| public SetPropertyValue ( object key, object value, bool throwOnError ) : void | ||
| key | object | The property key of the property to set. |
| value | object | The value to set the property to. This must be a javascript
/// primitive (double, string, etc) or a class derived from |
| throwOnError | bool | |
| return | void | |
public static ObjectInstance Assign(ScriptEngine engine, ObjectInstance target, params object[] sources)
{
foreach (var rawSource in sources)
{
// Ignore undefined or null sources.
if (rawSource == null || rawSource == Undefined.Value || rawSource == Null.Value)
continue;
var source = TypeConverter.ToObject(engine, rawSource);
// Copy the enumerable properties from the source object.
foreach (var property in source.Properties)
if (property.IsEnumerable == true)
target.SetPropertyValue(property.Key, property.Value, throwOnError: true);
}
return target;
}
public static ObjectInstance Assign(ScriptEngine engine, ObjectInstance target, params object[] sources)
{
foreach (var rawSource in sources)
{
// Ignore undefined or null sources.
if (rawSource == null || rawSource == Undefined.Value || rawSource == Null.Value)
{
continue;
}
var source = TypeConverter.ToObject(engine, rawSource);
// Copy the enumerable properties from the source object.
foreach (var property in source.Properties)
{
if (property.IsEnumerable == true)
{
target.SetPropertyValue(property.Key, property.Value, target, throwOnError: true);
}
}
}
return(target);
}
/// <summary>
/// Sets the value of the property with the given name. If a property with the given name
/// does not exist, or exists in the prototype chain (and is not a setter) then a new
/// property is created.
/// </summary>
/// <param name="key"> The property key of the property to set. </param>
/// <param name="value"> The value to set the property to. This must be a javascript
/// primitive (double, string, etc) or a class derived from <see cref="ObjectInstance"/>. </param>
/// <param name="thisValue"> The value of the "this" keyword inside a setter. </param>
/// <param name="throwOnError"> <c>true</c> to throw an exception if the property could not
/// be set (i.e. if the property is read-only or if the object is not extensible and a new
/// property needs to be created). </param>
/// <returns> <c>false</c> if <paramref name="throwOnError"/> is false and an error
/// occurred; <c>true</c> otherwise. </returns>
public override bool SetPropertyValue(object key, object value, object thisValue, bool throwOnError)
{
// Check for revocation.
if (target == null || handler == null)
{
throw new JavaScriptException(ErrorType.TypeError, "Cannot call 'set' on a proxy that has been revoked.");
}
// Call the handler, if one exists.
var trap = handler.GetMethod("set");
if (trap == null)
{
return(target.SetPropertyValue(key, value, thisValue, throwOnError));
}
var result = TypeConverter.ToBoolean(trap.CallLateBound(handler, target, key, value, thisValue));
if (!result)
{
return(false);
}
// Validate.
var targetDescriptor = target.GetOwnPropertyDescriptor(key);
if (targetDescriptor.Exists && !targetDescriptor.IsConfigurable)
{
if (!targetDescriptor.IsAccessor && !targetDescriptor.IsWritable && !TypeComparer.SameValue(value, targetDescriptor.Value))
{
throw new JavaScriptException(ErrorType.TypeError, $"'set' on proxy: trap returned truish for property '{TypeConverter.ToString(key)}' which exists in the proxy target as a non-configurable and non-writable data property with a different value.");
}
if (targetDescriptor.IsAccessor && targetDescriptor.Setter == null)
{
throw new JavaScriptException(ErrorType.TypeError, $"'set' on proxy: trap returned truish for property '{TypeConverter.ToString(key)}' which exists in the proxy target as a non-configurable and non-writable accessor property without a setter.");
}
}
return(true);
}
public static ObjectInstance Assign(ScriptEngine engine, ObjectInstance target, params object[] sources)
{
foreach (var rawSource in sources)
{
// Ignore undefined or null sources.
if (rawSource == null || rawSource == Undefined.Value || rawSource == Null.Value)
{
continue;
}
var source = TypeConverter.ToObject(engine, rawSource);
// Copy the enumerable properties from the source object.
foreach (var key in source.OwnKeys)
{
var descriptor = source.GetOwnPropertyDescriptor(key);
if (descriptor.IsEnumerable)
{
// Spec says call [[Get]] instead of using the value from the descriptor.
target.SetPropertyValue(key, source[key], target, throwOnError: true);
}
}
}
return(target);
}
/// <summary>
/// Sets the number of items in the array.
/// </summary>
/// <param name="thisObj"> The array that is being operated on. </param>
/// <param name="value"> The new value of the length property. </param>
private static void SetLength(ObjectInstance thisObj, uint value)
{
if (thisObj is ArrayInstance)
((ArrayInstance)thisObj).Length = value;
else
thisObj.SetPropertyValue("length", (double)value, true);
}
public static bool Set(ObjectInstance target, object propertyKey, object value, object receiver)
{
propertyKey = TypeConverter.ToPropertyKey(propertyKey);
return(target.SetPropertyValue(propertyKey, value, throwOnError: false));
}
