fix: add padding to fitBounds on ios (#426)

This PR adds missing support for setting padding in `fitBounds` on iOS.

---------

Co-authored-by: Joscha <[email protected]>

Author: markszente

example/lib/controller_page.dart

@@ -78,6 +78,7 @@ class _ControllerPageState extends State<ControllerPage> {
                           latitudeSouth: 45.806154,
                           latitudeNorth: 47.902069,
                         ),
+                        padding: const EdgeInsets.all(50),
                       );
                       debugPrint('fitBounds end');
                     } on PlatformException catch (error) {

maplibre/lib/src/platform/ios/extensions.dart

@@ -71,6 +71,19 @@ extension LngLatBoundsExt on LngLatBounds {
   }
 }
 
+/// Internal extensions on [EdgeInsets].
+extension EdgeInsetsExt on EdgeInsets {
+  /// Convert an [EdgeInsets] to a [UIEdgeInsets].
+  UIEdgeInsets toUIEdgeInsets() {
+    final insets = Struct.create<UIEdgeInsets>()
+      ..top = top
+      ..left = left
+      ..bottom = bottom
+      ..right = right;
+    return insets;
+  }
+}
+
 /// Internal extensions on [MLNCoordinateBounds].
 extension MLNCoordinateBoundsExt on MLNCoordinateBounds {
   /// Convert a [MLNCoordinateBounds] to a [LngLatBounds].

maplibre/lib/src/platform/ios/map_state.dart

@@ -101,8 +101,12 @@ final class MapLibreMapStateIos extends MapLibreMapStateNative
     EdgeInsets padding = EdgeInsets.zero,
   }) async {
     final ffiBounds = bounds.toMLNCoordinateBounds();
-    // TODO support padding with Struct UIEdgeInsets
-    _mapView.setVisibleCoordinateBounds(ffiBounds, animated: true);
+    final ffiPadding = padding.toUIEdgeInsets();
+    _mapView.setVisibleCoordinateBounds$1(
+      ffiBounds,
+      edgePadding: ffiPadding,
+      animated: true,
+    );
   }
 
   @override