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     WND *wndPtr;
 231     BOOL ret;
 232
 233     if (hrgn)
 234     {
 235         RGNDATA *data;
 236         DWORD size;
 237
 238         if (!(size = GetRegionData( hrgn, 0, NULL ))) return FALSE;
 239         if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE;
 240         if (!GetRegionData( hrgn, size, data ))
 241         {
 242             HeapFree( GetProcessHeap(), 0, data );
 243             return FALSE;
 244         }
 245         SERVER_START_REQ( set_window_region )
 246         {
 247             req->window = hwnd;
 248             if (data->rdh.nCount)
 249                 wine_server_add_data( req, data->Buffer, data->rdh.nCount * sizeof(RECT) );
 250             else
 251                 wine_server_add_data( req, &empty_rect, sizeof(empty_rect) );
 252             ret = !wine_server_call_err( req );
 253         }
 254         SERVER_END_REQ;
 255     }
 256     else  /* clear existing region */
 257     {
 258         SERVER_START_REQ( set_window_region )
 259         {
 260             req->window = hwnd;
 261             ret = !wine_server_call_err( req );
 262         }
 263         SERVER_END_REQ;
 264     }
 265
 266     if (!ret) return FALSE;
 267
 268     if ((wndPtr = WIN_GetPtr( hwnd )) == WND_OTHER_PROCESS)
 269     {
 270         if (IsWindow( hwnd ))
 271             FIXME( "not properly supported on other process window %p\n", hwnd );
 272         wndPtr = NULL;
 273     }
 274     if (!wndPtr)
 275     {
 276         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
 277         return FALSE;
 278     }
 279
 280     if (wndPtr->hrgnWnd == hrgn)
 281     {
 282         WIN_ReleasePtr( wndPtr );
 283         return TRUE;
 284     }
 285     if (wndPtr->hrgnWnd)
 286     {
 287         /* delete previous region */
 288         DeleteObject(wndPtr->hrgnWnd);
 289         wndPtr->hrgnWnd = 0;
 290     }
 291     wndPtr->hrgnWnd = hrgn;
 292     WIN_ReleasePtr( wndPtr );
 293
 294     if (USER_Driver.pSetWindowRgn)
 295         ret = USER_Driver.pSetWindowRgn( hwnd, hrgn, bRedraw );
 296
 297     if (ret && bRedraw) RedrawWindow( hwnd, NULL, 0, RDW_FRAME | RDW_INVALIDATE | RDW_ERASE );
 298     return ret;
 299 }
 300
 301
 302 /***********************************************************************
 303  *              GetClientRect (USER32.@)
 304  */
 305 BOOL WINAPI GetClientRect( HWND hwnd, LPRECT rect )
 306 {
 307     BOOL ret;
 308
 309     rect->right = rect->bottom = 0;
 310     if ((ret = WIN_GetRectangles( hwnd, NULL, rect )))
 311     {
 312         rect->right -= rect->left;
 313         rect->bottom -= rect->top;
 314     }
 315     rect->left = rect->top = 0;
 316     return ret;
 317 }
 318
 319
 320 /*******************************************************************
 321  *              ClientToScreen (USER32.@)
 322  */
 323 BOOL WINAPI ClientToScreen( HWND hwnd, LPPOINT lppnt )
 324 {
 325     MapWindowPoints( hwnd, 0, lppnt, 1 );
 326     return TRUE;
 327 }
 328
 329
 330 /*******************************************************************
 331  *              ScreenToClient (USER32.@)
 332  */
 333 BOOL WINAPI ScreenToClient( HWND hwnd, LPPOINT lppnt )
 334 {
 335     MapWindowPoints( 0, hwnd, lppnt, 1 );
 336     return TRUE;
 337 }
 338
 339
 340 /***********************************************************************
 341  *           list_children_from_point
 342  *
 343  * Get the list of children that can contain point from the server.
 344  * Point is in screen coordinates.
 345  * Returned list must be freed by caller.
 346  */
 347 static HWND *list_children_from_point( HWND hwnd, POINT pt )
 348 {
 349     HWND *list;
 350     int size = 32;
 351
 352     for (;;)
 353     {
 354         int count = 0;
 355
 356         if (!(list = HeapAlloc( GetProcessHeap(), 0, size * sizeof(HWND) ))) break;
 357
 358         SERVER_START_REQ( get_window_children_from_point )
 359         {
 360             req->parent = hwnd;
 361             req->x = pt.x;
 362             req->y = pt.y;
 363             wine_server_set_reply( req, list, (size-1) * sizeof(HWND) );
 364             if (!wine_server_call( req )) count = reply->count;
 365         }
 366         SERVER_END_REQ;
 367         if (count && count < size)
 368         {
 369             list[count] = 0;
 370             return list;
 371         }
 372         HeapFree( GetProcessHeap(), 0, list );
 373         if (!count) break;
 374         size = count + 1;  /* restart with a large enough buffer */
 375     }
 376     return NULL;
 377 }
 378
 379
 380 /***********************************************************************
 381  *           WINPOS_WindowFromPoint
 382  *
 383  * Find the window and hittest for a given point.
 384  */
 385 HWND WINPOS_WindowFromPoint( HWND hwndScope, POINT pt, INT *hittest )
 386 {
 387     int i, res;
 388     HWND ret, *list;
 389
 390     if (!hwndScope) hwndScope = GetDesktopWindow();
 391
 392     *hittest = HTNOWHERE;
 393
 394     if (!(list = list_children_from_point( hwndScope, pt ))) return 0;
 395
 396     /* now determine the hittest */
 397
 398     for (i = 0; list[i]; i++)
 399     {
 400         LONG style = GetWindowLongW( list[i], GWL_STYLE );
 401
 402         /* If window is minimized or disabled, return at once */
 403         if (style & WS_MINIMIZE)
 404         {
 405             *hittest = HTCAPTION;
 406             break;
 407         }
 408         if (style & WS_DISABLED)
 409         {
 410             *hittest = HTERROR;
 411             break;
 412         }
 413         /* Send WM_NCCHITTEST (if same thread) */
 414         if (!WIN_IsCurrentThread( list[i] ))
 415         {
 416             *hittest = HTCLIENT;
 417             break;
 418         }
 419         res = SendMessageA( list[i], WM_NCHITTEST, 0, MAKELONG(pt.x,pt.y) );
 420         if (res != HTTRANSPARENT)
 421         {
 422             *hittest = res;  /* Found the window */
 423             break;
 424         }
 425         /* continue search with next window in z-order */
 426     }
 427     ret = list[i];
 428     HeapFree( GetProcessHeap(), 0, list );
 429     TRACE( "scope %p (%ld,%ld) returning %p\n", hwndScope, pt.x, pt.y, ret );
 430     return ret;
 431 }
 432
 433
 434 /*******************************************************************
 435  *              WindowFromPoint (USER32.@)
 436  */
 437 HWND WINAPI WindowFromPoint( POINT pt )
 438 {
 439     INT hittest;
 440     return WINPOS_WindowFromPoint( 0, pt, &hittest );
 441 }
 442
 443
 444 /*******************************************************************
 445  *              ChildWindowFromPoint (USER32.@)
 446  */
 447 HWND WINAPI ChildWindowFromPoint( HWND hwndParent, POINT pt )
 448 {
 449     return ChildWindowFromPointEx( hwndParent, pt, CWP_ALL );
 450 }
 451
 452 /*******************************************************************
 453  *              ChildWindowFromPointEx (USER32.@)
 454  */
 455 HWND WINAPI ChildWindowFromPointEx( HWND hwndParent, POINT pt, UINT uFlags)
 456 {
 457     /* pt is in the client coordinates */
 458     HWND *list;
 459     int i;
 460     RECT rect;
 461     HWND retvalue;
 462
 463     GetClientRect( hwndParent, &rect );
 464     if (!PtInRect( &rect, pt )) return 0;
 465     if (!(list = WIN_ListChildren( hwndParent ))) return 0;
 466
 467     for (i = 0; list[i]; i++)
 468     {
 469         if (!WIN_GetRectangles( list[i], &rect, NULL )) continue;
 470         if (!PtInRect( &rect, pt )) continue;
 471         if (uFlags & (CWP_SKIPINVISIBLE|CWP_SKIPDISABLED))
 472         {
 473             LONG style = GetWindowLongW( list[i], GWL_STYLE );
 474             if ((uFlags & CWP_SKIPINVISIBLE) && !(style & WS_VISIBLE)) continue;
 475             if ((uFlags & CWP_SKIPDISABLED) && (style & WS_DISABLED)) continue;
 476         }
 477         if (uFlags & CWP_SKIPTRANSPARENT)
 478         {
 479             if (GetWindowLongW( list[i], GWL_EXSTYLE ) & WS_EX_TRANSPARENT) continue;
 480         }
 481         break;
 482     }
 483     retvalue = list[i];
 484     HeapFree( GetProcessHeap(), 0, list );
 485     if (!retvalue) retvalue = hwndParent;
 486     return retvalue;
 487 }
 488
 489
 490 /*******************************************************************
 491  *         WINPOS_GetWinOffset
 492  *
 493  * Calculate the offset between the origin of the two windows. Used
 494  * to implement MapWindowPoints.
 495  */
 496 static void WINPOS_GetWinOffset( HWND hwndFrom, HWND hwndTo, POINT *offset )
 497 {
 498     WND * wndPtr;
 499
 500     offset->x = offset->y = 0;
 501
 502     /* Translate source window origin to screen coords */
 503     if (hwndFrom)
 504     {
 505         HWND hwnd = hwndFrom;
 506
 507         while (hwnd)
 508         {
 509             if (hwnd == hwndTo) return;
 510             if (!(wndPtr = WIN_GetPtr( hwnd )))
 511             {
 512                 ERR( "bad hwndFrom = %p\n", hwnd );
 513                 return;
 514             }
 515             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 516             offset->x += wndPtr->rectClient.left;
 517             offset->y += wndPtr->rectClient.top;
 518             hwnd = wndPtr->parent;
 519             WIN_ReleasePtr( wndPtr );
 520         }
 521     }
 522
 523     /* Translate origin to destination window coords */
 524     if (hwndTo)
 525     {
 526         HWND hwnd = hwndTo;
 527
 528         while (hwnd)
 529         {
 530             if (!(wndPtr = WIN_GetPtr( hwnd )))
 531             {
 532                 ERR( "bad hwndTo = %p\n", hwnd );
 533                 return;
 534             }
 535             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 536             offset->x -= wndPtr->rectClient.left;
 537             offset->y -= wndPtr->rectClient.top;
 538             hwnd = wndPtr->parent;
 539             WIN_ReleasePtr( wndPtr );
 540         }
 541     }
 542     return;
 543
 544  other_process:  /* one of the parents may belong to another process, do it the hard way */
 545     offset->x = offset->y = 0;
 546     SERVER_START_REQ( get_windows_offset )
 547     {
 548         req->from = hwndFrom;
 549         req->to   = hwndTo;
 550         if (!wine_server_call( req ))
 551         {
 552             offset->x = reply->x;
 553             offset->y = reply->y;
 554         }
 555     }
 556     SERVER_END_REQ;
 557 }
 558
 559
 560 /*******************************************************************
 561  *              MapWindowPoints (USER.258)
 562  */
 563 void WINAPI MapWindowPoints16( HWND16 hwndFrom, HWND16 hwndTo,
 564                                LPPOINT16 lppt, UINT16 count )
 565 {
 566     POINT offset;
 567
 568     WINPOS_GetWinOffset( WIN_Handle32(hwndFrom), WIN_Handle32(hwndTo), &offset );
 569     while (count--)
 570     {
 571         lppt->x += offset.x;
 572         lppt->y += offset.y;
 573         lppt++;
 574     }
 575 }
 576
 577
 578 /*******************************************************************
 579  *              MapWindowPoints (USER32.@)
 580  */
 581 INT WINAPI MapWindowPoints( HWND hwndFrom, HWND hwndTo, LPPOINT lppt, UINT count )
 582 {
 583     POINT offset;
 584
 585     WINPOS_GetWinOffset( hwndFrom, hwndTo, &offset );
 586     while (count--)
 587     {
 588         lppt->x += offset.x;
 589         lppt->y += offset.y;
 590         lppt++;
 591     }
 592     return MAKELONG( LOWORD(offset.x), LOWORD(offset.y) );
 593 }
 594
 595
 596 /***********************************************************************
 597  *              IsIconic (USER32.@)
 598  */
 599 BOOL WINAPI IsIconic(HWND hWnd)
 600 {
 601     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MINIMIZE) != 0;
 602 }
 603
 604
 605 /***********************************************************************
 606  *              IsZoomed (USER32.@)
 607  */
 608 BOOL WINAPI IsZoomed(HWND hWnd)
 609 {
 610     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MAXIMIZE) != 0;
 611 }
 612
 613
 614 /*******************************************************************
 615  *              AllowSetForegroundWindow (USER32.@)
 616  */
 617 BOOL WINAPI AllowSetForegroundWindow( DWORD procid )
 618 {
 619     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 620      * implemented, then fix this function. */
 621     return TRUE;
 622 }
 623
 624
 625 /*******************************************************************
 626  *              LockSetForegroundWindow (USER32.@)
 627  */
 628 BOOL WINAPI LockSetForegroundWindow( UINT lockcode )
 629 {
 630     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 631      * implemented, then fix this function. */
 632     return TRUE;
 633 }
 634
 635
 636 /***********************************************************************
 637  *              BringWindowToTop (USER32.@)
 638  */
 639 BOOL WINAPI BringWindowToTop( HWND hwnd )
 640 {
 641     return SetWindowPos( hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE );
 642 }
 643
 644
 645 /***********************************************************************
 646  *              MoveWindow (USER32.@)
 647  */
 648 BOOL WINAPI MoveWindow( HWND hwnd, INT x, INT y, INT cx, INT cy,
 649                             BOOL repaint )
 650 {
 651     int flags = SWP_NOZORDER | SWP_NOACTIVATE;
 652     if (!repaint) flags |= SWP_NOREDRAW;
 653     TRACE("%p %d,%d %dx%d %d\n", hwnd, x, y, cx, cy, repaint );
 654     return SetWindowPos( hwnd, 0, x, y, cx, cy, flags );
 655 }
 656
 657 /***********************************************************************
 658  *           WINPOS_InitInternalPos
 659  */
 660 static LPINTERNALPOS WINPOS_InitInternalPos( WND* wnd, POINT pt, const RECT *restoreRect )
 661 {
 662     LPINTERNALPOS lpPos = (LPINTERNALPOS) GetPropA( wnd->hwndSelf,
 663                                                       atomInternalPos );
 664     if( !lpPos )
 665     {
 666         /* this happens when the window is minimized/maximized
 667          * for the first time (rectWindow is not adjusted yet) */
 668
 669         lpPos = HeapAlloc( GetProcessHeap(), 0, sizeof(INTERNALPOS) );
 670         if( !lpPos ) return NULL;
 671
 672         SetPropA( wnd->hwndSelf, atomInternalPos, (HANDLE)lpPos );
 673         lpPos->hwndIconTitle = 0; /* defer until needs to be shown */
 674         CONV_RECT32TO16( &wnd->rectWindow, &lpPos->rectNormal );
 675         *(UINT*)&lpPos->ptIconPos = *(UINT*)&lpPos->ptMaxPos = 0xFFFFFFFF;
 676     }
 677
 678     if( wnd->dwStyle & WS_MINIMIZE )
 679         CONV_POINT32TO16( &pt, &lpPos->ptIconPos );
 680     else if( wnd->dwStyle & WS_MAXIMIZE )
 681         CONV_POINT32TO16( &pt, &lpPos->ptMaxPos );
 682     else if( restoreRect )
 683         CONV_RECT32TO16( restoreRect, &lpPos->rectNormal );
 684
 685     return lpPos;
 686 }
 687
 688 /***********************************************************************
 689  *           WINPOS_RedrawIconTitle
 690  */
 691 BOOL WINPOS_RedrawIconTitle( HWND hWnd )
 692 {
 693     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hWnd, atomInternalPos );
 694     if( lpPos )
 695     {
 696         if( lpPos->hwndIconTitle )
 697         {
 698             SendMessageA( lpPos->hwndIconTitle, WM_SHOWWINDOW, TRUE, 0);
 699             InvalidateRect( lpPos->hwndIconTitle, NULL, TRUE );
 700             return TRUE;
 701         }
 702     }
 703     return FALSE;
 704 }
 705
 706 /***********************************************************************
 707  *           WINPOS_ShowIconTitle
 708  */
 709 BOOL WINPOS_ShowIconTitle( HWND hwnd, BOOL bShow )
 710 {
 711     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 712
 713     if( lpPos && !(GetWindowLongA( hwnd, GWL_EXSTYLE) & WS_EX_MANAGED))
 714     {
 715         HWND title = lpPos->hwndIconTitle;
 716
 717         TRACE("%p %i\n", hwnd, (bShow != 0) );
 718
 719         if( !title )
 720             lpPos->hwndIconTitle = title = ICONTITLE_Create( hwnd );
 721         if( bShow )
 722         {
 723             if (!IsWindowVisible(title))
 724             {
 725                 SendMessageA( title, WM_SHOWWINDOW, TRUE, 0 );
 726                 SetWindowPos( title, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE |
 727                               SWP_NOACTIVATE | SWP_NOZORDER | SWP_SHOWWINDOW );
 728             }
 729         }
 730         else ShowWindow( title, SW_HIDE );
 731     }
 732     return FALSE;
 733 }
 734
 735 /*******************************************************************
 736  *           WINPOS_GetMinMaxInfo
 737  *
 738  * Get the minimized and maximized information for a window.
 739  */
 740 void WINPOS_GetMinMaxInfo( HWND hwnd, POINT *maxSize, POINT *maxPos,
 741                            POINT *minTrack, POINT *maxTrack )
 742 {
 743     LPINTERNALPOS lpPos;
 744     MINMAXINFO MinMax;
 745     INT xinc, yinc;
 746     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 747     LONG exstyle = GetWindowLongA( hwnd, GWL_EXSTYLE );
 748     RECT rc;
 749
 750     /* Compute default values */
 751
 752     GetWindowRect(hwnd, &rc);
 753     MinMax.ptReserved.x = rc.left;
 754     MinMax.ptReserved.y = rc.top;
 755
 756     if (style & WS_CHILD)
 757     {
 758         if ((style & WS_CAPTION) == WS_CAPTION)
 759             style &= ~WS_BORDER; /* WS_CAPTION = WS_DLGFRAME | WS_BORDER */
 760
 761         GetClientRect(GetParent(hwnd), &rc);
 762         AdjustWindowRectEx(&rc, style, 0, exstyle);
 763
 764         /* avoid calculating this twice */
 765         style &= ~(WS_DLGFRAME | WS_BORDER | WS_THICKFRAME);
 766
 767         MinMax.ptMaxSize.x = rc.right - rc.left;
 768         MinMax.ptMaxSize.y = rc.bottom - rc.top;
 769     }
 770     else
 771     {
 772         MinMax.ptMaxSize.x = GetSystemMetrics(SM_CXSCREEN);
 773         MinMax.ptMaxSize.y = GetSystemMetrics(SM_CYSCREEN);
 774     }
 775     MinMax.ptMinTrackSize.x = GetSystemMetrics(SM_CXMINTRACK);
 776     MinMax.ptMinTrackSize.y = GetSystemMetrics(SM_CYMINTRACK);
 777     MinMax.ptMaxTrackSize.x = GetSystemMetrics(SM_CXSCREEN);
 778     MinMax.ptMaxTrackSize.y = GetSystemMetrics(SM_CYSCREEN);
 779
 780     if (HAS_DLGFRAME( style, exstyle ))
 781     {
 782         xinc = GetSystemMetrics(SM_CXDLGFRAME);
 783         yinc = GetSystemMetrics(SM_CYDLGFRAME);
 784     }
 785     else
 786     {
 787         xinc = yinc = 0;
 788         if (HAS_THICKFRAME(style))
 789         {
 790             xinc += GetSystemMetrics(SM_CXFRAME);
 791             yinc += GetSystemMetrics(SM_CYFRAME);
 792         }
 793         if (style & WS_BORDER)
 794         {
 795             xinc += GetSystemMetrics(SM_CXBORDER);
 796             yinc += GetSystemMetrics(SM_CYBORDER);
 797         }
 798     }
 799     MinMax.ptMaxSize.x += 2 * xinc;
 800     MinMax.ptMaxSize.y += 2 * yinc;
 801
 802     lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 803     if( lpPos && !EMPTYPOINT(lpPos->ptMaxPos) )
 804         CONV_POINT16TO32( &lpPos->ptMaxPos, &MinMax.ptMaxPosition );
 805     else
 806     {
 807         MinMax.ptMaxPosition.x = -xinc;
 808         MinMax.ptMaxPosition.y = -yinc;
 809     }
 810
 811     SendMessageA( hwnd, WM_GETMINMAXINFO, 0, (LPARAM)&MinMax );
 812
 813       /* Some sanity checks */
 814
 815     TRACE("%ld %ld / %ld %ld / %ld %ld / %ld %ld\n",
 816                       MinMax.ptMaxSize.x, MinMax.ptMaxSize.y,
 817                       MinMax.ptMaxPosition.x, MinMax.ptMaxPosition.y,
 818                       MinMax.ptMaxTrackSize.x, MinMax.ptMaxTrackSize.y,
 819                       MinMax.ptMinTrackSize.x, MinMax.ptMinTrackSize.y);
 820     MinMax.ptMaxTrackSize.x = max( MinMax.ptMaxTrackSize.x,
 821                                    MinMax.ptMinTrackSize.x );
 822     MinMax.ptMaxTrackSize.y = max( MinMax.ptMaxTrackSize.y,
 823                                    MinMax.ptMinTrackSize.y );
 824
 825     if (maxSize) *maxSize = MinMax.ptMaxSize;
 826     if (maxPos) *maxPos = MinMax.ptMaxPosition;
 827     if (minTrack) *minTrack = MinMax.ptMinTrackSize;
 828     if (maxTrack) *maxTrack = MinMax.ptMaxTrackSize;
 829 }
 830
 831 /***********************************************************************
 832  *              ShowWindowAsync (USER32.@)
 833  *
 834  * doesn't wait; returns immediately.
 835  * used by threads to toggle windows in other (possibly hanging) threads
 836  */
 837 BOOL WINAPI ShowWindowAsync( HWND hwnd, INT cmd )
 838 {
 839     HWND full_handle;
 840
 841     if (is_broadcast(hwnd))
 842     {
 843         SetLastError( ERROR_INVALID_PARAMETER );
 844         return FALSE;
 845     }
 846
 847     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 848         return USER_Driver.pShowWindow( full_handle, cmd );
 849     return SendNotifyMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 850 }
 851
 852
 853 /***********************************************************************
 854  *              ShowWindow (USER32.@)
 855  */
 856 BOOL WINAPI ShowWindow( HWND hwnd, INT cmd )
 857 {
 858     HWND full_handle;
 859
 860     if (is_broadcast(hwnd))
 861     {
 862         SetLastError( ERROR_INVALID_PARAMETER );
 863         return FALSE;
 864     }
 865     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 866     {
 867         if (USER_Driver.pShowWindow)
 868             return USER_Driver.pShowWindow( full_handle, cmd );
 869         return FALSE;
 870     }
 871     return SendMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 872 }
 873
 874
 875 /***********************************************************************
 876  *              GetInternalWindowPos (USER32.@)
 877  */
 878 UINT WINAPI GetInternalWindowPos( HWND hwnd, LPRECT rectWnd,
 879                                       LPPOINT ptIcon )
 880 {
 881     WINDOWPLACEMENT wndpl;
 882     if (GetWindowPlacement( hwnd, &wndpl ))
 883     {
 884         if (rectWnd) *rectWnd = wndpl.rcNormalPosition;
 885         if (ptIcon)  *ptIcon = wndpl.ptMinPosition;
 886         return wndpl.showCmd;
 887     }
 888     return 0;
 889 }
 890
 891
 892 /***********************************************************************
 893  *              GetWindowPlacement (USER32.@)
 894  *
 895  * Win95:
 896  * Fails if wndpl->length of Win95 (!) apps is invalid.
 897  */
 898 BOOL WINAPI GetWindowPlacement( HWND hwnd, WINDOWPLACEMENT *wndpl )
 899 {
 900     WND *pWnd = WIN_FindWndPtr( hwnd );
 901     LPINTERNALPOS lpPos;
 902
 903     if(!pWnd ) return FALSE;
 904
 905     lpPos = WINPOS_InitInternalPos( pWnd, *(LPPOINT)&pWnd->rectWindow.left, &pWnd->rectWindow );
 906     wndpl->length  = sizeof(*wndpl);
 907     if( pWnd->dwStyle & WS_MINIMIZE )
 908         wndpl->showCmd = SW_SHOWMINIMIZED;
 909     else
 910         wndpl->showCmd = ( pWnd->dwStyle & WS_MAXIMIZE ) ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL ;
 911     if( pWnd->flags & WIN_RESTORE_MAX )
 912         wndpl->flags = WPF_RESTORETOMAXIMIZED;
 913     else
 914         wndpl->flags = 0;
 915     CONV_POINT16TO32( &lpPos->ptIconPos, &wndpl->ptMinPosition );
 916     CONV_POINT16TO32( &lpPos->ptMaxPos, &wndpl->ptMaxPosition );
 917     CONV_RECT16TO32( &lpPos->rectNormal, &wndpl->rcNormalPosition );
 918     WIN_ReleaseWndPtr(pWnd);
 919     return TRUE;
 920 }
 921
 922
 923 /***********************************************************************
 924  *           WINPOS_SetPlacement
 925  */
 926 static BOOL WINPOS_SetPlacement( HWND hwnd, const WINDOWPLACEMENT *wndpl, UINT flags )
 927 {
 928     WND *pWnd = WIN_FindWndPtr( hwnd );
 929     if( pWnd )
 930     {
 931         LPINTERNALPOS lpPos = (LPINTERNALPOS)WINPOS_InitInternalPos( pWnd,
 932                              *(LPPOINT)&pWnd->rectWindow.left, &pWnd->rectWindow );
 933
 934         if( flags & PLACE_MIN ) CONV_POINT32TO16( &wndpl->ptMinPosition, &lpPos->ptIconPos );
 935         if( flags & PLACE_MAX ) CONV_POINT32TO16( &wndpl->ptMaxPosition, &lpPos->ptMaxPos );
 936         if( flags & PLACE_RECT) CONV_RECT32TO16( &wndpl->rcNormalPosition, &lpPos->rectNormal );
 937
 938         if( pWnd->dwStyle & WS_MINIMIZE )
 939         {
 940             WINPOS_ShowIconTitle( pWnd->hwndSelf, FALSE );
 941             if( wndpl->flags & WPF_SETMINPOSITION && !EMPTYPOINT(lpPos->ptIconPos))
 942                 SetWindowPos( hwnd, 0, lpPos->ptIconPos.x, lpPos->ptIconPos.y,
 943                                 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 944         }
 945         else if( pWnd->dwStyle & WS_MAXIMIZE )
 946         {
 947             if( !EMPTYPOINT(lpPos->ptMaxPos) )
 948                 SetWindowPos( hwnd, 0, lpPos->ptMaxPos.x, lpPos->ptMaxPos.y,
 949                                 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 950         }
 951         else if( flags & PLACE_RECT )
 952                 SetWindowPos( hwnd, 0, lpPos->rectNormal.left, lpPos->rectNormal.top,
 953                                 lpPos->rectNormal.right - lpPos->rectNormal.left,
 954                                 lpPos->rectNormal.bottom - lpPos->rectNormal.top,
 955                                 SWP_NOZORDER | SWP_NOACTIVATE );
 956
 957         ShowWindow( hwnd, wndpl->showCmd );
 958         if( IsWindow(hwnd) && pWnd->dwStyle & WS_MINIMIZE )
 959         {
 960             if( pWnd->dwStyle & WS_VISIBLE ) WINPOS_ShowIconTitle( pWnd->hwndSelf, TRUE );
 961
 962             /* SDK: ...valid only the next time... */
 963             if( wndpl->flags & WPF_RESTORETOMAXIMIZED ) pWnd->flags |= WIN_RESTORE_MAX;
 964         }
 965         WIN_ReleaseWndPtr(pWnd);
 966         return TRUE;
 967     }
 968     return FALSE;
 969 }
 970
 971
 972 /***********************************************************************
 973  *              SetWindowPlacement (USER32.@)
 974  *
 975  * Win95:
 976  * Fails if wndpl->length of Win95 (!) apps is invalid.
 977  */
 978 BOOL WINAPI SetWindowPlacement( HWND hwnd, const WINDOWPLACEMENT *wpl )
 979 {
 980     if (!wpl) return FALSE;
 981     return WINPOS_SetPlacement( hwnd, wpl, PLACE_MIN | PLACE_MAX | PLACE_RECT );
 982 }
 983
 984
 985 /***********************************************************************
 986  *              AnimateWindow (USER32.@)
 987  *              Shows/Hides a window with an animation
 988  *              NO ANIMATION YET
 989  */
 990 BOOL WINAPI AnimateWindow(HWND hwnd, DWORD dwTime, DWORD dwFlags)
 991 {
 992         FIXME("partial stub\n");
 993
 994         /* If trying to show/hide and it's already   *
 995          * shown/hidden or invalid window, fail with *
 996          * invalid parameter                         */
 997         if(!IsWindow(hwnd) ||
 998            (IsWindowVisible(hwnd) && !(dwFlags & AW_HIDE)) ||
 999            (!IsWindowVisible(hwnd) && (dwFlags & AW_HIDE)))
1000         {
1001                 SetLastError(ERROR_INVALID_PARAMETER);
1002                 return FALSE;
1003         }
1004
1005         ShowWindow(hwnd, (dwFlags & AW_HIDE) ? SW_HIDE : ((dwFlags & AW_ACTIVATE) ? SW_SHOW : SW_SHOWNA));
1006
1007         return TRUE;
1008 }
1009
1010 /***********************************************************************
1011  *              SetInternalWindowPos (USER32.@)
1012  */
1013 void WINAPI SetInternalWindowPos( HWND hwnd, UINT showCmd,
1014                                     LPRECT rect, LPPOINT pt )
1015 {
1016     if( IsWindow(hwnd) )
1017     {
1018         WINDOWPLACEMENT wndpl;
1019         UINT flags;
1020
1021         wndpl.length  = sizeof(wndpl);
1022         wndpl.showCmd = showCmd;
1023         wndpl.flags = flags = 0;
1024
1025         if( pt )
1026         {
1027             flags |= PLACE_MIN;
1028             wndpl.flags |= WPF_SETMINPOSITION;
1029             wndpl.ptMinPosition = *pt;
1030         }
1031         if( rect )
1032         {
1033             flags |= PLACE_RECT;
1034             wndpl.rcNormalPosition = *rect;
1035         }
1036         WINPOS_SetPlacement( hwnd, &wndpl, flags );
1037     }
1038 }
1039
1040
1041 /*******************************************************************
1042  *         can_activate_window
1043  *
1044  * Check if we can activate the specified window.
1045  */
1046 static BOOL can_activate_window( HWND hwnd )
1047 {
1048     LONG style;
1049
1050     if (!hwnd) return FALSE;
1051     style = GetWindowLongW( hwnd, GWL_STYLE );
1052     if (!(style & WS_VISIBLE)) return FALSE;
1053     if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return FALSE;
1054     return !(style & WS_DISABLED);
1055 }
1056
1057
1058 /*******************************************************************
1059  *         WINPOS_ActivateOtherWindow
1060  *
1061  *  Activates window other than pWnd.
1062  */
1063 void WINPOS_ActivateOtherWindow(HWND hwnd)
1064 {
1065     HWND hwndTo, fg;
1066
1067     if ((GetWindowLongW( hwnd, GWL_STYLE ) & WS_POPUP) && (hwndTo = GetWindow( hwnd, GW_OWNER )))
1068     {
1069         hwndTo = GetAncestor( hwndTo, GA_ROOT );
1070         if (can_activate_window( hwndTo )) goto done;
1071     }
1072
1073     hwndTo = hwnd;
1074     for (;;)
1075     {
1076         if (!(hwndTo = GetWindow( hwndTo, GW_HWNDNEXT ))) break;
1077         if (can_activate_window( hwndTo )) break;
1078     }
1079
1080  done:
1081     fg = GetForegroundWindow();
1082     TRACE("win = %p fg = %p\n", hwndTo, fg);
1083     if (!fg || (hwnd == fg))
1084     {
1085         if (SetForegroundWindow( hwndTo )) return;
1086     }
1087     if (!SetActiveWindow( hwndTo )) SetActiveWindow(0);
1088 }
1089
1090
1091 /***********************************************************************
1092  *           WINPOS_HandleWindowPosChanging16
1093  *
1094  * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
1095  */
1096 LONG WINPOS_HandleWindowPosChanging16( HWND hwnd, WINDOWPOS16 *winpos )
1097 {
1098     POINT minTrack, maxTrack;
1099     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1100
1101     if (winpos->flags & SWP_NOSIZE) return 0;
1102     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
1103     {
1104         WINPOS_GetMinMaxInfo( hwnd, NULL, NULL, &minTrack, &maxTrack );
1105         if (winpos->cx > maxTrack.x) winpos->cx = maxTrack.x;
1106         if (winpos->cy > maxTrack.y) winpos->cy = maxTrack.y;
1107         if (!(style & WS_MINIMIZE))
1108         {
1109             if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
1110             if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
1111         }
1112     }
1113     return 0;
1114 }
1115
1116
1117 /***********************************************************************
1118  *           WINPOS_HandleWindowPosChanging
1119  *
1120  * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
1121  */
1122 LONG WINPOS_HandleWindowPosChanging( HWND hwnd, WINDOWPOS *winpos )
1123 {
1124     POINT minTrack, maxTrack;
1125     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1126
1127     if (winpos->flags & SWP_NOSIZE) return 0;
1128     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
1129     {
1130         WINPOS_GetMinMaxInfo( hwnd, NULL, NULL, &minTrack, &maxTrack );
1131         if (winpos->cx > maxTrack.x) winpos->cx = maxTrack.x;
1132         if (winpos->cy > maxTrack.y) winpos->cy = maxTrack.y;
1133         if (!(style & WS_MINIMIZE))
1134         {
1135             if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
1136             if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
1137         }
1138     }
1139     return 0;
1140 }
1141
1142
1143 /***********************************************************************
1144  *           dump_winpos_flags
1145  */
1146 static void dump_winpos_flags(UINT flags)
1147 {
1148     TRACE("flags:");
1149     if(flags & SWP_NOSIZE) TRACE(" SWP_NOSIZE");
1150     if(flags & SWP_NOMOVE) TRACE(" SWP_NOMOVE");
1151     if(flags & SWP_NOZORDER) TRACE(" SWP_NOZORDER");
1152     if(flags & SWP_NOREDRAW) TRACE(" SWP_NOREDRAW");
1153     if(flags & SWP_NOACTIVATE) TRACE(" SWP_NOACTIVATE");
1154     if(flags & SWP_FRAMECHANGED) TRACE(" SWP_FRAMECHANGED");
1155     if(flags & SWP_SHOWWINDOW) TRACE(" SWP_SHOWWINDOW");
1156     if(flags & SWP_HIDEWINDOW) TRACE(" SWP_HIDEWINDOW");
1157     if(flags & SWP_NOCOPYBITS) TRACE(" SWP_NOCOPYBITS");
1158     if(flags & SWP_NOOWNERZORDER) TRACE(" SWP_NOOWNERZORDER");
1159     if(flags & SWP_NOSENDCHANGING) TRACE(" SWP_NOSENDCHANGING");
1160     if(flags & SWP_DEFERERASE) TRACE(" SWP_DEFERERASE");
1161     if(flags & SWP_ASYNCWINDOWPOS) TRACE(" SWP_ASYNCWINDOWPOS");
1162
1163 #define DUMPED_FLAGS \
1164     (SWP_NOSIZE | \
1165     SWP_NOMOVE | \
1166     SWP_NOZORDER | \
1167     SWP_NOREDRAW | \
1168     SWP_NOACTIVATE | \
1169     SWP_FRAMECHANGED | \
1170     SWP_SHOWWINDOW | \
1171     SWP_HIDEWINDOW | \
1172     SWP_NOCOPYBITS | \
1173     SWP_NOOWNERZORDER | \
1174     SWP_NOSENDCHANGING | \
1175     SWP_DEFERERASE | \
1176     SWP_ASYNCWINDOWPOS)
1177
1178     if(flags & ~DUMPED_FLAGS) TRACE(" %08x", flags & ~DUMPED_FLAGS);
1179     TRACE("\n");
1180 #undef DUMPED_FLAGS
1181 }
1182
1183 /***********************************************************************
1184  *              SetWindowPos (USER32.@)
1185  */
1186 BOOL WINAPI SetWindowPos( HWND hwnd, HWND hwndInsertAfter,
1187                           INT x, INT y, INT cx, INT cy, UINT flags )
1188 {
1189     WINDOWPOS winpos;
1190
1191     TRACE("hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1192           hwnd, hwndInsertAfter, x, y, cx, cy, flags);
1193     if(TRACE_ON(win)) dump_winpos_flags(flags);
1194
1195     if (is_broadcast(hwnd))
1196     {
1197         SetLastError( ERROR_INVALID_PARAMETER );
1198         return FALSE;
1199     }
1200
1201     winpos.hwnd = WIN_GetFullHandle(hwnd);
1202     winpos.hwndInsertAfter = WIN_GetFullHandle(hwndInsertAfter);
1203     winpos.x = x;
1204     winpos.y = y;
1205     winpos.cx = cx;
1206     winpos.cy = cy;
1207     winpos.flags = flags;
1208     if (WIN_IsCurrentThread( hwnd )) return USER_Driver.pSetWindowPos( &winpos );
1209     return SendMessageW( winpos.hwnd, WM_WINE_SETWINDOWPOS, 0, (LPARAM)&winpos );
1210 }
1211
1212
1213 /***********************************************************************
1214  *              BeginDeferWindowPos (USER32.@)
1215  */
1216 HDWP WINAPI BeginDeferWindowPos( INT count )
1217 {
1218     HDWP handle;
1219     DWP *pDWP;
1220
1221     TRACE("%d\n", count);
1222
1223     if (count < 0)
1224     {
1225         SetLastError(ERROR_INVALID_PARAMETER);
1226         return 0;
1227     }
1228     /* Windows allows zero count, in which case it allocates context for 8 moves */
1229     if (count == 0) count = 8;
1230
1231     handle = USER_HEAP_ALLOC( sizeof(DWP) + (count-1)*sizeof(WINDOWPOS) );
1232     if (!handle) return 0;
1233     pDWP = (DWP *) USER_HEAP_LIN_ADDR( handle );
1234     pDWP->actualCount    = 0;
1235     pDWP->suggestedCount = count;
1236     pDWP->valid          = TRUE;
1237     pDWP->wMagic         = DWP_MAGIC;
1238     pDWP->hwndParent     = 0;
1239
1240     TRACE("returning hdwp %p\n", handle);
1241     return handle;
1242 }
1243
1244
1245 /***********************************************************************
1246  *              DeferWindowPos (USER32.@)
1247  */
1248 HDWP WINAPI DeferWindowPos( HDWP hdwp, HWND hwnd, HWND hwndAfter,
1249                                 INT x, INT y, INT cx, INT cy,
1250                                 UINT flags )
1251 {
1252     DWP *pDWP;
1253     int i;
1254     HDWP newhdwp = hdwp,retvalue;
1255
1256     TRACE("hdwp %p, hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1257           hdwp, hwnd, hwndAfter, x, y, cx, cy, flags);
1258
1259     hwnd = WIN_GetFullHandle( hwnd );
1260     if (hwnd == GetDesktopWindow()) return 0;
1261
1262     if (!(pDWP = USER_HEAP_LIN_ADDR( hdwp ))) return 0;
1263
1264     USER_Lock();
1265
1266     for (i = 0; i < pDWP->actualCount; i++)
1267     {
1268         if (pDWP->winPos[i].hwnd == hwnd)
1269         {
1270               /* Merge with the other changes */
1271             if (!(flags & SWP_NOZORDER))
1272             {
1273                 pDWP->winPos[i].hwndInsertAfter = WIN_GetFullHandle(hwndAfter);
1274             }
1275             if (!(flags & SWP_NOMOVE))
1276             {
1277                 pDWP->winPos[i].x = x;
1278                 pDWP->winPos[i].y = y;
1279             }
1280             if (!(flags & SWP_NOSIZE))
1281             {
1282                 pDWP->winPos[i].cx = cx;
1283                 pDWP->winPos[i].cy = cy;
1284             }
1285             pDWP->winPos[i].flags &= flags | ~(SWP_NOSIZE | SWP_NOMOVE |
1286                                                SWP_NOZORDER | SWP_NOREDRAW |
1287                                                SWP_NOACTIVATE | SWP_NOCOPYBITS|
1288                                                SWP_NOOWNERZORDER);
1289             pDWP->winPos[i].flags |= flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW |
1290                                               SWP_FRAMECHANGED);
1291             retvalue = hdwp;
1292             goto END;
1293         }
1294     }
1295     if (pDWP->actualCount >= pDWP->suggestedCount)
1296     {
1297         newhdwp = USER_HEAP_REALLOC( hdwp,
1298                       sizeof(DWP) + pDWP->suggestedCount*sizeof(WINDOWPOS) );
1299         if (!newhdwp)
1300         {
1301             retvalue = 0;
1302             goto END;
1303         }
1304         pDWP = (DWP *) USER_HEAP_LIN_ADDR( newhdwp );
1305         pDWP->suggestedCount++;
1306     }
1307     pDWP->winPos[pDWP->actualCount].hwnd = hwnd;
1308     pDWP->winPos[pDWP->actualCount].hwndInsertAfter = hwndAfter;
1309     pDWP->winPos[pDWP->actualCount].x = x;
1310     pDWP->winPos[pDWP->actualCount].y = y;
1311     pDWP->winPos[pDWP->actualCount].cx = cx;
1312     pDWP->winPos[pDWP->actualCount].cy = cy;
1313     pDWP->winPos[pDWP->actualCount].flags = flags;
1314     pDWP->actualCount++;
1315     retvalue = newhdwp;
1316 END:
1317     USER_Unlock();
1318     return retvalue;
1319 }
1320
1321
1322 /***********************************************************************
1323  *              EndDeferWindowPos (USER32.@)
1324  */
1325 BOOL WINAPI EndDeferWindowPos( HDWP hdwp )
1326 {
1327     DWP *pDWP;
1328     WINDOWPOS *winpos;
1329     BOOL res = TRUE;
1330     int i;
1331
1332     TRACE("%p\n", hdwp);
1333
1334     pDWP = (DWP *) USER_HEAP_LIN_ADDR( hdwp );
1335     if (!pDWP) return FALSE;
1336     for (i = 0, winpos = pDWP->winPos; i < pDWP->actualCount; i++, winpos++)
1337     {
1338         if (!(res = USER_Driver.pSetWindowPos( winpos ))) break;
1339     }
1340     USER_HEAP_FREE( hdwp );
1341     return res;
1342 }
1343
1344
1345 /***********************************************************************
1346  *              TileChildWindows (USER.199)
1347  */
1348 void WINAPI TileChildWindows16( HWND16 parent, WORD action )
1349 {
1350     FIXME("(%04x, %d): stub\n", parent, action);
1351 }
1352
1353 /***********************************************************************
1354  *              CascadeChildWindows (USER.198)
1355  */
1356 void WINAPI CascadeChildWindows16( HWND16 parent, WORD action )
1357 {
1358     FIXME("(%04x, %d): stub\n", parent, action);
1359 }