content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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.wst.jsdt.internal.ui.text;
  
  
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  
  import org.eclipse.swt.graphics.Color;
  import org.eclipse.swt.graphics.RGB;
  import org.eclipse.swt.widgets.Display;
  import org.eclipse.wst.jsdt.ui.text.IColorManager;
  import org.eclipse.wst.jsdt.ui.text.IColorManagerExtension;
  
  /**
   * Java color manager.
   */
  public class JavaColorManager implements IColorManager, IColorManagerExtension {
  
  	protected Map fKeyTable= new HashMap(10);
  	protected Map fDisplayTable= new HashMap(2);
  
  	/**
  	 * Flag which tells if the colors are automatically disposed when
  	 * the current display gets disposed.
  	 */
  	private boolean fAutoDisposeOnDisplayDispose;
  
  
  	/**
  	 * Creates a new Java color manager which automatically
  	 * disposes the allocated colors when the current display
  	 * gets disposed.
  	 */
  	public JavaColorManager() {
  		this(true);
  	}
  
  	/**
  	 * Creates a new Java color manager.
  	 *
  	 * @param autoDisposeOnDisplayDispose 	if <code>true</code>  the color manager
  	 * automatically disposes all managed colors when the current display gets disposed
  	 * and all calls to {@link org.eclipse.jface.text.source.ISharedTextColors#dispose()} are ignored.
  	 *
  	 * 
  	 */
  	public JavaColorManager(boolean autoDisposeOnDisplayDispose) {
  		fAutoDisposeOnDisplayDispose= autoDisposeOnDisplayDispose;
  	}
  
  	public void dispose(Display display) {
  		Map colorTable= (Map) fDisplayTable.get(display);
  		if (colorTable != null) {
  			Iterator e= colorTable.values().iterator();
  			while (e.hasNext()) {
  				Color color= (Color)e.next();
  				if (color != null && !color.isDisposed())
  					color.dispose();
  			}
  		}
  	}
  
  	/*
  	 * @see IColorManager#getColor(RGB)
  	 */
  	public Color getColor(RGB rgb) {
  
  		if (rgb == null)
  			return null;
  
  		final Display display= Display.getCurrent();
  		Map colorTable= (Map) fDisplayTable.get(display);
  		if (colorTable == null) {
  			colorTable= new HashMap(10);
  			fDisplayTable.put(display, colorTable);
  			if (fAutoDisposeOnDisplayDispose) {
  				display.disposeExec(new Runnable() {
  					public void run() {
  						dispose(display);
  					}
  				});
  			}
  		}
  
  		Color color= (Color) colorTable.get(rgb);
  		if (color == null) {
  			color= new Color(Display.getCurrent(), rgb);
  			colorTable.put(rgb, color);
  		}
  
  		return color;
  	}
  
  	/*
  	 * @see IColorManager#dispose
  	 */
  	public void dispose() {
  		if (!fAutoDisposeOnDisplayDispose)
  			dispose(Display.getCurrent());
  	}
  
  	/*
  	 * @see IColorManager#getColor(String)
  	 */
  	public Color getColor(String key) {
  
  		if (key == null)
  			return null;
  
  		RGB rgb= (RGB) fKeyTable.get(key);
  		return getColor(rgb);
  	}
  
  	/*
  	 * @see IColorManagerExtension#bindColor(String, RGB)
  	 */
  	public void bindColor(String key, RGB rgb) {
  		Object value= fKeyTable.get(key);
  		if (value != null)
  			throw new UnsupportedOperationException();
  
  		fKeyTable.put(key, rgb);
  	}
  
  	/*
  	 * @see IColorManagerExtension#unbindColor(String)
  	 */
  	public void unbindColor(String key) {
  		fKeyTable.remove(key);
  	}
  }
  