Class UndoManager

java.lang.Object

org.aesh.readline.undo.UndoManager

public class UndoManager
extends Object

Manages a stack of undo actions for line editing operations.

Author:

Ståle W. Pedersen

Constructor Summary

Constructors

Constructor	Description
UndoManager()	Creates a new UndoManager with an empty undo stack.

Method Summary

Modifier and Type	Method	Description
void	addUndo(UndoAction u)	Adds an undo action to the stack.
void	clear()	Clears all undo actions from the stack.
UndoAction	getNext()	Retrieves and removes the next undo action from the stack.
boolean	isEmpty()	Checks if the undo stack is empty.
int	size()	Returns the number of undo actions in the stack.

Methods inherited from class Object

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

Constructor Details

UndoManager

public UndoManager()

Creates a new UndoManager with an empty undo stack.

Method Details

getNext

public UndoAction getNext()

Retrieves and removes the next undo action from the stack.

Returns:

the next undo action, or null if the stack is empty

addUndo

public void addUndo(UndoAction u)

Adds an undo action to the stack. If the stack exceeds its maximum size, the oldest action is removed.

Parameters:

u - the undo action to add

clear

public void clear()

Clears all undo actions from the stack.

isEmpty

public boolean isEmpty()

Checks if the undo stack is empty.

Returns:

true if there are no undo actions, false otherwise

size

public int size()

Returns the number of undo actions in the stack.

Returns:

the number of undo actions