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#include <mbgl/style/sources/geojson_source_impl.hpp>
#include <mbgl/util/constants.hpp>
#include <mbgl/tile/tile_id.hpp>
#include <mbgl/util/string.hpp>
#include <mapbox/geojsonvt.hpp>
#include <supercluster.hpp>
#include <cmath>
namespace mbgl {
namespace style {
class GeoJSONVTData : public GeoJSONData {
public:
GeoJSONVTData(const GeoJSON& geoJSON,
const mapbox::geojsonvt::Options& options)
: impl(geoJSON, options) {}
mapbox::geometry::feature_collection<int16_t> getTile(const CanonicalTileID& tileID) final {
return impl.getTile(tileID.z, tileID.x, tileID.y).features;
}
private:
mapbox::geojsonvt::GeoJSONVT impl;
};
class SuperclusterData : public GeoJSONData {
public:
SuperclusterData(const mapbox::geometry::feature_collection<double>& features,
const mapbox::supercluster::Options& options)
: impl(features, options) {}
mapbox::geometry::feature_collection<int16_t> getTile(const CanonicalTileID& tileID) final {
return impl.getTile(tileID.z, tileID.x, tileID.y);
}
private:
mapbox::supercluster::Supercluster impl;
};
GeoJSONSource::Impl::Impl(std::string id_, GeoJSONOptions options_)
: Source::Impl(SourceType::GeoJSON, std::move(id_)),
options(std::move(options_)) {
}
GeoJSONSource::Impl::Impl(const Impl& other, const GeoJSON& geoJSON)
: Source::Impl(other),
options(other.options) {
double scale = util::EXTENT / util::tileSize;
if (options.cluster
&& geoJSON.is<mapbox::geometry::feature_collection<double>>()
&& !geoJSON.get<mapbox::geometry::feature_collection<double>>().empty()) {
mapbox::supercluster::Options clusterOptions;
clusterOptions.maxZoom = options.clusterMaxZoom;
clusterOptions.extent = util::EXTENT;
clusterOptions.radius = ::round(scale * options.clusterRadius);
data = std::make_unique<SuperclusterData>(
geoJSON.get<mapbox::geometry::feature_collection<double>>(), clusterOptions);
} else {
mapbox::geojsonvt::Options vtOptions;
vtOptions.maxZoom = options.maxzoom;
vtOptions.extent = util::EXTENT;
vtOptions.buffer = ::round(scale * options.buffer);
vtOptions.tolerance = scale * options.tolerance;
data = std::make_unique<GeoJSONVTData>(geoJSON, vtOptions);
}
}
GeoJSONSource::Impl::~Impl() = default;
Range<uint8_t> GeoJSONSource::Impl::getZoomRange() const {
return { 0, options.maxzoom };
}
GeoJSONData* GeoJSONSource::Impl::getData() const {
return data.get();
}
optional<std::string> GeoJSONSource::Impl::getAttribution() const {
return {};
}
} // namespace style
} // namespace mbgl
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