| /* |
| * Scroll windows and DCs |
| * |
| * Copyright David W. Metcalfe, 1993 |
| * Alex Korobka 1995,1996 |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <stdarg.h> |
| #include <stdlib.h> |
| |
| #include "windef.h" |
| #include "winbase.h" |
| #include "wingdi.h" |
| #include "wine/winuser16.h" |
| #include "winuser.h" |
| #include "user_private.h" |
| #include "win.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(scroll); |
| |
| /************************************************************************* |
| * fix_caret |
| */ |
| static HWND fix_caret(HWND hWnd, LPRECT lprc, UINT flags) |
| { |
| GUITHREADINFO info; |
| |
| if (!GetGUIThreadInfo( GetCurrentThreadId(), &info )) return 0; |
| if (!info.hwndCaret) return 0; |
| if (info.hwndCaret == hWnd || |
| ((flags & SW_SCROLLCHILDREN) && IsChild(hWnd, info.hwndCaret))) |
| { |
| POINT pt; |
| pt.x = info.rcCaret.left; |
| pt.y = info.rcCaret.top; |
| MapWindowPoints( info.hwndCaret, hWnd, (LPPOINT)&info.rcCaret, 2 ); |
| if( IntersectRect(lprc, lprc, &info.rcCaret) ) |
| { |
| HideCaret(0); |
| lprc->left = pt.x; |
| lprc->top = pt.y; |
| return info.hwndCaret; |
| } |
| } |
| return 0; |
| } |
| |
| /************************************************************************* |
| * ScrollWindowEx (USER32.@) |
| * |
| * Note: contrary to what the doc says, pixels that are scrolled from the |
| * outside of clipRect to the inside are NOT painted. |
| * |
| */ |
| 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 bOwnRgn = TRUE; |
| BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE)); |
| int rdw_flags; |
| HRGN hrgnTemp; |
| HDC hDC; |
| RECT rc, cliprc; |
| RECT caretrc; |
| HWND hwndCaret = NULL; |
| |
| TRACE( "%p, %d,%d hrgnUpdate=%p rcUpdate = %p %s %04x\n", |
| hwnd, dx, dy, hrgnUpdate, rcUpdate, wine_dbgstr_rect(rect), flags ); |
| TRACE( "clipRect = %s\n", wine_dbgstr_rect(clipRect)); |
| if( flags & ~( SW_SCROLLCHILDREN | SW_INVALIDATE | SW_ERASE)) |
| FIXME("some flags (%04x) are unhandled\n", flags); |
| |
| rdw_flags = (flags & SW_ERASE) && (flags & SW_INVALIDATE) ? |
| RDW_INVALIDATE | RDW_ERASE : RDW_INVALIDATE ; |
| |
| 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( hrgnUpdate ) bOwnRgn = FALSE; |
| else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 ); |
| |
| if( !IsRectEmpty(&cliprc) && (dx || dy)) { |
| caretrc = rc; |
| hwndCaret = fix_caret(hwnd, &caretrc, flags); |
| |
| hDC = GetDCEx( hwnd, 0, DCX_CACHE | DCX_USESTYLE ); |
| if (hDC) |
| { |
| ScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate ); |
| |
| ReleaseDC( hwnd, hDC ); |
| |
| if (!bUpdate) |
| RedrawWindow( hwnd, NULL, hrgnUpdate, rdw_flags); |
| } |
| |
| /* Take into account the fact that some damage may have occurred during |
| * the scroll */ |
| hrgnTemp = CreateRectRgn( 0, 0, 0, 0 ); |
| retVal = GetUpdateRgn( hwnd, hrgnTemp, FALSE ); |
| if (retVal != NULLREGION) |
| { |
| HRGN hrgnClip = CreateRectRgnIndirect(&cliprc); |
| OffsetRgn( hrgnTemp, dx, dy ); |
| CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND ); |
| RedrawWindow( hwnd, NULL, hrgnTemp, rdw_flags); |
| DeleteObject( hrgnClip ); |
| } |
| DeleteObject( hrgnTemp ); |
| } else { |
| /* nothing was scrolled */ |
| if( !bOwnRgn) |
| SetRectRgn( hrgnUpdate, 0, 0, 0, 0 ); |
| SetRectEmpty( rcUpdate); |
| } |
| |
| 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, rect)) |
| 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_flags | |
| ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ) ); |
| |
| if( hwndCaret ) { |
| SetCaretPos( caretrc.left + dx, caretrc.top + dy ); |
| ShowCaret(hwndCaret); |
| } |
| |
| if( bOwnRgn && hrgnUpdate ) DeleteObject( hrgnUpdate ); |
| |
| return retVal; |
| } |
| |
| /************************************************************************* |
| * 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 (USER32.@) |
| * |
| * dx, dy, lprcScroll and lprcClip are all in logical coordinates (msdn is wrong) |
| * hrgnUpdate is returned in device coordinates with rcUpdate in logical coordinates. |
| */ |
| BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *lprcScroll, |
| const RECT *lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate ) |
| |
| { |
| RECT rSrc, rClipped_src, rClip, rDst, offset; |
| |
| TRACE( "%p %d,%d hrgnUpdate=%p lprcUpdate = %p\n", hdc, dx, dy, hrgnUpdate, lprcUpdate ); |
| if (lprcClip) TRACE( "lprcClip = %s\n", wine_dbgstr_rect(lprcClip)); |
| if (lprcScroll) TRACE( "lprcScroll = %s\n", wine_dbgstr_rect(lprcScroll)); |
| |
| if (USER_Driver.pScrollDC) |
| return USER_Driver.pScrollDC( hdc, dx, dy, lprcScroll, lprcClip, hrgnUpdate, lprcUpdate ); |
| |
| /* compute device clipping region (in device coordinates) */ |
| if (lprcScroll) rSrc = *lprcScroll; |
| else GetClipBox( hdc, &rSrc ); |
| LPtoDP(hdc, (LPPOINT)&rSrc, 2); |
| |
| if (lprcClip) rClip = *lprcClip; |
| else GetClipBox( hdc, &rClip ); |
| LPtoDP(hdc, (LPPOINT)&rClip, 2); |
| |
| IntersectRect( &rClipped_src, &rSrc, &rClip ); |
| TRACE("rSrc %s rClip %s clipped rSrc %s\n", wine_dbgstr_rect(&rSrc), |
| wine_dbgstr_rect(&rClip), wine_dbgstr_rect(&rClipped_src)); |
| |
| rDst = rClipped_src; |
| SetRect(&offset, 0, 0, dx, dy); |
| LPtoDP(hdc, (LPPOINT)&offset, 2); |
| OffsetRect( &rDst, offset.right - offset.left, offset.bottom - offset.top ); |
| TRACE("rDst before clipping %s\n", wine_dbgstr_rect(&rDst)); |
| IntersectRect( &rDst, &rDst, &rClip ); |
| TRACE("rDst after clipping %s\n", wine_dbgstr_rect(&rDst)); |
| |
| if (!IsRectEmpty(&rDst)) |
| { |
| /* copy bits */ |
| RECT rDst_lp = rDst, rSrc_lp = rDst; |
| |
| OffsetRect( &rSrc_lp, offset.left - offset.right, offset.top - offset.bottom ); |
| DPtoLP(hdc, (LPPOINT)&rDst_lp, 2); |
| DPtoLP(hdc, (LPPOINT)&rSrc_lp, 2); |
| |
| if (!BitBlt( hdc, rDst_lp.left, rDst_lp.top, |
| rDst_lp.right - rDst_lp.left, rDst_lp.bottom - rDst_lp.top, |
| hdc, rSrc_lp.left, rSrc_lp.top, SRCCOPY)) |
| return FALSE; |
| } |
| |
| /* compute update areas. This is the clipped source or'ed with the unclipped source translated minus the |
| clipped src translated (rDst) all clipped to rClip */ |
| |
| if (hrgnUpdate || lprcUpdate) |
| { |
| HRGN hrgn = hrgnUpdate, hrgn2; |
| |
| if (hrgn) SetRectRgn( hrgn, rClipped_src.left, rClipped_src.top, rClipped_src.right, rClipped_src.bottom ); |
| else hrgn = CreateRectRgn( rClipped_src.left, rClipped_src.top, rClipped_src.right, rClipped_src.bottom ); |
| |
| hrgn2 = CreateRectRgnIndirect( &rSrc ); |
| OffsetRgn(hrgn2, offset.right - offset.left, offset.bottom - offset.top ); |
| CombineRgn(hrgn, hrgn, hrgn2, RGN_OR); |
| |
| SetRectRgn( hrgn2, rDst.left, rDst.top, rDst.right, rDst.bottom ); |
| CombineRgn( hrgn, hrgn, hrgn2, RGN_DIFF ); |
| |
| SetRectRgn( hrgn2, rClip.left, rClip.top, rClip.right, rClip.bottom ); |
| CombineRgn( hrgn, hrgn, hrgn2, RGN_AND ); |
| |
| if( lprcUpdate ) |
| { |
| GetRgnBox( hrgn, lprcUpdate ); |
| |
| /* Put the lprcUpdate in logical coordinate */ |
| DPtoLP( hdc, (LPPOINT)lprcUpdate, 2 ); |
| TRACE("returning lprcUpdate %s\n", wine_dbgstr_rect(lprcUpdate)); |
| } |
| if (!hrgnUpdate) DeleteObject( hrgn ); |
| DeleteObject( hrgn2 ); |
| } |
| return TRUE; |
| } |
