Add getRectWithAttributedString() to RCTTextLayoutManager

Summary: Changelog: [iOS][Added] - `getRectWithAttributedString()` aims to get the rect of the fragment with embedded link, which is necessary when building the `accessibilityElement`. In this function, we first enumerate attributedString to find the range of fragments whose `accessibilityRole` is @"link". Then we calculate the rect of the fragment and send to the block and we would define what to do in the block in `RCTParagraphComponentAccessibilityProvider`. Reviewed By: shergin Differential Revision: D22286733 fbshipit-source-id: 4d11cb54375a4e9e72869e646fcb484de089b14b

Author: ZHUANGPP

ReactCommon/fabric/textlayoutmanager/platform/ios/RCTTextLayoutManager.h

@@ -15,6 +15,13 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+/**
+ @abstract Enumeration block for text fragments.
+*/
+
+using RCTTextLayoutFragmentEnumerationBlock =
+ void (^)(CGRect fragmentRect, NSString *_Nonnull fragmentText, NSString *value);
+
 /**
  * iOS-specific TextLayoutManager
  */
@@ -38,6 +45,12 @@ NS_ASSUME_NONNULL_BEGIN
  frame:(CGRect)frame
  atPoint:(CGPoint)point;
 
+- (void)getRectWithAttributedString:(facebook::react::AttributedString)attributedString
+ paragraphAttributes:(facebook::react::ParagraphAttributes)paragraphAttributes
+ enumerateAttribute:(NSString *)enumerateAttribute
+ frame:(CGRect)frame
+ usingBlock:(RCTTextLayoutFragmentEnumerationBlock)block;
+
 @end
 
 NS_ASSUME_NONNULL_END

ReactCommon/fabric/textlayoutmanager/platform/ios/RCTTextLayoutManager.mm

@@ -182,4 +182,44 @@ - (NSAttributedString *)_nsAttributedStringFromAttributedString:(AttributedStrin
  return unwrapManagedObject(sharedNSAttributedString);
 }
 
+- (void)getRectWithAttributedString:(AttributedString)attributedString
+ paragraphAttributes:(ParagraphAttributes)paragraphAttributes
+ enumerateAttribute:(NSString *)enumerateAttribute
+ frame:(CGRect)frame
+ usingBlock:(RCTTextLayoutFragmentEnumerationBlock)block
+{
+ NSTextStorage *textStorage = [self
+ _textStorageAndLayoutManagerWithAttributesString:[self _nsAttributedStringFromAttributedString:attributedString]
+ paragraphAttributes:paragraphAttributes
+ size:frame.size];
+
+ NSLayoutManager *layoutManager = textStorage.layoutManagers.firstObject;
+ NSTextContainer *textContainer = layoutManager.textContainers.firstObject;
+ [layoutManager ensureLayoutForTextContainer:textContainer];
+
+ NSRange glyphRange = [layoutManager glyphRangeForTextContainer:textContainer];
+ NSRange characterRange = [layoutManager characterRangeForGlyphRange:glyphRange actualGlyphRange:NULL];
+
+ [textStorage enumerateAttribute:enumerateAttribute
+ inRange:characterRange
+ options:0
+ usingBlock:^(NSString *value, NSRange range, BOOL *pause) {
+ if (!value) {
+ return;
+ }
+
+ [layoutManager
+ enumerateEnclosingRectsForGlyphRange:range
+ withinSelectedGlyphRange:range
+ inTextContainer:textContainer
+ usingBlock:^(CGRect enclosingRect, BOOL *_Nonnull stop) {
+ block(
+ enclosingRect,
+ [textStorage attributedSubstringFromRange:range].string,
+ value);
+ *stop = YES;
+ }];
+ }];
+}
+
 @end