/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-13.2
/// </summary>
/// <param name="functionDeclaration"></param>
/// <returns></returns>
public FunctionInstance CreateFunctionObject(FunctionDeclaration functionDeclaration)
{
var functionObject = new ScriptFunctionInstance(
Engine,
functionDeclaration,
LexicalEnvironment.NewDeclarativeEnvironment(Engine, Engine.ExecutionContext.LexicalEnvironment),
functionDeclaration.Strict
)
{
Extensible = true
};
return(functionObject);
}
public ObjectInstance Construct(JsValue[] arguments)
{
var argCount = arguments.Length;
string p = "";
string body = "";
if (argCount == 1)
{
body = TypeConverter.ToString(arguments[0]);
}
else if (argCount > 1)
{
var firstArg = arguments[0];
p = TypeConverter.ToString(firstArg);
for (var k = 1; k < argCount - 1; k++)
{
var nextArg = arguments[k];
p += "," + TypeConverter.ToString(nextArg);
}
body = TypeConverter.ToString(arguments[argCount-1]);
}
var parameters = this.ParseArgumentNames(p);
var parser = new JavaScriptParser();
FunctionExpression function;
try
{
var functionExpression = "function(" + p + ") { " + body + "}";
function = parser.ParseFunctionExpression(functionExpression);
}
catch (ParserError)
{
throw new JavaScriptException(Engine.SyntaxError);
}
// todo: check if there is not a way to use the FunctionExpression directly instead of creating a FunctionDeclaration
var functionObject = new ScriptFunctionInstance(
Engine,
new FunctionDeclaration
{
Type = SyntaxNodes.FunctionDeclaration,
Body = new BlockStatement
{
Type = SyntaxNodes.BlockStatement,
Body = new [] { function.Body }
},
Parameters = parameters.Select(x => new Identifier
{
Type = SyntaxNodes.Identifier,
Name = x
}).ToArray(),
FunctionDeclarations = function.FunctionDeclarations,
VariableDeclarations = function.VariableDeclarations
},
LexicalEnvironment.NewDeclarativeEnvironment(Engine, Engine.ExecutionContext.LexicalEnvironment),
function.Strict
) { Extensible = true };
return functionObject;
}
/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-13.2
/// </summary>
/// <param name="functionDeclaration"></param>
/// <returns></returns>
public FunctionInstance CreateFunctionObject(FunctionDeclaration functionDeclaration)
{
var functionObject = new ScriptFunctionInstance(
Engine,
functionDeclaration,
LexicalEnvironment.NewDeclarativeEnvironment(Engine, Engine.ExecutionContext.LexicalEnvironment),
functionDeclaration.Strict
) { Extensible = true };
return functionObject;
}
public ObjectInstance Construct(JsValue[] arguments)
{
var argCount = arguments.Length;
string p = "";
string body = "";
if (argCount == 1)
{
body = TypeConverter.ToString(arguments[0]);
}
else if (argCount > 1)
{
var firstArg = arguments[0];
p = TypeConverter.ToString(firstArg);
for (var k = 1; k < argCount - 1; k++)
{
var nextArg = arguments[k];
p += "," + TypeConverter.ToString(nextArg);
}
body = TypeConverter.ToString(arguments[argCount - 1]);
}
var parameters = this.ParseArgumentNames(p);
var parser = new JavaScriptParser();
FunctionExpression function;
try
{
var functionExpression = "function(" + p + ") { " + body + "}";
function = parser.ParseFunctionExpression(functionExpression);
}
catch (ParserError)
{
throw new JavaScriptException(Engine.SyntaxError);
}
// todo: check if there is not a way to use the FunctionExpression directly instead of creating a FunctionDeclaration
var functionObject = new ScriptFunctionInstance(
Engine,
new FunctionDeclaration
{
Type = SyntaxNodes.FunctionDeclaration,
Body = new BlockStatement
{
Type = SyntaxNodes.BlockStatement,
Body = new [] { function.Body }
},
Parameters = parameters.Select(x => new Identifier
{
Type = SyntaxNodes.Identifier,
Name = x
}).ToArray(),
FunctionDeclarations = function.FunctionDeclarations,
VariableDeclarations = function.VariableDeclarations
},
LexicalEnvironment.NewDeclarativeEnvironment(Engine, Engine.ExecutionContext.LexicalEnvironment),
function.Strict
)
{
Extensible = true
};
return(functionObject);
}
public JsValue EvaluateFunctionExpression(FunctionExpression functionExpression)
{
var funcEnv = LexicalEnvironment.NewDeclarativeEnvironment(_engine, _engine.ExecutionContext.LexicalEnvironment);
var envRec = (DeclarativeEnvironmentRecord)funcEnv.Record;
if (functionExpression.Id != null && !String.IsNullOrEmpty(functionExpression.Id.Name))
{
envRec.CreateMutableBinding(functionExpression.Id.Name);
}
var closure = new ScriptFunctionInstance(
_engine,
functionExpression,
funcEnv,
functionExpression.Strict
);
if (functionExpression.Id != null && !String.IsNullOrEmpty(functionExpression.Id.Name))
{
envRec.InitializeImmutableBinding(functionExpression.Id.Name, closure);
}
return closure;
}
public JsValue EvaluateObjectExpression(ObjectExpression objectExpression)
{
// http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.5
var obj = _engine.Object.Construct(Arguments.Empty);
foreach (var property in objectExpression.Properties)
{
var propName = property.Key.GetKey();
var previous = obj.GetOwnProperty(propName);
PropertyDescriptor propDesc;
switch (property.Kind)
{
case PropertyKind.Data:
var exprValue = _engine.EvaluateExpression(property.Value);
var propValue = _engine.GetValue(exprValue);
propDesc = new PropertyDescriptor(propValue, true, true, true);
break;
case PropertyKind.Get:
var getter = property.Value as FunctionExpression;
if (getter == null)
{
throw new JavaScriptException(_engine.SyntaxError);
}
ScriptFunctionInstance get;
using (new StrictModeScope(getter.Strict))
{
get = new ScriptFunctionInstance(
_engine,
getter,
_engine.ExecutionContext.LexicalEnvironment,
StrictModeScope.IsStrictModeCode
);
}
propDesc = new PropertyDescriptor(get: get, set: null, enumerable: true, configurable:true);
break;
case PropertyKind.Set:
var setter = property.Value as FunctionExpression;
if (setter == null)
{
throw new JavaScriptException(_engine.SyntaxError);
}
ScriptFunctionInstance set;
using (new StrictModeScope(setter.Strict))
{
set = new ScriptFunctionInstance(
_engine,
setter,
_engine.ExecutionContext.LexicalEnvironment,
StrictModeScope.IsStrictModeCode
);
}
propDesc = new PropertyDescriptor(get:null, set: set, enumerable: true, configurable: true);
break;
default:
throw new ArgumentOutOfRangeException();
}
if (previous != PropertyDescriptor.Undefined)
{
if (StrictModeScope.IsStrictModeCode && previous.IsDataDescriptor() && propDesc.IsDataDescriptor())
{
throw new JavaScriptException(_engine.SyntaxError);
}
if (previous.IsDataDescriptor() && propDesc.IsAccessorDescriptor())
{
throw new JavaScriptException(_engine.SyntaxError);
}
if (previous.IsAccessorDescriptor() && propDesc.IsDataDescriptor())
{
throw new JavaScriptException(_engine.SyntaxError);
}
if (previous.IsAccessorDescriptor() && propDesc.IsAccessorDescriptor())
{
if (propDesc.Set.HasValue && previous.Set.HasValue)
{
throw new JavaScriptException(_engine.SyntaxError);
}
if (propDesc.Get.HasValue && previous.Get.HasValue)
{
throw new JavaScriptException(_engine.SyntaxError);
}
}
}
obj.DefineOwnProperty(propName, propDesc, false);
}
return obj;
}
