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/*******************************************************************************
* Copyright (c) 2013 Stefan Seelmann and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Stefan Seelmann - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.wikitext.markdown.core.token;
import org.eclipse.mylyn.internal.wikitext.markdown.core.LinkDefinition;
import org.eclipse.mylyn.internal.wikitext.markdown.core.MarkdownContentState;
import org.eclipse.mylyn.wikitext.core.parser.ImageAttributes;
import org.eclipse.mylyn.wikitext.core.parser.markup.PatternBasedElement;
import org.eclipse.mylyn.wikitext.core.parser.markup.PatternBasedElementProcessor;
/**
* Detects reference-style images: ![Alt text][Reference ID].
*
* @author Stefan Seelmann
*/
public class ReferenceStyleImageReplacementToken extends PatternBasedElement {
@Override
protected String getPattern(int groupOffset) {
return "!(\\[\\s*(.+?)\\s*\\]\\s*\\[\\s*(.*?)\\s*\\])"; //$NON-NLS-1$
}
@Override
protected int getPatternGroupCount() {
return 3;
}
@Override
protected PatternBasedElementProcessor newProcessor() {
return new ReferenceStyleLinkReplacementTokenProcessor();
}
private static class ReferenceStyleLinkReplacementTokenProcessor extends PatternBasedElementProcessor {
@Override
public void emit() {
String altText = group(2);
String refid = group(3);
if (refid.isEmpty()) {
refid = altText;
}
MarkdownContentState mdContentState = (MarkdownContentState) getState();
LinkDefinition linkDefinition = mdContentState.getLinkDefinition(refid);
if (linkDefinition != null) {
String href = linkDefinition.getUrl();
String title = linkDefinition.getTitle();
ImageAttributes attributes = new ImageAttributes();
attributes.setTitle(title);
attributes.setAlt(altText);
builder.image(attributes, href);
} else {
// image definition is missing, just print the raw content
builder.characters(group(1));
}
}
}
}
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