Re: Allowing point to be outside the window?

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: emacs-devel@gnu.org
> Date: Sat, 25 Dec 2021 14:45:59 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > I already provided an example where this could not be what users
> > expect: some command inserts text before the window-start, which
> > causes the text shown in the window to move if we use the same
> > window-start position.  Now, window-start is a marker, so
> > theoretically we could use the same marker with the buffer position
> > updated due to the insertion, in which case the stuff displayed in the
> > window may stay unchanged.
> 
> > But is this what users will expect?  And if this is not what users
> > expect, i.e. if we will need to recompute window-start anew in that
> > case, we cannot use the "recenter around point" fallback.  Likewise
> > with bringing point into the view: will this be what users expect in
> > the described situation?
> 
> To be completely clear, the "recenter around point" fallback you allude
> to is the code under the `recenter' label in `redisplay_window',
> correct?

Yes.