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# Copyright (C) 2007, Red Hat, Inc.
#
# 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 os
import gobject
from sugar.activity.bundle import Bundle
from sugar import env
from sugar import util
# http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
def _get_data_dirs():
if os.environ.has_key('XDG_DATA_DIRS'):
return os.environ['XDG_DATA_DIRS'].split(':')
else:
return [ '/usr/local/share/', '/usr/share/' ]
class _ServiceManager(object):
"""Internal class responsible for creating dbus service files
DBUS services are defined in files which bind a service name
to the name of an executable which provides the service name.
In Sugar, the service files are automatically generated from
the activity registry (by this class). When an activity's
dbus launch service is requested, dbus will launch the
specified executable in order to allow it to provide the
requested activity-launching service.
In the case of activities which provide a "class", instead of
an "exec" attribute in their activity.info, the
sugar-activity-factory script is used with an appropriate
argument to service that bundle.
"""
SERVICE_DIRECTORY = '~/.local/share/dbus-1/services'
def __init__(self):
service_dir = os.path.expanduser(self.SERVICE_DIRECTORY)
if not os.path.isdir(service_dir):
os.makedirs(service_dir)
self._path = service_dir
def add(self, bundle):
util.write_service(bundle.get_service_name(),
bundle.get_exec(), self._path)
class BundleRegistry(gobject.GObject):
"""Service that tracks the available activity bundles"""
__gsignals__ = {
'bundle-added': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT]))
}
def __init__(self):
gobject.GObject.__init__(self)
self._bundles = {}
self._search_path = []
self._service_manager = _ServiceManager()
def find_bundle(self, key):
"""Find a bundle in the registry"""
key = key.lower()
for bundle in self._bundles.values():
name = bundle.get_name().lower()
service_name = bundle.get_service_name().lower()
if name.find(key) != -1 or service_name.find(key) != -1:
return bundle
return None
def get_bundle(self, service_name):
"""Returns an bundle given his service name"""
if self._bundles.has_key(service_name):
return self._bundles[service_name]
else:
return None
def add_search_path(self, path):
"""Add a directory to the bundles search path"""
self._search_path.append(path)
self._scan_directory(path)
def __iter__(self):
return self._bundles.values().__iter__()
def _scan_directory(self, path):
if os.path.isdir(path):
for f in os.listdir(path):
bundle_dir = os.path.join(path, f)
if os.path.isdir(bundle_dir) and \
bundle_dir.endswith('.activity'):
self.add_bundle(bundle_dir)
def add_bundle(self, bundle_path):
bundle = Bundle(bundle_path)
if bundle.is_valid():
self._bundles[bundle.get_service_name()] = bundle
self._service_manager.add(bundle)
self.emit('bundle-added', bundle)
return True
else:
return False
def get_registry():
return _bundle_registry
_bundle_registry = BundleRegistry()
for path in _get_data_dirs():
bundles_path = os.path.join(path, 'activities')
_bundle_registry.add_search_path(bundles_path)
_bundle_registry.add_search_path(env.get_user_activities_path())
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