win32 shell 파일 복원 로직.

윈도우 shellapi.h 에서 지운 파일을 복원하는 API가 없습니다.

구현방법은 다음과 같습니다.

윈도우 휴지통의 모든 파일을 검색해 최근 삭제한 파일, 폴더를 복원합니다.

#include <windows.h>

#include <shlobj.h>

#include <shlwapi.h>

#include <propkey.h>

#include <propvarutil.h>

#include <iostream>

#include <string>

#include <wrl/client.h>

#pragma comment(lib, "shell32.lib")

#pragma comment(lib, "ole32.lib")

#pragma comment(lib, "propsys.lib")

static HRESULT GetFileTimeProp(IShellItem2* item2, const PROPERTYKEY& key, FILETIME& outFt)

{

    outFt = {};

    PROPVARIANT pv; PropVariantInit(&pv);

    HRESULT hr = item2->GetProperty(key, &pv);

    if (FAILED(hr)) { PropVariantClear(&pv); return hr; }

    if (pv.vt == VT_FILETIME) { outFt = pv.filetime; PropVariantClear(&pv); return S_OK; }

    if (pv.vt == VT_DATE)

    {

        SYSTEMTIME st{};

        if (VariantTimeToSystemTime(pv.date, &st) && SystemTimeToFileTime(&st, &outFt))

        {

            PropVariantClear(&pv); return S_OK;

        }

    }

    PropVariantClear(&pv);

    return E_FAIL;

}

static HRESULT InvokeUndelete(IShellItem* item, HWND hwndOwner)

{

    ComPtr<IContextMenu> cm;

    HRESULT hr = item->BindToHandler(nullptr, BHID_SFUIObject, IID_PPV_ARGS(&cm));

    if (FAILED(hr)) return hr;

    HMENU h = CreatePopupMenu();

    if (!h) return HRESULT_FROM_WIN32(GetLastError());

    cm->QueryContextMenu(h, 0, 1, 0x7FFF, CMF_NORMAL);

    CMINVOKECOMMANDINFOEX info{};

    info.cbSize = sizeof(info);

    info.fMask = CMIC_MASK_UNICODE;

    info.hwnd = hwndOwner;

    info.lpVerb = "undelete";

    info.lpVerbW = L"undelete";

    info.nShow = SW_SHOWNORMAL;

    hr = cm->InvokeCommand(reinterpret_cast<LPCMINVOKECOMMANDINFO>(&info));

    DestroyMenu(h);

    return hr;

}

HRESULT RestoreMostRecentFromRecycleBin(HWND hwndOwner /*=nullptr*/)

{

    // STA 권장

    HRESULT hr = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);

    if (FAILED(hr) && hr != RPC_E_CHANGED_MODE) return hr;

    auto uninit = uninit = (hr == S_OK || hr == S_FALSE);

    HRESULT result = E_FAIL;

    ComPtr<IShellItem> rb;

    hr = SHGetKnownFolderItem(FOLDERID_RecycleBinFolder, KF_FLAG_DEFAULT, nullptr, IID_PPV_ARGS(&rb));

    if (FAILED(hr)) { result = hr; if (uninit) CoUninitialize(); return result; }

    ComPtr<IEnumShellItems> e;

    hr = rb->BindToHandler(nullptr, BHID_EnumItems, IID_PPV_ARGS(&e));

    if (FAILED(hr)) { result = hr; if (uninit) CoUninitialize(); return result; }

    PROPERTYKEY keyDateDeleted{};

    hr = PSGetPropertyKeyFromName(L"System.Recycle.DateDeleted", &keyDateDeleted);

    if (FAILED(hr)) { result = hr; if (uninit) CoUninitialize(); return result; }

    ComPtr<IShellItem> best;

    FILETIME bestFt{};

    bool haveBest = false;

    while (true)

    {

        ComPtr<IShellItem> item;

        ULONG fetched = 0;

        HRESULT hrNext = e->Next(1, &item, &fetched);

        if (hrNext != S_OK) break;

        ComPtr<IShellItem2> item2;

        if (FAILED(item.As(&item2)) || !item2) continue;

        FILETIME ft{};

        if (FAILED(GetFileTimeProp(item2.Get(), keyDateDeleted, ft))) continue;

        if (!haveBest || CompareFileTime(&ft, &bestFt) > 0)

        {

            best = item;

            bestFt = ft;

            haveBest = true;

        }

    }

    if (!best) { result = HRESULT_FROM_WIN32(ERROR_NOT_FOUND); goto done; }

    result = InvokeUndelete(best.Get(), hwndOwner);

done:

    if (uninit) CoUninitialize();

    return result;

}

- 참고.

https://devblogs.microsoft.com/oldnewthing/20110901-00/?p=9753

https://stackoverflow.com/questions/78010977/how-to-programatically-restore-a-recycle-bin-item

https://microsoft.public.platformsdk.shell.narkive.com/eWwGSZ1d/undoing-a-delete-after-shfileoperation-with-the-fof-allowundo-flag