Sweden-Number/dlls/x11drv/scroll.c

236 lines
7.2 KiB
C

/*
* 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;
}