| // 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_TRANSLATE_IOS_BROWSER_LANGUAGE_DETECTION_CONTROLLER_H_ |
| #define COMPONENTS_TRANSLATE_IOS_BROWSER_LANGUAGE_DETECTION_CONTROLLER_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "base/callback_list.h" |
| #include "base/gtest_prod_util.h" |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/strings/string16.h" |
| #include "components/prefs/pref_member.h" |
| #include "ios/web/public/web_state/web_state_observer.h" |
| |
| class GURL; |
| @class JsLanguageDetectionManager; |
| class PrefService; |
| |
| namespace base { |
| class DictionaryValue; |
| } |
| |
| namespace web { |
| class WebState; |
| } |
| |
| namespace translate { |
| |
| class LanguageDetectionController : public web::WebStateObserver { |
| public: |
| // Language detection details, passed to language detection callbacks. |
| struct DetectionDetails { |
| // The language detected by the content (Content-Language). |
| std::string content_language; |
| |
| // The language written in the lang attribute of the html element. |
| std::string html_root_language; |
| |
| // The adopted language. |
| std::string adopted_language; |
| }; |
| |
| LanguageDetectionController(web::WebState* web_state, |
| JsLanguageDetectionManager* manager, |
| PrefService* prefs); |
| ~LanguageDetectionController() override; |
| |
| // Callback types for language detection events. |
| typedef base::Callback<void(const DetectionDetails&)> Callback; |
| typedef base::CallbackList<void(const DetectionDetails&)> CallbackList; |
| |
| // Registers a callback for language detection events. |
| std::unique_ptr<CallbackList::Subscription> RegisterLanguageDetectionCallback( |
| const Callback& callback); |
| |
| private: |
| FRIEND_TEST_ALL_PREFIXES(LanguageDetectionControllerTest, OnTextCaptured); |
| |
| // Starts the page language detection and initiates the translation process. |
| void StartLanguageDetection(); |
| |
| // Handles the "languageDetection.textCaptured" javascript command. |
| // |interacting| is true if the user is currently interacting with the page. |
| bool OnTextCaptured(const base::DictionaryValue& value, |
| const GURL& url, |
| bool interacting); |
| |
| // Completion handler used to retrieve the text buffered by the |
| // JsLanguageDetectionManager. |
| void OnTextRetrieved(const std::string& http_content_language, |
| const std::string& html_lang, |
| const base::string16& text); |
| |
| // web::WebStateObserver implementation: |
| void PageLoaded( |
| web::PageLoadCompletionStatus load_completion_status) override; |
| void UrlHashChanged() override; |
| void HistoryStateChanged() override; |
| void WebStateDestroyed() override; |
| |
| CallbackList language_detection_callbacks_; |
| JsLanguageDetectionManager* js_manager_; |
| BooleanPrefMember translate_enabled_; |
| base::WeakPtrFactory<LanguageDetectionController> weak_method_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LanguageDetectionController); |
| }; |
| |
| } // namespace translate |
| |
| #endif // COMPONENTS_TRANSLATE_IOS_BROWSER_LANGUAGE_DETECTION_CONTROLLER_H_ |