Commit | Line | Data |
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7c4625ef | 1 | /* Copyright (c) 1980 Regents of the University of California */ |
b41bbcb5 | 2 | static char *sccsid = "@(#)ex_vops.c 5.1 %G%"; |
79597adf MH |
3 | #include "ex.h" |
4 | #include "ex_tty.h" | |
5 | #include "ex_vis.h" | |
6 | ||
7 | /* | |
8 | * This file defines the operation sequences which interface the | |
9 | * logical changes to the file buffer with the internal and external | |
10 | * display representations. | |
11 | */ | |
12 | ||
13 | /* | |
14 | * Undo. | |
15 | * | |
16 | * Undo is accomplished in two ways. We often for small changes in the | |
17 | * current line know how (in terms of a change operator) how the change | |
18 | * occurred. Thus on an intelligent terminal we can undo the operation | |
19 | * by another such operation, using insert and delete character | |
20 | * stuff. The pointers vU[AD][12] index the buffer vutmp when this | |
21 | * is possible and provide the necessary information. | |
22 | * | |
23 | * The other case is that the change involved multiple lines or that | |
24 | * we have moved away from the line or forgotten how the change was | |
25 | * accomplished. In this case we do a redisplay and hope that the | |
26 | * low level optimization routines (which don't look for winning | |
27 | * via insert/delete character) will not lose too badly. | |
28 | */ | |
29 | char *vUA1, *vUA2; | |
30 | char *vUD1, *vUD2; | |
31 | ||
32 | vUndo() | |
33 | { | |
34 | ||
35 | /* | |
36 | * Avoid UU which clobbers ability to do u. | |
37 | */ | |
38 | if (vundkind == VCAPU || vUNDdot != dot) { | |
39 | beep(); | |
40 | return; | |
41 | } | |
42 | CP(vutmp, linebuf); | |
43 | vUD1 = linebuf; vUD2 = strend(linebuf); | |
44 | putmk1(dot, vUNDsav); | |
45 | getDOT(); | |
46 | vUA1 = linebuf; vUA2 = strend(linebuf); | |
47 | vundkind = VCAPU; | |
48 | if (state == ONEOPEN || state == HARDOPEN) { | |
49 | vjumpto(dot, vUNDcurs, 0); | |
50 | return; | |
51 | } | |
52 | vdirty(vcline, 1); | |
53 | vsyncCL(); | |
d266c416 | 54 | cursor = linebuf; |
79597adf MH |
55 | vfixcurs(); |
56 | } | |
57 | ||
d266c416 MH |
58 | vundo(show) |
59 | bool show; /* if true update the screen */ | |
79597adf MH |
60 | { |
61 | register int cnt; | |
62 | register line *addr; | |
63 | register char *cp; | |
64 | char temp[LBSIZE]; | |
65 | bool savenote; | |
66 | int (*OO)(); | |
67 | short oldhold = hold; | |
68 | ||
69 | switch (vundkind) { | |
70 | ||
71 | case VMANYINS: | |
72 | wcursor = 0; | |
73 | addr1 = undap1; | |
74 | addr2 = undap2 - 1; | |
75 | vsave(); | |
76 | YANKreg('1'); | |
77 | notecnt = 0; | |
78 | /* fall into ... */ | |
79 | ||
80 | case VMANY: | |
81 | case VMCHNG: | |
82 | vsave(); | |
83 | addr = dot - vcline; | |
84 | notecnt = 1; | |
85 | if (undkind == UNDPUT && undap1 == undap2) { | |
86 | beep(); | |
887e3e0d | 87 | break; |
79597adf MH |
88 | } |
89 | /* | |
90 | * Undo() call below basically replaces undap1 to undap2-1 | |
91 | * with dol through unddol-1. Hack screen image to | |
92 | * reflect this replacement. | |
93 | */ | |
d266c416 MH |
94 | if (show) |
95 | if (undkind == UNDMOVE) | |
96 | vdirty(0, LINES); | |
97 | else | |
98 | vreplace(undap1 - addr, undap2 - undap1, | |
99 | undkind == UNDPUT ? 0 : unddol - dol); | |
79597adf MH |
100 | savenote = notecnt; |
101 | undo(1); | |
d266c416 | 102 | if (show && (vundkind != VMCHNG || addr != dot)) |
79597adf MH |
103 | killU(); |
104 | vundkind = VMANY; | |
105 | cnt = dot - addr; | |
106 | if (cnt < 0 || cnt > vcnt || state != VISUAL) { | |
d266c416 MH |
107 | if (show) |
108 | vjumpto(dot, NOSTR, '.'); | |
887e3e0d | 109 | break; |
79597adf MH |
110 | } |
111 | if (!savenote) | |
112 | notecnt = 0; | |
d266c416 MH |
113 | if (show) { |
114 | vcline = cnt; | |
115 | vrepaint(vmcurs); | |
116 | } | |
79597adf | 117 | vmcurs = 0; |
887e3e0d | 118 | break; |
79597adf MH |
119 | |
120 | case VCHNG: | |
121 | case VCAPU: | |
122 | vundkind = VCHNG; | |
123 | strcpy(temp, vutmp); | |
124 | strcpy(vutmp, linebuf); | |
125 | doomed = column(vUA2 - 1) - column(vUA1 - 1); | |
126 | strcLIN(temp); | |
127 | cp = vUA1; vUA1 = vUD1; vUD1 = cp; | |
128 | cp = vUA2; vUA2 = vUD2; vUD2 = cp; | |
d266c416 MH |
129 | if (!show) |
130 | break; | |
79597adf MH |
131 | cursor = vUD1; |
132 | if (state == HARDOPEN) { | |
133 | doomed = 0; | |
134 | vsave(); | |
135 | vopen(dot, WBOT); | |
136 | vnline(cursor); | |
887e3e0d | 137 | break; |
79597adf MH |
138 | } |
139 | /* | |
140 | * Pseudo insert command. | |
141 | */ | |
142 | vcursat(cursor); | |
143 | OO = Outchar; Outchar = vinschar; hold |= HOLDQIK; | |
144 | vprepins(); | |
145 | temp[vUA2 - linebuf] = 0; | |
146 | for (cp = &temp[vUA1 - linebuf]; *cp;) | |
147 | putchar(*cp++); | |
148 | Outchar = OO; hold = oldhold; | |
149 | endim(); | |
150 | physdc(cindent(), cindent() + doomed); | |
151 | doomed = 0; | |
152 | vdirty(vcline, 1); | |
153 | vsyncCL(); | |
154 | if (cursor > linebuf && cursor >= strend(linebuf)) | |
155 | cursor--; | |
156 | vfixcurs(); | |
887e3e0d | 157 | break; |
79597adf MH |
158 | |
159 | case VNONE: | |
160 | beep(); | |
887e3e0d | 161 | break; |
79597adf MH |
162 | } |
163 | } | |
164 | ||
d266c416 MH |
165 | /* |
166 | * Routine to handle a change inside a macro. | |
167 | * Fromvis is true if we were called from a visual command (as | |
168 | * opposed to an ex command). This has nothing to do with being | |
169 | * in open/visual mode as :s/foo/bar is not fromvis. | |
170 | */ | |
171 | vmacchng(fromvis) | |
172 | bool fromvis; | |
173 | { | |
174 | line *savedot, *savedol; | |
175 | char *savecursor; | |
176 | int nlines, more; | |
177 | register line *a1, *a2; | |
178 | char ch; /* DEBUG */ | |
179 | int copyw(), copywR(); | |
180 | ||
181 | if (!inopen) | |
182 | return; | |
183 | if (!vmacp) | |
184 | vch_mac = VC_NOTINMAC; | |
185 | #ifdef TRACE | |
186 | if (trace) | |
187 | fprintf(trace, "vmacchng, vch_mac=%d, linebuf='%s', *dot=%o\n", vch_mac, linebuf, *dot); | |
188 | #endif | |
189 | if (vmacp && fromvis) | |
190 | vsave(); | |
191 | #ifdef TRACE | |
192 | if (trace) | |
193 | fprintf(trace, "after vsave, linebuf='%s', *dot=%o\n", linebuf, *dot); | |
194 | #endif | |
195 | switch(vch_mac) { | |
196 | case VC_NOCHANGE: | |
197 | vch_mac = VC_ONECHANGE; | |
198 | break; | |
199 | case VC_ONECHANGE: | |
200 | /* Save current state somewhere */ | |
201 | #ifdef TRACE | |
202 | vudump("before vmacchng hairy case"); | |
203 | #endif | |
204 | savedot = dot; savedol = dol; savecursor = cursor; | |
205 | nlines = dol - zero; | |
206 | while ((line *) endcore - truedol < nlines) | |
207 | morelines(); | |
208 | copyw(truedol+1, zero+1, nlines); | |
209 | truedol += nlines; | |
210 | ||
211 | #ifdef TRACE | |
212 | visdump("before vundo"); | |
213 | #endif | |
214 | /* Restore state as it was at beginning of macro */ | |
215 | vundo(0); | |
216 | #ifdef TRACE | |
217 | visdump("after vundo"); | |
218 | vudump("after vundo"); | |
219 | #endif | |
220 | ||
221 | /* Do the saveall we should have done then */ | |
222 | saveall(); | |
223 | #ifdef TRACE | |
224 | vudump("after saveall"); | |
225 | #endif | |
226 | ||
227 | /* Restore current state from where saved */ | |
228 | more = savedol - dol; /* amount we shift everything by */ | |
229 | if (more) | |
230 | (*(more>0 ? copywR : copyw))(savedol+1, dol+1, truedol-dol); | |
231 | unddol += more; truedol += more; | |
232 | ||
233 | truedol -= nlines; | |
234 | copyw(zero+1, truedol+1, nlines); | |
235 | dot = savedot; dol = savedol ; cursor = savecursor; | |
236 | vch_mac = VC_MANYCHANGE; | |
237 | ||
238 | /* Arrange that no further undo saving happens within macro */ | |
239 | otchng = tchng; /* Copied this line blindly - bug? */ | |
240 | inopen = -1; /* no need to save since it had to be 1 or -1 before */ | |
241 | vundkind = VMANY; | |
242 | #ifdef TRACE | |
243 | vudump("after vmacchng"); | |
244 | #endif | |
245 | break; | |
246 | case VC_NOTINMAC: | |
247 | case VC_MANYCHANGE: | |
248 | /* Nothing to do for various reasons. */ | |
249 | break; | |
250 | } | |
251 | } | |
252 | ||
79597adf MH |
253 | /* |
254 | * Initialize undo information before an append. | |
255 | */ | |
256 | vnoapp() | |
257 | { | |
258 | ||
259 | vUD1 = vUD2 = cursor; | |
260 | } | |
261 | ||
262 | /* | |
263 | * All the rest of the motion sequences have one or more | |
264 | * cases to deal with. In the case wdot == 0, operation | |
265 | * is totally within current line, from cursor to wcursor. | |
266 | * If wdot is given, but wcursor is 0, then operation affects | |
267 | * the inclusive line range. The hardest case is when both wdot | |
268 | * and wcursor are given, then operation affects from line dot at | |
269 | * cursor to line wdot at wcursor. | |
270 | */ | |
271 | ||
272 | /* | |
273 | * Move is simple, except for moving onto new lines in hardcopy open mode. | |
274 | */ | |
275 | vmove() | |
276 | { | |
277 | register int cnt; | |
278 | ||
279 | if (wdot) { | |
280 | if (wdot < one || wdot > dol) { | |
281 | beep(); | |
282 | return; | |
283 | } | |
284 | cnt = wdot - dot; | |
285 | wdot = NOLINE; | |
286 | if (cnt) | |
287 | killU(); | |
288 | vupdown(cnt, wcursor); | |
289 | return; | |
290 | } | |
291 | ||
292 | /* | |
293 | * When we move onto a new line, save information for U undo. | |
294 | */ | |
295 | if (vUNDdot != dot) { | |
296 | vUNDsav = *dot; | |
297 | vUNDcurs = wcursor; | |
298 | vUNDdot = dot; | |
299 | } | |
300 | ||
301 | /* | |
302 | * In hardcopy open, type characters to left of cursor | |
303 | * on new line, or back cursor up if its to left of where we are. | |
304 | * In any case if the current line is ``rubbled'' i.e. has trashy | |
305 | * looking overstrikes on it or \'s from deletes, we reprint | |
306 | * so it is more comprehensible (and also because we can't work | |
307 | * if we let it get more out of sync since column() won't work right. | |
308 | */ | |
309 | if (state == HARDOPEN) { | |
310 | register char *cp; | |
311 | if (rubble) { | |
312 | register int c; | |
313 | int oldhold = hold; | |
314 | ||
315 | sethard(); | |
316 | cp = wcursor; | |
317 | c = *cp; | |
318 | *cp = 0; | |
319 | hold |= HOLDDOL; | |
320 | vreopen(WTOP, lineDOT(), vcline); | |
321 | hold = oldhold; | |
322 | *cp = c; | |
323 | } else if (wcursor > cursor) { | |
324 | vfixcurs(); | |
325 | for (cp = cursor; *cp && cp < wcursor;) { | |
326 | register int c = *cp++ & TRIM; | |
327 | ||
328 | putchar(c ? c : ' '); | |
329 | } | |
330 | } | |
331 | } | |
332 | vsetcurs(wcursor); | |
333 | } | |
334 | ||
335 | /* | |
336 | * Delete operator. | |
337 | * | |
338 | * Hard case of deleting a range where both wcursor and wdot | |
339 | * are specified is treated as a special case of change and handled | |
340 | * by vchange (although vchange may pass it back if it degenerates | |
341 | * to a full line range delete.) | |
342 | */ | |
343 | vdelete(c) | |
344 | char c; | |
345 | { | |
346 | register char *cp; | |
347 | register int i; | |
348 | ||
349 | if (wdot) { | |
350 | if (wcursor) { | |
351 | vchange('d'); | |
352 | return; | |
353 | } | |
354 | if ((i = xdw()) < 0) | |
355 | return; | |
356 | if (state != VISUAL) { | |
357 | vgoto(LINE(0), 0); | |
358 | vputchar('@'); | |
359 | } | |
360 | wdot = dot; | |
361 | vremote(i, delete, 0); | |
362 | notenam = "delete"; | |
363 | DEL[0] = 0; | |
364 | killU(); | |
365 | vreplace(vcline, i, 0); | |
366 | if (wdot > dol) | |
367 | vcline--; | |
368 | vrepaint(NOSTR); | |
369 | return; | |
370 | } | |
371 | if (wcursor < linebuf) | |
372 | wcursor = linebuf; | |
373 | if (cursor == wcursor) { | |
374 | beep(); | |
375 | return; | |
376 | } | |
377 | i = vdcMID(); | |
378 | cp = cursor; | |
379 | setDEL(); | |
380 | CP(cp, wcursor); | |
381 | if (cp > linebuf && (cp[0] == 0 || c == '#')) | |
382 | cp--; | |
383 | if (state == HARDOPEN) { | |
384 | bleep(i, cp); | |
385 | cursor = cp; | |
386 | return; | |
387 | } | |
388 | physdc(column(cursor - 1), i); | |
389 | DEPTH(vcline) = 0; | |
390 | vreopen(LINE(vcline), lineDOT(), vcline); | |
391 | vsyncCL(); | |
392 | vsetcurs(cp); | |
393 | } | |
394 | ||
395 | /* | |
396 | * Change operator. | |
397 | * | |
398 | * In a single line we mark the end of the changed area with '$'. | |
399 | * On multiple whole lines, we clear the lines first. | |
400 | * Across lines with both wcursor and wdot given, we delete | |
401 | * and sync then append (but one operation for undo). | |
402 | */ | |
403 | vchange(c) | |
404 | char c; | |
405 | { | |
406 | register char *cp; | |
407 | register int i, ind, cnt; | |
408 | line *addr; | |
409 | ||
410 | if (wdot) { | |
411 | /* | |
412 | * Change/delete of lines or across line boundaries. | |
413 | */ | |
414 | if ((cnt = xdw()) < 0) | |
415 | return; | |
416 | getDOT(); | |
417 | if (wcursor && cnt == 1) { | |
418 | /* | |
419 | * Not really. | |
420 | */ | |
421 | wdot = 0; | |
422 | if (c == 'd') { | |
423 | vdelete(c); | |
424 | return; | |
425 | } | |
426 | goto smallchange; | |
427 | } | |
428 | if (cursor && wcursor) { | |
429 | /* | |
430 | * Across line boundaries, but not | |
431 | * necessarily whole lines. | |
432 | * Construct what will be left. | |
433 | */ | |
434 | *cursor = 0; | |
435 | strcpy(genbuf, linebuf); | |
436 | getline(*wdot); | |
437 | if (strlen(genbuf) + strlen(wcursor) > LBSIZE - 2) { | |
438 | getDOT(); | |
439 | beep(); | |
440 | return; | |
441 | } | |
442 | strcat(genbuf, wcursor); | |
443 | if (c == 'd' && *vpastwh(genbuf) == 0) { | |
444 | /* | |
445 | * Although this is a delete | |
446 | * spanning line boundaries, what | |
447 | * would be left is all white space, | |
448 | * so take it all away. | |
449 | */ | |
450 | wcursor = 0; | |
451 | getDOT(); | |
452 | op = 0; | |
453 | notpart(lastreg); | |
454 | notpart('1'); | |
455 | vdelete(c); | |
456 | return; | |
457 | } | |
458 | ind = -1; | |
459 | } else if (c == 'd' && wcursor == 0) { | |
460 | vdelete(c); | |
461 | return; | |
462 | } else | |
463 | #ifdef LISPCODE | |
464 | /* | |
465 | * We are just substituting text for whole lines, | |
466 | * so determine the first autoindent. | |
467 | */ | |
468 | if (value(LISP) && value(AUTOINDENT)) | |
469 | ind = lindent(dot); | |
470 | else | |
471 | #endif | |
472 | ind = whitecnt(linebuf); | |
473 | i = vcline >= 0 ? LINE(vcline) : WTOP; | |
474 | ||
475 | /* | |
476 | * Delete the lines from the buffer, | |
477 | * and remember how the partial stuff came about in | |
478 | * case we are told to put. | |
479 | */ | |
480 | addr = dot; | |
481 | vremote(cnt, delete, 0); | |
482 | setpk(); | |
483 | notenam = "delete"; | |
484 | if (c != 'd') | |
485 | notenam = "change"; | |
486 | /* | |
487 | * If DEL[0] were nonzero, put would put it back | |
488 | * rather than the deleted lines. | |
489 | */ | |
490 | DEL[0] = 0; | |
491 | if (cnt > 1) | |
492 | killU(); | |
493 | ||
494 | /* | |
495 | * Now hack the screen image coordination. | |
496 | */ | |
497 | vreplace(vcline, cnt, 0); | |
498 | wdot = NOLINE; | |
499 | noteit(0); | |
500 | vcline--; | |
501 | if (addr <= dol) | |
502 | dot--; | |
503 | ||
504 | /* | |
505 | * If this is a across line delete/change, | |
506 | * cursor stays where it is; just splice together the pieces | |
507 | * of the new line. Otherwise generate a autoindent | |
508 | * after a S command. | |
509 | */ | |
510 | if (ind >= 0) { | |
511 | *genindent(ind) = 0; | |
512 | vdoappend(genbuf); | |
513 | } else { | |
514 | vmcurs = cursor; | |
515 | strcLIN(genbuf); | |
516 | vdoappend(linebuf); | |
517 | } | |
518 | ||
519 | /* | |
520 | * Indicate a change on hardcopies by | |
521 | * erasing the current line. | |
522 | */ | |
523 | if (c != 'd' && state != VISUAL && state != HARDOPEN) { | |
524 | int oldhold = hold; | |
525 | ||
526 | hold |= HOLDAT, vclrlin(i, dot), hold = oldhold; | |
527 | } | |
528 | ||
529 | /* | |
530 | * Open the line (logically) on the screen, and | |
531 | * update the screen tail. Unless we are really a delete | |
532 | * go off and gather up inserted characters. | |
533 | */ | |
534 | vcline++; | |
535 | if (vcline < 0) | |
536 | vcline = 0; | |
537 | vopen(dot, i); | |
538 | vsyncCL(); | |
539 | noteit(1); | |
540 | if (c != 'd') { | |
541 | if (ind >= 0) { | |
542 | cursor = linebuf; | |
543 | linebuf[0] = 0; | |
544 | vfixcurs(); | |
545 | } else { | |
546 | ind = 0; | |
547 | vcursat(cursor); | |
548 | } | |
549 | vappend('x', 1, ind); | |
550 | return; | |
551 | } | |
552 | if (*cursor == 0 && cursor > linebuf) | |
553 | cursor--; | |
554 | vrepaint(cursor); | |
555 | return; | |
556 | } | |
557 | ||
558 | smallchange: | |
559 | /* | |
560 | * The rest of this is just low level hacking on changes | |
561 | * of small numbers of characters. | |
562 | */ | |
563 | if (wcursor < linebuf) | |
564 | wcursor = linebuf; | |
565 | if (cursor == wcursor) { | |
566 | beep(); | |
567 | return; | |
568 | } | |
569 | i = vdcMID(); | |
570 | cp = cursor; | |
571 | if (state != HARDOPEN) | |
572 | vfixcurs(); | |
573 | ||
574 | /* | |
575 | * Put out the \\'s indicating changed text in hardcopy, | |
576 | * or mark the end of the change with $ if not hardcopy. | |
577 | */ | |
578 | if (state == HARDOPEN) | |
579 | bleep(i, cp); | |
580 | else { | |
581 | vcursbef(wcursor); | |
582 | putchar('$'); | |
583 | i = cindent(); | |
584 | } | |
585 | ||
586 | /* | |
587 | * Remember the deleted text for possible put, | |
588 | * and then prepare and execute the input portion of the change. | |
589 | */ | |
590 | cursor = cp; | |
591 | setDEL(); | |
592 | CP(cursor, wcursor); | |
593 | if (state != HARDOPEN) { | |
594 | vcursaft(cursor - 1); | |
595 | doomed = i - cindent(); | |
596 | } else { | |
597 | /* | |
598 | sethard(); | |
599 | wcursor = cursor; | |
600 | cursor = linebuf; | |
601 | vgoto(outline, value(NUMBER) << 3); | |
602 | vmove(); | |
603 | */ | |
604 | doomed = 0; | |
605 | } | |
606 | prepapp(); | |
607 | vappend('c', 1, 0); | |
608 | } | |
609 | ||
610 | /* | |
611 | * Open new lines. | |
612 | * | |
613 | * Tricky thing here is slowopen. This causes display updating | |
614 | * to be held off so that 300 baud dumb terminals don't lose badly. | |
615 | * This also suppressed counts, which otherwise say how many blank | |
616 | * space to open up. Counts are also suppressed on intelligent terminals. | |
617 | * Actually counts are obsoleted, since if your terminal is slow | |
618 | * you are better off with slowopen. | |
619 | */ | |
620 | voOpen(c, cnt) | |
621 | char c; | |
622 | register int cnt; | |
623 | { | |
624 | register int ind = 0, i; | |
625 | short oldhold = hold; | |
626 | ||
627 | if (value(SLOWOPEN) || value(REDRAW) && AL && DL) | |
628 | cnt = 1; | |
629 | vsave(); | |
630 | setLAST(); | |
631 | if (value(AUTOINDENT)) | |
632 | ind = whitecnt(linebuf); | |
633 | if (c == 'O') { | |
634 | vcline--; | |
635 | dot--; | |
636 | if (dot > zero) | |
637 | getDOT(); | |
638 | } | |
639 | if (value(AUTOINDENT)) { | |
640 | #ifdef LISPCODE | |
641 | if (value(LISP)) | |
642 | ind = lindent(dot + 1); | |
643 | #endif | |
644 | } | |
645 | killU(); | |
646 | prepapp(); | |
887e3e0d MH |
647 | if (FIXUNDO) |
648 | vundkind = VMANY; | |
79597adf MH |
649 | if (state != VISUAL) |
650 | c = WBOT + 1; | |
651 | else { | |
652 | c = vcline < 0 ? WTOP - cnt : LINE(vcline) + DEPTH(vcline); | |
653 | if (c < ZERO) | |
654 | c = ZERO; | |
655 | i = LINE(vcline + 1) - c; | |
656 | if (i < cnt && c <= WBOT && (!AL || !DL)) | |
657 | vinslin(c, cnt - i, vcline); | |
658 | } | |
659 | *genindent(ind) = 0; | |
660 | vdoappend(genbuf); | |
661 | vcline++; | |
662 | oldhold = hold; | |
663 | hold |= HOLDROL; | |
664 | vopen(dot, c); | |
665 | hold = oldhold; | |
666 | if (value(SLOWOPEN)) | |
667 | /* | |
668 | * Oh, so lazy! | |
669 | */ | |
670 | vscrap(); | |
671 | else | |
672 | vsync1(LINE(vcline)); | |
673 | cursor = linebuf; | |
674 | linebuf[0] = 0; | |
675 | vappend('o', 1, ind); | |
676 | } | |
677 | ||
678 | /* | |
679 | * > < and = shift operators. | |
680 | * | |
681 | * Note that =, which aligns lisp, is just a ragged sort of shift, | |
682 | * since it never distributes text between lines. | |
683 | */ | |
684 | char vshnam[2] = { 'x', 0 }; | |
685 | ||
686 | vshftop() | |
687 | { | |
688 | register line *addr; | |
689 | register int cnt; | |
690 | ||
691 | if ((cnt = xdw()) < 0) | |
692 | return; | |
693 | addr = dot; | |
694 | vremote(cnt, vshift, 0); | |
695 | vshnam[0] = op; | |
696 | notenam = vshnam; | |
697 | dot = addr; | |
698 | vreplace(vcline, cnt, cnt); | |
699 | if (state == HARDOPEN) | |
700 | vcnt = 0; | |
701 | vrepaint(NOSTR); | |
702 | } | |
703 | ||
704 | /* | |
705 | * !. | |
706 | * | |
707 | * Filter portions of the buffer through unix commands. | |
708 | */ | |
709 | vfilter() | |
710 | { | |
711 | register line *addr; | |
712 | register int cnt; | |
713 | char *oglobp, d; | |
714 | ||
715 | if ((cnt = xdw()) < 0) | |
716 | return; | |
717 | if (vglobp) | |
718 | vglobp = uxb; | |
719 | if (readecho('!')) | |
720 | return; | |
721 | oglobp = globp; globp = genbuf + 1; | |
722 | d = peekc; ungetchar(0); | |
723 | CATCH | |
724 | fixech(); | |
725 | unix0(0); | |
726 | ONERR | |
727 | splitw = 0; | |
728 | ungetchar(d); | |
729 | vrepaint(cursor); | |
730 | globp = oglobp; | |
731 | return; | |
732 | ENDCATCH | |
733 | ungetchar(d); globp = oglobp; | |
734 | addr = dot; | |
735 | CATCH | |
736 | vgoto(WECHO, 0); flusho(); | |
737 | vremote(cnt, filter, 2); | |
738 | ONERR | |
739 | vdirty(0, LINES); | |
740 | ENDCATCH | |
741 | if (dot == zero && dol > zero) | |
742 | dot = one; | |
743 | splitw = 0; | |
744 | notenam = ""; | |
887e3e0d MH |
745 | /* |
746 | * BUG: we shouldn't be depending on what undap2 and undap1 are, | |
747 | * since we may be inside a macro. What's really wanted is the | |
748 | * number of lines we read from the filter. However, the mistake | |
749 | * will be an overestimate so it only results in extra work, | |
750 | * it shouldn't cause any real screwups. | |
751 | */ | |
79597adf MH |
752 | vreplace(vcline, cnt, undap2 - undap1); |
753 | dot = addr; | |
754 | if (dot > dol) { | |
755 | dot--; | |
756 | vcline--; | |
757 | } | |
758 | vrepaint(NOSTR); | |
759 | } | |
760 | ||
761 | /* | |
762 | * Xdw exchanges dot and wdot if appropriate and also checks | |
763 | * that wdot is reasonable. Its name comes from | |
764 | * xchange dotand wdot | |
765 | */ | |
766 | xdw() | |
767 | { | |
768 | register char *cp; | |
769 | register int cnt; | |
770 | /* | |
771 | register int notp = 0; | |
772 | */ | |
773 | ||
774 | if (wdot == NOLINE || wdot < one || wdot > dol) { | |
775 | beep(); | |
776 | return (-1); | |
777 | } | |
778 | vsave(); | |
779 | setLAST(); | |
780 | if (dot > wdot) { | |
781 | register line *addr; | |
782 | ||
783 | vcline -= dot - wdot; | |
784 | addr = dot; dot = wdot; wdot = addr; | |
785 | cp = cursor; cursor = wcursor; wcursor = cp; | |
786 | } | |
787 | /* | |
788 | * If a region is specified but wcursor is at the begining | |
789 | * of the last line, then we move it to be the end of the | |
790 | * previous line (actually off the end). | |
791 | */ | |
792 | if (cursor && wcursor == linebuf && wdot > dot) { | |
793 | wdot--; | |
794 | getDOT(); | |
795 | if (vpastwh(linebuf) >= cursor) | |
796 | wcursor = 0; | |
797 | else { | |
798 | getline(*wdot); | |
799 | wcursor = strend(linebuf); | |
800 | getDOT(); | |
801 | } | |
802 | /* | |
803 | * Should prepare in caller for possible dot == wdot. | |
804 | */ | |
805 | } | |
806 | cnt = wdot - dot + 1; | |
807 | if (vreg) { | |
808 | vremote(cnt, YANKreg, vreg); | |
809 | /* | |
810 | if (notp) | |
811 | notpart(vreg); | |
812 | */ | |
813 | } | |
814 | ||
815 | /* | |
816 | * Kill buffer code. If delete operator is c or d, then save | |
817 | * the region in numbered buffers. | |
818 | * | |
819 | * BUG: This may be somewhat inefficient due | |
820 | * to the way named buffer are implemented, | |
821 | * necessitating some optimization. | |
822 | */ | |
823 | vreg = 0; | |
824 | if (any(op, "cd")) { | |
825 | vremote(cnt, YANKreg, '1'); | |
826 | /* | |
827 | if (notp) | |
828 | notpart('1'); | |
829 | */ | |
830 | } | |
831 | return (cnt); | |
832 | } | |
833 | ||
834 | /* | |
835 | * Routine for vremote to call to implement shifts. | |
836 | */ | |
837 | vshift() | |
838 | { | |
839 | ||
840 | shift(op, 1); | |
841 | } | |
842 | ||
843 | /* | |
844 | * Replace a single character with the next input character. | |
845 | * A funny kind of insert. | |
846 | */ | |
847 | vrep(cnt) | |
848 | register int cnt; | |
849 | { | |
850 | register int i, c; | |
851 | ||
852 | if (cnt > strlen(cursor)) { | |
853 | beep(); | |
854 | return; | |
855 | } | |
856 | i = column(cursor + cnt - 1); | |
857 | vcursat(cursor); | |
858 | doomed = i - cindent(); | |
859 | if (!vglobp) { | |
860 | c = getesc(); | |
861 | if (c == 0) { | |
862 | vfixcurs(); | |
863 | return; | |
864 | } | |
865 | ungetkey(c); | |
866 | } | |
867 | CP(vutmp, linebuf); | |
887e3e0d MH |
868 | if (FIXUNDO) |
869 | vundkind = VCHNG; | |
79597adf MH |
870 | wcursor = cursor + cnt; |
871 | vUD1 = cursor; vUD2 = wcursor; | |
872 | CP(cursor, wcursor); | |
873 | prepapp(); | |
874 | vappend('r', cnt, 0); | |
875 | *lastcp++ = INS[0]; | |
876 | setLAST(); | |
877 | } | |
878 | ||
879 | /* | |
880 | * Yank. | |
881 | * | |
882 | * Yanking to string registers occurs for free (essentially) | |
883 | * in the routine xdw(). | |
884 | */ | |
885 | vyankit() | |
886 | { | |
887 | register int cnt; | |
888 | ||
889 | if (wdot) { | |
890 | if ((cnt = xdw()) < 0) | |
891 | return; | |
892 | vremote(cnt, yank, 0); | |
893 | setpk(); | |
894 | notenam = "yank"; | |
887e3e0d MH |
895 | if (FIXUNDO) |
896 | vundkind = VNONE; | |
79597adf MH |
897 | DEL[0] = 0; |
898 | wdot = NOLINE; | |
899 | if (notecnt <= vcnt - vcline && notecnt < value(REPORT)) | |
900 | notecnt = 0; | |
901 | vrepaint(cursor); | |
902 | return; | |
903 | } | |
904 | takeout(DEL); | |
905 | } | |
906 | ||
907 | /* | |
908 | * Set pkill variables so a put can | |
909 | * know how to put back partial text. | |
910 | * This is necessary because undo needs the complete | |
911 | * line images to be saved, while a put wants to trim | |
912 | * the first and last lines. The compromise | |
913 | * is for put to be more clever. | |
914 | */ | |
915 | setpk() | |
916 | { | |
917 | ||
918 | if (wcursor) { | |
919 | pkill[0] = cursor; | |
920 | pkill[1] = wcursor; | |
921 | } | |
922 | } |