[Wayland-bugs] [Bug 104867] Export the number of touches

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104867

Peter Hutterer <peter.hutterer at who-t.net> changed:

           What    |Removed                     |Added
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                 CC|                            |carlosg at gnome.org,
                   |                            |peter.hutterer at who-t.net

--- Comment #1 from Peter Hutterer <peter.hutterer at who-t.net> ---
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.

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