packages/flutter/lib/src/widgets/media_query.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:math' as math;
import 'dart:ui' as ui;

import 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart';

import 'basic.dart';
import 'binding.dart';
import 'debug.dart';
import 'framework.dart';
import 'inherited_model.dart';

// Examples can assume:
// late BuildContext context;

/// Whether in portrait or landscape.
enum Orientation {
  /// Taller than wide.
  portrait,

  /// Wider than tall.
  landscape
}

/// Specifies a part of MediaQueryData to depend on.
///
/// [MediaQuery] contains a large number of related properties. Widgets frequently
/// depend on only a few of these attributes. For example, a widget that needs to
/// rebuild when the [MediaQueryData.textScaler] changes does not need to be
/// notified when the [MediaQueryData.size] changes. Specifying an aspect avoids
/// unnecessary rebuilds.
enum _MediaQueryAspect {
  /// Specifies the aspect corresponding to [MediaQueryData.size].
  size,
  /// Specifies the aspect corresponding to [MediaQueryData.orientation].
  orientation,
  /// Specifies the aspect corresponding to [MediaQueryData.devicePixelRatio].
  devicePixelRatio,
  /// Specifies the aspect corresponding to [MediaQueryData.textScaleFactor].
  textScaleFactor,
  /// Specifies the aspect corresponding to [MediaQueryData.textScaler].
  textScaler,
  /// Specifies the aspect corresponding to [MediaQueryData.platformBrightness].
  platformBrightness,
  /// Specifies the aspect corresponding to [MediaQueryData.padding].
  padding,
  /// Specifies the aspect corresponding to [MediaQueryData.viewInsets].
  viewInsets,
  /// Specifies the aspect corresponding to [MediaQueryData.systemGestureInsets].
  systemGestureInsets,
  /// Specifies the aspect corresponding to [MediaQueryData.viewPadding].
  viewPadding,
  /// Specifies the aspect corresponding to [MediaQueryData.alwaysUse24HourFormat].
  alwaysUse24HourFormat,
  /// Specifies the aspect corresponding to [MediaQueryData.accessibleNavigation].
  accessibleNavigation,
  /// Specifies the aspect corresponding to [MediaQueryData.invertColors].
  invertColors,
  /// Specifies the aspect corresponding to [MediaQueryData.highContrast].
  highContrast,
  /// Specifies the aspect corresponding to [MediaQueryData.onOffSwitchLabels].
  onOffSwitchLabels,
  /// Specifies the aspect corresponding to [MediaQueryData.disableAnimations].
  disableAnimations,
  /// Specifies the aspect corresponding to [MediaQueryData.boldText].
  boldText,
  /// Specifies the aspect corresponding to [MediaQueryData.navigationMode].
  navigationMode,
  /// Specifies the aspect corresponding to [MediaQueryData.gestureSettings].
  gestureSettings,
  /// Specifies the aspect corresponding to [MediaQueryData.displayFeatures].
  displayFeatures,
}

/// Information about a piece of media (e.g., a window).
///
/// For example, the [MediaQueryData.size] property contains the width and
/// height of the current window.
///
/// To obtain the current [MediaQueryData] for a given [BuildContext], use the
/// [MediaQuery.of] function. For example, to obtain the size of the current
/// window, use `MediaQuery.of(context).size`.
///
/// If no [MediaQuery] is in scope then the [MediaQuery.of] method will throw an
/// exception. Alternatively, [MediaQuery.maybeOf] may be used, which returns
/// null instead of throwing if no [MediaQuery] is in scope.
///
/// ## Insets and Padding
///
/// ![A diagram of padding, viewInsets, and viewPadding in correlation with each
/// other](https://flutter.github.io/assets-for-api-docs/assets/widgets/media_query.png)
///
/// This diagram illustrates how [padding] relates to [viewPadding] and
/// [viewInsets], shown here in its simplest configuration, as the difference
/// between the two. In cases when the viewInsets exceed the viewPadding, like
/// when a software keyboard is shown below, padding goes to zero rather than a
/// negative value. Therefore, padding is calculated by taking
/// `max(0.0, viewPadding - viewInsets)`.
///
/// {@animation 300 300 https://flutter.github.io/assets-for-api-docs/assets/widgets/window_padding.mp4}
///
/// In this diagram, the black areas represent system UI that the app cannot
/// draw over. The red area represents view padding that the application may not
/// be able to detect gestures in and may not want to draw in. The grey area
/// represents the system keyboard, which can cover over the bottom view padding
/// when visible.
///
/// MediaQueryData includes three [EdgeInsets] values:
/// [padding], [viewPadding], and [viewInsets]. These values reflect the
/// configuration of the device and are used and optionally consumed by widgets
/// that position content within these insets. The padding value defines areas
/// that might not be completely visible, like the display "notch" on the iPhone
/// X. The viewInsets value defines areas that aren't visible at all, typically
/// because they're obscured by the device's keyboard. Similar to viewInsets,
/// viewPadding does not differentiate padding in areas that may be obscured.
/// For example, by using the viewPadding property, padding would defer to the
/// iPhone "safe area" regardless of whether a keyboard is showing.
///
/// {@youtube 560 315 https://www.youtube.com/watch?v=ceCo8U0XHqw}
///
/// The viewInsets and viewPadding are independent values, they're
/// measured from the edges of the MediaQuery widget's bounds. Together they
/// inform the [padding] property. The bounds of the top level MediaQuery
/// created by [WidgetsApp] are the same as the window that contains the app.
///
/// Widgets whose layouts consume space defined by [viewInsets], [viewPadding],
/// or [padding] should enclose their children in secondary MediaQuery
/// widgets that reduce those properties by the same amount.
/// The [removePadding], [removeViewPadding], and [removeViewInsets] methods are
/// useful for this.
///
/// See also:
///
///  * [Scaffold], [SafeArea], [CupertinoTabScaffold], and
///    [CupertinoPageScaffold], all of which are informed by [padding],
///    [viewPadding], and [viewInsets].
@immutable
class MediaQueryData {
  /// Creates data for a media query with explicit values.
  ///
  /// In a typical application, calling this constructor directly is rarely
  /// needed. Consider using [MediaQueryData.fromView] to create data based on a
  /// [dart:ui.FlutterView], or [MediaQueryData.copyWith] to create a new copy
  /// of [MediaQueryData] with updated properties from a base [MediaQueryData].
  const MediaQueryData({
    this.size = Size.zero,
    this.devicePixelRatio = 1.0,
    @Deprecated(
      'Use textScaler instead. '
      'Use of textScaleFactor was deprecated in preparation for the upcoming nonlinear text scaling support. '
      'This feature was deprecated after v3.12.0-2.0.pre.',
    )
    double textScaleFactor = 1.0,
    TextScaler textScaler = _kUnspecifiedTextScaler,
    this.platformBrightness = Brightness.light,
    this.padding = EdgeInsets.zero,
    this.viewInsets = EdgeInsets.zero,
    this.systemGestureInsets = EdgeInsets.zero,
    this.viewPadding = EdgeInsets.zero,
    this.alwaysUse24HourFormat = false,
    this.accessibleNavigation = false,
    this.invertColors = false,
    this.highContrast = false,
    this.onOffSwitchLabels = false,
    this.disableAnimations = false,
    this.boldText = false,
    this.navigationMode = NavigationMode.traditional,
    this.gestureSettings = const DeviceGestureSettings(touchSlop: kTouchSlop),
    this.displayFeatures = const <ui.DisplayFeature>[],
  }) : _textScaleFactor = textScaleFactor,
       _textScaler = textScaler,
       assert(
         identical(textScaler, _kUnspecifiedTextScaler) || textScaleFactor == 1.0,
         'textScaleFactor is deprecated and cannot be specified when textScaler is specified.',
       );

  /// Deprecated. Use [MediaQueryData.fromView] instead.
  ///
  /// This constructor was operating on a single window assumption. In
  /// preparation for Flutter's upcoming multi-window support, it has been
  /// deprecated.
  @Deprecated(
    'Use MediaQueryData.fromView instead. '
    'This constructor was deprecated in preparation for the upcoming multi-window support. '
    'This feature was deprecated after v3.7.0-32.0.pre.'
  )
  factory MediaQueryData.fromWindow(ui.FlutterView window) => MediaQueryData.fromView(window);

  /// Creates data for a [MediaQuery] based on the given `view`.
  ///
  /// If provided, the `platformData` is used to fill in the platform-specific
  /// aspects of the newly created [MediaQueryData]. If `platformData` is null,
  /// the `view`'s [PlatformDispatcher] is consulted to construct the
  /// platform-specific data.
  ///
  /// Data which is exposed directly on the [FlutterView] is considered
  /// view-specific. Data which is only exposed via the
  /// [FlutterView.platformDispatcher] property is considered platform-specific.
  ///
  /// Callers of this method should ensure that they also register for
  /// notifications so that the [MediaQueryData] can be updated when any data
  /// used to construct it changes. Notifications to consider are:
  ///
  ///  * [WidgetsBindingObserver.didChangeMetrics] or
  ///    [dart:ui.PlatformDispatcher.onMetricsChanged],
  ///  * [WidgetsBindingObserver.didChangeAccessibilityFeatures] or
  ///    [dart:ui.PlatformDispatcher.onAccessibilityFeaturesChanged],
  ///  * [WidgetsBindingObserver.didChangeTextScaleFactor] or
  ///    [dart:ui.PlatformDispatcher.onTextScaleFactorChanged],
  ///  * [WidgetsBindingObserver.didChangePlatformBrightness] or
  ///    [dart:ui.PlatformDispatcher.onPlatformBrightnessChanged].
  ///
  /// The last three notifications are only relevant if no `platformData` is
  /// provided. If `platformData` is provided, callers should ensure to call
  /// this method again when it changes to keep the constructed [MediaQueryData]
  /// updated.
  ///
  /// In general, [MediaQuery.of] is the appropriate way to obtain
  /// [MediaQueryData] from a widget. This `fromView` constructor is primarily
  /// for use in the implementation of the framework itself.
  ///
  /// See also:
  ///
  ///  * [MediaQuery.fromView], which constructs [MediaQueryData] from a provided
  ///    [FlutterView], makes it available to descendant widgets, and sets up
  ///    the appropriate notification listeners to keep the data updated.
  MediaQueryData.fromView(ui.FlutterView view, {MediaQueryData? platformData})
    : size = view.physicalSize / view.devicePixelRatio,
      devicePixelRatio = view.devicePixelRatio,
      _textScaleFactor = 1.0, // _textScaler is the source of truth.
      _textScaler = _textScalerFromView(view, platformData),
      platformBrightness = platformData?.platformBrightness ?? view.platformDispatcher.platformBrightness,
      padding = EdgeInsets.fromViewPadding(view.padding, view.devicePixelRatio),
      viewPadding = EdgeInsets.fromViewPadding(view.viewPadding, view.devicePixelRatio),
      viewInsets = EdgeInsets.fromViewPadding(view.viewInsets, view.devicePixelRatio),
      systemGestureInsets = EdgeInsets.fromViewPadding(view.systemGestureInsets, view.devicePixelRatio),
      accessibleNavigation = platformData?.accessibleNavigation ?? view.platformDispatcher.accessibilityFeatures.accessibleNavigation,
      invertColors = platformData?.invertColors ?? view.platformDispatcher.accessibilityFeatures.invertColors,
      disableAnimations = platformData?.disableAnimations ?? view.platformDispatcher.accessibilityFeatures.disableAnimations,
      boldText = platformData?.boldText ?? view.platformDispatcher.accessibilityFeatures.boldText,
      highContrast = platformData?.highContrast ?? view.platformDispatcher.accessibilityFeatures.highContrast,
      onOffSwitchLabels = platformData?.onOffSwitchLabels ?? view.platformDispatcher.accessibilityFeatures.onOffSwitchLabels,
      alwaysUse24HourFormat = platformData?.alwaysUse24HourFormat ?? view.platformDispatcher.alwaysUse24HourFormat,
      navigationMode = platformData?.navigationMode ?? NavigationMode.traditional,
      gestureSettings = DeviceGestureSettings.fromView(view),
      displayFeatures = view.displayFeatures;

  static TextScaler _textScalerFromView(ui.FlutterView view, MediaQueryData? platformData) {
    final double scaleFactor = platformData?.textScaleFactor ?? view.platformDispatcher.textScaleFactor;
    return scaleFactor == 1.0 ? TextScaler.noScaling : TextScaler.linear(scaleFactor);
  }

  /// The size of the media in logical pixels (e.g, the size of the screen).
  ///
  /// Logical pixels are roughly the same visual size across devices. Physical
  /// pixels are the size of the actual hardware pixels on the device. The
  /// number of physical pixels per logical pixel is described by the
  /// [devicePixelRatio].
  ///
  /// ## Troubleshooting
  ///
  /// It is considered bad practice to cache and later use the size returned
  /// by `MediaQuery.of(context).size`. It will make the application non responsive
  /// and might lead to unexpected behaviors.
  ///
  /// For instance, during startup, especially in release mode, the first
  /// returned size might be (0,0). The size will be updated when the native
  /// platform reports the actual resolution. Using [MediaQuery.of] will ensure
  /// that when the size changes, any widgets depending on the size are
  /// automatically rebuilt.
  ///
  /// See the article on [Creating responsive and adaptive
  /// apps](https://docs.flutter.dev/development/ui/layout/adaptive-responsive)
  /// for an introduction.
  ///
  /// See also:
  ///
  ///  * [FlutterView.physicalSize], which returns the size in physical pixels.
  ///  * [MediaQuery.sizeOf], a method to find and depend on the size defined
  ///    for a [BuildContext].
  final Size size;

  /// The number of device pixels for each logical pixel. This number might not
  /// be a power of two. Indeed, it might not even be an integer. For example,
  /// the Nexus 6 has a device pixel ratio of 3.5.
  final double devicePixelRatio;

  /// Deprecated. Will be removed in a future version of Flutter. Use
  /// [textScaler] instead.
  ///
  /// The number of font pixels for each logical pixel.
  ///
  /// For example, if the text scale factor is 1.5, text will be 50% larger than
  /// the specified font size.
  ///
  /// See also:
  ///
  ///  * [MediaQuery.textScaleFactorOf], a method to find and depend on the
  ///    textScaleFactor defined for a [BuildContext].
  @Deprecated(
    'Use textScaler instead. '
    'Use of textScaleFactor was deprecated in preparation for the upcoming nonlinear text scaling support. '
    'This feature was deprecated after v3.12.0-2.0.pre.',
  )
  double get textScaleFactor => textScaler.textScaleFactor;
  // TODO(LongCatIsLooong): remove this after textScaleFactor is removed. To
  // maintain backward compatibility and also keep the const constructor this
  // has to be kept as a private field.
  // https://github.com/flutter/flutter/issues/128825
  final double _textScaleFactor;

  /// The font scaling strategy to use for laying out textual contents.
  ///
  /// If this [MediaQueryData] is created by the [MediaQueryData.fromView]
  /// constructor, this property reflects the platform's preferred text scaling
  /// strategy, and may change as the user changes the scaling factor in the
  /// operating system's accessibility settings.
  ///
  /// See also:
  ///
  ///  * [MediaQuery.textScalerOf], a method to find and depend on the
  ///    [textScaler] defined for a [BuildContext].
  ///  * [TextPainter], a class that lays out and paints text.
  TextScaler get textScaler {
    // The constructor was called with an explicitly specified textScaler value,
    // we assume the caller is migrated and ignore _textScaleFactor.
    if (!identical(_kUnspecifiedTextScaler, _textScaler)) {
      return _textScaler;
    }
    return _textScaleFactor == 1.0
      // textScaleFactor and textScaler from the constructor are consistent.
      ? TextScaler.noScaling
      // The constructor was called with an explicitly specified textScaleFactor,
      // we assume the caller is unmigrated and ignore _textScaler.
      : TextScaler.linear(_textScaleFactor);
  }
  final TextScaler _textScaler;

  /// The current brightness mode of the host platform.
  ///
  /// For example, starting in Android Pie, battery saver mode asks all apps to
  /// render in a "dark mode".
  ///
  /// Not all platforms necessarily support a concept of brightness mode. Those
  /// platforms will report [Brightness.light] in this property.
  ///
  /// See also:
  ///
  ///  * [MediaQuery.platformBrightnessOf], a method to find and depend on the
  ///    platformBrightness defined for a [BuildContext].
  final Brightness platformBrightness;

  /// The parts of the display that are completely obscured by system UI,
  /// typically by the device's keyboard.
  ///
  /// When a mobile device's keyboard is visible `viewInsets.bottom`
  /// corresponds to the top of the keyboard.
  ///
  /// This value is independent of the [padding] and [viewPadding]. viewPadding
  /// is measured from the edges of the [MediaQuery] widget's bounds. Padding is
  /// calculated based on the viewPadding and viewInsets. The bounds of the top
  /// level MediaQuery created by [WidgetsApp] are the same as the window
  /// (often the mobile device screen) that contains the app.
  ///
  /// {@youtube 560 315 https://www.youtube.com/watch?v=ceCo8U0XHqw}
  ///
  /// See also:
  ///
  ///  * [FlutterView], which provides some additional detail about this property
  ///    and how it relates to [padding] and [viewPadding].
  final EdgeInsets viewInsets;

  /// The parts of the display that are partially obscured by system UI,
  /// typically by the hardware display "notches" or the system status bar.
  ///
  /// If you consumed this padding (e.g. by building a widget that envelops or
  /// accounts for this padding in its layout in such a way that children are
  /// no longer exposed to this padding), you should remove this padding
  /// for subsequent descendants in the widget tree by inserting a new
  /// [MediaQuery] widget using the [MediaQuery.removePadding] factory.
  ///
  /// Padding is derived from the values of [viewInsets] and [viewPadding].
  ///
  /// {@youtube 560 315 https://www.youtube.com/watch?v=ceCo8U0XHqw}
  ///
  /// See also:
  ///
  ///  * [FlutterView], which provides some additional detail about this
  ///    property and how it relates to [viewInsets] and [viewPadding].
  ///  * [SafeArea], a widget that consumes this padding with a [Padding] widget
  ///    and automatically removes it from the [MediaQuery] for its child.
  final EdgeInsets padding;

  /// The parts of the display that are partially obscured by system UI,
  /// typically by the hardware display "notches" or the system status bar.
  ///
  /// This value remains the same regardless of whether the system is reporting
  /// other obstructions in the same physical area of the screen. For example, a
  /// software keyboard on the bottom of the screen that may cover and consume
  /// the same area that requires bottom padding will not affect this value.
  ///
  /// This value is independent of the [padding] and [viewInsets]: their values
  /// are measured from the edges of the [MediaQuery] widget's bounds. The
  /// bounds of the top level MediaQuery created by [WidgetsApp] are the
  /// same as the window that contains the app. On mobile devices, this will
  /// typically be the full screen.
  ///
  /// {@youtube 560 315 https://www.youtube.com/watch?v=ceCo8U0XHqw}
  ///
  /// See also:
  ///
  ///  * [FlutterView], which provides some additional detail about this
  ///    property and how it relates to [padding] and [viewInsets].
  final EdgeInsets viewPadding;

  /// The areas along the edges of the display where the system consumes
  /// certain input events and blocks delivery of those events to the app.
  ///
  /// Starting with Android Q, simple swipe gestures that start within the
  /// [systemGestureInsets] areas are used by the system for page navigation
  /// and may not be delivered to the app. Taps and swipe gestures that begin
  /// with a long-press are delivered to the app, but simple press-drag-release
  /// swipe gestures which begin within the area defined by [systemGestureInsets]
  /// may not be.
  ///
  /// Apps should avoid locating gesture detectors within the system gesture
  /// insets area. Apps should feel free to put visual elements within
  /// this area.
  ///
  /// This property is currently only expected to be set to a non-default value
  /// on Android starting with version Q.
  ///
  /// {@tool dartpad}
  /// For apps that might be deployed on Android Q devices with full gesture
  /// navigation enabled, use [systemGestureInsets] with [Padding]
  /// to avoid having the left and right edges of the [Slider] from appearing
  /// within the area reserved for system gesture navigation.
  ///
  /// By default, [Slider]s expand to fill the available width. So, we pad the
  /// left and right sides.
  ///
  /// ** See code in examples/api/lib/widgets/media_query/media_query_data.system_gesture_insets.0.dart **
  /// {@end-tool}
  final EdgeInsets systemGestureInsets;

  /// Whether to use 24-hour format when formatting time.
  ///
  /// The behavior of this flag is different across platforms:
  ///
  /// - On Android this flag is reported directly from the user settings called
  ///   "Use 24-hour format". It applies to any locale used by the application,
  ///   whether it is the system-wide locale, or the custom locale set by the
  ///   application.
  /// - On iOS this flag is set to true when the user setting called "24-Hour
  ///   Time" is set or the system-wide locale's default uses 24-hour
  ///   formatting.
  final bool alwaysUse24HourFormat;

  /// Whether the user is using an accessibility service like TalkBack or
  /// VoiceOver to interact with the application.
  ///
  /// When this setting is true, features such as timeouts should be disabled or
  /// have minimum durations increased.
  ///
  /// See also:
  ///
  ///  * [dart:ui.PlatformDispatcher.accessibilityFeatures], where the setting originates.
  final bool accessibleNavigation;

  /// Whether the device is inverting the colors of the platform.
  ///
  /// This flag is currently only updated on iOS devices.
  ///
  /// See also:
  ///
  ///  * [dart:ui.PlatformDispatcher.accessibilityFeatures], where the setting
  ///    originates.
  final bool invertColors;

  /// Whether the user requested a high contrast between foreground and background
  /// content on iOS, via Settings -> Accessibility -> Increase Contrast.
  ///
  /// This flag is currently only updated on iOS devices that are running iOS 13
  /// or above.
  final bool highContrast;

  /// Whether the user requested to show on/off labels inside switches on iOS,
  /// via Settings -> Accessibility -> Display & Text Size -> On/Off Labels.
  ///
  /// See also:
  ///
  ///  * [dart:ui.PlatformDispatcher.accessibilityFeatures], where the setting
  ///    originates.
  final bool onOffSwitchLabels;

  /// Whether the platform is requesting that animations be disabled or reduced
  /// as much as possible.
  ///
  /// See also:
  ///
  ///  * [dart:ui.PlatformDispatcher.accessibilityFeatures], where the setting
  ///    originates.
  final bool disableAnimations;

  /// Whether the platform is requesting that text be drawn with a bold font
  /// weight.
  ///
  /// See also:
  ///
  ///  * [dart:ui.PlatformDispatcher.accessibilityFeatures], where the setting
  ///    originates.
  final bool boldText;

  /// Describes the navigation mode requested by the platform.
  ///
  /// Some user interfaces are better navigated using a directional pad (DPAD)
  /// or arrow keys, and for those interfaces, some widgets need to handle these
  /// directional events differently. In order to know when to do that, these
  /// widgets will look for the navigation mode in effect for their context.
  ///
  /// For instance, in a television interface, [NavigationMode.directional]
  /// should be set, so that directional navigation is used to navigate away
  /// from a text field using the DPAD. In contrast, on a regular desktop
  /// application with the [navigationMode] set to [NavigationMode.traditional],
  /// the arrow keys are used to move the cursor instead of navigating away.
  ///
  /// The [NavigationMode] values indicate the type of navigation to be used in
  /// a widget subtree for those widgets sensitive to it.
  final NavigationMode navigationMode;

  /// The gesture settings for the view this media query is derived from.
  ///
  /// This contains platform specific configuration for gesture behavior,
  /// such as touch slop. These settings should be favored for configuring
  /// gesture behavior over the framework constants.
  final DeviceGestureSettings gestureSettings;

  /// {@macro dart.ui.ViewConfiguration.displayFeatures}
  ///
  /// See also:
  ///
  ///  * [dart:ui.DisplayFeatureType], which lists the different types of
  ///  display features and explains the differences between them.
  ///  * [dart:ui.DisplayFeatureState], which lists the possible states for
  ///  folding features ([dart:ui.DisplayFeatureType.fold] and
  ///  [dart:ui.DisplayFeatureType.hinge]).
  final List<ui.DisplayFeature> displayFeatures;

  /// The orientation of the media (e.g., whether the device is in landscape or
  /// portrait mode).
  Orientation get orientation {
    return size.width > size.height ? Orientation.landscape : Orientation.portrait;
  }

  /// Creates a copy of this media query data but with the given fields replaced
  /// with the new values.
  ///
  /// The `textScaler` parameter and `textScaleFactor` parameter must not be
  /// both specified.
  MediaQueryData copyWith({
    Size? size,
    double? devicePixelRatio,
    @Deprecated(
      'Use textScaler instead. '
      'Use of textScaleFactor was deprecated in preparation for the upcoming nonlinear text scaling support. '
      'This feature was deprecated after v3.12.0-2.0.pre.',
    )
    double? textScaleFactor,
    TextScaler? textScaler,
    Brightness? platformBrightness,
    EdgeInsets? padding,
    EdgeInsets? viewPadding,
    EdgeInsets? viewInsets,
    EdgeInsets? systemGestureInsets,
    bool? alwaysUse24HourFormat,
    bool? highContrast,
    bool? onOffSwitchLabels,
    bool? disableAnimations,
    bool? invertColors,
    bool? accessibleNavigation,
    bool? boldText,
    NavigationMode? navigationMode,
    DeviceGestureSettings? gestureSettings,
    List<ui.DisplayFeature>? displayFeatures,
  }) {
    assert(textScaleFactor == null || textScaler == null);
    if (textScaleFactor != null) {
      textScaler ??= TextScaler.linear(textScaleFactor);
    }
    return MediaQueryData(
      size: size ?? this.size,
      devicePixelRatio: devicePixelRatio ?? this.devicePixelRatio,
      textScaler: textScaler ?? this.textScaler,
      platformBrightness: platformBrightness ?? this.platformBrightness,
      padding: padding ?? this.padding,
      viewPadding: viewPadding ?? this.viewPadding,
      viewInsets: viewInsets ?? this.viewInsets,
      systemGestureInsets: systemGestureInsets ?? this.systemGestureInsets,
      alwaysUse24HourFormat: alwaysUse24HourFormat ?? this.alwaysUse24HourFormat,
      invertColors: invertColors ?? this.invertColors,
      highContrast: highContrast ?? this.highContrast,
      onOffSwitchLabels: onOffSwitchLabels ?? this.onOffSwitchLabels,
      disableAnimations: disableAnimations ?? this.disableAnimations,
      accessibleNavigation: accessibleNavigation ?? this.accessibleNavigation,
      boldText: boldText ?? this.boldText,
      navigationMode: navigationMode ?? this.navigationMode,
      gestureSettings: gestureSettings ?? this.gestureSettings,
      displayFeatures: displayFeatures ?? this.displayFeatures,
    );
  }

  /// Creates a copy of this media query data but with the given [padding]s
  /// replaced with zero.
  ///
  /// The `removeLeft`, `removeTop`, `removeRight`, and `removeBottom` arguments
  /// must not be null. If all four are false (the default) then this
  /// [MediaQueryData] is returned unmodified.
  ///
  /// See also:
  ///
  ///  * [MediaQuery.removePadding], which uses this method to remove [padding]
  ///    from the ambient [MediaQuery].
  ///  * [SafeArea], which both removes the padding from the [MediaQuery] and
  ///    adds a [Padding] widget.
  ///  * [removeViewInsets], the same thing but for [viewInsets].
  ///  * [removeViewPadding], the same thing but for [viewPadding].
  MediaQueryData removePadding({
    bool removeLeft = false,
    bool removeTop = false,
    bool removeRight = false,
    bool removeBottom = false,
  }) {
    if (!(removeLeft || removeTop || removeRight || removeBottom)) {
      return this;
    }
    return copyWith(
      padding: padding.copyWith(
        left: removeLeft ? 0.0 : null,
        top: removeTop ? 0.0 : null,
        right: removeRight ? 0.0 : null,
        bottom: removeBottom ? 0.0 : null,
      ),
      viewPadding: viewPadding.copyWith(
        left: removeLeft ? math.max(0.0, viewPadding.left - padding.left) : null,
        top: removeTop ? math.max(0.0, viewPadding.top - padding.top) : null,
        right: removeRight ? math.max(0.0, viewPadding.right - padding.right) : null,
        bottom: removeBottom ? math.max(0.0, viewPadding.bottom - padding.bottom) : null,
      ),
    );
  }

  /// Creates a copy of this media query data but with the given [viewInsets]
  /// replaced with zero.
  ///
  /// The `removeLeft`, `removeTop`, `removeRight`, and `removeBottom` arguments
  /// must not be null. If all four are false (the default) then this
  /// [MediaQueryData] is returned unmodified.
  ///
  /// See also:
  ///
  ///  * [MediaQuery.removeViewInsets], which uses this method to remove
  ///    [viewInsets] from the ambient [MediaQuery].
  ///  * [removePadding], the same thing but for [padding].
  ///  * [removeViewPadding], the same thing but for [viewPadding].
  MediaQueryData removeViewInsets({
    bool removeLeft = false,
    bool removeTop = false,
    bool removeRight = false,
    bool removeBottom = false,
  }) {
    if (!(removeLeft || removeTop || removeRight || removeBottom)) {
      return this;
    }
    return copyWith(
      viewPadding: viewPadding.copyWith(
        left: removeLeft ? math.max(0.0, viewPadding.left - viewInsets.left) : null,
        top: removeTop ? math.max(0.0, viewPadding.top - viewInsets.top) : null,
        right: removeRight ? math.max(0.0, viewPadding.right - viewInsets.right) : null,
        bottom: removeBottom ? math.max(0.0, viewPadding.bottom - viewInsets.bottom) : null,
      ),
      viewInsets: viewInsets.copyWith(
        left: removeLeft ? 0.0 : null,
        top: removeTop ? 0.0 : null,
        right: removeRight ? 0.0 : null,
        bottom: removeBottom ? 0.0 : null,
      ),
    );
  }

  /// Creates a copy of this media query data but with the given [viewPadding]
  /// replaced with zero.
  ///
  /// The `removeLeft`, `removeTop`, `removeRight`, and `removeBottom` arguments
  /// must not be null. If all four are false (the default) then this
  /// [MediaQueryData] is returned unmodified.
  ///
  /// See also:
  ///
  ///  * [MediaQuery.removeViewPadding], which uses this method to remove
  ///    [viewPadding] from the ambient [MediaQuery].
  ///  * [removePadding], the same thing but for [padding].
  ///  * [removeViewInsets], the same thing but for [viewInsets].
  MediaQueryData removeViewPadding({
    bool removeLeft = false,
    bool removeTop = false,
    bool removeRight = false,
    bool removeBottom = false,
  }) {
    if (!(removeLeft || removeTop || removeRight || removeBottom)) {
      return this;
    }
    return copyWith(
      padding: padding.copyWith(
        left: removeLeft ? 0.0 : null,
        top: removeTop ? 0.0 : null,
        right: removeRight ? 0.0 : null,
        bottom: removeBottom ? 0.0 : null,
      ),
      viewPadding: viewPadding.copyWith(
        left: removeLeft ? 0.0 : null,
        top: removeTop ? 0.0 : null,
        right: removeRight ? 0.0 : null,
        bottom: removeBottom ? 0.0 : null,
      ),
    );
  }

  /// Creates a copy of this media query data by removing [displayFeatures] that
  /// are completely outside the given sub-screen and adjusting the [padding],
  /// [viewInsets] and [viewPadding] to be zero on the sides that are not
  /// included in the sub-screen.
  ///
  /// Returns unmodified [MediaQueryData] if the sub-screen coincides with the
  /// available screen space.
  ///
  /// Asserts in debug mode, if the given sub-screen is outside the available
  /// screen space.
  ///
  /// See also:
  ///
  ///  * [DisplayFeatureSubScreen], which removes the display features that
  ///    split the screen, from the [MediaQuery] and adds a [Padding] widget to
  ///    position the child to match the selected sub-screen.
  MediaQueryData removeDisplayFeatures(Rect subScreen) {
    assert(subScreen.left >= 0.0 && subScreen.top >= 0.0 &&
        subScreen.right <= size.width && subScreen.bottom <= size.height,
        "'subScreen' argument cannot be outside the bounds of the screen");
    if (subScreen.size == size && subScreen.topLeft == Offset.zero) {
      return this;
    }
    final double rightInset = size.width - subScreen.right;
    final double bottomInset = size.height - subScreen.bottom;
    return copyWith(
      padding: EdgeInsets.only(
        left: math.max(0.0, padding.left - subScreen.left),
        top: math.max(0.0, padding.top - subScreen.top),
        right: math.max(0.0, padding.right - rightInset),
        bottom: math.max(0.0, padding.bottom - bottomInset),
      ),
      viewPadding: EdgeInsets.only(
        left: math.max(0.0, viewPadding.left - subScreen.left),
        top: math.max(0.0, viewPadding.top - subScreen.top),
        right: math.max(0.0, viewPadding.right - rightInset),
        bottom: math.max(0.0, viewPadding.bottom - bottomInset),
      ),
      viewInsets: EdgeInsets.only(
        left: math.max(0.0, viewInsets.left - subScreen.left),
        top: math.max(0.0, viewInsets.top - subScreen.top),
        right: math.max(0.0, viewInsets.right - rightInset),
        bottom: math.max(0.0, viewInsets.bottom - bottomInset),
      ),
      displayFeatures: displayFeatures.where(
        (ui.DisplayFeature displayFeature) => subScreen.overlaps(displayFeature.bounds)
      ).toList(),
    );
  }

  @override
  bool operator ==(Object other) {
    if (other.runtimeType != runtimeType) {
      return false;
    }
    return other is MediaQueryData
        && other.size == size
        && other.devicePixelRatio == devicePixelRatio
        && other.textScaleFactor == textScaleFactor
        && other.platformBrightness == platformBrightness
        && other.padding == padding
        && other.viewPadding == viewPadding
        && other.viewInsets == viewInsets
        && other.systemGestureInsets == systemGestureInsets
        && other.alwaysUse24HourFormat == alwaysUse24HourFormat
        && other.highContrast == highContrast
        && other.onOffSwitchLabels == onOffSwitchLabels
        && other.disableAnimations == disableAnimations
        && other.invertColors == invertColors
        && other.accessibleNavigation == accessibleNavigation
        && other.boldText == boldText
        && other.navigationMode == navigationMode
        && other.gestureSettings == gestureSettings
        && listEquals(other.displayFeatures, displayFeatures);
  }

  @override
  int get hashCode => Object.hash(
    size,
    devicePixelRatio,
    textScaleFactor,
    platformBrightness,
    padding,
    viewPadding,
    viewInsets,
    alwaysUse24HourFormat,
    highContrast,
    onOffSwitchLabels,
    disableAnimations,
    invertColors,
    accessibleNavigation,
    boldText,
    navigationMode,
    gestureSettings,
    Object.hashAll(displayFeatures),
  );

  @override
  String toString() {
    final List<String> properties = <String>[
      'size: $size',
      'devicePixelRatio: ${devicePixelRatio.toStringAsFixed(1)}',
      'textScaler: $textScaler',
      'platformBrightness: $platformBrightness',
      'padding: $padding',
      'viewPadding: $viewPadding',
      'viewInsets: $viewInsets',
      'systemGestureInsets: $systemGestureInsets',
      'alwaysUse24HourFormat: $alwaysUse24HourFormat',
      'accessibleNavigation: $accessibleNavigation',
      'highContrast: $highContrast',
      'onOffSwitchLabels: $onOffSwitchLabels',
      'disableAnimations: $disableAnimations',
      'invertColors: $invertColors',
      'boldText: $boldText',
      'navigationMode: ${navigationMode.name}',
      'gestureSettings: $gestureSettings',
      'displayFeatures: $displayFeatures',
    ];
    return '${objectRuntimeType(this, 'MediaQueryData')}(${properties.join(', ')})';
  }
}

/// Establishes a subtree in which media queries resolve to the given data.
///
/// For example, to learn the size of the current media (e.g., the window
/// containing your app), you can use [MediaQuery.sizeOf]:
/// `MediaQuery.sizeOf(context)`.
///
/// Querying the current media using specific methods (for example,
/// [MediaQuery.sizeOf] and [MediaQuery.paddingOf]) will cause your widget to
/// rebuild automatically whenever the property you query changes.
///
/// On the other hand, querying using [MediaQuery.of] will cause your widget to
/// rebuild automatically whenever any field of the [MediaQueryData] changes
/// (e.g., if the user rotates their device). Therefore, if you are only
/// concerned with one or a few fields of [MediaQueryData], prefer using
/// the specific methods (for example: [MediaQuery.sizeOf] and
/// [MediaQuery.paddingOf]).
///
/// If no [MediaQuery] is in scope then the series of methods like
/// [MediaQuery.of] and [MediaQuery.sizeOf] will throw an exception.
/// Alternatively, the "maybe-" variant methods (such as [MediaQuery.maybeOf]
/// and [MediaQuery.maybeSizeOf]) can be used, which returns
/// null instead of throwing if no [MediaQuery] is in scope.
///
/// {@youtube 560 315 https://www.youtube.com/watch?v=A3WrA4zAaPw}
///
/// See also:
///
///  * [WidgetsApp] and [MaterialApp], which introduce a [MediaQuery] and keep
///    it up to date with the current screen metrics as they change.
///  * [MediaQueryData], the data structure that represents the metrics.
class MediaQuery extends InheritedModel<_MediaQueryAspect> {
  /// Creates a widget that provides [MediaQueryData] to its descendants.
  ///
  /// The [data] and [child] arguments must not be null.
  const MediaQuery({
    super.key,
    required this.data,
    required super.child,
  });

  /// Creates a new [MediaQuery] that inherits from the ambient [MediaQuery]
  /// from the given context, but removes the specified padding.
  ///
  /// This should be inserted into the widget tree when the [MediaQuery] padding
  /// is consumed by a widget in such a way that the padding is no longer
  /// exposed to the widget's descendants or siblings.
  ///
  /// The [context] argument is required, must not be null, and must have a
  /// [MediaQuery] in scope.
  ///
  /// The `removeLeft`, `removeTop`, `removeRight`, and `removeBottom` arguments
  /// must not be null. If all four are false (the default) then the returned
  /// [MediaQuery] reuses the ambient [MediaQueryData] unmodified, which is not
  /// particularly useful.
  ///
  /// The [child] argument is required and must not be null.
  ///
  /// See also:
  ///
  ///  * [SafeArea], which both removes the padding from the [MediaQuery] and
  ///    adds a [Padding] widget.
  ///  * [MediaQueryData.padding], the affected property of the
  ///    [MediaQueryData].
  ///  * [removeViewInsets], the same thing but for [MediaQueryData.viewInsets].
  ///  * [removeViewPadding], the same thing but for
  ///    [MediaQueryData.viewPadding].
  factory MediaQuery.removePadding({
    Key? key,
    required BuildContext context,
    bool removeLeft = false,
    bool removeTop = false,
    bool removeRight = false,
    bool removeBottom = false,
    required Widget child,
  }) {
    return MediaQuery(
      key: key,
      data: MediaQuery.of(context).removePadding(
        removeLeft: removeLeft,
        removeTop: removeTop,
        removeRight: removeRight,
        removeBottom: removeBottom,
      ),
      child: child,
    );
  }

  /// Creates a new [MediaQuery] that inherits from the ambient [MediaQuery]
  /// from the given context, but removes the specified view insets.
  ///
  /// This should be inserted into the widget tree when the [MediaQuery] view
  /// insets are consumed by a widget in such a way that the view insets are no
  /// longer exposed to the widget's descendants or siblings.
  ///
  /// The [context] argument is required, must not be null, and must have a
  /// [MediaQuery] in scope.
  ///
  /// The `removeLeft`, `removeTop`, `removeRight`, and `removeBottom` arguments
  /// must not be null. If all four are false (the default) then the returned
  /// [MediaQuery] reuses the ambient [MediaQueryData] unmodified, which is not
  /// particularly useful.
  ///
  /// The [child] argument is required and must not be null.
  ///
  /// See also:
  ///
  ///  * [MediaQueryData.viewInsets], the affected property of the
  ///    [MediaQueryData].
  ///  * [removePadding], the same thing but for [MediaQueryData.padding].
  ///  * [removeViewPadding], the same thing but for
  ///    [MediaQueryData.viewPadding].
  factory MediaQuery.removeViewInsets({
    Key? key,
    required BuildContext context,
    bool removeLeft = false,
    bool removeTop = false,
    bool removeRight = false,
    bool removeBottom = false,
    required Widget child,
  }) {
    return MediaQuery(
      key: key,
      data: MediaQuery.of(context).removeViewInsets(
        removeLeft: removeLeft,
        removeTop: removeTop,
        removeRight: removeRight,
        removeBottom: removeBottom,
      ),
      child: child,
    );
  }

  /// Creates a new [MediaQuery] that inherits from the ambient [MediaQuery]
  /// from the given context, but removes the specified view padding.
  ///
  /// This should be inserted into the widget tree when the [MediaQuery] view
  /// padding is consumed by a widget in such a way that the view padding is no
  /// longer exposed to the widget's descendants or siblings.
  ///
  /// The [context] argument is required, must not be null, and must have a
  /// [MediaQuery] in scope.
  ///
  /// The `removeLeft`, `removeTop`, `removeRight`, and `removeBottom` arguments
  /// must not be null. If all four are false (the default) then the returned
  /// [MediaQuery] reuses the ambient [MediaQueryData] unmodified, which is not
  /// particularly useful.
  ///
  /// The [child] argument is required and must not be null.
  ///
  /// See also:
  ///
  ///  * [MediaQueryData.viewPadding], the affected property of the
  ///    [MediaQueryData].
  ///  * [removePadding], the same thing but for [MediaQueryData.padding].
  ///  * [removeViewInsets], the same thing but for [MediaQueryData.viewInsets].
  factory MediaQuery.removeViewPadding({
    Key? key,
    required BuildContext context,
    bool removeLeft = false,
    bool removeTop = false,
    bool removeRight = false,
    bool removeBottom = false,
    required Widget child,
  }) {
    return MediaQuery(
      key: key,
      data: MediaQuery.of(context).removeViewPadding(
        removeLeft: removeLeft,
        removeTop: removeTop,
        removeRight: removeRight,
        removeBottom: removeBottom,
      ),
      child: child,
    );
  }

  /// Deprecated. Use [MediaQuery.fromView] instead.
  ///
  /// This constructor was operating on a single window assumption. In
  /// preparation for Flutter's upcoming multi-window support, it has been
  /// deprecated.
  ///
  /// Replaced by [MediaQuery.fromView], which requires specifying the
  /// [FlutterView] the [MediaQuery] is constructed for. The [FlutterView] can,
  /// for example, be obtained from the context via [View.of] or from
  /// [PlatformDispatcher.views].
  @Deprecated(
    'Use MediaQuery.fromView instead. '
    'This constructor was deprecated in preparation for the upcoming multi-window support. '
    'This feature was deprecated after v3.7.0-32.0.pre.'
  )
  static Widget fromWindow({
    Key? key,
    required Widget child,
  }) {
    return _MediaQueryFromView(
      key: key,
      view: WidgetsBinding.instance.window,
      ignoreParentData: true,
      child: child,
    );
  }

  /// Wraps the [child] in a [MediaQuery] which is built using data from the
  /// provided [view].
  ///
  /// The [MediaQuery] is constructed using the platform-specific data of the
  /// surrounding [MediaQuery] and the view-specific data of the provided
  /// [view]. If no surrounding [MediaQuery] exists, the platform-specific data
  /// is generated from the [PlatformDispatcher] associated with the provided
  /// [view]. Any information that's exposed via the [PlatformDispatcher] is
  /// considered platform-specific. Data exposed directly on the [FlutterView]
  /// (excluding its [FlutterView.platformDispatcher] property) is considered
  /// view-specific.
  ///
  /// The injected [MediaQuery] automatically updates when any of the data used
  /// to construct it changes.
  ///
  /// The [view] and [child] arguments are required and must not be null.
  static Widget fromView({
    Key? key,
    required FlutterView view,
    required Widget child,
  }) {
    return _MediaQueryFromView(
      key: key,
      view: view,
      child: child,
    );
  }

  /// Wraps the `child` in a [MediaQuery] with its [MediaQueryData.textScaler]
  /// set to [TextScaler.noScaling].
  ///
  /// The returned widget must be inserted in a widget tree below an existing
  /// [MediaQuery] widget.
  ///
  /// This can be used to prevent, for example, icon fonts from scaling as the
  /// user adjusts the platform's text scaling value.
  static Widget withNoTextScaling({
    Key? key,
    required Widget child,
  }) {
    return Builder(
      key: key,
      builder: (BuildContext context) {
        assert(debugCheckHasMediaQuery(context));
        return MediaQuery(
          data: MediaQuery.of(context).copyWith(textScaler: TextScaler.noScaling),
          child: child,
        );
      },
    );
  }

  /// Wraps the `child` in a [MediaQuery] and applies [TextScaler.clamp] on the
  /// current [MediaQueryData.textScaler].
  ///
  /// The returned widget must be inserted in a widget tree below an existing
  /// [MediaQuery] widget.
  ///
  /// This is a convenience function to restrict the range of the scaled text
  /// size to `[minScaleFactor * fontSize, maxScaleFactor * fontSize]` (to
  /// prevent excessive text scaling that would break the UI, for example). When
  /// `minScaleFactor` equals `maxScaleFactor`, the scaler becomes
  /// `TextScaler.linear(minScaleFactor)`.
  static Widget withClampedTextScaling({
    Key? key,
    double minScaleFactor = 0.0,
    double maxScaleFactor = double.infinity,
    required Widget child,
  }) {
    assert(maxScaleFactor >= minScaleFactor);
    assert(!maxScaleFactor.isNaN);
    assert(minScaleFactor.isFinite);
    assert(minScaleFactor >= 0);

    return Builder(builder: (BuildContext context) {
      assert(debugCheckHasMediaQuery(context));
      final MediaQueryData data = MediaQuery.of(context);
      return MediaQuery(
        data: data.copyWith(
          textScaler: data.textScaler.clamp(minScaleFactor: minScaleFactor, maxScaleFactor: maxScaleFactor),
        ),
        child: child,
      );
    });
  }

  /// Contains information about the current media.
  ///
  /// For example, the [MediaQueryData.size] property contains the width and
  /// height of the current window.
  final MediaQueryData data;

  /// The data from the closest instance of this class that encloses the given
  /// context.
  ///
  /// You can use this function to query the size and orientation of the screen,
  /// as well as other media parameters (see [MediaQueryData] for more
  /// examples). When that information changes, your widget will be scheduled to
  /// be rebuilt, keeping your widget up-to-date.
  ///
  /// If the widget only requires a subset of properties of the [MediaQueryData]
  /// object, it is preferred to use the specific methods (for example:
  /// [MediaQuery.sizeOf] and [MediaQuery.paddingOf]), as those methods will not
  /// cause a widget to rebuild when unrelated properties are updated.
  ///
  /// Typical usage is as follows:
  ///
  /// ```dart
  /// MediaQueryData media = MediaQuery.of(context);
  /// ```
  ///
  /// If there is no [MediaQuery] in scope, this will throw a [TypeError]
  /// exception in release builds, and throw a descriptive [FlutterError] in
  /// debug builds.
  ///
  /// See also:
  ///
  ///  * [maybeOf], which doesn't throw or assert if it doesn't find a
  ///    [MediaQuery] ancestor, it returns null instead.
  static MediaQueryData of(BuildContext context) {
    return _of(context);
  }

  static MediaQueryData _of(BuildContext context, [_MediaQueryAspect? aspect]) {
    assert(debugCheckHasMediaQuery(context));
    return InheritedModel.inheritFrom<MediaQuery>(context, aspect: aspect)!.data;
  }

  /// The data from the closest instance of this class that encloses the given
  /// context, if any.
  ///
  /// Use this function if you want to allow situations where no [MediaQuery] is
  /// in scope. Prefer using [MediaQuery.of] in situations where a media query
  /// is always expected to exist.
  ///
  /// If there is no [MediaQuery] in scope, then this function will return null.
  ///
  /// You can use this function to query the size and orientation of the screen,
  /// as well as other media parameters (see [MediaQueryData] for more
  /// examples). When that information changes, your widget will be scheduled to
  /// be rebuilt, keeping your widget up-to-date.
  ///
  /// If the widget only requires a subset of properties of the [MediaQueryData]
  /// object, it is preferred to use the specific methods (for example:
  /// [MediaQuery.maybeSizeOf] and [MediaQuery.maybePaddingOf]), as those methods
  /// will not cause a widget to rebuild when unrelated properties are updated.
  ///
  /// Typical usage is as follows:
  ///
  /// ```dart
  /// MediaQueryData? mediaQuery = MediaQuery.maybeOf(context);
  /// if (mediaQuery == null) {
  ///   // Do something else instead.
  /// }
  /// ```
  ///
  /// See also:
  ///
  ///  * [of], which will throw if it doesn't find a [MediaQuery] ancestor,
  ///    instead of returning null.
  static MediaQueryData? maybeOf(BuildContext context) {
    return _maybeOf(context);
  }

  static MediaQueryData? _maybeOf(BuildContext context, [_MediaQueryAspect? aspect]) {
    return InheritedModel.inheritFrom<MediaQuery>(context, aspect: aspect)?.data;
  }

  /// Returns size for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.size] property of the ancestor [MediaQuery] changes.
  static Size sizeOf(BuildContext context) => _of(context, _MediaQueryAspect.size).size;

  /// Returns size for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.size] property of the ancestor [MediaQuery] changes.
  static Size? maybeSizeOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.size)?.size;

  /// Returns orientation for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.orientation] property of the ancestor [MediaQuery] changes.
  static Orientation orientationOf(BuildContext context) => _of(context, _MediaQueryAspect.orientation).orientation;

  /// Returns orientation for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.orientation] property of the ancestor [MediaQuery] changes.
  static Orientation? maybeOrientationOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.orientation)?.orientation;

  /// Returns devicePixelRatio for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.devicePixelRatio] property of the ancestor [MediaQuery] changes.
  static double devicePixelRatioOf(BuildContext context) => _of(context, _MediaQueryAspect.devicePixelRatio).devicePixelRatio;

  /// Returns devicePixelRatio for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.devicePixelRatio] property of the ancestor [MediaQuery] changes.
  static double? maybeDevicePixelRatioOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.devicePixelRatio)?.devicePixelRatio;

  /// Deprecated. Will be removed in a future version of Flutter. Use
  /// [maybeTextScalerOf] instead.
  ///
  /// Returns textScaleFactor for the nearest MediaQuery ancestor or
  /// 1.0, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.textScaleFactor] property of the ancestor [MediaQuery] changes.
  @Deprecated(
    'Use textScalerOf instead. '
    'Use of textScaleFactor was deprecated in preparation for the upcoming nonlinear text scaling support. '
    'This feature was deprecated after v3.12.0-2.0.pre.',
  )
  static double textScaleFactorOf(BuildContext context) => maybeTextScaleFactorOf(context) ?? 1.0;

  /// Deprecated. Will be removed in a future version of Flutter. Use
  /// [maybeTextScalerOf] instead.
  ///
  /// Returns textScaleFactor for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.textScaleFactor] property of the ancestor [MediaQuery]
  /// changes.
  @Deprecated(
    'Use maybeTextScalerOf instead. '
    'Use of textScaleFactor was deprecated in preparation for the upcoming nonlinear text scaling support. '
    'This feature was deprecated after v3.12.0-2.0.pre.',
  )
  static double? maybeTextScaleFactorOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.textScaleFactor)?.textScaleFactor;

  /// Returns the [TextScaler] for the nearest [MediaQuery] ancestor or null if
  /// no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.textScaler] property of the ancestor [MediaQuery]
  /// changes.
  static TextScaler textScalerOf(BuildContext context) => maybeTextScalerOf(context) ?? TextScaler.noScaling;

  /// Returns the [TextScaler] for the nearest [MediaQuery] ancestor or
  /// [TextScaler.noScaling] if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.textScaler] property of the ancestor [MediaQuery]
  /// changes.
  static TextScaler? maybeTextScalerOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.textScaler)?.textScaler;

  /// Returns platformBrightness for the nearest MediaQuery ancestor or
  /// [Brightness.light], if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.platformBrightness] property of the ancestor
  /// [MediaQuery] changes.
  static Brightness platformBrightnessOf(BuildContext context) => maybePlatformBrightnessOf(context) ?? Brightness.light;

  /// Returns platformBrightness for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.platformBrightness] property of the ancestor
  /// [MediaQuery] changes.
  static Brightness? maybePlatformBrightnessOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.platformBrightness)?.platformBrightness;

  /// Returns padding for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.padding] property of the ancestor [MediaQuery] changes.
  static EdgeInsets paddingOf(BuildContext context) => _of(context, _MediaQueryAspect.padding).padding;

  /// Returns viewInsets for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.viewInsets] property of the ancestor [MediaQuery] changes.
  static EdgeInsets? maybePaddingOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.padding)?.padding;

  /// Returns viewInsets for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.viewInsets] property of the ancestor [MediaQuery] changes.
  static EdgeInsets viewInsetsOf(BuildContext context) => _of(context, _MediaQueryAspect.viewInsets).viewInsets;

  /// Returns viewInsets for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.viewInsets] property of the ancestor [MediaQuery] changes.
  static EdgeInsets? maybeViewInsetsOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.viewInsets)?.viewInsets;

  /// Returns systemGestureInsets for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.systemGestureInsets] property of the ancestor [MediaQuery] changes.
  static EdgeInsets systemGestureInsetsOf(BuildContext context) => _of(context, _MediaQueryAspect.systemGestureInsets).systemGestureInsets;

  /// Returns systemGestureInsets for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.systemGestureInsets] property of the ancestor [MediaQuery] changes.
  static EdgeInsets? maybeSystemGestureInsetsOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.systemGestureInsets)?.systemGestureInsets;

  /// Returns viewPadding for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.viewPadding] property of the ancestor [MediaQuery] changes.
  static EdgeInsets viewPaddingOf(BuildContext context) => _of(context, _MediaQueryAspect.viewPadding).viewPadding;

  /// Returns viewPadding for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.viewPadding] property of the ancestor [MediaQuery] changes.
  static EdgeInsets? maybeViewPaddingOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.viewPadding)?.viewPadding;

  /// Returns alwaysUse for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.devicePixelRatio] property of the ancestor [MediaQuery] changes.
  static bool alwaysUse24HourFormatOf(BuildContext context) => _of(context, _MediaQueryAspect.alwaysUse24HourFormat).alwaysUse24HourFormat;

  /// Returns alwaysUse24HourFormat for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.alwaysUse24HourFormat] property of the ancestor [MediaQuery] changes.
  static bool? maybeAlwaysUse24HourFormatOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.alwaysUse24HourFormat)?.alwaysUse24HourFormat;

  /// Returns accessibleNavigationOf for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.accessibleNavigation] property of the ancestor [MediaQuery] changes.
  static bool accessibleNavigationOf(BuildContext context) => _of(context, _MediaQueryAspect.accessibleNavigation).accessibleNavigation;

  /// Returns accessibleNavigation for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.accessibleNavigation] property of the ancestor [MediaQuery] changes.
  static bool? maybeAccessibleNavigationOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.accessibleNavigation)?.accessibleNavigation;

  /// Returns invertColorsOf for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.invertColors] property of the ancestor [MediaQuery] changes.
  static bool invertColorsOf(BuildContext context) => _of(context, _MediaQueryAspect.invertColors).invertColors;

  /// Returns invertColors for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.invertColors] property of the ancestor [MediaQuery] changes.
  static bool? maybeInvertColorsOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.invertColors)?.invertColors;

  /// Returns highContrast for the nearest MediaQuery ancestor or false, if no
  /// such ancestor exists.
  ///
  /// See also:
  ///
  ///  * [MediaQueryData.highContrast], which indicates the platform's
  ///    desire to increase contrast.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.highContrast] property of the ancestor [MediaQuery] changes.
  static bool highContrastOf(BuildContext context) => maybeHighContrastOf(context) ?? false;

  /// Returns highContrast for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.highContrast] property of the ancestor [MediaQuery] changes.
  static bool? maybeHighContrastOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.highContrast)?.highContrast;

  /// Returns onOffSwitchLabels for the nearest MediaQuery ancestor or false, if no
  /// such ancestor exists.
  ///
  /// See also:
  ///
  ///  * [MediaQueryData.onOffSwitchLabels], which indicates the platform's
  ///    desire to show on/off labels inside switches.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.onOffSwitchLabels] property of the ancestor [MediaQuery] changes.
  static bool onOffSwitchLabelsOf(BuildContext context) => maybeOnOffSwitchLabelsOf(context) ?? false;

  /// Returns onOffSwitchLabels for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.onOffSwitchLabels] property of the ancestor [MediaQuery] changes.
  static bool? maybeOnOffSwitchLabelsOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.onOffSwitchLabels)?.onOffSwitchLabels;

  /// Returns disableAnimations for the nearest MediaQuery ancestor or
  /// [Brightness.light], if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.disableAnimations] property of the ancestor
  /// [MediaQuery] changes.
  static bool disableAnimationsOf(BuildContext context) => _of(context, _MediaQueryAspect.disableAnimations).disableAnimations;

  /// Returns disableAnimations for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.disableAnimations] property of the ancestor [MediaQuery] changes.
  static bool? maybeDisableAnimationsOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.disableAnimations)?.disableAnimations;


  /// Returns the boldText accessibility setting for the nearest MediaQuery
  /// ancestor or false, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.boldText] property of the ancestor [MediaQuery] changes.
  static bool boldTextOf(BuildContext context) => maybeBoldTextOf(context) ?? false;

  /// Returns the boldText accessibility setting for the nearest MediaQuery
  /// ancestor or false, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.boldText] property of the ancestor [MediaQuery] changes.
  ///
  /// Deprecated in favor of [boldTextOf].
  @Deprecated(
    'Migrate to boldTextOf. '
    'This feature was deprecated after v3.5.0-9.0.pre.'
  )
  static bool boldTextOverride(BuildContext context) => boldTextOf(context);

  /// Returns the boldText accessibility setting for the nearest MediaQuery
  /// ancestor or null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.boldText] property of the ancestor [MediaQuery] changes.
  static bool? maybeBoldTextOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.boldText)?.boldText;

  /// Returns navigationMode for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.navigationMode] property of the ancestor [MediaQuery] changes.
  static NavigationMode navigationModeOf(BuildContext context) => _of(context, _MediaQueryAspect.navigationMode).navigationMode;

  /// Returns navigationMode for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.navigationMode] property of the ancestor [MediaQuery] changes.
  static NavigationMode? maybeNavigationModeOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.navigationMode)?.navigationMode;

  /// Returns gestureSettings for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.gestureSettings] property of the ancestor [MediaQuery] changes.
  static DeviceGestureSettings gestureSettingsOf(BuildContext context) => _of(context, _MediaQueryAspect.gestureSettings).gestureSettings;

  /// Returns gestureSettings for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.gestureSettings] property of the ancestor [MediaQuery] changes.
  static DeviceGestureSettings? maybeGestureSettingsOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.gestureSettings)?.gestureSettings;

  /// Returns displayFeatures for the nearest MediaQuery ancestor or
  /// throws an exception, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.displayFeatures] property of the ancestor [MediaQuery] changes.
  static List<ui.DisplayFeature> displayFeaturesOf(BuildContext context) => _of(context, _MediaQueryAspect.displayFeatures).displayFeatures;

  /// Returns displayFeatures for the nearest MediaQuery ancestor or
  /// null, if no such ancestor exists.
  ///
  /// Use of this method will cause the given [context] to rebuild any time that
  /// the [MediaQueryData.displayFeatures] property of the ancestor [MediaQuery] changes.
  static List<ui.DisplayFeature>? maybeDisplayFeaturesOf(BuildContext context) => _maybeOf(context, _MediaQueryAspect.displayFeatures)?.displayFeatures;

  @override
  bool updateShouldNotify(MediaQuery oldWidget) => data != oldWidget.data;

  @override
  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
    super.debugFillProperties(properties);
    properties.add(DiagnosticsProperty<MediaQueryData>('data', data, showName: false));
  }

  @override
  bool updateShouldNotifyDependent(MediaQuery oldWidget, Set<Object> dependencies) {
    for (final Object dependency in dependencies) {
      if (dependency is _MediaQueryAspect) {
        switch (dependency) {
          case _MediaQueryAspect.size:
            if (data.size != oldWidget.data.size) {
              return true;
            }
          case _MediaQueryAspect.orientation:
            if (data.orientation != oldWidget.data.orientation) {
              return true;
            }
          case _MediaQueryAspect.devicePixelRatio:
            if (data.devicePixelRatio != oldWidget.data.devicePixelRatio) {
              return true;
            }
          case _MediaQueryAspect.textScaleFactor:
            if (data.textScaleFactor != oldWidget.data.textScaleFactor) {
              return true;
            }
          case _MediaQueryAspect.textScaler:
            if (data.textScaler != oldWidget.data.textScaler) {
              return true;
            }
          case _MediaQueryAspect.platformBrightness:
            if (data.platformBrightness != oldWidget.data.platformBrightness) {
              return true;
            }
          case _MediaQueryAspect.padding:
            if (data.padding != oldWidget.data.padding) {
              return true;
            }
          case _MediaQueryAspect.viewInsets:
            if (data.viewInsets != oldWidget.data.viewInsets) {
              return true;
            }
          case _MediaQueryAspect.systemGestureInsets:
            if (data.systemGestureInsets != oldWidget.data.systemGestureInsets) {
              return true;
            }
          case _MediaQueryAspect.viewPadding:
            if (data.viewPadding != oldWidget.data.viewPadding) {
              return true;
            }
          case _MediaQueryAspect.alwaysUse24HourFormat:
            if (data.alwaysUse24HourFormat != oldWidget.data.alwaysUse24HourFormat) {
              return true;
            }
          case _MediaQueryAspect.accessibleNavigation:
            if (data.accessibleNavigation != oldWidget.data.accessibleNavigation) {
              return true;
            }
          case _MediaQueryAspect.invertColors:
            if (data.invertColors != oldWidget.data.invertColors) {
              return true;
            }
          case _MediaQueryAspect.highContrast:
            if (data.highContrast != oldWidget.data.highContrast) {
              return true;
            }
          case _MediaQueryAspect.onOffSwitchLabels:
            if (data.onOffSwitchLabels != oldWidget.data.onOffSwitchLabels) {
              return true;
            }
          case _MediaQueryAspect.disableAnimations:
            if (data.disableAnimations != oldWidget.data.disableAnimations) {
              return true;
            }
          case _MediaQueryAspect.boldText:
            if (data.boldText != oldWidget.data.boldText) {
              return true;
            }
          case _MediaQueryAspect.navigationMode:
            if (data.navigationMode != oldWidget.data.navigationMode) {
              return true;
            }
          case _MediaQueryAspect.gestureSettings:
            if (data.gestureSettings != oldWidget.data.gestureSettings) {
              return true;
            }
          case _MediaQueryAspect.displayFeatures:
            if (data.displayFeatures != oldWidget.data.displayFeatures) {
              return true;
            }
        }
      }
    }
    return false;
  }
}

/// Describes the navigation mode to be set by a [MediaQuery] widget.
///
/// The different modes indicate the type of navigation to be used in a widget
/// subtree for those widgets sensitive to it.
///
/// Use `MediaQuery.navigationModeOf(context)` to determine the navigation mode
/// in effect for the given context. Use a [MediaQuery] widget to set the
/// navigation mode for its descendant widgets.
enum NavigationMode {
  /// This indicates a traditional keyboard-and-mouse navigation modality.
  ///
  /// This navigation mode is where the arrow keys can be used for secondary
  /// modification operations, like moving sliders or cursors, and disabled
  /// controls will lose focus and not be traversable.
  traditional,

  /// This indicates a directional-based navigation mode.
  ///
  /// This navigation mode indicates that arrow keys should be reserved for
  /// navigation operations, and secondary modifications operations, like moving
  /// sliders or cursors, will use alternative bindings or be disabled.
  ///
  /// Some behaviors are also affected by this mode. For instance, disabled
  /// controls will retain focus when disabled, and will be able to receive
  /// focus (although they remain disabled) when traversed.
  directional,
}

class _MediaQueryFromView extends StatefulWidget {
  const _MediaQueryFromView({
    super.key,
    required this.view,
    this.ignoreParentData = false,
    required this.child,
  });

  final FlutterView view;
  final bool ignoreParentData;
  final Widget child;

  @override
  State<_MediaQueryFromView> createState() => _MediaQueryFromViewState();
}

class _MediaQueryFromViewState extends State<_MediaQueryFromView> with WidgetsBindingObserver {
  MediaQueryData? _parentData;
  MediaQueryData? _data;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _updateParentData();
    _updateData();
    assert(_data != null);
  }

  @override
  void didUpdateWidget(_MediaQueryFromView oldWidget) {
    super.didUpdateWidget(oldWidget);
    if (widget.ignoreParentData != oldWidget.ignoreParentData) {
      _updateParentData();
    }
    if (_data == null || oldWidget.view != widget.view) {
      _updateData();
    }
    assert(_data != null);
  }

  void _updateParentData() {
    _parentData = widget.ignoreParentData ? null : MediaQuery.maybeOf(context);
    _data = null; // _updateData must be called again after changing parent data.
  }

  void _updateData() {
    final MediaQueryData newData = MediaQueryData.fromView(widget.view, platformData: _parentData);
    if (newData != _data) {
      setState(() {
        _data = newData;
      });
    }
  }

  @override
  void didChangeAccessibilityFeatures() {
    // If we have a parent, it dictates our accessibility features. If we don't
    // have a parent, we get our accessibility features straight from the
    // PlatformDispatcher and need to update our data in response to the
    // PlatformDispatcher changing its accessibility features setting.
    if (_parentData == null) {
      _updateData();
    }
  }

  @override
  void didChangeMetrics() {
    _updateData();
  }

  @override
  void didChangeTextScaleFactor() {
    // If we have a parent, it dictates our text scale factor. If we don't have
    // a parent, we get our text scale factor from the PlatformDispatcher and
    // need to update our data in response to the PlatformDispatcher changing
    // its text scale factor setting.
    if (_parentData == null) {
      _updateData();
    }
  }

  @override
  void didChangePlatformBrightness() {
    // If we have a parent, it dictates our platform brightness. If we don't
    // have a parent, we get our platform brightness from the PlatformDispatcher
    // and need to update our data in response to the PlatformDispatcher
    // changing its platform brightness setting.
    if (_parentData == null) {
      _updateData();
    }
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    MediaQueryData effectiveData = _data!;
    // If we get our platformBrightness from the PlatformDispatcher (i.e. we have no parentData) replace it
    // with the debugBrightnessOverride in non-release mode.
    if (!kReleaseMode && _parentData == null && effectiveData.platformBrightness != debugBrightnessOverride) {
      effectiveData = effectiveData.copyWith(platformBrightness: debugBrightnessOverride);
    }
    return MediaQuery(
      data: effectiveData,
      child: widget.child,
    );
  }
}

const TextScaler _kUnspecifiedTextScaler = _UnspecifiedTextScaler();
// TODO(LongCatIsLooong): Remove once `MediaQueryData.textScaleFactor` is
// removed: https://github.com/flutter/flutter/issues/128825.
class _UnspecifiedTextScaler implements TextScaler {
  const _UnspecifiedTextScaler();

  @override
  TextScaler clamp({double minScaleFactor = 0, double maxScaleFactor = double.infinity}) => throw UnimplementedError();

  @override
  double scale(double fontSize) => throw UnimplementedError();

  @override
  double get textScaleFactor => throw UnimplementedError();
}