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Add a tmux/xterm based text previewer plugin (#557)

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Uses `NNN_FIFO`, minimal dependencies.

Co-authored-by: Todd Yamakawa <todd.yamakawa@arm.com>

Co-authored-by: Todd Yamakawa <todd.yamakawa@arm.com>
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lvgx 2020-05-06 01:08:10 +02:00 committed by GitHub
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1
plugins/README.md
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@ -61,6 +61,7 @@ Plugins are installed to `${XDG_CONFIG_HOME:-$HOME/.config}/nnn/plugins`.
| pdfview | View PDF file in `$PAGER` | sh | pdftotext/<br>mupdf-tools |
| picker | Pick files and list one per line (to pipe) | sh | nnn |
| preview-tabbed | `tabbed`/xembed based file previewer | bash | _see in-file docs_ |
| preview-tui | Simple TUI file previewer (needs NNN_FIFO) | sh | tmux/xterm/\$TERMINAL <br> file, tree |
| pskill | Fuzzy list by name and kill process or zombie | sh | fzf/fzy, ps,<br>sudo/doas |
| renamer | Batch rename selection or files in dir | sh | [qmv](https://www.nongnu.org/renameutils/)/[vidir](https://joeyh.name/code/moreutils/) |
| ringtone | Create a variable bitrate mp3 ringtone from file | sh | date, ffmpeg |

68
plugins/preview-tui Executable file
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@ -0,0 +1,68 @@
#!/usr/bin/env sh
# Description: Text based file previewer
#
# Note: This plugin needs a "NNN_FIFO" to work.
#
# Dependencies: tmux or xterm (or set $TERMINAL), file, tree
#
# How to use:
# You need to set a NNN_FIFO path and set a key for the plugin,
# then start `nnn`:
#
# $ NNN_FIFO=/tmp/nnn.fifo nnn
#
# Then in `nnn`, launch the `preview-tui` plugin.
#
# If you provide the same NNN_FIFO to all nnn instances, there will be a
# single common preview window. I you provide different FIFO path, they
# will be independent.
#
# Authors: Todd Yamakawa and Léo Villeveygoux
TERMINAL="${TERMINAL:-xterm}"
NUKE="${XDG_CONFIG_HOME:-$HOME/.config}/nnn/plugins/nuke"
if [ ! -r "$NNN_FIFO" ] ; then
echo "No FIFO available! (\$NNN_FIFO='$NNN_FIFO')" >&2
exit 1
fi
if [ ! -x "$NUKE" ] ; then
echo "Nuke not found!" >&2
exit 1
fi
if [ "$PREVIEW_MODE" ] ; then
exec < "$NNN_FIFO"
while read -r selection ; do
clear
lines=$(($(tput lines)-1))
cols=$(tput cols)
mime="$(file -b --mime-type "$selection")"
if [ "$mime" = "inode/directory" ] ; then
# Print directory tree
cd "$selection" && tree | head -n $lines | cut -c 1-"$cols"
elif [ "${mime%%/*}" = "text" ] ; then
# Print file head
head -n $lines "$selection" | cut -c 1-"$cols"
else
# Binary file
echo "-------- Binary file --------"
file -b "$selection"
fi
done
if [ -e "${TMUX%%,*}" ] ; then
tmux kill-pane
fi
exit 0
fi
if [ -e "${TMUX%%,*}" ] ; then
tmux split-window -e "NNN_FIFO=$NNN_FIFO" -e "PREVIEW_MODE=1" -dh "$0"
else
PREVIEW_MODE=1 GUI=0 $TERMINAL -e "$0" &
fi