BufferUndoListener (jEdit API Documentation)

```
public interface BufferUndoListener
```
A interface for notification of buffer undo/redo actions. This interface makes it easier for undo-aware plugins to process undo/redo actions in a buffer. Buffer undo listeners are added and removed from a buffer using JEditBuffer.addBufferUndoListener and JEditBuffer.removeBufferUndoListener, respectively.

Since:

jEdit 4.3pre18

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`beginRedo(JEditBuffer buffer)`	Called when a redo on the buffer begins.
`void`	`beginUndo(JEditBuffer buffer)`	Called when an undo operation on the buffer begins.
`void`	`endRedo(JEditBuffer buffer)`	Called when a redo on the buffer ends.
`void`	`endUndo(JEditBuffer buffer)`	Called when an undo operation on the buffer ends.

- Method Detail
  - beginUndo
```
void beginUndo(JEditBuffer buffer)
```
    Called when an undo operation on the buffer begins.
    
    Parameters:
    
    buffer - The buffer in question
  - endUndo
```
void endUndo(JEditBuffer buffer)
```
    Called when an undo operation on the buffer ends.
    
    Parameters:
    
    buffer - The buffer in question
  - beginRedo
```
void beginRedo(JEditBuffer buffer)
```
    Called when a redo on the buffer begins.
    
    Parameters:
    
    buffer - The buffer in question
  - endRedo
```
void endRedo(JEditBuffer buffer)
```
    Called when a redo on the buffer ends.
    
    Parameters:
    
    buffer - The buffer in question