/*******************************************************************************
* 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.wikitext.markdown.internal;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Parser for link definitions in Markdown.
*
* @author Stefan Seelmann
*/
public class LinkDefinitionParser {
private static final String ID_REGEX = " {0,3}(\\[([^]]+?)\\]\\:)"; //$NON-NLS-1$
private static final String URL_REGEX = "\\s+(?=[<]?(([^>\\s]+)))(?:<\\3>|\\3)"; //$NON-NLS-1$
private static final String TITLE_REGEX = "(?:\\s+[\"'\\(](.*?)[\"'\\)])?"; //$NON-NLS-1$
public static final Pattern LINK_DEFINITION_PATTERN = Pattern.compile(ID_REGEX + URL_REGEX + TITLE_REGEX);
private Map<String, LinkDefinition> linkDefinitions;
public void parse(String markupContent) {
linkDefinitions = new HashMap<String, LinkDefinition>();
Matcher matcher = LINK_DEFINITION_PATTERN.matcher(markupContent);
while (matcher.find()) {
String id = matcher.group(2);
String url = matcher.group(3);
String title = matcher.group(5);
int offset = matcher.start(1);
int length = matcher.end() - offset;
linkDefinitions.put(id.toLowerCase(), new LinkDefinition(id, url, title, offset, length));
}
}
public LinkDefinition getLinkDefinition(String id) {
return linkDefinitions.get(id.toLowerCase());
}
public Map<String, LinkDefinition> getLinkDefinitions() {
return linkDefinitions;
}
}