1 // Copyright 2013 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_LANGUAGE_LIST_H_ 6 #define CHROME_BROWSER_TRANSLATE_TRANSLATE_LANGUAGE_LIST_H_ 7 8 #include <set> 9 #include <string> 10 #include <vector> 11 12 #include "base/memory/scoped_ptr.h" 13 #include "base/time/time.h" 14 #include "chrome/browser/web_resource/resource_request_allowed_notifier.h" 15 16 class TranslateURLFetcher; 17 18 // The TranslateLanguageList class is responsible for maintaining the latest 19 // supporting language list. 20 // This class is defined to be owned only by TranslateManager. 21 class TranslateLanguageList : public ResourceRequestAllowedNotifier::Observer { 22 public: 23 static const int kFetcherId = 1; 24 25 TranslateLanguageList(); 26 virtual ~TranslateLanguageList(); 27 28 // Returns the last-updated time when the language list is fetched from the 29 // Translate server. Returns null time if the list is yet to be fetched. 30 base::Time last_updated() { return last_updated_; } 31 32 // Fills |languages| with the list of languages that the translate server can 33 // translate to and from. |languages| will include alpha languages. 34 void GetSupportedLanguages(std::vector<std::string>* languages); 35 36 // Returns the language code that can be used with the Translate method for a 37 // specified |chrome_locale|. 38 std::string GetLanguageCode(const std::string& chrome_locale); 39 40 // Returns true if |language| is supported by the translation server. It also 41 // returns true against alpha languages. 42 bool IsSupportedLanguage(const std::string& language); 43 44 // Returns true if |language| is supported by the translation server as a 45 // alpha language. 46 bool IsAlphaLanguage(const std::string& language); 47 48 // Fetches the language list from the translate server. It will retry 49 // automatically when a server return 5xx errors and retry count doesn't 50 // reach to limits. 51 void RequestLanguageList(); 52 53 // ResourceRequestAllowedNotifier::Observer implementation: 54 virtual void OnResourceRequestsAllowed() OVERRIDE; 55 56 // Disables the language list updater. This is used only for testing now. 57 static void DisableUpdate(); 58 59 // static const values shared with our browser tests. 60 static const char kLanguageListCallbackName[]; 61 static const char kTargetLanguagesKey[]; 62 static const char kAlphaLanguagesKey[]; 63 64 private: 65 // Callback function called when TranslateURLFetcher::Request() is finished. 66 void OnLanguageListFetchComplete(int id, 67 bool success, 68 const std::string& data); 69 70 // All the languages supported by the translation server. 71 std::set<std::string> all_supported_languages_; 72 73 // Alpha languages supported by the translation server. 74 std::set<std::string> alpha_languages_; 75 76 // A LanguageListFetcher instance to fetch a server providing supported 77 // language list including alpha languages. 78 scoped_ptr<TranslateURLFetcher> language_list_fetcher_; 79 80 // The last-updated time when the language list is sent. 81 base::Time last_updated_; 82 83 // Helper class to know if it's allowed to make network resource requests. 84 ResourceRequestAllowedNotifier resource_request_allowed_notifier_; 85 86 DISALLOW_COPY_AND_ASSIGN(TranslateLanguageList); 87 }; 88 89 #endif // CHROME_BROWSER_TRANSLATE_TRANSLATE_LANGUAGE_LIST_H_ 90
