Commit | Line | Data |
---|---|---|
f377b406 | 1 | /* TUI support I/O functions. |
f33c6cbf | 2 | |
96ec9981 | 3 | Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, |
f33c6cbf AC |
4 | Inc. |
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" | |
c906108c SS |
33 | #include "tui.h" |
34 | #include "tuiData.h" | |
35 | #include "tuiIO.h" | |
36 | #include "tuiCommand.h" | |
37 | #include "tuiWin.h" | |
a198b876 SC |
38 | #include "tuiGeneralWin.h" |
39 | #include "tui-file.h" | |
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 | |
ec6f8892 SC |
54 | /* Use definition from readline 4.3. */ |
55 | #undef CTRL_CHAR | |
56 | #define CTRL_CHAR(c) ((c) < control_character_threshold && (((c) & 0x80) == 0)) | |
57 | ||
a198b876 SC |
58 | /* This file controls the IO interactions between gdb and curses. |
59 | When the TUI is enabled, gdb has two modes a curses and a standard | |
60 | mode. | |
61 | ||
62 | In curses mode, the gdb outputs are made in a curses command window. | |
63 | For this, the gdb_stdout and gdb_stderr are redirected to the specific | |
64 | ui_file implemented by TUI. The output is handled by tui_puts(). | |
65 | The input is also controlled by curses with tui_getc(). The readline | |
66 | library uses this function to get its input. Several readline hooks | |
67 | are installed to redirect readline output to the TUI (see also the | |
68 | note below). | |
69 | ||
70 | In normal mode, the gdb outputs are restored to their origin, that | |
71 | is as if TUI is not used. Readline also uses its original getc() | |
72 | function with stdin. | |
73 | ||
8cee930b SC |
74 | Note SCz/2001-07-21: the current readline is not clean in its management of |
75 | the output. Even if we install a redisplay handler, it sometimes writes on | |
76 | a stdout file. It is important to redirect every output produced by | |
77 | readline, otherwise the curses window will be garbled. This is implemented | |
78 | with a pipe that TUI reads and readline writes to. A gdb input handler | |
a198b876 SC |
79 | is created so that reading the pipe is handled automatically. |
80 | This will probably not work on non-Unix platforms. The best fix is | |
8cee930b SC |
81 | to make readline clean enougth so that is never write on stdout. |
82 | ||
83 | Note SCz/2002-09-01: we now use more readline hooks and it seems that | |
84 | with them we don't need the pipe anymore (verified by creating the pipe | |
85 | and closing its end so that write causes a SIGPIPE). The old pipe code | |
86 | is still there and can be conditionally removed by | |
87 | #undef TUI_USE_PIPE_FOR_READLINE. */ | |
88 | ||
89 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ | |
90 | #define TUI_USE_PIPE_FOR_READLINE | |
91 | /*#undef TUI_USE_PIPE_FOR_READLINE*/ | |
a198b876 SC |
92 | |
93 | /* TUI output files. */ | |
94 | static struct ui_file *tui_stdout; | |
95 | static struct ui_file *tui_stderr; | |
2b68e2c5 | 96 | struct ui_out *tui_out; |
a198b876 SC |
97 | |
98 | /* GDB output files in non-curses mode. */ | |
99 | static struct ui_file *tui_old_stdout; | |
100 | static struct ui_file *tui_old_stderr; | |
2b68e2c5 | 101 | struct ui_out *tui_old_uiout; |
a198b876 SC |
102 | |
103 | /* Readline previous hooks. */ | |
104 | static Function *tui_old_rl_getc_function; | |
105 | static VFunction *tui_old_rl_redisplay_function; | |
106 | static VFunction *tui_old_rl_prep_terminal; | |
107 | static VFunction *tui_old_rl_deprep_terminal; | |
108 | static int tui_old_readline_echoing_p; | |
109 | ||
110 | /* Readline output stream. | |
111 | Should be removed when readline is clean. */ | |
112 | static FILE *tui_rl_outstream; | |
113 | static FILE *tui_old_rl_outstream; | |
8cee930b | 114 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 115 | static int tui_readline_pipe[2]; |
8cee930b | 116 | #endif |
c906108c | 117 | |
57266a33 SC |
118 | /* The last gdb prompt that was registered in readline. |
119 | This may be the main gdb prompt or a secondary prompt. */ | |
120 | static char *tui_rl_saved_prompt; | |
121 | ||
a14ed312 | 122 | static unsigned int _tuiHandleResizeDuringIO (unsigned int); |
c906108c | 123 | |
8cee930b SC |
124 | static void |
125 | tui_putc (char c) | |
126 | { | |
127 | char buf[2]; | |
128 | ||
129 | buf[0] = c; | |
130 | buf[1] = 0; | |
131 | tui_puts (buf); | |
132 | } | |
c906108c | 133 | |
a198b876 | 134 | /* Print the string in the curses command window. */ |
c906108c | 135 | void |
a198b876 | 136 | tui_puts (const char *string) |
c906108c | 137 | { |
a198b876 SC |
138 | static int tui_skip_line = -1; |
139 | char c; | |
140 | WINDOW *w; | |
c906108c | 141 | |
a198b876 SC |
142 | w = cmdWin->generic.handle; |
143 | while ((c = *string++) != 0) | |
c906108c | 144 | { |
a198b876 SC |
145 | /* Catch annotation and discard them. We need two \032 and |
146 | discard until a \n is seen. */ | |
147 | if (c == '\032') | |
148 | { | |
149 | tui_skip_line++; | |
150 | } | |
151 | else if (tui_skip_line != 1) | |
152 | { | |
153 | tui_skip_line = -1; | |
154 | waddch (w, c); | |
155 | } | |
156 | else if (c == '\n') | |
157 | tui_skip_line = -1; | |
158 | } | |
159 | getyx (w, cmdWin->detail.commandInfo.curLine, | |
160 | cmdWin->detail.commandInfo.curch); | |
d75e970c | 161 | cmdWin->detail.commandInfo.start_line = cmdWin->detail.commandInfo.curLine; |
a198b876 SC |
162 | |
163 | /* We could defer the following. */ | |
164 | wrefresh (w); | |
165 | fflush (stdout); | |
166 | } | |
167 | ||
168 | /* Readline callback. | |
169 | Redisplay the command line with its prompt after readline has | |
170 | changed the edited text. */ | |
e09d2eba | 171 | void |
a198b876 SC |
172 | tui_redisplay_readline (void) |
173 | { | |
174 | int prev_col; | |
175 | int height; | |
176 | int col, line; | |
177 | int c_pos; | |
178 | int c_line; | |
179 | int in; | |
180 | WINDOW *w; | |
181 | char *prompt; | |
182 | int start_line; | |
e3da6fc5 SC |
183 | |
184 | /* Detect when we temporarily left SingleKey and now the readline | |
185 | edit buffer is empty, automatically restore the SingleKey mode. */ | |
186 | if (tui_current_key_mode == tui_one_command_mode && rl_end == 0) | |
187 | tui_set_key_mode (tui_single_key_mode); | |
188 | ||
e09d2eba SC |
189 | if (tui_current_key_mode == tui_single_key_mode) |
190 | prompt = ""; | |
191 | else | |
57266a33 | 192 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
193 | |
194 | c_pos = -1; | |
195 | c_line = -1; | |
196 | w = cmdWin->generic.handle; | |
d75e970c | 197 | start_line = cmdWin->detail.commandInfo.start_line; |
a198b876 SC |
198 | wmove (w, start_line, 0); |
199 | prev_col = 0; | |
200 | height = 1; | |
201 | for (in = 0; prompt && prompt[in]; in++) | |
202 | { | |
203 | waddch (w, prompt[in]); | |
204 | getyx (w, line, col); | |
205 | if (col < prev_col) | |
206 | height++; | |
207 | prev_col = col; | |
208 | } | |
209 | for (in = 0; in < rl_end; in++) | |
210 | { | |
211 | unsigned char c; | |
212 | ||
213 | c = (unsigned char) rl_line_buffer[in]; | |
214 | if (in == rl_point) | |
215 | { | |
216 | getyx (w, c_line, c_pos); | |
217 | } | |
218 | ||
219 | if (CTRL_CHAR (c) || c == RUBOUT) | |
220 | { | |
221 | waddch (w, '^'); | |
222 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
223 | } | |
c906108c SS |
224 | else |
225 | { | |
a198b876 | 226 | waddch (w, c); |
c906108c | 227 | } |
a198b876 SC |
228 | if (c == '\n') |
229 | { | |
d75e970c | 230 | getyx (w, cmdWin->detail.commandInfo.start_line, |
a198b876 SC |
231 | cmdWin->detail.commandInfo.curch); |
232 | } | |
233 | getyx (w, line, col); | |
234 | if (col < prev_col) | |
235 | height++; | |
236 | prev_col = col; | |
c906108c | 237 | } |
a198b876 | 238 | wclrtobot (w); |
d75e970c | 239 | getyx (w, cmdWin->detail.commandInfo.start_line, |
a198b876 SC |
240 | cmdWin->detail.commandInfo.curch); |
241 | if (c_line >= 0) | |
d75e970c SC |
242 | { |
243 | wmove (w, c_line, c_pos); | |
244 | cmdWin->detail.commandInfo.curLine = c_line; | |
245 | cmdWin->detail.commandInfo.curch = c_pos; | |
246 | } | |
247 | cmdWin->detail.commandInfo.start_line -= height - 1; | |
a198b876 | 248 | |
a198b876 SC |
249 | wrefresh (w); |
250 | fflush(stdout); | |
251 | } | |
252 | ||
253 | /* Readline callback to prepare the terminal. It is called once | |
57266a33 | 254 | each time we enter readline. Terminal is already setup in curses mode. */ |
a198b876 | 255 | static void |
88fa91b4 | 256 | tui_prep_terminal (int notused1) |
c906108c | 257 | { |
57266a33 SC |
258 | /* Save the prompt registered in readline to correctly display it. |
259 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
260 | rl_prompt because it points to an alloca buffer). */ | |
261 | xfree (tui_rl_saved_prompt); | |
262 | tui_rl_saved_prompt = xstrdup (rl_prompt); | |
a198b876 | 263 | } |
c906108c | 264 | |
a198b876 SC |
265 | /* Readline callback to restore the terminal. It is called once |
266 | each time we leave readline. There is nothing to do in curses mode. */ | |
267 | static void | |
268 | tui_deprep_terminal (void) | |
269 | { | |
270 | } | |
c906108c | 271 | |
8cee930b | 272 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
273 | /* Read readline output pipe and feed the command window with it. |
274 | Should be removed when readline is clean. */ | |
275 | static void | |
276 | tui_readline_output (int code, gdb_client_data data) | |
277 | { | |
278 | int size; | |
279 | char buf[256]; | |
c906108c | 280 | |
a198b876 SC |
281 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
282 | if (size > 0 && tui_active) | |
c906108c | 283 | { |
a198b876 SC |
284 | buf[size] = 0; |
285 | tui_puts (buf); | |
c906108c | 286 | } |
a198b876 | 287 | } |
8cee930b SC |
288 | #endif |
289 | ||
290 | /* Return the portion of PATHNAME that should be output when listing | |
291 | possible completions. If we are hacking filename completion, we | |
292 | are only interested in the basename, the portion following the | |
293 | final slash. Otherwise, we return what we were passed. | |
294 | ||
295 | Comes from readline/complete.c */ | |
296 | static char * | |
297 | printable_part (pathname) | |
298 | char *pathname; | |
299 | { | |
300 | char *temp; | |
301 | ||
302 | temp = rl_filename_completion_desired ? strrchr (pathname, '/') : (char *)NULL; | |
303 | #if defined (__MSDOS__) | |
304 | if (rl_filename_completion_desired && temp == 0 && isalpha (pathname[0]) && pathname[1] == ':') | |
305 | temp = pathname + 1; | |
306 | #endif | |
307 | return (temp ? ++temp : pathname); | |
308 | } | |
309 | ||
310 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we | |
311 | are using it, check for and output a single character for `special' | |
312 | filenames. Return the number of characters we output. */ | |
313 | ||
314 | #define PUTX(c) \ | |
315 | do { \ | |
316 | if (CTRL_CHAR (c)) \ | |
317 | { \ | |
318 | tui_puts ("^"); \ | |
319 | tui_putc (UNCTRL (c)); \ | |
320 | printed_len += 2; \ | |
321 | } \ | |
322 | else if (c == RUBOUT) \ | |
323 | { \ | |
324 | tui_puts ("^?"); \ | |
325 | printed_len += 2; \ | |
326 | } \ | |
327 | else \ | |
328 | { \ | |
329 | tui_putc (c); \ | |
330 | printed_len++; \ | |
331 | } \ | |
332 | } while (0) | |
333 | ||
334 | static int | |
335 | print_filename (to_print, full_pathname) | |
336 | char *to_print, *full_pathname; | |
337 | { | |
338 | int printed_len = 0; | |
339 | char *s; | |
340 | ||
341 | for (s = to_print; *s; s++) | |
342 | { | |
343 | PUTX (*s); | |
344 | } | |
345 | return printed_len; | |
346 | } | |
347 | ||
348 | /* The user must press "y" or "n". Non-zero return means "y" pressed. | |
349 | Comes from readline/complete.c */ | |
350 | static int | |
351 | get_y_or_n () | |
352 | { | |
353 | extern int _rl_abort_internal (); | |
354 | int c; | |
355 | ||
356 | for (;;) | |
357 | { | |
358 | c = rl_read_key (); | |
359 | if (c == 'y' || c == 'Y' || c == ' ') | |
360 | return (1); | |
361 | if (c == 'n' || c == 'N' || c == RUBOUT) | |
362 | return (0); | |
363 | if (c == ABORT_CHAR) | |
364 | _rl_abort_internal (); | |
365 | beep (); | |
366 | } | |
367 | } | |
368 | ||
369 | /* A convenience function for displaying a list of strings in | |
370 | columnar format on readline's output stream. MATCHES is the list | |
371 | of strings, in argv format, LEN is the number of strings in MATCHES, | |
372 | and MAX is the length of the longest string in MATCHES. | |
373 | ||
374 | Comes from readline/complete.c and modified to write in | |
375 | the TUI command window using tui_putc/tui_puts. */ | |
376 | static void | |
377 | tui_rl_display_match_list (matches, len, max) | |
378 | char **matches; | |
379 | int len, max; | |
380 | { | |
381 | typedef int QSFUNC (const void *, const void *); | |
382 | extern int _rl_qsort_string_compare (const void*, const void*); | |
383 | extern int _rl_print_completions_horizontally; | |
384 | ||
385 | int count, limit, printed_len; | |
386 | int i, j, k, l; | |
387 | char *temp; | |
388 | ||
389 | /* Screen dimension correspond to the TUI command window. */ | |
390 | int screenwidth = cmdWin->generic.width; | |
391 | ||
392 | /* If there are many items, then ask the user if she really wants to | |
393 | see them all. */ | |
394 | if (len >= rl_completion_query_items) | |
395 | { | |
396 | char msg[256]; | |
397 | ||
398 | sprintf (msg, "\nDisplay all %d possibilities? (y or n)", len); | |
399 | tui_puts (msg); | |
400 | if (get_y_or_n () == 0) | |
401 | { | |
402 | tui_puts ("\n"); | |
403 | return; | |
404 | } | |
405 | } | |
406 | ||
407 | /* How many items of MAX length can we fit in the screen window? */ | |
408 | max += 2; | |
409 | limit = screenwidth / max; | |
410 | if (limit != 1 && (limit * max == screenwidth)) | |
411 | limit--; | |
412 | ||
413 | /* Avoid a possible floating exception. If max > screenwidth, | |
414 | limit will be 0 and a divide-by-zero fault will result. */ | |
415 | if (limit == 0) | |
416 | limit = 1; | |
417 | ||
418 | /* How many iterations of the printing loop? */ | |
419 | count = (len + (limit - 1)) / limit; | |
420 | ||
421 | /* Watch out for special case. If LEN is less than LIMIT, then | |
422 | just do the inner printing loop. | |
423 | 0 < len <= limit implies count = 1. */ | |
424 | ||
425 | /* Sort the items if they are not already sorted. */ | |
426 | if (rl_ignore_completion_duplicates == 0) | |
427 | qsort (matches + 1, len, sizeof (char *), | |
428 | (QSFUNC *)_rl_qsort_string_compare); | |
429 | ||
430 | tui_putc ('\n'); | |
431 | ||
432 | if (_rl_print_completions_horizontally == 0) | |
433 | { | |
434 | /* Print the sorted items, up-and-down alphabetically, like ls. */ | |
435 | for (i = 1; i <= count; i++) | |
436 | { | |
437 | for (j = 0, l = i; j < limit; j++) | |
438 | { | |
439 | if (l > len || matches[l] == 0) | |
440 | break; | |
441 | else | |
442 | { | |
443 | temp = printable_part (matches[l]); | |
444 | printed_len = print_filename (temp, matches[l]); | |
445 | ||
446 | if (j + 1 < limit) | |
447 | for (k = 0; k < max - printed_len; k++) | |
448 | tui_putc (' '); | |
449 | } | |
450 | l += count; | |
451 | } | |
452 | tui_putc ('\n'); | |
453 | } | |
454 | } | |
455 | else | |
456 | { | |
457 | /* Print the sorted items, across alphabetically, like ls -x. */ | |
458 | for (i = 1; matches[i]; i++) | |
459 | { | |
460 | temp = printable_part (matches[i]); | |
461 | printed_len = print_filename (temp, matches[i]); | |
462 | /* Have we reached the end of this line? */ | |
463 | if (matches[i+1]) | |
464 | { | |
465 | if (i && (limit > 1) && (i % limit) == 0) | |
466 | tui_putc ('\n'); | |
467 | else | |
468 | for (k = 0; k < max - printed_len; k++) | |
469 | tui_putc (' '); | |
470 | } | |
471 | } | |
472 | tui_putc ('\n'); | |
473 | } | |
474 | } | |
a198b876 SC |
475 | |
476 | /* Setup the IO for curses or non-curses mode. | |
477 | - In non-curses mode, readline and gdb use the standard input and | |
478 | standard output/error directly. | |
479 | - In curses mode, the standard output/error is controlled by TUI | |
480 | with the tui_stdout and tui_stderr. The output is redirected in | |
481 | the curses command window. Several readline callbacks are installed | |
482 | so that readline asks for its input to the curses command window | |
483 | with wgetch(). */ | |
484 | void | |
485 | tui_setup_io (int mode) | |
486 | { | |
487 | extern int readline_echoing_p; | |
488 | ||
489 | if (mode) | |
c906108c | 490 | { |
a198b876 SC |
491 | /* Redirect readline to TUI. */ |
492 | tui_old_rl_redisplay_function = rl_redisplay_function; | |
493 | tui_old_rl_deprep_terminal = rl_deprep_term_function; | |
494 | tui_old_rl_prep_terminal = rl_prep_term_function; | |
495 | tui_old_rl_getc_function = rl_getc_function; | |
496 | tui_old_rl_outstream = rl_outstream; | |
497 | tui_old_readline_echoing_p = readline_echoing_p; | |
498 | rl_redisplay_function = tui_redisplay_readline; | |
499 | rl_deprep_term_function = tui_deprep_terminal; | |
500 | rl_prep_term_function = tui_prep_terminal; | |
501 | rl_getc_function = tui_getc; | |
502 | readline_echoing_p = 0; | |
503 | rl_outstream = tui_rl_outstream; | |
504 | rl_prompt = 0; | |
8cee930b SC |
505 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
506 | rl_already_prompted = 0; | |
a198b876 SC |
507 | |
508 | /* Keep track of previous gdb output. */ | |
509 | tui_old_stdout = gdb_stdout; | |
510 | tui_old_stderr = gdb_stderr; | |
511 | tui_old_uiout = uiout; | |
512 | ||
513 | /* Reconfigure gdb output. */ | |
514 | gdb_stdout = tui_stdout; | |
515 | gdb_stderr = tui_stderr; | |
516 | gdb_stdlog = gdb_stdout; /* for moment */ | |
517 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
518 | uiout = tui_out; | |
9d876a16 SC |
519 | |
520 | /* Save tty for SIGCONT. */ | |
521 | savetty (); | |
c906108c | 522 | } |
a198b876 | 523 | else |
c906108c | 524 | { |
a198b876 SC |
525 | /* Restore gdb output. */ |
526 | gdb_stdout = tui_old_stdout; | |
527 | gdb_stderr = tui_old_stderr; | |
528 | gdb_stdlog = gdb_stdout; /* for moment */ | |
529 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
530 | uiout = tui_old_uiout; | |
531 | ||
532 | /* Restore readline. */ | |
533 | rl_redisplay_function = tui_old_rl_redisplay_function; | |
534 | rl_deprep_term_function = tui_old_rl_deprep_terminal; | |
535 | rl_prep_term_function = tui_old_rl_prep_terminal; | |
536 | rl_getc_function = tui_old_rl_getc_function; | |
537 | rl_outstream = tui_old_rl_outstream; | |
8cee930b | 538 | rl_completion_display_matches_hook = 0; |
a198b876 | 539 | readline_echoing_p = tui_old_readline_echoing_p; |
bd9b0abf | 540 | rl_already_prompted = 0; |
9d876a16 SC |
541 | |
542 | /* Save tty for SIGCONT. */ | |
543 | savetty (); | |
544 | } | |
545 | } | |
546 | ||
547 | #ifdef SIGCONT | |
548 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ | |
549 | static void | |
550 | tui_cont_sig (int sig) | |
551 | { | |
552 | if (tui_active) | |
553 | { | |
554 | /* Restore the terminal setting because another process (shell) | |
555 | might have changed it. */ | |
556 | resetty (); | |
557 | ||
558 | /* Force a refresh of the screen. */ | |
559 | tuiRefreshAll (); | |
d75e970c SC |
560 | |
561 | /* Update cursor position on the screen. */ | |
562 | wmove (cmdWin->generic.handle, | |
563 | cmdWin->detail.commandInfo.start_line, | |
564 | cmdWin->detail.commandInfo.curch); | |
565 | wrefresh (cmdWin->generic.handle); | |
c906108c | 566 | } |
9d876a16 | 567 | signal (sig, tui_cont_sig); |
a198b876 | 568 | } |
9d876a16 | 569 | #endif |
c906108c | 570 | |
a198b876 SC |
571 | /* Initialize the IO for gdb in curses mode. */ |
572 | void | |
573 | tui_initialize_io () | |
574 | { | |
9d876a16 SC |
575 | #ifdef SIGCONT |
576 | signal (SIGCONT, tui_cont_sig); | |
577 | #endif | |
578 | ||
a198b876 SC |
579 | /* Create tui output streams. */ |
580 | tui_stdout = tui_fileopen (stdout); | |
581 | tui_stderr = tui_fileopen (stderr); | |
582 | tui_out = tui_out_new (tui_stdout); | |
583 | ||
584 | /* Create the default UI. It is not created because we installed | |
585 | a init_ui_hook. */ | |
2b68e2c5 | 586 | tui_old_uiout = uiout = cli_out_new (gdb_stdout); |
a198b876 | 587 | |
8cee930b | 588 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
589 | /* Temporary solution for readline writing to stdout: |
590 | redirect readline output in a pipe, read that pipe and | |
591 | output the content in the curses command window. */ | |
592 | if (pipe (tui_readline_pipe) != 0) | |
c906108c | 593 | { |
a198b876 SC |
594 | fprintf_unfiltered (gdb_stderr, "Cannot create pipe for readline"); |
595 | exit (1); | |
c906108c | 596 | } |
a198b876 SC |
597 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
598 | if (tui_rl_outstream == 0) | |
c906108c | 599 | { |
a198b876 SC |
600 | fprintf_unfiltered (gdb_stderr, "Cannot redirect readline output"); |
601 | exit (1); | |
c906108c | 602 | } |
0f59c96f | 603 | setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0); |
c906108c | 604 | |
a198b876 SC |
605 | #ifdef O_NONBLOCK |
606 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 607 | #else |
a198b876 SC |
608 | #ifdef O_NDELAY |
609 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 610 | #endif |
a198b876 | 611 | #endif |
a198b876 | 612 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
613 | #else |
614 | tui_rl_outstream = stdout; | |
615 | #endif | |
a198b876 SC |
616 | } |
617 | ||
618 | /* Get a character from the command window. This is called from the readline | |
619 | package. */ | |
620 | int | |
621 | tui_getc (FILE *fp) | |
622 | { | |
623 | int ch; | |
624 | WINDOW *w; | |
625 | ||
626 | w = cmdWin->generic.handle; | |
627 | ||
8cee930b | 628 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
629 | /* Flush readline output. */ |
630 | tui_readline_output (GDB_READABLE, 0); | |
8cee930b SC |
631 | #endif |
632 | ||
a198b876 | 633 | ch = wgetch (w); |
c906108c SS |
634 | ch = _tuiHandleResizeDuringIO (ch); |
635 | ||
a198b876 SC |
636 | /* The \n must be echoed because it will not be printed by readline. */ |
637 | if (ch == '\n') | |
638 | { | |
639 | /* When hitting return with an empty input, gdb executes the last | |
640 | command. If we emit a newline, this fills up the command window | |
641 | with empty lines with gdb prompt at beginning. Instead of that, | |
642 | stay on the same line but provide a visual effect to show the | |
643 | user we recognized the command. */ | |
644 | if (rl_end == 0) | |
645 | { | |
646 | wmove (w, cmdWin->detail.commandInfo.curLine, 0); | |
647 | ||
648 | /* Clear the line. This will blink the gdb prompt since | |
649 | it will be redrawn at the same line. */ | |
650 | wclrtoeol (w); | |
651 | wrefresh (w); | |
652 | napms (20); | |
653 | } | |
654 | else | |
655 | { | |
656 | wmove (w, cmdWin->detail.commandInfo.curLine, | |
657 | cmdWin->detail.commandInfo.curch); | |
658 | waddch (w, ch); | |
659 | } | |
660 | } | |
661 | ||
c906108c SS |
662 | if (m_isCommandChar (ch)) |
663 | { /* Handle prev/next/up/down here */ | |
c906108c | 664 | ch = tuiDispatchCtrlChar (ch); |
c906108c | 665 | } |
a198b876 | 666 | |
c906108c SS |
667 | if (ch == '\n' || ch == '\r' || ch == '\f') |
668 | cmdWin->detail.commandInfo.curch = 0; | |
a198b876 | 669 | #if 0 |
c906108c SS |
670 | else |
671 | tuiIncrCommandCharCountBy (1); | |
a198b876 SC |
672 | #endif |
673 | if (ch == KEY_BACKSPACE) | |
674 | return '\b'; | |
675 | ||
c906108c | 676 | return ch; |
a198b876 | 677 | } |
c906108c | 678 | |
c906108c | 679 | |
a198b876 SC |
680 | /* Cleanup when a resize has occured. |
681 | Returns the character that must be processed. */ | |
c906108c | 682 | static unsigned int |
eca6576c | 683 | _tuiHandleResizeDuringIO (unsigned int originalCh) |
c906108c SS |
684 | { |
685 | if (tuiWinResized ()) | |
686 | { | |
e8b915dc | 687 | tuiRefreshAll (); |
c906108c SS |
688 | dont_repeat (); |
689 | tuiSetWinResizedTo (FALSE); | |
c906108c SS |
690 | return '\n'; |
691 | } | |
692 | else | |
693 | return originalCh; | |
a198b876 | 694 | } |