xf86-input-libinput: Changes to 'master'

[Peter Hutterer]

 src/xf86libinput.c |  126 ++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 105 insertions(+), 21 deletions(-)

New commits:
commit 0dad7408fac3b69c4b6ab7705f39f790d7ba20c2
Author: Peter Hutterer <peter.hutterer at who-t.net>
Date:   Mon Nov 28 14:09:06 2016 +1000

    Calculate the required scroll distance based on the angle
    
    For a mouse with a click angle of 15 degrees things are unchanged. For devices
    with angles less than 10, the current code scrolled way too fast. Because the
    angle wasn't used anywhere, each tick would count as full scroll wheel event,
    a slight movement of the wheel would thus scroll as much as a large movement
    on a normal mouse.
    
    Fix this by taking the actual click angle of the device into account. We
    calculate some multiple of the angle that's close enough to the default 15
    degrees of the wheel and then require that many click events to hit the full
    scroll distance. For example, a mouse with a click angle of 3 degrees now
    requires 5 clicks to trigger a full legacy scroll button event.
    
    XI2.1 clients get the intermediate events (i.e. in this case five times
    one-fifth of the scroll distance) and can thus scroll smoothly, or more
    specifically in smaller events than usual.
    
    https://bugs.freedesktop.org/show_bug.cgi?id=92772
    
    Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
    Reviewed-by: Hans de Goede <hdegoede at redhat.com>

commit ea02578a4e888d9908eb6bed6dcb858f78acb8bb
Author: Peter Hutterer <peter.hutterer at who-t.net>
Date:   Tue Nov 29 08:31:32 2016 +1000

    Move axis value calculation into a helper function
    
    The only difference here is the axis number.
    
    Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
    Reviewed-by: Hans de Goede <hdegoede at redhat.com>

commit 2ceb2e1b18b6f971706230d16a2a5665d87aabd4
Author: Peter Hutterer <peter.hutterer at who-t.net>
Date:   Tue Nov 29 09:21:24 2016 +1000

    Add a comment regarding scroll dist default values
    
    Changed this during development because I forgot that the value actually
    matters (for touchpads anyway).
    
    Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
    Reviewed-by: Hans de Goede <hdegoede at redhat.com>