1 files changed, 29 insertions, 0 deletions
diff --git a/src/mbgl/renderer/source_state.hpp b/src/mbgl/renderer/source_state.hpp
new file mode 100644
index 0000000000..7217302630
--- /dev/null
+++ b/src/mbgl/renderer/source_state.hpp
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <mbgl/style/conversion.hpp>
+#include <mbgl/util/feature.hpp>
+
+namespace mbgl {
+
+class RenderTile;
+
+class SourceFeatureState {
+public:
+    SourceFeatureState() = default;
+    ~SourceFeatureState() = default;
+
+    void updateState(const optional<std::string>& sourceLayerID, const std::string& featureID,
+                     const FeatureState& newState);
+    void getState(FeatureState& result, const optional<std::string>& sourceLayerID, const std::string& featureID) const;
+    void removeState(const optional<std::string>& sourceLayerID, const optional<std::string>& featureID,
+                     const optional<std::string>& stateKey);
+
+    void coalesceChanges(std::vector<RenderTile>& tiles);
+
+private:
+    LayerFeatureStates currentStates;
+    LayerFeatureStates stateChanges;
+    LayerFeatureStates deletedStates;
+};
+
+} // namespace mbgl