#!/usr/bin/env bash
set -o errexit
set -o pipefail

main() {
  _setup_elan_touchpad
  _setup_trackman_marble
}

_setup_elan_touchpad() {
  local etp='Elan Touchpad'

  if ! xinput list-props "${etp}" &>/dev/null; then
    return
  fi
  xinput set-prop "${etp}" 'libinput Tapping Enabled' 1
  xinput set-prop "${etp}" 'libinput Natural Scrolling Enabled' 1
}

_setup_trackman_marble() {
  local tmm='Logitech USB Trackball'

  if ! xinput list-props "${tmm}" &>/dev/null; then
    return
  fi
  xinput set-prop "${tmm}" 'libinput Button Scrolling Button' 8
  xinput set-prop "${tmm}" 'libinput Scroll Method Enabled' 0 0 1
}

main "${@}"