bug#68929: [PATCH] Copy which-key from GNU ELPA into core

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Eli Zaretskii <eliz@gnu.org>,  Jeremy Bryant <jb@jeremybryant.net>,
>   68929@debbugs.gnu.org
> Date: Thu, 08 Feb 2024 11:10:44 -0500
> 
> > 4. I never really liked the timer mechanism either, but I didn't find
> > an alternative to detecting when emacs was in the middle of reading a
> > key sequence. I like the idea of which-key as simply being a different
> > describe-prefix-bindings function, but my sense is that novices
> > appreciate the automatic popup. I'm wondering if anyone has any other
> > ideas. In principle, one could have a hook that emacs uses to notify
> > which-key that emacs is waiting on a key sequence, but maybe that is
> > overkill.
> 
> I don't have a strong opinion about the use of a timer.
> But maybe we could hook into the `echo-keystrokes` mechanism (and thus
> reuse its timer, which also defaults to 1s).

Yes, that'd be the first possibility I'd recommend to explore.