objectformatter.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 "objectformatterlayfrm.hxx"
#include <anchoreddrawobject.hxx>
#include <sortedobjs.hxx>
#include <rootfrm.hxx>
#include <pagefrm.hxx>
#include <flyfrms.hxx>
#include <txtfrm.hxx>
#include <layact.hxx>
#include <IDocumentSettingAccess.hxx>
#include <osl/diagnose.h>

#include <vector>

// --> #i26945# - Additionally the type of the anchor text frame
// is collected - by type is meant 'master' or 'follow'.
class SwPageNumAndTypeOfAnchors
{
    private:
        struct tEntry
        {
            SwAnchoredObject* mpAnchoredObj;
            sal_uInt32 mnPageNumOfAnchor;
            bool mbAnchoredAtMaster;
        };

        std::vector< tEntry > maObjList;

    public:
        SwPageNumAndTypeOfAnchors()
        {
        }

        void Collect( SwAnchoredObject& _rAnchoredObj )
        {
            tEntry aNewEntry;
            aNewEntry.mpAnchoredObj = &_rAnchoredObj;
            // #i33751#, #i34060# - method <GetPageFrameOfAnchor()>
            // is replaced by method <FindPageFrameOfAnchor()>. It's return value
            // have to be checked.
            SwPageFrame* pPageFrameOfAnchor = _rAnchoredObj.FindPageFrameOfAnchor();
            if ( pPageFrameOfAnchor )
            {
                aNewEntry.mnPageNumOfAnchor = pPageFrameOfAnchor->GetPhyPageNum();
            }
            else
            {
                aNewEntry.mnPageNumOfAnchor = 0;
            }
            // --> #i26945# - collect type of anchor
            SwTextFrame* pAnchorCharFrame = _rAnchoredObj.FindAnchorCharFrame();
            if ( pAnchorCharFrame )
            {
                aNewEntry.mbAnchoredAtMaster = !pAnchorCharFrame->IsFollow();
            }
            else
            {
                aNewEntry.mbAnchoredAtMaster = true;
            }
            maObjList.push_back( aNewEntry );
        }

        SwAnchoredObject* operator[]( sal_uInt32 _nIndex )
        {
            return maObjList[_nIndex].mpAnchoredObj;
        }

        sal_uInt32 GetPageNum( sal_uInt32 _nIndex ) const
        {
            return maObjList[_nIndex].mnPageNumOfAnchor;
        }

        // --> #i26945#
        bool AnchoredAtMaster( sal_uInt32 _nIndex )
        {
            return maObjList[_nIndex].mbAnchoredAtMaster;
        }

        sal_uInt32 Count() const
        {
            return maObjList.size();
        }
};

SwObjectFormatter::SwObjectFormatter( const SwPageFrame& _rPageFrame,
                                      SwLayAction* _pLayAction,
                                      const bool _bCollectPgNumOfAnchors )
    : mrPageFrame( _rPageFrame ),
      mbConsiderWrapOnObjPos( _rPageFrame.GetFormat()->getIDocumentSettingAccess().get(DocumentSettingId::CONSIDER_WRAP_ON_OBJECT_POSITION) ),
      mpLayAction( _pLayAction ),
      // --> #i26945#
      mpPgNumAndTypeOfAnchors( _bCollectPgNumOfAnchors ? new SwPageNumAndTypeOfAnchors() : nullptr )
{
}

SwObjectFormatter::~SwObjectFormatter()
{
}

std::unique_ptr<SwObjectFormatter> SwObjectFormatter::CreateObjFormatter(
                                                      SwFrame& _rAnchorFrame,
                                                      const SwPageFrame& _rPageFrame,
                                                      SwLayAction* _pLayAction )
{
    std::unique_ptr<SwObjectFormatter> pObjFormatter;
    if ( _rAnchorFrame.IsTextFrame() )
    {
        pObjFormatter = SwObjectFormatterTextFrame::CreateObjFormatter(
                                            static_cast<SwTextFrame&>(_rAnchorFrame),
                                            _rPageFrame, _pLayAction );
    }
    else if ( _rAnchorFrame.IsLayoutFrame() )
    {
        pObjFormatter = SwObjectFormatterLayFrame::CreateObjFormatter(
                                        static_cast<SwLayoutFrame&>(_rAnchorFrame),
                                        _rPageFrame, _pLayAction );
    }
    else
    {
        OSL_FAIL( "<SwObjectFormatter::CreateObjFormatter(..)> - unexpected type of anchor frame" );
    }

    return pObjFormatter;
}

bool SwObjectFormatter::FormatObjsAtFrame( SwFrame& _rAnchorFrame,
                                         const SwPageFrame& _rPageFrame,
                                         SwLayAction* _pLayAction )
{
    bool bSuccess( true );

    // create corresponding object formatter
    std::unique_ptr<SwObjectFormatter> pObjFormatter =
        SwObjectFormatter::CreateObjFormatter( _rAnchorFrame, _rPageFrame, _pLayAction );

    if ( pObjFormatter )
    {
        // format anchored floating screen objects
        bSuccess = pObjFormatter->DoFormatObjs();
    }

    return bSuccess;
}

bool SwObjectFormatter::FormatObj( SwAnchoredObject& _rAnchoredObj,
                                   SwFrame* _pAnchorFrame,
                                   const SwPageFrame* _pPageFrame )
{
    bool bSuccess( true );

    OSL_ENSURE( _pAnchorFrame || _rAnchoredObj.GetAnchorFrame(),
            "<SwObjectFormatter::FormatObj(..)> - missing anchor frame" );
    SwFrame& rAnchorFrame = _pAnchorFrame ? *_pAnchorFrame : *(_rAnchoredObj.AnchorFrame());

    OSL_ENSURE( _pPageFrame || rAnchorFrame.FindPageFrame(),
            "<SwObjectFormatter::FormatObj(..)> - missing page frame" );
    const SwPageFrame& rPageFrame = _pPageFrame ? *_pPageFrame : *(rAnchorFrame.FindPageFrame());

    // create corresponding object formatter
    std::unique_ptr<SwObjectFormatter> pObjFormatter =
        SwObjectFormatter::CreateObjFormatter( rAnchorFrame, rPageFrame, nullptr/*_pLayAction*/ );

    if ( pObjFormatter )
    {
        // format given floating screen object
        // --> #i40147# - check for moved forward anchor frame
        bSuccess = pObjFormatter->DoFormatObj( _rAnchoredObj, true );
    }

    return bSuccess;
}

void SwObjectFormatter::FormatLayout_( SwLayoutFrame& _rLayoutFrame )
{
    _rLayoutFrame.Calc(_rLayoutFrame.getRootFrame()->GetCurrShell()->GetOut());

    SwFrame* pLowerFrame = _rLayoutFrame.Lower();
    while ( pLowerFrame )
    {
        if ( pLowerFrame->IsLayoutFrame() )
        {
            FormatLayout_( *static_cast<SwLayoutFrame*>(pLowerFrame) );
        }
        pLowerFrame = pLowerFrame->GetNext();
    }
}

void SwObjectFormatter::FormatObjContent( SwAnchoredObject& _rAnchoredObj )
{
    if ( dynamic_cast<const SwFlyFrame*>( &_rAnchoredObj) ==  nullptr )
    {
        // only Writer fly frames have content
        return;
    }

    SwFlyFrame& rFlyFrame = static_cast<SwFlyFrame&>(_rAnchoredObj);
    SwContentFrame* pContent = rFlyFrame.ContainsContent();

    while ( pContent )
    {
        // format content
        pContent->OptCalc();

        // format floating screen objects at content text frame
        // #i23129#, #i36347# - pass correct page frame to
        // the object formatter
        if ( pContent->IsTextFrame() &&
             !SwObjectFormatter::FormatObjsAtFrame( *pContent,
                                                  *(pContent->FindPageFrame()),
                                                  GetLayAction() ) )
        {
            // restart format with first content
            pContent = rFlyFrame.ContainsContent();
            continue;
        }

        // continue with next content
        pContent = pContent->GetNextContentFrame();
    }
}

void SwObjectFormatter::FormatObj_( SwAnchoredObject& _rAnchoredObj )
{
    // collect anchor object and its 'anchor' page number, if requested
    if ( mpPgNumAndTypeOfAnchors )
    {
        mpPgNumAndTypeOfAnchors->Collect( _rAnchoredObj );
    }

    if ( auto pFlyFrame = dynamic_cast<SwFlyFrame*>( &_rAnchoredObj) )
    {
        // --> #i34753# - reset flag, which prevents a positioning
        if ( pFlyFrame->IsFlyLayFrame() )
        {
            static_cast<SwFlyLayFrame*>(pFlyFrame)->SetNoMakePos( false );
        }

        // #i81146# new loop control
        int nLoopControlRuns = 0;
        const int nLoopControlMax = 15;

        do {
            if ( mpLayAction )
            {
                mpLayAction->FormatLayoutFly( pFlyFrame );
                // --> consider, if the layout action
                // has to be restarted due to a delete of a page frame.
                if ( mpLayAction->IsAgain() )
                {
                    break;
                }
            }
            else
            {
                FormatLayout_( *pFlyFrame );
            }
            // --> #i34753# - prevent further positioning, if
            // to-page|to-fly anchored Writer fly frame is already clipped.
            if ( pFlyFrame->IsFlyLayFrame() && pFlyFrame->IsClipped() )
            {
                static_cast<SwFlyLayFrame*>(pFlyFrame)->SetNoMakePos( true );
            }
            // #i23129#, #i36347# - pass correct page frame
            // to the object formatter
            SwObjectFormatter::FormatObjsAtFrame( *pFlyFrame,
                                                *(pFlyFrame->FindPageFrame()),
                                                mpLayAction );
            if ( mpLayAction )
            {
                mpLayAction->FormatFlyContent( pFlyFrame );
                // --> consider, if the layout action
                // has to be restarted due to a delete of a page frame.
                if ( mpLayAction->IsAgain() )
                {
                    break;
                }
            }
            else
            {
                FormatObjContent( *pFlyFrame );
            }

            if ( ++nLoopControlRuns >= nLoopControlMax )
            {
                OSL_FAIL( "LoopControl in SwObjectFormatter::FormatObj_: Stage 3!!!" );
                pFlyFrame->ValidateThisAndAllLowers( 2 );
                nLoopControlRuns = 0;
            }

        // --> #i57917#
        // stop formatting of anchored object, if restart of layout process is requested.
        } while ( !pFlyFrame->isFrameAreaDefinitionValid() &&
                  !_rAnchoredObj.RestartLayoutProcess() &&
                  pFlyFrame->GetAnchorFrame() == &GetAnchorFrame() );
    }
    else if ( dynamic_cast<const SwAnchoredDrawObject*>( &_rAnchoredObj) !=  nullptr )
    {
        _rAnchoredObj.MakeObjPos();
    }
}

bool SwObjectFormatter::FormatObjsAtFrame_( SwTextFrame* _pMasterTextFrame )
{
    // --> #i26945#
    SwFrame* pAnchorFrame( nullptr );
    if ( GetAnchorFrame().IsTextFrame() &&
         static_cast<SwTextFrame&>(GetAnchorFrame()).IsFollow() &&
         _pMasterTextFrame )
    {
        pAnchorFrame = _pMasterTextFrame;
    }
    else
    {
        pAnchorFrame = &GetAnchorFrame();
    }
    if ( !pAnchorFrame->GetDrawObjs() )
    {
        // nothing to do, if no floating screen object is registered at the anchor frame.
        return true;
    }

    bool bSuccess( true );

    for ( size_t i = 0; i < pAnchorFrame->GetDrawObjs()->size(); ++i )
    {
        SwAnchoredObject* pAnchoredObj = (*pAnchorFrame->GetDrawObjs())[i];

        // check, if object's anchor is on the given page frame or
        // object is registered at the given page frame.
        // --> #i26945# - check, if the anchor character of the
        // anchored object is located in a follow text frame. If this anchor
        // follow text frame differs from the given anchor frame, the given
        // anchor frame is a 'master' text frame of the anchor follow text frame.
        // If the anchor follow text frame is in the same body as its 'master'
        // text frame, do not format the anchored object.
        // E.g., this situation can occur during the table row splitting algorithm.
        SwTextFrame* pAnchorCharFrame = pAnchoredObj->FindAnchorCharFrame();
        const bool bAnchoredAtFollowInSameBodyAsMaster =
                pAnchorCharFrame && pAnchorCharFrame->IsFollow() &&
                pAnchorCharFrame != pAnchoredObj->GetAnchorFrame() &&
                pAnchorCharFrame->FindBodyFrame() ==
                    static_cast<SwTextFrame*>(pAnchoredObj->AnchorFrame())->FindBodyFrame();
        if ( bAnchoredAtFollowInSameBodyAsMaster )
        {
            continue;
        }
        // #i33751#, #i34060# - method <GetPageFrameOfAnchor()>
        // is replaced by method <FindPageFrameOfAnchor()>. It's return value
        // have to be checked.
        SwPageFrame* pPageFrameOfAnchor = pAnchoredObj->FindPageFrameOfAnchor();
        OSL_ENSURE( pPageFrameOfAnchor,
                "<SwObjectFormatter::FormatObjsAtFrame_()> - missing page frame." );
        // --> #i26945#
        if ( pPageFrameOfAnchor && pPageFrameOfAnchor == &mrPageFrame )
        {
            // if format of object fails, stop formatting and pass fail to
            // calling method via the return value.
            if ( !DoFormatObj( *pAnchoredObj ) )
            {
                bSuccess = false;
                break;
            }

            // considering changes at <pAnchorFrame->GetDrawObjs()> during
            // format of the object.
            if ( !pAnchorFrame->GetDrawObjs() ||
                 i > pAnchorFrame->GetDrawObjs()->size() )
            {
                break;
            }
            else
            {
                const size_t nActPosOfObj =
                    pAnchorFrame->GetDrawObjs()->ListPosOf( *pAnchoredObj );
                if ( nActPosOfObj == pAnchorFrame->GetDrawObjs()->size() ||
                     nActPosOfObj > i )
                {
                    --i;
                }
                else if ( nActPosOfObj < i )
                {
                    i = nActPosOfObj;
                }
            }
        }
    } // end of loop on <pAnchorFrame->.GetDrawObjs()>

    return bSuccess;
}

SwAnchoredObject* SwObjectFormatter::GetCollectedObj( const sal_uInt32 _nIndex )
{
    return mpPgNumAndTypeOfAnchors ? (*mpPgNumAndTypeOfAnchors)[_nIndex] : nullptr;
}

sal_uInt32 SwObjectFormatter::GetPgNumOfCollected( const sal_uInt32 _nIndex )
{
    return mpPgNumAndTypeOfAnchors ? mpPgNumAndTypeOfAnchors->GetPageNum(_nIndex) : 0;
}

bool SwObjectFormatter::IsCollectedAnchoredAtMaster( const sal_uInt32 _nIndex )
{
    return mpPgNumAndTypeOfAnchors == nullptr
           || mpPgNumAndTypeOfAnchors->AnchoredAtMaster(_nIndex);
}

sal_uInt32 SwObjectFormatter::CountOfCollected()
{
    return mpPgNumAndTypeOfAnchors ? mpPgNumAndTypeOfAnchors->Count() : 0;
}

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