/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-9.3
/// </summary>
public static double ToNumber(JsValue o)
{
if (o._type == Types.Object && o is IPrimitiveInstance)
{
var p = o as IPrimitiveInstance;
return(ToNumber(ToPrimitive(p.PrimitiveValue, Types.Number)));
}
switch (o._type)
{
// check number first as this is what is usually expected
case Types.Number:
return(((JsNumber)o)._value);
case Types.Undefined:
return(double.NaN);
case Types.Null:
return(0);
case Types.Boolean:
return(((JsBoolean)o)._value ? 1 : 0);
case Types.String:
return(ToNumber(o.AsStringWithoutTypeCheck()));
default:
return(ToNumber(ToPrimitive(o, Types.Number)));
}
}
/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-9.8
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static string ToString(JsValue o)
{
if (o._type == Types.Object && o is IPrimitiveInstance)
{
var p = o as IPrimitiveInstance;
return(ToString(ToPrimitive(p.PrimitiveValue, Types.String)));
}
switch (o._type)
{
case Types.String:
return(o.AsStringWithoutTypeCheck());
case Types.Boolean:
return(((JsBoolean)o)._value ? "true" : "false");
case Types.Number:
return(ToString(((JsNumber)o)._value));
case Types.Symbol:
return(o.AsSymbol());
case Types.Undefined:
return(Undefined.Text);
case Types.Null:
return(Null.Text);
default:
return(ToString(ToPrimitive(o, Types.String)));
}
}
private static string GetErrorMessage(JsValue error)
{
if (error.IsObject())
{
var oi = error.AsObject();
var message = oi.Get("message").ToString();
return(message);
}
if (error.IsString())
{
return(error.AsStringWithoutTypeCheck());
}
return(error.ToString());
}
public static ObjectInstance ToObject(Engine engine, JsValue value)
{
switch (value._type)
{
case Types.Object:
return((ObjectInstance)value);
case Types.Boolean:
return(engine.Boolean.Construct(((JsBoolean)value)._value));
case Types.Number:
return(engine.Number.Construct(((JsNumber)value)._value));
case Types.String:
return(engine.String.Construct(value.AsStringWithoutTypeCheck()));
case Types.Symbol:
return(engine.Symbol.Construct(((JsSymbol)value)._value));
default:
ExceptionHelper.ThrowTypeError(engine);
return(null);
}
}
public JsValue Serialize(JsValue value, JsValue replacer, JsValue space)
{
_stack = new Stack <object>();
// for JSON.stringify(), any function passed as the first argument will return undefined
// if the replacer is not defined. The function is not called either.
if (value.Is <ICallable>() && ReferenceEquals(replacer, Undefined.Instance))
{
return(Undefined.Instance);
}
if (replacer.IsObject())
{
if (replacer.Is <ICallable>())
{
_replacerFunction = replacer;
}
else
{
var replacerObj = replacer.AsObject();
if (replacerObj.Class == "Array")
{
_propertyList = new List <string>();
}
foreach (var property in replacerObj.GetOwnProperties().Select(x => x.Value))
{
JsValue v = _engine.GetValue(property, false);
string item = null;
if (v.IsString())
{
item = v.AsStringWithoutTypeCheck();
}
else if (v.IsNumber())
{
item = TypeConverter.ToString(v);
}
else if (v.IsObject())
{
var propertyObj = v.AsObject();
if (propertyObj.Class == "String" || propertyObj.Class == "Number")
{
item = TypeConverter.ToString(v);
}
}
if (item != null && !_propertyList.Contains(item))
{
_propertyList.Add(item);
}
}
}
}
if (space.IsObject())
{
var spaceObj = space.AsObject();
if (spaceObj.Class == "Number")
{
space = TypeConverter.ToNumber(spaceObj);
}
else if (spaceObj.Class == "String")
{
space = TypeConverter.ToString(spaceObj);
}
}
// defining the gap
if (space.IsNumber())
{
var number = ((JsNumber)space)._value;
if (number > 0)
{
_gap = new string(' ', (int)System.Math.Min(10, number));
}
else
{
_gap = string.Empty;
}
}
else if (space.IsString())
{
var stringSpace = space.AsStringWithoutTypeCheck();
_gap = stringSpace.Length <= 10 ? stringSpace : stringSpace.Substring(0, 10);
}
else
{
_gap = string.Empty;
}
var wrapper = _engine.Object.Construct(Arguments.Empty);
wrapper.DefineOwnProperty("", new PropertyDescriptor(value, PropertyFlag.ConfigurableEnumerableWritable), false);
return(Str("", wrapper));
}
