109 lines
2.6 KiB
Bash
109 lines
2.6 KiB
Bash
|
#!/bin/bash
|
||
|
|
|
||
|
|
# from SO: https://stackoverflow.com/a/54261882/317605 (by https://stackoverflow.com/users/8207842/dols3m)
|
||
|
|
|
||
|
|
function multiselect() {
|
||
|
|
|
||
|
|
# little helpers for terminal print control and key input
|
||
|
|
ESC=$(printf "\033")
|
||
|
|
cursor_blink_on() { printf "$ESC[?25h"; }
|
||
|
|
cursor_blink_off() { printf "$ESC[?25l"; }
|
||
|
|
cursor_to() { printf "$ESC[$1;${2:-1}H"; }
|
||
|
|
print_inactive() { printf "$2 $1 "; }
|
||
|
|
print_active() { printf "$2 $ESC[7m $1 $ESC[27m"; }
|
||
|
|
get_cursor_row() {
|
||
|
|
IFS=';' read -sdR -p $'\E[6n' ROW COL
|
||
|
|
echo ${ROW#*[}
|
||
|
|
}
|
||
|
|
key_input() {
|
||
|
|
local key
|
||
|
|
IFS= read -rsn1 key 2>/dev/null >&2
|
||
|
|
if [[ $key = "" ]]; then echo enter; fi
|
||
|
|
if [[ $key = $'\x20' ]]; then echo space; fi
|
||
|
|
if [[ $key = $'\x1b' ]]; then
|
||
|
|
read -rsn2 key
|
||
|
|
if [[ $key = [A ]]; then echo up; fi
|
||
|
|
if [[ $key = [B ]]; then echo down; fi
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
toggle_option() {
|
||
|
|
local arr_name=$1
|
||
|
|
eval "local arr=(\"\${${arr_name}[@]}\")"
|
||
|
|
local option=$2
|
||
|
|
if [[ ${arr[option]} == true ]]; then
|
||
|
|
arr[option]=
|
||
|
|
else
|
||
|
|
arr[option]=true
|
||
|
|
fi
|
||
|
|
eval $arr_name='("${arr[@]}")'
|
||
|
|
}
|
||
|
|
|
||
|
|
local retval=$1
|
||
|
|
local options
|
||
|
|
local defaults
|
||
|
|
|
||
|
|
IFS=';' read -r -a options <<<"$2"
|
||
|
|
if [[ -z $3 ]]; then
|
||
|
|
defaults=()
|
||
|
|
else
|
||
|
|
IFS=';' read -r -a defaults <<<"$3"
|
||
|
|
fi
|
||
|
|
local selected=()
|
||
|
|
|
||
|
|
for ((i = 0; i < ${#options[@]}; i++)); do
|
||
|
|
selected+=("${defaults[i]:-false}")
|
||
|
|
printf "\n"
|
||
|
|
done
|
||
|
|
|
||
|
|
# determine current screen position for overwriting the options
|
||
|
|
local lastrow=$(get_cursor_row)
|
||
|
|
local startrow=$(($lastrow - ${#options[@]}))
|
||
|
|
|
||
|
|
# ensure cursor and input echoing back on upon a ctrl+c during read -s
|
||
|
|
trap "cursor_blink_on; stty echo; printf '\n'; exit" 2
|
||
|
|
cursor_blink_off
|
||
|
|
|
||
|
|
local active=0
|
||
|
|
while true; do
|
||
|
|
# print options by overwriting the last lines
|
||
|
|
local idx=0
|
||
|
|
for option in "${options[@]}"; do
|
||
|
|
local prefix=" [ ]"
|
||
|
|
if [[ ${selected[idx]} == true ]]; then
|
||
|
|
prefix=" [x]"
|
||
|
|
fi
|
||
|
|
|
||
|
|
cursor_to $(($startrow + $idx))
|
||
|
|
if [ $idx -eq $active ]; then
|
||
|
|
print_active "$option" "$prefix"
|
||
|
|
else
|
||
|
|
print_inactive "$option" "$prefix"
|
||
|
|
fi
|
||
|
|
((idx++))
|
||
|
|
done
|
||
|
|
|
||
|
|
# user key control
|
||
|
|
case $(key_input) in
|
||
|
|
space) toggle_option selected $active ;;
|
||
|
|
enter) break ;;
|
||
|
|
up)
|
||
|
|
((active--))
|
||
|
|
if [ $active -lt 0 ]; then active=$((${#options[@]} - 1)); fi
|
||
|
|
;;
|
||
|
|
down)
|
||
|
|
((active++))
|
||
|
|
if [ $active -ge ${#options[@]} ]; then active=0; fi
|
||
|
|
;;
|
||
|
|
esac
|
||
|
|
done
|
||
|
|
|
||
|
|
# cursor position back to normal
|
||
|
|
cursor_to $lastrow
|
||
|
|
printf "\n"
|
||
|
|
cursor_blink_on
|
||
|
|
|
||
|
|
eval $retval='("${selected[@]}")'
|
||
|
|
}
|
||
|
|
|
||
|
|
[[ "${1}" != "--source-only" ]] && multiselect "${@}"
|