| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_OMNIBOX_ANSWERS_CACHE_H_ |
| #define COMPONENTS_OMNIBOX_ANSWERS_CACHE_H_ |
| |
| #include <list> |
| |
| #include "base/basictypes.h" |
| #include "base/strings/string16.h" |
| |
| struct AnswersQueryData { |
| AnswersQueryData(); |
| AnswersQueryData(const base::string16& full_query_text, |
| const base::string16& query_type); |
| base::string16 full_query_text; |
| base::string16 query_type; |
| }; |
| |
| // Cache for the most-recently seen answer for Answers in Suggest. |
| class AnswersCache { |
| public: |
| explicit AnswersCache(size_t max_entries); |
| ~AnswersCache(); |
| |
| // Gets the top answer query completion for the query term. The query data |
| // will contain empty query text and type if no matching data was found. |
| AnswersQueryData GetTopAnswerEntry(const base::string16& query); |
| |
| // Registers a query that received an answer suggestion. |
| void UpdateRecentAnswers(const base::string16& full_query_text, |
| const base::string16& query_type); |
| |
| // Signals if cache is empty. |
| bool empty() const { return cache_.empty(); } |
| |
| private: |
| size_t max_entries_; |
| typedef std::list<AnswersQueryData> Cache; |
| Cache cache_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AnswersCache); |
| }; |
| |
| #endif // COMPONENTS_OMNIBOX_ANSWERS_CACHE_H_ |