1{ pkgs, ... }:
 2
 3let
 4  xrandr = "${pkgs.xorg.xrandr}/bin/xrandr";
 5  xinput = "${pkgs.xorg.xinput}/bin/xinput";
 6in
 7pkgs.writeShellScriptBin "invert"
 8  ''
 9    orientation="$(${xrandr} --query --verbose | grep eDP | cut -d ' ' -f 6)"
10    if [[ "$orientation" == "normal" ]];
11    then
12      echo "turning screen upside down..."
13      ${xrandr} -o inverted
14      ${xinput} set-prop 'ELAN9008:00 04F3:2C82' 'Coordinate Transformation Matrix' -1 0 1 0 -1 1 0 0 1
15      ${xinput} set-prop 'ELAN9008:00 04F3:2C82 Stylus Pen (0)' 'Coordinate Transformation Matrix' -1 0 1 0 -1 1 0 0 1
16      ${xinput} set-prop 'ELAN9008:00 04F3:2C82 Stylus Eraser (0)' 'Coordinate Transformation Matrix' -1 0 1 0 -1 1 0 0 1
17    else
18      echo "reverting back to normal..."
19      ${xrandr} -o normal
20      ${xinput} set-prop 'ELAN9008:00 04F3:2C82' 'Coordinate Transformation Matrix' 1 0 0 0 1 0 0 0 1
21      ${xinput} set-prop 'ELAN9008:00 04F3:2C82 Stylus Pen (0)' 'Coordinate Transformation Matrix' 1 0 0 0 1 0 0 0 1
22      ${xinput} set-prop 'ELAN9008:00 04F3:2C82 Stylus Eraser (0)' 'Coordinate Transformation Matrix' 1 0 0 0 1 0 0 0 1
23    fi
24  ''