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tetex-bin  3.0
keyok.c
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00001 /****************************************************************************
00002  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
00003  *                                                                          *
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00011  *                                                                          *
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00028 
00029 /****************************************************************************
00030  *  Author: Thomas E. Dickey <dickey@clark.net> 1997                        *
00031  ****************************************************************************/
00032 
00033 #include <curses.priv.h>
00034 
00035 MODULE_ID("$Id: keyok.c,v 1.5 2000/12/10 02:43:26 tom Exp $")
00036 
00037 /*
00038  * Enable (or disable) ncurses' interpretation of a keycode by adding (or
00039  * removing) the corresponding 'tries' entry.
00040  *
00041  * Do this by storing a second tree of tries, which records the disabled keys. 
00042  * The simplest way to copy is to make a function that returns the string (with
00043  * nulls set to 0200), then use that to reinsert the string into the
00044  * corresponding tree.
00045  */
00046 
00047 NCURSES_EXPORT(int)
00048 keyok(int c, bool flag)
00049 {
00050     int code = ERR;
00051     int count = 0;
00052     char *s;
00053 
00054     T((T_CALLED("keyok(%d,%d)"), c, flag));
00055     if (flag) {
00056        while ((s = _nc_expand_try(SP->_key_ok, c, &count, 0)) != 0
00057               && _nc_remove_key(&(SP->_key_ok), c)) {
00058            _nc_add_to_try(&(SP->_keytry), s, c);
00059            free(s);
00060            code = OK;
00061            count = 0;
00062        }
00063     } else {
00064        while ((s = _nc_expand_try(SP->_keytry, c, &count, 0)) != 0
00065               && _nc_remove_key(&(SP->_keytry), c)) {
00066            _nc_add_to_try(&(SP->_key_ok), s, c);
00067            free(s);
00068            code = OK;
00069            count = 0;
00070        }
00071     }
00072     returnCode(code);
00073 }