Using modern API to get available size in RCTShadowText

Summary: This is just more correct.

Reviewed By: javache

Differential Revision: D5860755

fbshipit-source-id: 8ae0e92b2faedfb6dfa02f59f2a63a044bb6912d

Libraries/Text/RCTShadowText.m

@@ -116,12 +116,9 @@ - (void)contentSizeMultiplierDidChange:(NSNotification *)note
   parentProperties = [super processUpdatedProperties:applierBlocks
                                     parentProperties:parentProperties];
 
-  UIEdgeInsets padding = self.paddingAsInsets;
-  CGFloat width = self.frame.size.width - (padding.left + padding.right);
-
-
+  CGFloat availableWidth = self.availableSize.width;
   NSNumber *parentTag = [[self reactSuperview] reactTag];
-  NSTextStorage *textStorage = [self buildTextStorageForWidth:width widthMode:YGMeasureModeExactly];
+  NSTextStorage *textStorage = [self buildTextStorageForWidth:availableWidth widthMode:YGMeasureModeExactly];
   CGRect textFrame = [self calculateTextFrame:textStorage];
   BOOL selectable = _selectable;
   [applierBlocks addObject:^(NSDictionary<NSNumber *, UIView *> *viewRegistry) {
@@ -160,7 +157,8 @@ - (void)applyLayoutToChildren:(YGNodeRef)node
              absolutePosition:(CGPoint)absolutePosition
 {
   // Run layout on subviews.
-  NSTextStorage *textStorage = [self buildTextStorageForWidth:self.frame.size.width widthMode:YGMeasureModeExactly];
+  CGFloat availableWidth = self.availableSize.width;
+  NSTextStorage *textStorage = [self buildTextStorageForWidth:availableWidth widthMode:YGMeasureModeExactly];
   NSLayoutManager *layoutManager = textStorage.layoutManagers.firstObject;
   NSTextContainer *textContainer = layoutManager.textContainers.firstObject;
   NSRange glyphRange = [layoutManager glyphRangeForTextContainer:textContainer];
@@ -480,8 +478,7 @@ - (void)_setParagraphStyleOnAttributedString:(NSMutableAttributedString *)attrib
 - (CGRect)calculateTextFrame:(NSTextStorage *)textStorage
 {
   CGRect textFrame = UIEdgeInsetsInsetRect((CGRect){CGPointZero, self.frame.size},
-                                           self.paddingAsInsets);
-
+                                           self.compoundInsets);
 
   if (_adjustsFontSizeToFit) {
     textFrame = [self updateStorage:textStorage toFitFrame:textFrame];
@@ -492,7 +489,6 @@ - (CGRect)calculateTextFrame:(NSTextStorage *)textStorage
 
 - (CGRect)updateStorage:(NSTextStorage *)textStorage toFitFrame:(CGRect)frame
 {
-
   BOOL fits = [self attemptScale:1.0f
                        inStorage:textStorage
                         forFrame:frame];
@@ -507,8 +503,8 @@ - (CGRect)updateStorage:(NSTextStorage *)textStorage toFitFrame:(CGRect)frame
     requiredSize = [self calculateSize:textStorage];
   }
 
-  //Vertically center draw position for new text sizing.
-  frame.origin.y = self.paddingAsInsets.top + RCTRoundPixelValue((CGRectGetHeight(frame) - requiredSize.height) / 2.0f);
+  // Vertically center draw position for new text sizing.
+  frame.origin.y = self.compoundInsets.top + RCTRoundPixelValue((CGRectGetHeight(frame) - requiredSize.height) / 2.0f);
   return frame;
 }