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* bug#44448: 27.1; Strange inteference between timer, modeline/header-line and buffer position in window
@ 2020-11-04 16:48 Amai Kinono
  2020-11-04 20:12 ` Eli Zaretskii
                   ` (3 more replies)
  0 siblings, 4 replies; 32+ messages in thread
From: Amai Kinono @ 2020-11-04 16:48 UTC (permalink / raw)
  To: 44448

[-- Attachment #1: Type: text/plain, Size: 4980 bytes --]

When:

- 2 windows open the same file
- There's a timer dealing with modeline or header-line format

Then pressing `C-g` sometimes scrolls the buffer in this window to the
position in the other window.

Here's a recipe for reproduce:

- `$ emacs -Q`

- Eval this:
  ```
  (run-with-timer 0 0.1 (lambda () (setq mode-line-format "hi")))
  ```

- `M-x delete-other-windows` so we have only one window.

- `C-x C-f` to open a file. I use
  <https://github.com/lsof-org/lsof/blob/master/main.c> when testing,
  but any file that's long enough should work.

- `M-x split-window-horizontally`, so we have 2 windows viewing the same
  file. For some reason, splitting vertically doesn't trigger the
  problem.

- Scroll one window down to somethere.

- Hold `C-g` or press it repeatedly and quickly, then the window will go
  to the same position in file as the other window.

You can do the same with `header-line-format`, it also has the problem.
Using `run-with-idle-timer` instead seems doesn't have the problem.

See also <https://github.com/kiennq/emacs-mini-modeline/issues/45> where
I report the same problem. I believe another package that's influenced
by this is <https://github.com/purcell/mode-line-bell>.

--- Info generated by `report-emacs-bug` ---

In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.22,
cairo version 1.17.3)
 of 2020-08-29 built on juergen
Windowing system distributor 'The X.Org Foundation', version 11.0.12009000
System Description: Manjaro Linux

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Mark set
[nil 24482 55348 93490 0.1 (closure (t) nil (setq mode-line-format "hi"))
nil nil 920000]
You can run the command ‘split-window-horizontally’ with M-x sp-h RET
Quit [22 times]
Quit
Configured using:
 'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=gtk3 --with-xft --with-wide-int
 --with-modules --with-cairo --with-harfbuzz 'CFLAGS=-march=x86-64
 -mtune=generic -O2 -pipe -fno-plt' CPPFLAGS=-D_FORTIFY_SOURCE=2
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD JSON
PDUMPER LCMS2 GMP

Important settings:
  value of $LC_MONETARY: zh_CN.UTF-8
  value of $LC_NUMERIC: zh_CN.UTF-8
  value of $LC_TIME: zh_CN.UTF-8
  value of $LANG: zh_CN.utf8
  value of $XMODIFIERS: @im=fcitx
  locale-coding-system: utf-8-unix

Major mode: C/*l

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-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
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
format-spec rfc822 mml mml-sec password-cache epa derived epg epg-config
gnus-util rmail rmail-loaddefs text-property-search time-date subr-x seq
byte-opt gv bytecomp byte-compile cconv mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils vc-git diff-mode
easy-mmode cc-mode cc-fonts easymenu cc-guess cc-menus cc-cmds cc-styles
cc-align cc-engine cc-vars cc-defs cl-loaddefs cl-lib china-util tooltip
eldoc electric uniquify ediff-hook vc-hooks lisp-float-type 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 elisp-mode
lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch
timer select scroll-bar mouse jit-lock font-lock syntax facemenu
font-core term/tty-colors frame minibuffer cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
cairo move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 75931 7519)
 (symbols 48 8992 1)
 (strings 32 23346 1733)
 (string-bytes 1 858985)
 (vectors 16 14047)
 (vector-slots 8 224399 9036)
 (floats 8 27 38)
 (intervals 56 1440 1)
 (buffers 1000 12))

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^ permalink raw reply	[flat|nested] 32+ messages in thread

end of thread, other threads:[~2021-12-04 16:07 UTC | newest]

Thread overview: 32+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-11-04 16:48 bug#44448: 27.1; Strange inteference between timer, modeline/header-line and buffer position in window Amai Kinono
2020-11-04 20:12 ` Eli Zaretskii
2020-12-07 16:45   ` Lars Ingebrigtsen
2021-02-05 13:42 ` bug#44448: Amai Kinono
2021-02-05 13:44   ` bug#44448: Lars Ingebrigtsen
2021-08-11  5:49 ` bug#44448: Amai Kinono
2021-08-11 11:20   ` bug#44448: Lars Ingebrigtsen
     [not found]     ` <CAPu3fz0cn0NjjSdZ34KYCw0ZweaR3tBCaRTxwe3fccTQL=Gq5g@mail.gmail.com>
2021-08-11 12:18       ` bug#44448: Fwd: bug#44448: Amai Kinono
2021-08-11 11:43   ` bug#44448: Eli Zaretskii
     [not found]     ` <CAPu3fz1HwaXCztR05vjXO19_6oWXOPgG7LKV2t7isV6J9KMMCQ@mail.gmail.com>
2021-08-11 12:18       ` bug#44448: Fwd: bug#44448: Amai Kinono
2021-08-12 12:44         ` Eli Zaretskii
2021-08-12 14:07           ` Eli Zaretskii
     [not found]           ` <CAPu3fz1YHXqAdN+0B-45J+geEwC70QTuAZLe1vuwmq+gTq64NA@mail.gmail.com>
2021-08-13  9:49             ` bug#44448: Fwd: " Amai Kinono
2021-08-14  9:25             ` Eli Zaretskii
2021-08-15 11:21               ` Eli Zaretskii
2021-08-15 12:12                 ` Amai Kinono
2021-08-15 14:15                   ` Eli Zaretskii
2021-08-15 18:10                     ` Amai Kinono
2021-08-15 18:29                       ` Eli Zaretskii
2021-08-16 18:28                         ` Amai Kinono
2021-08-16 19:09                           ` Eli Zaretskii
2021-08-17 18:09                             ` Amai Kinono
2021-08-17 18:31                               ` Eli Zaretskii
2021-08-18 12:05                                 ` Amai Kinono
2021-08-18 13:16                                   ` Eli Zaretskii
2021-08-18 14:00                                     ` Amai Kinono
2021-08-18 15:47                                       ` Eli Zaretskii
2021-12-04  6:13                                         ` Amai Kinono
2021-12-04  8:38                                           ` Eli Zaretskii
2021-12-04 11:42                                             ` Amai Kinono
2021-12-04 16:07                                               ` Eli Zaretskii
2021-08-11 12:22 ` bug#44448: [Amai Kinono] bug#44448: Lars Ingebrigtsen

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