# Implementing Undo/Redo Actions with the Operation History

The workspace editing domain API provides convenient specializations of the EMF.Edit UI framework's undo and redo actions, that delegate to the Eclipse Operation History API's undo/redo action handlers.

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The UndoActionWrapper and RedoActionWrapper classes provide replacements for EMF's undo/redo actions that delegate to the operation history API's action handlers. These wrappers create undo/redo action handlers on the undo context obtained by adapting the active editor part to the IUndoContext type. Usually this undo context is a resource context.

Copyright (c) 2006 IBM Corporation and others.