1 files changed, 17 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLShapeSource.mm b/platform/darwin/src/MGLShapeSource.mm
index 1425269012..c960f2a4a7 100644
--- a/platform/darwin/src/MGLShapeSource.mm
+++ b/platform/darwin/src/MGLShapeSource.mm
@@ -20,6 +20,7 @@ const MGLShapeSourceOption MGLShapeSourceOptionMaximumZoomLevel = @"MGLShapeSour
 const MGLShapeSourceOption MGLShapeSourceOptionMaximumZoomLevelForClustering = @"MGLShapeSourceOptionMaximumZoomLevelForClustering";
 const MGLShapeSourceOption MGLShapeSourceOptionMinimumZoomLevel = @"MGLShapeSourceOptionMinimumZoomLevel";
 const MGLShapeSourceOption MGLShapeSourceOptionSimplificationTolerance = @"MGLShapeSourceOptionSimplificationTolerance";
+const MGLShapeSourceOption MGLShapeSourceOptionLineDistanceMetrics = @"MGLShapeSourceOptionLineDistanceMetrics";
 
 mbgl::style::GeoJSONOptions MGLGeoJSONOptionsFromDictionary(NSDictionary<MGLShapeSourceOption, id> *options) {
     auto geoJSONOptions = mbgl::style::GeoJSONOptions();
@@ -80,6 +81,14 @@ mbgl::style::GeoJSONOptions MGLGeoJSONOptionsFromDictionary(NSDictionary<MGLShap
         geoJSONOptions.cluster = value.boolValue;
     }
 
+    if (NSNumber *value = options[MGLShapeSourceOptionLineDistanceMetrics]) {
+        if (![value isKindOfClass:[NSNumber class]]) {
+            [NSException raise:NSInvalidArgumentException
+                        format:@"MGLShapeSourceOptionLineDistanceMetrics must be an NSNumber."];
+        }
+        geoJSONOptions.lineMetrics = value.boolValue;
+    }
+
     return geoJSONOptions;
 }
 
@@ -105,6 +114,14 @@ mbgl::style::GeoJSONOptions MGLGeoJSONOptionsFromDictionary(NSDictionary<MGLShap
     auto geoJSONOptions = MGLGeoJSONOptionsFromDictionary(options);
     auto source = std::make_unique<mbgl::style::GeoJSONSource>(identifier.UTF8String, geoJSONOptions);
     if (self = [super initWithPendingSource:std::move(source)]) {
+        if ([shape isMemberOfClass:[MGLShapeCollection class]]) {
+            static dispatch_once_t onceToken;
+            dispatch_once(&onceToken, ^{
+                NSLog(@"MGLShapeCollection initialized with MGLFeatures will not retain attributes."
+                        @"Use MGLShapeCollectionFeature to retain attributes instead."
+                        @"This will be logged only once.");
+            });
+        }
         self.shape = shape;
     }
     return self;