public object ConvertToJs(object obj)
{
if (obj == null)
{
return(Null.Value);
}
if (obj == _globalFn())
{
return(_engine.Global);
}
if (obj is int || obj is double || obj is ushort || obj is short || obj is float || obj is decimal || obj is long || obj is ulong)
{
return(Convert.ToDouble(obj));
}
if (obj is string || obj is bool)
{
return(obj);
}
if (obj is IRawJson json)
{
try
{
var x = (JSONObject)Engine.Global["JSON"];
var parseMethod = (FunctionInstance)x["parse"];
return(parseMethod.Call(x, json.JsonString));
}
catch
{
return(Null.Value);
}
}
if (_clrToJsObjects.TryGetValue(obj, out var jsObj))
{
return(jsObj);
}
//todo: check if the func and action are necessary
if (obj is Func <object, object> func)
{
jsObj = new FuncInst(this, func);
}
else if (obj is Action <object, object[]> actObjs)
{
jsObj = new ActInst(this, actObjs);
}
else
{
jsObj = new ClrObjectInstance(this, obj, GetPrototype(obj.GetType()));
}
RegisterMap(obj, jsObj);
return(jsObj);
}
/// <summary>
/// Adds properties to the specified js object from the specified clr object.
/// </summary>
public static void DefineProperties(this ObjectInstance jsObject, ClrTypeConverter ctx, Type type, object clrOwner = null)
{
var bindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly;
//register properties
foreach (var property in type.GetProperties(bindingFlags).Where(p => p.GetCustomAttribute <JsHiddenAttribute>() == null))
{
var name = property.GetName();
//todo: compile delegate instead of reflection, research what is faster.
var jsGetter =
property.GetMethod != null && property.GetMethod.IsPublic ? new FuncInst(ctx, clrThis => property.GetValue(clrThis)) : null;
var jsSetter =
property.SetMethod != null && property.SetMethod.IsPublic ? new ActInst(ctx, (clrThis, objects) =>
property.SetValue(clrThis, ctx.ConvertToClr(objects[0], property.PropertyType, ctx.ConvertToJs(clrThis)))) : null;
var jsProperty = new PropertyDescriptor(jsGetter, jsSetter, PropertyAttributes.Configurable);
jsObject.DefineProperty(name, jsProperty, false);
}
//register methods
foreach (var methods in type
.GetMethods(bindingFlags)
.Where(p => p.GetCustomAttribute <JsHiddenAttribute>() == null &&
p.GetCustomAttribute <JsCtorAttribute>() == null)
.GroupBy(p => p.GetName()))
{
var methodsArray = methods.ToArray();
var firstMethod = methodsArray[0];
if (firstMethod.IsSpecialName)
{
continue;
}
if (firstMethod.DeclaringType == typeof(object))
{
continue;
}
var name = methods.Key;
var jsMethod =
methodsArray.Length == 1
? new ClrMethodInstance(ctx, clrOwner, firstMethod, name)
: (FunctionInstance) new ClrOverloadMethodInstance(ctx, clrOwner, methodsArray, name);
//todo: check the PropertyAttributes
var jsProperty = new PropertyDescriptor(jsMethod, PropertyAttributes.Sealed);
jsObject.DefineProperty(name, jsProperty, false);
}
//register events
foreach (var evt in type.GetEvents(bindingFlags)
.Where(p => p.GetCustomAttribute <JsHiddenAttribute>() == null))
{
var name = evt.GetName().ToLowerInvariant();
var jsGetter = new FuncInst(ctx, clrThis =>
{
var attachedEvents = ctx.GetAttachedEventsFor(clrThis);
return(attachedEvents[evt]);
}, false);
var jsSetter = new ActInst(ctx,
(clrThis, args) =>
{
var jsThis = ctx.ConvertToJs(clrThis);
var attachedEvents = ctx.GetAttachedEventsFor(clrThis);
if (attachedEvents.TryGetValue(evt, out var existHandler))
{
var clrHandler = ctx.ConvertToClr(existHandler, evt.EventHandlerType, jsThis);
evt.RemoveMethod.Invoke(clrThis, new [] { clrHandler });
attachedEvents.Remove(evt);
}
if (args.Length != 0 && args[0] is FunctionInstance functionInstance)
{
var clrHandler = ctx.ConvertToClr(args[0], evt.EventHandlerType, jsThis);
evt.AddMethod.Invoke(clrThis, new[] { clrHandler });
attachedEvents[evt] = functionInstance;
}
});
var jsProperty = new PropertyDescriptor(jsGetter, jsSetter, PropertyAttributes.Configurable);
jsObject.DefineProperty(name, jsProperty, false);
}
//Register static fields
DefineStaticProperties(jsObject, ctx, type);
}