public ITextUndoHistory RegisterHistory(object context)
{
ITextUndoHistory history;
if (!_map.TryGetValue(context, out history))
{
history = new TextUndoHistory();
_map.Add(context, history);
}
return history;
}
public TextUndoTransaction(TextUndoHistory textUndoHistory, string description)
{
_textUndoHistory = textUndoHistory;
Description = description;
}
