GNU bug report logs - #76734
31.0.50; The line numbers take more space than they need

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#76734: closed (31.0.50; The line numbers take more space than
 they need)
Date: Tue, 04 Mar 2025 21:37:01 +0000

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Your message dated Tue, 4 Mar 2025 21:36:21 +0000
with message-id <CADwFkm=xBFryDd4fr+V6_xvjyfHOTBR2BC014nx+SGp6RvKmTA <at> mail.gmail.com>
and subject line Re: bug#76734: 31.0.50; The line numbers take more space than they need
has caused the debbugs.gnu.org bug report #76734,
regarding 31.0.50; The line numbers take more space than they need
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
76734: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=76734
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: the_wurfkreuz <the_wurfkreuz <at> proton.me>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: 31.0.50; The line numbers take more space than they need
Date: Tue, 04 Mar 2025 06:31:00 +0000

[Message part 3 (text/plain, inline)]

When using the line-numbers mode, the line numbers start to take an
additional space from a buffer way before the line count reaches 3
digit numbers.

Steps to reproduce:

1. Evaluate:

(global-display-line-numbers-mode 1)
(setq display-line-numbers 'visual
display-line-numbers-type 'relative)

(fringe-mode '(1 . 1))

2. Then create new lines in the same buffer using the newline
command. In my case i get an additional space on a 38th line already.

In GNU Emacs 31.0.50 (build 3, x86_64-pc-linux-gnu, GTK+ Version
3.24.43, cairo version 1.18.0) of 2025-02-19 built on ub-void
Repository revision: b568ff418ce7147c27d7f82fe4a8eef325b9de2c
Repository branch: HEAD
System Description: Void Linux

Configured using:
'configure --with-native-compilation=aot --with-tree-sitter --with-gif
--with-png --with-jpeg --with-rsvg --with-tiff --with-imagemagick
--with-pgtk --with-mailutils CC=/usr/bin/gcc CXX=/usr/bin/gcc'

Configured features:
CAIRO DBUS FREETYPE GLIB GMP GNUTLS GSETTINGS HARFBUZZ IMAGEMAGICK JPEG
LCMS2 LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK PNG RSVG
SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP
XIM GTK3 ZLIB

Important settings:
value of $LC_COLLATE: C
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix

Major mode: ELisp/l

Minor modes in effect:
windmove-mode: t
savehist-mode: t
meow-global-mode: t
meow-mode: t
meow-normal-mode: t
meow-esc-mode: t
envrc-global-mode: t
envrc-mode: t
buffer-terminator-mode: t
global-git-commit-mode: t
magit-auto-revert-mode: t
marginalia-mode: t
vertico-mode: t
corfu-popupinfo-mode: t
corfu-history-mode: t
corfu-echo-mode: t
global-corfu-mode: t
corfu-mode: t
which-key-mode: t
undo-fu-session-global-mode: t
undo-fu-session-mode: t
global-treesit-auto-mode: t
global-auto-revert-mode: t
save-place-mode: t
electric-pair-mode: t
recentf-mode: t
global-display-line-numbers-mode: t
display-line-numbers-mode: t
override-global-mode: t
tooltip-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tab-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
minibuffer-regexp-mode: t
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t

Load-path shadows:
/home/wurfkreuz/.emacs.d/elpa/transient-20250108.1351/transient hides /usr/local/share/emacs/31.0.50/lisp/transient

Features:
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multi-isearch pulse windmove cus-start help-fns radix-tree tramp-cmds
em-unix em-term term disp-table ehelp em-script em-prompt em-pred em-ls
em-hist em-glob em-extpipe em-cmpl em-dirs em-basic em-banner em-alias
em-elecslash esh-mode esh-var dired-aux org-appear image-file
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exif ol-bibtex bibtex ol-bbdb ol-w3m ol-doi org-link-doi python vc-git
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dockerfile-mode-autoloads embark-consult-autoloads consult-autoloads
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goto-chg-autoloads haskell-mode-autoloads hydra-autoloads
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dash-autoloads hcl-mode-autoloads transient-autoloads
transpose-frame-autoloads treesit-auto-autoloads undo-fu-autoloads
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with-editor-autoloads yaml-mode-autoloads zig-ts-mode-autoloads package
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url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs icons
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theme-loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads dbusbind inotify
dynamic-setting system-font-setting font-render-setting cairo gtk pgtk
lcms2 multi-tty move-toolbar make-network-process tty-child-frames
native-compile emacs)

Memory information:
((conses 16 1020202 193596) (symbols 48 53352 11) (strings 32 257404 62454)
(string-bytes 1 8166769) (vectors 16 99053) (vector-slots 8 1933532 133075)
(floats 8 827 2083) (intervals 56 12099 2590) (buffers 992 28))

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From: Stefan Kangas <stefankangas <at> gmail.com>
To: the_wurfkreuz <the_wurfkreuz <at> proton.me>, Eli Zaretskii <eliz <at> gnu.org>
Cc: 76734-done <at> debbugs.gnu.org
Subject: Re: bug#76734: 31.0.50;
 The line numbers take more space than they need
Date: Tue, 4 Mar 2025 21:36:21 +0000

the_wurfkreuz via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs <at> gnu.org> writes:

> Sent with Proton Mail secure email.
>
> On Tuesday, March 4th, 2025 at 2:55 PM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>
>> tags 76734 notabug
>> thanks
>>
>> > Date: Tue, 04 Mar 2025 06:31:00 +0000
>> > From: the_wurfkreuz via "Bug reports for GNU Emacs,
>> > the Swiss army knife of text editors" bug-gnu-emacs <at> gnu.org
>> >
>> > When using the line-numbers mode, the line numbers start to take an
>> > additional space from a buffer way before the line count reaches 3
>> > digit numbers.
>> >
>> > Steps to reproduce:
>> >
>> > 1. Evaluate:
>> >
>> > (global-display-line-numbers-mode 1)
>> > (setq display-line-numbers 'visual
>> > display-line-numbers-type 'relative)
>> >
>> > (fringe-mode '(1 . 1))
>> >
>> > 2. Then create new lines in the same buffer using the newline
>> > command. In my case i get an additional space on a 38th line already.
>>
>>
>> This is by design. Emacs cannot know how many lines will actually be
>> shown in the window before it actually shows them all. By contrast,
>> it needs to decide how many columns to allocate for line numbers
>> before it displays even a single line, to avoid the annoying
>> horizontal movement of text as much as possible. So it sometimes errs
>> on the safe side (recall that some lines could be smaller than others
>> due to different fonts), to avoid the need to display the window
>> twice, which would significantly punish performance in this mode.
>>
>> Why is that a problem?
>
> If it's done so intentionally, then there is no inherent problem.

Yes, I think it's intentional here, sorry.  Thanks for the bug report,
nevertheless.

I guess the only thing left to do here is to close the bug; I'm doing
that with this message.

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