A device may send axis events while the tool is out of proximity,
causing our plugin to force a proximity in for the pen. If the tool then
sends a proximity event for a different tool we ended up with two tools
in proximity.
The sequence in #1171 shows this:
- evdev:
- [ 1, 499608, 3, 27, 0] # EV_ABS / ABS_TILT_Y 0 (+30)
- [ 1, 499608, 0, 0, 0] # ------------ SYN_REPORT (0) ---------- +0ms
- evdev:
- [ 2, 199637, 1, 321, 1] # EV_KEY / BTN_TOOL_RUBBER 1
- [ 2, 199637, 4, 4, 30] # EV_MSC / MSC_SCAN 30 (obfuscated)
- [ 2, 199637, 1, 330, 1] # EV_KEY / BTN_TOUCH 1
- [ 2, 199637, 3, 0, 910] # EV_ABS / ABS_X 910 (+246)
- [ 2, 199637, 3, 1, 8736] # EV_ABS / ABS_Y 8736 (-105)
- [ 2, 199637, 3, 27, -25] # EV_ABS / ABS_TILT_Y -25 (-25)
- [ 2, 199637, 0, 0, 0] # ------------ SYN_REPORT (0) ---------- +700ms
Fix this by remembering that we forced the tool out of proximity so if
we see tool events for another tool we force the pen out of proximity
again.
This will have some interplay with the other tablet plugins but
hopefully none that affect real-world devices, e.g. forcing a proximity
out means the proximity out timer plugin gets disabled. Since devices
behave in unexpected manners anyway let's see if it affects a real-world
device.
Closes#1171
Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1306>
The vast majority of plugins are only interested in a single or a few
devices. Require that they enable the frame callback for those devices
and don't notify them for any other frames.
Give each plugin a unique index and use that for a bitmask to check if
the plugin wants events for a particular device. If not, skip it.
Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1229>
