mirror of
git://source.winehq.org/git/wine.git
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244 lines
7.8 KiB
C
244 lines
7.8 KiB
C
/*
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* Scroll windows and DCs
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*
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* Copyright 1993 David W. Metcalfe
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* Copyright 1995, 1996 Alex Korobka
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* Copyright 2001 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include "ts_xlib.h"
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#include "ts_xutil.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winuser.h"
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#include "x11drv.h"
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#include "win.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(scroll);
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/*************************************************************************
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* fix_caret
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*/
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static BOOL fix_caret(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;
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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;
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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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* ScrollDC (X11DRV.@)
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*
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* Only the hrgnUpdate is returned in device coordinates.
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* rcUpdate must be returned in logical coordinates to comply with win API.
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* FIXME: the doc explicitly states the opposite, to be checked
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*/
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BOOL X11DRV_ScrollDC( HDC hdc, INT dx, INT dy, const RECT *rc,
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const RECT *clipRect, HRGN hrgnUpdate, LPRECT rcUpdate )
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{
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RECT rect, rClip, rDst;
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TRACE( "%04x %d,%d hrgnUpdate=%04x rcUpdate = %p\n", hdc, dx, dy, hrgnUpdate, rcUpdate );
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if (clipRect) TRACE( "cliprc = (%d,%d,%d,%d)\n",
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clipRect->left, clipRect->top, clipRect->right, clipRect->bottom );
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if (rc) TRACE( "rc = (%d,%d,%d,%d)\n", rc->left, rc->top, rc->right, rc->bottom );
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/* compute device clipping region (in device coordinates) */
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if (rc) rect = *rc;
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else GetClipBox( hdc, &rect );
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if (clipRect)
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{
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rClip = *clipRect;
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IntersectRect( &rClip, &rect, &rClip );
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}
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else rClip = rect;
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rDst = rClip;
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OffsetRect( &rDst, dx, dy );
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IntersectRect( &rDst, &rDst, &rClip );
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if (!IsRectEmpty(&rDst))
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{
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/* copy bits */
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if (!BitBlt( hdc, rDst.left, rDst.top,
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rDst.right - rDst.left, rDst.bottom - rDst.top,
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hdc, rDst.left - dx, rDst.top - dy, SRCCOPY))
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return FALSE;
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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 = hrgnUpdate, hrgn2;
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/* map everything to device coordinates */
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LPtoDP( hdc, (LPPOINT)&rClip, 2 );
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LPtoDP( hdc, (LPPOINT)&rDst, 2 );
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hrgn2 = CreateRectRgnIndirect( &rDst );
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if (hrgn) SetRectRgn( hrgn, rClip.left, rClip.top, rClip.right, rClip.bottom );
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else hrgn = CreateRectRgn( rClip.left, rClip.top, rClip.right, rClip.bottom );
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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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return TRUE;
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}
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/*************************************************************************
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* ScrollWindowEx (X11DRV.@)
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*
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* Note: contrary to what the doc says, pixels that are scrolled from the
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* outside of clipRect to the inside are NOT painted.
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*/
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INT X11DRV_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, 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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if (!WIN_IsWindowDrawable( hwnd, TRUE )) return ERROR;
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hwnd = WIN_GetFullHandle( hwnd );
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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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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;
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RECT caretrc;
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TRACE( "%04x, %d,%d hrgnUpdate=%04x rcUpdate = %p rc=(%d,%d-%d,%d) %04x\n",
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hwnd, dx, dy, hrgnUpdate, rcUpdate,
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rc.left, rc.top, rc.right, rc.bottom, flags );
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if (clipRect) TRACE( "cliprc = (%d,%d,%d,%d)\n",
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clipRect->left, clipRect->top,
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clipRect->right, clipRect->bottom );
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caretrc = rc;
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bCaret = fix_caret(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, 0, DCX_CACHE | DCX_USESTYLE );
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if (hDC)
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{
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HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
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X11DRV_StartGraphicsExposures( hDC );
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X11DRV_ScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate );
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X11DRV_EndGraphicsExposures( hDC, hrgn );
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ReleaseDC( hwnd, hDC );
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if (bUpdate) CombineRgn( hrgnUpdate, hrgnUpdate, hrgn, RGN_OR );
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else RedrawWindow( hwnd, NULL, hrgn, RDW_INVALIDATE | RDW_ERASE );
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DeleteObject( hrgn );
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}
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/* Take into account the fact that some damages may have occured during the scroll */
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hrgnTemp = CreateRectRgn( 0, 0, 0, 0 );
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if (GetUpdateRgn( hwnd, hrgnTemp, FALSE ) != NULLREGION)
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{
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OffsetRgn( hrgnTemp, dx, dy );
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CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND );
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RedrawWindow( hwnd, NULL, hrgnTemp, RDW_INVALIDATE | RDW_ERASE );
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}
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DeleteObject( hrgnTemp );
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if( flags & SW_SCROLLCHILDREN )
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{
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HWND *list = WIN_ListChildren( hwnd );
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if (list)
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{
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int i;
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RECT r, dummy;
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for (i = 0; list[i]; i++)
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{
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GetWindowRect( list[i], &r );
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MapWindowPoints( 0, hwnd, (POINT *)&r, 2 );
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if (!rect || IntersectRect(&dummy, &r, &rc))
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SetWindowPos( list[i], 0, r.left + dx, r.top + dy, 0, 0,
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SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE |
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SWP_NOREDRAW | SWP_DEFERERASE );
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}
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HeapFree( GetProcessHeap(), 0, list );
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}
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}
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if( flags & (SW_INVALIDATE | SW_ERASE) )
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RedrawWindow( hwnd, NULL, hrgnUpdate, RDW_INVALIDATE | RDW_ERASE |
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((flags & SW_ERASE) ? RDW_ERASENOW : 0) |
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((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 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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}
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return retVal;
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}
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