[sway] Improve toggle_touchpad

To take into account disabled_on_external_mouse

sway/toggle_touchpad

@@ -1,3 +1,14 @@
 #!/bin/sh
 
-swaymsg 'input type:touchpad events toggle enabled disabled'
+current_state() {
+	swaymsg -t get_inputs | jq -r 'map(select(.type == "touchpad")) | .[0].libinput.send_events'
+}
+set_state() {
+	swaymsg "input type:touchpad events $@"
+}
+
+if [ "$(current_state)" == disabled_on_external_mouse ]; then
+	set_state disabled
+else
+	set_state toggle enabled disabled
+fi