electron/shell/common/language_util_win.cc

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// Copyright (c) 2020 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/common/language_util.h"
#include <roapi.h>
#include <windows.system.userprofile.h>
#include <wrl.h>
#include "base/strings/sys_string_conversions.h"
#include "base/win/core_winrt_util.h"
#include "base/win/i18n.h"
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
namespace electron {
std::vector<std::string> GetPreferredLanguages() {
std::vector<std::u16string> languages16;
// Attempt to use API available on Windows 10 or later, which
// returns the full list of language preferences.
if (!GetPreferredLanguagesUsingGlobalization(&languages16)) {
base::win::i18n::GetThreadPreferredUILanguageList(&languages16);
}
std::vector<std::string> languages;
for (const auto& language : languages16) {
languages.push_back(base::SysWideToUTF8(language));
}
return languages;
}
bool GetPreferredLanguagesUsingGlobalization(
std::vector<std::u16string>* languages) {
if (base::win::GetVersion() < base::win::Version::WIN10)
return false;
if (!base::win::ResolveCoreWinRTDelayload() ||
!base::win::ScopedHString::ResolveCoreWinRTStringDelayload())
return false;
base::win::ScopedHString guid = base::win::ScopedHString::Create(
RuntimeClass_Windows_System_UserProfile_GlobalizationPreferences);
Microsoft::WRL::ComPtr<
ABI::Windows::System::UserProfile::IGlobalizationPreferencesStatics>
prefs;
HRESULT hr =
base::win::RoGetActivationFactory(guid.get(), IID_PPV_ARGS(&prefs));
if (FAILED(hr))
return false;
ABI::Windows::Foundation::Collections::IVectorView<HSTRING>* langs;
hr = prefs->get_Languages(&langs);
if (FAILED(hr))
return false;
unsigned size;
hr = langs->get_Size(&size);
if (FAILED(hr))
return false;
for (unsigned i = 0; i < size; ++i) {
HSTRING hstr;
hr = langs->GetAt(i, &hstr);
if (SUCCEEDED(hr)) {
base::WStringPiece str = base::win::ScopedHString(hstr).Get();
languages->emplace_back(str.data(), str.size());
}
}
return true;
}
} // namespace electron