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diff --git a/chart2/source/controller/main/UndoActions.hxx b/chart2/source/controller/main/UndoActions.hxx
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+++ b/chart2/source/controller/main/UndoActions.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 .
+ */
+#pragma once
+
+#include <com/sun/star/document/XUndoAction.hpp>
+
+#include <rtl/ref.hxx>
+#include <rtl/ustring.hxx>
+#include <comphelper/compbase.hxx>
+
+#include <memory>
+
+namespace com::sun::star::frame { class XModel; }
+
+class SdrUndoAction;
+
+namespace chart
+{
+class ChartModel;
+class ChartModelClone;
+
+namespace impl
+{
+
+typedef comphelper::WeakComponentImplHelper< css::document::XUndoAction > UndoElement_TBase;
+
+class UndoElement final : public UndoElement_TBase
+{
+public:
+    /** creates a new undo action
+
+        @param i_actionString
+            is the title of the Undo action
+        @param i_documentModel
+            is the actual document model which the undo actions operates on
+        @param i_modelClone
+            is the cloned model from before the changes, which the Undo action represents, have been applied.
+            Upon <member>invoking</member>, the clone model is applied to the document model.
+    */
+    UndoElement( const OUString & i_actionString,
+                 const rtl::Reference<::chart::ChartModel>& i_documentModel,
+                 const std::shared_ptr< ChartModelClone >& i_modelClone
+               );
+    virtual ~UndoElement() override;
+
+    UndoElement(const UndoElement&) = delete;
+    const UndoElement& operator=(const UndoElement&) = delete;
+
+    // XUndoAction
+    virtual OUString SAL_CALL getTitle() override;
+    virtual void SAL_CALL undo(  ) override;
+    virtual void SAL_CALL redo(  ) override;
+
+    // WeakComponentImplHelper
+    virtual void disposing(std::unique_lock<std::mutex>&) override;
+
+private:
+    void    impl_toggleModelState();
+
+private:
+    OUString                                      m_sActionString;
+    rtl::Reference<::chart::ChartModel>           m_xDocumentModel;
+    std::shared_ptr< ChartModelClone >            m_pModelClone;
+};
+
+typedef comphelper::WeakComponentImplHelper< css::document::XUndoAction > ShapeUndoElement_TBase;
+class ShapeUndoElement final : public ShapeUndoElement_TBase
+{
+public:
+    explicit ShapeUndoElement( std::unique_ptr<SdrUndoAction> xSdrUndoAction );
+    virtual ~ShapeUndoElement() override;
+
+    // XUndoAction
+    virtual OUString SAL_CALL getTitle() override;
+    virtual void SAL_CALL undo(  ) override;
+    virtual void SAL_CALL redo(  ) override;
+
+private:
+    std::unique_ptr<SdrUndoAction> m_xAction;
+};
+
+} // namespace impl
+} //  namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */