Add mapPadding property (react-native-maps#1750)

* Add mapPadding property

* Fix trailing whitespace in MapView comments

Author: peterjuras

lib/android/src/main/java/com/airbnb/android/react/maps/AirMapManager.java

@@ -93,6 +93,35 @@ public void setMapStyle(AirMapView view, @Nullable String customMapStyleString)
     view.map.setMapStyle(new MapStyleOptions(customMapStyleString));
   }
 
+  @ReactProp(name = "mapPadding")
+  public void setMapPadding(AirMapView view, @Nullable ReadableMap padding) {
+    int left = 0;
+    int top = 0;
+    int right = 0;
+    int bottom = 0;
+    double density = (double) view.getResources().getDisplayMetrics().density;
+    
+    if (padding != null) {
+      if (padding.hasKey("left")) {
+        left = (int) (padding.getDouble("left") * density);
+      }
+
+      if (padding.hasKey("top")) {
+        top = (int) (padding.getDouble("top") * density);
+      }
+
+      if (padding.hasKey("right")) {
+        right = (int) (padding.getDouble("right") * density);
+      }
+
+      if (padding.hasKey("bottom")) {
+        bottom = (int) (padding.getDouble("bottom") * density);
+      }
+    }
+
+    view.map.setPadding(left, top, right, bottom);
+  }
+
   @ReactProp(name = "showsUserLocation", defaultBoolean = false)
   public void setShowsUserLocation(AirMapView view, boolean showUserLocation) {
     view.setShowsUserLocation(showUserLocation);

lib/components/MapView.js

@@ -303,6 +303,15 @@ const propTypes = {
    */
   liteMode: PropTypes.bool,
 
+  /**
+   * (Google Maps only)
+   *
+   * Padding that is used by the Google Map View to position
+   * the camera, legal labels and buttons
+   *
+   */
+  mapPadding: EdgeInsetsPropType,
+
   /**
    * Maximum size of area that can be displayed.
    *

lib/ios/AirGoogleMaps/AIRGoogleMap.h

@@ -18,6 +18,7 @@
 @property (nonatomic, assign) MKCoordinateRegion initialRegion;
 @property (nonatomic, assign) MKCoordinateRegion region;
 @property (nonatomic, assign) NSString *customMapStyleString;
+@property (nonatomic, assign) UIEdgeInsets mapPadding;
 @property (nonatomic, copy) RCTBubblingEventBlock onMapReady;
 @property (nonatomic, copy) RCTBubblingEventBlock onPress;
 @property (nonatomic, copy) RCTBubblingEventBlock onLongPress;

lib/ios/AirGoogleMaps/AIRGoogleMap.m

@@ -219,6 +219,13 @@ - (void)idleAtCameraPosition:(GMSCameraPosition *)position {
   if (self.onChange) self.onChange(event);  // complete
 }
 
+- (void)setMapPadding:(UIEdgeInsets)mapPadding {
+  self.padding = mapPadding;
+}
+
+- (UIEdgeInsets)mapPadding {
+  return self.padding;
+}
 
 - (void)setScrollEnabled:(BOOL)scrollEnabled {
   self.settings.scrollGestures = scrollEnabled;

lib/ios/AirGoogleMaps/AIRGoogleMapManager.m

@@ -63,6 +63,7 @@ - (UIView *)view
 RCT_EXPORT_VIEW_PROPERTY(showsMyLocationButton, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(showsIndoorLevelPicker, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(customMapStyleString, NSString)
+RCT_EXPORT_VIEW_PROPERTY(mapPadding, UIEdgeInsets)
 RCT_EXPORT_VIEW_PROPERTY(onMapReady, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onPress, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onLongPress, RCTBubblingEventBlock)