479 lines
16 KiB
C++
479 lines
16 KiB
C++
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#include "shellprv.h"
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#pragma hdrstop
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#include "datautil.h"
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#include "brfcase.h"
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#include "views.h"
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#include "fsdata.h"
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//
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// This function is called from CFSIDLData_GetData().
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//
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// Paramters:
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// this -- Specifies the IDLData object (selected objects)
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// pmedium -- Pointer to STDMEDIUM to be filled; NULL if just querying.
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//
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HRESULT CFSIDLData::_GetNetResource(STGMEDIUM *pmedium)
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{
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STGMEDIUM medium;
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LPIDA pida = DataObj_GetHIDA(this, &medium);
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if (pida)
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{
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BOOL bIsMyNet = IsIDListInNameSpace(HIDA_GetPIDLFolder(pida), &CLSID_NetworkPlaces);
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HIDA_ReleaseStgMedium(pida, &medium);
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if (!bIsMyNet)
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return DV_E_FORMATETC;
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if (!pmedium)
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return S_OK; // query, yes we have it
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return CNetData_GetNetResourceForFS(this, pmedium);
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}
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return E_FAIL;
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}
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HRESULT CFSIDLData::QueryGetData(FORMATETC *pformatetc)
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{
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if (pformatetc->tymed & TYMED_HGLOBAL)
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{
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if ((pformatetc->cfFormat == CF_HDROP) ||
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(pformatetc->cfFormat == g_cfFileNameA) ||
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(pformatetc->cfFormat == g_cfFileNameW))
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{
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return S_OK;
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}
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else if (pformatetc->cfFormat == g_cfNetResource)
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{
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return _GetNetResource(NULL);
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}
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}
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return CIDLDataObj::QueryGetData(pformatetc);
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}
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HRESULT CFSIDLData::SetData(FORMATETC *pformatetc, STGMEDIUM *pmedium, BOOL fRelease)
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{
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HRESULT hr = CIDLDataObj::SetData(pformatetc, pmedium, fRelease);
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// this enables:
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// 1) in the shell "cut" some files
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// 2) in an app "paste" to copy the data
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// 3) here we complete the "cut" by deleting the files
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if ((pformatetc->cfFormat == g_cfPasteSucceeded) &&
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(pformatetc->tymed == TYMED_HGLOBAL))
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{
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DWORD *pdw = (DWORD *)GlobalLock(pmedium->hGlobal);
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if (pdw)
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{
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// NOTE: the old code use g_cfPerformedDropEffect == DROPEFFECT_MOVE here
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// so to work on downlevel shells be sure to set the "Performed Effect" before
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// using "Paste Succeeded".
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// complete the "unoptimized move"
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if (DROPEFFECT_MOVE == *pdw)
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{
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DeleteFilesInDataObject(NULL, CMIC_MASK_FLAG_NO_UI, this, 0);
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}
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GlobalUnlock(pmedium->hGlobal);
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}
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}
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return hr;
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}
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// Creates CF_HDROP clipboard format block of memory (HDROP) from HIDA in data object
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HRESULT CFSIDLData::CreateHDrop(STGMEDIUM *pmedium, BOOL fAltName)
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{
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ZeroMemory(pmedium, sizeof(*pmedium));
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HRESULT hr;
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STGMEDIUM medium;
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LPIDA pida = DataObj_GetHIDA(this, &medium);
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if (pida)
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{
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LPCITEMIDLIST pidlFolder = HIDA_GetPIDLFolder(pida);
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ASSERT(pidlFolder);
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IShellFolder *psf;
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hr = SHBindToObject(NULL, IID_X_PPV_ARG(IShellFolder, pidlFolder, &psf));
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if (SUCCEEDED(hr))
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{
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// Allocate too much to start out with, then re-alloc when we are done
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UINT cbAlloc = sizeof(DROPFILES) + sizeof(TCHAR); // header + null terminator
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UINT cbOriginalAlloc = cbAlloc + pida->cidl * MAX_PATH * sizeof(TCHAR);
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pmedium->hGlobal = GlobalAlloc(GPTR, cbOriginalAlloc);
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if (pmedium->hGlobal)
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{
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DROPFILES *pdf = (DROPFILES *)pmedium->hGlobal;
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LPTSTR pszFiles = (LPTSTR)(pdf + 1);
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pdf->pFiles = sizeof(DROPFILES);
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pdf->fWide = (sizeof(TCHAR) == sizeof(WCHAR));
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for (UINT i = 0; i < pida->cidl; i++)
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{
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LPCITEMIDLIST pidlItem = HIDA_GetPIDLItem(pida, i);
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// If we run across the Desktop pidl, then punt because it's
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// not a file
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if (ILIsEmpty(pidlItem) && ILIsEmpty(pidlFolder))
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{
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hr = DV_E_CLIPFORMAT; // No hdrop for you!
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break;
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}
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ASSERT(ILIsEmpty(_ILNext(pidlItem)) || ILIsEmpty(pidlFolder)); // otherwise GDNO will fail
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TCHAR szPath[MAX_PATH];
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hr = DisplayNameOf(psf, pidlItem, SHGDN_FORPARSING, szPath, ARRAYSIZE(szPath));
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if (FAILED(hr))
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break; // something bad happened
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if (fAltName)
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GetShortPathName(szPath, szPath, ARRAYSIZE(szPath));
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int cch = lstrlen(szPath) + 1;
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// prevent buffer overrun
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if ((LPBYTE)(pszFiles + cch) > ((LPBYTE)pmedium->hGlobal) + cbOriginalAlloc)
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{
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TraceMsg(TF_WARNING, "hdrop:%d'th file caused us to exceed allocated memory, breaking", i);
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break;
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}
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// we allocated MAX_PATH for each of the entries in this big double-null terminated buffer.
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StrCpyN(pszFiles, szPath, cch); // will write NULL terminator for us
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pszFiles += cch;
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cbAlloc += cch * sizeof(TCHAR);
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}
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if (SUCCEEDED(hr))
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{
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*pszFiles = 0; // double NULL terminate
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ASSERT((LPTSTR)((BYTE *)pdf + cbAlloc - sizeof(TCHAR)) == pszFiles);
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// re-alloc down to the amount we actually need
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// note that pdf and pszFiles are now both invalid (and not used anymore)
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pmedium->hGlobal = GlobalReAlloc(pdf, cbAlloc, GMEM_MOVEABLE);
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// If realloc failed, then just use the original buffer. It's
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// a bit wasteful of memory but it's all we've got.
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if (!pmedium->hGlobal)
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pmedium->hGlobal = (HGLOBAL)pdf;
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pmedium->tymed = TYMED_HGLOBAL;
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}
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else
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{
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GlobalFree(pmedium->hGlobal);
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pmedium->hGlobal = NULL;
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}
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}
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else
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hr = E_OUTOFMEMORY;
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psf->Release();
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}
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HIDA_ReleaseStgMedium(pida, &medium);
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}
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else
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hr = E_FAIL;
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return hr;
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}
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// Attempt to get the HDrop format: Create one from the HIDA if necessary
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HRESULT CFSIDLData::GetHDrop(FORMATETC *pformatetcIn, STGMEDIUM *pmedium)
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{
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STGMEDIUM tempmedium;
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HRESULT hr = CIDLDataObj::GetData(pformatetcIn, &tempmedium);
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if (FAILED(hr))
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{
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// Couldn't get HDROP format, create it
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// Set up a dummy formatetc to save in case multiple tymed's were specified
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FORMATETC fmtTemp = *pformatetcIn;
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fmtTemp.tymed = TYMED_HGLOBAL;
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hr = CreateHDrop(&tempmedium, pformatetcIn->dwAspect == DVASPECT_SHORTNAME);
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if (SUCCEEDED(hr))
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{
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// And we also want to cache this new format
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// .. Ensure that we actually free the memory associated with the HDROP
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// when the data object destructs (pUnkForRelease = NULL)
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ASSERT(tempmedium.pUnkForRelease == NULL);
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if (SUCCEEDED(SetData(&fmtTemp, &tempmedium, TRUE)))
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{
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// Now the old medium that we just set is owned by the data object - call
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// GetData to get a medium that is safe to release when we're done.
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hr = CIDLDataObj::GetData(pformatetcIn, &tempmedium);
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}
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else
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{
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TraceMsg(TF_WARNING, "Couldn't save the HDrop format to the data object - returning private version");
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}
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}
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}
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// HACKHACK
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// Some context menu extensions just release the hGlobal instead of
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// calling ReleaseStgMedium. This causes a reference counted data
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// object to fail. Therefore, we always allocate a new HGLOBAL for
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// each request. Unfortunately necessary because Quickview
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// Pro does this.
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//
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// Ideally we'd like to set the pUnkForRelease and not have to
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// dup the hGlobal each time, but alas Quickview has called our bluff
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// and GlobalFree()'s it.
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if (SUCCEEDED(hr))
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{
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if (pmedium)
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{
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*pmedium = tempmedium;
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pmedium->pUnkForRelease = NULL;
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// Make a copy of this hglobal to pass back
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SIZE_T cbhGlobal = GlobalSize(tempmedium.hGlobal);
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if (cbhGlobal)
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{
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pmedium->hGlobal = GlobalAlloc(0, (UINT)cbhGlobal);
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if (pmedium->hGlobal)
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{
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CopyMemory(pmedium->hGlobal, tempmedium.hGlobal, cbhGlobal);
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}
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else
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{
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hr = E_OUTOFMEMORY;
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}
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}
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else
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{
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hr = E_UNEXPECTED;
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}
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}
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else
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{
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hr = E_INVALIDARG;
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}
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ReleaseStgMedium(&tempmedium);
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}
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return hr;
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}
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// subclass member function to support CF_HDROP and CF_NETRESOURCE
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HRESULT CFSIDLData::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium)
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{
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HRESULT hr = E_INVALIDARG;
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// If we don't zero out the pmedium then briefcase will fault on win9x. Breifcase tries
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// to free this medium even if this function returns an error. Not all paths below correctly
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// set the pmedium in all cases.
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ZeroMemory(pmedium, sizeof(*pmedium));
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if ((pformatetcIn->cfFormat == CF_HDROP) && (pformatetcIn->tymed & TYMED_HGLOBAL))
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{
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hr = GetHDrop(pformatetcIn, pmedium);
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}
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else if ((pformatetcIn->cfFormat == g_cfFileNameA || pformatetcIn->cfFormat == g_cfFileNameW) &&
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(pformatetcIn->tymed & TYMED_HGLOBAL))
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{
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FORMATETC format = *pformatetcIn;
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BOOL bUnicode = pformatetcIn->cfFormat == g_cfFileNameW;
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// assume g_cfFileNameA clients want short name
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if (pformatetcIn->cfFormat == g_cfFileNameA)
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format.dwAspect = DVASPECT_SHORTNAME;
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STGMEDIUM medium;
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hr = GetHDrop(&format, &medium);
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if (SUCCEEDED(hr))
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{
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TCHAR szPath[MAX_PATH];
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if (DragQueryFile((HDROP)medium.hGlobal, 0, szPath, ARRAYSIZE(szPath)))
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{
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UINT cch = lstrlen(szPath) + 1;
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UINT uSize = cch * (bUnicode ? sizeof(WCHAR) : sizeof(CHAR));
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pmedium->hGlobal = GlobalAlloc(GPTR, uSize);
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if (pmedium->hGlobal)
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{
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if (bUnicode)
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SHTCharToUnicode(szPath, (LPWSTR)pmedium->hGlobal, cch);
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else
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SHTCharToAnsi(szPath, (LPSTR)pmedium->hGlobal, cch);
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pmedium->tymed = TYMED_HGLOBAL;
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pmedium->pUnkForRelease = NULL;
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hr = S_OK;
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}
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else
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hr = E_OUTOFMEMORY;
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}
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else
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{
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hr = E_UNEXPECTED;
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}
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ReleaseStgMedium(&medium);
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}
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}
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else if (pformatetcIn->cfFormat == g_cfNetResource && (pformatetcIn->tymed & TYMED_HGLOBAL))
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{
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hr = _GetNetResource(pmedium);
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}
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else
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{
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hr = CIDLDataObj::GetData(pformatetcIn, pmedium);
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}
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return hr;
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}
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STDAPI SHCreateFileDataObject(LPCITEMIDLIST pidlFolder, UINT cidl, LPCITEMIDLIST *apidl,
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IDataObject *pdtInner, IDataObject **ppdtobj)
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{
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*ppdtobj = new CFSIDLData(pidlFolder, cidl, apidl, pdtInner);
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return *ppdtobj ? S_OK : E_OUTOFMEMORY;
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}
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/*
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Purpose: Gets the root path of the briefcase storage and copies
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it into the buffer.
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This function obtains the briefcase storage root by
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binding to an IShellFolder (briefcase) instance of the
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pidl. This parent is be an CFSBrfFolder *, so we can
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call the IBriefcaseStg::GetExtraInfo member function.
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Returns: standard result
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Cond: --
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*/
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HRESULT GetBriefcaseRoot(LPCITEMIDLIST pidl, LPTSTR pszBuf, int cchBuf)
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{
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IBriefcaseStg *pbrfstg;
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HRESULT hr = CreateBrfStgFromIDList(pidl, NULL, &pbrfstg);
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if (SUCCEEDED(hr))
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{
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hr = pbrfstg->GetExtraInfo(NULL, GEI_ROOT, (WPARAM)cchBuf, (LPARAM)pszBuf);
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pbrfstg->Release();
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}
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return hr;
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}
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// Packages a BriefObj struct into pmedium from a HIDA.
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HRESULT CBriefcaseData_GetBriefObj(IDataObject *pdtobj, STGMEDIUM *pmedium)
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{
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|
|
HRESULT hr = E_OUTOFMEMORY;
|
||
|
|
LPITEMIDLIST pidl = ILCreate();
|
||
|
|
if (pidl)
|
||
|
|
{
|
||
|
|
STGMEDIUM medium;
|
||
|
|
|
||
|
|
if (DataObj_GetHIDA(pdtobj, &medium))
|
||
|
|
{
|
||
|
|
UINT cFiles = HIDA_GetCount(medium.hGlobal);
|
||
|
|
// "cFiles+1" includes the briefpath...
|
||
|
|
UINT cbSize = sizeof(BriefObj) + MAX_PATH * sizeof(TCHAR) * (cFiles + 1) + 1;
|
||
|
|
|
||
|
|
PBRIEFOBJ pbo = (PBRIEFOBJ)GlobalAlloc(GPTR, cbSize);
|
||
|
|
if (pbo)
|
||
|
|
{
|
||
|
|
LPITEMIDLIST pidlT;
|
||
|
|
LPTSTR pszFiles = (LPTSTR)((LPBYTE)pbo + _IOffset(BriefObj, data));
|
||
|
|
|
||
|
|
pbo->cbSize = cbSize;
|
||
|
|
pbo->cItems = cFiles;
|
||
|
|
pbo->cbListSize = MAX_PATH * sizeof(TCHAR) * cFiles + 1;
|
||
|
|
pbo->ibFileList = _IOffset(BriefObj, data);
|
||
|
|
|
||
|
|
for (UINT i = 0; i < cFiles; i++)
|
||
|
|
{
|
||
|
|
pidlT = HIDA_FillIDList(medium.hGlobal, i, pidl);
|
||
|
|
if (NULL == pidlT)
|
||
|
|
break; // out of memory
|
||
|
|
|
||
|
|
pidl = pidlT;
|
||
|
|
SHGetPathFromIDList(pidl, pszFiles); // pszFiles has room for MAX_PATH on each file
|
||
|
|
pszFiles += lstrlen(pszFiles)+1;
|
||
|
|
}
|
||
|
|
*pszFiles = TEXT('\0');
|
||
|
|
|
||
|
|
if (i < cFiles)
|
||
|
|
{
|
||
|
|
// Out of memory, fail
|
||
|
|
ASSERT(NULL == pidlT);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Make pszFiles point to beginning of szBriefPath buffer
|
||
|
|
pszFiles++;
|
||
|
|
pbo->ibBriefPath = (UINT) ((LPBYTE)pszFiles - (LPBYTE)pbo);
|
||
|
|
pidlT = HIDA_FillIDList(medium.hGlobal, 0, pidl);
|
||
|
|
if (pidlT)
|
||
|
|
{
|
||
|
|
pidl = pidlT;
|
||
|
|
// we have room for the briefcase path from our +1 above
|
||
|
|
hr = GetBriefcaseRoot(pidl, pszFiles, MAX_PATH);
|
||
|
|
|
||
|
|
pmedium->tymed = TYMED_HGLOBAL;
|
||
|
|
pmedium->hGlobal = pbo;
|
||
|
|
|
||
|
|
// Indicate that the caller should release hmem.
|
||
|
|
pmedium->pUnkForRelease = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
HIDA_ReleaseStgMedium(NULL, &medium);
|
||
|
|
}
|
||
|
|
ILFree(pidl);
|
||
|
|
}
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
class CBriefcaseData : public CFSIDLData
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
CBriefcaseData(LPCITEMIDLIST pidlFolder, UINT cidl, LPCITEMIDLIST apidl[]): CFSIDLData(pidlFolder, cidl, apidl, NULL) { };
|
||
|
|
|
||
|
|
// IDataObject
|
||
|
|
STDMETHODIMP GetData(FORMATETC *pFmtEtc, STGMEDIUM *pstm);
|
||
|
|
STDMETHODIMP QueryGetData(FORMATETC *pFmtEtc);
|
||
|
|
};
|
||
|
|
|
||
|
|
STDMETHODIMP CBriefcaseData::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium)
|
||
|
|
{
|
||
|
|
HRESULT hr;
|
||
|
|
|
||
|
|
if (pformatetcIn->cfFormat == g_cfBriefObj && (pformatetcIn->tymed & TYMED_HGLOBAL))
|
||
|
|
{
|
||
|
|
hr = CBriefcaseData_GetBriefObj(this, pmedium);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
hr = CFSIDLData::GetData(pformatetcIn, pmedium);
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
// IDataObject::QueryGetData
|
||
|
|
|
||
|
|
STDMETHODIMP CBriefcaseData::QueryGetData(FORMATETC *pformatetc)
|
||
|
|
{
|
||
|
|
if (pformatetc->cfFormat == g_cfBriefObj && (pformatetc->tymed & TYMED_HGLOBAL))
|
||
|
|
return S_OK;
|
||
|
|
|
||
|
|
return CFSIDLData::QueryGetData(pformatetc);
|
||
|
|
}
|
||
|
|
|
||
|
|
STDAPI CBrfData_CreateDataObj(LPCITEMIDLIST pidl, UINT cidl, LPCITEMIDLIST *ppidl, IDataObject **ppdtobj)
|
||
|
|
{
|
||
|
|
*ppdtobj = new CBriefcaseData(pidl, cidl, ppidl);
|
||
|
|
return *ppdtobj ? S_OK : E_OUTOFMEMORY;
|
||
|
|
}
|
||
|
|
|