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237 lines
9.1 KiB
Python
237 lines
9.1 KiB
Python
"""UI interface to a buddy in the presence service"""
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# Copyright (C) 2007, Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library 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 GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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import gobject
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import gtk
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import dbus
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class Buddy(gobject.GObject):
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"""UI interface for a Buddy in the presence service
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Each buddy interface tracks a set of activities and properties
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that can be queried to provide UI controls for manipulating
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the presence interface.
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Properties Dictionary:
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'key': public key,
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'nick': nickname ,
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'color': color (XXX what format),
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'current-activity': (XXX dbus path?),
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'owner': (XXX dbus path?),
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'icon': (XXX pixel data for an icon?)
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See __gproperties__
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"""
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__gsignals__ = {
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'icon-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([])),
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'joined-activity': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'left-activity': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'property-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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}
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__gproperties__ = {
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'key' : (str, None, None, None, gobject.PARAM_READABLE),
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'icon' : (str, None, None, None, gobject.PARAM_READABLE),
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'nick' : (str, None, None, None, gobject.PARAM_READABLE),
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'color' : (str, None, None, None, gobject.PARAM_READABLE),
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'current-activity' : (object, None, None, gobject.PARAM_READABLE),
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'owner' : (bool, None, None, False, gobject.PARAM_READABLE),
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'ip4-address' : (str, None, None, None, gobject.PARAM_READABLE)
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}
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_PRESENCE_SERVICE = "org.laptop.Sugar.Presence"
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_BUDDY_DBUS_INTERFACE = "org.laptop.Sugar.Presence.Buddy"
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def __init__(self, bus, new_obj_cb, del_obj_cb, object_path):
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"""Initialise the reference to the buddy
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bus -- dbus bus object
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new_obj_cb -- callback to call when this buddy joins an activity
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del_obj_cb -- callback to call when this buddy leaves an activity
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object_path -- path to the buddy object
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"""
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gobject.GObject.__init__(self)
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self._object_path = object_path
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self._ps_new_object = new_obj_cb
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self._ps_del_object = del_obj_cb
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self._properties = {}
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self._activities = {}
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bobj = bus.get_object(self._PRESENCE_SERVICE, object_path)
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self._buddy = dbus.Interface(bobj, self._BUDDY_DBUS_INTERFACE)
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self._icon_changed_signal = self._buddy.connect_to_signal(
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'IconChanged', self._icon_changed_cb, byte_arrays=True)
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self._joined_activity_signal = self._buddy.connect_to_signal(
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'JoinedActivity', self._joined_activity_cb)
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self._left_activity_signal = self._buddy.connect_to_signal(
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'LeftActivity', self._left_activity_cb)
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self._property_changed_signal = self._buddy.connect_to_signal(
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'PropertyChanged', self._property_changed_cb)
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self._properties = self._get_properties_helper()
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activities = self._buddy.GetJoinedActivities()
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for op in activities:
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self._activities[op] = self._ps_new_object(op)
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self._icon = None
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def destroy(self):
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self._icon_changed_signal.remove()
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self._joined_activity_signal.remove()
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self._left_activity_signal.remove()
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self._property_changed_signal.remove()
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def _get_properties_helper(self):
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"""Retrieve the Buddy's property dictionary from the service object
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"""
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props = self._buddy.GetProperties(byte_arrays=True)
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if not props:
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return {}
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return props
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def do_get_property(self, pspec):
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"""Retrieve a particular property from our property dictionary
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pspec -- XXX some sort of GTK specifier object with attributes
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including 'name', 'active' and 'icon-name'
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"""
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if pspec.name == "key":
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return self._properties["key"]
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elif pspec.name == "nick":
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return self._properties["nick"]
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elif pspec.name == "color":
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return self._properties["color"]
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elif pspec.name == "current-activity":
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if not self._properties.has_key("current-activity"):
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return None
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curact = self._properties["current-activity"]
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if not len(curact):
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return None
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for activity in self._activities.values():
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if activity.props.id == curact:
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return activity
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return None
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elif pspec.name == "owner":
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return self._properties["owner"]
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elif pspec.name == "icon":
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if not self._icon:
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self._icon = str(self._buddy.GetIcon(byte_arrays=True))
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return self._icon
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elif pspec.name == "ip4-address":
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# IPv4 address will go away quite soon
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if not self._properties.has_key("ip4-address"):
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return None
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return self._properties["ip4-address"]
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def object_path(self):
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"""Retrieve our dbus object path"""
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return self._object_path
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def _emit_icon_changed_signal(self, bytes):
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"""Emit GObject signal when icon has changed"""
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self._icon = str(bytes)
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self.emit('icon-changed')
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return False
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def _icon_changed_cb(self, icon_data):
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"""Handle dbus signal by emitting a GObject signal"""
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gobject.idle_add(self._emit_icon_changed_signal, icon_data)
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def _emit_joined_activity_signal(self, object_path):
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"""Emit activity joined signal with Activity object"""
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self.emit('joined-activity', self._ps_new_object(object_path))
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return False
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def _joined_activity_cb(self, object_path):
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"""Handle dbus signal by emitting a GObject signal
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Stores the activity in activities dictionary as well
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"""
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if not self._activities.has_key(object_path):
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self._activities[object_path] = self._ps_new_object(object_path)
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gobject.idle_add(self._emit_joined_activity_signal, object_path)
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def _emit_left_activity_signal(self, object_path):
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"""Emit activity left signal with Activity object
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XXX this calls self._ps_new_object instead of self._ps_del_object,
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which would seem to be the incorrect callback?
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"""
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self.emit('left-activity', self._ps_new_object(object_path))
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return False
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def _left_activity_cb(self, object_path):
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"""Handle dbus signal by emitting a GObject signal
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Also removes from the activities dictionary
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"""
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if self._activities.has_key(object_path):
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del self._activities[object_path]
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gobject.idle_add(self._emit_left_activity_signal, object_path)
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def _handle_property_changed_signal(self, prop_list):
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"""Emit property-changed signal with property dictionary
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Generates a property-changed signal with the results of
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_get_properties_helper()
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"""
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self._properties = self._get_properties_helper()
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# FIXME: don't leak unexposed property names
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self.emit('property-changed', prop_list)
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return False
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def _property_changed_cb(self, prop_list):
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"""Handle dbus signal by emitting a GObject signal"""
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gobject.idle_add(self._handle_property_changed_signal, prop_list)
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def get_icon_pixbuf(self):
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"""Retrieve Buddy's icon as a GTK pixel buffer
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XXX Why aren't the icons coming in as SVG?
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"""
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if self.props.icon and len(self.props.icon):
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pbl = gtk.gdk.PixbufLoader()
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pbl.write(self.props.icon)
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pbl.close()
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return pbl.get_pixbuf()
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else:
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return None
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def get_joined_activities(self):
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"""Retrieve the set of all activities which this buddy has joined
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Uses the GetJoinedActivities method on the service
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object to produce object paths, wraps each in an
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Activity object.
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returns list of presence Activity objects
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"""
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try:
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resp = self._buddy.GetJoinedActivities()
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except dbus.exceptions.DBusException:
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return []
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acts = []
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for item in resp:
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acts.append(self._ps_new_object(item))
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return acts
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