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// Copyright 2014 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 "components/translate/core/browser/translate_accept_languages.h"
#include "base/bind.h"
#include "base/prefs/pref_service.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "components/translate/core/browser/translate_download_manager.h"
#include "components/translate/core/common/translate_util.h"
#include "ui/base/l10n/l10n_util.h"
namespace translate {
TranslateAcceptLanguages::TranslateAcceptLanguages(
PrefService* prefs,
const char* accept_languages_pref)
: accept_languages_pref_(accept_languages_pref) {
InitAcceptLanguages(prefs);
// Also start listening for changes in the accept languages.
pref_change_registrar_.Init(prefs);
pref_change_registrar_.Add(
accept_languages_pref,
base::Bind(&TranslateAcceptLanguages::InitAcceptLanguages,
base::Unretained(this),
prefs));
}
TranslateAcceptLanguages::~TranslateAcceptLanguages() {
}
// static
bool TranslateAcceptLanguages::CanBeAcceptLanguage(
const std::string& language) {
std::string accept_language = language;
translate::ToChromeLanguageSynonym(&accept_language);
const std::string locale =
TranslateDownloadManager::GetInstance()->application_locale();
std::vector<std::string> accept_language_codes;
l10n_util::GetAcceptLanguagesForLocale(locale, &accept_language_codes);
if (std::find(accept_language_codes.begin(),
accept_language_codes.end(),
accept_language) != accept_language_codes.end()) {
return true;
}
return false;
}
bool TranslateAcceptLanguages::IsAcceptLanguage(const std::string& language) {
std::string accept_language = language;
translate::ToChromeLanguageSynonym(&accept_language);
return accept_languages_.find(accept_language) != accept_languages_.end();
}
void TranslateAcceptLanguages::InitAcceptLanguages(PrefService* prefs) {
DCHECK(prefs);
// Build the languages.
accept_languages_.clear();
std::string accept_langs_str = prefs->GetString(
accept_languages_pref_.c_str());
std::vector<std::string> accept_langs_list;
base::SplitString(accept_langs_str, ',', &accept_langs_list);
std::vector<std::string>::const_iterator iter;
for (iter = accept_langs_list.begin();
iter != accept_langs_list.end(); ++iter) {
// Get rid of the locale extension if any (ex: en-US -> en), but for Chinese
// for which the CLD reports zh-CN and zh-TW.
std::string accept_lang(*iter);
size_t index = iter->find("-");
if (index != std::string::npos && *iter != "zh-CN" && *iter != "zh-TW")
accept_lang = iter->substr(0, index);
accept_languages_.insert(accept_lang);
}
}
} // namespace translate
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