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" |
82083d6d | 40 | #include "completer.h" |
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 | ||
ec6f8892 SC |
66 | /* Use definition from readline 4.3. */ |
67 | #undef CTRL_CHAR | |
08ef48c5 MS |
68 | #define CTRL_CHAR(c) \ |
69 | ((c) < control_character_threshold && (((c) & 0x80) == 0)) | |
ec6f8892 | 70 | |
a198b876 SC |
71 | /* This file controls the IO interactions between gdb and curses. |
72 | When the TUI is enabled, gdb has two modes a curses and a standard | |
73 | mode. | |
74 | ||
1cc6d956 MS |
75 | In curses mode, the gdb outputs are made in a curses command |
76 | window. For this, the gdb_stdout and gdb_stderr are redirected to | |
77 | the specific ui_file implemented by TUI. The output is handled by | |
78 | tui_puts(). The input is also controlled by curses with | |
79 | tui_getc(). The readline library uses this function to get its | |
80 | input. Several readline hooks are installed to redirect readline | |
81 | output to the TUI (see also the note below). | |
a198b876 SC |
82 | |
83 | In normal mode, the gdb outputs are restored to their origin, that | |
84 | is as if TUI is not used. Readline also uses its original getc() | |
85 | function with stdin. | |
86 | ||
1cc6d956 MS |
87 | Note SCz/2001-07-21: the current readline is not clean in its |
88 | management of the output. Even if we install a redisplay handler, | |
89 | it sometimes writes on a stdout file. It is important to redirect | |
90 | every output produced by readline, otherwise the curses window will | |
91 | be garbled. This is implemented with a pipe that TUI reads and | |
92 | readline writes to. A gdb input handler is created so that reading | |
93 | the pipe is handled automatically. This will probably not work on | |
94 | non-Unix platforms. The best fix is to make readline clean enougth | |
95 | so that is never write on stdout. | |
96 | ||
97 | Note SCz/2002-09-01: we now use more readline hooks and it seems | |
98 | that with them we don't need the pipe anymore (verified by creating | |
99 | the pipe and closing its end so that write causes a SIGPIPE). The | |
100 | old pipe code is still there and can be conditionally removed by | |
8cee930b SC |
101 | #undef TUI_USE_PIPE_FOR_READLINE. */ |
102 | ||
103 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ | |
a156a290 | 104 | #ifdef HAVE_PIPE |
8cee930b | 105 | #define TUI_USE_PIPE_FOR_READLINE |
a156a290 | 106 | #endif |
1cc6d956 | 107 | /* #undef TUI_USE_PIPE_FOR_READLINE */ |
a198b876 SC |
108 | |
109 | /* TUI output files. */ | |
110 | static struct ui_file *tui_stdout; | |
111 | static struct ui_file *tui_stderr; | |
2b68e2c5 | 112 | struct ui_out *tui_out; |
a198b876 SC |
113 | |
114 | /* GDB output files in non-curses mode. */ | |
115 | static struct ui_file *tui_old_stdout; | |
116 | static struct ui_file *tui_old_stderr; | |
2b68e2c5 | 117 | struct ui_out *tui_old_uiout; |
a198b876 SC |
118 | |
119 | /* Readline previous hooks. */ | |
840ed64d JK |
120 | static rl_getc_func_t *tui_old_rl_getc_function; |
121 | static rl_voidfunc_t *tui_old_rl_redisplay_function; | |
122 | static rl_vintfunc_t *tui_old_rl_prep_terminal; | |
123 | static rl_voidfunc_t *tui_old_rl_deprep_terminal; | |
ef0b411a | 124 | static rl_compdisp_func_t *tui_old_rl_display_matches_hook; |
cc88a640 | 125 | static int tui_old_rl_echoing_p; |
a198b876 SC |
126 | |
127 | /* Readline output stream. | |
128 | Should be removed when readline is clean. */ | |
129 | static FILE *tui_rl_outstream; | |
130 | static FILE *tui_old_rl_outstream; | |
8cee930b | 131 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 132 | static int tui_readline_pipe[2]; |
8cee930b | 133 | #endif |
c906108c | 134 | |
57266a33 SC |
135 | /* The last gdb prompt that was registered in readline. |
136 | This may be the main gdb prompt or a secondary prompt. */ | |
137 | static char *tui_rl_saved_prompt; | |
138 | ||
8cee930b SC |
139 | static void |
140 | tui_putc (char c) | |
141 | { | |
142 | char buf[2]; | |
143 | ||
144 | buf[0] = c; | |
145 | buf[1] = 0; | |
146 | tui_puts (buf); | |
147 | } | |
c906108c | 148 | |
518be979 DE |
149 | /* Print the string in the curses command window. |
150 | The output is buffered. It is up to the caller to refresh the screen | |
151 | if necessary. */ | |
152 | ||
c906108c | 153 | void |
a198b876 | 154 | tui_puts (const char *string) |
c906108c | 155 | { |
a198b876 SC |
156 | static int tui_skip_line = -1; |
157 | char c; | |
158 | WINDOW *w; | |
c906108c | 159 | |
6d012f14 | 160 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 161 | while ((c = *string++) != 0) |
c906108c | 162 | { |
a198b876 SC |
163 | /* Catch annotation and discard them. We need two \032 and |
164 | discard until a \n is seen. */ | |
165 | if (c == '\032') | |
166 | { | |
167 | tui_skip_line++; | |
168 | } | |
169 | else if (tui_skip_line != 1) | |
170 | { | |
171 | tui_skip_line = -1; | |
312809f8 EZ |
172 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ |
173 | if (c == '\t') | |
174 | { | |
175 | int line, col; | |
176 | ||
177 | getyx (w, line, col); | |
178 | do | |
179 | { | |
180 | waddch (w, ' '); | |
181 | col++; | |
182 | } while ((col % 8) != 0); | |
183 | } | |
184 | else | |
185 | waddch (w, c); | |
a198b876 SC |
186 | } |
187 | else if (c == '\n') | |
188 | tui_skip_line = -1; | |
189 | } | |
6f1cb6ea | 190 | TUI_CMD_WIN->detail.command_info.start_line = getcury (w); |
a198b876 SC |
191 | } |
192 | ||
193 | /* Readline callback. | |
194 | Redisplay the command line with its prompt after readline has | |
195 | changed the edited text. */ | |
e09d2eba | 196 | void |
a198b876 SC |
197 | tui_redisplay_readline (void) |
198 | { | |
199 | int prev_col; | |
200 | int height; | |
201 | int col, line; | |
202 | int c_pos; | |
203 | int c_line; | |
204 | int in; | |
205 | WINDOW *w; | |
e6a959d6 | 206 | const char *prompt; |
a198b876 | 207 | int start_line; |
e3da6fc5 SC |
208 | |
209 | /* Detect when we temporarily left SingleKey and now the readline | |
1cc6d956 | 210 | edit buffer is empty, automatically restore the SingleKey |
9b8d6827 SC |
211 | mode. The restore must only be done if the command has finished. |
212 | The command could call prompt_for_continue and we must not | |
213 | restore SingleKey so that the prompt and normal keymap are used. */ | |
214 | if (tui_current_key_mode == TUI_ONE_COMMAND_MODE && rl_end == 0 | |
215 | && immediate_quit == 0) | |
6d012f14 | 216 | tui_set_key_mode (TUI_SINGLE_KEY_MODE); |
e3da6fc5 | 217 | |
6d012f14 | 218 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
e09d2eba SC |
219 | prompt = ""; |
220 | else | |
57266a33 | 221 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
222 | |
223 | c_pos = -1; | |
224 | c_line = -1; | |
6d012f14 AC |
225 | w = TUI_CMD_WIN->generic.handle; |
226 | start_line = TUI_CMD_WIN->detail.command_info.start_line; | |
a198b876 SC |
227 | wmove (w, start_line, 0); |
228 | prev_col = 0; | |
229 | height = 1; | |
230 | for (in = 0; prompt && prompt[in]; in++) | |
231 | { | |
232 | waddch (w, prompt[in]); | |
233 | getyx (w, line, col); | |
588dcc3e | 234 | if (col <= prev_col) |
a198b876 SC |
235 | height++; |
236 | prev_col = col; | |
237 | } | |
588dcc3e | 238 | for (in = 0; in <= rl_end; in++) |
a198b876 SC |
239 | { |
240 | unsigned char c; | |
241 | ||
a198b876 SC |
242 | if (in == rl_point) |
243 | { | |
244 | getyx (w, c_line, c_pos); | |
245 | } | |
246 | ||
588dcc3e PP |
247 | if (in == rl_end) |
248 | break; | |
249 | ||
250 | c = (unsigned char) rl_line_buffer[in]; | |
a198b876 SC |
251 | if (CTRL_CHAR (c) || c == RUBOUT) |
252 | { | |
253 | waddch (w, '^'); | |
254 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
255 | } | |
312809f8 EZ |
256 | else if (c == '\t') |
257 | { | |
258 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ | |
259 | getyx (w, line, col); | |
260 | do | |
261 | { | |
262 | waddch (w, ' '); | |
263 | col++; | |
264 | } while ((col % 8) != 0); | |
265 | } | |
c906108c SS |
266 | else |
267 | { | |
a198b876 | 268 | waddch (w, c); |
c906108c | 269 | } |
a198b876 | 270 | if (c == '\n') |
6f1cb6ea | 271 | TUI_CMD_WIN->detail.command_info.start_line = getcury (w); |
a198b876 SC |
272 | getyx (w, line, col); |
273 | if (col < prev_col) | |
274 | height++; | |
275 | prev_col = col; | |
c906108c | 276 | } |
a198b876 | 277 | wclrtobot (w); |
6f1cb6ea | 278 | TUI_CMD_WIN->detail.command_info.start_line = getcury (w); |
a198b876 | 279 | if (c_line >= 0) |
6f1cb6ea | 280 | wmove (w, c_line, c_pos); |
6d012f14 | 281 | TUI_CMD_WIN->detail.command_info.start_line -= height - 1; |
a198b876 | 282 | |
a198b876 SC |
283 | wrefresh (w); |
284 | fflush(stdout); | |
285 | } | |
286 | ||
1cc6d956 MS |
287 | /* Readline callback to prepare the terminal. It is called once each |
288 | time we enter readline. Terminal is already setup in curses | |
289 | mode. */ | |
a198b876 | 290 | static void |
88fa91b4 | 291 | tui_prep_terminal (int notused1) |
c906108c | 292 | { |
57266a33 SC |
293 | /* Save the prompt registered in readline to correctly display it. |
294 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
295 | rl_prompt because it points to an alloca buffer). */ | |
296 | xfree (tui_rl_saved_prompt); | |
36d6eb95 | 297 | tui_rl_saved_prompt = rl_prompt != NULL ? xstrdup (rl_prompt) : NULL; |
a198b876 | 298 | } |
c906108c | 299 | |
1cc6d956 MS |
300 | /* Readline callback to restore the terminal. It is called once each |
301 | time we leave readline. There is nothing to do in curses mode. */ | |
a198b876 SC |
302 | static void |
303 | tui_deprep_terminal (void) | |
304 | { | |
305 | } | |
c906108c | 306 | |
8cee930b | 307 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
308 | /* Read readline output pipe and feed the command window with it. |
309 | Should be removed when readline is clean. */ | |
310 | static void | |
01f69b38 | 311 | tui_readline_output (int error, gdb_client_data data) |
a198b876 SC |
312 | { |
313 | int size; | |
314 | char buf[256]; | |
c906108c | 315 | |
a198b876 SC |
316 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
317 | if (size > 0 && tui_active) | |
c906108c | 318 | { |
a198b876 SC |
319 | buf[size] = 0; |
320 | tui_puts (buf); | |
c906108c | 321 | } |
a198b876 | 322 | } |
8cee930b SC |
323 | #endif |
324 | ||
82083d6d | 325 | /* TUI version of displayer.crlf. */ |
8cee930b | 326 | |
82083d6d DE |
327 | static void |
328 | tui_mld_crlf (const struct match_list_displayer *displayer) | |
8cee930b | 329 | { |
82083d6d | 330 | tui_putc ('\n'); |
8cee930b SC |
331 | } |
332 | ||
82083d6d | 333 | /* TUI version of displayer.putch. */ |
8cee930b | 334 | |
82083d6d DE |
335 | static void |
336 | tui_mld_putch (const struct match_list_displayer *displayer, int ch) | |
8cee930b | 337 | { |
82083d6d | 338 | tui_putc (ch); |
8cee930b SC |
339 | } |
340 | ||
82083d6d DE |
341 | /* TUI version of displayer.puts. */ |
342 | ||
343 | static void | |
344 | tui_mld_puts (const struct match_list_displayer *displayer, const char *s) | |
8cee930b | 345 | { |
82083d6d DE |
346 | tui_puts (s); |
347 | } | |
8cee930b | 348 | |
82083d6d DE |
349 | /* TUI version of displayer.flush. */ |
350 | ||
351 | static void | |
352 | tui_mld_flush (const struct match_list_displayer *displayer) | |
353 | { | |
354 | wrefresh (TUI_CMD_WIN->generic.handle); | |
8cee930b SC |
355 | } |
356 | ||
82083d6d | 357 | /* TUI version of displayer.erase_entire_line. */ |
8cee930b | 358 | |
8cee930b | 359 | static void |
82083d6d | 360 | tui_mld_erase_entire_line (const struct match_list_displayer *displayer) |
8cee930b | 361 | { |
82083d6d | 362 | WINDOW *w = TUI_CMD_WIN->generic.handle; |
6f1cb6ea | 363 | int cur_y = getcury (w); |
8cee930b | 364 | |
6f1cb6ea | 365 | wmove (w, cur_y, 0); |
82083d6d | 366 | wclrtoeol (w); |
6f1cb6ea | 367 | wmove (w, cur_y, 0); |
82083d6d | 368 | } |
8cee930b | 369 | |
82083d6d | 370 | /* TUI version of displayer.beep. */ |
8cee930b | 371 | |
82083d6d DE |
372 | static void |
373 | tui_mld_beep (const struct match_list_displayer *displayer) | |
374 | { | |
375 | beep (); | |
376 | } | |
377 | ||
378 | /* Helper function for tui_mld_read_key. | |
379 | This temporarily replaces tui_getc for use during tab-completion | |
380 | match list display. */ | |
381 | ||
382 | static int | |
383 | tui_mld_getc (FILE *fp) | |
384 | { | |
385 | WINDOW *w = TUI_CMD_WIN->generic.handle; | |
386 | int c = wgetch (w); | |
8cee930b | 387 | |
82083d6d DE |
388 | return c; |
389 | } | |
8cee930b | 390 | |
82083d6d | 391 | /* TUI version of displayer.read_key. */ |
8cee930b | 392 | |
82083d6d DE |
393 | static int |
394 | tui_mld_read_key (const struct match_list_displayer *displayer) | |
395 | { | |
396 | rl_getc_func_t *prev = rl_getc_function; | |
397 | int c; | |
8cee930b | 398 | |
82083d6d DE |
399 | /* We can't use tui_getc as we need NEWLINE to not get emitted. */ |
400 | rl_getc_function = tui_mld_getc; | |
401 | c = rl_read_key (); | |
402 | rl_getc_function = prev; | |
403 | return c; | |
404 | } | |
8cee930b | 405 | |
82083d6d DE |
406 | /* TUI version of rl_completion_display_matches_hook. |
407 | See gdb_display_match_list for a description of the arguments. */ | |
8cee930b | 408 | |
82083d6d DE |
409 | static void |
410 | tui_rl_display_match_list (char **matches, int len, int max) | |
411 | { | |
412 | struct match_list_displayer displayer; | |
413 | ||
414 | rl_get_screen_size (&displayer.height, &displayer.width); | |
415 | displayer.crlf = tui_mld_crlf; | |
416 | displayer.putch = tui_mld_putch; | |
417 | displayer.puts = tui_mld_puts; | |
418 | displayer.flush = tui_mld_flush; | |
419 | displayer.erase_entire_line = tui_mld_erase_entire_line; | |
420 | displayer.beep = tui_mld_beep; | |
421 | displayer.read_key = tui_mld_read_key; | |
422 | ||
423 | gdb_display_match_list (matches, len, max, &displayer); | |
8cee930b | 424 | } |
a198b876 SC |
425 | |
426 | /* Setup the IO for curses or non-curses mode. | |
427 | - In non-curses mode, readline and gdb use the standard input and | |
428 | standard output/error directly. | |
429 | - In curses mode, the standard output/error is controlled by TUI | |
430 | with the tui_stdout and tui_stderr. The output is redirected in | |
431 | the curses command window. Several readline callbacks are installed | |
432 | so that readline asks for its input to the curses command window | |
433 | with wgetch(). */ | |
434 | void | |
435 | tui_setup_io (int mode) | |
436 | { | |
cc88a640 JK |
437 | extern int _rl_echoing_p; |
438 | ||
a198b876 | 439 | if (mode) |
c906108c | 440 | { |
a198b876 SC |
441 | /* Redirect readline to TUI. */ |
442 | tui_old_rl_redisplay_function = rl_redisplay_function; | |
443 | tui_old_rl_deprep_terminal = rl_deprep_term_function; | |
444 | tui_old_rl_prep_terminal = rl_prep_term_function; | |
445 | tui_old_rl_getc_function = rl_getc_function; | |
ef0b411a | 446 | tui_old_rl_display_matches_hook = rl_completion_display_matches_hook; |
a198b876 | 447 | tui_old_rl_outstream = rl_outstream; |
cc88a640 | 448 | tui_old_rl_echoing_p = _rl_echoing_p; |
a198b876 SC |
449 | rl_redisplay_function = tui_redisplay_readline; |
450 | rl_deprep_term_function = tui_deprep_terminal; | |
451 | rl_prep_term_function = tui_prep_terminal; | |
452 | rl_getc_function = tui_getc; | |
cc88a640 | 453 | _rl_echoing_p = 0; |
a198b876 SC |
454 | rl_outstream = tui_rl_outstream; |
455 | rl_prompt = 0; | |
8cee930b SC |
456 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
457 | rl_already_prompted = 0; | |
a198b876 SC |
458 | |
459 | /* Keep track of previous gdb output. */ | |
460 | tui_old_stdout = gdb_stdout; | |
461 | tui_old_stderr = gdb_stderr; | |
79a45e25 | 462 | tui_old_uiout = current_uiout; |
a198b876 SC |
463 | |
464 | /* Reconfigure gdb output. */ | |
465 | gdb_stdout = tui_stdout; | |
466 | gdb_stderr = tui_stderr; | |
467 | gdb_stdlog = gdb_stdout; /* for moment */ | |
468 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 469 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 470 | current_uiout = tui_out; |
9d876a16 SC |
471 | |
472 | /* Save tty for SIGCONT. */ | |
473 | savetty (); | |
c906108c | 474 | } |
a198b876 | 475 | else |
c906108c | 476 | { |
a198b876 SC |
477 | /* Restore gdb output. */ |
478 | gdb_stdout = tui_old_stdout; | |
479 | gdb_stderr = tui_old_stderr; | |
480 | gdb_stdlog = gdb_stdout; /* for moment */ | |
481 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 482 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 483 | current_uiout = tui_old_uiout; |
a198b876 SC |
484 | |
485 | /* Restore readline. */ | |
486 | rl_redisplay_function = tui_old_rl_redisplay_function; | |
487 | rl_deprep_term_function = tui_old_rl_deprep_terminal; | |
488 | rl_prep_term_function = tui_old_rl_prep_terminal; | |
489 | rl_getc_function = tui_old_rl_getc_function; | |
ef0b411a | 490 | rl_completion_display_matches_hook = tui_old_rl_display_matches_hook; |
a198b876 | 491 | rl_outstream = tui_old_rl_outstream; |
cc88a640 | 492 | _rl_echoing_p = tui_old_rl_echoing_p; |
bd9b0abf | 493 | rl_already_prompted = 0; |
9d876a16 SC |
494 | |
495 | /* Save tty for SIGCONT. */ | |
496 | savetty (); | |
497 | } | |
498 | } | |
499 | ||
500 | #ifdef SIGCONT | |
501 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ | |
502 | static void | |
503 | tui_cont_sig (int sig) | |
504 | { | |
505 | if (tui_active) | |
506 | { | |
507 | /* Restore the terminal setting because another process (shell) | |
508 | might have changed it. */ | |
509 | resetty (); | |
510 | ||
511 | /* Force a refresh of the screen. */ | |
a21fcd8f | 512 | tui_refresh_all_win (); |
d75e970c | 513 | |
6d012f14 | 514 | wrefresh (TUI_CMD_WIN->generic.handle); |
c906108c | 515 | } |
9d876a16 | 516 | signal (sig, tui_cont_sig); |
a198b876 | 517 | } |
9d876a16 | 518 | #endif |
c906108c | 519 | |
a198b876 SC |
520 | /* Initialize the IO for gdb in curses mode. */ |
521 | void | |
d02c80cd | 522 | tui_initialize_io (void) |
a198b876 | 523 | { |
9d876a16 SC |
524 | #ifdef SIGCONT |
525 | signal (SIGCONT, tui_cont_sig); | |
526 | #endif | |
527 | ||
a198b876 SC |
528 | /* Create tui output streams. */ |
529 | tui_stdout = tui_fileopen (stdout); | |
530 | tui_stderr = tui_fileopen (stderr); | |
531 | tui_out = tui_out_new (tui_stdout); | |
532 | ||
43df09d9 | 533 | /* Create the default UI. */ |
4801a9a3 | 534 | tui_old_uiout = cli_out_new (gdb_stdout); |
a198b876 | 535 | |
8cee930b | 536 | #ifdef TUI_USE_PIPE_FOR_READLINE |
1cc6d956 MS |
537 | /* Temporary solution for readline writing to stdout: redirect |
538 | readline output in a pipe, read that pipe and output the content | |
539 | in the curses command window. */ | |
614c279d | 540 | if (gdb_pipe_cloexec (tui_readline_pipe) != 0) |
e0e6bcab GB |
541 | error (_("Cannot create pipe for readline")); |
542 | ||
a198b876 SC |
543 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
544 | if (tui_rl_outstream == 0) | |
e0e6bcab GB |
545 | error (_("Cannot redirect readline output")); |
546 | ||
0f59c96f | 547 | setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0); |
c906108c | 548 | |
a198b876 SC |
549 | #ifdef O_NONBLOCK |
550 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 551 | #else |
a198b876 SC |
552 | #ifdef O_NDELAY |
553 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 554 | #endif |
a198b876 | 555 | #endif |
a198b876 | 556 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
557 | #else |
558 | tui_rl_outstream = stdout; | |
559 | #endif | |
a198b876 SC |
560 | } |
561 | ||
1cc6d956 MS |
562 | /* Get a character from the command window. This is called from the |
563 | readline package. */ | |
a198b876 SC |
564 | int |
565 | tui_getc (FILE *fp) | |
566 | { | |
567 | int ch; | |
568 | WINDOW *w; | |
569 | ||
6d012f14 | 570 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 571 | |
8cee930b | 572 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 573 | /* Flush readline output. */ |
01f69b38 | 574 | tui_readline_output (0, 0); |
8cee930b SC |
575 | #endif |
576 | ||
a198b876 | 577 | ch = wgetch (w); |
c906108c | 578 | |
1cc6d956 MS |
579 | /* The \n must be echoed because it will not be printed by |
580 | readline. */ | |
a198b876 SC |
581 | if (ch == '\n') |
582 | { | |
583 | /* When hitting return with an empty input, gdb executes the last | |
584 | command. If we emit a newline, this fills up the command window | |
585 | with empty lines with gdb prompt at beginning. Instead of that, | |
586 | stay on the same line but provide a visual effect to show the | |
587 | user we recognized the command. */ | |
948578a9 | 588 | if (rl_end == 0 && !gdb_in_secondary_prompt_p ()) |
a198b876 | 589 | { |
6f1cb6ea | 590 | wmove (w, getcury (w), 0); |
a198b876 SC |
591 | |
592 | /* Clear the line. This will blink the gdb prompt since | |
593 | it will be redrawn at the same line. */ | |
594 | wclrtoeol (w); | |
595 | wrefresh (w); | |
596 | napms (20); | |
597 | } | |
598 | else | |
599 | { | |
d9080678 PP |
600 | /* Move cursor to the end of the command line before emitting the |
601 | newline. We need to do so because when ncurses outputs a newline | |
602 | it truncates any text that appears past the end of the cursor. */ | |
6f1cb6ea PP |
603 | int px, py; |
604 | getyx (w, py, px); | |
d9080678 PP |
605 | px += rl_end - rl_point; |
606 | py += px / TUI_CMD_WIN->generic.width; | |
607 | px %= TUI_CMD_WIN->generic.width; | |
608 | wmove (w, py, px); | |
7a8bcb88 | 609 | tui_putc ('\n'); |
a198b876 SC |
610 | } |
611 | } | |
612 | ||
69efdff1 PP |
613 | /* Handle prev/next/up/down here. */ |
614 | ch = tui_dispatch_ctrl_char (ch); | |
a198b876 | 615 | |
a198b876 SC |
616 | if (ch == KEY_BACKSPACE) |
617 | return '\b'; | |
d64e57fa PP |
618 | |
619 | if (async_command_editing_p && key_is_start_sequence (ch)) | |
620 | { | |
621 | int ch_pending; | |
622 | ||
623 | nodelay (w, TRUE); | |
624 | ch_pending = wgetch (w); | |
625 | nodelay (w, FALSE); | |
626 | ||
627 | /* If we have pending input following a start sequence, call the stdin | |
628 | event handler again because ncurses may have already read and stored | |
629 | the input into its internal buffer, meaning that we won't get an stdin | |
630 | event for it. If we don't compensate for this missed stdin event, key | |
631 | sequences as Alt_F (^[f) will not behave promptly. | |
632 | ||
633 | (We only compensates for the missed 2nd byte of a key sequence because | |
634 | 2-byte sequences are by far the most commonly used. ncurses may have | |
635 | buffered a larger, 3+-byte key sequence though it remains to be seen | |
636 | whether it is useful to compensate for all the bytes of such | |
637 | sequences.) */ | |
638 | if (ch_pending != ERR) | |
639 | { | |
640 | ungetch (ch_pending); | |
641 | call_stdin_event_handler_again_p = 1; | |
642 | } | |
643 | } | |
644 | ||
c906108c | 645 | return ch; |
a198b876 | 646 | } |
c906108c | 647 | |
312809f8 EZ |
648 | /* Utility function to expand TABs in a STRING into spaces. STRING |
649 | will be displayed starting at column COL, and is assumed to include | |
650 | no newlines. The returned expanded string is malloc'ed. */ | |
651 | ||
652 | char * | |
653 | tui_expand_tabs (const char *string, int col) | |
654 | { | |
b1a0f704 | 655 | int n_adjust, ncol; |
312809f8 EZ |
656 | const char *s; |
657 | char *ret, *q; | |
658 | ||
659 | /* 1. How many additional characters do we need? */ | |
b1a0f704 | 660 | for (ncol = col, n_adjust = 0, s = string; s; ) |
312809f8 EZ |
661 | { |
662 | s = strpbrk (s, "\t"); | |
663 | if (s) | |
664 | { | |
b1a0f704 | 665 | ncol += (s - string) + n_adjust; |
312809f8 EZ |
666 | /* Adjustment for the next tab stop, minus one for the TAB |
667 | we replace with spaces. */ | |
b1a0f704 | 668 | n_adjust += 8 - (ncol % 8) - 1; |
312809f8 EZ |
669 | s++; |
670 | } | |
671 | } | |
672 | ||
673 | /* Allocate the copy. */ | |
224c3ddb | 674 | ret = q = (char *) xmalloc (strlen (string) + n_adjust + 1); |
312809f8 EZ |
675 | |
676 | /* 2. Copy the original string while replacing TABs with spaces. */ | |
b1a0f704 | 677 | for (ncol = col, s = string; s; ) |
312809f8 | 678 | { |
cd46431b | 679 | const char *s1 = strpbrk (s, "\t"); |
312809f8 EZ |
680 | if (s1) |
681 | { | |
682 | if (s1 > s) | |
683 | { | |
684 | strncpy (q, s, s1 - s); | |
685 | q += s1 - s; | |
b1a0f704 | 686 | ncol += s1 - s; |
312809f8 EZ |
687 | } |
688 | do { | |
689 | *q++ = ' '; | |
b1a0f704 EZ |
690 | ncol++; |
691 | } while ((ncol % 8) != 0); | |
312809f8 EZ |
692 | s1++; |
693 | } | |
694 | else | |
695 | strcpy (q, s); | |
696 | s = s1; | |
697 | } | |
698 | ||
699 | return ret; | |
700 | } |