From: Stephen Berman <stephen.berman@gmx.net>
To: Eli Zaretskii <eliz@gnu.org>
Cc: larsi@gnus.org, cedric.chepied@gmail.com, 14461@debbugs.gnu.org
Subject: bug#14461: 24.3.50; bad display for 'space' + (U+0336) unicode combination
Date: Sat, 17 Aug 2019 15:50:20 +0200 [thread overview]
Message-ID: <87r25jucir.fsf@gmx.net> (raw)
In-Reply-To: <83d0h4ngrx.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 17 Aug 2019 15:00:18 +0300")
On Sat, 17 Aug 2019 15:00:18 +0300 Eli Zaretskii <eliz@gnu.org> wrote:
>> From: Stephen Berman <stephen.berman@gmx.net>
>> Date: Thu, 15 Aug 2019 14:29:08 +0200
>> Cc: 14461@debbugs.gnu.org, Lars Ingebrigtsen <larsi@gnus.org>
>>
>> ... I assume combining characters are always displayed after a space
>> instead of over it -- at least that's what I see with e.g. U+0301
>> (COMBINING ACUTE ACCENT) and U+0302 (COMBINING CIRCUMFLEX ACCENT).
>> That makes sense to me (otherwise, you couldn't visually distinguish
>> e.g. the sequence 'aU+0301U+0302' from the sequence 'aU+0301 U+0302')
>
> I don't see why: the former should be displayed as a single grapheme
> cluster, with both diacritics on top of a, whereas the latter should
> be displayed as 2 grapheme clusters, with U+0302 on top of the SPC
> character instead of on top of a.
Hm, I chose COMBINING ACUTE ACCENT and COMBINING CIRCUMFLEX ACCENT more
or less at random, but I do indeed see the sequence 'aU+0301U+0302' as
two grapheme clusters (also with -Q): 'a' with an acute accent over it
followed by a circumflex. In contrast, the sequences 'aU+0301U+0317'
and 'aU+0302U+0317' are displayed as single grapheme clusters (317 is
COMBINING ACUTE ACCENT BELOW). I also noticed that the seqence
'-U+0301U+0302' is displayed as a dash followed by a single grapheme
cluster of an acute accent and a circumflex; this holds for all
nonalphabetic ASCII characters I tried and for some but not all
non-ASCII alphabetic characters. So there seems to be some
inconsistency in the display of combining characters.
Steve Berman
next prev parent reply other threads:[~2019-08-17 13:50 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-24 14:30 bug#14461: 24.3.50; bad display for 'space' + (U+0336) unicode combination Cédric Chépied
2019-08-15 4:50 ` Lars Ingebrigtsen
2019-08-15 9:01 ` Stephen Berman
2019-08-15 10:02 ` Cédric Chépied
2019-08-15 12:29 ` Stephen Berman
2019-08-16 1:03 ` Lars Ingebrigtsen
2019-08-16 6:55 ` Eli Zaretskii
2019-08-17 12:00 ` Eli Zaretskii
2019-08-17 13:50 ` Stephen Berman [this message]
2019-08-17 14:14 ` Eli Zaretskii
2019-08-17 14:40 ` Stephen Berman
2019-08-17 15:09 ` Eli Zaretskii
2019-08-17 15:39 ` Stephen Berman
2019-08-17 15:44 ` Eli Zaretskii
2019-08-17 17:05 ` Stephen Berman
2019-08-17 17:29 ` Eli Zaretskii
2019-08-17 18:11 ` Stephen Berman
2019-08-17 18:22 ` Eli Zaretskii
2019-08-17 18:58 ` Stephen Berman
2019-09-07 9:21 ` Eli Zaretskii
2019-08-15 14:48 ` Eli Zaretskii
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