src/chrome/browser/extensions/extension_web_ui_override_registrar.cc

   1 // Copyright (c) 2012 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.
   4
   5 #include "chrome/browser/extensions/extension_web_ui_override_registrar.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "chrome/browser/chrome_notification_types.h"
   9 #include "chrome/browser/extensions/extension_web_ui.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "content/public/browser/notification_details.h"
  12 #include "content/public/browser/notification_service.h"
  13
  14 namespace extensions {
  15
  16 ExtensionWebUIOverrideRegistrar::ExtensionWebUIOverrideRegistrar(
  17     Profile* profile) : profile_(profile) {
  18   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
  19                  content::Source<Profile>(profile));
  20   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
  21                  content::Source<Profile>(profile));
  22 }
  23
  24 ExtensionWebUIOverrideRegistrar::~ExtensionWebUIOverrideRegistrar() {
  25 }
  26
  27 void ExtensionWebUIOverrideRegistrar::Observe(
  28     int type,
  29     const content::NotificationSource& source,
  30     const content::NotificationDetails& details) {
  31   if (type == chrome::NOTIFICATION_EXTENSION_LOADED) {
  32     const Extension* extension =
  33         content::Details<const Extension>(details).ptr();
  34     ExtensionWebUI::RegisterChromeURLOverrides(
  35         profile_, URLOverrides::GetChromeURLOverrides(extension));
  36
  37   } else if (type == chrome::NOTIFICATION_EXTENSION_UNLOADED) {
  38     const Extension* extension =
  39         content::Details<UnloadedExtensionInfo>(details)->extension;
  40     ExtensionWebUI::UnregisterChromeURLOverrides(
  41         profile_, URLOverrides::GetChromeURLOverrides(extension));
  42   }
  43 }
  44
  45 static base::LazyInstance<
  46   ProfileKeyedAPIFactory<ExtensionWebUIOverrideRegistrar> >
  47     g_factory = LAZY_INSTANCE_INITIALIZER;
  48
  49 // static
  50 ProfileKeyedAPIFactory<ExtensionWebUIOverrideRegistrar>*
  51 ExtensionWebUIOverrideRegistrar::GetFactoryInstance() {
  52   return &g_factory.Get();
  53 }
  54
  55 }  // namespace extensions