Add convenient cast method for MeasureOutput.Make

Summary: Same as Java, it allows to use float and double values in Make arguments.

Reviewed By: emilsjolander

Differential Revision: D4163347

fbshipit-source-id: f373247b3f37e7940a66044000cca2935068decf

csharp/Facebook.CSSLayout/MeasureFunction.cs

@@ -9,10 +9,10 @@
 
 namespace Facebook.CSSLayout
 {
-  public delegate long MeasureFunction(
+    public delegate long MeasureFunction(
-      CSSNode node,
+        CSSNode node,
-      float width,
+        float width,
-      CSSMeasureMode widthMode,
+        CSSMeasureMode widthMode,
-      float height,
+        float height,
-      CSSMeasureMode heightMode);
+        CSSMeasureMode heightMode);
 }

csharp/Facebook.CSSLayout/MeasureOutput.cs

@@ -11,19 +11,24 @@ namespace Facebook.CSSLayout
 {
     public class MeasureOutput
     {
+        public static long Make(double width, double height)
+        {
+            return Make((int) width, (int) height);
+        }
+
         public static long Make(int width, int height)
         {
-          return (long)(((ulong) width) << 32 | ((ulong) height));
+            return (long)(((ulong) width) << 32 | ((ulong) height));
         }
 
         public static int GetWidth(long measureOutput)
         {
-          return (int) (0xFFFFFFFF & (measureOutput >> 32));
+            return (int) (0xFFFFFFFF & (measureOutput >> 32));
         }
 
         public static int GetHeight(long measureOutput)
         {
-          return (int) (0xFFFFFFFF & measureOutput);
+            return (int) (0xFFFFFFFF & measureOutput);
         }
     }
 }

csharp/tests/Facebook.CSSLayout/CSSNodeTest.cs

@@ -157,8 +157,20 @@ namespace Facebook.CSSLayout
                 return MeasureOutput.Make(100, 150);
             });
             node.CalculateLayout();
-            Assert.AreEqual(100, (int)node.LayoutWidth);
+            Assert.AreEqual(100, node.LayoutWidth);
-            Assert.AreEqual(150, (int)node.LayoutHeight);
+            Assert.AreEqual(150, node.LayoutHeight);
+        }
+
+        [Test]
+        public void TestMeasureFuncWithFloat()
+        {
+            CSSNode node = new CSSNode();
+            node.SetMeasureFunction((_, width, widthMode, height, heightMode) => {
+                return MeasureOutput.Make(123.4f, 81.7f);
+            });
+            node.CalculateLayout();
+            Assert.AreEqual(123, node.LayoutWidth);
+            Assert.AreEqual(81, node.LayoutHeight);
         }
 
         [Test]