Get the coordinates of the active window's top-left corner, and the window's size

window_dimensions.sh

#!/usr/bin/env bash

# https://gist.github.com/mmguero/4afe9db7d9da60c89b5145a60ba669e8

# Get the coordinates of the active window's
#    top-left corner, and the window's size.
#    This excludes the window decoration.
unset x y w h
eval $(xwininfo -id $(xdotool getactivewindow) |
  sed -n -e "s/^ \+Absolute upper-left X: \+\([0-9]\+\).*/x=\1/p" \
         -e "s/^ \+Absolute upper-left Y: \+\([0-9]\+\).*/y=\1/p" \
         -e "s/^ \+Width: \+\([0-9]\+\).*/w=\1/p" \
         -e "s/^ \+Height: \+\([0-9]\+\).*/h=\1/p" )
echo -n "$x $y $w $h"