b2dpolygon.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#pragma once
 
#include <memory>
#include <ostream>
#include <vector>
 
#include <sal/types.h>
#include <o3tl/cow_wrapper.hxx>
#include <basegfx/vector/b2enums.hxx>
#include <basegfx/basegfxdllapi.h>
 
class ImplB2DPolygon;
 
namespace basegfx
{
    class B2DPoint;
    class B2DRange;
    class B2DHomMatrix;
    class B2DCubicBezier;
    class B2DVector;
    class SystemDependentData;
    class SystemDependentDataManager;
    typedef std::shared_ptr<SystemDependentData> SystemDependentData_SharedPtr;
}
 
namespace basegfx
{
    class SAL_WARN_UNUSED BASEGFX_DLLPUBLIC B2DPolygon
    {
    public:
        typedef o3tl::cow_wrapper< ImplB2DPolygon > ImplType;
 
    private:
        // internal data.
        ImplType                                    mpPolygon;
 
    public:
        B2DPolygon();
        B2DPolygon(const B2DPolygon& rPolygon);
        B2DPolygon(B2DPolygon&& rPolygon);
        B2DPolygon(const B2DPolygon& rPolygon, sal_uInt32 nIndex, sal_uInt32 nCount);
        B2DPolygon(std::initializer_list<basegfx::B2DPoint> rPoints);
 
        ~B2DPolygon();
 
        B2DPolygon& operator=(const B2DPolygon& rPolygon);
        B2DPolygon& operator=(B2DPolygon&& rPolygon);
 
        void makeUnique();
 
        bool operator==(const B2DPolygon& rPolygon) const;
        bool operator!=(const B2DPolygon& rPolygon) const;
 
        sal_uInt32 count() const;
 
        basegfx::B2DPoint const & getB2DPoint(sal_uInt32 nIndex) const;
        void setB2DPoint(sal_uInt32 nIndex, const basegfx::B2DPoint& rValue);
 
        void insert(sal_uInt32 nIndex, const basegfx::B2DPoint& rPoint, sal_uInt32 nCount = 1);
        void append(const basegfx::B2DPoint& rPoint, sal_uInt32 nCount);
        void append(const basegfx::B2DPoint& rPoint);
        void reserve(sal_uInt32 nCount);
 
        basegfx::B2DPoint getPrevControlPoint(sal_uInt32 nIndex) const;
        basegfx::B2DPoint getNextControlPoint(sal_uInt32 nIndex) const;
        void setPrevControlPoint(sal_uInt32 nIndex, const basegfx::B2DPoint& rValue);
        void setNextControlPoint(sal_uInt32 nIndex, const basegfx::B2DPoint& rValue);
        void setControlPoints(sal_uInt32 nIndex, const basegfx::B2DPoint& rPrev, const basegfx::B2DPoint& rNext);
 
        void resetPrevControlPoint(sal_uInt32 nIndex);
        void resetNextControlPoint(sal_uInt32 nIndex);
        void resetControlPoints();
 
        void appendBezierSegment(const basegfx::B2DPoint& rNextControlPoint,
                                 const basegfx::B2DPoint& rPrevControlPoint,
                                 const basegfx::B2DPoint& rPoint);
 
        void appendQuadraticBezierSegment(const basegfx::B2DPoint& rQuadControlPoint,
                                          const basegfx::B2DPoint& rPoint);
 
        bool areControlPointsUsed() const;
        bool isPrevControlPointUsed(sal_uInt32 nIndex) const;
        bool isNextControlPointUsed(sal_uInt32 nIndex) const;
        B2VectorContinuity getContinuityInPoint(sal_uInt32 nIndex) const;
 
        void getBezierSegment(sal_uInt32 nIndex, B2DCubicBezier& rTarget) const;
 
        B2DPolygon const & getDefaultAdaptiveSubdivision() const;
 
        B2DRange const & getB2DRange() const;
 
        void append(const B2DPolygon& rPoly, sal_uInt32 nIndex = 0, sal_uInt32 nCount = 0);
 
        void remove(sal_uInt32 nIndex, sal_uInt32 nCount = 1);
 
        void clear();
 
        bool isClosed() const;
        void setClosed(bool bNew);
 
        void flip();
 
        bool hasDoublePoints() const;
 
        void removeDoublePoints();
 
        void transform(const basegfx::B2DHomMatrix& rMatrix);
 
        // exclusive management op's for SystemDependentData at B2DPolygon
        template<class T>
        std::shared_ptr<T> getSystemDependentData() const
        {
            return std::static_pointer_cast<T>(getSystemDependantDataInternal(typeid(T).hash_code()));
        }
 
        template<class T, class... Args>
        std::shared_ptr<T> addOrReplaceSystemDependentData(Args&&... args) const
        {
            std::shared_ptr<T> r = std::make_shared<T>(std::forward<Args>(args)...);
 
            // tdf#129845 only add to buffer if a relevant buffer time is estimated
            if(r->calculateCombinedHoldCyclesInSeconds() > 0)
            {
                basegfx::SystemDependentData_SharedPtr r2(r);
                addOrReplaceSystemDependentDataInternal(r2);
            }
 
            return r;
        }
 
    private:
        void addOrReplaceSystemDependentDataInternal(SystemDependentData_SharedPtr& rData) const;
        SystemDependentData_SharedPtr getSystemDependantDataInternal(size_t hash_code) const;
        const basegfx::B2DVector& getPrevControlVector(sal_uInt32 nIndex) const;
        const basegfx::B2DVector& getNextControlVector(sal_uInt32 nIndex) const;
    };
 
    // typedef for a vector of B2DPolygons
    typedef ::std::vector< B2DPolygon > B2DPolygonVector;
 
    template< typename charT, typename traits >
    inline std::basic_ostream<charT, traits> & operator <<(
        std::basic_ostream<charT, traits> & stream, const B2DPolygon& poly )
    {
        stream << "<" << poly.count() << ":";
        for (sal_uInt32 i = 0; i < poly.count(); i++)
        {
            if (i > 0)
                stream << "--";
            stream << poly.getB2DPoint(i);
        }
        stream << ">";
 
        return stream;
    }
 
} // end of namespace basegfx
 
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