| 1 | /* |
| 2 | * Copyright (c) 1988 Mark Nudleman |
| 3 | * Copyright (c) 1988 Regents of the University of California. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * This code is derived from software contributed to Berkeley by |
| 7 | * Mark Nudleman. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms are permitted |
| 10 | * provided that the above copyright notice and this paragraph are |
| 11 | * duplicated in all such forms and that any documentation, |
| 12 | * advertising materials, and other materials related to such |
| 13 | * distribution and use acknowledge that the software was developed |
| 14 | * by the University of California, Berkeley. The name of the |
| 15 | * University may not be used to endorse or promote products derived |
| 16 | * from this software without specific prior written permission. |
| 17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 19 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 20 | */ |
| 21 | |
| 22 | #ifndef lint |
| 23 | static char sccsid[] = "@(#)command.c 5.1 (Berkeley) %G%"; |
| 24 | #endif /* not lint */ |
| 25 | |
| 26 | /* |
| 27 | * User-level command processor. |
| 28 | */ |
| 29 | |
| 30 | #include "less.h" |
| 31 | #include "position.h" |
| 32 | #include "cmd.h" |
| 33 | |
| 34 | #define NO_MCA 0 |
| 35 | #define MCA_DONE 1 |
| 36 | #define MCA_MORE 2 |
| 37 | |
| 38 | extern int erase_char, kill_char; |
| 39 | extern int ispipe; |
| 40 | extern int sigs; |
| 41 | extern int quit_at_eof; |
| 42 | extern int hit_eof; |
| 43 | extern int sc_width; |
| 44 | extern int sc_height; |
| 45 | extern int sc_window; |
| 46 | extern int curr_ac; |
| 47 | extern int ac; |
| 48 | extern int quitting; |
| 49 | extern int scroll; |
| 50 | extern char *first_cmd; |
| 51 | extern char *every_first_cmd; |
| 52 | extern char version[]; |
| 53 | extern char *current_file; |
| 54 | #if EDITOR |
| 55 | extern char *editor; |
| 56 | #endif |
| 57 | extern int screen_trashed; /* The screen has been overwritten */ |
| 58 | |
| 59 | static char cmdbuf[120]; /* Buffer for holding a multi-char command */ |
| 60 | #if SHELL_ESCAPE |
| 61 | static char *shellcmd = NULL; /* For holding last shell command for "!!" */ |
| 62 | #endif |
| 63 | static char *cp; /* Pointer into cmdbuf */ |
| 64 | static int cmd_col; /* Current column of the multi-char command */ |
| 65 | static int mca; /* The multicharacter command (action) */ |
| 66 | static int last_mca; /* The previous mca */ |
| 67 | static int number; /* The number typed by the user */ |
| 68 | static int wsearch; /* Search for matches (1) or non-matches (0) */ |
| 69 | |
| 70 | /* |
| 71 | * Reset command buffer (to empty). |
| 72 | */ |
| 73 | cmd_reset() |
| 74 | { |
| 75 | cp = cmdbuf; |
| 76 | } |
| 77 | |
| 78 | /* |
| 79 | * Backspace in command buffer. |
| 80 | */ |
| 81 | static int |
| 82 | cmd_erase() |
| 83 | { |
| 84 | if (cp == cmdbuf) |
| 85 | /* |
| 86 | * Backspace past beginning of the string: |
| 87 | * this usually means abort the command. |
| 88 | */ |
| 89 | return (1); |
| 90 | |
| 91 | if (control_char(*--cp)) |
| 92 | { |
| 93 | /* |
| 94 | * Erase an extra character, for the carat. |
| 95 | */ |
| 96 | backspace(); |
| 97 | cmd_col--; |
| 98 | } |
| 99 | backspace(); |
| 100 | cmd_col--; |
| 101 | return (0); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Set up the display to start a new multi-character command. |
| 106 | */ |
| 107 | start_mca(action, prompt) |
| 108 | int action; |
| 109 | char *prompt; |
| 110 | { |
| 111 | lower_left(); |
| 112 | clear_eol(); |
| 113 | putstr(prompt); |
| 114 | cmd_col = strlen(prompt); |
| 115 | mca = action; |
| 116 | } |
| 117 | |
| 118 | /* |
| 119 | * Process a single character of a multi-character command, such as |
| 120 | * a number, or the pattern of a search command. |
| 121 | */ |
| 122 | static int |
| 123 | cmd_char(c) |
| 124 | int c; |
| 125 | { |
| 126 | if (c == erase_char) |
| 127 | { |
| 128 | if (cmd_erase()) |
| 129 | return (1); |
| 130 | } else if (c == kill_char) |
| 131 | { |
| 132 | /* {{ Could do this faster, but who cares? }} */ |
| 133 | while (cmd_erase() == 0) |
| 134 | ; |
| 135 | } else if (cp >= &cmdbuf[sizeof(cmdbuf)-1]) |
| 136 | { |
| 137 | /* |
| 138 | * No room in the command buffer. |
| 139 | */ |
| 140 | bell(); |
| 141 | } else if (cmd_col >= sc_width-3) |
| 142 | { |
| 143 | /* |
| 144 | * No room on the screen. |
| 145 | * {{ Could get fancy here; maybe shift the displayed |
| 146 | * line and make room for more chars, like ksh. }} |
| 147 | */ |
| 148 | bell(); |
| 149 | } else |
| 150 | { |
| 151 | /* |
| 152 | * Append the character to the string. |
| 153 | */ |
| 154 | *cp++ = c; |
| 155 | if (control_char(c)) |
| 156 | { |
| 157 | putchr('^'); |
| 158 | cmd_col++; |
| 159 | c = carat_char(c); |
| 160 | } |
| 161 | putchr(c); |
| 162 | cmd_col++; |
| 163 | } |
| 164 | return (0); |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Return the number currently in the command buffer. |
| 169 | */ |
| 170 | static int |
| 171 | cmd_int() |
| 172 | { |
| 173 | *cp = '\0'; |
| 174 | cp = cmdbuf; |
| 175 | return (atoi(cmdbuf)); |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * Move the cursor to lower left before executing a command. |
| 180 | * This looks nicer if the command takes a long time before |
| 181 | * updating the screen. |
| 182 | */ |
| 183 | static void |
| 184 | cmd_exec() |
| 185 | { |
| 186 | lower_left(); |
| 187 | flush(); |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Display the appropriate prompt. |
| 192 | */ |
| 193 | static void |
| 194 | prompt() |
| 195 | { |
| 196 | register char *p; |
| 197 | |
| 198 | if (first_cmd != NULL && *first_cmd != '\0') |
| 199 | { |
| 200 | /* |
| 201 | * No prompt necessary if commands are from first_cmd |
| 202 | * rather than from the user. |
| 203 | */ |
| 204 | return; |
| 205 | } |
| 206 | |
| 207 | /* |
| 208 | * If nothing is displayed yet, display starting from line 1. |
| 209 | */ |
| 210 | if (position(TOP) == NULL_POSITION) |
| 211 | jump_back(1); |
| 212 | else if (screen_trashed) |
| 213 | repaint(); |
| 214 | |
| 215 | /* |
| 216 | * If the -E flag is set and we've hit EOF on the last file, quit. |
| 217 | */ |
| 218 | if (quit_at_eof == 2 && hit_eof && curr_ac + 1 >= ac) |
| 219 | quit(); |
| 220 | |
| 221 | /* |
| 222 | * Select the proper prompt and display it. |
| 223 | */ |
| 224 | lower_left(); |
| 225 | clear_eol(); |
| 226 | p = pr_string(); |
| 227 | if (p == NULL) |
| 228 | putchr(':'); |
| 229 | else |
| 230 | { |
| 231 | so_enter(); |
| 232 | putstr(p); |
| 233 | so_exit(); |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * Get command character. |
| 239 | * The character normally comes from the keyboard, |
| 240 | * but may come from the "first_cmd" string. |
| 241 | */ |
| 242 | static int |
| 243 | getcc() |
| 244 | { |
| 245 | if (first_cmd == NULL) |
| 246 | return (getchr()); |
| 247 | |
| 248 | if (*first_cmd == '\0') |
| 249 | { |
| 250 | /* |
| 251 | * Reached end of first_cmd input. |
| 252 | */ |
| 253 | first_cmd = NULL; |
| 254 | if (cp > cmdbuf && position(TOP) == NULL_POSITION) |
| 255 | { |
| 256 | /* |
| 257 | * Command is incomplete, so try to complete it. |
| 258 | * There are only two cases: |
| 259 | * 1. We have "/string" but no newline. Add the \n. |
| 260 | * 2. We have a number but no command. Treat as #g. |
| 261 | * (This is all pretty hokey.) |
| 262 | */ |
| 263 | if (mca != A_DIGIT) |
| 264 | /* Not a number; must be search string */ |
| 265 | return ('\n'); |
| 266 | else |
| 267 | /* A number; append a 'g' */ |
| 268 | return ('g'); |
| 269 | } |
| 270 | return (getchr()); |
| 271 | } |
| 272 | return (*first_cmd++); |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * Execute a multicharacter command. |
| 277 | */ |
| 278 | static void |
| 279 | exec_mca() |
| 280 | { |
| 281 | register char *p; |
| 282 | register int n; |
| 283 | |
| 284 | *cp = '\0'; |
| 285 | cmd_exec(); |
| 286 | switch (mca) |
| 287 | { |
| 288 | case A_F_SEARCH: |
| 289 | search(1, cmdbuf, number, wsearch); |
| 290 | break; |
| 291 | case A_B_SEARCH: |
| 292 | search(0, cmdbuf, number, wsearch); |
| 293 | break; |
| 294 | case A_FIRSTCMD: |
| 295 | /* |
| 296 | * Skip leading spaces or + signs in the string. |
| 297 | */ |
| 298 | for (p = cmdbuf; *p == '+' || *p == ' '; p++) |
| 299 | ; |
| 300 | if (every_first_cmd != NULL) |
| 301 | free(every_first_cmd); |
| 302 | if (*p == '\0') |
| 303 | every_first_cmd = NULL; |
| 304 | else |
| 305 | every_first_cmd = save(p); |
| 306 | break; |
| 307 | case A_TOGGLE_OPTION: |
| 308 | toggle_option(cmdbuf, 1); |
| 309 | break; |
| 310 | case A_EXAMINE: |
| 311 | /* |
| 312 | * Ignore leading spaces in the filename. |
| 313 | */ |
| 314 | for (p = cmdbuf; *p == ' '; p++) |
| 315 | ; |
| 316 | edit(glob(p)); |
| 317 | break; |
| 318 | #if SHELL_ESCAPE |
| 319 | case A_SHELL: |
| 320 | /* |
| 321 | * !! just uses whatever is in shellcmd. |
| 322 | * Otherwise, copy cmdbuf to shellcmd, |
| 323 | * replacing any '%' with the current |
| 324 | * file name. |
| 325 | */ |
| 326 | if (*cmdbuf != '!') |
| 327 | { |
| 328 | register char *fr, *to; |
| 329 | |
| 330 | /* |
| 331 | * Make one pass to see how big a buffer we |
| 332 | * need to allocate for the expanded shell cmd. |
| 333 | */ |
| 334 | for (fr = cmdbuf; *fr != '\0'; fr++) |
| 335 | if (*fr == '%') |
| 336 | n += strlen(current_file); |
| 337 | else |
| 338 | n++; |
| 339 | |
| 340 | if (shellcmd != NULL) |
| 341 | free(shellcmd); |
| 342 | shellcmd = calloc(n+1, sizeof(char)); |
| 343 | if (shellcmd == NULL) |
| 344 | { |
| 345 | error("cannot allocate memory"); |
| 346 | break; |
| 347 | } |
| 348 | |
| 349 | /* |
| 350 | * Now copy the shell cmd, expanding any "%" |
| 351 | * into the current filename. |
| 352 | */ |
| 353 | to = shellcmd; |
| 354 | for (fr = cmdbuf; *fr != '\0'; fr++) |
| 355 | { |
| 356 | if (*fr != '%') |
| 357 | *to++ = *fr; |
| 358 | else |
| 359 | { |
| 360 | strcpy(to, current_file); |
| 361 | to += strlen(to); |
| 362 | } |
| 363 | } |
| 364 | *to = '\0'; |
| 365 | } |
| 366 | |
| 367 | if (shellcmd == NULL) |
| 368 | lsystem(""); |
| 369 | else |
| 370 | lsystem(shellcmd); |
| 371 | error("!done"); |
| 372 | break; |
| 373 | #endif |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Add a character to a multi-character command. |
| 379 | */ |
| 380 | static int |
| 381 | mca_char(c) |
| 382 | int c; |
| 383 | { |
| 384 | switch (mca) |
| 385 | { |
| 386 | case 0: |
| 387 | /* |
| 388 | * Not in a multicharacter command. |
| 389 | */ |
| 390 | return (NO_MCA); |
| 391 | |
| 392 | case A_PREFIX: |
| 393 | /* |
| 394 | * In the prefix of a command. |
| 395 | */ |
| 396 | return (NO_MCA); |
| 397 | |
| 398 | case A_DIGIT: |
| 399 | /* |
| 400 | * Entering digits of a number. |
| 401 | * Terminated by a non-digit. |
| 402 | */ |
| 403 | if ((c < '0' || c > '9') && |
| 404 | c != erase_char && c != kill_char) |
| 405 | { |
| 406 | /* |
| 407 | * Not part of the number. |
| 408 | * Treat as a normal command character. |
| 409 | */ |
| 410 | number = cmd_int(); |
| 411 | mca = 0; |
| 412 | return (NO_MCA); |
| 413 | } |
| 414 | break; |
| 415 | |
| 416 | case A_TOGGLE_OPTION: |
| 417 | /* |
| 418 | * Special case for the TOGGLE_OPTION command. |
| 419 | * if the option letter which was entered is a |
| 420 | * single-char option, execute the command immediately, |
| 421 | * so he doesn't have to hit RETURN. |
| 422 | */ |
| 423 | if (cp == cmdbuf && c != erase_char && c != kill_char && |
| 424 | single_char_option(c)) |
| 425 | { |
| 426 | cmdbuf[0] = c; |
| 427 | cmdbuf[1] = '\0'; |
| 428 | toggle_option(cmdbuf, 1); |
| 429 | return (MCA_DONE); |
| 430 | } |
| 431 | break; |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * Any other multicharacter command |
| 436 | * is terminated by a newline. |
| 437 | */ |
| 438 | if (c == '\n' || c == '\r') |
| 439 | { |
| 440 | /* |
| 441 | * Execute the command. |
| 442 | */ |
| 443 | exec_mca(); |
| 444 | return (MCA_DONE); |
| 445 | } |
| 446 | /* |
| 447 | * Append the char to the command buffer. |
| 448 | */ |
| 449 | if (cmd_char(c)) |
| 450 | /* |
| 451 | * Abort the multi-char command. |
| 452 | */ |
| 453 | return (MCA_DONE); |
| 454 | /* |
| 455 | * Need another character. |
| 456 | */ |
| 457 | return (MCA_MORE); |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * Main command processor. |
| 462 | * Accept and execute commands until a quit command, then return. |
| 463 | */ |
| 464 | public void |
| 465 | commands() |
| 466 | { |
| 467 | register int c; |
| 468 | register int action; |
| 469 | |
| 470 | last_mca = 0; |
| 471 | scroll = (sc_height + 1) / 2; |
| 472 | |
| 473 | for (;;) |
| 474 | { |
| 475 | mca = 0; |
| 476 | number = 0; |
| 477 | |
| 478 | /* |
| 479 | * See if any signals need processing. |
| 480 | */ |
| 481 | if (sigs) |
| 482 | { |
| 483 | psignals(); |
| 484 | if (quitting) |
| 485 | quit(); |
| 486 | } |
| 487 | |
| 488 | /* |
| 489 | * Display prompt and accept a character. |
| 490 | */ |
| 491 | cmd_reset(); |
| 492 | prompt(); |
| 493 | noprefix(); |
| 494 | c = getcc(); |
| 495 | |
| 496 | again: |
| 497 | if (sigs) |
| 498 | continue; |
| 499 | |
| 500 | /* |
| 501 | * If we are in a multicharacter command, call mca_char. |
| 502 | * Otherwise we call cmd_decode to determine the |
| 503 | * action to be performed. |
| 504 | */ |
| 505 | if (mca) |
| 506 | switch (mca_char(c)) |
| 507 | { |
| 508 | case MCA_MORE: |
| 509 | /* |
| 510 | * Need another character. |
| 511 | */ |
| 512 | c = getcc(); |
| 513 | goto again; |
| 514 | case MCA_DONE: |
| 515 | /* |
| 516 | * Command has been handled by mca_char. |
| 517 | * Start clean with a prompt. |
| 518 | */ |
| 519 | continue; |
| 520 | case NO_MCA: |
| 521 | /* |
| 522 | * Not a multi-char command |
| 523 | * (at least, not anymore). |
| 524 | */ |
| 525 | break; |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Decode the command character and decide what to do. |
| 530 | */ |
| 531 | switch (action = cmd_decode(c)) |
| 532 | { |
| 533 | case A_DIGIT: |
| 534 | /* |
| 535 | * First digit of a number. |
| 536 | */ |
| 537 | start_mca(A_DIGIT, ":"); |
| 538 | goto again; |
| 539 | |
| 540 | case A_F_SCREEN: |
| 541 | /* |
| 542 | * Forward one screen. |
| 543 | */ |
| 544 | if (number <= 0) |
| 545 | number = sc_window; |
| 546 | if (number <= 0) |
| 547 | number = sc_height - 1; |
| 548 | cmd_exec(); |
| 549 | forward(number, 1); |
| 550 | break; |
| 551 | |
| 552 | case A_B_SCREEN: |
| 553 | /* |
| 554 | * Backward one screen. |
| 555 | */ |
| 556 | if (number <= 0) |
| 557 | number = sc_window; |
| 558 | if (number <= 0) |
| 559 | number = sc_height - 1; |
| 560 | cmd_exec(); |
| 561 | backward(number, 1); |
| 562 | break; |
| 563 | |
| 564 | case A_F_LINE: |
| 565 | /* |
| 566 | * Forward N (default 1) line. |
| 567 | */ |
| 568 | if (number <= 0) |
| 569 | number = 1; |
| 570 | cmd_exec(); |
| 571 | forward(number, 0); |
| 572 | break; |
| 573 | |
| 574 | case A_B_LINE: |
| 575 | /* |
| 576 | * Backward N (default 1) line. |
| 577 | */ |
| 578 | if (number <= 0) |
| 579 | number = 1; |
| 580 | cmd_exec(); |
| 581 | backward(number, 0); |
| 582 | break; |
| 583 | |
| 584 | case A_F_SCROLL: |
| 585 | /* |
| 586 | * Forward N lines |
| 587 | * (default same as last 'd' or 'u' command). |
| 588 | */ |
| 589 | if (number > 0) |
| 590 | scroll = number; |
| 591 | cmd_exec(); |
| 592 | forward(scroll, 0); |
| 593 | break; |
| 594 | |
| 595 | case A_B_SCROLL: |
| 596 | /* |
| 597 | * Forward N lines |
| 598 | * (default same as last 'd' or 'u' command). |
| 599 | */ |
| 600 | if (number > 0) |
| 601 | scroll = number; |
| 602 | cmd_exec(); |
| 603 | backward(scroll, 0); |
| 604 | break; |
| 605 | |
| 606 | case A_FREPAINT: |
| 607 | /* |
| 608 | * Flush buffers, then repaint screen. |
| 609 | * Don't flush the buffers on a pipe! |
| 610 | */ |
| 611 | if (!ispipe) |
| 612 | { |
| 613 | ch_init(0, 0); |
| 614 | clr_linenum(); |
| 615 | } |
| 616 | /* FALLTHRU */ |
| 617 | case A_REPAINT: |
| 618 | /* |
| 619 | * Repaint screen. |
| 620 | */ |
| 621 | cmd_exec(); |
| 622 | repaint(); |
| 623 | break; |
| 624 | |
| 625 | case A_GOLINE: |
| 626 | /* |
| 627 | * Go to line N, default beginning of file. |
| 628 | */ |
| 629 | if (number <= 0) |
| 630 | number = 1; |
| 631 | cmd_exec(); |
| 632 | jump_back(number); |
| 633 | break; |
| 634 | |
| 635 | case A_PERCENT: |
| 636 | /* |
| 637 | * Go to a specified percentage into the file. |
| 638 | */ |
| 639 | if (number < 0) |
| 640 | number = 0; |
| 641 | if (number > 100) |
| 642 | number = 100; |
| 643 | cmd_exec(); |
| 644 | jump_percent(number); |
| 645 | break; |
| 646 | |
| 647 | case A_GOEND: |
| 648 | /* |
| 649 | * Go to line N, default end of file. |
| 650 | */ |
| 651 | cmd_exec(); |
| 652 | if (number <= 0) |
| 653 | jump_forw(); |
| 654 | else |
| 655 | jump_back(number); |
| 656 | break; |
| 657 | |
| 658 | case A_STAT: |
| 659 | /* |
| 660 | * Print file name, etc. |
| 661 | */ |
| 662 | cmd_exec(); |
| 663 | error(eq_message()); |
| 664 | break; |
| 665 | |
| 666 | case A_VERSION: |
| 667 | /* |
| 668 | * Print version number, without the "@(#)". |
| 669 | */ |
| 670 | cmd_exec(); |
| 671 | error(version+4); |
| 672 | break; |
| 673 | |
| 674 | case A_QUIT: |
| 675 | /* |
| 676 | * Exit. |
| 677 | */ |
| 678 | quit(); |
| 679 | |
| 680 | case A_F_SEARCH: |
| 681 | case A_B_SEARCH: |
| 682 | /* |
| 683 | * Search for a pattern. |
| 684 | * Accept chars of the pattern until \n. |
| 685 | */ |
| 686 | if (number <= 0) |
| 687 | number = 1; |
| 688 | start_mca(action, (action==A_F_SEARCH) ? "/" : "?"); |
| 689 | last_mca = mca; |
| 690 | wsearch = 1; |
| 691 | c = getcc(); |
| 692 | if (c == '!') |
| 693 | { |
| 694 | /* |
| 695 | * Invert the sense of the search. |
| 696 | * Set wsearch to 0 and get a new |
| 697 | * character for the start of the pattern. |
| 698 | */ |
| 699 | start_mca(action, |
| 700 | (action==A_F_SEARCH) ? "!/" : "!?"); |
| 701 | wsearch = 0; |
| 702 | c = getcc(); |
| 703 | } |
| 704 | goto again; |
| 705 | |
| 706 | case A_AGAIN_SEARCH: |
| 707 | /* |
| 708 | * Repeat previous search. |
| 709 | */ |
| 710 | if (number <= 0) |
| 711 | number = 1; |
| 712 | if (wsearch) |
| 713 | start_mca(last_mca, |
| 714 | (last_mca==A_F_SEARCH) ? "/" : "?"); |
| 715 | else |
| 716 | start_mca(last_mca, |
| 717 | (last_mca==A_F_SEARCH) ? "!/" : "!?"); |
| 718 | cmd_exec(); |
| 719 | search(mca==A_F_SEARCH, (char *)NULL, number, wsearch); |
| 720 | break; |
| 721 | |
| 722 | case A_HELP: |
| 723 | /* |
| 724 | * Help. |
| 725 | */ |
| 726 | lower_left(); |
| 727 | clear_eol(); |
| 728 | putstr("help"); |
| 729 | cmd_exec(); |
| 730 | help(); |
| 731 | break; |
| 732 | |
| 733 | case A_EXAMINE: |
| 734 | /* |
| 735 | * Edit a new file. Get the filename. |
| 736 | */ |
| 737 | cmd_reset(); |
| 738 | start_mca(A_EXAMINE, "Examine: "); |
| 739 | c = getcc(); |
| 740 | goto again; |
| 741 | |
| 742 | case A_VISUAL: |
| 743 | /* |
| 744 | * Invoke an editor on the input file. |
| 745 | */ |
| 746 | #if EDITOR |
| 747 | if (ispipe) |
| 748 | { |
| 749 | error("Cannot edit standard input"); |
| 750 | break; |
| 751 | } |
| 752 | /* |
| 753 | * Try to pass the line number to the editor. |
| 754 | */ |
| 755 | cmd_exec(); |
| 756 | c = currline(MIDDLE); |
| 757 | if (c == 0) |
| 758 | sprintf(cmdbuf, "%s %s", |
| 759 | editor, current_file); |
| 760 | else |
| 761 | sprintf(cmdbuf, "%s +%d %s", |
| 762 | editor, c, current_file); |
| 763 | lsystem(cmdbuf); |
| 764 | ch_init(0, 0); |
| 765 | clr_linenum(); |
| 766 | break; |
| 767 | #else |
| 768 | error("Command not available"); |
| 769 | break; |
| 770 | #endif |
| 771 | |
| 772 | case A_NEXT_FILE: |
| 773 | /* |
| 774 | * Examine next file. |
| 775 | */ |
| 776 | if (number <= 0) |
| 777 | number = 1; |
| 778 | next_file(number); |
| 779 | break; |
| 780 | |
| 781 | case A_PREV_FILE: |
| 782 | /* |
| 783 | * Examine previous file. |
| 784 | */ |
| 785 | if (number <= 0) |
| 786 | number = 1; |
| 787 | prev_file(number); |
| 788 | break; |
| 789 | |
| 790 | case A_TOGGLE_OPTION: |
| 791 | /* |
| 792 | * Toggle a flag setting. |
| 793 | */ |
| 794 | cmd_reset(); |
| 795 | start_mca(A_TOGGLE_OPTION, "-"); |
| 796 | c = getcc(); |
| 797 | goto again; |
| 798 | |
| 799 | case A_DISP_OPTION: |
| 800 | /* |
| 801 | * Report a flag setting. |
| 802 | */ |
| 803 | cmd_reset(); |
| 804 | start_mca(A_DISP_OPTION, "_"); |
| 805 | c = getcc(); |
| 806 | if (c == erase_char || c == kill_char) |
| 807 | break; |
| 808 | cmdbuf[0] = c; |
| 809 | cmdbuf[1] = '\0'; |
| 810 | toggle_option(cmdbuf, 0); |
| 811 | break; |
| 812 | |
| 813 | case A_FIRSTCMD: |
| 814 | /* |
| 815 | * Set an initial command for new files. |
| 816 | */ |
| 817 | cmd_reset(); |
| 818 | start_mca(A_FIRSTCMD, "+"); |
| 819 | c = getcc(); |
| 820 | goto again; |
| 821 | |
| 822 | case A_SHELL: |
| 823 | /* |
| 824 | * Shell escape. |
| 825 | */ |
| 826 | #if SHELL_ESCAPE |
| 827 | cmd_reset(); |
| 828 | start_mca(A_SHELL, "!"); |
| 829 | c = getcc(); |
| 830 | goto again; |
| 831 | #else |
| 832 | error("Command not available"); |
| 833 | break; |
| 834 | #endif |
| 835 | |
| 836 | case A_SETMARK: |
| 837 | /* |
| 838 | * Set a mark. |
| 839 | */ |
| 840 | lower_left(); |
| 841 | clear_eol(); |
| 842 | start_mca(A_SETMARK, "mark: "); |
| 843 | c = getcc(); |
| 844 | if (c == erase_char || c == kill_char) |
| 845 | break; |
| 846 | setmark(c); |
| 847 | break; |
| 848 | |
| 849 | case A_GOMARK: |
| 850 | /* |
| 851 | * Go to a mark. |
| 852 | */ |
| 853 | lower_left(); |
| 854 | clear_eol(); |
| 855 | start_mca(A_GOMARK, "goto mark: "); |
| 856 | c = getcc(); |
| 857 | if (c == erase_char || c == kill_char) |
| 858 | break; |
| 859 | gomark(c); |
| 860 | break; |
| 861 | |
| 862 | case A_PREFIX: |
| 863 | /* |
| 864 | * The command is incomplete (more chars are needed). |
| 865 | * Display the current char so the user knows |
| 866 | * what's going on and get another character. |
| 867 | */ |
| 868 | if (mca != A_PREFIX) |
| 869 | start_mca(A_PREFIX, "& "); |
| 870 | if (control_char(c)) |
| 871 | { |
| 872 | putchr('^'); |
| 873 | c = carat_char(c); |
| 874 | } |
| 875 | putchr(c); |
| 876 | c = getcc(); |
| 877 | goto again; |
| 878 | |
| 879 | default: |
| 880 | bell(); |
| 881 | break; |
| 882 | } |
| 883 | } |
| 884 | } |