sugar-toolkit-gtk3/lib/sugar/presence/activity.py

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"""UI interface to an activity in the presence service"""
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# Copyright (C) 2007, Red Hat, Inc.
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#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
import logging
import gobject
import dbus
_logger = logging.getLogger('sugar.presence.activity')
class Activity(gobject.GObject):
"""UI interface for an Activity in the presence service
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Activities in the presence service represent your and other user's
shared activities.
Properties:
id
color
name
type
joined
"""
__gsignals__ = {
'buddy-joined': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'buddy-left': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'new-channel': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'joined': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
}
__gproperties__ = {
'id' : (str, None, None, None, gobject.PARAM_READABLE),
'name' : (str, None, None, None, gobject.PARAM_READWRITE),
'tags' : (str, None, None, None, gobject.PARAM_READWRITE),
'color' : (str, None, None, None, gobject.PARAM_READWRITE),
'type' : (str, None, None, None, gobject.PARAM_READABLE),
'private' : (bool, None, None, True, gobject.PARAM_READWRITE),
'joined' : (bool, None, None, False, gobject.PARAM_READABLE),
}
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_PRESENCE_SERVICE = "org.laptop.Sugar.Presence"
_ACTIVITY_DBUS_INTERFACE = "org.laptop.Sugar.Presence.Activity"
def __init__(self, bus, new_obj_cb, del_obj_cb, object_path):
"""Initialse the activity interface, connecting to service"""
gobject.GObject.__init__(self)
self._object_path = object_path
self._ps_new_object = new_obj_cb
self._ps_del_object = del_obj_cb
bobj = bus.get_object(self._PRESENCE_SERVICE, object_path)
self._activity = dbus.Interface(bobj, self._ACTIVITY_DBUS_INTERFACE)
self._activity.connect_to_signal('BuddyHandleJoined',
self._buddy_handle_joined_cb)
self._activity.connect_to_signal('BuddyLeft',
self._buddy_left_cb)
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self._activity.connect_to_signal('NewChannel', self._new_channel_cb)
self._activity.connect_to_signal('PropertiesChanged',
self._properties_changed_cb,
utf8_strings=True)
# FIXME: this *would* just use a normal proxy call, but I want the
# pending call object so I can block on it, and normal proxy methods
# don't return those as of dbus-python 0.82.1; so do it the hard way
self._get_properties_call = bus.call_async(self._PRESENCE_SERVICE,
object_path, self._ACTIVITY_DBUS_INTERFACE, 'GetProperties',
'', (), self._get_properties_reply_cb,
self._get_properties_error_cb, utf8_strings=True)
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self._id = None
self._color = None
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self._name = None
self._type = None
self._tags = None
self._private = True
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self._joined = False
# Cache for get_buddy_by_handle, maps handles to buddy object paths
self._handle_to_buddy_path = {}
self._buddy_path_to_handle = {}
def __repr__(self):
return ('<proxy for %s at %x>' % (self._object_path, id(self)))
def _get_properties_reply_cb(self, new_props):
self._get_properties_call = None
_logger.debug('%r: initial GetProperties returned', self)
self._properties_changed_cb(new_props)
def _get_properties_error_cb(self, e):
self._get_properties_call = None
# FIXME: do something with the error
_logger.warning('%r: Error doing initial GetProperties: %s', self, e)
def _properties_changed_cb(self, new_props):
_logger.debug('%r: Activity properties changed to %r', self, new_props)
val = new_props.get('name', self._name)
if isinstance(val, str) and val != self._name:
self._name = val
self.notify('name')
val = new_props.get('tags', self._tags)
if isinstance(val, str) and val != self._tags:
self._tags = val
self.notify('tags')
val = new_props.get('color', self._color)
if isinstance(val, str) and val != self._color:
self._color = val
self.notify('color')
val = bool(new_props.get('private', self._private))
if val != self._private:
self._private = val
self.notify('private')
val = new_props.get('id', self._id)
if isinstance(val, str) and self._id is None:
self._id = val
self.notify('id')
val = new_props.get('type', self._type)
if isinstance(val, str) and self._type is None:
self._type = val
self.notify('type')
def object_path(self):
"""Get our dbus object path"""
return self._object_path
def do_get_property(self, pspec):
"""Retrieve a particular property from our property dictionary"""
if pspec.name == "joined":
return self._joined
if self._get_properties_call is not None:
_logger.debug('%r: Blocking on GetProperties() because someone '
'wants property %s', self, pspec.name)
self._get_properties_call.block()
if pspec.name == "id":
return self._id
elif pspec.name == "name":
return self._name
elif pspec.name == "color":
return self._color
elif pspec.name == "type":
return self._type
elif pspec.name == "tags":
return self._tags
elif pspec.name == "private":
return self._private
# FIXME: need an asynchronous API to set these properties, particularly
# 'private'
def do_set_property(self, pspec, val):
"""Set a particular property in our property dictionary"""
if pspec.name == "name":
self._activity.SetProperties({'name': val})
self._name = val
elif pspec.name == "color":
self._activity.SetProperties({'color': val})
self._color = val
elif pspec.name == "tags":
self._activity.SetProperties({'tags': val})
self._tags = val
elif pspec.name == "private":
self._activity.SetProperties({'private': val})
self._private = val
def _emit_buddy_joined_signal(self, object_path):
"""Generate buddy-joined GObject signal with presence Buddy object"""
self.emit('buddy-joined', self._ps_new_object(object_path))
return False
def _buddy_handle_joined_cb(self, object_path, handle):
_logger.debug('%r: buddy %s joined with handle %u', self, object_path,
handle)
gobject.idle_add(self._emit_buddy_joined_signal, object_path)
self._handle_to_buddy_path[handle] = object_path
self._buddy_path_to_handle[object_path] = handle
def _emit_buddy_left_signal(self, object_path):
"""Generate buddy-left GObject signal with presence Buddy object
XXX note use of _ps_new_object instead of _ps_del_object here
"""
self.emit('buddy-left', self._ps_new_object(object_path))
return False
def _buddy_left_cb(self, object_path):
_logger.debug('%r: buddy %s left', self, object_path)
gobject.idle_add(self._emit_buddy_left_signal, object_path)
handle = self._buddy_path_to_handle.pop(object_path, None)
if handle:
self._handle_to_buddy_path.pop(handle, None)
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def _emit_new_channel_signal(self, object_path):
"""Generate new-channel GObject signal with channel object path
New telepathy-python communications channel has been opened
"""
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self.emit('new-channel', object_path)
return False
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def _new_channel_cb(self, object_path):
_logger.debug('%r: new channel created at %s', self, object_path)
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gobject.idle_add(self._emit_new_channel_signal, object_path)
def get_joined_buddies(self):
"""Retrieve the set of Buddy objects attached to this activity
returns list of presence Buddy objects
"""
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resp = self._activity.GetJoinedBuddies()
buddies = []
for item in resp:
buddies.append(self._ps_new_object(item))
return buddies
def get_buddy_by_handle(self, handle):
"""Retrieve the Buddy object given a telepathy handle.
buddy object paths are cached in self._handle_to_buddy_path,
so we can get the buddy without calling PS.
"""
object_path = self._handle_to_buddy_path.get(handle, None)
if object_path:
buddy = self._ps_new_object(object_path)
return buddy
return None
def invite(self, buddy, message, response_cb):
"""Invite the given buddy to join this activity.
The callback will be called with one parameter: None on success,
or an exception on failure.
"""
op = buddy.object_path()
_logger.debug('%r: inviting %s', self, op)
self._activity.Invite(op, message,
reply_handler=lambda: response_cb(None),
error_handler=response_cb)
def _join_cb(self):
self._joined = True
self.emit("joined", True, None)
def _join_error_cb(self, err):
self.emit("joined", False, str(err))
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def join(self):
"""Join this activity
XXX if these are all activities, can I join my own activity?
"""
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if self._joined:
self.emit("joined", True, None)
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return
_logger.debug('%r: joining', self)
self._activity.Join(reply_handler=self._join_cb, error_handler=self._join_error_cb)
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def get_channels(self):
"""Retrieve communications channel descriptions for the activity
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Returns a tuple containing:
- the D-Bus well-known service name of the connection
(FIXME: this is redundant; in Telepathy it can be derived
from that of the connection)
- the D-Bus object path of the connection
- a list of D-Bus object paths representing the channels
associated with this activity
"""
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(bus_name, connection, channels) = self._activity.GetChannels()
_logger.debug('%r: bus name is %s, connection is %s, channels are %r',
self, bus_name, connection, channels)
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return bus_name, connection, channels
def _leave_cb(self):
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"""Callback for async action of leaving shared activity."""
self.emit("joined", False, "left activity")
def _leave_error_cb(self, err):
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"""Callback for error in async leaving of shared activity."""
_logger.debug('Failed to leave activity: %s', err)
def leave(self):
"""Leave this shared activity"""
_logger.debug('%r: leaving', self)
self._joined = False
self._activity.Leave(reply_handler=self._leave_cb,
error_handler=self._leave_error_cb)