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 #include "chrome/browser/search_engines/default_search_pref_migration.h" 6 7 #include "base/bind.h" 8 #include "base/bind_helpers.h" 9 #include "base/logging.h" 10 #include "base/memory/scoped_ptr.h" 11 #include "base/metrics/histogram.h" 12 #include "base/prefs/pref_service.h" 13 #include "chrome/browser/search_engines/default_search_manager.h" 14 #include "chrome/browser/search_engines/template_url_service.h" 15 #include "chrome/common/pref_names.h" 16 #include "components/search_engines/template_url_data.h" 17 18 namespace { 19 20 // Loads the user-selected DSE (if there is one, and it's not masked by policy 21 // or an extension) from legacy preferences. 22 scoped_ptr<TemplateURLData> LoadDefaultSearchProviderFromPrefs( 23 PrefService* pref_service) { 24 scoped_ptr<TemplateURLData> legacy_dse_from_prefs; 25 bool legacy_is_managed = false; 26 TemplateURLService::LoadDefaultSearchProviderFromPrefs( 27 pref_service, &legacy_dse_from_prefs, &legacy_is_managed); 28 return legacy_is_managed ? 29 scoped_ptr<TemplateURLData>() : legacy_dse_from_prefs.Pass(); 30 } 31 32 void ClearDefaultSearchProviderFromLegacyPrefs(PrefService* prefs) { 33 prefs->ClearPref(prefs::kDefaultSearchProviderName); 34 prefs->ClearPref(prefs::kDefaultSearchProviderKeyword); 35 prefs->ClearPref(prefs::kDefaultSearchProviderSearchURL); 36 prefs->ClearPref(prefs::kDefaultSearchProviderSuggestURL); 37 prefs->ClearPref(prefs::kDefaultSearchProviderInstantURL); 38 prefs->ClearPref(prefs::kDefaultSearchProviderImageURL); 39 prefs->ClearPref(prefs::kDefaultSearchProviderNewTabURL); 40 prefs->ClearPref(prefs::kDefaultSearchProviderSearchURLPostParams); 41 prefs->ClearPref(prefs::kDefaultSearchProviderSuggestURLPostParams); 42 prefs->ClearPref(prefs::kDefaultSearchProviderInstantURLPostParams); 43 prefs->ClearPref(prefs::kDefaultSearchProviderImageURLPostParams); 44 prefs->ClearPref(prefs::kDefaultSearchProviderIconURL); 45 prefs->ClearPref(prefs::kDefaultSearchProviderEncodings); 46 prefs->ClearPref(prefs::kDefaultSearchProviderPrepopulateID); 47 prefs->ClearPref(prefs::kDefaultSearchProviderAlternateURLs); 48 prefs->ClearPref(prefs::kDefaultSearchProviderSearchTermsReplacementKey); 49 } 50 51 void MigrateDefaultSearchPref(PrefService* pref_service) { 52 DCHECK(pref_service); 53 54 scoped_ptr<TemplateURLData> legacy_dse_from_prefs = 55 LoadDefaultSearchProviderFromPrefs(pref_service); 56 if (!legacy_dse_from_prefs) 57 return; 58 59 DefaultSearchManager default_search_manager( 60 pref_service, DefaultSearchManager::ObserverCallback()); 61 DefaultSearchManager::Source modern_source; 62 TemplateURLData* modern_value = 63 default_search_manager.GetDefaultSearchEngine(&modern_source); 64 if (modern_source == DefaultSearchManager::FROM_FALLBACK) { 65 // |modern_value| is the prepopulated default. If it matches the legacy DSE 66 // we assume it is not a user-selected value. 67 if (!modern_value || 68 legacy_dse_from_prefs->prepopulate_id != modern_value->prepopulate_id) { 69 // This looks like a user-selected value, so let's migrate it. 70 // TODO(erikwright): Remove this migration logic when this stat approaches 71 // zero. 72 UMA_HISTOGRAM_BOOLEAN("Search.MigratedPrefToDictionaryValue", true); 73 default_search_manager.SetUserSelectedDefaultSearchEngine( 74 *legacy_dse_from_prefs); 75 } 76 } 77 78 ClearDefaultSearchProviderFromLegacyPrefs(pref_service); 79 } 80 81 void OnPrefsInitialized(PrefService* pref_service, 82 bool pref_service_initialization_success) { 83 MigrateDefaultSearchPref(pref_service); 84 } 85 86 } // namespace 87 88 void ConfigureDefaultSearchPrefMigrationToDictionaryValue( 89 PrefService* pref_service) { 90 if (pref_service->GetInitializationStatus() == 91 PrefService::INITIALIZATION_STATUS_WAITING) { 92 pref_service->AddPrefInitObserver( 93 base::Bind(&OnPrefsInitialized, base::Unretained(pref_service))); 94 } else { 95 MigrateDefaultSearchPref(pref_service); 96 } 97 } 98
