Re: scratch/emoji vs emacs that maybe canʼt display emojis

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: emacs-devel@gnu.org
> Date: Fri, 05 Nov 2021 14:38:41 +0100
> 
>     Eli> Does it behave correctly wrt the display width of the displayed 
> Emoji?
>     Eli> That is, does string-width agree with the number of columns the
>     Eli> displayed Emoji takes on the screen?
> 
> No, string-width gives 2, it actually takes up 1 column, which is
> unexpected for a non-composed character.

This means you will have a messed-up display.

>     >> On macos, in gui frames, I see similar issues until I cherry-pick
>     >> e3171e7e86, which says to me thereʼs an issue with the 'can I display
>     >> this codepoint' code.
> 
>     Eli> Indeed, how can we know that a particular TTY frame can display 
> Emoji?
>     Eli> For a single character, we have a more-or-less reliable method, but
>     Eli> for a composable sequence?
> 
> Well, this is a single character Iʼm trying to enter. And even if
> Emacs canʼt display the codepoints, it shouldn't break the transient.

With a single character it's supposed to work.  Where exactly does it
break? can you show the code?