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https://github.com/jarun/nnn.git
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120 lines
2.9 KiB
Bash
Executable file
120 lines
2.9 KiB
Bash
Executable file
#!/usr/bin/env sh
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# Description: Text based file previewer
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#
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# Note: This plugin needs a "NNN_FIFO" to work.
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#
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# Dependencies: tmux (>=3.0) or xterm or $TERMINAL, less or $PAGER,
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# file, stat, tree, man, tar, unzip, ...
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# ... add you own! (see examples in code)
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#
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# Usage:
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# You need to set a NNN_FIFO path and set a key for the plugin,
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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` 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. I 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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# Configure SPLIT to either "h" or "v" to set a 'h'orizontal split or a
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# 'v'ertical split
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#
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# Shell: POSIX compliant
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# Authors: Todd Yamakawa, Léo Villeveygoux, @Recidiviste
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TERMINAL="${TERMINAL:-xterm}"
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PAGER="${PAGER:-less -R}"
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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:-/tmp}/nnn-preview-tui-fifo.$$"
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mkfifo "$tmpfifopath" || return
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$PAGER < "$tmpfifopath" &
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(
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exec > "$tmpfifopath"
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"$cmd" "$@" &
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)
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rm "$tmpfifopath"
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}
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preview_file () {
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kill %- %+ 2>/dev/null && wait %- %+ 2>/dev/null
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clear
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encoding="$(file -Lb --mime-encoding -- "$1")"
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# Detect mime type
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mimetype="$(file -Lb --mime-type -- "$1")"
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# Detect file extention
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ext="${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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if [ -d "$1" ]; then
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# Print directory tree
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cd "$1" || return
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fifo_pager tree
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#elif [ "${mimetype%%/*}" = "image" ] ; then
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# catimg "$1"
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elif [ "$mimetype" = "text/troff" ] ; then
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fifo_pager man -Pcat -l "$1"
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elif [ "$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 "$1"
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elif [ "$encoding" = "binary" ] ; then
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# Binary file: just print filetype info
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echo "-------- binary file --------"
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file -b "$1"
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echo
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stat "$1"
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else
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# Text file:
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$PAGER "$1" &
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fi
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}
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if [ "$PREVIEW_MODE" ] ; then
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if [ ! -r "$NNN_FIFO" ] ; then
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echo "No FIFO available! (\$NNN_FIFO='$NNN_FIFO')" >&2
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read -r
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exit 1
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fi
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preview_file "$1"
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exec < "$NNN_FIFO"
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while read -r selection ; do
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preview_file "$selection"
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done
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exit 0
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fi
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if [ -e "${TMUX%%,*}" ] && tmux -V | grep -q '[ -][3456789]\.' ; then
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if [ -z "$SPLIT" ] && [ $(($(tput lines) * 2)) -gt "$(tput cols)" ] ; then
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SPLIT='v'
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elif [ "$SPLIT" != 'v' ] ; then
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SPLIT='h'
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fi
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tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -d"$SPLIT" "$0" "$1"
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else
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PREVIEW_MODE=1 $TERMINAL -e "$0" "$1" &
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fi
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