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bug#54970: 28.1; Some emoji no longer display
From: |
Eli Zaretskii |
Subject: |
bug#54970: 28.1; Some emoji no longer display |
Date: |
Sun, 17 Apr 2022 21:58:23 +0300 |
> From: Howard Melman <hmelman@gmail.com>
> Date: Sun, 17 Apr 2022 14:44:25 -0400
> Cc: Eli Zaretskii <eliz@gnu.org>,
> Alan Third <alan@idiocy.org>,
> Lars Ingebrigtsen <larsi@gnus.org>,
> 54970@debbugs.gnu.org
>
> I'm still confused as to why the above works but this didn't:
>
> (set-fontset-font t 'emoji '("Apple Color Emoji" . "iso10646-1") nil 'prepend)
Because that character is not in the emoji script:
(aref char-script-table #x1f37d) => symbol
> And I as I look at script-representative-chars, emoji is defined to be
> (emoji 127744 128512)
> which I think means the hex range x1F300 - x1F600 so shouldn't include x1f37d?
You misinterpret script-representative-chars. That doesn't mean the
range of characters between the values, but only the discrete examples
of the script's characters, which Emacs uses to see if a font supports
a script well enough to use it. IOW, only those specific codepoints
are used as representatives, not any others.
> Or does it not because the default expression is text? And if so how is that
> factored into the emoji script symbol passed to set-fontset-font, I don't see
> how that's defined other than as this range.
See lisp/international/charscript.el for how we assign characters to
scripts. (It's a file generated from the UCD.)
> > Those characters get composed, so they get treated as a single
> > unit. They really donʼt cause any problems.
>
> Well C-f and C-b seem to move point between them which is somewhat startling.
No, they shouldn't. If they do, it means you don't have character
composition working. "C-u C-x =" should describe the composition of
it happened.
> >>> Modulo `use-default-font-for-symbols'
> >
> > Howard> FWIW this variable set to t for me which I think is the default.
> >
> > I meant you should try setting it to 'nil'.
>
> In an emacs -Q in the scratch buffer I inserted a lone U+1F37D
> Toggling use-default-font-for-symbols had no effect on its display.
It will only have effect if the default font has a glyph for that
character.
- bug#54970: 28.1; Some emoji no longer display, (continued)
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/16
- bug#54970: 28.1; Some emoji no longer display, Eli Zaretskii, 2022/04/16
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/16
- bug#54970: 28.1; Some emoji no longer display, Eli Zaretskii, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display, Robert Pluim, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display, Robert Pluim, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display, Lars Ingebrigtsen, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display,
Eli Zaretskii <=
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/17
- bug#54970: 28.1; Some emoji no longer display, Eli Zaretskii, 2022/04/18
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/18
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/18
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/22
- bug#54970: 28.1; Some emoji no longer display, Eli Zaretskii, 2022/04/23
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/23
- bug#54970: 28.1; Some emoji no longer display, Eli Zaretskii, 2022/04/23
- bug#54970: 28.1; Some emoji no longer display, Howard Melman, 2022/04/23