Kotlinify DeviceInfoModule

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

@@ -3241,10 +3241,10 @@ public abstract interface class com/facebook/react/modules/debug/interfaces/Deve
 	public abstract fun setRemoteJSDebugEnabled (Z)V
 }
 
-public class com/facebook/react/modules/deviceinfo/DeviceInfoModule : com/facebook/fbreact/specs/NativeDeviceInfoSpec, com/facebook/react/bridge/LifecycleEventListener {
+public final class com/facebook/react/modules/deviceinfo/DeviceInfoModule : com/facebook/fbreact/specs/NativeDeviceInfoSpec, com/facebook/react/bridge/LifecycleEventListener {
 	public fun <init> (Landroid/content/Context;)V
 	public fun <init> (Lcom/facebook/react/bridge/ReactApplicationContext;)V
-	public fun emitUpdateDimensionsEvent ()V
+	public final fun emitUpdateDimensionsEvent ()V
 	public fun getTypedExportedConstants ()Ljava/util/Map;
 	public fun invalidate ()V
 	public fun onHostDestroy ()V

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/deviceinfo/DeviceInfoModule.kt

@@ -0,0 +1,85 @@
+/*
+ * 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.deviceinfo
+
+import android.content.Context
+import com.facebook.fbreact.specs.NativeDeviceInfoSpec
+import com.facebook.react.bridge.LifecycleEventListener
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.ReactNoCrashSoftException
+import com.facebook.react.bridge.ReactSoftExceptionLogger
+import com.facebook.react.bridge.ReadableMap
+import com.facebook.react.module.annotations.ReactModule
+import com.facebook.react.uimanager.DisplayMetricsHolder.getDisplayMetricsWritableMap
+import com.facebook.react.uimanager.DisplayMetricsHolder.initDisplayMetricsIfNotInitialized
+
+/** Module that exposes Android Constants to JS. */
+@ReactModule(name = NativeDeviceInfoSpec.NAME)
+public class DeviceInfoModule : NativeDeviceInfoSpec, LifecycleEventListener {
+  private var reactApplicationContext: ReactApplicationContext? = null
+  private var fontScale: Float
+  private var previousDisplayMetrics: ReadableMap? = null
+
+  public constructor(reactContext: ReactApplicationContext) : super(reactContext) {
+    initDisplayMetricsIfNotInitialized(reactContext)
+    fontScale = reactContext.resources.configuration.fontScale
+    reactContext.addLifecycleEventListener(this)
+    reactApplicationContext = reactContext
+  }
+
+  public constructor(context: Context) : super(null) {
+    reactApplicationContext = null
+    initDisplayMetricsIfNotInitialized(context)
+    fontScale = context.resources.configuration.fontScale
+  }
+
+  override public fun getTypedExportedConstants(): Map<String, Any> {
+    val displayMetrics = getDisplayMetricsWritableMap(fontScale.toDouble())
+
+    // Cache the initial dimensions for later comparison in emitUpdateDimensionsEvent
+    previousDisplayMetrics = displayMetrics.copy()
+    return mapOf("Dimensions" to displayMetrics.toHashMap())
+  }
+
+  override fun onHostResume() {
+    val newFontScale = reactApplicationContext?.resources?.configuration?.fontScale
+    if (newFontScale != null && newFontScale != fontScale) {
+      fontScale = newFontScale
+      emitUpdateDimensionsEvent()
+    }
+  }
+
+  override fun onHostPause(): Unit = Unit
+
+  override fun onHostDestroy(): Unit = Unit
+
+  public fun emitUpdateDimensionsEvent() {
+    reactApplicationContext?.let { context ->
+      if (context.hasActiveReactInstance()) {
+        // Don't emit an event to JS if the dimensions haven't changed
+        val displayMetrics = getDisplayMetricsWritableMap(fontScale.toDouble())
+        if (previousDisplayMetrics == null) {
+          previousDisplayMetrics = displayMetrics.copy()
+        } else if (displayMetrics != previousDisplayMetrics) {
+          previousDisplayMetrics = displayMetrics.copy()
+          context.emitDeviceEvent("didUpdateDimensions", displayMetrics)
+        }
+      } else {
+        ReactSoftExceptionLogger.logSoftException(
+            NativeDeviceInfoSpec.NAME,
+            ReactNoCrashSoftException(
+                "No active CatalystInstance, cannot emitUpdateDimensionsEvent"))
+      }
+    }
+  }
+
+  override fun invalidate() {
+    super.invalidate()
+    reactApplicationContext?.removeLifecycleEventListener(this)
+  }
+}