| 1 | ## dbus_support.py |
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| 2 | ## |
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| 3 | ## Contributors for this file: |
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| 4 | ## - Andrew Sayman <lorien420@myrealbox.com> |
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| 5 | ## |
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| 6 | ## Copyright (C) 2003-2004 Yann Le Boulanger <asterix@lagaule.org> |
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| 7 | ## Vincent Hanquez <tab@snarc.org> |
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| 8 | ## Copyright (C) 2005 Yann Le Boulanger <asterix@lagaule.org> |
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| 9 | ## Vincent Hanquez <tab@snarc.org> |
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| 10 | ## Nikos Kouremenos <nkour@jabber.org> |
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| 11 | ## Dimitur Kirov <dkirov@gmail.com> |
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| 12 | ## Travis Shirk <travis@pobox.com> |
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| 13 | ## Norman Rasmussen <norman@rasmussen.co.za> |
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| 14 | ## |
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| 15 | ## This program is free software; you can redistribute it and/or modify |
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| 16 | ## it under the terms of the GNU General Public License as published |
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| 17 | ## by the Free Software Foundation; version 2 only. |
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| 18 | ## |
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| 19 | ## This program is distributed in the hope that it will be useful, |
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| 20 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 21 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 22 | ## GNU General Public License for more details. |
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| 23 | ## |
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| 24 | |
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| 25 | import os |
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| 26 | import sys |
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| 27 | |
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| 28 | from common import exceptions |
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| 29 | from common import i18n |
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| 30 | _ = i18n._ |
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| 31 | |
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| 32 | try: |
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| 33 | import dbus |
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| 34 | version = getattr(dbus, 'version', (0, 20, 0)) |
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| 35 | supported = True |
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| 36 | except ImportError: |
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| 37 | version = (0, 0, 0) |
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| 38 | supported = False |
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| 39 | if not os.name == 'nt': # only say that to non Windows users |
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| 40 | print _('D-Bus python bindings are missing in this computer') |
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| 41 | print _('D-Bus capabilities of Gajim cannot be used') |
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| 42 | |
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| 43 | # dbus 0.23 leads to segfault with threads_init() |
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| 44 | if sys.version[:4] >= '2.4' and version[1] < 30: |
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| 45 | supported = False |
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| 46 | |
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| 47 | if version >= (0, 41, 0): |
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| 48 | import dbus.service |
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| 49 | import dbus.glib # cause dbus 0.35+ doesn't return signal replies without it |
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| 50 | |
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| 51 | class SessionBus: |
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| 52 | '''A Singleton for the DBus SessionBus''' |
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| 53 | def __init__(self): |
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| 54 | self.session_bus = None |
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| 55 | |
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| 56 | def SessionBus(self): |
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| 57 | if not supported: |
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| 58 | raise exceptions.DbusNotSupported |
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| 59 | |
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| 60 | if not self.present(): |
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| 61 | raise exceptions.SessionBusNotPresent |
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| 62 | return self.session_bus |
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| 63 | |
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| 64 | def bus(self): |
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| 65 | return self.SessionBus() |
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| 66 | |
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| 67 | def present(self): |
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| 68 | if not supported: |
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| 69 | return False |
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| 70 | if self.session_bus is None: |
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| 71 | try: |
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| 72 | self.session_bus = dbus.SessionBus() |
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| 73 | except dbus.dbus_bindings.DBusException: |
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| 74 | self.session_bus = None |
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| 75 | return False |
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| 76 | if self.session_bus is None: |
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| 77 | return False |
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| 78 | return True |
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| 79 | |
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| 80 | session_bus = SessionBus() |
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| 81 | |
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| 82 | def get_interface(interface, path): |
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| 83 | '''Returns an interface on the current SessionBus. If the interface isn't |
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| 84 | running, it tries to start it first.''' |
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| 85 | if not supported: |
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| 86 | return None |
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| 87 | if session_bus.present(): |
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| 88 | bus = session_bus.SessionBus() |
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| 89 | else: |
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| 90 | return None |
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| 91 | try: |
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| 92 | obj = bus.get_object('org.freedesktop.DBus', '/org/freedesktop/DBus') |
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| 93 | dbus_iface = dbus.Interface(obj, 'org.freedesktop.DBus') |
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| 94 | running_services = dbus_iface.ListNames() |
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| 95 | started = True |
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| 96 | if interface not in running_services: |
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| 97 | # try to start the service |
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| 98 | if dbus_iface.StartServiceByName(interface, dbus.UInt32(0)) == 1: |
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| 99 | started = True |
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| 100 | else: |
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| 101 | started = False |
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| 102 | if not started: |
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| 103 | return None |
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| 104 | obj = bus.get_object(interface, path) |
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| 105 | return dbus.Interface(obj, interface) |
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| 106 | except Exception, e: |
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| 107 | print >> sys.stderr, e |
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| 108 | return None |
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| 109 | except dbus.dbus_bindings.DBusException, e: |
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| 110 | # This exception could give useful info about why notification breaks |
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| 111 | print >> sys.stderr, e |
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| 112 | return None |
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| 113 | |
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| 114 | |
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| 115 | def get_notifications_interface(): |
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| 116 | '''Returns the notifications interface.''' |
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| 117 | return get_interface('org.freedesktop.Notifications','/org/freedesktop/Notifications') |
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