[macos] Avoid negative content insets (#6102)

Fixed an issue in which a map view that doesn’t occupy the entire window would consider its center point to be the window’s center point rather than the view’s.

platform/macos/CHANGELOG.md

@@ -7,6 +7,7 @@
 * A new runtime styling API allows you to adjust the style and content of the base map dynamically. All the options available in [Mapbox Studio](https://www.mapbox.com/studio/) are now exposed via MGLStyle and subclasses of MGLStyleLayer and MGLSource. ([#5727](https://github.com/mapbox/mapbox-gl-native/pull/5727))
 * Improved offline and ambient cache database performance. ([#5796](https://github.com/mapbox/mapbox-gl-native/pull/5796))
 * Added `showAnnotations:animated:` and `showAnnotations:edgePadding:animated:`, which moves the map viewport to show the specified annotations. ([#5749](https://github.com/mapbox/mapbox-gl-native/pull/5749))
+* Fixed an issue where the map view’s center would always be calculated as if the view occupied the entire window. ([#6102](https://github.com/mapbox/mapbox-gl-native/pull/6102))
 * To make an MGLPolyline or MGLPolygon span the antimeridian, specify coordinates with longitudes greater than 180° or less than −180°. ([#6088](https://github.com/mapbox/mapbox-gl-native/pull/6088))
 * MGLMapView’s `styleURL` property can now be set to an absolute file URL. ([#6026](https://github.com/mapbox/mapbox-gl-native/pull/6026))
 * GeoJSON sources specified by the stylesheet at design time now support `cluster`, `clusterMaxZoom`, and `clusterRadius` attributes for clustering point features on the base map. ([#5724](https://github.com/mapbox/mapbox-gl-native/pull/5724))

platform/macos/src/MGLMapView.mm

@@ -1180,8 +1180,8 @@ public:
         NSRect contentLayoutRect = [self convertRect:self.window.contentLayoutRect fromView:nil];
         if (NSMaxX(contentLayoutRect) > 0 && NSMaxY(contentLayoutRect) > 0) {
             contentInsets = NSEdgeInsetsMake(NSHeight(self.bounds) - NSMaxY(contentLayoutRect),
-                                             NSMinX(contentLayoutRect),
-                                             NSMinY(contentLayoutRect),
+                                             MAX(NSMinX(contentLayoutRect), 0),
+                                             MAX(NSMinY(contentLayoutRect), 0),
                                              NSWidth(self.bounds) - NSMaxX(contentLayoutRect));
         }
     } else {