// 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);
}
}
/// <summary>
/// Populates the object with functions by searching a .NET type for methods marked with
/// the [JSFunction] attribute. Should be called only once at startup.
/// </summary>
/// <param name="type"> The type to search for methods. </param>
internal protected void PopulateFunctions(Type type)
{
if (type == null)
type = this.GetType();
// Group the methods on the given type by name.
var functions = new Dictionary<string, MethodGroup>(20);
var methods = type.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly);
foreach (var method in methods)
{
// Make sure the method has the [JSFunction] attribute.
var attribute = (JSFunctionAttribute)Attribute.GetCustomAttribute(method, typeof(JSFunctionAttribute));
if (attribute == null)
continue;
// Determine the name of the method.
string name;
if (attribute.Name != null)
{
name = Compiler.Lexer.ResolveIdentifier(this.Engine, attribute.Name);
if (name == null)
throw new InvalidOperationException(string.Format("The name provided to [JSFunction] on {0} is not a valid identifier.", method));
}
else
name = method.Name;
// Get a reference to the method group.
MethodGroup methodGroup;
if (functions.ContainsKey(name) == false)
{
methodGroup = new MethodGroup { Methods = new List<JSBinderMethod>(1), Length = -1 };
functions.Add(name, methodGroup);
}
else
methodGroup = functions[name];
// Add the method to the list.
methodGroup.Methods.Add(new JSBinderMethod(method, attribute.Flags));
// If the length doesn't equal -1, that indicates an explicit length has been set.
// Make sure it is consistant with the other methods.
if (attribute.Length >= 0)
{
if (methodGroup.Length != -1 && methodGroup.Length != attribute.Length)
throw new InvalidOperationException(string.Format("Inconsistant Length property detected on {0}.", method));
methodGroup.Length = attribute.Length;
}
}
// Now set the relevant properties on the object.
foreach (KeyValuePair<string, MethodGroup> pair in functions)
{
string name = pair.Key;
MethodGroup methodGroup = pair.Value;
// Add the function as a property of the object.
this.FastSetProperty(name, new ClrFunction(this.Engine.Function.InstancePrototype, methodGroup.Methods, name, methodGroup.Length), PropertyAttributes.NonEnumerable);
}
PropertyInfo[] properties = type.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly);
foreach (PropertyInfo prop in properties)
{
var attribute = Attribute.GetCustomAttribute(prop, typeof(JSPropertyAttribute), false) as JSPropertyAttribute;
if (attribute == null)
continue;
string name;
if (!string.IsNullOrEmpty(attribute.Name))
{
name = Compiler.Lexer.ResolveIdentifier(this.Engine, attribute.Name);
if (name == null)
throw new InvalidOperationException(string.Format("The name provided to [JSProperty] on {0} is not a valid identifier.", prop));
}
else
{
name = prop.Name;
}
ClrFunction getter = null, setter = null;
PropertyAttributes descriptorAttributes = PropertyAttributes.Sealed;
if (prop.CanRead)
{
var getMethod = prop.GetGetMethod(true);
getter = new ClrFunction(engine.Function.InstancePrototype, new ClrBinder(getMethod));
descriptorAttributes |= PropertyAttributes.IsAccessorProperty;
}
if (prop.CanWrite)
{
var setMethod = prop.GetSetMethod();
setter = new ClrFunction(engine.Function.InstancePrototype, new ClrBinder(setMethod));
descriptorAttributes |= PropertyAttributes.Writable;
}
if (attribute.IsEnumerable)
descriptorAttributes |= PropertyAttributes.Enumerable;
if (attribute.IsConfigurable)
descriptorAttributes |= PropertyAttributes.Configurable;
PropertyDescriptor descriptor = new PropertyDescriptor(getter, setter, descriptorAttributes);
this.DefineProperty(name, descriptor, true);
}
}
/// <summary>
/// Populates the object with functions by searching a .NET type for methods marked with
/// the [JSFunction] attribute. Should be called only once at startup. Also automatically
/// populates properties marked with the [JSProperty] attribute.
/// </summary>
/// <param name="type"> The type to search for methods. </param>
/// <param name="bindingFlags"> The binding flags to use to search for properties and methods. </param>
internal protected void PopulateFunctions(Type type, BindingFlags bindingFlags)
{
if (type == null)
type = this.GetType();
// Group the methods on the given type by name.
var functions = new Dictionary<string, MethodGroup>(20);
var methods = type.GetMethods(bindingFlags);
foreach (var method in methods)
{
// Make sure the method has the [JSInternalFunction] attribute.
var attribute = (JSFunctionAttribute)Attribute.GetCustomAttribute(method, typeof(JSFunctionAttribute));
if (attribute == null)
continue;
// Determine the name of the method.
string name;
if (attribute.Name != null)
name = attribute.Name;
else
name = method.Name;
// Get a reference to the method group.
MethodGroup methodGroup;
if (functions.ContainsKey(name) == false)
{
methodGroup = new MethodGroup { Methods = new List<JSBinderMethod>(1), Length = -1 };
functions.Add(name, methodGroup);
}
else
methodGroup = functions[name];
// Internal functions return nulls as undefined.
if (attribute is JSInternalFunctionAttribute)
attribute.Flags |= JSFunctionFlags.ConvertNullReturnValueToUndefined;
// Add the method to the list.
methodGroup.Methods.Add(new JSBinderMethod(method, attribute.Flags));
// If the length doesn't equal -1, that indicates an explicit length has been set.
// Make sure it is consistant with the other methods.
if (attribute.Length >= 0)
{
if (methodGroup.Length != -1 && methodGroup.Length != attribute.Length)
throw new InvalidOperationException(string.Format("Inconsistant Length property detected on {0}.", method));
methodGroup.Length = attribute.Length;
}
// Check property attributes.
var descriptorAttributes = PropertyAttributes.Sealed;
if (attribute.IsEnumerable)
descriptorAttributes |= PropertyAttributes.Enumerable;
if (attribute.IsConfigurable)
descriptorAttributes |= PropertyAttributes.Configurable;
if (attribute.IsWritable)
descriptorAttributes |= PropertyAttributes.Writable;
if (methodGroup.Methods.Count > 1 && methodGroup.PropertyAttributes != descriptorAttributes)
throw new InvalidOperationException(string.Format("Inconsistant property attributes detected on {0}.", method));
methodGroup.PropertyAttributes = descriptorAttributes;
}
// Now set the relevant properties on the object.
foreach (KeyValuePair<string, MethodGroup> pair in functions)
{
string name = pair.Key;
MethodGroup methodGroup = pair.Value;
// Add the function as a property of the object.
this.FastSetProperty(name, new ClrFunction(this.Engine.Function.InstancePrototype, methodGroup.Methods, name, methodGroup.Length), methodGroup.PropertyAttributes);
}
PropertyInfo[] properties = type.GetProperties(bindingFlags);
foreach (PropertyInfo prop in properties)
{
var attribute = Attribute.GetCustomAttribute(prop, typeof(JSPropertyAttribute), false) as JSPropertyAttribute;
if (attribute == null)
continue;
// The property name.
string name;
if (attribute.Name != null)
name = attribute.Name;
else
name = prop.Name;
// The property getter.
ClrFunction getter = null;
if (prop.CanRead)
{
var getMethod = prop.GetGetMethod(true);
getter = new ClrFunction(engine.Function.InstancePrototype, new JSBinderMethod[] { new JSBinderMethod(getMethod) }, name, 0);
}
// The property setter.
ClrFunction setter = null;
if (prop.CanWrite)
{
var setMethod = prop.GetSetMethod((bindingFlags & BindingFlags.NonPublic) != 0);
if (setMethod != null)
setter = new ClrFunction(engine.Function.InstancePrototype, new JSBinderMethod[] { new JSBinderMethod(setMethod) }, name, 1);
}
// The property attributes.
var descriptorAttributes = PropertyAttributes.Sealed;
if (attribute.IsEnumerable)
descriptorAttributes |= PropertyAttributes.Enumerable;
if (attribute.IsConfigurable)
descriptorAttributes |= PropertyAttributes.Configurable;
// Define the property.
var descriptor = new PropertyDescriptor(getter, setter, descriptorAttributes);
this.DefineProperty(name, descriptor, true);
}
}
