android_webview/browser/aw_pref_store.h

   1 // Copyright (c) 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 ANDROID_WEBVIEW_BROWSER_AW_PREF_STORE_H_
   6 #define ANDROID_WEBVIEW_BROWSER_AW_PREF_STORE_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/observer_list.h"
  13 #include "base/prefs/persistent_pref_store.h"
  14 #include "base/prefs/pref_value_map.h"
  15
  16 // A light-weight prefstore implementation that keeps preferences
  17 // in a memory backed store. This is not a persistent prefstore -- we
  18 // subclass the PersistentPrefStore here since it is needed by the
  19 // PrefService, which in turn is needed by the Autofill component.
  20 class AwPrefStore : public PersistentPrefStore {
  21  public:
  22   AwPrefStore();
  23
  24   // Overriden from PrefStore.
  25   bool GetValue(const std::string& key,
  26                 const base::Value** result) const override;
  27   void AddObserver(PrefStore::Observer* observer) override;
  28   void RemoveObserver(PrefStore::Observer* observer) override;
  29   bool HasObservers() const override;
  30   bool IsInitializationComplete() const override;
  31
  32   // PersistentPrefStore overrides:
  33   bool GetMutableValue(const std::string& key, base::Value** result) override;
  34   void ReportValueChanged(const std::string& key) override;
  35   void SetValue(const std::string& key, base::Value* value) override;
  36   void SetValueSilently(const std::string& key, base::Value* value) override;
  37   void RemoveValue(const std::string& key) override;
  38   bool ReadOnly() const override;
  39   PrefReadError GetReadError() const override;
  40   PersistentPrefStore::PrefReadError ReadPrefs() override;
  41   void ReadPrefsAsync(ReadErrorDelegate* error_delegate) override;
  42   void CommitPendingWrite() override {}
  43
  44  protected:
  45   ~AwPrefStore() override;
  46
  47  private:
  48   // Stores the preference values.
  49   PrefValueMap prefs_;
  50
  51   ObserverList<PrefStore::Observer, true> observers_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(AwPrefStore);
  54 };
  55
  56 #endif  // ANDROID_WEBVIEW_BROWSER_AW_PREF_STORE_H_