GNU bug report logs - #48148
27.2; ox-ascii breaks TITLE line wrongly when 2 width char is used

Previous Next

Full log

View this message in rfc822 format

From: Shingo Tanaka <shingo.fg8 <at> gmail.com>
To: 48148 <at> debbugs.gnu.org
Subject: bug#48148: 27.2;  ox-ascii breaks TITLE line wrongly when 2 width char is used
Date: Sun, 02 May 2021 08:52:13 +0900

Hi,

When exporting org-mode document to plain text (either ascii/unicode/utf-8)
with `org-export-dispatch', Emacs translates the document title with
`org-ascii-template--document-title'.  However, when 2 width character is
used, it detects the title line's width wrongly and breaks it even if the
width is not too long.

For example, when the title is "ＡＢＣＤＥＦ" (each character has width of
2), expected title would be like:

                     ━━━━━━━━━━━━━━━
                              ＡＢＣＤＥＦ
                     ━━━━━━━━━━━━━━━

However, the reality is:

                     ━━━━━━━━━━━━━━━
                                 ＡＢＣ
                                 ＤＥＦ
                     ━━━━━━━━━━━━━━━
                     
This is because it uses `length' to detects the width, which only returns the
number of characters (6 in this case) but not the actual width displayed (12
in this case), and it tries to fill the line with that half width.
`string-width' should be used instead.

Here is a potential patch.

--- ox-ascii.el.org	2021-03-26 09:28:44.000000000 +0900
+++ ox-ascii.el	2021-05-02 08:11:57.657347150 +0900
@@ -1033,7 +1033,7 @@
 	     ;; Format TITLE.  It may be filled if it is too wide,
 	     ;; that is wider than the two thirds of the total width.
 	     (title-len (min (apply #'max
-				    (mapcar #'length
+				    (mapcar #'string-width
 					    (org-split-string
 					     (concat title "\n" subtitle) "\n")))
 			     (/ (* 2 text-width) 3)))

---
Shingo Tanaka

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.