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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(); | |
d266c416 | 53 | cursor = linebuf; |
79597adf MH |
54 | vfixcurs(); |
55 | } | |
56 | ||
d266c416 MH |
57 | vundo(show) |
58 | bool show; /* if true update the screen */ | |
79597adf MH |
59 | { |
60 | register int cnt; | |
61 | register line *addr; | |
62 | register char *cp; | |
63 | char temp[LBSIZE]; | |
64 | bool savenote; | |
65 | int (*OO)(); | |
66 | short oldhold = hold; | |
67 | ||
68 | switch (vundkind) { | |
69 | ||
70 | case VMANYINS: | |
71 | wcursor = 0; | |
72 | addr1 = undap1; | |
73 | addr2 = undap2 - 1; | |
74 | vsave(); | |
75 | YANKreg('1'); | |
76 | notecnt = 0; | |
77 | /* fall into ... */ | |
78 | ||
79 | case VMANY: | |
80 | case VMCHNG: | |
81 | vsave(); | |
82 | addr = dot - vcline; | |
83 | notecnt = 1; | |
84 | if (undkind == UNDPUT && undap1 == undap2) { | |
85 | beep(); | |
887e3e0d | 86 | break; |
79597adf MH |
87 | } |
88 | /* | |
89 | * Undo() call below basically replaces undap1 to undap2-1 | |
90 | * with dol through unddol-1. Hack screen image to | |
91 | * reflect this replacement. | |
92 | */ | |
d266c416 MH |
93 | if (show) |
94 | if (undkind == UNDMOVE) | |
95 | vdirty(0, LINES); | |
96 | else | |
97 | vreplace(undap1 - addr, undap2 - undap1, | |
98 | undkind == UNDPUT ? 0 : unddol - dol); | |
79597adf MH |
99 | savenote = notecnt; |
100 | undo(1); | |
d266c416 | 101 | if (show && (vundkind != VMCHNG || addr != dot)) |
79597adf MH |
102 | killU(); |
103 | vundkind = VMANY; | |
104 | cnt = dot - addr; | |
105 | if (cnt < 0 || cnt > vcnt || state != VISUAL) { | |
d266c416 MH |
106 | if (show) |
107 | vjumpto(dot, NOSTR, '.'); | |
887e3e0d | 108 | break; |
79597adf MH |
109 | } |
110 | if (!savenote) | |
111 | notecnt = 0; | |
d266c416 MH |
112 | if (show) { |
113 | vcline = cnt; | |
114 | vrepaint(vmcurs); | |
115 | } | |
79597adf | 116 | vmcurs = 0; |
887e3e0d | 117 | break; |
79597adf MH |
118 | |
119 | case VCHNG: | |
120 | case VCAPU: | |
121 | vundkind = VCHNG; | |
122 | strcpy(temp, vutmp); | |
123 | strcpy(vutmp, linebuf); | |
124 | doomed = column(vUA2 - 1) - column(vUA1 - 1); | |
125 | strcLIN(temp); | |
126 | cp = vUA1; vUA1 = vUD1; vUD1 = cp; | |
127 | cp = vUA2; vUA2 = vUD2; vUD2 = cp; | |
d266c416 MH |
128 | if (!show) |
129 | break; | |
79597adf MH |
130 | cursor = vUD1; |
131 | if (state == HARDOPEN) { | |
132 | doomed = 0; | |
133 | vsave(); | |
134 | vopen(dot, WBOT); | |
135 | vnline(cursor); | |
887e3e0d | 136 | break; |
79597adf MH |
137 | } |
138 | /* | |
139 | * Pseudo insert command. | |
140 | */ | |
141 | vcursat(cursor); | |
142 | OO = Outchar; Outchar = vinschar; hold |= HOLDQIK; | |
143 | vprepins(); | |
144 | temp[vUA2 - linebuf] = 0; | |
145 | for (cp = &temp[vUA1 - linebuf]; *cp;) | |
146 | putchar(*cp++); | |
147 | Outchar = OO; hold = oldhold; | |
148 | endim(); | |
149 | physdc(cindent(), cindent() + doomed); | |
150 | doomed = 0; | |
151 | vdirty(vcline, 1); | |
152 | vsyncCL(); | |
153 | if (cursor > linebuf && cursor >= strend(linebuf)) | |
154 | cursor--; | |
155 | vfixcurs(); | |
887e3e0d | 156 | break; |
79597adf MH |
157 | |
158 | case VNONE: | |
159 | beep(); | |
887e3e0d | 160 | break; |
79597adf MH |
161 | } |
162 | } | |
163 | ||
d266c416 MH |
164 | /* |
165 | * Routine to handle a change inside a macro. | |
166 | * Fromvis is true if we were called from a visual command (as | |
167 | * opposed to an ex command). This has nothing to do with being | |
168 | * in open/visual mode as :s/foo/bar is not fromvis. | |
169 | */ | |
170 | vmacchng(fromvis) | |
171 | bool fromvis; | |
172 | { | |
173 | line *savedot, *savedol; | |
174 | char *savecursor; | |
175 | int nlines, more; | |
176 | register line *a1, *a2; | |
177 | char ch; /* DEBUG */ | |
178 | int copyw(), copywR(); | |
179 | ||
180 | if (!inopen) | |
181 | return; | |
182 | if (!vmacp) | |
183 | vch_mac = VC_NOTINMAC; | |
184 | #ifdef TRACE | |
185 | if (trace) | |
186 | fprintf(trace, "vmacchng, vch_mac=%d, linebuf='%s', *dot=%o\n", vch_mac, linebuf, *dot); | |
187 | #endif | |
188 | if (vmacp && fromvis) | |
189 | vsave(); | |
190 | #ifdef TRACE | |
191 | if (trace) | |
192 | fprintf(trace, "after vsave, linebuf='%s', *dot=%o\n", linebuf, *dot); | |
193 | #endif | |
194 | switch(vch_mac) { | |
195 | case VC_NOCHANGE: | |
196 | vch_mac = VC_ONECHANGE; | |
197 | break; | |
198 | case VC_ONECHANGE: | |
199 | /* Save current state somewhere */ | |
200 | #ifdef TRACE | |
201 | vudump("before vmacchng hairy case"); | |
202 | #endif | |
203 | savedot = dot; savedol = dol; savecursor = cursor; | |
204 | nlines = dol - zero; | |
205 | while ((line *) endcore - truedol < nlines) | |
206 | morelines(); | |
207 | copyw(truedol+1, zero+1, nlines); | |
208 | truedol += nlines; | |
209 | ||
210 | #ifdef TRACE | |
211 | visdump("before vundo"); | |
212 | #endif | |
213 | /* Restore state as it was at beginning of macro */ | |
214 | vundo(0); | |
215 | #ifdef TRACE | |
216 | visdump("after vundo"); | |
217 | vudump("after vundo"); | |
218 | #endif | |
219 | ||
220 | /* Do the saveall we should have done then */ | |
221 | saveall(); | |
222 | #ifdef TRACE | |
223 | vudump("after saveall"); | |
224 | #endif | |
225 | ||
226 | /* Restore current state from where saved */ | |
227 | more = savedol - dol; /* amount we shift everything by */ | |
228 | if (more) | |
229 | (*(more>0 ? copywR : copyw))(savedol+1, dol+1, truedol-dol); | |
230 | unddol += more; truedol += more; | |
231 | ||
232 | truedol -= nlines; | |
233 | copyw(zero+1, truedol+1, nlines); | |
234 | dot = savedot; dol = savedol ; cursor = savecursor; | |
235 | vch_mac = VC_MANYCHANGE; | |
236 | ||
237 | /* Arrange that no further undo saving happens within macro */ | |
238 | otchng = tchng; /* Copied this line blindly - bug? */ | |
239 | inopen = -1; /* no need to save since it had to be 1 or -1 before */ | |
240 | vundkind = VMANY; | |
241 | #ifdef TRACE | |
242 | vudump("after vmacchng"); | |
243 | #endif | |
244 | break; | |
245 | case VC_NOTINMAC: | |
246 | case VC_MANYCHANGE: | |
247 | /* Nothing to do for various reasons. */ | |
248 | break; | |
249 | } | |
250 | } | |
251 | ||
79597adf MH |
252 | /* |
253 | * Initialize undo information before an append. | |
254 | */ | |
255 | vnoapp() | |
256 | { | |
257 | ||
258 | vUD1 = vUD2 = cursor; | |
259 | } | |
260 | ||
261 | /* | |
262 | * All the rest of the motion sequences have one or more | |
263 | * cases to deal with. In the case wdot == 0, operation | |
264 | * is totally within current line, from cursor to wcursor. | |
265 | * If wdot is given, but wcursor is 0, then operation affects | |
266 | * the inclusive line range. The hardest case is when both wdot | |
267 | * and wcursor are given, then operation affects from line dot at | |
268 | * cursor to line wdot at wcursor. | |
269 | */ | |
270 | ||
271 | /* | |
272 | * Move is simple, except for moving onto new lines in hardcopy open mode. | |
273 | */ | |
274 | vmove() | |
275 | { | |
276 | register int cnt; | |
277 | ||
278 | if (wdot) { | |
279 | if (wdot < one || wdot > dol) { | |
280 | beep(); | |
281 | return; | |
282 | } | |
283 | cnt = wdot - dot; | |
284 | wdot = NOLINE; | |
285 | if (cnt) | |
286 | killU(); | |
287 | vupdown(cnt, wcursor); | |
288 | return; | |
289 | } | |
290 | ||
291 | /* | |
292 | * When we move onto a new line, save information for U undo. | |
293 | */ | |
294 | if (vUNDdot != dot) { | |
295 | vUNDsav = *dot; | |
296 | vUNDcurs = wcursor; | |
297 | vUNDdot = dot; | |
298 | } | |
299 | ||
300 | /* | |
301 | * In hardcopy open, type characters to left of cursor | |
302 | * on new line, or back cursor up if its to left of where we are. | |
303 | * In any case if the current line is ``rubbled'' i.e. has trashy | |
304 | * looking overstrikes on it or \'s from deletes, we reprint | |
305 | * so it is more comprehensible (and also because we can't work | |
306 | * if we let it get more out of sync since column() won't work right. | |
307 | */ | |
308 | if (state == HARDOPEN) { | |
309 | register char *cp; | |
310 | if (rubble) { | |
311 | register int c; | |
312 | int oldhold = hold; | |
313 | ||
314 | sethard(); | |
315 | cp = wcursor; | |
316 | c = *cp; | |
317 | *cp = 0; | |
318 | hold |= HOLDDOL; | |
319 | vreopen(WTOP, lineDOT(), vcline); | |
320 | hold = oldhold; | |
321 | *cp = c; | |
322 | } else if (wcursor > cursor) { | |
323 | vfixcurs(); | |
324 | for (cp = cursor; *cp && cp < wcursor;) { | |
325 | register int c = *cp++ & TRIM; | |
326 | ||
327 | putchar(c ? c : ' '); | |
328 | } | |
329 | } | |
330 | } | |
331 | vsetcurs(wcursor); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Delete operator. | |
336 | * | |
337 | * Hard case of deleting a range where both wcursor and wdot | |
338 | * are specified is treated as a special case of change and handled | |
339 | * by vchange (although vchange may pass it back if it degenerates | |
340 | * to a full line range delete.) | |
341 | */ | |
342 | vdelete(c) | |
343 | char c; | |
344 | { | |
345 | register char *cp; | |
346 | register int i; | |
347 | ||
348 | if (wdot) { | |
349 | if (wcursor) { | |
350 | vchange('d'); | |
351 | return; | |
352 | } | |
353 | if ((i = xdw()) < 0) | |
354 | return; | |
355 | if (state != VISUAL) { | |
356 | vgoto(LINE(0), 0); | |
357 | vputchar('@'); | |
358 | } | |
359 | wdot = dot; | |
360 | vremote(i, delete, 0); | |
361 | notenam = "delete"; | |
362 | DEL[0] = 0; | |
363 | killU(); | |
364 | vreplace(vcline, i, 0); | |
365 | if (wdot > dol) | |
366 | vcline--; | |
367 | vrepaint(NOSTR); | |
368 | return; | |
369 | } | |
370 | if (wcursor < linebuf) | |
371 | wcursor = linebuf; | |
372 | if (cursor == wcursor) { | |
373 | beep(); | |
374 | return; | |
375 | } | |
376 | i = vdcMID(); | |
377 | cp = cursor; | |
378 | setDEL(); | |
379 | CP(cp, wcursor); | |
380 | if (cp > linebuf && (cp[0] == 0 || c == '#')) | |
381 | cp--; | |
382 | if (state == HARDOPEN) { | |
383 | bleep(i, cp); | |
384 | cursor = cp; | |
385 | return; | |
386 | } | |
387 | physdc(column(cursor - 1), i); | |
388 | DEPTH(vcline) = 0; | |
389 | vreopen(LINE(vcline), lineDOT(), vcline); | |
390 | vsyncCL(); | |
391 | vsetcurs(cp); | |
392 | } | |
393 | ||
394 | /* | |
395 | * Change operator. | |
396 | * | |
397 | * In a single line we mark the end of the changed area with '$'. | |
398 | * On multiple whole lines, we clear the lines first. | |
399 | * Across lines with both wcursor and wdot given, we delete | |
400 | * and sync then append (but one operation for undo). | |
401 | */ | |
402 | vchange(c) | |
403 | char c; | |
404 | { | |
405 | register char *cp; | |
406 | register int i, ind, cnt; | |
407 | line *addr; | |
408 | ||
409 | if (wdot) { | |
410 | /* | |
411 | * Change/delete of lines or across line boundaries. | |
412 | */ | |
413 | if ((cnt = xdw()) < 0) | |
414 | return; | |
415 | getDOT(); | |
416 | if (wcursor && cnt == 1) { | |
417 | /* | |
418 | * Not really. | |
419 | */ | |
420 | wdot = 0; | |
421 | if (c == 'd') { | |
422 | vdelete(c); | |
423 | return; | |
424 | } | |
425 | goto smallchange; | |
426 | } | |
427 | if (cursor && wcursor) { | |
428 | /* | |
429 | * Across line boundaries, but not | |
430 | * necessarily whole lines. | |
431 | * Construct what will be left. | |
432 | */ | |
433 | *cursor = 0; | |
434 | strcpy(genbuf, linebuf); | |
435 | getline(*wdot); | |
436 | if (strlen(genbuf) + strlen(wcursor) > LBSIZE - 2) { | |
437 | getDOT(); | |
438 | beep(); | |
439 | return; | |
440 | } | |
441 | strcat(genbuf, wcursor); | |
442 | if (c == 'd' && *vpastwh(genbuf) == 0) { | |
443 | /* | |
444 | * Although this is a delete | |
445 | * spanning line boundaries, what | |
446 | * would be left is all white space, | |
447 | * so take it all away. | |
448 | */ | |
449 | wcursor = 0; | |
450 | getDOT(); | |
451 | op = 0; | |
452 | notpart(lastreg); | |
453 | notpart('1'); | |
454 | vdelete(c); | |
455 | return; | |
456 | } | |
457 | ind = -1; | |
458 | } else if (c == 'd' && wcursor == 0) { | |
459 | vdelete(c); | |
460 | return; | |
461 | } else | |
462 | #ifdef LISPCODE | |
463 | /* | |
464 | * We are just substituting text for whole lines, | |
465 | * so determine the first autoindent. | |
466 | */ | |
467 | if (value(LISP) && value(AUTOINDENT)) | |
468 | ind = lindent(dot); | |
469 | else | |
470 | #endif | |
471 | ind = whitecnt(linebuf); | |
472 | i = vcline >= 0 ? LINE(vcline) : WTOP; | |
473 | ||
474 | /* | |
475 | * Delete the lines from the buffer, | |
476 | * and remember how the partial stuff came about in | |
477 | * case we are told to put. | |
478 | */ | |
479 | addr = dot; | |
480 | vremote(cnt, delete, 0); | |
481 | setpk(); | |
482 | notenam = "delete"; | |
483 | if (c != 'd') | |
484 | notenam = "change"; | |
485 | /* | |
486 | * If DEL[0] were nonzero, put would put it back | |
487 | * rather than the deleted lines. | |
488 | */ | |
489 | DEL[0] = 0; | |
490 | if (cnt > 1) | |
491 | killU(); | |
492 | ||
493 | /* | |
494 | * Now hack the screen image coordination. | |
495 | */ | |
496 | vreplace(vcline, cnt, 0); | |
497 | wdot = NOLINE; | |
498 | noteit(0); | |
499 | vcline--; | |
500 | if (addr <= dol) | |
501 | dot--; | |
502 | ||
503 | /* | |
504 | * If this is a across line delete/change, | |
505 | * cursor stays where it is; just splice together the pieces | |
506 | * of the new line. Otherwise generate a autoindent | |
507 | * after a S command. | |
508 | */ | |
509 | if (ind >= 0) { | |
510 | *genindent(ind) = 0; | |
511 | vdoappend(genbuf); | |
512 | } else { | |
513 | vmcurs = cursor; | |
514 | strcLIN(genbuf); | |
515 | vdoappend(linebuf); | |
516 | } | |
517 | ||
518 | /* | |
519 | * Indicate a change on hardcopies by | |
520 | * erasing the current line. | |
521 | */ | |
522 | if (c != 'd' && state != VISUAL && state != HARDOPEN) { | |
523 | int oldhold = hold; | |
524 | ||
525 | hold |= HOLDAT, vclrlin(i, dot), hold = oldhold; | |
526 | } | |
527 | ||
528 | /* | |
529 | * Open the line (logically) on the screen, and | |
530 | * update the screen tail. Unless we are really a delete | |
531 | * go off and gather up inserted characters. | |
532 | */ | |
533 | vcline++; | |
534 | if (vcline < 0) | |
535 | vcline = 0; | |
536 | vopen(dot, i); | |
537 | vsyncCL(); | |
538 | noteit(1); | |
539 | if (c != 'd') { | |
540 | if (ind >= 0) { | |
541 | cursor = linebuf; | |
542 | linebuf[0] = 0; | |
543 | vfixcurs(); | |
544 | } else { | |
545 | ind = 0; | |
546 | vcursat(cursor); | |
547 | } | |
548 | vappend('x', 1, ind); | |
549 | return; | |
550 | } | |
551 | if (*cursor == 0 && cursor > linebuf) | |
552 | cursor--; | |
553 | vrepaint(cursor); | |
554 | return; | |
555 | } | |
556 | ||
557 | smallchange: | |
558 | /* | |
559 | * The rest of this is just low level hacking on changes | |
560 | * of small numbers of characters. | |
561 | */ | |
562 | if (wcursor < linebuf) | |
563 | wcursor = linebuf; | |
564 | if (cursor == wcursor) { | |
565 | beep(); | |
566 | return; | |
567 | } | |
568 | i = vdcMID(); | |
569 | cp = cursor; | |
570 | if (state != HARDOPEN) | |
571 | vfixcurs(); | |
572 | ||
573 | /* | |
574 | * Put out the \\'s indicating changed text in hardcopy, | |
575 | * or mark the end of the change with $ if not hardcopy. | |
576 | */ | |
577 | if (state == HARDOPEN) | |
578 | bleep(i, cp); | |
579 | else { | |
580 | vcursbef(wcursor); | |
581 | putchar('$'); | |
582 | i = cindent(); | |
583 | } | |
584 | ||
585 | /* | |
586 | * Remember the deleted text for possible put, | |
587 | * and then prepare and execute the input portion of the change. | |
588 | */ | |
589 | cursor = cp; | |
590 | setDEL(); | |
591 | CP(cursor, wcursor); | |
592 | if (state != HARDOPEN) { | |
593 | vcursaft(cursor - 1); | |
594 | doomed = i - cindent(); | |
595 | } else { | |
596 | /* | |
597 | sethard(); | |
598 | wcursor = cursor; | |
599 | cursor = linebuf; | |
600 | vgoto(outline, value(NUMBER) << 3); | |
601 | vmove(); | |
602 | */ | |
603 | doomed = 0; | |
604 | } | |
605 | prepapp(); | |
606 | vappend('c', 1, 0); | |
607 | } | |
608 | ||
609 | /* | |
610 | * Open new lines. | |
611 | * | |
612 | * Tricky thing here is slowopen. This causes display updating | |
613 | * to be held off so that 300 baud dumb terminals don't lose badly. | |
614 | * This also suppressed counts, which otherwise say how many blank | |
615 | * space to open up. Counts are also suppressed on intelligent terminals. | |
616 | * Actually counts are obsoleted, since if your terminal is slow | |
617 | * you are better off with slowopen. | |
618 | */ | |
619 | voOpen(c, cnt) | |
620 | char c; | |
621 | register int cnt; | |
622 | { | |
623 | register int ind = 0, i; | |
624 | short oldhold = hold; | |
625 | ||
626 | if (value(SLOWOPEN) || value(REDRAW) && AL && DL) | |
627 | cnt = 1; | |
628 | vsave(); | |
629 | setLAST(); | |
630 | if (value(AUTOINDENT)) | |
631 | ind = whitecnt(linebuf); | |
632 | if (c == 'O') { | |
633 | vcline--; | |
634 | dot--; | |
635 | if (dot > zero) | |
636 | getDOT(); | |
637 | } | |
638 | if (value(AUTOINDENT)) { | |
639 | #ifdef LISPCODE | |
640 | if (value(LISP)) | |
641 | ind = lindent(dot + 1); | |
642 | #endif | |
643 | } | |
644 | killU(); | |
645 | prepapp(); | |
887e3e0d MH |
646 | if (FIXUNDO) |
647 | vundkind = VMANY; | |
79597adf MH |
648 | if (state != VISUAL) |
649 | c = WBOT + 1; | |
650 | else { | |
651 | c = vcline < 0 ? WTOP - cnt : LINE(vcline) + DEPTH(vcline); | |
652 | if (c < ZERO) | |
653 | c = ZERO; | |
654 | i = LINE(vcline + 1) - c; | |
655 | if (i < cnt && c <= WBOT && (!AL || !DL)) | |
656 | vinslin(c, cnt - i, vcline); | |
657 | } | |
658 | *genindent(ind) = 0; | |
659 | vdoappend(genbuf); | |
660 | vcline++; | |
661 | oldhold = hold; | |
662 | hold |= HOLDROL; | |
663 | vopen(dot, c); | |
664 | hold = oldhold; | |
665 | if (value(SLOWOPEN)) | |
666 | /* | |
667 | * Oh, so lazy! | |
668 | */ | |
669 | vscrap(); | |
670 | else | |
671 | vsync1(LINE(vcline)); | |
672 | cursor = linebuf; | |
673 | linebuf[0] = 0; | |
674 | vappend('o', 1, ind); | |
675 | } | |
676 | ||
677 | /* | |
678 | * > < and = shift operators. | |
679 | * | |
680 | * Note that =, which aligns lisp, is just a ragged sort of shift, | |
681 | * since it never distributes text between lines. | |
682 | */ | |
683 | char vshnam[2] = { 'x', 0 }; | |
684 | ||
685 | vshftop() | |
686 | { | |
687 | register line *addr; | |
688 | register int cnt; | |
689 | ||
690 | if ((cnt = xdw()) < 0) | |
691 | return; | |
692 | addr = dot; | |
693 | vremote(cnt, vshift, 0); | |
694 | vshnam[0] = op; | |
695 | notenam = vshnam; | |
696 | dot = addr; | |
697 | vreplace(vcline, cnt, cnt); | |
698 | if (state == HARDOPEN) | |
699 | vcnt = 0; | |
700 | vrepaint(NOSTR); | |
701 | } | |
702 | ||
703 | /* | |
704 | * !. | |
705 | * | |
706 | * Filter portions of the buffer through unix commands. | |
707 | */ | |
708 | vfilter() | |
709 | { | |
710 | register line *addr; | |
711 | register int cnt; | |
712 | char *oglobp, d; | |
713 | ||
714 | if ((cnt = xdw()) < 0) | |
715 | return; | |
716 | if (vglobp) | |
717 | vglobp = uxb; | |
718 | if (readecho('!')) | |
719 | return; | |
720 | oglobp = globp; globp = genbuf + 1; | |
721 | d = peekc; ungetchar(0); | |
722 | CATCH | |
723 | fixech(); | |
724 | unix0(0); | |
725 | ONERR | |
726 | splitw = 0; | |
727 | ungetchar(d); | |
728 | vrepaint(cursor); | |
729 | globp = oglobp; | |
730 | return; | |
731 | ENDCATCH | |
732 | ungetchar(d); globp = oglobp; | |
733 | addr = dot; | |
734 | CATCH | |
735 | vgoto(WECHO, 0); flusho(); | |
736 | vremote(cnt, filter, 2); | |
737 | ONERR | |
738 | vdirty(0, LINES); | |
739 | ENDCATCH | |
740 | if (dot == zero && dol > zero) | |
741 | dot = one; | |
742 | splitw = 0; | |
743 | notenam = ""; | |
887e3e0d MH |
744 | /* |
745 | * BUG: we shouldn't be depending on what undap2 and undap1 are, | |
746 | * since we may be inside a macro. What's really wanted is the | |
747 | * number of lines we read from the filter. However, the mistake | |
748 | * will be an overestimate so it only results in extra work, | |
749 | * it shouldn't cause any real screwups. | |
750 | */ | |
79597adf MH |
751 | vreplace(vcline, cnt, undap2 - undap1); |
752 | dot = addr; | |
753 | if (dot > dol) { | |
754 | dot--; | |
755 | vcline--; | |
756 | } | |
757 | vrepaint(NOSTR); | |
758 | } | |
759 | ||
760 | /* | |
761 | * Xdw exchanges dot and wdot if appropriate and also checks | |
762 | * that wdot is reasonable. Its name comes from | |
763 | * xchange dotand wdot | |
764 | */ | |
765 | xdw() | |
766 | { | |
767 | register char *cp; | |
768 | register int cnt; | |
769 | /* | |
770 | register int notp = 0; | |
771 | */ | |
772 | ||
773 | if (wdot == NOLINE || wdot < one || wdot > dol) { | |
774 | beep(); | |
775 | return (-1); | |
776 | } | |
777 | vsave(); | |
778 | setLAST(); | |
779 | if (dot > wdot) { | |
780 | register line *addr; | |
781 | ||
782 | vcline -= dot - wdot; | |
783 | addr = dot; dot = wdot; wdot = addr; | |
784 | cp = cursor; cursor = wcursor; wcursor = cp; | |
785 | } | |
786 | /* | |
787 | * If a region is specified but wcursor is at the begining | |
788 | * of the last line, then we move it to be the end of the | |
789 | * previous line (actually off the end). | |
790 | */ | |
791 | if (cursor && wcursor == linebuf && wdot > dot) { | |
792 | wdot--; | |
793 | getDOT(); | |
794 | if (vpastwh(linebuf) >= cursor) | |
795 | wcursor = 0; | |
796 | else { | |
797 | getline(*wdot); | |
798 | wcursor = strend(linebuf); | |
799 | getDOT(); | |
800 | } | |
801 | /* | |
802 | * Should prepare in caller for possible dot == wdot. | |
803 | */ | |
804 | } | |
805 | cnt = wdot - dot + 1; | |
806 | if (vreg) { | |
807 | vremote(cnt, YANKreg, vreg); | |
808 | /* | |
809 | if (notp) | |
810 | notpart(vreg); | |
811 | */ | |
812 | } | |
813 | ||
814 | /* | |
815 | * Kill buffer code. If delete operator is c or d, then save | |
816 | * the region in numbered buffers. | |
817 | * | |
818 | * BUG: This may be somewhat inefficient due | |
819 | * to the way named buffer are implemented, | |
820 | * necessitating some optimization. | |
821 | */ | |
822 | vreg = 0; | |
823 | if (any(op, "cd")) { | |
824 | vremote(cnt, YANKreg, '1'); | |
825 | /* | |
826 | if (notp) | |
827 | notpart('1'); | |
828 | */ | |
829 | } | |
830 | return (cnt); | |
831 | } | |
832 | ||
833 | /* | |
834 | * Routine for vremote to call to implement shifts. | |
835 | */ | |
836 | vshift() | |
837 | { | |
838 | ||
839 | shift(op, 1); | |
840 | } | |
841 | ||
842 | /* | |
843 | * Replace a single character with the next input character. | |
844 | * A funny kind of insert. | |
845 | */ | |
846 | vrep(cnt) | |
847 | register int cnt; | |
848 | { | |
849 | register int i, c; | |
850 | ||
851 | if (cnt > strlen(cursor)) { | |
852 | beep(); | |
853 | return; | |
854 | } | |
855 | i = column(cursor + cnt - 1); | |
856 | vcursat(cursor); | |
857 | doomed = i - cindent(); | |
858 | if (!vglobp) { | |
859 | c = getesc(); | |
860 | if (c == 0) { | |
861 | vfixcurs(); | |
862 | return; | |
863 | } | |
864 | ungetkey(c); | |
865 | } | |
866 | CP(vutmp, linebuf); | |
887e3e0d MH |
867 | if (FIXUNDO) |
868 | vundkind = VCHNG; | |
79597adf MH |
869 | wcursor = cursor + cnt; |
870 | vUD1 = cursor; vUD2 = wcursor; | |
871 | CP(cursor, wcursor); | |
872 | prepapp(); | |
873 | vappend('r', cnt, 0); | |
874 | *lastcp++ = INS[0]; | |
875 | setLAST(); | |
876 | } | |
877 | ||
878 | /* | |
879 | * Yank. | |
880 | * | |
881 | * Yanking to string registers occurs for free (essentially) | |
882 | * in the routine xdw(). | |
883 | */ | |
884 | vyankit() | |
885 | { | |
886 | register int cnt; | |
887 | ||
888 | if (wdot) { | |
889 | if ((cnt = xdw()) < 0) | |
890 | return; | |
891 | vremote(cnt, yank, 0); | |
892 | setpk(); | |
893 | notenam = "yank"; | |
887e3e0d MH |
894 | if (FIXUNDO) |
895 | vundkind = VNONE; | |
79597adf MH |
896 | DEL[0] = 0; |
897 | wdot = NOLINE; | |
898 | if (notecnt <= vcnt - vcline && notecnt < value(REPORT)) | |
899 | notecnt = 0; | |
900 | vrepaint(cursor); | |
901 | return; | |
902 | } | |
903 | takeout(DEL); | |
904 | } | |
905 | ||
906 | /* | |
907 | * Set pkill variables so a put can | |
908 | * know how to put back partial text. | |
909 | * This is necessary because undo needs the complete | |
910 | * line images to be saved, while a put wants to trim | |
911 | * the first and last lines. The compromise | |
912 | * is for put to be more clever. | |
913 | */ | |
914 | setpk() | |
915 | { | |
916 | ||
917 | if (wcursor) { | |
918 | pkill[0] = cursor; | |
919 | pkill[1] = wcursor; | |
920 | } | |
921 | } |