shlobj_core.hpp

// Copyright Take Vos 2023.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "../win32_headers.hpp"
#include "hresult_error_intf.hpp"
#include <expected>
#include <string>
#include <system_error>
#include <filesystem>
 
hi_export_module(hikogui.win32 : shlobj_core);
 
hi_export namespace hi {
inline namespace v1 {
 
[[nodiscard]] inline std::expected<std::filesystem::path, hresult_error> win32_SHGetKnownFolderPath(KNOWNFOLDERID const& folder_id) noexcept
{
    PWSTR wpath = nullptr;
    auto const result_code = SHGetKnownFolderPath(folder_id, 0, nullptr, &wpath);
 
    if (result_code != S_OK) {
        return std::unexpected{static_cast<hresult_error>(result_code)};
    }
 
    auto r = std::filesystem::path{wpath} / "";
    CoTaskMemFree(wpath);
    return r;
}
 
} // namespace v1
}