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 * Copyright 2008 by Sun Microsystems, Inc.
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 * OpenOffice.org - a multi-platform office productivity suite
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 * $RCSfile: implcanvas.cxx,v $
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_cppcanvas.hxx"

#include <rtl/ustring.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/tools/canvastools.hxx>

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

#include <canvas/canvastools.hxx>
#include <cppcanvas/polypolygon.hxx>

#include "implfont.hxx"
#include "implcolor.hxx"
#include "implcanvas.hxx"


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

namespace cppcanvas
{
    namespace internal
    {

        ImplCanvas::ImplCanvas( const uno::Reference< rendering::XCanvas >& xCanvas ) :
            maViewState(),
            maClipPolyPolygon(),
            mxCanvas( xCanvas )
        {
            OSL_ENSURE( mxCanvas.is(), "Canvas::Canvas() invalid XCanvas" );

            ::canvas::tools::initViewState( maViewState );
        }

        ImplCanvas::~ImplCanvas()
        {
        }

        void ImplCanvas::setTransformation( const ::basegfx::B2DHomMatrix& rMatrix )
        {
            ::canvas::tools::setViewStateTransform( maViewState, rMatrix );
        }

        ::basegfx::B2DHomMatrix ImplCanvas::getTransformation() const
        {
            ::basegfx::B2DHomMatrix aMatrix;
            return ::canvas::tools::getViewStateTransform( aMatrix, 
                                                           maViewState );
        }
            
        void ImplCanvas::setClip( const ::basegfx::B2DPolyPolygon& rClipPoly )
        {
            // TODO(T3): not thread-safe. B2DPolyPolygon employs copy-on-write
            maClipPolyPolygon.reset( rClipPoly );
            maViewState.Clip.clear();
        }

        void ImplCanvas::setClip()
        {
            maClipPolyPolygon.reset();
            maViewState.Clip.clear();
        }

        ::basegfx::B2DPolyPolygon const* ImplCanvas::getClip() const
        {
            return !maClipPolyPolygon ? NULL : &(*maClipPolyPolygon);
        }

        FontSharedPtr ImplCanvas::createFont( const ::rtl::OUString& rFontName, const double& rCellSize ) const
        {
            return FontSharedPtr( new ImplFont( getUNOCanvas(), rFontName, rCellSize ) );
        }
    
        ColorSharedPtr ImplCanvas::createColor() const
        {
            return ColorSharedPtr( new ImplColor( getUNOCanvas()->getDevice() ) );
        }

        CanvasSharedPtr ImplCanvas::clone() const
        {
            return CanvasSharedPtr( new ImplCanvas( *this ) );
        }
    
        void ImplCanvas::clear() const
        {
            OSL_ENSURE( mxCanvas.is(), "ImplCanvas::clear(): Invalid XCanvas" );
            mxCanvas->clear();
        }

        uno::Reference< rendering::XCanvas > ImplCanvas::getUNOCanvas() const
        {
            OSL_ENSURE( mxCanvas.is(), "ImplCanvas::getUNOCanvas(): Invalid XCanvas" );

            return mxCanvas;
        }

        rendering::ViewState ImplCanvas::getViewState() const
        {
            if( maClipPolyPolygon && !maViewState.Clip.is() )
            {
                if( !mxCanvas.is() )
                    return maViewState;

                maViewState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
                    mxCanvas->getDevice(),
                    *maClipPolyPolygon );
            }

            return maViewState;
        }

    }
}
