/**
* Copyright (c) 2008-2010 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 - Initial API and implementation
*/
package org.eclipse.emf.edit.ui.provider;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Display;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.edit.provider.IItemColorProvider;
import org.eclipse.emf.edit.ui.EMFEditUIPlugin;
import org.eclipse.jface.resource.ColorDescriptor;
import org.eclipse.jface.resource.DeviceResourceException;
/**
* A color registry for converting a color description into an actual color.
* @see IItemColorProvider
*/
public class ExtendedColorRegistry
{
public static final ExtendedColorRegistry INSTANCE = new ExtendedColorRegistry()
{
@Override
public Color getColor(Color foregroundColor, Color backgroundColor, Object object)
{
return ExtendedImageRegistry.getInstance(ExtendedColorRegistry.class).getColor(foregroundColor, backgroundColor, object);
}
};
protected Display display;
protected HashMap<Collection<?>, Color> table = new HashMap<Collection<?>, Color>(10);
public ExtendedColorRegistry()
{
display = Display.getCurrent();
hookDisplayDispose(display);
}
public ExtendedColorRegistry(Display display)
{
this.display = display;
hookDisplayDispose(display);
}
public Color getColor(Color foregroundColor, Color backgroundColor, Object object)
{
if (object instanceof Color)
{
return (Color)object;
}
else
{
Collection<Object> key = new ArrayList<Object>(2);
key.add(foregroundColor);
key.add(backgroundColor);
key.add(object);
Color result = table.get(key);
if (result == null)
{
if (object instanceof ColorDescriptor)
{
ColorDescriptor colorDescriptor = (ColorDescriptor)object;
try
{
result = colorDescriptor.createColor(display);
}
catch (DeviceResourceException exception)
{
EMFEditUIPlugin.INSTANCE.log(exception);
}
}
else if (object instanceof URI)
{
URI colorURI = (URI)object;
if (!"color".equals(colorURI.scheme()))
{
throw new IllegalArgumentException("Only 'color' scheme is recognized" + colorURI);
}
RGB colorData;
if ("rgb".equals(colorURI.authority()))
{
int red = Integer.parseInt(colorURI.segment(0));
int green = Integer.parseInt(colorURI.segment(1));
int blue = Integer.parseInt(colorURI.segment(2));
colorData = new RGB(red, green, blue);
}
else if ("hsb".equals(colorURI.authority()))
{
float[] hsb = new float[3];
for (int i = 0; i < 3; ++i)
{
String segment = colorURI.segment(i);
hsb[i] =
"".equals(segment) || "foreground".equals(segment) ?
foregroundColor.getRGB().getHSB()[i]:
"background".equals(segment) ?
backgroundColor.getRGB().getHSB()[i]:
Float.parseFloat(segment);
}
colorData = new RGB(hsb[0], hsb[1], hsb[2]);
}
else
{
throw new IllegalArgumentException("Only 'rgb' and 'hsb' authority are recognized" + colorURI);
}
try
{
result = ColorDescriptor.createFrom(colorData).createColor(display);
}
catch (DeviceResourceException exception)
{
EMFEditUIPlugin.INSTANCE.log(exception);
}
}
if (result != null)
{
table.put(key, result);
}
}
return result;
}
}
protected void handleDisplayDispose()
{
for (Color color : table.values())
{
color.dispose();
}
table = null;
}
protected void hookDisplayDispose(Display display)
{
display.disposeExec
(new Runnable()
{
public void run()
{
handleDisplayDispose();
}
});
}
}