usr/src/lib/libcurses/screen/mvderwin.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 /*
  48  * Move a derived window inside its parent window.
  49  * This routine does not change the screen relative
  50  * parameters begx and begy. Thus, it can be used to
  51  * display different parts of the parent window at
  52  * the same screen coordinate.
  53  */
  54
  55 int
  56 mvderwin(WINDOW *win, int pary, int parx)
  57 {
  58         int     y, maxy;
  59         WINDOW  *par;
  60         chtype  obkgd, **wc, **pc;
  61         short   *begch, *endch, maxx;
  62
  63         if ((par = win->_parent) == NULL)
  64                 goto bad;
  65         if (pary == win->_pary && parx == win->_parx)
  66                 return (OK);
  67
  68         maxy = win->_maxy-1;
  69         maxx = win->_maxx-1;
  70         if ((parx + maxx) >= par->_maxx || (pary + maxy) >= par->_maxy)
  71 bad:
  72                 return (ERR);
  73
  74         /* save all old changes */
  75         wsyncup(win);
  76
  77         /* rearrange pointers */
  78         /*LINTED*/
  79         win->_parx = (short) parx;
  80         /*LINTED*/
  81         win->_pary = (short) pary;
  82         wc = win->_y;
  83         pc = par->_y + pary;
  84         begch = win->_firstch;
  85         endch = win->_lastch;
  86         for (y = 0; y <= maxy; ++y, ++wc, ++pc, ++begch, ++endch) {
  87                 *wc = *pc + parx;
  88                 *begch = 0;
  89                 *endch = maxx;
  90         }
  91
  92         /* change background to our own */
  93         obkgd = win->_bkgd;
  94         win->_bkgd = par->_bkgd;
  95         return (wbkgd(win, obkgd));
  96 }