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/*******************************************************************************
* Copyright (c) 2010 BestSolution.at 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:
* Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
******************************************************************************/
package org.eclipse.e4.tools.emf.editor3x;
import org.eclipse.e4.tools.emf.ui.common.IModelResource;
import org.eclipse.jface.action.Action;
public class UndoAction extends Action {
private final IModelResource resource;
private final IModelResource.ModelListener listener;
public UndoAction(IModelResource resource) {
this.resource = resource;
listener = new IModelResource.ModelListener() {
@Override
public void commandStackChanged() {
update();
}
@Override
public void dirtyChanged() {
}
};
resource.addModelListener(listener);
update();
}
@Override
public void run() {
if (resource.getEditingDomain().getCommandStack().canUndo()) {
resource.getEditingDomain().getCommandStack().undo();
}
}
private void update() {
if (resource.getEditingDomain().getCommandStack().canUndo()) {
setText(Messages.UndoAction_Undo + " " //$NON-NLS-1$
+ resource.getEditingDomain().getCommandStack()
.getUndoCommand().getLabel());
setEnabled(true);
} else {
setText(Messages.UndoAction_Undo);
setEnabled(false);
}
}
/**
* Clean up
*/
public void dispose() {
resource.removeModelListener(listener);
}
}
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