Add properties to Context2D

Ooui/Canvas.cs

@@ -24,7 +24,7 @@ namespace Ooui
         {
         }
 
-        public Context2d GetContext2d ()
+        public CanvasRenderingContext2D GetContext2D ()
         {
             if (System.Threading.Interlocked.CompareExchange (ref gotContext2d, 1, 0) == 0) {
                 var mcall = Message.Call (Id, "getContext", "2d");

Ooui/CanvasRenderingContext2D.cs

@@ -2,9 +2,89 @@ namespace Ooui
 {
     public class CanvasRenderingContext2D : EventTarget
     {
+        object fillStyle = "#000";
+        public object FillStyle {
+            get => fillStyle;
+            set => SetProperty (ref fillStyle, value, "fillStyle");
+        }
+
+        double fontSize = 10;
+        public double FontSize {
+            get => fontSize;
+            set {
+                if (fontSize != value) {
+                    fontSize = value;
+                    SetProperty (ref font, GetFont (), "font", "Font");
+                    OnPropertyChanged ("FontSize");
+                }
+            }
+        }
+        string fontFamily = "sans-serif";
+        public string FontFamily {
+            get => fontFamily;
+            set {
+                if (fontFamily != value) {
+                    fontFamily = value ?? "sans-serif";
+                    SetProperty (ref font, GetFont (), "font", "Font");
+                    OnPropertyChanged ("FontFamily");
+                }
+            }
+        }
+        string font = "10px sans-serif";
+        public string Font => font;
+        string GetFont ()
+        {
+            var size = FontSize.ToString (System.Globalization.CultureInfo.InvariantCulture);
+            return $"{size}px {FontFamily}";
+        }
+
+        double globalAlpha = 1;
+        public double GlobalAlpha {
+            get => globalAlpha;
+            set => SetProperty (ref globalAlpha, value, "globalAlpha");
+        }
+
+        LineCap lineCap = LineCap.Butt;
+        public LineCap LineCap {
+            get => lineCap;
+            set => SetProperty (ref lineCap, value, "lineCap");
+        }
+
+        LineJoin lineJoin = LineJoin.Miter;
+        public LineJoin LineJoin {
+            get => lineJoin;
+            set => SetProperty (ref lineJoin, value, "lineJoin");
+        }
+
+        double lineWidth = 1;
+        public double LineWidth {
+            get => lineWidth;
+            set => SetProperty (ref lineWidth, value, "lineWidth");
+        }
+
+        object strokeStyle = "#000";
+        public object StrokeStyle {
+            get => strokeStyle;
+            set => SetProperty (ref strokeStyle, value, "strokeStyle");
+        }
+
         public CanvasRenderingContext2D ()
             : base ("#canvasRenderingContext2D")
         {
         }
     }
+
+    public enum LineCap
+    {
+        Butt,
+        Round,
+        Square
+    }
+
+    public enum LineJoin
+    {
+        Bevel,
+        Round,
+        Miter
+    }
 }

Ooui/EventTarget.cs

@@ -89,9 +89,14 @@ namespace Ooui
                 return false;
             backingStore = newValue;
             SendSet (attributeName, newValue);
+            OnPropertyChanged (propertyName);
             return true;
         }
 
+        protected virtual void OnPropertyChanged (string propertyName)
+        {
+        }
+
         public const char IdPrefix = '\u2999';
 
         static long idCounter = 0;

Tests/CanvasTests.cs

@@ -9,13 +9,13 @@ namespace Tests
     public class CanvasTests
     {
         [TestMethod]
-        public void Context2dState ()
+        public void Context2DState ()
         {
             var c = new Canvas ();
             Assert.AreEqual (1, c.StateMessages.Count);
-            var c2d = c.GetContext2d ();
+            var c2d = c.GetContext2D ();
             Assert.AreEqual (2, c.StateMessages.Count);
-            var c2d2 = c.GetContext2d ();
+            var c2d2 = c.GetContext2D ();
             Assert.AreEqual (2, c.StateMessages.Count);
             Assert.AreEqual (c2d, c2d2);
         }