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#! /bin/bash
# Ref: https://superuser.com/questions/611538/611582#611582
exec 3>&1
exec 1>/dev/tty
SIGNAL=${1:-SIGTERM}
COMMAND_START="$2"
COMMAND_EXIT="$3"
[ -n "$COLOR" ] && echo -en "\e[${COLOR}m"
# If SIGNAL is received, switch to next display
trap 'next_display' "$SIGNAL"
# Use SIGTSTP (Ctrl-Z in most of the cases) to stop/restart timer
trap 'toggle_timer' SIGTSTP
# Do not print "^C" when SIGINT caught
stty -ctlecho
# Hide the cursor
tput civis
display_list=(STOPWATCH COUNTDOWN PERIOD)
display=0
next_display() {
display=$(( ("$display" + 1) %${#display_list[@]} ))
}
export stop=0
toggle_timer() {
export stop=$(( ("$stop" + 1) %2 ))
}
# Wait user input
read -p '? ' -r input
# Disable input on terminal
stty -echo
# If COMMAND_START is given, run it after timer is set
result="$([ -n "$COMMAND_START" ] && eval "$COMMAND_START" 2>&1)"
notify-send "$result" &>/tmp/openbox
# Modify input to fit the format that `date` can read
hour=$(grep -o '[0-9.]\+h' <<<"$input" | tr -d h)
min=$(grep -o '[0-9.]\+m' <<<"$input" | tr -d m)
sec=$(grep -o '[0-9.]\+s' <<<"$input" | tr -d s)
# seconds user set
SET=$( echo "${hour:-0}*3600 + ${min:-0}*60 + ${sec:-0}" | bc )
# Make sure the value is integer, prevent fail in shell comparison
SET=${SET%%.*}
# seconds pass
count=0
timer() {
start=$(date +%s)
count_from=$count
while [ $count -lt $SET ]; do
# If signal for stop is receive, stop counting
[ $stop = 1 ] && sleep 0.3 && break
count=$(( count_from + $(date +%s) - start ))
case ${display_list[$display]} in
STOPWATCH)
printf '%s\r' "$(date -u -d @$count +%H:%M:%S)"
;;
COUNTDOWN)
printf '%s\r' "$(date -u -d @$((SET - count)) +%H:%M:%S)"
;;
PERIOD)
printf '%s\r' "$(date -u -d @$SET +%H:%M:%S)"
;;
esac
sleep 0.3
done
}
trap 'exec 1>&3; [ -n "COMMAND_EXIT" ] && eval "$COMMAND_EXIT" && unset COMMAND_EXIT; echo `date` $1 >>/tmp/timer.sh; ' EXIT HUP
while [ $count -lt $SET ]; do
[ $stop = true ] && sleep 0.3 && continue
timer
done
# Print bold red text of time that user set
printf "\e[1;31m%s" "$(date -u -d "@$SET" +%H:%M:%S)"
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