GNU bug report logs - #63731
[PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate

Previous Next

Full log

View this message in rfc822 format

From: Steven Allen <steven <at> stebalien.com>
To: Eli Zaretskii <eliz <at> gnu.org>, Robert Pluim <rpluim <at> gmail.com>
Cc: 63731 <at> debbugs.gnu.org
Subject: bug#63731: [PATCH] Support Emoji Variation Sequence 16 (FE0F) where appropriate
Date: Fri, 26 May 2023 08:06:11 -0700

Eli Zaretskii <eliz <at> gnu.org> writes:
> AFAIU, this change will populate composition-function-table for many
> "normal" characters, including ASCII digits and symbol/punctuation
> characters from the 0x2xxx blocks.  E.g., after you build Emacs with
> this patch, what do the following evaluations yield:
>
>   M-: (aref composition-function-table ?0) RET
>   M-: (aref composition-function-table #x2122) RET
>
> If they yield non-nil values, it could mean dramatic slowdown of
> redisplay with these characters.

Both of these yield nil with this patch applied (and I haven't noticed
any performance regressions). But it looks like you and Robert have a
better patch so I'll leave you to it.

However, I'd like to draw your attention to the existing hard-coded
VS-16 table here:

https://git.savannah.gnu.org/cgit/emacs.git/tree/admin/unidata/emoji-zwj.awk?h=4b3de748b0b04407d2492500c77905de56de1180#n72

It feels like this should either be the full table (the one in the
patch) or it shouldn't exist at all. But again, I'm not the expert here.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.