unoshtxt.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 <sal/config.h>
 
#include <memory>
 
#include <vcl/svapp.hxx>
 
#include <svx/unoshtxt.hxx>
#include <editeng/unoedhlp.hxx>
#include <svl/lstner.hxx>
#include <rtl/ref.hxx>
#include <tools/debug.hxx>
#include <svl/hint.hxx>
#include <svl/style.hxx>
#include <svx/svdmodel.hxx>
#include <svx/svdoutl.hxx>
#include <svx/svdobj.hxx>
#include <svx/svdview.hxx>
#include <editeng/outliner.hxx>
#include <editeng/unoforou.hxx>
#include <editeng/unoviwou.hxx>
#include <editeng/outlobj.hxx>
#include <svx/svdotext.hxx>
#include <svx/svdpage.hxx>
#include <editeng/editeng.hxx>
 
#include <editeng/unotext.hxx>
#include <com/sun/star/linguistic2/LinguServiceManager.hpp>
#include <comphelper/processfactory.hxx>
#include <svx/svdotable.hxx>
#include <cell.hxx>
#include <unotools/configmgr.hxx>
 
 
// SvxTextEditSourceImpl
 
 
class SvxTextEditSourceImpl : public SfxListener, public SfxBroadcaster, public sdr::ObjectUser
{
private:
    oslInterlockedCount maRefCount;
 
    SdrObject*                      mpObject;           // TTTT could be reference (?)
    SdrText*                        mpText;
    SdrView*                        mpView;
    VclPtr<const OutputDevice>      mpWindow;
    SdrModel*                       mpModel;            // TTTT probably not needed -> use SdrModel from SdrObject (?)
    std::unique_ptr<SdrOutliner>    mpOutliner;
    std::unique_ptr<SvxOutlinerForwarder> mpTextForwarder;
    std::unique_ptr<SvxDrawOutlinerViewForwarder> mpViewForwarder;    // if non-NULL, use GetViewModeTextForwarder text forwarder
    css::uno::Reference< css::linguistic2::XLinguServiceManager2 > m_xLinguServiceManager;
    Point                           maTextOffset;
    bool                            mbDataValid;
    bool                            mbIsLocked;
    bool                            mbNeedsUpdate;
    bool                            mbOldUndoMode;
    bool                            mbForwarderIsEditMode;      // have to reflect that, since ENDEDIT can happen more often
    bool                            mbShapeIsEditMode;          // only true, if SdrHintKind::BeginEdit was received
    bool                            mbNotificationsDisabled;    // prevent EditEngine/Outliner notifications (e.g. when setting up forwarder)
    bool                            mbNotifyEditOutlinerSet;
 
    SvxUnoTextRangeBaseVec          mvTextRanges;
 
    SvxTextForwarder*               GetBackgroundTextForwarder();
    SvxTextForwarder*               GetEditModeTextForwarder();
    std::unique_ptr<SvxDrawOutlinerViewForwarder> CreateViewForwarder();
 
    void                            SetupOutliner();
 
    bool                            HasView() const { return mpView != nullptr; }
    bool                            IsEditMode() const
                                    {
                                        if (!mbShapeIsEditMode)
                                            return false;
                                        SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>( mpObject  );
                                        return pTextObj && pTextObj->IsTextEditActive();
                                    }
 
    void                            dispose();
 
public:
    SvxTextEditSourceImpl( SdrObject* pObject, SdrText* pText );
    SvxTextEditSourceImpl( SdrObject& rObject, SdrText* pText, SdrView& rView, const OutputDevice& rWindow );
    virtual ~SvxTextEditSourceImpl() override;
 
    void acquire();
    void release();
 
    virtual void            Notify( SfxBroadcaster& rBC, const SfxHint& rHint ) override;
 
    SvxTextForwarder*       GetTextForwarder();
    SvxEditViewForwarder*   GetEditViewForwarder( bool );
    void                    UpdateData();
 
    void addRange( SvxUnoTextRangeBase* pNewRange );
    void removeRange( SvxUnoTextRangeBase* pOldRange );
    const SvxUnoTextRangeBaseVec& getRanges() const { return mvTextRanges;}
 
    void                    lock();
    void                    unlock();
 
    bool                    IsValid() const;
 
    Point                   LogicToPixel( const Point&, const MapMode& rMapMode );
    Point                   PixelToLogic( const Point&, const MapMode& rMapMode );
 
    DECL_LINK( NotifyHdl, EENotify&, void );
 
    virtual void ObjectInDestruction(const SdrObject& rObject) override;
 
    void                    UpdateOutliner();
};
 
 
SvxTextEditSourceImpl::SvxTextEditSourceImpl( SdrObject* pObject, SdrText* pText )
  : maRefCount      ( 0 ),
    mpObject        ( pObject ),
    mpText          ( pText ),
    mpView          ( nullptr ),
    mpWindow        ( nullptr ),
    mpModel         ( pObject ? &pObject->getSdrModelFromSdrObject() : nullptr ), // TTTT should be reference
    mbDataValid     ( false ),
    mbIsLocked      ( false ),
    mbNeedsUpdate   ( false ),
    mbOldUndoMode   ( false ),
    mbForwarderIsEditMode ( false ),
    mbShapeIsEditMode     ( false ),
    mbNotificationsDisabled ( false ),
    mbNotifyEditOutlinerSet ( false )
{
    DBG_ASSERT( mpObject, "invalid pObject!" );
 
    if( !mpText )
    {
        SdrTextObj* pTextObj = dynamic_cast< SdrTextObj* >( mpObject );
        if( pTextObj )
            mpText = pTextObj->getText( 0 );
    }
 
    if( mpModel )
        StartListening( *mpModel );
 
    if( mpObject )
        mpObject->AddObjectUser( *this );
}
 
 
SvxTextEditSourceImpl::SvxTextEditSourceImpl( SdrObject& rObject, SdrText* pText, SdrView& rView, const OutputDevice& rWindow )
  : maRefCount      ( 0 ),
    mpObject        ( &rObject ),
    mpText          ( pText ),
    mpView          ( &rView ),
    mpWindow        ( &rWindow ),
    mpModel         ( &rObject.getSdrModelFromSdrObject() ), // TTTT should be reference
    mbDataValid     ( false ),
    mbIsLocked      ( false ),
    mbNeedsUpdate   ( false ),
    mbOldUndoMode   ( false ),
    mbForwarderIsEditMode ( false ),
    mbShapeIsEditMode     ( true ),
    mbNotificationsDisabled ( false ),
    mbNotifyEditOutlinerSet ( false )
{
    if( !mpText )
    {
        SdrTextObj* pTextObj = dynamic_cast< SdrTextObj* >( mpObject );
        if( pTextObj )
            mpText = pTextObj->getText( 0 );
    }
 
    StartListening( *mpModel );
    StartListening( *mpView );
    mpObject->AddObjectUser( *this );
 
    // Init edit mode state from shape info (IsTextEditActive())
    mbShapeIsEditMode = IsEditMode();
}
 
 
SvxTextEditSourceImpl::~SvxTextEditSourceImpl()
{
    DBG_ASSERT( !mbIsLocked, "text edit source was not unlocked before dispose!" );
    if( mpObject )
        mpObject->RemoveObjectUser( *this );
 
    dispose();
}
 
 
void SvxTextEditSourceImpl::addRange( SvxUnoTextRangeBase* pNewRange )
{
    if( pNewRange )
        if( std::find( mvTextRanges.begin(), mvTextRanges.end(), pNewRange ) == mvTextRanges.end() )
            mvTextRanges.push_back( pNewRange );
}
 
 
void SvxTextEditSourceImpl::removeRange( SvxUnoTextRangeBase* pOldRange )
{
    if( pOldRange )
        mvTextRanges.erase( std::remove(mvTextRanges.begin(), mvTextRanges.end(), pOldRange), mvTextRanges.end() );
}
 
 
void SvxTextEditSourceImpl::acquire()
{
    osl_atomic_increment( &maRefCount );
}
 
 
void SvxTextEditSourceImpl::release()
{
    if( ! osl_atomic_decrement( &maRefCount ) )
        delete this;
}
 
void SvxTextEditSourceImpl::Notify(SfxBroadcaster& rBC, const SfxHint& rHint)
{
    // #i105988 keep reference to this object
    rtl::Reference< SvxTextEditSourceImpl > xThis( this );
 
    if (SfxHintId::Dying == rHint.GetId())
    {
        if (&rBC == mpView)
        {
            mpView = nullptr;
            mpViewForwarder.reset();
        }
    }
    else if (rHint.GetId() == SfxHintId::ThisIsAnSdrHint)
    {
        const SdrHint* pSdrHint = static_cast<const SdrHint*>(&rHint);
        switch( pSdrHint->GetKind() )
        {
            case SdrHintKind::ObjectChange:
            {
                mbDataValid = false;                        // Text has to be get again
 
                if( HasView() )
                {
                    // Update maTextOffset, object has changed
                    // Cannot call that here, since TakeTextRect() (called from there)
                    // changes outliner content.
                    // UpdateOutliner();
 
                    // Broadcast object changes, as they might change visible attributes
                    SvxViewChangedHint aHint;
                    Broadcast( aHint );
                }
                break;
            }
 
            case SdrHintKind::BeginEdit:
                if( mpObject == pSdrHint->GetObject() )
                {
                    // Once SdrHintKind::BeginEdit is broadcast, each EditSource of
                    // AccessibleCell will handle it here and call below:
                    // mpView->GetTextEditOutliner()->SetNotifyHdl(), which
                    // will replace the Notifier for current editable cell. It
                    // is totally wrong. So add check here to avoid the
                    // incorrect replacement of notifier.
 
                    // Currently it only happens on the editsource of
                    // AccessibleCell
                    if (mpObject && mpText)
                    {
                        sdr::table::SdrTableObj* pTableObj = dynamic_cast< sdr::table::SdrTableObj* >( mpObject );
                        if(pTableObj)
                        {
                            const sdr::table::CellRef& xCell = pTableObj->getActiveCell();
                            if (xCell.is())
                            {
                                sdr::table::Cell* pCellObj = dynamic_cast< sdr::table::Cell* >( mpText );
                                if (pCellObj && xCell.get() != pCellObj)
                                    break;
                            }
                        }
                    }
                    // invalidate old forwarder
                    if( !mbForwarderIsEditMode )
                    {
                        mpTextForwarder.reset();
                    }
 
                    // register as listener - need to broadcast state change messages
                    if( mpView && mpView->GetTextEditOutliner() )
                    {
                        mpView->GetTextEditOutliner()->SetNotifyHdl( LINK(this, SvxTextEditSourceImpl, NotifyHdl) );
                        mbNotifyEditOutlinerSet = true;
                    }
 
                    // Only now we're really in edit mode
                    mbShapeIsEditMode = true;
 
                    Broadcast( *pSdrHint );
                }
                break;
 
            case SdrHintKind::EndEdit:
                if( mpObject == pSdrHint->GetObject() )
                {
                    Broadcast( *pSdrHint );
 
                    // We're no longer in edit mode
                    mbShapeIsEditMode = false;
 
                    // remove as listener - outliner might outlive ourselves
                    if( mpView && mpView->GetTextEditOutliner() )
                    {
                        mpView->GetTextEditOutliner()->SetNotifyHdl( Link<EENotify&,void>() );
                        mbNotifyEditOutlinerSet = false;
                    }
 
                    // destroy view forwarder, OutlinerView no longer
                    // valid (no need for UpdateData(), it's been
                    // synched on SdrEndTextEdit)
                    mpViewForwarder.reset();
 
                    // Invalidate text forwarder, we might
                    // not be called again before entering edit mode a
                    // second time! Then, the old outliner might be
                    // invalid.
                    if( mbForwarderIsEditMode )
                    {
                        mbForwarderIsEditMode = false;
                        mpTextForwarder.reset();
                    }
                }
                break;
 
            case SdrHintKind::ModelCleared:
                dispose();
                break;
            default:
                break;
        }
    }
    else if (const SvxViewChangedHint* pViewHint = dynamic_cast<const SvxViewChangedHint*>(&rHint))
    {
        Broadcast( *pViewHint );
    }
}
 
/* this is a callback from the attached SdrObject when it is actually deleted */
void SvxTextEditSourceImpl::ObjectInDestruction(const SdrObject&)
{
    mpObject = nullptr;
    dispose();
    Broadcast( SfxHint( SfxHintId::Dying ) );
}
 
/* unregister at all objects and set all references to 0 */
void SvxTextEditSourceImpl::dispose()
{
    mpTextForwarder.reset();
    mpViewForwarder.reset();
 
    if( mpOutliner )
    {
        if( mpModel )
        {
            mpModel->disposeOutliner( std::move(mpOutliner) );
        }
        else
        {
            mpOutliner.reset();
        }
    }
 
    if( mpModel )
    {
        EndListening( *mpModel );
        mpModel = nullptr;
    }
 
    if( mpView )
    {
        // remove as listener - outliner might outlive ourselves
        if (mbNotifyEditOutlinerSet && mpView->GetTextEditOutliner())
        {
            mpView->GetTextEditOutliner()->SetNotifyHdl(Link<EENotify&,void>());
            mbNotifyEditOutlinerSet = false;
        }
        EndListening( *mpView );
        mpView = nullptr;
    }
 
    if( mpObject )
    {
        mpObject->RemoveObjectUser( *this );
        mpObject = nullptr;
    }
    mpWindow = nullptr;
}
 
 
void SvxTextEditSourceImpl::SetupOutliner()
{
    // only for UAA edit source: setup outliner equivalently as in
    // SdrTextObj::Paint(), such that formatting equals screen
    // layout
    if( !(mpObject && mpOutliner) )
        return;
 
    SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>( mpObject  );
    if( pTextObj )
    {
        tools::Rectangle aPaintRect;
        tools::Rectangle aBoundRect( pTextObj->GetCurrentBoundRect() );
        pTextObj->SetupOutlinerFormatting( *mpOutliner, aPaintRect );
 
        // calc text offset from shape anchor
        maTextOffset = aPaintRect.TopLeft() - aBoundRect.TopLeft();
    }
}
 
 
void SvxTextEditSourceImpl::UpdateOutliner()
{
    // only for UAA edit source: update outliner equivalently as in
    // SdrTextObj::Paint(), such that formatting equals screen
    // layout
    if( !(mpObject && mpOutliner) )
        return;
 
    SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>( mpObject  );
    if( pTextObj )
    {
        tools::Rectangle aPaintRect;
        tools::Rectangle aBoundRect( pTextObj->GetCurrentBoundRect() );
        pTextObj->UpdateOutlinerFormatting( *mpOutliner, aPaintRect );
 
        // calc text offset from shape anchor
        maTextOffset = aPaintRect.TopLeft() - aBoundRect.TopLeft();
    }
}
 
 
SvxTextForwarder* SvxTextEditSourceImpl::GetBackgroundTextForwarder()
{
    bool bCreated = false;
 
    // prevent EE/Outliner notifications during setup
    mbNotificationsDisabled = true;
 
    if (!mpTextForwarder)
    {
        if( mpOutliner == nullptr )
        {
            SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>( mpObject  );
            OutlinerMode nOutlMode = OutlinerMode::TextObject;
            if( pTextObj && pTextObj->IsTextFrame() && pTextObj->GetTextKind() == SdrObjKind::OutlineText )
                nOutlMode = OutlinerMode::OutlineObject;
 
            mpOutliner = mpModel->createOutliner( nOutlMode );
 
            // Do the setup after outliner creation, would be useless otherwise
            if( HasView() )
            {
                // Setup outliner _before_ filling it
                SetupOutliner();
            }
 
            mpOutliner->SetTextObjNoInit( pTextObj );
            if( mbIsLocked )
            {
                const_cast<EditEngine*>(&(mpOutliner->GetEditEngine()))->SetUpdateLayout( false );
                mbOldUndoMode = mpOutliner->GetEditEngine().IsUndoEnabled();
                const_cast<EditEngine*>(&(mpOutliner->GetEditEngine()))->EnableUndo( false );
            }
 
            if (!utl::ConfigManager::IsFuzzing())
            {
                if ( !m_xLinguServiceManager.is() )
                {
                    css::uno::Reference< css::uno::XComponentContext > xContext( ::comphelper::getProcessComponentContext() );
                    m_xLinguServiceManager.set(css::linguistic2::LinguServiceManager::create(xContext));
                }
 
                css::uno::Reference< css::linguistic2::XHyphenator > xHyphenator = m_xLinguServiceManager->getHyphenator();
                if( xHyphenator.is() )
                    mpOutliner->SetHyphenator( xHyphenator );
            }
        }
 
 
        mpTextForwarder.reset(new SvxOutlinerForwarder( *mpOutliner, (mpObject->GetObjInventor() == SdrInventor::Default) && (mpObject->GetObjIdentifier() == SdrObjKind::OutlineText) ));
        // delay listener subscription and UAA initialization until Outliner is fully setup
        bCreated = true;
 
        mbForwarderIsEditMode = false;
        mbDataValid = false;
    }
 
    if( mpObject && mpText && !mbDataValid && mpObject->IsInserted() && mpObject->getSdrPageFromSdrObject() )
    {
        mpTextForwarder->flushCache();
 
        std::optional<OutlinerParaObject> pOutlinerParaObject;
        SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>( mpObject  );
        if( pTextObj && pTextObj->getActiveText() == mpText )
            pOutlinerParaObject = pTextObj->CreateEditOutlinerParaObject(); // Get the OutlinerParaObject if text edit is active
        bool bOwnParaObj(false);
 
        if( pOutlinerParaObject )
            bOwnParaObj = true; // text edit active
        else if (mpText->GetOutlinerParaObject())
            pOutlinerParaObject = *mpText->GetOutlinerParaObject();
 
        if( pOutlinerParaObject && ( bOwnParaObj || !mpObject->IsEmptyPresObj() || mpObject->getSdrPageFromSdrObject()->IsMasterPage() ) )
        {
            mpOutliner->SetText( *pOutlinerParaObject );
 
            // put text to object and set EmptyPresObj to FALSE
            if( mpText && bOwnParaObj && mpObject->IsEmptyPresObj() && pTextObj->IsReallyEdited() )
            {
                mpObject->SetEmptyPresObj( false );
                static_cast< SdrTextObj* >( mpObject)->NbcSetOutlinerParaObjectForText( pOutlinerParaObject, mpText );
 
                // #i103982# Here, due to mpObject->NbcSetOutlinerParaObjectForText, we LOSE ownership of the
                // OPO, so do NOT delete it when leaving this method (!)
                bOwnParaObj = false;
            }
        }
        else
        {
            bool bVertical = pOutlinerParaObject && pOutlinerParaObject->IsEffectivelyVertical();
 
            // set objects style sheet on empty outliner
            SfxStyleSheetPool* pPool = static_cast<SfxStyleSheetPool*>(mpObject->getSdrModelFromSdrObject().GetStyleSheetPool());
            if( pPool )
                mpOutliner->SetStyleSheetPool( pPool );
 
            SfxStyleSheet* pStyleSheet = mpObject->getSdrPageFromSdrObject()->GetTextStyleSheetForObject( mpObject );
            if( pStyleSheet )
                mpOutliner->SetStyleSheet( 0, pStyleSheet );
 
            if( bVertical )
            {
                mpOutliner->SetVertical( pOutlinerParaObject->GetVertical());
                mpOutliner->SetRotation( pOutlinerParaObject->GetRotation());
            }
        }
 
        // maybe we have to set the border attributes
        if (mpOutliner->GetParagraphCount()==1)
        {
            // if we only have one paragraph we check if it is empty
            OUString aStr(mpOutliner->GetText(mpOutliner->GetParagraph(0)));
 
            if (aStr.isEmpty())
            {
                // its empty, so we have to force the outliner to initialise itself
                mpOutliner->SetText( "", mpOutliner->GetParagraph( 0 ) );
 
                if(mpObject->GetStyleSheet())
                    mpOutliner->SetStyleSheet( 0, mpObject->GetStyleSheet());
            }
        }
 
        mbDataValid = true;
    }
 
    if( bCreated && mpOutliner && HasView() )
    {
        // register as listener - need to broadcast state change messages
        // registration delayed until outliner is completely set up
        mpOutliner->SetNotifyHdl( LINK(this, SvxTextEditSourceImpl, NotifyHdl) );
    }
 
    // prevent EE/Outliner notifications during setup
    mbNotificationsDisabled = false;
 
    return mpTextForwarder.get();
}
 
 
SvxTextForwarder* SvxTextEditSourceImpl::GetEditModeTextForwarder()
{
    if( !mpTextForwarder && HasView() )
    {
        SdrOutliner* pEditOutliner = mpView->GetTextEditOutliner();
 
        if( pEditOutliner )
        {
            mpTextForwarder.reset(new SvxOutlinerForwarder( *pEditOutliner, (mpObject->GetObjInventor() == SdrInventor::Default) && (mpObject->GetObjIdentifier() == SdrObjKind::OutlineText) ));
            mbForwarderIsEditMode = true;
        }
    }
 
    return mpTextForwarder.get();
}
 
 
SvxTextForwarder* SvxTextEditSourceImpl::GetTextForwarder()
{
    if( mpObject == nullptr )
        return nullptr;
 
    if( mpModel == nullptr )
        mpModel = &mpObject->getSdrModelFromSdrObject();
 
    // distinguish the cases
    // a) connected to view, maybe edit mode is active, can work directly on the EditOutliner
    // b) background Outliner, reflect changes into ParaOutlinerObject (this is exactly the old UNO code)
    if( HasView() )
    {
        if( IsEditMode() != mbForwarderIsEditMode )
        {
            // forwarder mismatch - create new
            mpTextForwarder.reset();
        }
 
        if( IsEditMode() )
            return GetEditModeTextForwarder();
        else
            return GetBackgroundTextForwarder();
    }
    else
    {
        // tdf#123470 if the text edit mode of the shape is active, then we
        // cannot trust a previously cached TextForwarder state as the text may
        // be out of date, so force a refetch in that case, unless locked against
        // changes
        if (IsEditMode() && mpTextForwarder && !mbIsLocked)
        {
            assert(!mbForwarderIsEditMode); // because without a view there is no other option except !mbForwarderIsEditMode
            bool bTextEditActive = false;
            SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>(mpObject);
            // similar to the GetBackgroundTextForwarder check, see if the text edit is active
            if (pTextObj && pTextObj->getActiveText() == mpText && pTextObj->CanCreateEditOutlinerParaObject())
                bTextEditActive = true; // text edit active
            if (bTextEditActive)
                mbDataValid = false;
        }
 
        return GetBackgroundTextForwarder();
    }
}
 
std::unique_ptr<SvxDrawOutlinerViewForwarder> SvxTextEditSourceImpl::CreateViewForwarder()
{
    if( mpView->GetTextEditOutlinerView() && mpObject )
    {
        // register as listener - need to broadcast state change messages
        mpView->GetTextEditOutliner()->SetNotifyHdl( LINK(this, SvxTextEditSourceImpl, NotifyHdl) );
        mbNotifyEditOutlinerSet = true;
 
        SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>( mpObject  );
        if( pTextObj )
        {
            tools::Rectangle aBoundRect( pTextObj->GetCurrentBoundRect() );
            OutlinerView& rOutlView = *mpView->GetTextEditOutlinerView();
 
            return std::unique_ptr<SvxDrawOutlinerViewForwarder>(new SvxDrawOutlinerViewForwarder( rOutlView, aBoundRect.TopLeft() ));
        }
    }
 
    return nullptr;
}
 
SvxEditViewForwarder* SvxTextEditSourceImpl::GetEditViewForwarder( bool bCreate )
{
    if( mpObject == nullptr )
        return nullptr;
 
    if( mpModel == nullptr )
        mpModel = &mpObject->getSdrModelFromSdrObject();
 
    // shall we delete?
    if( mpViewForwarder )
    {
        if( !IsEditMode() )
        {
            // destroy all forwarders (no need for UpdateData(),
            // it's been synched on SdrEndTextEdit)
            mpViewForwarder.reset();
        }
    }
    // which to create? Directly in edit mode, create new, or none?
    else if( mpView )
    {
        if( IsEditMode() )
        {
            // create new view forwarder
            mpViewForwarder = CreateViewForwarder();
        }
        else if( bCreate )
        {
            // dispose old text forwarder
            UpdateData();
 
            mpTextForwarder.reset();
 
            // enter edit mode
            mpView->SdrEndTextEdit();
 
            if(mpView->SdrBeginTextEdit(mpObject))
            {
                SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>( mpObject  );
                if (pTextObj && pTextObj->IsTextEditActive())
                {
                    // create new view forwarder
                    mpViewForwarder = CreateViewForwarder();
                }
                else
                {
                    // failure. Somehow, SdrBeginTextEdit did not set
                    // our SdrTextObj into edit mode
                    mpView->SdrEndTextEdit();
                }
            }
        }
    }
 
    return mpViewForwarder.get();
}
 
 
void SvxTextEditSourceImpl::UpdateData()
{
    // if we have a view and in edit mode, we're working with the
    // DrawOutliner. Thus, all changes made on the text forwarder are
    // reflected on the view and committed to the model on
    // SdrEndTextEdit(). Thus, no need for explicit updates here.
    if( HasView() && IsEditMode() )
        return;
 
    if( mbIsLocked  )
    {
        mbNeedsUpdate = true;
    }
    else
    {
        if( mpOutliner && mpObject && mpText )
        {
            SdrTextObj* pTextObj = dynamic_cast< SdrTextObj* >( mpObject );
            if( pTextObj )
            {
                if( (mpOutliner->GetParagraphCount() == 1 && mpOutliner->GetEditEngine().GetTextLen( 0 ) == 0 )
                        || (mpOutliner->GetParagraphCount() == 2 && mpOutliner->GetEditEngine().GetTextLen( 0 ) == 0
                            && mpOutliner->GetEditEngine().GetTextLen( 1 ) == 0) )
                {
                    pTextObj->NbcSetOutlinerParaObjectForText( std::nullopt, mpText );
                }
                else
                {
                    pTextObj->NbcSetOutlinerParaObjectForText( mpOutliner->CreateParaObject(), mpText );
                }
            }
 
            if( mpObject->IsEmptyPresObj() )
                mpObject->SetEmptyPresObj(false);
        }
    }
}
 
void SvxTextEditSourceImpl::lock()
{
    // if this assert ever fires, we will need to make this a counter instead of a boolean
    assert(!mbIsLocked && "cannot nest these loc() calls");
    mbIsLocked = true;
    if( mpOutliner )
    {
        const_cast<EditEngine*>(&(mpOutliner->GetEditEngine()))->SetUpdateLayout( false );
        mbOldUndoMode = mpOutliner->GetEditEngine().IsUndoEnabled();
        const_cast<EditEngine*>(&(mpOutliner->GetEditEngine()))->EnableUndo( false );
    }
}
 
void SvxTextEditSourceImpl::unlock()
{
    mbIsLocked = false;
 
    if( mbNeedsUpdate )
    {
        UpdateData();
        mbNeedsUpdate = false;
    }
 
    if( mpOutliner )
    {
        const_cast<EditEngine*>(&(mpOutliner->GetEditEngine()))->SetUpdateLayout( true );
        const_cast<EditEngine*>(&(mpOutliner->GetEditEngine()))->EnableUndo( mbOldUndoMode );
    }
}
 
bool SvxTextEditSourceImpl::IsValid() const
{
    return mpView && mpWindow;
}
 
Point SvxTextEditSourceImpl::LogicToPixel( const Point& rPoint, const MapMode& rMapMode )
{
    // The responsibilities of ViewForwarder happen to be
    // somewhat mixed in this case. On the one hand, we need the
    // different interface queries on the SvxEditSource interface,
    // since we need both VisAreas. On the other hand, if an
    // EditViewForwarder exists, maTextOffset does not remain static,
    // but may change with every key press.
    if( IsEditMode() )
    {
        SvxEditViewForwarder* pForwarder = GetEditViewForwarder(false);
 
        if( pForwarder )
            return pForwarder->LogicToPixel( rPoint, rMapMode );
    }
    else if( IsValid() && mpModel )
    {
        Point aPoint1( rPoint );
        aPoint1.AdjustX(maTextOffset.X() );
        aPoint1.AdjustY(maTextOffset.Y() );
 
        Point aPoint2( OutputDevice::LogicToLogic( aPoint1, rMapMode,
                                                   MapMode(mpModel->GetScaleUnit()) ) );
        MapMode aMapMode(mpWindow->GetMapMode());
        aMapMode.SetOrigin(Point());
        return mpWindow->LogicToPixel( aPoint2, aMapMode );
    }
 
    return Point();
}
 
Point SvxTextEditSourceImpl::PixelToLogic( const Point& rPoint, const MapMode& rMapMode )
{
    // The responsibilities of ViewForwarder happen to be
    // somewhat mixed in this case. On the one hand, we need the
    // different interface queries on the SvxEditSource interface,
    // since we need both VisAreas. On the other hand, if an
    // EditViewForwarder exists, maTextOffset does not remain static,
    // but may change with every key press.
    if( IsEditMode() )
    {
        SvxEditViewForwarder* pForwarder = GetEditViewForwarder(false);
 
        if( pForwarder )
            return pForwarder->PixelToLogic( rPoint, rMapMode );
    }
    else if( IsValid() && mpModel )
    {
        MapMode aMapMode(mpWindow->GetMapMode());
        aMapMode.SetOrigin(Point());
        Point aPoint1( mpWindow->PixelToLogic( rPoint, aMapMode ) );
        Point aPoint2( OutputDevice::LogicToLogic( aPoint1,
                                                   MapMode(mpModel->GetScaleUnit()),
                                                   rMapMode ) );
        aPoint2.AdjustX( -(maTextOffset.X()) );
        aPoint2.AdjustY( -(maTextOffset.Y()) );
 
        return aPoint2;
    }
 
    return Point();
}
 
IMPL_LINK(SvxTextEditSourceImpl, NotifyHdl, EENotify&, rNotify, void)
{
    if( !mbNotificationsDisabled )
    {
        std::unique_ptr< SfxHint > aHint( SvxEditSourceHelper::EENotification2Hint( &rNotify) );
 
        if (aHint)
            Broadcast(*aHint);
    }
}
 
SvxTextEditSource::SvxTextEditSource( SdrObject* pObject, SdrText* pText )
{
    mpImpl = new SvxTextEditSourceImpl( pObject, pText );
}
 
 
SvxTextEditSource::SvxTextEditSource( SdrObject& rObj, SdrText* pText, SdrView& rView, const OutputDevice& rWindow )
{
    mpImpl = new SvxTextEditSourceImpl( rObj, pText, rView, rWindow );
}
 
 
SvxTextEditSource::SvxTextEditSource( SvxTextEditSourceImpl* pImpl )
{
    mpImpl = pImpl;
}
 
 
SvxTextEditSource::~SvxTextEditSource()
{
    ::SolarMutexGuard aGuard;
    mpImpl.clear();
}
 
 
std::unique_ptr<SvxEditSource> SvxTextEditSource::Clone() const
{
    return std::unique_ptr<SvxEditSource>(new SvxTextEditSource( mpImpl.get() ));
}
 
 
SvxTextForwarder* SvxTextEditSource::GetTextForwarder()
{
    return mpImpl->GetTextForwarder();
}
 
 
SvxEditViewForwarder* SvxTextEditSource::GetEditViewForwarder( bool bCreate )
{
    return mpImpl->GetEditViewForwarder( bCreate );
}
 
 
SvxViewForwarder* SvxTextEditSource::GetViewForwarder()
{
    return this;
}
 
 
void SvxTextEditSource::UpdateData()
{
    mpImpl->UpdateData();
}
 
SfxBroadcaster& SvxTextEditSource::GetBroadcaster() const
{
    return *mpImpl;
}
 
void SvxTextEditSource::lock()
{
    mpImpl->lock();
}
 
void SvxTextEditSource::unlock()
{
    mpImpl->unlock();
}
 
bool SvxTextEditSource::IsValid() const
{
    return mpImpl->IsValid();
}
 
Point SvxTextEditSource::LogicToPixel( const Point& rPoint, const MapMode& rMapMode ) const
{
    return mpImpl->LogicToPixel( rPoint, rMapMode );
}
 
Point SvxTextEditSource::PixelToLogic( const Point& rPoint, const MapMode& rMapMode ) const
{
    return mpImpl->PixelToLogic( rPoint, rMapMode );
}
 
void SvxTextEditSource::addRange( SvxUnoTextRangeBase* pNewRange )
{
    mpImpl->addRange( pNewRange );
}
 
void SvxTextEditSource::removeRange( SvxUnoTextRangeBase* pOldRange )
{
    mpImpl->removeRange( pOldRange );
}
 
const SvxUnoTextRangeBaseVec& SvxTextEditSource::getRanges() const
{
    return mpImpl->getRanges();
}
 
void SvxTextEditSource::UpdateOutliner()
{
    mpImpl->UpdateOutliner();
}
 
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */