Update TopAlignSpan baseline position from ReactTextView#onLayout with the updated TextView height

#35704 (comment)

Author: fabOnReact

ReactAndroid/src/main/java/com/facebook/react/views/text/ReactTextView.java

@@ -50,8 +50,10 @@ public class ReactTextView extends AppCompatTextView implements ReactCompoundVie
 
   private static final ViewGroup.LayoutParams EMPTY_LAYOUT_PARAMS =
       new ViewGroup.LayoutParams(0, 0);
+  private static final String TAG = "ReactTextView";
 
   private boolean mContainsImages;
+  private boolean mContainsSpans;
   private final int mDefaultGravityHorizontal;
   private final int mDefaultGravityVertical;
   private int mTextAlign;
@@ -182,6 +184,16 @@ private ReactContext getReactContext() {
   protected void onLayout(
       boolean changed, int textViewLeft, int textViewTop, int textViewRight, int textViewBottom) {
     // TODO T62882314: Delete this method when Fabric is fully released in OSS
+    if (getText() instanceof Spanned) {
+      Spanned text = (Spanned) getText();
+      ReactTopAlignSpan[] spans = text.getSpans(0, text.length(), ReactTopAlignSpan.class);
+      if (spans.length != 0) {
+        for (ReactTopAlignSpan span : spans) {
+          span.setHeight(getHeight());
+          invalidate();
+        }
+      }
+    }
     int reactTag = getId();
     if (!(getText() instanceof Spanned)
         || ViewUtil.getUIManagerType(reactTag) == UIManagerType.FABRIC) {

ReactAndroid/src/main/java/com/facebook/react/views/text/ReactTopAlignSpan.java

@@ -13,11 +13,18 @@
 
 /** ratio 0 for center ratio 0.4 for top ratio */
 public class ReactTopAlignSpan extends SuperscriptSpan implements ReactSpan {
+  private static final String TAG = "ReactTopAlignSpan";
+  private Integer mHeight;
+
   @Override
   public void updateDrawState(TextPaint ds) {
-    Rect bounds = new Rect();
-    ds.getTextBounds("1A", 0, 2, bounds);
-    ds.baselineShift -= bounds.top - ds.getFontMetrics().ascent;
+    if (mHeight != null) {
+      ds.baselineShift -= mHeight - ds.getTextSize();
+    }
+  }
+
+  public void setHeight(Integer height) {
+    mHeight = height;
   }
 
   @Override