canvasfont.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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
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#include <sal/config.h>
 
#include <basegfx/numeric/ftools.hxx>
#include <canvas/canvastools.hxx>
#include <com/sun/star/rendering/PanoseProportion.hpp>
#include <cppuhelper/supportsservice.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <rtl/math.hxx>
#include <vcl/metric.hxx>
#include <vcl/virdev.hxx>
 
#include "canvasfont.hxx"
#include "textlayout.hxx"
 
using namespace ::com::sun::star;
 
 
namespace vclcanvas
{
    CanvasFont::CanvasFont( const rendering::FontRequest&                   rFontRequest,
                            const uno::Sequence< beans::PropertyValue >&    rExtraFontProperties,
                            const geometry::Matrix2D&                       rFontMatrix,
                            rendering::XGraphicDevice&                      rDevice,
                            const OutDevProviderSharedPtr&                  rOutDevProvider ) :
        CanvasFont_Base( m_aMutex ),
        maFont( vcl::Font( rFontRequest.FontDescription.FamilyName,
                      rFontRequest.FontDescription.StyleName,
                      Size( 0, ::basegfx::fround(rFontRequest.CellSize) ) ) ),
        maFontRequest( rFontRequest ),
        mpRefDevice( &rDevice ),
        mpOutDevProvider( rOutDevProvider )
    {
        maFont->SetAlignment( ALIGN_BASELINE );
        maFont->SetCharSet( (rFontRequest.FontDescription.IsSymbolFont==css::util::TriState_YES) ? RTL_TEXTENCODING_SYMBOL : RTL_TEXTENCODING_UNICODE );
        maFont->SetVertical( rFontRequest.FontDescription.IsVertical==css::util::TriState_YES );
 
        // 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( LanguageTag::convertToLanguageType( rFontRequest.Locale, false));
 
        // adjust to stretched/shrunk 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 ).GetFontSize();
 
            const double fDividend( rFontMatrix.m10 + rFontMatrix.m11 );
            double fStretch = rFontMatrix.m00 + rFontMatrix.m01;
 
            if( !::basegfx::fTools::equalZero( fDividend) )
                fStretch /= fDividend;
 
            const ::tools::Long nNewWidth = ::basegfx::fround( aSize.Width() * fStretch );
 
            maFont->SetAverageFontWidth( nNewWidth );
 
            rOutDev.EnableMapMode(bOldMapState);
        }
 
        sal_uInt32 nEmphasisMark = 0;
 
        ::canvas::tools::extractExtraFontProperties(rExtraFontProperties, nEmphasisMark);
 
        if (nEmphasisMark)
            maFont->SetEmphasisMark(FontEmphasisMark(nEmphasisMark));
    }
 
    void SAL_CALL CanvasFont::disposing()
    {
        SolarMutexGuard aGuard;
 
        mpOutDevProvider.reset();
        mpRefDevice.clear();
    }
 
    uno::Reference< rendering::XTextLayout > SAL_CALL  CanvasFont::createTextLayout( const rendering::StringContext& aText, sal_Int8 nDirection, sal_Int64 )
    {
        SolarMutexGuard aGuard;
 
        if( !mpRefDevice.is() )
            return uno::Reference< rendering::XTextLayout >(); // we're disposed
 
        return new TextLayout( aText,
                               nDirection,
                               Reference( this ),
                               mpRefDevice,
                               mpOutDevProvider);
    }
 
    rendering::FontRequest SAL_CALL  CanvasFont::getFontRequest(  )
    {
        SolarMutexGuard aGuard;
 
        return maFontRequest;
    }
 
    rendering::FontMetrics SAL_CALL  CanvasFont::getFontMetrics(  )
    {
        SolarMutexGuard aGuard;
 
        OutputDevice& rOutDev = mpOutDevProvider->getOutDev();
        ScopedVclPtrInstance< VirtualDevice > pVDev( rOutDev );
        pVDev->SetFont(getVCLFont());
        const ::FontMetric& aMetric( pVDev->GetFontMetric() );
 
        return rendering::FontMetrics(
            aMetric.GetAscent(),
            aMetric.GetDescent(),
            aMetric.GetInternalLeading(),
            aMetric.GetExternalLeading(),
            0,
            aMetric.GetDescent() / 2.0,
            aMetric.GetAscent() / 2.0);
    }
 
    uno::Sequence< double > SAL_CALL  CanvasFont::getAvailableSizes(  )
    {
        // TODO(F1)
        return uno::Sequence< double >();
    }
 
    uno::Sequence< beans::PropertyValue > SAL_CALL  CanvasFont::getExtraFontProperties(  )
    {
        // TODO(F1)
        return uno::Sequence< beans::PropertyValue >();
    }
 
    OUString SAL_CALL CanvasFont::getImplementationName()
    {
        return "VCLCanvas::CanvasFont";
    }
 
    sal_Bool SAL_CALL CanvasFont::supportsService( const OUString& ServiceName )
    {
        return cppu::supportsService( this, ServiceName );
    }
 
    uno::Sequence< OUString > SAL_CALL CanvasFont::getSupportedServiceNames()
    {
        return { "com.sun.star.rendering.CanvasFont" };
    }
 
    vcl::Font const & CanvasFont::getVCLFont() const
    {
        return *maFont;
    }
}
 
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