org.xbup.io.command.undo

Class XBTLinearUndo

java.lang.Object

org.xbup.io.command.undo.XBTLinearUndo

public class XBTLinearUndo
extends java.lang.Object

Linear undo command sequence storage.

Version:

0.1 wr20.0 2010/09/15

Author:

XBUP Project (http://xbup.org)

Constructor Summary

Constructors

Constructor and Description
XBTLinearUndo(XBTTreeDocument document) Creates a new instance

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canRedo()
boolean	canUndo()
void	clear()
void	doSync() Perform revert to sync point
java.lang.String	getDesc(XBTCommand undoStep)
long	getMaxSize()
long	getMaxUndo()
long	getSyncPoint()
long	getUsedSize()
void	performRedo() Perform single redo step
void	performRedo(int count)
void	performStep(XBTCommand step) Add new step into revert list
void	performUndo() Perform single undo step
void	performUndo(int count)
void	setMaxSize(long maxSize)
void	setMaxUndo(long maxUndo)
void	setSyncPoint()
void	setSyncPoint(long syncPoint)

Methods inherited from class java.lang.Object

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

Constructor Detail

XBTLinearUndo

public XBTLinearUndo(XBTTreeDocument document)

Creates a new instance

Method Detail

performStep

public void performStep(XBTCommand step)
                 throws java.lang.Exception

Add new step into revert list

Throws:

java.lang.Exception

performUndo

public void performUndo()
                 throws java.lang.Exception

Perform single undo step

Throws:

java.lang.Exception

performRedo

public void performRedo()
                 throws java.lang.Exception

Perform single redo step

Throws:

java.lang.Exception

performUndo

public void performUndo(int count)
                 throws java.lang.Exception

Throws:

java.lang.Exception

performRedo

public void performRedo(int count)
                 throws java.lang.Exception

Throws:

java.lang.Exception

clear

public void clear()

canUndo

public boolean canUndo()

canRedo

public boolean canRedo()

getMaxUndo

public long getMaxUndo()

doSync

public void doSync()

Perform revert to sync point

setMaxUndo

public void setMaxUndo(long maxUndo)

getMaxSize

public long getMaxSize()

getDesc

public java.lang.String getDesc(XBTCommand undoStep)

setMaxSize

public void setMaxSize(long maxSize)

getUsedSize

public long getUsedSize()

getSyncPoint

public long getSyncPoint()

setSyncPoint

public void setSyncPoint(long syncPoint)

setSyncPoint

public void setSyncPoint()