Sweden-Number/windows/scroll.c

344 lines
11 KiB
C

/*
* Scroll windows and DCs
*
* Copyright David W. Metcalfe, 1993
* Alex Korobka 1995,1996
*
*
*/
#include <stdlib.h>
#include "winuser.h"
#include "dc.h"
#include "win.h"
#include "gdi.h"
#include "dce.h"
#include "region.h"
#include "debug.h"
DEFAULT_DEBUG_CHANNEL(scroll)
/*************************************************************************
* ScrollWindow16 (USER.61)
*/
void WINAPI ScrollWindow16(HWND16 hwnd, INT16 dx, INT16 dy, const RECT16 *rect,
const RECT16 *clipRect )
{
RECT rect32, clipRect32;
if (rect) CONV_RECT16TO32( rect, &rect32 );
if (clipRect) CONV_RECT16TO32( clipRect, &clipRect32 );
ScrollWindow( hwnd, dx, dy, rect ? &rect32 : NULL,
clipRect ? &clipRect32 : NULL );
}
/*************************************************************************
* ScrollWindow32 (USER32.450)
*
*/
BOOL WINAPI ScrollWindow( HWND hwnd, INT dx, INT dy,
const RECT *rect, const RECT *clipRect )
{
return
(ERROR != ScrollWindowEx( hwnd, dx, dy, rect, clipRect, 0, NULL,
(rect ? 0 : SW_SCROLLCHILDREN) |
SW_INVALIDATE ));
}
/*************************************************************************
* ScrollDC16 (USER.221)
*/
BOOL16 WINAPI ScrollDC16( HDC16 hdc, INT16 dx, INT16 dy, const RECT16 *rect,
const RECT16 *cliprc, HRGN16 hrgnUpdate,
LPRECT16 rcUpdate )
{
RECT rect32, clipRect32, rcUpdate32;
BOOL16 ret;
if (rect) CONV_RECT16TO32( rect, &rect32 );
if (cliprc) CONV_RECT16TO32( cliprc, &clipRect32 );
ret = ScrollDC( hdc, dx, dy, rect ? &rect32 : NULL,
cliprc ? &clipRect32 : NULL, hrgnUpdate, &rcUpdate32 );
if (rcUpdate) CONV_RECT32TO16( &rcUpdate32, rcUpdate );
return ret;
}
/*************************************************************************
* ScrollDC32 (USER32.449)
*
* Only the hrgnUpdate is return in device coordinate.
* rcUpdate must be returned in logical coordinate to comply with win API.
*
*/
BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc,
const RECT *prLClip, HRGN hrgnUpdate,
LPRECT rcUpdate )
{
RECT rect, rClip, rSrc;
POINT src, dest;
DC *dc = (DC *)GDI_GetObjPtr(hdc, DC_MAGIC);
TRACE(scroll,"%04x %d,%d hrgnUpdate=%04x rcUpdate = %p cliprc = (%d,%d-%d,%d), rc=(%d,%d-%d,%d)\n",
(HDC16)hdc, dx, dy, hrgnUpdate, rcUpdate,
prLClip ? prLClip->left : 0, prLClip ? prLClip->top : 0, prLClip ? prLClip->right : 0, prLClip ? prLClip->bottom : 0,
rc ? rc->left : 0, rc ? rc->top : 0, rc ? rc->right : 0, rc ? rc->bottom : 0 );
if ( !dc || !hdc ) return FALSE;
/*
TRACE(scroll,"\t[wndOrgX=%i, wndExtX=%i, vportOrgX=%i, vportExtX=%i]\n",
dc->wndOrgX, dc->wndExtX, dc->vportOrgX, dc->vportExtX );
TRACE(scroll,"\t[wndOrgY=%i, wndExtY=%i, vportOrgY=%i, vportExtY=%i]\n",
dc->wndOrgY, dc->wndExtY, dc->vportOrgY, dc->vportExtY );
*/
/* compute device clipping region */
if ( rc )
rect = *rc;
else /* maybe we should just return FALSE? */
GetClipBox( hdc, &rect );
if (prLClip)
IntersectRect( &rClip,&rect,prLClip );
else
rClip = rect;
rSrc = rClip;
OffsetRect( &rSrc, -dx, -dy );
IntersectRect( &rSrc, &rSrc, &rect );
if(dc->w.hVisRgn)
{
if (!IsRectEmpty(&rSrc))
{
dest.x = (src.x = rSrc.left) + dx;
dest.y = (src.y = rSrc.top) + dy;
/* copy bits */
if (!BitBlt( hdc, dest.x, dest.y,
rSrc.right - rSrc.left, rSrc.bottom - rSrc.top,
hdc, src.x, src.y, SRCCOPY))
{
GDI_HEAP_UNLOCK( hdc );
return FALSE;
}
}
/* compute update areas */
if (hrgnUpdate || rcUpdate)
{
HRGN hrgn =
(hrgnUpdate) ? hrgnUpdate : CreateRectRgn( 0,0,0,0 );
HRGN hrgn2;
dx = XLPTODP ( dc, rect.left + dx) - XLPTODP ( dc, rect.left);
dy = YLPTODP ( dc, rect.top + dy) - YLPTODP ( dc, rect.top);
LPtoDP( hdc, (LPPOINT)&rect, 2 );
LPtoDP( hdc, (LPPOINT)&rClip, 2 );
hrgn2 = CreateRectRgnIndirect( &rect );
OffsetRgn( hrgn2, dc->w.DCOrgX, dc->w.DCOrgY );
CombineRgn( hrgn2, hrgn2, dc->w.hVisRgn, RGN_AND );
OffsetRgn( hrgn2, -dc->w.DCOrgX, -dc->w.DCOrgY );
SetRectRgn( hrgn, 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 );
}
}
else
{
if (hrgnUpdate) SetRectRgn(hrgnUpdate, 0, 0, 0, 0);
if (rcUpdate) SetRectEmpty(rcUpdate);
}
GDI_HEAP_UNLOCK( hdc );
return TRUE;
}
/*************************************************************************
* ScrollWindowEx16 (USER.319)
*/
INT16 WINAPI ScrollWindowEx16( HWND16 hwnd, INT16 dx, INT16 dy,
const RECT16 *rect, const RECT16 *clipRect,
HRGN16 hrgnUpdate, LPRECT16 rcUpdate,
UINT16 flags )
{
RECT rect32, clipRect32, rcUpdate32;
BOOL16 ret;
if (rect) CONV_RECT16TO32( rect, &rect32 );
if (clipRect) CONV_RECT16TO32( clipRect, &clipRect32 );
ret = ScrollWindowEx( hwnd, dx, dy, rect ? &rect32 : NULL,
clipRect ? &clipRect32 : NULL, hrgnUpdate,
(rcUpdate) ? &rcUpdate32 : NULL, flags );
if (rcUpdate) CONV_RECT32TO16( &rcUpdate32, rcUpdate );
return ret;
}
/*************************************************************************
* SCROLL_FixCaret
*/
static BOOL SCROLL_FixCaret(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;
}
/*************************************************************************
* ScrollWindowEx32 (USER32.451)
*
* NOTE: Use this function instead of ScrollWindow32
*/
INT WINAPI 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;
WND* wnd = WIN_FindWndPtr( hwnd );
if( !wnd || !WIN_IsWindowDrawable( wnd, TRUE ))
{
retVal = ERROR;
goto END;
}
GetClientRect(hwnd, &rc);
if (rect) IntersectRect(&rc, &rc, rect);
if (clipRect) IntersectRect(&cliprc,&rc,clipRect);
else cliprc = rc;
if (!IsRectEmpty(&cliprc) && (dx || dy))
{
DC* dc;
HDC hDC;
BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE));
HRGN hrgnClip = CreateRectRgnIndirect(&cliprc);
HRGN hrgnTemp = CreateRectRgnIndirect(&rc);
RECT caretrc;
TRACE(scroll,"%04x, %d,%d hrgnUpdate=%04x rcUpdate = %p \
cliprc = (%d,%d-%d,%d), rc=(%d,%d-%d,%d) %04x\n",
(HWND16)hwnd, dx, dy, hrgnUpdate, rcUpdate,
clipRect?clipRect->left:0, clipRect?clipRect->top:0, clipRect?clipRect->right:0, clipRect?clipRect->bottom:0,
rc.left, rc.top, rc.right, rc.bottom, (UINT16)flags );
caretrc = rc;
bCaret = SCROLL_FixCaret(hwnd, &caretrc, flags);
if( hrgnUpdate ) bOwnRgn = FALSE;
else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
hDC = GetDCEx( hwnd, hrgnClip, DCX_CACHE | DCX_USESTYLE |
DCX_KEEPCLIPRGN | DCX_INTERSECTRGN |
((flags & SW_SCROLLCHILDREN) ? DCX_NOCLIPCHILDREN : 0) );
if( (dc = (DC *)GDI_GetObjPtr(hDC, DC_MAGIC)) )
{
if (dc->w.hVisRgn) {
wnd->pDriver->pSurfaceCopy(wnd,dc,dx,dy,&rc,bUpdate);
if( bUpdate )
{
OffsetRgn( hrgnTemp, dc->w.DCOrgX, dc->w.DCOrgY );
CombineRgn( hrgnTemp, hrgnTemp, dc->w.hVisRgn,
RGN_AND );
OffsetRgn( hrgnTemp, -dc->w.DCOrgX, -dc->w.DCOrgY );
CombineRgn( hrgnUpdate, hrgnTemp, hrgnClip,
RGN_AND );
OffsetRgn( hrgnTemp, dx, dy );
retVal =
CombineRgn( hrgnUpdate, hrgnUpdate, hrgnTemp,
RGN_DIFF );
if( rcUpdate ) GetRgnBox( hrgnUpdate, rcUpdate );
}
}
ReleaseDC(hwnd, hDC);
GDI_HEAP_UNLOCK( hDC );
}
if( wnd->hrgnUpdate > 1 )
{
/* Takes into account the fact that some damages may have
occured during the scroll. */
CombineRgn( hrgnTemp, wnd->hrgnUpdate, 0, RGN_COPY );
OffsetRgn( hrgnTemp, dx, dy );
CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND );
CombineRgn( wnd->hrgnUpdate, wnd->hrgnUpdate, hrgnTemp, RGN_OR );
}
if( flags & SW_SCROLLCHILDREN )
{
RECT r;
WND* w;
for( w =WIN_LockWndPtr(wnd->child); w; WIN_UpdateWndPtr(&w, w->next))
{
CONV_RECT16TO32( &w->rectWindow, &r );
if( IntersectRect(&r, &r, &rc) )
SetWindowPos(w->hwndSelf, 0, w->rectWindow.left + dx,
w->rectWindow.top + dy, 0,0, SWP_NOZORDER |
SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOREDRAW |
SWP_DEFERERASE );
}
}
if( flags & (SW_INVALIDATE | SW_ERASE) )
PAINT_RedrawWindow( hwnd, NULL, hrgnUpdate, RDW_INVALIDATE | RDW_ERASE |
((flags & SW_ERASE) ? RDW_ERASENOW : 0) | ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ), 0 );
if( bCaret )
{
SetCaretPos( caretrc.left + dx, caretrc.top + dy );
ShowCaret(0);
}
if( bOwnRgn && hrgnUpdate ) DeleteObject( hrgnUpdate );
DeleteObject( hrgnClip );
DeleteObject( hrgnTemp );
}
END:
WIN_ReleaseWndPtr(wnd);
return retVal;
}