2 // Copyright (c) 2010-2017 Intel Corporation
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
8 // http://www.apache.org/licenses/LICENSE-2.0
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
27 #include "cmd_parser.h"
28 #include "input_curses.h"
31 #include "libedit_autoconf.h"
36 static struct input input_curses;
39 static void show_history(struct input *input)
43 history(hist, &event, H_LAST);
46 plog_info("%s", event.str); /* event.str contains newline */
47 } while (history(hist, &event, H_PREV) != -1);
50 static int complete(__attribute__((unused)) int ch)
55 char complete_cmd[128] = {0};
56 int complete_cmd_partial = 0;
59 for (size_t i = 0; i < cmd_parser_n_cmd(); ++i) {
60 len = li->lastchar - li->buffer;
61 if (strncmp(cmd_parser_cmd(i), li->buffer, len) == 0) {
63 size_t cur_len = strlen(complete_cmd);
64 for (size_t j = 0; j < cur_len; ++j) {
65 if (complete_cmd[j] != cmd_parser_cmd(i)[j]) {
67 complete_cmd_partial = 1;
73 strcpy(complete_cmd, cmd_parser_cmd(i));
80 /* Complete only if there are more characters known than
82 if (n_match && len < strlen(complete_cmd)) {
83 el_deletestr(el, li->cursor - li->buffer);
84 el_insertstr(el, complete_cmd);
85 if (!complete_cmd_partial)
86 el_insertstr(el, " ");
92 for (size_t i = 0; i < cmd_parser_n_cmd(); ++i) {
93 len = li->lastchar - li->buffer;
94 if (strncmp(cmd_parser_cmd(i), li->buffer, len) == 0) {
95 plog_info("%-23s", cmd_parser_cmd(i));
113 /* Returns non-zero if stdin is readable */
114 static int peek_stdin(void)
124 FD_SET(fileno(stdin), &in_fd);
125 tmp = select(fileno(stdin) + 1, &in_fd, NULL, NULL, &tv);
126 return FD_ISSET(fileno(stdin), &in_fd);
129 #ifdef HAVE_LIBEDIT_EL_RFUNC_T
130 static int do_get_char(EditLine *e, wchar_t *c)
132 static int get_char(EditLine *e, char *c)
135 *c = display_getch();
137 /* If no characters have been entered, number keys switch the
138 screen and '0' resets stats. This is provided as a
139 fall-back in case F-keys do not function. The keys are
140 intercepted before returning control to libedit. */
141 if (*c >= '0' && *c <= '9') {
145 if (li->lastchar == li->buffer) {
147 display_screen(*c - '0' - 1);
151 cmd_parser_parse("reset stats", &input_curses);
157 toggle_display_screen();
161 /* Escape by itself is the first character used for more
162 complex escape sequences like F-keys. libedit can't be used
163 to detect both ESC as a unitary key and more complex
164 sequences starting ESC at the same time. */
165 if (*c == 27 && !peek_stdin()) {
176 #ifdef HAVE_LIBEDIT_EL_RFUNC_T
177 static el_rfunc_t get_char = &do_get_char;
180 static void proc_keyboard(struct input *input)
184 HistEvent hist_event;
187 line = el_gets(el, &len);
190 if (len == 0 || line == NULL) {
191 display_cmd("", 0, 0);
193 } else if (len > 0) {
194 if (len == 1 && line[0] == '\n') {
195 display_print_page();
196 el_set(el, EL_UNBUFFERED, 0);
197 el_set(el, EL_UNBUFFERED, 1);
200 if (line[len-1] == '\n') {
202 history(hist, &hist_event, H_ENTER, line);
205 char *line2 = strndup(line, len);
206 line2[len - 1] = 0; /* replace \n */
207 cmd_parser_parse(line2, input);
210 el_set(el, EL_UNBUFFERED, 0);
211 el_set(el, EL_UNBUFFERED, 1);
212 display_cmd("", 0, 0);
215 if (line[len-1] == 4) {
216 return; /* should quit*/
223 display_cmd("", 0, 0);
226 display_cmd(line, len, li->cursor - li->buffer);
229 static int key_f1(__attribute__((unused)) int ch) {display_screen(0); return CC_REDISPLAY;}
230 static int key_f2(__attribute__((unused)) int ch) {display_screen(1); return CC_REDISPLAY;}
231 static int key_f3(__attribute__((unused)) int ch) {display_screen(2); return CC_REDISPLAY;}
232 static int key_f4(__attribute__((unused)) int ch) {display_screen(3); return CC_REDISPLAY;}
233 static int key_f5(__attribute__((unused)) int ch) {display_screen(4); return CC_REDISPLAY;}
234 static int key_f6(__attribute__((unused)) int ch) {display_screen(5); return CC_REDISPLAY;}
235 static int key_f7(__attribute__((unused)) int ch) {display_screen(6); return CC_REDISPLAY;}
236 static int key_f8(__attribute__((unused)) int ch) {display_screen(7); return CC_REDISPLAY;}
237 static int key_f9(__attribute__((unused)) int ch) {display_screen(8); return CC_REDISPLAY;}
238 static int key_f10(__attribute__((unused)) int ch) {display_screen(9); return CC_REDISPLAY;}
239 static int key_f11(__attribute__((unused)) int ch) {display_screen(10); return CC_REDISPLAY;}
240 static int key_f12(__attribute__((unused)) int ch) {display_screen(11); return CC_REDISPLAY;}
242 static int key_page_up(__attribute__((unused)) int ch) {display_page_up(); return CC_REDISPLAY;}
243 static int key_page_down(__attribute__((unused)) int ch) {display_page_down(); return CC_REDISPLAY;}
245 static void setup_el(void)
249 HistEvent hist_event;
251 /* Open a pseudo-terminal for use in libedit. This is required
252 since the library checks if it is using a tty. If the file
253 descriptor does not represent a tty, the library disables
256 pty = posix_openpt(O_RDWR);
257 /* TODO: On error (posix_openpt() < 0), fall-back to
258 non-libedit implementation. */
261 dev_pty = fdopen(pty, "wr");
263 el = el_init("", dev_pty, dev_pty, dev_pty);
265 el_set(el, EL_EDITOR, "emacs");
267 el_set(el, EL_ADDFN, "complete", "Command completion", complete);
269 el_set(el, EL_ADDFN, "key_f1", "Switch to screen 1", key_f1);
270 el_set(el, EL_ADDFN, "key_f2", "Switch to screen 2", key_f2);
271 el_set(el, EL_ADDFN, "key_f3", "Switch to screen 3", key_f3);
272 el_set(el, EL_ADDFN, "key_f4", "Switch to screen 4", key_f4);
273 el_set(el, EL_ADDFN, "key_f5", "Switch to screen 5", key_f5);
274 el_set(el, EL_ADDFN, "key_f6", "Switch to screen 6", key_f6);
275 el_set(el, EL_ADDFN, "key_f7", "Switch to screen 7", key_f7);
276 el_set(el, EL_ADDFN, "key_f8", "Switch to screen 8", key_f8);
277 el_set(el, EL_ADDFN, "key_f9", "Switch to screen 9", key_f5);
278 el_set(el, EL_ADDFN, "key_f10", "Switch to screen 10", key_f6);
279 el_set(el, EL_ADDFN, "key_f11", "Switch to screen 11", key_f7);
280 el_set(el, EL_ADDFN, "key_f12", "Switch to screen 12", key_f8);
282 el_set(el, EL_ADDFN, "key_page_up", "Page up", key_page_up);
283 el_set(el, EL_ADDFN, "key_page_down", "Page down", key_page_down);
285 el_set(el, EL_BIND, "^I", "complete", NULL);
286 el_set(el, EL_BIND, "^r", "em-inc-search-prev", NULL);
288 el_set(el, EL_BIND, "^[[11~", "key_f1", NULL);
289 el_set(el, EL_BIND, "^[[12~", "key_f2", NULL);
290 el_set(el, EL_BIND, "^[[13~", "key_f3", NULL);
291 el_set(el, EL_BIND, "^[[14~", "key_f4", NULL);
292 el_set(el, EL_BIND, "^[[15~", "key_f5", NULL);
293 el_set(el, EL_BIND, "^[[17~", "key_f6", NULL);
294 el_set(el, EL_BIND, "^[[18~", "key_f7", NULL);
295 el_set(el, EL_BIND, "^[[19~", "key_f8", NULL);
296 el_set(el, EL_BIND, "^[[20~", "key_f9", NULL);
297 el_set(el, EL_BIND, "^[[21~", "key_f10", NULL);
298 el_set(el, EL_BIND, "^[[23~", "key_f11", NULL);
299 el_set(el, EL_BIND, "^[[24~", "key_f12", NULL);
301 el_set(el, EL_BIND, "^[OP", "key_f1", NULL);
302 el_set(el, EL_BIND, "^[OQ", "key_f2", NULL);
303 el_set(el, EL_BIND, "^[OR", "key_f3", NULL);
304 el_set(el, EL_BIND, "^[OS", "key_f4", NULL);
306 el_set(el, EL_BIND, "^[[5~", "key_page_up", NULL);
307 el_set(el, EL_BIND, "^[[6~", "key_page_down", NULL);
309 hist = history_init();
311 history(hist, &hist_event, H_SETSIZE, 1000);
312 el_set(el, EL_HIST, history, hist);
314 el_set(el, EL_UNBUFFERED, 1);
315 el_set(el, EL_GETCFN, get_char);
318 void reg_input_curses(void)
322 input_curses.fd = fileno(stdin);
323 input_curses.proc_input = proc_keyboard;
324 input_curses.history = show_history;
326 reg_input(&input_curses);
329 void unreg_input_curses(void)
334 unreg_input(&input_curses);