[core] add MapChangeDidFinishLoadingStyle signal (#6371)

4 files changed, 9 insertions, 0 deletions

diff --git a/src/mbgl/map/change.hpp b/src/mbgl/map/change.hpp
index 483ce82893..343d7d8e4f 100644
--- a/src/mbgl/map/change.hpp
+++ b/src/mbgl/map/change.hpp
@@ -19,6 +19,7 @@ enum MapChange : uint8_t {
     MapChangeWillStartRenderingMap = 11,
     MapChangeDidFinishRenderingMap = 12,
     MapChangeDidFinishRenderingMapFullyRendered = 13,
+    MapChangeDidFinishLoadingStyle = 14
 };
 
 } // namespace mbgl
diff --git a/src/mbgl/map/map.cpp b/src/mbgl/map/map.cpp
index ad77ac19fe..1c376e40aa 100644
--- a/src/mbgl/map/map.cpp
+++ b/src/mbgl/map/map.cpp
@@ -39,6 +39,7 @@ public:
     Impl(View&, FileSource&, MapMode, GLContextMode, ConstrainMode, ViewportMode);
 
     void onUpdate(Update) override;
+    void onStyleLoaded() override;
     void onStyleError() override;
     void onResourceError(std::exception_ptr) override;
 
@@ -965,6 +966,10 @@ void Map::Impl::onUpdate(Update flags) {
     updateFlags |= flags;
     asyncUpdate.send();
 }
+    
+void Map::Impl::onStyleLoaded() {
+    view.notifyMapChange(MapChangeDidFinishLoadingStyle);
+}
 
 void Map::Impl::onStyleError() {
     view.notifyMapChange(MapChangeDidFailLoadingMap);
diff --git a/src/mbgl/style/observer.hpp b/src/mbgl/style/observer.hpp
index 6694819bca..f28fdfc084 100644
--- a/src/mbgl/style/observer.hpp
+++ b/src/mbgl/style/observer.hpp
@@ -14,6 +14,7 @@ class Observer : public GlyphAtlasObserver,
 public:
     virtual void onUpdate(Update) {}
     virtual void onStyleError() {}
+    virtual void onStyleLoaded() {}
     virtual void onResourceError(std::exception_ptr) {}
 };
 
diff --git a/src/mbgl/style/style.cpp b/src/mbgl/style/style.cpp
index e519238637..1c0d7f5395 100644
--- a/src/mbgl/style/style.cpp
+++ b/src/mbgl/style/style.cpp
@@ -105,6 +105,8 @@ void Style::setJSON(const std::string& json) {
         observer->onResourceError(error);
 
         return;
+    } else {
+        observer->onStyleLoaded();
     }
 
     for (auto& source : parser.sources) {