xlib_toggle_borderless.py

#!/usr/bin/env python3

import collections

import Xlib
import Xlib.display


Hints = collections.namedtuple("Hints", ["flags", "functions", "decorations", "inputMode", "status"])
MWM_HINTS_DECORATIONS = (1 << 1)
MWM_DECOR_ALL = (1 << 0)

display = Xlib.display.Display()
root = display.screen().root
NET_ACTIVE_WINDOW = display.intern_atom("_NET_ACTIVE_WINDOW")
MOTIF_WM_HINTS = display.intern_atom("_MOTIF_WM_HINTS")
active_id = root.get_full_property(NET_ACTIVE_WINDOW, Xlib.X.AnyPropertyType).value[0]
window = display.create_resource_object("window", active_id)
wm_hints_data = window.get_full_property(MOTIF_WM_HINTS, Xlib.X.AnyPropertyType)
if wm_hints_data is not None:
    wm_hints = Hints._make(wm_hints_data.value)
else:
    wm_hints = Hints(MWM_HINTS_DECORATIONS, 0, MWM_DECOR_ALL, 0, 0)
print(wm_hints)

wm_hints = wm_hints._replace(flags=wm_hints.flags | MWM_HINTS_DECORATIONS)
if wm_hints.decorations != 0:
    wm_hints = wm_hints._replace(decorations=0)
else:
    wm_hints = wm_hints._replace(decorations=MWM_DECOR_ALL)
window.change_property(MOTIF_WM_HINTS, MOTIF_WM_HINTS, 32, list(wm_hints))
display.flush()