/*

  * Copyright 2004-2008 the Seasar Foundation and the Others.

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 

  * either express or implied. See the License for the specific language

  * governing permissions and limitations under the License.

  */

 package org.seasar.eclipse.common.action;

 import org.eclipse.core.resources.IResource;

 import org.eclipse.jface.action.IAction;

 import org.eclipse.jface.viewers.ISelection;

 import org.eclipse.jface.viewers.IStructuredSelection;

 import org.eclipse.ui.IEditorActionDelegate;

 import org.eclipse.ui.IEditorPart;

 import org.seasar.eclipse.common.util.AdaptableUtil;

 /**

  * @author taichi

  * 

  */

 public abstract class AbstractEditorActionDelegate implements

         IEditorActionDelegate {

     protected IEditorPart editorPart;

     protected IResource resource;

     /*

      * (non-Javadoc)

      * 

      * @see org.eclipse.ui.IEditorActionDelegate#setActiveEditor(org.eclipse.jface.action.IAction,

      *      org.eclipse.ui.IEditorPart)

      */

     public void setActiveEditor(IAction action, IEditorPart targetEditor) {

         this.editorPart = targetEditor;

         if (targetEditor != null) {

             this.resource = AdaptableUtil.toResource(targetEditor

                     .getEditorInput());

         }

     }

     /*

      * (non-Javadoc)

      * 

      * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction,

      *      org.eclipse.jface.viewers.ISelection)

      */

     public void selectionChanged(IAction action, ISelection selection) {

         if (selection instanceof IStructuredSelection

                 && selection.isEmpty() == false) {

             IStructuredSelection struct = (IStructuredSelection) selection;

             Object o = struct.getFirstElement();

             if (o instanceof IResource) {

                 this.resource = (IResource) o;

             }

         }

     }

 }