ncurses/lib_clreol.c

   1
   2 /***************************************************************************
   3 *                            COPYRIGHT NOTICE                              *
   4 ****************************************************************************
   5 *                ncurses is copyright (C) 1992-1995                        *
   6 *                          Zeyd M. Ben-Halim                               *
   7 *                          zmbenhal@netcom.com                             *
   8 *                          Eric S. Raymond                                 *
   9 *                          esr@snark.thyrsus.com                           *
  10 *                                                                          *
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  21
  22
  23 /*
  24 **      lib_clreol.c
  25 **
  26 **      The routine wclrtoeol().
  27 **
  28 */
  29
  30 #include <curses.priv.h>
  31
  32 MODULE_ID("$Id: lib_clreol.c,v 1.9 1997/02/01 23:22:54 tom Exp $")
  33
  34 int  wclrtoeol(WINDOW *win)
  35 {
  36 chtype  *maxx, *ptr, *end;
  37 short   y, x, minx;
  38
  39         T((T_CALLED("wclrtoeol(%p)"), win));
  40
  41         y = win->_cury;
  42         x = win->_curx;
  43
  44         /*
  45          * We don't want to clear if we just wrapped the cursor.  There's no
  46          * point in clearing if we're not on a legal position, either.
  47          */
  48         if (win->_flags & _WRAPPED
  49          || y > win->_maxy
  50          || x > win->_maxx)
  51                 returnCode(ERR);
  52
  53         end = &win->_line[y].text[win->_maxx];
  54         minx = _NOCHANGE;
  55         maxx = &win->_line[y].text[x];
  56
  57         for (ptr = maxx; ptr <= end; ptr++) {
  58             chtype blank = _nc_background(win);
  59
  60             if (*ptr != blank) {
  61                         maxx = ptr;
  62                         if (minx == _NOCHANGE)
  63                             minx = ptr - win->_line[y].text;
  64                         *ptr = blank;
  65             }
  66         }
  67
  68         if (minx != _NOCHANGE) {
  69             if (win->_line[y].firstchar > minx || win->_line[y].firstchar == _NOCHANGE)
  70                         win->_line[y].firstchar = minx;
  71
  72             if (win->_line[y].lastchar < maxx - win->_line[y].text)
  73                         win->_line[y].lastchar = maxx - win->_line[y].text;
  74         }
  75         _nc_synchook(win);
  76         returnCode(OK);
  77 }