1 /*- 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1992, 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #ifndef lint 13 static const char sccsid[] = "@(#)v_ex.c 10.42 (Berkeley) 6/28/96"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/time.h> 19 20 #include <bitstring.h> 21 #include <limits.h> 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <unistd.h> 26 27 #include "../common/common.h" 28 #include "vi.h" 29 30 static int v_ecl __P((SCR *)); 31 static int v_ecl_init __P((SCR *)); 32 static int v_ecl_log __P((SCR *, TEXT *)); 33 static int v_ex_done __P((SCR *, VICMD *)); 34 static int v_exec_ex __P((SCR *, VICMD *, EXCMD *)); 35 36 /* 37 * v_again -- & 38 * Repeat the previous substitution. 39 * 40 * PUBLIC: int v_again __P((SCR *, VICMD *)); 41 */ 42 int 43 v_again(sp, vp) 44 SCR *sp; 45 VICMD *vp; 46 { 47 ARGS *ap[2], a; 48 EXCMD cmd; 49 50 ex_cinit(&cmd, C_SUBAGAIN, 2, vp->m_start.lno, vp->m_start.lno, 1, ap); 51 ex_cadd(&cmd, &a, "", 1); 52 53 return (v_exec_ex(sp, vp, &cmd)); 54 } 55 56 /* 57 * v_exmode -- Q 58 * Switch the editor into EX mode. 59 * 60 * PUBLIC: int v_exmode __P((SCR *, VICMD *)); 61 */ 62 int 63 v_exmode(sp, vp) 64 SCR *sp; 65 VICMD *vp; 66 { 67 GS *gp; 68 69 gp = sp->gp; 70 71 /* Try and switch screens -- the screen may not permit it. */ 72 if (gp->scr_screen(sp, SC_EX)) { 73 msgq(sp, M_ERR, 74 "207|The Q command requires the ex terminal interface"); 75 return (1); 76 } 77 (void)gp->scr_attr(sp, SA_ALTERNATE, 0); 78 79 /* Save the current cursor position. */ 80 sp->frp->lno = sp->lno; 81 sp->frp->cno = sp->cno; 82 F_SET(sp->frp, FR_CURSORSET); 83 84 /* Switch to ex mode. */ 85 F_CLR(sp, SC_VI | SC_SCR_VI); 86 F_SET(sp, SC_EX); 87 88 /* Move out of the vi screen. */ 89 (void)ex_puts(sp, "\n"); 90 91 return (0); 92 } 93 94 /* 95 * v_join -- [count]J 96 * Join lines together. 97 * 98 * PUBLIC: int v_join __P((SCR *, VICMD *)); 99 */ 100 int 101 v_join(sp, vp) 102 SCR *sp; 103 VICMD *vp; 104 { 105 EXCMD cmd; 106 int lno; 107 108 /* 109 * YASC. 110 * The general rule is that '#J' joins # lines, counting the current 111 * line. However, 'J' and '1J' are the same as '2J', i.e. join the 112 * current and next lines. This doesn't map well into the ex command 113 * (which takes two line numbers), so we handle it here. Note that 114 * we never test for EOF -- historically going past the end of file 115 * worked just fine. 116 */ 117 lno = vp->m_start.lno + 1; 118 if (F_ISSET(vp, VC_C1SET) && vp->count > 2) 119 lno = vp->m_start.lno + (vp->count - 1); 120 121 ex_cinit(&cmd, C_JOIN, 2, vp->m_start.lno, lno, 0, NULL); 122 return (v_exec_ex(sp, vp, &cmd)); 123 } 124 125 /* 126 * v_shiftl -- [count]<motion 127 * Shift lines left. 128 * 129 * PUBLIC: int v_shiftl __P((SCR *, VICMD *)); 130 */ 131 int 132 v_shiftl(sp, vp) 133 SCR *sp; 134 VICMD *vp; 135 { 136 ARGS *ap[2], a; 137 EXCMD cmd; 138 139 ex_cinit(&cmd, C_SHIFTL, 2, vp->m_start.lno, vp->m_stop.lno, 0, ap); 140 ex_cadd(&cmd, &a, "<", 1); 141 return (v_exec_ex(sp, vp, &cmd)); 142 } 143 144 /* 145 * v_shiftr -- [count]>motion 146 * Shift lines right. 147 * 148 * PUBLIC: int v_shiftr __P((SCR *, VICMD *)); 149 */ 150 int 151 v_shiftr(sp, vp) 152 SCR *sp; 153 VICMD *vp; 154 { 155 ARGS *ap[2], a; 156 EXCMD cmd; 157 158 ex_cinit(&cmd, C_SHIFTR, 2, vp->m_start.lno, vp->m_stop.lno, 0, ap); 159 ex_cadd(&cmd, &a, ">", 1); 160 return (v_exec_ex(sp, vp, &cmd)); 161 } 162 163 /* 164 * v_suspend -- ^Z 165 * Suspend vi. 166 * 167 * PUBLIC: int v_suspend __P((SCR *, VICMD *)); 168 */ 169 int 170 v_suspend(sp, vp) 171 SCR *sp; 172 VICMD *vp; 173 { 174 ARGS *ap[2], a; 175 EXCMD cmd; 176 177 ex_cinit(&cmd, C_STOP, 0, OOBLNO, OOBLNO, 0, ap); 178 ex_cadd(&cmd, &a, "suspend", sizeof("suspend") - 1); 179 return (v_exec_ex(sp, vp, &cmd)); 180 } 181 182 /* 183 * v_switch -- ^^ 184 * Switch to the previous file. 185 * 186 * PUBLIC: int v_switch __P((SCR *, VICMD *)); 187 */ 188 int 189 v_switch(sp, vp) 190 SCR *sp; 191 VICMD *vp; 192 { 193 ARGS *ap[2], a; 194 EXCMD cmd; 195 char *name; 196 197 /* 198 * Try the alternate file name, then the previous file 199 * name. Use the real name, not the user's current name. 200 */ 201 if ((name = sp->alt_name) == NULL) { 202 msgq(sp, M_ERR, "180|No previous file to edit"); 203 return (1); 204 } 205 206 /* If autowrite is set, write out the file. */ 207 if (file_m1(sp, 0, FS_ALL)) 208 return (1); 209 210 ex_cinit(&cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0, ap); 211 ex_cadd(&cmd, &a, name, strlen(name)); 212 return (v_exec_ex(sp, vp, &cmd)); 213 } 214 215 /* 216 * v_tagpush -- ^[ 217 * Do a tag search on the cursor keyword. 218 * 219 * PUBLIC: int v_tagpush __P((SCR *, VICMD *)); 220 */ 221 int 222 v_tagpush(sp, vp) 223 SCR *sp; 224 VICMD *vp; 225 { 226 ARGS *ap[2], a; 227 EXCMD cmd; 228 229 #ifdef GTAGS 230 if (O_ISSET(sp, O_GTAGSMODE) && vp->m_start.cno == 0) 231 ex_cinit(&cmd, C_RTAG, 0, OOBLNO, 0, 0, ap); 232 else 233 #endif 234 ex_cinit(&cmd, C_TAG, 0, OOBLNO, 0, 0, ap); 235 ex_cadd(&cmd, &a, VIP(sp)->keyw, strlen(VIP(sp)->keyw)); 236 return (v_exec_ex(sp, vp, &cmd)); 237 } 238 239 /* 240 * v_tagpop -- ^T 241 * Pop the tags stack. 242 * 243 * PUBLIC: int v_tagpop __P((SCR *, VICMD *)); 244 */ 245 int 246 v_tagpop(sp, vp) 247 SCR *sp; 248 VICMD *vp; 249 { 250 EXCMD cmd; 251 252 ex_cinit(&cmd, C_TAGPOP, 0, OOBLNO, 0, 0, NULL); 253 return (v_exec_ex(sp, vp, &cmd)); 254 } 255 256 /* 257 * v_filter -- [count]!motion command(s) 258 * Run range through shell commands, replacing text. 259 * 260 * PUBLIC: int v_filter __P((SCR *, VICMD *)); 261 */ 262 int 263 v_filter(sp, vp) 264 SCR *sp; 265 VICMD *vp; 266 { 267 EXCMD cmd; 268 TEXT *tp; 269 270 /* 271 * !!! 272 * Historical vi permitted "!!" in an empty file, and it's handled 273 * as a special case in the ex_bang routine. Don't modify this setup 274 * without understanding that one. In particular, note that we're 275 * manipulating the ex argument structures behind ex's back. 276 * 277 * !!! 278 * Historical vi did not permit the '!' command to be associated with 279 * a non-line oriented motion command, in general, although it did 280 * with search commands. So, !f; and !w would fail, but !/;<CR> 281 * would succeed, even if they all moved to the same location in the 282 * current line. I don't see any reason to disallow '!' using any of 283 * the possible motion commands. 284 * 285 * !!! 286 * Historical vi ran the last bang command if N or n was used as the 287 * search motion. 288 */ 289 if (F_ISSET(vp, VC_ISDOT) || 290 ISCMD(vp->rkp, 'N') || ISCMD(vp->rkp, 'n')) { 291 ex_cinit(&cmd, C_BANG, 292 2, vp->m_start.lno, vp->m_stop.lno, 0, NULL); 293 EXP(sp)->argsoff = 0; /* XXX */ 294 295 if (argv_exp1(sp, &cmd, "!", 1, 1)) 296 return (1); 297 cmd.argc = EXP(sp)->argsoff; /* XXX */ 298 cmd.argv = EXP(sp)->args; /* XXX */ 299 return (v_exec_ex(sp, vp, &cmd)); 300 } 301 302 /* Get the command from the user. */ 303 if (v_tcmd(sp, vp, 304 '!', TXT_BS | TXT_CR | TXT_ESCAPE | TXT_FILEC | TXT_PROMPT)) 305 return (1); 306 307 /* 308 * Check to see if the user changed their mind. 309 * 310 * !!! 311 * Entering <escape> on an empty line was historically an error, 312 * this implementation doesn't bother. 313 */ 314 tp = sp->tiq.cqh_first; 315 if (tp->term != TERM_OK) { 316 vp->m_final.lno = sp->lno; 317 vp->m_final.cno = sp->cno; 318 return (0); 319 } 320 321 /* Home the cursor. */ 322 vs_home(sp); 323 324 ex_cinit(&cmd, C_BANG, 2, vp->m_start.lno, vp->m_stop.lno, 0, NULL); 325 EXP(sp)->argsoff = 0; /* XXX */ 326 327 if (argv_exp1(sp, &cmd, tp->lb + 1, tp->len - 1, 1)) 328 return (1); 329 cmd.argc = EXP(sp)->argsoff; /* XXX */ 330 cmd.argv = EXP(sp)->args; /* XXX */ 331 return (v_exec_ex(sp, vp, &cmd)); 332 } 333 334 /* 335 * v_event_exec -- 336 * Execute some command(s) based on an event. 337 * 338 * PUBLIC: int v_event_exec __P((SCR *, VICMD *)); 339 */ 340 int 341 v_event_exec(sp, vp) 342 SCR *sp; 343 VICMD *vp; 344 { 345 EXCMD cmd; 346 347 switch (vp->ev.e_event) { 348 case E_QUIT: 349 ex_cinit(&cmd, C_QUIT, 0, OOBLNO, OOBLNO, 0, NULL); 350 break; 351 case E_WRITE: 352 ex_cinit(&cmd, C_WRITE, 0, OOBLNO, OOBLNO, 0, NULL); 353 break; 354 default: 355 abort(); 356 } 357 return (v_exec_ex(sp, vp, &cmd)); 358 } 359 360 /* 361 * v_exec_ex -- 362 * Execute an ex command. 363 */ 364 static int 365 v_exec_ex(sp, vp, exp) 366 SCR *sp; 367 VICMD *vp; 368 EXCMD *exp; 369 { 370 int rval; 371 372 rval = exp->cmd->fn(sp, exp); 373 return (v_ex_done(sp, vp) || rval); 374 } 375 376 /* 377 * v_ex -- : 378 * Execute a colon command line. 379 * 380 * PUBLIC: int v_ex __P((SCR *, VICMD *)); 381 */ 382 int 383 v_ex(sp, vp) 384 SCR *sp; 385 VICMD *vp; 386 { 387 GS *gp; 388 TEXT *tp; 389 int do_cedit, do_resolution, ifcontinue; 390 391 gp = sp->gp; 392 393 /* 394 * !!! 395 * If we put out more than a single line of messages, or ex trashes 396 * the screen, the user may continue entering ex commands. We find 397 * this out when we do the screen/message resolution. We can't enter 398 * completely into ex mode however, because the user can elect to 399 * return into vi mode by entering any key, i.e. we have to be in raw 400 * mode. 401 */ 402 for (do_cedit = do_resolution = 0;;) { 403 /* 404 * !!! 405 * There may already be an ex command waiting to run. If 406 * so, we continue with it. 407 */ 408 if (!EXCMD_RUNNING(gp)) { 409 /* Get a command. */ 410 if (v_tcmd(sp, vp, ':', 411 TXT_BS | TXT_CEDIT | TXT_FILEC | TXT_PROMPT)) 412 return (1); 413 tp = sp->tiq.cqh_first; 414 415 /* 416 * If the user entered a single <esc>, they want to 417 * edit their colon command history. If they already 418 * entered some text, move it into the edit history. 419 */ 420 if (tp->term == TERM_CEDIT) { 421 if (tp->len > 1 && v_ecl_log(sp, tp)) 422 return (1); 423 do_cedit = 1; 424 break; 425 } 426 427 /* If the user didn't enter anything, return. */ 428 if (tp->term == TERM_BS) 429 break; 430 431 /* Log the command. */ 432 if (O_STR(sp, O_CEDIT) != NULL && v_ecl_log(sp, tp)) 433 return (1); 434 435 /* Push a command on the command stack. */ 436 if (ex_run_str(sp, NULL, tp->lb, tp->len, 0, 1)) 437 return (1); 438 } 439 440 /* Home the cursor. */ 441 vs_home(sp); 442 443 /* 444 * !!! 445 * If the editor wrote the screen behind curses back, put out 446 * a <newline> so that we don't overwrite the user's command 447 * with its output or the next want-to-continue? message. This 448 * doesn't belong here, but I can't find another place to put 449 * it. See, we resolved the output from the last ex command, 450 * and the user entered another one. This is the only place 451 * where we have control before the ex command writes output. 452 * We could get control in vs_msg(), but we have no way to know 453 * if command didn't put out any output when we try and resolve 454 * this command. This fixes a bug where combinations of ex 455 * commands, e.g. ":set<CR>:!date<CR>:set" didn't look right. 456 */ 457 if (F_ISSET(sp, SC_SCR_EXWROTE)) 458 (void)putchar('\n'); 459 460 /* Call the ex parser. */ 461 (void)ex_cmd(sp); 462 463 /* Flush ex messages. */ 464 (void)ex_fflush(sp); 465 466 /* Resolve any messages. */ 467 if (vs_ex_resolve(sp, &ifcontinue)) 468 return (1); 469 470 /* 471 * Continue or return. If continuing, make sure that we 472 * eventually do resolution. 473 */ 474 if (!ifcontinue) 475 break; 476 do_resolution = 1; 477 478 /* If we're continuing, it's a new command. */ 479 ++sp->ccnt; 480 } 481 482 /* 483 * If the user previously continued an ex command, we have to do 484 * resolution to clean up the screen. Don't wait, we already did 485 * that. 486 */ 487 if (do_resolution) { 488 F_SET(sp, SC_EX_WAIT_NO); 489 if (vs_ex_resolve(sp, &ifcontinue)) 490 return (1); 491 } 492 493 /* Cleanup from the ex command. */ 494 if (v_ex_done(sp, vp)) 495 return (1); 496 497 /* The user may want to edit their colon command history. */ 498 if (do_cedit) 499 return (v_ecl(sp)); 500 501 return (0); 502 } 503 504 /* 505 * v_ex_done -- 506 * Cleanup from an ex command. 507 */ 508 static int 509 v_ex_done(sp, vp) 510 SCR *sp; 511 VICMD *vp; 512 { 513 size_t len; 514 515 /* 516 * The only cursor modifications are real, however, the underlying 517 * line may have changed; don't trust anything. This code has been 518 * a remarkably fertile place for bugs. Do a reality check on a 519 * cursor value, and make sure it's okay. If necessary, change it. 520 * Ex keeps track of the line number, but it cares less about the 521 * column and it may have disappeared. 522 * 523 * Don't trust ANYTHING. 524 * 525 * XXX 526 * Ex will soon have to start handling the column correctly; see 527 * the POSIX 1003.2 standard. 528 */ 529 if (db_eget(sp, sp->lno, NULL, &len, NULL)) { 530 sp->lno = 1; 531 sp->cno = 0; 532 } else if (sp->cno >= len) 533 sp->cno = len ? len - 1 : 0; 534 535 vp->m_final.lno = sp->lno; 536 vp->m_final.cno = sp->cno; 537 538 /* 539 * Don't re-adjust the cursor after executing an ex command, 540 * and ex movements are permanent. 541 */ 542 F_CLR(vp, VM_RCM_MASK); 543 F_SET(vp, VM_RCM_SET); 544 545 return (0); 546 } 547 548 /* 549 * v_ecl -- 550 * Start an edit window on the colon command-line commands. 551 */ 552 static int 553 v_ecl(sp) 554 SCR *sp; 555 { 556 GS *gp; 557 SCR *new; 558 559 /* Initialize the screen, if necessary. */ 560 gp = sp->gp; 561 if (gp->ccl_sp == NULL && v_ecl_init(sp)) 562 return (1); 563 564 /* Get a new screen. */ 565 if (screen_init(gp, sp, &new)) 566 return (1); 567 if (vs_split(sp, new, 1)) { 568 (void)screen_end(new); 569 return (1); 570 } 571 572 /* Attach to the screen. */ 573 new->ep = gp->ccl_sp->ep; 574 ++new->ep->refcnt; 575 576 new->frp = gp->ccl_sp->frp; 577 new->frp->flags = sp->frp->flags; 578 579 /* Move the cursor to the end. */ 580 (void)db_last(new, &new->lno); 581 if (new->lno == 0) 582 new->lno = 1; 583 584 /* Remember the originating window. */ 585 sp->ccl_parent = sp; 586 587 /* It's a special window. */ 588 F_SET(new, SC_COMEDIT); 589 590 /* Set up the switch. */ 591 sp->nextdisp = new; 592 F_SET(sp, SC_SSWITCH); 593 return (0); 594 } 595 596 /* 597 * v_ecl_exec -- 598 * Execute a command from a colon command-line window. 599 * 600 * PUBLIC: int v_ecl_exec __P((SCR *)); 601 */ 602 int 603 v_ecl_exec(sp) 604 SCR *sp; 605 { 606 size_t len; 607 char *p; 608 609 if (db_get(sp, sp->lno, 0, &p, &len) && sp->lno == 1) { 610 v_emsg(sp, NULL, VIM_EMPTY); 611 return (1); 612 } 613 if (len == 0) { 614 msgq(sp, M_BERR, "307|No ex command to execute"); 615 return (1); 616 } 617 618 /* Push the command on the command stack. */ 619 if (ex_run_str(sp, NULL, p, len, 0, 0)) 620 return (1); 621 622 /* Set up the switch. */ 623 sp->nextdisp = sp->ccl_parent; 624 F_SET(sp, SC_EXIT); 625 return (0); 626 } 627 628 /* 629 * v_ecl_log -- 630 * Log a command into the colon command-line log file. 631 */ 632 static int 633 v_ecl_log(sp, tp) 634 SCR *sp; 635 TEXT *tp; 636 { 637 EXF *save_ep; 638 recno_t lno; 639 int rval; 640 641 /* Initialize the screen, if necessary. */ 642 if (sp->gp->ccl_sp == NULL && v_ecl_init(sp)) 643 return (1); 644 645 /* 646 * Don't log colon command window commands into the colon command 647 * window... 648 */ 649 if (sp->ep == sp->gp->ccl_sp->ep) 650 return (0); 651 652 /* 653 * XXX 654 * Swap the current EXF with the colon command file EXF. This 655 * isn't pretty, but too many routines "know" that sp->ep points 656 * to the current EXF. 657 */ 658 save_ep = sp->ep; 659 sp->ep = sp->gp->ccl_sp->ep; 660 if (db_last(sp, &lno)) { 661 sp->ep = save_ep; 662 return (1); 663 } 664 rval = db_append(sp, 0, lno, tp->lb, tp->len); 665 sp->ep = save_ep; 666 return (rval); 667 } 668 669 /* 670 * v_ecl_init -- 671 * Initialize the colon command-line log file. 672 */ 673 static int 674 v_ecl_init(sp) 675 SCR *sp; 676 { 677 FREF *frp; 678 GS *gp; 679 680 gp = sp->gp; 681 682 /* Get a temporary file. */ 683 if ((frp = file_add(sp, NULL)) == NULL) 684 return (1); 685 686 /* 687 * XXX 688 * Create a screen -- the file initialization code wants one. 689 */ 690 if (screen_init(gp, sp, &gp->ccl_sp)) 691 return (1); 692 if (file_init(gp->ccl_sp, frp, NULL, 0)) { 693 (void)screen_end(gp->ccl_sp); 694 return (1); 695 } 696 697 /* The underlying file isn't recoverable. */ 698 F_CLR(gp->ccl_sp->ep, F_RCV_ON); 699 700 return (0); 701 } 702