3-4-placement.py

#!/usr/bin/env python3

# Author: Serg Kolo
# Date: Oct 3rd, 2016
# Description: Script for aligning the center of 
#     user's active window with the center of the monitor
# Tested on: Ubuntu 16.04

from __future__ import print_function
from gi.repository import Gdk,Gio
import subprocess
import sys

def gsettings_get(schema, path, key):
    """Get value of gsettings schema"""
    if path is None:
        gsettings = Gio.Settings.new(schema)
    else:
        gsettings = Gio.Settings.new_with_path(schema, path)
    return gsettings.get_value(key)


def get_x_offset():
    schema = 'org.compiz.unityshell'
    path = '/org/compiz/profiles/unity/plugins/unityshell/'
    key = 'icon-size'
    return gsettings_get(schema,path,key)

def get_y_offset(*args):
    command = ['xprop','-notype','_NET_FRAME_EXTENTS',
               '-id',str(args[0])
    ]

    out = subprocess.check_output(command)
    return int(out.decode().strip().split(',')[-2])

def main():

    screen = Gdk.Screen.get_default()
    window = screen.get_active_window()
    window.unmaximize()
    window_width = window.get_width()
    window_height = window.get_height()
    window_y = window.get_origin()[-1]
    window_monitor = screen.get_monitor_at_window(window)
    monitor_width = screen.get_monitor_geometry(window_monitor).width
    x_offset =  int(str(get_x_offset()))
    new_width = int(float(sys.argv[1]) * (monitor_width - x_offset))
    print(monitor_width,new_width)
    window.resize(new_width,window_height)
    window.process_all_updates()


if __name__ == '__main__':
    main()