Quelle  itrform2.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 <hintids.hxx>

#include <memory>
#include <com/sun/star/i18n/ScriptType.hpp>
#include <editeng/lspcitem.hxx>
#include <txtflcnt.hxx>
#include <txtftn.hxx>
#include <flyfrms.hxx>
#include <fmtflcnt.hxx>
#include <fmtftn.hxx>
#include <ftninfo.hxx>
#include <charfmt.hxx>
#include <editeng/charrotateitem.hxx>
#include <layfrm.hxx>
#include <viewsh.hxx>
#include <viewopt.hxx>
#include <paratr.hxx>
#include "itrform2.hxx"
#include "porrst.hxx"
#include "portab.hxx"
#include "porfly.hxx"
#include "portox.hxx"
#include "porref.hxx"
#include "porfld.hxx"
#include "porftn.hxx"
#include "porhyph.hxx"
#include "pordrop.hxx"
#include "redlnitr.hxx"
#include <sortedobjs.hxx>
#include <fmtanchr.hxx>
#include <pagefrm.hxx>
#include <tgrditem.hxx>
#include <doc.hxx>
#include "pormulti.hxx"
#include <unotools/charclass.hxx>
#include <xmloff/odffields.hxx>
#include <IDocumentSettingAccess.hxx>
#include <IMark.hxx>
#include <IDocumentMarkAccess.hxx>
#include <comphelper/processfactory.hxx>
#include <vcl/pdfextoutdevdata.hxx>
#include <comphelper/string.hxx>
#include <docsh.hxx>
#include <unocrsrhelper.hxx>
#include <textcontentcontrol.hxx>
#include <EnhancedPDFExportHelper.hxx>
#include <com/sun/star/rdf/Statement.hpp>
#include <com/sun/star/rdf/URI.hpp>
#include <com/sun/star/rdf/URIs.hpp>
#include <com/sun/star/rdf/XDocumentMetadataAccess.hpp>
#include <com/sun/star/rdf/XLiteral.hpp>
#include <com/sun/star/text/XTextContent.hpp>
#include <unotxdoc.hxx>

using namespace ::com::sun::star;

namespace {
    //! Calculates and sets optimal repaint offset for the current line
    tools::Long lcl_CalcOptRepaint( SwTextFormatter &rThis,
                                    SwLineLayout const &rCurr,
                                    TextFrameIndex nOldLineEnd,
                                    const std::vector<tools::Long> &rFlyStarts );
    //! Determine if we need to build hidden portions
    bool lcl_BuildHiddenPortion(const SwTextSizeInfo& rInf, TextFrameIndex &rPos);

    // Check whether the two font has the same border
    bool lcl_HasSameBorder(const SwFont& rFirst, const SwFont& rSecond);
}

static void ClearFly( SwTextFormatInfo &rInf )
{
    delete rInf.GetFly();
    rInf.SetFly(nullptr);
}

void SwTextFormatter::CtorInitTextFormatter( SwTextFrame *pNewFrame, SwTextFormatInfo *pNewInf )
{
    CtorInitTextPainter( pNewFrame, pNewInf );
    m_pInf = pNewInf;
    m_pDropFormat = GetInfo().GetDropFormat();
    m_pMulti = nullptr;

    m_bOnceMore = false;
    m_bFlyInContentBase = false;
    m_bTruncLines = false;
    m_nContentEndHyph = 0;
    m_nContentMidHyph = 0;
    m_nLeftScanIdx = TextFrameIndex(COMPLETE_STRING);
    m_nRightScanIdx = TextFrameIndex(0);
    m_pByEndIter.reset();
    m_pFirstOfBorderMerge = nullptr;

    if (m_nStart > TextFrameIndex(GetInfo().GetText().getLength()))
    {
        OSL_ENSURE( false, "+SwTextFormatter::CTOR: bad offset" );
        m_nStart = TextFrameIndex(GetInfo().GetText().getLength());
    }

}

SwTextFormatter::~SwTextFormatter()
{
    // Extremely unlikely, but still possible
    // e.g.: field splits up, widows start to matter
    if( GetInfo().GetRest() )
    {
        delete GetInfo().GetRest();
        GetInfo().SetRest(nullptr);
    }
}

void SwTextFormatter::Insert( SwLineLayout *pLay )
{
    // Insert BEHIND the current element
    if ( m_pCurr )
    {
        pLay->SetNext( m_pCurr->GetNext() );
        m_pCurr->SetNext( pLay );
    }
    else
        m_pCurr = pLay;
}

SwTwips SwTextFormatter::GetFrameRstHeight() const
{
    // We want the rest height relative to the page.
    // If we're in a table, then pFrame->GetUpper() is not the page.

    // GetFrameRstHeight() is being called with Footnote.
    // Wrong: const SwFrame *pUpper = pFrame->GetUpper();
    const SwFrame *pPage = m_pFrame->FindPageFrame();
    const SwTwips nHeight = pPage->getFrameArea().Top()
                          + pPage->getFramePrintArea().Top()
                          + pPage->getFramePrintArea().Height() - Y();
    if( 0 > nHeight )
        return m_pCurr->Height();
    else
        return nHeight;
}

bool SwTextFormatter::ClearIfIsFirstOfBorderMerge(const SwLinePortion* pPortion)
{
    if (pPortion == m_pFirstOfBorderMerge)
    {
        m_pFirstOfBorderMerge = nullptr;
        return true;
    }
    return false;
}

SwLinePortion *SwTextFormatter::Underflow( SwTextFormatInfo &rInf )
{
    // Save values and initialize rInf
    SwLinePortion *pUnderflow = rInf.GetUnderflow();
    if( !pUnderflow )
        return nullptr;

    // We format backwards, i.e. attribute changes can happen the next
    // line again.
    // Can be seen in 8081.sdw, if you enter text in the first line

    TextFrameIndex const nSoftHyphPos = rInf.GetSoftHyphPos();

    // Save flys and set to 0, or else segmentation fault
    // Not ClearFly(rInf) !
    SwFlyPortion *pFly = rInf.GetFly();
    rInf.SetFly( nullptr );

    FeedInf( rInf );
    rInf.SetLast( m_pCurr );
    // pUnderflow does not need to be deleted, because it will drown in the following
    // Truncate()
    rInf.SetUnderflow(nullptr);
    rInf.SetSoftHyphPos( nSoftHyphPos );
    rInf.SetPaintOfst( GetLeftMargin() );

    // We look for the portion with the under-flow position
    SwLinePortion *pPor = m_pCurr->GetFirstPortion();
    if( pPor != pUnderflow )
    {
        // pPrev will be the last portion before pUnderflow,
        // which still has a real width.
        // Exception: SoftHyphPortion must not be forgotten, of course!
        // Although they don't have a width.
        SwLinePortion *pTmpPrev = pPor;
        while( pPor && pPor != pUnderflow )
        {
            if( !pPor->IsKernPortion() &&
                ( pPor->Width() || pPor->IsSoftHyphPortion() ) )
            {
                while( pTmpPrev != pPor )
                {
                    pTmpPrev->Move( rInf );
                    rInf.SetLast( pTmpPrev );
                    pTmpPrev = pTmpPrev->GetNextPortion();
                    OSL_ENSURE( pTmpPrev, "Underflow: losing control!" );
                };
            }
            pPor = pPor->GetNextPortion();
        }
        pPor = pTmpPrev;
        if( pPor && // Skip flys and initials when underflow.
            ( pPor->IsFlyPortion() || pPor->IsDropPortion() ||
              pPor->IsFlyCntPortion() ) )
        {
            pPor->Move( rInf );
            rInf.SetLast( pPor );
            rInf.SetStopUnderflow( true );
            pPor = pUnderflow;
        }
    }

    // What? The under-flow portion is not in the portion chain?
    OSL_ENSURE( pPor, "SwTextFormatter::Underflow: overflow but underflow" );

    // Snapshot
    if ( pPor==rInf.GetLast() )
    {
        // We end up here, if the portion triggering the under-flow
        // spans over the whole line. E.g. if a word spans across
        // multiple lines and flows into a fly in the second line.
        rInf.SetFly( pFly );
        pPor->Truncate();
        return pPor; // Is that enough?
    }
    // End the snapshot

    // X + Width == 0 with SoftHyph > Line?!
    if( !pPor || !(rInf.X() + pPor->Width()) )
    {
        delete pFly;
        return nullptr;
    }

    // Preparing for Format()
    // We need to chip off the chain behind pLast, because we Insert after the Format()
    SeekAndChg( rInf );

    // line width is adjusted, so that pPor does not fit to current
    // line anymore
    rInf.Width( rInf.X() + (pPor->Width() ? pPor->Width() - 1 : 0) );
    rInf.SetLen( pPor->GetLen() );
    rInf.SetFull( false );
    if( pFly )
    {
        // We need to recalculate the FlyPortion due to the following reason:
        // If the base line is lowered by a big font in the middle of the line,
        // causing overlapping with a fly, the FlyPortion has a wrong size/fixed
        // size.
        rInf.SetFly( pFly );
        CalcFlyWidth( rInf );
    }
    rInf.GetLast()->SetNextPortion(nullptr);

    // The SwLineLayout is an exception to this, which splits at the first
    // portion change.
    // Here only the other way around:
    if( rInf.GetLast() == m_pCurr )
    {
        if( pPor->InTextGrp() && !pPor->InExpGrp() )
        {
            const PortionType nOldWhich = m_pCurr->GetWhichPor();
            *static_cast<SwLinePortion*>(m_pCurr) = *pPor;
            m_pCurr->SetNextPortion( pPor->GetNextPortion() );
            m_pCurr->SetWhichPor( nOldWhich );
            pPor->SetNextPortion( nullptr );
            delete pPor;
            pPor = m_pCurr;
        }
    }

    // Make sure that m_pFirstOfBorderMerge does not point to a portion which
    // will be deleted by Truncate() below.
    SwLinePortion* pNext = pPor->GetNextPortion();
    while (pNext)
    {
        if (ClearIfIsFirstOfBorderMerge(pNext))
            break;
        pNext = pNext->GetNextPortion();
    }
    pPor->Truncate();
    SwLinePortion *const pRest( rInf.GetRest() );
    if (pRest && pRest->InFieldGrp() &&
        static_cast<SwFieldPortion*>(pRest)->IsNoLength())
    {
        // HACK: decrement again, so we pick up the suffix in next line!
        m_pByEndIter->PrevAttr();
    }
    delete pRest;
    rInf.SetRest(nullptr);
    return pPor;
}

void SwTextFormatter::InsertPortion( SwTextFormatInfo &rInf,
                                    SwLinePortion *pPor )
{
    SwLinePortion *pLast = nullptr;
    // The new portion is inserted, but everything's different for
    // LineLayout...
    if( pPor == m_pCurr )
    {
        if ( m_pCurr->GetNextPortion() )
        {
            pLast = pPor;
            pPor = m_pCurr->GetNextPortion();
        }

        // i#112181 - Prevent footnote anchor being wrapped to next line
        // without preceding word
        rInf.SetOtherThanFootnoteInside( rInf.IsOtherThanFootnoteInside() || !pPor->IsFootnotePortion() );
    }
    else
    {
        pLast = rInf.GetLast();
        if( pLast->GetNextPortion() )
        {
            while( pLast->GetNextPortion() )
                pLast = pLast->GetNextPortion();
            rInf.SetLast( pLast );
        }
        pLast->Insert( pPor );

        rInf.SetOtherThanFootnoteInside( rInf.IsOtherThanFootnoteInside() || !pPor->IsFootnotePortion() );

        // Adjust maxima
        if( m_pCurr->Height() < pPor->Height() )
            m_pCurr->Height( pPor->Height(), pPor->IsTextPortion() );
        if( m_pCurr->GetAscent() < pPor->GetAscent() )
            m_pCurr->SetAscent( pPor->GetAscent() );
        if( m_pCurr->GetHangingBaseline() < pPor->GetHangingBaseline() )
            m_pCurr->SetHangingBaseline( pPor->GetHangingBaseline() );

        if (GetTextFrame()->GetDoc().getIDocumentSettingAccess().get(DocumentSettingId::MS_WORD_COMP_MIN_LINE_HEIGHT_BY_FLY))
        {
            // For DOCX with compat=14 the only shape in line defines height of the line in spite of used font
            if (pLast->IsFlyCntPortion() && pPor->IsTextPortion() && pPor->GetLen() == TextFrameIndex(0))
            {
                m_pCurr->SetAscent(pLast->GetAscent());
                m_pCurr->Height(pLast->Height());
            }
        }
    }

    // Sometimes chains are constructed (e.g. by hyphenate)
    rInf.SetLast( pPor );
    while( pPor )
    {
        if (!pPor->IsDropPortion())
            MergeCharacterBorder(*pPor, pLast, rInf);

        pPor->Move( rInf );
        rInf.SetLast( pPor );
        pLast = pPor;
        pPor = pPor->GetNextPortion();
    }
}

void SwTextFormatter::BuildPortions( SwTextFormatInfo &rInf )
{
    OSL_ENSURE( rInf.GetText().getLength() < COMPLETE_STRING,
            "SwTextFormatter::BuildPortions: bad text length in info" );

    rInf.ChkNoHyph( CntEndHyph(), CntMidHyph() );

    // First NewTextPortion() decides whether pCurr ends up in pPor.
    // We need to make sure that the font is being set in any case.
    // This is done automatically in CalcAscent.
    rInf.SetLast( m_pCurr );
    rInf.ForcedLeftMargin( 0 );

    OSL_ENSURE( m_pCurr->FindLastPortion() == m_pCurr, "pLast supposed to equal pCurr" );

    if( !m_pCurr->GetAscent() && !m_pCurr->Height() )
        CalcAscent( rInf, m_pCurr );

    SeekAndChg( rInf );

    // Width() is shortened in CalcFlyWidth if we have a FlyPortion
    OSL_ENSURE( !rInf.X() || m_pMulti, "SwTextFormatter::BuildPortion X=0?" );
    CalcFlyWidth( rInf );
    SwFlyPortion *pFly = rInf.GetFly();
    if( pFly )
    {
        if ( 0 < pFly->GetFix() )
            ClearFly( rInf );
        else
            rInf.SetFull(true);
    }

    ::std::optional<TextFrameIndex> oMovedFlyIndex;
    if (SwTextFrame const*const pFollow = GetTextFrame()->GetFollow())
    {
        // flys are always on master!
        if (GetTextFrame()->GetDrawObjs() && pFollow->GetUpper() != GetTextFrame()->GetUpper())
        {
            for (SwAnchoredObject const*const pAnchoredObj : *GetTextFrame()->GetDrawObjs())
            {
                // tdf#146500 try to stop where a fly is anchored in the follow
                // that has recently been moved (presumably by splitting this
                // frame); similar to check in SwFlowFrame::MoveBwd()
                if (pAnchoredObj->RestartLayoutProcess()
                    && !pAnchoredObj->IsTmpConsiderWrapInfluence())
                {
                    SwFormatAnchor const& rAnchor(pAnchoredObj->GetFrameFormat()->GetAnchor());
                    assert(rAnchor.GetAnchorId() == RndStdIds::FLY_AT_CHAR || rAnchor.GetAnchorId() == RndStdIds::FLY_AT_PARA);
                    TextFrameIndex const nAnchor(GetTextFrame()->MapModelToViewPos(*rAnchor.GetContentAnchor()));
                    if (pFollow->GetOffset() <= nAnchor
                        && (pFollow->GetFollow() == nullptr
                            || nAnchor < pFollow->GetFollow()->GetOffset()))
                    {
                        if (!oMovedFlyIndex || nAnchor < *oMovedFlyIndex)
                        {
                            oMovedFlyIndex.emplace(nAnchor);
                        }
                    }
                }
            }
        }
    }

    SwLinePortion *pPor = NewPortion(rInf, oMovedFlyIndex);

    // Asian grid stuff
    SwTextGridItem const*const pGrid(GetGridItem(m_pFrame->FindPageFrame()));

    // tdf#149089: For compatibility with MSO grid layout, do not insert kern portions to
    // align successive portions to the char grid when MS_WORD_COMP_GRID_METRICS is set.
    // See also tdf#161145.
    // tdf#139418: However, in testing, this only seems to apply to horizontal text.
    const bool bUseGridKernPors = GetTextFrame()->IsVertical()
                                  || !GetTextFrame()->GetDoc().getIDocumentSettingAccess().get(
                                      DocumentSettingId::MS_WORD_COMP_GRID_METRICS);
    const bool bHasGrid = pGrid && rInf.SnapToGrid()
                          && SwTextGrid::LinesAndChars == pGrid->GetGridType() && bUseGridKernPors;

    const SwDoc & rDoc = rInf.GetTextFrame()->GetDoc();
    const sal_uInt16 nGridWidth = bHasGrid ? GetGridWidth(*pGrid, rDoc) : 0;

    // used for grid mode only:
    // the pointer is stored, because after formatting of non-asian text,
    // the width of the kerning portion has to be adjusted
    // Inserting a SwKernPortion before a SwTabPortion isn't necessary
    // and will break the SwTabPortion.
    SwKernPortion* pGridKernPortion = nullptr;

    bool bFull = false;
    SwTwips nUnderLineStart = 0;
    rInf.Y( Y() );

    while( pPor && !rInf.IsStop() )
    {
        OSL_ENSURE(rInf.GetLen() < TextFrameIndex(COMPLETE_STRING) &&
                rInf.GetIdx() <= TextFrameIndex(rInf.GetText().getLength()),
                "SwTextFormatter::BuildPortions: bad length in info" );

        // We have to check the script for fields in order to set the
        // correct nActual value for the font.
        if( pPor->InFieldGrp() )
            static_cast<SwFieldPortion*>(pPor)->CheckScript( rInf );

        auto fnRequireKerningAtPosition = [&](TextFrameIndex nIdx)
        {
            if (nIdx == TextFrameIndex{ 0 })
                return false;

            auto nCurrScriptType = m_pScriptInfo->ScriptType(nIdx);
            auto nPrevScriptType = m_pScriptInfo->ScriptType(nIdx - TextFrameIndex{ 1 });
            if (nCurrScriptType == nPrevScriptType)
                return false;

            // tdf#89288: Only insert space between CJK and non-CJK text
            if (nCurrScriptType != css::i18n::ScriptType::ASIAN
                && nPrevScriptType != css::i18n::ScriptType::ASIAN)
                return false;

            // tdf#136663: However, this extra space is only a feature of Chinese and Japanese
            // typesetting. Extra space shouldn't be inserted between Hangul and non-CJK characters.
            const CharClass& rCC = GetAppCharClass();
            auto fnIsHangul = [&](TextFrameIndex nPos)
            {
                auto nType = rCC.getScript(rInf.GetText(), static_cast<sal_Int32>(nPos));
                switch (nType)
                {
                    case css::i18n::UnicodeScript_kHangulJamo:
                    case css::i18n::UnicodeScript_kHangulCompatibilityJamo:
                    case css::i18n::UnicodeScript_kHangulSyllable:
                        return true;

                    default:
                        return false;
                }
            };

            bool bCurrIsHangul = fnIsHangul(nIdx);
            bool bPrevIsHangul = fnIsHangul(nIdx - TextFrameIndex{ 1 });
            return !bPrevIsHangul && !bCurrIsHangul;
        };

        if( ! bHasGrid && rInf.HasScriptSpace() &&
            rInf.GetLast() && rInf.GetLast()->InTextGrp() &&
            rInf.GetLast()->Width() && !rInf.GetLast()->InNumberGrp() )
        {
            tools::Long nLstHeight = rInf.GetFont()->GetHeight();
            bool bAllowBehind = false;
            const CharClass& rCC = GetAppCharClass();

            // are there any punctuation characters on both sides
            // of the kerning portion?
            if ( pPor->InFieldGrp() )
            {
                OUString aAltText;
                if ( static_cast<SwFieldPortion*>(pPor)->GetExpText( rInf, aAltText ) &&
                        !aAltText.isEmpty() )
                {
                    bAllowBehind = rCC.isLetterNumeric( aAltText, 0 );
                }
            }
            else
            {
                const OUString& rText = rInf.GetText();
                sal_Int32 nIdx = sal_Int32(rInf.GetIdx());
                bAllowBehind = nIdx < rText.getLength() && rCC.isLetterNumeric(rText, nIdx);
            }

            const SwLinePortion* pLast = rInf.GetLast();
            if ( bAllowBehind && pLast )
            {
                bool bAllowBefore = false;

                if ( pLast->InFieldGrp() )
                {
                    OUString aAltText;
                    if ( static_cast<const SwFieldPortion*>(pLast)->GetExpText( rInf, aAltText ) &&
                         !aAltText.isEmpty() )
                    {
                        bAllowBefore = rCC.isLetterNumeric( aAltText, aAltText.getLength() - 1 );

                        const SwFont* pTmpFnt = static_cast<const SwFieldPortion*>(pLast)->GetFont();
                        if ( pTmpFnt )
                        {
                            nLstHeight = pTmpFnt->GetHeight();
                        }
                    }
                }
                else if ( rInf.GetIdx() )
                {
                    bAllowBefore = rCC.isLetterNumeric(rInf.GetText(), sal_Int32(rInf.GetIdx()) - 1);
                }

                nLstHeight /= 5;
                // does the kerning portion still fit into the line?
                if (bAllowBefore && fnRequireKerningAtPosition(rInf.GetIdx()) && nLstHeight
                    && rInf.X() + nLstHeight <= rInf.Width() && !pPor->InTabGrp())
                {
                    SwKernPortion* pKrn =
                        new SwKernPortion( *rInf.GetLast(), nLstHeight,
                                           pLast->InFieldGrp() && pPor->InFieldGrp() );

                    // ofz#58550 Direct-leak, pKrn adds itself as the NextPortion
                    // of rInf.GetLast(), but may use CopyLinePortion to add a copy
                    // of itself, which will then be left dangling with the following
                    // SetNextPortion(nullptr)
                    SwLinePortion *pNext = rInf.GetLast()->GetNextPortion();
                    if (pNext != pKrn)
                        delete pNext;

                    rInf.GetLast()->SetNextPortion( nullptr );
                    InsertPortion( rInf, pKrn );
                }
            }
        }
        else if ( bHasGrid && ! pGridKernPortion && ! m_pMulti && ! pPor->InTabGrp() )
        {
            // insert a grid kerning portion
            pGridKernPortion = pPor->IsKernPortion() ?
                               static_cast<SwKernPortion*>(pPor) :
                               new SwKernPortion( *m_pCurr );

            // if we have a new GridKernPortion, we initially calculate
            // its size so that its ends on the grid
            const SwPageFrame* pPageFrame = m_pFrame->FindPageFrame();
            const SwLayoutFrame* pBody = pPageFrame->FindBodyCont();
            SwRectFnSet aRectFnSet(pPageFrame);

            const tools::Long nGridOrigin = pBody ?
                                    aRectFnSet.GetPrtLeft(*pBody) :
                                    aRectFnSet.GetPrtLeft(*pPageFrame);

            SwTwips nStartX = rInf.X() + GetLeftMargin();
            if ( aRectFnSet.IsVert() )
            {
                Point aPoint( nStartX, 0 );
                m_pFrame->SwitchHorizontalToVertical( aPoint );
                nStartX = aPoint.Y();
            }

            const SwTwips nOfst = nStartX - nGridOrigin;
            if ( nOfst )
            {
                const sal_uLong i = ( nOfst > 0 ) ?
                                ( ( nOfst - 1 ) / nGridWidth + 1 ) :
                                0;
                const SwTwips nKernWidth = i * nGridWidth - nOfst;
                const SwTwips nRestWidth = rInf.Width() - rInf.X();

                if ( nKernWidth <= nRestWidth )
                    pGridKernPortion->Width( nKernWidth );
            }

            if ( pGridKernPortion != pPor )
                InsertPortion( rInf, pGridKernPortion );
        }

        if( pPor->IsDropPortion() )
            MergeCharacterBorder(*static_cast<SwDropPortion*>(pPor));

        // the multi-portion has its own format function
        if( pPor->IsMultiPortion() && ( !m_pMulti || m_pMulti->IsBidi() ) )
            bFull = BuildMultiPortion( rInf, *static_cast<SwMultiPortion*>(pPor) );
        else
            bFull = pPor->Format( rInf );

        if( rInf.IsRuby() && !rInf.GetRest() )
            bFull = true;

        // if we are underlined, we store the beginning of this underlined
        // segment for repaint optimization
        if ( LINESTYLE_NONE != m_pFont->GetUnderline() && ! nUnderLineStart )
            nUnderLineStart = GetLeftMargin() + rInf.X();

        if ( pPor->IsFlyPortion() )
            m_pCurr->SetFly( true );
        // some special cases, where we have to take care for the repaint
        // offset:
        // 1. Underlined portions due to special underline feature
        // 2. Right Tab
        // 3. BidiPortions
        // 4. other Multiportions
        // 5. DropCaps
        // 6. Grid Mode
        else if ( ( ! rInf.GetPaintOfst() || nUnderLineStart < rInf.GetPaintOfst() ) &&
                  // 1. Underlined portions
                  nUnderLineStart &&
                     // reformat is at end of an underlined portion and next portion
                     // is not underlined
                  ( ( rInf.GetReformatStart() == rInf.GetIdx() &&
                      LINESTYLE_NONE == m_pFont->GetUnderline()
                    ) ||
                     // reformat is inside portion and portion is underlined
                    ( rInf.GetReformatStart() >= rInf.GetIdx() &&
                      rInf.GetReformatStart() <= rInf.GetIdx() + pPor->GetLen() &&
                      LINESTYLE_NONE != m_pFont->GetUnderline() ) ) )
            rInf.SetPaintOfst( nUnderLineStart );
        else if (  ! rInf.GetPaintOfst() &&
                   // 2. Right Tab
                   ( ( pPor->InTabGrp() && !pPor->IsTabLeftPortion() ) ||
                   // 3. BidiPortions
                     ( pPor->IsMultiPortion() && static_cast<SwMultiPortion*>(pPor)->IsBidi() ) ||
                   // 4. Multi Portion and 5. Drop Caps
                     ( ( pPor->IsDropPortion() || pPor->IsMultiPortion() ) &&
                       rInf.GetReformatStart() >= rInf.GetIdx() &&
                       rInf.GetReformatStart() <= rInf.GetIdx() + pPor->GetLen() )
                   // 6. Grid Mode
                     || ( bHasGrid && SwFontScript::CJK != m_pFont->GetActual() )
                   )
                )
            // we store the beginning of the critical portion as our
            // paint offset
            rInf.SetPaintOfst( GetLeftMargin() + rInf.X() );

        // under one of these conditions we are allowed to delete the
        // start of the underline portion
        if ( IsUnderlineBreak( *pPor, *m_pFont ) )
            nUnderLineStart = 0;

        if( pPor->IsFlyCntPortion() || ( pPor->IsMultiPortion() &&
            static_cast<SwMultiPortion*>(pPor)->HasFlyInContent() ) )
            SetFlyInCntBase();
        // bUnderflow needs to be reset or we wrap again at the next softhyphen
        if ( !bFull )
        {
            rInf.ClrUnderflow();
            if( ! bHasGrid && rInf.HasScriptSpace() && pPor->InTextGrp() &&
                pPor->GetLen() && !pPor->InFieldGrp() )
            {
                // The distance between two different scripts is set
                // to 20% of the fontheight.
                TextFrameIndex const nTmp = rInf.GetIdx() + pPor->GetLen();
                if (nTmp == m_pScriptInfo->NextScriptChg(nTmp - TextFrameIndex(1))
                    && nTmp != TextFrameIndex(rInf.GetText().getLength())
                    && fnRequireKerningAtPosition(nTmp))
                {
                    const SwTwips nDist = rInf.GetFont()->GetHeight()/5;

                    if( nDist )
                    {
                        // we do not want a kerning portion if any end
                        // would be a punctuation character
                        const CharClass& rCC = GetAppCharClass();
                        if (rCC.isLetterNumeric(rInf.GetText(), sal_Int32(nTmp) - 1)
                            && rCC.isLetterNumeric(rInf.GetText(), sal_Int32(nTmp)))
                        {
                            // does the kerning portion still fit into the line?
                            if ( rInf.X() + pPor->Width() + nDist <= rInf.Width() )
                                new SwKernPortion( *pPor, nDist );
                            else
                                bFull = true;
                        }
                    }
                }
            }
        }

        if ( bHasGrid && pPor != pGridKernPortion && ! m_pMulti && ! pPor->InTabGrp() )
        {
            TextFrameIndex const nTmp = rInf.GetIdx() + pPor->GetLen();
            const SwTwips nRestWidth = rInf.Width() - rInf.X() - pPor->Width();

            const SwFontScript nCurrScript = m_pFont->GetActual(); // pScriptInfo->ScriptType( rInf.GetIdx() );
            const SwFontScript nNextScript =
                nTmp >= TextFrameIndex(rInf.GetText().getLength())
                    ? SwFontScript::CJK
                    : m_pScriptInfo->WhichFont(nTmp);

            // snap non-asian text to grid if next portion is ASIAN or
            // there are no more portions in this line
            // be careful when handling an underflow event: the gridkernportion
            // could have been deleted
            if ( nRestWidth > 0 && SwFontScript::CJK != nCurrScript &&
                ! rInf.IsUnderflow() && ( bFull || SwFontScript::CJK == nNextScript ) )
            {
                OSL_ENSURE( pGridKernPortion, "No GridKernPortion available" );

                // calculate size
                SwLinePortion* pTmpPor = pGridKernPortion->GetNextPortion();
                SwTwips nSumWidth = pPor->Width();
                while ( pTmpPor )
                {
                    nSumWidth = nSumWidth + pTmpPor->Width();
                    pTmpPor = pTmpPor->GetNextPortion();
                }

                const SwTwips i = nSumWidth ?
                                 ( nSumWidth - 1 ) / nGridWidth + 1 :
                                 0;
                const SwTwips nTmpWidth = i * nGridWidth;
                const SwTwips nKernWidth = std::min(nTmpWidth - nSumWidth, nRestWidth);
                const SwTwips nKernWidth_1 = pGrid->IsSnapToChars() ?
                    nKernWidth / 2 : 0;

                OSL_ENSURE( nKernWidth <= nRestWidth,
                        "Not enough space left for adjusting non-asian text in grid mode" );
                if (nKernWidth_1)
                {
                    pGridKernPortion->Width( pGridKernPortion->Width() + nKernWidth_1 );
                    rInf.X( rInf.X() + nKernWidth_1 );
                }

                if ( ! bFull && nKernWidth - nKernWidth_1 > 0 )
                    new SwKernPortion( *pPor, static_cast<short>(nKernWidth - nKernWidth_1),
                                       false, true );

                pGridKernPortion = nullptr;
            }
            else if ( pPor->IsMultiPortion() || pPor->InFixMargGrp() ||
                      pPor->IsFlyCntPortion() || pPor->InNumberGrp() ||
                      pPor->InFieldGrp() || nCurrScript != nNextScript )
                // next portion should snap to grid
                pGridKernPortion = nullptr;
        }

        rInf.SetFull( bFull );

        // Restportions from fields with multiple lines don't yet have the right ascent
        if ( !pPor->GetLen() && !pPor->IsFlyPortion()
            && !pPor->IsGrfNumPortion() && ! pPor->InNumberGrp()
            && !pPor->IsMultiPortion() )
            CalcAscent( rInf, pPor );

        InsertPortion( rInf, pPor );
        if (pPor->IsMultiPortion() && (!m_pMulti || m_pMulti->IsBidi()))
        {
            (void) rInf.CheckCurrentPosBookmark(); // bookmark was already created inside MultiPortion!
        }
        pPor = NewPortion(rInf, oMovedFlyIndex);
    }

    if( !rInf.IsStop() )
    {
        // The last right centered, decimal tab
        SwTabPortion *pLastTab = rInf.GetLastTab();
        if( pLastTab )
            pLastTab->FormatEOL( rInf );
        else if( rInf.GetLast() && rInf.LastKernPortion() )
            rInf.GetLast()->FormatEOL( rInf );
    }
    if( m_pCurr->GetNextPortion() && m_pCurr->GetNextPortion()->InNumberGrp()
        && static_cast<SwNumberPortion*>(m_pCurr->GetNextPortion())->IsHide() )
        rInf.SetNumDone( false );

    // Delete fly in any case
    ClearFly( rInf );

    // Reinit the tab overflow flag after the line
    rInf.SetTabOverflow( false );
}

void SwTextFormatter::CalcAdjustLine( SwLineLayout *pCurrent )
{
    if( SvxAdjust::Left != GetAdjust() && !m_pMulti)
    {
        pCurrent->SetFormatAdj(true);
        if( IsFlyInCntBase() )
        {
            CalcAdjLine( pCurrent );
            // For e.g. centered fly we need to switch the RefPoint
            // That's why bAlways = true
            UpdatePos( pCurrent, GetTopLeft(), GetStart(), true );
        }
    }
}

void SwTextFormatter::CalcAscent( SwTextFormatInfo &rInf, SwLinePortion *pPor )
{
    bool bCalc = false;
    if ( pPor->InFieldGrp() && static_cast<SwFieldPortion*>(pPor)->GetFont() )
    {
        // Numbering + InterNetFields can keep an own font, then their size is
        // independent from hard attribute values
        SwFont* pFieldFnt = static_cast<SwFieldPortion*>(pPor)->m_pFont.get();
        SwFontSave aSave( rInf, pFieldFnt );
        pPor->Height( rInf.GetTextHeight() );
        pPor->SetAscent( rInf.GetAscent() );
        bCalc = true;
    }
    // i#89179
    // tab portion representing the list tab of a list label gets the
    // same height and ascent as the corresponding number portion
    else if ( pPor->InTabGrp() && pPor->GetLen() == TextFrameIndex(0) &&
              rInf.GetLast() && rInf.GetLast()->InNumberGrp() &&
              static_cast<const SwNumberPortion*>(rInf.GetLast())->HasFont() )
    {
        const SwLinePortion* pLast = rInf.GetLast();
        pPor->Height( pLast->Height() );
        pPor->SetAscent( pLast->GetAscent() );
    }
    else if (pPor->GetWhichPor() == PortionType::Bookmark
            && rInf.GetIdx() == TextFrameIndex(rInf.GetText().getLength()))
    {
        // bookmark at end of paragraph: *don't* advance iterator, use the
        // current font instead; it's possible that there's a font size on the
        // paragraph and it's overridden on the last line of the paragraph and
        // we don't want to apply it via SwBookmarkPortion and grow the line
        // height (example: n758883.docx)
        SwLinePortion const*const pLast = rInf.GetLast();
        assert(pLast);
        pPor->Height( pLast->Height(), false );
        pPor->SetAscent( pLast->GetAscent() );
    }
    else
    {
        const SwLinePortion *pLast = rInf.GetLast();
        bool bChg = false;

        // In empty lines the attributes are switched on via SeekStart
        const bool bFirstPor = rInf.GetLineStart() == rInf.GetIdx();

        if ( pPor->IsQuoVadisPortion() )
            bChg = SeekStartAndChg( rInf, true );
        else
        {
            if( bFirstPor )
            {
                if( !rInf.GetText().isEmpty() )
                {
                    if ((rInf.GetIdx() != TextFrameIndex(rInf.GetText().getLength())
                            || rInf.GetRest() // field continued - not empty
                            || !GetTextFrame()->GetDoc().getIDocumentSettingAccess().get(
                                DocumentSettingId::APPLY_TEXT_ATTR_TO_EMPTY_LINE_AT_END_OF_PARAGRAPH))
                        && (pPor->GetLen() || !rInf.GetIdx()
                            || (m_pCurr != pLast && !pLast->IsFlyPortion())
                            || !m_pCurr->IsRest())) // instead of !rInf.GetRest()
                    {
                        bChg = SeekAndChg( rInf );
                    }
                    else
                        bChg = SeekAndChgBefore( rInf );
                }
                else if ( m_pMulti )
                    // do not open attributes starting at 0 in empty multi
                    // portions (rotated numbering followed by a footnote
                    // can cause trouble, because the footnote attribute
                    // starts at 0, but if we open it, the attribute handler
                    // cannot handle it.
                    bChg = false;
                else
                    bChg = SeekStartAndChg( rInf );
            }
            else
                bChg = SeekAndChg( rInf );
        }
        if( bChg || bFirstPor || !pPor->GetAscent()
            || !rInf.GetLast()->InTextGrp() )
        {
            pPor->SetHangingBaseline( rInf.GetHangingBaseline() );
            pPor->SetAscent( rInf.GetAscent()  );
            pPor->Height(rInf.GetTextHeight());
            bCalc = true;
        }
        else
        {
            pPor->Height( pLast->Height() );
            pPor->SetAscent( pLast->GetAscent() );
        }
    }

    if( pPor->InTextGrp() && bCalc )
    {
        pPor->SetAscent(pPor->GetAscent() +
            rInf.GetFont()->GetTopBorderSpace());
        pPor->Height(pPor->Height() +
            rInf.GetFont()->GetTopBorderSpace() +
            rInf.GetFont()->GetBottomBorderSpace() );
    }
}

namespace {

class SwMetaPortion : public SwTextPortion
{
    Color m_aShadowColor;
public:
    SwMetaPortion() { SetWhichPor( PortionType::Meta ); }
    virtual void Paint( const SwTextPaintInfo &rInf ) const override;
    void SetShadowColor(const Color& rCol ) { m_aShadowColor = rCol; }
};

/// A content control portion is a text portion that is inside RES_TXTATR_CONTENTCONTROL.
class SwContentControlPortion : public SwTextPortion
{
    SwTextContentControl* m_pTextContentControl;
public:
    SwContentControlPortion(SwTextContentControl* pTextContentControl);
    virtual void Paint(const SwTextPaintInfo& rInf) const override;

    /// Emits a PDF form widget for this portion on success, does nothing on failure.
    bool DescribePDFControl(const SwTextPaintInfo& rInf) const;
};
}

void SwMetaPortion::Paint( const SwTextPaintInfo &rInf ) const
{
    if ( Width() )
    {
        rInf.DrawViewOpt( *this, PortionType::Meta,
                // custom shading (RDF metadata)
                COL_BLACK == m_aShadowColor
                    ? nullptr
                    : &m_aShadowColor );

        SwTextPortion::Paint( rInf );
    }
}

SwContentControlPortion::SwContentControlPortion(SwTextContentControl* pTextContentControl)
    : m_pTextContentControl(pTextContentControl)
{
    SetWhichPor(PortionType::ContentControl);
}

bool SwContentControlPortion::DescribePDFControl(const SwTextPaintInfo& rInf) const
{
    auto pPDFExtOutDevData = dynamic_cast<vcl::PDFExtOutDevData*>(rInf.GetOut()->GetExtOutDevData());
    if (!pPDFExtOutDevData)
    {
        return false;
    }

    if (!pPDFExtOutDevData->GetIsExportFormFields())
    {
        return false;
    }

    if (!m_pTextContentControl)
    {
        return false;
    }

    const SwFormatContentControl& rFormatContentControl = m_pTextContentControl->GetContentControl();
    const std::shared_ptr<SwContentControl>& pContentControl = rFormatContentControl.GetContentControl();
    if (!pContentControl)
    {
        return false;
    }

    SwTextNode* pTextNode = pContentControl->GetTextNode();
    SwDoc& rDoc = pTextNode->GetDoc();
    if (rDoc.IsInHeaderFooter(*pTextNode))
    {
        // Form control in header/footer makes no sense, would allow multiple values for the same
        // control.
        return false;
    }

    // Check if this is the first content control portion of this content control.
    sal_Int32 nStart = m_pTextContentControl->GetStart();
    sal_Int32 nEnd = *m_pTextContentControl->GetEnd();
    TextFrameIndex nViewStart = rInf.GetTextFrame()->MapModelToView(pTextNode, nStart);
    TextFrameIndex nViewEnd = rInf.GetTextFrame()->MapModelToView(pTextNode, nEnd);
    // The content control portion starts 1 char after the starting dummy character.
    if (rInf.GetIdx() != nViewStart + TextFrameIndex(1))
    {
        // Ignore: don't process and also don't emit plain text fallback.
        return true;
    }

    const SwPaM aPam(*pTextNode, nEnd, *pTextNode, nStart);
    static sal_Unicode const aForbidden[] = {
        CH_TXTATR_BREAKWORD,
        0
    };
    const OUString aText = comphelper::string::removeAny(aPam.GetText(), aForbidden);

    std::unique_ptr<vcl::PDFWriter::AnyWidget> pDescriptor;
    switch (pContentControl->GetType())
    {
        case SwContentControlType::RICH_TEXT:
        case SwContentControlType::PLAIN_TEXT:
        {
            pDescriptor = std::make_unique<vcl::PDFWriter::EditWidget>();
            auto pEditWidget = static_cast<vcl::PDFWriter::EditWidget*>(pDescriptor.get());
            pEditWidget->MultiLine = true;
            break;
        }
        case SwContentControlType::CHECKBOX:
        {
            pDescriptor = std::make_unique<vcl::PDFWriter::CheckBoxWidget>();
            auto pCheckBoxWidget = static_cast<vcl::PDFWriter::CheckBoxWidget*>(pDescriptor.get());
            pCheckBoxWidget->Checked = pContentControl->GetChecked();
            // If it's checked already, then leave the default "Yes" OnValue unchanged, so the
            // appropriate appearance is found by PDF readers.
            if (!pCheckBoxWidget->Checked)
            {
                pCheckBoxWidget->OnValue = pContentControl->GetCheckedState();
                pCheckBoxWidget->OffValue = pContentControl->GetUncheckedState();
            }
            break;
        }
        case SwContentControlType::DROP_DOWN_LIST:
        {
            pDescriptor = std::make_unique<vcl::PDFWriter::ListBoxWidget>();
            auto pListWidget = static_cast<vcl::PDFWriter::ListBoxWidget*>(pDescriptor.get());
            pListWidget->DropDown = true;
            sal_Int32 nIndex = 0;
            bool bTextFound = false;
            for (const auto& rItem : pContentControl->GetListItems())
            {
                pListWidget->Entries.push_back(rItem.m_aDisplayText);
                if (rItem.m_aDisplayText == aText)
                {
                    pListWidget->SelectedEntries.push_back(nIndex);
                    bTextFound = true;
                }
                ++nIndex;
            }
            if (!aText.isEmpty() && !bTextFound)
            {
                // The selected entry has to be an index, if there is no index for it, insert one at
                // the start.
                pListWidget->Entries.insert(pListWidget->Entries.begin(), aText);
                pListWidget->SelectedEntries.push_back(0);
            }
            break;
        }
        case SwContentControlType::COMBO_BOX:
        {
            pDescriptor = std::make_unique<vcl::PDFWriter::ComboBoxWidget>();
            auto pComboWidget = static_cast<vcl::PDFWriter::ComboBoxWidget*>(pDescriptor.get());
            for (const auto& rItem : pContentControl->GetListItems())
            {
                pComboWidget->Entries.push_back(rItem.m_aDisplayText);
            }
            break;
        }
        case SwContentControlType::DATE:
        {
            pDescriptor = std::make_unique<vcl::PDFWriter::EditWidget>();
            auto pEditWidget = static_cast<vcl::PDFWriter::EditWidget*>(pDescriptor.get());
            pEditWidget->Format = vcl::PDFWriter::Date;
            // GetDateFormat() uses a syntax that works with SvNumberFormatter::PutEntry(), PDF's
            // AFDate_FormatEx() uses a similar syntax, but uses lowercase characters in case of
            // "Y", "M" and "D" at least.
            pEditWidget->DateFormat = pContentControl->GetDateFormat().toAsciiLowerCase();
            break;
        }
        default:
            break;
    }

    if (!pDescriptor)
    {
        return false;
    }

    bool bShrinkPageForPostIts = pPDFExtOutDevData->GetIsExportNotesInMargin()
                                 && sw_GetPostIts(rDoc.getIDocumentFieldsAccess(), nullptr);
    const SwFont* pFont = rInf.GetFont();
    if (pFont)
    {
        pDescriptor->TextFont = pFont->GetActualFont();
        if (bShrinkPageForPostIts)
        {
            // Page area is scaled down so we have space for comments. Scale down the font height
            // for the content of the widgets, too.
            double fScale = SwEnhancedPDFExportHelper::GetSwRectToPDFRectScale();
            pDescriptor->TextFont.SetFontHeight(pDescriptor->TextFont.GetFontHeight() * fScale);
        }

        // Need to transport the color explicitly, so it's applied to both already filled in and
        // future content.
        pDescriptor->TextColor = pFont->GetColor();
    }

    // Description for accessibility purposes.
    if (!pContentControl->GetAlias().isEmpty())
    {
        pDescriptor->Description = pContentControl->GetAlias();
    }

    // Map the text of the content control to the descriptor's text.
    pDescriptor->Text = aText;

    // Calculate the bounding rectangle of this content control, which can be one or more layout
    // portions in one or more lines.
    SwRect aLocation;
    auto pTextFrame = const_cast<SwTextFrame*>(rInf.GetTextFrame());
    SwTextSizeInfo aInf(pTextFrame);
    SwTextCursor aLine(pTextFrame, &aInf);
    SwRect aStartRect, aEndRect;
    aLine.GetCharRect(&aStartRect, nViewStart);
    aLine.GetCharRect(&aEndRect, nViewEnd);

    // Handling RTL text direction
    if(rInf.GetTextFrame()->IsRightToLeft())
    {
        rInf.GetTextFrame()->SwitchLTRtoRTL( aStartRect );
        rInf.GetTextFrame()->SwitchLTRtoRTL( aEndRect );
    }
    // TODO: handle rInf.GetTextFrame()->IsVertical()

    aLocation = aStartRect;
    aLocation.Union(aEndRect);

    // PDF spec 12.5.2 Annotation Dictionaries says the default border with is 1pt wide, increase
    // the rectangle to compensate for that, otherwise the text will be cut off at the end.
    aLocation.AddTop(-20);
    aLocation.AddBottom(20);
    aLocation.AddLeft(-20);
    aLocation.AddRight(20);

    tools::Rectangle aRect = aLocation.SVRect();
    if (bShrinkPageForPostIts)
    {
        // Map the rectangle of the form widget, similar to how it's done for e.g. hyperlinks.
        const SwPageFrame* pPageFrame = pTextFrame->FindPageFrame();
        if (pPageFrame)
        {
            aRect = SwEnhancedPDFExportHelper::MapSwRectToPDFRect(pPageFrame, aRect);
        }
    }
    pDescriptor->Location = aRect;

    pPDFExtOutDevData->WrapBeginStructureElement(vcl::pdf::StructElement::Form);
    pPDFExtOutDevData->CreateControl(*pDescriptor);
    pPDFExtOutDevData->EndStructureElement();

    return true;
}

void SwContentControlPortion::Paint(const SwTextPaintInfo& rInf) const
{
    if (Width())
    {
        rInf.DrawViewOpt(*this, PortionType::ContentControl);

        if (DescribePDFControl(rInf))
        {
            return;
        }

        SwTextPortion::Paint(rInf);
    }
}

namespace sw::mark {
    OUString ExpandFieldmark(Fieldmark* pBM)
    {
        if (pBM->GetFieldname() == ODF_FORMCHECKBOX)
        {
            ::sw::mark::CheckboxFieldmark const*const pCheckboxFm(
                    dynamic_cast<CheckboxFieldmark const*>(pBM));
            assert(pCheckboxFm);
            return pCheckboxFm->IsChecked()
                    ? u"\u2612"_ustr
                    : u"\u2610"_ustr;
        }
        assert(pBM->GetFieldname() == ODF_FORMDROPDOWN);
        const Fieldmark::parameter_map_t* const pParameters = pBM->GetParameters();
        sal_Int32 nCurrentIdx = 0;
        const Fieldmark::parameter_map_t::const_iterator pResult = pParameters->find(ODF_FORMDROPDOWN_RESULT);
        if(pResult != pParameters->end())
            pResult->second >>= nCurrentIdx;

        const Fieldmark::parameter_map_t::const_iterator pListEntries = pParameters->find(ODF_FORMDROPDOWN_LISTENTRY);
        if (pListEntries != pParameters->end())
        {
            uno::Sequence< OUString > vListEntries;
            pListEntries->second >>= vListEntries;
            if (nCurrentIdx < vListEntries.getLength())
                return vListEntries[nCurrentIdx];
        }

        return vEnSpaces;
    }
}

SwTextPortion *SwTextFormatter::WhichTextPor( SwTextFormatInfo &rInf ) const
{
    SwTextPortion *pPor = nullptr;
    if( GetFnt()->IsTox() )
    {
        pPor = new SwToxPortion;
    }
    else if ( GetFnt()->IsInputField() )
    {
        if (rInf.GetOpt().IsFieldName())
        {
            // assume this is only the *first* portion and follows will be created elsewhere => input field must start at Idx
            assert(rInf.GetText()[sal_Int32(rInf.GetIdx())] == CH_TXT_ATR_INPUTFIELDSTART);
            TextFrameIndex nFieldLen(-1);
            for (TextFrameIndex i = rInf.GetIdx() + TextFrameIndex(1); ; ++i)
            {
                assert(rInf.GetText()[sal_Int32(i)] != CH_TXT_ATR_INPUTFIELDSTART); // can't nest
                if (rInf.GetText()[sal_Int32(i)] == CH_TXT_ATR_INPUTFIELDEND)
                {
                    nFieldLen = i + TextFrameIndex(1) - rInf.GetIdx();
                    break;
                }
            }
            assert(2 <= sal_Int32(nFieldLen));
            pPor = new SwFieldPortion(SwFieldType::GetTypeStr(SwFieldTypesEnum::Input), nullptr, nFieldLen);
        }
        else
        {
            pPor = new SwTextInputFieldPortion();
        }
    }
    else
    {
        if( GetFnt()->IsRef() )
            pPor = new SwRefPortion;
        else if (GetFnt()->IsMeta())
        {
            auto pMetaPor = new SwMetaPortion;

            // set custom LO_EXT_SHADING color, if it exists
            SwTextFrame const*const pFrame(rInf.GetTextFrame());
            SwPosition aPosition(pFrame->MapViewToModelPos(rInf.GetIdx()));
            SwPaM aPam(aPosition);
            uno::Reference<text::XTextContent> const xRet(
                SwUnoCursorHelper::GetNestedTextContent(
                    *aPam.GetPointNode().GetTextNode(), aPosition.GetContentIndex(), false) );
            if (xRet.is())
            {
                const SwDoc & rDoc = rInf.GetTextFrame()->GetDoc();
                static uno::Reference< uno::XComponentContext > xContext(
                    ::comphelper::getProcessComponentContext());

                static uno::Reference< rdf::XURI > xODF_SHADING(
                    rdf::URI::createKnown(xContext, rdf::URIs::LO_EXT_SHADING), uno::UNO_SET_THROW);

                if (const SwDocShell* pShell = rDoc.GetDocShell())
                {
                    rtl::Reference<SwXTextDocument> xDocumentMetadataAccess(pShell->GetBaseModel());

                    const css::uno::Reference<css::rdf::XResource> xSubject(xRet, uno::UNO_QUERY);
                    const uno::Reference<rdf::XRepository> xRepository =
                        xDocumentMetadataAccess->getRDFRepository();
                    const uno::Reference<container::XEnumeration> xEnum(
                        xRepository->getStatements(xSubject, xODF_SHADING, nullptr), uno::UNO_SET_THROW);

                    while (xEnum->hasMoreElements())
                    {
                        rdf::Statement stmt;
                        if (!(xEnum->nextElement() >>= stmt)) {
                            throw uno::RuntimeException();
                        }
                        const uno::Reference<rdf::XLiteral> xObject(stmt.Object, uno::UNO_QUERY);
                        if (!xObject.is()) continue;
                        if (xEnum->hasMoreElements()) {
                            SAL_INFO("sw.uno", "ignoring other odf:shading statements");
                        }
                        Color rColor = Color::STRtoRGB(xObject->getValue());
                        pMetaPor->SetShadowColor(rColor);
                        break;
                    }
                }
            }
            pPor = pMetaPor;
        }
        else if (GetFnt()->IsContentControl())
        {
            SwTextFrame const*const pFrame(rInf.GetTextFrame());
            SwPosition aPosition(pFrame->MapViewToModelPos(rInf.GetIdx()));
            SwTextNode* pTextNode = aPosition.GetNode().GetTextNode();
            SwTextContentControl* pTextContentControl = nullptr;
            if (pTextNode)
            {
                sal_Int32 nIndex = aPosition.GetContentIndex();
                if (SwTextAttr* pAttr = pTextNode->GetTextAttrAt(nIndex, RES_TXTATR_CONTENTCONTROL, ::sw::GetTextAttrMode::Parent))
                {
                    pTextContentControl = static_txtattr_cast<SwTextContentControl*>(pAttr);
                }
            }
            pPor = new SwContentControlPortion(pTextContentControl);
        }
        else
        {
            // Only at the End!
            // If pCurr does not have a width, it can however already have content.
            // E.g. for non-displayable characters

            auto const ch(rInf.GetChar(rInf.GetIdx()));
            SwTextFrame const*const pFrame(rInf.GetTextFrame());
            SwPosition aPosition(pFrame->MapViewToModelPos(rInf.GetIdx()));
            sw::mark::Fieldmark *pBM = pFrame->GetDoc().getIDocumentMarkAccess()->getInnerFieldmarkFor(aPosition);
            if(pBM != nullptr && pBM->GetFieldname( ) == ODF_FORMDATE)
            {
                if (ch == CH_TXT_ATR_FIELDSTART)
                    pPor = new SwFieldFormDatePortion(pBM, true);
                else if (ch == CH_TXT_ATR_FIELDSEP)
                    pPor = new SwFieldMarkPortion(); // it's added in DateFieldmark?
                else if (ch == CH_TXT_ATR_FIELDEND)
                    pPor = new SwFieldFormDatePortion(pBM, false);
            }
            else if (ch == CH_TXT_ATR_FIELDSTART)
                pPor = new SwFieldMarkPortion();
            else if (ch == CH_TXT_ATR_FIELDSEP)
                pPor = new SwFieldMarkPortion();
            else if (ch == CH_TXT_ATR_FIELDEND)
                pPor = new SwFieldMarkPortion();
            else if (ch == CH_TXT_ATR_FORMELEMENT)
            {
                OSL_ENSURE(pBM != nullptr, "Where is my form field bookmark???");
                if (pBM != nullptr)
                {
                    if (pBM->GetFieldname( ) == ODF_FORMCHECKBOX)
                    {
                        pPor = new SwFieldFormCheckboxPortion();
                    }
                    else if (pBM->GetFieldname( ) == ODF_FORMDROPDOWN)
                    {
                        pPor = new SwFieldFormDropDownPortion(pBM, sw::mark::ExpandFieldmark(pBM));
                    }
                    /* we need to check for ODF_FORMTEXT for scenario having FormFields inside FORMTEXT.
                     * Otherwise file will crash on open.
                     */
                    else if (pBM->GetFieldname( ) == ODF_FORMTEXT)
                    {
                        pPor = new SwFieldMarkPortion();
                    }
                }
            }
            if( !pPor )
            {
                if( !rInf.X() && !m_pCurr->GetNextPortion() && !m_pCurr->GetLen()  && !GetFnt()->IsURL() )
                    pPor = m_pCurr;
                else
                {
                    pPor = new SwTextPortion;
                    if (pBM && pBM->GetFieldname() == ODF_FORMTEXT)
                        pPor->SetFieldmarkText(true);
                }
            }
        }
    }
    return pPor;
}

// We calculate the length, the following portion limits are defined:
// 1) Tabs
// 2) Linebreaks
// 3) CH_TXTATR_BREAKWORD / CH_TXTATR_INWORD
// 4) next attribute change

SwTextPortion *SwTextFormatter::NewTextPortion( SwTextFormatInfo &rInf )
{
    // If we're at the line's beginning, we take pCurr
    // If pCurr is not derived from SwTextPortion, we need to duplicate
    Seek( rInf.GetIdx() );
    SwTextPortion *pPor = WhichTextPor( rInf );

    TextFrameIndex nNextChg(rInf.GetText().getLength());

    // until next attribute change:
    const TextFrameIndex nNextAttr = GetNextAttr();
    // until next layout-breaking attribute change:
    const TextFrameIndex nNextLayoutBreakAttr = GetNextLayoutBreakAttr();
    // end of script type:
    const TextFrameIndex nNextScript = m_pScriptInfo->NextScriptChg(rInf.GetIdx());
    // end of direction:
    const TextFrameIndex nNextDir = m_pScriptInfo->NextDirChg(rInf.GetIdx());
    // hidden change (potentially via bookmark):
    const TextFrameIndex nNextHidden = m_pScriptInfo->NextHiddenChg(rInf.GetIdx());
    // bookmarks
    const TextFrameIndex nNextBookmark = m_pScriptInfo->NextBookmark(rInf.GetIdx());

    auto nNextContext = std::min({ nNextChg, nNextLayoutBreakAttr, nNextScript, nNextDir });
    nNextChg = std::min({ nNextChg, nNextAttr, nNextScript, nNextDir, nNextHidden, nNextBookmark });

    // Turbo boost:
    // We assume that font characters are not larger than twice
    // as wide as height.
    // Very crazy: we need to take the ascent into account.

    // Mind the trap! GetSize() contains the wished-for height, the real height
    // is only known in CalcAscent!

    // The ratio is even crazier: a blank in Times New Roman has an ascent of
    // 182, a height of 200 and a width of 53!
    // It follows that a line with a lot of blanks is processed incorrectly.
    // Therefore we increase from factor 2 to 8 (due to negative kerning).

    pPor->SetLen(TextFrameIndex(1));
    CalcAscent( rInf, pPor );

    const SwFont* pTmpFnt = rInf.GetFont();
    auto nCharWidthGuess = std::min(pTmpFnt->GetHeight(), pPor->GetAscent()) / 8;
    if (!nCharWidthGuess)
        nCharWidthGuess = 1;
    auto nExpect = rInf.GetIdx() + TextFrameIndex(rInf.GetLineWidth() / nCharWidthGuess);
    if (nExpect > rInf.GetIdx())
    {
        nNextChg = std::min(nNextChg, nExpect);
        nNextContext = std::min(nNextContext, nExpect);
    }

    // we keep an invariant during method calls:
    // there are no portion ending characters like hard spaces
    // or tabs in [ nLeftScanIdx, nRightScanIdx ]
    if ( m_nLeftScanIdx <= rInf.GetIdx() && rInf.GetIdx() <= m_nRightScanIdx )
    {
        if ( nNextChg > m_nRightScanIdx )
            nNextChg = m_nRightScanIdx =
                rInf.ScanPortionEnd( m_nRightScanIdx, nNextChg );
    }
    else
    {
        m_nLeftScanIdx = rInf.GetIdx();
        nNextChg = m_nRightScanIdx =
                rInf.ScanPortionEnd( rInf.GetIdx(), nNextChg );
    }

    pPor->SetLen( nNextChg - rInf.GetIdx() );
    rInf.SetLen( pPor->GetLen() );

    // Generate a new layout context for the text portion. This is necessary
    // for the first text portion in a paragraph, or for any successive
    // portions that are outside of the bounds of the previous context.
    if (!rInf.GetLayoutContext().has_value()
        || rInf.GetLayoutContext()->m_nBegin < rInf.GetLineStart().get()
        || rInf.GetLayoutContext()->m_nEnd < nNextChg.get())
    {
        // The layout context must terminate at special characters
        sal_Int32 nEnd = rInf.GetIdx().get();
        for (; nEnd < nNextContext.get(); ++nEnd)
        {
            bool bAtEnd = false;
            switch (rInf.GetText()[nEnd])
            {
                case CH_TXTATR_BREAKWORD:
                case CH_TXTATR_INWORD:
                case CH_TXTATR_TAB:
                case CH_TXTATR_NEWLINE:
                case CH_TXT_ATR_INPUTFIELDSTART:
                case CH_TXT_ATR_INPUTFIELDEND:
                case CH_TXT_ATR_FORMELEMENT:
                case CH_TXT_ATR_FIELDSTART:
                case CH_TXT_ATR_FIELDSEP:
                case CH_TXT_ATR_FIELDEND:
                case CHAR_SOFTHYPHEN:
                    bAtEnd = true;
                    break;

                default:
                    break;
            }

            if (bAtEnd)
            {
                break;
            }
        }

        std::optional<SwLinePortionLayoutContext> nNewContext;
        if (rInf.GetIdx().get() != nEnd)
        {
            nNewContext = SwLinePortionLayoutContext{ rInf.GetIdx().get(), nEnd };
        }

        rInf.SetLayoutContext(nNewContext);
    }

    pPor->SetLayoutContext(rInf.GetLayoutContext());

    return pPor;
}

// first portions have no length
SwLinePortion *SwTextFormatter::WhichFirstPortion(SwTextFormatInfo &rInf)
{
    SwLinePortion *pPor = nullptr;

    if( rInf.GetRest() )
    {
        // Tabs and fields
        if( '\0' != rInf.GetHookChar() )
            return nullptr;

        pPor = rInf.GetRest();
        if( pPor->IsErgoSumPortion() )
            rInf.SetErgoDone(true);
        else
            if( pPor->IsFootnoteNumPortion() )
                rInf.SetFootnoteDone(true);
            else
                if( pPor->InNumberGrp() )
                    rInf.SetNumDone(true);

        rInf.SetRest(nullptr);
        m_pCurr->SetRest( true );
        return pPor;
    }

    // We can stand in the follow, it's crucial that
    // pFrame->GetOffset() == 0!
    if( rInf.GetIdx() )
    {
        // We now too can elongate FootnotePortions and ErgoSumPortions

        // 1. The ErgoSumTexts
        if( !rInf.IsErgoDone() )
        {
            if( m_pFrame->IsInFootnote() && !m_pFrame->GetIndPrev() )
                pPor = NewErgoSumPortion( rInf );
            rInf.SetErgoDone( true );
        }

        // 2. Arrow portions
        if( !pPor && !rInf.IsArrowDone() )
        {
            if( m_pFrame->GetOffset() && !m_pFrame->IsFollow() &&
                rInf.GetIdx() == m_pFrame->GetOffset() )
                pPor = new SwArrowPortion( *m_pCurr );
            rInf.SetArrowDone( true );
        }

        // 3. Kerning portions at beginning of line in grid mode
        if ( ! pPor && ! m_pCurr->GetNextPortion() )
        {
            SwTextGridItem const*const pGrid(
                    GetGridItem(GetTextFrame()->FindPageFrame()));
            if ( pGrid )
                pPor = new SwKernPortion( *m_pCurr );
        }

        // 4. The line rests (multiline fields)
        if( !pPor )
        {
            pPor = rInf.GetRest();
            // Only for pPor of course
            if( pPor )
            {
                m_pCurr->SetRest( true );
                rInf.SetRest(nullptr);
            }
        }
    }
    else
    {
        // 5. The foot note count
        if( !rInf.IsFootnoteDone() )
        {
            OSL_ENSURE( ( ! rInf.IsMulti() && ! m_pMulti ) || m_pMulti->HasRotation(),
                     "Rotated number portion trouble" );

            const bool bFootnoteNum = m_pFrame->IsFootnoteNumFrame();
            rInf.GetParaPortion()->SetFootnoteNum( bFootnoteNum );
            if( bFootnoteNum )
                pPor = NewFootnoteNumPortion( rInf );
            rInf.SetFootnoteDone( true );
        }

        // 6. The ErgoSumTexts of course also exist in the TextMaster,
        // it's crucial whether the SwFootnoteFrame is aFollow
        if( !rInf.IsErgoDone() && !pPor && ! rInf.IsMulti() )
        {
            if( m_pFrame->IsInFootnote() && !m_pFrame->GetIndPrev() )
                pPor = NewErgoSumPortion( rInf );
            rInf.SetErgoDone( true );
        }

        // 7. The numbering
        if( !rInf.IsNumDone() && !pPor )
        {
            OSL_ENSURE( ( ! rInf.IsMulti() && ! m_pMulti ) || m_pMulti->HasRotation(),
                     "Rotated number portion trouble" );

            // If we're in the follow, then of course not
            if (GetTextFrame()->GetTextNodeForParaProps()->GetNumRule())
                pPor = NewNumberPortion( rInf );
            rInf.SetNumDone( true );
        }
        // 8. The DropCaps
        if( !pPor && GetDropFormat() && ! rInf.IsMulti() )
            pPor = NewDropPortion( rInf );

        // 9. Kerning portions at beginning of line in grid mode
        if ( !pPor && !m_pCurr->GetNextPortion() )
        {
            SwTextGridItem const*const pGrid(
                    GetGridItem(GetTextFrame()->FindPageFrame()));
            if ( pGrid )
                pPor = new SwKernPortion( *m_pCurr );
        }
    }

    // 10. Decimal tab portion at the beginning of each line in table cells
    if ( !pPor && !m_pCurr->GetNextPortion() &&
             GetTextFrame()->IsInTab() &&
             GetTextFrame()->GetDoc().getIDocumentSettingAccess().get(DocumentSettingId::TAB_COMPAT))
    {
        pPor = NewTabPortion( rInf, true );
    }

    // 11. suffix of meta-field
    if (!pPor)
    {
        pPor = TryNewNoLengthPortion(rInf);
    }

    // 12. bookmarks
    // check this *last* so that BuildMultiPortion() can find it!
    if (!pPor && rInf.CheckCurrentPosBookmark())
    {
        const auto bookmark = m_pScriptInfo->GetBookmarks(rInf.GetIdx());
        if (!bookmark.empty())
        {
            // only for character width, maybe replaced with ] later
            sal_Unicode mark = '[';

            pPor = new SwBookmarkPortion(mark, bookmark);
        }
    }

    return pPor;
}

static bool lcl_OldFieldRest( const SwLineLayout* pCurr )
{
    if( !pCurr->GetNext() )
        return false;
    const SwLinePortion *pPor = pCurr->GetNext()->GetNextPortion();
    bool bRet = false;
    while( pPor && !bRet )
    {
        bRet = (pPor->InFieldGrp() && static_cast<const SwFieldPortion*>(pPor)->IsFollow()) ||
            (pPor->IsMultiPortion() && static_cast<const SwMultiPortion*>(pPor)->IsFollowField());
        if( !pPor->GetLen() )
            break;
        pPor = pPor->GetNextPortion();
    }
    return bRet;
}

/* NewPortion sets rInf.nLen
 * A SwTextPortion is limited by a tab, break, txtatr or attr change
 * We can have three cases:
 * 1) The line is full and the wrap was not emulated
 *    -> return 0;
 * 2) The line is full and a wrap was emulated
 *    -> Reset width and return new FlyPortion
 * 3) We need to construct a new portion
 *    -> CalcFlyWidth emulates the width and return portion, if needed
 */

SwLinePortion *SwTextFormatter::NewPortion(SwTextFormatInfo &rInf,
--> --------------------

--> maximum size reached

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