GNU bug report logs - #79313
30.1.90; Setting mouse-1-click-in-non-selected-windows nil has no effect because target window is selected too soon

Previous Next

To reply to this bug, email your comments to 79313 AT debbugs.gnu.org.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Aaron Zeng <azeng <at> janestreet.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.1.90; Setting mouse-1-click-in-non-selected-windows nil has no
 effect because target window is selected too soon
Date: Mon, 25 Aug 2025 16:22:59 -0400

Setting mouse-1-click-in-non-selected-windows to nil doesn't seem to
have the effect described by the documentation:

> If nil, a Mouse-1 click on a link in a non-selected window performs
> the normal mouse-1 binding, typically selects the window and sets
> point at the click position.

My understanding from this is that, if I see some button in a buffer
whose window is not selected, and click on the button with mouse-1,
the selected window should change but the button should not be
followed.  However, instead I observe the button's link being followed
as if I had clicked mouse-2, or if I had first selected the buffer's
window and then clicked mouse-1.

Reproduction steps:

1. emacs -Q
2. M-: (setopt mouse-1-click-in-non-selected-windows nil)
3. C-x 4 4 C-h C-a (open *About GNU Emacs* buffer in another window)
4. Click the left mouse button on "Authors"

After step 3, I see the AUTHORS file as though I had pressed C-x o to
select the window displaying "*About GNU Emacs*" before clicking on
the button.

I would have expected that after clicking, window merely becomes
selected and point is moved to whichever character in "Authors" I
clicked on.

I did some very cursory investigation, but it seems that by the time
mouse--click-1-maybe-follows-link is called, the "new window" is
already selected, so the following check always evaluates to non-nil,
even if mouse-1-click-in-non-selected-windows is nil:

    (or mouse-1-click-in-non-selected-windows
        (eq (selected-window)
            (posn-window (event-start last-input-event))))

In GNU Emacs 30.1.90 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.15.12, Xaw scroll bars) of 2025-08-14 built on
 igm-qws-u22796a
Repository revision: c7ee7707212c0b7c2892d2d9da039375f624799c
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Rocky Linux 8.10 (Green Obsidian)

Configured using:
 'configure --with-x-toolkit=lucid --without-gpm --without-gconf
 --without-selinux --without-imagemagick --with-modules --with-gif=no
 --with-cairo --with-rsvg --without-compress-install --with-tree-sitter
 --with-native-compilation=aot
 --prefix=/usr/local/home/garnish/raw-emacs/30-20250814_124249'

Configured features:
CAIRO DBUS FREETYPE GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG LIBSYSTEMD
LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP
SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER X11 XDBE XIM
XINPUT2 XPM LUCID ZLIB

Important settings:
  value of $EMACSLOADPATH: /usr/local/home/azeng/workspaces/24833141-bffb-3c99-a9d6-c366d37c4f5e/+share+/app/emacs/elisp:/usr/local/home/azeng/workspaces/24833141-bffb-3c99-a9d6-c366d37c4f5e/+share+/app/emacs/site-lisp:/usr/local/home/azeng/workspaces/24833141-bffb-3c99-a9d6-c366d37c4f5e/+share+/app/emacs/lib/ecaml_plugin/bin:
  value of $LANG: en_US.utf8
  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
  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:
None found.

Features:
(shadow sort mail-extr dabbrev emacsbug message yank-media dired
dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068 epg-config
mm-decode mm-bodies mm-encode mailabbrev gmm-utils mailheader sendmail
noutline outline emacs-authors-mode view textsec uni-scripts
idna-mapping ucs-normalize uni-confusable textsec-check cl-extra gnutls
network-stream url-http mail-parse rfc2231 rfc2047 rfc2045 ietf-drums
url-gw nsm url-cache url-auth format-spec eww xdg url-queue shr
pixel-fill kinsoku url-file svg xml dom puny mm-url gnus nnheader
gnus-util text-property-search mail-utils range mm-util mail-prsvr
browse-url url url-proxy url-privacy url-expand url-methods url-history
url-cookie generate-lisp-file url-domsuf url-util url-parse auth-source
cl-seq eieio eieio-core cl-macs password-cache json map url-vars mailcap
time-date subr-x cus-edit pp cus-start cus-load icons wid-edit cl-print
byte-opt gv bytecomp byte-compile mouse-copy mouse-drag thingatpt
help-fns radix-tree help-mode cl-loaddefs cl-lib 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 touch-screen
tool-bar dnd fontset image fringe tabulated-list replace newcomment
text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow
isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax
font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic
indonesian philippine 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 emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
theme-loaddefs regexp-opt 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
x-toolkit xinput2 x multi-tty move-toolbar make-network-process
native-compile emacs)

Memory information:
((conses 16 294700 30951) (symbols 48 11900 2) (strings 32 59044 2522)
 (string-bytes 1 1429172) (vectors 16 41469)
 (vector-slots 8 579798 44183) (floats 8 95 128) (intervals 56 4218 0)
 (buffers 992 16))

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.