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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.HashSet;
import java.util.Iterator;
import java.util.Set;
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.editor.IMultiDiagramEditor;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.infra.core.utils.ServiceUtilsForActionHandlers;
import org.eclipse.papyrus.infra.emf.appearance.helper.VisualInformationPapyrusConstants;
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;
import org.eclipse.papyrus.infra.gmfdiag.css.notation.CSSStyles;
/**
* 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 {
private static Set<String> papyrusStyleAnnotations = new HashSet<String>();
static {
papyrusStyleAnnotations.add(VisualInformationPapyrusConstants.DISPLAY_NAMELABELICON);
papyrusStyleAnnotations.add(VisualInformationPapyrusConstants.SHADOWFIGURE);
papyrusStyleAnnotations.add(VisualInformationPapyrusConstants.QUALIFIED_NAME);
}
public Object execute(ExecutionEvent event) throws ExecutionException {
ISelection selection;
try {
//FIXME: Use ServiceUtilsForHandlers
//FIXME: This method is sometimes called manually with a null ExecutionEvent. It won't work with ServiceUtilsForHandlers
IMultiDiagramEditor editor = ServiceUtilsForActionHandlers.getInstance().getServiceRegistry().getService(IMultiDiagramEditor.class);
selection = editor.getEditorSite().getSelectionProvider().getSelection();
} catch (ServiceException ex) {
throw new ExecutionException(ex.getMessage(), ex);
}
// selection = HandlerUtil.getCurrentSelection(event);
if(selection == null || selection.isEmpty()) {
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, true);
}
}
}
private void resetDiagram(Diagram diagram) {
for(Object viewObject : diagram.getChildren()) {
if(viewObject instanceof View) {
resetStyle((View)viewObject, true);
}
}
for(Object lineObject : diagram.getEdges()) {
if(lineObject instanceof View) {
resetStyle((View)lineObject, 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) {
Iterator<?> styleIterator = view.getStyles().iterator();
while(styleIterator.hasNext()) {
Object styleObject = styleIterator.next();
if(styleObject instanceof NamedStyle) {
NamedStyle customStyle = (NamedStyle)styleObject;
if(!CSSStyles.RESERVED_KEYWORDS.contains(customStyle.getName())) {
styleIterator.remove();
}
} else if(styleObject instanceof Style) {
resetStyle((Style)styleObject);
}
}
if(view instanceof Style) {
resetStyle((Style)view);
}
//Remove the "forceValue" annotations
resetAnnotations(view);
//Remove the Papyrus Style EAnnotations
resetStyleAnnotations(view);
if(view.eClass() != NotationPackage.eINSTANCE.getDecorationNode()) {
//Reset the visibility (Except for labels which are not yet supported)
view.eUnset(NotationPackage.eINSTANCE.getView_Visible());
}
}
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);
}
}
}
//Resets the "Force Value" annotations (Tags to indicate that the user
//has manually selected a value, which will override the CSS Style)
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();
}
}
}
//Resets the "Custom style" Annotations (elementIcon, shadow, qualifiedName)
private void resetStyleAnnotations(View view) {
Iterator<EAnnotation> iterator = view.getEAnnotations().iterator();
while(iterator.hasNext()) {
if(papyrusStyleAnnotations.contains(iterator.next().getSource())) {
iterator.remove();
}
}
}
}
}
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