Add getDiffProps for Text component (facebook#51218)

Summary:
Pull Request resolved: facebook#51218

See title

Changelog: [Internal]

Reviewed By: javache

Differential Revision: D74473101

fbshipit-source-id: 7303a8b184f42e8b264a2d37c5a6570252c64d54

Author: Nick Lefever

packages/react-native/ReactAndroid/src/main/jni/react/fabric/FabricMountingManager.cpp

@@ -226,7 +226,8 @@ jni::local_ref<jobject> getProps(
       (strcmp(newShadowView.componentName, "View") == 0 ||
        strcmp(newShadowView.componentName, "Image") == 0 ||
        strcmp(newShadowView.componentName, "ScrollView") == 0 ||
-       strcmp(newShadowView.componentName, "RawText") == 0)) {
+       strcmp(newShadowView.componentName, "RawText") == 0 ||
+       strcmp(newShadowView.componentName, "Text") == 0)) {
     return ReadableNativeMap::newObjectCxxArgs(
         newProps->getDiffProps(oldProps));
   }

packages/react-native/ReactCommon/react/renderer/components/text/TextProps.cpp

@@ -33,4 +33,21 @@ SharedDebugStringConvertibleList TextProps::getDebugProps() const {
 }
 #endif
 
+#ifdef ANDROID
+
+folly::dynamic TextProps::getDiffProps(const Props* prevProps) const {
+  folly::dynamic result = folly::dynamic::object();
+
+  static const auto defaultProps = TextProps();
+
+  const TextProps* oldProps = prevProps == nullptr
+      ? &defaultProps
+      : static_cast<const TextProps*>(prevProps);
+
+  BaseTextProps::appendTextAttributesProps(result, oldProps);
+
+  return result;
+}
+
+#endif
 } // namespace facebook::react

packages/react-native/ReactCommon/react/renderer/components/text/TextProps.h

@@ -34,6 +34,12 @@ class TextProps : public Props, public BaseTextProps {
 #if RN_DEBUG_STRING_CONVERTIBLE
   SharedDebugStringConvertibleList getDebugProps() const override;
 #endif
+
+#ifdef ANDROID
+
+  folly::dynamic getDiffProps(const Props* prevProps) const override;
+
+#endif
 };
 
 } // namespace facebook::react