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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <svx/sdrundomanager.hxx>
+
+namespace sd
+{
+
+class UndoManager final : public SdrUndoManager
+{
+public:
+ UndoManager();
+
+ virtual void EnterListAction(const OUString &rComment, const OUString& rRepeatComment, sal_uInt16 nId, ViewShellId nViewShellId) override;
+
+ virtual void AddUndoAction( std::unique_ptr<SfxUndoAction> pAction, bool bTryMerg=false ) override;
+
+ /** Set or reset the undo manager linked with the called undo manager.
+ */
+ void SetLinkedUndoManager (SfxUndoManager* pLinkedUndoManager);
+
+private:
+ using SdrUndoManager::Undo;
+ using SdrUndoManager::Redo;
+
+ /** Used when the outline view is visible as a last resort to
+ synchronize the undo managers.
+ */
+ SfxUndoManager* mpLinkedUndoManager;
+
+ /** Call ClearRedo() at the linked undo manager, when present.
+
+ It should not be necessary to call ClearRedo() explicitly, but the
+ synchronization between the under managers of the document and the
+ outline view seems to have a bug. Therefore this method is called
+ whenever a new undo action is added.
+ */
+ void ClearLinkedRedoActions();
+};
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */