Use DomName in enum JsValues

Author: Sebbs128

src/AngleSharp.Js/Extensions/EngineExtensions.cs

@@ -45,6 +45,12 @@ public static JsValue ToJsValue(this Object obj, EngineInstance engine)
                 }
                 else if (obj is Enum)
                 {
+                    string name = ((Enum)obj).GetOfficialName();
+                    if (name != null)
+                    {
+                        return new JsValue(name);
+                    }
+
                     return new JsValue(Convert.ToInt32(obj));
                 }
 

src/AngleSharp.Js/Extensions/ReflectionExtensions.cs

@@ -55,8 +55,8 @@ public static MethodInfo PrepareConvert(this Type fromType, Type toType)
         public static String GetOfficialName(this MemberInfo member)
         {
             var names = member.GetCustomAttributes<DomNameAttribute>();
-            var officalNameAttribute = names.FirstOrDefault();
-            return officalNameAttribute?.OfficialName ?? member.Name;
+            var officialNameAttribute = names.FirstOrDefault();
+            return officialNameAttribute?.OfficialName ?? member.Name;
         }
 
         public static String GetOfficialName(this Type currentType, Type baseType)
@@ -87,6 +87,18 @@ public static String GetOfficialName(this Type currentType, Type baseType)
             return name;
         }
 
+        public static String GetOfficialName(this Enum value)
+        {
+            var enumType = value.GetType();
+            var member = enumType.GetMember(value.ToString()).FirstOrDefault();
+
+            // if the enum value does not have a DomNameAttribute, calling member.GetOfficialName() would return the value name
+            // to allow previous behaviour to be preserved, if the DomNameAttribute is not present then null will be returned
+            IEnumerable<DomNameAttribute> names = member.GetCustomAttributes<DomNameAttribute>();
+            var officialNameAttribute = names.FirstOrDefault();
+            return officialNameAttribute?.OfficialName;
+        }
+
         public static PropertyInfo GetInheritedProperty(this Type type, String propertyName, BindingFlags bindingAttr = BindingFlags.Public | BindingFlags.Instance)
         {
             if (type.GetTypeInfo().IsInterface)