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