usr/src/lib/libcurses/screen/wsyncup.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 /* Sync the changes in a window with its ancestors. */
  48
  49 void
  50 wsyncup(WINDOW *win)
  51 {
  52         short   *wbch, *wech, *pbch, *pech, bch, ech;
  53         int     wy, px, py, endy;
  54         WINDOW  *par;
  55
  56         for (par = win->_parent; par != NULL; win = par, par = par->_parent) {
  57                 py = win->_pary;
  58                 px = win->_parx;
  59                 endy = win->_maxy;
  60
  61                 wbch = win->_firstch;
  62                 wech = win->_lastch;
  63                 pbch = par->_firstch+ py;
  64                 pech = par->_lastch+ py;
  65
  66                 /*
  67                  * I don't think we need check WINCHANGED first.
  68                  * The reasoning is that all internal calls will have come
  69                  * from a function that did change the window.  And assumably
  70                  * all external calls will work the same way.
  71                  */
  72                 par->_flags |= _WINCHANGED;
  73                 /* check each line */
  74                 for (wy = 0; wy < endy; ++wy, ++wbch, ++wech, ++pbch, ++pech)
  75                         if (*wbch != _INFINITY) {
  76                                 bch = px + *wbch;
  77                                 ech = px + *wech;
  78                                 if (*pbch > bch)
  79                                         *pbch = bch;
  80                                 if (*pech < ech)
  81                                         *pech = ech;
  82                         }
  83         }
  84 }
  85
  86 void
  87 wcursyncup(WINDOW *win)
  88 {
  89         WINDOW  *par = win->_parent;
  90
  91         while (par != NULL) {
  92                 par->_cury = win->_cury + win->_pary;
  93                 par->_curx = win->_curx + win->_parx;
  94                 par = (win = par)->_parent;
  95         }
  96 }