GeoJSON point clustering (#5724)

* add supercluster dependency
* prepare GeoJSONTile for Supercluster
* prepare GeoJSONSource for accepting options
* try removing mbgl::GeoJSON
* fix setGeoJSON types
* add GeoJSONSource getURL
* add geojson to include path
* add Supercluster index in GeoJSONSource
* fix GeoJSONSource getZoomRange
* bring back mbgl::GeoJSON header
* fix tidy warnings hopefully
* try test-suite with enabled cluster test
* fix formatting in clustering-related files

1 files changed, 33 insertions, 2 deletions

diff --git a/include/mbgl/style/sources/geojson_source.hpp b/include/mbgl/style/sources/geojson_source.hpp
index 3736dd44bc..37ddce1bcc 100644
--- a/include/mbgl/style/sources/geojson_source.hpp
+++ b/include/mbgl/style/sources/geojson_source.hpp
@@ -3,15 +3,46 @@
 #include <mbgl/style/source.hpp>
 #include <mbgl/util/geojson.hpp>
 
+#include <mapbox/geojson.hpp>
+
+namespace mapbox {
+
+namespace geojsonvt {
+class GeoJSONVT;
+} // namespace geojsonvt
+
+namespace supercluster {
+class Supercluster;
+} // namespace supercluster
+
+} // namespace mapbox
+
 namespace mbgl {
 namespace style {
 
+using GeoJSONVTPointer = std::unique_ptr<mapbox::geojsonvt::GeoJSONVT>;
+using SuperclusterPointer = std::unique_ptr<mapbox::supercluster::Supercluster>;
+
+struct GeoJSONOptions {
+    // GeoJSON-VT options
+    uint8_t maxzoom = 18;
+    uint16_t buffer = 128;
+    double tolerance = 0.375;
+
+    // Supercluster options
+    bool cluster = false;
+    uint16_t clusterRadius = 50;
+    uint8_t clusterMaxZoom = 17;
+};
+
 class GeoJSONSource : public Source {
 public:
-    GeoJSONSource(const std::string& id);
+    GeoJSONSource(const std::string& id, const GeoJSONOptions options_ = GeoJSONOptions());
 
     void setURL(const std::string& url);
-    void setGeoJSON(GeoJSON&&);
+    void setGeoJSON(const GeoJSON&);
+
+    std::string getURL();
 
     // Private implementation