| // Copyright 2017 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 IOS_CHROME_BROWSER_VOICE_VOICE_SEARCH_NAVIGATIONS_TAB_HELPER_H_ |
| #define IOS_CHROME_BROWSER_VOICE_VOICE_SEARCH_NAVIGATIONS_TAB_HELPER_H_ |
| |
| #import "ios/web/public/web_state/web_state_observer.h" |
| #import "ios/web/public/web_state/web_state_user_data.h" |
| |
| // A helper object that tracks which NavigationItems were created because of |
| // voice search queries. |
| class VoiceSearchNavigationTabHelper |
| : public web::WebStateObserver, |
| public web::WebStateUserData<VoiceSearchNavigationTabHelper> { |
| public: |
| // Notifies that the next navigation is the result of a voice |
| // search. |
| void WillLoadVoiceSearchResult(); |
| |
| // Returns whether the next committed navigation item is the result of a voice |
| // search. |
| bool IsExpectingVoiceSearch() const; |
| |
| private: |
| friend class web::WebStateUserData<VoiceSearchNavigationTabHelper>; |
| |
| // Private constructor. |
| explicit VoiceSearchNavigationTabHelper(web::WebState* web_state); |
| |
| // WebStateObserver: |
| void NavigationItemCommitted( |
| web::WebState* web_state, |
| const web::LoadCommittedDetails& load_details) override; |
| void WebStateDestroyed(web::WebState* web_state) override; |
| |
| // The WebState this instance is observing. Will be null after |
| // WebStateDestroyed has been called. |
| web::WebState* web_state_ = nullptr; |
| |
| // Whether a voice search navigation is expected. |
| bool will_navigate_to_voice_search_result_ = false; |
| |
| DISALLOW_COPY_AND_ASSIGN(VoiceSearchNavigationTabHelper); |
| }; |
| |
| #endif // IOS_CHROME_BROWSER_VOICE_VOICE_SEARCH_NAVIGATIONS_TAB_HELPER_H_ |