libreoffice/canvas/source/vcl/canvasfont.cxx

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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_canvas.hxx"

#include <canvas/debug.hxx>

#include <rtl/math.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <i18npool/mslangid.hxx>
#include <vcl/metric.hxx>

#include <com/sun/star/rendering/PanoseProportion.hpp>

#include "canvasfont.hxx"
#include "textlayout.hxx"

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


namespace vclcanvas
{
    CanvasFont::CanvasFont( const rendering::FontRequest&                   rFontRequest,
                            const uno::Sequence< beans::PropertyValue >&    ,
                            const geometry::Matrix2D&                       rFontMatrix,
                            rendering::XGraphicDevice&                      rDevice,
                            const OutDevProviderSharedPtr&                  rOutDevProvider ) :
        CanvasFont_Base( m_aMutex ),
        maFont( Font( rFontRequest.FontDescription.FamilyName,
                      rFontRequest.FontDescription.StyleName,
                      Size( 0, ::basegfx::fround(rFontRequest.CellSize) ) ) ),
        maFontRequest( rFontRequest ),
        mpRefDevice( &rDevice ),
        mpOutDevProvider( rOutDevProvider )
    {
        maFont->SetAlign( ALIGN_BASELINE );
        maFont->SetCharSet( (rFontRequest.FontDescription.IsSymbolFont==com::sun::star::util::TriState_YES) ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE );
        maFont->SetVertical( (rFontRequest.FontDescription.IsVertical==com::sun::star::util::TriState_YES) ? TRUE : FALSE );

        // TODO(F2): improve panose->vclenum conversion
        maFont->SetWeight( static_cast<FontWeight>(rFontRequest.FontDescription.FontDescription.Weight) );
        maFont->SetItalic( (rFontRequest.FontDescription.FontDescription.Letterform<=8) ? ITALIC_NONE : ITALIC_NORMAL );
        maFont->SetPitch(
                rFontRequest.FontDescription.FontDescription.Proportion == rendering::PanoseProportion::MONO_SPACED
                    ? PITCH_FIXED : PITCH_VARIABLE);

        maFont->SetLanguage(MsLangId::convertLocaleToLanguage(rFontRequest.Locale));

        // adjust to stretched/shrinked font
        if( !::rtl::math::approxEqual( rFontMatrix.m00, rFontMatrix.m11) )
        {
            OutputDevice& rOutDev( rOutDevProvider->getOutDev() );

            const bool bOldMapState( rOutDev.IsMapModeEnabled() );
            rOutDev.EnableMapMode(FALSE);

            const Size aSize = rOutDev.GetFontMetric( *maFont ).GetSize();

            const double fDividend( rFontMatrix.m10 + rFontMatrix.m11 );
            double fStretch = (rFontMatrix.m00 + rFontMatrix.m01);

            if( !::basegfx::fTools::equalZero( fDividend) )
                fStretch /= fDividend;

            const long nNewWidth = ::basegfx::fround( aSize.Width() * fStretch );

            maFont->SetWidth( nNewWidth );

            rOutDev.EnableMapMode(bOldMapState);
        }
    }

    void SAL_CALL CanvasFont::disposing()
    {
        tools::LocalGuard aGuard;

        mpOutDevProvider.reset();
        mpRefDevice.clear();
    }

    uno::Reference< rendering::XTextLayout > SAL_CALL  CanvasFont::createTextLayout( const rendering::StringContext& aText, sal_Int8 nDirection, sal_Int64 nRandomSeed ) throw (uno::RuntimeException)
    {
        tools::LocalGuard aGuard;

        if( !mpRefDevice.is() )
            return uno::Reference< rendering::XTextLayout >(); // we're disposed

        return new TextLayout( aText,
                               nDirection,
                               nRandomSeed,
                               Reference( this ),
                               mpRefDevice,
                               mpOutDevProvider);
    }

    rendering::FontRequest SAL_CALL  CanvasFont::getFontRequest(  ) throw (uno::RuntimeException)
    {
        tools::LocalGuard aGuard;

        return maFontRequest;
    }

    rendering::FontMetrics SAL_CALL  CanvasFont::getFontMetrics(  ) throw (uno::RuntimeException)
    {
        tools::LocalGuard aGuard;

        OutputDevice& rOutDev = mpOutDevProvider->getOutDev();
        VirtualDevice aVDev( rOutDev );
        aVDev.SetFont(getVCLFont());
        const ::FontMetric& aMetric( aVDev.GetFontMetric() );

        return rendering::FontMetrics(
            aMetric.GetAscent(),
            aMetric.GetDescent(),
            aMetric.GetIntLeading(),
            aMetric.GetExtLeading(),
            0,
            aMetric.GetDescent() / 2.0,
            aMetric.GetAscent() / 2.0);
    }

    uno::Sequence< double > SAL_CALL  CanvasFont::getAvailableSizes(  ) throw (uno::RuntimeException)
    {
        tools::LocalGuard aGuard;

        // TODO(F1)
        return uno::Sequence< double >();
    }

    uno::Sequence< beans::PropertyValue > SAL_CALL  CanvasFont::getExtraFontProperties(  ) throw (uno::RuntimeException)
    {
        tools::LocalGuard aGuard;

        // TODO(F1)
        return uno::Sequence< beans::PropertyValue >();
    }

#define IMPLEMENTATION_NAME "VCLCanvas::CanvasFont"
#define SERVICE_NAME "com.sun.star.rendering.CanvasFont"

    ::rtl::OUString SAL_CALL CanvasFont::getImplementationName() throw( uno::RuntimeException )
    {
        return ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( IMPLEMENTATION_NAME ) );
    }

    sal_Bool SAL_CALL CanvasFont::supportsService( const ::rtl::OUString& ServiceName ) throw( uno::RuntimeException )
    {
        return ServiceName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( SERVICE_NAME ) );
    }

    uno::Sequence< ::rtl::OUString > SAL_CALL CanvasFont::getSupportedServiceNames()  throw( uno::RuntimeException )
    {
        uno::Sequence< ::rtl::OUString > aRet(1);
        aRet[0] = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM ( SERVICE_NAME ) );

        return aRet;
    }

    ::Font CanvasFont::getVCLFont() const
    {
        return *maFont;
    }
}