Feat: Add navigationBarTranslucent modal prop

packages/react-native/Libraries/Modal/Modal.d.ts

@@ -101,6 +101,11 @@ export interface ModalPropsAndroid {
    *  Determines whether your modal should go under the system statusbar.
    */
   statusBarTranslucent?: boolean | undefined;
+
+  /**
+   *  Determines whether your modal should go under the system navigationbar.
+   */
+  navigationBarTranslucent?: boolean | undefined;
 }
 
 export type ModalProps = ModalBaseProps &

packages/react-native/Libraries/Modal/Modal.js

@@ -95,6 +95,14 @@ export type Props = $ReadOnly<{|
    */
   statusBarTranslucent?: ?boolean,
 
+  /**
+   * The `navigationBarTranslucent` prop determines whether your modal should go under
+   * the system navigationbar.
+   *
+   * See https://reactnative.dev/docs/modal.html#navigationbartranslucent-android
+   */
+  navigationBarTranslucent?: ?boolean,
+
   /**
    * The `hardwareAccelerated` prop controls whether to force hardware
    * acceleration for the underlying window.
@@ -301,6 +309,7 @@ class Modal extends React.Component<Props, State> {
         onDismiss={onDismiss}
         visible={this.props.visible}
         statusBarTranslucent={this.props.statusBarTranslucent}
+        navigationBarTranslucent={this.props.navigationBarTranslucent}
         identifier={this._identifier}
         style={styles.modal}
         // $FlowFixMe[method-unbinding] added when improving typing for this parameters

packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap

@@ -6411,6 +6411,7 @@ export type Props = $ReadOnly<{|
   ),
   transparent?: ?boolean,
   statusBarTranslucent?: ?boolean,
+  navigationBarTranslucent?: ?boolean,
   hardwareAccelerated?: ?boolean,
   visible?: ?boolean,
   onRequestClose?: ?DirectEventHandler<null>,

packages/react-native/React/Views/RCTModalHostView.h

@@ -27,6 +27,7 @@
 
 // Android only
 @property (nonatomic, assign) BOOL statusBarTranslucent;
+@property (nonatomic, assign) BOOL navigationBarTranslucent;
 @property (nonatomic, assign) BOOL hardwareAccelerated;
 @property (nonatomic, assign) BOOL animated;
 

packages/react-native/React/Views/RCTModalHostViewManager.m

@@ -111,6 +111,7 @@ - (void)invalidate
 RCT_EXPORT_VIEW_PROPERTY(presentationStyle, UIModalPresentationStyle)
 RCT_EXPORT_VIEW_PROPERTY(transparent, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(statusBarTranslucent, BOOL)
+RCT_EXPORT_VIEW_PROPERTY(navigationBarTranslucent, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(hardwareAccelerated, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(animated, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(onShow, RCTDirectEventBlock)

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

@@ -57,6 +57,14 @@ public class ReactModalHostManager :
     view.statusBarTranslucent = statusBarTranslucent
   }
 
+  @ReactProp(name = "navigationBarTranslucent")
+  public override fun setNavigationBarTranslucent(
+      view: ReactModalHostView,
+      navigationBarTranslucent: Boolean
+  ) {
+    view.navigationBarTranslucent = navigationBarTranslucent
+  }
+
   @ReactProp(name = "hardwareAccelerated")
   public override fun setHardwareAccelerated(
       view: ReactModalHostView,

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

@@ -48,6 +48,7 @@ import com.facebook.react.uimanager.events.EventDispatcher
 import com.facebook.react.views.common.ContextUtils
 import com.facebook.react.views.view.ReactViewGroup
 import com.facebook.react.views.view.setStatusBarTranslucency
+import com.facebook.react.views.view.setSystemBarsTranslucency
 import java.util.Objects
 
 /**
@@ -79,6 +80,12 @@ public class ReactModalHostView(context: ThemedReactContext) :
       createNewDialog = true
     }
 
+  public var navigationBarTranslucent: Boolean = false
+    set(value) {
+      field = value
+      createNewDialog = true
+    }
+
   public var animationType: String? = null
     set(value) {
       field = value
@@ -328,7 +335,12 @@ public class ReactModalHostView(context: ThemedReactContext) :
         }
       }
 
-      dialogWindow.setStatusBarTranslucency(statusBarTranslucent)
+      // Navigation bar cannot be translucent without status bar being translucent too
+      dialogWindow.setSystemBarsTranslucency(navigationBarTranslucent)
+
+      if (!navigationBarTranslucent) {
+        dialogWindow.setStatusBarTranslucency(statusBarTranslucent)
+      }
 
       if (transparent) {
         dialogWindow.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/view/WindowUtil.kt

@@ -7,10 +7,14 @@
 
 package com.facebook.react.views.view
 
+import android.content.res.Configuration
+import android.graphics.Color
 import android.os.Build
 import android.view.Window
 import android.view.WindowManager
 import androidx.core.view.ViewCompat
+import androidx.core.view.WindowCompat
+import androidx.core.view.WindowInsetsControllerCompat
 
 @Suppress("DEPRECATION")
 public fun Window.setStatusBarTranslucency(isTranslucent: Boolean) {
@@ -61,3 +65,39 @@ private fun Window.statusBarShow() {
   addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN)
   clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN)
 }
+
+@Suppress("DEPRECATION")
+public fun Window.setSystemBarsTranslucency(isTranslucent: Boolean) {
+  WindowCompat.setDecorFitsSystemWindows(this, !isTranslucent)
+
+  if (isTranslucent) {
+    val isDarkMode =
+      context.resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK ==
+        Configuration.UI_MODE_NIGHT_YES
+
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+      isStatusBarContrastEnforced = false
+      isNavigationBarContrastEnforced = true
+    }
+
+    statusBarColor = Color.TRANSPARENT
+    navigationBarColor = when {
+      Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q -> Color.TRANSPARENT
+      Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1 && !isDarkMode ->
+        Color.argb(0xe6, 0xFF, 0xFF, 0xFF)
+      else -> Color.argb(0x80, 0x1b, 0x1b, 0x1b)
+    }
+
+    WindowInsetsControllerCompat(this, this.decorView).run {
+      isAppearanceLightNavigationBars = !isDarkMode
+    }
+
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+      attributes.layoutInDisplayCutoutMode = when {
+        Build.VERSION.SDK_INT >= Build.VERSION_CODES.R ->
+          WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS
+        else -> WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
+      }
+    }
+  }
+}

packages/react-native/src/private/specs/components/RCTModalHostViewNativeComponent.js

@@ -58,6 +58,14 @@ type NativeProps = $ReadOnly<{|
    */
   statusBarTranslucent?: WithDefault<boolean, false>,
 
+  /**
+   * The `navigationBarTranslucent` prop determines whether your modal should go under
+   * the system navigationbar.
+   *
+   * See https://reactnative.dev/docs/modal#navigationBarTranslucent
+   */
+  navigationBarTranslucent?: WithDefault<boolean, false>,
+
   /**
    * The `hardwareAccelerated` prop controls whether to force hardware
    * acceleration for the underlying window.

packages/rn-tester/js/examples/Modal/ModalPresentation.js

@@ -19,7 +19,15 @@ import {RNTesterThemeContext} from '../../components/RNTesterTheme';
 import RNTOption from '../../components/RNTOption';
 import * as React from 'react';
 import {useCallback, useContext, useState} from 'react';
-import {Modal, Platform, StyleSheet, Switch, Text, View} from 'react-native';
+import {
+  Modal,
+  Platform,
+  StatusBar,
+  StyleSheet,
+  Switch,
+  Text,
+  View,
+} from 'react-native';
 
 const animationTypes = ['slide', 'none', 'fade'];
 const presentationStyles = [
@@ -56,6 +64,7 @@ function ModalPresentation() {
     transparent: false,
     hardwareAccelerated: false,
     statusBarTranslucent: false,
+    navigationBarTranslucent: false,
     presentationStyle: Platform.select({
       ios: 'fullScreen',
       default: undefined,
@@ -72,6 +81,7 @@ function ModalPresentation() {
   const presentationStyle = props.presentationStyle;
   const hardwareAccelerated = props.hardwareAccelerated;
   const statusBarTranslucent = props.statusBarTranslucent;
+  const navigationBarTranslucent = props.navigationBarTranslucent;
   const backdropColor = props.backdropColor;
   const backgroundColor = useContext(RNTesterThemeContext).BackgroundColor;
 
@@ -92,10 +102,29 @@ function ModalPresentation() {
         <Switch
           value={statusBarTranslucent}
           onValueChange={enabled =>
-            setProps(prev => ({...prev, statusBarTranslucent: enabled}))
+            setProps(prev => ({
+              ...prev,
+              statusBarTranslucent: enabled,
+              navigationBarTranslucent: false,
+            }))
           }
         />
       </View>
+      <View style={styles.inlineBlock}>
+        <RNTesterText style={styles.title}>
+          Navigation Bar Translucent 🟢
+        </RNTesterText>
+        <Switch
+          value={navigationBarTranslucent}
+          onValueChange={enabled => {
+            setProps(prev => ({
+              ...prev,
+              statusBarTranslucent: enabled,
+              navigationBarTranslucent: enabled,
+            }));
+          }}
+        />
+      </View>
       <View style={styles.inlineBlock}>
         <RNTesterText style={styles.title}>
           Hardware Acceleration 🟢

packages/rn-tester/js/examples/ScrollView/ScrollViewIndicatorInsetsIOSExample.js

@@ -32,6 +32,7 @@ export function ScrollViewIndicatorInsetsExample() {
           onRequestClose={() => setModalVisible(false)}
           presentationStyle="fullScreen"
           statusBarTranslucent={false}
+          navigationBarTranslucent={false}
           supportedOrientations={['portrait', 'landscape']}>
           <View style={styles.modal}>
             <ScrollView