usr/src/lib/libcurses/screen/wgetch.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*LINTLIBRARY*/
  43
  44 #include        <sys/types.h>
  45 #include        "curses_inc.h"
  46 #ifdef  DEBUG
  47 #include        <ctype.h>
  48 #endif  /* DEBUG */
  49
  50 /*
  51  * This routine reads in a character from the window.
  52  *
  53  * wgetch MUST return an int, not a char, because it can return
  54  * things like ERR, meta characters, and function keys > 256.
  55  */
  56
  57 int
  58 wgetch(WINDOW *win)
  59 {
  60         int     inp;
  61         bool            weset = FALSE;
  62
  63 #ifdef  DEBUG
  64         if (outf) {
  65                 fprintf(outf, "WGETCH: SP->fl_echoit = %c\n",
  66                     SP->fl_echoit ? 'T' : 'F');
  67                 fprintf(outf, "_use_keypad %d, kp_state %d\n",
  68                     win->_use_keypad, SP->kp_state);
  69                 fprintf(outf, "file %x fd %d\n", SP->input_file,
  70                     fileno(SP->input_file));
  71         }
  72 #endif  /* DEBUG */
  73
  74         if (SP->fl_echoit && cur_term->_fl_rawmode == 0) {
  75                 (void) cbreak();
  76                 weset++;
  77         }
  78
  79         /* Make sure we are in proper nodelay state and not */
  80         /* in halfdelay state */
  81         if (cur_term->_delay <= 0 && cur_term->_delay != win->_delay)
  82                 (void) ttimeout(win->_delay);
  83
  84         if ((win->_flags & (_WINCHANGED | _WINMOVED)) && !(win->_flags &
  85             _ISPAD))
  86                 (void) wrefresh(win);
  87
  88         if ((cur_term->_ungotten == 0) && (req_for_input)) {
  89                 (void) tputs(req_for_input, 1, _outch);
  90                 (void) fflush(SP->term_file);
  91         }
  92         inp = (int)tgetch((int)(win->_use_keypad ? 1 + win->_notimeout : 0));
  93
  94         /* echo the key out to the screen */
  95         if (SP->fl_echoit && (inp < 0200) && (inp >= 0) && !(win->_flags &
  96             _ISPAD))
  97                 (void) wechochar(win, (chtype) inp);
  98
  99         /*
 100          * Do nl() mapping. nl() affects both input and output. Since
 101          * we turn off input mapping of CR->NL to not affect input
 102          * virtualization, we do the mapping here in software.
 103          */
 104         if (inp == '\r' && !SP->fl_nonl)
 105                 inp = '\n';
 106
 107         if (weset)
 108                 (void) nocbreak();
 109
 110         return (inp);
 111 }