On Thu, 29 Apr 2021 at 12:07, Stefan Monnier <monnier@iro.umontreal.ca>
wrote:

> >   `(defadvice ,f (after emacspeak pre act comp)
> >      (message "scroll advice: start = %d end = %d diff = %d"
> >               (window-start)
> >               (window-end)
> >               (- (window-end) (window-start))))))
>
> I think this may return outdated values for `window-end` because it is
> run before the window end position has been recomputed by redisplay.
> If that's not what you want, then you need to pass non-nil value for the
> `update` argument.
>
>
Thanks Stefan, you nailed it. That was exactly the problem. I should have
spotted it when I checked the docs for window-end.

regards,

Tim

--
Tim Cross