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ohmyzsh/plugins/zsh-navigation-tools/doc/n-preview
Philipp Schmitt 068feca15d
feat(zsh-navigation-tools)!: update to zdharma-continuum fork (#10402)
BREAKING CHANGE: the `zsh-navigation-tools` plugin now bundles the version from the
zdharma-continuum project, which republished the projects that psprint deleted (we
don't yet know yet why). In theory this change doesn't break anything, but be aware
of the change and that the upstream repository now lives somewhere else.

Source: https://github.com/zdharma-continuum/zsh-navigation-tools/commit/67b24e1
2021-12-24 18:09:01 +01:00

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# Copy this file into /usr/share/zsh/site-functions/
# and add 'autoload n-preview` to .zshrc
#
# This is partially a test if n-list-draw and n-list-input can be
# used multiple times to create multiple lists. It might become
# more usable if someone adds more features like previewing of
# archive contents.
emulate -L zsh
zmodload zsh/curses
setopt typesetsilent extendedglob
trap "return" TERM INT QUIT
trap "_vpreview_exit" EXIT
local IFS="
"
[ -f ~/.config/znt/n-list.conf ] && . ~/.config/znt/n-list.conf
[[ "$colorpair" = "" ]] && colorpair="white/black"
local background="${colorpair#*/}"
# Drawing and input
autoload n-list-draw n-list-input
# Cleanup before any exit
_vpreview_exit() {
zcurses 2>/dev/null delwin files
zcurses 2>/dev/null delwin body
zcurses 2>/dev/null delwin status
zcurses 2>/dev/null refresh
zcurses end
}
# Outputs a message in the bottom of the screen
_vpreview_status_msg() {
zcurses move status 1 2
zcurses clear status eol
zcurses string status "$1"
}
# Prefer tput, then module terminfo
_nlist_cursor_visibility() {
if type tput 2>/dev/null 1>&2; then
[ "$1" = "1" ] && tput cvvis
[ "$1" = "0" ] && tput civis
elif [ "$has_termcap" = "1" ]; then
[ "$1" = "1" ] && [ -n $terminfo[cvvis] ] && echo -n $terminfo[cvvis]
[ "$1" = "0" ] && [ -n $terminfo[civis] ] && echo -n $terminfo[civis]
fi
}
#
# Main code
#
integer term_height="$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 status_height=3
integer status_width=term_width
integer status_page_height=1
integer status_page_width=term_width-2
integer files_height=term_height-status_height
integer files_width=term_width/5
integer files_page_height=files_height-2
integer files_page_width=files_width-2
integer body_height=term_height-status_height
integer body_width=term_width-files_width
integer body_page_height=body_height-2
integer body_page_width=body_width
integer _from_what_idx_list_is_shown_1=1
integer current_1=1
integer _from_what_idx_list_is_shown_2=1
integer current_2=1
integer hscroll_2=0
integer active_window=0
local ansi_mode="ansi"
[ -f ~/.config/znt/n-preview.conf ] && . ~/.config/znt/n-preview.conf
typeset -a hcmd
#if type pygmentize 2>/dev/null 1>&2; then
# hcmd=( pygmentize -g )
if type highlight 2>/dev/null 1>&2; then
hcmd=( highlight -q --force -O ansi )
elif type source-highlight 2>/dev/null 1>&2; then
# Warning: source-highlight can have problems
hcmd=( source-highlight --failsafe -fesc -o STDOUT -i )
else
ansi_mode="noansi"
fi
zcurses init
zcurses addwin status "$status_height" "$status_width" $(( term_height - status_height )) 0
zcurses addwin files "$files_height" "$files_width" 0 0
zcurses addwin body "$body_height" "$body_width" 0 "$files_width"
zcurses bg status white/black
zcurses bg files white/black
zcurses bg body white/black
#
# Listening for input
#
local key keypad
# Clear input buffer
zcurses timeout status 0
zcurses input status key keypad
zcurses timeout status -1
key=""
keypad=""
typeset -a filenames
integer last_element_1
typeset -a body
integer last_element_2
filenames=( *(N) )
filenames=( "${(@M)filenames:#(#i)*$1*}" )
local NLIST_GREP_STRING="$1"
integer last_element_1="$#filenames"
integer last_element_2=0
local selection action final_key
while (( 1 )); do
# Output the lists
integer end_idx=$(( _from_what_idx_list_is_shown_1 + files_page_height - 1 ))
[ "$end_idx" -gt "$last_element_1" ] && end_idx=last_element_1
n-list-draw "$(( (current_1 -1) % files_page_height + 1 ))" \
"$files_page_height" "$files_page_width" 1 2 0 files \
"${(@)filenames[_from_what_idx_list_is_shown_1, end_idx]}"
if [ "$#body" -ge 1 ]; then
end_idx=$(( _from_what_idx_list_is_shown_2 + body_page_height - 1 ))
[ "$end_idx" -gt "$last_element_2" ] && end_idx=last_element_2
n-list-draw "$(( (current_2 -1) % body_page_height + 1 ))" \
"$body_page_height" "$body_page_width" 1 0 "$hscroll_2" body \
"${(@)body[_from_what_idx_list_is_shown_2, end_idx]}"
fi
[[ "$active_window" -eq 0 ]] && zcurses border files
zcurses border status
zcurses refresh files body status
# Wait for input
zcurses input status key keypad
# Get the special (i.e. "keypad") key or regular key
if [ -n "$key" ]; then
final_key="$key"
elif [ -n "$keypad" ]; then
final_key="$keypad"
else
_vpreview_status_msg "Inproper input detected"
zcurses refresh status
fi
if [ "$active_window" -eq 0 ]; then
zcurses clear files
n-list-input "$current_1" "$_from_what_idx_list_is_shown_1" "$files_page_height" \
"$files_page_width" "$last_element_1" 0 "$final_key"
selection="$reply[1]"
action="$reply[2]"
current_1="$reply[3]"
_from_what_idx_list_is_shown_1="$reply[4]"
if [ "$action" = "SELECT" ]; then
# Load new file and refresh the displaying window
local filename="$filenames[$selection]"
if [ "$ansi_mode" = "ansi" ]; then
body=( "${(@f)"$( "$hcmd[@]" "$filename" )"}" )
else
body=( "${(@f)"$(<$filename)"}" )
fi
last_element_2="$#body"
current_2=1
_from_what_idx_list_is_shown_2=1
zcurses clear body
fi
elif [ "$active_window" -eq 1 ]; then
zcurses clear body
n-list-input "$current_2" "$_from_what_idx_list_is_shown_2" "$body_page_height" \
"$body_page_width" "$last_element_2" "$hscroll_2" "$final_key"
selection="$reply[1]"
action="$reply[2]"
current_2="$reply[3]"
_from_what_idx_list_is_shown_2="$reply[4]"
hscroll_2="$reply[5]"
fi
if [ "$action" = "LEAVE" ]; then
active_window=1-active_window
elif [ "$action" = "QUIT" ]; then
break
elif [ "$action" = "REDRAW" ]; then
zcurses clear files redraw
zcurses clear body redraw
zcurses clear status redraw
fi
done
# vim: set filetype=zsh: