org.eclipse.tm.te.ui.views.handler.OpenCommandHandler.java Source code

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Here is the source code for org.eclipse.tm.te.ui.views.handler.OpenCommandHandler.java

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/*******************************************************************************
 * Copyright (c) 2011 Wind River Systems, Inc. and others. 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:
 * Wind River Systems - initial API and implementation
 *******************************************************************************/
package org.eclipse.tm.te.ui.views.handler;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.Command;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.tm.te.ui.views.activator.UIPlugin;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.commands.ICommandService;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.navigator.CommonNavigator;

/**
 * TCF tree elements open command handler implementation.
 */
public class OpenCommandHandler extends AbstractHandler {

    /* (non-Javadoc)
     * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
     */
    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        // The selection is the Target Explorer tree selection
        ISelection selection = HandlerUtil.getCurrentSelection(event);
        // The active part is the Target Explorer view instance
        IWorkbenchPart part = HandlerUtil.getActivePart(event);

        if (selection instanceof IStructuredSelection && !selection.isEmpty() && part instanceof CommonNavigator) {
            // If the tree node is expandable, expand or collapse it
            TreeViewer viewer = ((CommonNavigator) part).getCommonViewer();
            Object element = ((IStructuredSelection) selection).getFirstElement();
            if (viewer.isExpandable(element)) {
                viewer.setExpandedState(element, !viewer.getExpandedState(element));
            } else {
                // Node is not an expandable node, forward to the properties action.
                ICommandService service = (ICommandService) PlatformUI.getWorkbench()
                        .getService(ICommandService.class);
                Command command = service != null ? service.getCommand(ActionFactory.PROPERTIES.getCommandId())
                        : null;
                if (command != null && command.isDefined() && command.isEnabled()) {
                    try {
                        command.executeWithChecks(event);
                    } catch (Exception e) {
                        // If the platform is in debug mode, we print the exception to the log view
                        if (Platform.inDebugMode()) {
                            IStatus status = new Status(IStatus.ERROR, UIPlugin.getUniqueIdentifier(),
                                    e.getLocalizedMessage(), e);
                            UIPlugin.getDefault().getLog().log(status);
                        }
                    }
                }
            }
        }

        return null;
    }

}