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shortcuts for select-option

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q
2018-12-30 11:16:39 +02:00
parent 2e3b68e6cf
commit d9d3507da3
1 changed files with 97 additions and 53 deletions
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146
shell/select-option.sh
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@@ -7,11 +7,23 @@ function select_option {
printf -v nformat "%%%dd. " ${#optcount}
local max_opt=0
local multiselected=()
local choices=()
local shortcuts=()
local idx=0
local clean_opt
for opt; do
if [[ "${#opt}" -gt $max_opt ]]; then
max_opt=${#opt}
fi
multiselected+=(0)
if [[ "$opt" =~ ^\[.\]* ]]; then # choice starts with [x]
shortcuts+=( "${opt:1:1}" )
choices+=( "${opt:3}" )
else
shortcuts+=( "${opt:0:1}" )
choices+=( "$opt" )
fi
if [[ "${#choices[$idx]}" -gt $max_opt ]]; then
max_opt="${#choices[$idx]}"
fi
((idx++))
done
# little helpers for terminal print control and key input
@@ -20,20 +32,25 @@ function select_option {
cursor_blink_off() { printf "$ESC[?25l"; }
cursor_to() { printf "$ESC[$1;${2:-1}H"; }
if [[ $SELECT_MONOCHROME -eq 1 ]]; then
print_option() { printf " $ESC[30m%s $ESC[0m %s $ESC[30m%s$ESC[0m " "$2" "$1" "$3"; }
print_selected() { printf " $ESC[30m%s$ESC[0m{ $ESC[1m%s$ESC[0m }$ESC[30m%s$ESC[0m " "$2" "$1" "$3"; }
print_option() { printf " $ESC[30m%s $ESC[0m%s %s $ESC[30m%s$ESC[0m$ESC[K" "$1" "$2" "$3" "$4"; }
print_selected() { printf " $ESC[30m%s $ESC[0m%s{ $ESC[1m%s$ESC[0m } $ESC[30m%s$ESC[0m$ESC[K" "$1" "$2" "$3" "$4"; }
print_multiselected() { printf "$ESC[30;1m*$ESC[0m"; }
else
print_option() { printf " $ESC[30m%s $ESC[33m %s $ESC[0m $ESC[30m%s$ESC[0m " "$2" "$1" "$3"; }
print_selected() { printf " $ESC[30m%s$ESC[35;1m{$ESC[37;1m %s $ESC[0;35;1m}$ESC[0;30m%s$ESC[0m " "$2" "$1" "$3"; }
print_option() { printf " $ESC[30m%s $ESC[33m%s %s$ESC[0m $ESC[30m%s$ESC[0m$ESC[K" "$1" "$2" "$3" "$4"; }
print_selected() { printf " $ESC[30m%s $ESC[35;1m%s{ $ESC[37;1m%s$ESC[0;35;1m } $ESC[0;30m%s$ESC[0m$ESC[K" "$1" "$2" "$3" "$4"; }
print_multiselected() { printf "$ESC[32;1m*$ESC[0m"; }
fi
get_cursor_row() { IFS=';' read -sdR -p $'\E[6n' ROW COL; echo ${ROW#*[}; }
key_input() { read -s -n1 key1 2>/dev/null >&2
read -s -n2 -t 0.1 key2 2>/dev/null >&2
if [[ "$key1" =~ ^[0-9]+$ ]]; then
echo $key1; return;
local idx=$selected
while true; do
idx=$(( ($idx + 1) % $optcount ))
if [[ "$key1" = "${shortcuts[$idx]}" ]]; then
echo $idx; return;
fi
if [[ $idx -eq $selected ]]; then break; fi
done
if [[ $key1$key2 = $ESC[A ]]; then echo up; return; fi
if [[ $key1$key2 = $ESC[B ]]; then echo down; return; fi
if [[ $key1$key2 = $ESC[C ]]; then echo left; return; fi
@@ -64,15 +81,29 @@ function select_option {
cursor_blink_off
local selected=0
local bottomlength=$(( 10 + $max_opt ))
local multiselect_pos=6
if [[ $SELECT_NUMBERS -eq 1 ]]; then
bottomlength=$(( $bottomlength + 3 ))
multiselect_pos=$(( $multiselect_pos + 3 ))
fi
if [[ $SELECT_SHORTCUTS -eq 1 ]]; then
bottomlength=$(( $bottomlength + 3 ))
multiselect_pos=$(( $multiselect_pos + 3 ))
fi
while true; do
# print options by overwriting the last lines
local idx=0
local nidx
local shortcut
cursor_to $startrow
printf " $ESC[30m%s$ESC[0m" "$toprow"
if [ $selected -lt 0 ]; then selected=$(($# - 1)); fi
if [ $selected -ge $# ]; then selected=0; fi
printf " $ESC[30m%s$ESC[0m$ESC[K " "$toprow"
for opt; do
opt="${choices[$idx]}"
local lborder="${lborderchars:$idx:1}"
if [ -z "$lborder" ]; then lborder=" "; fi
local rborder="${rborderchars:$(( $optcount - $idx - 1)):1}"
@@ -83,34 +114,37 @@ function select_option {
if [[ $SELECT_NUMBERS -eq 1 ]]; then
printf -v nidx "$nformat" $(( idx + 1 ))
fi
if [[ $SELECT_SHORTCUTS -eq 1 ]]; then
printf -v shortcut "%s) " "${shortcuts[$idx]}"
fi
printf -v padopt "%-${max_opt}s" "$opt"
cursor_to $(($startrow + $idx + 1))
if [ $idx -eq $selected ]; then
print_selected "$nidx$padopt" "$lborder" "$rborder"
print_selected "$lborder" "$nidx$shortcut" "$padopt" "$rborder"
else
print_option "$nidx$padopt" "${lborder}" "$rborder"
print_option "$lborder" "$nidx$shortcut" "$padopt" "$rborder"
fi
if (( ${multiselected[$idx]} )); then
cursor_to $(($startrow + $idx + 1)) 5
cursor_to $(($startrow + $idx + 1)) $multiselect_pos
print_multiselected
fi
((idx++))
done
cursor_to $(($startrow + $idx + 1))
local bottomlength=$(( 8 + $max_opt + ${#nidx} ))
printf "$ESC[30m%${bottomlength}s$ESC[0m" "$bottomrow"
printf "$ESC[K$ESC[30m%${bottomlength}s$ESC[0m " "$bottomrow"
# user key control
local user_input=`key_input`
case "$user_input" in
enter) break;;
esc) reset_display; exit 1;;
up) ((selected--));
if [ $selected -lt 0 ]; then selected=$(($# - 1)); fi;;
down) ((selected++));
if [ $selected -ge $# ]; then selected=0; fi;;
multiselect) if (( $SELECT_MULTI )); then multiselected[$selected]=$(( 1 - ${multiselected[$selected]} )); fi;;
[0-9]) selected=$(( $user_input - 1 )) ;;
up) ((selected--));;
down) ((selected++));;
multiselect) if (( $SELECT_MULTI )); then
multiselected[$selected]=$(( 1 - ${multiselected[$selected]} ));
((selected++));
fi;;
?) selected=$user_input;;
esac
done
@@ -123,7 +157,7 @@ function select_option {
if [[ -n "$SELECT_TOFILE" ]]; then printf "" > "$SELECT_TOFILE"; fi
for opt; do
if (( ${multiselected[$idx]} )); then
if [[ -n "$SELECT_TOFILE" ]]; then echo "$opt" >> "$SELECT_TOFILE"; fi
if [[ -n "$SELECT_TOFILE" ]]; then echo "${choices[$idx]}" >> "$SELECT_TOFILE"; fi
returnvalue=$(( $returnvalue + 2**$idx ))
fi
((idx++))
@@ -132,12 +166,7 @@ function select_option {
# Single choice
returnvalue=$selected
if [[ -n "$SELECT_TOFILE" ]]; then
for opt; do
if [ $idx -eq $selected ]; then
echo "$opt" > "$SELECT_TOFILE"
fi
((idx++))
done
echo "${choices[$selected]}" > "$SELECT_TOFILE"
fi
fi
@@ -151,43 +180,49 @@ _help() {
echo "Select Option [Pure BASH]
Adapted from: https://unix.stackexchange.com/questions/146570/arrow-key-enter-menu
Usage: $SELF [-n] [--nc] [-o File] [-_] list of options
-n Numbered list
Usage: $SELF [-nms_] [--nc] [-o File] list of options
-n Show item number
-m Multiple choice selection. Note that only 7 options can be encoded
reliably in return value. Use File output for more options.
-s Show shortcuts
--nc No colors
-o File Save the choice(s) in a file.
-_ Print spaces instead of underscores, workaround for
shell arguments with spaces.
shell arguments containing spaces.
--package Special option to base64 encode this program, to be
used in your own programs
User interface:
Enter Select option
Esc / Ctrl-c Exit
x Multi-selection
other keys Shortcut, defaults to first letter of choice
Returns:
Single selection:
(10 + index) of selection (first option = 10)
1 if ctrl-c or ESC pressed
If output file is defined, choice is printed there.
- (10 + index) of selection (first option = 10)
- 1 if ctrl-c or ESC pressed
- If output file is defined, choice is printed there.
Multiple selection:
(10 + 2**index) encoded multiple values (no options = 10). See example.
1 if ctrl-c or ESC pressed
All choices separately in the output File.
- (10 + 2**index) encoded multiple values (no options = 10). See example.
- 1 if ctrl-c or ESC pressed
- All choices separately in the output File.
Example:
Single choice:
$SELF -n one two three
EC=\$?
[[ \$EC -lt 10 ]] && { echo Exited..; } || { echo You selected \$(( \$EC - 9 )); }
> $SELF -n one two three
> EC=\$?
> [[ \$EC -lt 10 ]] && { echo Exited..; } || { echo You selected \$(( \$EC - 9 )); }
Single choice with shortcuts, press 1 2 3 or c to move in the menu:
> $SELF -s [1]One [2]Two [3]Three [c]Cancel
Multi choice:
$SELF -m one two three four five six seven -o choice.txt
C=\$?; C=\$(( \$C - 10 ))
if (( \$C == 0 )); then printf 'No selection'; else printf 'Selections: '; fi
for b in 7 6 5 4 3 2 1 0; do
if (( \$C >= 2**\$b )); then printf '%d, ' \$(( \$b + 1 )); C=\$(( \$C - 2**\$b )); fi
done; printf '\\n'
> $SELF -m one two three four five six seven -o choice.txt
> C=\$?; C=\$(( \$C - 10 ))
> if (( \$C == 0 )); then printf 'No selection'; else printf 'Selections: '; fi
> for b in 7 6 5 4 3 2 1 0; do
> if (( \$C >= 2**\$b )); then printf '%d, ' \$(( \$b + 1 )); C=\$(( \$C - 2**\$b )); fi
> done; printf '\\n'
"
exit
@@ -203,6 +238,7 @@ _package_self() {
SELECT_MONOCHROME=0
SELECT_SHORTCUTS=0
SELECT_NUMBERS=0
SELECT_UNDERSCORES=0
SELECT_MULTI=0
@@ -210,14 +246,22 @@ SELECT_TOFILE=""
for (( i=1; i<=$#; i++ )); do
value=${!i}
j=$(( i + 1 ))
[[ "$value" = "-h" ]] && _help
[[ "$value" = "--help" ]] && _help
[[ "$value" = "--nc" ]] && { SELECT_MONOCHROME=1; continue; }
[[ "$value" = "-m" ]] && { SELECT_MULTI=1; continue; }
[[ "$value" = "-n" ]] && { SELECT_NUMBERS=1; continue; }
[[ "$value" = "-_" ]] && { SELECT_UNDERSCORES=1; continue; }
[[ "$value" = "-o" ]] && { SELECT_TOFILE="${!j}"; ((i++)); continue; }
[[ "$value" = "--package" ]] && { _package_self; exit; }
[[ "${value}" = "-"* ]] && {
[[ "$value" =~ -.*h ]] && { _help; }
[[ "$value" =~ -.*m ]] && { SELECT_MULTI=1; }
[[ "$value" =~ -.*s ]] && { SELECT_SHORTCUTS=1; }
[[ "$value" =~ -.*n ]] && { SELECT_NUMBERS=1; }
[[ "$value" =~ -.*_ ]] && { SELECT_UNDERSCORES=1; }
[[ "$value" =~ -.*o ]] && {
SELECT_TOFILE="${!j}"; ((i++));
[[ -z "$SELECT_TOFILE" ]] && { echo Output file name missing; exit 1; }
}
continue
}
opts+=( "$value" )
done