| 1 | ## dbus_support.py |
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| 2 | ## |
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| 3 | ## Copyright (C) 2005 Yann Le Boulanger <asterix@lagaule.org> |
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| 4 | ## Copyright (C) 2005 Nikos Kouremenos <kourem@gmail.com> |
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| 5 | ## Copyright (C) 2005 Dimitur Kirov <dkirov@gmail.com> |
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| 6 | ## Copyright (C) 2005 Andrew Sayman <lorien420@myrealbox.com> |
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| 7 | ## |
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| 8 | ## This program is free software; you can redistribute it and/or modify |
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| 9 | ## it under the terms of the GNU General Public License as published |
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| 10 | ## by the Free Software Foundation; version 2 only. |
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| 11 | ## |
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| 12 | ## This program is distributed in the hope that it will be useful, |
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| 13 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | ## GNU General Public License for more details. |
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| 16 | ## |
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| 17 | |
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| 18 | import os |
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| 19 | |
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| 20 | from common import gajim |
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| 21 | from common import exceptions |
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| 22 | |
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| 23 | _GAJIM_ERROR_IFACE = 'org.gajim.dbus.Error' |
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| 24 | |
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| 25 | try: |
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| 26 | import dbus |
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| 27 | import dbus.service |
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| 28 | import dbus.glib |
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| 29 | supported = True # does use have D-Bus bindings? |
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| 30 | except ImportError: |
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| 31 | supported = False |
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| 32 | if not os.name == 'nt': # only say that to non Windows users |
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| 33 | print _('D-Bus python bindings are missing in this computer') |
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| 34 | print _('D-Bus capabilities of Gajim cannot be used') |
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| 35 | |
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| 36 | class SystemBus: |
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| 37 | '''A Singleton for the DBus SystemBus''' |
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| 38 | def __init__(self): |
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| 39 | self.system_bus = None |
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| 40 | |
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| 41 | def SystemBus(self): |
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| 42 | if not supported: |
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| 43 | raise exceptions.DbusNotSupported |
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| 44 | |
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| 45 | if not self.present(): |
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| 46 | raise exceptions.SystemBusNotPresent |
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| 47 | return self.system_bus |
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| 48 | |
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| 49 | def bus(self): |
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| 50 | return self.SystemBus() |
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| 51 | |
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| 52 | def present(self): |
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| 53 | if not supported: |
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| 54 | return False |
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| 55 | if self.system_bus is None: |
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| 56 | try: |
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| 57 | self.system_bus = dbus.SystemBus() |
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| 58 | except dbus.DBusException: |
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| 59 | self.system_bus = None |
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| 60 | return False |
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| 61 | if self.system_bus is None: |
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| 62 | return False |
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| 63 | # Don't exit Gajim when dbus is stopped |
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| 64 | self.system_bus.set_exit_on_disconnect(False) |
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| 65 | return True |
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| 66 | |
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| 67 | system_bus = SystemBus() |
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| 68 | |
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| 69 | class SessionBus: |
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| 70 | '''A Singleton for the D-Bus SessionBus''' |
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| 71 | def __init__(self): |
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| 72 | self.session_bus = None |
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| 73 | |
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| 74 | def SessionBus(self): |
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| 75 | if not supported: |
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| 76 | raise exceptions.DbusNotSupported |
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| 77 | |
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| 78 | if not self.present(): |
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| 79 | raise exceptions.SessionBusNotPresent |
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| 80 | return self.session_bus |
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| 81 | |
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| 82 | def bus(self): |
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| 83 | return self.SessionBus() |
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| 84 | |
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| 85 | def present(self): |
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| 86 | if not supported: |
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| 87 | return False |
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| 88 | if self.session_bus is None: |
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| 89 | try: |
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| 90 | self.session_bus = dbus.SessionBus() |
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| 91 | except dbus.DBusException: |
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| 92 | self.session_bus = None |
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| 93 | return False |
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| 94 | if self.session_bus is None: |
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| 95 | return False |
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| 96 | return True |
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| 97 | |
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| 98 | session_bus = SessionBus() |
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| 99 | |
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| 100 | def get_interface(interface, path): |
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| 101 | '''Returns an interface on the current SessionBus. If the interface isn't |
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| 102 | running, it tries to start it first.''' |
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| 103 | if not supported: |
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| 104 | return None |
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| 105 | if session_bus.present(): |
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| 106 | bus = session_bus.SessionBus() |
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| 107 | else: |
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| 108 | return None |
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| 109 | try: |
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| 110 | obj = bus.get_object('org.freedesktop.DBus', '/org/freedesktop/DBus') |
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| 111 | dbus_iface = dbus.Interface(obj, 'org.freedesktop.DBus') |
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| 112 | running_services = dbus_iface.ListNames() |
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| 113 | started = True |
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| 114 | if interface not in running_services: |
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| 115 | # try to start the service |
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| 116 | if dbus_iface.StartServiceByName(interface, dbus.UInt32(0)) == 1: |
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| 117 | started = True |
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| 118 | else: |
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| 119 | started = False |
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| 120 | if not started: |
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| 121 | return None |
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| 122 | obj = bus.get_object(interface, path) |
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| 123 | return dbus.Interface(obj, interface) |
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| 124 | except Exception, e: |
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| 125 | gajim.log.debug(str(e)) |
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| 126 | return None |
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| 127 | |
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| 128 | |
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| 129 | def get_notifications_interface(): |
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| 130 | '''Returns the notifications interface.''' |
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| 131 | return get_interface('org.freedesktop.Notifications', |
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| 132 | '/org/freedesktop/Notifications') |
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| 133 | |
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| 134 | if supported: |
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| 135 | class MissingArgument(dbus.DBusException): |
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| 136 | _dbus_error_name = _GAJIM_ERROR_IFACE + '.MissingArgument' |
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| 137 | |
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| 138 | class InvalidArgument(dbus.DBusException): |
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| 139 | '''Raised when one of the provided arguments is invalid.''' |
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| 140 | _dbus_error_name = _GAJIM_ERROR_IFACE + '.InvalidArgument' |
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