/* -*- 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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 */

#pragma once

#include <drawinglayer/drawinglayerdllapi.h>

#include <drawinglayer/primitive2d/BufferedDecompositionPrimitive2D.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>


namespace drawinglayer::primitive2d
{
        /** DiscreteMetricDependentPrimitive2D class

            tooling class for BufferedDecompositionPrimitive2D based classes which are view-dependent
            regarding the size of a discrete unit. The implementation of get2DDecomposition
            guards the buffered local decomposition and ensures that a create2DDecomposition
            implementation may use an up-to-date DiscreteUnit accessible using getDiscreteUnit()
         */
        class DRAWINGLAYER_DLLPUBLIC DiscreteMetricDependentPrimitive2D : public BufferedDecompositionPrimitive2D
        {
        private:
            /** the last used fDiscreteUnit definitions for decomposition. Since this
                is checked and updated from get2DDecomposition() it will be current and
                usable in create2DDecomposition()
             */
            double                                  mfDiscreteUnit;

        public:
            /// constructor
            DiscreteMetricDependentPrimitive2D()
            :   mfDiscreteUnit(0.0)
            {
            }

            /// data read access
            double getDiscreteUnit() const { return mfDiscreteUnit; }

            /// Override standard getDecomposition to be view-dependent here
            virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const override;
        };

        /** ViewportDependentPrimitive2D class

            tooling class for BufferedDecompositionPrimitive2D based classes which are view-dependent
            regarding the viewport. The implementation of get2DDecomposition
            guards the buffered local decomposition and ensures that a create2DDecomposition
            implementation may use an up-to-date Viewport accessible using getViewport()
         */
        class DRAWINGLAYER_DLLPUBLIC ViewportDependentPrimitive2D : public BufferedDecompositionPrimitive2D
        {
        private:
            /** the last used Viewport definition for decomposition. Since this
                is checked and updated from get2DDecomposition() it will be current and
                usable in create2DDecomposition()
             */
            basegfx::B2DRange                       maViewport;

        public:
            /// constructor
            ViewportDependentPrimitive2D()
            {
            }

            /// data read access
            const basegfx::B2DRange& getViewport() const { return maViewport; }

            /// Override standard getDecomposition to be view-dependent here
            virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const override;
        };

        /** ViewTransformationDependentPrimitive2D class

            tooling class for BufferedDecompositionPrimitive2D based classes which are view-dependent
            regarding the complete Viewtransformation. The implementation of get2DDecomposition
            guards the buffered local decomposition and ensures that a create2DDecomposition
            implementation may use an up-to-date ViewTransformation accessible using getViewTransformation()
         */
        class DRAWINGLAYER_DLLPUBLIC ViewTransformationDependentPrimitive2D : public BufferedDecompositionPrimitive2D
        {
        private:
            /** the last used ViewTransformation definition for decomposition. Since this
                is checked and updated from get2DDecomposition() it will be current and
                usable in create2DDecomposition()
             */
            basegfx::B2DHomMatrix                   maViewTransformation;

        public:
            /// constructor
            ViewTransformationDependentPrimitive2D()
            {
            }

            /// data read access
            const basegfx::B2DHomMatrix& getViewTransformation() const { return maViewTransformation; }

            /// Override standard getDecomposition to be view-dependent here
            virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const override;
        };

        /** ObjectAndViewTransformationDependentPrimitive2D class

            tooling class for BufferedDecompositionPrimitive2D based classes which are view-dependent
            and Object-Transform dependent. The implementation of get2DDecomposition
            guards the buffered local decomposition and ensures that a create2DDecomposition
            implementation may use an up-to-date ViewTransformation accessible using getViewTransformation()
            and an object transformation via getObjectTransformation()
         */
        class DRAWINGLAYER_DLLPUBLIC ObjectAndViewTransformationDependentPrimitive2D : public BufferedDecompositionPrimitive2D
        {
        private:
            /** the last used ViewTransformation and the last ObjectTransformation
                definition for decomposition. Since this is checked and updated from
                get2DDecomposition() it will be current and usable in create2DDecomposition()
             */
            basegfx::B2DHomMatrix                   maViewTransformation;
            basegfx::B2DHomMatrix                   maObjectTransformation;

        public:
            /// constructor
            ObjectAndViewTransformationDependentPrimitive2D()
            {
            }

            /// data read access
            const basegfx::B2DHomMatrix& getViewTransformation() const { return maViewTransformation; }
            const basegfx::B2DHomMatrix& getObjectTransformation() const { return maObjectTransformation; }

            /// Override standard getDecomposition to be view-dependent here
            virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const override;
        };
} // end of namespace drawinglayer::primitive2d

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