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.ui.IWorkbenchSite;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.wst.jsdt.core.IField;
  import org.eclipse.wst.jsdt.core.ILocalVariable;
  import org.eclipse.wst.jsdt.core.search.IJavaScriptSearchConstants;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  import org.eclipse.wst.jsdt.internal.ui.JavaPluginImages;
  import org.eclipse.wst.jsdt.internal.ui.javaeditor.JavaEditor;
  import org.eclipse.wst.jsdt.internal.ui.search.SearchMessages;
  
  /**
   * Finds field write accesses of the selected element in the workspace.
   * The action is applicable to selections representing a JavaScript element.
   * 
   * <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 FindWriteReferencesAction extends FindReferencesAction {
  
  	/**
  	 * Creates a new <code>FindWriteReferencesAction</code>. The action 
  	 * requires that the selection provided by the site's selection provider is of type 
  	 * <code>org.eclipse.jface.viewers.IStructuredSelection</code>.
  	 * 
  	 * @param site the site providing context information for this action
  	 */
  	public FindWriteReferencesAction(IWorkbenchSite site) {
  		super(site);
  	}
  
  	/**
  	 * Note: This constructor is for internal use only. Clients should not call this constructor.
  	 * @param editor the JavaScript editor
  	 */
  	public FindWriteReferencesAction(JavaEditor editor) {
  		super(editor);
  	}
  	
  	Class[] getValidTypes() {
  		return new Class[] { IField.class, ILocalVariable.class };
  	}
  	
  	void init() {
  		setText(SearchMessages.Search_FindWriteReferencesAction_label); 
  		setToolTipText(SearchMessages.Search_FindWriteReferencesAction_tooltip); 
  		setImageDescriptor(JavaPluginImages.DESC_OBJS_SEARCH_REF);
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.FIND_WRITE_REFERENCES_IN_WORKSPACE_ACTION);
  	}
  
  	int getLimitTo() {
  		return IJavaScriptSearchConstants.WRITE_ACCESSES;
  	}	
  
  	String getOperationUnavailableMessage() {
  		return SearchMessages.JavaElementAction_operationUnavailable_field; 
  	}
  }
  