110 lines
3.8 KiB
C++
110 lines
3.8 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2017 Artem Pavlenko
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#ifndef GEOJSON_DATASOURCE_HPP
|
|
#define GEOJSON_DATASOURCE_HPP
|
|
|
|
// mapnik
|
|
#include <mapnik/datasource.hpp>
|
|
#include <mapnik/params.hpp>
|
|
#include <mapnik/query.hpp>
|
|
#include <mapnik/feature.hpp>
|
|
#include <mapnik/geometry/box2d.hpp>
|
|
#include <mapnik/coord.hpp>
|
|
#include <mapnik/feature_layer_desc.hpp>
|
|
#include <mapnik/unicode.hpp>
|
|
|
|
#include <mapnik/warning.hpp>
|
|
MAPNIK_DISABLE_WARNING_PUSH
|
|
#include <mapnik/warning_ignore.hpp>
|
|
#include <boost/optional.hpp>
|
|
#include <boost/version.hpp>
|
|
#include <boost/geometry/index/rtree.hpp>
|
|
MAPNIK_DISABLE_WARNING_POP
|
|
|
|
// stl
|
|
#include <memory>
|
|
#include <vector>
|
|
#include <string>
|
|
#include <map>
|
|
#include <deque>
|
|
#include <functional>
|
|
|
|
template <std::size_t Max, std::size_t Min>
|
|
struct geojson_linear : boost::geometry::index::linear<Max,Min> {};
|
|
|
|
namespace boost { namespace geometry { namespace index { namespace detail { namespace rtree {
|
|
|
|
template <std::size_t Max, std::size_t Min>
|
|
struct options_type<geojson_linear<Max,Min> >
|
|
{
|
|
using type = options<geojson_linear<Max, Min>,
|
|
insert_default_tag,
|
|
choose_by_content_diff_tag,
|
|
split_default_tag,
|
|
linear_tag,
|
|
#if BOOST_VERSION >= 105700
|
|
node_variant_static_tag>;
|
|
#else
|
|
node_s_mem_static_tag>;
|
|
|
|
#endif
|
|
};
|
|
|
|
}}}}}
|
|
|
|
class geojson_datasource : public mapnik::datasource
|
|
{
|
|
public:
|
|
using box_type = mapnik::box2d<double>;
|
|
using item_type = std::pair<box_type, std::pair<std::uint64_t, std::uint64_t> >;
|
|
using spatial_index_type = boost::geometry::index::rtree<item_type,geojson_linear<16,4> >;
|
|
// constructor
|
|
geojson_datasource(mapnik::parameters const& params);
|
|
virtual ~geojson_datasource ();
|
|
mapnik::datasource::datasource_t type() const;
|
|
static const char * name();
|
|
mapnik::featureset_ptr features(mapnik::query const& q) const;
|
|
mapnik::featureset_ptr features_at_point(mapnik::coord2d const& pt, double tol = 0) const;
|
|
mapnik::box2d<double> envelope() const;
|
|
mapnik::layer_descriptor get_descriptor() const;
|
|
boost::optional<mapnik::datasource_geometry_t> get_geometry_type() const;
|
|
template <typename Iterator>
|
|
void parse_geojson(Iterator start, Iterator end);
|
|
template <typename Iterator>
|
|
void initialise_index(Iterator start, Iterator end);
|
|
void initialise_disk_index(std::string const& filename);
|
|
private:
|
|
void initialise_descriptor(mapnik::feature_ptr const&);
|
|
mapnik::datasource::datasource_t type_;
|
|
mapnik::layer_descriptor desc_;
|
|
std::string filename_;
|
|
bool from_inline_string_;
|
|
mapnik::box2d<double> extent_;
|
|
std::vector<mapnik::feature_ptr> features_;
|
|
std::unique_ptr<spatial_index_type> tree_;
|
|
bool cache_features_ = true;
|
|
bool has_disk_index_ = false;
|
|
const std::size_t num_features_to_query_;
|
|
};
|
|
|
|
#endif // GEOJSON_DATASOURCE_HPP
|