Re: Emacs completion matches selection UI

[Stefan Monnier]

>>> That, and to also highlight the portion of the selected entry that
>>> matches if the match is partial.
SM> Hmm... don't we do that already?
> Not from in-buffer completion AFAICT.  Yes from minibuffer completion.

I see the same highlighting for in-buffer completion as for
minibuffer completion.  So please make a bug-report when you see
the problem.  It's probably an in-buffer completion which still uses
ad-hoc code rather than relying on the completion-at-point infrastructure.

> After thinking about it, I agree with Josh.  Proposal:
> 1) in minibuffer completion:
> `right' or `C-f' at minibuffer point-max enters completion candidates
> buffer (where then `up' and `down' are remapped, we have the user captive)
> `left' in the completion candidates buffer goes back to the minibuffer
> 2) in-buffer completion:
> enter completion candidates buffer immediately (where then `up' and
> `down' are remapped, we have the user captive).  Make it easy to get out
> and back to the original buffer.

Maybe "enter immediately" is also an option for the minibuffer case.
I agree that C-f at EOL in the minibuffer is a "safe" choice, but
I don't think that hijacking `up' and `down' would be problematic
either, because we'd only hijack them after displaying *Completions*,
and I expect users tend to rely on the history only *before* displaying
the *Completions*, but not so much afterwards.


        Stefan