Introduce ReactNativeNewArchitectureFeatureFlagsDefaults

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

@@ -0,0 +1,43 @@
+// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+@file:Suppress("DEPRECATION") // We want to use ReactFeatureFlags here specifically
+
+package com.facebook.react.internal.featureflags
+
+import com.facebook.react.config.ReactFeatureFlags
+
+/**
+ * This class initializes default values for ReactNativeFeatureFlags when the New architecture is
+ * enabled. This class is meant to be overrode only by internal apps migrating to the new
+ * architecture.
+ *
+ * NOTE: Be aware that as a side effect this class also modifies static fields in {@link
+ * com.facebook.react.config.ReactFeatureFlags} when newArchitectureEnabled is true.
+ */
+public open class ReactNativeNewArchitectureFeatureFlagsDefaults(
+    private val newArchitectureEnabled: Boolean
+) : ReactNativeFeatureFlagsDefaults() {
+
+  init {
+    if (newArchitectureEnabled) {
+      // When the new architecture is enabled, we want to set the default values of the flags for
+      // Fabric, TurboModules and Bridgeless as enabled by default.
+      // ReactFeatureFlags is deprecated and will be deleted in 0.77, this code is temporary to
+      // support the new architecture before 0.77 cut.
+      ReactFeatureFlags.enableFabricRenderer = true
+      ReactFeatureFlags.useTurboModules = true
+      ReactFeatureFlags.enableBridgelessArchitecture = true
+    }
+  }
+
+  override fun batchRenderingUpdatesInEventLoop(): Boolean =
+      newArchitectureEnabled || super.batchRenderingUpdatesInEventLoop()
+
+  override fun useTurboModuleInterop(): Boolean =
+      newArchitectureEnabled || super.useTurboModuleInterop()
+
+  override fun useModernRuntimeScheduler(): Boolean = true
+
+  override fun enableMicrotasks(): Boolean = true
+
+  override fun useNativeViewConfigsInBridgelessMode(): Boolean = true
+}