Commit | Line | Data |
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79597adf MH |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | #include "ex.h" | |
3 | #include "ex_tty.h" | |
4 | #include "ex_vis.h" | |
5 | ||
6 | /* | |
7 | * This file defines the operation sequences which interface the | |
8 | * logical changes to the file buffer with the internal and external | |
9 | * display representations. | |
10 | */ | |
11 | ||
12 | /* | |
13 | * Undo. | |
14 | * | |
15 | * Undo is accomplished in two ways. We often for small changes in the | |
16 | * current line know how (in terms of a change operator) how the change | |
17 | * occurred. Thus on an intelligent terminal we can undo the operation | |
18 | * by another such operation, using insert and delete character | |
19 | * stuff. The pointers vU[AD][12] index the buffer vutmp when this | |
20 | * is possible and provide the necessary information. | |
21 | * | |
22 | * The other case is that the change involved multiple lines or that | |
23 | * we have moved away from the line or forgotten how the change was | |
24 | * accomplished. In this case we do a redisplay and hope that the | |
25 | * low level optimization routines (which don't look for winning | |
26 | * via insert/delete character) will not lose too badly. | |
27 | */ | |
28 | char *vUA1, *vUA2; | |
29 | char *vUD1, *vUD2; | |
30 | ||
31 | vUndo() | |
32 | { | |
33 | ||
34 | /* | |
35 | * Avoid UU which clobbers ability to do u. | |
36 | */ | |
37 | if (vundkind == VCAPU || vUNDdot != dot) { | |
38 | beep(); | |
39 | return; | |
40 | } | |
41 | CP(vutmp, linebuf); | |
42 | vUD1 = linebuf; vUD2 = strend(linebuf); | |
43 | putmk1(dot, vUNDsav); | |
44 | getDOT(); | |
45 | vUA1 = linebuf; vUA2 = strend(linebuf); | |
46 | vundkind = VCAPU; | |
47 | if (state == ONEOPEN || state == HARDOPEN) { | |
48 | vjumpto(dot, vUNDcurs, 0); | |
49 | return; | |
50 | } | |
51 | vdirty(vcline, 1); | |
52 | vsyncCL(); | |
53 | vfixcurs(); | |
54 | } | |
55 | ||
56 | vundo() | |
57 | { | |
58 | register int cnt; | |
59 | register line *addr; | |
60 | register char *cp; | |
61 | char temp[LBSIZE]; | |
62 | bool savenote; | |
63 | int (*OO)(); | |
64 | short oldhold = hold; | |
65 | ||
66 | switch (vundkind) { | |
67 | ||
68 | case VMANYINS: | |
69 | wcursor = 0; | |
70 | addr1 = undap1; | |
71 | addr2 = undap2 - 1; | |
72 | vsave(); | |
73 | YANKreg('1'); | |
74 | notecnt = 0; | |
75 | /* fall into ... */ | |
76 | ||
77 | case VMANY: | |
78 | case VMCHNG: | |
79 | vsave(); | |
80 | addr = dot - vcline; | |
81 | notecnt = 1; | |
82 | if (undkind == UNDPUT && undap1 == undap2) { | |
83 | beep(); | |
84 | return; | |
85 | } | |
86 | /* | |
87 | * Undo() call below basically replaces undap1 to undap2-1 | |
88 | * with dol through unddol-1. Hack screen image to | |
89 | * reflect this replacement. | |
90 | */ | |
91 | vreplace(undap1 - addr, undap2 - undap1, | |
92 | undkind == UNDPUT ? 0 : unddol - dol); | |
93 | savenote = notecnt; | |
94 | undo(1); | |
95 | if (vundkind != VMCHNG || addr != dot) | |
96 | killU(); | |
97 | vundkind = VMANY; | |
98 | cnt = dot - addr; | |
99 | if (cnt < 0 || cnt > vcnt || state != VISUAL) { | |
100 | vjumpto(dot, NOSTR, '.'); | |
101 | return; | |
102 | } | |
103 | if (!savenote) | |
104 | notecnt = 0; | |
105 | vcline = cnt; | |
106 | vrepaint(vmcurs); | |
107 | vmcurs = 0; | |
108 | return; | |
109 | ||
110 | case VCHNG: | |
111 | case VCAPU: | |
112 | vundkind = VCHNG; | |
113 | strcpy(temp, vutmp); | |
114 | strcpy(vutmp, linebuf); | |
115 | doomed = column(vUA2 - 1) - column(vUA1 - 1); | |
116 | strcLIN(temp); | |
117 | cp = vUA1; vUA1 = vUD1; vUD1 = cp; | |
118 | cp = vUA2; vUA2 = vUD2; vUD2 = cp; | |
119 | cursor = vUD1; | |
120 | if (state == HARDOPEN) { | |
121 | doomed = 0; | |
122 | vsave(); | |
123 | vopen(dot, WBOT); | |
124 | vnline(cursor); | |
125 | return; | |
126 | } | |
127 | /* | |
128 | * Pseudo insert command. | |
129 | */ | |
130 | vcursat(cursor); | |
131 | OO = Outchar; Outchar = vinschar; hold |= HOLDQIK; | |
132 | vprepins(); | |
133 | temp[vUA2 - linebuf] = 0; | |
134 | for (cp = &temp[vUA1 - linebuf]; *cp;) | |
135 | putchar(*cp++); | |
136 | Outchar = OO; hold = oldhold; | |
137 | endim(); | |
138 | physdc(cindent(), cindent() + doomed); | |
139 | doomed = 0; | |
140 | vdirty(vcline, 1); | |
141 | vsyncCL(); | |
142 | if (cursor > linebuf && cursor >= strend(linebuf)) | |
143 | cursor--; | |
144 | vfixcurs(); | |
145 | return; | |
146 | ||
147 | case VNONE: | |
148 | beep(); | |
149 | return; | |
150 | } | |
151 | } | |
152 | ||
153 | /* | |
154 | * Initialize undo information before an append. | |
155 | */ | |
156 | vnoapp() | |
157 | { | |
158 | ||
159 | vUD1 = vUD2 = cursor; | |
160 | } | |
161 | ||
162 | /* | |
163 | * All the rest of the motion sequences have one or more | |
164 | * cases to deal with. In the case wdot == 0, operation | |
165 | * is totally within current line, from cursor to wcursor. | |
166 | * If wdot is given, but wcursor is 0, then operation affects | |
167 | * the inclusive line range. The hardest case is when both wdot | |
168 | * and wcursor are given, then operation affects from line dot at | |
169 | * cursor to line wdot at wcursor. | |
170 | */ | |
171 | ||
172 | /* | |
173 | * Move is simple, except for moving onto new lines in hardcopy open mode. | |
174 | */ | |
175 | vmove() | |
176 | { | |
177 | register int cnt; | |
178 | ||
179 | if (wdot) { | |
180 | if (wdot < one || wdot > dol) { | |
181 | beep(); | |
182 | return; | |
183 | } | |
184 | cnt = wdot - dot; | |
185 | wdot = NOLINE; | |
186 | if (cnt) | |
187 | killU(); | |
188 | vupdown(cnt, wcursor); | |
189 | return; | |
190 | } | |
191 | ||
192 | /* | |
193 | * When we move onto a new line, save information for U undo. | |
194 | */ | |
195 | if (vUNDdot != dot) { | |
196 | vUNDsav = *dot; | |
197 | vUNDcurs = wcursor; | |
198 | vUNDdot = dot; | |
199 | } | |
200 | ||
201 | /* | |
202 | * In hardcopy open, type characters to left of cursor | |
203 | * on new line, or back cursor up if its to left of where we are. | |
204 | * In any case if the current line is ``rubbled'' i.e. has trashy | |
205 | * looking overstrikes on it or \'s from deletes, we reprint | |
206 | * so it is more comprehensible (and also because we can't work | |
207 | * if we let it get more out of sync since column() won't work right. | |
208 | */ | |
209 | if (state == HARDOPEN) { | |
210 | register char *cp; | |
211 | if (rubble) { | |
212 | register int c; | |
213 | int oldhold = hold; | |
214 | ||
215 | sethard(); | |
216 | cp = wcursor; | |
217 | c = *cp; | |
218 | *cp = 0; | |
219 | hold |= HOLDDOL; | |
220 | vreopen(WTOP, lineDOT(), vcline); | |
221 | hold = oldhold; | |
222 | *cp = c; | |
223 | } else if (wcursor > cursor) { | |
224 | vfixcurs(); | |
225 | for (cp = cursor; *cp && cp < wcursor;) { | |
226 | register int c = *cp++ & TRIM; | |
227 | ||
228 | putchar(c ? c : ' '); | |
229 | } | |
230 | } | |
231 | } | |
232 | vsetcurs(wcursor); | |
233 | } | |
234 | ||
235 | /* | |
236 | * Delete operator. | |
237 | * | |
238 | * Hard case of deleting a range where both wcursor and wdot | |
239 | * are specified is treated as a special case of change and handled | |
240 | * by vchange (although vchange may pass it back if it degenerates | |
241 | * to a full line range delete.) | |
242 | */ | |
243 | vdelete(c) | |
244 | char c; | |
245 | { | |
246 | register char *cp; | |
247 | register int i; | |
248 | ||
249 | if (wdot) { | |
250 | if (wcursor) { | |
251 | vchange('d'); | |
252 | return; | |
253 | } | |
254 | if ((i = xdw()) < 0) | |
255 | return; | |
256 | if (state != VISUAL) { | |
257 | vgoto(LINE(0), 0); | |
258 | vputchar('@'); | |
259 | } | |
260 | wdot = dot; | |
261 | vremote(i, delete, 0); | |
262 | notenam = "delete"; | |
263 | DEL[0] = 0; | |
264 | killU(); | |
265 | vreplace(vcline, i, 0); | |
266 | if (wdot > dol) | |
267 | vcline--; | |
268 | vrepaint(NOSTR); | |
269 | return; | |
270 | } | |
271 | if (wcursor < linebuf) | |
272 | wcursor = linebuf; | |
273 | if (cursor == wcursor) { | |
274 | beep(); | |
275 | return; | |
276 | } | |
277 | i = vdcMID(); | |
278 | cp = cursor; | |
279 | setDEL(); | |
280 | CP(cp, wcursor); | |
281 | if (cp > linebuf && (cp[0] == 0 || c == '#')) | |
282 | cp--; | |
283 | if (state == HARDOPEN) { | |
284 | bleep(i, cp); | |
285 | cursor = cp; | |
286 | return; | |
287 | } | |
288 | physdc(column(cursor - 1), i); | |
289 | DEPTH(vcline) = 0; | |
290 | vreopen(LINE(vcline), lineDOT(), vcline); | |
291 | vsyncCL(); | |
292 | vsetcurs(cp); | |
293 | } | |
294 | ||
295 | /* | |
296 | * Change operator. | |
297 | * | |
298 | * In a single line we mark the end of the changed area with '$'. | |
299 | * On multiple whole lines, we clear the lines first. | |
300 | * Across lines with both wcursor and wdot given, we delete | |
301 | * and sync then append (but one operation for undo). | |
302 | */ | |
303 | vchange(c) | |
304 | char c; | |
305 | { | |
306 | register char *cp; | |
307 | register int i, ind, cnt; | |
308 | line *addr; | |
309 | ||
310 | if (wdot) { | |
311 | /* | |
312 | * Change/delete of lines or across line boundaries. | |
313 | */ | |
314 | if ((cnt = xdw()) < 0) | |
315 | return; | |
316 | getDOT(); | |
317 | if (wcursor && cnt == 1) { | |
318 | /* | |
319 | * Not really. | |
320 | */ | |
321 | wdot = 0; | |
322 | if (c == 'd') { | |
323 | vdelete(c); | |
324 | return; | |
325 | } | |
326 | goto smallchange; | |
327 | } | |
328 | if (cursor && wcursor) { | |
329 | /* | |
330 | * Across line boundaries, but not | |
331 | * necessarily whole lines. | |
332 | * Construct what will be left. | |
333 | */ | |
334 | *cursor = 0; | |
335 | strcpy(genbuf, linebuf); | |
336 | getline(*wdot); | |
337 | if (strlen(genbuf) + strlen(wcursor) > LBSIZE - 2) { | |
338 | getDOT(); | |
339 | beep(); | |
340 | return; | |
341 | } | |
342 | strcat(genbuf, wcursor); | |
343 | if (c == 'd' && *vpastwh(genbuf) == 0) { | |
344 | /* | |
345 | * Although this is a delete | |
346 | * spanning line boundaries, what | |
347 | * would be left is all white space, | |
348 | * so take it all away. | |
349 | */ | |
350 | wcursor = 0; | |
351 | getDOT(); | |
352 | op = 0; | |
353 | notpart(lastreg); | |
354 | notpart('1'); | |
355 | vdelete(c); | |
356 | return; | |
357 | } | |
358 | ind = -1; | |
359 | } else if (c == 'd' && wcursor == 0) { | |
360 | vdelete(c); | |
361 | return; | |
362 | } else | |
363 | #ifdef LISPCODE | |
364 | /* | |
365 | * We are just substituting text for whole lines, | |
366 | * so determine the first autoindent. | |
367 | */ | |
368 | if (value(LISP) && value(AUTOINDENT)) | |
369 | ind = lindent(dot); | |
370 | else | |
371 | #endif | |
372 | ind = whitecnt(linebuf); | |
373 | i = vcline >= 0 ? LINE(vcline) : WTOP; | |
374 | ||
375 | /* | |
376 | * Delete the lines from the buffer, | |
377 | * and remember how the partial stuff came about in | |
378 | * case we are told to put. | |
379 | */ | |
380 | addr = dot; | |
381 | vremote(cnt, delete, 0); | |
382 | setpk(); | |
383 | notenam = "delete"; | |
384 | if (c != 'd') | |
385 | notenam = "change"; | |
386 | /* | |
387 | * If DEL[0] were nonzero, put would put it back | |
388 | * rather than the deleted lines. | |
389 | */ | |
390 | DEL[0] = 0; | |
391 | if (cnt > 1) | |
392 | killU(); | |
393 | ||
394 | /* | |
395 | * Now hack the screen image coordination. | |
396 | */ | |
397 | vreplace(vcline, cnt, 0); | |
398 | wdot = NOLINE; | |
399 | noteit(0); | |
400 | vcline--; | |
401 | if (addr <= dol) | |
402 | dot--; | |
403 | ||
404 | /* | |
405 | * If this is a across line delete/change, | |
406 | * cursor stays where it is; just splice together the pieces | |
407 | * of the new line. Otherwise generate a autoindent | |
408 | * after a S command. | |
409 | */ | |
410 | if (ind >= 0) { | |
411 | *genindent(ind) = 0; | |
412 | vdoappend(genbuf); | |
413 | } else { | |
414 | vmcurs = cursor; | |
415 | strcLIN(genbuf); | |
416 | vdoappend(linebuf); | |
417 | } | |
418 | ||
419 | /* | |
420 | * Indicate a change on hardcopies by | |
421 | * erasing the current line. | |
422 | */ | |
423 | if (c != 'd' && state != VISUAL && state != HARDOPEN) { | |
424 | int oldhold = hold; | |
425 | ||
426 | hold |= HOLDAT, vclrlin(i, dot), hold = oldhold; | |
427 | } | |
428 | ||
429 | /* | |
430 | * Open the line (logically) on the screen, and | |
431 | * update the screen tail. Unless we are really a delete | |
432 | * go off and gather up inserted characters. | |
433 | */ | |
434 | vcline++; | |
435 | if (vcline < 0) | |
436 | vcline = 0; | |
437 | vopen(dot, i); | |
438 | vsyncCL(); | |
439 | noteit(1); | |
440 | if (c != 'd') { | |
441 | if (ind >= 0) { | |
442 | cursor = linebuf; | |
443 | linebuf[0] = 0; | |
444 | vfixcurs(); | |
445 | } else { | |
446 | ind = 0; | |
447 | vcursat(cursor); | |
448 | } | |
449 | vappend('x', 1, ind); | |
450 | return; | |
451 | } | |
452 | if (*cursor == 0 && cursor > linebuf) | |
453 | cursor--; | |
454 | vrepaint(cursor); | |
455 | return; | |
456 | } | |
457 | ||
458 | smallchange: | |
459 | /* | |
460 | * The rest of this is just low level hacking on changes | |
461 | * of small numbers of characters. | |
462 | */ | |
463 | if (wcursor < linebuf) | |
464 | wcursor = linebuf; | |
465 | if (cursor == wcursor) { | |
466 | beep(); | |
467 | return; | |
468 | } | |
469 | i = vdcMID(); | |
470 | cp = cursor; | |
471 | if (state != HARDOPEN) | |
472 | vfixcurs(); | |
473 | ||
474 | /* | |
475 | * Put out the \\'s indicating changed text in hardcopy, | |
476 | * or mark the end of the change with $ if not hardcopy. | |
477 | */ | |
478 | if (state == HARDOPEN) | |
479 | bleep(i, cp); | |
480 | else { | |
481 | vcursbef(wcursor); | |
482 | putchar('$'); | |
483 | i = cindent(); | |
484 | } | |
485 | ||
486 | /* | |
487 | * Remember the deleted text for possible put, | |
488 | * and then prepare and execute the input portion of the change. | |
489 | */ | |
490 | cursor = cp; | |
491 | setDEL(); | |
492 | CP(cursor, wcursor); | |
493 | if (state != HARDOPEN) { | |
494 | vcursaft(cursor - 1); | |
495 | doomed = i - cindent(); | |
496 | } else { | |
497 | /* | |
498 | sethard(); | |
499 | wcursor = cursor; | |
500 | cursor = linebuf; | |
501 | vgoto(outline, value(NUMBER) << 3); | |
502 | vmove(); | |
503 | */ | |
504 | doomed = 0; | |
505 | } | |
506 | prepapp(); | |
507 | vappend('c', 1, 0); | |
508 | } | |
509 | ||
510 | /* | |
511 | * Open new lines. | |
512 | * | |
513 | * Tricky thing here is slowopen. This causes display updating | |
514 | * to be held off so that 300 baud dumb terminals don't lose badly. | |
515 | * This also suppressed counts, which otherwise say how many blank | |
516 | * space to open up. Counts are also suppressed on intelligent terminals. | |
517 | * Actually counts are obsoleted, since if your terminal is slow | |
518 | * you are better off with slowopen. | |
519 | */ | |
520 | voOpen(c, cnt) | |
521 | char c; | |
522 | register int cnt; | |
523 | { | |
524 | register int ind = 0, i; | |
525 | short oldhold = hold; | |
526 | ||
527 | if (value(SLOWOPEN) || value(REDRAW) && AL && DL) | |
528 | cnt = 1; | |
529 | vsave(); | |
530 | setLAST(); | |
531 | if (value(AUTOINDENT)) | |
532 | ind = whitecnt(linebuf); | |
533 | if (c == 'O') { | |
534 | vcline--; | |
535 | dot--; | |
536 | if (dot > zero) | |
537 | getDOT(); | |
538 | } | |
539 | if (value(AUTOINDENT)) { | |
540 | #ifdef LISPCODE | |
541 | if (value(LISP)) | |
542 | ind = lindent(dot + 1); | |
543 | #endif | |
544 | } | |
545 | killU(); | |
546 | prepapp(); | |
547 | vundkind = VMANY; | |
548 | if (state != VISUAL) | |
549 | c = WBOT + 1; | |
550 | else { | |
551 | c = vcline < 0 ? WTOP - cnt : LINE(vcline) + DEPTH(vcline); | |
552 | if (c < ZERO) | |
553 | c = ZERO; | |
554 | i = LINE(vcline + 1) - c; | |
555 | if (i < cnt && c <= WBOT && (!AL || !DL)) | |
556 | vinslin(c, cnt - i, vcline); | |
557 | } | |
558 | *genindent(ind) = 0; | |
559 | vdoappend(genbuf); | |
560 | vcline++; | |
561 | oldhold = hold; | |
562 | hold |= HOLDROL; | |
563 | vopen(dot, c); | |
564 | hold = oldhold; | |
565 | if (value(SLOWOPEN)) | |
566 | /* | |
567 | * Oh, so lazy! | |
568 | */ | |
569 | vscrap(); | |
570 | else | |
571 | vsync1(LINE(vcline)); | |
572 | cursor = linebuf; | |
573 | linebuf[0] = 0; | |
574 | vappend('o', 1, ind); | |
575 | } | |
576 | ||
577 | /* | |
578 | * > < and = shift operators. | |
579 | * | |
580 | * Note that =, which aligns lisp, is just a ragged sort of shift, | |
581 | * since it never distributes text between lines. | |
582 | */ | |
583 | char vshnam[2] = { 'x', 0 }; | |
584 | ||
585 | vshftop() | |
586 | { | |
587 | register line *addr; | |
588 | register int cnt; | |
589 | ||
590 | if ((cnt = xdw()) < 0) | |
591 | return; | |
592 | addr = dot; | |
593 | vremote(cnt, vshift, 0); | |
594 | vshnam[0] = op; | |
595 | notenam = vshnam; | |
596 | dot = addr; | |
597 | vreplace(vcline, cnt, cnt); | |
598 | if (state == HARDOPEN) | |
599 | vcnt = 0; | |
600 | vrepaint(NOSTR); | |
601 | } | |
602 | ||
603 | /* | |
604 | * !. | |
605 | * | |
606 | * Filter portions of the buffer through unix commands. | |
607 | */ | |
608 | vfilter() | |
609 | { | |
610 | register line *addr; | |
611 | register int cnt; | |
612 | char *oglobp, d; | |
613 | ||
614 | if ((cnt = xdw()) < 0) | |
615 | return; | |
616 | if (vglobp) | |
617 | vglobp = uxb; | |
618 | if (readecho('!')) | |
619 | return; | |
620 | oglobp = globp; globp = genbuf + 1; | |
621 | d = peekc; ungetchar(0); | |
622 | CATCH | |
623 | fixech(); | |
624 | unix0(0); | |
625 | ONERR | |
626 | splitw = 0; | |
627 | ungetchar(d); | |
628 | vrepaint(cursor); | |
629 | globp = oglobp; | |
630 | return; | |
631 | ENDCATCH | |
632 | ungetchar(d); globp = oglobp; | |
633 | addr = dot; | |
634 | CATCH | |
635 | vgoto(WECHO, 0); flusho(); | |
636 | vremote(cnt, filter, 2); | |
637 | ONERR | |
638 | vdirty(0, LINES); | |
639 | ENDCATCH | |
640 | if (dot == zero && dol > zero) | |
641 | dot = one; | |
642 | splitw = 0; | |
643 | notenam = ""; | |
644 | vreplace(vcline, cnt, undap2 - undap1); | |
645 | dot = addr; | |
646 | if (dot > dol) { | |
647 | dot--; | |
648 | vcline--; | |
649 | } | |
650 | vrepaint(NOSTR); | |
651 | } | |
652 | ||
653 | /* | |
654 | * Xdw exchanges dot and wdot if appropriate and also checks | |
655 | * that wdot is reasonable. Its name comes from | |
656 | * xchange dotand wdot | |
657 | */ | |
658 | xdw() | |
659 | { | |
660 | register char *cp; | |
661 | register int cnt; | |
662 | /* | |
663 | register int notp = 0; | |
664 | */ | |
665 | ||
666 | if (wdot == NOLINE || wdot < one || wdot > dol) { | |
667 | beep(); | |
668 | return (-1); | |
669 | } | |
670 | vsave(); | |
671 | setLAST(); | |
672 | if (dot > wdot) { | |
673 | register line *addr; | |
674 | ||
675 | vcline -= dot - wdot; | |
676 | addr = dot; dot = wdot; wdot = addr; | |
677 | cp = cursor; cursor = wcursor; wcursor = cp; | |
678 | } | |
679 | /* | |
680 | * If a region is specified but wcursor is at the begining | |
681 | * of the last line, then we move it to be the end of the | |
682 | * previous line (actually off the end). | |
683 | */ | |
684 | if (cursor && wcursor == linebuf && wdot > dot) { | |
685 | wdot--; | |
686 | getDOT(); | |
687 | if (vpastwh(linebuf) >= cursor) | |
688 | wcursor = 0; | |
689 | else { | |
690 | getline(*wdot); | |
691 | wcursor = strend(linebuf); | |
692 | getDOT(); | |
693 | } | |
694 | /* | |
695 | * Should prepare in caller for possible dot == wdot. | |
696 | */ | |
697 | } | |
698 | cnt = wdot - dot + 1; | |
699 | if (vreg) { | |
700 | vremote(cnt, YANKreg, vreg); | |
701 | /* | |
702 | if (notp) | |
703 | notpart(vreg); | |
704 | */ | |
705 | } | |
706 | ||
707 | /* | |
708 | * Kill buffer code. If delete operator is c or d, then save | |
709 | * the region in numbered buffers. | |
710 | * | |
711 | * BUG: This may be somewhat inefficient due | |
712 | * to the way named buffer are implemented, | |
713 | * necessitating some optimization. | |
714 | */ | |
715 | vreg = 0; | |
716 | if (any(op, "cd")) { | |
717 | vremote(cnt, YANKreg, '1'); | |
718 | /* | |
719 | if (notp) | |
720 | notpart('1'); | |
721 | */ | |
722 | } | |
723 | return (cnt); | |
724 | } | |
725 | ||
726 | /* | |
727 | * Routine for vremote to call to implement shifts. | |
728 | */ | |
729 | vshift() | |
730 | { | |
731 | ||
732 | shift(op, 1); | |
733 | } | |
734 | ||
735 | /* | |
736 | * Replace a single character with the next input character. | |
737 | * A funny kind of insert. | |
738 | */ | |
739 | vrep(cnt) | |
740 | register int cnt; | |
741 | { | |
742 | register int i, c; | |
743 | ||
744 | if (cnt > strlen(cursor)) { | |
745 | beep(); | |
746 | return; | |
747 | } | |
748 | i = column(cursor + cnt - 1); | |
749 | vcursat(cursor); | |
750 | doomed = i - cindent(); | |
751 | if (!vglobp) { | |
752 | c = getesc(); | |
753 | if (c == 0) { | |
754 | vfixcurs(); | |
755 | return; | |
756 | } | |
757 | ungetkey(c); | |
758 | } | |
759 | CP(vutmp, linebuf); | |
760 | vundkind = VCHNG; | |
761 | wcursor = cursor + cnt; | |
762 | vUD1 = cursor; vUD2 = wcursor; | |
763 | CP(cursor, wcursor); | |
764 | prepapp(); | |
765 | vappend('r', cnt, 0); | |
766 | *lastcp++ = INS[0]; | |
767 | setLAST(); | |
768 | } | |
769 | ||
770 | /* | |
771 | * Yank. | |
772 | * | |
773 | * Yanking to string registers occurs for free (essentially) | |
774 | * in the routine xdw(). | |
775 | */ | |
776 | vyankit() | |
777 | { | |
778 | register int cnt; | |
779 | ||
780 | if (wdot) { | |
781 | if ((cnt = xdw()) < 0) | |
782 | return; | |
783 | vremote(cnt, yank, 0); | |
784 | setpk(); | |
785 | notenam = "yank"; | |
786 | vundkind = VNONE; | |
787 | DEL[0] = 0; | |
788 | wdot = NOLINE; | |
789 | if (notecnt <= vcnt - vcline && notecnt < value(REPORT)) | |
790 | notecnt = 0; | |
791 | vrepaint(cursor); | |
792 | return; | |
793 | } | |
794 | takeout(DEL); | |
795 | } | |
796 | ||
797 | /* | |
798 | * Set pkill variables so a put can | |
799 | * know how to put back partial text. | |
800 | * This is necessary because undo needs the complete | |
801 | * line images to be saved, while a put wants to trim | |
802 | * the first and last lines. The compromise | |
803 | * is for put to be more clever. | |
804 | */ | |
805 | setpk() | |
806 | { | |
807 | ||
808 | if (wcursor) { | |
809 | pkill[0] = cursor; | |
810 | pkill[1] = wcursor; | |
811 | } | |
812 | } |