537 lines
19 KiB
Python
537 lines
19 KiB
Python
# 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 gobject
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import dbus, dbus.service
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from sugar import util
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import logging
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from telepathy.interfaces import (CHANNEL_INTERFACE)
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_ACTIVITY_PATH = "/org/laptop/Sugar/Presence/Activities/"
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_ACTIVITY_INTERFACE = "org.laptop.Sugar.Presence.Activity"
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class DBusGObjectMetaclass(dbus.service.InterfaceType, gobject.GObjectMeta): pass
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class DBusGObject(dbus.service.Object, gobject.GObject): __metaclass__ = DBusGObjectMetaclass
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_PROP_ID = "id"
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_PROP_NAME = "name"
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_PROP_COLOR = "color"
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_PROP_TYPE = "type"
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_PROP_VALID = "valid"
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_PROP_LOCAL = "local"
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_PROP_JOINED = "joined"
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_PROP_CUSTOM_PROPS = "custom-props"
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class Activity(DBusGObject):
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"""Represents a potentially shareable activity on the network.
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"""
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__gtype_name__ = "Activity"
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__gsignals__ = {
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'validity-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_BOOLEAN]))
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}
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__gproperties__ = {
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_PROP_ID : (str, None, None, None,
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gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT_ONLY),
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_PROP_NAME : (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_TYPE : (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_LOCAL : (bool, None, None, False,
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gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT_ONLY),
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_PROP_JOINED : (bool, None, None, False, gobject.PARAM_READABLE),
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_PROP_CUSTOM_PROPS : (object, None, None,
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gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT_ONLY)
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}
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_RESERVED_PROPNAMES = __gproperties__.keys()
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def __init__(self, bus_name, object_id, tp, **kwargs):
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"""Initializes the activity and sets its properties to default values.
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bus_name -- DBUS name for lookup on local host
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object_id -- The unique worldwide ID for this activity
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tp -- The server plugin object (stands for "telepathy plugin")
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kwargs -- Keyword arguments for the GObject properties
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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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if not tp:
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raise ValueError("telepathy CM must be valid")
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self._object_id = object_id
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self._object_path = _ACTIVITY_PATH + str(self._object_id)
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dbus.service.Object.__init__(self, bus_name, self._object_path)
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self._buddies = []
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self._joined = False
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# the telepathy client
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self._tp = tp
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self._text_channel = None
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self._valid = False
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self._id = None
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self._color = None
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self._local = False
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self._type = None
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self._custom_props = {}
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# ensure no reserved property names are in custom properties
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if kwargs.get(_PROP_CUSTOM_PROPS):
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(rprops, cprops) = self._split_properties(kwargs.get(_PROP_CUSTOM_PROPS))
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if len(rprops.keys()) > 0:
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raise ValueError("Cannot use reserved property names '%s'" % ", ".join(rprops.keys()))
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if not kwargs.get(_PROP_ID):
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raise ValueError("activity id is required")
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if not util.validate_activity_id(kwargs[_PROP_ID]):
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raise ValueError("Invalid activity id '%s'" % kwargs[_PROP_ID])
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gobject.GObject.__init__(self, **kwargs)
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if self.props.local and not self.props.valid:
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raise RuntimeError("local activities require color, type, and name")
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# If not yet valid, query activity properties
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if not self.props.valid:
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tp.update_activity_properties(self._id)
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def do_get_property(self, pspec):
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"""Gets the value of a property associated with this activity.
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pspec -- Property specifier
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returns The value of the given property.
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"""
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if pspec.name == _PROP_ID:
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return self._id
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elif pspec.name == _PROP_NAME:
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return self._name
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elif pspec.name == _PROP_COLOR:
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return self._color
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elif pspec.name == _PROP_TYPE:
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return self._type
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elif pspec.name == _PROP_VALID:
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return self._valid
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elif pspec.name == _PROP_JOINED:
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return self._joined
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elif pspec.name == _PROP_LOCAL:
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return self._local
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def do_set_property(self, pspec, value):
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"""Sets the value of a property associated with this activity.
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pspec -- Property specifier
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value -- Desired value
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Note that the "type" property can be set only once; attempting to set it
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to something different later will raise a RuntimeError.
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"""
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if pspec.name == _PROP_ID:
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if self._id:
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raise RuntimeError("activity ID is already set")
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self._id = value
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elif pspec.name == _PROP_NAME:
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self._name = 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_TYPE:
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if self._type:
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raise RuntimeError("activity type is already set")
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self._type = value
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elif pspec.name == _PROP_JOINED:
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self._joined = value
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elif pspec.name == _PROP_LOCAL:
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self._local = value
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elif pspec.name == _PROP_CUSTOM_PROPS:
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if not value:
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value = {}
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(rprops, cprops) = self._split_properties(value)
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self._custom_props = {}
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for (key, dvalue) in cprops.items():
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self._custom_props[str(key)] = str(dvalue)
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self._update_validity()
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def _update_validity(self):
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"""Sends a "validity-changed" signal if this activity's validity has changed.
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Determines whether this activity's status has changed from valid to
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invalid, or invalid to valid, and emits a "validity-changed" signal
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if either is true. "Valid" means that the object's type, ID, name,
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colour and type properties have all been set to something valid
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(i.e., not "None").
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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._name and self._id and self._type:
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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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# dbus signals
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@dbus.service.signal(_ACTIVITY_INTERFACE,
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signature="o")
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def BuddyJoined(self, buddy_path):
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"""Generates DBUS signal when a buddy joins this activity.
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buddy_path -- DBUS path to buddy object
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"""
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pass
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@dbus.service.signal(_ACTIVITY_INTERFACE,
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signature="o")
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def BuddyLeft(self, buddy_path):
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"""Generates DBUS signal when a buddy leaves this activity.
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buddy_path -- DBUS path to buddy object
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"""
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pass
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@dbus.service.signal(_ACTIVITY_INTERFACE,
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signature="o")
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def NewChannel(self, channel_path):
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"""Generates DBUS signal when a new channel is created for this activity.
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channel_path -- DBUS path to new channel
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XXX - what is this supposed to do? Who is supposed to call it?
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What is the channel path? Right now this is never called.
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"""
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pass
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# dbus methods
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@dbus.service.method(_ACTIVITY_INTERFACE,
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in_signature="", out_signature="s")
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def GetId(self):
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"""DBUS method to get this activity's ID
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returns Activity ID
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"""
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return self.props.id
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@dbus.service.method(_ACTIVITY_INTERFACE,
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in_signature="", out_signature="s")
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def GetColor(self):
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"""DBUS method to get this activity's colour
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returns Activity colour
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"""
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return self.props.color
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@dbus.service.method(_ACTIVITY_INTERFACE,
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in_signature="", out_signature="s")
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def GetType(self):
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"""DBUS method to get this activity's type
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returns Activity type
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"""
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return self.props.type
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@dbus.service.method(_ACTIVITY_INTERFACE, in_signature="", out_signature="",
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async_callbacks=('async_cb', 'async_err_cb'))
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def Join(self, async_cb, async_err_cb):
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"""DBUS method to for the local user to attempt to join the activity
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async_cb -- Callback method to be called if join attempt is successful
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async_err_cb -- Callback method to be called if join attempt is unsuccessful
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"""
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self.join(async_cb, async_err_cb)
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@dbus.service.method(_ACTIVITY_INTERFACE,
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in_signature="", out_signature="ao")
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def GetJoinedBuddies(self):
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"""DBUS method to return a list of valid buddies who are joined in this activity
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returns A list of buddy object paths
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"""
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ret = []
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for buddy in self._buddies:
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if buddy.props.valid:
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ret.append(buddy.object_path())
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return ret
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@dbus.service.method(_ACTIVITY_INTERFACE,
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in_signature="", out_signature="soao")
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def GetChannels(self):
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"""DBUS method to get the list of channels associated with this activity
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returns XXX - Not sure what this returns as get_channels doesn't actually return
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a list of channels!
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"""
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return self.get_channels()
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@dbus.service.method(_ACTIVITY_INTERFACE,
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in_signature="", out_signature="s")
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def GetName(self):
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"""DBUS method to get this activity's name
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returns Activity name
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"""
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return self.props.name
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# methods
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def object_path(self):
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"""Retrieves our dbus.ObjectPath object
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returns DBUS ObjectPath object
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"""
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return dbus.ObjectPath(self._object_path)
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def get_joined_buddies(self):
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"""Local method to return a list of valid buddies who are joined in this activity
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This method is called by the PresenceService on the local machine.
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returns A list of buddy objects
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"""
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ret = []
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for buddy in self._buddies:
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if buddy.props.valid:
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ret.append(buddy)
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return ret
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def buddy_joined(self, buddy):
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"""Adds a buddy to this activity and sends a BuddyJoined signal
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buddy -- Buddy object representing the buddy being added
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Adds a buddy to this activity if the buddy is not already in the buddy list.
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If this activity is "valid", a BuddyJoined signal is also sent.
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This method is called by the PresenceService on the local machine.
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"""
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if buddy not in self._buddies:
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self._buddies.append(buddy)
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if self.props.valid:
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self.BuddyJoined(buddy.object_path())
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def buddy_left(self, buddy):
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"""Removes a buddy from this activity and sends a BuddyLeft signal.
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buddy -- Buddy object representing the buddy being removed
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Removes a buddy from this activity if the buddy is in the buddy list.
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If this activity is "valid", a BuddyLeft signal is also sent.
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This method is called by the PresenceService on the local machine.
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"""
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if buddy in self._buddies:
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self._buddies.remove(buddy)
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if self.props.valid:
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self.BuddyLeft(buddy.object_path())
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def _handle_share_join(self, tp, text_channel):
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"""Called when a join to a network activity was successful.
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Called by the _shared_cb and _joined_cb methods.
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"""
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if not text_channel:
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logging.debug("Error sharing: text channel was None, shouldn't happen")
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raise RuntimeError("Plugin returned invalid text channel")
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self._text_channel = text_channel
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self._text_channel[CHANNEL_INTERFACE].connect_to_signal('Closed',
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self._text_channel_closed_cb)
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self._joined = True
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return True
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def _shared_cb(self, tp, activity_id, text_channel, exc, userdata):
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"""XXX - not documented yet
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"""
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if activity_id != self.props.id:
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# Not for us
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return
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(sigid, owner, async_cb, async_err_cb) = userdata
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self._tp.disconnect(sigid)
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if exc:
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logging.debug("Share of activity %s failed: %s" % (self._id, exc))
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async_err_cb(exc)
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else:
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self._handle_share_join(tp, text_channel)
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self.send_properties()
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owner.add_activity(self)
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async_cb(dbus.ObjectPath(self._object_path))
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logging.debug("Share of activity %s succeeded." % self._id)
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def _share(self, (async_cb, async_err_cb), owner):
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"""XXX - not documented yet
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XXX - This method is called externally by the PresenceService despite the fact
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that this is supposed to be an internal method!
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"""
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logging.debug("Starting share of activity %s" % self._id)
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if self._joined:
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async_err_cb(RuntimeError("Already shared activity %s" % self.props.id))
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return
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sigid = self._tp.connect('activity-shared', self._shared_cb)
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self._tp.share_activity(self.props.id, (sigid, owner, async_cb, async_err_cb))
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logging.debug("done with share attempt %s" % self._id)
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def _joined_cb(self, tp, activity_id, text_channel, exc, userdata):
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"""XXX - not documented yet
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"""
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if activity_id != self.props.id:
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# Not for us
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return
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(sigid, async_cb, async_err_cb) = userdata
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self._tp.disconnect(sigid)
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if exc:
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async_err_cb(exc)
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else:
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self._handle_share_join(tp, text_channel)
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async_cb()
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def join(self, async_cb, async_err_cb):
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"""Local method for the local user to attempt to join the activity.
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async_cb -- Callback method to be called if join attempt is successful
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async_err_cb -- Callback method to be called if join attempt is unsuccessful
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The two callbacks are passed to the server_plugin ("tp") object, which in turn
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passes them back as parameters in a callback to the _joined_cb method; this
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callback is set up within this method.
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"""
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if self._joined:
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async_err_cb(RuntimeError("Already joined activity %s" % self.props.id))
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return
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sigid = self._tp.connect('activity-joined', self._joined_cb)
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self._tp.join_activity(self.props.id, (sigid, async_cb, async_err_cb))
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def get_channels(self):
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"""Local method to get the list of channels associated with this activity
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returns XXX - expected a list of channels, instead returning a tuple? ???
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"""
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conn = self._tp.get_connection()
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# FIXME add tubes and others channels
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return str(conn.service_name), conn.object_path, [self._text_channel.object_path]
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def leave(self):
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"""Local method called when the user wants to leave the activity.
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(XXX - doesn't appear to be called anywhere!)
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"""
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if self._joined:
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self._text_channel[CHANNEL_INTERFACE].Close()
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def _text_channel_closed_cb(self):
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"""Callback method called when the text channel is closed.
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This callback is set up in the _handle_share_join method.
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"""
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self._joined = False
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self._text_channel = None
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def send_properties(self):
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"""Tells the Telepathy server what the properties of this activity are.
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"""
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props = {}
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props['name'] = self._name
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props['color'] = self._color
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props['type'] = self._type
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# Add custom properties
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for (key, value) in self._custom_props.items():
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props[key] = value
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self._tp.set_activity_properties(self.props.id, props)
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def set_properties(self, properties):
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"""Sets name, colour and/or type properties for this activity all at once.
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properties - Dictionary object containing properties keyed by property names
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Note that if any of the name, colour and/or type property values is changed from
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what it originally was, the update_validity method will be called, resulting in
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a "validity-changed" signal being generated. Called by the PresenceService
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on the local machine.
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"""
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changed = False
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# split reserved properties from activity-custom properties
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(rprops, cprops) = self._split_properties(properties)
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if _PROP_NAME in rprops.keys():
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name = rprops[_PROP_NAME]
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if name != self._name:
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self._name = name
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changed = True
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if _PROP_COLOR in rprops.keys():
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color = rprops[_PROP_COLOR]
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if color != self._color:
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self._color = color
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changed = True
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if _PROP_TYPE in rprops.keys():
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type = rprops[_PROP_TYPE]
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# Type can never be changed after first set
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if self._type:
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logging.debug("Activity type changed by network; this is illegal")
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else:
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if type != self._type:
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self._type = type
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changed = True
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# Set custom properties
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if len(cprops.keys()) > 0:
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self.props.custom_props = cprops
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if changed:
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self._update_validity()
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def _split_properties(self, properties):
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"""Extracts reserved properties.
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properties - Dictionary object containing properties keyed by property names
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returns a tuple of 2 dictionaries, reserved properties and custom properties
|
|
"""
|
|
rprops = {}
|
|
cprops = {}
|
|
for (key, value) in properties.items():
|
|
if key in self._RESERVED_PROPNAMES:
|
|
rprops[key] = value
|
|
else:
|
|
cprops[key] = value
|
|
return (rprops, cprops)
|