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diff --git a/sw/inc/splargs.hxx b/sw/inc/splargs.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_INC_SPLARGS_HXX
+#define INCLUDED_SW_INC_SPLARGS_HXX
+
+#include <i18nlangtag/lang.h>
+#include <tools/gen.hxx>
+
+#include <com/sun/star/linguistic2/XSpellAlternatives.hpp>
+#include <com/sun/star/linguistic2/XSpellChecker1.hpp>
+
+#include <functional>
+#include <utility>
+
+struct SwPosition;
+class SwTextFrame;
+class SwTextNode;
+class SwContentIndex;
+namespace vcl { class Font; }
+namespace com::sun::star::linguistic2 { class XHyphenatedWord; }
+
+struct SwArgsBase     // used for text conversion (Hangul/Hanja, ...)
+{
+    SwPosition *pStartPos; // these both point to SwTextNode
+    SwPosition *pEndPos;
+
+    SwArgsBase(SwPosition& rStart, SwPosition& rEnd )
+        : pStartPos( &rStart ), pEndPos( &rEnd )
+        {}
+
+    void SetStart(SwPosition& rStart )
+    {
+        pStartPos = &rStart;
+    }
+
+    void SetEnd( SwPosition& rEnd  )
+    {
+        pEndPos = &rEnd ;
+    }
+};
+
+// used for text conversion (Hangul/Hanja, Simplified/Traditional Chinese, ...)
+struct SwConversionArgs : SwArgsBase
+{
+    OUString   aConvText;          // convertible text found
+    LanguageType    nConvSrcLang;       // (source) language to look for
+    LanguageType    nConvTextLang;      // language of aConvText (if the latter one was found)
+
+    // used for chinese translation
+    LanguageType    nConvTargetLang;    // target language of text to be changed
+    const vcl::Font *pTargetFont;        // target font of text to be changed
+    // explicitly enables or disables application of the above two
+    bool            bAllowImplicitChangesForNotConvertibleText;
+
+    SwConversionArgs( LanguageType nLang,
+            SwPosition& rStart,
+            SwPosition& rEnd )
+        : SwArgsBase( rStart, rEnd ),
+          nConvSrcLang( nLang ),
+          nConvTextLang( LANGUAGE_NONE ),
+          nConvTargetLang( LANGUAGE_NONE ),
+          pTargetFont( nullptr ),
+          bAllowImplicitChangesForNotConvertibleText( false )
+        {}
+};
+
+struct SwSpellArgs : SwArgsBase
+{
+    css::uno::Reference< css::linguistic2::XSpellChecker1 >     xSpeller;
+
+    css::uno::Reference< css::linguistic2::XSpellAlternatives > xSpellAlt;
+
+    bool bIsGrammarCheck;
+
+    SwSpellArgs(css::uno::Reference< css::linguistic2::XSpellChecker1 > xSplChk,
+            SwPosition& rStart,
+            SwPosition& rEnd,
+            bool bGrammar )
+        :   SwArgsBase( rStart, rEnd ),
+            xSpeller(std::move( xSplChk )),
+            bIsGrammarCheck( bGrammar )
+        {}
+};
+
+// Parameter-class for Hyphenate.
+// docedt.cxx:  SwDoc::Hyphenate()
+// txtedt.cxx:  SwTextNode::Hyphenate()
+// txthyph.cxx: SwTextFrame::Hyphenate()
+
+class SwInterHyphInfo
+{
+    /// output: hyphenated word
+    css::uno::Reference<css::linguistic2::XHyphenatedWord> m_xHyphWord;
+    /// input: cursor point to locate the frame
+    const Point m_aCursorPos;
+public:
+    /// input: requested range to hyphenate
+    sal_Int32 m_nStart;
+    sal_Int32 m_nEnd;
+    /// output: found word
+    sal_Int32 m_nWordStart;
+    sal_Int32 m_nWordLen;
+
+    SwInterHyphInfo( const Point &rCursorPos )
+        : m_aCursorPos(rCursorPos)
+        , m_nStart(0)
+        , m_nEnd(SAL_MAX_INT32)
+        , m_nWordStart(0), m_nWordLen(0)
+    {
+    }
+    const Point *GetCursorPos() const
+    {
+        return m_aCursorPos.X() || m_aCursorPos.Y() ? &m_aCursorPos : nullptr;
+    }
+    void SetHyphWord(const css::uno::Reference< css::linguistic2::XHyphenatedWord >  &rxHW)
+    {
+        m_xHyphWord = rxHW;
+    }
+    const css::uno::Reference< css::linguistic2::XHyphenatedWord >& GetHyphWord() const
+    {
+        return m_xHyphWord;
+    }
+};
+
+
+namespace sw {
+
+typedef std::function<SwTextFrame*()> Creator;
+
+SwTextFrame *
+SwHyphIterCacheLastTextFrame(SwTextNode const *, const Creator& rCreator);
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */