1// Copyright 2013 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_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_
6#define CHROME_BROWSER_EXTENSIONS_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_
7
8#include <set>
9#include <string>
10
11#include "base/scoped_observer.h"
12#include "chrome/browser/search_engines/template_url_service.h"
13#include "extensions/browser/browser_context_keyed_api_factory.h"
14#include "extensions/browser/extension_registry_observer.h"
15
16class TemplateURL;
17
18namespace extensions {
19class ExtensionRegistry;
20
21class SettingsOverridesAPI : public BrowserContextKeyedAPI,
22                             public ExtensionRegistryObserver {
23 public:
24  explicit SettingsOverridesAPI(content::BrowserContext* context);
25  virtual ~SettingsOverridesAPI();
26
27  // BrowserContextKeyedAPI implementation.
28  static BrowserContextKeyedAPIFactory<SettingsOverridesAPI>*
29      GetFactoryInstance();
30
31 private:
32  friend class BrowserContextKeyedAPIFactory<SettingsOverridesAPI>;
33
34  typedef std::set<scoped_refptr<const Extension> > PendingExtensions;
35
36  // Wrappers around PreferenceAPI.
37  void SetPref(const std::string& extension_id,
38               const std::string& pref_key,
39               base::Value* value);
40  void UnsetPref(const std::string& extension_id,
41                 const std::string& pref_key);
42
43  // ExtensionRegistryObserver implementation.
44  virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
45                                 const Extension* extension) OVERRIDE;
46  virtual void OnExtensionUnloaded(
47      content::BrowserContext* browser_context,
48      const Extension* extension,
49      UnloadedExtensionInfo::Reason reason) OVERRIDE;
50
51  // KeyedService implementation.
52  virtual void Shutdown() OVERRIDE;
53
54  void OnTemplateURLsLoaded();
55
56  void RegisterSearchProvider(const Extension* extension) const;
57  // BrowserContextKeyedAPI implementation.
58  static const char* service_name() { return "SettingsOverridesAPI"; }
59
60  Profile* profile_;
61  TemplateURLService* url_service_;
62
63  // List of extensions waiting for the TemplateURLService to Load to
64  // have search provider registered.
65  PendingExtensions pending_extensions_;
66
67  // Listen to extension load, unloaded notifications.
68  ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
69      extension_registry_observer_;
70
71  scoped_ptr<TemplateURLService::Subscription> template_url_sub_;
72
73  DISALLOW_COPY_AND_ASSIGN(SettingsOverridesAPI);
74};
75
76template <>
77void BrowserContextKeyedAPIFactory<
78    SettingsOverridesAPI>::DeclareFactoryDependencies();
79
80}  // namespace extensions
81
82#endif  // CHROME_BROWSER_EXTENSIONS_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_
83