Script to find all xinput mice and make them use natural scrolling

999natural

#!/bin/sh

# The contents should go in /usr/lib/pm-utils/sleep.d/999natural

case "$1" in
    resume)
        python /home/brad/bin/natural
esac

natural

#!/usr/bin/python

# The contents of this file should go in /home/brad/bin/natural

"""
Find all input devices and switch them to use natural scrolling
"""

from subprocess import check_output as run


# Get devices that need to be updated
mice = list(map(
    lambda mouse: mouse.split('\t')[1].split('=')[1],
    filter(
        lambda d: d.find('Optical') > -1 or d.find('Touchpad') > -1,
        run(['xinput', 'list']).decode('utf8').split('\n')
    )
))

# For all mice, loop over the props to find props that need updating
for mouse in mice:
    props = run(['xinput', 'list-props', mouse]).decode('utf8').split('\n')
    for prop in props[1:-1]:
        prop_id = prop.split('(')[1].split(')')[0]
        val = prop.split(':')[1]
        if prop.find('Natural Scrolling Enabled (') > -1:
            # Enable the natural scrolling property
            run(['xinput', 'set-prop', mouse, prop_id, '1'])
        elif prop.find('Synaptics Scrolling Distance') > -1:
            # Negate the scrolling distance
            vals = list(map(
                lambda p: '-{}'.format(abs(int(p.strip()))),
                val.split(','))
            )
            run(['xinput', 'set-prop', mouse, prop_id, vals[0], vals[1]])