bug#18739: 24.3; Request for a hook to be provided when scrolling will move the cursor

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: josh+gnu@nispio.net,  18739@debbugs.gnu.org
> Date: Wed, 15 Oct 2014 18:48:16 -0400
> 
> >> It would be helpful to have a hook that would be called before any
> >> scrolling command moves the cursor.  In other words, I want to be
> >> notified when an update to the display will force the location of
> >> `point' to change in the current buffer.
> > What's wrong with window-scroll-functions?
> 
> But these are also called when point is not affected, right?

Yes.  But it's easy to detect that situation, I think.