mirror of
https://github.com/jarun/nnn.git
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436 lines
17 KiB
Bash
Executable file
436 lines
17 KiB
Bash
Executable file
#!/usr/bin/env sh
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# Description: Terminal based file previewer
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#
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# Note: This plugin needs a "NNN_FIFO" to work. See man.
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#
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# Dependencies:
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# - Supports 4 independent methods to preview with:
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# - tmux (>=3.0), or
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# - kitty with allow_remote_control and listen_on set in kitty.conf, or
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# - QuickLook on WSL (https://github.com/QL-Win/QuickLook)
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# - $TERMINAL set to a terminal (it's xterm by default).
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# - less or $PAGER
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# - tree or exa or ls
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# - mediainfo or file
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# - mktemp
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# - unzip
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# - tar
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# - man
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# - optional: bsdtar or atool for additional archive preview
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# - optional: bat for code syntax highlighting
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# - optional: ueberzug, kitty terminal, viu or catimg for images
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# - optional: convert(ImageMagick) for playing gif preview
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# - optional: ffmpegthumbnailer for video thumbnails (https://github.com/dirkvdb/ffmpegthumbnailer)
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# - optional: ffmpeg for audio thumbnails
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# - optional: libreoffce for opendocument/officedocument preview
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# - optional: pdftoppm(poppler) for pdf thumbnails
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# - optional: gnome-epub-thumbnailer for epub thumbnails (https://gitlab.gnome.org/GNOME/gnome-epub-thumbnailer)
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# - optional: fontpreview for font preview (https://github.com/sdushantha/fontpreview)
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# - optional: glow or lowdown for markdown
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# - optional: w3m or lynx or elinks for html
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# - optional: set/export ICONLOOKUP as 1 to enable file icons in front of directory previews with .iconlookup
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# Icons and colors are configureable in .iconlookup
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# - optional: scope.sh file viewer from ranger.
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# To use:
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# 1. drop scope.sh executable in $PATH
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# 2. set/export $USE_SCOPE as 1
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# - optional: pistol file viewer (https://github.com/doronbehar/pistol).
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# To use:
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# 1. install pistol
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# 2. set/export $USE_PISTOL as 1
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#
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# Usage:
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# You need to set a NNN_FIFO path and a key for the plugin with NNN_PLUG,
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# then start `nnn`:
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#
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# $ nnn -a
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#
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# or
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#
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# $ NNN_FIFO=/tmp/nnn.fifo nnn
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#
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# Then in `nnn`, launch the `preview-tui-ext` plugin.
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#
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# If you provide the same NNN_FIFO to all nnn instances, there will be a
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# single common preview window. If you provide different FIFO path (e.g.
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# with -a), they will be independent.
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#
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# The previews will be shown in a tmux split. If that isn't possible, it
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# will try to use a kitty terminal split. And as a final fallback, a
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# different terminal window will be used ($TERMINAL).
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#
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# Tmux and kitty users can configure $SPLIT to either "h" or "v" to set a
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# 'h'orizontal split or a 'v'ertical split (as in, the line that splits the
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# windows will be horizontal or vertical).
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#
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# Kitty users need `allow_remote_control` set to `yes`, and `listen_on` set
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# to e.g. "$TMPDIR/kitty". To customize the window split, `enabled_layouts`
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# has to be set to `all` or `splits` (the former is the default value).
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# This terminal is also able to show images without extra dependencies.
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#
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# Shell: POSIX compliant
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# Authors: Todd Yamakawa, Léo Villeveygoux, @Recidiviste, Mario Ortiz Manero, Luuk van Baal
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SPLIT="$SPLIT" # you can set a permanent split here
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TERMINAL="$TERMINAL" # same goes for the terminal
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USE_SCOPE="${USE_SCOPE:-0}"
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USE_PISTOL="${USE_PISTOL:-0}"
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ICONLOOKUP="${ICONLOOKUP:-0}"
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PAGER="${PAGER:-less -P?n -R}"
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TMPDIR="${TMPDIR:-/tmp}"
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# Consider setting NNN_PREVIEWDIR to $XDG_CACHE_DIR if you want to keep previews on disk between reboots
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NNN_PREVIEWDIR="${NNN_PREVIEWDIR:-$TMPDIR}/nnn/previews"
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NNN_PREVIEWWIDTH="${NNN_PREVIEWWIDTH:-1920}"
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NNN_PREVIEWHEIGHT="${NNN_PREVIEWHEIGHT:-1080}"
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startpreview() {
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NUMPREVIEWTUI="$(($(find "$TMPDIR" -maxdepth 1 -name 'nnn-preview-tui-pagerpid*' 2>/dev/null | wc -l) + 1))"
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PAGERPID="$TMPDIR/nnn-preview-tui-pagerpid.$NUMPREVIEWTUI"
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GIFPID="$TMPDIR/nnn-preview-tui-gifpid.$NUMPREVIEWTUI"
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CURSEL="$TMPDIR/nnn-preview-tui-selection.$NUMPREVIEWTUI"
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FIFO_UEBERZUG="$TMPDIR/nnn-preview-tui-ueberzug-fifo.$NUMPREVIEWTUI"
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[ "$PAGER" = "most" ] && PAGER="less -R"
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if [ -e "${TMUX%%,*}" ] && tmux -V | grep -q '[ -][3456789]\.'; then
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TERMINAL=tmux
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elif [ -n "$KITTY_LISTEN_ON" ]; then
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TERMINAL=kitty
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else
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TERMINAL="${TERMINAL:-xterm}"
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fi
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if [ -z "$SPLIT" ] && [ $(($(tput lines) * 2)) -gt "$(tput cols)" ]; then
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SPLIT='h'
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elif [ "$SPLIT" != 'h' ]; then
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SPLIT='v'
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fi
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if [ "$TERMINAL" = "tmux" ]; then
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# tmux splits are inverted
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if [ "$SPLIT" = "v" ]; then SPLIT="h"; else SPLIT="v"; fi
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tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -e "PAGER=$PAGER" \
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-e "USE_SCOPE=$USE_SCOPE" -e "SPLIT=$SPLIT" -e "USE_PISTOL=$USE_PISTOL" \
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-e "PAGERPID=$PAGERPID" -e "GIFPID=$GIFPID" -e "CURSEL=$CURSEL" -e "TMPDIR=$TMPDIR" \
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-e "ICONLOOKUP=$ICONLOOKUP" -e "NNN_PREVIEWDIR=$NNN_PREVIEWDIR" \
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-e "NNN_PREVIEWWIDTH=$NNN_PREVIEWWIDTH" -e "NNN_PREVIEWHEIGHT=$NNN_PREVIEWHEIGHT" \
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-e "FIFO_UEBERZUG=$FIFO_UEBERZUG" -e "QLPATH=$2" -d"$SPLIT" "$0" "$1"
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elif [ "$TERMINAL" = "kitty" ]; then
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# Setting the layout for the new window. It will be restored after the
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# script ends.
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kitty @ goto-layout splits >/dev/null
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# Trying to use kitty's integrated window management as the split window.
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# All environmental variables that will be used in the new window must
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# be explicitly passed.
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kitty @ launch --no-response --title "nnn preview" --keep-focus \
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--cwd "$PWD" --env "PATH=$PATH" --env "NNN_FIFO=$NNN_FIFO" \
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--env "PREVIEW_MODE=1" --env "PAGER=$PAGER" --env "TMPDIR=$TMPDIR" \
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--env "USE_SCOPE=$USE_SCOPE" --env "SPLIT=$SPLIT" --env "TERMINAL=$TERMINAL"\
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--env "USE_PISTOL=$USE_PISTOL" --env "PAGERPID=$PAGERPID" \
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--env "GIFPID=$GIFPID" --env "FIFO_UEBERZUG=$FIFO_UEBERZUG" \
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--env "ICONLOOKUP=$ICONLOOKUP" --env "NNN_PREVIEWDIR=$NNN_PREVIEWDIR" \
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--env "NNN_PREVIEWWIDTH=$NNN_PREVIEWWIDTH" --env "NNN_PREVIEWHEIGHT=$NNN_PREVIEWHEIGHT" \
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--env "CURSEL=$CURSEL" --location "${SPLIT}split" "$0" "$1" >/dev/null
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elif [ -n "$2" ]; then
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QUICKLOOK=1 QLPATH="$2" PREVIEW_MODE=1 "$0" "$1" >/dev/null &
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else
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PAGERPID="$PAGERPID" GIFPID="$GIFPID" CURSEL="$CURSEL" PREVIEW_MODE=1 \
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FIFO_UEBERZUG="$FIFO_UEBERZUG" $TERMINAL -e "$0" "$1" 2>/dev/null &
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fi
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}
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togglepreview() {
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if exists QuickLook.exe; then
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QLPATH="QuickLook.exe"
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elif exists Bridge.exe; then
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QLPATH="Bridge.exe"
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fi
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if pkill -fx "cat $NNN_FIFO" >/dev/null; then
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if [ -n "$QLPATH" ] && stat "$1" >/dev/null 2>&1; then
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f="$(wslpath -w "$1" 2>&1)" && "$QLPATH" "$f" &
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fi
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else
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startpreview "$1" "$QLPATH"
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fi
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}
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exists() {
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which "$1" >/dev/null 2>&1
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}
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fifo_pager() {
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cmd="$1"
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shift
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# We use a FIFO to access $PAGER PID in jobs control
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tmpfifopath="$TMPDIR/nnn-preview-tui-fifo.$$"
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mkfifo "$tmpfifopath" || return
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$PAGER < "$tmpfifopath" &
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printf "%s" "$!" > "$PAGERPID"
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(
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exec > "$tmpfifopath"
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if [ "$cmd" = "pager" ]; then
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if exists bat; then
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bat --terminal-width="$(tput cols)" --paging=never --decorations=always --color=always "$@" 2>/dev/null &
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else
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$PAGER "$@" &
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fi
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else
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"$cmd" "$@" &
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fi
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)
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rm "$tmpfifopath"
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}
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# Binary file: show file info inside the pager
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print_bin_info() {
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printf -- "-------- \033[1;31mBinary file\033[0m --------\n"
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if exists mediainfo; then
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mediainfo "$1" 2>/dev/null
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else
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file -b "$1"
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fi
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}
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preview_file() {
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clear
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# Trying to use pistol if it's available.
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if [ "$USE_PISTOL" -ne 0 ] && exists pistol; then
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fifo_pager pistol "$1"
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return
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fi
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# Trying to use scope.sh if it's available.
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if [ "$USE_SCOPE" -ne 0 ] && exists scope.sh; then
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fifo_pager scope.sh "$1" "$cols" "$lines" "$(mktemp -d)" \
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"True" 2>/dev/null
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return
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fi
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# Use QuickLook if it's available.
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if [ -n "$QUICKLOOK" ]; then
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stat "$1" >/dev/null 2>&1 && f="$(wslpath -w "$1" 2>&1)" && "$QLPATH" "$f" &
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return
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fi
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# Detecting the exact type of the file: the encoding, mime type, and
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# extension in lowercase.
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encoding="$(file -bL --mime-encoding -- "$1")"
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mimetype="$(file -bL --mime-type -- "$1")"
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ext="${1##*.}"
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if [ -n "$ext" ]; then
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ext="$(printf "%s" "${ext}" | tr '[:upper:]' '[:lower:]')"
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fi
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lines=$(tput lines)
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cols=$(tput cols)
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# Otherwise, falling back to the defaults.
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if [ -d "$1" ]; then
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cd "$1" || return
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if [ "$ICONLOOKUP" -ne 0 ] && [ -f "$(dirname "$0")"/.iconlookup ]; then
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[ "$SPLIT" = h ] && [ "$TERMINAL" != "kitty" ] && BSTR="\n"
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[ "$SPLIT" = v ] && [ "$TERMINAL" = "kitty" ] && BSTR="\n"
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# shellcheck disable=SC2012
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ls -F --group-directories-first | head -n "$((lines - 3))" | "$(dirname "$0")"/.iconlookup -l "$cols" -B "$BSTR" -b " "
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elif exists tree; then
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fifo_pager tree --filelimit "$(find . -maxdepth 1 | wc -l)" -L 3 -C -F --dirsfirst --noreport
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elif exists exa; then
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exa -G --group-directories-first --colour=always 2>/dev/null
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else
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fifo_pager ls -F --group-directories-first --color=always
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fi
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elif [ "${encoding#*)}" = "binary" ]; then
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if [ "${mimetype%%/*}" = "image" ]; then
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if [ "${mimetype#*/}" = "gif" ]; then
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generate_preview "$cols" "$lines" "$1" "gif"
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elif [ "${mimetype#*/}" != "jpeg" ]; then
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generate_preview "$cols" "$lines" "$1" "image"
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else
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image_preview "$cols" "$lines" "$1"
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fi
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elif [ "${mimetype%%/*}" = "audio" ]; then
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generate_preview "$cols" "$lines" "$1" "audio"
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elif [ "${mimetype%%/*}" = "video" ]; then
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generate_preview "$cols" "$lines" "$1" "video"
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elif [ "$ext" = "pdf" ]; then
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generate_preview "$cols" "$lines" "$1" "pdf"
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elif [ "$ext" = "epub" ]; then
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generate_preview "$cols" "$lines" "$1" "epub"
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elif [ "${mimetype#*opentype}" != "$mimetype" ] || [ "${mimetype#*font}" != "$mimetype" ]; then
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generate_preview "$cols" "$lines" "$1" "font"
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elif [ "${mimetype#*office}" != "$mimetype" ] || [ "${mimetype#*document}" != "$mimetype" ]; then
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generate_preview "$cols" "$lines" "$1" "office"
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elif [ "$mimetype" = "application/zip" ]; then
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fifo_pager unzip -l "$1"
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elif [ "$ext" = "gz" ] || [ "$ext" = "bz2" ]; then
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fifo_pager tar -tvf "$1"
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else
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case "$ext" in
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7z|a|ace|alz|arc|arj|bz|cab|cpio|deb|jar|lha|lz|lzh|lzma|lzo\
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|rar|rpm|rz|t7z|tar|tbz|tbz2|tgz|tlz|txz|tZ|tzo|war|xpi|xz|Z)
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if exists atool; then
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fifo_pager atool -l "$1"
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elif exists bsdtar; then
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fifo_pager bsdtar -tvf "$1"
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fi ;;
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*) fifo_pager print_bin_info "$1" ;;
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esac
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fi
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elif [ "$ext" = "md" ]; then
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if exists glow; then
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fifo_pager glow -s dark "$1"
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elif exists lowdown; then
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fifo_pager lowdown -Tterm "$1"
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else
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fifo_pager pager "$1"
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fi
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elif [ "$ext" = "htm" ] || [ "$ext" = "html" ] || [ "$ext" = "xhtml" ]; then
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if exists w3m; then
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fifo_pager w3m "$1"
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elif exists lynx; then
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fifo_pager lynx "$1"
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elif exists elinks; then
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fifo_pager elinks "$1"
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else
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fifo_pager pager "$1"
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fi
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elif [ "$mimetype" = "text/troff" ]; then
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if exists man; then
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fifo_pager man -Pcat -l "$1"
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else
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fifo_pager pager "$1"
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fi
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else
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fifo_pager pager "$1"
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fi
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}
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generate_preview() {
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if [ -n "$QLPATH" ] && stat "$3" >/dev/null 2>&1; then
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f="$(wslpath -w "$3" 2>&1)" && "$QLPATH" "$f" &
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elif [ ! -f "$NNN_PREVIEWDIR/$3.jpg" ] || [ -n "$(find -L "$3" -newer "$NNN_PREVIEWDIR/$3.jpg")" ]; then
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mkdir -p "$NNN_PREVIEWDIR/${3%/*}"
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case $4 in
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audio) ffmpeg -i "$3" -filter_complex "scale=iw*min(1\,min($NNN_PREVIEWWIDTH/iw\,ih)):-1" "$NNN_PREVIEWDIR/$3.jpg" -y >/dev/null 2>&1 ;;
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epub) gnome-epub-thumbnailer "$3" "$NNN_PREVIEWDIR/$3.jpg" >/dev/null 2>&1 ;;
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font) fontpreview -i "$3" -o "$NNN_PREVIEWDIR/$3.jpg" >/dev/null 2>&1 ;;
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gif) if exists ueberzug && exists convert && [ "$TERMINAL" != "kitty" ]; then
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if [ ! -d "$NNN_PREVIEWDIR/$3" ]; then
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mkdir -p "$NNN_PREVIEWDIR/$3"
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convert -coalesce -resize "$NNN_PREVIEWWIDTH"x"$NNN_PREVIEWHEIGHT"\> "$3" "$NNN_PREVIEWDIR/$3/${3##*/}.jpg"
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fi
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while true; do
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for frame in $(find "$NNN_PREVIEWDIR/$3"/*.jpg | sort -V); do
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image_preview "$1" "$2" "$frame"
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sleep 0.1
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done
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done &
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printf "%s" "$!" > "$GIFPID"
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return
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else
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image_preview "$1" "$2" "$3"
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return
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fi ;;
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image) convert "$3" -flatten -resize "$NNN_PREVIEWWIDTH"x"$NNN_PREVIEWHEIGHT"\> "$NNN_PREVIEWDIR/$3.jpg" ;;
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office) libreoffice --convert-to jpg "$3" --outdir "$NNN_PREVIEWDIR/${3%/*}" > /dev/null 2>&1
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filename="$(printf "%s" "${3##*/}" | cut -d. -f1)"
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mv "$NNN_PREVIEWDIR/${3%/*}/$filename.jpg" "$NNN_PREVIEWDIR/$3.jpg" ;;
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pdf) pdftoppm -jpeg -f 1 -singlefile "$3" "$NNN_PREVIEWDIR/$3" >/dev/null 2>&1 ;;
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video) ffmpegthumbnailer -s0 -i "$3" -o "$NNN_PREVIEWDIR/$3.jpg" >/dev/null 2>&1 || rm "$NNN_PREVIEWDIR/$3.jpg" ;;
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esac
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fi
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if [ -f "$NNN_PREVIEWDIR/$3.jpg" ]; then
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image_preview "$1" "$2" "$NNN_PREVIEWDIR/$3.jpg"
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else
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fifo_pager print_bin_info "$3"
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fi
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}
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image_preview() {
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clear
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if [ "$TERMINAL" = "kitty" ]; then
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# Kitty terminal users can use the native image preview method.
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kitty +kitten icat --silent --place "$1"x"$2"@0x0 --transfer-mode=stream --stdin=no "$3"
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elif exists ueberzug; then
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ueberzug_layer "$1" "$2" "$3"
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elif exists catimg; then
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catimg "$3" &
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printf "%s" "$!" > "$GIFPID"
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elif exists viu; then
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viu -t "$3" &
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printf "%s" "$!" > "$GIFPID"
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else
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fifo_pager print_bin_info "$3"
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fi
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}
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ueberzug_layer() {
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printf '{"action": "add", "identifier": "nnn_ueberzug", "x": 0, "y": 0, "width": "%s", "height": "%s", "scaler": "fit_contain", "path": "%s"}\n' "$1" "$2" "$3" > "$FIFO_UEBERZUG"
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}
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ueberzug_remove() {
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printf '{"action": "remove", "identifier": "nnn_ueberzug"}\n' > "$FIFO_UEBERZUG"
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}
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ueberzug_refresh() {
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clear
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kill "$(cat "$GIFPID" 2>/dev/null)" >/dev/null 2>&1
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pkill -P "$$" >/dev/null 2>&1
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pkill -f -n preview-tui-ext >/dev/null 2>&1
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tail --follow "$FIFO_UEBERZUG" | ueberzug layer --silent --parser json &
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printf "\n" > "$NNN_FIFO"
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preview_fifo 2>/dev/null &
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preview_file "$(cat "$CURSEL")"
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wait
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}
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preview_fifo() {
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# use cat instead of 'exec <' to avoid issues with dash shell
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# shellcheck disable=SC2002
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cat "$NNN_FIFO" |\
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while read -r selection; do
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kill "$(cat "$GIFPID" 2>/dev/null)" >/dev/null 2>&1
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kill "$(cat "$PAGERPID" 2>/dev/null)" >/dev/null 2>&1
|
|
[ "$TERMINAL" != "kitty" ] && exists ueberzug && ueberzug_remove
|
|
preview_file "$selection"
|
|
printf "%s" "$selection" > "$CURSEL"
|
|
done
|
|
kill "$(cat "$GIFPID" 2>/dev/null)" >/dev/null 2>&1
|
|
kill "$(cat "$PAGERPID" 2>/dev/null)" >/dev/null 2>&1
|
|
[ "$TERMINAL" != "kitty" ] && exists ueberzug && ueberzug_remove
|
|
rm "$PAGERPID" "$GIFPID" "$CURSEL" "$FIFO_UEBERZUG" >/dev/null 2>&1
|
|
pkill -P "$$" >/dev/null 2>&1
|
|
}
|
|
|
|
if [ "$PREVIEW_MODE" ]; then
|
|
if [ "$TERMINAL" != "kitty" ] && exists ueberzug; then
|
|
mkfifo "$FIFO_UEBERZUG"
|
|
trap 'ueberzug_refresh; rm "$FIFO_UEBERZUG"' WINCH
|
|
tail --follow "$FIFO_UEBERZUG" | ueberzug layer --silent --parser json &
|
|
fi
|
|
trap 'rm "$PAGERPID" "$GIFPID" "$CURSEL" "$FIFO_UEBERZUG" 2>/dev/null' INT HUP EXIT
|
|
|
|
preview_file "$PWD/$1"
|
|
printf "%s" "$PWD/$1" > "$CURSEL" &
|
|
preview_fifo 2>/dev/null &
|
|
wait
|
|
else
|
|
if [ ! -r "$NNN_FIFO" ]; then
|
|
clear
|
|
printf "No FIFO available! (\$NNN_FIFO='%s')\nPlease read Usage in preview-tui-ext." "$NNN_FIFO"
|
|
cfg=$(stty -g); stty raw -echo; head -c 1; stty "$cfg"
|
|
elif [ "$KITTY_WINDOW_ID" ] && [ -z "$KITTY_LISTEN_ON" ]; then
|
|
clear
|
|
printf "\$KITTY_LISTEN_ON not set!\nPlease read Usage in preview-tui-ext."
|
|
cfg=$(stty -g); stty raw -echo; head -c 1; stty "$cfg"
|
|
else
|
|
togglepreview "$1" &
|
|
fi
|
|
fi
|