| // Copyright 2013 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/browser/chromeos/base/locale_util.h" |
| |
| #include <utility> |
| #include <vector> |
| |
| #include "base/task_scheduler/post_task.h" |
| #include "chrome/browser/browser_process.h" |
| #include "chrome/browser/chromeos/login/session/user_session_manager.h" |
| #include "chrome/browser/profiles/profile.h" |
| #include "chrome/common/pref_names.h" |
| #include "components/prefs/pref_service.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "ui/base/ime/chromeos/input_method_manager.h" |
| #include "ui/base/ime/chromeos/input_method_util.h" |
| #include "ui/base/l10n/l10n_util.h" |
| #include "ui/base/resource/resource_bundle.h" |
| #include "ui/gfx/platform_font_linux.h" |
| |
| namespace chromeos { |
| |
| namespace { |
| |
| struct SwitchLanguageData { |
| SwitchLanguageData(const std::string& locale, |
| const bool enable_locale_keyboard_layouts, |
| const bool login_layouts_only, |
| const locale_util::SwitchLanguageCallback& callback, |
| Profile* profile) |
| : callback(callback), |
| result(locale, std::string(), false), |
| enable_locale_keyboard_layouts(enable_locale_keyboard_layouts), |
| login_layouts_only(login_layouts_only), |
| profile(profile) {} |
| |
| const locale_util::SwitchLanguageCallback callback; |
| |
| locale_util::LanguageSwitchResult result; |
| const bool enable_locale_keyboard_layouts; |
| const bool login_layouts_only; |
| Profile* profile; |
| }; |
| |
| // Runs on SequencedWorkerPool thread under PostTaskAndReply(). |
| // So data is owned by "Reply" part of PostTaskAndReply() process. |
| void SwitchLanguageDoReloadLocale(SwitchLanguageData* data) { |
| DCHECK(!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); |
| |
| data->result.loaded_locale = |
| ui::ResourceBundle::GetSharedInstance().ReloadLocaleResources( |
| data->result.requested_locale); |
| |
| data->result.success = !data->result.loaded_locale.empty(); |
| } |
| |
| // Callback after SwitchLanguageDoReloadLocale() back in UI thread. |
| void FinishSwitchLanguage(std::unique_ptr<SwitchLanguageData> data) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| if (data->result.success) { |
| g_browser_process->SetApplicationLocale(data->result.loaded_locale); |
| |
| // If the language switch was triggered by enterprise policy, it is possible |
| // that the locale is not in the user's list of preferred languages yet, |
| // which would lead to an inconsistent state in the settings UI. Make sure |
| // to add it in that case. |
| locale_util::AddLocaleToPreferredLanguages(data->result.loaded_locale, |
| data->profile->GetPrefs()); |
| |
| if (data->enable_locale_keyboard_layouts) { |
| input_method::InputMethodManager* manager = |
| input_method::InputMethodManager::Get(); |
| scoped_refptr<input_method::InputMethodManager::State> ime_state = |
| UserSessionManager::GetInstance()->GetDefaultIMEState(data->profile); |
| if (data->login_layouts_only) { |
| // Enable the hardware keyboard layouts and locale-specific layouts |
| // suitable for use on the login screen. This will also switch to the |
| // first hardware keyboard layout since the input method currently in |
| // use may not be supported by the new locale. |
| ime_state->EnableLoginLayouts( |
| data->result.loaded_locale, |
| manager->GetInputMethodUtil()->GetHardwareLoginInputMethodIds()); |
| } else { |
| // Enable all hardware keyboard layouts. This will also switch to the |
| // first hardware keyboard layout. |
| ime_state->ReplaceEnabledInputMethods( |
| manager->GetInputMethodUtil()->GetHardwareInputMethodIds()); |
| |
| // Enable all locale-specific layouts. |
| std::vector<std::string> input_methods; |
| manager->GetInputMethodUtil()->GetInputMethodIdsFromLanguageCode( |
| data->result.loaded_locale, |
| input_method::kKeyboardLayoutsOnly, |
| &input_methods); |
| for (std::vector<std::string>::const_iterator it = |
| input_methods.begin(); it != input_methods.end(); ++it) { |
| ime_state->EnableInputMethod(*it); |
| } |
| } |
| } |
| } |
| |
| // The font clean up of ResourceBundle should be done on UI thread, since the |
| // cached fonts are thread unsafe. |
| ui::ResourceBundle::GetSharedInstance().ReloadFonts(); |
| gfx::PlatformFontLinux::ReloadDefaultFont(); |
| if (!data->callback.is_null()) |
| data->callback.Run(data->result); |
| } |
| |
| } // namespace |
| |
| namespace locale_util { |
| |
| constexpr const char* kAllowedUILocalesFallbackLocale = "en-US"; |
| |
| LanguageSwitchResult::LanguageSwitchResult(const std::string& requested_locale, |
| const std::string& loaded_locale, |
| bool success) |
| : requested_locale(requested_locale), |
| loaded_locale(loaded_locale), |
| success(success) { |
| } |
| |
| void SwitchLanguage(const std::string& locale, |
| const bool enable_locale_keyboard_layouts, |
| const bool login_layouts_only, |
| const SwitchLanguageCallback& callback, |
| Profile* profile) { |
| DCHECK_CURRENTLY_ON(content::BrowserThread::UI); |
| std::unique_ptr<SwitchLanguageData> data( |
| new SwitchLanguageData(locale, enable_locale_keyboard_layouts, |
| login_layouts_only, callback, profile)); |
| base::Closure reloader( |
| base::Bind(&SwitchLanguageDoReloadLocale, base::Unretained(data.get()))); |
| base::PostTaskWithTraitsAndReply( |
| FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT}, reloader, |
| base::Bind(&FinishSwitchLanguage, base::Passed(std::move(data)))); |
| } |
| |
| bool IsAllowedUILocale(const std::string& locale, const PrefService* prefs) { |
| const base::Value::ListStorage& allowed_ui_locales = |
| prefs->GetList(prefs::kAllowedUILocales)->GetList(); |
| |
| // Empty list means all locales are allowed. |
| if (allowed_ui_locales.empty()) |
| return true; |
| |
| // Only locale codes with native UI support can be allowed. |
| if (!IsNativeUILocale(locale)) |
| return false; |
| |
| // Check if locale is in list of allowed UI locales. |
| return base::ContainsValue(allowed_ui_locales, base::Value(locale)); |
| } |
| |
| bool IsNativeUILocale(const std::string& locale) { |
| std::string resolved_locale; |
| if (l10n_util::CheckAndResolveLocale(locale, &resolved_locale) && |
| locale == resolved_locale) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| std::string GetAllowedFallbackUILocale(const PrefService* prefs) { |
| // Check the user's preferred languages if one of them is an allowed UI |
| // locale. |
| std::string preferred_languages_string = |
| prefs->GetString(prefs::kLanguagePreferredLanguages); |
| std::vector<std::string> preferred_languages = |
| base::SplitString(preferred_languages_string, ",", base::TRIM_WHITESPACE, |
| base::SPLIT_WANT_NONEMPTY); |
| for (const std::string& language : preferred_languages) { |
| if (IsAllowedUILocale(language, prefs)) |
| return language; |
| } |
| |
| // Check the allowed UI locales and return the first valid entry. |
| const base::Value::ListStorage& allowed_ui_locales = |
| prefs->GetList(prefs::kAllowedUILocales)->GetList(); |
| for (const base::Value& value : allowed_ui_locales) { |
| const std::string& locale = value.GetString(); |
| if (IsAllowedUILocale(locale, prefs)) |
| return locale; |
| } |
| |
| // default fallback |
| return kAllowedUILocalesFallbackLocale; |
| } |
| |
| bool AddLocaleToPreferredLanguages(const std::string& locale, |
| PrefService* prefs) { |
| std::string preferred_languages_string = |
| prefs->GetString(prefs::kLanguagePreferredLanguages); |
| std::vector<std::string> preferred_languages = |
| base::SplitString(preferred_languages_string, ",", base::TRIM_WHITESPACE, |
| base::SPLIT_WANT_NONEMPTY); |
| if (!base::ContainsValue(preferred_languages, locale)) { |
| preferred_languages.push_back(locale); |
| prefs->SetString(prefs::kLanguagePreferredLanguages, |
| base::JoinString(preferred_languages, ",")); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| } // namespace locale_util |
| } // namespace chromeos |