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 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <string.h>
  26 #ifdef HAVE_UNISTD_H
  27 # include <unistd.h>
  28 #endif
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31
  32 #define NONAMELESSUNION
  33
  34 #include "windef.h"
  35 #include "winbase.h"
  36 #include "wingdi.h"
  37 #include "winuser.h"
  38
  39 #define COBJMACROS
  40 #include "x11drv.h"
  41 #include "shellapi.h"
  42 #include "shlobj.h"  /* DROPFILES */
  43 #include "oleidl.h"
  44 #include "objidl.h"
  45
  46 #include "wine/unicode.h"
  47 #include "wine/debug.h"
  48 #include "wine/list.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(xdnd);
  51
  52 /* Maximum wait time for selection notify */
  53 #define SELECTION_RETRIES 500  /* wait for .1 seconds */
  54 #define SELECTION_WAIT    1000 /* us */
  55
  56 typedef struct tagXDNDDATA
  57 {
  58     int cf_win;
  59     Atom cf_xdnd;
  60     HANDLE contents;
  61     struct list entry;
  62 } XDNDDATA, *LPXDNDDATA;
  63
  64 static struct list xdndData = LIST_INIT(xdndData);
  65 static POINT XDNDxy = { 0, 0 };
  66 static IDataObject XDNDDataObject;
  67 static BOOL XDNDAccepted = FALSE;
  68 static DWORD XDNDDropEffect = DROPEFFECT_NONE;
  69 /* the last window the mouse was over */
  70 static HWND XDNDLastTargetWnd;
  71 /* might be an ancestor of XDNDLastTargetWnd */
  72 static HWND XDNDLastDropTargetWnd;
  73
  74 static void X11DRV_XDND_InsertXDNDData(int property, int format, HANDLE contents);
  75 static void X11DRV_XDND_ResolveProperty(Display *display, Window xwin, Time tm,
  76     Atom *types, unsigned long count);
  77 static void X11DRV_XDND_SendDropFiles(HWND hwnd);
  78 static void X11DRV_XDND_FreeDragDropOp(void);
  79
  80 static CRITICAL_SECTION xdnd_cs;
  81 static CRITICAL_SECTION_DEBUG critsect_debug =
  82 {
  83     0, 0, &xdnd_cs,
  84     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  85       0, 0, { (DWORD_PTR)(__FILE__ ": xdnd_cs") }
  86 };
  87 static CRITICAL_SECTION xdnd_cs = { &critsect_debug, -1, 0, 0, 0, 0 };
  88
  89
  90 /* Based on functions in dlls/ole32/ole2.c */
  91 static HANDLE get_droptarget_local_handle(HWND hwnd)
  92 {
  93     static const WCHAR prop_marshalleddroptarget[] =
  94         {'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};
  95     HANDLE handle;
  96     HANDLE local_handle = 0;
  97
  98     handle = GetPropW(hwnd, prop_marshalleddroptarget);
  99     if (handle)
 100     {
 101         DWORD pid;
 102         HANDLE process;
 103
 104         GetWindowThreadProcessId(hwnd, &pid);
 105         process = OpenProcess(PROCESS_DUP_HANDLE, FALSE, pid);
 106         if (process)
 107         {
 108             DuplicateHandle(process, handle, GetCurrentProcess(), &local_handle, 0, FALSE, DUPLICATE_SAME_ACCESS);
 109             CloseHandle(process);
 110         }
 111     }
 112     return local_handle;
 113 }
 114
 115 static HRESULT create_stream_from_map(HANDLE map, IStream **stream)
 116 {
 117     HRESULT hr = E_OUTOFMEMORY;
 118     HGLOBAL hmem;
 119     void *data;
 120     MEMORY_BASIC_INFORMATION info;
 121
 122     data = MapViewOfFile(map, FILE_MAP_READ, 0, 0, 0);
 123     if(!data) return hr;
 124
 125     VirtualQuery(data, &info, sizeof(info));
 126     TRACE("size %d\n", (int)info.RegionSize);
 127
 128     hmem = GlobalAlloc(GMEM_MOVEABLE, info.RegionSize);
 129     if(hmem)
 130     {
 131         memcpy(GlobalLock(hmem), data, info.RegionSize);
 132         GlobalUnlock(hmem);
 133         hr = CreateStreamOnHGlobal(hmem, TRUE, stream);
 134     }
 135     UnmapViewOfFile(data);
 136     return hr;
 137 }
 138
 139 static IDropTarget* get_droptarget_pointer(HWND hwnd)
 140 {
 141     IDropTarget *droptarget = NULL;
 142     HANDLE map;
 143     IStream *stream;
 144
 145     map = get_droptarget_local_handle(hwnd);
 146     if(!map) return NULL;
 147
 148     if(SUCCEEDED(create_stream_from_map(map, &stream)))
 149     {
 150         CoUnmarshalInterface(stream, &IID_IDropTarget, (void**)&droptarget);
 151         IStream_Release(stream);
 152     }
 153     CloseHandle(map);
 154     return droptarget;
 155 }
 156
 157 /**************************************************************************
 158  * X11DRV_XDND_XdndActionToDROPEFFECT
 159  */
 160 static DWORD X11DRV_XDND_XdndActionToDROPEFFECT(long action)
 161 {
 162     /* In Windows, nothing but the given effects is allowed.
 163      * In X the given action is just a hint, and you can always
 164      * XdndActionCopy and XdndActionPrivate, so be more permissive. */
 165     if (action == x11drv_atom(XdndActionCopy))
 166         return DROPEFFECT_COPY;
 167     else if (action == x11drv_atom(XdndActionMove))
 168         return DROPEFFECT_MOVE | DROPEFFECT_COPY;
 169     else if (action == x11drv_atom(XdndActionLink))
 170         return DROPEFFECT_LINK | DROPEFFECT_COPY;
 171     else if (action == x11drv_atom(XdndActionAsk))
 172         /* FIXME: should we somehow ask the user what to do here? */
 173         return DROPEFFECT_COPY | DROPEFFECT_MOVE | DROPEFFECT_LINK;
 174     FIXME("unknown action %ld, assuming DROPEFFECT_COPY\n", action);
 175     return DROPEFFECT_COPY;
 176 }
 177
 178 /**************************************************************************
 179  * X11DRV_XDND_DROPEFFECTToXdndAction
 180  */
 181 static long X11DRV_XDND_DROPEFFECTToXdndAction(DWORD effect)
 182 {
 183     if (effect == DROPEFFECT_COPY)
 184         return x11drv_atom(XdndActionCopy);
 185     else if (effect == DROPEFFECT_MOVE)
 186         return x11drv_atom(XdndActionMove);
 187     else if (effect == DROPEFFECT_LINK)
 188         return x11drv_atom(XdndActionLink);
 189     FIXME("unknown drop effect %u, assuming XdndActionCopy\n", effect);
 190     return x11drv_atom(XdndActionCopy);
 191 }
 192
 193 /**************************************************************************
 194  * X11DRV_XDND_EnterEvent
 195  *
 196  * Handle an XdndEnter event.
 197  */
 198 void X11DRV_XDND_EnterEvent( HWND hWnd, XClientMessageEvent *event )
 199 {
 200     int version;
 201     Atom *xdndtypes;
 202     unsigned long count = 0;
 203
 204     version = (event->data.l[1] & 0xFF000000) >> 24;
 205     TRACE("ver(%d) check-XdndTypeList(%ld) data=%ld,%ld,%ld,%ld,%ld\n",
 206           version, (event->data.l[1] & 1),
 207           event->data.l[0], event->data.l[1], event->data.l[2],
 208           event->data.l[3], event->data.l[4]);
 209
 210     if (version > WINE_XDND_VERSION)
 211     {
 212         TRACE("Ignores unsupported version\n");
 213         return;
 214     }
 215
 216     XDNDAccepted = FALSE;
 217
 218     /* If the source supports more than 3 data types we retrieve
 219      * the entire list. */
 220     if (event->data.l[1] & 1)
 221     {
 222         Atom acttype;
 223         int actfmt;
 224         unsigned long bytesret;
 225
 226         /* Request supported formats from source window */
 227         XGetWindowProperty(event->display, event->data.l[0], x11drv_atom(XdndTypeList),
 228                            0, 65535, FALSE, AnyPropertyType, &acttype, &actfmt, &count,
 229                            &bytesret, (unsigned char**)&xdndtypes);
 230     }
 231     else
 232     {
 233         count = 3;
 234         xdndtypes = (Atom*) &event->data.l[2];
 235     }
 236
 237     if (TRACE_ON(xdnd))
 238     {
 239         unsigned int i;
 240
 241         for (i = 0; i < count; i++)
 242         {
 243             if (xdndtypes[i] != 0)
 244             {
 245                 char * pn = XGetAtomName(event->display, xdndtypes[i]);
 246                 TRACE("XDNDEnterAtom %ld: %s\n", xdndtypes[i], pn);
 247                 XFree(pn);
 248             }
 249         }
 250     }
 251
 252     /* Do a one-time data read and cache results */
 253     X11DRV_XDND_ResolveProperty(event->display, event->window,
 254                                 event->data.l[1], xdndtypes, count);
 255
 256     if (event->data.l[1] & 1)
 257         XFree(xdndtypes);
 258 }
 259
 260 /**************************************************************************
 261  * X11DRV_XDND_PositionEvent
 262  *
 263  * Handle an XdndPosition event.
 264  */
 265 void X11DRV_XDND_PositionEvent( HWND hWnd, XClientMessageEvent *event )
 266 {
 267     XClientMessageEvent e;
 268     int accept = 0; /* Assume we're not accepting */
 269     IDropTarget *dropTarget = NULL;
 270     DWORD effect;
 271     POINTL pointl;
 272     HWND targetWindow;
 273     HRESULT hr;
 274
 275     XDNDxy = root_to_virtual_screen( event->data.l[2] >> 16, event->data.l[2] & 0xFFFF );
 276     targetWindow = WindowFromPoint(XDNDxy);
 277
 278     pointl.x = XDNDxy.x;
 279     pointl.y = XDNDxy.y;
 280     effect = X11DRV_XDND_XdndActionToDROPEFFECT(event->data.l[4]);
 281
 282     if (!XDNDAccepted || XDNDLastTargetWnd != targetWindow)
 283     {
 284         /* Notify OLE of DragEnter. Result determines if we accept */
 285         HWND dropTargetWindow;
 286
 287         if (XDNDLastDropTargetWnd)
 288         {
 289             dropTarget = get_droptarget_pointer(XDNDLastDropTargetWnd);
 290             if (dropTarget)
 291             {
 292                 hr = IDropTarget_DragLeave(dropTarget);
 293                 if (FAILED(hr))
 294                     WARN("IDropTarget_DragLeave failed, error 0x%08X\n", hr);
 295                 IDropTarget_Release(dropTarget);
 296             }
 297         }
 298         dropTargetWindow = targetWindow;
 299         do
 300         {
 301             dropTarget = get_droptarget_pointer(dropTargetWindow);
 302         } while (dropTarget == NULL && (dropTargetWindow = GetParent(dropTargetWindow)) != NULL);
 303         XDNDLastTargetWnd = targetWindow;
 304         XDNDLastDropTargetWnd = dropTargetWindow;
 305         if (dropTarget)
 306         {
 307             hr = IDropTarget_DragEnter(dropTarget, &XDNDDataObject,
 308                                        MK_LBUTTON, pointl, &effect);
 309             if (SUCCEEDED(hr))
 310             {
 311                 if (effect != DROPEFFECT_NONE)
 312                 {
 313                     XDNDAccepted = TRUE;
 314                     TRACE("the application accepted the drop\n");
 315                 }
 316                 else
 317                     TRACE("the application refused the drop\n");
 318             }
 319             else
 320                 WARN("IDropTarget_DragEnter failed, error 0x%08X\n", hr);
 321             IDropTarget_Release(dropTarget);
 322         }
 323     }
 324     if (XDNDAccepted && XDNDLastTargetWnd == targetWindow)
 325     {
 326         /* If drag accepted notify OLE of DragOver */
 327         dropTarget = get_droptarget_pointer(XDNDLastDropTargetWnd);
 328         if (dropTarget)
 329         {
 330             hr = IDropTarget_DragOver(dropTarget, MK_LBUTTON, pointl, &effect);
 331             if (SUCCEEDED(hr))
 332                 XDNDDropEffect = effect;
 333             else
 334                 WARN("IDropTarget_DragOver failed, error 0x%08X\n", hr);
 335             IDropTarget_Release(dropTarget);
 336         }
 337     }
 338
 339     if (XDNDAccepted)
 340         accept = 1;
 341     if (GetWindowLongW( hWnd, GWL_EXSTYLE ) & WS_EX_ACCEPTFILES)
 342         accept = 1;
 343
 344     TRACE("action req: %ld accept(%d) at x(%d),y(%d)\n",
 345           event->data.l[4], accept, XDNDxy.x, XDNDxy.y);
 346
 347     /*
 348      * Let source know if we're accepting the drop by
 349      * sending a status message.
 350      */
 351     e.type = ClientMessage;
 352     e.display = event->display;
 353     e.window = event->data.l[0];
 354     e.message_type = x11drv_atom(XdndStatus);
 355     e.format = 32;
 356     e.data.l[0] = event->window;
 357     e.data.l[1] = accept;
 358     e.data.l[2] = 0; /* Empty Rect */
 359     e.data.l[3] = 0; /* Empty Rect */
 360     if (accept)
 361         e.data.l[4] = X11DRV_XDND_DROPEFFECTToXdndAction(effect);
 362     else
 363         e.data.l[4] = None;
 364     XSendEvent(event->display, event->data.l[0], False, NoEventMask, (XEvent*)&e);
 365 }
 366
 367 /**************************************************************************
 368  * X11DRV_XDND_DropEvent
 369  *
 370  * Handle an XdndDrop event.
 371  */
 372 void X11DRV_XDND_DropEvent( HWND hWnd, XClientMessageEvent *event )
 373 {
 374     XClientMessageEvent e;
 375     IDropTarget *dropTarget;
 376
 377     TRACE("\n");
 378
 379     /* If we have a HDROP type we send a WM_ACCEPTFILES.*/
 380     if (GetWindowLongW( hWnd, GWL_EXSTYLE ) & WS_EX_ACCEPTFILES)
 381         X11DRV_XDND_SendDropFiles( hWnd );
 382
 383     /* Notify OLE of Drop */
 384     dropTarget = get_droptarget_pointer(XDNDLastDropTargetWnd);
 385     if (dropTarget)
 386     {
 387         HRESULT hr;
 388         POINTL pointl;
 389         DWORD effect = XDNDDropEffect;
 390
 391         pointl.x = XDNDxy.x;
 392         pointl.y = XDNDxy.y;
 393         hr = IDropTarget_Drop(dropTarget, &XDNDDataObject, MK_LBUTTON,
 394                               pointl, &effect);
 395         if (SUCCEEDED(hr))
 396         {
 397             if (effect != DROPEFFECT_NONE)
 398                 TRACE("drop succeeded\n");
 399             else
 400                 TRACE("the application refused the drop\n");
 401         }
 402         else
 403             WARN("drop failed, error 0x%08X\n", hr);
 404         IDropTarget_Release(dropTarget);
 405     }
 406
 407     X11DRV_XDND_FreeDragDropOp();
 408
 409     /* Tell the target we are finished. */
 410     memset(&e, 0, sizeof(e));
 411     e.type = ClientMessage;
 412     e.display = event->display;
 413     e.window = event->data.l[0];
 414     e.message_type = x11drv_atom(XdndFinished);
 415     e.format = 32;
 416     e.data.l[0] = event->window;
 417     XSendEvent(event->display, event->data.l[0], False, NoEventMask, (XEvent*)&e);
 418 }
 419
 420 /**************************************************************************
 421  * X11DRV_XDND_LeaveEvent
 422  *
 423  * Handle an XdndLeave event.
 424  */
 425 void X11DRV_XDND_LeaveEvent( HWND hWnd, XClientMessageEvent *event )
 426 {
 427     IDropTarget *dropTarget;
 428
 429     TRACE("DND Operation canceled\n");
 430
 431     /* Notify OLE of DragLeave */
 432     dropTarget = get_droptarget_pointer(XDNDLastDropTargetWnd);
 433     if (dropTarget)
 434     {
 435         HRESULT hr = IDropTarget_DragLeave(dropTarget);
 436         if (FAILED(hr))
 437             WARN("IDropTarget_DragLeave failed, error 0x%08X\n", hr);
 438         IDropTarget_Release(dropTarget);
 439     }
 440
 441     X11DRV_XDND_FreeDragDropOp();
 442 }
 443
 444
 445 /**************************************************************************
 446  * X11DRV_XDND_ResolveProperty
 447  *
 448  * Resolve all MIME types to windows clipboard formats. All data is cached.
 449  */
 450 static void X11DRV_XDND_ResolveProperty(Display *display, Window xwin, Time tm,
 451                                         Atom *types, unsigned long count)
 452 {
 453     unsigned int i, j;
 454     BOOL res;
 455     XEvent xe;
 456     XDNDDATA *current, *next;
 457     BOOL haveHDROP = FALSE;
 458
 459     TRACE("count(%ld)\n", count);
 460
 461     X11DRV_XDND_FreeDragDropOp(); /* Clear previously cached data */
 462
 463     for (i = 0; i < count; i++)
 464     {
 465         HANDLE contents;
 466         UINT windowsFormat;
 467
 468         TRACE("requesting atom %ld from xwin %ld\n", types[i], xwin);
 469
 470         if (types[i] == 0)
 471             continue;
 472
 473         XConvertSelection(display, x11drv_atom(XdndSelection), types[i],
 474                           x11drv_atom(XdndTarget), xwin, /*tm*/CurrentTime);
 475
 476         /*
 477          * Wait for SelectionNotify
 478          */
 479         for (j = 0; j < SELECTION_RETRIES; j++)
 480         {
 481             res = XCheckTypedWindowEvent(display, xwin, SelectionNotify, &xe);
 482             if (res && xe.xselection.selection == x11drv_atom(XdndSelection)) break;
 483
 484             usleep(SELECTION_WAIT);
 485         }
 486
 487         if (xe.xselection.property == None)
 488             continue;
 489
 490         contents = X11DRV_CLIPBOARD_ImportSelection(display, types[i], xwin, x11drv_atom(XdndTarget), &windowsFormat);
 491         if (contents)
 492             X11DRV_XDND_InsertXDNDData(types[i], windowsFormat, contents);
 493     }
 494
 495     /* On Windows when there is a CF_HDROP, there are no other CF_ formats.
 496      * foobar2000 relies on this (spaces -> %20's without it).
 497      */
 498     LIST_FOR_EACH_ENTRY(current, &xdndData, XDNDDATA, entry)
 499     {
 500         if (current->cf_win == CF_HDROP)
 501         {
 502             haveHDROP = TRUE;
 503             break;
 504         }
 505     }
 506     if (haveHDROP)
 507     {
 508         LIST_FOR_EACH_ENTRY_SAFE(current, next, &xdndData, XDNDDATA, entry)
 509         {
 510             if (current->cf_win != CF_HDROP && current->cf_win < CF_MAX)
 511             {
 512                 list_remove(&current->entry);
 513                 GlobalFree(current->contents);
 514                 HeapFree(GetProcessHeap(), 0, current);
 515             }
 516         }
 517     }
 518 }
 519
 520
 521 /**************************************************************************
 522  * X11DRV_XDND_InsertXDNDData
 523  *
 524  * Cache available XDND property
 525  */
 526 static void X11DRV_XDND_InsertXDNDData(int property, int format, HANDLE contents)
 527 {
 528     LPXDNDDATA current = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(XDNDDATA));
 529
 530     if (current)
 531     {
 532         EnterCriticalSection(&xdnd_cs);
 533         current->cf_xdnd = property;
 534         current->cf_win = format;
 535         current->contents = contents;
 536         list_add_tail(&xdndData, &current->entry);
 537         LeaveCriticalSection(&xdnd_cs);
 538     }
 539 }
 540
 541
 542 /**************************************************************************
 543  * X11DRV_XDND_SendDropFiles
 544  */
 545 static void X11DRV_XDND_SendDropFiles(HWND hwnd)
 546 {
 547     LPXDNDDATA current = NULL;
 548     BOOL found = FALSE;
 549
 550     EnterCriticalSection(&xdnd_cs);
 551
 552     /* Find CF_HDROP type if any */
 553     LIST_FOR_EACH_ENTRY(current, &xdndData, XDNDDATA, entry)
 554     {
 555         if (current->cf_win == CF_HDROP)
 556         {
 557             found = TRUE;
 558             break;
 559         }
 560     }
 561
 562     if (found)
 563     {
 564         HGLOBAL dropHandle = GlobalAlloc(GMEM_FIXED, GlobalSize(current->contents));
 565
 566         if (dropHandle)
 567         {
 568             DROPFILES *lpDrop = GlobalLock(dropHandle);
 569             lpDrop->pt.x = XDNDxy.x;
 570             lpDrop->pt.y = XDNDxy.y;
 571             memcpy(lpDrop, GlobalLock(current->contents), GlobalSize(current->contents));
 572             TRACE("Sending WM_DROPFILES: hWnd(0x%p) %p(%s)\n", hwnd,
 573                 ((char*)lpDrop) + lpDrop->pFiles, debugstr_w((WCHAR*)(((char*)lpDrop) + lpDrop->pFiles)));
 574             GlobalUnlock(dropHandle);
 575
 576             if (!PostMessageW(hwnd, WM_DROPFILES, (WPARAM)dropHandle, 0))
 577                 GlobalFree(dropHandle);
 578         }
 579     }
 580
 581     LeaveCriticalSection(&xdnd_cs);
 582 }
 583
 584
 585 /**************************************************************************
 586  * X11DRV_XDND_FreeDragDropOp
 587  */
 588 static void X11DRV_XDND_FreeDragDropOp(void)
 589 {
 590     LPXDNDDATA next;
 591     LPXDNDDATA current;
 592
 593     TRACE("\n");
 594
 595     EnterCriticalSection(&xdnd_cs);
 596
 597     /** Free data cache */
 598     LIST_FOR_EACH_ENTRY_SAFE(current, next, &xdndData, XDNDDATA, entry)
 599     {
 600         list_remove(&current->entry);
 601         GlobalFree(current->contents);
 602         HeapFree(GetProcessHeap(), 0, current);
 603     }
 604
 605     XDNDxy.x = XDNDxy.y = 0;
 606     XDNDLastTargetWnd = NULL;
 607     XDNDLastDropTargetWnd = NULL;
 608     XDNDAccepted = FALSE;
 609
 610     LeaveCriticalSection(&xdnd_cs);
 611 }
 612
 613
 614 /**************************************************************************
 615  * X11DRV_XDND_DescribeClipboardFormat
 616  */
 617 static void X11DRV_XDND_DescribeClipboardFormat(int cfFormat, char *buffer, int size)
 618 {
 619 #define D(x) case x: lstrcpynA(buffer, #x, size); return;
 620     switch (cfFormat)
 621     {
 622         D(CF_TEXT)
 623         D(CF_BITMAP)
 624         D(CF_METAFILEPICT)
 625         D(CF_SYLK)
 626         D(CF_DIF)
 627         D(CF_TIFF)
 628         D(CF_OEMTEXT)
 629         D(CF_DIB)
 630         D(CF_PALETTE)
 631         D(CF_PENDATA)
 632         D(CF_RIFF)
 633         D(CF_WAVE)
 634         D(CF_UNICODETEXT)
 635         D(CF_ENHMETAFILE)
 636         D(CF_HDROP)
 637         D(CF_LOCALE)
 638         D(CF_DIBV5)
 639     }
 640 #undef D
 641
 642     if (CF_PRIVATEFIRST <= cfFormat && cfFormat <= CF_PRIVATELAST)
 643     {
 644         lstrcpynA(buffer, "some private object", size);
 645         return;
 646     }
 647     if (CF_GDIOBJFIRST <= cfFormat && cfFormat <= CF_GDIOBJLAST)
 648     {
 649         lstrcpynA(buffer, "some GDI object", size);
 650         return;
 651     }
 652
 653     GetClipboardFormatNameA(cfFormat, buffer, size);
 654 }
 655
 656
 657 /* The IDataObject singleton we feed to OLE follows */
 658
 659 static HRESULT WINAPI XDNDDATAOBJECT_QueryInterface(IDataObject *dataObject,
 660                                                     REFIID riid, void **ppvObject)
 661 {
 662     TRACE("(%p, %s, %p)\n", dataObject, debugstr_guid(riid), ppvObject);
 663     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IDataObject))
 664     {
 665         *ppvObject = dataObject;
 666         IDataObject_AddRef(dataObject);
 667         return S_OK;
 668     }
 669     *ppvObject = NULL;
 670     return E_NOINTERFACE;
 671 }
 672
 673 static ULONG WINAPI XDNDDATAOBJECT_AddRef(IDataObject *dataObject)
 674 {
 675     TRACE("(%p)\n", dataObject);
 676     return 2;
 677 }
 678
 679 static ULONG WINAPI XDNDDATAOBJECT_Release(IDataObject *dataObject)
 680 {
 681     TRACE("(%p)\n", dataObject);
 682     return 1;
 683 }
 684
 685 static HRESULT WINAPI XDNDDATAOBJECT_GetData(IDataObject *dataObject,
 686                                              FORMATETC *formatEtc,
 687                                              STGMEDIUM *pMedium)
 688 {
 689     HRESULT hr;
 690     char formatDesc[1024];
 691
 692     TRACE("(%p, %p, %p)\n", dataObject, formatEtc, pMedium);
 693     X11DRV_XDND_DescribeClipboardFormat(formatEtc->cfFormat,
 694         formatDesc, sizeof(formatDesc));
 695     TRACE("application is looking for %s\n", formatDesc);
 696
 697     hr = IDataObject_QueryGetData(dataObject, formatEtc);
 698     if (SUCCEEDED(hr))
 699     {
 700         XDNDDATA *current;
 701         LIST_FOR_EACH_ENTRY(current, &xdndData, XDNDDATA, entry)
 702         {
 703             if (current->cf_win == formatEtc->cfFormat)
 704             {
 705                 pMedium->tymed = TYMED_HGLOBAL;
 706                 pMedium->u.hGlobal = GlobalAlloc(GMEM_FIXED | GMEM_ZEROINIT, GlobalSize(current->contents));
 707                 if (pMedium->u.hGlobal == NULL)
 708                     return E_OUTOFMEMORY;
 709                 memcpy(GlobalLock(pMedium->u.hGlobal), GlobalLock(current->contents), GlobalSize(current->contents));
 710                 GlobalUnlock(pMedium->u.hGlobal);
 711                 GlobalUnlock(current->contents);
 712                 pMedium->pUnkForRelease = 0;
 713                 return S_OK;
 714             }
 715         }
 716     }
 717     return hr;
 718 }
 719
 720 static HRESULT WINAPI XDNDDATAOBJECT_GetDataHere(IDataObject *dataObject,
 721                                                  FORMATETC *formatEtc,
 722                                                  STGMEDIUM *pMedium)
 723 {
 724     FIXME("(%p, %p, %p): stub\n", dataObject, formatEtc, pMedium);
 725     return DATA_E_FORMATETC;
 726 }
 727
 728 static HRESULT WINAPI XDNDDATAOBJECT_QueryGetData(IDataObject *dataObject,
 729                                                   FORMATETC *formatEtc)
 730 {
 731     char formatDesc[1024];
 732     XDNDDATA *current;
 733
 734     TRACE("(%p, %p={.tymed=0x%x, .dwAspect=%d, .cfFormat=%d}\n",
 735         dataObject, formatEtc, formatEtc->tymed, formatEtc->dwAspect, formatEtc->cfFormat);
 736     X11DRV_XDND_DescribeClipboardFormat(formatEtc->cfFormat, formatDesc, sizeof(formatDesc));
 737
 738     if (formatEtc->tymed && !(formatEtc->tymed & TYMED_HGLOBAL))
 739     {
 740         FIXME("only HGLOBAL medium types supported right now\n");
 741         return DV_E_TYMED;
 742     }
 743     if (formatEtc->dwAspect != DVASPECT_CONTENT)
 744     {
 745         FIXME("only the content aspect is supported right now\n");
 746         return E_NOTIMPL;
 747     }
 748
 749     LIST_FOR_EACH_ENTRY(current, &xdndData, XDNDDATA, entry)
 750     {
 751         if (current->cf_win == formatEtc->cfFormat)
 752         {
 753             TRACE("application found %s\n", formatDesc);
 754             return S_OK;
 755         }
 756     }
 757     TRACE("application didn't find %s\n", formatDesc);
 758     return DV_E_FORMATETC;
 759 }
 760
 761 static HRESULT WINAPI XDNDDATAOBJECT_GetCanonicalFormatEtc(IDataObject *dataObject,
 762                                                            FORMATETC *formatEtc,
 763                                                            FORMATETC *formatEtcOut)
 764 {
 765     FIXME("(%p, %p, %p): stub\n", dataObject, formatEtc, formatEtcOut);
 766     formatEtcOut->ptd = NULL;
 767     return E_NOTIMPL;
 768 }
 769
 770 static HRESULT WINAPI XDNDDATAOBJECT_SetData(IDataObject *dataObject,
 771                                              FORMATETC *formatEtc,
 772                                              STGMEDIUM *pMedium, BOOL fRelease)
 773 {
 774     FIXME("(%p, %p, %p, %s): stub\n", dataObject, formatEtc,
 775         pMedium, fRelease?"TRUE":"FALSE");
 776     return E_NOTIMPL;
 777 }
 778
 779 static HRESULT WINAPI XDNDDATAOBJECT_EnumFormatEtc(IDataObject *dataObject,
 780                                                    DWORD dwDirection,
 781                                                    IEnumFORMATETC **ppEnumFormatEtc)
 782 {
 783     DWORD count;
 784     FORMATETC *formats;
 785
 786     TRACE("(%p, %u, %p)\n", dataObject, dwDirection, ppEnumFormatEtc);
 787
 788     if (dwDirection != DATADIR_GET)
 789     {
 790         FIXME("only the get direction is implemented\n");
 791         return E_NOTIMPL;
 792     }
 793
 794     count = list_count(&xdndData);
 795     formats = HeapAlloc(GetProcessHeap(), 0, count * sizeof(FORMATETC));
 796     if (formats)
 797     {
 798         XDNDDATA *current;
 799         DWORD i = 0;
 800         HRESULT hr;
 801         LIST_FOR_EACH_ENTRY(current, &xdndData, XDNDDATA, entry)
 802         {
 803             formats[i].cfFormat = current->cf_win;
 804             formats[i].ptd = NULL;
 805             formats[i].dwAspect = DVASPECT_CONTENT;
 806             formats[i].lindex = -1;
 807             formats[i].tymed = TYMED_HGLOBAL;
 808             i++;
 809         }
 810         hr = SHCreateStdEnumFmtEtc(count, formats, ppEnumFormatEtc);
 811         HeapFree(GetProcessHeap(), 0, formats);
 812         return hr;
 813     }
 814     else
 815         return E_OUTOFMEMORY;
 816 }
 817
 818 static HRESULT WINAPI XDNDDATAOBJECT_DAdvise(IDataObject *dataObject,
 819                                              FORMATETC *formatEtc, DWORD advf,
 820                                              IAdviseSink *adviseSink,
 821                                              DWORD *pdwConnection)
 822 {
 823     FIXME("(%p, %p, %u, %p, %p): stub\n", dataObject, formatEtc, advf,
 824         adviseSink, pdwConnection);
 825     return OLE_E_ADVISENOTSUPPORTED;
 826 }
 827
 828 static HRESULT WINAPI XDNDDATAOBJECT_DUnadvise(IDataObject *dataObject,
 829                                                DWORD dwConnection)
 830 {
 831     FIXME("(%p, %u): stub\n", dataObject, dwConnection);
 832     return OLE_E_ADVISENOTSUPPORTED;
 833 }
 834
 835 static HRESULT WINAPI XDNDDATAOBJECT_EnumDAdvise(IDataObject *dataObject,
 836                                                  IEnumSTATDATA **pEnumAdvise)
 837 {
 838     FIXME("(%p, %p): stub\n", dataObject, pEnumAdvise);
 839     return OLE_E_ADVISENOTSUPPORTED;
 840 }
 841
 842 static IDataObjectVtbl xdndDataObjectVtbl =
 843 {
 844     XDNDDATAOBJECT_QueryInterface,
 845     XDNDDATAOBJECT_AddRef,
 846     XDNDDATAOBJECT_Release,
 847     XDNDDATAOBJECT_GetData,
 848     XDNDDATAOBJECT_GetDataHere,
 849     XDNDDATAOBJECT_QueryGetData,
 850     XDNDDATAOBJECT_GetCanonicalFormatEtc,
 851     XDNDDATAOBJECT_SetData,
 852     XDNDDATAOBJECT_EnumFormatEtc,
 853     XDNDDATAOBJECT_DAdvise,
 854     XDNDDATAOBJECT_DUnadvise,
 855     XDNDDATAOBJECT_EnumDAdvise
 856 };
 857
 858 static IDataObject XDNDDataObject = { &xdndDataObjectVtbl };