Commit | Line | Data |
---|---|---|
f377b406 | 1 | /* TUI support I/O functions. |
f33c6cbf | 2 | |
bcdf1568 AC |
3 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software |
4 | Foundation, Inc. | |
f33c6cbf | 5 | |
f377b406 SC |
6 | Contributed by Hewlett-Packard Company. |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c | 24 | |
c906108c SS |
25 | #include "defs.h" |
26 | #include "terminal.h" | |
a198b876 SC |
27 | #include "target.h" |
28 | #include "event-loop.h" | |
e09d2eba | 29 | #include "event-top.h" |
a198b876 SC |
30 | #include "command.h" |
31 | #include "top.h" | |
32 | #include "readline/readline.h" | |
d7b2e967 AC |
33 | #include "tui/tui.h" |
34 | #include "tui/tui-data.h" | |
35 | #include "tui/tui-io.h" | |
36 | #include "tui/tui-command.h" | |
37 | #include "tui/tui-win.h" | |
38 | #include "tui/tui-wingeneral.h" | |
39 | #include "tui/tui-file.h" | |
a198b876 SC |
40 | #include "ui-out.h" |
41 | #include "cli-out.h" | |
42 | #include <fcntl.h> | |
9d876a16 | 43 | #include <signal.h> |
96ec9981 DJ |
44 | #include <stdio.h> |
45 | ||
46 | #ifdef HAVE_NCURSES_H | |
47 | #include <ncurses.h> | |
48 | #else | |
49 | #ifdef HAVE_CURSES_H | |
50 | #include <curses.h> | |
51 | #endif | |
52 | #endif | |
a198b876 | 53 | |
bcdf1568 AC |
54 | int |
55 | key_is_start_sequence (int ch) | |
56 | { | |
57 | return (ch == 27); | |
58 | } | |
59 | ||
60 | int | |
61 | key_is_end_sequence (int ch) | |
62 | { | |
63 | return (ch == 126); | |
64 | } | |
65 | ||
66 | int | |
67 | key_is_backspace (int ch) | |
68 | { | |
69 | return (ch == 8); | |
70 | } | |
71 | ||
72 | int | |
73 | key_is_command_char (int ch) | |
74 | { | |
75 | return ((ch == KEY_NPAGE) || (ch == KEY_PPAGE) | |
76 | || (ch == KEY_LEFT) || (ch == KEY_RIGHT) | |
77 | || (ch == KEY_UP) || (ch == KEY_DOWN) | |
78 | || (ch == KEY_SF) || (ch == KEY_SR) | |
79 | || (ch == (int)'\f') || key_is_start_sequence (ch)); | |
80 | } | |
81 | ||
ec6f8892 SC |
82 | /* Use definition from readline 4.3. */ |
83 | #undef CTRL_CHAR | |
84 | #define CTRL_CHAR(c) ((c) < control_character_threshold && (((c) & 0x80) == 0)) | |
85 | ||
a198b876 SC |
86 | /* This file controls the IO interactions between gdb and curses. |
87 | When the TUI is enabled, gdb has two modes a curses and a standard | |
88 | mode. | |
89 | ||
90 | In curses mode, the gdb outputs are made in a curses command window. | |
91 | For this, the gdb_stdout and gdb_stderr are redirected to the specific | |
92 | ui_file implemented by TUI. The output is handled by tui_puts(). | |
93 | The input is also controlled by curses with tui_getc(). The readline | |
94 | library uses this function to get its input. Several readline hooks | |
95 | are installed to redirect readline output to the TUI (see also the | |
96 | note below). | |
97 | ||
98 | In normal mode, the gdb outputs are restored to their origin, that | |
99 | is as if TUI is not used. Readline also uses its original getc() | |
100 | function with stdin. | |
101 | ||
8cee930b SC |
102 | Note SCz/2001-07-21: the current readline is not clean in its management of |
103 | the output. Even if we install a redisplay handler, it sometimes writes on | |
104 | a stdout file. It is important to redirect every output produced by | |
105 | readline, otherwise the curses window will be garbled. This is implemented | |
106 | with a pipe that TUI reads and readline writes to. A gdb input handler | |
a198b876 SC |
107 | is created so that reading the pipe is handled automatically. |
108 | This will probably not work on non-Unix platforms. The best fix is | |
8cee930b SC |
109 | to make readline clean enougth so that is never write on stdout. |
110 | ||
111 | Note SCz/2002-09-01: we now use more readline hooks and it seems that | |
112 | with them we don't need the pipe anymore (verified by creating the pipe | |
113 | and closing its end so that write causes a SIGPIPE). The old pipe code | |
114 | is still there and can be conditionally removed by | |
115 | #undef TUI_USE_PIPE_FOR_READLINE. */ | |
116 | ||
117 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ | |
118 | #define TUI_USE_PIPE_FOR_READLINE | |
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. */ | |
132 | static Function *tui_old_rl_getc_function; | |
133 | static VFunction *tui_old_rl_redisplay_function; | |
134 | static VFunction *tui_old_rl_prep_terminal; | |
135 | static VFunction *tui_old_rl_deprep_terminal; | |
136 | static int tui_old_readline_echoing_p; | |
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 | ||
a14ed312 | 150 | static unsigned int _tuiHandleResizeDuringIO (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 | |
a198b876 SC |
170 | w = cmdWin->generic.handle; |
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 | } | |
187 | getyx (w, cmdWin->detail.commandInfo.curLine, | |
188 | cmdWin->detail.commandInfo.curch); | |
d75e970c | 189 | cmdWin->detail.commandInfo.start_line = cmdWin->detail.commandInfo.curLine; |
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 | |
213 | edit buffer is empty, automatically restore the SingleKey mode. */ | |
214 | if (tui_current_key_mode == tui_one_command_mode && rl_end == 0) | |
215 | tui_set_key_mode (tui_single_key_mode); | |
216 | ||
e09d2eba SC |
217 | if (tui_current_key_mode == tui_single_key_mode) |
218 | prompt = ""; | |
219 | else | |
57266a33 | 220 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
221 | |
222 | c_pos = -1; | |
223 | c_line = -1; | |
224 | w = cmdWin->generic.handle; | |
d75e970c | 225 | start_line = cmdWin->detail.commandInfo.start_line; |
a198b876 SC |
226 | wmove (w, start_line, 0); |
227 | prev_col = 0; | |
228 | height = 1; | |
229 | for (in = 0; prompt && prompt[in]; in++) | |
230 | { | |
231 | waddch (w, prompt[in]); | |
232 | getyx (w, line, col); | |
233 | if (col < prev_col) | |
234 | height++; | |
235 | prev_col = col; | |
236 | } | |
237 | for (in = 0; in < rl_end; in++) | |
238 | { | |
239 | unsigned char c; | |
240 | ||
241 | c = (unsigned char) rl_line_buffer[in]; | |
242 | if (in == rl_point) | |
243 | { | |
244 | getyx (w, c_line, c_pos); | |
245 | } | |
246 | ||
247 | if (CTRL_CHAR (c) || c == RUBOUT) | |
248 | { | |
249 | waddch (w, '^'); | |
250 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
251 | } | |
c906108c SS |
252 | else |
253 | { | |
a198b876 | 254 | waddch (w, c); |
c906108c | 255 | } |
a198b876 SC |
256 | if (c == '\n') |
257 | { | |
d75e970c | 258 | getyx (w, cmdWin->detail.commandInfo.start_line, |
a198b876 SC |
259 | cmdWin->detail.commandInfo.curch); |
260 | } | |
261 | getyx (w, line, col); | |
262 | if (col < prev_col) | |
263 | height++; | |
264 | prev_col = col; | |
c906108c | 265 | } |
a198b876 | 266 | wclrtobot (w); |
d75e970c | 267 | getyx (w, cmdWin->detail.commandInfo.start_line, |
a198b876 SC |
268 | cmdWin->detail.commandInfo.curch); |
269 | if (c_line >= 0) | |
d75e970c SC |
270 | { |
271 | wmove (w, c_line, c_pos); | |
272 | cmdWin->detail.commandInfo.curLine = c_line; | |
273 | cmdWin->detail.commandInfo.curch = c_pos; | |
274 | } | |
275 | cmdWin->detail.commandInfo.start_line -= height - 1; | |
a198b876 | 276 | |
a198b876 SC |
277 | wrefresh (w); |
278 | fflush(stdout); | |
279 | } | |
280 | ||
281 | /* Readline callback to prepare the terminal. It is called once | |
57266a33 | 282 | each time we enter readline. Terminal is already setup in curses mode. */ |
a198b876 | 283 | static void |
88fa91b4 | 284 | tui_prep_terminal (int notused1) |
c906108c | 285 | { |
57266a33 SC |
286 | /* Save the prompt registered in readline to correctly display it. |
287 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
288 | rl_prompt because it points to an alloca buffer). */ | |
289 | xfree (tui_rl_saved_prompt); | |
290 | tui_rl_saved_prompt = xstrdup (rl_prompt); | |
a198b876 | 291 | } |
c906108c | 292 | |
a198b876 SC |
293 | /* Readline callback to restore the terminal. It is called once |
294 | each time we leave readline. There is nothing to do in curses mode. */ | |
295 | static void | |
296 | tui_deprep_terminal (void) | |
297 | { | |
298 | } | |
c906108c | 299 | |
8cee930b | 300 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
301 | /* Read readline output pipe and feed the command window with it. |
302 | Should be removed when readline is clean. */ | |
303 | static void | |
304 | tui_readline_output (int code, gdb_client_data data) | |
305 | { | |
306 | int size; | |
307 | char buf[256]; | |
c906108c | 308 | |
a198b876 SC |
309 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
310 | if (size > 0 && tui_active) | |
c906108c | 311 | { |
a198b876 SC |
312 | buf[size] = 0; |
313 | tui_puts (buf); | |
c906108c | 314 | } |
a198b876 | 315 | } |
8cee930b SC |
316 | #endif |
317 | ||
318 | /* Return the portion of PATHNAME that should be output when listing | |
319 | possible completions. If we are hacking filename completion, we | |
320 | are only interested in the basename, the portion following the | |
321 | final slash. Otherwise, we return what we were passed. | |
322 | ||
323 | Comes from readline/complete.c */ | |
324 | static char * | |
325 | printable_part (pathname) | |
326 | char *pathname; | |
327 | { | |
328 | char *temp; | |
329 | ||
330 | temp = rl_filename_completion_desired ? strrchr (pathname, '/') : (char *)NULL; | |
331 | #if defined (__MSDOS__) | |
332 | if (rl_filename_completion_desired && temp == 0 && isalpha (pathname[0]) && pathname[1] == ':') | |
333 | temp = pathname + 1; | |
334 | #endif | |
335 | return (temp ? ++temp : pathname); | |
336 | } | |
337 | ||
338 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we | |
339 | are using it, check for and output a single character for `special' | |
340 | filenames. Return the number of characters we output. */ | |
341 | ||
342 | #define PUTX(c) \ | |
343 | do { \ | |
344 | if (CTRL_CHAR (c)) \ | |
345 | { \ | |
346 | tui_puts ("^"); \ | |
347 | tui_putc (UNCTRL (c)); \ | |
348 | printed_len += 2; \ | |
349 | } \ | |
350 | else if (c == RUBOUT) \ | |
351 | { \ | |
352 | tui_puts ("^?"); \ | |
353 | printed_len += 2; \ | |
354 | } \ | |
355 | else \ | |
356 | { \ | |
357 | tui_putc (c); \ | |
358 | printed_len++; \ | |
359 | } \ | |
360 | } while (0) | |
361 | ||
362 | static int | |
363 | print_filename (to_print, full_pathname) | |
364 | char *to_print, *full_pathname; | |
365 | { | |
366 | int printed_len = 0; | |
367 | char *s; | |
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. | |
377 | Comes from readline/complete.c */ | |
378 | static int | |
379 | get_y_or_n () | |
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 | |
405 | tui_rl_display_match_list (matches, len, max) | |
406 | char **matches; | |
407 | int len, max; | |
408 | { | |
409 | typedef int QSFUNC (const void *, const void *); | |
410 | extern int _rl_qsort_string_compare (const void*, const void*); | |
411 | extern int _rl_print_completions_horizontally; | |
412 | ||
413 | int count, limit, printed_len; | |
414 | int i, j, k, l; | |
415 | char *temp; | |
416 | ||
417 | /* Screen dimension correspond to the TUI command window. */ | |
418 | int screenwidth = cmdWin->generic.width; | |
419 | ||
420 | /* If there are many items, then ask the user if she really wants to | |
421 | see them all. */ | |
422 | if (len >= rl_completion_query_items) | |
423 | { | |
424 | char msg[256]; | |
425 | ||
426 | sprintf (msg, "\nDisplay all %d possibilities? (y or n)", len); | |
427 | tui_puts (msg); | |
428 | if (get_y_or_n () == 0) | |
429 | { | |
430 | tui_puts ("\n"); | |
431 | return; | |
432 | } | |
433 | } | |
434 | ||
435 | /* How many items of MAX length can we fit in the screen window? */ | |
436 | max += 2; | |
437 | limit = screenwidth / max; | |
438 | if (limit != 1 && (limit * max == screenwidth)) | |
439 | limit--; | |
440 | ||
441 | /* Avoid a possible floating exception. If max > screenwidth, | |
442 | limit will be 0 and a divide-by-zero fault will result. */ | |
443 | if (limit == 0) | |
444 | limit = 1; | |
445 | ||
446 | /* How many iterations of the printing loop? */ | |
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. | |
451 | 0 < len <= limit implies count = 1. */ | |
452 | ||
453 | /* Sort the items if they are not already sorted. */ | |
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 | { | |
462 | /* Print the sorted items, up-and-down alphabetically, like ls. */ | |
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 | { | |
485 | /* Print the sorted items, across alphabetically, like ls -x. */ | |
486 | for (i = 1; matches[i]; i++) | |
487 | { | |
488 | temp = printable_part (matches[i]); | |
489 | printed_len = print_filename (temp, matches[i]); | |
490 | /* Have we reached the end of this line? */ | |
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 | { | |
515 | extern int readline_echoing_p; | |
516 | ||
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; | |
525 | tui_old_readline_echoing_p = readline_echoing_p; | |
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; | |
530 | readline_echoing_p = 0; | |
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; | |
539 | tui_old_uiout = uiout; | |
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 */ | |
546 | uiout = tui_out; | |
9d876a16 SC |
547 | |
548 | /* Save tty for SIGCONT. */ | |
549 | savetty (); | |
c906108c | 550 | } |
a198b876 | 551 | else |
c906108c | 552 | { |
a198b876 SC |
553 | /* Restore gdb output. */ |
554 | gdb_stdout = tui_old_stdout; | |
555 | gdb_stderr = tui_old_stderr; | |
556 | gdb_stdlog = gdb_stdout; /* for moment */ | |
557 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
558 | uiout = tui_old_uiout; | |
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; |
a198b876 | 567 | readline_echoing_p = tui_old_readline_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. */ | |
590 | wmove (cmdWin->generic.handle, | |
591 | cmdWin->detail.commandInfo.start_line, | |
592 | cmdWin->detail.commandInfo.curch); | |
593 | wrefresh (cmdWin->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 | |
601 | tui_initialize_io () | |
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 | ||
612 | /* Create the default UI. It is not created because we installed | |
613 | a init_ui_hook. */ | |
2b68e2c5 | 614 | tui_old_uiout = uiout = cli_out_new (gdb_stdout); |
a198b876 | 615 | |
8cee930b | 616 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
617 | /* Temporary solution for readline writing to stdout: |
618 | redirect readline output in a pipe, read that pipe and | |
619 | output the content in the curses command window. */ | |
620 | if (pipe (tui_readline_pipe) != 0) | |
c906108c | 621 | { |
a198b876 SC |
622 | fprintf_unfiltered (gdb_stderr, "Cannot create pipe for readline"); |
623 | exit (1); | |
c906108c | 624 | } |
a198b876 SC |
625 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
626 | if (tui_rl_outstream == 0) | |
c906108c | 627 | { |
a198b876 SC |
628 | fprintf_unfiltered (gdb_stderr, "Cannot redirect readline output"); |
629 | exit (1); | |
c906108c | 630 | } |
0f59c96f | 631 | setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0); |
c906108c | 632 | |
a198b876 SC |
633 | #ifdef O_NONBLOCK |
634 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 635 | #else |
a198b876 SC |
636 | #ifdef O_NDELAY |
637 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 638 | #endif |
a198b876 | 639 | #endif |
a198b876 | 640 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
641 | #else |
642 | tui_rl_outstream = stdout; | |
643 | #endif | |
a198b876 SC |
644 | } |
645 | ||
646 | /* Get a character from the command window. This is called from the readline | |
647 | package. */ | |
648 | int | |
649 | tui_getc (FILE *fp) | |
650 | { | |
651 | int ch; | |
652 | WINDOW *w; | |
653 | ||
654 | w = cmdWin->generic.handle; | |
655 | ||
8cee930b | 656 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
657 | /* Flush readline output. */ |
658 | tui_readline_output (GDB_READABLE, 0); | |
8cee930b SC |
659 | #endif |
660 | ||
a198b876 | 661 | ch = wgetch (w); |
c906108c SS |
662 | ch = _tuiHandleResizeDuringIO (ch); |
663 | ||
a198b876 SC |
664 | /* The \n must be echoed because it will not be printed by readline. */ |
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 | { | |
674 | wmove (w, cmdWin->detail.commandInfo.curLine, 0); | |
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 | { | |
684 | wmove (w, cmdWin->detail.commandInfo.curLine, | |
685 | cmdWin->detail.commandInfo.curch); | |
686 | waddch (w, ch); | |
687 | } | |
688 | } | |
689 | ||
bcdf1568 | 690 | if (key_is_command_char (ch)) |
c906108c | 691 | { /* Handle prev/next/up/down here */ |
b0a30fce | 692 | ch = tui_dispatch_ctrl_char (ch); |
c906108c | 693 | } |
a198b876 | 694 | |
c906108c SS |
695 | if (ch == '\n' || ch == '\r' || ch == '\f') |
696 | cmdWin->detail.commandInfo.curch = 0; | |
a198b876 | 697 | #if 0 |
c906108c SS |
698 | else |
699 | tuiIncrCommandCharCountBy (1); | |
a198b876 SC |
700 | #endif |
701 | if (ch == KEY_BACKSPACE) | |
702 | return '\b'; | |
703 | ||
c906108c | 704 | return ch; |
a198b876 | 705 | } |
c906108c | 706 | |
c906108c | 707 | |
a198b876 SC |
708 | /* Cleanup when a resize has occured. |
709 | Returns the character that must be processed. */ | |
c906108c | 710 | static unsigned int |
eca6576c | 711 | _tuiHandleResizeDuringIO (unsigned int originalCh) |
c906108c | 712 | { |
dd1abb8c | 713 | if (tui_win_resized ()) |
c906108c | 714 | { |
a21fcd8f | 715 | tui_refresh_all_win (); |
c906108c | 716 | dont_repeat (); |
dd1abb8c | 717 | tui_set_win_resized_to (FALSE); |
c906108c SS |
718 | return '\n'; |
719 | } | |
720 | else | |
721 | return originalCh; | |
a198b876 | 722 | } |