| /* |
| * Scroll windows and DCs |
| * |
| * Copyright David W. Metcalfe, 1993 |
| * Alex Korobka 1995,1996 |
| * |
| * |
| */ |
| |
| #include <stdlib.h> |
| |
| #include "windef.h" |
| #include "wingdi.h" |
| #include "wine/winuser16.h" |
| #include "winuser.h" |
| #include "win.h" |
| #include "gdi.h" |
| #include "dce.h" |
| #include "region.h" |
| #include "debugtools.h" |
| |
| DEFAULT_DEBUG_CHANNEL(scroll); |
| |
| /************************************************************************* |
| * ScrollWindow (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 ); |
| } |
| |
| /************************************************************************* |
| * ScrollWindow (USER32.@) |
| * |
| */ |
| 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 )); |
| } |
| |
| /************************************************************************* |
| * ScrollDC (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; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollDC (USER32.@) |
| * |
| * 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_GetDCUpdate( hdc ); |
| |
| TRACE("%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 (in device coordinates) */ |
| |
| if ( rc ) |
| rect = *rc; |
| else /* maybe we should just return FALSE? */ |
| GetClipBox( hdc, &rect ); |
| |
| LPtoDP( hdc, (LPPOINT)&rect, 2 ); |
| |
| if (prLClip) |
| { |
| rClip = *prLClip; |
| LPtoDP( hdc, (LPPOINT)&rClip, 2 ); |
| IntersectRect( &rClip, &rect, &rClip ); |
| } |
| else |
| rClip = rect; |
| |
| dx = XLPTODP ( dc, rect.left + dx ) - XLPTODP ( dc, rect.left ); |
| dy = YLPTODP ( dc, rect.top + dy ) - YLPTODP ( dc, rect.top ); |
| |
| rSrc = rClip; |
| OffsetRect( &rSrc, -dx, -dy ); |
| IntersectRect( &rSrc, &rSrc, &rect ); |
| |
| if(dc->hVisRgn) |
| { |
| if (!IsRectEmpty(&rSrc)) |
| { |
| dest.x = (src.x = rSrc.left) + dx; |
| dest.y = (src.y = rSrc.top) + dy; |
| |
| /* copy bits */ |
| |
| DPtoLP( hdc, (LPPOINT)&rSrc, 2 ); |
| DPtoLP( hdc, &src, 1 ); |
| DPtoLP( hdc, &dest, 1 ); |
| |
| if (!BitBlt( hdc, dest.x, dest.y, |
| rSrc.right - rSrc.left, rSrc.bottom - rSrc.top, |
| hdc, src.x, src.y, SRCCOPY)) |
| { |
| GDI_ReleaseObj( hdc ); |
| return FALSE; |
| } |
| } |
| |
| /* compute update areas */ |
| |
| if (hrgnUpdate || rcUpdate) |
| { |
| HRGN hrgn = |
| (hrgnUpdate) ? hrgnUpdate : CreateRectRgn( 0,0,0,0 ); |
| HRGN hrgn2; |
| |
| hrgn2 = CreateRectRgnIndirect( &rect ); |
| OffsetRgn( hrgn2, dc->DCOrgX, dc->DCOrgY ); |
| CombineRgn( hrgn2, hrgn2, dc->hVisRgn, RGN_AND ); |
| OffsetRgn( hrgn2, -dc->DCOrgX, -dc->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_ReleaseObj( hdc ); |
| return TRUE; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollWindowEx (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; |
| } |
| |
| /************************************************************************* |
| * ScrollWindowEx (USER32.@) |
| * |
| * 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)) |
| { |
| HDC hDC; |
| BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE)); |
| HRGN hrgnClip = CreateRectRgnIndirect(&cliprc); |
| HRGN hrgnTemp = CreateRectRgnIndirect(&rc); |
| RECT caretrc; |
| |
| TRACE("%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 (hDC) |
| { |
| wnd->pDriver->pSurfaceCopy(wnd,hDC,dx,dy,&rc,bUpdate); |
| if( bUpdate ) |
| { |
| DC* dc; |
| |
| if( (dc = DC_GetDCPtr(hDC)) ) |
| { |
| OffsetRgn( hrgnTemp, dc->DCOrgX, dc->DCOrgY ); |
| CombineRgn( hrgnTemp, hrgnTemp, dc->hVisRgn, |
| RGN_AND ); |
| OffsetRgn( hrgnTemp, -dc->DCOrgX, -dc->DCOrgY ); |
| CombineRgn( hrgnUpdate, hrgnTemp, hrgnClip, |
| RGN_AND ); |
| OffsetRgn( hrgnTemp, dx, dy ); |
| retVal = |
| CombineRgn( hrgnUpdate, hrgnUpdate, hrgnTemp, |
| RGN_DIFF ); |
| |
| if( rcUpdate ) GetRgnBox( hrgnUpdate, rcUpdate ); |
| GDI_ReleaseObj( hDC ); |
| } |
| } |
| ReleaseDC(hwnd, 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)) |
| { |
| r = w->rectWindow; |
| if( !rect || 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) ) |
| 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 ); |
| DeleteObject( hrgnTemp ); |
| } |
| END: |
| WIN_ReleaseWndPtr(wnd); |
| return retVal; |
| } |
