Commit | Line | Data |
---|---|---|
7c4625ef | 1 | /* Copyright (c) 1980 Regents of the University of California */ |
b41bbcb5 | 2 | static char *sccsid = "@(#)ex_vops2.c 5.1 %G%"; |
09035cec MH |
3 | #include "ex.h" |
4 | #include "ex_tty.h" | |
5 | #include "ex_vis.h" | |
6 | ||
7 | /* | |
8 | * Low level routines for operations sequences, | |
9 | * and mostly, insert mode (and a subroutine | |
10 | * to read an input line, including in the echo area.) | |
11 | */ | |
12 | char *vUA1, *vUA2; | |
13 | char *vUD1, *vUD2; | |
14 | ||
15 | /* | |
16 | * Obleeperate characters in hardcopy | |
17 | * open with \'s. | |
18 | */ | |
19 | bleep(i, cp) | |
20 | register int i; | |
21 | char *cp; | |
22 | { | |
23 | ||
24 | i -= column(cp); | |
25 | do | |
26 | putchar('\\' | QUOTE); | |
27 | while (--i >= 0); | |
28 | rubble = 1; | |
29 | } | |
30 | ||
31 | /* | |
32 | * Common code for middle part of delete | |
33 | * and change operating on parts of lines. | |
34 | */ | |
35 | vdcMID() | |
36 | { | |
37 | register char *cp; | |
38 | ||
39 | squish(); | |
40 | setLAST(); | |
887e3e0d MH |
41 | if (FIXUNDO) |
42 | vundkind = VCHNG, CP(vutmp, linebuf); | |
09035cec MH |
43 | if (wcursor < cursor) |
44 | cp = wcursor, wcursor = cursor, cursor = cp; | |
45 | vUD1 = vUA1 = vUA2 = cursor; vUD2 = wcursor; | |
46 | return (column(wcursor - 1)); | |
47 | } | |
48 | ||
49 | /* | |
50 | * Take text from linebuf and stick it | |
51 | * in the VBSIZE buffer BUF. Used to save | |
52 | * deleted text of part of line. | |
53 | */ | |
54 | takeout(BUF) | |
55 | char *BUF; | |
56 | { | |
57 | register char *cp; | |
58 | ||
59 | if (wcursor < linebuf) | |
60 | wcursor = linebuf; | |
61 | if (cursor == wcursor) { | |
62 | beep(); | |
63 | return; | |
64 | } | |
65 | if (wcursor < cursor) { | |
66 | cp = wcursor; | |
67 | wcursor = cursor; | |
68 | cursor = cp; | |
69 | } | |
70 | setBUF(BUF); | |
71 | if ((BUF[0] & (QUOTE|TRIM)) == OVERBUF) | |
72 | beep(); | |
73 | } | |
74 | ||
75 | /* | |
76 | * Are we at the end of the printed representation of the | |
77 | * line? Used internally in hardcopy open. | |
78 | */ | |
79 | ateopr() | |
80 | { | |
81 | register int i, c; | |
82 | register char *cp = vtube[destline] + destcol; | |
83 | ||
84 | for (i = WCOLS - destcol; i > 0; i--) { | |
85 | c = *cp++; | |
86 | if (c == 0) | |
87 | return (1); | |
88 | if (c != ' ' && (c & QUOTE) == 0) | |
89 | return (0); | |
90 | } | |
91 | return (1); | |
92 | } | |
93 | ||
94 | /* | |
95 | * Append. | |
96 | * | |
97 | * This routine handles the top level append, doing work | |
98 | * as each new line comes in, and arranging repeatability. | |
99 | * It also handles append with repeat counts, and calculation | |
100 | * of autoindents for new lines. | |
101 | */ | |
102 | bool vaifirst; | |
103 | bool gobbled; | |
104 | char *ogcursor; | |
105 | ||
106 | vappend(ch, cnt, indent) | |
107 | char ch; | |
108 | int cnt, indent; | |
109 | { | |
110 | register int i; | |
111 | register char *gcursor; | |
112 | bool escape; | |
113 | int repcnt; | |
114 | short oldhold = hold; | |
115 | ||
116 | /* | |
117 | * Before a move in hardopen when the line is dirty | |
118 | * or we are in the middle of the printed representation, | |
119 | * we retype the line to the left of the cursor so the | |
120 | * insert looks clean. | |
121 | */ | |
122 | if (ch != 'o' && state == HARDOPEN && (rubble || !ateopr())) { | |
123 | rubble = 1; | |
124 | gcursor = cursor; | |
125 | i = *gcursor; | |
126 | *gcursor = ' '; | |
127 | wcursor = gcursor; | |
128 | vmove(); | |
129 | *gcursor = i; | |
130 | } | |
131 | vaifirst = indent == 0; | |
132 | ||
133 | /* | |
134 | * Handle replace character by (eventually) | |
135 | * limiting the number of input characters allowed | |
136 | * in the vgetline routine. | |
137 | */ | |
138 | if (ch == 'r') | |
139 | repcnt = 2; | |
140 | else | |
141 | repcnt = 0; | |
142 | ||
143 | /* | |
144 | * If an autoindent is specified, then | |
145 | * generate a mixture of blanks to tabs to implement | |
146 | * it and place the cursor after the indent. | |
147 | * Text read by the vgetline routine will be placed in genbuf, | |
148 | * so the indent is generated there. | |
149 | */ | |
150 | if (value(AUTOINDENT) && indent != 0) { | |
151 | gcursor = genindent(indent); | |
152 | *gcursor = 0; | |
153 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
154 | } else { | |
155 | gcursor = genbuf; | |
156 | *gcursor = 0; | |
157 | if (ch == 'o') | |
158 | vfixcurs(); | |
159 | } | |
160 | ||
161 | /* | |
162 | * Prepare for undo. Pointers delimit inserted portion of line. | |
163 | */ | |
164 | vUA1 = vUA2 = cursor; | |
165 | ||
166 | /* | |
167 | * If we are not in a repeated command and a ^@ comes in | |
168 | * then this means the previous inserted text. | |
169 | * If there is none or it was too long to be saved, | |
170 | * then beep() and also arrange to undo any damage done | |
171 | * so far (e.g. if we are a change.) | |
172 | */ | |
173 | if ((vglobp && *vglobp == 0) || peekbr()) { | |
174 | if ((INS[0] & (QUOTE|TRIM)) == OVERBUF) { | |
175 | beep(); | |
176 | if (!splitw) | |
177 | ungetkey('u'); | |
178 | doomed = 0; | |
179 | hold = oldhold; | |
180 | return; | |
181 | } | |
182 | /* | |
183 | * Unread input from INS. | |
184 | * An escape will be generated at end of string. | |
185 | * Hold off n^^2 type update on dumb terminals. | |
186 | */ | |
187 | vglobp = INS; | |
188 | hold |= HOLDQIK; | |
189 | } else if (vglobp == 0) | |
190 | /* | |
191 | * Not a repeated command, get | |
192 | * a new inserted text for repeat. | |
193 | */ | |
194 | INS[0] = 0; | |
195 | ||
196 | /* | |
197 | * For wrapmargin to hack away second space after a '.' | |
198 | * when the first space caused a line break we keep | |
199 | * track that this happened in gobblebl, which says | |
200 | * to gobble up a blank silently. | |
201 | */ | |
202 | gobblebl = 0; | |
203 | ||
204 | /* | |
205 | * Text gathering loop. | |
206 | * New text goes into genbuf starting at gcursor. | |
207 | * cursor preserves place in linebuf where text will eventually go. | |
208 | */ | |
209 | if (*cursor == 0 || state == CRTOPEN) | |
210 | hold |= HOLDROL; | |
211 | for (;;) { | |
212 | if (ch == 'r' && repcnt == 0) | |
213 | escape = 0; | |
214 | else { | |
215 | gcursor = vgetline(repcnt, gcursor, &escape); | |
216 | ||
217 | /* | |
218 | * After an append, stick information | |
219 | * about the ^D's and ^^D's and 0^D's in | |
220 | * the repeated text buffer so repeated | |
221 | * inserts of stuff indented with ^D as backtab's | |
222 | * can work. | |
223 | */ | |
224 | if (HADUP) | |
225 | addtext("^"); | |
226 | else if (HADZERO) | |
227 | addtext("0"); | |
228 | while (CDCNT > 0) | |
229 | addtext("\204"), CDCNT--; | |
230 | if (gobbled) | |
231 | addtext(" "); | |
232 | addtext(ogcursor); | |
233 | } | |
234 | repcnt = 0; | |
235 | ||
236 | /* | |
237 | * Smash the generated and preexisting indents together | |
238 | * and generate one cleanly made out of tabs and spaces | |
239 | * if we are using autoindent. | |
240 | */ | |
241 | if (!vaifirst && value(AUTOINDENT)) { | |
242 | i = fixindent(indent); | |
243 | if (!HADUP) | |
244 | indent = i; | |
245 | gcursor = strend(genbuf); | |
246 | } | |
247 | ||
248 | /* | |
249 | * Limit the repetition count based on maximum | |
250 | * possible line length; do output implied | |
251 | * by further count (> 1) and cons up the new line | |
252 | * in linebuf. | |
253 | */ | |
254 | cnt = vmaxrep(ch, cnt); | |
255 | CP(gcursor + 1, cursor); | |
256 | do { | |
257 | CP(cursor, genbuf); | |
258 | if (cnt > 1) { | |
259 | int oldhold = hold; | |
260 | ||
261 | Outchar = vinschar; | |
262 | hold |= HOLDQIK; | |
263 | printf("%s", genbuf); | |
264 | hold = oldhold; | |
265 | Outchar = vputchar; | |
266 | } | |
267 | cursor += gcursor - genbuf; | |
268 | } while (--cnt > 0); | |
269 | endim(); | |
270 | vUA2 = cursor; | |
271 | if (escape != '\n') | |
272 | CP(cursor, gcursor + 1); | |
273 | ||
274 | /* | |
275 | * If doomed characters remain, clobber them, | |
276 | * and reopen the line to get the display exact. | |
277 | */ | |
278 | if (state != HARDOPEN) { | |
279 | DEPTH(vcline) = 0; | |
280 | if (doomed > 0) { | |
281 | register int cind = cindent(); | |
282 | ||
283 | physdc(cind, cind + doomed); | |
284 | doomed = 0; | |
285 | } | |
286 | i = vreopen(LINE(vcline), lineDOT(), vcline); | |
287 | } | |
288 | ||
289 | /* | |
290 | * All done unless we are continuing on to another line. | |
291 | */ | |
292 | if (escape != '\n') | |
293 | break; | |
294 | ||
295 | /* | |
296 | * Set up for the new line. | |
297 | * First save the current line, then construct a new | |
298 | * first image for the continuation line consisting | |
299 | * of any new autoindent plus the pushed ahead text. | |
300 | */ | |
301 | killU(); | |
302 | addtext(gobblebl ? " " : "\n"); | |
303 | vsave(); | |
304 | cnt = 1; | |
305 | if (value(AUTOINDENT)) { | |
306 | #ifdef LISPCODE | |
307 | if (value(LISP)) | |
308 | indent = lindent(dot + 1); | |
309 | else | |
310 | #endif | |
311 | if (!HADUP && vaifirst) | |
312 | indent = whitecnt(linebuf); | |
313 | vaifirst = 0; | |
314 | strcLIN(vpastwh(gcursor + 1)); | |
315 | gcursor = genindent(indent); | |
316 | *gcursor = 0; | |
317 | if (gcursor + strlen(linebuf) > &genbuf[LBSIZE - 2]) | |
318 | gcursor = genbuf; | |
319 | CP(gcursor, linebuf); | |
320 | } else { | |
321 | CP(genbuf, gcursor + 1); | |
322 | gcursor = genbuf; | |
323 | } | |
324 | ||
325 | /* | |
326 | * If we started out as a single line operation and are now | |
327 | * turning into a multi-line change, then we had better yank | |
328 | * out dot before it changes so that undo will work | |
329 | * correctly later. | |
330 | */ | |
887e3e0d | 331 | if (FIXUNDO && vundkind == VCHNG) { |
09035cec MH |
332 | vremote(1, yank, 0); |
333 | undap1--; | |
334 | } | |
335 | ||
336 | /* | |
337 | * Now do the append of the new line in the buffer, | |
338 | * and update the display. If slowopen | |
339 | * we don't do very much. | |
340 | */ | |
341 | vdoappend(genbuf); | |
342 | vundkind = VMANYINS; | |
343 | vcline++; | |
344 | if (state != VISUAL) | |
345 | vshow(dot, NOLINE); | |
346 | else { | |
347 | i += LINE(vcline - 1); | |
348 | vopen(dot, i); | |
349 | if (value(SLOWOPEN)) | |
350 | vscrap(); | |
351 | else | |
352 | vsync1(LINE(vcline)); | |
353 | } | |
354 | strcLIN(gcursor); | |
355 | *gcursor = 0; | |
356 | cursor = linebuf; | |
357 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
358 | } | |
359 | ||
360 | /* | |
361 | * All done with insertion, position the cursor | |
362 | * and sync the screen. | |
363 | */ | |
364 | hold = oldhold; | |
365 | if (cursor > linebuf) | |
366 | cursor--; | |
367 | if (state != HARDOPEN) | |
368 | vsyncCL(); | |
369 | else if (cursor > linebuf) | |
370 | back1(); | |
371 | doomed = 0; | |
372 | wcursor = cursor; | |
373 | vmove(); | |
374 | } | |
375 | ||
376 | /* | |
377 | * Subroutine for vgetline to back up a single character position, | |
378 | * backwards around end of lines (vgoto can't hack columns which are | |
379 | * less than 0 in general). | |
380 | */ | |
381 | back1() | |
382 | { | |
383 | ||
384 | vgoto(destline - 1, WCOLS + destcol - 1); | |
385 | } | |
386 | ||
387 | /* | |
388 | * Get a line into genbuf after gcursor. | |
389 | * Cnt limits the number of input characters | |
390 | * accepted and is used for handling the replace | |
391 | * single character command. Aescaped is the location | |
392 | * where we stick a termination indicator (whether we | |
393 | * ended with an ESCAPE or a newline/return. | |
394 | * | |
395 | * We do erase-kill type processing here and also | |
396 | * are careful about the way we do this so that it is | |
397 | * repeatable. (I.e. so that your kill doesn't happen, | |
398 | * when you repeat an insert if it was escaped with \ the | |
399 | * first time you did it. | |
400 | */ | |
401 | char * | |
402 | vgetline(cnt, gcursor, aescaped) | |
403 | int cnt; | |
404 | register char *gcursor; | |
405 | bool *aescaped; | |
406 | { | |
407 | register int c, ch; | |
408 | register char *cp; | |
409 | int x, y, iwhite; | |
410 | char *iglobp; | |
d266c416 | 411 | char cstr[2]; |
09035cec MH |
412 | int (*OO)() = Outchar; |
413 | ||
414 | /* | |
415 | * Clear the output state and counters | |
416 | * for autoindent backwards motion (counts of ^D, etc.) | |
417 | * Remember how much white space at beginning of line so | |
418 | * as not to allow backspace over autoindent. | |
419 | */ | |
420 | *aescaped = 0; | |
421 | ogcursor = gcursor; | |
422 | flusho(); | |
423 | CDCNT = 0; | |
424 | HADUP = 0; | |
425 | HADZERO = 0; | |
426 | gobbled = 0; | |
427 | iwhite = whitecnt(genbuf); | |
428 | iglobp = vglobp; | |
429 | ||
430 | /* | |
431 | * Carefully avoid using vinschar in the echo area. | |
432 | */ | |
433 | if (splitw) | |
434 | Outchar = vputchar; | |
435 | else { | |
436 | Outchar = vinschar; | |
437 | vprepins(); | |
438 | } | |
439 | for (;;) { | |
440 | if (gobblebl) | |
441 | gobblebl--; | |
442 | if (cnt != 0) { | |
443 | cnt--; | |
444 | if (cnt == 0) | |
445 | goto vadone; | |
446 | } | |
d266c416 MH |
447 | c = getkey(); |
448 | if (c != ATTN) | |
449 | c &= (QUOTE|TRIM); | |
450 | ch = c; | |
451 | maphopcnt = 0; | |
887e3e0d MH |
452 | if (vglobp == 0 && Peekkey == 0) |
453 | while ((ch = map(c, immacs)) != c) { | |
09035cec | 454 | c = ch; |
887e3e0d MH |
455 | if (!value(REMAP)) |
456 | break; | |
d266c416 MH |
457 | if (++maphopcnt > 256) |
458 | error("Infinite macro loop"); | |
887e3e0d | 459 | } |
09035cec MH |
460 | if (!iglobp) { |
461 | ||
462 | /* | |
463 | * Erase-kill type processing. | |
464 | * Only happens if we were not reading | |
465 | * from untyped input when we started. | |
466 | * Map users erase to ^H, kill to -1 for switch. | |
467 | */ | |
d266c416 | 468 | #ifndef USG3TTY |
09035cec MH |
469 | if (c == tty.sg_erase) |
470 | c = CTRL(h); | |
471 | else if (c == tty.sg_kill) | |
472 | c = -1; | |
d266c416 MH |
473 | #else |
474 | if (c == tty.c_cc[VERASE]) | |
475 | c = CTRL(h); | |
476 | else if (c == tty.c_cc[VKILL]) | |
477 | c = -1; | |
478 | #endif | |
09035cec MH |
479 | switch (c) { |
480 | ||
481 | /* | |
482 | * ^? Interrupt drops you back to visual | |
483 | * command mode with an unread interrupt | |
484 | * still in the input buffer. | |
485 | * | |
486 | * ^\ Quit does the same as interrupt. | |
487 | * If you are a ex command rather than | |
488 | * a vi command this will drop you | |
489 | * back to command mode for sure. | |
490 | */ | |
491 | case ATTN: | |
492 | case QUIT: | |
493 | ungetkey(c); | |
494 | goto vadone; | |
495 | ||
496 | /* | |
497 | * ^H Backs up a character in the input. | |
498 | * | |
499 | * BUG: Can't back around line boundaries. | |
500 | * This is hard because stuff has | |
501 | * already been saved for repeat. | |
502 | */ | |
503 | case CTRL(h): | |
504 | bakchar: | |
505 | cp = gcursor - 1; | |
506 | if (cp < ogcursor) { | |
507 | if (splitw) { | |
508 | /* | |
509 | * Backspacing over readecho | |
510 | * prompt. Pretend delete but | |
511 | * don't beep. | |
512 | */ | |
513 | ungetkey(c); | |
514 | goto vadone; | |
515 | } | |
516 | beep(); | |
517 | continue; | |
518 | } | |
519 | goto vbackup; | |
520 | ||
521 | /* | |
522 | * ^W Back up a white/non-white word. | |
523 | */ | |
524 | case CTRL(w): | |
525 | wdkind = 1; | |
526 | for (cp = gcursor; cp > ogcursor && isspace(cp[-1]); cp--) | |
527 | continue; | |
528 | for (c = wordch(cp - 1); | |
529 | cp > ogcursor && wordof(c, cp - 1); cp--) | |
530 | continue; | |
531 | goto vbackup; | |
532 | ||
533 | /* | |
534 | * users kill Kill input on this line, back to | |
535 | * the autoindent. | |
536 | */ | |
537 | case -1: | |
538 | cp = ogcursor; | |
539 | vbackup: | |
540 | if (cp == gcursor) { | |
541 | beep(); | |
542 | continue; | |
543 | } | |
544 | endim(); | |
545 | *cp = 0; | |
546 | c = cindent(); | |
547 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
548 | if (doomed >= 0) | |
549 | doomed += c - cindent(); | |
550 | gcursor = cp; | |
551 | continue; | |
552 | ||
553 | /* | |
554 | * \ Followed by erase or kill | |
555 | * maps to just the erase or kill. | |
556 | */ | |
557 | case '\\': | |
558 | x = destcol, y = destline; | |
559 | putchar('\\'); | |
560 | vcsync(); | |
561 | c = getkey(); | |
d266c416 | 562 | #ifndef USG3TTY |
09035cec | 563 | if (c == tty.sg_erase || c == tty.sg_kill) { |
d266c416 MH |
564 | #else |
565 | if (c == tty.c_cc[VERASE] | |
566 | || c == tty.c_cc[VKILL]) { | |
567 | #endif | |
09035cec MH |
568 | vgoto(y, x); |
569 | if (doomed >= 0) | |
570 | doomed++; | |
571 | goto def; | |
572 | } | |
573 | ungetkey(c), c = '\\'; | |
574 | goto noput; | |
575 | ||
576 | /* | |
577 | * ^Q Super quote following character | |
578 | * Only ^@ is verboten (trapped at | |
579 | * a lower level) and \n forces a line | |
580 | * split so doesn't really go in. | |
581 | * | |
582 | * ^V Synonym for ^Q | |
583 | */ | |
584 | case CTRL(q): | |
585 | case CTRL(v): | |
586 | x = destcol, y = destline; | |
587 | putchar('^'); | |
588 | vgoto(y, x); | |
589 | c = getkey(); | |
590 | #ifdef TIOCSETC | |
591 | if (c == ATTN) | |
592 | c = nttyc.t_intrc; | |
593 | #endif | |
594 | if (c != NL) { | |
595 | if (doomed >= 0) | |
596 | doomed++; | |
597 | goto def; | |
598 | } | |
599 | break; | |
600 | } | |
601 | } | |
602 | ||
603 | /* | |
604 | * If we get a blank not in the echo area | |
605 | * consider splitting the window in the wrapmargin. | |
606 | */ | |
d266c416 MH |
607 | if (c != NL && !splitw) { |
608 | if (c == ' ' && gobblebl) { | |
09035cec MH |
609 | gobbled = 1; |
610 | continue; | |
611 | } | |
d266c416 MH |
612 | if (/* c <= ' ' && */ value(WRAPMARGIN) && |
613 | outcol >= OCOLUMNS - value(WRAPMARGIN)) { | |
614 | /* | |
615 | * At end of word and hit wrapmargin. | |
616 | * Move the word to next line and keep going. | |
617 | */ | |
618 | wdkind = 1; | |
619 | *gcursor++ = c; | |
620 | *gcursor = 0; | |
621 | /* | |
622 | * Find end of previous word if we are past it. | |
623 | */ | |
624 | for (cp=gcursor; cp>ogcursor && isspace(cp[-1]); cp--) | |
625 | ; | |
626 | if (outcol - (gcursor-cp) >= OCOLUMNS - value(WRAPMARGIN)) { | |
627 | /* | |
628 | * Find beginning of previous word. | |
629 | */ | |
630 | for (; cp>ogcursor && !isspace(cp[-1]); cp--) | |
631 | ; | |
632 | if (cp <= ogcursor) { | |
633 | /* | |
634 | * There is a single word that | |
635 | * is too long to fit. Just | |
636 | * let it pass, but beep for | |
637 | * each new letter to warn | |
638 | * the luser. | |
639 | */ | |
640 | c = *--gcursor; | |
641 | *gcursor = 0; | |
642 | beep(); | |
643 | goto dontbreak; | |
644 | } | |
645 | /* | |
646 | * Save it for next line. | |
647 | */ | |
648 | macpush(cp, 0); | |
649 | cp--; | |
650 | } | |
651 | macpush("\n", 0); | |
652 | /* | |
653 | * Erase white space before the word. | |
654 | */ | |
655 | while (cp > ogcursor && isspace(cp[-1])) | |
656 | cp--; /* skip blank */ | |
657 | gobblebl = 3; | |
658 | goto vbackup; | |
09035cec | 659 | } |
d266c416 MH |
660 | dontbreak:; |
661 | } | |
662 | ||
663 | /* | |
664 | * Word abbreviation mode. | |
665 | */ | |
666 | cstr[0] = c; | |
667 | if (anyabbrs && gcursor > ogcursor && !wordch(cstr) && wordch(gcursor-1)) { | |
668 | int wdtype, abno; | |
669 | ||
670 | cstr[1] = 0; | |
671 | wdkind = 1; | |
672 | cp = gcursor - 1; | |
673 | for (wdtype = wordch(cp - 1); | |
674 | cp > ogcursor && wordof(wdtype, cp - 1); cp--) | |
675 | ; | |
676 | *gcursor = 0; | |
677 | for (abno=0; abbrevs[abno].mapto; abno++) { | |
678 | if (eq(cp, abbrevs[abno].cap)) { | |
679 | macpush(cstr, 0); | |
680 | macpush(abbrevs[abno].mapto); | |
681 | goto vbackup; | |
682 | } | |
683 | } | |
09035cec | 684 | } |
d266c416 | 685 | |
09035cec MH |
686 | switch (c) { |
687 | ||
688 | /* | |
689 | * ^M Except in repeat maps to \n. | |
690 | */ | |
691 | case CR: | |
692 | if (vglobp) | |
693 | goto def; | |
694 | c = '\n'; | |
695 | /* presto chango ... */ | |
696 | ||
697 | /* | |
698 | * \n Start new line. | |
699 | */ | |
700 | case NL: | |
701 | *aescaped = c; | |
702 | goto vadone; | |
703 | ||
704 | /* | |
705 | * escape End insert unless repeat and more to repeat. | |
706 | */ | |
707 | case ESCAPE: | |
708 | if (lastvgk) | |
709 | goto def; | |
710 | goto vadone; | |
711 | ||
712 | /* | |
713 | * ^D Backtab. | |
714 | * ^T Software forward tab. | |
715 | * | |
716 | * Unless in repeat where this means these | |
717 | * were superquoted in. | |
718 | */ | |
719 | case CTRL(d): | |
720 | case CTRL(t): | |
721 | if (vglobp) | |
722 | goto def; | |
723 | /* fall into ... */ | |
724 | ||
725 | /* | |
726 | * ^D|QUOTE Is a backtab (in a repeated command). | |
727 | */ | |
728 | case CTRL(d) | QUOTE: | |
729 | *gcursor = 0; | |
730 | cp = vpastwh(genbuf); | |
731 | c = whitecnt(genbuf); | |
732 | if (ch == CTRL(t)) { | |
733 | /* | |
734 | * ^t just generates new indent replacing | |
735 | * current white space rounded up to soft | |
736 | * tab stop increment. | |
737 | */ | |
738 | if (cp != gcursor) | |
739 | /* | |
740 | * BUG: Don't hack ^T except | |
741 | * right after initial | |
742 | * white space. | |
743 | */ | |
744 | continue; | |
745 | cp = genindent(iwhite = backtab(c + value(SHIFTWIDTH) + 1)); | |
746 | ogcursor = cp; | |
747 | goto vbackup; | |
748 | } | |
749 | /* | |
750 | * ^D works only if we are at the (end of) the | |
751 | * generated autoindent. We count the ^D for repeat | |
752 | * purposes. | |
753 | */ | |
754 | if (c == iwhite && c != 0) | |
755 | if (cp == gcursor) { | |
756 | iwhite = backtab(c); | |
757 | CDCNT++; | |
758 | ogcursor = cp = genindent(iwhite); | |
759 | goto vbackup; | |
760 | } else if (&cp[1] == gcursor && | |
761 | (*cp == '^' || *cp == '0')) { | |
762 | /* | |
763 | * ^^D moves to margin, then back | |
764 | * to current indent on next line. | |
765 | * | |
766 | * 0^D moves to margin and then | |
767 | * stays there. | |
768 | */ | |
769 | HADZERO = *cp == '0'; | |
770 | ogcursor = cp = genbuf; | |
771 | HADUP = 1 - HADZERO; | |
772 | CDCNT = 1; | |
773 | endim(); | |
774 | back1(); | |
887e3e0d | 775 | vputchar(' '); |
09035cec MH |
776 | goto vbackup; |
777 | } | |
778 | if (vglobp && vglobp - iglobp >= 2 && | |
779 | (vglobp[-2] == '^' || vglobp[-2] == '0') | |
780 | && gcursor == ogcursor + 1) | |
781 | goto bakchar; | |
782 | continue; | |
783 | ||
784 | default: | |
785 | /* | |
786 | * Possibly discard control inputs. | |
787 | */ | |
788 | if (!vglobp && junk(c)) { | |
789 | beep(); | |
790 | continue; | |
791 | } | |
792 | def: | |
793 | putchar(c); | |
d266c416 | 794 | flush(); |
09035cec MH |
795 | noput: |
796 | if (gcursor > &genbuf[LBSIZE - 2]) | |
797 | error("Line too long"); | |
798 | *gcursor++ = c & TRIM; | |
799 | vcsync(); | |
09035cec MH |
800 | if (value(SHOWMATCH) && !iglobp) |
801 | if (c == ')' || c == '}') | |
802 | lsmatch(gcursor); | |
09035cec MH |
803 | continue; |
804 | } | |
805 | } | |
806 | vadone: | |
807 | *gcursor = 0; | |
d266c416 MH |
808 | if (Outchar != termchar) |
809 | Outchar = OO; | |
09035cec MH |
810 | endim(); |
811 | return (gcursor); | |
812 | } | |
813 | ||
814 | int vgetsplit(); | |
815 | char *vsplitpt; | |
816 | ||
817 | /* | |
818 | * Append the line in buffer at lp | |
819 | * to the buffer after dot. | |
820 | */ | |
821 | vdoappend(lp) | |
822 | char *lp; | |
823 | { | |
824 | register int oing = inglobal; | |
825 | ||
826 | vsplitpt = lp; | |
827 | inglobal = 1; | |
828 | ignore(append(vgetsplit, dot)); | |
829 | inglobal = oing; | |
830 | } | |
831 | ||
832 | /* | |
833 | * Subroutine for vdoappend to pass to append. | |
834 | */ | |
835 | vgetsplit() | |
836 | { | |
837 | ||
838 | if (vsplitpt == 0) | |
839 | return (EOF); | |
840 | strcLIN(vsplitpt); | |
841 | vsplitpt = 0; | |
842 | return (0); | |
843 | } | |
844 | ||
845 | /* | |
846 | * Vmaxrep determines the maximum repetitition factor | |
847 | * allowed that will yield total line length less than | |
44232d5b | 848 | * LBSIZE characters and also does hacks for the R command. |
09035cec MH |
849 | */ |
850 | vmaxrep(ch, cnt) | |
851 | char ch; | |
852 | register int cnt; | |
853 | { | |
854 | register int len, replen; | |
855 | ||
856 | if (cnt > LBSIZE - 2) | |
857 | cnt = LBSIZE - 2; | |
858 | replen = strlen(genbuf); | |
859 | if (ch == 'R') { | |
860 | len = strlen(cursor); | |
861 | if (replen < len) | |
862 | len = replen; | |
863 | CP(cursor, cursor + len); | |
864 | vUD2 += len; | |
865 | } | |
866 | len = strlen(linebuf); | |
867 | if (len + cnt * replen <= LBSIZE - 2) | |
868 | return (cnt); | |
869 | cnt = (LBSIZE - 2 - len) / replen; | |
870 | if (cnt == 0) { | |
871 | vsave(); | |
872 | error("Line too long"); | |
873 | } | |
874 | return (cnt); | |
875 | } |