1 files changed, 85 insertions, 0 deletions
diff --git a/src/mbgl/tile/geometry_tile.hpp b/src/mbgl/tile/geometry_tile.hpp
new file mode 100644
index 0000000000..5cb2f96fdc
--- /dev/null
+++ b/src/mbgl/tile/geometry_tile.hpp
@@ -0,0 +1,85 @@
+#ifndef MBGL_MAP_GEOMETRY_TILE
+#define MBGL_MAP_GEOMETRY_TILE
+
+#include <mapbox/variant.hpp>
+
+#include <mbgl/style/value.hpp>
+#include <mbgl/util/chrono.hpp>
+#include <mbgl/util/ptr.hpp>
+#include <mbgl/util/vec.hpp>
+#include <mbgl/util/noncopyable.hpp>
+#include <mbgl/util/optional.hpp>
+
+#include <cstdint>
+#include <string>
+#include <vector>
+#include <functional>
+
+namespace mbgl {
+
+enum class FeatureType : uint8_t {
+    Unknown = 0,
+    Point = 1,
+    LineString = 2,
+    Polygon = 3
+};
+
+typedef std::vector<std::vector<Coordinate>> GeometryCollection;
+
+class GeometryTileFeature : private util::noncopyable {
+public:
+    virtual ~GeometryTileFeature() = default;
+    virtual FeatureType getType() const = 0;
+    virtual optional<Value> getValue(const std::string& key) const = 0;
+    virtual GeometryCollection getGeometries() const = 0;
+    virtual uint32_t getExtent() const = 0;
+};
+
+class GeometryTileLayer : private util::noncopyable {
+public:
+    virtual ~GeometryTileLayer() = default;
+    virtual std::size_t featureCount() const = 0;
+    virtual util::ptr<const GeometryTileFeature> getFeature(std::size_t) const = 0;
+};
+
+class GeometryTile : private util::noncopyable {
+public:
+    virtual ~GeometryTile() = default;
+    virtual util::ptr<GeometryTileLayer> getLayer(const std::string&) const = 0;
+};
+
+class FileRequest;
+
+class GeometryTileMonitor : private util::noncopyable {
+public:
+    virtual ~GeometryTileMonitor() = default;
+
+    using Callback = std::function<void (std::exception_ptr,
+                                         std::unique_ptr<GeometryTile>,
+                                         optional<SystemTimePoint> modified,
+                                         optional<SystemTimePoint> expires)>;
+    /*
+     * Monitor the tile held by this object for changes. When the tile is loaded for the first time,
+     * or updates, the callback is executed. If an error occurs, the first parameter will be set.
+     * Otherwise it will be null. If there is no data for the requested tile, the second parameter
+     * will be null.
+     *
+     * To cease monitoring, release the returned Request.
+     */
+    virtual std::unique_ptr<FileRequest> monitorTile(const Callback&) = 0;
+};
+
+class GeometryTileFeatureExtractor {
+public:
+    GeometryTileFeatureExtractor(const GeometryTileFeature& feature_)
+        : feature(feature_) {}
+
+    optional<Value> getValue(const std::string& key) const;
+
+private:
+    const GeometryTileFeature& feature;
+};
+
+} // namespace mbgl
+
+#endif