public SlotList FilterNot(Delegate listener)
{
if (!this.nonEmpty || listener == null)
{
return(this);
}
if (listener == Head.Listener)
{
return(this.tail);
}
SlotList wholeClone = new SlotList(this.Head);
SlotList subClone = wholeClone;
SlotList current = this.tail;
while (current.nonEmpty)
{
if (current.Head.Listener == listener)
{
subClone.tail = current.tail;
return(wholeClone);
}
subClone = subClone.tail = new SlotList(current.Head);
current = current.tail;
}
return(this);
}
public SlotList Append(ISlot slot)
{
if (slot == null)
{
return(this);
}
if (!nonEmpty)
{
return(new SlotList(slot));
}
if (this.tail == NIL)
{
return(new SlotList(slot).Prepend(this.Head));
}
SlotList wholeClone = new SlotList(this.Head);
SlotList subClone = wholeClone;
SlotList current = this.tail;
while (current.nonEmpty)
{
subClone = subClone.tail = new SlotList(current.Head);
current = current.tail;
}
subClone.tail = new SlotList(slot);
return(wholeClone);
}
protected ISlot RegisterListener(Delegate listener, bool once = false)
{
if (this.RegisterPossible(listener, once))
{
ISlot newSlot = new Slot(listener, this, once);
slots = slots.Prepend(newSlot);
return(newSlot);
}
return(this.slots.Find(listener));
}
public ISlot Remove(Delegate listener)
{
ISlot slot = this.slots.Find(listener);
if (slot == null)
{
return(null);
}
this.slots = this.slots.FilterNot(listener);
return(slot);
}
public void Dispatch(params object[] args)
{
SlotList slotsToProcess = this.slots;
if (slotsToProcess.nonEmpty)
{
while (slotsToProcess.nonEmpty)
{
slotsToProcess.Head.Excute(args);
slotsToProcess = slotsToProcess.tail;
}
}
}
public bool Contains(Delegate listener)
{
if (!this.nonEmpty)
{
return(false);
}
SlotList p = this;
while (p.nonEmpty)
{
if (p.Head.Listener == listener)
{
return(true);
}
}
return(false);
}
public SlotList(ISlot head, SlotList tail = null)
{
if (head == null && tail == null)
{
nonEmpty = false;
}
else if (head == null)
{
throw new Exception("param head cannot be null");
}
else
{
this.Head = head;
this.tail = tail == null ? NIL : tail;
this.nonEmpty = true;
}
}
public ISlot Find(Delegate listener)
{
if (!nonEmpty)
{
return(null);
}
SlotList p = this;
while (p.nonEmpty)
{
if (p.Head.Listener == listener)
{
return(p.Head);
}
p = p.tail;
}
return(null);
}
public void RemoveAll()
{
this.slots = SlotList.NIL;
}
