From: Eli Zaretskii <eliz@gnu.org>
To: Dmitry Gutov <dmitry@gutov.dev>
Cc: 64420@debbugs.gnu.org
Subject: bug#64420: string-width of … is 2 in CJK environments
Date: Sun, 02 Jul 2023 16:10:03 +0300 [thread overview]
Message-ID: <83cz1ao3x0.fsf@gnu.org> (raw)
In-Reply-To: <961e5083-ccf3-9d39-175d-5c5957130d50@gutov.dev> (message from Dmitry Gutov on Sun, 2 Jul 2023 15:57:07 +0300)
> Date: Sun, 2 Jul 2023 15:57:07 +0300
> From: Dmitry Gutov <dmitry@gutov.dev>
>
> Hi! This was reported to company-mode
> (https://github.com/company-mode/company-mode/issues/1388), as a
> scenario that makes the overlay-based completion popup misrender because
> the columns are not computed right when that char is present.
>
> To repro:
>
> (set-language-environment "Chinese-BIG5")
> (string-width "…") ;; => 2
>
> In the default language environment its width is reported to be 1.
>
> This doesn't seem to make sense because it's rendered one column wide
> either way.
On GUI frames Lisp programs that need to know the actual width of some
string should use string-pixel-width, not string-width. The latter is
basically only for TTY frames.
(progn
(set-language-environment "Chinese-BIG5")
(ceiling (/ (string-pixel-width "…")
(float (default-font-width))))) ;; => 1
next prev parent reply other threads:[~2023-07-02 13:10 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-02 12:57 bug#64420: string-width of … is 2 in CJK environments Dmitry Gutov
2023-07-02 13:10 ` Eli Zaretskii [this message]
2023-07-02 13:20 ` Dmitry Gutov
2023-07-02 13:43 ` Eli Zaretskii
2023-07-07 2:13 ` Dmitry Gutov
2023-07-07 6:29 ` Eli Zaretskii
2023-07-11 2:13 ` Dmitry Gutov
2023-07-11 11:41 ` Eli Zaretskii
2023-07-11 2:23 ` Dmitry Gutov
2023-07-11 11:48 ` Eli Zaretskii
2023-07-11 18:13 ` Dmitry Gutov
2023-07-11 18:45 ` Eli Zaretskii
2023-07-12 1:17 ` Dmitry Gutov
2023-07-12 19:54 ` Dmitry Gutov
2023-07-12 21:11 ` Yuan Fu
2023-07-13 5:23 ` Eli Zaretskii
2023-07-27 1:52 ` Dmitry Gutov
2023-07-14 4:45 ` SUNG TAE KIM
2023-07-14 6:58 ` Eli Zaretskii
2023-07-16 11:51 ` Eli Zaretskii
2023-07-14 9:21 ` SUNG TAE KIM
2023-07-14 11:04 ` Eli Zaretskii
2023-07-14 20:11 ` Yuan Fu
2023-07-16 16:59 ` SUNG TAE KIM
2023-07-16 17:15 ` Eli Zaretskii
2023-08-05 15:01 ` Eli Zaretskii
2023-08-10 21:58 ` Yuan Fu
2023-08-11 5:53 ` Eli Zaretskii
2023-08-11 18:07 ` Yuan Fu
2023-08-11 18:36 ` Eli Zaretskii
2023-08-12 20:18 ` Yuan Fu
2023-08-11 22:34 ` Dmitry Gutov
2023-08-13 0:22 ` Dmitry Gutov
2023-08-13 5:24 ` Eli Zaretskii
2023-08-13 10:48 ` Dmitry Gutov
2023-08-13 12:01 ` Eli Zaretskii
2023-08-13 12:53 ` Dmitry Gutov
2023-08-11 23:52 ` Dmitry Gutov
2023-08-12 5:50 ` Eli Zaretskii
2023-08-12 16:40 ` Dmitry Gutov
2023-08-12 17:09 ` Eli Zaretskii
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