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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 | } |