git.oblomov.eu Git - wine/blob - dlls/user/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 "winpos.h"
  39 #include "wine/debug.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(win);
  42
  43 #define HAS_DLGFRAME(style,exStyle) \
  44     (((exStyle) & WS_EX_DLGMODALFRAME) || \
  45      (((style) & WS_DLGFRAME) && !((style) & WS_BORDER)))
  46
  47 #define HAS_THICKFRAME(style) \
  48     (((style) & WS_THICKFRAME) && \
  49      !(((style) & (WS_DLGFRAME|WS_BORDER)) == WS_DLGFRAME))
  50
  51 #define EMPTYPOINT(pt)          ((*(LONG*)&(pt)) == -1)
  52
  53 #define PLACE_MIN               0x0001
  54 #define PLACE_MAX               0x0002
  55 #define PLACE_RECT              0x0004
  56
  57
  58 #define DWP_MAGIC  ((INT)('W' | ('P' << 8) | ('O' << 16) | ('S' << 24)))
  59
  60 typedef struct
  61 {
  62     INT       actualCount;
  63     INT       suggestedCount;
  64     BOOL      valid;
  65     INT       wMagic;
  66     HWND      hwndParent;
  67     WINDOWPOS winPos[1];
  68 } DWP;
  69
  70 typedef struct
  71 {
  72     RECT16   rectNormal;
  73     POINT16  ptIconPos;
  74     POINT16  ptMaxPos;
  75     HWND     hwndIconTitle;
  76 } INTERNALPOS, *LPINTERNALPOS;
  77
  78 /* ----- internal variables ----- */
  79
  80 static LPCSTR atomInternalPos;
  81
  82
  83 /***********************************************************************
  84  *           WINPOS_CreateInternalPosAtom
  85  */
  86 BOOL WINPOS_CreateInternalPosAtom()
  87 {
  88     LPCSTR str = "SysIP";
  89     atomInternalPos = (LPCSTR)(DWORD)GlobalAddAtomA(str);
  90     return (atomInternalPos) ? TRUE : FALSE;
  91 }
  92
  93 /***********************************************************************
  94  *           WINPOS_CheckInternalPos
  95  *
  96  * Called when a window is destroyed.
  97  */
  98 void WINPOS_CheckInternalPos( HWND hwnd )
  99 {
 100     LPINTERNALPOS lpPos = (LPINTERNALPOS) GetPropA( hwnd, atomInternalPos );
 101
 102     if( lpPos )
 103     {
 104         if( IsWindow(lpPos->hwndIconTitle) )
 105             DestroyWindow( lpPos->hwndIconTitle );
 106         HeapFree( GetProcessHeap(), 0, lpPos );
 107     }
 108 }
 109
 110 /***********************************************************************
 111  *              ArrangeIconicWindows (USER32.@)
 112  */
 113 UINT WINAPI ArrangeIconicWindows( HWND parent )
 114 {
 115     RECT rectParent;
 116     HWND hwndChild;
 117     INT x, y, xspacing, yspacing;
 118
 119     GetClientRect( parent, &rectParent );
 120     x = rectParent.left;
 121     y = rectParent.bottom;
 122     xspacing = GetSystemMetrics(SM_CXICONSPACING);
 123     yspacing = GetSystemMetrics(SM_CYICONSPACING);
 124
 125     hwndChild = GetWindow( parent, GW_CHILD );
 126     while (hwndChild)
 127     {
 128         if( IsIconic( hwndChild ) )
 129         {
 130             WINPOS_ShowIconTitle( hwndChild, FALSE );
 131
 132             SetWindowPos( hwndChild, 0, x + (xspacing - GetSystemMetrics(SM_CXICON)) / 2,
 133                             y - yspacing - GetSystemMetrics(SM_CYICON)/2, 0, 0,
 134                             SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 135             if( IsWindow(hwndChild) )
 136                 WINPOS_ShowIconTitle(hwndChild , TRUE );
 137
 138             if (x <= rectParent.right - xspacing) x += xspacing;
 139             else
 140             {
 141                 x = rectParent.left;
 142                 y -= yspacing;
 143             }
 144         }
 145         hwndChild = GetWindow( hwndChild, GW_HWNDNEXT );
 146     }
 147     return yspacing;
 148 }
 149
 150
 151 /***********************************************************************
 152  *              SwitchToThisWindow (USER32.@)
 153  */
 154 void WINAPI SwitchToThisWindow( HWND hwnd, BOOL restore )
 155 {
 156     ShowWindow( hwnd, restore ? SW_RESTORE : SW_SHOWMINIMIZED );
 157 }
 158
 159
 160 /***********************************************************************
 161  *              GetWindowRect (USER32.@)
 162  */
 163 BOOL WINAPI GetWindowRect( HWND hwnd, LPRECT rect )
 164 {
 165     BOOL ret = WIN_GetRectangles( hwnd, rect, NULL );
 166     if (ret)
 167     {
 168         MapWindowPoints( GetAncestor( hwnd, GA_PARENT ), 0, (POINT *)rect, 2 );
 169         TRACE( "hwnd %p (%ld,%ld)-(%ld,%ld)\n",
 170                hwnd, rect->left, rect->top, rect->right, rect->bottom);
 171     }
 172     return ret;
 173 }
 174
 175
 176 /***********************************************************************
 177  *              GetWindowRgn (USER32.@)
 178  */
 179 int WINAPI GetWindowRgn ( HWND hwnd, HRGN hrgn )
 180 {
 181     int nRet = ERROR;
 182     NTSTATUS status;
 183     HRGN win_rgn = 0;
 184     RGNDATA *data;
 185     size_t size = 256;
 186
 187     do
 188     {
 189         if (!(data = HeapAlloc( GetProcessHeap(), 0, sizeof(*data) + size - 1 )))
 190         {
 191             SetLastError( ERROR_OUTOFMEMORY );
 192             return ERROR;
 193         }
 194         SERVER_START_REQ( get_window_region )
 195         {
 196             req->window = hwnd;
 197             wine_server_set_reply( req, data->Buffer, size );
 198             if (!(status = wine_server_call( req )))
 199             {
 200                 size_t reply_size = wine_server_reply_size( reply );
 201                 if (reply_size)
 202                 {
 203                     data->rdh.dwSize   = sizeof(data->rdh);
 204                     data->rdh.iType    = RDH_RECTANGLES;
 205                     data->rdh.nCount   = reply_size / sizeof(RECT);
 206                     data->rdh.nRgnSize = reply_size;
 207                     win_rgn = ExtCreateRegion( NULL, size, data );
 208                 }
 209             }
 210             else size = reply->total_size;
 211         }
 212         SERVER_END_REQ;
 213         HeapFree( GetProcessHeap(), 0, data );
 214     } while (status == STATUS_BUFFER_OVERFLOW);
 215
 216     if (status) SetLastError( RtlNtStatusToDosError(status) );
 217     else if (win_rgn)
 218     {
 219         nRet = CombineRgn( hrgn, win_rgn, 0, RGN_COPY );
 220         DeleteObject( win_rgn );
 221     }
 222     return nRet;
 223 }
 224
 225
 226 /***********************************************************************
 227  *              SetWindowRgn (USER32.@)
 228  */
 229 int WINAPI SetWindowRgn( HWND hwnd, HRGN hrgn, BOOL bRedraw )
 230 {
 231     static const RECT empty_rect;
 232     BOOL ret;
 233
 234     if (hrgn)
 235     {
 236         RGNDATA *data;
 237         DWORD size;
 238
 239         if (!(size = GetRegionData( hrgn, 0, NULL ))) return FALSE;
 240         if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE;
 241         if (!GetRegionData( hrgn, size, data ))
 242         {
 243             HeapFree( GetProcessHeap(), 0, data );
 244             return FALSE;
 245         }
 246         SERVER_START_REQ( set_window_region )
 247         {
 248             req->window = hwnd;
 249             if (data->rdh.nCount)
 250                 wine_server_add_data( req, data->Buffer, data->rdh.nCount * sizeof(RECT) );
 251             else
 252                 wine_server_add_data( req, &empty_rect, sizeof(empty_rect) );
 253             ret = !wine_server_call_err( req );
 254         }
 255         SERVER_END_REQ;
 256     }
 257     else  /* clear existing region */
 258     {
 259         SERVER_START_REQ( set_window_region )
 260         {
 261             req->window = hwnd;
 262             ret = !wine_server_call_err( req );
 263         }
 264         SERVER_END_REQ;
 265     }
 266
 267     if (ret && USER_Driver.pSetWindowRgn)
 268         ret = USER_Driver.pSetWindowRgn( hwnd, hrgn, bRedraw );
 269
 270     if (ret && bRedraw) RedrawWindow( hwnd, NULL, 0, RDW_FRAME | RDW_INVALIDATE | RDW_ERASE );
 271     return ret;
 272 }
 273
 274
 275 /***********************************************************************
 276  *              GetClientRect (USER32.@)
 277  */
 278 BOOL WINAPI GetClientRect( HWND hwnd, LPRECT rect )
 279 {
 280     BOOL ret;
 281
 282     if ((ret = WIN_GetRectangles( hwnd, NULL, rect )))
 283     {
 284         rect->right -= rect->left;
 285         rect->bottom -= rect->top;
 286         rect->left = rect->top = 0;
 287     }
 288     return ret;
 289 }
 290
 291
 292 /*******************************************************************
 293  *              ClientToScreen (USER32.@)
 294  */
 295 BOOL WINAPI ClientToScreen( HWND hwnd, LPPOINT lppnt )
 296 {
 297     MapWindowPoints( hwnd, 0, lppnt, 1 );
 298     return TRUE;
 299 }
 300
 301
 302 /*******************************************************************
 303  *              ScreenToClient (USER32.@)
 304  */
 305 BOOL WINAPI ScreenToClient( HWND hwnd, LPPOINT lppnt )
 306 {
 307     MapWindowPoints( 0, hwnd, lppnt, 1 );
 308     return TRUE;
 309 }
 310
 311
 312 /***********************************************************************
 313  *           list_children_from_point
 314  *
 315  * Get the list of children that can contain point from the server.
 316  * Point is in screen coordinates.
 317  * Returned list must be freed by caller.
 318  */
 319 static HWND *list_children_from_point( HWND hwnd, POINT pt )
 320 {
 321     HWND *list;
 322     int size = 32;
 323
 324     for (;;)
 325     {
 326         int count = 0;
 327
 328         if (!(list = HeapAlloc( GetProcessHeap(), 0, size * sizeof(HWND) ))) break;
 329
 330         SERVER_START_REQ( get_window_children_from_point )
 331         {
 332             req->parent = hwnd;
 333             req->x = pt.x;
 334             req->y = pt.y;
 335             wine_server_set_reply( req, list, (size-1) * sizeof(HWND) );
 336             if (!wine_server_call( req )) count = reply->count;
 337         }
 338         SERVER_END_REQ;
 339         if (count && count < size)
 340         {
 341             list[count] = 0;
 342             return list;
 343         }
 344         HeapFree( GetProcessHeap(), 0, list );
 345         if (!count) break;
 346         size = count + 1;  /* restart with a large enough buffer */
 347     }
 348     return NULL;
 349 }
 350
 351
 352 /***********************************************************************
 353  *           WINPOS_WindowFromPoint
 354  *
 355  * Find the window and hittest for a given point.
 356  */
 357 HWND WINPOS_WindowFromPoint( HWND hwndScope, POINT pt, INT *hittest )
 358 {
 359     int i, res;
 360     HWND ret, *list;
 361
 362     if (!hwndScope) hwndScope = GetDesktopWindow();
 363
 364     *hittest = HTNOWHERE;
 365
 366     if (!(list = list_children_from_point( hwndScope, pt ))) return 0;
 367
 368     /* now determine the hittest */
 369
 370     for (i = 0; list[i]; i++)
 371     {
 372         LONG style = GetWindowLongW( list[i], GWL_STYLE );
 373
 374         /* If window is minimized or disabled, return at once */
 375         if (style & WS_MINIMIZE)
 376         {
 377             *hittest = HTCAPTION;
 378             break;
 379         }
 380         if (style & WS_DISABLED)
 381         {
 382             *hittest = HTERROR;
 383             break;
 384         }
 385         /* Send WM_NCCHITTEST (if same thread) */
 386         if (!WIN_IsCurrentThread( list[i] ))
 387         {
 388             *hittest = HTCLIENT;
 389             break;
 390         }
 391         res = SendMessageA( list[i], WM_NCHITTEST, 0, MAKELONG(pt.x,pt.y) );
 392         if (res != HTTRANSPARENT)
 393         {
 394             *hittest = res;  /* Found the window */
 395             break;
 396         }
 397         /* continue search with next window in z-order */
 398     }
 399     ret = list[i];
 400     HeapFree( GetProcessHeap(), 0, list );
 401     TRACE( "scope %p (%ld,%ld) returning %p\n", hwndScope, pt.x, pt.y, ret );
 402     return ret;
 403 }
 404
 405
 406 /*******************************************************************
 407  *              WindowFromPoint (USER32.@)
 408  */
 409 HWND WINAPI WindowFromPoint( POINT pt )
 410 {
 411     INT hittest;
 412     return WINPOS_WindowFromPoint( 0, pt, &hittest );
 413 }
 414
 415
 416 /*******************************************************************
 417  *              ChildWindowFromPoint (USER32.@)
 418  */
 419 HWND WINAPI ChildWindowFromPoint( HWND hwndParent, POINT pt )
 420 {
 421     return ChildWindowFromPointEx( hwndParent, pt, CWP_ALL );
 422 }
 423
 424 /*******************************************************************
 425  *              ChildWindowFromPointEx (USER32.@)
 426  */
 427 HWND WINAPI ChildWindowFromPointEx( HWND hwndParent, POINT pt, UINT uFlags)
 428 {
 429     /* pt is in the client coordinates */
 430     HWND *list;
 431     int i;
 432     RECT rect;
 433     HWND retvalue;
 434
 435     GetClientRect( hwndParent, &rect );
 436     if (!PtInRect( &rect, pt )) return 0;
 437     if (!(list = WIN_ListChildren( hwndParent ))) return hwndParent;
 438
 439     for (i = 0; list[i]; i++)
 440     {
 441         if (!WIN_GetRectangles( list[i], &rect, NULL )) continue;
 442         if (!PtInRect( &rect, pt )) continue;
 443         if (uFlags & (CWP_SKIPINVISIBLE|CWP_SKIPDISABLED))
 444         {
 445             LONG style = GetWindowLongW( list[i], GWL_STYLE );
 446             if ((uFlags & CWP_SKIPINVISIBLE) && !(style & WS_VISIBLE)) continue;
 447             if ((uFlags & CWP_SKIPDISABLED) && (style & WS_DISABLED)) continue;
 448         }
 449         if (uFlags & CWP_SKIPTRANSPARENT)
 450         {
 451             if (GetWindowLongW( list[i], GWL_EXSTYLE ) & WS_EX_TRANSPARENT) continue;
 452         }
 453         break;
 454     }
 455     retvalue = list[i];
 456     HeapFree( GetProcessHeap(), 0, list );
 457     if (!retvalue) retvalue = hwndParent;
 458     return retvalue;
 459 }
 460
 461
 462 /*******************************************************************
 463  *         WINPOS_GetWinOffset
 464  *
 465  * Calculate the offset between the origin of the two windows. Used
 466  * to implement MapWindowPoints.
 467  */
 468 static void WINPOS_GetWinOffset( HWND hwndFrom, HWND hwndTo, POINT *offset )
 469 {
 470     WND * wndPtr;
 471
 472     offset->x = offset->y = 0;
 473
 474     /* Translate source window origin to screen coords */
 475     if (hwndFrom)
 476     {
 477         HWND hwnd = hwndFrom;
 478
 479         while (hwnd)
 480         {
 481             if (hwnd == hwndTo) return;
 482             if (!(wndPtr = WIN_GetPtr( hwnd )))
 483             {
 484                 ERR( "bad hwndFrom = %p\n", hwnd );
 485                 return;
 486             }
 487             if (wndPtr == WND_DESKTOP) break;
 488             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 489             offset->x += wndPtr->rectClient.left;
 490             offset->y += wndPtr->rectClient.top;
 491             hwnd = wndPtr->parent;
 492             WIN_ReleasePtr( wndPtr );
 493         }
 494     }
 495
 496     /* Translate origin to destination window coords */
 497     if (hwndTo)
 498     {
 499         HWND hwnd = hwndTo;
 500
 501         while (hwnd)
 502         {
 503             if (!(wndPtr = WIN_GetPtr( hwnd )))
 504             {
 505                 ERR( "bad hwndTo = %p\n", hwnd );
 506                 return;
 507             }
 508             if (wndPtr == WND_DESKTOP) break;
 509             if (wndPtr == WND_OTHER_PROCESS) goto other_process;
 510             offset->x -= wndPtr->rectClient.left;
 511             offset->y -= wndPtr->rectClient.top;
 512             hwnd = wndPtr->parent;
 513             WIN_ReleasePtr( wndPtr );
 514         }
 515     }
 516     return;
 517
 518  other_process:  /* one of the parents may belong to another process, do it the hard way */
 519     offset->x = offset->y = 0;
 520     SERVER_START_REQ( get_windows_offset )
 521     {
 522         req->from = hwndFrom;
 523         req->to   = hwndTo;
 524         if (!wine_server_call( req ))
 525         {
 526             offset->x = reply->x;
 527             offset->y = reply->y;
 528         }
 529     }
 530     SERVER_END_REQ;
 531 }
 532
 533
 534 /*******************************************************************
 535  *              MapWindowPoints (USER.258)
 536  */
 537 void WINAPI MapWindowPoints16( HWND16 hwndFrom, HWND16 hwndTo,
 538                                LPPOINT16 lppt, UINT16 count )
 539 {
 540     POINT offset;
 541
 542     WINPOS_GetWinOffset( WIN_Handle32(hwndFrom), WIN_Handle32(hwndTo), &offset );
 543     while (count--)
 544     {
 545         lppt->x += offset.x;
 546         lppt->y += offset.y;
 547         lppt++;
 548     }
 549 }
 550
 551
 552 /*******************************************************************
 553  *              MapWindowPoints (USER32.@)
 554  */
 555 INT WINAPI MapWindowPoints( HWND hwndFrom, HWND hwndTo, LPPOINT lppt, UINT count )
 556 {
 557     POINT offset;
 558
 559     WINPOS_GetWinOffset( hwndFrom, hwndTo, &offset );
 560     while (count--)
 561     {
 562         lppt->x += offset.x;
 563         lppt->y += offset.y;
 564         lppt++;
 565     }
 566     return MAKELONG( LOWORD(offset.x), LOWORD(offset.y) );
 567 }
 568
 569
 570 /***********************************************************************
 571  *              IsIconic (USER32.@)
 572  */
 573 BOOL WINAPI IsIconic(HWND hWnd)
 574 {
 575     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MINIMIZE) != 0;
 576 }
 577
 578
 579 /***********************************************************************
 580  *              IsZoomed (USER32.@)
 581  */
 582 BOOL WINAPI IsZoomed(HWND hWnd)
 583 {
 584     return (GetWindowLongW( hWnd, GWL_STYLE ) & WS_MAXIMIZE) != 0;
 585 }
 586
 587
 588 /*******************************************************************
 589  *              AllowSetForegroundWindow (USER32.@)
 590  */
 591 BOOL WINAPI AllowSetForegroundWindow( DWORD procid )
 592 {
 593     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 594      * implemented, then fix this function. */
 595     return TRUE;
 596 }
 597
 598
 599 /*******************************************************************
 600  *              LockSetForegroundWindow (USER32.@)
 601  */
 602 BOOL WINAPI LockSetForegroundWindow( UINT lockcode )
 603 {
 604     /* FIXME: If Win98/2000 style SetForegroundWindow behavior is
 605      * implemented, then fix this function. */
 606     return TRUE;
 607 }
 608
 609
 610 /***********************************************************************
 611  *              BringWindowToTop (USER32.@)
 612  */
 613 BOOL WINAPI BringWindowToTop( HWND hwnd )
 614 {
 615     return SetWindowPos( hwnd, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE );
 616 }
 617
 618
 619 /***********************************************************************
 620  *              MoveWindow (USER32.@)
 621  */
 622 BOOL WINAPI MoveWindow( HWND hwnd, INT x, INT y, INT cx, INT cy,
 623                             BOOL repaint )
 624 {
 625     int flags = SWP_NOZORDER | SWP_NOACTIVATE;
 626     if (!repaint) flags |= SWP_NOREDRAW;
 627     TRACE("%p %d,%d %dx%d %d\n", hwnd, x, y, cx, cy, repaint );
 628     return SetWindowPos( hwnd, 0, x, y, cx, cy, flags );
 629 }
 630
 631 /***********************************************************************
 632  *           WINPOS_InitInternalPos
 633  */
 634 static LPINTERNALPOS WINPOS_InitInternalPos( WND* wnd )
 635 {
 636     LPINTERNALPOS lpPos = GetPropA( wnd->hwndSelf, atomInternalPos );
 637     if( !lpPos )
 638     {
 639         /* this happens when the window is minimized/maximized
 640          * for the first time (rectWindow is not adjusted yet) */
 641
 642         lpPos = HeapAlloc( GetProcessHeap(), 0, sizeof(INTERNALPOS) );
 643         if( !lpPos ) return NULL;
 644
 645         SetPropA( wnd->hwndSelf, atomInternalPos, (HANDLE)lpPos );
 646         lpPos->hwndIconTitle = 0; /* defer until needs to be shown */
 647         lpPos->rectNormal.left   = wnd->rectWindow.left;
 648         lpPos->rectNormal.top    = wnd->rectWindow.top;
 649         lpPos->rectNormal.right  = wnd->rectWindow.right;
 650         lpPos->rectNormal.bottom = wnd->rectWindow.bottom;
 651         lpPos->ptIconPos.x = lpPos->ptIconPos.y = -1;
 652         lpPos->ptMaxPos.x = lpPos->ptMaxPos.y = -1;
 653     }
 654
 655     if( wnd->dwStyle & WS_MINIMIZE )
 656     {
 657         lpPos->ptIconPos.x = wnd->rectWindow.left;
 658         lpPos->ptIconPos.y = wnd->rectWindow.top;
 659     }
 660     else if( wnd->dwStyle & WS_MAXIMIZE )
 661     {
 662         lpPos->ptMaxPos.x = wnd->rectWindow.left;
 663         lpPos->ptMaxPos.y = wnd->rectWindow.top;
 664     }
 665     else
 666     {
 667         lpPos->rectNormal.left   = wnd->rectWindow.left;
 668         lpPos->rectNormal.top    = wnd->rectWindow.top;
 669         lpPos->rectNormal.right  = wnd->rectWindow.right;
 670         lpPos->rectNormal.bottom = wnd->rectWindow.bottom;
 671     }
 672     return lpPos;
 673 }
 674
 675 /***********************************************************************
 676  *           WINPOS_RedrawIconTitle
 677  */
 678 BOOL WINPOS_RedrawIconTitle( HWND hWnd )
 679 {
 680     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hWnd, atomInternalPos );
 681     if( lpPos )
 682     {
 683         if( lpPos->hwndIconTitle )
 684         {
 685             SendMessageA( lpPos->hwndIconTitle, WM_SHOWWINDOW, TRUE, 0);
 686             InvalidateRect( lpPos->hwndIconTitle, NULL, TRUE );
 687             return TRUE;
 688         }
 689     }
 690     return FALSE;
 691 }
 692
 693 /***********************************************************************
 694  *           WINPOS_ShowIconTitle
 695  */
 696 BOOL WINPOS_ShowIconTitle( HWND hwnd, BOOL bShow )
 697 {
 698     LPINTERNALPOS lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 699
 700     if (lpPos && !GetPropA( hwnd, "__wine_x11_managed" ))
 701     {
 702         HWND title = lpPos->hwndIconTitle;
 703
 704         TRACE("%p %i\n", hwnd, (bShow != 0) );
 705
 706         if( !title )
 707             lpPos->hwndIconTitle = title = ICONTITLE_Create( hwnd );
 708         if( bShow )
 709         {
 710             if (!IsWindowVisible(title))
 711             {
 712                 SendMessageA( title, WM_SHOWWINDOW, TRUE, 0 );
 713                 SetWindowPos( title, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE |
 714                               SWP_NOACTIVATE | SWP_NOZORDER | SWP_SHOWWINDOW );
 715             }
 716         }
 717         else ShowWindow( title, SW_HIDE );
 718     }
 719     return FALSE;
 720 }
 721
 722 /*******************************************************************
 723  *           WINPOS_GetMinMaxInfo
 724  *
 725  * Get the minimized and maximized information for a window.
 726  */
 727 void WINPOS_GetMinMaxInfo( HWND hwnd, POINT *maxSize, POINT *maxPos,
 728                            POINT *minTrack, POINT *maxTrack )
 729 {
 730     LPINTERNALPOS lpPos;
 731     MINMAXINFO MinMax;
 732     INT xinc, yinc;
 733     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 734     LONG exstyle = GetWindowLongA( hwnd, GWL_EXSTYLE );
 735     RECT rc;
 736
 737     /* Compute default values */
 738
 739     GetWindowRect(hwnd, &rc);
 740     MinMax.ptReserved.x = rc.left;
 741     MinMax.ptReserved.y = rc.top;
 742
 743     if (style & WS_CHILD)
 744     {
 745         if ((style & WS_CAPTION) == WS_CAPTION)
 746             style &= ~WS_BORDER; /* WS_CAPTION = WS_DLGFRAME | WS_BORDER */
 747
 748         GetClientRect(GetAncestor(hwnd,GA_PARENT), &rc);
 749         AdjustWindowRectEx(&rc, style, ((style & WS_POPUP) && GetMenu(hwnd)), exstyle);
 750
 751         /* avoid calculating this twice */
 752         style &= ~(WS_DLGFRAME | WS_BORDER | WS_THICKFRAME);
 753
 754         MinMax.ptMaxSize.x = rc.right - rc.left;
 755         MinMax.ptMaxSize.y = rc.bottom - rc.top;
 756     }
 757     else
 758     {
 759         MinMax.ptMaxSize.x = GetSystemMetrics(SM_CXSCREEN);
 760         MinMax.ptMaxSize.y = GetSystemMetrics(SM_CYSCREEN);
 761     }
 762     MinMax.ptMinTrackSize.x = GetSystemMetrics(SM_CXMINTRACK);
 763     MinMax.ptMinTrackSize.y = GetSystemMetrics(SM_CYMINTRACK);
 764     MinMax.ptMaxTrackSize.x = GetSystemMetrics(SM_CXSCREEN) + 2*GetSystemMetrics(SM_CXFRAME);
 765     MinMax.ptMaxTrackSize.y = GetSystemMetrics(SM_CYSCREEN) + 2*GetSystemMetrics(SM_CYFRAME);
 766
 767     if (HAS_DLGFRAME( style, exstyle ))
 768     {
 769         xinc = GetSystemMetrics(SM_CXDLGFRAME);
 770         yinc = GetSystemMetrics(SM_CYDLGFRAME);
 771     }
 772     else
 773     {
 774         xinc = yinc = 0;
 775         if (HAS_THICKFRAME(style))
 776         {
 777             xinc += GetSystemMetrics(SM_CXFRAME);
 778             yinc += GetSystemMetrics(SM_CYFRAME);
 779         }
 780         if (style & WS_BORDER)
 781         {
 782             xinc += GetSystemMetrics(SM_CXBORDER);
 783             yinc += GetSystemMetrics(SM_CYBORDER);
 784         }
 785     }
 786     MinMax.ptMaxSize.x += 2 * xinc;
 787     MinMax.ptMaxSize.y += 2 * yinc;
 788
 789     lpPos = (LPINTERNALPOS)GetPropA( hwnd, atomInternalPos );
 790     if( lpPos && !EMPTYPOINT(lpPos->ptMaxPos) )
 791     {
 792         MinMax.ptMaxPosition.x = lpPos->ptMaxPos.x;
 793         MinMax.ptMaxPosition.y = lpPos->ptMaxPos.y;
 794     }
 795     else
 796     {
 797         MinMax.ptMaxPosition.x = -xinc;
 798         MinMax.ptMaxPosition.y = -yinc;
 799     }
 800
 801     SendMessageA( hwnd, WM_GETMINMAXINFO, 0, (LPARAM)&MinMax );
 802
 803       /* Some sanity checks */
 804
 805     TRACE("%ld %ld / %ld %ld / %ld %ld / %ld %ld\n",
 806                       MinMax.ptMaxSize.x, MinMax.ptMaxSize.y,
 807                       MinMax.ptMaxPosition.x, MinMax.ptMaxPosition.y,
 808                       MinMax.ptMaxTrackSize.x, MinMax.ptMaxTrackSize.y,
 809                       MinMax.ptMinTrackSize.x, MinMax.ptMinTrackSize.y);
 810     MinMax.ptMaxTrackSize.x = max( MinMax.ptMaxTrackSize.x,
 811                                    MinMax.ptMinTrackSize.x );
 812     MinMax.ptMaxTrackSize.y = max( MinMax.ptMaxTrackSize.y,
 813                                    MinMax.ptMinTrackSize.y );
 814
 815     if (maxSize) *maxSize = MinMax.ptMaxSize;
 816     if (maxPos) *maxPos = MinMax.ptMaxPosition;
 817     if (minTrack) *minTrack = MinMax.ptMinTrackSize;
 818     if (maxTrack) *maxTrack = MinMax.ptMaxTrackSize;
 819 }
 820
 821 /***********************************************************************
 822  *              ShowWindowAsync (USER32.@)
 823  *
 824  * doesn't wait; returns immediately.
 825  * used by threads to toggle windows in other (possibly hanging) threads
 826  */
 827 BOOL WINAPI ShowWindowAsync( HWND hwnd, INT cmd )
 828 {
 829     HWND full_handle;
 830
 831     if (is_broadcast(hwnd))
 832     {
 833         SetLastError( ERROR_INVALID_PARAMETER );
 834         return FALSE;
 835     }
 836
 837     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 838     {
 839         if (USER_Driver.pShowWindow)
 840             return USER_Driver.pShowWindow( full_handle, cmd );
 841         return FALSE;
 842     }
 843     return SendNotifyMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 844 }
 845
 846
 847 /***********************************************************************
 848  *              ShowWindow (USER32.@)
 849  */
 850 BOOL WINAPI ShowWindow( HWND hwnd, INT cmd )
 851 {
 852     HWND full_handle;
 853
 854     if (is_broadcast(hwnd))
 855     {
 856         SetLastError( ERROR_INVALID_PARAMETER );
 857         return FALSE;
 858     }
 859     if ((full_handle = WIN_IsCurrentThread( hwnd )))
 860     {
 861         if (USER_Driver.pShowWindow)
 862             return USER_Driver.pShowWindow( full_handle, cmd );
 863         return FALSE;
 864     }
 865     return SendMessageW( hwnd, WM_WINE_SHOWWINDOW, cmd, 0 );
 866 }
 867
 868
 869 /***********************************************************************
 870  *              GetInternalWindowPos (USER32.@)
 871  */
 872 UINT WINAPI GetInternalWindowPos( HWND hwnd, LPRECT rectWnd,
 873                                       LPPOINT ptIcon )
 874 {
 875     WINDOWPLACEMENT wndpl;
 876     if (GetWindowPlacement( hwnd, &wndpl ))
 877     {
 878         if (rectWnd) *rectWnd = wndpl.rcNormalPosition;
 879         if (ptIcon)  *ptIcon = wndpl.ptMinPosition;
 880         return wndpl.showCmd;
 881     }
 882     return 0;
 883 }
 884
 885
 886 /***********************************************************************
 887  *              GetWindowPlacement (USER32.@)
 888  *
 889  * Win95:
 890  * Fails if wndpl->length of Win95 (!) apps is invalid.
 891  */
 892 BOOL WINAPI GetWindowPlacement( HWND hwnd, WINDOWPLACEMENT *wndpl )
 893 {
 894     WND *pWnd = WIN_GetPtr( hwnd );
 895     LPINTERNALPOS lpPos;
 896
 897     if (!pWnd || pWnd == WND_DESKTOP) return FALSE;
 898     if (pWnd == WND_OTHER_PROCESS)
 899     {
 900         if (IsWindow( hwnd )) FIXME( "not supported on other process window %p\n", hwnd );
 901         return FALSE;
 902     }
 903
 904     lpPos = WINPOS_InitInternalPos( pWnd );
 905     wndpl->length  = sizeof(*wndpl);
 906     if( pWnd->dwStyle & WS_MINIMIZE )
 907         wndpl->showCmd = SW_SHOWMINIMIZED;
 908     else
 909         wndpl->showCmd = ( pWnd->dwStyle & WS_MAXIMIZE ) ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL ;
 910     if( pWnd->flags & WIN_RESTORE_MAX )
 911         wndpl->flags = WPF_RESTORETOMAXIMIZED;
 912     else
 913         wndpl->flags = 0;
 914     wndpl->ptMinPosition.x = lpPos->ptIconPos.x;
 915     wndpl->ptMinPosition.y = lpPos->ptIconPos.y;
 916     wndpl->ptMaxPosition.x = lpPos->ptMaxPos.x;
 917     wndpl->ptMaxPosition.y = lpPos->ptMaxPos.y;
 918     wndpl->rcNormalPosition.left   = lpPos->rectNormal.left;
 919     wndpl->rcNormalPosition.top    = lpPos->rectNormal.top;
 920     wndpl->rcNormalPosition.right  = lpPos->rectNormal.right;
 921     wndpl->rcNormalPosition.bottom = lpPos->rectNormal.bottom;
 922     WIN_ReleasePtr( pWnd );
 923     return TRUE;
 924 }
 925
 926
 927 /***********************************************************************
 928  *           WINPOS_SetPlacement
 929  */
 930 static BOOL WINPOS_SetPlacement( HWND hwnd, const WINDOWPLACEMENT *wndpl, UINT flags )
 931 {
 932     LPINTERNALPOS lpPos;
 933     DWORD style;
 934     WND *pWnd = WIN_GetPtr( hwnd );
 935
 936     if (!pWnd || pWnd == WND_OTHER_PROCESS || pWnd == WND_DESKTOP) return FALSE;
 937     lpPos = WINPOS_InitInternalPos( pWnd );
 938
 939     if( flags & PLACE_MIN )
 940     {
 941         lpPos->ptIconPos.x = wndpl->ptMinPosition.x;
 942         lpPos->ptIconPos.y = wndpl->ptMinPosition.y;
 943     }
 944     if( flags & PLACE_MAX )
 945     {
 946         lpPos->ptMaxPos.x = wndpl->ptMaxPosition.x;
 947         lpPos->ptMaxPos.y = wndpl->ptMaxPosition.y;
 948     }
 949     if( flags & PLACE_RECT)
 950     {
 951         lpPos->rectNormal.left   = wndpl->rcNormalPosition.left;
 952         lpPos->rectNormal.top    = wndpl->rcNormalPosition.top;
 953         lpPos->rectNormal.right  = wndpl->rcNormalPosition.right;
 954         lpPos->rectNormal.bottom = wndpl->rcNormalPosition.bottom;
 955     }
 956
 957     style = pWnd->dwStyle;
 958     WIN_ReleasePtr( pWnd );
 959
 960     if( style & WS_MINIMIZE )
 961     {
 962         WINPOS_ShowIconTitle( hwnd, FALSE );
 963         if( wndpl->flags & WPF_SETMINPOSITION && !EMPTYPOINT(lpPos->ptIconPos))
 964             SetWindowPos( hwnd, 0, lpPos->ptIconPos.x, lpPos->ptIconPos.y,
 965                           0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 966     }
 967     else if( style & WS_MAXIMIZE )
 968     {
 969         if( !EMPTYPOINT(lpPos->ptMaxPos) )
 970             SetWindowPos( hwnd, 0, lpPos->ptMaxPos.x, lpPos->ptMaxPos.y,
 971                           0, 0, SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE );
 972     }
 973     else if( flags & PLACE_RECT )
 974         SetWindowPos( hwnd, 0, lpPos->rectNormal.left, lpPos->rectNormal.top,
 975                       lpPos->rectNormal.right - lpPos->rectNormal.left,
 976                       lpPos->rectNormal.bottom - lpPos->rectNormal.top,
 977                       SWP_NOZORDER | SWP_NOACTIVATE );
 978
 979     ShowWindow( hwnd, wndpl->showCmd );
 980
 981     if (IsIconic( hwnd ))
 982     {
 983         if (GetWindowLongW( hwnd, GWL_STYLE ) & WS_VISIBLE) WINPOS_ShowIconTitle( hwnd, TRUE );
 984
 985         /* SDK: ...valid only the next time... */
 986         if( wndpl->flags & WPF_RESTORETOMAXIMIZED )
 987         {
 988             pWnd = WIN_GetPtr( hwnd );
 989             if (pWnd && pWnd != WND_OTHER_PROCESS)
 990             {
 991                 pWnd->flags |= WIN_RESTORE_MAX;
 992                 WIN_ReleasePtr( pWnd );
 993             }
 994         }
 995     }
 996     return TRUE;
 997 }
 998
 999
1000 /***********************************************************************
1001  *              SetWindowPlacement (USER32.@)
1002  *
1003  * Win95:
1004  * Fails if wndpl->length of Win95 (!) apps is invalid.
1005  */
1006 BOOL WINAPI SetWindowPlacement( HWND hwnd, const WINDOWPLACEMENT *wpl )
1007 {
1008     if (!wpl) return FALSE;
1009     return WINPOS_SetPlacement( hwnd, wpl, PLACE_MIN | PLACE_MAX | PLACE_RECT );
1010 }
1011
1012
1013 /***********************************************************************
1014  *              AnimateWindow (USER32.@)
1015  *              Shows/Hides a window with an animation
1016  *              NO ANIMATION YET
1017  */
1018 BOOL WINAPI AnimateWindow(HWND hwnd, DWORD dwTime, DWORD dwFlags)
1019 {
1020         FIXME("partial stub\n");
1021
1022         /* If trying to show/hide and it's already   *
1023          * shown/hidden or invalid window, fail with *
1024          * invalid parameter                         */
1025         if(!IsWindow(hwnd) ||
1026            (IsWindowVisible(hwnd) && !(dwFlags & AW_HIDE)) ||
1027            (!IsWindowVisible(hwnd) && (dwFlags & AW_HIDE)))
1028         {
1029                 SetLastError(ERROR_INVALID_PARAMETER);
1030                 return FALSE;
1031         }
1032
1033         ShowWindow(hwnd, (dwFlags & AW_HIDE) ? SW_HIDE : ((dwFlags & AW_ACTIVATE) ? SW_SHOW : SW_SHOWNA));
1034
1035         return TRUE;
1036 }
1037
1038 /***********************************************************************
1039  *              SetInternalWindowPos (USER32.@)
1040  */
1041 void WINAPI SetInternalWindowPos( HWND hwnd, UINT showCmd,
1042                                     LPRECT rect, LPPOINT pt )
1043 {
1044     if( IsWindow(hwnd) )
1045     {
1046         WINDOWPLACEMENT wndpl;
1047         UINT flags;
1048
1049         wndpl.length  = sizeof(wndpl);
1050         wndpl.showCmd = showCmd;
1051         wndpl.flags = flags = 0;
1052
1053         if( pt )
1054         {
1055             flags |= PLACE_MIN;
1056             wndpl.flags |= WPF_SETMINPOSITION;
1057             wndpl.ptMinPosition = *pt;
1058         }
1059         if( rect )
1060         {
1061             flags |= PLACE_RECT;
1062             wndpl.rcNormalPosition = *rect;
1063         }
1064         WINPOS_SetPlacement( hwnd, &wndpl, flags );
1065     }
1066 }
1067
1068
1069 /*******************************************************************
1070  *         can_activate_window
1071  *
1072  * Check if we can activate the specified window.
1073  */
1074 static BOOL can_activate_window( HWND hwnd )
1075 {
1076     LONG style;
1077
1078     if (!hwnd) return FALSE;
1079     style = GetWindowLongW( hwnd, GWL_STYLE );
1080     if (!(style & WS_VISIBLE)) return FALSE;
1081     if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return FALSE;
1082     return !(style & WS_DISABLED);
1083 }
1084
1085
1086 /*******************************************************************
1087  *         WINPOS_ActivateOtherWindow
1088  *
1089  *  Activates window other than pWnd.
1090  */
1091 void WINPOS_ActivateOtherWindow(HWND hwnd)
1092 {
1093     HWND hwndTo, fg;
1094
1095     if ((GetWindowLongW( hwnd, GWL_STYLE ) & WS_POPUP) && (hwndTo = GetWindow( hwnd, GW_OWNER )))
1096     {
1097         hwndTo = GetAncestor( hwndTo, GA_ROOT );
1098         if (can_activate_window( hwndTo )) goto done;
1099     }
1100
1101     hwndTo = hwnd;
1102     for (;;)
1103     {
1104         if (!(hwndTo = GetWindow( hwndTo, GW_HWNDNEXT ))) break;
1105         if (can_activate_window( hwndTo )) break;
1106     }
1107
1108  done:
1109     fg = GetForegroundWindow();
1110     TRACE("win = %p fg = %p\n", hwndTo, fg);
1111     if (!fg || (hwnd == fg))
1112     {
1113         if (SetForegroundWindow( hwndTo )) return;
1114     }
1115     if (!SetActiveWindow( hwndTo )) SetActiveWindow(0);
1116 }
1117
1118
1119 /***********************************************************************
1120  *           WINPOS_HandleWindowPosChanging
1121  *
1122  * Default handling for a WM_WINDOWPOSCHANGING. Called from DefWindowProc().
1123  */
1124 LONG WINPOS_HandleWindowPosChanging( HWND hwnd, WINDOWPOS *winpos )
1125 {
1126     POINT minTrack, maxTrack;
1127     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1128
1129     if (winpos->flags & SWP_NOSIZE) return 0;
1130     if ((style & WS_THICKFRAME) || ((style & (WS_POPUP | WS_CHILD)) == 0))
1131     {
1132         WINPOS_GetMinMaxInfo( hwnd, NULL, NULL, &minTrack, &maxTrack );
1133         if (winpos->cx > maxTrack.x) winpos->cx = maxTrack.x;
1134         if (winpos->cy > maxTrack.y) winpos->cy = maxTrack.y;
1135         if (!(style & WS_MINIMIZE))
1136         {
1137             if (winpos->cx < minTrack.x ) winpos->cx = minTrack.x;
1138             if (winpos->cy < minTrack.y ) winpos->cy = minTrack.y;
1139         }
1140     }
1141     return 0;
1142 }
1143
1144
1145 /***********************************************************************
1146  *           dump_winpos_flags
1147  */
1148 static void dump_winpos_flags(UINT flags)
1149 {
1150     TRACE("flags:");
1151     if(flags & SWP_NOSIZE) TRACE(" SWP_NOSIZE");
1152     if(flags & SWP_NOMOVE) TRACE(" SWP_NOMOVE");
1153     if(flags & SWP_NOZORDER) TRACE(" SWP_NOZORDER");
1154     if(flags & SWP_NOREDRAW) TRACE(" SWP_NOREDRAW");
1155     if(flags & SWP_NOACTIVATE) TRACE(" SWP_NOACTIVATE");
1156     if(flags & SWP_FRAMECHANGED) TRACE(" SWP_FRAMECHANGED");
1157     if(flags & SWP_SHOWWINDOW) TRACE(" SWP_SHOWWINDOW");
1158     if(flags & SWP_HIDEWINDOW) TRACE(" SWP_HIDEWINDOW");
1159     if(flags & SWP_NOCOPYBITS) TRACE(" SWP_NOCOPYBITS");
1160     if(flags & SWP_NOOWNERZORDER) TRACE(" SWP_NOOWNERZORDER");
1161     if(flags & SWP_NOSENDCHANGING) TRACE(" SWP_NOSENDCHANGING");
1162     if(flags & SWP_DEFERERASE) TRACE(" SWP_DEFERERASE");
1163     if(flags & SWP_ASYNCWINDOWPOS) TRACE(" SWP_ASYNCWINDOWPOS");
1164
1165 #define DUMPED_FLAGS \
1166     (SWP_NOSIZE | \
1167     SWP_NOMOVE | \
1168     SWP_NOZORDER | \
1169     SWP_NOREDRAW | \
1170     SWP_NOACTIVATE | \
1171     SWP_FRAMECHANGED | \
1172     SWP_SHOWWINDOW | \
1173     SWP_HIDEWINDOW | \
1174     SWP_NOCOPYBITS | \
1175     SWP_NOOWNERZORDER | \
1176     SWP_NOSENDCHANGING | \
1177     SWP_DEFERERASE | \
1178     SWP_ASYNCWINDOWPOS)
1179
1180     if(flags & ~DUMPED_FLAGS) TRACE(" %08x", flags & ~DUMPED_FLAGS);
1181     TRACE("\n");
1182 #undef DUMPED_FLAGS
1183 }
1184
1185 /***********************************************************************
1186  *              SetWindowPos (USER32.@)
1187  */
1188 BOOL WINAPI SetWindowPos( HWND hwnd, HWND hwndInsertAfter,
1189                           INT x, INT y, INT cx, INT cy, UINT flags )
1190 {
1191     WINDOWPOS winpos;
1192
1193     TRACE("hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1194           hwnd, hwndInsertAfter, x, y, cx, cy, flags);
1195     if(TRACE_ON(win)) dump_winpos_flags(flags);
1196
1197     if (is_broadcast(hwnd))
1198     {
1199         SetLastError( ERROR_INVALID_PARAMETER );
1200         return FALSE;
1201     }
1202
1203     winpos.hwnd = WIN_GetFullHandle(hwnd);
1204     winpos.hwndInsertAfter = WIN_GetFullHandle(hwndInsertAfter);
1205     winpos.x = x;
1206     winpos.y = y;
1207     winpos.cx = cx;
1208     winpos.cy = cy;
1209     winpos.flags = flags;
1210     if (WIN_IsCurrentThread( hwnd ))
1211     {
1212         if (USER_Driver.pSetWindowPos)
1213             return USER_Driver.pSetWindowPos( &winpos );
1214         return FALSE;
1215     }
1216     return SendMessageW( winpos.hwnd, WM_WINE_SETWINDOWPOS, 0, (LPARAM)&winpos );
1217 }
1218
1219
1220 /***********************************************************************
1221  *              BeginDeferWindowPos (USER32.@)
1222  */
1223 HDWP WINAPI BeginDeferWindowPos( INT count )
1224 {
1225     HDWP handle;
1226     DWP *pDWP;
1227
1228     TRACE("%d\n", count);
1229
1230     if (count < 0)
1231     {
1232         SetLastError(ERROR_INVALID_PARAMETER);
1233         return 0;
1234     }
1235     /* Windows allows zero count, in which case it allocates context for 8 moves */
1236     if (count == 0) count = 8;
1237
1238     handle = USER_HEAP_ALLOC( sizeof(DWP) + (count-1)*sizeof(WINDOWPOS) );
1239     if (!handle) return 0;
1240     pDWP = (DWP *) USER_HEAP_LIN_ADDR( handle );
1241     pDWP->actualCount    = 0;
1242     pDWP->suggestedCount = count;
1243     pDWP->valid          = TRUE;
1244     pDWP->wMagic         = DWP_MAGIC;
1245     pDWP->hwndParent     = 0;
1246
1247     TRACE("returning hdwp %p\n", handle);
1248     return handle;
1249 }
1250
1251
1252 /***********************************************************************
1253  *              DeferWindowPos (USER32.@)
1254  */
1255 HDWP WINAPI DeferWindowPos( HDWP hdwp, HWND hwnd, HWND hwndAfter,
1256                                 INT x, INT y, INT cx, INT cy,
1257                                 UINT flags )
1258 {
1259     DWP *pDWP;
1260     int i;
1261     HDWP newhdwp = hdwp,retvalue;
1262
1263     TRACE("hdwp %p, hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
1264           hdwp, hwnd, hwndAfter, x, y, cx, cy, flags);
1265
1266     hwnd = WIN_GetFullHandle( hwnd );
1267     if (hwnd == GetDesktopWindow()) return 0;
1268
1269     if (!(pDWP = USER_HEAP_LIN_ADDR( hdwp ))) return 0;
1270
1271     USER_Lock();
1272
1273     for (i = 0; i < pDWP->actualCount; i++)
1274     {
1275         if (pDWP->winPos[i].hwnd == hwnd)
1276         {
1277               /* Merge with the other changes */
1278             if (!(flags & SWP_NOZORDER))
1279             {
1280                 pDWP->winPos[i].hwndInsertAfter = WIN_GetFullHandle(hwndAfter);
1281             }
1282             if (!(flags & SWP_NOMOVE))
1283             {
1284                 pDWP->winPos[i].x = x;
1285                 pDWP->winPos[i].y = y;
1286             }
1287             if (!(flags & SWP_NOSIZE))
1288             {
1289                 pDWP->winPos[i].cx = cx;
1290                 pDWP->winPos[i].cy = cy;
1291             }
1292             pDWP->winPos[i].flags &= flags | ~(SWP_NOSIZE | SWP_NOMOVE |
1293                                                SWP_NOZORDER | SWP_NOREDRAW |
1294                                                SWP_NOACTIVATE | SWP_NOCOPYBITS|
1295                                                SWP_NOOWNERZORDER);
1296             pDWP->winPos[i].flags |= flags & (SWP_SHOWWINDOW | SWP_HIDEWINDOW |
1297                                               SWP_FRAMECHANGED);
1298             retvalue = hdwp;
1299             goto END;
1300         }
1301     }
1302     if (pDWP->actualCount >= pDWP->suggestedCount)
1303     {
1304         newhdwp = USER_HEAP_REALLOC( hdwp,
1305                       sizeof(DWP) + pDWP->suggestedCount*sizeof(WINDOWPOS) );
1306         if (!newhdwp)
1307         {
1308             retvalue = 0;
1309             goto END;
1310         }
1311         pDWP = (DWP *) USER_HEAP_LIN_ADDR( newhdwp );
1312         pDWP->suggestedCount++;
1313     }
1314     pDWP->winPos[pDWP->actualCount].hwnd = hwnd;
1315     pDWP->winPos[pDWP->actualCount].hwndInsertAfter = hwndAfter;
1316     pDWP->winPos[pDWP->actualCount].x = x;
1317     pDWP->winPos[pDWP->actualCount].y = y;
1318     pDWP->winPos[pDWP->actualCount].cx = cx;
1319     pDWP->winPos[pDWP->actualCount].cy = cy;
1320     pDWP->winPos[pDWP->actualCount].flags = flags;
1321     pDWP->actualCount++;
1322     retvalue = newhdwp;
1323 END:
1324     USER_Unlock();
1325     return retvalue;
1326 }
1327
1328
1329 /***********************************************************************
1330  *              EndDeferWindowPos (USER32.@)
1331  */
1332 BOOL WINAPI EndDeferWindowPos( HDWP hdwp )
1333 {
1334     DWP *pDWP;
1335     WINDOWPOS *winpos;
1336     BOOL res = TRUE;
1337     int i;
1338
1339     TRACE("%p\n", hdwp);
1340
1341     pDWP = (DWP *) USER_HEAP_LIN_ADDR( hdwp );
1342     if (!pDWP) return FALSE;
1343     for (i = 0, winpos = pDWP->winPos; i < pDWP->actualCount; i++, winpos++)
1344     {
1345         if (!USER_Driver.pSetWindowPos || !(res = USER_Driver.pSetWindowPos( winpos ))) break;
1346     }
1347     USER_HEAP_FREE( hdwp );
1348     return res;
1349 }
1350
1351
1352 /***********************************************************************
1353  *              TileChildWindows (USER.199)
1354  */
1355 void WINAPI TileChildWindows16( HWND16 parent, WORD action )
1356 {
1357     FIXME("(%04x, %d): stub\n", parent, action);
1358 }
1359
1360 /***********************************************************************
1361  *              CascadeChildWindows (USER.198)
1362  */
1363 void WINAPI CascadeChildWindows16( HWND16 parent, WORD action )
1364 {
1365     FIXME("(%04x, %d): stub\n", parent, action);
1366 }