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[] = "$Id: v_ex.c,v 10.61 2011/12/22 18:41:53 zy Exp $"; 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(SCR *sp, VICMD *vp) 44 { 45 EXCMD cmd; 46 47 ex_cinit(sp, &cmd, C_SUBAGAIN, 2, vp->m_start.lno, vp->m_start.lno, 1); 48 argv_exp0(sp, &cmd, L(""), 1); 49 return (v_exec_ex(sp, vp, &cmd)); 50 } 51 52 /* 53 * v_exmode -- Q 54 * Switch the editor into EX mode. 55 * 56 * PUBLIC: int v_exmode __P((SCR *, VICMD *)); 57 */ 58 int 59 v_exmode(SCR *sp, VICMD *vp) 60 { 61 GS *gp; 62 63 gp = sp->gp; 64 65 /* Try and switch screens -- the screen may not permit it. */ 66 if (gp->scr_screen(sp, SC_EX)) { 67 msgq(sp, M_ERR, 68 "207|The Q command requires the ex terminal interface"); 69 return (1); 70 } 71 (void)gp->scr_attr(sp, SA_ALTERNATE, 0); 72 73 /* Save the current cursor position. */ 74 sp->frp->lno = sp->lno; 75 sp->frp->cno = sp->cno; 76 F_SET(sp->frp, FR_CURSORSET); 77 78 /* Switch to ex mode. */ 79 F_CLR(sp, SC_VI | SC_SCR_VI); 80 F_SET(sp, SC_EX); 81 82 /* Move out of the vi screen. */ 83 (void)ex_puts(sp, "\n"); 84 85 return (0); 86 } 87 88 /* 89 * v_join -- [count]J 90 * Join lines together. 91 * 92 * PUBLIC: int v_join __P((SCR *, VICMD *)); 93 */ 94 int 95 v_join(SCR *sp, VICMD *vp) 96 { 97 EXCMD cmd; 98 int lno; 99 100 /* 101 * YASC. 102 * The general rule is that '#J' joins # lines, counting the current 103 * line. However, 'J' and '1J' are the same as '2J', i.e. join the 104 * current and next lines. This doesn't map well into the ex command 105 * (which takes two line numbers), so we handle it here. Note that 106 * we never test for EOF -- historically going past the end of file 107 * worked just fine. 108 */ 109 lno = vp->m_start.lno + 1; 110 if (F_ISSET(vp, VC_C1SET) && vp->count > 2) 111 lno = vp->m_start.lno + (vp->count - 1); 112 113 ex_cinit(sp, &cmd, C_JOIN, 2, vp->m_start.lno, lno, 0); 114 return (v_exec_ex(sp, vp, &cmd)); 115 } 116 117 /* 118 * v_shiftl -- [count]<motion 119 * Shift lines left. 120 * 121 * PUBLIC: int v_shiftl __P((SCR *, VICMD *)); 122 */ 123 int 124 v_shiftl(SCR *sp, VICMD *vp) 125 { 126 EXCMD cmd; 127 128 ex_cinit(sp, &cmd, C_SHIFTL, 2, vp->m_start.lno, vp->m_stop.lno, 0); 129 argv_exp0(sp, &cmd, L("<"), 2); 130 return (v_exec_ex(sp, vp, &cmd)); 131 } 132 133 /* 134 * v_shiftr -- [count]>motion 135 * Shift lines right. 136 * 137 * PUBLIC: int v_shiftr __P((SCR *, VICMD *)); 138 */ 139 int 140 v_shiftr(SCR *sp, VICMD *vp) 141 { 142 EXCMD cmd; 143 144 ex_cinit(sp, &cmd, C_SHIFTR, 2, vp->m_start.lno, vp->m_stop.lno, 0); 145 argv_exp0(sp, &cmd, L(">"), 2); 146 return (v_exec_ex(sp, vp, &cmd)); 147 } 148 149 /* 150 * v_suspend -- ^Z 151 * Suspend vi. 152 * 153 * PUBLIC: int v_suspend __P((SCR *, VICMD *)); 154 */ 155 int 156 v_suspend(SCR *sp, VICMD *vp) 157 { 158 EXCMD cmd; 159 160 ex_cinit(sp, &cmd, C_STOP, 0, OOBLNO, OOBLNO, 0); 161 argv_exp0(sp, &cmd, L("suspend"), SIZE(L("suspend"))); 162 return (v_exec_ex(sp, vp, &cmd)); 163 } 164 165 /* 166 * v_switch -- ^^ 167 * Switch to the previous file. 168 * 169 * PUBLIC: int v_switch __P((SCR *, VICMD *)); 170 */ 171 int 172 v_switch(SCR *sp, VICMD *vp) 173 { 174 EXCMD cmd; 175 char *name; 176 CHAR_T *wp; 177 size_t wlen; 178 179 /* 180 * Try the alternate file name, then the previous file 181 * name. Use the real name, not the user's current name. 182 */ 183 if ((name = sp->alt_name) == NULL) { 184 msgq(sp, M_ERR, "180|No previous file to edit"); 185 return (1); 186 } 187 188 /* If autowrite is set, write out the file. */ 189 if (file_m1(sp, 0, FS_ALL)) 190 return (1); 191 192 ex_cinit(sp, &cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0); 193 CHAR2INT(sp, name, strlen(name) + 1, wp, wlen); 194 argv_exp0(sp, &cmd, wp, wlen); 195 return (v_exec_ex(sp, vp, &cmd)); 196 } 197 198 /* 199 * v_tagpush -- ^[ 200 * Do a tag search on the cursor keyword. 201 * 202 * PUBLIC: int v_tagpush __P((SCR *, VICMD *)); 203 */ 204 int 205 v_tagpush(SCR *sp, VICMD *vp) 206 { 207 EXCMD cmd; 208 209 ex_cinit(sp, &cmd, C_TAG, 0, OOBLNO, 0, 0); 210 argv_exp0(sp, &cmd, VIP(sp)->keyw, STRLEN(VIP(sp)->keyw) + 1); 211 return (v_exec_ex(sp, vp, &cmd)); 212 } 213 214 /* 215 * v_tagpop -- ^T 216 * Pop the tags stack. 217 * 218 * PUBLIC: int v_tagpop __P((SCR *, VICMD *)); 219 */ 220 int 221 v_tagpop(SCR *sp, VICMD *vp) 222 { 223 EXCMD cmd; 224 225 ex_cinit(sp, &cmd, C_TAGPOP, 0, OOBLNO, 0, 0); 226 return (v_exec_ex(sp, vp, &cmd)); 227 } 228 229 /* 230 * v_filter -- [count]!motion command(s) 231 * Run range through shell commands, replacing text. 232 * 233 * PUBLIC: int v_filter __P((SCR *, VICMD *)); 234 */ 235 int 236 v_filter(SCR *sp, VICMD *vp) 237 { 238 EXCMD cmd; 239 TEXT *tp; 240 241 /* 242 * !!! 243 * Historical vi permitted "!!" in an empty file, and it's handled 244 * as a special case in the ex_bang routine. Don't modify this setup 245 * without understanding that one. In particular, note that we're 246 * manipulating the ex argument structures behind ex's back. 247 * 248 * !!! 249 * Historical vi did not permit the '!' command to be associated with 250 * a non-line oriented motion command, in general, although it did 251 * with search commands. So, !f; and !w would fail, but !/;<CR> 252 * would succeed, even if they all moved to the same location in the 253 * current line. I don't see any reason to disallow '!' using any of 254 * the possible motion commands. 255 * 256 * !!! 257 * Historical vi ran the last bang command if N or n was used as the 258 * search motion. 259 */ 260 if (F_ISSET(vp, VC_ISDOT) || 261 ISCMD(vp->rkp, 'N') || ISCMD(vp->rkp, 'n')) { 262 ex_cinit(sp, 263 &cmd, C_BANG, 2, vp->m_start.lno, vp->m_stop.lno, 0); 264 EXP(sp)->argsoff = 0; /* XXX */ 265 266 if (argv_exp1(sp, &cmd, L("!"), 1, 1)) 267 return (1); 268 cmd.argc = EXP(sp)->argsoff; /* XXX */ 269 cmd.argv = EXP(sp)->args; /* XXX */ 270 return (v_exec_ex(sp, vp, &cmd)); 271 } 272 273 /* Get the command from the user. */ 274 if (v_tcmd(sp, vp, 275 '!', TXT_BS | TXT_CR | TXT_ESCAPE | TXT_FILEC | TXT_PROMPT)) 276 return (1); 277 278 /* 279 * Check to see if the user changed their mind. 280 * 281 * !!! 282 * Entering <escape> on an empty line was historically an error, 283 * this implementation doesn't bother. 284 */ 285 tp = TAILQ_FIRST(sp->tiq); 286 if (tp->term != TERM_OK) { 287 vp->m_final.lno = sp->lno; 288 vp->m_final.cno = sp->cno; 289 return (0); 290 } 291 292 /* Home the cursor. */ 293 vs_home(sp); 294 295 ex_cinit(sp, &cmd, C_BANG, 2, vp->m_start.lno, vp->m_stop.lno, 0); 296 EXP(sp)->argsoff = 0; /* XXX */ 297 298 if (argv_exp1(sp, &cmd, tp->lb + 1, tp->len - 1, 1)) 299 return (1); 300 cmd.argc = EXP(sp)->argsoff; /* XXX */ 301 cmd.argv = EXP(sp)->args; /* XXX */ 302 return (v_exec_ex(sp, vp, &cmd)); 303 } 304 305 /* 306 * v_exec_ex -- 307 * Execute an ex command. 308 */ 309 static int 310 v_exec_ex(SCR *sp, VICMD *vp, EXCMD *exp) 311 { 312 int rval; 313 314 rval = exp->cmd->fn(sp, exp); 315 return (v_ex_done(sp, vp) || rval); 316 } 317 318 /* 319 * v_ex -- : 320 * Execute a colon command line. 321 * 322 * PUBLIC: int v_ex __P((SCR *, VICMD *)); 323 */ 324 int 325 v_ex(SCR *sp, VICMD *vp) 326 { 327 GS *gp; 328 TEXT *tp; 329 int do_cedit, do_resolution, ifcontinue; 330 331 gp = sp->gp; 332 333 /* 334 * !!! 335 * If we put out more than a single line of messages, or ex trashes 336 * the screen, the user may continue entering ex commands. We find 337 * this out when we do the screen/message resolution. We can't enter 338 * completely into ex mode however, because the user can elect to 339 * return into vi mode by entering any key, i.e. we have to be in raw 340 * mode. 341 */ 342 for (do_cedit = do_resolution = 0;;) { 343 /* 344 * !!! 345 * There may already be an ex command waiting to run. If 346 * so, we continue with it. 347 */ 348 if (!EXCMD_RUNNING(gp)) { 349 /* Get a command. */ 350 if (v_tcmd(sp, vp, ':', 351 TXT_BS | TXT_CEDIT | TXT_FILEC | TXT_PROMPT)) 352 return (1); 353 tp = TAILQ_FIRST(sp->tiq); 354 355 /* 356 * If the user entered a single <esc>, they want to 357 * edit their colon command history. If they already 358 * entered some text, move it into the edit history. 359 */ 360 if (tp->term == TERM_CEDIT) { 361 if (tp->len > 1 && v_ecl_log(sp, tp)) 362 return (1); 363 do_cedit = 1; 364 break; 365 } 366 367 /* If the user didn't enter anything, return. */ 368 if (tp->term == TERM_BS) 369 break; 370 371 /* If the user changed their mind, return. */ 372 if (tp->term != TERM_OK) 373 break; 374 375 /* Log the command. */ 376 if (O_STR(sp, O_CEDIT) != NULL && v_ecl_log(sp, tp)) 377 return (1); 378 379 /* Push a command on the command stack. */ 380 if (ex_run_str(sp, NULL, tp->lb, tp->len, 0, 1)) 381 return (1); 382 } 383 384 /* Home the cursor. */ 385 vs_home(sp); 386 387 /* 388 * !!! 389 * If the editor wrote the screen behind curses back, put out 390 * a <newline> so that we don't overwrite the user's command 391 * with its output or the next want-to-continue? message. This 392 * doesn't belong here, but I can't find another place to put 393 * it. See, we resolved the output from the last ex command, 394 * and the user entered another one. This is the only place 395 * where we have control before the ex command writes output. 396 * We could get control in vs_msg(), but we have no way to know 397 * if command didn't put out any output when we try and resolve 398 * this command. This fixes a bug where combinations of ex 399 * commands, e.g. ":set<CR>:!date<CR>:set" didn't look right. 400 */ 401 if (F_ISSET(sp, SC_SCR_EXWROTE)) 402 (void)putchar('\n'); 403 404 /* Call the ex parser. */ 405 (void)ex_cmd(sp); 406 407 /* Flush ex messages. */ 408 (void)ex_fflush(sp); 409 410 /* Resolve any messages. */ 411 if (vs_ex_resolve(sp, &ifcontinue)) 412 return (1); 413 414 /* 415 * Continue or return. If continuing, make sure that we 416 * eventually do resolution. 417 */ 418 if (!ifcontinue) 419 break; 420 do_resolution = 1; 421 422 /* If we're continuing, it's a new command. */ 423 ++sp->ccnt; 424 } 425 426 /* 427 * If the user previously continued an ex command, we have to do 428 * resolution to clean up the screen. Don't wait, we already did 429 * that. 430 */ 431 if (do_resolution) { 432 F_SET(sp, SC_EX_WAIT_NO); 433 if (vs_ex_resolve(sp, &ifcontinue)) 434 return (1); 435 } 436 437 /* Cleanup from the ex command. */ 438 if (v_ex_done(sp, vp)) 439 return (1); 440 441 /* The user may want to edit their colon command history. */ 442 if (do_cedit) 443 return (v_ecl(sp)); 444 445 return (0); 446 } 447 448 /* 449 * v_ex_done -- 450 * Cleanup from an ex command. 451 */ 452 static int 453 v_ex_done(SCR *sp, VICMD *vp) 454 { 455 size_t len; 456 457 /* 458 * The only cursor modifications are real, however, the underlying 459 * line may have changed; don't trust anything. This code has been 460 * a remarkably fertile place for bugs. Do a reality check on a 461 * cursor value, and make sure it's okay. If necessary, change it. 462 * Ex keeps track of the line number, but it cares less about the 463 * column and it may have disappeared. 464 * 465 * Don't trust ANYTHING. 466 * 467 * XXX 468 * Ex will soon have to start handling the column correctly; see 469 * the POSIX 1003.2 standard. 470 */ 471 if (db_eget(sp, sp->lno, NULL, &len, NULL)) { 472 sp->lno = 1; 473 sp->cno = 0; 474 } else if (sp->cno >= len) 475 sp->cno = len ? len - 1 : 0; 476 477 vp->m_final.lno = sp->lno; 478 vp->m_final.cno = sp->cno; 479 480 /* 481 * Don't re-adjust the cursor after executing an ex command, 482 * and ex movements are permanent. 483 */ 484 F_CLR(vp, VM_RCM_MASK); 485 F_SET(vp, VM_RCM_SET); 486 487 return (0); 488 } 489 490 /* 491 * v_ecl -- 492 * Start an edit window on the colon command-line commands. 493 */ 494 static int 495 v_ecl(SCR *sp) 496 { 497 GS *gp; 498 SCR *new; 499 500 /* Initialize the screen, if necessary. */ 501 gp = sp->gp; 502 if (gp->ccl_sp == NULL && v_ecl_init(sp)) 503 return (1); 504 505 /* Get a new screen. */ 506 if (screen_init(gp, sp, &new)) 507 return (1); 508 if (vs_split(sp, new, 1)) { 509 (void)screen_end(new); 510 return (1); 511 } 512 513 /* Attach to the screen. */ 514 new->ep = gp->ccl_sp->ep; 515 ++new->ep->refcnt; 516 517 new->frp = gp->ccl_sp->frp; 518 new->frp->flags = sp->frp->flags; 519 520 /* Move the cursor to the end. */ 521 (void)db_last(new, &new->lno); 522 if (new->lno == 0) 523 new->lno = 1; 524 525 /* Remember the originating window. */ 526 sp->ccl_parent = sp; 527 528 /* It's a special window. */ 529 F_SET(new, SC_COMEDIT); 530 531 #if defined(USE_WIDECHAR) && defined(USE_ICONV) 532 /* Bypass iconv on writing to DB. */ 533 o_set(new, O_FILEENCODING, OS_STRDUP, codeset(), 0); 534 #endif 535 536 /* Set up the switch. */ 537 sp->nextdisp = new; 538 F_SET(sp, SC_SSWITCH); 539 return (0); 540 } 541 542 /* 543 * v_ecl_exec -- 544 * Execute a command from a colon command-line window. 545 * 546 * PUBLIC: int v_ecl_exec __P((SCR *)); 547 */ 548 int 549 v_ecl_exec(SCR *sp) 550 { 551 size_t len; 552 CHAR_T *p; 553 554 if (db_get(sp, sp->lno, 0, &p, &len) && sp->lno == 1) { 555 v_emsg(sp, NULL, VIM_EMPTY); 556 return (1); 557 } 558 if (len == 0) { 559 msgq(sp, M_BERR, "307|No ex command to execute"); 560 return (1); 561 } 562 563 /* Push the command on the command stack. */ 564 if (ex_run_str(sp, NULL, p, len, 0, 0)) 565 return (1); 566 567 /* Set up the switch. */ 568 sp->nextdisp = sp->ccl_parent; 569 F_SET(sp, SC_EXIT); 570 return (0); 571 } 572 573 /* 574 * v_ecl_log -- 575 * Log a command into the colon command-line log file. 576 */ 577 static int 578 v_ecl_log(SCR *sp, TEXT *tp) 579 { 580 recno_t lno; 581 int rval; 582 CHAR_T *p; 583 size_t len; 584 SCR *ccl_sp; 585 586 /* Initialize the screen, if necessary. */ 587 if (sp->gp->ccl_sp == NULL && v_ecl_init(sp)) 588 return (1); 589 590 ccl_sp = sp->gp->ccl_sp; 591 592 /* 593 * Don't log colon command window commands into the colon command 594 * window... 595 */ 596 if (sp->ep == ccl_sp->ep) 597 return (0); 598 599 if (db_last(ccl_sp, &lno)) { 600 return (1); 601 } 602 /* Don't log line that is identical to previous one */ 603 if (lno > 0 && 604 !db_get(ccl_sp, lno, 0, &p, &len) && 605 len == tp->len && 606 !MEMCMP(tp->lb, p, len)) 607 rval = 0; 608 else { 609 rval = db_append(ccl_sp, 0, lno, tp->lb, tp->len); 610 /* XXXX end "transaction" on ccl */ 611 /* Is this still necessary now that we no longer hijack sp ? */ 612 log_cursor(ccl_sp); 613 } 614 615 return (rval); 616 } 617 618 /* 619 * v_ecl_init -- 620 * Initialize the colon command-line log file. 621 */ 622 static int 623 v_ecl_init(SCR *sp) 624 { 625 FREF *frp; 626 GS *gp; 627 628 gp = sp->gp; 629 630 /* Get a temporary file. */ 631 if ((frp = file_add(sp, NULL)) == NULL) 632 return (1); 633 634 /* 635 * XXX 636 * Create a screen -- the file initialization code wants one. 637 */ 638 if (screen_init(gp, sp, &gp->ccl_sp)) 639 return (1); 640 if (file_init(gp->ccl_sp, frp, NULL, 0)) { 641 (void)screen_end(gp->ccl_sp); 642 gp->ccl_sp = NULL; 643 return (1); 644 } 645 646 /* The underlying file isn't recoverable. */ 647 F_CLR(gp->ccl_sp->ep, F_RCV_ON); 648 649 return (0); 650 } 651