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#!/usr/bin/env bash
readonly ID_PREVIEW="preview"
# Preview an image file directly
function draw() {
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="${PWD}/$6") \
> "$FIFO_UEBERZUG"
}
function font_preview() {
# if no preview found, generate one
if [ ! -f "/tmp${PWD}/$6.png" ]; then
fontpreview -i "$6" -o "/tmp${PWD}/$6.png"
fi
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp${PWD}/$6.png") \
> "$FIFO_UEBERZUG"
}
function pdf_preview() {
# if no preview found, generate one
if [ ! -f "/tmp${PWD}/$6.png" ]; then
pdftoppm -png -singlefile "$6" "/tmp${PWD}/$6"
fi
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp${PWD}/$6.png") \
> "$FIFO_UEBERZUG"
}
function audio_preview() {
# if no preview found, generate one
if [ ! -f "/tmp${PWD}/$6.png" ]; then
ffmpeg -i "$6" "/tmp${PWD}/$6.png" -y &> /dev/null
fi
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp${PWD}/$6.png") \
> "$FIFO_UEBERZUG"
}
function video_preview() {
# if no preview found, generate one
if [ ! -f "/tmp${PWD}/$6.png" ]; then
ffmpegthumbnailer -i "${PWD}/$6" -o "/tmp${PWD}/$6.png" -s 0 -q 10
fi
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp${PWD}/$6.png") \
> "$FIFO_UEBERZUG"
}
function epub_preview() {
if [ ! -f "/tmp$PWD/$6.png" ]; then
epub-thumbnailer "$6" "/tmp$PWD/$6.png" 1024
fi
declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
[x]="$2" [y]="$3" [width]="$4" [height]="$5" \
[path]="/tmp$PWD/$6.png") \
> "$FIFO_UEBERZUG"
}
# clear preview image
function clear_preview() {
declare -p -A cmd=([action]=remove [identifier]="$ID_PREVIEW") \
> "$FIFO_UEBERZUG"
}
# Check all the dependencies that are needed to show all the file previews.
# The reason why we are sending a notification incase a dependency does not
# exist is because that is the easiest way to get the user's attention.
dependencies=(ffmpeg ffmpegthumbnailer fontpreview pdftoppm epub-thumbnailer)
for dependency in "${dependencies[@]}"; do
type -p "$dependency" &>/dev/null || {
notify-send "vifm" "Could not find '${dependency}', is it installed?"
exit 1
}
done
# Make sure ueberzug's fifo exists
if [ -e "$FIFO_UEBERZUG" ]; then
# Make a temp dir for rendering if not exists
[ ! -d "/tmp${PWD}/" ] && mkdir -p "/tmp${PWD}/"
case "$1" in
draw) draw "$@" ;;
font) font_preview "$@" ;;
pdf) pdf_preview "$@" ;;
video) video_preview "$@" ;;
clear) clear_preview ;;
audio) audio_preview "$@" ;;
epub) epub_preview "$@" ;;
esac
fi
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