Quelle  txtfrm.cxx   Sprache: C

/* -*- 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 <config_wasm_strip.h>

#include <hintids.hxx>
#include <hints.hxx>
#include <svl/ctloptions.hxx>
#include <editeng/lspcitem.hxx>
#include <editeng/lrspitem.hxx>
#include <editeng/brushitem.hxx>
#include <editeng/charhiddenitem.hxx>
#include <editeng/pgrditem.hxx>
#include <comphelper/configuration.hxx>
#include <swmodule.hxx>
#include <SwSmartTagMgr.hxx>
#include <doc.hxx>
#include <IDocumentSettingAccess.hxx>
#include <IDocumentDeviceAccess.hxx>
#include <IDocumentFieldsAccess.hxx>
#include <rootfrm.hxx>
#include <pagefrm.hxx>
#include <viewsh.hxx>
#include <pam.hxx>
#include <ndtxt.hxx>
#include <paratr.hxx>
#include <viewopt.hxx>
#include <flyfrm.hxx>
#include <tabfrm.hxx>
#include <frmatr.hxx>
#include <frmtool.hxx>
#include <tgrditem.hxx>
#include <dbg_lay.hxx>
#include <fmtfld.hxx>
#include <fmtftn.hxx>
#include <txtfld.hxx>
#include <txtftn.hxx>
#include <ftninfo.hxx>
#include <fmtline.hxx>
#include <txtfrm.hxx>
#include <notxtfrm.hxx>
#include <sectfrm.hxx>
#include "itrform2.hxx"
#include "widorp.hxx"
#include "txtcache.hxx"
#include <fntcache.hxx>
#include <SwGrammarMarkUp.hxx>
#include <lineinfo.hxx>
#include <SwPortionHandler.hxx>
#include <dcontact.hxx>
#include <sortedobjs.hxx>
#include <txtflcnt.hxx>
#include <fmtflcnt.hxx>
#include <fmtcntnt.hxx>
#include <numrule.hxx>
#include <GrammarContact.hxx>
#include <calbck.hxx>
#include <ftnidx.hxx>
#include <ftnfrm.hxx>

#include <wrtsh.hxx>
#include <view.hxx>
#include <edtwin.hxx>
#include <FrameControlsManager.hxx>

namespace sw {

    MergedAttrIterBase::MergedAttrIterBase(SwTextFrame const& rFrame)
        : m_pMerged(rFrame.GetMergedPara())
        , m_pNode(m_pMerged ? nullptr : rFrame.GetTextNodeFirst())
        , m_CurrentExtent(0)
        , m_CurrentHint(0)
    {
    }

    SwTextAttr const* MergedAttrIter::NextAttr(SwTextNode const** ppNode)
    {
        if (m_pMerged)
        {
            while (m_CurrentExtent < m_pMerged->extents.size())
            {
                sw::Extent const& rExtent(m_pMerged->extents[m_CurrentExtent]);
                if (SwpHints const*const pHints = rExtent.pNode->GetpSwpHints())
                {
                    while (m_CurrentHint < pHints->Count())
                    {
                        SwTextAttr *const pHint(pHints->Get(m_CurrentHint));
                        if (rExtent.nEnd < pHint->GetStart()
                                // <= if it has no end or isn't empty
                            || (rExtent.nEnd == pHint->GetStart()
                                && (!pHint->GetEnd()
                                    || *pHint->GetEnd() != pHint->GetStart())))
                        {
                            break;
                        }
                        ++m_CurrentHint;
                        if (rExtent.nStart <= pHint->GetStart())
                        {
                            if (ppNode)
                            {
                                *ppNode = rExtent.pNode;
                            }
                            return pHint;
                        }
                    }
                }
                ++m_CurrentExtent;
                if (m_CurrentExtent < m_pMerged->extents.size() &&
                    rExtent.pNode != m_pMerged->extents[m_CurrentExtent].pNode)
                {
                    m_CurrentHint = 0; // reset
                }
            }
            return nullptr;
        }
        else
        {
            SwpHints const*const pHints(m_pNode->GetpSwpHints());
            if (pHints)
            {
                if (m_CurrentHint < pHints->Count())
                {
                    SwTextAttr const*const pHint(pHints->Get(m_CurrentHint));
                    ++m_CurrentHint;
                    if (ppNode)
                    {
                        *ppNode = m_pNode;
                    }
                    return pHint;
                }
            }
            return nullptr;
        }
    }

    MergedAttrIterByEnd::MergedAttrIterByEnd(SwTextFrame const& rFrame)
        : m_pNode(rFrame.GetMergedPara() ? nullptr : rFrame.GetTextNodeFirst())
        , m_CurrentHint(0)
    {
        if (!m_pNode)
        {
            MergedAttrIterReverse iter(rFrame);
            SwTextNode const* pNode(nullptr);
            while (SwTextAttr const* pHint = iter.PrevAttr(&pNode))
            {
                m_Hints.emplace_back(pNode, pHint);
            }
        }
    }

    SwTextAttr const* MergedAttrIterByEnd::NextAttr(SwTextNode const*& rpNode)
    {
        if (m_pNode)
        {
            SwpHints const*const pHints(m_pNode->GetpSwpHints());
            if (pHints)
            {
                if (m_CurrentHint < pHints->Count())
                {
                    SwTextAttr const*const pHint(
                            pHints->GetSortedByEnd(m_CurrentHint));
                    ++m_CurrentHint;
                    rpNode = m_pNode;
                    return pHint;
                }
            }
            return nullptr;
        }
        else
        {
            if (m_CurrentHint < m_Hints.size())
            {
                auto const ret = m_Hints[m_Hints.size() - m_CurrentHint - 1];
                ++m_CurrentHint;
                rpNode = ret.first;
                return ret.second;
            }
            return nullptr;
        }
    }

    void MergedAttrIterByEnd::PrevAttr()
    {
        assert(0 < m_CurrentHint); // should only rewind as far as 0
        --m_CurrentHint;
    }

    MergedAttrIterReverse::MergedAttrIterReverse(SwTextFrame const& rFrame)
        : MergedAttrIterBase(rFrame)
    {
        if (m_pMerged)
        {
            m_CurrentExtent = m_pMerged->extents.size();
            SwpHints const*const pHints(0 < m_CurrentExtent
                ? m_pMerged->extents[m_CurrentExtent-1].pNode->GetpSwpHints()
                : nullptr);
            if (pHints)
            {
                pHints->SortIfNeedBe();
                m_CurrentHint = pHints->Count();
            }
        }
        else
        {
            if (SwpHints const*const pHints = m_pNode->GetpSwpHints())
            {
                pHints->SortIfNeedBe();
                m_CurrentHint = pHints->Count();
            }
        }
    }

    SwTextAttr const* MergedAttrIterReverse::PrevAttr(SwTextNode const** ppNode)
    {
        if (m_pMerged)
        {
            while (0 < m_CurrentExtent)
            {
                sw::Extent const& rExtent(m_pMerged->extents[m_CurrentExtent-1]);
                if (SwpHints const*const pHints = rExtent.pNode->GetpSwpHints())
                {
                    while (0 < m_CurrentHint)
                    {
                        SwTextAttr *const pHint(
                                pHints->GetSortedByEnd(m_CurrentHint - 1));
                        if (pHint->GetAnyEnd() < rExtent.nStart
                                // <= if it has end and isn't empty
                            || (pHint->GetEnd()
                                && *pHint->GetEnd() != pHint->GetStart()
                                && *pHint->GetEnd() == rExtent.nStart))
                        {
                            break;
                        }
                        --m_CurrentHint;
                        if (pHint->GetAnyEnd() <= rExtent.nEnd)
                        {
                            if (ppNode)
                            {
                                *ppNode = rExtent.pNode;
                            }
                            return pHint;
                        }
                    }
                }
                --m_CurrentExtent;
                if (0 < m_CurrentExtent &&
                    rExtent.pNode != m_pMerged->extents[m_CurrentExtent-1].pNode)
                {
                    SwpHints const*const pHints(
                        m_pMerged->extents[m_CurrentExtent-1].pNode->GetpSwpHints());
                    m_CurrentHint = pHints ? pHints->Count() : 0; // reset
                    if (pHints)
                        pHints->SortIfNeedBe();
                }
            }
            return nullptr;
        }
        else
        {
            SwpHints const*const pHints(m_pNode->GetpSwpHints());
            if (pHints && 0 < m_CurrentHint)
            {
                SwTextAttr const*const pHint(pHints->GetSortedByEnd(m_CurrentHint - 1));
                --m_CurrentHint;
                if (ppNode)
                {
                    *ppNode = m_pNode;
                }
                return pHint;
            }
            return nullptr;
        }
    }

    bool FrameContainsNode(SwContentFrame const& rFrame, SwNodeOffset const nNodeIndex)
    {
        if (rFrame.IsTextFrame())
        {
            SwTextFrame const& rTextFrame(static_cast<SwTextFrame const&>(rFrame));
            if (sw::MergedPara const*const pMerged = rTextFrame.GetMergedPara())
            {
                SwNodeOffset const nFirst(pMerged->pFirstNode->GetIndex());
                SwNodeOffset const nLast(pMerged->pLastNode->GetIndex());
                return (nFirst <= nNodeIndex && nNodeIndex <= nLast);
            }
            else
            {
                return rTextFrame.GetTextNodeFirst()->GetIndex() == nNodeIndex;
            }
        }
        else
        {
            assert(rFrame.IsNoTextFrame());
            return static_cast<SwNoTextFrame const&>(rFrame).GetNode()->GetIndex() == nNodeIndex;
        }
    }

    bool IsParaPropsNode(SwRootFrame const& rLayout, SwTextNode const& rNode)
    {
        if (rLayout.HasMergedParas())
        {
            if (SwTextFrame const*const pFrame = static_cast<SwTextFrame*>(rNode.getLayoutFrame(&rLayout)))
            {
                sw::MergedPara const*const pMerged(pFrame->GetMergedPara());
                if (pMerged && pMerged->pParaPropsNode != &rNode)
                {
                    return false;
                }
            }
        }
        return true;
    }

    SwTextNode *
    GetParaPropsNode(SwRootFrame const& rLayout, SwNode const& rPos)
    {
        const SwTextNode *const pTextNode(rPos.GetTextNode());
        if (pTextNode && !sw::IsParaPropsNode(rLayout, *pTextNode))
        {
            return static_cast<SwTextFrame*>(pTextNode->getLayoutFrame(&rLayout))->GetMergedPara()->pParaPropsNode;
        }
        else
        {
            return const_cast<SwTextNode*>(pTextNode);
        }
    }

    SwPosition
    GetParaPropsPos(SwRootFrame const& rLayout, SwPosition const& rPos)
    {
        SwPosition pos(rPos);
        SwTextNode const*const pNode(pos.GetNode().GetTextNode());
        if (pNode)
            pos.Assign( *sw::GetParaPropsNode(rLayout, *pNode) );
        return pos;
    }

    std::pair<SwTextNode *, SwTextNode *>
    GetFirstAndLastNode(SwRootFrame const& rLayout, SwNode const& rPos)
    {
        SwTextNode *const pTextNode(const_cast<SwTextNode*>(rPos.GetTextNode()));
        if (pTextNode && rLayout.HasMergedParas())
        {
            if (SwTextFrame const*const pFrame = static_cast<SwTextFrame*>(pTextNode->getLayoutFrame(&rLayout)))
            {
                if (sw::MergedPara const*const pMerged = pFrame->GetMergedPara())
                {
                    return std::make_pair(pMerged->pFirstNode, const_cast<SwTextNode*>(pMerged->pLastNode));
                }
            }
        }
        return std::make_pair(pTextNode, pTextNode);
    }

    SwTextNode const& GetAttrMerged(SfxItemSet & rFormatSet,
            SwTextNode const& rNode, SwRootFrame const*const pLayout)
    {
        rNode.SwContentNode::GetAttr(rFormatSet);
        if (pLayout && pLayout->HasMergedParas())
        {
            auto pFrame = static_cast<SwTextFrame*>(rNode.getLayoutFrame(pLayout));
            if (sw::MergedPara const*const pMerged = pFrame ? pFrame->GetMergedPara() : nullptr)
            {
                if (pMerged->pFirstNode != &rNode)
                {
                    rFormatSet.ClearItem(RES_PAGEDESC);
                    rFormatSet.ClearItem(RES_BREAK);
                    static_assert(RES_PAGEDESC + 1 == sal_uInt16(RES_BREAK),
                            "first-node items must be adjacent");
                    SfxItemSetFixed<RES_PAGEDESC, RES_BREAK> firstSet(*rFormatSet.GetPool());
                    pMerged->pFirstNode->SwContentNode::GetAttr(firstSet);
                    rFormatSet.Put(firstSet);

                }
                if (pMerged->pParaPropsNode != &rNode)
                {
                    for (sal_uInt16 i = RES_PARATR_BEGIN; i != RES_FRMATR_END; ++i)
                    {
                        if (i != RES_PAGEDESC && i != RES_BREAK)
                        {
                            rFormatSet.ClearItem(i);
                        }
                    }
                    for (sal_uInt16 i = XATTR_FILL_FIRST; i <= XATTR_FILL_LAST; ++i)
                    {
                        rFormatSet.ClearItem(i);
                    }
                    SfxItemSetFixed<RES_PARATR_BEGIN, RES_PAGEDESC,
                                   RES_BREAK+1, RES_FRMATR_END,
                                   XATTR_FILL_FIRST, XATTR_FILL_LAST+1>
                         propsSet(*rFormatSet.GetPool());
                    pMerged->pParaPropsNode->SwContentNode::GetAttr(propsSet);
                    rFormatSet.Put(propsSet);
                    return *pMerged->pParaPropsNode;
                }
                // keep all the CHRATR/UNKNOWNATR anyway...
            }
        }
        return rNode;
    }

} // namespace sw

/// Switches width and height of the text frame
void SwTextFrame::SwapWidthAndHeight()
{
    {
        SwFrameAreaDefinition::FramePrintAreaWriteAccess aPrt(*this);

        if ( ! mbIsSwapped )
        {
            const tools::Long nPrtOfstX = aPrt.Pos().X();
            aPrt.Pos().setX( aPrt.Pos().Y() );

            if( IsVertLR() )
            {
                aPrt.Pos().setY( nPrtOfstX );
            }
            else
            {
                aPrt.Pos().setY( getFrameArea().Width() - ( nPrtOfstX + aPrt.Width() ) );
            }
        }
        else
        {
            const tools::Long nPrtOfstY = aPrt.Pos().Y();
            aPrt.Pos().setY( aPrt.Pos().X() );

            if( IsVertLR() )
            {
                aPrt.Pos().setX( nPrtOfstY );
            }
            else
            {
                aPrt.Pos().setX( getFrameArea().Height() - ( nPrtOfstY + aPrt.Height() ) );
            }
        }

        const tools::Long nPrtWidth = aPrt.Width();
        aPrt.Width( aPrt.Height() );
        aPrt.Height( nPrtWidth );
    }

    {
        const tools::Long nFrameWidth = getFrameArea().Width();
        SwFrameAreaDefinition::FrameAreaWriteAccess aFrm(*this);
        aFrm.Width( aFrm.Height() );
        aFrm.Height( nFrameWidth );
    }

    mbIsSwapped = ! mbIsSwapped;
}

/**
 * Calculates the coordinates of a rectangle when switching from
 * horizontal to vertical layout.
 */
void SwTextFrame::SwitchHorizontalToVertical( SwRect& rRect ) const
{
    // calc offset inside frame
    tools::Long nOfstX, nOfstY;
    if ( IsVertLR() )
    {
        if (IsVertLRBT())
        {
            // X and Y offsets here mean the position of the point that will be the top left corner
            // after the switch.
            nOfstX = rRect.Left() + rRect.Width() - getFrameArea().Left();
            nOfstY = rRect.Top() - getFrameArea().Top();
        }
        else
        {
            nOfstX = rRect.Left() - getFrameArea().Left();
            nOfstY = rRect.Top() - getFrameArea().Top();
        }
    }
    else
    {
        nOfstX = rRect.Left() - getFrameArea().Left();
        nOfstY = rRect.Top() + rRect.Height() - getFrameArea().Top();
    }

    const tools::Long nWidth = rRect.Width();
    const tools::Long nHeight = rRect.Height();

    if ( IsVertLR() )
    {
        rRect.Left(getFrameArea().Left() + nOfstY);
    }
    else
    {
        if ( mbIsSwapped )
            rRect.Left( getFrameArea().Left() + getFrameArea().Height() - nOfstY );
        else
            // frame is rotated
            rRect.Left( getFrameArea().Left() + getFrameArea().Width() - nOfstY );
    }

    if (IsVertLRBT())
    {
        if (mbIsSwapped)
            rRect.Top(getFrameArea().Top() + getFrameArea().Width() - nOfstX);
        else
            rRect.Top(getFrameArea().Top() + getFrameArea().Height() - nOfstX);
    }
    else
        rRect.Top(getFrameArea().Top() + nOfstX);
    rRect.Width( nHeight );
    rRect.Height( nWidth );
}

/**
 * Calculates the coordinates of a point when switching from
 * horizontal to vertical layout.
 */
void SwTextFrame::SwitchHorizontalToVertical( Point& rPoint ) const
{
    if (IsVertLRBT())
    {
        // The horizontal origo is the top left corner, the LRBT origo is the
        // bottom left corner. Finally x and y has to be swapped.
        SAL_WARN_IF(!mbIsSwapped, "sw.core",
                    "SwTextFrame::SwitchHorizontalToVertical, IsVertLRBT, not swapped");
        Point aPoint(rPoint);
        rPoint.setX(getFrameArea().Left() + (aPoint.Y() - getFrameArea().Top()));
        // This would be bottom - x delta, but bottom is top + height, finally
        // width (and not height), as it's swapped.
        rPoint.setY(getFrameArea().Top() + getFrameArea().Width()
                    - (aPoint.X() - getFrameArea().Left()));
        return;
    }

    // calc offset inside frame
    const tools::Long nOfstX = rPoint.X() - getFrameArea().Left();
    const tools::Long nOfstY = rPoint.Y() - getFrameArea().Top();
    if ( IsVertLR() )
        rPoint.setX( getFrameArea().Left() + nOfstY );
    else
    {
        if ( mbIsSwapped )
            rPoint.setX( getFrameArea().Left() + getFrameArea().Height() - nOfstY );
        else
            // calc rotated coords
            rPoint.setX( getFrameArea().Left() + getFrameArea().Width() - nOfstY );
    }

    rPoint.setY( getFrameArea().Top() + nOfstX );
}

/**
 * Calculates the a limit value when switching from
 * horizontal to vertical layout.
 */
tools::Long SwTextFrame::SwitchHorizontalToVertical( tools::Long nLimit ) const
{
    Point aTmp( 0, nLimit );
    SwitchHorizontalToVertical( aTmp );
    return aTmp.X();
}

/**
 * Calculates the coordinates of a rectangle when switching from
 * vertical to horizontal layout.
 */
void SwTextFrame::SwitchVerticalToHorizontal( SwRect& rRect ) const
{
    tools::Long nOfstX;

    // calc offset inside frame
    if ( IsVertLR() )
        nOfstX = rRect.Left() - getFrameArea().Left();
    else
    {
        if ( mbIsSwapped )
            nOfstX = getFrameArea().Left() + getFrameArea().Height() - ( rRect.Left() + rRect.Width() );
        else
            nOfstX = getFrameArea().Left() + getFrameArea().Width() - ( rRect.Left() + rRect.Width() );
    }

    tools::Long nOfstY;
    if (IsVertLRBT())
    {
        // Note that mbIsSwapped only affects the frame area, not rRect, so rRect.Height() is used
        // here unconditionally.
        if (mbIsSwapped)
            nOfstY = getFrameArea().Top() + getFrameArea().Width() - (rRect.Top() + rRect.Height());
        else
            nOfstY = getFrameArea().Top() + getFrameArea().Height() - (rRect.Top() + rRect.Height());
    }
    else
        nOfstY = rRect.Top() - getFrameArea().Top();
    const tools::Long nWidth = rRect.Height();
    const tools::Long nHeight = rRect.Width();

    // calc rotated coords
    rRect.Left( getFrameArea().Left() + nOfstY );
    rRect.Top( getFrameArea().Top() + nOfstX );
    rRect.Width( nWidth );
    rRect.Height( nHeight );
}

/**
 * Calculates the coordinates of a point when switching from
 * vertical to horizontal layout.
 */
void SwTextFrame::SwitchVerticalToHorizontal( Point& rPoint ) const
{
    tools::Long nOfstX;

    // calc offset inside frame
    if ( IsVertLR() )
        // X offset is Y - left.
        nOfstX = rPoint.X() - getFrameArea().Left();
    else
    {
        // X offset is right - X.
        if ( mbIsSwapped )
            nOfstX = getFrameArea().Left() + getFrameArea().Height() - rPoint.X();
        else
            nOfstX = getFrameArea().Left() + getFrameArea().Width() - rPoint.X();
    }

    tools::Long nOfstY;
    if (IsVertLRBT())
    {
        // Y offset is bottom - Y.
        if (mbIsSwapped)
            nOfstY = getFrameArea().Top() + getFrameArea().Width() - rPoint.Y();
        else
            nOfstY = getFrameArea().Top() + getFrameArea().Height() - rPoint.Y();
    }
    else
        // Y offset is Y - top.
        nOfstY = rPoint.Y() - getFrameArea().Top();

    // calc rotated coords
    rPoint.setX( getFrameArea().Left() + nOfstY );
    rPoint.setY( getFrameArea().Top() + nOfstX );
}

/**
 * Calculates the a limit value when switching from
 * vertical to horizontal layout.
 */
tools::Long SwTextFrame::SwitchVerticalToHorizontal( tools::Long nLimit ) const
{
    Point aTmp( nLimit, 0 );
    SwitchVerticalToHorizontal( aTmp );
    return aTmp.Y();
}

SwFrameSwapper::SwFrameSwapper( const SwTextFrame* pTextFrame, bool bSwapIfNotSwapped )
    : pFrame( pTextFrame ), bUndo( false )
{
    if (pFrame->IsVertical() && bSwapIfNotSwapped != pFrame->IsSwapped())
    {
        bUndo = true;
        const_cast<SwTextFrame*>(pFrame)->SwapWidthAndHeight();
    }
}

SwFrameSwapper::~SwFrameSwapper()
{
    if ( bUndo )
        const_cast<SwTextFrame*>(pFrame)->SwapWidthAndHeight();
}

void SwTextFrame::SwitchLTRtoRTL( SwRect& rRect ) const
{
    SwSwapIfNotSwapped swap(const_cast<SwTextFrame *>(this));

    tools::Long nWidth = rRect.Width();
    rRect.Left( 2 * ( getFrameArea().Left() + getFramePrintArea().Left() ) +
                getFramePrintArea().Width() - rRect.Right() - 1 );

    rRect.Width( nWidth );
}

void SwTextFrame::SwitchLTRtoRTL( Point& rPoint ) const
{
    SwSwapIfNotSwapped swap(const_cast<SwTextFrame *>(this));

    rPoint.setX( 2 * ( getFrameArea().Left() + getFramePrintArea().Left() ) + getFramePrintArea().Width() - rPoint.X() - 1 );
}

SwLayoutModeModifier::SwLayoutModeModifier( const OutputDevice& rOutp ) :
        m_rOut( rOutp ), m_nOldLayoutMode( rOutp.GetLayoutMode() )
{
}

SwLayoutModeModifier::~SwLayoutModeModifier()
{
    const_cast<OutputDevice&>(m_rOut).SetLayoutMode( m_nOldLayoutMode );
}

void SwLayoutModeModifier::Modify( bool bChgToRTL )
{
    const_cast<OutputDevice&>(m_rOut).SetLayoutMode( bChgToRTL ?
                                         vcl::text::ComplexTextLayoutFlags::BiDiStrong | vcl::text::ComplexTextLayoutFlags::BiDiRtl :
                                         vcl::text::ComplexTextLayoutFlags::BiDiStrong );
}

void SwLayoutModeModifier::SetAuto()
{
    const vcl::text::ComplexTextLayoutFlags nNewLayoutMode = m_nOldLayoutMode & ~vcl::text::ComplexTextLayoutFlags::BiDiStrong;
    const_cast<OutputDevice&>(m_rOut).SetLayoutMode( nNewLayoutMode );
}

SwDigitModeModifier::SwDigitModeModifier( const OutputDevice& rOutp, LanguageType eCurLang,
                                          SvtCTLOptions::TextNumerals eCTLTextNumerals ) :
        rOut( rOutp ), nOldLanguageType( rOutp.GetDigitLanguage() )
{
    LanguageType eLang = eCurLang;
    if (comphelper::IsFuzzing())
        eLang = LANGUAGE_ENGLISH_US;
    else
    {
        if ( SvtCTLOptions::NUMERALS_HINDI == eCTLTextNumerals )
            eLang = LANGUAGE_ARABIC_SAUDI_ARABIA;
        else if ( SvtCTLOptions::NUMERALS_ARABIC == eCTLTextNumerals )
            eLang = LANGUAGE_ENGLISH;
        else if ( SvtCTLOptions::NUMERALS_SYSTEM == eCTLTextNumerals )
            eLang = ::GetAppLanguage();
    }

    const_cast<OutputDevice&>(rOut).SetDigitLanguage( eLang );
}

SwDigitModeModifier::~SwDigitModeModifier()
{
    const_cast<OutputDevice&>(rOut).SetDigitLanguage( nOldLanguageType );
}

void SwTextFrame::Init()
{
    OSL_ENSURE( !IsLocked(), "+SwTextFrame::Init: this is locked." );
    if( !IsLocked() )
    {
        ClearPara();
        SetHasRotatedPortions(false);
        // set flags directly to save a ResetPreps call,
        // and thereby an unnecessary GetPara call
        // don't set bOrphan, bLocked or bWait to false!
        // bOrphan = bFlag7 = bFlag8 = false;
    }
}

SwTextFrame::SwTextFrame(SwTextNode * const pNode, SwFrame* pSib,
        sw::FrameMode const eMode)
    : SwContentFrame( pNode, pSib )
    , mnAllLines( 0 )
    , mnThisLines( 0 )
    , mnFlyAnchorOfst( 0 )
    , mnFlyAnchorOfstNoWrap( 0 )
    , mnFlyAnchorVertOfstNoWrap( 0 )
    , mnFootnoteLine( 0 )
    , mnHeightOfLastLine( 0 )
    , mnAdditionalFirstLineOffset( 0 )
    , mnOffset( 0 )
    , mnNoHyphOffset( COMPLETE_STRING )
    , mnNoHyphEndZone( 0 )
    , mnCacheIndex( USHRT_MAX )
    , mbLocked( false )
    , mbWidow( false )
    , mbJustWidow( false )
    , mbEmpty( false )
    , mbInFootnoteConnect( false )
    , mbFootnote( false )
    , mbRepaint( false )
    , mbHasRotatedPortions( false )
    , mbFieldFollow( false )
    , mbHasAnimation( false )
    , mbIsSwapped( false )
    , mbFollowFormatAllowed( true )
{
    mnFrameType = SwFrameType::Txt;
    // note: this may call SwClientNotify if it's in a list so do it last
    // note: this may change this->pRegisteredIn to m_pMergedPara->listeners
    m_pMergedPara = CheckParaRedlineMerge(*this, *pNode, eMode);
}

void SwTextFrame::dumpAsXmlAttributes(xmlTextWriterPtr writer) const
{
    SwContentFrame::dumpAsXmlAttributes(writer);

    const SwTextNode *pTextNode = GetTextNodeFirst();
    (void)xmlTextWriterWriteFormatAttribute( writer, BAD_CAST( "txtNodeIndex" ), "%" SAL_PRIdINT32, sal_Int32(pTextNode->GetIndex()) );

    OString aMode = "Horizontal"_ostr;
    if (IsVertLRBT())
    {
        aMode = "VertBTLR"_ostr;
    }
    else if (IsVertLR())
    {
        aMode = "VertLR"_ostr;
    }
    else if (IsVertical())
    {
        aMode = "Vertical"_ostr;
    }
    (void)xmlTextWriterWriteAttribute(writer, BAD_CAST("WritingMode"), BAD_CAST(aMode.getStr()));
}

void SwTextFrame::dumpAsXml(xmlTextWriterPtr writer) const
{
    (void)xmlTextWriterStartElement(writer, reinterpret_cast<const xmlChar*>("txt"));
    dumpAsXmlAttributes( writer );
    if ( HasFollow() )
        (void)xmlTextWriterWriteFormatAttribute( writer, BAD_CAST( "follow" ), "%" SAL_PRIuUINT32, GetFollow()->GetFrameId() );

    if (m_pPrecede != nullptr)
        (void)xmlTextWriterWriteFormatAttribute( writer, BAD_CAST( "precede" ), "%" SAL_PRIuUINT32, static_cast<SwTextFrame*>(m_pPrecede)->GetFrameId() );

    (void)xmlTextWriterWriteAttribute(writer, BAD_CAST("offset"), BAD_CAST(OString::number(static_cast<sal_Int32>(mnOffset)).getStr()));

    sw::MergedPara const*const pMerged(GetMergedPara());
    if (pMerged)
    {
        (void)xmlTextWriterStartElement( writer, BAD_CAST( "merged" ) );
        (void)xmlTextWriterWriteFormatAttribute( writer, BAD_CAST( "paraPropsNodeIndex" ), "%" SAL_PRIdINT32, sal_Int32(pMerged->pParaPropsNode->GetIndex()) );
        for (auto const& e : pMerged->extents)
        {
            (void)xmlTextWriterStartElement( writer, BAD_CAST( "extent" ) );
            (void)xmlTextWriterWriteFormatAttribute( writer, BAD_CAST( "txtNodeIndex" ), "%" SAL_PRIdINT32, sal_Int32(e.pNode->GetIndex()) );
            (void)xmlTextWriterWriteFormatAttribute( writer, BAD_CAST( "start" ), "%" SAL_PRIdINT32, e.nStart );
            (void)xmlTextWriterWriteFormatAttribute( writer, BAD_CAST( "end" ), "%" SAL_PRIdINT32, e.nEnd );
            (void)xmlTextWriterEndElement( writer );
        }
        (void)xmlTextWriterEndElement( writer );
    }

    (void)xmlTextWriterStartElement(writer, BAD_CAST("infos"));
    dumpInfosAsXml(writer);
    (void)xmlTextWriterEndElement(writer);

    // Dump Anchored objects if any
    const SwSortedObjs* pAnchored = GetDrawObjs();
    if ( pAnchored && pAnchored->size() > 0 )
    {
        (void)xmlTextWriterStartElement( writer, BAD_CAST( "anchored" ) );

        for (SwAnchoredObject* pObject : *pAnchored)
        {
            pObject->dumpAsXml( writer );
        }

        (void)xmlTextWriterEndElement( writer );
    }

    // Dump the children
    OUString aText = GetText(  );
    for ( int i = 0; i < 32; i++ )
    {
        aText = aText.replace( i, '*' );
    }
    auto nTextOffset = static_cast<sal_Int32>(GetOffset());
    sal_Int32 nTextLength = aText.getLength() - nTextOffset;
    if (const SwTextFrame* pTextFrameFollow = GetFollow())
    {
        nTextLength = static_cast<sal_Int32>(pTextFrameFollow->GetOffset() - GetOffset());
    }
    if (nTextLength > 0)
    {
        OString aText8
            = OUStringToOString(aText.subView(nTextOffset, nTextLength), RTL_TEXTENCODING_UTF8);
        (void)xmlTextWriterWriteString( writer,
                reinterpret_cast<const xmlChar *>(aText8.getStr(  )) );
    }
    if (const SwParaPortion* pPara = GetPara())
    {
        (void)xmlTextWriterStartElement(writer, BAD_CAST("SwParaPortion"));
        TextFrameIndex nOffset(0);
        const OUString& rText = GetText();
        (void)xmlTextWriterWriteFormatAttribute(writer, BAD_CAST("ptr"), "%p", pPara);
        const SwLineLayout* pLine = pPara;
        if (IsFollow())
        {
            nOffset += GetOffset();
        }
        while (pLine)
        {
            (void)xmlTextWriterStartElement(writer, BAD_CAST("SwLineLayout"));
            pLine->dumpAsXmlAttributes(writer, rText, nOffset);
            const SwLinePortion* pPor = pLine->GetFirstPortion();
            while (pPor)
            {
                pPor->dumpAsXml(writer, rText, nOffset);
                pPor = pPor->GetNextPortion();
            }
            (void)xmlTextWriterEndElement(writer);
            pLine = pLine->GetNext();
        }
        (void)xmlTextWriterEndElement(writer);
    }

    (void)xmlTextWriterEndElement(writer);
}

namespace sw {

SwTextFrame * MakeTextFrame(SwTextNode & rNode, SwFrame *const pSibling,
        sw::FrameMode const eMode)
{
    return new SwTextFrame(&rNode, pSibling, eMode);
}

void RemoveFootnotesForNode(
        SwRootFrame const& rLayout, SwTextNode const& rTextNode,
        std::vector<std::pair<sal_Int32, sal_Int32>> const*const pExtents)
{
    if (pExtents && pExtents->empty())
    {
        return; // nothing to do
    }
    const SwFootnoteIdxs &rFootnoteIdxs = rTextNode.GetDoc().GetFootnoteIdxs();
    size_t nPos = 0;
    SwNodeOffset const nIndex = rTextNode.GetIndex();
    rFootnoteIdxs.SeekEntry( rTextNode, &nPos );
    if (nPos < rFootnoteIdxs.size())
    {
        while (nPos > 0 && rTextNode == (rFootnoteIdxs[ nPos ]->GetTextNode()))
            --nPos;
        if (nPos || rTextNode != (rFootnoteIdxs[ nPos ]->GetTextNode()))
            ++nPos;
    }
    size_t iter(0);
    for ( ; nPos < rFootnoteIdxs.size(); ++nPos)
    {
        SwTextFootnote* pTextFootnote = rFootnoteIdxs[ nPos ];
        if (pTextFootnote->GetTextNode().GetIndex() > nIndex)
            break;
        if (pExtents)
        {
            while ((*pExtents)[iter].second <= pTextFootnote->GetStart())
            {
                ++iter;
                if (iter == pExtents->size())
                {
                    return;
                }
            }
            if (pTextFootnote->GetStart() < (*pExtents)[iter].first)
            {
                continue;
            }
        }
        pTextFootnote->DelFrames(&rLayout);
    }
}

} // namespace sw

void SwTextFrame::DestroyImpl()
{
    // Remove associated SwParaPortion from s_pTextCache
    ClearPara();

    assert(!GetDoc().IsInDtor()); // this shouldn't be happening with ViewShell owning layout
    if (!GetDoc().IsInDtor() && HasFootnote())
    {
        if (m_pMergedPara)
        {
            SwTextNode const* pNode(nullptr);
            for (auto const& e : m_pMergedPara->extents)
            {
                if (e.pNode != pNode)
                {
                    pNode = e.pNode;
                    // sw_redlinehide: not sure if it's necessary to check
                    // if the nodes are still alive here, which would require
                    // accessing WriterMultiListener::m_vDepends
                    sw::RemoveFootnotesForNode(*getRootFrame(), *pNode, nullptr);
                }
            }
        }
        else
        {
            SwTextNode *const pNode(static_cast<SwTextNode*>(GetDep()));
            if (pNode)
            {
                sw::RemoveFootnotesForNode(*getRootFrame(), *pNode, nullptr);
            }
        }
    }

    if (!GetDoc().IsInDtor())
    {
        if (SwView* pView = GetActiveView())
            pView->GetEditWin().GetFrameControlsManager().RemoveControls(this);
    }

    SwContentFrame::DestroyImpl();
}

SwTextFrame::~SwTextFrame()
{
    RemoveFromCache();
}

namespace sw {

// 1. if real insert => correct nStart/nEnd for full nLen
// 2. if rl un-delete => do not correct nStart/nEnd but just include un-deleted
static TextFrameIndex UpdateMergedParaForInsert(MergedPara & rMerged,
        sw::ParagraphBreakMode const eMode, SwScriptInfo *const pScriptInfo,
        bool const isRealInsert,
        SwTextNode const& rNode, sal_Int32 const nIndex, sal_Int32 const nLen)
{
    assert(!isRealInsert || nLen); // can 0 happen? yes, for redline in empty node
    assert(nIndex <= rNode.Len());
    assert(nIndex + nLen <= rNode.Len());
    assert(rMerged.pFirstNode->GetIndex() <= rNode.GetIndex() && rNode.GetIndex() <= rMerged.pLastNode->GetIndex());
    if (!nLen)
    {
        return TextFrameIndex(0);
    }
    OUStringBuffer text(rMerged.mergedText);
    sal_Int32 nTFIndex(0); // index used for insertion at the end
    sal_Int32 nInserted(0);
    bool bInserted(false);
    bool bFoundNode(false);
    auto itInsert(rMerged.extents.end());
    for (auto it = rMerged.extents.begin(); it != rMerged.extents.end(); ++it)
    {
        if (it->pNode == &rNode)
        {
            if (isRealInsert)
            {
                bFoundNode = true;
                if (it->nStart <= nIndex && nIndex <= it->nEnd)
                {   // note: this can happen only once
                    text.insert(nTFIndex + (nIndex - it->nStart),
                            rNode.GetText().subView(nIndex, nLen));
                    it->nEnd += nLen;
                    nInserted = nLen;
                    assert(!bInserted);
                    bInserted = true;
                }
                else if (nIndex < it->nStart)
                {
                    if (itInsert == rMerged.extents.end())
                    {
                        itInsert = it;
                    }
                    it->nStart += nLen;
                    it->nEnd += nLen;
                }
            }
            else
            {
                assert(it == rMerged.extents.begin() || (it-1)->pNode != &rNode || (it-1)->nEnd < nIndex);
                if (nIndex + nLen < it->nStart)
                {
                    itInsert = it;
                    break;
                }
                if (nIndex < it->nStart)
                {
                    text.insert(nTFIndex,
                        rNode.GetText().subView(nIndex, it->nStart - nIndex));
                    nInserted += it->nStart - nIndex;
                    it->nStart = nIndex;
                    bInserted = true;
                }
                assert(it->nStart <= nIndex);
                if (nIndex <= it->nEnd)
                {
                    nTFIndex += it->nEnd - it->nStart;
                    while (it->nEnd < nIndex + nLen)
                    {
                        auto *const pNext(
                            (it+1) != rMerged.extents.end() && (it+1)->pNode == it->pNode
                                ? &*(it+1)
                                : nullptr);
                        if (pNext && pNext->nStart <= nIndex + nLen)
                        {
                            text.insert(nTFIndex,
                                rNode.GetText().subView(it->nEnd, pNext->nStart - it->nEnd));
                            nTFIndex += pNext->nStart - it->nEnd;
                            nInserted += pNext->nStart - it->nEnd;
                            pNext->nStart = it->nStart;
                            it = rMerged.extents.erase(it);
                        }
                        else
                        {
                            text.insert(nTFIndex,
                                rNode.GetText().subView(it->nEnd, nIndex + nLen - it->nEnd));
                            nTFIndex += nIndex + nLen - it->nEnd;
                            nInserted += nIndex + nLen - it->nEnd;
                            it->nEnd = nIndex + nLen;
                        }
                    }
                    bInserted = true;
                    break;
                }
            }
        }
        else if (rNode.GetIndex() < it->pNode->GetIndex() || bFoundNode)
        {
            if (itInsert == rMerged.extents.end())
            {
                itInsert = it;
            }
            break;
        }
        if (itInsert == rMerged.extents.end())
        {
            nTFIndex += it->nEnd - it->nStart;
        }
    }
//    assert((bFoundNode || rMerged.extents.empty()) && "text node not found - why is it sending hints to us");
    if (!bInserted)
    {   // must be in a gap
        rMerged.extents.emplace(itInsert, const_cast<SwTextNode*>(&rNode), nIndex, nIndex + nLen);
        text.insert(nTFIndex, rNode.GetText().subView(nIndex, nLen));
        nInserted = nLen;
        // called from SwRangeRedline::InvalidateRange()
        if (rNode.GetRedlineMergeFlag() == SwNode::Merge::Hidden)
        {
            const_cast<SwTextNode&>(rNode).SetRedlineMergeFlag(SwNode::Merge::NonFirst);
        }
    }
    rMerged.mergedText = text.makeStringAndClear();
    if ((!bInserted && rMerged.extents.size() == 1) // also if it was empty!
        || rNode.GetIndex() <= rMerged.pParaPropsNode->GetIndex())
    {   // text inserted before current para-props node
        SwTextNode *const pOldParaPropsNode{rMerged.pParaPropsNode};
        FindParaPropsNodeIgnoreHidden(rMerged, eMode, pScriptInfo);
        if (rMerged.pParaPropsNode != pOldParaPropsNode)
        {
            pOldParaPropsNode->RemoveFromListRLHidden();
            rMerged.pParaPropsNode->AddToListRLHidden();
        }
    }
    return TextFrameIndex(nInserted);
}

// 1. if real delete => correct nStart/nEnd for full nLen
// 2. if rl delete => do not correct nStart/nEnd but just exclude deleted
TextFrameIndex UpdateMergedParaForDelete(MergedPara & rMerged,
        sw::ParagraphBreakMode const eMode, SwScriptInfo *const pScriptInfo,
        bool const isRealDelete,
        SwTextNode const& rNode, sal_Int32 nIndex, sal_Int32 const nLen)
{
    assert(nIndex <= rNode.Len());
    assert(rMerged.pFirstNode->GetIndex() <= rNode.GetIndex() && rNode.GetIndex() <= rMerged.pLastNode->GetIndex());
    OUStringBuffer text(rMerged.mergedText);
    sal_Int32 nTFIndex(0);
    sal_Int32 nToDelete(nLen);
    sal_Int32 nDeleted(0);
    size_t nFoundNode(0);
//    size_t nErased(0);
    auto it = rMerged.extents.begin();
    for (; it != rMerged.extents.end(); )
    {
        bool bErase(false);
        if (it->pNode == &rNode)
        {
            ++nFoundNode;
            if (nIndex + nToDelete < it->nStart)
            {
                nToDelete = 0;
                if (!isRealDelete)
                {
                    break;
                }
                it->nStart -= nLen;
                it->nEnd -= nLen;
            }
            else
            {
                if (nIndex < it->nStart)
                {
                    // do not adjust nIndex into the text frame index space!
                    nToDelete -= it->nStart - nIndex;
                    nIndex = it->nStart;
                    // note: continue with the if check below, no else!
                }
                if (it->nStart <= nIndex && nIndex < it->nEnd)
                {
                    sal_Int32 const nDeleteHere(nIndex + nToDelete <= it->nEnd
                            ? nToDelete
                            : it->nEnd - nIndex);
                    text.remove(nTFIndex + (nIndex - it->nStart), nDeleteHere);
                    bErase = nDeleteHere == it->nEnd - it->nStart;
                    if (bErase)
                    {
//                        ++nErased;
                        assert(it->nStart == nIndex);
                        it = rMerged.extents.erase(it);
                    }
                    else if (isRealDelete)
                    {   // adjust for deleted text
                        it->nStart -= (nLen - nToDelete);
                        it->nEnd -= (nLen - nToDelete + nDeleteHere);
                        if (it != rMerged.extents.begin()
                            && (it-1)->pNode == &rNode
                            && (it-1)->nEnd == it->nStart)
                        {   // merge adjacent extents
                            nTFIndex += it->nEnd - it->nStart;
                            (it-1)->nEnd = it->nEnd;
                            it = rMerged.extents.erase(it);
                            bErase = true; // skip increment
                        }
                    }
                    else
                    {   // exclude text marked as deleted
                        if (nIndex + nDeleteHere == it->nEnd)
                        {
                            it->nEnd -= nDeleteHere;
                        }
                        else
                        {
                            if (nIndex == it->nStart)
                            {
                                it->nStart += nDeleteHere;
                            }
                            else
                            {
                                sal_Int32 const nOldEnd(it->nEnd);
                                it->nEnd = nIndex;
                                it = rMerged.extents.emplace(it+1,
                                    it->pNode, nIndex + nDeleteHere, nOldEnd);
                            }
                            assert(nDeleteHere == nToDelete);
                        }
                    }
                    nDeleted += nDeleteHere;
                    nToDelete -= nDeleteHere;
                    nIndex += nDeleteHere;
                    if (!isRealDelete && nToDelete == 0)
                    {
                        break;
                    }
                }
            }
        }
        else if (nFoundNode != 0)
        {
            break;
        }
        if (!bErase)
        {
            nTFIndex += it->nEnd - it->nStart;
            ++it;
        }
    }
//    assert(nFoundNode != 0 && "text node not found - why is it sending hints to us");
    assert(nIndex <= rNode.Len() + nLen);
    // if there's a remaining deletion, it must be in gap at the end of the node
// can't do: might be last one in node was erased   assert(nLen == 0 || rMerged.empty() || (it-1)->nEnd <= nIndex);
    // note: if first node gets deleted then that must call DelFrames as
    // pFirstNode is never updated
    rMerged.mergedText = text.makeStringAndClear();
// could be all-hidden now so always check!    if (nErased && nErased == nFoundNode)
    {   // all visible text from node was erased
#if 1
        if (rMerged.pParaPropsNode == &rNode)
        {
            SwTextNode *const pOldParaPropsNode{rMerged.pParaPropsNode};
            FindParaPropsNodeIgnoreHidden(rMerged, eMode, pScriptInfo);
            if (rMerged.pParaPropsNode != pOldParaPropsNode)
            {
                pOldParaPropsNode->RemoveFromListRLHidden();
                rMerged.pParaPropsNode->AddToListRLHidden();
            }
        }
#endif
// NOPE must listen on all non-hidden nodes; particularly on pLastNode        rMerged.listener.EndListening(&const_cast<SwTextNode&>(rNode));
    }
    return TextFrameIndex(nDeleted);
}

std::pair<SwTextNode*, sal_Int32>
MapViewToModel(MergedPara const& rMerged, TextFrameIndex const i_nIndex)
{
    sal_Int32 nIndex(i_nIndex);
    sw::Extent const* pExtent(nullptr);
    for (const auto& rExt : rMerged.extents)
    {
        pExtent = &rExt;
        if (nIndex < (pExtent->nEnd - pExtent->nStart))
        {
            return std::make_pair(pExtent->pNode, pExtent->nStart + nIndex);
        }
        nIndex = nIndex - (pExtent->nEnd - pExtent->nStart);
    }
    assert(nIndex == 0 && "view index out of bounds");
    return pExtent
        ? std::make_pair(pExtent->pNode, pExtent->nEnd) //1-past-the-end index
        : std::make_pair(const_cast<SwTextNode*>(rMerged.pLastNode), rMerged.pLastNode->Len());
}

TextFrameIndex MapModelToView(MergedPara const& rMerged, SwTextNode const*const pNode, sal_Int32 const nIndex)
{
    assert(rMerged.pFirstNode->GetIndex() <= pNode->GetIndex()
        && pNode->GetIndex() <= rMerged.pLastNode->GetIndex());
    sal_Int32 nRet(0);
    bool bFoundNode(false);
    for (auto const& e : rMerged.extents)
    {
        if (pNode->GetIndex() < e.pNode->GetIndex())
        {
            return TextFrameIndex(nRet);
        }
        if (e.pNode == pNode)
        {
            if (e.nStart <= nIndex && nIndex <= e.nEnd)
            {
                return TextFrameIndex(nRet + (nIndex - e.nStart));
            }
            else if (nIndex < e.nStart)
            {
                // in gap before this extent => map to 0 here TODO???
                return TextFrameIndex(nRet);
            }
            bFoundNode = true;
        }
        else if (bFoundNode)
        {
            break;
        }
        nRet += e.nEnd - e.nStart;
    }
    if (bFoundNode)
    {
        // must be in a gap at the end of the node
        assert(nIndex <= pNode->Len());
        return TextFrameIndex(nRet);
    }
    else if (rMerged.extents.empty())
    {
        assert(nIndex <= pNode->Len());
        return TextFrameIndex(0);
    }
    return TextFrameIndex(rMerged.mergedText.getLength());
}

} // namespace sw

std::pair<SwTextNode*, sal_Int32>
SwTextFrame::MapViewToModel(TextFrameIndex const nIndex) const
{
//nope    assert(GetPara());
    sw::MergedPara const*const pMerged(GetMergedPara());
    if (pMerged)
    {
        return sw::MapViewToModel(*pMerged, nIndex);
    }
    else
    {
        return std::make_pair(static_cast<SwTextNode*>(const_cast<sw::BroadcastingModify*>(
                    SwFrame::GetDep())), sal_Int32(nIndex));
    }
}

SwPosition SwTextFrame::MapViewToModelPos(TextFrameIndex const nIndex) const
{
    std::pair<SwTextNode*, sal_Int32> const ret(MapViewToModel(nIndex));
    return SwPosition(*ret.first, ret.second);
}

TextFrameIndex SwTextFrame::MapModelToView(SwTextNode const*const pNode, sal_Int32 const nIndex) const
{
//nope    assert(GetPara());
    sw::MergedPara const*const pMerged(GetMergedPara());
    if (pMerged)
    {
        return sw::MapModelToView(*pMerged, pNode, nIndex);
    }
    else
    {
        return TextFrameIndex(nIndex);
    }
}

TextFrameIndex SwTextFrame::MapModelToViewPos(SwPosition const& rPos) const
{
    SwTextNode const*const pNode(rPos.GetNode().GetTextNode());
    sal_Int32 const nIndex(rPos.GetContentIndex());
    return MapModelToView(pNode, nIndex);
}

void SwTextFrame::SetMergedPara(std::unique_ptr<sw::MergedPara> p)
{
    SwTextNode *const pFirst(m_pMergedPara ? m_pMergedPara->pFirstNode : nullptr);
    m_pMergedPara = std::move(p);
    if (pFirst)
    {
        if (m_pMergedPara)
        {
            assert(pFirst == m_pMergedPara->pFirstNode);
        }
        else
        {
            pFirst->Add(*this); // must register at node again
        }
    }
    // postcondition: frame must be listening somewhere
    assert(m_pMergedPara || GetDep());
}

const OUString& SwTextFrame::GetText() const
{
//nope    assert(GetPara());
    sw::MergedPara const*const pMerged(GetMergedPara());
    if (pMerged)
        return pMerged->mergedText;
    else
        return static_cast<SwTextNode const*>(SwFrame::GetDep())->GetText();
}

SwTextNode const* SwTextFrame::GetTextNodeForParaProps() const
{
    // FIXME can GetPara be 0 ? yes... this is needed in  SwContentNotify::SwContentNotify() which is called before any formatting is started
//nope    assert(GetPara());
    sw::MergedPara const*const pMerged(GetMergedPara());
    if (pMerged)
    {
//        assert(pMerged->pFirstNode == pMerged->pParaPropsNode); // surprising news!
        return pMerged->pParaPropsNode;
    }
    else
        return static_cast<SwTextNode const*>(SwFrame::GetDep());
}

SwTextNode const* SwTextFrame::GetTextNodeForFirstText() const
{
    sw::MergedPara const*const pMerged(GetMergedPara());
    if (pMerged)
        return pMerged->extents.empty()
            ? pMerged->pFirstNode
            : pMerged->extents.front().pNode;
    else
        return static_cast<SwTextNode const*>(SwFrame::GetDep());
}

SwTextNode const* SwTextFrame::GetTextNodeFirst() const
{
//nope    assert(GetPara());
    sw::MergedPara const*const pMerged(GetMergedPara());
    if (pMerged)
        return pMerged->pFirstNode;
    else
        return static_cast<SwTextNode const*>(SwFrame::GetDep());
}

SwDoc const& SwTextFrame::GetDoc() const
{
    return GetTextNodeFirst()->GetDoc();
}

LanguageType SwTextFrame::GetLangOfChar(TextFrameIndex const nIndex,
        sal_uInt16 const nScript, bool const bNoChar, bool const bNoneIfNoHyphenation) const
{
    // a single character can be mapped uniquely!
    std::pair<SwTextNode const*, sal_Int32> const pos(MapViewToModel(nIndex));
    return pos.first->GetLang(pos.second, bNoChar ? 0 : 1, nScript, bNoneIfNoHyphenation);
}

void SwTextFrame::ResetPreps()
{
    if ( GetCacheIdx() != USHRT_MAX )
    {
        if (SwParaPortion *pPara = GetPara())
            pPara->ResetPreps();
    }
}

static auto FindCellFrame(SwFrame const* pLower) -> SwLayoutFrame const*
{
    while (pLower)
    {
        if (pLower->IsCellFrame())
        {
            return static_cast<SwLayoutFrame const*>(pLower);
        }
        pLower = pLower->GetUpper();
    }
    return nullptr;
}

bool SwTextFrame::IsHiddenNow() const
{
    SwFrameSwapper aSwapper( this, true );

    if( !getFrameArea().Width() && isFrameAreaDefinitionValid() && GetUpper()->isFrameAreaDefinitionValid() ) // invalid when stack overflows (StackHack)!
    {
//        OSL_FAIL( "SwTextFrame::IsHiddenNow: thin frame" );
        return true;
    }

    // TODO: what is the above check good for and can it be removed?
    return IsHiddenNowImpl();
}

bool SwTextFrame::IsHiddenNowImpl() const
{
    if (SwContentFrame::IsHiddenNow())
        return true;

    bool bHiddenCharsHidePara(false);
    bool bHiddenParaField(false);
    if (m_pMergedPara)
    {
        TextFrameIndex nHiddenStart(COMPLETE_STRING);
        TextFrameIndex nHiddenEnd(0);
        bool hasHidden{false};
        if (auto const pScriptInfo = GetScriptInfo())
        {
            hasHidden = pScriptInfo->GetBoundsOfHiddenRange(TextFrameIndex(0),
                    nHiddenStart, nHiddenEnd);
        }
        else // ParaPortion is created in Format, but this is called earlier
        {
            SwScriptInfo aInfo;
            aInfo.InitScriptInfoHidden(*m_pMergedPara->pFirstNode, m_pMergedPara.get());
            hasHidden = aInfo.GetBoundsOfHiddenRange(TextFrameIndex(0),
                        nHiddenStart, nHiddenEnd);
        }
        if ((TextFrameIndex(0) == nHiddenStart
                && TextFrameIndex(GetText().getLength()) <= nHiddenEnd)
            // special case: GetBoundsOfHiddenRange doesn't assign!
            // but it does return that there *is* something hidden, in case
            // the frame is empty then the whole thing must be hidden
            || (hasHidden && m_pMergedPara->mergedText.isEmpty()))
        {
            bHiddenCharsHidePara = true;
        }
        sw::MergedAttrIter iter(*this);
        SwTextNode const* pNode(nullptr);
        int nNewResultWeight = 0;
        for (SwTextAttr const* pHint = iter.NextAttr(&pNode); pHint; pHint = iter.NextAttr(&pNode))
        {
            if (pHint->Which() == RES_TXTATR_FIELD)
            {
                // see also SwpHints::CalcHiddenParaField()
                const SwFormatField& rField = pHint->GetFormatField();
                int nCurWeight = pNode->GetDoc().FieldCanHideParaWeight(rField.GetField()->GetTyp()->Which());
                if (nCurWeight > nNewResultWeight)
                {
                    nNewResultWeight = nCurWeight;
                    bHiddenParaField = pNode->GetDoc().FieldHidesPara(*rField.GetField());
                }
                else if (nCurWeight == nNewResultWeight && bHiddenParaField)
                {
                    // Currently, for both supported hiding types (HiddenPara, Database), "Don't hide"
                    // takes precedence - i.e., if there's a "Don't hide" field of that weight, we only
                    // care about fields of higher weight.
                    bHiddenParaField = pNode->GetDoc().FieldHidesPara(*rField.GetField());
                }
            }
        }
    }
    else
    {
        bHiddenCharsHidePara = static_cast<SwTextNode const*>(SwFrame::GetDep())->HasHiddenCharAttribute( true );
        bHiddenParaField = static_cast<SwTextNode const*>(SwFrame::GetDep())->IsHiddenByParaField();
    }
    if (bHiddenCharsHidePara && GetDoc().getIDocumentSettingAccess().get(
            DocumentSettingId::APPLY_PARAGRAPH_MARK_FORMAT_TO_EMPTY_LINE_AT_END_OF_PARAGRAPH))
    {
        // apparently in Word it's always the last para marker that determines hidden?
        // even in case when they are merged by delete redline (it's obvious when they are merged by hidden-attribute
        SwTextNode const*const pNode{ m_pMergedPara
            ? m_pMergedPara->pLastNode
            : static_cast<SwTextNode const*>(SwFrame::GetDep()) };
        // Word ignores hidden formatting on the cell end marker
        bool isLastInCell{false};
        if (SwLayoutFrame const*const pCellFrame{FindCellFrame(this)})
        {
            SwContentFrame const* pNext{GetNextContentFrame()};
            // skip frame in hidden section ("this" is *not* in hidden section!)
            while (pNext && pNext->SwContentFrame::IsHiddenNow())
            {
                pNext = pNext->GetNextContentFrame();
            }
            isLastInCell = pNext == nullptr || !pCellFrame->IsAnLower(pNext);
        }
        if (!isLastInCell)
        {
            SwFormatAutoFormat const& rListAutoFormat{pNode->GetAttr(RES_PARATR_LIST_AUTOFMT)};
            std::shared_ptr<SfxItemSet> const pSet{rListAutoFormat.GetStyleHandle()};
            SvxCharHiddenItem const* pItem{pSet ? pSet->GetItemIfSet(RES_CHRATR_HIDDEN) : nullptr};
            if (!pItem)
            {
                // don't use node's mpAttrSet, it doesn't apply to para marker
                SwFormatColl const*const pStyle{pNode->GetFormatColl()};
                if (pStyle)
                {
                    pItem = &pStyle->GetFormatAttr(RES_CHRATR_HIDDEN);
                }
            }
            if (!pItem || !pItem->GetValue())
            {
                bHiddenCharsHidePara = false;
            }
        }
    }
    const SwViewShell* pVsh = getRootFrame()->GetCurrShell();

    if ( pVsh && ( bHiddenCharsHidePara || bHiddenParaField ) )
    {

        if (
             ( bHiddenParaField &&
               ( !pVsh->GetViewOptions()->IsShowHiddenPara() &&
                 !pVsh->GetViewOptions()->IsFieldName() ) ) ||
             ( bHiddenCharsHidePara &&
               !pVsh->GetViewOptions()->IsShowHiddenChar() ) )
        {
            // in order to put the cursor in the body text, one paragraph must
            // be visible - check this for the 1st body paragraph
            if (IsInDocBody() && FindPrevCnt() == nullptr)
            {
                for (SwContentFrame const* pNext = FindNextCnt(true);
                        pNext != nullptr; pNext = pNext->FindNextCnt(true))
                {
                    if (!pNext->IsHiddenNow())
                        return true;
                }
                SAL_INFO("sw.core", "unhiding one body paragraph");
                return false;
            }
            return true;
        }
    }

    return false;
}

/// Removes Textfrm's attachments, when it's hidden
void SwTextFrame::HideHidden()
{
    OSL_ENSURE( !GetFollow() && IsHiddenNow(),
            "HideHidden on visible frame of hidden frame has follow" );

    HideFootnotes(GetOffset(), TextFrameIndex(COMPLETE_STRING));
    HideAndShowObjects();

    // format information is obsolete
    ClearPara();
}

void SwTextFrame::HideFootnotes(TextFrameIndex const nStart, TextFrameIndex const nEnd)
{
    SwPageFrame *pPage = nullptr;
    sw::MergedAttrIter iter(*this);
    SwTextNode const* pNode(nullptr);
    for (SwTextAttr const* pHt = iter.NextAttr(&pNode); pHt; pHt = iter.NextAttr(&pNode))
    {
        if (pHt->Which() == RES_TXTATR_FTN)
        {
            TextFrameIndex const nIdx(MapModelToView(pNode, pHt->GetStart()));
            if (nEnd < nIdx)
                break;
            if (nStart <= nIdx)
            {
                if (!pPage)
                    pPage = FindPageFrame();
                pPage->RemoveFootnote( this, static_cast<const SwTextFootnote*>(pHt) );
            }
        }
    }
}

/**
 * as-character anchored graphics, which are used for a graphic bullet list.
 * As long as these graphic bullet list aren't imported, do not hide a
 * at-character anchored object, if
 * (a) the document is an imported WW8 document -
 *     checked by checking certain compatibility options -
 * (b) the paragraph is the last content in the document and
 * (c) the anchor character is an as-character anchored graphic.
 */
bool sw_HideObj( const SwTextFrame& _rFrame,
                  const RndStdIds _eAnchorType,
                  SwFormatAnchor const& rFormatAnchor,
                  SwAnchoredObject* _pAnchoredObj )
{
    bool bRet( true );

    if (_eAnchorType == RndStdIds::FLY_AT_CHAR)
    {
        const IDocumentSettingAccess *const pIDSA = &_rFrame.GetDoc().getIDocumentSettingAccess();
        if ( !pIDSA->get(DocumentSettingId::USE_FORMER_TEXT_WRAPPING) &&
             !pIDSA->get(DocumentSettingId::OLD_LINE_SPACING) &&
             !pIDSA->get(DocumentSettingId::USE_FORMER_OBJECT_POS) &&
              pIDSA->get(DocumentSettingId::CONSIDER_WRAP_ON_OBJECT_POSITION) &&
             _rFrame.IsInDocBody() && !_rFrame.FindNextCnt() )
        {
            SwTextNode const& rNode(*rFormatAnchor.GetAnchorNode()->GetTextNode());
            assert(FrameContainsNode(_rFrame, rNode.GetIndex()));
            sal_Int32 const nObjAnchorPos(rFormatAnchor.GetAnchorContentOffset());
            const sal_Unicode cAnchorChar = nObjAnchorPos < rNode.Len()
                ? rNode.GetText()[nObjAnchorPos]
                : 0;
            if (cAnchorChar == CH_TXTATR_BREAKWORD)
            {
                const SwTextAttr* const pHint(
                    rNode.GetTextAttrForCharAt(nObjAnchorPos, RES_TXTATR_FLYCNT));
                if ( pHint )
                {
                    const SwFrameFormat* pFrameFormat =
                        static_cast<const SwTextFlyCnt*>(pHint)->GetFlyCnt().GetFrameFormat();
                    if ( pFrameFormat->Which() == RES_FLYFRMFMT )
                    {
                        SwNodeIndex nContentIndex = *(pFrameFormat->GetContent().GetContentIdx());
                        ++nContentIndex;
                        if ( nContentIndex.GetNode().IsNoTextNode() )
                        {
                            bRet = false;
                            // set needed data structure values for object positioning
                            SwRectFnSet aRectFnSet(&_rFrame);
                            SwRect aLastCharRect( _rFrame.getFrameArea() );
                            aRectFnSet.SetWidth( aLastCharRect, 1 );
                            _pAnchoredObj->maLastCharRect = aLastCharRect;
                            _pAnchoredObj->mnLastTopOfLine = aRectFnSet.GetTop(aLastCharRect);
                        }
                    }
                }
            }
        }
    }

    return bRet;
}

/**
 * Hide/show objects
 *
 * Method hides respectively shows objects, which are anchored at paragraph,
 * at/as a character of the paragraph, corresponding to the paragraph and
 * paragraph portion visibility.
 *
 * - is called from HideHidden() - should hide objects in hidden paragraphs and
 * - from Format_() - should hide/show objects in partly visible paragraphs
 */
void SwTextFrame::HideAndShowObjects()
{
    if ( GetDrawObjs() )
    {
        if ( IsHiddenNow() )
        {
            // complete paragraph is hidden. Thus, hide all objects
            for (SwAnchoredObject* i : *GetDrawObjs())
            {
                SdrObject* pObj = i->DrawObj();
                SwContact* pContact = static_cast<SwContact*>(pObj->GetUserCall());
                // under certain conditions
                const RndStdIds eAnchorType( pContact->GetAnchorId() );
                if ((eAnchorType != RndStdIds::FLY_AT_CHAR) ||
                    sw_HideObj(*this, eAnchorType, pContact->GetAnchorFormat(),
                                 i ))
                {
                    pContact->MoveObjToInvisibleLayer( pObj );
                }
            }
        }
        else
        {
            // paragraph is visible, but can contain hidden text portion.
            // first we check if objects are allowed to be hidden:
            const SwViewShell* pVsh = getRootFrame()->GetCurrShell();
            const bool bShouldBeHidden = !pVsh || !pVsh->GetWin() ||
                                         !pVsh->GetViewOptions()->IsShowHiddenChar();

            // Thus, show all objects, which are anchored at paragraph and
            // hide/show objects, which are anchored at/as character, according
            // to the visibility of the anchor character.
            for (SwAnchoredObject* i : *GetDrawObjs())
            {
                SdrObject* pObj = i->DrawObj();
                SwContact* pContact = static_cast<SwContact*>(pObj->GetUserCall());
                // Determine anchor type only once
                const RndStdIds eAnchorType( pContact->GetAnchorId() );

                if (eAnchorType == RndStdIds::FLY_AT_PARA)
                {
                    pContact->MoveObjToVisibleLayer( pObj );
                }
                else if ((eAnchorType == RndStdIds::FLY_AT_CHAR) ||
                         (eAnchorType == RndStdIds::FLY_AS_CHAR))
                {
                    sal_Int32 nHiddenStart;
                    sal_Int32 nHiddenEnd;
                    const SwFormatAnchor& rAnchorFormat = pContact->GetAnchorFormat();
                    const SwNode* pNode = rAnchorFormat.GetAnchorNode();
                    // When the object was already removed from text, but the layout hasn't been
                    // updated yet, this can be nullptr:
                    if (!pNode)
                        continue;
                    SwScriptInfo::GetBoundsOfHiddenRange(
                        *pNode->GetTextNode(),
                        rAnchorFormat.GetAnchorContentOffset(), nHiddenStart, nHiddenEnd);
                    // Under certain conditions
                    if ( nHiddenStart != COMPLETE_STRING && bShouldBeHidden &&
                        sw_HideObj(*this, eAnchorType, rAnchorFormat, i))
                    {
                        pContact->MoveObjToInvisibleLayer( pObj );
                    }
                    else
                        pContact->MoveObjToVisibleLayer( pObj );
                }
                else
                {
                    OSL_FAIL( " - object not anchored at/inside paragraph!?" );
                }
            }
        }
    }

    if (IsFollow())
    {
        SwTextFrame *pMaster = FindMaster();
        OSL_ENSURE(pMaster, "SwTextFrame without master");
        if (pMaster)
            pMaster->HideAndShowObjects();
    }
}

void SwLayoutFrame::HideAndShowObjects()
{
    for (SwFrame * pLower = Lower(); pLower; pLower = pLower->GetNext())
    {
        pLower->HideAndShowObjects();
    }
}

void SwFrame::HideAndShowObjects()
{
}

/**
 * Returns the first possible break point in the current line.
 * This method is used in SwTextFrame::Format() to decide whether the previous
 * line has to be formatted as well.
 * nFound is <= nEndLine.
 */
--> --------------------

--> maximum size reached

--> --------------------