Fix frames for in text links

Summary:
Changelog: [internal]

`accessibilityFrame` needs to take scrolling position into account. To fix that, we calculate the position dynamically.

Reviewed By: mdvacca

Differential Revision: D28056789

fbshipit-source-id: 3247b3e6fd64934e99563de83d163f657828e933

React/Fabric/Mounting/ComponentViews/Text/RCTAccessibilityElement.h

@@ -11,6 +11,13 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface RCTAccessibilityElement : UIAccessibilityElement
 
+/*
+ * Frame of the accessibility element in parent coordinate system.
+ * Set to `CGRectZero` to use size of the container.
+ *
+ * Default value: `CGRectZero`.
+ */
+@property (nonatomic, assign) CGRect frame;
 @end
 
 NS_ASSUME_NONNULL_END

React/Fabric/Mounting/ComponentViews/Text/RCTAccessibilityElement.mm

@@ -12,7 +12,11 @@
 - (CGRect)accessibilityFrame
 {
   UIView *container = (UIView *)self.accessibilityContainer;
+  if (CGRectEqualToRect(_frame, CGRectZero)) {
     return UIAccessibilityConvertFrameToScreenCoordinates(container.bounds, container);
+  } else {
+    return UIAccessibilityConvertFrameToScreenCoordinates(_frame, container);
+  }
 }
 
 @end

React/Fabric/Mounting/ComponentViews/Text/RCTParagraphComponentAccessibilityProvider.mm

@@ -62,7 +62,7 @@ using namespace facebook::react;
     accessibilityLabel = RCTNSStringFromString(_attributedString.getString());
   }
   // add first element has the text for the whole textview in order to read out the whole text
-  UIAccessibilityElement *firstElement =
+  RCTAccessibilityElement *firstElement =
       [[RCTAccessibilityElement alloc] initWithAccessibilityContainer:_view.superview];
   firstElement.isAccessibilityElement = YES;
   firstElement.accessibilityTraits = UIAccessibilityTraitStaticText;
@@ -89,8 +89,8 @@ using namespace facebook::react;
                                        truncatedText = fragmentText;
                                        return;
                                      }
-                                     UIAccessibilityElement *element =
-                                         [[UIAccessibilityElement alloc] initWithAccessibilityContainer:self->_view];
+                                     RCTAccessibilityElement *element =
+                                         [[RCTAccessibilityElement alloc] initWithAccessibilityContainer:self->_view];
                                      element.isAccessibilityElement = YES;
                                      if ([value isEqualToString:@"link"]) {
                                        element.accessibilityTraits = UIAccessibilityTraitLink;
@@ -100,8 +100,7 @@ using namespace facebook::react;
                                        numberOfButtons++;
                                      }
                                      element.accessibilityLabel = fragmentText;
-                                     element.accessibilityFrame =
-                                         UIAccessibilityConvertFrameToScreenCoordinates(fragmentRect, self->_view);
+                                     element.frame = fragmentRect;
                                      [elements addObject:element];
                                    }];