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preview-tui: async version using $PAGER to scroll preview (#597)

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lvgx 2020-05-27 20:02:22 +02:00 committed by GitHub
parent b6762e292c
commit bbcd89c8d6
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1 changed files with 28 additions and 14 deletions
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28
plugins/preview-tui
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@ -4,7 +4,7 @@
# #
# Note: This plugin needs a "NNN_FIFO" to work. # Note: This plugin needs a "NNN_FIFO" to work.
# #
# Dependencies: tmux (>=3.0) or xterm (or set $TERMINAL), file, tree # Dependencies: tmux (>=3.0) or xterm or $TERMINAL, less or $PAGER, file, tree
# #
# Usage: # Usage:
# You need to set a NNN_FIFO path and set a key for the plugin, # You need to set a NNN_FIFO path and set a key for the plugin,
@ -22,24 +22,38 @@
# Authors: Todd Yamakawa, Léo Villeveygoux # Authors: Todd Yamakawa, Léo Villeveygoux
TERMINAL="${TERMINAL:-xterm}" TERMINAL="${TERMINAL:-xterm}"
PAGER="${PAGER:-less}"
preview_file () { preview_file () {
kill %- %+ 2>/dev/null
clear clear
lines=$(($(tput lines)-1))
cols=$(tput cols) # prevent shell pipe reuse
tmpfifopath="${TMPDIR:-/tmp}/nnn-preview-tui-fifo.$$"
mkfifo "$tmpfifopath" || return
encoding="$(file -b --mime-encoding "$1")" encoding="$(file -b --mime-encoding "$1")"
$PAGER < "$tmpfifopath" &
(
exec > "$tmpfifopath"
if [ -d "$1" ]; then if [ -d "$1" ]; then
# Print directory tree # Print directory tree
cd "$1" && tree | head -n $lines | cut -c 1-"$cols" cd "$1" && tree
elif [ "$encoding" = "binary" ] ; then elif [ "$encoding" = "binary" ] ; then
# Binary file: just print filetype info # Binary file: just print filetype info
echo "-------- Binary file --------" echo "-------- Binary file --------"
file -b "$1" file -b "$1"
else else
# Text file: print file head # Text file:
head -n $lines "$1" | cut -c 1-"$cols" cat "$1"
fi fi &
)
rm "$tmpfifopath"
} }
if [ "$PREVIEW_MODE" ] ; then if [ "$PREVIEW_MODE" ] ; then