GNU bug report logs -
#78218
30.1; mouse-highlight variable does not work on macOS
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> auth-sender: rmorelli <at> q.com
> Date: Fri, 2 May 2025 12:19:34 -0600
> From: Robert Morelli <morelli <at> flux.utah.edu>
>
> According to the documentation for mouse-highlight, "If the value is an
> integer, highlighting is shown only after moving the mouse, while
> keyboard input turns off the highlight even when the mouse is over the
> clickable text." This is not working, even if Emacs is started with
> the --no-init option. I've checked with several independent builds on
> macOS, versions 29 up to 30.1. I'm running macOS Sequoia 15.3.2.
>
> Note that the problem is especially distracting in situations where a
> "vertical list" is invoked by a keyboard action but the mouse cursor
> happens to be over an item of the list, in which case that item is
>
> highlighted, but with no functional significance.
>
> The specific context where this became problematic for me, is using
> Vertico, and other similar packages, but the problem manifests in plain
> Emacs with no third party packages installed.
>
> It took me some time to recognize where the highlighting was coming
> from, even though I'm an experienced Emacs user, because I normally use
> "mouse avoidance" features of Emacs, so generally don't expect the
> mouse, which I'm not often using, to affect how I interact with Emacs.
> Me belief is that this issue would create even more confusion for a new
> Emacs user.
This seems to be macOS specific (works for me on MS-Windows, and I see
code for supporting this in xterm.c and pgtkterm.c). I've added to
this conversation people who might be able to debug and fix this.
Btw, do you see this in a GUI session or in a -nw session (or in
both)?
This bug report was last modified 47 days ago.
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