public static ObjectInstance Create(ScriptEngine engine, object prototype, [DefaultParameterValue(null)] object propertiesArg)
{
var properties = JurassicHelper.GetTypedArgumentValue <ObjectInstance>(engine, propertiesArg, null);
if ((prototype is ObjectInstance) == false && prototype != Null.Value)
{
throw new JavaScriptException(engine, "TypeError", "object prototype must be an object or null");
}
ObjectInstance result = prototype == Null.Value
? ObjectInstance.CreateRootObject(engine)
: ObjectInstance.CreateRawObject((ObjectInstance)prototype);
if (properties != null)
{
DefineProperties(result, properties);
}
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="engine"></param>
/// <param name="name"></param>
/// <param name="extends"></param>
/// <param name="constructor"></param>
/// <returns></returns>
public static FunctionInstance ConstructClass(ScriptEngine engine, string name, object extends, UserDefinedFunction constructor)
{
if (extends is FunctionInstance extendsFunction)
{
// If extends doesn't have [[Construct]] then throw a TypeError.
return(new ClassFunction(extendsFunction, name, ObjectInstance.CreateRawObject(extendsFunction.InstancePrototype), constructor));
}
else if (extends == Null.Value)
{
return(new ClassFunction(engine.Function.InstancePrototype, name, ObjectInstance.CreateRootObject(engine), constructor));
}
else
{
if (extends != null)
{
throw new JavaScriptException(ErrorType.TypeError, $"Class {name} cannot extend '{extends}' as it is not a constructor.");
}
return(new ClassFunction(engine.Function.InstancePrototype, name, engine.Object.Construct(), constructor));
}
}
public ScriptEngine()
{
// Create the initial hidden class schema. This must be done first.
this.emptySchema = HiddenClassSchema.CreateEmptySchema();
// Create the base of the prototype chain.
var baseObject = ObjectInstance.CreateRootObject(this);
// Create the global object.
this.globalObject = new GlobalObject(baseObject);
// Create the function object that second to last in the prototype chain.
var baseFunction = UserDefinedFunction.CreateEmptyFunction(baseObject);
// Object must be created first, then function.
this.objectConstructor = new ObjectConstructor(baseFunction, baseObject);
this.functionConstructor = new FunctionConstructor(baseFunction, baseFunction);
// Create all the built-in objects.
this.mathObject = new MathObject(baseObject);
this.jsonObject = new JSONObject(baseObject);
// Create all the built-in functions.
this.arrayConstructor = new ArrayConstructor(baseFunction);
this.booleanConstructor = new BooleanConstructor(baseFunction);
this.dateConstructor = new DateConstructor(baseFunction);
this.numberConstructor = new NumberConstructor(baseFunction);
this.regExpConstructor = new RegExpConstructor(baseFunction);
this.stringConstructor = new StringConstructor(baseFunction);
// Create the error functions.
this.errorConstructor = new ErrorConstructor(baseFunction, "Error");
this.rangeErrorConstructor = new ErrorConstructor(baseFunction, "RangeError");
this.typeErrorConstructor = new ErrorConstructor(baseFunction, "TypeError");
this.syntaxErrorConstructor = new ErrorConstructor(baseFunction, "SyntaxError");
this.uriErrorConstructor = new ErrorConstructor(baseFunction, "URIError");
this.evalErrorConstructor = new ErrorConstructor(baseFunction, "EvalError");
this.referenceErrorConstructor = new ErrorConstructor(baseFunction, "ReferenceError");
// Populate the instance prototypes (TODO: optimize this, currently takes about 15ms).
this.globalObject.PopulateFunctions();
this.objectConstructor.PopulateFunctions();
this.objectConstructor.InstancePrototype.PopulateFunctions();
this.functionConstructor.InstancePrototype.PopulateFunctions(typeof(FunctionInstance));
this.mathObject.PopulateFunctions();
this.mathObject.PopulateFields();
this.jsonObject.PopulateFunctions();
this.arrayConstructor.PopulateFunctions();
this.arrayConstructor.InstancePrototype.PopulateFunctions();
this.booleanConstructor.InstancePrototype.PopulateFunctions();
this.dateConstructor.PopulateFunctions();
this.dateConstructor.InstancePrototype.PopulateFunctions();
this.numberConstructor.InstancePrototype.PopulateFunctions();
this.numberConstructor.PopulateFields();
this.regExpConstructor.InstancePrototype.PopulateFunctions();
this.stringConstructor.PopulateFunctions();
this.stringConstructor.InstancePrototype.PopulateFunctions();
this.errorConstructor.InstancePrototype.PopulateFunctions();
// Add them as JavaScript-accessible properties of the global instance.
this.globalObject.FastSetProperty("Array", this.arrayConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("Boolean", this.booleanConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("Date", this.dateConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("Function", this.functionConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("JSON", this.jsonObject, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("Math", this.mathObject, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("Number", this.numberConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("Object", this.objectConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("RegExp", this.regExpConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("String", this.stringConstructor, PropertyAttributes.NonEnumerable);
// And the errors.
this.globalObject.FastSetProperty("Error", this.errorConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("RangeError", this.rangeErrorConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("TypeError", this.typeErrorConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("SyntaxError", this.syntaxErrorConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("URIError", this.uriErrorConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("EvalError", this.evalErrorConstructor, PropertyAttributes.NonEnumerable);
this.globalObject.FastSetProperty("ReferenceError", this.referenceErrorConstructor, PropertyAttributes.NonEnumerable);
}