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/*******************************************************************************
* Copyright (c) 2012 Obeo.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.emf.compare.ide.ui.internal.handler;
import java.util.Iterator;
import org.eclipse.compare.CompareEditorInput;
import org.eclipse.compare.CompareUI;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* @author <a href="mailto:mikael.barbero@obeo.fr">Mikael Barbero</a>
*/
public class CompareInNewEditor extends AbstractCompareHandler {
/**
* {@inheritDoc}
*
* @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
*/
public Object execute(ExecutionEvent event) throws ExecutionException {
AdapterFactory adapterFactory = new ComposedAdapterFactory(
ComposedAdapterFactory.Descriptor.Registry.INSTANCE);
final IWorkbenchPart activePart = HandlerUtil.getActivePart(event);
final ISelection currentSelection = HandlerUtil.getCurrentSelection(event);
if (currentSelection instanceof IStructuredSelection) {
Iterator<?> iterator = ((IStructuredSelection)currentSelection).iterator();
Notifier left = null;
Notifier right = null;
Notifier origin = null;
left = (Notifier)iterator.next();
if (iterator.hasNext()) {
right = (Notifier)iterator.next();
}
if (iterator.hasNext()) {
origin = (Notifier)iterator.next();
}
if (origin != null) {
Shell shell = HandlerUtil.getActiveShell(event);
SelectAncestorDialog dialog = new SelectAncestorDialog(shell, adapterFactory, new Notifier[] {
left, right, origin });
if (dialog.open() == Window.CANCEL) {
return null;
} else {
left = dialog.leftNotifier;
right = dialog.rightNotifier;
origin = dialog.originNotifier;
}
}
if (left instanceof EObject
&& right instanceof EObject
&& (EcoreUtil.isAncestor((EObject)left, (EObject)right) || EcoreUtil.isAncestor(
(EObject)right, (EObject)left))) {
MessageDialog.openInformation(activePart.getSite().getShell(), "EMF Compare",
"Can't run a comparison between an object and one of its ancestor.");
} else {
final CompareEditorInput input = createCompareEditorInput(activePart, adapterFactory, left,
right, origin);
CompareUI.openCompareEditor(input);
}
}
return null; // Reserved for future use, MUST be null.
}
}
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