Add proximity support.

When one of the tools comes into proximity, queue up a proximity event and
send it accordingly.

Includes special handling for tablets that do not send axes with tools
(#29645)

Some tablets send axis values, then EV_SYN, and in the next event the
BTN_TOOL_PEN/BTN_TOUCH, etc. For these tablets, the cursor doesn't move as
coordinates while not in proximity are ignored.

Buffer coordinates received while out-of-proximity and if we get a proximity
event without other coordinates, re-use the last ones received.

X.Org Bug 29645 <http://bugs.freedesktop.org/show_bug.cgi?id=29645>

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
Reviewed-by: Benjamin Tissoires <tissoire@cena.fr>

0 files changed, 0 insertions, 0 deletions