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#!/bin/bash
# One of the following: xrandr, xbacklight, kernel
METHOD="xbacklight"
# Left click
if [[ "${BLOCK_BUTTON}" -eq 1 ]]; then
xbacklight -inc 10
# Right click
elif [[ "${BLOCK_BUTTON}" -eq 3 ]]; then
xbacklight -dec 10
fi
URGENT_VALUE=10
if [[ "${METHOD}" = "xrandr" ]]; then
device="${BLOCK_INSTANCE:-primary}"
xrandrOutput=$(xrandr --verbose)
if [[ "${device}" = "primary" ]]; then
device=$(echo "${xrandrOutput}" | grep 'primary' | head -n 1 | awk -F ' ' '{print $1}')
fi
curBrightness=$(echo "${xrandrOutput}" | grep "${device}" -A 5 | grep -i "Brightness" | awk -F ':' '{print $2}')
elif [[ "${METHOD}" = "kernel" ]]; then
device="${BLOCK_INSTANCE:-intel_backlight}"
maxBrightness=$(cat /sys/class/backlight/${device}/max_brightness)
curBrightness=$(cat /sys/class/backlight/${device}/brightness)
elif [[ "${METHOD}" = "xbacklight" ]]; then
curBrightness=$(xbacklight -get)
fi
if [[ "${curBrightness}" -le 0 ]]; then
exit
fi
if [[ "${METHOD}" = "xrandr" ]]; then
percent=$(echo "scale=0;${curBrightness} * 100" | bc -l)
elif [[ "${METHOD}" = "kernel" ]]; then
percent=$(echo "scale=0;${curBrightness} / ${maxBrightness} * 100" | bc -l)
elif [[ "${METHOD}" = "xbacklight" ]]; then
percent=$(echo "scale=0;${curBrightness}" | bc -l)
fi
percent=${percent%.*}
if [[ "${percent}" -le 0 ]]; then
exit
fi
echo "${label} ${percent}%"
echo "${label} ${percent}%"
echo ""
if [[ "${percent}" -le "${URGENT_VALUE}" ]]; then
exit 33
fi