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Sweden-Number/windows/scroll.c

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/*
* Scroll windows and DCs
*
* Copyright David W. Metcalfe, 1993
* Alex Korobka 1995,1996
*
*
*/
#include <stdlib.h>
#include "windows.h"
#include "class.h"
#include "dc.h"
#include "win.h"
#include "gdi.h"
#include "dce.h"
#include "region.h"
#include "graphics.h"
#include "sysmetrics.h"
#include "debug.h"
/*************************************************************************
* ScrollWindow16 (USER.61)
*/
void WINAPI ScrollWindow16(HWND16 hwnd, INT16 dx, INT16 dy, const RECT16 *rect,
const RECT16 *clipRect )
{
RECT32 rect32, clipRect32;
if (rect) CONV_RECT16TO32( rect, &rect32 );
if (clipRect) CONV_RECT16TO32( clipRect, &clipRect32 );
ScrollWindow32( hwnd, dx, dy, rect ? &rect32 : NULL,
clipRect ? &clipRect32 : NULL );
}
/*************************************************************************
* ScrollWindow32 (USER32.450)
*
* FIXME: verify clipping region calculations
*/
BOOL32 WINAPI ScrollWindow32( HWND32 hwnd, INT32 dx, INT32 dy,
const RECT32 *rect, const RECT32 *clipRect )
{
HDC32 hdc;
HRGN32 hrgnUpdate,hrgnClip;
RECT32 rc, cliprc;
HWND32 hCaretWnd = CARET_GetHwnd();
WND* wndScroll = WIN_FindWndPtr( hwnd );
TRACE(scroll,"hwnd=%04x, dx=%d, dy=%d, lpRect =%p clipRect=%i,%i,%i,%i\n",
hwnd, dx, dy, rect,
clipRect ? clipRect->left : 0,
clipRect ? clipRect->top : 0,
clipRect ? clipRect->right : 0,
clipRect ? clipRect->bottom : 0 );
if ( !wndScroll || !WIN_IsWindowDrawable( wndScroll, TRUE ) ) return TRUE;
if ( !rect ) /* do not clip children */
{
GetClientRect32(hwnd, &rc);
hrgnClip = CreateRectRgnIndirect32( &rc );
if ((hCaretWnd == hwnd) || IsChild32(hwnd,hCaretWnd))
HideCaret32(hCaretWnd);
else hCaretWnd = 0;
hdc = GetDCEx32(hwnd, hrgnClip, DCX_CACHE | DCX_CLIPSIBLINGS);
DeleteObject32( hrgnClip );
}
else /* clip children */
{
CopyRect32(&rc, rect);
if (hCaretWnd == hwnd) HideCaret32(hCaretWnd);
else hCaretWnd = 0;
hdc = GetDCEx32( hwnd, 0, DCX_CACHE | DCX_USESTYLE );
}
if (clipRect == NULL)
GetClientRect32(hwnd, &cliprc);
else
CopyRect32(&cliprc, clipRect);
hrgnUpdate = CreateRectRgn32( 0, 0, 0, 0 );
ScrollDC32( hdc, dx, dy, &rc, &cliprc, hrgnUpdate, NULL );
ReleaseDC32(hwnd, hdc);
if( !rect ) /* move child windows and update region */
{
WND* wndPtr;
if( wndScroll->hrgnUpdate > 1 )
OffsetRgn32( wndScroll->hrgnUpdate, dx, dy );
for (wndPtr = wndScroll->child; wndPtr; wndPtr = wndPtr->next)
SetWindowPos32(wndPtr->hwndSelf, 0, wndPtr->rectWindow.left + dx,
wndPtr->rectWindow.top + dy, 0,0, SWP_NOZORDER |
SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOREDRAW |
SWP_DEFERERASE );
}
PAINT_RedrawWindow( hwnd, NULL, hrgnUpdate, RDW_ALLCHILDREN |
RDW_INVALIDATE | RDW_ERASE | RDW_ERASENOW, RDW_C_USEHRGN );
DeleteObject32( hrgnUpdate );
if( hCaretWnd )
{
POINT32 pt;
GetCaretPos32(&pt);
pt.x += dx; pt.y += dy;
SetCaretPos32(pt.x, pt.y);
ShowCaret32(hCaretWnd);
}
return TRUE;
}
/*************************************************************************
* ScrollDC16 (USER.221)
*/
BOOL16 WINAPI ScrollDC16( HDC16 hdc, INT16 dx, INT16 dy, const RECT16 *rect,
const RECT16 *cliprc, HRGN16 hrgnUpdate,
LPRECT16 rcUpdate )
{
RECT32 rect32, clipRect32, rcUpdate32;
BOOL16 ret;
if (rect) CONV_RECT16TO32( rect, &rect32 );
if (cliprc) CONV_RECT16TO32( cliprc, &clipRect32 );
ret = ScrollDC32( hdc, dx, dy, rect ? &rect32 : NULL,
cliprc ? &clipRect32 : NULL, hrgnUpdate, &rcUpdate32 );
if (rcUpdate) CONV_RECT32TO16( &rcUpdate32, rcUpdate );
return ret;
}
/*************************************************************************
* ScrollDC32 (USER32.449)
*
* Both 'rc' and 'prLClip' are in logical units but update info is
* returned in device coordinates.
*/
BOOL32 WINAPI ScrollDC32( HDC32 hdc, INT32 dx, INT32 dy, const RECT32 *rc,
const RECT32 *prLClip, HRGN32 hrgnUpdate,
LPRECT32 rcUpdate )
{
RECT32 rDClip, rLClip;
HRGN32 hrgnClip = 0;
HRGN32 hrgnScrollClip = 0;
POINT32 src, dest;
INT32 ldx, ldy;
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 )
{
rLClip = *rc;
rDClip.left = XLPTODP(dc, rc->left); rDClip.right = XLPTODP(dc, rc->right);
rDClip.top = YLPTODP(dc, rc->top); rDClip.bottom = YLPTODP(dc, rc->bottom);
}
else /* maybe we should just return FALSE? */
{
GetClipBox32( hdc, &rDClip );
rLClip.left = XDPTOLP(dc, rDClip.left); rLClip.right = XDPTOLP(dc, rDClip.right);
rLClip.top = YDPTOLP(dc, rDClip.top); rLClip.bottom = YDPTOLP(dc, rDClip.bottom);
}
if (prLClip)
{
RECT32 r;
r.left = XLPTODP(dc, prLClip->left); r.right = XLPTODP(dc, prLClip->right);
r.top = YLPTODP(dc, prLClip->top); r.bottom = YLPTODP(dc, prLClip->bottom);
IntersectRect32(&rLClip,&rLClip,prLClip);
IntersectRect32(&rDClip,&rDClip,&r);
}
if( rDClip.left >= rDClip.right || rDClip.top >= rDClip.bottom )
{
GDI_HEAP_UNLOCK( hdc );
return FALSE;
}
hrgnClip = GetClipRgn16(hdc);
hrgnScrollClip = CreateRectRgnIndirect32(&rDClip);
if( hrgnClip )
{
/* change device clipping region directly */
CombineRgn32( hrgnScrollClip, hrgnClip, 0, RGN_COPY );
SetRectRgn32( hrgnClip, rDClip.left, rDClip.top,
rDClip.right, rDClip.bottom );
CLIPPING_UpdateGCRegion( dc );
}
else
SelectClipRgn32( hdc, hrgnScrollClip );
/* translate coordinates */
ldx = dx * dc->wndExtX / dc->vportExtX;
ldy = dy * dc->wndExtY / dc->vportExtY;
if (dx > 0)
dest.x = (src.x = rLClip.left) + ldx;
else
src.x = (dest.x = rLClip.left) - ldx;
if (dy > 0)
dest.y = (src.y = rLClip.top) + ldy;
else
src.y = (dest.y = rLClip.top) - ldy;
/* copy bits */
if( rDClip.right - rDClip.left > dx &&
rDClip.bottom - rDClip.top > dy )
{
ldx = rLClip.right - rLClip.left - ldx;
ldy = rLClip.bottom - rLClip.top - ldy;
if (!BitBlt32( hdc, dest.x, dest.y, ldx, ldy,
hdc, src.x, src.y, SRCCOPY))
{
GDI_HEAP_UNLOCK( hdc );
return FALSE;
}
}
/* restore clipping region */
if( hrgnClip )
{
CombineRgn32( hrgnClip, hrgnScrollClip, 0, RGN_COPY );
CLIPPING_UpdateGCRegion( dc );
SetRectRgn32( hrgnScrollClip, rDClip.left, rDClip.top,
rDClip.right, rDClip.bottom );
}
else
SelectClipRgn32( hdc, 0 );
/* compute update areas */
if (hrgnUpdate || rcUpdate)
{
HRGN32 hrgn = (hrgnUpdate) ? hrgnUpdate : CreateRectRgn32( 0,0,0,0 );
if( dc->w.hVisRgn )
{
CombineRgn32( hrgn, dc->w.hVisRgn, hrgnScrollClip, RGN_AND );
OffsetRgn32( hrgn, dx, dy );
CombineRgn32( hrgn, dc->w.hVisRgn, hrgn, RGN_DIFF );
CombineRgn32( hrgn, hrgn, hrgnScrollClip, RGN_AND );
}
else
{
RECT32 rect;
rect = rDClip; /* vertical band */
if (dx > 0) rect.right = rect.left + dx;
else if (dx < 0) rect.left = rect.right + dx;
else SetRectEmpty32( &rect );
SetRectRgn32( hrgn, rect.left, rect.top, rect.right, rect.bottom );
rect = rDClip; /* horizontal band */
if (dy > 0) rect.bottom = rect.top + dy;
else if (dy < 0) rect.top = rect.bottom + dy;
else SetRectEmpty32( &rect );
REGION_UnionRectWithRgn( hrgn, &rect );
}
if (rcUpdate) GetRgnBox32( hrgn, rcUpdate );
if (!hrgnUpdate) DeleteObject32( hrgn );
}
DeleteObject32( hrgnScrollClip );
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 )
{
RECT32 rect32, clipRect32, rcUpdate32;
BOOL16 ret;
if (rect) CONV_RECT16TO32( rect, &rect32 );
if (clipRect) CONV_RECT16TO32( clipRect, &clipRect32 );
ret = ScrollWindowEx32( 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 BOOL32 SCROLL_FixCaret(HWND32 hWnd, LPRECT32 lprc, UINT32 flags)
{
HWND32 hCaret = CARET_GetHwnd();
if( hCaret )
{
RECT32 rc;
CARET_GetRect( &rc );
if( hCaret == hWnd ||
(flags & SW_SCROLLCHILDREN && IsChild32(hWnd, hCaret)) )
{
POINT32 pt;
pt.x = rc.left; pt.y = rc.top;
MapWindowPoints32( hCaret, hWnd, (LPPOINT32)&rc, 2 );
if( IntersectRect32(lprc, lprc, &rc) )
{
HideCaret32(0);
lprc->left = pt.x; lprc->top = pt.y;
return TRUE;
}
}
}
return FALSE;
}
/*************************************************************************
* ScrollWindowEx32 (USER32.451)
*
* NOTE: Use this function instead of ScrollWindow32
*/
INT32 WINAPI ScrollWindowEx32( HWND32 hwnd, INT32 dx, INT32 dy,
const RECT32 *rect, const RECT32 *clipRect,
HRGN32 hrgnUpdate, LPRECT32 rcUpdate,
UINT32 flags )
{
INT32 retVal = NULLREGION;
BOOL32 bCaret = FALSE, bOwnRgn = TRUE;
RECT32 rc, cliprc;
WND* wnd = WIN_FindWndPtr( hwnd );
if( !wnd || !WIN_IsWindowDrawable( wnd, TRUE )) return ERROR;
if (rect == NULL) GetClientRect32(hwnd, &rc);
else rc = *rect;
if (clipRect) IntersectRect32(&cliprc,&rc,clipRect);
else cliprc = rc;
if (!IsRectEmpty32(&cliprc) && (dx || dy))
{
DC* dc;
HDC32 hDC;
BOOL32 bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE));
HRGN32 hrgnClip = CreateRectRgnIndirect32(&cliprc);
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,
rect?rect->left:0, rect?rect->top:0, rect ?rect->right:0, rect ?rect->bottom:0, (UINT16)flags );
rc = cliprc;
bCaret = SCROLL_FixCaret(hwnd, &rc, flags);
if( hrgnUpdate ) bOwnRgn = FALSE;
else if( bUpdate ) hrgnUpdate = CreateRectRgn32( 0, 0, 0, 0 );
hDC = GetDCEx32( hwnd, hrgnClip, DCX_CACHE | DCX_USESTYLE |
((flags & SW_SCROLLCHILDREN) ? DCX_NOCLIPCHILDREN : 0) );
if( (dc = (DC *)GDI_GetObjPtr(hDC, DC_MAGIC)) )
{
POINT32 dst, src;
if( dx > 0 ) dst.x = (src.x = dc->w.DCOrgX + cliprc.left) + dx;
else src.x = (dst.x = dc->w.DCOrgX + cliprc.left) - dx;
if( dy > 0 ) dst.y = (src.y = dc->w.DCOrgY + cliprc.top) + dy;
else src.y = (dst.y = dc->w.DCOrgY + cliprc.top) - dy;
if( bUpdate ) /* handles non-Wine windows hanging over the scrolled area */
TSXSetGraphicsExposures( display, dc->u.x.gc, True );
TSXSetFunction( display, dc->u.x.gc, GXcopy );
TSXCopyArea( display, dc->u.x.drawable, dc->u.x.drawable, dc->u.x.gc,
src.x, src.y, cliprc.right - cliprc.left - abs(dx),
cliprc.bottom - cliprc.top - abs(dy), dst.x, dst.y );
if( bUpdate )
TSXSetGraphicsExposures( display, dc->u.x.gc, False );
if( dc->w.hVisRgn && bUpdate )
{
CombineRgn32( hrgnUpdate, dc->w.hVisRgn, hrgnClip, RGN_AND );
OffsetRgn32( hrgnUpdate, dx, dy );
CombineRgn32( hrgnUpdate, dc->w.hVisRgn, hrgnUpdate, RGN_DIFF );
CombineRgn32( hrgnUpdate, hrgnUpdate, hrgnClip, RGN_AND );
if( rcUpdate ) GetRgnBox32( hrgnUpdate, rcUpdate );
}
ReleaseDC32(hwnd, hDC);
GDI_HEAP_UNLOCK( hDC );
}
if( wnd->hrgnUpdate > 1 )
{
if( rect || clipRect )
{
if( (CombineRgn32( hrgnClip, hrgnClip,
wnd->hrgnUpdate, RGN_AND ) != NULLREGION) )
{
CombineRgn32( wnd->hrgnUpdate, wnd->hrgnUpdate, hrgnClip, RGN_DIFF );
OffsetRgn32( hrgnClip, dx, dy );
CombineRgn32( wnd->hrgnUpdate, wnd->hrgnUpdate, hrgnClip, RGN_OR );
}
}
else
OffsetRgn32( wnd->hrgnUpdate, dx, dy );
}
if( flags & SW_SCROLLCHILDREN )
{
RECT32 r;
WND* w;
for( w = wnd->child; w; w = w->next )
{
CONV_RECT16TO32( &w->rectWindow, &r );
if( !clipRect || IntersectRect32(&r, &r, &cliprc) )
SetWindowPos32(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 )
{
SetCaretPos32( rc.left + dx, rc.top + dy );
ShowCaret32(0);
}
if( bOwnRgn && hrgnUpdate ) DeleteObject32( hrgnUpdate );
DeleteObject32( hrgnClip );
}
return retVal;
}
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