Add further support for enabling kernel events

[deliverable/tracecompass.git] / org.eclipse.linuxtools.lttng.ui / src / org / eclipse / linuxtools / lttng / ui / views / control / handlers / BaseControlViewHandler.java

/**********************************************************************
 * Copyright (c) 2012 Ericsson
 * 
 * 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: 
 *   Bernd Hufmann - Initial API and implementation
 **********************************************************************/
package org.eclipse.linuxtools.lttng.ui.views.control.handlers;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.linuxtools.lttng.ui.views.control.ControlView;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

/**
 * <b><u>BaseControlViewHandler</u></b>
 * <p>
 * Abstract Command handler implementation for all control view handlers.
 * </p>
 */
abstract public class BaseControlViewHandler extends AbstractHandler {

    // ------------------------------------------------------------------------
    // Operations
    // ------------------------------------------------------------------------
    /**
     * @return returns the workbench page for the Control View
     */
    protected IWorkbenchPage getWorkbenchPage() {
        // Check if we are closing down
        IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
        if (window == null) {
            return null;
        }

        // Check if we are in the Project View
        IWorkbenchPage page = window.getActivePage();
        if (page == null) {
            return null;
        }

        IWorkbenchPart part = page.getActivePart();
        if (!(part instanceof ControlView)) {
            return null;
        }
        return page;
    }
}