| /******************************************************************************* |
| * Copyright (c) 2000, 2011 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.compare.internal; |
| |
| import org.eclipse.jface.resource.CompositeImageDescriptor; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.graphics.ImageData; |
| import org.eclipse.swt.graphics.Point; |
| |
| /** |
| * Combines an image with an overlay. |
| */ |
| public class DiffImageDescriptor extends CompositeImageDescriptor { |
| |
| static final int HEIGHT= 16; |
| |
| private final ImageData fBaseImageData; |
| private final ImageDescriptor fOverlayImage; |
| private final int fWidth; |
| private final boolean fLeft; |
| private final int hashCode; |
| |
| public DiffImageDescriptor(Image base, ImageDescriptor overlay, int w, boolean onLeft) { |
| ImageData data = null; |
| if (base != null) { |
| data = base.getImageData(); |
| if (data == null) |
| data = DEFAULT_IMAGE_DATA; |
| } |
| fBaseImageData = data; |
| fOverlayImage= overlay; |
| fWidth= w; |
| fLeft= onLeft; |
| hashCode = calculateHashCode(); |
| } |
| |
| private int calculateHashCode() { |
| int h1 = 0; |
| int h2 = 0; |
| if (fBaseImageData != null) { |
| h1 = calculateHash(fBaseImageData); |
| } |
| if (fOverlayImage != null) { |
| h2 = fOverlayImage.hashCode(); |
| } |
| return h1 + h2 + fWidth; |
| } |
| |
| private int calculateHash(ImageData baseImageData) { |
| byte[] data = baseImageData.data; |
| int hash = baseImageData.width + baseImageData.height; |
| for (int i = 0; i < data.length; i++) { |
| byte b = data[i]; |
| hash >>>= 1; |
| hash ^= b; |
| } |
| return hash; |
| } |
| |
| @Override |
| protected Point getSize() { |
| return new Point(fWidth, HEIGHT); |
| } |
| |
| @Override |
| protected void drawCompositeImage(int width, int height) { |
| if (fLeft) { |
| if (fBaseImageData != null) { |
| drawImage(fBaseImageData, fWidth - fBaseImageData.width, 0); |
| } |
| |
| if (fOverlayImage != null) { |
| ImageData overlay= fOverlayImage.getImageData(); |
| if (overlay == null) |
| overlay= DEFAULT_IMAGE_DATA; |
| drawImage(overlay, 0, (HEIGHT - overlay.height) / 2); |
| } |
| } else { |
| if (fBaseImageData != null) { |
| drawImage(fBaseImageData, 0, 0); |
| } |
| |
| if (fOverlayImage != null) { |
| ImageData overlay= fOverlayImage.getImageData(); |
| if (overlay == null) |
| overlay= DEFAULT_IMAGE_DATA; |
| drawImage(overlay, fWidth - overlay.width, (HEIGHT - overlay.height) / 2); |
| } |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return hashCode; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) |
| return true; |
| if (obj instanceof DiffImageDescriptor) { |
| DiffImageDescriptor other = (DiffImageDescriptor) obj; |
| return (other.hashCode == hashCode |
| && isEqual(other.fOverlayImage, fOverlayImage) |
| && other.fWidth == fWidth |
| && other.fLeft == fLeft |
| && isEqual(other.fBaseImageData, fBaseImageData)); |
| } |
| return false; |
| } |
| |
| private boolean isEqual(ImageData i1, ImageData i2) { |
| if (isEqual((Object) i1, (Object) i2)) { |
| return true; |
| } |
| if (i1 == null || i2 == null) |
| return false; |
| return (i1.width == i2.width && i1.height == i2.height |
| && i1.depth == i2.depth && i1.scanlinePad == i2.scanlinePad |
| && i1.bytesPerLine == i2.bytesPerLine |
| /* && i1.palette == i2.palette */ |
| && i1.transparentPixel == i2.transparentPixel |
| && i1.maskPad == i2.maskPad |
| && i1.alpha == i2.alpha |
| && i1.type == i2.type && i1.x == i2.x && i1.y == i2.y |
| && i1.disposalMethod == i2.disposalMethod && i1.delayTime == i2.delayTime |
| && equals(i1.data,i2.data) && equals(i1.maskData, i2.maskData) |
| && equals(i1.alphaData, i2.alphaData)); |
| } |
| |
| private boolean equals(byte[] data, byte[] data2) { |
| if (isEqual(data, data2)) |
| return true; |
| if (data == null || data2 == null) |
| return false; |
| if (data.length != data2.length) |
| return false; |
| for (int i = 0; i < data2.length; i++) { |
| if (data[i] != data2[i]) |
| return false; |
| } |
| return true; |
| } |
| |
| private boolean isEqual(Object o1, Object o2) { |
| if (o1 == o2) |
| return true; |
| if (o1 == null || o2 == null) |
| return false; |
| return o1.equals(o2); |
| } |
| } |