format.cxx

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

#include <DocumentSettingManager.hxx> //For SwFmt::getIDocumentSettingAccess()
#include <IDocumentTimerAccess.hxx>
#include <doc.hxx>
#include <fmtcolfunc.hxx>
#include <format.hxx>
#include <frame.hxx>
#include <frmatr.hxx>
#include <hintids.hxx>
#include <hints.hxx>
#include <o3tl/unit_conversion.hxx>
#include <osl/diagnose.h>
#include <sal/log.hxx>
#include <svl/grabbagitem.hxx>
#include <svx/sdr/attribute/sdrallfillattributeshelper.hxx>
#include <svx/unobrushitemhelper.hxx>
#include <svx/xdef.hxx>
#include <swcache.hxx>

using namespace com::sun::star;

SwFormat::SwFormat( SwAttrPool& rPool, const char* pFormatNm,
              const sal_uInt16* pWhichRanges, SwFormat *pDrvdFrame,
              sal_uInt16 nFormatWhich ) :
    m_aFormatName( OUString::createFromAscii(pFormatNm) ),
    m_aSet( rPool, pWhichRanges ),
    m_nWhichId( nFormatWhich ),
    m_nPoolFormatId( USHRT_MAX ),
    m_nPoolHelpId( USHRT_MAX ),
    m_nPoolHlpFileId( UCHAR_MAX )
{
    m_bAutoUpdateFormat = false; // LAYER_IMPL
    m_bAutoFormat = true;
    m_bFormatInDTOR = m_bHidden = false;

    if( pDrvdFrame )
    {
        pDrvdFrame->Add(this);
        m_aSet.SetParent( &pDrvdFrame->m_aSet );
    }
}

SwFormat::SwFormat( SwAttrPool& rPool, const OUString& rFormatNm,
              const sal_uInt16* pWhichRanges, SwFormat* pDrvdFrame,
              sal_uInt16 nFormatWhich ) :
    m_aFormatName( rFormatNm ),
    m_aSet( rPool, pWhichRanges ),
    m_nWhichId( nFormatWhich ),
    m_nPoolFormatId( USHRT_MAX ),
    m_nPoolHelpId( USHRT_MAX ),
    m_nPoolHlpFileId( UCHAR_MAX )
{
    m_bAutoUpdateFormat = false; // LAYER_IMPL
    m_bAutoFormat = true;
    m_bFormatInDTOR = m_bHidden = false;

    if( pDrvdFrame )
    {
        pDrvdFrame->Add(this);
        m_aSet.SetParent( &pDrvdFrame->m_aSet );
    }
}

SwFormat::SwFormat( const SwFormat& rFormat ) :
    sw::BorderCacheOwner(),
    m_aFormatName( rFormat.m_aFormatName ),
    m_aSet( rFormat.m_aSet ),
    m_nWhichId( rFormat.m_nWhichId ),
    m_nPoolFormatId( rFormat.GetPoolFormatId() ),
    m_nPoolHelpId( rFormat.GetPoolHelpId() ),
    m_nPoolHlpFileId( rFormat.GetPoolHlpFileId() )
{
    m_bFormatInDTOR = false; // LAYER_IMPL
    m_bAutoFormat = rFormat.m_bAutoFormat;
    m_bHidden = rFormat.m_bHidden;
    m_bAutoUpdateFormat = rFormat.m_bAutoUpdateFormat;

    if( auto pDerived = rFormat.DerivedFrom() )
    {
        pDerived->Add(this);
        m_aSet.SetParent( &pDerived->m_aSet );
    }
    // a few special treatments for attributes
    m_aSet.SetModifyAtAttr( this );
}

SwFormat &SwFormat::operator=(const SwFormat& rFormat)
{
    if(this == &rFormat)
        return *this;

    m_nWhichId = rFormat.m_nWhichId;
    m_nPoolFormatId = rFormat.GetPoolFormatId();
    m_nPoolHelpId = rFormat.GetPoolHelpId();
    m_nPoolHlpFileId = rFormat.GetPoolHlpFileId();

    InvalidateInSwCache(RES_OBJECTDYING);

    // copy only array with attributes delta
    SwAttrSet aOld( *m_aSet.GetPool(), m_aSet.GetRanges() ),
              aNew( *m_aSet.GetPool(), m_aSet.GetRanges() );
    m_aSet.Intersect_BC( rFormat.m_aSet, &aOld, &aNew );
    (void)m_aSet.Put_BC( rFormat.m_aSet, &aOld, &aNew );

    // a few special treatments for attributes
    m_aSet.SetModifyAtAttr( this );

    // create PoolItem attribute for Modify
    if( aOld.Count() )
    {
        sw::ClientNotifyAttrChg(*this, m_aSet, aOld, aNew);
    }

    if(GetRegisteredIn() != rFormat.GetRegisteredIn())
    {
        StartListeningToSameModifyAs(rFormat);
        m_aSet.SetParent( GetRegisteredIn()
            ? &rFormat.m_aSet
            : nullptr);
    }

    m_bAutoFormat = rFormat.m_bAutoFormat;
    m_bHidden = rFormat.m_bHidden;
    m_bAutoUpdateFormat = rFormat.m_bAutoUpdateFormat;
    return *this;
}

void SwFormat::SetName( const OUString& rNewName, bool bBroadcast )
{
    OSL_ENSURE( !IsDefault(), "SetName: Defaultformat" );
    if( bBroadcast )
    {
        SwStringMsgPoolItem aOld( RES_NAME_CHANGED, m_aFormatName );
        SwStringMsgPoolItem aNew( RES_NAME_CHANGED, rNewName );
        m_aFormatName = rNewName;
        const sw::LegacyModifyHint aHint(&aOld, &aNew);
        SwClientNotify(*this, aHint);
    }
    else
    {
        m_aFormatName = rNewName;
    }
}

void SwFormat::CopyAttrs( const SwFormat& rFormat )
{
    // copy only array with attributes delta
    InvalidateInSwCache(RES_ATTRSET_CHG);
    InvalidateInSwFntCache(RES_ATTRSET_CHG);

    // special treatments for some attributes
    SwAttrSet* pChgSet = const_cast<SwAttrSet*>(&rFormat.m_aSet);

    // copy only array with attributes delta
    if( pChgSet->GetPool() != m_aSet.GetPool() )
        pChgSet->CopyToModify( *this );
    else
    {
        SwAttrSet aOld( *m_aSet.GetPool(), m_aSet.GetRanges() ),
                  aNew( *m_aSet.GetPool(), m_aSet.GetRanges() );

        if ( m_aSet.Put_BC( *pChgSet, &aOld, &aNew ) )
        {
            // a few special treatments for attributes
            m_aSet.SetModifyAtAttr( this );

            SwAttrSetChg aChgOld( m_aSet, aOld );
            SwAttrSetChg aChgNew( m_aSet, aNew );
            SwClientNotify(*this, sw::LegacyModifyHint(&aChgOld, &aChgNew)); // send all modified ones
        }
    }

    if( pChgSet != &rFormat.m_aSet ) // was a Set created?
        delete pChgSet;
}

SwFormat::~SwFormat()
{
    // This happens at an ObjectDying message. Thus put all dependent
    // ones on DerivedFrom.
    if(!HasWriterListeners())
        return;

    m_bFormatInDTOR = true;
    
    if(!DerivedFrom())
    {
        SwFormat::ResetFormatAttr(RES_PAGEDESC);
        SAL_WARN("sw.core", "~SwFormat: format still has clients on death, but parent format is missing: " << GetName());
        return;
    }
    SwIterator<SwClient,SwFormat> aIter(*this);
    for(SwClient* pClient = aIter.First(); pClient; pClient = aIter.Next())
        pClient->CheckRegistrationFormat(*this);
    assert(!HasWriterListeners());
}

void SwFormat::SwClientNotify(const SwModify&, const SfxHint& rHint)
{
    auto pLegacy = dynamic_cast<const sw::LegacyModifyHint*>(&rHint);
    if(!pLegacy)
        return;

    std::unique_ptr<SwAttrSetChg> pOldClientChg, pNewClientChg;
    auto pDependsHint = std::make_unique<sw::LegacyModifyHint>(pLegacy->m_pOld, pLegacy->m_pNew);
    const sal_uInt16 nWhich = pLegacy->GetWhich();
    InvalidateInSwCache(nWhich);
    switch(nWhich)
    {
        case 0:
            break;
        case RES_OBJECTDYING:
        {
            // NB: this still notifies depends even if pLegacy->m_pNew is nullptr, which seems non-obvious
            if(!pLegacy->m_pNew)
                break;
            // If the dying object is the parent format of this format so
            // attach this to the parent of the parent
            SwFormat* pFormat = static_cast<SwFormat*>(pLegacy->m_pNew->StaticWhichCast(RES_OBJECTDYING).pObject);

            // do not move if this is the topmost format
            if(GetRegisteredIn() && GetRegisteredIn() == pFormat)
            {
                if(pFormat->GetRegisteredIn())
                {
                    // if parent so register in new parent
                    pFormat->DerivedFrom()->Add(this);
                    m_aSet.SetParent(&DerivedFrom()->m_aSet);
                }
                else
                {
                    // otherwise de-register at least from dying one
                    EndListeningAll();
                    m_aSet.SetParent(nullptr);
                }
            }
            break;
        }
        case RES_ATTRSET_CHG:
        {
            // NB: this still notifies depends even if this condition is not met, which seems non-obvious
            auto pOldAttrSetChg = static_cast<const SwAttrSetChg*>(pLegacy->m_pOld);
            auto pNewAttrSetChg = static_cast<const SwAttrSetChg*>(pLegacy->m_pNew);
            if (pOldAttrSetChg && pNewAttrSetChg && pOldAttrSetChg->GetTheChgdSet() != &m_aSet)
            {
                // pass only those that are not set...
                pNewClientChg.reset(new SwAttrSetChg(*pNewAttrSetChg));
                pNewClientChg->GetChgSet()->Differentiate(m_aSet);
                if(pNewClientChg->Count()) // ... if any
                {
                    pOldClientChg.reset(new SwAttrSetChg(*pOldAttrSetChg));
                    pOldClientChg->GetChgSet()->Differentiate(m_aSet);
                    pDependsHint.reset(new sw::LegacyModifyHint(pOldClientChg.get(), pNewClientChg.get()));
                }
                else
                    pDependsHint.reset(nullptr);
            }
            break;
        }
        case RES_FMT_CHG:
        {
            // if the format parent will be moved so register my attribute set at
            // the new one

            // skip my own Modify
            // NB: this still notifies depends even if this condition is not met, which seems non-obvious
            auto pOldFormatChg = static_cast<const SwFormatChg*>(pLegacy->m_pOld);
            auto pNewFormatChg = static_cast<const SwFormatChg*>(pLegacy->m_pNew);
            if(pOldFormatChg && pNewFormatChg && pOldFormatChg->pChangedFormat != this && pNewFormatChg->pChangedFormat == GetRegisteredIn())
            {
                // attach Set to new parent
                m_aSet.SetParent(DerivedFrom() ? &DerivedFrom()->m_aSet : nullptr);
            }
            break;
        }
        default:
            // attribute is defined in this format
            if(SfxItemState::SET == m_aSet.GetItemState(nWhich, false))
            {
                // DropCaps might come into this block
                SAL_WARN_IF(RES_PARATR_DROP != nWhich, "sw.core", "Hint was sent without sender");
                pDependsHint.reset(nullptr);
            }
    }
    if(pDependsHint)
    {
        InvalidateInSwFntCache(pDependsHint->GetWhich());
        SwModify::SwClientNotify(*this, *pDependsHint);
    }
}

bool SwFormat::SetDerivedFrom(SwFormat *pDerFrom)
{
    if ( pDerFrom )
    {
        const SwFormat* pFormat = pDerFrom;
        while ( pFormat != nullptr )
        {
            if ( pFormat == this )
                return false;

            pFormat=pFormat->DerivedFrom();
        }
    }
    else
    {
        // nothing provided, search for Dflt format
        pDerFrom = this;
        while ( pDerFrom->DerivedFrom() )
            pDerFrom = pDerFrom->DerivedFrom();
    }
    if ( (pDerFrom == DerivedFrom()) || (pDerFrom == this) )
        return false;

    assert(    Which()==pDerFrom->Which()
            || (Which()==RES_CONDTXTFMTCOLL && pDerFrom->Which()==RES_TXTFMTCOLL)
            || (Which()==RES_TXTFMTCOLL && pDerFrom->Which()==RES_CONDTXTFMTCOLL)
            || (Which()==RES_FLYFRMFMT && pDerFrom->Which()==RES_FRMFMT)
            );

    InvalidateInSwCache(RES_ATTRSET_CHG);
    InvalidateInSwFntCache(RES_ATTRSET_CHG);

    pDerFrom->Add( this );
    m_aSet.SetParent( &pDerFrom->m_aSet );

    SwFormatChg aOldFormat( this );
    SwFormatChg aNewFormat( this );
    const sw::LegacyModifyHint aHint(&aOldFormat, &aNewFormat);
    SwClientNotify(*this, aHint);

    return true;
}

bool SwFormat::supportsFullDrawingLayerFillAttributeSet() const
{
    return false;
}

const SfxPoolItem& SwFormat::GetFormatAttr( sal_uInt16 nWhich, bool bInParents ) const
{
    if (RES_BACKGROUND == nWhich && supportsFullDrawingLayerFillAttributeSet())
    {
        // FALLBACKBREAKHERE should not be used; instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST]
        SAL_INFO("sw.core", "Do no longer use SvxBrushItem, instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST] FillAttributes or makeBackgroundBrushItem (simple fallback is in place and used)");
        static std::unique_ptr<SvxBrushItem> aSvxBrushItem; //(std::make_shared<SvxBrushItem>(RES_BACKGROUND));

        // fill the local static SvxBrushItem from the current ItemSet so that
        // the fill attributes [XATTR_FILL_FIRST .. XATTR_FILL_LAST] are used
        // as good as possible to create a fallback representation and return that
        aSvxBrushItem = getSvxBrushItemFromSourceSet(m_aSet, RES_BACKGROUND, bInParents);

        return *aSvxBrushItem;
    }

    return m_aSet.Get( nWhich, bInParents );
}

SfxItemState SwFormat::GetItemState( sal_uInt16 nWhich, bool bSrchInParent, const SfxPoolItem **ppItem ) const
{
    if (RES_BACKGROUND == nWhich && supportsFullDrawingLayerFillAttributeSet())
    {
        // FALLBACKBREAKHERE should not be used; instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST]
        SAL_INFO("sw.core", "Do no longer use SvxBrushItem, instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST] FillAttributes or SwFormat::GetBackgroundStat (simple fallback is in place and used)");
        const drawinglayer::attribute::SdrAllFillAttributesHelperPtr aFill = getSdrAllFillAttributesHelper();

        // check if the new fill attributes are used
        if(aFill && aFill->isUsed())
        {
            // if yes, fill the local SvxBrushItem using the new fill attributes
            // as good as possible to have an instance for the pointer to point
            // to and return as state that it is set
            static std::unique_ptr<SvxBrushItem> aSvxBrushItem; //(RES_BACKGROUND);

            aSvxBrushItem = getSvxBrushItemFromSourceSet(m_aSet, RES_BACKGROUND, bSrchInParent);
            if( ppItem )
                *ppItem = aSvxBrushItem.get();

            return SfxItemState::SET;
        }

        // if not, reset pointer and return SfxItemState::DEFAULT to signal that
        // the item is not set
        if( ppItem )
            *ppItem = nullptr;

        return SfxItemState::DEFAULT;
    }

    return m_aSet.GetItemState( nWhich, bSrchInParent, ppItem );
}

SfxItemState SwFormat::GetBackgroundState(std::unique_ptr<SvxBrushItem>& rItem) const
{
    if (supportsFullDrawingLayerFillAttributeSet())
    {
        // FALLBACKBREAKHERE should not be used; instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST]
        const drawinglayer::attribute::SdrAllFillAttributesHelperPtr aFill = getSdrAllFillAttributesHelper();

        // check if the new fill attributes are used
        if(aFill && aFill->isUsed())
        {
            // if yes, fill the local SvxBrushItem using the new fill attributes
            // as good as possible to have an instance for the pointer to point
            // to and return as state that it is set
            rItem = getSvxBrushItemFromSourceSet(m_aSet, RES_BACKGROUND);
            return SfxItemState::SET;
        }

        // if not return SfxItemState::DEFAULT to signal that the item is not set
        return SfxItemState::DEFAULT;
    }

    const SfxPoolItem* pItem = nullptr;
    SfxItemState eRet = m_aSet.GetItemState(RES_BACKGROUND, true, &pItem);
    if (pItem)
        rItem.reset(&pItem->Clone()->StaticWhichCast(RES_BACKGROUND));
    return eRet;
}

bool SwFormat::SetFormatAttr( const SfxPoolItem& rAttr )
{
    const sal_uInt16 nWhich = rAttr.Which();
    InvalidateInSwFntCache( nWhich );
    InvalidateInSwCache( nWhich );

    bool bRet = false;

    if (RES_BACKGROUND == rAttr.Which() && supportsFullDrawingLayerFillAttributeSet())
    {
        // FALLBACKBREAKHERE should not be used; instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST]
        SAL_INFO("sw.core", "Do no longer use SvxBrushItem, instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST] FillAttributes (simple fallback is in place and used)");
        SfxItemSet aTempSet(*m_aSet.GetPool(), svl::Items<XATTR_FILL_FIRST, XATTR_FILL_LAST>{});
        const SvxBrushItem& rSource = rAttr.StaticWhichCast(RES_BACKGROUND);

        // fill a local ItemSet with the attributes corresponding as good as possible
        // to the new fill properties [XATTR_FILL_FIRST .. XATTR_FILL_LAST] and set these
        // as ItemSet
        setSvxBrushItemAsFillAttributesToTargetSet(rSource, aTempSet);

        if(IsModifyLocked())
        {
            bRet = m_aSet.Put( aTempSet );
            if( bRet )
            {
                m_aSet.SetModifyAtAttr( this );
            }
        }
        else
        {
            SwAttrSet aOld(*m_aSet.GetPool(), m_aSet.GetRanges()), aNew(*m_aSet.GetPool(), m_aSet.GetRanges());

            bRet = m_aSet.Put_BC(aTempSet, &aOld, &aNew);

            if(bRet)
            {
                m_aSet.SetModifyAtAttr(this);
                sw::ClientNotifyAttrChg(*this, m_aSet, aOld, aNew);
            }
        }

        return bRet;
    }

    // if Modify is locked then no modifications will be sent;
    // but call Modify always for FrameFormats
    const sal_uInt16 nFormatWhich = Which();
    if( IsModifyLocked() ||
        ( !HasWriterListeners() &&
          (RES_GRFFMTCOLL == nFormatWhich  ||
           RES_TXTFMTCOLL == nFormatWhich ) ) )
    {
        bRet = nullptr != m_aSet.Put( rAttr );
        if( bRet )
            m_aSet.SetModifyAtAttr( this );
        // #i71574#
        if ( nFormatWhich == RES_TXTFMTCOLL && rAttr.Which() == RES_PARATR_NUMRULE )
        {
            TextFormatCollFunc::CheckTextFormatCollForDeletionOfAssignmentToOutlineStyle( this );
        }
    }
    else
    {
        // copy only array with attributes delta
        SwAttrSet aOld( *m_aSet.GetPool(), m_aSet.GetRanges() ),
                  aNew( *m_aSet.GetPool(), m_aSet.GetRanges() );

        bRet = m_aSet.Put_BC( rAttr, &aOld, &aNew );
        if( bRet )
        {
            // some special treatments for attributes
            m_aSet.SetModifyAtAttr( this );

            sw::ClientNotifyAttrChg(*this, m_aSet, aOld, aNew);
        }
    }
    return bRet;
}

bool SwFormat::SetFormatAttr( const SfxItemSet& rSet )
{
    if( !rSet.Count() )
        return false;

    InvalidateInSwCache(RES_ATTRSET_CHG);
    InvalidateInSwFntCache(RES_ATTRSET_CHG);

    bool bRet = false;

    // Use local copy to be able to apply needed changes, e.g. call
    // CheckForUniqueItemForLineFillNameOrIndex which is needed for NameOrIndex stuff
    SfxItemSet aTempSet(rSet);

    // Need to check for unique item for DrawingLayer items of type NameOrIndex
    // and evtl. correct that item to ensure unique names for that type. This call may
    // modify/correct entries inside of the given SfxItemSet
    if(GetDoc())
    {
        GetDoc()->CheckForUniqueItemForLineFillNameOrIndex(aTempSet);
    }

    if (supportsFullDrawingLayerFillAttributeSet())
    {
        const SfxPoolItem* pSource = nullptr;

        if(SfxItemState::SET == aTempSet.GetItemState(RES_BACKGROUND, false, &pSource))
        {
            // FALLBACKBREAKHERE should not be used; instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST]
            SAL_INFO("sw.core", "Do no longer use SvxBrushItem, instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST] FillAttributes (simple fallback is in place and used)");

            // copy all items to be set anyways to a local ItemSet with is also prepared for the new
            // fill attribute ranges [XATTR_FILL_FIRST .. XATTR_FILL_LAST]. Add the attributes
            // corresponding as good as possible to the new fill properties and set the whole ItemSet
            const SvxBrushItem& rSource(pSource->StaticWhichCast(RES_BACKGROUND));
            setSvxBrushItemAsFillAttributesToTargetSet(rSource, aTempSet);

            if(IsModifyLocked())
            {
                bRet = m_aSet.Put( aTempSet );
                if( bRet )
                {
                    m_aSet.SetModifyAtAttr( this );
                }
            }
            else
            {
                SwAttrSet aOld(*m_aSet.GetPool(), m_aSet.GetRanges()), aNew(*m_aSet.GetPool(), m_aSet.GetRanges());

                bRet = m_aSet.Put_BC(aTempSet, &aOld, &aNew);

                if(bRet)
                {
                    m_aSet.SetModifyAtAttr(this);
                    sw::ClientNotifyAttrChg(*this, m_aSet, aOld, aNew);
                }
            }

            return bRet;
        }
    }

    // if Modify is locked then no modifications will be sent;
    // but call Modify always for FrameFormats
    const sal_uInt16 nFormatWhich = Which();
    if ( IsModifyLocked() ||
         ( !HasWriterListeners() &&
           ( RES_GRFFMTCOLL == nFormatWhich ||
             RES_TXTFMTCOLL == nFormatWhich ) ) )
    {
        bRet = m_aSet.Put( aTempSet );
        if( bRet )
            m_aSet.SetModifyAtAttr( this );
        // #i71574#
        if ( nFormatWhich == RES_TXTFMTCOLL )
        {
            TextFormatCollFunc::CheckTextFormatCollForDeletionOfAssignmentToOutlineStyle( this );
        }
    }
    else
    {
        SwAttrSet aOld( *m_aSet.GetPool(), m_aSet.GetRanges() ),
                  aNew( *m_aSet.GetPool(), m_aSet.GetRanges() );
        bRet = m_aSet.Put_BC( aTempSet, &aOld, &aNew );
        if( bRet )
        {
            // some special treatments for attributes
            m_aSet.SetModifyAtAttr( this );
            sw::ClientNotifyAttrChg(*this, m_aSet, aOld, aNew);
        }
    }
    return bRet;
}

// remove Hint using nWhich from array with delta
bool SwFormat::ResetFormatAttr( sal_uInt16 nWhich1, sal_uInt16 nWhich2 )
{
    if( !m_aSet.Count() )
        return false;

    if( !nWhich2 || nWhich2 < nWhich1 )
        nWhich2 = nWhich1; // then set to 1st ID, only this item

    for( sal_uInt16 n = nWhich1; n < nWhich2; ++n )
        InvalidateInSwFntCache( n );
    for( sal_uInt16 n = nWhich1; n < nWhich2 && IsInCache(); ++n )
        InvalidateInSwCache( n );

    // if Modify is locked then no modifications will be sent
    if( IsModifyLocked() )
        return 0 != (( nWhich2 == nWhich1 )
                     ? m_aSet.ClearItem( nWhich1 )
                     : m_aSet.ClearItem_BC( nWhich1, nWhich2 ));

    SwAttrSet aOld( *m_aSet.GetPool(), m_aSet.GetRanges() ),
              aNew( *m_aSet.GetPool(), m_aSet.GetRanges() );
    bool bRet = 0 != m_aSet.ClearItem_BC( nWhich1, nWhich2, &aOld, &aNew );
    if( bRet )
        sw::ClientNotifyAttrChg(*this, m_aSet, aOld, aNew);
    return bRet;
}

// #i73790#
sal_uInt16 SwFormat::ResetAllFormatAttr()
{
    if( !m_aSet.Count() )
        return 0;

    InvalidateInSwCache(RES_ATTRSET_CHG);
    InvalidateInSwFntCache(RES_ATTRSET_CHG);

    // if Modify is locked then no modifications will be sent
    if( IsModifyLocked() )
        return m_aSet.ClearItem();

    SwAttrSet aOld( *m_aSet.GetPool(), m_aSet.GetRanges() ),
              aNew( *m_aSet.GetPool(), m_aSet.GetRanges() );
    bool bRet = 0 != m_aSet.ClearItem_BC( 0, &aOld, &aNew );
    if( bRet )
        sw::ClientNotifyAttrChg(*this, m_aSet, aOld, aNew);
    return aNew.Count();
}

void SwFormat::DelDiffs( const SfxItemSet& rSet )
{
    if( !m_aSet.Count() )
        return;

    InvalidateInSwCache(RES_ATTRSET_CHG);
    InvalidateInSwFntCache(RES_ATTRSET_CHG);

    // if Modify is locked then no modifications will be sent
    if( IsModifyLocked() )
    {
        m_aSet.Intersect( rSet );
        return;
    }

    SwAttrSet aOld( *m_aSet.GetPool(), m_aSet.GetRanges() ),
              aNew( *m_aSet.GetPool(), m_aSet.GetRanges() );
    bool bRet = 0 != m_aSet.Intersect_BC( rSet, &aOld, &aNew );
    if( bRet )
        sw::ClientNotifyAttrChg(*this, m_aSet, aOld, aNew);
}

void SwFormat::SetPageFormatToDefault()
{
    const sal_Int32 nSize = o3tl::convert(2, o3tl::Length::cm, o3tl::Length::twip);
    SetFormatAttr(SvxLRSpaceItem(nSize, nSize, nSize, 0, RES_LR_SPACE));
    SetFormatAttr(SvxULSpaceItem(nSize, nSize, RES_UL_SPACE));
}

bool SwFormat::IsBackgroundTransparent() const
{
    return false;
}

/*
 * Document Interface Access
 */
const IDocumentSettingAccess& SwFormat::getIDocumentSettingAccess() const { return GetDoc()->GetDocumentSettingManager(); }
const IDocumentDrawModelAccess& SwFormat::getIDocumentDrawModelAccess() const { return GetDoc()->getIDocumentDrawModelAccess(); }
IDocumentDrawModelAccess& SwFormat::getIDocumentDrawModelAccess() { return GetDoc()->getIDocumentDrawModelAccess(); }
const IDocumentLayoutAccess& SwFormat::getIDocumentLayoutAccess() const { return GetDoc()->getIDocumentLayoutAccess(); }
IDocumentLayoutAccess& SwFormat::getIDocumentLayoutAccess() { return GetDoc()->getIDocumentLayoutAccess(); }
IDocumentTimerAccess& SwFormat::getIDocumentTimerAccess() { return GetDoc()->getIDocumentTimerAccess(); }
IDocumentFieldsAccess& SwFormat::getIDocumentFieldsAccess() { return GetDoc()->getIDocumentFieldsAccess(); }
IDocumentChartDataProviderAccess& SwFormat::getIDocumentChartDataProviderAccess() { return GetDoc()->getIDocumentChartDataProviderAccess(); }

void SwFormat::GetGrabBagItem(uno::Any& rVal) const
{
    if (m_pGrabBagItem)
        m_pGrabBagItem->QueryValue(rVal);
    else
        rVal <<= uno::Sequence<beans::PropertyValue>();
}

void SwFormat::SetGrabBagItem(const uno::Any& rVal)
{
    if (!m_pGrabBagItem)
        m_pGrabBagItem = std::make_shared<SfxGrabBagItem>();

    m_pGrabBagItem->PutValue(rVal, 0);
}

std::unique_ptr<SvxBrushItem> SwFormat::makeBackgroundBrushItem(bool bInP) const
{
    if (supportsFullDrawingLayerFillAttributeSet())
    {
        // FALLBACKBREAKHERE should not be used; instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST]
        SAL_INFO("sw.core", "Do no longer use SvxBrushItem, instead use [XATTR_FILL_FIRST .. XATTR_FILL_LAST] FillAttributes (simple fallback is in place and used)");

        // fill the local static SvxBrushItem from the current ItemSet so that
        // the fill attributes [XATTR_FILL_FIRST .. XATTR_FILL_LAST] are used
        // as good as possible to create a fallback representation and return that
        return getSvxBrushItemFromSourceSet(m_aSet, RES_BACKGROUND, bInP);
    }

    return std::unique_ptr<SvxBrushItem>(m_aSet.GetBackground(bInP).Clone());
}

drawinglayer::attribute::SdrAllFillAttributesHelperPtr SwFormat::getSdrAllFillAttributesHelper() const
{
    return drawinglayer::attribute::SdrAllFillAttributesHelperPtr();
}

void SwFormat::RemoveAllUnos()
{
    SwPtrMsgPoolItem aMsgHint(RES_REMOVE_UNO_OBJECT, this);
    SwClientNotify(*this, sw::LegacyModifyHint(&aMsgHint, &aMsgHint));
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */