56b95264cf
This means Buddy and its subclasses no longer need to care about NameOwnerChanged at all. The old code might not have worked anyway, since it was watching for NameOwnerChanged on the session bus, but invoking NM methods on the system bus.
643 lines
23 KiB
Python
643 lines
23 KiB
Python
"""An "actor" on the network, whether remote or local"""
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# Copyright (C) 2007, Red Hat, Inc.
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# Copyright (C) 2007, Collabora Ltd.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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import os
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import gobject
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import dbus
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import dbus.service
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from dbus.gobject_service import ExportedGObject
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import psutils
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from sugar import env, profile
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import logging
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_BUDDY_PATH = "/org/laptop/Sugar/Presence/Buddies/"
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_BUDDY_INTERFACE = "org.laptop.Sugar.Presence.Buddy"
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_OWNER_INTERFACE = "org.laptop.Sugar.Presence.Buddy.Owner"
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_PROP_NICK = "nick"
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_PROP_KEY = "key"
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_PROP_ICON = "icon"
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_PROP_CURACT = "current-activity"
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_PROP_COLOR = "color"
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_PROP_OWNER = "owner"
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_PROP_VALID = "valid"
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# Will go away soon
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_PROP_IP4_ADDRESS = "ip4-address"
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_logger = logging.getLogger('s-p-s.buddy')
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class Buddy(ExportedGObject):
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"""Person on the network (tracks properties and shared activites)
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The Buddy is a collection of metadata describing a particular
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actor/person on the network. The Buddy object tracks a set of
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activities which the actor has shared with the presence service.
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Buddies have a "valid" property which is used to flag Buddies
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which are no longer reachable. That is, a Buddy may represent
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a no-longer reachable target on the network.
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The Buddy emits GObject events that the PresenceService uses
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to track changes in its status.
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Attributes:
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_activities -- dictionary mapping activity ID to
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activity.Activity objects
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handles -- dictionary mapping telepresence client to
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"handle" (XXX what's that)
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"""
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__gsignals__ = {
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'validity-changed':
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# The buddy's validity changed.
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# Validity starts off False, and becomes True when the buddy
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# has a color, a nick and a key.
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# * the new validity: bool
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(gobject.SIGNAL_RUN_FIRST, None, [bool]),
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'property-changed':
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# One of the buddy's properties has changed.
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# * those properties that have changed:
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# dict { str => object }
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(gobject.SIGNAL_RUN_FIRST, None, [object]),
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'icon-changed':
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# The buddy's icon changed.
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# * the bytes of the icon: str
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(gobject.SIGNAL_RUN_FIRST, None, [object]),
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'disappeared':
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# The buddy is offline (has no Telepathy handles and is not the
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# Owner)
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(gobject.SIGNAL_RUN_FIRST, None, []),
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}
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__gproperties__ = {
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_PROP_KEY : (str, None, None, None,
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gobject.PARAM_READWRITE |
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gobject.PARAM_CONSTRUCT_ONLY),
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_PROP_ICON : (object, None, None, gobject.PARAM_READWRITE),
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_PROP_NICK : (str, None, None, None, gobject.PARAM_READWRITE),
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_PROP_COLOR : (str, None, None, None, gobject.PARAM_READWRITE),
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_PROP_CURACT : (str, None, None, None, gobject.PARAM_READWRITE),
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_PROP_VALID : (bool, None, None, False, gobject.PARAM_READABLE),
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_PROP_OWNER : (bool, None, None, False, gobject.PARAM_READABLE),
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_PROP_IP4_ADDRESS : (str, None, None, None, gobject.PARAM_READWRITE)
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}
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def __init__(self, bus_name, object_id, **kwargs):
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"""Initialize the Buddy object
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bus_name -- DBUS object bus name (identifier)
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object_id -- the activity's unique identifier
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kwargs -- used to initialize the object's properties
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constructs a DBUS "object path" from the _BUDDY_PATH
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and object_id
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"""
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if not bus_name:
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raise ValueError("DBus bus name must be valid")
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if not object_id or not isinstance(object_id, int):
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raise ValueError("object id must be a valid number")
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self._bus_name = bus_name
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self._object_id = object_id
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self._object_path = _BUDDY_PATH + str(self._object_id)
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self._activities = {} # Activity ID -> Activity
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self._activity_sigids = {}
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self.handles = {} # tp client -> handle
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self._valid = False
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self._owner = False
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self._key = None
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self._icon = ''
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self._current_activity = None
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self._nick = None
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self._color = None
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self._ip4_address = None
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if not kwargs.get(_PROP_KEY):
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raise ValueError("key required")
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_ALLOWED_INIT_PROPS = [_PROP_NICK, _PROP_KEY, _PROP_ICON,
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_PROP_CURACT, _PROP_COLOR, _PROP_IP4_ADDRESS]
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for (key, value) in kwargs.items():
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if key not in _ALLOWED_INIT_PROPS:
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_logger.debug("Invalid init property '%s'; ignoring..." % key)
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del kwargs[key]
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# Set icon after superclass init, because it sends DBus and GObject
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# signals when set
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icon_data = None
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if kwargs.has_key(_PROP_ICON):
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icon_data = kwargs[_PROP_ICON]
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del kwargs[_PROP_ICON]
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ExportedGObject.__init__(self, bus_name, self._object_path,
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gobject_properties=kwargs)
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if icon_data:
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self.props.icon = icon_data
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def do_get_property(self, pspec):
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"""Retrieve current value for the given property specifier
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pspec -- property specifier with a "name" attribute
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"""
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if pspec.name == _PROP_KEY:
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return self._key
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elif pspec.name == _PROP_ICON:
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return self._icon
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elif pspec.name == _PROP_NICK:
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return self._nick
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elif pspec.name == _PROP_COLOR:
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return self._color
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elif pspec.name == _PROP_CURACT:
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if not self._current_activity:
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return None
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if not self._activities.has_key(self._current_activity):
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return None
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return self._current_activity
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elif pspec.name == _PROP_VALID:
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return self._valid
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elif pspec.name == _PROP_OWNER:
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return self._owner
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elif pspec.name == _PROP_IP4_ADDRESS:
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return self._ip4_address
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def do_set_property(self, pspec, value):
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"""Set given property
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pspec -- property specifier with a "name" attribute
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value -- value to set
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emits 'icon-changed' signal on icon setting
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calls _update_validity on all calls
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"""
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if pspec.name == _PROP_ICON:
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if str(value) != self._icon:
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self._icon = str(value)
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self.IconChanged(self._icon)
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self.emit('icon-changed', self._icon)
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elif pspec.name == _PROP_NICK:
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self._nick = value
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elif pspec.name == _PROP_COLOR:
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self._color = value
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elif pspec.name == _PROP_CURACT:
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self._current_activity = value
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elif pspec.name == _PROP_KEY:
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if self._key:
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raise RuntimeError("Key already set.")
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self._key = value
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elif pspec.name == _PROP_IP4_ADDRESS:
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self._ip4_address = value
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self._update_validity()
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# dbus signals
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@dbus.service.signal(_BUDDY_INTERFACE,
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signature="ay")
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def IconChanged(self, icon_data):
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"""Generates DBUS signal with icon_data"""
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@dbus.service.signal(_BUDDY_INTERFACE,
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signature="o")
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def JoinedActivity(self, activity_path):
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"""Generates DBUS signal when buddy joins activity
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activity_path -- DBUS path to the activity object
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"""
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@dbus.service.signal(_BUDDY_INTERFACE,
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signature="o")
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def LeftActivity(self, activity_path):
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"""Generates DBUS signal when buddy leaves activity
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activity_path -- DBUS path to the activity object
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"""
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@dbus.service.signal(_BUDDY_INTERFACE,
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signature="a{sv}")
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def PropertyChanged(self, updated):
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"""Generates DBUS signal when buddy's property changes
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updated -- updated property-set (dictionary) with the
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Buddy's property (changed) values. Note: not the
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full set of properties, just the changes.
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"""
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def add_telepathy_handle(self, tp_client, handle):
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"""Add a Telepathy handle."""
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conn = tp_client.get_connection()
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self.TelepathyHandleAdded(conn.service_name, conn.object_path, handle)
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self.handles[tp_client] = handle
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@dbus.service.signal(_BUDDY_INTERFACE, signature='sou')
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def TelepathyHandleAdded(self, tp_conn_name, tp_conn_path, handle):
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"""Another Telepathy handle has become associated with the buddy.
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This must only be emitted for non-channel-specific handles.
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tp_conn_name -- The bus name at which the Telepathy connection may be
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found
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tp_conn_path -- The object path at which the Telepathy connection may
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be found
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handle -- The handle of type CONTACT, which is not channel-specific,
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newly associated with the buddy
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"""
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def remove_telepathy_handle(self, tp_client, handle):
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"""Remove a Telepathy handle."""
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conn = tp_client.get_connection()
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my_handle = self.handles.get(tp_client, 0)
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if my_handle == handle:
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del self.handles[tp_client]
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self.TelepathyHandleRemoved(conn.service_name, conn.object_path,
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handle)
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# the Owner can't disappear - that would be silly
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if not self.handles and not self._owner:
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self.emit('disappeared')
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else:
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_logger.debug('Telepathy handle %u supposedly removed, but '
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'my handle on that connection is %u - ignoring',
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handle, my_handle)
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@dbus.service.signal(_BUDDY_INTERFACE, signature='sou')
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def TelepathyHandleRemoved(self, tp_conn_name, tp_conn_path, handle):
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"""A Telepathy handle has ceased to be associated with the buddy,
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probably because that contact went offline.
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The parameters are the same as for TelepathyHandleAdded.
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"""
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# dbus methods
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@dbus.service.method(_BUDDY_INTERFACE,
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in_signature="", out_signature="ay")
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def GetIcon(self):
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"""Retrieve Buddy's icon data
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returns empty string or dbus.ByteArray
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"""
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if not self.props.icon:
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return ""
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return dbus.ByteArray(self.props.icon)
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@dbus.service.method(_BUDDY_INTERFACE,
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in_signature="", out_signature="ao")
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def GetJoinedActivities(self):
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"""Retrieve set of Buddy's joined activities (paths)
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returns list of dbus service paths for the Buddy's joined
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activities
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"""
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acts = []
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for act in self.get_joined_activities():
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if act.props.valid:
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acts.append(act.object_path())
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return acts
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@dbus.service.method(_BUDDY_INTERFACE,
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in_signature="", out_signature="a{sv}")
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def GetProperties(self):
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"""Retrieve set of Buddy's properties
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returns dictionary of
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nick : str(nickname)
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owner : bool( whether this Buddy is an owner??? )
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XXX what is the owner flag for?
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key : str(public-key)
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color: Buddy's icon colour
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XXX what type?
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current-activity: Buddy's current activity_id, or
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"" if no current activity
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"""
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props = {}
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props[_PROP_NICK] = self.props.nick
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props[_PROP_OWNER] = self.props.owner
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props[_PROP_KEY] = self.props.key
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props[_PROP_COLOR] = self.props.color
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if self.props.ip4_address:
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props[_PROP_IP4_ADDRESS] = self.props.ip4_address
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else:
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props[_PROP_IP4_ADDRESS] = ""
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if self.props.current_activity:
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props[_PROP_CURACT] = self.props.current_activity
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else:
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props[_PROP_CURACT] = ""
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return props
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@dbus.service.method(_BUDDY_INTERFACE,
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in_signature='', out_signature='a(sou)')
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def GetTelepathyHandles(self):
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"""Return a list of non-channel-specific Telepathy contact handles
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associated with this Buddy.
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:Returns:
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An array of triples (connection well-known bus name, connection
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object path, handle).
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"""
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ret = []
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for plugin in self.handles:
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conn = plugin.get_connection()
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ret.append((str(conn.service_name), conn.object_path,
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self.handles[plugin]))
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# methods
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def object_path(self):
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"""Retrieve our dbus.ObjectPath object"""
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return dbus.ObjectPath(self._object_path)
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def _activity_validity_changed_cb(self, activity, valid):
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"""Join or leave the activity when its validity changes"""
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if valid:
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self.JoinedActivity(activity.object_path())
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else:
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self.LeftActivity(activity.object_path())
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def add_activity(self, activity):
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"""Add an activity to the Buddy's set of activities
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activity -- activity.Activity instance
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calls JoinedActivity
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"""
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actid = activity.props.id
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if self._activities.has_key(actid):
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return
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self._activities[actid] = activity
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# join/leave activity when it's validity changes
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sigid = activity.connect("validity-changed",
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self._activity_validity_changed_cb)
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self._activity_sigids[actid] = sigid
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if activity.props.valid:
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self.JoinedActivity(activity.object_path())
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def remove_activity(self, activity):
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"""Remove the activity from the Buddy's set of activities
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activity -- activity.Activity instance
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calls LeftActivity
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"""
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actid = activity.props.id
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if not self._activities.has_key(actid):
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return
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activity.disconnect(self._activity_sigids[actid])
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del self._activity_sigids[actid]
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del self._activities[actid]
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if activity.props.valid:
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self.LeftActivity(activity.object_path())
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def get_joined_activities(self):
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"""Retrieves list of still-valid activity objects"""
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acts = []
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for act in self._activities.values():
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acts.append(act)
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return acts
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def set_properties(self, properties):
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"""Set the given set of properties on the object
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properties -- set of property values to set
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if no change, no events generated
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if change, generates property-changed and
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calls _update_validity
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"""
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changed = False
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changed_props = {}
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if _PROP_NICK in properties.keys():
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nick = properties[_PROP_NICK]
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if nick != self._nick:
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self._nick = nick
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changed_props[_PROP_NICK] = nick
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changed = True
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if _PROP_COLOR in properties.keys():
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color = properties[_PROP_COLOR]
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if color != self._color:
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self._color = color
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changed_props[_PROP_COLOR] = color
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changed = True
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if _PROP_CURACT in properties.keys():
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curact = properties[_PROP_CURACT]
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if curact != self._current_activity:
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self._current_activity = curact
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changed_props[_PROP_CURACT] = curact
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changed = True
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if _PROP_IP4_ADDRESS in properties.keys():
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ip4addr = properties[_PROP_IP4_ADDRESS]
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if ip4addr != self._ip4_address:
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self._ip4_address = ip4addr
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changed_props[_PROP_IP4_ADDRESS] = ip4addr
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changed = True
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if not changed or not len(changed_props.keys()):
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return
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# Try emitting PropertyChanged before updating validity
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# to avoid leaking a PropertyChanged signal before the buddy is
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# actually valid the first time after creation
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if self._valid:
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dbus_changed = {}
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for key, value in changed_props.items():
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if value:
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dbus_changed[key] = value
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else:
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dbus_changed[key] = ""
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self.PropertyChanged(dbus_changed)
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self.emit('property-changed', changed_props)
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self._update_validity()
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def _update_validity(self):
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"""Check whether we are now valid
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validity is True if color, nick and key are non-null
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emits validity-changed if we have changed validity
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"""
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try:
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old_valid = self._valid
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if self._color and self._nick and self._key:
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self._valid = True
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else:
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self._valid = False
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if old_valid != self._valid:
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self.emit("validity-changed", self._valid)
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except AttributeError:
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self._valid = False
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class GenericOwner(Buddy):
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"""Common functionality for Local User-like objects
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The TestOwner wants to produce something *like* a
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ShellOwner, but with randomised changes and the like.
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This class provides the common features for a real
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local owner and a testing one.
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"""
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__gtype_name__ = "GenericOwner"
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def __init__(self, ps, bus_name, object_id, **kwargs):
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"""Initialize the GenericOwner instance
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ps -- presenceservice.PresenceService object
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bus_name -- DBUS object bus name (identifier)
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object_id -- the activity's unique identifier
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kwargs -- used to initialize the object's properties
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calls Buddy.__init__
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"""
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self._ps = ps
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self._server = 'olpc.collabora.co.uk'
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self._key_hash = None
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self._registered = False
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if kwargs.has_key("server"):
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self._server = kwargs["server"]
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del kwargs["server"]
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if kwargs.has_key("key_hash"):
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self._key_hash = kwargs["key_hash"]
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del kwargs["key_hash"]
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if kwargs.has_key("registered"):
|
|
self._registered = kwargs["registered"]
|
|
del kwargs["registered"]
|
|
|
|
self._ip4_addr_monitor = psutils.IP4AddressMonitor.get_instance()
|
|
self._ip4_addr_monitor.connect("address-changed",
|
|
self._ip4_address_changed_cb)
|
|
if self._ip4_addr_monitor.props.address:
|
|
kwargs["ip4-address"] = self._ip4_addr_monitor.props.address
|
|
|
|
Buddy.__init__(self, bus_name, object_id, **kwargs)
|
|
self._owner = True
|
|
|
|
self._bus = dbus.SessionBus()
|
|
|
|
def _ip4_address_changed_cb(self, monitor, address):
|
|
"""Handle IPv4 address change, set property to generate event"""
|
|
props = {_PROP_IP4_ADDRESS: address}
|
|
self.set_properties(props)
|
|
|
|
def get_registered(self):
|
|
"""Retrieve whether owner has registered with presence server"""
|
|
return self._registered
|
|
|
|
def get_server(self):
|
|
"""Retrieve presence server (XXX url??)"""
|
|
return self._server
|
|
|
|
def get_key_hash(self):
|
|
"""Retrieve the user's private-key hash"""
|
|
return self._key_hash
|
|
|
|
def set_registered(self, registered):
|
|
"""Customisation point: handle the registration of the owner"""
|
|
raise RuntimeError("Subclasses must implement")
|
|
|
|
|
|
class ShellOwner(GenericOwner):
|
|
"""Representation of the local-machine owner using Sugar's Shell
|
|
|
|
The ShellOwner uses the Sugar Shell's dbus services to
|
|
register for updates about the user's profile description.
|
|
"""
|
|
__gtype_name__ = "ShellOwner"
|
|
|
|
_SHELL_SERVICE = "org.laptop.Shell"
|
|
_SHELL_OWNER_INTERFACE = "org.laptop.Shell.Owner"
|
|
_SHELL_PATH = "/org/laptop/Shell"
|
|
|
|
def __init__(self, ps, bus_name, object_id, test=False):
|
|
"""Initialize the ShellOwner instance
|
|
|
|
ps -- presenceservice.PresenceService object
|
|
bus_name -- DBUS object bus name (identifier)
|
|
object_id -- the activity's unique identifier
|
|
test -- ignored
|
|
|
|
Retrieves initial property values from the profile
|
|
module. Loads the buddy icon from file as well.
|
|
XXX note: no error handling on that
|
|
|
|
calls GenericOwner.__init__
|
|
"""
|
|
server = profile.get_server()
|
|
key_hash = profile.get_private_key_hash()
|
|
registered = profile.get_server_registered()
|
|
key = profile.get_pubkey()
|
|
nick = profile.get_nick_name()
|
|
color = profile.get_color().to_string()
|
|
|
|
icon_file = os.path.join(env.get_profile_path(), "buddy-icon.jpg")
|
|
f = open(icon_file, "r")
|
|
icon = f.read()
|
|
f.close()
|
|
|
|
GenericOwner.__init__(self, ps, bus_name, object_id, key=key,
|
|
nick=nick, color=color, icon=icon, server=server,
|
|
key_hash=key_hash, registered=registered)
|
|
|
|
# Ask to get notifications on Owner object property changes in the
|
|
# shell. If it's not currently running, no problem - we'll get the
|
|
# signals when it does run
|
|
for (signal, cb) in (('IconChanged', self._icon_changed_cb),
|
|
('ColorChanged', self._color_changed_cb),
|
|
('NickChanged', self._nick_changed_cb)):
|
|
self._bus.add_signal_receiver(cb, signal_name=signal,
|
|
dbus_interface=self._SHELL_OWNER_INTERFACE,
|
|
bus_name=self._SHELL_SERVICE,
|
|
path=self._SHELL_PATH)
|
|
|
|
def set_registered(self, value):
|
|
"""Handle notification that we have been registered"""
|
|
if value:
|
|
profile.set_server_registered()
|
|
|
|
def _icon_changed_cb(self, icon):
|
|
"""Handle icon change, set property to generate event"""
|
|
self.props.icon = icon
|
|
|
|
def _color_changed_cb(self, color):
|
|
"""Handle color change, set property to generate event"""
|
|
props = {_PROP_COLOR: color}
|
|
self.set_properties(props)
|
|
|
|
def _nick_changed_cb(self, nick):
|
|
"""Handle nickname change, set property to generate event"""
|
|
props = {_PROP_NICK: nick}
|
|
self.set_properties(props)
|
|
|
|
def _cur_activity_changed_cb(self, activity_id):
|
|
"""Handle current-activity change, set property to generate event
|
|
|
|
Filters out local activities (those not in self.activites)
|
|
because the network users can't join those activities, so
|
|
the activity_id shared will be None in those cases...
|
|
"""
|
|
if not self._activities.has_key(activity_id):
|
|
# This activity is local-only
|
|
activity_id = None
|
|
props = {_PROP_CURACT: activity_id}
|
|
self.set_properties(props)
|