#!/bin/bash
# Test ACS Line Graphics and REP capability of a terminal line
# Author: Werner Fink <werner@suse.de>

typeset -i rep=0 line=0
for s in 0 1 2
do
    test -c /proc/$$/fd/$s || { echo "Missing /proc/$$/fd/$s" 1>&2; exit 1; }
done
for d in null tty
do
    test -c /dev/$d || { echo "Missing /dev/$d" 1>&2; exit 1; }
done
for d in pts fd
do
    test -d /dev/$d || { echo "Missing /dev/$d/" 1>&2; exit 1; }
done
for p in tput infocmp fold tty grep od
do
    type -p $p 1> /dev/null 2>&1 || { echo "Missing $p in path" 1>&2; exit 1; }
done

typeset -r tty=$(tty) || { echo "Not on a terminal line" 1>&2; exit 1; }
typeset -i width=$(tput cols) || { echo "No terminal size" 1>&2; exit 1; }
typeset -i height=$(tput lines) || { echo "No terminal size" 1>&2; exit 1; }

#
# There are terminal type which uses non printable characters for
# Line Graphic. Therefore store them as numbers or sequences within
# arrays used later on.
#
typeset -i c
typeset -a tmp="($(tput acsc | od -A none -tx1))" acsc acsn
for ((c=0;c<${#tmp[@]};c+=2))
do
    acsc[0x${tmp[c]}]="0x${tmp[c+1]}"
    acsn[0x${tmp[c]}]=\\x${tmp[c+1]}
done
unset tmp c

#
# Init terminal
#
tput init || { echo "Not a terminal" 1>&2; exit 1; }

#
# Restore screen at exit
#
trap 'tput cvvis; tput rmcup' EXIT HUP INT TERM

#
# Save screen, make curse invisible, and goto upper left
#
tput smcup
tput civis
tput cup 0 0
tput ed

echo Checking for Line Graphics on $tty with TERM=$TERM
let line++
if ((${#acsc[@]} > 0))
then
    echo Terminal TERM=$TERM has ASC Line Graphics, check them.
    let line++
    tput cup $((height/2)) 0
    tput -S <<-!
	enacs
	smacs
	!
    echo -ne ${acsn[0x6c]}
    for ((c=0;c<20;c++)); do echo -ne ${acsn[0x71]}; done
    echo -ne ${acsn[0x6b]}
    tput cup $((height/2+1)) 0
    echo -ne ${acsn[0x78]}
    tput hpa 21
    echo -ne ${acsn[0x78]}
    tput cup $((height/2+2)) 0
    echo -ne ${acsn[0x78]}
    tput hpa 21
    echo -ne ${acsn[0x78]}
    tput cup $((height/2+3)) 0
    echo -ne ${acsn[0x78]}
    tput hpa 21
    echo -ne ${acsn[0x78]}
    tput cup $((height/2+4)) 0
    echo -ne ${acsn[0x6d]}
    for ((c=0;c<20;c++)); do echo -ne ${acsn[0x71]}; done
    echo -ne ${acsn[0x6a]}
    tput -S <<-!
	rmacs
	!
    tput cup $line 0
    tput cvvis
    echo -n "OK> "
    read -t 5 yesno
else
    echo Terminal TERM=$TERM has no ASC Line Graphics. Done
    exit 0
fi

#
# Could use clear
#
tput -S <<-!
	cup 0 0
	ed
	!
let line=0
if test -n "$(infocmp -T $TERM -1 | grep rep=)"
then
    echo Found rep capability in terminfo database for TERM=$TERM
    let rep++
    let line++
else
    echo No rep capability given in terminfo database for TERM=$TERM
    echo -n "OK> "
    read -t 5 yesno
    exit 0
fi
if ((rep > 0))
then
    echo Testing rep capability of TERM=$TERM 
    let line++
    tput -S <<-!
	civis
	enacs
	smacs
	bold
	cup $((height/2)) 0
	rep ${acsc[0x6c]} 0
	rep ${acsc[0x71]} 20
	rep ${acsc[0x6b]} 0
	cup $((height/2+1)) 0
	rep ${acsc[0x78]} 0
	hpa 21
	rep ${acsc[0x78]} 0
	cup $((height/2+2)) 0
	rep ${acsc[0x78]} 0
	hpa 21
	rep ${acsc[0x78]} 0
	cup $((height/2+3)) 0
	rep ${acsc[0x78]} 0
	hpa 21
	rep ${acsc[0x78]} 0
	cup $((height/2+4)) 0
	rep ${acsc[0x6d]} 0
	rep ${acsc[0x71]} 20
	rep ${acsc[0x6a]} 0
	sgr0
	rmacs
	cvvis
	!
    tput cup $line 0
    echo -n "OK> "
    read -t 5 yesno
fi