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| 1 // Copyright 2012 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 CHROME_BROWSER_TRANSLATE_TRANSLATE_MANAGER_H_ | |
| 6 #define CHROME_BROWSER_TRANSLATE_TRANSLATE_MANAGER_H_ | |
| 7 | |
| 8 #include <map> | |
| 9 #include <string> | |
| 10 #include <vector> | |
| 11 | |
| 12 #include "base/callback_list.h" | |
| 13 #include "base/gtest_prod_util.h" | |
| 14 #include "base/memory/scoped_ptr.h" | |
| 15 #include "base/memory/weak_ptr.h" | |
| 16 #include "components/translate/core/common/translate_errors.h" | |
| 17 | |
| 18 class GURL; | |
| 19 class PrefService; | |
| 20 class TranslateClient; | |
| 21 class TranslateDriver; | |
| 22 struct TranslateErrorDetails; | |
| 23 class TranslateTabHelper; | |
| 24 | |
| 25 // The TranslateManager class is responsible for showing an info-bar when a page | |
| 26 // in a language different than the user language is loaded. It triggers the | |
| 27 // page translation the user requests. | |
| 28 // TranslateManager expects its associated TranslateTabHelper to always have a | |
| 29 // valid WebContents (i.e. the WebContents is never destroyed within the | |
| 30 // lifetime of TranslateManager). | |
| 31 | |
| 32 class TranslateManager { | |
| 33 public: | |
| 34 // TranslateTabHelper is expected to outlive the TranslateManager. | |
| 35 // |accept_language_pref_name| is the path for the preference for the | |
| 36 // accept-languages. | |
| 37 TranslateManager(TranslateTabHelper* helper, | |
| 38 const std::string& accept_language_pref_name); | |
| 39 virtual ~TranslateManager(); | |
| 40 | |
| 41 // Returns the language to translate to. The language returned is the | |
| 42 // first language found in the following list that is supported by the | |
| 43 // translation service: | |
| 44 // the UI language | |
| 45 // the accept-language list | |
| 46 // If no language is found then an empty string is returned. | |
| 47 static std::string GetTargetLanguage( | |
| 48 const std::vector<std::string>& accept_languages_list); | |
| 49 | |
| 50 // Returns the language to automatically translate to. |original_language| is | |
| 51 // the webpage's original language. | |
| 52 static std::string GetAutoTargetLanguage(const std::string& original_language, | |
| 53 PrefService* prefs); | |
| 54 | |
| 55 // Translates the page contents from |source_lang| to |target_lang|. | |
| 56 // The actual translation might be performed asynchronously if the translate | |
| 57 // script is not yet available. | |
| 58 void TranslatePage(const std::string& source_lang, | |
| 59 const std::string& target_lang, | |
| 60 bool triggered_from_menu); | |
| 61 | |
| 62 // Starts the translation process for a page in the |page_lang| language. | |
| 63 void InitiateTranslation(const std::string& page_lang); | |
| 64 | |
| 65 // Shows the after translate or error infobar depending on the details. | |
| 66 void PageTranslated(const std::string& source_lang, | |
| 67 const std::string& target_lang, | |
| 68 TranslateErrors::Type error_type); | |
| 69 | |
| 70 // Reverts the contents of the page to its original language. | |
| 71 void RevertTranslation(); | |
| 72 | |
| 73 // Reports to the Google translate server that a page language was incorrectly | |
| 74 // detected. This call is initiated by the user selecting the "report" menu | |
| 75 // under options in the translate infobar. | |
| 76 void ReportLanguageDetectionError(); | |
| 77 | |
| 78 // Callback types for translate errors. | |
| 79 typedef base::Callback<void(const TranslateErrorDetails&)> | |
| 80 TranslateErrorCallback; | |
| 81 typedef base::CallbackList<void(const TranslateErrorDetails&)> | |
| 82 TranslateErrorCallbackList; | |
| 83 | |
| 84 // Registers a callback for translate errors. | |
| 85 static scoped_ptr<TranslateErrorCallbackList::Subscription> | |
| 86 RegisterTranslateErrorCallback(const TranslateErrorCallback& callback); | |
| 87 | |
| 88 private: | |
| 89 // Sends a translation request to the TranslateDriver. | |
| 90 void DoTranslatePage(const std::string& translate_script, | |
| 91 const std::string& source_lang, | |
| 92 const std::string& target_lang); | |
| 93 | |
| 94 // Called when the Translate script has been fetched. | |
| 95 // Initiates the translation. | |
| 96 void OnTranslateScriptFetchComplete(int page_id, | |
| 97 const std::string& source_lang, | |
| 98 const std::string& target_lang, | |
| 99 bool success, | |
| 100 const std::string& data); | |
| 101 | |
| 102 // Preference name for the Accept-Languages HTTP header. | |
| 103 std::string accept_languages_pref_name_; | |
| 104 | |
| 105 // TODO(droger): Remove all uses of |translate_tab_helper_|, use | |
| 106 // TranslateClient and TranslateDriver instead. | |
| 107 TranslateTabHelper* translate_tab_helper_; // Weak. | |
| 108 TranslateClient* translate_client_; // Weak. | |
| 109 TranslateDriver* translate_driver_; // Weak. | |
| 110 | |
| 111 base::WeakPtrFactory<TranslateManager> weak_method_factory_; | |
| 112 | |
| 113 DISALLOW_COPY_AND_ASSIGN(TranslateManager); | |
| 114 }; | |
| 115 | |
| 116 #endif // CHROME_BROWSER_TRANSLATE_TRANSLATE_MANAGER_H_ | |
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Chromium Code Reviews
Issue 224723025:
Componentize TranslateManager (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src