components/translate/core/language_detection/language_detection_util.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_CORE_LANGUAGE_DETECTION_LANGUAGE_DETECTION_UTIL_H_
   6 #define COMPONENTS_TRANSLATE_CORE_LANGUAGE_DETECTION_LANGUAGE_DETECTION_UTIL_H_
   7
   8 #include <string>
   9
  10 #include "base/strings/string16.h"
  11
  12 namespace translate {
  13
  14 // Determines content page language from Content-Language code and contents.
  15 std::string DeterminePageLanguage(const std::string& code,
  16                                   const std::string& html_lang,
  17                                   const base::string16& contents,
  18                                   std::string* cld_language,
  19                                   bool* is_cld_reliable);
  20
  21 // Corrects language code if it contains well-known mistakes.
  22 // Called only by tests.
  23 void CorrectLanguageCodeTypo(std::string* code);
  24
  25 // Checks if the language code's format is valid.
  26 // Called only by tests.
  27 bool IsValidLanguageCode(const std::string& code);
  28
  29 // Checks if languages are matched, or similar. This function returns true
  30 // against a language pair containing a language which is difficult for CLD to
  31 // distinguish.
  32 // Called only by tests.
  33 bool IsSameOrSimilarLanguages(const std::string& page_language,
  34                               const std::string& cld_language);
  35
  36 // Checks if languages pair is one of well-known pairs of wrong server
  37 // configuration.
  38 // Called only by tests.
  39 bool MaybeServerWrongConfiguration(const std::string& page_language,
  40                                    const std::string& cld_language);
  41
  42 }  // namespace translate
  43
  44 #endif  // COMPONENTS_TRANSLATE_CORE_LANGUAGE_DETECTION_LANGUAGE_DETECTION_UTIL_H_