chrome/browser/extensions/api/settings_overrides/settings_overrides_api.h

   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
  16 class TemplateURL;
  17
  18 namespace extensions {
  19 class ExtensionRegistry;
  20
  21 class 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
  76 template <>
  77 void BrowserContextKeyedAPIFactory<
  78     SettingsOverridesAPI>::DeclareFactoryDependencies();
  79
  80 }  // namespace extensions
  81
  82 #endif  // CHROME_BROWSER_EXTENSIONS_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_