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diff --git a/sw/source/core/text/widorp.hxx b/sw/source/core/text/widorp.hxx
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+++ b/sw/source/core/text/widorp.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 <swtypes.hxx>
+#include "itrtxt.hxx"
+
+class SwTextFrame;
+
+class SwTextFrameBreak
+{
+private:
+    SwTwips  m_nRstHeight;
+    SwTwips  m_nOrigin;
+protected:
+    SwTextFrame *m_pFrame;
+    bool     m_bBreak;
+    bool     m_bKeep;
+public:
+    SwTextFrameBreak( SwTextFrame *pFrame, const SwTwips nRst = 0  );
+    bool IsBreakNow( SwTextMargin &rLine );
+    bool IsKeepAlways() const { return m_bKeep; }
+
+    void SetKeep( const bool bNew ) { m_bKeep = bNew; }
+
+    bool IsInside( SwTextMargin const &rLine ) const;
+
+    // In order to be able to handle special cases with Footnote.
+    // SetRstHeight sets the rest height for SwTextFrameBreak. This is needed
+    // to call TruncLines() without IsBreakNow() returning another value.
+    // We assume that rLine is pointing to the last non-fitting line.
+
+    void SetRstHeight( const SwTextMargin &rLine );
+};
+
+class WidowsAndOrphans : public SwTextFrameBreak
+{
+private:
+    sal_uInt16   m_nWidLines, m_nOrphLines;
+
+public:
+    WidowsAndOrphans( SwTextFrame *pFrame, const SwTwips nRst = 0,
+        bool bCheckKeep = true );
+    bool FindWidows( SwTextFrame *pFrame, SwTextMargin &rLine );
+    sal_uInt16 GetOrphansLines() const
+    { return m_nOrphLines; }
+    void ClrOrphLines(){ m_nOrphLines = 0; }
+
+    bool FindBreak( SwTextFrame *pFrame, SwTextMargin &rLine, bool bHasToFit );
+    bool WouldFit( SwTextMargin &rLine, SwTwips &rMaxHeight, bool bTest, bool bMoveBwd );
+    // i#16128 - This method is named this way to avoid confusion with
+    // base class method <SwTextFrameBreak::IsBreakNow>, which isn't virtual.
+    bool IsBreakNowWidAndOrp( SwTextMargin &rLine )
+    {
+        bool isOnFirstLine = (rLine.GetLineNr() == 1 && !rLine.GetPrev());
+        if ( isOnFirstLine && rLine.GetCurr()->IsDummy()) {
+            return IsBreakNow( rLine );
+        }
+        if ( rLine.GetLineNr() > m_nOrphLines ) {
+            return IsBreakNow( rLine );
+        }
+        return false;
+    }
+};
+
+namespace sw {
+
+auto FindNonFlyPortion(SwLineLayout const& rLine) -> bool;
+
+} // namespace sw
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */