GNU bug report logs - #10978
`calendar-string-spread' loses with double-width characters

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Štěpán Němec
 <stepnem <at> gmail.com>
Subject: bug#10978: closed (Re: bug#10978: `calendar-string-spread' loses
 with double-width characters)
Date: Fri, 16 Mar 2012 01:43:03 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#10978: `calendar-string-spread' loses with double-width characters

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 10978 <at> debbugs.gnu.org.

-- 
10978: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10978
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Glenn Morris <rgm <at> gnu.org>
To: 10978-done <at> debbugs.gnu.org
Subject: Re: bug#10978: `calendar-string-spread' loses with double-width
	characters
Date: Thu, 15 Mar 2012 21:12:06 -0400

Version: 24.0.95

> Eli Zaretskii wrote:
>
>> But it looks like calendar-insert-at-column and calendar-string-spread
>> also need similar changes.

Both hopefully fixed.

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From: Štěpán Němec <stepnem <at> gmail.com>
To: bug-gnu-emacs <bug-gnu-emacs <at> gnu.org>
Subject: `calendar-string-spread' loses with double-width characters
Date: Fri, 09 Mar 2012 12:57:30 +0100

The algorithm used obviously works using `length', but for every
double-width character the resulting string is one char too long when
actually displayed, defeating its purpose when formatting the calendar
mode line (`calendar-update-mode-line' et al.).

Ex.:

(calendar-string-spread '("a" "b" "c") ?\s 10)
;=> "a   b    c" ; OK

(calendar-string-spread '("矢" "b" "c") ?\s 10)
;=> "矢   b    c" ; not OK

-- 
Štěpán

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