package org.eclipse.jdt.internal.debug.ui.console;

/**********************************************************************
Copyright (c) 2002 IBM Corp.  All rights reserved.
This file is made available under the terms of the Common Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v10.html
**********************************************************************/

import org.eclipse.debug.ui.console.IConsole;
import org.eclipse.debug.ui.console.IConsoleHyperlink;
import org.eclipse.debug.ui.console.IConsoleLineTracker;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IRegion;

/**
 * Provides links for stack traces in J9 output
 */
public class J9ConsoleTracker implements IConsoleLineTracker {
	
	/**
	 * The console associated with this line tracker 
	 */
	private IConsole fConsole;
	
	private StringMatcher fJ9Matcher;

	/**
	 * @see org.eclipse.debug.ui.console.IConsoleLineTracker#init(org.eclipse.debug.ui.console.IConsole)
	 */
	public void init(IConsole console) {
		fConsole = console;
		fJ9Matcher = new StringMatcher("*.*(*)*", false, false); //$NON-NLS-1$
	}

	/**
	 * @see org.eclipse.debug.ui.console.IConsoleLineTracker#lineAppended(org.eclipse.jface.text.IRegion)
	 */
	public void lineAppended(IRegion line) {
		try {
			int offset = line.getOffset();
			int length = line.getLength();
			String text = fConsole.getDocument().get(offset, length);
			int index = -1;
			if (fJ9Matcher.match(text)) {
				// find the last space in the line
				index = text.lastIndexOf(' ');
				if (index >= 0) {
					int linkOffset = offset + index + 1;
					int linkLength = length - index - 1;
					IConsoleHyperlink link = null;
					link = new J9StackTraceHyperlink(fConsole);
					fConsole.addLink(link, linkOffset, linkLength);
				}				
			}
		} catch (BadLocationException e) {
		}
	}

	/**
	 * @see org.eclipse.debug.ui.console.IConsoleLineTracker#dispose()
	 */
	public void dispose() {
		fConsole = null;
		fJ9Matcher = null;
	}

}