#! /bin/bash
# VT Escape sequence test tool

# how to use
usage()
{
cat <<EOD
$0 [-urc][-f foreground][-b background] any strings
 -u under line
 -r riverce
 -c clear ESC sequence and screen
 -f/b colorname
 colorname:
	`esc -b white -f black 0, kuro, black`
	`esc -b white -f red 1, aka, red`
	`esc -b white -f green 2, midori, green`
	`esc -b white -f blue 4, ao, blue`
	`esc -b white -f purple 5, murasaki, purple, violet`
	`esc -b white -f cyan 6, mizu, cyan`
	`esc -b black -f white 7, shiro, white`
EOD
 exit 0
}

# convert color nmae to code
color2seq()
{
	color=`echo $1|tr A-Z a-z`
	case $color in
	0|kuro|black) echo 0;;
	1|aka|red) echo 1;;
	2|midori|green) echo 2;;
	3|ki|yellow) echo 3;;
	4|ao|blue) echo 4;;
	5|murasaki|purple|violet) echo 5;;
	6|mizu|cyan) echo 6;;
	7|siro|shiro|white) echo 7;;
	esac
}

# preset escape sequence
seqS='\033['
seq0=""
seq1="30"
seq2="47"
seqE='\033[0m'

## option analize
while getopts :curhf:b: n
do
	case $n in
	b) seq2="4`color2seq $OPTARG`" ;;
	c) echo $seqE; clear; exit 0;;
	f) seq1="3`color2seq $OPTARG`" ;;
	r) seq0="${seq0}7;" ;;
	u) seq0="${seq0}4;" ;;
	h|?) usage ;;
	esac
done
let argc=OPTIND-1
shift $argc

# print arguments with rendering
echo -e "$seqS$seq0$seq1;${seq2}m$*$seqE"