1 files changed, 613 insertions, 0 deletions

diff --git a/sw/source/core/undo/unsect.cxx b/sw/source/core/undo/unsect.cxx
new file mode 100644
index 0000000000..4e75aa9adb
--- /dev/null
+++ b/sw/source/core/undo/unsect.cxx
@@ -0,0 +1,613 @@
+/* -*- 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 .
+ */
+
+#include <memory>
+#include <UndoSection.hxx>
+
+#include <editeng/protitem.hxx>
+#include <osl/diagnose.h>
+#include <comphelper/scopeguard.hxx>
+#include <sfx2/linkmgr.hxx>
+#include <fmtcntnt.hxx>
+#include <doc.hxx>
+#include <IDocumentLinksAdministration.hxx>
+#include <IDocumentRedlineAccess.hxx>
+#include <IDocumentFieldsAccess.hxx>
+#include <IDocumentLayoutAccess.hxx>
+#include <IDocumentStylePoolAccess.hxx>
+#include <poolfmt.hxx>
+#include <docary.hxx>
+#include <swundo.hxx>
+#include <pam.hxx>
+#include <ndtxt.hxx>
+#include <UndoCore.hxx>
+#include <section.hxx>
+#include <rolbck.hxx>
+#include <redline.hxx>
+#include <doctxm.hxx>
+#include <ftnidx.hxx>
+#include <rootfrm.hxx>
+#include <editsh.hxx>
+/// OD 04.10.2002 #102894#
+/// class Calc needed for calculation of the hidden condition of a section.
+#include <calc.hxx>
+
+static std::optional<SfxItemSet> lcl_GetAttrSet( const SwSection& rSect )
+{
+    // save attributes of the format (columns, color, ...)
+    // Content and Protect items are not interesting since they are already
+    // stored in Section, thus delete them.
+    std::optional<SfxItemSet> oAttr;
+    if( rSect.GetFormat() )
+    {
+        sal_uInt16 nCnt = 1;
+        if( rSect.IsProtect() )
+            ++nCnt;
+
+        if( nCnt < rSect.GetFormat()->GetAttrSet().Count() )
+        {
+            oAttr.emplace( rSect.GetFormat()->GetAttrSet() );
+            oAttr->ClearItem( RES_PROTECT );
+            oAttr->ClearItem( RES_CNTNT );
+            if( !oAttr->Count() )
+            {
+                oAttr.reset();
+            }
+        }
+    }
+    return oAttr;
+}
+
+SwUndoInsSection::SwUndoInsSection(
+        SwPaM const& rPam, SwSectionData const& rNewData,
+        SfxItemSet const*const pSet,
+        std::tuple<SwTOXBase const*, sw::RedlineMode, sw::FieldmarkMode, sw::ParagraphBreakMode> const*const pTOXBase)
+    : SwUndo( SwUndoId::INSSECTION, &rPam.GetDoc() ), SwUndRng( rPam )
+    , m_pSectionData(new SwSectionData(rNewData))
+    , m_pAttrSet( (pSet && pSet->Count()) ? new SfxItemSet( *pSet ) : nullptr )
+    , m_nSectionNodePos(0)
+    , m_bSplitAtStart(false)
+    , m_bSplitAtEnd(false)
+    , m_bUpdateFootnote(false)
+{
+    if (pTOXBase)
+        m_xTOXBase.emplace(
+            std::make_unique<SwTOXBase>(*std::get<0>(*pTOXBase)),
+            std::get<1>(*pTOXBase),
+            std::get<2>(*pTOXBase),
+            std::get<3>(*pTOXBase));
+
+    SwDoc& rDoc = rPam.GetDoc();
+    if( rDoc.getIDocumentRedlineAccess().IsRedlineOn() )
+    {
+        m_pRedlData.reset(new SwRedlineData( RedlineType::Insert,
+                                        rDoc.getIDocumentRedlineAccess().GetRedlineAuthor() ));
+        SetRedlineFlags( rDoc.getIDocumentRedlineAccess().GetRedlineFlags() );
+    }
+    m_pRedlineSaveData.reset( new SwRedlineSaveDatas );
+    if( !FillSaveData( rPam, *m_pRedlineSaveData, false ))
+            m_pRedlineSaveData.reset();
+
+    if( rPam.HasMark() )
+        return;
+
+    const SwContentNode* pCNd = rPam.GetPoint()->GetNode().GetContentNode();
+    if( pCNd && pCNd->HasSwAttrSet() && (
+        !rPam.GetPoint()->GetContentIndex() ||
+        rPam.GetPoint()->GetContentIndex() == pCNd->Len() ))
+    {
+        SfxItemSet aBrkSet( rDoc.GetAttrPool(), aBreakSetRange );
+        aBrkSet.Put( *pCNd->GetpSwAttrSet() );
+        if( aBrkSet.Count() )
+        {
+            m_pHistory.reset( new SwHistory );
+            m_pHistory->CopyFormatAttr( aBrkSet, pCNd->GetIndex() );
+        }
+    }
+}
+
+SwUndoInsSection::~SwUndoInsSection()
+{
+}
+
+void SwUndoInsSection::UndoImpl(::sw::UndoRedoContext & rContext)
+{
+    SwDoc & rDoc = rContext.GetDoc();
+
+    RemoveIdxFromSection( rDoc, m_nSectionNodePos );
+
+    SwSectionNode *const pNd =
+        rDoc.GetNodes()[ m_nSectionNodePos ]->GetSectionNode();
+    OSL_ENSURE( pNd, "where is my SectionNode?" );
+
+    if( IDocumentRedlineAccess::IsRedlineOn( GetRedlineFlags() ))
+        rDoc.getIDocumentRedlineAccess().DeleteRedline( *pNd, true, RedlineType::Any );
+
+    // no selection?
+    SwNodeIndex aIdx( *pNd );
+    if( ( !m_nEndNode && COMPLETE_STRING == m_nEndContent ) ||
+        ( m_nSttNode == m_nEndNode && m_nSttContent == m_nEndContent ))
+        // delete simply all nodes
+        rDoc.GetNodes().Delete( aIdx, pNd->EndOfSectionIndex() -
+                                        aIdx.GetIndex() );
+    else
+        // just delete format, rest happens automatically
+        rDoc.DelSectionFormat( pNd->GetSection().GetFormat() );
+
+    // do we need to consolidate?
+    if (m_bSplitAtStart)
+    {
+        Join( rDoc, m_nSttNode );
+    }
+
+    if (m_bSplitAtEnd)
+    {
+        Join( rDoc, m_nEndNode );
+    }
+
+    if (m_pHistory)
+    {
+        m_pHistory->TmpRollback( &rDoc, 0, false );
+    }
+
+    if (m_bUpdateFootnote)
+    {
+        rDoc.GetFootnoteIdxs().UpdateFootnote( aIdx.GetNode() );
+    }
+
+    AddUndoRedoPaM(rContext);
+
+    if (m_pRedlineSaveData)
+        SetSaveData( rDoc, *m_pRedlineSaveData );
+}
+
+void SwUndoInsSection::RedoImpl(::sw::UndoRedoContext & rContext)
+{
+    SwDoc & rDoc = rContext.GetDoc();
+    SwPaM & rPam( AddUndoRedoPaM(rContext) );
+
+    const SwTOXBaseSection* pUpdateTOX = nullptr;
+    if (m_xTOXBase)
+    {
+        SwRootFrame const* pLayout(nullptr);
+        SwRootFrame * pLayoutToReset(nullptr);
+        sw::FieldmarkMode eFieldmarkMode{};
+        sw::ParagraphBreakMode eParagraphBreakMode{};
+        comphelper::ScopeGuard g([&]() {
+                if (pLayoutToReset)
+                {
+                    pLayoutToReset->SetHideRedlines(std::get<1>(*m_xTOXBase) == sw::RedlineMode::Shown);
+                    pLayoutToReset->SetFieldmarkMode(eFieldmarkMode, eParagraphBreakMode);
+                }
+            });
+        o3tl::sorted_vector<SwRootFrame *> layouts(rDoc.GetAllLayouts());
+        for (SwRootFrame const*const p : layouts)
+        {
+            if ((std::get<1>(*m_xTOXBase) == sw::RedlineMode::Hidden) == p->IsHideRedlines()
+                && std::get<2>(*m_xTOXBase) == p->GetFieldmarkMode()
+                && std::get<3>(*m_xTOXBase) == p->GetParagraphBreakMode())
+            {
+                pLayout = p;
+                break;
+            }
+        }
+        if (!pLayout)
+        {
+            assert(!layouts.empty()); // must have one layout
+            pLayoutToReset = *layouts.begin();
+            eFieldmarkMode = pLayoutToReset->GetFieldmarkMode();
+            eParagraphBreakMode = pLayoutToReset->GetParagraphBreakMode();
+            pLayoutToReset->SetHideRedlines(std::get<1>(*m_xTOXBase) == sw::RedlineMode::Hidden);
+            pLayoutToReset->SetFieldmarkMode(std::get<2>(*m_xTOXBase), std::get<3>(*m_xTOXBase));
+            pLayout = pLayoutToReset;
+        }
+        pUpdateTOX = rDoc.InsertTableOf( *rPam.GetPoint(),
+            // don't expand: will be done by SwUndoUpdateIndex::RedoImpl()
+            *std::get<0>(*m_xTOXBase), m_pAttrSet.get(), false, pLayout);
+    }
+    else
+    {
+        rDoc.InsertSwSection(rPam, *m_pSectionData, nullptr, m_pAttrSet.get());
+    }
+
+    if (m_pHistory)
+    {
+        m_pHistory->SetTmpEnd( m_pHistory->Count() );
+    }
+
+    SwSectionNode *const pSectNd =
+        rDoc.GetNodes()[ m_nSectionNodePos ]->GetSectionNode();
+    if (m_pRedlData &&
+        IDocumentRedlineAccess::IsRedlineOn( GetRedlineFlags()))
+    {
+        RedlineFlags eOld = rDoc.getIDocumentRedlineAccess().GetRedlineFlags();
+        rDoc.getIDocumentRedlineAccess().SetRedlineFlags_intern(eOld & ~RedlineFlags::Ignore);
+
+        SwPaM aPam( *pSectNd->EndOfSectionNode(), *pSectNd, SwNodeOffset(1) );
+        rDoc.getIDocumentRedlineAccess().AppendRedline( new SwRangeRedline( *m_pRedlData, aPam ), true);
+        rDoc.getIDocumentRedlineAccess().SetRedlineFlags_intern( eOld );
+    }
+    else if( !( RedlineFlags::Ignore & GetRedlineFlags() ) &&
+            !rDoc.getIDocumentRedlineAccess().GetRedlineTable().empty() )
+    {
+        SwPaM aPam( *pSectNd->EndOfSectionNode(), *pSectNd, SwNodeOffset(1) );
+        rDoc.getIDocumentRedlineAccess().SplitRedline( aPam );
+    }
+
+    if( pUpdateTOX )
+    {
+        // initiate formatting
+        if (SwEditShell* pESh = rDoc.GetEditShell())
+            pESh->CalcLayout();
+
+        // insert page numbers
+        const_cast<SwTOXBaseSection*>(pUpdateTOX)->UpdatePageNum();
+    }
+}
+
+void SwUndoInsSection::RepeatImpl(::sw::RepeatContext & rContext)
+{
+    SwDoc & rDoc = rContext.GetDoc();
+    if (m_xTOXBase)
+    {
+        rDoc.InsertTableOf(*rContext.GetRepeatPaM().GetPoint(),
+            *std::get<0>(*m_xTOXBase), m_pAttrSet.get(), true,
+            rDoc.getIDocumentLayoutAccess().GetCurrentLayout()); // TODO add shell to RepeatContext?
+    }
+    else
+    {
+        rDoc.InsertSwSection(rContext.GetRepeatPaM(),
+            *m_pSectionData, nullptr, m_pAttrSet.get());
+    }
+}
+
+void SwUndoInsSection::Join( SwDoc& rDoc, SwNodeOffset nNode )
+{
+    SwNodeIndex aIdx( rDoc.GetNodes(), nNode );
+    SwTextNode* pTextNd = aIdx.GetNode().GetTextNode();
+    OSL_ENSURE( pTextNd, "Where is my TextNode?" );
+
+    {
+        RemoveIdxRel(
+            nNode + 1,
+            SwPosition( aIdx, pTextNd, pTextNd->GetText().getLength() ) );
+    }
+    pTextNd->JoinNext();
+
+    if (m_pHistory)
+        pTextNd->RstTextAttr( 0, pTextNd->Len(), 0, nullptr, true );
+}
+
+void
+SwUndoInsSection::SaveSplitNode(SwTextNode *const pTextNd, bool const bAtStart)
+{
+    if( pTextNd->GetpSwpHints() )
+    {
+        if (!m_pHistory)
+        {
+            m_pHistory.reset( new SwHistory );
+        }
+        m_pHistory->CopyAttr( pTextNd->GetpSwpHints(), pTextNd->GetIndex(), 0,
+                            pTextNd->GetText().getLength(), false );
+    }
+
+    if (bAtStart)
+    {
+        m_bSplitAtStart = true;
+    }
+    else
+    {
+        m_bSplitAtEnd = true;
+    }
+}
+
+class SwUndoDelSection
+    : public SwUndo
+{
+private:
+    std::unique_ptr<SwSectionData> const m_pSectionData; /// section not TOX
+    std::unique_ptr<SwTOXBase> const m_pTOXBase; /// set iff section is TOX
+    std::optional<SfxItemSet> const m_oAttrSet;
+    std::shared_ptr< ::sfx2::MetadatableUndo > const m_pMetadataUndo;
+    SwNodeOffset const m_nStartNode;
+    SwNodeOffset const m_nEndNode;
+
+public:
+    SwUndoDelSection(
+        SwSectionFormat const&, SwSection const&, SwNodeIndex const*const);
+
+    virtual void UndoImpl( ::sw::UndoRedoContext & ) override;
+    virtual void RedoImpl( ::sw::UndoRedoContext & ) override;
+};
+
+std::unique_ptr<SwUndo> MakeUndoDelSection(SwSectionFormat const& rFormat)
+{
+    return std::make_unique<SwUndoDelSection>(rFormat, *rFormat.GetSection(),
+                rFormat.GetContent().GetContentIdx());
+}
+
+SwUndoDelSection::SwUndoDelSection(
+            SwSectionFormat const& rSectionFormat, SwSection const& rSection,
+            SwNodeIndex const*const pIndex)
+    : SwUndo( SwUndoId::DELSECTION, rSectionFormat.GetDoc() )
+    , m_pSectionData( new SwSectionData(rSection) )
+    , m_pTOXBase( dynamic_cast<const SwTOXBaseSection*>( &rSection) !=  nullptr
+            ? new SwTOXBase(static_cast<SwTOXBaseSection const&>(rSection))
+            : nullptr )
+    , m_oAttrSet( ::lcl_GetAttrSet(rSection) )
+    , m_pMetadataUndo( rSectionFormat.CreateUndo() )
+    , m_nStartNode( pIndex->GetIndex() )
+    , m_nEndNode( pIndex->GetNode().EndOfSectionIndex() )
+{
+}
+
+void SwUndoDelSection::UndoImpl(::sw::UndoRedoContext & rContext)
+{
+    SwDoc & rDoc = rContext.GetDoc();
+
+    if (m_pTOXBase)
+    {
+        // sw_redlinehide: this should work as-is; there will be another undo for the update
+        rDoc.InsertTableOf(m_nStartNode, m_nEndNode-2, *m_pTOXBase,
+                m_oAttrSet ? &*m_oAttrSet : nullptr);
+    }
+    else
+    {
+        SwNodeIndex aStt( rDoc.GetNodes(), m_nStartNode );
+        SwNodeIndex aEnd( rDoc.GetNodes(), m_nEndNode-2 );
+        SwSectionFormat* pFormat = rDoc.MakeSectionFormat();
+        if (m_oAttrSet)
+        {
+            pFormat->SetFormatAttr( *m_oAttrSet );
+        }
+
+        /// OD 04.10.2002 #102894#
+        /// remember inserted section node for further calculations
+        SwSectionNode* pInsertedSectNd = rDoc.GetNodes().InsertTextSection(
+                aStt.GetNode(), *pFormat, *m_pSectionData, nullptr, & aEnd.GetNode() );
+
+        if( SfxItemState::SET == pFormat->GetItemState( RES_FTN_AT_TXTEND ) ||
+            SfxItemState::SET == pFormat->GetItemState( RES_END_AT_TXTEND ))
+        {
+            rDoc.GetFootnoteIdxs().UpdateFootnote( aStt.GetNode() );
+        }
+
+        /// OD 04.10.2002 #102894#
+        /// consider that section is hidden by condition.
+        /// If section is hidden by condition,
+        /// recalculate condition and update hidden condition flag.
+        /// Recalculation is necessary, because fields, on which the hide
+        /// condition depends, can be changed - fields changes aren't undoable.
+        /// NOTE: setting hidden condition flag also creates/deletes corresponding
+        ///     frames, if the hidden condition flag changes.
+        SwSection& aInsertedSect = pInsertedSectNd->GetSection();
+        if ( aInsertedSect.IsHidden() &&
+             !aInsertedSect.GetCondition().isEmpty() )
+        {
+            SwCalc aCalc( rDoc );
+            rDoc.getIDocumentFieldsAccess().FieldsToCalc(aCalc, pInsertedSectNd->GetIndex(), SAL_MAX_INT32);
+            bool bRecalcCondHidden =
+                    aCalc.Calculate( aInsertedSect.GetCondition() ).GetBool();
+            aInsertedSect.SetCondHidden( bRecalcCondHidden );
+        }
+
+        pFormat->RestoreMetadata(m_pMetadataUndo);
+    }
+}
+
+void SwUndoDelSection::RedoImpl(::sw::UndoRedoContext & rContext)
+{
+    SwDoc & rDoc = rContext.GetDoc();
+
+    SwSectionNode *const pNd =
+        rDoc.GetNodes()[ m_nStartNode ]->GetSectionNode();
+    OSL_ENSURE( pNd, "Where is my SectionNode?" );
+    // just delete format, rest happens automatically
+    rDoc.DelSectionFormat( pNd->GetSection().GetFormat() );
+}
+
+namespace {
+
+class SwUndoUpdateSection
+    : public SwUndo
+{
+private:
+    std::unique_ptr<SwSectionData> m_pSectionData;
+    std::optional<SfxItemSet> m_oAttrSet;
+    SwNodeOffset const m_nStartNode;
+    bool const m_bOnlyAttrChanged;
+
+public:
+    SwUndoUpdateSection(
+        SwSection const&, SwNodeIndex const*const, bool const bOnlyAttr);
+
+    virtual void UndoImpl( ::sw::UndoRedoContext & ) override;
+    virtual void RedoImpl( ::sw::UndoRedoContext & ) override;
+};
+
+}
+
+std::unique_ptr<SwUndo>
+MakeUndoUpdateSection(SwSectionFormat const& rFormat, bool const bOnlyAttr)
+{
+    return std::make_unique<SwUndoUpdateSection>(*rFormat.GetSection(),
+                rFormat.GetContent().GetContentIdx(), bOnlyAttr);
+}
+
+SwUndoUpdateSection::SwUndoUpdateSection(
+        SwSection const& rSection, SwNodeIndex const*const pIndex,
+        bool const bOnlyAttr)
+    : SwUndo( SwUndoId::CHGSECTION, &pIndex->GetNode().GetDoc() )
+    , m_pSectionData( new SwSectionData(rSection) )
+    , m_oAttrSet( ::lcl_GetAttrSet(rSection) )
+    , m_nStartNode( pIndex->GetIndex() )
+    , m_bOnlyAttrChanged( bOnlyAttr )
+{
+}
+
+void SwUndoUpdateSection::UndoImpl(::sw::UndoRedoContext & rContext)
+{
+    SwDoc & rDoc = rContext.GetDoc();
+    SwSectionNode *const pSectNd =
+        rDoc.GetNodes()[ m_nStartNode ]->GetSectionNode();
+    OSL_ENSURE( pSectNd, "Where is my SectionNode?" );
+
+    SwSection& rNdSect = pSectNd->GetSection();
+    SwFormat* pFormat = rNdSect.GetFormat();
+
+    std::optional<SfxItemSet> oCur = ::lcl_GetAttrSet( rNdSect );
+    if (m_oAttrSet)
+    {
+        // The Content and Protect items must persist
+        m_oAttrSet->Put( pFormat->GetFormatAttr( RES_CNTNT ));
+        if( const SvxProtectItem* pItem = pFormat->GetItemIfSet( RES_PROTECT ))
+        {
+            m_oAttrSet->Put( *pItem );
+        }
+        pFormat->DelDiffs( *m_oAttrSet );
+        m_oAttrSet->ClearItem( RES_CNTNT );
+        pFormat->SetFormatAttr( *m_oAttrSet );
+    }
+    else
+    {
+        // than the old ones need to be deleted
+        pFormat->ResetFormatAttr( RES_FRMATR_BEGIN, RES_BREAK );
+        pFormat->ResetFormatAttr( RES_HEADER, RES_OPAQUE );
+        pFormat->ResetFormatAttr( RES_SURROUND, RES_FRMATR_END-1 );
+    }
+    if (oCur)
+        m_oAttrSet.emplace(std::move(*oCur));
+    else
+        m_oAttrSet.reset();
+
+    if (m_bOnlyAttrChanged)
+        return;
+
+    const bool bUpdate =
+           (!rNdSect.IsLinkType() && m_pSectionData->IsLinkType())
+        || (    !m_pSectionData->GetLinkFileName().isEmpty()
+            &&  (m_pSectionData->GetLinkFileName() !=
+                    rNdSect.GetLinkFileName()));
+
+    // swap stored section data with live section data
+    SwSectionData *const pOld( new SwSectionData(rNdSect) );
+    rNdSect.SetSectionData(*m_pSectionData);
+    m_pSectionData.reset(pOld);
+
+    if( bUpdate )
+        rNdSect.CreateLink( LinkCreateType::Update );
+    else if( SectionType::Content == rNdSect.GetType() && rNdSect.IsConnected() )
+    {
+        rNdSect.Disconnect();
+        rDoc.getIDocumentLinksAdministration().GetLinkManager().Remove( &rNdSect.GetBaseLink() );
+    }
+}
+
+void SwUndoUpdateSection::RedoImpl(::sw::UndoRedoContext & rContext)
+{
+    UndoImpl(rContext);
+}
+
+
+SwUndoUpdateIndex::SwUndoUpdateIndex(SwTOXBaseSection & rTOX)
+    : SwUndo(SwUndoId::INSSECTION, rTOX.GetFormat()->GetDoc())
+    , m_pSaveSectionOriginal(new SwUndoSaveSection)
+    , m_pSaveSectionUpdated(new SwUndoSaveSection)
+    , m_nStartIndex(rTOX.GetFormat()->GetSectionNode()->GetIndex() + 1)
+{
+    SwDoc & rDoc(*rTOX.GetFormat()->GetDoc());
+    assert(rDoc.GetNodes()[m_nStartIndex-1]->IsSectionNode());
+    assert(rDoc.GetNodes()[rDoc.GetNodes()[m_nStartIndex]->EndOfSectionIndex()-1]->IsTextNode()); // -1 for extra empty node
+    // note: title is optional
+    assert(rDoc.GetNodes()[m_nStartIndex]->IsTextNode()
+        || rDoc.GetNodes()[m_nStartIndex]->IsSectionNode());
+    SwNodeIndex const first(rDoc.GetNodes(), m_nStartIndex);
+    if (first.GetNode().IsSectionNode())
+    {
+        SwSectionFormat & rSectionFormat(*first.GetNode().GetSectionNode()->GetSection().GetFormat());
+        // note: DelSectionFormat will create & append SwUndoDelSection!
+        rDoc.DelSectionFormat(& rSectionFormat); // remove inner section nodes
+    }
+    assert(first.GetNode().IsTextNode()); // invariant: ToX section is *never* empty
+    SwNodeIndex const last(rDoc.GetNodes(), rDoc.GetNodes()[m_nStartIndex]->EndOfSectionIndex() - 2); // skip empty node
+    assert(last.GetNode().IsTextNode());
+    m_pSaveSectionOriginal->SaveSection(SwNodeRange(first, last), false);
+}
+
+SwUndoUpdateIndex::~SwUndoUpdateIndex() = default;
+
+void SwUndoUpdateIndex::TitleSectionInserted(SwSectionFormat & rFormat)
+{
+#ifndef NDEBUG
+    SwNodeIndex const tmp(rFormat.GetDoc()->GetNodes(), m_nStartIndex); // title inserted before empty node
+    assert(tmp.GetNode().IsSectionNode());
+    assert(tmp.GetNode().GetSectionNode()->GetSection().GetFormat() == &rFormat);
+#endif
+    m_pTitleSectionUpdated.reset(static_cast<SwUndoDelSection*>(MakeUndoDelSection(rFormat).release()));
+}
+
+void SwUndoUpdateIndex::UndoImpl(::sw::UndoRedoContext & rContext)
+{
+    SwDoc & rDoc(rContext.GetDoc());
+    if (m_pTitleSectionUpdated)
+    {
+        m_pTitleSectionUpdated->RedoImpl(rContext);
+    }
+    SwNodeIndex const first(rDoc.GetNodes(), m_nStartIndex);
+    assert(first.GetNode().IsTextNode()); // invariant: ToX section is *never* empty
+    SwNodeIndex const last(rDoc.GetNodes(), rDoc.GetNodes()[m_nStartIndex]->EndOfSectionIndex() - 1);
+    assert(last.GetNode().IsTextNode());
+    // dummy node so that SaveSection doesn't remove ToX section...
+    SwTextNode *const pDeletionPrevention = rDoc.GetNodes().MakeTextNode(
+        *rDoc.GetNodes()[m_nStartIndex]->EndOfSectionNode(),
+        rDoc.getIDocumentStylePoolAccess().GetTextCollFromPool(RES_POOLCOLL_TEXT));
+    m_pSaveSectionUpdated->SaveSection(SwNodeRange(first, last), false);
+    m_pSaveSectionOriginal->RestoreSection(&rDoc, first.GetNode(), true);
+    // delete before restoring nested undo, so its node indexes match
+    SwNodeIndex const del(*pDeletionPrevention);
+    SwDoc::CorrAbs(del, del, SwPosition(*rDoc.GetNodes()[m_nStartIndex]->EndOfSectionNode(), SwNodeOffset(0)), true);
+    rDoc.GetNodes().Delete(del);
+    // original title section will be restored by next Undo, see ctor!
+}
+
+void SwUndoUpdateIndex::RedoImpl(::sw::UndoRedoContext & rContext)
+{
+    SwDoc & rDoc(rContext.GetDoc());
+    // original title section was deleted by previous Undo, see ctor!
+    SwNodeIndex const first(rDoc.GetNodes(), m_nStartIndex);
+    assert(first.GetNode().IsTextNode()); // invariant: ToX section is *never* empty
+    SwNodeIndex const last(rDoc.GetNodes(), rDoc.GetNodes()[m_nStartIndex]->EndOfSectionIndex() - 1);
+    assert(last.GetNode().IsTextNode());
+    // dummy node so that SaveSection doesn't remove ToX section...
+    SwTextNode *const pDeletionPrevention = rDoc.GetNodes().MakeTextNode(
+        *rDoc.GetNodes()[m_nStartIndex]->EndOfSectionNode(),
+        rDoc.getIDocumentStylePoolAccess().GetTextCollFromPool(RES_POOLCOLL_TEXT));
+    m_pSaveSectionOriginal->SaveSection(SwNodeRange(first, last), false);
+    m_pSaveSectionUpdated->RestoreSection(&rDoc, first.GetNode(), true);
+    // delete before restoring nested undo, so its node indexes match
+    SwNodeIndex const del(*pDeletionPrevention);
+    SwDoc::CorrAbs(del, del, SwPosition(*rDoc.GetNodes()[m_nStartIndex]->EndOfSectionNode(), SwNodeOffset(0)), true);
+    rDoc.GetNodes().Delete(del);
+    if (m_pTitleSectionUpdated)
+    {
+        m_pTitleSectionUpdated->UndoImpl(rContext);
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */