1 files changed, 42 insertions, 0 deletions
diff --git a/platform/macos/app/MGLStyle+MBXAdditions.m b/platform/macos/app/MGLStyle+MBXAdditions.m
new file mode 100644
index 0000000000..be571d8b30
--- /dev/null
+++ b/platform/macos/app/MGLStyle+MBXAdditions.m
@@ -0,0 +1,42 @@
+#import "MGLStyle+MBXAdditions.h"
+
+@implementation MGLStyle (MBXAdditions)
+
++ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingReversedLayers {
+    return [NSSet setWithObject:@"layers"];
+}
+
+- (NS_ARRAY_OF(__kindof MGLStyleLayer *) *)reversedLayers {
+    return self.layers.reverseObjectEnumerator.allObjects;
+}
+
+- (void)setReversedLayers:(NS_ARRAY_OF(__kindof MGLStyleLayer *) *)reversedLayers {
+    self.layers = reversedLayers.reverseObjectEnumerator.allObjects;
+}
+
+- (NSUInteger)countOfReversedLayers {
+    return self.layers.count;
+}
+
+- (id)objectInReversedLayersAtIndex:(NSUInteger)index {
+    NSArray *layers = self.layers;
+    return layers[layers.count - 1 - index];
+}
+
+- (void)getReversedLayers:(__kindof MGLStyleLayer **)buffer range:(NSRange)inRange {
+    NSArray *layers = self.layers;
+    for (NSUInteger i = inRange.location; i < NSMaxRange(inRange); i++) {
+        MGLStyleLayer *styleLayer = layers[layers.count - 1 - i];
+        buffer[i] = styleLayer;
+    }
+}
+
+- (void)insertObject:(__kindof MGLStyleLayer *)object inReversedLayersAtIndex:(NSUInteger)index {
+    [self insertLayer:object atIndex:self.layers.count - index];
+}
+
+- (void)removeObjectFromReversedLayersAtIndex:(NSUInteger)index {
+    [self removeLayer:[self objectInReversedLayersAtIndex:index]];
+}
+
+@end