fix(ios): #1290 pointerEvents="none" gesture handling

ios/RNSVGNode.h

@@ -7,6 +7,7 @@
  */
 
 #import <React/UIView+React.h>
+#import <React/RCTPointerEvents.h>
 #import "RNSVGCGFCRule.h"
 #import "RNSVGSvgView.h"
 @class RNSVGGroup;
@@ -35,7 +36,13 @@ extern CGFloat const RNSVG_DEFAULT_FONT_SIZE;
 @property (nonatomic, strong) NSString *markerStart;
 @property (nonatomic, strong) NSString *markerMid;
 @property (nonatomic, strong) NSString *markerEnd;
+
+/**
+ * Used to control how touch events are processed.
+ */
+@property (nonatomic, assign) RCTPointerEvents pointerEvents;
 @property (nonatomic, assign) BOOL responsible;
+
 @property (nonatomic, assign) CGAffineTransform ctm;
 @property (nonatomic, assign) CGAffineTransform screenCTM;
 @property (nonatomic, assign) CGAffineTransform matrix;

ios/RNSVGNode.m

@@ -165,6 +165,15 @@ CGFloat const RNSVG_DEFAULT_FONT_SIZE = 12;
     self.backgroundColor = inheritedBackgroundColor;
 }
 
+- (void)setPointerEvents:(RCTPointerEvents)pointerEvents
+{
+  _pointerEvents = pointerEvents;
+  self.userInteractionEnabled = (pointerEvents != RCTPointerEventsNone);
+  if (pointerEvents == RCTPointerEventsBoxNone) {
+    self.accessibilityViewIsModal = NO;
+  }
+}
+
 - (void)setName:(NSString *)name
 {
     if ([name isEqualToString:_name]) {

ios/RNSVGRenderable.m

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#import <React/RCTPointerEvents.h>
 #import "RNSVGRenderable.h"
 #import "RNSVGClipPath.h"
 #import "RNSVGMask.h"
@@ -518,7 +519,7 @@ UInt32 saturate(CGFloat value) {
         return nil;
     }
 
-    BOOL canReceiveTouchEvents = (([self isUserInteractionEnabled] || self.responsible) && ![self isHidden]);
+    BOOL canReceiveTouchEvents = (self.pointerEvents != RCTPointerEventsNone && ![self isHidden]);
     if(!canReceiveTouchEvents) {
       return nil;
     }

ios/ViewManagers/RNSVGNodeManager.m

@@ -238,28 +238,7 @@ RCT_CUSTOM_SHADOW_PROPERTY(direction, id, RNSVGNode) {}
 
 RCT_CUSTOM_VIEW_PROPERTY(pointerEvents, RCTPointerEvents, RNSVGNode)
 {
-  if (!json) {
-    view.userInteractionEnabled = defaultView.userInteractionEnabled;
-    return;
-  }
-
-  switch ([RCTConvert RCTPointerEvents:json]) {
-    case RCTPointerEventsBoxNone:
-    case RCTPointerEventsBoxOnly:
-    case RCTPointerEventsUnspecified:
-      // Pointer events "unspecified" acts as if a stylesheet had not specified,
-      // which is different than "auto" in CSS (which cannot and will not be
-      // supported in `React`. "auto" may override a parent's "none".
-      // Unspecified values do not.
-      // This wouldn't override a container view's `userInteractionEnabled = NO`
-      view.userInteractionEnabled = YES;
-      break;
-    case RCTPointerEventsNone:
-      view.userInteractionEnabled = NO;
-      break;
-    default:
-      view.userInteractionEnabled = NO;
-      RCTLogError(@"UIView base class does not support pointerEvent value: %@", json);
-  }
+    view.pointerEvents = json ? [RCTConvert RCTPointerEvents:json] : defaultView.pointerEvents;
 }
+
 @end