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#!/usr/bin/env python3
import argparse
import dbus
NAME = 'org.gnome.Mutter.DebugControl'
INTERFACE = 'org.gnome.Mutter.DebugControl'
OBJECT_PATH = '/org/gnome/Mutter/DebugControl'
PROPS_IFACE = 'org.freedesktop.DBus.Properties'
def bool_to_string(value):
if value:
return "true"
else:
return "false"
def string_to_bool(value):
if value == "true":
return True
if value == "false":
return False
raise BaseException(f"bad boolean value: {value}")
def value_to_string(value):
if isinstance(value, dbus.Boolean):
return bool_to_string(value)
return f"{value}"
def string_to_value(current, value):
if isinstance(current, dbus.Boolean):
return dbus.Boolean(string_to_bool(value), variant_level=1)
if isinstance(current, dbus.UInt32):
return dbus.UInt32(int(value), variant_level=1)
return value
def get_debug_control():
bus = dbus.SessionBus()
try:
debug_control = bus.get_object(NAME, OBJECT_PATH)
except dbus.exceptions.DBusException:
print("The DebugControl service is not available.")
print("You may have to enable the `debug-control` flag in looking glass.")
exit(-1)
return debug_control
def status():
debug_control = get_debug_control()
props = debug_control.GetAll(INTERFACE, dbus_interface=PROPS_IFACE)
for prop, value in props.items():
value = value_to_string (value)
print(f"{prop}: {value}")
def enable(prop):
debug_control = get_debug_control()
debug_control.Set(INTERFACE, prop, dbus.Boolean(True, variant_level=1),
dbus_interface=PROPS_IFACE)
def disable(prop):
debug_control = get_debug_control()
debug_control.Set(INTERFACE, prop, dbus.Boolean(False, variant_level=1),
dbus_interface=PROPS_IFACE)
def toggle(prop):
debug_control = get_debug_control()
value = debug_control.Get(INTERFACE, prop, dbus_interface=PROPS_IFACE)
debug_control.Set(INTERFACE, prop, dbus.Boolean(not value, variant_level=1),
dbus_interface=PROPS_IFACE)
def set_value(kv):
debug_control = get_debug_control()
[prop, value] = kv
current = debug_control.Get(INTERFACE, prop, dbus_interface=PROPS_IFACE)
value = string_to_value (current, value)
debug_control.Set(INTERFACE, prop, value, dbus_interface=PROPS_IFACE)
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Get and set debug state')
parser.add_argument('--status', action='store_true')
parser.add_argument('--enable', metavar='PROPERTY', type=str, nargs='?')
parser.add_argument('--disable', metavar='PROPERTY', type=str, nargs='?')
parser.add_argument('--toggle', metavar='PROPERTY', type=str, nargs='?')
parser.add_argument('--set', metavar=('PROPERTY', 'VALUE'), type=str, nargs=2)
args = parser.parse_args()
if args.status:
status()
elif args.enable:
enable(args.enable)
elif args.disable:
disable(args.disable)
elif args.toggle:
toggle(args.toggle)
elif args.set:
set_value(args.set)
else:
parser.print_usage()
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