Source code for envisage.tests.mutable_extension_registry
# (C) Copyright 2007-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
""" A mutable, manually populated extension registry used for testing. """
# Enthought library imports.
from envisage.api import ExtensionRegistry, UnknownExtension
[docs]class MutableExtensionRegistry(ExtensionRegistry):
"""A mutable, manually populated extension registry used for testing."""
###########################################################################
# 'MutableExtensionRegistry' interface.
###########################################################################
[docs] def add_extension(self, extension_point_id, extension):
"""Contribute an extension to an extension point."""
self.add_extensions(extension_point_id, [extension])
[docs] def add_extensions(self, extension_point_id, extensions):
"""Contribute a list of extensions to an extension point."""
self._check_extension_point(extension_point_id)
old = self._get_extensions(extension_point_id)
index = len(old)
old.extend(extensions)
# Let any listeners know that the extensions have been added.
refs = self._get_listener_refs(extension_point_id)
self._call_listeners(refs, extension_point_id, extensions, [], index)
[docs] def remove_extension(self, extension_point_id, extension):
"""Remove a contribution from an extension point."""
self.remove_extensions(extension_point_id, [extension])
[docs] def remove_extensions(self, extension_point_id, extensions):
"""Remove a list of contributions from an extension point."""
for extension in extensions:
try:
self._get_extensions(extension_point_id).remove(extension)
except ValueError:
raise UnknownExtension(extension_point_id, extension)
# Let any listeners know that the extensions have been removed.
refs = self._get_listener_refs(extension_point_id)
self._call_listeners(refs, extension_point_id, [], extensions, None)