lib/libcurses/curs_set.c

   1 /*      $NetBSD: curs_set.c,v 1.10 2011/03/30 09:47:02 blymn Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1998-2000 Brett Lymn
   5  *                         (blymn@baea.com.au, brett_lymn@yahoo.com.au)
   6  * All rights reserved.
   7  *
   8  * This code has been donated to The NetBSD Foundation by the Author.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  *
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __RCSID("$NetBSD: curs_set.c,v 1.10 2011/03/30 09:47:02 blymn Exp $");
  35 #endif                          /* not lint */
  36
  37 #include "curses.h"
  38 #include "curses_private.h"
  39
  40 /*
  41  * curs_set --
  42  *    Set the visibility of the cursor, 0 means invisible, 1 means normal
  43  *    visibility and 2 means high visibility.  Return the previous
  44  *    visibility iff the terminal supports the new visibility otherwise
  45  *    return ERR.
  46  */
  47 int
  48 curs_set(int visibility)
  49 {
  50         int old_one;
  51
  52         old_one = _cursesi_screen->old_mode;
  53         switch (visibility) {
  54                 case 0: /* invisible */
  55                         if (cursor_invisible != NULL) {
  56 #ifdef DEBUG
  57                                 __CTRACE(__CTRACE_MISC,
  58                                     "curs_set: invisible\n");
  59 #endif
  60                                 _cursesi_screen->old_mode = 0;
  61                                 tputs(cursor_invisible, 0, __cputchar);
  62                                 fflush(_cursesi_screen->outfd);
  63                                 return old_one;
  64                         }
  65                         break;
  66
  67                 case 1: /* normal */
  68                         if (cursor_normal != NULL) {
  69 #ifdef DEBUG
  70                                 __CTRACE(__CTRACE_MISC, "curs_set: normal\n");
  71 #endif
  72                                 _cursesi_screen->old_mode = 1;
  73                                 tputs(cursor_normal, 0, __cputchar);
  74                                 fflush(_cursesi_screen->outfd);
  75                                 return old_one;
  76                         }
  77                         break;
  78
  79                 case 2: /* high visibility */
  80                         if (cursor_visible != NULL) {
  81 #ifdef DEBUG
  82                                 __CTRACE(__CTRACE_MISC,
  83                                     "curs_set: high vis\n");
  84 #endif
  85                                 _cursesi_screen->old_mode = 2;
  86                                 tputs(cursor_visible, 0, __cputchar);
  87                                 fflush(_cursesi_screen->outfd);
  88                                 return old_one;
  89                         }
  90                         break;
  91
  92                 default:
  93                         break;
  94         }
  95
  96         return ERR;
  97 }
  98
  99 /*
 100  * __restore_cursor_vis --
 101  *     Restore the old cursor visibility.
 102  */
 103 void
 104 __restore_cursor_vis(void)
 105 {
 106         curs_set(_cursesi_screen->old_mode);
 107 }
 108