/* -*- 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 <com/sun/star/accessibility/AccessibleEventId.hpp>

#include <com/sun/star/uno/Any.h>

#include <comphelper/fileformat.h>

#include <comphelper/accessibletexthelper.hxx>

#include <comphelper/string.hxx>

#include <rtl/ustrbuf.hxx>

#include <rtl/ustring.hxx>

#include <sal/log.hxx>

#include <unotools/eventcfg.hxx>

#include <sfx2/event.hxx>

#include <sfx2/app.hxx>

#include <sfx2/bindings.hxx>

#include <sfx2/docfile.hxx>

#include <sfx2/docfilt.hxx>

#include <sfx2/msg.hxx>

#include <sfx2/objface.hxx>

#include <sfx2/printer.hxx>

#include <sfx2/request.hxx>

#include <sfx2/viewfrm.hxx>

#include <comphelper/classids.hxx>

#include <sot/formats.hxx>

#include <sot/storage.hxx>

#include <svl/eitem.hxx>

#include <svl/intitem.hxx>

#include <svl/itempool.hxx>

#include <svl/slstitm.hxx>

#include <svl/hint.hxx>

#include <svl/stritem.hxx>

#include <svl/undo.hxx>

#include <svl/whiter.hxx>

#include <vcl/mapmod.hxx>

#include <vcl/rendercontext/DrawModeFlags.hxx>

#include <vcl/virdev.hxx>

#include <tools/globname.hxx>

#include <tools/mapunit.hxx>

#include <vcl/settings.hxx>

#include <document.hxx>

#include <action.hxx>

#include <dialog.hxx>

#include <format.hxx>

#include <parse.hxx>

#include <starmath.hrc>

#include <strings.hrc>

#include <smmod.hxx>

#include <symbol.hxx>

#include <unomodel.hxx>

#include <utility.hxx>

#include <view.hxx>

#include "mathtype.hxx"

#include "ooxmlexport.hxx"

#include "ooxmlimport.hxx"

#include "rtfexport.hxx"

#include <mathmlimport.hxx>

#include <mathmlexport.hxx>

#include <svx/svxids.hrc>

#include <cursor.hxx>

#include <comphelper/diagnose_ex.hxx>

#include <visitors.hxx>

#include "accessibility.hxx"

#include <cfgitem.hxx>

#include <utility>

#include <oox/mathml/imexport.hxx>

#include <ElementsDockingWindow.hxx>

#include <smediteng.hxx>

#include <editeng/editund2.hxx>

#define ShellClass_SmDocShell

#include <smslots.hxx>

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

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

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

SFX_IMPL_SUPERCLASS_INTERFACE(SmDocShell, SfxObjectShell)

void SmDocShell::InitInterface_Impl()

{

    GetStaticInterface()->RegisterPopupMenu(u"view"_ustr);

}

void SmDocShell::SetSmSyntaxVersion(sal_Int16 nSmSyntaxVersion)

{

    mnSmSyntaxVersion = nSmSyntaxVersion;

    maParser.reset(starmathdatabase::GetVersionSmParser(mnSmSyntaxVersion));

}

SFX_IMPL_OBJECTFACTORY(SmDocShell, SvGlobalName(SO3_SM_CLASSID), u"smath"_ustr )

void SmDocShell::Notify(SfxBroadcaster&, const SfxHint& rHint)

{

    if (rHint.GetId() == SfxHintId::MathFormatChanged)

    {

        SetFormulaArranged(false);

        mnModifyCount++;     //! see comment for SID_GRAPHIC_SM in SmDocShell::GetState

        Repaint();

    }

}

void SmDocShell::LoadSymbols()

{

    SmModule::get()->GetSymbolManager().Load();

}

OUString SmDocShell::GetComment() const

{

    uno::Reference<document::XDocumentPropertiesSupplier> xDPS(

        GetModel(), uno::UNO_QUERY_THROW);

    uno::Reference<document::XDocumentProperties> xDocProps(

        xDPS->getDocumentProperties());

    return xDocProps->getDescription();

}

void SmDocShell::SetText(const OUString& rBuffer)

{

    if (rBuffer == maText)

        return;

    bool bIsEnabled = IsEnableSetModified();

    if( bIsEnabled )

        EnableSetModified( false );

    maText = rBuffer;

    SetFormulaArranged( false );

    Parse();

    SmViewShell *pViewSh = SmGetActiveView();

    if (pViewSh)

    {

        pViewSh->GetViewFrame().GetBindings().Invalidate(SID_TEXT);

        if ( SfxObjectCreateMode::EMBEDDED == GetCreateMode() )

        {

            // have SwOleClient::FormatChanged() to align the modified formula properly

            // even if the visible area does not change (e.g. when formula text changes from

            // "{a over b + c} over d" to "d over {a over b + c}"

            SfxGetpApp()->NotifyEvent(SfxEventHint( SfxEventHintId::VisAreaChanged, GlobalEventConfig::GetEventName(GlobalEventId::VISAREACHANGED), this));

            Repaint();

        }

        else

            pViewSh->GetGraphicWidget().Invalidate();

    }

    if ( bIsEnabled )

        EnableSetModified( bIsEnabled );

    SetModified();

    // launch accessible event if necessary

    SmGraphicAccessible *pAcc = pViewSh ? pViewSh->GetGraphicWidget().GetAccessible_Impl() : nullptr;

    if (pAcc)

    {

        Any aOldValue, aNewValue;

        if ( comphelper::OCommonAccessibleText::implInitTextChangedEvent( maText, rBuffer, aOldValue, aNewValue ) )

        {

            pAcc->LaunchEvent( AccessibleEventId::TEXT_CHANGED,

                    aOldValue, aNewValue );

        }

    }

    if ( GetCreateMode() == SfxObjectCreateMode::EMBEDDED )

        OnDocumentPrinterChanged(nullptr);

}

void SmDocShell::SetFormat(SmFormat const & rFormat)

{

    maFormat = rFormat;

    SetFormulaArranged( false );

    SetModified();

    mnModifyCount++;     //! see comment for SID_GRAPHIC_SM in SmDocShell::GetState

    // don't use SmGetActiveView since the view shell might not be active (0 pointer)

    // if for example the Basic Macro dialog currently has the focus. Thus:

    SfxViewFrame* pFrm = SfxViewFrame::GetFirst( this );

    while (pFrm)

    {

        pFrm->GetBindings().Invalidate(SID_GRAPHIC_SM);

        pFrm = SfxViewFrame::GetNext( *pFrm, this );

    }

}

OUString const & SmDocShell::GetAccessibleText()

{

    ArrangeFormula();

    if (maAccText.isEmpty())

    {

        OSL_ENSURE( mpTree, "Tree missing" );

        if (mpTree)

        {

            OUStringBuffer aBuf;

            mpTree->GetAccessibleText(aBuf);

            maAccText = aBuf.makeStringAndClear();

        }

    }

    return maAccText;

}

void SmDocShell::Parse()

{

    mpTree.reset();

    ReplaceBadChars();

    mpTree = maParser->Parse(maText);

    mnModifyCount++;     //! see comment for SID_GRAPHIC_SM in SmDocShell::GetState

    SetFormulaArranged( false );

    InvalidateCursor();

    maUsedSymbols = maParser->GetUsedSymbols();

}

void SmDocShell::ArrangeFormula()

{

    if (mbFormulaArranged)

        return;

    // Only for the duration of the existence of this object the correct settings

    // at the printer are guaranteed!

    SmPrinterAccess  aPrtAcc(*this);

    OutputDevice* pOutDev = aPrtAcc.GetRefDev();

    SAL_WARN_IF( !pOutDev, "starmath", "!! SmDocShell::ArrangeFormula: reference device missing !!");

    // if necessary get another OutputDevice for which we format

    if (!pOutDev)

    {

        if (SmViewShell *pView = SmGetActiveView())

            pOutDev = &pView->GetGraphicWidget().GetDrawingArea()->get_ref_device();

        else

        {

            pOutDev = &SmModule::get()->GetDefaultVirtualDev();

            pOutDev->SetMapMode( MapMode(SmMapUnit()) );

        }

    }

    OSL_ENSURE(pOutDev->GetMapMode().GetMapUnit() == SmMapUnit(),

               "Sm : wrong MapMode");

    const SmFormat &rFormat = GetFormat();

    mpTree->Prepare(rFormat, *this, 0);

    auto popIt = pOutDev->ScopedPush(vcl::PushFlags::TEXTLAYOUTMODE | vcl::PushFlags::TEXTLANGUAGE);

    // We want the device to always be LTR, we handle RTL formulas ourselves.

    bool bOldRTL = pOutDev->IsRTLEnabled();

    pOutDev->EnableRTL(false);

    // For RTL formulas, we want the brackets to be mirrored.

    bool bRTL = GetFormat().IsRightToLeft();

    pOutDev->SetLayoutMode(bRTL ? vcl::text::ComplexTextLayoutFlags::BiDiRtl

                                : vcl::text::ComplexTextLayoutFlags::Default);

    // Numbers should not be converted, for now.

    pOutDev->SetDigitLanguage( LANGUAGE_ENGLISH );

    // To get the current Math font in the format tab

    pOutDev->Push(vcl::PushFlags::FONT);

    pOutDev->SetFont(rFormat.GetFont(FNT_MATH));

    bool bSupportsMath = pOutDev->SupportsOpenTypeMath();

    pOutDev->Pop();

    if (bSupportsMath)

    {

        pOutDev->SetFont(rFormat.GetFont(FNT_MATH));

        mpTree->ArrangeOpenType(*pOutDev, rFormat);

    }

    else

        mpTree->Arrange(*pOutDev, rFormat);

    pOutDev->EnableRTL(bOldRTL);

    SetFormulaArranged(true);

    // invalidate accessible text

    maAccText.clear();

}

void SmDocShell::UpdateEditEngineDefaultFonts()

{

    SmEditEngine::setSmItemPool(mpEditEngineItemPool.get(), maLinguOptions);

}

EditEngine& SmDocShell::GetEditEngine()

{

    if (!mpEditEngine)

    {

        //!

        //! see also SmEditWindow::DataChanged !

        //!

        mpEditEngineItemPool = EditEngine::CreatePool();

        SmEditEngine::setSmItemPool(mpEditEngineItemPool.get(), maLinguOptions);

        mpEditEngine.reset( new SmEditEngine( mpEditEngineItemPool.get() ) );

        mpEditEngine->EraseVirtualDevice();

        // set initial text if the document already has some...

        // (may be the case when reloading a doc)

        OUString aTxt( GetText() );

        if (!aTxt.isEmpty())

            mpEditEngine->SetText( aTxt );

        mpEditEngine->ClearModifyFlag();

    }

    return *mpEditEngine;

}

void SmDocShell::DrawFormula(OutputDevice &rDev, Point &rPosition, bool bDrawSelection)

{

    if (!mpTree)

        Parse();

    OSL_ENSURE(mpTree, "Sm : NULL pointer");

    ArrangeFormula();

    bool bRTL = GetFormat().IsRightToLeft();

    // Problem: What happens to WYSIWYG? While we're active inplace, we don't have a reference

    // device and aren't aligned to that either. So now there can be a difference between the

    // VisArea (i.e. the size within the client) and the current size.

    // Idea: The difference could be adapted with SmNode::SetSize (no long-term solution)

    rPosition.AdjustX(maFormat.GetDistance( DIS_LEFTSPACE ) );

    rPosition.AdjustY(maFormat.GetDistance( DIS_TOPSPACE  ) );

    Point aPosition(rPosition);

    if (bRTL && rDev.GetOutDevType() != OUTDEV_WINDOW)

        aPosition.AdjustX(GetSize().Width()

                          - maFormat.GetDistance(DIS_LEFTSPACE)

                          - maFormat.GetDistance(DIS_RIGHTSPACE));

    //! in case of high contrast-mode (accessibility option!)

    //! the draw mode needs to be set to default, because when embedding

    //! Math for example in Calc in "a over b" the fraction bar may not

    //! be visible else. More generally: the FillColor may have been changed.

    DrawModeFlags nOldDrawMode = DrawModeFlags::Default;

    bool bRestoreDrawMode = false;

    if (OUTDEV_WINDOW == rDev.GetOutDevType() &&

        rDev.GetOwnerWindow()->GetSettings().GetStyleSettings().GetHighContrastMode())

    {

        nOldDrawMode = rDev.GetDrawMode();

        rDev.SetDrawMode( DrawModeFlags::Default );

        bRestoreDrawMode = true;

    }

    rDev.Push(vcl::PushFlags::TEXTLAYOUTMODE | vcl::PushFlags::TEXTLANGUAGE);

    // We want the device to always be LTR, we handle RTL formulas ourselves.

    bool bOldRTL = rDev.IsRTLEnabled();

    if (rDev.GetOutDevType() == OUTDEV_WINDOW)

        rDev.EnableRTL(bRTL);

    else

        rDev.EnableRTL(false);

    auto nLayoutFlags = vcl::text::ComplexTextLayoutFlags::Default;

    if (bRTL)

    {

        // For RTL formulas, we want the brackets to be mirrored.

        nLayoutFlags |= vcl::text::ComplexTextLayoutFlags::BiDiRtl;

        if (rDev.GetOutDevType() == OUTDEV_WINDOW)

            nLayoutFlags |= vcl::text::ComplexTextLayoutFlags::TextOriginLeft;

    }

    rDev.SetLayoutMode(nLayoutFlags);

    // Numbers should not be converted, for now.

    rDev.SetDigitLanguage( LANGUAGE_ENGLISH );

    //Set selection if any

    if(mpCursor && bDrawSelection){

        mpCursor->AnnotateSelection();

        SmSelectionDrawingVisitor(rDev, mpTree.get(), aPosition);

    }

    //Drawing using visitor

    SmDrawingVisitor(rDev, aPosition, mpTree.get(), GetFormat());

    rDev.EnableRTL(bOldRTL);

    rDev.Pop();

    if (bRestoreDrawMode)

        rDev.SetDrawMode( nOldDrawMode );

}

Size SmDocShell::GetSize()

{

    Size aRet;

    if (!mpTree)

        Parse();

    if (mpTree)

    {

        ArrangeFormula();

        aRet = mpTree->GetSize();

        if ( !aRet.Width() || aRet.Width() == 1 )

            aRet.setWidth( 2000 );

        else

            aRet.AdjustWidth(maFormat.GetDistance( DIS_LEFTSPACE ) +

                             maFormat.GetDistance( DIS_RIGHTSPACE ) );

        if ( !aRet.Height() )

            aRet.setHeight( 1000 );

        else

            aRet.AdjustHeight(maFormat.GetDistance( DIS_TOPSPACE ) +

                             maFormat.GetDistance( DIS_BOTTOMSPACE ) );

    }

    return aRet;

}

void SmDocShell::InvalidateCursor(){

    mpCursor.reset();

}

SmCursor& SmDocShell::GetCursor(){

    if(!mpCursor)

        mpCursor.reset(new SmCursor(mpTree.get(), this));

    return *mpCursor;

}

bool SmDocShell::HasCursor() const { return mpCursor != nullptr; }

SmPrinterAccess::SmPrinterAccess( SmDocShell &rDocShell )

{

    pPrinter = rDocShell.GetPrt();

    if ( pPrinter )

    {

        pPrinter->Push( vcl::PushFlags::MAPMODE );

        if ( SfxObjectCreateMode::EMBEDDED == rDocShell.GetCreateMode() )

        {

            // if it is an embedded object (without its own printer)

            // we change the MapMode temporarily.

            //!If it is a document with its own printer the MapMode should

            //!be set correctly (once) elsewhere(!), in order to avoid numerous

            //!superfluous pushing and popping of the MapMode when using

            //!this class.

            const MapUnit eOld = pPrinter->GetMapMode().GetMapUnit();

            if ( SmMapUnit() != eOld )

            {

                MapMode aMap( pPrinter->GetMapMode() );

                aMap.SetMapUnit( SmMapUnit() );

                Point aTmp( aMap.GetOrigin() );

                aTmp.setX( OutputDevice::LogicToLogic( aTmp.X(), eOld, SmMapUnit() ) );

                aTmp.setY( OutputDevice::LogicToLogic( aTmp.Y(), eOld, SmMapUnit() ) );

                aMap.SetOrigin( aTmp );

                pPrinter->SetMapMode( aMap );

            }

        }

    }

    pRefDev = rDocShell.GetRefDev();

    if ( !pRefDev || pPrinter.get() == pRefDev.get() )

        return;

    pRefDev->Push( vcl::PushFlags::MAPMODE );

    if ( SfxObjectCreateMode::EMBEDDED != rDocShell.GetCreateMode() )

        return;

    // if it is an embedded object (without its own printer)

    // we change the MapMode temporarily.

    //!If it is a document with its own printer the MapMode should

    //!be set correctly (once) elsewhere(!), in order to avoid numerous

    //!superfluous pushing and popping of the MapMode when using

    //!this class.

    const MapUnit eOld = pRefDev->GetMapMode().GetMapUnit();

    if ( SmMapUnit() != eOld )

    {

        MapMode aMap( pRefDev->GetMapMode() );

        aMap.SetMapUnit( SmMapUnit() );

        Point aTmp( aMap.GetOrigin() );

        aTmp.setX( OutputDevice::LogicToLogic( aTmp.X(), eOld, SmMapUnit() ) );

        aTmp.setY( OutputDevice::LogicToLogic( aTmp.Y(), eOld, SmMapUnit() ) );

        aMap.SetOrigin( aTmp );

        pRefDev->SetMapMode( aMap );

    }

}

SmPrinterAccess::~SmPrinterAccess()

{

    if ( pPrinter )

        pPrinter->Pop();

    if ( pRefDev && pRefDev != pPrinter )

        pRefDev->Pop();

}

Printer* SmDocShell::GetPrt()

{

    if (SfxObjectCreateMode::EMBEDDED == GetCreateMode())

    {

        // Normally the server provides the printer. But if it doesn't provide one (e.g. because

        // there is no connection) it still can be the case that we know the printer because it

        // has been passed on by the server in OnDocumentPrinterChanged and is being kept temporarily.

        Printer* pPrt = GetDocumentPrinter();

        if (!pPrt && mpTmpPrinter)

            pPrt = mpTmpPrinter;

        return pPrt;

    }

    else if (!mpPrinter)

    {

        auto pOptions = std::make_unique<SfxItemSet>(SfxItemSet::makeFixedSfxItemSet<

                SID_PRINTTITLE, SID_PRINTZOOM,

                SID_NO_RIGHT_SPACES, SID_SAVE_ONLY_USED_SYMBOLS,

                SID_AUTO_CLOSE_BRACKETS, SID_SMEDITWINDOWZOOM,

                SID_INLINE_EDIT_ENABLE, SID_INLINE_EDIT_ENABLE>(GetPool()));

        SmModule::get()->GetConfig()->ConfigToItemSet(*pOptions);

        mpPrinter = VclPtr<SfxPrinter>::Create(std::move(pOptions));

        mpPrinter->SetMapMode(MapMode(SmMapUnit()));

    }

    return mpPrinter;

}

OutputDevice* SmDocShell::GetRefDev()

{

    if (SfxObjectCreateMode::EMBEDDED == GetCreateMode())

    {

        OutputDevice* pOutDev = GetDocumentRefDev();

        if (pOutDev)

            return pOutDev;

    }

    return GetPrt();

}

void SmDocShell::SetPrinter( SfxPrinter *pNew )

{

    mpPrinter.disposeAndClear();

    mpPrinter = pNew;    //Transfer ownership

    mpPrinter->SetMapMode( MapMode(SmMapUnit()) );

    SetFormulaArranged(false);

    Repaint();

}

void SmDocShell::OnDocumentPrinterChanged( Printer *pPrt )

{

    mpTmpPrinter = pPrt;

    SetFormulaArranged(false);

    Size aOldSize = GetVisArea().GetSize();

    Repaint();

    if( aOldSize != GetVisArea().GetSize() && !maText.isEmpty() )

        SetModified();

    mpTmpPrinter = nullptr;

}

void SmDocShell::Repaint()

{

    bool bIsEnabled = IsEnableSetModified();

    if (bIsEnabled)

        EnableSetModified( false );

    SetFormulaArranged(false);

    Size aVisSize = GetSize();

    SetVisAreaSize(aVisSize);

    if (SmViewShell* pViewSh = SmGetActiveView())

        pViewSh->GetGraphicWidget().Invalidate();

    if (bIsEnabled)

        EnableSetModified(bIsEnabled);

}

SmDocShell::SmDocShell( SfxModelFlags i_nSfxCreationFlags )

    : SfxObjectShell(i_nSfxCreationFlags)

    , m_pMlElementTree(nullptr)

    , mpPrinter(nullptr)

    , mpTmpPrinter(nullptr)

    , mnModifyCount(0)

    , mbFormulaArranged(false)

{

    SvtLinguConfig().GetOptions(maLinguOptions);

    SetPool(&SfxGetpApp()->GetPool());

    auto* config = SmModule::get()->GetConfig();

    mnSmSyntaxVersion = config->GetDefaultSmSyntaxVersion();

    maFormat = config->GetStandardFormat();

    StartListening(maFormat);

    StartListening(*config);

    SetBaseModel(new SmModel(this));

    SetSmSyntaxVersion(mnSmSyntaxVersion);

    SetMapUnit(SmMapUnit());

}

SmDocShell::~SmDocShell()

{

    EndListening(maFormat);

    EndListening(*SmModule::get()->GetConfig());

    mpCursor.reset();

    mpEditEngine.reset();

    mpEditEngineItemPool.clear();

    mpPrinter.disposeAndClear();

    mathml::SmMlIteratorFree(m_pMlElementTree);

}

bool SmDocShell::ConvertFrom(SfxMedium &rMedium)

{

    bool     bSuccess = false;

    const OUString& rFltName = rMedium.GetFilter()->GetFilterName();

    OSL_ENSURE( rFltName != STAROFFICE_XML, "Wrong filter!");

    if ( rFltName == MATHML_XML )

    {

        if (mpTree)

        {

            mpTree.reset();

            InvalidateCursor();

        }

        rtl::Reference<SmModel> xModel(dynamic_cast<SmModel*>(GetModel().get()));

        SmXMLImportWrapper aEquation(xModel);

        aEquation.useHTMLMLEntities(true);

        bSuccess = ( ERRCODE_NONE == aEquation.Import(rMedium) );

    }

    else

    {

        SvStream *pStream = rMedium.GetInStream();

        if ( pStream )

        {

            if ( SotStorage::IsStorageFile( pStream ) )

            {

                rtl::Reference<SotStorage> aStorage = new SotStorage(pStream, false);

                if ( aStorage->IsStream(u"Equation Native"_ustr) )

                {

                    // is this a MathType Storage?

                    OUStringBuffer aBuffer;

                    MathType aEquation(aBuffer);

                    bSuccess = aEquation.Parse( aStorage.get() );

                    if ( bSuccess )

                    {

                        maText = aBuffer.makeStringAndClear();

                        Parse();

                    }

                }

            }

        }

    }

    if ( GetCreateMode() == SfxObjectCreateMode::EMBEDDED )

    {

        SetFormulaArranged( false );

        Repaint();

    }

    FinishedLoading();

    return bSuccess;

}

bool SmDocShell::InitNew( const uno::Reference < embed::XStorage >& xStorage )

{

    bool bRet = false;

    if ( SfxObjectShell::InitNew( xStorage ) )

    {

        bRet = true;

        SetVisArea(tools::Rectangle(Point(0, 0), Size(2000, 1000)));

    }

    return bRet;

}

bool SmDocShell::Load( SfxMedium& rMedium )

{

    bool bRet = false;

    if( SfxObjectShell::Load( rMedium ))

    {

        uno::Reference < embed::XStorage > xStorage = GetMedium()->GetStorage();

        if (xStorage->hasByName(u"content.xml"_ustr) && xStorage->isStreamElement(u"content.xml"_ustr))

        {

            // is this a fabulous math package ?

            rtl::Reference<SmModel> xModel(dynamic_cast<SmModel*>(GetModel().get()));

            SmXMLImportWrapper aEquation(xModel);

            auto nError = aEquation.Import(rMedium);

            bRet = ERRCODE_NONE == nError;

            SetError(nError);

        }

    }

    if ( GetCreateMode() == SfxObjectCreateMode::EMBEDDED )

    {

        SetFormulaArranged( false );

        Repaint();

    }

    FinishedLoading();

    return bRet;

}

bool SmDocShell::Save()

{

    //! apply latest changes if necessary

    UpdateText();

    if ( SfxObjectShell::Save() )

    {

        if (!mpTree)

            Parse();

        if( mpTree )

            ArrangeFormula();

        SmXMLExportWrapper aEquation(GetModel());

        aEquation.SetFlat(false);

        return aEquation.Export(*GetMedium());

    }

    return false;

}

/*

 * replace bad characters that can not be saved. (#i74144)

 * */

void SmDocShell::ReplaceBadChars()

{

    bool bReplace = false;

    if (!mpEditEngine)

        return;

    OUStringBuffer aBuf( mpEditEngine->GetText() );

    for (sal_Int32 i = 0;  i < aBuf.getLength();  ++i)

    {

        if (aBuf[i] < ' ' && aBuf[i] != '\r' && aBuf[i] != '\n' && aBuf[i] != '\t')

        {

            aBuf[i] = ' ';

            bReplace = true;

        }

    }

    if (bReplace)

        maText = aBuf.makeStringAndClear();

}

void SmDocShell::UpdateText()

{

    if (mpEditEngine && mpEditEngine->IsModified())

    {

        OUString aEngTxt( mpEditEngine->GetText() );

        if (GetText() != aEngTxt)

            SetText( aEngTxt );

    }

}

bool SmDocShell::SaveAs( SfxMedium& rMedium )

{

    bool bRet = false;

    //! apply latest changes if necessary

    UpdateText();

    if ( SfxObjectShell::SaveAs( rMedium ) )

    {

        if (!mpTree)

            Parse();

        if( mpTree )

            ArrangeFormula();

        SmXMLExportWrapper aEquation(GetModel());

        aEquation.SetFlat(false);

        bRet = aEquation.Export(rMedium);

    }

    return bRet;

}

bool SmDocShell::ConvertTo( SfxMedium &rMedium )

{

    bool bRet = false;

    std::shared_ptr<const SfxFilter> pFlt = rMedium.GetFilter();

    if( pFlt )

    {

        if( !mpTree )

            Parse();

        if( mpTree )

            ArrangeFormula();

        const OUString& rFltName = pFlt->GetFilterName();

        if(rFltName == STAROFFICE_XML)

        {

            SmXMLExportWrapper aEquation(GetModel());

            aEquation.SetFlat(false);

            bRet = aEquation.Export(rMedium);

        }

        else if(rFltName == MATHML_XML)

        {

            SmXMLExportWrapper aEquation(GetModel());

            aEquation.SetFlat(true);

            aEquation.SetUseHTMLMLEntities(true);

            bRet = aEquation.Export(rMedium);

        }

        else if (pFlt->GetFilterName() == "MathType 3.x")

            bRet = WriteAsMathType3( rMedium );

    }

    return bRet;

}

void SmDocShell::writeFormulaOoxml(

        ::sax_fastparser::FSHelperPtr const& pSerializer,

        oox::core::OoxmlVersion const version,

        oox::drawingml::DocumentType const documentType,

        const sal_Int8 nAlign)

{

    if( !mpTree )

        Parse();

    if( mpTree )

        ArrangeFormula();

    SmOoxmlExport aEquation(mpTree.get(), version, documentType,

                            o3tl::convert(maFormat.GetBaseSize().Height() * 2, SmO3tlLengthUnit(),

                                          o3tl::Length::pt));

    if(documentType == oox::drawingml::DOCUMENT_DOCX)

        aEquation.ConvertFromStarMath( pSerializer, nAlign);

    else

        aEquation.ConvertFromStarMath(pSerializer, oox::FormulaImExportBase::eFormulaAlign::INLINE);

}

void SmDocShell::writeFormulaRtf(OStringBuffer& rBuffer, rtl_TextEncoding nEncoding)

{

    if (!mpTree)

        Parse();

    if (mpTree)

        ArrangeFormula();

    SmRtfExport aEquation(mpTree.get());

    aEquation.ConvertFromStarMath(rBuffer, nEncoding);

}

void SmDocShell::readFormulaOoxml( oox::formulaimport::XmlStream& stream )

{

    SmOoxmlImport aEquation( stream );

    SetText( aEquation.ConvertToStarMath());

    mnOoxmlFontSizeInHalfPoints = aEquation.GetFontSizeInHalfPoints();

    SetFontSizeInHalfPoints(mnOoxmlFontSizeInHalfPoints);

}

void SmDocShell::SetFontSizeInHalfPoints(sal_Int32 nFontSize)

{

    if (nFontSize <= 0)

        return;

    SmFormat aFormat(GetFormat());

    Size aSize(aFormat.GetBaseSize());

    aSize.setHeight(o3tl::convert(nFontSize, o3tl::Length::pt, SmO3tlLengthUnit()) / 2);

    aFormat.SetBaseSizeAndFonts(aSize);

    SetFormat(aFormat);

}

void SmDocShell::Execute(SfxRequest& rReq)

{

    switch (rReq.GetSlot())

    {

        case SID_TEXTMODE:

        {

            SmFormat aOldFormat  = GetFormat();

            SmFormat aNewFormat( aOldFormat );

            aNewFormat.SetTextmode(!aOldFormat.IsTextmode());

            SfxUndoManager *pTmpUndoMgr = GetUndoManager();

            if (pTmpUndoMgr)

                pTmpUndoMgr->AddUndoAction(

                    std::make_unique<SmFormatAction>(this, aOldFormat, aNewFormat));

            SetFormat( aNewFormat );

            Repaint();

        }

        break;

        case SID_AUTO_REDRAW :

        {

            auto* config = SmModule::get()->GetConfig();

            config->SetAutoRedraw(!config->IsAutoRedraw());

        }

        break;

        case SID_LOADSYMBOLS:

            LoadSymbols();