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bug#39799: 28.0.50; Most emoji sequences don’t render correctly
From: |
Eli Zaretskii |
Subject: |
bug#39799: 28.0.50; Most emoji sequences don’t render correctly |
Date: |
Tue, 21 Sep 2021 21:20:07 +0300 |
> Date: Tue, 21 Sep 2021 19:50:00 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: rgm@gnu.org, 39799@debbugs.gnu.org, mfabian@redhat.com
>
> I will take a look at the code.
AFAICT, the composition machinery doesn't allow to have a rule with
non-zero PREV-CHARS where PREV-CHARS are supposed to match characters
that have their own rules in composition-function-table. Such rules
are never considered, because once the rules for a character are
processed, we never reconsider what to do with that character. I will
ask Kenichi Handa whether my conclusion is indeed correct, but for
now, I think we should take the fire escape you mentioned earlier:
> >> Iʼve just tried adding "\N{U+1F469}\N{U+1F3FE}" to the composition
> >> function table regexp for U+1F469 manually, and now I get correct
> >> composition. That means we could process the
> >> RGI_Emoji_Modifier_Sequence entries from emoji-sequences.txt with
> >> emoji-zwj.awk and add them, indexed on the base character (and remove
> >> the above code).
> >>
>
> This turns out to be a pretty small change, so if we donʼt get to the
> bottom of it we have an alternative.
AFAIU, this means we will add 1F3FB..1F3FF to the characters that can
follow each of those which have rules with zero lookback.
Thanks.
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, (continued)
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Mike FABIAN, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2021/09/21
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly,
Eli Zaretskii <=
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2021/09/22
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2021/09/22
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2021/09/24
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Eli Zaretskii, 2021/09/24
- bug#39799: 28.0.50; Most emoji sequences don’t render correctly, Robert Pluim, 2021/09/24