Add BoxRenderer and fix color messaging

Ooui.Forms/Exports.cs

@@ -5,6 +5,7 @@ using Xamarin.Forms;
 using Xamarin.Forms.Internals;
 
 [assembly: Dependency (typeof (ResourcesProvider))]
+[assembly: ExportRenderer (typeof (BoxView), typeof (BoxRenderer))]
 [assembly: ExportRenderer (typeof (Button), typeof (ButtonRenderer))]
 [assembly: ExportRenderer (typeof (Label), typeof (LabelRenderer))]
 

Ooui.Forms/Forms.cs

@@ -26,6 +26,7 @@ namespace Xamarin.Forms
             Device.SetIdiom (TargetIdiom.Desktop);
             Device.PlatformServices = new OouiPlatformServices ();
             Device.Info = new OouiDeviceInfo ();
+            Color.SetAccent (Color.FromHex ("#0000EE")); // Safari Blue
 
             Registrar.RegisterAll (new[] {
                 typeof(ExportRendererAttribute),

Ooui.Forms/Renderers/BoxRenderer.cs

@@ -0,0 +1,41 @@
+using System;
+using System.ComponentModel;
+using Ooui.Forms.Extensions;
+using Xamarin.Forms;
+
+namespace Ooui.Forms.Renderers
+{
+    public class BoxRenderer : VisualElementRenderer<BoxView>
+    {
+        Ooui.Color _colorToRenderer;
+
+        protected override void OnElementChanged (ElementChangedEventArgs<BoxView> e)
+        {
+            base.OnElementChanged (e);
+
+            if (Element != null)
+                SetBackgroundColor (Element.BackgroundColor);
+        }
+
+        protected override void OnElementPropertyChanged (object sender, PropertyChangedEventArgs e)
+        {
+            base.OnElementPropertyChanged (sender, e);
+            if (e.PropertyName == BoxView.ColorProperty.PropertyName)
+                SetBackgroundColor (Element.BackgroundColor);
+        }
+
+        protected override void SetBackgroundColor (Xamarin.Forms.Color color)
+        {
+            if (Element == null)
+                return;
+
+            var elementColor = Element.Color;
+            if (!elementColor.IsDefault)
+                _colorToRenderer = elementColor.ToOouiColor ();
+            else
+                _colorToRenderer = Colors.Clear;
+
+            Style.BackgroundColor = _colorToRenderer;
+        }
+    }
+}

Ooui/Client.js

@@ -1,5 +1,5 @@
 
-var debug = false;
+var debug = true;
 
 const nodes = {};
 

Ooui/Color.cs

@@ -1,10 +1,11 @@
 using System;
-
+using Newtonsoft.Json;
 using StyleValue = System.Object;
 
 namespace Ooui
 {
-    public struct Color
+    [Newtonsoft.Json.JsonConverter (typeof (ColorJsonConverter))]
+    public struct Color : IEquatable<Color>
     {
         public byte R, G, B, A;
 
@@ -33,9 +34,70 @@ namespace Ooui
             set => A = value >= 1.0 ? (byte)255 : ((value <= 0.0) ? (byte)0 : (byte)(value * 255.0 + 0.5));
         }
 
+        public override bool Equals (object obj)
+        {
+            if (obj is Color other)
+                return R == other.R && G == other.G && B == other.B && A == other.A;
+            return false;
+        }
+
+        public bool Equals (Color other) => R == other.R && G == other.G && B == other.B && A == other.A;
+
+        public override int GetHashCode () => R.GetHashCode () + G.GetHashCode () * 2 + B.GetHashCode () * 3 + A.GetHashCode () * 5;
+
         public static Color FromStyleValue (StyleValue styleColor)
         {
+            if (styleColor is Color c)
+                return c;
+            if (styleColor is string s)
+                return Parse (s);
             return Colors.Clear;
         }
+
+        public static Color Parse (string styleValue)
+        {
+            if (string.IsNullOrWhiteSpace (styleValue) || styleValue.Length < 4)
+                throw new ArgumentException ("Cannot parse empty strings", nameof (styleValue));
+            
+            if (styleValue.Length > 32)
+                throw new ArgumentException ("Color string is too long", nameof (styleValue));
+
+            if (styleValue == "inherit")
+                return Colors.Clear;
+            
+            //if (styleValue[0] == '#' && styleValue.Length == 4) {
+            //}
+
+            //if (styleValue[0] == '#' && styleValue.Length == 7) {
+            //}
+
+            throw new ArgumentException ($"Cannot parse color string `{styleValue}`", nameof (styleValue));
+        }
+
+        public override string ToString ()
+        {
+            if (A == 255)
+                return string.Format ("#{0:x2}{1:x2}{2:x2}", R, G, B);
+            return string.Format ("rgba({0},{1},{2},{3})", R, G, B, A / 255.0);
+        }
+    }
+
+    class ColorJsonConverter : Newtonsoft.Json.JsonConverter
+    {
+        public override bool CanConvert (Type objectType)
+        {
+            return objectType == typeof (Color);
+        }
+
+        public override object ReadJson (JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            var str = reader.ReadAsString ();
+            return Color.Parse (str);
+        }
+
+        public override void WriteJson (JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            writer.WriteValue (value.ToString ());
+        }
     }
 }