chrome/browser/prefs/chrome_pref_model_associator_client.cc

   1 // Copyright 2015 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/prefs/chrome_pref_model_associator_client.h"
   6
   7 #include "base/memory/singleton.h"
   8 #include "chrome/common/pref_names.h"
   9 #include "components/content_settings/core/browser/website_settings_info.h"
  10 #include "components/content_settings/core/browser/website_settings_registry.h"
  11
  12 namespace {
  13 // List of migrated preference name pairs. If a preference is migrated
  14 // (meaning renamed) adding the old and new preference names here will ensure
  15 // that the sync engine knows how to deal with the synced values coming in
  16 // with the old name. Preference migration itself doesn't happen here. It may
  17 // happen in session_startup_pref.cc.
  18 const struct MigratedPreferences {
  19   const char* const old_name;
  20   const char* const new_name;
  21 } kMigratedPreferences[] = {
  22     {prefs::kURLsToRestoreOnStartupOld, prefs::kURLsToRestoreOnStartup},
  23 };
  24 }  // namespace
  25
  26 // static
  27 ChromePrefModelAssociatorClient*
  28 ChromePrefModelAssociatorClient::GetInstance() {
  29   return base::Singleton<ChromePrefModelAssociatorClient>::get();
  30 }
  31
  32 ChromePrefModelAssociatorClient::ChromePrefModelAssociatorClient() {}
  33
  34 ChromePrefModelAssociatorClient::~ChromePrefModelAssociatorClient() {}
  35
  36 bool ChromePrefModelAssociatorClient::IsMergeableListPreference(
  37     const std::string& pref_name) const {
  38   return pref_name == prefs::kURLsToRestoreOnStartup;
  39 }
  40
  41 bool ChromePrefModelAssociatorClient::IsMergeableDictionaryPreference(
  42     const std::string& pref_name) const {
  43   const content_settings::WebsiteSettingsRegistry& registry =
  44       *content_settings::WebsiteSettingsRegistry::GetInstance();
  45   for (const content_settings::WebsiteSettingsInfo* info : registry) {
  46     if (info->pref_name() == pref_name)
  47       return true;
  48   }
  49   return false;
  50 }
  51
  52 bool ChromePrefModelAssociatorClient::IsMigratedPreference(
  53     const std::string& new_pref_name,
  54     std::string* old_pref_name) const {
  55   for (size_t i = 0; i < arraysize(kMigratedPreferences); ++i) {
  56     if (new_pref_name == kMigratedPreferences[i].new_name) {
  57       old_pref_name->assign(kMigratedPreferences[i].old_name);
  58       return true;
  59     }
  60   }
  61   return false;
  62 }
  63
  64 bool ChromePrefModelAssociatorClient::IsOldMigratedPreference(
  65     const std::string& old_pref_name,
  66     std::string* new_pref_name) const {
  67   for (size_t i = 0; i < arraysize(kMigratedPreferences); ++i) {
  68     if (old_pref_name == kMigratedPreferences[i].old_name) {
  69       new_pref_name->assign(kMigratedPreferences[i].new_name);
  70       return true;
  71     }
  72   }
  73   return false;
  74 }