org.fife.ui.rtextarea

Class RUndoManager

java.lang.Object

javax.swing.undo.AbstractUndoableEdit

javax.swing.undo.CompoundEdit

javax.swing.undo.UndoManager

org.fife.ui.rtextarea.RUndoManager

All Implemented Interfaces:

Serializable, EventListener, UndoableEditListener, UndoableEdit

public class RUndoManager
extends UndoManager

This class manages undos/redos for a particular editor pane. It groups all undos that occur one character position apart together, to avoid Java's horrible "one character at a time" undo behavior. It also recognizes "replace" actions (i.e., text is selected, then the user types), and treats it as a single action, instead of a remove/insert action pair.

Version:

1.0

Author:

Robert Futrell

See Also:

Serialized Form

Field Summary

Fields inherited from class javax.swing.undo.CompoundEdit

edits

Fields inherited from class javax.swing.undo.AbstractUndoableEdit

RedoName, UndoName

Constructor Summary

Constructors

Constructor and Description
RUndoManager(RTextArea textArea) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	beginInternalAtomicEdit() Begins an "atomic" edit.
void	endInternalAtomicEdit() Ends an "atomic" edit.
String	getCantRedoText() Returns the localized "Can't Redo" string.
String	getCantUndoText() Returns the localized "Can't Undo" string.
void	redo()
void	undo()
void	undoableEditHappened(UndoableEditEvent e)
void	updateActions() Ensures that undo/redo actions are enabled appropriately and have descriptive text at all times.

Methods inherited from class javax.swing.undo.UndoManager

addEdit, canRedo, canUndo, canUndoOrRedo, discardAllEdits, editToBeRedone, editToBeUndone, end, getLimit, getRedoPresentationName, getUndoOrRedoPresentationName, getUndoPresentationName, redoTo, setLimit, toString, trimEdits, trimForLimit, undoOrRedo, undoTo

Methods inherited from class javax.swing.undo.CompoundEdit

die, getPresentationName, isInProgress, isSignificant, lastEdit

Methods inherited from class javax.swing.undo.AbstractUndoableEdit

replaceEdit

Methods inherited from class java.lang.Object

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

Constructor Detail

RUndoManager

public RUndoManager(RTextArea textArea)

Constructor.

Parameters:

textArea - The parent text area.

Method Detail

beginInternalAtomicEdit

public void beginInternalAtomicEdit()

Begins an "atomic" edit. This method is called when RTextArea KNOWS that some edits should be compound automatically, such as when the user is typing in overwrite mode (the deletion of the current char + insertion of the new one) or the playing back of a macro.

See Also:

endInternalAtomicEdit()

endInternalAtomicEdit

public void endInternalAtomicEdit()

Ends an "atomic" edit.

See Also:

beginInternalAtomicEdit()

getCantRedoText

public String getCantRedoText()

Returns the localized "Can't Redo" string.

Returns:

The localized "Can't Redo" string.

See Also:

getCantUndoText()

getCantUndoText

public String getCantUndoText()

Returns the localized "Can't Undo" string.

Returns:

The localized "Can't Undo" string.

See Also:

getCantRedoText()

redo

public void redo()
          throws CannotRedoException

Specified by:

redo in interface UndoableEdit

Overrides:

redo in class UndoManager

Throws:

CannotRedoException

undo

public void undo()
          throws CannotUndoException

Specified by:

undo in interface UndoableEdit

Overrides:

undo in class UndoManager

Throws:

CannotUndoException

undoableEditHappened

public void undoableEditHappened(UndoableEditEvent e)

Specified by:

undoableEditHappened in interface UndoableEditListener

Overrides:

undoableEditHappened in class UndoManager

updateActions

public void updateActions()

Ensures that undo/redo actions are enabled appropriately and have descriptive text at all times.