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|
#!/usr/bin/env bash
bgroot="$XDG_DATA_HOME/wayland"
bgdesk="$bgroot/desktop"
bglock="$bgroot/lockscreen"
walldir="$HOME/pix/wall"
die()
{
command -v notify-send > /dev/null &&
notify-send " cwall" "$1"
printf "\033[31;1merr: %b\033[0m\n" "$1" 1>&2
exit "${2:-1}"
}
usage()
{
echo 'Usage: cwall [wallpaper.img|directory]'
}
mimetype()
{
file --brief --dereference --mime-type "$1"
}
randimg()
{
# usage: randbg dir
: "${1:?}"
maxattempts=10
attempt=0
img=
while :; do
img="$(find "$1" \
-iname "*.avif" \
-o -iname "*.heic" \
-o -iname "*.heif" \
-o -iname "*.jpeg" \
-o -iname "*.jpg" \
-o -iname "*.jxl" \
-o -iname "*.png" \
-o -iname "*.webp" | shuf -n1)"
[ -z "$img" ] &&
return 1
# make sure the file is an actual image
case "$(mimetype "$img")" in
"image/"*)
echo "$img"
break
;;
*)
attempt=$((attempt + 1))
[ "$attempt" -gt "$maxattempts" ] &&
return 1
esac
done
}
updatewall()
{
: "${1:?}"
rm -f "$bgdesk" "$bglock"
cp "$1" "$bgdesk"
swaymsg "output * background '${bgdesk}' fill"
ffmpeg -loglevel quiet -i "$bgdesk" -vf "boxblur=50" -f mjpeg "$bglock"
}
########
# MAIN #
########
if [ "$#" -eq 0 ]; then
input="$walldir"
elif [ "$1" = "-h" ]; then
usage && exit 0
else
input="$1"
fi
if [ ! -r "$input" ]; then
die "can't read $input"
fi
if [ ! -d "$bgroot" ]; then
mkdir -p "$bgroot"
fi
case "$(mimetype "$input")" in
"image/"*)
updatewall "$input"
;;
"inode/directory")
if ! img=$(randimg "$input"); then
die "no image file in $input"
fi
updatewall "$img"
;;
*)
die "invalid input $input"
;;
esac
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