preview-tui (19888B)
1 #!/usr/bin/env sh 2 3 # Description: Terminal based file previewer 4 # 5 # Note: This plugin needs a "NNN_FIFO" to work. See man. 6 # 7 # Dependencies: 8 # - Supports 5 independent methods to preview with: 9 # - tmux (>=3.0), or 10 # - kitty with allow_remote_control and listen_on set in kitty.conf, or 11 # - QuickLook on WSL (https://github.com/QL-Win/QuickLook), or 12 # - Windows Terminal (https://github.com/Microsoft/Terminal | https://aka.ms/terminal) with WSL, or 13 # - $TERMINAL set to a terminal (it's xterm by default). 14 # - less or $PAGER 15 # - tree or exa or ls 16 # - mediainfo or file 17 # - mktemp 18 # - unzip 19 # - tar 20 # - man 21 # - optional: bsdtar or atool for additional archive preview 22 # - optional: bat for code syntax highlighting 23 # - optional: ueberzug, kitty terminal, viu or catimg for images 24 # - optional: convert(ImageMagick) for playing gif preview 25 # - optional: ffmpegthumbnailer for video thumbnails (https://github.com/dirkvdb/ffmpegthumbnailer) 26 # - optional: ffmpeg for audio thumbnails 27 # - optional: libreoffce for opendocument/officedocument preview 28 # - optional: pdftoppm(poppler) for pdf thumbnails 29 # - optional: gnome-epub-thumbnailer for epub thumbnails (https://gitlab.gnome.org/GNOME/gnome-epub-thumbnailer) 30 # - optional: fontpreview for font preview (https://github.com/sdushantha/fontpreview) 31 # - optional: glow or lowdown for markdown 32 # - optional: w3m or lynx or elinks for html 33 # - optional: set/export ICONLOOKUP as 1 to enable file icons in front of directory previews with .iconlookup 34 # Icons and colors are configureable in .iconlookup 35 # - optional: scope.sh file viewer from ranger. 36 # 1. drop scope.sh executable in $PATH 37 # 2. set/export $USE_SCOPE as 1 38 # - optional: pistol file viewer (https://github.com/doronbehar/pistol). 39 # 1. install pistol 40 # 2. set/export $USE_PISTOL as 1 41 # 42 # Usage: 43 # You need to set a NNN_FIFO path and a key for the plugin with NNN_PLUG, 44 # then start `nnn`: 45 # 46 # $ nnn -a 47 # 48 # or 49 # 50 # $ NNN_FIFO=/tmp/nnn.fifo nnn 51 # 52 # Then launch the `preview-tui` plugin in `nnn`. 53 # 54 # If you provide the same NNN_FIFO to all nnn instances, there will be a 55 # single common preview window. If you provide different FIFO path (e.g. 56 # with -a), they will be independent. 57 # 58 # The previews will be shown in a tmux split. If that isn't possible, it 59 # will try to use a kitty terminal split. And as a final fallback, a 60 # different terminal window will be used ($TERMINAL). 61 # 62 # Tmux and kitty users can configure $SPLIT to either "h" or "v" to set a 63 # 'h'orizontal split or a 'v'ertical split (as in, the line that splits the 64 # windows will be horizontal or vertical). 65 # 66 # Kitty users need `allow_remote_control` set to `yes`, and `listen_on` set 67 # to e.g. "unix:$TMPDIR/kitty". To customize the window split, `enabled_layouts` 68 # has to be set to `all` or `splits` (the former is the default value). 69 # This terminal is also able to show images without extra dependencies. 70 # 71 # Iterm2 users are recommended to use viu to view images without getting pixelated. 72 # 73 # Windows Terminal users can set "Profile termination behavior" under "Profile > Advanced" settings 74 # to automaticaly close pane on quit when exit code is 0. 75 # 76 # Shell: POSIX compliant 77 # Authors: Todd Yamakawa, Léo Villeveygoux, @Recidiviste, Mario Ortiz Manero, Luuk van Baal, @WanderLanz 78 79 #SPLIT="$SPLIT" # you can set a permanent split here 80 #TERMINAL="$TERMINAL" # same goes for the terminal 81 DEBUG_LOG=0 # set to 1 to enable logging for debug purposes 82 USE_SCOPE="${USE_SCOPE:-0}" 83 USE_PISTOL="${USE_PISTOL:-0}" 84 ICONLOOKUP="${ICONLOOKUP:-0}" 85 PAGER="${PAGER:-less -P?n -R}" 86 TMPDIR="${TMPDIR:-/tmp}" 87 BAT_STYLE="${BAT_STYLE:-numbers}" 88 BAT_THEME="${BAT_THEME:-ansi}" 89 # Consider setting NNN_PREVIEWDIR to $XDG_CACHE_HOME/nnn/previews if you want to keep previews on disk between reboots 90 NNN_PREVIEWDIR="${NNN_PREVIEWDIR:-$TMPDIR/nnn/previews}" 91 NNN_PREVIEWWIDTH="${NNN_PREVIEWWIDTH:-1920}" 92 NNN_PREVIEWHEIGHT="${NNN_PREVIEWHEIGHT:-1080}" 93 NNN_PARENT="${NNN_FIFO#*.}" 94 [ "$NNN_PARENT" -eq "$NNN_PARENT" ] 2>/dev/null || NNN_PARENT="" 95 FIFOPID="$TMPDIR/nnn-preview-tui-fifopid.$NNN_PARENT" 96 PREVIEWPID="$TMPDIR/nnn-preview-tui-pagerpid.$NNN_PARENT" 97 CURSEL="$TMPDIR/nnn-preview-tui-selection.$NNN_PARENT" 98 FIFO_UEBERZUG="$TMPDIR/nnn-preview-tui-ueberzug-fifo.$NNN_PARENT" 99 100 if [ "$DEBUG_LOG" -eq 0 ]; then 101 DEBUG_LOGFILE="/dev/null" 102 else 103 DEBUG_LOGFILE="${TMPDIR}/preview-tui-log" 104 fi 105 106 start_preview() { 107 [ "$PAGER" = "most" ] && PAGER="less -R" 108 109 if [ -e "${TMUX%%,*}" ] && tmux -V | grep -q '[ -][3456789]\.'; then 110 TERMINAL=tmux 111 elif [ -n "$KITTY_LISTEN_ON" ]; then 112 TERMINAL=kitty 113 elif [ -z "$TERMINAL" ] && [ "$TERM_PROGRAM" = "iTerm.app" ]; then 114 TERMINAL=iterm 115 elif [ -n "$WT_SESSION" ]; then 116 TERMINAL=winterm 117 else 118 TERMINAL="${TERMINAL:-xterm}" 119 fi 120 121 if [ -z "$SPLIT" ] && [ $(($(tput lines <"$TTY") * 2)) -gt "$(tput cols <"$TTY")" ]; then 122 SPLIT='h' 123 elif [ "$SPLIT" != 'h' ]; then 124 SPLIT='v' 125 fi 126 127 case "$TERMINAL" in 128 tmux) # tmux splits are inverted 129 if [ "$SPLIT" = "v" ]; then DSPLIT="h"; else DSPLIT="v"; fi 130 tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -e TTY="$TTY" \ 131 -e "CURSEL=$CURSEL" -e "TMPDIR=$TMPDIR" -e "FIFOPID=$FIFOPID" \ 132 -e "BAT_STYLE=$BAT_STYLE" -e "BAT_THEME=$BAT_THEME" -e "PREVIEWPID=$PREVIEWPID" \ 133 -e "PAGER=$PAGER" -e "ICONLOOKUP=$ICONLOOKUP" -e "NNN_PREVIEWWIDTH=$NNN_PREVIEWWIDTH" \ 134 -e "USE_SCOPE=$USE_SCOPE" -e "SPLIT=$SPLIT" -e "USE_PISTOL=$USE_PISTOL" \ 135 -e "NNN_PREVIEWDIR=$NNN_PREVIEWDIR" -e "NNN_PREVIEWHEIGHT=$NNN_PREVIEWHEIGHT" \ 136 -e "FIFO_UEBERZUG=$FIFO_UEBERZUG" -e "QLPATH=$2" -d"$DSPLIT" "$0" "$1" ;; 137 kitty) # Setting the layout for the new window. It will be restored after the script ends. 138 kitty @ goto-layout splits 139 # Trying to use kitty's integrated window management as the split window. All 140 # environmental variables that will be used in the new window must be explicitly passed. 141 kitty @ launch --no-response --title "nnn preview" --keep-focus \ 142 --cwd "$PWD" --env "PATH=$PATH" --env "NNN_FIFO=$NNN_FIFO" \ 143 --env "PREVIEW_MODE=1" --env "PAGER=$PAGER" --env "TMPDIR=$TMPDIR" \ 144 --env "USE_SCOPE=$USE_SCOPE" --env "SPLIT=$SPLIT" --env "TERMINAL=$TERMINAL"\ 145 --env "PREVIEWPID=$PREVIEWPID" --env "FIFO_UEBERZUG=$FIFO_UEBERZUG" \ 146 --env "ICONLOOKUP=$ICONLOOKUP" --env "NNN_PREVIEWHEIGHT=$NNN_PREVIEWHEIGHT" \ 147 --env "NNN_PREVIEWWIDTH=$NNN_PREVIEWWIDTH" --env "NNN_PREVIEWDIR=$NNN_PREVIEWDIR" \ 148 --env "USE_PISTOL=$USE_PISTOL" --env "BAT_STYLE=$BAT_STYLE" \ 149 --env "BAT_THEME=$BAT_THEME" --env "FIFOPID=$FIFOPID" --env TTY="$TTY" \ 150 --env "CURSEL=$CURSEL" --location "${SPLIT}split" "$0" "$1" ;; 151 iterm) 152 command="$SHELL -c 'cd $PWD; \ 153 PATH=\\\"$PATH\\\" NNN_FIFO=\\\"$NNN_FIFO\\\" PREVIEW_MODE=1 PAGER=\\\"$PAGER\\\" \ 154 USE_SCOPE=\\\"$USE_SCOPE\\\" SPLIT=\\\"$SPLIT\\\" TERMINAL=\\\"$TERMINAL\\\" \ 155 PREVIEWPID=\\\"$PREVIEWPID\\\" CURSEL=\\\"$CURSEL\\\" TMPDIR=\\\"$TMPDIR\\\" \ 156 ICONLOOKUP=\\\"$ICONLOOKUP\\\" NNN_PREVIEWHEIGHT=\\\"$NNN_PREVIEWHEIGHT\\\" \ 157 NNN_PREVIEWWIDTH=\\\"$NNN_PREVIEWWIDTH\\\" NNN_PREVIEWDIR=\\\"$NNN_PREVIEWDIR\\\" \ 158 USE_PISTOL=\\\"$USE_PISTOL\\\" BAT_STYLE=\\\"$BAT_STYLE\\\" TTY=\\\"$TTY\\\" \ 159 BAT_THEME=\\\"$BAT_THEME\\\" FIFOPID=\\\"$FIFOPID\\\" \\\"$0\\\" \\\"$1\\\"'" 160 if [ "$SPLIT" = "h" ]; then split="horizontally"; else split="vertically"; fi 161 osascript <<-EOF 162 tell application "iTerm" 163 tell current session of current window 164 split $split with default profile command "$command" 165 end tell 166 end tell 167 EOF 168 ;; 169 winterm) 170 if [ "$SPLIT" = "h" ]; then split="H"; else split="V"; fi 171 cmd.exe /c wt -w 0 sp -$split bash -c "cd $PWD \; PATH='$PATH' NNN_FIFO=$NNN_FIFO \ 172 PREVIEW_MODE=1 TTY=$TTY CURSEL=$CURSEL TMPDIR=$TMPDIR FIFOPID=$FIFOPID \ 173 BAT_STYLE=$BAT_STYLE BAT_THEME=$BAT_THEME PREVIEWPID=$PREVIEWPID \ 174 PAGER='$PAGER' ICONLOOKUP=$ICONLOOKUP NNN_PREVIEWWIDTH=$NNN_PREVIEWWIDTH \ 175 USE_SCOPE=$USE_SCOPE SPLIT=$SPLIT USE_PISTOL=$USE_PISTOL \ 176 NNN_PREVIEWDIR=$NNN_PREVIEWDIR NNN_PREVIEWHEIGHT=$NNN_PREVIEWHEIGHT \ 177 FIFO_UEBERZUG=$FIFO_UEBERZUG QLPATH=$2 $0 $1" \; -w 0 mf previous 178 ;; 179 *) if [ -n "$2" ]; then 180 QUICKLOOK=1 QLPATH="$2" PREVIEW_MODE=1 "$0" "$1" & 181 else 182 PREVIEWPID="$PREVIEWPID" CURSEL="$CURSEL" PREVIEW_MODE=1 TTY="$TTY" \ 183 FIFOPID="$FIFOPID" FIFO_UEBERZUG="$FIFO_UEBERZUG" $TERMINAL -e "$0" "$1" & 184 fi ;; 185 esac 186 } >"$DEBUG_LOGFILE" 2>&1 187 188 toggle_preview() { 189 if exists QuickLook.exe; then 190 QLPATH="QuickLook.exe" 191 elif exists Bridge.exe; then 192 QLPATH="Bridge.exe" 193 fi 194 if kill "$(cat "$FIFOPID")"; then 195 [ -p "$NNN_PPIPE" ] && printf "0" > "$NNN_PPIPE" 196 kill "$(cat "$PREVIEWPID")" 197 pkill -f "tail --follow $FIFO_UEBERZUG" 198 if [ -n "$QLPATH" ] && stat "$1"; then 199 f="$(wslpath -w "$1")" && "$QLPATH" "$f" & 200 fi 201 else 202 [ -p "$NNN_PPIPE" ] && printf "1" > "$NNN_PPIPE" 203 start_preview "$1" "$QLPATH" 204 fi 205 } >"$DEBUG_LOGFILE" 2>&1 206 207 exists() { 208 type "$1" >/dev/null 209 } 210 211 fifo_pager() { 212 cmd="$1" 213 shift 214 215 # We use a FIFO to access $PAGER PID in jobs control 216 tmpfifopath="$TMPDIR/nnn-preview-tui-fifo.$$" 217 mkfifo "$tmpfifopath" || return 218 219 $PAGER < "$tmpfifopath" & 220 printf "%s" "$!" > "$PREVIEWPID" 221 222 ( 223 exec > "$tmpfifopath" 224 if [ "$cmd" = "pager" ]; then 225 if exists bat; then 226 bat --terminal-width="$(tput cols <"$TTY")" --decorations=always --color=always \ 227 --paging=never --style="$BAT_STYLE" --theme="$BAT_THEME" "$@" & 228 else 229 $PAGER "$@" & 230 fi 231 else 232 "$cmd" "$@" & 233 fi 234 ) 235 236 rm "$tmpfifopath" 237 } 2>"$DEBUG_LOGFILE" 238 239 # Binary file: show file info inside the pager 240 print_bin_info() { 241 printf -- "-------- \033[1;31mBinary file\033[0m --------\n" 242 if exists mediainfo; then 243 mediainfo "$1" 244 else 245 file -b "$1" 246 fi 247 } 2>"$DEBUG_LOGFILE" 248 249 handle_mime() { 250 case "$2" in 251 image/jpeg) image_preview "$cols" "$lines" "$1" ;; 252 image/gif) generate_preview "$cols" "$lines" "$1" "gif" ;; 253 image/*) generate_preview "$cols" "$lines" "$1" "image" ;; 254 video/*) generate_preview "$cols" "$lines" "$1" "video" ;; 255 audio/*) generate_preview "$cols" "$lines" "$1" "audio" ;; 256 application/font*|application/*opentype|font/*) generate_preview "$cols" "$lines" "$1" "font" ;; 257 */*office*|*/*document*) generate_preview "$cols" "$lines" "$1" "office" ;; 258 application/zip) fifo_pager unzip -l "$1" ;; 259 text/troff) 260 if exists man; then 261 fifo_pager man -Pcat -l "$1" 262 else 263 fifo_pager pager "$1" 264 fi ;; 265 *) handle_ext "$1" "$3" "$4" ;; 266 esac 267 } 268 269 handle_ext() { 270 case "$2" in 271 epub) generate_preview "$cols" "$lines" "$1" "epub" ;; 272 pdf) generate_preview "$cols" "$lines" "$1" "pdf" ;; 273 gz|bz2) fifo_pager tar -tvf "$1" ;; 274 md) if exists glow; then 275 fifo_pager glow -s dark "$1" 276 elif exists lowdown; then 277 fifo_pager lowdown -Tterm "$1" 278 else 279 fifo_pager pager "$1" 280 fi ;; 281 htm|html|xhtml) 282 if exists w3m; then 283 fifo_pager w3m "$1" 284 elif exists lynx; then 285 fifo_pager lynx "$1" 286 elif exists elinks; then 287 fifo_pager elinks "$1" 288 else 289 fifo_pager pager "$1" 290 fi ;; 291 7z|a|ace|alz|arc|arj|bz|cab|cpio|deb|jar|lha|lz|lzh|lzma|lzo\ 292 |rar|rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tZ|tzo|war|xpi|xz|Z) 293 if exists atool; then 294 fifo_pager atool -l "$1" 295 elif exists bsdtar; then 296 fifo_pager bsdtar -tvf "$1" 297 fi ;; 298 *) if [ "$3" = "bin" ]; then 299 fifo_pager print_bin_info "$1" 300 else 301 fifo_pager pager "$1" 302 fi ;; 303 esac 304 } 305 306 preview_file() { 307 clear 308 # Trying to use pistol if it's available. 309 if [ "$USE_PISTOL" -ne 0 ] && exists pistol; then 310 fifo_pager pistol "$1" 311 return 312 fi 313 314 # Trying to use scope.sh if it's available. 315 if [ "$USE_SCOPE" -ne 0 ] && exists scope.sh; then 316 fifo_pager scope.sh "$1" "$cols" "$lines" "$(mktemp -d)" "True" 317 return 318 fi 319 320 # Use QuickLook if it's available. 321 if [ -n "$QUICKLOOK" ]; then 322 stat "$1" && f="$(wslpath -w "$1")" && "$QLPATH" "$f" & 323 return 324 fi 325 326 # Detecting the exact type of the file: the encoding, mime type, and extension in lowercase. 327 encoding="$(file -bL --mime-encoding -- "$1")" 328 mimetype="$(file -bL --mime-type -- "$1")" 329 ext="${1##*.}" 330 [ -n "$ext" ] && ext="$(printf "%s" "${ext}" | tr '[:upper:]' '[:lower:]')" 331 lines=$(tput lines <"$TTY") 332 cols=$(tput cols <"$TTY") 333 334 # Otherwise, falling back to the defaults. 335 if [ -d "$1" ]; then 336 cd "$1" || return 337 if [ "$ICONLOOKUP" -ne 0 ] && [ -f "$(dirname "$0")"/.iconlookup ]; then 338 [ "$SPLIT" = v ] && BSTR="\n" 339 # shellcheck disable=SC2012 340 ls -F --group-directories-first | head -n "$((lines - 3))" | "$(dirname "$0")"/.iconlookup -l "$cols" -B "$BSTR" -b " " 341 elif exists tree; then 342 fifo_pager tree --filelimit "$(find . -maxdepth 1 | wc -l)" -L 3 -C -F --dirsfirst --noreport 343 elif exists exa; then 344 exa -G --group-directories-first --colour=always 345 else 346 fifo_pager ls -F --group-directories-first --color=always 347 fi 348 elif [ "${encoding#*)}" = "binary" ]; then 349 handle_mime "$1" "$mimetype" "$ext" "bin" 350 else 351 handle_mime "$1" "$mimetype" "$ext" 352 fi 353 } 2>"$DEBUG_LOGFILE" 354 355 generate_preview() { 356 if [ -n "$QLPATH" ] && stat "$3"; then 357 f="$(wslpath -w "$3")" && "$QLPATH" "$f" & 358 elif [ ! -f "$NNN_PREVIEWDIR/$3.jpg" ] || [ -n "$(find -L "$3" -newer "$NNN_PREVIEWDIR/$3.jpg")" ]; then 359 mkdir -p "$NNN_PREVIEWDIR/${3%/*}" 360 case $4 in 361 audio) ffmpeg -i "$3" -filter_complex "scale=iw*min(1\,min($NNN_PREVIEWWIDTH/iw\,ih)):-1" "$NNN_PREVIEWDIR/$3.jpg" -y ;; 362 epub) gnome-epub-thumbnailer "$3" "$NNN_PREVIEWDIR/$3.jpg" ;; 363 font) fontpreview -i "$3" -o "$NNN_PREVIEWDIR/$3.jpg" ;; 364 gif) if [ -p "$FIFO_UEBERZUG" ] && exists convert; then 365 frameprefix="$NNN_PREVIEWDIR/$3/${3##*/}" 366 if [ ! -d "$NNN_PREVIEWDIR/$3" ]; then 367 mkdir -p "$NNN_PREVIEWDIR/$3" 368 convert -coalesce -resize "$NNN_PREVIEWWIDTH"x"$NNN_PREVIEWHEIGHT"\> "$3" "$frameprefix.jpg" || 369 MAGICK_TMPDIR="/tmp" convert -coalesce -resize "$NNN_PREVIEWWIDTH"x"$NNN_PREVIEWHEIGHT"\> "$3" "$frameprefix.jpg" 370 fi 371 frames=$(($(find "$NNN_PREVIEWDIR/$3" | wc -l) - 2)) 372 [ $frames -lt 0 ] && return 373 while true; do 374 for i in $(seq 0 $frames); do 375 image_preview "$1" "$2" "$frameprefix-$i.jpg" 376 sleep 0.1 377 done 378 done & 379 printf "%s" "$!" > "$PREVIEWPID" 380 return 381 else 382 exec >/dev/tty 383 image_preview "$1" "$2" "$3" 384 return 385 fi ;; 386 image) if exists convert; then 387 convert "$3" -flatten -resize "$NNN_PREVIEWWIDTH"x"$NNN_PREVIEWHEIGHT"\> "$NNN_PREVIEWDIR/$3.jpg" 388 else 389 image_preview "$1" "$2" "$3" && return 390 fi ;; 391 office) libreoffice --convert-to jpg "$3" --outdir "$NNN_PREVIEWDIR/${3%/*}" 392 filename="$(printf "%s" "${3##*/}" | cut -d. -f1)" 393 mv "$NNN_PREVIEWDIR/${3%/*}/$filename.jpg" "$NNN_PREVIEWDIR/$3.jpg" ;; 394 pdf) pdftoppm -jpeg -f 1 -singlefile "$3" "$NNN_PREVIEWDIR/$3" ;; 395 video) ffmpegthumbnailer -s0 -i "$3" -o "$NNN_PREVIEWDIR/$3.jpg" || rm "$NNN_PREVIEWDIR/$3.jpg" ;; 396 esac 397 fi >"$DEBUG_LOGFILE" 398 if [ -f "$NNN_PREVIEWDIR/$3.jpg" ]; then 399 image_preview "$1" "$2" "$NNN_PREVIEWDIR/$3.jpg" 400 else 401 fifo_pager print_bin_info "$3" 402 fi 403 } 2>"$DEBUG_LOGFILE" 404 405 image_preview() { 406 clear 407 if [ "$TERMINAL" = "kitty" ]; then 408 # Kitty terminal users can use the native image preview method 409 kitty +kitten icat --silent --place "$1"x"$2"@0x0 --transfer-mode=stream --stdin=no "$3" & 410 elif exists ueberzug; then 411 ueberzug_layer "$1" "$2" "$3" && return 412 elif exists catimg; then 413 catimg "$3" & 414 elif exists viu; then 415 viu -t "$3" & 416 else 417 fifo_pager print_bin_info "$3" && return 418 fi 419 printf "%s" "$!" > "$PREVIEWPID" 420 } 2>"$DEBUG_LOGFILE" 421 422 ueberzug_layer() { 423 printf '{"action": "add", "identifier": "nnn_ueberzug", "x": 0, "y": 0, "width": "%d", "height": "%d", "scaler": "fit_contain", "path": "%s"}\n' "$1" "$2" "$3" > "$FIFO_UEBERZUG" 424 } 425 426 ueberzug_remove() { 427 printf '{"action": "remove", "identifier": "nnn_ueberzug"}\n' > "$FIFO_UEBERZUG" 428 } 429 430 winch_handler() { 431 clear 432 kill "$(cat "$PREVIEWPID")" 433 if [ -p "$FIFO_UEBERZUG" ]; then 434 pkill -f "tail --follow $FIFO_UEBERZUG" 435 tail --follow "$FIFO_UEBERZUG" | ueberzug layer --silent --parser json & 436 fi 437 preview_file "$(cat "$CURSEL")" 438 } 2>"$DEBUG_LOGFILE" 439 440 preview_fifo() { 441 while read -r selection; do 442 if [ -n "$selection" ]; then 443 kill "$(cat "$PREVIEWPID")" 444 [ -p "$FIFO_UEBERZUG" ] && ueberzug_remove 445 [ "$selection" = "close" ] && break 446 preview_file "$selection" 447 printf "%s" "$selection" > "$CURSEL" 448 fi 449 done < "$NNN_FIFO" 450 sleep 0.1 # make sure potential preview by winch_handler is killed 451 pkill -P "$$" 452 } 2>"$DEBUG_LOGFILE" 453 454 if [ "$PREVIEW_MODE" ]; then 455 if [ "$TERMINAL" != "kitty" ] && exists ueberzug; then 456 mkfifo "$FIFO_UEBERZUG" 457 tail --follow "$FIFO_UEBERZUG" | ueberzug layer --silent --parser json & 458 fi 459 460 preview_file "$PWD/$1" 461 preview_fifo & 462 printf "%s" "$!" > "$FIFOPID" 463 printf "%s" "$PWD/$1" > "$CURSEL" 464 trap 'winch_handler; wait' WINCH 465 trap 'rm "$PREVIEWPID" "$CURSEL" "$FIFO_UEBERZUG" "$FIFOPID" 2>/dev/null' INT HUP EXIT 466 wait "$!" 2>/dev/null 467 exit 0 468 else 469 if [ ! -r "$NNN_FIFO" ]; then 470 clear 471 printf "No FIFO available! (\$NNN_FIFO='%s')\nPlease read Usage in preview-tui." "$NNN_FIFO" 472 cfg=$(stty -g); stty raw -echo; head -c 1; stty "$cfg" 473 elif [ "$KITTY_WINDOW_ID" ] && [ -z "$TMUX" ] && [ -z "$KITTY_LISTEN_ON" ]; then 474 clear 475 printf "\$KITTY_LISTEN_ON not set!\nPlease read Usage in preview-tui." 476 cfg=$(stty -g); stty raw -echo; head -c 1; stty "$cfg" 477 else 478 TTY="$(tty)" 479 TTY="$TTY" toggle_preview "$1" & 480 fi 481 fi