| // Copyright 2016 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_NTP_SNIPPETS_SECTION_RANKERS_CONSTANT_SECTION_RANKER_H_ |
| #define COMPONENTS_NTP_SNIPPETS_SECTION_RANKERS_CONSTANT_SECTION_RANKER_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/time/time.h" |
| #include "components/ntp_snippets/category.h" |
| #include "components/ntp_snippets/category_rankers/category_ranker.h" |
| |
| namespace ntp_snippets { |
| |
| // Simple implementation of a CategoryRanker that never changes the order. For |
| // KnownCategories, the order is hardcoded. Remote categories must be added |
| // using |AppendCategoryIfNecessary|. They are sorted after all known |
| // categories. Among themselves their order is the same as the order they were |
| // added in. |
| class ConstantCategoryRanker : public CategoryRanker { |
| public: |
| ConstantCategoryRanker(); |
| ~ConstantCategoryRanker() override; |
| |
| // CategoryRanker implementation. |
| bool Compare(Category left, Category right) const override; |
| void ClearHistory(base::Time begin, base::Time end) override; |
| void AppendCategoryIfNecessary(Category category) override; |
| void InsertCategoryBeforeIfNecessary(Category category_to_insert, |
| Category anchor) override; |
| void InsertCategoryAfterIfNecessary(Category category_to_insert, |
| Category anchor) override; |
| std::vector<CategoryRanker::DebugDataItem> GetDebugData() override; |
| void OnSuggestionOpened(Category category) override; |
| void OnCategoryDismissed(Category category) override; |
| |
| static std::vector<KnownCategories> GetKnownCategoriesDefaultOrder(); |
| |
| private: |
| void AppendKnownCategory(KnownCategories known_category); |
| |
| std::vector<Category> ordered_categories_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ConstantCategoryRanker); |
| }; |
| |
| } // namespace ntp_snippets |
| |
| #endif // COMPONENTS_NTP_SNIPPETS_SECTION_RANKERS_CONSTANT_SECTION_RANKER_H_ |