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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;
import java.io.InputStream;
import java.io.IOException;
import java.util.ResourceBundle;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.PlatformUI;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.compare.*;
import org.eclipse.compare.contentmergeviewer.ContentMergeViewer;
/**
*/
public class ImageMergeViewer extends ContentMergeViewer {
private static final String BUNDLE_NAME= "org.eclipse.compare.internal.ImageMergeViewerResources"; //$NON-NLS-1$
private Object fLeftImage;
private Object fRightImage;
private ImageCanvas fAncestor;
private ImageCanvas fLeft;
private ImageCanvas fRight;
public ImageMergeViewer(Composite parent, int styles, CompareConfiguration mp) {
super(styles, ResourceBundle.getBundle(BUNDLE_NAME), mp);
PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, ICompareContextIds.IMAGE_COMPARE_VIEW);
buildControl(parent);
String title= Utilities.getString(getResourceBundle(), "title"); //$NON-NLS-1$
getControl().setData(CompareUI.COMPARE_VIEWER_TITLE, title);
}
protected void updateContent(Object ancestor, Object left, Object right) {
setInput(fAncestor, ancestor);
fLeftImage= left;
setInput(fLeft, left);
fRightImage= right;
setInput(fRight, right);
}
/*
* We can't modify the contents of either side we just return null.
*/
protected byte[] getContents(boolean left) {
return null;
}
public void createControls(Composite composite) {
fAncestor= new ImageCanvas(composite, SWT.NO_FOCUS);
fLeft= new ImageCanvas(composite, SWT.NO_FOCUS);
fRight= new ImageCanvas(composite, SWT.NO_FOCUS);
}
private static void setInput(ImageCanvas canvas, Object input) {
if (canvas != null) {
InputStream stream= null;
if (input instanceof IStreamContentAccessor) {
IStreamContentAccessor sca= (IStreamContentAccessor) input;
if (sca != null) {
try {
stream= sca.getContents();
} catch (CoreException ex) {
// NeedWork
}
}
}
Image image= null;
Display display= canvas.getDisplay();
if (stream != null) {
try {
image= new Image(display, stream);
} catch (SWTException ex) {
// silently ignored
}
}
canvas.setImage(image);
if (image != null) {
canvas.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND));
} else {
canvas.setBackground(null);
}
if (stream != null) {
try {
stream.close();
} catch (IOException ex) {
// silently ignored
}
}
}
}
protected void handleResizeAncestor(int x, int y, int width, int height) {
if (width > 0) {
fAncestor.setVisible(true);
fAncestor.setBounds(x, y, width, height);
} else {
fAncestor.setVisible(false);
}
}
protected void handleResizeLeftRight(int x, int y, int width1, int centerWidth, int width2, int height) {
fLeft.setBounds(x, y, width1, height);
fRight.setBounds(x+width1+centerWidth, y, width2, height);
}
protected void copy(boolean leftToRight) {
if (leftToRight) {
fRightImage= fLeftImage;
setInput(fRight, fRightImage);
setRightDirty(true);
} else {
fLeftImage= fRightImage;
setInput(fLeft, fLeftImage);
setLeftDirty(true);
}
}
}
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