content: /*******************************************************************************
   * Copyright (c) 2000, 2008 IBM Corporation 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:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.ui.actions;
  
  import org.eclipse.core.resources.ResourcesPlugin;
  import org.eclipse.core.runtime.IAdaptable;
  import org.eclipse.jface.action.Action;
  import org.eclipse.ui.IWorkbench;
  import org.eclipse.ui.IWorkbenchPage;
  import org.eclipse.ui.IWorkbenchWindow;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.ui.WorkbenchException;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
  import org.eclipse.wst.jsdt.internal.ui.actions.ActionMessages;
  import org.eclipse.wst.jsdt.internal.ui.util.ExceptionHandler;
  import org.eclipse.wst.jsdt.ui.JavaScriptUI;
  
  /**
   * Action to programmatically open a JavaScript perspective.
   * 
   * <p>
   * This class may be instantiated; it is not intended to be subclassed.
   * </p>
   * 
   *
   * Provisional API: This class/interface is part of an interim API that is still under development and expected to
   * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
   * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
   * (repeatedly) as the API evolves.
   */
  public class OpenJavaPerspectiveAction extends Action {
  
  	/**
  	 * Create a new <code>OpenJavaPerspectiveAction</code>.
  	 */
  	public OpenJavaPerspectiveAction() {
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.OPEN_JAVA_PERSPECTIVE_ACTION);
  	}
  
  	public void run() {
  		IWorkbench workbench= JavaScriptPlugin.getDefault().getWorkbench();
  		IWorkbenchWindow window= workbench.getActiveWorkbenchWindow();
  		IWorkbenchPage page= window.getActivePage();
  		IAdaptable input;
  		if (page != null)
  			input= page.getInput();
  		else
  			input= ResourcesPlugin.getWorkspace().getRoot();
  		try {
  			workbench.showPerspective(JavaScriptUI.ID_PERSPECTIVE, window, input);
  		} catch (WorkbenchException e) {
  			ExceptionHandler.handle(e, window.getShell(), 
  				ActionMessages.OpenJavaPerspectiveAction_dialog_title, 
  				ActionMessages.OpenJavaPerspectiveAction_error_open_failed); 
  		}
  	}
  }
  