/*******************************************************************************
* Copyright (c) 2004 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
* Vlad Dumitrescu
*******************************************************************************/
package org.erlide.ui.editors.erl;
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.erlide.ui.util.IColorManager;
/**
* The color manager for the system (very simple implementation)
*
*
* @author Eric Merritt [cyberlync at gmail dot com]
*/
public class ColorManager implements IColorManager {
protected Map<String, RGB> fKeyTable = new HashMap<String, RGB>(10);
protected Map<Display, Map<RGB, Color>> fDisplayTable = new HashMap<Display, Map<RGB, Color>>(
2);
/**
* Flag which tells if the colors are automatically disposed when the
* current display gets disposed.
*/
private final boolean fAutoDisposeOnDisplayDispose;
/**
* Creates a new Erlang color manager which automatically disposes the
* allocated colors when the current display gets disposed.
*/
public ColorManager() {
this(true);
}
/**
* Creates a new Erlang 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 ColorManager(final boolean autoDisposeOnDisplayDispose) {
fAutoDisposeOnDisplayDispose = autoDisposeOnDisplayDispose;
}
public void dispose(final Display display) {
final Map<RGB, Color> colorTable = fDisplayTable.get(display);
if (colorTable != null) {
final Iterator<Color> e = colorTable.values().iterator();
while (e.hasNext()) {
final Color color = e.next();
if (color != null && !color.isDisposed()) {
color.dispose();
}
}
}
}
/*
* @see IColorManager#getColor(RGB)
*/
@Override
public Color getColor(final RGB rgb) {
if (rgb == null) {
return null;
}
final Display display = Display.getCurrent();
Map<RGB, Color> colorTable = fDisplayTable.get(display);
if (colorTable == null) {
colorTable = new HashMap<RGB, Color>(10);
fDisplayTable.put(display, colorTable);
if (fAutoDisposeOnDisplayDispose) {
display.disposeExec(new Runnable() {
@Override
public void run() {
dispose(display);
}
});
}
}
Color color = colorTable.get(rgb);
if (color == null) {
color = new Color(Display.getCurrent(), rgb);
colorTable.put(rgb, color);
}
return color;
}
/*
* @see IColorManager#dispose
*/
@Override
public void dispose() {
if (!fAutoDisposeOnDisplayDispose) {
dispose(Display.getCurrent());
}
}
/*
* @see IColorManager#getColor(String)
*/
@Override
public Color getColor(final String key) {
if (key == null) {
return null;
}
final RGB rgb = fKeyTable.get(key);
return getColor(rgb);
}
}