windows/winpos.c

   1 /*
   2  * Window position related functions.
   3  *
   4  * Copyright 1993, 1994, 1995 Alexandre Julliard
   5  *                       1995, 1996, 1999 Alex Korobka
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include "winerror.h"
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "winerror.h"
  32 #include "wine/winuser16.h"
  33 #include "wine/server.h"
  34 #include "controls.h"
  35 #include "user.h"
  36 #include "win.h"
  37 #include "message.h"
  38 #include "winpos.h"
  39 #include "nonclient.h"
  40 #include "wine/debug.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(win);
  43
  44 #define HAS_DLGFRAME(style,exStyle) \
  45     (((exStyle) & WS_EX_DLGMODALFRAME) || \
  46      (((style) & WS_DLGFRAME) && !((style) & WS_BORDER)))
  47
  48 #define HAS_THICKFRAME(style) \
  49     (((style) & WS_THICKFRAME) && \
  50      !(((style) & (WS_DLGFRAME|WS_BORDER)) == WS_DLGFRAME))
  51
  52 #define EMPTYPOINT(pt)          ((*(LONG*)&(pt)) == -1)
  53
  54 #define PLACE_MIN               0x0001
  55 #define PLACE_MAX               0x0002
  56 #define PLACE_RECT              0x0004
  57
  58
  59 #define DWP_MAGIC  ((INT)('W' | ('P' << 8) | ('O' << 16) | ('S' << 24)))
  60
  61 typedef struct
  62 {
  63     INT       actualCount;
  64     INT       suggestedCount;
  65     BOOL      valid;
  66     INT       wMagic;
  67     HWND      hwndParent;
  68     WINDOWPOS winPos[1];
  69 } DWP;
  70
  71 /* ----- internal variables ----- */
  72
  73 static LPCSTR atomInternalPos;
  74
  75
  76 /***********************************************************************
  77  *           WINPOS_CreateInternalPosAtom
  78  */
  79 BOOL WINPOS_CreateInternalPosAtom()
  80 {
  81     LPCSTR str = "SysIP";
  82     atomInternalPos = (LPCSTR)(DWORD)GlobalAddAtomA(str);
  83     return (atomInternalPos) ? TRUE : FALSE;
  84 }
  85
  86 /***********************************************************************
  87  *           WINPOS_CheckInternalPos
  88  *
  89  * Called when a window is destroyed.
  90  */
  91 void WINPOS_CheckInternalPos( HWND hwnd )
  92 {
  93     LPINTERNALPOS lpPos = (LPINTERNALPOS) GetPropA( hwnd, atomInternalPos );
  94
  95     if( lpPos )
  96     {
  97         if( IsWindow(lpPos->hwndIconTitle) )
  98             DestroyWindow( lpPos->hwndIconTitle );
  99         HeapFree( GetProcessHeap(), 0, lpPos );
 100     }
 101 }
 102
 103 /***********************************************************************
 104  *              ArrangeIconicWindows (USER32.@)
 105  */
 106 UINT WINAPI ArrangeIconicWindows( HWND parent )
 107 {
 108     RECT rectParent;
 109     HWND hwndChild;
 110     INT x, y, xspacing, yspacing;
 111
 112     GetClientRect( parent, &rectParent );
 113     x = rectParent.left;
 114     y = rectParent.bottom;
 115     xspacing = GetSystemMetrics(SM_CXICONSPACING);
 116     yspacing = GetSystemMetrics(SM_CYICONSPACING);
 117
 118     hwndChild = GetWindow( parent, GW_CHILD );
 119     while (hwndChild)
 120     {
 121         if( IsIconic( hwndChild ) )
 122         {
 123             WINPOS_ShowIconTitle( hwndChild, FALSE );
 124
 125             SetWindowPos( hwndChild, 0, x + (xspacing - GetSystemMetrics(SM_CXICON)) / 2,
 126                             y - yspacing - GetSystemMetrics(SM_CYICON)/2, 0, 0,
 127                             SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 128             if( IsWindow(hwndChild) )
 129                 WINPOS_ShowIconTitle(hwndChild , TRUE );
 130
 131             if (x <= rectParent.right - xspacing) x += xspacing;
 132             else
 133             {
 134                 x = rectParent.left;
 135                 y -= yspacing;
 136             }
 137         }
 138         hwndChild = GetWindow( hwndChild, GW_HWNDNEXT );
 139     }
 140     return yspacing;
 141 }
 142
 143
 144 /***********************************************************************
 145  *              SwitchToThisWindow (USER32.@)
 146  */
 147 void WINAPI SwitchToThisWindow( HWND hwnd, BOOL restore )
 148 {
 149     ShowWindow( hwnd, restore ? SW_RESTORE : SW_SHOWMINIMIZED );
 150 }
 151
 152
 153 /***********************************************************************
 154  *              GetWindowRect (USER32.@)
 155  */
 156 BOOL WINAPI GetWindowRect( HWND hwnd, LPRECT rect )
 157 {
 158     BOOL ret = WIN_GetRectangles( hwnd, rect, NULL );
 159     if (ret)
 160     {
 161         MapWindowPoints( GetAncestor( hwnd, GA_PARENT ), 0, (POINT *)rect, 2 );
 162         TRACE( "hwnd %p (%ld,%ld)-(%ld,%ld)\n",
 163                hwnd, rect->left, rect->top, rect->right, rect->bottom);
 164     }
 165     return ret;
 166 }
 167
 168
 169 /***********************************************************************
 170  *              GetWindowRgn (USER32.@)
 171  */
 172 int WINAPI GetWindowRgn ( HWND hwnd, HRGN hrgn )
 173 {
 174     int nRet = ERROR;
 175     HRGN win_rgn = 0;
 176     RGNDATA *data;
 177     size_t size = 256;
 178     BOOL retry = FALSE;
 179
 180     do
 181     {
 182         if (!(data = HeapAlloc( GetProcessHeap(), 0, sizeof(*data) + size - 1 )))
 183         {
 184             SetLastError( ERROR_OUTOFMEMORY );
 185             return ERROR;
 186         }
 187         SERVER_START_REQ( get_window_region )
 188         {
 189             req->window = hwnd;
 190             wine_server_set_reply( req, data->Buffer, size );
 191             if (!wine_server_call_err( req ))
 192             {
 193                 if (!reply->total_size) retry = FALSE;  /* no region at all */
 194                 else if (reply->total_size <= size)
 195                 {
 196                     size_t reply_size = wine_server_reply_size( reply );
 197                     data->rdh.dwSize   = sizeof(data->rdh);
 198                     data->rdh.iType    = RDH_RECTANGLES;
 199                     data->rdh.nCount   = reply_size / sizeof(RECT);
 200                     data->rdh.nRgnSize = reply_size;
 201                     win_rgn = ExtCreateRegion( NULL, size, data );
 202                     retry = FALSE;
 203                 }
 204                 else
 205                 {
 206                     size = reply->total_size;
 207                     retry = TRUE;
 208                 }
 209             }
 210         }
 211         SERVER_END_REQ;
 212         HeapFree( GetProcessHeap(), 0, data );
 213     } while (retry);
 214
 215     if (win_rgn)
 216     {
 217         nRet = CombineRgn( hrgn, win_rgn, 0, RGN_COPY );
 218         DeleteObject( win_rgn );
 219     }
 220     return nRet;
 221 }
 222
 223
 224 /***********************************************************************
 225  *              SetWindowRgn (USER32.@)
 226  */
 227 int WINAPI SetWindowRgn( HWND hwnd, HRGN hrgn, BOOL bRedraw )
 228 {
 229     static const RECT empty_rect;
 230     BOOL ret;
 231
 232     if (hrgn)
 233     {
 234         RGNDATA *data;
 235         DWORD size;
 236
 237         if (!(size = GetRegionData( hrgn, 0, NULL ))) return FALSE;
 238         if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE;
 239         if (!GetRegionData( hrgn, size, data ))
 240         {
 241             HeapFree( GetProcessHeap(), 0, data );
 242             return FALSE;
 243         }
 244         SERVER_START_REQ( set_window_region )
 245         {
 246             req->window = hwnd;
 247             if (data->rdh.nCount)
 248                 wine_server_add_data( req, data->Buffer, data->rdh.nCount * sizeof(RECT) );
 249             else
 250                 wine_server_add_data( req, &empty_rect, sizeof(empty_rect) );
 251             ret = !wine_server_call_err( req );
 252         }
 253         SERVER_END_REQ;
 254     }
 255     else  /* clear existing region */
 256     {
 257         SERVER_START_REQ( set_window_region )
 258         {
 259             req->window = hwnd;
 260             ret = !wine_server_call_err( req );
 261         }
 262         SERVER_END_REQ;
 263     }
 264
 265     if (ret && USER_Driver.pSetWindowRgn)
 266         ret = USER_Driver.pSetWindowRgn( hwnd, hrgn, bRedraw );
 267
 268     if (ret && bRedraw) RedrawWindow( hwnd, NULL, 0, RDW_FRAME | RDW_INVALIDATE | RDW_ERASE );
 269     return ret;
 270 }
 271
 272
 273 /***********************************************************************
 274  *              GetClientRect (USER32.@)
 275  */
 276 BOOL WINAPI GetClientRect( HWND hwnd, LPRECT rect )
 277 {
 278     BOOL ret;
 279
 280     rect->right = rect->bottom = 0;
 281     if ((ret = WIN_GetRectangles( hwnd, NULL, rect )))
 282     {
 283         rect->right -= rect->left;
 284         rect->bottom -= rect->top;
 285     }
 286     rect->left = rect->top = 0;
 287     return ret;
 288 }
 289
 290
 291 /*******************************************************************
 292  *              ClientToScreen (USER32.@)
 293  */
 294 BOOL WINAPI ClientToScreen( HWND hwnd, LPPOINT lppnt )
 295 {
 296     MapWindowPoints( hwnd, 0, lppnt, 1 );
 297     return TRUE;
 298 }
 299
 300
 301 /*******************************************************************
 302  *              ScreenToClient (USER32.@)
 303  */
 304 BOOL WINAPI ScreenToClient( HWND hwnd, LPPOINT lppnt )
 305 {
 306     MapWindowPoints( 0, hwnd, lppnt, 1 );
 307     return TRUE;
 308 }
 309
 310
 311 /***********************************************************************
 312  *           list_children_from_point
 313  *
 314  * Get the list of children that can contain point from the server.
 315  * Point is in screen coordinates.
 316  * Returned list must be freed by caller.
 317  */
 318 static HWND *list_children_from_point( HWND hwnd, POINT pt )
 319 {
 320     HWND *list;
 321     int size = 32;
 322
 323     for (;;)
 324     {
 325         int count = 0;
 326
 327         if (!(list = HeapAlloc( GetProcessHeap(), 0, size * sizeof(HWND) ))) break;
 328
 329         SERVER_START_REQ( get_window_children_from_point )
 330         {
 331             req->parent = hwnd;
 332             req->x = pt.x;
 333             req->y = pt.y;
 334             wine_server_set_reply( req, list, (size-1) * sizeof(HWND) );
 335             if (!wine_server_call( req )) count = reply->count;
 336         }
 337         SERVER_END_REQ;
 338         if (count && count < size)
 339         {
 340             list[count] = 0;
 341             return list;
 342         }
 343         HeapFree( GetProcessHeap(), 0, list );
 344         if (!count) break;
 345         size = count + 1;  /* restart with a large enough buffer */
 346     }
 347     return NULL;
 348 }
 349
 350
 351 /***********************************************************************
 352  *           WINPOS_WindowFromPoint
 353  *
 354  * Find the window and hittest for a given point.
 355  */
 356 HWND WINPOS_WindowFromPoint( HWND hwndScope, POINT pt, INT *hittest )
 357 {
 358     int i, res;
 359     HWND ret, *list;
 360
 361     if (!hwndScope) hwndScope = GetDesktopWindow();
 362
 363     *hittest = HTNOWHERE;
 364
 365     if (!(list = list_children_from_point( hwndScope, pt ))) return 0;
 366
 367     /* now determine the hittest */
 368
 369     for (i = 0; list[i]; i++)
 370     {
 371         LONG style = GetWindowLongW( list[i], GWL_STYLE );
 372
 373         /* If window is minimized or disabled, return at once */
 374         if (style & WS_MINIMIZE)
 375         {
 376             *hittest = HTCAPTION;
 377             break;
 378         }
 379         if (style & WS_DISABLED)
 380         {
 381             *hittest = HTERROR;
 382             break;
 383         }
 384         /* Send WM_NCCHITTEST (if same thread) */
 385         if (!WIN_IsCurrentThread( list[i] ))
 386         {
 387             *hittest = HTCLIENT;
 388             break;
 389         }
 390         res = SendMessageA( list[i], WM_NCHITTEST, 0, MAKELONG(pt.x,pt.y) );
 391         if (res != HTTRANSPARENT)
 392         {
 393             *hittest = res;  /* Found the window */
 394             break;
 395         }
 396         /* continue search with next window in z-order */
 397     }
 398     ret = list[i];
 399     HeapFree( GetProcessHeap(), 0, list );
 400     TRACE( "scope %p (%ld,%ld) returning %p\n", hwndScope, pt.x, pt.y, ret );
 401     return ret;
 402 }
 403
 404
 405 /*******************************************************************
 406  *              WindowFromPoint (USER32.@)
 407  */
 408 HWND WINAPI WindowFromPoint( POINT pt )
 409 {
 410     INT hittest;
 411     return WINPOS_WindowFromPoint( 0, pt, &hittest );
 412 }
 413
 414
 415 /*******************************************************************
 416  *              ChildWindowFromPoint (USER32.@)
 417  */
 418 HWND WINAPI ChildWindowFromPoint( HWND hwndParent, POINT pt )
 419 {
 420     return ChildWindowFromPointEx( hwndParent, pt, CWP_ALL );
 421 }
 422
 423 /*******************************************************************
 424  *              ChildWindowFromPointEx (USER32.@)
 425  */
 426 HWND WINAPI ChildWindowFromPointEx( HWND hwndParent, POINT pt, UINT uFlags)
 427 {
 428     /* pt is in the client coordinates */
 429     HWND *list;
 430     int i;
 431     RECT rect;
 432     HWND retvalue;
 433
 434     GetClientRect( hwndParent, &rect );
 435     if (!PtInRect( &rect, pt )) return 0;
 436     if (!(list = WIN_ListChildren( hwndParent ))) return 0;
 437
 438     for (i = 0; list[i]; i++)
 439     {
 440         if (!WIN_GetRectangles( list[i], &rect, NULL )) continue;
 441         if (!PtInRect( &rect, pt )) continue;
 442         if (uFlags & (CWP_SKIPINVISIBLE|CWP_SKIPDISABLED))
 443         {
 444             LONG style = GetWindowLongW( list[i], GWL_STYLE );
 445             if ((uFlags & CWP_SKIPINVISIBLE) && !(style & WS_VISIBLE)) continue;
 446             if ((uFlags & CWP_SKIPDISABLED) && (style & WS_DISABLED)) continue;
 447         }
 448         if (uFlags & CWP_SKIPTRANSPARENT)
 449         {
 450             if (GetWindowLongW( list[i], GWL_EXSTYLE ) & WS_EX_TRANSPARENT) continue;
 451         }
 452         break;
 453     }
 454     retvalue = list[i];
 455     HeapFree( GetProcessHeap(), 0, list );
 456     if (!retvalue) retvalue = hwndParent;
 457     return retvalue;
 458 }
 459
 460
 461 /*******************************************************************
 462  *         WINPOS_GetWinOffset
 463  *
 464  * Calculate the offset between the origin of the two windows. Used
 465  * to implement MapWindowPoints.
 466  */
 467 static void WINPOS_GetWinOffset( HWND hwndFrom, HWND hwndTo, POINT *offset )
 468 {
 469     WND * wndPtr;
 470
 471     offset->x = offset->y = 0;
 472
 473     /* Translate source window origin to screen coords */
 474     if (hwndFrom)
 475     {
 476         HWND hwnd = hwndFrom;
 477
 478         while (hwnd)
 479         {
 480             if (hwnd == hwndTo) return;
 481             if (!(wndPtr = WIN_GetPtr( hwnd )))
 482             {
 483                 ERR( "bad hwndFrom = %p\n", hwnd );
 484                 return;
 485             }
 486             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 487             offset->x += wndPtr->rectClient.left;
 488             offset->y += wndPtr->rectClient.top;
 489             hwnd = wndPtr->parent;
 490             WIN_ReleasePtr( wndPtr );
 491         }
 492     }
 493
 494     /* Translate origin to destination window coords */
 495     if (hwndTo)
 496     {
 497         HWND hwnd = hwndTo;
 498
 499         while (hwnd)
 500         {
 501             if (!(wndPtr = WIN_GetPtr( hwnd )))
 502             {
 503                 ERR( "bad hwndTo = %p\n", hwnd );
 504                 return;
 505             }
 506             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 507             offset->x -= wndPtr->rectClient.left;
 508             offset->y -= wndPtr->rectClient.top;
 509             hwnd = wndPtr->parent;
 510             WIN_ReleasePtr( wndPtr );
 511         }
 512     }
 513     return;
 514
 515  other_process:  /* one of the parents may belong to another process, do it the hard way */
 516     offset->x = offset->y = 0;
 517     SERVER_START_REQ( get_windows_offset )
 518     {
 519         req->from = hwndFrom;
 520         req->to   = hwndTo;
 521         if (!wine_server_call( req ))
 522         {
 523             offset->x = reply->x;
 524             offset->y = reply->y;
 525         }
 526     }
 527     SERVER_END_REQ;
 528 }
 529
 530
 531 /*******************************************************************
 532  *              MapWindowPoints (USER.258)
 533  */
 534 void WINAPI MapWindowPoints16( HWND16 hwndFrom, HWND16 hwndTo,
 535                                LPPOINT16 lppt, UINT16 count )
 536 {
 537     POINT offset;
 538
 539     WINPOS_GetWinOffset( WIN_Handle32(hwndFrom), WIN_Handle32(hwndTo), &offset );
 540     while (count--)
 541     {
 542         lppt->x += offset.x;
 543         lppt->y += offset.y;
 544         lppt++;
 545     }
 546 }
 547
 548
 549 /*******************************************************************
 550  *              MapWindowPoints (USER32.@)
 551  */
 552 INT WINAPI MapWindowPoints( HWND hwndFrom, HWND hwndTo, LPPOINT lppt, UINT count )
 553 {
 554     POINT offset;
 555
 556     WINPOS_GetWinOffset( hwndFrom, hwndTo, &offset );
 557     while (count--)
 558     {
 559         lppt->x += offset.x;
 560         lppt->y += offset.y;
 561         lppt++;
 562     }
 563     return MAKELONG( LOWORD(offset.x), LOWORD(offset.y) );
 564 }
 565
 566
 567 /***********************************************************************
 568  *              IsIconic (USER32.@)
 569  */
 570 BOOL WINAPI IsIconic(HWND hWnd)
 571 {
 572     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MINIMIZE) != 0;
 573 }
 574
 575
 576 /***********************************************************************
 577  *              IsZoomed (USER32.@)
 578  */
 579 BOOL WINAPI IsZoomed(HWND hWnd)
 580 {
 581     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MAXIMIZE) != 0;
 582 }
 583
 584
 585 /*******************************************************************
 586  *              AllowSetForegroundWindow (USER32.@)
 587  */
 588 BOOL WINAPI AllowSetForegroundWindow( DWORD procid )
 589 {
 590     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 591      * implemented, then fix this function. */
 592     return TRUE;
 593 }
 594
 595
 596 /*******************************************************************
 597  *              LockSetForegroundWindow (USER32.@)
 598  */
 599 BOOL WINAPI LockSetForegroundWindow( UINT lockcode )
 600 {
 601     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 602      * implemented, then fix this function. */
 603     return TRUE;
 604 }
 605
 606
 607 /***********************************************************************
 608  *              BringWindowToTop (USER32.@)
 609  */
 610 BOOL WINAPI BringWindowToTop( HWND hwnd )
 611 {
 612     return SetWindowPos( hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE );
 613 }
 614
 615
 616 /***********************************************************************
 617  *              MoveWindow (USER32.@)
 618  */
 619 BOOL WINAPI MoveWindow( HWND hwnd, INT x, INT y, INT cx, INT cy,
 620                             BOOL repaint )
 621 {
 622     int flags = SWP_NOZORDER | SWP_NOACTIVATE;
 623     if (!repaint) flags |= SWP_NOREDRAW;
 624     TRACE("%p %d,%d %dx%d %d\n", hwnd, x, y, cx, cy, repaint );
 625     return SetWindowPos( hwnd, 0, x, y, cx, cy, flags );
 626 }
 627
 628 /***********************************************************************
 629  *           WINPOS_InitInternalPos
 630  */
 631 static LPINTERNALPOS WINPOS_InitInternalPos( WND* wnd, POINT pt, const RECT *restoreRect )
 632 {
 633     LPINTERNALPOS lpPos = (LPINTERNALPOS) GetPropA( wnd->hwndSelf,
 634                                                       atomInternalPos );
 635     if( !lpPos )
 636     {
 637         /* this happens when the window is minimized/maximized
 638          * for the first time (rectWindow is not adjusted yet) */
 639
 640         lpPos = HeapAlloc( GetProcessHeap(), 0, sizeof(INTERNALPOS) );
 641         if( !lpPos ) return NULL;
 642
 643         SetPropA( wnd->hwndSelf, atomInternalPos, (HANDLE)lpPos );
 644         lpPos->hwndIconTitle = 0; /* defer until needs to be shown */
 645         lpPos->rectNormal.left   = wnd->rectWindow.left;
 646         lpPos->rectNormal.top    = wnd->rectWindow.top;
 647         lpPos->rectNormal.right  = wnd->rectWindow.right;
 648         lpPos->rectNormal.bottom = wnd->rectWindow.bottom;
 649         lpPos->ptIconPos.x = lpPos->ptIconPos.y = -1;
 650         lpPos->ptMaxPos.x = lpPos->ptMaxPos.y = -1;
 651     }
 652
 653     if( wnd->dwStyle & WS_MINIMIZE )
 654     {
 655         lpPos->ptIconPos.x = pt.x;
 656         lpPos->ptIconPos.y = pt.y;
 657     }
 658     else if( wnd->dwStyle & WS_MAXIMIZE )
 659     {
 660         lpPos->ptMaxPos.x = pt.x;
 661         lpPos->ptMaxPos.y = pt.y;
 662     }
 663     else if( restoreRect )
 664     {
 665         lpPos->rectNormal.left   = restoreRect->left;
 666         lpPos->rectNormal.top    = restoreRect->top;
 667         lpPos->rectNormal.right  = restoreRect->right;
 668         lpPos->rectNormal.bottom = restoreRect->bottom;
 669     }
 670     return lpPos;
 671 }
 672
 673 /***********************************************************************
 674  *           WINPOS_RedrawIconTitle
 675  */
 676 BOOL WINPOS_RedrawIconTitle( HWND hWnd )
 677 {
 678     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hWnd, atomInternalPos );
 679     if( lpPos )
 680     {
 681         if( lpPos->hwndIconTitle )
 682         {
 683             SendMessageA( lpPos->hwndIconTitle, WM_SHOWWINDOW, TRUE, 0);
 684             InvalidateRect( lpPos->hwndIconTitle, NULL, TRUE );
 685             return TRUE;
 686         }
 687     }
 688     return FALSE;
 689 }
 690
 691 /***********************************************************************
 692  *           WINPOS_ShowIconTitle
 693  */
 694 BOOL WINPOS_ShowIconTitle( HWND hwnd, BOOL bShow )
 695 {
 696     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 697
 698     if( lpPos && !(GetWindowLongA( hwnd, GWL_EXSTYLE) & WS_EX_MANAGED))
 699     {
 700         HWND title = lpPos->hwndIconTitle;
 701
 702         TRACE("%p %i\n", hwnd, (bShow != 0) );
 703
 704         if( !title )
 705             lpPos->hwndIconTitle = title = ICONTITLE_Create( hwnd );
 706         if( bShow )
 707         {
 708             if (!IsWindowVisible(title))
 709             {
 710                 SendMessageA( title, WM_SHOWWINDOW, TRUE, 0 );
 711                 SetWindowPos( title, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE |
 712                               SWP_NOACTIVATE | SWP_NOZORDER | SWP_SHOWWINDOW );
 713             }
 714         }
 715         else ShowWindow( title, SW_HIDE );
 716     }
 717     return FALSE;
 718 }
 719
 720 /*******************************************************************
 721  *           WINPOS_GetMinMaxInfo
 722  *
 723  * Get the minimized and maximized information for a window.
 724  */
 725 void WINPOS_GetMinMaxInfo( HWND hwnd, POINT *maxSize, POINT *maxPos,
 726                            POINT *minTrack, POINT *maxTrack )
 727 {
 728     LPINTERNALPOS lpPos;
 729     MINMAXINFO MinMax;
 730     INT xinc, yinc;
 731     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 732     LONG exstyle = GetWindowLongA( hwnd, GWL_EXSTYLE );
 733     RECT rc;
 734
 735     /* Compute default values */
 736
 737     GetWindowRect(hwnd, &rc);
 738     MinMax.ptReserved.x = rc.left;
 739     MinMax.ptReserved.y = rc.top;
 740
 741     if (style & WS_CHILD)
 742     {
 743         if ((style & WS_CAPTION) == WS_CAPTION)
 744             style &= ~WS_BORDER; /* WS_CAPTION = WS_DLGFRAME | WS_BORDER */
 745
 746         GetClientRect(GetParent(hwnd), &rc);
 747         AdjustWindowRectEx(&rc, style, 0, exstyle);
 748
 749         /* avoid calculating this twice */
 750         style &= ~(WS_DLGFRAME | WS_BORDER | WS_THICKFRAME);
 751
 752         MinMax.ptMaxSize.x = rc.right - rc.left;
 753         MinMax.ptMaxSize.y = rc.bottom - rc.top;
 754     }
 755     else
 756     {
 757         MinMax.ptMaxSize.x = GetSystemMetrics(SM_CXSCREEN);
 758         MinMax.ptMaxSize.y = GetSystemMetrics(SM_CYSCREEN);
 759     }
 760     MinMax.ptMinTrackSize.x = GetSystemMetrics(SM_CXMINTRACK);
 761     MinMax.ptMinTrackSize.y = GetSystemMetrics(SM_CYMINTRACK);
 762     MinMax.ptMaxTrackSize.x = GetSystemMetrics(SM_CXSCREEN);
 763     MinMax.ptMaxTrackSize.y = GetSystemMetrics(SM_CYSCREEN);
 764
 765     if (HAS_DLGFRAME( style, exstyle ))
 766     {
 767         xinc = GetSystemMetrics(SM_CXDLGFRAME);
 768         yinc = GetSystemMetrics(SM_CYDLGFRAME);
 769     }
 770     else
 771     {
 772         xinc = yinc = 0;
 773         if (HAS_THICKFRAME(style))
 774         {
 775             xinc += GetSystemMetrics(SM_CXFRAME);
 776             yinc += GetSystemMetrics(SM_CYFRAME);
 777         }
 778         if (style & WS_BORDER)
 779         {
 780             xinc += GetSystemMetrics(SM_CXBORDER);
 781             yinc += GetSystemMetrics(SM_CYBORDER);
 782         }
 783     }
 784     MinMax.ptMaxSize.x += 2 * xinc;
 785     MinMax.ptMaxSize.y += 2 * yinc;
 786
 787     lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 788     if( lpPos && !EMPTYPOINT(lpPos->ptMaxPos) )
 789     {
 790         MinMax.ptMaxPosition.x = lpPos->ptMaxPos.x;
 791         MinMax.ptMaxPosition.y = lpPos->ptMaxPos.y;
 792     }
 793     else
 794     {
 795         MinMax.ptMaxPosition.x = -xinc;
 796         MinMax.ptMaxPosition.y = -yinc;
 797     }
 798
 799     SendMessageA( hwnd, WM_GETMINMAXINFO, 0, (LPARAM)&MinMax );
 800
 801       /* Some sanity checks */
 802
 803     TRACE("%ld %ld / %ld %ld / %ld %ld / %ld %ld\n",
 804                       MinMax.ptMaxSize.x, MinMax.ptMaxSize.y,
 805                       MinMax.ptMaxPosition.x, MinMax.ptMaxPosition.y,
 806                       MinMax.ptMaxTrackSize.x, MinMax.ptMaxTrackSize.y,
 807                       MinMax.ptMinTrackSize.x, MinMax.ptMinTrackSize.y);
 808     MinMax.ptMaxTrackSize.x = max( MinMax.ptMaxTrackSize.x,
 809                                    MinMax.ptMinTrackSize.x );
 810     MinMax.ptMaxTrackSize.y = max( MinMax.ptMaxTrackSize.y,
 811                                    MinMax.ptMinTrackSize.y );
 812
 813     if (maxSize) *maxSize = MinMax.ptMaxSize;
 814     if (maxPos) *maxPos = MinMax.ptMaxPosition;
 815     if (minTrack) *minTrack = MinMax.ptMinTrackSize;
 816     if (maxTrack) *maxTrack = MinMax.ptMaxTrackSize;
 817 }
 818
 819 /***********************************************************************
 820  *              ShowWindowAsync (USER32.@)
 821  *
 822  * doesn't wait; returns immediately.
 823  * used by threads to toggle windows in other (possibly hanging) threads
 824  */
 825 BOOL WINAPI ShowWindowAsync( HWND hwnd, INT cmd )
 826 {
 827     HWND full_handle;
 828
 829     if (is_broadcast(hwnd))
 830     {
 831         SetLastError( ERROR_INVALID_PARAMETER );
 832         return FALSE;
 833     }
 834
 835     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 836         return USER_Driver.pShowWindow( full_handle, cmd );
 837     return SendNotifyMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 838 }
 839
 840
 841 /***********************************************************************
 842  *              ShowWindow (USER32.@)
 843  */
 844 BOOL WINAPI ShowWindow( HWND hwnd, INT cmd )
 845 {
 846     HWND full_handle;
 847
 848     if (is_broadcast(hwnd))
 849     {
 850         SetLastError( ERROR_INVALID_PARAMETER );
 851         return FALSE;
 852     }
 853     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 854     {
 855         if (USER_Driver.pShowWindow)
 856             return USER_Driver.pShowWindow( full_handle, cmd );
 857         return FALSE;
 858     }
 859     return SendMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 860 }
 861
 862
 863 /***********************************************************************
 864  *              GetInternalWindowPos (USER32.@)
 865  */
 866 UINT WINAPI GetInternalWindowPos( HWND hwnd, LPRECT rectWnd,
 867                                       LPPOINT ptIcon )
 868 {
 869     WINDOWPLACEMENT wndpl;
 870     if (GetWindowPlacement( hwnd, &wndpl ))
 871     {
 872         if (rectWnd) *rectWnd = wndpl.rcNormalPosition;
 873         if (ptIcon)  *ptIcon = wndpl.ptMinPosition;
 874         return wndpl.showCmd;
 875     }
 876     return 0;
 877 }
 878
 879
 880 /***********************************************************************
 881  *              GetWindowPlacement (USER32.@)
 882  *
 883  * Win95:
 884  * Fails if wndpl->length of Win95 (!) apps is invalid.
 885  */
 886 BOOL WINAPI GetWindowPlacement( HWND hwnd, WINDOWPLACEMENT *wndpl )
 887 {
 888     WND *pWnd = WIN_FindWndPtr( hwnd );
 889     LPINTERNALPOS lpPos;
 890
 891     if(!pWnd ) return FALSE;
 892
 893     lpPos = WINPOS_InitInternalPos( pWnd, *(LPPOINT)&pWnd->rectWindow.left, &pWnd->rectWindow );
 894     wndpl->length  = sizeof(*wndpl);
 895     if( pWnd->dwStyle & WS_MINIMIZE )
 896         wndpl->showCmd = SW_SHOWMINIMIZED;
 897     else
 898         wndpl->showCmd = ( pWnd->dwStyle & WS_MAXIMIZE ) ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL ;
 899     if( pWnd->flags & WIN_RESTORE_MAX )
 900         wndpl->flags = WPF_RESTORETOMAXIMIZED;
 901     else
 902         wndpl->flags = 0;
 903     wndpl->ptMinPosition.x = lpPos->ptIconPos.x;
 904     wndpl->ptMinPosition.y = lpPos->ptIconPos.y;
 905     wndpl->ptMaxPosition.x = lpPos->ptMaxPos.x;
 906     wndpl->ptMaxPosition.y = lpPos->ptMaxPos.y;
 907     wndpl->rcNormalPosition.left   = lpPos->rectNormal.left;
 908     wndpl->rcNormalPosition.top    = lpPos->rectNormal.top;
 909     wndpl->rcNormalPosition.right  = lpPos->rectNormal.right;
 910     wndpl->rcNormalPosition.bottom = lpPos->rectNormal.bottom;
 911     WIN_ReleaseWndPtr(pWnd);
 912     return TRUE;
 913 }
 914
 915
 916 /***********************************************************************
 917  *           WINPOS_SetPlacement
 918  */
 919 static BOOL WINPOS_SetPlacement( HWND hwnd, const WINDOWPLACEMENT *wndpl, UINT flags )
 920 {
 921     WND *pWnd = WIN_FindWndPtr( hwnd );
 922     if( pWnd )
 923     {
 924         LPINTERNALPOS lpPos = (LPINTERNALPOS)WINPOS_InitInternalPos( pWnd,
 925                              *(LPPOINT)&pWnd->rectWindow.left, &pWnd->rectWindow );
 926
 927         if( flags & PLACE_MIN )
 928         {
 929             lpPos->ptIconPos.x = wndpl->ptMinPosition.x;
 930             lpPos->ptIconPos.y = wndpl->ptMinPosition.y;
 931         }
 932         if( flags & PLACE_MAX )
 933         {
 934             lpPos->ptMaxPos.x = wndpl->ptMaxPosition.x;
 935             lpPos->ptMaxPos.y = wndpl->ptMaxPosition.y;
 936         }
 937         if( flags & PLACE_RECT)
 938         {
 939             lpPos->rectNormal.left   = wndpl->rcNormalPosition.left;
 940             lpPos->rectNormal.top    = wndpl->rcNormalPosition.top;
 941             lpPos->rectNormal.right  = wndpl->rcNormalPosition.right;
 942             lpPos->rectNormal.bottom = wndpl->rcNormalPosition.bottom;
 943         }
 944         if( pWnd->dwStyle & WS_MINIMIZE )
 945         {
 946             WINPOS_ShowIconTitle( pWnd->hwndSelf, FALSE );
 947             if( wndpl->flags & WPF_SETMINPOSITION && !EMPTYPOINT(lpPos->ptIconPos))
 948                 SetWindowPos( hwnd, 0, lpPos->ptIconPos.x, lpPos->ptIconPos.y,
 949                                 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 950         }
 951         else if( pWnd->dwStyle & WS_MAXIMIZE )
 952         {
 953             if( !EMPTYPOINT(lpPos->ptMaxPos) )
 954                 SetWindowPos( hwnd, 0, lpPos->ptMaxPos.x, lpPos->ptMaxPos.y,
 955                                 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 956         }
 957         else if( flags & PLACE_RECT )
 958                 SetWindowPos( hwnd, 0, lpPos->rectNormal.left, lpPos->rectNormal.top,
 959                                 lpPos->rectNormal.right - lpPos->rectNormal.left,
 960                                 lpPos->rectNormal.bottom - lpPos->rectNormal.top,
 961                                 SWP_NOZORDER | SWP_NOACTIVATE );
 962
 963         ShowWindow( hwnd, wndpl->showCmd );
 964         if( IsWindow(hwnd) && pWnd->dwStyle & WS_MINIMIZE )
 965         {
 966             if( pWnd->dwStyle & WS_VISIBLE ) WINPOS_ShowIconTitle( pWnd->hwndSelf, TRUE );
 967
 968             /* SDK: ...valid only the next time... */
 969             if( wndpl->flags & WPF_RESTORETOMAXIMIZED ) pWnd->flags |= WIN_RESTORE_MAX;
 970         }
 971         WIN_ReleaseWndPtr(pWnd);
 972         return TRUE;
 973     }
 974     return FALSE;
 975 }
 976
 977
 978 /***********************************************************************
 979  *              SetWindowPlacement (USER32.@)
 980  *
 981  * Win95:
 982  * Fails if wndpl->length of Win95 (!) apps is invalid.
 983  */
 984 BOOL WINAPI SetWindowPlacement( HWND hwnd, const WINDOWPLACEMENT *wpl )
 985 {
 986     if (!wpl) return FALSE;
 987     return WINPOS_SetPlacement( hwnd, wpl, PLACE_MIN | PLACE_MAX | PLACE_RECT );
 988 }
 989
 990
 991 /***********************************************************************
 992  *              AnimateWindow (USER32.@)
 993  *              Shows/Hides a window with an animation
 994  *              NO ANIMATION YET
 995  */
 996 BOOL WINAPI AnimateWindow(HWND hwnd, DWORD dwTime, DWORD dwFlags)
 997 {
 998         FIXME("partial stub\n");
 999
1000         /* If trying to show/hide and it's already   *
1001          * shown/hidden or invalid window, fail with *
1002          * invalid parameter                         */
1003         if(!IsWindow(hwnd) ||
1004            (IsWindowVisible(hwnd) && !(dwFlags & AW_HIDE)) ||
1005            (!IsWindowVisible(hwnd) && (dwFlags & AW_HIDE)))
1006         {
1007                 SetLastError(ERROR_INVALID_PARAMETER);
1008                 return FALSE;
1009         }
1010
1011         ShowWindow(hwnd, (dwFlags & AW_HIDE) ? SW_HIDE : ((dwFlags & AW_ACTIVATE) ? SW_SHOW : SW_SHOWNA));
1012
1013         return TRUE;
1014 }
1015
1016 /***********************************************************************
1017  *              SetInternalWindowPos (USER32.@)
1018  */
1019 void WINAPI SetInternalWindowPos( HWND hwnd, UINT showCmd,
1020                                     LPRECT rect, LPPOINT pt )
1021 {
1022     if( IsWindow(hwnd) )
1023     {
1024         WINDOWPLACEMENT wndpl;
1025         UINT flags;
1026
1027         wndpl.length  = sizeof(wndpl);
1028         wndpl.showCmd = showCmd;
1029         wndpl.flags = flags = 0;
1030
1031         if( pt )
1032         {
1033             flags |= PLACE_MIN;
1034             wndpl.flags |= WPF_SETMINPOSITION;
1035             wndpl.ptMinPosition = *pt;
1036         }
1037         if( rect )
1038         {
1039             flags |= PLACE_RECT;
1040             wndpl.rcNormalPosition = *rect;
1041         }
1042         WINPOS_SetPlacement( hwnd, &wndpl, flags );
1043     }
1044 }
1045
1046
1047 /*******************************************************************
1048  *         can_activate_window
1049  *
1050  * Check if we can activate the specified window.
1051  */
1052 static BOOL can_activate_window( HWND hwnd )
1053 {
1054     LONG style;
1055
1056     if (!hwnd) return FALSE;
1057     style = GetWindowLongW( hwnd, GWL_STYLE );
1058     if (!(style & WS_VISIBLE)) return FALSE;
1059     if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return FALSE;
1060     return !(style & WS_DISABLED);
1061 }
1062
1063
1064 /*******************************************************************
1065  *         WINPOS_ActivateOtherWindow
1066  *
1067  *  Activates window other than pWnd.
1068  */
1069 void WINPOS_ActivateOtherWindow(HWND hwnd)
1070 {
1071     HWND hwndTo, fg;
1072
1073     if ((GetWindowLongW( hwnd, GWL_STYLE ) & WS_POPUP) && (hwndTo = GetWindow( hwnd, GW_OWNER )))
1074     {
1075         hwndTo = GetAncestor( hwndTo, GA_ROOT );
1076         if (can_activate_window( hwndTo )) goto done;
1077     }
1078
1079     hwndTo = hwnd;
1080     for (;;)
1081     {
1082         if (!(hwndTo = GetWindow( hwndTo, GW_HWNDNEXT ))) break;
1083         if (can_activate_window( hwndTo )) break;
1084     }
1085
1086  done:
1087     fg = GetForegroundWindow();
1088     TRACE("win = %p fg = %p\n", hwndTo, fg);
1089     if (!fg || (hwnd == fg))
1090     {
1091         if (SetForegroundWindow( hwndTo )) return;
1092     }
1093     if (!SetActiveWindow( hwndTo )) SetActiveWindow(0);
1094 }
1095
1096
1097 /***********************************************************************
1098  *           WINPOS_HandleWindowPosChanging16
1099  *
1100  * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
1101  */
1102 LONG WINPOS_HandleWindowPosChanging16( HWND hwnd, WINDOWPOS16 *winpos )
1103 {
1104     POINT minTrack, maxTrack;
1105     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1106
1107     if (winpos->flags & SWP_NOSIZE) return 0;
1108     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
1109     {
1110         WINPOS_GetMinMaxInfo( hwnd, NULL, NULL, &minTrack, &maxTrack );
1111         if (winpos->cx > maxTrack.x) winpos->cx = maxTrack.x;
1112         if (winpos->cy > maxTrack.y) winpos->cy = maxTrack.y;
1113         if (!(style & WS_MINIMIZE))
1114         {
1115             if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
1116             if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
1117         }
1118     }
1119     return 0;
1120 }
1121
1122
1123 /***********************************************************************
1124  *           WINPOS_HandleWindowPosChanging
1125  *
1126  * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
1127  */
1128 LONG WINPOS_HandleWindowPosChanging( HWND hwnd, WINDOWPOS *winpos )
1129 {
1130     POINT minTrack, maxTrack;
1131     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1132
1133     if (winpos->flags & SWP_NOSIZE) return 0;
1134     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
1135     {
1136         WINPOS_GetMinMaxInfo( hwnd, NULL, NULL, &minTrack, &maxTrack );
1137         if (winpos->cx > maxTrack.x) winpos->cx = maxTrack.x;
1138         if (winpos->cy > maxTrack.y) winpos->cy = maxTrack.y;
1139         if (!(style & WS_MINIMIZE))
1140         {
1141             if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
1142             if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
1143         }
1144     }
1145     return 0;
1146 }
1147
1148
1149 /***********************************************************************
1150  *           dump_winpos_flags
1151  */
1152 static void dump_winpos_flags(UINT flags)
1153 {
1154     TRACE("flags:");
1155     if(flags & SWP_NOSIZE) TRACE(" SWP_NOSIZE");
1156     if(flags & SWP_NOMOVE) TRACE(" SWP_NOMOVE");
1157     if(flags & SWP_NOZORDER) TRACE(" SWP_NOZORDER");
1158     if(flags & SWP_NOREDRAW) TRACE(" SWP_NOREDRAW");
1159     if(flags & SWP_NOACTIVATE) TRACE(" SWP_NOACTIVATE");
1160     if(flags & SWP_FRAMECHANGED) TRACE(" SWP_FRAMECHANGED");
1161     if(flags & SWP_SHOWWINDOW) TRACE(" SWP_SHOWWINDOW");
1162     if(flags & SWP_HIDEWINDOW) TRACE(" SWP_HIDEWINDOW");
1163     if(flags & SWP_NOCOPYBITS) TRACE(" SWP_NOCOPYBITS");
1164     if(flags & SWP_NOOWNERZORDER) TRACE(" SWP_NOOWNERZORDER");
1165     if(flags & SWP_NOSENDCHANGING) TRACE(" SWP_NOSENDCHANGING");
1166     if(flags & SWP_DEFERERASE) TRACE(" SWP_DEFERERASE");
1167     if(flags & SWP_ASYNCWINDOWPOS) TRACE(" SWP_ASYNCWINDOWPOS");
1168
1169 #define DUMPED_FLAGS \
1170     (SWP_NOSIZE | \
1171     SWP_NOMOVE | \
1172     SWP_NOZORDER | \
1173     SWP_NOREDRAW | \
1174     SWP_NOACTIVATE | \
1175     SWP_FRAMECHANGED | \
1176     SWP_SHOWWINDOW | \
1177     SWP_HIDEWINDOW | \
1178     SWP_NOCOPYBITS | \
1179     SWP_NOOWNERZORDER | \
1180     SWP_NOSENDCHANGING | \
1181     SWP_DEFERERASE | \
1182     SWP_ASYNCWINDOWPOS)
1183
1184     if(flags & ~DUMPED_FLAGS) TRACE(" %08x", flags & ~DUMPED_FLAGS);
1185     TRACE("\n");
1186 #undef DUMPED_FLAGS
1187 }
1188
1189 /***********************************************************************
1190  *              SetWindowPos (USER32.@)
1191  */
1192 BOOL WINAPI SetWindowPos( HWND hwnd, HWND hwndInsertAfter,
1193                           INT x, INT y, INT cx, INT cy, UINT flags )
1194 {
1195     WINDOWPOS winpos;
1196
1197     TRACE("hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1198           hwnd, hwndInsertAfter, x, y, cx, cy, flags);
1199     if(TRACE_ON(win)) dump_winpos_flags(flags);
1200
1201     if (is_broadcast(hwnd))
1202     {
1203         SetLastError( ERROR_INVALID_PARAMETER );
1204         return FALSE;
1205     }
1206
1207     winpos.hwnd = WIN_GetFullHandle(hwnd);
1208     winpos.hwndInsertAfter = WIN_GetFullHandle(hwndInsertAfter);
1209     winpos.x = x;
1210     winpos.y = y;
1211     winpos.cx = cx;
1212     winpos.cy = cy;
1213     winpos.flags = flags;
1214     if (WIN_IsCurrentThread( hwnd )) return USER_Driver.pSetWindowPos( &winpos );
1215     return SendMessageW( winpos.hwnd, WM_WINE_SETWINDOWPOS, 0, (LPARAM)&winpos );
1216 }
1217
1218
1219 /***********************************************************************
1220  *              BeginDeferWindowPos (USER32.@)
1221  */
1222 HDWP WINAPI BeginDeferWindowPos( INT count )
1223 {
1224     HDWP handle;
1225     DWP *pDWP;
1226
1227     TRACE("%d\n", count);
1228
1229     if (count < 0)
1230     {
1231         SetLastError(ERROR_INVALID_PARAMETER);
1232         return 0;
1233     }
1234     /* Windows allows zero count, in which case it allocates context for 8 moves */
1235     if (count == 0) count = 8;
1236
1237     handle = USER_HEAP_ALLOC( sizeof(DWP) + (count-1)*sizeof(WINDOWPOS) );
1238     if (!handle) return 0;
1239     pDWP = (DWP *) USER_HEAP_LIN_ADDR( handle );
1240     pDWP->actualCount    = 0;
1241     pDWP->suggestedCount = count;
1242     pDWP->valid          = TRUE;
1243     pDWP->wMagic         = DWP_MAGIC;
1244     pDWP->hwndParent     = 0;
1245
1246     TRACE("returning hdwp %p\n", handle);
1247     return handle;
1248 }
1249
1250
1251 /***********************************************************************
1252  *              DeferWindowPos (USER32.@)
1253  */
1254 HDWP WINAPI DeferWindowPos( HDWP hdwp, HWND hwnd, HWND hwndAfter,
1255                                 INT x, INT y, INT cx, INT cy,
1256                                 UINT flags )
1257 {
1258     DWP *pDWP;
1259     int i;
1260     HDWP newhdwp = hdwp,retvalue;
1261
1262     TRACE("hdwp %p, hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1263           hdwp, hwnd, hwndAfter, x, y, cx, cy, flags);
1264
1265     hwnd = WIN_GetFullHandle( hwnd );
1266     if (hwnd == GetDesktopWindow()) return 0;
1267
1268     if (!(pDWP = USER_HEAP_LIN_ADDR( hdwp ))) return 0;
1269
1270     USER_Lock();
1271
1272     for (i = 0; i < pDWP->actualCount; i++)
1273     {
1274         if (pDWP->winPos[i].hwnd == hwnd)
1275         {
1276               /* Merge with the other changes */
1277             if (!(flags & SWP_NOZORDER))
1278             {
1279                 pDWP->winPos[i].hwndInsertAfter = WIN_GetFullHandle(hwndAfter);
1280             }
1281             if (!(flags & SWP_NOMOVE))
1282             {
1283                 pDWP->winPos[i].x = x;
1284                 pDWP->winPos[i].y = y;
1285             }
1286             if (!(flags & SWP_NOSIZE))
1287             {
1288                 pDWP->winPos[i].cx = cx;
1289                 pDWP->winPos[i].cy = cy;
1290             }
1291             pDWP->winPos[i].flags &= flags | ~(SWP_NOSIZE | SWP_NOMOVE |
1292                                                SWP_NOZORDER | SWP_NOREDRAW |
1293                                                SWP_NOACTIVATE | SWP_NOCOPYBITS|
1294                                                SWP_NOOWNERZORDER);
1295             pDWP->winPos[i].flags |= flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW |
1296                                               SWP_FRAMECHANGED);
1297             retvalue = hdwp;
1298             goto END;
1299         }
1300     }
1301     if (pDWP->actualCount >= pDWP->suggestedCount)
1302     {
1303         newhdwp = USER_HEAP_REALLOC( hdwp,
1304                       sizeof(DWP) + pDWP->suggestedCount*sizeof(WINDOWPOS) );
1305         if (!newhdwp)
1306         {
1307             retvalue = 0;
1308             goto END;
1309         }
1310         pDWP = (DWP *) USER_HEAP_LIN_ADDR( newhdwp );
1311         pDWP->suggestedCount++;
1312     }
1313     pDWP->winPos[pDWP->actualCount].hwnd = hwnd;
1314     pDWP->winPos[pDWP->actualCount].hwndInsertAfter = hwndAfter;
1315     pDWP->winPos[pDWP->actualCount].x = x;
1316     pDWP->winPos[pDWP->actualCount].y = y;
1317     pDWP->winPos[pDWP->actualCount].cx = cx;
1318     pDWP->winPos[pDWP->actualCount].cy = cy;
1319     pDWP->winPos[pDWP->actualCount].flags = flags;
1320     pDWP->actualCount++;
1321     retvalue = newhdwp;
1322 END:
1323     USER_Unlock();
1324     return retvalue;
1325 }
1326
1327
1328 /***********************************************************************
1329  *              EndDeferWindowPos (USER32.@)
1330  */
1331 BOOL WINAPI EndDeferWindowPos( HDWP hdwp )
1332 {
1333     DWP *pDWP;
1334     WINDOWPOS *winpos;
1335     BOOL res = TRUE;
1336     int i;
1337
1338     TRACE("%p\n", hdwp);
1339
1340     pDWP = (DWP *) USER_HEAP_LIN_ADDR( hdwp );
1341     if (!pDWP) return FALSE;
1342     for (i = 0, winpos = pDWP->winPos; i < pDWP->actualCount; i++, winpos++)
1343     {
1344         if (!(res = USER_Driver.pSetWindowPos( winpos ))) break;
1345     }
1346     USER_HEAP_FREE( hdwp );
1347     return res;
1348 }
1349
1350
1351 /***********************************************************************
1352  *              TileChildWindows (USER.199)
1353  */
1354 void WINAPI TileChildWindows16( HWND16 parent, WORD action )
1355 {
1356     FIXME("(%04x, %d): stub\n", parent, action);
1357 }
1358
1359 /***********************************************************************
1360  *              CascadeChildWindows (USER.198)
1361  */
1362 void WINAPI CascadeChildWindows16( HWND16 parent, WORD action )
1363 {
1364     FIXME("(%04x, %d): stub\n", parent, action);
1365 }