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#ifndef COMPONENTS_SUGGESTIONS_SUGGESTIONS_UTILS_H_ 6#define COMPONENTS_SUGGESTIONS_SUGGESTIONS_UTILS_H_ 7 8namespace suggestions { 9 10// Establishes the different sync states that users of SuggestionsService can 11// specify. There are three different concepts in the sync service: initialized, 12// sync enabled and history sync enabled. 13enum SyncState { 14 // State: Sync service is not initialized, yet not disabled. History sync 15 // state is unknown (since not initialized). 16 // Behavior: Does not issue a server request, but serves from cache if 17 // available. 18 NOT_INITIALIZED_ENABLED, 19 20 // State: Sync service is initialized, sync is enabled and history sync is 21 // enabled. 22 // Behavior: Update suggestions from the server. Serve from cache on timeout. 23 INITIALIZED_ENABLED_HISTORY, 24 25 // State: Sync service is disabled or history sync is disabled. 26 // Behavior: Do not issue a server request. Clear the cache. Serve empty 27 // suggestions. 28 SYNC_OR_HISTORY_SYNC_DISABLED, 29}; 30 31// Users of SuggestionsService should always use this function to get SyncState. 32SyncState GetSyncState(bool sync_enabled, 33 bool sync_initialized, 34 bool history_sync_enabled); 35 36} // namespace suggestions 37 38#endif // COMPONENTS_SUGGESTIONS_SUGGESTIONS_UTILS_H_ 39