#!/bin/sh
# Minimalist touchscreen keyboard, based on any input and timeouts.
# Cycles through letters as long as there is constant input,
# (produced by twiddling thumbs or circling on a touchscreen)
# short pause goes to the next letter (represented _)
# long pause ends input (represented by .)
touchdevice=/dev/input/mice
alphabet="0 1 2 3 4 5 6 7 8 9"
inputwait=0.20
wordwait=2.00
eofwait=5.00
touchevent() {
sleep 0.1
cat "$1" | dd bs=1 count=1 >& /dev/null
}
twiddlethumbs() {
echo "Twiddlethumbs:" 1>&2
sleep 999999 &
wordwaitpid=$!
sleep 999999 &
eofwaitpid=$!
while touchevent "$touchdevice"
do
# Add to phrase if input wait has passed
if [ ! -e /proc/$wordwaitpid ]
then
phrase="$phrase""$wordselect"
fi
# Stop if EOF wait has passed
if [ ! -e /proc/$eofwaitpid ]
then
break
fi
# Reset timeouts.
kill $wordwaitpid $eofwaitpid >& /dev/null
wait $wordwaitpid $eofwaitpid >& /dev/null
sleep $wordwait && echo -n '_' 2>&1 &
wordwaitpid=$!
sleep $eofwait && echo -n '.' 2>&1 &
eofwaitpid=$!
# Show next word:
wordselect="$1"
shift
set -- "$@" "$wordselect"
echo -n -e '\r\033[2K'"$phrase""$wordselect" 1>&2
done
echo 1>&2
echo -n "$phrase"
}
twiddlethumbs $alphabet