https://bugs.freedesktop.org/show_bug.cgi?id=104867
--- Comment #2 from Carlos Garnacho Parro <[email protected]> ---
(In reply to Peter Hutterer from comment #1)
> Just a few notes: the TOUCH capability is assigned to any touch device, even
> single-touch touchscreens. Whether it's single touch or multi-touch is not
> exposed, but we have device->mt.slots_len with the number of slots
> internally.
>
> There is no capability API outside of that, the closest we have for querying
> specific devices is the libinput_device_<type>_has* set of functions to
> check for buttons or keys. So libinput_device_touch_get_num_touches() would
> fit, and so would libinput_device_touch_has_multitouch() for a basic boolean
> check.
>
> CC-ing carlos in case he has any thoughts on using it in mutter.
Not specifically tbh. All multitouch functionality is already redundant so we
don't have any place where we want to act differently if n_touches==1.
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