[core] Add ImageSource support to style parsers

1 files changed, 37 insertions, 0 deletions

diff --git a/include/mbgl/style/conversion/coordinate.hpp b/include/mbgl/style/conversion/coordinate.hpp
new file mode 100644
index 0000000000..0adbb9a7ee
--- /dev/null
+++ b/include/mbgl/style/conversion/coordinate.hpp
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <mbgl/style/conversion.hpp>
+#include <mbgl/util/geo.hpp>
+
+namespace mbgl {
+namespace style {
+namespace conversion {
+            
+template<>
+struct Converter<std::unique_ptr<LatLng>> {
+public:
+    template <class V>
+    optional<std::unique_ptr<LatLng>> operator() (const V& value, Error& error) const {
+        if (!isArray(value) || arrayLength(value) < 2 ) {
+            error = { "coordinate array must contain numeric longtitude and latitude values" };
+            return {};
+        }
+        //Style spec uses GeoJSON convention for specifying coordinates
+        optional<float> latitude = toNumber(arrayMember(value, 1));
+        optional<float> longitude = toNumber(arrayMember(value, 0));
+    
+        if (!latitude || !longitude) {
+            error = { "coordinate array must contain numeric longtitude and latitude values" };
+            return {};
+        }
+        if (*latitude < -90 || *latitude > 90 ){
+            error = { "coordinate latitude must be between -90 and 90" };
+            return {};
+        }
+        return { std::make_unique<LatLng>(*latitude, *longitude) };
+    }
+};
+
+} // namespace conversion
+} // namespace style
+} // namespace mbgl