Re: Unicode 13 Emoji ranges composed with wrong font on NS port

[Robert Pluim]

>>>>> On Wed, 13 Oct 2021 18:56:04 +0300, Eli Zaretskii <eliz@gnu.org> said:

    >> From: Robert Pluim <rpluim@gmail.com>
    >> Cc: alan@idiocy.org,  wyuenho@gmail.com,  emacs-devel@gnu.org
    >> Date: Wed, 13 Oct 2021 16:59:15 +0200
    >> 
    Eli> But VS-15 is not about variant glyphs, it's about requesting the "text
    Eli> representation" of certain characters, including Emoji.  So it sounds
    Eli> like the rule for compose-gstring-for-variation-glyph is not really
    Eli> relevant for it, as well as for VS-16.  Right?
    >> 
    >> The VS-15 rule actually needs to continue to use
    >> compose-gstring-for-variation-glyph, because if I change it to use
    >> compose-gstring-for-graphic, the font_range change kicks in, and Emacs
    >> displays the Emoji presentation for codepoints followed by VS-15.

    Eli> OK.  We should carefully document all this complexity in some
    Eli> comments, I think.

I suspect getting the comments right will take at least as long as
getting the code right :-)

Robert
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