Add ICU message format support
[chromium-blink-merge.git] / extensions / browser / api / storage / storage_frontend.h
blobf1c82874479b5ec0a3fe81dc637a34d21492baa7
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.
5 #ifndef EXTENSIONS_BROWSER_API_STORAGE_STORAGE_FRONTEND_H_
6 #define EXTENSIONS_BROWSER_API_STORAGE_STORAGE_FRONTEND_H_
8 #include <map>
9 #include <string>
11 #include "base/memory/ref_counted.h"
12 #include "base/memory/scoped_ptr.h"
13 #include "extensions/browser/api/storage/settings_namespace.h"
14 #include "extensions/browser/api/storage/settings_observer.h"
15 #include "extensions/browser/api/storage/settings_storage_factory.h"
16 #include "extensions/browser/api/storage/value_store_cache.h"
17 #include "extensions/browser/browser_context_keyed_api_factory.h"
19 namespace content {
20 class BrowserContext;
23 namespace extensions {
25 // The component of the Storage API which runs on the UI thread.
26 class StorageFrontend : public BrowserContextKeyedAPI {
27 public:
28 // Returns the current instance for |context|.
29 static StorageFrontend* Get(content::BrowserContext* context);
31 // Creates with a specific |storage_factory|.
32 static scoped_ptr<StorageFrontend> CreateForTesting(
33 const scoped_refptr<SettingsStorageFactory>& storage_factory,
34 content::BrowserContext* context);
36 // Public so tests can create and delete their own instances.
37 ~StorageFrontend() override;
39 // Returns the value store cache for |settings_namespace|.
40 ValueStoreCache* GetValueStoreCache(
41 settings_namespace::Namespace settings_namespace) const;
43 // Returns true if |settings_namespace| is a valid namespace.
44 bool IsStorageEnabled(settings_namespace::Namespace settings_namespace) const;
46 // Runs |callback| with the storage area of the given |settings_namespace|
47 // for the |extension|.
48 void RunWithStorage(scoped_refptr<const Extension> extension,
49 settings_namespace::Namespace settings_namespace,
50 const ValueStoreCache::StorageCallback& callback);
52 // Deletes the settings for the given |extension_id|.
53 void DeleteStorageSoon(const std::string& extension_id);
55 // Gets the thread-safe observer list.
56 scoped_refptr<SettingsObserverList> GetObservers();
58 void DisableStorageForTesting(
59 settings_namespace::Namespace settings_namespace);
61 // BrowserContextKeyedAPI implementation.
62 static BrowserContextKeyedAPIFactory<StorageFrontend>* GetFactoryInstance();
63 static const char* service_name();
64 static const bool kServiceRedirectedInIncognito = true;
65 static const bool kServiceIsNULLWhileTesting = true;
67 private:
68 friend class BrowserContextKeyedAPIFactory<StorageFrontend>;
70 typedef std::map<settings_namespace::Namespace, ValueStoreCache*> CacheMap;
72 // Constructor for normal BrowserContextKeyedAPI usage.
73 explicit StorageFrontend(content::BrowserContext* context);
75 // Constructor for tests.
76 StorageFrontend(const scoped_refptr<SettingsStorageFactory>& storage_factory,
77 content::BrowserContext* context);
79 void Init(const scoped_refptr<SettingsStorageFactory>& storage_factory);
81 // The (non-incognito) browser context this Frontend belongs to.
82 content::BrowserContext* const browser_context_;
84 // List of observers to settings changes.
85 scoped_refptr<SettingsObserverList> observers_;
87 // Observer for |browser_context_|.
88 scoped_ptr<SettingsObserver> browser_context_observer_;
90 // Maps a known namespace to its corresponding ValueStoreCache. The caches
91 // are owned by this object.
92 CacheMap caches_;
94 DISALLOW_COPY_AND_ASSIGN(StorageFrontend);
97 } // namespace extensions
99 #endif // EXTENSIONS_BROWSER_API_STORAGE_STORAGE_FRONTEND_H_