// $Id: CommandStackImpl.java 13421 2007-08-20 17:04:35Z b00__1 $
// Copyright (c) 2007, The ArgoUML Project
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//
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// modification, are permitted provided that the following conditions are met:
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//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
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package org.argouml.model.euml;

//import org.argouml.model.CommandStack;

/**
 * CommandStack implementation to support Undo/Redo.
 * 
 */
public class CommandStackImpl /*implements CommandStack*/ {

    private EUMLModelImplementation modelImplementation;

    public CommandStackImpl(EUMLModelImplementation implementation) {
        modelImplementation = implementation;
        implementation.getEditingDomain().getCommandStack().flush();
    }

    public boolean canRedo() {
        return modelImplementation.getEditingDomain().getCommandStack()
                .canRedo();
    }

    public boolean canUndo() {
        return modelImplementation.getEditingDomain().getCommandStack()
                .canUndo();
    }

    public String getRedoLabel() {
        return canRedo() ? modelImplementation.getEditingDomain()
                        .getCommandStack().getRedoCommand().getLabel()
                : null;
    }

    public String getUndoLabel() {
        return canUndo() ? modelImplementation.getEditingDomain()
                        .getCommandStack().getUndoCommand().getLabel()
                : null;
    }

    public boolean isCommandStackCapabilityAvailable() {
        return true;
    }

    public void redo() {
        modelImplementation.getEditingDomain().getCommandStack().redo();
    }

    public void undo() {
        modelImplementation.getEditingDomain().getCommandStack().undo();
    }

}