mirror of
https://github.com/keymanapp/keyman.git
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107 lines
4 KiB
Python
107 lines
4 KiB
Python
#!/usr/bin/python3
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import contextlib
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import logging
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import os
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import subprocess
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import dbus
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import dbus.bus
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import dbus.mainloop.glib
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import dbus.service
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from dbus import DBusException
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BUS_NAME = 'com.Keyman.Config'
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OBJECT_PATH = '/com/Keyman/Config'
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DBusSessionBusAddressValue = f'unix:path=/run/user/{os.environ.get("SUDO_UID")}/bus'
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DBusSessionBusAddress = f'DBUS_SESSION_BUS_ADDRESS={DBusSessionBusAddressValue}'
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XdgRuntimeDir = f'XDG_RUNTIME_DIR=/run/user/{os.environ.get("SUDO_UID")}'
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__keyman_config_service = None
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class KeymanConfigService(dbus.service.Object):
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def __init__(self, bus, handler) -> None:
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self.__keyboard_list_changed_handler = handler
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self.__bus = bus
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bus_name = dbus.service.BusName(BUS_NAME, bus=self.__bus, do_not_queue=True)
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dbus.service.Object.__init__(self, bus_name, OBJECT_PATH)
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@dbus.service.signal(BUS_NAME)
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def KeyboardListChangedSignal(self):
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pass
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@dbus.service.method(BUS_NAME)
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def keyboard_list_changed(self):
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logging.debug(f"{os.getpid()}: -------------keyboard_list_changed--------------------")
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if self.__keyboard_list_changed_handler:
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self.__keyboard_list_changed_handler()
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self.KeyboardListChangedSignal()
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def keyboard_list_changed():
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if os.environ.get('SUDO_USER'):
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args = ['sudo', '-u', os.environ.get('SUDO_USER'), 'dbus-send',
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f'--bus={DBusSessionBusAddressValue}',
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'/com/Keyman/Config', 'com.Keyman.Config.keyboard_list_changed']
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subprocess.run(args)
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else:
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get_keyman_config_service().keyboard_list_changed()
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class KeymanConfigServiceManager:
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def __init__(self, handler):
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self.__name_owner_watch = None
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self.__signal_receiver = None
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self.__service = None
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self.__keyboard_list_changed_handler = handler
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loop = dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
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self.__bus = dbus.SessionBus(loop)
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self.__name_owner_watch = self.__bus.watch_name_owner(BUS_NAME, self.__name_owner_changed)
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def __is_name_owner(self) -> bool:
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retval = self.__bus.request_name(BUS_NAME, dbus.bus.NAME_FLAG_DO_NOT_QUEUE)
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return retval in [
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dbus.bus.REQUEST_NAME_REPLY_ALREADY_OWNER,
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dbus.bus.REQUEST_NAME_REPLY_PRIMARY_OWNER,
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]
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def __create_service(self) -> None:
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if self.__signal_receiver:
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self.__signal_receiver.remove()
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self.__signal_receiver = None
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if self.__is_name_owner():
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logging.debug(f'{os.getpid()}: I am now owner ({self.__bus.get_name_owner(BUS_NAME)})')
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if self.__name_owner_watch:
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self.__name_owner_watch.cancel()
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self.__name_owner_watch = None
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self.__service = KeymanConfigService(self.__bus, self.__keyboard_list_changed_handler)
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else:
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logging.debug(f'{os.getpid()}: Not owner. Owner is {self.__bus.get_name_owner(BUS_NAME)}. Connecting signal')
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self.__service = self.__bus.get_object(BUS_NAME, OBJECT_PATH, introspect=False)
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if self.__keyboard_list_changed_handler:
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self.__signal_receiver = self.__service.connect_to_signal(
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'KeyboardListChangedSignal', self.__keyboard_list_changed_handler, dbus_interface=BUS_NAME)
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def __name_owner_changed(self, new_owner) -> None:
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logging.debug(f'{os.getpid()}: Owner changed. Recreating service.')
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self.__create_service()
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def __verify_service_exists(self) -> None:
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if not self.__service:
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self.__create_service()
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def keyboard_list_changed(self) -> None:
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self.__verify_service_exists()
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if not self.__service:
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return
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with contextlib.suppress(DBusException):
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self.__service.keyboard_list_changed()
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def get_keyman_config_service(handler=None) -> KeymanConfigServiceManager:
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global __keyman_config_service
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if not __keyman_config_service:
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__keyman_config_service = KeymanConfigServiceManager(handler)
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return __keyman_config_service
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