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diff --git a/sw/source/core/inc/unoflatpara.hxx b/sw/source/core/inc/unoflatpara.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_UNOFLATPARA_HXX
+#define INCLUDED_SW_SOURCE_CORE_INC_UNOFLATPARA_HXX
+
+#include <cppuhelper/implbase.hxx>
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <com/sun/star/text/XFlatParagraph.hpp>
+#include <com/sun/star/text/XFlatParagraphIterator.hpp>
+#include <svl/listener.hxx>
+#include "unotextmarkup.hxx"
+
+#include <set>
+
+namespace com::sun::star::container { class XStringKeyMap; }
+namespace com::sun::star::text { class XTextRange; }
+class SwTextNode;
+class SwDoc;
+class ModelToViewHelper;
+
+typedef ::cppu::ImplInheritanceHelper
+<   SwXTextMarkup
+,   css::beans::XPropertySet
+,   css::text::XFlatParagraph
+,   css::lang::XUnoTunnel
+> SwXFlatParagraph_Base;
+
+class SwXFlatParagraph
+    :   public SwXFlatParagraph_Base
+{
+public:
+    SwXFlatParagraph( SwTextNode& rTextNode, const OUString& aExpandText, const ModelToViewHelper& rConversionMap );
+    virtual ~SwXFlatParagraph() override;
+
+    // XPropertySet
+    virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL
+        getPropertySetInfo() override;
+    virtual void SAL_CALL setPropertyValue(
+            const OUString& rPropertyName,
+            const css::uno::Any& rValue) override;
+    virtual css::uno::Any SAL_CALL getPropertyValue(
+            const OUString& rPropertyName) override;
+    virtual void SAL_CALL addPropertyChangeListener(
+            const OUString& rPropertyName,
+            const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener) override;
+    virtual void SAL_CALL removePropertyChangeListener(
+            const OUString& rPropertyName,
+            const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener) override;
+    virtual void SAL_CALL addVetoableChangeListener(
+            const OUString& rPropertyName,
+            const css::uno::Reference< css::beans::XVetoableChangeListener >& xListener) override;
+    virtual void SAL_CALL removeVetoableChangeListener(
+            const OUString& rPropertyName,
+            const css::uno::Reference< css::beans::XVetoableChangeListener >& xListener) override;
+
+    // text::XTextMarkup:
+    virtual css::uno::Reference< css::container::XStringKeyMap > SAL_CALL getMarkupInfoContainer() override;
+
+    virtual void SAL_CALL commitStringMarkup(::sal_Int32 nType, const OUString & aIdentifier, ::sal_Int32 nStart, ::sal_Int32 nLength,
+                                   const css::uno::Reference< css::container::XStringKeyMap > & xMarkupInfoContainer) override;
+
+    virtual void SAL_CALL commitTextRangeMarkup(::sal_Int32 nType, const OUString & aIdentifier, const css::uno::Reference< css::text::XTextRange> & xRange,
+                                                const css::uno::Reference< css::container::XStringKeyMap > & xMarkupInfoContainer) override;
+
+    // text::XFlatParagraph:
+    virtual OUString SAL_CALL getText() override;
+    virtual sal_Bool SAL_CALL isModified() override;
+    virtual void SAL_CALL setChecked(::sal_Int32 nType, sal_Bool bVal) override;
+    virtual sal_Bool SAL_CALL isChecked(::sal_Int32 nType) override;
+    virtual css::lang::Locale SAL_CALL getLanguageOfText(::sal_Int32 nPos, ::sal_Int32 nLen) override;
+    virtual css::lang::Locale SAL_CALL getPrimaryLanguageOfText(::sal_Int32 nPos, ::sal_Int32 nLen) override;
+    virtual void SAL_CALL changeText(::sal_Int32 nPos, ::sal_Int32 nLen, const OUString & aNewText, const css::uno::Sequence< css::beans::PropertyValue > & aAttributes) override;
+    virtual void SAL_CALL changeAttributes(::sal_Int32 nPos, ::sal_Int32 nLen, const css::uno::Sequence< css::beans::PropertyValue > & aAttributes) override;
+    virtual css::uno::Sequence< ::sal_Int32 > SAL_CALL getLanguagePortions() override;
+
+    using SwXTextMarkup::GetTextNode;
+
+    static const css::uno::Sequence< sal_Int8 >& getUnoTunnelId();
+
+    // XUnoTunnel
+    virtual sal_Int64 SAL_CALL getSomething(const css::uno::Sequence< sal_Int8 >& rId) override;
+
+private:
+    SwXFlatParagraph( const SwXFlatParagraph & ) = delete;
+    SwXFlatParagraph & operator = ( const SwXFlatParagraph & ) = delete;
+
+    OUString maExpandText;
+};
+
+class SwXFlatParagraphIterator:
+    public ::cppu::WeakImplHelper
+    <
+        css::text::XFlatParagraphIterator
+    >,
+    public SvtListener
+{
+public:
+    SwXFlatParagraphIterator( SwDoc& rDoc, sal_Int32 nType, bool bAutomatic );
+    virtual ~SwXFlatParagraphIterator() override;
+
+    // text::XFlatParagraphIterator:
+    virtual css::uno::Reference< css::text::XFlatParagraph > SAL_CALL getFirstPara() override;
+    virtual css::uno::Reference< css::text::XFlatParagraph > SAL_CALL getNextPara() override;
+    virtual css::uno::Reference< css::text::XFlatParagraph > SAL_CALL getLastPara() override;
+    virtual css::uno::Reference< css::text::XFlatParagraph > SAL_CALL getParaBefore(const css::uno::Reference< css::text::XFlatParagraph > & xPara) override;
+    virtual css::uno::Reference< css::text::XFlatParagraph > SAL_CALL getParaAfter(const css::uno::Reference< css::text::XFlatParagraph > & xPara) override;
+
+    virtual void Notify( const SfxHint& ) override;
+
+private:
+    SwXFlatParagraphIterator( const SwXFlatParagraphIterator & ) = delete;
+    SwXFlatParagraphIterator & operator =(const SwXFlatParagraphIterator & ) = delete;
+
+    // container to hold the 'hard' references as long as necessary and valid
+    std::set< css::uno::Reference< css::text::XFlatParagraph > >    m_aFlatParaList;
+
+    SwDoc* mpDoc;
+    const sal_Int32 mnType;
+    const bool mbAutomatic;
+
+    sal_uLong mnCurrentNode;    // used for non-automatic mode
+    sal_uLong mnEndNode;        // used for non-automatic mode
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */