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      1 // Copyright (c) 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 #include "chrome/common/spellcheck_common.h"
      6 
      7 #include "base/files/file_path.h"
      8 #include "base/logging.h"
      9 #include "third_party/icu/source/common/unicode/uloc.h"
     10 
     11 namespace chrome {
     12 namespace spellcheck_common {
     13 
     14 struct LanguageRegion {
     15   const char* language;  // The language.
     16   const char* language_region;  // language & region, used by dictionaries.
     17 };
     18 
     19 struct LanguageVersion {
     20   const char* language;  // The language input.
     21   const char* version;   // The corresponding version.
     22 };
     23 
     24 static const LanguageRegion g_supported_spellchecker_languages[] = {
     25   // Several languages are not to be included in the spellchecker list:
     26   // th-TH, vi-VI.
     27   {"af", "af-ZA"},
     28   {"bg", "bg-BG"},
     29   {"ca", "ca-ES"},
     30   {"cs", "cs-CZ"},
     31   {"da", "da-DK"},
     32   {"de", "de-DE"},
     33   {"el", "el-GR"},
     34   {"en-AU", "en-AU"},
     35   {"en-CA", "en-CA"},
     36   {"en-GB", "en-GB"},
     37   {"en-US", "en-US"},
     38   {"es", "es-ES"},
     39   {"et", "et-EE"},
     40   {"fo", "fo-FO"},
     41   {"fr", "fr-FR"},
     42   {"he", "he-IL"},
     43   {"hi", "hi-IN"},
     44   {"hr", "hr-HR"},
     45   {"hu", "hu-HU"},
     46   {"id", "id-ID"},
     47   {"it", "it-IT"},
     48   {"ko", "ko"},
     49   {"lt", "lt-LT"},
     50   {"lv", "lv-LV"},
     51   {"nb", "nb-NO"},
     52   {"nl", "nl-NL"},
     53   {"pl", "pl-PL"},
     54   {"pt-BR", "pt-BR"},
     55   {"pt-PT", "pt-PT"},
     56   {"ro", "ro-RO"},
     57   {"ru", "ru-RU"},
     58   {"sh", "sh"},
     59   {"sk", "sk-SK"},
     60   {"sl", "sl-SI"},
     61   {"sq", "sq"},
     62   {"sr", "sr"},
     63   {"sv", "sv-SE"},
     64   {"ta", "ta-IN"},
     65   {"tr", "tr-TR"},
     66   {"uk", "uk-UA"},
     67   {"vi", "vi-VN"},
     68 };
     69 
     70 bool IsValidRegion(const std::string& region) {
     71   for (size_t i = 0; i < arraysize(g_supported_spellchecker_languages);
     72        ++i) {
     73     if (g_supported_spellchecker_languages[i].language_region == region)
     74       return true;
     75   }
     76   return false;
     77 }
     78 
     79 // This function returns the language-region version of language name.
     80 // e.g. returns hi-IN for hi.
     81 std::string GetSpellCheckLanguageRegion(const std::string& input_language) {
     82   for (size_t i = 0; i < arraysize(g_supported_spellchecker_languages);
     83        ++i) {
     84     if (g_supported_spellchecker_languages[i].language == input_language) {
     85       return std::string(
     86           g_supported_spellchecker_languages[i].language_region);
     87     }
     88   }
     89 
     90   return input_language;
     91 }
     92 
     93 base::FilePath GetVersionedFileName(const std::string& input_language,
     94                                     const base::FilePath& dict_dir) {
     95   // The default dictionary version is 3-0. This version indicates that the bdic
     96   // file contains a checksum.
     97   static const char kDefaultVersionString[] = "-3-0";
     98 
     99   // Add non-default version strings here. Use the same version for all the
    100   // dictionaries that you add at the same time. Increment the major version
    101   // number if you're updating either dic or aff files. Increment the minor
    102   // version number if you're updating only dic_delta files.
    103   static LanguageVersion special_version_string[] = {
    104     {"tr-TR", "-4-0"},  // Jan 9, 2013: Add "FLAG num" to aff to avoid heapcheck
    105                         // crash.
    106   };
    107 
    108   // Generate the bdict file name using default version string or special
    109   // version string, depending on the language.
    110   std::string language = GetSpellCheckLanguageRegion(input_language);
    111   std::string versioned_bdict_file_name(language + kDefaultVersionString +
    112                                         ".bdic");
    113   for (size_t i = 0; i < arraysize(special_version_string); ++i) {
    114     if (language == special_version_string[i].language) {
    115       versioned_bdict_file_name =
    116           language + special_version_string[i].version + ".bdic";
    117       break;
    118     }
    119   }
    120 
    121   return dict_dir.AppendASCII(versioned_bdict_file_name);
    122 }
    123 
    124 std::string GetCorrespondingSpellCheckLanguage(const std::string& language) {
    125   // Look for exact match in the Spell Check language list.
    126   for (size_t i = 0; i < arraysize(g_supported_spellchecker_languages);
    127        ++i) {
    128     // First look for exact match in the language region of the list.
    129     std::string spellcheck_language(
    130         g_supported_spellchecker_languages[i].language);
    131     if (spellcheck_language == language)
    132       return language;
    133 
    134     // Next, look for exact match in the language_region part of the list.
    135     std::string spellcheck_language_region(
    136         g_supported_spellchecker_languages[i].language_region);
    137     if (spellcheck_language_region == language)
    138       return g_supported_spellchecker_languages[i].language;
    139   }
    140 
    141   // No match found - return blank.
    142   return std::string();
    143 }
    144 
    145 void SpellCheckLanguages(std::vector<std::string>* languages) {
    146   for (size_t i = 0; i < arraysize(g_supported_spellchecker_languages);
    147        ++i) {
    148     languages->push_back(g_supported_spellchecker_languages[i].language);
    149   }
    150 }
    151 
    152 void GetISOLanguageCountryCodeFromLocale(const std::string& locale,
    153                                          std::string* language_code,
    154                                          std::string* country_code) {
    155   DCHECK(language_code);
    156   DCHECK(country_code);
    157   char language[ULOC_LANG_CAPACITY] = ULOC_ENGLISH;
    158   const char* country = "USA";
    159   if (!locale.empty()) {
    160     UErrorCode error = U_ZERO_ERROR;
    161     char id[ULOC_LANG_CAPACITY + ULOC_SCRIPT_CAPACITY + ULOC_COUNTRY_CAPACITY];
    162     uloc_addLikelySubtags(locale.c_str(), id, arraysize(id), &error);
    163     error = U_ZERO_ERROR;
    164     uloc_getLanguage(id, language, arraysize(language), &error);
    165     country = uloc_getISO3Country(id);
    166   }
    167   *language_code = std::string(language);
    168   *country_code = std::string(country);
    169 }
    170 
    171 }  // namespace spellcheck_common
    172 }  // namespace chrome
    173