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/*****************************************************************************
 * Copyright (c) 2010 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:
 *  CEA LIST - Initial API and implementation
 *
 *****************************************************************************/
package org.eclipse.papyrus.marte.textedit.stereotypeapplicationwithvsl.xtext.ui.contributions;

import java.util.Iterator;
import java.util.List;
import java.util.Vector;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.uml2.uml.Element;

public class OpenTextualEditorForStereotypeApplications extends AbstractHandler implements IObjectActionDelegate {

	public OpenTextualEditorForStereotypeApplications() {
		// TODO Auto-generated constructor stub
	}


	/**
	 * {@inheritDoc}
	 */
	@Override
	public Object execute(ExecutionEvent event) {
		Display current = Display.getCurrent();

		if(current == null) {
			current = Display.getDefault();
		}
		Shell shell = current.getActiveShell();

		if(shell != null) {
			updateSelectedEObject();
		} else {
			// Activator.log.error("impossible to find a shell to open the message dialog", null);
		}

		return null;
	}

	/**
	 * Convert each selected elements from the explorator menu, or modeling view
	 * to an EObject and add it to a list
	 *
	 * @return list of EObject
	 */
	public void updateSelectedEObject() {
		Vector<EObject> currentSelectedEObjects = new Vector<EObject>();

		// Retrieve selected elements
		IWorkbenchWindow activeWorkbenchWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
		if (activeWorkbenchWindow != null){
			IStructuredSelection selection = (IStructuredSelection)activeWorkbenchWindow.getSelectionService().getSelection();
			Iterator<?> eltIt = selection.iterator();

			while(eltIt.hasNext()) {
				Object currentObject = eltIt.next();

				// If the object is an edit part, try to get semantic bridge
				if(currentObject instanceof GraphicalEditPart) {
					GraphicalEditPart editPart = (GraphicalEditPart)currentObject;
					EObject semantic = EMFHelper.getEObject(editPart);
					if(semantic instanceof Element) {
						//FIXME: The new XText integration doesn't support direct dialog creation on an edit part (The TextAwareEditPart is supposed to handle this case itself)
						//DirectEditManager manager = new StereotypeApplicationPopupEditorConfigurationContribution().createDirectEditManager(editPart);
					}
				}

				// check whether part of model explorer
				if(currentObject instanceof IAdaptable) {
					// modisco ModelElementItem supports IAdaptable (cleaner than cast / dependency with modisco)
					currentObject = ((IAdaptable)currentObject).getAdapter(EObject.class);
				}

				// If element is a UML Element
				if(currentObject instanceof Element) {
					currentSelectedEObjects.add((EObject)currentObject);
				}
			}			
		}

		selectedEObjects = currentSelectedEObjects;
	}

	/**
	 * Convert each selected elements from the explorator menu, or modeling view
	 * to an EObject and add it to a list
	 *
	 * @return list of EObject
	 */
	public EObject getSelectedEObject() {
		if(selectedEObjects.size() > 0) {
			return selectedEObjects.get(0);
		}
		return null;
	}

	public List<EObject> getSelectedEObjects() {
		return selectedEObjects;
	}

	private List<EObject> selectedEObjects;


	@Override
	public void run(IAction action) {
		// TODO Auto-generated method stub
		this.execute(null);
	}


	@Override
	public void selectionChanged(IAction action, ISelection selection) {
	}


	@Override
	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
	}

}

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