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WindowsXP-SP1/shell/shell32/fsdrptgt.cpp

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#include "shellprv.h"
#include <cowsite.h>
#include "datautil.h"
#include "ids.h"
#include "defview.h"
#include "_security.h"
#include "shitemid.h"
#include "idlcomm.h"
#include "bitbuck.h"
#include "bookmk.h"
#include "filefldr.h"
#include "brfcase.h"
#include "copy.h"
#include "filetbl.h"
#define TF_DRAGDROP 0x04000000
typedef struct
{
HWND hwnd;
DWORD dwFlags;
POINTL pt;
CHAR szUrl[INTERNET_MAX_URL_LENGTH];
} ADDTODESKTOP;
DWORD CALLBACK AddToActiveDesktopThreadProc(void *pv)
{
ADDTODESKTOP* pToAD = (ADDTODESKTOP*)pv;
CHAR szFilePath[MAX_PATH];
DWORD cchFilePath = SIZECHARS(szFilePath);
BOOL fAddComp = TRUE;
if (SUCCEEDED(PathCreateFromUrlA(pToAD->szUrl, szFilePath, &cchFilePath, 0)))
{
TCHAR szPath[MAX_PATH];
SHAnsiToTChar(szFilePath, szPath, ARRAYSIZE(szPath));
// If the Url is in the Temp directory
if (PathIsTemporary(szPath))
{
if (IDYES == ShellMessageBox(g_hinst, pToAD->hwnd, MAKEINTRESOURCE(IDS_REASONS_URLINTEMPDIR),
MAKEINTRESOURCE(IDS_AD_NAME), MB_YESNO | MB_ICONQUESTION))
{
TCHAR szFilter[64], szTitle[64];
TCHAR szFilename[MAX_PATH];
LPTSTR psz;
OPENFILENAME ofn = { 0 };
LoadString(g_hinst, IDS_ALLFILESFILTER, szFilter, ARRAYSIZE(szFilter));
LoadString(g_hinst, IDS_SAVEAS, szTitle, ARRAYSIZE(szTitle));
psz = szFilter;
//Strip out the # and make them Nulls for SaveAs Dialog
while (*psz)
{
if (*psz == (WCHAR)('#'))
*psz = (WCHAR)('\0');
psz++;
}
lstrcpy(szFilename, PathFindFileName(szPath));
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.hwndOwner = pToAD->hwnd;
ofn.hInstance = g_hinst;
ofn.lpstrFilter = szFilter;
ofn.lpstrFile = szFilename;
ofn.nMaxFile = ARRAYSIZE(szFilename);
ofn.lpstrTitle = szTitle;
ofn.Flags = OFN_EXPLORER | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT | OFN_PATHMUSTEXIST;
if (GetSaveFileName(&ofn))
{
SHFILEOPSTRUCT sfo = { 0 };
szPath[lstrlen(szPath) + 1] = 0;
ofn.lpstrFile[lstrlen(ofn.lpstrFile) + 1] = 0;
sfo.hwnd = pToAD->hwnd;
sfo.wFunc = FO_COPY;
sfo.pFrom = szPath;
sfo.pTo = ofn.lpstrFile;
cchFilePath = SIZECHARS(szPath);
if (SHFileOperation(&sfo) == 0 &&
SUCCEEDED(UrlCreateFromPath(szPath, szPath, &cchFilePath, 0)))
{
SHTCharToAnsi(szPath, pToAD->szUrl, ARRAYSIZE(pToAD->szUrl));
}
else
fAddComp = FALSE;
}
else
fAddComp = FALSE;
}
else
fAddComp = FALSE;
}
}
if (fAddComp)
CreateDesktopComponents(pToAD->szUrl, NULL, pToAD->hwnd, pToAD->dwFlags, pToAD->pt.x, pToAD->pt.y);
LocalFree((HLOCAL)pToAD);
return 0;
}
typedef struct {
DWORD dwDefEffect;
IDataObject *pdtobj;
POINTL pt;
DWORD * pdwEffect;
HKEY rghk[MAX_ASSOC_KEYS];
DWORD ck;
HMENU hmenu;
UINT idCmd;
DWORD grfKeyState;
} FSDRAGDROPMENUPARAM;
typedef struct
{
HMENU hMenu;
UINT uCopyPos;
UINT uMovePos;
UINT uLinkPos;
} FSMENUINFO;
class CFSDropTarget : CObjectWithSite, public IDropTarget
{
public:
// IUnknown
STDMETHODIMP QueryInterface(REFIID riid, void **ppv);
STDMETHODIMP_(ULONG) AddRef(void);
STDMETHODIMP_(ULONG) Release(void);
// IDropTarget
STDMETHODIMP DragEnter(IDataObject* pdtobj, DWORD grfKeyState, POINTL pt, DWORD* pdwEffect);
STDMETHODIMP DragOver(DWORD grfKeyState, POINTL pt, DWORD* pdwEffect);
STDMETHODIMP DragLeave();
STDMETHODIMP Drop(IDataObject* pdtobj, DWORD grfKeyState, POINTL pt, DWORD* pdwEffect);
CFSDropTarget(CFSFolder *pFolder, HWND hwnd);
protected:
virtual ~CFSDropTarget();
BOOL _IsBriefcaseTarget() { return IsEqualCLSID(_pFolder->_clsidBind, CLSID_BriefcaseFolder); };
BOOL _IsDesktopFolder() { return _GetIDList() && ILIsEmpty(_GetIDList()); };
HRESULT _FilterFileContents(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterFileContentsOLEHack(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterDeskCompHDROP(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterSneakernetBriefcase(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterBriefcase(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterHDROP(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterHIDA(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterDeskImage(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterDeskComp(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterOlePackage(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterOleObj(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
HRESULT _FilterOleLink(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo);
DWORD _FilesystemAdjustedDefaultEffect(DWORD dwCurEffectAvail);
HRESULT _GetPath(LPTSTR pszPath);
LPCITEMIDLIST _GetIDList();
DWORD _LimitDefaultEffect(DWORD dwDefEffect, DWORD dwEffectsAllowed);
DWORD _GetDefaultEffect(DWORD grfKeyState, DWORD dwCurEffectAvail, DWORD dwAllEffectAvail, DWORD dwOrigDefEffect);
DWORD _DetermineEffects(DWORD grfKeyState, DWORD *pdwEffectInOut, HMENU hmenu);
DWORD _EffectFromFolder();
typedef struct
{
CFSDropTarget *pThis;
IStream *pstmDataObj;
IStream *pstmFolderView;
} DROPTHREADPARAMS;
static void _FreeThreadParams(DROPTHREADPARAMS *pdtp);
static DWORD CALLBACK _DoDropThreadProc(void *pv);
void _DoDrop(IDataObject *pdtobj, IFolderView* pfv);
static void _AddVerbs(DWORD* pdwEffects, DWORD dwEffectAvail, DWORD dwDefEffect,
UINT idCopy, UINT idMove, UINT idLink,
DWORD dwForceEffect, FSMENUINFO* pfsMenuInfo);
void _FixUpDefaultItem(HMENU hmenu, DWORD dwDefEffect);
HRESULT _DragDropMenu(FSDRAGDROPMENUPARAM *pddm);
HRESULT _CreatePackage(IDataObject *pdtobj);
HRESULT _CreateURLDeskComp(IDataObject *pdtobj, POINTL pt);
HRESULT _CreateDeskCompImage(IDataObject *pdtobj, POINTL pt);
void _GetStateFromSite();
BOOL _IsFromSneakernetBriefcase();
BOOL _IsFromSameBriefcase();
void _MoveCopy(IDataObject *pdtobj, IFolderView* pfv, HDROP hDrop);
void _MoveSelectIcons(IDataObject *pdtobj, IFolderView* pfv, void *hNameMap, LPCTSTR pszFiles, BOOL fMove, HDROP hDrop);
LONG _cRef;
CFSFolder *_pFolder;
HWND _hwnd; // EVIL: used as a site and UI host
UINT _idCmd;
DWORD _grfKeyStateLast; // for previous DragOver/Enter
IDataObject *_pdtobj; // used durring Dragover() and DoDrop(), don't use on background thread
DWORD _dwEffectLastReturned; // stashed effect that's returned by base class's dragover
DWORD _dwEffect;
DWORD _dwData; // DTID_*
DWORD _dwEffectPreferred; // if dwData & DTID_PREFERREDEFFECT
DWORD _dwEffectFolder; // folder desktop.ini preferred effect
BOOL _fSameHwnd; // the drag source and target are the same folder
BOOL _fDragDrop; //
BOOL _fUseExactDropPoint; // Don't transform the drop point. The target knows exactly where it wants things.
BOOL _fBkDropTarget;
POINT _ptDrop;
IFolderView* _pfv;
typedef struct {
FORMATETC fmte;
HRESULT (CFSDropTarget::*pfnGetDragDropInfo)(
IN FORMATETC* pfmte,
IN DWORD grfKeyFlags,
IN DWORD dwEffectsAvail,
IN OUT DWORD* pdwEffectsUsed,
OUT DWORD* pdwDefaultEffect,
IN OUT FSMENUINFO* pfsMenuInfo);
CLIPFORMAT *pcfInit;
} _DATA_HANDLER;
// HACKHACK: C++ doesn't let you initialize statics inside a class
// definition, and also doesn't let you specify an empty
// size (i.e., rg_data_handlers[]) inside a class definition
// either, so we have to have this bogus NUM_DATA_HANDLERS
// symbol that must manually be kept in sync.
enum { NUM_DATA_HANDLERS = 16 };
static _DATA_HANDLER rg_data_handlers[NUM_DATA_HANDLERS];
static void _Init_rg_data_handlers();
private:
friend HRESULT CFSDropTarget_CreateInstance(CFSFolder* pFolder, HWND hwnd, IDropTarget** ppdt);
};
CFSDropTarget::CFSDropTarget(CFSFolder *pFolder, HWND hwnd) : _cRef(1), _hwnd(hwnd), _pFolder(pFolder), _dwEffectFolder(-1)
{
ASSERT(0 == _grfKeyStateLast);
ASSERT(NULL == _pdtobj);
ASSERT(0 == _dwEffectLastReturned);
ASSERT(0 == _dwData);
ASSERT(0 == _dwEffectPreferred);
_pFolder->AddRef();
}
CFSDropTarget::~CFSDropTarget()
{
AssertMsg(_pdtobj == NULL, TEXT("didn't get matching DragLeave, fix that bug"));
ATOMICRELEASE(_pdtobj);
ATOMICRELEASE(_pfv);
_pFolder->Release();
}
STDAPI CFSDropTarget_CreateInstance(CFSFolder* pFolder, HWND hwnd, IDropTarget** ppdt)
{
*ppdt = new CFSDropTarget(pFolder, hwnd);
return *ppdt ? S_OK : E_OUTOFMEMORY;
}
HRESULT CFSDropTarget::QueryInterface(REFIID riid, void** ppvObj)
{
static const QITAB qit[] = {
QITABENT(CFSDropTarget, IDropTarget),
QITABENT(CFSDropTarget, IObjectWithSite),
QITABENTMULTI2(CFSDropTarget, IID_IDropTargetWithDADSupport, IDropTarget),
{ 0 },
};
return QISearch(this, qit, riid, ppvObj);
}
STDMETHODIMP_(ULONG) CFSDropTarget::AddRef()
{
return InterlockedIncrement(&_cRef);
}
STDMETHODIMP_(ULONG) CFSDropTarget::Release()
{
if (InterlockedDecrement(&_cRef))
return _cRef;
delete this;
return 0;
}
void CFSDropTarget::_FreeThreadParams(DROPTHREADPARAMS *pdtp)
{
pdtp->pThis->Release();
ATOMICRELEASE(pdtp->pstmDataObj);
ATOMICRELEASE(pdtp->pstmFolderView);
LocalFree(pdtp);
}
// compute DTID_ bit flags from the data object to make format testing easier for
// DragOver() and Drop() code
STDAPI GetClipFormatFlags(IDataObject *pdtobj, DWORD *pdwData, DWORD *pdwEffectPreferred)
{
*pdwData = 0;
*pdwEffectPreferred = 0;
if (pdtobj)
{
IEnumFORMATETC *penum;
if (SUCCEEDED(pdtobj->EnumFormatEtc(DATADIR_GET, &penum)))
{
FORMATETC fmte;
ULONG celt;
while (S_OK == penum->Next(1, &fmte, &celt))
{
if (fmte.cfFormat == CF_HDROP && (fmte.tymed & TYMED_HGLOBAL))
*pdwData |= DTID_HDROP;
if (fmte.cfFormat == g_cfHIDA && (fmte.tymed & TYMED_HGLOBAL))
*pdwData |= DTID_HIDA;
if (fmte.cfFormat == g_cfNetResource && (fmte.tymed & TYMED_HGLOBAL))
*pdwData |= DTID_NETRES;
if (fmte.cfFormat == g_cfEmbeddedObject && (fmte.tymed & TYMED_ISTORAGE))
*pdwData |= DTID_EMBEDDEDOBJECT;
if (fmte.cfFormat == g_cfFileContents && (fmte.tymed & (TYMED_HGLOBAL | TYMED_ISTREAM | TYMED_ISTORAGE)))
*pdwData |= DTID_CONTENTS;
if (fmte.cfFormat == g_cfFileGroupDescriptorA && (fmte.tymed & TYMED_HGLOBAL))
*pdwData |= DTID_FDESCA;
if (fmte.cfFormat == g_cfFileGroupDescriptorW && (fmte.tymed & TYMED_HGLOBAL))
*pdwData |= DTID_FDESCW;
if ((fmte.cfFormat == g_cfPreferredDropEffect) &&
(fmte.tymed & TYMED_HGLOBAL) &&
(DROPEFFECT_NONE != (*pdwEffectPreferred = DataObj_GetDWORD(pdtobj, g_cfPreferredDropEffect, DROPEFFECT_NONE))))
{
*pdwData |= DTID_PREFERREDEFFECT;
}
#ifdef DEBUG
TCHAR szFormat[MAX_PATH];
if (GetClipboardFormatName(fmte.cfFormat, szFormat, ARRAYSIZE(szFormat)))
{
TraceMsg(TF_DRAGDROP, "CFSDropTarget - cf %s, tymed %d", szFormat, fmte.tymed);
}
else
{
TraceMsg(TF_DRAGDROP, "CFSDropTarget - cf %d, tymed %d", fmte.cfFormat, fmte.tymed);
}
#endif // DEBUG
SHFree(fmte.ptd);
}
penum->Release();
}
//
// HACK:
// Win95 always did the GetData below which can be quite expensive if
// the data is a directory structure on an ftp server etc.
// dont check for FD_LINKUI if the data object has a preferred effect
//
if ((*pdwData & (DTID_PREFERREDEFFECT | DTID_CONTENTS)) == DTID_CONTENTS)
{
if (*pdwData & DTID_FDESCA)
{
FORMATETC fmteRead = {g_cfFileGroupDescriptorA, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM medium = {0};
if (S_OK == pdtobj->GetData(&fmteRead, &medium))
{
FILEGROUPDESCRIPTORA * pfgd = (FILEGROUPDESCRIPTORA *)GlobalLock(medium.hGlobal);
if (pfgd)
{
if (pfgd->cItems >= 1)
{
if (pfgd->fgd[0].dwFlags & FD_LINKUI)
*pdwData |= DTID_FD_LINKUI;
}
GlobalUnlock(medium.hGlobal);
}
ReleaseStgMedium(&medium);
}
}
else if (*pdwData & DTID_FDESCW)
{
FORMATETC fmteRead = {g_cfFileGroupDescriptorW, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM medium = {0};
if (S_OK == pdtobj->GetData(&fmteRead, &medium))
{
FILEGROUPDESCRIPTORW * pfgd = (FILEGROUPDESCRIPTORW *)GlobalLock(medium.hGlobal);
if (pfgd)
{
if (pfgd->cItems >= 1)
{
if (pfgd->fgd[0].dwFlags & FD_LINKUI)
*pdwData |= DTID_FD_LINKUI;
}
GlobalUnlock(medium.hGlobal);
}
ReleaseStgMedium(&medium);
}
}
}
if (S_OK == OleQueryCreateFromData(pdtobj))
*pdwData |= DTID_OLEOBJ;
if (S_OK == OleQueryLinkFromData(pdtobj))
*pdwData |= DTID_OLELINK;
}
return S_OK; // for now always succeeds
}
STDMETHODIMP CFSDropTarget::DragEnter(IDataObject* pdtobj, DWORD grfKeyState, POINTL pt, DWORD* pdwEffect)
{
ASSERT(NULL == _pdtobj); // req DragDrop protocol, someone forgot to call DragLeave
// init our registerd data formats
IDLData_InitializeClipboardFormats();
_grfKeyStateLast = grfKeyState;
IUnknown_Set((IUnknown **)&_pdtobj, pdtobj);
GetClipFormatFlags(_pdtobj, &_dwData, &_dwEffectPreferred);
*pdwEffect = _dwEffectLastReturned = _DetermineEffects(grfKeyState, pdwEffect, NULL);
return S_OK;
}
STDMETHODIMP CFSDropTarget::DragOver(DWORD grfKeyState, POINTL pt, DWORD* pdwEffect)
{
if (_grfKeyStateLast != grfKeyState)
{
_grfKeyStateLast = grfKeyState;
*pdwEffect = _dwEffectLastReturned = _DetermineEffects(grfKeyState, pdwEffect, NULL);
}
else
{
*pdwEffect = _dwEffectLastReturned;
}
return S_OK;
}
STDMETHODIMP CFSDropTarget::DragLeave()
{
IUnknown_Set((IUnknown **)&_pdtobj, NULL);
return S_OK;
}
// init data from our site that we will need in processing the drop
void CFSDropTarget::_GetStateFromSite()
{
IShellFolderView* psfv;
if (SUCCEEDED(IUnknown_QueryService(_punkSite, SID_SFolderView, IID_PPV_ARG(IShellFolderView, &psfv))))
{
_fSameHwnd = S_OK == psfv->IsDropOnSource((IDropTarget*)this);
_fDragDrop = S_OK == psfv->GetDropPoint(&_ptDrop);
_fBkDropTarget = S_OK == psfv->IsBkDropTarget(NULL);
psfv->QueryInterface(IID_PPV_ARG(IFolderView, &_pfv));
psfv->Release();
}
}
STDMETHODIMP CFSDropTarget::Drop(IDataObject* pdtobj, DWORD grfKeyState, POINTL pt, DWORD* pdwEffect)
{
// OLE may give us a different data object (fully marshalled)
// from the one we've got on DragEnter (this is not the case on Win2k, this is a nop)
IUnknown_Set((IUnknown **)&_pdtobj, pdtobj);
_GetStateFromSite();
// note, that on the drop the mouse buttons are not down so the grfKeyState
// is not what we saw on the DragOver/DragEnter, thus we need to cache
// the grfKeyState to detect left vs right drag
//
// ASSERT(this->grfKeyStateLast == grfKeyState);
HMENU hmenu = SHLoadPopupMenu(HINST_THISDLL, POPUP_TEMPLATEDD);
DWORD dwDefEffect = _DetermineEffects(grfKeyState, pdwEffect, hmenu);
if (DROPEFFECT_NONE == dwDefEffect)
{
*pdwEffect = DROPEFFECT_NONE;
DAD_SetDragImage(NULL, NULL);
IUnknown_Set((IUnknown **)&_pdtobj, NULL);
return S_OK;
}
TCHAR szPath[MAX_PATH];
_GetPath(szPath);
// this doesn't actually do the menu if (grfKeyState MK_LBUTTON)
FSDRAGDROPMENUPARAM ddm;
ddm.dwDefEffect = dwDefEffect;
ddm.pdtobj = pdtobj;
ddm.pt = pt;
ddm.pdwEffect = pdwEffect;
ddm.ck = SHGetAssocKeysForIDList(_GetIDList(), ddm.rghk, ARRAYSIZE(ddm.rghk));
ddm.hmenu = hmenu;
ddm.grfKeyState = grfKeyState;
HRESULT hr = _DragDropMenu(&ddm);
SHRegCloseKeys(ddm.rghk, ddm.ck);
DestroyMenu(hmenu);
if (hr == S_FALSE)
{
// let callers know where this is about to go
// SHScrap cares because it needs to close the file so we can copy/move it
DataObj_SetDropTarget(pdtobj, &CLSID_ShellFSFolder);
switch (ddm.idCmd)
{
case DDIDM_CONTENTS_DESKCOMP:
hr = CreateDesktopComponents(NULL, pdtobj, _hwnd, 0, ddm.pt.x, ddm.pt.y);
break;
case DDIDM_CONTENTS_DESKURL:
hr = _CreateURLDeskComp(pdtobj, ddm.pt);
break;
case DDIDM_CONTENTS_DESKIMG:
hr = _CreateDeskCompImage(pdtobj, ddm.pt);
break;
case DDIDM_CONTENTS_COPY:
case DDIDM_CONTENTS_MOVE:
case DDIDM_CONTENTS_LINK:
hr = CFSFolder_AsyncCreateFileFromClip(_hwnd, szPath, pdtobj, pt, pdwEffect, _fBkDropTarget);
break;
case DDIDM_SCRAP_COPY:
case DDIDM_SCRAP_MOVE:
case DDIDM_DOCLINK:
hr = SHCreateBookMark(_hwnd, szPath, pdtobj, pt, pdwEffect);
break;
case DDIDM_OBJECT_COPY:
case DDIDM_OBJECT_MOVE:
hr = _CreatePackage(pdtobj);
if (E_UNEXPECTED == hr)
{
// _CreatePackage() can only expand certain types of packages
// back into files. For example, it doesn't handle CMDLINK files.
//
// If _CreatePackage() didn't recognize the stream format, we fall
// back to SHCreateBookMark(), which should create a scrap:
hr = SHCreateBookMark(_hwnd, szPath, pdtobj, pt, pdwEffect);
}
break;
case DDIDM_COPY:
case DDIDM_SYNCCOPY:
case DDIDM_SYNCCOPYTYPE:
case DDIDM_MOVE:
case DDIDM_LINK:
_dwEffect = *pdwEffect;
_idCmd = ddm.idCmd;
if (DataObj_CanGoAsync(pdtobj) || DataObj_GoAsyncForCompat(pdtobj))
{
// create another thread to avoid blocking the source thread.
DROPTHREADPARAMS *pdtp;
hr = SHLocalAlloc(sizeof(*pdtp), &pdtp);
if (SUCCEEDED(hr))
{
pdtp->pThis = this;
pdtp->pThis->AddRef();
CoMarshalInterThreadInterfaceInStream(IID_IDataObject, pdtobj, &pdtp->pstmDataObj);
CoMarshalInterThreadInterfaceInStream(IID_IFolderView, _pfv, &pdtp->pstmFolderView);
if (SHCreateThread(_DoDropThreadProc, pdtp, CTF_COINIT, NULL))
{
hr = S_OK;
}
else
{
_FreeThreadParams(pdtp);
hr = E_OUTOFMEMORY;
}
}
}
else
{
_DoDrop(pdtobj, _pfv); // synchronously
}
// in these CF_HDROP cases "Move" is always an optimized move, we delete the
// source. make sure we don't return DROPEFFECT_MOVE so the source does not
// try to do this too...
// even if we have not done anything yet since we may have
// kicked of a thread to do this
DataObj_SetDWORD(pdtobj, g_cfLogicalPerformedDropEffect, *pdwEffect);
if (DROPEFFECT_MOVE == *pdwEffect)
*pdwEffect = DROPEFFECT_NONE;
break;
}
}
IUnknown_Set((IUnknown **)&_pdtobj, NULL); // don't use this any more
if (FAILED(hr))
*pdwEffect = DROPEFFECT_NONE;
ASSERT(*pdwEffect==DROPEFFECT_COPY ||
*pdwEffect==DROPEFFECT_LINK ||
*pdwEffect==DROPEFFECT_MOVE ||
*pdwEffect==DROPEFFECT_NONE);
return hr;
}
void CFSDropTarget::_AddVerbs(DWORD* pdwEffects, DWORD dwEffectAvail, DWORD dwDefEffect,
UINT idCopy, UINT idMove, UINT idLink,
DWORD dwForceEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
MENUITEMINFO mii;
TCHAR szCmd[MAX_PATH];
if (NULL != pfsMenuInfo)
{
mii.cbSize = sizeof(mii);
mii.dwTypeData = szCmd;
mii.fMask = MIIM_ID | MIIM_TYPE | MIIM_STATE | MIIM_DATA;
mii.fType = MFT_STRING;
}
if ((DROPEFFECT_COPY == (DROPEFFECT_COPY & dwEffectAvail)) &&
((0 == (*pdwEffects & DROPEFFECT_COPY)) || (dwForceEffect & DROPEFFECT_COPY)))
{
ASSERT(0 != idCopy);
if (NULL != pfsMenuInfo)
{
LoadString(HINST_THISDLL, idCopy + IDS_DD_FIRST, szCmd, ARRAYSIZE(szCmd));
mii.fState = MFS_ENABLED | ((DROPEFFECT_COPY == dwDefEffect) ? MFS_DEFAULT : 0);
mii.wID = idCopy;
mii.dwItemData = DROPEFFECT_COPY;
InsertMenuItem(pfsMenuInfo->hMenu, pfsMenuInfo->uCopyPos, TRUE, &mii);
pfsMenuInfo->uCopyPos++;
pfsMenuInfo->uMovePos++;
pfsMenuInfo->uLinkPos++;
}
}
if ((DROPEFFECT_MOVE == (DROPEFFECT_MOVE & dwEffectAvail)) &&
((0 == (*pdwEffects & DROPEFFECT_MOVE)) || (dwForceEffect & DROPEFFECT_MOVE)))
{
ASSERT(0 != idMove);
if (NULL != pfsMenuInfo)
{
LoadString(HINST_THISDLL, idMove + IDS_DD_FIRST, szCmd, ARRAYSIZE(szCmd));
mii.fState = MFS_ENABLED | ((DROPEFFECT_MOVE == dwDefEffect) ? MFS_DEFAULT : 0);
mii.wID = idMove;
mii.dwItemData = DROPEFFECT_MOVE;
InsertMenuItem(pfsMenuInfo->hMenu, pfsMenuInfo->uMovePos, TRUE, &mii);
pfsMenuInfo->uMovePos++;
pfsMenuInfo->uLinkPos++;
}
}
if ((DROPEFFECT_LINK == (DROPEFFECT_LINK & dwEffectAvail)) &&
((0 == (*pdwEffects & DROPEFFECT_LINK)) || (dwForceEffect & DROPEFFECT_LINK)))
{
ASSERT(0 != idLink);
if (NULL != pfsMenuInfo)
{
LoadString(HINST_THISDLL, idLink + IDS_DD_FIRST, szCmd, ARRAYSIZE(szCmd));
mii.fState = MFS_ENABLED | ((DROPEFFECT_LINK == dwDefEffect) ? MFS_DEFAULT : 0);
mii.wID = idLink;
mii.dwItemData = DROPEFFECT_LINK;
InsertMenuItem(pfsMenuInfo->hMenu, pfsMenuInfo->uLinkPos, TRUE, &mii);
pfsMenuInfo->uLinkPos++;
}
}
*pdwEffects |= dwEffectAvail;
}
// determine the default drop effect (move/copy/link) from the file type
//
// HKCR\.cda "DefaultDropEffect" = 4 // DROPEFFECT_LINK
DWORD EffectFromFileType(IDataObject *pdtobj)
{
DWORD dwDefEffect = DROPEFFECT_NONE; // 0
LPITEMIDLIST pidl;
if (SUCCEEDED(PidlFromDataObject(pdtobj, &pidl)))
{
IQueryAssociations *pqa;
if (SUCCEEDED(SHGetAssociations(pidl, (void **)&pqa)))
{
DWORD cb = sizeof(dwDefEffect);
pqa->GetData(0, ASSOCDATA_VALUE, L"DefaultDropEffect", &dwDefEffect, &cb);
pqa->Release();
}
ILFree(pidl);
}
return dwDefEffect;
}
// compute the default effect based on
// the allowed effects
// the keyboard state,
// the preferred effect that might be in the data object
// and previously computed default effect (if the above yields nothing)
DWORD CFSDropTarget::_GetDefaultEffect(DWORD grfKeyState, DWORD dwCurEffectAvail, DWORD dwAllEffectAvail, DWORD dwOrigDefEffect)
{
DWORD dwDefEffect = 0;
//
// keyboard, (explicit user input) gets first crack
//
switch (grfKeyState & (MK_CONTROL | MK_SHIFT | MK_ALT))
{
case MK_CONTROL:
dwDefEffect = DROPEFFECT_COPY;
break;
case MK_SHIFT:
dwDefEffect = DROPEFFECT_MOVE;
break;
case MK_SHIFT | MK_CONTROL:
case MK_ALT:
dwDefEffect = DROPEFFECT_LINK;
break;
default: // no modifier keys case
// if the data object contains a preferred drop effect, try to use it
DWORD dwPreferred = DataObj_GetDWORD(_pdtobj, g_cfPreferredDropEffect, DROPEFFECT_NONE) & dwAllEffectAvail;
if (DROPEFFECT_NONE == dwPreferred)
{
dwPreferred = EffectFromFileType(_pdtobj) & dwAllEffectAvail;
}
if (dwPreferred)
{
if (dwPreferred & DROPEFFECT_MOVE)
{
dwDefEffect = DROPEFFECT_MOVE;
}
else if (dwPreferred & DROPEFFECT_COPY)
{
dwDefEffect = DROPEFFECT_COPY;
}
else if (dwPreferred & DROPEFFECT_LINK)
{
dwDefEffect = DROPEFFECT_LINK;
}
}
else
{
dwDefEffect = dwOrigDefEffect;
}
break;
}
return dwDefEffect & dwCurEffectAvail;
}
HRESULT CFSDropTarget::_FilterDeskCompHDROP(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
HRESULT hr = S_FALSE;
if (!PolicyNoActiveDesktop() &&
!SHRestricted(REST_NOADDDESKCOMP) &&
_IsDesktopFolder())
{
hr = IsDeskCompHDrop(_pdtobj);
if (S_OK == hr)
{
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = dwEffectsAvail & DROPEFFECT_LINK;
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, DROPEFFECT_LINK);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect, 0, 0, DDIDM_CONTENTS_DESKCOMP,
DROPEFFECT_LINK, // force add the DDIDM_CONTENTS_DESKCOMP verb
pfsMenuInfo);
}
}
return hr;
}
// see if a PIDL is scoped by a briefcaes
BOOL IsBriefcaseOrChild(LPCITEMIDLIST pidlIn)
{
BOOL bRet = FALSE;
LPITEMIDLIST pidl = ILClone(pidlIn);
if (pidl)
{
do
{
CLSID clsid;
if (SUCCEEDED(GetCLSIDFromIDList(pidl, &clsid)) &&
IsEqualCLSID(clsid, CLSID_Briefcase))
{
bRet = TRUE; // it is a briefcase
break;
}
} while (ILRemoveLastID(pidl));
ILFree(pidl);
}
return bRet;
}
// returns true if the data object represents items in a sneakernet briefcase
// (briefcase on removable media)
BOOL CFSDropTarget::_IsFromSneakernetBriefcase()
{
BOOL bRet = FALSE; // assume no
if (!_IsBriefcaseTarget())
{
STGMEDIUM medium = {0};
LPIDA pida = DataObj_GetHIDA(_pdtobj, &medium);
if (pida)
{
LPCITEMIDLIST pidlFolder = IDA_GetIDListPtr(pida, (UINT)-1);
TCHAR szSource[MAX_PATH];
if (SHGetPathFromIDList(pidlFolder, szSource))
{
// is source on removable device?
if (!PathIsUNC(szSource) && IsRemovableDrive(DRIVEID(szSource)))
{
TCHAR szTarget[MAX_PATH];
_GetPath(szTarget);
// is the target fixed media?
if (PathIsUNC(szTarget) || !IsRemovableDrive(DRIVEID(szTarget)))
{
bRet = IsBriefcaseOrChild(pidlFolder);
}
}
}
HIDA_ReleaseStgMedium(pida, &medium);
}
}
return bRet;
}
// TRUE if any folders are in hdrop
BOOL DroppingAnyFolders(HDROP hDrop)
{
TCHAR szPath[MAX_PATH];
for (UINT i = 0; DragQueryFile(hDrop, i, szPath, ARRAYSIZE(szPath)); i++)
{
if (PathIsDirectory(szPath))
return TRUE;
}
return FALSE;
}
// sneakernet case:
// dragging a file/folder from a briefcase on removable media. we special case this
// and use this as a chance to connect up this target folder with the content of the briefcase
HRESULT CFSDropTarget::_FilterSneakernetBriefcase(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
if (_IsFromSneakernetBriefcase())
{
// Yes; show the non-default briefcase cm
STGMEDIUM medium = {0};
FORMATETC fmte = {CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
if (SUCCEEDED(_pdtobj->GetData(&fmte, &medium)))
{
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = DROPEFFECT_COPY & dwEffectsAvail;
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, DROPEFFECT_COPY);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect, DDIDM_SYNCCOPY, 0, 0, 0, pfsMenuInfo);
// Call _AddVerbs() again to force "Sync Copy of Type" as a 2nd DROPEFFECT_COPY verb:
if ((DROPEFFECT_COPY & dwEffectsAvail) &&
DroppingAnyFolders((HDROP)medium.hGlobal))
{
_AddVerbs(pdwEffects, DROPEFFECT_COPY, 0,
DDIDM_SYNCCOPYTYPE, 0, 0, DROPEFFECT_COPY, pfsMenuInfo);
}
ReleaseStgMedium(&medium);
}
}
return S_OK;
}
// returns true if the data object represents items from the same briefcase
// as this drop target
BOOL CFSDropTarget::_IsFromSameBriefcase()
{
BOOL bRet = FALSE;
STGMEDIUM medium;
FORMATETC fmteBrief = {g_cfBriefObj, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
// Yes; are they from the same briefcase as the target?
if (SUCCEEDED(_pdtobj->GetData(&fmteBrief, &medium)))
{
BriefObj *pbo = (BriefObj *)GlobalLock(medium.hGlobal);
TCHAR szBriefPath[MAX_PATH], szPath[MAX_PATH];
lstrcpy(szBriefPath, BOBriefcasePath(pbo));
lstrcpy(szPath, BOFileList(pbo)); // first file in list
TCHAR szPathTgt[MAX_PATH];
_GetPath(szPathTgt);
int cch = PathCommonPrefix(szPath, szPathTgt, NULL);
bRet = (0 < cch) && (lstrlen(szBriefPath) <= cch);
GlobalUnlock(medium.hGlobal);
ReleaseStgMedium(&medium);
}
return bRet;
}
// briefcase drop target specific handling gets computed here
HRESULT CFSDropTarget::_FilterBriefcase(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
if (_IsBriefcaseTarget() && !_IsFromSameBriefcase())
{
STGMEDIUM medium = {0};
FORMATETC fmte = {CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
if (SUCCEEDED(_pdtobj->GetData(&fmte, &medium)))
{
DWORD dwDefEffect = DROPEFFECT_COPY;
DWORD dwEffectAdd = DROPEFFECT_COPY & dwEffectsAvail;
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, DROPEFFECT_COPY);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect, DDIDM_SYNCCOPY, 0, 0, 0, pfsMenuInfo);
// Call _AddVerbs() again to force "Sync Copy of Type" as a 2nd DROPEFFECT_COPY verb:
if ((DROPEFFECT_COPY & dwEffectsAvail) &&
DroppingAnyFolders((HDROP)medium.hGlobal))
{
_AddVerbs(pdwEffects, DROPEFFECT_COPY, 0,
DDIDM_SYNCCOPYTYPE, 0, 0, DROPEFFECT_COPY, pfsMenuInfo);
}
ReleaseStgMedium(&medium);
}
}
return S_OK;
}
HRESULT CFSDropTarget::_FilterHDROP(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = dwEffectsAvail & (DROPEFFECT_COPY | DROPEFFECT_MOVE);
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, _FilesystemAdjustedDefaultEffect(dwEffectAdd));
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect, DDIDM_COPY, DDIDM_MOVE, 0, 0, pfsMenuInfo);
return S_OK;
}
HRESULT CFSDropTarget::_FilterFileContents(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
if ((_dwData & (DTID_CONTENTS | DTID_FDESCA)) == (DTID_CONTENTS | DTID_FDESCA) ||
(_dwData & (DTID_CONTENTS | DTID_FDESCW)) == (DTID_CONTENTS | DTID_FDESCW))
{
DWORD dwEffectAdd, dwSuggestedEffect;
//
// HACK: if there is a preferred drop effect and no HIDA
// then just take the preferred effect as the available effects
// this is because we didn't actually check the FD_LINKUI bit
// back when we assembled dwData! (performance)
//
if ((_dwData & (DTID_PREFERREDEFFECT | DTID_HIDA)) == DTID_PREFERREDEFFECT)
{
dwEffectAdd = _dwEffectPreferred;
dwSuggestedEffect = _dwEffectPreferred;
}
else if (_dwData & DTID_FD_LINKUI)
{
dwEffectAdd = DROPEFFECT_LINK;
dwSuggestedEffect = DROPEFFECT_LINK;
}
else
{
dwEffectAdd = DROPEFFECT_COPY | DROPEFFECT_MOVE;
dwSuggestedEffect = DROPEFFECT_COPY;
}
dwEffectAdd &= dwEffectsAvail;
DWORD dwDefEffect = 0;
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, dwSuggestedEffect);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect,
DDIDM_CONTENTS_COPY, DDIDM_CONTENTS_MOVE, DDIDM_CONTENTS_LINK,
0, pfsMenuInfo);
}
return S_OK;
}
//
// Old versions of OLE have a bug where if two FORMATETCs use the same
// CLIPFORMAT, then only the first one makes it to the IEnumFORMATETC,
// even if the other parameters (such as DVASPECT) are different.
//
// This causes us problems because those other DVASPECTs might be useful.
// So if we see a FileContents with the wrong DVASPECT, sniff at the
// object to see if maybe it also contains a copy with the correct DVASPECT.
//
// This bug was fixed in 1996 on the NT side, but the Win9x side was
// not fixed. The Win9x OLE team was disbanded before the fix could
// be propagated. So we get to work around this OLE bug forever.
//
HRESULT CFSDropTarget::_FilterFileContentsOLEHack(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
FORMATETC fmte = *pfmte;
fmte.dwAspect = DVASPECT_CONTENT;
//
// Whoa, this test is so (intentionally) backwards it isn't funny.
//
// We want to see whether there is a DVASPECT_CONTENT available in
// the real object. So we first ask the object if it has a
// DVASPECT_CONTENT format already. If the answer is yes, then we
// **skip** this FORMATETC, because it will be found (or has already
// been found) by our big EnumFORMATETC loop.
//
// If the answer is NO, then maybe we're hitting an OLE bug.
// (They cache the list of available formats, but the bug is that
// their cache is broken.) Bypass the cache by actually getting the
// data. If it works, then run with it. Otherwise, I guess OLE wasn't
// kidding.
//
// Note that we do not GetData() unconditionally -- bad for perf.
// Only call GetData() after all the easy tests have failed.
//
HRESULT hr = _pdtobj->QueryGetData(&fmte);
if (hr == DV_E_FORMATETC)
{
// Maybe we are hitting the OLE bug. Try harder.
STGMEDIUM stgm = {0};
if (SUCCEEDED(_pdtobj->GetData(&fmte, &stgm)))
{
// Yup. OLE lied to us.
ReleaseStgMedium(&stgm);
hr = _FilterFileContents(&fmte, grfKeyFlags, dwEffectsAvail,
pdwEffects, pdwDefaultEffect, pfsMenuInfo);
}
else
{
// Whaddya know, OLE was telling the truth. Do nothing with this
// format.
hr = S_OK;
}
}
else
{
// Either QueryGetData() failed in some bizarre way
// (in which case we ignore the problem) or the QueryGetData
// succeeded, in which case we ignore this FORMATETC since
// the big enumeration will find (or has already found) the
// DVASPECT_CONTENT.
hr = S_OK;
}
return hr;
}
HRESULT CFSDropTarget::_FilterHIDA(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = DROPEFFECT_LINK & dwEffectsAvail;
// NOTE: we only add a HIDA default effect if HDROP isn't going to add a default
// effect. This preserves shell behavior with file system data objects without
// requiring us to change the enumerator order in CIDLDataObj. When we do change
// the enumerator order, we can remove this special case:
if (pdwDefaultEffect &&
((0 == (_dwData & DTID_HDROP)) ||
(0 == _GetDefaultEffect(grfKeyFlags,
dwEffectsAvail & (DROPEFFECT_COPY | DROPEFFECT_MOVE),
dwEffectsAvail,
_FilesystemAdjustedDefaultEffect(dwEffectsAvail & (DROPEFFECT_COPY | DROPEFFECT_MOVE))))))
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, DROPEFFECT_LINK);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect, 0, 0, DDIDM_LINK, 0, pfsMenuInfo);
return S_OK;
}
// {F20DA720-C02F-11CE-927B-0800095AE340}
const GUID CLSID_CPackage = {0xF20DA720L, 0xC02F, 0x11CE, 0x92, 0x7B, 0x08, 0x00, 0x09, 0x5A, 0xE3, 0x40};
// old packager guid...
// {0003000C-0000-0000-C000-000000000046}
const GUID CLSID_OldPackage = {0x0003000CL, 0x0000, 0x0000, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46};
HRESULT CFSDropTarget::_FilterOlePackage(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
HRESULT hr = S_FALSE;
if (pdwDefaultEffect)
{
*pdwDefaultEffect = 0;
}
FORMATETC fmte = {g_cfObjectDescriptor, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM medium = {0};
if (SUCCEEDED(_pdtobj->GetData(&fmte, &medium)))
{
// we've got an object descriptor
OBJECTDESCRIPTOR* pOD = (OBJECTDESCRIPTOR*) GlobalLock(medium.hGlobal);
if (pOD)
{
if (IsEqualCLSID(CLSID_OldPackage, pOD->clsid) ||
IsEqualCLSID(CLSID_CPackage, pOD->clsid))
{
// This is a package - proceed
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = (DROPEFFECT_COPY | DROPEFFECT_MOVE) & dwEffectsAvail;
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, DROPEFFECT_COPY);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect,
DDIDM_OBJECT_COPY, DDIDM_OBJECT_MOVE, 0,
0, pfsMenuInfo);
hr = S_OK;
}
GlobalUnlock(medium.hGlobal);
}
ReleaseStgMedium(&medium);
}
return hr;
}
// REARCHITECT:
// This code has lots of problems. We need to fix this the text time we touch this code
// outside of ship mode. TO FIX:
// 1. Use SHAnsiToUnicode(CP_UTF8, ) to convert pszHTML to unicode. This will allow international
// paths to work.
// 2. Obey the selected range.
// 3. Use MSHTML to get the image. You can have trident parse the HTML via IHTMLTxtRange::pasteHTML.
// MS HTML has a special collection of images. Ask for the first image in that collection, or
// the first image in that collection within the selected range. (#1 isn't needed with this)
BOOL ExtractImageURLFromCFHTML(IN LPSTR pszHTML, IN SIZE_T cbHTMLSize, OUT LPSTR szImg, IN DWORD dwSize)
{
BOOL fSucceeded = FALSE;
// To avoid going nuts, only look at the first 64K of the HTML.
// (Important on Win64 because StrCpyNA doesn't support more than 4GB.)
if (cbHTMLSize > 0xFFFF)
cbHTMLSize = 0xFFFF;
// NT #391669: pszHTML isn't terminated, so terminate it now.
LPSTR pszCopiedHTML = (LPSTR) LocalAlloc(LPTR, cbHTMLSize + 1);
if (pszCopiedHTML)
{
LPSTR szTemp;
DWORD dwLen = dwSize;
BOOL bRet = TRUE;
StrCpyNA(pszCopiedHTML, pszHTML, (int)(cbHTMLSize + 1));
//DANGER WILL ROBINSON:
// HTML is comming in as UFT-8 encoded. Neither Unicode or Ansi,
// We've got to do something.... I'm going to party on it as if it were
// Ansi. This code will choke on escape sequences.....
//Find the base URL
//Locate <!--StartFragment-->
//Read the <IMG SRC="
//From there to the "> should be the Image URL
//Determine if it's an absolute or relative URL
//If relative, append to BASE url. You may need to lop off from the
// last delimiter to the end of the string.
//Pull out the SourceURL
LPSTR szBase = StrStrIA(pszCopiedHTML,"SourceURL:"); // Point to the char after :
if (szBase)
{
szBase += sizeof("SourceURL:")-1;
//Since each line can be terminated by a CR, CR/LF or LF check each case...
szTemp = StrChrA(szBase,'\n');
if (!szTemp)
szTemp = StrChrA(szBase,'\r');
if (szTemp)
*szTemp = '\0';
szTemp++;
}
else
szTemp = pszCopiedHTML;
//Pull out the Img Src
LPSTR pszImgSrc = StrStrIA(szTemp,"IMG");
if (pszImgSrc != NULL)
{
pszImgSrc = StrStrIA(pszImgSrc,"SRC");
if (pszImgSrc != NULL)
{
LPSTR pszImgSrcOrig = pszImgSrc;
pszImgSrc = StrChrA(pszImgSrc,'\"');
if (pszImgSrc)
{
pszImgSrc++; // Skip over the quote at the beginning of the src path.
szTemp = StrChrA(pszImgSrc,'\"'); // Find the end of the path.
}
else
{
LPSTR pszTemp1;
LPSTR pszTemp2;
pszImgSrc = StrChrA(pszImgSrcOrig,'=');
pszImgSrc++; // Skip past the equals to the first char in the path.
// Someday we may need to handle spaces between '=' and the path.
pszTemp1 = StrChrA(pszImgSrc,' '); // Since the path doesn't have quotes around it, assume a space will terminate it.
pszTemp2 = StrChrA(pszImgSrc,'>'); // Since the path doesn't have quotes around it, assume a space will terminate it.
szTemp = pszTemp1; // Assume quote terminates path.
if (!pszTemp1)
szTemp = pszTemp2; // Use '>' if quote not found.
if (pszTemp1 && pszTemp2 && (pszTemp2 < pszTemp1))
szTemp = pszTemp2; // Change to having '>' terminate path if both exist and it comes first.
}
*szTemp = '\0'; // Terminate path.
//At this point, I've reduced the 2 important strings. Now see if I need to
//Join them.
//If this fails, then we don't have a full URL, Only a relative.
if (!UrlIsA(pszImgSrc,URLIS_URL) && szBase)
{
if (SUCCEEDED(UrlCombineA(szBase, pszImgSrc, szImg, &dwLen,0)))
fSucceeded = TRUE;
}
else
{
if (lstrlenA(pszImgSrc) <= (int)dwSize)
lstrcpyA(szImg, pszImgSrc);
fSucceeded = TRUE;
}
}
}
LocalFree(pszCopiedHTML);
}
return fSucceeded;
}
HRESULT CFSDropTarget::_FilterDeskImage(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
HRESULT hr = S_FALSE;
if (pdwDefaultEffect)
{
*pdwDefaultEffect = 0;
}
if (!PolicyNoActiveDesktop() &&
!SHRestricted(REST_NOADDDESKCOMP) &&
_IsDesktopFolder())
{
FORMATETC fmte = {g_cfHTML, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM medium = {0};
if (SUCCEEDED(_pdtobj->GetData(&fmte, &medium)))
{
//DANGER WILL ROBINSON:
//HTML is UTF-8, a mostly ANSI cross of ANSI and Unicode. Play with
// it as is it were ANSI. Find a way to escape the sequences...
CHAR *pszData = (CHAR*) GlobalLock(medium.hGlobal);
if (pszData)
{
CHAR szUrl[MAX_URL_STRING];
if (ExtractImageURLFromCFHTML(pszData, GlobalSize(medium.hGlobal), szUrl, ARRAYSIZE(szUrl)))
{
// The HTML contains an image tag - carry on...
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = DROPEFFECT_LINK; // NOTE: ignoring dwEffectsAvail!
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd,
dwEffectsAvail | DROPEFFECT_LINK, DROPEFFECT_LINK);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect,
0, 0, DDIDM_CONTENTS_DESKIMG,
0, pfsMenuInfo);
hr = S_OK;
}
GlobalUnlock(medium.hGlobal);
}
ReleaseStgMedium(&medium);
}
}
return hr;
}
HRESULT CFSDropTarget::_FilterDeskComp(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
HRESULT hr = S_FALSE;
if (pdwDefaultEffect)
{
*pdwDefaultEffect = 0;
}
if (!PolicyNoActiveDesktop() &&
!SHRestricted(REST_NOADDDESKCOMP) &&
_IsDesktopFolder())
{
FORMATETC fmte = {g_cfShellURL, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM medium = {0};
if (SUCCEEDED(_pdtobj->GetData(&fmte, &medium)))
{
// DANGER WILL ROBINSON:
// HTML is UTF-8, a mostly ANSI cross of ANSI and Unicode. Play with
// it as is it were ANSI. Find a way to escape the sequences...
CHAR *pszData = (CHAR*) GlobalLock(medium.hGlobal);
if (pszData)
{
int nScheme = GetUrlSchemeA(pszData);
if ((nScheme != URL_SCHEME_INVALID) && (nScheme != URL_SCHEME_FTP))
{
// This is an internet scheme - carry on...
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = DROPEFFECT_LINK & dwEffectsAvail;
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, DROPEFFECT_LINK);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect,
0, 0, DDIDM_CONTENTS_DESKURL,
DROPEFFECT_LINK, // force add this verb
pfsMenuInfo);
hr = S_OK;
}
GlobalUnlock(medium.hGlobal);
}
ReleaseStgMedium(&medium);
}
}
return hr;
}
HRESULT CFSDropTarget::_FilterOleObj(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
HRESULT hr = S_FALSE;
if (_dwData & DTID_OLEOBJ)
{
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = (DROPEFFECT_COPY | DROPEFFECT_MOVE) & dwEffectsAvail;
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, DROPEFFECT_COPY);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect, DDIDM_SCRAP_COPY, DDIDM_SCRAP_MOVE, 0, 0, pfsMenuInfo);
hr = S_OK;
}
return hr;
}
HRESULT CFSDropTarget::_FilterOleLink(FORMATETC* pfmte, DWORD grfKeyFlags, DWORD dwEffectsAvail,
DWORD* pdwEffects, DWORD* pdwDefaultEffect, FSMENUINFO* pfsMenuInfo)
{
ASSERT(pdwEffects);
HRESULT hr = S_FALSE;
if (_dwData & DTID_OLELINK)
{
DWORD dwDefEffect = 0;
DWORD dwEffectAdd = DROPEFFECT_LINK & dwEffectsAvail;
if (pdwDefaultEffect)
{
dwDefEffect = _GetDefaultEffect(grfKeyFlags, dwEffectAdd, dwEffectsAvail, DROPEFFECT_LINK);
*pdwDefaultEffect = dwDefEffect;
}
_AddVerbs(pdwEffects, dwEffectAdd, dwDefEffect, 0, 0, DDIDM_DOCLINK, 0, pfsMenuInfo);
hr = S_OK;
}
return hr;
}
HRESULT CFSDropTarget::_CreateURLDeskComp(IDataObject *pdtobj, POINTL pt)
{
// This code should only be entered if DDIDM_CONTENTS_DESKURL was added to the menu,
// and it has these checks:
ASSERT(!PolicyNoActiveDesktop() &&
!SHRestricted(REST_NOADDDESKCOMP) &&
_IsDesktopFolder());
STGMEDIUM medium = {0};
FORMATETC fmte = {g_cfShellURL, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
HRESULT hr = pdtobj->GetData(&fmte, &medium);
if (SUCCEEDED(hr))
{
//DANGER WILL ROBINSON:
//HTML is UTF-8, a mostly ANSI cross of ANSI and Unicode. Play with
// it as is it were ANSI. Find a way to escape the sequences...
CHAR *pszData = (CHAR*) GlobalLock(medium.hGlobal);
if (pszData)
{
int nScheme = GetUrlSchemeA(pszData);
if ((nScheme != URL_SCHEME_INVALID) && (nScheme != URL_SCHEME_FTP))
{
// This is an internet scheme - URL
hr = CreateDesktopComponents(pszData, NULL, _hwnd, DESKCOMP_URL, pt.x, pt.y);
}
GlobalUnlock(medium.hGlobal);
}
else
{
hr = E_FAIL;
}
ReleaseStgMedium(&medium);
}
return hr;
}
HRESULT CFSDropTarget::_CreateDeskCompImage(IDataObject *pdtobj, POINTL pt)
{
ASSERT(!PolicyNoActiveDesktop() &&
!SHRestricted(REST_NOADDDESKCOMP) &&
_IsDesktopFolder());
FORMATETC fmte = {g_cfHTML, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM medium = {0};
HRESULT hr = pdtobj->GetData(&fmte, &medium);
if (SUCCEEDED(hr))
{
//DANGER WILL ROBINSON:
//HTML is UTF-8, a mostly ANSI cross of ANSI and Unicode. Play with
// it as is it were ANSI. Find a way to escape the sequences...
CHAR *pszData = (CHAR*) GlobalLock(medium.hGlobal);
if (pszData)
{
CHAR szUrl[MAX_URL_STRING];
if (ExtractImageURLFromCFHTML(pszData, GlobalSize(medium.hGlobal), szUrl, ARRAYSIZE(szUrl)))
{
// The HTML contains an image tag - carry on...
ADDTODESKTOP *pToAD;
hr = SHLocalAlloc(sizeof(*pToAD), &pToAD);
if (SUCCEEDED(hr))
{
pToAD->hwnd = _hwnd;
lstrcpyA(pToAD->szUrl, szUrl);
pToAD->dwFlags = DESKCOMP_IMAGE;
pToAD->pt = pt;
if (SHCreateThread(AddToActiveDesktopThreadProc, pToAD, CTF_COINIT, NULL))
{
hr = S_OK;
}
else
{
LocalFree(pToAD);
hr = E_OUTOFMEMORY;
}
}
}
else
{
hr = E_FAIL;
}
GlobalUnlock(medium.hGlobal);
}
else
hr = E_FAIL;
ReleaseStgMedium(&medium);
}
return hr;
}
//
// read byte by byte until we hit the null terminating char
// return: the number of bytes read
//
HRESULT StringReadFromStream(IStream* pstm, LPSTR pszBuf, UINT cchBuf)
{
UINT cch = 0;
do {
pstm->Read(pszBuf, sizeof(CHAR), NULL);
cch++;
} while (*pszBuf++ && cch <= cchBuf);
return cch;
}
HRESULT CopyStreamToFile(IStream* pstmSrc, LPCTSTR pszFile, ULONGLONG ullFileSize)
{
IStream *pstmFile;
HRESULT hr = SHCreateStreamOnFile(pszFile, STGM_CREATE | STGM_WRITE | STGM_SHARE_DENY_WRITE, &pstmFile);
if (SUCCEEDED(hr))
{
hr = CopyStreamUI(pstmSrc, pstmFile, NULL, ullFileSize);
pstmFile->Release();
}
return hr;
}
HRESULT CFSDropTarget::_CreatePackage(IDataObject *pdtobj)
{
ILockBytes* pLockBytes;
HRESULT hr = CreateILockBytesOnHGlobal(NULL, TRUE, &pLockBytes);
if (SUCCEEDED(hr))
{
STGMEDIUM medium;
medium.tymed = TYMED_ISTORAGE;
hr = StgCreateDocfileOnILockBytes(pLockBytes,
STGM_DIRECT | STGM_READWRITE | STGM_CREATE |
STGM_SHARE_EXCLUSIVE, 0, &medium.pstg);
if (SUCCEEDED(hr))
{
FORMATETC fmte = {g_cfEmbeddedObject, NULL, DVASPECT_CONTENT, -1, TYMED_ISTORAGE};
hr = pdtobj->GetDataHere(&fmte, &medium);
if (SUCCEEDED(hr))
{
IStream* pstm;
#ifdef DEBUG
STATSTG stat;
if (SUCCEEDED(medium.pstg->Stat(&stat, STATFLAG_NONAME)))
{
ASSERT(IsEqualCLSID(CLSID_OldPackage, stat.clsid) ||
IsEqualCLSID(CLSID_CPackage, stat.clsid));
}
#endif // DEBUG
#define PACKAGER_ICON 2
#define PACKAGER_CONTENTS L"\001Ole10Native"
#define PACKAGER_EMBED_TYPE 3
hr = medium.pstg->OpenStream(PACKAGER_CONTENTS, 0,
STGM_DIRECT | STGM_READWRITE | STGM_SHARE_EXCLUSIVE,
0, &pstm);
if (SUCCEEDED(hr))
{
DWORD dw;
WORD w;
CHAR szName[MAX_PATH];
CHAR szTemp[MAX_PATH];
if (SUCCEEDED(pstm->Read(&dw, sizeof(dw), NULL)) && // pkg size
SUCCEEDED(pstm->Read(&w, sizeof(w), NULL)) && // pkg appearance
(PACKAGER_ICON == w) &&
SUCCEEDED(StringReadFromStream(pstm, szName, ARRAYSIZE(szName))) &&
SUCCEEDED(StringReadFromStream(pstm, szTemp, ARRAYSIZE(szTemp))) && // icon path
SUCCEEDED(pstm->Read(&w, sizeof(w), NULL)) && // icon index
SUCCEEDED(pstm->Read(&w, sizeof(w), NULL)) && // panetype
(PACKAGER_EMBED_TYPE == w) &&
SUCCEEDED(pstm->Read(&dw, sizeof(dw), NULL)) && // filename size
SUCCEEDED(pstm->Read(szTemp, dw, NULL)) && // filename
SUCCEEDED(pstm->Read(&dw, sizeof(dw), NULL))) // get file size
{
// The rest of the stream is the file contents
TCHAR szPath[MAX_PATH], szBase[MAX_PATH], szDest[MAX_PATH];
_GetPath(szPath);
SHAnsiToTChar(szName, szBase, ARRAYSIZE(szBase));
PathAppend(szPath, szBase);
PathYetAnotherMakeUniqueName(szDest, szPath, NULL, szBase);
TraceMsg(TF_GENERAL, "CFSIDLDropTarget pkg: %s", szDest);
hr = CopyStreamToFile(pstm, szDest, dw);
if (SUCCEEDED(hr))
{
SHChangeNotify(SHCNE_CREATE, SHCNF_PATH, szDest, NULL);
if (_fBkDropTarget && _hwnd)
{
PositionFileFromDrop(_hwnd, szDest, NULL);
}
}
}
else
{
hr = E_UNEXPECTED;
}
pstm->Release();
}
}
medium.pstg->Release();
}
pLockBytes->Release();
}
return hr;
}
HRESULT CFSDropTarget::_GetPath(LPTSTR pszPath)
{
return _pFolder->_GetPath(pszPath);
}
LPCITEMIDLIST CFSDropTarget::_GetIDList()
{
return _pFolder->_GetIDList();
}
DWORD CFSDropTarget::_EffectFromFolder()
{
if (-1 == _dwEffectFolder)
{
_dwEffectFolder = DROPEFFECT_NONE; // re-set to nothing (0)
TCHAR szPath[MAX_PATH];
// add a simple pathisroot check here to prevent it from hitting the disk (mostly floppy)
// when we want the dropeffect probe to be fast (sendto, hovering over drives in view).
// its not likely that we'll want to modify the root's drop effect, and this still allows
// dropeffect modification on floppy subfolders.
if (SUCCEEDED(_GetPath(szPath)) && !PathIsRoot(szPath) && PathAppend(szPath, TEXT("desktop.ini")))
{
_dwEffectFolder = GetPrivateProfileInt(STRINI_CLASSINFO, TEXT("DefaultDropEffect"), 0, szPath);
}
}
return _dwEffectFolder;
}
BOOL AllRegisteredPrograms(HDROP hDrop)
{
TCHAR szPath[MAX_PATH];
for (UINT i = 0; DragQueryFile(hDrop, i, szPath, ARRAYSIZE(szPath)); i++)
{
if (!PathIsRegisteredProgram(szPath))
return FALSE;
}
return TRUE;
}
BOOL IsBriefcaseRoot(IDataObject *pdtobj)
{
BOOL bRet = FALSE;
STGMEDIUM medium;
LPIDA pida = DataObj_GetHIDA(pdtobj, &medium);
if (pida)
{
// Is there a briefcase root in this pdtobj?
IShellFolder2 *psf;
if (SUCCEEDED(SHBindToObject(NULL, IID_X_PPV_ARG(IShellFolder2, IDA_GetIDListPtr(pida, (UINT)-1), &psf))))
{
for (UINT i = 0; i < pida->cidl; i++)
{
CLSID clsid;
bRet = SUCCEEDED(GetItemCLSID(psf, IDA_GetIDListPtr(pida, i), &clsid)) &&
IsEqualCLSID(clsid, CLSID_Briefcase);
if (bRet)
break;
}
psf->Release();
}
HIDA_ReleaseStgMedium(pida, &medium);
}
return bRet;
}
//
// the "default effect" defines what will be choosen out of the allowed effects
//
// If the data object does NOT contain HDROP -> "none"
// else if the source data object has a default drop effect folder list (maybe based on sub folderness)
// else if the source is root or registered progam -> "link"
// else if this is within a volume -> "move"
// else if this is a briefcase -> "move"
// else -> "copy"
//
DWORD CFSDropTarget::_FilesystemAdjustedDefaultEffect(DWORD dwCurEffectAvail)
{
DWORD dwDefEffect = DROPEFFECT_NONE;
FORMATETC fmte = {CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM medium = {0};
if (SUCCEEDED(_pdtobj->GetData(&fmte, &medium)))
{
TCHAR szPath[MAX_PATH];
DragQueryFile((HDROP) medium.hGlobal, 0, szPath, ARRAYSIZE(szPath)); // focused item
// DROPEFFECTFOLDERLIST allows the source of the data
// to specify the desired drop effect for items under
// certain parts of the name space.
//
// cd-burning does this to avoid the default move/copy computation
// that would kick in for cross volume CD burning/staging area transfers
FORMATETC fmteDropFolders = {g_cfDropEffectFolderList, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM mediumDropFolders = {0};
if (SUCCEEDED(_pdtobj->GetData(&fmteDropFolders, &mediumDropFolders)))
{
DROPEFFECTFOLDERLIST *pdefl = (DROPEFFECTFOLDERLIST*)GlobalLock(mediumDropFolders.hGlobal);
if (pdefl)
{
// get the default effect from the list -- in the staging area case this is DROPEFFECT_COPY
// so its a copy even if the staging area and source are on the same volume.
dwDefEffect = pdefl->dwDefaultDropEffect;
for (INT i = 0; i < pdefl->cFolders; i++)
{
// some folders are excluded, for example if you move a file from one part of the staging
// area to another we override (to DROPEFFECT_MOVE in this case).
if (PathIsEqualOrSubFolder(pdefl->aFolders[i].wszPath, szPath))
{
dwDefEffect = pdefl->aFolders[i].dwDropEffect;
break;
}
}
GlobalUnlock(pdefl);
}
ReleaseStgMedium(&mediumDropFolders);
}
if (DROPEFFECT_NONE == dwDefEffect)
{
dwDefEffect = _EffectFromFolder();
}
// If we didn't get a drop effect (==0) then lets fall back to the old checks
if (DROPEFFECT_NONE == dwDefEffect)
{
TCHAR szFolder[MAX_PATH];
_GetPath(szFolder);
// drive/UNC roots and installed programs get link
if (PathIsRoot(szPath) || AllRegisteredPrograms((HDROP)medium.hGlobal))
{
dwDefEffect = DROPEFFECT_LINK;
}
else if (PathIsSameRoot(szPath, szFolder))
{
dwDefEffect = DROPEFFECT_MOVE;
}
else if (IsBriefcaseRoot(_pdtobj))
{
// briefcase default to move even accross volumes
dwDefEffect = DROPEFFECT_MOVE;
}
else
{
dwDefEffect = DROPEFFECT_COPY;
}
}
ReleaseStgMedium(&medium);
}
else if (SUCCEEDED(_pdtobj->QueryGetData(&fmte)))
{
// but QueryGetData() succeeds!
// this means this data object has HDROP but can't
// provide it until it is dropped. Let's assume we are copying.
dwDefEffect = DROPEFFECT_COPY;
}
// Switch default verb if the dwCurEffectAvail hint suggests that we picked an
// unavailable effect (this code applies to MOVE and COPY only):
dwCurEffectAvail &= (DROPEFFECT_MOVE | DROPEFFECT_COPY);
if ((DROPEFFECT_MOVE == dwDefEffect) && (DROPEFFECT_COPY == dwCurEffectAvail))
{
// If we were going to return MOVE, and only COPY is available, return COPY:
dwDefEffect = DROPEFFECT_COPY;
}
else if ((DROPEFFECT_COPY == dwDefEffect) && (DROPEFFECT_MOVE == dwCurEffectAvail))
{
// If we were going to return COPY, and only MOVE is available, return MOVE:
dwDefEffect = DROPEFFECT_MOVE;
}
return dwDefEffect;
}
//
// make sure that the default effect is among the allowed effects
//
DWORD CFSDropTarget::_LimitDefaultEffect(DWORD dwDefEffect, DWORD dwEffectsAllowed)
{
if (dwDefEffect & dwEffectsAllowed)
return dwDefEffect;
if (dwEffectsAllowed & DROPEFFECT_COPY)
return DROPEFFECT_COPY;
if (dwEffectsAllowed & DROPEFFECT_MOVE)
return DROPEFFECT_MOVE;
if (dwEffectsAllowed & DROPEFFECT_LINK)
return DROPEFFECT_LINK;
return DROPEFFECT_NONE;
}
// Handy abbreviation
#define TYMED_ALLCONTENT (TYMED_HGLOBAL | TYMED_ISTREAM | TYMED_ISTORAGE)
// Use FSDH for registered clipboard formats (anything of the form g_cf*)
// Use _FSDH for predefined clipboard formats (like CF_HDROP or 0)
// Generate the _DATA_HANDLER array
#define FSDH(pfn, cf, dva, tymed) { { 0, NULL, dva, -1, tymed }, pfn, &cf }
#define _FSDH(pfn, cf, dva, tymed) { { (CLIPFORMAT)cf, NULL, dva, -1, tymed }, pfn, NULL }
// NOTE: the order is important (particularly for multiple entries with the same FORMATETC)
CFSDropTarget::_DATA_HANDLER
CFSDropTarget::rg_data_handlers[NUM_DATA_HANDLERS] = {
FSDH(_FilterFileContents, g_cfFileGroupDescriptorW, DVASPECT_CONTENT, TYMED_HGLOBAL),
FSDH(_FilterFileContentsOLEHack, g_cfFileGroupDescriptorW, DVASPECT_LINK, TYMED_HGLOBAL),
FSDH(_FilterFileContents, g_cfFileGroupDescriptorA, DVASPECT_CONTENT, TYMED_HGLOBAL),
FSDH(_FilterFileContentsOLEHack, g_cfFileGroupDescriptorA, DVASPECT_LINK, TYMED_HGLOBAL),
FSDH(_FilterFileContents, g_cfFileContents, DVASPECT_CONTENT, TYMED_ALLCONTENT),
FSDH(_FilterFileContentsOLEHack, g_cfFileContents, DVASPECT_LINK, TYMED_ALLCONTENT),
_FSDH(_FilterBriefcase, CF_HDROP, DVASPECT_CONTENT, TYMED_HGLOBAL),
_FSDH(_FilterSneakernetBriefcase, CF_HDROP, DVASPECT_CONTENT, TYMED_HGLOBAL),
_FSDH(_FilterHDROP, CF_HDROP, DVASPECT_CONTENT, TYMED_HGLOBAL),
_FSDH(_FilterDeskCompHDROP, CF_HDROP, DVASPECT_CONTENT, TYMED_HGLOBAL),
FSDH(_FilterHIDA, g_cfHIDA, DVASPECT_CONTENT, TYMED_HGLOBAL),
FSDH(_FilterOlePackage, g_cfEmbeddedObject, DVASPECT_CONTENT, TYMED_ISTORAGE),
FSDH(_FilterDeskImage, g_cfHTML, DVASPECT_CONTENT, TYMED_HGLOBAL),
FSDH(_FilterDeskComp, g_cfShellURL, DVASPECT_CONTENT, TYMED_HGLOBAL),
_FSDH(_FilterOleObj, 0, DVASPECT_CONTENT, TYMED_HGLOBAL),
_FSDH(_FilterOleLink, 0, DVASPECT_CONTENT, TYMED_HGLOBAL),
};
// Note that it's safe to race with another thread in this code
// since the function is idemponent. (Call it as many times as you
// like -- only the first time through actually does anything.)
void CFSDropTarget::_Init_rg_data_handlers()
{
for (int i = 0; i < ARRAYSIZE(rg_data_handlers); i++)
{
// If this assertion fires, then you have to change the value of
// NUM_DATA_HANDLERS to match the number of entries in the array
// definition.
ASSERT(rg_data_handlers[i].fmte.tymed);
if (rg_data_handlers[i].pcfInit)
{
rg_data_handlers[i].fmte.cfFormat = *rg_data_handlers[i].pcfInit;
}
}
}
//
// returns the default effect.
// also modifies *pdwEffectInOut to indicate "available" operations.
//
DWORD CFSDropTarget::_DetermineEffects(DWORD grfKeyState, DWORD *pdwEffectInOut, HMENU hmenu)
{
DWORD dwDefaultEffect = DROPEFFECT_NONE;
DWORD dwEffectsUsed = DROPEFFECT_NONE;
_Init_rg_data_handlers();
// Loop through formats, factoring in both the order of the enumerator and
// the order of our rg_data_handlers to determine the default effect
// (and possibly, to create the drop context menu)
FSMENUINFO fsmi = { hmenu, 0, 0, 0 };
IEnumFORMATETC *penum;
AssertMsg((NULL != _pdtobj), TEXT("CFSDropTarget::_DetermineEffects() _pdtobj is NULL but we need it. this=%#08lx"), this);
if (_pdtobj && SUCCEEDED(_pdtobj->EnumFormatEtc(DATADIR_GET, &penum)))
{
FORMATETC fmte;
ULONG celt;
while (penum->Next(1, &fmte, &celt) == S_OK)
{
for (int i = 0; i < ARRAYSIZE(rg_data_handlers); i++)
{
if (rg_data_handlers[i].fmte.cfFormat == fmte.cfFormat &&
rg_data_handlers[i].fmte.dwAspect == fmte.dwAspect &&
(rg_data_handlers[i].fmte.tymed & fmte.tymed))
{
// keep passing dwDefaultEffect until someone computes one, this
// lets the first guy that figures out the default be the default
(this->*(rg_data_handlers[i].pfnGetDragDropInfo))(
&fmte, grfKeyState, *pdwEffectInOut, &dwEffectsUsed,
(DROPEFFECT_NONE == dwDefaultEffect) ? &dwDefaultEffect : NULL,
hmenu ? &fsmi : NULL);
}
}
SHFree(fmte.ptd);
}
penum->Release();
}
// Loop through the rg_data_handlers that don't have an associated clipboard format last
for (int i = 0; i < ARRAYSIZE(rg_data_handlers); i++)
{
if (0 == rg_data_handlers[i].fmte.cfFormat)
{
// if default effect is still not computed continue to pass that
(this->*(rg_data_handlers[i].pfnGetDragDropInfo))(
NULL, grfKeyState, *pdwEffectInOut, &dwEffectsUsed,
(DROPEFFECT_NONE == dwDefaultEffect) ? &dwDefaultEffect : NULL,
hmenu ? &fsmi : NULL);
}
}
*pdwEffectInOut &= dwEffectsUsed;
dwDefaultEffect = _LimitDefaultEffect(dwDefaultEffect, *pdwEffectInOut);
DebugMsg(TF_FSTREE, TEXT("CFSDT::GetDefaultEffect dwDef=%x, dwEffUsed=%x, *pdw=%x"),
dwDefaultEffect, dwEffectsUsed, *pdwEffectInOut);
return dwDefaultEffect; // this is what we want to do
}
// This is used to map command id's back to dropeffect's:
const struct {
UINT uID;
DWORD dwEffect;
} c_IDFSEffects[] = {
DDIDM_COPY, DROPEFFECT_COPY,
DDIDM_MOVE, DROPEFFECT_MOVE,
DDIDM_CONTENTS_DESKCOMP, DROPEFFECT_LINK,
DDIDM_LINK, DROPEFFECT_LINK,
DDIDM_SCRAP_COPY, DROPEFFECT_COPY,
DDIDM_SCRAP_MOVE, DROPEFFECT_MOVE,
DDIDM_DOCLINK, DROPEFFECT_LINK,
DDIDM_CONTENTS_COPY, DROPEFFECT_COPY,
DDIDM_CONTENTS_MOVE, DROPEFFECT_MOVE,
DDIDM_CONTENTS_LINK, DROPEFFECT_LINK,
DDIDM_CONTENTS_DESKIMG, DROPEFFECT_LINK,
DDIDM_SYNCCOPYTYPE, DROPEFFECT_COPY, // (order is important)
DDIDM_SYNCCOPY, DROPEFFECT_COPY,
DDIDM_OBJECT_COPY, DROPEFFECT_COPY,
DDIDM_OBJECT_MOVE, DROPEFFECT_MOVE,
DDIDM_CONTENTS_DESKURL, DROPEFFECT_LINK,
};
void CFSDropTarget::_FixUpDefaultItem(HMENU hmenu, DWORD dwDefEffect)
{
// only do stuff if there is no default item already and we have a default effect
if ((GetMenuDefaultItem(hmenu, MF_BYPOSITION, 0) == -1) && dwDefEffect)
{
for (int i = 0; i < GetMenuItemCount(hmenu); i++)
{
// for menu item matching default effect, make it the default.
MENUITEMINFO mii = { 0 };
mii.cbSize = sizeof(mii);
mii.fMask = MIIM_DATA | MIIM_STATE;
if (GetMenuItemInfo(hmenu, i, MF_BYPOSITION, &mii) && (mii.dwItemData == dwDefEffect))
{
mii.fState |= MFS_DEFAULT;
SetMenuItemInfo(hmenu, i, MF_BYPOSITION, &mii);
break;
}
}
}
}
HRESULT CFSDropTarget::_DragDropMenu(FSDRAGDROPMENUPARAM *pddm)
{
HRESULT hr = E_OUTOFMEMORY; // assume error
DWORD dwEffectOut = 0; // assume no-ope.
if (pddm->hmenu)
{
UINT idCmd;
UINT idCmdFirst = DDIDM_EXTFIRST;
HDXA hdxa = HDXA_Create();
HDCA hdca = DCA_Create();
if (hdxa && hdca)
{
// Enumerate the DD handlers and let them append menu items.
for (DWORD i = 0; i < pddm->ck; i++)
{
DCA_AddItemsFromKey(hdca, pddm->rghk[i], STRREG_SHEX_DDHANDLER);
}
idCmdFirst = HDXA_AppendMenuItems(hdxa, pddm->pdtobj, pddm->ck,
pddm->rghk, _GetIDList(), pddm->hmenu, 0,
DDIDM_EXTFIRST, DDIDM_EXTLAST, 0, hdca);
}
// modifier keys held down to force operations that are not permitted (for example
// alt to force a shortcut from the start menu, which does not have SFGAO_CANLINK)
// can result in no default items on the context menu. however in displaying the
// cursor overlay in this case we fall back to DROPEFFECT_COPY. a left drag then
// tries to invoke the default menu item (user thinks its copy) but theres no default.
// this function selects a default menu item to match the default effect if there
// is no default item already.
_FixUpDefaultItem(pddm->hmenu, pddm->dwDefEffect);
// If this dragging is caused by the left button, simply choose
// the default one, otherwise, pop up the context menu. If there
// is no key state info and the original effect is the same as the
// current effect, choose the default one, otherwise pop up the
// context menu.
if ((_grfKeyStateLast & MK_LBUTTON) ||
(!_grfKeyStateLast && (*(pddm->pdwEffect) == pddm->dwDefEffect)))
{
idCmd = GetMenuDefaultItem(pddm->hmenu, MF_BYCOMMAND, 0);
// This one MUST be called here. Please read its comment block.
DAD_DragLeave();
if (_hwnd)
SetForegroundWindow(_hwnd);
}
else
{
// Note that SHTrackPopupMenu calls DAD_DragLeave().
idCmd = SHTrackPopupMenu(pddm->hmenu, TPM_RETURNCMD | TPM_RIGHTBUTTON | TPM_LEFTALIGN,
pddm->pt.x, pddm->pt.y, 0, _hwnd, NULL);
}
//
// We also need to call this here to release the dragged image.
//
DAD_SetDragImage(NULL, NULL);
//
// Check if the user selected one of add-in menu items.
//
if (idCmd == 0)
{
hr = S_OK; // Canceled by the user, return S_OK
}
else if (InRange(idCmd, DDIDM_EXTFIRST, DDIDM_EXTLAST))
{
//
// Yes. Let the context menu handler process it.
//
CMINVOKECOMMANDINFOEX ici = {
sizeof(CMINVOKECOMMANDINFOEX),
0L,
_hwnd,
(LPSTR)MAKEINTRESOURCE(idCmd - DDIDM_EXTFIRST),
NULL, NULL,
SW_NORMAL,
};
// record if the shift/control keys were down at the time of the drop
if (_grfKeyStateLast & MK_SHIFT)
{
ici.fMask |= CMIC_MASK_SHIFT_DOWN;
}
if (_grfKeyStateLast & MK_CONTROL)
{
ici.fMask |= CMIC_MASK_CONTROL_DOWN;
}
// We may not want to ignore the error code. (Can happen when you use the context menu
// to create new folders, but I don't know if that can happen here.).
HDXA_LetHandlerProcessCommandEx(hdxa, &ici, NULL);
hr = S_OK;
}
else
{
for (int nItem = 0; nItem < ARRAYSIZE(c_IDFSEffects); ++nItem)
{
if (idCmd == c_IDFSEffects[nItem].uID)
{
dwEffectOut = c_IDFSEffects[nItem].dwEffect;
break;
}
}
hr = S_FALSE;
}
if (hdca)
DCA_Destroy(hdca);
if (hdxa)
HDXA_Destroy(hdxa);
pddm->idCmd = idCmd;
}
*pddm->pdwEffect = dwEffectOut;
return hr;
}
void _MapName(void *hNameMap, LPTSTR pszPath)
{
if (hNameMap)
{
SHNAMEMAPPING *pNameMapping;
for (int i = 0; (pNameMapping = SHGetNameMappingPtr((HDSA)hNameMap, i)) != NULL; i++)
{
if (lstrcmpi(pszPath, pNameMapping->pszOldPath) == 0)
{
lstrcpy(pszPath, pNameMapping->pszNewPath);
break;
}
}
}
}
// convert double null list of files to array of pidls
int FileListToIDArray(LPCTSTR pszFiles, void *hNameMap, LPITEMIDLIST **pppidl)
{
int i = 0;
int nItems = CountFiles(pszFiles);
LPITEMIDLIST *ppidl = (LPITEMIDLIST *)LocalAlloc(LPTR, nItems * sizeof(*ppidl));
if (ppidl)
{
*pppidl = ppidl;
while (*pszFiles)
{
TCHAR szPath[MAX_PATH];
lstrcpy(szPath, pszFiles);
_MapName(hNameMap, szPath);
ppidl[i] = SHSimpleIDListFromPath(szPath);
pszFiles += lstrlen(pszFiles) + 1;
i++;
}
}
return i;
}
// move items to the new drop location
void CFSDropTarget::_MoveSelectIcons(IDataObject *pdtobj, IFolderView* pfv, void *hNameMap, LPCTSTR pszFiles, BOOL fMove, HDROP hDrop)
{
LPITEMIDLIST *ppidl = NULL;
int cidl;
if (pszFiles)
{
cidl = FileListToIDArray(pszFiles, hNameMap, &ppidl);
}
else
{
cidl = CreateMoveCopyList(hDrop, hNameMap, &ppidl);
}
if (ppidl)
{
if (pfv)
PositionItems(pfv, (LPCITEMIDLIST*)ppidl, cidl, pdtobj, fMove ? &_ptDrop : NULL);
FreeIDListArray(ppidl, cidl);
}
}
// this is the ILIsParent which matches up the desktop with the desktop directory.
BOOL AliasILIsParent(LPCITEMIDLIST pidl1, LPCITEMIDLIST pidl2)
{
LPITEMIDLIST pidlUse1 = SHLogILFromFSIL(pidl1);
if (pidlUse1)
pidl1 = pidlUse1;
LPITEMIDLIST pidlUse2 = SHLogILFromFSIL(pidl2);
if (pidlUse2)
pidl2 = pidlUse2;
BOOL fSame = ILIsParent(pidl1, pidl2, TRUE);
ILFree(pidlUse1); // NULL is OK here
ILFree(pidlUse2);
return fSame;
}
// in:
// pszDestDir destination dir for new file names
// pszDestSpecs double null list of destination specs
//
// returns:
// double null list of fully qualified destination file names to be freed
// with LocalFree()
//
LPTSTR RemapDestNamesW(LPCTSTR pszDestDir, LPCWSTR pszDestSpecs)
{
UINT cbDestSpec = lstrlen(pszDestDir) * sizeof(TCHAR) + sizeof(TCHAR);
LPCWSTR pszTemp;
UINT cbAlloc = sizeof(TCHAR); // for double NULL teriminaion of entire string
// compute length of buffer to aloc
for (pszTemp = pszDestSpecs; *pszTemp; pszTemp += lstrlenW(pszTemp) + 1)
{
// +1 for null teriminator
cbAlloc += cbDestSpec + lstrlenW(pszTemp) * sizeof(TCHAR) + sizeof(TCHAR);
}
LPTSTR pszRet = (LPTSTR)LocalAlloc(LPTR, cbAlloc);
if (pszRet)
{
LPTSTR pszDest = pszRet;
for (pszTemp = pszDestSpecs; *pszTemp; pszTemp += lstrlenW(pszTemp) + 1)
{
// PathCombine requires dest buffer of MAX_PATH size or it'll rip in call
// to PathCanonicalize (IsBadWritePtr)
TCHAR szTempDest[MAX_PATH];
PathCombine(szTempDest, pszDestDir, pszTemp);
lstrcpy(pszDest, szTempDest);
pszDest += lstrlen(pszDest) + 1;
ASSERT((UINT)((BYTE *)pszDest - (BYTE *)pszRet) < cbAlloc);
ASSERT(*pszDest == 0); // zero init alloc
}
ASSERT((LPTSTR)((BYTE *)pszRet + cbAlloc - sizeof(TCHAR)) >= pszDest);
ASSERT(*pszDest == 0); // zero init alloc
}
return pszRet;
}
LPTSTR RemapDestNamesA(LPCTSTR pszDestDir, LPCSTR pszDestSpecs)
{
UINT cbDestSpec = lstrlen(pszDestDir) * sizeof(TCHAR) + sizeof(TCHAR);
LPCSTR pszTemp;
LPTSTR pszRet;
UINT cbAlloc = sizeof(TCHAR); // for double NULL teriminaion of entire string
// compute length of buffer to aloc
for (pszTemp = pszDestSpecs; *pszTemp; pszTemp += lstrlenA(pszTemp) + 1)
{
// +1 for null teriminator
cbAlloc += cbDestSpec + lstrlenA(pszTemp) * sizeof(TCHAR) + sizeof(TCHAR);
}
pszRet = (LPTSTR)LocalAlloc(LPTR, cbAlloc);
if (pszRet)
{
LPTSTR pszDest = pszRet;
for (pszTemp = pszDestSpecs; *pszTemp; pszTemp += lstrlenA(pszTemp) + 1)
{
// PathCombine requires dest buffer of MAX_PATH size or it'll rip in call
// to PathCanonicalize (IsBadWritePtr)
TCHAR szTempDest[MAX_PATH];
WCHAR wszTemp[MAX_PATH];
SHAnsiToUnicode(pszTemp, wszTemp, ARRAYSIZE(wszTemp));
PathCombine(szTempDest, pszDestDir, wszTemp);
lstrcpy(pszDest, szTempDest);
pszDest += lstrlen(pszDest) + 1;
ASSERT((UINT)((BYTE *)pszDest - (BYTE *)pszRet) < cbAlloc);
ASSERT(*pszDest == 0); // zero init alloc
}
ASSERT((LPTSTR)((BYTE *)pszRet + cbAlloc - sizeof(TCHAR)) >= pszDest);
ASSERT(*pszDest == 0); // zero init alloc
}
return pszRet;
}
LPTSTR _GetDestNames(IDataObject *pdtobj, LPCTSTR pszPath)
{
LPTSTR pszDestNames = NULL;
STGMEDIUM medium;
FORMATETC fmte = {g_cfFileNameMapW, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
if (S_OK == pdtobj->GetData(&fmte, &medium))
{
pszDestNames = RemapDestNamesW(pszPath, (LPWSTR)GlobalLock(medium.hGlobal));
ReleaseStgMediumHGLOBAL(medium.hGlobal, &medium);
}
else
{
fmte.cfFormat = g_cfFileNameMapA;
if (S_OK == pdtobj->GetData(&fmte, &medium))
{
pszDestNames = RemapDestNamesA(pszPath, (LPSTR)GlobalLock(medium.hGlobal));
ReleaseStgMediumHGLOBAL(medium.hGlobal, &medium);
}
}
return pszDestNames;
}
BOOL _IsInSameFolder(LPCITEMIDLIST pidlFolder, IDataObject *pdtobj)
{
BOOL bRet = FALSE;
STGMEDIUM medium = {0};
LPIDA pida = DataObj_GetHIDA(pdtobj, &medium);
if (pida)
{
for (UINT i = 0; i < pida->cidl; i++)
{
LPITEMIDLIST pidl = IDA_FullIDList(pida, i);
if (pidl)
{
// if we're doing keyboard cut/copy/paste
// to and from the same directories
// This is needed for common desktop support - BobDay/EricFlo
if (AliasILIsParent(pidlFolder, pidl))
{
bRet = TRUE;
}
ILFree(pidl);
}
}
HIDA_ReleaseStgMedium(pida, &medium);
}
return bRet;
}
LPCTSTR _RootSpecialCase(LPCTSTR pszFiles, LPTSTR pszSrc, LPTSTR pszDest)
{
if ((1 == CountFiles(pszFiles)) &&
PathIsRoot(pszFiles))
{
SHFILEINFO sfi;
// NOTE: don't use SHGFI_USEFILEATTRIBUTES because the simple IDList
// support for \\server\share produces the wrong name
if (SHGetFileInfo(pszFiles, 0, &sfi, sizeof(sfi), SHGFI_DISPLAYNAME))
{
if (!(PCS_FATAL & PathCleanupSpec(pszDest, sfi.szDisplayName)))
{
PathAppend(pszDest, sfi.szDisplayName); // sub dir name based on source root path
PathCombine(pszSrc, pszFiles, TEXT("*.*")); // all files on source
pszFiles = pszSrc;
}
}
}
return pszFiles;
}
void CFSDropTarget::_MoveCopy(IDataObject *pdtobj, IFolderView* pfv, HDROP hDrop)
{
#ifdef DEBUG
if (_hwnd == NULL)
{
TraceMsg(TF_GENERAL, "_MoveCopy() without an hwnd which will prevent displaying insert disk UI");
}
#endif // DEBUG
DRAGINFO di = { sizeof(di) };
if (DragQueryInfo(hDrop, &di))
{
TCHAR szDest[MAX_PATH] = {0}; // zero init for dbl null termination
_GetPath(szDest);
switch (_idCmd)
{
case DDIDM_MOVE:
if (_fSameHwnd)
{
_MoveSelectIcons(pdtobj, pfv, NULL, NULL, TRUE, hDrop);
break;
}
// fall through...
case DDIDM_COPY:
{
TCHAR szAltSource[MAX_PATH] = {0}; // zero init for dbl null termination
LPCTSTR pszSource = _RootSpecialCase(di.lpFileList, szAltSource, szDest);
SHFILEOPSTRUCT fo =
{
_hwnd,
(DDIDM_COPY == _idCmd) ? FO_COPY : FO_MOVE,
pszSource,
szDest,
FOF_WANTMAPPINGHANDLE | FOF_ALLOWUNDO | FOF_NOCONFIRMMKDIR
};
if (fo.wFunc == FO_MOVE && IsFolderSecurityModeOn())
{
fo.fFlags |= FOF_NOCOPYSECURITYATTRIBS;
}
// if they are in the same hwnd or to and from
// the same directory, turn on the automatic rename on collision flag
if (_fSameHwnd ||
((DDIDM_COPY == _idCmd) && _IsInSameFolder(_GetIDList(), pdtobj)))
{
// do rename on collision for copy;
fo.fFlags |= FOF_RENAMEONCOLLISION;
}
// see if there is a rename mapping from recycle bin (or someone else)
LPTSTR pszDestNames = _GetDestNames(pdtobj, szDest);
if (pszDestNames)
{
fo.pTo = pszDestNames;
fo.fFlags |= FOF_MULTIDESTFILES;
fo.fFlags &= ~FOF_ALLOWUNDO; // HACK, this came from the recycle bin, don't allow undo
}
{
static UINT s_cfFileOpFlags = 0;
if (0 == s_cfFileOpFlags)
s_cfFileOpFlags = RegisterClipboardFormat(TEXT("FileOpFlags"));
fo.fFlags = (FILEOP_FLAGS)DataObj_GetDWORD(pdtobj, s_cfFileOpFlags, fo.fFlags);
}
// Check if there were any errors
if (SHFileOperation(&fo) == 0 && !fo.fAnyOperationsAborted)
{
if (_fBkDropTarget)
ShellFolderView_SetRedraw(_hwnd, 0);
SHChangeNotifyHandleEvents(); // force update now
if (_fBkDropTarget)
{
_MoveSelectIcons(pdtobj, pfv, fo.hNameMappings, pszDestNames, _fDragDrop, hDrop);
ShellFolderView_SetRedraw(_hwnd, TRUE);
}
}
if (fo.hNameMappings)
SHFreeNameMappings(fo.hNameMappings);
if (pszDestNames)
{
LocalFree((HLOCAL)pszDestNames);
// HACK, this usually comes from the bitbucket
// but in our shell, we don't handle the moves from the source
if (DDIDM_MOVE == _idCmd)
BBCheckRestoredFiles(pszSource);
}
}
break;
}
SHFree(di.lpFileList);
}
}
const UINT c_rgFolderShortcutTargets[] = {
CSIDL_STARTMENU,
CSIDL_COMMON_STARTMENU,
CSIDL_PROGRAMS,
CSIDL_COMMON_PROGRAMS,
CSIDL_NETHOOD,
};
BOOL _ShouldCreateFolderShortcut(LPCTSTR pszFolder)
{
return PathIsEqualOrSubFolderOf(pszFolder, c_rgFolderShortcutTargets, ARRAYSIZE(c_rgFolderShortcutTargets));
}
void CFSDropTarget::_DoDrop(IDataObject *pdtobj, IFolderView* pfv)
{
HRESULT hr = E_FAIL;
// Sleep(10 * 1000); // to debug async case
TCHAR szPath[MAX_PATH];
_GetPath(szPath);
SHCreateDirectory(NULL, szPath); // if this fails we catch it later
switch (_idCmd)
{
case DDIDM_SYNCCOPY:
case DDIDM_SYNCCOPYTYPE:
if (_IsBriefcaseTarget())
{
IBriefcaseStg *pbrfstg;
if (SUCCEEDED(CreateBrfStgFromPath(szPath, _hwnd, &pbrfstg)))
{
hr = pbrfstg->AddObject(pdtobj, NULL,
(DDIDM_SYNCCOPYTYPE == _idCmd) ? AOF_FILTERPROMPT : AOF_DEFAULT,
_hwnd);
pbrfstg->Release();
}
}
else
{
// Perform a sneakernet addition to the briefcase
STGMEDIUM medium;
LPIDA pida = DataObj_GetHIDA(pdtobj, &medium);
if (pida)
{
// Is there a briefcase root in this pdtobj?
IBriefcaseStg *pbrfstg;
if (SUCCEEDED(CreateBrfStgFromIDList(IDA_GetIDListPtr(pida, (UINT)-1), _hwnd, &pbrfstg)))
{
hr = pbrfstg->AddObject(pdtobj, szPath,
(DDIDM_SYNCCOPYTYPE == _idCmd) ? AOF_FILTERPROMPT : AOF_DEFAULT,
_hwnd);
pbrfstg->Release();
}
HIDA_ReleaseStgMedium(pida, &medium);
}
}
break;
case DDIDM_COPY:
case DDIDM_MOVE:
{
STGMEDIUM medium;
FORMATETC fmte = {CF_HDROP, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
hr = pdtobj->GetData(&fmte, &medium);
if (SUCCEEDED(hr))
{
_MoveCopy(pdtobj, pfv, (HDROP)medium.hGlobal);
ReleaseStgMedium(&medium);
}
}
break;
case DDIDM_LINK:
{
int i = 0;
LPITEMIDLIST *ppidl = NULL;
if (_fBkDropTarget)
{
i = DataObj_GetHIDACount(pdtobj);
ppidl = (LPITEMIDLIST *)LocalAlloc(LPTR, sizeof(*ppidl) * i);
}
// _grfKeyStateLast of 0 means this was a simulated drop
UINT uCreateFlags = _grfKeyStateLast && !(_dwEffectFolder & DROPEFFECT_LINK) ? SHCL_USETEMPLATE : 0;
if (_ShouldCreateFolderShortcut(szPath))
uCreateFlags |= SHCL_MAKEFOLDERSHORTCUT;
ShellFolderView_SetRedraw(_hwnd, FALSE);
// passing ppidl == NULL is correct in failure case
hr = SHCreateLinks(_hwnd, szPath, pdtobj, uCreateFlags, ppidl);
if (ppidl)
{
if (pfv)
PositionItems(pfv, (LPCITEMIDLIST*)ppidl, i, pdtobj, &_ptDrop);
FreeIDListArray(ppidl, i);
}
ShellFolderView_SetRedraw(_hwnd, TRUE);
}
break;
}
if (SUCCEEDED(hr) && _dwEffect)
{
DataObj_SetDWORD(pdtobj, g_cfLogicalPerformedDropEffect, _dwEffect);
DataObj_SetDWORD(pdtobj, g_cfPerformedDropEffect, _dwEffect);
}
SHChangeNotifyHandleEvents(); // force update now
}
DWORD CALLBACK CFSDropTarget::_DoDropThreadProc(void *pv)
{
DROPTHREADPARAMS *pdtp = (DROPTHREADPARAMS *)pv;
IDataObject *pdtobj;
if (SUCCEEDED(CoGetInterfaceAndReleaseStream(pdtp->pstmDataObj, IID_PPV_ARG(IDataObject, &pdtobj))))
{
IFolderView* pfv;
if (FAILED(CoGetInterfaceAndReleaseStream(pdtp->pstmFolderView, IID_PPV_ARG(IFolderView, &pfv))))
pfv = NULL;
pdtp->pThis->_DoDrop(pdtobj, pfv);
if (pfv)
pfv->Release();
pdtp->pstmFolderView = NULL; // stream now invalid; CoGetInterfaceAndReleaseStream already released it
pdtobj->Release();
}
pdtp->pstmDataObj = NULL; // stream now invalid; CoGetInterfaceAndReleaseStream already released it
_FreeThreadParams(pdtp);
CoFreeUnusedLibraries();
return 0;
}
// REARCHITECT: view and drop related helpers, these use the ugly old private defview messages
// we should replace the usage of this stuff with IShellFolderView programming
// create the pidl array that contains the destination file names. this is
// done by taking the source file names, and translating them through the
// name mapping returned by the copy engine.
//
//
// in:
// hDrop HDROP containing files recently moved/copied
// hNameMap used to translate names
//
// out:
// *pppidl id array of length return value
// # of items in pppida
//
// WARNING! You must use the provided HDROP. Do not attempt to ask the
// data object for a HDROP or HIDA or WS_FTP will break! They don't like
// it if you ask them for HDROP/HIDA, move the files to a new location
// (via the copy engine), and then ask them for HDROP/HIDA a second time.
// They notice that "Hey, those files I downloaded last time are gone!"
// and then get confused.
//
STDAPI_(int) CreateMoveCopyList(HDROP hDrop, void *hNameMap, LPITEMIDLIST **pppidl)
{
int nItems = 0;
if (hDrop)
{
nItems = DragQueryFile(hDrop, (UINT)-1, NULL, 0);
*pppidl = (LPITEMIDLIST *)LocalAlloc(LPTR, nItems * sizeof(*pppidl));
if (*pppidl)
{
for (int i = nItems - 1; i >= 0; i--)
{
TCHAR szPath[MAX_PATH];
DragQueryFile(hDrop, i, szPath, ARRAYSIZE(szPath));
_MapName(hNameMap, szPath);
(*pppidl)[i] = SHSimpleIDListFromPath(szPath);
}
}
}
return nItems;
}
// this is really not related to CFSFolder. it is generic over any view
// REARCHITECT: convert view hwnd programming to site pointer
STDAPI_(void) PositionFileFromDrop(HWND hwnd, LPCTSTR pszFile, DROPHISTORY *pdh)
{
LPITEMIDLIST pidl = SHSimpleIDListFromPath(pszFile);
if (pidl)
{
LPITEMIDLIST pidlNew = ILFindLastID(pidl);
HWND hwndView = ShellFolderViewWindow(hwnd);
SFM_SAP sap;
SHChangeNotifyHandleEvents();
// Fill in some easy SAP fields first.
sap.uSelectFlags = SVSI_SELECT;
sap.fMove = TRUE;
sap.pidl = pidlNew;
// Now compute the x,y coordinates.
// If we have a drop history, use it to determine the
// next point.
if (pdh)
{
// fill in the anchor point first...
if (!pdh->fInitialized)
{
ITEMSPACING is;
ShellFolderView_GetDropPoint(hwnd, &pdh->ptOrigin);
pdh->pt = pdh->ptOrigin; // Compute the first point.
// Compute the point deltas.
if (ShellFolderView_GetItemSpacing(hwnd, &is))
{
pdh->cxItem = is.cxSmall;
pdh->cyItem = is.cySmall;
pdh->xDiv = is.cxLarge;
pdh->yDiv = is.cyLarge;
pdh->xMul = is.cxSmall;
pdh->yMul = is.cySmall;
}
else
{
pdh->cxItem = g_cxIcon;
pdh->cyItem = g_cyIcon;
pdh->xDiv = pdh->yDiv = pdh->xMul = pdh->yMul = 1;
}
// First point gets special flags.
sap.uSelectFlags |= SVSI_ENSUREVISIBLE | SVSI_DESELECTOTHERS | SVSI_FOCUSED;
pdh->fInitialized = TRUE; // We be initialized.
}
// if we have no list of offsets, then just inc by icon size..
else if ( !pdh->pptOffset )
{
// Simple computation of the next point.
pdh->pt.x += pdh->cxItem;
pdh->pt.y += pdh->cyItem;
}
// do this after the above stuff so that we always get our position relative to the anchor
// point, if we use the anchor point as the first one things get screwy...
if (pdh->pptOffset)
{
// Transform the old offset to our coordinates.
pdh->pt.x = ((pdh->pptOffset[pdh->iItem].x * pdh->xMul) / pdh->xDiv) + pdh->ptOrigin.x;
pdh->pt.y = ((pdh->pptOffset[pdh->iItem].y * pdh->yMul) / pdh->yDiv) + pdh->ptOrigin.y;
}
sap.pt = pdh->pt; // Copy the next point from the drop history.
}
else
{
// Preinitialize this puppy in case the folder view doesn't
// know what the drop point is (e.g., if it didn't come from
// a drag/drop but rather from a paste or a ChangeNotify.)
sap.pt.x = 0x7FFFFFFF; // "don't know"
sap.pt.y = 0x7FFFFFFF;
// Get the drop point, conveniently already in
// defview's screen coordinates.
//
// pdv->bDropAnchor should be TRUE at this point,
// see DefView's GetDropPoint() for details.
ShellFolderView_GetDropPoint(hwnd, &sap.pt);
// Only point gets special flags.
sap.uSelectFlags |= SVSI_ENSUREVISIBLE | SVSI_DESELECTOTHERS | SVSI_FOCUSED;
}
SendMessage(hwndView, SVM_SELECTANDPOSITIONITEM, 1, (LPARAM)&sap);
ILFree(pidl);
}
}
//
// Class used to scale and position items for drag and drops. Handles
// scaling between different sized views.
//
//
// Bug 165413 (edwardp 8/16/00) Convert IShellFolderView usage in CItemPositioning to IFolderView
//
class CItemPositioning
{
// Methods
public:
CItemPositioning(IFolderView* pifv, LPCITEMIDLIST* apidl, UINT cidl, IDataObject* pdtobj, POINT* ppt);
void DragSetPoints(void);
void DropPositionItems(void);
private:
typedef enum
{
DPIWP_AUTOARRANGE,
DPIWP_DATAOBJ,
} DPIWP;
BOOL _DragShouldPositionItems(void);
BOOL _DragGetPoints(POINT* apts);
void _DragPositionPoints(POINT* apts);
void _DragScalePoints(POINT* apts);
POINT* _DropGetPoints(DPIWP dpiwp, STGMEDIUM* pMediam);
void _DropFreePoints(DPIWP dpiwp, POINT* apts, STGMEDIUM* pmedium);
void _DropPositionPoints(POINT* apts);
void _DropScalePoints(POINT* apts);
void _DropPositionItemsWithPoints(DPIWP dpiwp);
void _DropPositionItems(POINT* apts);
void _ScalePoints(POINT* apts, POINT ptFrom, POINT ptTo);
POINT* _SkipAnchorPoint(POINT* apts);
// Data
private:
IFolderView* _pfv;
LPCITEMIDLIST* _apidl;
UINT _cidl;
IDataObject* _pdtobj;
POINT* _ppt;
};
CItemPositioning::CItemPositioning(IFolderView* pifv, LPCITEMIDLIST* apidl, UINT cidl, IDataObject* pdtobj, POINT* ppt)
{
ASSERT(pifv);
ASSERT(apidl);
ASSERT(cidl);
ASSERT(pdtobj);
_pfv = pifv; // No need to addref as long as CPostionItems is only used locally.
_apidl = apidl;
_cidl = cidl;
_pdtobj = pdtobj; // No need to addref as long as CPostionItems is only used locally.
_ppt = ppt;
}
void CItemPositioning::DragSetPoints(void)
{
if (_DragShouldPositionItems())
{
POINT* apts = (POINT*) GlobalAlloc(GPTR, sizeof(POINT) * (_cidl + 1));
if (apts)
{
if (_DragGetPoints(apts))
{
_DragPositionPoints(_SkipAnchorPoint(apts));
_DragScalePoints(_SkipAnchorPoint(apts));
if (FAILED(DataObj_SetGlobal(_pdtobj, g_cfOFFSETS, apts)))
GlobalFree((HGLOBAL)apts);
}
else
{
GlobalFree((HGLOBAL)apts);
}
}
}
}
BOOL CItemPositioning::_DragShouldPositionItems()
{
// Don't position multiple items if they come from a view that doesn't allow
// positioning. The position information is not likely to be usefull in this
// case.
// Always position single items so they show up at the drop point.
// Don't bother with position data for 100 or more items.
return ((S_OK == _pfv->GetSpacing(NULL)) || 1 == _cidl) && _cidl < 100;
}
BOOL CItemPositioning::_DragGetPoints(POINT* apts)
{
BOOL fRet = TRUE;
// The first point is the anchor.
apts[0] = *_ppt;
for (UINT i = 0; i < _cidl; i++)
{
if (FAILED(_pfv->GetItemPosition(_apidl[i], &apts[i + 1])))
{
if (1 == _cidl)
{
apts[i + 1].x = _ppt->x;
apts[i + 1].y = _ppt->y;
}
else
{
fRet = FALSE;
}
}
}
return fRet;
}
void CItemPositioning::_DragPositionPoints(POINT* apts)
{
for (UINT i = 0; i < _cidl; i++)
{
apts[i].x -= _ppt->x;
apts[i].y -= _ppt->y;
}
}
void CItemPositioning::_DragScalePoints(POINT* apts)
{
POINT ptFrom;
POINT ptTo;
_pfv->GetSpacing(&ptFrom);
_pfv->GetDefaultSpacing(&ptTo);
if (ptFrom.x != ptTo.x || ptFrom.y != ptTo.y)
_ScalePoints(apts, ptFrom, ptTo);
}
void CItemPositioning::DropPositionItems(void)
{
if (S_OK == _pfv->GetAutoArrange())
{
_DropPositionItemsWithPoints(DPIWP_AUTOARRANGE);
}
else if (S_OK == _pfv->GetSpacing(NULL) && _ppt)
{
_DropPositionItemsWithPoints(DPIWP_DATAOBJ);
}
else
{
_DropPositionItems(NULL);
}
}
void CItemPositioning::_DropPositionItemsWithPoints(DPIWP dpiwp)
{
STGMEDIUM medium;
POINT* apts = _DropGetPoints(dpiwp, &medium);
if (apts)
{
if (DPIWP_DATAOBJ == dpiwp)
{
_DropScalePoints(_SkipAnchorPoint(apts));
_DropPositionPoints(_SkipAnchorPoint(apts));
}
_DropPositionItems(_SkipAnchorPoint(apts));
_DropFreePoints(dpiwp, apts, &medium);
}
else if (_ppt)
{
POINT *ppts;
ppts = (POINT *)LocalAlloc(LPTR, _cidl * sizeof(POINT));
if (ppts)
{
POINT pt;
_pfv->GetDefaultSpacing(&pt);
for (UINT i = 0; i < _cidl; i++)
{
ppts[i].x = (-g_cxIcon / 2) + (i * pt.x);
ppts[i].y = (-g_cyIcon / 2) + (i * pt.y);
}
_DropScalePoints(ppts);
_DropPositionPoints(ppts);
_DropPositionItems(ppts);
LocalFree(ppts);
}
else
{
_DropPositionItems(NULL);
}
}
else
{
_DropPositionItems(NULL);
}
}
void CItemPositioning::_DropPositionItems(POINT* apts)
{
// Drop the first item with special selection flags.
LPCITEMIDLIST pidl = ILFindLastID(_apidl[0]);
_pfv->SelectAndPositionItems(1, &pidl, apts, SVSI_SELECT | SVSI_ENSUREVISIBLE | SVSI_DESELECTOTHERS | SVSI_FOCUSED);
// Drop the rest of the items.
if (_cidl > 1)
{
LPCITEMIDLIST* apidl = (LPCITEMIDLIST*)LocalAlloc(GPTR, sizeof(LPCITEMIDLIST) * (_cidl - 1));
if (apidl)
{
for (UINT i = 1; i < _cidl; i++)
apidl[i - 1] = ILFindLastID(_apidl[i]);
_pfv->SelectAndPositionItems(_cidl - 1, apidl, (apts) ? &apts[1] : NULL, SVSI_SELECT);
LocalFree(apidl);
}
}
}
POINT* CItemPositioning::_DropGetPoints(DPIWP dpiwp, STGMEDIUM* pmedium)
{
POINT* pptRet = NULL;
if (DPIWP_DATAOBJ == dpiwp)
{
FORMATETC fmte = {g_cfOFFSETS, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
if (SUCCEEDED(_pdtobj->GetData(&fmte, pmedium)))
{
if (pmedium->hGlobal)
{
POINT *pptSrc;
pptSrc = (POINT *)GlobalLock(pmedium->hGlobal);
if (pptSrc)
{
pptRet = (POINT*)LocalAlloc(GPTR, (_cidl + 1) * sizeof(POINT));
if (pptRet)
{
for (UINT i = 0; i <= _cidl; i++)
{
pptRet[i] = pptSrc[i];
}
}
GlobalUnlock(pptSrc);
}
}
ReleaseStgMedium(pmedium);
}
}
else if (DPIWP_AUTOARRANGE == dpiwp)
{
if (_ppt)
{
pptRet = (POINT*)LocalAlloc(GPTR, (_cidl + 1) * sizeof(POINT));
if (pptRet)
{
// skip first point to simulate data object use of first point
for (UINT i = 1; i <= _cidl; i++)
{
pptRet[i] = *_ppt;
}
}
}
}
return pptRet;
}
void CItemPositioning::_DropFreePoints(DPIWP dpiwp, POINT* apts, STGMEDIUM* pmedium)
{
LocalFree(apts);
}
void CItemPositioning::_DropScalePoints(POINT* apts)
{
POINT ptFrom;
POINT ptTo;
_pfv->GetDefaultSpacing(&ptFrom);
_pfv->GetSpacing(&ptTo);
if (ptFrom.x != ptTo.x || ptFrom.y != ptTo.y)
_ScalePoints(apts, ptFrom, ptTo);
}
void CItemPositioning::_DropPositionPoints(POINT* apts)
{
for (UINT i = 0; i < _cidl; i++)
{
apts[i].x += _ppt->x;
apts[i].y += _ppt->y;
}
}
void CItemPositioning::_ScalePoints(POINT* apts, POINT ptFrom, POINT ptTo)
{
for (UINT i = 0; i < _cidl; i++)
{
apts[i].x = MulDiv(apts[i].x, ptTo.x, ptFrom.x);
apts[i].y = MulDiv(apts[i].y, ptTo.y, ptFrom.y);
}
}
POINT* CItemPositioning::_SkipAnchorPoint(POINT* apts)
{
return &apts[1];
}
STDAPI_(void) SetPositionItemsPoints(IFolderView* pifv, LPCITEMIDLIST* apidl, UINT cidl, IDataObject* pdtobj, POINT* ptDrag)
{
CItemPositioning cpi(pifv, apidl, cidl, pdtobj, ptDrag);
cpi.DragSetPoints();
}
STDAPI_(void) PositionItems(IFolderView* pifv, LPCITEMIDLIST* apidl, UINT cidl, IDataObject* pdtobj, POINT* ptDrop)
{
CItemPositioning cip(pifv, apidl, cidl, pdtobj, ptDrop);
cip.DropPositionItems();
}
//
// Don't use PositionItems_DontUse. Instead convert to PositionItems.
// PositionItems_DontUse will be removed.
//
// Bug#163533 (edwardp 8/15/00) Remove this code.
STDAPI_(void) PositionItems_DontUse(HWND hwndOwner, UINT cidl, const LPITEMIDLIST *ppidl, IDataObject *pdtobj, POINT *pptOrigin, BOOL fMove, BOOL fUseExactOrigin)
{
if (!ppidl || !IsWindow(hwndOwner))
return;
SFM_SAP *psap = (SFM_SAP *)GlobalAlloc(GPTR, sizeof(SFM_SAP) * cidl);
if (psap)
{
UINT i, cxItem, cyItem;
int xMul, yMul, xDiv, yDiv;
STGMEDIUM medium;
POINT *pptItems = NULL;
POINT pt;
ITEMSPACING is;
// select those objects;
// this had better not fail
HWND hwnd = ShellFolderViewWindow(hwndOwner);
if (fMove)
{
FORMATETC fmte = {g_cfOFFSETS, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
if (SUCCEEDED(pdtobj->GetData(&fmte, &medium)) &&
medium.hGlobal)
{
pptItems = (POINT *)GlobalLock(medium.hGlobal);
pptItems++; // The first point is the anchor
}
else
{
// By default, drop at (-g_cxIcon/2, -g_cyIcon/2), and increase
// x and y by icon dimension for each icon
pt.x = ((-3 * g_cxIcon) / 2) + pptOrigin->x;
pt.y = ((-3 * g_cyIcon) / 2) + pptOrigin->y;
medium.hGlobal = NULL;
}
if (ShellFolderView_GetItemSpacing(hwndOwner, &is))
{
xDiv = is.cxLarge;
yDiv = is.cyLarge;
xMul = is.cxSmall;
yMul = is.cySmall;
cxItem = is.cxSmall;
cyItem = is.cySmall;
}
else
{
xDiv = yDiv = xMul = yMul = 1;
cxItem = g_cxIcon;
cyItem = g_cyIcon;
}
}
for (i = 0; i < cidl; i++)
{
if (ppidl[i])
{
psap[i].pidl = ILFindLastID(ppidl[i]);
psap[i].fMove = fMove;
if (fMove)
{
if (fUseExactOrigin)
{
psap[i].pt = *pptOrigin;
}
else
{
if (pptItems)
{
psap[i].pt.x = ((pptItems[i].x * xMul) / xDiv) + pptOrigin->x;
psap[i].pt.y = ((pptItems[i].y * yMul) / yDiv) + pptOrigin->y;
}
else
{
pt.x += cxItem;
pt.y += cyItem;
psap[i].pt = pt;
}
}
}
// do regular selection from all of the rest of the items
psap[i].uSelectFlags = SVSI_SELECT;
}
}
// do this special one for the first only
psap[0].uSelectFlags = SVSI_SELECT | SVSI_ENSUREVISIBLE | SVSI_DESELECTOTHERS | SVSI_FOCUSED;
SendMessage(hwnd, SVM_SELECTANDPOSITIONITEM, cidl, (LPARAM)psap);
if (fMove && medium.hGlobal)
ReleaseStgMediumHGLOBAL(NULL, &medium);
GlobalFree(psap);
}
}
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