components/translate/ios/browser/ios_translate_driver.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_TRANSLATE_IOS_BROWSER_IOS_TRANSLATE_DRIVER_H_
   6 #define COMPONENTS_TRANSLATE_IOS_BROWSER_IOS_TRANSLATE_DRIVER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "components/translate/core/browser/translate_driver.h"
  13 #include "components/translate/ios/browser/language_detection_controller.h"
  14 #include "components/translate/ios/browser/translate_controller.h"
  15 #include "ios/web/public/web_state/web_state_observer.h"
  16
  17 @class CRWJSInjectionReceiver;
  18
  19 namespace web {
  20 class NavigationManager;
  21 class WebState;
  22 }
  23
  24 namespace translate {
  25
  26 class TranslateManager;
  27
  28 // Content implementation of TranslateDriver.
  29 class IOSTranslateDriver : public TranslateDriver,
  30                            public TranslateController::Observer,
  31                            public web::WebStateObserver {
  32  public:
  33   IOSTranslateDriver(web::WebState* web_state,
  34                      web::NavigationManager* navigation_manager,
  35                      TranslateManager* translate_manager);
  36   ~IOSTranslateDriver() override;
  37
  38   LanguageDetectionController* language_detection_controller() {
  39     return language_detection_controller_.get();
  40   }
  41
  42   TranslateController* translate_controller() {
  43     return translate_controller_.get();
  44   }
  45
  46   // web::WebStateObserver methods.
  47   void NavigationItemCommitted(
  48       const web::LoadCommittedDetails& load_details) override;
  49
  50   // TranslateDriver methods.
  51   void OnIsPageTranslatedChanged() override;
  52   void OnTranslateEnabledChanged() override;
  53   bool IsLinkNavigation() override;
  54   void TranslatePage(int page_seq_no,
  55                      const std::string& translate_script,
  56                      const std::string& source_lang,
  57                      const std::string& target_lang) override;
  58   void RevertTranslation(int page_seq_no) override;
  59   bool IsOffTheRecord() override;
  60   const std::string& GetContentsMimeType() override;
  61   const GURL& GetLastCommittedURL() override;
  62   const GURL& GetActiveURL() override;
  63   const GURL& GetVisibleURL() override;
  64   bool HasCurrentPage() override;
  65   void OpenUrlInNewTab(const GURL& url) override;
  66
  67  private:
  68   // Called when the translation was successfull.
  69   void TranslationDidSucceed(const std::string& source_lang,
  70                              const std::string& target_lang,
  71                              int page_seq_no,
  72                              const std::string& original_page_language,
  73                              double translation_time);
  74   // Checks if the current running page translation is finished or errored and
  75   // notifies the browser accordingly.  If the translation has not terminated,
  76   // posts a task to check again later.
  77   // Similar to TranslateHelper::CheckTranslateStatus on desktop.
  78   void CheckTranslateStatus(const std::string& source_language,
  79                             const std::string& target_language,
  80                             int page_seq_no);
  81
  82   // Returns true if the user has not navigated away and the the page is not
  83   // being destroyed.
  84   bool IsPageValid(int page_seq_no) const;
  85
  86   // Callback for LanguageDetectionController.
  87   void OnLanguageDetermined(
  88       const LanguageDetectionController::DetectionDetails& details);
  89
  90   // TranslateController::Observer methods.
  91   void OnTranslateScriptReady(bool success,
  92                               double load_time,
  93                               double ready_time) override;
  94   void OnTranslateComplete(bool success,
  95                            const std::string& original_language,
  96                            double translation_time) override;
  97
  98   // The navigation manager of the tab we are associated with.
  99   web::NavigationManager* navigation_manager_;
 100
 101   base::WeakPtr<TranslateManager> translate_manager_;
 102   scoped_ptr<TranslateController> translate_controller_;
 103   scoped_ptr<LanguageDetectionController> language_detection_controller_;
 104   scoped_ptr<LanguageDetectionController::CallbackList::Subscription>
 105       language_detection_callback_subscription_;
 106
 107   // An ever-increasing sequence number of the current page, used to match up
 108   // translation requests with responses.
 109   // This matches the similar field in TranslateHelper in the renderer on other
 110   // platforms.
 111   int page_seq_no_;
 112
 113   // When a translation is in progress, its page sequence number is stored in
 114   // |pending_page_seq_no_|.
 115   int pending_page_seq_no_;
 116
 117   // Parameters of the current translation.
 118   std::string source_language_;
 119   std::string target_language_;
 120
 121   base::WeakPtrFactory<IOSTranslateDriver> weak_method_factory_;
 122
 123   DISALLOW_COPY_AND_ASSIGN(IOSTranslateDriver);
 124 };
 125
 126 }  // namespace translate
 127
 128 #endif  // COMPONENTS_TRANSLATE_IOS_BROWSER_IOS_TRANSLATE_DRIVER_H_