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diff --git a/editeng/source/outliner/outlundo.hxx b/editeng/source/outliner/outlundo.hxx
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+++ b/editeng/source/outliner/outlundo.hxx
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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 .
+ */
+
+#ifndef INCLUDED_EDITENG_SOURCE_OUTLINER_OUTLUNDO_HXX
+#define INCLUDED_EDITENG_SOURCE_OUTLINER_OUTLUNDO_HXX
+
+#include <editeng/outliner.hxx>
+#include <editeng/editund2.hxx>
+
+class OutlinerUndoBase : public EditUndo
+{
+private:
+    Outliner*   mpOutliner;
+
+public:
+                OutlinerUndoBase( sal_uInt16 nId, Outliner* pOutliner );
+
+    Outliner*   GetOutliner() const { return mpOutliner; }
+};
+
+class OutlinerUndoChangeParaFlags : public OutlinerUndoBase
+{
+private:
+    sal_Int32       mnPara;
+    ParaFlag        mnOldFlags;
+    ParaFlag        mnNewFlags;
+
+    void ImplChangeFlags( ParaFlag nFlags );
+
+public:
+    OutlinerUndoChangeParaFlags( Outliner* pOutliner, sal_Int32 nPara, ParaFlag nOldFlags, ParaFlag nNewFlags );
+
+    virtual void    Undo() override;
+    virtual void    Redo() override;
+};
+
+class OutlinerUndoChangeParaNumberingRestart : public OutlinerUndoBase
+{
+private:
+    sal_Int32       mnPara;
+
+    struct ParaRestartData
+    {
+        sal_Int16       mnNumberingStartValue;
+        bool        mbParaIsNumberingRestart;
+    };
+
+    ParaRestartData maUndoData;
+    ParaRestartData maRedoData;
+
+    void ImplApplyData( const ParaRestartData& rData );
+public:
+    OutlinerUndoChangeParaNumberingRestart( Outliner* pOutliner, sal_Int32 nPara,
+        sal_Int16 nOldNumberingStartValue, sal_Int16 mnNewNumberingStartValue,
+        bool  bOldbParaIsNumberingRestart, bool bNewParaIsNumberingRestart );
+
+    virtual void    Undo() override;
+    virtual void    Redo() override;
+};
+
+class OutlinerUndoChangeDepth : public OutlinerUndoBase
+{
+private:
+    sal_Int32       mnPara;
+    sal_Int16       mnOldDepth;
+    sal_Int16       mnNewDepth;
+
+public:
+                    OutlinerUndoChangeDepth( Outliner* pOutliner, sal_Int32 nPara, sal_Int16 nOldDepth, sal_Int16 nNewDepth );
+
+    virtual void    Undo() override;
+    virtual void    Redo() override;
+};
+
+// Help-Undo: If it does not exist an OutlinerUndoAction for a certain action
+// because this is handled by the EditEngine, but for example the bullet has
+// to be recalculated.
+class OutlinerUndoCheckPara : public OutlinerUndoBase
+{
+private:
+    sal_Int32       mnPara;
+
+public:
+                    OutlinerUndoCheckPara( Outliner* pOutliner, sal_Int32 nPara );
+
+    virtual void    Undo() override;
+    virtual void    Redo() override;
+};
+
+class OLUndoExpand : public EditUndo
+{
+    void Restore( bool bUndo );
+public:
+    OLUndoExpand( Outliner* pOut, sal_uInt16 nId );
+    virtual ~OLUndoExpand() override;
+    virtual void Undo() override;
+    virtual void Redo() override;
+
+    Outliner* pOutliner;
+    sal_Int32 nCount;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */