dotfiles/udev/handle-trackman-marble
2023-02-08 11:51:12 -05:00

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#!/usr/bin/env bash
set -o errexit
set -o pipefail
main() {
export RUNNING_AS="${RUNNING_AS:-dan}"
RUNNING_AS_ID="$(id -u "${RUNNING_AS}")"
export RUNNING_AS_ID
export XINPUT_EXE="${XINPUT_EXE:=xinput}"
export XAUTHORITY="/run/user/${RUNNING_AS_ID}/gdm/Xauthority"
export DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/${RUNNING_AS_ID}/bus"
: "${DISPLAY:=0}"
export DISPLAY
export HOME="/home/${RUNNING_AS}"
local device_id
device_id="$(__get_device_id)"
local natscroll_enabled
natscroll_enabled="$(
__get_prop_id "${device_id}" 'Natural Scrolling Enabled'
)"
local scrollmeth_enabled
scrollmeth_enabled="$(
__get_prop_id "${device_id}" 'Scroll Method Enabled'
)"
local scrollbutton
scrollbutton="$(
__get_prop_id "${device_id}" 'Button Scrolling Button'
)"
__run_xinput_as set-prop "${device_id}" "${natscroll_enabled}" 1
__run_xinput_as set-prop "${device_id}" "${scrollmeth_enabled}" 0 0 1
__run_xinput_as set-prop "${device_id}" "${scrollbutton}" 8
}
__get_device_id() {
__run_xinput_as list |
awk '/Logitech USB Trackball/ { sub(/id=/, "", $6); print $6 }'
}
__get_prop_id() {
local device_id="${1}"
local propmatch="${2}"
__run_xinput_as list-props "${device_id}" |
awk -F: '/'"${propmatch}"' \([0-9]+\)/ {
sub(/.+\(/, "", $1);
sub(/\).*/, "", $1);
print $1;
}'
}
__run_xinput_as() {
sudo -E -u "${RUNNING_AS}" "${XINPUT_EXE}" "${@}"
}
main "${@}"