/// <summary>
/// Overriden. Returns a property descriptor.
/// </summary>
/// <remarks>
/// Tries to resolve proeprty in the following order:
///
/// 1. OwnProperty for the current scope
/// 2. Any property from the bag (if specified).
/// 3. A property from scopes hierarchy.
///
/// A proeprty from the bag will be added as a link to the current scope.
/// </remarks>
/// <param name="index">Property name.</param>
/// <returns>Descriptor</returns>
public override Descriptor GetDescriptor(string index)
{
Descriptor own, d;
if ((own = base.GetDescriptor(index)) != null && own.Owner == this)
{
return(own);
}
if (bag != null && (d = bag.GetDescriptor(index)) != null)
{
Descriptor link = new LinkedDescriptor(this, d.Name, d, bag);
DefineOwnProperty(link);
return(link);
}
return(own);
}
/// <summary>
/// Constructs new descriptor
/// </summary>
/// <param name="owner">An owner of the new descriptor</param>
/// <param name="name">A name of the new descriptor</param>
/// <param name="source">A property descriptor of the target object to which we should link to</param>
/// <param name="that">A target object to whose property we are linking. This parameter will be
/// used in the calls to a 'Get' and 'Set' properties of the source descriptor.</param>
public LinkedDescriptor(JsDictionaryObject owner, string name, Descriptor source, JsDictionaryObject that)
: base(owner, name)
{
if (source.isReference)
{
LinkedDescriptor sourceLink = source as LinkedDescriptor;
d = sourceLink.d;
m_that = sourceLink.m_that;
}
else
{
d = source;
}
Enumerable = true;
Writable = true;
Configurable = true;
m_that = that;
}
/// <summary>
/// Overriden. Returns a property descriptor.
/// </summary>
/// <remarks>
/// Tries to resolve proeprty in the following order:
///
/// 1. OwnProperty for the current scope
/// 2. Any property from the bag (if specified).
/// 3. A property from scopes hierarchy.
///
/// A proeprty from the bag will be added as a link to the current scope.
/// </remarks>
/// <param name="index">Property name.</param>
/// <returns>Descriptor</returns>
public override Descriptor GetDescriptor(string index)
{
Descriptor own, d;
if ((own = base.GetDescriptor(index)) != null && own.Owner == this)
return own;
if (bag != null && (d = bag.GetDescriptor(index)) != null) {
Descriptor link = new LinkedDescriptor(this, d.Name, d, bag);
DefineOwnProperty(link);
return link;
}
return own;
}
