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/extensions/extension_web_ui.h"
   9 #include "chrome/browser/profiles/profile.h"
  10 #include "extensions/browser/extension_registry.h"
  11
  12 namespace extensions {
  13
  14 ExtensionWebUIOverrideRegistrar::ExtensionWebUIOverrideRegistrar(
  15     content::BrowserContext* context)
  16     : extension_registry_observer_(this) {
  17   extension_registry_observer_.Add(ExtensionRegistry::Get(context));
  18 }
  19
  20 ExtensionWebUIOverrideRegistrar::~ExtensionWebUIOverrideRegistrar() {
  21 }
  22
  23 void ExtensionWebUIOverrideRegistrar::OnExtensionLoaded(
  24     content::BrowserContext* browser_context,
  25     const Extension* extension) {
  26   ExtensionWebUI::RegisterChromeURLOverrides(
  27       Profile::FromBrowserContext(browser_context),
  28       URLOverrides::GetChromeURLOverrides(extension));
  29 }
  30
  31 void ExtensionWebUIOverrideRegistrar::OnExtensionUnloaded(
  32     content::BrowserContext* browser_context,
  33     const Extension* extension,
  34     UnloadedExtensionInfo::Reason reason) {
  35   ExtensionWebUI::UnregisterChromeURLOverrides(
  36       Profile::FromBrowserContext(browser_context),
  37       URLOverrides::GetChromeURLOverrides(extension));
  38 }
  39
  40 static base::LazyInstance<
  41     BrowserContextKeyedAPIFactory<ExtensionWebUIOverrideRegistrar> > g_factory =
  42     LAZY_INSTANCE_INITIALIZER;
  43
  44 // static
  45 BrowserContextKeyedAPIFactory<ExtensionWebUIOverrideRegistrar>*
  46 ExtensionWebUIOverrideRegistrar::GetFactoryInstance() {
  47   return g_factory.Pointer();
  48 }
  49
  50 }  // namespace extensions