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/*******************************************************************************
* Copyright (c) 2000, 2011 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.compare.internal.patch;
import java.util.Arrays;
import org.eclipse.jface.resource.CompositeImageDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.swt.graphics.*;
/**
* An DecoratorOverlayIcon consists of a main icon and several adornments.
* Copied until bug 164394 is resolved.
*/
class DecoratorOverlayIcon extends CompositeImageDescriptor {
// the base image
private Image base;
// the overlay images
private ImageDescriptor[] overlays;
// the size
private Point size;
/**
* OverlayIcon constructor.
*
* @param baseImage the base image
* @param overlaysArray the overlay images
* @param sizeValue the size
*/
public DecoratorOverlayIcon(Image baseImage,
ImageDescriptor[] overlaysArray, Point sizeValue) {
this.base = baseImage;
this.overlays = overlaysArray;
this.size = sizeValue;
}
/**
* Draw the overlays for the receiver.
* @param overlaysArray the overlay images
*/
protected void drawOverlays(ImageDescriptor[] overlaysArray) {
for (int i = 0; i < overlays.length; i++) {
ImageDescriptor overlay = overlaysArray[i];
if (overlay == null) {
continue;
}
ImageData overlayData = overlay.getImageData();
//Use the missing descriptor if it is not there.
if (overlayData == null) {
overlayData = ImageDescriptor.getMissingImageDescriptor()
.getImageData();
}
switch (i) {
case IDecoration.TOP_LEFT:
drawImage(overlayData, 0, 0);
break;
case IDecoration.TOP_RIGHT:
drawImage(overlayData, size.x - overlayData.width, 0);
break;
case IDecoration.BOTTOM_LEFT:
drawImage(overlayData, 0, size.y - overlayData.height);
break;
case IDecoration.BOTTOM_RIGHT:
drawImage(overlayData, size.x - overlayData.width, size.y
- overlayData.height);
break;
}
}
}
public boolean equals(Object o) {
if (!(o instanceof DecoratorOverlayIcon)) {
return false;
}
DecoratorOverlayIcon other = (DecoratorOverlayIcon) o;
return base.equals(other.base)
&& Arrays.equals(overlays, other.overlays);
}
public int hashCode() {
int code = base.hashCode();
for (int i = 0; i < overlays.length; i++) {
if (overlays[i] != null) {
code ^= overlays[i].hashCode();
}
}
return code;
}
protected void drawCompositeImage(int width, int height) {
ImageDescriptor underlay = overlays[IDecoration.UNDERLAY];
if (underlay != null) {
drawImage(underlay.getImageData(), 0, 0);
}
drawImage(base.getImageData(), 0, 0);
drawOverlays(overlays);
}
protected Point getSize() {
return size;
}
/* (non-Javadoc)
* @see org.eclipse.jface.resource.CompositeImageDescriptor#getTransparentPixel()
*/
protected int getTransparentPixel() {
return base.getImageData().transparentPixel;
}
}
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