/// <summary>
/// Defines or redefines the value and attributes of a property. The prototype chain is
/// not searched so if the property exists but only in the prototype chain a new property
/// will be created.
/// </summary>
/// <param name="key"> The property key of the property to modify. </param>
/// <param name="descriptor"> The property value and attributes. </param>
/// <param name="throwOnError"> <c>true</c> to throw an exception if the property could not
/// be set. This can happen if the property is not configurable or the object is sealed. </param>
/// <returns> <c>true</c> if the property was successfully modified; <c>false</c> otherwise. </returns>
public override bool DefineProperty(object key, PropertyDescriptor descriptor, bool throwOnError)
{
// Check if the property is an indexed property.
uint arrayIndex = ArrayInstance.ParseArrayIndex(key);
if (arrayIndex < this.Length)
{
return(IsCompatiblePropertyDescriptor(IsExtensible, descriptor, GetOwnPropertyDescriptor(arrayIndex)));
}
// Delegate to the base class.
return(base.DefineProperty(key, descriptor, throwOnError));
}
public static new ArrayInstance OwnKeys(object target)
{
if (target is ObjectInstance targetObjectInstance)
{
// Indexes should be in numeric order.
var indexes = new List <uint>();
foreach (var key in targetObjectInstance.OwnKeys)
{
if (key is string keyStr)
{
uint arrayIndex = ArrayInstance.ParseArrayIndex(keyStr);
if (arrayIndex != uint.MaxValue)
{
indexes.Add(arrayIndex);
}
}
}
indexes.Sort();
var result = targetObjectInstance.Engine.Array.New();
foreach (uint index in indexes)
{
result.Push(index.ToString());
}
// Strings, in insertion order.
foreach (var key in targetObjectInstance.OwnKeys)
{
if (key is string keyStr)
{
uint arrayIndex = ArrayInstance.ParseArrayIndex(keyStr);
if (arrayIndex == uint.MaxValue)
{
result.Push(keyStr);
}
}
}
// Symbols, in insertion order.
foreach (var key in targetObjectInstance.OwnKeys)
{
if (key is Symbol)
{
result.Push(key);
}
}
return(result);
}
throw new JavaScriptException(ErrorType.TypeError, "Reflect.ownKeys called on non-object.");
}
public static ArrayInstance OwnKeys(ObjectInstance target)
{
// Indexes should be in numeric order.
var indexes = new List <uint>();
foreach (var property in target.Properties)
{
if (property.Key is string key)
{
uint arrayIndex = ArrayInstance.ParseArrayIndex(key);
if (arrayIndex != uint.MaxValue)
{
indexes.Add(arrayIndex);
}
}
}
indexes.Sort();
var result = target.Engine.Array.New();
foreach (uint index in indexes)
{
result.Push(index.ToString());
}
// Strings, in insertion order.
foreach (var property in target.Properties)
{
if (property.Key is string key)
{
uint arrayIndex = ArrayInstance.ParseArrayIndex(key);
if (arrayIndex == uint.MaxValue)
{
result.Push(property.Key);
}
}
}
// Symbols, in insertion order.
foreach (var property in target.Properties)
{
if (property.Key is Symbol)
{
result.Push(property.Key);
}
}
return(result);
}
public static ArrayInstance GetOwnPropertyNames(ObjectInstance obj)
{
// Indexes should be in numeric order.
var indexes = new List <uint>();
foreach (var key in obj.OwnKeys)
{
if (key is string keyStr)
{
uint arrayIndex = ArrayInstance.ParseArrayIndex(keyStr);
if (arrayIndex != uint.MaxValue)
{
indexes.Add(arrayIndex);
}
}
}
indexes.Sort();
var result = obj.Engine.Array.New();
foreach (uint index in indexes)
{
result.Push(index.ToString());
}
// Strings, in insertion order.
foreach (var key in obj.OwnKeys)
{
if (key is string keyStr)
{
uint arrayIndex = ArrayInstance.ParseArrayIndex(keyStr);
if (arrayIndex == uint.MaxValue)
{
result.Push(keyStr);
}
}
}
return(result);
}