bat/tests/syntax-tests/highlighted/dash/shfm

#!/usr/bin/env dash
 
esc() {
case $1 in
# vt100 (IL is vt102) (DECTCEM is vt520)
CUD) printf '%s[%sB' "$esc_c" "$2" ;; # cursor down
CUP) printf '%s[%s;%sH' "$esc_c" "$2" "$3" ;; # cursor home
CUU) printf '%s[%sA' "$esc_c" "$2" ;; # cursor up
DECAWM) printf '%s[?7%s' "$esc_c" "$2" ;; # line wrap
DECRC) printf '%s8' "$esc_c" ;; # cursor restore
DECSC) printf '%s7' "$esc_c" ;; # cursor save
DECSTBM) printf '%s[%s;%sr' "$esc_c" "$2" "$3" ;; # scroll region
DECTCEM) printf '%s[?25%s' "$esc_c" "$2" ;; # cursor visible
ED[0-2]) printf '%s[%sJ' "$esc_c" "${1#ED}" ;; # clear screen
EL[0-2]) printf '%s[%sK' "$esc_c" "${1#EL}" ;; # clear line
IL) printf '%s[%sL' "$esc_c" "$2" ;; # insert line
SGR) printf '%s[%s;%sm' "$esc_c" "$2" "$3" ;; # colors
 
# xterm (since 1988, supported widely)
screen_alt) printf '%s[?1049%s' "$esc_c" "$2" ;; # alternate buffer
esac
}
 
term_setup() {
stty=$(stty -g)
stty -icanon -echo
esc screen_alt h
esc DECAWM l
esc DECTCEM l
esc ED2
esc DECSTBM 1 "$((LINES - 2))"
}
 
term_reset() {
esc DECAWM h >&2
esc DECTCEM h >&2
esc ED2 >&2
esc DECSTBM >&2
esc screen_alt l >&2
stty "$stty"
 
# needed for cd-on-exit
printf '%s\n' "$PWD" >&1
}
 
term_resize() {
# false-positive, behavior intentional, globbing is disabled.
# shellcheck disable=2046
{
set -f
set +f -- $(stty size)
}
 
LINES=$1 COLUMNS=$2
 
# space for status_line
bottom=$((LINES - 2))
}
 
term_scroll_down() {
case $((y - $#)) in
[0-9]*) return
esac
 
y=$((y + 1))
y2=$((y2 + 1 < bottom ? y2 + 1 : bottom))
 
line_print "$((y - 1))" "$@"
printf '\n'
line_print "$y" "$@"
status_line "$#"
}
 
term_scroll_up() {
case $y in
-*|0|1) return
esac
 
y=$((y - 1))
 
line_print "$((y + 1))" "$@"
 
case $y2 in
1) esc IL ;;
*) esc CUU; y2=$((y2 > 1 ? y2 - 1 : 1))
esac
 
line_print "$y" "$@"
status_line "$#"
}
 
cmd_run() {
stty "$stty"
esc DECTCEM h
esc DECSTBM
esc ED2
"$@" ||:
esc DECSTBM 1 "$((LINES - 2))"
esc DECTCEM l
stty -icanon -echo
hist=2
}
 
file_escape() {
tmp=$1 safe=
 
# loop over string char by char
while c=${tmp%"${tmp#?}"}; do
case $c in
'') return ;;
[[:cntrl:]]) safe=$safe\? ;;
*) safe=$safe$c ;;
esac
 
tmp=${tmp#?}
done
}
 
hist_search() {
hist=0 j=1
 
for file do
case ${PWD%%/}/$file in
"$old_pwd") y=$j y2=$((j > bottom ? mid : j)) cur=$file
esac
 
j=$((j + 1))
done
}
 
list_print() {
esc ED2
esc CUP
 
i=1
end=$((bottom + 1))
mid=$((bottom / 4 < 5 ? 1 : bottom / 4))
 
case $# in
1) [ -e "$1" ] || set -- empty
esac
 
case $hist in
2) # redraw after cmd run
shift "$((y > y2 ? y - y2 : 0))"
;;
 
1) # redraw after go-to-parent
hist_search "$@"
shift "$((y >= bottom ? y - mid : 0))"
;;
 
*) # everything else
shift "$((y >= bottom ? y - bottom : 0))"
;;
esac
 
for file do
case $i in
"$y2") esc SGR 0 7
esac
 
case $((i - end)) in
-*)
line_format "$file"
esc CUD
;;
esac
 
i=$((i + 1))
done
 
esc CUP "$((y > y2 ? y2 : y))"
}
 
redraw() {
list_print "$@"
status_line "$#"
}
 
status_line() {
esc DECSC
esc CUP "$LINES"
 
case $USER in
root) esc SGR 31 7 ;;
*) esc SGR 34 7 ;;
esac
 
printf '%*s\r%s ' "$COLUMNS" "" "($y/$1)"
 
case $ltype in
'') printf %s "$PWD" ;;
*) printf %s "$ltype"
esac
 
esc SGR 0 0
esc DECRC
}
 
prompt() {
esc DECSC
esc CUP "$LINES"
printf %s "$1"
esc DECTCEM h
esc EL0
 
case $2 in
r)
stty icanon echo
read -r ans ||:
stty -icanon -echo
;;
esac
 
esc DECRC
esc DECTCEM l
status_line "($y/$#) $PWD"
}
 
line_print() {
offset=$1
 
case $offset in
"$y") esc SGR 0 7
esac
 
shift "$offset"
 
case $offset in
"$y") cur=$1
esac
 
line_format "$1"
}
 
line_format() {
file_escape "$1"
[ -d "$1" ] && esc SGR 1 31
printf %s "$safe"
[ -d "$1" ] && printf /
esc SGR 0 0
esc EL0
printf '\r'
}
 
main() {
set -e
 
case $1 in
-h|--help)
printf 'shfm -[hv] <starting dir>\n'
exit 0
;;
 
-v|--version)
printf 'shfm 0.4.2\n'
exit 0
;;
 
*)
cd -- "${1:-"$PWD"}"
;;
esac
 
esc_c=$(printf '\033')
bs_char=$(printf '\177')
 
set -- *
cur=$1
 
term_resize
term_setup
 
trap 'term_reset' EXIT INT
trap 'term_resize; term_setup; y=1 y2=1; redraw "$@"' WINCH
 
y=1 y2=1
redraw "$@"
 
while key=$(dd ibs=1 count=1 2>/dev/null); do
case $key${esc:=0} in
k?|A2)
term_scroll_up "$@"
;;
 
j?|B2)
term_scroll_down "$@"
;;
 
l?|C2|"$esc") # ARROW RIGHT
if [ -d "$cur" ] && cd -- "$cur" >/dev/null 2>&1; then
set -- *
y=1 y2=1 cur=$1 ltype=
redraw "$@"
 
elif [ -e "$cur" ]; then
cmd_run "${SHFM_OPENER:="${EDITOR:=vi}"}" "$cur"
redraw "$@"
fi
;;
 
h?|D2|"$bs_char"?) # ARROW LEFT
old_pwd=$PWD
 
case $ltype in
'') cd .. || continue ;;
*) ltype= ;;
esac
 
set -- *
y=1 y2=1 cur=$1 hist=1
redraw "$@"
;;
 
g?)
case $y in
1) continue
esac
 
y=1 y2=1 cur=$1
redraw "$@"
;;
 
G?)
y=$#
y2=$(($# < bottom ? $# : bottom))
redraw "$@"
;;
 
.?)
case ${hidden:=1} in
1) hidden=0; set -- .* ;;
0) hidden=1; set -- *
esac
 
y=1 y2=1 cur=$1
redraw "$@"
;;
 
:?)
prompt "cd: " r
 
# false positive, behavior intentional
# shellcheck disable=2088
case $ans in
'~') ans=$HOME ;;
'~/'*) ans=$HOME/${ans#"~/"}
esac
 
cd -- "${ans:="$0"}" >/dev/null 2>&1|| continue
set -- *
y=1 y2=1 cur=$1
redraw "$@"
;;
 
/?)
prompt / r
 
# word splitting and globbing intentional
# shellcheck disable=2086
set -- $ans*
 
case $1$# in
"$ans*1") set -- 'no results'
esac
 
y=1 y2=1 cur=$1 ltype="search $PWD/$ans*"
redraw "$@"
status_line "$#"
;;
 
-?)
cd -- "$OLDPWD" >/dev/null 2>&1|| continue
set -- *
y=1 y2=1 cur=$1
redraw "$@"
;;
 
\~?)
cd || continue
set -- *
y=1 y2=1 cur=$1
redraw "$@"
;;
 
\!?)
export SHFM_LEVEL
SHFM_LEVEL=$((SHFM_LEVEL + 1))
cmd_run "${SHELL:=/bin/sh}"
redraw "$@"
;;
 
\??)
set -- 'j - down' \
'k - up' \
'l - open file or directory' \
'h - go up level' \
'g - go to top' \
'G - go to bottom' \
'q - quit' \
': - cd to <input>' \
'/ - search current directory <input>*' \
'- - go to last directory' \
'~ - go home' \
'! - spawn shell' \
'. - toggle hidden files' \
'? - show keybinds'
 
y=1 y2=1 cur=$1 ltype=keybinds
redraw "$@"
status_line "$#"
;;
 
q?) exit 0 ;;
 
# handle keys which emit escape sequences
"$esc_c"*) esc=1 ;;
'[1') esc=2 ;;
*) esc=0 ;;
esac
done
}
 
main "$@" >/dev/tty