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Re: use-default-font-for-symbols vs. emojis (was: Wrestling with set-fon
Re: use-default-font-for-symbols vs. emojis (was: Wrestling with set-fontset-font)
Fri, 27 Dec 2019 22:20:57 +0200
> From: Kévin Le Gouguec <firstname.lastname@example.org>
> Date: Fri, 27 Dec 2019 19:52:49 +0100
> > However, these considerations are unlikely to be relevant to
> > punctuation and other symbols, since the latter generally
> > aren't specific to any culture, and don't require
> > sophisticated OTF features. */
> Do emojis challenge this heuristic, since
> - they can typically use "sophisticated OTF features" such as color,
> - combining sequences are a thing?
We don't yet support these features, so they are largely irrelevant
for Emacs at this point. And (sadly) I don't see anyone around who
knows enough and has enough motivation and energy to teach Emacs to
> If so, could/should there be a way to distinguish "emoji" characters
> from the more general "symbol" script, using e.g. data from
If and when we need that, it will be almost trivial. What's
non-trivial is to add support for color emoji.
>  E.g. 🧟♂️, 🧟♀️, 🐕🦺, 🏴☠️, from
> <https://unicode.org/Public/emoji/12.1/emoji-zwj-sequences.txt>, or
> flag sequences from
> <https://unicode.org/Public/emoji/12.1/emoji-sequences.txt>; none of
> which work inside Emacs yet AFAICT.
> To be more precise: as of commit 9ee5af31, these examples appear
> "decombined". I have no idea what controls this (Harfbuzz? Cairo?)…
Could be a simple matter of defining more entries in
composition-function table to support these sequences (assuming the
font supports them).