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104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
/*
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* PROJECT: shell32
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* LICENSE: LGPL-2.1-or-later (https://spdx.org/licenses/LGPL-2.1-or-later)
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* PURPOSE: SHGetAttributesFromDataObject implementation
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* COPYRIGHT: Copyright 2021 Mark Jansen <mark.jansen@reactos.org>
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*/
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#include "precomp.h"
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WINE_DEFAULT_DEBUG_CHANNEL(shell);
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static CLIPFORMAT g_DataObjectAttributes = 0;
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static const DWORD dwDefaultAttributeMask = SFGAO_CANCOPY | SFGAO_CANMOVE | SFGAO_STORAGE | SFGAO_CANRENAME |
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SFGAO_CANDELETE | SFGAO_READONLY | SFGAO_STREAM | SFGAO_FOLDER;
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struct DataObjectAttributes
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{
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DWORD dwMask;
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DWORD dwAttributes;
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UINT cItems;
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};
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static_assert(sizeof(DataObjectAttributes) == 0xc, "Unexpected struct size!");
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static
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HRESULT _BindToObject(PCUIDLIST_ABSOLUTE pidl, CComPtr<IShellFolder>& spFolder)
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{
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CComPtr<IShellFolder> spDesktop;
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HRESULT hr = SHGetDesktopFolder(&spDesktop);
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if (FAILED(hr))
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return hr;
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return spDesktop->BindToObject(pidl, NULL, IID_PPV_ARG(IShellFolder, &spFolder));
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}
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EXTERN_C
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HRESULT WINAPI SHGetAttributesFromDataObject(IDataObject* pDataObject, DWORD dwAttributeMask, DWORD* pdwAttributes, UINT* pcItems)
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{
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DWORD dwAttributes = 0;
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DWORD cItems = 0;
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HRESULT hr = S_OK;
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TRACE("(%p, 0x%x, %p, %p)\n", pDataObject, dwAttributeMask, pdwAttributes, pcItems);
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if (!g_DataObjectAttributes)
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g_DataObjectAttributes = (CLIPFORMAT)RegisterClipboardFormatW(L"DataObjectAttributes");
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if (pDataObject)
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{
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DataObjectAttributes data = {};
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if (FAILED(DataObject_GetData(pDataObject, g_DataObjectAttributes, &data, sizeof(data))))
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{
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TRACE("No attributes yet, creating new\n");
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memset(&data, 0, sizeof(data));
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}
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DWORD dwQueryAttributes = dwAttributeMask | dwDefaultAttributeMask;
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if ((data.dwMask & dwQueryAttributes) != dwQueryAttributes)
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{
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CDataObjectHIDA hida(pDataObject);
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CComPtr<IShellFolder> spFolder;
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if (!FAILED_UNEXPECTEDLY(hr = hida.hr()) &&
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!FAILED_UNEXPECTEDLY(hr = _BindToObject(HIDA_GetPIDLFolder(hida), spFolder)))
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{
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CSimpleArray<PCUIDLIST_RELATIVE> apidl;
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for (UINT n = 0; n < hida->cidl; ++n)
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{
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apidl.Add(HIDA_GetPIDLItem(hida, n));
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}
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SFGAOF rgfInOut = dwQueryAttributes;
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hr = spFolder->GetAttributesOf(apidl.GetSize(), apidl.GetData(), &rgfInOut);
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if (!FAILED_UNEXPECTEDLY(hr))
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{
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data.dwMask = dwQueryAttributes;
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// Only store what we asked for
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data.dwAttributes = rgfInOut & dwQueryAttributes;
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data.cItems = apidl.GetSize();
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hr = DataObject_SetData(pDataObject, g_DataObjectAttributes, &data, sizeof(data));
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FAILED_UNEXPECTEDLY(hr);
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}
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}
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}
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// Only give the user what they asked for, not everything else we have!
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dwAttributes = data.dwAttributes & dwAttributeMask;
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cItems = data.cItems;
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}
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if (pdwAttributes)
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*pdwAttributes = dwAttributes;
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if (pcItems)
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*pcItems = cItems;
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return hr;
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}
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