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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/language/core/browser/language_prefs.h"
#include <algorithm>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
#include "base/strings/strcat.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "build/build_config.h"
#include "components/language/core/browser/pref_names.h"
#include "components/language/core/common/language_util.h"
#include "components/language/core/common/locale_util.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "components/strings/grit/components_locale_settings.h"
#include "ui/base/l10n/l10n_util.h"
namespace language {
const char kFallbackInputMethodLocale[] = "en-US";
void LanguagePrefs::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
registry->RegisterStringPref(language::prefs::kAcceptLanguages,
l10n_util::GetStringUTF8(IDS_ACCEPT_LANGUAGES),
user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
registry->RegisterStringPref(language::prefs::kSelectedLanguages,
std::string(),
user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
registry->RegisterListPref(language::prefs::kForcedLanguages);
#if BUILDFLAG(IS_CHROMEOS)
registry->RegisterStringPref(language::prefs::kPreferredLanguages,
kFallbackInputMethodLocale);
registry->RegisterStringPref(
language::prefs::kPreferredLanguagesSyncable, "",
user_prefs::PrefRegistrySyncable::SYNCABLE_OS_PREF);
#endif
#if BUILDFLAG(IS_ANDROID)
registry->RegisterBooleanPref(
language::prefs::kAppLanguagePromptShown, false,
user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
registry->RegisterListPref(language::prefs::kULPLanguages);
#endif
}
LanguagePrefs::LanguagePrefs(PrefService* user_prefs) : prefs_(user_prefs) {
InitializeSelectedLanguagesPref();
UpdateAcceptLanguagesPref();
base::RepeatingClosure callback = base::BindRepeating(
&LanguagePrefs::UpdateAcceptLanguagesPref, base::Unretained(this));
pref_change_registrar_.Init(prefs_);
pref_change_registrar_.Add(language::prefs::kForcedLanguages, callback);
pref_change_registrar_.Add(language::prefs::kSelectedLanguages, callback);
}
LanguagePrefs::~LanguagePrefs() {
pref_change_registrar_.RemoveAll();
}
void LanguagePrefs::GetAcceptLanguagesList(
std::vector<std::string>* languages) const {
DCHECK(languages);
DCHECK(languages->empty());
#if BUILDFLAG(IS_CHROMEOS)
const std::string& key = language::prefs::kPreferredLanguages;
#else
const std::string& key = language::prefs::kAcceptLanguages;
#endif
*languages = base::SplitString(prefs_->GetString(key), ",",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
}
void LanguagePrefs::GetUserSelectedLanguagesList(
std::vector<std::string>* languages) const {
DCHECK(languages);
DCHECK(languages->empty());
const std::string& key = language::prefs::kSelectedLanguages;
*languages = base::SplitString(prefs_->GetString(key), ",",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
}
void LanguagePrefs::SetUserSelectedLanguagesList(
const std::vector<std::string>& languages) {
std::vector<std::string> filtered_languages =
l10n_util::KeepAcceptedLanguages(languages);
std::string languages_str = base::JoinString(filtered_languages, ",");
prefs_->SetString(language::prefs::kSelectedLanguages, languages_str);
#if BUILDFLAG(IS_CHROMEOS)
prefs_->SetString(language::prefs::kPreferredLanguages, languages_str);
#endif
}
void LanguagePrefs::GetDeduplicatedUserLanguages(
std::string* deduplicated_languages_string) {
std::vector<std::string> deduplicated_languages;
forced_languages_set_.clear();
// Add policy languages.
for (const auto& language :
prefs_->GetList(language::prefs::kForcedLanguages)) {
if (forced_languages_set_.find(language.GetString()) ==
forced_languages_set_.end()) {
deduplicated_languages.emplace_back(language.GetString());
forced_languages_set_.insert(language.GetString());
}
}
// Add non-duplicate user-selected languages.
for (auto& language :
base::SplitString(prefs_->GetString(language::prefs::kSelectedLanguages),
",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
if (forced_languages_set_.find(language) == forced_languages_set_.end())
deduplicated_languages.emplace_back(std::move(language));
}
*deduplicated_languages_string =
base::JoinString(deduplicated_languages, ",");
}
void LanguagePrefs::UpdateAcceptLanguagesPref() {
std::string deduplicated_languages_string;
GetDeduplicatedUserLanguages(&deduplicated_languages_string);
if (deduplicated_languages_string !=
prefs_->GetString(language::prefs::kAcceptLanguages))
prefs_->SetString(language::prefs::kAcceptLanguages,
deduplicated_languages_string);
}
#if BUILDFLAG(IS_ANDROID)
std::vector<std::string> LanguagePrefs::GetULPLanguages() {
std::vector<std::string> ulp_languages;
for (const auto& language : prefs_->GetList(language::prefs::kULPLanguages)) {
ulp_languages.push_back(language.GetString());
}
return ulp_languages;
}
void LanguagePrefs::SetULPLanguages(std::vector<std::string> ulp_languages) {
base::Value::List ulp_pref_list;
ulp_pref_list.reserve(ulp_languages.size());
for (const auto& language : ulp_languages) {
ulp_pref_list.Append(language);
}
prefs_->SetList(language::prefs::kULPLanguages, std::move(ulp_pref_list));
}
#endif
bool LanguagePrefs::IsForcedLanguage(const std::string& language) {
return forced_languages_set_.find(language) != forced_languages_set_.end();
}
void LanguagePrefs::InitializeSelectedLanguagesPref() {
// Initializes user-selected languages if they're empty.
// This is important so that previously saved languages aren't overwritten.
if (prefs_->GetString(language::prefs::kSelectedLanguages).empty()) {
prefs_->SetString(language::prefs::kSelectedLanguages,
prefs_->GetString(language::prefs::kAcceptLanguages));
}
}
void ResetLanguagePrefs(PrefService* prefs) {
prefs->ClearPref(language::prefs::kSelectedLanguages);
prefs->ClearPref(language::prefs::kAcceptLanguages);
#if BUILDFLAG(IS_CHROMEOS)
prefs->ClearPref(language::prefs::kPreferredLanguages);
prefs->ClearPref(language::prefs::kPreferredLanguagesSyncable);
#endif
#if BUILDFLAG(IS_ANDROID)
prefs->ClearPref(language::prefs::kULPLanguages);
#endif
}
std::string GetFirstLanguage(std::string_view language_list) {
auto end = language_list.find(",");
return std::string(language_list.substr(0, end));
}
} // namespace language
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