/// <summary>
/// Adds a listener to the inner list of listeners.
/// </summary>
/// <param name="rootObjectHashCode"><paramref name="listener"/>s root object hash code.</param>
/// <param name="listener">The listener to add.</param>
internal static void AddListener(int rootObjectHashCode, NestedMarkupExtension listener)
{
if (listener == null)
{
return;
}
lock (listenersLock)
{
// Do we have a listeners list for this root object yet, if not add it.
if (!listeners.ContainsKey(rootObjectHashCode))
{
listeners[rootObjectHashCode] = new List <WeakReference>();
}
// Check, if this listener already was added.
foreach (var wr in listeners[rootObjectHashCode].ToList())
{
var targetReference = wr.Target;
if (targetReference == null)
{
listeners[rootObjectHashCode].Remove(wr);
}
else if (targetReference == listener)
{
return;
}
else
{
var existing = (NestedMarkupExtension)targetReference;
var targets = existing.GetTargetObjectsAndProperties();
foreach (var target in targets)
{
if (listener.IsConnected(target))
{
listeners[rootObjectHashCode].Remove(wr);
break;
}
}
}
}
// Add it now.
listeners[rootObjectHashCode].Add(new WeakReference(listener));
}
}
/// <summary>
/// Adds a listener to the inner list of listeners.
/// </summary>
/// <param name="listener">The listener to add.</param>
internal static void AddListener(NestedMarkupExtension listener)
{
if (listener == null)
{
return;
}
lock (listenersLock)
{
// Check, if this listener already was added.
foreach (var wr in listeners.ToList())
{
var targetReference = wr.Target;
if (targetReference == null)
{
listeners.Remove(wr);
}
else if (targetReference == listener)
{
return;
}
else
{
var existing = (NestedMarkupExtension)targetReference;
var targets = existing.GetTargetObjectsAndProperties();
foreach (var target in targets)
{
if (listener.IsConnected(target))
{
listeners.Remove(wr);
break;
}
}
}
}
// Add it now.
listeners.Add(new WeakReference(listener));
}
}