| 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 | } |