Let WSL use synchronize with Windows backgrounds

winbackground.py

#!/usr/bin/env python
from __future__ import division

import time
import os
import threading
import subprocess

from wand.image import Image
from watchdog.events import FileSystemEventHandler
from watchdog.observers import Observer

BACKGROUND = '/mnt/c/Users/Quantum/AppData/Roaming/Microsoft/Windows/Themes/TranscodedWallpaper'
RESULT = '/home/quantum/.config/i3/background.png'
WIDTH = 1600
HEIGHT = 860
REAL_HEIGHT = 900

background_dir = os.path.dirname(BACKGROUND)
debounce = threading.Event()


class EventHandler(FileSystemEventHandler):
    def on_modified(self, event):
        if event.src_path == BACKGROUND:
            debounce.set()


def update_wallpaper():
    with Image(filename=BACKGROUND) as img:
        w, h = img.size
        scale = max(WIDTH / w, REAL_HEIGHT / h)
        left = (w * scale - WIDTH) / 2
        top = (h * scale - REAL_HEIGHT * 2 + HEIGHT) / 2
        img.resize(int(w * scale), int(h * scale))
        img.crop(left=int(left), top=int(top), width=WIDTH, height=HEIGHT)
        img.save(filename=RESULT)
    subprocess.call(['feh', '--bg-fill', RESULT])


def main():
    handler = EventHandler()
    observer = Observer()
    observer.schedule(handler, background_dir)
    observer.start()
    update_wallpaper()
    try:
        while True:
            while not debounce.wait(86400):
                pass
            debounce.clear()
            while debounce.wait(0.2):
                debounce.clear()
            update_wallpaper()
    except KeyboardInterrupt:
        observer.stop()
    observer.join()

if __name__ == '__main__':
    main()