bash-menu-select.sh

#!/bin/bash

menu_select() {
    declare -a menu
    local options="$@"
    menu=($options)
    cur=0

    draw_menu() {
        for i in "${menu[@]}"; do
            if [[ ${menu[$cur]} == $i ]]; then
                tput setaf 2; echo " > $i"; tput sgr0
            else
                echo "   $i";
            fi
        done
    }

    clear_menu()  {
        for i in "${menu[@]}"; do tput cuu1; done
        tput ed
    }

    # Draw initial Menu
    draw_menu
    while read -sN1 key; do # 1 char (not delimiter), silent
        # Check for enter/space
        if [[ "$key" == "" ]]; then break; fi

        # catch multi-char special key sequences
        read -sN1 -t 0.0001 k1; read -sN1 -t 0.0001 k2; read -sN1 -t 0.0001 k3
        key+=${k1}${k2}${k3}

        case "$key" in
            # cursor up, left: previous item
            h|k|$'\e[A'|$'\e0A'|$'\e[D'|$'\e0D') ((cur > 0)) && ((cur--));;
            # cursor down, right: next item
            j|l|$'\e[B'|$'\e0B'|$'\e[C'|$'\e0C') ((cur < ${#menu[@]}-1)) && ((cur++));;
            # home: first item
            $'\e[1~'|$'\e0H'|$'\e[H')  cur=0;;
            # end: last item
            $'\e[4~'|$'\e0F'|$'\e[F') ((cur=${#menu[@]}-1));;
             # q, carriage return: quit
            q|''|$'\e')echo "Aborted." && exit;;
        esac
        # Redraw menu
        clear_menu
        draw_menu
    done

    echo "Selected item $cur: ${menu[$cur]}";
}


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