dlls/user32/clipboard.c

   1 /*
   2  * WIN32 clipboard implementation
   3  *
   4  * Copyright 1994 Martin Ayotte
   5  *           1996 Alex Korobka
   6  *           1999 Noel Borthwick
   7  *           2003 Ulrich Czekalla for CodeWeavers
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  *
  23  * NOTES:
  24  *    This file contains the implementation for the WIN32 Clipboard API
  25  * and Wine's internal clipboard cache.
  26  * The actual contents of the clipboard are held in the clipboard cache.
  27  * The internal implementation talks to a "clipboard driver" to fill or
  28  * expose the cache to the native device. (Currently only the X11 and
  29  * TTY clipboard  driver are available)
  30  */
  31
  32 #include "config.h"
  33 #include "wine/port.h"
  34
  35 #include <stdarg.h>
  36 #include <stdlib.h>
  37 #include <sys/types.h>
  38 #include <fcntl.h>
  39 #ifdef HAVE_UNISTD_H
  40 # include <unistd.h>
  41 #endif
  42 #include <string.h>
  43
  44 #include "windef.h"
  45 #include "winbase.h"
  46 #include "wingdi.h"
  47 #include "winuser.h"
  48 #include "winerror.h"
  49 #include "wine/winuser16.h"
  50 #include "wine/winbase16.h"
  51 #include "user_private.h"
  52 #include "win.h"
  53
  54 #include "wine/debug.h"
  55 #include "wine/unicode.h"
  56 #include "wine/server.h"
  57
  58 WINE_DEFAULT_DEBUG_CHANNEL(clipboard);
  59
  60 #define  CF_REGFORMATBASE  0xC000
  61
  62 typedef struct
  63 {
  64     HWND hWndOpen;
  65     HWND hWndOwner;
  66     HWND hWndViewer;
  67     UINT seqno;
  68     UINT flags;
  69 } CLIPBOARDINFO, *LPCLIPBOARDINFO;
  70
  71 /*
  72  * Indicates if data has changed since open.
  73  */
  74 static BOOL bCBHasChanged = FALSE;
  75
  76
  77 /**************************************************************************
  78  *                      CLIPBOARD_SetClipboardOwner
  79  *
  80  * Set the global wineserver clipboard owner. The current process will
  81  * be the owner and <hWnd> will get the render notifications.
  82  */
  83 static BOOL CLIPBOARD_SetClipboardOwner(HWND hWnd)
  84 {
  85     BOOL bRet = FALSE;
  86
  87     TRACE(" hWnd(%p)\n", hWnd);
  88
  89     SERVER_START_REQ( set_clipboard_info )
  90     {
  91         req->flags = SET_CB_OWNER;
  92         req->owner = WIN_GetFullHandle( hWnd );
  93
  94         if (wine_server_call_err( req ))
  95         {
  96             ERR("Failed to set clipboard owner to %p\n", hWnd);
  97         }
  98         else
  99         {
 100             bRet = TRUE;
 101         }
 102     }
 103     SERVER_END_REQ;
 104
 105     return bRet;
 106 }
 107
 108
 109 /**************************************************************************
 110  *                      CLIPBOARD_GetClipboardInfo
 111  */
 112 static BOOL CLIPBOARD_GetClipboardInfo(LPCLIPBOARDINFO cbInfo)
 113 {
 114     BOOL bRet = FALSE;
 115
 116     SERVER_START_REQ( set_clipboard_info )
 117     {
 118         req->flags = 0;
 119
 120         if (wine_server_call_err( req ))
 121         {
 122             ERR("Failed to get clipboard info\n");
 123         }
 124         else
 125         {
 126             cbInfo->hWndOpen = reply->old_clipboard;
 127             cbInfo->hWndOwner = reply->old_owner;
 128             cbInfo->hWndViewer = reply->old_viewer;
 129             cbInfo->seqno = reply->seqno;
 130             cbInfo->flags = reply->flags;
 131
 132             bRet = TRUE;
 133         }
 134     }
 135     SERVER_END_REQ;
 136
 137     return bRet;
 138 }
 139
 140
 141 /**************************************************************************
 142  *      CLIPBOARD_ReleaseOwner
 143  */
 144 BOOL CLIPBOARD_ReleaseOwner(void)
 145 {
 146     BOOL bRet = FALSE;
 147
 148     SERVER_START_REQ( set_clipboard_info )
 149     {
 150         req->flags = SET_CB_RELOWNER | SET_CB_SEQNO;
 151
 152         if (wine_server_call_err( req ))
 153         {
 154             ERR("Failed to set clipboard.\n");
 155         }
 156         else
 157         {
 158             bRet = TRUE;
 159         }
 160     }
 161     SERVER_END_REQ;
 162
 163     return bRet;
 164 }
 165
 166
 167 /**************************************************************************
 168  *              CLIPBOARD_OpenClipboard
 169  */
 170 static BOOL CLIPBOARD_OpenClipboard(HWND hWnd)
 171 {
 172     BOOL bRet = FALSE;
 173
 174     SERVER_START_REQ( set_clipboard_info )
 175     {
 176         req->flags = SET_CB_OPEN;
 177         req->clipboard = WIN_GetFullHandle( hWnd );
 178
 179         if (!wine_server_call( req ))
 180             bRet = TRUE;
 181     }
 182     SERVER_END_REQ;
 183
 184     return bRet;
 185 }
 186
 187
 188 /**************************************************************************
 189  *              CLIPBOARD_CloseClipboard
 190  */
 191 static BOOL CLIPBOARD_CloseClipboard(void)
 192 {
 193     BOOL bRet = FALSE;
 194
 195     TRACE(" Changed=%d\n", bCBHasChanged);
 196
 197     SERVER_START_REQ( set_clipboard_info )
 198     {
 199         req->flags = SET_CB_CLOSE;
 200
 201         if (bCBHasChanged)
 202         {
 203             req->flags |= SET_CB_SEQNO;
 204             TRACE("Clipboard data changed\n");
 205         }
 206
 207         if (wine_server_call_err( req ))
 208         {
 209             ERR("Failed to set clipboard.\n");
 210         }
 211         else
 212         {
 213             bRet = TRUE;
 214         }
 215     }
 216     SERVER_END_REQ;
 217
 218     return bRet;
 219 }
 220
 221
 222 /**************************************************************************
 223  *                WIN32 Clipboard implementation
 224  **************************************************************************/
 225
 226 /**************************************************************************
 227  *              RegisterClipboardFormatW (USER32.@)
 228  */
 229 UINT WINAPI RegisterClipboardFormatW(LPCWSTR FormatName)
 230 {
 231     return USER_Driver->pRegisterClipboardFormat(FormatName);
 232 }
 233
 234
 235 /**************************************************************************
 236  *              RegisterClipboardFormatA (USER32.@)
 237  */
 238 UINT WINAPI RegisterClipboardFormatA(LPCSTR formatName)
 239 {
 240     int len;
 241     LPWSTR wFormat;
 242     UINT ret;
 243
 244     len = MultiByteToWideChar(CP_ACP, 0, formatName, -1, NULL, 0);
 245     wFormat = HeapAlloc(GetProcessHeap(), 0, len*sizeof(WCHAR));
 246     MultiByteToWideChar(CP_ACP, 0, formatName, -1, wFormat, len);
 247
 248     ret = RegisterClipboardFormatW(wFormat);
 249     HeapFree(GetProcessHeap(), 0, wFormat);
 250     return ret;
 251 }
 252
 253
 254 /**************************************************************************
 255  *              GetClipboardFormatNameW (USER32.@)
 256  */
 257 INT WINAPI GetClipboardFormatNameW(UINT wFormat, LPWSTR retStr, INT maxlen)
 258 {
 259     return USER_Driver->pGetClipboardFormatName(wFormat, retStr, maxlen);
 260 }
 261
 262
 263 /**************************************************************************
 264  *              GetClipboardFormatNameA (USER32.@)
 265  */
 266 INT WINAPI GetClipboardFormatNameA(UINT wFormat, LPSTR retStr, INT maxlen)
 267 {
 268     INT ret;
 269     LPWSTR p = HeapAlloc( GetProcessHeap(), 0, maxlen*sizeof(WCHAR) );
 270     if(p == NULL) return 0; /* FIXME: is this the correct failure value? */
 271
 272     ret = GetClipboardFormatNameW( wFormat, p, maxlen );
 273
 274     if (ret && maxlen > 0 && !WideCharToMultiByte( CP_ACP, 0, p, -1, retStr, maxlen, 0, 0))
 275         retStr[maxlen-1] = 0;
 276     HeapFree( GetProcessHeap(), 0, p );
 277     return ret;
 278 }
 279
 280
 281 /**************************************************************************
 282  *              OpenClipboard (USER32.@)
 283  *
 284  * Note: Netscape uses NULL hWnd to open the clipboard.
 285  */
 286 BOOL WINAPI OpenClipboard( HWND hWnd )
 287 {
 288     BOOL bRet;
 289
 290     TRACE("(%p)...\n", hWnd);
 291
 292     bRet = CLIPBOARD_OpenClipboard(hWnd);
 293
 294     TRACE(" returning %i\n", bRet);
 295
 296     return bRet;
 297 }
 298
 299
 300 /**************************************************************************
 301  *              CloseClipboard (USER32.@)
 302  */
 303 BOOL WINAPI CloseClipboard(void)
 304 {
 305     BOOL bRet = FALSE;
 306
 307     TRACE("(%d)\n", bCBHasChanged);
 308
 309     if (CLIPBOARD_CloseClipboard())
 310     {
 311         if (bCBHasChanged)
 312         {
 313             HWND hWndViewer = GetClipboardViewer();
 314
 315             USER_Driver->pEndClipboardUpdate();
 316
 317             if (hWndViewer)
 318                 SendMessageW(hWndViewer, WM_DRAWCLIPBOARD, 0, 0);
 319
 320             bCBHasChanged = FALSE;
 321         }
 322
 323         bRet = TRUE;
 324     }
 325
 326     return bRet;
 327 }
 328
 329
 330 /**************************************************************************
 331  *              EmptyClipboard (USER32.@)
 332  * Empties and acquires ownership of the clipboard
 333  */
 334 BOOL WINAPI EmptyClipboard(void)
 335 {
 336     CLIPBOARDINFO cbinfo;
 337
 338     TRACE("()\n");
 339
 340     if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
 341         ~cbinfo.flags & CB_OPEN)
 342     {
 343         WARN("Clipboard not opened by calling task!\n");
 344         SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
 345         return FALSE;
 346     }
 347
 348     /* Destroy private objects */
 349     if (cbinfo.hWndOwner)
 350         SendMessageW(cbinfo.hWndOwner, WM_DESTROYCLIPBOARD, 0, 0);
 351
 352     /* Tell the driver to acquire the selection. The current owner
 353      * will be signaled to delete it's own cache. */
 354
 355     /* Assign ownership of the clipboard to the current client. We do
 356      * this before acquiring the selection so that when we do acquire the
 357      * selection and the selection loser gets notified, it can check if
 358      * it has lost the Wine clipboard ownership. If it did then it knows
 359      * that a WM_DESTORYCLIPBOARD has already been sent. Otherwise it
 360      * lost the selection to a X app and it should send the
 361      * WM_DESTROYCLIPBOARD itself. */
 362     CLIPBOARD_SetClipboardOwner(cbinfo.hWndOpen);
 363
 364     /* Acquire the selection. This will notify the previous owner
 365      * to clear it's cache. */
 366     USER_Driver->pAcquireClipboard(cbinfo.hWndOpen);
 367
 368     /* Empty the local cache */
 369     USER_Driver->pEmptyClipboard(FALSE);
 370
 371     bCBHasChanged = TRUE;
 372
 373     return TRUE;
 374 }
 375
 376
 377 /**************************************************************************
 378  *              GetClipboardOwner (USER32.@)
 379  *  FIXME: Can't return the owner if the clipboard is owned by an external X-app
 380  */
 381 HWND WINAPI GetClipboardOwner(void)
 382 {
 383     HWND hWndOwner = 0;
 384
 385     SERVER_START_REQ( set_clipboard_info )
 386     {
 387         req->flags = 0;
 388         if (!wine_server_call_err( req )) hWndOwner = reply->old_owner;
 389     }
 390     SERVER_END_REQ;
 391
 392     TRACE(" hWndOwner(%p)\n", hWndOwner);
 393
 394     return hWndOwner;
 395 }
 396
 397
 398 /**************************************************************************
 399  *              GetOpenClipboardWindow (USER32.@)
 400  */
 401 HWND WINAPI GetOpenClipboardWindow(void)
 402 {
 403     HWND hWndOpen = 0;
 404
 405     SERVER_START_REQ( set_clipboard_info )
 406     {
 407         req->flags = 0;
 408         if (!wine_server_call_err( req )) hWndOpen = reply->old_clipboard;
 409     }
 410     SERVER_END_REQ;
 411
 412     TRACE(" hWndClipWindow(%p)\n", hWndOpen);
 413
 414     return hWndOpen;
 415 }
 416
 417
 418 /**************************************************************************
 419  *              SetClipboardViewer (USER32.@)
 420  */
 421 HWND WINAPI SetClipboardViewer( HWND hWnd )
 422 {
 423     HWND hwndPrev = 0;
 424
 425     SERVER_START_REQ( set_clipboard_info )
 426     {
 427         req->flags = SET_CB_VIEWER;
 428         req->viewer = WIN_GetFullHandle(hWnd);
 429
 430         if (wine_server_call_err( req ))
 431         {
 432             ERR("Failed to set clipboard.\n");
 433         }
 434         else
 435         {
 436             hwndPrev = reply->old_viewer;
 437         }
 438     }
 439     SERVER_END_REQ;
 440
 441     TRACE("(%p): returning %p\n", hWnd, hwndPrev);
 442
 443     return hwndPrev;
 444 }
 445
 446
 447 /**************************************************************************
 448  *              GetClipboardViewer (USER32.@)
 449  */
 450 HWND WINAPI GetClipboardViewer(void)
 451 {
 452     HWND hWndViewer = 0;
 453
 454     SERVER_START_REQ( set_clipboard_info )
 455     {
 456         req->flags = 0;
 457         if (!wine_server_call_err( req )) hWndViewer = reply->old_viewer;
 458     }
 459     SERVER_END_REQ;
 460
 461     TRACE(" hWndViewer=%p\n", hWndViewer);
 462
 463     return hWndViewer;
 464 }
 465
 466
 467 /**************************************************************************
 468  *              ChangeClipboardChain (USER32.@)
 469  */
 470 BOOL WINAPI ChangeClipboardChain(HWND hWnd, HWND hWndNext)
 471 {
 472     BOOL bRet = TRUE;
 473     HWND hWndViewer = GetClipboardViewer();
 474
 475     if (hWndViewer)
 476     {
 477         if (WIN_GetFullHandle(hWnd) == hWndViewer)
 478             SetClipboardViewer(WIN_GetFullHandle(hWndNext));
 479         else
 480             bRet = !SendMessageW(hWndViewer, WM_CHANGECBCHAIN, (WPARAM)hWnd, (LPARAM)hWndNext);
 481     }
 482     else
 483         ERR("hWndViewer is lost\n");
 484
 485     return bRet;
 486 }
 487
 488
 489 /**************************************************************************
 490  *              SetClipboardData (USER.141)
 491  */
 492 HANDLE16 WINAPI SetClipboardData16(UINT16 wFormat, HANDLE16 hData)
 493 {
 494     CLIPBOARDINFO cbinfo;
 495     HANDLE16 hResult = 0;
 496
 497     TRACE("(%04X, %04x) !\n", wFormat, hData);
 498
 499     /* If it's not owned, data can only be set if the format doesn't exists
 500        and its rendering is not delayed */
 501     if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
 502         (!(cbinfo.flags & CB_OWNER) && !hData))
 503     {
 504         WARN("Clipboard not owned by calling task. Operation failed.\n");
 505         return 0;
 506     }
 507
 508     if (USER_Driver->pSetClipboardData(wFormat, hData, 0, cbinfo.flags & CB_OWNER))
 509     {
 510         hResult = hData;
 511         bCBHasChanged = TRUE;
 512     }
 513
 514     return hResult;
 515 }
 516
 517
 518 /**************************************************************************
 519  *              SetClipboardData (USER32.@)
 520  */
 521 HANDLE WINAPI SetClipboardData(UINT wFormat, HANDLE hData)
 522 {
 523     CLIPBOARDINFO cbinfo;
 524     HANDLE hResult = 0;
 525
 526     TRACE("(%04X, %p) !\n", wFormat, hData);
 527
 528     /* If it's not owned, data can only be set if the format isn't
 529        available and its rendering is not delayed */
 530     if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
 531        (!(cbinfo.flags & CB_OWNER) && !hData))
 532     {
 533         WARN("Clipboard not owned by calling task. Operation failed.\n");
 534         return 0;
 535     }
 536
 537     if (USER_Driver->pSetClipboardData(wFormat, 0, hData, cbinfo.flags & CB_OWNER))
 538     {
 539         hResult = hData;
 540         bCBHasChanged = TRUE;
 541     }
 542
 543     return hResult;
 544 }
 545
 546
 547 /**************************************************************************
 548  *              CountClipboardFormats (USER32.@)
 549  */
 550 INT WINAPI CountClipboardFormats(void)
 551 {
 552     INT count = USER_Driver->pCountClipboardFormats();
 553     TRACE("returning %d\n", count);
 554     return count;
 555 }
 556
 557
 558 /**************************************************************************
 559  *              EnumClipboardFormats (USER32.@)
 560  */
 561 UINT WINAPI EnumClipboardFormats(UINT wFormat)
 562 {
 563     CLIPBOARDINFO cbinfo;
 564
 565     TRACE("(%04X)\n", wFormat);
 566
 567     if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
 568         (~cbinfo.flags & CB_OPEN))
 569     {
 570         WARN("Clipboard not opened by calling task.\n");
 571         SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
 572         return 0;
 573     }
 574     return USER_Driver->pEnumClipboardFormats(wFormat);
 575 }
 576
 577
 578 /**************************************************************************
 579  *              IsClipboardFormatAvailable (USER32.@)
 580  */
 581 BOOL WINAPI IsClipboardFormatAvailable(UINT wFormat)
 582 {
 583     BOOL bret = USER_Driver->pIsClipboardFormatAvailable(wFormat);
 584     TRACE("%04x, returning %d\n", wFormat, bret);
 585     return bret;
 586 }
 587
 588
 589 /**************************************************************************
 590  *              GetClipboardData (USER.142)
 591  */
 592 HANDLE16 WINAPI GetClipboardData16(UINT16 wFormat)
 593 {
 594     HANDLE16 hData = 0;
 595     CLIPBOARDINFO cbinfo;
 596
 597     if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
 598         (~cbinfo.flags & CB_OPEN))
 599     {
 600         WARN("Clipboard not opened by calling task.\n");
 601         SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
 602         return 0;
 603     }
 604
 605     if (!USER_Driver->pGetClipboardData(wFormat, &hData, NULL)) hData = 0;
 606
 607     return hData;
 608 }
 609
 610
 611 /**************************************************************************
 612  *              GetClipboardData (USER32.@)
 613  */
 614 HANDLE WINAPI GetClipboardData(UINT wFormat)
 615 {
 616     HANDLE hData = 0;
 617     CLIPBOARDINFO cbinfo;
 618
 619     TRACE("%04x\n", wFormat);
 620
 621     if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
 622         (~cbinfo.flags & CB_OPEN))
 623     {
 624         WARN("Clipboard not opened by calling task.\n");
 625         SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
 626         return 0;
 627     }
 628
 629     if (!USER_Driver->pGetClipboardData(wFormat, NULL, &hData)) hData = 0;
 630
 631     TRACE("returning %p\n", hData);
 632     return hData;
 633 }
 634
 635
 636 /**************************************************************************
 637  *              GetPriorityClipboardFormat (USER32.@)
 638  */
 639 INT WINAPI GetPriorityClipboardFormat(UINT *list, INT nCount)
 640 {
 641     int i;
 642
 643     TRACE("()\n");
 644
 645     if(CountClipboardFormats() == 0)
 646         return 0;
 647
 648     for (i = 0; i < nCount; i++)
 649         if (IsClipboardFormatAvailable(list[i]))
 650             return list[i];
 651
 652     return -1;
 653 }
 654
 655
 656 /**************************************************************************
 657  *              GetClipboardSequenceNumber (USER32.@)
 658  * Supported on Win2k/Win98
 659  * MSDN: Windows clipboard code keeps a serial number for the clipboard
 660  * for each window station.  The number is incremented whenever the
 661  * contents change or are emptied.
 662  * If you do not have WINSTA_ACCESSCLIPBOARD then the function returns 0
 663  */
 664 DWORD WINAPI GetClipboardSequenceNumber(VOID)
 665 {
 666     DWORD seqno = 0;
 667
 668     SERVER_START_REQ( set_clipboard_info )
 669     {
 670         req->flags = 0;
 671         if (!wine_server_call_err( req )) seqno = reply->seqno;
 672     }
 673     SERVER_END_REQ;
 674
 675     TRACE("returning %x\n", seqno);
 676     return seqno;
 677 }