Add ExtraWindowEventListener interface

Author: zoontek

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/ExtraWindowEventListener.kt

@@ -0,0 +1,29 @@
+/*
+ * 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.bridge
+
+import android.view.Window
+
+/**
+ * Listener for receiving extra window creation and destruction events.
+ *
+ * This allows modules to react to new windows being added or removed, such as Dialog windows
+ * registered by Modal components. Modules like StatusBarModule can implement this interface to
+ * apply their configuration to all active windows.
+ *
+ * Third-party libraries can both implement this listener and emit window events through
+ * [ReactContext.onExtraWindowCreate] and [ReactContext.onExtraWindowDestroy].
+ */
+public interface ExtraWindowEventListener {
+
+  /** Called when a new [Window] is created (e.g. a Dialog window for a Modal). */
+  public fun onExtraWindowCreate(window: Window)
+
+  /** Called when a [Window] is destroyed (e.g. on Dialog window dismiss). */
+  public fun onExtraWindowDestroy(window: Window)
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java

@@ -15,6 +15,7 @@
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.LayoutInflater;
+import android.view.Window;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import com.facebook.common.logging.FLog;
@@ -48,6 +49,8 @@ public interface RCTDeviceEventEmitter extends JavaScriptModule {
       new CopyOnWriteArraySet<>();
   private final CopyOnWriteArraySet<ActivityEventListener> mActivityEventListeners =
       new CopyOnWriteArraySet<>();
+  private final CopyOnWriteArraySet<ExtraWindowEventListener> mExtraWindowEventListeners =
+      new CopyOnWriteArraySet<>();
   private final CopyOnWriteArraySet<WindowFocusChangeListener> mWindowFocusEventListeners =
       new CopyOnWriteArraySet<>();
   private final ScrollEndedListeners mScrollEndedListeners = new ScrollEndedListeners();
@@ -246,6 +249,14 @@ public void removeActivityEventListener(ActivityEventListener listener) {
     mActivityEventListeners.remove(listener);
   }
 
+  public void addExtraWindowEventListener(ExtraWindowEventListener listener) {
+    mExtraWindowEventListeners.add(listener);
+  }
+
+  public void removeExtraWindowEventListener(ExtraWindowEventListener listener) {
+    mExtraWindowEventListeners.remove(listener);
+  }
+
   public void addWindowFocusChangeListener(WindowFocusChangeListener listener) {
     mWindowFocusEventListeners.add(listener);
   }
@@ -356,6 +367,30 @@ public void onActivityResult(
     }
   }
 
+  @ThreadConfined(UI)
+  public void onExtraWindowCreate(Window window) {
+    UiThreadUtil.assertOnUiThread();
+    for (ExtraWindowEventListener listener : mExtraWindowEventListeners) {
+      try {
+        listener.onExtraWindowCreate(window);
+      } catch (RuntimeException e) {
+        handleException(e);
+      }
+    }
+  }
+
+  @ThreadConfined(UI)
+  public void onExtraWindowDestroy(Window window) {
+    UiThreadUtil.assertOnUiThread();
+    for (ExtraWindowEventListener listener : mExtraWindowEventListeners) {
+      try {
+        listener.onExtraWindowDestroy(window);
+      } catch (RuntimeException e) {
+        handleException(e);
+      }
+    }
+  }
+
   @ThreadConfined(UI)
   public void onWindowFocusChange(boolean hasFocus) {
     UiThreadUtil.assertOnUiThread();

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

@@ -11,8 +11,10 @@ package com.facebook.react.uimanager
 
 import android.app.Activity
 import android.content.Context
+import android.view.Window
 import com.facebook.react.bridge.Callback
 import com.facebook.react.bridge.CatalystInstance
+import com.facebook.react.bridge.ExtraWindowEventListener
 import com.facebook.react.bridge.JavaScriptContextHolder
 import com.facebook.react.bridge.JavaScriptModule
 import com.facebook.react.bridge.LifecycleEventListener
@@ -67,6 +69,22 @@ public class ThemedReactContext(
     reactApplicationContext.removeLifecycleEventListener(listener)
   }
 
+  override fun addExtraWindowEventListener(listener: ExtraWindowEventListener) {
+    reactApplicationContext.addExtraWindowEventListener(listener)
+  }
+
+  override fun removeExtraWindowEventListener(listener: ExtraWindowEventListener) {
+    reactApplicationContext.removeExtraWindowEventListener(listener)
+  }
+
+  override fun onExtraWindowCreate(window: Window) {
+    reactApplicationContext.onExtraWindowCreate(window)
+  }
+
+  override fun onExtraWindowDestroy(window: Window) {
+    reactApplicationContext.onExtraWindowDestroy(window)
+  }
+
   override fun hasCurrentActivity(): Boolean = reactApplicationContext.hasCurrentActivity()
 
   override fun getCurrentActivity(): Activity? = reactApplicationContext.getCurrentActivity()

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/modal/ReactModalHostView.kt

@@ -196,6 +196,9 @@ public class ReactModalHostView(context: ThemedReactContext) :
     UiThreadUtil.assertOnUiThread()
 
     dialog?.let { nonNullDialog ->
+      nonNullDialog.window?.let { window ->
+        (context as ThemedReactContext).onExtraWindowDestroy(window)
+      }
       if (nonNullDialog.isShowing) {
         val dialogContext =
             ContextUtils.findContextOfType(nonNullDialog.context, Activity::class.java)
@@ -341,6 +344,7 @@ public class ReactModalHostView(context: ThemedReactContext) :
       newDialog.show()
       updateSystemAppearance()
       window.clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE)
+      (context as ThemedReactContext).onExtraWindowCreate(window)
     }
   }