[ios, macos] Add feature initializer

This adds a features initializer to MGLGeoJSONSource. The initializer
takes shapes and converts them to JSON representation before passing
to core. This also adds methods to the MGLShape concrete subclasses
so that they can represent themselves in NSDictionary form suitable
for transforming to JSON (GeoJSON).

1 files changed, 26 insertions, 0 deletions

diff --git a/platform/ios/app/MBXViewController.m b/platform/ios/app/MBXViewController.m
index 5a3c56af69..3ee405fd04 100644
--- a/platform/ios/app/MBXViewController.m
+++ b/platform/ios/app/MBXViewController.m
@@ -61,6 +61,7 @@ typedef NS_ENUM(NSInteger, MBXSettingsRuntimeStylingRows) {
     MBXSettingsRuntimeStylingFilteredFill,
     MBXSettingsRuntimeStylingFilteredLines,
     MBXSettingsRuntimeStylingNumericFilteredFill,
+    MBXSettingsRuntimeStylingStyleQuery,
 };
 
 typedef NS_ENUM(NSInteger, MBXSettingsMiscellaneousRows) {
@@ -304,6 +305,7 @@ typedef NS_ENUM(NSInteger, MBXSettingsMiscellaneousRows) {
                 @"Style Fill With Filter",
                 @"Style Lines With Filter",
                 @"Style Fill With Numeric Filter",
+                @"Style Query For GeoJSON",
             ]];
             break;
         case MBXSettingsMiscellaneous:
@@ -429,6 +431,9 @@ typedef NS_ENUM(NSInteger, MBXSettingsMiscellaneousRows) {
                 case MBXSettingsRuntimeStylingNumericFilteredFill:
                     [self styleNumericFilteredFills];
                     break;
+                case MBXSettingsRuntimeStylingStyleQuery:
+                    [self styleQuery];
+                    break;
                 default:
                     NSAssert(NO, @"All runtime styling setting rows should be implemented");
                     break;
@@ -785,6 +790,27 @@ typedef NS_ENUM(NSInteger, MBXSettingsMiscellaneousRows) {
     });
 }
 
+
+- (void)styleQuery
+{
+    CGRect queryRect = CGRectInset(self.mapView.bounds, 100, 200);
+    NSArray *features = [self.mapView visibleFeaturesInRect:queryRect];
+    
+//    NSMutableArray *polygonFeatures = [NSMutableArray array];
+//    for (id<MGLFeature> feature in features) {
+//        if ([feature isMemberOfClass:[MGLPolygonFeature class]]) {
+//            [polygonFeatures addObject:feature];
+//        }
+//    }
+    
+    MGLGeoJSONSource *source = [[MGLGeoJSONSource alloc] initWithIdentifier:@"query-id" features:features options:nil];
+    [self.mapView.style addSource:source];
+    
+    MGLFillStyleLayer *fillLayer = [[MGLFillStyleLayer alloc] initWithIdentifier:@"query-layer-id" source:source];
+    fillLayer.fillColor = [UIColor blueColor];
+    [self.mapView.style addLayer:fillLayer];
+}
+
 - (IBAction)startWorldTour
 {
     _isTouringWorld = YES;