From 3f0c89d633a5056006557ad5f4b9e446807d00ee Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Thu, 20 Apr 2017 17:11:50 -0700
Subject: [core] Refactor Source::*Impls into RenderSources and TilePyramid

---
 src/mbgl/style/sources/geojson_source_impl.cpp | 89 +++++++++++++-------------
 1 file changed, 45 insertions(+), 44 deletions(-)

(limited to 'src/mbgl/style/sources/geojson_source_impl.cpp')

diff --git a/src/mbgl/style/sources/geojson_source_impl.cpp b/src/mbgl/style/sources/geojson_source_impl.cpp
index 6431d5faa4..08ed95ea3f 100644
--- a/src/mbgl/style/sources/geojson_source_impl.cpp
+++ b/src/mbgl/style/sources/geojson_source_impl.cpp
@@ -1,10 +1,12 @@
-#include <mbgl/util/logging.hpp>
-#include <mbgl/storage/file_source.hpp>
+#include <mbgl/style/sources/geojson_source_impl.hpp>
 #include <mbgl/style/conversion/geojson.hpp>
 #include <mbgl/style/source_observer.hpp>
-#include <mbgl/style/sources/geojson_source_impl.hpp>
-#include <mbgl/tile/geojson_tile.hpp>
+#include <mbgl/tile/tile_id.hpp>
+#include <mbgl/storage/file_source.hpp>
+#include <mbgl/renderer/sources/render_geojson_source.hpp>
 #include <mbgl/util/rapidjson.hpp>
+#include <mbgl/util/constants.cpp>
+#include <mbgl/util/logging.hpp>
 
 #include <mapbox/geojson.hpp>
 #include <mapbox/geojson/rapidjson.hpp>
@@ -31,6 +33,34 @@ optional<GeoJSON> convertGeoJSON(const JSValue& value, Error& error) {
 }
 } // namespace conversion
 
+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_, Source& base_, const GeoJSONOptions options_)
     : Source::Impl(SourceType::GeoJSON, std::move(id_), base_), options(options_) {
 }
@@ -52,18 +82,14 @@ optional<std::string> GeoJSONSource::Impl::getURL() const {
     return url;
 }
 
-
 void GeoJSONSource::Impl::setGeoJSON(const GeoJSON& geoJSON) {
     req.reset();
     _setGeoJSON(geoJSON);
 }
 
-// Private implementation
 void GeoJSONSource::Impl::_setGeoJSON(const GeoJSON& geoJSON) {
     double scale = util::EXTENT / util::tileSize;
 
-    cache.clear();
-
     if (options.cluster
         && geoJSON.is<mapbox::geometry::feature_collection<double>>()
         && !geoJSON.get<mapbox::geometry::feature_collection<double>>().empty()) {
@@ -71,35 +97,15 @@ void GeoJSONSource::Impl::_setGeoJSON(const GeoJSON& geoJSON) {
         clusterOptions.maxZoom = options.clusterMaxZoom;
         clusterOptions.extent = util::EXTENT;
         clusterOptions.radius = std::round(scale * options.clusterRadius);
-
-        const auto& features = geoJSON.get<mapbox::geometry::feature_collection<double>>();
-        geoJSONOrSupercluster =
-            std::make_unique<mapbox::supercluster::Supercluster>(features, clusterOptions);
+        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 = std::round(scale * options.buffer);
         vtOptions.tolerance = scale * options.tolerance;
-        geoJSONOrSupercluster = std::make_unique<mapbox::geojsonvt::GeoJSONVT>(geoJSON, vtOptions);
-    }
-
-    for (auto const &item : tiles) {
-        GeoJSONTile* geoJSONTile = static_cast<GeoJSONTile*>(item.second.get());
-        setTileData(*geoJSONTile, geoJSONTile->id);
-    }
-}
-
-void GeoJSONSource::Impl::setTileData(GeoJSONTile& tile, const OverscaledTileID& tileID) {
-    if (geoJSONOrSupercluster.is<GeoJSONVTPointer>()) {
-        tile.updateData(geoJSONOrSupercluster.get<GeoJSONVTPointer>()->getTile(tileID.canonical.z,
-                                                                               tileID.canonical.x,
-                                                                               tileID.canonical.y).features);
-    } else {
-        assert(geoJSONOrSupercluster.is<SuperclusterPointer>());
-        tile.updateData(geoJSONOrSupercluster.get<SuperclusterPointer>()->getTile(tileID.canonical.z,
-                                                                                  tileID.canonical.x,
-                                                                                  tileID.canonical.y));
+        data = std::make_unique<GeoJSONVTData>(geoJSON, vtOptions);
     }
 }
 
@@ -135,8 +141,6 @@ void GeoJSONSource::Impl::loadDescription(FileSource& fileSource) {
                 return;
             }
 
-            invalidateTiles();
-
             conversion::Error error;
             optional<GeoJSON> geoJSON = conversion::convertGeoJSON<JSValue>(d, error);
             if (!geoJSON) {
@@ -155,19 +159,16 @@ void GeoJSONSource::Impl::loadDescription(FileSource& fileSource) {
     });
 }
 
-optional<Range<uint8_t>> GeoJSONSource::Impl::getZoomRange() const {
-    if (loaded) {
-        return { { 0, options.maxzoom }};
-    }
-    return {};
+std::unique_ptr<RenderSource> GeoJSONSource::Impl::createRenderSource() const {
+    return std::make_unique<RenderGeoJSONSource>(*this);
+}
+
+Range<uint8_t> GeoJSONSource::Impl::getZoomRange() const {
+    return { 0, options.maxzoom };
 }
 
-std::unique_ptr<Tile> GeoJSONSource::Impl::createTile(const OverscaledTileID& tileID,
-                                                      const UpdateParameters& parameters) {
-    assert(loaded);
-    auto tilePointer = std::make_unique<GeoJSONTile>(tileID, base.getID(), parameters);
-    setTileData(*tilePointer.get(), tileID);
-    return std::move(tilePointer);
+GeoJSONData* GeoJSONSource::Impl::getData() const {
+    return data.get();
 }
 
 } // namespace style
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