138 lines
4.1 KiB
Bash
138 lines
4.1 KiB
Bash
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# readlineSync
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# https://github.com/anseki/readline-sync
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#
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# Copyright (c) 2019 anseki
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# Licensed under the MIT license.
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# Use perl for compatibility of sed/awk of GNU / POSIX, BSD. (and tr)
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# Hide "\n" from shell by "\fNL"
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decode_arg() {
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printf '%s' "$(printf '%s' "$1" | perl -pe 's/#(\d+);/sprintf("%c", $1)/ge; s/[\r\n]/\fNL/g')"
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}
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# getopt(s)
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while [ $# -ge 1 ]; do
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arg="$(printf '%s' "$1" | grep -E '^-+[^-]+$' | tr '[A-Z]' '[a-z]' | tr -d '-')"
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case "$arg" in
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'display') shift; options_display="$(decode_arg "$1")";;
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'displayonly') options_displayOnly=true;;
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'keyin') options_keyIn=true;;
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'hideechoback') options_hideEchoBack=true;;
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'mask') shift; options_mask="$(decode_arg "$1")";;
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'limit') shift; options_limit="$(decode_arg "$1")";;
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'casesensitive') options_caseSensitive=true;;
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esac
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shift
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done
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reset_tty() {
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if [ -n "$save_tty" ]; then
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stty --file=/dev/tty "$save_tty" 2>/dev/null || \
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stty -F /dev/tty "$save_tty" 2>/dev/null || \
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stty -f /dev/tty "$save_tty" || exit $?
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fi
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}
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trap 'reset_tty' EXIT
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save_tty="$(stty --file=/dev/tty -g 2>/dev/null || stty -F /dev/tty -g 2>/dev/null || stty -f /dev/tty -g || exit $?)"
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[ -z "$options_display" ] && [ "$options_keyIn" = true ] && \
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[ "$options_hideEchoBack" = true ] && [ -z "$options_mask" ] && silent=true
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[ "$options_hideEchoBack" != true ] && [ "$options_keyIn" != true ] && is_cooked=true
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write_tty() {
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# if [ "$2" = true ]; then
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# printf '%b' "$1" >/dev/tty
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# else
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# printf '%s' "$1" >/dev/tty
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# fi
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printf '%s' "$1" | perl -pe 's/\fNL/\r\n/g' >/dev/tty
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}
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replace_allchars() { (
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text=''
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for i in $(seq 1 ${#1})
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do
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text="$text$2"
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done
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printf '%s' "$text"
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) }
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if [ -n "$options_display" ]; then
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write_tty "$options_display"
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fi
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if [ "$options_displayOnly" = true ]; then
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printf "'%s'" ''
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exit 0
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fi
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if [ "$is_cooked" = true ]; then
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stty --file=/dev/tty cooked 2>/dev/null || \
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stty -F /dev/tty cooked 2>/dev/null || \
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stty -f /dev/tty cooked || exit $?
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else
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stty --file=/dev/tty raw -echo 2>/dev/null || \
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stty -F /dev/tty raw -echo 2>/dev/null || \
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stty -f /dev/tty raw -echo || exit $?
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fi
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[ "$options_keyIn" = true ] && req_size=1
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if [ "$options_keyIn" = true ] && [ -n "$options_limit" ]; then
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if [ "$options_caseSensitive" = true ]; then
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limit_ptn="$options_limit"
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else
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# Safe list
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# limit_ptn="$(printf '%s' "$options_limit" | sed 's/\([a-z]\)/\L\1\U\1/ig')"
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limit_ptn="$(printf '%s' "$options_limit" | perl -pe 's/([a-z])/lc($1) . uc($1)/ige')"
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fi
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fi
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while :
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do
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if [ "$is_cooked" != true ]; then
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# chunk="$(dd if=/dev/tty bs=1 count=1 2>/dev/null)"
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chunk="$(dd if=/dev/tty bs=1 count=1 2>/dev/null | perl -pe 's/[\r\n]/\fNL/g')"
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else
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IFS= read -r chunk </dev/tty || exit $?
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chunk="$(printf '%s\fNL' "$chunk")"
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fi
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# if [ -n "$chunk" ] && [ "$(printf '%s' "$chunk" | tr '\r' '\n' | wc -l)" != "0" ]; then
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# chunk="$(printf '%s' "$chunk" | tr '\r' '\n' | head -n 1)"
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if [ -n "$chunk" ] && printf '%s' "$chunk" | perl -ne '/\fNL/ or exit 1'; then
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chunk="$(printf '%s' "$chunk" | perl -pe 's/^(.*?)\fNL.*$/$1/')"
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at_eol=true
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fi
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# other ctrl-chars
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if [ -n "$chunk" ]; then
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# chunk="$(printf '%s' "$chunk" | tr -d '\00-\10\13\14\16-\37\177')"
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# for System V
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chunk="$(printf '%s' "$chunk" | tr -d '\00\01\02\03\04\05\06\07\10\13\14\16\17\20\21\22\23\24\25\26\27\30\31\32\33\34\35\36\37\177')"
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fi
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if [ -n "$chunk" ] && [ -n "$limit_ptn" ]; then
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chunk="$(printf '%s' "$chunk" | tr -cd "$limit_ptn")"
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fi
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if [ -n "$chunk" ]; then
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if [ "$is_cooked" != true ]; then
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if [ "$options_hideEchoBack" != true ]; then
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write_tty "$chunk"
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elif [ -n "$options_mask" ]; then
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write_tty "$(replace_allchars "$chunk" "$options_mask")"
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fi
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fi
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input="$input$chunk"
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fi
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if ( [ "$options_keyIn" != true ] && [ "$at_eol" = true ] ) || \
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( [ "$options_keyIn" = true ] && [ ${#input} -ge $req_size ] ); then break; fi
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done
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if [ "$is_cooked" != true ] && [ "$silent" != true ]; then write_tty "$(printf '%b' '\fNL')"; fi
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printf "'%s'" "$input"
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exit 0
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