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#!/bin/bash
# dotfiles -- scripts/battery.sh
# author: johannst
bat="${BLOCK_INSTANCE:-BAT0}"
[[ ! -f "/sys/class/power_supply/$bat/type" ]] && exit 1
# Auto-detect file prefix for battery files
for prefix in energy charge; do
[[ -f "/sys/class/power_supply/$bat/${prefix}_now" ]] && {
file_prefix=$prefix
break
}
done && test -n $file_prefix || exit 1
show_bat_use_design_capacity=0
show_bat_status=0
show_bat_color_output=0
for arg in "$@"; do
case $arg in
-dc | --design_capacity) show_bat_use_design_capacity=1
;;
-s | --status) show_bat_status=1
;;
-c | --color) show_bat_color_output=1
;;
*) # ignore unknown
;;
esac
done
# Unknown, Charging, Discharging, Full
BAT_STATUS=$(cat /sys/class/power_supply/$bat/status)
BAT_NOW=$(cat /sys/class/power_supply/$bat/${file_prefix}_now)
[[ $show_bat_use_design_capacity == 1 ]] \
&& BAT_FULL=$(cat /sys/class/power_supply/$bat/${file_prefix}_full_design) \
|| BAT_FULL=$(cat /sys/class/power_supply/$bat/${file_prefix}_full)
BAT_POWER=$(echo $BAT_NOW $BAT_FULL | awk '{ print int($1 * 100 / $2); }')
OUT="$BAT_POWER%"
[[ $show_bat_status == 1 ]] && \
case $BAT_STATUS in
Charging) OUT="$OUT (charging)"
# Disable status colors when charging.
show_bat_color_output=0
;;
Discharging) OUT="$OUT (on battery)"
;;
*) # only show charging state for now
;;
esac
# i3bar protocol:
# - line 1: full_text
# - line 2: short_text
# - line 3: fg-color
# - line 4: bg-color
echo "$OUT" # full txt
[[ $show_bat_color_output == 1 ]] && {
echo "" # short txt
if [[ $BAT_POWER -lt 10 ]]; then
# red
echo "#000000" # fg
echo "#FF0000" # bg
elif [[ $BAT_POWER -lt 15 ]]; then
# dark orange
echo "#000000" # fg
echo "#FFAE00" # bg
elif [[ $BAT_POWER -lt 20 ]]; then
# yellow
echo "#000000" # fg
echo "#FFF600" # bg
fi
}
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