org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/launch/DecorationManager.java

/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.debug.internal.ui.views.launch;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;

import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.debug.core.model.IThread;

/**
 * Manages source selections and decorated editors for launch views.
 */
public class DecorationManager {

    // map of targets to lists of active decorations
    private static Map fDecorations = new HashMap(10);

    /**
     * Adds the given decoration for the given stack frame.
     * 
     * @param decoration
     * @param frame
     */
    public static void addDecoration(Decoration decoration) {
        synchronized (fDecorations) {
            IDebugTarget target = decoration.getThread().getDebugTarget();
            List list = (List) fDecorations.get(target);
            if (list == null) {
                list = new ArrayList();
                fDecorations.put(target, list);
            }
            list.add(decoration);
        }
    }

    /**
     * Removes any decorations for the given debug target.
     * 
     * @param target
     *            to remove editor decorations for
     */
    public static void removeDecorations(IDebugTarget target) {
    	doRemoveDecorations(target, null);
    }
    
    /**
     * Removes any decorations for the given thread
     * 
     * @param thread
     *            thread to remove decorations for
     */
    public static void removeDecorations(IThread thread) {
    	doRemoveDecorations(thread.getDebugTarget(), thread);
    }

	private static void doRemoveDecorations(IDebugTarget target, IThread thread) {
		ArrayList decorationsToRemove = new ArrayList();
        synchronized (fDecorations) {
            List list = (List) fDecorations.get(target);
            if (list != null) {
                ListIterator iterator = list.listIterator();
                while (iterator.hasNext()) {
                    Decoration decoration = (Decoration) iterator.next();
                    if (thread == null || thread.equals(decoration.getThread())) {
	                    decorationsToRemove.add(decoration);
	                    iterator.remove();
                    }
                }
                if (list.isEmpty()) {
                	fDecorations.remove(target);
                }
            }
        }
        Iterator iter = decorationsToRemove.iterator();
        while (iter.hasNext())
        {
        	Decoration decoration = (Decoration)iter.next();
        	decoration.remove();
        }
	}
	
}