Commit | Line | Data |
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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; | |
181 | waddch (w, c); | |
182 | } | |
183 | else if (c == '\n') | |
184 | tui_skip_line = -1; | |
185 | } | |
6d012f14 AC |
186 | getyx (w, TUI_CMD_WIN->detail.command_info.cur_line, |
187 | TUI_CMD_WIN->detail.command_info.curch); | |
9a2b4c1b MS |
188 | TUI_CMD_WIN->detail.command_info.start_line |
189 | = TUI_CMD_WIN->detail.command_info.cur_line; | |
a198b876 SC |
190 | |
191 | /* We could defer the following. */ | |
192 | wrefresh (w); | |
193 | fflush (stdout); | |
194 | } | |
195 | ||
196 | /* Readline callback. | |
197 | Redisplay the command line with its prompt after readline has | |
198 | changed the edited text. */ | |
e09d2eba | 199 | void |
a198b876 SC |
200 | tui_redisplay_readline (void) |
201 | { | |
202 | int prev_col; | |
203 | int height; | |
204 | int col, line; | |
205 | int c_pos; | |
206 | int c_line; | |
207 | int in; | |
208 | WINDOW *w; | |
209 | char *prompt; | |
210 | int start_line; | |
e3da6fc5 SC |
211 | |
212 | /* Detect when we temporarily left SingleKey and now the readline | |
1cc6d956 | 213 | edit buffer is empty, automatically restore the SingleKey |
9b8d6827 SC |
214 | mode. The restore must only be done if the command has finished. |
215 | The command could call prompt_for_continue and we must not | |
216 | restore SingleKey so that the prompt and normal keymap are used. */ | |
217 | if (tui_current_key_mode == TUI_ONE_COMMAND_MODE && rl_end == 0 | |
218 | && immediate_quit == 0) | |
6d012f14 | 219 | tui_set_key_mode (TUI_SINGLE_KEY_MODE); |
e3da6fc5 | 220 | |
6d012f14 | 221 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
e09d2eba SC |
222 | prompt = ""; |
223 | else | |
57266a33 | 224 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
225 | |
226 | c_pos = -1; | |
227 | c_line = -1; | |
6d012f14 AC |
228 | w = TUI_CMD_WIN->generic.handle; |
229 | start_line = TUI_CMD_WIN->detail.command_info.start_line; | |
a198b876 SC |
230 | wmove (w, start_line, 0); |
231 | prev_col = 0; | |
232 | height = 1; | |
233 | for (in = 0; prompt && prompt[in]; in++) | |
234 | { | |
235 | waddch (w, prompt[in]); | |
236 | getyx (w, line, col); | |
588dcc3e | 237 | if (col <= prev_col) |
a198b876 SC |
238 | height++; |
239 | prev_col = col; | |
240 | } | |
588dcc3e | 241 | for (in = 0; in <= rl_end; in++) |
a198b876 SC |
242 | { |
243 | unsigned char c; | |
244 | ||
a198b876 SC |
245 | if (in == rl_point) |
246 | { | |
247 | getyx (w, c_line, c_pos); | |
248 | } | |
249 | ||
588dcc3e PP |
250 | if (in == rl_end) |
251 | break; | |
252 | ||
253 | c = (unsigned char) rl_line_buffer[in]; | |
a198b876 SC |
254 | if (CTRL_CHAR (c) || c == RUBOUT) |
255 | { | |
256 | waddch (w, '^'); | |
257 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
258 | } | |
c906108c SS |
259 | else |
260 | { | |
a198b876 | 261 | waddch (w, c); |
c906108c | 262 | } |
a198b876 SC |
263 | if (c == '\n') |
264 | { | |
6d012f14 AC |
265 | getyx (w, TUI_CMD_WIN->detail.command_info.start_line, |
266 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 SC |
267 | } |
268 | getyx (w, line, col); | |
269 | if (col < prev_col) | |
270 | height++; | |
271 | prev_col = col; | |
c906108c | 272 | } |
a198b876 | 273 | wclrtobot (w); |
6d012f14 AC |
274 | getyx (w, TUI_CMD_WIN->detail.command_info.start_line, |
275 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 | 276 | if (c_line >= 0) |
d75e970c SC |
277 | { |
278 | wmove (w, c_line, c_pos); | |
6d012f14 AC |
279 | TUI_CMD_WIN->detail.command_info.cur_line = c_line; |
280 | TUI_CMD_WIN->detail.command_info.curch = c_pos; | |
d75e970c | 281 | } |
6d012f14 | 282 | TUI_CMD_WIN->detail.command_info.start_line -= height - 1; |
a198b876 | 283 | |
a198b876 SC |
284 | wrefresh (w); |
285 | fflush(stdout); | |
286 | } | |
287 | ||
1cc6d956 MS |
288 | /* Readline callback to prepare the terminal. It is called once each |
289 | time we enter readline. Terminal is already setup in curses | |
290 | mode. */ | |
a198b876 | 291 | static void |
88fa91b4 | 292 | tui_prep_terminal (int notused1) |
c906108c | 293 | { |
57266a33 SC |
294 | /* Save the prompt registered in readline to correctly display it. |
295 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
296 | rl_prompt because it points to an alloca buffer). */ | |
297 | xfree (tui_rl_saved_prompt); | |
36d6eb95 | 298 | tui_rl_saved_prompt = rl_prompt != NULL ? xstrdup (rl_prompt) : NULL; |
a198b876 | 299 | } |
c906108c | 300 | |
1cc6d956 MS |
301 | /* Readline callback to restore the terminal. It is called once each |
302 | time we leave readline. There is nothing to do in curses mode. */ | |
a198b876 SC |
303 | static void |
304 | tui_deprep_terminal (void) | |
305 | { | |
306 | } | |
c906108c | 307 | |
8cee930b | 308 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
309 | /* Read readline output pipe and feed the command window with it. |
310 | Should be removed when readline is clean. */ | |
311 | static void | |
01f69b38 | 312 | tui_readline_output (int error, gdb_client_data data) |
a198b876 SC |
313 | { |
314 | int size; | |
315 | char buf[256]; | |
c906108c | 316 | |
a198b876 SC |
317 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
318 | if (size > 0 && tui_active) | |
c906108c | 319 | { |
a198b876 SC |
320 | buf[size] = 0; |
321 | tui_puts (buf); | |
c906108c | 322 | } |
a198b876 | 323 | } |
8cee930b SC |
324 | #endif |
325 | ||
326 | /* Return the portion of PATHNAME that should be output when listing | |
327 | possible completions. If we are hacking filename completion, we | |
328 | are only interested in the basename, the portion following the | |
329 | final slash. Otherwise, we return what we were passed. | |
330 | ||
1cc6d956 | 331 | Comes from readline/complete.c. */ |
9f37bbcc PA |
332 | static const char * |
333 | printable_part (const char *pathname) | |
8cee930b | 334 | { |
9f37bbcc | 335 | return rl_filename_completion_desired ? lbasename (pathname) : pathname; |
8cee930b SC |
336 | } |
337 | ||
1cc6d956 MS |
338 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and |
339 | we are using it, check for and output a single character for | |
340 | `special' filenames. Return the number of characters we | |
341 | output. */ | |
8cee930b SC |
342 | |
343 | #define PUTX(c) \ | |
344 | do { \ | |
345 | if (CTRL_CHAR (c)) \ | |
346 | { \ | |
347 | tui_puts ("^"); \ | |
348 | tui_putc (UNCTRL (c)); \ | |
349 | printed_len += 2; \ | |
350 | } \ | |
351 | else if (c == RUBOUT) \ | |
352 | { \ | |
353 | tui_puts ("^?"); \ | |
354 | printed_len += 2; \ | |
355 | } \ | |
356 | else \ | |
357 | { \ | |
358 | tui_putc (c); \ | |
359 | printed_len++; \ | |
360 | } \ | |
361 | } while (0) | |
362 | ||
363 | static int | |
9f37bbcc | 364 | print_filename (const char *to_print, const char *full_pathname) |
8cee930b SC |
365 | { |
366 | int printed_len = 0; | |
9f37bbcc | 367 | const char *s; |
8cee930b SC |
368 | |
369 | for (s = to_print; *s; s++) | |
370 | { | |
371 | PUTX (*s); | |
372 | } | |
373 | return printed_len; | |
374 | } | |
375 | ||
376 | /* The user must press "y" or "n". Non-zero return means "y" pressed. | |
1cc6d956 | 377 | Comes from readline/complete.c. */ |
8cee930b | 378 | static int |
d02c80cd | 379 | get_y_or_n (void) |
8cee930b SC |
380 | { |
381 | extern int _rl_abort_internal (); | |
382 | int c; | |
383 | ||
384 | for (;;) | |
385 | { | |
386 | c = rl_read_key (); | |
387 | if (c == 'y' || c == 'Y' || c == ' ') | |
388 | return (1); | |
389 | if (c == 'n' || c == 'N' || c == RUBOUT) | |
390 | return (0); | |
391 | if (c == ABORT_CHAR) | |
392 | _rl_abort_internal (); | |
393 | beep (); | |
394 | } | |
395 | } | |
396 | ||
397 | /* A convenience function for displaying a list of strings in | |
398 | columnar format on readline's output stream. MATCHES is the list | |
399 | of strings, in argv format, LEN is the number of strings in MATCHES, | |
400 | and MAX is the length of the longest string in MATCHES. | |
401 | ||
402 | Comes from readline/complete.c and modified to write in | |
403 | the TUI command window using tui_putc/tui_puts. */ | |
404 | static void | |
d02c80cd | 405 | tui_rl_display_match_list (char **matches, int len, int max) |
8cee930b SC |
406 | { |
407 | typedef int QSFUNC (const void *, const void *); | |
08ef48c5 MS |
408 | extern int _rl_qsort_string_compare (const void *, |
409 | const void *); | |
8cee930b SC |
410 | extern int _rl_print_completions_horizontally; |
411 | ||
412 | int count, limit, printed_len; | |
413 | int i, j, k, l; | |
9f37bbcc | 414 | const char *temp; |
8cee930b SC |
415 | |
416 | /* Screen dimension correspond to the TUI command window. */ | |
6d012f14 | 417 | int screenwidth = TUI_CMD_WIN->generic.width; |
8cee930b SC |
418 | |
419 | /* If there are many items, then ask the user if she really wants to | |
1cc6d956 | 420 | see them all. */ |
8cee930b SC |
421 | if (len >= rl_completion_query_items) |
422 | { | |
423 | char msg[256]; | |
424 | ||
8c042590 PM |
425 | xsnprintf (msg, sizeof (msg), |
426 | "\nDisplay all %d possibilities? (y or n)", len); | |
8cee930b SC |
427 | tui_puts (msg); |
428 | if (get_y_or_n () == 0) | |
429 | { | |
430 | tui_puts ("\n"); | |
431 | return; | |
432 | } | |
433 | } | |
434 | ||
1cc6d956 | 435 | /* How many items of MAX length can we fit in the screen window? */ |
8cee930b SC |
436 | max += 2; |
437 | limit = screenwidth / max; | |
438 | if (limit != 1 && (limit * max == screenwidth)) | |
439 | limit--; | |
440 | ||
1cc6d956 MS |
441 | /* Avoid a possible floating exception. If max > screenwidth, limit |
442 | will be 0 and a divide-by-zero fault will result. */ | |
8cee930b SC |
443 | if (limit == 0) |
444 | limit = 1; | |
445 | ||
1cc6d956 | 446 | /* How many iterations of the printing loop? */ |
8cee930b SC |
447 | count = (len + (limit - 1)) / limit; |
448 | ||
449 | /* Watch out for special case. If LEN is less than LIMIT, then | |
450 | just do the inner printing loop. | |
1cc6d956 | 451 | 0 < len <= limit implies count = 1. */ |
8cee930b | 452 | |
1cc6d956 | 453 | /* Sort the items if they are not already sorted. */ |
8cee930b SC |
454 | if (rl_ignore_completion_duplicates == 0) |
455 | qsort (matches + 1, len, sizeof (char *), | |
456 | (QSFUNC *)_rl_qsort_string_compare); | |
457 | ||
458 | tui_putc ('\n'); | |
459 | ||
460 | if (_rl_print_completions_horizontally == 0) | |
461 | { | |
1cc6d956 | 462 | /* Print the sorted items, up-and-down alphabetically, like ls. */ |
8cee930b SC |
463 | for (i = 1; i <= count; i++) |
464 | { | |
465 | for (j = 0, l = i; j < limit; j++) | |
466 | { | |
467 | if (l > len || matches[l] == 0) | |
468 | break; | |
469 | else | |
470 | { | |
471 | temp = printable_part (matches[l]); | |
472 | printed_len = print_filename (temp, matches[l]); | |
473 | ||
474 | if (j + 1 < limit) | |
475 | for (k = 0; k < max - printed_len; k++) | |
476 | tui_putc (' '); | |
477 | } | |
478 | l += count; | |
479 | } | |
480 | tui_putc ('\n'); | |
481 | } | |
482 | } | |
483 | else | |
484 | { | |
1cc6d956 | 485 | /* Print the sorted items, across alphabetically, like ls -x. */ |
8cee930b SC |
486 | for (i = 1; matches[i]; i++) |
487 | { | |
488 | temp = printable_part (matches[i]); | |
489 | printed_len = print_filename (temp, matches[i]); | |
1cc6d956 | 490 | /* Have we reached the end of this line? */ |
8cee930b SC |
491 | if (matches[i+1]) |
492 | { | |
493 | if (i && (limit > 1) && (i % limit) == 0) | |
494 | tui_putc ('\n'); | |
495 | else | |
496 | for (k = 0; k < max - printed_len; k++) | |
497 | tui_putc (' '); | |
498 | } | |
499 | } | |
500 | tui_putc ('\n'); | |
501 | } | |
502 | } | |
a198b876 SC |
503 | |
504 | /* Setup the IO for curses or non-curses mode. | |
505 | - In non-curses mode, readline and gdb use the standard input and | |
506 | standard output/error directly. | |
507 | - In curses mode, the standard output/error is controlled by TUI | |
508 | with the tui_stdout and tui_stderr. The output is redirected in | |
509 | the curses command window. Several readline callbacks are installed | |
510 | so that readline asks for its input to the curses command window | |
511 | with wgetch(). */ | |
512 | void | |
513 | tui_setup_io (int mode) | |
514 | { | |
cc88a640 JK |
515 | extern int _rl_echoing_p; |
516 | ||
a198b876 | 517 | if (mode) |
c906108c | 518 | { |
a198b876 SC |
519 | /* Redirect readline to TUI. */ |
520 | tui_old_rl_redisplay_function = rl_redisplay_function; | |
521 | tui_old_rl_deprep_terminal = rl_deprep_term_function; | |
522 | tui_old_rl_prep_terminal = rl_prep_term_function; | |
523 | tui_old_rl_getc_function = rl_getc_function; | |
524 | tui_old_rl_outstream = rl_outstream; | |
cc88a640 | 525 | tui_old_rl_echoing_p = _rl_echoing_p; |
a198b876 SC |
526 | rl_redisplay_function = tui_redisplay_readline; |
527 | rl_deprep_term_function = tui_deprep_terminal; | |
528 | rl_prep_term_function = tui_prep_terminal; | |
529 | rl_getc_function = tui_getc; | |
cc88a640 | 530 | _rl_echoing_p = 0; |
a198b876 SC |
531 | rl_outstream = tui_rl_outstream; |
532 | rl_prompt = 0; | |
8cee930b SC |
533 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
534 | rl_already_prompted = 0; | |
a198b876 SC |
535 | |
536 | /* Keep track of previous gdb output. */ | |
537 | tui_old_stdout = gdb_stdout; | |
538 | tui_old_stderr = gdb_stderr; | |
79a45e25 | 539 | tui_old_uiout = current_uiout; |
a198b876 SC |
540 | |
541 | /* Reconfigure gdb output. */ | |
542 | gdb_stdout = tui_stdout; | |
543 | gdb_stderr = tui_stderr; | |
544 | gdb_stdlog = gdb_stdout; /* for moment */ | |
545 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 546 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 547 | current_uiout = tui_out; |
9d876a16 SC |
548 | |
549 | /* Save tty for SIGCONT. */ | |
550 | savetty (); | |
c906108c | 551 | } |
a198b876 | 552 | else |
c906108c | 553 | { |
a198b876 SC |
554 | /* Restore gdb output. */ |
555 | gdb_stdout = tui_old_stdout; | |
556 | gdb_stderr = tui_old_stderr; | |
557 | gdb_stdlog = gdb_stdout; /* for moment */ | |
558 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 559 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 560 | current_uiout = tui_old_uiout; |
a198b876 SC |
561 | |
562 | /* Restore readline. */ | |
563 | rl_redisplay_function = tui_old_rl_redisplay_function; | |
564 | rl_deprep_term_function = tui_old_rl_deprep_terminal; | |
565 | rl_prep_term_function = tui_old_rl_prep_terminal; | |
566 | rl_getc_function = tui_old_rl_getc_function; | |
567 | rl_outstream = tui_old_rl_outstream; | |
8cee930b | 568 | rl_completion_display_matches_hook = 0; |
cc88a640 | 569 | _rl_echoing_p = tui_old_rl_echoing_p; |
bd9b0abf | 570 | rl_already_prompted = 0; |
9d876a16 SC |
571 | |
572 | /* Save tty for SIGCONT. */ | |
573 | savetty (); | |
574 | } | |
575 | } | |
576 | ||
577 | #ifdef SIGCONT | |
578 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ | |
579 | static void | |
580 | tui_cont_sig (int sig) | |
581 | { | |
582 | if (tui_active) | |
583 | { | |
584 | /* Restore the terminal setting because another process (shell) | |
585 | might have changed it. */ | |
586 | resetty (); | |
587 | ||
588 | /* Force a refresh of the screen. */ | |
a21fcd8f | 589 | tui_refresh_all_win (); |
d75e970c SC |
590 | |
591 | /* Update cursor position on the screen. */ | |
6d012f14 AC |
592 | wmove (TUI_CMD_WIN->generic.handle, |
593 | TUI_CMD_WIN->detail.command_info.start_line, | |
594 | TUI_CMD_WIN->detail.command_info.curch); | |
595 | wrefresh (TUI_CMD_WIN->generic.handle); | |
c906108c | 596 | } |
9d876a16 | 597 | signal (sig, tui_cont_sig); |
a198b876 | 598 | } |
9d876a16 | 599 | #endif |
c906108c | 600 | |
a198b876 SC |
601 | /* Initialize the IO for gdb in curses mode. */ |
602 | void | |
d02c80cd | 603 | tui_initialize_io (void) |
a198b876 | 604 | { |
9d876a16 SC |
605 | #ifdef SIGCONT |
606 | signal (SIGCONT, tui_cont_sig); | |
607 | #endif | |
608 | ||
a198b876 SC |
609 | /* Create tui output streams. */ |
610 | tui_stdout = tui_fileopen (stdout); | |
611 | tui_stderr = tui_fileopen (stderr); | |
612 | tui_out = tui_out_new (tui_stdout); | |
613 | ||
43df09d9 | 614 | /* Create the default UI. */ |
4801a9a3 | 615 | tui_old_uiout = cli_out_new (gdb_stdout); |
a198b876 | 616 | |
8cee930b | 617 | #ifdef TUI_USE_PIPE_FOR_READLINE |
1cc6d956 MS |
618 | /* Temporary solution for readline writing to stdout: redirect |
619 | readline output in a pipe, read that pipe and output the content | |
620 | in the curses command window. */ | |
614c279d | 621 | if (gdb_pipe_cloexec (tui_readline_pipe) != 0) |
e0e6bcab GB |
622 | error (_("Cannot create pipe for readline")); |
623 | ||
a198b876 SC |
624 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
625 | if (tui_rl_outstream == 0) | |
e0e6bcab GB |
626 | error (_("Cannot redirect readline output")); |
627 | ||
0f59c96f | 628 | setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0); |
c906108c | 629 | |
a198b876 SC |
630 | #ifdef O_NONBLOCK |
631 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 632 | #else |
a198b876 SC |
633 | #ifdef O_NDELAY |
634 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 635 | #endif |
a198b876 | 636 | #endif |
a198b876 | 637 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
638 | #else |
639 | tui_rl_outstream = stdout; | |
640 | #endif | |
a198b876 SC |
641 | } |
642 | ||
1cc6d956 MS |
643 | /* Get a character from the command window. This is called from the |
644 | readline package. */ | |
a198b876 SC |
645 | int |
646 | tui_getc (FILE *fp) | |
647 | { | |
648 | int ch; | |
649 | WINDOW *w; | |
650 | ||
6d012f14 | 651 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 652 | |
8cee930b | 653 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 654 | /* Flush readline output. */ |
01f69b38 | 655 | tui_readline_output (0, 0); |
8cee930b SC |
656 | #endif |
657 | ||
a198b876 | 658 | ch = wgetch (w); |
6ba8e26f | 659 | ch = tui_handle_resize_during_io (ch); |
c906108c | 660 | |
1cc6d956 MS |
661 | /* The \n must be echoed because it will not be printed by |
662 | readline. */ | |
a198b876 SC |
663 | if (ch == '\n') |
664 | { | |
665 | /* When hitting return with an empty input, gdb executes the last | |
666 | command. If we emit a newline, this fills up the command window | |
667 | with empty lines with gdb prompt at beginning. Instead of that, | |
668 | stay on the same line but provide a visual effect to show the | |
669 | user we recognized the command. */ | |
670 | if (rl_end == 0) | |
671 | { | |
6d012f14 | 672 | wmove (w, TUI_CMD_WIN->detail.command_info.cur_line, 0); |
a198b876 SC |
673 | |
674 | /* Clear the line. This will blink the gdb prompt since | |
675 | it will be redrawn at the same line. */ | |
676 | wclrtoeol (w); | |
677 | wrefresh (w); | |
678 | napms (20); | |
679 | } | |
680 | else | |
681 | { | |
6d012f14 AC |
682 | wmove (w, TUI_CMD_WIN->detail.command_info.cur_line, |
683 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 SC |
684 | waddch (w, ch); |
685 | } | |
686 | } | |
687 | ||
bcdf1568 | 688 | if (key_is_command_char (ch)) |
1cc6d956 | 689 | { /* Handle prev/next/up/down here. */ |
b0a30fce | 690 | ch = tui_dispatch_ctrl_char (ch); |
c906108c | 691 | } |
a198b876 | 692 | |
c906108c | 693 | if (ch == '\n' || ch == '\r' || ch == '\f') |
6d012f14 | 694 | TUI_CMD_WIN->detail.command_info.curch = 0; |
a198b876 SC |
695 | if (ch == KEY_BACKSPACE) |
696 | return '\b'; | |
d64e57fa PP |
697 | |
698 | if (async_command_editing_p && key_is_start_sequence (ch)) | |
699 | { | |
700 | int ch_pending; | |
701 | ||
702 | nodelay (w, TRUE); | |
703 | ch_pending = wgetch (w); | |
704 | nodelay (w, FALSE); | |
705 | ||
706 | /* If we have pending input following a start sequence, call the stdin | |
707 | event handler again because ncurses may have already read and stored | |
708 | the input into its internal buffer, meaning that we won't get an stdin | |
709 | event for it. If we don't compensate for this missed stdin event, key | |
710 | sequences as Alt_F (^[f) will not behave promptly. | |
711 | ||
712 | (We only compensates for the missed 2nd byte of a key sequence because | |
713 | 2-byte sequences are by far the most commonly used. ncurses may have | |
714 | buffered a larger, 3+-byte key sequence though it remains to be seen | |
715 | whether it is useful to compensate for all the bytes of such | |
716 | sequences.) */ | |
717 | if (ch_pending != ERR) | |
718 | { | |
719 | ungetch (ch_pending); | |
720 | call_stdin_event_handler_again_p = 1; | |
721 | } | |
722 | } | |
723 | ||
c906108c | 724 | return ch; |
a198b876 | 725 | } |
c906108c | 726 | |
c906108c | 727 | |
a198b876 SC |
728 | /* Cleanup when a resize has occured. |
729 | Returns the character that must be processed. */ | |
c906108c | 730 | static unsigned int |
6ba8e26f | 731 | tui_handle_resize_during_io (unsigned int original_ch) |
c906108c | 732 | { |
dd1abb8c | 733 | if (tui_win_resized ()) |
c906108c | 734 | { |
36900355 | 735 | tui_resize_all (); |
a21fcd8f | 736 | tui_refresh_all_win (); |
c906108c | 737 | dont_repeat (); |
dd1abb8c | 738 | tui_set_win_resized_to (FALSE); |
c906108c SS |
739 | return '\n'; |
740 | } | |
741 | else | |
6ba8e26f | 742 | return original_ch; |
a198b876 | 743 | } |