mouse_follows_focus.sh

# Customise this to allow things to have the mouse but not the keyboard.
# It's just regex and matches this window name.
ALLOWED='^(i3(bar\ .*)?|)$'

REPEAT=false
while true; do
	eval $(xdotool getmouselocation --shell)

	# Uncomment for helping data to use when editing $ALLOWED.

	# echo "-----------"
	# echo "Mouse Window:     " $WINDOW
	# echo "Mouse Window Name:" "$(xdotool getwindowname $WINDOW)"
	# echo "Active Window:    " "$(xdotool getactivewindow)"
	# echo

	if [[
		$WINDOW -ne 0 &&
		! ( "$(xdotool getwindowname $WINDOW)" =~ $ALLOWED ) &&
		$WINDOW -ne $(xdotool getactivewindow)
	]]; then
		# Repeat to prevent timing errors due to changes between calls to xdotool
		if $REPEAT; then xdotool getactivewindow mousemove -w %1 --polar 0 0; fi
		REPEAT=true
	else
		sleep 0.1
		REPEAT=false
	fi
done