| private FastSetProperty ( object key, object value, PropertyAttributes attributes = PropertyAttributes.Sealed, bool overwriteAttributes = false ) : void | ||
| key | object | The property key (either a string or a Symbol). |
| value | object | The intended value of the property. |
| attributes | PropertyAttributes | Attributes that indicate whether the property is writable, /// configurable and enumerable. |
| overwriteAttributes | bool | Indicates whether to overwrite any existing attributes. |
| return | void | |
public static ObjectInstance Freeze(ObjectInstance obj)
{
var properties = new List <PropertyNameAndValue>();
foreach (var property in obj.Properties)
{
properties.Add(property);
}
foreach (var property in properties)
{
obj.FastSetProperty(property.Key, property.Value,
property.Attributes & ~(PropertyAttributes.NonEnumerable), overwriteAttributes: true);
}
obj.IsExtensible = false;
return(obj);
}
public static ObjectInstance Seal([JSParameter(JSParameterFlags.DoNotConvert)] ObjectInstance obj)
{
var properties = new List <PropertyNameAndValue>();
foreach (var property in obj.Properties)
{
properties.Add(property);
}
foreach (var property in properties)
{
obj.FastSetProperty(property.Name, property.Value,
property.Attributes & ~PropertyAttributes.Configurable, overwriteAttributes: true);
}
obj.IsExtensible = false;
return(obj);
}
// METHODS
//_________________________________________________________________________________________
/// <summary>
/// Populates the given object with properties, field and methods based on the given .NET
/// type.
/// </summary>
/// <param name="target"> The object to populate. </param>
/// <param name="type"> The .NET type to search for methods. </param>
/// <param name="flags"> <c>BindingFlags.Static</c> to populate static methods;
/// <c>BindingFlags.Instance</c> to populate instance methods. </param>
internal static void PopulateMembers(ObjectInstance target, Type type, BindingFlags flags)
{
// Register static methods as functions.
var methodGroups = new Dictionary <string, List <MethodBase> >();
foreach (var member in type.GetMembers(BindingFlags.Public | BindingFlags.DeclaredOnly | flags))
{
switch (member.MemberType)
{
case MemberTypes.Method:
MethodInfo method = (MethodInfo)member;
List <MethodBase> methodGroup;
if (methodGroups.TryGetValue(method.Name, out methodGroup) == true)
{
methodGroup.Add(method);
}
else
{
methodGroups.Add(method.Name, new List <MethodBase>()
{
method
});
}
break;
case MemberTypes.Property:
PropertyInfo property = (PropertyInfo)member;
var getMethod = property.GetGetMethod();
ClrFunction getter = getMethod == null ? null : new ClrFunction(target.Engine.Function.InstancePrototype, new ClrBinder(getMethod));
var setMethod = property.GetSetMethod();
ClrFunction setter = setMethod == null ? null : new ClrFunction(target.Engine.Function.InstancePrototype, new ClrBinder(setMethod));
target.DefineProperty(property.Name, new PropertyDescriptor(getter, setter, PropertyAttributes.NonEnumerable), false);
// Property getters and setters also show up as methods, so remove them here.
// NOTE: only works if properties are enumerated after methods.
if (getMethod != null)
{
methodGroups.Remove(getMethod.Name);
}
if (setMethod != null)
{
methodGroups.Remove(setMethod.Name);
}
break;
case MemberTypes.Field:
FieldInfo field = (FieldInfo)member;
ClrFunction fieldGetter = new ClrFunction(target.Engine.Function.InstancePrototype, new FieldGetterBinder(field));
ClrFunction fieldSetter = new ClrFunction(target.Engine.Function.InstancePrototype, new FieldSetterBinder(field));
target.DefineProperty(field.Name, new PropertyDescriptor(fieldGetter, fieldSetter, PropertyAttributes.NonEnumerable), false);
break;
case MemberTypes.Constructor:
case MemberTypes.NestedType:
case MemberTypes.Event:
case MemberTypes.TypeInfo:
// Support not yet implemented.
break;
}
}
foreach (var methodGroup in methodGroups.Values)
{
var binder = new ClrBinder(methodGroup);
var function = new ClrFunction(target.Engine.Function.InstancePrototype, binder);
target.FastSetProperty(binder.Name, function, PropertyAttributes.NonEnumerable, overwriteAttributes: true);
}
}
// METHODS
//_________________________________________________________________________________________
/// <summary>
/// Populates the given object with properties, field and methods based on the given .NET
/// type.
/// </summary>
/// <param name="target"> The object to populate. </param>
/// <param name="type"> The .NET type to search for methods. </param>
/// <param name="flags"> <c>BindingFlags.Static</c> to populate static methods;
/// <c>BindingFlags.Instance</c> to populate instance methods. </param>
internal static void PopulateMembers(ObjectInstance target, Type type, BindingFlags flags)
{
// Register static methods as functions.
var methodGroups = new Dictionary<string, List<MethodBase>>();
foreach (var member in type.GetMembers(BindingFlags.Public | BindingFlags.DeclaredOnly | flags))
{
switch (member.MemberType)
{
case MemberTypes.Method:
MethodInfo method = (MethodInfo)member;
List<MethodBase> methodGroup;
if (methodGroups.TryGetValue(method.Name, out methodGroup) == true)
methodGroup.Add(method);
else
methodGroups.Add(method.Name, new List<MethodBase>() { method });
break;
case MemberTypes.Property:
PropertyInfo property = (PropertyInfo)member;
var getMethod = property.GetGetMethod();
ClrFunction getter = getMethod == null ? null : new ClrFunction(target.Engine.Function.InstancePrototype, new ClrBinder(getMethod));
var setMethod = property.GetSetMethod();
ClrFunction setter = setMethod == null ? null : new ClrFunction(target.Engine.Function.InstancePrototype, new ClrBinder(setMethod));
target.DefineProperty(property.Name, new PropertyDescriptor(getter, setter, PropertyAttributes.NonEnumerable), false);
// Property getters and setters also show up as methods, so remove them here.
// NOTE: only works if properties are enumerated after methods.
if (getMethod != null)
methodGroups.Remove(getMethod.Name);
if (setMethod != null)
methodGroups.Remove(setMethod.Name);
break;
case MemberTypes.Field:
FieldInfo field = (FieldInfo)member;
ClrFunction fieldGetter = new ClrFunction(target.Engine.Function.InstancePrototype, new FieldGetterBinder(field));
ClrFunction fieldSetter = new ClrFunction(target.Engine.Function.InstancePrototype, new FieldSetterBinder(field));
target.DefineProperty(field.Name, new PropertyDescriptor(fieldGetter, fieldSetter, PropertyAttributes.NonEnumerable), false);
break;
case MemberTypes.Constructor:
case MemberTypes.NestedType:
case MemberTypes.Event:
case MemberTypes.TypeInfo:
// Support not yet implemented.
break;
}
}
foreach (var methodGroup in methodGroups.Values)
{
var binder = new ClrBinder(methodGroup);
var function = new ClrFunction(target.Engine.Function.InstancePrototype, binder);
target.FastSetProperty(binder.Name, function, PropertyAttributes.NonEnumerable, overwriteAttributes: true);
}
}
// INITIALIZATION
//_________________________________________________________________________________________
/// <summary>
/// Creates a new instance of a built-in constructor function.
/// </summary>
/// <param name="prototype"> The next object in the prototype chain. </param>
/// <param name="name"> The name of the function. </param>
/// <param name="instancePrototype"> </param>
protected ClrFunction(ObjectInstance prototype, string name, ObjectInstance instancePrototype)
: base(prototype)
{
if (name == null)
throw new ArgumentNullException("name");
if (instancePrototype == null)
throw new ArgumentNullException("instancePrototype");
// This is a constructor so ignore the "this" parameter when the function is called.
thisBinding = this;
// Search through every method in this type looking for [JSFunction] attributes.
var callBinderMethods = new List<JSBinderMethod>(1);
var constructBinderMethods = new List<JSBinderMethod>(1);
var methods = this.GetType().GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly);
foreach (var method in methods)
{
// Search for the [JSCallFunction] and [JSConstructorFunction] attributes.
var callAttribute = (JSCallFunctionAttribute) Attribute.GetCustomAttribute(method, typeof(JSCallFunctionAttribute));
var constructorAttribute = (JSConstructorFunctionAttribute)Attribute.GetCustomAttribute(method, typeof(JSConstructorFunctionAttribute));
// Can't declare both attributes.
if (callAttribute != null && constructorAttribute != null)
throw new InvalidOperationException("Methods cannot be marked with both [JSCallFunction] and [JSConstructorFunction].");
if (callAttribute != null)
{
// Method is marked with [JSCallFunction]
callBinderMethods.Add(new JSBinderMethod(method, callAttribute.Flags));
}
else if (constructorAttribute != null)
{
var binderMethod = new JSBinderMethod(method, constructorAttribute.Flags);
constructBinderMethods.Add(binderMethod);
// Constructors must return ObjectInstance or a derived type.
if (typeof(ObjectInstance).IsAssignableFrom(binderMethod.ReturnType) == false)
throw new InvalidOperationException(string.Format("Constructors must return {0} (or a derived type).", typeof(ObjectInstance).Name));
}
}
// Initialize the Call function.
if (callBinderMethods.Count > 0)
this.callBinder = new JSBinder(callBinderMethods);
else
this.callBinder = new JSBinder(new JSBinderMethod(new Func<object>(() => Undefined.Value).Method));
// Initialize the Construct function.
if (constructBinderMethods.Count > 0)
this.constructBinder = new JSBinder(constructBinderMethods);
else
this.constructBinder = new JSBinder(new JSBinderMethod(new Func<ObjectInstance>(() => this.Engine.Object.Construct()).Method));
// Add function properties.
this.FastSetProperty("name", name);
this.FastSetProperty("length", this.callBinder.FunctionLength);
this.FastSetProperty("prototype", instancePrototype);
instancePrototype.FastSetProperty("constructor", this, PropertyAttributes.NonEnumerable);
}
// INITIALIZATION
//_________________________________________________________________________________________
/// <summary>
/// Creates a new instance of a built-in constructor function.
/// </summary>
/// <param name="prototype"> The next object in the prototype chain. </param>
/// <param name="name"> The name of the function. </param>
/// <param name="instancePrototype"> </param>
protected ClrFunction(ObjectInstance prototype, string name, ObjectInstance instancePrototype)
: base(prototype)
{
if (name == null)
{
throw new ArgumentNullException("name");
}
if (instancePrototype == null)
{
throw new ArgumentNullException("instancePrototype");
}
// This is a constructor so ignore the "this" parameter when the function is called.
thisBinding = this;
// Search through every method in this type looking for [JSFunction] attributes.
var callBinderMethods = new List <JSBinderMethod>(1);
var constructBinderMethods = new List <JSBinderMethod>(1);
var methods = this.GetType().GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly);
foreach (var method in methods)
{
// Search for the [JSCallFunction] and [JSConstructorFunction] attributes.
var callAttribute = (JSCallFunctionAttribute)Attribute.GetCustomAttribute(method, typeof(JSCallFunctionAttribute));
var constructorAttribute = (JSConstructorFunctionAttribute)Attribute.GetCustomAttribute(method, typeof(JSConstructorFunctionAttribute));
// Can't declare both attributes.
if (callAttribute != null && constructorAttribute != null)
{
throw new InvalidOperationException("Methods cannot be marked with both [JSCallFunction] and [JSConstructorFunction].");
}
if (callAttribute != null)
{
// Method is marked with [JSCallFunction]
callBinderMethods.Add(new JSBinderMethod(method, callAttribute.Flags));
}
else if (constructorAttribute != null)
{
var binderMethod = new JSBinderMethod(method, constructorAttribute.Flags);
constructBinderMethods.Add(binderMethod);
// Constructors must return ObjectInstance or a derived type.
if (typeof(ObjectInstance).IsAssignableFrom(binderMethod.ReturnType) == false)
{
throw new InvalidOperationException(string.Format("Constructors must return {0} (or a derived type).", typeof(ObjectInstance).Name));
}
}
}
// Initialize the Call function.
if (callBinderMethods.Count > 0)
{
this.callBinder = new JSBinder(callBinderMethods);
}
else
{
this.callBinder = new JSBinder(new JSBinderMethod(new Func <object>(() => Undefined.Value).Method));
}
// Initialize the Construct function.
if (constructBinderMethods.Count > 0)
{
this.constructBinder = new JSBinder(constructBinderMethods);
}
else
{
this.constructBinder = new JSBinder(new JSBinderMethod(new Func <ObjectInstance>(() => this.Engine.Object.Construct()).Method));
}
// Add function properties.
this.FastSetProperty("name", name);
this.FastSetProperty("length", this.callBinder.FunctionLength);
this.FastSetProperty("prototype", instancePrototype);
instancePrototype.FastSetProperty("constructor", this, PropertyAttributes.NonEnumerable);
}
public static ObjectInstance Seal(ObjectInstance obj)
{
var properties = new List<PropertyNameAndValue>();
foreach (var property in obj.Properties)
properties.Add(property);
foreach (var property in properties)
{
obj.FastSetProperty(property.Key, property.Value,
property.Attributes & ~PropertyAttributes.Configurable, overwriteAttributes: true);
}
obj.IsExtensible = false;
return obj;
}
