Commit | Line | Data |
---|---|---|
f377b406 | 1 | /* TUI support I/O functions. |
f33c6cbf | 2 | |
32d0add0 | 3 | Copyright (C) 1998-2015 Free Software Foundation, Inc. |
f33c6cbf | 4 | |
f377b406 SC |
5 | Contributed by Hewlett-Packard Company. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
f377b406 SC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 21 | |
c906108c | 22 | #include "defs.h" |
a198b876 SC |
23 | #include "target.h" |
24 | #include "event-loop.h" | |
e09d2eba | 25 | #include "event-top.h" |
a198b876 SC |
26 | #include "command.h" |
27 | #include "top.h" | |
d7b2e967 AC |
28 | #include "tui/tui.h" |
29 | #include "tui/tui-data.h" | |
30 | #include "tui/tui-io.h" | |
31 | #include "tui/tui-command.h" | |
32 | #include "tui/tui-win.h" | |
33 | #include "tui/tui-wingeneral.h" | |
34 | #include "tui/tui-file.h" | |
a198b876 SC |
35 | #include "ui-out.h" |
36 | #include "cli-out.h" | |
37 | #include <fcntl.h> | |
9d876a16 | 38 | #include <signal.h> |
614c279d | 39 | #include "filestuff.h" |
96ec9981 | 40 | |
6a83354a | 41 | #include "gdb_curses.h" |
a198b876 | 42 | |
4a1bcc8c MK |
43 | /* This redefines CTRL if it is not already defined, so it must come |
44 | after terminal state releated include files like <term.h> and | |
45 | "gdb_curses.h". */ | |
46 | #include "readline/readline.h" | |
47 | ||
bcdf1568 AC |
48 | int |
49 | key_is_start_sequence (int ch) | |
50 | { | |
51 | return (ch == 27); | |
52 | } | |
53 | ||
54 | int | |
55 | key_is_end_sequence (int ch) | |
56 | { | |
57 | return (ch == 126); | |
58 | } | |
59 | ||
60 | int | |
61 | key_is_backspace (int ch) | |
62 | { | |
63 | return (ch == 8); | |
64 | } | |
65 | ||
66 | int | |
67 | key_is_command_char (int ch) | |
68 | { | |
69 | return ((ch == KEY_NPAGE) || (ch == KEY_PPAGE) | |
70 | || (ch == KEY_LEFT) || (ch == KEY_RIGHT) | |
71 | || (ch == KEY_UP) || (ch == KEY_DOWN) | |
72 | || (ch == KEY_SF) || (ch == KEY_SR) | |
e5908723 MS |
73 | || (ch == (int)'\f') |
74 | || key_is_start_sequence (ch)); | |
bcdf1568 AC |
75 | } |
76 | ||
ec6f8892 SC |
77 | /* Use definition from readline 4.3. */ |
78 | #undef CTRL_CHAR | |
08ef48c5 MS |
79 | #define CTRL_CHAR(c) \ |
80 | ((c) < control_character_threshold && (((c) & 0x80) == 0)) | |
ec6f8892 | 81 | |
a198b876 SC |
82 | /* This file controls the IO interactions between gdb and curses. |
83 | When the TUI is enabled, gdb has two modes a curses and a standard | |
84 | mode. | |
85 | ||
1cc6d956 MS |
86 | In curses mode, the gdb outputs are made in a curses command |
87 | window. For this, the gdb_stdout and gdb_stderr are redirected to | |
88 | the specific ui_file implemented by TUI. The output is handled by | |
89 | tui_puts(). The input is also controlled by curses with | |
90 | tui_getc(). The readline library uses this function to get its | |
91 | input. Several readline hooks are installed to redirect readline | |
92 | output to the TUI (see also the note below). | |
a198b876 SC |
93 | |
94 | In normal mode, the gdb outputs are restored to their origin, that | |
95 | is as if TUI is not used. Readline also uses its original getc() | |
96 | function with stdin. | |
97 | ||
1cc6d956 MS |
98 | Note SCz/2001-07-21: the current readline is not clean in its |
99 | management of the output. Even if we install a redisplay handler, | |
100 | it sometimes writes on a stdout file. It is important to redirect | |
101 | every output produced by readline, otherwise the curses window will | |
102 | be garbled. This is implemented with a pipe that TUI reads and | |
103 | readline writes to. A gdb input handler is created so that reading | |
104 | the pipe is handled automatically. This will probably not work on | |
105 | non-Unix platforms. The best fix is to make readline clean enougth | |
106 | so that is never write on stdout. | |
107 | ||
108 | Note SCz/2002-09-01: we now use more readline hooks and it seems | |
109 | that with them we don't need the pipe anymore (verified by creating | |
110 | the pipe and closing its end so that write causes a SIGPIPE). The | |
111 | old pipe code is still there and can be conditionally removed by | |
8cee930b SC |
112 | #undef TUI_USE_PIPE_FOR_READLINE. */ |
113 | ||
114 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ | |
a156a290 | 115 | #ifdef HAVE_PIPE |
8cee930b | 116 | #define TUI_USE_PIPE_FOR_READLINE |
a156a290 | 117 | #endif |
1cc6d956 | 118 | /* #undef TUI_USE_PIPE_FOR_READLINE */ |
a198b876 SC |
119 | |
120 | /* TUI output files. */ | |
121 | static struct ui_file *tui_stdout; | |
122 | static struct ui_file *tui_stderr; | |
2b68e2c5 | 123 | struct ui_out *tui_out; |
a198b876 SC |
124 | |
125 | /* GDB output files in non-curses mode. */ | |
126 | static struct ui_file *tui_old_stdout; | |
127 | static struct ui_file *tui_old_stderr; | |
2b68e2c5 | 128 | struct ui_out *tui_old_uiout; |
a198b876 SC |
129 | |
130 | /* Readline previous hooks. */ | |
840ed64d JK |
131 | static rl_getc_func_t *tui_old_rl_getc_function; |
132 | static rl_voidfunc_t *tui_old_rl_redisplay_function; | |
133 | static rl_vintfunc_t *tui_old_rl_prep_terminal; | |
134 | static rl_voidfunc_t *tui_old_rl_deprep_terminal; | |
cc88a640 | 135 | static int tui_old_rl_echoing_p; |
a198b876 SC |
136 | |
137 | /* Readline output stream. | |
138 | Should be removed when readline is clean. */ | |
139 | static FILE *tui_rl_outstream; | |
140 | static FILE *tui_old_rl_outstream; | |
8cee930b | 141 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 142 | static int tui_readline_pipe[2]; |
8cee930b | 143 | #endif |
c906108c | 144 | |
57266a33 SC |
145 | /* The last gdb prompt that was registered in readline. |
146 | This may be the main gdb prompt or a secondary prompt. */ | |
147 | static char *tui_rl_saved_prompt; | |
148 | ||
6ba8e26f | 149 | static unsigned int tui_handle_resize_during_io (unsigned int); |
c906108c | 150 | |
8cee930b SC |
151 | static void |
152 | tui_putc (char c) | |
153 | { | |
154 | char buf[2]; | |
155 | ||
156 | buf[0] = c; | |
157 | buf[1] = 0; | |
158 | tui_puts (buf); | |
159 | } | |
c906108c | 160 | |
a198b876 | 161 | /* Print the string in the curses command window. */ |
c906108c | 162 | void |
a198b876 | 163 | tui_puts (const char *string) |
c906108c | 164 | { |
a198b876 SC |
165 | static int tui_skip_line = -1; |
166 | char c; | |
167 | WINDOW *w; | |
c906108c | 168 | |
6d012f14 | 169 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 170 | while ((c = *string++) != 0) |
c906108c | 171 | { |
a198b876 SC |
172 | /* Catch annotation and discard them. We need two \032 and |
173 | discard until a \n is seen. */ | |
174 | if (c == '\032') | |
175 | { | |
176 | tui_skip_line++; | |
177 | } | |
178 | else if (tui_skip_line != 1) | |
179 | { | |
180 | tui_skip_line = -1; | |
312809f8 EZ |
181 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ |
182 | if (c == '\t') | |
183 | { | |
184 | int line, col; | |
185 | ||
186 | getyx (w, line, col); | |
187 | do | |
188 | { | |
189 | waddch (w, ' '); | |
190 | col++; | |
191 | } while ((col % 8) != 0); | |
192 | } | |
193 | else | |
194 | waddch (w, c); | |
a198b876 SC |
195 | } |
196 | else if (c == '\n') | |
197 | tui_skip_line = -1; | |
198 | } | |
6d012f14 AC |
199 | getyx (w, TUI_CMD_WIN->detail.command_info.cur_line, |
200 | TUI_CMD_WIN->detail.command_info.curch); | |
9a2b4c1b MS |
201 | TUI_CMD_WIN->detail.command_info.start_line |
202 | = TUI_CMD_WIN->detail.command_info.cur_line; | |
a198b876 SC |
203 | |
204 | /* We could defer the following. */ | |
205 | wrefresh (w); | |
206 | fflush (stdout); | |
207 | } | |
208 | ||
209 | /* Readline callback. | |
210 | Redisplay the command line with its prompt after readline has | |
211 | changed the edited text. */ | |
e09d2eba | 212 | void |
a198b876 SC |
213 | tui_redisplay_readline (void) |
214 | { | |
215 | int prev_col; | |
216 | int height; | |
217 | int col, line; | |
218 | int c_pos; | |
219 | int c_line; | |
220 | int in; | |
221 | WINDOW *w; | |
222 | char *prompt; | |
223 | int start_line; | |
e3da6fc5 SC |
224 | |
225 | /* Detect when we temporarily left SingleKey and now the readline | |
1cc6d956 | 226 | edit buffer is empty, automatically restore the SingleKey |
9b8d6827 SC |
227 | mode. The restore must only be done if the command has finished. |
228 | The command could call prompt_for_continue and we must not | |
229 | restore SingleKey so that the prompt and normal keymap are used. */ | |
230 | if (tui_current_key_mode == TUI_ONE_COMMAND_MODE && rl_end == 0 | |
231 | && immediate_quit == 0) | |
6d012f14 | 232 | tui_set_key_mode (TUI_SINGLE_KEY_MODE); |
e3da6fc5 | 233 | |
6d012f14 | 234 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
e09d2eba SC |
235 | prompt = ""; |
236 | else | |
57266a33 | 237 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
238 | |
239 | c_pos = -1; | |
240 | c_line = -1; | |
6d012f14 AC |
241 | w = TUI_CMD_WIN->generic.handle; |
242 | start_line = TUI_CMD_WIN->detail.command_info.start_line; | |
a198b876 SC |
243 | wmove (w, start_line, 0); |
244 | prev_col = 0; | |
245 | height = 1; | |
246 | for (in = 0; prompt && prompt[in]; in++) | |
247 | { | |
248 | waddch (w, prompt[in]); | |
249 | getyx (w, line, col); | |
588dcc3e | 250 | if (col <= prev_col) |
a198b876 SC |
251 | height++; |
252 | prev_col = col; | |
253 | } | |
588dcc3e | 254 | for (in = 0; in <= rl_end; in++) |
a198b876 SC |
255 | { |
256 | unsigned char c; | |
257 | ||
a198b876 SC |
258 | if (in == rl_point) |
259 | { | |
260 | getyx (w, c_line, c_pos); | |
261 | } | |
262 | ||
588dcc3e PP |
263 | if (in == rl_end) |
264 | break; | |
265 | ||
266 | c = (unsigned char) rl_line_buffer[in]; | |
a198b876 SC |
267 | if (CTRL_CHAR (c) || c == RUBOUT) |
268 | { | |
269 | waddch (w, '^'); | |
270 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
271 | } | |
312809f8 EZ |
272 | else if (c == '\t') |
273 | { | |
274 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ | |
275 | getyx (w, line, col); | |
276 | do | |
277 | { | |
278 | waddch (w, ' '); | |
279 | col++; | |
280 | } while ((col % 8) != 0); | |
281 | } | |
c906108c SS |
282 | else |
283 | { | |
a198b876 | 284 | waddch (w, c); |
c906108c | 285 | } |
a198b876 SC |
286 | if (c == '\n') |
287 | { | |
6d012f14 AC |
288 | getyx (w, TUI_CMD_WIN->detail.command_info.start_line, |
289 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 SC |
290 | } |
291 | getyx (w, line, col); | |
292 | if (col < prev_col) | |
293 | height++; | |
294 | prev_col = col; | |
c906108c | 295 | } |
a198b876 | 296 | wclrtobot (w); |
6d012f14 AC |
297 | getyx (w, TUI_CMD_WIN->detail.command_info.start_line, |
298 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 | 299 | if (c_line >= 0) |
d75e970c SC |
300 | { |
301 | wmove (w, c_line, c_pos); | |
6d012f14 AC |
302 | TUI_CMD_WIN->detail.command_info.cur_line = c_line; |
303 | TUI_CMD_WIN->detail.command_info.curch = c_pos; | |
d75e970c | 304 | } |
6d012f14 | 305 | TUI_CMD_WIN->detail.command_info.start_line -= height - 1; |
a198b876 | 306 | |
a198b876 SC |
307 | wrefresh (w); |
308 | fflush(stdout); | |
309 | } | |
310 | ||
1cc6d956 MS |
311 | /* Readline callback to prepare the terminal. It is called once each |
312 | time we enter readline. Terminal is already setup in curses | |
313 | mode. */ | |
a198b876 | 314 | static void |
88fa91b4 | 315 | tui_prep_terminal (int notused1) |
c906108c | 316 | { |
57266a33 SC |
317 | /* Save the prompt registered in readline to correctly display it. |
318 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
319 | rl_prompt because it points to an alloca buffer). */ | |
320 | xfree (tui_rl_saved_prompt); | |
36d6eb95 | 321 | tui_rl_saved_prompt = rl_prompt != NULL ? xstrdup (rl_prompt) : NULL; |
a198b876 | 322 | } |
c906108c | 323 | |
1cc6d956 MS |
324 | /* Readline callback to restore the terminal. It is called once each |
325 | time we leave readline. There is nothing to do in curses mode. */ | |
a198b876 SC |
326 | static void |
327 | tui_deprep_terminal (void) | |
328 | { | |
329 | } | |
c906108c | 330 | |
8cee930b | 331 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
332 | /* Read readline output pipe and feed the command window with it. |
333 | Should be removed when readline is clean. */ | |
334 | static void | |
01f69b38 | 335 | tui_readline_output (int error, gdb_client_data data) |
a198b876 SC |
336 | { |
337 | int size; | |
338 | char buf[256]; | |
c906108c | 339 | |
a198b876 SC |
340 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
341 | if (size > 0 && tui_active) | |
c906108c | 342 | { |
a198b876 SC |
343 | buf[size] = 0; |
344 | tui_puts (buf); | |
c906108c | 345 | } |
a198b876 | 346 | } |
8cee930b SC |
347 | #endif |
348 | ||
349 | /* Return the portion of PATHNAME that should be output when listing | |
350 | possible completions. If we are hacking filename completion, we | |
351 | are only interested in the basename, the portion following the | |
352 | final slash. Otherwise, we return what we were passed. | |
353 | ||
1cc6d956 | 354 | Comes from readline/complete.c. */ |
9f37bbcc PA |
355 | static const char * |
356 | printable_part (const char *pathname) | |
8cee930b | 357 | { |
9f37bbcc | 358 | return rl_filename_completion_desired ? lbasename (pathname) : pathname; |
8cee930b SC |
359 | } |
360 | ||
1cc6d956 MS |
361 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and |
362 | we are using it, check for and output a single character for | |
363 | `special' filenames. Return the number of characters we | |
364 | output. */ | |
8cee930b SC |
365 | |
366 | #define PUTX(c) \ | |
367 | do { \ | |
368 | if (CTRL_CHAR (c)) \ | |
369 | { \ | |
370 | tui_puts ("^"); \ | |
371 | tui_putc (UNCTRL (c)); \ | |
372 | printed_len += 2; \ | |
373 | } \ | |
374 | else if (c == RUBOUT) \ | |
375 | { \ | |
376 | tui_puts ("^?"); \ | |
377 | printed_len += 2; \ | |
378 | } \ | |
379 | else \ | |
380 | { \ | |
381 | tui_putc (c); \ | |
382 | printed_len++; \ | |
383 | } \ | |
384 | } while (0) | |
385 | ||
386 | static int | |
9f37bbcc | 387 | print_filename (const char *to_print, const char *full_pathname) |
8cee930b SC |
388 | { |
389 | int printed_len = 0; | |
9f37bbcc | 390 | const char *s; |
8cee930b SC |
391 | |
392 | for (s = to_print; *s; s++) | |
393 | { | |
394 | PUTX (*s); | |
395 | } | |
396 | return printed_len; | |
397 | } | |
398 | ||
399 | /* The user must press "y" or "n". Non-zero return means "y" pressed. | |
1cc6d956 | 400 | Comes from readline/complete.c. */ |
8cee930b | 401 | static int |
d02c80cd | 402 | get_y_or_n (void) |
8cee930b SC |
403 | { |
404 | extern int _rl_abort_internal (); | |
405 | int c; | |
406 | ||
407 | for (;;) | |
408 | { | |
409 | c = rl_read_key (); | |
410 | if (c == 'y' || c == 'Y' || c == ' ') | |
411 | return (1); | |
412 | if (c == 'n' || c == 'N' || c == RUBOUT) | |
413 | return (0); | |
414 | if (c == ABORT_CHAR) | |
415 | _rl_abort_internal (); | |
416 | beep (); | |
417 | } | |
418 | } | |
419 | ||
420 | /* A convenience function for displaying a list of strings in | |
421 | columnar format on readline's output stream. MATCHES is the list | |
422 | of strings, in argv format, LEN is the number of strings in MATCHES, | |
423 | and MAX is the length of the longest string in MATCHES. | |
424 | ||
425 | Comes from readline/complete.c and modified to write in | |
426 | the TUI command window using tui_putc/tui_puts. */ | |
427 | static void | |
d02c80cd | 428 | tui_rl_display_match_list (char **matches, int len, int max) |
8cee930b SC |
429 | { |
430 | typedef int QSFUNC (const void *, const void *); | |
08ef48c5 MS |
431 | extern int _rl_qsort_string_compare (const void *, |
432 | const void *); | |
8cee930b SC |
433 | extern int _rl_print_completions_horizontally; |
434 | ||
435 | int count, limit, printed_len; | |
436 | int i, j, k, l; | |
9f37bbcc | 437 | const char *temp; |
8cee930b SC |
438 | |
439 | /* Screen dimension correspond to the TUI command window. */ | |
6d012f14 | 440 | int screenwidth = TUI_CMD_WIN->generic.width; |
8cee930b SC |
441 | |
442 | /* If there are many items, then ask the user if she really wants to | |
1cc6d956 | 443 | see them all. */ |
8cee930b SC |
444 | if (len >= rl_completion_query_items) |
445 | { | |
446 | char msg[256]; | |
447 | ||
8c042590 PM |
448 | xsnprintf (msg, sizeof (msg), |
449 | "\nDisplay all %d possibilities? (y or n)", len); | |
8cee930b SC |
450 | tui_puts (msg); |
451 | if (get_y_or_n () == 0) | |
452 | { | |
453 | tui_puts ("\n"); | |
454 | return; | |
455 | } | |
456 | } | |
457 | ||
1cc6d956 | 458 | /* How many items of MAX length can we fit in the screen window? */ |
8cee930b SC |
459 | max += 2; |
460 | limit = screenwidth / max; | |
461 | if (limit != 1 && (limit * max == screenwidth)) | |
462 | limit--; | |
463 | ||
1cc6d956 MS |
464 | /* Avoid a possible floating exception. If max > screenwidth, limit |
465 | will be 0 and a divide-by-zero fault will result. */ | |
8cee930b SC |
466 | if (limit == 0) |
467 | limit = 1; | |
468 | ||
1cc6d956 | 469 | /* How many iterations of the printing loop? */ |
8cee930b SC |
470 | count = (len + (limit - 1)) / limit; |
471 | ||
472 | /* Watch out for special case. If LEN is less than LIMIT, then | |
473 | just do the inner printing loop. | |
1cc6d956 | 474 | 0 < len <= limit implies count = 1. */ |
8cee930b | 475 | |
1cc6d956 | 476 | /* Sort the items if they are not already sorted. */ |
8cee930b SC |
477 | if (rl_ignore_completion_duplicates == 0) |
478 | qsort (matches + 1, len, sizeof (char *), | |
479 | (QSFUNC *)_rl_qsort_string_compare); | |
480 | ||
481 | tui_putc ('\n'); | |
482 | ||
483 | if (_rl_print_completions_horizontally == 0) | |
484 | { | |
1cc6d956 | 485 | /* Print the sorted items, up-and-down alphabetically, like ls. */ |
8cee930b SC |
486 | for (i = 1; i <= count; i++) |
487 | { | |
488 | for (j = 0, l = i; j < limit; j++) | |
489 | { | |
490 | if (l > len || matches[l] == 0) | |
491 | break; | |
492 | else | |
493 | { | |
494 | temp = printable_part (matches[l]); | |
495 | printed_len = print_filename (temp, matches[l]); | |
496 | ||
497 | if (j + 1 < limit) | |
498 | for (k = 0; k < max - printed_len; k++) | |
499 | tui_putc (' '); | |
500 | } | |
501 | l += count; | |
502 | } | |
503 | tui_putc ('\n'); | |
504 | } | |
505 | } | |
506 | else | |
507 | { | |
1cc6d956 | 508 | /* Print the sorted items, across alphabetically, like ls -x. */ |
8cee930b SC |
509 | for (i = 1; matches[i]; i++) |
510 | { | |
511 | temp = printable_part (matches[i]); | |
512 | printed_len = print_filename (temp, matches[i]); | |
1cc6d956 | 513 | /* Have we reached the end of this line? */ |
8cee930b SC |
514 | if (matches[i+1]) |
515 | { | |
516 | if (i && (limit > 1) && (i % limit) == 0) | |
517 | tui_putc ('\n'); | |
518 | else | |
519 | for (k = 0; k < max - printed_len; k++) | |
520 | tui_putc (' '); | |
521 | } | |
522 | } | |
523 | tui_putc ('\n'); | |
524 | } | |
525 | } | |
a198b876 SC |
526 | |
527 | /* Setup the IO for curses or non-curses mode. | |
528 | - In non-curses mode, readline and gdb use the standard input and | |
529 | standard output/error directly. | |
530 | - In curses mode, the standard output/error is controlled by TUI | |
531 | with the tui_stdout and tui_stderr. The output is redirected in | |
532 | the curses command window. Several readline callbacks are installed | |
533 | so that readline asks for its input to the curses command window | |
534 | with wgetch(). */ | |
535 | void | |
536 | tui_setup_io (int mode) | |
537 | { | |
cc88a640 JK |
538 | extern int _rl_echoing_p; |
539 | ||
a198b876 | 540 | if (mode) |
c906108c | 541 | { |
a198b876 SC |
542 | /* Redirect readline to TUI. */ |
543 | tui_old_rl_redisplay_function = rl_redisplay_function; | |
544 | tui_old_rl_deprep_terminal = rl_deprep_term_function; | |
545 | tui_old_rl_prep_terminal = rl_prep_term_function; | |
546 | tui_old_rl_getc_function = rl_getc_function; | |
547 | tui_old_rl_outstream = rl_outstream; | |
cc88a640 | 548 | tui_old_rl_echoing_p = _rl_echoing_p; |
a198b876 SC |
549 | rl_redisplay_function = tui_redisplay_readline; |
550 | rl_deprep_term_function = tui_deprep_terminal; | |
551 | rl_prep_term_function = tui_prep_terminal; | |
552 | rl_getc_function = tui_getc; | |
cc88a640 | 553 | _rl_echoing_p = 0; |
a198b876 SC |
554 | rl_outstream = tui_rl_outstream; |
555 | rl_prompt = 0; | |
8cee930b SC |
556 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
557 | rl_already_prompted = 0; | |
a198b876 SC |
558 | |
559 | /* Keep track of previous gdb output. */ | |
560 | tui_old_stdout = gdb_stdout; | |
561 | tui_old_stderr = gdb_stderr; | |
79a45e25 | 562 | tui_old_uiout = current_uiout; |
a198b876 SC |
563 | |
564 | /* Reconfigure gdb output. */ | |
565 | gdb_stdout = tui_stdout; | |
566 | gdb_stderr = tui_stderr; | |
567 | gdb_stdlog = gdb_stdout; /* for moment */ | |
568 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 569 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 570 | current_uiout = tui_out; |
9d876a16 SC |
571 | |
572 | /* Save tty for SIGCONT. */ | |
573 | savetty (); | |
c906108c | 574 | } |
a198b876 | 575 | else |
c906108c | 576 | { |
a198b876 SC |
577 | /* Restore gdb output. */ |
578 | gdb_stdout = tui_old_stdout; | |
579 | gdb_stderr = tui_old_stderr; | |
580 | gdb_stdlog = gdb_stdout; /* for moment */ | |
581 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 582 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 583 | current_uiout = tui_old_uiout; |
a198b876 SC |
584 | |
585 | /* Restore readline. */ | |
586 | rl_redisplay_function = tui_old_rl_redisplay_function; | |
587 | rl_deprep_term_function = tui_old_rl_deprep_terminal; | |
588 | rl_prep_term_function = tui_old_rl_prep_terminal; | |
589 | rl_getc_function = tui_old_rl_getc_function; | |
590 | rl_outstream = tui_old_rl_outstream; | |
8cee930b | 591 | rl_completion_display_matches_hook = 0; |
cc88a640 | 592 | _rl_echoing_p = tui_old_rl_echoing_p; |
bd9b0abf | 593 | rl_already_prompted = 0; |
9d876a16 SC |
594 | |
595 | /* Save tty for SIGCONT. */ | |
596 | savetty (); | |
597 | } | |
598 | } | |
599 | ||
600 | #ifdef SIGCONT | |
601 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ | |
602 | static void | |
603 | tui_cont_sig (int sig) | |
604 | { | |
605 | if (tui_active) | |
606 | { | |
607 | /* Restore the terminal setting because another process (shell) | |
608 | might have changed it. */ | |
609 | resetty (); | |
610 | ||
611 | /* Force a refresh of the screen. */ | |
a21fcd8f | 612 | tui_refresh_all_win (); |
d75e970c SC |
613 | |
614 | /* Update cursor position on the screen. */ | |
6d012f14 AC |
615 | wmove (TUI_CMD_WIN->generic.handle, |
616 | TUI_CMD_WIN->detail.command_info.start_line, | |
617 | TUI_CMD_WIN->detail.command_info.curch); | |
618 | wrefresh (TUI_CMD_WIN->generic.handle); | |
c906108c | 619 | } |
9d876a16 | 620 | signal (sig, tui_cont_sig); |
a198b876 | 621 | } |
9d876a16 | 622 | #endif |
c906108c | 623 | |
a198b876 SC |
624 | /* Initialize the IO for gdb in curses mode. */ |
625 | void | |
d02c80cd | 626 | tui_initialize_io (void) |
a198b876 | 627 | { |
9d876a16 SC |
628 | #ifdef SIGCONT |
629 | signal (SIGCONT, tui_cont_sig); | |
630 | #endif | |
631 | ||
a198b876 SC |
632 | /* Create tui output streams. */ |
633 | tui_stdout = tui_fileopen (stdout); | |
634 | tui_stderr = tui_fileopen (stderr); | |
635 | tui_out = tui_out_new (tui_stdout); | |
636 | ||
43df09d9 | 637 | /* Create the default UI. */ |
4801a9a3 | 638 | tui_old_uiout = cli_out_new (gdb_stdout); |
a198b876 | 639 | |
8cee930b | 640 | #ifdef TUI_USE_PIPE_FOR_READLINE |
1cc6d956 MS |
641 | /* Temporary solution for readline writing to stdout: redirect |
642 | readline output in a pipe, read that pipe and output the content | |
643 | in the curses command window. */ | |
614c279d | 644 | if (gdb_pipe_cloexec (tui_readline_pipe) != 0) |
e0e6bcab GB |
645 | error (_("Cannot create pipe for readline")); |
646 | ||
a198b876 SC |
647 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
648 | if (tui_rl_outstream == 0) | |
e0e6bcab GB |
649 | error (_("Cannot redirect readline output")); |
650 | ||
0f59c96f | 651 | setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0); |
c906108c | 652 | |
a198b876 SC |
653 | #ifdef O_NONBLOCK |
654 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 655 | #else |
a198b876 SC |
656 | #ifdef O_NDELAY |
657 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 658 | #endif |
a198b876 | 659 | #endif |
a198b876 | 660 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
661 | #else |
662 | tui_rl_outstream = stdout; | |
663 | #endif | |
a198b876 SC |
664 | } |
665 | ||
1cc6d956 MS |
666 | /* Get a character from the command window. This is called from the |
667 | readline package. */ | |
a198b876 SC |
668 | int |
669 | tui_getc (FILE *fp) | |
670 | { | |
671 | int ch; | |
672 | WINDOW *w; | |
673 | ||
6d012f14 | 674 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 675 | |
8cee930b | 676 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 677 | /* Flush readline output. */ |
01f69b38 | 678 | tui_readline_output (0, 0); |
8cee930b SC |
679 | #endif |
680 | ||
a198b876 | 681 | ch = wgetch (w); |
6ba8e26f | 682 | ch = tui_handle_resize_during_io (ch); |
c906108c | 683 | |
1cc6d956 MS |
684 | /* The \n must be echoed because it will not be printed by |
685 | readline. */ | |
a198b876 SC |
686 | if (ch == '\n') |
687 | { | |
688 | /* When hitting return with an empty input, gdb executes the last | |
689 | command. If we emit a newline, this fills up the command window | |
690 | with empty lines with gdb prompt at beginning. Instead of that, | |
691 | stay on the same line but provide a visual effect to show the | |
692 | user we recognized the command. */ | |
693 | if (rl_end == 0) | |
694 | { | |
6d012f14 | 695 | wmove (w, TUI_CMD_WIN->detail.command_info.cur_line, 0); |
a198b876 SC |
696 | |
697 | /* Clear the line. This will blink the gdb prompt since | |
698 | it will be redrawn at the same line. */ | |
699 | wclrtoeol (w); | |
700 | wrefresh (w); | |
701 | napms (20); | |
702 | } | |
703 | else | |
704 | { | |
6d012f14 AC |
705 | wmove (w, TUI_CMD_WIN->detail.command_info.cur_line, |
706 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 SC |
707 | waddch (w, ch); |
708 | } | |
709 | } | |
710 | ||
bcdf1568 | 711 | if (key_is_command_char (ch)) |
1cc6d956 | 712 | { /* Handle prev/next/up/down here. */ |
b0a30fce | 713 | ch = tui_dispatch_ctrl_char (ch); |
c906108c | 714 | } |
a198b876 | 715 | |
c906108c | 716 | if (ch == '\n' || ch == '\r' || ch == '\f') |
6d012f14 | 717 | TUI_CMD_WIN->detail.command_info.curch = 0; |
a198b876 SC |
718 | if (ch == KEY_BACKSPACE) |
719 | return '\b'; | |
d64e57fa PP |
720 | |
721 | if (async_command_editing_p && key_is_start_sequence (ch)) | |
722 | { | |
723 | int ch_pending; | |
724 | ||
725 | nodelay (w, TRUE); | |
726 | ch_pending = wgetch (w); | |
727 | nodelay (w, FALSE); | |
728 | ||
729 | /* If we have pending input following a start sequence, call the stdin | |
730 | event handler again because ncurses may have already read and stored | |
731 | the input into its internal buffer, meaning that we won't get an stdin | |
732 | event for it. If we don't compensate for this missed stdin event, key | |
733 | sequences as Alt_F (^[f) will not behave promptly. | |
734 | ||
735 | (We only compensates for the missed 2nd byte of a key sequence because | |
736 | 2-byte sequences are by far the most commonly used. ncurses may have | |
737 | buffered a larger, 3+-byte key sequence though it remains to be seen | |
738 | whether it is useful to compensate for all the bytes of such | |
739 | sequences.) */ | |
740 | if (ch_pending != ERR) | |
741 | { | |
742 | ungetch (ch_pending); | |
743 | call_stdin_event_handler_again_p = 1; | |
744 | } | |
745 | } | |
746 | ||
c906108c | 747 | return ch; |
a198b876 | 748 | } |
c906108c | 749 | |
312809f8 EZ |
750 | /* Utility function to expand TABs in a STRING into spaces. STRING |
751 | will be displayed starting at column COL, and is assumed to include | |
752 | no newlines. The returned expanded string is malloc'ed. */ | |
753 | ||
754 | char * | |
755 | tui_expand_tabs (const char *string, int col) | |
756 | { | |
757 | int n_adjust; | |
758 | const char *s; | |
759 | char *ret, *q; | |
760 | ||
761 | /* 1. How many additional characters do we need? */ | |
762 | for (n_adjust = 0, s = string; s; ) | |
763 | { | |
764 | s = strpbrk (s, "\t"); | |
765 | if (s) | |
766 | { | |
767 | col += (s - string) + n_adjust; | |
768 | /* Adjustment for the next tab stop, minus one for the TAB | |
769 | we replace with spaces. */ | |
770 | n_adjust += 8 - (col % 8) - 1; | |
771 | s++; | |
772 | } | |
773 | } | |
774 | ||
775 | /* Allocate the copy. */ | |
776 | ret = q = xmalloc (strlen (string) + n_adjust + 1); | |
777 | ||
778 | /* 2. Copy the original string while replacing TABs with spaces. */ | |
779 | for (s = string; s; ) | |
780 | { | |
781 | char *s1 = strpbrk (s, "\t"); | |
782 | if (s1) | |
783 | { | |
784 | if (s1 > s) | |
785 | { | |
786 | strncpy (q, s, s1 - s); | |
787 | q += s1 - s; | |
788 | col += s1 - s; | |
789 | } | |
790 | do { | |
791 | *q++ = ' '; | |
792 | col++; | |
793 | } while ((col % 8) != 0); | |
794 | s1++; | |
795 | } | |
796 | else | |
797 | strcpy (q, s); | |
798 | s = s1; | |
799 | } | |
800 | ||
801 | return ret; | |
802 | } | |
c906108c | 803 | |
a198b876 SC |
804 | /* Cleanup when a resize has occured. |
805 | Returns the character that must be processed. */ | |
c906108c | 806 | static unsigned int |
6ba8e26f | 807 | tui_handle_resize_during_io (unsigned int original_ch) |
c906108c | 808 | { |
dd1abb8c | 809 | if (tui_win_resized ()) |
c906108c | 810 | { |
36900355 | 811 | tui_resize_all (); |
a21fcd8f | 812 | tui_refresh_all_win (); |
c906108c | 813 | dont_repeat (); |
dd1abb8c | 814 | tui_set_win_resized_to (FALSE); |
c906108c SS |
815 | return '\n'; |
816 | } | |
817 | else | |
6ba8e26f | 818 | return original_ch; |
a198b876 | 819 | } |