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/*******************************************************************************
* Copyright (c) 2007, 2017 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.equinox.internal.p2.ui.sdk;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.compare.*;
import org.eclipse.compare.structuremergeviewer.Differencer;
import org.eclipse.compare.structuremergeviewer.IStructureComparator;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.equinox.internal.p2.ui.ProvUI;
import org.eclipse.equinox.internal.p2.ui.ProvUIMessages;
import org.eclipse.equinox.internal.p2.ui.model.*;
import org.eclipse.equinox.p2.metadata.IInstallableUnit;
import org.eclipse.equinox.p2.ui.ProvisioningUI;
import org.eclipse.equinox.p2.ui.RevertProfilePage;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
/**
* Same as {@link RevertProfilePage} but adds a compare button to compare profiles.
*
* @see RevertProfilePage
*
* @noextend This class is not intended to be subclassed by clients.
* @noinstantiate This class is not intended to be instantiated by clients.
* @since 2.0
*/
public class RevertProfilePageWithCompare extends RevertProfilePage {
private static final int COMPARE_ID = IDialogConstants.CLIENT_ID + 2;
Button compareButton;
@Override
public void createPageButtons(Composite parent) {
if (ProvisioningUI.getDefaultUI().getProfileId() == null)
return;
compareButton = createButton(parent, COMPARE_ID, ProvUIMessages.RevertProfilePage_CompareLabel);
compareButton.setToolTipText(ProvUIMessages.RevertProfilePage_CompareTooltip);
compareButton.setEnabled(computeCompareEnablement(getSelection()));
super.createPageButtons(parent);
}
@Override
protected void buttonPressed(int buttonId) {
switch (buttonId) {
case COMPARE_ID :
compare();
break;
default :
super.buttonPressed(buttonId);
break;
}
}
boolean computeCompareEnablement(IStructuredSelection structuredSelection) {
// compare is enabled if there are two elements selected
Object[] selection = structuredSelection.toArray();
if (selection.length == 2) {
for (int i = 0; i < selection.length; i++) {
if (!(selection[i] instanceof RollbackProfileElement))
return false;
}
return true;
}
return false;
}
@Override
protected void handleSelectionChanged(IStructuredSelection selection) {
super.handleSelectionChanged(selection);
if (!selection.isEmpty()) {
if (selection.size() == 1) {
if (compareButton != null)
compareButton.setEnabled(false);
} else {
// multiple selections, we can compare
if (compareButton != null)
compareButton.setEnabled(computeCompareEnablement(selection));
}
} else {
// Nothing is selected
if (compareButton != null)
compareButton.setEnabled(false);
}
}
private RollbackProfileElement[] getRollbackProfileElementsToCompare() {
// expecting two items selected
RollbackProfileElement[] result = new RollbackProfileElement[2];
IStructuredSelection selection = getSelection();
int i = 0;
for (Object selected : selection.toList()) {
if (selected != null && selected instanceof RollbackProfileElement) {
result[i++] = (RollbackProfileElement) selected;
}
if (i == 2)
break;
}
return result;
}
void compare() {
final RollbackProfileElement[] rpe = getRollbackProfileElementsToCompare();
CompareUI.openCompareDialog(new ProfileCompareEditorInput(rpe));
}
private class ProfileCompareEditorInput extends CompareEditorInput {
private Object root;
private ProvElementNode l;
private ProvElementNode r;
public ProfileCompareEditorInput(RollbackProfileElement[] rpe) {
super(new CompareConfiguration());
Assert.isTrue(rpe.length == 2);
l = new ProvElementNode(rpe[0]);
r = new ProvElementNode(rpe[1]);
}
@Override
protected Object prepareInput(IProgressMonitor monitor) {
initLabels();
Differencer d = new Differencer();
root = d.findDifferences(false, monitor, null, null, l, r);
return root;
}
private void initLabels() {
CompareConfiguration cc = getCompareConfiguration();
cc.setLeftEditable(false);
cc.setRightEditable(false);
cc.setLeftLabel(l.getName());
cc.setLeftImage(l.getImage());
cc.setRightLabel(r.getName());
cc.setRightImage(r.getImage());
}
@Override
public String getOKButtonLabel() {
return IDialogConstants.OK_LABEL;
}
}
private class ProvElementNode implements IStructureComparator, ITypedElement, IStreamContentAccessor {
private ProvElement pe;
private IInstallableUnit iu;
final static String BLANK = ""; //$NON-NLS-1$
private String id = BLANK;
public ProvElementNode(Object input) {
pe = (ProvElement) input;
iu = ProvUI.getAdapter(pe, IInstallableUnit.class);
if (iu != null) {
id = iu.getId();
}
}
@Override
public Object[] getChildren() {
Set<ProvElementNode> children = new HashSet<>();
if (pe instanceof RollbackProfileElement) {
Object[] c = ((RollbackProfileElement) pe).getChildren(null);
for (int i = 0; i < c.length; i++) {
children.add(new ProvElementNode(c[i]));
}
} else if (pe instanceof InstalledIUElement) {
Object[] c = ((InstalledIUElement) pe).getChildren(null);
for (int i = 0; i < c.length; i++) {
children.add(new ProvElementNode(c[i]));
}
}
return children.toArray();
}
/**
* Implementation based on <code>id</code>.
* @param other the object to compare this <code>ProvElementNode</code> against.
* @return <code>true</code> if the <code>ProvElementNodes</code>are equal; <code>false</code> otherwise.
*/
@Override
public boolean equals(Object other) {
if (other instanceof ProvElementNode)
return id.equals(((ProvElementNode) other).id);
return super.equals(other);
}
/**
* Implementation based on <code>id</code>.
* @return a hash code for this object.
*/
@Override
public int hashCode() {
return id.hashCode();
}
@Override
public Image getImage() {
return pe.getImage(null);
}
@Override
public String getName() {
if (iu != null) {
return iu.getProperty(IInstallableUnit.PROP_NAME, null);
}
return pe.getLabel(null);
}
@Override
public String getType() {
return ITypedElement.UNKNOWN_TYPE;
}
@Override
public InputStream getContents() {
String contents = BLANK;
if (iu != null) {
contents = iu.getVersion().toString();
}
return new ByteArrayInputStream(contents.getBytes());
}
}
}
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