internal SharpObjectList(SharpObject parent, string name, SharpRowCursor source, SharpNode node = null, bool useCache = false)
{
_parent = parent;
_name = name;
_source = source;
_useCache = useCache;
_node = node;
}
public IEnumerator <SharpObject> GetEnumerator()
{
bool expandSource = false;
lock (_sync)
{
expandSource = !_isExpanded && _source != null;
}
if (_useCache)
{
int length = _items.Count;
for (int i = 0; i < length; i++)
{
if (_items[i] != null)
{
yield return(_items[i]);
}
}
}
if (expandSource)
{
List <SharpObject> newItems = new List <SharpObject>();
// Copy the cursor so this can be called by multiple threads
var cursor = new SharpRowCursor(_source);
cursor.Reset();
while (cursor.MoveNext())
{
if (_node != null && cursor.Current.Node != _node)
{
break;
}
var obj = new SharpObject(cursor.Current);
if (_useCache)
{
newItems.Add(obj);
}
yield return(obj);
}
lock (_sync)
{
if (!_isExpanded && _useCache)
{
_items.AddRange(newItems);
_isExpanded = true;
}
}
}
}
public SharpRowCursor(SharpRowCursor source)
{
_top = source._top;
_current = source._current;
_done = source._done;
}