2020-05-17 12:08:29 +00:00
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#!/usr/bin/env sh
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# Description: File previewer for kitty term using NNN_FIFO
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#
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# Dependencies:
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# - kitty (https://sw.kovidgoyal.net/kitty/) with allow_remote_control on
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# - file
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# - exa (https://github.com/ogham/exa) (fallback: ls)
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# - bat (https://github.com/sharkdp/bat) (fallback: cat)
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# - mediainfo (fallback: file)
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#
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# Usage:
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# This plugin only works in kitty (https://sw.kovidgoyal.net/kitty/),
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# and with kitty's 'allow_remote_control' option turned on.
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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-kitty` 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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# Shell: POSIX compliant
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# Authors: Léo Villeveygoux
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preview_file () {
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clear
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lines=$(($(tput lines)-1))
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cols=$(tput cols)
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mime="$(file -b --mime-type "$1")"
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2020-05-22 02:48:00 +00:00
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encoding="$(file -b --mime-encoding "$1")"
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2020-05-17 12:08:29 +00:00
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if [ -d "$1" ]; then
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# Print directory tree
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# shellcheck disable=SC2015
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cd "$1" && \
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COLUMNS=$cols exa -G --colour=always 2>/dev/null || ls --color=alway
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elif [ "${mime%%/*}" = "image" ] ; then
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kitty +kitten icat --silent --transfer-mode=stream --stdin=no "$1"
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2020-05-22 02:48:00 +00:00
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elif [ "$encoding" = "binary" ] ; then
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# Binary file: show file info
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2020-05-17 12:08:29 +00:00
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printf -- "-------- \033[1;31mBinary file\033[0m --------\n"
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mediainfo "$1" 2>/dev/null || file -b "$1"
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2020-05-22 02:48:00 +00:00
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else
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# Text file: print colored file content
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bat --terminal-width="$cols" --paging=never --decorations=always \
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--color=always "$1" 2>/dev/null || cat
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2020-05-17 12:08:29 +00:00
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fi | head -n $lines
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}
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if [ "$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 "$selection"
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done
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exit 0
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fi
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kitty @ launch --no-response --title "nnn preview" --keep-focus \
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--cwd="$PWD" --env "NNN_FIFO=$NNN_FIFO" --env "PREVIEW_MODE=1" \
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"$0" "$1" > /dev/null
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