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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/spellcheck_common.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/metrics/field_trial.h"
#include "base/strings/string_util.h"
#include "chrome/common/chrome_switches.h"
#include "third_party/icu/source/common/unicode/uloc.h"
#include "third_party/icu/source/common/unicode/urename.h"
#include "third_party/icu/source/common/unicode/utypes.h"
namespace chrome {
namespace spellcheck_common {
const char kMultilingualSpellcheckFieldTrial[] = "MultilingualSpellcheck";
struct LanguageRegion {
const char* language; // The language.
const char* language_region; // language & region, used by dictionaries.
};
struct LanguageVersion {
const char* language; // The language input.
const char* version; // The corresponding version.
};
static const LanguageRegion g_supported_spellchecker_languages[] = {
// Several languages are not to be included in the spellchecker list:
// th-TH, vi-VI.
{"af", "af-ZA"},
{"bg", "bg-BG"},
{"ca", "ca-ES"},
{"cs", "cs-CZ"},
{"da", "da-DK"},
{"de", "de-DE"},
{"el", "el-GR"},
{"en-AU", "en-AU"},
{"en-CA", "en-CA"},
{"en-GB", "en-GB"},
{"en-US", "en-US"},
{"es", "es-ES"},
{"et", "et-EE"},
{"fo", "fo-FO"},
{"fr", "fr-FR"},
{"he", "he-IL"},
{"hi", "hi-IN"},
{"hr", "hr-HR"},
{"hu", "hu-HU"},
{"id", "id-ID"},
{"it", "it-IT"},
{"ko", "ko"},
{"lt", "lt-LT"},
{"lv", "lv-LV"},
{"nb", "nb-NO"},
{"nl", "nl-NL"},
{"pl", "pl-PL"},
{"pt-BR", "pt-BR"},
{"pt-PT", "pt-PT"},
{"ro", "ro-RO"},
{"ru", "ru-RU"},
{"sh", "sh"},
{"sk", "sk-SK"},
{"sl", "sl-SI"},
{"sq", "sq"},
{"sr", "sr"},
{"sv", "sv-SE"},
{"ta", "ta-IN"},
{"tg", "tg-TG"},
{"tr", "tr-TR"},
{"uk", "uk-UA"},
{"vi", "vi-VN"},
};
bool IsValidRegion(const std::string& region) {
for (size_t i = 0; i < arraysize(g_supported_spellchecker_languages);
++i) {
if (g_supported_spellchecker_languages[i].language_region == region)
return true;
}
return false;
}
// This function returns the language-region version of language name.
// e.g. returns hi-IN for hi.
std::string GetSpellCheckLanguageRegion(const std::string& input_language) {
for (size_t i = 0; i < arraysize(g_supported_spellchecker_languages);
++i) {
if (g_supported_spellchecker_languages[i].language == input_language) {
return std::string(
g_supported_spellchecker_languages[i].language_region);
}
}
return input_language;
}
base::FilePath GetVersionedFileName(const std::string& input_language,
const base::FilePath& dict_dir) {
// The default dictionary version is 3-0. This version indicates that the bdic
// file contains a checksum.
static const char kDefaultVersionString[] = "-3-0";
// Add non-default version strings here. Use the same version for all the
// dictionaries that you add at the same time. Increment the major version
// number if you're updating either dic or aff files. Increment the minor
// version number if you're updating only dic_delta files.
static LanguageVersion special_version_string[] = {
{"tr-TR", "-4-0"}, // Jan 9, 2013: Add "FLAG num" to aff to avoid heapcheck
// crash.
{"tg-TG", "-5-0"}, // Mar 4, 2014: Add Tajik dictionary.
// Oct 28, 2014: Update from upstream, add new words.
{"en-AU", "-4-0"},
{"en-GB", "-4-0"},
// March 10, 2015: Update from upstream, enable typographical apostrophe.
{"en-CA", "-6-1"},
{"en-US", "-6-1"},
};
// Generate the bdict file name using default version string or special
// version string, depending on the language.
std::string language = GetSpellCheckLanguageRegion(input_language);
std::string versioned_bdict_file_name(language + kDefaultVersionString +
".bdic");
for (size_t i = 0; i < arraysize(special_version_string); ++i) {
if (language == special_version_string[i].language) {
versioned_bdict_file_name =
language + special_version_string[i].version + ".bdic";
break;
}
}
return dict_dir.AppendASCII(versioned_bdict_file_name);
}
std::string GetCorrespondingSpellCheckLanguage(const std::string& language) {
// Look for exact match in the Spell Check language list.
for (size_t i = 0; i < arraysize(g_supported_spellchecker_languages);
++i) {
// First look for exact match in the language region of the list.
std::string spellcheck_language(
g_supported_spellchecker_languages[i].language);
if (spellcheck_language == language)
return language;
// Next, look for exact match in the language_region part of the list.
std::string spellcheck_language_region(
g_supported_spellchecker_languages[i].language_region);
if (spellcheck_language_region == language)
return g_supported_spellchecker_languages[i].language;
}
// No match found - return blank.
return std::string();
}
void SpellCheckLanguages(std::vector<std::string>* languages) {
for (size_t i = 0; i < arraysize(g_supported_spellchecker_languages);
++i) {
languages->push_back(g_supported_spellchecker_languages[i].language);
}
}
void GetISOLanguageCountryCodeFromLocale(const std::string& locale,
std::string* language_code,
std::string* country_code) {
DCHECK(language_code);
DCHECK(country_code);
char language[ULOC_LANG_CAPACITY] = ULOC_ENGLISH;
const char* country = "USA";
if (!locale.empty()) {
UErrorCode error = U_ZERO_ERROR;
char id[ULOC_LANG_CAPACITY + ULOC_SCRIPT_CAPACITY + ULOC_COUNTRY_CAPACITY];
uloc_addLikelySubtags(locale.c_str(), id, arraysize(id), &error);
error = U_ZERO_ERROR;
uloc_getLanguage(id, language, arraysize(language), &error);
country = uloc_getISO3Country(id);
}
*language_code = std::string(language);
*country_code = std::string(country);
}
bool IsMultilingualSpellcheckEnabled() {
// TODO(rouslan): Remove field trial and command line flags when M49 is
// stable.
const std::string& group_name =
base::FieldTrialList::FindFullName(kMultilingualSpellcheckFieldTrial);
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableMultilingualSpellChecker)) {
return false;
}
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableMultilingualSpellChecker)) {
return true;
}
// Enabled by default, but can be disabled in field trial.
return !base::StartsWith(group_name, "Disabled",
base::CompareCase::INSENSITIVE_ASCII);
}
} // namespace spellcheck_common
} // namespace chrome
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