chrome/browser/extensions/extension_action_storage_manager.h

   1 // Copyright 2014 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_ACTION_STORAGE_MANAGER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_STORAGE_MANAGER_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/scoped_observer.h"
  12 #include "chrome/browser/extensions/api/extension_action/extension_action_api.h"
  13 #include "extensions/browser/extension_registry_observer.h"
  14
  15 class ExtensionAction;
  16
  17 namespace content {
  18 class BrowserContext;
  19 }
  20
  21 namespace extensions {
  22 class ExtensionRegistry;
  23 class StateStore;
  24
  25 // This class manages reading and writing browser action values from storage.
  26 class ExtensionActionStorageManager : public ExtensionActionAPI::Observer,
  27                                       public ExtensionRegistryObserver {
  28  public:
  29   explicit ExtensionActionStorageManager(content::BrowserContext* context);
  30   ~ExtensionActionStorageManager() override;
  31
  32  private:
  33   // ExtensionActionAPI::Observer:
  34   void OnExtensionActionUpdated(
  35       ExtensionAction* extension_action,
  36       content::WebContents* web_contents,
  37       content::BrowserContext* browser_context) override;
  38   void OnExtensionActionAPIShuttingDown() override;
  39
  40   // ExtensionRegistryObserver:
  41   void OnExtensionLoaded(content::BrowserContext* browser_context,
  42                          const Extension* extension) override;
  43
  44   // Reads/Writes the ExtensionAction's default values to/from storage.
  45   void WriteToStorage(ExtensionAction* extension_action);
  46   void ReadFromStorage(
  47       const std::string& extension_id, scoped_ptr<base::Value> value);
  48
  49   // Returns the Extensions StateStore for the |browser_context_|.
  50   // May return NULL.
  51   StateStore* GetStateStore();
  52
  53   content::BrowserContext* browser_context_;
  54
  55   ScopedObserver<ExtensionActionAPI, ExtensionActionAPI::Observer>
  56       extension_action_observer_;
  57
  58   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
  59       extension_registry_observer_;
  60
  61   base::WeakPtrFactory<ExtensionActionStorageManager> weak_factory_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(ExtensionActionStorageManager);
  64 };
  65
  66 }  // namespace extensions
  67
  68 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_STORAGE_MANAGER_H_