| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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.gef.commands; |
| |
| import java.util.ListIterator; |
| |
| /** |
| * A CompoundCommand that performs undo on its contained Commands in the same |
| * order in which they were executed. |
| */ |
| public class ForwardUndoCompoundCommand extends CompoundCommand { |
| |
| /** |
| * Constructs a ForwardUndoCompoundCommand with no label |
| */ |
| public ForwardUndoCompoundCommand() { |
| } |
| |
| /** |
| * Constructs a ForwardUndoCompoundCommand with the specified label |
| * |
| * @param label |
| * the label |
| */ |
| public ForwardUndoCompoundCommand(String label) { |
| super(label); |
| } |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#getDebugLabel() |
| */ |
| public String getDebugLabel() { |
| return "ForwardUndoCommand: " + super.getDebugLabel();//$NON-NLS-1$ |
| } |
| |
| /** |
| * Undo the command. For a Preorder compound command this means undoing all |
| * of the commands that it contains. Do it in the same order as applied. |
| */ |
| public void undo() { |
| ListIterator itr = getCommands().listIterator(); |
| try { |
| while (itr.hasNext()) { |
| ((Command) itr.next()).undo(); |
| } |
| } catch (RuntimeException e) { |
| itr.previous(); // Skip over the one that failed. It cleaned itself |
| // up. |
| while (itr.hasPrevious()) { |
| ((Command) itr.previous()).redo(); |
| } |
| throw e; |
| } |
| } |
| |
| } |