Quadtree.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * 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.
 *
 **********************************************************************
 *
 * Last port: index/quadtree/Quadtree.java rev. 1.16 (JTS-1.10)
 *
 **********************************************************************/

#ifndef GEOS_IDX_QUADTREE_QUADTREE_H
#define GEOS_IDX_QUADTREE_QUADTREE_H

#include <geos/export.h>
#include <geos/geom/Envelope.h>
#include <geos/index/SpatialIndex.h> // for inheritance
#include <geos/index/quadtree/Root.h> // for composition

#include <memory>
#include <vector>
#include <string>

#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 index {
namespace quadtree {
// class Root;
}
}
}

namespace geos {
namespace index { // geos::index
namespace quadtree { // geos::index::quadtree

class GEOS_DLL Quadtree: public SpatialIndex {

private:

    std::vector<std::unique_ptr<geom::Envelope>> newEnvelopes;

    void collectStats(const geom::Envelope& itemEnv);

    Root root;

    double minExtent;

public:
    static geom::Envelope* ensureExtent(const geom::Envelope* itemEnv,
                                        double minExtent);

    Quadtree()
        :
        root(),
        minExtent(1.0)
    {}

    ~Quadtree() override = default;

    int depth();

    size_t size();

    void insert(const geom::Envelope* itemEnv, void* item) override;

    void query(const geom::Envelope* searchEnv, std::vector<void*>& ret) override;


    void
    query(const geom::Envelope* searchEnv, ItemVisitor& visitor) override
    {
        /*
         * the items that are matched are the items in quads which
         * overlap the search envelope
         */
        root.visit(searchEnv, visitor);
    }

    bool remove(const geom::Envelope* itemEnv, void* item) override;

    std::vector<void*>* queryAll();

    std::string toString() const;

    Quadtree(const Quadtree&) = delete;
    Quadtree& operator=(const Quadtree&) = delete;

};

} // namespace geos::index::quadtree
} // namespace geos::index
} // namespace geos

#ifdef _MSC_VER
#pragma warning(pop)
#endif

#endif // GEOS_IDX_QUADTREE_QUADTREE_H