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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.handler;
import java.util.Iterator;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.ecore.EAnnotation;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.transaction.RecordingCommand;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.gmf.runtime.notation.NamedStyle;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.Style;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.infra.core.utils.ServiceUtilsForActionHandlers;
import org.eclipse.papyrus.infra.emf.Activator;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.papyrus.infra.gmfdiag.common.helper.NotationHelper;
import org.eclipse.papyrus.infra.gmfdiag.css.notation.CSSAnnotations;
/**
* This handler resets all the local appearance to their default value
* for a set of GMF Views.
*
* @author Camille Letavernier
*/
public class ResetStyleHandler extends AbstractHandler {
public Object execute(ExecutionEvent event) throws ExecutionException {
ISelection selection;
try {
selection = ServiceUtilsForActionHandlers.getInstance().getNestedActiveIEditorPart().getSite().getSelectionProvider().getSelection();
if(selection.isEmpty()) {
return null;
}
} catch (ServiceException ex) {
// TODO Auto-generated catch block
Activator.log.error(ex);
return null;
}
if(!(selection instanceof IStructuredSelection)) {
return null;
}
IStructuredSelection sSelection = (IStructuredSelection)selection;
Iterator<?> iterator = sSelection.iterator();
TransactionalEditingDomain domain = null;
while(iterator.hasNext()) {
Object selectedItem = iterator.next();
View view = NotationHelper.findView(selectedItem);
if(view == null) {
continue;
}
EditingDomain editingDomain = EMFHelper.resolveEditingDomain(view);
if(editingDomain instanceof TransactionalEditingDomain) {
domain = (TransactionalEditingDomain)editingDomain;
}
break;
}
if(domain == null) {
return null;
}
Command command = new ResetStyleCommand(domain, sSelection);
domain.getCommandStack().execute(command);
return null;
}
private class ResetStyleCommand extends RecordingCommand {
private IStructuredSelection selection;
public ResetStyleCommand(TransactionalEditingDomain domain, IStructuredSelection selection) {
super(domain);
this.selection = selection;
}
@Override
public void doExecute() {
Iterator<?> iterator = selection.iterator();
while(iterator.hasNext()) {
Object selectedItem = iterator.next();
View view = NotationHelper.findView(selectedItem);
if(view == null) {
continue;
}
if(view instanceof Diagram) {
resetDiagram((Diagram)view);
break;
} else {
//Reset the style attribute to their default value
resetStyle(view);
}
}
}
private void resetDiagram(Diagram diagram) {
for(Object viewObject : diagram.getChildren()) {
if(viewObject instanceof View) {
resetStyle((View)viewObject, true);
}
}
}
private void resetStyle(View view, boolean recursive) {
resetStyle(view);
if(recursive) {
for(Object childObject : view.getChildren()) {
if(childObject instanceof View) {
resetStyle((View)childObject, recursive);
}
}
}
}
private void resetStyle(View view) {
for(Object styleObject : view.getStyles()) {
if(styleObject instanceof Style) {
resetStyle((Style)styleObject);
}
}
if(view instanceof Style) {
resetStyle((Style)view);
}
//Remove the "forceValue" annotations
resetAnnotations(view);
}
private void resetStyle(Style style) {
if(style instanceof NamedStyle) {
//Skip custom styles.
//TODO: We should skip CSS Styles (CSSClass, CSSId, CSSStyle, DiagramStyleSheets),
//and reset custom GMF Styles (elementIcon, shadow, ...).
//What about external custom styles (ie. unkwnown styles)?
//They should be stylable, but they might contain something we don't want to reset...
return;
}
for(EStructuralFeature feature : style.eClass().getEAllStructuralFeatures()) {
//Only edit Style features
if(NotationPackage.eINSTANCE.getStyle().isSuperTypeOf(feature.getEContainingClass())) {
//Reset the value to default
style.eUnset(feature);
}
}
}
private void resetAnnotations(View view) {
Iterator<EAnnotation> iterator = view.getEAnnotations().iterator();
while(iterator.hasNext()) {
if(CSSAnnotations.CSS_FORCE_VALUE.equals(iterator.next().getSource())) {
iterator.remove();
}
}
}
}
}
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