| // Copyright (c) 2010 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 "base/win/i18n.h" |
| |
| #include <windows.h> |
| |
| #include "base/logging.h" |
| #include "base/strings/string_split.h" |
| #include "base/strings/string_util.h" |
| |
| namespace { |
| |
| typedef decltype(::GetSystemPreferredUILanguages)* GetPreferredUILanguages_Fn; |
| |
| bool GetPreferredUILanguageList(GetPreferredUILanguages_Fn function, |
| ULONG flags, |
| std::vector<std::wstring>* languages) { |
| DCHECK_EQ((flags & (MUI_LANGUAGE_ID | MUI_LANGUAGE_NAME)), 0U); |
| const ULONG call_flags = flags | MUI_LANGUAGE_NAME; |
| ULONG language_count = 0; |
| ULONG buffer_length = 0; |
| if (!function(call_flags, &language_count, nullptr, &buffer_length) || |
| !buffer_length) { |
| DPCHECK(!buffer_length) << "Failed getting size of preferred UI languages."; |
| return false; |
| } |
| |
| std::wstring buffer(buffer_length, '\0'); |
| if (!function(call_flags, &language_count, base::data(buffer), |
| &buffer_length) || |
| !language_count) { |
| DPCHECK(!language_count) << "Failed getting preferred UI languages."; |
| return false; |
| } |
| |
| languages->clear(); |
| // Split string on NUL characters. |
| for (const auto& token : base::SplitStringPiece( |
| base::AsStringPiece16(buffer), base::string16(1, '\0'), |
| base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY)) { |
| languages->push_back(base::AsWString(token)); |
| } |
| DCHECK_EQ(languages->size(), language_count); |
| return true; |
| } |
| |
| } // namespace |
| |
| namespace base { |
| namespace win { |
| namespace i18n { |
| |
| bool GetUserPreferredUILanguageList(std::vector<std::wstring>* languages) { |
| DCHECK(languages); |
| return GetPreferredUILanguageList(::GetUserPreferredUILanguages, 0, |
| languages); |
| } |
| |
| bool GetThreadPreferredUILanguageList(std::vector<std::wstring>* languages) { |
| DCHECK(languages); |
| return GetPreferredUILanguageList( |
| ::GetThreadPreferredUILanguages, |
| MUI_MERGE_SYSTEM_FALLBACK | MUI_MERGE_USER_FALLBACK, languages); |
| } |
| |
| } // namespace i18n |
| } // namespace win |
| } // namespace base |