GNU bug report logs - #47712
27.1; Provide `string-display-width` function, which takes properties into account, `substring-width`

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Package: emacs;

Reported by: Daniel Mendler <mail <at> daniel-mendler.de>

Date: Sun, 11 Apr 2021 21:17:02 UTC

Severity: normal

Found in version 27.1

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #71 received at 47712 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: martin rudalics <rudalics <at> gmx.at>
Cc: mail <at> daniel-mendler.de, 47712 <at> debbugs.gnu.org
Subject: Re: bug#47712: 27.1; Provide `string-display-width` function, which
 takes properties into account, `substring-width`
Date: Tue, 13 Apr 2021 15:23:22 +0300

> Cc: 47712 <at> debbugs.gnu.org
> From: martin rudalics <rudalics <at> gmx.at>
> Date: Tue, 13 Apr 2021 09:06:06 +0200
> 
> (defun string-pixel-width (string)
>    (let ((buffer (get-buffer-create "*foo*"))
> 	(old-buffer (window-buffer)))
>      (with-current-buffer buffer
>        (erase-buffer)
>        (insert string)
>        (set-window-buffer (selected-window) buffer)
>        (prog1
> 	  (window-text-pixel-size nil (point-min) (point-max))
> 	(set-window-buffer (selected-window) old-buffer)))))

Thanks.  This produces correct results, and takes 35-37 usec per call
here.
This bug report was last modified 4 years and 38 days ago.

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