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# Copyright (C) 2006-2007 Red Hat, Inc.
# Copyright (C) 2007 One Laptop Per Child
#
# 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 dbus
import gobject
_ACTIVITY_REGISTRY_SERVICE_NAME = 'org.laptop.ActivityRegistry'
_ACTIVITY_REGISTRY_IFACE = 'org.laptop.ActivityRegistry'
_ACTIVITY_REGISTRY_PATH = '/org/laptop/ActivityRegistry'
def _activity_info_from_dict(info_dict):
if not info_dict:
return None
return ActivityInfo(info_dict['name'], info_dict['icon'],
info_dict['service_name'], info_dict['path'],
info_dict['show_launcher'])
class ActivityInfo(object):
def __init__(self, name, icon, service_name, path, show_launcher):
self.name = name
self.icon = icon
self.service_name = service_name
self.path = path
self.show_launcher = show_launcher
class ActivityRegistry(gobject.GObject):
__gsignals__ = {
'activity-added': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT]))
}
def __init__(self):
gobject.GObject.__init__(self)
bus = dbus.SessionBus()
bus_object = bus.get_object(_ACTIVITY_REGISTRY_SERVICE_NAME,
_ACTIVITY_REGISTRY_PATH)
self._registry = dbus.Interface(bus_object, _ACTIVITY_REGISTRY_IFACE)
self._registry.connect_to_signal('ActivityAdded', self._activity_added_cb)
# Two caches fo saving some travel across dbus.
self._service_name_to_activity_info = {}
self._mime_type_to_activities = {}
def _convert_info_list(self, info_list):
result = []
for info_dict in info_list:
result.append(_activity_info_from_dict(info_dict))
return result
def get_activities(self):
info_list = self._registry.GetActivities()
return self._convert_info_list(info_list)
def get_activity(self, service_name):
if self._service_name_to_activity_info.has_key(service_name):
return self._service_name_to_activity_info[service_name]
info_dict = self._registry.GetActivity(service_name)
activity_info = _activity_info_from_dict(info_dict)
self._service_name_to_activity_info[service_name] = activity_info
return activity_info
def find_activity(self, name):
info_list = self._registry.FindActivity(name)
return self._convert_info_list(info_list)
def get_activities_for_type(self, mime_type):
if self._mime_type_to_activities.has_key(mime_type):
return self._mime_type_to_activities[mime_type]
info_list = self._registry.GetActivitiesForType(mime_type)
activities = self._convert_info_list(info_list)
self._mime_type_to_activities[mime_type] = activities
return activities
def add_bundle(self, bundle_path):
return self._registry.AddBundle(bundle_path)
def _activity_added_cb(self, info_dict):
logging.debug('ActivityRegistry._activity_added_cb: flushing caches')
self._service_name_to_activity_info.clear()
self._mime_type_to_activities.clear()
self.emit('activity-added', _activity_info_from_dict(info_dict))
_registry = None
def get_registry():
global _registry
if not _registry:
_registry = ActivityRegistry()
return _registry
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