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183 lines
7.0 KiB
Python
183 lines
7.0 KiB
Python
# Copyright (C) 2006-2007 Red Hat, Inc.
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# Copyright (C) 2007 One Laptop Per Child
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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 logging
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import dbus
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import gobject
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_ACTIVITY_REGISTRY_SERVICE_NAME = 'org.laptop.ActivityRegistry'
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_ACTIVITY_REGISTRY_IFACE = 'org.laptop.ActivityRegistry'
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_ACTIVITY_REGISTRY_PATH = '/org/laptop/ActivityRegistry'
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def _activity_info_from_dict(info_dict):
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if not info_dict:
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return None
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return ActivityInfo(info_dict['name'], info_dict['icon'],
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info_dict['bundle_id'], info_dict['version'],
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info_dict['path'], info_dict['show_launcher'],
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info_dict['command'], info_dict['favorite'])
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class ActivityInfo(object):
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def __init__(self, name, icon, bundle_id, version,
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path, show_launcher, command, favorite):
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self.name = name
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self.icon = icon
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self.bundle_id = bundle_id
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self.version = version
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self.path = path
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self.command = command
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self.show_launcher = show_launcher
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self.favorite = favorite
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class ActivityRegistry(gobject.GObject):
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__gsignals__ = {
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'activity-added': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'activity-removed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'activity-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT]))
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}
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def __init__(self):
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gobject.GObject.__init__(self)
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bus = dbus.SessionBus()
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# NOTE: We need to follow_name_owner_changes here
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# because we can not connect to a signal unless
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# we follow the changes or we start the service
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# before we connect. Starting the service here
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# causes a major bottleneck during startup
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bus_object = bus.get_object(_ACTIVITY_REGISTRY_SERVICE_NAME,
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_ACTIVITY_REGISTRY_PATH,
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follow_name_owner_changes = True)
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self._registry = dbus.Interface(bus_object, _ACTIVITY_REGISTRY_IFACE)
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self._registry.connect_to_signal('ActivityAdded',
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self._activity_added_cb)
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self._registry.connect_to_signal('ActivityRemoved',
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self._activity_removed_cb)
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self._registry.connect_to_signal('ActivityChanged',
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self._activity_changed_cb)
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# Two caches fo saving some travel across dbus.
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self._service_name_to_activity_info = {}
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self._mime_type_to_activities = {}
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def _convert_info_list(self, info_list):
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result = []
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for info_dict in info_list:
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result.append(_activity_info_from_dict(info_dict))
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return result
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def get_activities(self):
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info_list = self._registry.GetActivities()
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return self._convert_info_list(info_list)
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def _get_activities_cb(self, reply_handler, info_list):
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result = []
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for info_dict in info_list:
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result.append(_activity_info_from_dict(info_dict))
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reply_handler(result)
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def _get_activities_error_cb(self, error_handler, e):
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if error_handler:
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error_handler(e)
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else:
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logging.error('Error getting activities async: %s' % str(e))
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def get_activities_async(self, reply_handler=None, error_handler=None):
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if not reply_handler:
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logging.error('Function get_activities_async called' \
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'without a reply handler. Can not run.')
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return
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self._registry.GetActivities(
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reply_handler=lambda info_list: \
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self._get_activities_cb(reply_handler, info_list),
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error_handler=lambda e: \
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self._get_activities_error_cb(error_handler, e))
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def get_activity(self, service_name):
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if self._service_name_to_activity_info.has_key(service_name):
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return self._service_name_to_activity_info[service_name]
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info_dict = self._registry.GetActivity(service_name)
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activity_info = _activity_info_from_dict(info_dict)
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self._service_name_to_activity_info[service_name] = activity_info
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return activity_info
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def find_activity(self, name):
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info_list = self._registry.FindActivity(name)
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return self._convert_info_list(info_list)
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def get_activities_for_type(self, mime_type):
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if self._mime_type_to_activities.has_key(mime_type):
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return self._mime_type_to_activities[mime_type]
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info_list = self._registry.GetActivitiesForType(mime_type)
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activities = self._convert_info_list(info_list)
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self._mime_type_to_activities[mime_type] = activities
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return activities
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def add_bundle(self, bundle_path):
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result = self._registry.AddBundle(bundle_path)
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# Need to invalidate here because get_activity could be called after
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# add_bundle and before we receive activity-added, causing a race.
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self._invalidate_cache()
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return result
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def _activity_added_cb(self, info_dict):
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logging.debug('ActivityRegistry._activity_added_cb: invalidating cache')
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self._invalidate_cache()
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self.emit('activity-added', _activity_info_from_dict(info_dict))
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def _invalidate_cache(self):
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self._service_name_to_activity_info.clear()
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self._mime_type_to_activities.clear()
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def remove_bundle(self, bundle_path):
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self._invalidate_cache()
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return self._registry.RemoveBundle(bundle_path)
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def _activity_removed_cb(self, info_dict):
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logging.debug('ActivityRegistry._activity_removed_cb: flushing caches')
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self._invalidate_cache()
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self.emit('activity-removed', _activity_info_from_dict(info_dict))
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def _activity_changed_cb(self, info_dict):
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logging.debug('ActivityRegistry._activity_changed_cb: flushing caches')
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self._invalidate_cache()
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self.emit('activity-changed', _activity_info_from_dict(info_dict))
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def set_activity_favorite(self, bundle_id, version, favorite):
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self._registry.SetActivityFavorite(bundle_id, version, favorite)
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_registry = None
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def get_registry():
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global _registry
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if not _registry:
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_registry = ActivityRegistry()
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return _registry
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