PasteBreakpointsAction


1   /*******************************************************************************
2    * Copyright (c) 2000, 2005 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.debug.internal.ui.actions.breakpointGroups;
12  
13  import java.util.List  ;
14  
15  import org.eclipse.debug.internal.ui.IDebugHelpContextIds;
16  import org.eclipse.debug.internal.ui.views.breakpoints.BreakpointContainer;
17  import org.eclipse.debug.internal.ui.views.breakpoints.BreakpointsView;
18  import org.eclipse.debug.internal.ui.views.breakpoints.OtherBreakpointCategory;
19  import org.eclipse.jface.viewers.IStructuredSelection;
20  import org.eclipse.ui.PlatformUI;
21  import org.eclipse.ui.views.navigator.LocalSelectionTransfer;
22  
23  /**
24   * Standard action for pasting resources on the clipboard to the selected resource's location.
25   * <p>
26   * This class may be instantiated; it is not intended to be subclassed.
27   * </p>
28   * 
29   * @since 2.0
30   */
31  public class PasteBreakpointsAction extends BreakpointSelectionAction {
32      
33      /**
34       * Creates a new action.
35       *
36       * @param view the view of this action
37       */
38      public PasteBreakpointsAction(BreakpointsView view) {
39          super(BreakpointGroupMessages.PasteBreakpointsAction_0, view); 
40          setToolTipText(BreakpointGroupMessages.PasteBreakpointsAction_1);
41          PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IDebugHelpContextIds.PASTE_BREAKPOINTS_ACTION);
42      }
43  
44      /**
45       * Returns the actual target of the paste action. Returns null
46       * if no valid target is selected.
47       * 
48       * @return the actual target of the paste action
49       */
50      private Object   getTarget() {
51          List   selectedNonResources = getSelectedNonResources();
52          if (selectedNonResources.size() == 1) {
53              Object   target = selectedNonResources.get(0);
54              if (target instanceof BreakpointContainer) {
55                  return target;
56              }
57          }
58          return null;
59      }
60  
61      /**
62       * Implementation of method defined on <code>IAction</code>.
63       */
64      public void run() {
65          if (getBreakpointsView().canPaste(getTarget(), LocalSelectionTransfer.getInstance().getSelection())) {
66              getBreakpointsView().performPaste(getTarget(), LocalSelectionTransfer.getInstance().getSelection());
67          }
68      }
69  
70      /**
71       * Returns whether this action should be enabled based on the selection
72       * in the clipboard. Only updates when the breakpoints view has focus. 
73       */
74      protected boolean updateSelection(IStructuredSelection selection) {
75          // can't paste into "Others" (only move)
76          Object   target = getTarget();
77          if (target instanceof BreakpointContainer) {
78              BreakpointContainer container = (BreakpointContainer) target;
79              if (container.getCategory() instanceof OtherBreakpointCategory) {
80                  return false;
81              }
82              return true;
83          }
84          // don't access clipboard - causes Hang -see bug 84870
85          return false;
86      }
87  }
88
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