1 files changed, 25 insertions, 0 deletions
diff --git a/src/mbgl/style/source_observer.hpp b/src/mbgl/style/source_observer.hpp
new file mode 100644
index 0000000000..a669e8e756
--- /dev/null
+++ b/src/mbgl/style/source_observer.hpp
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <exception>
+
+namespace mbgl {
+
+class OverscaledTileID;
+
+namespace style {
+
+class Source;
+
+class SourceObserver {
+public:
+    virtual ~SourceObserver() = default;
+
+    virtual void onSourceLoaded(Source&) {}
+    virtual void onSourceError(Source&, std::exception_ptr) {}
+    virtual void onTileLoaded(Source&, const OverscaledTileID&, bool /* isNewTile */) {}
+    virtual void onTileError(Source&, const OverscaledTileID&, std::exception_ptr) {}
+    virtual void onPlacementRedone() {}
+};
+
+} // namespace style
+} // namespace mbgl