RectangleIntersection.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2014 Mika Heiskanen <mika.heiskanen@fmi.fi>
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************/

#ifndef GEOS_OP_RECTANGLE_INTERSECTION_H
#define GEOS_OP_RECTANGLE_INTERSECTION_H

#include <geos/export.h>

#include <memory>

#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif

// Forward declarations
namespace geos {
namespace geom {
class Point;
class MultiPoint;
class Polygon;
class MultiPolygon;
class LineString;
class MultiLineString;
class Geometry;
class GeometryCollection;
class GeometryFactory;
class CoordinateSequenceFactory;
}
namespace operation {
namespace intersection {
class Rectangle;
class RectangleIntersectionBuilder;
}
}
}

namespace geos {
namespace operation { // geos::operation
namespace intersection { // geos::operation::intersection

class GEOS_DLL RectangleIntersection {
public:

    static std::unique_ptr<geom::Geometry> clip(const geom::Geometry& geom,
            const Rectangle& rect);

    static std::unique_ptr<geom::Geometry> clipBoundary(const geom::Geometry& geom,
            const Rectangle& rect);

private:

    RectangleIntersection(const geom::Geometry& geom, const Rectangle& rect);

    std::unique_ptr<geom::Geometry> clipBoundary();

    std::unique_ptr<geom::Geometry> clip();

    const geom::Geometry& _geom;
    const Rectangle& _rect;
    const geom::GeometryFactory* _gf;
    const geom::CoordinateSequenceFactory* _csf;

    void clip_geom(const geom::Geometry* g,
                   RectangleIntersectionBuilder& parts,
                   const Rectangle& rect,
                   bool keep_polygons);

    void clip_point(const geom::Point* g,
                    RectangleIntersectionBuilder& parts,
                    const Rectangle& rect);

    void clip_multipoint(const geom::MultiPoint* g,
                         RectangleIntersectionBuilder& parts,
                         const Rectangle& rect);

    void clip_linestring(const geom::LineString* g,
                         RectangleIntersectionBuilder& parts,
                         const Rectangle& rect);

    void clip_multilinestring(const geom::MultiLineString* g,
                              RectangleIntersectionBuilder& parts,
                              const Rectangle& rect);

    void clip_polygon(const geom::Polygon* g,
                      RectangleIntersectionBuilder& parts,
                      const Rectangle& rect,
                      bool keep_polygons);

    void clip_multipolygon(const geom::MultiPolygon* g,
                           RectangleIntersectionBuilder& parts,
                           const Rectangle& rect,
                           bool keep_polygons);

    void clip_geometrycollection(
        const geom::GeometryCollection* g,
        RectangleIntersectionBuilder& parts,
        const Rectangle& rect,
        bool keep_polygons);

    void clip_polygon_to_linestrings(const geom::Polygon* g,
                                     RectangleIntersectionBuilder& parts,
                                     const Rectangle& rect);

    void clip_polygon_to_polygons(const geom::Polygon* g,
                                  RectangleIntersectionBuilder& parts,
                                  const Rectangle& rect);


    bool clip_linestring_parts(const geom::LineString* gi,
                               RectangleIntersectionBuilder& parts,
                               const Rectangle& rect);

}; // class RectangleIntersection

} // namespace geos::operation::intersection
} // namespace geos::operation
} // namespace geos

#endif // GEOS_OP_RECTANGLE_INTERSECTION_H