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ohmyzsh/plugins/zsh-navigation-tools/n-list

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# $1, $2, ... - elements of the list
# $NLIST_NONSELECTABLE_ELEMENTS - array of indexes (1-based) that cannot be selected
# $REPLY is the output variable - contains index (1-based) or -1 when no selection
#
# Copy this file into /usr/share/zsh/site-functions/
# and add 'autoload n-list` to .zshrc
#
# This function outputs a list of elements that can be
# navigated with keyboard. Uses curses library
emulate -LR zsh
setopt typesetsilent extendedglob noshortloops
_nlist_has_terminfo=0
zmodload zsh/curses
zmodload zsh/terminfo 2>/dev/null && _nlist_has_terminfo=1
trap "REPLY=-2; reply=(); return" TERM INT QUIT
trap "_nlist_exit" EXIT
# Drawing and input
autoload n-list-draw n-list-input
# Cleanup before any exit
_nlist_exit() {
setopt localoptions
setopt extendedglob
[[ "$REPLY" = -(#c0,1)[0-9]## ]] || REPLY="-1"
zcurses 2>/dev/null delwin inner
zcurses 2>/dev/null delwin main
zcurses 2>/dev/null refresh
zcurses end
_nlist_alternate_screen 0
_nlist_cursor_visibility 1
unset _nlist_has_terminfo
}
# Outputs a message in the bottom of the screen
_nlist_status_msg() {
# -1 for border, -1 for 0-based indexing
zcurses move main $(( term_height - 1 - 1 )) 2
zcurses clear main eol
zcurses string main "$1"
#status_msg_strlen is localized in caller
status_msg_strlen=$#1
}
# Prefer tput, then module terminfo
_nlist_cursor_visibility() {
if type tput 2>/dev/null 1>&2; then
[ "$1" = "1" ] && { tput cvvis; tput cnorm }
[ "$1" = "0" ] && tput civis
elif [ "$_nlist_has_terminfo" = "1" ]; then
[ "$1" = "1" ] && { [ -n $terminfo[cvvis] ] && echo -n $terminfo[cvvis];
[ -n $terminfo[cnorm] ] && echo -n $terminfo[cnorm] }
[ "$1" = "0" ] && [ -n $terminfo[civis] ] && echo -n $terminfo[civis]
fi
}
# Reason for this function is that on some systems
# smcup and rmcup are not knowing why left empty
_nlist_alternate_screen() {
[ "$_nlist_has_terminfo" -ne "1" ] && return
[[ "$1" = "1" && -n "$terminfo[smcup]" ]] && return
[[ "$1" = "0" && -n "$terminfo[rmcup]" ]] && return
case "$TERM" in
*rxvt*)
[ "$1" = "1" ] && echo -n $'\x1b7\x1b[?47h'
[ "$1" = "0" ] && echo -n $'\x1b[2J\x1b[?47l\x1b8'
;;
*)
[ "$1" = "1" ] && echo -n $'\x1b[?1049h'
[ "$1" = "0" ] && echo -n $'\x1b[?1049l'
# just to remember two other that work: $'\x1b7\x1b[r\x1b[?47h', $'\x1b[?47l\x1b8'
;;
esac
}
_nlist_compute_user_vars_difference() {
if [[ "${(t)NLIST_NONSELECTABLE_ELEMENTS}" != "array" &&
"${(t)NLIST_NONSELECTABLE_ELEMENTS}" != "array-local" ]]
then
last_element_difference=0
current_difference=0
else
last_element_difference=$#NLIST_NONSELECTABLE_ELEMENTS
current_difference=0
local idx
for idx in "${(n)NLIST_NONSELECTABLE_ELEMENTS[@]}"; do
[ "$idx" -le "$NLIST_CURRENT_IDX" ] && current_difference+=1 || break
done
fi
}
# List was processed, check if variables aren't off range
_nlist_verify_vars() {
[ "$NLIST_CURRENT_IDX" -gt "$last_element" ] && NLIST_CURRENT_IDX="$last_element"
[[ "$NLIST_CURRENT_IDX" -eq 0 && "$last_element" -ne 0 ]] && NLIST_CURRENT_IDX=1
(( NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN=0+((NLIST_CURRENT_IDX-1)/page_height)*page_height+1 ))
}
# Compute the variables which are shown to the user
_nlist_setup_user_vars() {
if [ "$1" = "1" ]; then
# Basic values when there are no non-selectables
NLIST_USER_CURRENT_IDX="$NLIST_CURRENT_IDX"
NLIST_USER_LAST_ELEMENT="$last_element"
else
_nlist_compute_user_vars_difference
NLIST_USER_CURRENT_IDX=$(( NLIST_CURRENT_IDX - current_difference ))
NLIST_USER_LAST_ELEMENT=$(( last_element - last_element_difference ))
fi
}
_nlist_coloring_list_into_col_list() {
local col=$'\x1b[00;34m' reset=$'\x1b[0m'
[ -n "$NLIST_COLORING_COLOR" ] && col="$NLIST_COLORING_COLOR"
[ -n "$NLIST_COLORING_END_COLOR" ] && reset="$NLIST_COLORING_END_COLOR"
if [ "$NLIST_COLORING_MATCH_MULTIPLE" -eq 1 ]; then
col_list=( "${(@)list//(#mi)$~NLIST_COLORING_PATTERN/$col${MATCH}$reset}" )
else
col_list=( "${(@)list/(#mi)$~NLIST_COLORING_PATTERN/$col${MATCH}$reset}" )
fi
}
#
# Main code
#
# Check if there is proper input
if [ "$#" -lt 1 ]; then
echo "Usage: n-list element_1 ..."
return 1
fi
REPLY="-1"
typeset -ga reply
reply=()
integer term_height="$LINES"
integer term_width="$COLUMNS"
if [[ "$term_height" -lt 1 || "$term_width" -lt 1 ]]; then
local stty_out=$( stty size )
term_height="${stty_out% *}"
term_width="${stty_out#* }"
fi
integer inner_height=term_height-3
integer inner_width=term_width-3
integer page_height=inner_height
integer page_width=inner_width
typeset -a list col_list disp_list
integer last_element=$#
local action
local final_key
integer selection
integer last_element_difference=0
integer current_difference=0
local prev_search_buffer=""
integer prev_uniq_mode=0
integer prev_start_idx=-1
# Ability to remember the list between calls
if [[ -z "$NLIST_REMEMBER_STATE" || "$NLIST_REMEMBER_STATE" -eq 0 || "$NLIST_REMEMBER_STATE" -eq 2 ]]; then
NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN=1
NLIST_CURRENT_IDX=1
NLIST_IS_SEARCH_MODE=0
NLIST_SEARCH_BUFFER=""
NLIST_TEXT_OFFSET=0
NLIST_IS_UNIQ_MODE=0
# Zero - because it isn't known, unless we
# confirm that first element is selectable
NLIST_USER_CURRENT_IDX=0
[[ ${NLIST_NONSELECTABLE_ELEMENTS[(r)1]} != 1 ]] && NLIST_USER_CURRENT_IDX=1
NLIST_USER_LAST_ELEMENT=$(( last_element - $#NLIST_NONSELECTABLE_ELEMENTS ))
# 2 is init once, then remember
[ "$NLIST_REMEMBER_STATE" -eq 2 ] && NLIST_REMEMBER_STATE=1
fi
if [ "$NLIST_START_IN_SEARCH_MODE" -eq 1 ]; then
NLIST_START_IN_SEARCH_MODE=0
NLIST_IS_SEARCH_MODE=1
fi
if [ -n "$NLIST_SET_SEARCH_TO" ]; then
NLIST_SEARCH_BUFFER="$NLIST_SET_SEARCH_TO"
NLIST_SET_SEARCH_TO=""
fi
if [ "$NLIST_START_IN_UNIQ_MODE" -eq 1 ]; then
NLIST_START_IN_UNIQ_MODE=0
NLIST_IS_UNIQ_MODE=1
fi
_nlist_alternate_screen 1
zcurses init
zcurses delwin main 2>/dev/null
zcurses delwin inner 2>/dev/null
zcurses addwin main "$term_height" "$term_width" 0 0
zcurses addwin inner "$inner_height" "$inner_width" 1 2
zcurses bg main white/black
zcurses bg inner white/black
if [ "$NLIST_IS_SEARCH_MODE" -ne 1 ]; then
_nlist_cursor_visibility 0
fi
#
# Listening for input
#
local key keypad
# Clear input buffer
zcurses timeout main 0
zcurses input main key keypad
zcurses timeout main -1
key=""
keypad=""
list=( "$@" )
last_element="$#list"
integer is_colored=0
if [[ -z "$NLIST_SEARCH_BUFFER" && -n "$NLIST_COLORING_PATTERN" ]]; then
is_colored=1
_nlist_coloring_list_into_col_list
fi
while (( 1 )); do
# Do searching (filtering with string)
if [ -n "$NLIST_SEARCH_BUFFER" ]; then
# Compute new list, col_list ?
if [[ "$NLIST_SEARCH_BUFFER" != "$prev_search_buffer" || "$NLIST_IS_UNIQ_MODE" -ne "$prev_uniq_mode" ]]; then
prev_search_buffer="$NLIST_SEARCH_BUFFER"
prev_uniq_mode="$NLIST_IS_UNIQ_MODE"
# regenerating list -> regenerating disp_list
prev_start_idx=-1
# Take all elements, including duplicates and non-selectables
typeset +U list
list=( "$@" )
# Remove non-selectable elements
[ "$#NLIST_NONSELECTABLE_ELEMENTS" -gt 0 ] && for i in "${(nO)NLIST_NONSELECTABLE_ELEMENTS[@]}"; do
list[$i]=()
done
# Remove duplicates
[ "$NLIST_IS_UNIQ_MODE" -eq 1 ] && typeset -U list
last_element="$#list"
# Next do the filtering
local search_buffer="${NLIST_SEARCH_BUFFER%% ##}"
search_buffer="${search_buffer## ##}"
search_buffer="${search_buffer//(#m)[][*?|#~^()><\\]/\\$MATCH}"
if [ -n "$search_buffer" ]; then
# Patterns will be *foo*~^*bar* and foo|bar)
local search_pattern="${search_buffer// ##/*~^*}"
local colsearch_pattern="${search_buffer// ##/|}"
list=( "${(@M)list:#(#i)*$~search_pattern*}" )
last_element="$#list"
local red=$'\x1b[00;31m' reset=$'\x1b[00;00m'
col_list=( "${(@)list//(#mi)($~colsearch_pattern)/$red${MATCH}$reset}" )
else
col_list=( "$list[@]" )
fi
# Called after processing list
_nlist_verify_vars
fi
_nlist_setup_user_vars 1
integer end_idx=$(( NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN + page_height - 1 ))
[ "$end_idx" -gt "$last_element" ] && end_idx=last_element
if [ "$prev_start_idx" -ne "$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN" ]; then
prev_start_idx="$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN"
disp_list=( "${(@)col_list[NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN, end_idx]}" )
# We have display list, lets replace newlines with "\n" when needed (1/3)
[ "$NLIST_REPLACE_NEWLINES" -eq 1 ] && disp_list=( "${(@)disp_list//$'\n'/\\n}" )
fi
# Output colored list
n-list-draw "$(( (NLIST_CURRENT_IDX-1) % page_height + 1 ))" \
"$page_height" "$page_width" 0 0 "$NLIST_TEXT_OFFSET" inner \
"$disp_list[@]"
else
# There is no search, but there was in previous loop
# OR
# Uniq mode was entered or left out
# -> compute new list (maybe also col_list)
if [[ -n "$prev_search_buffer" || "$NLIST_IS_UNIQ_MODE" -ne "$prev_uniq_mode" ]]; then
prev_search_buffer=""
prev_uniq_mode="$NLIST_IS_UNIQ_MODE"
# regenerating list -> regenerating disp_list
prev_start_idx=-1
# Take all elements, including duplicates and non-selectables
typeset +U list
list=( "$@" )
# Remove non-selectable elements only when in uniq mode
[ "$NLIST_IS_UNIQ_MODE" -eq 1 ] && [ "$#NLIST_NONSELECTABLE_ELEMENTS" -gt 0 ] &&
for i in "${(nO)NLIST_NONSELECTABLE_ELEMENTS[@]}"; do
list[$i]=()
done
# Remove duplicates when in uniq mode
[ "$NLIST_IS_UNIQ_MODE" -eq 1 ] && typeset -U list
# Apply coloring pattern (when not with search query)
is_colored=0
if [ -n "$NLIST_COLORING_PATTERN" ]; then
is_colored=1
_nlist_coloring_list_into_col_list
fi
last_element="$#list"
# Called after processing list
_nlist_verify_vars
fi
# "1" - shouldn't bother with non-selectables
_nlist_setup_user_vars "$NLIST_IS_UNIQ_MODE"
integer end_idx=$(( NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN + page_height - 1 ))
[ "$end_idx" -gt "$last_element" ] && end_idx=last_element
if [ "$is_colored" -eq 0 ]; then
if [ "$prev_start_idx" -ne "$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN" ]; then
prev_start_idx="$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN"
disp_list=( "${(@)list[NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN, end_idx]}" )
# We have display list, lets replace newlines with "\n" when needed (2/3)
[ "$NLIST_REPLACE_NEWLINES" -eq 1 ] && disp_list=( "${(@)disp_list//$'\n'/\\n}" )
fi
else
if [ "$prev_start_idx" -ne "$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN" ]; then
prev_start_idx="$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN"
disp_list=( "${(@)col_list[NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN, end_idx]}" )
# We have display list, lets replace newlines with "\n" when needed (3/3)
[ "$NLIST_REPLACE_NEWLINES" -eq 1 ] && disp_list=( "${(@)disp_list//$'\n'/\\n}" )
fi
fi
# Output the list
n-list-draw "$(( (NLIST_CURRENT_IDX-1) % page_height + 1 ))" \
"$page_height" "$page_width" 0 0 "$NLIST_TEXT_OFFSET" inner \
"$disp_list[@]"
fi
local status_msg_strlen
if [ "$NLIST_IS_SEARCH_MODE" = "1" ]; then
local _txt2=""
[ "$NLIST_IS_UNIQ_MODE" -eq 1 ] && _txt2="[-UNIQ-] "
_nlist_status_msg "${_txt2}Filtering with: ${NLIST_SEARCH_BUFFER// /+}"
elif [[ ${NLIST_NONSELECTABLE_ELEMENTS[(r)$NLIST_CURRENT_IDX]} != $NLIST_CURRENT_IDX ||
-n "$NLIST_SEARCH_BUFFER" || "$NLIST_IS_UNIQ_MODE" -eq 1 ]]; then
local _txt="" _txt2=""
[ -n "$NLIST_GREP_STRING" ] && _txt=" [$NLIST_GREP_STRING]"
[ "$NLIST_IS_UNIQ_MODE" -eq 1 ] && _txt2="[-UNIQ-] "
_nlist_status_msg "${_txt2}Current #$NLIST_USER_CURRENT_IDX (of #$NLIST_USER_LAST_ELEMENT entries)$_txt"
else
_nlist_status_msg ""
fi
zcurses border main
zcurses refresh main inner
zcurses move main $(( term_height - 1 - 1 )) $(( status_msg_strlen + 2 ))
# Wait for input
zcurses input main key keypad
# Get the special (i.e. "keypad") key or regular key
if [ -n "$key" ]; then
final_key="$key"
elif [ -n "$keypad" ]; then
final_key="$keypad"
else
_nlist_status_msg "Inproper input detected"
zcurses refresh main inner
fi
n-list-input "$NLIST_CURRENT_IDX" "$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN" \
"$page_height" "$page_width" "$last_element" "$NLIST_TEXT_OFFSET" \
"$final_key" "$NLIST_IS_SEARCH_MODE" "$NLIST_SEARCH_BUFFER" \
"$NLIST_IS_UNIQ_MODE"
selection="$reply[1]"
action="$reply[2]"
NLIST_CURRENT_IDX="$reply[3]"
NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN="$reply[4]"
NLIST_TEXT_OFFSET="$reply[5]"
NLIST_IS_SEARCH_MODE="$reply[6]"
NLIST_SEARCH_BUFFER="$reply[7]"
NLIST_IS_UNIQ_MODE="$reply[8]"
if [ "$action" = "SELECT" ]; then
REPLY="$selection"
reply=( "$list[@]" )
break
elif [ "$action" = "QUIT" ]; then
REPLY=-1
reply=( "$list[@]" )
break
elif [ "$action" = "REDRAW" ]; then
zcurses clear main redraw
zcurses clear inner redraw
fi
done
# vim: set filetype=zsh:
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