bug#42889: 28.0.50; make-pointer-invisible t should work also for navigation commands

[Stefan Kangas]

Eli Zaretskii <eliz@gnu.org> writes:

>> Please consider the following feature request:
>>
>> 0. emacs -Q
>> 1. (setq make-pointer-invisible t)
>> 2. M-x customize-group RET RET
>> 3. Move mouse pointer over e.g. "Editing" to highlight it
>> 4. C-n C-p C-f C-b
>>
>> Result: "Editing" is still highlighted.
>>
>> Desired result: "Editing" is _not_ highlighted.
>
> I think it should be very easy to add such a feature, and I'm willing
> to help by advice.  Want to give it a try?

Sure, why not?  Thanks for offering to help.

I had a first naive crack at it, and ended up with the attached.  It
covers the commands that often irks me, but it might need some more
adjusting.  I considered exposing this to Lisp, but it seemed better to
do this in the low-level primitives, maybe?

I did find one problem, which is that the mouse cursor disappears when I
scroll using the mouse wheel.  I tried fixing it using a simple
let-binding, but that didn't work for some reason I don't yet understand
(see patch).

Also, is this behaviour suitable as a default or should it be optional?

Best regards,
Stefan Kangas

make-invisible.diff
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