#!/bin/bash

currentid=$(xdotool getwindowfocus)
tabbedid=$(xdotool search --class tabbed | tail -n1)
childid="$(xwininfo -id $tabbedid -children | awk 'NR==7 {print $1}')"

if [[ $currentid -eq $childid ]]; then
    xdotool windowreparent $childid "$(xwininfo -root | awk '/Window id:/ {print $4}')"
else
    xdotool windowreparent $currentid $tabbedid
fi