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language_util_linux.cc
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37 lines (28 loc) · 1.25 KB
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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 <glib.h>
#include "base/check.h"
#include "base/i18n/rtl.h"
namespace electron {
std::vector<std::string> GetPreferredLanguages() {
std::vector<std::string> preferredLanguages;
// Based on
// https://source.chromium.org/chromium/chromium/src/+/refs/tags/108.0.5329.0:ui/base/l10n/l10n_util.cc;l=543-554
// GLib implements correct environment variable parsing with
// the precedence order: LANGUAGE, LC_ALL, LC_MESSAGES and LANG.
const char* const* languages = g_get_language_names();
DCHECK(languages); // A valid pointer is guaranteed.
DCHECK(*languages); // At least one entry, "C", is guaranteed.
// SAFETY: |g_get_language_names()| returns a glib-owned array
// of const C strings, terminated by an empty string.
// This loop is the correct way to walk through its return values.
static constexpr std::string_view CLangName = "C";
for (; *languages; UNSAFE_BUFFERS(++languages)) {
if (CLangName != *languages)
preferredLanguages.push_back(base::i18n::GetCanonicalLocale(*languages));
}
return preferredLanguages;
}
} // namespace electron