#!/usr/bin/env rc
# many thanks to bruenig and Thayer

secs=3
bg='#080808'
fg='#eeeeee'
bar_fg='#eeeeee'
bar_bg='#949494'
height=24
width=192
bar_width=160
font=fixed

xy=`{xdpyinfo | grep dimensions: | awk '{print $2}' | sed 's/x/ /' }
xpos=`{expr '(' $xy(1) - $width ')' / 2}
ypos=`{expr '(' $xy(2) - $height ')' / 2}

pipe=/tmp/dvolpipe
pmixargs=()

fn err {
    echo $1
    exit 1
}

switch($1) {
    case -i --increase
        if(~ $2 '') err 'No argument specified for increase'
        pmixargs=(increase $2)
    case -d --decrease
        if(~ $2 '') err 'No argument specified for decrease'
        pmixargs=(decrease $2)
    case -t --toggle
        pmixargs=(toggle)
    case '' -h --help
        echo 'usage: dvol [option] [argument]'
        echo
        echo 'Options:'
        echo '     -i, --increase - increase volume by `argument'''
        echo '     -d, --decrease - decrease volume by `argument'''
        echo '     -t, --toggle   - toggle mute on and off'
        echo '     -h, --help     - display this'
        exit 0
    case *
        err 'Unrecognized option `'$1''', see dvol --help'
}

echo ponymix $pmixargs
newvolume=0
volume=`{ponymix $pmixargs}
if(! ponymix is-muted) {
    newvolume=$volume
}

if(! test -e $pipe) {
    mkfifo $pipe
    echo dzen2 -tw $width -h $height -x $xpos -y $ypos -fn $font -bg $bg -fg $fg
    {dzen2 -tw $width -h $height -x $xpos -y $ypos -fn $font -bg $bg -fg $fg < $pipe; rm -f $pipe} &
}

output=`{echo $newvolume | gdbar -h 8 -fg $bar_fg -bg $bar_bg -w $bar_width}
echo $output
{echo $newvolume | gdbar -h 8 -fg $bar_fg -bg $bar_bg -w $bar_width; sleep $secs} > $pipe