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- // Copyright 2013 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef COMPONENTS_UNDO_UNDO_OPERATION_H_
- #define COMPONENTS_UNDO_UNDO_OPERATION_H_
- // Base class for all undo operations.
- class UndoOperation {
- public:
- virtual ~UndoOperation() {}
- virtual void Undo() = 0;
- // Returns the resource string id describing the undo/redo of this operation
- // for use as labels in the UI.
- // Note: The labels describe the original user action, this may result in
- // the meaning of the redo label being reversed. For example, an
- // UndoOperation representing a deletion would have been created in order to
- // redo an addition by the user. In this case, the redo label string for the
- // UndoOperation of delete would be "Redo add".
- virtual int GetUndoLabelId() const = 0;
- virtual int GetRedoLabelId() const = 0;
- };
- #endif // COMPONENTS_UNDO_UNDO_OPERATION_H_
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