/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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 *   ownership. The ASF licenses this file to you under the Apache
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 *   except in compliance with the License. You may obtain a copy of
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#include <drawinglayer/primitive2d/fillhatchprimitive2d.hxx>
#include <texture/texture.hxx>
#include <drawinglayer/primitive2d/PolygonHairlinePrimitive2D.hxx>
#include <drawinglayer/primitive2d/PolyPolygonColorPrimitive2D.hxx>
#include <drawinglayer/primitive2d/groupprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
#include <utility>


using namespace com::sun::star;


namespace drawinglayer::primitive2d
{
        Primitive2DReference FillHatchPrimitive2D::create2DDecomposition(const geometry::ViewInformation2D& /*rViewInformation*/) const
        {
            if(getFillHatch().isDefault())
                return nullptr;

            // create hatch
            const basegfx::BColor aHatchColor(getFillHatch().getColor());
            const double fAngle(getFillHatch().getAngle());
            std::vector< basegfx::B2DHomMatrix > aMatrices;
            double fDistance(getFillHatch().getDistance());
            const bool bAdaptDistance(0 != getFillHatch().getMinimalDiscreteDistance());

            // #i120230# evtl. adapt distance
            if(bAdaptDistance)
            {
                const double fDiscreteDistance(getFillHatch().getDistance() / getDiscreteUnit());

                if(fDiscreteDistance < static_cast<double>(getFillHatch().getMinimalDiscreteDistance()))
                {
                    fDistance = static_cast<double>(getFillHatch().getMinimalDiscreteDistance()) * getDiscreteUnit();
                }
            }

            // get hatch transformations
            switch(getFillHatch().getStyle())
            {
                case attribute::HatchStyle::Triple:
                {
                    // rotated 45 degrees
                    texture::GeoTexSvxHatch aHatch(
                        getDefinitionRange(),
                        getOutputRange(),
                        fDistance,
                        fAngle - M_PI_4);

                    aHatch.appendTransformations(aMatrices);

                    [[fallthrough]];
                }
                case attribute::HatchStyle::Double:
                {
                    // rotated 90 degrees
                    texture::GeoTexSvxHatch aHatch(
                        getDefinitionRange(),
                        getOutputRange(),
                        fDistance,
                        fAngle - M_PI_2);

                    aHatch.appendTransformations(aMatrices);

                    [[fallthrough]];
                }
                case attribute::HatchStyle::Single:
                {
                    // angle as given
                    texture::GeoTexSvxHatch aHatch(
                        getDefinitionRange(),
                        getOutputRange(),
                        fDistance,
                        fAngle);

                    aHatch.appendTransformations(aMatrices);
                }
            }

            // prepare return value
            const bool bFillBackground(getFillHatch().isFillBackground());
            Primitive2DContainer aContainer;
            // evtl. create filled background
            if(bFillBackground)
            {
                // create primitive for background
                aContainer.push_back(
                    new PolyPolygonColorPrimitive2D(
                        basegfx::B2DPolyPolygon(
                            basegfx::utils::createPolygonFromRect(getOutputRange())), getBColor()));
            }

            // create primitives
            const basegfx::B2DPoint aStart(0.0, 0.0);
            const basegfx::B2DPoint aEnd(1.0, 0.0);

            for (const auto &a : aMatrices)
            {
                const basegfx::B2DHomMatrix& rMatrix = a;
                basegfx::B2DPolygon aNewLine;

                aNewLine.append(rMatrix * aStart);
                aNewLine.append(rMatrix * aEnd);

                // create hairline
                aContainer.push_back(new PolygonHairlinePrimitive2D(std::move(aNewLine), aHatchColor));
            }
            return new GroupPrimitive2D(std::move(aContainer));
        }

        FillHatchPrimitive2D::FillHatchPrimitive2D(
            const basegfx::B2DRange& rOutputRange,
            const basegfx::BColor& rBColor,
            attribute::FillHatchAttribute aFillHatch)
        :   maOutputRange(rOutputRange),
            maDefinitionRange(rOutputRange),
            maFillHatch(std::move(aFillHatch)),
            maBColor(rBColor)
        {
        }

        FillHatchPrimitive2D::FillHatchPrimitive2D(
            const basegfx::B2DRange& rOutputRange,
            const basegfx::B2DRange& rDefinitionRange,
            const basegfx::BColor& rBColor,
            attribute::FillHatchAttribute aFillHatch)
        :   maOutputRange(rOutputRange),
            maDefinitionRange(rDefinitionRange),
            maFillHatch(std::move(aFillHatch)),
            maBColor(rBColor)
        {
        }

        bool FillHatchPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
        {
            if(DiscreteMetricDependentPrimitive2D::operator==(rPrimitive))
            {
                const FillHatchPrimitive2D& rCompare = static_cast<const FillHatchPrimitive2D&>(rPrimitive);

                return (getOutputRange() == rCompare.getOutputRange()
                    && getDefinitionRange() == rCompare.getDefinitionRange()
                    && getFillHatch() == rCompare.getFillHatch()
                    && getBColor() == rCompare.getBColor());
            }

            return false;
        }

        basegfx::B2DRange FillHatchPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation*/) const
        {
            // return the geometrically visible area
            return getOutputRange();
        }

        void FillHatchPrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
        {
            bool bAdaptDistance(0 != getFillHatch().getMinimalDiscreteDistance());

            if(bAdaptDistance)
            {
                // behave view-dependent
                DiscreteMetricDependentPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
            }
            else
            {
                // behave view-independent
                BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
            }
        }

        // provide unique ID
        sal_uInt32 FillHatchPrimitive2D::getPrimitive2DID() const
        {
            return PRIMITIVE2D_ID_FILLHATCHPRIMITIVE2D;
        }

} // end of namespace

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