[She had not slept until seven in years and was finding it quite agreeable]

This is from the novel 'Gray Mountain' and I am not sure what it meant. Does that mean that she didn't sleep untill seven or mean that she slept but woke before seven?


For years she had always woken up / got up before seven. I assume it means that this particular day was an exception, i.e. she did sleep until or beyond seven.


Thank you very much.