reactos/subsys/win32k/ntuser/painting.c

   1 /*
   2  *  ReactOS W32 Subsystem
   3  *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *  $Id$
  20  *
  21  *  COPYRIGHT:        See COPYING in the top level directory
  22  *  PROJECT:          ReactOS kernel
  23  *  PURPOSE:          Window painting function
  24  *  FILE:             subsys/win32k/ntuser/painting.c
  25  *  PROGRAMER:        Filip Navara (xnavara@volny.cz)
  26  *  REVISION HISTORY:
  27  *       06/06/2001   Created (?)
  28  *       18/11/2003   Complete rewrite
  29  */
  30
  31 /* INCLUDES ******************************************************************/
  32
  33 #include <w32k.h>
  34
  35 #define NDEBUG
  36 #include <debug.h>
  37
  38 /* PRIVATE FUNCTIONS **********************************************************/
  39
  40 /**
  41  * @name IntIntersectWithParents
  42  *
  43  * Intersect window rectangle with all parent client rectangles.
  44  *
  45  * @param Child
  46  *        Pointer to child window to start intersecting from.
  47  * @param WindowRect
  48  *        Pointer to rectangle that we want to intersect in screen
  49  *        coordinates on input and intersected rectangle on output (if TRUE
  50  *        is returned).
  51  *
  52  * @return
  53  *    If any parent is minimized or invisible or the resulting rectangle
  54  *    is empty then FALSE is returned. Otherwise TRUE is returned.
  55  */
  56
  57 BOOL FASTCALL
  58 IntIntersectWithParents(PWINDOW_OBJECT Child, PRECT WindowRect)
  59 {
  60    PWINDOW_OBJECT ParentWindow;
  61
  62    ParentWindow = Child->Parent;
  63    while (ParentWindow != NULL)
  64    {
  65       if (!(ParentWindow->Style & WS_VISIBLE) ||
  66           (ParentWindow->Style & WS_MINIMIZE))
  67       {
  68          return FALSE;
  69       }
  70
  71       if (!IntGdiIntersectRect(WindowRect, WindowRect, &ParentWindow->ClientRect))
  72       {
  73          return FALSE;
  74       }
  75
  76       /* FIXME: Layered windows. */
  77
  78       ParentWindow = ParentWindow->Parent;
  79    }
  80
  81    return TRUE;
  82 }
  83
  84 VOID FASTCALL
  85 IntValidateParent(PWINDOW_OBJECT Child, HRGN ValidRegion)
  86 {
  87    PWINDOW_OBJECT ParentWindow = Child->Parent;
  88
  89    while (ParentWindow)
  90    {
  91       if (ParentWindow->Style & WS_CLIPCHILDREN)
  92          break;
  93
  94       if (ParentWindow->UpdateRegion != 0)
  95       {
  96          NtGdiCombineRgn(ParentWindow->UpdateRegion, ParentWindow->UpdateRegion,
  97             ValidRegion, RGN_DIFF);
  98          /* FIXME: If the resulting region is empty, remove fake posted paint message */
  99       }
 100
 101       ParentWindow = ParentWindow->Parent;
 102    }
 103 }
 104
 105 /**
 106  * @name IntCalcWindowRgn
 107  *
 108  * Get a window or client region.
 109  */
 110
 111 HRGN FASTCALL
 112 IntCalcWindowRgn(PWINDOW_OBJECT Window, BOOL Client)
 113 {
 114    HRGN hRgnWindow;
 115    UINT RgnType;
 116
 117    if (Client)
 118       hRgnWindow = UnsafeIntCreateRectRgnIndirect(&Window->ClientRect);
 119    else
 120       hRgnWindow = UnsafeIntCreateRectRgnIndirect(&Window->WindowRect);
 121
 122    if (Window->WindowRegion != NULL && !(Window->Style & WS_MINIMIZE))
 123    {
 124       NtGdiOffsetRgn(hRgnWindow,
 125          -Window->WindowRect.left,
 126          -Window->WindowRect.top);
 127       RgnType = NtGdiCombineRgn(hRgnWindow, hRgnWindow, Window->WindowRegion, RGN_AND);
 128       NtGdiOffsetRgn(hRgnWindow,
 129          Window->WindowRect.left,
 130          Window->WindowRect.top);
 131    }
 132
 133    return hRgnWindow;
 134 }
 135
 136 /**
 137  * @name IntGetNCUpdateRgn
 138  *
 139  * Get non-client update region of a window and optionally validate it.
 140  *
 141  * @param Window
 142  *        Pointer to window to get the NC update region from.
 143  * @param Validate
 144  *        Set to TRUE to force validating the NC update region.
 145  *
 146  * @return
 147  *    Handle to NC update region. The caller is responsible for deleting
 148  *    it.
 149  */
 150
 151 HRGN FASTCALL
 152 IntGetNCUpdateRgn(PWINDOW_OBJECT Window, BOOL Validate)
 153 {
 154    HRGN hRgnNonClient;
 155    HRGN hRgnWindow;
 156    UINT RgnType;
 157
 158    if (Window->UpdateRegion != NULL &&
 159        Window->UpdateRegion != (HRGN)1)
 160    {
 161       hRgnNonClient = NtGdiCreateRectRgn(0, 0, 0, 0);
 162       hRgnWindow = IntCalcWindowRgn(Window, TRUE);
 163
 164       /*
 165        * If region creation fails it's safe to fallback to whole
 166        * window region.
 167        */
 168
 169       if (hRgnNonClient == NULL)
 170       {
 171          return (HRGN)1;
 172       }
 173
 174       RgnType = NtGdiCombineRgn(hRgnNonClient, Window->UpdateRegion,
 175                                 hRgnWindow, RGN_DIFF);
 176       if (RgnType == ERROR)
 177       {
 178          NtGdiDeleteObject(hRgnNonClient);
 179          return (HRGN)1;
 180       }
 181       else if (RgnType == NULLREGION)
 182       {
 183          NtGdiDeleteObject(hRgnNonClient);
 184          return NULL;
 185       }
 186
 187       /*
 188        * Remove the nonclient region from the standard update region if
 189        * we were asked for it.
 190        */
 191
 192       if (Validate)
 193       {
 194          if (NtGdiCombineRgn(Window->UpdateRegion, Window->UpdateRegion,
 195                              hRgnWindow, RGN_AND) == NULLREGION)
 196          {
 197             GDIOBJ_SetOwnership(Window->UpdateRegion, PsGetCurrentProcess());
 198             NtGdiDeleteObject(Window->UpdateRegion);
 199             Window->UpdateRegion = NULL;
 200             if (!(Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT))
 201                MsqDecPaintCountQueue(Window->MessageQueue);
 202          }
 203       }
 204
 205       NtGdiDeleteObject(hRgnWindow);
 206
 207       return hRgnNonClient;
 208    }
 209    else
 210    {
 211       return Window->UpdateRegion;
 212    }
 213 }
 214
 215 /*
 216  * IntPaintWindows
 217  *
 218  * Internal function used by IntRedrawWindow.
 219  */
 220
 221 STATIC VOID FASTCALL
 222 co_IntPaintWindows(PWINDOW_OBJECT Window, ULONG Flags)
 223 {
 224    HDC hDC;
 225    HWND hWnd = Window->hSelf;
 226    HRGN TempRegion;
 227
 228    if (Flags & (RDW_ERASENOW | RDW_UPDATENOW))
 229    {
 230       if (Window->UpdateRegion)
 231       {
 232          IntValidateParent(Window, Window->UpdateRegion);
 233       }
 234
 235       if (Flags & RDW_UPDATENOW)
 236       {
 237          if (Window->UpdateRegion != NULL ||
 238              Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT)
 239          {
 240             co_IntSendMessage(hWnd, WM_PAINT, 0, 0);
 241          }
 242       }
 243       else
 244       {
 245          if (Window->Flags & WINDOWOBJECT_NEED_NCPAINT)
 246          {
 247             TempRegion = IntGetNCUpdateRgn(Window, TRUE);
 248             Window->Flags &= ~WINDOWOBJECT_NEED_NCPAINT;
 249             MsqDecPaintCountQueue(Window->MessageQueue);
 250             co_IntSendMessage(hWnd, WM_NCPAINT, (WPARAM)TempRegion, 0);
 251             if ((HANDLE) 1 != TempRegion && NULL != TempRegion)
 252             {
 253                /* NOTE: The region can already be deleted! */
 254                GDIOBJ_FreeObj(TempRegion, GDI_OBJECT_TYPE_REGION | GDI_OBJECT_TYPE_SILENT);
 255             }
 256          }
 257
 258          if (Window->Flags & WINDOWOBJECT_NEED_ERASEBKGND)
 259          {
 260             if (Window->UpdateRegion)
 261             {
 262                hDC = UserGetDCEx(Window, Window->UpdateRegion,
 263                                  DCX_CACHE | DCX_USESTYLE |
 264                                  DCX_INTERSECTRGN | DCX_KEEPCLIPRGN);
 265                if (co_IntSendMessage(hWnd, WM_ERASEBKGND, (WPARAM)hDC, 0))
 266                {
 267                   Window->Flags &= ~WINDOWOBJECT_NEED_ERASEBKGND;
 268                }
 269                UserReleaseDC(Window, hDC, FALSE);
 270             }
 271          }
 272       }
 273    }
 274
 275    /*
 276     * Check that the window is still valid at this point
 277     */
 278    if (!IntIsWindow(hWnd))
 279    {
 280       return;
 281    }
 282
 283    /*
 284     * Paint child windows.
 285     */
 286    if (!(Flags & RDW_NOCHILDREN) && !(Window->Style & WS_MINIMIZE) &&
 287        ((Flags & RDW_ALLCHILDREN) || !(Window->Style & WS_CLIPCHILDREN)))
 288    {
 289       HWND *List, *phWnd;
 290
 291       if ((List = IntWinListChildren(Window)))
 292       {
 293          for (phWnd = List; *phWnd; ++phWnd)
 294          {
 295             Window = UserGetWindowObject(*phWnd);
 296             if (Window && (Window->Style & WS_VISIBLE))
 297             {
 298                USER_REFERENCE_ENTRY Ref;
 299                UserRefObjectCo(Window, &Ref);
 300                co_IntPaintWindows(Window, Flags);
 301                UserDerefObjectCo(Window);
 302             }
 303          }
 304          ExFreePool(List);
 305       }
 306    }
 307 }
 308
 309 /*
 310  * IntInvalidateWindows
 311  *
 312  * Internal function used by IntRedrawWindow.
 313  */
 314
 315 VOID FASTCALL
 316 IntInvalidateWindows(PWINDOW_OBJECT Window, HRGN hRgn, ULONG Flags)
 317 {
 318    INT RgnType;
 319    BOOL HadPaintMessage, HadNCPaintMessage;
 320    BOOL HasPaintMessage, HasNCPaintMessage;
 321
 322    /*
 323     * Clip the given region with window rectangle (or region)
 324     */
 325
 326    if (!Window->WindowRegion || (Window->Style & WS_MINIMIZE))
 327    {
 328       HRGN hRgnWindow;
 329
 330       hRgnWindow = UnsafeIntCreateRectRgnIndirect(&Window->WindowRect);
 331       RgnType = NtGdiCombineRgn(hRgn, hRgn, hRgnWindow, RGN_AND);
 332       NtGdiDeleteObject(hRgnWindow);
 333    }
 334    else
 335    {
 336       NtGdiOffsetRgn(hRgn,
 337          -Window->WindowRect.left,
 338          -Window->WindowRect.top);
 339       RgnType = NtGdiCombineRgn(hRgn, hRgn, Window->WindowRegion, RGN_AND);
 340       NtGdiOffsetRgn(hRgn,
 341          Window->WindowRect.left,
 342          Window->WindowRect.top);
 343    }
 344
 345    /*
 346     * Save current state of pending updates
 347     */
 348
 349    HadPaintMessage = Window->UpdateRegion != NULL ||
 350                      Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT;
 351    HadNCPaintMessage = Window->Flags & WINDOWOBJECT_NEED_NCPAINT;
 352
 353    /*
 354     * Update the region and flags
 355     */
 356
 357    if (Flags & RDW_INVALIDATE && RgnType != NULLREGION)
 358    {
 359       if (Window->UpdateRegion == NULL)
 360       {
 361          Window->UpdateRegion = NtGdiCreateRectRgn(0, 0, 0, 0);
 362          GDIOBJ_SetOwnership(Window->UpdateRegion, NULL);
 363       }
 364
 365       if (NtGdiCombineRgn(Window->UpdateRegion, Window->UpdateRegion,
 366                           hRgn, RGN_OR) == NULLREGION)
 367       {
 368          GDIOBJ_SetOwnership(Window->UpdateRegion, PsGetCurrentProcess());
 369          NtGdiDeleteObject(Window->UpdateRegion);
 370          Window->UpdateRegion = NULL;
 371       }
 372
 373       if (Flags & RDW_FRAME)
 374          Window->Flags |= WINDOWOBJECT_NEED_NCPAINT;
 375       if (Flags & RDW_ERASE)
 376          Window->Flags |= WINDOWOBJECT_NEED_ERASEBKGND;
 377
 378       Flags |= RDW_FRAME;
 379    }
 380
 381    if (Flags & RDW_VALIDATE && RgnType != NULLREGION)
 382    {
 383       if (Window->UpdateRegion != NULL)
 384       {
 385          if (NtGdiCombineRgn(Window->UpdateRegion, Window->UpdateRegion,
 386                              hRgn, RGN_DIFF) == NULLREGION)
 387          {
 388             GDIOBJ_SetOwnership(Window->UpdateRegion, PsGetCurrentProcess());
 389             NtGdiDeleteObject(Window->UpdateRegion);
 390             Window->UpdateRegion = NULL;
 391          }
 392       }
 393
 394       if (Window->UpdateRegion == NULL)
 395          Window->Flags &= ~WINDOWOBJECT_NEED_ERASEBKGND;
 396       if (Flags & RDW_NOFRAME)
 397          Window->Flags &= ~WINDOWOBJECT_NEED_NCPAINT;
 398       if (Flags & RDW_NOERASE)
 399          Window->Flags &= ~WINDOWOBJECT_NEED_ERASEBKGND;
 400    }
 401
 402    if (Flags & RDW_INTERNALPAINT)
 403    {
 404       Window->Flags |= WINDOWOBJECT_NEED_INTERNALPAINT;
 405    }
 406
 407    if (Flags & RDW_NOINTERNALPAINT)
 408    {
 409       Window->Flags &= ~WINDOWOBJECT_NEED_INTERNALPAINT;
 410    }
 411
 412    /*
 413     * Process children if needed
 414     */
 415
 416    if (!(Flags & RDW_NOCHILDREN) && !(Window->Style & WS_MINIMIZE) &&
 417          ((Flags & RDW_ALLCHILDREN) || !(Window->Style & WS_CLIPCHILDREN)))
 418    {
 419       PWINDOW_OBJECT Child;
 420
 421       for (Child = Window->FirstChild; Child; Child = Child->NextSibling)
 422       {
 423          if (Child->Style & WS_VISIBLE)
 424          {
 425             /*
 426              * Recursive call to update children UpdateRegion
 427              */
 428             HRGN hRgnTemp = NtGdiCreateRectRgn(0, 0, 0, 0);
 429             NtGdiCombineRgn(hRgnTemp, hRgn, 0, RGN_COPY);
 430             IntInvalidateWindows(Child, hRgnTemp, Flags);
 431             NtGdiDeleteObject(hRgnTemp);
 432          }
 433
 434       }
 435    }
 436
 437    /*
 438     * Fake post paint messages to window message queue if needed
 439     */
 440
 441    HasPaintMessage = Window->UpdateRegion != NULL ||
 442                      Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT;
 443    HasNCPaintMessage = Window->Flags & WINDOWOBJECT_NEED_NCPAINT;
 444
 445    if (HasPaintMessage != HadPaintMessage)
 446    {
 447       if (HadPaintMessage)
 448          MsqDecPaintCountQueue(Window->MessageQueue);
 449       else
 450          MsqIncPaintCountQueue(Window->MessageQueue);
 451    }
 452
 453    if (HasNCPaintMessage != HadNCPaintMessage)
 454    {
 455       if (HadNCPaintMessage)
 456          MsqDecPaintCountQueue(Window->MessageQueue);
 457       else
 458          MsqIncPaintCountQueue(Window->MessageQueue);
 459    }
 460
 461 }
 462
 463 /*
 464  * IntIsWindowDrawable
 465  *
 466  * Remarks
 467  *    Window is drawable when it is visible and all parents are not
 468  *    minimized.
 469  */
 470
 471 BOOL FASTCALL
 472 IntIsWindowDrawable(PWINDOW_OBJECT Window)
 473 {
 474    PWINDOW_OBJECT Wnd;
 475
 476    for (Wnd = Window; Wnd != NULL; Wnd = Wnd->Parent)
 477    {
 478       if (!(Wnd->Style & WS_VISIBLE) ||
 479             ((Wnd->Style & WS_MINIMIZE) && (Wnd != Window)))
 480       {
 481          return FALSE;
 482       }
 483    }
 484
 485    return TRUE;
 486 }
 487
 488 /*
 489  * IntRedrawWindow
 490  *
 491  * Internal version of NtUserRedrawWindow that takes WINDOW_OBJECT as
 492  * first parameter.
 493  */
 494
 495 BOOL FASTCALL
 496 co_UserRedrawWindow(PWINDOW_OBJECT Window, const RECT* UpdateRect, HRGN UpdateRgn,
 497                     ULONG Flags)
 498 {
 499    HRGN hRgn = NULL;
 500
 501    /*
 502     * Step 1.
 503     * Validation of passed parameters.
 504     */
 505
 506    if (!IntIsWindowDrawable(Window) ||
 507          (Flags & (RDW_VALIDATE | RDW_INVALIDATE)) ==
 508          (RDW_VALIDATE | RDW_INVALIDATE))
 509    {
 510       return FALSE;
 511    }
 512
 513    /*
 514     * Step 2.
 515     * Transform the parameters UpdateRgn and UpdateRect into
 516     * a region hRgn specified in screen coordinates.
 517     */
 518
 519    if (Flags & (RDW_INVALIDATE | RDW_VALIDATE))
 520    {
 521       if (UpdateRgn != NULL)
 522       {
 523          hRgn = NtGdiCreateRectRgn(0, 0, 0, 0);
 524          if (NtGdiCombineRgn(hRgn, UpdateRgn, NULL, RGN_COPY) == NULLREGION)
 525             NtGdiDeleteObject(hRgn);
 526          else
 527             NtGdiOffsetRgn(hRgn, Window->ClientRect.left, Window->ClientRect.top);
 528       }
 529       else if (UpdateRect != NULL)
 530       {
 531          if (!IntGdiIsEmptyRect(UpdateRect))
 532          {
 533             hRgn = UnsafeIntCreateRectRgnIndirect((RECT *)UpdateRect);
 534             NtGdiOffsetRgn(hRgn, Window->ClientRect.left, Window->ClientRect.top);
 535          }
 536       }
 537       else if ((Flags & (RDW_INVALIDATE | RDW_FRAME)) == (RDW_INVALIDATE | RDW_FRAME) ||
 538                (Flags & (RDW_VALIDATE | RDW_NOFRAME)) == (RDW_VALIDATE | RDW_NOFRAME))
 539       {
 540          if (!IntGdiIsEmptyRect(&Window->WindowRect))
 541             hRgn = UnsafeIntCreateRectRgnIndirect(&Window->WindowRect);
 542       }
 543       else
 544       {
 545          if (!IntGdiIsEmptyRect(&Window->ClientRect))
 546             hRgn = UnsafeIntCreateRectRgnIndirect(&Window->ClientRect);
 547       }
 548    }
 549
 550    /*
 551     * Step 3.
 552     * Adjust the window update region depending on hRgn and flags.
 553     */
 554
 555    if (Flags & (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT) &&
 556        hRgn != NULL)
 557    {
 558       IntInvalidateWindows(Window, hRgn, Flags);
 559    }
 560
 561    /*
 562     * Step 4.
 563     * Repaint and erase windows if needed.
 564     */
 565
 566    if (Flags & (RDW_ERASENOW | RDW_UPDATENOW))
 567    {
 568       co_IntPaintWindows(Window, Flags);
 569    }
 570
 571    /*
 572     * Step 5.
 573     * Cleanup ;-)
 574     */
 575
 576    if (hRgn != NULL)
 577    {
 578       NtGdiDeleteObject(hRgn);
 579    }
 580
 581    return TRUE;
 582 }
 583
 584 BOOL FASTCALL
 585 IntIsWindowDirty(PWINDOW_OBJECT Window)
 586 {
 587    return (Window->Style & WS_VISIBLE) &&
 588           ((Window->UpdateRegion != NULL) ||
 589            (Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT) ||
 590            (Window->Flags & WINDOWOBJECT_NEED_NCPAINT));
 591 }
 592
 593 HWND FASTCALL
 594 IntFindWindowToRepaint(PWINDOW_OBJECT Window, PW32THREAD Thread)
 595 {
 596    HWND hChild;
 597    PWINDOW_OBJECT TempWindow;
 598
 599    for (; Window != NULL; Window = Window->NextSibling)
 600    {
 601       if (IntWndBelongsToThread(Window, Thread) &&
 602           IntIsWindowDirty(Window))
 603       {
 604          /* Make sure all non-transparent siblings are already drawn. */
 605          if (Window->ExStyle & WS_EX_TRANSPARENT)
 606          {
 607             for (TempWindow = Window->NextSibling; TempWindow != NULL;
 608                  TempWindow = TempWindow->NextSibling)
 609             {
 610                if (!(TempWindow->ExStyle & WS_EX_TRANSPARENT) &&
 611                    IntWndBelongsToThread(TempWindow, Thread) &&
 612                    IntIsWindowDirty(TempWindow))
 613                {
 614                   return TempWindow->hSelf;
 615                }
 616             }
 617          }
 618
 619          return Window->hSelf;
 620       }
 621
 622       if (Window->FirstChild)
 623       {
 624          hChild = IntFindWindowToRepaint(Window->FirstChild, Thread);
 625          if (hChild != NULL)
 626             return hChild;
 627       }
 628    }
 629
 630    return NULL;
 631 }
 632
 633 BOOL FASTCALL
 634 IntGetPaintMessage(HWND hWnd, UINT MsgFilterMin, UINT MsgFilterMax,
 635                    PW32THREAD Thread, MSG *Message, BOOL Remove)
 636 {
 637    PUSER_MESSAGE_QUEUE MessageQueue = (PUSER_MESSAGE_QUEUE)Thread->MessageQueue;
 638
 639    if (!MessageQueue->PaintCount)
 640       return FALSE;
 641
 642    if ((MsgFilterMin != 0 || MsgFilterMax != 0) &&
 643          (MsgFilterMin > WM_PAINT || MsgFilterMax < WM_PAINT))
 644       return FALSE;
 645
 646    Message->hwnd = IntFindWindowToRepaint(UserGetDesktopWindow(), PsGetWin32Thread());
 647
 648    if (Message->hwnd == NULL)
 649    {
 650       DPRINT1("PAINTING BUG: Thread marked as containing dirty windows, but no dirty windows found!\n");
 651       return FALSE;
 652    }
 653
 654    if (hWnd != NULL && Message->hwnd != hWnd)
 655       return FALSE;
 656
 657    Message->message = WM_PAINT;
 658    Message->wParam = Message->lParam = 0;
 659
 660    return TRUE;
 661 }
 662
 663 static
 664 HWND FASTCALL
 665 co_IntFixCaret(PWINDOW_OBJECT Window, LPRECT lprc, UINT flags)
 666 {
 667    PDESKTOP_OBJECT Desktop;
 668    PTHRDCARETINFO CaretInfo;
 669    HWND hWndCaret;
 670    PWINDOW_OBJECT WndCaret;
 671
 672    ASSERT_REFS_CO(Window);
 673
 674    Desktop = ((PW32THREAD)PsGetCurrentThread()->Tcb.Win32Thread)->Desktop;
 675    CaretInfo = ((PUSER_MESSAGE_QUEUE)Desktop->ActiveMessageQueue)->CaretInfo;
 676    hWndCaret = CaretInfo->hWnd;
 677
 678    WndCaret = UserGetWindowObject(hWndCaret);
 679
 680    //fix: check for WndCaret can be null
 681    if (WndCaret == Window ||
 682          ((flags & SW_SCROLLCHILDREN) && IntIsChildWindow(Window, WndCaret)))
 683    {
 684       POINT pt, FromOffset, ToOffset, Offset;
 685       RECT rcCaret;
 686
 687       pt.x = CaretInfo->Pos.x;
 688       pt.y = CaretInfo->Pos.y;
 689       IntGetClientOrigin(WndCaret, &FromOffset);
 690       IntGetClientOrigin(Window, &ToOffset);
 691       Offset.x = FromOffset.x - ToOffset.x;
 692       Offset.y = FromOffset.y - ToOffset.y;
 693       rcCaret.left = pt.x;
 694       rcCaret.top = pt.y;
 695       rcCaret.right = pt.x + CaretInfo->Size.cx;
 696       rcCaret.bottom = pt.y + CaretInfo->Size.cy;
 697       if (IntGdiIntersectRect(lprc, lprc, &rcCaret))
 698       {
 699          co_UserHideCaret(0);
 700          lprc->left = pt.x;
 701          lprc->top = pt.y;
 702          return hWndCaret;
 703       }
 704    }
 705
 706    return 0;
 707 }
 708
 709 /* PUBLIC FUNCTIONS ***********************************************************/
 710
 711 /*
 712  * NtUserBeginPaint
 713  *
 714  * Status
 715  *    @implemented
 716  */
 717
 718 HDC STDCALL
 719 NtUserBeginPaint(HWND hWnd, PAINTSTRUCT* UnsafePs)
 720 {
 721    PWINDOW_OBJECT Window = NULL;
 722    PAINTSTRUCT Ps;
 723    PROSRGNDATA Rgn;
 724    NTSTATUS Status;
 725    DECLARE_RETURN(HDC);
 726    USER_REFERENCE_ENTRY Ref;
 727
 728    DPRINT("Enter NtUserBeginPaint\n");
 729    UserEnterExclusive();
 730
 731    if (!(Window = UserGetWindowObject(hWnd)))
 732    {
 733       RETURN( NULL);
 734    }
 735
 736    UserRefObjectCo(Window, &Ref);
 737
 738    co_UserHideCaret(Window);
 739
 740    if (Window->Flags & WINDOWOBJECT_NEED_NCPAINT)
 741    {
 742       HRGN hRgn;
 743
 744       hRgn = IntGetNCUpdateRgn(Window, FALSE);
 745       Window->Flags &= ~WINDOWOBJECT_NEED_NCPAINT;
 746       MsqDecPaintCountQueue(Window->MessageQueue);
 747       co_IntSendMessage(hWnd, WM_NCPAINT, (WPARAM)hRgn, 0);
 748       if (hRgn != (HANDLE)1 && hRgn != NULL)
 749       {
 750          /* NOTE: The region can already by deleted! */
 751          GDIOBJ_FreeObj(hRgn, GDI_OBJECT_TYPE_REGION | GDI_OBJECT_TYPE_SILENT);
 752       }
 753    }
 754
 755    RtlZeroMemory(&Ps, sizeof(PAINTSTRUCT));
 756
 757    Ps.hdc = UserGetDCEx(Window, Window->UpdateRegion, DCX_INTERSECTRGN | DCX_USESTYLE);
 758    if (!Ps.hdc)
 759    {
 760       RETURN(NULL);
 761    }
 762
 763    if (Window->UpdateRegion != NULL)
 764    {
 765       MsqDecPaintCountQueue(Window->MessageQueue);
 766       Rgn = RGNDATA_LockRgn(Window->UpdateRegion);
 767       if (NULL != Rgn)
 768       {
 769          UnsafeIntGetRgnBox(Rgn, &Ps.rcPaint);
 770          RGNDATA_UnlockRgn(Rgn);
 771          IntGdiIntersectRect(&Ps.rcPaint, &Ps.rcPaint, &Window->ClientRect);
 772          IntGdiOffsetRect(&Ps.rcPaint,
 773                           -Window->ClientRect.left,
 774                           -Window->ClientRect.top);
 775       }
 776       else
 777       {
 778          IntGetClientRect(Window, &Ps.rcPaint);
 779       }
 780       GDIOBJ_SetOwnership(Window->UpdateRegion, PsGetCurrentProcess());
 781       Window->UpdateRegion = NULL;
 782    }
 783    else
 784    {
 785       if (Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT)
 786          MsqDecPaintCountQueue(Window->MessageQueue);
 787
 788       IntGetClientRect(Window, &Ps.rcPaint);
 789    }
 790
 791    Window->Flags &= ~WINDOWOBJECT_NEED_INTERNALPAINT;
 792
 793    if (Window->Flags & WINDOWOBJECT_NEED_ERASEBKGND)
 794    {
 795       Window->Flags &= ~WINDOWOBJECT_NEED_ERASEBKGND;
 796       Ps.fErase = !co_IntSendMessage(hWnd, WM_ERASEBKGND, (WPARAM)Ps.hdc, 0);
 797    }
 798    else
 799    {
 800       Ps.fErase = FALSE;
 801    }
 802
 803    Status = MmCopyToCaller(UnsafePs, &Ps, sizeof(PAINTSTRUCT));
 804    if (! NT_SUCCESS(Status))
 805    {
 806       SetLastNtError(Status);
 807       RETURN(NULL);
 808    }
 809
 810    RETURN(Ps.hdc);
 811
 812 CLEANUP:
 813    if (Window) UserDerefObjectCo(Window);
 814
 815    DPRINT("Leave NtUserBeginPaint, ret=%i\n",_ret_);
 816    UserLeave();
 817    END_CLEANUP;
 818
 819 }
 820
 821 /*
 822  * NtUserEndPaint
 823  *
 824  * Status
 825  *    @implemented
 826  */
 827
 828 BOOL STDCALL
 829 NtUserEndPaint(HWND hWnd, CONST PAINTSTRUCT* lPs)
 830 {
 831    PWINDOW_OBJECT Window;
 832    DECLARE_RETURN(BOOL);
 833    USER_REFERENCE_ENTRY Ref;
 834
 835    DPRINT("Enter NtUserEndPaint\n");
 836    UserEnterExclusive();
 837
 838    if (!(Window = UserGetWindowObject(hWnd)))
 839    {
 840       RETURN(FALSE);
 841    }
 842
 843    UserReleaseDC(Window, lPs->hdc, TRUE);
 844
 845    UserRefObjectCo(Window, &Ref);
 846    co_UserShowCaret(Window);
 847    UserDerefObjectCo(Window);
 848
 849    RETURN(TRUE);
 850
 851 CLEANUP:
 852    DPRINT("Leave NtUserEndPaint, ret=%i\n",_ret_);
 853    UserLeave();
 854    END_CLEANUP;
 855 }
 856
 857
 858 INT FASTCALL
 859 co_UserGetUpdateRgn(PWINDOW_OBJECT Window, HRGN hRgn, BOOL bErase)
 860 {
 861    int RegionType;
 862    RECT Rect;
 863
 864    ASSERT_REFS_CO(Window);
 865
 866    if (Window->UpdateRegion == NULL)
 867    {
 868       RegionType = (NtGdiSetRectRgn(hRgn, 0, 0, 0, 0) ? NULLREGION : ERROR);
 869    }
 870    else
 871    {
 872       Rect = Window->ClientRect;
 873       IntIntersectWithParents(Window, &Rect);
 874       NtGdiSetRectRgn(hRgn, Rect.left, Rect.top, Rect.right, Rect.bottom);
 875       RegionType = NtGdiCombineRgn(hRgn, hRgn, Window->UpdateRegion, RGN_AND);
 876       NtGdiOffsetRgn(hRgn, -Window->ClientRect.left, -Window->ClientRect.top);
 877    }
 878
 879    if (bErase && RegionType != NULLREGION && RegionType != ERROR)
 880    {
 881       co_UserRedrawWindow(Window, NULL, NULL, RDW_ERASENOW | RDW_NOCHILDREN);
 882    }
 883
 884    return RegionType;
 885 }
 886
 887 /*
 888  * NtUserGetUpdateRgn
 889  *
 890  * Status
 891  *    @implemented
 892  */
 893
 894 INT STDCALL
 895 NtUserGetUpdateRgn(HWND hWnd, HRGN hRgn, BOOL bErase)
 896 {
 897    DECLARE_RETURN(INT);
 898    PWINDOW_OBJECT Window;
 899    INT ret;
 900    USER_REFERENCE_ENTRY Ref;
 901
 902    DPRINT("Enter NtUserGetUpdateRgn\n");
 903    UserEnterExclusive();
 904
 905    if (!(Window = UserGetWindowObject(hWnd)))
 906    {
 907       RETURN(ERROR);
 908    }
 909
 910    UserRefObjectCo(Window, &Ref);
 911    ret = co_UserGetUpdateRgn(Window, hRgn, bErase);
 912    UserDerefObjectCo(Window);
 913
 914    RETURN(ret);
 915
 916 CLEANUP:
 917    DPRINT("Leave NtUserGetUpdateRgn, ret=%i\n",_ret_);
 918    UserLeave();
 919    END_CLEANUP;
 920 }
 921
 922 /*
 923  * NtUserGetUpdateRect
 924  *
 925  * Status
 926  *    @implemented
 927  */
 928
 929 BOOL STDCALL
 930 NtUserGetUpdateRect(HWND hWnd, LPRECT UnsafeRect, BOOL bErase)
 931 {
 932    PWINDOW_OBJECT Window;
 933    RECT Rect;
 934    INT RegionType;
 935    PROSRGNDATA RgnData;
 936    NTSTATUS Status;
 937    DECLARE_RETURN(BOOL);
 938
 939    DPRINT("Enter NtUserGetUpdateRect\n");
 940    UserEnterExclusive();
 941
 942    if (!(Window = UserGetWindowObject(hWnd)))
 943    {
 944       RETURN(FALSE);
 945    }
 946
 947    if (Window->UpdateRegion == NULL)
 948    {
 949       Rect.left = Rect.top = Rect.right = Rect.bottom = 0;
 950    }
 951    else
 952    {
 953       /* Get the update region bounding box. */
 954       if (Window->UpdateRegion == (HRGN)1)
 955       {
 956          Rect = Window->ClientRect;
 957       }
 958       else
 959       {
 960          RgnData = RGNDATA_LockRgn(Window->UpdateRegion);
 961          ASSERT(RgnData != NULL);
 962          RegionType = UnsafeIntGetRgnBox(RgnData, &Rect);
 963          RGNDATA_UnlockRgn(RgnData);
 964
 965          if (RegionType != ERROR && RegionType != NULLREGION)
 966             IntGdiIntersectRect(&Rect, &Rect, &Window->ClientRect);
 967       }
 968
 969       if (IntIntersectWithParents(Window, &Rect))
 970       {
 971          IntGdiOffsetRect(&Rect,
 972                           -Window->ClientRect.left,
 973                           -Window->ClientRect.top);
 974       } else
 975       {
 976          Rect.left = Rect.top = Rect.right = Rect.bottom = 0;
 977       }
 978    }
 979
 980    if (bErase && !IntGdiIsEmptyRect(&Rect))
 981    {
 982       USER_REFERENCE_ENTRY Ref;
 983       UserRefObjectCo(Window, &Ref);
 984       co_UserRedrawWindow(Window, NULL, NULL, RDW_ERASENOW | RDW_NOCHILDREN);
 985       UserDerefObjectCo(Window);
 986    }
 987
 988    if (UnsafeRect != NULL)
 989    {
 990       Status = MmCopyToCaller(UnsafeRect, &Rect, sizeof(RECT));
 991       if (!NT_SUCCESS(Status))
 992       {
 993          SetLastWin32Error(ERROR_INVALID_PARAMETER);
 994          RETURN(FALSE);
 995       }
 996    }
 997
 998    RETURN(!IntGdiIsEmptyRect(&Rect));
 999
1000 CLEANUP:
1001    DPRINT("Leave NtUserGetUpdateRect, ret=%i\n",_ret_);
1002    UserLeave();
1003    END_CLEANUP;
1004 }
1005
1006 /*
1007  * NtUserRedrawWindow
1008  *
1009  * Status
1010  *    @implemented
1011  */
1012
1013 BOOL STDCALL
1014 NtUserRedrawWindow(HWND hWnd, CONST RECT *lprcUpdate, HRGN hrgnUpdate,
1015                    UINT flags)
1016 {
1017    RECT SafeUpdateRect;
1018    NTSTATUS Status;
1019    PWINDOW_OBJECT Wnd;
1020    DECLARE_RETURN(BOOL);
1021    USER_REFERENCE_ENTRY Ref;
1022
1023    DPRINT("Enter NtUserRedrawWindow\n");
1024    UserEnterExclusive();
1025
1026    if (!(Wnd = UserGetWindowObject(hWnd ? hWnd : IntGetDesktopWindow())))
1027    {
1028       RETURN( FALSE);
1029    }
1030
1031    if (lprcUpdate != NULL)
1032    {
1033       Status = MmCopyFromCaller(&SafeUpdateRect, (PRECT)lprcUpdate,
1034                                 sizeof(RECT));
1035
1036       if (!NT_SUCCESS(Status))
1037       {
1038          SetLastWin32Error(ERROR_INVALID_PARAMETER);
1039          RETURN( FALSE);
1040       }
1041    }
1042
1043    UserRefObjectCo(Wnd, &Ref);
1044
1045    Status = co_UserRedrawWindow(Wnd, NULL == lprcUpdate ? NULL : &SafeUpdateRect,
1046                                 hrgnUpdate, flags);
1047
1048    UserDerefObjectCo(Wnd);
1049
1050    if (!NT_SUCCESS(Status))
1051    {
1052       /* IntRedrawWindow fails only in case that flags are invalid */
1053       SetLastWin32Error(ERROR_INVALID_PARAMETER);
1054       RETURN( FALSE);
1055    }
1056
1057    RETURN( TRUE);
1058
1059 CLEANUP:
1060    DPRINT("Leave NtUserRedrawWindow, ret=%i\n",_ret_);
1061    UserLeave();
1062    END_CLEANUP;
1063 }
1064
1065
1066
1067 static
1068 DWORD FASTCALL
1069 UserScrollDC(HDC hDC, INT dx, INT dy, const RECT *lprcScroll,
1070              const RECT *lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate)
1071 {
1072    RECT rSrc, rClipped_src, rClip, rDst, offset;
1073    PDC DC;
1074
1075    /*
1076     * Compute device clipping region (in device coordinates).
1077     */
1078
1079    DC = DC_LockDc(hDC);
1080    if (NULL == DC)
1081    {
1082       return FALSE;
1083    }
1084    if (lprcScroll)
1085       rSrc = *lprcScroll;
1086    else
1087       IntGdiGetClipBox(hDC, &rSrc);
1088    IntLPtoDP(DC, (LPPOINT)&rSrc, 2);
1089
1090    if (lprcClip)
1091       rClip = *lprcClip;
1092    else
1093       IntGdiGetClipBox(hDC, &rClip);
1094    IntLPtoDP(DC, (LPPOINT)&rClip, 2);
1095
1096    IntGdiIntersectRect(&rClipped_src, &rSrc, &rClip);
1097
1098    rDst = rClipped_src;
1099    IntGdiSetRect(&offset, 0, 0, dx, dy);
1100    IntLPtoDP(DC, (LPPOINT)&offset, 2);
1101    IntGdiOffsetRect(&rDst, offset.right - offset.left,  offset.bottom - offset.top);
1102    IntGdiIntersectRect(&rDst, &rDst, &rClip);
1103
1104    /*
1105     * Copy bits, if possible.
1106     */
1107
1108    if (rDst.bottom > rDst.top && rDst.right > rDst.left)
1109    {
1110       RECT rDst_lp = rDst, rSrc_lp = rDst;
1111
1112       IntGdiOffsetRect(&rSrc_lp, offset.left - offset.right, offset.top - offset.bottom);
1113       IntDPtoLP(DC, (LPPOINT)&rDst_lp, 2);
1114       IntDPtoLP(DC, (LPPOINT)&rSrc_lp, 2);
1115       DC_UnlockDc(DC);
1116
1117       if (!NtGdiBitBlt(hDC, rDst_lp.left, rDst_lp.top, rDst_lp.right - rDst_lp.left,
1118                        rDst_lp.bottom - rDst_lp.top, hDC, rSrc_lp.left, rSrc_lp.top,
1119                        SRCCOPY))
1120          return FALSE;
1121    }
1122    else
1123    {
1124       DC_UnlockDc(DC);
1125    }
1126
1127    /*
1128     * Compute update areas.  This is the clipped source or'ed with the
1129     * unclipped source translated minus the clipped src translated (rDst)
1130     * all clipped to rClip.
1131     */
1132
1133    if (hrgnUpdate || lprcUpdate)
1134    {
1135       HRGN hRgn = hrgnUpdate, hRgn2;
1136
1137       if (hRgn)
1138          NtGdiSetRectRgn(hRgn, rClipped_src.left, rClipped_src.top, rClipped_src.right, rClipped_src.bottom);
1139       else
1140          hRgn = NtGdiCreateRectRgn(rClipped_src.left, rClipped_src.top, rClipped_src.right, rClipped_src.bottom);
1141
1142       hRgn2 = UnsafeIntCreateRectRgnIndirect(&rSrc);
1143       NtGdiOffsetRgn(hRgn2, offset.right - offset.left,  offset.bottom - offset.top);
1144       NtGdiCombineRgn(hRgn, hRgn, hRgn2, RGN_OR);
1145
1146       NtGdiSetRectRgn(hRgn2, rDst.left, rDst.top, rDst.right, rDst.bottom);
1147       NtGdiCombineRgn(hRgn, hRgn, hRgn2, RGN_DIFF);
1148
1149       NtGdiSetRectRgn(hRgn2, rClip.left, rClip.top, rClip.right, rClip.bottom);
1150       NtGdiCombineRgn(hRgn, hRgn, hRgn2, RGN_AND);
1151
1152       if (lprcUpdate)
1153       {
1154          NtGdiGetRgnBox(hRgn, lprcUpdate);
1155
1156          /* Put the lprcUpdate in logical coordinate */
1157          NtGdiDPtoLP(hDC, (LPPOINT)lprcUpdate, 2);
1158       }
1159       if (!hrgnUpdate)
1160          NtGdiDeleteObject(hRgn);
1161       NtGdiDeleteObject(hRgn2);
1162    }
1163    return TRUE;
1164 }
1165
1166
1167
1168
1169 /*
1170  * NtUserScrollDC
1171  *
1172  * Status
1173  *    @implemented
1174  */
1175
1176 DWORD STDCALL
1177 NtUserScrollDC(HDC hDC, INT dx, INT dy, const RECT *lprcScroll,
1178                const RECT *lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate)
1179 {
1180    DECLARE_RETURN(DWORD);
1181
1182    DPRINT("Enter NtUserScrollDC\n");
1183    UserEnterExclusive();
1184
1185    RETURN( UserScrollDC(hDC, dx, dy, lprcScroll, lprcClip, hrgnUpdate, lprcUpdate));
1186
1187 CLEANUP:
1188    DPRINT("Leave NtUserScrollDC, ret=%i\n",_ret_);
1189    UserLeave();
1190    END_CLEANUP;
1191
1192 }
1193
1194 /*
1195  * NtUserScrollWindowEx
1196  *
1197  * Status
1198  *    @implemented
1199  */
1200
1201 DWORD STDCALL
1202 NtUserScrollWindowEx(HWND hWnd, INT dx, INT dy, const RECT *UnsafeRect,
1203                      const RECT *UnsafeClipRect, HRGN hrgnUpdate, LPRECT rcUpdate, UINT flags)
1204 {
1205    RECT rc, cliprc, caretrc, rect, clipRect;
1206    INT Result;
1207    PWINDOW_OBJECT Window = NULL, CaretWnd;
1208    HDC hDC;
1209    HRGN hrgnTemp;
1210    HWND hwndCaret;
1211    BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE));
1212    BOOL bOwnRgn = TRUE;
1213    NTSTATUS Status;
1214    DECLARE_RETURN(DWORD);
1215    USER_REFERENCE_ENTRY Ref, CaretRef;
1216
1217    DPRINT("Enter NtUserScrollWindowEx\n");
1218    UserEnterExclusive();
1219
1220    Window = UserGetWindowObject(hWnd);
1221    if (!Window || !IntIsWindowDrawable(Window))
1222    {
1223       Window = NULL; /* prevent deref at cleanup */
1224       RETURN( ERROR);
1225    }
1226    UserRefObjectCo(Window, &Ref);
1227
1228    IntGetClientRect(Window, &rc);
1229
1230    if (NULL != UnsafeRect)
1231    {
1232       Status = MmCopyFromCaller(&rect, UnsafeRect, sizeof(RECT));
1233       if (! NT_SUCCESS(Status))
1234       {
1235          SetLastNtError(Status);
1236          RETURN( ERROR);
1237       }
1238       IntGdiIntersectRect(&rc, &rc, &rect);
1239    }
1240
1241    if (NULL != UnsafeClipRect)
1242    {
1243       Status = MmCopyFromCaller(&clipRect, UnsafeClipRect, sizeof(RECT));
1244       if (! NT_SUCCESS(Status))
1245       {
1246          SetLastNtError(Status);
1247          RETURN( ERROR);
1248       }
1249       IntGdiIntersectRect(&cliprc, &rc, &clipRect);
1250    }
1251    else
1252       cliprc = rc;
1253
1254    if (cliprc.right <= cliprc.left || cliprc.bottom <= cliprc.top ||
1255          (dx == 0 && dy == 0))
1256    {
1257       RETURN( NULLREGION);
1258    }
1259
1260    caretrc = rc;
1261    hwndCaret = co_IntFixCaret(Window, &caretrc, flags);
1262
1263    if (hrgnUpdate)
1264       bOwnRgn = FALSE;
1265    else if (bUpdate)
1266       hrgnUpdate = NtGdiCreateRectRgn(0, 0, 0, 0);
1267
1268    hDC = UserGetDCEx(Window, 0, DCX_CACHE | DCX_USESTYLE);
1269    if (hDC)
1270    {
1271       UserScrollDC(hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate);
1272       UserReleaseDC(Window, hDC, FALSE);
1273    }
1274
1275    /*
1276     * Take into account the fact that some damage may have occurred during
1277     * the scroll.
1278     */
1279
1280    hrgnTemp = NtGdiCreateRectRgn(0, 0, 0, 0);
1281    Result = co_UserGetUpdateRgn(Window, hrgnTemp, FALSE);
1282    if (Result != NULLREGION)
1283    {
1284       HRGN hrgnClip = UnsafeIntCreateRectRgnIndirect(&cliprc);
1285       NtGdiOffsetRgn(hrgnTemp, dx, dy);
1286       NtGdiCombineRgn(hrgnTemp, hrgnTemp, hrgnClip, RGN_AND);
1287       co_UserRedrawWindow(Window, NULL, hrgnTemp, RDW_INVALIDATE | RDW_ERASE);
1288       NtGdiDeleteObject(hrgnClip);
1289    }
1290
1291    NtGdiDeleteObject(hrgnTemp);
1292
1293    if (flags & SW_SCROLLCHILDREN)
1294    {
1295       HWND *List = IntWinListChildren(Window);
1296       if (List)
1297       {
1298          int i;
1299          RECT r, dummy;
1300          POINT ClientOrigin;
1301          PWINDOW_OBJECT Wnd;
1302          USER_REFERENCE_ENTRY WndRef;
1303
1304          IntGetClientOrigin(Window, &ClientOrigin);
1305          for (i = 0; List[i]; i++)
1306          {
1307             if (!(Wnd = UserGetWindowObject(List[i])))
1308                continue;
1309
1310             r = Wnd->WindowRect;
1311             r.left -= ClientOrigin.x;
1312             r.top -= ClientOrigin.y;
1313             r.right -= ClientOrigin.x;
1314             r.bottom -= ClientOrigin.y;
1315
1316             if (! UnsafeRect || IntGdiIntersectRect(&dummy, &r, &rc))
1317             {
1318                UserRefObjectCo(Wnd, &WndRef);
1319                co_WinPosSetWindowPos(Wnd, 0, r.left + dx, r.top + dy, 0, 0,
1320                                      SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE |
1321                                      SWP_NOREDRAW);
1322                UserDerefObjectCo(Wnd);
1323             }
1324
1325          }
1326          ExFreePool(List);
1327       }
1328    }
1329
1330    if (flags & (SW_INVALIDATE | SW_ERASE))
1331       co_UserRedrawWindow(Window, NULL, hrgnUpdate, RDW_INVALIDATE | RDW_ERASE |
1332                           ((flags & SW_ERASE) ? RDW_ERASENOW : 0) |
1333                           ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0));
1334
1335    if (bOwnRgn && hrgnUpdate)
1336       NtGdiDeleteObject(hrgnUpdate);
1337
1338    if ((CaretWnd = UserGetWindowObject(hwndCaret)))
1339    {
1340       UserRefObjectCo(CaretWnd, &CaretRef);
1341
1342       co_IntSetCaretPos(caretrc.left + dx, caretrc.top + dy);
1343       co_UserShowCaret(CaretWnd);
1344
1345       UserDerefObjectCo(CaretWnd);
1346    }
1347
1348    RETURN(Result);
1349
1350 CLEANUP:
1351    if (Window)
1352       UserDerefObjectCo(Window);
1353
1354    DPRINT("Leave NtUserScrollWindowEx, ret=%i\n",_ret_);
1355    UserLeave();
1356    END_CLEANUP;
1357 }
1358
1359 /* EOF */