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#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_OVERRIDE_REGISTRAR_H_
6#define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_OVERRIDE_REGISTRAR_H_
7
8#include "base/basictypes.h"
9#include "base/scoped_observer.h"
10#include "extensions/browser/browser_context_keyed_api_factory.h"
11#include "extensions/browser/extension_registry_observer.h"
12
13namespace content {
14class BrowserContext;
15}
16
17namespace extensions {
18class ExtensionRegistry;
19
20class ExtensionWebUIOverrideRegistrar : public BrowserContextKeyedAPI,
21                                        public ExtensionRegistryObserver {
22 public:
23  explicit ExtensionWebUIOverrideRegistrar(content::BrowserContext* context);
24  virtual ~ExtensionWebUIOverrideRegistrar();
25
26  // BrowserContextKeyedAPI implementation.
27  static BrowserContextKeyedAPIFactory<ExtensionWebUIOverrideRegistrar>*
28      GetFactoryInstance();
29
30 private:
31  friend class BrowserContextKeyedAPIFactory<ExtensionWebUIOverrideRegistrar>;
32
33  // ExtensionRegistryObserver implementation.
34  virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
35                                 const Extension* extension) OVERRIDE;
36  virtual void OnExtensionUnloaded(
37      content::BrowserContext* browser_context,
38      const Extension* extension,
39      UnloadedExtensionInfo::Reason reason) OVERRIDE;
40
41  // BrowserContextKeyedAPI implementation.
42  static const char* service_name() {
43    return "ExtensionWebUIOverrideRegistrar";
44  }
45
46  // Listen to extension load, unloaded notifications.
47  ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
48      extension_registry_observer_;
49
50  DISALLOW_COPY_AND_ASSIGN(ExtensionWebUIOverrideRegistrar);
51};
52
53}  // namespace extensions
54
55#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_OVERRIDE_REGISTRAR_H_
56