Scripts used to get image previews used in lf with ueberzug

cleaner

#!/usr/bin/env bash

>"${UEBERZUG_FIFO}" declare -A -p cmd=( \
    [action]=remove [identifier]="$UEBERZUG_IDEN" )

previewer

#!/usr/bin/env bash

FILE="$HOME/.cache/lf/err.png"

function hash_filename {
    FILE="$HOME/.cache/lf/$(echo ${1%.*} | sed -e 's|/|\!|g').$2"
}

function draw_clear {
    >"${UEBERZUG_FIFO}" declare -A -p cmd=( \
        [action]=remove [identifier]="$UEBERZUG_IDEN" )
}

function draw_image {
#    chafa -c full -s ${3}x${2} "$1"

    >"${UEBERZUG_FIFO}" declare -A -p cmd=( \
        [action]=add [identifier]="$UEBERZUG_IDEN" \
        [x]="$4" [y]="$5" [width]="$3" [height]="$2" \
        [scaler]=fit_contain [scaling_position_x]=0.5 [scaling_position_y]=0.5 \
        [path]="$1" )

    exit 1
}

function make_video {
    if [ "${FILE}" -ot "$1" ]; then
	ffmpegthumbnailer -t 0% -q 3 -s 0 \
			  -c jpeg -i "$1" -o "${FILE}"
    fi
}

function make_pdf {
    if [ "${FILE}" -ot "$1" ]; then
	pdftoppm -png -f 1 -l 1 -jpeg -tiffcompression jpeg \
		 -scale-to-x -1 -scale-to-y 1080 \
		 -singlefile "$1" "${FILE%.png}"
    fi
}

case $(file -b --mime-type "$1") in
    text/*)
	draw_clear
	cat "$1"
	;;
    image/*)
	draw_image "$1" "$2" "$3" "$4" "$5"
	;;
    video/*)
	hash_filename "$1" "jpg"
	make_video "$1" "$2" "$3"
	draw_image "${FILE}" "$2" "$3" "$4" "$5"
	;;
    audio/*)
	draw_clear
	exiftool "$1"
	;;
    application/pdf)
	hash_filename "$1" "png"
	make_pdf "$1" "$2" "$3"
	draw_image "${FILE}" "$2" "$3" "$4" "$5"
	;;
    application/gzip|application/x-xz)
	draw_clear
	tar tf "$1"
	;;
    application/zip)
	draw_clear
	unzip -Z -1 "$1"
	;;
    application/x-sharedlib)
	draw_clear
	readelf -h "$1"
	;;
    *)
	draw_clear
	cat "$1"
	;;
esac

exit 0

startlf

#!/usr/bin/env bash

declare -r -x UEBERZUG_FIFO="$(mktemp --dry-run --suffix "lf-$$-ueberzug")"
declare -r -x UEBERZUG_IDEN="${UEBERZUG_FIFO#*.}"
declare -r -x PREVIEW_TMP="$(mktemp -d --suffix "lf-$$-ueberzug")"

function check_cache {
    if [ ! -d "$HOME/.cache/lf" ]; then
        mkdir -p "$HOME/.cache/lf"
    fi
}

function start_ueberzug {
    mkfifo "${UEBERZUG_FIFO}"
    <"${UEBERZUG_FIFO}" ueberzug layer --parser bash --silent &
    3> "${UEBERZUG_FIFO}" exec
}

function remove_temp {
    rm "${UEBERZUG_FIFO}"
    rm -r "${PREVIEW_TMP}"
}


check_cache
start_ueberzug
lf "$@"
remove_temp