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      1 // Copyright (c) 2011 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 #include "chrome/browser/extensions/extension_pref_store.h"
      6 
      7 #include "base/values.h"
      8 #include "chrome/browser/extensions/extension_pref_value_map.h"
      9 
     10 ExtensionPrefStore::ExtensionPrefStore(
     11     ExtensionPrefValueMap* extension_pref_value_map,
     12     bool incognito_pref_store)
     13     : extension_pref_value_map_(extension_pref_value_map),
     14       incognito_pref_store_(incognito_pref_store) {
     15   extension_pref_value_map_->AddObserver(this);
     16 }
     17 
     18 ExtensionPrefStore::~ExtensionPrefStore() {
     19   if (extension_pref_value_map_)
     20     extension_pref_value_map_->RemoveObserver(this);
     21 }
     22 
     23 void ExtensionPrefStore::OnInitializationCompleted() {
     24   NotifyInitializationCompleted();
     25 }
     26 
     27 void ExtensionPrefStore::OnPrefValueChanged(const std::string& key) {
     28   CHECK(extension_pref_value_map_);
     29   const Value *winner =
     30       extension_pref_value_map_->GetEffectivePrefValue(key,
     31                                                        incognito_pref_store_,
     32                                                        NULL);
     33   if (winner)
     34     SetValue(key, winner->DeepCopy());
     35   else
     36     RemoveValue(key);
     37 }
     38 
     39 void ExtensionPrefStore::OnExtensionPrefValueMapDestruction() {
     40   CHECK(extension_pref_value_map_);
     41   extension_pref_value_map_->RemoveObserver(this);
     42   extension_pref_value_map_ = NULL;
     43 }
     44