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Rewrite brightness script
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@ -197,13 +197,13 @@ myKeys =
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, ("<XF86AudioMute>", spawn "pulsemixer --toggle-mute")
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, ("<XF86AudioLowerVolume>", spawn "pulsemixer --change-volume -5")
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, ("<XF86AudioRaiseVolume>", spawn "pulsemixer --change-volume +5")
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, ("<XF86MonBrightnessUp>", spawn "brightness + 5 %")
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, ("<XF86MonBrightnessDown>", spawn "brightness - 5 %")
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, ("<XF86MonBrightnessUp>", spawn "brightness -i 5%")
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, ("<XF86MonBrightnessDown>", spawn "brightness -d 5%")
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-- Map media keys to meta + arrows for keyboards without special keys
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, ("M-<Down>", spawn "pulsemixer --change-volume -5")
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, ("M-<Up>", spawn "pulsemixer --change-volume +5")
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, ("M-<Right>", spawn "brightness + 5 %")
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, ("M-<Left>", spawn "brightness - 5 %")
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, ("M-<Right>", spawn "brightness -i 5%")
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, ("M-<Left>", spawn "brightness -d 5%")
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]
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where nonNSP = WSIs (return (\ws -> W.tag ws /= "NSP"))
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nonEmptyNonNSP = WSIs (return (\ws -> isJust (W.stack ws) && W.tag ws /= "NSP"))
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@ -1,63 +1,153 @@
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#!/bin/sh
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BRIGHTNESS_FILE="/sys/class/backlight/intel_backlight/brightness"
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BRIGHTNESS_MAX=937
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function change_brightness() {
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BRIGHTNESS=$(cat $BRIGHTNESS_FILE)
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# Parse arguments
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# ------------------------------------------------------------------------------------
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BRIGHTNESS_DIR="/sys/class/backlight/*"
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SEND_NOTIFICATION=0
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URGENCY="normal"
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INCREASE=0
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DECREASE=0
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SET=0
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BRIGHTNESS=0
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change_value=$2
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while [ "$1" ]; do
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case "$1" in
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-h | --help)
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cat << EOF
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brightness is a cli tool that for displaying or modifying screen brightness.
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# If we're dealing with percentages, convert to absolutes
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if [ $3 == "%" ]; then
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change_value=$((($BRIGHTNESS_MAX / 100) * $change_value))
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elif [ $3 == "#" ]; then
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change_value=$change_value
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else
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echo "Invalid unit, options: [% - percent, # - absolute], default: %"
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exit 1
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Options:
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-h | --help: Display this message
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-n | --notification: Produce a desktop notification with brightness info
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-N | --no-notification: Don't produce a desktop notification with brightness info
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-u | --urgency [URGENCY]: Pass over notify-send urgency attribute (default: normal)
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-i | --increase [BRIGHTNESS]: Increase the brightness by given amount
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-d | --decrease [BRIGHTNESS]: Decrease the brightness by given amount
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-s | --set [BRIGHTNESS]: Set new brightness level
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-p | --path [DIR_PATH]: Path to brightness directory (default: /sys/class/backlight/*)
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Valid values:
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URGENCY: low, normal, critical
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DIR_PATH: Valid path to a directory
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BRIGHTNESS:
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specific value - Example: 10
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percentage value - Example: 10%
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EOF
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exit 0
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;;
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-n | --notification)
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SEND_NOTIFICATION=1
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;;
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-N | --no-notification)
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SEND_NOTIFICATION=0
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;;
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-u | --urgency)
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URGENCY="$2"
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shift
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;;
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-i | --increase)
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INCREASE=1
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BRIGHTNESS="$2"
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shift
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;;
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-d | --decrease)
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DECREASE=1
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BRIGHTNESS="$2"
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shift
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;;
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-s | --set)
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SET=1
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BRIGHTNESS="$2"
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shift
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;;
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-p | --path)
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BRIGHTNESS_DIR="$2"
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shift
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;;
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* )
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echo "Unknown argument '$1', use -h or --help for help"
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exit 1
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;;
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esac
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shift
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done
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# Define constants based on parsed arguments
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# ------------------------------------------------------------------------------------
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BRIGHTNESS_FILE="$BRIGHTNESS_DIR/brightness"
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BRIGHTNESS_MAX="$(cat $BRIGHTNESS_DIR/max_brightness)"
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# Helper functins
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# ------------------------------------------------------------------------------------
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# Send brightness level desktop notification, showing the given brightness level
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# as progress bar, along with given message.
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# $1 - brightness level (number 0-100)
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# $2 - message (notification body)
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send_brightness_notify() {
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percent_brightness="$1"
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msg="$2"
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notify-send \
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--app-name=brightness \
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--urgency="$URGENCY" \
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-h int:value:$percent_brightness \
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-h string:synchronous:brightness \
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"brightness" "$msg"
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}
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# Set brightness to given absolute value
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# $1 - brightness absolute value
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set_brightness() {
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# there should be sudo config allowing this command without password
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echo "$1" | sudo tee $BRIGHTNESS_FILE >/dev/null
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}
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# Main Logic
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# ------------------------------------------------------------------------------------
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# Determine the absolute new brightness level
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if [ $INCREASE -eq 1 ] || [ $DECREASE -eq 1 ] || [ $SET -eq 1 ]; then
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# If we're dealing with percentages, change to absolutes
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if echo "$BRIGHTNESS" | grep -qE '%$'; then
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numeric=$(echo "$BRIGHTNESS" | sed 's/.$//')
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absolute=$(echo "($BRIGHTNESS_MAX / 100) * $numeric" | bc -l)
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BRIGHTNESS=$(printf "%.0f" $absolute)
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fi
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# Increment or decrement based on first arg
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if [ $1 == "+" ]; then
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new_brightness=$(($BRIGHTNESS + $change_value))
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elif [ $1 == "-" ]; then
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new_brightness=$(($BRIGHTNESS - $change_value))
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# Get the new requested absolute brightness
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if [ $SET -eq 1 ]; then
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new_brightness=$BRIGHTNESS
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elif [ $DECREASE -eq 1 ]; then
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cur_brightness=$(cat $BRIGHTNESS_FILE)
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new_brightness=$(($cur_brightness - $BRIGHTNESS))
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else
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echo "Invalid operator, options: [+, -]"
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exit 1
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cur_brightness=$(cat $BRIGHTNESS_FILE)
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new_brightness=$(($cur_brightness + $BRIGHTNESS))
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fi
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# Make sure we respect min/max boundaries
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# Ensure we respect max/min boundaries
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if [ $new_brightness -lt 0 ]; then
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new_brightness=0
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elif [ $new_brightness -gt $BRIGHTNESS_MAX ]; then
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new_brightness=$BRIGHTNESS_MAX
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fi
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# Write the brightness (sudo shouldn't require password here)
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echo $new_brightness | sudo tee $BRIGHTNESS_FILE
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}
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if [ $# -ge 1 ] && [ "$1" == "+" ] || [ "$1" == "-" ]; then
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if [ $# -lt 2 ]; then
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change_value=5 # Default to 5%
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else
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change_value=$2
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fi
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if [ $# -lt 3 ]; then
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unit="%"
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else
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unit=$3
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fi
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change_brightness $1 $change_value $unit > /dev/null
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# Update the brightness
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set_brightness $new_brightness
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fi
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# Display new brightness
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cur_brightness=$(cat $BRIGHTNESS_FILE)
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percent_brightness=$(echo "($cur_brightness / $BRIGHTNESS_MAX) * 100" | bc -l)
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percent_brightness_2f=$(printf "%.2f" $percent_brightness)
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percent_brightness_rounded=$(printf "%.0f" $percent_brightness)
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BRIGHTNESS=$(cat $BRIGHTNESS_FILE)
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BRIGHTNESS_PERCENT=$(echo "($BRIGHTNESS / $BRIGHTNESS_MAX) * 100" | bc -l)
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BRIGHTNESS_PERCENT=$(printf "%.2f" $BRIGHTNESS_PERCENT)
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if [ $SEND_NOTIFICATION -eq 1 ]; then
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send_brightness_notify "$percent_brightness_rounded" "Level: $percent_brightness_rounded"
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fi
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echo "Brightness: ${BRIGHTNESS_PERCENT}% (absolute: $BRIGHTNESS)"
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echo "Brightness: ${percent_brightness_2f}% (absolute: $cur_brightness)"
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