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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.
#ifndef COMPONENTS_LANGUAGE_CORE_BROWSER_LANGUAGE_PREFS_H_
#define COMPONENTS_LANGUAGE_CORE_BROWSER_LANGUAGE_PREFS_H_
#include <set>
#include <string>
#include <string_view>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "components/prefs/pref_change_registrar.h"
class PrefService;
namespace base {
class Value;
} // namespace base
namespace user_prefs {
class PrefRegistrySyncable;
}
class PrefService;
namespace language {
extern const char kFallbackInputMethodLocale[];
class LanguagePrefs {
public:
static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
explicit LanguagePrefs(PrefService* user_prefs);
LanguagePrefs(const LanguagePrefs&) = delete;
LanguagePrefs& operator=(const LanguagePrefs&) = delete;
~LanguagePrefs();
// Gets the language settings list containing combination of policy-forced and
// user-selected languages. Language settings list follows the Chrome internal
// format.
void GetAcceptLanguagesList(std::vector<std::string>* languages) const;
// Gets the user-selected language settings list. Languages are expected to be
// in the Chrome internal format.
void GetUserSelectedLanguagesList(std::vector<std::string>* languages) const;
// Updates the user-selected language settings list. Languages are expected to
// be in the Chrome internal format.
void SetUserSelectedLanguagesList(const std::vector<std::string>& languages);
// Returns true if the target language is forced through policy.
bool IsForcedLanguage(const std::string& language);
#if BUILDFLAG(IS_ANDROID)
// Get the ULP languages from a preference. This is an unfiltered list of
// languages and may contain country specific language locales. If you do not
// need specific locals always compare base languages from the list.
std::vector<std::string> GetULPLanguages();
// Clear the previous ULP language pref and set to the new list of languages.
void SetULPLanguages(std::vector<std::string> ulp_languages);
#endif
private:
// Updates the language list containing combination of policy-forced and
// user-selected languages.
void GetDeduplicatedUserLanguages(std::string* deduplicated_languages_string);
// Updates the pref corresponding to the language list containing combination
// of policy-forced and user-selected languages.
// Since languages may be removed from the policy while the browser is off,
// having an additional policy solely for user-selected languages allows
// Chrome to clear any removed policy languages from the accept languages pref
// while retaining all user-selected languages.
void UpdateAcceptLanguagesPref();
// Initializes the user selected language pref to ensure backwards
// compatibility.
void InitializeSelectedLanguagesPref();
// Used for deduplication and reordering of languages.
std::set<std::string> forced_languages_set_;
raw_ptr<PrefService> prefs_; // Weak.
PrefChangeRegistrar pref_change_registrar_;
};
void ResetLanguagePrefs(PrefService* prefs);
// Given a comma separated list of locales, return the first.
std::string GetFirstLanguage(std::string_view language_list);
} // namespace language
#endif // COMPONENTS_LANGUAGE_CORE_BROWSER_LANGUAGE_PREFS_H_
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