| 1 | /* TUI support I/O functions. |
| 2 | |
| 3 | Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, |
| 4 | Inc. |
| 5 | |
| 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. */ |
| 24 | |
| 25 | /* FIXME: cagney/2002-02-28: The GDB coding standard indicates that |
| 26 | "defs.h" should be included first. Unfortunatly some systems |
| 27 | (currently Debian GNU/Linux) include the <stdbool.h> via <curses.h> |
| 28 | and they clash with "bfd.h"'s definiton of true/false. The correct |
| 29 | fix is to remove true/false from "bfd.h", however, until that |
| 30 | happens, hack around it by including "config.h" and <curses.h> |
| 31 | first. */ |
| 32 | |
| 33 | #include "config.h" |
| 34 | #ifdef HAVE_NCURSES_H |
| 35 | #include <ncurses.h> |
| 36 | #else |
| 37 | #ifdef HAVE_CURSES_H |
| 38 | #include <curses.h> |
| 39 | #endif |
| 40 | #endif |
| 41 | |
| 42 | #include <stdio.h> |
| 43 | #include "defs.h" |
| 44 | #include "terminal.h" |
| 45 | #include "target.h" |
| 46 | #include "event-loop.h" |
| 47 | #include "event-top.h" |
| 48 | #include "command.h" |
| 49 | #include "top.h" |
| 50 | #include "readline/readline.h" |
| 51 | #include "tui.h" |
| 52 | #include "tuiData.h" |
| 53 | #include "tuiIO.h" |
| 54 | #include "tuiCommand.h" |
| 55 | #include "tuiWin.h" |
| 56 | #include "tuiGeneralWin.h" |
| 57 | #include "tui-file.h" |
| 58 | #include "ui-out.h" |
| 59 | #include "cli-out.h" |
| 60 | #include <fcntl.h> |
| 61 | #include <signal.h> |
| 62 | |
| 63 | /* Use definition from readline 4.3. */ |
| 64 | #undef CTRL_CHAR |
| 65 | #define CTRL_CHAR(c) ((c) < control_character_threshold && (((c) & 0x80) == 0)) |
| 66 | |
| 67 | /* This file controls the IO interactions between gdb and curses. |
| 68 | When the TUI is enabled, gdb has two modes a curses and a standard |
| 69 | mode. |
| 70 | |
| 71 | In curses mode, the gdb outputs are made in a curses command window. |
| 72 | For this, the gdb_stdout and gdb_stderr are redirected to the specific |
| 73 | ui_file implemented by TUI. The output is handled by tui_puts(). |
| 74 | The input is also controlled by curses with tui_getc(). The readline |
| 75 | library uses this function to get its input. Several readline hooks |
| 76 | are installed to redirect readline output to the TUI (see also the |
| 77 | note below). |
| 78 | |
| 79 | In normal mode, the gdb outputs are restored to their origin, that |
| 80 | is as if TUI is not used. Readline also uses its original getc() |
| 81 | function with stdin. |
| 82 | |
| 83 | Note SCz/2001-07-21: the current readline is not clean in its management of |
| 84 | the output. Even if we install a redisplay handler, it sometimes writes on |
| 85 | a stdout file. It is important to redirect every output produced by |
| 86 | readline, otherwise the curses window will be garbled. This is implemented |
| 87 | with a pipe that TUI reads and readline writes to. A gdb input handler |
| 88 | is created so that reading the pipe is handled automatically. |
| 89 | This will probably not work on non-Unix platforms. The best fix is |
| 90 | to make readline clean enougth so that is never write on stdout. |
| 91 | |
| 92 | Note SCz/2002-09-01: we now use more readline hooks and it seems that |
| 93 | with them we don't need the pipe anymore (verified by creating the pipe |
| 94 | and closing its end so that write causes a SIGPIPE). The old pipe code |
| 95 | is still there and can be conditionally removed by |
| 96 | #undef TUI_USE_PIPE_FOR_READLINE. */ |
| 97 | |
| 98 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ |
| 99 | #define TUI_USE_PIPE_FOR_READLINE |
| 100 | /*#undef TUI_USE_PIPE_FOR_READLINE*/ |
| 101 | |
| 102 | /* TUI output files. */ |
| 103 | static struct ui_file *tui_stdout; |
| 104 | static struct ui_file *tui_stderr; |
| 105 | static struct ui_out *tui_out; |
| 106 | |
| 107 | /* GDB output files in non-curses mode. */ |
| 108 | static struct ui_file *tui_old_stdout; |
| 109 | static struct ui_file *tui_old_stderr; |
| 110 | static struct ui_out *tui_old_uiout; |
| 111 | |
| 112 | /* Readline previous hooks. */ |
| 113 | static Function *tui_old_rl_getc_function; |
| 114 | static VFunction *tui_old_rl_redisplay_function; |
| 115 | static VFunction *tui_old_rl_prep_terminal; |
| 116 | static VFunction *tui_old_rl_deprep_terminal; |
| 117 | static int tui_old_readline_echoing_p; |
| 118 | |
| 119 | /* Readline output stream. |
| 120 | Should be removed when readline is clean. */ |
| 121 | static FILE *tui_rl_outstream; |
| 122 | static FILE *tui_old_rl_outstream; |
| 123 | #ifdef TUI_USE_PIPE_FOR_READLINE |
| 124 | static int tui_readline_pipe[2]; |
| 125 | #endif |
| 126 | |
| 127 | static unsigned int _tuiHandleResizeDuringIO (unsigned int); |
| 128 | |
| 129 | static void |
| 130 | tui_putc (char c) |
| 131 | { |
| 132 | char buf[2]; |
| 133 | |
| 134 | buf[0] = c; |
| 135 | buf[1] = 0; |
| 136 | tui_puts (buf); |
| 137 | } |
| 138 | |
| 139 | /* Print the string in the curses command window. */ |
| 140 | void |
| 141 | tui_puts (const char *string) |
| 142 | { |
| 143 | static int tui_skip_line = -1; |
| 144 | char c; |
| 145 | WINDOW *w; |
| 146 | |
| 147 | w = cmdWin->generic.handle; |
| 148 | while ((c = *string++) != 0) |
| 149 | { |
| 150 | /* Catch annotation and discard them. We need two \032 and |
| 151 | discard until a \n is seen. */ |
| 152 | if (c == '\032') |
| 153 | { |
| 154 | tui_skip_line++; |
| 155 | } |
| 156 | else if (tui_skip_line != 1) |
| 157 | { |
| 158 | tui_skip_line = -1; |
| 159 | waddch (w, c); |
| 160 | } |
| 161 | else if (c == '\n') |
| 162 | tui_skip_line = -1; |
| 163 | } |
| 164 | getyx (w, cmdWin->detail.commandInfo.curLine, |
| 165 | cmdWin->detail.commandInfo.curch); |
| 166 | cmdWin->detail.commandInfo.start_line = cmdWin->detail.commandInfo.curLine; |
| 167 | |
| 168 | /* We could defer the following. */ |
| 169 | wrefresh (w); |
| 170 | fflush (stdout); |
| 171 | } |
| 172 | |
| 173 | /* Readline callback. |
| 174 | Redisplay the command line with its prompt after readline has |
| 175 | changed the edited text. */ |
| 176 | void |
| 177 | tui_redisplay_readline (void) |
| 178 | { |
| 179 | int prev_col; |
| 180 | int height; |
| 181 | int col, line; |
| 182 | int c_pos; |
| 183 | int c_line; |
| 184 | int in; |
| 185 | WINDOW *w; |
| 186 | char *prompt; |
| 187 | int start_line; |
| 188 | |
| 189 | if (tui_current_key_mode == tui_single_key_mode) |
| 190 | prompt = ""; |
| 191 | else |
| 192 | prompt = get_prompt (); |
| 193 | |
| 194 | c_pos = -1; |
| 195 | c_line = -1; |
| 196 | w = cmdWin->generic.handle; |
| 197 | start_line = cmdWin->detail.commandInfo.start_line; |
| 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 | } |
| 224 | else |
| 225 | { |
| 226 | waddch (w, c); |
| 227 | } |
| 228 | if (c == '\n') |
| 229 | { |
| 230 | getyx (w, cmdWin->detail.commandInfo.start_line, |
| 231 | cmdWin->detail.commandInfo.curch); |
| 232 | } |
| 233 | getyx (w, line, col); |
| 234 | if (col < prev_col) |
| 235 | height++; |
| 236 | prev_col = col; |
| 237 | } |
| 238 | wclrtobot (w); |
| 239 | getyx (w, cmdWin->detail.commandInfo.start_line, |
| 240 | cmdWin->detail.commandInfo.curch); |
| 241 | if (c_line >= 0) |
| 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; |
| 248 | |
| 249 | wrefresh (w); |
| 250 | fflush(stdout); |
| 251 | } |
| 252 | |
| 253 | /* Readline callback to prepare the terminal. It is called once |
| 254 | each time we enter readline. There is nothing to do in curses mode. */ |
| 255 | static void |
| 256 | tui_prep_terminal (void) |
| 257 | { |
| 258 | } |
| 259 | |
| 260 | /* Readline callback to restore the terminal. It is called once |
| 261 | each time we leave readline. There is nothing to do in curses mode. */ |
| 262 | static void |
| 263 | tui_deprep_terminal (void) |
| 264 | { |
| 265 | } |
| 266 | |
| 267 | #ifdef TUI_USE_PIPE_FOR_READLINE |
| 268 | /* Read readline output pipe and feed the command window with it. |
| 269 | Should be removed when readline is clean. */ |
| 270 | static void |
| 271 | tui_readline_output (int code, gdb_client_data data) |
| 272 | { |
| 273 | int size; |
| 274 | char buf[256]; |
| 275 | |
| 276 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
| 277 | if (size > 0 && tui_active) |
| 278 | { |
| 279 | buf[size] = 0; |
| 280 | tui_puts (buf); |
| 281 | } |
| 282 | } |
| 283 | #endif |
| 284 | |
| 285 | /* Return the portion of PATHNAME that should be output when listing |
| 286 | possible completions. If we are hacking filename completion, we |
| 287 | are only interested in the basename, the portion following the |
| 288 | final slash. Otherwise, we return what we were passed. |
| 289 | |
| 290 | Comes from readline/complete.c */ |
| 291 | static char * |
| 292 | printable_part (pathname) |
| 293 | char *pathname; |
| 294 | { |
| 295 | char *temp; |
| 296 | |
| 297 | temp = rl_filename_completion_desired ? strrchr (pathname, '/') : (char *)NULL; |
| 298 | #if defined (__MSDOS__) |
| 299 | if (rl_filename_completion_desired && temp == 0 && isalpha (pathname[0]) && pathname[1] == ':') |
| 300 | temp = pathname + 1; |
| 301 | #endif |
| 302 | return (temp ? ++temp : pathname); |
| 303 | } |
| 304 | |
| 305 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we |
| 306 | are using it, check for and output a single character for `special' |
| 307 | filenames. Return the number of characters we output. */ |
| 308 | |
| 309 | #define PUTX(c) \ |
| 310 | do { \ |
| 311 | if (CTRL_CHAR (c)) \ |
| 312 | { \ |
| 313 | tui_puts ("^"); \ |
| 314 | tui_putc (UNCTRL (c)); \ |
| 315 | printed_len += 2; \ |
| 316 | } \ |
| 317 | else if (c == RUBOUT) \ |
| 318 | { \ |
| 319 | tui_puts ("^?"); \ |
| 320 | printed_len += 2; \ |
| 321 | } \ |
| 322 | else \ |
| 323 | { \ |
| 324 | tui_putc (c); \ |
| 325 | printed_len++; \ |
| 326 | } \ |
| 327 | } while (0) |
| 328 | |
| 329 | static int |
| 330 | print_filename (to_print, full_pathname) |
| 331 | char *to_print, *full_pathname; |
| 332 | { |
| 333 | int printed_len = 0; |
| 334 | char *s; |
| 335 | |
| 336 | for (s = to_print; *s; s++) |
| 337 | { |
| 338 | PUTX (*s); |
| 339 | } |
| 340 | return printed_len; |
| 341 | } |
| 342 | |
| 343 | /* The user must press "y" or "n". Non-zero return means "y" pressed. |
| 344 | Comes from readline/complete.c */ |
| 345 | static int |
| 346 | get_y_or_n () |
| 347 | { |
| 348 | extern int _rl_abort_internal (); |
| 349 | int c; |
| 350 | |
| 351 | for (;;) |
| 352 | { |
| 353 | c = rl_read_key (); |
| 354 | if (c == 'y' || c == 'Y' || c == ' ') |
| 355 | return (1); |
| 356 | if (c == 'n' || c == 'N' || c == RUBOUT) |
| 357 | return (0); |
| 358 | if (c == ABORT_CHAR) |
| 359 | _rl_abort_internal (); |
| 360 | beep (); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /* A convenience function for displaying a list of strings in |
| 365 | columnar format on readline's output stream. MATCHES is the list |
| 366 | of strings, in argv format, LEN is the number of strings in MATCHES, |
| 367 | and MAX is the length of the longest string in MATCHES. |
| 368 | |
| 369 | Comes from readline/complete.c and modified to write in |
| 370 | the TUI command window using tui_putc/tui_puts. */ |
| 371 | static void |
| 372 | tui_rl_display_match_list (matches, len, max) |
| 373 | char **matches; |
| 374 | int len, max; |
| 375 | { |
| 376 | typedef int QSFUNC (const void *, const void *); |
| 377 | extern int _rl_qsort_string_compare (const void*, const void*); |
| 378 | extern int _rl_print_completions_horizontally; |
| 379 | |
| 380 | int count, limit, printed_len; |
| 381 | int i, j, k, l; |
| 382 | char *temp; |
| 383 | |
| 384 | /* Screen dimension correspond to the TUI command window. */ |
| 385 | int screenwidth = cmdWin->generic.width; |
| 386 | |
| 387 | /* If there are many items, then ask the user if she really wants to |
| 388 | see them all. */ |
| 389 | if (len >= rl_completion_query_items) |
| 390 | { |
| 391 | char msg[256]; |
| 392 | |
| 393 | sprintf (msg, "\nDisplay all %d possibilities? (y or n)", len); |
| 394 | tui_puts (msg); |
| 395 | if (get_y_or_n () == 0) |
| 396 | { |
| 397 | tui_puts ("\n"); |
| 398 | return; |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | /* How many items of MAX length can we fit in the screen window? */ |
| 403 | max += 2; |
| 404 | limit = screenwidth / max; |
| 405 | if (limit != 1 && (limit * max == screenwidth)) |
| 406 | limit--; |
| 407 | |
| 408 | /* Avoid a possible floating exception. If max > screenwidth, |
| 409 | limit will be 0 and a divide-by-zero fault will result. */ |
| 410 | if (limit == 0) |
| 411 | limit = 1; |
| 412 | |
| 413 | /* How many iterations of the printing loop? */ |
| 414 | count = (len + (limit - 1)) / limit; |
| 415 | |
| 416 | /* Watch out for special case. If LEN is less than LIMIT, then |
| 417 | just do the inner printing loop. |
| 418 | 0 < len <= limit implies count = 1. */ |
| 419 | |
| 420 | /* Sort the items if they are not already sorted. */ |
| 421 | if (rl_ignore_completion_duplicates == 0) |
| 422 | qsort (matches + 1, len, sizeof (char *), |
| 423 | (QSFUNC *)_rl_qsort_string_compare); |
| 424 | |
| 425 | tui_putc ('\n'); |
| 426 | |
| 427 | if (_rl_print_completions_horizontally == 0) |
| 428 | { |
| 429 | /* Print the sorted items, up-and-down alphabetically, like ls. */ |
| 430 | for (i = 1; i <= count; i++) |
| 431 | { |
| 432 | for (j = 0, l = i; j < limit; j++) |
| 433 | { |
| 434 | if (l > len || matches[l] == 0) |
| 435 | break; |
| 436 | else |
| 437 | { |
| 438 | temp = printable_part (matches[l]); |
| 439 | printed_len = print_filename (temp, matches[l]); |
| 440 | |
| 441 | if (j + 1 < limit) |
| 442 | for (k = 0; k < max - printed_len; k++) |
| 443 | tui_putc (' '); |
| 444 | } |
| 445 | l += count; |
| 446 | } |
| 447 | tui_putc ('\n'); |
| 448 | } |
| 449 | } |
| 450 | else |
| 451 | { |
| 452 | /* Print the sorted items, across alphabetically, like ls -x. */ |
| 453 | for (i = 1; matches[i]; i++) |
| 454 | { |
| 455 | temp = printable_part (matches[i]); |
| 456 | printed_len = print_filename (temp, matches[i]); |
| 457 | /* Have we reached the end of this line? */ |
| 458 | if (matches[i+1]) |
| 459 | { |
| 460 | if (i && (limit > 1) && (i % limit) == 0) |
| 461 | tui_putc ('\n'); |
| 462 | else |
| 463 | for (k = 0; k < max - printed_len; k++) |
| 464 | tui_putc (' '); |
| 465 | } |
| 466 | } |
| 467 | tui_putc ('\n'); |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | /* Setup the IO for curses or non-curses mode. |
| 472 | - In non-curses mode, readline and gdb use the standard input and |
| 473 | standard output/error directly. |
| 474 | - In curses mode, the standard output/error is controlled by TUI |
| 475 | with the tui_stdout and tui_stderr. The output is redirected in |
| 476 | the curses command window. Several readline callbacks are installed |
| 477 | so that readline asks for its input to the curses command window |
| 478 | with wgetch(). */ |
| 479 | void |
| 480 | tui_setup_io (int mode) |
| 481 | { |
| 482 | extern int readline_echoing_p; |
| 483 | |
| 484 | if (mode) |
| 485 | { |
| 486 | /* Redirect readline to TUI. */ |
| 487 | tui_old_rl_redisplay_function = rl_redisplay_function; |
| 488 | tui_old_rl_deprep_terminal = rl_deprep_term_function; |
| 489 | tui_old_rl_prep_terminal = rl_prep_term_function; |
| 490 | tui_old_rl_getc_function = rl_getc_function; |
| 491 | tui_old_rl_outstream = rl_outstream; |
| 492 | tui_old_readline_echoing_p = readline_echoing_p; |
| 493 | rl_redisplay_function = tui_redisplay_readline; |
| 494 | rl_deprep_term_function = tui_deprep_terminal; |
| 495 | rl_prep_term_function = tui_prep_terminal; |
| 496 | rl_getc_function = tui_getc; |
| 497 | readline_echoing_p = 0; |
| 498 | rl_outstream = tui_rl_outstream; |
| 499 | rl_prompt = 0; |
| 500 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
| 501 | rl_already_prompted = 0; |
| 502 | |
| 503 | /* Keep track of previous gdb output. */ |
| 504 | tui_old_stdout = gdb_stdout; |
| 505 | tui_old_stderr = gdb_stderr; |
| 506 | tui_old_uiout = uiout; |
| 507 | |
| 508 | /* Reconfigure gdb output. */ |
| 509 | gdb_stdout = tui_stdout; |
| 510 | gdb_stderr = tui_stderr; |
| 511 | gdb_stdlog = gdb_stdout; /* for moment */ |
| 512 | gdb_stdtarg = gdb_stderr; /* for moment */ |
| 513 | uiout = tui_out; |
| 514 | |
| 515 | /* Save tty for SIGCONT. */ |
| 516 | savetty (); |
| 517 | } |
| 518 | else |
| 519 | { |
| 520 | /* Restore gdb output. */ |
| 521 | gdb_stdout = tui_old_stdout; |
| 522 | gdb_stderr = tui_old_stderr; |
| 523 | gdb_stdlog = gdb_stdout; /* for moment */ |
| 524 | gdb_stdtarg = gdb_stderr; /* for moment */ |
| 525 | uiout = tui_old_uiout; |
| 526 | |
| 527 | /* Restore readline. */ |
| 528 | rl_redisplay_function = tui_old_rl_redisplay_function; |
| 529 | rl_deprep_term_function = tui_old_rl_deprep_terminal; |
| 530 | rl_prep_term_function = tui_old_rl_prep_terminal; |
| 531 | rl_getc_function = tui_old_rl_getc_function; |
| 532 | rl_outstream = tui_old_rl_outstream; |
| 533 | rl_completion_display_matches_hook = 0; |
| 534 | readline_echoing_p = tui_old_readline_echoing_p; |
| 535 | rl_already_prompted = 1; |
| 536 | |
| 537 | /* Save tty for SIGCONT. */ |
| 538 | savetty (); |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | #ifdef SIGCONT |
| 543 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ |
| 544 | static void |
| 545 | tui_cont_sig (int sig) |
| 546 | { |
| 547 | if (tui_active) |
| 548 | { |
| 549 | /* Restore the terminal setting because another process (shell) |
| 550 | might have changed it. */ |
| 551 | resetty (); |
| 552 | |
| 553 | /* Force a refresh of the screen. */ |
| 554 | tuiRefreshAll (); |
| 555 | |
| 556 | /* Update cursor position on the screen. */ |
| 557 | wmove (cmdWin->generic.handle, |
| 558 | cmdWin->detail.commandInfo.start_line, |
| 559 | cmdWin->detail.commandInfo.curch); |
| 560 | wrefresh (cmdWin->generic.handle); |
| 561 | } |
| 562 | signal (sig, tui_cont_sig); |
| 563 | } |
| 564 | #endif |
| 565 | |
| 566 | /* Initialize the IO for gdb in curses mode. */ |
| 567 | void |
| 568 | tui_initialize_io () |
| 569 | { |
| 570 | #ifdef SIGCONT |
| 571 | signal (SIGCONT, tui_cont_sig); |
| 572 | #endif |
| 573 | |
| 574 | /* Create tui output streams. */ |
| 575 | tui_stdout = tui_fileopen (stdout); |
| 576 | tui_stderr = tui_fileopen (stderr); |
| 577 | tui_out = tui_out_new (tui_stdout); |
| 578 | |
| 579 | /* Create the default UI. It is not created because we installed |
| 580 | a init_ui_hook. */ |
| 581 | uiout = cli_out_new (gdb_stdout); |
| 582 | |
| 583 | #ifdef TUI_USE_PIPE_FOR_READLINE |
| 584 | /* Temporary solution for readline writing to stdout: |
| 585 | redirect readline output in a pipe, read that pipe and |
| 586 | output the content in the curses command window. */ |
| 587 | if (pipe (tui_readline_pipe) != 0) |
| 588 | { |
| 589 | fprintf_unfiltered (gdb_stderr, "Cannot create pipe for readline"); |
| 590 | exit (1); |
| 591 | } |
| 592 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
| 593 | if (tui_rl_outstream == 0) |
| 594 | { |
| 595 | fprintf_unfiltered (gdb_stderr, "Cannot redirect readline output"); |
| 596 | exit (1); |
| 597 | } |
| 598 | setlinebuf (tui_rl_outstream); |
| 599 | |
| 600 | #ifdef O_NONBLOCK |
| 601 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); |
| 602 | #else |
| 603 | #ifdef O_NDELAY |
| 604 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); |
| 605 | #endif |
| 606 | #endif |
| 607 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
| 608 | #else |
| 609 | tui_rl_outstream = stdout; |
| 610 | #endif |
| 611 | } |
| 612 | |
| 613 | /* Get a character from the command window. This is called from the readline |
| 614 | package. */ |
| 615 | int |
| 616 | tui_getc (FILE *fp) |
| 617 | { |
| 618 | int ch; |
| 619 | WINDOW *w; |
| 620 | |
| 621 | w = cmdWin->generic.handle; |
| 622 | |
| 623 | #ifdef TUI_USE_PIPE_FOR_READLINE |
| 624 | /* Flush readline output. */ |
| 625 | tui_readline_output (GDB_READABLE, 0); |
| 626 | #endif |
| 627 | |
| 628 | ch = wgetch (w); |
| 629 | ch = _tuiHandleResizeDuringIO (ch); |
| 630 | |
| 631 | /* The \n must be echoed because it will not be printed by readline. */ |
| 632 | if (ch == '\n') |
| 633 | { |
| 634 | /* When hitting return with an empty input, gdb executes the last |
| 635 | command. If we emit a newline, this fills up the command window |
| 636 | with empty lines with gdb prompt at beginning. Instead of that, |
| 637 | stay on the same line but provide a visual effect to show the |
| 638 | user we recognized the command. */ |
| 639 | if (rl_end == 0) |
| 640 | { |
| 641 | wmove (w, cmdWin->detail.commandInfo.curLine, 0); |
| 642 | |
| 643 | /* Clear the line. This will blink the gdb prompt since |
| 644 | it will be redrawn at the same line. */ |
| 645 | wclrtoeol (w); |
| 646 | wrefresh (w); |
| 647 | napms (20); |
| 648 | } |
| 649 | else |
| 650 | { |
| 651 | wmove (w, cmdWin->detail.commandInfo.curLine, |
| 652 | cmdWin->detail.commandInfo.curch); |
| 653 | waddch (w, ch); |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | if (m_isCommandChar (ch)) |
| 658 | { /* Handle prev/next/up/down here */ |
| 659 | ch = tuiDispatchCtrlChar (ch); |
| 660 | } |
| 661 | |
| 662 | if (ch == '\n' || ch == '\r' || ch == '\f') |
| 663 | cmdWin->detail.commandInfo.curch = 0; |
| 664 | #if 0 |
| 665 | else |
| 666 | tuiIncrCommandCharCountBy (1); |
| 667 | #endif |
| 668 | if (ch == KEY_BACKSPACE) |
| 669 | return '\b'; |
| 670 | |
| 671 | return ch; |
| 672 | } |
| 673 | |
| 674 | |
| 675 | /* Cleanup when a resize has occured. |
| 676 | Returns the character that must be processed. */ |
| 677 | static unsigned int |
| 678 | _tuiHandleResizeDuringIO (unsigned int originalCh) |
| 679 | { |
| 680 | if (tuiWinResized ()) |
| 681 | { |
| 682 | tuiRefreshAll (); |
| 683 | dont_repeat (); |
| 684 | tuiSetWinResizedTo (FALSE); |
| 685 | return '\n'; |
| 686 | } |
| 687 | else |
| 688 | return originalCh; |
| 689 | } |