1 /****************************************************************************
2 * Copyright 2019-2020,2021 Thomas E. Dickey *
3 * Copyright 1998-2012,2014 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /****************************************************************************
31 * Author: Thomas E. Dickey 1997-on *
32 * and: Juergen Pfeifer 2009 *
33 ****************************************************************************/
34
35 #include <curses.priv.h>
36
37 MODULE_ID("$Id: keyok.c,v 1.17 2021/06/17 21:26:02 tom Exp $")
38
39 /*
40 * Enable (or disable) ncurses' interpretation of a keycode by adding (or
41 * removing) the corresponding 'tries' entry.
42 *
43 * Do this by storing a second tree of tries, which records the disabled keys.
44 * The simplest way to copy is to make a function that returns the string (with
45 * nulls set to 0200), then use that to reinsert the string into the
46 * corresponding tree.
47 */
48
NCURSES_EXPORT(int)49 NCURSES_EXPORT(int)
50 NCURSES_SP_NAME(keyok) (NCURSES_SP_DCLx int c, bool flag)
51 {
52 int code = ERR;
53
54 if (HasTerminal(SP_PARM)) {
55 T((T_CALLED("keyok(%p, %d,%d)"), (void *) SP_PARM, c, flag));
56 #ifdef USE_TERM_DRIVER
57 code = CallDriver_2(sp, td_kyOk, c, flag);
58 #else
59 if (c >= 0) {
60 int count = 0;
61 char *s;
62 unsigned ch = (unsigned) c;
63
64 if (flag) {
65 while ((s = _nc_expand_try(SP_PARM->_key_ok,
66 ch, &count, (size_t) 0)) != 0) {
67 if (_nc_remove_key(&(SP_PARM->_key_ok), ch)) {
68 code = _nc_add_to_try(&(SP_PARM->_keytry), s, ch);
69 free(s);
70 count = 0;
71 if (code != OK)
72 break;
73 } else {
74 free(s);
75 }
76 }
77 } else {
78 while ((s = _nc_expand_try(SP_PARM->_keytry,
79 ch, &count, (size_t) 0)) != 0) {
80 if (_nc_remove_key(&(SP_PARM->_keytry), ch)) {
81 code = _nc_add_to_try(&(SP_PARM->_key_ok), s, ch);
82 free(s);
83 count = 0;
84 if (code != OK)
85 break;
86 } else {
87 free(s);
88 }
89 }
90 }
91 }
92 #endif
93 }
94 returnCode(code);
95 }
96
97 #if NCURSES_SP_FUNCS
98 NCURSES_EXPORT(int)
keyok(int c,bool flag)99 keyok(int c, bool flag)
100 {
101 return NCURSES_SP_NAME(keyok) (CURRENT_SCREEN, c, flag);
102 }
103 #endif
104