public void AddUndoItem(IUndoItem undoEvent)
{
if (Working)
{
return;
}
bool emptyBefore = (_batch?.Count ?? 0) == 0 && !_undoEvents.Any();
if (_batch != null)
{
_batch.Add(undoEvent);
}
else
{
ClearRedoHistory();
_undoEvents.Push(undoEvent);
if (_undoEvents.Count > MAX_UNDO_ITEMS)
{
// XXX: we throw away the current item? this should be a Dequeue so we can pop the front
_undoEvents.Pop();
}
}
if (emptyBefore)
{
// no longer empty
NonEmpty?.Invoke(this, EventArgs.Empty);
}
}
public void AddUndoItem(IUndoItem undoEvent)
{
if (!_working)
{
if (_batch != null)
{
_batch.Add(undoEvent);
}
else
{
ClearRedoHistory();
_undoEvents.Push(undoEvent);
if (_undoEvents.Count > MAX_UNDO_ITEMS)
{
_undoEvents.Pop();
}
}
}
}
