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 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
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 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basegfx.hxx"

#include <com/sun/star/geometry/AffineMatrix2D.hpp>
#include <com/sun/star/rendering/RenderState.hpp>
#include <com/sun/star/rendering/ViewState.hpp>
#include <com/sun/star/rendering/XCanvas.hpp>
#include <com/sun/star/rendering/CompositeOperation.hpp>

#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/range/b2drange.hxx>
#include <basegfx/range/b2drectangle.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/tools/canvastools.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <basegfx/tools/unopolypolygon.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>


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

namespace basegfx
{
namespace unotools
{
    UnoPolyPolygon::UnoPolyPolygon( const B2DPolyPolygon& rPolyPoly ) :
        UnoPolyPolygonBase( m_aMutex ),
        maPolyPoly( rPolyPoly ),
        meFillRule( rendering::FillRule_EVEN_ODD )
    {
        // or else races will haunt us.
        maPolyPoly.makeUnique();
    }

    void SAL_CALL UnoPolyPolygon::addPolyPolygon(
        const geometry::RealPoint2D& 						position, 
        const uno::Reference< rendering::XPolyPolygon2D >&	polyPolygon ) throw (lang::IllegalArgumentException,uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );
        modifying();

        // TODO(F1): Correctly fulfill the UNO API
        // specification. This will probably result in a vector of
        // poly-polygons to be stored in this object.

        const sal_Int32 nPolys( polyPolygon->getNumberOfPolygons() );

        if( !polyPolygon.is() || !nPolys )
        {
            // invalid or empty polygon - nothing to do.
            return;
        }

        B2DPolyPolygon        aSrcPoly;
        const UnoPolyPolygon* pSrc( dynamic_cast< UnoPolyPolygon* >(polyPolygon.get()) );

        // try to extract polygon data from interface. First,
        // check whether it's the same implementation object,
        // which we can tunnel then.
        if( pSrc )
        {
            aSrcPoly = pSrc->getPolyPolygon();
        }
        else
        {
            // not a known implementation object - try data source
            // interfaces
            uno::Reference< rendering::XBezierPolyPolygon2D > xBezierPoly(
                polyPolygon,
                uno::UNO_QUERY );

            if( xBezierPoly.is() )
            {
                aSrcPoly = unotools::polyPolygonFromBezier2DSequenceSequence(
                    xBezierPoly->getBezierSegments( 0,
                                                    nPolys,
                                                    0,
                                                    -1 ) );
            }
            else
            {
                uno::Reference< rendering::XLinePolyPolygon2D > xLinePoly(
                    polyPolygon,
                    uno::UNO_QUERY );

                // no implementation class and no data provider
                // found - contract violation.
                if( !xLinePoly.is() )
                    throw lang::IllegalArgumentException(
                        ::rtl::OUString( 
                            RTL_CONSTASCII_USTRINGPARAM(
                                "UnoPolyPolygon::addPolyPolygon(): Invalid input "
                                "poly-polygon, cannot retrieve vertex data")),
                        static_cast<cppu::OWeakObject*>(this), 1);

                aSrcPoly = unotools::polyPolygonFromPoint2DSequenceSequence(
                    xLinePoly->getPoints( 0,
                                          nPolys,
                                          0,
                                          -1 ) );
            }
        }

        const B2DRange	aBounds( tools::getRange( aSrcPoly ) );
        const B2DVector 	aOffset( unotools::b2DPointFromRealPoint2D( position ) -
                                             aBounds.getMinimum() );

        if( !aOffset.equalZero() )
        {
            const B2DHomMatrix aTranslate(tools::createTranslateB2DHomMatrix(aOffset));
            aSrcPoly.transform( aTranslate );
        }

        maPolyPoly.append( aSrcPoly );
    }

    sal_Int32 SAL_CALL UnoPolyPolygon::getNumberOfPolygons() throw (uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        return maPolyPoly.count();
    }

    sal_Int32 SAL_CALL UnoPolyPolygon::getNumberOfPolygonPoints( 
        sal_Int32 polygon ) throw (lang::IndexOutOfBoundsException,uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        checkIndex( polygon );

        return maPolyPoly.getB2DPolygon(polygon).count();
    }

    rendering::FillRule SAL_CALL UnoPolyPolygon::getFillRule() throw (uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        return meFillRule;
    }

    void SAL_CALL UnoPolyPolygon::setFillRule( 
        rendering::FillRule fillRule ) throw (uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        modifying();

        meFillRule = fillRule;
    }

    sal_Bool SAL_CALL UnoPolyPolygon::isClosed( 
        sal_Int32 index ) throw (lang::IndexOutOfBoundsException,uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        checkIndex( index );

        return maPolyPoly.getB2DPolygon(index).isClosed();
    }

    void SAL_CALL UnoPolyPolygon::setClosed(
        sal_Int32 index, 
        sal_Bool closedState ) throw (lang::IndexOutOfBoundsException,uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );
        modifying();
        
        if( index == -1L )
        {
            // set all
            maPolyPoly.setClosed( closedState );
        }
        else
        {
            checkIndex( index );

            // fetch referenced polygon, change state
            B2DPolygon aTmp( maPolyPoly.getB2DPolygon(index) );
            aTmp.setClosed( closedState );

            // set back to container
            maPolyPoly.setB2DPolygon( index, aTmp );
        }
    }

    uno::Sequence< uno::Sequence< geometry::RealPoint2D > > SAL_CALL UnoPolyPolygon::getPoints(
        sal_Int32 nPolygonIndex, 
        sal_Int32 nNumberOfPolygons, 
        sal_Int32 nPointIndex, 
        sal_Int32 nNumberOfPoints ) throw (lang::IndexOutOfBoundsException,uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );
        
        return unotools::pointSequenceSequenceFromB2DPolyPolygon( 
            getSubsetPolyPolygon( nPolygonIndex,
                                  nNumberOfPolygons,
                                  nPointIndex,
                                  nNumberOfPoints ) );
    }

    void SAL_CALL UnoPolyPolygon::setPoints( 
        const uno::Sequence< uno::Sequence< geometry::RealPoint2D > >& points, 
        sal_Int32 nPolygonIndex ) throw (lang::IndexOutOfBoundsException,uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );
        modifying();
        
        const B2DPolyPolygon& rNewPolyPoly( 
            unotools::polyPolygonFromPoint2DSequenceSequence( points ) );

        if( nPolygonIndex == -1 )
        {
            maPolyPoly = rNewPolyPoly;
        }
        else
        {
            checkIndex( nPolygonIndex );

            maPolyPoly.insert( nPolygonIndex, rNewPolyPoly );
        }
    }

    geometry::RealPoint2D SAL_CALL UnoPolyPolygon::getPoint( 
        sal_Int32 nPolygonIndex, 
        sal_Int32 nPointIndex ) throw (lang::IndexOutOfBoundsException,uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        checkIndex( nPolygonIndex );

        const B2DPolygon& rPoly( maPolyPoly.getB2DPolygon( nPolygonIndex ) );

        if( nPointIndex < 0 || nPointIndex >= static_cast<sal_Int32>(rPoly.count()) )
            throw lang::IndexOutOfBoundsException();

        return unotools::point2DFromB2DPoint( rPoly.getB2DPoint( nPointIndex ) );
    }

    void SAL_CALL UnoPolyPolygon::setPoint( 
        const geometry::RealPoint2D& point, 
        sal_Int32 nPolygonIndex, 
        sal_Int32 nPointIndex ) throw (lang::IndexOutOfBoundsException,uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        checkIndex( nPolygonIndex );
        modifying();

        B2DPolygon aPoly( maPolyPoly.getB2DPolygon( nPolygonIndex ) );

        if( nPointIndex < 0 || nPointIndex >= static_cast<sal_Int32>(aPoly.count()) )
            throw lang::IndexOutOfBoundsException();

        aPoly.setB2DPoint( nPointIndex,
                           unotools::b2DPointFromRealPoint2D( point ) );
        maPolyPoly.setB2DPolygon( nPolygonIndex, aPoly );
    }

    uno::Sequence< uno::Sequence< geometry::RealBezierSegment2D > > SAL_CALL UnoPolyPolygon::getBezierSegments( 
        sal_Int32 nPolygonIndex,
        sal_Int32 nNumberOfPolygons, 
        sal_Int32 nPointIndex, 
        sal_Int32 nNumberOfPoints ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        return unotools::bezierSequenceSequenceFromB2DPolyPolygon( 
            getSubsetPolyPolygon( nPolygonIndex,
                                  nNumberOfPolygons,
                                  nPointIndex,
                                  nNumberOfPoints ) );
    }

    void SAL_CALL UnoPolyPolygon::setBezierSegments( 
        const uno::Sequence< uno::Sequence< geometry::RealBezierSegment2D > >&	points, 
        sal_Int32 																nPolygonIndex ) throw (lang::IndexOutOfBoundsException, 
                                                                                                       uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        modifying();
        const B2DPolyPolygon& rNewPolyPoly( 
            unotools::polyPolygonFromBezier2DSequenceSequence( points ) );

        if( nPolygonIndex == -1 )
        {
            maPolyPoly = rNewPolyPoly;
        }
        else
        {
            checkIndex( nPolygonIndex );

            maPolyPoly.insert( nPolygonIndex, rNewPolyPoly );
        }
    }

    geometry::RealBezierSegment2D SAL_CALL UnoPolyPolygon::getBezierSegment( sal_Int32 nPolygonIndex, 
                                                                             sal_Int32 nPointIndex ) throw (lang::IndexOutOfBoundsException, 
                                                                                                            uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        checkIndex( nPolygonIndex );

        const B2DPolygon& rPoly( maPolyPoly.getB2DPolygon( nPolygonIndex ) );
		const sal_uInt32  nPointCount(rPoly.count());

        if( nPointIndex < 0 || nPointIndex >= static_cast<sal_Int32>(nPointCount) )
            throw lang::IndexOutOfBoundsException();

        const B2DPoint& rPt( rPoly.getB2DPoint( nPointIndex ) );
        const B2DPoint& rCtrl0( rPoly.getNextControlPoint(nPointIndex) );
        const B2DPoint& rCtrl1( rPoly.getPrevControlPoint((nPointIndex + 1) % nPointCount) );

        return geometry::RealBezierSegment2D( rPt.getX(),
                                              rPt.getY(),
                                              rCtrl0.getX(),
                                              rCtrl0.getY(),
                                              rCtrl1.getX(),
                                              rCtrl1.getY() );
    }

    void SAL_CALL UnoPolyPolygon::setBezierSegment( const geometry::RealBezierSegment2D& segment, 
                                                         sal_Int32 						 nPolygonIndex, 
                                                         sal_Int32						 nPointIndex ) throw (lang::IndexOutOfBoundsException, 
                                                                                                              uno::RuntimeException)
    {
        osl::MutexGuard const guard( m_aMutex );        
        checkIndex( nPolygonIndex );
        modifying();

        B2DPolygon aPoly( maPolyPoly.getB2DPolygon( nPolygonIndex ) );
		const sal_uInt32 nPointCount(aPoly.count());

        if( nPointIndex < 0 || nPointIndex >= static_cast<sal_Int32>(nPointCount) )
            throw lang::IndexOutOfBoundsException();

        aPoly.setB2DPoint( nPointIndex,
                           B2DPoint( segment.Px,
                                     segment.Py ) );
        aPoly.setNextControlPoint(nPointIndex, 
                                  B2DPoint(segment.C1x, segment.C1y));
        aPoly.setPrevControlPoint((nPointIndex + 1) % nPointCount, 
                                  B2DPoint(segment.C2x, segment.C2y));

        maPolyPoly.setB2DPolygon( nPolygonIndex, aPoly );
    }

    B2DPolyPolygon UnoPolyPolygon::getSubsetPolyPolygon(
        sal_Int32 nPolygonIndex, 
        sal_Int32 nNumberOfPolygons, 
        sal_Int32 nPointIndex, 
        sal_Int32 nNumberOfPoints ) const
    {
        osl::MutexGuard const guard( m_aMutex );        
        checkIndex( nPolygonIndex );

        const sal_Int32 nPolyCount( maPolyPoly.count() );

        // check for "full polygon" case
        if( !nPolygonIndex && 
            !nPointIndex &&
            nNumberOfPolygons == nPolyCount &&
            nNumberOfPoints == -1 )
        {
            return maPolyPoly;
        }

        B2DPolyPolygon aSubsetPoly;

        // create temporary polygon (as an extract from maPoly,
        // which contains the requested subset)
        for( sal_Int32 i=nPolygonIndex; i<nNumberOfPolygons; ++i )
        {
            checkIndex(i);

            const B2DPolygon& rCurrPoly( maPolyPoly.getB2DPolygon(i) );

            sal_Int32 nFirstPoint(0);
            sal_Int32 nLastPoint(nPolyCount-1);

            if( nPointIndex && i==nPolygonIndex )
            {
                // very first polygon - respect nPointIndex, if
                // not zero

                // empty polygon - impossible to specify _any_
                // legal value except 0 here!
                if( !nPolyCount && nPointIndex )
                    throw lang::IndexOutOfBoundsException();

                nFirstPoint = nPointIndex;
            }
                
            if( i==nNumberOfPolygons-1 && nNumberOfPoints != -1 )
            {
                // very last polygon - respect nNumberOfPoints

                // empty polygon - impossible to specify _any_
                // legal value except -1 here!
                if( !nPolyCount )
                    throw lang::IndexOutOfBoundsException();

                nLastPoint = nFirstPoint+nNumberOfPoints;
            }

            if( !nPolyCount )
            {
                // empty polygon - index checks already performed
                // above, now simply append empty polygon
                aSubsetPoly.append( rCurrPoly );
            }
            else
            {
                if( nFirstPoint < 0 || nFirstPoint >= nPolyCount )
                    throw lang::IndexOutOfBoundsException();

                if( nLastPoint < 0 || nLastPoint >= nPolyCount )
                    throw lang::IndexOutOfBoundsException();

                B2DPolygon aTmp;
                for( sal_Int32 j=nFirstPoint; j<nLastPoint; ++j )
                    aTmp.append( rCurrPoly.getB2DPoint(j) );

                aSubsetPoly.append( aTmp );
            }
        }
            
        return aSubsetPoly;
    }

    B2DPolyPolygon UnoPolyPolygon::getPolyPolygonUnsafe() const
    {
        return maPolyPoly;
    }

#define IMPLEMENTATION_NAME "gfx::internal::UnoPolyPolygon"
#define SERVICE_NAME "com.sun.star.rendering.PolyPolygon2D"
    ::rtl::OUString SAL_CALL UnoPolyPolygon::getImplementationName() throw( uno::RuntimeException )
    {
        return ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( IMPLEMENTATION_NAME ) );
    }

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

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

    B2DPolyPolygon UnoPolyPolygon::getPolyPolygon() const
    {
        osl::MutexGuard const guard( m_aMutex );

        // detach result from us
        B2DPolyPolygon aRet( maPolyPoly );
        aRet.makeUnique();
        return aRet;
    }

}
}