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/*****************************************************************************
* Copyright (c) 2012 CEA LIST.
*
* 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.css.properties.databinding;
import java.util.Collection;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.papyrus.infra.gmfdiag.properties.databinding.custom.RemoveCustomStyleListValueCommand;
public class RemoveCSSStyleSheetCommand extends RemoveCustomStyleListValueCommand {
protected Resource previousResource;
public RemoveCSSStyleSheetCommand(EditingDomain domain, View view, String styleName, EClass eClass, EStructuralFeature feature, Object value) {
super(domain, view, styleName, eClass, feature, value);
}
@Override
public void execute() {
if(value instanceof EObject) {
EObject styleSheet = (EObject)value;
Collection<EStructuralFeature.Setting> references = EMFHelper.getUsages(styleSheet);
//We're removing the last reference to this styleSheet (Only if the stylesheet is contained
//in the same resource as the view referencing it... We don't modify external models)
if(references.size() == 1 && styleSheet.eResource() == view.eResource()) {
previousResource = styleSheet.eResource();
styleSheet.eResource().getContents().remove(styleSheet);
}
}
super.execute();
}
@Override
public void undo() {
//We destroyed the StyleSheet EObject: recreate it in its previous resource
if(previousResource != null) {
previousResource.getContents().add((EObject)value);
}
super.undo();
}
}
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