usr/src/lib/libcurses/screen/wclrtobot.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*LINTLIBRARY*/
  43
  44 #include        <sys/types.h>
  45 #include        "curses_inc.h"
  46
  47 /* This routine erases everything on the window. */
  48 int
  49 wclrtobot(WINDOW *win)
  50 {
  51         bool    savimmed, savsync;
  52         int     cury = win->_cury;
  53         short   curx = win->_curx;
  54
  55         if (win != curscr) {
  56                 savimmed = win->_immed;
  57                 savsync = win->_sync;
  58                 win->_immed = win->_sync = FALSE;
  59         }
  60
  61         /* set region to be clear */
  62         if (cury >= win->_tmarg && cury <= win->_bmarg)
  63                 win->_cury = win->_bmarg;
  64         else
  65                 win->_cury = win->_maxy - 1;
  66
  67         win->_curx = 0;
  68         for (; win->_cury > cury; win->_cury--)
  69                 (void) wclrtoeol(win);
  70         win->_curx = curx;
  71         (void) wclrtoeol(win);
  72
  73         if (win == curscr)
  74                 return (OK);
  75
  76         /* not curscr */
  77         win->_sync = savsync;
  78
  79         if (win->_sync)
  80                 wsyncup(win);
  81
  82         win->_flags |= _WINCHANGED;
  83         return ((win->_immed = savimmed) ? wrefresh(win) : OK);
  84 }