee;
+}
 th {
   background-color: #454545;
   color: #fff;
+}
 th, td {
   text-align: left;
   padding: 0 1em;
+}
 /* IMAGES ***/
 img {
   max-width: 100%;
   /* Tell FlyingSaucer to treat images as block elements.
    * See SvgReplacedElementFactory.
    */
   display: inline-block;
+}
 /* TEX ***/
 /* Tell FlyingSaucer to treat tex elements as nodes.
  * See SvgReplacedElementFactory.
  */
 tex {
   /* Ensure the formulas can be inlined with text. */
   display: inline-block;
+}
 /* Without a robust typesetting engine, there's no
  * nice-looking way to automatically typeset equations.
  * Sometimes baseline is appropriate, sometimes the
  * descender must be considered, and sometimes vertical
  * alignment to the middle looks best.
  */
 p tex {
   vertical-align: baseline;
+}
 /* RULES ***/
 hr {
   clear: both;
   margin: 1.5em 0 1.5em;
   height: 0;
   overflow: hidden;
   border: none;
   background: transparent;
   border-bottom: .125em solid #ccc;
+}
 /* EMAIL ***/
 div.email {
   padding: 0 1.5em;
   text-align: left;
   text-indent: 0;
   border-style: solid;
   border-width: 0.05em;
   border-radius: .25em;
   background-color: #f8f8f8;
+}
 /* TO DO ***/
 div.todo:before {
   content: "TODO";
   color: #c00;
   font-weight: bold;
   display: block;
   width: 100%;
   text-align: center;
   padding: 0;
   margin: 0;
+}
 div.todo {
   border-color: #c00;
   background-color: #f8f8f8;
+}
 div.todo, div.terminal {
   padding: .5em;
   padding-top: .25em;
   padding-bottom: .25em;
   border-style: solid;
   border-width: 0.05em;
   border-radius: .25em;
+}
 /* TERMINAL ***/
 div.terminal {
   font-family: 'Source Code Pro';
   font-size: 90%;
   border-color: #222;
+}
 /* SPEECH BUBBLE ***/
 div.bubblerx, div.bubbletx {
   display: table;
   padding: .5em;
   padding-top: .25em;
   padding-bottom: .25em;
   margin: 1em;
   position: relative;
   border-radius: .25em;
   background-color: #ccc;
   font-family: 'OpenSansEmoji', sans-serif;
   font-size: 95%;
+}
 /* Transmit bubble on the right. */
 div.bubbletx {
   margin-left: auto;
+}
 div.bubblerx:after, div.bubbletx:after {
   content: "";
   position: absolute;
   width: 0;
   height: 0;
   top: .5em;
   border-top: 1em solid transparent;
   border-bottom: 1em solid transparent;
+}
 div.bubblerx::after {
   left: -1em;
   right: auto;
   border-right: 1em solid #ccc;
   border-left: none;
+}
 div.bubbletx:after {
   right: -1em;
   border-left: 1em solid #ccc;
+}
 /* LYRICS ***/
 div.lyrics p {
   margin: 0;
   padding: 0;
   white-space: pre-line;
   font-style: italic;
+}
 div.lyrics:first-line p {
   line-height: 0;
+}

A src/main/resources/com/keenwrite/preview/webview_ja-Jpan-JP.css

 body {
   font-family: 'Noto Serif CJK JP';
+}
 pre, code, tt {
   font-family: 'Noto Sans Mono CJK JP';
+}

A src/main/resources/com/keenwrite/preview/webview_ko-Kore-KR.css

 body {
   font-family: 'Noto Serif CJK KR';
+}
 pre, code, tt {
   font-family: 'Noto Sans Mono CJK KR';
+}

A src/main/resources/com/keenwrite/preview/webview_zh-Hans-CN.css

 body {
   font-family: 'Noto Serif CJK SC';
+}
 pre, code, tt {
   font-family: 'Noto Sans Mono CJK SC';
+}

A src/main/resources/com/keenwrite/preview/webview_zh-Hans-SG.css

 body {
   font-family: 'Noto Serif CJK SC';
+}
 pre, code, tt {
   font-family: 'Noto Sans Mono CJK SC';
+}

A src/main/resources/com/keenwrite/preview/webview_zh-Hant-HK.css

 body {
   font-family: 'Noto Serif CJK SC';
+}
 pre, code, tt {
   font-family: 'Noto Sans Mono CJK HK';
+}

A src/main/resources/com/keenwrite/preview/webview_zh-Hant-TW.css

 body {
   font-family: 'Noto Serif CJK TC';
+}
 pre, code, tt {
   font-family: 'Noto Sans Mono CJK TC';
+}

A src/main/resources/com/keenwrite/settings.properties

 # suppress inspection "UnusedProperty" for whole file
 # ########################################################################
 # Application
 # ########################################################################
 application.title=keenwrite
 application.package=com/${application.title}
 application.messages= com.${application.title}.messages
 # Suppress multiple file modified notifications for one logical modification.
 # Given in milliseconds.
 application.watchdog.timeout=50
 # ########################################################################
 # Preferences
 # ########################################################################
 preferences.root=com.${application.title}
 preferences.root.state=state
 preferences.root.options=options
 preferences.root.definition.source=definition.source
 # ########################################################################
 # File and Path References
 # ########################################################################
 file.stylesheet.application.dir=${application.package}/skins
 file.stylesheet.application.base=${file.stylesheet.application.dir}/scene.css
 file.stylesheet.application.skin=${file.stylesheet.application.dir}/{0}.css
 file.stylesheet.markdown=${application.package}/editor/markdown.css
 # {0} language code, {1} script code, {2} country code
 file.stylesheet.markdown.locale=${application.package}/editor/markdown_{0}-{1}-{2}.css
 file.stylesheet.xml=${application.package}/xml.css
 # Preview styles are loaded statically through a class's classloader.
 file.stylesheet.preview=webview.css
 # {0} language code, {1} script code, {2} country code
 file.stylesheet.preview.locale=webview_{0}-{1}-{2}.css
 file.logo.16=${application.package}/logo16.png
 file.logo.32=${application.package}/logo32.png
 file.logo.128=${application.package}/logo128.png
 file.logo.256=${application.package}/logo256.png
 file.logo.512=${application.package}/logo512.png
 # Default file name when a new file is created.
 # This ensures that the file type can always be
 # discerned so that the correct type of variable
 # reference can be inserted.
 file.default.document=untitled.md
 file.default.definition=variables.yaml
 # Default file name to be replaced by the most
 # recently exported file name.
 file.default.pdf=untitled.pdf
 # ########################################################################
 # File name Extensions
 # ########################################################################
 # Comma-separated list of definition file name extensions.
 definition.file.ext.json=*.json
 definition.file.ext.toml=*.toml
 definition.file.ext.yaml=*.yml,*.yaml
 definition.file.ext.properties=*.properties,*.props
 # Comma-separated list of file name extensions.
 file.ext.rmarkdown=*.Rmd
 file.ext.rxml=*.Rxml
 file.ext.source=*.md,*.markdown,*.mkdown,*.mdown,*.mkdn,*.mkd,*.mdwn,*.mdtxt,*.mdtext,*.text,*.txt,${file.ext.rmarkdown},${file.ext.rxml}
 file.ext.definition=${definition.file.ext.yaml}
 file.ext.xml=*.xml,${file.ext.rxml}
 file.ext.all=*.*
 # File name extension search order for images.
 file.ext.image.order=svg pdf png jpg tiff
 # ########################################################################
 # Variable Name Editor
 # ########################################################################
 # Maximum number of characters for a variable name. A variable is defined
 # as one or more non-whitespace characters up to this maximum length.
 editor.variable.maxLength=256
 # ########################################################################
 # Dialog Preferences
 # ########################################################################
 dialog.alert.button.order.mac=L_HE+U+FBIX_NCYOA_R
 dialog.alert.button.order.linux=L_HE+UNYACBXIO_R
 dialog.alert.button.order.windows=L_E+U+FBXI_YNOCAH_R
 # Ensures a consistent button order for alert dialogs across platforms (because
 # the default button order on Linux defies all logic).
 dialog.alert.button.order=${dialog.alert.button.order.windows}

A src/main/resources/com/keenwrite/skins/count_darcula.css

 .root {
   -fx-base: rgb( 43, 43, 43 );
   -fx-background: -fx-base;
   -fx-control-inner-background: -fx-base;
   -fx-light-text-color: rgb( 187, 187, 187 );
   -fx-mid-text-color: derive( -fx-base, 100% );
   -fx-dark-text-color: derive( -fx-base, 25% );
   -fx-text-foreground: -fx-light-text-color;
   -fx-text-background: derive( -fx-control-inner-background, 7.5% );
   -fx-text-selection: derive( -fx-control-inner-background, 45% );
   /* Make controls ( buttons, thumb, etc. ) slightly lighter */
   -fx-color: derive( -fx-base, 20% );
+}
 .caret {
   -fx-stroke: -fx-accent;
+}
 .glyph-icon {
   -fx-text-fill: -fx-light-text-color;
   -fx-fill: -fx-light-text-color;
+}
 .glyph-icon:hover {
   -fx-effect: dropshadow( three-pass-box, rgba( 0, 0, 0, 0.2 ), 4, 0, 0, 0 );
+}
 /* Fix derived prompt color for text fields */
 .text-input {
   -fx-prompt-text-fill: derive( -fx-control-inner-background, +50% );
+}
 /* Keep prompt invisible when focused ( above color fix overrides it ) */
 .text-input:focused {
   -fx-prompt-text-fill: transparent;
+}
 /* Fix scroll bar buttons arrows colors */
 .scroll-bar > .increment-button > .increment-arrow,
 .scroll-bar > .decrement-button > .decrement-arrow {
   -fx-background-color: -fx-mark-highlight-color,  -fx-light-text-color;
+}
 .scroll-bar > .increment-button:hover > .increment-arrow,
 .scroll-bar > .decrement-button:hover > .decrement-arrow {
   -fx-background-color: -fx-mark-highlight-color, rgb( 240, 240, 240 );
+}
 .scroll-bar > .increment-button:pressed > .increment-arrow,
 .scroll-bar > .decrement-button:pressed > .decrement-arrow {
   -fx-background-color: -fx-mark-highlight-color, rgb( 255, 255, 255 );
+}

A src/main/resources/com/keenwrite/skins/haunted_grey.css

 /* https://stackoverflow.com/a/58441758/59087
  */
 .root {
   -fx-accent: #1e74c6;
   -fx-focus-color: -fx-accent;
   -fx-base: #373e43;
   -fx-control-inner-background: derive( -fx-base, 35% );
   -fx-control-inner-background-alt: -fx-control-inner-background;
   -fx-light-text-color: derive( -fx-base, 150% );
   -fx-mid-text-color: derive( -fx-base, 100% );
   -fx-dark-text-color: derive( -fx-base, 25% );
   -fx-text-foreground: -fx-light-text-color;
   -fx-text-background: derive( -fx-control-inner-background, 7.5% );
   -fx-text-selection: derive( -fx-control-inner-background, 45% );
+}
 .glyph-icon {
   -fx-text-fill: -fx-light-text-color;
   -fx-fill: -fx-light-text-color;
+}
 .glyph-icon:hover {
   -fx-effect: dropshadow( three-pass-box, rgba( 0, 0, 0, 0.2 ), 4, 0, 0, 0 );
+}
 .label {
   -fx-text-fill: -fx-light-text-color;
+}
 .text-field {
   -fx-prompt-text-fill: gray;
+}
 .button {
   -fx-focus-traversable: false;
+}
 .button:hover {
   -fx-text-fill: white;
+}
 .separator *.line {
   -fx-background-color: #3C3C3C;
   -fx-border-style: solid;
   -fx-border-width: 1px;
+}
 .scroll-bar {
   -fx-background-color: derive( -fx-base, 45% );
+}
 .button:default {
   -fx-base: -fx-accent;
+}
 .table-view {
   -fx-selection-bar-non-focused: derive( -fx-base, 50% );
+}
 .table-view .column-header .label {
   -fx-alignment: CENTER_LEFT;
   -fx-font-weight: none;
+}
 .list-cell:even,
 .list-cell:odd,
 .table-row-cell:even,
 .table-row-cell:odd {
   -fx-control-inner-background: derive( -fx-base, 15% );
+}
 .list-cell:empty,
 .table-row-cell:empty {
   -fx-background-color: transparent;
+}
 .list-cell,
 .table-row-cell {
   -fx-border-color: transparent;
   -fx-table-cell-border-color: transparent;
+}
 /* Avoid clipping text descenders in statistics table row. */
 .table-row-cell {
   -fx-cell-size: 30px;
+}

A src/main/resources/com/keenwrite/skins/modena_dark.css

 /* https://github.com/joffrey-bion/javafx-themes/blob/master/css/modena_dark.css
  */
 .root {
   -fx-base: rgb( 50, 50, 50 );
   -fx-background: -fx-base;
   /* Make controls ( buttons, thumb, etc. ) slightly lighter */
   -fx-color: derive( -fx-base, 10% );
   /* Text fields and table rows background */
   -fx-control-inner-background: rgb( 20, 20, 20 );
   /* Version of -fx-control-inner-background for alternative rows */
   -fx-control-inner-background-alt: derive( -fx-control-inner-background, 2.5% );
   /* Text colors depending on background's brightness */
   -fx-light-text-color: rgb( 220, 220, 220 );
   -fx-mid-text-color: rgb( 100, 100, 100 );
   -fx-dark-text-color: rgb( 20, 20, 20 );
   -fx-text-foreground: -fx-light-text-color;
   -fx-text-background: derive( -fx-control-inner-background, 7.5% );
   -fx-text-selection: derive( -fx-control-inner-background, 45% );
   /* A bright blue for highlighting/accenting objects.  For example: selected
    * text; selected items in menus, lists, trees, and tables; progress bars */
   -fx-accent: rgb( 0, 80, 100 );
   /* Color of non-focused yet selected elements */
   -fx-selection-bar-non-focused: rgb( 50, 50, 50 );
+}
 .glyph-icon {
   -fx-text-fill: -fx-light-text-color;
   -fx-fill: -fx-light-text-color;
+}
 .glyph-icon:hover {
   -fx-effect: dropshadow( three-pass-box, rgba( 0, 0, 0, 0.2 ), 4, 0, 0, 0 );
+}
 /* Fix derived prompt color for text fields */
 .text-input {
   -fx-prompt-text-fill: derive( -fx-control-inner-background, +50% );
+}
 /* Keep prompt invisible when focused ( above color fix overrides it ) */
 .text-input:focused {
   -fx-prompt-text-fill: transparent;
+}
 /* Fix scroll bar buttons arrows colors */
 .scroll-bar > .increment-button > .increment-arrow,
 .scroll-bar > .decrement-button > .decrement-arrow {
   -fx-background-color: -fx-mark-highlight-color, rgb( 220, 220, 220 );
+}
 .scroll-bar > .increment-button:hover > .increment-arrow,
 .scroll-bar > .decrement-button:hover > .decrement-arrow {
   -fx-background-color: -fx-mark-highlight-color, rgb( 240, 240, 240 );
+}
 .scroll-bar > .increment-button:pressed > .increment-arrow,
 .scroll-bar > .decrement-button:pressed > .decrement-arrow {
   -fx-background-color: -fx-mark-highlight-color, rgb( 255, 255, 255 );
+}

A src/main/resources/com/keenwrite/skins/modena_light.css

 .root {
   -fx-text-foreground: -fx-dark-text-color;
   -fx-text-background: derive( -fx-accent, 124% );
   -fx-text-selection: #a6d2ff;
+}

A src/main/resources/com/keenwrite/skins/monokai.css

 /*
  * Theme contributed by mery6299
+ *
  * https://github.com/mery6299
  */
 .root {
   -fx-accent: #75715E;
   -fx-focus-color: -fx-accent;
   -fx-base: #262626;
   -fx-control-inner-background: -fx-base;
   -fx-control-inner-background-alt: -fx-control-inner-background;
   -theme-text-selection: #78dce8;
   -theme-search-selection: #ffd866;
   -fx-light-text-color: derive( -fx-base, 150% );
   -fx-mid-text-color: derive( -fx-base, 100% );
   -fx-dark-text-color: derive( -fx-base, 25% );
   -fx-text-foreground: -fx-light-text-color;
   -fx-text-background: derive( -fx-control-inner-background, 25% );
   -fx-text-selection: derive( -theme-text-selection, -50% );
+}
 /* Caret colour */
 .styled-text-area .caret {
   -fx-stroke: white;
+}
 /* Spelling errors */
 .markdown .spelling {
   -rtfx-underline-color: #fc9867;
+}
 /* Search result */
 .markdown .search {
   -rtfx-background-color: derive( -theme-search-selection, -25% );
+}
 .glyph-icon {
   -fx-text-fill: -fx-light-text-color;
   -fx-fill: -fx-light-text-color;
+}
 .glyph-icon:hover {
   -fx-effect: dropshadow( three-pass-box, rgba( 0, 0, 0, 0.2 ), 4, 0, 0, 0 );
+}
 .label {
   -fx-text-fill: -fx-light-text-color;
+}
 .text-field {
   -fx-prompt-text-fill: gray;
+}
 .button {
   -fx-focus-traversable: false;
+}
 .button:hover {
   -fx-text-fill: white;
+}
 .separator *.line {
   -fx-background-color: #3C3C3C;
   -fx-border-style: solid;
   -fx-border-width: 1px;
+}
 .scroll-bar {
   -fx-background-color: derive( -fx-base, 15% );
+}
 .button:default {
   -fx-base: derive( -fx-accent, -25% );
+}
 .table-view {
   -fx-selection-bar-non-focused: derive( -fx-base, 50% );
+}
 .table-view .column-header .label {
   -fx-alignment: CENTER_LEFT;
   -fx-font-weight: none;
+}
 .list-cell:even,
 .list-cell:odd,
 .table-row-cell:even,
 .table-row-cell:odd {
   -fx-control-inner-background: derive( -fx-base, 15% );
+}
 .list-cell:empty,
 .table-row-cell:empty {
   -fx-background-color: transparent;
+}
 .list-cell,
 .table-row-cell {
   -fx-border-color: transparent;
   -fx-table-cell-border-color: transparent;
+}
 /* Avoid clipping text descenders in statistics table row. */
 .table-row-cell {
   -fx-cell-size: 30px;
+}
 /* Toolbar */
 .tool-bar .button:hover {
   -fx-background-color: derive( -fx-accent, -25% );
   -fx-color: -fx-hover-base;
+}
 /* Tabs */
 .tab-pane *.tab-header-background {
 	-fx-background-color: -fx-base;
+}
 .tab:selected {
 	-fx-background-color: derive( #A9DC76, -30% );
+}

A src/main/resources/com/keenwrite/skins/scene.css

 /*
  * Copyright (c) 2015 Karl Tauber <karl at jformdesigner dot com>
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
+ *
  *  o Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
+ *
  *  o Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 .tool-bar {
   -fx-spacing: 0;
+}
 .tool-bar .button {
   -fx-background-color: transparent;
+}
 .tool-bar .button:hover {
   -fx-background-color: -fx-shadow-highlight-color, -fx-outer-border, -fx-inner-border, -fx-body-color;
   -fx-color: -fx-hover-base;
+}
 .tool-bar .button:armed {
   -fx-color: -fx-pressed-base;
+}
 /* Definition editor drag and drop target.
  */
 .drop-target {
   -fx-border-color: #eea82f;
   -fx-border-width: 0 0 2 0;
   -fx-padding: 3 3 1 3
+}

A src/main/resources/com/keenwrite/skins/silver_cavern.css

 /* https://toedter.com/2011/10/26/java-fx-2-0-css-styling/
  */
 .root {
   -fx-base: rgb( 50, 50, 50 );
   -fx-background: -fx-base;
   -fx-control-inner-background: -fx-base;
   -fx-light-text-color: derive( -fx-base, 150% );
   -fx-mid-text-color: derive( -fx-base, 100% );
   -fx-dark-text-color: derive( -fx-base, 25% );
   -fx-text-foreground: -fx-light-text-color;
   -fx-text-background: derive( -fx-control-inner-background, 7.5% );
   -fx-text-selection: derive( -fx-control-inner-background, 45% );
+}
 .glyph-icon {
   -fx-text-fill: -fx-light-text-color;
   -fx-fill: -fx-light-text-color;
+}
 .glyph-icon:hover {
   -fx-effect: dropshadow( three-pass-box, rgba( 0, 0, 0, 0.2 ), 4, 0, 0, 0 );
+}
 .tab {
   -fx-background-color: linear-gradient( to top, -fx-base, derive( -fx-base, 30% ) );
+}
 .menu-bar {
   -fx-background-color: linear-gradient( to bottom, -fx-base, derive( -fx-base, 30% ) );
+}
 .tool-bar:horizontal {
   -fx-background-color: linear-gradient( to bottom, derive( -fx-base, +50% ), derive( -fx-base, -40% ), derive( -fx-base, -20% ) );
+}
 .button {
   -fx-background-color: transparent;
+}
 .button:hover {
   -fx-background-color: -fx-shadow-highlight-color, -fx-outer-border, -fx-inner-border, -fx-body-color;
   -fx-color: -fx-hover-base;
+}
 .table-view {
   -fx-table-cell-border-color:derive( -fx-base, +10% );
   -fx-table-header-border-color:derive( -fx-base, +20% );
+}
 .split-pane:horizontal > * > .split-pane-divider {
   -fx-border-color: transparent -fx-base transparent -fx-base;
   -fx-background-color: transparent, derive( -fx-base, 20% );
   -fx-background-insets: 0, 0 1 0 1;
+}
 .separator-label {
   -fx-text-fill: orange;
+}

A src/main/resources/com/keenwrite/skins/solarized_dark.css

 /* https://ethanschoonover.com/solarized
  */
 .root {
   /* Solarized: base03 */
   -fx-base: rgb( 0, 43, 54 );
   -fx-background: -fx-base;
   /* Brighten controls */
   -fx-color: derive( -fx-base, -40% );
   -fx-control-inner-background: -fx-base;
   -fx-control-inner-background-alt: derive( -fx-control-inner-background, 2.5% );
   /* Text colors */
   /* Solarized: base0 */
   -fx-light-text-color: rgb( 131, 148, 150 );
   -fx-mid-text-color: derive( -fx-light-text-color, 50% );
   -fx-dark-text-color: derive( -fx-light-text-color, 25% );
   -fx-text-foreground: -fx-light-text-color;
   -fx-text-background: derive( -fx-control-inner-background, 7.5% );
   -fx-text-selection: derive( -fx-control-inner-background, 45% );
   -fx-mid-text-color: derive( -fx-base, 100% );
   -fx-dark-text-color: derive( -fx-base, 25% );
   -fx-text-foreground: -fx-light-text-color;
   -fx-text-background: derive( -fx-control-inner-background, 7.5% );
   -fx-text-selection: derive( -fx-control-inner-background, 45% );
   /* Accent colors */
   -fx-accent: rgb( 38, 139, 210 );
   -fx-focus-color: rgb( 253, 246, 227 );
   /* Non-focused-selected elements */
   -fx-selection-bar-non-focused: rgb( 0, 43, 54 );
+}
 .glyph-icon {
   -fx-text-fill: -fx-light-text-color;
   -fx-fill: -fx-light-text-color;
+}
 .glyph-icon:hover {
   -fx-effect: dropshadow( three-pass-box, rgba( 0, 0, 0, 0.2 ), 4, 0, 0, 0 );
+}
 .scroll-bar {
   -fx-background-color: derive( -fx-base, 45% );
+}
 .caret {
   -fx-stroke: -fx-accent;
+}

A src/main/resources/com/keenwrite/skins/vampire_byte.css

 /* https://github.com/Col-E/Recaf/blob/master/src/main/resources/style/ui-dark.css
  */
 .root {
   -fx-base: rgb( 45, 45, 46 );
   -fx-background: -fx-base;
   /* Brighten controls */
   -fx-color: derive( -fx-base, -40% );
   /* Control background */
   -fx-control-inner-background: rgb( 46, 46, 47 );
   /* Alternative control background ( rows ) */
   -fx-control-inner-background-alt: derive( -fx-control-inner-background, 2.5% );
   /* Text colors */
   -fx-light-text-color: rgb( 220, 220, 220 );
   -fx-mid-text-color: rgb( 100, 100, 100 );
   -fx-dark-text-color: rgb( 20, 20, 20 );
   -fx-text-foreground: -fx-light-text-color;
   -fx-text-background: derive( -fx-control-inner-background, 7.5% );
   -fx-text-selection: derive( -fx-control-inner-background, 45% );
   /* Accent colors */
   -fx-accent: rgb( 51, 51, 52 );
   -fx-focus-color: rgb( 51, 51, 52 );
   /* Non-focused-selected elements */
   -fx-selection-bar-non-focused: rgb( 45, 45, 46 );
+}
 .glyph-icon {
   -fx-text-fill: -fx-light-text-color;
   -fx-fill: -fx-light-text-color;
+}
 .glyph-icon:hover {
   -fx-effect: dropshadow( three-pass-box, rgba( 0, 0, 0, 0.2 ), 4, 0, 0, 0 );
+}
 * {
   -fx-highlight-fill: rgba( 0, 180, 255, 0.4 );
+}
 /* Scroll */
 .scroll-bar {
   -fx-background-color: rgb( 61,61,62 );
+}
 .scroll-bar .thumb {
   -fx-background-color: rgb( 91,91,92 );
   -fx-background-radius: 0;
+}
 .scroll-bar .thumb:hover,
 .scroll-bar .thumb:pressed {
   -fx-background-color: rgb( 141,141,142 );
+}
 .scroll-bar .increment-button .increment-arrow,
 .scroll-bar .decrement-button .decrement-arrow {
   -fx-background-color: rgb( 200,200,200 );
+}
 .corner {
   -fx-background-color: rgb( 61,61,62 );
+}
 /* Menu */
 .menu-bar {
   -fx-background-color: rgb( 45, 45, 48 );
+}
 .menu {
   -fx-padding: 6 14 6 14;
   -fx-background-insets: -1;
+}
 .menu-item {
   -fx-padding: 5 11 5 11;
   -fx-background-insets: -1;
+}
 .menu:hover {
   -fx-background-color: rgb( 61, 61, 62 );
+}
 .context-menu,
 .menu:showing {
   -fx-background-color: rgb( 27, 27, 28 );
   -fx-border-insets: -1;
   -fx-border-width: 1;
   -fx-border-color: black;
+}
 .context-menu {
   -fx-min-width: 80px;
   -fx-background-insets: -1;
   -fx-border-insets: -1;
   -fx-border-width: 1;
   -fx-border-color: black;
+}
 .context-menu .menu-item:focused {
   -fx-background-color: rgb( 61, 61, 62 );
+}
 .context-menu-header {
   /* TODO: Find a way to disable hover coloring on the menu header */
   -fx-opacity: 1.0;
   -fx-background-color: rgb( 24, 50, 95 );
+}
 .context-menu-header .label {
   -fx-opacity: 1.0;
+}
 /* Tabs */
 .tab-pane {
   -fx-tab-min-width: 100px;
+}
 .tab-pane *.tab-header-background {
   -fx-background-color: rgb( 29, 29, 31 );
   -fx-border-width: 0 0 1 0;
   -fx-border-color: black;
+}
 .headers-region {
   -fx-background-color: rgb( 75, 75, 76 );
+}
 .tab {
   -fx-background-color: rgb( 36,36,37 );
   -fx-background-insets: 2 -1 -1 -1;
   -fx-background-radius: 0;
   -fx-padding: 2 2 1 2;
   -fx-border-insets: 0;
   -fx-border-width: 1 1 1 1;
   -fx-border-color: black;
+}
 .tab:selected {
   -fx-background-color: rgb( 45, 45, 46 );
   -fx-background-insets: 2 -1 -1 -1;
   -fx-padding: 2;
   -fx-border-insets: 0;
   -fx-border-width: 1 1 0 1;
   -fx-border-color: black;
+}
 .tab:selected .focus-indicator {
   -fx-border-color: transparent;
+}
 /* Table */
 .table-view {
   -fx-selection-bar: rgb( 50, 71, 77 );
   -fx-selection-bar-non-focused: rgb( 46, 56, 59 );
   -fx-background-color: rgb( 36,36,37 );
   -fx-background-insets: 2 -1 -1 -1;
   -fx-background-radius: 0;
   -fx-padding: -1;
   -fx-border-width: 0 1 1 1;
   -fx-border-color: rgb( 22, 22, 23 );
+}
 .table-view .filler,
 .table-view .show-hide-columns-button,
 .column-overlay {
   -fx-background-color: transparent;
+}
 .column-header-background {
   -fx-background-color: rgb( 36,36,37 );
   -fx-background-insets: 2 -1 -1 -1;
   -fx-padding: -1;
   -fx-border-insets: 0;
   -fx-border-width: 0 1 0 1;
   -fx-border-color: rgb( 22, 22, 23 );
+}
 .column-header {
   -fx-background-color: rgb( 45, 45, 46 );
   -fx-background-insets: -1 -0 -1 0;
   -fx-padding: 2;
   -fx-border-insets: 1 -1 1 0;
   -fx-border-width: 1;
   -fx-border-color: rgb( 22, 22, 23 );
+}
 /* Splitpane */
 .split-pane-divider {
   -fx-background-color: black;
   -fx-padding: 0;
   -fx-background-insets: -5;
+}
 /* Tree */
 .tree-table-view,
 .tree-view {
   -fx-background-color: rgb( 29, 29, 31 );
   -fx-background-insets: 0;
   -fx-border-width: 0 1 0 0;
   -fx-border-color: black;
+}
 .tree-table-cell,
 .tree-cell {
   -fx-background-color: rgb( 29, 29, 31 );
+}
 .tree-cell:selected {
   -fx-background-color: rgb( 44, 48, 55 );
+}
 /* Buttons */
 .box,
 .button,
 .combo-box,
 .slider .thumb {
   -fx-background-radius: 0;
   -fx-background-color: rgb( 63, 63, 70 );
   -fx-background-insets: 0;
   -fx-border-width: 1;
   -fx-border-color: rgb( 85, 85, 85 );
+}
 .check-box:hover .box,
 .button:hover,
 .combo-box:hover,
 .slider .thumb:hover {
   -fx-background-color: rgb( 80, 80, 85 );
   -fx-border-color: rgb( 0, 122, 205 );
+}
 .check-box:pressed .box,
 .button:pressed,
 .combo-box:pressed,
 .slider .thumb:pressed {
   -fx-background-color: rgb( 0, 122, 205 );
   -fx-border-color: rgb( 0, 162, 245 );
+}
 .combo-box:showing {
   -fx-background-color: rgb( 27, 27, 28 );
   -fx-border-width: 1 1 0 1;
   -fx-border-color: black;
+}
 .combo-box .combo-box-popup .list-cell {
   -fx-background-color: rgb( 27, 27, 28 );
+}
 .combo-box .combo-box-popup .list-cell:hover {
   -fx-background-color: rgb( 61, 61, 62 );
+}
 .combo-box .combo-box-popup .list-view {
   -fx-background-color: rgb( 27, 27, 28 );
   -fx-border-width: 0 1 1 1;
   -fx-border-color: black;
+}
 .hyperlink {
   -fx-text-fill: rgb( 30, 132, 250 );
+}
 hyperlink:visited {
   -fx-text-fill: rgb( 98, 59, 217 );
+}
 /* slider */
 .slider .track {
   -fx-background-radius: 0;
   -fx-background-color: rgb( 29, 29, 31 );
   -fx-background-insets: 0;
   -fx-border-width: 1;
   -fx-border-color: rgb( 65, 65, 65 );
+}
 .slider .thumb {
   -fx-padding: 5;
+}
 .axis-tick-mark {
   -fx-stroke: rgb( 100, 100, 100 );
+}
 /* Text */
 .text-area .content,
 .text-field {
   -fx-background-radius: 0;
   -fx-background-color: rgb( 63, 63, 70 );
   -fx-background-insets: 0;
   -fx-border-width: 1;
   -fx-border-color: rgb( 85, 85, 85 );
+}
 .text-area {
   -fx-background-radius: 0;
   -fx-background-color: rgb( 63, 63, 70 );
   -fx-background-insets: 0;
   -fx-border-width: 1;
   -fx-border-color: rgb( 85, 85, 85 );
+}
 .text-area .content {
   -fx-border-width: 0;
+}
 /* Popup */
 .tooltip {
   -fx-background-radius: 0;
   -fx-background-color: rgb( 40, 40, 42 );
   -fx-background-insets: 0;
   -fx-border-width: 1;
   -fx-border-color: rgb( 70, 70, 72 );
+}

A src/main/resources/com/keenwrite/ui/fonts/icons/3g2.svg

<svg height="64" width="84" xmlns="http://www.w3.org/2000/svg"><path d="M.238 64h83.524V0H.238zm16.16-4.91H6.41V52h9.988zm30.688 0h-9.988V52h9.988zM67.602 4.363h9.988v7.274h-9.988zm0 47.453h9.988v7.094h-9.988zM52.168 4.363h9.805v7.09h-9.985v-7.09zm0 47.453h9.805v7.094h-9.985zM36.914 4.363h9.988v7.09h-9.988zM35.464 22l13.071 7.453c2.363 1.457 2.363 3.637 0 5.094L35.465 42c-2.363 1.453-4.36.184-4.36-2.547v-15.09c0-2.547 1.997-3.816 4.36-2.363zM21.485 4.363h9.805v7.09h-9.805zm0 47.453h9.805v7.094h-9.805zM6.41 4.363h9.988v7.274H6.41zm0 0" fill="#f60"/></svg>

A src/main/resources/com/keenwrite/ui/fonts/icons/3ga.svg

<svg height="64" width="57" xmlns="http://www.w3.org/2000/svg"><path d="M49.766 32.992c-5.68-2.187-12.278.547-14.66 6.196-2.2 5.652.55 12.21 6.23 14.582 1.102.546 2.383.73 3.668.73 6.414.18 11.726-4.742 11.726-10.938V0c-.363 0-.546.184-.914.184-12.464 3.46-24.742 7.105-37.207 10.57-1.097.363-1.097.91-1.097 1.824V43.2c-.918-.367-1.285-.547-2.016-.73-4.582-1.64-8.617-.73-11.914 2.55-3.3 3.098-4.215 7.84-2.383 12.032 2.383 5.648 8.98 8.383 14.66 6.195 4.22-1.82 6.965-5.832 6.965-10.387V24.426c0-1.278.367-1.64 1.653-2.008 6.046-1.64 12.093-3.461 18.328-5.102l8.797-2.55v18.953c-.918-.364-1.286-.547-1.836-.727zm0 0" fill="#039"/></svg>

A src/main/resources/com/keenwrite/ui/fonts/icons/3gp.svg

<svg height="64" width="84" xmlns="http://www.w3.org/2000/svg"><path d="M.238 64h83.524V0H.238zm16.16-4.91H6.41V52h9.988zm30.688 0h-9.988V52h9.988zM67.602 4.363h9.988v7.274h-9.988zm0 47.453h9.988v7.094h-9.988zM52.168 4.363h9.805v7.09h-9.985v-7.09zm0 47.453h9.805v7.094h-9.985zM36.914 4.363h9.988v7.09h-9.988zM35.464 22l13.071 7.453c2.363 1.457 2.363 3.637 0 5.094L35.465 42c-2.363 1.453-4.36.184-4.36-2.547v-15.09c0-2.547 1.997-3.816 4.36-2.363zM21.485 4.363h9.805v7.09h-9.805zm0 47.453h9.805v7.094h-9.805zM6.41 4.363h9.988v7.274H6.41zm0 0" fill="#f60"/></svg>

A src/main/resources/com/keenwrite/ui/fonts/icons/7z.svg

<svg height="63" width="54" xmlns="http://www.w3.org/2000/svg"><path d="M53.344 18.172H44.02V8.965zM28.309 8.965v33.437h25.199V20.434H41.727V8.964zm3.93-8.723H4.417v6.461h10.965l-6.875 5.332v5.652l10.148-7.753V6.867H54V4.281zM18.655 14.297 8.508 22.05v5.652l10.148-7.754zM8.344 37.559l10.148-7.754v-5.657L8.344 31.902zm10.312 2.261v-5.656L8.508 41.918v2.91h-4.09v6.461h6.219v4.523H7.035c-.652-1.132-1.797-1.937-3.273-1.937C1.637 53.875 0 55.488 0 57.59c0 2.097 1.637 3.715 3.762 3.715 1.476 0 2.62-.809 3.273-1.938h3.602v3.39h5.562v-3.39h3.602c.652 1.13 1.8 1.938 3.273 1.938 2.125 0 3.762-1.618 3.762-3.715 0-2.102-1.637-3.715-3.762-3.715-1.472 0-2.62.805-3.273 1.938h-3.602v-4.524h15.875l21.762-3.879v-2.582H11.78zm0 0" fill="#90c"/></svg>

A src/main/resources/com/keenwrite/ui/fonts/icons/aa.svg

<svg height="64" width="57" xmlns="http://www.w3.org/2000/svg"><path d="M49.766 32.992c-5.68-2.187-12.278.547-14.66 6.196-2.2 5.652.55 12.21 6.23 14.582 1.102.546 2.383.73 3.668.73 6.414.18 11.726-4.742 11.726-10.938V0c-.363 0-.546.184-.914.184-12.464 3.46-24.742 7.105-37.207 10.57-1.097.363-1.097.91-1.097 1.824V43.2c-.918-.367-1.285-.547-2.016-.73-4.582-1.64-8.617-.73-11.914 2.55-3.3 3.098-4.215 7.84-2.383 12.032 2.383 5.648 8.98 8.383 14.66 6.195 4.22-1.82 6.965-5.832 6.965-10.387V24.426c0-1.278.367-1.64 1.653-2.008 6.046-1.64 12.093-3.461 18.328-5.102l8.797-2.55v18.953c-.918-.364-1.286-.547-1.836-.727zm0 0" fill="#039"/></svg>

A src/main/resources/com/keenwrite/ui/fonts/icons/aac.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/ac.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/doc.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/docb.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/docm.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/docx.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/dot.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/dotm.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/dotx.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/download.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/dpj.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/dsn.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/mp3.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/mp4.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/mpa.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/stl.svg

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A src/main/resources/com/keenwrite/ui/fonts/icons/xpi.svg

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A src/main/resources/lexicons/README.md

 # Lexicons
 This directory contains lexicons used for spell checking. Each lexicon
 file contains tab-delimited word-frequency pairs.
 Compiling a high-quality list of correctly spelled words requires the
 following steps:
 . Download a unigram frequency list for all words for a given language.
 . Download a high-quality source list of correctly spelled words.
 . Filter the unigram frequency list using all words in the source list.
 . Sort the filtered list by the frequency in descending order.
 The latter steps can be accomplished as follows:
     # Extract unigram and frequency based on existence in source lexicon.
     for i in $(cat source-lexicon.txt); do
       grep -m 1 "^$i"$'\t' unigram-frequencies.txt;
     done > filtered.txt
     # Sort numerically (-n) using column two (-k2) in reverse order (-r).
     sort -n -k2 -r filtered.txt > en.txt
 There may be more efficient ways to filter the data, which takes a few hours
 to complete (on modern hardware).
 # Resources
 There are numerous sources of word and frequency lists available, including:
 * https://storage.googleapis.com/books/ngrams/books/datasetsv3.html
 * https://github.com/hermitdave/FrequencyWords/
 * https://github.com/neilk/wordfrequencies

A src/main/resources/lexicons/de.txt

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A src/main/resources/lexicons/en.txt

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A src/main/resources/lexicons/es.txt

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A src/main/resources/lexicons/ext/README.md

 # Overview
 Lexicons in this directory are meant to relate to a particular subject
 (medicine, chemistry, math, sports, and such), extend the main lexicon,
 or not be in common use.

A src/main/resources/lexicons/ext/contractions.txt

 'aight
 ain't
 amn't
 aren't
 can't
 'cause
 couldn't
 couldn't've
 could've
 daren't
 daresn't
 dasn't
 didn't
 doesn't
 don't
 dunno
 d'ye
 e'er
 everybody's
 everyone's
 g'day
 gimme
 giv'n
 gonna
 gon't
 gotta
 hadn't
 had've
 hasn't
 haven't
 he'd
 he'll
 he's
 he've
 how'd
 howdy
 how'll
 how're
 how's
 how've
 i'd
 i'dn't've
 i'd've
 i'll
 i'm
 i'm'a
 imma
 innit
 isn't
 it'd
 it'll
 it's
 i've
 let's
 ma'am
 mayn't
 may've
 methinks
 mightn't
 might've
 mustn't
 mustn't've
 must've
 needn't
 ne'er
 o'clock
 o'er
 ol'
 oughtn't
 shalln't
 shan't
 she'd
 she'll
 she's
 shouldn't
 shouldn't've
 should've
 somebody's
 someone's
 something's
 so're
 that'd
 that'll
 that're
 that's
 there'd
 there'll
 there're
 there's
 these'd
 these'll
 these're
 these've
 they'd
 they'll
 they're
 they've
 this's
 those're
 those've
 'tis
 to've
 'twas
 'twouldn't
 wanna
 wasn't
 we'd
 we'd've
 we'll
 we're
 weren't
 we've
 what'd
 what'll
 what're
 what's
 what've
 when'd
 when'll
 when's
 where'd
 where'll
 where're
 where's
 where've
 which'd
 which'll
 which're
 which's
 which've
 who'd
 who'd've
 who'll
 who're
 who's
 who've
 why'd
 why'll
 why're
 why's
 willn't
 won't
 wouldn't
 wouldn't've
 would've
 y'all
 y'all'd've
 y'all're
 you'd
 you'dn't've
 you'll
 you're
 you've

A src/main/resources/lexicons/ext/tech.txt

 analytics	130337
 hotspot	130022
 instantiation	130000
 onboarding	129953
 biometric	129795
 anamorphic	129777
 benchmarking	129772
 cybersecurity	129769
 barcode	129757
 splitter	129755
 keychain	129719
 crowdfunding	129696
 polymorphism	129688
 automata	129666
 shockwave	129658
 profiler	129648
 kerning	129646
 nanometer	129630
 meridiem	129624
 influencer	129618
 passcode	129617
 sexting	129607
 cryptology	129606
 biometrics	129606
 bitcoin	129599
 specular	129598
 accelerometer	129588
 googolplex	129583
 grayscale	129576
 ascender	129571
 pixelated	129569
 rockstar	129565
 ragdoll	129564
 cyberattack	129564
 cryptanalysis	129562
 ransomware	129553
 crowdsourcing	129552
 hackathon	129551
 audiobook	129544
 degauss	129543
 attenuator	129540
 jetpack	129538
 packrat	129536
 backlight	129535
 bootable	129530
 octothorpe	129529
 newsfeed	129525
 extranet	129523
 failover	129516
 cyberbullying	129516
 neumann	129515
 capacitive	129514
 backlit	129511
 millimicron	129507
 inductor	129505
 workgroup	129502
 journaling	129500
 middleware	129499
 spooler	129497
 clamshell	129495
 wireframe	129494
 modularity	129493
 strikethrough	129489
 petabyte	129487
 jughead	129482
 acyclic	129482
 gearhead	129478
 stateful	129473
 submenu	129467
 pseudorandom	129463
 earbuds	129461
 narrowband	129460
 recordable	129457
 unallocated	129455
 mappable	129455
 chipset	129454
 multicast	129447
 loopback	129444
 pixelate	129441
 cryptographic	129441
 pixelation	129438
 autocorrect	129438
 teraflop	129437
 digitizer	129436
 tunnelling	129434
 deduplication	129434
 subwoofer	129433
 touchpad	129429
 namespace	129428
 microcontroller	129428
 geolocation	129428
 telepresence	129427
 driverless	129426
 photolithography	129425
 multiphase	129425
 verifier	129424
 robocall	129424
 autofocus	129424
 kilobit	129422
 hacktivist	129419
 geocache	129415
 rasterize	129412
 plaintext	129411
 pipelining	129411
 technobabble	129409
 defragment	129409
 connectionless	129409
 homomorphic	129407
 demodulator	129406
 datagram	129406
 activex	129406
 normalisation	129404
 blackhole	129402
 cyberstalker	129401
 multifunction	129400
 undirected	129397
 ciphertext	129397
 superspeed	129396
 spacebar	129395
 cyberwar	129395
 borderless	129395
 transcode	129393
 cyberbully	129393
 multimeter	129392
 dropship	129391
 yottabyte	129390
 infector	129390
 superclass	129389
 tooltip	129388
 dereference	129387
 combinator	129386
 milliwatt	129385
 cyberstalking	129384
 subfolder	129383
 wideband	129382
 noncontiguous	129382
 ferroelectric	129382
 cybersquatting	129378
 autofill	129378
 trackpad	129376
 associatively	129376
 luggable	129374
 seamonkey	129373
 defragmentation	129373
 starcraft	129371
 obliquing	129371
 leadless	129371
 greeking	129371
 upgradeable	129370
 radiosity	129370
 transcoding	129369
 quintillionth	129369
 bitmapped	129369
 subdirectory	129368
 degausser	129368
 curtiss	129368
 scunthorpe	129367
 undelete	129365
 gigaflops	129365
 darknet	129365
 zettabyte	129364
 topologies	129363
 spidering	129363
 photorealism	129363
 multithreading	129363
 deallocate	129363
 mersenne	129362
 machinima	129361
 satisfiable	129360
 laserjet	129360
 multicore	129359
 microblog	129359
 megaflops	129359
 homeomorphic	129359
 microblogging	129358
 kilobaud	129358
 cyberwarfare	129358
 microarchitecture	129357
 autosave	129357
 wirelessly	129356
 sneakernet	129355
 textbox	129354
 obfuscator	129354
 microkernel	129353
 substring	129352
 macroinstruction	129352
 endianness	129352
 indexable	129351
 backtick	129351
 unshielded	129350
 cleartext	129350
 autocomplete	129349
 abandonware	129349
 hacktivism	129348
 antikythera	129348
 stereolithography	129347
 photorealistic	129347
 macrovision	129347
 greasemonkey	129347
 geotagging	129347
 disassembler	129346
 spacewar	129345
 pluggable	129345
 kilobits	129345
 webcomic	129344
 unfollow	129344
 photosensor	129344
 petaflop	129344
 garageband	129344
 truetype	129343
 subnetwork	129342
 backpropagation	129342
 supercomputing	129340
 smartwatch	129340
 unbundled	129339
 smilies	129339
 milliamp	129339
 bytecode	129339
 trackpoint	129337
 slipstreaming	129337
 monospace	129337
 memoization	129337
 scaleable	129336
 respawn	129335
 multicasting	129335
 geocacher	129335
 workgroups	129334
 ferrofluid	129334
 smartdrive	129333
 subsampling	129332
 rasterization	129332
 guiltware	129332
 defragger	129332
 satisfiability	129331
 activision	129331
 subdirectories	129330
 segfault	129330
 flamebait	129330
 framebuffer	129329
 defragging	129329
 decompiler	129329
 unshift	129328
 memristor	129328
 zebibyte	129327
 semiprime	129327
 rotoscoping	129327
 hypertransport	129327
 smartmedia	129326
 grayware	129326
 defragmenting	129326
 defragmenter	129326
 repagination	129325
 subnetting	129324
 skeuomorphism	129324
 screencast	129324
 stylesheet	129323
 superintelligence	129322
 multitenancy	129322
 datastore	129322
 autoplay	129322
 repaginate	129321
 macbook	129321
 geotagged	129321
 baudrate	129321
 transmeta	129320
 screwless	129320
 nameserver	129320
 interexchange	129320
 geocoding	129319
 downloader	129319
 autodiscovery	129319
 extortion	65752
 emoji	65684
 googol	65618
 backside	65388
 fibre	65387
 metre	65333
 royale	65173
 radix	65093
 hotdog	65091
 lecher	65062
 uptime	65009
 unbound	64979
 eniac	64975
 synaptic	64966
 voxel	64926
 selfie	64917
 uplink	64887
 fanboy	64857
 defrag	64849
 nondisclosure	64839
 qubit	64828
 yippie	64821
 gearhead	64819
 subnet	64818
 endian	64798
 bezier	64797
 reallocation	64796
 telephonic	64789
 mosfet	64777
 mutex	64775
 inkjet	64772
 gobbing	64768
 shader	64766
 ultralight	64755
 hackers	64746
 pacman	64742
 unlink	64741
 undock	64740
 understroke	64738
 beginners	64736
 photoscope	64731
 gantt	64725
 programmers	64722
 todays	64720
 moores	64716
 fullscreen	64715
 moveless	64708
 reformatted	64704
 deallocate	64704
 laserdisc	64702
 macos	64700
 nonactive	64697
 nonadjacent	64696
 hotfix	64695
 keylogger	64694
 geotag	64691
 oreilly	64681
 exabit	64678
 jailbroken	64677
 fuzzer	64676
 noninteractive	64673
 multifactor	64672
 letterspacing	64671
 preinstall	64669
 multiboot	64666
 runescape	64665
 micropayment	64664
 numpad	64663
 preinstalled	64661
 jailbreaking	64660
 attend	2158
 withstand	1809
 transpire	1116
 reading	1110
 texture	1065
 capitalize	832
 calling	779
 unfold	767
 starboard	679
 commode	625
 doing	594
 textbook	499
 unease	378
 unpack	358
 keycard	231
 mainspring	207
 grr	180
 geocaching	167
 microbus	160
 mp3	147
 svg	139
 shifted	128
 texted	127
 towheaded	118
 mineshaft	115
 nonparty	95
 crossbite	80
 resignedness	69
 msrp	61
 inbreak	53
 nanocomposite	44
 md5	44
 neomorphic	41
 superstrain	28
 lifers	27
 multination	26
 smartwatch	22
 antilibration	22
 zapf	20
 mp4	20

A src/main/resources/lexicons/fr.txt

Binary file

A src/main/resources/lexicons/he.txt

Binary file

A src/main/resources/lexicons/it.txt

Binary file

A src/main/resources/lexicons/ru.txt

Binary file

A src/main/resources/lexicons/zh.txt

Binary file

A src/test/java/com/keenwrite/AwaitFxExtension.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite;
 import javafx.embed.swing.JFXPanel;
 import org.junit.jupiter.api.extension.BeforeAllCallback;
 import org.junit.jupiter.api.extension.ExtensionContext;
 import org.testfx.osgi.service.TestFx;
 import java.util.concurrent.Semaphore;
 import static javafx.application.Platform.runLater;
 import static javax.swing.SwingUtilities.invokeLater;
 /**
  * Blocks all unit tests until JavaFX is ready.
  */
 public class AwaitFxExtension implements BeforeAllCallback {
   /**
    * Prevent {@link RuntimeException} for internal graphics not initialized yet.
+   *
    * @param context Provided by the {@link TestFx} framework.
    * @throws InterruptedException Could not acquire semaphore.
    */
   @Override
   public void beforeAll( final ExtensionContext context )
     throws InterruptedException {
     final var semaphore = new Semaphore( 0 );
     invokeLater( () -> {
       // Prepare JavaFX toolkit and environment.
       new JFXPanel();
       runLater( semaphore::release );
     } );
     semaphore.acquire();
+  }
+}

A src/test/java/com/keenwrite/definition/TreeViewTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.definition;
 import com.keenwrite.editors.definition.DefinitionEditor;
 import com.keenwrite.editors.definition.yaml.YamlTreeTransformer;
 import com.keenwrite.editors.markdown.MarkdownEditor;
 import com.keenwrite.preferences.Workspace;
 import com.keenwrite.preview.HtmlPreview;
 import com.panemu.tiwulfx.control.dock.DetachableTabPane;
 import javafx.application.Application;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.event.Event;
 import javafx.event.EventHandler;
 import javafx.scene.Node;
 import javafx.scene.Scene;
 import javafx.scene.control.ColorPicker;
 import javafx.scene.control.SplitPane;
 import javafx.scene.control.Tooltip;
 import javafx.scene.control.TreeItem;
 import javafx.stage.Stage;
 import org.assertj.core.util.Files;
 import org.testfx.framework.junit5.Start;
 import static com.keenwrite.util.FontLoader.initFonts;
 public class TreeViewTest extends Application {
   private final SimpleObjectProperty<Node> mTextEditor =
     new SimpleObjectProperty<>();
   private final EventHandler<TreeItem.TreeModificationEvent<Event>> mTreeHandler =
     event -> refresh( mTextEditor.get() );
   private void refresh( final Node node ) {
     throw new RuntimeException( "Derp: " + node );
+  }
   public static void main( final String[] args ) {
     initFonts();
     launch( args );
+  }
   public void start( final Stage stage ) {
     onStart( stage );
+  }
   @Start
   private void onStart( final Stage stage ) {
     final var workspace = new Workspace();
     final var mainPane = new SplitPane();
     final var transformer = new YamlTreeTransformer();
     final var editor = new DefinitionEditor( transformer );
     final var file = Files.newTemporaryFile();
     final var tabPane1 = new DetachableTabPane();
     tabPane1.addTab( "Editor", editor );
     final var tabPane2 = new DetachableTabPane();
     final var tab21 =
       tabPane2.addTab( "Picker", new ColorPicker() );
     final var tab22 =
       tabPane2.addTab( "Editor", new MarkdownEditor( file, workspace ) );
     tab21.setTooltip( new Tooltip( "Colour Picker" ) );
     tab22.setTooltip( new Tooltip( "Text Editor" ) );
     final var tabPane3 = new DetachableTabPane();
     tabPane3.addTab( "Preview", new HtmlPreview( workspace ) );
     editor.addTreeChangeHandler( mTreeHandler );
     mainPane.getItems().addAll( tabPane1, tabPane2, tabPane3 );
     stage.setScene( new Scene( mainPane ) );
     stage.show();
+  }
+}

A src/test/java/com/keenwrite/editors/markdown/MarkdownEditorTest.java

 package com.keenwrite.editors.markdown;
 import com.keenwrite.AwaitFxExtension;
 import com.keenwrite.preferences.Workspace;
 import org.assertj.core.util.Files;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.testfx.framework.junit5.ApplicationExtension;
 import java.io.File;
 import java.util.regex.Pattern;
 import static java.util.regex.Pattern.compile;
 import static javafx.application.Platform.runLater;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 @ExtendWith( {ApplicationExtension.class, AwaitFxExtension.class} )
 public class MarkdownEditorTest {
   private static final File TEMP_FILE = Files.newTemporaryFile();
   private static final String[] WORDS = new String[]{
     "Italicize",
     "English's",
     "foreign",
     "words",
     "based",
     "on",
     "popularity,",
     "like",
     "_bête_",
     "_noire_",
     "and",
     "_Weltanschauung_",
     "but",
     "not",
     "résumé.",
     "Don't",
     "omit",
     "accented",
     "characters!",
     "Cœlacanthe",
     "L'Haÿ-les-Roses",
     "Mühlfeldstraße",
     "Da̱nx̱a̱laga̱litła̱n",
   };
   private static final String TEXT = String.join( " ", WORDS );
   private static final Pattern REGEX = compile(
     "[^\\p{Mn}\\p{Me}\\p{L}\\p{N}'-]+" );
   /**
    * Test that the {@link MarkdownEditor} can retrieve a word at the caret
    * position, regardless of whether the caret is at the beginning, middle, or
    * end of the word.
    */
   @Test
   public void test_CaretWord_GetISO88591Word_WordSelected() {
     runLater( () -> {
       final var editor = createMarkdownEditor();
       for( int i = 0; i < WORDS.length; i++ ) {
         final var word = WORDS[ i ];
         final var len = word.length();
         final var expected = REGEX.matcher( word ).replaceAll( "" );
         for( int j = 0; j < len; j++ ) {
           editor.moveTo( offset( i ) + j );
           final var actual = editor.getCaretWordText();
           assertEquals( expected, actual );
+        }
+      }
     } );
+  }
   /**
    * Test that the {@link MarkdownEditor} can make a word bold.
    */
   @Test
   public void test_CaretWord_SetWordBold_WordIsBold() {
     final var index = 20;
     final var editor = createMarkdownEditor();
     editor.moveTo( offset( index ) );
     editor.bold();
     assertTrue( editor.getText().contains( "**" + WORDS[ index ] + "**" ) );
+  }
   /**
    * Returns the document offset for a string at the given index.
    */
   private static int offset( final int index ) {
     assert 0 <= index && index < WORDS.length;
     int offset = 0;
     for( int i = 0; i < index; i++ ) {
       offset += WORDS[ i ].length();
+    }
     // Add the index to compensate for one space between words.
     return offset + index;
+  }
   /**
    * Returns an instance of {@link MarkdownEditor} pre-populated with
    * {@link #TEXT}.
+   *
    * @return A new {@link MarkdownEditor} instance, ready for unit tests.
    */
   private MarkdownEditor createMarkdownEditor() {
     final var workspace = new Workspace();
     final var editor = new MarkdownEditor( TEMP_FILE, workspace );
     editor.setText( TEXT );
     return editor;
+  }
+}

A src/test/java/com/keenwrite/flexmark/ParserTest.java

 /* Copyright 2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.flexmark;
 import com.keenwrite.processors.markdown.extensions.fences.FencedDivExtension;
 import com.vladsch.flexmark.ext.definition.DefinitionExtension;
 import com.vladsch.flexmark.ext.gfm.strikethrough.StrikethroughSubscriptExtension;
 import com.vladsch.flexmark.ext.superscript.SuperscriptExtension;
 import com.vladsch.flexmark.ext.tables.TablesExtension;
 import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.parser.Parser;
 import com.vladsch.flexmark.util.data.MutableDataSet;
 import com.vladsch.flexmark.util.misc.Extension;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Stream;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 /**
  * Test that basic styles for conversion exports as expected.
  */
 public class ParserTest {
   @ParameterizedTest
   @MethodSource( "markdownParameters" )
   void test_Conversion_Markdown_Html( final String md, final String expected ) {
     final var extensions = createExtensions();
     final var options = new MutableDataSet();
     final var parser = Parser
       .builder( options )
       .extensions( extensions )
       .build();
     final var renderer = HtmlRenderer
       .builder( options )
       .extensions( extensions )
       .build();
     final var document = parser.parse( md );
     final var actual = renderer.render( document );
     assertEquals( expected, actual );
+  }
   private List<Extension> createExtensions() {
     final var extensions = new ArrayList<Extension>();
     extensions.add( DefinitionExtension.create() );
     extensions.add( StrikethroughSubscriptExtension.create() );
     extensions.add( SuperscriptExtension.create() );
     extensions.add( TablesExtension.create() );
     extensions.add( FencedDivExtension.create() );
     return extensions;
+  }
   private static Stream<Arguments> markdownParameters() {
     return Stream.of(
       Arguments.of(
         "*emphasis* _emphasis_ **strong**",
         "<p><em>emphasis</em> <em>emphasis</em> <strong>strong</strong></p>\n"
       ),
       Arguments.of(
         "the \uD83D\uDC4D emoji",
         "<p>the \uD83D\uDC4D emoji</p>\n"
+      )
     );
+  }
+}

A src/test/java/com/keenwrite/io/FileObjectTest.java

 package com.keenwrite.io;
 import org.apache.commons.vfs2.FileSystemException;
 import org.junit.jupiter.api.Disabled;
 import org.renjin.eval.SessionBuilder;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import static java.io.File.separator;
 import static java.lang.String.format;
 import static java.nio.charset.StandardCharsets.UTF_8;
 /**
  * Tests file resource allocation.
  */
 public class FileObjectTest {
   private static final String TEMP_DIR = System.getProperty( "java.io.tmpdir" );
   /**
    * Test that resources are not exhausted.
    * <p>
    * Disabled because no issue was found and this test thrashes the I/O.
    * </p>
    */
   @Disabled
   void test_Open_MultipleFiles_NoResourcesExpire() throws FileSystemException {
     final var builder = new SessionBuilder();
     final var session = builder.build();
     for( int i = 0; i < 10000; i++ ) {
       final var filename = format( "%s%s%d.txt", TEMP_DIR, separator, i );
       final var fileObject = session
         .getFileSystemManager()
         .resolveFile( filename );
       try(
         final var stream = fileObject.getContent().getOutputStream();
         final var writer = new OutputStreamWriter( stream, UTF_8 ) ) {
         writer.write( "contents" );
       } catch( final IOException e ) {
         throw new FileSystemException( e );
+      }
       fileObject.delete();
+    }
+  }
+}

A src/test/java/com/keenwrite/io/FileWatchServiceTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.Timeout;
 import java.io.File;
 import java.io.IOException;
 import java.util.concurrent.Semaphore;
 import java.util.function.Consumer;
 import static java.io.File.createTempFile;
 import static java.nio.file.Files.write;
 import static java.nio.file.StandardOpenOption.APPEND;
 import static java.nio.file.StandardOpenOption.CREATE;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 /**
  * Responsible for testing that the {@link FileWatchService} fires the
  * expected {@link FileEvent} when the system raises state changes.
  */
 class FileWatchServiceTest {
   /**
    * Test that modifying a file produces a {@link FileEvent}.
+   *
    * @throws IOException          Could not create watcher service.
    * @throws InterruptedException Could not join on watcher service thread.
    */
   @Test
   @Timeout( value = 5, unit = SECONDS )
   void test_SingleFile_Write_Notified() throws
     IOException, InterruptedException {
     final var text = "arbitrary text to write";
     final var file = createTemporaryFile();
     final var service = new FileWatchService( file );
     final var thread = new Thread( service );
     final var semaphor = new Semaphore( 0 );
     final var listener = createListener( f -> {
       semaphor.release();
       assertEquals( file, f );
     } );
     thread.start();
     service.addListener( listener );
     write( file.toPath(), text.getBytes(), CREATE, APPEND );
     semaphor.acquire();
     service.stop();
     thread.join();
+  }
   private FileModifiedListener createListener( final Consumer<File> action ) {
     return fileEvent -> action.accept( fileEvent.getFile() );
+  }
   private File createTemporaryFile() throws IOException {
     final var prefix = getClass().getPackageName();
     final var file = createTempFile( prefix, null, null );
     file.deleteOnExit();
     return file;
+  }
+}

A src/test/java/com/keenwrite/io/MediaTypeSnifferTest.java

 package com.keenwrite.io;
 import org.junit.jupiter.api.Test;
 import java.io.File;
 import static com.keenwrite.io.MediaTypeExtension.valueFrom;
 import static org.apache.commons.io.FilenameUtils.getExtension;
 import static org.junit.jupiter.api.Assertions.*;
 /**
  * Responsible for testing that {@link MediaTypeSniffer} can return the
  * correct IANA-defined {@link MediaType} for known file types.
  */
 class MediaTypeSnifferTest {
   @Test
   void test_Read_KnownFileTypes_MediaTypeReturned()
     throws Exception {
     final var clazz = getClass();
     final var pkgName = clazz.getPackageName();
     final var dir = pkgName.replace( '.', '/' );
     final var urls = clazz.getClassLoader().getResources( dir + "/images" );
     assertTrue( urls.hasMoreElements() );
     while( urls.hasMoreElements() ) {
       final var url = urls.nextElement();
       final var path = new File( url.toURI().getPath() );
       final var files = path.listFiles();
       assertNotNull( files );
       for( final var image : files ) {
         final var media = MediaTypeSniffer.getMediaType( image );
         final var actualExtension = valueFrom( media ).getExtension();
         final var expectedExtension = getExtension( image.toString() );
         assertEquals( expectedExtension, actualExtension );
+      }
+    }
+  }
+}

A src/test/java/com/keenwrite/io/MediaTypeTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import org.junit.jupiter.api.Test;
 import java.util.Map;
 import static com.keenwrite.io.MediaType.*;
 import static com.keenwrite.io.downloads.DownloadManager.open;
 import static org.junit.jupiter.api.Assertions.*;
 /**
  * Test that {@link MediaType} instances can be queried and return reliable
  * results.
  */
 public class MediaTypeTest {
   /**
    * Test that {@link MediaType#equals(String, String)} is case-insensitive.
    */
   @Test
   public void test_Equality_IgnoreCase_Success() {
     final var mediaType = TEXT_PLAIN;
     assertTrue( mediaType.equals( "TeXt", "Plain" ) );
     assertEquals( "text/plain", mediaType.toString() );
+  }
   /**
    * Test that {@link MediaType#fromFilename(String)} can lookup by file name.
    */
   @Test
   public void test_FilenameExtensions_Supported_Success() {
     final var map = Map.of(
       "jpeg", IMAGE_JPEG,
       "png", IMAGE_PNG,
       "svg", IMAGE_SVG_XML,
       "md", TEXT_MARKDOWN,
       "Rmd", TEXT_R_MARKDOWN,
       "txt", TEXT_PLAIN,
       "yml", TEXT_YAML
     );
     map.forEach( ( k, v ) -> assertEquals( v, fromFilename( "f." + k ) ) );
+  }
   /**
    * Test that remote fetches will pull and identify the type of resource
    * based on the HTTP Content-Type header (or shallow decoding).
    */
   @Test
   public void test_HttpRequest_Supported_Success() {
     //@formatter:off
     final var map = Map.of(
        "https://kroki.io/robots.txt", TEXT_PLAIN,
        "https://place-hold.it/300x500", IMAGE_GIF,
        "https://placekitten.com/g/200/300", IMAGE_JPEG,
        "https://upload.wikimedia.org/wikipedia/commons/9/9f/Vimlogo.svg", IMAGE_SVG_XML,
        "https://kroki.io//graphviz/svg/eNpLyUwvSizIUHBXqPZIzcnJ17ULzy_KSanlAgB1EAjQ", IMAGE_SVG_XML
     );
     //@formatter:on
     map.forEach( ( k, v ) -> {
       try( var response = open( k ) ) {
         assertEquals( v, response.getMediaType() );
       } catch( final Exception e ) {
         fail();
+      }
     } );
+  }
+}

A src/test/java/com/keenwrite/io/SysFileTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 class SysFileTest {
   private static final String REG_PATH_PREFIX =
     "%USERPROFILE%";
   private static final String REG_PATH_SUFFIX =
     "\\AppData\\Local\\Microsoft\\WindowsApps;";
   private static final String REG_PATH = REG_PATH_PREFIX + REG_PATH_SUFFIX;
   @Test
   void test_Locate_ExistingExecutable_PathFound() {
     final var command = "ls";
     final var file = new SysFile( command );
     assertTrue( file.canRun() );
     final var located = file.locate();
     assertTrue( located.isPresent() );
     final var path = located.get();
     final var actual = path.toAbsolutePath().toString();
     final var expected = "/usr/bin/" + command;
     assertEquals( expected, actual );
+  }
   @Test
   void test_Parse_RegistryEntry_ValueObtained() {
     final var file = new SysFile( "unused" );
     final var expected = REG_PATH;
     final var actual =
       file.parseRegEntry( "    path    REG_EXPAND_SZ    " + expected );
     assertEquals( expected, actual );
+  }
   @Test
   void test_Expand_RegistryEntry_VariablesExpanded() {
     final var value = "UserProfile";
     final var file = new SysFile( "unused" );
     final var expected = value + REG_PATH_SUFFIX;
     final var actual = file.expand( REG_PATH, s -> value );
     assertEquals( expected, actual );
+  }
+}

A src/test/java/com/keenwrite/io/UserDataDirTest.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io;
 import org.junit.jupiter.api.Test;
 import java.io.FileNotFoundException;
 import static org.junit.jupiter.api.Assertions.*;
 class UserDataDirTest {
   @Test
   void test_Unix_GetAppDirectory_DirectoryExists()
     throws FileNotFoundException {
     final var path = UserDataDir.getAppPath( "test" );
     final var file = path.toFile();
     assertTrue( file.exists() );
     assertTrue( file.delete() );
     assertFalse( file.exists() );
+  }
+}

A src/test/java/com/keenwrite/io/downloads/DownloadManagerTest.java

 /* Copyright 2022 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.io.downloads;
 import org.junit.jupiter.api.Test;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executors;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
 import static com.keenwrite.io.downloads.DownloadManager.ProgressListener;
 import static com.keenwrite.io.downloads.DownloadManager.open;
 import static java.io.OutputStream.nullOutputStream;
 import static java.lang.System.setProperty;
 import static org.junit.jupiter.api.Assertions.*;
 class DownloadManagerTest {
   static {
     // By default, this returns null, which is not a valid user agent.
     setProperty( "http.agent", DownloadManager.class.getCanonicalName() );
+  }
   private static final String SITE = "https://github.com/";
   private static final String URL
     = SITE + "DaveJarvis/keenwrite/releases/latest/download/keenwrite.exe";
   @Test
   void test_Async_DownloadRequested_DownloadCompletes()
     throws IOException, InterruptedException, ExecutionException {
     final var complete = new AtomicInteger();
     final var transferred = new AtomicLong();
     final OutputStream output = nullOutputStream();
     final ProgressListener listener = ( percentage, bytes ) -> {
       complete.set( percentage );
       transferred.set( bytes );
     };
     final var token = open( URL );
     final var executor = Executors.newFixedThreadPool( 1 );
     final var result = token.download( output, listener );
     final var future = executor.submit( result );
     assertFalse( future.isDone() );
     assertTrue( complete.get() < 100 );
     assertTrue( transferred.get() > 100_000 );
     future.get();
     assertEquals( 100, complete.get() );
     token.close();
+  }
+}

A src/test/java/com/keenwrite/preferences/KeyTest.java

 package com.keenwrite.preferences;
 import org.junit.jupiter.api.Test;
 import static com.keenwrite.preferences.Key.key;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 /**
  * Test that {@link Key} hierarchies can be transformed into alternate data
  * models.
  */
 class KeyTest {
   @Test
   public void test_String_ParentHierarchy_DotNotation() {
     final var keyRoot = key( "root" );
     final var keyMeta = key( keyRoot, "meta" );
     final var keyDate = key( keyMeta, "date" );
     final var expected = "root.meta.date";
     final var actual = keyDate.toString();
     assertEquals( expected, actual );
+  }
+}

A src/test/java/com/keenwrite/preview/DiagramUrlGeneratorTest.java

 package com.keenwrite.preview;
 import org.junit.jupiter.api.Test;
 import static com.keenwrite.constants.Constants.DIAGRAM_SERVER_NAME;
 import static com.keenwrite.preview.DiagramUrlGenerator.toUrl;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 /**
  * Responsible for testing that images sent to the diagram server will render.
  */
 class DiagramUrlGeneratorTest {
   // @formatter:off
   private static final String[] DIAGRAMS = new String[]{
     "graphviz",
     "digraph G {Hello->World; World->Hello;}",
     "https://kroki.io/graphviz/svg/eJxLyUwvSizIUHBXqPZIzcnJ17ULzy_KSbFWAFO6dmBB61oAE9kNww==",
     "blockdiag",
     """
       blockdiag {
         Kroki -> generates -> "Block diagrams";
         Kroki -> is -> "very easy!";
         Kroki [color = "greenyellow"];
         "Block diagrams" [color = "pink"];
         "very easy!" [color = "orange"];
+      }
       """,
     "https://kroki.io/blockdiag/svg/eJxdzDEKQjEQhOHeU4zpPYFoYesRxGJ9bwghMSsbUYJ4d10UCZbDfPynolOek0Q8FsDeNCestoisNLmy-Qg7R3Blcm5hPcr0ITdaB6X15fv-_YdJixo2CNHI2lmK3sPRA__RwV5SzV80ZAegJjXSyfMFptc71w=="
   };
   // @formatter:on
   /**
    * Test that URL encoding works with Kroki's server.
    */
   @Test
   public void test_Generation_TextDiagram_UrlEncoded() {
     // Use a map of pairs if this test needs more complexity.
     for( int i = 0; i < DIAGRAMS.length / 3; i += 3 ) {
       final var name = DIAGRAMS[ i ];
       final var text = DIAGRAMS[ i + 1 ];
       final var expected = DIAGRAMS[ i + 2 ];
       final var actual = toUrl( DIAGRAM_SERVER_NAME, name, text );
       assertEquals( expected, actual );
+    }
+  }
+}

A src/test/java/com/keenwrite/processors/html/XhtmlProcessorTest.java

 package com.keenwrite.processors.html;
 import com.keenwrite.ExportFormat;
 import com.keenwrite.editors.common.Caret;
 import com.keenwrite.processors.ProcessorContext;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 import java.io.File;
 import java.nio.file.Path;
 import java.util.HashMap;
 import java.util.stream.Stream;
 import static com.keenwrite.ExportFormat.HTML_TEX_DELIMITED;
 import static com.keenwrite.ExportFormat.XHTML_TEX;
 import static com.keenwrite.processors.ProcessorContext.builder;
 import static com.keenwrite.processors.ProcessorFactory.createProcessors;
 import static java.util.Locale.ENGLISH;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 public class XhtmlProcessorTest {
   /**
    * Contains the thumbs up emoji.
    */
   private static final String EMOJI_MARKDOWN = "the \uD83D\uDC4D emoji";
   @ParameterizedTest
   @MethodSource( "formatParameters" )
   void test_Conversion_EmojiInput_EncodedEmoji(
     final ExportFormat format, final String expected ) {
     final var context = createProcessorContext( format );
     final var processor = createProcessors( context );
     final var actual = processor.apply( EMOJI_MARKDOWN );
     assertEquals( expected, actual );
+  }
   private static ProcessorContext createProcessorContext(
     final ExportFormat format ) {
     final var caret = Caret.builder().build();
     return builder()
       .with( ProcessorContext.Mutator::setExportFormat, format )
       .with( ProcessorContext.Mutator::setSourcePath, Path.of( "f.md" ) )
       .with( ProcessorContext.Mutator::setDefinitions, HashMap::new )
       .with( ProcessorContext.Mutator::setLocale, () -> ENGLISH )
       .with( ProcessorContext.Mutator::setMetadata, HashMap::new )
       .with( ProcessorContext.Mutator::setThemesPath, () -> Path.of( "b" ) )
       .with( ProcessorContext.Mutator::setCaret, () -> caret )
       .with( ProcessorContext.Mutator::setImagesPath, () -> new File( "i" ) )
       .with( ProcessorContext.Mutator::setImageOrder, () -> "" )
       .with( ProcessorContext.Mutator::setImageServer, () -> "" )
       .with( ProcessorContext.Mutator::setSigilBegan, () -> "" )
       .with( ProcessorContext.Mutator::setSigilEnded, () -> "" )
       .with( ProcessorContext.Mutator::setRScript, () -> "" )
       .with( ProcessorContext.Mutator::setRWorkingDir, () -> Path.of( "r" ) )
       .with( ProcessorContext.Mutator::setCurlQuotes, () -> true )
       .with( ProcessorContext.Mutator::setAutoRemove, () -> true )
       .build();
+  }
   private static Stream<Arguments> formatParameters() {
     return Stream.of(
       Arguments.of(
         HTML_TEX_DELIMITED,
         "<p id=\"caret\">the \uD83D\uDC4D emoji</p>\n"
       ),
       Arguments.of(
         XHTML_TEX,
         """
           <html>
             <head>
               <title> </title>
               <meta charset="utf8"/>
               <meta content="2" name="count"/>
             </head>
             <body>
               <p id="caret">the 👍 emoji</p>
           </body>
           </html>
           """
+      )
     );
+  }
+}

A src/test/java/com/keenwrite/processors/markdown/ImageLinkExtensionTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.processors.markdown;
 import com.keenwrite.AwaitFxExtension;
 import com.keenwrite.editors.common.Caret;
 import com.keenwrite.processors.Processor;
 import com.keenwrite.processors.ProcessorContext;
 import com.keenwrite.processors.markdown.extensions.ImageLinkExtension;
 import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.parser.Parser;
 import javafx.stage.Stage;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.testfx.framework.junit5.ApplicationExtension;
 import org.testfx.framework.junit5.Start;
 import java.io.File;
 import java.net.URI;
 import java.net.URL;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import static com.keenwrite.ExportFormat.XHTML_TEX;
 import static com.keenwrite.constants.Constants.DOCUMENT_DEFAULT;
 import static java.lang.String.format;
 import static javafx.application.Platform.runLater;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.testfx.util.WaitForAsyncUtils.waitForFxEvents;
 /**
  * Responsible for testing that linked images render into HTML according to
  * the {@link ImageLinkExtension} rules.
  */
 @ExtendWith( {ApplicationExtension.class, AwaitFxExtension.class} )
 @SuppressWarnings( "SameParameterValue" )
 public class ImageLinkExtensionTest {
   private static final Map<String, String> IMAGES = new HashMap<>();
   private static final String URI_WEB = "placekitten.com/200/200";
   private static final String URI_DIRNAME = "images";
   private static final String URI_FILENAME = "kitten";
   /**
    * Path to use for testing image file name resolution. Note that resources use
    * forward slashes, regardless of OS.
    */
   private static final String URI_PATH = URI_DIRNAME + '/' + URI_FILENAME;
   /**
    * Extension for the first existing image that matches the preferred image
    * extension order.
    */
   private static final String URI_IMAGE_EXT = ".png";
   /**
    * Relative path to an image that exists.
    */
   private static final String URI_IMAGE = URI_PATH + URI_IMAGE_EXT;
   static {
     addUri( URI_PATH + ".png" );
     addUri( URI_PATH + ".jpg" );
     addUri( URI_PATH, getResource( URI_PATH + URI_IMAGE_EXT ) );
     addUri( "//" + URI_WEB );
     addUri( "http://" + URI_WEB );
     addUri( "https://" + URI_WEB );
+  }
   @Start
   @SuppressWarnings( "unused" )
   private void start( final Stage stage ) {
+  }
   private static void addUri( final String actualExpected ) {
     addUri( actualExpected, actualExpected );
+  }
   private static void addUri( final String actual, final String expected ) {
     IMAGES.put( toMd( actual ), toHtml( expected ) );
+  }
   private static String toMd( final String resource ) {
     return format( "![Tooltip](%s 'Title')", resource );
+  }
   private static String toHtml( final String url ) {
     return format(
       "<p><img src=\"%s\" alt=\"Tooltip\" title=\"Title\" /></p>\n", url );
+  }
   /**
    * Test that the key URIs present in the {@link #IMAGES} map are rendered
    * as the value URIs present in the same map.
    */
   @Test
   void test_ImageLookup_RelativePathWithExtension_ResolvedSuccessfully() {
     final var resource = getResourcePath( URI_IMAGE );
     final var imagePath = new File( URI_IMAGE ).toPath();
     final var subpaths = resource.getNameCount() - imagePath.getNameCount();
     final var subpath = resource.subpath( 0, subpaths );
     // The root component isn't considered part of the path, so add it back.
     final var documentPath = Path.of(
       resource.getRoot().resolve( subpath ).toString(),
       DOCUMENT_DEFAULT.getName() );
     final var context = createProcessorContext( documentPath );
     final var extension = ImageLinkExtension.create( context );
     final var extensions = List.of( extension );
     final var pBuilder = Parser.builder();
     final var hBuilder = HtmlRenderer.builder();
     final var parser = pBuilder.extensions( extensions ).build();
     final var renderer = hBuilder.extensions( extensions ).build();
     assertNotNull( parser );
     assertNotNull( renderer );
     for( final var entry : IMAGES.entrySet() ) {
       final var key = entry.getKey();
       final var node = parser.parse( key );
       final var expectedHtml = entry.getValue();
       final var actualHtml = new StringBuilder( 128 );
       runLater( () -> actualHtml.append( renderer.render( node ) ) );
       waitForFxEvents();
       assertEquals( expectedHtml, actualHtml.toString() );
+    }
+  }
   /**
    * Creates a new {@link ProcessorContext} for the given file name path.
+   *
    * @param inputPath Fully qualified path to the file name.
    * @return A context used for creating new {@link Processor} instances.
    */
   private ProcessorContext createProcessorContext( final Path inputPath ) {
     return ProcessorContext
       .builder()
       .with( ProcessorContext.Mutator::setSourcePath, inputPath )
       .with( ProcessorContext.Mutator::setExportFormat, XHTML_TEX )
       .with( ProcessorContext.Mutator::setCaret, () -> Caret.builder().build() )
       .build();
+  }
   private static URL toUrl( final String path ) {
     final var clazz = ImageLinkExtensionTest.class;
     final var packagePath = clazz.getPackageName().replace( '.', '/' );
     final var resourcePath = '/' + packagePath + '/' + path;
     return clazz.getResource( resourcePath );
+  }
   private static URI toUri( final String path ) {
     try {
       return toUrl( path ).toURI();
     } catch( final Exception ex ) {
       throw new RuntimeException( ex );
+    }
+  }
   private static Path getResourcePath( final String path ) {
     return Paths.get( toUri( path ) );
+  }
   private static String getResource( final String path ) {
     return toUri( path ).toString();
+  }
+}

A src/test/java/com/keenwrite/r/PluralizeTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.r;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
 import java.util.Map;
 import static java.lang.String.format;
 import static java.util.Map.entry;
 import static java.util.Map.ofEntries;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 /**
  * Test that English pluralization rules produce expected values.
  */
 public class PluralizeTest {
   private static final ScriptEngine ENGINE =
       new ScriptEngineManager().getEngineByName( "Renjin" );
   private static final Map<String, String> PLURAL_MAP = ofEntries(
       entry( "beef", "beefs" ),
       entry( "brother", "brothers" ),
       entry( "child", "children" ),
       entry( "cow", "cows" ),
       entry( "ephemeris", "ephemerides" ),
       entry( "genie", "genies" ),
       entry( "money", "moneys" ),
       entry( "mongoose", "mongooses" ),
       entry( "mythos", "mythoi" ),
       entry( "octopus", "octopuses" ),
       entry( "ox", "oxen" ),
       entry( "soliloquy", "soliloquies" ),
       entry( "trilby", "trilbys" ),
       entry( "wolf", "wolves" )
   );
   @BeforeAll
   static void setup() throws ScriptException {
     r( "setwd( 'R' );" );
     r( "source( 'pluralize.R' );" );
+  }
   @Test
   @SuppressWarnings("UnnecessaryLocalVariable")
   public void test_Pluralize_SingularForms_PluralForms()
       throws ScriptException {
     for( final var key : PLURAL_MAP.keySet() ) {
       final var expectedSingular = key;
       final var expectedPlural = PLURAL_MAP.get( key );
       final var actualSingular = pluralize( key, 1 );
       final var actualPlural = pluralize( key, 2 );
       assertEquals( expectedSingular, actualSingular );
       assertEquals( expectedPlural, actualPlural );
+    }
+  }
   private String pluralize( final String word, final int count )
       throws ScriptException {
     return r( format( "pluralize( '%s', %d );", word, count ) ).toString();
+  }
   private static Object r( final String code ) throws ScriptException {
     return ENGINE.eval( code );
+  }
+}

A src/test/java/com/keenwrite/richtext/StyleClassedTextAreaTest.java

 package com.keenwrite.richtext;
 import javafx.application.Application;
 import javafx.scene.Scene;
 import javafx.scene.layout.StackPane;
 import javafx.stage.Stage;
 import org.fxmisc.flowless.VirtualizedScrollPane;
 import org.fxmisc.richtext.StyleClassedTextArea;
 import java.net.URISyntaxException;
 /**
  * Scaffolding for creating one-off tests, not run as part of test suite.
  */
 public class StyleClassedTextAreaTest extends Application {
   private final StyleClassedTextArea mTextArea =
     new StyleClassedTextArea( false );
   private final VirtualizedScrollPane<StyleClassedTextArea> mScrollPane =
     new VirtualizedScrollPane<>( mTextArea );
   public static void main( final String[] args ) {
     launch( args );
+  }
   @Override
   public void start( final Stage stage ) throws URISyntaxException {
     final var pane = new StackPane( mScrollPane );
     final var scene = new Scene( pane, 800, 600 );
     final var stylesheets = scene.getStylesheets();
     stylesheets.clear();
     stylesheets.add( getStylesheet( "skins/scene.css" ) );
     stylesheets.add( getStylesheet( "editor/markdown.css" ) );
     stylesheets.add( getStylesheet( "skins/monokai.css" ) );
     mTextArea.getStyleClass().add( "markdown" );
     mTextArea.insertText( 0, TEXT + TEXT + TEXT + TEXT );
     mTextArea.setStyle( "-fx-font-size: 13pt" );
     mTextArea.requestFollowCaret();
     mTextArea.moveTo( 4375 );
     stage.setScene( scene );
     stage.show();
+  }
   private String getStylesheet( final String suffix )
     throws URISyntaxException {
     final var url = getClass().getResource( "/com/keenwrite/" + suffix );
     return url == null ? "" : url.toURI().toString();
+  }
   private static final String TEXT = """
     In my younger and more vulnerable years my father gave me some advice
     that I’ve been turning over in my mind ever since.
     “Whenever you feel like criticizing anyone,” he told me, “just
     remember that all the people in this world haven’t had the advantages
     that you’ve had.”
     He didn’t say any more, but we’ve always been unusually communicative
     in a reserved way, and I understood that he meant a great deal more
     than that. In consequence, I’m inclined to reserve all judgements, a
     habit that has opened up many curious natures to me and also made me
     the victim of not a few veteran bores. The abnormal mind is quick to
     detect and attach itself to this quality when it appears in a normal
     person, and so it came about that in college I was unjustly accused of
     being a politician, because I was privy to the secret griefs of wild,
     unknown men. Most of the confidences were unsought—frequently I have
     feigned sleep, preoccupation, or a hostile levity when I realized by
     some unmistakable sign that an intimate revelation was quivering on
     the horizon; for the intimate revelations of young men, or at least
     the terms in which they express them, are usually plagiaristic and
     marred by obvious suppressions. Reserving judgements is a matter of
     infinite hope. I am still a little afraid of missing something if I
     forget that, as my father snobbishly suggested, and I snobbishly
     repeat, a sense of the fundamental decencies is parcelled out
     unequally at birth.""";
+}

A src/test/java/com/keenwrite/sigils/RKeyOperatorTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.sigils;
 import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 /**
  * Responsible for simulating R variable injection.
  */
 class RKeyOperatorTest {
   /**
    * Test that a key name becomes an R variable.
    */
   @Test
   void test_Process_KeyName_Processed() {
     final var mOperator = new RKeyOperator();
     final var expected = "v$a$b$c$d";
     final var actual = mOperator.apply( "a.b.c.d" );
     assertEquals( expected, actual );
+  }
+}

A src/test/java/com/keenwrite/util/AlphanumComparatorTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import org.junit.jupiter.api.Test;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 /**
  * Responsible for testing the http://www.davekoelle.com/alphanum.html
  * implementation.
  */
 class AlphanumComparatorTest {
   /**
    * Test that a randomly sorted list containing a mix of alphanumeric
    * characters ("chunks") will be sorted according to numeric and alphabetic
    * order.
    */
   @Test
   public void test_Sort_UnsortedList_SortedAlphanumerically() {
     final var expected = Arrays.asList(
       "10X Radonius",
       "20X Radonius",
       "20X Radonius Prime",
       "30X Radonius",
       "40X Radonius",
       "200X Radonius",
       "1000X Radonius Maximus",
       "Allegia 6R Clasteron",
       "Allegia 50 Clasteron",
       "Allegia 50B Clasteron",
       "Allegia 51 Clasteron",
       "Allegia 500 Clasteron",
       "Alpha 2",
       "Alpha 2A",
       "Alpha 2A-900",
       "Alpha 2A-8000",
       "Alpha 100",
       "Alpha 200",
       "Callisto Morphamax",
       "Callisto Morphamax 500",
       "Callisto Morphamax 600",
       "Callisto Morphamax 700",
       "Callisto Morphamax 5000",
       "Callisto Morphamax 6000 SE",
       "Callisto Morphamax 6000 SE2",
       "Callisto Morphamax 7000",
       "Xiph Xlater 5",
       "Xiph Xlater 40",
       "Xiph Xlater 50",
       "Xiph Xlater 58",
       "Xiph Xlater 300",
       "Xiph Xlater 500",
       "Xiph Xlater 2000",
       "Xiph Xlater 5000",
       "Xiph Xlater 10000"
     );
     final var actual = new ArrayList<>( expected );
     Collections.shuffle( actual );
     actual.sort( new AlphanumComparator<>() );
     assertEquals( expected, actual );
+  }
+}

A src/test/java/com/keenwrite/util/CircularQueueTest.java

 package com.keenwrite.util;
 import com.keenwrite.collections.CircularQueue;
 import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 /**
  * Tests the {@link CircularQueue} class.
  */
 public class CircularQueueTest {
   /**
    * Exercises the circularity aspect of the {@link CircularQueue}.
    * Confirms that the elements added can be subsequently overwritten.
    * This also checks that peek and remove functionality work as expected.
    */
   @Test
   public void test_Add_ExceedMaxCapacity_FirstElementOverwritten() {
     final var CAPACITY = 5;
     final var OVERWRITE = 17;
     final var ELEMENTS = CAPACITY + OVERWRITE;
     final var queue = createQueue( CAPACITY, ELEMENTS );
     assertEquals( CAPACITY, queue.size() );
     for( int i = 0; i < CAPACITY; i++ ) {
       final var expected =
         ELEMENTS - ((((OVERWRITE - CAPACITY - 1) - i) % CAPACITY) + 1);
       assertEquals( expected, queue.peek() );
       assertEquals( expected, queue.remove() );
+    }
+  }
   /**
    * Tests iterating over all elements in the {@link CircularQueue}.
    */
   @Test
   public void test_Iterate_FullQueue_AllElementsNavigated() {
     final var CAPACITY = 101;
     final var queue = createQueue( CAPACITY, CAPACITY );
     int actualCount = 0;
     for( final var ignored : queue ) {
       actualCount++;
+    }
     assertEquals( CAPACITY, actualCount );
+  }
   /**
    * Tests iterating over {@link CircularQueue} where some elements,
    * starting at an arbitrary offset, have been removed.
    */
   @Test
   public void test_Iterate_PartialQueue_AllElementsNavigated() {
     final var CAPACITY = 31;
     final var OVERWRITE = CAPACITY / 2;
     final var queue = createQueue( CAPACITY, CAPACITY + OVERWRITE );
     var actualCount = 0;
     for( int i = 0; i < OVERWRITE; i++ ) {
       queue.remove();
+    }
     for( final var ignored : queue ) {
       actualCount++;
+    }
     assertEquals( CAPACITY - OVERWRITE, actualCount );
+  }
   /**
    * Creates a new, pre-populated {@link CircularQueue} instance.
+   *
    * @param capacity The maximum number of elements before overwriting.
    * @param count    The number of elements to pre-populate the queue.
    * @return A new {@link CircularQueue} pre-populated with ascending,
    * consecutive values.
    */
   private static CircularQueue<Integer> createQueue(
     final int capacity, final int count ) {
     final var queue = new CircularQueue<Integer>( capacity );
     for( int i = 0; i < count; i++ ) {
       queue.add( i );
+    }
     return queue;
+  }
+}

A src/test/java/com/keenwrite/util/CyclicIteratorTest.java

 /* Copyright 2020-2021 White Magic Software, Ltd. -- All rights reserved. */
 package com.keenwrite.util;
 import org.junit.jupiter.api.Test;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.NoSuchElementException;
 import static org.junit.jupiter.api.Assertions.*;
 /**
  * Tests the {@link CyclicIterator} class.
  */
 public class CyclicIteratorTest {
   /**
    * Test that the {@link CyclicIterator} can move forwards and backwards
    * through a {@link List}.
    */
   @Test
   public void test_Directions_NextPreviousCycles_Success() {
     final var list = List.of( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 );
     final var iterator = createCyclicIterator( list );
     // Test forwards through the iterator.
     for( int i = 0; i < list.size(); i++ ) {
       assertTrue( iterator.hasNext() );
       assertEquals( i, iterator.next() );
+    }
     // Loop to the first item.
     iterator.next();
     // Test backwards through the iterator.
     for( int i = list.size() - 1; i >= 0; i-- ) {
       assertTrue( iterator.hasPrevious() );
       assertEquals( i, iterator.previous() );
+    }
+  }
   /**
    * Test that the {@link CyclicIterator} returns the last element when
    * the very first API call is to {@link ListIterator#previous()}.
    */
   @Test
   public void test_Direction_FirstPrevious_ReturnsLastElement() {
     final var list = List.of( 1, 2, 3, 4, 5, 6, 7 );
     final var iterator = createCyclicIterator( list );
     assertEquals( iterator.previous(), list.get( list.size() - 1 ) );
+  }
   @Test
   public void test_Empty_Next_Exception() {
     final var iterator = createCyclicIterator( List.of() );
     assertThrows( NoSuchElementException.class, iterator::next );
+  }
   @Test
   public void test_Empty_Previous_Exception() {
     final var iterator = createCyclicIterator( List.of() );
     assertThrows( NoSuchElementException.class, iterator::previous );
+  }
   private <T> CyclicIterator<T> createCyclicIterator( final List<T> list ) {
     return new CyclicIterator<>( list );
+  }
+}

A src/test/java/com/keenwrite/util/RangeValidatorTest.java

 package com.keenwrite.util;
 import org.junit.jupiter.api.Test;
 import static org.junit.jupiter.api.Assertions.*;
 /**
  * Tests that the range format specifiers correctly identify integer values
  * inside and outside the range.
  */
 class RangeValidatorTest {
   @Test
   void test_Validation_SingleRange_Valid() {
     // Arbitrary start and end.
     final var lo = 1;
     final var hi = 5;
     final var validator = new RangeValidator( lo + "-" + hi );
     for( int i = lo; i < hi; i++ ) {
       assertTrue( validator.test( i ) );
+    }
     // Arbitrary bounds checks.
     assertFalse( validator.test( lo - 1 ) );
     assertFalse( validator.test( lo - 11 ) );
     assertFalse( validator.test( hi + 1 ) );
     assertFalse( validator.test( hi + 11 ) );
+  }
   @Test
   void test_Validation_SingleValue_Valid() {
     // Arbitrary.
     final var i = 7;
     final var validator = new RangeValidator( Integer.toString( i ) );
     assertTrue( validator.test( i ) );
+  }
   @Test
   void test_Validation_UnboundedMaxIntegerRange_Valid() {
     // Arbitrary.
     final var lo = 11;
     final var validator = new RangeValidator( lo + "-" );
     // Arbitrary end value.
     for( int i = lo; i < lo + 101; i++ ) {
       assertTrue( validator.test( i ) );
+    }
     assertFalse( validator.test( 10 ) );
+  }
   @Test
   void test_Validation_UnboundedMinIntegerRange_Valid() {
     // Arbitrary.
     final var hi = 5;
     final var validator = new RangeValidator( "-" + hi );
     for( int i = 1; i < hi; i++ ) {
       assertTrue( validator.test( i ) );
+    }
     assertFalse( validator.test( 0 ) );
     assertFalse( validator.test( -1 ) );
+  }
   @Test
   void test_Validation_MultipleRanges_Valid() {
     // Arbitrary.
     final var validator = new RangeValidator( "-5, 7-11, 13, 15-20, 30-" );
     assertTrue( validator.test( 1 ) );
     assertTrue( validator.test( 5 ) );
     assertTrue( validator.test( 7 ) );
     assertTrue( validator.test( 11 ) );
     assertTrue( validator.test( 13 ) );
     assertTrue( validator.test( 15 ) );
     assertTrue( validator.test( 20 ) );
     assertTrue( validator.test( 30 ) );
     assertTrue( validator.test( 101 ) );
     assertFalse( validator.test( -1 ) );
     assertFalse( validator.test( 0 ) );
     assertFalse( validator.test( 6 ) );
     assertFalse( validator.test( 12 ) );
     assertFalse( validator.test( 14 ) );
     assertFalse( validator.test( 21 ) );
     assertFalse( validator.test( 29 ) );
+  }
   @Test
   void test_Validation_EmptyRange_AllValid() {
     final var validator = new RangeValidator( "" );
     assertTrue( validator.test( 0 ) );
     assertTrue( validator.test( 1 ) );
     assertTrue( validator.test( 2 ) );
     assertTrue( validator.test( Integer.MAX_VALUE ) );
+  }
+}

A src/test/resources/com/keenwrite/io/images/example.bmp

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A src/test/resources/com/keenwrite/io/images/example.eps

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A src/test/resources/com/keenwrite/io/images/example.gif

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A src/test/resources/com/keenwrite/io/images/example.jpg

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A src/test/resources/com/keenwrite/io/images/example.png

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A src/test/resources/com/keenwrite/io/images/example.svg

 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 68 34" width="68px" height="34px" fill="#005a9c">
 <desc>W3C</desc>
 <path d="m16.117 1.006 5.759 19.58 5.759-19.58h4.17 11.444v1.946l-5.879 10.128c2.065.663 3.627 1.868 4.686 3.615 1.059 1.748 1.589 3.799 1.589 6.155 0 2.914-.775 5.363-2.324 7.348s-3.555 2.978-6.017 2.978c-1.854 0-3.469-.589-4.845-1.767-1.377-1.178-2.396-2.773-3.058-4.786l3.256-1.35c.477 1.218 1.106 2.178 1.887 2.879.781.702 1.701 1.052 2.76 1.052 1.112 0 2.052-.622 2.82-1.866.768-1.245 1.152-2.74 1.152-4.489 0-1.933-.411-3.429-1.231-4.488-.954-1.244-2.45-1.867-4.489-1.867h-1.588v-1.906l5.56-9.612h-6.712l-.382.65-8.163 27.548h-.397l-5.958-19.937-5.957 19.937h-.397l-9.53-32.168h4.17l5.759 19.58 3.892-13.185-1.906-6.395z"/>
 <path d="m64.92 1.006c-.819 0-1.554.295-2.111.861-.591.6-.92 1.376-.92 2.178s.313 1.545.887 2.128c.583.591 1.334.912 2.145.912.793 0 1.562-.321 2.161-.903.574-.557.887-1.3.887-2.136 0-.811-.321-1.57-.878-2.136-.584-.592-1.344-.904-2.171-.904zm2.643 3.065c0 .701-.271 1.351-.768 1.832-.524.507-1.174.777-1.892.777-.675 0-1.342-.278-1.84-.785s-.777-1.157-.777-1.849.287-1.368.802-1.891c.481-.49 1.131-.751 1.84-.751.726 0 1.376.271 1.883.785.49.489.752 1.147.752 1.882zm-2.559-1.807h-1.3v3.445h.65v-1.469h.642l.701 1.469h.726l-.769-1.57c.498-.102.785-.439.785-.929 0-.625-.472-.946-1.435-.946zm-.118.422c.608 0 .886.169.886.591 0 .405-.278.549-.87.549h-.549v-1.14z"/>
 <path d="m59.807.825.676 4.107-2.391 4.575s-.918-1.941-2.443-3.015c-1.285-.905-2.122-1.102-3.431-.832-1.681.347-3.587 2.357-4.419 4.835-.995 2.965-1.005 4.4-1.04 5.718-.056 2.113.277 3.362.277 3.362s-1.452-2.686-1.438-6.62c.009-2.808.451-5.354 1.75-7.867 1.143-2.209 2.842-3.535 4.35-3.691 1.559-.161 2.791.59 3.743 1.403 1 .854 2.01 2.721 2.01 2.721z"/>
 <path d="m60.102 24.063s-1.057 1.889-1.715 2.617c-.659.728-1.837 2.01-3.292 2.651s-2.218.762-3.656.624c-1.437-.138-2.772-.97-3.24-1.317s-1.664-1.369-2.34-2.322-1.733-2.859-1.733-2.859.589 1.91.958 2.721c.212.467.864 1.894 1.789 3.136.863 1.159 2.539 3.154 5.086 3.604 2.547.451 4.297-.693 4.73-.97s1.346-1.042 1.924-1.66c.603-.645 1.174-1.468 1.49-1.962.231-.36.607-1.092.607-1.092z"/>
 </svg>

A src/test/resources/com/keenwrite/io/images/example.xbm

 #define 1617524430813_width 72
 #define 1617524430813_height 48
 static char 1617524430813_bits[] = {
 xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2C, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0x00, 0x00, 0x52, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 x00, 0x00, 0xA8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1A,
 x10, 0x00, 0x00, 0x00, 0x02, 0x04, 0x00, 0x00, 0xAA, 0x78, 0x80, 0x07,
 xC0, 0xFF, 0x3F, 0xE0, 0x41, 0x44, 0x78, 0x80, 0x0F, 0xC0, 0xFF, 0x3F,
 xF8, 0x67, 0x18, 0xF0, 0x80, 0x07, 0xE0, 0xFF, 0x3F, 0xF8, 0xE7, 0x00,
 xE0, 0x00, 0x0F, 0xE0, 0xFF, 0x1F, 0xFC, 0xFF, 0x00, 0xF0, 0x01, 0x0F,
 xE0, 0x01, 0x1D, 0xFC, 0x7F, 0x00, 0xF0, 0x01, 0x1F, 0xE0, 0x81, 0x0F,
 x3E, 0x7C, 0x00, 0xE0, 0x01, 0x1E, 0xE0, 0x81, 0x07, 0x0E, 0x38, 0x00,
 xE0, 0x01, 0x17, 0xF0, 0xC0, 0x07, 0x0F, 0x30, 0x00, 0xE0, 0x03, 0x3F,
 xF0, 0xC0, 0x03, 0x07, 0x00, 0x00, 0xC0, 0x03, 0x3F, 0xF8, 0xE0, 0x03,
 x07, 0x00, 0x00, 0xC0, 0x83, 0x3F, 0x78, 0xF0, 0x01, 0x07, 0x00, 0x00,
 xC0, 0x83, 0x3F, 0x78, 0xB0, 0x00, 0x03, 0x00, 0x00, 0x80, 0x87, 0x7F,
 x78, 0xF8, 0x03, 0x03, 0x00, 0x00, 0x80, 0x87, 0x7B, 0x78, 0xFC, 0x07,
 x03, 0x00, 0x00, 0x80, 0xCF, 0x7B, 0x3C, 0xF8, 0x0F, 0x03, 0x00, 0x00,
 x80, 0xC7, 0xE3, 0x3E, 0xC8, 0x1F, 0x02, 0x00, 0x00, 0x00, 0xEF, 0xF2,
 x3C, 0x00, 0x1F, 0x02, 0x00, 0x00, 0x00, 0xEF, 0xF1, 0x1C, 0x00, 0x3E,
 x02, 0x00, 0x00, 0x00, 0xEF, 0xB1, 0x1F, 0x00, 0x3C, 0x00, 0x00, 0x00,
 x00, 0xFE, 0xE1, 0x1F, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x00, 0xF6, 0xE0,
 x17, 0x00, 0x7C, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xE0, 0x0F, 0x00, 0x3C,
 x00, 0x00, 0x00, 0x00, 0x7E, 0xC0, 0x0F, 0x00, 0x7C, 0x00, 0x00, 0x00,
 x00, 0xFC, 0xC0, 0x0F, 0x00, 0xFC, 0x00, 0x40, 0x00, 0x00, 0x7C, 0x80,
 x07, 0x03, 0xBC, 0x00, 0x60, 0x00, 0x00, 0x7C, 0xC0, 0xC7, 0x01, 0x3E,
 x03, 0xE0, 0x00, 0x00, 0x18, 0x80, 0xC7, 0x07, 0x1E, 0x03, 0x70, 0x00,
 x00, 0x38, 0x80, 0x82, 0x87, 0x1F, 0x0E, 0x7C, 0x00, 0x00, 0x38, 0x00,
 x03, 0xFF, 0x1D, 0xBC, 0x3F, 0x00, 0x00, 0x30, 0x00, 0x03, 0xFF, 0x0F,
 xFC, 0x1F, 0x00, 0x00, 0x10, 0x00, 0x03, 0xFC, 0x07, 0xF0, 0x1F, 0x00,
 x00, 0x10, 0x00, 0x01, 0xF8, 0x01, 0xE0, 0x07, 0x00, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
   };

A src/test/resources/com/keenwrite/io/images/example_2.bmp

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A src/test/resources/com/keenwrite/io/images/example_2.gif

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A src/test/resources/com/keenwrite/io/images/example_2.jpg

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A src/test/resources/com/keenwrite/io/images/example_2.png

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A src/test/resources/com/keenwrite/io/images/example_256.bmp

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A src/test/resources/com/keenwrite/io/images/example_256.gif

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A src/test/resources/com/keenwrite/io/images/example_256.jpg

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A src/test/resources/com/keenwrite/io/images/example_256.png

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A src/test/resources/com/keenwrite/io/images/example_animation.gif

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A src/test/resources/com/keenwrite/io/images/example_animation.mng

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A src/test/resources/com/keenwrite/io/images/example_gray.bmp

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A src/test/resources/com/keenwrite/io/images/example_gray.gif

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A src/test/resources/com/keenwrite/io/images/example_gray.jpg

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A src/test/resources/com/keenwrite/io/images/example_gray.png

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A src/test/resources/com/keenwrite/processors/markdown/images/kitten.jpg

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A src/test/resources/com/keenwrite/processors/markdown/images/kitten.png

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A src/test/resources/com/keenwrite/processors/markdown/workspace.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <keenwrite>
    <workspace>
       <images>
          <order>svg pdf png jpg tiff</order>
          <dir></dir>
       </images>
    </workspace>
 </keenwrite>

A src/test/sikuli/.gitignore

	1	*.class
1	2

A src/test/sikuli/README.md

 Sikuli is used for the following purposes:
 * Create application videos.
 * Create integration tests.

A src/test/sikuli/demo.sikuli/1594187265140.png

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A src/test/sikuli/demo.sikuli/1594592396134.png

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A src/test/sikuli/demo.sikuli/1594593710440.png

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A src/test/sikuli/demo.sikuli/1594593794335.png

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A src/test/sikuli/demo.sikuli/1594594984108.png

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A src/test/sikuli/demo.sikuli/1594689573764.png

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A src/test/sikuli/demo.sikuli/demo.py

 # -----------------------------------------------------------------------------
 # Copyright 2020 White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be included
 # in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # Runs all scripts
 # -----------------------------------------------------------------------------
 import s01
 import s02
 import s03
 import s04

A src/test/sikuli/demo.sikuli/s01.py

 # -----------------------------------------------------------------------------
 # Copyright 2020 White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be included
 # in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # This script introduces the editor and its purpose.
 # -----------------------------------------------------------------------------
 from sikuli import *
 import sys
 if not "../editor.sikuli" in sys.path:
     sys.path.append( "../editor.sikuli" )
 from editor import *
 # ---------------------------------------------------------------
 # Fresh start
 # ---------------------------------------------------------------
 rm( app_home + "/variables.yaml" )
 rm( app_home + "/untitled.md" )
 rm( dir_home + "/.scrivenvar" )
 # ---------------------------------------------------------------
 # Wait for application to launch
 # ---------------------------------------------------------------
 openApp( "java -jar " + app_bin )
 wait("1594187265140.png", 30)
 # Breathing room for video recording.
 wait( 4 )
 # ---------------------------------------------------------------
 # Introduction
 # ---------------------------------------------------------------
 set_typing_speed( 240 )
 heading( "What is this application?" )
 typer( "Well, this application is a text editor that supports interpolated definitions, ")
 typer( "a few different text formats, real-time preview, spell check ")
 typer( "as you tipe" )
 wait( 0.5 )
 recur( 3, backspace )
 typer( "ype, and R statements." )
 paragraph()
 wait( 1 )
 # ---------------------------------------------------------------
 # Definition demo
 # ---------------------------------------------------------------
 heading( "What are definitions?" )
 typer( "Watch. " )
 wait( .5 )
 # Focus the definition editor.
 click_create()
 recur( 4, tab )
 wait( .5 )
 rename_definition( "application" )
 insert()
 rename_definition( "title" )
 insert()
 rename_definition( "Scrivenvar" )
 # Set focus to the text editor.
 tab()
 typer( "The left-hand pane contains a nested, folder-like structure of names " )
 typer( "and values that are called *definitions*. " )
 wait( .5 )
 typer( "Such definitions can simplify updating documents. " )
 wait( 1 )
 edit_find( "this application" )
 typer( "$application.title$" )
 edit_find_next()
 typer( "$application.title$" )
 type( Key.END, Key.CTRL )
 typer( "The right-hand pane shows the result after having substituted definition " )
 typer( "values into the document." )
 paragraph()
 typer( "Now nobody wants to type definition names all the time. Instead, type any " )
 typer( "partial definition value followed by `Ctrl+Space`, such as: scr" )
 wait( 0.5 )
 autoinsert()
 wait( 1 )
 typer( ". *Much* better!" )
 paragraph()
 heading( "What is interpolation?" )
 typer( "Definition values can reference definition names. " )
 wait( .5 )
 typer( "The definition names act as placeholders. Substituting placeholders with " )
 typer( "their definition value is called *interpolation*. Let's see how it works." )
 wait( 2 )

A src/test/sikuli/demo.sikuli/s02.py

 # -----------------------------------------------------------------------------
 # Copyright 2020 White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be included
 # in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # This script demonstrates how to use interpolated strings.
 # -----------------------------------------------------------------------------
 from sikuli import *
 import sys
 if not "../editor.sikuli" in sys.path:
     sys.path.append( "../editor.sikuli" )
 from editor import *
 # -----------------------------------------------------------------------------
 # Open sample chapter.
 # -----------------------------------------------------------------------------
 file_open()
 type( Key.UP, Key.ALT )
 wait( 1 )
 typer( Key.END )
 wait( 1 )
 enter()
 wait( 0.5 )
 enter()
 wait( 1 )
 # -----------------------------------------------------------------------------
 # Open the corresponding definition file.
 # -----------------------------------------------------------------------------
 file_open()
 recur( 2, down )
 wait( 1 )
 enter()
 wait( 1 )
 # -----------------------------------------------------------------------------
 # Edit the sample document.
 # -----------------------------------------------------------------------------
 set_typing_speed( 80 )
 type( Key.HOME, Key.CTRL )
 recur( 2, down )
 # Grey
 recur( 3, skip_right )
 autoinsert()
 # 34
 recur( 4, skip_right )
 autoinsert()
 # Central
 recur( 10, skip_right )
 autoinsert()
 # London
 skip_right()
 autoinsert()
 # Hatchery
 skip_right()
 autoinsert()
 # and Conditioning
 recur( 2, select_word_right )
 delete()
 # Centre
 skip_right()
 autoinsert()
 set_typing_speed( 220 )
 typer( " Let's interpolate those four definitions instead!" )
 wait( 4 )
 recur( 13, type, Key.BACKSPACE, Key.CTRL )
 recur( 9, backspace )
 set_typing_speed( 60 )
 typer( "name$" )
 wait( 2 )
 # Collapse all definitions
 tab()
 recur( 8, typer, Key.LEFT )
 # Expand to city
 recur( 4, typer, Key.RIGHT )
 # Jump to name
 recur( 2, down )
 recur( 2, typer, Key.RIGHT )
 # Open the text field to show the full value
 typer( Key.F2 )
 # Traverse the text field
 home()
 recur( 16, type, Key.RIGHT, Key.CTRL )
 esc()
 restore_typing_speed()
 tab()
 type( Key.HOME, Key.CTRL )
 edit_find( "Director" )
 autoinsert()
 edit_find_next()
 autoinsert()
 edit_find_next()
 typer( Key.RIGHT )
 recur( 2, delete )
 autoinsert()
 typer( "'s" )
 edit_find( "Hatcheries" )
 autoinsert()
 # and Conditioning
 recur( 2, select_word_right )
 delete()
 edit_find( "Central" )
 autoinsert()
 skip_right()
 autoinsert()
 typer( " How about a different city?" )
 wait( 2 )
 recur( 5, type, Key.BACKSPACE, Key.CTRL )
 wait( 1 )
 tab()
 typer( Key.F2 )
 typer( "Seattle" )
 enter()
 tab()
 wait( 2 )
 type( Key.END, Key.CTRL )
 paragraph()
 typer( "No?" )
 paragraph()
 tab()
 typer( Key.F2 )
 typer( "London" )
 enter()
 tab()
 typer( "Organizing definitions is left to your ")
 typer( "doub" )
 autoinsert()
 typer( " Good imagination." )
 tab()
 # Jump to "char" definition
 home()
 # Jump to "char.a.primary.name" definition
 recur( 6, typer, Key.RIGHT )
 # Jump to "char.a.primary.caste" definition
 down()
 typer( Key.RIGHT )
 # Jump to root-level "caste" definition
 recur( 7, down )
 # Reselect "super"
 recur( 5, typer, Key.RIGHT )
 wait( 2 )
 # Close the window, no save
 type( "w", Key.CTRL )
 wait( 0.5 )
 tab()
 wait( 0.5 )
 typer( Key.SPACE )
 wait( 1 )

A src/test/sikuli/demo.sikuli/s03.py

 # -----------------------------------------------------------------------------
 # Copyright 2020 White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be included
 # in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # This script introduces images and R.
 # -----------------------------------------------------------------------------
 from sikuli import *
 import sys
 if not "../editor.sikuli" in sys.path:
     sys.path.append( "../editor.sikuli" )
 from editor import *
 set_typing_speed( 80 )
 file_open()
 type( Key.UP, Key.ALT )
 wait( 0.5 )
 home()
 wait( 0.25 )
 enter()
 wait( 1 )
 end()
 wait( 0.25 )
 enter()
 wait( 1 )
 set_typing_speed( 200 )
 paragraph()
 heading( "What text formats are supported?" )
 typer( "Scr" )
 autoinsert()
 typer( " supports Markdown, R Markdown, XML, and R XML; however, the software " )
 typer( "architecture enables it to easily add new formats. The following figure " )
 typer( "depicts the overall architecture: " )
 paragraph()
 typer( "![](../writing/images/architecture)" )
 paragraph()
 typer( "Many text editors can only open one type of plain text markup format that is " )
 typer( "only output as HTML. With a little more effort, text editors could support " )
 typer( "multiple input and output formats. Scr" )
 autoinsert()
 typer( " does so and goes one step further by introducing interpolated definitions." )
 paragraph()
 typer( "Kitten interlude:" )
 paragraph()
 typer( "![](https://i.imgur.com/jboueQH.jpg)" )
 paragraph()
 heading( "What is R?" )
 typer( "R is a programming language. You might have noticed a few potential grammar " )
 typer( "problems with direct substitution. Rules for possessive forms, numbers, and " )
 typer( "other quirks can be tackled using R." )
 # -----------------------------------------------------------------------------
 # Demo bootstrapping
 # -----------------------------------------------------------------------------
 # Jump to the end
 type( Key.END, Key.CTRL )
 paragraph()
 set_typing_speed( 300 )
 heading( "How is R used?" )
 typer( "R must be instructed where to find script files and what ones to load. The " )
 typer( "*working directory* is the full path to those R files; the *startup script* " )
 typer( "defines what R files to load. Both preferences must be changed before prose " )
 typer( "may be processed. Preferences can be opened using either the " )
 typeln( "**Edit > Preferences** menu or by pressing `Ctrl+Alt+s`. Here goes!" )
 wait( 2 )
 # -----------------------------------------------------------------------------
 # Select the R script directory
 # -----------------------------------------------------------------------------
 # Change the working directory by clicking "Browse"
 type( "s", Key.CTRL + Key.ALT )
 wait("1594592396134.png", 1)
 click("1594592396134.png")
 wait( 0.5 )
 # Navigate to and select the "r" directory
 type( Key.UP, Key.ALT )
 wait( 0.5 )
 end()
 wait( 0.5 )
 enter()
 wait( 0.5 )
 end()
 wait( 0.5 )
 type( Key.UP )
 wait( 0.5 )
 recur( 2, tab )
 wait( 0.5 )
 enter()
 wait( 1 )
 # -----------------------------------------------------------------------------
 # Set the R startup script instructions
 # -----------------------------------------------------------------------------
 wait("1594593710440.png", 5)
 click("1594593710440.png")
 set_typing_speed( 440 )
 typeln( "setwd( '$application.r.working.directory$' )" )
 typeln( "assign( 'anchor', '$date.anchor$', envir = .GlobalEnv )" )
 typeln( "source( 'pluralize.R' )" )
 typeln( "source( 'possessive.R' )" )
 typeln( "source( 'conversion.R' )" )
 typeln( "source( 'csv.R' )" )
 wait("1594593794335.png", 3)
 click("1594593794335.png")
 paragraph()
 set_typing_speed( 220 )
 typer( "R is now configured. The startup script and other R " )
 typer( "files can be found in the " )
 typer( "[repository](https://github.com/DaveJarvis/scrivenvar/tree/master/R). " )
 wait( 1.5 )
 # Wait for the browser to appear.
 wait("1594594984108.png", 5)
 click("1594594984108.png")
 wait( 5 )
 click("1594689573764.png")
 paragraph()
 typer( "Next, we'll see how definitions and R can work together." )
 wait( 2 )

A src/test/sikuli/demo.sikuli/s04.py

 # -----------------------------------------------------------------------------
 # Copyright 2020 White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be included
 # in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # This script demonstrates using R.
 # -----------------------------------------------------------------------------
 from sikuli import *
 import sys
 if not "../editor.sikuli" in sys.path:
     sys.path.append( "../editor.sikuli" )
 from editor import *
 set_typing_speed( 220 )
 # -----------------------------------------------------------------------------
 # Open the demo text.
 # -----------------------------------------------------------------------------
 file_open()
 type( Key.UP, Key.ALT )
 wait( 0.5 )
 end()
 wait( 0.5 )
 enter()
 wait( 0.5 )
 down()
 wait( 0.5 )
 enter()
 wait( 2 )
 # -----------------------------------------------------------------------------
 # Re-open the corresponding definition file.
 # -----------------------------------------------------------------------------
 file_open()
 recur( 2, down )
 wait( 1 )
 enter()
 wait( 2 )
 # -----------------------------------------------------------------------------
 # Brief introduction to R
 # -----------------------------------------------------------------------------
 type( Key.HOME, Key.CTRL )
 end()
 paragraph()
 typer( "## Using R" )
 paragraph()
 typer( "Insert R code into documents as follows: `r# 1+1`. " )
 wait( 1.5 )
 typer( "Notice how the right-hand pane shows the computed result. I'll wait. " )
 wait( 3 )
 typer( "The syntax is: open backtick, r#, *computable expression*, close " )
 typer( "backtick. That expression can be any valid R statement. The status bar " )
 typer( "will provide clues when an R expression cannot be computed by the " )
 typer( "editor. `r# glitch`" )
 wait( 4 )
 recur( 11, backspace )
 typer( "Let's swap 34 storeys for a definition value and replace the number " )
 typer( "according to the Chicago Manual of Style (cms) rules." )
 # -----------------------------------------------------------------------------
 # Demo pluralization
 # -----------------------------------------------------------------------------
 set_typing_speed( 80 )
 edit_find( "34" )
 autoinsert()
 edit_find( "x(" )
 typer( "cms(" )
 edit_find( "storeys." )
 typer( "34." )
 autoinsert()
 edit_find( "x(" )
 typer( "pl( 'storey'," )
 wait( 4 )
 tab()
 rename_definition( "1" )
 wait( 4 )
 rename_definition( "142" )
 wait( 4 )
 rename_definition( "34" )
 wait( 4 )
 tab()
 # -----------------------------------------------------------------------------
 # Demo possessives (it, her, his, Director)
 # -----------------------------------------------------------------------------
 type( Key.HOME, Key.CTRL )
 edit_find( "Director" )
 autoinsert()
 edit_find_next()
 autoinsert()
 edit_find_next()
 autoinsert()
 type( Key.RIGHT )
 recur( 2, delete )
 autoinsert()
 home()
 edit_find( "x(" )
 typer( "pos(" )
 wait( 2 )
 tab()
 rename_definition( "Headmistress" )
 wait( 4 )
 rename_definition( "Director" )
 wait( 2 )
 tab()
 type( Key.END, Key.CTRL )
 paragraph()
 typer( "Other possessives: `r# pos( 'it' )`, `r# pos( 'her' )`, `r# pos( 'his' )`, " )
 typer( "and `r# pos( 'my' )`." )
 # -----------------------------------------------------------------------------
 # Demo conversion, including ordinal numbers
 # -----------------------------------------------------------------------------
 set_typing_speed( 160 )
 paragraph()
 heading( "Date Conversions" )
 typer( "Mixing R code with definitions invites endless possibilities. " )
 typer( "Imagine someone racing to the " )
 typer( "`r#cms( v$location$breeder$storeys, ordinal=TRUE )` floor, whereby that " )
 typer( "ordinal stems from the Hatchery's storeys' definition. Or how about " )
 typer( "a complex timeline where dates are expressed in days relative to one " )
 typer( "point in time. Let's call this the *anchor date* and define it." )
 tab()
 home()
 typer( Key.SPACE )
 insert()
 rename_definition( "date" )
 insert()
 rename_definition( "anchor" )
 insert()
 rename_definition( "1969-10-29" )
 tab()
 paragraph()
 typer( "Next, set an R variable named `now` to the current date" )
 typer( "`r# now = format( Sys.time(), '%Y-%m-%d' ); ''`--- the empty single quotes " )
 typer( "prevent the date from appearing in the output document. " )
 paragraph()
 typer( "We set the anchor date to `r# annal()`, which was " )
 typer( "`r# elapsed( 0, days( v$date$anchor, format( Sys.time(), '%Y-%m-%d' ) ) )` " )
 typer( "ago from `r# format( as.Date( now ), '%B %d, %Y' )`. " )
 # -----------------------------------------------------------------------------
 # Demo CSV file import
 # -----------------------------------------------------------------------------
 paragraph()
 heading( "Tabular Data" )
 typer( "The following table shows average Canadian lifespans by birth " )
 typer( "year and sex:" )
 paragraph()
 typer( "`r# csv2md( '../data.csv', total=FALSE )`" )
 paragraph()
 typer( "Calling `csv2md` converts the comma-separated values in the spreadsheet " )
 typer( "to a table formatted using Markdown. The HTML preview pane changes the " )
 typer( "appearance of the resulting table. Using `../data.csv` instructs R to " )
 typer( "open `data.csv` from one directory above the *working directory*." )
 # -----------------------------------------------------------------------------
 # Demo HTML export
 # -----------------------------------------------------------------------------
 paragraph()
 heading( "Export" )
 typer( "Retrieve the output HTML by using the **Edit > Copy HTML** menu. Let's " )
 typer( "peek at the output." )
 wait( 2 )
 type( "e", Key.ALT )
 wait( 0.5 )
 down()
 wait( 0.25 )
 enter()
 wait( 0.25 )
 type( "a", Key.CTRL )
 wait( 0.25 )
 type( "v", Key.CTRL )
 wait( 5 )
 set_typing_speed( 40 )
 # Jump to page bottom (should already be there, but just in case)
 type( Key.END, Key.CTRL )
 recur( 3, typer, Key.PAGE_UP )
 type( Key.HOME, Key.CTRL )
 wait( 3 )
 set_typing_speed( 220 )
 type( "z", Key.CTRL )
 type( Key.END, Key.CTRL )
 paragraph()
 typer( "That's all for now, thank you!" )
 wait( 5 )
 # Delete the anchor date.
 tab()
 end()
 recur( 2, type, Key.UP )
 delete()
 tab()

A src/test/sikuli/demo.sikuli/test.py

 from sikuli import *
 import sys
 import os
 def set_class_path():
     path_script = getBundlePath()
     dir_script = os.path.dirname( path_script )
     path_lib = dir_script + "/keycast/build/libs/keycast.jar"
     sys.path.append( path_lib )
 def launch():
     from com.whitemagicsoftware.keycast import KeyCast
     kc = KeyCast()
     kc.show()
 def main():
     set_class_path()
     launch()
 if __name__ == "__main__":
     main()

A src/test/sikuli/editor.sikuli/1594187923258.png

Binary file

A src/test/sikuli/editor.sikuli/editor.py

 # -----------------------------------------------------------------------------
 # Copyright 2020 White Magic Software, Ltd.
+#
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
+#
 # The above copyright notice and this permission notice shall be included
 # in all copies or substantial portions of the Software.
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 # -----------------------------------------------------------------------------
 # -----------------------------------------------------------------------------
 # This script contains helper functions used by the other scripts.
+#
 # Do not run this script.
 # -----------------------------------------------------------------------------
 from sikuli import *
 import sys
 import os
 from os.path import expanduser
 dir_home = expanduser( "~" )
 app_home = dir_home + "/bin"
 app_bin = app_home + "/scrivenvar.jar"
 wpm_typing_speed = 80
 # -----------------------------------------------------------------------------
 # Try to delete the file pointed to by the path variable. If there is no such
 # file, this will silently ignore the exception.
 # -----------------------------------------------------------------------------
 def rm( path ):
     try:
         os.remove( path )
     except:
         print "Ignored"
 # -----------------------------------------------------------------------------
 # Changes the current typing speed, where speed is given in words per minute.
 # -----------------------------------------------------------------------------
 def set_typing_speed( wpm ):
     global wpm_typing_speed
     wpm_typing_speed = wpm
 # -----------------------------------------------------------------------------
 # Creates a delay between keystrokes to emulate typing at a particular speed.
 # -----------------------------------------------------------------------------
 def random_wait():
     from time import sleep
     from random import uniform
     cpm = wpm_typing_speed * 5.1
     cps = cpm / 60.0
     ms_per_char = 1000.0 / cps
     ms_per_stroke = ms_per_char / 2.0
     noise = uniform( 0, ms_per_stroke / 2 )
     duration = (ms_per_stroke + noise ) / 1000
     sleep( duration )
 # -----------------------------------------------------------------------------
 # Repeats a function call, f, n times.
 # -----------------------------------------------------------------------------
 def recur( n, f, *args ):
     for i in range( n ):
         f( *args )
         random_wait()
 # -----------------------------------------------------------------------------
 # Emulate a typist who is typing in the given text.
 # -----------------------------------------------------------------------------
 def typer( text ):
     for c in text:
         type( c )
         random_wait()
 # -----------------------------------------------------------------------------
 # Type a line of text followed by typing the ENTER key.
 # -----------------------------------------------------------------------------
 def typeln( text ):
     typer( text )
     enter()
 # -----------------------------------------------------------------------------
 # Injects a definition.
 # -----------------------------------------------------------------------------
 def autoinsert():
     type( Key.SPACE, Key.CTRL )
     random_wait()
 # -----------------------------------------------------------------------------
 # Types the TAB key.
 # -----------------------------------------------------------------------------
 def tab():
     typer( Key.TAB )
 # -----------------------------------------------------------------------------
 # Types the ENTER key.
 # -----------------------------------------------------------------------------
 def enter():
     typer( Key.ENTER )
 # -----------------------------------------------------------------------------
 # Types the ESC key.
 # -----------------------------------------------------------------------------
 def esc():
     typer( Key.ESC )
 # -----------------------------------------------------------------------------
 # Types the DOWN arrow key.
 # -----------------------------------------------------------------------------
 def down():
     typer( Key.DOWN )
 # -----------------------------------------------------------------------------
 # Types the HOME key.
 # -----------------------------------------------------------------------------
 def home():
     typer( Key.HOME )
 # -----------------------------------------------------------------------------
 # Types the END key.
 # -----------------------------------------------------------------------------
 def end():
     typer( Key.END )
 # -----------------------------------------------------------------------------
 # Types the BACKSPACE key.
 # -----------------------------------------------------------------------------
 def backspace():
     typer( Key.BACKSPACE )
 # -----------------------------------------------------------------------------
 # Types the INSERT key, often to insert a new definition.
 # -----------------------------------------------------------------------------
 def insert():
     typer( Key.INSERT )
 # -----------------------------------------------------------------------------
 # Types the DELETE key, often to remove selected text.
 # -----------------------------------------------------------------------------
 def delete():
     typer( Key.DELETE )
 # -----------------------------------------------------------------------------
 # Moves the cursor one word to the right.
 # -----------------------------------------------------------------------------
 def skip_right():
     type( Key.RIGHT, Key.CTRL )
     random_wait()
 def select_word_right():
     type( Key.RIGHT, Key.CTRL + Key.SHIFT )
     random_wait()
 # -----------------------------------------------------------------------------
 # Types ENTER twice to begin a new paragraph.
 # -----------------------------------------------------------------------------
 def paragraph():
     recur( 2, enter )
     wait( 1.5 )
 # -----------------------------------------------------------------------------
 # Writes a heading to the document using the given text value as the content.
 # -----------------------------------------------------------------------------
 def heading( text ):
     typer( "# " + text )
     paragraph()
 # -----------------------------------------------------------------------------
 # Clicks the "Create" button to add a new definition.
 # -----------------------------------------------------------------------------
 def click_create():
     click("1594187923258.png")
     wait( .5 )
 # -----------------------------------------------------------------------------
 # Changes the text for the actively selected definition.
 # -----------------------------------------------------------------------------
 def rename_definition( text ):
     typer( Key.F2 )
     typer( text )
     enter()
     wait( .5 )
 # -----------------------------------------------------------------------------
 # Searches for the given text within the document.
 # -----------------------------------------------------------------------------
 def edit_find( text ):
     type( "f", Key.CTRL )
     typer( text )
     enter()
     wait( .25 )
     esc()
     wait( .5 )
 # -----------------------------------------------------------------------------
 # Searches for the next occurrence of the previous search term.
 # -----------------------------------------------------------------------------
 def edit_find_next():
     typer( Key.F3 )
     wait( .5 )
 # -----------------------------------------------------------------------------
 # Opens a dialog for selecting a file.
 # -----------------------------------------------------------------------------
 def file_open():
     type( "o", Key.CTRL )
     wait( 1 )