Add marquee.sh script

1 files changed, 48 insertions, 0 deletions

diff --git a/scripts/.local/bin/personal/external/marquee.sh b/scripts/.local/bin/personal/external/marquee.sh
new file mode 100755
index 0000000..e2157c9
--- /dev/null
+++ b/scripts/.local/bin/personal/external/marquee.sh
@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+delay=0.2
+fixed=0
+l=0 l2=0 w2=0
+while getopts 'fw:d:h' o; do
+
+	case $o in
+	d) delay="$OPTARG" ;;
+	f) fixed=1 ;;
+	w) w="$((OPTARG))" ;;
+	h) nr=1 ;&
+	*)
+		cat >&2 <<EOF
+Usage: $0 [ -h | [ [opts] [text ...] ]
+
+Prints [text ...] as a scrolling marquee
+
+Options:
+	-f     fix width: do not change on SIGWINCH
+	-w n   set width: do not detect (implies -f)
+	-d n   set delay: see documentation on Bash's \`sleep\`
+	-h     see this help
+EOF
+		exit $((1 - nr))
+		;;
+	esac
+
+done
+shift "$((OPTIND - 1))"
+pre="$*"
+
+if ((w == 0)); then
+	winch_handler() {
+		w="$(tput cols)"
+		s="$(printf "%${w}s" "$pre")"
+	}
+	winch_handler
+	((fixed != 1)) && trap "winch_handler" SIGWINCH
+else
+	s="$(printf "%${w}s" "$pre")"
+fi
+
+while sleep "$delay"; do
+	printf '%s\r' "${s:$l:$w}${s:$l2:$w2}"
+	((l = (l + 1) % ${#s}))
+	((l2 = (l - ${#s}) > 0 ? (l - ${#s}) : 0))
+	((w2 = (l + w - ${#s}) > 0 ? (l + w - ${#s}) : 0))
+done