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diff --git a/reportdesign/inc/UndoEnv.hxx b/reportdesign/inc/UndoEnv.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_REPORTDESIGN_INC_UNDOENV_HXX
+#define INCLUDED_REPORTDESIGN_INC_UNDOENV_HXX
+
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <com/sun/star/beans/PropertyChangeEvent.hpp>
+#include <com/sun/star/container/XContainerListener.hpp>
+#include <com/sun/star/container/XIndexAccess.hpp>
+#include <com/sun/star/util/XModifyListener.hpp>
+#include <com/sun/star/report/XSection.hpp>
+
+#include <memory>
+#include <cppuhelper/implbase.hxx>
+#include <svl/lstner.hxx>
+#include "dllapi.h"
+#include "RptPage.hxx"
+
+namespace rptui
+{
+    class OXUndoEnvironmentImpl;
+
+
+    class REPORTDESIGN_DLLPUBLIC OXUndoEnvironment final
+        : public ::cppu::WeakImplHelper<   css::beans::XPropertyChangeListener
+                                        ,   css::container::XContainerListener
+                                        ,   css::util::XModifyListener
+                                        >
+        , public SfxListener
+    {
+        const ::std::unique_ptr<OXUndoEnvironmentImpl> m_pImpl;
+
+        OXUndoEnvironment(const OXUndoEnvironment&) = delete;
+        OXUndoEnvironment& operator=(const OXUndoEnvironment&) = delete;
+
+        virtual ~OXUndoEnvironment() override;
+
+        void SetUndoMode(bool _bUndo);
+
+    public:
+        OXUndoEnvironment(OReportModel& _rModel);
+
+        /**
+           Create an object ob OUndoEnvLock locks the undo possibility
+           As long as in the OUndoEnvLock scope, no undo is possible for manipulated object.
+         */
+        class OUndoEnvLock
+        {
+            OXUndoEnvironment& m_rUndoEnv;
+        public:
+            OUndoEnvLock(OXUndoEnvironment& _rUndoEnv): m_rUndoEnv(_rUndoEnv){m_rUndoEnv.Lock();}
+            ~OUndoEnvLock(){ m_rUndoEnv.UnLock(); }
+        };
+
+        /**
+           This is near the same as OUndoEnvLock but it is also possible to ask for the current mode.
+           UndoMode will set if SID_UNDO is called in execute()
+         */
+        class OUndoMode
+        {
+            OXUndoEnvironment& m_rUndoEnv;
+        public:
+            OUndoMode(OXUndoEnvironment& _rUndoEnv)
+                :m_rUndoEnv(_rUndoEnv)
+            {
+                m_rUndoEnv.Lock();
+                m_rUndoEnv.SetUndoMode(true);
+            }
+            ~OUndoMode()
+            {
+                m_rUndoEnv.SetUndoMode(false);
+                m_rUndoEnv.UnLock();
+            }
+        };
+
+        void Lock();
+        void UnLock();
+        bool IsLocked() const;
+
+        // returns sal_True is we are in UNDO
+        bool IsUndoMode() const;
+
+        // access control
+        struct Accessor { friend class OReportModel; private: Accessor() { } };
+        void Clear(const Accessor& _r);
+
+        void AddElement(const css::uno::Reference< css::uno::XInterface>& Element);
+        void RemoveElement(const css::uno::Reference< css::uno::XInterface>& Element);
+
+        void AddSection( const css::uno::Reference< css::report::XSection>& _xSection);
+        void RemoveSection( const css::uno::Reference< css::report::XSection>& _xSection );
+        /** removes the section from the page out of the undo env
+        *
+        * \param _pPage
+        */
+        void RemoveSection(OReportPage const * _pPage);
+
+    private:
+        // XEventListener
+        virtual void SAL_CALL disposing(const css::lang::EventObject& Source) override;
+
+        // XPropertyChangeListener
+        virtual void SAL_CALL propertyChange(const css::beans::PropertyChangeEvent& evt) override;
+
+        // XContainerListener
+        virtual void SAL_CALL elementInserted(const css::container::ContainerEvent& rEvent) override;
+        virtual void SAL_CALL elementReplaced(const css::container::ContainerEvent& rEvent) override;
+        virtual void SAL_CALL elementRemoved(const css::container::ContainerEvent& rEvent) override;
+
+        // XModifyListener
+        virtual void SAL_CALL modified( const css::lang::EventObject& aEvent ) override;
+
+        void ModeChanged();
+
+        virtual void Notify( SfxBroadcaster& rBC, const SfxHint& rHint ) override;
+
+    private:
+        void    implSetModified();
+
+        void    switchListening( const css::uno::Reference< css::container::XIndexAccess >& _rxContainer, bool _bStartListening );
+        void    switchListening( const css::uno::Reference< css::uno::XInterface >& _rxObject, bool _bStartListening );
+
+        ::std::vector< css::uno::Reference< css::container::XChild> >::const_iterator
+            getSection(const css::uno::Reference< css::container::XChild>& _xContainer) const;
+    };
+
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */