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bug#57072: [BUG] update-glyphless-char-display and variation selectors
From: |
Eli Zaretskii |
Subject: |
bug#57072: [BUG] update-glyphless-char-display and variation selectors |
Date: |
Tue, 16 Aug 2022 15:01:22 +0300 |
> From: Robert Pluim <rpluim@gmail.com>
> Cc: Axel Svensson <svenssonaxel@gmail.com>, 57072@debbugs.gnu.org
> Date: Tue, 16 Aug 2022 13:55:52 +0200
>
> >>>>> On Wed, 10 Aug 2022 16:10:46 +0300, Eli Zaretskii <eliz@gnu.org> said:
>
> >> From: Axel Svensson <svenssonaxel@gmail.com>
> >> Date: Tue, 9 Aug 2022 22:33:40 +0200
> >> Cc: 57072@debbugs.gnu.org
> >>
> >> > Now, VS16 is almost always composed with preceding characters, so I
> >> > think you can only see it as acronym if you deliberately force Emacs
> >> > not to compose it, e.g. by preceding it with U+20DD COMBINING
> >> > ENCLOSING CIRCLE, or precede it and follow it by U+200C ZERO WIDTH
> >> > NON-JOINER, or disable auto-composition-mode.
> >>
> >> - Preceding it with U+20DD still produces the empty box
> >> - Preceding it and following it by U+200C still produces the empty box
> >> - Disabling auto-composition-mode produces the "VS16" acronym.
>
> Eli> Yes, I think this is because of the special composition rules we have
> Eli> for VS16 (which are required to display Emoji sequences correctly).
>
> I guess we could adjust the composition rules for U+FE0F, but getting
> that right could be tricky (there are many of them, and there will be
> ordering dependencies).
We could, but I'm not sure it's worth the hassle. There's no
particular reason for people to want to display VS-16 as an acronym,
of all the ways, since it almost always should be composed.
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Axel Svensson, 2022/08/09
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Eli Zaretskii, 2022/08/11
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Axel Svensson, 2022/08/11
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Eli Zaretskii, 2022/08/11
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Axel Svensson, 2022/08/11
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Eli Zaretskii, 2022/08/12
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Axel Svensson, 2022/08/12
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Eli Zaretskii, 2022/08/12
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Axel Svensson, 2022/08/12
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Eli Zaretskii, 2022/08/12
- bug#57072: [BUG] update-glyphless-char-display and variation selectors, Axel Svensson, 2022/08/12