| // Copyright 2021 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 CHROME_BROWSER_FONT_PREWARMER_TAB_HELPER_H_ |
| #define CHROME_BROWSER_FONT_PREWARMER_TAB_HELPER_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "content/public/browser/web_contents_observer.h" |
| #include "content/public/browser/web_contents_user_data.h" |
| |
| class Profile; |
| |
| namespace user_prefs { |
| class PrefRegistrySyncable; |
| } |
| |
| // FontPrewarmerTabHelper is responsible for tracking navigations to the search |
| // results page of the default search engine and prewarming the fonts that were |
| // previously used the last time a search results page of the default search |
| // engine was visited. |
| class FontPrewarmerTabHelper |
| : public content::WebContentsObserver, |
| public content::WebContentsUserData<FontPrewarmerTabHelper> { |
| public: |
| FontPrewarmerTabHelper(const FontPrewarmerTabHelper&) = delete; |
| FontPrewarmerTabHelper& operator=(const FontPrewarmerTabHelper&) = delete; |
| ~FontPrewarmerTabHelper() override; |
| |
| static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry); |
| |
| private: |
| friend class content::WebContentsUserData<FontPrewarmerTabHelper>; |
| friend class FontPrewarmerTabHelperTest; |
| |
| explicit FontPrewarmerTabHelper(content::WebContents* web_contents); |
| |
| // Testing helpers: |
| static std::string GetSearchResultsPagePrimaryFontsPref(); |
| static std::vector<std::string> GetPrimaryFontNames(Profile* profile); |
| |
| Profile* GetProfile(); |
| |
| // Returns true if the url of `navigation_handle` is a search results page of |
| // the default search provider. |
| bool IsSearchResultsPageNavigation( |
| content::NavigationHandle* navigation_handle); |
| |
| // content::WebContentsObserver implementation. |
| void DidStartNavigation( |
| content::NavigationHandle* navigation_handle) override; |
| void ReadyToCommitNavigation( |
| content::NavigationHandle* navigation_handle) override; |
| |
| absl::optional<int> expected_render_process_host_id_; |
| |
| WEB_CONTENTS_USER_DATA_KEY_DECL(); |
| }; |
| |
| #endif // CHROME_BROWSER_FONT_PREWARMER_TAB_HELPER_H_ |