bug#61553: 29.0.60; Inconsistent use of dialog boxes by read-multiple-choice

[Eli Zaretskii <eliz@gnu.org>]

> From: Augusto Stoffel <arstoffel@gmail.com>
> Cc: 61553@debbugs.gnu.org
> Date: Thu, 16 Feb 2023 19:36:36 +0100
> 
> On Thu, 16 Feb 2023 at 19:59, Eli Zaretskii wrote:
> 
> >>     (read-multiple-choice "Question" '((?y "yes") (?n "no")) nil nil t)
> >> 
> >> Then I get a minibuffer query, but I would expect a dialog box in the
> >> case as well.
> >
> > The long-form call does a completing-read, and we don't support that
> > via GUI dialogs (how could we?).
> 
> Of course.  The point is what takes precedence: the decision to prefer a
> dialog over keyboard input, or the decision to do a completing-read
> instead of reading a single char?

I don't think the function itself can make that decision.  Only the
caller knows what's right for the context.

> The purpose of long-form is to protect the user from doing something
> dangerous by accidentally pressing a key.

That's only one possible cause of using the long form.  There could be
others.

> So instead of adding a special case for kill-buffer, I would rather
> modify the behavior of RMC to just ignore the long-form argument if
> (use-dialog-box-p) returns t.  Apart from that, your patch seems fine.

I disagree that rmc.el should make that decision.  It isn't its call
(pun intended).