Commit | Line | Data |
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f377b406 | 1 | /* TUI support I/O functions. |
f33c6cbf | 2 | |
ecd75fc8 | 3 | Copyright (C) 1998-2014 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> |
96ec9981 | 39 | #include <stdio.h> |
614c279d | 40 | #include "filestuff.h" |
96ec9981 | 41 | |
6a83354a | 42 | #include "gdb_curses.h" |
a198b876 | 43 | |
4a1bcc8c MK |
44 | /* This redefines CTRL if it is not already defined, so it must come |
45 | after terminal state releated include files like <term.h> and | |
46 | "gdb_curses.h". */ | |
47 | #include "readline/readline.h" | |
48 | ||
bcdf1568 AC |
49 | int |
50 | key_is_start_sequence (int ch) | |
51 | { | |
52 | return (ch == 27); | |
53 | } | |
54 | ||
55 | int | |
56 | key_is_end_sequence (int ch) | |
57 | { | |
58 | return (ch == 126); | |
59 | } | |
60 | ||
61 | int | |
62 | key_is_backspace (int ch) | |
63 | { | |
64 | return (ch == 8); | |
65 | } | |
66 | ||
67 | int | |
68 | key_is_command_char (int ch) | |
69 | { | |
70 | return ((ch == KEY_NPAGE) || (ch == KEY_PPAGE) | |
71 | || (ch == KEY_LEFT) || (ch == KEY_RIGHT) | |
72 | || (ch == KEY_UP) || (ch == KEY_DOWN) | |
73 | || (ch == KEY_SF) || (ch == KEY_SR) | |
e5908723 MS |
74 | || (ch == (int)'\f') |
75 | || key_is_start_sequence (ch)); | |
bcdf1568 AC |
76 | } |
77 | ||
ec6f8892 SC |
78 | /* Use definition from readline 4.3. */ |
79 | #undef CTRL_CHAR | |
08ef48c5 MS |
80 | #define CTRL_CHAR(c) \ |
81 | ((c) < control_character_threshold && (((c) & 0x80) == 0)) | |
ec6f8892 | 82 | |
a198b876 SC |
83 | /* This file controls the IO interactions between gdb and curses. |
84 | When the TUI is enabled, gdb has two modes a curses and a standard | |
85 | mode. | |
86 | ||
1cc6d956 MS |
87 | In curses mode, the gdb outputs are made in a curses command |
88 | window. For this, the gdb_stdout and gdb_stderr are redirected to | |
89 | the specific ui_file implemented by TUI. The output is handled by | |
90 | tui_puts(). The input is also controlled by curses with | |
91 | tui_getc(). The readline library uses this function to get its | |
92 | input. Several readline hooks are installed to redirect readline | |
93 | output to the TUI (see also the note below). | |
a198b876 SC |
94 | |
95 | In normal mode, the gdb outputs are restored to their origin, that | |
96 | is as if TUI is not used. Readline also uses its original getc() | |
97 | function with stdin. | |
98 | ||
1cc6d956 MS |
99 | Note SCz/2001-07-21: the current readline is not clean in its |
100 | management of the output. Even if we install a redisplay handler, | |
101 | it sometimes writes on a stdout file. It is important to redirect | |
102 | every output produced by readline, otherwise the curses window will | |
103 | be garbled. This is implemented with a pipe that TUI reads and | |
104 | readline writes to. A gdb input handler is created so that reading | |
105 | the pipe is handled automatically. This will probably not work on | |
106 | non-Unix platforms. The best fix is to make readline clean enougth | |
107 | so that is never write on stdout. | |
108 | ||
109 | Note SCz/2002-09-01: we now use more readline hooks and it seems | |
110 | that with them we don't need the pipe anymore (verified by creating | |
111 | the pipe and closing its end so that write causes a SIGPIPE). The | |
112 | old pipe code is still there and can be conditionally removed by | |
8cee930b SC |
113 | #undef TUI_USE_PIPE_FOR_READLINE. */ |
114 | ||
115 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ | |
a156a290 | 116 | #ifdef HAVE_PIPE |
8cee930b | 117 | #define TUI_USE_PIPE_FOR_READLINE |
a156a290 | 118 | #endif |
1cc6d956 | 119 | /* #undef TUI_USE_PIPE_FOR_READLINE */ |
a198b876 SC |
120 | |
121 | /* TUI output files. */ | |
122 | static struct ui_file *tui_stdout; | |
123 | static struct ui_file *tui_stderr; | |
2b68e2c5 | 124 | struct ui_out *tui_out; |
a198b876 SC |
125 | |
126 | /* GDB output files in non-curses mode. */ | |
127 | static struct ui_file *tui_old_stdout; | |
128 | static struct ui_file *tui_old_stderr; | |
2b68e2c5 | 129 | struct ui_out *tui_old_uiout; |
a198b876 SC |
130 | |
131 | /* Readline previous hooks. */ | |
840ed64d JK |
132 | static rl_getc_func_t *tui_old_rl_getc_function; |
133 | static rl_voidfunc_t *tui_old_rl_redisplay_function; | |
134 | static rl_vintfunc_t *tui_old_rl_prep_terminal; | |
135 | static rl_voidfunc_t *tui_old_rl_deprep_terminal; | |
cc88a640 | 136 | static int tui_old_rl_echoing_p; |
a198b876 SC |
137 | |
138 | /* Readline output stream. | |
139 | Should be removed when readline is clean. */ | |
140 | static FILE *tui_rl_outstream; | |
141 | static FILE *tui_old_rl_outstream; | |
8cee930b | 142 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 143 | static int tui_readline_pipe[2]; |
8cee930b | 144 | #endif |
c906108c | 145 | |
57266a33 SC |
146 | /* The last gdb prompt that was registered in readline. |
147 | This may be the main gdb prompt or a secondary prompt. */ | |
148 | static char *tui_rl_saved_prompt; | |
149 | ||
6ba8e26f | 150 | static unsigned int tui_handle_resize_during_io (unsigned int); |
c906108c | 151 | |
8cee930b SC |
152 | static void |
153 | tui_putc (char c) | |
154 | { | |
155 | char buf[2]; | |
156 | ||
157 | buf[0] = c; | |
158 | buf[1] = 0; | |
159 | tui_puts (buf); | |
160 | } | |
c906108c | 161 | |
a198b876 | 162 | /* Print the string in the curses command window. */ |
c906108c | 163 | void |
a198b876 | 164 | tui_puts (const char *string) |
c906108c | 165 | { |
a198b876 SC |
166 | static int tui_skip_line = -1; |
167 | char c; | |
168 | WINDOW *w; | |
c906108c | 169 | |
6d012f14 | 170 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 171 | while ((c = *string++) != 0) |
c906108c | 172 | { |
a198b876 SC |
173 | /* Catch annotation and discard them. We need two \032 and |
174 | discard until a \n is seen. */ | |
175 | if (c == '\032') | |
176 | { | |
177 | tui_skip_line++; | |
178 | } | |
179 | else if (tui_skip_line != 1) | |
180 | { | |
181 | tui_skip_line = -1; | |
182 | waddch (w, c); | |
183 | } | |
184 | else if (c == '\n') | |
185 | tui_skip_line = -1; | |
186 | } | |
6d012f14 AC |
187 | getyx (w, TUI_CMD_WIN->detail.command_info.cur_line, |
188 | TUI_CMD_WIN->detail.command_info.curch); | |
9a2b4c1b MS |
189 | TUI_CMD_WIN->detail.command_info.start_line |
190 | = TUI_CMD_WIN->detail.command_info.cur_line; | |
a198b876 SC |
191 | |
192 | /* We could defer the following. */ | |
193 | wrefresh (w); | |
194 | fflush (stdout); | |
195 | } | |
196 | ||
197 | /* Readline callback. | |
198 | Redisplay the command line with its prompt after readline has | |
199 | changed the edited text. */ | |
e09d2eba | 200 | void |
a198b876 SC |
201 | tui_redisplay_readline (void) |
202 | { | |
203 | int prev_col; | |
204 | int height; | |
205 | int col, line; | |
206 | int c_pos; | |
207 | int c_line; | |
208 | int in; | |
209 | WINDOW *w; | |
210 | char *prompt; | |
211 | int start_line; | |
e3da6fc5 SC |
212 | |
213 | /* Detect when we temporarily left SingleKey and now the readline | |
1cc6d956 | 214 | edit buffer is empty, automatically restore the SingleKey |
9b8d6827 SC |
215 | mode. The restore must only be done if the command has finished. |
216 | The command could call prompt_for_continue and we must not | |
217 | restore SingleKey so that the prompt and normal keymap are used. */ | |
218 | if (tui_current_key_mode == TUI_ONE_COMMAND_MODE && rl_end == 0 | |
219 | && immediate_quit == 0) | |
6d012f14 | 220 | tui_set_key_mode (TUI_SINGLE_KEY_MODE); |
e3da6fc5 | 221 | |
6d012f14 | 222 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
e09d2eba SC |
223 | prompt = ""; |
224 | else | |
57266a33 | 225 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
226 | |
227 | c_pos = -1; | |
228 | c_line = -1; | |
6d012f14 AC |
229 | w = TUI_CMD_WIN->generic.handle; |
230 | start_line = TUI_CMD_WIN->detail.command_info.start_line; | |
a198b876 SC |
231 | wmove (w, start_line, 0); |
232 | prev_col = 0; | |
233 | height = 1; | |
234 | for (in = 0; prompt && prompt[in]; in++) | |
235 | { | |
236 | waddch (w, prompt[in]); | |
237 | getyx (w, line, col); | |
238 | if (col < prev_col) | |
239 | height++; | |
240 | prev_col = col; | |
241 | } | |
242 | for (in = 0; in < rl_end; in++) | |
243 | { | |
244 | unsigned char c; | |
245 | ||
246 | c = (unsigned char) rl_line_buffer[in]; | |
247 | if (in == rl_point) | |
248 | { | |
249 | getyx (w, c_line, c_pos); | |
250 | } | |
251 | ||
252 | if (CTRL_CHAR (c) || c == RUBOUT) | |
253 | { | |
254 | waddch (w, '^'); | |
255 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
256 | } | |
c906108c SS |
257 | else |
258 | { | |
a198b876 | 259 | waddch (w, c); |
c906108c | 260 | } |
a198b876 SC |
261 | if (c == '\n') |
262 | { | |
6d012f14 AC |
263 | getyx (w, TUI_CMD_WIN->detail.command_info.start_line, |
264 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 SC |
265 | } |
266 | getyx (w, line, col); | |
267 | if (col < prev_col) | |
268 | height++; | |
269 | prev_col = col; | |
c906108c | 270 | } |
a198b876 | 271 | wclrtobot (w); |
6d012f14 AC |
272 | getyx (w, TUI_CMD_WIN->detail.command_info.start_line, |
273 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 | 274 | if (c_line >= 0) |
d75e970c SC |
275 | { |
276 | wmove (w, c_line, c_pos); | |
6d012f14 AC |
277 | TUI_CMD_WIN->detail.command_info.cur_line = c_line; |
278 | TUI_CMD_WIN->detail.command_info.curch = c_pos; | |
d75e970c | 279 | } |
6d012f14 | 280 | TUI_CMD_WIN->detail.command_info.start_line -= height - 1; |
a198b876 | 281 | |
a198b876 SC |
282 | wrefresh (w); |
283 | fflush(stdout); | |
284 | } | |
285 | ||
1cc6d956 MS |
286 | /* Readline callback to prepare the terminal. It is called once each |
287 | time we enter readline. Terminal is already setup in curses | |
288 | mode. */ | |
a198b876 | 289 | static void |
88fa91b4 | 290 | tui_prep_terminal (int notused1) |
c906108c | 291 | { |
57266a33 SC |
292 | /* Save the prompt registered in readline to correctly display it. |
293 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
294 | rl_prompt because it points to an alloca buffer). */ | |
295 | xfree (tui_rl_saved_prompt); | |
296 | tui_rl_saved_prompt = xstrdup (rl_prompt); | |
a198b876 | 297 | } |
c906108c | 298 | |
1cc6d956 MS |
299 | /* Readline callback to restore the terminal. It is called once each |
300 | time we leave readline. There is nothing to do in curses mode. */ | |
a198b876 SC |
301 | static void |
302 | tui_deprep_terminal (void) | |
303 | { | |
304 | } | |
c906108c | 305 | |
8cee930b | 306 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
307 | /* Read readline output pipe and feed the command window with it. |
308 | Should be removed when readline is clean. */ | |
309 | static void | |
01f69b38 | 310 | tui_readline_output (int error, gdb_client_data data) |
a198b876 SC |
311 | { |
312 | int size; | |
313 | char buf[256]; | |
c906108c | 314 | |
a198b876 SC |
315 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
316 | if (size > 0 && tui_active) | |
c906108c | 317 | { |
a198b876 SC |
318 | buf[size] = 0; |
319 | tui_puts (buf); | |
c906108c | 320 | } |
a198b876 | 321 | } |
8cee930b SC |
322 | #endif |
323 | ||
324 | /* Return the portion of PATHNAME that should be output when listing | |
325 | possible completions. If we are hacking filename completion, we | |
326 | are only interested in the basename, the portion following the | |
327 | final slash. Otherwise, we return what we were passed. | |
328 | ||
1cc6d956 | 329 | Comes from readline/complete.c. */ |
9f37bbcc PA |
330 | static const char * |
331 | printable_part (const char *pathname) | |
8cee930b | 332 | { |
9f37bbcc | 333 | return rl_filename_completion_desired ? lbasename (pathname) : pathname; |
8cee930b SC |
334 | } |
335 | ||
1cc6d956 MS |
336 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and |
337 | we are using it, check for and output a single character for | |
338 | `special' filenames. Return the number of characters we | |
339 | output. */ | |
8cee930b SC |
340 | |
341 | #define PUTX(c) \ | |
342 | do { \ | |
343 | if (CTRL_CHAR (c)) \ | |
344 | { \ | |
345 | tui_puts ("^"); \ | |
346 | tui_putc (UNCTRL (c)); \ | |
347 | printed_len += 2; \ | |
348 | } \ | |
349 | else if (c == RUBOUT) \ | |
350 | { \ | |
351 | tui_puts ("^?"); \ | |
352 | printed_len += 2; \ | |
353 | } \ | |
354 | else \ | |
355 | { \ | |
356 | tui_putc (c); \ | |
357 | printed_len++; \ | |
358 | } \ | |
359 | } while (0) | |
360 | ||
361 | static int | |
9f37bbcc | 362 | print_filename (const char *to_print, const char *full_pathname) |
8cee930b SC |
363 | { |
364 | int printed_len = 0; | |
9f37bbcc | 365 | const char *s; |
8cee930b SC |
366 | |
367 | for (s = to_print; *s; s++) | |
368 | { | |
369 | PUTX (*s); | |
370 | } | |
371 | return printed_len; | |
372 | } | |
373 | ||
374 | /* The user must press "y" or "n". Non-zero return means "y" pressed. | |
1cc6d956 | 375 | Comes from readline/complete.c. */ |
8cee930b | 376 | static int |
d02c80cd | 377 | get_y_or_n (void) |
8cee930b SC |
378 | { |
379 | extern int _rl_abort_internal (); | |
380 | int c; | |
381 | ||
382 | for (;;) | |
383 | { | |
384 | c = rl_read_key (); | |
385 | if (c == 'y' || c == 'Y' || c == ' ') | |
386 | return (1); | |
387 | if (c == 'n' || c == 'N' || c == RUBOUT) | |
388 | return (0); | |
389 | if (c == ABORT_CHAR) | |
390 | _rl_abort_internal (); | |
391 | beep (); | |
392 | } | |
393 | } | |
394 | ||
395 | /* A convenience function for displaying a list of strings in | |
396 | columnar format on readline's output stream. MATCHES is the list | |
397 | of strings, in argv format, LEN is the number of strings in MATCHES, | |
398 | and MAX is the length of the longest string in MATCHES. | |
399 | ||
400 | Comes from readline/complete.c and modified to write in | |
401 | the TUI command window using tui_putc/tui_puts. */ | |
402 | static void | |
d02c80cd | 403 | tui_rl_display_match_list (char **matches, int len, int max) |
8cee930b SC |
404 | { |
405 | typedef int QSFUNC (const void *, const void *); | |
08ef48c5 MS |
406 | extern int _rl_qsort_string_compare (const void *, |
407 | const void *); | |
8cee930b SC |
408 | extern int _rl_print_completions_horizontally; |
409 | ||
410 | int count, limit, printed_len; | |
411 | int i, j, k, l; | |
9f37bbcc | 412 | const char *temp; |
8cee930b SC |
413 | |
414 | /* Screen dimension correspond to the TUI command window. */ | |
6d012f14 | 415 | int screenwidth = TUI_CMD_WIN->generic.width; |
8cee930b SC |
416 | |
417 | /* If there are many items, then ask the user if she really wants to | |
1cc6d956 | 418 | see them all. */ |
8cee930b SC |
419 | if (len >= rl_completion_query_items) |
420 | { | |
421 | char msg[256]; | |
422 | ||
8c042590 PM |
423 | xsnprintf (msg, sizeof (msg), |
424 | "\nDisplay all %d possibilities? (y or n)", len); | |
8cee930b SC |
425 | tui_puts (msg); |
426 | if (get_y_or_n () == 0) | |
427 | { | |
428 | tui_puts ("\n"); | |
429 | return; | |
430 | } | |
431 | } | |
432 | ||
1cc6d956 | 433 | /* How many items of MAX length can we fit in the screen window? */ |
8cee930b SC |
434 | max += 2; |
435 | limit = screenwidth / max; | |
436 | if (limit != 1 && (limit * max == screenwidth)) | |
437 | limit--; | |
438 | ||
1cc6d956 MS |
439 | /* Avoid a possible floating exception. If max > screenwidth, limit |
440 | will be 0 and a divide-by-zero fault will result. */ | |
8cee930b SC |
441 | if (limit == 0) |
442 | limit = 1; | |
443 | ||
1cc6d956 | 444 | /* How many iterations of the printing loop? */ |
8cee930b SC |
445 | count = (len + (limit - 1)) / limit; |
446 | ||
447 | /* Watch out for special case. If LEN is less than LIMIT, then | |
448 | just do the inner printing loop. | |
1cc6d956 | 449 | 0 < len <= limit implies count = 1. */ |
8cee930b | 450 | |
1cc6d956 | 451 | /* Sort the items if they are not already sorted. */ |
8cee930b SC |
452 | if (rl_ignore_completion_duplicates == 0) |
453 | qsort (matches + 1, len, sizeof (char *), | |
454 | (QSFUNC *)_rl_qsort_string_compare); | |
455 | ||
456 | tui_putc ('\n'); | |
457 | ||
458 | if (_rl_print_completions_horizontally == 0) | |
459 | { | |
1cc6d956 | 460 | /* Print the sorted items, up-and-down alphabetically, like ls. */ |
8cee930b SC |
461 | for (i = 1; i <= count; i++) |
462 | { | |
463 | for (j = 0, l = i; j < limit; j++) | |
464 | { | |
465 | if (l > len || matches[l] == 0) | |
466 | break; | |
467 | else | |
468 | { | |
469 | temp = printable_part (matches[l]); | |
470 | printed_len = print_filename (temp, matches[l]); | |
471 | ||
472 | if (j + 1 < limit) | |
473 | for (k = 0; k < max - printed_len; k++) | |
474 | tui_putc (' '); | |
475 | } | |
476 | l += count; | |
477 | } | |
478 | tui_putc ('\n'); | |
479 | } | |
480 | } | |
481 | else | |
482 | { | |
1cc6d956 | 483 | /* Print the sorted items, across alphabetically, like ls -x. */ |
8cee930b SC |
484 | for (i = 1; matches[i]; i++) |
485 | { | |
486 | temp = printable_part (matches[i]); | |
487 | printed_len = print_filename (temp, matches[i]); | |
1cc6d956 | 488 | /* Have we reached the end of this line? */ |
8cee930b SC |
489 | if (matches[i+1]) |
490 | { | |
491 | if (i && (limit > 1) && (i % limit) == 0) | |
492 | tui_putc ('\n'); | |
493 | else | |
494 | for (k = 0; k < max - printed_len; k++) | |
495 | tui_putc (' '); | |
496 | } | |
497 | } | |
498 | tui_putc ('\n'); | |
499 | } | |
500 | } | |
a198b876 SC |
501 | |
502 | /* Setup the IO for curses or non-curses mode. | |
503 | - In non-curses mode, readline and gdb use the standard input and | |
504 | standard output/error directly. | |
505 | - In curses mode, the standard output/error is controlled by TUI | |
506 | with the tui_stdout and tui_stderr. The output is redirected in | |
507 | the curses command window. Several readline callbacks are installed | |
508 | so that readline asks for its input to the curses command window | |
509 | with wgetch(). */ | |
510 | void | |
511 | tui_setup_io (int mode) | |
512 | { | |
cc88a640 JK |
513 | extern int _rl_echoing_p; |
514 | ||
a198b876 | 515 | if (mode) |
c906108c | 516 | { |
a198b876 SC |
517 | /* Redirect readline to TUI. */ |
518 | tui_old_rl_redisplay_function = rl_redisplay_function; | |
519 | tui_old_rl_deprep_terminal = rl_deprep_term_function; | |
520 | tui_old_rl_prep_terminal = rl_prep_term_function; | |
521 | tui_old_rl_getc_function = rl_getc_function; | |
522 | tui_old_rl_outstream = rl_outstream; | |
cc88a640 | 523 | tui_old_rl_echoing_p = _rl_echoing_p; |
a198b876 SC |
524 | rl_redisplay_function = tui_redisplay_readline; |
525 | rl_deprep_term_function = tui_deprep_terminal; | |
526 | rl_prep_term_function = tui_prep_terminal; | |
527 | rl_getc_function = tui_getc; | |
cc88a640 | 528 | _rl_echoing_p = 0; |
a198b876 SC |
529 | rl_outstream = tui_rl_outstream; |
530 | rl_prompt = 0; | |
8cee930b SC |
531 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
532 | rl_already_prompted = 0; | |
a198b876 SC |
533 | |
534 | /* Keep track of previous gdb output. */ | |
535 | tui_old_stdout = gdb_stdout; | |
536 | tui_old_stderr = gdb_stderr; | |
79a45e25 | 537 | tui_old_uiout = current_uiout; |
a198b876 SC |
538 | |
539 | /* Reconfigure gdb output. */ | |
540 | gdb_stdout = tui_stdout; | |
541 | gdb_stderr = tui_stderr; | |
542 | gdb_stdlog = gdb_stdout; /* for moment */ | |
543 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 544 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 545 | current_uiout = tui_out; |
9d876a16 SC |
546 | |
547 | /* Save tty for SIGCONT. */ | |
548 | savetty (); | |
c906108c | 549 | } |
a198b876 | 550 | else |
c906108c | 551 | { |
a198b876 SC |
552 | /* Restore gdb output. */ |
553 | gdb_stdout = tui_old_stdout; | |
554 | gdb_stderr = tui_old_stderr; | |
555 | gdb_stdlog = gdb_stdout; /* for moment */ | |
556 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 557 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 558 | current_uiout = tui_old_uiout; |
a198b876 SC |
559 | |
560 | /* Restore readline. */ | |
561 | rl_redisplay_function = tui_old_rl_redisplay_function; | |
562 | rl_deprep_term_function = tui_old_rl_deprep_terminal; | |
563 | rl_prep_term_function = tui_old_rl_prep_terminal; | |
564 | rl_getc_function = tui_old_rl_getc_function; | |
565 | rl_outstream = tui_old_rl_outstream; | |
8cee930b | 566 | rl_completion_display_matches_hook = 0; |
cc88a640 | 567 | _rl_echoing_p = tui_old_rl_echoing_p; |
bd9b0abf | 568 | rl_already_prompted = 0; |
9d876a16 SC |
569 | |
570 | /* Save tty for SIGCONT. */ | |
571 | savetty (); | |
572 | } | |
573 | } | |
574 | ||
575 | #ifdef SIGCONT | |
576 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ | |
577 | static void | |
578 | tui_cont_sig (int sig) | |
579 | { | |
580 | if (tui_active) | |
581 | { | |
582 | /* Restore the terminal setting because another process (shell) | |
583 | might have changed it. */ | |
584 | resetty (); | |
585 | ||
586 | /* Force a refresh of the screen. */ | |
a21fcd8f | 587 | tui_refresh_all_win (); |
d75e970c SC |
588 | |
589 | /* Update cursor position on the screen. */ | |
6d012f14 AC |
590 | wmove (TUI_CMD_WIN->generic.handle, |
591 | TUI_CMD_WIN->detail.command_info.start_line, | |
592 | TUI_CMD_WIN->detail.command_info.curch); | |
593 | wrefresh (TUI_CMD_WIN->generic.handle); | |
c906108c | 594 | } |
9d876a16 | 595 | signal (sig, tui_cont_sig); |
a198b876 | 596 | } |
9d876a16 | 597 | #endif |
c906108c | 598 | |
a198b876 SC |
599 | /* Initialize the IO for gdb in curses mode. */ |
600 | void | |
d02c80cd | 601 | tui_initialize_io (void) |
a198b876 | 602 | { |
9d876a16 SC |
603 | #ifdef SIGCONT |
604 | signal (SIGCONT, tui_cont_sig); | |
605 | #endif | |
606 | ||
a198b876 SC |
607 | /* Create tui output streams. */ |
608 | tui_stdout = tui_fileopen (stdout); | |
609 | tui_stderr = tui_fileopen (stderr); | |
610 | tui_out = tui_out_new (tui_stdout); | |
611 | ||
43df09d9 | 612 | /* Create the default UI. */ |
4801a9a3 | 613 | tui_old_uiout = cli_out_new (gdb_stdout); |
a198b876 | 614 | |
8cee930b | 615 | #ifdef TUI_USE_PIPE_FOR_READLINE |
1cc6d956 MS |
616 | /* Temporary solution for readline writing to stdout: redirect |
617 | readline output in a pipe, read that pipe and output the content | |
618 | in the curses command window. */ | |
614c279d | 619 | if (gdb_pipe_cloexec (tui_readline_pipe) != 0) |
c906108c | 620 | { |
a198b876 SC |
621 | fprintf_unfiltered (gdb_stderr, "Cannot create pipe for readline"); |
622 | exit (1); | |
c906108c | 623 | } |
a198b876 SC |
624 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
625 | if (tui_rl_outstream == 0) | |
c906108c | 626 | { |
a198b876 SC |
627 | fprintf_unfiltered (gdb_stderr, "Cannot redirect readline output"); |
628 | exit (1); | |
c906108c | 629 | } |
0f59c96f | 630 | setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0); |
c906108c | 631 | |
a198b876 SC |
632 | #ifdef O_NONBLOCK |
633 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 634 | #else |
a198b876 SC |
635 | #ifdef O_NDELAY |
636 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 637 | #endif |
a198b876 | 638 | #endif |
a198b876 | 639 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
640 | #else |
641 | tui_rl_outstream = stdout; | |
642 | #endif | |
a198b876 SC |
643 | } |
644 | ||
1cc6d956 MS |
645 | /* Get a character from the command window. This is called from the |
646 | readline package. */ | |
a198b876 SC |
647 | int |
648 | tui_getc (FILE *fp) | |
649 | { | |
650 | int ch; | |
651 | WINDOW *w; | |
652 | ||
6d012f14 | 653 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 654 | |
8cee930b | 655 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 656 | /* Flush readline output. */ |
01f69b38 | 657 | tui_readline_output (0, 0); |
8cee930b SC |
658 | #endif |
659 | ||
a198b876 | 660 | ch = wgetch (w); |
6ba8e26f | 661 | ch = tui_handle_resize_during_io (ch); |
c906108c | 662 | |
1cc6d956 MS |
663 | /* The \n must be echoed because it will not be printed by |
664 | readline. */ | |
a198b876 SC |
665 | if (ch == '\n') |
666 | { | |
667 | /* When hitting return with an empty input, gdb executes the last | |
668 | command. If we emit a newline, this fills up the command window | |
669 | with empty lines with gdb prompt at beginning. Instead of that, | |
670 | stay on the same line but provide a visual effect to show the | |
671 | user we recognized the command. */ | |
672 | if (rl_end == 0) | |
673 | { | |
6d012f14 | 674 | wmove (w, TUI_CMD_WIN->detail.command_info.cur_line, 0); |
a198b876 SC |
675 | |
676 | /* Clear the line. This will blink the gdb prompt since | |
677 | it will be redrawn at the same line. */ | |
678 | wclrtoeol (w); | |
679 | wrefresh (w); | |
680 | napms (20); | |
681 | } | |
682 | else | |
683 | { | |
6d012f14 AC |
684 | wmove (w, TUI_CMD_WIN->detail.command_info.cur_line, |
685 | TUI_CMD_WIN->detail.command_info.curch); | |
a198b876 SC |
686 | waddch (w, ch); |
687 | } | |
688 | } | |
689 | ||
bcdf1568 | 690 | if (key_is_command_char (ch)) |
1cc6d956 | 691 | { /* Handle prev/next/up/down here. */ |
b0a30fce | 692 | ch = tui_dispatch_ctrl_char (ch); |
c906108c | 693 | } |
a198b876 | 694 | |
c906108c | 695 | if (ch == '\n' || ch == '\r' || ch == '\f') |
6d012f14 | 696 | TUI_CMD_WIN->detail.command_info.curch = 0; |
a198b876 SC |
697 | if (ch == KEY_BACKSPACE) |
698 | return '\b'; | |
699 | ||
c906108c | 700 | return ch; |
a198b876 | 701 | } |
c906108c | 702 | |
c906108c | 703 | |
a198b876 SC |
704 | /* Cleanup when a resize has occured. |
705 | Returns the character that must be processed. */ | |
c906108c | 706 | static unsigned int |
6ba8e26f | 707 | tui_handle_resize_during_io (unsigned int original_ch) |
c906108c | 708 | { |
dd1abb8c | 709 | if (tui_win_resized ()) |
c906108c | 710 | { |
36900355 | 711 | tui_resize_all (); |
a21fcd8f | 712 | tui_refresh_all_win (); |
c906108c | 713 | dont_repeat (); |
dd1abb8c | 714 | tui_set_win_resized_to (FALSE); |
c906108c SS |
715 | return '\n'; |
716 | } | |
717 | else | |
6ba8e26f | 718 | return original_ch; |
a198b876 | 719 | } |