/*******************************************************************************
* Copyright (c) 2012, 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.block;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.mylyn.wikitext.parser.Attributes;
/**
* Markdown headings.
*
* @author Stefan Seelmann
*/
public class HeadingBlock extends NestableBlock {
private static final Pattern pattern = Pattern.compile("(#{1,6})\\s*(.+?)\\s*(?:#*\\s*)?"); //$NON-NLS-1$
private Matcher matcher;
@Override
public boolean canStart(String line, int lineOffset) {
matcher = pattern.matcher(line.substring(lineOffset));
return matcher.matches();
}
@Override
protected int processLineContent(String line, int offset) {
int level = matcher.group(1).length();
Attributes attributes = new Attributes();
int textStart = offset + matcher.start(2);
int textEnd = offset + matcher.end(2);
String lineExcludingClosingHash = line.substring(0, textEnd);
attributes.setId(state.getIdGenerator().newId("h" + level, lineExcludingClosingHash)); //$NON-NLS-1$
builder.beginHeading(level, attributes);
markupLanguage.emitMarkupLine(getParser(), state, lineExcludingClosingHash, textStart);
builder.endHeading();
setClosed(true);
return -1;
}
}