From: Eshel Yaron via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: 74091@debbugs.gnu.org
Subject: bug#74091: 31.0.50; string-pixel-width in mode line disables region
Date: Tue, 29 Oct 2024 18:27:05 +0100 [thread overview]
Message-ID: <m1froen7km.fsf@macbookpro.home> (raw)
The new implementation of string-pixel-width has some unexpected effect
when it is called from mode-line-format, as happens for example when
mode-line-format-right-align occurs in mode-line-format:
1. emacs -Q
2. (setq-default mode-line-format
'("" (:eval (progn (string-pixel-width "foo") nil))))
3. C-x C-f /path/to/emacs/lisp/subr.el
4. C-SPC
5. C-n
At this point the region is expected to be active since we activated it
in step 4. But in step 5 the mode line is updated, which calls
string-pixel-width, which in turn unexpectedly disables the region.
I'm not really sure why this happens... Also, if I now trace
string-pixel-width, then it no longer disables the region and everything
starts working as expected.
Thanks,
Eshel
next reply other threads:[~2024-10-29 17:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-29 17:27 Eshel Yaron via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2024-10-30 14:59 ` bug#74091: 31.0.50; string-pixel-width in mode line disables region Eli Zaretskii
2024-10-30 15:26 ` Eshel Yaron via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-30 16:01 ` Eli Zaretskii
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