/*******************************************************************************

 * Copyright (c) 2004, 2007 Mylyn project committers 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

 *******************************************************************************/

package org.eclipse.mylyn.internal.java.tasks;

import java.util.ArrayList;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import org.eclipse.jface.text.BadLocationException;

import org.eclipse.jface.text.IDocument;

import org.eclipse.jface.text.IRegion;

import org.eclipse.jface.text.ITextViewer;

import org.eclipse.jface.text.Region;

import org.eclipse.jface.text.hyperlink.AbstractHyperlinkDetector;

import org.eclipse.jface.text.hyperlink.IHyperlink;

/**

 * Java Class Hyperlink Dectector, e.g. detecting org.eclipse.mylyn.internal.java.tasks.JavaClassHyperlinkDetector

 * 

 * @author Jingwen Ou

 */

public class JavaClassHyperlinkDetector extends AbstractHyperlinkDetector {

	private static final Pattern javaClassPattern = Pattern.compile("(\\w+\\.)+\\w+", Pattern.CASE_INSENSITIVE);

	private static final Pattern stackTracePattern = Pattern.compile("\\S*\\.java:\\d*\\)", Pattern.CASE_INSENSITIVE);

	public IHyperlink[] detectHyperlinks(ITextViewer textViewer, IRegion region, boolean canShowMultipleHyperlinks) {

		List<IHyperlink> hyperLinks = new ArrayList<IHyperlink>();

		try {

			IDocument document = textViewer.getDocument();

			if (document == null) {

				return null;

			}

			int offset = region.getOffset();

			IRegion lineInfo = document.getLineInformationOfOffset(offset);

			String line = document.get(lineInfo.getOffset(), lineInfo.getLength());

			// try not to conflict with JavaStackTraceHyperlinkDetector, eclipse 3.4 can display multiple links

			if (stackTracePattern.matcher(line).find()) {

				return null;

			}

			Matcher m = javaClassPattern.matcher(line);

			while (m.find()) {

				// ignore URL hyperlinks and words like "i.e."

				int beforeStart = lineInfo.getOffset() + m.start() - 1;

				int afterEnd = lineInfo.getOffset() + m.end();

				if ((beforeStart >= 0 && document.get(beforeStart, 1).equalsIgnoreCase("/"))

						|| ((afterEnd <= lineInfo.getOffset() + lineInfo.getLength()) && document.get(afterEnd, 1)

								.equalsIgnoreCase("."))) {

					continue;

				}

				IRegion urlRegion = new Region(lineInfo.getOffset() + m.start(), m.end() - m.start());

				hyperLinks.add(new JavaClassFileHyperlink(urlRegion, m.group()));

			}

		} catch (BadLocationException e) {

			return null;

		}

		return hyperLinks.size() > 0 ? hyperLinks.toArray(new IHyperlink[hyperLinks.size()]) : null;

	}

	public static void main(String str[]) {

		Pattern javaClassPattern = Pattern.compile("(\\w+\\.)+\\w+", Pattern.CASE_INSENSITIVE);

		Matcher m = javaClassPattern.matcher(" http:// www.eclipse// \n ww.dd ff. e.g.");

		while (m.find()) {

			System.out.println(m.group());

		}

	}

}

/*******************************************************************************

 * Copyright (c) 2004, 2007 Mylyn project committers 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

 *******************************************************************************/

package org.eclipse.mylyn.internal.java.tasks;

import org.eclipse.jface.text.IRegion;

/**

 * Take advantage of JavaStackTraceFileHyperlink to open link to a certain class

 * 

 * @author Jingwen Ou

 */

public class JavaClassFileHyperlink extends JavaStackTraceFileHyperlink {

	private final String traceLine;

	public JavaClassFileHyperlink(IRegion region, String traceLine) {

		super(region, traceLine);

		this.traceLine = traceLine;

	}

	@Override

	public void open() {

		startSourceSearch(traceLine, 0);

	}

}