Migrate enableSpannableBuildingUnification to new feature flag system (#42716)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/42716

Migrates this to the new flag system just added.

Made a quick change to the Android template, to mark Kotlin accessors as `JvmStatic` to make calling from Java more idiomatic.

Next diff will wire to MC.

Changelog: [Internal]

Reviewed By: rubennorte, mdvacca

Differential Revision: D53198874

fbshipit-source-id: 6ab5b279d9ac59733c6e820c25be72383ce0e54a

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -1906,7 +1906,6 @@ public class com/facebook/react/config/ReactFeatureFlags {
 	public static field enableMountHooks Z
 	public static field enableOnDemandReactChoreographer Z
 	public static field enableRemoveDeleteTreeInstruction Z
-	public static field enableSpannableBuildingUnification Z
 	public static field enableTextSpannableCache Z
 	public static field enableViewRecycling Z
 	public static field excludeYogaFromRawProps Z

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/config/ReactFeatureFlags.java

@@ -152,7 +152,4 @@ public class ReactFeatureFlags {
    *  when there is work to do.
    */
   public static boolean enableOnDemandReactChoreographer = false;
-
-  /** Enables the new unified {@link android.text.Spannable} building logic. */
-  public static boolean enableSpannableBuildingUnification = false;
 }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlags.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<52367278b4d0fdf7f436bd8c511d4ffe>>
+ * @generated SignedSource<<82a7973a820b75c46977931a8b178493>>
  */
 
 /**
@@ -31,23 +31,33 @@ object ReactNativeFeatureFlags {
   /**
    * Common flag for testing. Do NOT modify.
    */
+  @JvmStatic
   fun commonTestFlag() = accessor.commonTestFlag()
 
   /**
    * When enabled, it uses the modern fork of RuntimeScheduler that allows scheduling tasks with priorities from any thread.
    */
+  @JvmStatic
   fun useModernRuntimeScheduler() = accessor.useModernRuntimeScheduler()
 
   /**
    * Enables the use of microtasks in Hermes (scheduling) and RuntimeScheduler (execution).
    */
+  @JvmStatic
   fun enableMicrotasks() = accessor.enableMicrotasks()
 
   /**
    * When enabled, the RuntimeScheduler processing the event loop will batch all rendering updates and dispatch them together at the end of each iteration of the loop.
    */
+  @JvmStatic
   fun batchRenderingUpdatesInEventLoop() = accessor.batchRenderingUpdatesInEventLoop()
 
+  /**
+   * Uses new, deduplicated logic for constructing Android Spannables from text fragments
+   */
+  @JvmStatic
+  fun enableSpannableBuildingUnification() = accessor.enableSpannableBuildingUnification()
+
   /**
    * Overrides the feature flags with the ones provided by the given provider
    * (generally one that extends `ReactNativeFeatureFlagsDefaults`).

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<920bb26d238f935f63a77943df7ef6e2>>
+ * @generated SignedSource<<881b7f9eb6b1765764b70719155a457c>>
  */
 
 /**
@@ -24,6 +24,7 @@ class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAccessor {
   private var useModernRuntimeSchedulerCache: Boolean? = null
   private var enableMicrotasksCache: Boolean? = null
   private var batchRenderingUpdatesInEventLoopCache: Boolean? = null
+  private var enableSpannableBuildingUnificationCache: Boolean? = null
 
   override fun commonTestFlag(): Boolean {
     var cached = commonTestFlagCache
@@ -61,6 +62,15 @@ class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAccessor {
     return cached
   }
 
+  override fun enableSpannableBuildingUnification(): Boolean {
+    var cached = enableSpannableBuildingUnificationCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.enableSpannableBuildingUnification()
+      enableSpannableBuildingUnificationCache = cached
+    }
+    return cached
+  }
+
   override fun override(provider: ReactNativeFeatureFlagsProvider) =
       ReactNativeFeatureFlagsCxxInterop.override(provider as Any)
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxInterop.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<19d0606854e3e34efe67acf9dc1d26b4>>
+ * @generated SignedSource<<c4908662a6c752ef8dc85f7eb86d1df4>>
  */
 
 /**
@@ -36,6 +36,8 @@ object ReactNativeFeatureFlagsCxxInterop {
 
   @DoNotStrip @JvmStatic external fun batchRenderingUpdatesInEventLoop(): Boolean
 
+  @DoNotStrip @JvmStatic external fun enableSpannableBuildingUnification(): Boolean
+
   @DoNotStrip @JvmStatic external fun override(provider: Any)
 
   @DoNotStrip @JvmStatic external fun dangerouslyReset()

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsDefaults.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<932fd2768c81d5a5f49929c89d6659ff>>
+ * @generated SignedSource<<44159bbcf15dc403e40656c71d84516a>>
  */
 
 /**
@@ -30,4 +30,6 @@ open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvider {
   override fun enableMicrotasks(): Boolean = false
 
   override fun batchRenderingUpdatesInEventLoop(): Boolean = false
+
+  override fun enableSpannableBuildingUnification(): Boolean = false
 }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsLocalAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<6254686d99a8bfd0531ed629655cf673>>
+ * @generated SignedSource<<85d0ebc43b7c390be7dd89c58f1b7a7a>>
  */
 
 /**
@@ -28,6 +28,7 @@ class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAccessor {
   private var useModernRuntimeSchedulerCache: Boolean? = null
   private var enableMicrotasksCache: Boolean? = null
   private var batchRenderingUpdatesInEventLoopCache: Boolean? = null
+  private var enableSpannableBuildingUnificationCache: Boolean? = null
 
   override fun commonTestFlag(): Boolean {
     var cached = commonTestFlagCache
@@ -69,6 +70,16 @@ class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAccessor {
     return cached
   }
 
+  override fun enableSpannableBuildingUnification(): Boolean {
+    var cached = enableSpannableBuildingUnificationCache
+    if (cached == null) {
+      cached = currentProvider.enableSpannableBuildingUnification()
+      accessedFeatureFlags.add("enableSpannableBuildingUnification")
+      enableSpannableBuildingUnificationCache = cached
+    }
+    return cached
+  }
+
   override fun override(provider: ReactNativeFeatureFlagsProvider) {
     if (accessedFeatureFlags.isNotEmpty()) {
       val accessedFeatureFlagsStr = accessedFeatureFlags.joinToString(separator = ", ") { it }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<c5c87368aae4df966b4b7971aadb79f2>>
+ * @generated SignedSource<<d5db40f4f25503513c4128892fd12e3f>>
  */
 
 /**
@@ -30,4 +30,6 @@ interface ReactNativeFeatureFlagsProvider {
   @DoNotStrip fun enableMicrotasks(): Boolean
 
   @DoNotStrip fun batchRenderingUpdatesInEventLoop(): Boolean
+
+  @DoNotStrip fun enableSpannableBuildingUnification(): Boolean
 }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/text/ReactBaseTextShadowNode.java

@@ -21,7 +21,7 @@ import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.bridge.ReadableMap;
 import com.facebook.react.common.ReactConstants;
-import com.facebook.react.config.ReactFeatureFlags;
+import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags;
 import com.facebook.react.uimanager.IllegalViewOperationException;
 import com.facebook.react.uimanager.LayoutShadowNode;
 import com.facebook.react.uimanager.NativeViewHierarchyOptimizer;
@@ -93,7 +93,7 @@ public abstract class ReactBaseTextShadowNode extends LayoutShadowNode
       boolean supportsInlineViews,
       @Nullable Map<Integer, ReactShadowNode> inlineViews,
       int start) {
-    if (ReactFeatureFlags.enableSpannableBuildingUnification) {
+    if (ReactNativeFeatureFlags.enableSpannableBuildingUnification()) {
       buildSpannedFromShadowNodeUnified(
           textShadowNode, sb, ops, parentTextAttributes, supportsInlineViews, inlineViews, start);
     } else {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/text/TextLayoutManager.java

@@ -31,7 +31,7 @@ import com.facebook.react.bridge.ReadableNativeMap;
 import com.facebook.react.bridge.WritableArray;
 import com.facebook.react.common.ReactConstants;
 import com.facebook.react.common.build.ReactBuildConfig;
-import com.facebook.react.config.ReactFeatureFlags;
+import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags;
 import com.facebook.react.uimanager.PixelUtil;
 import com.facebook.react.uimanager.ReactAccessibilityDelegate.AccessibilityRole;
 import com.facebook.react.uimanager.ReactAccessibilityDelegate.Role;
@@ -118,7 +118,7 @@ public class TextLayoutManager {
       ReadableArray fragments,
       SpannableStringBuilder sb,
       List<SetSpanOperation> ops) {
-    if (ReactFeatureFlags.enableSpannableBuildingUnification) {
+    if (ReactNativeFeatureFlags.enableSpannableBuildingUnification()) {
       buildSpannableFromFragmentsUnified(context, fragments, sb, ops);
     } else {
       buildSpannableFromFragmentsDuplicated(context, fragments, sb, ops);

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/text/TextLayoutManagerMapBuffer.java

@@ -32,7 +32,7 @@ import com.facebook.react.common.ReactConstants;
 import com.facebook.react.common.build.ReactBuildConfig;
 import com.facebook.react.common.mapbuffer.MapBuffer;
 import com.facebook.react.common.mapbuffer.ReadableMapBuffer;
-import com.facebook.react.config.ReactFeatureFlags;
+import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags;
 import com.facebook.react.uimanager.PixelUtil;
 import com.facebook.react.uimanager.ReactAccessibilityDelegate.AccessibilityRole;
 import com.facebook.react.uimanager.ReactAccessibilityDelegate.Role;
@@ -140,7 +140,7 @@ public class TextLayoutManagerMapBuffer {
 
   private static void buildSpannableFromFragments(
       Context context, MapBuffer fragments, SpannableStringBuilder sb, List<SetSpanOperation> ops) {
-    if (ReactFeatureFlags.enableSpannableBuildingUnification) {
+    if (ReactNativeFeatureFlags.enableSpannableBuildingUnification()) {
       buildSpannableFromFragmentsUnified(context, fragments, sb, ops);
     } else {
       buildSpannableFromFragmentsDuplicated(context, fragments, sb, ops);

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<bd4482119f1c4963aa4ad1e354f9107d>>
+ * @generated SignedSource<<36acddfcb6c038dbf523ad669bcedeba>>
  */
 
 /**
@@ -43,6 +43,11 @@ bool JReactNativeFeatureFlagsCxxInterop::batchRenderingUpdatesInEventLoop(
   return ReactNativeFeatureFlags::batchRenderingUpdatesInEventLoop();
 }
 
+bool JReactNativeFeatureFlagsCxxInterop::enableSpannableBuildingUnification(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::enableSpannableBuildingUnification();
+}
+
 void JReactNativeFeatureFlagsCxxInterop::override(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/,
     jni::alias_ref<jobject> provider) {
@@ -72,6 +77,9 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
       makeNativeMethod(
         "batchRenderingUpdatesInEventLoop",
         JReactNativeFeatureFlagsCxxInterop::batchRenderingUpdatesInEventLoop),
+      makeNativeMethod(
+        "enableSpannableBuildingUnification",
+        JReactNativeFeatureFlagsCxxInterop::enableSpannableBuildingUnification),
   });
 }
 

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<b7304c29a002ce5a8a612d7a08d798ff>>
+ * @generated SignedSource<<b903dab48f817589883d7f41cc5674f0>>
  */
 
 /**
@@ -42,6 +42,9 @@ class JReactNativeFeatureFlagsCxxInterop
   static bool batchRenderingUpdatesInEventLoop(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 
+  static bool enableSpannableBuildingUnification(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
   static void override(
       facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>,
       jni::alias_ref<jobject> provider);

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/ReactNativeFeatureFlagsProviderHolder.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<91f988022fbff7eba632f2ba46056025>>
+ * @generated SignedSource<<5f99c47d357e45524b359e6517d1f2eb>>
  */
 
 /**
@@ -51,4 +51,10 @@ bool ReactNativeFeatureFlagsProviderHolder::batchRenderingUpdatesInEventLoop() {
   return method(javaProvider_);
 }
 
+bool ReactNativeFeatureFlagsProviderHolder::enableSpannableBuildingUnification() {
+  static const auto method =
+      getJClass()->getMethod<jboolean()>("enableSpannableBuildingUnification");
+  return method(javaProvider_);
+}
+
 } // namespace facebook::react

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/ReactNativeFeatureFlagsProviderHolder.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<3550f7ee28a53a4024a48301ee38ce7e>>
+ * @generated SignedSource<<6aaa06ae0c12de2f432374d0cd048460>>
  */
 
 /**
@@ -39,6 +39,7 @@ class ReactNativeFeatureFlagsProviderHolder
   bool useModernRuntimeScheduler() override;
   bool enableMicrotasks() override;
   bool batchRenderingUpdatesInEventLoop() override;
+  bool enableSpannableBuildingUnification() override;
 
  private:
   jni::global_ref<jobject> javaProvider_;

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<eb9bb346a84321197849de2dd8bf7dc3>>
+ * @generated SignedSource<<809c23db6d36e18d448554900e462aa0>>
  */
 
 /**
@@ -37,6 +37,10 @@ bool ReactNativeFeatureFlags::batchRenderingUpdatesInEventLoop() {
   return getAccessor().batchRenderingUpdatesInEventLoop();
 }
 
+bool ReactNativeFeatureFlags::enableSpannableBuildingUnification() {
+  return getAccessor().enableSpannableBuildingUnification();
+}
+
 void ReactNativeFeatureFlags::override(
     std::unique_ptr<ReactNativeFeatureFlagsProvider> provider) {
   getAccessor().override(std::move(provider));

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<be203871f94ca134f75b803b7d79a5ab>>
+ * @generated SignedSource<<ea6c88fb2c3fcaa35b5886b8f8ceb769>>
  */
 
 /**
@@ -52,6 +52,11 @@ class ReactNativeFeatureFlags {
    */
   static bool batchRenderingUpdatesInEventLoop();
 
+  /**
+   * Uses new, deduplicated logic for constructing Android Spannables from text fragments
+   */
+  static bool enableSpannableBuildingUnification();
+
   /**
    * Overrides the feature flags with the ones provided by the given provider
    * (generally one that extends `ReactNativeFeatureFlagsDefaults`).

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsAccessor.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<5df50987338c0541436b11cd5433013c>>
+ * @generated SignedSource<<15858c6ab96e90350aa5f29eb108b051>>
  */
 
 /**
@@ -96,6 +96,23 @@ bool ReactNativeFeatureFlagsAccessor::batchRenderingUpdatesInEventLoop() {
   return batchRenderingUpdatesInEventLoop_.value();
 }
 
+bool ReactNativeFeatureFlagsAccessor::enableSpannableBuildingUnification() {
+  if (!enableSpannableBuildingUnification_.has_value()) {
+    // Mark the flag as accessed.
+    static const char* flagName = "enableSpannableBuildingUnification";
+    if (std::find(
+            accessedFeatureFlags_.begin(),
+            accessedFeatureFlags_.end(),
+            flagName) == accessedFeatureFlags_.end()) {
+      accessedFeatureFlags_.push_back(flagName);
+    }
+
+    enableSpannableBuildingUnification_.emplace(currentProvider_->enableSpannableBuildingUnification());
+  }
+
+  return enableSpannableBuildingUnification_.value();
+}
+
 void ReactNativeFeatureFlagsAccessor::override(
     std::unique_ptr<ReactNativeFeatureFlagsProvider> provider) {
   if (!accessedFeatureFlags_.empty()) {

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsAccessor.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<11335a9c0d793a3a5a0dfdb01cd43efd>>
+ * @generated SignedSource<<938f1f3ad6aa3343beb3ad7707a49a87>>
  */
 
 /**
@@ -34,6 +34,7 @@ class ReactNativeFeatureFlagsAccessor {
   bool useModernRuntimeScheduler();
   bool enableMicrotasks();
   bool batchRenderingUpdatesInEventLoop();
+  bool enableSpannableBuildingUnification();
 
   void override(std::unique_ptr<ReactNativeFeatureFlagsProvider> provider);
 
@@ -45,6 +46,7 @@ class ReactNativeFeatureFlagsAccessor {
   std::optional<bool> useModernRuntimeScheduler_;
   std::optional<bool> enableMicrotasks_;
   std::optional<bool> batchRenderingUpdatesInEventLoop_;
+  std::optional<bool> enableSpannableBuildingUnification_;
 };
 
 } // namespace facebook::react

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsDefaults.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<b354cb54b822e2dfa3e093d39fb4da4e>>
+ * @generated SignedSource<<18dc9a1aa23d156bc94e426ee1864359>>
  */
 
 /**
@@ -42,6 +42,10 @@ class ReactNativeFeatureFlagsDefaults : public ReactNativeFeatureFlagsProvider {
   bool batchRenderingUpdatesInEventLoop() override {
     return false;
   }
+
+  bool enableSpannableBuildingUnification() override {
+    return false;
+  }
 };
 
 } // namespace facebook::react

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsProvider.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<6bf1fc0d7b32a36041c2371fe191792b>>
+ * @generated SignedSource<<2828ad8eb7ea0a0ea9cb0240eadedeb8>>
  */
 
 /**
@@ -29,6 +29,7 @@ class ReactNativeFeatureFlagsProvider {
   virtual bool useModernRuntimeScheduler() = 0;
   virtual bool enableMicrotasks() = 0;
   virtual bool batchRenderingUpdatesInEventLoop() = 0;
+  virtual bool enableSpannableBuildingUnification() = 0;
 };
 
 } // namespace facebook::react

packages/react-native/ReactCommon/react/nativemodule/featureflags/NativeReactNativeFeatureFlags.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<01b940f6716765f9359c42180db497c0>>
+ * @generated SignedSource<<de38e5abc0430aedc0fe94f0c73fee3d>>
  */
 
 /**
@@ -55,4 +55,9 @@ bool NativeReactNativeFeatureFlags::batchRenderingUpdatesInEventLoop(
   return ReactNativeFeatureFlags::batchRenderingUpdatesInEventLoop();
 }
 
+bool NativeReactNativeFeatureFlags::enableSpannableBuildingUnification(
+    jsi::Runtime& /*runtime*/) {
+  return ReactNativeFeatureFlags::enableSpannableBuildingUnification();
+}
+
 } // namespace facebook::react

packages/react-native/ReactCommon/react/nativemodule/featureflags/NativeReactNativeFeatureFlags.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<200fe2cf84a044164c60f6dd3c5569dd>>
+ * @generated SignedSource<<b6444bb426632dfb672312df3384127f>>
  */
 
 /**
@@ -37,6 +37,8 @@ class NativeReactNativeFeatureFlags
   bool enableMicrotasks(jsi::Runtime& runtime);
 
   bool batchRenderingUpdatesInEventLoop(jsi::Runtime& runtime);
+
+  bool enableSpannableBuildingUnification(jsi::Runtime& runtime);
 };
 
 } // namespace facebook::react

packages/react-native/scripts/featureflags/ReactNativeFeatureFlags.json

@@ -15,6 +15,10 @@
     "batchRenderingUpdatesInEventLoop": {
       "description": "When enabled, the RuntimeScheduler processing the event loop will batch all rendering updates and dispatch them together at the end of each iteration of the loop.",
       "defaultValue": false
+    },
+    "enableSpannableBuildingUnification": {
+      "description": "Uses new, deduplicated logic for constructing Android Spannables from text fragments",
+      "defaultValue": false
     }
   },
   "jsOnly": {

packages/react-native/scripts/featureflags/templates/android/ReactNativeFeatureFlags.kt-template.js

@@ -41,6 +41,7 @@ ${Object.entries(config.common)
       `  /**
    * ${flagConfig.description}
    */
+  @JvmStatic
   fun ${flagName}() = accessor.${flagName}()`,
   )
   .join('\n\n')}

packages/react-native/src/private/featureflags/NativeReactNativeFeatureFlags.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<564159837241d197ebc3084ff9e72b7c>>
+ * @generated SignedSource<<80726297990981a85ae106f8566ec662>>
  * @flow strict-local
  */
 
@@ -27,6 +27,7 @@ export interface Spec extends TurboModule {
   +useModernRuntimeScheduler?: () => boolean;
   +enableMicrotasks?: () => boolean;
   +batchRenderingUpdatesInEventLoop?: () => boolean;
+  +enableSpannableBuildingUnification?: () => boolean;
 }
 
 const NativeReactNativeFeatureFlags: ?Spec = TurboModuleRegistry.get<Spec>(

packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<4e4ce58c1ce1a95355bba0dfe099e26e>>
+ * @generated SignedSource<<fbc0fd8f6eb3577e80254d855b2cd026>>
  * @flow strict-local
  */
 
@@ -37,6 +37,7 @@ export type ReactNativeFeatureFlags = {
   useModernRuntimeScheduler: Getter<boolean>,
   enableMicrotasks: Getter<boolean>,
   batchRenderingUpdatesInEventLoop: Getter<boolean>,
+  enableSpannableBuildingUnification: Getter<boolean>,
 }
 
 /**
@@ -60,6 +61,10 @@ export const enableMicrotasks: Getter<boolean> = createNativeFlagGetter('enableM
  * When enabled, the RuntimeScheduler processing the event loop will batch all rendering updates and dispatch them together at the end of each iteration of the loop.
  */
 export const batchRenderingUpdatesInEventLoop: Getter<boolean> = createNativeFlagGetter('batchRenderingUpdatesInEventLoop', false);
+/**
+ * Uses new, deduplicated logic for constructing Android Spannables from text fragments
+ */
+export const enableSpannableBuildingUnification: Getter<boolean> = createNativeFlagGetter('enableSpannableBuildingUnification', false);
 
 /**
  * Overrides the feature flags with the provided methods.