1 // Copyright (c) 2010 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 // This file declares a helper class for selecting a supported language from a 6 // set of candidates. 7 8 #ifndef CHROME_INSTALLER_UTIL_LANGUAGE_SELECTOR_H_ 9 #define CHROME_INSTALLER_UTIL_LANGUAGE_SELECTOR_H_ 10 11 #include <string> 12 #include <vector> 13 14 #include "base/basictypes.h" 15 16 namespace installer { 17 18 // A helper class for selecting a supported language from a set of candidates. 19 // By default, the candidates are retrieved from the operating system. 20 class LanguageSelector { 21 public: 22 // Default constructor will select from the set of languages supported by the 23 // operating system. 24 LanguageSelector(); 25 26 // Constructor for testing purposes. 27 explicit LanguageSelector(const std::vector<std::wstring>& candidates); 28 29 ~LanguageSelector(); 30 31 // The offset of the matched language (i.e., IDS_L10N_OFFSET_*). offset()32 int offset() const { return offset_; } 33 34 // The full name of the candidate language for which a match was found. matched_candidate()35 const std::wstring& matched_candidate() const { return matched_candidate_; } 36 37 // The name of the selected translation. selected_translation()38 std::wstring selected_translation() const { return GetLanguageName(offset_); } 39 40 // Returns the name of a translation given its offset. 41 static std::wstring GetLanguageName(int offset); 42 43 private: 44 typedef bool (*SelectPred_Fn)(const std::wstring&, int*); 45 46 static bool SelectIf(const std::vector<std::wstring>& candidates, 47 SelectPred_Fn select_predicate, 48 std::wstring* matched_name, int* matched_offset); 49 void DoSelect(const std::vector<std::wstring>& candidates); 50 51 std::wstring matched_candidate_; 52 int offset_; 53 54 DISALLOW_COPY_AND_ASSIGN(LanguageSelector); 55 }; 56 57 } // namespace installer. 58 59 #endif // CHROME_INSTALLER_UTIL_LANGUAGE_SELECTOR_H_ 60