/*******************************************************************************
* Copyright (c) 2011 Igor Malinin 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:
* Igor Malinin - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.wikitext.creole.internal.token;
import java.util.regex.Pattern;
import org.eclipse.mylyn.wikitext.creole.CreoleLanguage;
import org.eclipse.mylyn.wikitext.parser.markup.PatternBasedElement;
import org.eclipse.mylyn.wikitext.parser.markup.PatternBasedElementProcessor;
/**
* Tokens that represent links, as follows: <code>[[link]]</code>
*
* @author Igor Malinin
*/
public class LinkReplacementToken extends PatternBasedElement {
private static final Pattern replacementPattern = Pattern.compile("\\W"); //$NON-NLS-1$
@Override
protected String getPattern(int groupOffset) {
return "(~)?(\\[\\[([^\\]|]+)(?:[|]([^\\]]*))?\\]\\])"; //$NON-NLS-1$
}
@Override
protected int getPatternGroupCount() {
return 4;
}
@Override
protected PatternBasedElementProcessor newProcessor() {
return new LinkProcessor();
}
private static class LinkProcessor extends PatternBasedElementProcessor {
@Override
public void emit() {
String escaped = group(1);
if (escaped != null) {
String escapedText = group(2);
builder.characters(escapedText);
} else {
String link = group(3);
String text = group(4);
if (text == null || text.trim().length() == 0) {
text = link;
}
boolean looksLikeEmail = link.indexOf('@') != -1;
if (link.indexOf('/') != -1 || link.indexOf('#') != -1 || looksLikeEmail) {
if (looksLikeEmail) {
text = text.replaceFirst("\\s*mailto:", ""); //$NON-NLS-1$ //$NON-NLS-2$
}
// url link
builder.link(link, text);
} else {
// wiki link
String target = replacementPattern.matcher(link).replaceAll("_"); //$NON-NLS-1$
CreoleLanguage creoleLanguage = (CreoleLanguage) markupLanguage;
boolean exists = creoleLanguage.computeInternalLinkExists(target);
String internalHref = creoleLanguage.toInternalHref(target);
if (!exists) {
builder.characters(text);
builder.link(internalHref, "?"); //$NON-NLS-1$
} else {
builder.link(internalHref, text);
}
}
}
}
}
}