usr/src/ucblib/libcurses/touchwin.c

   1 /*
   2  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
   7 /*        All Rights Reserved   */
   8
   9 /*
  10  * Copyright (c) 1980 Regents of the University of California.
  11  * All rights reserved.  The Berkeley software License Agreement
  12  * specifies the terms and conditions for redistribution.
  13  */
  14
  15 #pragma ident   "%Z%%M% %I%     %E% SMI"
  16
  17 /*LINTLIBRARY*/
  18
  19 #ifndef lint
  20 static char
  21 sccsid[] = "@(#)touchwin.c 1.6 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
  22 #endif  /* not lint */
  23
  24 #include        "curses.ext"
  25
  26 /*
  27  * make it look like the whole window has been changed.
  28  *
  29  */
  30
  31 int
  32 touchwin(WINDOW *win)
  33 {
  34         int     y, maxy;
  35
  36 #ifdef  DEBUG
  37         fprintf(outf, "TOUCHWIN(%0.2o)\n", win);
  38 #endif
  39         maxy = win->_maxy;
  40         for (y = 0; y < maxy; y++)
  41                 (void) touchline(win, y, 0, win->_maxx - 1);
  42         return (OK);
  43 }
  44
  45 /*
  46  * touch a given line
  47  */
  48
  49 int
  50 touchline(WINDOW *win, int y, int sx, int ex)
  51 {
  52 #ifdef DEBUG
  53         fprintf(outf, "TOUCHLINE(%0.2o, %d, %d, %d)\n", win, y, sx, ex);
  54         fprintf(outf, "TOUCHLINE:first = %d, last = %d\n",
  55             win->_firstch[y], win->_lastch[y]);
  56 #endif
  57         sx += win->_ch_off;
  58         ex += win->_ch_off;
  59         if (win->_firstch[y] == _NOCHANGE) {
  60                 win->_firstch[y] = (short)sx;
  61                 win->_lastch[y] = (short)ex;
  62         } else {
  63                 if (win->_firstch[y] > sx)
  64                         win->_firstch[y] = (short)sx;
  65                 if (win->_lastch[y] < ex)
  66                         win->_lastch[y] = (short)ex;
  67         }
  68 #ifdef  DEBUG
  69         fprintf(outf, "TOUCHLINE:first = %d, last = %d\n",
  70             win->_firstch[y], win->_lastch[y]);
  71 #endif
  72         return (OK);
  73 }