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![William Kent](/assets/img/avatar_default.png)
* [SHELL32] Release DROPFILES structures * [SHELL32] Release the STGMEDIUM when returning on error
186 lines
6 KiB
C++
186 lines
6 KiB
C++
/*
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* Trash virtual folder support. The trashing engine is implemented in trash.c
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*
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* Copyright (C) 2006 Mikolaj Zalewski
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* Copyright (C) 2009 Andrew Hill
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* Copyright (C) 2017 Giannis Adamopoulos
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <precomp.h>
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WINE_DEFAULT_DEBUG_CHANNEL (shell);
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class CRecyclerDropTarget :
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public CComObjectRootEx<CComMultiThreadModelNoCS>,
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public IDropTarget
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{
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private:
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BOOL fAcceptFmt; /* flag for pending Drop */
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UINT cfShellIDList;
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static HRESULT _DoDeleteDataObject(IDataObject *pda, DWORD fMask)
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{
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HRESULT hr;
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STGMEDIUM medium;
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FORMATETC formatetc;
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InitFormatEtc (formatetc, CF_HDROP, TYMED_HGLOBAL);
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hr = pda->GetData(&formatetc, &medium);
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if (FAILED_UNEXPECTEDLY(hr))
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return hr;
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LPDROPFILES lpdf = (LPDROPFILES) GlobalLock(medium.hGlobal);
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if (!lpdf)
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{
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ERR("Error locking global\n");
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ReleaseStgMedium(&medium);
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return E_FAIL;
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}
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/* Delete them */
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SHFILEOPSTRUCTW FileOp;
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ZeroMemory(&FileOp, sizeof(FileOp));
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FileOp.wFunc = FO_DELETE;
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FileOp.pFrom = (LPWSTR) (((byte*) lpdf) + lpdf->pFiles);;
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if ((fMask & CMIC_MASK_SHIFT_DOWN) == 0)
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FileOp.fFlags = FOF_ALLOWUNDO;
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TRACE("Deleting file (just the first) = %s, allowundo: %d\n", debugstr_w(FileOp.pFrom), (FileOp.fFlags == FOF_ALLOWUNDO));
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int res = SHFileOperationW(&FileOp);
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if (res)
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{
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ERR("SHFileOperation failed with 0x%x\n", res);
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hr = E_FAIL;
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}
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GlobalUnlock(medium.hGlobal);
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ReleaseStgMedium(&medium);
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return hr;
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}
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struct DeleteThreadData {
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IStream *s;
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DWORD fMask;
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};
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static DWORD WINAPI _DoDeleteThreadProc(LPVOID lpParameter)
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{
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DeleteThreadData *data = static_cast<DeleteThreadData*>(lpParameter);
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CoInitialize(NULL);
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IDataObject *pDataObject;
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HRESULT hr = CoGetInterfaceAndReleaseStream (data->s, IID_PPV_ARG(IDataObject, &pDataObject));
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if (SUCCEEDED(hr))
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{
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_DoDeleteDataObject(pDataObject, data->fMask);
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}
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pDataObject->Release();
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CoUninitialize();
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HeapFree(GetProcessHeap(), 0, data);
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return 0;
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}
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static void _DoDeleteAsync(IDataObject *pda, DWORD fMask)
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{
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DeleteThreadData *data = static_cast<DeleteThreadData*>(HeapAlloc(GetProcessHeap(), 0, sizeof(DeleteThreadData)));
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data->fMask = fMask;
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CoMarshalInterThreadInterfaceInStream(IID_IDataObject, pda, &data->s);
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SHCreateThread(_DoDeleteThreadProc, data, NULL, NULL);
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}
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public:
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CRecyclerDropTarget()
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{
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fAcceptFmt = FALSE;
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cfShellIDList = RegisterClipboardFormatW(CFSTR_SHELLIDLIST);
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}
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HRESULT WINAPI DragEnter(IDataObject *pDataObject,
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DWORD dwKeyState, POINTL pt, DWORD *pdwEffect)
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{
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TRACE("Recycle bin drag over (%p)\n", this);
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/* The recycle bin accepts pretty much everything, and sets a CSIDL flag. */
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fAcceptFmt = TRUE;
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*pdwEffect = DROPEFFECT_MOVE;
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return S_OK;
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}
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HRESULT WINAPI DragOver(DWORD dwKeyState, POINTL pt, DWORD *pdwEffect)
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{
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TRACE("(%p)\n", this);
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if (!pdwEffect)
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return E_INVALIDARG;
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*pdwEffect = DROPEFFECT_MOVE;
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return S_OK;
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}
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HRESULT WINAPI DragLeave()
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{
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TRACE("(%p)\n", this);
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fAcceptFmt = FALSE;
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return S_OK;
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}
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HRESULT WINAPI Drop(IDataObject *pDataObject,
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DWORD grfKeyState, POINTL pt, DWORD *pdwEffect)
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{
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TRACE("(%p) object dropped on recycle bin, effect %u\n", this, *pdwEffect);
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FORMATETC fmt;
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TRACE("(%p)->(DataObject=%p)\n", this, pDataObject);
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InitFormatEtc (fmt, cfShellIDList, TYMED_HGLOBAL);
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/* Handle cfShellIDList Drop objects here, otherwise send the appropriate message to other software */
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if (SUCCEEDED(pDataObject->QueryGetData(&fmt)))
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{
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DWORD fMask = 0;
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if ((grfKeyState & MK_SHIFT) == MK_SHIFT)
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fMask |= CMIC_MASK_SHIFT_DOWN;
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_DoDeleteAsync(pDataObject, fMask);
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}
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else
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{
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/*
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* TODO call SetData on the data object with format CFSTR_TARGETCLSID
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* set to the Recycle Bin's class identifier CLSID_RecycleBin.
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*/
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}
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return S_OK;
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}
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DECLARE_NOT_AGGREGATABLE(CRecyclerDropTarget)
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DECLARE_PROTECT_FINAL_CONSTRUCT()
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BEGIN_COM_MAP(CRecyclerDropTarget)
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COM_INTERFACE_ENTRY_IID(IID_IDropTarget, IDropTarget)
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END_COM_MAP()
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};
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HRESULT CRecyclerDropTarget_CreateInstance(REFIID riid, LPVOID * ppvOut)
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{
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return ShellObjectCreator<CRecyclerDropTarget>(riid, ppvOut);
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}
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