org.eclipse.osbp.vaaclipse.addons.perspective/src/org/eclipse/osbp/vaaclipse/addons/perspective/handler/DeletePerspectiveHandler.java

/**
 * Copyright (c) 2011, 2014 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 * 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: 
 * 		Florian Pirchner - Initial implementation
 */
package org.eclipse.osbp.vaaclipse.addons.perspective.handler;

import javax.inject.Inject;
import javax.inject.Named;

import org.eclipse.e4.core.contexts.Active;
import org.eclipse.e4.core.di.annotations.CanExecute;
import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.model.application.ui.MContext;
import org.eclipse.e4.ui.model.application.ui.advanced.MPerspective;
import org.eclipse.e4.ui.model.application.ui.advanced.MPerspectiveStack;
import org.eclipse.e4.ui.model.application.ui.menu.MItem;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.osbp.vaaclipse.addons.application.handler.AbstractHandler;
import org.eclipse.osbp.vaaclipse.publicapi.perspective.IPerspectiveHandler;

/**
 * The Class DeletePerspectiveHandler.
 */
public class DeletePerspectiveHandler extends AbstractHandler {

	/** The handler. */
	@Inject
	private IPerspectiveHandler handler;

	/** The user id. */
	@Inject
	@Optional
	@Named("userId")
	private String userId;

	/**
	 * Execute.
	 *
	 * @param context
	 *            the context
	 * @param perspective
	 *            the perspective
	 * @param item
	 *            the item
	 */
	@Execute
	public void execute(@Active MContext context,
			@Active MPerspective perspective, @Active MItem item) {
		MPerspectiveStack stack = (MPerspectiveStack) ((EObject) perspective)
				.eContainer();
		if (handler.deletePerspective(userId, perspective)) {
			// select the first perspective in the stack
			if (stack.getSelectedElement() == null
					&& !stack.getChildren().isEmpty()) {
				stack.setSelectedElement(stack.getChildren().get(0));
			}
		}
	}

	/**
	 * Can execute.
	 *
	 * @param perspective
	 *            the perspective
	 * @return true, if successful
	 */
	@CanExecute
	public boolean canExecute(@Active MPerspective perspective) {
		return handler.canDeletePerspective(userId, perspective);
	}
}