Commit | Line | Data |
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7c4625ef | 1 | /* Copyright (c) 1980 Regents of the University of California */ |
f0f2d980 | 2 | static char *sccsid = "@(#)ex_vops.c 6.2 %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); | |
f0f2d980 | 100 | vudump("before big undo"); |
79597adf MH |
101 | savenote = notecnt; |
102 | undo(1); | |
d266c416 | 103 | if (show && (vundkind != VMCHNG || addr != dot)) |
79597adf MH |
104 | killU(); |
105 | vundkind = VMANY; | |
106 | cnt = dot - addr; | |
107 | if (cnt < 0 || cnt > vcnt || state != VISUAL) { | |
d266c416 MH |
108 | if (show) |
109 | vjumpto(dot, NOSTR, '.'); | |
887e3e0d | 110 | break; |
79597adf MH |
111 | } |
112 | if (!savenote) | |
113 | notecnt = 0; | |
d266c416 MH |
114 | if (show) { |
115 | vcline = cnt; | |
116 | vrepaint(vmcurs); | |
117 | } | |
79597adf | 118 | vmcurs = 0; |
887e3e0d | 119 | break; |
79597adf MH |
120 | |
121 | case VCHNG: | |
122 | case VCAPU: | |
123 | vundkind = VCHNG; | |
124 | strcpy(temp, vutmp); | |
125 | strcpy(vutmp, linebuf); | |
126 | doomed = column(vUA2 - 1) - column(vUA1 - 1); | |
127 | strcLIN(temp); | |
128 | cp = vUA1; vUA1 = vUD1; vUD1 = cp; | |
129 | cp = vUA2; vUA2 = vUD2; vUD2 = cp; | |
d266c416 MH |
130 | if (!show) |
131 | break; | |
79597adf MH |
132 | cursor = vUD1; |
133 | if (state == HARDOPEN) { | |
134 | doomed = 0; | |
135 | vsave(); | |
136 | vopen(dot, WBOT); | |
137 | vnline(cursor); | |
887e3e0d | 138 | break; |
79597adf MH |
139 | } |
140 | /* | |
141 | * Pseudo insert command. | |
142 | */ | |
143 | vcursat(cursor); | |
144 | OO = Outchar; Outchar = vinschar; hold |= HOLDQIK; | |
145 | vprepins(); | |
146 | temp[vUA2 - linebuf] = 0; | |
147 | for (cp = &temp[vUA1 - linebuf]; *cp;) | |
148 | putchar(*cp++); | |
149 | Outchar = OO; hold = oldhold; | |
150 | endim(); | |
151 | physdc(cindent(), cindent() + doomed); | |
152 | doomed = 0; | |
153 | vdirty(vcline, 1); | |
154 | vsyncCL(); | |
155 | if (cursor > linebuf && cursor >= strend(linebuf)) | |
156 | cursor--; | |
157 | vfixcurs(); | |
887e3e0d | 158 | break; |
79597adf MH |
159 | |
160 | case VNONE: | |
161 | beep(); | |
887e3e0d | 162 | break; |
79597adf MH |
163 | } |
164 | } | |
165 | ||
d266c416 MH |
166 | /* |
167 | * Routine to handle a change inside a macro. | |
168 | * Fromvis is true if we were called from a visual command (as | |
169 | * opposed to an ex command). This has nothing to do with being | |
170 | * in open/visual mode as :s/foo/bar is not fromvis. | |
171 | */ | |
172 | vmacchng(fromvis) | |
173 | bool fromvis; | |
174 | { | |
175 | line *savedot, *savedol; | |
176 | char *savecursor; | |
04379bab | 177 | char savelb[LBSIZE]; |
d266c416 MH |
178 | int nlines, more; |
179 | register line *a1, *a2; | |
180 | char ch; /* DEBUG */ | |
181 | int copyw(), copywR(); | |
182 | ||
183 | if (!inopen) | |
184 | return; | |
185 | if (!vmacp) | |
186 | vch_mac = VC_NOTINMAC; | |
187 | #ifdef TRACE | |
188 | if (trace) | |
189 | fprintf(trace, "vmacchng, vch_mac=%d, linebuf='%s', *dot=%o\n", vch_mac, linebuf, *dot); | |
190 | #endif | |
191 | if (vmacp && fromvis) | |
192 | vsave(); | |
193 | #ifdef TRACE | |
194 | if (trace) | |
195 | fprintf(trace, "after vsave, linebuf='%s', *dot=%o\n", linebuf, *dot); | |
196 | #endif | |
197 | switch(vch_mac) { | |
198 | case VC_NOCHANGE: | |
199 | vch_mac = VC_ONECHANGE; | |
200 | break; | |
201 | case VC_ONECHANGE: | |
202 | /* Save current state somewhere */ | |
203 | #ifdef TRACE | |
204 | vudump("before vmacchng hairy case"); | |
205 | #endif | |
206 | savedot = dot; savedol = dol; savecursor = cursor; | |
04379bab | 207 | CP(savelb, linebuf); |
d266c416 MH |
208 | nlines = dol - zero; |
209 | while ((line *) endcore - truedol < nlines) | |
210 | morelines(); | |
211 | copyw(truedol+1, zero+1, nlines); | |
212 | truedol += nlines; | |
213 | ||
214 | #ifdef TRACE | |
215 | visdump("before vundo"); | |
216 | #endif | |
217 | /* Restore state as it was at beginning of macro */ | |
218 | vundo(0); | |
219 | #ifdef TRACE | |
220 | visdump("after vundo"); | |
221 | vudump("after vundo"); | |
222 | #endif | |
223 | ||
224 | /* Do the saveall we should have done then */ | |
225 | saveall(); | |
226 | #ifdef TRACE | |
227 | vudump("after saveall"); | |
228 | #endif | |
229 | ||
230 | /* Restore current state from where saved */ | |
231 | more = savedol - dol; /* amount we shift everything by */ | |
232 | if (more) | |
233 | (*(more>0 ? copywR : copyw))(savedol+1, dol+1, truedol-dol); | |
04379bab | 234 | unddol += more; truedol += more; undap2 += more; |
d266c416 MH |
235 | |
236 | truedol -= nlines; | |
237 | copyw(zero+1, truedol+1, nlines); | |
238 | dot = savedot; dol = savedol ; cursor = savecursor; | |
04379bab | 239 | CP(linebuf, savelb); |
d266c416 MH |
240 | vch_mac = VC_MANYCHANGE; |
241 | ||
242 | /* Arrange that no further undo saving happens within macro */ | |
243 | otchng = tchng; /* Copied this line blindly - bug? */ | |
244 | inopen = -1; /* no need to save since it had to be 1 or -1 before */ | |
245 | vundkind = VMANY; | |
246 | #ifdef TRACE | |
247 | vudump("after vmacchng"); | |
248 | #endif | |
249 | break; | |
250 | case VC_NOTINMAC: | |
251 | case VC_MANYCHANGE: | |
252 | /* Nothing to do for various reasons. */ | |
253 | break; | |
254 | } | |
255 | } | |
256 | ||
79597adf MH |
257 | /* |
258 | * Initialize undo information before an append. | |
259 | */ | |
260 | vnoapp() | |
261 | { | |
262 | ||
263 | vUD1 = vUD2 = cursor; | |
264 | } | |
265 | ||
266 | /* | |
267 | * All the rest of the motion sequences have one or more | |
268 | * cases to deal with. In the case wdot == 0, operation | |
269 | * is totally within current line, from cursor to wcursor. | |
270 | * If wdot is given, but wcursor is 0, then operation affects | |
271 | * the inclusive line range. The hardest case is when both wdot | |
272 | * and wcursor are given, then operation affects from line dot at | |
273 | * cursor to line wdot at wcursor. | |
274 | */ | |
275 | ||
276 | /* | |
277 | * Move is simple, except for moving onto new lines in hardcopy open mode. | |
278 | */ | |
279 | vmove() | |
280 | { | |
281 | register int cnt; | |
282 | ||
283 | if (wdot) { | |
284 | if (wdot < one || wdot > dol) { | |
285 | beep(); | |
286 | return; | |
287 | } | |
288 | cnt = wdot - dot; | |
289 | wdot = NOLINE; | |
290 | if (cnt) | |
291 | killU(); | |
292 | vupdown(cnt, wcursor); | |
293 | return; | |
294 | } | |
295 | ||
296 | /* | |
297 | * When we move onto a new line, save information for U undo. | |
298 | */ | |
299 | if (vUNDdot != dot) { | |
300 | vUNDsav = *dot; | |
301 | vUNDcurs = wcursor; | |
302 | vUNDdot = dot; | |
303 | } | |
304 | ||
305 | /* | |
306 | * In hardcopy open, type characters to left of cursor | |
307 | * on new line, or back cursor up if its to left of where we are. | |
308 | * In any case if the current line is ``rubbled'' i.e. has trashy | |
309 | * looking overstrikes on it or \'s from deletes, we reprint | |
310 | * so it is more comprehensible (and also because we can't work | |
311 | * if we let it get more out of sync since column() won't work right. | |
312 | */ | |
313 | if (state == HARDOPEN) { | |
314 | register char *cp; | |
315 | if (rubble) { | |
316 | register int c; | |
317 | int oldhold = hold; | |
318 | ||
319 | sethard(); | |
320 | cp = wcursor; | |
321 | c = *cp; | |
322 | *cp = 0; | |
323 | hold |= HOLDDOL; | |
324 | vreopen(WTOP, lineDOT(), vcline); | |
325 | hold = oldhold; | |
326 | *cp = c; | |
327 | } else if (wcursor > cursor) { | |
328 | vfixcurs(); | |
329 | for (cp = cursor; *cp && cp < wcursor;) { | |
330 | register int c = *cp++ & TRIM; | |
331 | ||
332 | putchar(c ? c : ' '); | |
333 | } | |
334 | } | |
335 | } | |
336 | vsetcurs(wcursor); | |
337 | } | |
338 | ||
339 | /* | |
340 | * Delete operator. | |
341 | * | |
342 | * Hard case of deleting a range where both wcursor and wdot | |
343 | * are specified is treated as a special case of change and handled | |
344 | * by vchange (although vchange may pass it back if it degenerates | |
345 | * to a full line range delete.) | |
346 | */ | |
347 | vdelete(c) | |
348 | char c; | |
349 | { | |
350 | register char *cp; | |
351 | register int i; | |
352 | ||
353 | if (wdot) { | |
354 | if (wcursor) { | |
355 | vchange('d'); | |
356 | return; | |
357 | } | |
358 | if ((i = xdw()) < 0) | |
359 | return; | |
360 | if (state != VISUAL) { | |
361 | vgoto(LINE(0), 0); | |
362 | vputchar('@'); | |
363 | } | |
364 | wdot = dot; | |
365 | vremote(i, delete, 0); | |
366 | notenam = "delete"; | |
367 | DEL[0] = 0; | |
368 | killU(); | |
369 | vreplace(vcline, i, 0); | |
370 | if (wdot > dol) | |
371 | vcline--; | |
372 | vrepaint(NOSTR); | |
373 | return; | |
374 | } | |
375 | if (wcursor < linebuf) | |
376 | wcursor = linebuf; | |
377 | if (cursor == wcursor) { | |
378 | beep(); | |
379 | return; | |
380 | } | |
381 | i = vdcMID(); | |
382 | cp = cursor; | |
383 | setDEL(); | |
384 | CP(cp, wcursor); | |
385 | if (cp > linebuf && (cp[0] == 0 || c == '#')) | |
386 | cp--; | |
387 | if (state == HARDOPEN) { | |
388 | bleep(i, cp); | |
389 | cursor = cp; | |
390 | return; | |
391 | } | |
392 | physdc(column(cursor - 1), i); | |
393 | DEPTH(vcline) = 0; | |
394 | vreopen(LINE(vcline), lineDOT(), vcline); | |
395 | vsyncCL(); | |
396 | vsetcurs(cp); | |
397 | } | |
398 | ||
399 | /* | |
400 | * Change operator. | |
401 | * | |
402 | * In a single line we mark the end of the changed area with '$'. | |
403 | * On multiple whole lines, we clear the lines first. | |
404 | * Across lines with both wcursor and wdot given, we delete | |
405 | * and sync then append (but one operation for undo). | |
406 | */ | |
407 | vchange(c) | |
408 | char c; | |
409 | { | |
410 | register char *cp; | |
411 | register int i, ind, cnt; | |
412 | line *addr; | |
413 | ||
414 | if (wdot) { | |
415 | /* | |
416 | * Change/delete of lines or across line boundaries. | |
417 | */ | |
418 | if ((cnt = xdw()) < 0) | |
419 | return; | |
420 | getDOT(); | |
421 | if (wcursor && cnt == 1) { | |
422 | /* | |
423 | * Not really. | |
424 | */ | |
425 | wdot = 0; | |
426 | if (c == 'd') { | |
427 | vdelete(c); | |
428 | return; | |
429 | } | |
430 | goto smallchange; | |
431 | } | |
432 | if (cursor && wcursor) { | |
433 | /* | |
434 | * Across line boundaries, but not | |
435 | * necessarily whole lines. | |
436 | * Construct what will be left. | |
437 | */ | |
438 | *cursor = 0; | |
439 | strcpy(genbuf, linebuf); | |
440 | getline(*wdot); | |
441 | if (strlen(genbuf) + strlen(wcursor) > LBSIZE - 2) { | |
442 | getDOT(); | |
443 | beep(); | |
444 | return; | |
445 | } | |
446 | strcat(genbuf, wcursor); | |
447 | if (c == 'd' && *vpastwh(genbuf) == 0) { | |
448 | /* | |
449 | * Although this is a delete | |
450 | * spanning line boundaries, what | |
451 | * would be left is all white space, | |
452 | * so take it all away. | |
453 | */ | |
454 | wcursor = 0; | |
455 | getDOT(); | |
456 | op = 0; | |
457 | notpart(lastreg); | |
458 | notpart('1'); | |
459 | vdelete(c); | |
460 | return; | |
461 | } | |
462 | ind = -1; | |
463 | } else if (c == 'd' && wcursor == 0) { | |
464 | vdelete(c); | |
465 | return; | |
466 | } else | |
467 | #ifdef LISPCODE | |
468 | /* | |
469 | * We are just substituting text for whole lines, | |
470 | * so determine the first autoindent. | |
471 | */ | |
472 | if (value(LISP) && value(AUTOINDENT)) | |
473 | ind = lindent(dot); | |
474 | else | |
475 | #endif | |
476 | ind = whitecnt(linebuf); | |
477 | i = vcline >= 0 ? LINE(vcline) : WTOP; | |
478 | ||
479 | /* | |
480 | * Delete the lines from the buffer, | |
481 | * and remember how the partial stuff came about in | |
482 | * case we are told to put. | |
483 | */ | |
484 | addr = dot; | |
485 | vremote(cnt, delete, 0); | |
486 | setpk(); | |
487 | notenam = "delete"; | |
488 | if (c != 'd') | |
489 | notenam = "change"; | |
490 | /* | |
491 | * If DEL[0] were nonzero, put would put it back | |
492 | * rather than the deleted lines. | |
493 | */ | |
494 | DEL[0] = 0; | |
495 | if (cnt > 1) | |
496 | killU(); | |
497 | ||
498 | /* | |
499 | * Now hack the screen image coordination. | |
500 | */ | |
501 | vreplace(vcline, cnt, 0); | |
502 | wdot = NOLINE; | |
503 | noteit(0); | |
504 | vcline--; | |
505 | if (addr <= dol) | |
506 | dot--; | |
507 | ||
508 | /* | |
509 | * If this is a across line delete/change, | |
510 | * cursor stays where it is; just splice together the pieces | |
511 | * of the new line. Otherwise generate a autoindent | |
512 | * after a S command. | |
513 | */ | |
514 | if (ind >= 0) { | |
515 | *genindent(ind) = 0; | |
516 | vdoappend(genbuf); | |
517 | } else { | |
518 | vmcurs = cursor; | |
519 | strcLIN(genbuf); | |
520 | vdoappend(linebuf); | |
521 | } | |
522 | ||
523 | /* | |
524 | * Indicate a change on hardcopies by | |
525 | * erasing the current line. | |
526 | */ | |
527 | if (c != 'd' && state != VISUAL && state != HARDOPEN) { | |
528 | int oldhold = hold; | |
529 | ||
530 | hold |= HOLDAT, vclrlin(i, dot), hold = oldhold; | |
531 | } | |
532 | ||
533 | /* | |
534 | * Open the line (logically) on the screen, and | |
535 | * update the screen tail. Unless we are really a delete | |
536 | * go off and gather up inserted characters. | |
537 | */ | |
538 | vcline++; | |
539 | if (vcline < 0) | |
540 | vcline = 0; | |
541 | vopen(dot, i); | |
542 | vsyncCL(); | |
543 | noteit(1); | |
544 | if (c != 'd') { | |
545 | if (ind >= 0) { | |
546 | cursor = linebuf; | |
547 | linebuf[0] = 0; | |
548 | vfixcurs(); | |
549 | } else { | |
550 | ind = 0; | |
551 | vcursat(cursor); | |
552 | } | |
553 | vappend('x', 1, ind); | |
554 | return; | |
555 | } | |
556 | if (*cursor == 0 && cursor > linebuf) | |
557 | cursor--; | |
558 | vrepaint(cursor); | |
559 | return; | |
560 | } | |
561 | ||
562 | smallchange: | |
563 | /* | |
564 | * The rest of this is just low level hacking on changes | |
565 | * of small numbers of characters. | |
566 | */ | |
567 | if (wcursor < linebuf) | |
568 | wcursor = linebuf; | |
569 | if (cursor == wcursor) { | |
570 | beep(); | |
571 | return; | |
572 | } | |
573 | i = vdcMID(); | |
574 | cp = cursor; | |
575 | if (state != HARDOPEN) | |
576 | vfixcurs(); | |
577 | ||
578 | /* | |
579 | * Put out the \\'s indicating changed text in hardcopy, | |
580 | * or mark the end of the change with $ if not hardcopy. | |
581 | */ | |
582 | if (state == HARDOPEN) | |
583 | bleep(i, cp); | |
584 | else { | |
585 | vcursbef(wcursor); | |
586 | putchar('$'); | |
587 | i = cindent(); | |
588 | } | |
589 | ||
590 | /* | |
591 | * Remember the deleted text for possible put, | |
592 | * and then prepare and execute the input portion of the change. | |
593 | */ | |
594 | cursor = cp; | |
595 | setDEL(); | |
596 | CP(cursor, wcursor); | |
597 | if (state != HARDOPEN) { | |
598 | vcursaft(cursor - 1); | |
599 | doomed = i - cindent(); | |
600 | } else { | |
601 | /* | |
602 | sethard(); | |
603 | wcursor = cursor; | |
604 | cursor = linebuf; | |
605 | vgoto(outline, value(NUMBER) << 3); | |
606 | vmove(); | |
607 | */ | |
608 | doomed = 0; | |
609 | } | |
610 | prepapp(); | |
611 | vappend('c', 1, 0); | |
612 | } | |
613 | ||
614 | /* | |
615 | * Open new lines. | |
616 | * | |
617 | * Tricky thing here is slowopen. This causes display updating | |
618 | * to be held off so that 300 baud dumb terminals don't lose badly. | |
619 | * This also suppressed counts, which otherwise say how many blank | |
620 | * space to open up. Counts are also suppressed on intelligent terminals. | |
621 | * Actually counts are obsoleted, since if your terminal is slow | |
622 | * you are better off with slowopen. | |
623 | */ | |
624 | voOpen(c, cnt) | |
625 | char c; | |
626 | register int cnt; | |
627 | { | |
628 | register int ind = 0, i; | |
629 | short oldhold = hold; | |
630 | ||
631 | if (value(SLOWOPEN) || value(REDRAW) && AL && DL) | |
632 | cnt = 1; | |
633 | vsave(); | |
634 | setLAST(); | |
635 | if (value(AUTOINDENT)) | |
636 | ind = whitecnt(linebuf); | |
637 | if (c == 'O') { | |
638 | vcline--; | |
639 | dot--; | |
640 | if (dot > zero) | |
641 | getDOT(); | |
642 | } | |
643 | if (value(AUTOINDENT)) { | |
644 | #ifdef LISPCODE | |
645 | if (value(LISP)) | |
646 | ind = lindent(dot + 1); | |
647 | #endif | |
648 | } | |
649 | killU(); | |
650 | prepapp(); | |
887e3e0d MH |
651 | if (FIXUNDO) |
652 | vundkind = VMANY; | |
79597adf MH |
653 | if (state != VISUAL) |
654 | c = WBOT + 1; | |
655 | else { | |
656 | c = vcline < 0 ? WTOP - cnt : LINE(vcline) + DEPTH(vcline); | |
657 | if (c < ZERO) | |
658 | c = ZERO; | |
659 | i = LINE(vcline + 1) - c; | |
660 | if (i < cnt && c <= WBOT && (!AL || !DL)) | |
661 | vinslin(c, cnt - i, vcline); | |
662 | } | |
663 | *genindent(ind) = 0; | |
664 | vdoappend(genbuf); | |
665 | vcline++; | |
666 | oldhold = hold; | |
667 | hold |= HOLDROL; | |
668 | vopen(dot, c); | |
669 | hold = oldhold; | |
670 | if (value(SLOWOPEN)) | |
671 | /* | |
672 | * Oh, so lazy! | |
673 | */ | |
674 | vscrap(); | |
675 | else | |
676 | vsync1(LINE(vcline)); | |
677 | cursor = linebuf; | |
678 | linebuf[0] = 0; | |
679 | vappend('o', 1, ind); | |
680 | } | |
681 | ||
682 | /* | |
683 | * > < and = shift operators. | |
684 | * | |
685 | * Note that =, which aligns lisp, is just a ragged sort of shift, | |
686 | * since it never distributes text between lines. | |
687 | */ | |
688 | char vshnam[2] = { 'x', 0 }; | |
689 | ||
690 | vshftop() | |
691 | { | |
692 | register line *addr; | |
693 | register int cnt; | |
694 | ||
695 | if ((cnt = xdw()) < 0) | |
696 | return; | |
697 | addr = dot; | |
698 | vremote(cnt, vshift, 0); | |
699 | vshnam[0] = op; | |
700 | notenam = vshnam; | |
701 | dot = addr; | |
702 | vreplace(vcline, cnt, cnt); | |
703 | if (state == HARDOPEN) | |
704 | vcnt = 0; | |
705 | vrepaint(NOSTR); | |
706 | } | |
707 | ||
708 | /* | |
709 | * !. | |
710 | * | |
711 | * Filter portions of the buffer through unix commands. | |
712 | */ | |
713 | vfilter() | |
714 | { | |
715 | register line *addr; | |
716 | register int cnt; | |
717 | char *oglobp, d; | |
718 | ||
719 | if ((cnt = xdw()) < 0) | |
720 | return; | |
721 | if (vglobp) | |
722 | vglobp = uxb; | |
723 | if (readecho('!')) | |
724 | return; | |
725 | oglobp = globp; globp = genbuf + 1; | |
726 | d = peekc; ungetchar(0); | |
727 | CATCH | |
728 | fixech(); | |
729 | unix0(0); | |
730 | ONERR | |
731 | splitw = 0; | |
732 | ungetchar(d); | |
733 | vrepaint(cursor); | |
734 | globp = oglobp; | |
735 | return; | |
736 | ENDCATCH | |
737 | ungetchar(d); globp = oglobp; | |
738 | addr = dot; | |
739 | CATCH | |
740 | vgoto(WECHO, 0); flusho(); | |
741 | vremote(cnt, filter, 2); | |
742 | ONERR | |
743 | vdirty(0, LINES); | |
744 | ENDCATCH | |
745 | if (dot == zero && dol > zero) | |
746 | dot = one; | |
747 | splitw = 0; | |
748 | notenam = ""; | |
887e3e0d MH |
749 | /* |
750 | * BUG: we shouldn't be depending on what undap2 and undap1 are, | |
751 | * since we may be inside a macro. What's really wanted is the | |
752 | * number of lines we read from the filter. However, the mistake | |
753 | * will be an overestimate so it only results in extra work, | |
754 | * it shouldn't cause any real screwups. | |
755 | */ | |
79597adf MH |
756 | vreplace(vcline, cnt, undap2 - undap1); |
757 | dot = addr; | |
758 | if (dot > dol) { | |
759 | dot--; | |
760 | vcline--; | |
761 | } | |
762 | vrepaint(NOSTR); | |
763 | } | |
764 | ||
765 | /* | |
766 | * Xdw exchanges dot and wdot if appropriate and also checks | |
767 | * that wdot is reasonable. Its name comes from | |
768 | * xchange dotand wdot | |
769 | */ | |
770 | xdw() | |
771 | { | |
772 | register char *cp; | |
773 | register int cnt; | |
774 | /* | |
775 | register int notp = 0; | |
776 | */ | |
777 | ||
778 | if (wdot == NOLINE || wdot < one || wdot > dol) { | |
779 | beep(); | |
780 | return (-1); | |
781 | } | |
782 | vsave(); | |
783 | setLAST(); | |
784 | if (dot > wdot) { | |
785 | register line *addr; | |
786 | ||
787 | vcline -= dot - wdot; | |
788 | addr = dot; dot = wdot; wdot = addr; | |
789 | cp = cursor; cursor = wcursor; wcursor = cp; | |
790 | } | |
791 | /* | |
792 | * If a region is specified but wcursor is at the begining | |
793 | * of the last line, then we move it to be the end of the | |
794 | * previous line (actually off the end). | |
795 | */ | |
796 | if (cursor && wcursor == linebuf && wdot > dot) { | |
797 | wdot--; | |
798 | getDOT(); | |
799 | if (vpastwh(linebuf) >= cursor) | |
800 | wcursor = 0; | |
801 | else { | |
802 | getline(*wdot); | |
803 | wcursor = strend(linebuf); | |
804 | getDOT(); | |
805 | } | |
806 | /* | |
807 | * Should prepare in caller for possible dot == wdot. | |
808 | */ | |
809 | } | |
810 | cnt = wdot - dot + 1; | |
811 | if (vreg) { | |
812 | vremote(cnt, YANKreg, vreg); | |
813 | /* | |
814 | if (notp) | |
815 | notpart(vreg); | |
816 | */ | |
817 | } | |
818 | ||
819 | /* | |
820 | * Kill buffer code. If delete operator is c or d, then save | |
821 | * the region in numbered buffers. | |
822 | * | |
823 | * BUG: This may be somewhat inefficient due | |
824 | * to the way named buffer are implemented, | |
825 | * necessitating some optimization. | |
826 | */ | |
827 | vreg = 0; | |
828 | if (any(op, "cd")) { | |
829 | vremote(cnt, YANKreg, '1'); | |
830 | /* | |
831 | if (notp) | |
832 | notpart('1'); | |
833 | */ | |
834 | } | |
835 | return (cnt); | |
836 | } | |
837 | ||
838 | /* | |
839 | * Routine for vremote to call to implement shifts. | |
840 | */ | |
841 | vshift() | |
842 | { | |
843 | ||
844 | shift(op, 1); | |
845 | } | |
846 | ||
847 | /* | |
848 | * Replace a single character with the next input character. | |
849 | * A funny kind of insert. | |
850 | */ | |
851 | vrep(cnt) | |
852 | register int cnt; | |
853 | { | |
854 | register int i, c; | |
855 | ||
856 | if (cnt > strlen(cursor)) { | |
857 | beep(); | |
858 | return; | |
859 | } | |
860 | i = column(cursor + cnt - 1); | |
861 | vcursat(cursor); | |
862 | doomed = i - cindent(); | |
863 | if (!vglobp) { | |
864 | c = getesc(); | |
865 | if (c == 0) { | |
866 | vfixcurs(); | |
867 | return; | |
868 | } | |
869 | ungetkey(c); | |
870 | } | |
871 | CP(vutmp, linebuf); | |
887e3e0d MH |
872 | if (FIXUNDO) |
873 | vundkind = VCHNG; | |
79597adf MH |
874 | wcursor = cursor + cnt; |
875 | vUD1 = cursor; vUD2 = wcursor; | |
876 | CP(cursor, wcursor); | |
877 | prepapp(); | |
878 | vappend('r', cnt, 0); | |
879 | *lastcp++ = INS[0]; | |
880 | setLAST(); | |
881 | } | |
882 | ||
883 | /* | |
884 | * Yank. | |
885 | * | |
886 | * Yanking to string registers occurs for free (essentially) | |
887 | * in the routine xdw(). | |
888 | */ | |
889 | vyankit() | |
890 | { | |
891 | register int cnt; | |
892 | ||
893 | if (wdot) { | |
894 | if ((cnt = xdw()) < 0) | |
895 | return; | |
896 | vremote(cnt, yank, 0); | |
897 | setpk(); | |
898 | notenam = "yank"; | |
887e3e0d MH |
899 | if (FIXUNDO) |
900 | vundkind = VNONE; | |
79597adf MH |
901 | DEL[0] = 0; |
902 | wdot = NOLINE; | |
903 | if (notecnt <= vcnt - vcline && notecnt < value(REPORT)) | |
904 | notecnt = 0; | |
905 | vrepaint(cursor); | |
906 | return; | |
907 | } | |
908 | takeout(DEL); | |
909 | } | |
910 | ||
911 | /* | |
912 | * Set pkill variables so a put can | |
913 | * know how to put back partial text. | |
914 | * This is necessary because undo needs the complete | |
915 | * line images to be saved, while a put wants to trim | |
916 | * the first and last lines. The compromise | |
917 | * is for put to be more clever. | |
918 | */ | |
919 | setpk() | |
920 | { | |
921 | ||
922 | if (wcursor) { | |
923 | pkill[0] = cursor; | |
924 | pkill[1] = wcursor; | |
925 | } | |
926 | } |