ui/org.eclipse.pde.ui.tests/Macro UI/org/eclipse/pde/internal/ui/tests/macro/PlaybackAction.java

/*******************************************************************************
 * Copyright (c) 2000, 2005 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.pde.internal.ui.tests.macro;

import java.io.InputStream;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;

/**
 * Our sample action implements workbench action delegate.
 * The action proxy will be created by the workbench and
 * shown in the UI. When the user tries to use the action,
 * this delegate will be created and execution will be 
 * delegated to it.
 * @see IWorkbenchWindowActionDelegate
 */
public class PlaybackAction implements IWorkbenchWindowActionDelegate {
	private IWorkbenchWindow window;
	/**
	 * The constructor.
	 */
	public PlaybackAction() {
	}

	/**
	 * The action has been activated. The argument of the
	 * method represents the 'real' action sitting
	 * in the workbench UI.
	 * @see IWorkbenchWindowActionDelegate#run
	 */
	public void run(IAction action) {
		ISelection selection = window.getSelectionService().getSelection();
		if (selection instanceof IStructuredSelection) {
			IStructuredSelection ssel = (IStructuredSelection)selection;
			Object el = ssel.getFirstElement();
			if (el instanceof IFile) {
				action.setEnabled(false);
				runFile((IFile)el);
				action.setEnabled(true);
			}
		}
	}

	private void runFile(IFile file) {
		try {
			InputStream is = file.getContents();
			MacroManager mng = MacroPlugin.getDefault().getMacroManager();
			mng.setIndexHandler(new DefaultIndexHandler());
			mng.play(window.getShell().getDisplay(), window, file.getName(), is);
			mng.setIndexHandler(null);
		}
		catch (CoreException e) {
			MacroPlugin.logException(e);
		}
	}

	/**
	 * Selection in the workbench has been changed. We 
	 * can change the state of the 'real' action here
	 * if we want, but this can only happen after 
	 * the delegate has been created.
	 * @see IWorkbenchWindowActionDelegate#selectionChanged
	 */
	public void selectionChanged(IAction action, ISelection selection) {
	}

	/**
	 * We can use this method to dispose of any system
	 * resources we previously allocated.
	 * @see IWorkbenchWindowActionDelegate#dispose
	 */
	public void dispose() {
	}

	/**
	 * We will cache window object in order to
	 * be able to provide parent shell for the message dialog.
	 * @see IWorkbenchWindowActionDelegate#init
	 */
	public void init(IWorkbenchWindow window) {
		this.window = window;
	}
}