Re: feature/icomplete-vertical

[Gregory Heytings via "Emacs development discussions." <emacs-devel@gnu.org>]

>> The solution in this thread works at the Lisp level, and will not 
>> affect other uses of the miniwindow, because it relies on a 
>> minibuffer-local variable.  AFAICS it is also safe wrt recursive 
>> editing.
>
> Using a buffer-local variable doesn't necessarily eliminate the problems 
> with recursive-edit. And using window-scroll-functions for this purpose 
> is a no-no.  So I cannot endorse this others solution, either.
>

Once again I have to stop a discussion with you, because I do not want to 
start a public dispute with you.  You reject everything I propose with 
vague statements about "potential problems", without any detail or recipe 
that would help me or others to see whether these "potential problems" are 
real or minor ones.

Note that what you object to (using set-window-start in 
window-scroll-functions) is, in fact, already used twice in Emacs core.

In em-smart.el, eshell-smart-initialize adds eshell-smart-scroll-window to 
window-scroll-functions, eshell-smart-scroll-window calls 
eshell-smart-redisplay, and eshell-smart-redisplay uses set-window-start. 
Likewise, follow.el adds follow-avoid-tail-recenter to 
window-scroll-functions, and follow-avoid-tail-recenter uses 
set-window-start.

In both cases, the code was already present in Emacs 21.  Which means that 
it has been used for twenty years without known problems.