vifmimg

#!/bin/sh

PLAY_GIF="yes"
# By enabling this option the GIF will be animated, else it would show an image
# (one frame).

#PDF_PNG=1
# Uncomment to use png. Default behaviour is to use jpg (faster).

cachedir="${XDG_CACHE_HOME:-$HOME/.cache/}"/vifmimg
[ ! -d "$cachedir" ] && mkdir -p "$cachedir"
# Checks if the file has any modifications before preview
#pwd_sum="$cachedir"/"$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$PWD"/"$6")" | sha256sum | awk '{print $1}')"
img_sum="$cachedir"/"$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$PWD"/"$6")" | sha256sum | awk '{print $1}')"

image() {
      {	printf '{ "action": "add", "identifier": "vifm-preview",'
	printf '"x": %d, "y": %d, "width": %d, "height": %d,'	"$2" "$3" "$4" "$5"
	printf '"scaler": "fit_contain", "path": "%s" }\n'	"$6"
	} > "$FIFO_UEBERZUG"
	#printf '"scaler": "forced_cover", "path": "%s" }\n'	"$6"
}

# if the file doesn't exist and doesn't have a size more than 0, also sets "$1"
# to be clear so it doesn't try to make the preview
[ -n "$6" ] && [ ! -s "$6" ] && echo "The file doesn't exist or it's size is not greater than zero, exiting..." && set -- "clear"

case "$1" in
	"pid")	# sometimes you killed the windows in any other way and the
		# named pipes stay
		#find /tmp -name "^vifm-*" -type p
		find /tmp -maxdepth 1 -name 'vifm-*' -type p -delete #&& \
		echo 'Cleaning vifm named pipes...'
		;;
        "remove")
		[ -d "$cachedir" ] && rm -rf "${cachedir:?}"		;;
	"clear")
		echo '{"action": "remove", "identifier": "vifm-preview"}' > "$FIFO_UEBERZUG" ;;
	"draw")
		image "$1" "$2" "$3" "$4" "$5" "$PWD"/"$6"		;;
	"videopreview")
		# ffmpegthumbnailer uses by default the extension of the name (-o) jpg/png
		[ ! -f "$img_sum".jpg ] && \
			ffmpegthumbnailer -i "$6" -o "$img_sum".jpg -s 0 -q 10 2>/dev/null
		image "$1" "$2" "$3" "$4" "$5" "$img_sum".jpg	;;
	"epubpreview")
		[ ! -f "$img_sum".png ] && epub-thumbnailer "$6" "$img_sum".png 1024
		image "$1" "$2" "$3" "$4" "$5" "$img_sum".png	;;
	"gifpreview")
		{ [ ! -d "$img_sum"/ ] && mkdir -p "$img_sum"/ ;} \
			&& convert -coalesce "$6" "$img_sum"/"$6".png
		[ -z "$PLAY_GIF" ] && image "$1" "$2" "$3" "$4" "$5" "$img_sum"/"$6"-0.png
		[ -n "$PLAY_GIF" ] && \
		for frame in $(find "$img_sum" -maxdepth 1 -name '*.png' | sort -V); do
			image "$1" "$2" "$3" "$4" "$5" "$frame"
	            # Sleep between frames to make the animation smooth.
		    # Make it infinite loop on gif or exit on user input(?)
	            	sleep .07
	        done							;;
	"pdfpreview")
		if [ "$PDF_PNG" ]; then
			[ ! -f "$img_sum".png ] && \
				pdftoppm -f 1 -scale-to-y -1 -singlefile -png "$6" "$img_sum"
				image "$1" "$2" "$3" "$4" "$5" "$img_sum".png
		else
			[ ! -f "$img_sum".jpg ] && \
				pdftoppm -f 1 -scale-to-y -1 -singlefile -jpeg -tiffcompression jpeg "$6" "$img_sum"
				image "$1" "$2" "$3" "$4" "$5" "$img_sum".jpg
		fi ;;
        "docxpreview")
		[ ! -f "$img_sum".jpg ] && \
			soffice --headless --convert-to pdf "$PWD"/"$6" --outdir "$cachedir" >/dev/null 2>&1 && \
			pdftoppm -f 1 -scale-to-y -1 -singlefile -jpeg -tiffcompression jpeg "$cachedir"/"$(noextname "$6")".pdf "$img_sum" && \
			rm "$cachedir"/"$(noextname "$6")".pdf &
		image "$1" "$2" "$3" "$4" "$5" "$img_sum".jpg		;;
	"audiopreview")
		[ ! -f "$img_sum".png ] && \
			ffmpeg -i "$6" "$img_sum".png -y >/dev/null 2>&1
		image "$1" "$2" "$3" "$4" "$5" "$img_sum".jpg		;;
	"fontpreview")
		[ ! -f "$img_sum".png ] && \
			fontpreview -i "$6" -o "$img_sum".png
    		image "$1" "$2" "$3" "$4" "$5" "$img_sum".png		;;
	*)
		echo 'Unknown command:' "$1"
esac