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 "ntstatus.h"
  33 #include "wine/winuser16.h"
  34 #include "wine/server.h"
  35 #include "controls.h"
  36 #include "user_private.h"
  37 #include "win.h"
  38 #include "message.h"
  39 #include "winpos.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 typedef struct
  72 {
  73     RECT16   rectNormal;
  74     POINT16  ptIconPos;
  75     POINT16  ptMaxPos;
  76     HWND     hwndIconTitle;
  77 } INTERNALPOS, *LPINTERNALPOS;
  78
  79 /* ----- internal variables ----- */
  80
  81 static LPCSTR atomInternalPos;
  82
  83
  84 /***********************************************************************
  85  *           WINPOS_CreateInternalPosAtom
  86  */
  87 BOOL WINPOS_CreateInternalPosAtom()
  88 {
  89     LPCSTR str = "SysIP";
  90     atomInternalPos = (LPCSTR)(DWORD)GlobalAddAtomA(str);
  91     return (atomInternalPos) ? TRUE : FALSE;
  92 }
  93
  94 /***********************************************************************
  95  *           WINPOS_CheckInternalPos
  96  *
  97  * Called when a window is destroyed.
  98  */
  99 void WINPOS_CheckInternalPos( HWND hwnd )
 100 {
 101     LPINTERNALPOS lpPos = (LPINTERNALPOS) GetPropA( hwnd, atomInternalPos );
 102
 103     if( lpPos )
 104     {
 105         if( IsWindow(lpPos->hwndIconTitle) )
 106             DestroyWindow( lpPos->hwndIconTitle );
 107         HeapFree( GetProcessHeap(), 0, lpPos );
 108     }
 109 }
 110
 111 /***********************************************************************
 112  *              ArrangeIconicWindows (USER32.@)
 113  */
 114 UINT WINAPI ArrangeIconicWindows( HWND parent )
 115 {
 116     RECT rectParent;
 117     HWND hwndChild;
 118     INT x, y, xspacing, yspacing;
 119
 120     GetClientRect( parent, &rectParent );
 121     x = rectParent.left;
 122     y = rectParent.bottom;
 123     xspacing = GetSystemMetrics(SM_CXICONSPACING);
 124     yspacing = GetSystemMetrics(SM_CYICONSPACING);
 125
 126     hwndChild = GetWindow( parent, GW_CHILD );
 127     while (hwndChild)
 128     {
 129         if( IsIconic( hwndChild ) )
 130         {
 131             WINPOS_ShowIconTitle( hwndChild, FALSE );
 132
 133             SetWindowPos( hwndChild, 0, x + (xspacing - GetSystemMetrics(SM_CXICON)) / 2,
 134                             y - yspacing - GetSystemMetrics(SM_CYICON)/2, 0, 0,
 135                             SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 136             if( IsWindow(hwndChild) )
 137                 WINPOS_ShowIconTitle(hwndChild , TRUE );
 138
 139             if (x <= rectParent.right - xspacing) x += xspacing;
 140             else
 141             {
 142                 x = rectParent.left;
 143                 y -= yspacing;
 144             }
 145         }
 146         hwndChild = GetWindow( hwndChild, GW_HWNDNEXT );
 147     }
 148     return yspacing;
 149 }
 150
 151
 152 /***********************************************************************
 153  *              SwitchToThisWindow (USER32.@)
 154  */
 155 void WINAPI SwitchToThisWindow( HWND hwnd, BOOL restore )
 156 {
 157     ShowWindow( hwnd, restore ? SW_RESTORE : SW_SHOWMINIMIZED );
 158 }
 159
 160
 161 /***********************************************************************
 162  *              GetWindowRect (USER32.@)
 163  */
 164 BOOL WINAPI GetWindowRect( HWND hwnd, LPRECT rect )
 165 {
 166     BOOL ret = WIN_GetRectangles( hwnd, rect, NULL );
 167     if (ret)
 168     {
 169         MapWindowPoints( GetAncestor( hwnd, GA_PARENT ), 0, (POINT *)rect, 2 );
 170         TRACE( "hwnd %p (%ld,%ld)-(%ld,%ld)\n",
 171                hwnd, rect->left, rect->top, rect->right, rect->bottom);
 172     }
 173     return ret;
 174 }
 175
 176
 177 /***********************************************************************
 178  *              GetWindowRgn (USER32.@)
 179  */
 180 int WINAPI GetWindowRgn ( HWND hwnd, HRGN hrgn )
 181 {
 182     int nRet = ERROR;
 183     NTSTATUS status;
 184     HRGN win_rgn = 0;
 185     RGNDATA *data;
 186     size_t size = 256;
 187
 188     do
 189     {
 190         if (!(data = HeapAlloc( GetProcessHeap(), 0, sizeof(*data) + size - 1 )))
 191         {
 192             SetLastError( ERROR_OUTOFMEMORY );
 193             return ERROR;
 194         }
 195         SERVER_START_REQ( get_window_region )
 196         {
 197             req->window = hwnd;
 198             wine_server_set_reply( req, data->Buffer, size );
 199             if (!(status = wine_server_call( req )))
 200             {
 201                 size_t reply_size = wine_server_reply_size( reply );
 202                 if (reply_size)
 203                 {
 204                     data->rdh.dwSize   = sizeof(data->rdh);
 205                     data->rdh.iType    = RDH_RECTANGLES;
 206                     data->rdh.nCount   = reply_size / sizeof(RECT);
 207                     data->rdh.nRgnSize = reply_size;
 208                     win_rgn = ExtCreateRegion( NULL, size, data );
 209                 }
 210             }
 211             else size = reply->total_size;
 212         }
 213         SERVER_END_REQ;
 214         HeapFree( GetProcessHeap(), 0, data );
 215     } while (status == STATUS_BUFFER_OVERFLOW);
 216
 217     if (status) SetLastError( RtlNtStatusToDosError(status) );
 218     else if (win_rgn)
 219     {
 220         nRet = CombineRgn( hrgn, win_rgn, 0, RGN_COPY );
 221         DeleteObject( win_rgn );
 222     }
 223     return nRet;
 224 }
 225
 226
 227 /***********************************************************************
 228  *              SetWindowRgn (USER32.@)
 229  */
 230 int WINAPI SetWindowRgn( HWND hwnd, HRGN hrgn, BOOL bRedraw )
 231 {
 232     static const RECT empty_rect;
 233     BOOL ret;
 234
 235     if (hrgn)
 236     {
 237         RGNDATA *data;
 238         DWORD size;
 239
 240         if (!(size = GetRegionData( hrgn, 0, NULL ))) return FALSE;
 241         if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE;
 242         if (!GetRegionData( hrgn, size, data ))
 243         {
 244             HeapFree( GetProcessHeap(), 0, data );
 245             return FALSE;
 246         }
 247         SERVER_START_REQ( set_window_region )
 248         {
 249             req->window = hwnd;
 250             if (data->rdh.nCount)
 251                 wine_server_add_data( req, data->Buffer, data->rdh.nCount * sizeof(RECT) );
 252             else
 253                 wine_server_add_data( req, &empty_rect, sizeof(empty_rect) );
 254             ret = !wine_server_call_err( req );
 255         }
 256         SERVER_END_REQ;
 257     }
 258     else  /* clear existing region */
 259     {
 260         SERVER_START_REQ( set_window_region )
 261         {
 262             req->window = hwnd;
 263             ret = !wine_server_call_err( req );
 264         }
 265         SERVER_END_REQ;
 266     }
 267
 268     if (ret && USER_Driver.pSetWindowRgn)
 269         ret = USER_Driver.pSetWindowRgn( hwnd, hrgn, bRedraw );
 270
 271     if (ret && bRedraw) RedrawWindow( hwnd, NULL, 0, RDW_FRAME | RDW_INVALIDATE | RDW_ERASE );
 272     return ret;
 273 }
 274
 275
 276 /***********************************************************************
 277  *              GetClientRect (USER32.@)
 278  */
 279 BOOL WINAPI GetClientRect( HWND hwnd, LPRECT rect )
 280 {
 281     BOOL ret;
 282
 283     if ((ret = WIN_GetRectangles( hwnd, NULL, rect )))
 284     {
 285         rect->right -= rect->left;
 286         rect->bottom -= rect->top;
 287         rect->left = rect->top = 0;
 288     }
 289     return ret;
 290 }
 291
 292
 293 /*******************************************************************
 294  *              ClientToScreen (USER32.@)
 295  */
 296 BOOL WINAPI ClientToScreen( HWND hwnd, LPPOINT lppnt )
 297 {
 298     MapWindowPoints( hwnd, 0, lppnt, 1 );
 299     return TRUE;
 300 }
 301
 302
 303 /*******************************************************************
 304  *              ScreenToClient (USER32.@)
 305  */
 306 BOOL WINAPI ScreenToClient( HWND hwnd, LPPOINT lppnt )
 307 {
 308     MapWindowPoints( 0, hwnd, lppnt, 1 );
 309     return TRUE;
 310 }
 311
 312
 313 /***********************************************************************
 314  *           list_children_from_point
 315  *
 316  * Get the list of children that can contain point from the server.
 317  * Point is in screen coordinates.
 318  * Returned list must be freed by caller.
 319  */
 320 static HWND *list_children_from_point( HWND hwnd, POINT pt )
 321 {
 322     HWND *list;
 323     int size = 32;
 324
 325     for (;;)
 326     {
 327         int count = 0;
 328
 329         if (!(list = HeapAlloc( GetProcessHeap(), 0, size * sizeof(HWND) ))) break;
 330
 331         SERVER_START_REQ( get_window_children_from_point )
 332         {
 333             req->parent = hwnd;
 334             req->x = pt.x;
 335             req->y = pt.y;
 336             wine_server_set_reply( req, list, (size-1) * sizeof(HWND) );
 337             if (!wine_server_call( req )) count = reply->count;
 338         }
 339         SERVER_END_REQ;
 340         if (count && count < size)
 341         {
 342             list[count] = 0;
 343             return list;
 344         }
 345         HeapFree( GetProcessHeap(), 0, list );
 346         if (!count) break;
 347         size = count + 1;  /* restart with a large enough buffer */
 348     }
 349     return NULL;
 350 }
 351
 352
 353 /***********************************************************************
 354  *           WINPOS_WindowFromPoint
 355  *
 356  * Find the window and hittest for a given point.
 357  */
 358 HWND WINPOS_WindowFromPoint( HWND hwndScope, POINT pt, INT *hittest )
 359 {
 360     int i, res;
 361     HWND ret, *list;
 362
 363     if (!hwndScope) hwndScope = GetDesktopWindow();
 364
 365     *hittest = HTNOWHERE;
 366
 367     if (!(list = list_children_from_point( hwndScope, pt ))) return 0;
 368
 369     /* now determine the hittest */
 370
 371     for (i = 0; list[i]; i++)
 372     {
 373         LONG style = GetWindowLongW( list[i], GWL_STYLE );
 374
 375         /* If window is minimized or disabled, return at once */
 376         if (style & WS_MINIMIZE)
 377         {
 378             *hittest = HTCAPTION;
 379             break;
 380         }
 381         if (style & WS_DISABLED)
 382         {
 383             *hittest = HTERROR;
 384             break;
 385         }
 386         /* Send WM_NCCHITTEST (if same thread) */
 387         if (!WIN_IsCurrentThread( list[i] ))
 388         {
 389             *hittest = HTCLIENT;
 390             break;
 391         }
 392         res = SendMessageA( list[i], WM_NCHITTEST, 0, MAKELONG(pt.x,pt.y) );
 393         if (res != HTTRANSPARENT)
 394         {
 395             *hittest = res;  /* Found the window */
 396             break;
 397         }
 398         /* continue search with next window in z-order */
 399     }
 400     ret = list[i];
 401     HeapFree( GetProcessHeap(), 0, list );
 402     TRACE( "scope %p (%ld,%ld) returning %p\n", hwndScope, pt.x, pt.y, ret );
 403     return ret;
 404 }
 405
 406
 407 /*******************************************************************
 408  *              WindowFromPoint (USER32.@)
 409  */
 410 HWND WINAPI WindowFromPoint( POINT pt )
 411 {
 412     INT hittest;
 413     return WINPOS_WindowFromPoint( 0, pt, &hittest );
 414 }
 415
 416
 417 /*******************************************************************
 418  *              ChildWindowFromPoint (USER32.@)
 419  */
 420 HWND WINAPI ChildWindowFromPoint( HWND hwndParent, POINT pt )
 421 {
 422     return ChildWindowFromPointEx( hwndParent, pt, CWP_ALL );
 423 }
 424
 425 /*******************************************************************
 426  *              ChildWindowFromPointEx (USER32.@)
 427  */
 428 HWND WINAPI ChildWindowFromPointEx( HWND hwndParent, POINT pt, UINT uFlags)
 429 {
 430     /* pt is in the client coordinates */
 431     HWND *list;
 432     int i;
 433     RECT rect;
 434     HWND retvalue;
 435
 436     GetClientRect( hwndParent, &rect );
 437     if (!PtInRect( &rect, pt )) return 0;
 438     if (!(list = WIN_ListChildren( hwndParent ))) return hwndParent;
 439
 440     for (i = 0; list[i]; i++)
 441     {
 442         if (!WIN_GetRectangles( list[i], &rect, NULL )) continue;
 443         if (!PtInRect( &rect, pt )) continue;
 444         if (uFlags & (CWP_SKIPINVISIBLE|CWP_SKIPDISABLED))
 445         {
 446             LONG style = GetWindowLongW( list[i], GWL_STYLE );
 447             if ((uFlags & CWP_SKIPINVISIBLE) && !(style & WS_VISIBLE)) continue;
 448             if ((uFlags & CWP_SKIPDISABLED) && (style & WS_DISABLED)) continue;
 449         }
 450         if (uFlags & CWP_SKIPTRANSPARENT)
 451         {
 452             if (GetWindowLongW( list[i], GWL_EXSTYLE ) & WS_EX_TRANSPARENT) continue;
 453         }
 454         break;
 455     }
 456     retvalue = list[i];
 457     HeapFree( GetProcessHeap(), 0, list );
 458     if (!retvalue) retvalue = hwndParent;
 459     return retvalue;
 460 }
 461
 462
 463 /*******************************************************************
 464  *         WINPOS_GetWinOffset
 465  *
 466  * Calculate the offset between the origin of the two windows. Used
 467  * to implement MapWindowPoints.
 468  */
 469 static void WINPOS_GetWinOffset( HWND hwndFrom, HWND hwndTo, POINT *offset )
 470 {
 471     WND * wndPtr;
 472
 473     offset->x = offset->y = 0;
 474
 475     /* Translate source window origin to screen coords */
 476     if (hwndFrom)
 477     {
 478         HWND hwnd = hwndFrom;
 479
 480         while (hwnd)
 481         {
 482             if (hwnd == hwndTo) return;
 483             if (!(wndPtr = WIN_GetPtr( hwnd )))
 484             {
 485                 ERR( "bad hwndFrom = %p\n", hwnd );
 486                 return;
 487             }
 488             if (wndPtr == WND_DESKTOP) break;
 489             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 490             offset->x += wndPtr->rectClient.left;
 491             offset->y += wndPtr->rectClient.top;
 492             hwnd = wndPtr->parent;
 493             WIN_ReleasePtr( wndPtr );
 494         }
 495     }
 496
 497     /* Translate origin to destination window coords */
 498     if (hwndTo)
 499     {
 500         HWND hwnd = hwndTo;
 501
 502         while (hwnd)
 503         {
 504             if (!(wndPtr = WIN_GetPtr( hwnd )))
 505             {
 506                 ERR( "bad hwndTo = %p\n", hwnd );
 507                 return;
 508             }
 509             if (wndPtr == WND_DESKTOP) break;
 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     return;
 518
 519  other_process:  /* one of the parents may belong to another process, do it the hard way */
 520     offset->x = offset->y = 0;
 521     SERVER_START_REQ( get_windows_offset )
 522     {
 523         req->from = hwndFrom;
 524         req->to   = hwndTo;
 525         if (!wine_server_call( req ))
 526         {
 527             offset->x = reply->x;
 528             offset->y = reply->y;
 529         }
 530     }
 531     SERVER_END_REQ;
 532 }
 533
 534
 535 /*******************************************************************
 536  *              MapWindowPoints (USER.258)
 537  */
 538 void WINAPI MapWindowPoints16( HWND16 hwndFrom, HWND16 hwndTo,
 539                                LPPOINT16 lppt, UINT16 count )
 540 {
 541     POINT offset;
 542
 543     WINPOS_GetWinOffset( WIN_Handle32(hwndFrom), WIN_Handle32(hwndTo), &offset );
 544     while (count--)
 545     {
 546         lppt->x += offset.x;
 547         lppt->y += offset.y;
 548         lppt++;
 549     }
 550 }
 551
 552
 553 /*******************************************************************
 554  *              MapWindowPoints (USER32.@)
 555  */
 556 INT WINAPI MapWindowPoints( HWND hwndFrom, HWND hwndTo, LPPOINT lppt, UINT count )
 557 {
 558     POINT offset;
 559
 560     WINPOS_GetWinOffset( hwndFrom, hwndTo, &offset );
 561     while (count--)
 562     {
 563         lppt->x += offset.x;
 564         lppt->y += offset.y;
 565         lppt++;
 566     }
 567     return MAKELONG( LOWORD(offset.x), LOWORD(offset.y) );
 568 }
 569
 570
 571 /***********************************************************************
 572  *              IsIconic (USER32.@)
 573  */
 574 BOOL WINAPI IsIconic(HWND hWnd)
 575 {
 576     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MINIMIZE) != 0;
 577 }
 578
 579
 580 /***********************************************************************
 581  *              IsZoomed (USER32.@)
 582  */
 583 BOOL WINAPI IsZoomed(HWND hWnd)
 584 {
 585     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MAXIMIZE) != 0;
 586 }
 587
 588
 589 /*******************************************************************
 590  *              AllowSetForegroundWindow (USER32.@)
 591  */
 592 BOOL WINAPI AllowSetForegroundWindow( DWORD procid )
 593 {
 594     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 595      * implemented, then fix this function. */
 596     return TRUE;
 597 }
 598
 599
 600 /*******************************************************************
 601  *              LockSetForegroundWindow (USER32.@)
 602  */
 603 BOOL WINAPI LockSetForegroundWindow( UINT lockcode )
 604 {
 605     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 606      * implemented, then fix this function. */
 607     return TRUE;
 608 }
 609
 610
 611 /***********************************************************************
 612  *              BringWindowToTop (USER32.@)
 613  */
 614 BOOL WINAPI BringWindowToTop( HWND hwnd )
 615 {
 616     return SetWindowPos( hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE );
 617 }
 618
 619
 620 /***********************************************************************
 621  *              MoveWindow (USER32.@)
 622  */
 623 BOOL WINAPI MoveWindow( HWND hwnd, INT x, INT y, INT cx, INT cy,
 624                             BOOL repaint )
 625 {
 626     int flags = SWP_NOZORDER | SWP_NOACTIVATE;
 627     if (!repaint) flags |= SWP_NOREDRAW;
 628     TRACE("%p %d,%d %dx%d %d\n", hwnd, x, y, cx, cy, repaint );
 629     return SetWindowPos( hwnd, 0, x, y, cx, cy, flags );
 630 }
 631
 632 /***********************************************************************
 633  *           WINPOS_InitInternalPos
 634  */
 635 static LPINTERNALPOS WINPOS_InitInternalPos( WND* wnd )
 636 {
 637     LPINTERNALPOS lpPos = GetPropA( wnd->hwndSelf, atomInternalPos );
 638     if( !lpPos )
 639     {
 640         /* this happens when the window is minimized/maximized
 641          * for the first time (rectWindow is not adjusted yet) */
 642
 643         lpPos = HeapAlloc( GetProcessHeap(), 0, sizeof(INTERNALPOS) );
 644         if( !lpPos ) return NULL;
 645
 646         SetPropA( wnd->hwndSelf, atomInternalPos, (HANDLE)lpPos );
 647         lpPos->hwndIconTitle = 0; /* defer until needs to be shown */
 648         lpPos->rectNormal.left   = wnd->rectWindow.left;
 649         lpPos->rectNormal.top    = wnd->rectWindow.top;
 650         lpPos->rectNormal.right  = wnd->rectWindow.right;
 651         lpPos->rectNormal.bottom = wnd->rectWindow.bottom;
 652         lpPos->ptIconPos.x = lpPos->ptIconPos.y = -1;
 653         lpPos->ptMaxPos.x = lpPos->ptMaxPos.y = -1;
 654     }
 655
 656     if( wnd->dwStyle & WS_MINIMIZE )
 657     {
 658         lpPos->ptIconPos.x = wnd->rectWindow.left;
 659         lpPos->ptIconPos.y = wnd->rectWindow.top;
 660     }
 661     else if( wnd->dwStyle & WS_MAXIMIZE )
 662     {
 663         lpPos->ptMaxPos.x = wnd->rectWindow.left;
 664         lpPos->ptMaxPos.y = wnd->rectWindow.top;
 665     }
 666     else
 667     {
 668         lpPos->rectNormal.left   = wnd->rectWindow.left;
 669         lpPos->rectNormal.top    = wnd->rectWindow.top;
 670         lpPos->rectNormal.right  = wnd->rectWindow.right;
 671         lpPos->rectNormal.bottom = wnd->rectWindow.bottom;
 672     }
 673     return lpPos;
 674 }
 675
 676 /***********************************************************************
 677  *           WINPOS_RedrawIconTitle
 678  */
 679 BOOL WINPOS_RedrawIconTitle( HWND hWnd )
 680 {
 681     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hWnd, atomInternalPos );
 682     if( lpPos )
 683     {
 684         if( lpPos->hwndIconTitle )
 685         {
 686             SendMessageA( lpPos->hwndIconTitle, WM_SHOWWINDOW, TRUE, 0);
 687             InvalidateRect( lpPos->hwndIconTitle, NULL, TRUE );
 688             return TRUE;
 689         }
 690     }
 691     return FALSE;
 692 }
 693
 694 /***********************************************************************
 695  *           WINPOS_ShowIconTitle
 696  */
 697 BOOL WINPOS_ShowIconTitle( HWND hwnd, BOOL bShow )
 698 {
 699     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 700
 701     if (lpPos && !GetPropA( hwnd, "__wine_x11_managed" ))
 702     {
 703         HWND title = lpPos->hwndIconTitle;
 704
 705         TRACE("%p %i\n", hwnd, (bShow != 0) );
 706
 707         if( !title )
 708             lpPos->hwndIconTitle = title = ICONTITLE_Create( hwnd );
 709         if( bShow )
 710         {
 711             if (!IsWindowVisible(title))
 712             {
 713                 SendMessageA( title, WM_SHOWWINDOW, TRUE, 0 );
 714                 SetWindowPos( title, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE |
 715                               SWP_NOACTIVATE | SWP_NOZORDER | SWP_SHOWWINDOW );
 716             }
 717         }
 718         else ShowWindow( title, SW_HIDE );
 719     }
 720     return FALSE;
 721 }
 722
 723 /*******************************************************************
 724  *           WINPOS_GetMinMaxInfo
 725  *
 726  * Get the minimized and maximized information for a window.
 727  */
 728 void WINPOS_GetMinMaxInfo( HWND hwnd, POINT *maxSize, POINT *maxPos,
 729                            POINT *minTrack, POINT *maxTrack )
 730 {
 731     LPINTERNALPOS lpPos;
 732     MINMAXINFO MinMax;
 733     INT xinc, yinc;
 734     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 735     LONG exstyle = GetWindowLongA( hwnd, GWL_EXSTYLE );
 736     RECT rc;
 737
 738     /* Compute default values */
 739
 740     GetWindowRect(hwnd, &rc);
 741     MinMax.ptReserved.x = rc.left;
 742     MinMax.ptReserved.y = rc.top;
 743
 744     if (style & WS_CHILD)
 745     {
 746         if ((style & WS_CAPTION) == WS_CAPTION)
 747             style &= ~WS_BORDER; /* WS_CAPTION = WS_DLGFRAME | WS_BORDER */
 748
 749         GetClientRect(GetAncestor(hwnd,GA_PARENT), &rc);
 750         AdjustWindowRectEx(&rc, style, ((style & WS_POPUP) && GetMenu(hwnd)), exstyle);
 751
 752         /* avoid calculating this twice */
 753         style &= ~(WS_DLGFRAME | WS_BORDER | WS_THICKFRAME);
 754
 755         MinMax.ptMaxSize.x = rc.right - rc.left;
 756         MinMax.ptMaxSize.y = rc.bottom - rc.top;
 757     }
 758     else
 759     {
 760         MinMax.ptMaxSize.x = GetSystemMetrics(SM_CXSCREEN);
 761         MinMax.ptMaxSize.y = GetSystemMetrics(SM_CYSCREEN);
 762     }
 763     MinMax.ptMinTrackSize.x = GetSystemMetrics(SM_CXMINTRACK);
 764     MinMax.ptMinTrackSize.y = GetSystemMetrics(SM_CYMINTRACK);
 765     MinMax.ptMaxTrackSize.x = GetSystemMetrics(SM_CXSCREEN) + 2*GetSystemMetrics(SM_CXFRAME);
 766     MinMax.ptMaxTrackSize.y = GetSystemMetrics(SM_CYSCREEN) + 2*GetSystemMetrics(SM_CYFRAME);
 767
 768     if (HAS_DLGFRAME( style, exstyle ))
 769     {
 770         xinc = GetSystemMetrics(SM_CXDLGFRAME);
 771         yinc = GetSystemMetrics(SM_CYDLGFRAME);
 772     }
 773     else
 774     {
 775         xinc = yinc = 0;
 776         if (HAS_THICKFRAME(style))
 777         {
 778             xinc += GetSystemMetrics(SM_CXFRAME);
 779             yinc += GetSystemMetrics(SM_CYFRAME);
 780         }
 781         if (style & WS_BORDER)
 782         {
 783             xinc += GetSystemMetrics(SM_CXBORDER);
 784             yinc += GetSystemMetrics(SM_CYBORDER);
 785         }
 786     }
 787     MinMax.ptMaxSize.x += 2 * xinc;
 788     MinMax.ptMaxSize.y += 2 * yinc;
 789
 790     lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 791     if( lpPos && !EMPTYPOINT(lpPos->ptMaxPos) )
 792     {
 793         MinMax.ptMaxPosition.x = lpPos->ptMaxPos.x;
 794         MinMax.ptMaxPosition.y = lpPos->ptMaxPos.y;
 795     }
 796     else
 797     {
 798         MinMax.ptMaxPosition.x = -xinc;
 799         MinMax.ptMaxPosition.y = -yinc;
 800     }
 801
 802     SendMessageA( hwnd, WM_GETMINMAXINFO, 0, (LPARAM)&MinMax );
 803
 804       /* Some sanity checks */
 805
 806     TRACE("%ld %ld / %ld %ld / %ld %ld / %ld %ld\n",
 807                       MinMax.ptMaxSize.x, MinMax.ptMaxSize.y,
 808                       MinMax.ptMaxPosition.x, MinMax.ptMaxPosition.y,
 809                       MinMax.ptMaxTrackSize.x, MinMax.ptMaxTrackSize.y,
 810                       MinMax.ptMinTrackSize.x, MinMax.ptMinTrackSize.y);
 811     MinMax.ptMaxTrackSize.x = max( MinMax.ptMaxTrackSize.x,
 812                                    MinMax.ptMinTrackSize.x );
 813     MinMax.ptMaxTrackSize.y = max( MinMax.ptMaxTrackSize.y,
 814                                    MinMax.ptMinTrackSize.y );
 815
 816     if (maxSize) *maxSize = MinMax.ptMaxSize;
 817     if (maxPos) *maxPos = MinMax.ptMaxPosition;
 818     if (minTrack) *minTrack = MinMax.ptMinTrackSize;
 819     if (maxTrack) *maxTrack = MinMax.ptMaxTrackSize;
 820 }
 821
 822 /***********************************************************************
 823  *              ShowWindowAsync (USER32.@)
 824  *
 825  * doesn't wait; returns immediately.
 826  * used by threads to toggle windows in other (possibly hanging) threads
 827  */
 828 BOOL WINAPI ShowWindowAsync( HWND hwnd, INT cmd )
 829 {
 830     HWND full_handle;
 831
 832     if (is_broadcast(hwnd))
 833     {
 834         SetLastError( ERROR_INVALID_PARAMETER );
 835         return FALSE;
 836     }
 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 SendNotifyMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 845 }
 846
 847
 848 /***********************************************************************
 849  *              ShowWindow (USER32.@)
 850  */
 851 BOOL WINAPI ShowWindow( HWND hwnd, INT cmd )
 852 {
 853     HWND full_handle;
 854
 855     if (is_broadcast(hwnd))
 856     {
 857         SetLastError( ERROR_INVALID_PARAMETER );
 858         return FALSE;
 859     }
 860     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 861     {
 862         if (USER_Driver.pShowWindow)
 863             return USER_Driver.pShowWindow( full_handle, cmd );
 864         return FALSE;
 865     }
 866     return SendMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 867 }
 868
 869
 870 /***********************************************************************
 871  *              GetInternalWindowPos (USER32.@)
 872  */
 873 UINT WINAPI GetInternalWindowPos( HWND hwnd, LPRECT rectWnd,
 874                                       LPPOINT ptIcon )
 875 {
 876     WINDOWPLACEMENT wndpl;
 877     if (GetWindowPlacement( hwnd, &wndpl ))
 878     {
 879         if (rectWnd) *rectWnd = wndpl.rcNormalPosition;
 880         if (ptIcon)  *ptIcon = wndpl.ptMinPosition;
 881         return wndpl.showCmd;
 882     }
 883     return 0;
 884 }
 885
 886
 887 /***********************************************************************
 888  *              GetWindowPlacement (USER32.@)
 889  *
 890  * Win95:
 891  * Fails if wndpl->length of Win95 (!) apps is invalid.
 892  */
 893 BOOL WINAPI GetWindowPlacement( HWND hwnd, WINDOWPLACEMENT *wndpl )
 894 {
 895     WND *pWnd = WIN_GetPtr( hwnd );
 896     LPINTERNALPOS lpPos;
 897
 898     if (!pWnd || pWnd == WND_DESKTOP) return FALSE;
 899     if (pWnd == WND_OTHER_PROCESS)
 900     {
 901         if (IsWindow( hwnd )) FIXME( "not supported on other process window %p\n", hwnd );
 902         return FALSE;
 903     }
 904
 905     lpPos = WINPOS_InitInternalPos( pWnd );
 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     wndpl->ptMinPosition.x = lpPos->ptIconPos.x;
 916     wndpl->ptMinPosition.y = lpPos->ptIconPos.y;
 917     wndpl->ptMaxPosition.x = lpPos->ptMaxPos.x;
 918     wndpl->ptMaxPosition.y = lpPos->ptMaxPos.y;
 919     wndpl->rcNormalPosition.left   = lpPos->rectNormal.left;
 920     wndpl->rcNormalPosition.top    = lpPos->rectNormal.top;
 921     wndpl->rcNormalPosition.right  = lpPos->rectNormal.right;
 922     wndpl->rcNormalPosition.bottom = lpPos->rectNormal.bottom;
 923     WIN_ReleasePtr( pWnd );
 924     return TRUE;
 925 }
 926
 927
 928 /***********************************************************************
 929  *           WINPOS_SetPlacement
 930  */
 931 static BOOL WINPOS_SetPlacement( HWND hwnd, const WINDOWPLACEMENT *wndpl, UINT flags )
 932 {
 933     LPINTERNALPOS lpPos;
 934     DWORD style;
 935     WND *pWnd = WIN_GetPtr( hwnd );
 936
 937     if (!pWnd || pWnd == WND_OTHER_PROCESS || pWnd == WND_DESKTOP) return FALSE;
 938     lpPos = WINPOS_InitInternalPos( pWnd );
 939
 940     if( flags & PLACE_MIN )
 941     {
 942         lpPos->ptIconPos.x = wndpl->ptMinPosition.x;
 943         lpPos->ptIconPos.y = wndpl->ptMinPosition.y;
 944     }
 945     if( flags & PLACE_MAX )
 946     {
 947         lpPos->ptMaxPos.x = wndpl->ptMaxPosition.x;
 948         lpPos->ptMaxPos.y = wndpl->ptMaxPosition.y;
 949     }
 950     if( flags & PLACE_RECT)
 951     {
 952         lpPos->rectNormal.left   = wndpl->rcNormalPosition.left;
 953         lpPos->rectNormal.top    = wndpl->rcNormalPosition.top;
 954         lpPos->rectNormal.right  = wndpl->rcNormalPosition.right;
 955         lpPos->rectNormal.bottom = wndpl->rcNormalPosition.bottom;
 956     }
 957
 958     style = pWnd->dwStyle;
 959     WIN_ReleasePtr( pWnd );
 960
 961     if( style & WS_MINIMIZE )
 962     {
 963         WINPOS_ShowIconTitle( hwnd, FALSE );
 964         if( wndpl->flags & WPF_SETMINPOSITION && !EMPTYPOINT(lpPos->ptIconPos))
 965             SetWindowPos( hwnd, 0, lpPos->ptIconPos.x, lpPos->ptIconPos.y,
 966                           0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 967     }
 968     else if( style & WS_MAXIMIZE )
 969     {
 970         if( !EMPTYPOINT(lpPos->ptMaxPos) )
 971             SetWindowPos( hwnd, 0, lpPos->ptMaxPos.x, lpPos->ptMaxPos.y,
 972                           0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 973     }
 974     else if( flags & PLACE_RECT )
 975         SetWindowPos( hwnd, 0, lpPos->rectNormal.left, lpPos->rectNormal.top,
 976                       lpPos->rectNormal.right - lpPos->rectNormal.left,
 977                       lpPos->rectNormal.bottom - lpPos->rectNormal.top,
 978                       SWP_NOZORDER | SWP_NOACTIVATE );
 979
 980     ShowWindow( hwnd, wndpl->showCmd );
 981
 982     if (IsIconic( hwnd ))
 983     {
 984         if (GetWindowLongW( hwnd, GWL_STYLE ) & WS_VISIBLE) WINPOS_ShowIconTitle( hwnd, TRUE );
 985
 986         /* SDK: ...valid only the next time... */
 987         if( wndpl->flags & WPF_RESTORETOMAXIMIZED )
 988         {
 989             pWnd = WIN_GetPtr( hwnd );
 990             if (pWnd && pWnd != WND_OTHER_PROCESS)
 991             {
 992                 pWnd->flags |= WIN_RESTORE_MAX;
 993                 WIN_ReleasePtr( pWnd );
 994             }
 995         }
 996     }
 997     return TRUE;
 998 }
 999
1000
1001 /***********************************************************************
1002  *              SetWindowPlacement (USER32.@)
1003  *
1004  * Win95:
1005  * Fails if wndpl->length of Win95 (!) apps is invalid.
1006  */
1007 BOOL WINAPI SetWindowPlacement( HWND hwnd, const WINDOWPLACEMENT *wpl )
1008 {
1009     if (!wpl) return FALSE;
1010     return WINPOS_SetPlacement( hwnd, wpl, PLACE_MIN | PLACE_MAX | PLACE_RECT );
1011 }
1012
1013
1014 /***********************************************************************
1015  *              AnimateWindow (USER32.@)
1016  *              Shows/Hides a window with an animation
1017  *              NO ANIMATION YET
1018  */
1019 BOOL WINAPI AnimateWindow(HWND hwnd, DWORD dwTime, DWORD dwFlags)
1020 {
1021         FIXME("partial stub\n");
1022
1023         /* If trying to show/hide and it's already   *
1024          * shown/hidden or invalid window, fail with *
1025          * invalid parameter                         */
1026         if(!IsWindow(hwnd) ||
1027            (IsWindowVisible(hwnd) && !(dwFlags & AW_HIDE)) ||
1028            (!IsWindowVisible(hwnd) && (dwFlags & AW_HIDE)))
1029         {
1030                 SetLastError(ERROR_INVALID_PARAMETER);
1031                 return FALSE;
1032         }
1033
1034         ShowWindow(hwnd, (dwFlags & AW_HIDE) ? SW_HIDE : ((dwFlags & AW_ACTIVATE) ? SW_SHOW : SW_SHOWNA));
1035
1036         return TRUE;
1037 }
1038
1039 /***********************************************************************
1040  *              SetInternalWindowPos (USER32.@)
1041  */
1042 void WINAPI SetInternalWindowPos( HWND hwnd, UINT showCmd,
1043                                     LPRECT rect, LPPOINT pt )
1044 {
1045     if( IsWindow(hwnd) )
1046     {
1047         WINDOWPLACEMENT wndpl;
1048         UINT flags;
1049
1050         wndpl.length  = sizeof(wndpl);
1051         wndpl.showCmd = showCmd;
1052         wndpl.flags = flags = 0;
1053
1054         if( pt )
1055         {
1056             flags |= PLACE_MIN;
1057             wndpl.flags |= WPF_SETMINPOSITION;
1058             wndpl.ptMinPosition = *pt;
1059         }
1060         if( rect )
1061         {
1062             flags |= PLACE_RECT;
1063             wndpl.rcNormalPosition = *rect;
1064         }
1065         WINPOS_SetPlacement( hwnd, &wndpl, flags );
1066     }
1067 }
1068
1069
1070 /*******************************************************************
1071  *         can_activate_window
1072  *
1073  * Check if we can activate the specified window.
1074  */
1075 static BOOL can_activate_window( HWND hwnd )
1076 {
1077     LONG style;
1078
1079     if (!hwnd) return FALSE;
1080     style = GetWindowLongW( hwnd, GWL_STYLE );
1081     if (!(style & WS_VISIBLE)) return FALSE;
1082     if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return FALSE;
1083     return !(style & WS_DISABLED);
1084 }
1085
1086
1087 /*******************************************************************
1088  *         WINPOS_ActivateOtherWindow
1089  *
1090  *  Activates window other than pWnd.
1091  */
1092 void WINPOS_ActivateOtherWindow(HWND hwnd)
1093 {
1094     HWND hwndTo, fg;
1095
1096     if ((GetWindowLongW( hwnd, GWL_STYLE ) & WS_POPUP) && (hwndTo = GetWindow( hwnd, GW_OWNER )))
1097     {
1098         hwndTo = GetAncestor( hwndTo, GA_ROOT );
1099         if (can_activate_window( hwndTo )) goto done;
1100     }
1101
1102     hwndTo = hwnd;
1103     for (;;)
1104     {
1105         if (!(hwndTo = GetWindow( hwndTo, GW_HWNDNEXT ))) break;
1106         if (can_activate_window( hwndTo )) break;
1107     }
1108
1109  done:
1110     fg = GetForegroundWindow();
1111     TRACE("win = %p fg = %p\n", hwndTo, fg);
1112     if (!fg || (hwnd == fg))
1113     {
1114         if (SetForegroundWindow( hwndTo )) return;
1115     }
1116     if (!SetActiveWindow( hwndTo )) SetActiveWindow(0);
1117 }
1118
1119
1120 /***********************************************************************
1121  *           WINPOS_HandleWindowPosChanging
1122  *
1123  * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
1124  */
1125 LONG WINPOS_HandleWindowPosChanging( HWND hwnd, WINDOWPOS *winpos )
1126 {
1127     POINT minTrack, maxTrack;
1128     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1129
1130     if (winpos->flags & SWP_NOSIZE) return 0;
1131     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
1132     {
1133         WINPOS_GetMinMaxInfo( hwnd, NULL, NULL, &minTrack, &maxTrack );
1134         if (winpos->cx > maxTrack.x) winpos->cx = maxTrack.x;
1135         if (winpos->cy > maxTrack.y) winpos->cy = maxTrack.y;
1136         if (!(style & WS_MINIMIZE))
1137         {
1138             if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
1139             if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
1140         }
1141     }
1142     return 0;
1143 }
1144
1145
1146 /***********************************************************************
1147  *           dump_winpos_flags
1148  */
1149 static void dump_winpos_flags(UINT flags)
1150 {
1151     TRACE("flags:");
1152     if(flags & SWP_NOSIZE) TRACE(" SWP_NOSIZE");
1153     if(flags & SWP_NOMOVE) TRACE(" SWP_NOMOVE");
1154     if(flags & SWP_NOZORDER) TRACE(" SWP_NOZORDER");
1155     if(flags & SWP_NOREDRAW) TRACE(" SWP_NOREDRAW");
1156     if(flags & SWP_NOACTIVATE) TRACE(" SWP_NOACTIVATE");
1157     if(flags & SWP_FRAMECHANGED) TRACE(" SWP_FRAMECHANGED");
1158     if(flags & SWP_SHOWWINDOW) TRACE(" SWP_SHOWWINDOW");
1159     if(flags & SWP_HIDEWINDOW) TRACE(" SWP_HIDEWINDOW");
1160     if(flags & SWP_NOCOPYBITS) TRACE(" SWP_NOCOPYBITS");
1161     if(flags & SWP_NOOWNERZORDER) TRACE(" SWP_NOOWNERZORDER");
1162     if(flags & SWP_NOSENDCHANGING) TRACE(" SWP_NOSENDCHANGING");
1163     if(flags & SWP_DEFERERASE) TRACE(" SWP_DEFERERASE");
1164     if(flags & SWP_ASYNCWINDOWPOS) TRACE(" SWP_ASYNCWINDOWPOS");
1165
1166 #define DUMPED_FLAGS \
1167     (SWP_NOSIZE | \
1168     SWP_NOMOVE | \
1169     SWP_NOZORDER | \
1170     SWP_NOREDRAW | \
1171     SWP_NOACTIVATE | \
1172     SWP_FRAMECHANGED | \
1173     SWP_SHOWWINDOW | \
1174     SWP_HIDEWINDOW | \
1175     SWP_NOCOPYBITS | \
1176     SWP_NOOWNERZORDER | \
1177     SWP_NOSENDCHANGING | \
1178     SWP_DEFERERASE | \
1179     SWP_ASYNCWINDOWPOS)
1180
1181     if(flags & ~DUMPED_FLAGS) TRACE(" %08x", flags & ~DUMPED_FLAGS);
1182     TRACE("\n");
1183 #undef DUMPED_FLAGS
1184 }
1185
1186 /***********************************************************************
1187  *              SetWindowPos (USER32.@)
1188  */
1189 BOOL WINAPI SetWindowPos( HWND hwnd, HWND hwndInsertAfter,
1190                           INT x, INT y, INT cx, INT cy, UINT flags )
1191 {
1192     WINDOWPOS winpos;
1193
1194     TRACE("hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1195           hwnd, hwndInsertAfter, x, y, cx, cy, flags);
1196     if(TRACE_ON(win)) dump_winpos_flags(flags);
1197
1198     if (is_broadcast(hwnd))
1199     {
1200         SetLastError( ERROR_INVALID_PARAMETER );
1201         return FALSE;
1202     }
1203
1204     winpos.hwnd = WIN_GetFullHandle(hwnd);
1205     winpos.hwndInsertAfter = WIN_GetFullHandle(hwndInsertAfter);
1206     winpos.x = x;
1207     winpos.y = y;
1208     winpos.cx = cx;
1209     winpos.cy = cy;
1210     winpos.flags = flags;
1211     if (WIN_IsCurrentThread( hwnd ))
1212     {
1213         if (USER_Driver.pSetWindowPos)
1214             return USER_Driver.pSetWindowPos( &winpos );
1215         return FALSE;
1216     }
1217     return SendMessageW( winpos.hwnd, WM_WINE_SETWINDOWPOS, 0, (LPARAM)&winpos );
1218 }
1219
1220
1221 /***********************************************************************
1222  *              BeginDeferWindowPos (USER32.@)
1223  */
1224 HDWP WINAPI BeginDeferWindowPos( INT count )
1225 {
1226     HDWP handle;
1227     DWP *pDWP;
1228
1229     TRACE("%d\n", count);
1230
1231     if (count < 0)
1232     {
1233         SetLastError(ERROR_INVALID_PARAMETER);
1234         return 0;
1235     }
1236     /* Windows allows zero count, in which case it allocates context for 8 moves */
1237     if (count == 0) count = 8;
1238
1239     handle = USER_HEAP_ALLOC( sizeof(DWP) + (count-1)*sizeof(WINDOWPOS) );
1240     if (!handle) return 0;
1241     pDWP = (DWP *) USER_HEAP_LIN_ADDR( handle );
1242     pDWP->actualCount    = 0;
1243     pDWP->suggestedCount = count;
1244     pDWP->valid          = TRUE;
1245     pDWP->wMagic         = DWP_MAGIC;
1246     pDWP->hwndParent     = 0;
1247
1248     TRACE("returning hdwp %p\n", handle);
1249     return handle;
1250 }
1251
1252
1253 /***********************************************************************
1254  *              DeferWindowPos (USER32.@)
1255  */
1256 HDWP WINAPI DeferWindowPos( HDWP hdwp, HWND hwnd, HWND hwndAfter,
1257                                 INT x, INT y, INT cx, INT cy,
1258                                 UINT flags )
1259 {
1260     DWP *pDWP;
1261     int i;
1262     HDWP newhdwp = hdwp,retvalue;
1263
1264     TRACE("hdwp %p, hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1265           hdwp, hwnd, hwndAfter, x, y, cx, cy, flags);
1266
1267     hwnd = WIN_GetFullHandle( hwnd );
1268     if (hwnd == GetDesktopWindow()) return 0;
1269
1270     if (!(pDWP = USER_HEAP_LIN_ADDR( hdwp ))) return 0;
1271
1272     USER_Lock();
1273
1274     for (i = 0; i < pDWP->actualCount; i++)
1275     {
1276         if (pDWP->winPos[i].hwnd == hwnd)
1277         {
1278               /* Merge with the other changes */
1279             if (!(flags & SWP_NOZORDER))
1280             {
1281                 pDWP->winPos[i].hwndInsertAfter = WIN_GetFullHandle(hwndAfter);
1282             }
1283             if (!(flags & SWP_NOMOVE))
1284             {
1285                 pDWP->winPos[i].x = x;
1286                 pDWP->winPos[i].y = y;
1287             }
1288             if (!(flags & SWP_NOSIZE))
1289             {
1290                 pDWP->winPos[i].cx = cx;
1291                 pDWP->winPos[i].cy = cy;
1292             }
1293             pDWP->winPos[i].flags &= flags | ~(SWP_NOSIZE | SWP_NOMOVE |
1294                                                SWP_NOZORDER | SWP_NOREDRAW |
1295                                                SWP_NOACTIVATE | SWP_NOCOPYBITS|
1296                                                SWP_NOOWNERZORDER);
1297             pDWP->winPos[i].flags |= flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW |
1298                                               SWP_FRAMECHANGED);
1299             retvalue = hdwp;
1300             goto END;
1301         }
1302     }
1303     if (pDWP->actualCount >= pDWP->suggestedCount)
1304     {
1305         newhdwp = USER_HEAP_REALLOC( hdwp,
1306                       sizeof(DWP) + pDWP->suggestedCount*sizeof(WINDOWPOS) );
1307         if (!newhdwp)
1308         {
1309             retvalue = 0;
1310             goto END;
1311         }
1312         pDWP = (DWP *) USER_HEAP_LIN_ADDR( newhdwp );
1313         pDWP->suggestedCount++;
1314     }
1315     pDWP->winPos[pDWP->actualCount].hwnd = hwnd;
1316     pDWP->winPos[pDWP->actualCount].hwndInsertAfter = hwndAfter;
1317     pDWP->winPos[pDWP->actualCount].x = x;
1318     pDWP->winPos[pDWP->actualCount].y = y;
1319     pDWP->winPos[pDWP->actualCount].cx = cx;
1320     pDWP->winPos[pDWP->actualCount].cy = cy;
1321     pDWP->winPos[pDWP->actualCount].flags = flags;
1322     pDWP->actualCount++;
1323     retvalue = newhdwp;
1324 END:
1325     USER_Unlock();
1326     return retvalue;
1327 }
1328
1329
1330 /***********************************************************************
1331  *              EndDeferWindowPos (USER32.@)
1332  */
1333 BOOL WINAPI EndDeferWindowPos( HDWP hdwp )
1334 {
1335     DWP *pDWP;
1336     WINDOWPOS *winpos;
1337     BOOL res = TRUE;
1338     int i;
1339
1340     TRACE("%p\n", hdwp);
1341
1342     pDWP = (DWP *) USER_HEAP_LIN_ADDR( hdwp );
1343     if (!pDWP) return FALSE;
1344     for (i = 0, winpos = pDWP->winPos; i < pDWP->actualCount; i++, winpos++)
1345     {
1346         if (!USER_Driver.pSetWindowPos || !(res = USER_Driver.pSetWindowPos( winpos ))) break;
1347     }
1348     USER_HEAP_FREE( hdwp );
1349     return res;
1350 }
1351
1352
1353 /***********************************************************************
1354  *              TileChildWindows (USER.199)
1355  */
1356 void WINAPI TileChildWindows16( HWND16 parent, WORD action )
1357 {
1358     FIXME("(%04x, %d): stub\n", parent, action);
1359 }
1360
1361 /***********************************************************************
1362  *              CascadeChildWindows (USER.198)
1363  */
1364 void WINAPI CascadeChildWindows16( HWND16 parent, WORD action )
1365 {
1366     FIXME("(%04x, %d): stub\n", parent, action);
1367 }