private static string GetErrorMessage(JsValue error)
{
if (error.IsObject())
{
var oi = error.AsObject();
var message = oi.Get("message").AsString();
return message;
}
else
return string.Empty;
}
/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-9.1
/// </summary>
/// <param name="input"></param>
/// <param name="preferredType"></param>
/// <returns></returns>
public static JsValue ToPrimitive(JsValue input, Types preferredType = Types.None)
{
if (input == Null.Instance || input == Undefined.Instance)
{
return input;
}
if (input.IsPrimitive())
{
return input;
}
return input.AsObject().DefaultValue(preferredType);
}
private JsValue Sort(JsValue thisObj, JsValue[] arguments)
{
if (!thisObj.IsObject())
{
throw new JavaScriptException(Engine.TypeError, "Array.prorotype.sort can only be applied on objects");
}
var obj = thisObj.AsObject();
var len = obj.Get("length");
var lenVal = TypeConverter.ToInt32(len);
if (lenVal <= 1)
{
return obj;
}
var compareArg = arguments.At(0);
ICallable compareFn = null;
if (compareArg != Undefined.Instance)
{
compareFn = compareArg.TryCast<ICallable>(x =>
{
throw new JavaScriptException(Engine.TypeError, "The sort argument must be a function");
});
}
Comparison<JsValue> comparer = (x, y) =>
{
if (x == Undefined.Instance && y == Undefined.Instance)
{
return 0;
}
if (x == Undefined.Instance)
{
return 1;
}
if (y == Undefined.Instance)
{
return -1;
}
if (compareFn != null)
{
var s = (int) TypeConverter.ToUint32(compareFn.Call(Undefined.Instance, new[] {x, y}));
return s;
}
var xString = TypeConverter.ToString(x);
var yString = TypeConverter.ToString(y);
var r = System.String.CompareOrdinal(xString, yString);
return r;
};
var array = Enumerable.Range(0, lenVal).Select(i => obj.Get(i.ToString())).ToArray();
// don't eat inner exceptions
try
{
System.Array.Sort(array, comparer);
}
catch (InvalidOperationException e)
{
throw e.InnerException;
}
foreach (var i in Enumerable.Range(0, lenVal))
{
obj.Put(i.ToString(), array[i], false);
}
return obj;
}
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>() && 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);
string item = null;
if (v.IsString())
{
item = v.AsString();
}
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())
{
if (space.AsNumber() > 0) {
_gap = new System.String(' ', (int)System.Math.Min(10, space.AsNumber()));
}
else
{
_gap = string.Empty;
}
}
else if (space.IsString())
{
var stringSpace = space.AsString();
_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, true, true, true), false);
return Str("", wrapper);
}
public static ObjectInstance ToObject(Engine engine, JsValue value)
{
if (value.IsObject())
{
return value.AsObject();
}
if (value == Undefined.Instance)
{
throw new JavaScriptException(engine.TypeError);
}
if (value == Null.Instance)
{
throw new JavaScriptException(engine.TypeError);
}
if (value.IsBoolean())
{
return engine.Boolean.Construct(value.AsBoolean());
}
if (value.IsNumber())
{
return engine.Number.Construct(value.AsNumber());
}
if (value.IsString())
{
return engine.String.Construct(value.AsString());
}
throw new JavaScriptException(engine.TypeError);
}
/// <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.IsObject())
{
var p = o.AsObject() as IPrimitiveInstance;
if (p != null)
{
o = p.PrimitiveValue;
}
}
if (o.IsString())
{
return o.AsString();
}
if (o == Undefined.Instance)
{
return Undefined.Text;
}
if (o == Null.Instance)
{
return Null.Text;
}
if (o.IsBoolean())
{
return o.AsBoolean() ? "true" : "false";
}
if (o.IsNumber())
{
return NumberPrototype.ToNumberString(o.AsNumber());
}
return ToString(ToPrimitive(o, Types.String));
}
/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-9.3
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static double ToNumber(JsValue o)
{
// check number first as this is what is usually expected
if (o.IsNumber())
{
return o.AsNumber();
}
if (o.IsObject())
{
var p = o.AsObject() as IPrimitiveInstance;
if (p != null)
{
o = p.PrimitiveValue;
}
}
if (o == Undefined.Instance)
{
return double.NaN;
}
if (o == Null.Instance)
{
return 0;
}
if (o.IsBoolean())
{
return o.AsBoolean() ? 1 : 0;
}
if (o.IsString())
{
var s = o.AsString().Trim();
if (String.IsNullOrEmpty(s))
{
return 0;
}
if ("+Infinity".Equals(s) || "Infinity".Equals(s))
{
return double.PositiveInfinity;
}
if ("-Infinity".Equals(s))
{
return double.NegativeInfinity;
}
// todo: use a common implementation with JavascriptParser
try
{
if (!s.StartsWith("0x", StringComparison.OrdinalIgnoreCase))
{
var start = s[0];
if (start != '+' && start != '-' && start != '.' && !char.IsDigit(start))
{
return double.NaN;
}
double n = Double.Parse(s,
NumberStyles.AllowDecimalPoint | NumberStyles.AllowLeadingSign |
NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite |
NumberStyles.AllowExponent, CultureInfo.InvariantCulture);
if (s.StartsWith("-") && n.Equals(0))
{
return -0.0;
}
return n;
}
int i = int.Parse(s.Substring(2), NumberStyles.HexNumber, CultureInfo.InvariantCulture);
return i;
}
catch (OverflowException)
{
return s.StartsWith("-") ? double.NegativeInfinity : double.PositiveInfinity;
}
catch
{
return double.NaN;
}
}
return ToNumber(ToPrimitive(o, Types.Number));
}
