1 # Copyright 2014 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
7 from telemetry.core import extension_page
8 from telemetry.core.backends.chrome import inspector_backend_list
11 class ExtensionBackendList(inspector_backend_list.InspectorBackendList):
12 """A dynamic sequence of extension_page.ExtensionPages."""
14 def __init__(self, browser_backend):
15 super(ExtensionBackendList, self).__init__(
16 browser_backend, backend_wrapper=extension_page.ExtensionPage)
18 def ShouldIncludeContext(self, context):
19 return context['url'].startswith('chrome-extension://')
22 class ExtensionBackendDict(collections.Mapping):
23 """A dynamic mapping of extension_id to extension_page.ExtensionPages."""
25 def __init__(self, browser_backend):
26 self._extension_backend_list = ExtensionBackendList(browser_backend)
28 def __getitem__(self, extension_id):
30 for i, context_id in enumerate(self._extension_backend_list):
31 if self.ContextIdToExtensionId(context_id) == extension_id:
32 extensions.append(self._extension_backend_list[i])
34 raise KeyError('Cannot find an extension with id=%s' % extension_id)
38 for context_id in self._extension_backend_list:
39 yield self.ContextIdToExtensionId(context_id)
42 return len(self._extension_backend_list)
44 def ContextIdToExtensionId(self, context_id):
45 context = self._extension_backend_list.GetContextInfo(context_id)
46 return extension_page.UrlToExtensionId(context['url'])