GNU bug report logs - #48639
28.0.50; tabulated-list-mode: columns move if previous entry was too long

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Message #36 received at control <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Shingo Tanaka <shingo.fg8 <at> gmail.com>,
 Stefan Kangas <stefankangas <at> gmail.com>
Cc: 53133 <at> debbugs.gnu.org
Subject: Re: bug#53133: 28.0.90; tabulated-list-sort doesn't work as expected
Date: Sun, 09 Jan 2022 12:44:15 +0200

unarchive 48639
reopen 48639
thanks

> Date: Sun, 09 Jan 2022 11:03:27 +0900
> From: Shingo Tanaka <shingo.fg8 <at> gmail.com>
> 
> Here is how to reproduce:
> 1. Open Emacs from terminal with `emacs --no-init-file'
> 2. Type M-x list-buffers
> 3. Type C-x o (go to Buffer Menu)
> 4. Type C-M-Right 5 times to move on to "Fundamental" in "Mode" column
> 5. Type S 2 times or more to toggle sorting order
> 6. You will be able to see that "Size" column is selected as the sorting column
>    unexpectedly
> 
> Looks like below change from 28.0.50 is releated to this issue, because it
> disappears when I just rewind this change.
> 
> --- tabulated-list.el.org	2022-01-06 22:32:13.936852142 +0900
> +++ tabulated-list.el	2022-01-07 15:15:42.000000000 +0900
> @@ -574,7 +581,8 @@
>        (when not-last-col
>          (when (> pad-right 0) (insert (make-string pad-right ?\s)))
>          (insert (propertize
> -                 (make-string (- width (min width label-width)) ?\s)
> +                 ;; We need at least one space to align correctly.
> +                 (make-string (- width (min 1 width label-width)) ?\s)
>                   'display `(space :align-to ,next-x))))
>        (put-text-property opoint (point) 'tabulated-list-column-name name)
>        next-x)))

You are right.

Stefan, I reverted that change and I'm reopening bug#48639.  This
problem is a much more serious regression than what happens sometimes
when text-size is scaled.  We will need to find another fix for that
bug, most probably in one of the hooks used by tabulated-list.el, by
adding the display property only when actually needed.

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