bug#56691: outline-minor-mode displays navigation arrow buttons as emojis

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: Lars Ingebrigtsen <larsi@gnus.org>,  rpluim@gmail.com,
>   56691@debbugs.gnu.org,  hello@paulwrankin.com
> Date: Tue, 02 Aug 2022 19:57:55 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Yes, but is it reasonable to expect such a system?  I mean, if someone
> > builds an Emacs capable of displaying color Emoji, isn't it reasonable
> > to expect him/her to install a suitable font as well?  Color Emoji are
> > a "hot" feature, so I'd expect that.
> 
> The problem is that Emacs is built with color Emoji support by default.
> Most people do not know the necessary compile-time options to turn that
> support off.
> 
> > Also, do distros come without a color Emoji font nowadays?  Because
> > Symbola AFAIK needs to be installed, it isn't by default, so if a
> > color Emoji font _is_ available OOTB, I think the chances for the
> > problems you mention are very small, and/or are easily fixed.
> 
> Symbola comes with most systems OOTB.  I remember Firefox displaying
> Emoji using that font not too long ago, on a fresh install of RHEL 7.9.

<Shrug> I still feel it's wrong for a capability predicate to load
fonts etc., and generally be potentially very slow and expensive.