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Commit | Line | Data |
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a5e9f3d2 OZ |
1 | /* |
2 | * BIRD Client - Readline variant I/O | |
3 | * | |
4 | * (c) 1999--2004 Martin Mares <mj@ucw.cz> | |
5 | * | |
6 | * Can be freely distributed and used under the terms of the GNU GPL. | |
7 | */ | |
8 | ||
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <unistd.h> | |
12 | #include <termios.h> | |
13 | ||
14 | #include <readline/readline.h> | |
15 | #include <readline/history.h> | |
16 | #include <curses.h> | |
17 | ||
18 | #include "nest/bird.h" | |
19 | #include "lib/resource.h" | |
20 | #include "lib/string.h" | |
21 | #include "client/client.h" | |
a5e9f3d2 OZ |
22 | |
23 | static int input_hidden_end; | |
24 | static int prompt_active; | |
25 | ||
26 | /*** Input ***/ | |
27 | ||
28 | /* HACK: libreadline internals we need to access */ | |
29 | extern int _rl_vis_botlin; | |
30 | extern void _rl_move_vert(int); | |
a5e9f3d2 | 31 | |
b880e3ff JMM |
32 | #define HISTORY "/.birdc_history" |
33 | static char *history_file; | |
34 | ||
a5e9f3d2 OZ |
35 | static void |
36 | add_history_dedup(char *cmd) | |
37 | { | |
38 | /* Add history line if it differs from the last one */ | |
39 | HIST_ENTRY *he = history_get(history_length); | |
40 | if (!he || strcmp(he->line, cmd)) | |
41 | add_history(cmd); | |
42 | } | |
43 | ||
44 | static void | |
45 | input_got_line(char *cmd_buffer) | |
46 | { | |
47 | if (!cmd_buffer) | |
48 | { | |
49 | cleanup(); | |
50 | exit(0); | |
51 | } | |
52 | ||
53 | if (cmd_buffer[0]) | |
54 | { | |
55 | add_history_dedup(cmd_buffer); | |
56 | submit_command(cmd_buffer); | |
57 | } | |
58 | ||
59 | free(cmd_buffer); | |
60 | } | |
61 | ||
62 | void | |
63 | input_start_list(void) | |
64 | { | |
65 | /* Leave the currently edited line and make space for listing */ | |
66 | _rl_move_vert(_rl_vis_botlin); | |
67 | #ifdef HAVE_RL_CRLF | |
68 | rl_crlf(); | |
69 | #endif | |
70 | } | |
71 | ||
72 | void | |
73 | input_stop_list(void) | |
74 | { | |
75 | /* Reprint the currently edited line after listing */ | |
76 | rl_on_new_line(); | |
77 | rl_redisplay(); | |
78 | } | |
79 | ||
80 | static int | |
81 | input_complete(int arg UNUSED, int key UNUSED) | |
82 | { | |
83 | static int complete_flag; | |
84 | char buf[256]; | |
85 | ||
86 | if (rl_last_func != input_complete) | |
87 | complete_flag = 0; | |
88 | switch (cmd_complete(rl_line_buffer, rl_point, buf, complete_flag)) | |
89 | { | |
90 | case 0: | |
91 | complete_flag = 1; | |
92 | break; | |
93 | case 1: | |
94 | rl_insert_text(buf); | |
95 | break; | |
96 | default: | |
97 | complete_flag = 1; | |
98 | #ifdef HAVE_RL_DING | |
99 | rl_ding(); | |
100 | #endif | |
101 | } | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static int | |
106 | input_help(int arg, int key UNUSED) | |
107 | { | |
108 | int i, in_string, in_bracket; | |
109 | ||
110 | if (arg != 1) | |
111 | return rl_insert(arg, '?'); | |
112 | ||
113 | in_string = in_bracket = 0; | |
114 | for (i = 0; i < rl_point; i++) | |
115 | { | |
116 | ||
117 | if (rl_line_buffer[i] == '"') | |
118 | in_string = ! in_string; | |
119 | else if (! in_string) | |
120 | { | |
121 | if (rl_line_buffer[i] == '[') | |
122 | in_bracket++; | |
123 | else if (rl_line_buffer[i] == ']') | |
124 | in_bracket--; | |
125 | } | |
126 | } | |
127 | ||
128 | /* `?' inside string or path -> insert */ | |
129 | if (in_string || in_bracket) | |
130 | return rl_insert(1, '?'); | |
131 | ||
132 | rl_begin_undo_group(); /* HACK: We want to display `?' at point position */ | |
133 | rl_insert_text("?"); | |
134 | rl_redisplay(); | |
135 | rl_end_undo_group(); | |
136 | input_start_list(); | |
137 | cmd_help(rl_line_buffer, rl_point); | |
138 | rl_undo_command(1, 0); | |
139 | input_stop_list(); | |
140 | return 0; | |
141 | } | |
142 | ||
b880e3ff JMM |
143 | void |
144 | history_init(void) | |
145 | { | |
146 | const char *homedir = getenv("HOME"); | |
147 | if (!homedir) | |
148 | homedir = "."; | |
149 | history_file = malloc(strlen(homedir) + sizeof(HISTORY)); | |
150 | if (!history_file) | |
151 | die("couldn't alloc enough memory for history file name"); | |
152 | ||
153 | sprintf(history_file, "%s%s", homedir, HISTORY); | |
154 | read_history(history_file); | |
155 | } | |
156 | ||
a5e9f3d2 OZ |
157 | void |
158 | input_init(void) | |
159 | { | |
31874783 JMM |
160 | if (interactive) |
161 | history_init(); | |
a5e9f3d2 OZ |
162 | rl_readline_name = "birdc"; |
163 | rl_add_defun("bird-complete", input_complete, '\t'); | |
164 | rl_add_defun("bird-help", input_help, '?'); | |
165 | rl_callback_handler_install("bird> ", input_got_line); | |
166 | ||
167 | // rl_get_screen_size(); | |
4d4979c6 OZ |
168 | term_lns = LINES; |
169 | term_cls = COLS; | |
a5e9f3d2 OZ |
170 | |
171 | prompt_active = 1; | |
172 | ||
173 | // readline library does strange things when stdin is nonblocking. | |
174 | // if (fcntl(0, F_SETFL, O_NONBLOCK) < 0) | |
3f2c7600 | 175 | // DIE("fcntl"); |
a5e9f3d2 OZ |
176 | } |
177 | ||
178 | static void | |
179 | input_reveal(void) | |
180 | { | |
181 | /* need this, otherwise some lib seems to eat pending output when | |
182 | the prompt is displayed */ | |
183 | fflush(stdout); | |
184 | tcdrain(STDOUT_FILENO); | |
185 | ||
186 | rl_end = input_hidden_end; | |
187 | rl_expand_prompt("bird> "); | |
188 | rl_forced_update_display(); | |
189 | ||
190 | prompt_active = 1; | |
191 | } | |
192 | ||
193 | static void | |
194 | input_hide(void) | |
195 | { | |
196 | input_hidden_end = rl_end; | |
197 | rl_end = 0; | |
198 | rl_expand_prompt(""); | |
199 | rl_redisplay(); | |
200 | ||
201 | prompt_active = 0; | |
202 | } | |
203 | ||
204 | void | |
205 | input_notify(int prompt) | |
206 | { | |
207 | if (prompt == prompt_active) | |
208 | return; | |
209 | ||
210 | if (prompt) | |
211 | input_reveal(); | |
212 | else | |
213 | input_hide(); | |
214 | } | |
215 | ||
216 | void | |
217 | input_read(void) | |
218 | { | |
219 | rl_callback_read_char(); | |
220 | } | |
221 | ||
222 | void | |
223 | more_begin(void) | |
224 | { | |
225 | } | |
226 | ||
227 | void | |
228 | more_end(void) | |
229 | { | |
230 | } | |
231 | ||
232 | void | |
233 | cleanup(void) | |
234 | { | |
235 | if (init) | |
236 | return; | |
237 | ||
238 | input_hide(); | |
31874783 JMM |
239 | if (interactive) |
240 | write_history(history_file); | |
a5e9f3d2 OZ |
241 | rl_callback_handler_remove(); |
242 | } |