/// <summary>
/// <see cref="DvMediaContainer.RemoveObject"/>
/// and <see cref="DvMediaContainer.RemoveObjects"/>
/// call this method before removing it from its child list.
/// This will automatically remove items that refer to this item
/// from their respective parents.
/// </summary>
public void NotifyPendingDelete()
{
lock (this.m_LockReferences)
{
this.m_Deleting = true;
ArrayList removeThese = new ArrayList();
if (m_ReferringItems != null)
{
//foreach (WeakReference wr in this.m_ReferringItems)
foreach (IDvItem referringItem in this.m_ReferringItems)
{
// force a strong reference of the target before checking it's alive
//IDvItem referringItem = (IDvItem) wr.Target;
//if (wr.IsAlive)
//{
IDvContainer parent = (IDvContainer)referringItem.Parent;
if (parent != null)
{
parent.RemoveObject(referringItem);
}
else
{
//removeThese.Add(wr);
removeThese.Add(referringItem);
}
//}
//else
//{
// removeThese.Add(wr);
//}
}
//foreach (WeakReference wr in removeThese)
foreach (IDvItem referringItem in removeThese)
{
//this.m_ReferringItems.Remove(wr);
this.m_ReferringItems.Remove(referringItem);
}
}
this.m_ReferringItems = null;
this.m_RefItem = null;
}
}
/// <summary>
/// This removes a container or item object from
/// the child list. It is used by other
/// RemoveXXX methods defined in this class
/// and implements the portion that allows
/// proper media server eventing.
/// <para>
/// Method properly tells items to notify all other
/// items that reference it that it will be deleted.
/// </para>
/// <para>
/// Method properly tells containers to recursively
/// remove their child objects, so that descendent
/// reference items are properly removed.
/// </para>
/// </summary>
/// <param name="removeThis"></param>
public override void RemoveObject(IUPnPMedia removeThis)
{
IDvMedia dv = removeThis as IDvMedia;
IDvItem item = removeThis as IDvItem;
IDvContainer container = removeThis as IDvContainer;
// Before we go about doing any removal operations,
// we fire the event to indicate this object is
// about to be removed.
ArrayList removeThese = new ArrayList(1);
removeThese.Add(removeThis);
if (this.OnChildrenToRemove != null)
{
this.OnChildrenToRemove(this, removeThese);
}
if (item != null)
{
// Notify any and all referring items that
// this object is about to be removed
// from its parent.
item.NotifyPendingDelete();
}
else if (container != null)
{
// Instruct all child containers to
// remove their own children.
IList children = container.CompleteList;
foreach (IDvMedia child in children)
{
container.RemoveObject(child);
}
}
// go ahead and remove this object
base.RemoveObject(removeThis);
// Notify that the child has formerly been
// removed.
if (this.OnChildrenRemoved != null)
{
this.OnChildrenRemoved(this, removeThese);
}
this.NotifyRootOfChange();
}
