bug#23854: 25.0.95; vertical completions-format layout clobbered

bug#23854: 25.0.95; vertical completions-format layout clobbered

[Michael Heerdegen]

Hello,

when using completions-format -> vertical, and candidates are of quite
different lengths, the *Completions* display is often clobbered.

There are candidates put into a second columns although there is not
enough horizontal space.

And the last candidates are sometimes aligned to the nth column,
while the first column is empty.

Example for two columns:


|a   a candidat|   ;; doesn't fit in column
|xy  foo       |
|gnu image     |
|    bar       |   ;; strange
|    emacs     |



Thanks,

Michael.



In GNU Emacs 25.0.95.1 (x86_64-pc-linux-gnu, GTK+ Version 3.20.6)
 of 2016-06-21 built on drachen
Repository revision: 6cdd8f7153b553c6dc02be47e04a2e75117b6fe4
Windowing system distributor 'The X.Org Foundation', version 11.0.11803000
System Description:	Debian GNU/Linux testing (stretch)

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS NOTIFY
LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LC_ALL: de_DE.utf8
  value of $LC_COLLATE: C
  value of $LC_TIME: C
  value of $LANG: de_DE.utf8
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

bug#23854: 25.0.95; vertical completions-format layout clobbered

[Lars Ingebrigtsen]

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Michael Heerdegen <michael_heerdegen@web.de> writes:

> when using completions-format -> vertical, and candidates are of quite
> different lengths, the *Completions* display is often clobbered.
>
> There are candidates put into a second columns although there is not
> enough horizontal space.
>
> And the last candidates are sometimes aligned to the nth column,
> while the first column is empty.
>
> Example for two columns:
>
> |a   a candidat|   ;; doesn't fit in column
> |xy  foo       |
> |gnu image     |
> |    bar       |   ;; strange
> |    emacs     |

This bug is still present in Emacs 28.  Way to reproduce it:

/src/emacs -geometry -0+0 -Q -eval "(setq completions-format 'vertical)"
M-x c<TAB><TAB><TAB>


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-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no