mirror of
https://github.com/jarun/nnn.git
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102 lines
2.6 KiB
Bash
Executable file
102 lines
2.6 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, file, tree
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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_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, they
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# 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}"
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SPLIT=
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lines=$(($(tput lines)-1))
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cols=$(tput cols)
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preview_file () {
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kill "$(jobs -p)" 2>/dev/null
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clear
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encoding="$(file -b --mime-encoding "$1")"
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if [ -d "$1" ]; then
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# Print directory tree
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cd "$1" || return
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# we use a FIFO to access less PID
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tmpfifopath="${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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tree&
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)
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rm "$tmpfifopath"
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elif [ "$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 "\n-------- stat --------"
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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%%,*}" ] && [ "$(tmux -V | cut -c6)" -eq 3 ] ; then
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if [ -z "$SPLIT" ]; then
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if [ "$(( lines * 2 ))" -gt "$cols" ]; then
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tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -dv "$0" "$1"
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else
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tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -dh "$0" "$1"
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fi
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elif [ "$SPLIT" = "h" ]; then
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tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -dh "$0" "$1"
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elif [ "$SPLIT" = "v" ]; then
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tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -dv "$0" "$1"
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else
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tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -dh "$0" "$1"
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fi
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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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