Quelle  dcontact.cxx

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

#include <memory>
#include <hintids.hxx>
#include <svx/svdpage.hxx>
#include <svx/svditer.hxx>
#include <svx/svdogrp.hxx>
#include <svx/svdotext.hxx>
#include <svx/svdmodel.hxx>
#include <svx/svdviter.hxx>
#include <svx/svdview.hxx>
#include <svx/sdr/contact/displayinfo.hxx>
#include <svx/sdr/contact/objectcontact.hxx>
#include <drawdoc.hxx>
#include <fmtornt.hxx>
#include <viewimp.hxx>
#include <fmtsrnd.hxx>
#include <fmtanchr.hxx>
#include <node.hxx>
#include <fmtcntnt.hxx>
#include <fmtfsize.hxx>
#include <pam.hxx>
#include <pagefrm.hxx>
#include <rootfrm.hxx>
#include <frmtool.hxx>
#include <flyfrm.hxx>
#include <textboxhelper.hxx>
#include <frmfmt.hxx>
#include <fmtfollowtextflow.hxx>
#include <dflyobj.hxx>
#include <dcontact.hxx>
#include <unodraw.hxx>
#include <IDocumentDrawModelAccess.hxx>
#include <IDocumentLayoutAccess.hxx>
#include <IDocumentState.hxx>
#include <IDocumentUndoRedo.hxx>
#include <doc.hxx>
#include <hints.hxx>
#include <txtfrm.hxx>
#include <frameformats.hxx>
#include <sortedobjs.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <svx/sdr/contact/viewcontactofvirtobj.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
#include <drawinglayer/geometry/viewinformation2d.hxx>
#include <svx/sdr/contact/viewobjectcontactofsdrobj.hxx>
#include <com/sun/star/text/WritingMode2.hpp>
#include <calbck.hxx>
#include <algorithm>
#include <txtfly.hxx>
#include <sal/log.hxx>

using namespace ::com::sun::star;

namespace
{
    /** unary function used to find a 'virtual' drawing object anchored at a given frame */
    struct VirtObjAnchoredAtFramePred
    {
        const SwFrame* m_pAnchorFrame;

        // #i26791# - compare with master frame
        static const SwFrame* FindFrame(const SwFrame* pFrame)
        {
            if(!pFrame || !pFrame->IsContentFrame())
                return pFrame;
            auto pContentFrame = static_cast<const SwContentFrame*>(pFrame);
            while(pContentFrame->IsFollow())
                pContentFrame = pContentFrame->FindMaster();
            return pContentFrame;
        }

        VirtObjAnchoredAtFramePred(const SwFrame* pAnchorFrame)
        :   m_pAnchorFrame(FindFrame(pAnchorFrame))
        {}

        bool operator()(const rtl::Reference<SwDrawVirtObj>& rpDrawVirtObj)
        {
            return FindFrame(rpDrawVirtObj->GetAnchorFrame()) == m_pAnchorFrame;
        }
    };
}

void setContextWritingMode(SdrObject* pObj, SwFrame const * pAnchor)
{
    if(!pObj || !pAnchor)
        return;
    short nWritingDirection =
            pAnchor->IsVertical()    ? text::WritingMode2::TB_RL :
            pAnchor->IsRightToLeft() ? text::WritingMode2::RL_TB :
                    text::WritingMode2::LR_TB;
    pObj->SetContextWritingMode(nWritingDirection);
}


/** The Get reverse way: seeks the format to the specified object.
 * If the object is a SwVirtFlyDrawObj then the format of this
 * will be acquired.
 * Otherwise it is just a simple drawing object. This has a
 * UserCall and is the client of the searched format.
*/
SwFrameFormat *FindFrameFormat( SdrObject *pObj )
{
    if (SwVirtFlyDrawObj* pFlyDrawObj = dynamic_cast<SwVirtFlyDrawObj*>(pObj))
       return pFlyDrawObj->GetFormat();

    if (SwContact* pContact = GetUserCall(pObj))
        return pContact->GetFormat();

    return nullptr;
}

bool HasWrap( const SdrObject* pObj )
{
    if ( pObj )
    {
        const SwFrameFormat* pFormat = ::FindFrameFormat( pObj );
        if ( pFormat )
        {
            return css::text::WrapTextMode_THROUGH != pFormat->GetSurround().GetSurround();
        }
    }

    return false;
}

/// returns the BoundRect _inclusive_ distance of the object.
SwRect GetBoundRectOfAnchoredObj( const SdrObject* pObj )
{
    SwRect aRet( pObj->GetCurrentBoundRect() );
    // #i68520# - call cache of <SwAnchoredObject>
    SwContact* pContact( GetUserCall( pObj ) );
    if ( pContact )
    {
        const SwAnchoredObject* pAnchoredObj( pContact->GetAnchoredObj( pObj ) );
        if ( pAnchoredObj )
        {
            aRet = pAnchoredObj->GetObjRectWithSpaces();
        }
    }
    return aRet;
}

/// Returns the UserCall if applicable from the group object
SwContact* GetUserCall( const SdrObject* pObj )
{
    for (; pObj; pObj = pObj->getParentSdrObjectFromSdrObject())
    {
        if (auto pUserCall = pObj->GetUserCall())
        {
            assert(dynamic_cast<SwContact*>(pUserCall)
                   && "<::GetUserCall(..)> - wrong type of found object user call.");
            return static_cast<SwContact*>(pUserCall);
        }
    }
    return nullptr;
}

/// Returns true if the SrdObject is a Marquee-Object (scrolling text)
bool IsMarqueeTextObj( const SdrObject& rObj )
{
    if (SdrInventor::Default != rObj.GetObjInventor() ||
        SdrObjKind::Text != rObj.GetObjIdentifier())
        return false;
    SdrTextAniKind eTKind = static_cast<const SdrTextObj&>(rObj).GetTextAniKind();
    return ( SdrTextAniKind::Scroll == eTKind
         || SdrTextAniKind::Alternate == eTKind || SdrTextAniKind::Slide == eTKind );
}

SwContact::SwContact( SwFrameFormat *pToRegisterIn ) :
    SwClient( pToRegisterIn ),
    mbInDTOR( false )
{}

SwContact::~SwContact()
{
    SetInDTOR();
}


void SwContact::SetInDTOR()
{
    mbInDTOR = true;
}

/// method to move drawing object to corresponding visible layer
void SwContact::MoveObjToVisibleLayer( SdrObject* _pDrawObj )
{
    // #i46297# - notify background about the arriving of
    // the object and invalidate its position.
    const bool bNotify( !GetFormat()->getIDocumentDrawModelAccess().IsVisibleLayerId( _pDrawObj->GetLayer() ) );

    MoveObjToLayer( true, _pDrawObj );

    // #i46297#
    if ( !bNotify )
        return;

    SwAnchoredObject* pAnchoredObj = GetAnchoredObj( _pDrawObj );
    assert(pAnchoredObj);
    ::setContextWritingMode( _pDrawObj, pAnchoredObj->GetAnchorFrameContainingAnchPos() );
    // Note: as-character anchored objects aren't registered at a page frame and
    //       a notification of its background isn't needed.
    if ( pAnchoredObj->GetPageFrame() )
    {
        ::Notify_Background( _pDrawObj, pAnchoredObj->GetPageFrame(),
                             pAnchoredObj->GetObjRect(), PrepareHint::FlyFrameArrive, true );
    }

    pAnchoredObj->InvalidateObjPos();
}

/// method to move drawing object to corresponding invisible layer - #i18447#
void SwContact::MoveObjToInvisibleLayer( SdrObject* _pDrawObj )
{
    // #i46297# - notify background about the leaving of the object.
    const bool bNotify( GetFormat()->getIDocumentDrawModelAccess().IsVisibleLayerId( _pDrawObj->GetLayer() ) );

    MoveObjToLayer( false, _pDrawObj );

    // #i46297#
    if ( bNotify )
    {
        SwAnchoredObject* pAnchoredObj = GetAnchoredObj( _pDrawObj );
        assert(pAnchoredObj);
        // Note: as-character anchored objects aren't registered at a page frame and
        //       a notification of its background isn't needed.
        if (pAnchoredObj->GetPageFrame())
        {
            ::Notify_Background( _pDrawObj, pAnchoredObj->GetPageFrame(),
                                 pAnchoredObj->GetObjRect(), PrepareHint::FlyFrameLeave, true );
        }
    }
}

/** method to move object to visible/invisible layer -  #i18447#

    implementation for the public method <MoveObjToVisibleLayer(..)>
    and <MoveObjToInvisibleLayer(..)>
*/
void SwContact::MoveObjToLayer( const bool _bToVisible,
                                 SdrObject* _pDrawObj )
{
    if ( !_pDrawObj )
    {
        OSL_FAIL( "SwDrawContact::MoveObjToLayer(..) - no drawing object!" );
        return;
    }

    if ( !GetRegisteredIn() )
    {
        OSL_FAIL( "SwDrawContact::MoveObjToLayer(..) - no drawing frame format!" );
        return;
    }

    const IDocumentDrawModelAccess& rIDDMA = static_cast<SwFrameFormat*>(GetRegisteredInNonConst())->getIDocumentDrawModelAccess();

    SdrLayerID nToHellLayerId =
        _bToVisible ? rIDDMA.GetHellId() : rIDDMA.GetInvisibleHellId();
    SdrLayerID nToHeavenLayerId =
        _bToVisible ? rIDDMA.GetHeavenId() : rIDDMA.GetInvisibleHeavenId();
    SdrLayerID nToControlLayerId =
        _bToVisible ? rIDDMA.GetControlsId() : rIDDMA.GetInvisibleControlsId();
    SdrLayerID nFromHellLayerId =
        _bToVisible ? rIDDMA.GetInvisibleHellId() : rIDDMA.GetHellId();
    SdrLayerID nFromHeavenLayerId =
        _bToVisible ? rIDDMA.GetInvisibleHeavenId() : rIDDMA.GetHeavenId();
    SdrLayerID nFromControlLayerId =
        _bToVisible ? rIDDMA.GetInvisibleControlsId() : rIDDMA.GetControlsId();

    if ( dynamic_cast<const SdrObjGroup*>( _pDrawObj) !=  nullptr )
    {
        // determine layer for group object
        {
            // proposed layer of a group object is the hell layer
            SdrLayerID nNewLayerId = nToHellLayerId;
            if ( ::CheckControlLayer( _pDrawObj ) )
            {
                // it has to be the control layer, if one of the member
                // is a control
                nNewLayerId = nToControlLayerId;
            }
            else if ( _pDrawObj->GetLayer() == rIDDMA.GetHeavenId() ||
                      _pDrawObj->GetLayer() == rIDDMA.GetInvisibleHeavenId() )
            {
                // it has to be the heaven layer, if method <GetLayer()> reveals
                // a heaven layer
                nNewLayerId = nToHeavenLayerId;
            }
            // set layer at group object, but do *not* broadcast and
            // no propagation to the members.
            // Thus, call <NbcSetLayer(..)> at super class
            _pDrawObj->SdrObject::NbcSetLayer( nNewLayerId );
        }

        // call method recursively for group object members
        const SdrObjList* pLst =
                static_cast<SdrObjGroup*>(_pDrawObj)->GetSubList();
        if ( pLst )
        {
            for (const rtl::Reference<SdrObject>& pObj : *pLst)
            {
                MoveObjToLayer( _bToVisible, pObj.get() );
            }
        }
    }
    else
    {
        const SdrLayerID nLayerIdOfObj = _pDrawObj->GetLayer();
        if ( nLayerIdOfObj == nFromHellLayerId )
        {
            _pDrawObj->SetLayer( nToHellLayerId );
        }
        else if ( nLayerIdOfObj == nFromHeavenLayerId )
        {
            _pDrawObj->SetLayer( nToHeavenLayerId );
        }
        else if ( nLayerIdOfObj == nFromControlLayerId )
        {
            _pDrawObj->SetLayer( nToControlLayerId );
        }
    }
}

/// get minimum order number of anchored objects handled by with contact
sal_uInt32 SwContact::GetMinOrdNum() const
{
    sal_uInt32 nMinOrdNum( SAL_MAX_UINT32 );

    std::vector< SwAnchoredObject* > aObjs;
    GetAnchoredObjs( aObjs );

    while ( !aObjs.empty() )
    {
        sal_uInt32 nTmpOrdNum = aObjs.back()->GetDrawObj()->GetOrdNum();

        if ( nTmpOrdNum < nMinOrdNum )
        {
            nMinOrdNum = nTmpOrdNum;
        }

        aObjs.pop_back();
    }

    OSL_ENSURE( nMinOrdNum != SAL_MAX_UINT32,
            "<SwContact::GetMinOrdNum()> - no order number found." );
    return nMinOrdNum;
}

/// get maximum order number of anchored objects handled by with contact
sal_uInt32 SwContact::GetMaxOrdNum() const
{
    sal_uInt32 nMaxOrdNum( 0 );

    std::vector< SwAnchoredObject* > aObjs;
    GetAnchoredObjs( aObjs );

    while ( !aObjs.empty() )
    {
        sal_uInt32 nTmpOrdNum = aObjs.back()->GetDrawObj()->GetOrdNum();

        if ( nTmpOrdNum > nMaxOrdNum )
        {
            nMaxOrdNum = nTmpOrdNum;
        }

        aObjs.pop_back();
    }

    return nMaxOrdNum;
}

namespace
{
    Point lcl_GetWW8Pos(SwAnchoredObject const * pAnchoredObj, const bool bFollowTextFlow, sw::WW8AnchorConv& reConv)
    {
        switch(reConv)
        {
            case sw::WW8AnchorConv::CONV2PG:
            {
                bool bRelToTableCell(false);
                Point aPos(pAnchoredObj->GetRelPosToPageFrame(bFollowTextFlow, bRelToTableCell));
                if(bRelToTableCell)
                    reConv = sw::WW8AnchorConv::RELTOTABLECELL;
                return aPos;
            }
            case sw::WW8AnchorConv::CONV2COL_OR_PARA:
                return pAnchoredObj->GetRelPosToAnchorFrame();
            case sw::WW8AnchorConv::CONV2CHAR:
                return pAnchoredObj->GetRelPosToChar();
            case sw::WW8AnchorConv::CONV2LINE:
                return pAnchoredObj->GetRelPosToLine();
            default: ;
        }
        return Point();
    }
}
void SwContact::SwClientNotify(const SwModify& rMod, const SfxHint& rHint)
{
    // this does not call SwClient::SwClientNotify and thus doesn't handle RES_OBJECTDYING as usual. Is this intentional?
    if (rHint.GetId() == SfxHintId::SwFindSdrObject)
    {
        auto pFindSdrObjectHint = static_cast<const sw::FindSdrObjectHint*>(&rHint);
        if(!pFindSdrObjectHint->m_rpObject)
            pFindSdrObjectHint->m_rpObject = GetMaster();
    }
    else if (rHint.GetId() == SfxHintId::SwWW8AnchorConv)
    {
        auto pWW8AnchorConvHint = static_cast<const sw::WW8AnchorConvHint*>(&rHint);
        // determine anchored object
        SwAnchoredObject* pAnchoredObj(nullptr);
        {
            std::vector<SwAnchoredObject*> aAnchoredObjs;
            GetAnchoredObjs(aAnchoredObjs);
            if(!aAnchoredObjs.empty())
                pAnchoredObj = aAnchoredObjs.front();
        }
        // no anchored object found. Thus, the needed layout information can't
        // be determined. --> no conversion
        if(!pAnchoredObj)
            return;
        // no conversion for anchored drawing object, which aren't attached to an
        // anchor frame.
        // This is the case for drawing objects, which are anchored inside a page
        // header/footer of an *unused* page style.
        if(dynamic_cast<SwAnchoredDrawObject*>(pAnchoredObj) && !pAnchoredObj->GetAnchorFrame())
            return;
        const bool bFollowTextFlow = static_cast<const SwFrameFormat&>(rMod).GetFollowTextFlow().GetValue();
        sw::WW8AnchorConvResult& rResult(pWW8AnchorConvHint->m_rResult);
        // No distinction between layout directions, because of missing
        // information about WW8 in vertical layout.
        rResult.m_aPos.setX(lcl_GetWW8Pos(pAnchoredObj, bFollowTextFlow, rResult.m_eHoriConv).getX());
        rResult.m_aPos.setY(lcl_GetWW8Pos(pAnchoredObj, bFollowTextFlow, rResult.m_eVertConv).getY());
        rResult.m_bConverted = true;
    }
}


SwFlyDrawContact::SwFlyDrawContact(
    SwFlyFrameFormat *pToRegisterIn,
    SdrModel& rTargetModel)
:   SwContact(pToRegisterIn),
    mpMasterObj(new SwFlyDrawObj(rTargetModel))
{
    // #i26791# - class <SwFlyDrawContact> contains the 'master'
    // drawing object of type <SwFlyDrawObj> on its own.
    mpMasterObj->SetOrdNum( 0xFFFFFFFE );
    mpMasterObj->SetUserCall( this );
}

SwFlyDrawContact::~SwFlyDrawContact()
{
    if ( mpMasterObj )
    {
        mpMasterObj->SetUserCall( nullptr );
        if ( mpMasterObj->getSdrPageFromSdrObject() )
            mpMasterObj->getSdrPageFromSdrObject()->RemoveObject( mpMasterObj->GetOrdNum() );
    }
}

sal_uInt32 SwFlyDrawContact::GetOrdNumForNewRef(const SwFlyFrame* pFly,
        SwFrame const& rAnchorFrame)
{
    // maintain invariant that a shape's textbox immediately follows the shape
    // also for the multiple SdrVirtObj created for shapes in header/footer
    if (SwFrameFormat const*const pDrawFormat =
            SwTextBoxHelper::getOtherTextBoxFormat(GetFormat(), RES_FLYFRMFMT))
    {
        // assume that the draw SdrVirtObj is always created before the flyframe one
        if (SwSortedObjs const*const pObjs = rAnchorFrame.GetDrawObjs())
        {
            for (SwAnchoredObject const*const pAnchoredObj : *pObjs)
            {
                if (pAnchoredObj->GetFrameFormat() == pDrawFormat)
                {
                    return pAnchoredObj->GetDrawObj()->GetOrdNum() + 1;
                }
            }
        }
        // if called from AppendObjs(), this is a problem; if called from lcl_SetFlyFrameAttr() it's not
        SAL_INFO("sw", "GetOrdNumForNewRef: cannot find SdrObject for text box's shape");
    }
    // search for another Writer fly frame registered at same frame format
    SwIterator<SwFlyFrame,SwFormat> aIter(*GetFormat());
    const SwFlyFrame* pFlyFrame(nullptr);
    for(pFlyFrame = aIter.First(); pFlyFrame; pFlyFrame = aIter.Next())
    {
        if(pFlyFrame != pFly)
            break;
    }

    if(pFlyFrame)
    {
        // another Writer fly frame found. Take its order number
        return pFlyFrame->GetVirtDrawObj()->GetOrdNum();
    }
    // no other Writer fly frame found. Take order number of 'master' object
    // #i35748# - use method <GetOrdNumDirect()> instead
    // of method <GetOrdNum()> to avoid a recalculation of the order number,
    // which isn't intended.
    return GetMaster()->GetOrdNumDirect();
}

SwVirtFlyDrawObj* SwFlyDrawContact::CreateNewRef(SwFlyFrame* pFly,
        SwFlyFrameFormat* pFormat, SwFrame const& rAnchorFrame)
{
    // Find ContactObject from the Format. If there's already one, we just
    // need to create a new Ref, else we create the Contact now.

    IDocumentDrawModelAccess& rIDDMA = pFormat->getIDocumentDrawModelAccess();
    SwFlyDrawContact* pContact = pFormat->GetOrCreateContact();
    rtl::Reference<SwVirtFlyDrawObj> pDrawObj(
        new SwVirtFlyDrawObj(
            pContact->GetMaster()->getSdrModelFromSdrObject(),
            *pContact->GetMaster(),
            pFly));
    pDrawObj->SetUserCall(pContact);

    // The Reader creates the Masters and inserts them into the Page in
    // order to transport the z-order.
    // After creating the first Reference the Masters are removed from the
    // List and are not important anymore.
    SdrPage* pPg = pContact->GetMaster()->getSdrPageFromSdrObject();
    if(nullptr != pPg)
    {
        const size_t nOrdNum = pContact->GetMaster()->GetOrdNum();
        pPg->ReplaceObject(pDrawObj.get(), nOrdNum);
    }
    // #i27030# - insert new <SwVirtFlyDrawObj> instance
    // into drawing page with correct order number
    else
        rIDDMA.GetDrawModel()->GetPage(0)->InsertObject(pDrawObj.get(), pContact->GetOrdNumForNewRef(pFly, rAnchorFrame));
    // #i38889# - assure, that new <SwVirtFlyDrawObj> instance
    // is in a visible layer.
    pContact->MoveObjToVisibleLayer(pDrawObj.get());
    return pDrawObj.get();
}

// #i26791#
const SwAnchoredObject* SwFlyDrawContact::GetAnchoredObj(const SdrObject* pSdrObj) const
{
    assert(pSdrObj);
    assert(dynamic_cast<const SwVirtFlyDrawObj*>(pSdrObj) != nullptr);
    assert(GetUserCall(pSdrObj) == this &&
        "<SwFlyDrawContact::GetAnchoredObj(..)> - provided object doesn't belong to this contact");

    const SwAnchoredObject *const pRetAnchoredObj =
        static_cast<const SwVirtFlyDrawObj*>(pSdrObj)->GetFlyFrame();

    return pRetAnchoredObj;
}

SwAnchoredObject* SwFlyDrawContact::GetAnchoredObj(SdrObject *const pSdrObj)
{
    return const_cast<SwAnchoredObject *>(const_cast<SwFlyDrawContact const*>(this)->GetAnchoredObj(pSdrObj));
}

SdrObject* SwFlyDrawContact::GetMaster()
{
    return mpMasterObj.get();
}

/**
 * @note Overriding method to control Writer fly frames, which are linked, and
 *       to assure that all objects anchored at/inside the Writer fly frame are
 *       also made visible.
 */
void SwFlyDrawContact::MoveObjToVisibleLayer( SdrObject* _pDrawObj )
{
    assert(dynamic_cast<const SwVirtFlyDrawObj*>(_pDrawObj) != nullptr);

    if ( GetFormat()->getIDocumentDrawModelAccess().IsVisibleLayerId( _pDrawObj->GetLayer() ) )
    {
        // nothing to do
        return;
    }

    SwFlyFrame* pFlyFrame = static_cast<SwVirtFlyDrawObj*>(_pDrawObj)->GetFlyFrame();

    // #i44464# - consider, that Writer fly frame content
    // already exists - (e.g. WW8 document is inserted into an existing document).
    if ( !pFlyFrame->Lower() )
    {
        pFlyFrame->InsertColumns();
        pFlyFrame->Chain( pFlyFrame->AnchorFrame() );
        pFlyFrame->InsertCnt();
    }
    if ( pFlyFrame->GetDrawObjs() )
    {
        for (SwAnchoredObject* i : *pFlyFrame->GetDrawObjs())
        {
            // #i28701# - consider type of objects in sorted object list.
            SdrObject* pObj = i->DrawObj();
            SwContact* pContact = static_cast<SwContact*>(pObj->GetUserCall());
            pContact->MoveObjToVisibleLayer( pObj );
        }
    }

    // make fly frame visible
    SwContact::MoveObjToVisibleLayer( _pDrawObj );
}

/**
 * @note Override method to control Writer fly frames, which are linked, and
 *       to assure that all objects anchored at/inside the Writer fly frame are
 *       also made invisible.
 */
void SwFlyDrawContact::MoveObjToInvisibleLayer( SdrObject* _pDrawObj )
{
    assert(dynamic_cast<const SwVirtFlyDrawObj*>(_pDrawObj) != nullptr);

    if ( !GetFormat()->getIDocumentDrawModelAccess().IsVisibleLayerId( _pDrawObj->GetLayer() ) )
    {
        // nothing to do
        return;
    }

    SwFlyFrame* pFlyFrame = static_cast<SwVirtFlyDrawObj*>(_pDrawObj)->GetFlyFrame();

    pFlyFrame->Unchain();
    pFlyFrame->DeleteCnt();
    if ( pFlyFrame->GetDrawObjs() )
    {
        for (SwAnchoredObject* i : *pFlyFrame->GetDrawObjs())
        {
            // #i28701# - consider type of objects in sorted object list.
            SdrObject* pObj = i->DrawObj();
            SwContact* pContact = static_cast<SwContact*>(pObj->GetUserCall());
            pContact->MoveObjToInvisibleLayer( pObj );
        }
    }

    // make fly frame invisible
    SwContact::MoveObjToInvisibleLayer( _pDrawObj );
}

/// get data collection of anchored objects, handled by with contact
void SwFlyDrawContact::GetAnchoredObjs( std::vector<SwAnchoredObject*>& _roAnchoredObjs ) const
{
    const SwFrameFormat* pFormat = GetFormat();
    SwFlyFrame::GetAnchoredObjects( _roAnchoredObjs, *pFormat );
}
void SwFlyDrawContact::SwClientNotify(const SwModify& rMod, const SfxHint& rHint)
{
    SwContact::SwClientNotify(rMod, rHint);
    if(rHint.GetId() == SfxHintId::SwGetZOrder)
    {
        auto pGetZOrdnerHint = static_cast<const sw::GetZOrderHint*>(&rHint);
        // #i11176#
        // This also needs to work when no layout exists. Thus, for
        // FlyFrames an alternative method is used now in that case.
        auto pFormat(dynamic_cast<const SwFrameFormat*>(&rMod));
        if (pFormat && pFormat->Which() == RES_FLYFRMFMT && !pFormat->getIDocumentLayoutAccess().GetCurrentViewShell())
            pGetZOrdnerHint->m_rnZOrder = GetMaster()->GetOrdNum();
    }
}

// SwDrawContact

bool CheckControlLayer( const SdrObject *pObj )
{
    if ( SdrInventor::FmForm == pObj->GetObjInventor() )
        return true;
    if (const SdrObjGroup *pObjGroup = dynamic_cast<const SdrObjGroup*>(pObj))
    {
        const SdrObjList *pLst = pObjGroup->GetSubList();
        for (const rtl::Reference<SdrObject>& pChildObj : *pLst)
        {
            if ( ::CheckControlLayer( pChildObj.get() ) )
            {
                // #i18447# - return correct value ;-)
                return true;
            }
        }
    }
    return false;
}

SwDrawContact::SwDrawContact( SwFrameFormat* pToRegisterIn, SdrObject* pObj ) :
    SwContact( pToRegisterIn ),
    mbMasterObjCleared( false ),
    mbDisconnectInProgress( false ),
    mbUserCallActive( false ),
    // Note: value of <meEventTypeOfCurrentUserCall> isn't of relevance, because
    //       <mbUserCallActive> is false.
    meEventTypeOfCurrentUserCall( SdrUserCallType::MoveOnly )
{
    // --> #i33909# - assure, that drawing object is inserted
    // in the drawing page.
    if ( !pObj->IsInserted() )
    {
        pToRegisterIn->getIDocumentDrawModelAccess().GetDrawModel()->GetPage(0)->
                                InsertObject( pObj, pObj->GetOrdNumDirect() );
    }

    // Controls have to be always in the Control-Layer. This is also true for
    // group objects, if they contain controls.
    if ( ::CheckControlLayer( pObj ) )
    {
        // set layer of object to corresponding invisible layer.
        pObj->SetLayer( pToRegisterIn->getIDocumentDrawModelAccess().GetInvisibleControlsId() );
    }

    // #i26791#
    pObj->SetUserCall( this );
    maAnchoredDrawObj.SetDrawObj( *pObj );

    // if there already exists an SwXShape for the object, ensure it knows about us, and the SdrObject
    // #i99056#
    SwXShape::AddExistingShapeToFormat( *pObj );
}

SwDrawContact::~SwDrawContact()
{
    SetInDTOR();

    DisconnectFromLayout();

    // remove 'master' from drawing page
    RemoveMasterFromDrawPage();

    // remove and destroy 'virtual' drawing objects.
    RemoveAllVirtObjs();

    if ( !mbMasterObjCleared )
        maAnchoredDrawObj.ClearDrawObj();
}

void SwDrawContact::GetTextObjectsFromFormat(std::list<SdrTextObj*>& o_rTextObjects, SwDoc& rDoc)
{
    for(sw::SpzFrameFormat* pFly: *rDoc.GetSpzFrameFormats())
    {
        if(pFly->Which() == RES_DRAWFRMFMT) // ie. SwDrawFrameFormat*
            pFly->CallSwClientNotify(sw::CollectTextObjectsHint(o_rTextObjects));
    }
}

// #i26791#
const SwAnchoredObject* SwDrawContact::GetAnchoredObj(const SdrObject* pSdrObj ) const
{
    // handle default parameter value
    if (!pSdrObj)
    {
        pSdrObj = GetMaster();
    }

    assert(pSdrObj);
    assert(dynamic_cast<const SwDrawVirtObj*>(pSdrObj) != nullptr ||
           dynamic_cast<const SdrVirtObj*>(pSdrObj) == nullptr);
    assert((GetUserCall(pSdrObj) == this ||
            pSdrObj == GetMaster()) &&
            "<SwDrawContact::GetAnchoredObj(..)> - provided object doesn't belongs to this contact" );

    const SwAnchoredObject* pRetAnchoredObj = nullptr;

    if (auto pVirtObj = dynamic_cast<const SwDrawVirtObj*>(pSdrObj))
    {
        pRetAnchoredObj = &(pVirtObj->GetAnchoredObj());
    }
    else
    {
        assert(dynamic_cast<const SdrVirtObj*>(pSdrObj) == nullptr);
        pRetAnchoredObj = &maAnchoredDrawObj;
    }

    return pRetAnchoredObj;
}

SwAnchoredObject* SwDrawContact::GetAnchoredObj(SdrObject *const pSdrObj)
{
    return const_cast<SwAnchoredObject*>(const_cast<SwDrawContact const*>(this)->GetAnchoredObj(pSdrObj));
}

SdrObject* SwDrawContact::GetMaster()
{
    return !mbMasterObjCleared
           ? maAnchoredDrawObj.DrawObj()
           : nullptr;
}

const SwFrame* SwDrawContact::GetAnchorFrame( const SdrObject* _pDrawObj ) const
{
    const SwFrame* pAnchorFrame = nullptr;
    if ( !_pDrawObj ||
         _pDrawObj == GetMaster() ||
         ( !_pDrawObj->GetUserCall() &&
           GetUserCall( _pDrawObj ) == this ) )
    {
        pAnchorFrame = maAnchoredDrawObj.GetAnchorFrame();
    }
    else
    {
        assert(dynamic_cast<SwDrawVirtObj const*>(_pDrawObj) !=  nullptr);
        pAnchorFrame = static_cast<const SwDrawVirtObj*>(_pDrawObj)->GetAnchorFrame();
    }

    return pAnchorFrame;
}

SwFrame* SwDrawContact::GetAnchorFrame(SdrObject const *const pDrawObj)
{
    return const_cast<SwFrame *>(const_cast<SwDrawContact const*>(this)->GetAnchorFrame(pDrawObj));
}

/** add a 'virtual' drawing object to drawing page.
 */
SwDrawVirtObj* SwDrawContact::AddVirtObj(SwFrame const& rAnchorFrame)
{
    maDrawVirtObjs.push_back(
            new SwDrawVirtObj(
                GetMaster()->getSdrModelFromSdrObject(),
                *GetMaster(),
                *this));
    maDrawVirtObjs.back()->AddToDrawingPage(rAnchorFrame);
    return maDrawVirtObjs.back().get();
}

/// remove 'virtual' drawing objects and destroy them.
void SwDrawContact::RemoveAllVirtObjs()
{
    for(auto& rpDrawVirtObj : maDrawVirtObjs)
    {
        // remove and destroy 'virtual object'
        rpDrawVirtObj->RemoveFromWriterLayout();
        rpDrawVirtObj->RemoveFromDrawingPage();
        // to break the reference cycle
        rpDrawVirtObj->AnchoredObj().ClearDrawObj();
    }
    maDrawVirtObjs.clear();
}


/// get drawing object ('master' or 'virtual') by frame.
SdrObject* SwDrawContact::GetDrawObjectByAnchorFrame( const SwFrame& _rAnchorFrame )
{
    SdrObject* pRetDrawObj = nullptr;

    // #i26791# - compare master frames instead of direct frames
    const SwFrame* pProposedAnchorFrame = &_rAnchorFrame;
    if ( pProposedAnchorFrame->IsContentFrame() )
    {
        const SwContentFrame* pTmpFrame =
                            static_cast<const SwContentFrame*>( pProposedAnchorFrame );
        while ( pTmpFrame->IsFollow() )
        {
            pTmpFrame = pTmpFrame->FindMaster();
        }
        pProposedAnchorFrame = pTmpFrame;
    }

    const SwFrame* pMasterObjAnchorFrame = GetAnchorFrame();
    if ( pMasterObjAnchorFrame && pMasterObjAnchorFrame->IsContentFrame() )
    {
        const SwContentFrame* pTmpFrame =
                            static_cast<const SwContentFrame*>( pMasterObjAnchorFrame );
        while ( pTmpFrame->IsFollow() )
        {
            pTmpFrame = pTmpFrame->FindMaster();
        }
        pMasterObjAnchorFrame = pTmpFrame;
    }

    if ( pMasterObjAnchorFrame && pMasterObjAnchorFrame == pProposedAnchorFrame )
    {
        pRetDrawObj = GetMaster();
    }
    else
    {
        const auto ppFoundVirtObj(std::find_if(maDrawVirtObjs.begin(), maDrawVirtObjs.end(),
                VirtObjAnchoredAtFramePred(pProposedAnchorFrame)));
        if(ppFoundVirtObj != maDrawVirtObjs.end())
            pRetDrawObj = ppFoundVirtObj->get();
    }

    return pRetDrawObj;
}

void SwDrawContact::NotifyBackgroundOfAllVirtObjs(const tools::Rectangle* pOldBoundRect)
{
    for(const auto& rpDrawVirtObj : maDrawVirtObjs)
    {
        SwDrawVirtObj* pDrawVirtObj(rpDrawVirtObj.get());
        if ( pDrawVirtObj->GetAnchorFrame() )
        {
            // #i34640# - determine correct page frame
            SwPageFrame* pPage = pDrawVirtObj->AnchoredObj().FindPageFrameOfAnchor();
            if( pOldBoundRect && pPage )
            {
                SwRect aOldRect( *pOldBoundRect );
                aOldRect.Pos() += pDrawVirtObj->GetOffset();
                if( aOldRect.HasArea() )
                    ::Notify_Background( pDrawVirtObj, pPage,
                                         aOldRect, PrepareHint::FlyFrameLeave,true);
            }
            // #i34640# - include spacing for wrapping
            SwRect aRect( pDrawVirtObj->GetAnchoredObj().GetObjRectWithSpaces() );
            if (aRect.HasArea() && pPage)
            {
                SwPageFrame* pPg = const_cast<SwPageFrame*>(static_cast<const SwPageFrame*>(::FindPage( aRect, pPage )));
                if ( pPg )
                    ::Notify_Background( pDrawVirtObj, pPg, aRect,
                                         PrepareHint::FlyFrameArrive, true );
            }
            ::ClrContourCache( pDrawVirtObj );
        }
    }
}

/// local method to notify the background for a drawing object - #i26791#
static void lcl_NotifyBackgroundOfObj( SwDrawContact const & _rDrawContact,
                                const SdrObject& _rObj,
                                const tools::Rectangle* _pOldObjRect )
{
    // #i34640#
    SwAnchoredObject* pAnchoredObj =
        const_cast<SwAnchoredObject*>(_rDrawContact.GetAnchoredObj( &_rObj ));
    if ( !(pAnchoredObj && pAnchoredObj->GetAnchorFrame()) )
        return;

    // #i34640# - determine correct page frame
    SwPageFrame* pPageFrame = pAnchoredObj->FindPageFrameOfAnchor();
    if( _pOldObjRect && pPageFrame )
    {
        SwRect aOldRect( *_pOldObjRect );
        if( aOldRect.HasArea() )
        {
            // #i34640# - determine correct page frame
            SwPageFrame* pOldPageFrame = const_cast<SwPageFrame*>(static_cast<const SwPageFrame*>(::FindPage( aOldRect, pPageFrame )));
            ::Notify_Background( &_rObj, pOldPageFrame, aOldRect,
                                 PrepareHint::FlyFrameLeave, true);
        }
    }
    // #i34640# - include spacing for wrapping
    SwRect aNewRect( pAnchoredObj->GetObjRectWithSpaces() );
    if( aNewRect.HasArea() && pPageFrame )
    {
        pPageFrame = const_cast<SwPageFrame*>(static_cast<const SwPageFrame*>(::FindPage( aNewRect, pPageFrame )));
        ::Notify_Background( &_rObj, pPageFrame, aNewRect,
                             PrepareHint::FlyFrameArrive, true );
    }
    ClrContourCache( &_rObj );
}

void SwDrawContact::Changed( const SdrObject& rObj,
                             SdrUserCallType eType,
                             const tools::Rectangle& rOldBoundRect )
{
    // #i26791# - no event handling, if existing <SwViewShell>
    // is in construction
    SwDoc& rDoc = GetFormat()->GetDoc();
    if ( rDoc.getIDocumentLayoutAccess().GetCurrentViewShell() &&
         rDoc.getIDocumentLayoutAccess().GetCurrentViewShell()->IsInConstructor() )
    {
        return;
    }

    // #i44339#
    // no event handling, if document is in destruction.
    // Exception: It's the SdrUserCallType::Delete event
    if ( rDoc.IsInDtor() && eType != SdrUserCallType::Delete )
    {
        return;
    }

    //Put on Action, but not if presently anywhere an action runs.
    bool bHasActions(true);
    SwRootFrame *pTmpRoot = rDoc.getIDocumentLayoutAccess().GetCurrentLayout();
    if ( pTmpRoot && pTmpRoot->IsCallbackActionEnabled() )
    {
        SwViewShell* const pSh = rDoc.getIDocumentLayoutAccess().GetCurrentViewShell();
        if ( pSh )
        {
            for(SwViewShell& rShell : pSh->GetRingContainer() )
            {
                if ( rShell.Imp()->IsAction() || rShell.Imp()->IsIdleAction() )
                {
                    bHasActions = true;
                    break;
                }
                bHasActions = false;
            }
        }
        if(!bHasActions)
            pTmpRoot->StartAllAction();
    }
    SdrObjUserCall::Changed( rObj, eType, rOldBoundRect );
    Changed_( rObj, eType, &rOldBoundRect );    //Attention, possibly suicidal!

    if(!bHasActions)
        pTmpRoot->EndAllAction();
}

/// helper class for method <SwDrawContact::Changed_(..)> for handling nested
/// <SdrObjUserCall> events
class NestedUserCallHdl
{
    private:
        SwDrawContact* mpDrawContact;
        bool mbParentUserCallActive;
        SdrUserCallType meParentUserCallEventType;

    public:
        NestedUserCallHdl( SwDrawContact* _pDrawContact,
                           SdrUserCallType _eEventType )
            : mpDrawContact( _pDrawContact ),
              mbParentUserCallActive( _pDrawContact->mbUserCallActive ),
              meParentUserCallEventType( _pDrawContact->meEventTypeOfCurrentUserCall )
        {
            mpDrawContact->mbUserCallActive = true;
            mpDrawContact->meEventTypeOfCurrentUserCall = _eEventType;
        }

        ~NestedUserCallHdl()
        {
            if ( mpDrawContact )
            {
                mpDrawContact->mbUserCallActive = mbParentUserCallActive;
                mpDrawContact->meEventTypeOfCurrentUserCall = meParentUserCallEventType;
            }
        }

        void DrawContactDeleted()
        {
            mpDrawContact = nullptr;
        }

        bool IsNestedUserCall() const
        {
            return mbParentUserCallActive;
        }

        void AssertNestedUserCall()
        {
            if ( !IsNestedUserCall() )
                return;

            bool bTmpAssert( true );
            // Currently its known, that a nested event SdrUserCallType::Resize
            // could occur during parent user call SdrUserCallType::Inserted,
            // SdrUserCallType::Delete and SdrUserCallType::Resize for edge objects.
            // Also possible are nested SdrUserCallType::ChildResize events for
            // edge objects
            // Thus, assert all other combinations
            if ( ( meParentUserCallEventType == SdrUserCallType::Inserted ||
                   meParentUserCallEventType == SdrUserCallType::Delete ||
                   meParentUserCallEventType == SdrUserCallType::Resize ) &&
                 mpDrawContact->meEventTypeOfCurrentUserCall == SdrUserCallType::Resize )
            {
                bTmpAssert = false;
            }
            else if ( meParentUserCallEventType == SdrUserCallType::ChildResize &&
                      mpDrawContact->meEventTypeOfCurrentUserCall == SdrUserCallType::ChildResize )
            {
                bTmpAssert = false;
            }

            if ( bTmpAssert )
            {
                OSL_FAIL( "<SwDrawContact::Changed_(..)> - unknown nested <UserCall> event. This is serious." );
            }
        }
};

/// Notify the format's textbox that it should reconsider its position / size.
static void lcl_textBoxSizeNotify(SwFrameFormat* pFormat)
{
    if (SwTextBoxHelper::isTextBox(pFormat, RES_DRAWFRMFMT))
    {
        // Just notify the textbox that the size has changed, the actual object size is not interesting.
        SfxItemSetFixed<RES_FRM_SIZE, RES_FRM_SIZE> aResizeSet(pFormat->GetDoc().GetAttrPool());
        SwFormatFrameSize aSize;
        aResizeSet.Put(aSize);
        SwTextBoxHelper::syncFlyFrameAttr(*pFormat, aResizeSet, pFormat->FindRealSdrObject());
    }
}

// !!!ATTENTION!!! The object may commit suicide!!!

void SwDrawContact::Changed_( const SdrObject& rObj,
                              SdrUserCallType eType,
                              const tools::Rectangle* pOldBoundRect )
{
    // suppress handling of nested <SdrObjUserCall> events
    NestedUserCallHdl aNestedUserCallHdl( this, eType );
    if ( aNestedUserCallHdl.IsNestedUserCall() )
    {
        aNestedUserCallHdl.AssertNestedUserCall();
        return;
    }
    // do *not* notify, if document is destructing
    // #i35912# - do *not* notify for as-character anchored
    // drawing objects.
    // #i35007#
    // improvement: determine as-character anchored object flag only once.
    const bool bAnchoredAsChar = ObjAnchoredAsChar();
    const bool bNotify = !(GetFormat()->GetDoc().IsInDtor()) &&
                         ( css::text::WrapTextMode_THROUGH != GetFormat()->GetSurround().GetSurround() ) &&
                         !bAnchoredAsChar;
    switch( eType )
    {
        case SdrUserCallType::Delete:
            {
                if ( bNotify )
                {
                    lcl_NotifyBackgroundOfObj( *this, rObj, pOldBoundRect );
                    // --> #i36181# - background of 'virtual'
                    // drawing objects have also been notified.
                    NotifyBackgroundOfAllVirtObjs( pOldBoundRect );
                }
                DisconnectFromLayout( false );
                mbMasterObjCleared = true;
                delete this;
                // --> #i65784# Prevent memory corruption
                aNestedUserCallHdl.DrawContactDeleted();
                break;
            }
        case SdrUserCallType::Inserted:
            {
                if ( mbDisconnectInProgress )
                {
                    OSL_FAIL( "<SwDrawContact::Changed_(..)> - Insert event during disconnection from layout is invalid." );
                }
                else
                {
                    ConnectToLayout();
                    if ( bNotify )
                    {
                        lcl_NotifyBackgroundOfObj( *this, rObj, pOldBoundRect );
                    }
                }
                break;
            }
        case SdrUserCallType::Removed:
            {
                if ( bNotify )
                {
                    lcl_NotifyBackgroundOfObj( *this, rObj, pOldBoundRect );
                }
                DisconnectFromLayout( false );
                break;
            }
        case SdrUserCallType::ChildInserted :
        case SdrUserCallType::ChildRemoved :
        {
            // --> #i113730#
            // force layer of controls for group objects containing control objects
            if(dynamic_cast< SdrObjGroup* >(maAnchoredDrawObj.DrawObj()))
            {
                if(::CheckControlLayer(maAnchoredDrawObj.DrawObj()))
                {
                    const IDocumentDrawModelAccess& rIDDMA = static_cast<SwFrameFormat*>(GetRegisteredInNonConst())->getIDocumentDrawModelAccess();
                    const SdrLayerID aCurrentLayer(maAnchoredDrawObj.DrawObj()->GetLayer());
                    const SdrLayerID aControlLayerID(rIDDMA.GetControlsId());
                    const SdrLayerID aInvisibleControlLayerID(rIDDMA.GetInvisibleControlsId());

                    if(aCurrentLayer != aControlLayerID && aCurrentLayer != aInvisibleControlLayerID)
                    {
                        if ( aCurrentLayer == rIDDMA.GetInvisibleHellId() ||
                             aCurrentLayer == rIDDMA.GetInvisibleHeavenId() )
                        {
                            maAnchoredDrawObj.DrawObj()->SetLayer(aInvisibleControlLayerID);
                        }
                        else
                        {
                            maAnchoredDrawObj.DrawObj()->SetLayer(aControlLayerID);
                        }
                    }
                }
            }
            [[fallthrough]];
        }
        case SdrUserCallType::MoveOnly:
        case SdrUserCallType::Resize:
        case SdrUserCallType::ChildMoveOnly :
        case SdrUserCallType::ChildResize :
        case SdrUserCallType::ChildChangeAttr :
        case SdrUserCallType::ChildDelete :
        {
            // #i31698# - improvement
            // get instance <SwAnchoredDrawObject> only once
            const SwAnchoredDrawObject* pAnchoredDrawObj =
                static_cast<const SwAnchoredDrawObject*>( GetAnchoredObj( &rObj ) );

            /* protect against NULL pointer dereferencing */
            if(!pAnchoredDrawObj)
            {
                break;
            }

            // #i26791# - adjust positioning and alignment attributes,
            // if positioning of drawing object isn't in progress.
            // #i53320# - no adjust of positioning attributes,
            // if drawing object isn't positioned.
            if ( !pAnchoredDrawObj->IsPositioningInProgress() &&
                 !pAnchoredDrawObj->NotYetPositioned() )
            {
                // #i34748# - If no last object rectangle is
                // provided by the anchored object, use parameter <pOldBoundRect>.
                const tools::Rectangle& aOldObjRect = pAnchoredDrawObj->GetLastObjRect()
                                               ? *(pAnchoredDrawObj->GetLastObjRect())
                                               : *pOldBoundRect;
                // #i79400#
                // always invalidate object rectangle inclusive spaces
                pAnchoredDrawObj->InvalidateObjRectWithSpaces();
                // #i41324# - notify background before
                // adjusting position
                if ( bNotify )
                {
                    // #i31573# - correction
                    // background of given drawing object.
                    lcl_NotifyBackgroundOfObj( *this, rObj, &aOldObjRect );
                }
                // #i31698# - determine layout direction
                // via draw frame format.
                SwFrameFormat::tLayoutDir eLayoutDir =
                                pAnchoredDrawObj->GetFrameFormat()->GetLayoutDir();
                // use geometry of drawing object
                tools::Rectangle aObjRect( rObj.GetSnapRect() );
                // If drawing object is a member of a group, the adjustment
                // of the positioning and the alignment attributes has to
                // be done for the top group object.
                if ( rObj.getParentSdrObjectFromSdrObject() )
                {
                    const SdrObject* pGroupObj = rObj.getParentSdrObjectFromSdrObject();
                    while ( pGroupObj->getParentSdrObjectFromSdrObject() )
                    {
                        pGroupObj = pGroupObj->getParentSdrObjectFromSdrObject();
                    }
                    // use geometry of drawing object
                    aObjRect = pGroupObj->GetSnapRect();

                    SwTextBoxHelper::synchronizeGroupTextBoxProperty(&SwTextBoxHelper::changeAnchor, GetFormat(), &const_cast<SdrObject&>(rObj));
                    SwTextBoxHelper::synchronizeGroupTextBoxProperty(&SwTextBoxHelper::syncTextBoxSize, GetFormat(), &const_cast<SdrObject&>(rObj));

                }
                SwTwips nXPosDiff(0);
                SwTwips nYPosDiff(0);
                switch ( eLayoutDir )
                {
                    case SwFrameFormat::HORI_L2R:
                    {
                        nXPosDiff = aObjRect.Left() - aOldObjRect.Left();
                        nYPosDiff = aObjRect.Top() - aOldObjRect.Top();
                    }
                    break;
                    case SwFrameFormat::HORI_R2L:
                    {
                        nXPosDiff = aOldObjRect.Right() - aObjRect.Right();
                        nYPosDiff = aObjRect.Top() - aOldObjRect.Top();
                    }
                    break;
                    case SwFrameFormat::VERT_R2L:
                    {
                        nXPosDiff = aObjRect.Top() - aOldObjRect.Top();
                        nYPosDiff = aOldObjRect.Right() - aObjRect.Right();
                    }
                    break;
                    default:
                    {
                        assert(!"<SwDrawContact::Changed_(..)> - unsupported layout direction");
                    }
                }
                SfxItemSetFixed<RES_VERT_ORIENT, RES_HORI_ORIENT> aSet( GetFormat()->GetDoc().GetAttrPool() );
                const SwFormatVertOrient& rVert = GetFormat()->GetVertOrient();
                if ( nYPosDiff != 0 )
                {
                    if ( rVert.GetRelationOrient() == text::RelOrientation::CHAR ||
                         rVert.GetRelationOrient() == text::RelOrientation::TEXT_LINE )
                    {
                        nYPosDiff = -nYPosDiff;
                    }
                    aSet.Put( SwFormatVertOrient( rVert.GetPos()+nYPosDiff,
                                               text::VertOrientation::NONE,
                                               rVert.GetRelationOrient() ) );
                }

                const SwFormatHoriOrient& rHori = GetFormat()->GetHoriOrient();
                if ( !bAnchoredAsChar && nXPosDiff != 0 )
                {
                    aSet.Put( SwFormatHoriOrient( rHori.GetPos()+nXPosDiff,
                                               text::HoriOrientation::NONE,
                                               rHori.GetRelationOrient() ) );
                }

                if ( nYPosDiff ||
                     ( !bAnchoredAsChar && nXPosDiff != 0 ) )
                {
                    GetFormat()->GetDoc().SetFlyFrameAttr( *(GetFormat()), aSet );
                    // keep new object rectangle, to avoid multiple
                    // changes of the attributes by multiple event from
                    // the drawing layer - e.g. group objects and its members
                    // #i34748# - use new method
                    // <SwAnchoredDrawObject::SetLastObjRect(..)>.
                    const_cast<SwAnchoredDrawObject*>(pAnchoredDrawObj)
                                    ->SetLastObjRect( aObjRect );
                }
                else if ( aObjRect.GetSize() != aOldObjRect.GetSize() )
                {
                    InvalidateObjs_();
                    // #i35007# - notify anchor frame
                    // of as-character anchored object
                    if ( bAnchoredAsChar )
                    {
                        SwFrame* pAnchorFrame = const_cast<SwAnchoredDrawObject*>(pAnchoredDrawObj)->AnchorFrame();
                        if(pAnchorFrame)
                        {
                            pAnchorFrame->Prepare( PrepareHint::FlyFrameAttributesChanged, GetFormat() );
                        }
                    }

                    lcl_textBoxSizeNotify(GetFormat());
                }
                else if (eType == SdrUserCallType::Resize)
                    // Even if the bounding box of the shape didn't change,
                    // notify about the size change, as an adjustment change
                    // may affect the size of the underlying textbox.
                    lcl_textBoxSizeNotify(GetFormat());
            }

            // tdf#135198: keep text box together with its shape
            const SwPageFrame* rPageFrame = pAnchoredDrawObj->GetPageFrame();
            if (rPageFrame && rPageFrame->isFrameAreaPositionValid() && GetFormat()
                && GetFormat()->GetOtherTextBoxFormats())
            {
                SwDoc& rDoc = GetFormat()->GetDoc();

                // avoid Undo creation
                ::sw::UndoGuard const ug(rDoc.GetIDocumentUndoRedo());

                // hide any artificial "changes" made by synchronizing the textbox position
                const bool bEnableSetModified = rDoc.getIDocumentState().IsEnableSetModified();
                rDoc.getIDocumentState().SetEnableSetModified(false);

                SfxItemSetFixed<RES_VERT_ORIENT, RES_HORI_ORIENT, RES_ANCHOR, RES_ANCHOR>
                    aSyncSet( rDoc.GetAttrPool() );
                aSyncSet.Put(GetFormat()->GetHoriOrient());
                bool bRelToTableCell(false);
                aSyncSet.Put(SwFormatVertOrient(pAnchoredDrawObj->GetRelPosToPageFrame(false, bRelToTableCell).getY(),
                                                text::VertOrientation::NONE,
                                                text::RelOrientation::PAGE_FRAME));
                aSyncSet.Put(SwFormatAnchor(RndStdIds::FLY_AT_PAGE, rPageFrame->GetPhyPageNum()));

                auto pSdrObj = const_cast<SdrObject*>(&rObj);
                if (pSdrObj != GetFormat()->FindRealSdrObject())
                {
                    SfxItemSetFixed<RES_FRM_SIZE, RES_FRM_SIZE>  aSet( rDoc.GetAttrPool() );

                    aSet.Put(aSyncSet);
                    aSet.Put(pSdrObj->GetMergedItem(RES_FRM_SIZE));
                    SwTextBoxHelper::syncFlyFrameAttr(*GetFormat(), aSet, pSdrObj);

                    SwTextBoxHelper::synchronizeGroupTextBoxProperty(
                        &SwTextBoxHelper::changeAnchor, GetFormat(),
                        GetFormat()->FindRealSdrObject());
                    SwTextBoxHelper::synchronizeGroupTextBoxProperty(
                        &SwTextBoxHelper::syncTextBoxSize, GetFormat(),
                        GetFormat()->FindRealSdrObject());
                }
                else
                    SwTextBoxHelper::syncFlyFrameAttr(*GetFormat(), aSyncSet, GetFormat()->FindRealSdrObject());

                rDoc.getIDocumentState().SetEnableSetModified(bEnableSetModified);
            }
        }
        break;
        case SdrUserCallType::ChangeAttr:
            if ( bNotify )
            {
                lcl_NotifyBackgroundOfObj( *this, rObj, pOldBoundRect );
            }
            break;
        default:
            break;
    }
}

namespace
{
    const SwFormatAnchor* lcl_getAnchorFormat( const SfxPoolItem& _rItem )
    {
        sal_uInt16 nWhich = _rItem.Which();
        const SwFormatAnchor* pAnchorFormat = nullptr;
        if ( RES_ANCHOR == nWhich )
        {
            pAnchorFormat = &static_cast<const SwFormatAnchor&>(_rItem);
        }
        return pAnchorFormat;
    }
    const SwFormatAnchor* lcl_getAnchorFormat( const SwAttrSetChg& _rItem )
    {
        return _rItem.GetChgSet()->GetItemIfSet( RES_ANCHOR, false );
    }
}

void SwDrawContact::SwClientNotify(const SwModify& rMod, const SfxHint& rHint)
{
    SwClient::SwClientNotify(rMod, rHint); // needed as SwContact::SwClientNotify doesn't explicitly call SwClient::SwClientNotify
    SwContact::SwClientNotify(rMod, rHint);
    if(SfxHintId::SwRemoveUnoObject == rHint.GetId())
    {
        // nothing to do
        // #i51474#
        GetAnchoredObj(nullptr)->ResetLayoutProcessBools();
    }
    else if(SfxHintId::SwFormatChange == rHint.GetId()
            || SfxHintId::SwUpdateAttr == rHint.GetId())
    {
        // #i51474#
        GetAnchoredObj(nullptr)->ResetLayoutProcessBools();
    }
    else if (rHint.GetId() == SfxHintId::SwLegacyModify
            || rHint.GetId() == SfxHintId::SwAttrSetChange
            || rHint.GetId() == SfxHintId::SwObjectDying)
    {
        SAL_WARN_IF(mbDisconnectInProgress, "sw.core", "<SwDrawContact::Modify(..)> called during disconnection.");

        const SwFormatAnchor* pNewAnchorFormat = nullptr;
        const SwFormatAnchor* pOldAnchorFormat = nullptr;
        if (rHint.GetId() == SfxHintId::SwLegacyModify)
        {
            auto pLegacyHint = static_cast<const sw::LegacyModifyHint*>(&rHint);
            if (pLegacyHint->m_pNew)
                pNewAnchorFormat = lcl_getAnchorFormat(*pLegacyHint->m_pNew);
            if (pLegacyHint->m_pOld)
                pOldAnchorFormat = lcl_getAnchorFormat(*pLegacyHint->m_pOld);
        }
        else if (rHint.GetId() == SfxHintId::SwAttrSetChange)
        {
            auto pChangeHint = static_cast<const sw::AttrSetChangeHint*>(&rHint);
            if (pChangeHint->m_pNew)
                pNewAnchorFormat = lcl_getAnchorFormat(*pChangeHint->m_pNew);
            if (pChangeHint->m_pOld)
                pOldAnchorFormat = lcl_getAnchorFormat(*pChangeHint->m_pOld);
        }

        if(pNewAnchorFormat)
        {
            // Do not respond to a Reset Anchor!
            if(GetFormat()->GetAttrSet().GetItemState(RES_ANCHOR, false) == SfxItemState::SET)
            {
                // no connect to layout during disconnection
                if(!mbDisconnectInProgress)
                {
                    // determine old object rectangle of 'master' drawing object
                    // for notification
                    const tools::Rectangle* pOldRect = nullptr;
                    tools::Rectangle aOldRect;
                    if(GetAnchorFrame())
                    {
                        // --> #i36181# - include spacing in object
                        // rectangle for notification.
                        aOldRect = maAnchoredDrawObj.GetObjRectWithSpaces().SVRect();
                        pOldRect = &aOldRect;
                    }
                    // re-connect to layout due to anchor format change
                    ConnectToLayout(pNewAnchorFormat);
                    // notify background of drawing objects
                    lcl_NotifyBackgroundOfObj(*this, *GetMaster(), pOldRect);
                    NotifyBackgroundOfAllVirtObjs(pOldRect);

                    if(!pOldAnchorFormat || (pOldAnchorFormat->GetAnchorId() != pNewAnchorFormat->GetAnchorId()))
                    {
                        if(maAnchoredDrawObj.DrawObj())
                        {
                            // --> #i102752#
                            // assure that a ShapePropertyChangeNotifier exists
                            maAnchoredDrawObj.DrawObj()->notifyShapePropertyChange(u"AnchorType"_ustr);
                        }
                        else
                            SAL_WARN("sw.core", "SwDrawContact::Modify: no draw object here?");
                    }
                }
            }
            else
                DisconnectFromLayout();
        }
        // --> #i62875# - no further notification, if not connected to Writer layout
        else if ( maAnchoredDrawObj.GetAnchorFrame() &&
                  maAnchoredDrawObj.GetDrawObj()->GetUserCall() )
        {
            bool bUpdateSortedObjsList(false);
            if (rHint.GetId() == SfxHintId::SwLegacyModify)
            {
                auto pLegacyHint = static_cast<const sw::LegacyModifyHint*>(&rHint);
                sal_uInt16 nWhich = pLegacyHint->m_pNew ? pLegacyHint->m_pNew->Which() : 0;
                switch(nWhich)
                {
                    case RES_UL_SPACE:
                    case RES_LR_SPACE:
                    case RES_HORI_ORIENT:
                    case RES_VERT_ORIENT:
                    case RES_FOLLOW_TEXT_FLOW: // #i28701# - add attribute 'Follow text flow'
                        break;
                    case RES_SURROUND:
                    case RES_OPAQUE:
                    case RES_WRAP_INFLUENCE_ON_OBJPOS:
                        // --> #i28701# - on change of wrapping style, hell|heaven layer,
                        // or wrapping style influence an update of the <SwSortedObjs> list,
                        // the drawing object is registered in, has to be performed. This is triggered
                        // by the 1st parameter of method call <InvalidateObjs_(..)>.
                        bUpdateSortedObjsList = true;
                        break;
                    default:
                        assert(!"<SwDraw Contact::Modify(..)> - unhandled attribute?");
                }
            }
            else if (rHint.GetId() == SfxHintId::SwAttrSetChange)
            {
                // #i35443#
                auto pChangeHint = static_cast<const sw::AttrSetChangeHint*>(&rHint);
                auto pChgSet = pChangeHint->m_pNew ? pChangeHint->m_pNew->GetChgSet() : nullptr;
                if(pChgSet && (pChgSet->GetItemState(RES_SURROUND, false) == SfxItemState::SET ||
                        pChgSet->GetItemState(RES_OPAQUE, false) == SfxItemState::SET ||
                        pChgSet->GetItemState(RES_WRAP_INFLUENCE_ON_OBJPOS, false) == SfxItemState::SET))
                    bUpdateSortedObjsList = true;
            }
            lcl_NotifyBackgroundOfObj(*this, *GetMaster(), nullptr);
            NotifyBackgroundOfAllVirtObjs(nullptr);
            InvalidateObjs_(bUpdateSortedObjsList);
        }

        // #i51474#
        GetAnchoredObj(nullptr)->ResetLayoutProcessBools();
    }
    else if (rHint.GetId() == SfxHintId::SwDrawFrameFormat)
    {
        auto pDrawFrameFormatHint = static_cast<const sw::DrawFrameFormatHint*>(&rHint);
        switch(pDrawFrameFormatHint->m_eId)
        {
            case sw::DrawFrameFormatHintId::DYING:
                delete this;
                break;
            case sw::DrawFrameFormatHintId::PREPPASTING:
                MoveObjToVisibleLayer(GetMaster());
                break;
            case sw::DrawFrameFormatHintId::PREP_INSERT_FLY:
                InsertMasterIntoDrawPage();
                // #i40845# - follow-up of #i35635#
                // move object to visible layer
                MoveObjToVisibleLayer(GetMaster());
                // tdf#135661 InsertMasterIntoDrawPage may have created a new
                // SwXShape with null m_pFormat; fix that
                SwXShape::AddExistingShapeToFormat(*GetMaster());
                break;
            case sw::DrawFrameFormatHintId::PREP_DELETE_FLY:
                RemoveMasterFromDrawPage();
                break;
            case sw::DrawFrameFormatHintId::PAGE_OUT_OF_BOUNDS:
            case sw::DrawFrameFormatHintId::DELETE_FRAMES:
                DisconnectFromLayout();
                break;
            case sw::DrawFrameFormatHintId::MAKE_FRAMES:
                 ConnectToLayout();
                 break;
            case sw::DrawFrameFormatHintId::POST_RESTORE_FLY_ANCHOR:
                GetAnchoredObj(GetMaster())->MakeObjPos();
                break;
            default:
                ;
        }
    }
    else if (rHint.GetId() == SfxHintId::SwCheckDrawFrameFormatLayer)
    {
        auto pCheckDrawFrameFormatLayerHint = static_cast<const sw::CheckDrawFrameFormatLayerHint*>(&rHint);
        *(pCheckDrawFrameFormatLayerHint->m_bCheckControlLayer) |= (GetMaster() && CheckControlLayer(GetMaster()));
    }
    else if (rHint.GetId() == SfxHintId::SwContactChanged)
    {
        auto pContactChangedHint = static_cast<const sw::ContactChangedHint*>(&rHint);
        if(!*pContactChangedHint->m_ppObject)
            *pContactChangedHint->m_ppObject = GetMaster();
        auto pObject = *pContactChangedHint->m_ppObject;
        Changed(*pObject, SdrUserCallType::Delete, pObject->GetLastBoundRect());
    }
    else if (rHint.GetId() == SfxHintId::SwDrawFormatLayoutCopy)
    {
        auto pDrawFormatLayoutCopyHint = static_cast<const sw::DrawFormatLayoutCopyHint*>(&rHint);
        const SwDrawFrameFormat& rFormat = static_cast<const SwDrawFrameFormat&>(rMod);
        rtl::Reference<SdrObject> xNewObj =
                pDrawFormatLayoutCopyHint->m_rDestDoc.CloneSdrObj(
                        *GetMaster(),
                        pDrawFormatLayoutCopyHint->m_rDestDoc.IsCopyIsMove() && &pDrawFormatLayoutCopyHint->m_rDestDoc == &rFormat.GetDoc());
        new SwDrawContact(
                &pDrawFormatLayoutCopyHint->m_rDestFormat, xNewObj.get() );
        // #i49730# - notify draw frame format that position attributes are
        // already set, if the position attributes are already set at the
        // source draw frame format.
        if(rFormat.IsPosAttrSet())
            pDrawFormatLayoutCopyHint->m_rDestFormat.PosAttrSet();
    }
    else if (rHint.GetId() == SfxHintId::SwRestoreFlyAnchor)
    {
        auto pRestoreFlyAnchorHint = static_cast<const sw::RestoreFlyAnchorHint*>(&rHint);
        SdrObject* pObj = GetMaster();
        if(GetAnchorFrame() && !pObj->IsInserted())
        {
            auto pDrawModel = const_cast<SwDrawFrameFormat&>(static_cast<const SwDrawFrameFormat&&gt;(rMod)).GetDoc().getIDocumentDrawModelAccess().GetDrawModel();
            assert(pDrawModel);
            pDrawModel->GetPage(0)->InsertObject(pObj);
        }
        pObj->SetRelativePos(pRestoreFlyAnchorHint->m_aPos);
    }
    else if (rHint.GetId() == SfxHintId::SwCreatePortion)
    {
        auto pCreatePortionHint = static_cast<const sw::CreatePortionHint*>(&rHint);
        if(*pCreatePortionHint->m_ppContact)
            return;
        *pCreatePortionHint->m_ppContact = this; // This is kind of ridiculous: the FrameFormat doesn't even hold a pointer to the contact itself,  but here we are leaking it out randomly
        if(!GetAnchorFrame())
        {
            // No direct positioning needed any more
            ConnectToLayout();
            // Move object to visible layer
            MoveObjToVisibleLayer(GetMaster());
        }
    }
    else if (rHint.GetId() == SfxHintId::SwCollectTextObjects)
    {
        auto pCollectTextObjectsHint = static_cast<const sw::CollectTextObjectsHint*>(&rHint);
        auto pSdrO = GetMaster();
        if(!pSdrO)
            return;
        if(dynamic_cast<const SdrObjGroup*>(pSdrO))
        {
            SdrObjListIter aListIter(*pSdrO, SdrIterMode::DeepNoGroups);
            //iterate inside of a grouped object
            while(aListIter.IsMore())
            {
                SdrTextObj* pTextObj = DynCastSdrTextObj(aListIter.Next());
                if(pTextObj && pTextObj->HasText())
                    pCollectTextObjectsHint->m_rTextObjects.push_back(pTextObj);
            }
        }
        else if(SdrTextObj* pTextObj = DynCastSdrTextObj(pSdrO))
        {
            if(pTextObj->HasText())
                pCollectTextObjectsHint->m_rTextObjects.push_back(pTextObj);
        }
    }
    else if (rHint.GetId() == SfxHintId::SwGetZOrder)
    {
        auto pGetZOrdnerHint = static_cast<const sw::GetZOrderHint*>(&rHint);
        auto pFormat(dynamic_cast<const SwFrameFormat*>(&rMod));
        if (pFormat && pFormat->Which() == RES_DRAWFRMFMT)
            pGetZOrdnerHint->m_rnZOrder = GetMaster()->GetOrdNum();
    }
    else if (rHint.GetId() == SfxHintId::SwGetObjectConnected)
    {
        auto pConnectedHint = static_cast<const sw::GetObjectConnectedHint*>(&rHint);
        pConnectedHint->m_risConnected |= (GetAnchorFrame() != nullptr);
    }
}

// #i26791#
// #i28701# - added parameter <_bUpdateSortedObjsList>
void SwDrawContact::InvalidateObjs_( const bool _bUpdateSortedObjsList )
{
    for(const auto& rpDrawVirtObj : maDrawVirtObjs)
    // invalidate position of existing 'virtual' drawing objects
    {
        SwDrawVirtObj* pDrawVirtObj(rpDrawVirtObj.get());
        // #i33313# - invalidation only for connected
        // 'virtual' drawing objects
        if ( pDrawVirtObj->IsConnected() )
        {
            pDrawVirtObj->AnchoredObj().InvalidateObjPos();
            // #i28701#
            if ( _bUpdateSortedObjsList )
            {
                pDrawVirtObj->AnchoredObj().UpdateObjInSortedList();
            }
        }
    }

    // invalidate position of 'master' drawing object
    SwAnchoredObject* pAnchoredObj = GetAnchoredObj( nullptr );
    pAnchoredObj->InvalidateObjPos();
    // #i28701#
    if ( _bUpdateSortedObjsList )
    {
        pAnchoredObj->UpdateObjInSortedList();
    }
}

void SwDrawContact::DisconnectFromLayout( bool _bMoveMasterToInvisibleLayer )
{
    mbDisconnectInProgress = true;

    // --> #i36181# - notify background of drawing object
    if ( _bMoveMasterToInvisibleLayer &&
         !(GetFormat()->GetDoc().IsInDtor()) &&
         GetAnchorFrame() && !GetAnchorFrame()->IsInDtor() )
    {
        const tools::Rectangle aOldRect( maAnchoredDrawObj.GetObjRectWithSpaces().SVRect() );
        lcl_NotifyBackgroundOfObj( *this, *GetMaster(), &aOldRect );
        NotifyBackgroundOfAllVirtObjs( &aOldRect );
    }

    // remove 'virtual' drawing objects from writer
    // layout and from drawing page
    for(auto& rpVirtDrawObj : maDrawVirtObjs)
    {
        rpVirtDrawObj->RemoveFromWriterLayout();
        rpVirtDrawObj->RemoveFromDrawingPage();
    }

    if ( maAnchoredDrawObj.GetAnchorFrame() )
    {
        maAnchoredDrawObj.AnchorFrame()->RemoveDrawObj( maAnchoredDrawObj );
    }

    if ( _bMoveMasterToInvisibleLayer && GetMaster() && GetMaster()->IsInserted() )
    {
        SdrViewIter::ForAllViews( GetMaster(),
            [this] (SdrView* pView)
            {
                pView->MarkObj( GetMaster(), pView->GetSdrPageView(), true );
            });

        // Instead of removing 'master' object from drawing page, move the
        // 'master' drawing object into the corresponding invisible layer.
        {
            //static_cast<SwFrameFormat*>(GetRegisteredIn())->getIDocumentDrawModelAccess()->GetDrawModel()->GetPage(0)->
            //                            RemoveObject( GetMaster()->GetOrdNum() );
            // #i18447# - in order to consider group object correct
            // use new method <SwDrawContact::MoveObjToInvisibleLayer(..)>
            MoveObjToInvisibleLayer( GetMaster() );
        }
    }

    mbDisconnectInProgress = false;
}

/// method to remove 'master' drawing object from drawing page.
void SwDrawContact::RemoveMasterFromDrawPage()
{
    if ( GetMaster() )
    {
        GetMaster()->SetUserCall( nullptr );
        if ( GetMaster()->IsInserted() )
        {
            static_cast<SwFrameFormat*>(GetRegisteredIn())->getIDocumentDrawModelAccess().GetDrawModel()->GetPage(0)->
                                        RemoveObject( GetMaster()->GetOrdNum() );
        }
    }
}

// disconnect for a dedicated drawing object - could be 'master' or 'virtual'.
// a 'master' drawing object will disconnect a 'virtual' drawing object
// in order to take its place.
// #i19919# - no special case, if drawing object isn't in
// page header/footer, in order to get drawing objects in repeating table headers
// also working.
void SwDrawContact::DisconnectObjFromLayout( SdrObject* _pDrawObj )
{
    if ( auto pSwDrawVirtObj = dynamic_cast<SwDrawVirtObj*>( _pDrawObj) )
    {
        pSwDrawVirtObj->RemoveFromWriterLayout();
        pSwDrawVirtObj->RemoveFromDrawingPage();
    }
    else
    {
        const auto ppVirtDrawObj(std::find_if(maDrawVirtObjs.begin(), maDrawVirtObjs.end(),
                [] (const rtl::Reference<SwDrawVirtObj>& pObj) { return pObj->IsConnected(); }));

        if(ppVirtDrawObj != maDrawVirtObjs.end())
        {
            // replace found 'virtual' drawing object by 'master' drawing
            // object and disconnect the 'virtual' one
            SwDrawVirtObj* pDrawVirtObj(ppVirtDrawObj->get());
            SwFrame* pNewAnchorFrameOfMaster = pDrawVirtObj->AnchorFrame();
            // disconnect 'virtual' drawing object
            pDrawVirtObj->RemoveFromWriterLayout();
            pDrawVirtObj->RemoveFromDrawingPage();
            // disconnect 'master' drawing object from current frame
            GetAnchorFrame()->RemoveDrawObj( maAnchoredDrawObj );
            // re-connect 'master' drawing object to frame of found 'virtual'
            // drawing object.
            pNewAnchorFrameOfMaster->AppendDrawObj( maAnchoredDrawObj );
        }
        else
        {
            // no connected 'virtual' drawing object found. Thus, disconnect
            // completely from layout.
            DisconnectFromLayout();
        }
    }
}

static SwTextFrame* lcl_GetFlyInContentAnchor( SwTextFrame* _pProposedAnchorFrame,
                                   SwPosition const& rAnchorPos)
{
    SwTextFrame* pAct = _pProposedAnchorFrame;
    SwTextFrame* pTmp;
    TextFrameIndex const nTextOffset(_pProposedAnchorFrame->MapModelToViewPos(rAnchorPos));
    do
    {
        pTmp = pAct;
        pAct = pTmp->GetFollow();
    }
    while (pAct && nTextOffset >= pAct->GetOffset());
    return pTmp;
}

void SwDrawContact::ConnectToLayout( const SwFormatAnchor* pAnch )
{
    // *no* connect to layout during disconnection from layout.
    if ( mbDisconnectInProgress )
    {
        OSL_FAIL( "<SwDrawContact::ConnectToLayout(..)> called during disconnection.");
        return;
    }

    // --> #i33909# - *no* connect to layout, if 'master' drawing
    // object isn't inserted in the drawing page
    if ( !GetMaster()->IsInserted() )
    {
        OSL_FAIL( "<SwDrawContact::ConnectToLayout(..)> - master drawing object not inserted -> no connect to layout. Please inform od@openoffice.org" );
        return;
    }

    SwFrameFormat* pDrawFrameFormat = static_cast<SwFrameFormat*>(GetRegisteredIn());

    if( !pDrawFrameFormat->getIDocumentLayoutAccess().GetCurrentViewShell() )
        return;

    // remove 'virtual' drawing objects from writer
    // layout and from drawing page, and remove 'master' drawing object from
    // writer layout - 'master' object will remain in drawing page.
    DisconnectFromLayout( false );

    if ( !pAnch )
    {
        pAnch = &(pDrawFrameFormat->GetAnchor());
    }

    switch ( pAnch->GetAnchorId() )
    {
        case RndStdIds::FLY_AT_PAGE:
                {
                sal_uInt16 nPgNum = pAnch->GetPageNum();
                SwViewShell *pShell = pDrawFrameFormat->getIDocumentLayoutAccess().GetCurrentViewShell();
                if( !pShell )
                    break;
                SwRootFrame* pRoot = pShell->GetLayout();
                SwPageFrame *pPage = static_cast<SwPageFrame*>(pRoot->Lower());

                for ( sal_uInt16 i = 1; i < nPgNum && pPage; ++i )
                {
                    pPage = static_cast<SwPageFrame*>(pPage->GetNext());
                }

                if ( pPage )
                {
                    pPage->AppendDrawObj( maAnchoredDrawObj );
                }
                else
                    //Looks stupid but is allowed (compare SwFEShell::SetPageObjsNewPage)
                    pRoot->SetAssertFlyPages();
                }
                break;

        case RndStdIds::FLY_AT_CHAR:
        case RndStdIds::FLY_AT_PARA:
        case RndStdIds::FLY_AT_FLY:
        case RndStdIds::FLY_AS_CHAR:
            {
                if ( pAnch->GetAnchorId() == RndStdIds::FLY_AS_CHAR )
                {
                    ClrContourCache( GetMaster() );
                }
                // support drawing objects in header/footer,
                // but not control objects:
                // anchor at first found frame the 'master' object and
                // at the following frames 'virtual' drawing objects.
                // Note: method is similar to <SwFlyFrameFormat::MakeFrames(..)>
                sw::BroadcastingModify *pModify = nullptr;
                if( pAnch->GetAnchorNode() )
                {
                    if ( pAnch->GetAnchorId() == RndStdIds::FLY_AT_FLY )
                    {
                        SwNodeIndex aIdx( *pAnch->GetAnchorNode() );
                        SwContentNode* pCNd = SwNodes::GoNext(&aIdx);
                        if (SwIterator<SwFrame, SwContentNode, sw::IteratorMode::UnwrapMulti>(*pCNd).First())
                            pModify = pCNd;
                        else
                        {
                            const SwNode& rIdx = *pAnch->GetAnchorNode();
                            for(sw::SpzFrameFormat* pFlyFormat :*(pDrawFrameFormat->GetDoc().GetSpzFrameFormats()))
                            {
                                if( pFlyFormat->GetContent().GetContentIdx() &&
                                    rIdx == pFlyFormat->GetContent().GetContentIdx()->GetNode() )
                                {
                                    pModify = pFlyFormat;
                                    break;
                                }
                            }
                        }
                    }
                    else
                    {
                        pModify = pAnch->GetAnchorNode()->GetContentNode();
                    }
                }

                // #i29199# - It is possible, that
                // the anchor doesn't exist - E.g., reordering the
                // sub-documents in a master document.
                // Note: The anchor will be inserted later.
                if ( !pModify )
                {
                    // break to end of the current switch case.
                    break;
                }

                SwIterator<SwFrame, sw::BroadcastingModify, sw::IteratorMode::UnwrapMulti> aIter(*pModify);
                SwFrame* pAnchorFrameOfMaster = nullptr;
                for( SwFrame *pFrame = aIter.First(); pFrame; pFrame = aIter.Next() )
                {
                    // append drawing object, if
                    // (1) proposed anchor frame isn't a follow and...
                    const bool bFollow = pFrame->IsContentFrame() && static_cast<SwContentFrame*>(pFrame)->IsFollow();
                    if (bFollow)
                        continue;

                    // (2) drawing object isn't a control object to be anchored
                    //     in header/footer.
                    const bool bControlInHF = ::CheckControlLayer(GetMaster()) && pFrame->FindFooterOrHeader();
                    // tdf#129542 but make an exception for control objects so they can get added to just the first frame,
                    // the Master Anchor Frame and not the others
                    if (bControlInHF && pAnchorFrameOfMaster)
                        continue;

                    bool bAdd;
                    if (RndStdIds::FLY_AT_FLY == pAnch->GetAnchorId())
                        bAdd = true;
                    else
                    {
                        assert(pFrame->IsTextFrame());
                        bAdd = IsAnchoredObjShown(*static_cast<SwTextFrame*>(pFrame), *pAnch);
                    }

                    if( bAdd )
                    {
                        if ( RndStdIds::FLY_AT_FLY == pAnch->GetAnchorId() && !pFrame->IsFlyFrame() )
                        {
                            pFrame = pFrame->FindFlyFrame();
                            assert(pFrame);
                        }

                        // find correct follow for as character anchored objects
                        if ((pAnch->GetAnchorId() == RndStdIds::FLY_AS_CHAR) &&
                             pFrame->IsTextFrame() )
                        {
                            pFrame = lcl_GetFlyInContentAnchor(
                                        static_cast<SwTextFrame*>(pFrame),
                                        *pAnch->GetContentAnchor());
                        }

                        if ( !pAnchorFrameOfMaster )
                        {
                            // append 'master' drawing object
                            pAnchorFrameOfMaster = pFrame;

                            const SwFrameFormat* pFlyFormat = nullptr;
                            if (!maAnchoredDrawObj.GetDrawObj()->IsGroupObject())
                            {
                                pFlyFormat = SwTextBoxHelper::getOtherTextBoxFormat(GetFormat(), RES_DRAWFRMFMT);
                            }

                            if (pFlyFormat)
                            {
                                // This is a master draw object and it has an associated fly format.
                                // See if a fly frame is already inserted to the layout: if so, this
                                // master draw object should be ordered directly before the fly one.
                                if (const SwSortedObjs* pObjs = pFrame->GetDrawObjs())
                                {
                                    for (const SwAnchoredObject* pAnchoredObj : *pObjs)
                                    {
                                        if (pAnchoredObj->GetFrameFormat() == pFlyFormat)
                                        {
                                            SdrPage* pDrawPage = pAnchoredObj->GetDrawObj()->getSdrPageFromSdrObject();
                                            if (pDrawPage)
                                            {
                                                sal_uInt32 nOrdNum = pAnchoredObj->GetDrawObj()->GetOrdNum();
                                                if (maAnchoredDrawObj.GetDrawObj()->GetOrdNum() >= nOrdNum)
                                                {
                                                    pDrawPage->SetObjectOrdNum(maAnchoredDrawObj.GetDrawObj()->GetOrdNumDirect(), nOrdNum);
                                                }
                                                else
                                                {
                                                    pDrawPage->SetObjectOrdNum(nOrdNum, maAnchoredDrawObj.GetDrawObj()->GetOrdNumDirect() + 1);
                                                }
                                                break;
                                            }
                                        }
                                    }
                                }
                            }

                            pFrame->AppendDrawObj( maAnchoredDrawObj );
                        }
                        else
                        {
                            // append 'virtual' drawing object
                            SwDrawVirtObj* pDrawVirtObj = AddVirtObj(*pFrame);
                            if ( pAnch->GetAnchorId() == RndStdIds::FLY_AS_CHAR )
                            {
                                ClrContourCache( pDrawVirtObj );
                            }
                            pFrame->AppendDrawObj( pDrawVirtObj->AnchoredObj() );

                            pDrawVirtObj->ActionChanged();
                        }

                        if ( pAnch->GetAnchorId() == RndStdIds::FLY_AS_CHAR )
                        {
                            pFrame->InvalidatePrt();
                        }
                    }
                }
            }
            break;
        default:
            assert(!"Unknown Anchor.");
            break;
    }
    if ( GetAnchorFrame() )
    {
        ::setContextWritingMode( maAnchoredDrawObj.DrawObj(), GetAnchorFrame() );
        // #i26791# - invalidate objects instead of direct positioning
        InvalidateObjs_();
    }
}

/// insert 'master' drawing object into drawing page
void SwDrawContact::InsertMasterIntoDrawPage()
{
    if ( !GetMaster()->IsInserted() )
    {
        GetFormat()->getIDocumentDrawModelAccess().GetDrawModel()->GetPage(0)
                ->InsertObject( GetMaster(), GetMaster()->GetOrdNumDirect() );
    }
    GetMaster()->SetUserCall( this );
}

SwPageFrame* SwDrawContact::FindPage( const SwRect &rRect )
{
    // --> #i28701# - use method <GetPageFrame()>
    SwPageFrame* pPg = GetPageFrame();
    if ( !pPg && GetAnchorFrame() )
        pPg = GetAnchorFrame()->FindPageFrame();
    if ( pPg )
        pPg = const_cast<SwPageFrame*>(static_cast<const SwPageFrame*>(::FindPage( rRect, pPg )));
    return pPg;
}

void SwDrawContact::ChkPage()
{
    if ( mbDisconnectInProgress )
    {
        OSL_FAIL( "<SwDrawContact::ChkPage()> called during disconnection." );
        return;
    }

    // --> #i28701#
    // tdf#156287: use anchor page, not current bound rectangle's page,
    // because an object can't move to a page other than its anchor anyway
    SwPageFrame* pPg = ( maAnchoredDrawObj.GetAnchorFrame() &&
                       maAnchoredDrawObj.GetAnchorFrame()->IsPageFrame() )
                     ? GetPageFrame()
                     : maAnchoredDrawObj.FindPageFrameOfAnchor();
    if ( GetPageFrame() == pPg )
        return;

    // if drawing object is anchor in header/footer a change of the page
    // is a dramatic change. Thus, completely re-connect to the layout
    if ( maAnchoredDrawObj.GetAnchorFrame() &&
         maAnchoredDrawObj.GetAnchorFrame()->FindFooterOrHeader() )
    {
        ConnectToLayout();
    }
    else
    {
        // --> #i28701# - use methods <GetPageFrame()> and <SetPageFrame>
        maAnchoredDrawObj.RegisterAtPage(*pPg);
        maAnchoredDrawObj.SetPageFrame( pPg );
    }
}

// Important note:
// method is called by method <SwDPage::ReplaceObject(..)>, which called its
// corresponding superclass method <FmFormPage::ReplaceObject(..)>.
// Note: 'master' drawing object *has* to be connected to layout triggered
//       by the caller of this, if method is called.
void SwDrawContact::ChangeMasterObject(SdrObject* pNewMaster)
{
    DisconnectFromLayout( false );
    // consider 'virtual' drawing objects
    RemoveAllVirtObjs();

    GetMaster()->SetUserCall( nullptr );
    if(pNewMaster)
        maAnchoredDrawObj.SetDrawObj(*pNewMaster);
    else
        mbMasterObjCleared = true;
    GetMaster()->SetUserCall( this );

    InvalidateObjs_();
}

/// get data collection of anchored objects, handled by with contact
void SwDrawContact::GetAnchoredObjs(std::vector<SwAnchoredObject*>& o_rAnchoredObjs) const
{
    o_rAnchoredObjs.push_back(const_cast<SwAnchoredDrawObject*>(&maAnchoredDrawObj));

    for(auto& rpDrawVirtObj : maDrawVirtObjs)
        o_rAnchoredObjs.push_back(&rpDrawVirtObj->AnchoredObj());
}

// AW: own sdr::contact::ViewContact (VC) sdr::contact::ViewObjectContact (VOC) needed
// since offset is defined different from SdrVirtObj's sdr::contact::ViewContactOfVirtObj.
// For paint, that offset is used by setting at the OutputDevice; for primitives this is
// not possible since we have no OutputDevice, but define the geometry itself.

namespace sdr::contact
{
        namespace {

        class VOCOfDrawVirtObj : public ViewObjectContactOfSdrObj
        {
        protected:
            /**
             * This method is responsible for creating the graphical visualisation data which is
             * stored/cached in the local primitive. Default gets view-independent Primitive from
             * the ViewContact using ViewContact::getViewIndependentPrimitive2DContainer(), takes
             * care of visibility, handles glue and ghosted.
             *
             * This method will not handle included hierarchies and not check geometric visibility.
             */
            virtual void createPrimitive2DSequence(const DisplayInfo& rDisplayInfo, drawinglayer::primitive2d::Primitive2DDecompositionVisitor& rVisitor) const override;

        public:
            VOCOfDrawVirtObj(ObjectContact& rObjectContact, ViewContact& rViewContact)
            :   ViewObjectContactOfSdrObj(rObjectContact, rViewContact)
            {
            }
        };

        class VCOfDrawVirtObj : public ViewContactOfVirtObj
        {
        protected:
            /** Create an Object-Specific ViewObjectContact, set ViewContact and ObjectContact.
             *
             * Always needs to return something. Default is to create a standard ViewObjectContact
             * containing the given ObjectContact and *this.
             */
            virtual ViewObjectContact& CreateObjectSpecificViewObjectContact(ObjectContact&&nbsp;rObjectContact) override;

        public:
            /// basic constructor, used from SdrObject.
            explicit VCOfDrawVirtObj(SwDrawVirtObj& rObj)
            :   ViewContactOfVirtObj(rObj)
            {
            }

            /// access to SwDrawVirtObj
            SwDrawVirtObj& GetSwDrawVirtObj() const
            {
                return static_cast<SwDrawVirtObj&>(mrObject);
            }
        };

        }
} // end of namespace sdr::contact

namespace sdr::contact
{
        /// recursively collect primitive data from given VOC with given offset
        static void impAddPrimitivesFromGroup(const ViewObjectContact& rVOC, const basegfx::B2DHomMatrix& rOffsetMatrix, const DisplayInfo& rDisplayInfo, drawinglayer::primitive2d::Primitive2DContainer& rxTarget)
        {
            const sal_uInt32 nSubHierarchyCount(rVOC.GetViewContact().GetObjectCount());

            for(sal_uInt32 a(0); a < nSubHierarchyCount; a++)
            {
                const ViewObjectContact& rCandidate(rVOC.GetViewContact().GetViewContact(a).GetViewObjectContact(rVOC.GetObjectContact()));

                if(rCandidate.GetViewContact().GetObjectCount())
                {
                    // is a group object itself, call recursively
                    impAddPrimitivesFromGroup(rCandidate, rOffsetMatrix, rDisplayInfo, rxTarget);
                }
                else
                {
                    // single object, add primitives; check model-view visibility
                    if(rCandidate.isPrimitiveVisible(rDisplayInfo))
                    {
                        drawinglayer::primitive2d::Primitive2DContainer aNewSequence(rCandidate.getPrimitive2DSequence(rDisplayInfo));

                        if(!aNewSequence.empty())
                        {
                            // get ranges
                            const drawinglayer::geometry::ViewInformation2D& rViewInformation2D(rCandidate.GetObjectContact().getViewInformation2D());
                            const basegfx::B2DRange& aViewRange(rViewInformation2D.getViewport());
                            basegfx::B2DRange aObjectRange(rCandidate.getObjectRange());

                            // correct with virtual object's offset
                            aObjectRange.transform(rOffsetMatrix);

                            // check geometrical visibility (with offset)
                            if(!aViewRange.overlaps(aObjectRange))
                            {
                                // not visible, release
                                aNewSequence.clear();
                            }
                        }

                        if(!aNewSequence.empty())
                        {
                            rxTarget.append(std::move(aNewSequence));
                        }
                    }
                }
            }
        }

        void VOCOfDrawVirtObj::createPrimitive2DSequence(const DisplayInfo& rDisplayInfo, drawinglayer::primitive2d::Primitive2DDecompositionVisitor& rVisitor) const
        {
            // this may be called for painting where it's a precondition that
            // isPrimitiveVisible() is true, or for e.g. getObjectRange() (even
            // during layout) where there are no preconditions...
            // nasty corner case: override to clear page frame to disable the
            // sub-objects' anchor check, because their anchor is always on
            // the first page that the page style is applied to
            DisplayInfo aDisplayInfo(rDisplayInfo);
            aDisplayInfo.SetWriterPageFrame(basegfx::B2IRectangle());
            const VCOfDrawVirtObj& rVC = static_cast< const VCOfDrawVirtObj& >(GetViewContact());
            const SdrObject& rReferencedObject = rVC.GetSwDrawVirtObj().GetReferencedObj();
            drawinglayer::primitive2d::Primitive2DContainer xRetval;

            // create offset transformation
            basegfx::B2DHomMatrix aOffsetMatrix;
            const Point aLocalOffset(rVC.GetSwDrawVirtObj().GetOffset());

            if(aLocalOffset.X() || aLocalOffset.Y())
            {
                aOffsetMatrix.set(0, 2, aLocalOffset.X());
                aOffsetMatrix.set(1, 2, aLocalOffset.Y());
            }

            if(dynamic_cast<const SdrObjGroup*>( &rReferencedObject) !=  nullptr)
            {
                // group object. Since the VOC/OC/VC hierarchy does not represent the
                // hierarchy virtual objects when they have group objects
                // (ViewContactOfVirtObj::GetObjectCount() returns null for that purpose)
                // to avoid multiple usages of VOCs (which would not work), the primitives
                // for the sub-hierarchy need to be collected here

                // Get the VOC of the referenced object (the Group) and fetch primitives from it
                const ViewObjectContact& rVOCOfRefObj = rReferencedObject.GetViewContact().GetViewObjectContact(GetObjectContact());
                impAddPrimitivesFromGroup(rVOCOfRefObj, aOffsetMatrix, aDisplayInfo, xRetval);
            }
            else
            {
                // single object, use method from referenced object to get the Primitive2DSequence
                rReferencedObject.GetViewContact().getViewIndependentPrimitive2DContainer(xRetval);
            }

            if(!xRetval.empty())
            {
                // create transform primitive
                xRetval = drawinglayer::primitive2d::Primitive2DContainer {
                    new drawinglayer::primitive2d::TransformPrimitive2D(aOffsetMatrix, std::move(xRetval))
                };
            }

            rVisitor.visit(xRetval);
        }

        ViewObjectContact& VCOfDrawVirtObj::CreateObjectSpecificViewObjectContact(ObjectContact& rObjectContact)
        {
            return *(new VOCOfDrawVirtObj(rObjectContact, *this));
        }

} // end of namespace sdr::contact

/// implementation of class <SwDrawVirtObj>
std::unique_ptr<sdr::contact::ViewContact> SwDrawVirtObj::CreateObjectSpecificViewContact()
{
    return std::make_unique<sdr::contact::VCOfDrawVirtObj>(*this);
}

SwDrawVirtObj::SwDrawVirtObj(
    SdrModel& rSdrModel,
    SdrObject& _rNewObj,
    SwDrawContact& _rDrawContact)
:   SdrVirtObj(rSdrModel, _rNewObj ),
    mrDrawContact(_rDrawContact)
{
    // #i26791#
    maAnchoredDrawObj.SetDrawObj( *this );

    // #i35635# - set initial position out of sight
    NbcMove( Size( -16000, -16000 ) );
}

SwDrawVirtObj::SwDrawVirtObj(
    SdrModel& rSdrModel,
    SwDrawVirtObj const & rSource)
:   SdrVirtObj(rSdrModel, rSource),
    mrDrawContact(rSource.mrDrawContact)
{
    // #i26791#
    maAnchoredDrawObj.SetDrawObj( *this );

    // #i35635# - set initial position out of sight
    NbcMove( Size( -16000, -16000 ) );

    // Note: Members <maAnchoredDrawObj> and <mrDrawContact>
    //       haven't to be considered.
}

SwDrawVirtObj::~SwDrawVirtObj()
{
}

rtl::Reference<SdrObject> SwDrawVirtObj::CloneSdrObject(SdrModel& rTargetModel) const
{
    return new SwDrawVirtObj(rTargetModel, *this);
}

const SwFrame* SwDrawVirtObj::GetAnchorFrame() const
{
    // #i26791# - use new member <maAnchoredDrawObj>
    return maAnchoredDrawObj.GetAnchorFrame();
}

SwFrame* SwDrawVirtObj::AnchorFrame()
{
    // #i26791# - use new member <maAnchoredDrawObj>
    return maAnchoredDrawObj.AnchorFrame();
}

void SwDrawVirtObj::RemoveFromWriterLayout()
{
    // remove contact object from frame for 'virtual' drawing object
    // #i26791# - use new member <maAnchoredDrawObj>
    if ( maAnchoredDrawObj.GetAnchorFrame() )
    {
        maAnchoredDrawObj.AnchorFrame()->RemoveDrawObj( maAnchoredDrawObj );
    }
}

void SwDrawVirtObj::AddToDrawingPage(SwFrame const& rAnchorFrame)
{
    // determine 'master'
    SdrObject* pOrgMasterSdrObj = mrDrawContact.GetMaster();

    // insert 'virtual' drawing object into page, set layer and user call.
    SdrPage* pDrawPg = pOrgMasterSdrObj->getSdrPageFromSdrObject();
    // default: insert before master object
    auto nOrdNum(GetReferencedObj().GetOrdNum());

    // maintain invariant that a shape's textbox immediately follows the shape
    // also for the multiple SdrDrawVirtObj created for shapes in header/footer
    if (SwFrameFormat const*const pFlyFormat =
            SwTextBoxHelper::getOtherTextBoxFormat(mrDrawContact.GetFormat(), RES_DRAWFRMFMT))
    {
        // this is for the case when the flyframe SdrVirtObj is created before the draw one
        if (SwSortedObjs const*const pObjs = rAnchorFrame.GetDrawObjs())
        {
            for (SwAnchoredObject const*const pAnchoredObj : *pObjs)
            {
                if (pAnchoredObj->GetFrameFormat() == pFlyFormat)
                {
                    assert(dynamic_cast<SwFlyFrame const*>(pAnchoredObj));

                    if (pAnchoredObj->GetDrawObj()->GetOrdNum() >= GetReferencedObj().GetOrdNum())
                    {
                        // This virtual draw object has an associated fly one, but the fly's index
                        // is not below the masters, fix it up.
                        if (pDrawPg)
                        {
                            pDrawPg->SetObjectOrdNum(pAnchoredObj->GetDrawObj()->GetOrdNumDirect(), GetReferencedObj().GetOrdNum());
                        }
                    }

                    nOrdNum = pAnchoredObj->GetDrawObj()->GetOrdNum();
                    // the master SdrObj should have the highest index
                    assert(nOrdNum < GetReferencedObj().GetOrdNum());
                    break;
                }
            }
        }
        // this happens on initial insertion, the draw object is created first
        SAL_INFO_IF(GetReferencedObj().GetOrdNum() == nOrdNum, "sw", "AddToDrawingPage: cannot find SdrObject for text box's shape");
    }

    // #i27030# - apply order number of referenced object
    if ( nullptr != pDrawPg )
    {
        // #i27030# - apply order number of referenced object
        pDrawPg->InsertObject(this, nOrdNum);
    }
    else
    {
        pDrawPg = getSdrPageFromSdrObject();
        if ( pDrawPg )
        {
            pDrawPg->SetObjectOrdNum(GetOrdNumDirect(), nOrdNum);
        }
        else
        {
            SetOrdNum(nOrdNum);
        }
    }
    SetUserCall( &mrDrawContact );
}

void SwDrawVirtObj::RemoveFromDrawingPage()
{
    SetUserCall( nullptr );
    if ( getSdrPageFromSdrObject() )
    {
        getSdrPageFromSdrObject()->RemoveObject( GetOrdNum() );
    }
}

/// Is 'virtual' drawing object connected to writer layout and to drawing layer?
bool SwDrawVirtObj::IsConnected() const
{
    bool bRetVal = GetAnchorFrame() &&
                   ( getSdrPageFromSdrObject() && GetUserCall() );

    return bRetVal;
}

void SwDrawVirtObj::NbcSetAnchorPos(const Point& rPnt)
{
    SdrObject::NbcSetAnchorPos( rPnt );
}

// #i97197#
// the methods relevant for positioning

const tools::Rectangle& SwDrawVirtObj::GetCurrentBoundRect() const
{
    if (getOutRectangle().IsEmpty())
    {
        const_cast<SwDrawVirtObj*>(this)->RecalcBoundRect();
    }

    return getOutRectangle();
}

const tools::Rectangle& SwDrawVirtObj::GetLastBoundRect() const
{
    return getOutRectangle();
}

Point SwDrawVirtObj::GetOffset() const
{
    // do NOT use IsEmpty() here, there is already a useful offset
    // in the position
    if (getOutRectangle() == tools::Rectangle())
    {
        return Point();
    }
    else
    {
        return getOutRectangle().TopLeft() - GetReferencedObj().GetCurrentBoundRect().TopLeft();
    }
}

void SwDrawVirtObj::SetBoundRectDirty()
{
    // do nothing to not lose model information in aOutRect
}

void SwDrawVirtObj::RecalcBoundRect()
{
    // #i26791# - switch order of calling <GetOffset()> and
    // <ReferencedObj().GetCurrentBoundRect()>, because <GetOffset()> calculates
    // its value by the 'BoundRect' of the referenced object.

    const Point aOffset(GetOffset());
    setOutRectangle(ReferencedObj().GetCurrentBoundRect() + aOffset);
}

basegfx::B2DPolyPolygon SwDrawVirtObj::TakeXorPoly() const
{
    basegfx::B2DPolyPolygon aRetval(mxRefObj->TakeXorPoly());
    aRetval.translate(GetOffset().X(), GetOffset().Y());

    return aRetval;
}

basegfx::B2DPolyPolygon SwDrawVirtObj::TakeContour() const
{
    basegfx::B2DPolyPolygon aRetval(mxRefObj->TakeContour());
    aRetval.translate(GetOffset().X(), GetOffset().Y());

    return aRetval;
}

void SwDrawVirtObj::AddToHdlList(SdrHdlList& rHdlList) const
{
    SdrHdlList tmpList(nullptr);
    mxRefObj->AddToHdlList(tmpList);

    size_t cnt = tmpList.GetHdlCount();
    for(size_t i=0; i < cnt; ++i)
    {
        SdrHdl* pHdl = tmpList.GetHdl(i);
        Point aP(pHdl->GetPos() + GetOffset());
        pHdl->SetPos(aP);
    }
    tmpList.MoveTo(rHdlList);
}

void SwDrawVirtObj::NbcMove(const Size& rSiz)
{
    SdrObject::NbcMove( rSiz );
}

void SwDrawVirtObj::NbcResize(const Point& rRef, const Fraction& xFact, const Fraction& yFact)
{
    mxRefObj->NbcResize(rRef - GetOffset(), xFact, yFact);
    SetBoundAndSnapRectsDirty();
}

void SwDrawVirtObj::NbcRotate(const Point& rRef, Degree100 nAngle, double sn, double cs)
{
    mxRefObj->NbcRotate(rRef - GetOffset(), nAngle, sn, cs);
    SetBoundAndSnapRectsDirty();
}

void SwDrawVirtObj::NbcMirror(const Point& rRef1, const Point& rRef2)
{
    mxRefObj->NbcMirror(rRef1 - GetOffset(), rRef2 - GetOffset());
    SetBoundAndSnapRectsDirty();
}

void SwDrawVirtObj::NbcShear(const Point& rRef, Degree100 nAngle, double tn, bool bVShear)
{
    mxRefObj->NbcShear(rRef - GetOffset(), nAngle, tn, bVShear);
    SetBoundAndSnapRectsDirty();
}

void SwDrawVirtObj::Move(const Size& rSiz)
{
    SdrObject::Move( rSiz );
}

void SwDrawVirtObj::Resize(const Point& rRef, const Fraction& xFact, const Fraction& yFact, bool bUnsetRelative)
{
    if(xFact.GetNumerator() != xFact.GetDenominator() || yFact.GetNumerator() != yFact.GetDenominator())
    {
        tools::Rectangle aBoundRect0; if(m_pUserCall) aBoundRect0 = GetLastBoundRect();
        mxRefObj->Resize(rRef - GetOffset(), xFact, yFact, bUnsetRelative);
        SetBoundAndSnapRectsDirty();
        SendUserCall(SdrUserCallType::Resize, aBoundRect0);
    }
}

void SwDrawVirtObj::Rotate(const Point& rRef, Degree100 nAngle, double sn, double cs)
{
    if(nAngle)
    {
        tools::Rectangle aBoundRect0; if(m_pUserCall) aBoundRect0 = GetLastBoundRect();
        mxRefObj->Rotate(rRef - GetOffset(), nAngle, sn, cs);
        SetBoundAndSnapRectsDirty();
        SendUserCall(SdrUserCallType::Resize, aBoundRect0);
    }
}

void SwDrawVirtObj::Mirror(const Point& rRef1, const Point& rRef2)
{
    tools::Rectangle aBoundRect0; if(m_pUserCall) aBoundRect0 = GetLastBoundRect();
    mxRefObj->Mirror(rRef1 - GetOffset(), rRef2 - GetOffset());
    SetBoundAndSnapRectsDirty();
    SendUserCall(SdrUserCallType::Resize, aBoundRect0);
}

void SwDrawVirtObj::Shear(const Point& rRef, Degree100 nAngle, double tn, bool bVShear)
{
    if(nAngle)
    {
        tools::Rectangle aBoundRect0; if(m_pUserCall) aBoundRect0 = GetLastBoundRect();
        mxRefObj->Shear(rRef - GetOffset(), nAngle, tn, bVShear);
        SetBoundAndSnapRectsDirty();
        SendUserCall(SdrUserCallType::Resize, aBoundRect0);
    }
}

void SwDrawVirtObj::RecalcSnapRect()
{
    maSnapRect = mxRefObj->GetSnapRect();
    maSnapRect += GetOffset();
}

const tools::Rectangle& SwDrawVirtObj::GetSnapRect() const
{
    const_cast<SwDrawVirtObj*>(this)->maSnapRect = mxRefObj->GetSnapRect();
    const_cast<SwDrawVirtObj*>(this)->maSnapRect += GetOffset();

    return maSnapRect;
}

void SwDrawVirtObj::SetSnapRect(const tools::Rectangle& rRect)
{
    tools::Rectangle aBoundRect0; if(m_pUserCall) aBoundRect0 = GetLastBoundRect();
    tools::Rectangle aR(rRect);
    aR -= GetOffset();
    mxRefObj->SetSnapRect(aR);
    SetBoundAndSnapRectsDirty();
    SendUserCall(SdrUserCallType::Resize, aBoundRect0);
}

void SwDrawVirtObj::NbcSetSnapRect(const tools::Rectangle& rRect)
{
    tools::Rectangle aR(rRect);
    aR -= GetOffset();
    SetBoundAndSnapRectsDirty();
    mxRefObj->NbcSetSnapRect(aR);
}

const tools::Rectangle& SwDrawVirtObj::GetLogicRect() const
{
    const_cast<SwDrawVirtObj*>(this)->maSnapRect = mxRefObj->GetLogicRect();
    const_cast<SwDrawVirtObj*>(this)->maSnapRect += GetOffset();

    return maSnapRect;
}

void SwDrawVirtObj::SetLogicRect(const tools::Rectangle& rRect)
{
    tools::Rectangle aBoundRect0; if(m_pUserCall) aBoundRect0 = GetLastBoundRect();
    tools::Rectangle aR(rRect);
    aR -= GetOffset();
    mxRefObj->SetLogicRect(aR);
    SetBoundAndSnapRectsDirty();
    SendUserCall(SdrUserCallType::Resize, aBoundRect0);
}

void SwDrawVirtObj::NbcSetLogicRect(const tools::Rectangle& rRect, bool bAdaptTextMinSize)
{
    tools::Rectangle aR(rRect);
    aR -= GetOffset();
    mxRefObj->NbcSetLogicRect(aR, bAdaptTextMinSize);
    SetBoundAndSnapRectsDirty();
}

Point SwDrawVirtObj::GetSnapPoint(sal_uInt32 i) const
{
    Point aP(mxRefObj->GetSnapPoint(i));
    aP += GetOffset();

    return aP;
}

Point SwDrawVirtObj::GetPoint(sal_uInt32 i) const
{
    return mxRefObj->GetPoint(i) + GetOffset();
}

void SwDrawVirtObj::NbcSetPoint(const Point& rPnt, sal_uInt32 i)
{
    Point aP(rPnt);
    aP -= GetOffset();
    mxRefObj->SetPoint(aP, i);
    SetBoundAndSnapRectsDirty();
}

bool SwDrawVirtObj::HasTextEdit() const
{
    return mxRefObj->HasTextEdit();
}

// override 'layer' methods for 'virtual' drawing object to assure
// that layer of 'virtual' object is the layer of the referenced object.
SdrLayerID SwDrawVirtObj::GetLayer() const
{
    return GetReferencedObj().GetLayer();
}

void SwDrawVirtObj::NbcSetLayer(SdrLayerID nLayer)
{
    ReferencedObj().NbcSetLayer( nLayer );
    SdrVirtObj::NbcSetLayer( ReferencedObj().GetLayer() );
}

void SwDrawVirtObj::SetLayer(SdrLayerID nLayer)
{
    ReferencedObj().SetLayer( nLayer );
    SdrVirtObj::NbcSetLayer( ReferencedObj().GetLayer() );
}

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