public string this[string key]
{
get
{
if (key == null)
{
return(null);
}
return(GetSafe <string>(() =>
{
int index = IndexOf(key);
if (index < 0)
{
return null;
}
return _allItems[index].Value;
}));
}
set
{
if (key == null)
{
throw new ArgumentNullException();
}
InvokeSafe(() =>
{
int index = IndexOf(key);
if (index < 0)
{
index = _allItems.Count;
_allItems.Add(new UriQueryItem(key, value));
_keyItemIndexes.Add(index);
EventQueueManager.Raise(PropertyName_Keys, RaisePropertyChanged);
EventQueueManager.Raise(PropertyName_Values, RaisePropertyChanged);
EventQueueManager.Raise(PropertyName_Count, RaisePropertyChanged);
}
else
{
UriQueryItem item = _allItems[index];
if ((item.Value == null) ? value == null : value != null && item.Value == value)
{
return;
}
item.Value = value;
EventQueueManager.Raise(PropertyName_Values, RaisePropertyChanged);
}
});
}
}
private void InvokeSafe(Action method)
{
EventQueueManager.Invoke(_syncRoot, method);
}
public UriQueryItem this[int index]
{
get { return(GetSafe <UriQueryItem>(() => _allItems[index])); }
set
{
if (value == null)
{
throw new ArgumentNullException();
}
if (index < 0)
{
throw new IndexOutOfRangeException();
}
InvokeSafe(() =>
{
if (index == _allItems.Count)
{
Add(value);
return;
}
UriQueryItem oldItem = _allItems[index];
if (ReferenceEquals(oldItem, value))
{
return;
}
for (int i = 0; i < _allItems.Count; i++)
{
if (ReferenceEquals(_allItems[i], value))
{
MoveItem(i, index);
return;
}
}
oldItem.PropertyChanged -= Item_PropertyChanged;
_allItems[index] = value;
value.PropertyChanged += Item_PropertyChanged;
if (_keyComparer.Equals(oldItem.Key, value.Key))
{
if (IndexOf(oldItem.Key) == index)
{
if (oldItem.Key != value.Key)
{
EventQueueManager.Raise(PropertyName_Keys, RaisePropertyChanged);
}
if ((oldItem.Value == null) ? value.Value != null : (value.Value == null || oldItem.Value != value.Value))
{
EventQueueManager.Raise(PropertyName_Values, RaisePropertyChanged);
}
}
}
else
{
int keyIndex = IndexOf(value.Key);
if (keyIndex > index)
{
_keyItemIndexes.Remove(keyIndex);
}
else if (keyIndex > -1)
{
_keyItemIndexes.Remove(index);
}
for (int i = index + 1; i < _allItems.Count; i++)
{
if (_keyComparer.Equals(_allItems[i].Key, oldItem.Key))
{
_keyItemIndexes.Add(i);
break;
}
}
EventQueueManager.Raise(PropertyName_Keys, RaisePropertyChanged);
EventQueueManager.Raise(PropertyName_Values, RaisePropertyChanged);
}
});
}
}
private T GetSafe <T>(Func <T> func)
{
return(EventQueueManager.Get(_syncRoot, func));
}
