usr/src/ucblib/libcurses/toucholap.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[] = "@(#)toucholap.c 1.4 89/08/03 SMI"; /* from UCB 5.1 85/06/07 */
  22 #endif  /* not lint */
  23
  24 #include        "curses.ext"
  25
  26 #define min(a, b)       ((a) < (b) ? (a) : (b))
  27 #define max(a, b)       ((a) > (b) ? (a) : (b))
  28
  29 /*
  30  *      Touch, on win2, the part that overlaps with win1.
  31  */
  32
  33 int
  34 touchoverlap(WINDOW *win1, WINDOW *win2)
  35 {
  36         int     y, endy, endx, starty, startx;
  37
  38 #ifdef DEBUG
  39         fprintf(outf, "TOUCHOVERLAP(%0.2o, %0.2o);\n", win1, win2);
  40 #endif
  41         starty = max(win1->_begy, win2->_begy);
  42         startx = max(win1->_begx, win2->_begx);
  43         endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
  44         endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
  45 #ifdef DEBUG
  46         fprintf(outf, "TOUCHOVERLAP:from (%d,%d) to (%d,%d)\n",
  47             starty, startx, endy, endx);
  48         fprintf(outf, "TOUCHOVERLAP:win1 (%d,%d) to (%d,%d)\n",
  49             win1->_begy, win1->_begx, win1->_begy + win1->_maxy,
  50             win1->_begx + win1->_maxx);
  51         fprintf(outf, "TOUCHOVERLAP:win2 (%d,%d) to (%d,%d)\n",
  52             win2->_begy, win2->_begx, win2->_begy + win2->_maxy,
  53             win2->_begx + win2->_maxx);
  54 #endif
  55         if (starty >= endy || startx >= endx)
  56                 return (OK);
  57         starty -= win2->_begy;
  58         startx -= win2->_begx;
  59         endy -= win2->_begy;
  60         endx -= win2->_begx;
  61         endx--;
  62         for (y = starty; y < endy; y++)
  63                 (void) touchline(win2, y, startx, endx);
  64         return (OK);
  65 }