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Re: Better emoji support
From: |
Robert Pluim |
Subject: |
Re: Better emoji support |
Date: |
Mon, 20 Sep 2021 19:32:23 +0200 |
>>>>> On Mon, 20 Sep 2021 18:27:31 +0300, Eli Zaretskii <eliz@gnu.org> said:
>> From: Robert Pluim <rpluim@gmail.com>
>> Cc: kevin.legouguec@gmail.com, emacs-devel@gnu.org
>> Date: Mon, 20 Sep 2021 15:50:49 +0200
>>
Eli> Btw, we could perhaps tweak the composition code to produce emoji
Eli> representation for the likes of U+231A followed by VS-16, even though
Eli> U+231A etc. aren't in the emoji script. Remind me about this after
Eli> the basic emoji composition code is installed, and let's see if it
Eli> could be improved for those sequences.
>>
>> ? U+231A has Emoji_Presentation=Yes.
Eli> Well, bad example. U+21AA is better.
OK
>> In any case, donʼt you need at least one codepoint to be using the
>> emoji font to do that? (Noto Color Emoji doesnʼt have a glyph for
>> VS-16, so that canʼt be used)
Eli> My idea is to trick the font_range function, which verifies that the
Eli> sequence can be composed using a single font, to use an Emoji font
Eli> when it sees something followed by a variation selector, instead of
Eli> the font for the first character in the sequence. For that, the rules
Eli> for Emoji sequences in composition-function-table should be anchored
Eli> on the VS-n codepoints (which I think is a good idea regardless).
Weʼd have to raise the lookback limit for composition-function-table
rules higher than 3 (maybe only to 4).
I guess it reduces the number of entries in
composition-function-table, but then you end up with a lot of rules
for eg VS-16. emoji-zwj-sequences.txt would result in about 840 rules,
with a lot of redundancy, which could be reduced, but I think that can
wait until after the zwj sequence stuff goes in.
Robert
--
- Re: Better emoji support, (continued)
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support, Kévin Le Gouguec, 2021/09/20
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support, Robert Pluim, 2021/09/20
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support, Robert Pluim, 2021/09/20
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support, Robert Pluim, 2021/09/20
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support,
Robert Pluim <=
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support, Robert Pluim, 2021/09/20
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support, Robert Pluim, 2021/09/20
- Re: Better emoji support, Robert Pluim, 2021/09/20
- Re: Better emoji support, Eli Zaretskii, 2021/09/20
- Re: Better emoji support, Jean-Christophe Helary, 2021/09/17
- Re: Better emoji support, Daniel Martín, 2021/09/17
- Re: Better emoji support, Robert Pluim, 2021/09/17
- Re: Better emoji support, Stephen Berman, 2021/09/17