1 files changed, 141 insertions, 0 deletions
diff --git a/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.navigation/src/org/eclipse/papyrus/infra/gmfdiag/navigation/CreateDiagramWithNavigationHandler.java b/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.navigation/src/org/eclipse/papyrus/infra/gmfdiag/navigation/CreateDiagramWithNavigationHandler.java
new file mode 100644
index 00000000000..2ed94d20f54
--- /dev/null
+++ b/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.navigation/src/org/eclipse/papyrus/infra/gmfdiag/navigation/CreateDiagramWithNavigationHandler.java
@@ -0,0 +1,141 @@
+/*****************************************************************************
+ * Copyright (c) 2010 Atos Origin.
+ *
+ *    
+ * 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:
+ *  Mathieu Velten (Atos Origin) mathieu.velten@atosorigin.com - Initial API and implementation
+ *
+ *****************************************************************************/
+package org.eclipse.papyrus.infra.gmfdiag.navigation;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.eclipse.core.commands.AbstractHandler;
+import org.eclipse.core.commands.ExecutionEvent;
+import org.eclipse.core.commands.ExecutionException;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
+import org.eclipse.jface.dialogs.IDialogConstants;
+import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.papyrus.commands.wrappers.GMFtoEMFCommandWrapper;
+import org.eclipse.papyrus.infra.core.extension.commands.ICreationCommand;
+import org.eclipse.papyrus.infra.core.extension.commands.ICreationCondition;
+import org.eclipse.papyrus.infra.core.utils.BusinessModelResolver;
+import org.eclipse.papyrus.infra.core.utils.DiResourceSet;
+import org.eclipse.papyrus.infra.core.utils.EditorUtils;
+import org.eclipse.papyrus.infra.widgets.toolbox.dialog.InformationDialog;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.ui.PlatformUI;
+
+/**
+ * This command handler will try to create a diagram on the currently selected
+ * element, using navigation if necessary. The action is always available and
+ * the check is done in the run to avoid heavy navigation computation on each
+ * selection change.
+ * 
+ * @author mvelten
+ * 
+ */
+public abstract class CreateDiagramWithNavigationHandler extends AbstractHandler {
+
+	private ICreationCondition creationCondition;
+
+	private ICreationCommand creationCommand;
+
+	public CreateDiagramWithNavigationHandler(ICreationCommand creationCommand, ICreationCondition creationCondition) {
+		super();
+		this.creationCommand = creationCommand;
+		this.creationCondition = creationCondition;
+	}
+
+	@Override
+	public boolean isEnabled() {
+		return true;
+	}
+
+	public Object execute(ExecutionEvent event) throws ExecutionException {
+		NavigableElement navElement = getNavigableElementWhereToCreateDiagram();
+
+		if(navElement == null) {
+			InformationDialog dialog = new InformationDialog(Display.getCurrent().getActiveShell(), "Impossible diagram creation", "It is not possible to create this diagram on the selected element.", null, null, SWT.OK, MessageDialog.WARNING, new String[]{ IDialogConstants.OK_LABEL });
+			dialog.open();
+		} else {
+			createDiagram(navElement);
+		}
+		return null;
+	}
+
+	private NavigableElement getNavigableElementWhereToCreateDiagram() {
+		EObject selectedElement = getSelectedElement();
+
+		if(selectedElement != null) {
+			// First check if the current element can host the requested diagram
+			if(creationCondition.create(selectedElement)) {
+				return new ExistingNavigableElement(selectedElement, null);
+			} else {
+				List<NavigableElement> navElements = NavigationHelper.getInstance().getAllNavigableElements(selectedElement);
+				// this will sort elements by navigation depth
+				Collections.sort(navElements);
+
+				for(NavigableElement navElement : navElements) {
+					// ignore existing elements because we want a hierarchy to
+					// be created if it is not on the current element
+					if(navElement instanceof CreatedNavigableElement && creationCondition.create(navElement.getElement())) {
+						return navElement;
+					}
+				}
+			}
+		}
+		return null;
+	}
+
+	private void createDiagram(NavigableElement navElement) {
+		DiResourceSet diResourceSet = EditorUtils.getDiResourceSet();
+
+		if(navElement != null && diResourceSet != null) {
+			try {
+				CompositeCommand command = NavigationHelper.getLinkCreateAndOpenNavigableDiagramCommand(navElement, creationCommand, null, diResourceSet);
+				diResourceSet.getTransactionalEditingDomain().getCommandStack().execute(new GMFtoEMFCommandWrapper(command));
+			} catch (Exception e) {
+			}
+		}
+	}
+
+	private EObject getSelectedElement() {
+		ISelection selection = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getSelectionService().getSelection();
+		if(selection instanceof IStructuredSelection) {
+			Object obj = ((IStructuredSelection)selection).getFirstElement();
+			return resolveSemanticObject(obj);
+		}
+		return null;
+	}
+
+	/**
+	 * Resolve semantic element
+	 * 
+	 * @param object
+	 *        the object to resolve
+	 * @return <code>null</code> or the semantic element associated to the
+	 *         specified object
+	 */
+	protected EObject resolveSemanticObject(Object object) {
+		if(object instanceof EObject) {
+			return (EObject)object;
+		}
+		Object businessObject = BusinessModelResolver.getInstance().getBusinessModel(object);
+		if(businessObject instanceof EObject) {
+			return (EObject)businessObject;
+		}
+		return null;
+	}
+
+}