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/*****************************************************************************
* Copyright (c) 2009 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:
* Patrick Tessier (CEA LIST) Patrick.tessier@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.diagram.clazz.custom.policies;
import java.util.Iterator;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gmf.runtime.diagram.core.listener.DiagramEventBroker;
import org.eclipse.gmf.runtime.diagram.core.listener.NotificationListener;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.gef.ui.internal.editpolicies.GraphicalEditPolicyEx;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.core.listenerservice.IPapyrusListener;
import org.eclipse.papyrus.diagram.common.Activator;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.NamedElement;
import org.eclipse.uml2.uml.TemplateBinding;
import org.eclipse.uml2.uml.TemplateParameter;
import org.eclipse.uml2.uml.TemplateParameterSubstitution;
import org.eclipse.uml2.uml.UMLPackage;
/**
* It is used to refresh the label of substitution element
*/
public class TemplateBindingDisplayEditPolicy extends GraphicalEditPolicyEx implements NotificationListener, IPapyrusListener {
public static String TEMPLATE_PARAMETER_DISPLAY = "TEMPLATE_SUBSTITUION_DISPLAY";
/**
* Stores the semantic element related to the edit policy. If resolveSemanticElement is used, there are problems when the edit part is getting
* destroyed, i.e. the link to the semantic element is removed, but the listeners should still be removed
*/
protected Element hostSemanticElement;
/**
* Returns the view controlled by the host edit part
*
* @return the view controlled by the host edit part
*/
protected View getView() {
return (View)getHost().getModel();
}
/**
* Sets the semantic element which is linked to the edit policy
*
* @return the element linked to the edit policy
*/
protected Element initSemanticElement() {
return (Element)getView().getElement();
}
/**
* Gets the diagram event broker from the editing domain.
*
* @return the diagram event broker
*/
protected DiagramEventBroker getDiagramEventBroker() {
TransactionalEditingDomain theEditingDomain = ((IGraphicalEditPart)getHost()).getEditingDomain();
if(theEditingDomain != null) {
return DiagramEventBroker.getInstance(theEditingDomain);
}
return null;
}
/**
*
* {@inheritDoc}
*/
public void activate() {
// retrieve the view and the element managed by the edit part
View view = getView();
if(view == null) {
return;
}
hostSemanticElement = initSemanticElement();
if(hostSemanticElement != null) {
// adds a listener on the view and the element controlled by the editpart
getDiagramEventBroker().addNotificationListener(view, this);
getDiagramEventBroker().addNotificationListener(hostSemanticElement, this);
if(((TemplateBinding)hostSemanticElement).getParameterSubstitutions().size() > 0) {
Iterator<TemplateParameterSubstitution> iter = ((TemplateBinding)hostSemanticElement).getParameterSubstitutions().iterator();
while(iter.hasNext()) {
TemplateParameterSubstitution substitution = iter.next();
//add a listener on the substitution and its references in order to have a correct refresh
getDiagramEventBroker().addNotificationListener(substitution, this);
if(substitution.getFormal() != null && substitution.getFormal().getParameteredElement() instanceof NamedElement) {
getDiagramEventBroker().addNotificationListener(((NamedElement)substitution.getFormal().getParameteredElement()), this);
}
if(substitution.getActual() instanceof NamedElement) {
getDiagramEventBroker().addNotificationListener(substitution.getActual(), this);
}
}
}
refreshDisplay();
} else {
Activator.log.error("No semantic element was found during activation of the mask managed label edit policy", null);
}
}
/**
*
* {@inheritDoc}
*/
public void deactivate() {
// retrieve the view and the element managed by the edit part
View view = getView();
if(view == null) {
return;
}
// remove notification on element and view
getDiagramEventBroker().removeNotificationListener(view, this);
getDiagramEventBroker().removeNotificationListener(hostSemanticElement, this);
if(((TemplateBinding)hostSemanticElement).getParameterSubstitutions().size() > 0) {
Iterator<TemplateParameterSubstitution> iter = ((TemplateBinding)hostSemanticElement).getParameterSubstitutions().iterator();
while(iter.hasNext()) {
TemplateParameterSubstitution substitution = iter.next();
getDiagramEventBroker().removeNotificationListener(substitution, this);
}
}
// removes the reference to the semantic element
hostSemanticElement = null;
}
protected void refreshDisplay() {
getHost().refresh();
}
public void notifyChanged(Notification notification) {
if(notification.getEventType() == Notification.SET && notification.getNotifier() instanceof TemplateParameterSubstitution) {
if(notification.getFeature().equals(UMLPackage.eINSTANCE.getTemplateParameterSubstitution_Actual())) {
getDiagramEventBroker().addNotificationListener((EObject)notification.getNewValue(), this);
}
if(notification.getFeature().equals(UMLPackage.eINSTANCE.getTemplateParameterSubstitution_Formal())) {
getDiagramEventBroker().addNotificationListener(((TemplateParameter)notification.getNewValue()).getParameteredElement(), this);
}
}
if(notification.getEventType() == Notification.ADD) {
if(notification.getFeature().equals(UMLPackage.eINSTANCE.getTemplateBinding_ParameterSubstitution())) {
//add a listener on the substitution and its references in order to have a correct refresh
TemplateParameterSubstitution substitution = (TemplateParameterSubstitution)notification.getNewValue();
getDiagramEventBroker().addNotificationListener(substitution, this);
if(substitution.getFormal() != null && substitution.getFormal().getParameteredElement() instanceof NamedElement) {
getDiagramEventBroker().addNotificationListener(((NamedElement)substitution.getFormal().getParameteredElement()), this);
}
if(substitution.getActual() instanceof NamedElement) {
getDiagramEventBroker().addNotificationListener(substitution.getActual(), this);
}
}
}
if(notification.getEventType() == Notification.REMOVE) {
if(notification.getFeature().equals(UMLPackage.eINSTANCE.getTemplateBinding_ParameterSubstitution())) {
//add a listener
TemplateParameterSubstitution substitution = (TemplateParameterSubstitution)notification.getNewValue();
getDiagramEventBroker().removeNotificationListener(substitution, this);
if(substitution.getFormal() != null && substitution.getFormal().getParameteredElement() instanceof NamedElement) {
getDiagramEventBroker().removeNotificationListener(((NamedElement)substitution.getFormal().getParameteredElement()), this);
}
if(substitution.getActual() instanceof NamedElement) {
getDiagramEventBroker().removeNotificationListener(substitution.getActual(), this);
}
}
}
refreshDisplay();
}
}
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