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 <stdarg.h>
  23 #include <string.h>
  24 #include "winerror.h"
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wingdi.h"
  28 #include "winerror.h"
  29 #include "wine/winuser16.h"
  30 #include "wine/server.h"
  31 #include "controls.h"
  32 #include "user.h"
  33 #include "win.h"
  34 #include "message.h"
  35 #include "winpos.h"
  36 #include "nonclient.h"
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(win);
  40
  41 #define HAS_DLGFRAME(style,exStyle) \
  42     (((exStyle) & WS_EX_DLGMODALFRAME) || \
  43      (((style) & WS_DLGFRAME) && !((style) & WS_BORDER)))
  44
  45 #define HAS_THICKFRAME(style) \
  46     (((style) & WS_THICKFRAME) && \
  47      !(((style) & (WS_DLGFRAME|WS_BORDER)) == WS_DLGFRAME))
  48
  49 #define EMPTYPOINT(pt)          ((*(LONG*)&(pt)) == -1)
  50
  51 #define PLACE_MIN               0x0001
  52 #define PLACE_MAX               0x0002
  53 #define PLACE_RECT              0x0004
  54
  55
  56 #define DWP_MAGIC  ((INT)('W' | ('P' << 8) | ('O' << 16) | ('S' << 24)))
  57
  58 typedef struct
  59 {
  60     INT       actualCount;
  61     INT       suggestedCount;
  62     BOOL      valid;
  63     INT       wMagic;
  64     HWND      hwndParent;
  65     WINDOWPOS winPos[1];
  66 } DWP;
  67
  68 /* ----- internal variables ----- */
  69
  70 static LPCSTR atomInternalPos;
  71
  72
  73 /***********************************************************************
  74  *           WINPOS_CreateInternalPosAtom
  75  */
  76 BOOL WINPOS_CreateInternalPosAtom()
  77 {
  78     LPCSTR str = "SysIP";
  79     atomInternalPos = (LPCSTR)(DWORD)GlobalAddAtomA(str);
  80     return (atomInternalPos) ? TRUE : FALSE;
  81 }
  82
  83 /***********************************************************************
  84  *           WINPOS_CheckInternalPos
  85  *
  86  * Called when a window is destroyed.
  87  */
  88 void WINPOS_CheckInternalPos( HWND hwnd )
  89 {
  90     LPINTERNALPOS lpPos = (LPINTERNALPOS) GetPropA( hwnd, atomInternalPos );
  91
  92     if( lpPos )
  93     {
  94         if( IsWindow(lpPos->hwndIconTitle) )
  95             DestroyWindow( lpPos->hwndIconTitle );
  96         HeapFree( GetProcessHeap(), 0, lpPos );
  97     }
  98 }
  99
 100 /***********************************************************************
 101  *              ArrangeIconicWindows (USER32.@)
 102  */
 103 UINT WINAPI ArrangeIconicWindows( HWND parent )
 104 {
 105     RECT rectParent;
 106     HWND hwndChild;
 107     INT x, y, xspacing, yspacing;
 108
 109     GetClientRect( parent, &rectParent );
 110     x = rectParent.left;
 111     y = rectParent.bottom;
 112     xspacing = GetSystemMetrics(SM_CXICONSPACING);
 113     yspacing = GetSystemMetrics(SM_CYICONSPACING);
 114
 115     hwndChild = GetWindow( parent, GW_CHILD );
 116     while (hwndChild)
 117     {
 118         if( IsIconic( hwndChild ) )
 119         {
 120             WINPOS_ShowIconTitle( hwndChild, FALSE );
 121
 122             SetWindowPos( hwndChild, 0, x + (xspacing - GetSystemMetrics(SM_CXICON)) / 2,
 123                             y - yspacing - GetSystemMetrics(SM_CYICON)/2, 0, 0,
 124                             SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 125             if( IsWindow(hwndChild) )
 126                 WINPOS_ShowIconTitle(hwndChild , TRUE );
 127
 128             if (x <= rectParent.right - xspacing) x += xspacing;
 129             else
 130             {
 131                 x = rectParent.left;
 132                 y -= yspacing;
 133             }
 134         }
 135         hwndChild = GetWindow( hwndChild, GW_HWNDNEXT );
 136     }
 137     return yspacing;
 138 }
 139
 140
 141 /***********************************************************************
 142  *              SwitchToThisWindow (USER32.@)
 143  */
 144 void WINAPI SwitchToThisWindow( HWND hwnd, BOOL restore )
 145 {
 146     ShowWindow( hwnd, restore ? SW_RESTORE : SW_SHOWMINIMIZED );
 147 }
 148
 149
 150 /***********************************************************************
 151  *              GetWindowRect (USER32.@)
 152  */
 153 BOOL WINAPI GetWindowRect( HWND hwnd, LPRECT rect )
 154 {
 155     BOOL ret = WIN_GetRectangles( hwnd, rect, NULL );
 156     if (ret)
 157     {
 158         MapWindowPoints( GetAncestor( hwnd, GA_PARENT ), 0, (POINT *)rect, 2 );
 159         TRACE( "hwnd %p (%ld,%ld)-(%ld,%ld)\n",
 160                hwnd, rect->left, rect->top, rect->right, rect->bottom);
 161     }
 162     return ret;
 163 }
 164
 165
 166 /***********************************************************************
 167  *              GetWindowRgn (USER32.@)
 168  */
 169 int WINAPI GetWindowRgn ( HWND hwnd, HRGN hrgn )
 170 {
 171     int nRet = ERROR;
 172     WND *wndPtr = WIN_GetPtr( hwnd );
 173
 174     if (wndPtr == WND_OTHER_PROCESS)
 175     {
 176         if (IsWindow( hwnd ))
 177             FIXME( "not supported on other process window %p\n", hwnd );
 178         wndPtr = NULL;
 179     }
 180     if (!wndPtr)
 181     {
 182         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
 183         return ERROR;
 184     }
 185     if (wndPtr->hrgnWnd) nRet = CombineRgn( hrgn, wndPtr->hrgnWnd, 0, RGN_COPY );
 186     WIN_ReleasePtr( wndPtr );
 187     return nRet;
 188 }
 189
 190
 191 /***********************************************************************
 192  *              SetWindowRgn (USER32.@)
 193  */
 194 int WINAPI SetWindowRgn( HWND hwnd, HRGN hrgn, BOOL bRedraw )
 195 {
 196     RECT rect;
 197     WND *wndPtr;
 198
 199     if (hrgn) /* verify that region really exists */
 200     {
 201         if (GetRgnBox( hrgn, &rect ) == ERROR) return FALSE;
 202     }
 203
 204     if (USER_Driver.pSetWindowRgn)
 205         return USER_Driver.pSetWindowRgn( hwnd, hrgn, bRedraw );
 206
 207     if ((wndPtr = WIN_GetPtr( hwnd )) == WND_OTHER_PROCESS)
 208     {
 209         if (IsWindow( hwnd ))
 210             FIXME( "not supported on other process window %p\n", hwnd );
 211         wndPtr = NULL;
 212     }
 213     if (!wndPtr)
 214     {
 215         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
 216         return FALSE;
 217     }
 218
 219     if (wndPtr->hrgnWnd == hrgn)
 220     {
 221         WIN_ReleasePtr( wndPtr );
 222         return TRUE;
 223     }
 224
 225     if (wndPtr->hrgnWnd)
 226     {
 227         /* delete previous region */
 228         DeleteObject(wndPtr->hrgnWnd);
 229         wndPtr->hrgnWnd = 0;
 230     }
 231     wndPtr->hrgnWnd = hrgn;
 232     WIN_ReleasePtr( wndPtr );
 233
 234     /* Size the window to the rectangle of the new region (if it isn't NULL) */
 235     if (hrgn) SetWindowPos( hwnd, 0, rect.left, rect.top,
 236                             rect.right  - rect.left, rect.bottom - rect.top,
 237                             SWP_NOSIZE | SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOACTIVATE |
 238                             SWP_NOZORDER | (bRedraw ? 0 : SWP_NOREDRAW) );
 239     return TRUE;
 240 }
 241
 242
 243 /***********************************************************************
 244  *              GetClientRect (USER32.@)
 245  */
 246 BOOL WINAPI GetClientRect( HWND hwnd, LPRECT rect )
 247 {
 248     BOOL ret;
 249
 250     rect->right = rect->bottom = 0;
 251     if ((ret = WIN_GetRectangles( hwnd, NULL, rect )))
 252     {
 253         rect->right -= rect->left;
 254         rect->bottom -= rect->top;
 255     }
 256     rect->left = rect->top = 0;
 257     return ret;
 258 }
 259
 260
 261 /*******************************************************************
 262  *              ClientToScreen (USER32.@)
 263  */
 264 BOOL WINAPI ClientToScreen( HWND hwnd, LPPOINT lppnt )
 265 {
 266     MapWindowPoints( hwnd, 0, lppnt, 1 );
 267     return TRUE;
 268 }
 269
 270
 271 /*******************************************************************
 272  *              ScreenToClient (USER32.@)
 273  */
 274 BOOL WINAPI ScreenToClient( HWND hwnd, LPPOINT lppnt )
 275 {
 276     MapWindowPoints( 0, hwnd, lppnt, 1 );
 277     return TRUE;
 278 }
 279
 280
 281 /***********************************************************************
 282  *           find_child_from_point
 283  *
 284  * Find the child that contains pt. Helper for WindowFromPoint.
 285  * pt is in parent client coordinates.
 286  * lparam is the param to pass in the WM_NCHITTEST message.
 287  */
 288 static HWND find_child_from_point( HWND parent, POINT pt, INT *hittest, LPARAM lparam )
 289 {
 290     int i, res;
 291     LONG style, exstyle;
 292     RECT rectWindow, rectClient;
 293     WND *wndPtr;
 294     HWND *list = WIN_ListChildren( parent );
 295     HWND retvalue = 0;
 296
 297     if (!list) return 0;
 298     for (i = 0; list[i]; i++)
 299     {
 300         /* If point is in window, and window is visible, and it  */
 301         /* is enabled (or it's a top-level window), then explore */
 302         /* its children. Otherwise, go to the next window.       */
 303
 304         style = GetWindowLongW( list[i], GWL_STYLE );
 305         if (!(style & WS_VISIBLE)) continue;  /* not visible -> skip */
 306         if ((style & (WS_POPUP | WS_CHILD | WS_DISABLED)) == (WS_CHILD | WS_DISABLED))
 307             continue;  /* disabled child -> skip */
 308         exstyle = GetWindowLongW( list[i], GWL_EXSTYLE );
 309         if ((exstyle & (WS_EX_LAYERED | WS_EX_TRANSPARENT)) == (WS_EX_LAYERED | WS_EX_TRANSPARENT))
 310             continue;  /* transparent -> skip */
 311
 312         if (!WIN_GetRectangles( list[i], &rectWindow, &rectClient )) continue;
 313         if (!PtInRect( &rectWindow, pt )) continue;  /* not in window -> skip */
 314
 315         /* FIXME: check window region for other processes too */
 316         if ((wndPtr = WIN_GetPtr( list[i] )) && wndPtr != WND_OTHER_PROCESS)
 317         {
 318             if (wndPtr->hrgnWnd && !PtInRegion( wndPtr->hrgnWnd,
 319                                                 pt.x - rectWindow.left, pt.y - rectWindow.top ))
 320             {
 321                 WIN_ReleasePtr( wndPtr );
 322                 continue;  /* point outside window region -> skip */
 323             }
 324             WIN_ReleasePtr( wndPtr );
 325         }
 326
 327         /* If window is minimized or disabled, return at once */
 328         if (style & WS_MINIMIZE)
 329         {
 330             *hittest = HTCAPTION;
 331             retvalue = list[i];
 332             break;
 333         }
 334         if (style & WS_DISABLED)
 335         {
 336             *hittest = HTERROR;
 337             retvalue = list[i];
 338             break;
 339         }
 340
 341         /* If point is in client area, explore children */
 342         if (PtInRect( &rectClient, pt ))
 343         {
 344             POINT new_pt;
 345
 346             new_pt.x = pt.x - rectClient.left;
 347             new_pt.y = pt.y - rectClient.top;
 348             if ((retvalue = find_child_from_point( list[i], new_pt, hittest, lparam ))) break;
 349         }
 350
 351         /* Now it's inside window, send WM_NCCHITTEST (if same thread) */
 352         if (!WIN_IsCurrentThread( list[i] ))
 353         {
 354             *hittest = HTCLIENT;
 355             retvalue = list[i];
 356             break;
 357         }
 358         if ((res = SendMessageA( list[i], WM_NCHITTEST, 0, lparam )) != HTTRANSPARENT)
 359         {
 360             *hittest = res;  /* Found the window */
 361             retvalue = list[i];
 362             break;
 363         }
 364         /* continue search with next sibling */
 365     }
 366     HeapFree( GetProcessHeap(), 0, list );
 367     return retvalue;
 368 }
 369
 370
 371 /***********************************************************************
 372  *           WINPOS_WindowFromPoint
 373  *
 374  * Find the window and hittest for a given point.
 375  */
 376 HWND WINPOS_WindowFromPoint( HWND hwndScope, POINT pt, INT *hittest )
 377 {
 378     POINT xy = pt;
 379     int res;
 380     LONG style;
 381
 382     TRACE("scope %p %ld,%ld\n", hwndScope, pt.x, pt.y);
 383
 384     if (!hwndScope) hwndScope = GetDesktopWindow();
 385     style = GetWindowLongW( hwndScope, GWL_STYLE );
 386
 387     *hittest = HTERROR;
 388     if (style & WS_DISABLED) return 0;
 389
 390     MapWindowPoints( GetDesktopWindow(), GetAncestor( hwndScope, GA_PARENT ), &xy, 1 );
 391
 392     if (!(style & WS_MINIMIZE))
 393     {
 394         RECT rectClient;
 395         if (WIN_GetRectangles( hwndScope, NULL, &rectClient ) && PtInRect( &rectClient, xy ))
 396         {
 397             HWND ret;
 398
 399             xy.x -= rectClient.left;
 400             xy.y -= rectClient.top;
 401             if ((ret = find_child_from_point( hwndScope, xy, hittest, MAKELONG( pt.x, pt.y ) )))
 402             {
 403                 TRACE( "found child %p\n", ret );
 404                 return ret;
 405             }
 406         }
 407     }
 408
 409     /* If nothing found, try the scope window */
 410     if (!WIN_IsCurrentThread( hwndScope ))
 411     {
 412         *hittest = HTCLIENT;
 413         TRACE( "returning %p\n", hwndScope );
 414         return hwndScope;
 415     }
 416     res = SendMessageA( hwndScope, WM_NCHITTEST, 0, MAKELONG( pt.x, pt.y ) );
 417     if (res != HTTRANSPARENT)
 418     {
 419         *hittest = res;  /* Found the window */
 420         TRACE( "returning %p\n", hwndScope );
 421         return hwndScope;
 422     }
 423     *hittest = HTNOWHERE;
 424     TRACE( "nothing found\n" );
 425     return 0;
 426 }
 427
 428
 429 /*******************************************************************
 430  *              WindowFromPoint (USER32.@)
 431  */
 432 HWND WINAPI WindowFromPoint( POINT pt )
 433 {
 434     INT hittest;
 435     return WINPOS_WindowFromPoint( 0, pt, &hittest );
 436 }
 437
 438
 439 /*******************************************************************
 440  *              ChildWindowFromPoint (USER32.@)
 441  */
 442 HWND WINAPI ChildWindowFromPoint( HWND hwndParent, POINT pt )
 443 {
 444     return ChildWindowFromPointEx( hwndParent, pt, CWP_ALL );
 445 }
 446
 447 /*******************************************************************
 448  *              ChildWindowFromPointEx (USER32.@)
 449  */
 450 HWND WINAPI ChildWindowFromPointEx( HWND hwndParent, POINT pt, UINT uFlags)
 451 {
 452     /* pt is in the client coordinates */
 453     HWND *list;
 454     int i;
 455     RECT rect;
 456     HWND retvalue;
 457
 458     GetClientRect( hwndParent, &rect );
 459     if (!PtInRect( &rect, pt )) return 0;
 460     if (!(list = WIN_ListChildren( hwndParent ))) return 0;
 461
 462     for (i = 0; list[i]; i++)
 463     {
 464         if (!WIN_GetRectangles( list[i], &rect, NULL )) continue;
 465         if (!PtInRect( &rect, pt )) continue;
 466         if (uFlags & (CWP_SKIPINVISIBLE|CWP_SKIPDISABLED))
 467         {
 468             LONG style = GetWindowLongW( list[i], GWL_STYLE );
 469             if ((uFlags & CWP_SKIPINVISIBLE) && !(style & WS_VISIBLE)) continue;
 470             if ((uFlags & CWP_SKIPDISABLED) && (style & WS_DISABLED)) continue;
 471         }
 472         if (uFlags & CWP_SKIPTRANSPARENT)
 473         {
 474             if (GetWindowLongW( list[i], GWL_EXSTYLE ) & WS_EX_TRANSPARENT) continue;
 475         }
 476         break;
 477     }
 478     retvalue = list[i];
 479     HeapFree( GetProcessHeap(), 0, list );
 480     if (!retvalue) retvalue = hwndParent;
 481     return retvalue;
 482 }
 483
 484
 485 /*******************************************************************
 486  *         WINPOS_GetWinOffset
 487  *
 488  * Calculate the offset between the origin of the two windows. Used
 489  * to implement MapWindowPoints.
 490  */
 491 static void WINPOS_GetWinOffset( HWND hwndFrom, HWND hwndTo, POINT *offset )
 492 {
 493     WND * wndPtr;
 494
 495     offset->x = offset->y = 0;
 496
 497     /* Translate source window origin to screen coords */
 498     if (hwndFrom)
 499     {
 500         HWND hwnd = hwndFrom;
 501
 502         while (hwnd)
 503         {
 504             if (hwnd == hwndTo) return;
 505             if (!(wndPtr = WIN_GetPtr( hwnd )))
 506             {
 507                 ERR( "bad hwndFrom = %p\n", hwnd );
 508                 return;
 509             }
 510             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 511             offset->x += wndPtr->rectClient.left;
 512             offset->y += wndPtr->rectClient.top;
 513             hwnd = wndPtr->parent;
 514             WIN_ReleasePtr( wndPtr );
 515         }
 516     }
 517
 518     /* Translate origin to destination window coords */
 519     if (hwndTo)
 520     {
 521         HWND hwnd = hwndTo;
 522
 523         while (hwnd)
 524         {
 525             if (!(wndPtr = WIN_GetPtr( hwnd )))
 526             {
 527                 ERR( "bad hwndTo = %p\n", hwnd );
 528                 return;
 529             }
 530             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 531             offset->x -= wndPtr->rectClient.left;
 532             offset->y -= wndPtr->rectClient.top;
 533             hwnd = wndPtr->parent;
 534             WIN_ReleasePtr( wndPtr );
 535         }
 536     }
 537     return;
 538
 539  other_process:  /* one of the parents may belong to another process, do it the hard way */
 540     offset->x = offset->y = 0;
 541     SERVER_START_REQ( get_windows_offset )
 542     {
 543         req->from = hwndFrom;
 544         req->to   = hwndTo;
 545         if (!wine_server_call( req ))
 546         {
 547             offset->x = reply->x;
 548             offset->y = reply->y;
 549         }
 550     }
 551     SERVER_END_REQ;
 552 }
 553
 554
 555 /*******************************************************************
 556  *              MapWindowPoints (USER.258)
 557  */
 558 void WINAPI MapWindowPoints16( HWND16 hwndFrom, HWND16 hwndTo,
 559                                LPPOINT16 lppt, UINT16 count )
 560 {
 561     POINT offset;
 562
 563     WINPOS_GetWinOffset( WIN_Handle32(hwndFrom), WIN_Handle32(hwndTo), &offset );
 564     while (count--)
 565     {
 566         lppt->x += offset.x;
 567         lppt->y += offset.y;
 568         lppt++;
 569     }
 570 }
 571
 572
 573 /*******************************************************************
 574  *              MapWindowPoints (USER32.@)
 575  */
 576 INT WINAPI MapWindowPoints( HWND hwndFrom, HWND hwndTo, LPPOINT lppt, UINT count )
 577 {
 578     POINT offset;
 579
 580     WINPOS_GetWinOffset( hwndFrom, hwndTo, &offset );
 581     while (count--)
 582     {
 583         lppt->x += offset.x;
 584         lppt->y += offset.y;
 585         lppt++;
 586     }
 587     return MAKELONG( LOWORD(offset.x), LOWORD(offset.y) );
 588 }
 589
 590
 591 /***********************************************************************
 592  *              IsIconic (USER32.@)
 593  */
 594 BOOL WINAPI IsIconic(HWND hWnd)
 595 {
 596     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MINIMIZE) != 0;
 597 }
 598
 599
 600 /***********************************************************************
 601  *              IsZoomed (USER32.@)
 602  */
 603 BOOL WINAPI IsZoomed(HWND hWnd)
 604 {
 605     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MAXIMIZE) != 0;
 606 }
 607
 608
 609 /*******************************************************************
 610  *              AllowSetForegroundWindow (USER32.@)
 611  */
 612 BOOL WINAPI AllowSetForegroundWindow( DWORD procid )
 613 {
 614     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 615      * implemented, then fix this function. */
 616     return TRUE;
 617 }
 618
 619
 620 /*******************************************************************
 621  *              LockSetForegroundWindow (USER32.@)
 622  */
 623 BOOL WINAPI LockSetForegroundWindow( UINT lockcode )
 624 {
 625     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 626      * implemented, then fix this function. */
 627     return TRUE;
 628 }
 629
 630
 631 /***********************************************************************
 632  *              BringWindowToTop (USER32.@)
 633  */
 634 BOOL WINAPI BringWindowToTop( HWND hwnd )
 635 {
 636     return SetWindowPos( hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE );
 637 }
 638
 639
 640 /***********************************************************************
 641  *              MoveWindow (USER32.@)
 642  */
 643 BOOL WINAPI MoveWindow( HWND hwnd, INT x, INT y, INT cx, INT cy,
 644                             BOOL repaint )
 645 {
 646     int flags = SWP_NOZORDER | SWP_NOACTIVATE;
 647     if (!repaint) flags |= SWP_NOREDRAW;
 648     TRACE("%p %d,%d %dx%d %d\n", hwnd, x, y, cx, cy, repaint );
 649     return SetWindowPos( hwnd, 0, x, y, cx, cy, flags );
 650 }
 651
 652 /***********************************************************************
 653  *           WINPOS_InitInternalPos
 654  */
 655 static LPINTERNALPOS WINPOS_InitInternalPos( WND* wnd, POINT pt, const RECT *restoreRect )
 656 {
 657     LPINTERNALPOS lpPos = (LPINTERNALPOS) GetPropA( wnd->hwndSelf,
 658                                                       atomInternalPos );
 659     if( !lpPos )
 660     {
 661         /* this happens when the window is minimized/maximized
 662          * for the first time (rectWindow is not adjusted yet) */
 663
 664         lpPos = HeapAlloc( GetProcessHeap(), 0, sizeof(INTERNALPOS) );
 665         if( !lpPos ) return NULL;
 666
 667         SetPropA( wnd->hwndSelf, atomInternalPos, (HANDLE)lpPos );
 668         lpPos->hwndIconTitle = 0; /* defer until needs to be shown */
 669         CONV_RECT32TO16( &wnd->rectWindow, &lpPos->rectNormal );
 670         *(UINT*)&lpPos->ptIconPos = *(UINT*)&lpPos->ptMaxPos = 0xFFFFFFFF;
 671     }
 672
 673     if( wnd->dwStyle & WS_MINIMIZE )
 674         CONV_POINT32TO16( &pt, &lpPos->ptIconPos );
 675     else if( wnd->dwStyle & WS_MAXIMIZE )
 676         CONV_POINT32TO16( &pt, &lpPos->ptMaxPos );
 677     else if( restoreRect )
 678         CONV_RECT32TO16( restoreRect, &lpPos->rectNormal );
 679
 680     return lpPos;
 681 }
 682
 683 /***********************************************************************
 684  *           WINPOS_RedrawIconTitle
 685  */
 686 BOOL WINPOS_RedrawIconTitle( HWND hWnd )
 687 {
 688     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hWnd, atomInternalPos );
 689     if( lpPos )
 690     {
 691         if( lpPos->hwndIconTitle )
 692         {
 693             SendMessageA( lpPos->hwndIconTitle, WM_SHOWWINDOW, TRUE, 0);
 694             InvalidateRect( lpPos->hwndIconTitle, NULL, TRUE );
 695             return TRUE;
 696         }
 697     }
 698     return FALSE;
 699 }
 700
 701 /***********************************************************************
 702  *           WINPOS_ShowIconTitle
 703  */
 704 BOOL WINPOS_ShowIconTitle( HWND hwnd, BOOL bShow )
 705 {
 706     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 707
 708     if( lpPos && !(GetWindowLongA( hwnd, GWL_EXSTYLE) & WS_EX_MANAGED))
 709     {
 710         HWND title = lpPos->hwndIconTitle;
 711
 712         TRACE("%p %i\n", hwnd, (bShow != 0) );
 713
 714         if( !title )
 715             lpPos->hwndIconTitle = title = ICONTITLE_Create( hwnd );
 716         if( bShow )
 717         {
 718             if (!IsWindowVisible(title))
 719             {
 720                 SendMessageA( title, WM_SHOWWINDOW, TRUE, 0 );
 721                 SetWindowPos( title, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE |
 722                               SWP_NOACTIVATE | SWP_NOZORDER | SWP_SHOWWINDOW );
 723             }
 724         }
 725         else ShowWindow( title, SW_HIDE );
 726     }
 727     return FALSE;
 728 }
 729
 730 /*******************************************************************
 731  *           WINPOS_GetMinMaxInfo
 732  *
 733  * Get the minimized and maximized information for a window.
 734  */
 735 void WINPOS_GetMinMaxInfo( HWND hwnd, POINT *maxSize, POINT *maxPos,
 736                            POINT *minTrack, POINT *maxTrack )
 737 {
 738     LPINTERNALPOS lpPos;
 739     MINMAXINFO MinMax;
 740     INT xinc, yinc;
 741     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 742     LONG exstyle = GetWindowLongA( hwnd, GWL_EXSTYLE );
 743
 744     /* Compute default values */
 745
 746     MinMax.ptMaxSize.x = GetSystemMetrics(SM_CXSCREEN);
 747     MinMax.ptMaxSize.y = GetSystemMetrics(SM_CYSCREEN);
 748     MinMax.ptMinTrackSize.x = GetSystemMetrics(SM_CXMINTRACK);
 749     MinMax.ptMinTrackSize.y = GetSystemMetrics(SM_CYMINTRACK);
 750     MinMax.ptMaxTrackSize.x = GetSystemMetrics(SM_CXSCREEN);
 751     MinMax.ptMaxTrackSize.y = GetSystemMetrics(SM_CYSCREEN);
 752
 753     if (HAS_DLGFRAME( style, exstyle ))
 754     {
 755         xinc = GetSystemMetrics(SM_CXDLGFRAME);
 756         yinc = GetSystemMetrics(SM_CYDLGFRAME);
 757     }
 758     else
 759     {
 760         xinc = yinc = 0;
 761         if (HAS_THICKFRAME(style))
 762         {
 763             xinc += GetSystemMetrics(SM_CXFRAME);
 764             yinc += GetSystemMetrics(SM_CYFRAME);
 765         }
 766         if (style & WS_BORDER)
 767         {
 768             xinc += GetSystemMetrics(SM_CXBORDER);
 769             yinc += GetSystemMetrics(SM_CYBORDER);
 770         }
 771     }
 772     MinMax.ptMaxSize.x += 2 * xinc;
 773     MinMax.ptMaxSize.y += 2 * yinc;
 774
 775     lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 776     if( lpPos && !EMPTYPOINT(lpPos->ptMaxPos) )
 777         CONV_POINT16TO32( &lpPos->ptMaxPos, &MinMax.ptMaxPosition );
 778     else
 779     {
 780         MinMax.ptMaxPosition.x = -xinc;
 781         MinMax.ptMaxPosition.y = -yinc;
 782     }
 783
 784     SendMessageA( hwnd, WM_GETMINMAXINFO, 0, (LPARAM)&MinMax );
 785
 786       /* Some sanity checks */
 787
 788     TRACE("%ld %ld / %ld %ld / %ld %ld / %ld %ld\n",
 789                       MinMax.ptMaxSize.x, MinMax.ptMaxSize.y,
 790                       MinMax.ptMaxPosition.x, MinMax.ptMaxPosition.y,
 791                       MinMax.ptMaxTrackSize.x, MinMax.ptMaxTrackSize.y,
 792                       MinMax.ptMinTrackSize.x, MinMax.ptMinTrackSize.y);
 793     MinMax.ptMaxTrackSize.x = max( MinMax.ptMaxTrackSize.x,
 794                                    MinMax.ptMinTrackSize.x );
 795     MinMax.ptMaxTrackSize.y = max( MinMax.ptMaxTrackSize.y,
 796                                    MinMax.ptMinTrackSize.y );
 797
 798     if (maxSize) *maxSize = MinMax.ptMaxSize;
 799     if (maxPos) *maxPos = MinMax.ptMaxPosition;
 800     if (minTrack) *minTrack = MinMax.ptMinTrackSize;
 801     if (maxTrack) *maxTrack = MinMax.ptMaxTrackSize;
 802 }
 803
 804 /***********************************************************************
 805  *              ShowWindowAsync (USER32.@)
 806  *
 807  * doesn't wait; returns immediately.
 808  * used by threads to toggle windows in other (possibly hanging) threads
 809  */
 810 BOOL WINAPI ShowWindowAsync( HWND hwnd, INT cmd )
 811 {
 812     HWND full_handle;
 813
 814     if (is_broadcast(hwnd))
 815     {
 816         SetLastError( ERROR_INVALID_PARAMETER );
 817         return FALSE;
 818     }
 819
 820     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 821         return USER_Driver.pShowWindow( full_handle, cmd );
 822     return SendNotifyMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 823 }
 824
 825
 826 /***********************************************************************
 827  *              ShowWindow (USER32.@)
 828  */
 829 BOOL WINAPI ShowWindow( HWND hwnd, INT cmd )
 830 {
 831     HWND full_handle;
 832
 833     if (is_broadcast(hwnd))
 834     {
 835         SetLastError( ERROR_INVALID_PARAMETER );
 836         return FALSE;
 837     }
 838     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 839     {
 840         if (USER_Driver.pShowWindow)
 841             return USER_Driver.pShowWindow( full_handle, cmd );
 842         return FALSE;
 843     }
 844     return SendMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 845 }
 846
 847
 848 /***********************************************************************
 849  *              GetInternalWindowPos (USER32.@)
 850  */
 851 UINT WINAPI GetInternalWindowPos( HWND hwnd, LPRECT rectWnd,
 852                                       LPPOINT ptIcon )
 853 {
 854     WINDOWPLACEMENT wndpl;
 855     if (GetWindowPlacement( hwnd, &wndpl ))
 856     {
 857         if (rectWnd) *rectWnd = wndpl.rcNormalPosition;
 858         if (ptIcon)  *ptIcon = wndpl.ptMinPosition;
 859         return wndpl.showCmd;
 860     }
 861     return 0;
 862 }
 863
 864
 865 /***********************************************************************
 866  *              GetWindowPlacement (USER32.@)
 867  *
 868  * Win95:
 869  * Fails if wndpl->length of Win95 (!) apps is invalid.
 870  */
 871 BOOL WINAPI GetWindowPlacement( HWND hwnd, WINDOWPLACEMENT *wndpl )
 872 {
 873     WND *pWnd = WIN_FindWndPtr( hwnd );
 874     LPINTERNALPOS lpPos;
 875
 876     if(!pWnd ) return FALSE;
 877
 878     lpPos = WINPOS_InitInternalPos( pWnd, *(LPPOINT)&pWnd->rectWindow.left, &pWnd->rectWindow );
 879     wndpl->length  = sizeof(*wndpl);
 880     if( pWnd->dwStyle & WS_MINIMIZE )
 881         wndpl->showCmd = SW_SHOWMINIMIZED;
 882     else
 883         wndpl->showCmd = ( pWnd->dwStyle & WS_MAXIMIZE ) ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL ;
 884     if( pWnd->flags & WIN_RESTORE_MAX )
 885         wndpl->flags = WPF_RESTORETOMAXIMIZED;
 886     else
 887         wndpl->flags = 0;
 888     CONV_POINT16TO32( &lpPos->ptIconPos, &wndpl->ptMinPosition );
 889     CONV_POINT16TO32( &lpPos->ptMaxPos, &wndpl->ptMaxPosition );
 890     CONV_RECT16TO32( &lpPos->rectNormal, &wndpl->rcNormalPosition );
 891     WIN_ReleaseWndPtr(pWnd);
 892     return TRUE;
 893 }
 894
 895
 896 /***********************************************************************
 897  *           WINPOS_SetPlacement
 898  */
 899 static BOOL WINPOS_SetPlacement( HWND hwnd, const WINDOWPLACEMENT *wndpl, UINT flags )
 900 {
 901     WND *pWnd = WIN_FindWndPtr( hwnd );
 902     if( pWnd )
 903     {
 904         LPINTERNALPOS lpPos = (LPINTERNALPOS)WINPOS_InitInternalPos( pWnd,
 905                              *(LPPOINT)&pWnd->rectWindow.left, &pWnd->rectWindow );
 906
 907         if( flags & PLACE_MIN ) CONV_POINT32TO16( &wndpl->ptMinPosition, &lpPos->ptIconPos );
 908         if( flags & PLACE_MAX ) CONV_POINT32TO16( &wndpl->ptMaxPosition, &lpPos->ptMaxPos );
 909         if( flags & PLACE_RECT) CONV_RECT32TO16( &wndpl->rcNormalPosition, &lpPos->rectNormal );
 910
 911         if( pWnd->dwStyle & WS_MINIMIZE )
 912         {
 913             WINPOS_ShowIconTitle( pWnd->hwndSelf, FALSE );
 914             if( wndpl->flags & WPF_SETMINPOSITION && !EMPTYPOINT(lpPos->ptIconPos))
 915                 SetWindowPos( hwnd, 0, lpPos->ptIconPos.x, lpPos->ptIconPos.y,
 916                                 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 917         }
 918         else if( pWnd->dwStyle & WS_MAXIMIZE )
 919         {
 920             if( !EMPTYPOINT(lpPos->ptMaxPos) )
 921                 SetWindowPos( hwnd, 0, lpPos->ptMaxPos.x, lpPos->ptMaxPos.y,
 922                                 0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 923         }
 924         else if( flags & PLACE_RECT )
 925                 SetWindowPos( hwnd, 0, lpPos->rectNormal.left, lpPos->rectNormal.top,
 926                                 lpPos->rectNormal.right - lpPos->rectNormal.left,
 927                                 lpPos->rectNormal.bottom - lpPos->rectNormal.top,
 928                                 SWP_NOZORDER | SWP_NOACTIVATE );
 929
 930         ShowWindow( hwnd, wndpl->showCmd );
 931         if( IsWindow(hwnd) && pWnd->dwStyle & WS_MINIMIZE )
 932         {
 933             if( pWnd->dwStyle & WS_VISIBLE ) WINPOS_ShowIconTitle( pWnd->hwndSelf, TRUE );
 934
 935             /* SDK: ...valid only the next time... */
 936             if( wndpl->flags & WPF_RESTORETOMAXIMIZED ) pWnd->flags |= WIN_RESTORE_MAX;
 937         }
 938         WIN_ReleaseWndPtr(pWnd);
 939         return TRUE;
 940     }
 941     return FALSE;
 942 }
 943
 944
 945 /***********************************************************************
 946  *              SetWindowPlacement (USER32.@)
 947  *
 948  * Win95:
 949  * Fails if wndpl->length of Win95 (!) apps is invalid.
 950  */
 951 BOOL WINAPI SetWindowPlacement( HWND hwnd, const WINDOWPLACEMENT *wpl )
 952 {
 953     if (!wpl) return FALSE;
 954     return WINPOS_SetPlacement( hwnd, wpl, PLACE_MIN | PLACE_MAX | PLACE_RECT );
 955 }
 956
 957
 958 /***********************************************************************
 959  *              AnimateWindow (USER32.@)
 960  *              Shows/Hides a window with an animation
 961  *              NO ANIMATION YET
 962  */
 963 BOOL WINAPI AnimateWindow(HWND hwnd, DWORD dwTime, DWORD dwFlags)
 964 {
 965         FIXME("partial stub\n");
 966
 967         /* If trying to show/hide and it's already   *
 968          * shown/hidden or invalid window, fail with *
 969          * invalid parameter                         */
 970         if(!IsWindow(hwnd) ||
 971            (IsWindowVisible(hwnd) && !(dwFlags & AW_HIDE)) ||
 972            (!IsWindowVisible(hwnd) && (dwFlags & AW_HIDE)))
 973         {
 974                 SetLastError(ERROR_INVALID_PARAMETER);
 975                 return FALSE;
 976         }
 977
 978         ShowWindow(hwnd, (dwFlags & AW_HIDE) ? SW_HIDE : ((dwFlags & AW_ACTIVATE) ? SW_SHOW : SW_SHOWNA));
 979
 980         return TRUE;
 981 }
 982
 983 /***********************************************************************
 984  *              SetInternalWindowPos (USER32.@)
 985  */
 986 void WINAPI SetInternalWindowPos( HWND hwnd, UINT showCmd,
 987                                     LPRECT rect, LPPOINT pt )
 988 {
 989     if( IsWindow(hwnd) )
 990     {
 991         WINDOWPLACEMENT wndpl;
 992         UINT flags;
 993
 994         wndpl.length  = sizeof(wndpl);
 995         wndpl.showCmd = showCmd;
 996         wndpl.flags = flags = 0;
 997
 998         if( pt )
 999         {
1000             flags |= PLACE_MIN;
1001             wndpl.flags |= WPF_SETMINPOSITION;
1002             wndpl.ptMinPosition = *pt;
1003         }
1004         if( rect )
1005         {
1006             flags |= PLACE_RECT;
1007             wndpl.rcNormalPosition = *rect;
1008         }
1009         WINPOS_SetPlacement( hwnd, &wndpl, flags );
1010     }
1011 }
1012
1013
1014 /*******************************************************************
1015  *         can_activate_window
1016  *
1017  * Check if we can activate the specified window.
1018  */
1019 static BOOL can_activate_window( HWND hwnd )
1020 {
1021     LONG style;
1022
1023     if (!hwnd) return FALSE;
1024     style = GetWindowLongW( hwnd, GWL_STYLE );
1025     if (!(style & WS_VISIBLE)) return FALSE;
1026     if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return FALSE;
1027     return !(style & WS_DISABLED);
1028 }
1029
1030
1031 /*******************************************************************
1032  *         WINPOS_ActivateOtherWindow
1033  *
1034  *  Activates window other than pWnd.
1035  */
1036 void WINPOS_ActivateOtherWindow(HWND hwnd)
1037 {
1038     HWND hwndTo, fg;
1039
1040     if ((GetWindowLongW( hwnd, GWL_STYLE ) & WS_POPUP) && (hwndTo = GetWindow( hwnd, GW_OWNER )))
1041     {
1042         hwndTo = GetAncestor( hwndTo, GA_ROOT );
1043         if (can_activate_window( hwndTo )) goto done;
1044     }
1045
1046     hwndTo = hwnd;
1047     for (;;)
1048     {
1049         if (!(hwndTo = GetWindow( hwndTo, GW_HWNDNEXT ))) break;
1050         if (can_activate_window( hwndTo )) break;
1051     }
1052
1053  done:
1054     fg = GetForegroundWindow();
1055     TRACE("win = %p fg = %p\n", hwndTo, fg);
1056     if (!fg || (hwnd == fg))
1057     {
1058         if (SetForegroundWindow( hwndTo )) return;
1059     }
1060     if (!SetActiveWindow( hwndTo )) SetActiveWindow(0);
1061 }
1062
1063
1064 /***********************************************************************
1065  *           WINPOS_HandleWindowPosChanging16
1066  *
1067  * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
1068  */
1069 LONG WINPOS_HandleWindowPosChanging16( HWND hwnd, WINDOWPOS16 *winpos )
1070 {
1071     POINT maxSize, minTrack;
1072     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
1073
1074     if (winpos->flags & SWP_NOSIZE) return 0;
1075     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
1076     {
1077         WINPOS_GetMinMaxInfo( hwnd, &maxSize, NULL, &minTrack, NULL );
1078         if (maxSize.x < winpos->cx) winpos->cx = maxSize.x;
1079         if (maxSize.y < winpos->cy) winpos->cy = maxSize.y;
1080         if (!(style & WS_MINIMIZE))
1081         {
1082             if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
1083             if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
1084         }
1085     }
1086     return 0;
1087 }
1088
1089
1090 /***********************************************************************
1091  *           WINPOS_HandleWindowPosChanging
1092  *
1093  * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
1094  */
1095 LONG WINPOS_HandleWindowPosChanging( HWND hwnd, WINDOWPOS *winpos )
1096 {
1097     POINT maxSize, minTrack;
1098     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
1099
1100     if (winpos->flags & SWP_NOSIZE) return 0;
1101     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
1102     {
1103         WINPOS_GetMinMaxInfo( hwnd, &maxSize, NULL, &minTrack, NULL );
1104         winpos->cx = min( winpos->cx, maxSize.x );
1105         winpos->cy = min( winpos->cy, maxSize.y );
1106         if (!(style & WS_MINIMIZE))
1107         {
1108             if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
1109             if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
1110         }
1111     }
1112     return 0;
1113 }
1114
1115
1116 /***********************************************************************
1117  *           dump_winpos_flags
1118  */
1119 static void dump_winpos_flags(UINT flags)
1120 {
1121     TRACE("flags:");
1122     if(flags & SWP_NOSIZE) TRACE(" SWP_NOSIZE");
1123     if(flags & SWP_NOMOVE) TRACE(" SWP_NOMOVE");
1124     if(flags & SWP_NOZORDER) TRACE(" SWP_NOZORDER");
1125     if(flags & SWP_NOREDRAW) TRACE(" SWP_NOREDRAW");
1126     if(flags & SWP_NOACTIVATE) TRACE(" SWP_NOACTIVATE");
1127     if(flags & SWP_FRAMECHANGED) TRACE(" SWP_FRAMECHANGED");
1128     if(flags & SWP_SHOWWINDOW) TRACE(" SWP_SHOWWINDOW");
1129     if(flags & SWP_HIDEWINDOW) TRACE(" SWP_HIDEWINDOW");
1130     if(flags & SWP_NOCOPYBITS) TRACE(" SWP_NOCOPYBITS");
1131     if(flags & SWP_NOOWNERZORDER) TRACE(" SWP_NOOWNERZORDER");
1132     if(flags & SWP_NOSENDCHANGING) TRACE(" SWP_NOSENDCHANGING");
1133     if(flags & SWP_DEFERERASE) TRACE(" SWP_DEFERERASE");
1134     if(flags & SWP_ASYNCWINDOWPOS) TRACE(" SWP_ASYNCWINDOWPOS");
1135
1136 #define DUMPED_FLAGS \
1137     (SWP_NOSIZE | \
1138     SWP_NOMOVE | \
1139     SWP_NOZORDER | \
1140     SWP_NOREDRAW | \
1141     SWP_NOACTIVATE | \
1142     SWP_FRAMECHANGED | \
1143     SWP_SHOWWINDOW | \
1144     SWP_HIDEWINDOW | \
1145     SWP_NOCOPYBITS | \
1146     SWP_NOOWNERZORDER | \
1147     SWP_NOSENDCHANGING | \
1148     SWP_DEFERERASE | \
1149     SWP_ASYNCWINDOWPOS)
1150
1151     if(flags & ~DUMPED_FLAGS) TRACE(" %08x", flags & ~DUMPED_FLAGS);
1152     TRACE("\n");
1153 #undef DUMPED_FLAGS
1154 }
1155
1156 /***********************************************************************
1157  *              SetWindowPos (USER32.@)
1158  */
1159 BOOL WINAPI SetWindowPos( HWND hwnd, HWND hwndInsertAfter,
1160                           INT x, INT y, INT cx, INT cy, UINT flags )
1161 {
1162     WINDOWPOS winpos;
1163
1164     TRACE("hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1165           hwnd, hwndInsertAfter, x, y, cx, cy, flags);
1166     if(TRACE_ON(win)) dump_winpos_flags(flags);
1167
1168     if (is_broadcast(hwnd))
1169     {
1170         SetLastError( ERROR_INVALID_PARAMETER );
1171         return FALSE;
1172     }
1173
1174     winpos.hwnd = WIN_GetFullHandle(hwnd);
1175     winpos.hwndInsertAfter = WIN_GetFullHandle(hwndInsertAfter);
1176     winpos.x = x;
1177     winpos.y = y;
1178     winpos.cx = cx;
1179     winpos.cy = cy;
1180     winpos.flags = flags;
1181     if (WIN_IsCurrentThread( hwnd )) return USER_Driver.pSetWindowPos( &winpos );
1182     return SendMessageW( winpos.hwnd, WM_WINE_SETWINDOWPOS, 0, (LPARAM)&winpos );
1183 }
1184
1185
1186 /***********************************************************************
1187  *              BeginDeferWindowPos (USER32.@)
1188  */
1189 HDWP WINAPI BeginDeferWindowPos( INT count )
1190 {
1191     HDWP handle;
1192     DWP *pDWP;
1193
1194     if (count < 0)
1195     {
1196         SetLastError(ERROR_INVALID_PARAMETER);
1197         return 0;
1198     }
1199     /* Windows allows zero count, in which case it allocates context for 8 moves */
1200     if (count == 0) count = 8;
1201
1202     handle = USER_HEAP_ALLOC( sizeof(DWP) + (count-1)*sizeof(WINDOWPOS) );
1203     if (!handle) return 0;
1204     pDWP = (DWP *) USER_HEAP_LIN_ADDR( handle );
1205     pDWP->actualCount    = 0;
1206     pDWP->suggestedCount = count;
1207     pDWP->valid          = TRUE;
1208     pDWP->wMagic         = DWP_MAGIC;
1209     pDWP->hwndParent     = 0;
1210     return handle;
1211 }
1212
1213
1214 /***********************************************************************
1215  *              DeferWindowPos (USER32.@)
1216  */
1217 HDWP WINAPI DeferWindowPos( HDWP hdwp, HWND hwnd, HWND hwndAfter,
1218                                 INT x, INT y, INT cx, INT cy,
1219                                 UINT flags )
1220 {
1221     DWP *pDWP;
1222     int i;
1223     HDWP newhdwp = hdwp,retvalue;
1224
1225     hwnd = WIN_GetFullHandle( hwnd );
1226     if (hwnd == GetDesktopWindow()) return 0;
1227
1228     if (!(pDWP = USER_HEAP_LIN_ADDR( hdwp ))) return 0;
1229
1230     USER_Lock();
1231
1232     for (i = 0; i < pDWP->actualCount; i++)
1233     {
1234         if (pDWP->winPos[i].hwnd == hwnd)
1235         {
1236               /* Merge with the other changes */
1237             if (!(flags & SWP_NOZORDER))
1238             {
1239                 pDWP->winPos[i].hwndInsertAfter = WIN_GetFullHandle(hwndAfter);
1240             }
1241             if (!(flags & SWP_NOMOVE))
1242             {
1243                 pDWP->winPos[i].x = x;
1244                 pDWP->winPos[i].y = y;
1245             }
1246             if (!(flags & SWP_NOSIZE))
1247             {
1248                 pDWP->winPos[i].cx = cx;
1249                 pDWP->winPos[i].cy = cy;
1250             }
1251             pDWP->winPos[i].flags &= flags | ~(SWP_NOSIZE | SWP_NOMOVE |
1252                                                SWP_NOZORDER | SWP_NOREDRAW |
1253                                                SWP_NOACTIVATE | SWP_NOCOPYBITS|
1254                                                SWP_NOOWNERZORDER);
1255             pDWP->winPos[i].flags |= flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW |
1256                                               SWP_FRAMECHANGED);
1257             retvalue = hdwp;
1258             goto END;
1259         }
1260     }
1261     if (pDWP->actualCount >= pDWP->suggestedCount)
1262     {
1263         newhdwp = USER_HEAP_REALLOC( hdwp,
1264                       sizeof(DWP) + pDWP->suggestedCount*sizeof(WINDOWPOS) );
1265         if (!newhdwp)
1266         {
1267             retvalue = 0;
1268             goto END;
1269         }
1270         pDWP = (DWP *) USER_HEAP_LIN_ADDR( newhdwp );
1271         pDWP->suggestedCount++;
1272     }
1273     pDWP->winPos[pDWP->actualCount].hwnd = hwnd;
1274     pDWP->winPos[pDWP->actualCount].hwndInsertAfter = hwndAfter;
1275     pDWP->winPos[pDWP->actualCount].x = x;
1276     pDWP->winPos[pDWP->actualCount].y = y;
1277     pDWP->winPos[pDWP->actualCount].cx = cx;
1278     pDWP->winPos[pDWP->actualCount].cy = cy;
1279     pDWP->winPos[pDWP->actualCount].flags = flags;
1280     pDWP->actualCount++;
1281     retvalue = newhdwp;
1282 END:
1283     USER_Unlock();
1284     return retvalue;
1285 }
1286
1287
1288 /***********************************************************************
1289  *              EndDeferWindowPos (USER32.@)
1290  */
1291 BOOL WINAPI EndDeferWindowPos( HDWP hdwp )
1292 {
1293     DWP *pDWP;
1294     WINDOWPOS *winpos;
1295     BOOL res = TRUE;
1296     int i;
1297
1298     pDWP = (DWP *) USER_HEAP_LIN_ADDR( hdwp );
1299     if (!pDWP) return FALSE;
1300     for (i = 0, winpos = pDWP->winPos; i < pDWP->actualCount; i++, winpos++)
1301     {
1302         if (!(res = USER_Driver.pSetWindowPos( winpos ))) break;
1303     }
1304     USER_HEAP_FREE( hdwp );
1305     return res;
1306 }
1307
1308
1309 /***********************************************************************
1310  *              TileChildWindows (USER.199)
1311  */
1312 void WINAPI TileChildWindows16( HWND16 parent, WORD action )
1313 {
1314     FIXME("(%04x, %d): stub\n", parent, action);
1315 }
1316
1317 /***********************************************************************
1318  *              CascadeChildWindows (USER.198)
1319  */
1320 void WINAPI CascadeChildWindows16( HWND16 parent, WORD action )
1321 {
1322     FIXME("(%04x, %d): stub\n", parent, action);
1323 }