ITextUndoHistory ITextUndoHistoryRegistry.RegisterHistory(object context)
{
IBasicUndoHistory history;
if (!_map.TryGetValue(context, out history))
{
history = new BasicUndoHistory(context);
_map.Add(context, history);
}
return(history);
}
internal BasicUndoTransaction(BasicUndoHistory textUndoHistory, string description)
{
_textUndoHistory = textUndoHistory;
Description = description;
}