public IRequireConfiguration Parse(ObjectExpression expression, SyntaxNode root)
        {
            if (expression == null)
            {
                return null;
            }

            var baseUrl = GetBaseUrl(expression.GetProperty(RequireKey.BaseUrl).GetValue(root));

            var packages = TransformPackages(root, expression.GetProperty(RequireKey.Packages)).ToList();

            var paths = TransformPaths(root, expression.GetProperty(RequireKey.Paths));

            var maps = TransformMaps(expression.GetProperty(RequireKey.Map));

            return new RequireConfiguration
                   {
                       BaseUrl = baseUrl,
                       Packages = packages,
                       Paths = paths,
                       Maps = maps
                   };
        }
Пример #2
0
        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;
        }
Пример #3
0
 private void EmitObjectExpression(ObjectExpression e)
 {
     Write("{ ");
     bool first = true;
     foreach (var p in e.Properties)
     {
         if (first) first = false; else Write(", ");
         Emit(p.Key);
         Write(": ");
         Emit(p.Value);
     }
     Write("}");
 }