GNU bug report logs - #76394
mouse-face property not working in tab-bar

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From: Ship Mints <shipmints <at> gmail.com>
To: Juri Linkov <juri <at> linkov.net>
Cc: 76394 <at> debbugs.gnu.org
Subject: bug#76394: mouse-face property not working in tab-bar
Date: Thu, 27 Feb 2025 14:14:33 -0500

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I assumed that once the xdisp changes were deemed acceptable, we'd suggest
a tab bar highlight face. That would be in lisp.

On Thu, Feb 27, 2025 at 14:13 Ship Mints <shipmints <at> gmail.com> wrote:

> My patch is all in xdisp.c so I don't follow.
>
> On Thu, Feb 27, 2025 at 14:07 Juri Linkov <juri <at> linkov.net> wrote:
>
>> > I assumed you knew how to use tab-bar :) I rarely use emojis but this
>> one I
>> > couldn't help myself.
>> >
>> > It also works with mouse-face on any spans of glyphs embedded in the
>> name
>> > string.
>>
>> But this doesn't look normal, don't you think so?
>> tab-bar-mode enabled, then later disabled,
>> code evaluated, enabled again, and no effect.
>> Something is wrong here?  There are no other settings
>> that behave that way.
>>
>> >     > (defun my/tab-bar-tab-name-format-function (tab i)
>> >     >   (propertize
>> >     >    (tab-bar-tab-name-format-default tab i)
>> >     >    'mouse-face '(:inverse-video t))) ; or a named face
>> >     > (setopt tab-bar-tab-name-format-function
>> >     > #'my/tab-bar-tab-name-format-function)
>> >     >
>> >     > And move the mouse over the tab. It should invert. It does for me.
>> >
>> >     Thanks, now it works.  The requirement is that the tab-bar-mode
>> >     should be disabled before evaluating the above code.  Otherwise,
>> >     with already enabled tab-bar-mode it has no effect.
>>
>

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