83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
#pragma once
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#include <mbgl/tile/geometry_tile_data.hpp>
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namespace mbgl {
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// Implements a simple in-memory Tile type that holds GeoJSON values. A GeoJSON
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// tile can only have one layer, and it is always returned regardless of which
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// layer is requested.
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class GeoJSONTileFeature : public GeometryTileFeature {
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public:
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const mapbox::feature::feature<int16_t>& feature;
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GeoJSONTileFeature(const mapbox::feature::feature<int16_t>& feature_)
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: feature(feature_) {}
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FeatureType getType() const override { return apply_visitor(ToFeatureType(), feature.geometry); }
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const PropertyMap& getProperties() const override { return feature.properties; }
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FeatureIdentifier getID() const override { return feature.id; }
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const GeometryCollection& getGeometries() const override {
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if (!geometry) {
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geometry = apply_visitor(ToGeometryCollection(), feature.geometry);
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// https://github.com/mapbox/geojson-vt-cpp/issues/44
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if (getType() == FeatureType::Polygon) {
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geometry = fixupPolygons(*geometry);
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}
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}
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return *geometry;
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}
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std::optional<Value> getValue(const std::string& key) const override {
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auto it = feature.properties.find(key);
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if (it != feature.properties.end()) {
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return std::optional<Value>(it->second);
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}
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return std::optional<Value>();
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}
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mutable std::optional<GeometryCollection> geometry;
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};
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class GeoJSONTileLayer : public GeometryTileLayer {
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public:
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GeoJSONTileLayer(std::shared_ptr<const mapbox::feature::feature_collection<int16_t>> features_)
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: features(std::move(features_)) {}
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std::size_t featureCount() const override { return features->size(); }
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std::unique_ptr<GeometryTileFeature> getFeature(std::size_t i) const override {
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return std::make_unique<GeoJSONTileFeature>((*features)[i]);
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}
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std::string getName() const override { return ""; }
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private:
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std::shared_ptr<const mapbox::feature::feature_collection<int16_t>> features;
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};
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class GeoJSONTileData : public GeometryTileData {
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public:
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GeoJSONTileData(mapbox::feature::feature_collection<int16_t> features_)
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: features(std::make_shared<mapbox::feature::feature_collection<int16_t>>(std::move(features_))) {}
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GeoJSONTileData(std::shared_ptr<const mapbox::feature::feature_collection<int16_t>> features_)
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: features(std::move(features_)) {}
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std::unique_ptr<GeometryTileData> clone() const override { return std::make_unique<GeoJSONTileData>(features); }
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std::unique_ptr<GeometryTileLayer> getLayer(const std::string&) const override {
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return std::make_unique<GeoJSONTileLayer>(features);
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}
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private:
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std::shared_ptr<const mapbox::feature::feature_collection<int16_t>> features;
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};
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} // namespace mbgl
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