dlls/winex11.drv/xdnd.c

   1 /*
   2  * XDND handler code
   3  *
   4  * Copyright 2003 Ulrich Czekalla
   5  * Copyright 2007 Damjan Jovanovic
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #define COBJMACROS
  23 #define NONAMELESSUNION
  24
  25 #include "x11drv_dll.h"
  26 #include "shellapi.h"
  27 #include "shlobj.h"
  28
  29 #include "wine/debug.h"
  30 #include "wine/list.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(xdnd);
  33
  34 static struct format_entry *xdnd_formats, *xdnd_formats_end;
  35 static POINT XDNDxy = { 0, 0 };
  36 static IDataObject XDNDDataObject;
  37 static BOOL XDNDAccepted = FALSE;
  38 static DWORD XDNDDropEffect = DROPEFFECT_NONE;
  39 /* the last window the mouse was over */
  40 static HWND XDNDLastTargetWnd;
  41 /* might be an ancestor of XDNDLastTargetWnd */
  42 static HWND XDNDLastDropTargetWnd;
  43
  44 static BOOL X11DRV_XDND_HasHDROP(void);
  45 static HRESULT X11DRV_XDND_SendDropFiles(HWND hwnd);
  46 static void X11DRV_XDND_FreeDragDropOp(void);
  47
  48 static CRITICAL_SECTION xdnd_cs;
  49 static CRITICAL_SECTION_DEBUG critsect_debug =
  50 {
  51     0, 0, &xdnd_cs,
  52     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  53       0, 0, { (DWORD_PTR)(__FILE__ ": xdnd_cs") }
  54 };
  55 static CRITICAL_SECTION xdnd_cs = { &critsect_debug, -1, 0, 0, 0, 0 };
  56
  57
  58 static struct format_entry *next_format( struct format_entry *entry )
  59 {
  60     return (struct format_entry *)&entry->data[(entry->size + 7) & ~7];
  61 }
  62
  63
  64 /* Based on functions in dlls/ole32/ole2.c */
  65 static HANDLE get_droptarget_local_handle(HWND hwnd)
  66 {
  67     static const WCHAR prop_marshalleddroptarget[] =
  68         {'W','i','n','e','M','a','r','s','h','a','l','l','e','d','D','r','o','p','T','a','r','g','e','t',0};
  69     HANDLE handle;
  70     HANDLE local_handle = 0;
  71
  72     handle = GetPropW(hwnd, prop_marshalleddroptarget);
  73     if (handle)
  74     {
  75         DWORD pid;
  76         HANDLE process;
  77
  78         GetWindowThreadProcessId(hwnd, &pid);
  79         process = OpenProcess(PROCESS_DUP_HANDLE, FALSE, pid);
  80         if (process)
  81         {
  82             DuplicateHandle(process, handle, GetCurrentProcess(), &local_handle, 0, FALSE, DUPLICATE_SAME_ACCESS);
  83             CloseHandle(process);
  84         }
  85     }
  86     return local_handle;
  87 }
  88
  89 static HRESULT create_stream_from_map(HANDLE map, IStream **stream)
  90 {
  91     HRESULT hr = E_OUTOFMEMORY;
  92     HGLOBAL hmem;
  93     void *data;
  94     MEMORY_BASIC_INFORMATION info;
  95
  96     data = MapViewOfFile(map, FILE_MAP_READ, 0, 0, 0);
  97     if(!data) return hr;
  98
  99     VirtualQuery(data, &info, sizeof(info));
 100     TRACE("size %d\n", (int)info.RegionSize);
 101
 102     hmem = GlobalAlloc(GMEM_MOVEABLE, info.RegionSize);
 103     if(hmem)
 104     {
 105         memcpy(GlobalLock(hmem), data, info.RegionSize);
 106         GlobalUnlock(hmem);
 107         hr = CreateStreamOnHGlobal(hmem, TRUE, stream);
 108     }
 109     UnmapViewOfFile(data);
 110     return hr;
 111 }
 112
 113 static IDropTarget* get_droptarget_pointer(HWND hwnd)
 114 {
 115     IDropTarget *droptarget = NULL;
 116     HANDLE map;
 117     IStream *stream;
 118
 119     map = get_droptarget_local_handle(hwnd);
 120     if(!map) return NULL;
 121
 122     if(SUCCEEDED(create_stream_from_map(map, &stream)))
 123     {
 124         CoUnmarshalInterface(stream, &IID_IDropTarget, (void**)&droptarget);
 125         IStream_Release(stream);
 126     }
 127     CloseHandle(map);
 128     return droptarget;
 129 }
 130
 131
 132 /* Recursively searches for a window on given coordinates in a drag&drop specific manner.
 133  *
 134  * Don't use WindowFromPoint instead, because it omits the STATIC and transparent
 135  * windows, but they can be a valid drop targets if have WS_EX_ACCEPTFILES set.
 136  */
 137 static HWND window_from_point_dnd(HWND hwnd, POINT point)
 138 {
 139     HWND child;
 140     ScreenToClient(hwnd, &point);
 141     while ((child = ChildWindowFromPointEx(hwnd, point, CWP_SKIPDISABLED | CWP_SKIPINVISIBLE)) && child != hwnd)
 142     {
 143        MapWindowPoints(hwnd, child, &point, 1);
 144        hwnd = child;
 145     }
 146
 147     return hwnd;
 148 }
 149
 150 /* Returns the first window down the hierarchy that has WS_EX_ACCEPTFILES set or
 151  * returns NULL, if such window does not exists.
 152  */
 153 static HWND window_accepting_files(HWND hwnd)
 154 {
 155     while (hwnd && !(GetWindowLongW(hwnd, GWL_EXSTYLE) & WS_EX_ACCEPTFILES))
 156         /* MUST to be GetParent, not GetAncestor, because the owner window
 157          * (with WS_EX_ACCEPTFILES) of a window with WS_POPUP is a valid
 158          * drop target. GetParent works exactly this way!
 159          */
 160         hwnd = GetParent(hwnd);
 161     return hwnd;
 162 }
 163
 164 /**************************************************************************
 165  *           x11drv_dnd_position_event
 166  *
 167  * Handle an XdndPosition event.
 168  */
 169 NTSTATUS WINAPI x11drv_dnd_position_event( void *arg, ULONG size )
 170 {
 171     struct dnd_position_event_params *params = arg;
 172     int accept = 0; /* Assume we're not accepting */
 173     IDropTarget *dropTarget = NULL;
 174     DWORD effect = params->effect;
 175     POINTL pointl = { .x = params->point.x, .y = params->point.y };
 176     HWND targetWindow;
 177     HRESULT hr;
 178
 179     XDNDxy = params->point;
 180     targetWindow = window_from_point_dnd( UlongToHandle( params->hwnd ), XDNDxy );
 181
 182     if (!XDNDAccepted || XDNDLastTargetWnd != targetWindow)
 183     {
 184         /* Notify OLE of DragEnter. Result determines if we accept */
 185         HWND dropTargetWindow;
 186
 187         if (XDNDAccepted && XDNDLastDropTargetWnd)
 188         {
 189             dropTarget = get_droptarget_pointer(XDNDLastDropTargetWnd);
 190             if (dropTarget)
 191             {
 192                 hr = IDropTarget_DragLeave(dropTarget);
 193                 if (FAILED(hr))
 194                     WARN("IDropTarget_DragLeave failed, error 0x%08lx\n", hr);
 195                 IDropTarget_Release(dropTarget);
 196             }
 197         }
 198         dropTargetWindow = targetWindow;
 199         do
 200         {
 201             dropTarget = get_droptarget_pointer(dropTargetWindow);
 202         } while (dropTarget == NULL && (dropTargetWindow = GetParent(dropTargetWindow)) != NULL);
 203         XDNDLastTargetWnd = targetWindow;
 204         XDNDLastDropTargetWnd = dropTargetWindow;
 205         if (dropTarget)
 206         {
 207             DWORD effect_ignore = effect;
 208             hr = IDropTarget_DragEnter(dropTarget, &XDNDDataObject,
 209                                        MK_LBUTTON, pointl, &effect_ignore);
 210             if (hr == S_OK)
 211             {
 212                 XDNDAccepted = TRUE;
 213                 TRACE("the application accepted the drop (effect = %ld)\n", effect_ignore);
 214             }
 215             else
 216             {
 217                 XDNDAccepted = FALSE;
 218                 WARN("IDropTarget_DragEnter failed, error 0x%08lx\n", hr);
 219             }
 220             IDropTarget_Release(dropTarget);
 221         }
 222     }
 223     if (XDNDAccepted && XDNDLastTargetWnd == targetWindow)
 224     {
 225         /* If drag accepted notify OLE of DragOver */
 226         dropTarget = get_droptarget_pointer(XDNDLastDropTargetWnd);
 227         if (dropTarget)
 228         {
 229             hr = IDropTarget_DragOver(dropTarget, MK_LBUTTON, pointl, &effect);
 230             if (hr == S_OK)
 231                 XDNDDropEffect = effect;
 232             else
 233                 WARN("IDropTarget_DragOver failed, error 0x%08lx\n", hr);
 234             IDropTarget_Release(dropTarget);
 235         }
 236     }
 237
 238     if (XDNDAccepted)
 239         accept = 1;
 240     else
 241     {
 242         /* fallback search for window able to accept these files. */
 243
 244         if (window_accepting_files(targetWindow) && X11DRV_XDND_HasHDROP())
 245         {
 246             accept = 1;
 247             effect = DROPEFFECT_COPY;
 248         }
 249     }
 250
 251     return accept ? effect : 0;
 252 }
 253
 254 NTSTATUS x11drv_dnd_drop_event( UINT arg )
 255 {
 256     IDropTarget *dropTarget;
 257     DWORD effect = XDNDDropEffect;
 258     int accept = 0; /* Assume we're not accepting */
 259     BOOL drop_file = TRUE;
 260
 261     /* Notify OLE of Drop */
 262     if (XDNDAccepted)
 263     {
 264         dropTarget = get_droptarget_pointer(XDNDLastDropTargetWnd);
 265         if (dropTarget && effect!=DROPEFFECT_NONE)
 266         {
 267             HRESULT hr;
 268             POINTL pointl;
 269
 270             pointl.x = XDNDxy.x;
 271             pointl.y = XDNDxy.y;
 272             hr = IDropTarget_Drop(dropTarget, &XDNDDataObject, MK_LBUTTON,
 273                                   pointl, &effect);
 274             if (hr == S_OK)
 275             {
 276                 if (effect != DROPEFFECT_NONE)
 277                 {
 278                     TRACE("drop succeeded\n");
 279                     accept = 1;
 280                     drop_file = FALSE;
 281                 }
 282                 else
 283                     TRACE("the application refused the drop\n");
 284             }
 285             else if (FAILED(hr))
 286                 WARN("drop failed, error 0x%08lx\n", hr);
 287             else
 288             {
 289                 WARN("drop returned 0x%08lx\n", hr);
 290                 drop_file = FALSE;
 291             }
 292             IDropTarget_Release(dropTarget);
 293         }
 294         else if (dropTarget)
 295         {
 296             HRESULT hr = IDropTarget_DragLeave(dropTarget);
 297             if (FAILED(hr))
 298                 WARN("IDropTarget_DragLeave failed, error 0x%08lx\n", hr);
 299             IDropTarget_Release(dropTarget);
 300         }
 301     }
 302
 303     if (drop_file)
 304     {
 305         /* Only send WM_DROPFILES if Drop didn't succeed or DROPEFFECT_NONE was set.
 306          * Doing both causes winamp to duplicate the dropped files (#29081) */
 307
 308         HWND hwnd_drop = window_accepting_files(window_from_point_dnd( UlongToHandle(arg), XDNDxy ));
 309
 310         if (hwnd_drop && X11DRV_XDND_HasHDROP())
 311         {
 312             HRESULT hr = X11DRV_XDND_SendDropFiles(hwnd_drop);
 313             if (SUCCEEDED(hr))
 314             {
 315                 accept = 1;
 316                 effect = DROPEFFECT_COPY;
 317             }
 318         }
 319     }
 320
 321     TRACE("effectRequested(0x%lx) accept(%d) performed(0x%lx) at x(%ld),y(%ld)\n",
 322           XDNDDropEffect, accept, effect, XDNDxy.x, XDNDxy.y);
 323
 324     return accept ? effect : 0;
 325 }
 326
 327 /**************************************************************************
 328  *           x11drv_dnd_leave_event
 329  *
 330  * Handle an XdndLeave event.
 331  */
 332 NTSTATUS x11drv_dnd_leave_event( UINT arg )
 333 {
 334     IDropTarget *dropTarget;
 335
 336     TRACE("DND Operation canceled\n");
 337
 338     /* Notify OLE of DragLeave */
 339     if (XDNDAccepted)
 340     {
 341         dropTarget = get_droptarget_pointer(XDNDLastDropTargetWnd);
 342         if (dropTarget)
 343         {
 344             HRESULT hr = IDropTarget_DragLeave(dropTarget);
 345             if (FAILED(hr))
 346                 WARN("IDropTarget_DragLeave failed, error 0x%08lx\n", hr);
 347             IDropTarget_Release(dropTarget);
 348         }
 349     }
 350
 351     X11DRV_XDND_FreeDragDropOp();
 352     return 0;
 353 }
 354
 355
 356 /**************************************************************************
 357  *           x11drv_dnd_enter_event
 358  */
 359 NTSTATUS WINAPI x11drv_dnd_enter_event( void *params, ULONG size )
 360 {
 361     struct format_entry *formats = params;
 362     XDNDAccepted = FALSE;
 363     X11DRV_XDND_FreeDragDropOp(); /* Clear previously cached data */
 364
 365     if ((xdnd_formats = HeapAlloc( GetProcessHeap(), 0, size )))
 366     {
 367         memcpy( xdnd_formats, formats, size );
 368         xdnd_formats_end = (struct format_entry *)((char *)xdnd_formats + size);
 369     }
 370     return 0;
 371 }
 372
 373
 374 /**************************************************************************
 375  * X11DRV_XDND_HasHDROP
 376  */
 377 static BOOL X11DRV_XDND_HasHDROP(void)
 378 {
 379     struct format_entry *iter;
 380     BOOL found = FALSE;
 381
 382     EnterCriticalSection(&xdnd_cs);
 383
 384     /* Find CF_HDROP type if any */
 385     for (iter = xdnd_formats; iter < xdnd_formats_end; iter = next_format( iter ))
 386     {
 387         if (iter->format == CF_HDROP)
 388         {
 389             found = TRUE;
 390             break;
 391         }
 392     }
 393
 394     LeaveCriticalSection(&xdnd_cs);
 395
 396     return found;
 397 }
 398
 399 /**************************************************************************
 400  * X11DRV_XDND_SendDropFiles
 401  */
 402 static HRESULT X11DRV_XDND_SendDropFiles(HWND hwnd)
 403 {
 404     struct format_entry *iter;
 405     HRESULT hr;
 406     BOOL found = FALSE;
 407
 408     EnterCriticalSection(&xdnd_cs);
 409
 410     for (iter = xdnd_formats; iter < xdnd_formats_end; iter = next_format( iter ))
 411     {
 412          if (iter->format == CF_HDROP)
 413          {
 414              found = TRUE;
 415              break;
 416          }
 417     }
 418     if (found)
 419     {
 420         HGLOBAL dropHandle = GlobalAlloc(GMEM_FIXED, iter->size);
 421         if (dropHandle)
 422         {
 423             RECT rect;
 424             DROPFILES *lpDrop = GlobalLock(dropHandle);
 425             memcpy(lpDrop, iter->data, iter->size);
 426             lpDrop->pt.x = XDNDxy.x;
 427             lpDrop->pt.y = XDNDxy.y;
 428             lpDrop->fNC  = !(ScreenToClient(hwnd, &lpDrop->pt) &&
 429                              GetClientRect(hwnd, &rect) &&
 430                              PtInRect(&rect, lpDrop->pt));
 431             TRACE("Sending WM_DROPFILES: hWnd=0x%p, fNC=%d, x=%ld, y=%ld, files=%p(%s)\n", hwnd,
 432                     lpDrop->fNC, lpDrop->pt.x, lpDrop->pt.y, ((char*)lpDrop) + lpDrop->pFiles,
 433                     debugstr_w((WCHAR*)(((char*)lpDrop) + lpDrop->pFiles)));
 434             GlobalUnlock(dropHandle);
 435             if (PostMessageW(hwnd, WM_DROPFILES, (WPARAM)dropHandle, 0))
 436                 hr = S_OK;
 437             else
 438             {
 439                 hr = HRESULT_FROM_WIN32(GetLastError());
 440                 GlobalFree(dropHandle);
 441             }
 442         }
 443         else
 444             hr = HRESULT_FROM_WIN32(GetLastError());
 445     }
 446     else
 447         hr = E_FAIL;
 448
 449     LeaveCriticalSection(&xdnd_cs);
 450
 451     return hr;
 452 }
 453
 454
 455 /**************************************************************************
 456  * X11DRV_XDND_FreeDragDropOp
 457  */
 458 static void X11DRV_XDND_FreeDragDropOp(void)
 459 {
 460     TRACE("\n");
 461
 462     EnterCriticalSection(&xdnd_cs);
 463
 464     HeapFree( GetProcessHeap(), 0, xdnd_formats );
 465     xdnd_formats = xdnd_formats_end = NULL;
 466
 467     XDNDxy.x = XDNDxy.y = 0;
 468     XDNDLastTargetWnd = NULL;
 469     XDNDLastDropTargetWnd = NULL;
 470     XDNDAccepted = FALSE;
 471
 472     LeaveCriticalSection(&xdnd_cs);
 473 }
 474
 475
 476 /**************************************************************************
 477  * X11DRV_XDND_DescribeClipboardFormat
 478  */
 479 static void X11DRV_XDND_DescribeClipboardFormat(int cfFormat, char *buffer, int size)
 480 {
 481 #define D(x) case x: lstrcpynA(buffer, #x, size); return;
 482     switch (cfFormat)
 483     {
 484         D(CF_TEXT)
 485         D(CF_BITMAP)
 486         D(CF_METAFILEPICT)
 487         D(CF_SYLK)
 488         D(CF_DIF)
 489         D(CF_TIFF)
 490         D(CF_OEMTEXT)
 491         D(CF_DIB)
 492         D(CF_PALETTE)
 493         D(CF_PENDATA)
 494         D(CF_RIFF)
 495         D(CF_WAVE)
 496         D(CF_UNICODETEXT)
 497         D(CF_ENHMETAFILE)
 498         D(CF_HDROP)
 499         D(CF_LOCALE)
 500         D(CF_DIBV5)
 501     }
 502 #undef D
 503
 504     if (CF_PRIVATEFIRST <= cfFormat && cfFormat <= CF_PRIVATELAST)
 505     {
 506         lstrcpynA(buffer, "some private object", size);
 507         return;
 508     }
 509     if (CF_GDIOBJFIRST <= cfFormat && cfFormat <= CF_GDIOBJLAST)
 510     {
 511         lstrcpynA(buffer, "some GDI object", size);
 512         return;
 513     }
 514
 515     GetClipboardFormatNameA(cfFormat, buffer, size);
 516 }
 517
 518
 519 /* The IDataObject singleton we feed to OLE follows */
 520
 521 static HRESULT WINAPI XDNDDATAOBJECT_QueryInterface(IDataObject *dataObject,
 522                                                     REFIID riid, void **ppvObject)
 523 {
 524     TRACE("(%p, %s, %p)\n", dataObject, debugstr_guid(riid), ppvObject);
 525     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IDataObject))
 526     {
 527         *ppvObject = dataObject;
 528         IDataObject_AddRef(dataObject);
 529         return S_OK;
 530     }
 531     *ppvObject = NULL;
 532     return E_NOINTERFACE;
 533 }
 534
 535 static ULONG WINAPI XDNDDATAOBJECT_AddRef(IDataObject *dataObject)
 536 {
 537     TRACE("(%p)\n", dataObject);
 538     return 2;
 539 }
 540
 541 static ULONG WINAPI XDNDDATAOBJECT_Release(IDataObject *dataObject)
 542 {
 543     TRACE("(%p)\n", dataObject);
 544     return 1;
 545 }
 546
 547 static HRESULT WINAPI XDNDDATAOBJECT_GetData(IDataObject *dataObject,
 548                                              FORMATETC *formatEtc,
 549                                              STGMEDIUM *pMedium)
 550 {
 551     HRESULT hr;
 552     char formatDesc[1024];
 553
 554     TRACE("(%p, %p, %p)\n", dataObject, formatEtc, pMedium);
 555     X11DRV_XDND_DescribeClipboardFormat(formatEtc->cfFormat,
 556         formatDesc, sizeof(formatDesc));
 557     TRACE("application is looking for %s\n", formatDesc);
 558
 559     hr = IDataObject_QueryGetData(dataObject, formatEtc);
 560     if (SUCCEEDED(hr))
 561     {
 562         struct format_entry *iter;
 563
 564         for (iter = xdnd_formats; iter < xdnd_formats_end; iter = next_format( iter ))
 565         {
 566             if (iter->format == formatEtc->cfFormat)
 567             {
 568                 pMedium->tymed = TYMED_HGLOBAL;
 569                 pMedium->u.hGlobal = GlobalAlloc(GMEM_FIXED | GMEM_ZEROINIT, iter->size);
 570                 if (pMedium->u.hGlobal == NULL)
 571                     return E_OUTOFMEMORY;
 572                 memcpy(GlobalLock(pMedium->u.hGlobal), iter->data, iter->size);
 573                 GlobalUnlock(pMedium->u.hGlobal);
 574                 pMedium->pUnkForRelease = 0;
 575                 return S_OK;
 576             }
 577         }
 578     }
 579     return hr;
 580 }
 581
 582 static HRESULT WINAPI XDNDDATAOBJECT_GetDataHere(IDataObject *dataObject,
 583                                                  FORMATETC *formatEtc,
 584                                                  STGMEDIUM *pMedium)
 585 {
 586     FIXME("(%p, %p, %p): stub\n", dataObject, formatEtc, pMedium);
 587     return DATA_E_FORMATETC;
 588 }
 589
 590 static HRESULT WINAPI XDNDDATAOBJECT_QueryGetData(IDataObject *dataObject,
 591                                                   FORMATETC *formatEtc)
 592 {
 593     struct format_entry *iter;
 594     char formatDesc[1024];
 595
 596     TRACE("(%p, %p={.tymed=0x%lx, .dwAspect=%ld, .cfFormat=%d}\n",
 597         dataObject, formatEtc, formatEtc->tymed, formatEtc->dwAspect, formatEtc->cfFormat);
 598     X11DRV_XDND_DescribeClipboardFormat(formatEtc->cfFormat, formatDesc, sizeof(formatDesc));
 599
 600     if (formatEtc->tymed && !(formatEtc->tymed & TYMED_HGLOBAL))
 601     {
 602         FIXME("only HGLOBAL medium types supported right now\n");
 603         return DV_E_TYMED;
 604     }
 605     /* Windows Explorer ignores .dwAspect and .lindex for CF_HDROP,
 606      * and we have no way to implement them on XDnD anyway, so ignore them too.
 607      */
 608
 609     for (iter = xdnd_formats; iter < xdnd_formats_end; iter = next_format( iter ))
 610     {
 611         if (iter->format == formatEtc->cfFormat)
 612         {
 613             TRACE("application found %s\n", formatDesc);
 614             return S_OK;
 615         }
 616     }
 617     TRACE("application didn't find %s\n", formatDesc);
 618     return DV_E_FORMATETC;
 619 }
 620
 621 static HRESULT WINAPI XDNDDATAOBJECT_GetCanonicalFormatEtc(IDataObject *dataObject,
 622                                                            FORMATETC *formatEtc,
 623                                                            FORMATETC *formatEtcOut)
 624 {
 625     FIXME("(%p, %p, %p): stub\n", dataObject, formatEtc, formatEtcOut);
 626     formatEtcOut->ptd = NULL;
 627     return E_NOTIMPL;
 628 }
 629
 630 static HRESULT WINAPI XDNDDATAOBJECT_SetData(IDataObject *dataObject,
 631                                              FORMATETC *formatEtc,
 632                                              STGMEDIUM *pMedium, BOOL fRelease)
 633 {
 634     FIXME("(%p, %p, %p, %s): stub\n", dataObject, formatEtc,
 635         pMedium, fRelease?"TRUE":"FALSE");
 636     return E_NOTIMPL;
 637 }
 638
 639 static HRESULT WINAPI XDNDDATAOBJECT_EnumFormatEtc(IDataObject *dataObject,
 640                                                    DWORD dwDirection,
 641                                                    IEnumFORMATETC **ppEnumFormatEtc)
 642 {
 643     struct format_entry *iter;
 644     DWORD count = 0;
 645     FORMATETC *formats;
 646
 647     TRACE("(%p, %lu, %p)\n", dataObject, dwDirection, ppEnumFormatEtc);
 648
 649     if (dwDirection != DATADIR_GET)
 650     {
 651         FIXME("only the get direction is implemented\n");
 652         return E_NOTIMPL;
 653     }
 654
 655     for (iter = xdnd_formats; iter < xdnd_formats_end; iter = next_format( iter )) count++;
 656
 657     formats = HeapAlloc(GetProcessHeap(), 0, count * sizeof(FORMATETC));
 658     if (formats)
 659     {
 660         DWORD i = 0;
 661         HRESULT hr;
 662         for (iter = xdnd_formats; iter < xdnd_formats_end; iter = next_format( iter ))
 663         {
 664             formats[i].cfFormat = iter->format;
 665             formats[i].ptd = NULL;
 666             formats[i].dwAspect = DVASPECT_CONTENT;
 667             formats[i].lindex = -1;
 668             formats[i].tymed = TYMED_HGLOBAL;
 669             i++;
 670         }
 671         hr = SHCreateStdEnumFmtEtc(count, formats, ppEnumFormatEtc);
 672         HeapFree(GetProcessHeap(), 0, formats);
 673         return hr;
 674     }
 675     else
 676         return E_OUTOFMEMORY;
 677 }
 678
 679 static HRESULT WINAPI XDNDDATAOBJECT_DAdvise(IDataObject *dataObject,
 680                                              FORMATETC *formatEtc, DWORD advf,
 681                                              IAdviseSink *adviseSink,
 682                                              DWORD *pdwConnection)
 683 {
 684     FIXME("(%p, %p, %lu, %p, %p): stub\n", dataObject, formatEtc, advf,
 685         adviseSink, pdwConnection);
 686     return OLE_E_ADVISENOTSUPPORTED;
 687 }
 688
 689 static HRESULT WINAPI XDNDDATAOBJECT_DUnadvise(IDataObject *dataObject,
 690                                                DWORD dwConnection)
 691 {
 692     FIXME("(%p, %lu): stub\n", dataObject, dwConnection);
 693     return OLE_E_ADVISENOTSUPPORTED;
 694 }
 695
 696 static HRESULT WINAPI XDNDDATAOBJECT_EnumDAdvise(IDataObject *dataObject,
 697                                                  IEnumSTATDATA **pEnumAdvise)
 698 {
 699     FIXME("(%p, %p): stub\n", dataObject, pEnumAdvise);
 700     return OLE_E_ADVISENOTSUPPORTED;
 701 }
 702
 703 static IDataObjectVtbl xdndDataObjectVtbl =
 704 {
 705     XDNDDATAOBJECT_QueryInterface,
 706     XDNDDATAOBJECT_AddRef,
 707     XDNDDATAOBJECT_Release,
 708     XDNDDATAOBJECT_GetData,
 709     XDNDDATAOBJECT_GetDataHere,
 710     XDNDDATAOBJECT_QueryGetData,
 711     XDNDDATAOBJECT_GetCanonicalFormatEtc,
 712     XDNDDATAOBJECT_SetData,
 713     XDNDDATAOBJECT_EnumFormatEtc,
 714     XDNDDATAOBJECT_DAdvise,
 715     XDNDDATAOBJECT_DUnadvise,
 716     XDNDDATAOBJECT_EnumDAdvise
 717 };
 718
 719 static IDataObject XDNDDataObject = { &xdndDataObjectVtbl };
 720
 721 NTSTATUS WINAPI x11drv_dnd_post_drop( void *data, ULONG size )
 722 {
 723     HDROP handle;
 724
 725     if ((handle = GlobalAlloc( GMEM_SHARE, size )))
 726     {
 727         DROPFILES *ptr = GlobalLock( handle );
 728         HWND hwnd;
 729         memcpy( ptr, data, size );
 730         hwnd = UlongToHandle( ptr->fWide );
 731         ptr->fWide = TRUE;
 732         GlobalUnlock( handle );
 733         PostMessageW( hwnd, WM_DROPFILES, (WPARAM)handle, 0 );
 734     }
 735
 736     return 0;
 737 }