[core] Source-driven attribution

Implemented observer callbacks so the style knows when the source’s attribution changes and the map knows when the style’s attribution changes. Also implemented a getter for a tile source’s attribution.

Fixes #2723.

1 files changed, 1 insertions, 0 deletions

diff --git a/include/mbgl/map/map.hpp b/include/mbgl/map/map.hpp
index 914c2cd0b3..2a0d2888bd 100644
--- a/include/mbgl/map/map.hpp
+++ b/include/mbgl/map/map.hpp
@@ -155,6 +155,7 @@ public:
     style::Source* getSource(const std::string& sourceID);
     void addSource(std::unique_ptr<style::Source>);
     void removeSource(const std::string& sourceID);
+    std::vector<std::string> getAttributions() const;
 
     // Layers
     style::Layer* getLayer(const std::string& layerID);