Merge branches 'kgdev' and 'master' of gitlab.cds.internal.unity3d.com:upm-packages/ui-widgets/com.unity.uiwidgets into kgdev

# Conflicts:
#	Runtime/ui/painting/painting.cs

.editorconfig

 
 # don't use 'private' whenever possible
 csharp_default_private_modifier=implicit
+csharp_default_internal_modifier=implicit
 
 
 # not requirement for converting named arguments into positioned arguments whenever possible

Runtime/animation/animation.cs

             D.assert(icon != null);
             return icon;
         }
+
+        public Animation<U> drive<U>(Animatable<U> child) {
+            D.assert(this is Animation<double>);
+            return child.animate(this as Animation<double>);
+        }
-}
+}

Runtime/animation/tween.cs

             this.end = end;
         }
 
-        public readonly T begin;
+        public T begin;
-        public readonly T end;
+        public T end;
 
         public abstract T lerp(double t);
 
             if (ReferenceEquals(null, other)) {
                 return false;
             }
+
+
             return EqualityComparer<T>.Default.Equals(this.begin, other.begin) &&
                    EqualityComparer<T>.Default.Equals(this.end, other.end);
         }
                 return false;
             }
+
+
+
             return this.Equals((Tween<T>) obj);
         }
 
     }
 
     public class DoubleTween : Tween<double> {
-        public DoubleTween(int begin, int end) : base(begin: begin, end: end) {
+        public DoubleTween(double begin, double end) : base(begin: begin, end: end) {
         }
 
         public override double lerp(double t) {
             return (this.begin + (this.end - this.begin) * t);
         }
     }
-    
+
     public class CurveTween : Animatable<double> {
         public CurveTween(Curve curve = null) {
             D.assert(curve != null);
             return $"{this.GetType()}(curve: {this.curve})";
         }
     }
-}
+}

Runtime/painting/text_style.cs

             );
         }
 
+
+        public TextStyle apply(
+            Color color = null,
+            TextDecoration decoration = null,
+            Color decorationColor = null,
+            TextDecorationStyle? decorationStyle = null,
+            string fontFamily = null,
+            double fontSizeFactor = 1.0,
+            double fontSizeDelta = 0.0,
+            int fontWeightDelta = 0,
+            double letterSpacingFactor = 1.0,
+            double letterSpacingDelta = 0.0,
+            double wordSpacingFactor = 1.0,
+            double wordSpacingDelta = 0.0,
+            double heightFactor = 1.0,
+            double heightDelta = 0.0
+        ) {
+            D.assert(this.fontSize != null || (fontSizeFactor == 1.0 && fontSizeDelta == 0.0));
+            D.assert(this.fontWeight != null || fontWeightDelta == 0.0);
+            D.assert(this.letterSpacing != null || (letterSpacingFactor == 1.0 && letterSpacingDelta == 0.0));
+            D.assert(this.wordSpacing != null || (wordSpacingFactor == 1.0 && wordSpacingDelta == 0.0));
+            D.assert(heightFactor != null || (heightFactor == 1.0 && heightDelta == 0.0));
+
+            string modifiedDebugLabel = "";
+            D.assert(() => {
+                if (this.debugLabel != null)
+                    modifiedDebugLabel = this.debugLabel + ".apply";
+                return true;
+            });
+
+            return new TextStyle(
+                inherit: this.inherit,
+                color: color ?? this.color,
+                fontFamily: fontFamily ?? this.fontFamily,
+                fontSize: this.fontSize == null ? null : this.fontSize * fontSizeFactor + fontSizeDelta,
+                fontWeight: this.fontWeight == null ? null : this.fontWeight,
+                fontStyle: this.fontStyle,
+                letterSpacing: this.letterSpacing == null
+                    ? null
+                    : this.letterSpacing * letterSpacingFactor + letterSpacingDelta,
+                wordSpacing: this.wordSpacing == null ? null : this.wordSpacing * wordSpacingFactor + wordSpacingDelta,
+                textBaseline: this.textBaseline,
+                height: this.height == null ? null : this.height * heightFactor + heightDelta,
+                background: this.background,
+                decoration: decoration ?? this.decoration,
+                decorationColor: decorationColor ?? this.decorationColor,
+                decorationStyle: decorationStyle ?? this.decorationStyle,
+                debugLabel: modifiedDebugLabel
+            );
+        }
+
         public TextStyle merge(TextStyle other) {
             if (other == null) {
                 return this;
             );
         }
 
-        public TextStyle copyWith(Color color,
-            string fontFamily,
-            double? fontSize,
-            FontWeight? fontWeight,
-            FontStyle? fontStyle,
-            double? letterSpacing,
-            double? wordSpacing,
+        public TextStyle copyWith(Color color = null,
+            string fontFamily = null,
+            double? fontSize = null,
+            FontWeight? fontWeight = null,
+            FontStyle? fontStyle = null,
+            double? letterSpacing = null,
+            double? wordSpacing = null,
             TextBaseline? textBaseline = null,
             double? height = null,
             Paint background = null,
             );
         }
 
+        public static TextStyle lerp(TextStyle a, TextStyle b, double t) {
+            D.assert(t != null);
+            D.assert(a == null || b == null || a.inherit == b.inherit);
+            if (a == null && b == null) {
+                return null;
+            }
+
+            string lerpDebugLabel = "";
+            D.assert(() => {
+                lerpDebugLabel = "lerp" + (a?.debugLabel ?? _kDefaultDebugLabel) + "-" + t + "-" +
+                                 (b?.debugLabel ?? _kDefaultDebugLabel);
+                return true;
+            });
+
+            if (a == null) {
+                return new TextStyle(
+                    inherit: b.inherit,
+                    color: Color.lerp(null, b.color, t),
+                    fontFamily: t < 0.5 ? null : b.fontFamily,
+                    fontSize: t < 0.5 ? null : b.fontSize,
+                    fontWeight: t < 0.5 ? null : b.fontWeight,
+                    fontStyle: t < 0.5 ? null : b.fontStyle,
+                    letterSpacing: t < 0.5 ? null : b.letterSpacing,
+                    wordSpacing: t < 0.5 ? null : b.wordSpacing,
+                    textBaseline: t < 0.5 ? null : b.textBaseline,
+                    height: t < 0.5 ? null : b.height,
+                    background: t < 0.5 ? null : b.background,
+                    decoration: t < 0.5 ? null : b.decoration,
+                    decorationColor: Color.lerp(null, b.decorationColor, t),
+                    decorationStyle: t < 0.5 ? null : b.decorationStyle,
+                    debugLabel: lerpDebugLabel
+                );
+            }
+
+            if (b == null) {
+                return new TextStyle(
+                    inherit: a.inherit,
+                    color: Color.lerp(a.color, null, t),
+                    fontFamily: t < 0.5 ? a.fontFamily : null,
+                    fontSize: t < 0.5 ? a.fontSize : null,
+                    fontWeight: t < 0.5 ? a.fontWeight : null,
+                    fontStyle: t < 0.5 ? a.fontStyle : null,
+                    letterSpacing: t < 0.5 ? a.letterSpacing : null,
+                    wordSpacing: t < 0.5 ? a.wordSpacing : null,
+                    textBaseline: t < 0.5 ? a.textBaseline : null,
+                    height: t < 0.5 ? a.height : null,
+                    background: t < 0.5 ? a.background : null,
+                    decoration: t < 0.5 ? a.decoration : null,
+                    decorationColor: Color.lerp(a.decorationColor, null, t),
+                    decorationStyle: t < 0.5 ? a.decorationStyle : null,
+                    debugLabel: lerpDebugLabel
+                );
+            }
+
+            return new TextStyle(
+                inherit: b.inherit,
+                color: Color.lerp(a.color, b.color, t),
+                fontFamily: t < 0.5 ? a.fontFamily : b.fontFamily,
+                fontSize: MathUtils.lerpNullableDouble(a.fontSize ?? b.fontSize, b.fontSize ?? a.fontSize, t),
+                fontWeight: t < 0.5 ? a.fontWeight : b.fontWeight,
+                fontStyle: t < 0.5 ? a.fontStyle : b.fontStyle,
+                letterSpacing: MathUtils.lerpNullableDouble(a.letterSpacing ?? b.letterSpacing,
+                    b.letterSpacing ?? a.letterSpacing, t),
+                wordSpacing: MathUtils.lerpNullableDouble(a.wordSpacing ?? b.wordSpacing,
+                    b.wordSpacing ?? a.wordSpacing, t),
+                textBaseline: t < 0.5 ? a.textBaseline : b.textBaseline,
+                height: MathUtils.lerpNullableDouble(a.height ?? b.height, b.height ?? a.height, t),
+                background: t < 0.5 ? a.background : b.background,
+                decoration: t < 0.5 ? a.decoration : b.decoration,
+                decorationColor: Color.lerp(a.decorationColor, b.decorationColor, t),
+                decorationStyle: t < 0.5 ? a.decorationStyle : b.decorationStyle,
+                debugLabel: lerpDebugLabel
+            );
+        }
+
         public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
             base.debugFillProperties(properties);
 
                 if (this.decoration != null) {
                     decorationDescription.Add("$decoration");
                 }
+
                 D.assert(decorationDescription.isNotEmpty);
                 styles.Add(new MessageProperty("decoration", string.Join(" ", decorationDescription.ToArray())));
             }
             if (ReferenceEquals(null, other)) {
                 return false;
             }
+
+
             return this.inherit == other.inherit && Equals(this.color, other.color) &&
                    this.fontSize.Equals(other.fontSize) && this.fontWeight == other.fontWeight &&
                    this.fontStyle == other.fontStyle && this.letterSpacing.Equals(other.letterSpacing) &&
             if (ReferenceEquals(null, obj)) {
                 return false;
             }
+
+
+
             return this.Equals((TextStyle) obj);
         }
 
             return this.GetType().FullName;
         }
     }
-}
+}

Runtime/rendering/box.cs

             );
         }
 
+        public static BoxConstraints lerp(BoxConstraints a, BoxConstraints b, double t) {
+            if (a == null && b == null)
+                return null;
+            if (a == null)
+                return b * t;
+            if (b == null)
+                return a * (1.0 - t);
+            D.assert(a.debugAssertIsValid());
+            D.assert(b.debugAssertIsValid());
+            D.assert(
+                (a.minWidth.isFinite() && b.minWidth.isFinite()) ||
+                (a.minWidth == double.PositiveInfinity && b.minWidth == double.PositiveInfinity),
+                "Cannot interpolate between finite constraints and unbounded constraints.");
+            D.assert(
+                (a.maxWidth.isFinite() && b.maxWidth.isFinite()) ||
+                (a.maxWidth == double.PositiveInfinity && b.maxWidth == double.PositiveInfinity),
+                "Cannot interpolate between finite constraints and unbounded constraints.");
+            D.assert(
+                (a.minHeight.isFinite() && b.minHeight.isFinite()) ||
+                (a.minHeight == double.PositiveInfinity && b.minHeight == double.PositiveInfinity),
+                "Cannot interpolate between finite constraints and unbounded constraints.");
+            D.assert(
+                (a.maxHeight.isFinite() && b.maxHeight.isFinite()) ||
+                (a.maxHeight == double.PositiveInfinity && b.maxHeight == double.PositiveInfinity),
+                "Cannot interpolate between finite constraints and unbounded constraints.");
+            return new BoxConstraints(
+                minWidth: a.minWidth.isFinite()
+                    ? MathUtils.lerpDouble(a.minWidth, b.minWidth, t)
+                    : double.PositiveInfinity,
+                maxWidth: a.maxWidth.isFinite()
+                    ? MathUtils.lerpDouble(a.maxWidth, b.maxWidth, t)
+                    : double.PositiveInfinity,
+                minHeight: a.minHeight.isFinite()
+                    ? MathUtils.lerpDouble(a.minHeight, b.minHeight, t)
+                    : double.PositiveInfinity,
+                maxHeight: a.maxHeight.isFinite()
+                    ? MathUtils.lerpDouble(a.maxHeight, b.maxHeight, t)
+                    : double.PositiveInfinity
+            );
+        }
+
         public override bool isNormalized {
             get {
                 return this.minWidth >= 0.0 &&
                     string whichFields;
                     if (affectedFieldsList.Count > 2) {
                         whichFields = string.Join(", ", affectedFieldsList.ToArray());
-                    } else if (affectedFieldsList.Count == 2) {
+                    }
+                    else if (affectedFieldsList.Count == 2) {
-                    } else {
+                    }
+                    else {
                         whichFields = affectedFieldsList.Single();
                     }
 
             if (ReferenceEquals(null, other)) {
                 return false;
             }
+
+
             return this.minWidth.Equals(other.minWidth)
                    && this.maxWidth.Equals(other.maxWidth)
                    && this.minHeight.Equals(other.minHeight)
             if (ReferenceEquals(null, obj)) {
                 return false;
             }
+
+
+
             return this.Equals((BoxConstraints) obj);
         }
 
             if (ReferenceEquals(null, other)) {
                 return false;
             }
+
+
             return this.dimension == other.dimension && this.argument.Equals(other.argument);
         }
 
             }
+
+
+
             return this.Equals((_IntrinsicDimensionsCacheEntry) obj);
         }
 
                         D.assert(this.sizedByParent);
                         violation = "It appears that the size setter was called from performLayout().";
                         hint = "";
-                    } else {
+                    }
+                    else {
                         violation =
                             "The size setter was called from outside layout (neither performResize() nor performLayout() were being run for this object).";
                         if (this.owner != null && this.owner.debugDoingLayout) {
                     if (this.sizedByParent) {
                         contract =
                             "Because this RenderBox has sizedByParent set to true, it must set its size in performResize().";
-                    } else {
+                    }
+                    else {
                         contract =
                             "Because this RenderBox has sizedByParent set to false, it must set its size in performLayout().";
                     }
                     if (this.sizedByParent) {
                         contract =
                             "Because this RenderBox has sizedByParent set to true, it must set its size in performResize().\n";
-                    } else {
+                    }
+                    else {
                         contract =
                             "Because this RenderBox has sizedByParent set to false, it must set its size in performLayout().\n";
                     }
                 if (D.debugPaintPointersEnabled) {
                     if (evt is PointerDownEvent) {
                         this._debugActivePointers += 1;
-                    } else if (evt is PointerUpEvent || evt is PointerCancelEvent) {
+                    }
+                    else if (evt is PointerUpEvent || evt is PointerCancelEvent) {
                         this._debugActivePointers -= 1;
                     }
 
                     candidate += childParentData.offset.dy;
                     if (result != null) {
                         result = Math.Min(result.Value, candidate.Value);
-                    } else {
+                    }
+                    else {
                         result = candidate;
                     }
                 }
             return result;
         }
     }
-}
+}

Runtime/rendering/proxy_box.cs

             if (this.child != null) {
                 this.child.layout(this._additionalConstraints.enforce(this.constraints), parentUsesSize: true);
                 this.size = this.child.size;
-            } else {
+            }
+            else {
                 this.size = this._additionalConstraints.enforce(this.constraints).constrain(Size.zero);
             }
         }
             if (this.child != null) {
                 this.child.layout(this._limitConstraints(this.constraints), parentUsesSize: true);
                 this.size = this.constraints.constrain(this.child.size);
-            } else {
+            }
+            else {
                 this.size = this._limitConstraints(this.constraints).constrain(Size.zero);
             }
         }
             if (!double.IsInfinity(height)) {
                 return height * this._aspectRatio;
             }
+
+
             return 0.0;
         }
 
             }
+
             if (this.child != null) {
                 return this.child.getMaxIntrinsicWidth(height);
             }
             if (!double.IsInfinity(width)) {
                 return width / this._aspectRatio;
             }
+
             if (this.child != null) {
                 return this.child.getMinIntrinsicHeight(width);
             }
             if (!double.IsInfinity(width)) {
                 return width / this._aspectRatio;
             }
+
             if (this.child != null) {
                 return this.child.getMaxIntrinsicHeight(width);
             }
         }
 
         double _opacity;
+
         public double opacity {
             get { return this._opacity; }
             set {
     }
 
     public class RenderAnimatedOpacity : RenderProxyBox {
-
-                RenderBox child = null
+            RenderBox child = null
         ) : base(child) {
             D.assert(opacity != null);
             this.opacity = opacity;
         int _alpha;
-        
+
-        
+
-        public Animation<double>  opacity {
+
+        public Animation<double> opacity {
             get => this._opacity;
             set {
                 D.assert(value != null);
                 this._updateOpacity();
             }
         }
-        
-        
+
+
         public override void attach(object owner) {
             base.attach(owner);
             this._opacity.addListener(this._updateOpacity);
             this._alpha = RenderOpacity._getAlphaFromOpacity(this._opacity.value.clamp(0.0, 1.0));
             if (oldAlpha != this._alpha) {
                 bool didNeedCompositing = this._currentlyNeedsCompositing;
-                this._currentlyNeedsCompositing = this._alpha > 0 &&this. _alpha < 255;
+                this._currentlyNeedsCompositing = this._alpha > 0 && this._alpha < 255;
-        
+
         public override void paint(PaintingContext context, Offset offset) {
             if (this.child != null) {
                 if (this._alpha == 0)
                     return;
                 }
+
-        
+
-         }
+        }
+    }
+
+
+    public abstract class CustomClipper<T> {
+        public CustomClipper(Listenable reclip = null) {
+            this._reclip = reclip;
+        }
+
+        public readonly Listenable _reclip;
+
+        public abstract T getClip(Size size);
+
+        public Rect getApproximateClipRect(Size size) => Offset.zero & size;
+
+        public abstract bool shouldReclip(CustomClipper<T> oldClipper);
+
+        public string toString() => this.GetType() + "";
+    }
+
+    public class ShapeBorderClipper : CustomClipper<Path> {
+        public ShapeBorderClipper(
+            ShapeBorder shape = null) {
+            D.assert(shape != null);
+            this.shape = shape;
+        }
+
+        public readonly ShapeBorder shape;
+
+        public override Path getClip(Size size) {
+            return this.shape.getOuterPath(Offset.zero & size);
+        }
+
+        public override bool shouldReclip(CustomClipper<Path> oldClipper) {
+            if (oldClipper.GetType() != this.GetType())
+                return true;
+            ShapeBorderClipper typedOldClipper = (ShapeBorderClipper) oldClipper;
+            return typedOldClipper.shape != this.shape;
+        }
+    }
+
+    public abstract class _RenderCustomClip<T> : RenderProxyBox where T : class {
+        protected _RenderCustomClip(
+            RenderBox child = null,
+            CustomClipper<T> clipper = null,
+            Clip clipBehavior = Clip.antiAlias) : base(child: child) {
+            this.clipBehavior = clipBehavior;
+            this._clipper = clipper;
+        }
+
+        public CustomClipper<T> clipper {
+            get { return this._clipper; }
+            set {
+                if (this._clipper == value)
+                    return;
+
+                CustomClipper<T> oldClipper = this._clipper;
+                this._clipper = value;
+                D.assert(value != null || oldClipper != null);
+                if (value == null || oldClipper == null ||
+                    value.GetType() != oldClipper.GetType() ||
+                    value.shouldReclip(oldClipper)) {
+                    this._markNeedsClip();
+                }
+
+                if (this.attached) {
+                    oldClipper?._reclip?.removeListener(this._markNeedsClip);
+                    value?._reclip?.addListener(this._markNeedsClip);
+                }
+            }
+        }
+
+        protected CustomClipper<T> _clipper;
+
+        public override void attach(object owner) {
+            base.attach(owner);
+            this._clipper?._reclip?.addListener(this._markNeedsClip);
+        }
+
+        public override void detach() {
+            this._clipper?._reclip?.removeListener(this._markNeedsClip);
+            base.detach();
+        }
+
+        protected void _markNeedsClip() {
+            this._clip = null;
+            this.markNeedsPaint();
+        }
+
+        protected abstract T _defaultClip { get; }
+        protected T _clip;
+
+        public readonly Clip clipBehavior;
+
+        protected override void performLayout() {
+            Size oldSize = this.hasSize ? this.size : null;
+            base.performLayout();
+            if (oldSize != this.size)
+                this._clip = null;
+        }
+
+        protected void _updateClip() {
+            this._clip = this._clip ?? this._clipper?.getClip(this.size) ?? this._defaultClip;
+        }
+
+        public override Rect describeApproximatePaintClip(RenderObject child) {
+            return this._clipper?.getApproximateClipRect(this.size) ?? Offset.zero & this.size;
+        }
+
+        Paint _debugPaint;
+        TextPainter _debugText;
+
+        protected override void debugPaintSize(PaintingContext context, Offset offset) {
+            D.assert(() => {
+//                if (this._debugPaint == null) {
+//                this._debugPaint = new Paint();
+//                this._debugPaint.shader = Gradient.linear(
+//                    new Offset(0.0, 0.0),
+//                    new Offset(10.0, 10.0),
+//                    new Color(0x00000000),
+//                    new Color(0xFFFF00FF),
+//                    TileMode.repeated);
+//                this._debugPaint.strokeWidth = 2.0;
+//                this._debugPaint.style = PaintingStyle.stroke;
+//                }
+//                if (this._debugText == null) {
+//                this._debugText = new TextPainter(
+//                                      text: new TextSpan(
+//                                          text: "x",
+//                                          style: new TextStyle(
+//                                              color: new Color(0xFFFF00FF),
+//                                              fontSize: 14.0)
+//                                          ));
+//                this._debugText.layout();
+//                }
+                return true;
+            });
+        }
+    }
+
+    public abstract class _RenderPhysicalModelBase<T> : _RenderCustomClip<T> where T : class {
+        public _RenderPhysicalModelBase(
+            RenderBox child = null,
+            double? elevation = null,
+            Color color = null,
+            Color shadowColor = null,
+            Clip clipBehavior = Clip.none,
+            CustomClipper<T> clipper = null
+        ) : base(child: child, clipBehavior: clipBehavior, clipper: clipper) {
+            D.assert(elevation != null);
+            D.assert(color != null);
+            D.assert(shadowColor != null);
+            this._elevation = elevation ?? 0.0;
+            this._color = color;
+            this._shadowColor = shadowColor;
+        }
+
+        public double elevation {
+            get { return this._elevation; }
+            set {
+                if (this.elevation == value)
+                    return;
+                bool didNeedCompositing = this.alwaysNeedsCompositing;
+                this._elevation = value;
+                if (didNeedCompositing != this.alwaysNeedsCompositing)
+                    this.markNeedsCompositingBitsUpdate();
+                this.markNeedsPaint();
+            }
+        }
+
+        double _elevation;
+
+        public Color shadowColor {
+            get { return this._shadowColor; }
+            set {
+                D.assert(value != null);
+                if (this.shadowColor == value)
+                    return;
+                this._shadowColor = value;
+                this.markNeedsPaint();
+            }
+        }
+
+        Color _shadowColor;
+
+        public Color color {
+            get { return this._color; }
+            set {
+                D.assert(value != null);
+                if (this.color == value)
+                    return;
+                this._color = value;
+                this.markNeedsPaint();
+            }
+        }
+
+        Color _color;
+
+        static Paint _transparentPaint => new Paint {color = new Color(0x00000000)};
+
+        protected override bool alwaysNeedsCompositing => this._elevation != 0.0;
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder description) {
+            base.debugFillProperties(description);
+            description.add(new DoubleProperty("elevation", this.elevation));
+            description.add(new DiagnosticsProperty<Color>("color", this.color));
+            description.add(new DiagnosticsProperty<Color>("shadowColor", this.shadowColor));
+        }
+    }
+
+    public class RenderPhysicalModel : _RenderPhysicalModelBase<RRect> {
+        public RenderPhysicalModel(
+            RenderBox child = null,
+            BoxShape shape = BoxShape.rectangle,
+            Clip clipBehavior = Clip.none,
+            BorderRadius borderRadius = null,
+            double elevation = 0.0,
+            Color color = null,
+            Color shadowColor = null
+        ) : base(clipBehavior: clipBehavior, child: child, elevation: elevation, color: color,
+            shadowColor: shadowColor ?? new Color(0xFF000000)) {
+            D.assert(color != null);
+            this._shape = shape;
+            this._borderRadius = borderRadius;
+        }
+
+        public BoxShape shape {
+            get { return this._shape; }
+            set {
+                if (this.shape == value)
+                    return;
+                this._shape = value;
+                this._markNeedsClip();
+            }
+        }
+
+        BoxShape _shape;
+
+        public BorderRadius borderRadius {
+            get { return this._borderRadius; }
+            set {
+                if (this.borderRadius == value)
+                    return;
+                this._borderRadius = value;
+                this._markNeedsClip();
+            }
+        }
+
+        BorderRadius _borderRadius;
+
+        protected override RRect _defaultClip {
+            get {
+                D.assert(this.hasSize);
+                switch (this._shape) {
+                    case BoxShape.rectangle:
+                        return (this.borderRadius ?? BorderRadius.zero).toRRect(Offset.zero & this.size);
+                    case BoxShape.circle:
+                        Rect rect = Offset.zero & this.size;
+                        return RRect.fromRectXY(rect, rect.width / 2, rect.height / 2);
+                }
+
+                return null;
+            }
+        }
+
+        public override bool hitTest(HitTestResult result, Offset position = null) {
+            if (this._clipper != null) {
+                this._updateClip();
+                D.assert(this._clip != null);
+                if (!this._clip.contains(position))
+                    return false;
+            }
+
+            return base.hitTest(result, position: position);
+        }
+
+        //todo:xingwei.zhu: implementation shadow + compositeLayer
+        public override void paint(PaintingContext context, Offset offset) {
+            if (this.child != null) {
+                this._updateClip();
+                RRect offsetRRect = this._clip.shift(offset);
+                Rect offsetBounds = offsetRRect.outerRect;
+                Path offsetRRectAsPath = new Path();
+                offsetRRectAsPath.addRRect(offsetRRect);
+
+                Canvas canvas = context.canvas;
+                if (this.elevation != 0.0) {
+                    //draw Shadow
+                    /*canvas.drawRect(
+                        offsetBounds.inflate(20.0),
+                        _RenderPhysicalModelBase<RRect>._transparentPaint
+                    );
+                    canvas.drawShadow(
+                        offsetRRectAsPath,
+                        this.shadowColor,
+                        this.elevation,
+                        this.color.alpha != 0xFF
+                    );*/
+                }
+
+                Paint paint = new Paint {color = this.color};
+                canvas.drawRRect(offsetRRect, paint);
+                context.clipRRectAndPaint(offsetRRect, this.clipBehavior, offsetBounds,
+                    () => base.paint(context, offset));
+                D.assert(context.canvas == canvas, "canvas changed even though needsCompositing was false");
+            }
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder description) {
+            base.debugFillProperties(description);
+            description.add(new DiagnosticsProperty<BoxShape>("shape", this.shape));
+            description.add(new DiagnosticsProperty<BorderRadius>("borderRadius", this.borderRadius));
+        }
+    }
+
+
+    public class RenderPhysicalShape : _RenderPhysicalModelBase<Path> {
+        public RenderPhysicalShape(
+            RenderBox child = null,
+            CustomClipper<Path> clipper = null,
+            Clip clipBehavior = Clip.none,
+            double elevation = 0.0,
+            Color color = null,
+            Color shadowColor = null
+        ) : base(child: child,
+            elevation = elevation,
+            color: color,
+            shadowColor: shadowColor ?? new Color(0xFF000000),
+            clipper: clipper,
+            clipBehavior: clipBehavior) {
+            D.assert(clipper != null);
+            D.assert(color != null);
+        }
+
+        protected override Path _defaultClip {
+            get {
+                Path path = new Path();
+                path.addRect(Offset.zero & this.size);
+                return path;
+            }
+        }
+
+        public override bool hitTest(HitTestResult result, Offset position = null) {
+            if (this._clipper != null) {
+                this._updateClip();
+                D.assert(this._clip != null);
+                if (!this._clip.contains(position))
+                    return false;
+            }
+
+            return base.hitTest(result, position: position);
+        }
+
+        //todo:xingwei.zhu: implementation shadow + compositeLayer
+        public override void paint(PaintingContext context, Offset offset) {
+            if (this.child != null) {
+                this._updateClip();
+                Rect offsetBounds = offset & this.size;
+                Path offsetPath = new Path();
+                offsetPath.addPath(this._clip, offset);
+
+                Canvas canvas = context.canvas;
+//                if (this.elevation != 0.0 && paintShadows) {
+//                    canvas.drawRect(
+//                        offsetBounds.inflate(20.0),
+//                        _RenderPhysicalModelBase<Path>._transparentPaint
+//                    );
+//                    canvas.drawShadow(
+//                        offsetPath,
+//                        this.shadowColor,
+//                        this.elevation,
+//                        this.color.alpha != 0xFF,
+//                    );
+//                }
+                Paint paint = new Paint {color = this.color, style = PaintingStyle.fill};
+                canvas.drawPath(offsetPath, paint);
+                context.clipPathAndPaint(offsetPath, this.clipBehavior,
+                    offsetBounds, () => base.paint(context, offset));
+                D.assert(context.canvas == canvas, "canvas changed even though needsCompositing was false");
+            }
+        }
+
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder description) {
+            base.debugFillProperties(description);
+            description.add(new DiagnosticsProperty<CustomClipper<Path>>("clipper", this.clipper));
+        }
     }
 
     public enum DecorationPosition {
         }
 
         public void rotateZ(double degrees) {
-            this._transform.preRotate((float)degrees);
+            this._transform.preRotate((float) degrees);
             this.markNeedsPaint();
         }
 
 
                 Offset translation = null;
                 if (resolvedAlignment != null) {
-                    translation = resolvedAlignment.alongSize(this.size);                    
+                    translation = resolvedAlignment.alongSize(this.size);
                     result.preTranslate((float) translation.dx, (float) translation.dy);
                 }
 
 
                 if (childOffset == null) {
                     context.pushTransform(this.needsCompositing, offset, transform, base.paint);
-                } else {
+                }
+                else {
                     base.paint(context, offset + childOffset);
                 }
             }
     }
 
     public class RenderFractionalTranslation : RenderProxyBox {
-
         public RenderFractionalTranslation(
             Offset translation = null,
             bool transformHitTests = true,
                 this.markNeedsPaint();
             }
         }
+
-        
+
-        
+
         protected override bool hitTestChildren(HitTestResult result, Offset position) {
             D.assert(!this.debugNeedsLayout);
             if (this.transformHitTests) {
                 );
             }
+
-        
+
         public override void paint(PaintingContext context, Offset offset) {
             D.assert(!this.debugNeedsLayout);
             if (this.child != null) {
                 ));
             }
         }
-        
-       public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
-            transform.preTranslate((float)(this.translation.dx * this.size.width), 
-                            (float)(this.translation.dy * this.size.height));
+
+        public override void applyPaintTransform(RenderObject child, Matrix3 transform) {
+            transform.preTranslate((float) (this.translation.dx * this.size.width),
+                (float) (this.translation.dy * this.size.height));
+        }
-       }
-       
-       public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
-           base.debugFillProperties(properties);
-           properties.add(new DiagnosticsProperty<Offset>("translation", this.translation));
-           properties.add(new DiagnosticsProperty<bool>("transformHitTests", this.transformHitTests));
-       }
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new DiagnosticsProperty<Offset>("translation", this.translation));
+            properties.add(new DiagnosticsProperty<bool>("transformHitTests", this.transformHitTests));
+        }
     }
 
     public delegate void PointerDownEventListener(PointerDownEvent evt);
             if (this.onPointerDown != null) {
                 listeners.Add("down");
             }
+
+
+
+
+
+
+
             if (listeners.isEmpty()) {
                 listeners.Add("<none>");
             }
             D.assert(() => {
                 if (includedParent && includedChild) {
                     this._debugSymmetricPaintCount += 1;
-                } else {
+                }
+                else {
                     this._debugAsymmetricPaintCount += 1;
                 }
 
                 inReleaseMode = false;
                 if (this.debugSymmetricPaintCount + this.debugAsymmetricPaintCount == 0) {
                     properties.add(new MessageProperty("usefulness ratio", "no metrics collected yet (never painted)"));
-                } else {
+                }
+                else {
                     double fraction = (double) this.debugAsymmetricPaintCount /
                                       (this.debugSymmetricPaintCount + this.debugAsymmetricPaintCount);
 
-                    } else if (fraction > 0.9) {
+                    }
+                    else if (fraction > 0.9) {
-                    } else if (fraction > 0.5) {
+                    }
+                    else if (fraction > 0.5) {
-                    } else if (fraction > 0.30) {
+                    }
+                    else if (fraction > 0.30) {
-                    } else if (fraction > 0.1) {
+                    }
+                    else if (fraction > 0.1) {
-                    } else if (this.debugAsymmetricPaintCount == 0) {
+                    }
+                    else if (this.debugAsymmetricPaintCount == 0) {
-                    } else {
+                    }
+                    else {
                         diagnosis = "this repaint boundary is not very effective and should probably be removed";
                     }
 
 
     public class RenderOffstage : RenderProxyBox {
         public RenderOffstage(bool offstage = true,
-            RenderBox child = null): base(child) {
+            RenderBox child = null) : base(child) {
             this._offstage = offstage;
         }
 
                 this.markNeedsLayoutForSizedByParentChange();
             }
         }
+
-        
+
-        
-        
+
+
         protected override double computeMaxIntrinsicWidth(double height) {
             if (this.offstage)
                 return 0.0;
         protected override void performLayout() {
             if (this.offstage) {
                 this.child?.layout(this.constraints);
-            } else {
+            }
+            else {
                 base.performLayout();
             }
         }
         }
-    
+
-    
-    
+
+
-    
-    
+
+
         public override List<DiagnosticsNode> debugDescribeChildren() {
             if (this.child == null)
                 return new List<DiagnosticsNode>();
             };
         }
     }
-    
+
-          
-          ) : base(child)
-          {
-              this._absorbing = absorbing;
-            }
+        ) : base(child) {
+            this._absorbing = absorbing;
+        }
-        public bool absorbing
-        {
+        public bool absorbing {
-            set
-            {
-                this._absorbing = value;
-            }
+            set { this._absorbing = value; }
+
-     
+
-    
-     
-      public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
-        base.debugFillProperties(properties);
-        properties.add(new DiagnosticsProperty<bool>("absorbing", this.absorbing));
-      }
+
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new DiagnosticsProperty<bool>("absorbing", this.absorbing));
+        }
-    
+
     public class RenderMetaData : RenderProxyBoxWithHitTestBehavior {
         public RenderMetaData(
             object metaData,
             this.metaData = metaData;
         }
-        
+
         public object metaData;
 
         public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
         }
     }
 
-}
+}

Runtime/ui/geometry.cs

         public static double lerpDouble(double a, double b, double t) {
             return a + (b - a) * t;
         }
+
+        public static double? lerpNullableDouble(double? a, double? b, double t) {
+            if (a == null && b == null) {
+                return null;
+            }
+            a = a ?? b;
+            b = b ?? a;
+            return (double) a + ((double) b - (double) a) * t;
+        }
         
         public static float lerpFloat(float a, float b, float t) {
             return a + (b - a) * t;

Runtime/ui/painting/painting.cs

 using System;
 using Unity.UIWidgets.foundation;
-using Unity.UIWidgets.painting;
 using UnityEngine;
 
 namespace Unity.UIWidgets.ui {
             return fromARGB(this.alpha, this.red, this.green, b);
         }
 
+        static double _linearizeColorComponent(double component) {
+            if (component <= 0.03928)
+                return component / 12.92;
+            return Math.Pow((component + 0.055) / 1.055, 2.4);
+        }
+
+        public double computeLuminance() {
+            double R = _linearizeColorComponent(this.red / 0xFF);
+            double G = _linearizeColorComponent(this.green / 0xFF);
+            double B = _linearizeColorComponent(this.blue / 0xFF);
+            return 0.2126 * R + 0.7152 * G + 0.0722 * B;
+        }
+
         public static Color lerp(Color a, Color b, double t) {
             if (a == null && b == null) {
                 return null;
             if (ReferenceEquals(null, other)) {
                 return false;
             }
+
+
             return this.value == other.value;
         }
 
             }
+
+
+
             return this.Equals((Color) obj);
         }
 
             if (d > 0.0001f) {
                 dx /= d;
                 dy /= d;
-            } else {
+            }
+            else {
                 dx = 0;
                 dy = 1;
             }
         color,
         luminosity,
     }
-}
+}

Runtime/widgets/basic.cs

     }
 
     public class CustomPaint : SingleChildRenderObjectWidget {
-
         public CustomPaint(
             Key key = null,
             CustomPainter painter = null,
         public readonly Size size;
         public readonly bool isComplex;
         public readonly bool willChange;
-        
+
         public override RenderObject createRenderObject(BuildContext context) {
             return new RenderCustomPaint(
                 painter: this.painter,
                 willChange: this.willChange
             );
         }
-        
+
-            ((RenderCustomPaint)renderObject).willChange = this.willChange;
+            ((RenderCustomPaint) renderObject).willChange = this.willChange;
-            ((RenderCustomPaint)renderObject).painter = null;
-            ((RenderCustomPaint)renderObject).foregroundPainter = null;
+            ((RenderCustomPaint) renderObject).painter = null;
+            ((RenderCustomPaint) renderObject).foregroundPainter = null;
         }
     }
 
             string type;
             if (this.width == double.PositiveInfinity && this.height == double.PositiveInfinity) {
                 type = this.GetType() + "expand";
-            } else if (this.width == 0.0 && this.height == 0.0) {
+            }
+            else if (this.width == 0.0 && this.height == 0.0) {
-            } else {
+            }
+            else {
                 type = this.GetType() + "";
             }
 
             if ((this.width == double.PositiveInfinity && this.height == double.PositiveInfinity) ||
                 (this.width == 0.0 && this.height == 0.0)) {
                 level = DiagnosticLevel.hidden;
-            } else {
+            }
+            else {
                 level = DiagnosticLevel.info;
             }
 
     }
 
     public class Offstage : SingleChildRenderObjectWidget {
-        public Offstage(Key key = null, bool offstage = true, Widget child = null):base(key: key, child: child) {
+        public Offstage(Key key = null, bool offstage = true, Widget child = null) : base(key: key, child: child) {
+
-        
+
-            ((RenderOffstage)renderObject).offstage = this.offstage;
+            ((RenderOffstage) renderObject).offstage = this.offstage;
-        
+
-        
+
-    
-    class _OffstageElement: SingleChildRenderObjectElement {
-        internal _OffstageElement(Offstage widget) : base(widget) {}
+
+    class _OffstageElement : SingleChildRenderObjectElement {
+        internal _OffstageElement(Offstage widget) : base(widget) {
+        }
 
         new Offstage widget => (Offstage) base.widget;
 
         }
     }
-    
+
     public class AspectRatio : SingleChildRenderObjectWidget {
         public AspectRatio(
             Key key = null,
                     right = end;
                     break;
             }
+
             return new Positioned(child, key: key, left: left, top: top, right: right, bottom: bottom, width: width,
                 height: height);
         }
         }
     }
 
+    public class PhysicalModel : SingleChildRenderObjectWidget {
+        public PhysicalModel(
+            Key key = null,
+            BoxShape shape = BoxShape.rectangle,
+            Clip clipBehavior = Clip.none,
+            BorderRadius borderRadius = null,
+            double elevation = 0.0,
+            Color color = null,
+            Color shadowColor = null,
+            Widget child = null) : base(key: key, child: child) {
+            D.assert(color != null);
+
+            this.shape = shape;
+            this.clipBehavior = clipBehavior;
+            this.borderRadius = borderRadius;
+            this.elevation = elevation;
+            this.color = color;
+            this.shadowColor = shadowColor ?? new Color(0xFF000000);
+        }
+
+        public readonly BoxShape shape;
+
+        public readonly Clip clipBehavior;
+
+        public readonly BorderRadius borderRadius;
+
+        public readonly double elevation;
+
+        public readonly Color color;
+
+        public readonly Color shadowColor;
+
+        public override RenderObject createRenderObject(BuildContext context) {
+            return new RenderPhysicalModel(
+                shape: this.shape,
+                clipBehavior: this.clipBehavior,
+                borderRadius: this.borderRadius,
+                elevation: this.elevation,
+                color: this.color,
+                shadowColor: this.shadowColor);
+        }
+
+        public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
+            RenderPhysicalModel _renderObject = (RenderPhysicalModel) renderObject;
+            _renderObject.shape = this.shape;
+            _renderObject.borderRadius = this.borderRadius;
+            _renderObject.elevation = this.elevation;
+            _renderObject.color = this.color;
+            _renderObject.shadowColor = this.shadowColor;
+        }
+
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new EnumProperty<BoxShape>("shape", this.shape));
+            properties.add(new DiagnosticsProperty<BorderRadius>("borderRadius", this.borderRadius));
+            properties.add(new DoubleProperty("elevation", this.elevation));
+            properties.add(new DiagnosticsProperty<Color>("color", this.color));
+            properties.add(new DiagnosticsProperty<Color>("shadowColor", this.shadowColor));
+        }
+    }
+
+
+    public class PhysicalShape : SingleChildRenderObjectWidget {
+        public PhysicalShape(
+            Key key = null,
+            CustomClipper<Path> clipper = null,
+            Clip clipBehavior = Clip.none,
+            double elevation = 0.0,
+            Color color = null,
+            Color shadowColor = null,
+            Widget child = null) : base(key: key, child: child) {
+            D.assert(clipper != null);
+            D.assert(color != null);
+            this.clipper = clipper;
+            this.clipBehavior = clipBehavior;
+            this.elevation = elevation;
+            this.color = color;
+            this.shadowColor = shadowColor ?? new Color(0xFF000000);
+        }
+
+        public readonly CustomClipper<Path> clipper;
+
+        public readonly Clip clipBehavior;
+
+        public readonly double elevation;
+
+        public readonly Color color;
+
+        public readonly Color shadowColor;
+
+        public override RenderObject createRenderObject(BuildContext context) {
+            return new RenderPhysicalShape(
+                clipper: this.clipper,
+                clipBehavior: this.clipBehavior,
+                elevation: this.elevation,
+                color: this.color,
+                shadowColor: this.shadowColor);
+        }
+
+        public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
+            RenderPhysicalShape _renderObject = (RenderPhysicalShape) renderObject;
+            _renderObject.clipper = this.clipper;
+            _renderObject.elevation = this.elevation;
+            _renderObject.color = this.color;
+            _renderObject.shadowColor = this.shadowColor;
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new DiagnosticsProperty<CustomClipper<Path>>("clipper", this.clipper));
+            properties.add(new DoubleProperty("elevation", this.elevation));
+            properties.add(new DiagnosticsProperty<Color>("color", this.color));
+            properties.add(new DiagnosticsProperty<Color>("shadowColor", this.shadowColor));
+        }
+    }
+
+
     public class Padding : SingleChildRenderObjectWidget {
         public Padding(
             Key key = null,
             bool transformHitTests = true, Widget child = null) : base(key: key, child: child) {
             this.translation = translation;
             this.transformHitTests = transformHitTests;
-        }   
-        
+        }
+
-        
+
         public override RenderObject createRenderObject(BuildContext context) {
             return new RenderFractionalTranslation(
                 translation: this.translation,
-        
+
-            ((RenderFractionalTranslation)renderObject).translation = this.translation;
-            ((RenderFractionalTranslation)renderObject).transformHitTests = this.transformHitTests;
+            ((RenderFractionalTranslation) renderObject).translation = this.translation;
+            ((RenderFractionalTranslation) renderObject).transformHitTests = this.transformHitTests;
-    
+
     public class Align : SingleChildRenderObjectWidget {
         public Align(
             Key key = null,
             if (this.onPointerLeave != null) {
                 listeners.Add("leave");
             }
+
             properties.add(new EnumerableProperty<string>("listeners", listeners, ifEmpty: "<none>"));
             properties.add(new EnumProperty<HitTestBehavior>("behavior", this.behavior));
         }
     }
 
     public class AbsorbPointer : SingleChildRenderObjectWidget {
-
-        
-    
+
-    
-     
+
+
-    
-        public override void updateRenderObject(BuildContext context, RenderObject renderObject)
-        {
+
+        public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
-    
+
-    
+
     public class MetaData : SingleChildRenderObjectWidget {
         public MetaData(
             object metaData,
             return this.builder(context);
         }
     }
-}
+}

Runtime/widgets/icon_theme_data.cs

 
         public readonly double? size;
 
+        public static IconThemeData lerp(IconThemeData a, IconThemeData b, double t) {
+            return new IconThemeData(
+                color: Color.lerp(a.color, b.color, t),
+                opacity: MathUtils.lerpNullableDouble(a.opacity, b.opacity, t),
+                size: MathUtils.lerpNullableDouble(a.size, b.size, t));
+        }
+
+
+
             return Equals(this.color, other.color) &&
                    this._opacity.Equals(other._opacity) &&
                    this.size.Equals(other.size);
             if (ReferenceEquals(null, obj)) {
                 return false;
             }
+
+
+
             return this.Equals((IconThemeData) obj);
         }
 
                 defaultValue: Diagnostics.kNullDefaultValue));
         }
     }
-}
+}

Samples/UIWidgetSample/UIWidgetSample.unity

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+CanvasRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 552752110}
   m_CullTransparentMesh: 0
 --- !u!1 &554372217
 GameObject:

Runtime/material/button.cs

+using System;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+
+namespace Unity.UIWidgets.material {
+    public class RawMaterialButton : StatefulWidget {
+        public RawMaterialButton(
+            Key key = null,
+            VoidCallback onPressed = null,
+            ValueChanged<bool> onHighlightChanged = null,
+            TextStyle textStyle = null,
+            Color fillColor = null,
+            Color highlightColor = null,
+            Color splashColor = null,
+            double elevation = 2.0,
+            double highlightElevation = 8.0,
+            double disabledElevation = 0.0,
+            EdgeInsets padding = null,
+            BoxConstraints constraints = null,
+            ShapeBorder shape = null,
+            TimeSpan? animationDuration = null,
+            Clip clipBehavior = Clip.none,
+            MaterialTapTargetSize? materialTapTargetSize = null,
+            Widget child = null) : base(key: key) {
+            D.assert(onPressed != null);
+            MaterialTapTargetSize _materialTapTargetSize = materialTapTargetSize ?? MaterialTapTargetSize.padded;
+            shape = shape ?? new RoundedRectangleBorder();
+            padding = padding ?? EdgeInsets.zero;
+            constraints = constraints ?? new BoxConstraints(minWidth: 88.0, minHeight: 36.0);
+            TimeSpan _animationDuration = animationDuration ?? Constants.kThemeChangeDuration;
+
+            this.onPressed = onPressed;
+            this.onHighlightChanged = onHighlightChanged;
+            this.textStyle = textStyle;
+            this.fillColor = fillColor;
+            this.highlightColor = highlightColor;
+            this.splashColor = splashColor;
+            this.elevation = elevation;
+            this.highlightElevation = highlightElevation;
+            this.disabledElevation = disabledElevation;
+            this.padding = padding;
+            this.constraints = constraints;
+            this.shape = shape;
+            this.animationDuration = _animationDuration;
+            this.clipBehavior = clipBehavior;
+            this.materialTapTargetSize = _materialTapTargetSize;
+            this.child = child;
+        }
+
+        public readonly VoidCallback onPressed;
+
+        public readonly ValueChanged<bool> onHighlightChanged;
+
+        public readonly TextStyle textStyle;
+
+        public readonly Color fillColor;
+
+        public readonly Color highlightColor;
+
+        public readonly Color splashColor;
+
+        public readonly double elevation;
+
+        public readonly double highlightElevation;
+
+        public readonly double disabledElevation;
+
+        public readonly EdgeInsets padding;
+
+        public readonly BoxConstraints constraints;
+
+        public readonly ShapeBorder shape;
+
+        public readonly TimeSpan animationDuration;
+
+        public readonly Widget child;
+
+        public bool enabled => this.onPressed != null;
+
+        public readonly MaterialTapTargetSize materialTapTargetSize;
+
+        public readonly Clip clipBehavior;
+
+        public override State createState() => new _RawMaterialButtonState();
+    }
+
+
+    class _RawMaterialButtonState : State<RawMaterialButton> {
+        bool _highlight = false;
+
+        void _handleHighlightChanged(bool value) {
+            this.setState(() => {
+                this._highlight = value;
+                if (this.widget.onHighlightChanged != null) {
+                    this.widget.onHighlightChanged(value);
+                }
+            });
+        }
+
+        public override Widget build(BuildContext context) {
+            double elevation = this.widget.enabled
+                ? (this._highlight ? this.widget.highlightElevation : this.widget.elevation)
+                : this.widget.disabledElevation;
+
+            Widget result = new ConstrainedBox(
+                constraints: this.widget.constraints,
+                child: new Material(
+                    elevation: elevation,
+                    textStyle: this.widget.textStyle,
+                    shape: this.widget.shape,
+                    color: this.widget.fillColor,
+                    type: this.widget.fillColor == null ? MaterialType.transparency : MaterialType.button,
+                    animationDuration: this.widget.animationDuration,
+                    clipBehavior: this.widget.clipBehavior,
+                    child: new InkWell(
+                        onHighlightChanged: this._handleHighlightChanged,
+                        splashColor: this.widget.splashColor,
+                        highlightColor: this.widget.highlightColor,
+                        onTap: () => this.widget.onPressed(),
+                        customBorder: this.widget.shape,
+                        child: IconTheme.merge(
+                            data: new IconThemeData(color: this.widget.textStyle?.color),
+                            child: new Container(
+                                padding: this.widget.padding,
+                                child: new Center(
+                                    widthFactor: 1.0,
+                                    heightFactor: 1.0,
+                                    child: this.widget.child)
+                            )
+                        )
+                    )
+                )
+            );
+
+            return result;
+        }
+    }
+}

Runtime/material/button.cs.meta

+fileFormatVersion: 2
+guid: 5452e0dd1a19646fda9cc8dc0b388ee4
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/button_theme.cs

+using System;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.service;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+
+namespace Unity.UIWidgets.material {
+    public enum ButtonTextTheme {
+        normal,
+
+        accent,
+
+        primary
+    }
+
+    public enum ButtonBarLayoutBehavior {
+        constrained,
+
+        padded
+    }
+
+    public class ButtonTheme : InheritedWidget {
+        public ButtonTheme(
+            Key key = null,
+            ButtonTextTheme textTheme = ButtonTextTheme.normal,
+            ButtonBarLayoutBehavior layoutBehavior = ButtonBarLayoutBehavior.padded,
+            double minWidth = 88.0,
+            double height = 36.0,
+            EdgeInsets padding = null,
+            ShapeBorder shape = null,
+            bool alignedDropdown = false,
+            Color buttonColor = null,
+            Color disabledColor = null,
+            Color highlightColor = null,
+            Color splashColor = null,
+            ColorScheme colorScheme = null,
+            MaterialTapTargetSize? materialTapTargetSize = null,
+            Widget child = null) : base(key: key, child: child) {
+            D.assert(minWidth >= 0.0);
+            D.assert(height >= 0.0);
+            this.data = new ButtonThemeData(
+                textTheme: textTheme,
+                minWidth: minWidth,
+                height: height,
+                padding: padding,
+                shape: shape,
+                alignedDropdown: alignedDropdown,
+                layoutBehavior: layoutBehavior,
+                buttonColor: buttonColor,
+                disabledColor: disabledColor,
+                highlightColor: highlightColor,
+                splashColor: splashColor,
+                colorScheme: colorScheme,
+                materialTapTargetSize: materialTapTargetSize);
+        }
+
+        public ButtonTheme(
+            Key key = null,
+            ButtonThemeData data = null,
+            Widget child = null) : base(key: key, child: child) {
+            D.assert(data != null);
+            this.data = data;
+        }
+
+        public readonly ButtonThemeData data;
+
+        public static ButtonThemeData of(BuildContext context) {
+            ButtonTheme inheritedButtonTheme = (ButtonTheme) context.inheritFromWidgetOfExactType(typeof(ButtonTheme));
+            ButtonThemeData buttonTheme = inheritedButtonTheme?.data;
+            if (buttonTheme?.colorScheme == null) {
+                ThemeData theme = Theme.of(context);
+                buttonTheme = buttonTheme ?? theme.buttonTheme;
+                if (buttonTheme.colorScheme == null) {
+                    buttonTheme = buttonTheme.copyWith(
+                        colorScheme: theme.buttonTheme.colorScheme ?? theme.colorScheme);
+                    D.assert(buttonTheme.colorScheme != null);
+                }
+            }
+
+            return buttonTheme;
+        }
+
+        public override bool updateShouldNotify(InheritedWidget oldWidget) =>
+            this.data != ((ButtonTheme) oldWidget).data;
+    }
+
+
+    public class ButtonThemeData : Diagnosticable {
+        public ButtonThemeData(
+            ButtonTextTheme textTheme = ButtonTextTheme.normal,
+            double minWidth = 88.0,
+            double height = 36.0,
+            EdgeInsets padding = null,
+            ShapeBorder shape = null,
+            ButtonBarLayoutBehavior layoutBehavior = ButtonBarLayoutBehavior.padded,
+            bool alignedDropdown = false,
+            Color buttonColor = null,
+            Color disabledColor = null,
+            Color highlightColor = null,
+            Color splashColor = null,
+            ColorScheme colorScheme = null,
+            MaterialTapTargetSize? materialTapTargetSize = null
+        ) {
+            D.assert(minWidth >= 0.0);
+            D.assert(height >= 0.0);
+            this.textTheme = textTheme;
+            this.minWidth = minWidth;
+            this.height = height;
+            this.layoutBehavior = layoutBehavior;
+            this.alignedDropdown = alignedDropdown;
+            this.colorScheme = colorScheme;
+            this._buttonColor = buttonColor;
+            this._disabledColor = disabledColor;
+            this._highlightColor = highlightColor;
+            this._splashColor = splashColor;
+            this._padding = padding;
+            this._shape = shape;
+            this._materialTapTargetSize = materialTapTargetSize;
+        }
+
+
+        public readonly double minWidth;
+
+        public readonly double height;
+
+        public readonly ButtonTextTheme textTheme;
+
+        public readonly ButtonBarLayoutBehavior layoutBehavior;
+
+        public BoxConstraints constraints {
+            get {
+                return new BoxConstraints(minWidth: this.minWidth,
+                    minHeight: this.height);
+            }
+        }
+
+        public EdgeInsets padding {
+            get {
+                if (this._padding != null)
+                    return this._padding;
+                switch (this.textTheme) {
+                    case ButtonTextTheme.normal:
+                    case ButtonTextTheme.accent:
+                        return EdgeInsets.symmetric(horizontal: 16.0);
+                    case ButtonTextTheme.primary:
+                        return EdgeInsets.symmetric(horizontal: 24.0);
+                }
+
+                D.assert(false);
+                return EdgeInsets.zero;
+            }
+        }
+
+        readonly EdgeInsets _padding;
+
+        public ShapeBorder shape {
+            get {
+                if (this._shape != null)
+                    return this._shape;
+                switch (this.textTheme) {
+                    case ButtonTextTheme.normal:
+                    case ButtonTextTheme.accent:
+                        return new RoundedRectangleBorder(
+                            borderRadius: BorderRadius.all(Radius.circular(2.0)));
+                    case ButtonTextTheme.primary:
+                        return new RoundedRectangleBorder(
+                            borderRadius: BorderRadius.all(Radius.circular(4.0)));
+                }
+
+                return new RoundedRectangleBorder();
+            }
+        }
+
+        readonly ShapeBorder _shape;
+
+        public readonly bool alignedDropdown;
+
+        readonly Color _buttonColor;
+
+        readonly Color _disabledColor;
+
+        readonly Color _highlightColor;
+
+        readonly Color _splashColor;
+
+        public readonly ColorScheme colorScheme;
+
+        readonly MaterialTapTargetSize? _materialTapTargetSize;
+
+        public Brightness getBrightness(MaterialButton button) {
+            return button.colorBrightness ?? this.colorScheme.brightness;
+        }
+
+        public ButtonTextTheme getTextTheme(MaterialButton button) {
+            return button.textTheme ?? this.textTheme;
+        }
+
+        Color _getDisabledColor(MaterialButton button) {
+            return this.getBrightness(button) == Brightness.dark
+                ? this.colorScheme.onSurface.withOpacity(0.30)
+                : this.colorScheme.onSurface.withOpacity(0.38);
+        }
+
+
+        Color getDisabledTextColor(MaterialButton button) {
+            if (button.disabledTextColor != null)
+                return button.disabledTextColor;
+            return this._getDisabledColor(button);
+        }
+
+
+        Color getDisabledFillColor(MaterialButton button) {
+            if (button.disabledColor != null)
+                return button.disabledColor;
+            if (this._disabledColor != null)
+                return this._disabledColor;
+            return this._getDisabledColor(button);
+        }
+
+
+        Color getFillColor(MaterialButton button) {
+            Color fillColor = button.enabled ? button.color : button.disabledColor;
+            if (fillColor != null)
+                return fillColor;
+
+//    todo xingwei.zhu: uncomment these when FlatButton & OutlineButton & RaisedButton are ready
+//            if (button is FlatButton || button is OutlineButton)
+//                return null;
+//            
+//            
+//            if (button.enabled && button is RaisedButton && this._buttonColor != null)
+//                return this._buttonColor;
+
+            switch (this.getTextTheme(button)) {
+                case ButtonTextTheme.normal:
+                case ButtonTextTheme.accent:
+                    return button.enabled ? this.colorScheme.primary : this.getDisabledFillColor(button);
+                case ButtonTextTheme.primary:
+                    return button.enabled
+                        ? this._buttonColor ?? this.colorScheme.primary
+                        : this.colorScheme.onSurface.withOpacity(0.12);
+            }
+
+            D.assert(false);
+            return null;
+        }
+
+        public Color getTextColor(MaterialButton button) {
+            if (!button.enabled)
+                return this.getDisabledTextColor(button);
+
+            if (button.textColor != null)
+                return button.textColor;
+
+            switch (this.getTextTheme(button)) {
+                case ButtonTextTheme.normal:
+                    return this.getBrightness(button) == Brightness.dark ? Colors.white : Colors.black87;
+                case ButtonTextTheme.accent:
+                    return this.colorScheme.secondary;
+                case ButtonTextTheme.primary: {
+                    Color fillColor = this.getFillColor(button);
+                    bool fillIsDark = fillColor != null
+                        ? ThemeData.estimateBrightnessForColor(fillColor) == Brightness.dark
+                        : this.getBrightness(button) == Brightness.dark;
+                    if (fillIsDark)
+                        return Colors.white;
+//    todo xingwei.zhu: uncomment these when FlatButton & OutlineButton are ready
+//                    if (button is FlatButton || button is OutlineButton)
+//                        return this.colorScheme.primary;
+                    return Colors.black;
+                }
+            }
+
+            D.assert(false);
+            return null;
+        }
+
+        public Color getSplashColor(MaterialButton button) {
+            if (button.splashColor != null)
+                return button.splashColor;
+
+//    todo xingwei.zhu: uncomment these when FlatButton & OutlineButton & RaisedButton are ready
+//            if (this._splashColor != null && (button is RaisedButton || button is OutlineButton)) {
+//                return this._splashColor;
+//            }
+//
+//            if (this._splashColor != null && button is FlatButton) {
+//                switch (this.getTextTheme(button)) {
+//                    case ButtonTextTheme.normal:
+//                    case ButtonTextTheme.accent:
+//                        return this._splashColor;
+//                    case ButtonTextTheme.primary:
+//                        break;
+//                }
+//            }
+            return this.getTextColor(button).withOpacity(0.12);
+        }
+
+        public Color getHighlightColor(MaterialButton button) {
+            if (button.highlightColor != null)
+                return button.highlightColor;
+
+            switch (this.getTextTheme(button)) {
+                case ButtonTextTheme.normal:
+                case ButtonTextTheme.accent:
+                    return this._highlightColor ?? this.getTextColor(button).withOpacity(0.16);
+                case ButtonTextTheme.primary:
+                    return Colors.transparent;
+            }
+
+            D.assert(false);
+            return Colors.transparent;
+        }
+
+
+        public double getElevation(MaterialButton button) {
+            if (button.elevation != null)
+                return button.elevation ?? 0.0;
+//    todo xingwei.zhu: uncomment these when FlatButton are ready            
+//            if (button is FlatButton)
+//                return 0.0;
+            return 2.0;
+        }
+
+
+        public double getHighlightElevation(MaterialButton button) {
+            if (button.highlightElevation != null)
+                return button.highlightElevation ?? 0.0;
+//    todo xingwei.zhu: uncomment these when FlatButton & OutlineButton are ready 
+//            if (button is FlatButton)
+//                return 0.0;
+//            if (button is OutlineButton)
+//                return 2.0;
+            return 8.0;
+        }
+
+
+        public double getDisabledElevation(MaterialButton button) {
+            if (button.disabledElevation != null)
+                return button.disabledElevation ?? 0.0;
+            return 0.0;
+        }
+
+
+        public EdgeInsets getPadding(MaterialButton button) {
+            if (button.padding != null)
+                return button.padding;
+
+//    todo xingwei.zhu: uncomment these when MaterialButtonWithIconMixin are ready 
+//            if (button is MaterialButtonWithIconMixin)
+//                return const EdgeInsetsDirectional.only(start: 12.0, end: 16.0);
+
+            if (this._padding != null)
+                return this._padding;
+
+            switch (this.getTextTheme(button)) {
+                case ButtonTextTheme.normal:
+                case ButtonTextTheme.accent:
+                    return EdgeInsets.symmetric(horizontal: 16.0);
+                case ButtonTextTheme.primary:
+                    return EdgeInsets.symmetric(horizontal: 24.0);
+            }
+
+            D.assert(false);
+            return EdgeInsets.zero;
+        }
+
+        public ShapeBorder getShape(MaterialButton button) {
+            return button.shape ?? this.shape;
+        }
+
+
+        public TimeSpan getAnimationDuration(MaterialButton button) {
+            return button.animationDuration ?? Constants.kThemeChangeDuration;
+        }
+
+        public BoxConstraints getConstraints(MaterialButton button) => this.constraints;
+
+
+        public MaterialTapTargetSize getMaterialTapTargetSize(MaterialButton button) {
+            return button.materialTapTargetSize ?? this._materialTapTargetSize ?? MaterialTapTargetSize.padded;
+        }
+
+
+        public ButtonThemeData copyWith(
+            ButtonTextTheme? textTheme = null,
+            ButtonBarLayoutBehavior? layoutBehavior = null,
+            double? minWidth = null,
+            double? height = null,
+            EdgeInsets padding = null,
+            ShapeBorder shape = null,
+            bool? alignedDropdown = null,
+            Color buttonColor = null,
+            Color disabledColor = null,
+            Color highlightColor = null,
+            Color splashColor = null,
+            ColorScheme colorScheme = null,
+            MaterialTapTargetSize? materialTapTargetSize = null) {
+            return new ButtonThemeData(
+                textTheme: textTheme ?? this.textTheme,
+                layoutBehavior: layoutBehavior ?? this.layoutBehavior,
+                minWidth: minWidth ?? this.minWidth,
+                height: height ?? this.height,
+                padding: padding ?? this.padding,
+                shape: shape ?? this.shape,
+                alignedDropdown: alignedDropdown ?? this.alignedDropdown,
+                buttonColor: buttonColor ?? this._buttonColor,
+                disabledColor: disabledColor ?? this._disabledColor,
+                highlightColor: highlightColor ?? this._highlightColor,
+                splashColor: splashColor ?? this._splashColor,
+                colorScheme: colorScheme ?? this.colorScheme,
+                materialTapTargetSize: materialTapTargetSize ?? this._materialTapTargetSize);
+        }
+
+        public bool Equals(ButtonThemeData other) {
+            if (ReferenceEquals(null, other)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, other)) {
+                return true;
+            }
+
+            return this.textTheme == other.textTheme
+                   && this.minWidth == other.minWidth
+                   && this.height == other.height
+                   && this.padding == other.padding
+                   && this.shape == other.shape
+                   && this.alignedDropdown == other.alignedDropdown
+                   && this._buttonColor == other._buttonColor
+                   && this._disabledColor == other._disabledColor
+                   && this._highlightColor == other._highlightColor
+                   && this._splashColor == other._splashColor
+                   && this.colorScheme == other.colorScheme
+                   && this._materialTapTargetSize == other._materialTapTargetSize;
+        }
+
+        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((ButtonThemeData) obj);
+        }
+
+        public static bool operator ==(ButtonThemeData left, ButtonThemeData right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(ButtonThemeData left, ButtonThemeData right) {
+            return !Equals(left, right);
+        }
+
+        public override int GetHashCode() {
+            unchecked {
+                var hashCode = this.textTheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.minWidth.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.height.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.padding.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.shape.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.alignedDropdown.GetHashCode();
+                hashCode = (hashCode * 397) ^ this._buttonColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this._disabledColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this._highlightColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this._splashColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.colorScheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this._materialTapTargetSize.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            ButtonThemeData defaultTheme = new ButtonThemeData();
+            properties.add(new EnumProperty<ButtonTextTheme>("textTheme", this.textTheme,
+                defaultValue: defaultTheme.textTheme));
+            properties.add(new DoubleProperty("minWidth", this.minWidth, defaultValue: defaultTheme.minWidth));
+            properties.add(new DoubleProperty("height", this.height, defaultValue: defaultTheme.height));
+            properties.add(new DiagnosticsProperty<EdgeInsets>("padding", this.padding,
+                defaultValue: defaultTheme.padding));
+            properties.add(new DiagnosticsProperty<ShapeBorder>("shape", this.shape, defaultValue: defaultTheme.shape));
+            properties.add(new FlagProperty("alignedDropdown",
+                value: this.alignedDropdown,
+                defaultValue: defaultTheme.alignedDropdown,
+                ifTrue: "dropdown width matches button"
+            ));
+            properties.add(new DiagnosticsProperty<Color>("buttonColor", this._buttonColor, defaultValue: null));
+            properties.add(new DiagnosticsProperty<Color>("disabledColor", this._disabledColor, defaultValue: null));
+            properties.add(new DiagnosticsProperty<Color>("highlightColor", this._highlightColor, defaultValue: null));
+            properties.add(new DiagnosticsProperty<Color>("splashColor", this._splashColor, defaultValue: null));
+            properties.add(new DiagnosticsProperty<ColorScheme>("colorScheme", this.colorScheme,
+                defaultValue: defaultTheme.colorScheme));
+            properties.add(new DiagnosticsProperty<MaterialTapTargetSize?>("materialTapTargetSize",
+                this._materialTapTargetSize, defaultValue: null));
+        }
+    }
+}

Runtime/material/button_theme.cs.meta

+fileFormatVersion: 2
+guid: c00e9535ad31f481cbe2b83d490d714d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/color_scheme.cs

+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.service;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.material {
+    public class ColorScheme : Diagnosticable {
+        public ColorScheme(
+            Color primary,
+            Color primaryVariant,
+            Color secondary,
+            Color secondaryVariant,
+            Color surface,
+            Color background,
+            Color error,
+            Color onPrimary,
+            Color onSecondary,
+            Color onSurface,
+            Color onBackground,
+            Color onError,
+            Brightness brightness) {
+            D.assert(primary != null);
+            D.assert(primaryVariant != null);
+            D.assert(secondary != null);
+            D.assert(secondaryVariant != null);
+            D.assert(surface != null);
+            D.assert(background != null);
+            D.assert(error != null);
+            D.assert(onPrimary != null);
+            D.assert(onSecondary != null);
+            D.assert(onSurface != null);
+            D.assert(onBackground != null);
+            D.assert(onError != null);
+
+            this.primary = primary;
+            this.primaryVariant = primaryVariant;
+            this.secondary = secondary;
+            this.secondaryVariant = secondaryVariant;
+            this.surface = surface;
+            this.background = background;
+            this.error = error;
+            this.onPrimary = onPrimary;
+            this.onSecondary = onSecondary;
+            this.onSurface = onSurface;
+            this.onBackground = onBackground;
+            this.onError = onError;
+            this.brightness = brightness;
+        }
+
+        public static ColorScheme light(
+            Color primary = null,
+            Color primaryVariant = null,
+            Color secondary = null,
+            Color secondaryVariant = null,
+            Color surface = null,
+            Color background = null,
+            Color error = null,
+            Color onPrimary = null,
+            Color onSecondary = null,
+            Color onSurface = null,
+            Color onBackground = null,
+            Color onError = null,
+            Brightness brightness = Brightness.light
+        ) {
+            primary = primary ?? new Color(0xFF6200EE);
+            primaryVariant = primaryVariant ?? new Color(0xFF3700B3);
+            secondary = secondary ?? new Color(0xFF03DAC6);
+            secondaryVariant = secondaryVariant ?? new Color(0xFF018786);
+            surface = surface ?? Colors.white;
+            background = background ?? Colors.white;
+            error = error ?? new Color(0xFFB00020);
+            onPrimary = onPrimary ?? Colors.white;
+            onSecondary = onSecondary ?? Colors.black;
+            onSurface = onSurface ?? Colors.black;
+            onBackground = onBackground ?? Colors.black;
+            onError = onError ?? Colors.white;
+
+            return new ColorScheme(
+                primary: primary,
+                primaryVariant: primaryVariant,
+                secondary: secondary,
+                secondaryVariant: secondaryVariant,
+                surface: surface,
+                background: background,
+                error: error,
+                onPrimary: onPrimary,
+                onSecondary: onSecondary,
+                onSurface: onSurface,
+                onBackground: onBackground,
+                onError: onError,
+                brightness: brightness
+            );
+        }
+
+        public static ColorScheme dark(
+            Color primary = null,
+            Color primaryVariant = null,
+            Color secondary = null,
+            Color secondaryVariant = null,
+            Color surface = null,
+            Color background = null,
+            Color error = null,
+            Color onPrimary = null,
+            Color onSecondary = null,
+            Color onSurface = null,
+            Color onBackground = null,
+            Color onError = null,
+            Brightness brightness = Brightness.dark
+        ) {
+            primary = primary ?? new Color(0xFFBB86FC);
+            primaryVariant = primaryVariant ?? new Color(0xFF4B01D0);
+            secondary = secondary ?? new Color(0xFF03DAC6);
+            secondaryVariant = secondaryVariant ?? new Color(0xFF03DAC6);
+            surface = surface ?? Colors.black;
+            background = background ?? Colors.black;
+            error = error ?? new Color(0xFFB00020);
+            onPrimary = onPrimary ?? Colors.black;
+            onSecondary = onSecondary ?? Colors.black;
+            onSurface = onSurface ?? Colors.white;
+            onBackground = onBackground ?? Colors.white;
+            onError = onError ?? Colors.black;
+
+            return new ColorScheme(
+                primary: primary,
+                primaryVariant: primaryVariant,
+                secondary: secondary,
+                secondaryVariant: secondaryVariant,
+                surface: surface,
+                background: background,
+                error: error,
+                onPrimary: onPrimary,
+                onSecondary: onSecondary,
+                onSurface: onSurface,
+                onBackground: onBackground,
+                onError: onError,
+                brightness: brightness
+            );
+        }
+
+        public static ColorScheme fromSwatch(
+            MaterialColor primarySwatch = null,
+            Color primaryColorDark = null,
+            Color accentColor = null,
+            Color cardColor = null,
+            Color backgroundColor = null,
+            Color errorColor = null,
+            Brightness? brightness = Brightness.light) {
+            D.assert(brightness != null);
+            primarySwatch = primarySwatch ?? Colors.blue;
+
+            bool isDark = brightness == Brightness.dark;
+            bool primaryIsDark = _brightnessFor(primarySwatch) == Brightness.dark;
+            Color secondary = accentColor ?? (isDark ? Colors.tealAccent[200] : primarySwatch);
+            bool secondaryIsDark = _brightnessFor(secondary) == Brightness.dark;
+
+            return new ColorScheme(
+                primary: primarySwatch,
+                primaryVariant: primaryColorDark ?? (isDark ? Colors.black : primarySwatch[700]),
+                secondary: secondary,
+                secondaryVariant: isDark ? Colors.tealAccent[700] : primarySwatch[700],
+                surface: cardColor ?? (isDark ? Colors.grey[800] : Colors.white),
+                background: backgroundColor ?? (isDark ? Colors.grey[700] : primarySwatch[200]),
+                error: errorColor ?? Colors.red[700],
+                onPrimary: primaryIsDark ? Colors.white : Colors.black,
+                onSecondary: secondaryIsDark ? Colors.white : Colors.black,
+                onSurface: isDark ? Colors.white : Colors.black,
+                onBackground: primaryIsDark ? Colors.white : Colors.black,
+                onError: isDark ? Colors.black : Colors.white,
+                brightness: brightness ?? Brightness.light
+            );
+        }
+
+
+        static Brightness _brightnessFor(Color color) => ThemeData.estimateBrightnessForColor(color);
+
+
+        public readonly Color primary;
+
+        public readonly Color primaryVariant;
+
+        public readonly Color secondary;
+
+        public readonly Color secondaryVariant;
+
+        public readonly Color surface;
+
+        public readonly Color background;
+
+        public readonly Color error;
+
+        public readonly Color onPrimary;
+
+        public readonly Color onSecondary;
+
+        public readonly Color onSurface;
+
+        public readonly Color onBackground;
+
+        public readonly Color onError;
+
+        public readonly Brightness brightness;
+
+        public ColorScheme copyWith(
+            Color primary = null,
+            Color primaryVariant = null,
+            Color secondary = null,
+            Color secondaryVariant = null,
+            Color surface = null,
+            Color background = null,
+            Color error = null,
+            Color onPrimary = null,
+            Color onSecondary = null,
+            Color onSurface = null,
+            Color onBackground = null,
+            Color onError = null,
+            Brightness? brightness = null) {
+            return new ColorScheme(
+                primary: primary ?? this.primary,
+                primaryVariant: primaryVariant ?? this.primaryVariant,
+                secondary: secondary ?? this.secondary,
+                secondaryVariant: secondaryVariant ?? this.secondaryVariant,
+                surface: surface ?? this.surface,
+                background: background ?? this.background,
+                error: error ?? this.error,
+                onPrimary: onPrimary ?? this.onPrimary,
+                onSecondary: onSecondary ?? this.onSecondary,
+                onSurface: onSurface ?? this.onSurface,
+                onBackground: onBackground ?? this.onBackground,
+                onError: onError ?? this.onError,
+                brightness: brightness ?? this.brightness
+            );
+        }
+
+        public static ColorScheme lerp(ColorScheme a, ColorScheme b, double t) {
+            return new ColorScheme(
+                primary: Color.lerp(a.primary, b.primary, t),
+                primaryVariant: Color.lerp(a.primaryVariant, b.primaryVariant, t),
+                secondary: Color.lerp(a.secondary, b.secondary, t),
+                secondaryVariant: Color.lerp(a.secondaryVariant, b.secondaryVariant, t),
+                surface: Color.lerp(a.surface, b.surface, t),
+                background: Color.lerp(a.background, b.background, t),
+                error: Color.lerp(a.error, b.error, t),
+                onPrimary: Color.lerp(a.onPrimary, b.onPrimary, t),
+                onSecondary: Color.lerp(a.onSecondary, b.onSecondary, t),
+                onSurface: Color.lerp(a.onSurface, b.onSurface, t),
+                onBackground: Color.lerp(a.onBackground, b.onBackground, t),
+                onError: Color.lerp(a.onError, b.onError, t),
+                brightness: t < 0.5 ? a.brightness : b.brightness
+            );
+        }
+
+
+        public bool Equals(ColorScheme other) {
+            if (ReferenceEquals(null, other)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, other)) {
+                return true;
+            }
+
+            return other.primary == this.primary
+                   && other.primaryVariant == this.primaryVariant
+                   && other.secondary == this.secondary
+                   && other.secondaryVariant == this.secondaryVariant
+                   && other.surface == this.surface
+                   && other.background == this.background
+                   && other.error == this.error
+                   && other.onPrimary == this.onPrimary
+                   && other.onSecondary == this.onSecondary
+                   && other.onSurface == this.onSurface
+                   && other.onBackground == this.onBackground
+                   && other.onError == this.onError
+                   && other.brightness == this.brightness;
+        }
+
+        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((ColorScheme) obj);
+        }
+
+        public static bool operator ==(ColorScheme left, ColorScheme right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(ColorScheme left, ColorScheme right) {
+            return !Equals(left, right);
+        }
+
+        public override int GetHashCode() {
+            unchecked {
+                var hashCode = this.primary.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.primaryVariant.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.secondary.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.secondaryVariant.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.surface.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.background.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.error.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.onPrimary.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.onSecondary.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.onSurface.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.onBackground.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.onError.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.brightness.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            ColorScheme defaultScheme = light();
+            properties.add(new DiagnosticsProperty<Color>("primary", this.primary,
+                defaultValue: defaultScheme.primary));
+            properties.add(new DiagnosticsProperty<Color>("primaryVariant", this.primaryVariant,
+                defaultValue: defaultScheme.primaryVariant));
+            properties.add(new DiagnosticsProperty<Color>("secondary", this.secondary,
+                defaultValue: defaultScheme.secondary));
+            properties.add(new DiagnosticsProperty<Color>("secondaryVariant", this.secondaryVariant,
+                defaultValue: defaultScheme.secondaryVariant));
+            properties.add(new DiagnosticsProperty<Color>("surface", this.surface,
+                defaultValue: defaultScheme.surface));
+            properties.add(new DiagnosticsProperty<Color>("background", this.background,
+                defaultValue: defaultScheme.background));
+            properties.add(new DiagnosticsProperty<Color>("error", this.error, defaultValue: defaultScheme.error));
+            properties.add(new DiagnosticsProperty<Color>("onPrimary", this.onPrimary,
+                defaultValue: defaultScheme.onPrimary));
+            properties.add(new DiagnosticsProperty<Color>("onSecondary", this.onSecondary,
+                defaultValue: defaultScheme.onSecondary));
+            properties.add(new DiagnosticsProperty<Color>("onSurface", this.onSurface,
+                defaultValue: defaultScheme.onSurface));
+            properties.add(new DiagnosticsProperty<Color>("onBackground", this.onBackground,
+                defaultValue: defaultScheme.onBackground));
+            properties.add(new DiagnosticsProperty<Color>("onError", this.onError,
+                defaultValue: defaultScheme.onError));
+            properties.add(new DiagnosticsProperty<Brightness>("brightness", this.brightness,
+                defaultValue: defaultScheme.brightness));
+        }
+    }
+}

Runtime/material/color_scheme.cs.meta

+fileFormatVersion: 2
+guid: a610420b7a8ec44bfa84e81a1e5ff449
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/colors.cs

+using System.Collections.Generic;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.material {
+    public class MaterialColor : ColorSwatch<int> {
+        public MaterialColor(
+            long primary,
+            Dictionary<int, Color> swatch) : base(primary: primary, swatch: swatch) {}
+
+        public Color shade50 => this[50];
+
+        public Color shade100 => this[100];
+
+        public Color shade200 => this[200];
+
+        public Color shade300 => this[300];
+
+        public Color shade400 => this[400];
+
+        public Color shade500 => this[500];
+
+        public Color shade600 => this[600];
+
+        public Color shade700 => this[700];
+
+        public Color shade800 => this[800];
+
+        public Color shade900 => this[900];
+    }
+
+
+    public class MaterialAccentColor : ColorSwatch<int> {
+        public MaterialAccentColor(
+            long primary,
+            Dictionary<int, Color> swatch) : base(primary: primary, swatch: swatch) {
+        }
+
+        public Color shade50 => this[50];
+
+        public Color shade100 => this[100];
+
+        public Color shade200 => this[200];
+
+        public Color shade400 => this[400];
+
+        public Color shade700 => this[700];
+    }
+
+
+    public class Colors {
+        public static readonly Color transparent = new Color(0x00000000);
+
+        public static readonly Color black = new Color(0xFF000000);
+
+        public static readonly Color black87 = new Color(0xDD000000);
+
+        public static readonly Color black54 = new Color(0x8A000000);
+
+        public static readonly Color black45 = new Color(0x73000000);
+
+        public static readonly Color black38 = new Color(0x61000000);
+
+        public static readonly Color black26 = new Color(0x42000000);
+
+        public static readonly Color black12 = new Color(0x1F000000);
+
+        public static readonly Color white = new Color(0xFFFFFFFF);
+
+        public static readonly Color white70 = new Color(0xB3FFFFFF);
+
+        public static readonly Color white54 = new Color(0x8AFFFFFF);
+
+        public static readonly Color white30 = new Color(0x4DFFFFFF);
+
+        public static readonly Color white24 = new Color(0x3DFFFFFF);
+
+        public static readonly Color white12 = new Color(0x1FFFFFFF);
+
+        public static readonly Color white10 = new Color(0x1AFFFFFF);
+
+        public static readonly MaterialColor red = new MaterialColor(
+            _redPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFFFEBEE)},
+                {100, new Color(0xFFFFCDD2)},
+                {200, new Color(0xFFEF9A9A)},
+                {300, new Color(0xFFE57373)},
+                {400, new Color(0xFFEF5350)},
+                {500, new Color(_redPrimaryValue)},
+                {600, new Color(0xFFE53935)},
+                {700, new Color(0xFFD32F2F)},
+                {800, new Color(0xFFC62828)},
+                {900, new Color(0xFFB71C1C)}
+            }
+        );
+
+        const long _redPrimaryValue = 0xFFF44336;
+
+        public static readonly MaterialAccentColor redAccent = new MaterialAccentColor(
+            _redAccentValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFFF8A80)},
+                {200, new Color(_redAccentValue)},
+                {400, new Color(0xFFFF1744)},
+                {700, new Color(0xFFD50000)}
+            }
+        );
+
+        const long _redAccentValue = 0xFFFF5252;
+
+        public static readonly MaterialColor pink = new MaterialColor(
+            _pinkPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFFCE4EC)},
+                {100, new Color(0xFFF8BBD0)},
+                {200, new Color(0xFFF48FB1)},
+                {300, new Color(0xFFF06292)},
+                {400, new Color(0xFFEC407A)},
+                {500, new Color(_pinkPrimaryValue)},
+                {600, new Color(0xFFD81B60)},
+                {700, new Color(0xFFC2185B)},
+                {800, new Color(0xFFAD1457)},
+                {900, new Color(0xFF880E4F)}
+            }
+        );
+
+        const long _pinkPrimaryValue = 0xFFE91E63;
+
+
+        public static readonly MaterialAccentColor pinkAccent = new MaterialAccentColor(
+            _pinkAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFFF80AB)},
+                {200, new Color(_pinkAccentPrimaryValue)},
+                {400, new Color(0xFFF50057)},
+                {700, new Color(0xFFC51162)}
+            }
+        );
+
+        const long _pinkAccentPrimaryValue = 0xFFFF4081;
+
+        public static readonly MaterialColor purple = new MaterialColor(
+            _purplePrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFF3E5F5)},
+                {100, new Color(0xFFE1BEE7)},
+                {200, new Color(0xFFCE93D8)},
+                {300, new Color(0xFFBA68C8)},
+                {400, new Color(0xFFAB47BC)},
+                {500, new Color(_purplePrimaryValue)},
+                {600, new Color(0xFF8E24AA)},
+                {700, new Color(0xFF7B1FA2)},
+                {800, new Color(0xFF6A1B9A)},
+                {900, new Color(0xFF4A148C)}
+            }
+        );
+
+        const long _purplePrimaryValue = 0xFF9C27B0;
+
+        public static readonly MaterialAccentColor purpleAccent = new MaterialAccentColor(
+            _purpleAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFEA80FC)},
+                {200, new Color(_purpleAccentPrimaryValue)},
+                {400, new Color(0xFFD500F9)},
+                {700, new Color(0xFFAA00FF)}
+            }
+        );
+
+        const long _purpleAccentPrimaryValue = 0xFFE040FB;
+
+        public static readonly MaterialColor deepPurple = new MaterialColor(
+            _deepPurplePrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFEDE7F6)},
+                {100, new Color(0xFFD1C4E9)},
+                {200, new Color(0xFFB39DDB)},
+                {300, new Color(0xFF9575CD)},
+                {400, new Color(0xFF7E57C2)},
+                {500, new Color(_deepPurplePrimaryValue)},
+                {600, new Color(0xFF5E35B1)},
+                {700, new Color(0xFF512DA8)},
+                {800, new Color(0xFF4527A0)},
+                {900, new Color(0xFF311B92)}
+            }
+        );
+
+        const long _deepPurplePrimaryValue = 0xFF673AB7;
+
+        public static readonly MaterialAccentColor deepPurpleAccent = new MaterialAccentColor(
+            _deepPurpleAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFB388FF)},
+                {200, new Color(_deepPurpleAccentPrimaryValue)},
+                {400, new Color(0xFF651FFF)},
+                {700, new Color(0xFF6200EA)}
+            }
+        );
+
+        const long _deepPurpleAccentPrimaryValue = 0xFF7C4DFF;
+
+
+        public static readonly MaterialColor indigo = new MaterialColor(
+            _indigoPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFE8EAF6)}, 
+                {100, new Color(0xFFC5CAE9)},
+                {200, new Color(0xFF9FA8DA)},
+                {300, new Color(0xFF7986CB)},
+                {400, new Color(0xFF5C6BC0)},
+                {500, new Color(_indigoPrimaryValue)},
+                {600, new Color(0xFF3949AB)},
+                {700, new Color(0xFF303F9F)},
+                {800, new Color(0xFF283593)},
+                {900, new Color(0xFF1A237E)}
+            }
+        );
+
+        const long _indigoPrimaryValue = 0xFF3F51B5;
+
+        public static readonly MaterialAccentColor indigoAccent = new MaterialAccentColor(
+            _indigoAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFF8C9EFF)},
+                {200, new Color(_indigoAccentPrimaryValue)},
+                {400, new Color(0xFF3D5AFE)},
+                {700, new Color(0xFF304FFE)}
+            }
+        );
+
+        const long _indigoAccentPrimaryValue = 0xFF536DFE;
+
+        public static readonly MaterialColor blue = new MaterialColor(
+            _bluePrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFE3F2FD)},
+                {100, new Color(0xFFBBDEFB)},
+                {200, new Color(0xFF90CAF9)},
+                {300, new Color(0xFF64B5F6)},
+                {400, new Color(0xFF42A5F5)},
+                {500, new Color(_bluePrimaryValue)},
+                {600, new Color(0xFF1E88E5)},
+                {700, new Color(0xFF1976D2)},
+                {800, new Color(0xFF1565C0)},
+                {900, new Color(0xFF0D47A1)}
+            }
+        );
+
+        const long _bluePrimaryValue = 0xFF2196F3;
+
+        public static readonly MaterialAccentColor blueAccent = new MaterialAccentColor(
+            _blueAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFF82B1FF)},
+                {200, new Color(_blueAccentPrimaryValue)},
+                {400, new Color(0xFF2979FF)},
+                {700, new Color(0xFF2962FF)}
+            }
+        );
+
+        const long _blueAccentPrimaryValue = 0xFF448AFF;
+
+        public static readonly MaterialColor lightBlue = new MaterialColor(
+            _lightBluePrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFE1F5FE)},
+                {100, new Color(0xFFB3E5FC)},
+                {200, new Color(0xFF81D4FA)},
+                {300, new Color(0xFF4FC3F7)},
+                {400, new Color(0xFF29B6F6)},
+                {500, new Color(_lightBluePrimaryValue)},
+                {600, new Color(0xFF039BE5)},
+                {700, new Color(0xFF0288D1)},
+                {800, new Color(0xFF0277BD)},
+                {900, new Color(0xFF01579B)},
+            }
+        );
+
+        const long _lightBluePrimaryValue = 0xFF03A9F4;
+
+        public static readonly MaterialAccentColor lightBlueAccent = new MaterialAccentColor(
+            _lightBlueAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFF80D8FF)},
+                {200, new Color(_lightBlueAccentPrimaryValue)},
+                {400, new Color(0xFF00B0FF)},
+                {700, new Color(0xFF0091EA)}
+            }
+        );
+
+        const long _lightBlueAccentPrimaryValue = 0xFF40C4FF;
+
+        public static readonly MaterialColor cyan = new MaterialColor(
+            _cyanPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFE0F7FA)},
+                {100, new Color(0xFFB2EBF2)},
+                {200, new Color(0xFF80DEEA)},
+                {300, new Color(0xFF4DD0E1)},
+                {400, new Color(0xFF26C6DA)},
+                {500, new Color(_cyanPrimaryValue)},
+                {600, new Color(0xFF00ACC1)},
+                {700, new Color(0xFF0097A7)},
+                {800, new Color(0xFF00838F)},
+                {900, new Color(0xFF006064)}
+            }
+        );
+
+        const long _cyanPrimaryValue = 0xFF00BCD4;
+
+        public static readonly MaterialAccentColor cyanAccent = new MaterialAccentColor(
+            _cyanAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFF84FFFF)},
+                {200, new Color(_cyanAccentPrimaryValue)},
+                {400, new Color(0xFF00E5FF)},
+                {700, new Color(0xFF00B8D4)}
+            }
+        );
+
+        const long _cyanAccentPrimaryValue = 0xFF18FFFF;
+
+        public static readonly MaterialColor teal = new MaterialColor(
+            _tealPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFE0F2F1)},
+                {100, new Color(0xFFB2DFDB)},
+                {200, new Color(0xFF80CBC4)},
+                {300, new Color(0xFF4DB6AC)},
+                {400, new Color(0xFF26A69A)},
+                {500, new Color(_tealPrimaryValue)},
+                {600, new Color(0xFF00897B)},
+                {700, new Color(0xFF00796B)},
+                {800, new Color(0xFF00695C)},
+                {900, new Color(0xFF004D40)}
+            }
+        );
+
+        const long _tealPrimaryValue = 0xFF009688;
+
+        public static readonly MaterialAccentColor tealAccent = new MaterialAccentColor(
+            _tealAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFA7FFEB)},
+                {200, new Color(_tealAccentPrimaryValue)},
+                {400, new Color(0xFF1DE9B6)},
+                {700, new Color(0xFF00BFA5)}
+            }
+        );
+
+        const long _tealAccentPrimaryValue = 0xFF64FFDA;
+
+        public static readonly MaterialColor green = new MaterialColor(
+            _greenPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFE8F5E9)},
+                {100, new Color(0xFFC8E6C9)},
+                {200, new Color(0xFFA5D6A7)},
+                {300, new Color(0xFF81C784)},
+                {400, new Color(0xFF66BB6A)},
+                {500, new Color(_greenPrimaryValue)},
+                {600, new Color(0xFF43A047)},
+                {700, new Color(0xFF388E3C)},
+                {800, new Color(0xFF2E7D32)},
+                {900, new Color(0xFF1B5E20)}
+            }
+        );
+
+        const long _greenPrimaryValue = 0xFF4CAF50;
+
+        public static readonly MaterialAccentColor greenAccent = new MaterialAccentColor(
+            _greenAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFB9F6CA)},
+                {200, new Color(_greenAccentPrimaryValue)},
+                {400, new Color(0xFF00E676)},
+                {700, new Color(0xFF00C853)}
+            }
+        );
+
+        const long _greenAccentPrimaryValue = 0xFF69F0AE;
+
+        public static readonly MaterialColor lightGreen = new MaterialColor(
+            _lightGreenPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFF1F8E9)},
+                {100, new Color(0xFFDCEDC8)},
+                {200, new Color(0xFFC5E1A5)},
+                {300, new Color(0xFFAED581)},
+                {400, new Color(0xFF9CCC65)},
+                {500, new Color(_lightGreenPrimaryValue)},
+                {600, new Color(0xFF7CB342)},
+                {700, new Color(0xFF689F38)},
+                {800, new Color(0xFF558B2F)},
+                {900, new Color(0xFF33691E)}
+            }
+        );
+
+        const long _lightGreenPrimaryValue = 0xFF8BC34A;
+
+        public static readonly MaterialAccentColor lightGreenAccent = new MaterialAccentColor(
+            _lightGreenAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFCCFF90)},
+                {200, new Color(_lightGreenAccentPrimaryValue)},
+                {400, new Color(0xFF76FF03)},
+                {700, new Color(0xFF64DD17)}
+            }
+        );
+
+        const long _lightGreenAccentPrimaryValue = 0xFFB2FF59;
+
+        public static readonly MaterialColor lime = new MaterialColor(
+            _limePrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFF9FBE7)},
+                {100, new Color(0xFFF0F4C3)},
+                {200, new Color(0xFFE6EE9C)},
+                {300, new Color(0xFFDCE775)},
+                {400, new Color(0xFFD4E157)},
+                {500, new Color(_limePrimaryValue)},
+                {600, new Color(0xFFC0CA33)},
+                {700, new Color(0xFFAFB42B)},
+                {800, new Color(0xFF9E9D24)},
+                {900, new Color(0xFF827717)}
+            }
+        );
+
+        const long _limePrimaryValue = 0xFFCDDC39;
+
+        public static readonly MaterialAccentColor limeAccent = new MaterialAccentColor(
+            _limeAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFF4FF81)},
+                {200, new Color(_limeAccentPrimaryValue)},
+                {400, new Color(0xFFC6FF00)},
+                {700, new Color(0xFFAEEA00)}
+            }
+        );
+
+        const long _limeAccentPrimaryValue = 0xFFEEFF41;
+
+        public static readonly MaterialColor yellow = new MaterialColor(
+            _yellowPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFFFFDE7)},
+                {100, new Color(0xFFFFF9C4)},
+                {200, new Color(0xFFFFF59D)},
+                {300, new Color(0xFFFFF176)},
+                {400, new Color(0xFFFFEE58)},
+                {500, new Color(_yellowPrimaryValue)},
+                {600, new Color(0xFFFDD835)},
+                {700, new Color(0xFFFBC02D)},
+                {800, new Color(0xFFF9A825)},
+                {900, new Color(0xFFF57F17)}
+            }
+        );
+
+        const long _yellowPrimaryValue = 0xFFFFEB3B;
+
+        public static readonly MaterialAccentColor yellowAccent = new MaterialAccentColor(
+            _yellowAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFFFFF8D)},
+                {200, new Color(_yellowAccentPrimaryValue)},
+                {400, new Color(0xFFFFEA00)},
+                {700, new Color(0xFFFFD600)}
+            }
+        );
+
+        const long _yellowAccentPrimaryValue = 0xFFFFFF00;
+
+        public static readonly MaterialColor amber = new MaterialColor(
+            _amberPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFFFF8E1)},
+                {100, new Color(0xFFFFECB3)},
+                {200, new Color(0xFFFFE082)},
+                {300, new Color(0xFFFFD54F)},
+                {400, new Color(0xFFFFCA28)},
+                {500, new Color(_amberPrimaryValue)},
+                {600, new Color(0xFFFFB300)},
+                {700, new Color(0xFFFFA000)},
+                {800, new Color(0xFFFF8F00)},
+                {900, new Color(0xFFFF6F00)}
+            }
+        );
+
+        const long _amberPrimaryValue = 0xFFFFC107;
+
+        public static readonly MaterialAccentColor amberAccent = new MaterialAccentColor(
+            _amberAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFFFE57F)},
+                {200, new Color(_amberAccentPrimaryValue)},
+                {400, new Color(0xFFFFC400)},
+                {700, new Color(0xFFFFAB00)}
+            }
+        );
+
+        const long _amberAccentPrimaryValue = 0xFFFFD740;
+
+        public static readonly MaterialColor orange = new MaterialColor(
+            _orangePrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFFFF3E0)},
+                {100, new Color(0xFFFFE0B2)},
+                {200, new Color(0xFFFFCC80)},
+                {300, new Color(0xFFFFB74D)},
+                {400, new Color(0xFFFFA726)},
+                {500, new Color(_orangePrimaryValue)},
+                {600, new Color(0xFFFB8C00)},
+                {700, new Color(0xFFF57C00)},
+                {800, new Color(0xFFEF6C00)},
+                {900, new Color(0xFFE65100)}
+            }
+        );
+
+        const long _orangePrimaryValue = 0xFFFF9800;
+
+        public static readonly MaterialAccentColor orangeAccent = new MaterialAccentColor(
+            _orangeAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFFFD180)},
+                {200, new Color(_orangeAccentPrimaryValue)},
+                {400, new Color(0xFFFF9100)},
+                {700, new Color(0xFFFF6D00)}
+            }
+        );
+
+        const long _orangeAccentPrimaryValue = 0xFFFFAB40;
+
+        public static readonly MaterialColor deepOrange = new MaterialColor(
+            _deepOrangePrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFFBE9E7)},
+                {100, new Color(0xFFFFCCBC)},
+                {200, new Color(0xFFFFAB91)},
+                {300, new Color(0xFFFF8A65)},
+                {400, new Color(0xFFFF7043)},
+                {500, new Color(_deepOrangePrimaryValue)},
+                {600, new Color(0xFFF4511E)},
+                {700, new Color(0xFFE64A19)},
+                {800, new Color(0xFFD84315)},
+                {900, new Color(0xFFBF360C)}
+            }
+        );
+
+        const long _deepOrangePrimaryValue = 0xFFFF5722;
+
+
+        public static readonly MaterialAccentColor deepOrangeAccent = new MaterialAccentColor(
+            _deepOrangeAccentPrimaryValue,
+            new Dictionary<int, Color> {
+                {100, new Color(0xFFFF9E80)},
+                {200, new Color(_deepOrangeAccentPrimaryValue)},
+                {400, new Color(0xFFFF3D00)},
+                {700, new Color(0xFFDD2C00)}
+            }
+        );
+
+        const long _deepOrangeAccentPrimaryValue = 0xFFFF6E40;
+
+        public static readonly MaterialColor brown = new MaterialColor(
+            _brownPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFEFEBE9)},
+                {100, new Color(0xFFD7CCC8)},
+                {200, new Color(0xFFBCAAA4)},
+                {300, new Color(0xFFA1887F)},
+                {400, new Color(0xFF8D6E63)},
+                {500, new Color(_brownPrimaryValue)},
+                {600, new Color(0xFF6D4C41)},
+                {700, new Color(0xFF5D4037)},
+                {800, new Color(0xFF4E342E)},
+                {900, new Color(0xFF3E2723)}
+            }
+        );
+
+        const long _brownPrimaryValue = 0xFF795548;
+
+        public static readonly MaterialColor grey = new MaterialColor(
+            _greyPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFFAFAFA)},
+                {100, new Color(0xFFF5F5F5)},
+                {200, new Color(0xFFEEEEEE)},
+                {300, new Color(0xFFE0E0E0)},
+                {350, new Color(0xFFD6D6D6)},
+                {400, new Color(0xFFBDBDBD)},
+                {500, new Color(_greyPrimaryValue)},
+                {600, new Color(0xFF757575)},
+                {700, new Color(0xFF616161)},
+                {800, new Color(0xFF424242)},
+                {850, new Color(0xFF303030)},
+                {900, new Color(0xFF212121)}
+            }
+        );
+
+        const long _greyPrimaryValue = 0xFF9E9E9E;
+
+        public static readonly MaterialColor blueGrey = new MaterialColor(
+            _blueGreyPrimaryValue,
+            new Dictionary<int, Color> {
+                {50, new Color(0xFFECEFF1)},
+                {100, new Color(0xFFCFD8DC)},
+                {200, new Color(0xFFB0BEC5)},
+                {300, new Color(0xFF90A4AE)},
+                {400, new Color(0xFF78909C)},
+                {500, new Color(_blueGreyPrimaryValue)},
+                {600, new Color(0xFF546E7A)},
+                {700, new Color(0xFF455A64)},
+                {800, new Color(0xFF37474F)},
+                {900, new Color(0xFF263238)}
+            }
+        );
+
+        const long _blueGreyPrimaryValue = 0xFF607D8B;
+
+
+        public static readonly List<MaterialColor> primaries = new List<MaterialColor> {
+            red,
+            pink,
+            purple,
+            deepPurple,
+            indigo,
+            blue,
+            lightBlue,
+            cyan,
+            teal,
+            green,
+            lightGreen,
+            lime,
+            yellow,
+            amber,
+            orange,
+            deepOrange,
+            brown,
+            blueGrey
+        };
+
+        public static readonly List<MaterialAccentColor> accents = new List<MaterialAccentColor> {
+            redAccent,
+            pinkAccent,
+            purpleAccent,
+            deepPurpleAccent,
+            indigoAccent,
+            blueAccent,
+            lightBlueAccent,
+            cyanAccent,
+            tealAccent,
+            greenAccent,
+            lightGreenAccent,
+            limeAccent,
+            yellowAccent,
+            amberAccent,
+            orangeAccent,
+            deepOrangeAccent
+        };
+    }
+}

Runtime/material/colors.cs.meta

+fileFormatVersion: 2
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+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/constants.cs

+using System;
+using Unity.UIWidgets.painting;
+
+namespace Unity.UIWidgets.material {
+    public static class Constants {
+        public static readonly double kToolbarHeight = 56.0;
+
+        public static readonly double kBottomNavigationBarHeight = 56.0;
+
+        public static readonly double kTextTabBarHeight = 48.0;
+
+        public static readonly TimeSpan kThemeChangeDuration = new TimeSpan(0, 0, 0, 0, 200);
+
+        public static readonly double kRadialReactionRadius = 20.0;
+
+        public static readonly TimeSpan kRadialReactionDuration = new TimeSpan(0, 0, 0, 0, 100);
+
+        public static readonly int kRadialReactionAlpha = 0x1F;
+
+        public static readonly TimeSpan kTabScrollDuration = new TimeSpan(0, 0, 0, 0, 300);
+
+        public static readonly EdgeInsets kTabLabelPadding = EdgeInsets.symmetric(horizontal: 16.0);
+
+        public static readonly EdgeInsets kMaterialListPadding = EdgeInsets.symmetric(vertical: 8.0);
+    }
+}

Runtime/material/constants.cs.meta

+fileFormatVersion: 2
+guid: 0364fdae877454fb1babca8f67c2561e
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+  defaultReferences: []
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+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/debug.cs

+using System.Collections.Generic;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.widgets;
+
+namespace Unity.UIWidgets.material {
+    public static class MaterialDebug {
+        public static bool debugCheckHasMaterial(BuildContext context) {
+            D.assert(() => {
+                if (!(context.widget is Material) && context.ancestorWidgetOfExactType(typeof(Material)) == null) {
+                    string message = "No Material widget found.";
+                    message += context.widget.GetType() + " widgets require a Material widget ancestor.";
+
+                    message += "In material design, most widgets are conceptually \"printed\" on " +
+                               "a sheet of material. In Flutter\'s material library, that " +
+                               "material is represented by the Material widget. It is the " +
+                               "Material widget that renders ink splashes, for instance. " +
+                               "Because of this, many material library widgets require that " +
+                               "there be a Material widget in the tree above them.";
+
+                    message += "To introduce a Material widget, you can either directly " +
+                               "include one, or use a widget that contains Material itself, " +
+                               "such as a Card, Dialog, Drawer, or Scaffold.";
+
+                    message += "The specific widget that could not find a Material ancestor was:";
+
+                    message += context.widget.toString();
+                    List<Widget> ancestors = new List<Widget>();
+
+                    context.visitAncestorElements((Element element) => {
+                        ancestors.Add(element.widget);
+                        return true;
+                    });
+                    if (ancestors.isNotEmpty()) {
+                        message += "The ancestors of this widget were:";
+                        foreach (Widget ancestor in ancestors)
+                            message += "\n  $ancestor";
+                    }
+                    else {
+                        message += "This widget is the root of the tree, so it has no " +
+                                   "ancestors, let alone a \"Material\" ancestor.";
+                    }
+
+                    throw new UIWidgetsError(message);
+                }
+
+                return true;
+            });
+            return true;
+        }
+    }
+}

Runtime/material/debug.cs.meta

+fileFormatVersion: 2
+guid: 353f6a1d0791640349fe94187f15ad33
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
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+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/ink_decoration.cs

+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+using ImageUtils = Unity.UIWidgets.widgets.ImageUtils;
+
+namespace Unity.UIWidgets.material {
+    public class Ink : StatefulWidget {
+        public Ink(
+            Key key = null,
+            EdgeInsets padding = null,
+            Color color = null,
+            Decoration decoration = null,
+            double? width = null,
+            double? height = null,
+            Widget child = null) : base(key: key) {
+            D.assert(padding == null || padding.isNonNegative);
+            D.assert(decoration == null || decoration.debugAssertIsValid());
+            D.assert(color == null || decoration == null,
+                "Cannot provide both a color and a decoration\n" +
+                "The color argument is just a shorthand for \"decoration: new BoxDecoration(color: color)\".");
+            decoration = decoration ?? (color != null ? new BoxDecoration(color: color) : null);
+            this.padding = padding;
+            this.width = width;
+            this.height = height;
+            this.child = child;
+            this.decoration = decoration;
+        }
+
+        public static Ink image(
+            Key key = null,
+            EdgeInsets padding = null,
+            ImageProvider image = null,
+            ColorFilter colorFilter = null,
+            BoxFit? fit = null,
+            Alignment alignment = null,
+            Rect centerSlice = null,
+            ImageRepeat repeat = ImageRepeat.noRepeat,
+            double? width = null,
+            double? height = null,
+            Widget child = null
+        ) {
+            D.assert(padding == null || padding.isNonNegative);
+            D.assert(image != null);
+
+            alignment = alignment ?? Alignment.center;
+            Decoration decoration = new BoxDecoration(
+                image: new DecorationImage(
+                    image: image,
+                    colorFilter: colorFilter,
+                    fit: fit,
+                    alignment: alignment,
+                    centerSlice: centerSlice,
+                    repeat: repeat)
+            );
+
+            return new Ink(
+                key: key,
+                padding: padding,
+                decoration: decoration,
+                width: width,
+                height: height,
+                child: child);
+        }
+
+
+        public readonly Widget child;
+
+        public readonly EdgeInsets padding;
+
+        public readonly Decoration decoration;
+
+        public readonly double? width;
+
+        public readonly double? height;
+
+        public EdgeInsets _paddingIncludingDecoration {
+            get {
+                if (this.decoration == null || this.decoration.padding == null)
+                    return this.padding;
+                EdgeInsets decorationPadding = this.decoration.padding;
+                if (this.padding == null)
+                    return decorationPadding;
+
+                return this.padding.add(decorationPadding);
+            }
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new DiagnosticsProperty<EdgeInsets>("padding", this.padding, defaultValue: null));
+            properties.add(new DiagnosticsProperty<Decoration>("bg", this.decoration, defaultValue: null));
+        }
+
+        public override State createState() => new _InkState();
+    }
+
+
+    class _InkState : State<Ink> {
+        InkDecoration _ink;
+
+        void _handleRemoved() {
+            this._ink = null;
+        }
+
+        public override void deactivate() {
+            this._ink?.dispose();
+            D.assert(this._ink == null);
+            base.deactivate();
+        }
+
+        public Widget _build(BuildContext context, BoxConstraints constraints) {
+            if (this._ink == null) {
+                this._ink = new InkDecoration(
+                    decoration: this.widget.decoration,
+                    configuration: ImageUtils.createLocalImageConfiguration(context),
+                    controller: Material.of(context),
+                    referenceBox: (RenderBox) context.findRenderObject(),
+                    onRemoved: this._handleRemoved
+                );
+            }
+            else {
+                this._ink.decoration = this.widget.decoration;
+                this._ink.configuration = ImageUtils.createLocalImageConfiguration(context);
+            }
+
+            Widget current = this.widget.child;
+            EdgeInsets effectivePadding = this.widget._paddingIncludingDecoration;
+            if (effectivePadding != null)
+                current = new Padding(
+                    padding: effectivePadding,
+                    child: current);
+
+            return current;
+        }
+
+        public override Widget build(BuildContext context) {
+            D.assert(MaterialDebug.debugCheckHasMaterial(context));
+            Widget result = new LayoutBuilder(
+                builder: this._build
+            );
+            if (this.widget.width != null || this.widget.height != null) {
+                result = new SizedBox(
+                    width: this.widget.width,
+                    height: this.widget.height,
+                    child: result);
+            }
+
+            return result;
+        }
+    }
+
+
+    class InkDecoration : InkFeature {
+        public InkDecoration(
+            Decoration decoration = null,
+            ImageConfiguration configuration = null,
+            MaterialInkController controller = null,
+            RenderBox referenceBox = null,
+            VoidCallback onRemoved = null
+        ) : base(controller: controller, referenceBox: referenceBox, onRemoved: onRemoved) {
+            D.assert(configuration != null);
+            D.assert(decoration != null);
+            D.assert(controller != null);
+            D.assert(referenceBox != null);
+            this._configuration = configuration;
+            this.decoration = decoration;
+            this.controller.addInkFeature(this);
+        }
+
+        BoxPainter _painter;
+
+        public Decoration decoration {
+            get { return this._decoration; }
+            set {
+                if (value == this._decoration)
+                    return;
+                this._decoration = value;
+                this._painter?.Dispose();
+                this._painter = this._decoration?.createBoxPainter(this._handleChanged);
+                this.controller.markNeedsPaint();
+            }
+        }
+
+        Decoration _decoration;
+
+        public ImageConfiguration configuration {
+            get { return this._configuration; }
+            set {
+                D.assert(value != null);
+                if (value == this._configuration)
+                    return;
+                this._configuration = value;
+                this.controller.markNeedsPaint();
+            }
+        }
+
+        ImageConfiguration _configuration;
+
+        void _handleChanged() {
+            this.controller.markNeedsPaint();
+        }
+
+        public override void dispose() {
+            this._painter?.Dispose();
+            base.dispose();
+        }
+
+        protected override void paintFeature(Canvas canvas, Matrix3 transform) {
+            if (this._painter == null)
+                return;
+            Offset originOffset = transform.getAsTranslation();
+            ImageConfiguration sizedConfiguration = this.configuration.copyWith(
+                size: this.referenceBox.size);
+
+            if (originOffset == null) {
+                canvas.save();
+                canvas.concat(transform);
+                this._painter.paint(canvas, Offset.zero, sizedConfiguration);
+                canvas.restore();
+            }
+            else {
+                this._painter.paint(canvas, originOffset, sizedConfiguration);
+            }
+        }
+    }
+}

Runtime/material/ink_decoration.cs.meta

+fileFormatVersion: 2
+guid: 2aa14ff76c10f4d459b55674f0a2b57f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/ink_highlight.cs

+using Unity.UIWidgets.animation;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.material {
+    public class InkHighlight : InteractiveInkFeature {
+        public InkHighlight(
+            MaterialInkController controller = null,
+            RenderBox referenceBox = null,
+            Color color = null,
+            BoxShape shape = BoxShape.rectangle,
+            BorderRadius borderRadius = null,
+            ShapeBorder customBorder = null,
+            RectCallback rectCallback = null,
+            VoidCallback onRemoved = null) : base(
+            controller: controller,
+            referenceBox: referenceBox,
+            color: color,
+            onRemoved: onRemoved) {
+            D.assert(color != null);
+            D.assert(controller != null);
+            D.assert(referenceBox != null);
+            this._shape = shape;
+            this._borderRadius = borderRadius ?? BorderRadius.zero;
+            this._customBorder = customBorder;
+            this._rectCallback = rectCallback;
+            
+            this._alphaController = new AnimationController(
+                duration: InkHighlightUtils._kHighlightFadeDuration,
+                vsync: controller.vsync);
+            this._alphaController.addListener(controller.markNeedsPaint);
+            this._alphaController.addStatusListener(this._handleAlphaStatusChanged);
+            this._alphaController.forward();
+
+            this._alpha = this._alphaController.drive(new IntTween(
+                begin: 0, end: color.alpha));
+
+            this.controller.addInkFeature(this);
+        }
+
+        readonly BoxShape _shape;
+
+        readonly BorderRadius _borderRadius;
+
+        readonly ShapeBorder _customBorder;
+
+        readonly RectCallback _rectCallback;
+
+        Animation<int> _alpha;
+        AnimationController _alphaController;
+
+        public bool active => this._active;
+        bool _active = true;
+
+        public void activate() {
+            this._active = true;
+            this._alphaController.forward();
+        }
+
+        public void deactivate() {
+            this._active = false;
+            this._alphaController.reverse();
+        }
+
+        void _handleAlphaStatusChanged(AnimationStatus status) {
+            if (status == AnimationStatus.dismissed && !this._active)
+                this.dispose();
+        }
+
+        public override void dispose() {
+            this._alphaController.dispose();
+            base.dispose();
+        }
+
+        void _paintHighlight(Canvas canvas, Rect rect, Paint paint) {
+            D.assert(this._shape != null);
+            canvas.save();
+            if (this._customBorder != null) {
+                canvas.clipPath(this._customBorder.getOuterPath(rect));
+            }
+
+            switch (this._shape) {
+                case BoxShape.circle: {
+                    canvas.drawCircle(rect.center, Material.defaultSplashRadius, paint);
+                    break;
+                }
+                case BoxShape.rectangle: {
+                    if (this._borderRadius != BorderRadius.zero) {
+                        RRect clipRRect = RRect.fromRectAndCorners(
+                            rect,
+                            topLeft: this._borderRadius.topLeft,
+                            topRight: this._borderRadius.topRight,
+                            bottomLeft: this._borderRadius.bottomLeft,
+                            bottomRight: this._borderRadius.bottomRight);
+                        canvas.drawRRect(clipRRect, paint);
+                    }
+                    else {
+                        canvas.drawRect(rect, paint);
+                    }
+
+                    break;
+                }
+            }
+            canvas.restore();
+        }
+
+        protected override void paintFeature(Canvas canvas, Matrix3 transform) {
+            Paint paint = new Paint {color = this.color.withAlpha(this._alpha.value)};
+            Offset originOffset = transform.getAsTranslation();
+            Rect rect = this._rectCallback != null ? this._rectCallback() : Offset.zero & this.referenceBox.size;
+            if (originOffset == null) {
+                canvas.save();
+                canvas.concat(transform);
+                this._paintHighlight(canvas, rect, paint);
+                canvas.restore();
+            }
+            else {
+                this._paintHighlight(canvas, rect.shift(originOffset), paint);
+            }
+        }
+    }
+}

Runtime/material/ink_highlight.cs.meta

+fileFormatVersion: 2
+guid: 96f34a8540bb74c7687149b4b2514998
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/ink_splash.cs

+using System;
+using Unity.UIWidgets.animation;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.material {
+    public class _InkSplashFactory : InteractiveInkFeatureFactory {
+        public _InkSplashFactory() {
+        }
+
+        public override InteractiveInkFeature create(
+            MaterialInkController controller = null,
+            RenderBox referenceBox = null,
+            Offset position = null,
+            Color color = null,
+            bool containedInkWell = false,
+            RectCallback rectCallback = null,
+            BorderRadius borderRadius = null,
+            ShapeBorder customBorder = null,
+            double? radius = null,
+            VoidCallback onRemoved = null
+        ) {
+            D.assert(controller != null);
+            D.assert(referenceBox != null);
+            D.assert(position != null);
+            D.assert(color != null);
+            return new InkSplash(
+                controller: controller,
+                referenceBox: referenceBox,
+                position: position,
+                color: color,
+                containedInkWell: containedInkWell,
+                rectCallback: rectCallback,
+                borderRadius: borderRadius,
+                customBorder: customBorder,
+                radius: radius,
+                onRemoved: onRemoved);
+        }
+    }
+
+    public class InkSplash : InteractiveInkFeature {
+        public InkSplash(
+            MaterialInkController controller = null,
+            RenderBox referenceBox = null,
+            Offset position = null,
+            Color color = null,
+            bool containedInkWell = false,
+            RectCallback rectCallback = null,
+            BorderRadius borderRadius = null,
+            ShapeBorder customBorder = null,
+            double? radius = null,
+            VoidCallback onRemoved = null
+        ) : base(
+            controller: controller,
+            referenceBox: referenceBox,
+            color: color,
+            onRemoved: onRemoved) {
+            D.assert(controller != null);
+            D.assert(referenceBox != null);
+            this._position = position;
+            this._borderRadius = borderRadius ?? BorderRadius.zero;
+            this._customBorder = customBorder;
+            this._targetRadius =
+                radius ?? InkSplashUtils._getTargetRadius(referenceBox, containedInkWell, rectCallback, position);
+            this._clipCallback = InkSplashUtils._getClipCallback(referenceBox, containedInkWell, rectCallback);
+            this._repositionToReferenceBox = !containedInkWell;
+
+            D.assert(this._borderRadius != null);
+            this._radiusController = new AnimationController(
+                duration: InkSplashUtils._kUnconfirmedSplashDuration,
+                vsync: controller.vsync);
+            this._radiusController.addListener(controller.markNeedsPaint);
+            this._radiusController.forward();
+            this._radius = this._radiusController.drive(new DoubleTween(
+                begin: InkSplashUtils._kSplashInitialSize,
+                end: this._targetRadius));
+
+            this._alphaController = new AnimationController(
+                duration: InkSplashUtils._kSplashFadeDuration,
+                vsync: controller.vsync);
+            this._alphaController.addListener(controller.markNeedsPaint);
+            this._alphaController.addStatusListener(this._handleAlphaStatusChanged);
+            this._alpha = this._alphaController.drive(new IntTween(
+                begin: color.alpha,
+                end: 0));
+
+            controller.addInkFeature(this);
+        }
+
+        readonly Offset _position;
+
+        readonly BorderRadius _borderRadius;
+
+        readonly ShapeBorder _customBorder;
+
+        readonly double _targetRadius;
+
+        readonly RectCallback _clipCallback;
+
+        readonly bool _repositionToReferenceBox;
+
+        Animation<double> _radius;
+        AnimationController _radiusController;
+
+        Animation<int> _alpha;
+        AnimationController _alphaController;
+
+        public static InteractiveInkFeatureFactory splashFactory = new _InkSplashFactory();
+
+        public override void confirm() {
+            int duration = (this._targetRadius / InkSplashUtils._kSplashConfirmedVelocity).floor();
+            this._radiusController.duration = new TimeSpan(0, 0, 0, 0, duration);
+            this._radiusController.forward();
+            this._alphaController.forward();
+        }
+
+        public override void cancel() {
+            this._alphaController?.forward();
+        }
+
+        void _handleAlphaStatusChanged(AnimationStatus status) {
+            if (status == AnimationStatus.completed)
+                this.dispose();
+        }
+
+        public override void dispose() {
+            this._radiusController.dispose();
+            this._alphaController.dispose();
+            this._alphaController = null;
+            base.dispose();
+        }
+
+        protected override void paintFeature(Canvas canvas, Matrix3 transform) {
+            Paint paint = new Paint {color = this.color.withAlpha(this._alpha.value)};
+            Offset center = this._position;
+            if (this._repositionToReferenceBox)
+                center = Offset.lerp(center, this.referenceBox.size.center(Offset.zero), this._radiusController.value);
+            Offset originOffset = transform.getAsTranslation();
+            canvas.save();
+            if (originOffset == null) {
+                canvas.concat(transform);
+            }
+            else {
+                canvas.translate(originOffset.dx, originOffset.dy);
+            }
+
+            if (this._clipCallback != null) {
+                Rect rect = this._clipCallback();
+                if (this._customBorder != null) {
+                    canvas.clipPath(this._customBorder.getOuterPath(rect));
+                }
+                else if (this._borderRadius != BorderRadius.zero) {
+                    canvas.clipRRect(RRect.fromRectAndCorners(
+                        rect,
+                        topLeft: this._borderRadius.topLeft,
+                        topRight: this._borderRadius.topRight,
+                        bottomLeft: this._borderRadius.bottomLeft,
+                        bottomRight: this._borderRadius.bottomRight));
+                }
+                else {
+                    canvas.clipRect(rect);
+                }
+            }
+
+            //todo xingwei.zhu: remove this condition when drawCircle bug fixed (when radius.value == 0)
+            if (this._radius.value != 0)
+                canvas.drawCircle(center, this._radius.value, paint);
+            canvas.restore();
+        }
+    }
+}

Runtime/material/ink_splash.cs.meta

+fileFormatVersion: 2
+guid: 068260026dcf947b0af4c9d7f706ab97
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/ink_well.cs

+using System.Collections.Generic;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.gestures;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+
+namespace Unity.UIWidgets.material {
+    public abstract class InteractiveInkFeature : InkFeature {
+        public InteractiveInkFeature(
+            MaterialInkController controller = null,
+            RenderBox referenceBox = null,
+            Color color = null,
+            VoidCallback onRemoved = null
+        ) : base(controller: controller, referenceBox: referenceBox, onRemoved: onRemoved) {
+            D.assert(controller != null);
+            D.assert(referenceBox != null);
+            this._color = color;
+        }
+
+        public virtual void confirm() {
+        }
+
+        public virtual void cancel() {
+        }
+
+        public Color color {
+            get { return this._color; }
+            set {
+                if (value == this._color)
+                    return;
+                this._color = value;
+                this.controller.markNeedsPaint();
+            }
+        }
+
+        Color _color;
+    }
+
+    public abstract class InteractiveInkFeatureFactory {
+        public InteractiveInkFeatureFactory() {
+        }
+
+        public abstract InteractiveInkFeature create(
+            MaterialInkController controller = null,
+            RenderBox referenceBox = null,
+            Offset position = null,
+            Color color = null,
+            bool containedInkWell = false,
+            RectCallback rectCallback = null,
+            BorderRadius borderRadius = null,
+            ShapeBorder customBorder = null,
+            double? radius = null,
+            VoidCallback onRemoved = null);
+    }
+
+
+    public class InkResponse : StatefulWidget {
+        public InkResponse(
+            Key key = null,
+            Widget child = null,
+            GestureTapCallback onTap = null,
+            GestureTapDownCallback onTapDown = null,
+            GestureTapCallback onTapCancel = null,
+            GestureTapCallback onDoubleTap = null,
+            GestureLongPressCallback onLongPress = null,
+            ValueChanged<bool> onHighlightChanged = null,
+            bool containedInkWell = false,
+            BoxShape highlightShape = BoxShape.circle,
+            double? radius = null,
+            BorderRadius borderRadius = null,
+            ShapeBorder customBorder = null,
+            Color highlightColor = null,
+            Color splashColor = null,
+            InteractiveInkFeatureFactory splashFactory = null) : base(key: key) {
+            this.child = child;
+            this.onTap = onTap;
+            this.onTapDown = onTapDown;
+            this.onTapCancel = onTapCancel;
+            this.onDoubleTap = onDoubleTap;
+            this.onLongPress = onLongPress;
+            this.onHighlightChanged = onHighlightChanged;
+            this.containedInkWell = containedInkWell;
+            this.highlightShape = highlightShape;
+            this.radius = radius;
+            this.borderRadius = borderRadius;
+            this.customBorder = customBorder;
+            this.highlightColor = highlightColor;
+            this.splashColor = splashColor;
+            this.splashFactory = splashFactory;
+        }
+
+        public readonly Widget child;
+
+        public readonly GestureTapCallback onTap;
+
+        public readonly GestureTapDownCallback onTapDown;
+
+        public readonly GestureTapCallback onTapCancel;
+
+        public readonly GestureTapCallback onDoubleTap;
+
+        public readonly GestureLongPressCallback onLongPress;
+
+        public readonly ValueChanged<bool> onHighlightChanged;
+
+        public readonly bool containedInkWell;
+
+        public readonly BoxShape highlightShape;
+
+        public readonly double? radius;
+
+        public readonly BorderRadius borderRadius;
+
+        public readonly ShapeBorder customBorder;
+
+        public readonly Color highlightColor;
+
+        public readonly Color splashColor;
+
+        public readonly InteractiveInkFeatureFactory splashFactory;
+
+        public virtual RectCallback getRectCallback(RenderBox referenceBox) => null;
+
+
+        public virtual bool debugCheckContext(BuildContext context) {
+            D.assert(MaterialDebug.debugCheckHasMaterial(context));
+            return true;
+        }
+
+        public override State createState() => new _InkResponseState<InkResponse>();
+
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            List<string> gestures = new List<string>();
+            if (this.onTap != null)
+                gestures.Add("tap");
+            if (this.onDoubleTap != null)
+                gestures.Add("double tap");
+            if (this.onLongPress != null)
+                gestures.Add("long press");
+            if (this.onTapDown != null)
+                gestures.Add("tap down");
+            if (this.onTapCancel != null)
+                gestures.Add("tap cancel");
+            properties.add(new EnumerableProperty<string>("gestures", gestures, ifEmpty: "<none>"));
+            properties.add(new DiagnosticsProperty<bool>("containedInkWell", this.containedInkWell,
+                level: DiagnosticLevel.fine));
+            properties.add(new DiagnosticsProperty<BoxShape>(
+                "highlightShape",
+                this.highlightShape,
+                description: (this.containedInkWell ? "clipped to" : "") + this.highlightShape,
+                showName: false
+            ));
+        }
+    }
+
+
+    public class _InkResponseState<T> : AutomaticKeepAliveClientMixin<T> where T : InkResponse {
+        HashSet<InteractiveInkFeature> _splashes;
+        InteractiveInkFeature _currentSplash;
+        InkHighlight _lastHighlight;
+
+        protected override bool wantKeepAlive =>
+            this._lastHighlight != null || (this._splashes != null && this._splashes.isNotEmpty());
+
+        public void updateHighlight(bool value) {
+            if (value == (this._lastHighlight != null && this._lastHighlight.active))
+                return;
+            if (value) {
+                if (this._lastHighlight == null) {
+                    RenderBox referenceBox = (RenderBox) this.context.findRenderObject();
+                    this._lastHighlight = new InkHighlight(
+                        controller: Material.of(this.context),
+                        referenceBox: referenceBox,
+                        color: this.widget.highlightColor ?? Theme.of(this.context).highlightColor,
+                        shape: this.widget.highlightShape,
+                        borderRadius: this.widget.borderRadius,
+                        customBorder: this.widget.customBorder,
+                        rectCallback: this.widget.getRectCallback(referenceBox),
+                        onRemoved: this._handleInkHighlightRemoval);
+                    this.updateKeepAlive();
+                }
+                else {
+                    this._lastHighlight.activate();
+                }
+            }
+            else {
+                this._lastHighlight.deactivate();
+            }
+
+            D.assert(value == (this._lastHighlight != null && this._lastHighlight.active));
+            if (this.widget.onHighlightChanged != null)
+                this.widget.onHighlightChanged(value);
+        }
+
+        void _handleInkHighlightRemoval() {
+            D.assert(this._lastHighlight != null);
+            this._lastHighlight = null;
+            this.updateKeepAlive();
+        }
+
+        InteractiveInkFeature _createInkFeature(TapDownDetails details) {
+            MaterialInkController inkController = Material.of(this.context);
+            RenderBox referenceBox = (RenderBox) this.context.findRenderObject();
+            Offset position = referenceBox.globalToLocal(details.globalPosition);
+            Color color = this.widget.splashColor ?? Theme.of(this.context).splashColor;
+            RectCallback rectCallback = this.widget.containedInkWell ? this.widget.getRectCallback(referenceBox) : null;
+            BorderRadius borderRadius = this.widget.borderRadius;
+            ShapeBorder customBorder = this.widget.customBorder;
+
+            InteractiveInkFeature splash = null;
+
+            void OnRemoved() {
+                if (this._splashes != null) {
+                    D.assert(this._splashes.Contains(splash));
+                    this._splashes.Remove(splash);
+                    if (this._currentSplash == splash) this._currentSplash = null;
+                    this.updateKeepAlive();
+                }
+            }
+
+            splash = (this.widget.splashFactory ?? Theme.of(this.context).splashFactory).create(
+                controller: inkController,
+                referenceBox: referenceBox,
+                position: position,
+                color: color,
+                containedInkWell: this.widget.containedInkWell,
+                rectCallback: rectCallback,
+                radius: this.widget.radius,
+                borderRadius: borderRadius,
+                customBorder: customBorder,
+                onRemoved: OnRemoved);
+
+            return splash;
+        }
+
+
+        void _handleTapDown(TapDownDetails details) {
+            InteractiveInkFeature splash = this._createInkFeature(details);
+            this._splashes = this._splashes ?? new HashSet<InteractiveInkFeature>();
+            this._splashes.Add(splash);
+            this._currentSplash = splash;
+            if (this.widget.onTapDown != null) {
+                this.widget.onTapDown(details);
+            }
+
+            this.updateKeepAlive();
+            this.updateHighlight(true);
+        }
+
+        void _handleTap(BuildContext context) {
+            this._currentSplash?.confirm();
+            this._currentSplash = null;
+            this.updateHighlight(false);
+            if (this.widget.onTap != null) {
+                this.widget.onTap();
+            }
+        }
+
+        void _handleTapCancel() {
+            this._currentSplash?.cancel();
+            this._currentSplash = null;
+            if (this.widget.onTapCancel != null) {
+                this.widget.onTapCancel();
+            }
+
+            this.updateHighlight(false);
+        }
+
+        void _handleDoubleTap() {
+            this._currentSplash?.confirm();
+            this._currentSplash = null;
+            if (this.widget.onDoubleTap != null) {
+                this.widget.onDoubleTap();
+            }
+        }
+
+        void _handleLongPress(BuildContext context) {
+            this._currentSplash?.confirm();
+            this._currentSplash = null;
+            if (this.widget.onLongPress != null) {
+                this.widget.onLongPress();
+            }
+        }
+
+        public override void deactivate() {
+            if (this._splashes != null) {
+                HashSet<InteractiveInkFeature> splashes = this._splashes;
+                this._splashes = null;
+                foreach (InteractiveInkFeature splash in splashes)
+                    splash.dispose();
+                this._currentSplash = null;
+            }
+
+            D.assert(this._currentSplash == null);
+            this._lastHighlight?.dispose();
+            this._lastHighlight = null;
+            base.deactivate();
+        }
+
+        public override Widget build(BuildContext context) {
+            D.assert(this.widget.debugCheckContext(context));
+            base.build(context);
+            ThemeData themeData = Theme.of(context);
+            if (this._lastHighlight != null)
+                this._lastHighlight.color = this.widget.highlightColor ?? themeData.highlightColor;
+            if (this._currentSplash != null)
+                this._currentSplash.color = this.widget.splashColor ?? themeData.splashColor;
+            bool enabled = this.widget.onTap != null || this.widget.onDoubleTap != null ||
+                           this.widget.onLongPress != null;
+
+            return new GestureDetector(
+                onTapDown: enabled ? (GestureTapDownCallback) this._handleTapDown : null,
+                onTap: enabled ? (GestureTapCallback) (() => this._handleTap(context)) : null,
+                onTapCancel: enabled ? (GestureTapCancelCallback) this._handleTapCancel : null,
+                onDoubleTap: this.widget.onDoubleTap != null ? (GestureDoubleTapCallback) (details => this._handleDoubleTap()) : null,
+                onLongPress: this.widget.onLongPress != null
+                    ? (GestureLongPressCallback) (() => this._handleLongPress(context))
+                    : null,
+                behavior: HitTestBehavior.opaque,
+                child: this.widget.child
+            );
+        }
+    }
+
+
+    public class InkWell : InkResponse {
+        public InkWell(
+            Key key = null,
+            Widget child = null,
+            GestureTapCallback onTap = null,
+            GestureTapCallback onDoubleTap = null,
+            GestureLongPressCallback onLongPress = null,
+            GestureTapDownCallback onTapDown = null,
+            GestureTapCancelCallback onTapCancel = null,
+            ValueChanged<bool> onHighlightChanged = null,
+            Color highlightColor = null,
+            Color splashColor = null,
+            InteractiveInkFeatureFactory splashFactory = null,
+            double? radius = null,
+            BorderRadius borderRadius = null,
+            ShapeBorder customBorder = null
+        ) : base(
+            key: key,
+            child: child,
+            onTap: onTap,
+            onDoubleTap: onDoubleTap,
+            onLongPress: onLongPress,
+            onTapDown: onTapDown,
+            onTapCancel: () => onTapCancel(),
+            onHighlightChanged: onHighlightChanged,
+            containedInkWell: true,
+            highlightColor: highlightColor,
+            splashColor: splashColor,
+            splashFactory: splashFactory,
+            radius: radius,
+            borderRadius: borderRadius,
+            customBorder: customBorder) {
+        }
+    }
+}

Runtime/material/ink_well.cs.meta

+fileFormatVersion: 2
+guid: 9a7302f1a187741b88618822daf7a657
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/material.cs

+using System;
+using System.Collections.Generic;
+using Unity.UIWidgets.animation;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.scheduler;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+
+namespace Unity.UIWidgets.material {
+    public delegate Rect RectCallback();
+
+    public enum MaterialType {
+        canvas,
+        card,
+        circle,
+        button,
+        transparency
+    }
+
+
+    public interface MaterialInkController {
+        Color color { get; set; }
+
+        TickerProvider vsync { get; }
+
+        void addInkFeature(InkFeature feature);
+
+        void markNeedsPaint();
+    }
+
+
+    public class Material : StatefulWidget {
+        public Material(
+            Key key = null,
+            MaterialType type = MaterialType.canvas,
+            double elevation = 0.0,
+            Color color = null,
+            Color shadowColor = null,
+            TextStyle textStyle = null,
+            BorderRadius borderRadius = null,
+            ShapeBorder shape = null,
+            Clip clipBehavior = Clip.none,
+            TimeSpan? animationDuration = null,
+            Widget child = null
+        ) : base(key: key) {
+            D.assert(!(shape != null && borderRadius != null));
+            D.assert(!(type == MaterialType.circle && (borderRadius != null || shape != null)));
+
+            this.type = type;
+            this.elevation = elevation;
+            this.color = color;
+            this.shadowColor = shadowColor ?? new Color(0xFF000000);
+            this.textStyle = textStyle;
+            this.borderRadius = borderRadius;
+            this.shape = shape;
+            this.clipBehavior = clipBehavior;
+            this.animationDuration = animationDuration ?? Constants.kThemeChangeDuration;
+            this.child = child;
+        }
+
+        public readonly Widget child;
+
+        public readonly MaterialType type;
+
+        public readonly double elevation;
+
+        public readonly Color color;
+
+        public readonly Color shadowColor;
+
+        public readonly TextStyle textStyle;
+
+        public readonly ShapeBorder shape;
+
+        public readonly Clip clipBehavior;
+
+        public readonly TimeSpan animationDuration;
+
+        public readonly BorderRadius borderRadius;
+
+
+        public static MaterialInkController of(BuildContext context) {
+            _RenderInkFeatures result =
+                (_RenderInkFeatures) context.ancestorRenderObjectOfType(new TypeMatcher<_RenderInkFeatures>());
+            return result;
+        }
+
+        public override State createState() => new _MaterialState();
+
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new EnumProperty<MaterialType>("type", this.type));
+            properties.add(new DoubleProperty("elevation", this.elevation, defaultValue: 0.0));
+            properties.add(new DiagnosticsProperty<Color>("color", this.color, defaultValue: null));
+            properties.add(new DiagnosticsProperty<Color>("shadowColor", this.shadowColor,
+                defaultValue: new Color(0xFF000000)));
+            this.textStyle?.debugFillProperties(properties);
+            properties.add(new DiagnosticsProperty<ShapeBorder>("shape", this.shape, defaultValue: null));
+            properties.add(new EnumProperty<BorderRadius>("borderRadius", this.borderRadius, defaultValue: null));
+        }
+
+        public const double defaultSplashRadius = 35.0;
+    }
+
+
+    class _MaterialState : TickerProviderStateMixin<Material> {
+        readonly GlobalKey _inkFeatureRenderer = GlobalKey.key(debugLabel: "ink renderer");
+
+        Color _getBackgroundColor(BuildContext context) {
+            if (this.widget.color != null)
+                return this.widget.color;
+            switch (this.widget.type) {
+                case MaterialType.canvas:
+                    return Theme.of(context).canvasColor;
+                case MaterialType.card:
+                    return Theme.of(context).cardColor;
+                default:
+                    return null;
+            }
+        }
+
+        public override Widget build(BuildContext context) {
+            Color backgroundColor = this._getBackgroundColor(context);
+            D.assert(backgroundColor != null || this.widget.type == MaterialType.transparency);
+            Widget contents = this.widget.child;
+            if (contents != null) {
+                contents = new AnimatedDefaultTextStyle(
+                    style: this.widget.textStyle ?? Theme.of(context).textTheme.body1,
+                    duration: this.widget.animationDuration,
+                    child: contents
+                );
+            }
+
+            contents = new NotificationListener<LayoutChangedNotification>(
+                onNotification: (LayoutChangedNotification notification) => {
+                    _RenderInkFeatures renderer =
+                        (_RenderInkFeatures) this._inkFeatureRenderer.currentContext.findRenderObject();
+                    renderer._didChangeLayout();
+                    return true;
+                },
+                child: new _InkFeatures(
+                    key: this._inkFeatureRenderer,
+                    color: backgroundColor,
+                    child: contents,
+                    vsync: this
+                )
+            );
+
+            if (this.widget.type == MaterialType.canvas && this.widget.shape == null &&
+                this.widget.borderRadius == null) {
+                return new AnimatedPhysicalModel(
+                    curve: Curves.fastOutSlowIn,
+                    duration: this.widget.animationDuration,
+                    shape: BoxShape.rectangle,
+                    clipBehavior: this.widget.clipBehavior,
+                    borderRadius: BorderRadius.zero,
+                    elevation: this.widget.elevation,
+                    color: backgroundColor,
+                    shadowColor: this.widget.shadowColor,
+                    animateColor: false,
+                    child: contents
+                );
+            }
+
+            ShapeBorder shape = this._getShape();
+
+            //todo xingwei.zhu: add support for transparentInterior Material
+            if (this.widget.type == MaterialType.transparency) {
+                D.assert(false, "material widget is not completely implemented yet.");
+                return null;
+//                return this._transparentInterior(
+//                    shape: shape,
+//                    clipBehavior: this.widget.clipBehavior,
+//                    contents: contents);
+            }
+
+            return new _MaterialInterior(
+                curve: Curves.fastOutSlowIn,
+                duration: this.widget.animationDuration,
+                shape: shape,
+                clipBehavior: this.widget.clipBehavior,
+                elevation: this.widget.elevation,
+                color: backgroundColor,
+                shadowColor: this.widget.shadowColor,
+                child: contents
+            );
+        }
+
+
+        ShapeBorder _getShape() {
+            if (this.widget.shape != null)
+                return this.widget.shape;
+            if (this.widget.borderRadius != null)
+                return new RoundedRectangleBorder(borderRadius: this.widget.borderRadius);
+            switch (this.widget.type) {
+                case MaterialType.canvas:
+                case MaterialType.transparency:
+                    return new RoundedRectangleBorder();
+                case MaterialType.card:
+                case MaterialType.button:
+                    return new RoundedRectangleBorder(
+                        borderRadius: this.widget.borderRadius ?? MaterialConstantsUtils.kMaterialEdges[this.widget.type]);
+                case MaterialType.circle:
+                    return new CircleBorder();
+            }
+
+            return new RoundedRectangleBorder();
+        }
+    }
+
+
+    public class _RenderInkFeatures : RenderProxyBox, MaterialInkController {
+        public _RenderInkFeatures(
+            RenderBox child = null,
+            TickerProvider vsync = null,
+            Color color = null) : base(child: child) {
+            D.assert(vsync != null);
+            this._vsync = vsync;
+            this._color = color;
+        }
+
+        public TickerProvider vsync {
+            get { return this._vsync; }
+        }
+
+        readonly TickerProvider _vsync;
+
+        public Color color {
+            get { return this._color; }
+            set { this._color = value; }
+        }
+
+        Color _color;
+
+        List<InkFeature> _inkFeatures;
+
+        public void addInkFeature(InkFeature feature) {
+            D.assert(!feature._debugDisposed);
+            D.assert(feature._controller == this);
+            this._inkFeatures = this._inkFeatures ?? new List<InkFeature>();
+            D.assert(!this._inkFeatures.Contains(feature));
+            this._inkFeatures.Add(feature);
+            this.markNeedsPaint();
+        }
+
+        public void _removeFeature(InkFeature feature) {
+            D.assert(this._inkFeatures != null);
+            this._inkFeatures.Remove(feature);
+            this.markNeedsPaint();
+        }
+
+        public void _didChangeLayout() {
+            if (this._inkFeatures != null && this._inkFeatures.isNotEmpty())
+                this.markNeedsPaint();
+        }
+
+        protected override bool hitTestSelf(Offset position) => true;
+
+        public override void paint(PaintingContext context, Offset offset) {
+            if (this._inkFeatures != null && this._inkFeatures.isNotEmpty()) {
+                Canvas canvas = context.canvas;
+                canvas.save();
+                canvas.translate(offset.dx, offset.dy);
+                canvas.clipRect(Offset.zero & this.size);
+                foreach (InkFeature inkFeature in this._inkFeatures)
+                    inkFeature._paint(canvas);
+                canvas.restore();
+            }
+
+            base.paint(context, offset);
+        }
+    }
+
+
+    public class _InkFeatures : SingleChildRenderObjectWidget {
+        public _InkFeatures(
+            Key key = null,
+            Color color = null,
+            TickerProvider vsync = null,
+            Widget child = null) : base(key: key, child: child) {
+            D.assert(vsync != null);
+            this.color = color;
+            this.vsync = vsync;
+        }
+
+        public readonly Color color;
+
+        public readonly TickerProvider vsync;
+
+        public override RenderObject createRenderObject(BuildContext context) {
+            return new _RenderInkFeatures(
+                color: this.color,
+                vsync: this.vsync);
+        }
+
+        public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
+            _RenderInkFeatures _renderObject = (_RenderInkFeatures) renderObject;
+            _renderObject.color = this.color;
+            D.assert(this.vsync == _renderObject.vsync);
+        }
+    }
+
+    public abstract class InkFeature {
+        public InkFeature(
+            MaterialInkController controller = null,
+            RenderBox referenceBox = null,
+            VoidCallback onRemoved = null) {
+            D.assert(controller != null);
+            D.assert(referenceBox != null);
+            this._controller = (_RenderInkFeatures) controller;
+            this.referenceBox = referenceBox;
+            this.onRemoved = onRemoved;
+        }
+
+        public MaterialInkController controller => this._controller;
+        public _RenderInkFeatures _controller;
+
+        public readonly RenderBox referenceBox;
+
+        public readonly VoidCallback onRemoved;
+
+        public bool _debugDisposed = false;
+
+        public virtual void dispose() {
+            D.assert(!this._debugDisposed);
+            D.assert(() => {
+                this._debugDisposed = true;
+                return true;
+            });
+            this._controller._removeFeature(this);
+            if (this.onRemoved != null)
+                this.onRemoved();
+        }
+
+        public void _paint(Canvas canvas) {
+            D.assert(this.referenceBox.attached);
+            D.assert(!this._debugDisposed);
+
+            List<RenderObject> descendants = new List<RenderObject> {this.referenceBox};
+            RenderObject node = this.referenceBox;
+            while (node != this._controller) {
+                node = (RenderObject) node.parent;
+                D.assert(node != null);
+                descendants.Add(node);
+            }
+
+            Matrix3 transform = Matrix3.I();
+            D.assert(descendants.Count >= 2);
+            for (int index = descendants.Count - 1; index > 0; index -= 1)
+                descendants[index].applyPaintTransform(descendants[index - 1], transform);
+            this.paintFeature(canvas, transform);
+        }
+
+        protected abstract void paintFeature(Canvas canvas, Matrix3 transform);
+
+        public string toString() => this.GetType() + "";
+    }
+
+    public class ShapeBorderTween : Tween<ShapeBorder> {
+        public ShapeBorderTween(
+            ShapeBorder begin = null,
+            ShapeBorder end = null) : base(begin: begin, end: end) {
+        }
+
+        public override ShapeBorder lerp(double t) {
+            return ShapeBorder.lerp(this.begin, this.end, t);
+        }
+    }
+
+    public class _MaterialInterior : ImplicitlyAnimatedWidget {
+        public _MaterialInterior(
+            Key key = null,
+            Widget child = null,
+            ShapeBorder shape = null,
+            Clip clipBehavior = Clip.none,
+            double? elevation = null,
+            Color color = null,
+            Color shadowColor = null,
+            Curve curve = null,
+            TimeSpan? duration = null
+        ) : base(key: key, curve: curve ?? Curves.linear, duration: duration) {
+            D.assert(child != null);
+            D.assert(shape != null);
+            D.assert(elevation != null);
+            D.assert(color != null);
+            D.assert(shadowColor != null);
+            D.assert(duration != null);
+            this.child = child;
+            this.shape = shape;
+            this.clipBehavior = clipBehavior;
+            this.elevation = elevation ?? 0.0;
+            this.color = color;
+            this.shadowColor = shadowColor;
+        }
+
+        public readonly Widget child;
+
+        public readonly ShapeBorder shape;
+
+        public readonly Clip clipBehavior;
+
+        public readonly double elevation;
+
+        public readonly Color color;
+
+        public readonly Color shadowColor;
+
+        public override State createState() => new _MaterialInteriorState();
+
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder description) {
+            base.debugFillProperties(description);
+            description.add(new DiagnosticsProperty<ShapeBorder>("shape", this.shape));
+            description.add(new DoubleProperty("elevation", this.elevation));
+            description.add(new DiagnosticsProperty<Color>("color", this.color));
+            description.add(new DiagnosticsProperty<Color>("shadowColor", this.shadowColor));
+        }
+    }
+
+    public class _MaterialInteriorState : AnimatedWidgetBaseState<_MaterialInterior> {
+        DoubleTween _elevation;
+        ColorTween _shadowColor;
+        ShapeBorderTween _border;
+
+        protected override void forEachTween(ITweenVisitor visitor) {
+            this._elevation = (DoubleTween) visitor.visit(this, this._elevation, this.widget.elevation,
+                (double value) => new DoubleTween(begin: value, end: value));
+            this._shadowColor = (ColorTween) visitor.visit(this, this._shadowColor, this.widget.shadowColor,
+                (Color value) => new ColorTween(begin: value));
+            this._border = (ShapeBorderTween) visitor.visit(this, this._border, this.widget.shape,
+                (ShapeBorder value) => new ShapeBorderTween(begin: value));
+        }
+
+        public override Widget build(BuildContext context) {
+            ShapeBorder shape = this._border.evaluate(this.animation);
+            return new PhysicalShape(
+                child: new _ShapeBorderPaint(
+                    child: this.widget.child,
+                    shape: shape),
+                clipper: new ShapeBorderClipper(
+                    shape: shape),
+                clipBehavior: this.widget.clipBehavior,
+                elevation: this._elevation.evaluate(this.animation),
+                color: this.widget.color,
+                shadowColor: this._shadowColor.evaluate(this.animation)
+            );
+        }
+    }
+
+    class _ShapeBorderPaint : StatelessWidget {
+        public _ShapeBorderPaint(
+            Widget child = null,
+            ShapeBorder shape = null) {
+            D.assert(child != null);
+            D.assert(shape != null);
+            this.child = child;
+            this.shape = shape;
+        }
+
+        public readonly Widget child;
+
+        public readonly ShapeBorder shape;
+
+        public override Widget build(BuildContext context) {
+            return new CustomPaint(
+                child: this.child,
+                foregroundPainter: new _ShapeBorderPainter(this.shape));
+        }
+    }
+
+    class _ShapeBorderPainter : CustomPainter {
+        public _ShapeBorderPainter(ShapeBorder border = null) : base(null) {
+            this.border = border;
+        }
+
+        public readonly ShapeBorder border;
+
+
+        public override void paint(Canvas canvas, Size size) {
+            this.border.paint(canvas, Offset.zero & size);
+        }
+
+        public override bool shouldRepaint(CustomPainter oldDelegate) {
+            _ShapeBorderPainter _oldDelegate = (_ShapeBorderPainter) oldDelegate;
+            return _oldDelegate.border != this.border;
+        }
+    }
+}

Runtime/material/material.cs.meta

+fileFormatVersion: 2
+guid: 7c1f7bd49df00452d9a3be75a9e7b213
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/material_button.cs

+using System;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.service;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+
+namespace Unity.UIWidgets.material {
+    public class MaterialButton : StatelessWidget {
+        public MaterialButton(
+            Key key = null,
+            VoidCallback onPressed = null,
+            ValueChanged<bool> onHighlightChanged = null,
+            ButtonTextTheme? textTheme = null,
+            Color textColor = null,
+            Color disabledTextColor = null,
+            Color color = null,
+            Color disabledColor = null,
+            Color highlightColor = null,
+            Color splashColor = null,
+            Brightness? colorBrightness = null,
+            double? elevation = null,
+            double? highlightElevation = null,
+            double? disabledElevation = null,
+            EdgeInsets padding = null,
+            ShapeBorder shape = null,
+            Clip clipBehavior = Clip.none,
+            MaterialTapTargetSize? materialTapTargetSize = null,
+            TimeSpan? animationDuration = null,
+            double? minWidth = null,
+            double? height = null,
+            Widget child = null
+        ) : base(key: key) {
+            D.assert(onPressed != null);
+            this.onPressed = onPressed;
+            this.onHighlightChanged = onHighlightChanged;
+            this.textTheme = textTheme;
+            this.textColor = textColor;
+            this.disabledTextColor = disabledTextColor;
+            this.color = color;
+            this.disabledColor = disabledColor;
+            this.highlightColor = highlightColor;
+            this.splashColor = splashColor;
+            this.colorBrightness = colorBrightness;
+            this.elevation = elevation;
+            this.highlightElevation = highlightElevation;
+            this.disabledElevation = disabledElevation;
+            this.padding = padding;
+            this.shape = shape;
+            this.clipBehavior = clipBehavior;
+            this.materialTapTargetSize = materialTapTargetSize;
+            this.animationDuration = animationDuration;
+            this.minWidth = minWidth;
+            this.height = height;
+            this.child = child;
+        }
+
+        public readonly VoidCallback onPressed;
+
+        public readonly ValueChanged<bool> onHighlightChanged;
+
+        public readonly ButtonTextTheme? textTheme;
+
+        public readonly Color textColor;
+
+        public readonly Color disabledTextColor;
+
+        public readonly Color color;
+
+        public readonly Color disabledColor;
+
+        public readonly Color splashColor;
+
+        public readonly Color highlightColor;
+
+        public readonly double? elevation;
+
+        public readonly double? highlightElevation;
+
+        public readonly double? disabledElevation;
+
+        public readonly Brightness? colorBrightness;
+
+        public readonly Widget child;
+
+        public bool enabled => this.onPressed != null;
+
+        public readonly EdgeInsets padding;
+
+        public readonly ShapeBorder shape;
+
+        public readonly Clip? clipBehavior;
+
+        public readonly TimeSpan? animationDuration;
+
+        public readonly MaterialTapTargetSize? materialTapTargetSize;
+
+        public readonly double? minWidth;
+
+        public readonly double? height;
+
+        public override Widget build(BuildContext context) {
+            ThemeData theme = Theme.of(context);
+            ButtonThemeData buttonTheme = ButtonTheme.of(context);
+
+            return new RawMaterialButton(
+                onPressed: this.onPressed,
+                fillColor: this.color,
+                textStyle: theme.textTheme.button.copyWith(color: buttonTheme.getTextColor(this)),
+                highlightColor: this.highlightColor ?? theme.highlightColor,
+                splashColor: this.splashColor ?? theme.splashColor,
+                elevation: buttonTheme.getElevation(this),
+                highlightElevation: buttonTheme.getHighlightElevation(this),
+                padding: buttonTheme.getPadding(this),
+                constraints: buttonTheme.getConstraints(this).copyWith(
+                    minWidth: this.minWidth,
+                    minHeight: this.height),
+                shape: buttonTheme.shape,
+                clipBehavior: this.clipBehavior ?? Clip.none,
+                animationDuration: buttonTheme.getAnimationDuration(this),
+                child: this.child,
+                materialTapTargetSize: this.materialTapTargetSize ?? theme.materialTapTargetSize);
+        }
+
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new FlagProperty("enabled", value: this.enabled, ifFalse: "disabled"));
+        }
+    }
+}

Runtime/material/material_button.cs.meta

+fileFormatVersion: 2
+guid: ea3964e7af24d4b059ac6e10ec862a3b
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/text_theme.cs

+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.ui;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+
+namespace Unity.UIWidgets.material {
+    public class TextTheme : Diagnosticable {
+        public TextTheme(
+            TextStyle display4 = null,
+            TextStyle display3 = null,
+            TextStyle display2 = null,
+            TextStyle display1 = null,
+            TextStyle headline = null,
+            TextStyle title = null,
+            TextStyle subhead = null,
+            TextStyle body2 = null,
+            TextStyle body1 = null,
+            TextStyle caption = null,
+            TextStyle button = null,
+            TextStyle subtitle = null,
+            TextStyle overline = null
+        ) {
+            this.display4 = display4;
+            this.display3 = display3;
+            this.display2 = display2;
+            this.display1 = display1;
+            this.headline = headline;
+            this.title = title;
+            this.subhead = subhead;
+            this.body2 = body2;
+            this.body1 = body1;
+            this.caption = caption;
+            this.button = button;
+            this.subtitle = subtitle;
+            this.overline = overline;
+        }
+
+
+        public readonly TextStyle display4;
+
+        public readonly TextStyle display3;
+
+        public readonly TextStyle display2;
+
+        public readonly TextStyle display1;
+
+        public readonly TextStyle headline;
+
+        public readonly TextStyle title;
+
+        public readonly TextStyle subhead;
+
+        public readonly TextStyle body2;
+
+        public readonly TextStyle body1;
+
+        public readonly TextStyle caption;
+
+        public readonly TextStyle button;
+
+        public readonly TextStyle subtitle;
+
+        public readonly TextStyle overline;
+
+
+        public TextTheme copyWith(
+            TextStyle display4 = null,
+            TextStyle display3 = null,
+            TextStyle display2 = null,
+            TextStyle display1 = null,
+            TextStyle headline = null,
+            TextStyle title = null,
+            TextStyle subhead = null,
+            TextStyle body2 = null,
+            TextStyle body1 = null,
+            TextStyle caption = null,
+            TextStyle button = null,
+            TextStyle subtitle = null,
+            TextStyle overline = null
+        ) {
+            return new TextTheme(
+                display4: display4 ?? this.display4,
+                display3: display3 ?? this.display3,
+                display2: display2 ?? this.display2,
+                display1: display1 ?? this.display1,
+                headline: headline ?? this.headline,
+                title: title ?? this.title,
+                subhead: subhead ?? this.subhead,
+                body2: body2 ?? this.body2,
+                body1: body1 ?? this.body1,
+                caption: caption ?? this.caption,
+                button: button ?? this.button,
+                subtitle: subtitle ?? this.subtitle,
+                overline: overline ?? this.overline
+            );
+        }
+
+        public TextTheme merge(TextTheme other) {
+            if (other == null)
+                return this;
+            return this.copyWith(
+                display4: this.display4?.merge(other.display4) ?? other.display4,
+                display3: this.display3?.merge(other.display3) ?? other.display3,
+                display2: this.display2?.merge(other.display2) ?? other.display2,
+                display1: this.display1?.merge(other.display1) ?? other.display1,
+                headline: this.headline?.merge(other.headline) ?? other.headline,
+                title: this.title?.merge(other.title) ?? other.title,
+                subhead: this.subhead?.merge(other.subhead) ?? other.subhead,
+                body2: this.body2?.merge(other.body2) ?? other.body2,
+                body1: this.body1?.merge(other.body1) ?? other.body1,
+                caption: this.caption?.merge(other.caption) ?? other.caption,
+                button: this.button?.merge(other.button) ?? other.button,
+                subtitle: this.subtitle?.merge(other.subtitle) ?? other.subtitle,
+                overline: this.overline?.merge(other.overline) ?? other.overline
+            );
+        }
+
+
+        public TextTheme apply(
+            string fontFamily = null,
+            double fontSizeFactor = 1.0,
+            double fontSizeDelta = 0.0,
+            Color displayColor = null,
+            Color bodyColor = null,
+            TextDecoration decoration = null,
+            Color decorationColor = null,
+            TextDecorationStyle? decorationStyle = null
+        ) {
+            return new TextTheme(
+                display4: this.display4?.apply(
+                    color: displayColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                display3: this.display3?.apply(
+                    color: displayColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                display2: this.display2?.apply(
+                    color: displayColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                display1: this.display1?.apply(
+                    color: displayColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                headline: this.headline?.apply(
+                    color: bodyColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                title: this.title?.apply(
+                    color: bodyColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                subhead: this.subhead?.apply(
+                    color: bodyColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                body2: this.body2?.apply(
+                    color: bodyColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                body1: this.body1?.apply(
+                    color: bodyColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                caption: this.caption?.apply(
+                    color: displayColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                button: this.button?.apply(
+                    color: bodyColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                subtitle: this.subtitle?.apply(
+                    color: bodyColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                ),
+                overline: this.overline?.apply(
+                    color: bodyColor,
+                    decoration: decoration,
+                    decorationColor: decorationColor,
+                    decorationStyle: decorationStyle,
+                    fontFamily: fontFamily,
+                    fontSizeFactor: fontSizeFactor,
+                    fontSizeDelta: fontSizeDelta
+                )
+            );
+        }
+
+        public static TextTheme lerp(TextTheme a, TextTheme b, double t) {
+            D.assert(a != null);
+            D.assert(b != null);
+            D.assert(t != null);
+            return new TextTheme(
+                display4: TextStyle.lerp(a.display4, b.display4, t),
+                display3: TextStyle.lerp(a.display3, b.display3, t),
+                display2: TextStyle.lerp(a.display2, b.display2, t),
+                display1: TextStyle.lerp(a.display1, b.display1, t),
+                headline: TextStyle.lerp(a.headline, b.headline, t),
+                title: TextStyle.lerp(a.title, b.title, t),
+                subhead: TextStyle.lerp(a.subhead, b.subhead, t),
+                body2: TextStyle.lerp(a.body2, b.body2, t),
+                body1: TextStyle.lerp(a.body1, b.body1, t),
+                caption: TextStyle.lerp(a.caption, b.caption, t),
+                button: TextStyle.lerp(a.button, b.button, t),
+                subtitle: TextStyle.lerp(a.subtitle, b.subtitle, t),
+                overline: TextStyle.lerp(a.overline, b.overline, t)
+            );
+        }
+
+        public bool Equals(TextTheme other) {
+            if (ReferenceEquals(null, other)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, other)) {
+                return true;
+            }
+
+            return this.display4 == other.display4
+                   && this.display3 == other.display3
+                   && this.display2 == other.display2
+                   && this.display1 == other.display1
+                   && this.headline == other.headline
+                   && this.title == other.title
+                   && this.subhead == other.subhead
+                   && this.body2 == other.body2
+                   && this.body1 == other.body1
+                   && this.caption == other.caption
+                   && this.button == other.button
+                   && this.subtitle == other.subtitle
+                   && this.overline == other.overline;
+        }
+
+        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((TextTheme) obj);
+        }
+
+        public static bool operator ==(TextTheme left, TextTheme right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(TextTheme left, TextTheme right) {
+            return !Equals(left, right);
+        }
+
+        public override int GetHashCode() {
+            unchecked {
+                var hashCode = this.display4.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.display3.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.display2.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.display1.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.headline.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.title.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.subhead.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.body2.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.body1.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.caption.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.button.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.subtitle.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.overline.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            TextTheme defaultTheme = new Typography().black;
+            properties.add(new DiagnosticsProperty<TextStyle>("display4", this.display4,
+                defaultValue: defaultTheme.display4));
+            properties.add(new DiagnosticsProperty<TextStyle>("display3", this.display3,
+                defaultValue: defaultTheme.display3));
+            properties.add(new DiagnosticsProperty<TextStyle>("display2", this.display2,
+                defaultValue: defaultTheme.display2));
+            properties.add(new DiagnosticsProperty<TextStyle>("display1", this.display1,
+                defaultValue: defaultTheme.display1));
+            properties.add(new DiagnosticsProperty<TextStyle>("headline", this.headline,
+                defaultValue: defaultTheme.headline));
+            properties.add(new DiagnosticsProperty<TextStyle>("title", this.title, defaultValue: defaultTheme.title));
+            properties.add(
+                new DiagnosticsProperty<TextStyle>("subhead", this.subhead, defaultValue: defaultTheme.subhead));
+            properties.add(new DiagnosticsProperty<TextStyle>("body2", this.body2, defaultValue: defaultTheme.body2));
+            properties.add(new DiagnosticsProperty<TextStyle>("body1", this.body1, defaultValue: defaultTheme.body1));
+            properties.add(
+                new DiagnosticsProperty<TextStyle>("caption", this.caption, defaultValue: defaultTheme.caption));
+            properties.add(
+                new DiagnosticsProperty<TextStyle>("button", this.button, defaultValue: defaultTheme.button));
+            properties.add(new DiagnosticsProperty<TextStyle>("subtitle)", this.subtitle,
+                defaultValue: defaultTheme.subtitle));
+            properties.add(new DiagnosticsProperty<TextStyle>("overline", this.overline,
+                defaultValue: defaultTheme.overline));
+        }
+    }
+}

Runtime/material/text_theme.cs.meta

+fileFormatVersion: 2
+guid: 48eff72daf6ec48e5805ff0698990499
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/theme.cs

+using System;
+using Unity.UIWidgets.animation;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.widgets;
+
+namespace Unity.UIWidgets.material {
+    public class Theme : StatelessWidget {
+        public Theme(
+            Key key = null,
+            ThemeData data = null,
+            bool isMaterialAppTheme = false,
+            Widget child = null
+        ) : base(key: key) {
+            D.assert(child != null);
+            D.assert(data != null);
+            this.data = data;
+            this.isMaterialAppTheme = isMaterialAppTheme;
+            this.child = child;
+        }
+
+        public readonly ThemeData data;
+
+        public readonly bool isMaterialAppTheme;
+
+        readonly Widget child;
+
+        static readonly ThemeData _kFallbackTheme = ThemeData.fallback();
+
+        public static ThemeData of(BuildContext context, bool shadowThemeOnly = false) {
+            _InheritedTheme inheritedTheme =
+                (_InheritedTheme) context.inheritFromWidgetOfExactType(typeof(_InheritedTheme));
+            if (shadowThemeOnly) {
+                if (inheritedTheme == null || inheritedTheme.theme.isMaterialAppTheme)
+                    return null;
+                return inheritedTheme.theme.data;
+            }
+
+            //todo:xingwei.zhu: material Localizations
+            return inheritedTheme?.theme?.data ?? _kFallbackTheme;
+        }
+
+        public override Widget build(BuildContext context) {
+            return new _InheritedTheme(
+                theme: this,
+                child: new IconTheme(
+                    data: this.data.iconTheme,
+                    child: this.child
+                )
+            );
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new DiagnosticsProperty<ThemeData>("data", this.data, showName: false));
+        }
+    }
+
+
+    class _InheritedTheme : InheritedWidget {
+        public _InheritedTheme(
+            Key key = null,
+            Theme theme = null,
+            Widget child = null) : base(key: key, child: child) {
+            D.assert(theme != null);
+            D.assert(child != null);
+            this.theme = theme;
+        }
+
+        public readonly Theme theme;
+
+        public override bool updateShouldNotify(InheritedWidget old) =>
+            this.theme.data != ((_InheritedTheme) old).theme.data;
+    }
+
+    class ThemeDataTween : Tween<ThemeData> {
+        public ThemeDataTween(
+            ThemeData begin = null,
+            ThemeData end = null
+        ) : base(begin: begin, end: end) {
+        }
+
+        public override ThemeData lerp(double t) => ThemeData.lerp(this.begin, this.end, t);
+    }
+
+    class AnimatedTheme : ImplicitlyAnimatedWidget {
+        public AnimatedTheme(
+            Key key = null,
+            ThemeData data = null,
+            bool isMaterialAppTheme = false,
+            Curve curve = null,
+            TimeSpan? duration = null,
+            Widget child = null
+        ) : base(key: key, curve: curve ?? Curves.linear, duration: duration ?? ThemeUtils.kThemeAnimationDuration) {
+            D.assert(child != null);
+            D.assert(data != null);
+            this.data = data;
+            this.isMaterialAppTheme = isMaterialAppTheme;
+            this.child = child;
+        }
+
+
+        public readonly ThemeData data;
+
+        public readonly bool isMaterialAppTheme;
+
+        public readonly Widget child;
+
+        public override State createState() => new _AnimatedThemeState();
+    }
+
+
+    class _AnimatedThemeState : AnimatedWidgetBaseState<AnimatedTheme> {
+        ThemeDataTween _data;
+
+        protected override void forEachTween(ITweenVisitor visitor) {
+            this._data = (ThemeDataTween) visitor.visit(this, this._data, this.widget.data,
+                (ThemeData value) => new ThemeDataTween(begin: value));
+        }
+
+        public override Widget build(BuildContext context) {
+            return new Theme(
+                isMaterialAppTheme: this.widget.isMaterialAppTheme,
+                child: this.widget.child,
+                data: this._data.evaluate(this.animation)
+            );
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder description) {
+            base.debugFillProperties(description);
+            description.add(
+                new DiagnosticsProperty<ThemeDataTween>("data", this._data, showName: false, defaultValue: null));
+        }
+    }
+}

Runtime/material/theme.cs.meta

+fileFormatVersion: 2
+guid: 8aeba6b651be2405387572671ac527f6
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/theme_data.cs

+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.service;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+
+namespace Unity.UIWidgets.material {
+    public enum MaterialTapTargetSize {
+        padded,
+
+        shrinkWrap
+    }
+
+    public class ThemeData : Diagnosticable {
+        public ThemeData(
+            Brightness? brightness = null,
+            MaterialColor primarySwatch = null,
+            Color primaryColor = null,
+            Brightness? primaryColorBrightness = null,
+            Color primaryColorLight = null,
+            Color primaryColorDark = null,
+            Color accentColor = null,
+            Brightness? accentColorBrightness = null,
+            Color canvasColor = null,
+            Color scaffoldBackgroundColor = null,
+            Color bottomAppBarColor = null,
+            Color cardColor = null,
+            Color dividerColor = null,
+            Color highlightColor = null,
+            Color splashColor = null,
+            InteractiveInkFeatureFactory splashFactory = null,
+            Color selectedRowColor = null,
+            Color unselectedWidgetColor = null,
+            Color disabledColor = null,
+            Color buttonColor = null,
+            ButtonThemeData buttonTheme = null,
+            Color secondaryHeaderColor = null,
+            Color textSelectionColor = null,
+            Color cursorColor = null,
+            Color textSelectionHandleColor = null,
+            Color backgroundColor = null,
+            Color dialogBackgroundColor = null,
+            Color indicatorColor = null,
+            Color hintColor = null,
+            Color errorColor = null,
+            Color toggleableActiveColor = null,
+            string fontFamily = null,
+            TextTheme textTheme = null,
+            TextTheme primaryTextTheme = null,
+            TextTheme accentTextTheme = null,
+            IconThemeData iconTheme = null,
+            IconThemeData primaryIconTheme = null,
+            IconThemeData accentIconTheme = null,
+            MaterialTapTargetSize? materialTapTargetSize = null,
+            ColorScheme colorScheme = null,
+            Typography typography = null
+        ) {
+            brightness = brightness ?? Brightness.light;
+            bool isDark = brightness == Brightness.dark;
+
+            primarySwatch = primarySwatch ?? Colors.blue;
+            primaryColor = primaryColor ?? (isDark ? Colors.grey[900] : primarySwatch);
+            primaryColorBrightness = primaryColorBrightness ?? estimateBrightnessForColor(primaryColor);
+            primaryColorLight = primaryColorLight ?? (isDark ? Colors.grey[500] : primarySwatch[100]);
+            primaryColorDark = primaryColorDark ?? (isDark ? Colors.black : primarySwatch[700]);
+            bool primaryIsDark = primaryColorBrightness == Brightness.dark;
+            toggleableActiveColor = toggleableActiveColor ??
+                                    (isDark ? Colors.tealAccent[200] : (accentColor ?? primarySwatch[600]));
+
+            accentColor = accentColor ?? (isDark ? Colors.tealAccent[200] : primarySwatch[500]);
+            accentColorBrightness = accentColorBrightness ?? estimateBrightnessForColor(accentColor);
+            bool accentIsDark = accentColorBrightness == Brightness.dark;
+
+            canvasColor = canvasColor ?? (isDark ? Colors.grey[850] : Colors.grey[50]);
+            scaffoldBackgroundColor = scaffoldBackgroundColor ?? canvasColor;
+            bottomAppBarColor = bottomAppBarColor ?? (isDark ? Colors.grey[800] : Colors.white);
+            cardColor = cardColor ?? (isDark ? Colors.grey[800] : Colors.white);
+            dividerColor = dividerColor ?? (isDark ? new Color(0x1FFFFFFF) : new Color(0x1F000000));
+
+            colorScheme = colorScheme ?? ColorScheme.fromSwatch(
+                              primarySwatch: primarySwatch,
+                              primaryColorDark: primaryColorDark,
+                              accentColor: accentColor,
+                              cardColor: cardColor,
+                              backgroundColor: backgroundColor,
+                              errorColor: errorColor,
+                              brightness: brightness);
+
+            splashFactory = splashFactory ?? InkSplash.splashFactory;
+            selectedRowColor = selectedRowColor ?? Colors.grey[100];
+            unselectedWidgetColor = unselectedWidgetColor ?? (isDark ? Colors.white70 : Colors.black54);
+            secondaryHeaderColor = secondaryHeaderColor ?? (isDark ? Colors.grey[700] : primarySwatch[50]);
+            textSelectionColor = textSelectionColor ?? (isDark ? accentColor : primarySwatch[200]);
+            cursorColor = cursorColor ?? Color.fromRGBO(66, 133, 244, 1.0);
+            textSelectionHandleColor =
+                textSelectionHandleColor ?? (isDark ? Colors.tealAccent[400] : primarySwatch[300]);
+
+            backgroundColor = backgroundColor ?? (isDark ? Colors.grey[700] : primarySwatch[200]);
+            dialogBackgroundColor = dialogBackgroundColor ?? (isDark ? Colors.grey[800] : Colors.white);
+            indicatorColor = indicatorColor ?? (accentColor == primaryColor ? Colors.white : accentColor);
+            hintColor = hintColor ?? (isDark ? new Color(0x80FFFFFF) : new Color(0x8A000000));
+            errorColor = errorColor ?? Colors.red[700];
+
+            primaryIconTheme = primaryIconTheme ??
+                               (primaryIsDark
+                                   ? new IconThemeData(color: Colors.white)
+                                   : new IconThemeData(color: Colors.black));
+            accentIconTheme = accentIconTheme ??
+                              (accentIsDark
+                                  ? new IconThemeData(color: Colors.white)
+                                  : new IconThemeData(color: Colors.black));
+            iconTheme = iconTheme ??
+                        (isDark ? new IconThemeData(color: Colors.white) : new IconThemeData(color: Colors.black87));
+
+            typography = typography ?? new Typography();
+            TextTheme defaultTextTheme = isDark ? typography.white : typography.black;
+            textTheme = defaultTextTheme.merge(textTheme);
+            TextTheme defaultPrimaryTextTheme = primaryIsDark ? typography.white : typography.black;
+            primaryTextTheme = defaultPrimaryTextTheme.merge(primaryTextTheme);
+            TextTheme defaultAccentTextTheme = accentIsDark ? typography.white : typography.black;
+            accentTextTheme = defaultAccentTextTheme.merge(accentTextTheme);
+            materialTapTargetSize = materialTapTargetSize ?? MaterialTapTargetSize.padded;
+            if (fontFamily != null) {
+                textTheme = textTheme.apply(fontFamily: fontFamily);
+                primaryTextTheme = primaryTextTheme.apply(fontFamily: fontFamily);
+                accentTextTheme = accentTextTheme.apply(fontFamily: fontFamily);
+            }
+
+            buttonColor = buttonColor ?? (isDark ? primarySwatch[600] : Colors.grey[300]);
+            buttonTheme = buttonTheme ?? new ButtonThemeData(
+                              colorScheme: colorScheme,
+                              buttonColor: buttonColor,
+                              disabledColor: disabledColor,
+                              highlightColor: highlightColor,
+                              splashColor: splashColor,
+                              materialTapTargetSize: materialTapTargetSize);
+            disabledColor = disabledColor ?? (isDark ? Colors.white30 : Colors.black38);
+            highlightColor = highlightColor ??
+                             (isDark
+                                 ? ThemeDataUtils._kDarkThemeHighlightColor
+                                 : ThemeDataUtils._kLightThemeHighlightColor);
+            splashColor = splashColor ??
+                          (isDark
+                              ? ThemeDataUtils._kDarkThemeSplashColor
+                              : ThemeDataUtils._kLightThemeSplashColor);
+
+            D.assert(brightness != null);
+            D.assert(primaryColor != null);
+            D.assert(primaryColorBrightness != null);
+            D.assert(primaryColorLight != null);
+            D.assert(primaryColorDark != null);
+            D.assert(accentColor != null);
+            D.assert(accentColorBrightness != null);
+            D.assert(canvasColor != null);
+            D.assert(scaffoldBackgroundColor != null);
+            D.assert(bottomAppBarColor != null);
+            D.assert(cardColor != null);
+            D.assert(dividerColor != null);
+            D.assert(highlightColor != null);
+            D.assert(splashColor != null);
+            D.assert(splashFactory != null);
+            D.assert(selectedRowColor != null);
+            D.assert(unselectedWidgetColor != null);
+            D.assert(disabledColor != null);
+            D.assert(toggleableActiveColor != null);
+            D.assert(buttonTheme != null);
+            D.assert(secondaryHeaderColor != null);
+            D.assert(textSelectionColor != null);
+            D.assert(cursorColor != null);
+            D.assert(textSelectionHandleColor != null);
+            D.assert(backgroundColor != null);
+            D.assert(dialogBackgroundColor != null);
+            D.assert(indicatorColor != null);
+            D.assert(hintColor != null);
+            D.assert(errorColor != null);
+            D.assert(textTheme != null);
+            D.assert(primaryTextTheme != null);
+            D.assert(accentTextTheme != null);
+            D.assert(iconTheme != null);
+            D.assert(primaryIconTheme != null);
+            D.assert(accentIconTheme != null);
+            D.assert(materialTapTargetSize != null);
+            D.assert(colorScheme != null);
+            D.assert(typography != null);
+
+            D.assert(buttonColor != null);
+
+            this.brightness = brightness ?? Brightness.light;
+            this.primaryColor = primaryColor;
+            this.primaryColorBrightness = primaryColorBrightness ?? Brightness.light;
+            this.primaryColorLight = primaryColorLight;
+            this.primaryColorDark = primaryColorDark;
+            this.canvasColor = canvasColor;
+            this.accentColor = accentColor;
+            this.accentColorBrightness = accentColorBrightness ?? Brightness.light;
+            this.scaffoldBackgroundColor = scaffoldBackgroundColor;
+            this.bottomAppBarColor = bottomAppBarColor;
+            this.cardColor = cardColor;
+            this.dividerColor = dividerColor;
+            this.highlightColor = highlightColor;
+            this.splashColor = splashColor;
+            this.splashFactory = splashFactory;
+            this.selectedRowColor = selectedRowColor;
+            this.unselectedWidgetColor = unselectedWidgetColor;
+            this.disabledColor = disabledColor;
+            this.buttonTheme = buttonTheme;
+            this.buttonColor = buttonColor;
+            this.secondaryHeaderColor = secondaryHeaderColor;
+            this.textSelectionColor = textSelectionColor;
+            this.cursorColor = cursorColor;
+            this.textSelectionHandleColor = textSelectionHandleColor;
+            this.backgroundColor = backgroundColor;
+            this.dialogBackgroundColor = dialogBackgroundColor;
+            this.indicatorColor = indicatorColor;
+            this.hintColor = hintColor;
+            this.errorColor = errorColor;
+            this.toggleableActiveColor = toggleableActiveColor;
+            this.textTheme = textTheme;
+            this.primaryTextTheme = primaryTextTheme;
+            this.accentTextTheme = accentTextTheme;
+            this.iconTheme = iconTheme;
+            this.primaryIconTheme = primaryIconTheme;
+            this.accentIconTheme = accentIconTheme;
+            this.materialTapTargetSize = materialTapTargetSize ?? MaterialTapTargetSize.padded;
+            this.colorScheme = colorScheme;
+            this.typography = typography;
+        }
+
+        public static ThemeData raw(
+            Brightness? brightness,
+            Color primaryColor,
+            Brightness? primaryColorBrightness,
+            Color primaryColorLight,
+            Color primaryColorDark,
+            Color canvasColor,
+            Color accentColor,
+            Brightness? accentColorBrightness,
+            Color scaffoldBackgroundColor,
+            Color bottomAppBarColor,
+            Color cardColor,
+            Color dividerColor,
+            Color highlightColor,
+            Color splashColor,
+            InteractiveInkFeatureFactory splashFactory,
+            Color selectedRowColor,
+            Color unselectedWidgetColor,
+            Color disabledColor,
+            ButtonThemeData buttonTheme,
+            Color buttonColor,
+            Color secondaryHeaderColor,
+            Color textSelectionColor,
+            Color cursorColor,
+            Color textSelectionHandleColor,
+            Color backgroundColor,
+            Color dialogBackgroundColor,
+            Color indicatorColor,
+            Color hintColor,
+            Color errorColor,
+            Color toggleableActiveColor,
+            TextTheme textTheme,
+            TextTheme primaryTextTheme,
+            TextTheme accentTextTheme,
+            IconThemeData iconTheme,
+            IconThemeData primaryIconTheme,
+            IconThemeData accentIconTheme,
+            MaterialTapTargetSize materialTapTargetSize,
+            ColorScheme colorScheme,
+            Typography typography
+        ) {
+            D.assert(brightness != null);
+            D.assert(primaryColor != null);
+            D.assert(primaryColorBrightness != null);
+            D.assert(primaryColorLight != null);
+            D.assert(primaryColorDark != null);
+            D.assert(accentColor != null);
+            D.assert(accentColorBrightness != null);
+            D.assert(canvasColor != null);
+            D.assert(scaffoldBackgroundColor != null);
+            D.assert(bottomAppBarColor != null);
+            D.assert(cardColor != null);
+            D.assert(dividerColor != null);
+            D.assert(highlightColor != null);
+            D.assert(splashColor != null);
+            D.assert(splashFactory != null);
+            D.assert(selectedRowColor != null);
+            D.assert(unselectedWidgetColor != null);
+            D.assert(disabledColor != null);
+            D.assert(toggleableActiveColor != null);
+            D.assert(buttonTheme != null);
+            D.assert(secondaryHeaderColor != null);
+            D.assert(textSelectionColor != null);
+            D.assert(cursorColor != null);
+            D.assert(textSelectionHandleColor != null);
+            D.assert(backgroundColor != null);
+            D.assert(dialogBackgroundColor != null);
+            D.assert(indicatorColor != null);
+            D.assert(hintColor != null);
+            D.assert(errorColor != null);
+            D.assert(textTheme != null);
+            D.assert(primaryTextTheme != null);
+            D.assert(accentTextTheme != null);
+            D.assert(iconTheme != null);
+            D.assert(primaryIconTheme != null);
+            D.assert(accentIconTheme != null);
+            D.assert(materialTapTargetSize != null);
+            D.assert(colorScheme != null);
+            D.assert(typography != null);
+
+            D.assert(buttonColor != null);
+
+            return new ThemeData(
+                brightness: brightness,
+                primaryColor: primaryColor,
+                primaryColorBrightness: primaryColorBrightness,
+                primaryColorLight: primaryColorLight,
+                primaryColorDark: primaryColorDark,
+                accentColor: accentColor,
+                accentColorBrightness: accentColorBrightness,
+                canvasColor: canvasColor,
+                scaffoldBackgroundColor: scaffoldBackgroundColor,
+                bottomAppBarColor: bottomAppBarColor,
+                cardColor: cardColor,
+                dividerColor: dividerColor,
+                highlightColor: highlightColor,
+                splashColor: splashColor,
+                splashFactory: splashFactory,
+                selectedRowColor: selectedRowColor,
+                unselectedWidgetColor: unselectedWidgetColor,
+                disabledColor: disabledColor,
+                buttonTheme: buttonTheme,
+                buttonColor: buttonColor,
+                toggleableActiveColor: toggleableActiveColor,
+                secondaryHeaderColor: secondaryHeaderColor,
+                textSelectionColor: textSelectionColor,
+                cursorColor: cursorColor,
+                textSelectionHandleColor: textSelectionHandleColor,
+                backgroundColor: backgroundColor,
+                dialogBackgroundColor: dialogBackgroundColor,
+                indicatorColor: indicatorColor,
+                hintColor: hintColor,
+                errorColor: errorColor,
+                textTheme: textTheme,
+                primaryTextTheme: primaryTextTheme,
+                accentTextTheme: accentTextTheme,
+                iconTheme: iconTheme,
+                primaryIconTheme: primaryIconTheme,
+                accentIconTheme: accentIconTheme,
+                materialTapTargetSize: materialTapTargetSize,
+                colorScheme: colorScheme,
+                typography: typography);
+        }
+
+        public static ThemeData light() => new ThemeData(brightness: Brightness.light);
+
+        public static ThemeData dark() => new ThemeData(brightness: Brightness.dark);
+
+        public static ThemeData fallback() => light();
+
+
+        public readonly Brightness brightness;
+
+        public readonly Color primaryColor;
+
+        public readonly Brightness primaryColorBrightness;
+
+        public readonly Color primaryColorLight;
+
+        public readonly Color primaryColorDark;
+
+        public readonly Color canvasColor;
+
+        public readonly Color accentColor;
+
+        public readonly Brightness accentColorBrightness;
+
+        public readonly Color scaffoldBackgroundColor;
+
+        public readonly Color bottomAppBarColor;
+
+        public readonly Color cardColor;
+
+        public readonly Color dividerColor;
+
+        public readonly Color highlightColor;
+
+        public readonly Color splashColor;
+
+        public readonly InteractiveInkFeatureFactory splashFactory;
+
+        public readonly Color selectedRowColor;
+
+        public readonly Color unselectedWidgetColor;
+
+        public readonly Color disabledColor;
+
+        public readonly ButtonThemeData buttonTheme;
+
+        public readonly Color buttonColor;
+
+        public readonly Color secondaryHeaderColor;
+
+        public readonly Color textSelectionColor;
+
+        public readonly Color cursorColor;
+
+        public readonly Color textSelectionHandleColor;
+
+        public readonly Color backgroundColor;
+
+        public readonly Color dialogBackgroundColor;
+
+        public readonly Color indicatorColor;
+
+        public readonly Color hintColor;
+
+        public readonly Color errorColor;
+
+        public readonly Color toggleableActiveColor;
+
+        public readonly TextTheme textTheme;
+
+        public readonly TextTheme primaryTextTheme;
+
+        public readonly TextTheme accentTextTheme;
+
+        public readonly IconThemeData iconTheme;
+
+        public readonly IconThemeData primaryIconTheme;
+
+        public readonly IconThemeData accentIconTheme;
+
+        public readonly MaterialTapTargetSize materialTapTargetSize;
+
+        public readonly ColorScheme colorScheme;
+
+        public readonly Typography typography;
+
+        public ThemeData copyWith(
+            Brightness? brightness,
+            Color primaryColor,
+            Brightness? primaryColorBrightness,
+            Color primaryColorLight,
+            Color primaryColorDark,
+            Color accentColor,
+            Brightness? accentColorBrightness,
+            Color canvasColor,
+            Color scaffoldBackgroundColor,
+            Color bottomAppBarColor,
+            Color cardColor,
+            Color dividerColor,
+            Color highlightColor,
+            Color splashColor,
+            InteractiveInkFeatureFactory splashFactory,
+            Color selectedRowColor,
+            Color unselectedWidgetColor,
+            Color disabledColor,
+            ButtonThemeData buttonTheme,
+            Color buttonColor,
+            Color secondaryHeaderColor,
+            Color textSelectionColor,
+            Color cursorColor,
+            Color textSelectionHandleColor,
+            Color backgroundColor,
+            Color dialogBackgroundColor,
+            Color indicatorColor,
+            Color hintColor,
+            Color errorColor,
+            Color toggleableActiveColor,
+            TextTheme textTheme,
+            TextTheme primaryTextTheme,
+            TextTheme accentTextTheme,
+            IconThemeData iconTheme,
+            IconThemeData primaryIconTheme,
+            IconThemeData accentIconTheme,
+            MaterialTapTargetSize? materialTapTargetSize,
+            ColorScheme colorScheme,
+            Typography typography
+        ) {
+            return raw(
+                brightness: brightness ?? this.brightness,
+                primaryColor: primaryColor ?? this.primaryColor,
+                primaryColorBrightness: primaryColorBrightness ?? this.primaryColorBrightness,
+                primaryColorLight: primaryColorLight ?? this.primaryColorLight,
+                primaryColorDark: primaryColorDark ?? this.primaryColorDark,
+                accentColor: accentColor ?? this.accentColor,
+                accentColorBrightness: accentColorBrightness ?? this.accentColorBrightness,
+                canvasColor: canvasColor ?? this.canvasColor,
+                scaffoldBackgroundColor: scaffoldBackgroundColor ?? this.scaffoldBackgroundColor,
+                bottomAppBarColor: bottomAppBarColor ?? this.bottomAppBarColor,
+                cardColor: cardColor ?? this.cardColor,
+                dividerColor: dividerColor ?? this.dividerColor,
+                highlightColor: highlightColor ?? this.highlightColor,
+                splashColor: splashColor ?? this.splashColor,
+                splashFactory: splashFactory ?? this.splashFactory,
+                selectedRowColor: selectedRowColor ?? this.selectedRowColor,
+                unselectedWidgetColor: unselectedWidgetColor ?? this.unselectedWidgetColor,
+                disabledColor: disabledColor ?? this.disabledColor,
+                buttonTheme: buttonTheme ?? this.buttonTheme,
+                buttonColor: buttonColor ?? this.buttonColor,
+                secondaryHeaderColor: secondaryHeaderColor ?? this.secondaryHeaderColor,
+                textSelectionColor: textSelectionColor ?? this.textSelectionColor,
+                cursorColor: cursorColor ?? this.cursorColor,
+                textSelectionHandleColor: textSelectionHandleColor ?? this.textSelectionHandleColor,
+                backgroundColor: backgroundColor ?? this.backgroundColor,
+                dialogBackgroundColor: dialogBackgroundColor ?? this.dialogBackgroundColor,
+                indicatorColor: indicatorColor ?? this.indicatorColor,
+                hintColor: hintColor ?? this.hintColor,
+                errorColor: errorColor ?? this.errorColor,
+                toggleableActiveColor: toggleableActiveColor ?? this.toggleableActiveColor,
+                textTheme: textTheme ?? this.textTheme,
+                primaryTextTheme: primaryTextTheme ?? this.primaryTextTheme,
+                accentTextTheme: accentTextTheme ?? this.accentTextTheme,
+                iconTheme: iconTheme ?? this.iconTheme,
+                primaryIconTheme: primaryIconTheme ?? this.primaryIconTheme,
+                accentIconTheme: accentIconTheme ?? this.accentIconTheme,
+                materialTapTargetSize: materialTapTargetSize ?? this.materialTapTargetSize,
+                colorScheme: colorScheme ?? this.colorScheme,
+                typography: typography ?? this.typography
+            );
+        }
+
+
+        public static Brightness estimateBrightnessForColor(Color color) {
+            double relativeLuminance = color.computeLuminance();
+            double kThreshold = 0.15;
+            if ((relativeLuminance + 0.05) * (relativeLuminance + 0.05) > kThreshold)
+                return Brightness.light;
+            return Brightness.dark;
+        }
+
+        public static ThemeData lerp(ThemeData a, ThemeData b, double t) {
+            D.assert(a != null);
+            D.assert(b != null);
+            return raw(
+                brightness: t < 0.5 ? a.brightness : b.brightness,
+                primaryColor: Color.lerp(a.primaryColor, b.primaryColor, t),
+                primaryColorBrightness: t < 0.5 ? a.primaryColorBrightness : b.primaryColorBrightness,
+                primaryColorLight: Color.lerp(a.primaryColorLight, b.primaryColorLight, t),
+                primaryColorDark: Color.lerp(a.primaryColorDark, b.primaryColorDark, t),
+                canvasColor: Color.lerp(a.canvasColor, b.canvasColor, t),
+                accentColor: Color.lerp(a.accentColor, b.accentColor, t),
+                accentColorBrightness: t < 0.5 ? a.accentColorBrightness : b.accentColorBrightness,
+                scaffoldBackgroundColor: Color.lerp(a.scaffoldBackgroundColor, b.scaffoldBackgroundColor, t),
+                bottomAppBarColor: Color.lerp(a.bottomAppBarColor, b.bottomAppBarColor, t),
+                cardColor: Color.lerp(a.cardColor, b.cardColor, t),
+                dividerColor: Color.lerp(a.dividerColor, b.dividerColor, t),
+                highlightColor: Color.lerp(a.highlightColor, b.highlightColor, t),
+                splashColor: Color.lerp(a.splashColor, b.splashColor, t),
+                splashFactory: t < 0.5 ? a.splashFactory : b.splashFactory,
+                selectedRowColor: Color.lerp(a.selectedRowColor, b.selectedRowColor, t),
+                unselectedWidgetColor: Color.lerp(a.unselectedWidgetColor, b.unselectedWidgetColor, t),
+                disabledColor: Color.lerp(a.disabledColor, b.disabledColor, t),
+                buttonTheme: t < 0.5 ? a.buttonTheme : b.buttonTheme,
+                buttonColor: Color.lerp(a.buttonColor, b.buttonColor, t),
+                secondaryHeaderColor: Color.lerp(a.secondaryHeaderColor, b.secondaryHeaderColor, t),
+                textSelectionColor: Color.lerp(a.textSelectionColor, b.textSelectionColor, t),
+                cursorColor: Color.lerp(a.cursorColor, b.cursorColor, t),
+                textSelectionHandleColor: Color.lerp(a.textSelectionHandleColor, b.textSelectionHandleColor, t),
+                backgroundColor: Color.lerp(a.backgroundColor, b.backgroundColor, t),
+                dialogBackgroundColor: Color.lerp(a.dialogBackgroundColor, b.dialogBackgroundColor, t),
+                indicatorColor: Color.lerp(a.indicatorColor, b.indicatorColor, t),
+                hintColor: Color.lerp(a.hintColor, b.hintColor, t),
+                errorColor: Color.lerp(a.errorColor, b.errorColor, t),
+                toggleableActiveColor: Color.lerp(a.toggleableActiveColor, b.toggleableActiveColor, t),
+                textTheme: TextTheme.lerp(a.textTheme, b.textTheme, t),
+                primaryTextTheme: TextTheme.lerp(a.primaryTextTheme, b.primaryTextTheme, t),
+                accentTextTheme: TextTheme.lerp(a.accentTextTheme, b.accentTextTheme, t),
+                iconTheme: IconThemeData.lerp(a.iconTheme, b.iconTheme, t),
+                primaryIconTheme: IconThemeData.lerp(a.primaryIconTheme, b.primaryIconTheme, t),
+                accentIconTheme: IconThemeData.lerp(a.accentIconTheme, b.accentIconTheme, t),
+                materialTapTargetSize: t < 0.5 ? a.materialTapTargetSize : b.materialTapTargetSize,
+                colorScheme: ColorScheme.lerp(a.colorScheme, b.colorScheme, t),
+                typography: Typography.lerp(a.typography, b.typography, t)
+            );
+        }
+
+        public bool Equals(ThemeData other) {
+            if (ReferenceEquals(null, other)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, other)) {
+                return true;
+            }
+
+            return other.brightness == this.brightness &&
+                   other.primaryColor == this.primaryColor &&
+                   other.primaryColorBrightness == this.primaryColorBrightness &&
+                   other.primaryColorLight == this.primaryColorLight &&
+                   other.primaryColorDark == this.primaryColorDark &&
+                   other.accentColor == this.accentColor &&
+                   other.accentColorBrightness == this.accentColorBrightness &&
+                   other.canvasColor == this.canvasColor &&
+                   other.scaffoldBackgroundColor == this.scaffoldBackgroundColor &&
+                   other.bottomAppBarColor == this.bottomAppBarColor &&
+                   other.cardColor == this.cardColor &&
+                   other.dividerColor == this.dividerColor &&
+                   other.highlightColor == this.highlightColor &&
+                   other.splashColor == this.splashColor &&
+                   other.splashFactory == this.splashFactory &&
+                   other.selectedRowColor == this.selectedRowColor &&
+                   other.unselectedWidgetColor == this.unselectedWidgetColor &&
+                   other.disabledColor == this.disabledColor &&
+                   other.buttonTheme == this.buttonTheme &&
+                   other.buttonColor == this.buttonColor &&
+                   other.secondaryHeaderColor == this.secondaryHeaderColor &&
+                   other.textSelectionColor == this.textSelectionColor &&
+                   other.cursorColor == this.cursorColor &&
+                   other.textSelectionHandleColor == this.textSelectionHandleColor &&
+                   other.backgroundColor == this.backgroundColor &&
+                   other.dialogBackgroundColor == this.dialogBackgroundColor &&
+                   other.indicatorColor == this.indicatorColor &&
+                   other.hintColor == this.hintColor &&
+                   other.errorColor == this.errorColor &&
+                   other.textTheme == this.textTheme &&
+                   other.primaryTextTheme == this.primaryTextTheme &&
+                   other.accentTextTheme == this.accentTextTheme &&
+                   other.toggleableActiveColor == this.toggleableActiveColor &&
+                   other.iconTheme == this.iconTheme &&
+                   other.primaryIconTheme == this.primaryIconTheme &&
+                   other.accentIconTheme == this.accentIconTheme &&
+                   other.materialTapTargetSize == this.materialTapTargetSize &&
+                   other.colorScheme == this.colorScheme &&
+                   other.typography == this.typography;
+        }
+
+        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((ThemeData) obj);
+        }
+
+        public static bool operator ==(ThemeData left, ThemeData right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(ThemeData left, ThemeData right) {
+            return !Equals(left, right);
+        }
+
+        public override int GetHashCode() {
+            unchecked {
+                var hashCode = this.brightness.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.primaryColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.primaryColorBrightness.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.primaryColorLight.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.primaryColorDark.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.canvasColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.accentColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.accentColorBrightness.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.scaffoldBackgroundColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.bottomAppBarColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.cardColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.dividerColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.highlightColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.splashColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.splashFactory.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.selectedRowColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.unselectedWidgetColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.disabledColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.buttonTheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.buttonColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.secondaryHeaderColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.textSelectionColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.cursorColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.textSelectionHandleColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.backgroundColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.dialogBackgroundColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.indicatorColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.hintColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.errorColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.toggleableActiveColor.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.textTheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.primaryTextTheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.accentTextTheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.iconTheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.primaryIconTheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.accentIconTheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.materialTapTargetSize.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.colorScheme.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.typography.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            ThemeData defaultData = fallback();
+            properties.add(new EnumProperty<Brightness>("brightness", this.brightness,
+                defaultValue: defaultData.brightness));
+            properties.add(new DiagnosticsProperty<Color>("primaryColor", this.primaryColor,
+                defaultValue: defaultData.primaryColor));
+            properties.add(new EnumProperty<Brightness>("primaryColorBrightness", this.primaryColorBrightness,
+                defaultValue: defaultData.primaryColorBrightness));
+            properties.add(new DiagnosticsProperty<Color>("accentColor", this.accentColor,
+                defaultValue: defaultData.accentColor));
+            properties.add(new EnumProperty<Brightness>("accentColorBrightness", this.accentColorBrightness,
+                defaultValue: defaultData.accentColorBrightness));
+            properties.add(new DiagnosticsProperty<Color>("canvasColor", this.canvasColor,
+                defaultValue: defaultData.canvasColor));
+            properties.add(new DiagnosticsProperty<Color>("scaffoldBackgroundColor", this.scaffoldBackgroundColor,
+                defaultValue: defaultData.scaffoldBackgroundColor));
+            properties.add(new DiagnosticsProperty<Color>("bottomAppBarColor", this.bottomAppBarColor,
+                defaultValue: defaultData.bottomAppBarColor));
+            properties.add(new DiagnosticsProperty<Color>("cardColor", this.cardColor,
+                defaultValue: defaultData.cardColor));
+            properties.add(new DiagnosticsProperty<Color>("dividerColor", this.dividerColor,
+                defaultValue: defaultData.dividerColor));
+            properties.add(new DiagnosticsProperty<Color>("highlightColor", this.highlightColor,
+                defaultValue: defaultData.highlightColor));
+            properties.add(new DiagnosticsProperty<Color>("splashColor", this.splashColor,
+                defaultValue: defaultData.splashColor));
+            properties.add(new DiagnosticsProperty<Color>("selectedRowColor", this.selectedRowColor,
+                defaultValue: defaultData.selectedRowColor));
+            properties.add(new DiagnosticsProperty<Color>("unselectedWidgetColor", this.unselectedWidgetColor,
+                defaultValue: defaultData.unselectedWidgetColor));
+            properties.add(new DiagnosticsProperty<Color>("disabledColor", this.disabledColor,
+                defaultValue: defaultData.disabledColor));
+            properties.add(new DiagnosticsProperty<ButtonThemeData>("buttonTheme", this.buttonTheme));
+            properties.add(new DiagnosticsProperty<Color>("buttonColor", this.buttonColor,
+                defaultValue: defaultData.buttonColor));
+            properties.add(new DiagnosticsProperty<Color>("secondaryHeaderColor", this.secondaryHeaderColor,
+                defaultValue: defaultData.secondaryHeaderColor));
+            properties.add(new DiagnosticsProperty<Color>("textSelectionColor", this.textSelectionColor,
+                defaultValue: defaultData.textSelectionColor));
+            properties.add(new DiagnosticsProperty<Color>("cursorColor", this.cursorColor,
+                defaultValue: defaultData.cursorColor));
+            properties.add(new DiagnosticsProperty<Color>("textSelectionHandleColor", this.textSelectionHandleColor,
+                defaultValue: defaultData.textSelectionHandleColor));
+            properties.add(new DiagnosticsProperty<Color>("backgroundColor", this.backgroundColor,
+                defaultValue: defaultData.backgroundColor));
+            properties.add(new DiagnosticsProperty<Color>("dialogBackgroundColor", this.dialogBackgroundColor,
+                defaultValue: defaultData.dialogBackgroundColor));
+            properties.add(new DiagnosticsProperty<Color>("indicatorColor", this.indicatorColor,
+                defaultValue: defaultData.indicatorColor));
+            properties.add(new DiagnosticsProperty<Color>("hintColor", this.hintColor,
+                defaultValue: defaultData.hintColor));
+            properties.add(new DiagnosticsProperty<Color>("errorColor", this.errorColor,
+                defaultValue: defaultData.errorColor));
+            properties.add(new DiagnosticsProperty<TextTheme>("textTheme", this.textTheme));
+            properties.add(new DiagnosticsProperty<TextTheme>("primaryTextTheme", this.primaryTextTheme));
+            properties.add(new DiagnosticsProperty<TextTheme>("accentTextTheme", this.accentTextTheme));
+            properties.add(new DiagnosticsProperty<Color>("toggleableActiveColor", this.toggleableActiveColor,
+                defaultValue: defaultData.toggleableActiveColor));
+            properties.add(new DiagnosticsProperty<IconThemeData>("iconTheme", this.iconTheme));
+            properties.add(new DiagnosticsProperty<IconThemeData>("primaryIconTheme", this.primaryIconTheme));
+            properties.add(new DiagnosticsProperty<IconThemeData>("accentIconTheme", this.accentIconTheme));
+            properties.add(
+                new DiagnosticsProperty<MaterialTapTargetSize>("materialTapTargetSize", this.materialTapTargetSize));
+            properties.add(new DiagnosticsProperty<ColorScheme>("colorScheme", this.colorScheme,
+                defaultValue: defaultData.colorScheme));
+            properties.add(new DiagnosticsProperty<Typography>("typography", this.typography,
+                defaultValue: defaultData.typography));
+        }
+    }
+}

Runtime/material/theme_data.cs.meta

+fileFormatVersion: 2
+guid: 68fb5edae4e8440669205d4e5b27ea30
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/typography.cs

+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.ui;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+
+namespace Unity.UIWidgets.material {
+    public enum ScriptCategory {
+        englishLike,
+
+        dense,
+
+        tall
+    }
+
+
+    public class Typography : Diagnosticable {
+        public Typography(
+            TextTheme black = null,
+            TextTheme white = null,
+            TextTheme englishLike = null,
+            TextTheme dense = null,
+            TextTheme tall = null
+        ) {
+            black = black ?? blackMountainView;
+            white = white ?? whiteMountainView;
+            englishLike = englishLike ?? englishLike2014;
+            dense = dense ?? dense2014;
+            tall = tall ?? tall2014;
+
+            D.assert(black != null);
+            D.assert(white != null);
+            D.assert(englishLike != null);
+            D.assert(dense != null);
+            D.assert(tall != null);
+
+            this.black = black;
+            this.white = white;
+            this.englishLike = englishLike;
+            this.dense = dense;
+            this.tall = tall;
+        }
+
+
+        public readonly TextTheme black;
+
+        public readonly TextTheme white;
+
+        public readonly TextTheme englishLike;
+
+        public readonly TextTheme dense;
+
+        public readonly TextTheme tall;
+
+        public TextTheme geometryThemeFor(ScriptCategory category) {
+            switch (category) {
+                case ScriptCategory.englishLike:
+                    return this.englishLike;
+                case ScriptCategory.dense:
+                    return this.dense;
+                case ScriptCategory.tall:
+                    return this.tall;
+            }
+
+            return null;
+        }
+
+
+        public Typography copyWith(
+            TextTheme black = null,
+            TextTheme white = null,
+            TextTheme englishLike = null,
+            TextTheme dense = null,
+            TextTheme tall = null) {
+            return new Typography(
+                black: black ?? this.black,
+                white: white ?? this.white,
+                englishLike: englishLike ?? this.englishLike,
+                dense: dense ?? this.dense,
+                tall: tall ?? this.tall);
+        }
+
+        public static Typography lerp(Typography a, Typography b, double t) {
+            return new Typography(
+                black: TextTheme.lerp(a.black, b.black, t),
+                white: TextTheme.lerp(a.white, b.white, t),
+                englishLike: TextTheme.lerp(a.englishLike, b.englishLike, t),
+                dense: TextTheme.lerp(a.dense, b.dense, t),
+                tall: TextTheme.lerp(a.tall, b.tall, t)
+            );
+        }
+
+
+        public bool Equals(Typography other) {
+            if (ReferenceEquals(null, other)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, other)) {
+                return true;
+            }
+
+            return this.black == other.black
+                   && this.white == other.white
+                   && this.englishLike == other.englishLike
+                   && this.dense == other.dense
+                   && this.tall == other.tall;
+        }
+
+        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((Typography) obj);
+        }
+
+        public static bool operator ==(Typography left, Typography right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(Typography left, Typography right) {
+            return !Equals(left, right);
+        }
+
+        public override int GetHashCode() {
+            unchecked {
+                var hashCode = this.black.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.white.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.englishLike.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.dense.GetHashCode();
+                hashCode = (hashCode * 397) ^ this.tall.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            Typography defaultTypography = new Typography();
+            properties.add(
+                new DiagnosticsProperty<TextTheme>("black", this.black, defaultValue: defaultTypography.black));
+            properties.add(
+                new DiagnosticsProperty<TextTheme>("white", this.white, defaultValue: defaultTypography.white));
+            properties.add(new DiagnosticsProperty<TextTheme>("englishLike", this.englishLike,
+                defaultValue: defaultTypography.englishLike));
+            properties.add(
+                new DiagnosticsProperty<TextTheme>("dense", this.dense, defaultValue: defaultTypography.dense));
+            properties.add(new DiagnosticsProperty<TextTheme>("tall", this.tall, defaultValue: defaultTypography.tall));
+        }
+
+        public static readonly TextTheme blackMountainView = new TextTheme(
+            display4: new TextStyle(debugLabel: "blackMountainView display4", fontFamily: "Roboto", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            display3: new TextStyle(debugLabel: "blackMountainView display3", fontFamily: "Roboto", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            display2: new TextStyle(debugLabel: "blackMountainView display2", fontFamily: "Roboto", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            display1: new TextStyle(debugLabel: "blackMountainView display1", fontFamily: "Roboto", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            headline: new TextStyle(debugLabel: "blackMountainView headline", fontFamily: "Roboto", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            title: new TextStyle(debugLabel: "blackMountainView title", fontFamily: "Roboto", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            subhead: new TextStyle(debugLabel: "blackMountainView subhead", fontFamily: "Roboto", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            body2: new TextStyle(debugLabel: "blackMountainView body2", fontFamily: "Roboto", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            body1: new TextStyle(debugLabel: "blackMountainView body1", fontFamily: "Roboto", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            caption: new TextStyle(debugLabel: "blackMountainView caption", fontFamily: "Roboto", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            button: new TextStyle(debugLabel: "blackMountainView button", fontFamily: "Roboto", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            subtitle: new TextStyle(debugLabel: "blackMountainView subtitle", fontFamily: "Roboto", inherit: true,
+                color: Colors.black, decoration: TextDecoration.none),
+            overline: new TextStyle(debugLabel: "blackMountainView overline", fontFamily: "Roboto", inherit: true,
+                color: Colors.black, decoration: TextDecoration.none)
+        );
+
+        public static readonly TextTheme whiteMountainView = new TextTheme(
+            display4: new TextStyle(debugLabel: "whiteMountainView display4", fontFamily: "Roboto", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            display3: new TextStyle(debugLabel: "whiteMountainView display3", fontFamily: "Roboto", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            display2: new TextStyle(debugLabel: "whiteMountainView display2", fontFamily: "Roboto", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            display1: new TextStyle(debugLabel: "whiteMountainView display1", fontFamily: "Roboto", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            headline: new TextStyle(debugLabel: "whiteMountainView headline", fontFamily: "Roboto", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            title: new TextStyle(debugLabel: "whiteMountainView title", fontFamily: "Roboto", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            subhead: new TextStyle(debugLabel: "whiteMountainView subhead", fontFamily: "Roboto", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            body2: new TextStyle(debugLabel: "whiteMountainView body2", fontFamily: "Roboto", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            body1: new TextStyle(debugLabel: "whiteMountainView body1", fontFamily: "Roboto", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            caption: new TextStyle(debugLabel: "whiteMountainView caption", fontFamily: "Roboto", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            button: new TextStyle(debugLabel: "whiteMountainView button", fontFamily: "Roboto", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            subtitle: new TextStyle(debugLabel: "whiteMountainView subtitle", fontFamily: "Roboto", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            overline: new TextStyle(debugLabel: "whiteMountainView overline", fontFamily: "Roboto", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none)
+        );
+
+        public static readonly TextTheme blackCupertino = new TextTheme(
+            display4: new TextStyle(debugLabel: "blackCupertino display4", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            display3: new TextStyle(debugLabel: "blackCupertino display3", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            display2: new TextStyle(debugLabel: "blackCupertino display2", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            display1: new TextStyle(debugLabel: "blackCupertino display1", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            headline: new TextStyle(debugLabel: "blackCupertino headline", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            title: new TextStyle(debugLabel: "blackCupertino title", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            subhead: new TextStyle(debugLabel: "blackCupertino subhead", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            body2: new TextStyle(debugLabel: "blackCupertino body2", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            body1: new TextStyle(debugLabel: "blackCupertino body1", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            caption: new TextStyle(debugLabel: "blackCupertino caption", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.black54, decoration: TextDecoration.none),
+            button: new TextStyle(debugLabel: "blackCupertino button", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.black87, decoration: TextDecoration.none),
+            subtitle: new TextStyle(debugLabel: "blackCupertino subtitle", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.black, decoration: TextDecoration.none),
+            overline: new TextStyle(debugLabel: "blackCupertino overline", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.black, decoration: TextDecoration.none)
+        );
+
+        public static readonly TextTheme whiteCupertino = new TextTheme(
+            display4: new TextStyle(debugLabel: "whiteCupertino display4", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            display3: new TextStyle(debugLabel: "whiteCupertino display3", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            display2: new TextStyle(debugLabel: "whiteCupertino display2", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            display1: new TextStyle(debugLabel: "whiteCupertino display1", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            headline: new TextStyle(debugLabel: "whiteCupertino headline", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            title: new TextStyle(debugLabel: "whiteCupertino title", fontFamily: ".SF UI Display", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            subhead: new TextStyle(debugLabel: "whiteCupertino subhead", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            body2: new TextStyle(debugLabel: "whiteCupertino body2", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            body1: new TextStyle(debugLabel: "whiteCupertino body1", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            caption: new TextStyle(debugLabel: "whiteCupertino caption", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.white70, decoration: TextDecoration.none),
+            button: new TextStyle(debugLabel: "whiteCupertino button", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            subtitle: new TextStyle(debugLabel: "whiteCupertino subtitle", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none),
+            overline: new TextStyle(debugLabel: "whiteCupertino overline", fontFamily: ".SF UI Text", inherit: true,
+                color: Colors.white, decoration: TextDecoration.none)
+        );
+
+
+        public static readonly TextTheme englishLike2014 = new TextTheme(
+            display4: new TextStyle(debugLabel: "englishLike display4 2014", inherit: false, fontSize: 112.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            display3: new TextStyle(debugLabel: "englishLike display3 2014", inherit: false, fontSize: 56.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            display2: new TextStyle(debugLabel: "englishLike display2 2014", inherit: false, fontSize: 45.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            display1: new TextStyle(debugLabel: "englishLike display1 2014", inherit: false, fontSize: 34.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            headline: new TextStyle(debugLabel: "englishLike headline 2014", inherit: false, fontSize: 24.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            title: new TextStyle(debugLabel: "englishLike title 2014", inherit: false, fontSize: 20.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            subhead: new TextStyle(debugLabel: "englishLike subhead 2014", inherit: false, fontSize: 16.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            body2: new TextStyle(debugLabel: "englishLike body2 2014", inherit: false, fontSize: 14.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            body1: new TextStyle(debugLabel: "englishLike body1 2014", inherit: false, fontSize: 14.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            caption: new TextStyle(debugLabel: "englishLike caption 2014", inherit: false, fontSize: 12.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            button: new TextStyle(debugLabel: "englishLike button 2014", inherit: false, fontSize: 14.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            subtitle: new TextStyle(debugLabel: "englishLike subtitle 2014", inherit: false, fontSize: 14.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: 0.1),
+            overline: new TextStyle(debugLabel: "englishLike overline 2014", inherit: false, fontSize: 10.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: 1.5)
+        );
+
+        public static readonly TextTheme englishLike2018 = new TextTheme(
+            display4: new TextStyle(debugLabel: "englishLike display4 2018", fontSize: 96.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: -1.5),
+            display3: new TextStyle(debugLabel: "englishLike display3 2018", fontSize: 60.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: -0.5),
+            display2: new TextStyle(debugLabel: "englishLike display2 2018", fontSize: 48.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: 0.0),
+            display1: new TextStyle(debugLabel: "englishLike display1 2018", fontSize: 34.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: 0.25),
+            headline: new TextStyle(debugLabel: "englishLike headline 2018", fontSize: 24.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: 0.0),
+            title: new TextStyle(debugLabel: "englishLike title 2018", fontSize: 20.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic, letterSpacing: 0.15),
+            subhead: new TextStyle(debugLabel: "englishLike subhead 2018", fontSize: 16.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic, letterSpacing: 0.15),
+            body2: new TextStyle(debugLabel: "englishLike body2 2018", fontSize: 14.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic, letterSpacing: 0.25),
+            body1: new TextStyle(debugLabel: "englishLike body1 2018", fontSize: 16.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic, letterSpacing: 0.5),
+            button: new TextStyle(debugLabel: "englishLike button 2018", fontSize: 14.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic, letterSpacing: 0.75),
+            caption: new TextStyle(debugLabel: "englishLike caption 2018", fontSize: 12.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic, letterSpacing: 0.4),
+            subtitle: new TextStyle(debugLabel: "englishLike subtitle 2018", fontSize: 14.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: 0.1),
+            overline: new TextStyle(debugLabel: "englishLike overline 2018", fontSize: 10.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic, letterSpacing: 1.5)
+        );
+
+        public static readonly TextTheme dense2014 = new TextTheme(
+            display4: new TextStyle(debugLabel: "dense display4 2014", inherit: false, fontSize: 112.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            display3: new TextStyle(debugLabel: "dense display3 2014", inherit: false, fontSize: 56.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            display2: new TextStyle(debugLabel: "dense display2 2014", inherit: false, fontSize: 45.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            display1: new TextStyle(debugLabel: "dense display1 2014", inherit: false, fontSize: 34.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            headline: new TextStyle(debugLabel: "dense headline 2014", inherit: false, fontSize: 24.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            title: new TextStyle(debugLabel: "dense title 2014", inherit: false, fontSize: 21.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            subhead: new TextStyle(debugLabel: "dense subhead 2014", inherit: false, fontSize: 17.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            body2: new TextStyle(debugLabel: "dense body2 2014", inherit: false, fontSize: 15.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            body1: new TextStyle(debugLabel: "dense body1 2014", inherit: false, fontSize: 15.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            caption: new TextStyle(debugLabel: "dense caption 2014", inherit: false, fontSize: 13.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            button: new TextStyle(debugLabel: "dense button 2014", inherit: false, fontSize: 15.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            subtitle: new TextStyle(debugLabel: "dense subtitle 2014", inherit: false, fontSize: 15.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic),
+            overline: new TextStyle(debugLabel: "dense overline 2014", inherit: false, fontSize: 11.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.ideographic)
+        );
+
+        public static readonly TextTheme dense2018 = new TextTheme(
+            display4: new TextStyle(debugLabel: "dense display4 2018", fontSize: 96.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            display3: new TextStyle(debugLabel: "dense display3 2018", fontSize: 60.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            display2: new TextStyle(debugLabel: "dense display2 2018", fontSize: 48.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            display1: new TextStyle(debugLabel: "dense display1 2018", fontSize: 34.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            headline: new TextStyle(debugLabel: "dense headline 2018", fontSize: 24.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            title: new TextStyle(debugLabel: "dense title 2018", fontSize: 21.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            subhead: new TextStyle(debugLabel: "dense subhead 2018", fontSize: 17.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            body2: new TextStyle(debugLabel: "dense body2 2018", fontSize: 17.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            body1: new TextStyle(debugLabel: "dense body1 2018", fontSize: 15.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            caption: new TextStyle(debugLabel: "dense caption 2018", fontSize: 13.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            button: new TextStyle(debugLabel: "dense button 2018", fontSize: 15.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            subtitle: new TextStyle(debugLabel: "dense subtitle 2018", fontSize: 15.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic),
+            overline: new TextStyle(debugLabel: "dense overline 2018", fontSize: 11.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.ideographic)
+        );
+
+
+        public static readonly TextTheme tall2014 = new TextTheme(
+            display4: new TextStyle(debugLabel: "tall display4 2014", inherit: false, fontSize: 112.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            display3: new TextStyle(debugLabel: "tall display3 2014", inherit: false, fontSize: 56.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            display2: new TextStyle(debugLabel: "tall display2 2014", inherit: false, fontSize: 45.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            display1: new TextStyle(debugLabel: "tall display1 2014", inherit: false, fontSize: 34.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            headline: new TextStyle(debugLabel: "tall headline 2014", inherit: false, fontSize: 24.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            title: new TextStyle(debugLabel: "tall title 2014", inherit: false, fontSize: 21.0,
+                fontWeight: FontWeight.w700, textBaseline: TextBaseline.alphabetic),
+            subhead: new TextStyle(debugLabel: "tall subhead 2014", inherit: false, fontSize: 17.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            body2: new TextStyle(debugLabel: "tall body2 2014", inherit: false, fontSize: 15.0,
+                fontWeight: FontWeight.w700, textBaseline: TextBaseline.alphabetic),
+            body1: new TextStyle(debugLabel: "tall body1 2014", inherit: false, fontSize: 15.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            caption: new TextStyle(debugLabel: "tall caption 2014", inherit: false, fontSize: 13.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            button: new TextStyle(debugLabel: "tall button 2014", inherit: false, fontSize: 15.0,
+                fontWeight: FontWeight.w700, textBaseline: TextBaseline.alphabetic),
+            subtitle: new TextStyle(debugLabel: "tall subtitle 2014", inherit: false, fontSize: 15.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic),
+            overline: new TextStyle(debugLabel: "tall overline 2014", inherit: false, fontSize: 11.0,
+                fontWeight: FontWeight.w400, textBaseline: TextBaseline.alphabetic)
+        );
+
+        public static readonly TextTheme tall2018 = new TextTheme(
+            display4: new TextStyle(debugLabel: "tall display4 2018", fontSize: 96.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            display3: new TextStyle(debugLabel: "tall display3 2018", fontSize: 60.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            display2: new TextStyle(debugLabel: "tall display2 2018", fontSize: 48.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            display1: new TextStyle(debugLabel: "tall display1 2018", fontSize: 34.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            headline: new TextStyle(debugLabel: "tall headline 2018", fontSize: 24.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            title: new TextStyle(debugLabel: "tall title 2018", fontSize: 21.0, fontWeight: FontWeight.w700,
+                textBaseline: TextBaseline.alphabetic),
+            subhead: new TextStyle(debugLabel: "tall subhead 2018", fontSize: 17.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            body2: new TextStyle(debugLabel: "tall body2 2018", fontSize: 17.0, fontWeight: FontWeight.w700,
+                textBaseline: TextBaseline.alphabetic),
+            body1: new TextStyle(debugLabel: "tall body1 2018", fontSize: 15.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            button: new TextStyle(debugLabel: "tall button 2018", fontSize: 15.0, fontWeight: FontWeight.w700,
+                textBaseline: TextBaseline.alphabetic),
+            caption: new TextStyle(debugLabel: "tall caption 2018", fontSize: 13.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            subtitle: new TextStyle(debugLabel: "tall subtitle 2018", fontSize: 15.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic),
+            overline: new TextStyle(debugLabel: "tall overline 2018", fontSize: 11.0, fontWeight: FontWeight.w400,
+                textBaseline: TextBaseline.alphabetic)
+        );
+    }
+}

Runtime/material/typography.cs.meta

+fileFormatVersion: 2
+guid: a7dbdefd2b4fd44dd9ff8d23eb224a31
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/material/utils.cs

+using System;
+using System.Collections.Generic;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.material {
+    public static class ThemeDataUtils {
+        public static readonly Color _kLightThemeHighlightColor = new Color(0x66BCBCBC);
+
+        public static readonly Color _kLightThemeSplashColor = new Color(0x66C8C8C8);
+
+        public static readonly Color _kDarkThemeHighlightColor = new Color(0x40CCCCCC);
+
+        public static readonly Color _kDarkThemeSplashColor = new Color(0x40CCCCCC);
+    }
+
+    public static class ThemeUtils {
+        public static readonly TimeSpan kThemeAnimationDuration = new TimeSpan(0, 0, 0, 0, 200);
+    }
+
+    public static class MaterialConstantsUtils {
+        public static readonly Dictionary<MaterialType, BorderRadius> kMaterialEdges =
+            new Dictionary<MaterialType, BorderRadius> {
+                {MaterialType.canvas, null},
+                {MaterialType.card, BorderRadius.circular(2.0)},
+                {MaterialType.circle, null},
+                {MaterialType.button, BorderRadius.circular(2.0)},
+                {MaterialType.transparency, null}
+            };
+    }
+
+    public static class InkHighlightUtils {
+        public static readonly TimeSpan _kHighlightFadeDuration = new TimeSpan(0, 0, 0, 0, 200);
+    }
+
+    public static class InkSplashUtils {
+        public static readonly TimeSpan _kUnconfirmedSplashDuration = new TimeSpan(0, 0, 0, 1, 0);
+
+        public static readonly TimeSpan _kSplashFadeDuration = new TimeSpan(0, 0, 0, 0, 200);
+
+        public const double _kSplashInitialSize = 0.0;
+
+        public const double _kSplashConfirmedVelocity = 1.0;
+
+        public static RectCallback _getClipCallback(RenderBox referenceBox, bool containedInkWell,
+            RectCallback rectCallback) {
+            if (rectCallback != null) {
+                D.assert(containedInkWell);
+                return rectCallback;
+            }
+
+            if (containedInkWell)
+                return () => Offset.zero & referenceBox.size;
+            return null;
+        }
+
+        public static double _getTargetRadius(RenderBox referenceBox, bool containedInkWell, RectCallback rectCallback,
+            Offset position) {
+            if (containedInkWell) {
+                Size size = rectCallback != null ? rectCallback().size : referenceBox.size;
+                return _getSplashRadiusForPositionInSize(size, position);
+            }
+
+            return Material.defaultSplashRadius;
+        }
+
+        static double _getSplashRadiusForPositionInSize(Size bounds, Offset position) {
+            double d1 = (position - bounds.topLeft(Offset.zero)).distance;
+            double d2 = (position - bounds.topRight(Offset.zero)).distance;
+            double d3 = (position - bounds.bottomLeft(Offset.zero)).distance;
+            double d4 = (position - bounds.bottomRight(Offset.zero)).distance;
+            return Math.Max(Math.Max(d1, d2), Math.Max(d3, d4)).ceil();
+        }
+    }
+}

Runtime/material/utils.cs.meta

+fileFormatVersion: 2
+guid: 39236c38160ee4c0e928e3658102fd71
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/painting/colors.cs

+using System.Collections.Generic;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.painting {
+    public class ColorSwatch<T> : Color {
+        public ColorSwatch(
+            long primary,
+            Dictionary<T, Color> swatch) : base(primary) {
+            this._swatch = swatch;
+        }
+
+        protected readonly Dictionary<T, Color> _swatch;
+
+        public Color this[T index] => this._swatch[index];
+
+
+        public bool Equals(ColorSwatch<T> other) {
+            if (ReferenceEquals(null, other)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, other)) {
+                return true;
+            }
+
+            return this.value == other.value && this._swatch == other._swatch;
+        }
+
+        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((ColorSwatch<T>) obj);
+        }
+
+        public static bool operator ==(ColorSwatch<T> left, ColorSwatch<T> right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(ColorSwatch<T> left, ColorSwatch<T> right) {
+            return !Equals(left, right);
+        }
+
+        public override int GetHashCode() {
+            unchecked {
+                var hashCode = (int) this.value;
+                hashCode = (hashCode * 397) ^ this._swatch.GetHashCode();
+                return hashCode;
+            }
+        }
+
+        public override string ToString() => this.GetType() + "(primary value: " + base.ToString() + ")";
+    }
+}

Runtime/painting/colors.cs.meta

+fileFormatVersion: 2
+guid: 8589f247e5dcd4f4e8cc22eee9fdbf36
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/service/system_chrome.cs

+using System.Collections.Generic;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.service {
+    public enum DeviceOrientation {
+        potraitUp,
+        landscapeLeft,
+        portraitDown,
+        landscapeRight
+    }
+
+
+    public class ApplicationSwitcherDescription {
+        public ApplicationSwitcherDescription(
+            string label = null,
+            int? primaryColor = null
+        ) {
+            this.label = label;
+            this.primaryColor = primaryColor;
+        }
+
+        public readonly string label;
+
+        public readonly int? primaryColor;
+    }
+
+    public enum SystemUiOverlay {
+        top,
+        bottom
+    }
+
+    public enum Brightness {
+        dark,
+        light
+    }
+
+    public class SystemUiOverlayStyle {
+        public SystemUiOverlayStyle(
+            Color systemNavigationBarColor = null,
+            Color systemNavigationBarDividerColor = null,
+            Brightness? systemNavigationBarIconBrightness = null,
+            Color statusBarColor = null,
+            Brightness? statusBarBrightness = null,
+            Brightness? statusBarIconBrightness = null
+        ) {
+            this.systemNavigationBarColor = systemNavigationBarColor;
+            this.systemNavigationBarDividerColor = systemNavigationBarDividerColor;
+            this.systemNavigationBarIconBrightness = systemNavigationBarIconBrightness;
+            this.statusBarColor = statusBarColor;
+            this.statusBarBrightness = statusBarBrightness;
+            this.statusBarIconBrightness = statusBarIconBrightness;
+        }
+
+        public readonly Color systemNavigationBarColor;
+
+        public readonly Color systemNavigationBarDividerColor;
+
+        public readonly Brightness? systemNavigationBarIconBrightness;
+
+        public readonly Color statusBarColor;
+
+        public readonly Brightness? statusBarBrightness;
+
+        public readonly Brightness? statusBarIconBrightness;
+
+        public static readonly SystemUiOverlayStyle light = new SystemUiOverlayStyle(
+            systemNavigationBarColor: new Color(0xFF000000),
+            systemNavigationBarDividerColor: null,
+            statusBarColor: null,
+            systemNavigationBarIconBrightness: Brightness.light,
+            statusBarIconBrightness: Brightness.light,
+            statusBarBrightness: Brightness.dark
+        );
+
+        public static readonly SystemUiOverlayStyle dark = new SystemUiOverlayStyle(
+            systemNavigationBarColor: new Color(0xFF000000),
+            systemNavigationBarDividerColor: null,
+            statusBarColor: null,
+            systemNavigationBarIconBrightness: Brightness.light,
+            statusBarIconBrightness: Brightness.dark,
+            statusBarBrightness: Brightness.light
+        );
+
+        public Dictionary<string, object> _toMap() {
+            return new Dictionary<string, object> {
+                {"systemNavigationBarColor", this.systemNavigationBarColor?.value},
+                {"systemNavigationBarDividerColor", this.systemNavigationBarDividerColor?.value},
+                {"statusBarColor", this.statusBarColor?.value},
+                {"statusBarBrightness", this.statusBarBrightness?.ToString()},
+                {"statusBarIconBrightness", this.statusBarIconBrightness?.ToString()},
+                {"systemNavigationBarIconBrightness", this.systemNavigationBarIconBrightness?.ToString()}
+            };
+        }
+
+        public string toString() => this._toMap().ToString();
+
+        public SystemUiOverlayStyle copyWith(
+            Color systemNavigationBarColor = null,
+            Color systemNavigationBarDividerColor = null,
+            Color statusBarColor = null,
+            Brightness? statusBarBrightness = null,
+            Brightness? statusBarIconBrightness = null,
+            Brightness? systemNavigationBarIconBrightness = null
+        ) {
+            return new SystemUiOverlayStyle(
+                systemNavigationBarColor: systemNavigationBarColor ?? this.systemNavigationBarColor,
+                systemNavigationBarDividerColor:
+                systemNavigationBarDividerColor ?? this.systemNavigationBarDividerColor,
+                statusBarColor: statusBarColor ?? this.statusBarColor,
+                statusBarIconBrightness: statusBarIconBrightness ?? this.statusBarIconBrightness,
+                statusBarBrightness: statusBarBrightness ?? this.statusBarBrightness,
+                systemNavigationBarIconBrightness: systemNavigationBarIconBrightness ??
+                                                   this.systemNavigationBarIconBrightness
+            );
+        }
+
+        public int GetHashCode() {
+            var hashCode = this.systemNavigationBarColor.GetHashCode();
+            hashCode = (hashCode * 397) ^ this.systemNavigationBarDividerColor.GetHashCode();
+            hashCode = (hashCode * 397) ^ this.statusBarColor.GetHashCode();
+            hashCode = (hashCode * 397) ^ this.statusBarBrightness.GetHashCode();
+            hashCode = (hashCode * 397) ^ this.statusBarIconBrightness.GetHashCode();
+            hashCode = (hashCode * 397) ^ this.systemNavigationBarIconBrightness.GetHashCode();
+            return hashCode;
+        }
+
+
+        public bool Equals(SystemUiOverlayStyle other) {
+            if (ReferenceEquals(null, other)) {
+                return false;
+            }
+
+            if (ReferenceEquals(this, other)) {
+                return true;
+            }
+
+            return other.systemNavigationBarColor == this.systemNavigationBarColor &&
+                   other.systemNavigationBarDividerColor == this.systemNavigationBarDividerColor &&
+                   other.statusBarColor == this.statusBarColor &&
+                   other.statusBarIconBrightness == this.statusBarIconBrightness &&
+                   other.statusBarBrightness == this.statusBarIconBrightness &&
+                   other.systemNavigationBarIconBrightness == this.systemNavigationBarIconBrightness;
+        }
+
+        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((SystemUiOverlayStyle) obj);
+        }
+
+        public static bool operator ==(SystemUiOverlayStyle left, SystemUiOverlayStyle right) {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(SystemUiOverlayStyle left, SystemUiOverlayStyle right) {
+            return !Equals(left, right);
+        }
+    }
+}

Runtime/service/system_chrome.cs.meta

+fileFormatVersion: 2
+guid: 7dec1d416078846ec89141bd833cb550
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/widgets/implicit_animations.cs

+using System;
+using Unity.UIWidgets.animation;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.ui;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+
+namespace Unity.UIWidgets.widgets {
+    public class BoxConstraintsTween : Tween<BoxConstraints> {
+        public BoxConstraintsTween(
+            BoxConstraints begin = null,
+            BoxConstraints end = null
+        ) : base(begin: begin, end: end) {
+        }
+
+        public override BoxConstraints lerp(double t) => BoxConstraints.lerp(this.begin, this.end, t);
+    }
+
+    public class BorderRadiusTween : Tween<BorderRadius> {
+        public BorderRadiusTween(
+            BorderRadius begin = null,
+            BorderRadius end = null) : base(begin: begin, end: end) {
+        }
+
+        public override BorderRadius lerp(double t) => BorderRadius.lerp(this.begin, this.end, t);
+    }
+
+    public class TextStyleTween : Tween<TextStyle> {
+        public TextStyleTween(
+            TextStyle begin = null,
+            TextStyle end = null) : base(begin: begin, end: end) {
+        }
+
+        public override TextStyle lerp(double t) => TextStyle.lerp(this.begin, this.end, t);
+    }
+
+
+    public abstract class ImplicitlyAnimatedWidget : StatefulWidget {
+        public ImplicitlyAnimatedWidget(
+            Key key = null,
+            Curve curve = null,
+            TimeSpan? duration = null
+        ) : base(key: key) {
+            D.assert(duration != null);
+            this.curve = curve ?? Curves.linear;
+            this.duration = duration ?? TimeSpan.Zero;
+        }
+
+        public readonly Curve curve;
+
+        public readonly TimeSpan duration;
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new IntProperty("duration", (int) this.duration.TotalMilliseconds, unit: "ms"));
+        }
+    }
+
+
+    public delegate Tween<T> TweenConstructor<T>(T targetValue);
+
+    public interface ITweenVisitor {
+        Tween<T> visit<T, T2>(ImplicitlyAnimatedWidgetState<T2> state, Tween<T> tween, T targetValue,
+            TweenConstructor<T> constructor) where T2 : ImplicitlyAnimatedWidget;
+    }
+
+    public class TweenVisitorUpdateTween : ITweenVisitor {
+        public Tween<T> visit<T, T2>(ImplicitlyAnimatedWidgetState<T2> state, Tween<T> tween, T targetValue,
+            TweenConstructor<T> constructor)
+            where T2 : ImplicitlyAnimatedWidget {
+            state._updateTween(tween, targetValue);
+            return tween;
+        }
+    }
+
+    public class TweenVisitorCheckStartAnimation : ITweenVisitor {
+        public bool shouldStartAnimation;
+
+        public TweenVisitorCheckStartAnimation() {
+            this.shouldStartAnimation = false;
+        }
+
+        public Tween<T> visit<T, T2>(ImplicitlyAnimatedWidgetState<T2> state, Tween<T> tween, T targetValue,
+            TweenConstructor<T> constructor)
+            where T2 : ImplicitlyAnimatedWidget {
+            if (targetValue != null) {
+                tween = tween ?? constructor(targetValue);
+                if (state._shouldAnimateTween(tween, targetValue))
+                    this.shouldStartAnimation = true;
+            }
+            else {
+                tween = null;
+            }
+
+            return tween;
+        }
+    }
+
+
+    public abstract class ImplicitlyAnimatedWidgetState<T> : SingleTickerProviderStateMixin<T>
+        where T : ImplicitlyAnimatedWidget {
+        protected AnimationController controller => this._controller;
+
+        AnimationController _controller;
+
+        public Animation<double> animation => this._animation;
+
+        Animation<double> _animation;
+
+        public override void initState() {
+            base.initState();
+            this._controller = new AnimationController(
+                duration: this.widget.duration,
+                debugLabel: "{" + this.widget.toStringShort() + "}",
+                vsync: this
+            );
+            this._updateCurve();
+            this._constructTweens();
+            this.didUpdateTweens();
+        }
+
+        public override void didUpdateWidget(StatefulWidget oldWidget) {
+            base.didUpdateWidget(oldWidget);
+
+            if (this.widget.curve != ((ImplicitlyAnimatedWidget) oldWidget).curve)
+                this._updateCurve();
+
+            this._controller.duration = this.widget.duration;
+            if (this._constructTweens()) {
+                var visitor = new TweenVisitorUpdateTween();
+                this.forEachTween(visitor);
+                this._controller.setValue(0.0);
+                this._controller.forward();
+                this.didUpdateTweens();
+            }
+        }
+
+        void _updateCurve() {
+            if (this.widget.curve != null)
+                this._animation = new CurvedAnimation(parent: this._controller, curve: this.widget.curve);
+            else
+                this._animation = this._controller;
+        }
+
+        public override void dispose() {
+            this._controller.dispose();
+            base.dispose();
+        }
+
+        public bool _shouldAnimateTween<T2>(Tween<T2> tween, T2 targetValue) {
+            return !targetValue.Equals(tween.end == null ? tween.begin : tween.end);
+        }
+
+        public void _updateTween<T2>(Tween<T2> tween, T2 targetValue) {
+            if (tween == null)
+                return;
+
+            tween.begin = tween.evaluate(this._animation);
+            tween.end = targetValue;
+        }
+
+        bool _constructTweens() {
+            var visitor = new TweenVisitorCheckStartAnimation();
+            this.forEachTween(visitor);
+            return visitor.shouldStartAnimation;
+        }
+
+        protected abstract void forEachTween(ITweenVisitor visitor);
+
+        protected virtual void didUpdateTweens() {
+        }
+    }
+
+
+    public abstract class AnimatedWidgetBaseState<T> : ImplicitlyAnimatedWidgetState<T>
+        where T : ImplicitlyAnimatedWidget {
+        public override void initState() {
+            base.initState();
+            this.controller.addListener(this._handleAnimationChanged);
+        }
+
+        void _handleAnimationChanged() {
+            this.setState(() => { });
+        }
+    }
+
+    public class AnimatedDefaultTextStyle : ImplicitlyAnimatedWidget {
+        public AnimatedDefaultTextStyle(
+            Key key = null,
+            Widget child = null,
+            TextStyle style = null,
+            TextAlign? textAlign = null,
+            bool softWrap = true,
+            TextOverflow? overflow = null,
+            int? maxLines = null,
+            Curve curve = null,
+            TimeSpan? duration = null
+        ) : base(key: key, curve: curve ?? Curves.linear, duration: duration) {
+            D.assert(duration != null);
+            D.assert(style != null);
+            D.assert(child != null);
+            D.assert(maxLines == null || maxLines > 0);
+            this.child = child;
+            this.style = style;
+            this.textAlign = textAlign;
+            this.softWrap = softWrap;
+            this.overflow = overflow ?? TextOverflow.clip;
+            this.maxLines = maxLines;
+        }
+
+        public readonly Widget child;
+
+        public readonly TextStyle style;
+
+        public readonly bool softWrap;
+
+        public readonly TextAlign? textAlign;
+
+        public readonly TextOverflow overflow;
+
+        public readonly int? maxLines;
+
+        public override State createState() => new _AnimatedDefaultTextStyleState();
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            this.style?.debugFillProperties(properties);
+            properties.add(new EnumProperty<TextAlign>("textAlign", this.textAlign ?? TextAlign.center,
+                defaultValue: null));
+            properties.add(new FlagProperty("softWrap", value: this.softWrap, ifTrue: "wrapping at box width",
+                ifFalse: "no wrapping except at line break characters", showName: true));
+            properties.add(new EnumProperty<TextOverflow>("overflow", this.overflow, defaultValue: null));
+            properties.add(new IntProperty("maxLines", this.maxLines, defaultValue: null));
+        }
+    }
+
+
+    public class _AnimatedDefaultTextStyleState : AnimatedWidgetBaseState<AnimatedDefaultTextStyle> {
+        TextStyleTween _style;
+
+        protected override void forEachTween(ITweenVisitor visitor) {
+            this._style = (TextStyleTween) visitor.visit(this, this._style, this.widget.style,
+                (TextStyle value) => new TextStyleTween(begin: value));
+        }
+
+        public override Widget build(BuildContext context) {
+            return new DefaultTextStyle(
+                style: this._style.evaluate(this.animation),
+                textAlign: this.widget.textAlign,
+                softWrap: this.widget.softWrap,
+                overflow: this.widget.overflow,
+                maxLines: this.widget.maxLines,
+                child: this.widget.child);
+        }
+    }
+
+
+    public class AnimatedPhysicalModel : ImplicitlyAnimatedWidget {
+        public AnimatedPhysicalModel(
+            Key key = null,
+            Widget child = null,
+            BoxShape? shape = null,
+            Clip clipBehavior = Clip.none,
+            BorderRadius borderRadius = null,
+            double? elevation = null,
+            Color color = null,
+            bool animateColor = true,
+            Color shadowColor = null,
+            bool animateShadowColor = true,
+            Curve curve = null,
+            TimeSpan? duration = null
+        ) : base(key: key, curve: curve ?? Curves.linear, duration: duration) {
+            D.assert(child != null);
+            D.assert(shape != null);
+            D.assert(elevation != null);
+            D.assert(color != null);
+            D.assert(shadowColor != null);
+            D.assert(duration != null);
+            this.child = child;
+            this.shape = shape ?? BoxShape.circle;
+            this.clipBehavior = clipBehavior;
+            this.borderRadius = borderRadius ?? BorderRadius.zero;
+            this.elevation = elevation ?? 0.0;
+            this.color = color;
+            this.animateColor = animateColor;
+            this.shadowColor = shadowColor;
+            this.animateShadowColor = animateShadowColor;
+        }
+
+        public readonly Widget child;
+
+        public readonly BoxShape shape;
+
+        public readonly Clip clipBehavior;
+
+        public readonly BorderRadius borderRadius;
+
+        public readonly double elevation;
+
+        public readonly Color color;
+
+        public readonly bool animateColor;
+
+        public readonly Color shadowColor;
+
+        public readonly bool animateShadowColor;
+
+        public override State createState() => new _AnimatedPhysicalModelState();
+
+        public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+            base.debugFillProperties(properties);
+            properties.add(new EnumProperty<BoxShape>("shape", this.shape));
+            properties.add(new DiagnosticsProperty<BorderRadius>("borderRadius", this.borderRadius));
+            properties.add(new DoubleProperty("elevation", this.elevation));
+            properties.add(new DiagnosticsProperty<Color>("color", this.color));
+            properties.add(new DiagnosticsProperty<bool>("animateColor", this.animateColor));
+            properties.add(new DiagnosticsProperty<Color>("shadowColor", this.shadowColor));
+            properties.add(new DiagnosticsProperty<bool>("animateShadowColor", this.animateShadowColor));
+        }
+    }
+
+    public class _AnimatedPhysicalModelState : AnimatedWidgetBaseState<AnimatedPhysicalModel> {
+        BorderRadiusTween _borderRadius;
+        DoubleTween _elevation;
+        ColorTween _color;
+        ColorTween _shadowColor;
+
+        protected override void forEachTween(ITweenVisitor visitor) {
+            this._borderRadius = (BorderRadiusTween) visitor.visit(this, this._borderRadius, this.widget.borderRadius,
+                (BorderRadius value) => new BorderRadiusTween(begin: value));
+            this._elevation = (DoubleTween) visitor.visit(this, this._elevation, this.widget.elevation,
+                (double value) => new DoubleTween(begin: value, end: value));
+            this._color = (ColorTween) visitor.visit(this, this._color, this.widget.color,
+                (Color value) => new ColorTween(begin: value));
+            this._shadowColor = (ColorTween) visitor.visit(this, this._shadowColor, this.widget.shadowColor,
+                (Color value) => new ColorTween(begin: value));
+        }
+
+        public override Widget build(BuildContext context) {
+            return new PhysicalModel(
+                child: this.widget.child,
+                shape: this.widget.shape,
+                clipBehavior: this.widget.clipBehavior,
+                borderRadius: this._borderRadius.evaluate(this.animation),
+                elevation: this._elevation.evaluate(this.animation),
+                color: this.widget.animateColor ? this._color.evaluate(this.animation) : this.widget.color,
+                shadowColor: this.widget.animateShadowColor
+                    ? this._shadowColor.evaluate(this.animation)
+                    : this.widget.shadowColor);
+        }
+    }
+}

Runtime/widgets/implicit_animations.cs.meta

+fileFormatVersion: 2
+guid: ecf39d43bfae547a7ba543edafc67b19
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/widgets/layout_builder.cs

+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.gestures;
+using Unity.UIWidgets.rendering;
+using Unity.UIWidgets.ui;
+
+namespace Unity.UIWidgets.widgets {
+    public delegate Widget LayoutWidgetBuilder(BuildContext context, BoxConstraints constraints);
+
+
+    class LayoutBuilder : RenderObjectWidget {
+        public LayoutBuilder(
+            Key key = null,
+            LayoutWidgetBuilder builder = null) : base(key: key) {
+            D.assert(builder != null);
+            this.builder = builder;
+        }
+
+        public readonly LayoutWidgetBuilder builder;
+
+        public override Element createElement() => new _LayoutBuilderElement(this);
+
+        public override RenderObject createRenderObject(BuildContext context) => new _RenderLayoutBuilder();
+    }
+
+    class _LayoutBuilderElement : RenderObjectElement {
+        public _LayoutBuilderElement(
+            LayoutBuilder widget) : base(widget) {
+        }
+
+        new LayoutBuilder widget => (LayoutBuilder) base.widget;
+
+        new _RenderLayoutBuilder renderObject => (_RenderLayoutBuilder) base.renderObject;
+
+        Element _child;
+
+        public override void visitChildren(ElementVisitor visitor) {
+            if (this._child != null)
+                visitor(this._child);
+        }
+
+        protected override void forgetChild(Element child) {
+            D.assert(child == this._child);
+            this._child = null;
+        }
+
+        public override void mount(Element parent, object newSlot) {
+            base.mount(parent, newSlot);
+            this.renderObject.callback = this._layout;
+        }
+
+        public override void update(Widget newWidget) {
+            D.assert(this.widget != newWidget);
+            base.update(newWidget);
+            D.assert(this.widget == newWidget);
+            this.renderObject.callback = this._layout;
+            this.renderObject.markNeedsLayout();
+        }
+
+        protected override void performRebuild() {
+            this.renderObject.markNeedsLayout();
+            base.performRebuild();
+        }
+
+        public override void unmount() {
+            this.renderObject.callback = null;
+            base.unmount();
+        }
+
+        void _layout(BoxConstraints constraints) {
+            this.owner.buildScope(this, () => {
+                Widget built = null;
+                if (this.widget.builder != null) {
+                    built = this.widget.builder(this, constraints);
+                    WidgetsD.debugWidgetBuilderValue(this.widget, built);
+                }
+
+                this._child = this.updateChild(this._child, built, null);
+                D.assert(this._child != null);
+            });
+        }
+
+        protected override void insertChildRenderObject(RenderObject child, object slot) {
+            _RenderLayoutBuilder renderObject = this.renderObject;
+            D.assert(slot == null);
+            D.assert(renderObject.debugValidateChild(child));
+            renderObject.child = (RenderBox) child;
+            D.assert(renderObject == this.renderObject);
+        }
+
+        protected override void moveChildRenderObject(RenderObject child, object slot) {
+            D.assert(false);
+        }
+
+        protected override void removeChildRenderObject(RenderObject child) {
+            _RenderLayoutBuilder renderObject = this.renderObject;
+            D.assert(renderObject.child == child);
+            renderObject.child = null;
+            D.assert(renderObject == this.renderObject);
+        }
+    }
+
+
+    public class _RenderLayoutBuilder : RenderObjectWithChildMixinRenderBox<RenderBox> {
+        public _RenderLayoutBuilder(
+            LayoutCallback<BoxConstraints> callback = null) {
+            this._callback = callback;
+        }
+
+        public LayoutCallback<BoxConstraints> callback {
+            get { return this._callback; }
+            set {
+                if (value == this._callback)
+                    return;
+                this._callback = value;
+                this.markNeedsLayout();
+            }
+        }
+
+        LayoutCallback<BoxConstraints> _callback;
+
+        bool _debugThrowIfNotCheckingIntrinsics() {
+            D.assert(() => {
+                if (!debugCheckingIntrinsics) {
+                    throw new UIWidgetsError(
+                        "LayoutBuilder does not support returning intrinsic dimensions.\n" +
+                        "Calculating the intrinsic dimensions would require running the layout " +
+                        "callback speculatively, which might mutate the live render object tree."
+                    );
+                }
+
+                return true;
+            });
+            return true;
+        }
+
+        protected override double computeMinIntrinsicWidth(double height) {
+            D.assert(this._debugThrowIfNotCheckingIntrinsics());
+            return 0.0;
+        }
+
+        protected override double computeMaxIntrinsicWidth(double height) {
+            D.assert(this._debugThrowIfNotCheckingIntrinsics());
+            return 0.0;
+        }
+
+        protected override double computeMinIntrinsicHeight(double width) {
+            D.assert(this._debugThrowIfNotCheckingIntrinsics());
+            return 0.0;
+        }
+
+        protected override double computeMaxIntrinsicHeight(double width) {
+            D.assert(this._debugThrowIfNotCheckingIntrinsics());
+            return 0.0;
+        }
+
+        protected override void performLayout() {
+            D.assert(this.callback != null);
+            this.invokeLayoutCallback(this.callback);
+            if (this.child != null) {
+                this.child.layout(this.constraints, parentUsesSize: true);
+                this.size = this.constraints.constrain(this.child.size);
+            }
+            else {
+                this.size = this.constraints.biggest;
+            }
+        }
+
+        protected override bool hitTestChildren(HitTestResult result, Offset position = null) {
+            return this.child?.hitTest(result, position: position) ?? false;
+        }
+
+        public override void paint(PaintingContext context, Offset offset) {
+            if (this.child != null)
+                context.paintChild(this.child, offset);
+        }
+    }
+}

Runtime/widgets/layout_builder.cs.meta

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Samples/UIWidgetSample/MaterialCanvas.cs

+using Unity.UIWidgets.engine;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.material;
+using Unity.UIWidgets.widgets;
+using UnityEngine;
+using Color = Unity.UIWidgets.ui.Color;
+using Material = Unity.UIWidgets.material.Material;
+
+namespace UIWidgetsSample {
+    public class MaterialCanvas : WidgetCanvas {
+        protected override Widget getWidget() {
+            return new MaterialApp();
+        }
+
+        class MaterialApp : StatefulWidget {
+            public MaterialApp(Key key = null) : base(key) {
+            }
+
+            public override State createState() {
+                return new MaterialWidgetState();
+            }
+        }
+
+        class MaterialWidget : StatefulWidget {
+            public MaterialWidget(Key key = null) : base(key) {
+            }
+
+            public override State createState() {
+                return new MaterialWidgetState();
+            }
+        }
+
+        // test-case: material button 
+        class MaterialWidgetState : State<MaterialWidget> {
+            public override Widget build(BuildContext context) {
+                return new Material(
+                    child: new Center(
+                        child: new MaterialButton(
+                            color: Colors.blue,
+                            splashColor: new Color(0xFFFF0011),
+                            highlightColor: new Color(0x88FF0011),
+                            onPressed: () => { Debug.Log("pressed here");}
+                        )
+                    )
+                );
+            }
+        }
+
+//        // test-case: ink well         
+//        class MaterialWidgetState : State<MaterialWidget> {
+//            public override Widget build(BuildContext context) {
+//                return new Material(
+//                    child: new Center(
+//                        child: new Container(
+//                            width: 30,
+//                            height: 30,
+//                               child : new InkWell(
+//                                borderRadius: BorderRadius.circular(2.0),
+//                                highlightColor: new Color(0xAAFF0000),
+//                                splashColor: new Color(0xAA0000FF),
+//                                //radius : 20,
+//                                onTap: () => { }
+//                            ))
+//                        )
+//                );
+//            }
+//        }
+    }
+}

Samples/UIWidgetSample/MaterialCanvas.cs.meta

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