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diff --git a/sw/source/core/inc/ftnboss.hxx b/sw/source/core/inc/ftnboss.hxx
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+++ b/sw/source/core/inc/ftnboss.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_SW_SOURCE_CORE_INC_FTNBOSS_HXX
+#define INCLUDED_SW_SOURCE_CORE_INC_FTNBOSS_HXX
+
+#include "layfrm.hxx"
+
+class SwFootnoteBossFrame;
+class SwFootnoteContFrame;
+class SwFootnoteFrame;
+class SwTextFootnote;
+
+// Set max. footnote area.
+// Restoration of the old value in DTor. Implementation in ftnfrm.cxx
+class SwSaveFootnoteHeight
+{
+    SwFrameDeleteGuard aGuard;
+    SwFootnoteBossFrame *pBoss;
+    const SwTwips nOldHeight;
+    SwTwips nNewHeight;
+public:
+    SwSaveFootnoteHeight( SwFootnoteBossFrame *pBs, const SwTwips nDeadLine );
+    ~SwSaveFootnoteHeight();
+};
+
+enum class SwNeighbourAdjust {
+    OnlyAdjust, GrowShrink, GrowAdjust, AdjustGrow
+};
+
+typedef std::vector<SwFootnoteFrame*> SwFootnoteFrames;
+
+class SAL_DLLPUBLIC_RTTI SwFootnoteBossFrame: public SwLayoutFrame
+{
+    // for private footnote operations
+    friend class SwFrame;
+    friend class SwSaveFootnoteHeight;
+    friend class SwPageFrame; // for setting of MaxFootnoteHeight
+
+    // max. height of the footnote container on this page
+    SwTwips m_nMaxFootnoteHeight;
+
+    SwFootnoteContFrame *MakeFootnoteCont();
+    SwFootnoteFrame     *FindFirstFootnote();
+    SwNeighbourAdjust NeighbourhoodAdjustment_() const;
+
+    static void CollectFootnotes_(const SwContentFrame*, SwFootnoteFrame*,
+                                  SwFootnoteFrames&, const SwFootnoteBossFrame*);
+
+protected:
+    void          InsertFootnote( SwFootnoteFrame * );
+    static void   ResetFootnote( const SwFootnoteFrame *pAssumed );
+
+public:
+    SwFootnoteBossFrame( SwFrameFormat* pFormat, SwFrame* pSib )
+        : SwLayoutFrame( pFormat, pSib )
+        , m_nMaxFootnoteHeight(0)
+        {}
+
+                 SwLayoutFrame *FindBodyCont();
+    inline const SwLayoutFrame *FindBodyCont() const;
+    void SetMaxFootnoteHeight( const SwTwips nNewMax ) { m_nMaxFootnoteHeight = nNewMax; }
+
+    // footnote interface
+    void AppendFootnote( SwContentFrame *, SwTextFootnote * );
+    bool RemoveFootnote(const SwContentFrame *, const SwTextFootnote *, bool bPrep = true);
+    static       SwFootnoteFrame     *FindFootnote( const SwContentFrame *, const SwTextFootnote * );
+                 SwFootnoteContFrame *FindFootnoteCont();
+    inline const SwFootnoteContFrame *FindFootnoteCont() const;
+           const SwFootnoteFrame     *FindFirstFootnote( SwContentFrame const * ) const;
+                 SwFootnoteContFrame *FindNearestFootnoteCont( bool bDontLeave = false );
+
+    static void ChangeFootnoteRef( const SwContentFrame *pOld, const SwTextFootnote *,
+                       SwContentFrame *pNew );
+    void RearrangeFootnotes( const SwTwips nDeadLine, const bool bLock,
+                        const SwTextFootnote *pAttr = nullptr );
+
+    // Set DeadLine (in document coordinates) so that the text formatter can
+    // temporarily limit footnote height.
+    void    SetFootnoteDeadLine( const SwTwips nDeadLine );
+    SwTwips GetMaxFootnoteHeight() const { return m_nMaxFootnoteHeight; }
+
+    // returns value for remaining space until the body reaches minimal height
+    SwTwips GetVarSpace() const;
+
+    // methods needed for layouting
+    // The parameter <_bCollectOnlyPreviousFootnotes> controls if only footnotes
+    // that are positioned before the this footnote boss-frame have to be
+    // collected.
+    void    CollectFootnotes( const SwContentFrame* _pRef,
+                         SwFootnoteBossFrame*     _pOld,
+                         SwFootnoteFrames&        _rFootnoteArr,
+                         const bool    _bCollectOnlyPreviousFootnotes = false );
+    void    MoveFootnotes_( SwFootnoteFrames &rFootnoteArr, bool bCalc = false );
+    void    MoveFootnotes( const SwContentFrame *pSrc, SwContentFrame *pDest,
+                      SwTextFootnote const *pAttr );
+
+    // should AdjustNeighbourhood be called (or Grow/Shrink)?
+    SwNeighbourAdjust NeighbourhoodAdjustment() const
+        { return IsPageFrame() ? SwNeighbourAdjust::OnlyAdjust : NeighbourhoodAdjustment_(); }
+};
+
+inline const SwLayoutFrame *SwFootnoteBossFrame::FindBodyCont() const
+{
+    return const_cast<SwFootnoteBossFrame*>(this)->FindBodyCont();
+}
+
+inline const SwFootnoteContFrame *SwFootnoteBossFrame::FindFootnoteCont() const
+{
+    return const_cast<SwFootnoteBossFrame*>(this)->FindFootnoteCont();
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */