gajim-plural/plugins/dbus_plugin/plugin.py

# -*- coding: utf-8 -*-

## Copyright (C) 2005-2006 Yann Leboulanger <asterix@lagaule.org>
## Copyright (C) 2005-2006 Nikos Kouremenos <kourem@gmail.com>
## Copyright (C) 2005-2006 Dimitur Kirov <dkirov@gmail.com>
## Copyright (C) 2005-2006 Andrew Sayman <lorien420@myrealbox.com>
## Copyright (C) 2007 Lukas Petrovicky <lukas@petrovicky.net>
## Copyright (C) 2007 Julien Pivotto <roidelapluie@gmail.com>
## Copyright (C) 2007 Travis Shirk <travis@pobox.com>
## Copyright (C) 2008 Mateusz Biliński <mateusz@bilinski.it>
##
## This file is part of Gajim.
##
## Gajim is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published
## by the Free Software Foundation; version 3 only.
##
## Gajim is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Gajim.  If not, see <http://www.gnu.org/licenses/>.
##
'''
D-BUS Support plugin.

Based on gajim/remote_control.py

:author: Mateusz Biliński <mateusz@bilinski.it>
:since: 8th August 2008
:copyright: Copyright (2008) Mateusz Biliński <mateusz@bilinski.it>
:license: GPL
'''
import os
# import new # depricated in python3; use types instead
import types

import gobject


from gajim.common import dbus_support
if dbus_support.supported:
    import dbus
    if dbus_support:
        INTERFACE = 'org.gajim.dbusplugin.RemoteInterface'
        OBJ_PATH = '/org/gajim/dbusplugin/RemoteObject'
        SERVICE = 'org.gajim.dbusplugin'

        import dbus.service
        # type mapping

        # in most cases it is a utf-8 string
        DBUS_STRING = dbus.String

        # general type (for use in dicts, where all values should have the same type)
        DBUS_BOOLEAN = dbus.Boolean
        DBUS_DOUBLE = dbus.Double
        DBUS_INT32 = dbus.Int32
        # dictionary with string key and binary value
        DBUS_DICT_SV = lambda : dbus.Dictionary({}, signature="sv")
        # dictionary with string key and value
        DBUS_DICT_SS = lambda : dbus.Dictionary({}, signature="ss")
        # empty type (there is no equivalent of None on D-Bus, but historically gajim
        # used 0 instead)
        DBUS_NONE = lambda : dbus.Int32(0)

        def get_dbus_struct(obj):
            ''' recursively go through all the items and replace
            them with their casted dbus equivalents
            '''
            if obj is None:
                return DBUS_NONE()
            if isinstance(obj, (unicode, str)):
                return DBUS_STRING(obj)
            if isinstance(obj, int):
                return DBUS_INT32(obj)
            if isinstance(obj, float):
                return DBUS_DOUBLE(obj)
            if isinstance(obj, bool):
                return DBUS_BOOLEAN(obj)
            if isinstance(obj, (list, tuple)):
                result = dbus.Array([get_dbus_struct(i) for i in obj],
                        signature='v')
                if result == []:
                    return DBUS_NONE()
                return result
            if isinstance(obj, dict):
                result = DBUS_DICT_SV()
                for key, value in obj.items():
                    result[DBUS_STRING(key)] = get_dbus_struct(value)
                if result == {}:
                    return DBUS_NONE()
                return result
            # unknown type
            return DBUS_NONE()

        class SignalObject(dbus.service.Object):
            ''' Local object definition for /org/gajim/dbus/RemoteObject.
            (This docstring is not be visible,
            because the clients can access only the remote object.)'''

            def __init__(self, bus_name):
                self.first_show = True
                self.vcard_account = None

                # register our dbus API
                dbus.service.Object.__init__(self, bus_name, OBJ_PATH)

            @dbus.service.signal(INTERFACE, signature='av')
            def Roster(self, account_and_data):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def AccountPresence(self, status_and_account):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def ContactPresence(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def ContactAbsence(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def ContactStatus(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def NewMessage(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def Subscribe(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def Subscribed(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def Unsubscribed(self, account_and_jid):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def NewAccount(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def VcardInfo(self, account_and_vcard):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def LastStatusTime(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def OsInfo(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def GCPresence(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def GCMessage(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def RosterInfo(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def NewGmail(self, account_and_array):
                pass

            @dbus.service.signal(INTERFACE, signature='av')
            def EntityTime(self, account_and_array):
                pass

            def raise_signal(self, signal, arg):
                '''raise a signal, with a single argument of unspecified type
                Instead of obj.raise_signal("Foo", bar), use obj.Foo(bar).'''
                getattr(self, signal)(arg)

            @dbus.service.method(INTERFACE, in_signature='s', out_signature='s')
            def get_status(self, account):
                '''Returns status (show to be exact) which is the global one
                unless account is given'''
                if not account:
                    # If user did not ask for account, returns the global status
                    return DBUS_STRING(helpers.get_global_show())
                # return show for the given account
                index = gajim.connections[account].connected
                return DBUS_STRING(gajim.SHOW_LIST[index])

            @dbus.service.method(INTERFACE, in_signature='s', out_signature='s')
            def get_status_message(self, account):
                '''Returns status which is the global one
                unless account is given'''
                if not account:
                    # If user did not ask for account, returns the global status
                    return DBUS_STRING(str(helpers.get_global_status()))
                # return show for the given account
                status = gajim.connections[account].status
                return DBUS_STRING(status)

            def _get_account_and_contact(self, account, jid):
                '''get the account (if not given) and contact instance from jid'''
                connected_account = None
                contact = None
                accounts = gajim.contacts.get_accounts()
                # if there is only one account in roster, take it as default
                # if user did not ask for account
                if not account and len(accounts) == 1:
                    account = accounts[0]
                if account:
                    if gajim.connections[account].connected > 1: # account is connected
                        connected_account = account
                        contact = gajim.contacts.get_contact_with_highest_priority(account,
                                jid)
                else:
                    for account in accounts:
                        contact = gajim.contacts.get_contact_with_highest_priority(account,
                                jid)
                        if contact and gajim.connections[account].connected > 1:
                            # account is connected
                            connected_account = account
                            break
                if not contact:
                    contact = jid

                return connected_account, contact

            def _get_account_for_groupchat(self, account, room_jid):
                '''get the account which is connected to groupchat (if not given)
                or check if the given account is connected to the groupchat'''
                connected_account = None
                accounts = gajim.contacts.get_accounts()
                # if there is only one account in roster, take it as default
                # if user did not ask for account
                if not account and len(accounts) == 1:
                    account = accounts[0]
                if account:
                    if gajim.connections[account].connected > 1 and \
                    room_jid in gajim.gc_connected[account] and \
                    gajim.gc_connected[account][room_jid]:
                        # account and groupchat are connected
                        connected_account = account
                else:
                    for account in accounts:
                        if gajim.connections[account].connected > 1 and \
                        room_jid in gajim.gc_connected[account] and \
                        gajim.gc_connected[account][room_jid]:
                            # account and groupchat are connected
                            connected_account = account
                            break
                return connected_account

            @dbus.service.method(INTERFACE, in_signature='sss', out_signature='b')
            def send_file(self, file_path, jid, account):
                '''send file, located at 'file_path' to 'jid', using account
                (optional) 'account' '''
                jid = self._get_real_jid(jid, account)
                connected_account, contact = self._get_account_and_contact(account, jid)

                if connected_account:
                    if file_path[:7] == 'file://':
                        file_path=file_path[7:]
                    if os.path.isfile(file_path): # is it file?
                        gajim.interface.instances['file_transfers'].send_file(
                                connected_account, contact, file_path)
                        return DBUS_BOOLEAN(True)
                return DBUS_BOOLEAN(False)

            def _send_message(self, jid, message, keyID, account, type = 'chat',
            subject = None):
                '''can be called from send_chat_message (default when send_message)
                or send_single_message'''
                if not jid or not message:
                    return DBUS_BOOLEAN(False)
                if not keyID:
                    keyID = ''

                connected_account, contact = self._get_account_and_contact(account, jid)
                if connected_account:
                    connection = gajim.connections[connected_account]
                    connection.send_message(jid, message, keyID, type, subject)
                    return DBUS_BOOLEAN(True)
                return DBUS_BOOLEAN(False)

            @dbus.service.method(INTERFACE, in_signature='ssss', out_signature='b')
            def send_chat_message(self, jid, message, keyID, account):
                '''Send chat 'message' to 'jid', using account (optional) 'account'.
                if keyID is specified, encrypt the message with the PGP key '''
                jid = self._get_real_jid(jid, account)
                return self._send_message(jid, message, keyID, account)

            @dbus.service.method(INTERFACE, in_signature='sssss', out_signature='b')
            def send_single_message(self, jid, subject, message, keyID, account):
                '''Send single 'message' to 'jid', using account (optional) 'account'.
                if keyID is specified, encrypt the message with the PGP key '''
                jid = self._get_real_jid(jid, account)
                return self._send_message(jid, message, keyID, account, type, subject)

            @dbus.service.method(INTERFACE, in_signature='sss', out_signature='b')
            def send_groupchat_message(self, room_jid, message, account):
                '''Send 'message' to groupchat 'room_jid',
                using account (optional) 'account'.'''
                if not room_jid or not message:
                    return DBUS_BOOLEAN(False)
                connected_account = self._get_account_for_groupchat(account, room_jid)
                if connected_account:
                    connection = gajim.connections[connected_account]
                    connection.send_gc_message(room_jid, message)
                    return DBUS_BOOLEAN(True)
                return DBUS_BOOLEAN(False)

            @dbus.service.method(INTERFACE, in_signature='ss', out_signature='b')
            def open_chat(self, jid, account):
                '''Shows the tabbed window for new message to 'jid', using account
                (optional) 'account' '''
                if not jid:
                    raise MissingArgument
                    return DBUS_BOOLEAN(False)
                jid = self._get_real_jid(jid, account)
                try:
                    jid = helpers.parse_jid(jid)
                except:
                    # Jid is not conform, ignore it
                    return DBUS_BOOLEAN(False)

                if account:
                    accounts = [account]
                else:
                    accounts = gajim.connections.keys()
                    if len(accounts) == 1:
                        account = accounts[0]
                connected_account = None
                first_connected_acct = None
                for acct in accounts:
                    if gajim.connections[acct].connected > 1: # account is  online
                        contact = gajim.contacts.get_first_contact_from_jid(acct, jid)
                        if gajim.interface.msg_win_mgr.has_window(jid, acct):
                            connected_account = acct
                            break
                        # jid is in roster
                        elif contact:
                            connected_account = acct
                            break
                        # we send the message to jid not in roster, because account is
                        # specified, or there is only one account
                        elif account:
                            connected_account = acct
                        elif first_connected_acct is None:
                            first_connected_acct = acct

                # if jid is not a conntact, open-chat with first connected account
                if connected_account is None and first_connected_acct:
                    connected_account = first_connected_acct

                if connected_account:
                    gajim.interface.new_chat_from_jid(connected_account, jid)
                    # preserve the 'steal focus preservation'
                    win = gajim.interface.msg_win_mgr.get_window(jid,
                            connected_account).window
                    if win.get_property('visible'):
                        win.window.focus()
                    return DBUS_BOOLEAN(True)
                return DBUS_BOOLEAN(False)

            @dbus.service.method(INTERFACE, in_signature='sss', out_signature='b')
            def change_status(self, status, message, account):
                ''' change_status(status, message, account). account is optional -
                if not specified status is changed for all accounts. '''
                if status not in ('offline', 'online', 'chat',
                        'away', 'xa', 'dnd', 'invisible'):
                    return DBUS_BOOLEAN(False)
                if account:
                    gobject.idle_add(gajim.interface.roster.send_status, account,
                            status, message)
                else:
                    # account not specified, so change the status of all accounts
                    for acc in gajim.contacts.get_accounts():
                        if not gajim.config.get_per('accounts', acc,
                        'sync_with_global_status'):
                            continue
                        gobject.idle_add(gajim.interface.roster.send_status, acc,
                                status, message)
                return DBUS_BOOLEAN(False)

            @dbus.service.method(INTERFACE, in_signature='', out_signature='')
            def show_next_pending_event(self):
                '''Show the window(s) with next pending event in tabbed/group chats.'''
                if gajim.events.get_nb_events():
                    gajim.interface.systray.handle_first_event()

            @dbus.service.method(INTERFACE, in_signature='', out_signature='as')
            def list_accounts(self):
                '''list register accounts'''
                result = gajim.contacts.get_accounts()
                result_array = dbus.Array([], signature='s')
                if result and len(result) > 0:
                    for account in result:
                        result_array.append(DBUS_STRING(account))
                return result_array

            @dbus.service.method(INTERFACE, in_signature='s', out_signature='a{ss}')
            def account_info(self, account):
                '''show info on account: resource, jid, nick, prio, message'''
                result = DBUS_DICT_SS()
                if account in gajim.connections:
                    # account is valid
                    con = gajim.connections[account]
                    index = con.connected
                    result['status'] = DBUS_STRING(gajim.SHOW_LIST[index])
                    result['name'] = DBUS_STRING(con.name)
                    result['jid'] = DBUS_STRING(gajim.get_jid_from_account(con.name))
                    result['message'] = DBUS_STRING(con.status)
                    result['priority'] = DBUS_STRING(unicode(con.priority))
                    result['resource'] = DBUS_STRING(unicode(gajim.config.get_per(
                            'accounts', con.name, 'resource')))
                return result

            @dbus.service.method(INTERFACE, in_signature='s', out_signature='aa{sv}')
            def list_contacts(self, account):
                '''list all contacts in the roster. If the first argument is specified,
                then return the contacts for the specified account'''
                result = dbus.Array([], signature='aa{sv}')
                accounts = gajim.contacts.get_accounts()
                if len(accounts) == 0:
                    return result
                if account:
                    accounts_to_search = [account]
                else:
                    accounts_to_search = accounts
                for acct in accounts_to_search:
                    if acct in accounts:
                        for jid in gajim.contacts.get_jid_list(acct):
                            item = self._contacts_as_dbus_structure(
                                    gajim.contacts.get_contacts(acct, jid))
                            if item:
                                result.append(item)
                return result

            @dbus.service.method(INTERFACE, in_signature='', out_signature='')
            def toggle_roster_appearance(self):
                ''' shows/hides the roster window '''
                win = gajim.interface.roster.window
                if win.get_property('visible'):
                    gobject.idle_add(win.hide)
                else:
                    win.present()
                    # preserve the 'steal focus preservation'
                    if self._is_first():
                        win.window.focus()
                    else:
                        win.window.focus(long(time()))

            @dbus.service.method(INTERFACE, in_signature='', out_signature='')
            def toggle_ipython(self):
                ''' shows/hides the ipython window '''
                win = gajim.ipython_window
                if win:
                    if win.window.is_visible():
                        gobject.idle_add(win.hide)
                    else:
                        win.show_all()
                        win.present()
                else:
                    gajim.interface.create_ipython_window()

            @dbus.service.method(INTERFACE, in_signature='', out_signature='a{ss}')
            def prefs_list(self):
                prefs_dict = DBUS_DICT_SS()
                def get_prefs(data, name, path, value):
                    if value is None:
                        return
                    key = ''
                    if path is not None:
                        for node in path:
                            key += node + '#'
                    key += name
                    prefs_dict[DBUS_STRING(key)] = DBUS_STRING(value)
                gajim.config.foreach(get_prefs)
                return prefs_dict

            @dbus.service.method(INTERFACE, in_signature='', out_signature='b')
            def prefs_store(self):
                try:
                    gajim.interface.save_config()
                except Exception:
                    return DBUS_BOOLEAN(False)
                return DBUS_BOOLEAN(True)

            @dbus.service.method(INTERFACE, in_signature='s', out_signature='b')
            def prefs_del(self, key):
                if not key:
                    return DBUS_BOOLEAN(False)
                key_path = key.split('#', 2)
                if len(key_path) != 3:
                    return DBUS_BOOLEAN(False)
                if key_path[2] == '*':
                    gajim.config.del_per(key_path[0], key_path[1])
                else:
                    gajim.config.del_per(key_path[0], key_path[1], key_path[2])
                return DBUS_BOOLEAN(True)

            @dbus.service.method(INTERFACE, in_signature='s', out_signature='b')
            def prefs_put(self, key):
                if not key:
                    return DBUS_BOOLEAN(False)
                key_path = key.split('#', 2)
                if len(key_path) < 3:
                    subname, value = key.split('=', 1)
                    gajim.config.set(subname, value)
                    return DBUS_BOOLEAN(True)
                subname, value = key_path[2].split('=', 1)
                gajim.config.set_per(key_path[0], key_path[1], subname, value)
                return DBUS_BOOLEAN(True)

            @dbus.service.method(INTERFACE, in_signature='ss', out_signature='b')
            def add_contact(self, jid, account):
                if account:
                    if account in gajim.connections and \
                            gajim.connections[account].connected > 1:
                        # if given account is active, use it
                        AddNewContactWindow(account = account, jid = jid)
                    else:
                        # wrong account
                        return DBUS_BOOLEAN(False)
                else:
                    # if account is not given, show account combobox
                    AddNewContactWindow(account = None, jid = jid)
                return DBUS_BOOLEAN(True)

            @dbus.service.method(INTERFACE, in_signature='ss', out_signature='b')
            def remove_contact(self, jid, account):
                jid = self._get_real_jid(jid, account)
                accounts = gajim.contacts.get_accounts()

                # if there is only one account in roster, take it as default
                if account:
                    accounts = [account]
                contact_exists = False
                for account in accounts:
                    contacts = gajim.contacts.get_contacts(account, jid)
                    if contacts:
                        gajim.connections[account].unsubscribe(jid)
                        for contact in contacts:
                            gajim.interface.roster.remove_contact(contact, account)
                        gajim.contacts.remove_jid(account, jid)
                        contact_exists = True
                return DBUS_BOOLEAN(contact_exists)

            def _is_first(self):
                if self.first_show:
                    self.first_show = False
                    return True
                return False

            def _get_real_jid(self, jid, account = None):
                '''get the real jid from the given one: removes xmpp: or get jid from nick
                if account is specified, search only in this account
                '''
                if account:
                    accounts = [account]
                else:
                    accounts = gajim.connections.keys()
                if jid.startswith('xmpp:'):
                    return jid[5:] # len('xmpp:') = 5
                nick_in_roster = None # Is jid a nick ?
                for account in accounts:
                    # Does jid exists in roster of one account ?
                    if gajim.contacts.get_contacts(account, jid):
                        return jid
                    if not nick_in_roster:
                        # look in all contact if one has jid as nick
                        for jid_ in gajim.contacts.get_jid_list(account):
                            c = gajim.contacts.get_contacts(account, jid_)
                            if c[0].name == jid:
                                nick_in_roster = jid_
                                break
                if nick_in_roster:
                    # We have not found jid in roster, but we found is as a nick
                    return nick_in_roster
                # We have not found it as jid nor as nick, probably a not in roster jid
                return jid

            def _contacts_as_dbus_structure(self, contacts):
                ''' get info from list of Contact objects and create dbus dict '''
                if not contacts:
                    return None
                prim_contact = None # primary contact
                for contact in contacts:
                    if prim_contact is None or contact.priority > prim_contact.priority:
                        prim_contact = contact
                contact_dict = DBUS_DICT_SV()
                contact_dict['name'] = DBUS_STRING(prim_contact.name)
                contact_dict['show'] = DBUS_STRING(prim_contact.show)
                contact_dict['jid'] = DBUS_STRING(prim_contact.jid)
                if prim_contact.keyID:
                    keyID = None
                    if len(prim_contact.keyID) == 8:
                        keyID = prim_contact.keyID
                    elif len(prim_contact.keyID) == 16:
                        keyID = prim_contact.keyID[8:]
                    if keyID:
                        contact_dict['openPGP'] = keyID
                contact_dict['resources'] = dbus.Array([], signature='(sis)')
                for contact in contacts:
                    resource_props = dbus.Struct((DBUS_STRING(contact.resource),
                        dbus.Int32(contact.priority), DBUS_STRING(contact.status)))
                    contact_dict['resources'].append(resource_props)
                contact_dict['groups'] = dbus.Array([], signature='(s)')
                for group in prim_contact.groups:
                    contact_dict['groups'].append((DBUS_STRING(group),))
                return contact_dict

            @dbus.service.method(INTERFACE, in_signature='', out_signature='s')
            def get_unread_msgs_number(self):
                return DBUS_STRING(str(gajim.events.get_nb_events()))

            @dbus.service.method(INTERFACE, in_signature='s', out_signature='b')
            def start_chat(self, account):
                if not account:
                    # error is shown in gajim-remote check_arguments(..)
                    return DBUS_BOOLEAN(False)
                app.app.activate_action('start-chat')
                return DBUS_BOOLEAN(True)

            @dbus.service.method(INTERFACE, in_signature='ss', out_signature='')
            def send_xml(self, xml, account):
                if account:
                    gajim.connections[account].send_stanza(xml)
                else:
                    for acc in gajim.contacts.get_accounts():
                        gajim.connections[acc].send_stanza(xml)

            @dbus.service.method(INTERFACE, in_signature='ssss', out_signature='')
            def join_room(self, room_jid, nick, password, account):
                if not account:
                    # get the first connected account
                    accounts = gajim.connections.keys()
                    for acct in accounts:
                        if gajim.account_is_connected(acct):
                            account = acct
                            break
                    if not account:
                        return
                if not nick:
                    gajim.interface.join_gc_minimal(account, room_jid)
                else:
                    gajim.interface.join_gc_room(account, room_jid, nick, password)

from gajim.common import app
from gajim.common import helpers
from time import time
from gajim.dialogs import AddNewContactWindow, JoinGroupchatWindow

from gajim.plugins import GajimPlugin
from gajim.plugins.helpers import log_calls, log
from gajim.common import ged

class DBusPlugin(GajimPlugin):

    @log_calls('DBusPlugin')
    def init(self):
        self.description = _('D-Bus support.'
            ' Based on remote_control module from'
            '\nGajim core but uses new events handling system.')
        self.config_dialog = None
        #self.gui_extension_points = {}
        #self.config_default_values = {}

        self.events_names = ['Roster', 'AccountPresence', 'ContactPresence',
                             'ContactAbsence', 'ContactStatus', 'NewMessage',
                             'Subscribe', 'Subscribed', 'Unsubscribed',
                             'NewAccount', 'VcardInfo', 'LastStatusTime',
                             'OsInfo', 'GCPresence', 'GCMessage', 'RosterInfo',
                             'NewGmail', 'EntityTime']

        self.signal_object = None

        self.events_handlers = {}
        self._set_handling_methods()

    @log_calls('DBusPlugin')
    def activate(self):
        session_bus = dbus_support.session_bus.SessionBus()

        bus_name = dbus.service.BusName(SERVICE, bus=session_bus)
        self.signal_object = SignalObject(bus_name)

    @log_calls('DBusPlugin')
    def deactivate(self):
        self.signal_object.remove_from_connection()
        self.signal_object = None

    @log_calls('DBusPlugin')
    def _set_handling_methods(self):
        for event_name in self.events_names:
            setattr(self, event_name,
                            types.MethodType(
                                    self._generate_handling_method(event_name),
                                    self))
            self.events_handlers[event_name] = (ged.POSTCORE,
                getattr(self, event_name))

    def _generate_handling_method(self, event_name):
        def handler(self, arg):
            #print "Handler of event %s called"%(event_name)
            if self.signal_object:
                getattr(self.signal_object, event_name)(get_dbus_struct(arg))

        return handler