Kotlinify I18nManagerModule

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

@@ -3329,21 +3329,26 @@ public class com/facebook/react/modules/fresco/SystraceRequestListener : com/fac
 	public fun requiresExtraMap (Ljava/lang/String;)Z
 }
 
-public class com/facebook/react/modules/i18nmanager/I18nManagerModule : com/facebook/fbreact/specs/NativeI18nManagerSpec {
+public final class com/facebook/react/modules/i18nmanager/I18nManagerModule : com/facebook/fbreact/specs/NativeI18nManagerSpec {
 	public fun <init> (Lcom/facebook/react/bridge/ReactApplicationContext;)V
 	public fun allowRTL (Z)V
 	public fun forceRTL (Z)V
 	public fun getTypedExportedConstants ()Ljava/util/Map;
 	public fun swapLeftAndRightInRTL (Z)V
 }
 
-public class com/facebook/react/modules/i18nmanager/I18nUtil {
-	public fun allowRTL (Landroid/content/Context;Z)V
-	public fun doLeftAndRightSwapInRTL (Landroid/content/Context;)Z
-	public fun forceRTL (Landroid/content/Context;Z)V
-	public static fun getInstance ()Lcom/facebook/react/modules/i18nmanager/I18nUtil;
-	public fun isRTL (Landroid/content/Context;)Z
-	public fun swapLeftAndRightInRTL (Landroid/content/Context;Z)V
+public final class com/facebook/react/modules/i18nmanager/I18nUtil {
+	public static final field Companion Lcom/facebook/react/modules/i18nmanager/I18nUtil$Companion;
+	public final fun allowRTL (Landroid/content/Context;Z)V
+	public final fun doLeftAndRightSwapInRTL (Landroid/content/Context;)Z
+	public final fun forceRTL (Landroid/content/Context;Z)V
+	public static final fun getInstance ()Lcom/facebook/react/modules/i18nmanager/I18nUtil;
+	public final fun isRTL (Landroid/content/Context;)Z
+	public final fun swapLeftAndRightInRTL (Landroid/content/Context;Z)V
+}
+
+public final class com/facebook/react/modules/i18nmanager/I18nUtil$Companion {
+	public final fun getInstance ()Lcom/facebook/react/modules/i18nmanager/I18nUtil;
 }
 
 public final class com/facebook/react/modules/image/ImageLoaderModule : com/facebook/fbreact/specs/NativeImageLoaderAndroidSpec, com/facebook/react/bridge/LifecycleEventListener {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/i18nmanager/I18nManagerModule.kt

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.modules.i18nmanager
+
+import android.os.Build
+import com.facebook.fbreact.specs.NativeI18nManagerSpec
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.module.annotations.ReactModule
+
+/** [NativeModule] that allows JS to set allowRTL and get isRTL status. */
+@ReactModule(name = NativeI18nManagerSpec.NAME)
+public class I18nManagerModule(context: ReactApplicationContext?) : NativeI18nManagerSpec(context) {
+  override public fun getTypedExportedConstants(): Map<String, Any> {
+    val context = getReactApplicationContext()
+    val locale =
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+          context.resources.configuration.locales[0]
+        } else {
+          @Suppress("DEPRECATION")
+          context.resources.configuration.locale
+        }
+    return mapOf(
+        "isRTL" to I18nUtil.instance.isRTL(context),
+        "doLeftAndRightSwapInRTL" to I18nUtil.instance.doLeftAndRightSwapInRTL(context),
+        "localeIdentifier" to locale.toString())
+  }
+
+  override fun allowRTL(value: Boolean) {
+    I18nUtil.instance.allowRTL(getReactApplicationContext(), value)
+  }
+
+  override fun forceRTL(value: Boolean) {
+    I18nUtil.instance.forceRTL(getReactApplicationContext(), value)
+  }
+
+  override fun swapLeftAndRightInRTL(value: Boolean) {
+    I18nUtil.instance.swapLeftAndRightInRTL(getReactApplicationContext(), value)
+  }
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/i18nmanager/I18nUtil.kt

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.modules.i18nmanager
+
+import android.content.Context
+import androidx.core.text.TextUtilsCompat
+import androidx.core.view.ViewCompat
+import java.util.Locale
+
+public class I18nUtil private constructor() {
+  /**
+   * Check if the device is currently running on an RTL locale. This only happens when the app:
+   * * is forcing RTL layout, regardless of the active language (for development purpose)
+   * * allows RTL layout when using RTL locale
+   */
+  public fun isRTL(context: Context): Boolean =
+      if (isRTLForced(context)) {
+        true
+      } else isRTLAllowed(context) && isDevicePreferredLanguageRTL
+
+  /**
+   * Should be used very early during app start up Before the bridge is initialized
+   *
+   * @return whether the app allows RTL layout, default is true
+   */
+  private fun isRTLAllowed(context: Context): Boolean =
+      isPrefSet(context, KEY_FOR_PREFS_ALLOWRTL, true)
+
+  public fun allowRTL(context: Context, allowRTL: Boolean) {
+    setPref(context, KEY_FOR_PREFS_ALLOWRTL, allowRTL)
+  }
+
+  public fun doLeftAndRightSwapInRTL(context: Context): Boolean =
+      isPrefSet(context, KEY_FOR_PERFS_MAKE_RTL_FLIP_LEFT_AND_RIGHT_STYLES, true)
+
+  public fun swapLeftAndRightInRTL(context: Context, flip: Boolean) {
+    setPref(context, KEY_FOR_PERFS_MAKE_RTL_FLIP_LEFT_AND_RIGHT_STYLES, flip)
+  }
+
+  /** Could be used to test RTL layout with English Used for development and testing purpose */
+  private fun isRTLForced(context: Context): Boolean =
+      isPrefSet(context, KEY_FOR_PREFS_FORCERTL, false)
+
+  public fun forceRTL(context: Context, forceRTL: Boolean) {
+    setPref(context, KEY_FOR_PREFS_FORCERTL, forceRTL)
+  }
+
+  private val isDevicePreferredLanguageRTL: Boolean
+    // Check if the current device language is RTL
+    get() {
+      val directionality = TextUtilsCompat.getLayoutDirectionFromLocale(Locale.getDefault())
+      return directionality == ViewCompat.LAYOUT_DIRECTION_RTL
+    }
+
+  private fun isPrefSet(context: Context, key: String, defaultValue: Boolean): Boolean =
+      context
+          .getSharedPreferences(SHARED_PREFS_NAME, Context.MODE_PRIVATE)
+          .getBoolean(key, defaultValue)
+
+  private fun setPref(context: Context, key: String, value: Boolean) {
+    val editor = context.getSharedPreferences(SHARED_PREFS_NAME, Context.MODE_PRIVATE).edit()
+    editor.putBoolean(key, value)
+    editor.apply()
+  }
+
+  public companion object {
+    @JvmStatic public val instance: I18nUtil = I18nUtil()
+
+    private const val SHARED_PREFS_NAME = "com.facebook.react.modules.i18nmanager.I18nUtil"
+    private const val KEY_FOR_PREFS_ALLOWRTL = "RCTI18nUtil_allowRTL"
+    private const val KEY_FOR_PREFS_FORCERTL = "RCTI18nUtil_forceRTL"
+    private const val KEY_FOR_PERFS_MAKE_RTL_FLIP_LEFT_AND_RIGHT_STYLES =
+        "RCTI18nUtil_makeRTLFlipLeftAndRightStyles"
+  }
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/style/BorderRadiusStyle.kt

@@ -121,7 +121,7 @@ public data class BorderRadiusStyle(
               bottomRight = bottomRight?.resolve(width, height) ?: 0f,
           )
       LayoutDirection.RTL ->
-          if (I18nUtil.getInstance().doLeftAndRightSwapInRTL(context)) {
+          if (I18nUtil.instance.doLeftAndRightSwapInRTL(context)) {
             ComputedBorderRadius(
                 topLeft = topRight?.resolve(width, height) ?: 0f,
                 topRight = topLeft?.resolve(width, height) ?: 0f,