Annotation of embedaddon/readline/parens.c, revision 1.1.1.2
1.1 misho 1: /* parens.c -- implementation of matching parentheses feature. */
2:
1.1.1.2 ! misho 3: /* Copyright (C) 1987, 1989, 1992-2015, 2017 Free Software Foundation, Inc.
1.1 misho 4:
5: This file is part of the GNU Readline Library (Readline), a library
6: for reading lines of text with interactive input and history editing.
7:
8: Readline is free software: you can redistribute it and/or modify
9: it under the terms of the GNU General Public License as published by
10: the Free Software Foundation, either version 3 of the License, or
11: (at your option) any later version.
12:
13: Readline is distributed in the hope that it will be useful,
14: but WITHOUT ANY WARRANTY; without even the implied warranty of
15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: GNU General Public License for more details.
17:
18: You should have received a copy of the GNU General Public License
19: along with Readline. If not, see <http://www.gnu.org/licenses/>.
20: */
21:
22: #define READLINE_LIBRARY
23:
24: #if defined (__TANDEM)
25: # include <floss.h>
26: #endif
27:
28: #include "rlconf.h"
29:
30: #if defined (HAVE_CONFIG_H)
31: # include <config.h>
32: #endif
33:
34: #include <stdio.h>
35: #include <sys/types.h>
36:
37: #if defined (HAVE_UNISTD_H)
38: # include <unistd.h>
39: #endif
40:
41: #include "posixselect.h"
42:
43: #if defined (HAVE_STRING_H)
44: # include <string.h>
45: #else /* !HAVE_STRING_H */
46: # include <strings.h>
47: #endif /* !HAVE_STRING_H */
48:
49: #if !defined (strchr) && !defined (__STDC__)
50: extern char *strchr (), *strrchr ();
51: #endif /* !strchr && !__STDC__ */
52:
53: #include "readline.h"
54: #include "rlprivate.h"
55:
56: static int find_matching_open PARAMS((char *, int, int));
57:
58: /* Non-zero means try to blink the matching open parenthesis when the
59: close parenthesis is inserted. */
60: int rl_blink_matching_paren = 0;
61:
62: static int _paren_blink_usec = 500000;
63:
64: /* Change emacs_standard_keymap to have bindings for paren matching when
65: ON_OR_OFF is 1, change them back to self_insert when ON_OR_OFF == 0. */
66: void
1.1.1.2 ! misho 67: _rl_enable_paren_matching (int on_or_off)
1.1 misho 68: {
69: if (on_or_off)
1.1.1.2 ! misho 70: {
! 71: /* ([{ */
1.1 misho 72: rl_bind_key_in_map (')', rl_insert_close, emacs_standard_keymap);
73: rl_bind_key_in_map (']', rl_insert_close, emacs_standard_keymap);
74: rl_bind_key_in_map ('}', rl_insert_close, emacs_standard_keymap);
1.1.1.2 ! misho 75:
! 76: #if defined (VI_MODE)
! 77: /* ([{ */
! 78: rl_bind_key_in_map (')', rl_insert_close, vi_insertion_keymap);
! 79: rl_bind_key_in_map (']', rl_insert_close, vi_insertion_keymap);
! 80: rl_bind_key_in_map ('}', rl_insert_close, vi_insertion_keymap);
! 81: #endif
1.1 misho 82: }
83: else
1.1.1.2 ! misho 84: {
! 85: /* ([{ */
1.1 misho 86: rl_bind_key_in_map (')', rl_insert, emacs_standard_keymap);
87: rl_bind_key_in_map (']', rl_insert, emacs_standard_keymap);
88: rl_bind_key_in_map ('}', rl_insert, emacs_standard_keymap);
1.1.1.2 ! misho 89:
! 90: #if defined (VI_MODE)
! 91: /* ([{ */
! 92: rl_bind_key_in_map (')', rl_insert, vi_insertion_keymap);
! 93: rl_bind_key_in_map (']', rl_insert, vi_insertion_keymap);
! 94: rl_bind_key_in_map ('}', rl_insert, vi_insertion_keymap);
! 95: #endif
1.1 misho 96: }
97: }
98:
99: int
1.1.1.2 ! misho 100: rl_set_paren_blink_timeout (int u)
1.1 misho 101: {
102: int o;
103:
104: o = _paren_blink_usec;
105: if (u > 0)
106: _paren_blink_usec = u;
107: return (o);
108: }
109:
110: int
1.1.1.2 ! misho 111: rl_insert_close (int count, int invoking_key)
1.1 misho 112: {
113: if (rl_explicit_arg || !rl_blink_matching_paren)
114: _rl_insert_char (count, invoking_key);
115: else
116: {
117: #if defined (HAVE_SELECT)
118: int orig_point, match_point, ready;
119: struct timeval timer;
120: fd_set readfds;
121:
122: _rl_insert_char (1, invoking_key);
123: (*rl_redisplay_function) ();
124: match_point =
125: find_matching_open (rl_line_buffer, rl_point - 2, invoking_key);
126:
127: /* Emacs might message or ring the bell here, but I don't. */
128: if (match_point < 0)
1.1.1.2 ! misho 129: return 1;
1.1 misho 130:
131: FD_ZERO (&readfds);
132: FD_SET (fileno (rl_instream), &readfds);
133: USEC_TO_TIMEVAL (_paren_blink_usec, timer);
134:
135: orig_point = rl_point;
136: rl_point = match_point;
137: (*rl_redisplay_function) ();
138: ready = select (1, &readfds, (fd_set *)NULL, (fd_set *)NULL, &timer);
139: rl_point = orig_point;
140: #else /* !HAVE_SELECT */
141: _rl_insert_char (count, invoking_key);
142: #endif /* !HAVE_SELECT */
143: }
144: return 0;
145: }
146:
147: static int
1.1.1.2 ! misho 148: find_matching_open (char *string, int from, int closer)
1.1 misho 149: {
150: register int i;
151: int opener, level, delimiter;
152:
153: switch (closer)
154: {
155: case ']': opener = '['; break;
156: case '}': opener = '{'; break;
157: case ')': opener = '('; break;
158: default:
159: return (-1);
160: }
161:
162: level = 1; /* The closer passed in counts as 1. */
163: delimiter = 0; /* Delimited state unknown. */
164:
165: for (i = from; i > -1; i--)
166: {
167: if (delimiter && (string[i] == delimiter))
168: delimiter = 0;
169: else if (rl_basic_quote_characters && strchr (rl_basic_quote_characters, string[i]))
170: delimiter = string[i];
171: else if (!delimiter && (string[i] == closer))
172: level++;
173: else if (!delimiter && (string[i] == opener))
174: level--;
175:
176: if (!level)
177: break;
178: }
179: return (i);
180: }
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