lib/curses/wbox.c

   1 #include <curses.h>
   2 #include "curspriv.h"
   3
   4 /****************************************************************/
   5 /* Wbox(win,ymin,xmin,ymax,xmax,v,h) draws a box in window      */
   6 /* 'win', enclosing the area xmin-xmax and ymin-xmax. If        */
   7 /* Xmax and/or ymax is 0, the window max value is used. 'v' and */
   8 /* 'h' are the vertical and horizontal characters to use. If    */
   9 /* 'v' and 'h' are 0, wbox will use the alternate character set */
  10 /* In a pretty way.                                             */
  11 /****************************************************************/
  12
  13 int wbox(win, ymin, xmin, ymax, xmax, v, h)
  14 WINDOW *win;
  15 int ymin, xmin, ymax, xmax;
  16 unsigned int v;
  17 unsigned int h;
  18 {
  19   unsigned int vc, hc, ulc, urc, llc, lrc;      /* corner chars */
  20   int i;
  21
  22   if (ymax == 0) ymax = win->_maxy;
  23   if (xmax == 0) xmax = win->_maxx;
  24
  25   if (ymin >= win->_maxy || ymax > win->_maxy ||
  26       xmin >= win->_maxx || xmax > win->_maxx ||
  27       ymin >= ymax || xmin >= xmax)
  28         return(ERR);
  29
  30   vc = v;
  31   hc = h;
  32   ulc = urc = llc = lrc = vc;   /* default same as vertical */
  33
  34   if (v == 0 && h == 0) {
  35         ulc = ACS_ULCORNER;
  36         urc = ACS_URCORNER;
  37         llc = ACS_LLCORNER;
  38         lrc = ACS_LRCORNER;
  39         hc = ACS_HLINE;
  40         vc = ACS_VLINE;
  41   }
  42   for (i = xmin + 1; i <= xmax - 1; i++) {
  43         win->_line[ymin][i] = hc | win->_attrs;
  44         win->_line[ymax][i] = hc | win->_attrs;
  45   }
  46   for (i = ymin + 1; i <= ymax - 1; i++) {
  47         win->_line[i][xmin] = vc | win->_attrs;
  48         win->_line[i][xmax] = vc | win->_attrs;
  49   }
  50   win->_line[ymin][xmin] = ulc | win->_attrs;
  51   win->_line[ymin][xmax] = urc | win->_attrs;
  52   win->_line[ymax][xmin] = llc | win->_attrs;
  53   win->_line[ymax][xmax] = lrc | win->_attrs;
  54
  55   for (i = ymin; i <= ymax; i++) {
  56         if (win->_minchng[i] == _NO_CHANGE) {
  57                 win->_minchng[i] = xmin;
  58                 win->_maxchng[i] = xmax;
  59         } else {
  60                 win->_minchng[i] = min(win->_minchng[i], xmin);
  61                 win->_maxchng[i] = max(win->_maxchng[i], xmax);
  62         }
  63   }
  64   return(OK);
  65 }