helm/os/arch/.config/panel/panel

#!/usr/bin/env dash

if [ "$1" = "-k" ]; then
    pkill -f '^dash .+/panel$'
    exit
fi

CWD=$(dirname $0)
. $CWD/panel-config

#
cleanup() { rm -rf "$PANEL_FIFO"; pkill -P $$; }

#
trap cleanup INT TERM QUIT EXIT
[ -e "$PANEL_FIFO" ] && rm "$PANEL_FIFO"
mkfifo "$PANEL_FIFO"
echo "MKFIFO $PANEL_FIFO"

if pgrep lemonbar >/dev/null; then
    >&2 echo "Lemonbar is already running"
    exit 1
fi


#
# Bootstrap panel(s)
#

clock -sf "T${ICON_DATE} %A, %b %d   ${ICON_TIME} %I:%M%p" > "${PANEL_FIFO}" &
xtitle -sf 'X%s' > "${PANEL_FIFO}" &
bspc subscribe report > "${PANEL_FIFO}" &

for lemon in $CWD/lemons/*; do
    echo "INIT ${lemon##*/}"
    $lemon > "${PANEL_FIFO}" &
done

#
parse() {
    num_mon=$(bspc query -M | wc -l)
    while read -r line; do
        data="${line#?}"
        case $line in
            # Minimal icons
            B*) battery="$data"
                ;;
            U*) updates=" $data"
                ;;
            M*) mail=" $data"
                ;;
            V*) vol=" %{A:volume.sh toggle:}$data${A}"
                ;;
            I*) wifi=" $data"
                ;;

            # Full segments
            X*) xtitle="$data"
                ;;
            T*) datetime="   $data"
                ;;
            S*) song="$data "
                ;;
            W*) # bspwm's state
                wm=""
                IFS=':'
                set -- $data
                while [ "$#" -gt 0 ]
                do
                    id=$1
                    name=${id#???}
                    case $id in
                        [mM]*)
                            [ "$num_mon" -lt 2 ] && shift && continue
                            case $id in
                                m*) # monitor
                                    _FG=$COLOR_MONITOR_FG
                                    _BG=$COLOR_MONITOR_BG
                                    ;;
                                M*) # focused monitor
                                    _FG=$COLOR_FOCUSED_MONITOR_FG
                                    _BG=$COLOR_FOCUSED_MONITOR_BG
                                    ;;
                            esac
                            wm="${wm}%{F$_FG}%{B$_BG}%{A:bspc monitor -f ${id}:} ${name} %{A}%{B-}%{F-}"
                            ;;
                        [fFoOuU]*)
                            case $id in
                                f*) # free desktop
                                    _FG=$COLOR_FREE_FG
                                    _BG=$COLOR_FREE_BG
                                    ;;
                                F*) # focused free desktop
                                    _FG=$COLOR_FOCUSED_FREE_FG
                                    _BG=$COLOR_FOCUSED_FREE_BG
                                    ;;
                                o*) # occupied desktop
                                    _FG=$COLOR_OCCUPIED_FG
                                    _BG=$COLOR_OCCUPIED_BG
                                    ;;
                                O*) # focused occupied desktop
                                    _FG=$COLOR_FOCUSED_OCCUPIED_FG
                                    _BG=$COLOR_FOCUSED_OCCUPIED_BG
                                    ;;
                                u*) # urgent desktop
                                    _FG=$COLOR_URGENT_FG
                                    _BG=$COLOR_URGENT_BG
                                    ;;
                                U*) # focused urgent desktop
                                    _FG=$COLOR_FOCUSED_URGENT_FG
                                    _BG=$COLOR_FOCUSED_URGENT_BG
                                    ;;
                            esac
                            eval "icon=\$ICON_$(echo $name | tr '[:lower:]' '[:upper:]')"
                            wm="${wm}%{F$_FG}%{B$_BG}%{A:bspc desktop -f ${id#?}:}  ${icon:-$name}  %{A}%{B-}%{F-}"
                            ;;
                    esac
                    shift
                done
                ;;
        esac
        echo -e \
            "%{l}${wm}${song}" \
            "%{c}${xtitle}" \
            "%{r}${battery}${mail}${updates}${vol}${wifi}${datetime}  "
    done
}

parse < "${PANEL_FIFO}" | \
    lemonbar \
    -a 32 \
    -g x$PANEL_HEIGHT \
    -f "$PANEL_FONT" \
    -f "$ICON_FONT" \
    -F "$COLOR_FG" \
    # -B "$COLOR_BG" \
    | sh &

wait