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From: Ihor Radchenko <yantar92@gmail.com>
To: 57693@debbugs.gnu.org
Subject: bug#57693: 29.0.50; Is there a more reliable version of `char-displayable-p'?
Date: Fri, 09 Sep 2022 21:25:35 +0800	[thread overview]
Message-ID: <87v8pw1xyo.fsf@localhost> (raw)

Hello,

In Org, we have recently had a need to check if a Unicode character can
be displayed in buffer.

We used the following:
(...
  (if (and (display-graphic-p)
           (char-displayable-p ?⭠)
           (char-displayable-p ?─))
      "⭠ now ───────────────────────────────────────────────"
    "now - - - - - - - - - - - - - - - - - - - - - - - - -")
...)

However, char-displayable-p returned false-positive for one user:
https://list.orgmode.org/orgmode/87mtddhprr.fsf@localhost/ 

False-positives are indeed not unexpected in char-displayable-p; just as
its docstring warns. However, I am now wondering if there is some more
accurate way to know if a character can be actually displayed on buffer
or not.

-- 
Ihor Radchenko,
Org mode contributor,
Learn more about Org mode at https://orgmode.org/.
Support Org development at https://liberapay.com/org-mode,
or support my work at https://liberapay.com/yantar92





             reply	other threads:[~2022-09-09 13:25 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-09 13:25 Ihor Radchenko [this message]
2022-09-09 13:38 ` bug#57693: 29.0.50; Is there a more reliable version of `char-displayable-p'? Eli Zaretskii
2022-09-09 22:25   ` Stefan Kangas
2022-09-10  6:01     ` Eli Zaretskii
2022-09-10  6:06       ` Ihor Radchenko
2022-09-10  6:35         ` Eli Zaretskii
2022-09-10  6:44           ` Ihor Radchenko
2022-09-10  4:48   ` Ihor Radchenko
2022-09-10  6:24     ` Eli Zaretskii
2022-09-10  6:37       ` Ihor Radchenko
2022-09-10  7:56         ` Eli Zaretskii
2022-09-10  8:17           ` Ihor Radchenko
2022-09-10  8:42             ` Eli Zaretskii
2022-09-11  9:31               ` Ihor Radchenko
2022-09-11  9:43                 ` Eli Zaretskii
2022-09-11 10:07                   ` Eli Zaretskii
2022-09-12  5:46                     ` Ihor Radchenko
2022-09-12 11:15                       ` Eli Zaretskii
2022-09-13  1:44                         ` Ihor Radchenko
2022-09-13 11:19                           ` Eli Zaretskii
2022-09-14  1:52                             ` Ihor Radchenko
2022-09-14  2:43                               ` Eli Zaretskii
2023-02-17 19:18                       ` Stefan Kangas
2023-02-17 19:29                         ` Eli Zaretskii
2023-02-17 22:31                           ` Stefan Kangas
2023-02-18  6:56                             ` Eli Zaretskii
2023-02-18  9:00                               ` Stefan Kangas
2023-02-18  9:18                                 ` Eli Zaretskii
2023-02-18 11:32                                   ` Ihor Radchenko
2023-02-18 11:56                                     ` Eli Zaretskii
2023-02-19 11:31                                       ` Ihor Radchenko
2023-02-19 11:55                                         ` Eli Zaretskii
2023-02-19 12:08                                           ` Ihor Radchenko
2023-02-19 12:23                                             ` Eli Zaretskii
2023-02-19 14:19                                               ` Ihor Radchenko
2023-02-19 15:02                                                 ` Eli Zaretskii
2023-02-18 11:35                               ` Ihor Radchenko
2023-02-18 12:00                                 ` Eli Zaretskii
2022-09-12  5:24                   ` Ihor Radchenko
2022-09-09 13:46 ` Robert Pluim
2022-09-09 22:25   ` Stefan Kangas
2022-09-10  4:56     ` Ihor Radchenko
2022-09-10  6:02     ` Eli Zaretskii
2022-09-10  4:53   ` Ihor Radchenko

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