| /* |
| * Scroll windows and DCs |
| * |
| * Copyright 1993 David W. Metcalfe |
| * Copyright 1995, 1996 Alex Korobka |
| * Copyright 2001 Alexandre Julliard |
| */ |
| |
| #include "config.h" |
| |
| #include "ts_xlib.h" |
| #include "ts_xutil.h" |
| |
| #include "winbase.h" |
| #include "wingdi.h" |
| #include "winuser.h" |
| |
| #include "x11drv.h" |
| #include "win.h" |
| #include "debugtools.h" |
| |
| DEFAULT_DEBUG_CHANNEL(x11drv); |
| |
| |
| /************************************************************************* |
| * fix_caret |
| */ |
| static BOOL fix_caret(HWND hWnd, LPRECT lprc, UINT flags) |
| { |
| HWND hCaret = CARET_GetHwnd(); |
| |
| if( hCaret ) |
| { |
| RECT rc; |
| CARET_GetRect( &rc ); |
| if( hCaret == hWnd || |
| (flags & SW_SCROLLCHILDREN && IsChild(hWnd, hCaret)) ) |
| { |
| POINT pt; |
| pt.x = rc.left; |
| pt.y = rc.top; |
| MapWindowPoints( hCaret, hWnd, (LPPOINT)&rc, 2 ); |
| if( IntersectRect(lprc, lprc, &rc) ) |
| { |
| HideCaret(0); |
| lprc->left = pt.x; |
| lprc->top = pt.y; |
| return TRUE; |
| } |
| } |
| } |
| return FALSE; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollDC (X11DRV.@) |
| * |
| * Only the hrgnUpdate is returned in device coordinates. |
| * rcUpdate must be returned in logical coordinates to comply with win API. |
| * FIXME: the doc explicitly states the opposite, to be checked |
| */ |
| BOOL X11DRV_ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc, |
| const RECT *clipRect, HRGN hrgnUpdate, LPRECT rcUpdate ) |
| { |
| RECT rect, rClip, rSrc; |
| |
| TRACE( "%04x %d,%d hrgnUpdate=%04x rcUpdate = %p\n", hdc, dx, dy, hrgnUpdate, rcUpdate ); |
| if (clipRect) TRACE( "cliprc = (%d,%d,%d,%d)\n", |
| clipRect->left, clipRect->top, clipRect->right, clipRect->bottom ); |
| if (rc) TRACE( "rc = (%d,%d,%d,%d)\n", rc->left, rc->top, rc->right, rc->bottom ); |
| |
| /* compute device clipping region (in device coordinates) */ |
| |
| if (rc) rect = *rc; |
| else GetClipBox( hdc, &rect ); |
| |
| if (clipRect) |
| { |
| rClip = *clipRect; |
| IntersectRect( &rClip, &rect, &rClip ); |
| } |
| else rClip = rect; |
| |
| rSrc = rClip; |
| OffsetRect( &rSrc, -dx, -dy ); |
| IntersectRect( &rSrc, &rSrc, &rect ); |
| |
| if (!IsRectEmpty(&rSrc)) |
| { |
| /* copy bits */ |
| if (!BitBlt( hdc, rSrc.left + dx, rSrc.top + dy, |
| rSrc.right - rSrc.left, rSrc.bottom - rSrc.top, |
| hdc, rSrc.left, rSrc.top, SRCCOPY)) |
| return FALSE; |
| } |
| |
| /* compute update areas */ |
| |
| if (hrgnUpdate || rcUpdate) |
| { |
| HRGN hrgn = hrgnUpdate, hrgn2; |
| POINT pt; |
| |
| /* map everything to device coordinates */ |
| pt.x = rect.left + dx; |
| pt.y = rect.top + dy; |
| LPtoDP( hdc, &pt, 1 ); |
| LPtoDP( hdc, (LPPOINT)&rect, 2 ); |
| LPtoDP( hdc, (LPPOINT)&rClip, 2 ); |
| dx = pt.x - rect.left; |
| dy = pt.y - rect.top; |
| |
| hrgn2 = CreateRectRgnIndirect( &rect ); |
| if (hrgn) SetRectRgn( hrgn, rClip.left, rClip.top, rClip.right, rClip.bottom ); |
| else hrgn = CreateRectRgn( rClip.left, rClip.top, rClip.right, rClip.bottom ); |
| CombineRgn( hrgn, hrgn, hrgn2, RGN_AND ); |
| OffsetRgn( hrgn2, dx, dy ); |
| CombineRgn( hrgn, hrgn, hrgn2, RGN_DIFF ); |
| |
| if( rcUpdate ) |
| { |
| GetRgnBox( hrgn, rcUpdate ); |
| |
| /* Put the rcUpdate in logical coordinate */ |
| DPtoLP( hdc, (LPPOINT)rcUpdate, 2 ); |
| } |
| if (!hrgnUpdate) DeleteObject( hrgn ); |
| DeleteObject( hrgn2 ); |
| } |
| return TRUE; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollWindowEx (X11DRV.@) |
| */ |
| INT X11DRV_ScrollWindowEx( HWND hwnd, INT dx, INT dy, |
| const RECT *rect, const RECT *clipRect, |
| HRGN hrgnUpdate, LPRECT rcUpdate, UINT flags ) |
| { |
| INT retVal = NULLREGION; |
| BOOL bCaret = FALSE, bOwnRgn = TRUE; |
| RECT rc, cliprc; |
| |
| if (!WIN_IsWindowDrawable( hwnd, TRUE )) return ERROR; |
| hwnd = WIN_GetFullHandle( hwnd ); |
| |
| GetClientRect(hwnd, &rc); |
| if (rect) IntersectRect(&rc, &rc, rect); |
| |
| if (clipRect) IntersectRect(&cliprc,&rc,clipRect); |
| else cliprc = rc; |
| |
| if (!IsRectEmpty(&cliprc) && (dx || dy)) |
| { |
| HDC hDC; |
| BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE)); |
| HRGN hrgnClip = CreateRectRgnIndirect(&cliprc); |
| HRGN hrgnTemp; |
| RECT caretrc; |
| |
| TRACE( "%04x, %d,%d hrgnUpdate=%04x rcUpdate = %p rc=(%d,%d-%d,%d) %04x\n", |
| hwnd, dx, dy, hrgnUpdate, rcUpdate, |
| rc.left, rc.top, rc.right, rc.bottom, flags ); |
| if (clipRect) TRACE( "cliprc = (%d,%d,%d,%d)\n", |
| clipRect->left, clipRect->top, |
| clipRect->right, clipRect->bottom ); |
| |
| caretrc = rc; |
| bCaret = fix_caret(hwnd, &caretrc, flags); |
| |
| if( hrgnUpdate ) bOwnRgn = FALSE; |
| else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 ); |
| |
| hDC = GetDCEx( hwnd, 0, DCX_CACHE | DCX_USESTYLE ); |
| if (hDC) |
| { |
| HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 ); |
| X11DRV_StartGraphicsExposures( hDC ); |
| X11DRV_ScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate ); |
| X11DRV_EndGraphicsExposures( hDC, hrgn ); |
| ReleaseDC( hwnd, hDC ); |
| if (bUpdate) CombineRgn( hrgnUpdate, hrgnUpdate, hrgn, RGN_OR ); |
| else RedrawWindow( hwnd, NULL, hrgn, RDW_INVALIDATE | RDW_ERASE ); |
| DeleteObject( hrgn ); |
| } |
| |
| /* Take into account the fact that some damages may have occured during the scroll */ |
| hrgnTemp = CreateRectRgn( 0, 0, 0, 0 ); |
| if (GetUpdateRgn( hwnd, hrgnTemp, FALSE ) != NULLREGION) |
| { |
| OffsetRgn( hrgnTemp, dx, dy ); |
| CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND ); |
| RedrawWindow( hwnd, NULL, hrgnTemp, RDW_INVALIDATE | RDW_ERASE ); |
| } |
| DeleteObject( hrgnTemp ); |
| |
| if( flags & SW_SCROLLCHILDREN ) |
| { |
| HWND *list = WIN_ListChildren( hwnd ); |
| |
| if (list) |
| { |
| int i; |
| RECT r, dummy; |
| for (i = 0; list[i]; i++) |
| { |
| GetWindowRect( list[i], &r ); |
| MapWindowPoints( 0, hwnd, (POINT *)&r, 2 ); |
| if (!rect || IntersectRect(&dummy, &r, &rc)) |
| SetWindowPos( list[i], 0, r.left + dx, r.top + dy, 0, 0, |
| SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE | |
| SWP_NOREDRAW | SWP_DEFERERASE ); |
| } |
| HeapFree( GetProcessHeap(), 0, list ); |
| } |
| } |
| |
| if( flags & (SW_INVALIDATE | SW_ERASE) ) |
| RedrawWindow( hwnd, NULL, hrgnUpdate, RDW_INVALIDATE | RDW_ERASE | |
| ((flags & SW_ERASE) ? RDW_ERASENOW : 0) | |
| ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ) ); |
| |
| if( bCaret ) |
| { |
| SetCaretPos( caretrc.left + dx, caretrc.top + dy ); |
| ShowCaret(0); |
| } |
| |
| if( bOwnRgn && hrgnUpdate ) DeleteObject( hrgnUpdate ); |
| DeleteObject( hrgnClip ); |
| } |
| return retVal; |
| } |
