MediaQuery

Runtime/engine/WidgetCanvas.cs

             }
             
             _windowAdapter.OnEnable();
-            var root = new WidgetsApp(null, getWidget(), _windowAdapter);
+            var root = new WidgetsApp(home: getWidget(), window: _windowAdapter);
             _windowAdapter.attachRootWidget(root);
             _lastMouseMove = Input.mousePosition;
         }

Runtime/painting/edge_insets.cs

             return new EdgeInsets(horizontal, vertical, horizontal, vertical);
         }
 
+        public static EdgeInsets fromWindowPadding(WindowPadding padding, double devicePixelRatio) {
+            return new EdgeInsets(
+                left: padding.left / devicePixelRatio,
+                top: padding.top / devicePixelRatio,
+                right: padding.right / devicePixelRatio,
+                bottom: padding.bottom / devicePixelRatio
+            );
+        }
+
         public static readonly EdgeInsets zero = EdgeInsets.only();
 
         public Offset topLeft {

Runtime/painting/image_resolution.cs

 using System;
 using System.Collections;
+using System.Collections.Generic;
 using RSG;
 using Unity.UIWidgets.async;
 using Unity.UIWidgets.foundation;
         public readonly string assetName;
         public readonly AssetBundle bundle;
 
+        readonly Dictionary<ImageConfiguration, AssetBundleImageKey> _cache =
+            new Dictionary<ImageConfiguration, AssetBundleImageKey>();
+
+
+            AssetBundleImageKey key;
+            if (this._cache.TryGetValue(configuration, out key)) {
+                return Promise<AssetBundleImageKey>.Resolved(key);
+            }
+            
-                return (AssetBundleImageKey) result;
+
+                key = (AssetBundleImageKey) result;
+                this._cache[configuration] = key;
+                return key;
             });
         }
 
                     asset = request.asset;
                 }
 
-                if (asset != null) {
+                if (asset != null) {                    
+                    if (bundle == null) {
+                        Resources.UnloadAsset(asset);
+                    } else {
+                        bundle.Unload(asset);
+                    }
+                    
                     yield return new AssetBundleImageKey(
                         bundle,
                         assetName,

Runtime/rendering/binding.cs

             );
 
             Window.instance.onMetricsChanged += this.handleMetricsChanged;
+            Window.instance.onTextScaleFactorChanged += this.handleTextScaleFactorChanged;
             this.initRenderView();
             D.assert(this.renderView != null);
             this.addPersistentFrameCallback(this._handlePersistentFrameCallback);
         protected virtual void handleMetricsChanged() {
             this.renderView.configuration = this.createViewConfiguration();
             this.scheduleForcedFrame();
+        }
+
+        protected virtual void handleTextScaleFactorChanged() {
         }
 
         protected virtual ViewConfiguration createViewConfiguration() {

Runtime/ui/window.cs

 using System;
+using System.Collections.Generic;
 using Unity.UIWidgets.async;
 using Unity.UIWidgets.service;
 using Unity.UIWidgets.foundation;
 
     public delegate void PointerDataPacketCallback(PointerDataPacket packet);
 
+    public class WindowPadding {
+        public WindowPadding(double left, double top, double right, double bottom) {
+            this.left = left;
+            this.top = top;
+            this.right = right;
+            this.bottom = bottom;
+        }
+
+        public readonly double left;
+
+        public readonly double top;
+
+        public readonly double right;
+
+        public readonly double bottom;
+
+        public static WindowPadding zero = new WindowPadding(left: 0.0, top: 0.0, right: 0.0, bottom: 0.0);
+
+        public override string ToString() {
+            return $"{this.GetType()}(left: {this.left}, top: {this.top}, right: {this.right}, bottom: {this.bottom})";
+        }
+    }
+
+    public class Locale : IEquatable<Locale> {
+        public Locale(string languageCode, string countryCode = null) {
+            D.assert(languageCode != null);
+            this._languageCode = languageCode;
+            this._countryCode = countryCode;
+        }
+
+        readonly string _languageCode;
+
+        public string languageCode => this._languageCode;
+
+        readonly string _countryCode;
+
+        public string countryCode => this._countryCode;
+
+        public bool Equals(Locale other) {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+            return string.Equals(this._languageCode, other._languageCode) &&
+                   string.Equals(this._countryCode, other._countryCode);
+        }
+
+        public override bool Equals(object obj) {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != this.GetType()) return false;
+            return this.Equals((Locale) obj);
+        }
+
+        public override int GetHashCode() {
+            unchecked {
+                return ((this._languageCode != null ? this._languageCode.GetHashCode() : 0) * 397) ^
+                       (this._countryCode != null ? this._countryCode.GetHashCode() : 0);
+            }
+        }
+
+        public static bool operator ==(Locale left, Locale right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(Locale left, Locale right) {
+            return !Equals(left, right);
+        }
+
+        public override string ToString() {
+            if (this.countryCode == null) {
+                return this.languageCode;
+            }
+
+            return $"{this.languageCode}_{this.countryCode}";
+        }
+    }
+
     public abstract class Window {
         public static Window instance {
             get {
         }
 
         public static bool hasInstance {
-            get {
-                return _instance != null;
-            }
+            get { return _instance != null; }
-        public double devicePixelRatio {
-            get { return this._devicePixelRatio; }
-        }
-
+        public double devicePixelRatio => this._devicePixelRatio;
-        public Size physicalSize {
-            get { return this._physicalSize; }
-        }
+        public Size physicalSize => this._physicalSize;
+        protected Size _physicalSize = Size.zero;
-        protected Size _physicalSize = Size.zero;
+        public WindowPadding viewInsets => this._viewInsets;
+        protected WindowPadding _viewInsets = WindowPadding.zero;
+        
+        public WindowPadding padding => this._padding;
+        protected WindowPadding _padding = WindowPadding.zero;
 
         public VoidCallback onMetricsChanged {
             get { return this._onMetricsChanged; }
         VoidCallback _onMetricsChanged;
 
+        public Locale locale {
+            get {
+                if (this._locales != null && this._locales.isNotEmpty()) {
+                    return this._locales[0];
+                }
+
+                return null;
+            }
+        }
+
+        public List<Locale> locales => this._locales;
+        protected List<Locale> _locales;
+
         public VoidCallback onLocaleChanged {
             get { return this._onLocaleChanged; }
             set { this._onLocaleChanged = value; }
 
+        public double textScaleFactor => this._textScaleFactor;
+        protected double _textScaleFactor = 1.0;
+        
+        public VoidCallback onTextScaleFactorChanged {
+            get { return this._onTextScaleFactorChanged; }
+            set { this._onTextScaleFactorChanged = value; }
+        }
+
+        VoidCallback _onTextScaleFactorChanged;
+    
         public FrameCallback onBeginFrame {
             get { return this._onBeginFrame; }
             set { this._onBeginFrame = value; }
         }
 
         VoidCallback _onDrawFrame;
-        
+
         public PointerDataPacketCallback onPointerEvent {
             get { return this._onPointerEvent; }
             set { this._onPointerEvent = value; }
         public abstract void flushMicrotasks();
 
         public abstract Timer run(TimeSpan duration, Action callback, bool periodic = false);
-        
+
         public Timer run(Action callback) {
             return this.run(TimeSpan.Zero, callback);
         }
         public abstract IDisposable getScope();
     }
 
-
-    public class Locale : IEquatable<Locale> {
-        public Locale(string languageCode, string countryCode = null) {
-            D.assert(languageCode != null);
-            this._languageCode = languageCode;
-            this._countryCode = countryCode;
-        }
-
-        readonly string _languageCode;
-
-        public string languageCode => this._languageCode;
-
-        readonly string _countryCode;
-
-        public string countryCode => this._countryCode;
-
-        public bool Equals(Locale other) {
-            if (ReferenceEquals(null, other)) return false;
-            if (ReferenceEquals(this, other)) return true;
-            return string.Equals(this._languageCode, other._languageCode) &&
-                   string.Equals(this._countryCode, other._countryCode);
-        }
-
-        public override bool Equals(object obj) {
-            if (ReferenceEquals(null, obj)) return false;
-            if (ReferenceEquals(this, obj)) return true;
-            if (obj.GetType() != this.GetType()) return false;
-            return this.Equals((Locale) obj);
-        }
-
-        public override int GetHashCode() {
-            unchecked {
-                return ((this._languageCode != null ? this._languageCode.GetHashCode() : 0) * 397) ^
-                       (this._countryCode != null ? this._countryCode.GetHashCode() : 0);
-            }
-        }
-
-        public static bool operator ==(Locale left, Locale right) {
-            return Equals(left, right);
-        }
-
-        public static bool operator !=(Locale left, Locale right) {
-            return !Equals(left, right);
-        }
-
-        public override string ToString() {
-            if (this.countryCode == null) {
-                return this.languageCode;
-            }
-
-            return $"{this.languageCode}_{this.countryCode}";
-        }
-    }
 }

Runtime/widgets/app.cs

-using System;
+using System.Collections.Generic;
-using UnityEngine;
-namespace Unity.UIWidgets.widgets
-{
-    public class WidgetsApp : StatefulWidget
-    {
+namespace Unity.UIWidgets.widgets {
+    public class WidgetsApp : StatefulWidget {
+        public readonly Window window;
-        public readonly Widget child;
+        public readonly Widget home;
-        public readonly Window window;
-        
-        public WidgetsApp(Key key, Widget child, Window window) : base(key)
-        {
+        public WidgetsApp(
+            Key key = null,
+            Window window = null,
+            Widget home = null
+        ) : base(key) {
-            this.child = child;
+            this.home = home;
-       
-        public override State createState()
-        {
+        public override State createState() {
-        readonly Window _window;
-
-         public WindowProvider(Window window, Widget child, Key key = null) : base(key: key, child: child) {
+        public WindowProvider(Key key = null, Window window = null, Widget child = null) :
+            base(key: key, child: child) {
-            _window = window;
+            this.window = window;
+        public readonly Window window;
+
-            WindowProvider provider = context.inheritFromWidgetOfExactType(typeof(WindowProvider)) as WindowProvider;
+            WindowProvider provider = (WindowProvider) context.inheritFromWidgetOfExactType(typeof(WindowProvider));
-            return provider._window;
+
+            return provider.window;
+
-            D.assert(_window == ((WindowProvider)oldWidget)._window);
+            D.assert(this.window == ((WindowProvider) oldWidget).window);
-    class _WidgetsAppState : State<WidgetsApp>
-    {
-        
+    class _WidgetsAppState : State<WidgetsApp>, WidgetsBindingObserver {
-            D.assert(() =>
-            {
+            D.assert(() => {
+            
+            WidgetsBinding.instance.addObserver(this);
+            WidgetsBinding.instance.removeObserver(this);
-            D.assert(() =>
-            {
+            D.assert(() => {
                 WidgetInspectorService.instance.inspectorShowCallback -= inspectorShowChanged;
                 return true;
             });
-        private void inspectorShowChanged()
-        {
-            setState(() => {});
+        private void inspectorShowChanged() {
+            this.setState();
-        
-        public override Widget build(BuildContext context)
-        {
-            Widget result = widget.child;
-            result = new WindowProvider(widget.window, result);
-            D.assert(() =>
-            {
-                if (WidgetInspectorService.instance.debugShowInspector)
-                {
-                    result = new WidgetInspector(null, result, _InspectorSelectButtonBuilder);
+
+        public void didChangeMetrics() {
+            this.setState();
+        }
+
+        public void didChangeTextScaleFactor() {
+            this.setState();
+        }
+
+        public void didChangeLocales(List<Locale> locale) {
+            // TODO: support locales.
+        }
+
+        public override Widget build(BuildContext context) {
+            Widget result = this.widget.home;
+
+            D.assert(() => {
+                if (WidgetInspectorService.instance.debugShowInspector) {
+                    result = new WidgetInspector(null, result, this._InspectorSelectButtonBuilder);
+
+
+            result = new WindowProvider(
+                window: this.widget.window,
+                child: result
+            );
+
+            result = new MediaQuery(
+                data: MediaQueryData.fromWindow(this.widget.window),
+                child: result
+            );
+
-        private Widget _InspectorSelectButtonBuilder(BuildContext context, VoidCallback onPressed)
-        {
+        private Widget _InspectorSelectButtonBuilder(BuildContext context, VoidCallback onPressed) {
-    
+
-        ) : base(key: key)
-        {
+        ) : base(key: key) {
             this.onPressed = () => onPressed();
         }
 

Runtime/widgets/binding.cs

 namespace Unity.UIWidgets.widgets {
     public interface WidgetsBindingObserver {
         void didChangeMetrics();
+
+        void didChangeTextScaleFactor();
+
+        void didChangeLocales(List<Locale> locale);
     }
 
     public class WidgetsBinding : RendererBinding {
                 observer.didChangeMetrics();
             }
         }
+        
+        protected override void handleTextScaleFactorChanged() {
+            base.handleTextScaleFactorChanged();
+            foreach (WidgetsBindingObserver observer in this._observers) {
+                observer.didChangeTextScaleFactor();
+            }
+        }        
-        void handleLocaleChanged() {
-            // todo
-            // dispatchLocaleChanged(window.locale);
+        protected virtual void handleLocaleChanged() {
+            this.dispatchLocalesChanged(Window.instance.locales);
+        }
+        
+        protected virtual void dispatchLocalesChanged(List<Locale> locales) {
+            foreach (WidgetsBindingObserver observer in this._observers) {
+                observer.didChangeLocales(locales);
+            }
         }
 
         void _handleBuildScheduled() {

Runtime/widgets/framework.cs

         public virtual void didUpdateWidget(StatefulWidget oldWidget) {
         }
 
-        protected void setState(VoidCallback fn) {
-            D.assert(fn != null);
-
+        protected void setState(VoidCallback fn = null) {
             D.assert(() => {
                 if (this._debugLifecycleState == _StateLifecycle.defunct) {
                     throw new UIWidgetsError(
                 return true;
             });
 
-            fn();
+            if (fn != null) {
+                fn();
+            }
+            
             this._element.markNeedsBuild();
         }
 
             D.assert(this.widget != newWidget);
             base.update(newWidget);
             D.assert(this.widget == newWidget);
-            this.notifyClients(oldWidget);
+            this.updated(oldWidget);
+        
+        protected virtual void updated(ProxyWidget oldWidget) {
+            this.notifyClients(oldWidget);
+        }
-        public abstract void notifyClients(ProxyWidget oldWidget);
+        protected abstract void notifyClients(ProxyWidget oldWidget);
     }
 
     public class ParentDataElement : ProxyElement {
             this._applyParentData(newWidget);
         }
 
-        public override void notifyClients(ProxyWidget oldWidget) {
+        protected override void notifyClients(ProxyWidget oldWidget) {
             this._applyParentData(this.widget);
         }
     }
         }
 
         public void setDependencies(Element dependent, object value) {
+            object existing;
+            if (this._dependents.TryGetValue(dependent, out existing)) {
+                if (object.Equals(existing, value)) {
+                    return;
+                }
+            }
+
             this._dependents[dependent] = value;
         }
 
         public void notifyDependent(InheritedWidget oldWidget, Element dependent) {
             dependent.didChangeDependencies();
         }
+        
+        protected override void updated(ProxyWidget oldWidget) {
+            if (this.widget.updateShouldNotify((InheritedWidget) oldWidget)) {
+                base.updated(oldWidget);
+            }
+        }
-        public override void notifyClients(ProxyWidget oldWidgetRaw) {
+        protected override void notifyClients(ProxyWidget oldWidgetRaw) {
-
-            if (!this.widget.updateShouldNotify(oldWidget)) {
-                return;
-            }
 
             D.assert(this._debugCheckOwnerBuildTargetExists("notifyClients"));
             foreach (Element dependent in this._dependents.Keys) {

Runtime/widgets/image.cs

         public static ImageConfiguration createLocalImageConfiguration(BuildContext context, Size size = null) {
             return new ImageConfiguration(
                 bundle: DefaultAssetBundle.of(context),
-                //TODO: add MediaQuery & Localizations.
-                //devicePixelRatio: MediaQuery.of(context, nullOk: true)?.devicePixelRatio ?? 1.0,
+                devicePixelRatio: MediaQuery.of(context, nullOk: true)?.devicePixelRatio ?? 1.0,
                 //locale: Localizations.localeOf(context, nullOk: true),
                 size: size,
                 platform: Application.platform

Runtime/widgets/widget_inspector.cs

             return new Stack(children: children);
         }
 
-        public void didChangeMetrics()
-        {
-            throw new NotImplementedException();
+        public void didChangeMetrics() {
+        }
+
+        public void didChangeTextScaleFactor() {
+        }
+
+        public void didChangeLocales(List<Locale> locale) {
         }
 
         private void _selectionChangedCallback()

Tests/Editor/MouseHover.cs

 {
     public class MouseHoverWidget:StatefulWidget
     {
-        public MouseHoverWidget(Key key) : base(key)
+        public MouseHoverWidget(Key key = null) : base(key)
         {
         }
 

Tests/Editor/Widgets.cs

                 
                 if (this._selected != selected) {
                     this._selected = selected;
-                    this.windowAdapter.attachRootWidget(null);
+                    this._attachRootWidget(null);
-                    this.windowAdapter.attachRootWidget(rootWidget);
+                    this._attachRootWidget(rootWidget);
-                    this.windowAdapter.attachRootWidget(rootWidget);
+                    this._attachRootWidget(rootWidget);
                 }
                 
                 if (GUILayout.Button("UnloadUnusedAssets")) {
 
                 var rootWidget = this._options[this._selected]();
 
-                this.windowAdapter.attachRootWidget(rootWidget);
+                this._attachRootWidget(rootWidget);
+        }
+
+        void _attachRootWidget(Widget widget) {
+            this.windowAdapter.attachRootWidget(new WidgetsApp(window: this.windowAdapter, home: widget));
         }
 
         private void Update() {
         }
 
         Widget asPage() {
-            return new WidgetsApp(null, new AsScreen(), windowAdapter);
+            return new WidgetsApp(home: new AsScreen(), window: this.windowAdapter);
-        Widget mouseHover()
-        {
-            return new WidgetsApp(null, new MouseHoverWidget(null), windowAdapter);
+        Widget mouseHover() {
+            return new WidgetsApp(home: new MouseHoverWidget(), window: this.windowAdapter);
         }
     }
 

Runtime/widgets/media_query.cs

+using System;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.widgets {
+    public enum Orientation {
+        portrait,
+        landscape
+    }
+
+    public class MediaQueryData : IEquatable<MediaQueryData> {
+        public MediaQueryData(
+            Size size = null,
+            double devicePixelRatio = 1.0,
+            double textScaleFactor = 1.0,
+            EdgeInsets viewInsets = null,
+            EdgeInsets padding = null,
+            bool alwaysUse24HourFormat = false,
+            bool accessibleNavigation = false,
+            bool invertColors = false,
+            bool disableAnimations = false,
+            bool boldText = false
+        ) {
+            this.size = size ?? Size.zero;
+            this.devicePixelRatio = devicePixelRatio;
+            this.textScaleFactor = textScaleFactor;
+            this.viewInsets = viewInsets ?? EdgeInsets.zero;
+            this.padding = padding ?? EdgeInsets.zero;
+            this.alwaysUse24HourFormat = alwaysUse24HourFormat;
+            this.accessibleNavigation = accessibleNavigation;
+            this.invertColors = invertColors;
+            this.disableAnimations = disableAnimations;
+            this.boldText = boldText;
+        }
+
+        public static MediaQueryData fromWindow(Window window) {
+            return new MediaQueryData(
+                size: window.physicalSize / window.devicePixelRatio,
+                devicePixelRatio: window.devicePixelRatio,
+                textScaleFactor: window.textScaleFactor,
+                viewInsets: EdgeInsets.fromWindowPadding(window.viewInsets, window.devicePixelRatio),
+                padding: EdgeInsets.fromWindowPadding(window.padding, window.devicePixelRatio)
+//                accessibleNavigation: window.accessibilityFeatures.accessibleNavigation,
+//                invertColors: window.accessibilityFeatures.invertColors,
+//                disableAnimations: window.accessibilityFeatures.disableAnimations,
+//                boldText: window.accessibilityFeatures.boldText,
+//                alwaysUse24HourFormat: window.alwaysUse24HourFormat
+            );
+        }
+
+        public readonly Size size;
+
+        public readonly double devicePixelRatio;
+
+        public readonly double textScaleFactor;
+
+        public readonly EdgeInsets viewInsets;
+
+        public readonly EdgeInsets padding;
+
+        public readonly bool alwaysUse24HourFormat;
+
+        public readonly bool accessibleNavigation;
+
+        public readonly bool invertColors;
+
+        public readonly bool disableAnimations;
+
+        public readonly bool boldText;
+
+        public Orientation orientation =>
+            this.size.width > this.size.height ? Orientation.landscape : Orientation.portrait;
+
+        public MediaQueryData copyWith(
+            Size size = null,
+            double? devicePixelRatio = null,
+            double? textScaleFactor = null,
+            EdgeInsets viewInsets = null,
+            EdgeInsets padding = null,
+            bool? alwaysUse24HourFormat = null,
+            bool? accessibleNavigation = null,
+            bool? invertColors = null,
+            bool? disableAnimations = null,
+            bool? boldText = null
+        ) {
+            return new MediaQueryData(
+                size: size ?? this.size,
+                devicePixelRatio: devicePixelRatio ?? this.devicePixelRatio,
+                textScaleFactor: textScaleFactor ?? this.textScaleFactor,
+                viewInsets: viewInsets ?? this.viewInsets,
+                padding: padding ?? this.padding,
+                alwaysUse24HourFormat: alwaysUse24HourFormat ?? this.alwaysUse24HourFormat,
+                accessibleNavigation: accessibleNavigation ?? this.accessibleNavigation,
+                invertColors: invertColors ?? this.invertColors,
+                disableAnimations: disableAnimations ?? this.disableAnimations,
+                boldText: boldText ?? this.boldText
+            );
+        }
+
+        public MediaQueryData removePadding(
+            bool removeLeft = false,
+            bool removeTop = false,
+            bool removeRight = false,
+            bool removeBottom = false
+        ) {
+            if (!(removeLeft || removeTop || removeRight || removeBottom)) {
+                return this;
+            }
+
+            return new MediaQueryData(
+                size: this.size,
+                devicePixelRatio: this.devicePixelRatio,
+                textScaleFactor: this.textScaleFactor,
+                padding: this.padding.copyWith(
+                    left: removeLeft ? (double?) 0.0 : null,
+                    top: removeTop ? (double?) 0.0 : null,
+                    right: removeRight ? (double?) 0.0 : null,
+                    bottom: removeBottom ? (double?) 0.0 : null
+                ),
+                viewInsets: this.viewInsets,
+                alwaysUse24HourFormat: this.alwaysUse24HourFormat,
+                disableAnimations: this.disableAnimations,
+                invertColors: this.invertColors,
+                accessibleNavigation: this.accessibleNavigation,
+                boldText: this.boldText
+            );
+        }
+
+        public MediaQueryData removeViewInsets(
+            bool removeLeft = false,
+            bool removeTop = false,
+            bool removeRight = false,
+            bool removeBottom = false
+        ) {
+            if (!(removeLeft || removeTop || removeRight || removeBottom)) {
+                return this;
+            }
+
+            return new MediaQueryData(
+                size: this.size,
+                devicePixelRatio: this.devicePixelRatio,
+                textScaleFactor: this.textScaleFactor,
+                padding: this.padding,
+                viewInsets: this.viewInsets.copyWith(
+                    left: removeLeft ? (double?) 0.0 : null,
+                    top: removeTop ? (double?) 0.0 : null,
+                    right: removeRight ? (double?) 0.0 : null,
+                    bottom: removeBottom ? (double?) 0.0 : null
+                ),
+                alwaysUse24HourFormat: this.alwaysUse24HourFormat,
+                disableAnimations: this.disableAnimations,
+                invertColors: this.invertColors,
+                accessibleNavigation: this.accessibleNavigation,
+                boldText: this.boldText
+            );
+        }
+
+        public bool Equals(MediaQueryData other) {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+            return Equals(this.size, other.size) && this.devicePixelRatio.Equals(other.devicePixelRatio) &&
+                   this.textScaleFactor.Equals(other.textScaleFactor) && Equals(this.viewInsets, other.viewInsets) &&
+                   Equals(this.padding, other.padding) && this.alwaysUse24HourFormat == other.alwaysUse24HourFormat &&
+                   this.accessibleNavigation == other.accessibleNavigation && this.invertColors == other.invertColors &&
+                   this.disableAnimations == other.disableAnimations && this.boldText == other.boldText;
+        }
+
+        public override bool Equals(object obj) {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != this.GetType()) return false;
+            return this.Equals((MediaQueryData) obj);
+        }
+
+        public override int GetHashCode() {
+            unchecked {
+                var hashCode = (this.size != null ? this.size.GetHashCode() : 0);
+                hashCode = (hashCode * 397) ^ this.devicePixelRatio.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.textScaleFactor.GetHashCode();
+                hashCode = (hashCode * 397) ^ (this.viewInsets != null ? this.viewInsets.GetHashCode() : 0);
+                hashCode = (hashCode * 397) ^ (this.padding != null ? this.padding.GetHashCode() : 0);
+                hashCode = (hashCode * 397) ^ this.alwaysUse24HourFormat.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.accessibleNavigation.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.invertColors.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.disableAnimations.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.boldText.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        public static bool operator ==(MediaQueryData left, MediaQueryData right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(MediaQueryData left, MediaQueryData right) {
+            return !Equals(left, right);
+        }
+
+        public override string ToString() {
+            return $"{this.GetType()}(" +
+                   $"size: {this.size}, " +
+                   $"devicePixelRatio: {this.devicePixelRatio:F1}, " +
+                   $"textScaleFactor: {this.textScaleFactor:F1}, " +
+                   $"padding: {this.padding}, " +
+                   $"viewInsets: {this.viewInsets}, " +
+                   $"alwaysUse24HourFormat: {this.alwaysUse24HourFormat}, " +
+                   $"accessibleNavigation: {this.accessibleNavigation}" +
+                   $"disableAnimations: {this.disableAnimations}" +
+                   $"invertColors: {this.invertColors}" +
+                   $"boldText: {this.boldText}" +
+                   ")";
+        }
+    }
+
+    public class MediaQuery : InheritedWidget {
+        public MediaQuery(
+            Key key = null,
+            MediaQueryData data = null,
+            Widget child = null
+        ) : base(key, child) {
+            D.assert(child != null);
+            D.assert(data != null);
+            this.data = data;
+        }
+
+        public static MediaQuery removePadding(
+            Key key = null,
+            BuildContext context = null,
+            bool removeLeft = false,
+            bool removeTop = false,
+            bool removeRight = false,
+            bool removeBottom = false,
+            Widget child = null
+        ) {
+            D.assert(context != null);
+            return new MediaQuery(
+                key: key,
+                data: MediaQuery.of(context).removePadding(
+                    removeLeft: removeLeft,
+                    removeTop: removeTop,
+                    removeRight: removeRight,
+                    removeBottom: removeBottom
+                ),
+                child: child
+            );
+        }
+
+        public static MediaQuery removeViewInsets(
+            Key key = null,
+            BuildContext context = null,
+            bool removeLeft = false,
+            bool removeTop = false,
+            bool removeRight = false,
+            bool removeBottom = false,
+            Widget child = null
+        ) {
+            D.assert(context != null);
+            return new MediaQuery(
+                key: key,
+                data: MediaQuery.of(context).removeViewInsets(
+                    removeLeft: removeLeft,
+                    removeTop: removeTop,
+                    removeRight: removeRight,
+                    removeBottom: removeBottom
+                ),
+                child: child
+            );
+        }
+
+        public readonly MediaQueryData data;
+
+        public static MediaQueryData of(BuildContext context, bool nullOk = false) {
+            D.assert(context != null);
+            MediaQuery query = (MediaQuery) context.inheritFromWidgetOfExactType(typeof(MediaQuery));
+            if (query != null) {
+                return query.data;
+            }
+
+            if (nullOk) {
+                return null;
+            }
+
+            throw new UIWidgetsError(
+                "MediaQuery.of() called with a context that does not contain a MediaQuery.\n" +
+                "No MediaQuery ancestor could be found starting from the context that was passed " +
+                "to MediaQuery.of(). This can happen because you do not have a WidgetsApp or " +
+                "MaterialApp widget (those widgets introduce a MediaQuery), or it can happen " +
+                "if the context you use comes from a widget above those widgets.\n" +
+                "The context used was:\n" +
+                $"  {context}");
+        }
+
+        public static double textScaleFactorOf(BuildContext context) {
+            return MediaQuery.of(context, nullOk: true)?.textScaleFactor ?? 1.0;
+        }
+
+        static bool boldTextOverride(BuildContext context) {
+            return MediaQuery.of(context, nullOk: true)?.boldText ?? false;
+        }
+
+        public override bool updateShouldNotify(InheritedWidget oldWidget) =>
+            this.data != ((MediaQuery) oldWidget).data;
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new DiagnosticsProperty<MediaQueryData>("data", this.data, showName: false));
+        }
+    }
+}

Runtime/widgets/media_query.cs.meta

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