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authoryuzu-eva <stevenhu@web.de>2022-08-22 22:48:02 +0200
committeryuzu-eva <stevenhu@web.de>2022-08-22 22:48:02 +0200
commitb2abf7439ed3c8097bccd3f71f3f5410552ac7fe (patch)
treeb650fd81505e6d015e490cebf0aa9b4f0dba68c5 /.config/nnn/plugins/preview-tui
parent599e1315ce9be32944681ff4e88fc5afa8ae81b8 (diff)
switch from powerline to starship, added mpd & ncmpcpp configs. also using nnn now
Diffstat (limited to '.config/nnn/plugins/preview-tui')
-rwxr-xr-x.config/nnn/plugins/preview-tui481
1 files changed, 481 insertions, 0 deletions
diff --git a/.config/nnn/plugins/preview-tui b/.config/nnn/plugins/preview-tui
new file mode 100755
index 0000000..18791fd
--- /dev/null
+++ b/.config/nnn/plugins/preview-tui
@@ -0,0 +1,481 @@
+#!/usr/bin/env sh
+
+# Description: Terminal based file previewer
+#
+# Note: This plugin needs a "NNN_FIFO" to work. See man.
+#
+# Dependencies:
+# - Supports 5 independent methods to preview with:
+# - tmux (>=3.0), or
+# - kitty with allow_remote_control and listen_on set in kitty.conf, or
+# - QuickLook on WSL (https://github.com/QL-Win/QuickLook), or
+# - Windows Terminal (https://github.com/Microsoft/Terminal | https://aka.ms/terminal) with WSL, or
+# - $TERMINAL set to a terminal (it's xterm by default).
+# - less or $PAGER
+# - tree or exa or ls
+# - mediainfo or file
+# - mktemp
+# - unzip
+# - tar
+# - man
+# - optional: bsdtar or atool for additional archive preview
+# - optional: bat for code syntax highlighting
+# - optional: ueberzug, kitty terminal, viu or catimg for images
+# - optional: convert(ImageMagick) for playing gif preview (required for kitty image previews)
+# - optional: ffmpegthumbnailer for video thumbnails (https://github.com/dirkvdb/ffmpegthumbnailer)
+# - optional: ffmpeg for audio thumbnails
+# - optional: libreoffce for opendocument/officedocument preview
+# - optional: pdftoppm(poppler) for pdf thumbnails
+# - optional: gnome-epub-thumbnailer for epub thumbnails (https://gitlab.gnome.org/GNOME/gnome-epub-thumbnailer)
+# - optional: fontpreview for font preview (https://github.com/sdushantha/fontpreview)
+# - optional: djvulibre for djvu
+# - optional: glow or lowdown for markdown
+# - optional: w3m or lynx or elinks for html
+# - optional: set/export ICONLOOKUP as 1 to enable file icons in front of directory previews with .iconlookup
+# Icons and colors are configureable in .iconlookup
+# - optional: scope.sh file viewer from ranger.
+# 1. drop scope.sh executable in $PATH
+# 2. set/export $USE_SCOPE as 1
+# - optional: pistol file viewer (https://github.com/doronbehar/pistol).
+# 1. install pistol
+# 2. set/export $USE_PISTOL as 1
+#
+# Usage:
+# You need to set a NNN_FIFO path and a key for the plugin with NNN_PLUG,
+# then start `nnn`:
+#
+# $ nnn -a
+#
+# or
+#
+# $ NNN_FIFO=/tmp/nnn.fifo nnn
+#
+# Then launch the `preview-tui` plugin in `nnn`.
+#
+# If you provide the same NNN_FIFO to all nnn instances, there will be a
+# single common preview window. If you provide different FIFO path (e.g.
+# with -a), they will be independent.
+#
+# The previews will be shown in a tmux split. If that isn't possible, it
+# will try to use a kitty terminal split. And as a final fallback, a
+# different terminal window will be used ($TERMINAL).
+#
+# Tmux and kitty users can configure $SPLIT to either "h" or "v" to set a
+# 'h'orizontal split or a 'v'ertical split (as in, the line that splits the
+# windows will be horizontal or vertical).
+#
+# Kitty users need something similar to the following in their kitty.conf:
+# - `allow_remote_control yes`
+# - `listen_on unix:$TMPDIR/kitty`
+# - `enabled_layouts splits` (optional)
+# With ImageMagick installed, this terminal can use the icat kitten to display images.
+# Refer to kitty documentation for further details.
+#
+# Iterm2 users are recommended to use viu to view images without getting pixelated.
+#
+# Windows Terminal users can set "Profile termination behavior" under "Profile > Advanced" settings
+# to automaticaly close pane on quit when exit code is 0.
+#
+# Shell: POSIX compliant
+# Authors: Todd Yamakawa, Léo Villeveygoux, @Recidiviste, Mario Ortiz Manero, Luuk van Baal, @WanderLanz
+
+#SPLIT="$SPLIT" # you can set a permanent split here
+#TERMINAL="$TERMINAL" # same goes for the terminal
+SPLIT_SIZE="${SPLIT_SIZE:-50}" # split size in percentage for supported previewers
+USE_SCOPE="${USE_SCOPE:-0}"
+USE_PISTOL="${USE_PISTOL:-0}"
+ICONLOOKUP="${ICONLOOKUP:-0}"
+PAGER="${PAGER:-less -P?n -R}"
+TMPDIR="${TMPDIR:-/tmp}"
+BAT_STYLE="${BAT_STYLE:-numbers}"
+BAT_THEME="${BAT_THEME:-ansi}"
+# Consider setting NNN_PREVIEWDIR to $XDG_CACHE_HOME/nnn/previews if you want to keep previews on disk between reboots
+NNN_PREVIEWDIR="${NNN_PREVIEWDIR:-$TMPDIR/nnn/previews}"
+NNN_PREVIEWWIDTH="${NNN_PREVIEWWIDTH:-1920}"
+NNN_PREVIEWHEIGHT="${NNN_PREVIEWHEIGHT:-1080}"
+NNN_PARENT="${NNN_FIFO#*.}"
+[ "$NNN_PARENT" -eq "$NNN_PARENT" ] 2>/dev/null || NNN_PARENT=""
+FIFOPID="$TMPDIR/nnn-preview-tui-fifopid.$NNN_PARENT"
+PREVIEWPID="$TMPDIR/nnn-preview-tui-pagerpid.$NNN_PARENT"
+CURSEL="$TMPDIR/nnn-preview-tui-selection.$NNN_PARENT"
+FIFO_UEBERZUG="$TMPDIR/nnn-preview-tui-ueberzug-fifo.$NNN_PARENT"
+POSOFFSET="$TMPDIR/nnn-preview-tui-posoffset"
+
+exists() { type "$1" >/dev/null 2>&1 ;}
+pkill() { command pkill "$@" >/dev/null 2>&1 ;}
+pidkill() { [ -f "$1" ] && kill "$(cat "$1")" >/dev/null 2>&1 ;}
+prompt() { printf "%b" "$@"; cfg=$(stty -g); stty raw -echo; head -c 1; stty "$cfg" ;}
+
+start_preview() {
+ [ "$PAGER" = "most" ] && PAGER="less -R"
+
+ if [ -e "${TMUX%%,*}" ] && tmux -V | grep -q '[ -][3456789]\.'; then
+ TERMINAL=tmux
+ elif [ -n "$KITTY_LISTEN_ON" ]; then
+ TERMINAL=kitty
+ elif [ -z "$TERMINAL" ] && [ "$TERM_PROGRAM" = "iTerm.app" ]; then
+ TERMINAL=iterm
+ elif [ -n "$WT_SESSION" ]; then
+ TERMINAL=winterm
+ else
+ TERMINAL="${TERMINAL:-xterm}"
+ fi
+
+ if [ -z "$SPLIT" ] && [ $(($(tput lines) * 2)) -gt "$(tput cols)" ]; then
+ SPLIT='h'
+ elif [ "$SPLIT" != 'h' ]; then
+ SPLIT='v'
+ fi
+
+ case "$TERMINAL" in
+ tmux) # tmux splits are inverted
+ if [ "$SPLIT" = "v" ]; then DSPLIT="h"; else DSPLIT="v"; fi
+ tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -e "CURSEL=$CURSEL" \
+ -e "TMPDIR=$TMPDIR" -e "FIFOPID=$FIFOPID" -e "POSOFFSET=$POSOFFSET" \
+ -e "BAT_STYLE=$BAT_STYLE" -e "BAT_THEME=$BAT_THEME" -e "PREVIEWPID=$PREVIEWPID" \
+ -e "PAGER=$PAGER" -e "ICONLOOKUP=$ICONLOOKUP" -e "NNN_PREVIEWWIDTH=$NNN_PREVIEWWIDTH" \
+ -e "USE_SCOPE=$USE_SCOPE" -e "SPLIT=$SPLIT" -e "USE_PISTOL=$USE_PISTOL" \
+ -e "NNN_PREVIEWDIR=$NNN_PREVIEWDIR" -e "NNN_PREVIEWHEIGHT=$NNN_PREVIEWHEIGHT" \
+ -e "FIFO_UEBERZUG=$FIFO_UEBERZUG" -e "QLPATH=$2" -d"$DSPLIT" -p"$SPLIT_SIZE" "$0" "$1" ;;
+ kitty) # Setting the layout for the new window. It will be restored after the script ends.
+ kitty @ goto-layout splits
+ # Trying to use kitty's integrated window management as the split window. All
+ # environmental variables that will be used in the new window must be explicitly passed.
+ kitty @ launch --no-response --title "nnn preview" --keep-focus \
+ --cwd "$PWD" --env "PATH=$PATH" --env "NNN_FIFO=$NNN_FIFO" \
+ --env "PREVIEW_MODE=1" --env "PAGER=$PAGER" --env "TMPDIR=$TMPDIR" \
+ --env "USE_SCOPE=$USE_SCOPE" --env "SPLIT=$SPLIT" --env "TERMINAL=$TERMINAL"\
+ --env "PREVIEWPID=$PREVIEWPID" --env "FIFO_UEBERZUG=$FIFO_UEBERZUG" \
+ --env "ICONLOOKUP=$ICONLOOKUP" --env "NNN_PREVIEWHEIGHT=$NNN_PREVIEWHEIGHT" \
+ --env "NNN_PREVIEWWIDTH=$NNN_PREVIEWWIDTH" --env "NNN_PREVIEWDIR=$NNN_PREVIEWDIR" \
+ --env "USE_PISTOL=$USE_PISTOL" --env "BAT_STYLE=$BAT_STYLE" \
+ --env "BAT_THEME=$BAT_THEME" --env "FIFOPID=$FIFOPID" \
+ --env "CURSEL=$CURSEL" --location "${SPLIT}split" "$0" "$1" ;;
+ iterm)
+ command="$SHELL -c 'cd $PWD; \
+ PATH=\\\"$PATH\\\" NNN_FIFO=\\\"$NNN_FIFO\\\" PREVIEW_MODE=1 PAGER=\\\"$PAGER\\\" \
+ USE_SCOPE=\\\"$USE_SCOPE\\\" SPLIT=\\\"$SPLIT\\\" TERMINAL=\\\"$TERMINAL\\\" \
+ PREVIEWPID=\\\"$PREVIEWPID\\\" CURSEL=\\\"$CURSEL\\\" TMPDIR=\\\"$TMPDIR\\\" \
+ ICONLOOKUP=\\\"$ICONLOOKUP\\\" NNN_PREVIEWHEIGHT=\\\"$NNN_PREVIEWHEIGHT\\\" \
+ NNN_PREVIEWWIDTH=\\\"$NNN_PREVIEWWIDTH\\\" NNN_PREVIEWDIR=\\\"$NNN_PREVIEWDIR\\\" \
+ USE_PISTOL=\\\"$USE_PISTOL\\\" BAT_STYLE=\\\"$BAT_STYLE\\\" \
+ BAT_THEME=\\\"$BAT_THEME\\\" FIFOPID=\\\"$FIFOPID\\\" \\\"$0\\\" \\\"$1\\\"'"
+ if [ "$SPLIT" = "h" ]; then split="horizontally"; else split="vertically"; fi
+ osascript <<-EOF
+ tell application "iTerm"
+ tell current session of current window
+ split $split with default profile command "$command"
+ end tell
+ end tell
+EOF
+ ;;
+ winterm)
+ if [ "$SPLIT" = "h" ]; then split="H"; else split="V"; fi
+ cmd.exe /c wt -w 0 sp -$split -s$((SPLIT_SIZE / 100)) bash -c "cd $PWD \; \
+ PATH='$PATH' NNN_FIFO=$NNN_FIFO PREVIEW_MODE=1 CURSEL=$CURSEL TMPDIR=$TMPDIR \
+ FIFOPID=$FIFOPID BAT_STYLE=$BAT_STYLE BAT_THEME=$BAT_THEME PREVIEWPID=$PREVIEWPID \
+ PAGER='$PAGER' ICONLOOKUP=$ICONLOOKUP NNN_PREVIEWWIDTH=$NNN_PREVIEWWIDTH \
+ USE_SCOPE=$USE_SCOPE SPLIT=$SPLIT USE_PISTOL=$USE_PISTOL \
+ NNN_PREVIEWDIR=$NNN_PREVIEWDIR NNN_PREVIEWHEIGHT=$NNN_PREVIEWHEIGHT \
+ FIFO_UEBERZUG=$FIFO_UEBERZUG QLPATH=$2 $0 $1" \; -w 0 mf previous
+ ;;
+ *) if [ -n "$2" ]; then
+ QUICKLOOK=1 QLPATH="$2" PREVIEW_MODE=1 "$0" "$1" &
+ else
+ PREVIEWPID="$PREVIEWPID" CURSEL="$CURSEL" PREVIEW_MODE=1 \
+ FIFOPID="$FIFOPID" FIFO_UEBERZUG="$FIFO_UEBERZUG" $TERMINAL -e "$0" "$1" &
+ fi ;;
+ esac
+}
+
+toggle_preview() {
+ if exists QuickLook.exe; then
+ QLPATH="QuickLook.exe"
+ elif exists Bridge.exe; then
+ QLPATH="Bridge.exe"
+ fi
+ if pidkill "$FIFOPID"; then
+ [ -p "$NNN_PPIPE" ] && printf "0" > "$NNN_PPIPE"
+ pidkill "$PREVIEWPID"
+ pkill -f "tail --follow $FIFO_UEBERZUG"
+ if [ -n "$QLPATH" ] && stat "$1"; then
+ f="$(wslpath -w "$1")" && "$QLPATH" "$f" &
+ fi
+ else
+ [ -p "$NNN_PPIPE" ] && printf "1" > "$NNN_PPIPE"
+ start_preview "$1" "$QLPATH"
+ fi
+}
+
+fifo_pager() {
+ cmd="$1"
+ shift
+
+ # We use a FIFO to access $PAGER PID in jobs control
+ tmpfifopath="$TMPDIR/nnn-preview-tui-fifo.$$"
+ mkfifo "$tmpfifopath" || return
+
+ $PAGER < "$tmpfifopath" &
+ printf "%s" "$!" > "$PREVIEWPID"
+
+ (
+ exec > "$tmpfifopath"
+ if [ "$cmd" = "pager" ]; then
+ if exists bat; then
+ bat --terminal-width="$cols" --decorations=always --color=always \
+ --paging=never --style="$BAT_STYLE" --theme="$BAT_THEME" "$@" &
+ else
+ $PAGER "$@" &
+ fi
+ else
+ "$cmd" "$@" &
+ fi
+ )
+
+ rm "$tmpfifopath"
+}
+
+# Binary file: show file info inside the pager
+print_bin_info() {
+ printf -- "-------- \033[1;31mBinary file\033[0m --------\n"
+ if exists mediainfo; then
+ mediainfo "$1"
+ else
+ file -b "$1"
+ fi
+}
+
+handle_mime() {
+ case "$2" in
+ image/jpeg) image_preview "$cols" "$lines" "$1" ;;
+ image/gif) generate_preview "$cols" "$lines" "$1" "gif" ;;
+ image/vnd.djvu) generate_preview "$cols" "$lines" "$1" "djvu" ;;
+ image/*) generate_preview "$cols" "$lines" "$1" "image" ;;
+ video/*) generate_preview "$cols" "$lines" "$1" "video" ;;
+ audio/*) generate_preview "$cols" "$lines" "$1" "audio" ;;
+ application/font*|application/*opentype|font/*) generate_preview "$cols" "$lines" "$1" "font" ;;
+ */*office*|*/*document*) generate_preview "$cols" "$lines" "$1" "office" ;;
+ application/zip) fifo_pager unzip -l "$1" ;;
+ text/troff)
+ if exists man; then
+ fifo_pager man -Pcat -l "$1"
+ else
+ fifo_pager pager "$1"
+ fi ;;
+ *) handle_ext "$1" "$3" "$4" ;;
+ esac
+}
+
+handle_ext() {
+ case "$2" in
+ epub) generate_preview "$cols" "$lines" "$1" "epub" ;;
+ pdf) generate_preview "$cols" "$lines" "$1" "pdf" ;;
+ gz|bz2) fifo_pager tar -tvf "$1" ;;
+ md) if exists glow; then
+ fifo_pager glow -s dark "$1"
+ elif exists lowdown; then
+ fifo_pager lowdown -Tterm "$1"
+ else
+ fifo_pager pager "$1"
+ fi ;;
+ htm|html|xhtml)
+ if exists w3m; then
+ fifo_pager w3m "$1"
+ elif exists lynx; then
+ fifo_pager lynx "$1"
+ elif exists elinks; then
+ fifo_pager elinks "$1"
+ else
+ fifo_pager pager "$1"
+ fi ;;
+ 7z|a|ace|alz|arc|arj|bz|cab|cpio|deb|jar|lha|lz|lzh|lzma|lzo\
+ |rar|rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tZ|tzo|war|xpi|xz|Z)
+ if exists atool; then
+ fifo_pager atool -l "$1"
+ elif exists bsdtar; then
+ fifo_pager bsdtar -tvf "$1"
+ fi ;;
+ *) if [ "$3" = "bin" ]; then
+ fifo_pager print_bin_info "$1"
+ else
+ fifo_pager pager "$1"
+ fi ;;
+ esac
+}
+
+preview_file() {
+ clear
+ # Trying to use pistol if it's available.
+ if [ "$USE_PISTOL" -ne 0 ] && exists pistol; then
+ fifo_pager pistol "$1"
+ return
+ fi
+
+ # Trying to use scope.sh if it's available.
+ if [ "$USE_SCOPE" -ne 0 ] && exists scope.sh; then
+ fifo_pager scope.sh "$1" "$cols" "$lines" "$(mktemp -d)" "True"
+ return
+ fi
+
+ # Use QuickLook if it's available.
+ if [ -n "$QUICKLOOK" ]; then
+ stat "$1" && f="$(wslpath -w "$1")" && "$QLPATH" "$f" &
+ return
+ fi
+
+ # Detecting the exact type of the file: the encoding, mime type, and extension in lowercase.
+ encoding="$(file -bL --mime-encoding -- "$1")"
+ mimetype="$(file -bL --mime-type -- "$1")"
+ ext="${1##*.}"
+ [ -n "$ext" ] && ext="$(printf "%s" "${ext}" | tr '[:upper:]' '[:lower:]')"
+ lines=$(tput lines)
+ cols=$(tput cols)
+
+ # Otherwise, falling back to the defaults.
+ if [ -d "$1" ]; then
+ cd "$1" || return
+ if [ "$ICONLOOKUP" -ne 0 ] && [ -f "$(dirname "$0")"/.iconlookup ]; then
+ [ "$SPLIT" = v ] && BSTR="\n"
+ # shellcheck disable=SC2012
+ ls -F --group-directories-first | head -n "$((lines - 3))" | "$(dirname "$0")"/.iconlookup -l "$cols" -B "$BSTR" -b " "
+ elif exists tree; then
+ fifo_pager tree --filelimit "$(find . -maxdepth 1 | wc -l)" -L 3 -C -F --dirsfirst --noreport
+ elif exists exa; then
+ exa -G --group-directories-first --colour=always
+ else
+ fifo_pager ls -F --group-directories-first --color=always
+ fi
+ elif [ "${encoding#*)}" = "binary" ]; then
+ handle_mime "$1" "$mimetype" "$ext" "bin"
+ else
+ handle_mime "$1" "$mimetype" "$ext"
+ fi
+}
+
+generate_preview() {
+ if [ -n "$QLPATH" ] && stat "$3"; then
+ f="$(wslpath -w "$3")" && "$QLPATH" "$f" &
+ elif [ ! -f "$NNN_PREVIEWDIR/$3.jpg" ] || [ -n "$(find -L "$3" -newer "$NNN_PREVIEWDIR/$3.jpg")" ]; then
+ mkdir -p "$NNN_PREVIEWDIR/${3%/*}"
+ case $4 in
+ audio) ffmpeg -i "$3" -filter_complex "scale=iw*min(1\,min($NNN_PREVIEWWIDTH/iw\,ih)):-1" "$NNN_PREVIEWDIR/$3.jpg" -y ;;
+ epub) gnome-epub-thumbnailer "$3" "$NNN_PREVIEWDIR/$3.jpg" ;;
+ font) fontpreview -i "$3" -o "$NNN_PREVIEWDIR/$3.jpg" ;;
+ gif) if [ -p "$FIFO_UEBERZUG" ] && exists convert; then
+ frameprefix="$NNN_PREVIEWDIR/$3/${3##*/}"
+ if [ ! -d "$NNN_PREVIEWDIR/$3" ]; then
+ mkdir -p "$NNN_PREVIEWDIR/$3"
+ convert -coalesce -resize "$NNN_PREVIEWWIDTH"x"$NNN_PREVIEWHEIGHT"\> "$3" "$frameprefix.jpg" ||
+ MAGICK_TMPDIR="/tmp" convert -coalesce -resize "$NNN_PREVIEWWIDTH"x"$NNN_PREVIEWHEIGHT"\> "$3" "$frameprefix.jpg"
+ fi
+ frames=$(($(find "$NNN_PREVIEWDIR/$3" | wc -l) - 2))
+ [ $frames -lt 0 ] && return
+ while true; do
+ for i in $(seq 0 $frames); do
+ image_preview "$1" "$2" "$frameprefix-$i.jpg"
+ sleep 0.1
+ done
+ done &
+ printf "%s" "$!" > "$PREVIEWPID"
+ return
+ else
+ exec >/dev/tty
+ image_preview "$1" "$2" "$3"
+ return
+ fi ;;
+ image) if exists convert; then
+ convert "$3" -flatten -resize "$NNN_PREVIEWWIDTH"x"$NNN_PREVIEWHEIGHT"\> "$NNN_PREVIEWDIR/$3.jpg"
+ else
+ image_preview "$1" "$2" "$3" && return
+ fi ;;
+ office) libreoffice --convert-to jpg "$3" --outdir "$NNN_PREVIEWDIR/${3%/*}"
+ filename="$(printf "%s" "${3##*/}" | cut -d. -f1)"
+ mv "$NNN_PREVIEWDIR/${3%/*}/$filename.jpg" "$NNN_PREVIEWDIR/$3.jpg" ;;
+ pdf) pdftoppm -jpeg -f 1 -singlefile "$3" "$NNN_PREVIEWDIR/$3" ;;
+ djvu) ddjvu -format=ppm -page=1 "$3" "$NNN_PREVIEWDIR/$3.jpg" ;;
+ video) ffmpegthumbnailer -s0 -i "$3" -o "$NNN_PREVIEWDIR/$3.jpg" || rm "$NNN_PREVIEWDIR/$3.jpg" ;;
+ esac
+ fi
+ if [ -f "$NNN_PREVIEWDIR/$3.jpg" ]; then
+ image_preview "$1" "$2" "$NNN_PREVIEWDIR/$3.jpg"
+ else
+ fifo_pager print_bin_info "$3"
+ fi
+} >/dev/null 2>&1
+
+image_preview() {
+ clear
+ if [ "$TERMINAL" = "kitty" ]; then
+ # Kitty terminal users can use the native image preview method
+ kitty +kitten icat --silent --scale-up --place "$1"x"$2"@0x0 --transfer-mode=stream --stdin=no "$3" &
+ elif exists ueberzug; then
+ ueberzug_layer "$1" "$2" "$3" && return
+ elif exists catimg; then
+ catimg "$3" &
+ elif exists viu; then
+ viu -t "$3" &
+ else
+ fifo_pager print_bin_info "$3" && return
+ fi
+ printf "%s" "$!" > "$PREVIEWPID"
+}
+
+ueberzug_layer() {
+ [ -f "$POSOFFSET" ] && read -r x y < "$POSOFFSET"
+ printf '{"action": "add", "identifier": "nnn_ueberzug", "x": %d, "y": %d, "width": "%d", "height": "%d", "scaler": "fit_contain", "path": "%s"}\n'\
+ "${x:-0}" "${y:-0}" "$1" "$2" "$3" > "$FIFO_UEBERZUG"
+}
+
+ueberzug_remove() {
+ printf '{"action": "remove", "identifier": "nnn_ueberzug"}\n' > "$FIFO_UEBERZUG"
+}
+
+winch_handler() {
+ clear
+ pidkill "$PREVIEWPID"
+ if [ -p "$FIFO_UEBERZUG" ]; then
+ pkill -f "tail --follow $FIFO_UEBERZUG"
+ tail --follow "$FIFO_UEBERZUG" | ueberzug layer --silent --parser json &
+ fi
+ preview_file "$(cat "$CURSEL")"
+}
+
+preview_fifo() {
+ while read -r selection; do
+ if [ -n "$selection" ]; then
+ pidkill "$PREVIEWPID"
+ [ -p "$FIFO_UEBERZUG" ] && ueberzug_remove
+ [ "$selection" = "close" ] && break
+ preview_file "$selection"
+ printf "%s" "$selection" > "$CURSEL"
+ fi
+ done < "$NNN_FIFO"
+ sleep 0.1 # make sure potential preview by winch_handler is killed
+ pkill -P "$$"
+}
+
+if [ "$PREVIEW_MODE" ]; then
+ if [ "$TERMINAL" != "kitty" ] && exists ueberzug; then
+ mkfifo "$FIFO_UEBERZUG"
+ tail --follow "$FIFO_UEBERZUG" | ueberzug layer --silent --parser json &
+ fi
+
+ preview_file "$PWD/$1"
+ preview_fifo &
+ printf "%s" "$!" > "$FIFOPID"
+ printf "%s" "$PWD/$1" > "$CURSEL"
+ trap 'winch_handler; wait' WINCH
+ trap 'rm "$PREVIEWPID" "$CURSEL" "$FIFO_UEBERZUG" "$FIFOPID" "$POSOFFSET" 2>/dev/null' INT HUP EXIT
+ wait "$!" 2>/dev/null
+ exit 0
+else
+ if [ ! -r "$NNN_FIFO" ]; then
+ clear
+ prompt "No FIFO available! (\$NNN_FIFO='$NNN_FIFO')\nPlease read Usage in preview-tui."
+ elif [ "$KITTY_WINDOW_ID" ] && [ -z "$TMUX" ] && [ -z "$KITTY_LISTEN_ON" ]; then
+ clear
+ prompt "\$KITTY_LISTEN_ON not set!\nPlease read Usage in preview-tui."
+ else
+ toggle_preview "$1" &
+ fi
+fi