bundles/core/org.eclipse.apogy.core.topology.ui/src/org/eclipse/apogy/core/topology/ui/commands/ToggleVariableTopologyVisibilityCommandHandler.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency 
 * 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:
 *     Pierre Allard,
 *     Regent L'Archeveque,
 *     Olivier L. Larouche - initial API and implementation
 *
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.core.topology.ui.commands;

import java.util.Iterator;

import org.eclipse.apogy.core.invocator.Variable;
import org.eclipse.apogy.core.topology.ui.Activator;
import org.eclipse.apogy.core.topology.ui.ApogyCoreTopologyUIFacade;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.handlers.HandlerUtil;

// FIXME Refactor into E4 handler.
public class ToggleVariableTopologyVisibilityCommandHandler extends AbstractHandler implements
		IHandler {

	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException 
	{
		Iterator<?> selections = ((IStructuredSelection) HandlerUtil.getActiveMenuSelection(event)).iterator();

		while (selections.hasNext()) 
		{
			Object selection = selections.next();

			if (selection instanceof Variable) 
			{
				final Variable variable = (Variable) selection;
				
				Job job = new Job("Toggling Variable Visibility")
				{
					@Override
					protected IStatus run(IProgressMonitor monitor) 
					{
						try
						{			
							ApogyCoreTopologyUIFacade.INSTANCE.toggleVisibility(variable);
							return Status.OK_STATUS;
						}
						catch(Throwable t)
						{
							return new Status(IStatus.ERROR, Activator.ID, "Failed to toggle variable <" + variable.getName() + "> visibility !", t);
						}						
					}
				};
				job.schedule();				
			}
		}
		return null;
	}
}