bug#51210: Customizable other-window-for-scrolling

[Juri Linkov]

>>> BTW I think we should move 'other-window-for-scrolling' to
>>> window.el - all it does is call Lisp primitives.  And turn
>>> scroll_command into 'Fscroll_command' (or, better 'Fscroll_window') so
>>> things like 'scroll-down' (or, better 'scroll-window-down') and
>>> 'scroll-other-window-down' could end up in window.el too.  But maybe I'm
>>> missing some important detail.
>>
>> I agree it would be nice to move scrolling commands to Lisp.
>
> How do you envision being able to do that?  The implementation makes
> screen layout decisions by simulating redisplay, and that is not
> possible in Lisp, at least not without exposing new primitives (which
> I personally would object to, for more than one reason).

At least, 'other-window-for-scrolling' could be moved to window.el.