bug#60515: 30.0.50; set-justification-center joins lines before centering

bug#60515: 30.0.50; set-justification-center joins lines before centering

[Jean Louis]

When I have following lines in text-mode:

MY FIRST LINE
SECOND LINE
THIRD LINE

and do M-x set-justification-center

I get following unexpected circumstance:

		 MY FIRST LINE SECOND LINE THIRD LINE

Description of the function does not say it is going to join lines. My
expectation is not that it should join lines but center lines only.

Same problem is happening with set-justification-right

And me as user I need to make double lines, do the command on each of
the line, cumbersome work, and then join lines manually to avoid the
above happening.


In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.17.6, Xaw3d scroll bars) of 2022-12-22 built on
 protected.rcdrun.com
Repository revision: e98ab3f458b25812eff1b3a7ce6429caece4c891
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101004
System Description: Parabola GNU/Linux-libre

Configured using:
 'configure --with-x-toolkit=lucid --with-mailutils'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY INOTIFY
PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS
TREE_SITTER WEBP X11 XAW3D XDBE XIM XINPUT2 XPM LUCID ZLIB

Important settings:
  value of $LC_ALL: en_US.UTF-8
  value of $LANG: de_DE.UTF-8
  value of $XMODIFIERS: @im=exwm-xim
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-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:
None found.

Features:
(shadow sort mail-extr emacsbug message mailcap yank-media puny dired
dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068
epg-config gnus-util text-property-search time-date subr-x mm-decode
mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
cl-loaddefs cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils rmc iso-transl tooltip cconv eldoc paren electric
uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel
term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode
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timer select scroll-bar mouse jit-lock font-lock syntax font-core
term/tty-colors frame minibuffer nadvice seq simple cl-generic
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tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
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jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
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 lcms2
dynamic-setting system-font-setting font-render-setting cairo x-toolkit
xinput2 x multi-tty make-network-process emacs)

Memory information:
((conses 16 37782 6794)
 (symbols 48 5194 2)
 (strings 32 14134 1986)
 (string-bytes 1 396991)
 (vectors 16 9489)
 (vector-slots 8 151806 11866)
 (floats 8 34 25)
 (intervals 56 245 0)
 (buffers 984 11))

-- 
Jean

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https://www.fsf.org/campaigns

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bug#60515: 30.0.50; set-justification-center joins lines before centering

[Andreas Schwab]

On Jan 03 2023, Jean Louis wrote:

> When I have following lines in text-mode:
>
> MY FIRST LINE
> SECOND LINE
> THIRD LINE
>
> and do M-x set-justification-center
>
> I get following unexpected circumstance:
>
> 		 MY FIRST LINE SECOND LINE THIRD LINE
>
> Description of the function does not say it is going to join lines. My
> expectation is not that it should join lines but center lines only.
>
> Same problem is happening with set-justification-right

All justification functions work on full paragraphs.

> And me as user I need to make double lines, do the command on each of
> the line, cumbersome work, and then join lines manually to avoid the
> above happening.

If you want to center a single line, use center-line.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

bug#60515: 30.0.50; set-justification-center joins lines before centering

[Eli Zaretskii]

> From: Jean Louis <bugs@gnu.support>
> Date: Tue, 03 Jan 2023 13:56:50 +0300
> 
> 
> When I have following lines in text-mode:
> 
> MY FIRST LINE
> SECOND LINE
> THIRD LINE
> 
> and do M-x set-justification-center
> 
> I get following unexpected circumstance:
> 
> 		 MY FIRST LINE SECOND LINE THIRD LINE
> 
> Description of the function does not say it is going to join lines. My
> expectation is not that it should join lines but center lines only.

The doc string says:

  Make paragraphs in the region centered.

A paragraph in Emacs is (by default) delimited by empty lines.  So the
above is a single paragraph, and the doc string seems to be correct
and accurate.

bug#60515: 30.0.50; set-justification-center joins lines before centering

[Jean Louis]

* Andreas Schwab <schwab@linux-m68k.org> [2023-01-03 16:40]:
> All justification functions work on full paragraphs.
> 
> > And me as user I need to make double lines, do the command on each of
> > the line, cumbersome work, and then join lines manually to avoid the
> > above happening.
> 
> If you want to center a single line, use center-line.

Eh, thanks!

Is there right justify for line?

-- 
Jean

Take action in Free Software Foundation campaigns:
https://www.fsf.org/campaigns

In support of Richard M. Stallman
https://stallmansupport.org/

bug#60515: 30.0.50; set-justification-center joins lines before centering

[Jean Louis]

* Eli Zaretskii <eliz@gnu.org> [2023-01-03 16:48]:
> The doc string says:
> 
>   Make paragraphs in the region centered.
> 
> A paragraph in Emacs is (by default) delimited by empty lines.  So the
> above is a single paragraph, and the doc string seems to be correct
> and accurate.

Thanks.

I must make right-justify for me.

--
Jean

Take action in Free Software Foundation campaigns:
https://www.fsf.org/campaigns

In support of Richard M. Stallman
https://stallmansupport.org/