Save and restore window layout

This script is originated from this askubuntu.com post. Calibration function was added to determine offsets to correct for window manger elements. The offsets are applied when saving windows so the restored windows end up in the same position. Added the ability to save and restore desktop placement for each window.

Requirements

This script is compatible with python2.7 and python3.x and should run without changes on either of versions. The script is using wmctrl and ps utilities and these should installed by default on any system. If they are not installed, on Ubuntu or Debian use

sudo apt-get install wmctrl procps

The script is also using xmessage utility to perform calibration. The xmessage is located in x11-utils package on Ubuntu and should be installed by default.

How to use

First run with -calibrate flag

python3 savelayout.py -calibrate
xof= -2
yof= -52

This will perform calibration run and save calibration string into the configuration file. All of the saved window positions will be erased from the configuration file.
To save window placements first position your windows as you like them, then run

python3 savelayout.py -save

To restore layout, run with -load or without any parameters

python3 savelayout.py -load

The utility should be able to read the configuration file without the calibration string. To save the calibration string run:

python3 savelayout.py -load
python3 savelayout.py -calibrate
python3 savelayout.py -save