Dave Jarvis' Repositories

/*
 * Copyright 2020 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.scrivenvar.preview;

import com.scrivenvar.Services;
import com.scrivenvar.service.events.Notifier;
import org.apache.commons.io.FilenameUtils;
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.simple.extend.FormSubmissionListener;
import org.xhtmlrenderer.swing.ImageReplacedElement;

import java.awt.*;

public class SVGReplacedElementFactory
    implements ReplacedElementFactory {

  private final static Notifier sNotifier = Services.load( Notifier.class );

  /**
   * SVG filename extension.
   */
  private static final String SVG_FILE = "svg";
  private static final String HTML_IMAGE = "img";
  private static final String HTML_IMAGE_SRC = "src";

  public ReplacedElement createReplacedElement(
      final LayoutContext c, final BlockBox box, final UserAgentCallback uac,
      final int cssWidth, final int cssHeight ) {
    final Element e = box.getElement();

    if( e == null ) {
      return null;
    }

    final String nodeName = e.getNodeName();
    ReplacedElement result = null;

    if( HTML_IMAGE.equals( nodeName ) ) {
      final String src = e.getAttribute( HTML_IMAGE_SRC );
      final String ext = FilenameUtils.getExtension( src );

      if( SVG_FILE.equalsIgnoreCase( ext ) ) {
        try {
          final int width = box.getContentWidth();
          final Image image = SVGRasterizer.rasterize( src, width );

          final int w = image.getWidth( null );
          final int h = image.getHeight( null );

          result = new ImageReplacedElement( image, w, h );
        } catch( final Exception ex ) {
          getNotifier().notify( ex );
        }
      }
    }

    return result;
  }

  @Override
  public void reset() {
  }

  @Override
  public void remove( Element e ) {
  }

  @Override
  public void setFormSubmissionListener( FormSubmissionListener listener ) {
  }

  private Notifier getNotifier() {
    return sNotifier;
  }
}