/*******************************************************************************
 * Copyright (c) 2011 University of Mannheim: Chair for Software Engineering
 * 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:
 *    Ralph Gerbig - initial API and implementation and initial documentation
 *******************************************************************************/

package de.uni_mannheim.informatik.swt.models.plm.diagram.custom.menucontributions;

import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

import de.uni_mannheim.informatik.swt.models.plm.diagram.edit.parts.ConnectionEditPart;
import de.uni_mannheim.informatik.swt.models.plm.diagram.edit.parts.EntityEditPart;


/**
 * 
 * @author Ralph Gerbig (rgerbig@rumms.uni-mannheim.de)
 *
 *
 */
public class DSLAction implements IObjectActionDelegate {

	public final static String ID = "de.uni_mannheim.informatik.swt.models.plm.diagram.custom.toggledomainconnectionationaction";
	
	private IGraphicalEditPart selectedElement;
	
	public DSLAction()  {
		// TODO Auto-generated constructor stub
	}

	/**
	 * Reads the rendering information attached to the ontology. If no information
	 * is present it will be created. After reading the information of collapsedDomainConnections
	 * Field it is decided whether the ID of the connection will be removed or added to the
	 * connection. In the end the visual state of the DomainConnectionEditPart is changed.
	 */
	@Override
	public void run(IAction action) {
		
		if (selectedElement == null)
			return;
		
		if (selectedElement instanceof EntityEditPart)
			((EntityEditPart)selectedElement).updateDSL();
		if (selectedElement instanceof ConnectionEditPart)
			((ConnectionEditPart)selectedElement).updateView();
		
	}	
	@Override
	public void selectionChanged(IAction action, ISelection selection) {
		selectedElement = null;
		if (selection instanceof IStructuredSelection) 
		{
			IStructuredSelection structuredSelection = (IStructuredSelection) selection;
			if (structuredSelection.getFirstElement() instanceof EntityEditPart 
					|| structuredSelection.getFirstElement() instanceof ConnectionEditPart) 
			{
				selectedElement = (IGraphicalEditPart) structuredSelection.getFirstElement();
			}
		}
	}

	@Override
	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
		// TODO Auto-generated method stub
		
	}

}