SessionManager.py

   1 #!/usr/bin/python
   2 """
   3 SessionManager
   4 Copyright (c) 2010--2011, Olivier Mehani <shtrom@ssji.net>
   5 All rights reserved.
   6
   7 $Id$
   8 A drop-in replacement for org.gnome.SessionManager, doing almost nothing.
   9 Loosely based on basic instructions at [0,1,2,3,5,6].
  10
  11 [0] http://people.gnome.org/~mccann/gnome-session/docs/gnome-session.html
  12 [1] http://www.amk.ca/diary/2007/04/rough_notes_python_and_dbus.html
  13 [2] http://paste.lisp.org/display/45824
  14 [3] http://www.lamalex.net/2010/03/help-does-anyone-know-how-to-export-properties-with-python-dbus/
  15 [4] http://thp.io/2007/09/x11-idle-time-and-focused-window-in.html
  16 [5] http://www.eurion.net/python-snippets/snippet/GConf%3A%20get_set%20values.html
  17 [6] http://lists.gnupg.org/pipermail/gnupg-users/2006-March/028189.html
  18
  19 Redistribution and use in source and binary forms, with or without
  20 modification, are permitted provided that the following conditions
  21 are met:
  22 1. Redistributions of source code must retain the above copyright notice, this
  23 list of conditions and the following disclaimer.
  24 2. Redistributions in binary form must reproduce the above copyright notice,
  25 this list of conditions and the following disclaimer in the documentation
  26 and/or other materials provided with the distribution.
  27 3. Neither the name of Olivier Mehani nor the names of its contributors
  28 may be used to endorse or promote products derived from this software
  29 without specific prior written permission.
  30
  31 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  32 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  33 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  34 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  35 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  36 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  37 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  38 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  39 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  40 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41 POSSIBILITY OF SUCH DAMAGE.
  42
  43 """
  44
  45 __version__ = "$Revision$"
  46
  47
  48 import dbus
  49 import dbus.service
  50 import dbus.glib
  51 import gobject
  52
  53 import gtk
  54
  55 import ctypes
  56 import os
  57
  58 import gconf
  59
  60 import signal
  61
  62
  63 ogSM    = 'org.gnome.SessionManager'
  64 ogSMp   = '/org/gnome/SessionManager'
  65 ogSMP   = 'org.gnome.SessionManager.Presence'
  66 ogSMPp  = '/org/gnome/SessionManager/Presence'
  67
  68 class SessionManager(dbus.service.Object):
  69     def __init__(self):
  70         bus_name = dbus.service.BusName(ogSM,
  71             bus=dbus.SessionBus())
  72         dbus.service.Object.__init__(self, bus_name,
  73             ogSMp)
  74         self.presence = SessionManagerPresence()
  75         #print "%s emulation ready" % ogSM
  76
  77     def get_smp(self):
  78         return self.presence
  79
  80
  81 class SessionManagerPresence(dbus.service.Object):
  82     PRESENCE_AVAILABLE  = 0
  83     PRESENCE_INVISIBLE  = 1
  84     PRESENCE_BUSY               = 2
  85     PRESENCE_IDLE               = 3
  86
  87     status                      = PRESENCE_AVAILABLE
  88     status_text         = ""
  89
  90     def __init__(self):
  91         bus_name = dbus.service.BusName(ogSMP,
  92             bus=dbus.SessionBus())
  93         dbus.service.Object.__init__(self, bus_name,
  94             ogSMPp)
  95         #print "%s emulation ready" % ogSMP
  96
  97     @dbus.service.method(dbus_interface=dbus.PROPERTIES_IFACE,
  98         in_signature='s', out_signature='a{sv}')
  99     def GetAll(self, interface_name):
 100         print "%s.GetAll(%s)" % (ogSMP, interface_name)
 101         return {'status':               dbus.UInt32(self.status),
 102             'status-text':  self.status_text,
 103             }
 104     @dbus.service.method(dbus_interface=dbus.PROPERTIES_IFACE,
 105         in_signature='ss', out_signature='v')
 106     def Get(self, interface_name, property_name):
 107         #print "%s.Get(%s, %s)" % (ogSMP, interface_name, property_name)
 108         #print " -> %s" % str(self.GetAll(interface_name)[property_name])
 109         return self.GetAll(interface_name)[property_name]
 110     @dbus.service.method(dbus_interface=dbus.PROPERTIES_IFACE,
 111         in_signature='ssv')
 112     def Set(self, interface_name, property_name, value):
 113         #print "%s.Set(%s, %s, %s)" % \
 114         #       (ogSMP, interface_name, property_name, value)
 115         pass
 116
 117     @dbus.service.method(dbus_interface=ogSMP, in_signature='u')
 118     def SetStatus(self, status):
 119         self.status = status
 120
 121     @dbus.service.method(dbus_interface=ogSMP, in_signature='u')
 122     def SetStatusText(self, status_text):
 123         self.status_text = status_text
 124
 125     @dbus.service.signal(dbus_interface=ogSMP, signature='u')
 126     def StatusChanged(self, status):
 127         self.SetStatus(status)
 128
 129     @dbus.service.signal(dbus_interface=ogSMP, signature='s')
 130     def StatusTextChanged(self, status_text):
 131         self.SetStatusText(status_text)
 132
 133
 134 class XScreenSaverIdleChecker():
 135     class XScreenSaverInfo(ctypes.Structure):
 136         """ typedef struct { ... } XScreenSaverInfo; """
 137         _fields_ = [('window',    ctypes.c_ulong), # screen saver window
 138             ('state',      ctypes.c_int),   # off,on,disabled
 139             ('kind',            ctypes.c_int),   # blanked,internal,external
 140             ('since',      ctypes.c_ulong), # milliseconds
 141             ('idle',            ctypes.c_ulong), # milliseconds
 142             ('event_mask',  ctypes.c_ulong)] # events
 143
 144     def __init__(self, idle_timeout):
 145         self.idle_timeout = idle_timeout
 146         self.idle       = False
 147         self.xlib       = ctypes.cdll.LoadLibrary('libX11.so.6')
 148         self.dpy        = self.xlib.XOpenDisplay(os.environ['DISPLAY'])
 149         self.root       = self.xlib.XDefaultRootWindow(self.dpy)
 150         self.xss        = ctypes.cdll.LoadLibrary('libXss.so.1')
 151         self.xss.XScreenSaverAllocInfo.restype \
 152                 = ctypes.POINTER(self.XScreenSaverInfo)
 153         print ("XScreenSaverIdleChecker ready with timeout %d" % idle_timeout)
 154
 155     def check_idle(self, smp):
 156         print "Checking idleness..."
 157         xss_info = self.xss.XScreenSaverAllocInfo()
 158         self.xss.XScreenSaverQueryInfo(self.dpy, self.root, xss_info)
 159         idle = xss_info.contents.idle/1000
 160
 161         if idle >= self.idle_timeout:
 162             if not self.idle:
 163                 print "Becoming idle"
 164                 self.idle = True
 165                 smp.StatusChanged(smp.PRESENCE_IDLE)
 166         else:
 167             if self.idle:
 168                 print "Not idle anymore"
 169                 self.idle = False
 170                 smp.StatusChanged(smp.PRESENCE_AVAILABLE)
 171
 172         gobject.timeout_add(10000, self.check_idle, smp)
 173
 174
 175 gclient = gconf.client_get_default()
 176 gvalue = gclient.get('/apps/gnome-screensaver/idle_delay')
 177 if gvalue is not None:
 178     idle_delay = gvalue.get_int() * 60
 179 else:
 180     # 5 minutes
 181     idle_delay = 300
 182
 183 sessmgr = SessionManager()
 184
 185 xssic = XScreenSaverIdleChecker(idle_delay)
 186 xssic.check_idle(sessmgr.get_smp())
 187
 188 gtk.main()