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      1 // Copyright (c) 2012 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/sync/glue/search_engine_data_type_controller.h"
      6 
      7 #include "base/metrics/histogram.h"
      8 #include "chrome/browser/profiles/profile.h"
      9 #include "chrome/browser/search_engines/template_url_service_factory.h"
     10 #include "chrome/browser/sync/glue/chrome_report_unrecoverable_error.h"
     11 #include "chrome/browser/sync/profile_sync_service.h"
     12 #include "content/public/browser/browser_thread.h"
     13 #include "sync/api/syncable_service.h"
     14 
     15 using content::BrowserThread;
     16 
     17 namespace browser_sync {
     18 
     19 SearchEngineDataTypeController::SearchEngineDataTypeController(
     20     SyncApiComponentFactory* sync_factory,
     21     Profile* profile,
     22     const DisableTypeCallback& disable_callback)
     23     : UIDataTypeController(
     24           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI),
     25           base::Bind(&ChromeReportUnrecoverableError),
     26           disable_callback,
     27           syncer::SEARCH_ENGINES,
     28           sync_factory),
     29       profile_(profile) {
     30 }
     31 
     32 TemplateURLService::Subscription*
     33 SearchEngineDataTypeController::GetSubscriptionForTesting() {
     34   return template_url_subscription_.get();
     35 }
     36 
     37 SearchEngineDataTypeController::~SearchEngineDataTypeController() {}
     38 
     39 // We want to start the TemplateURLService before we begin associating.
     40 bool SearchEngineDataTypeController::StartModels() {
     41   // If the TemplateURLService is loaded, continue with association. We force
     42   // a load here to prevent the rest of Sync from waiting on
     43   // TemplateURLService's lazy load.
     44   TemplateURLService* turl_service =
     45       TemplateURLServiceFactory::GetForProfile(profile_);
     46   DCHECK(turl_service);
     47   turl_service->Load();
     48   if (turl_service->loaded()) {
     49     return true;  // Continue to Associate().
     50   }
     51 
     52   // Register a callback and continue when the TemplateURLService is loaded.
     53   template_url_subscription_ = turl_service->RegisterOnLoadedCallback(
     54       base::Bind(&SearchEngineDataTypeController::OnTemplateURLServiceLoaded,
     55                  this));
     56 
     57   return false;  // Don't continue Start.
     58 }
     59 
     60 void SearchEngineDataTypeController::StopModels() {
     61   template_url_subscription_.reset();
     62 }
     63 
     64 void SearchEngineDataTypeController::OnTemplateURLServiceLoaded() {
     65   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     66   DCHECK_EQ(state_, MODEL_STARTING);
     67   template_url_subscription_.reset();
     68   OnModelLoaded();
     69 }
     70 
     71 }  // namespace browser_sync
     72