108 lines
3.4 KiB
Plaintext
108 lines
3.4 KiB
Plaintext
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#!/bin/sh
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# By Giorgos Keramidas
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# From: https://unix.stackexchange.com/questions/260409/set-bindings-in-i3-to-control-keyboard-backlight
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# backlight_get
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# Print current keyboard brightness from UPower to stdout.
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backlight_get()
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{
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dbus-send --type=method_call --print-reply=literal --system \
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--dest='org.freedesktop.UPower' \
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'/org/freedesktop/UPower/KbdBacklight' \
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'org.freedesktop.UPower.KbdBacklight.GetBrightness' \
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| awk '{print $2}'
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}
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# backlight_get_max
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# Print the maximum keyboard brightness from UPower to stdout.
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backlight_get_max()
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{
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dbus-send --type=method_call --print-reply=literal --system \
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--dest='org.freedesktop.UPower' \
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'/org/freedesktop/UPower/KbdBacklight' \
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'org.freedesktop.UPower.KbdBacklight.GetMaxBrightness' \
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| awk '{print $2}'
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}
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# backlight_set NUMBER
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# Set the current backlight brighness to NUMBER, through UPower
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backlight_set()
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{
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value="$1"
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if test -z "${value}" ; then
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echo "Invalid backlight value ${value}"
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fi
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dbus-send --type=method_call --print-reply=literal --system \
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--dest='org.freedesktop.UPower' \
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'/org/freedesktop/UPower/KbdBacklight' \
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'org.freedesktop.UPower.KbdBacklight.SetBrightness' \
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"int32:${value}}"
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}
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# backlight_change [ UP | DOWN | NUMBER ]
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# Change the current backlight value upwards or downwards, or
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# set it to a specific numeric value.
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backlight_change()
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{
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change="$1"
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if test -z "${change}" ; then
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echo "Invalid backlight change ${change}." \
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"Should be 'up' or 'down'." >&2
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return 1
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fi
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case ${change} in
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[1234567890]|[[1234567890][[1234567890])
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current=$( backlight_get )
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max=$( backlight_get_max )
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value=$( expr ${change} + 0 )
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if test ${value} -lt 0 || test ${value} -gt ${max} ; then
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echo "Invalid backlight value ${value}." \
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"Should be a number between 0 .. ${max}" >&2
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return 1
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else
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backlight_set "${value}"
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notify-send -t 800 "Keyboard brightness set to ${value}"
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fi
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;;
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[uU][pP])
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current=$( backlight_get )
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max=$( backlight_get_max )
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if test "${current}" -lt "${max}" ; then
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value=$(( ${current} + 1 ))
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backlight_set "${value}"
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notify-send -t 800 "Keyboard brightness set to ${value}"
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fi
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;;
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[dD][oO][wW][nN])
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current=$( backlight_get )
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if test "${current}" -gt 0 ; then
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value=$(( ${current} - 1 ))
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backlight_set "${value}"
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notify-send -t 800 "Keyboard brightness set to ${value}"
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fi
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;;
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*)
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echo "Invalid backlight change ${change}." >&2
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echo "Should be 'up' or 'down' or a number between" \
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"1 .. $( backlight_get_max )" >&2
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return 1
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;;
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esac
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}
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if test $# -eq 0 ; then
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current_brightness=$( backlight_get )
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notify-send -t 800 "Keyboard brightness is ${current_brightness}"
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else
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# Handle multiple backlight changes, e.g.:
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# backlight.sh up up down down up
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for change in "$@" ; do
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backlight_change "${change}"
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done
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fi
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