rework volume control

usr/bin/x-volume

@@ -0,0 +1,56 @@
+#!/usr/bin/env sh
+
+# the amount to increase / decrease each time
+[ -z "$AMOUNT" ] && AMOUNT=5
+
+# utility for sending notifications easily
+notify() {
+	notify-send "$@" -h string:x-dunst-stack-tag:'audioctl' -a 'audioctl'
+}
+
+# get current volume information
+vol_str="$(wpctl get-volume @DEFAULT_AUDIO_SINK@)"
+
+# Remove leading non-numeric or zero characters, then remove remaining non-numeric characters.
+# NOTE: if zero (0.00), the string will be empty. This is fine for arithmetic operations.
+vol_int="$(echo "$vol_str" | sed 's/^[^1-9]*//; s/[^0-9]//g')"
+
+# if the string contains MUTED, set the variable accordion
+case "$vol_str" in
+*MUTED*) vol_off=1 ;;
+*) vol_off=0 ;;
+esac
+
+# handle what action to perform from the argument
+echo $vol_off
+case $1 in
+up) vol_int=$((vol_int + AMOUNT)) ;;
+down) vol_int=$((vol_int - AMOUNT)) ;;
+mute) vol_off=$((!vol_off)) ;;
+*)
+	echo 'E: could not decide what audio action to perform!' >&2
+	notify 'could not decide what audio action to perform!' -u critical -t 5000
+	exit 1
+	;;
+esac
+vol_int=$((vol_int - (vol_int % AMOUNT)))
+vol_pcnt=$(echo "scale = 2; $vol_int / 100;" | bc)
+
+echo $vol_off
+wpctl set-volume @DEFAULT_AUDIO_SINK@ "$vol_pcnt"
+wpctl set-mute @DEFAULT_AUDIO_SINK@ "$vol_off"
+
+play -n synth 0.005 sine 1000 vol 0.2 2>/dev/null
+
+if [ "$vol_int" -eq 0 ] || [ "$vol_off" -eq 1 ]; then
+	ico=audio-volume-muted
+elif [ "$vol_int" -lt 33 ]; then
+	ico=audio-volume-low
+elif [ "$vol_int" -lt 66 ]; then
+	ico=audio-volume-medium
+else
+	ico=audio-volume-high
+fi
+
+str="volume: $vol_int% $([ $vol_off -eq 1 ] && printf '(MUTE)')"
+notify -i "$ico" -u low -h "int:value:$vol_int" "$str"