GNU bug report logs - #11072
Display of glyphless non-spacing modifiers via a static composition

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From: Stefan Kangas <stefan <at> marxist.se>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 11072 <at> debbugs.gnu.org, Kenichi Handa <handa <at> m17n.org>
Subject: bug#11072: Display of glyphless non-spacing modifiers via a static composition
Date: Thu, 31 Oct 2019 00:13:16 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Kenichi Handa <handa <at> m17n.org>
>> Cc: list-general <at> mohsen.1.banan.byname.net, emacs-devel <at> gnu.org
>> Date: Fri, 23 Mar 2012 10:41:07 +0900
>> 
>> In article <83fwd0wnwl.fsf <at> gnu.org>, Eli Zaretskii <eliz <at> gnu.org> writes:
>> 
>> > Btw, there's some strange problem in displaying one label of the
>> > hebrew-biblical-tiro input method: the character u+05ba (inserted by
>> > Shift-5 key) is displayed as a blank rectangle.  It looks like my
>> > fonts have no glyph for this character, but then why don't we display
>> > this like any other glyphless character: as a hex code inside a small
>> > rectangle?  That's what I get if I insert this character into a
>> > buffer, but somehow the way we display it in the keyboard layout (and
>> > in the "C-u C-x =" display under "decomposition") behaves differently.
>> > Why is that?
>> 
>> As that character is a non-spacing modifier, we display it
>> with a static composition, and a glyph in a static
>> composition are displayed by a blank rectangle if no font is
>> available.  This is because a hex code makes the resulting
>> display of composition (several glyphs may occupy a single
>> column) unreadable.
>> 
>> It may be possible to change the current code to use a hex
>> code displaying if a composition contains just one glyph and
>> that glyph has no font, but it may be for 24.2.
>
> So this bug will wait for after Emacs 24.1 release to be fixed.
>
> Thanks.

Hi Eli,

No update on this bug in 7 years.  Has this been fixed in the
intervening time?

Best regards,
Stefan Kangas

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