abbot.editor.actions
Class CommandHistory

java.lang.Object
  abbot.editor.actions.CommandHistory

public class CommandHistory
extends Object

Keep a history of commands, enabling potentially unlimited undo. This class is not synchronized.

Note that undo is itself an undoable action.

Constructor Summary

CommandHistory()

Method Summary

void	add(Command command) Add the given command to the command history.
boolean	canUndo()
void	clear()
void	undo()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CommandHistory

public CommandHistory()

Method Detail

canUndo

public boolean canUndo()

undo

public void undo()
          throws NoUndoException

Throws:

NoUndoException

add

public void add(Command command)

Add the given command to the command history.

clear

public void clear()