internal JsValue GetOwnPropertyDescriptor(JsValue thisObject, JsValue[] arguments)
{
var o = TypeConverter.ToObject(_engine, arguments.At(0));
var p = arguments.At(1);
var name = TypeConverter.ToPropertyKey(p);
var desc = o.GetOwnProperty(name);
return(PropertyDescriptor.FromPropertyDescriptor(Engine, desc));
}
/// <summary>
/// https://tc39.es/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-defineownproperty-p-desc
/// </summary>
public override bool DefineOwnProperty(JsValue property, PropertyDescriptor desc)
{
var arguments = new[] { _target, TypeConverter.ToPropertyKey(property), PropertyDescriptor.FromPropertyDescriptor(_engine, desc, strictUndefined: true) };
if (!TryCallHandler(TrapDefineProperty, arguments, out var result))
{
return(_target.DefineOwnProperty(property, desc));
}
var success = TypeConverter.ToBoolean(result);
if (!success)
{
return(false);
}
var targetDesc = _target.GetOwnProperty(property);
var extensibleTarget = _target.Extensible;
var settingConfigFalse = desc.ConfigurableSet && !desc.Configurable;
if (targetDesc == PropertyDescriptor.Undefined)
{
if (!extensibleTarget || settingConfigFalse)
{
ExceptionHelper.ThrowTypeError(_engine.Realm);
}
}
else
{
if (!IsCompatiblePropertyDescriptor(extensibleTarget, desc, targetDesc))
{
ExceptionHelper.ThrowTypeError(_engine.Realm);
}
if (targetDesc.Configurable && settingConfigFalse)
{
ExceptionHelper.ThrowTypeError(_engine.Realm);
}
if (targetDesc.IsDataDescriptor() && !targetDesc.Configurable && targetDesc.Writable)
{
if (desc.WritableSet && !desc.Writable)
{
ExceptionHelper.ThrowTypeError(_engine.Realm);
}
}
}
return(true);
}
private JsValue GetOwnPropertyDescriptors(JsValue thisObject, JsValue[] arguments)
{
var o = TypeConverter.ToObject(_engine, arguments.At(0));
var ownKeys = o.GetOwnPropertyKeys();
var descriptors = _engine.Object.Construct(0);
foreach (var key in ownKeys)
{
var desc = o.GetOwnProperty(key);
var descriptor = PropertyDescriptor.FromPropertyDescriptor(Engine, desc);
if (descriptor != Undefined)
{
descriptors.CreateDataProperty(key, descriptor);
}
}
return(descriptors);
}
/// <summary>
/// https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
/// </summary>
private JsValue GetOwnPropertyDescriptors(JsValue thisObject, JsValue[] arguments)
{
var o = TypeConverter.ToObject(_realm, arguments.At(0));
var ownKeys = o.GetOwnPropertyKeys();
var descriptors = _realm.Intrinsics.Object.Construct(0);
foreach (var key in ownKeys)
{
var desc = o.GetOwnProperty(key);
var descriptor = PropertyDescriptor.FromPropertyDescriptor(Engine, desc);
if (!ReferenceEquals(descriptor, Undefined))
{
descriptors.CreateDataProperty(key, descriptor);
}
}
return(descriptors);
}
public JsValue GetOwnPropertyDescriptor(JsValue thisObject, JsValue[] arguments)
{
var oArg = arguments.At(0);
var o = oArg.TryCast <ObjectInstance>();
if (o == null)
{
throw new JavaScriptException(Engine.TypeError);
}
var p = arguments.At(1);
var name = TypeConverter.ToString(p);
var desc = o.GetOwnProperty(name);
return(PropertyDescriptor.FromPropertyDescriptor(Engine, desc));
}
public JsValue GetOwnPropertyDescriptor(JsValue thisObject, JsValue[] arguments)
{
var oArg = arguments.At(0);
var o = oArg.TryCast <ObjectInstance>();
if (ReferenceEquals(o, null))
{
ExceptionHelper.ThrowTypeError(Engine);
}
var p = arguments.At(1);
var name = TypeConverter.ToString(p);
var desc = o.GetOwnProperty(name);
return(PropertyDescriptor.FromPropertyDescriptor(Engine, desc));
}