[PATCH libinput] touchpad: implement edge-based basic palm detection

[Daniel Martin]

On Fri, Jul 11, 2014 at 11:08:53AM +1000, Peter Hutterer wrote:
> A large part of palm events are situated on the far edges of the touchpad. In
> a test run on a T440s while typing a long email all but 2 touch points were
> located in the outer ~5% of the touchpad. Define a 10% exclusion zone on the
> left and right edges in which new touchpoint is automatically assigned to be a
> palm.
> 
> A finger may move into that exclusion zone without being marked as palm, it
> just can't start in one.
> 
> On clickpads, the exclusion zone does not extend into the software buttons.
> 
> Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
> ---

I don't have the big picture (of libinput) atm. Does this stand in the
way of edge-scolling (in the future)?