Commit | Line | Data |
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f377b406 | 1 | /* TUI support I/O functions. |
f33c6cbf | 2 | |
e2882c85 | 3 | Copyright (C) 1998-2018 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" | |
112e8700 | 35 | #include "tui/tui-out.h" |
a198b876 SC |
36 | #include "ui-out.h" |
37 | #include "cli-out.h" | |
38 | #include <fcntl.h> | |
9d876a16 | 39 | #include <signal.h> |
614c279d | 40 | #include "filestuff.h" |
82083d6d | 41 | #include "completer.h" |
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 | ||
ec6f8892 SC |
67 | /* Use definition from readline 4.3. */ |
68 | #undef CTRL_CHAR | |
08ef48c5 MS |
69 | #define CTRL_CHAR(c) \ |
70 | ((c) < control_character_threshold && (((c) & 0x80) == 0)) | |
ec6f8892 | 71 | |
a198b876 SC |
72 | /* This file controls the IO interactions between gdb and curses. |
73 | When the TUI is enabled, gdb has two modes a curses and a standard | |
74 | mode. | |
75 | ||
1cc6d956 MS |
76 | In curses mode, the gdb outputs are made in a curses command |
77 | window. For this, the gdb_stdout and gdb_stderr are redirected to | |
78 | the specific ui_file implemented by TUI. The output is handled by | |
79 | tui_puts(). The input is also controlled by curses with | |
80 | tui_getc(). The readline library uses this function to get its | |
81 | input. Several readline hooks are installed to redirect readline | |
82 | output to the TUI (see also the note below). | |
a198b876 SC |
83 | |
84 | In normal mode, the gdb outputs are restored to their origin, that | |
85 | is as if TUI is not used. Readline also uses its original getc() | |
86 | function with stdin. | |
87 | ||
1cc6d956 MS |
88 | Note SCz/2001-07-21: the current readline is not clean in its |
89 | management of the output. Even if we install a redisplay handler, | |
90 | it sometimes writes on a stdout file. It is important to redirect | |
91 | every output produced by readline, otherwise the curses window will | |
92 | be garbled. This is implemented with a pipe that TUI reads and | |
93 | readline writes to. A gdb input handler is created so that reading | |
94 | the pipe is handled automatically. This will probably not work on | |
95 | non-Unix platforms. The best fix is to make readline clean enougth | |
96 | so that is never write on stdout. | |
97 | ||
98 | Note SCz/2002-09-01: we now use more readline hooks and it seems | |
99 | that with them we don't need the pipe anymore (verified by creating | |
100 | the pipe and closing its end so that write causes a SIGPIPE). The | |
101 | old pipe code is still there and can be conditionally removed by | |
8cee930b SC |
102 | #undef TUI_USE_PIPE_FOR_READLINE. */ |
103 | ||
104 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ | |
a156a290 | 105 | #ifdef HAVE_PIPE |
8cee930b | 106 | #define TUI_USE_PIPE_FOR_READLINE |
a156a290 | 107 | #endif |
1cc6d956 | 108 | /* #undef TUI_USE_PIPE_FOR_READLINE */ |
a198b876 SC |
109 | |
110 | /* TUI output files. */ | |
111 | static struct ui_file *tui_stdout; | |
112 | static struct ui_file *tui_stderr; | |
2b68e2c5 | 113 | struct ui_out *tui_out; |
a198b876 SC |
114 | |
115 | /* GDB output files in non-curses mode. */ | |
116 | static struct ui_file *tui_old_stdout; | |
117 | static struct ui_file *tui_old_stderr; | |
112e8700 | 118 | cli_ui_out *tui_old_uiout; |
a198b876 SC |
119 | |
120 | /* Readline previous hooks. */ | |
840ed64d JK |
121 | static rl_getc_func_t *tui_old_rl_getc_function; |
122 | static rl_voidfunc_t *tui_old_rl_redisplay_function; | |
123 | static rl_vintfunc_t *tui_old_rl_prep_terminal; | |
124 | static rl_voidfunc_t *tui_old_rl_deprep_terminal; | |
ef0b411a | 125 | static rl_compdisp_func_t *tui_old_rl_display_matches_hook; |
cc88a640 | 126 | static int tui_old_rl_echoing_p; |
a198b876 SC |
127 | |
128 | /* Readline output stream. | |
129 | Should be removed when readline is clean. */ | |
130 | static FILE *tui_rl_outstream; | |
131 | static FILE *tui_old_rl_outstream; | |
8cee930b | 132 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 133 | static int tui_readline_pipe[2]; |
8cee930b | 134 | #endif |
c906108c | 135 | |
57266a33 SC |
136 | /* The last gdb prompt that was registered in readline. |
137 | This may be the main gdb prompt or a secondary prompt. */ | |
138 | static char *tui_rl_saved_prompt; | |
139 | ||
9753a2f6 PA |
140 | /* Print a character in the curses command window. The output is |
141 | buffered. It is up to the caller to refresh the screen if | |
142 | necessary. */ | |
143 | ||
144 | static void | |
145 | do_tui_putc (WINDOW *w, char c) | |
146 | { | |
147 | static int tui_skip_line = -1; | |
148 | ||
149 | /* Catch annotation and discard them. We need two \032 and discard | |
150 | until a \n is seen. */ | |
151 | if (c == '\032') | |
152 | { | |
153 | tui_skip_line++; | |
154 | } | |
155 | else if (tui_skip_line != 1) | |
156 | { | |
157 | tui_skip_line = -1; | |
158 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ | |
159 | if (c == '\t') | |
160 | { | |
161 | int col; | |
162 | ||
163 | col = getcurx (w); | |
164 | do | |
165 | { | |
166 | waddch (w, ' '); | |
167 | col++; | |
168 | } | |
169 | while ((col % 8) != 0); | |
170 | } | |
171 | else | |
172 | waddch (w, c); | |
173 | } | |
174 | else if (c == '\n') | |
175 | tui_skip_line = -1; | |
176 | } | |
177 | ||
178 | /* Update the cached value of the command window's start line based on | |
179 | the window's current Y coordinate. */ | |
180 | ||
181 | static void | |
182 | update_cmdwin_start_line () | |
183 | { | |
184 | TUI_CMD_WIN->detail.command_info.start_line | |
185 | = getcury (TUI_CMD_WIN->generic.handle); | |
186 | } | |
187 | ||
188 | /* Print a character in the curses command window. The output is | |
189 | buffered. It is up to the caller to refresh the screen if | |
190 | necessary. */ | |
191 | ||
8cee930b SC |
192 | static void |
193 | tui_putc (char c) | |
194 | { | |
9753a2f6 | 195 | WINDOW *w = TUI_CMD_WIN->generic.handle; |
8cee930b | 196 | |
9753a2f6 PA |
197 | do_tui_putc (w, c); |
198 | update_cmdwin_start_line (); | |
8cee930b | 199 | } |
c906108c | 200 | |
9753a2f6 PA |
201 | /* Print LENGTH characters from the buffer pointed to by BUF to the |
202 | curses command window. The output is buffered. It is up to the | |
203 | caller to refresh the screen if necessary. */ | |
204 | ||
205 | void | |
206 | tui_write (const char *buf, size_t length) | |
207 | { | |
208 | WINDOW *w = TUI_CMD_WIN->generic.handle; | |
209 | ||
210 | for (size_t i = 0; i < length; i++) | |
211 | do_tui_putc (w, buf[i]); | |
212 | update_cmdwin_start_line (); | |
213 | } | |
214 | ||
215 | /* Print a string in the curses command window. The output is | |
216 | buffered. It is up to the caller to refresh the screen if | |
217 | necessary. */ | |
518be979 | 218 | |
c906108c | 219 | void |
a198b876 | 220 | tui_puts (const char *string) |
c906108c | 221 | { |
9753a2f6 | 222 | WINDOW *w = TUI_CMD_WIN->generic.handle; |
a198b876 | 223 | char c; |
c906108c | 224 | |
a198b876 | 225 | while ((c = *string++) != 0) |
9753a2f6 PA |
226 | do_tui_putc (w, c); |
227 | update_cmdwin_start_line (); | |
a198b876 SC |
228 | } |
229 | ||
230 | /* Readline callback. | |
231 | Redisplay the command line with its prompt after readline has | |
232 | changed the edited text. */ | |
e09d2eba | 233 | void |
a198b876 SC |
234 | tui_redisplay_readline (void) |
235 | { | |
236 | int prev_col; | |
237 | int height; | |
cecc8b99 | 238 | int col; |
a198b876 SC |
239 | int c_pos; |
240 | int c_line; | |
241 | int in; | |
242 | WINDOW *w; | |
e6a959d6 | 243 | const char *prompt; |
a198b876 | 244 | int start_line; |
e3da6fc5 SC |
245 | |
246 | /* Detect when we temporarily left SingleKey and now the readline | |
1cc6d956 | 247 | edit buffer is empty, automatically restore the SingleKey |
9b8d6827 SC |
248 | mode. The restore must only be done if the command has finished. |
249 | The command could call prompt_for_continue and we must not | |
250 | restore SingleKey so that the prompt and normal keymap are used. */ | |
251 | if (tui_current_key_mode == TUI_ONE_COMMAND_MODE && rl_end == 0 | |
dbf30ca3 | 252 | && !gdb_in_secondary_prompt_p (current_ui)) |
6d012f14 | 253 | tui_set_key_mode (TUI_SINGLE_KEY_MODE); |
e3da6fc5 | 254 | |
6d012f14 | 255 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
e09d2eba SC |
256 | prompt = ""; |
257 | else | |
57266a33 | 258 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
259 | |
260 | c_pos = -1; | |
261 | c_line = -1; | |
6d012f14 AC |
262 | w = TUI_CMD_WIN->generic.handle; |
263 | start_line = TUI_CMD_WIN->detail.command_info.start_line; | |
a198b876 SC |
264 | wmove (w, start_line, 0); |
265 | prev_col = 0; | |
266 | height = 1; | |
267 | for (in = 0; prompt && prompt[in]; in++) | |
268 | { | |
269 | waddch (w, prompt[in]); | |
cecc8b99 | 270 | col = getcurx (w); |
588dcc3e | 271 | if (col <= prev_col) |
a198b876 SC |
272 | height++; |
273 | prev_col = col; | |
274 | } | |
588dcc3e | 275 | for (in = 0; in <= rl_end; in++) |
a198b876 SC |
276 | { |
277 | unsigned char c; | |
278 | ||
a198b876 SC |
279 | if (in == rl_point) |
280 | { | |
281 | getyx (w, c_line, c_pos); | |
282 | } | |
283 | ||
588dcc3e PP |
284 | if (in == rl_end) |
285 | break; | |
286 | ||
287 | c = (unsigned char) rl_line_buffer[in]; | |
a198b876 SC |
288 | if (CTRL_CHAR (c) || c == RUBOUT) |
289 | { | |
290 | waddch (w, '^'); | |
291 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
292 | } | |
312809f8 EZ |
293 | else if (c == '\t') |
294 | { | |
295 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ | |
cecc8b99 | 296 | col = getcurx (w); |
312809f8 EZ |
297 | do |
298 | { | |
299 | waddch (w, ' '); | |
300 | col++; | |
301 | } while ((col % 8) != 0); | |
302 | } | |
c906108c SS |
303 | else |
304 | { | |
a198b876 | 305 | waddch (w, c); |
c906108c | 306 | } |
a198b876 | 307 | if (c == '\n') |
6f1cb6ea | 308 | TUI_CMD_WIN->detail.command_info.start_line = getcury (w); |
cecc8b99 | 309 | col = getcurx (w); |
a198b876 SC |
310 | if (col < prev_col) |
311 | height++; | |
312 | prev_col = col; | |
c906108c | 313 | } |
a198b876 | 314 | wclrtobot (w); |
6f1cb6ea | 315 | TUI_CMD_WIN->detail.command_info.start_line = getcury (w); |
a198b876 | 316 | if (c_line >= 0) |
6f1cb6ea | 317 | wmove (w, c_line, c_pos); |
6d012f14 | 318 | TUI_CMD_WIN->detail.command_info.start_line -= height - 1; |
a198b876 | 319 | |
a198b876 SC |
320 | wrefresh (w); |
321 | fflush(stdout); | |
322 | } | |
323 | ||
1cc6d956 MS |
324 | /* Readline callback to prepare the terminal. It is called once each |
325 | time we enter readline. Terminal is already setup in curses | |
326 | mode. */ | |
a198b876 | 327 | static void |
88fa91b4 | 328 | tui_prep_terminal (int notused1) |
c906108c | 329 | { |
57266a33 SC |
330 | /* Save the prompt registered in readline to correctly display it. |
331 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
332 | rl_prompt because it points to an alloca buffer). */ | |
333 | xfree (tui_rl_saved_prompt); | |
36d6eb95 | 334 | tui_rl_saved_prompt = rl_prompt != NULL ? xstrdup (rl_prompt) : NULL; |
a198b876 | 335 | } |
c906108c | 336 | |
1cc6d956 MS |
337 | /* Readline callback to restore the terminal. It is called once each |
338 | time we leave readline. There is nothing to do in curses mode. */ | |
a198b876 SC |
339 | static void |
340 | tui_deprep_terminal (void) | |
341 | { | |
342 | } | |
c906108c | 343 | |
8cee930b | 344 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
345 | /* Read readline output pipe and feed the command window with it. |
346 | Should be removed when readline is clean. */ | |
347 | static void | |
01f69b38 | 348 | tui_readline_output (int error, gdb_client_data data) |
a198b876 SC |
349 | { |
350 | int size; | |
351 | char buf[256]; | |
c906108c | 352 | |
a198b876 SC |
353 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
354 | if (size > 0 && tui_active) | |
c906108c | 355 | { |
a198b876 SC |
356 | buf[size] = 0; |
357 | tui_puts (buf); | |
c906108c | 358 | } |
a198b876 | 359 | } |
8cee930b SC |
360 | #endif |
361 | ||
82083d6d | 362 | /* TUI version of displayer.crlf. */ |
8cee930b | 363 | |
82083d6d DE |
364 | static void |
365 | tui_mld_crlf (const struct match_list_displayer *displayer) | |
8cee930b | 366 | { |
82083d6d | 367 | tui_putc ('\n'); |
8cee930b SC |
368 | } |
369 | ||
82083d6d | 370 | /* TUI version of displayer.putch. */ |
8cee930b | 371 | |
82083d6d DE |
372 | static void |
373 | tui_mld_putch (const struct match_list_displayer *displayer, int ch) | |
8cee930b | 374 | { |
82083d6d | 375 | tui_putc (ch); |
8cee930b SC |
376 | } |
377 | ||
82083d6d DE |
378 | /* TUI version of displayer.puts. */ |
379 | ||
380 | static void | |
381 | tui_mld_puts (const struct match_list_displayer *displayer, const char *s) | |
8cee930b | 382 | { |
82083d6d DE |
383 | tui_puts (s); |
384 | } | |
8cee930b | 385 | |
82083d6d DE |
386 | /* TUI version of displayer.flush. */ |
387 | ||
388 | static void | |
389 | tui_mld_flush (const struct match_list_displayer *displayer) | |
390 | { | |
391 | wrefresh (TUI_CMD_WIN->generic.handle); | |
8cee930b SC |
392 | } |
393 | ||
82083d6d | 394 | /* TUI version of displayer.erase_entire_line. */ |
8cee930b | 395 | |
8cee930b | 396 | static void |
82083d6d | 397 | tui_mld_erase_entire_line (const struct match_list_displayer *displayer) |
8cee930b | 398 | { |
82083d6d | 399 | WINDOW *w = TUI_CMD_WIN->generic.handle; |
6f1cb6ea | 400 | int cur_y = getcury (w); |
8cee930b | 401 | |
6f1cb6ea | 402 | wmove (w, cur_y, 0); |
82083d6d | 403 | wclrtoeol (w); |
6f1cb6ea | 404 | wmove (w, cur_y, 0); |
82083d6d | 405 | } |
8cee930b | 406 | |
82083d6d | 407 | /* TUI version of displayer.beep. */ |
8cee930b | 408 | |
82083d6d DE |
409 | static void |
410 | tui_mld_beep (const struct match_list_displayer *displayer) | |
411 | { | |
412 | beep (); | |
413 | } | |
414 | ||
415 | /* Helper function for tui_mld_read_key. | |
416 | This temporarily replaces tui_getc for use during tab-completion | |
417 | match list display. */ | |
418 | ||
419 | static int | |
420 | tui_mld_getc (FILE *fp) | |
421 | { | |
422 | WINDOW *w = TUI_CMD_WIN->generic.handle; | |
423 | int c = wgetch (w); | |
8cee930b | 424 | |
82083d6d DE |
425 | return c; |
426 | } | |
8cee930b | 427 | |
82083d6d | 428 | /* TUI version of displayer.read_key. */ |
8cee930b | 429 | |
82083d6d DE |
430 | static int |
431 | tui_mld_read_key (const struct match_list_displayer *displayer) | |
432 | { | |
433 | rl_getc_func_t *prev = rl_getc_function; | |
434 | int c; | |
8cee930b | 435 | |
82083d6d DE |
436 | /* We can't use tui_getc as we need NEWLINE to not get emitted. */ |
437 | rl_getc_function = tui_mld_getc; | |
438 | c = rl_read_key (); | |
439 | rl_getc_function = prev; | |
440 | return c; | |
441 | } | |
8cee930b | 442 | |
82083d6d DE |
443 | /* TUI version of rl_completion_display_matches_hook. |
444 | See gdb_display_match_list for a description of the arguments. */ | |
8cee930b | 445 | |
82083d6d DE |
446 | static void |
447 | tui_rl_display_match_list (char **matches, int len, int max) | |
448 | { | |
449 | struct match_list_displayer displayer; | |
450 | ||
451 | rl_get_screen_size (&displayer.height, &displayer.width); | |
452 | displayer.crlf = tui_mld_crlf; | |
453 | displayer.putch = tui_mld_putch; | |
454 | displayer.puts = tui_mld_puts; | |
455 | displayer.flush = tui_mld_flush; | |
456 | displayer.erase_entire_line = tui_mld_erase_entire_line; | |
457 | displayer.beep = tui_mld_beep; | |
458 | displayer.read_key = tui_mld_read_key; | |
459 | ||
460 | gdb_display_match_list (matches, len, max, &displayer); | |
8cee930b | 461 | } |
a198b876 SC |
462 | |
463 | /* Setup the IO for curses or non-curses mode. | |
464 | - In non-curses mode, readline and gdb use the standard input and | |
465 | standard output/error directly. | |
466 | - In curses mode, the standard output/error is controlled by TUI | |
467 | with the tui_stdout and tui_stderr. The output is redirected in | |
468 | the curses command window. Several readline callbacks are installed | |
469 | so that readline asks for its input to the curses command window | |
470 | with wgetch(). */ | |
471 | void | |
472 | tui_setup_io (int mode) | |
473 | { | |
cc88a640 JK |
474 | extern int _rl_echoing_p; |
475 | ||
a198b876 | 476 | if (mode) |
c906108c | 477 | { |
a198b876 SC |
478 | /* Redirect readline to TUI. */ |
479 | tui_old_rl_redisplay_function = rl_redisplay_function; | |
480 | tui_old_rl_deprep_terminal = rl_deprep_term_function; | |
481 | tui_old_rl_prep_terminal = rl_prep_term_function; | |
482 | tui_old_rl_getc_function = rl_getc_function; | |
ef0b411a | 483 | tui_old_rl_display_matches_hook = rl_completion_display_matches_hook; |
a198b876 | 484 | tui_old_rl_outstream = rl_outstream; |
cc88a640 | 485 | tui_old_rl_echoing_p = _rl_echoing_p; |
a198b876 SC |
486 | rl_redisplay_function = tui_redisplay_readline; |
487 | rl_deprep_term_function = tui_deprep_terminal; | |
488 | rl_prep_term_function = tui_prep_terminal; | |
489 | rl_getc_function = tui_getc; | |
cc88a640 | 490 | _rl_echoing_p = 0; |
a198b876 SC |
491 | rl_outstream = tui_rl_outstream; |
492 | rl_prompt = 0; | |
8cee930b SC |
493 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
494 | rl_already_prompted = 0; | |
a198b876 SC |
495 | |
496 | /* Keep track of previous gdb output. */ | |
497 | tui_old_stdout = gdb_stdout; | |
498 | tui_old_stderr = gdb_stderr; | |
112e8700 SM |
499 | tui_old_uiout = dynamic_cast<cli_ui_out *> (current_uiout); |
500 | gdb_assert (tui_old_uiout != nullptr); | |
a198b876 SC |
501 | |
502 | /* Reconfigure gdb output. */ | |
503 | gdb_stdout = tui_stdout; | |
504 | gdb_stderr = tui_stderr; | |
505 | gdb_stdlog = gdb_stdout; /* for moment */ | |
506 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 507 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 508 | current_uiout = tui_out; |
9d876a16 SC |
509 | |
510 | /* Save tty for SIGCONT. */ | |
511 | savetty (); | |
c906108c | 512 | } |
a198b876 | 513 | else |
c906108c | 514 | { |
a198b876 SC |
515 | /* Restore gdb output. */ |
516 | gdb_stdout = tui_old_stdout; | |
517 | gdb_stderr = tui_old_stderr; | |
518 | gdb_stdlog = gdb_stdout; /* for moment */ | |
519 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 520 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 521 | current_uiout = tui_old_uiout; |
a198b876 SC |
522 | |
523 | /* Restore readline. */ | |
524 | rl_redisplay_function = tui_old_rl_redisplay_function; | |
525 | rl_deprep_term_function = tui_old_rl_deprep_terminal; | |
526 | rl_prep_term_function = tui_old_rl_prep_terminal; | |
527 | rl_getc_function = tui_old_rl_getc_function; | |
ef0b411a | 528 | rl_completion_display_matches_hook = tui_old_rl_display_matches_hook; |
a198b876 | 529 | rl_outstream = tui_old_rl_outstream; |
cc88a640 | 530 | _rl_echoing_p = tui_old_rl_echoing_p; |
bd9b0abf | 531 | rl_already_prompted = 0; |
9d876a16 SC |
532 | |
533 | /* Save tty for SIGCONT. */ | |
534 | savetty (); | |
535 | } | |
536 | } | |
537 | ||
538 | #ifdef SIGCONT | |
539 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ | |
540 | static void | |
541 | tui_cont_sig (int sig) | |
542 | { | |
543 | if (tui_active) | |
544 | { | |
545 | /* Restore the terminal setting because another process (shell) | |
546 | might have changed it. */ | |
547 | resetty (); | |
548 | ||
549 | /* Force a refresh of the screen. */ | |
a21fcd8f | 550 | tui_refresh_all_win (); |
d75e970c | 551 | |
6d012f14 | 552 | wrefresh (TUI_CMD_WIN->generic.handle); |
c906108c | 553 | } |
9d876a16 | 554 | signal (sig, tui_cont_sig); |
a198b876 | 555 | } |
9d876a16 | 556 | #endif |
c906108c | 557 | |
a198b876 SC |
558 | /* Initialize the IO for gdb in curses mode. */ |
559 | void | |
d02c80cd | 560 | tui_initialize_io (void) |
a198b876 | 561 | { |
9d876a16 SC |
562 | #ifdef SIGCONT |
563 | signal (SIGCONT, tui_cont_sig); | |
564 | #endif | |
565 | ||
a198b876 | 566 | /* Create tui output streams. */ |
d7e74731 PA |
567 | tui_stdout = new tui_file (stdout); |
568 | tui_stderr = new tui_file (stderr); | |
a198b876 SC |
569 | tui_out = tui_out_new (tui_stdout); |
570 | ||
43df09d9 | 571 | /* Create the default UI. */ |
4801a9a3 | 572 | tui_old_uiout = cli_out_new (gdb_stdout); |
a198b876 | 573 | |
8cee930b | 574 | #ifdef TUI_USE_PIPE_FOR_READLINE |
1cc6d956 MS |
575 | /* Temporary solution for readline writing to stdout: redirect |
576 | readline output in a pipe, read that pipe and output the content | |
577 | in the curses command window. */ | |
614c279d | 578 | if (gdb_pipe_cloexec (tui_readline_pipe) != 0) |
e0e6bcab GB |
579 | error (_("Cannot create pipe for readline")); |
580 | ||
a198b876 SC |
581 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
582 | if (tui_rl_outstream == 0) | |
e0e6bcab GB |
583 | error (_("Cannot redirect readline output")); |
584 | ||
0f59c96f | 585 | setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0); |
c906108c | 586 | |
a198b876 SC |
587 | #ifdef O_NONBLOCK |
588 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 589 | #else |
a198b876 SC |
590 | #ifdef O_NDELAY |
591 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 592 | #endif |
a198b876 | 593 | #endif |
a198b876 | 594 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
595 | #else |
596 | tui_rl_outstream = stdout; | |
597 | #endif | |
a198b876 SC |
598 | } |
599 | ||
1cc6d956 MS |
600 | /* Get a character from the command window. This is called from the |
601 | readline package. */ | |
a198b876 SC |
602 | int |
603 | tui_getc (FILE *fp) | |
604 | { | |
605 | int ch; | |
606 | WINDOW *w; | |
607 | ||
6d012f14 | 608 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 609 | |
8cee930b | 610 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 611 | /* Flush readline output. */ |
01f69b38 | 612 | tui_readline_output (0, 0); |
8cee930b SC |
613 | #endif |
614 | ||
a198b876 | 615 | ch = wgetch (w); |
c906108c | 616 | |
1cc6d956 MS |
617 | /* The \n must be echoed because it will not be printed by |
618 | readline. */ | |
a198b876 SC |
619 | if (ch == '\n') |
620 | { | |
621 | /* When hitting return with an empty input, gdb executes the last | |
622 | command. If we emit a newline, this fills up the command window | |
623 | with empty lines with gdb prompt at beginning. Instead of that, | |
624 | stay on the same line but provide a visual effect to show the | |
625 | user we recognized the command. */ | |
dbf30ca3 | 626 | if (rl_end == 0 && !gdb_in_secondary_prompt_p (current_ui)) |
a198b876 | 627 | { |
6f1cb6ea | 628 | wmove (w, getcury (w), 0); |
a198b876 SC |
629 | |
630 | /* Clear the line. This will blink the gdb prompt since | |
631 | it will be redrawn at the same line. */ | |
632 | wclrtoeol (w); | |
633 | wrefresh (w); | |
634 | napms (20); | |
635 | } | |
636 | else | |
637 | { | |
d9080678 PP |
638 | /* Move cursor to the end of the command line before emitting the |
639 | newline. We need to do so because when ncurses outputs a newline | |
640 | it truncates any text that appears past the end of the cursor. */ | |
6f1cb6ea PP |
641 | int px, py; |
642 | getyx (w, py, px); | |
d9080678 PP |
643 | px += rl_end - rl_point; |
644 | py += px / TUI_CMD_WIN->generic.width; | |
645 | px %= TUI_CMD_WIN->generic.width; | |
646 | wmove (w, py, px); | |
7a8bcb88 | 647 | tui_putc ('\n'); |
a198b876 SC |
648 | } |
649 | } | |
650 | ||
69efdff1 PP |
651 | /* Handle prev/next/up/down here. */ |
652 | ch = tui_dispatch_ctrl_char (ch); | |
a198b876 | 653 | |
a198b876 SC |
654 | if (ch == KEY_BACKSPACE) |
655 | return '\b'; | |
d64e57fa | 656 | |
3c216924 | 657 | if (current_ui->command_editing && key_is_start_sequence (ch)) |
d64e57fa PP |
658 | { |
659 | int ch_pending; | |
660 | ||
661 | nodelay (w, TRUE); | |
662 | ch_pending = wgetch (w); | |
663 | nodelay (w, FALSE); | |
664 | ||
665 | /* If we have pending input following a start sequence, call the stdin | |
666 | event handler again because ncurses may have already read and stored | |
667 | the input into its internal buffer, meaning that we won't get an stdin | |
668 | event for it. If we don't compensate for this missed stdin event, key | |
669 | sequences as Alt_F (^[f) will not behave promptly. | |
670 | ||
671 | (We only compensates for the missed 2nd byte of a key sequence because | |
672 | 2-byte sequences are by far the most commonly used. ncurses may have | |
673 | buffered a larger, 3+-byte key sequence though it remains to be seen | |
674 | whether it is useful to compensate for all the bytes of such | |
675 | sequences.) */ | |
676 | if (ch_pending != ERR) | |
677 | { | |
678 | ungetch (ch_pending); | |
679 | call_stdin_event_handler_again_p = 1; | |
680 | } | |
681 | } | |
682 | ||
c906108c | 683 | return ch; |
a198b876 | 684 | } |
c906108c | 685 | |
312809f8 EZ |
686 | /* Utility function to expand TABs in a STRING into spaces. STRING |
687 | will be displayed starting at column COL, and is assumed to include | |
688 | no newlines. The returned expanded string is malloc'ed. */ | |
689 | ||
690 | char * | |
691 | tui_expand_tabs (const char *string, int col) | |
692 | { | |
b1a0f704 | 693 | int n_adjust, ncol; |
312809f8 EZ |
694 | const char *s; |
695 | char *ret, *q; | |
696 | ||
697 | /* 1. How many additional characters do we need? */ | |
b1a0f704 | 698 | for (ncol = col, n_adjust = 0, s = string; s; ) |
312809f8 EZ |
699 | { |
700 | s = strpbrk (s, "\t"); | |
701 | if (s) | |
702 | { | |
b1a0f704 | 703 | ncol += (s - string) + n_adjust; |
312809f8 EZ |
704 | /* Adjustment for the next tab stop, minus one for the TAB |
705 | we replace with spaces. */ | |
b1a0f704 | 706 | n_adjust += 8 - (ncol % 8) - 1; |
312809f8 EZ |
707 | s++; |
708 | } | |
709 | } | |
710 | ||
711 | /* Allocate the copy. */ | |
224c3ddb | 712 | ret = q = (char *) xmalloc (strlen (string) + n_adjust + 1); |
312809f8 EZ |
713 | |
714 | /* 2. Copy the original string while replacing TABs with spaces. */ | |
b1a0f704 | 715 | for (ncol = col, s = string; s; ) |
312809f8 | 716 | { |
cd46431b | 717 | const char *s1 = strpbrk (s, "\t"); |
312809f8 EZ |
718 | if (s1) |
719 | { | |
720 | if (s1 > s) | |
721 | { | |
722 | strncpy (q, s, s1 - s); | |
723 | q += s1 - s; | |
b1a0f704 | 724 | ncol += s1 - s; |
312809f8 EZ |
725 | } |
726 | do { | |
727 | *q++ = ' '; | |
b1a0f704 EZ |
728 | ncol++; |
729 | } while ((ncol % 8) != 0); | |
312809f8 EZ |
730 | s1++; |
731 | } | |
732 | else | |
733 | strcpy (q, s); | |
734 | s = s1; | |
735 | } | |
736 | ||
737 | return ret; | |
738 | } |