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.internal.ui.text.correction;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Iterator;
  import java.util.List;
  
  import org.eclipse.ui.IWorkbench;
  import org.eclipse.ui.LegacyHandlerSubmissionExpression;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.ui.commands.ICommandService;
  import org.eclipse.ui.handlers.IHandlerActivation;
  import org.eclipse.ui.handlers.IHandlerService;
  import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
  import org.eclipse.wst.jsdt.internal.ui.javaeditor.CompilationUnitEditor;
  
  public class CorrectionCommandInstaller {
  	
  	/**
  	 * All correction commands must start with the following prefix.
  	 */
  	public static final String COMMAND_PREFIX= "org.eclipse.wst.jsdt.ui.correction."; //$NON-NLS-1$
  	
  	/**
  	 * Commands for quick assist must have the following suffix.
  	 */
  	public static final String ASSIST_SUFFIX= ".assist"; //$NON-NLS-1$
  	
  	private List fCorrectionHandlerActivations;
  	
  	public CorrectionCommandInstaller() {
  		fCorrectionHandlerActivations= null;
  	}
  	
  	public void registerCommands(CompilationUnitEditor editor) {
  		IWorkbench workbench= PlatformUI.getWorkbench();
  		ICommandService commandService= (ICommandService) workbench.getAdapter(ICommandService.class);
  		IHandlerService handlerService= (IHandlerService) workbench.getAdapter(IHandlerService.class);
  		if (commandService == null || handlerService == null) {
  			return;
  		}
  		
  		if (fCorrectionHandlerActivations != null) {
  			JavaScriptPlugin.logErrorMessage("correction handler activations not released"); //$NON-NLS-1$
  		}
  		fCorrectionHandlerActivations= new ArrayList();
  		
  		Collection definedCommandIds= commandService.getDefinedCommandIds();
  		for (Iterator iter= definedCommandIds.iterator(); iter.hasNext();) {
  			String id= (String) iter.next();
  			if (id.startsWith(COMMAND_PREFIX)) {
  				boolean isAssist= id.endsWith(ASSIST_SUFFIX);
  				CorrectionCommandHandler handler= new CorrectionCommandHandler(editor, id, isAssist);
  				IHandlerActivation activation= handlerService.activateHandler(id, handler, new LegacyHandlerSubmissionExpression(null, null, editor.getSite()));
  				fCorrectionHandlerActivations.add(activation);
  			}
  		}
  	}
  	
  	public void deregisterCommands() {
  		IHandlerService handlerService= (IHandlerService) PlatformUI.getWorkbench().getAdapter(IHandlerService.class);
  		if (handlerService != null && fCorrectionHandlerActivations != null) {
  			handlerService.deactivateHandlers(fCorrectionHandlerActivations);
  			fCorrectionHandlerActivations= null;
  		}
  	}
  
  }
  