1 files changed, 199 insertions, 0 deletions
diff --git a/extraplugins/layers/org.eclipse.papyrus.layers.stackmodel/src/org/eclipse/papyrus/layers/stackmodel/notifier/DiagramViewChangedEventNotifier.java b/extraplugins/layers/org.eclipse.papyrus.layers.stackmodel/src/org/eclipse/papyrus/layers/stackmodel/notifier/DiagramViewChangedEventNotifier.java
new file mode 100644
index 00000000000..2cce3ba7105
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+++ b/extraplugins/layers/org.eclipse.papyrus.layers.stackmodel/src/org/eclipse/papyrus/layers/stackmodel/notifier/DiagramViewChangedEventNotifier.java
@@ -0,0 +1,199 @@
+/*******************************************************************************
+ * Copyright (c) 2013 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:
+ *     Cedric Dumoulin - cedric.dumoulin@lifl.fr
+ ******************************************************************************/
+package org.eclipse.papyrus.layers.stackmodel.notifier;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.emf.common.notify.Adapter;
+import org.eclipse.emf.common.notify.Notification;
+import org.eclipse.emf.ecore.util.EContentAdapter;
+import org.eclipse.gmf.runtime.notation.Diagram;
+import org.eclipse.gmf.runtime.notation.NotationPackage;
+import org.eclipse.gmf.runtime.notation.View;
+import org.eclipse.papyrus.layers.stackmodel.layers.LayersStack;
+import org.eclipse.papyrus.layers.stackmodel.layers.LayersStackApplication;
+
+
+/**
+ * An EMF {@link Adapter} listening on notation::diagram::view added and removed.
+ * 
+ * This class listen to a {@link Diagram} and send following events to listeners:
+ * <ul>
+ *   <li>view removed</li>
+ *   <li>view added</li>
+ * </ul>
+ * 
+ * @author cedric dumoulin
+ *
+ */
+public class DiagramViewChangedEventNotifier extends EContentAdapter {
+
+	boolean isDisposed = false;
+
+	/**
+	 * List of listener to notify.
+	 */
+	protected List<IDiagramViewEventListener> listeners = new ArrayList<IDiagramViewEventListener>();
+
+	/**
+	 * Something happen on the tree of object
+	 * @see org.eclipse.emf.ecore.util.EContentAdapter#notifyChanged(org.eclipse.emf.common.notify.Notification)
+	 *
+	 * @param msg
+	 */
+	public void notifyChanged(Notification notification) {
+
+		// Self atttach
+		super.notifyChanged(notification);
+
+		// We are only interested in views (from newValue if set, or oldValue if removed)
+		Object newValue = notification.getNewValue();
+		if( ! (newValue instanceof View || notification.getOldValue() instanceof View ) ) {
+			return;
+		}
+		// Check diagram modification
+		// There is 4 sources: View::persistedChildren and View::transientChildren
+		// Diagram::persistedChildren and Diagram::transientChildren
+		Object feature = notification.getFeature();
+		if( feature == NotationPackage.eINSTANCE.getView_PersistedChildren() 
+				|| feature == NotationPackage.eINSTANCE.getView_TransientChildren() 
+				|| feature == NotationPackage.eINSTANCE.getDiagram_PersistedEdges() 
+				|| feature == NotationPackage.eINSTANCE.getDiagram_TransientEdges() ) {
+			// LayerOperator::layers || LayersStack::layers
+			// check the event type.
+			switch(notification.getEventType()) {
+			case Notification.SET:
+
+				break;
+			case Notification.ADD:
+				// A view is added
+				fireDiagramViewAddedEvent(notification);
+				break;
+			case Notification.REMOVE:
+				// A layer is removed
+				fireDiagramViewRemovedEvent(notification);
+				break;
+			}
+		}
+
+	};
+
+	/**
+	 * This Adapter is for {@link LayersTreeEventNotifier}.
+	 * 
+	 * @see org.eclipse.emf.common.notify.impl.AdapterImpl#isAdapterForType(java.lang.Object)
+	 *
+	 * @param type
+	 * @return
+	 */
+	@Override
+	public boolean isAdapterForType(Object type) {
+		return type == DiagramViewChangedEventNotifier.class;
+	}
+	
+	/**
+	 * Constructor.
+	 *
+	 * @param layersModel
+	 */
+	public DiagramViewChangedEventNotifier() {
+	}
+
+	/**
+	 * Dispose the synchronizer
+	 */
+	public void dispose() {
+
+		if(isDisposed()) {
+			return;
+		}
+
+		isDisposed = true;
+		listeners.clear();
+	}
+
+	/**
+	 * Return true if the object is disposed.
+	 * @return
+	 */
+	public boolean isDisposed() {
+		return isDisposed == true;
+	}
+
+	/**
+	 * Add the specified listener to the list of listener.
+	 * Do not add it if the listener is already in the list.
+	 * 
+	 * @param listener
+	 */
+	public void addEventListener(IDiagramViewEventListener listener) {
+
+		if(listener == null ) {
+			return;
+		}
+
+		// Check if exist
+		if( listeners.contains(listener)) {
+			return;
+		}
+
+		listeners.add(listener);
+	}
+
+	/** 
+	 * Remove the specified listener from the list of listeners.
+	 * @param listener
+	 */
+	public void removeEventListener(IDiagramViewEventListener listener) {
+
+		listeners.remove(listener);
+	}
+
+	/**
+	 * Called by events when a {@link LayersStack} is added to the {@link LayersStackApplication}
+	 * @param msg
+	 */
+	protected void fireDiagramViewAddedEvent(Notification msg) {
+		for(IDiagramViewEventListener listener : listeners) {
+			listener.diagramViewAdded(msg);
+		}
+	}
+
+	/**
+	 * Called by events when a {@link LayersStack} is added to the {@link LayersStackApplication}
+	 * @param msg
+	 */
+	protected void fireDiagramViewRemovedEvent(Notification msg) {
+		for(IDiagramViewEventListener listener : listeners) {
+			listener.diagramViewRemoved(msg);
+		}
+	}
+
+	/**
+	 * Get the removed diagram in case of diagramRemoved event
+	 * @param msg
+	 * @return
+	 */
+	public static View viewAddedEvent_getAddedView(Notification msg) {
+		return (View)msg.getNewValue();
+	}
+
+	/**
+	 * Get the removed diagram in case of diagramRemoved event
+	 * @param msg
+	 * @return
+	 */
+	public static View viewAddedEvent_getRemovedView(Notification msg) {
+		return (View)msg.getOldValue();
+	}
+
+}