objectformattertxtfrm.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include "objectformattertxtfrm.hxx"
#include <sortedobjs.hxx>
#include <rootfrm.hxx>
#include <anchoredobject.hxx>
#include <txtfrm.hxx>
#include <pagefrm.hxx>
#include <rowfrm.hxx>
#include <layouter.hxx>
#include <fmtanchr.hxx>
#include <fmtwrapinfluenceonobjpos.hxx>
#include <fmtfollowtextflow.hxx>
#include <layact.hxx>
#include <flyfrm.hxx>
#include <ftnfrm.hxx>
#include <osl/diagnose.h>

using namespace ::com::sun::star;

namespace {

// little helper class to forbid follow formatting for the given text frame
class SwForbidFollowFormat
{
private:
    SwTextFrame& mrTextFrame;
    const bool bOldFollowFormatAllowed;

public:
    explicit SwForbidFollowFormat( SwTextFrame& _rTextFrame )
        : mrTextFrame( _rTextFrame ),
          bOldFollowFormatAllowed( _rTextFrame.FollowFormatAllowed() )
    {
        mrTextFrame.ForbidFollowFormat();
    }

    ~SwForbidFollowFormat()
    {
        if ( bOldFollowFormatAllowed )
        {
            mrTextFrame.AllowFollowFormat();
        }
    }
};

}

SwObjectFormatterTextFrame::SwObjectFormatterTextFrame( SwTextFrame& _rAnchorTextFrame,
                                                  const SwPageFrame& _rPageFrame,
                                                  SwTextFrame* _pMasterAnchorTextFrame,
                                                  SwLayAction* _pLayAction )
    : SwObjectFormatter( _rPageFrame, _pLayAction, true ),
      mrAnchorTextFrame( _rAnchorTextFrame ),
      mpMasterAnchorTextFrame( _pMasterAnchorTextFrame )
{
}

SwObjectFormatterTextFrame::~SwObjectFormatterTextFrame()
{
}

std::unique_ptr<SwObjectFormatterTextFrame> SwObjectFormatterTextFrame::CreateObjFormatter(
                                                SwTextFrame& _rAnchorTextFrame,
                                                const SwPageFrame& _rPageFrame,
                                                SwLayAction* _pLayAction )
{
    std::unique_ptr<SwObjectFormatterTextFrame> pObjFormatter;

    // determine 'master' of <_rAnchorTextFrame>, if anchor frame is a follow text frame.
    SwTextFrame* pMasterOfAnchorFrame = nullptr;
    if ( _rAnchorTextFrame.IsFollow() )
    {
        pMasterOfAnchorFrame = _rAnchorTextFrame.FindMaster();
        while ( pMasterOfAnchorFrame && pMasterOfAnchorFrame->IsFollow() )
        {
            pMasterOfAnchorFrame = pMasterOfAnchorFrame->FindMaster();
        }
    }

    // create object formatter, if floating screen objects are registered
    // at anchor frame (or at 'master' anchor frame)
    if ( _rAnchorTextFrame.GetDrawObjs() ||
         ( pMasterOfAnchorFrame && pMasterOfAnchorFrame->GetDrawObjs() ) )
    {
        pObjFormatter.reset(
            new SwObjectFormatterTextFrame( _rAnchorTextFrame, _rPageFrame,
                                         pMasterOfAnchorFrame, _pLayAction ));
    }

    return pObjFormatter;
}

SwFrame& SwObjectFormatterTextFrame::GetAnchorFrame()
{
    return mrAnchorTextFrame;
}

// #i40147# - add parameter <_bCheckForMovedFwd>.
bool SwObjectFormatterTextFrame::DoFormatObj( SwAnchoredObject& _rAnchoredObj,
                                           const bool _bCheckForMovedFwd )
{
    // consider, if the layout action has to be
    // restarted due to a delete of a page frame.
    if ( GetLayAction() && GetLayAction()->IsAgain() )
    {
        return false;
    }

    bool bSuccess( true );

    if ( _rAnchoredObj.IsFormatPossible() )
    {
        _rAnchoredObj.SetRestartLayoutProcess( false );

        FormatObj_( _rAnchoredObj );
        // consider, if the layout action has to be
        // restarted due to a delete of a page frame.
        if ( GetLayAction() && GetLayAction()->IsAgain() )
        {
            return false;
        }

        // check, if layout process has to be restarted.
        // if yes, perform needed invalidations.

        // no restart of layout process,
        // if anchored object is anchored inside a Writer fly frame,
        // its position is already locked, and it follows the text flow.
        const bool bRestart =
                _rAnchoredObj.RestartLayoutProcess() &&
                !( _rAnchoredObj.PositionLocked() &&
                   _rAnchoredObj.GetAnchorFrame()->IsInFly() &&
                   _rAnchoredObj.GetFrameFormat().GetFollowTextFlow().GetValue() );
        if ( bRestart )
        {
            bSuccess = false;
            InvalidatePrevObjs( _rAnchoredObj );
            InvalidateFollowObjs( _rAnchoredObj );
        }

        // format anchor text frame, if wrapping style influence of the object
        // has to be considered and it's <NONE_SUCCESSIVE_POSITIONED>
        // #i3317# - consider also anchored objects, whose
        // wrapping style influence is temporarily considered.
        // #i40147# - consider also anchored objects, for
        // whose the check of a moved forward anchor frame is requested.
        // revise decision made for i3317:
        // anchored objects, whose wrapping style influence is temporarily considered,
        // have to be considered in method <SwObjectFormatterTextFrame::DoFormatObjs()>
        if ( bSuccess &&
             _rAnchoredObj.ConsiderObjWrapInfluenceOnObjPos() &&
             ( _bCheckForMovedFwd ||
               _rAnchoredObj.GetFrameFormat().GetWrapInfluenceOnObjPos().
                    // #i35017# - handle ITERATIVE as ONCE_SUCCESSIVE
                    GetWrapInfluenceOnObjPos( true ) ==
                        // #i35017# - constant name has changed
                        text::WrapInfluenceOnPosition::ONCE_SUCCESSIVE ) )
        {
            // #i26945# - check conditions for move forward of
            // anchor text frame
            // determine, if anchor text frame has previous frame
            const bool bDoesAnchorHadPrev = ( mrAnchorTextFrame.GetIndPrev() != nullptr );

            // #i40141# - use new method - it also formats the
            // section the anchor frame is in.
            FormatAnchorFrameForCheckMoveFwd();

            // #i35911#
            if ( _rAnchoredObj.HasClearedEnvironment() )
            {
                _rAnchoredObj.SetClearedEnvironment( true );
                // #i44049# - consider, that anchor frame
                // could already been marked to move forward.
                SwPageFrame* pAnchorPageFrame( mrAnchorTextFrame.FindPageFrame() );
                if ( pAnchorPageFrame != _rAnchoredObj.GetPageFrame() )
                {
                    bool bInsert( true );
                    sal_uInt32 nToPageNum( 0 );
                    const SwDoc& rDoc = *(GetPageFrame().GetFormat()->GetDoc());
                    if ( SwLayouter::FrameMovedFwdByObjPos(
                                            rDoc, mrAnchorTextFrame, nToPageNum ) )
                    {
                        if ( nToPageNum < pAnchorPageFrame->GetPhyPageNum() )
                            SwLayouter::RemoveMovedFwdFrame( rDoc, mrAnchorTextFrame );
                        else
                            bInsert = false;
                    }
                    if ( bInsert )
                    {
                        SwLayouter::InsertMovedFwdFrame( rDoc, mrAnchorTextFrame,
                                                       pAnchorPageFrame->GetPhyPageNum() );
                        mrAnchorTextFrame.InvalidatePos();
                        bSuccess = false;
                        InvalidatePrevObjs( _rAnchoredObj );
                        InvalidateFollowObjs( _rAnchoredObj );
                    }
                    else
                    {
                        OSL_FAIL( "<SwObjectFormatterTextFrame::DoFormatObj(..)> - anchor frame not marked to move forward" );
                    }
                }
            }
            else if ( !mrAnchorTextFrame.IsFollow() && bDoesAnchorHadPrev )
            {
                // index of anchored object in collection of page numbers and
                // anchor types
                sal_uInt32 nIdx( CountOfCollected() );
                OSL_ENSURE( nIdx > 0,
                        "<SwObjectFormatterTextFrame::DoFormatObj(..)> - anchored object not collected!?" );
                --nIdx;

                sal_uInt32 nToPageNum( 0 );
                // #i43913#
                bool bDummy( false );
                bool bPageHasFlysAnchoredBelowThis(false);
                // see how SwObjectFormatter::FormatObjsAtFrame_() checks
                // "pPageFrameOfAnchor == &mrPageFrame" - only caller relevant for
                // this subclass
                assert(GetPageFrame().GetPhyPageNum() == GetPgNumOfCollected(nIdx));
                if ( SwObjectFormatterTextFrame::CheckMovedFwdCondition( *GetCollectedObj( nIdx ),
                                              GetPageFrame(),
                                              IsCollectedAnchoredAtMaster( nIdx ),
                                              nToPageNum, bDummy,
                                              bPageHasFlysAnchoredBelowThis))
                {
                    // #i49987# - consider, that anchor frame
                    // could already been marked to move forward.
                    bool bInsert( true );
                    sal_uInt32 nMovedFwdToPageNum( 0 );
                    const SwDoc& rDoc = *(GetPageFrame().GetFormat()->GetDoc());
                    if ( SwLayouter::FrameMovedFwdByObjPos(
                                            rDoc, mrAnchorTextFrame, nMovedFwdToPageNum ) )
                    {
                        if ( nMovedFwdToPageNum < nToPageNum )
                        {
                            if (!bPageHasFlysAnchoredBelowThis)
                            {
                                SwLayouter::RemoveMovedFwdFrame(rDoc, mrAnchorTextFrame);
                            }
                        }
                        else
                            bInsert = false;
                    }
                    if ( bInsert )
                    {
                        // Indicate that anchor text frame has to move forward and
                        // invalidate its position to force a re-format.
                        if (!bPageHasFlysAnchoredBelowThis)
                        {
                            SwLayouter::InsertMovedFwdFrame(rDoc,
                                    mrAnchorTextFrame, nToPageNum);
                        }
                        mrAnchorTextFrame.InvalidatePos();

                        // Indicate restart of the layout process
                        bSuccess = false;

                        // If needed, invalidate previous objects anchored at same anchor
                        // text frame.
                        InvalidatePrevObjs( _rAnchoredObj );

                        // Invalidate object and following objects for the restart of the
                        // layout process
                        InvalidateFollowObjs( _rAnchoredObj );
                    }
                    else
                    {
                        OSL_FAIL( "<SwObjectFormatterTextFrame::DoFormatObj(..)> - anchor frame not marked to move forward" );
                    }
                }
            }
            // i40155# - mark anchor frame not to wrap around
            // objects under the condition, that its follow contains all its text.
            else if ( !mrAnchorTextFrame.IsFollow() &&
                      mrAnchorTextFrame.GetFollow() &&
                      mrAnchorTextFrame.GetFollow()->GetOffset() == TextFrameIndex(0))
            {
                SwLayouter::RemoveMovedFwdFrame(
                                *(mrAnchorTextFrame.FindPageFrame()->GetFormat()->GetDoc()),
                                mrAnchorTextFrame );
            }
        }
    }

    return bSuccess;
}

bool SwObjectFormatterTextFrame::DoFormatObjs()
{
    if ( !mrAnchorTextFrame.isFrameAreaDefinitionValid() )
    {
        if ( GetLayAction() &&
             mrAnchorTextFrame.FindPageFrame() != &GetPageFrame() )
        {
            // notify layout action, thus is can restart the layout process on
            // a previous page.
            GetLayAction()->SetAgain(true);
        }
        else
        {
            // the anchor text frame has to be valid, thus assert.
            OSL_FAIL( "<SwObjectFormatterTextFrame::DoFormatObjs()> called for invalidate anchor text frame." );
        }

        return false;
    }

    bool bSuccess( true );

    if ( mrAnchorTextFrame.IsFollow() )
    {
        // Only floating screen objects anchored as-character are directly
        // registered at a follow text frame. The other floating screen objects
        // are registered at the 'master' anchor text frame.
        // Thus, format the other floating screen objects through the 'master'
        // anchor text frame
        OSL_ENSURE( mpMasterAnchorTextFrame,
                "SwObjectFormatterTextFrame::DoFormatObjs() - missing 'master' anchor text frame" );
        bSuccess = FormatObjsAtFrame_( mpMasterAnchorTextFrame );

        if ( bSuccess )
        {
            // format of as-character anchored floating screen objects - no failure
            // expected on the format of these objects.
            bSuccess = FormatObjsAtFrame_();
        }
    }
    else
    {
        bSuccess = FormatObjsAtFrame_();
    }

    // consider anchored objects, whose wrapping style influence are temporarily
    // considered.
    if ( bSuccess &&
         ( ConsiderWrapOnObjPos() ||
           ( !mrAnchorTextFrame.IsFollow() &&
             AtLeastOneObjIsTmpConsiderWrapInfluence() ) ) )
    {
        const bool bDoesAnchorHadPrev = ( mrAnchorTextFrame.GetIndPrev() != nullptr );

        // Format anchor text frame after its objects are formatted.
        // Note: The format of the anchor frame also formats the invalid
        //       previous frames of the anchor frame. The format of the previous
        //       frames is needed to get a correct result of format of the
        //       anchor frame for the following check for moved forward anchors
        // #i40141# - use new method - it also formats the
        // section the anchor frame is in.
        FormatAnchorFrameForCheckMoveFwd();

        sal_uInt32 nToPageNum( 0 );
        // #i43913#
        bool bInFollow( false );
        bool bPageHasFlysAnchoredBelowThis(false);
        SwAnchoredObject* pObj = nullptr;
        if ( !mrAnchorTextFrame.IsFollow() )
        {
            pObj = GetFirstObjWithMovedFwdAnchor(
                    // #i35017# - constant name has changed
                    text::WrapInfluenceOnPosition::ONCE_CONCURRENT,
                    nToPageNum, bInFollow, bPageHasFlysAnchoredBelowThis );
        }
        // #i35911#
        if ( pObj && pObj->HasClearedEnvironment() )
        {
            pObj->SetClearedEnvironment( true );
            // #i44049# - consider, that anchor frame
            // could already been marked to move forward.
            SwPageFrame* pAnchorPageFrame( mrAnchorTextFrame.FindPageFrame() );
            // #i43913# - consider, that anchor frame
            // is a follow or is in a follow row, which will move forward.
            if ( pAnchorPageFrame != pObj->GetPageFrame() ||
                 bInFollow )
            {
                bool bInsert( true );
                sal_uInt32 nTmpToPageNum( 0 );
                const SwDoc& rDoc = *(GetPageFrame().GetFormat()->GetDoc());
                if ( SwLayouter::FrameMovedFwdByObjPos(
                                        rDoc, mrAnchorTextFrame, nTmpToPageNum ) )
                {
                    if ( nTmpToPageNum < pAnchorPageFrame->GetPhyPageNum() )
                    {
                        if (!bPageHasFlysAnchoredBelowThis)
                        {
                            SwLayouter::RemoveMovedFwdFrame(rDoc, mrAnchorTextFrame);
                        }
                    }
                    else
                        bInsert = false;
                }
                if ( bInsert )
                {
                    if (!bPageHasFlysAnchoredBelowThis)
                    {
                        SwLayouter::InsertMovedFwdFrame(rDoc, mrAnchorTextFrame,
                               pAnchorPageFrame->GetPhyPageNum());
                    }
                    mrAnchorTextFrame.InvalidatePos();
                    bSuccess = false;
                    InvalidatePrevObjs( *pObj );
                    InvalidateFollowObjs( *pObj );
                }
                else
                {
                    OSL_FAIL( "<SwObjectFormatterTextFrame::DoFormatObjs(..)> - anchor frame not marked to move forward" );
                }
            }
        }
        else if ( pObj && bDoesAnchorHadPrev )
        {
            // Object found, whose anchor is moved forward

            // #i49987# - consider, that anchor frame
            // could already been marked to move forward.
            bool bInsert( true );
            sal_uInt32 nMovedFwdToPageNum( 0 );
            const SwDoc& rDoc = *(GetPageFrame().GetFormat()->GetDoc());
            if ( SwLayouter::FrameMovedFwdByObjPos(
                                    rDoc, mrAnchorTextFrame, nMovedFwdToPageNum ) )
            {
                if ( nMovedFwdToPageNum < nToPageNum )
                    SwLayouter::RemoveMovedFwdFrame( rDoc, mrAnchorTextFrame );
                else
                    bInsert = false;
            }
            if ( bInsert )
            {
                // Indicate that anchor text frame has to move forward and
                // invalidate its position to force a re-format.
                SwLayouter::InsertMovedFwdFrame( rDoc, mrAnchorTextFrame, nToPageNum );
                mrAnchorTextFrame.InvalidatePos();

                // Indicate restart of the layout process
                bSuccess = false;

                // If needed, invalidate previous objects anchored at same anchor
                // text frame.
                InvalidatePrevObjs( *pObj );

                // Invalidate object and following objects for the restart of the
                // layout process
                InvalidateFollowObjs( *pObj );
            }
            else
            {
                OSL_FAIL( "<SwObjectFormatterTextFrame::DoFormatObjs(..)> - anchor frame not marked to move forward" );
            }
        }
        // #i40155# - mark anchor frame not to wrap around
        // objects under the condition, that its follow contains all its text.
        else if ( !mrAnchorTextFrame.IsFollow() &&
                  mrAnchorTextFrame.GetFollow() &&
                  mrAnchorTextFrame.GetFollow()->GetOffset() == TextFrameIndex(0))
        {
            SwLayouter::RemoveMovedFwdFrame(
                            *(mrAnchorTextFrame.FindPageFrame()->GetFormat()->GetDoc()),
                            mrAnchorTextFrame );
        }
    }

    return bSuccess;
}

void SwObjectFormatterTextFrame::InvalidatePrevObjs( SwAnchoredObject& _rAnchoredObj )
{
    // invalidate all previous objects, whose wrapping influence on the object
    // positioning is <NONE_CONCURRENT_POSITIONED>.
    // Note: list of objects at anchor frame is sorted by this property.
    if ( _rAnchoredObj.GetFrameFormat().GetWrapInfluenceOnObjPos().
                // #i35017# - handle ITERATIVE as ONCE_SUCCESSIVE
                GetWrapInfluenceOnObjPos( true ) !=
                            // #i35017# - constant name has changed
                            text::WrapInfluenceOnPosition::ONCE_CONCURRENT )
        return;

    const SwSortedObjs* pObjs = GetAnchorFrame().GetDrawObjs();
    if ( !pObjs )
        return;

    // determine start index
    size_t i = pObjs->ListPosOf( _rAnchoredObj );
    while (i > 0)
    {
        --i;
        SwAnchoredObject* pAnchoredObj = (*pObjs)[i];
        if ( pAnchoredObj->GetFrameFormat().GetWrapInfluenceOnObjPos().
                // #i35017# - handle ITERATIVE as ONCE_SUCCESSIVE
                GetWrapInfluenceOnObjPos( true ) ==
                    // #i35017# - constant name has changed
                    text::WrapInfluenceOnPosition::ONCE_CONCURRENT )
        {
            pAnchoredObj->InvalidateObjPosForConsiderWrapInfluence();
        }
    }
}

void SwObjectFormatterTextFrame::InvalidateFollowObjs( SwAnchoredObject& _rAnchoredObj )
{
    _rAnchoredObj.InvalidateObjPosForConsiderWrapInfluence();

    const SwSortedObjs* pObjs = GetPageFrame().GetSortedObjs();
    if ( pObjs )
    {
        // determine start index
        for ( size_t i = pObjs->ListPosOf( _rAnchoredObj ) + 1; i < pObjs->size(); ++i )
        {
            SwAnchoredObject* pAnchoredObj = (*pObjs)[i];
            pAnchoredObj->InvalidateObjPosForConsiderWrapInfluence();
        }
    }
}

SwAnchoredObject* SwObjectFormatterTextFrame::GetFirstObjWithMovedFwdAnchor(
                                    const sal_Int16 _nWrapInfluenceOnPosition,
                                    sal_uInt32& _noToPageNum,
                                    bool& _boInFollow,
                                    bool& o_rbPageHasFlysAnchoredBelowThis)
{
    // #i35017# - constant names have changed
    OSL_ENSURE( _nWrapInfluenceOnPosition == text::WrapInfluenceOnPosition::ONCE_SUCCESSIVE ||
            _nWrapInfluenceOnPosition == text::WrapInfluenceOnPosition::ONCE_CONCURRENT,
            "<SwObjectFormatterTextFrame::GetFirstObjWithMovedFwdAnchor(..)> - invalid value for parameter <_nWrapInfluenceOnPosition>" );

    SwAnchoredObject* pRetAnchoredObj = nullptr;

    sal_uInt32 i = 0;
    for ( ; i < CountOfCollected(); ++i )
    {
        SwAnchoredObject* pAnchoredObj = GetCollectedObj(i);
        if ( pAnchoredObj->ConsiderObjWrapInfluenceOnObjPos() &&
             pAnchoredObj->GetFrameFormat().GetWrapInfluenceOnObjPos().
                    // #i35017# - handle ITERATIVE as ONCE_SUCCESSIVE
                    GetWrapInfluenceOnObjPos( true ) == _nWrapInfluenceOnPosition )
        {
            // see how SwObjectFormatter::FormatObjsAtFrame_() checks
            // "pPageFrameOfAnchor == &mrPageFrame" - only caller relevant for
            // this subclass
            assert(GetPageFrame().GetPhyPageNum() == GetPgNumOfCollected(i));
            // #i26945# - use new method <_CheckMovedFwdCondition(..)>
            // #i43913#
            if ( SwObjectFormatterTextFrame::CheckMovedFwdCondition( *GetCollectedObj( i ),
                                          GetPageFrame(),
                                          IsCollectedAnchoredAtMaster( i ),
                                          _noToPageNum, _boInFollow,
                                          o_rbPageHasFlysAnchoredBelowThis) )
            {
                pRetAnchoredObj = pAnchoredObj;
                break;
            }
        }
    }

    return pRetAnchoredObj;
}

static SwRowFrame const* FindTopLevelRowFrame(SwFrame const*const pFrame)
{
    SwRowFrame * pRow = const_cast<SwFrame*>(pFrame)->FindRowFrame();
    // looks like SwTabFrame has mbInfTab = true so go up 2 levels
    while (pRow->GetUpper()->GetUpper()->IsInTab())
    {
        pRow = pRow->GetUpper()->GetUpper()->FindRowFrame();
    }
    return pRow;
}

static SwContentFrame const* FindFrameInBody(SwAnchoredObject const& rAnchored)
{
    SwFrame const*const pAnchor(rAnchored.GetAnchorFrame());
    assert(pAnchor);
    if (pAnchor->IsPageFrame() || pAnchor->FindFooterOrHeader())
    {
        return nullptr;
    }
    if (pAnchor->IsInFly())
    {
        return FindFrameInBody(*pAnchor->FindFlyFrame());
    }
    if (pAnchor->IsInFootnote())
    {
        return pAnchor->FindFootnoteFrame()->GetRef();
    }
    assert(pAnchor->IsInDocBody());
    assert(pAnchor->IsContentFrame());
    return static_cast<SwContentFrame const*>(pAnchor);
}

// #i58182#
// - replace private method by corresponding static public method
bool SwObjectFormatterTextFrame::CheckMovedFwdCondition(
                                            SwAnchoredObject& _rAnchoredObj,
                                            SwPageFrame const& rFromPageFrame,
                                            const bool _bAnchoredAtMasterBeforeFormatAnchor,
                                            sal_uInt32& _noToPageNum,
                                            bool& _boInFollow,
                                            bool& o_rbPageHasFlysAnchoredBelowThis)
{
    const sal_uInt32 _nFromPageNum(rFromPageFrame.GetPhyPageNum());
    bool bAnchorIsMovedForward( false );

    SwPageFrame* pPageFrameOfAnchor = _rAnchoredObj.FindPageFrameOfAnchor();
    if ( pPageFrameOfAnchor )
    {
        const sal_uInt32 nPageNum = pPageFrameOfAnchor->GetPhyPageNum();
        if ( nPageNum > _nFromPageNum )
        {
            _noToPageNum = nPageNum;
            // Handling of special case:
            // If anchor frame is move forward into a follow flow row,
            // <_noToPageNum> is set to <_nFromPageNum + 1>, because it is
            // possible that the anchor page frame isn't valid, because the
            // page distance between master row and follow flow row is greater
            // than 1.
            if ( _noToPageNum > (_nFromPageNum + 1) )
            {
                SwFrame* pAnchorFrame = _rAnchoredObj.GetAnchorFrameContainingAnchPos();
                if ( pAnchorFrame->IsInTab() &&
                     pAnchorFrame->IsInFollowFlowRow() )
                {
                    _noToPageNum = _nFromPageNum + 1;
                }
            }
            bAnchorIsMovedForward = true;
        }
    }
    // #i26945# - check, if an at-paragraph|at-character
    // anchored object is now anchored at a follow text frame, which will be
    // on the next page. Also check, if an at-character anchored object
    // is now anchored at a text frame,  which is in a follow flow row,
    // which will be on the next page.
    if ( !bAnchorIsMovedForward &&
         _bAnchoredAtMasterBeforeFormatAnchor &&
        ((_rAnchoredObj.GetFrameFormat().GetAnchor().GetAnchorId() == RndStdIds::FLY_AT_CHAR) ||
         (_rAnchoredObj.GetFrameFormat().GetAnchor().GetAnchorId() == RndStdIds::FLY_AT_PARA)))
    {
        SwFrame* pAnchorFrame = _rAnchoredObj.GetAnchorFrameContainingAnchPos();
        OSL_ENSURE( pAnchorFrame->IsTextFrame(),
                "<SwObjectFormatterTextFrame::CheckMovedFwdCondition(..) - wrong type of anchor frame>" );
        SwTextFrame* pAnchorTextFrame = static_cast<SwTextFrame*>(pAnchorFrame);
        bool bCheck( false );
        if ( pAnchorTextFrame->IsFollow() )
        {
            bCheck = true;
        }
        else if( pAnchorTextFrame->IsInTab() )
        {
            const SwRowFrame* pMasterRow = pAnchorTextFrame->IsInFollowFlowRow();
            if ( pMasterRow &&
                 pMasterRow->FindPageFrame() == pPageFrameOfAnchor )
            {
                bCheck = true;
            }
        }
        if ( bCheck )
        {
            // check, if found text frame will be on the next page
            // by checking, if it's in a column, which has no next.
            SwFrame* pColFrame = pAnchorTextFrame->FindColFrame();
            while ( pColFrame && !pColFrame->GetNext() )
            {
                pColFrame = pColFrame->FindColFrame();
            }
            if ( !pColFrame || !pColFrame->GetNext() )
            {
                _noToPageNum = _nFromPageNum + 1;
                bAnchorIsMovedForward = true;
                // #i43913#
                _boInFollow = true;
            }
        }
    }

    if (bAnchorIsMovedForward)
    {
        // tdf#138518 try to determine if there is a fly on page rFromPageFrame
        // which is anchored in a frame that is "below" the anchor frame
        // of _rAnchoredObj, such that it should move to the next page before
        // _rAnchoredObj does
        if (auto * pObjs = rFromPageFrame.GetSortedObjs())
        {
            for (SwAnchoredObject *const pObj : *pObjs)
            {
                SwPageFrame const*const pObjAnchorPage(pObj->FindPageFrameOfAnchor());
                assert(pObjAnchorPage);
                if ((pObjAnchorPage == &rFromPageFrame
                        ? _boInFollow // same-page but will move forward
                        : rFromPageFrame.GetPhyPageNum() < pObjAnchorPage->GetPhyPageNum())
                    && pObj->GetFrameFormat().GetAnchor().GetAnchorId()
                        != RndStdIds::FLY_AS_CHAR)
                {
                    if (pPageFrameOfAnchor->GetPhyPageNum() < pObjAnchorPage->GetPhyPageNum())
                    {
                        SAL_INFO("sw.layout", "SwObjectFormatterTextFrame::CheckMovedFwdCondition(): o_rbPageHasFlysAnchoredBelowThis because next page");
                        o_rbPageHasFlysAnchoredBelowThis = true;
                        break;
                    }
                    // on same page: check if it's in next-chain in the document body
                    // (in case both are in the same fly the flag must not be
                    // set because the whole fly moves at once)
                    SwContentFrame const*const pInBodyFrameObj(FindFrameInBody(*pObj));
                    SwContentFrame const*const pInBodyFrameAnchoredObj(FindFrameInBody(_rAnchoredObj));
                    if (pInBodyFrameObj && pInBodyFrameAnchoredObj)
                    {
                        bool isBreakMore(false);
                        // currently this ignores index of at-char flys
                        for (SwContentFrame const* pContentFrame = pInBodyFrameAnchoredObj->FindNextCnt();
                             pContentFrame;
                             pContentFrame = pContentFrame->FindNextCnt())
                        {
                            if (pInBodyFrameObj == pContentFrame)
                            {
                                // subsequent cells in a row are not automatically
                                // "below" and the row could potentially be split
                                // TODO refine check if needed
                                if (!pInBodyFrameAnchoredObj->IsInTab()
                                    || FindTopLevelRowFrame(pInBodyFrameAnchoredObj)
                                        != FindTopLevelRowFrame(pInBodyFrameAnchoredObj))
                                {   // anchored in next chain on same page
                                    SAL_INFO("sw.layout", "SwObjectFormatterTextFrame::CheckMovedFwdCondition(): o_rbPageHasFlysAnchoredBelowThis because next chain on same page");
                                    o_rbPageHasFlysAnchoredBelowThis = true;
                                    isBreakMore = true;
                                }
                                break;
                            }
                        }
                        if (isBreakMore)
                        {
                            break;
                        }
                    }
                }
            }
        }
    }

    return bAnchorIsMovedForward;
}

static void CleanupEmptyFootnoteFrame(SwFrame* pLowerFrame)
{
    // Calc on a SwTextFrame in a footnote can move it to the next page -
    // deletion of the SwFootnoteFrame was disabled with SwFrameDeleteGuard
    // but now we have to clean up empty footnote frames to prevent crashes.
    // Note: check it at this level, not lower: both container and footnote
    // can be deleted at the same time!
    if (!pLowerFrame->IsFootnoteContFrame())
        return;

    for (SwFrame * pFootnote = pLowerFrame->GetLower(); pFootnote; )
    {
        assert(pFootnote->IsFootnoteFrame());
        SwFrame *const pNextNote = pFootnote->GetNext();
        if (!pFootnote->IsDeleteForbidden() && !pFootnote->GetLower() && !pFootnote->IsColLocked() &&
            !static_cast<SwFootnoteFrame*>(pFootnote)->IsBackMoveLocked())
        {
            pFootnote->Cut();
            SwFrame::DestroyFrame(pFootnote);
        }
        pFootnote = pNextNote;
    }
}

// #i40140# - helper method to format layout frames used by
// method <SwObjectFormatterTextFrame::FormatAnchorFrameForCheckMoveFwd()>
// #i44049# - format till a certain lower frame, if provided.
static void lcl_FormatContentOfLayoutFrame( SwLayoutFrame* pLayFrame,
                                 SwFrame* pLastLowerFrame = nullptr )
{
    SwFrame* pLowerFrame = pLayFrame->GetLower();
    while ( pLowerFrame )
    {
        // #i44049#
        if ( pLastLowerFrame && pLowerFrame == pLastLowerFrame )
        {
            break;
        }
        if ( pLowerFrame->IsLayoutFrame() )
        {
            SwFrameDeleteGuard aCrudeHack(pLowerFrame); // ??? any issue setting this for non-footnote frames?
            lcl_FormatContentOfLayoutFrame( static_cast<SwLayoutFrame*>(pLowerFrame),
                                        pLastLowerFrame );
        }
        else
            pLowerFrame->Calc(pLowerFrame->getRootFrame()->GetCurrShell()->GetOut());

        // Calc on a SwTextFrame in a footnote can move it to the next page -
        // deletion of the SwFootnoteFrame was disabled with SwFrameDeleteGuard
        // but now we have to clean up empty footnote frames to prevent crashes.
        // Note: check it at this level, not lower: both container and footnote
        // can be deleted at the same time!
        SwFrame *const pNext = pLowerFrame->GetNext();
        CleanupEmptyFootnoteFrame(pLowerFrame);
        pLowerFrame = pNext;
    }
}

void SwObjectFormatterTextFrame::FormatAnchorFrameAndItsPrevs( SwTextFrame& _rAnchorTextFrame )
{
    // #i47014# - no format of section and previous columns
    // for follow text frames.
    if ( !_rAnchorTextFrame.IsFollow() )
    {
        // In case the anchor frame is in a column or section, format its
        // previous frames first - but don't jump out of the current layout
        // environment, e.g. from footnotes into the footnote boss.
        SwFrame * pSectFrame(nullptr);
        SwFrame * pColFrameOfAnchor(nullptr);
        for (SwFrame* pUpper = _rAnchorTextFrame.GetUpper();
             pUpper != nullptr; pUpper = pUpper->GetUpper())
        {
            if (pUpper->IsCellFrame())
            {
                break; // apparently nothing to be done?
            }
            if (pUpper->IsFootnoteFrame())
            {
                SAL_INFO_IF(pColFrameOfAnchor == nullptr && pUpper->FindColFrame(),
                    "sw.layout", "tdf#122894 skipping column for footnote in column");
                break; // stop: prevent crash in case footnotes are being moved
            }
            if (pUpper->IsSctFrame())
            {
                pColFrameOfAnchor = nullptr;
                pSectFrame = pUpper;
                break;
            }
            if (pColFrameOfAnchor != nullptr)
            {   // parent of column not a section frame => column not in section
                break;
            }
            if (pUpper->IsColumnFrame())
            {
                pColFrameOfAnchor = pUpper;
            }
        }

        // if anchor frame is directly inside a section, format this section and
        // its previous frames.
        // Note: It's a very simple format without formatting objects.
        if (pSectFrame)
        {
            assert(pSectFrame->IsSctFrame());
            {
                SwFrameDeleteGuard aDeleteGuard(&_rAnchorTextFrame);
                // #i44049#
                _rAnchorTextFrame.LockJoin();
                SwFrame* pFrame = pSectFrame->GetUpper()->GetLower();
                // #i49605# - section frame could move forward
                // by the format of its previous frame.
                // Thus, check for valid <pFrame>.
                while ( pFrame && pFrame != pSectFrame )
                {
                    SwFrameDeleteGuard aDeleteFrameGuard(pFrame);

                    if ( pFrame->IsLayoutFrame() )
                        lcl_FormatContentOfLayoutFrame( static_cast<SwLayoutFrame*>(pFrame) );
                    else
                        pFrame->Calc(pFrame->getRootFrame()->GetCurrShell()->GetOut());

                    pFrame = pFrame->GetNext();
                }
                lcl_FormatContentOfLayoutFrame( static_cast<SwLayoutFrame*>(pSectFrame),
                                            &_rAnchorTextFrame );
                // #i44049#
                _rAnchorTextFrame.UnlockJoin();
            }
        }

        // #i40140# - if anchor frame is inside a column,
        // format the content of the previous columns.
        // Note: It's a very simple format without formatting objects.
        if (pColFrameOfAnchor)
        {
            assert(pColFrameOfAnchor->IsColumnFrame());
            // #i44049#
            _rAnchorTextFrame.LockJoin();
            SwFrameDeleteGuard aDeleteGuard(&_rAnchorTextFrame);
            SwFrame* pColFrame = pColFrameOfAnchor->GetUpper()->GetLower();
            while ( pColFrame != pColFrameOfAnchor )
            {
                SwFrame* pFrame = pColFrame->GetLower();
                while ( pFrame )
                {
                    if ( pFrame->IsLayoutFrame() )
                        lcl_FormatContentOfLayoutFrame( static_cast<SwLayoutFrame*>(pFrame) );
                    else
                        pFrame->Calc(pFrame->getRootFrame()->GetCurrShell()->GetOut());

                    pFrame = pFrame->GetNext();
                }

                pColFrame = pColFrame->GetNext();
            }
            // #i44049#
            _rAnchorTextFrame.UnlockJoin();
        }
    }

    // format anchor frame - format of its follow not needed
    // #i43255# - forbid follow format, only if anchor text
    // frame is in table
    if ( _rAnchorTextFrame.IsInTab() )
    {
        SwForbidFollowFormat aForbidFollowFormat( _rAnchorTextFrame );
        _rAnchorTextFrame.Calc(_rAnchorTextFrame.getRootFrame()->GetCurrShell()->GetOut());
    }
    else
    {
        _rAnchorTextFrame.Calc(_rAnchorTextFrame.getRootFrame()->GetCurrShell()->GetOut());
    }
}

void SwObjectFormatterTextFrame::FormatAnchorFrameForCheckMoveFwd()
{
    SwObjectFormatterTextFrame::FormatAnchorFrameAndItsPrevs( mrAnchorTextFrame );
}

bool SwObjectFormatterTextFrame::AtLeastOneObjIsTmpConsiderWrapInfluence()
{
    bool bRet( false );

    const SwSortedObjs* pObjs = GetAnchorFrame().GetDrawObjs();
    if ( pObjs && pObjs->size() > 1 )
    {
        for (SwAnchoredObject* pAnchoredObj : *pObjs)
        {
            if ( pAnchoredObj->ConsiderObjWrapInfluenceOnObjPos() )
            {
                bRet = true;
                break;
            }
        }
    }

    return bRet;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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Generated on Tue May 17 2022 12:15:29 for LibreOffice Module sw (master) by   1.8.10