richtextmodel.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 "richtextmodel.hxx"
#include "richtextengine.hxx"
#include "richtextunowrapper.hxx"
 
#include <property.hxx>
#include <services.hxx>
 
#include <com/sun/star/awt/LineEndFormat.hpp>
#include <com/sun/star/beans/PropertyAttribute.hpp>
#include <com/sun/star/form/FormComponentType.hpp>
#include <com/sun/star/text/WritingMode2.hpp>
#include <com/sun/star/style/VerticalAlignment.hpp>
 
#include <comphelper/guarding.hxx>
#include <comphelper/servicehelper.hxx>
#include <toolkit/awt/vclxdevice.hxx>
#include <toolkit/helper/vclunohelper.hxx>
#include <tools/debug.hxx>
#include <comphelper/diagnose_ex.hxx>
#include <editeng/editstat.hxx>
#include <vcl/outdev.hxx>
#include <vcl/svapp.hxx>
 
 
namespace frm
{
    using namespace ::com::sun::star::uno;
    using namespace ::com::sun::star::awt;
    using namespace ::com::sun::star::lang;
    using namespace ::com::sun::star::io;
    using namespace ::com::sun::star::beans;
    using namespace ::com::sun::star::form;
    using namespace ::com::sun::star::util;
    using namespace ::com::sun::star::style;
 
    namespace WritingMode2 = ::com::sun::star::text::WritingMode2;
 
    ORichTextModel::ORichTextModel( const Reference< XComponentContext >& _rxFactory )
        :OControlModel       ( _rxFactory, OUString() )
        ,FontControlModel    ( true                          )
        ,m_pEngine           ( RichTextEngine::Create()      )
        ,m_bSettingEngineText( false                         )
        ,m_aModifyListeners  ( m_aMutex                      )
    {
        m_nClassId = FormComponentType::TEXTFIELD;
 
        getPropertyDefaultByHandle( PROPERTY_ID_DEFAULTCONTROL          ) >>= m_sDefaultControl;
        // Default to 'flat' instead of '3D Look' for form controls, but don't change
        // getPropertyDefaultByHandle, see tdf#152974
        m_nBorder = 2;
        getPropertyDefaultByHandle( PROPERTY_ID_ENABLED                 ) >>= m_bEnabled;
        getPropertyDefaultByHandle( PROPERTY_ID_ENABLEVISIBLE           ) >>= m_bEnableVisible;
        getPropertyDefaultByHandle( PROPERTY_ID_HARDLINEBREAKS          ) >>= m_bHardLineBreaks;
        getPropertyDefaultByHandle( PROPERTY_ID_HSCROLL                 ) >>= m_bHScroll;
        getPropertyDefaultByHandle( PROPERTY_ID_VSCROLL                 ) >>= m_bVScroll;
        getPropertyDefaultByHandle( PROPERTY_ID_READONLY                ) >>= m_bReadonly;
        getPropertyDefaultByHandle( PROPERTY_ID_PRINTABLE               ) >>= m_bPrintable;
        m_aAlign = getPropertyDefaultByHandle( PROPERTY_ID_ALIGN );
        getPropertyDefaultByHandle( PROPERTY_ID_ECHO_CHAR               ) >>= m_nEchoChar;
        getPropertyDefaultByHandle( PROPERTY_ID_MAXTEXTLEN              ) >>= m_nMaxTextLength;
        getPropertyDefaultByHandle( PROPERTY_ID_MULTILINE               ) >>= m_bMultiLine;
        getPropertyDefaultByHandle( PROPERTY_ID_RICH_TEXT               ) >>= m_bReallyActAsRichText;
        getPropertyDefaultByHandle( PROPERTY_ID_HIDEINACTIVESELECTION   ) >>= m_bHideInactiveSelection;
        getPropertyDefaultByHandle( PROPERTY_ID_LINEEND_FORMAT          ) >>= m_nLineEndFormat;
        getPropertyDefaultByHandle( PROPERTY_ID_WRITING_MODE            ) >>= m_nTextWritingMode;
        getPropertyDefaultByHandle( PROPERTY_ID_CONTEXT_WRITING_MODE    ) >>= m_nContextWritingMode;
 
        implInit();
    }
 
 
    ORichTextModel::ORichTextModel( const ORichTextModel* _pOriginal, const Reference< XComponentContext >& _rxFactory )
        :OControlModel       ( _pOriginal, _rxFactory, false )
        ,FontControlModel    ( _pOriginal                        )
        ,m_bSettingEngineText( false                             )
        ,m_aModifyListeners  ( m_aMutex                          )
    {
 
        m_aTabStop               = _pOriginal->m_aTabStop;
        m_aBackgroundColor       = _pOriginal->m_aBackgroundColor;
        m_aBorderColor           = _pOriginal->m_aBorderColor;
        m_aVerticalAlignment     = _pOriginal->m_aVerticalAlignment;
        m_sDefaultControl        = _pOriginal->m_sDefaultControl;
        m_sHelpText              = _pOriginal->m_sHelpText;
        m_sHelpURL               = _pOriginal->m_sHelpURL;
        m_nBorder                = _pOriginal->m_nBorder;
        m_bEnabled               = _pOriginal->m_bEnabled;
        m_bEnableVisible         = _pOriginal->m_bEnableVisible;
        m_bHardLineBreaks        = _pOriginal->m_bHardLineBreaks;
        m_bHScroll               = _pOriginal->m_bHScroll;
        m_bVScroll               = _pOriginal->m_bVScroll;
        m_bReadonly              = _pOriginal->m_bReadonly;
        m_bPrintable             = _pOriginal->m_bPrintable;
        m_bReallyActAsRichText   = _pOriginal->m_bReallyActAsRichText;
        m_bHideInactiveSelection = _pOriginal->m_bHideInactiveSelection;
        m_nLineEndFormat         = _pOriginal->m_nLineEndFormat;
        m_nTextWritingMode       = _pOriginal->m_nTextWritingMode;
        m_nContextWritingMode    = _pOriginal->m_nContextWritingMode;
 
        m_aAlign               = _pOriginal->m_aAlign;
        m_nEchoChar            = _pOriginal->m_nEchoChar;
        m_nMaxTextLength       = _pOriginal->m_nMaxTextLength;
        m_bMultiLine           = _pOriginal->m_bMultiLine;
 
        m_pEngine.reset(_pOriginal->m_pEngine->Clone());
        m_sLastKnownEngineText = m_pEngine->GetText();
 
        implInit();
    }
 
 
    void ORichTextModel::implInit()
    {
        OSL_ENSURE(m_pEngine, "ORichTextModel::implInit: where's the engine?");
        if (m_pEngine)
        {
            m_pEngine->SetModifyHdl( LINK( this, ORichTextModel, OnEngineContentModified ) );
 
            EEControlBits nEngineControlWord = m_pEngine->GetControlWord();
            nEngineControlWord = nEngineControlWord & ~EEControlBits::AUTOPAGESIZE;
            m_pEngine->SetControlWord( nEngineControlWord );
 
            rtl::Reference<VCLXDevice> pUnoRefDevice = new VCLXDevice;
            {
                SolarMutexGuard g;
                pUnoRefDevice->SetOutputDevice( m_pEngine->GetRefDevice() );
            }
            m_xReferenceDevice = pUnoRefDevice;
        }
 
        implDoAggregation();
        implRegisterProperties();
    }
 
 
    void ORichTextModel::implDoAggregation()
    {
        osl_atomic_increment( &m_refCount );
 
        {
            m_xAggregate = new ORichTextUnoWrapper( *m_pEngine, this );
            setAggregation( m_xAggregate );
            doSetDelegator();
        }
 
        osl_atomic_decrement( &m_refCount );
    }
 
 
    void ORichTextModel::implRegisterProperties()
    {
        registerProperty( PROPERTY_DEFAULTCONTROL, PROPERTY_ID_DEFAULTCONTROL, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_sDefaultControl, cppu::UnoType<decltype(m_sDefaultControl)>::get() );
        registerProperty( PROPERTY_HELPTEXT, PROPERTY_ID_HELPTEXT, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_sHelpText, cppu::UnoType<decltype(m_sHelpText)>::get() );
        registerProperty( PROPERTY_HELPURL, PROPERTY_ID_HELPURL, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_sHelpURL, cppu::UnoType<decltype(m_sHelpURL)>::get() );
        registerProperty( PROPERTY_ENABLED, PROPERTY_ID_ENABLED, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bEnabled, cppu::UnoType<decltype(m_bEnabled)>::get() );
        registerProperty( PROPERTY_ENABLEVISIBLE, PROPERTY_ID_ENABLEVISIBLE, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bEnableVisible, cppu::UnoType<decltype(m_bEnableVisible)>::get() );
        registerProperty( PROPERTY_BORDER, PROPERTY_ID_BORDER, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_nBorder, cppu::UnoType<decltype(m_nBorder)>::get() );
        registerProperty( PROPERTY_HARDLINEBREAKS, PROPERTY_ID_HARDLINEBREAKS, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bHardLineBreaks, cppu::UnoType<decltype(m_bHardLineBreaks)>::get() );
        registerProperty( PROPERTY_HSCROLL, PROPERTY_ID_HSCROLL, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bHScroll, cppu::UnoType<decltype(m_bHScroll)>::get() );
        registerProperty( PROPERTY_VSCROLL, PROPERTY_ID_VSCROLL, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bVScroll, cppu::UnoType<decltype(m_bVScroll)>::get() );
        registerProperty( PROPERTY_READONLY, PROPERTY_ID_READONLY, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bReadonly, cppu::UnoType<decltype(m_bReadonly)>::get() );
        registerProperty( PROPERTY_PRINTABLE, PROPERTY_ID_PRINTABLE, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bPrintable, cppu::UnoType<decltype(m_bPrintable)>::get() );
        registerProperty( PROPERTY_REFERENCE_DEVICE, PROPERTY_ID_REFERENCE_DEVICE, PropertyAttribute::BOUND | PropertyAttribute::TRANSIENT,
                          &m_xReferenceDevice, cppu::UnoType<decltype(m_xReferenceDevice)>::get() );
        registerProperty( PROPERTY_RICH_TEXT, PROPERTY_ID_RICH_TEXT, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bReallyActAsRichText, cppu::UnoType<decltype(m_bReallyActAsRichText)>::get() );
        registerProperty( PROPERTY_HIDEINACTIVESELECTION, PROPERTY_ID_HIDEINACTIVESELECTION, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bHideInactiveSelection, cppu::UnoType<decltype(m_bHideInactiveSelection)>::get() );
 
        registerMayBeVoidProperty( PROPERTY_TABSTOP, PROPERTY_ID_TABSTOP, PropertyAttribute::MAYBEVOID | PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                                   &m_aTabStop, cppu::UnoType<sal_Bool>::get() );
        registerMayBeVoidProperty( PROPERTY_BACKGROUNDCOLOR, PROPERTY_ID_BACKGROUNDCOLOR, PropertyAttribute::MAYBEVOID | PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                                   &m_aBackgroundColor, cppu::UnoType<sal_Int32>::get() );
        registerMayBeVoidProperty( PROPERTY_BORDERCOLOR, PROPERTY_ID_BORDERCOLOR, PropertyAttribute::MAYBEVOID | PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                                   &m_aBorderColor, cppu::UnoType<sal_Int32>::get() );
        registerMayBeVoidProperty( PROPERTY_VERTICAL_ALIGN, PROPERTY_ID_VERTICAL_ALIGN, PropertyAttribute::MAYBEVOID | PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                                   &m_aVerticalAlignment, cppu::UnoType<VerticalAlignment>::get() );
 
        // properties which exist only for compatibility with the css.swt.UnoControlEditModel,
        // since we replace the default implementation for this service
        registerProperty( PROPERTY_ECHO_CHAR, PROPERTY_ID_ECHO_CHAR, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_nEchoChar, cppu::UnoType<decltype(m_nEchoChar)>::get() );
        registerProperty( PROPERTY_MAXTEXTLEN, PROPERTY_ID_MAXTEXTLEN, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_nMaxTextLength, cppu::UnoType<decltype(m_nMaxTextLength)>::get() );
        registerProperty( PROPERTY_MULTILINE, PROPERTY_ID_MULTILINE, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_bMultiLine, cppu::UnoType<decltype(m_bMultiLine)>::get() );
        registerProperty( PROPERTY_TEXT, PROPERTY_ID_TEXT, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_sLastKnownEngineText, cppu::UnoType<decltype(m_sLastKnownEngineText)>::get() );
        registerProperty( PROPERTY_LINEEND_FORMAT, PROPERTY_ID_LINEEND_FORMAT, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_nLineEndFormat, cppu::UnoType<decltype(m_nLineEndFormat)>::get() );
        registerProperty( PROPERTY_WRITING_MODE, PROPERTY_ID_WRITING_MODE, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                          &m_nTextWritingMode, cppu::UnoType<decltype(m_nTextWritingMode)>::get() );
 
        registerProperty( PROPERTY_CONTEXT_WRITING_MODE, PROPERTY_ID_CONTEXT_WRITING_MODE, PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT |
                          PropertyAttribute::TRANSIENT, &m_nContextWritingMode, cppu::UnoType<decltype(m_nContextWritingMode)>::get() );
 
        registerMayBeVoidProperty( PROPERTY_ALIGN, PROPERTY_ID_ALIGN, PropertyAttribute::MAYBEVOID | PropertyAttribute::BOUND | PropertyAttribute::MAYBEDEFAULT,
                                   &m_aAlign, cppu::UnoType<sal_Int16>::get() );
    }
 
 
    ORichTextModel::~ORichTextModel( )
    {
        if ( !OComponentHelper::rBHelper.bDisposed )
        {
            acquire();
            dispose();
        }
        if (m_pEngine)
        {
            SolarMutexGuard g;
            m_pEngine.reset();
        }
    }
 
 
    Any SAL_CALL ORichTextModel::queryAggregation( const Type& _rType )
    {
        Any aReturn = ORichTextModel_BASE::queryInterface( _rType );
 
        if ( !aReturn.hasValue() )
            aReturn = OControlModel::queryAggregation( _rType );
 
        return aReturn;
    }
 
 
    IMPLEMENT_FORWARD_XTYPEPROVIDER2( ORichTextModel, OControlModel, ORichTextModel_BASE )
 
    OUString SAL_CALL ORichTextModel::getImplementationName()
    {
        return "com.sun.star.comp.forms.ORichTextModel";
    }
 
    Sequence< OUString > SAL_CALL ORichTextModel::getSupportedServiceNames()
    {
        Sequence< OUString > aOwnNames {
            FRM_SUN_COMPONENT_RICHTEXTCONTROL,
            "com.sun.star.text.TextRange",
            "com.sun.star.style.CharacterProperties",
            "com.sun.star.style.ParagraphProperties",
            "com.sun.star.style.CharacterPropertiesAsian",
            "com.sun.star.style.CharacterPropertiesComplex",
            "com.sun.star.style.ParagraphPropertiesAsian",
            "com.sun.star.style.ParagraphPropertiesComplex" };
 
        return ::comphelper::combineSequences(
            getAggregateServiceNames(),
            ::comphelper::concatSequences(
                OControlModel::getSupportedServiceNames_Static(),
                aOwnNames)
        );
    }
 
    css::uno::Reference< css::util::XCloneable > SAL_CALL ORichTextModel::createClone()
{
    rtl::Reference<ORichTextModel> pClone = new ORichTextModel(this, getContext());
    pClone->clonedFrom(this);
    return pClone;
}
 
 
    void SAL_CALL ORichTextModel::disposing()
    {
        m_aModifyListeners.disposeAndClear( EventObject( *this ) );
        OControlModel::disposing();
    }
 
 
    namespace
    {
        void lcl_removeProperty( Sequence< Property >& _rSeq, std::u16string_view _rPropertyName )
        {
            Property* pLoop = _rSeq.getArray();
            Property* pEnd = _rSeq.getArray() + _rSeq.getLength();
            while ( pLoop != pEnd )
            {
                if ( pLoop->Name == _rPropertyName )
                {
                    ::std::copy( pLoop + 1, pEnd, pLoop );
                    _rSeq.realloc( _rSeq.getLength() - 1 );
                    break;
                }
                ++pLoop;
            }
        }
    }
 
    void ORichTextModel::describeFixedProperties( Sequence< Property >& _rProps ) const
    {
        OControlModel::describeFixedProperties( _rProps );
        sal_Int32 nOldCount = _rProps.getLength();
        _rProps.realloc( nOldCount + 1);
        css::beans::Property* pProperties = _rProps.getArray() + nOldCount;
        *pProperties++ = css::beans::Property(PROPERTY_TABINDEX, PROPERTY_ID_TABINDEX, cppu::UnoType<sal_Int16>::get(), css::beans::PropertyAttribute::BOUND | css::beans::PropertyAttribute::MAYBEDEFAULT);
        DBG_ASSERT( pProperties == _rProps.getArray() + _rProps.getLength(), "<...>::describeFixedProperties/getInfoHelper: forgot to adjust the count ?");
 
        // properties which the OPropertyContainerHelper is responsible for
        Sequence< Property > aContainedProperties;
        describeProperties( aContainedProperties );
 
        // properties which the FontControlModel is responsible for
        Sequence< Property > aFontProperties;
        describeFontRelatedProperties( aFontProperties );
 
        _rProps = concatSequences( aContainedProperties, aFontProperties, _rProps );
    }
 
 
    void ORichTextModel::describeAggregateProperties( Sequence< Property >& _rAggregateProps ) const
    {
        OControlModel::describeAggregateProperties( _rAggregateProps );
 
        // our aggregate (the SvxUnoText) declares a FontDescriptor property, as does
        // our FormControlFont base class. We remove it from the base class' sequence
        // here, and later on care for both instances being in sync
        lcl_removeProperty( _rAggregateProps, PROPERTY_FONT );
 
        // similar, the WritingMode property is declared in our aggregate, too, but we override
        // it, since the aggregate does no proper PropertyState handling.
        lcl_removeProperty( _rAggregateProps, PROPERTY_WRITING_MODE );
    }
 
 
    void SAL_CALL ORichTextModel::getFastPropertyValue( Any& _rValue, sal_Int32 _nHandle ) const
    {
        if ( isRegisteredProperty( _nHandle ) )
        {
            OPropertyContainerHelper::getFastPropertyValue( _rValue, _nHandle );
        }
        else if ( isFontRelatedProperty( _nHandle ) )
        {
            FontControlModel::getFastPropertyValue( _rValue, _nHandle );
        }
        else
        {
            OControlModel::getFastPropertyValue( _rValue, _nHandle );
        }
    }
 
 
    sal_Bool SAL_CALL ORichTextModel::convertFastPropertyValue( Any& _rConvertedValue, Any& _rOldValue, sal_Int32 _nHandle, const Any& _rValue )
    {
        bool bModified = false;
 
        if ( isRegisteredProperty( _nHandle ) )
        {
            bModified = OPropertyContainerHelper::convertFastPropertyValue( _rConvertedValue, _rOldValue, _nHandle, _rValue );
        }
        else if ( isFontRelatedProperty( _nHandle ) )
        {
            bModified = FontControlModel::convertFastPropertyValue( _rConvertedValue, _rOldValue, _nHandle, _rValue );
        }
        else
        {
            bModified = OControlModel::convertFastPropertyValue( _rConvertedValue, _rOldValue, _nHandle, _rValue );
        }
 
        return bModified;
    }
 
 
    void SAL_CALL ORichTextModel::setFastPropertyValue_NoBroadcast( sal_Int32 _nHandle, const Any& _rValue )
    {
        if ( isRegisteredProperty( _nHandle ) )
        {
            OPropertyContainerHelper::setFastPropertyValue( _nHandle, _rValue );
 
            switch ( _nHandle )
            {
            case PROPERTY_ID_REFERENCE_DEVICE:
            {
            #if OSL_DEBUG_LEVEL > 0
                MapMode aOldMapMode = m_pEngine->GetRefDevice()->GetMapMode();
            #endif
 
                OutputDevice* pRefDevice = VCLUnoHelper::GetOutputDevice( m_xReferenceDevice );
                OSL_ENSURE( pRefDevice, "ORichTextModel::setFastPropertyValue_NoBroadcast: empty reference device?" );
                m_pEngine->SetRefDevice( pRefDevice );
 
            #if OSL_DEBUG_LEVEL > 0
                MapMode aNewMapMode = m_pEngine->GetRefDevice()->GetMapMode();
                OSL_ENSURE( aNewMapMode.GetMapUnit() == aOldMapMode.GetMapUnit(),
                    "ORichTextModel::setFastPropertyValue_NoBroadcast: You should not tamper with the MapUnit of the ref device!" );
                // if this assertion here is triggered, then we would need to adjust all
                // items in all text portions in all paragraphs in the attributes of the EditEngine,
                // as long as they are MapUnit-dependent. This holds at least for the FontSize.
            #endif
            }
            break;
 
            case PROPERTY_ID_TEXT:
            {
                MutexRelease aReleaseMutex( m_aMutex );
                impl_smlock_setEngineText( m_sLastKnownEngineText );
            }
            break;
            }   // switch ( _nHandle )
        }
        else if ( isFontRelatedProperty( _nHandle ) )
        {
            FontControlModel::setFastPropertyValue_NoBroadcast_impl(
                    *this, &ORichTextModel::setDependentFastPropertyValue,
                    _nHandle, _rValue);
        }
        else
        {
            switch ( _nHandle )
            {
            case PROPERTY_ID_WRITING_MODE:
            {
                // forward to our aggregate, so the EditEngine knows about it
                if ( m_xAggregateSet.is() )
                    m_xAggregateSet->setPropertyValue( "WritingMode", _rValue );
            }
            break;
 
            default:
                OControlModel::setFastPropertyValue_NoBroadcast( _nHandle, _rValue );
                break;
            }
        }
    }
 
    // note tdf#152974, we can't simply change a default here because properties
    // that match the default are not exported, so for compatibility these
    // can't be changed without some sort of solution for that
    Any ORichTextModel::getPropertyDefaultByHandle( sal_Int32 _nHandle ) const
    {
        Any aDefault;
 
        switch ( _nHandle )
        {
        case PROPERTY_ID_WRITING_MODE:
        case PROPERTY_ID_CONTEXT_WRITING_MODE:
            aDefault <<= WritingMode2::CONTEXT;
            break;
 
        case PROPERTY_ID_LINEEND_FORMAT:
            aDefault <<= sal_Int16(LineEndFormat::LINE_FEED);
            break;
 
        case PROPERTY_ID_ECHO_CHAR:
        case PROPERTY_ID_ALIGN:
        case PROPERTY_ID_MAXTEXTLEN:
            aDefault <<= sal_Int16(0);
            break;
 
        case PROPERTY_ID_TABSTOP:
        case PROPERTY_ID_BACKGROUNDCOLOR:
        case PROPERTY_ID_BORDERCOLOR:
        case PROPERTY_ID_VERTICAL_ALIGN:
            /* void */
            break;
 
        case PROPERTY_ID_ENABLED:
        case PROPERTY_ID_ENABLEVISIBLE:
        case PROPERTY_ID_PRINTABLE:
        case PROPERTY_ID_HIDEINACTIVESELECTION:
            aDefault <<= true;
            break;
 
        case PROPERTY_ID_HARDLINEBREAKS:
        case PROPERTY_ID_HSCROLL:
        case PROPERTY_ID_VSCROLL:
        case PROPERTY_ID_READONLY:
        case PROPERTY_ID_MULTILINE:
        case PROPERTY_ID_RICH_TEXT:
            aDefault <<= false;
            break;
 
        case PROPERTY_ID_DEFAULTCONTROL:
            aDefault <<= OUString(FRM_SUN_CONTROL_RICHTEXTCONTROL);
            break;
 
        case PROPERTY_ID_HELPTEXT:
        case PROPERTY_ID_HELPURL:
        case PROPERTY_ID_TEXT:
            aDefault <<= OUString();
            break;
 
        case PROPERTY_ID_BORDER:
            aDefault <<= sal_Int16(1);
            break;
 
        default:
            if ( isFontRelatedProperty( _nHandle ) )
                aDefault = FontControlModel::getPropertyDefaultByHandle( _nHandle );
            else
                aDefault = OControlModel::getPropertyDefaultByHandle( _nHandle );
        }
 
        return aDefault;
    }
 
 
    void ORichTextModel::impl_smlock_setEngineText( const OUString& _rText )
    {
        if (m_pEngine)
        {
            SolarMutexGuard aSolarGuard;
            m_bSettingEngineText = true;
            m_pEngine->SetText( _rText );
            m_bSettingEngineText = false;
        }
    }
 
 
    OUString SAL_CALL ORichTextModel::getServiceName()
    {
        return FRM_SUN_COMPONENT_RICHTEXTCONTROL;
    }
 
 
    RichTextEngine* ORichTextModel::getEditEngine( const Reference< XControlModel >& _rxModel )
    {
        RichTextEngine* pEngine = nullptr;
 
        Reference< XUnoTunnel > xTunnel( _rxModel, UNO_QUERY );
        OSL_ENSURE( xTunnel.is(), "ORichTextModel::getEditEngine: invalid model!" );
        if ( xTunnel.is() )
        {
            try
            {
                pEngine = comphelper::getSomething_cast<RichTextEngine>(xTunnel->getSomething(getUnoTunnelId()));
            }
            catch( const Exception& )
            {
                TOOLS_WARN_EXCEPTION( "forms.richtext", "ORichTextModel::getEditEngine" );
            }
        }
        return pEngine;
    }
 
 
    const Sequence<sal_Int8> & ORichTextModel::getUnoTunnelId()
    {
        static const comphelper::UnoIdInit aId;
        return aId.getSeq();
    }
 
 
    IMPL_LINK_NOARG( ORichTextModel, OnEngineContentModified, LinkParamNone*, void )
    {
        if ( !m_bSettingEngineText )
        {
            m_aModifyListeners.notifyEach( &XModifyListener::modified, EventObject( *this ) );
 
            potentialTextChange();
                // is this a good idea? It may become expensive in case of larger texts,
                // and this method here is called for every single changed character ...
                // On the other hand, the API *requires* us to notify changes in the "Text"
                // property immediately ...
        }
    }
 
 
    sal_Int64 SAL_CALL ORichTextModel::getSomething( const Sequence< sal_Int8 >& _rId )
    {
        if (comphelper::isUnoTunnelId<ORichTextModel>(_rId))
            return comphelper::getSomething_cast(m_pEngine.get()); // Note returning a different type
 
        Reference< XUnoTunnel > xAggTunnel;
        if ( query_aggregation( m_xAggregate, xAggTunnel ) )
            return xAggTunnel->getSomething( _rId );
 
        return 0;
    }
 
 
    void SAL_CALL ORichTextModel::addModifyListener( const Reference< XModifyListener >& _rxListener )
    {
        m_aModifyListeners.addInterface( _rxListener );
    }
 
 
    void SAL_CALL ORichTextModel::removeModifyListener( const Reference< XModifyListener >& _rxListener )
    {
        m_aModifyListeners.removeInterface( _rxListener );
    }
 
 
    void ORichTextModel::potentialTextChange( )
    {
        OUString sCurrentEngineText;
        if (m_pEngine)
            sCurrentEngineText = m_pEngine->GetText();
 
        if ( sCurrentEngineText != m_sLastKnownEngineText )
        {
            sal_Int32 nHandle = PROPERTY_ID_TEXT;
            Any aOldValue; aOldValue <<= m_sLastKnownEngineText;
            Any aNewValue; aNewValue <<= sCurrentEngineText;
            fire( &nHandle, &aNewValue, &aOldValue, 1, false );
 
            m_sLastKnownEngineText = sCurrentEngineText;
        }
    }
 
 
} // namespace frm
 
 
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
com_sun_star_comp_forms_ORichTextModel_get_implementation(css::uno::XComponentContext* context,
                                                          css::uno::Sequence<css::uno::Any> const &)
{
    return cppu::acquire(new frm::ORichTextModel(context));
}
 
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