From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
To: Shingo Tanaka <shingo.fg8@gmail.com>
Cc: 48149@debbugs.gnu.org
Subject: bug#48149: 27.2; Wrong underline width when the line char has a width of 2
Date: Sun, 02 May 2021 18:08:50 +0200 [thread overview]
Message-ID: <87a6pd86el.fsf@nicolasgoaziou.fr> (raw)
In-Reply-To: <87fsz62b1w.wl-shingo.fg8@gmail.com> (Shingo Tanaka's message of "Sun, 02 May 2021 10:12:43 +0900")
Hello,
Shingo Tanaka <shingo.fg8@gmail.com> writes:
> When exporting org-mode document to plain text (either ascii/unicode/utf-8)
> with `org-export-dispatch', Emacs inserts lines under headlines, inline
> tasks, table rows and titles of the document, TOC, list of listings, list of
> tables and footnotes. The problem is it inserts too long (double width) line
> when the line character has a width of 2.
>
> Those lines are made of 3 types of characters below (in ox-ascii.el):
> 1) org-ascii-underline
> 2) (if (eq (plist-get info :ascii-charset) 'utf-8) ?─ ?_)
> 3) (if utf8p ?━ ?_)
>
> In case of 1), it correctly takes account of the case in which the character
> has a width of 2 in `org-ascii--build-title', by dividing the line width by
> `(char-width under-char)' (line 700-701), maybe because the character is user
> configurable and its width in unknown. However, in case of 2) and
> 3), maybe because the characters is embedded in the code, it looks like only
> considering the character always has a width of 1. But the reality is
> character ?─ or ?━ can have a width of 2 in the screen displayed with some
> fonts (ex. "Noto Sans Mono CJK JP"), and in that case the line width gets
> doubled of the expected width.
>
> Attached one is a potential patch. The basic concepts are:
>
> a) Do the same in case of 2) and 3) as in case of 1)
> (dividing the line width by `(char-width under-char)',
> assuming `char-width-table' is correctly set)
>
> b) Prefer the longer line width if the width is odd, even in case of 1)
> (adding `(1- (char-width under-char))' to dividend,
> just because it should be more beautiful ;-) )
Thank you. This looks good. I cannot apply it on "maint" branch,
however. Also, a proper commit message would be nice. Could you send an
updated patch?
Moreover, have you signed FSF papers already? This is above limit for
tiny changes.
Regards,
--
Nicolas Goaziou
next prev parent reply other threads:[~2021-05-02 16:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-02 1:12 bug#48149: 27.2; Wrong underline width when the line char has a width of 2 Shingo Tanaka
2021-05-02 7:17 ` Eli Zaretskii
2021-05-02 7:17 ` Eli Zaretskii
2021-05-02 8:36 ` Rudolf Schlatte
2021-05-02 9:16 ` Eli Zaretskii
2021-05-02 16:08 ` Nicolas Goaziou [this message]
2021-05-02 16:23 ` Eli Zaretskii
2021-05-02 16:23 ` Eli Zaretskii
2021-05-09 13:57 ` Shingo Tanaka
2021-05-02 16:08 ` Nicolas Goaziou
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