/* $OpenBSD: v_txt.c,v 1.36 2022/12/26 19:16:04 jmc Exp $ */ /*- * Copyright (c) 1993, 1994 * The Regents of the University of California. All rights reserved. * Copyright (c) 1992, 1993, 1994, 1995, 1996 * Keith Bostic. All rights reserved. * * See the LICENSE file for redistribution information. */ #include "config.h" #include <sys/queue.h> #include <sys/stat.h> #include <sys/time.h> #include <bitstring.h> #include <ctype.h> #include <errno.h> #include <limits.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include "../common/common.h" #include "vi.h" #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) static int txt_abbrev(SCR *, TEXT *, CHAR_T *, int, int *, int *); static void txt_ai_resolve(SCR *, TEXT *, int *); static TEXT *txt_backup(SCR *, TEXTH *, TEXT *, u_int32_t *); static int txt_dent(SCR *, TEXT *, int, int); static int txt_emark(SCR *, TEXT *, size_t); static void txt_err(SCR *, TEXTH *); static int txt_fc(SCR *, TEXT *, int *); static int txt_fc_col(SCR *, int, ARGS **); static int txt_hex(SCR *, TEXT *); static int txt_insch(SCR *, TEXT *, CHAR_T *, u_int); static int txt_isrch(SCR *, VICMD *, TEXT *, u_int8_t *); static int txt_map_end(SCR *); static int txt_map_init(SCR *); static int txt_margin(SCR *, TEXT *, TEXT *, int *, u_int32_t); static void txt_nomorech(SCR *); static void txt_Rresolve(SCR *, TEXTH *, TEXT *, const size_t); static int txt_resolve(SCR *, TEXTH *, u_int32_t); static int txt_showmatch(SCR *, TEXT *); static void txt_unmap(SCR *, TEXT *, u_int32_t *); /* Cursor character (space is hard to track on the screen). */ #if defined(DEBUG) && 0 #undef CH_CURSOR #define CH_CURSOR '+' #endif /* * v_tcmd -- * Fill a buffer from the terminal for vi. * * PUBLIC: int v_tcmd(SCR *, VICMD *, CHAR_T, u_int); */ int v_tcmd(SCR *sp, VICMD *vp, CHAR_T prompt, u_int flags) { /* Normally, we end up where we started. */ vp->m_final.lno = sp->lno; vp->m_final.cno = sp->cno; /* Initialize the map. */ if (txt_map_init(sp)) return (1); /* Move to the last line. */ sp->lno = TMAP[0].lno; sp->cno = 0; /* Don't update the modeline for now. */ F_SET(sp, SC_TINPUT_INFO); /* Set the input flags. */ LF_SET(TXT_APPENDEOL | TXT_CR | TXT_ESCAPE | TXT_INFOLINE | TXT_MAPINPUT); if (O_ISSET(sp, O_ALTWERASE)) LF_SET(TXT_ALTWERASE); if (O_ISSET(sp, O_TTYWERASE)) LF_SET(TXT_TTYWERASE); /* Do the input thing. */ if (v_txt(sp, vp, NULL, NULL, 0, prompt, 0, 1, flags)) return (1); /* Reenable the modeline updates. */ F_CLR(sp, SC_TINPUT_INFO); /* Clean up the map. */ if (txt_map_end(sp)) return (1); if (IS_ONELINE(sp)) F_SET(sp, SC_SCR_REDRAW); /* XXX */ /* Set the cursor to the resulting position. */ sp->lno = vp->m_final.lno; sp->cno = vp->m_final.cno; return (0); } /* * txt_map_init * Initialize the screen map for colon command-line input. */ static int txt_map_init(SCR *sp) { SMAP *esmp; VI_PRIVATE *vip; vip = VIP(sp); if (!IS_ONELINE(sp)) { /* * Fake like the user is doing input on the last line of the * screen. This makes all of the scrolling work correctly, * and allows us the use of the vi text editing routines, not * to mention practically infinite length ex commands. * * Save the current location. */ vip->sv_tm_lno = TMAP->lno; vip->sv_tm_soff = TMAP->soff; vip->sv_tm_coff = TMAP->coff; vip->sv_t_maxrows = sp->t_maxrows; vip->sv_t_minrows = sp->t_minrows; vip->sv_t_rows = sp->t_rows; /* * If it's a small screen, TMAP may be small for the screen. * Fix it, filling in fake lines as we go. */ if (IS_SMALL(sp)) for (esmp = HMAP + (sp->t_maxrows - 1); TMAP < esmp; ++TMAP) { TMAP[1].lno = TMAP[0].lno + 1; TMAP[1].coff = HMAP->coff; TMAP[1].soff = 1; } /* Build the fake entry. */ TMAP[1].lno = TMAP[0].lno + 1; TMAP[1].soff = 1; TMAP[1].coff = 0; SMAP_FLUSH(&TMAP[1]); ++TMAP; /* Reset the screen information. */ sp->t_rows = sp->t_minrows = ++sp->t_maxrows; } return (0); } /* * txt_map_end * Reset the screen map for colon command-line input. */ static int txt_map_end(SCR *sp) { VI_PRIVATE *vip; size_t cnt; vip = VIP(sp); if (!IS_ONELINE(sp)) { /* Restore the screen information. */ sp->t_rows = vip->sv_t_rows; sp->t_minrows = vip->sv_t_minrows; sp->t_maxrows = vip->sv_t_maxrows; /* * If it's a small screen, TMAP may be wrong. Clear any * lines that might have been overwritten. */ if (IS_SMALL(sp)) { for (cnt = sp->t_rows; cnt <= sp->t_maxrows; ++cnt) { (void)sp->gp->scr_move(sp, cnt, 0); (void)sp->gp->scr_clrtoeol(sp); } TMAP = HMAP + (sp->t_rows - 1); } else --TMAP; /* * The map may be wrong if the user entered more than one * (logical) line. Fix it. If the user entered a whole * screen, this will be slow, but we probably don't care. */ if (!O_ISSET(sp, O_LEFTRIGHT)) while (vip->sv_tm_lno != TMAP->lno || vip->sv_tm_soff != TMAP->soff) if (vs_sm_1down(sp)) return (1); } /* * Invalidate the cursor and the line size cache, the line never * really existed. This fixes bugs where the user searches for * the last line on the screen + 1 and the refresh routine thinks * that's where we just were. */ VI_SCR_CFLUSH(vip); F_SET(vip, VIP_CUR_INVALID); return (0); } /* * If doing input mapping on the colon command line, may need to unmap * based on the command. */ #define UNMAP_TST \ FL_ISSET(ec_flags, EC_MAPINPUT) && LF_ISSET(TXT_INFOLINE) /* * Internally, we maintain tp->lno and tp->cno, externally, everyone uses * sp->lno and sp->cno. Make them consistent as necessary. */ #define UPDATE_POSITION(sp, tp) { \ (sp)->lno = (tp)->lno; \ (sp)->cno = (tp)->cno; \ } /* * v_txt -- * Vi text input. * * PUBLIC: int v_txt(SCR *, VICMD *, MARK *, * PUBLIC: const char *, size_t, CHAR_T, recno_t, u_long, u_int32_t); */ int v_txt(SCR *sp, VICMD *vp, MARK *tm, const char *lp, size_t len, CHAR_T prompt, recno_t ai_line, u_long rcount, u_int32_t flags) { EVENT ev, *evp = NULL; /* Current event. */ EVENT fc; /* File name completion event. */ GS *gp; TEXT *ntp, *tp; /* Input text structures. */ TEXT ait; /* Autoindent text structure. */ TEXT wmt; /* Wrapmargin text structure. */ TEXTH *tiqh; VI_PRIVATE *vip; abb_t abb; /* State of abbreviation checks. */ carat_t carat; /* State of the "[^0]^D" sequences. */ quote_t quote; /* State of quotation. */ size_t owrite, insert; /* Temporary copies of TEXT fields. */ size_t margin; /* Wrapmargin value. */ size_t rcol; /* 0-N: insert offset in the replay buffer. */ size_t tcol; /* Temporary column. */ u_int32_t ec_flags; /* Input mapping flags. */ #define IS_RESTART 0x01 /* Reset the incremental search. */ #define IS_RUNNING 0x02 /* Incremental search turned on. */ u_int8_t is_flags; int abcnt, ab_turnoff; /* Abbreviation character count, switch. */ int filec_redraw; /* Redraw after the file completion routine. */ int hexcnt; /* Hex character count. */ int showmatch; /* Showmatch set on this character. */ int wm_set, wm_skip; /* Wrapmargin happened, blank skip flags. */ int max, tmp; char *p; gp = sp->gp; vip = VIP(sp); /* * Set the input flag, so tabs get displayed correctly * and everyone knows that the text buffer is in use. */ F_SET(sp, SC_TINPUT); /* * Get one TEXT structure with some initial buffer space, reusing * the last one if it's big enough. (All TEXT bookkeeping fields * default to 0 -- text_init() handles this.) If changing a line, * copy it into the TEXT buffer. */ tiqh = &sp->tiq; if (!TAILQ_EMPTY(tiqh)) { tp = TAILQ_FIRST(tiqh); if (TAILQ_NEXT(tp, q) || tp->lb_len < len + 32) { text_lfree(tiqh); goto newtp; } tp->ai = tp->insert = tp->offset = tp->owrite = 0; if (lp != NULL) { tp->len = len; memmove(tp->lb, lp, len); } else tp->len = 0; } else { newtp: if ((tp = text_init(sp, lp, len, len + 32)) == NULL) return (1); TAILQ_INSERT_HEAD(tiqh, tp, q); } /* Set default termination condition. */ tp->term = TERM_OK; /* Set the starting line, column. */ tp->lno = sp->lno; tp->cno = sp->cno; /* * Set the insert and overwrite counts. If overwriting characters, * do insertion afterward. If not overwriting characters, assume * doing insertion. If change is to a mark, emphasize it with an * CH_ENDMARK character. */ if (len) { if (LF_ISSET(TXT_OVERWRITE)) { tp->owrite = (tm->cno - tp->cno) + 1; tp->insert = (len - tm->cno) - 1; } else tp->insert = len - tp->cno; if (LF_ISSET(TXT_EMARK) && txt_emark(sp, tp, tm->cno)) return (1); } /* * Many of the special cases in text input are to handle autoindent * support. Somebody decided that it would be a good idea if "^^D" * and "0^D" deleted all of the autoindented characters. In an editor * that takes single character input from the user, this beggars the * imagination. Note also, "^^D" resets the next lines' autoindent, * but "0^D" doesn't. * * We assume that autoindent only happens on empty lines, so insert * and overwrite will be zero. If doing autoindent, figure out how * much indentation we need and fill it in. Update input column and * screen cursor as necessary. */ if (LF_ISSET(TXT_AUTOINDENT) && ai_line != OOBLNO) { if (v_txt_auto(sp, ai_line, NULL, 0, tp)) return (1); tp->cno = tp->ai; } else { /* * The cc and S commands have a special feature -- leading * <blank> characters are handled as autoindent characters. * Beauty! */ if (LF_ISSET(TXT_AICHARS)) { tp->offset = 0; tp->ai = tp->cno; } else tp->offset = tp->cno; } /* If getting a command buffer from the user, there may be a prompt. */ if (LF_ISSET(TXT_PROMPT)) { tp->lb[tp->cno++] = prompt; ++tp->len; ++tp->offset; } /* * If appending after the end-of-line, add a space into the buffer * and move the cursor right. This space is inserted, i.e. pushed * along, and then deleted when the line is resolved. Assumes that * the cursor is already positioned at the end of the line. This * avoids the nastiness of having the cursor reside on a magical * column, i.e. a column that doesn't really exist. The only down * side is that we may wrap lines or scroll the screen before it's * strictly necessary. Not a big deal. */ if (LF_ISSET(TXT_APPENDEOL)) { tp->lb[tp->cno] = CH_CURSOR; ++tp->len; ++tp->insert; (void)vs_change(sp, tp->lno, LINE_RESET); } /* * Historic practice is that the wrapmargin value was a distance * from the RIGHT-HAND margin, not the left. It's more useful to * us as a distance from the left-hand margin, i.e. the same as * the wraplen value. The wrapmargin option is historic practice. * Nvi added the wraplen option so that it would be possible to * edit files with consistent margins without knowing the number of * columns in the window. * * XXX * Setting margin causes a significant performance hit. Normally * we don't update the screen if there are keys waiting, but we * have to if margin is set, otherwise the screen routines don't * know where the cursor is. * * !!! * Abbreviated keys were affected by the wrapmargin option in the * historic 4BSD vi. Mapped keys were usually, but sometimes not. * See the comment in vi/v_text():set_txt_std for more information. * * !!! * One more special case. If an inserted <blank> character causes * wrapmargin to split the line, the next user entered character is * discarded if it's a <space> character. */ wm_set = wm_skip = 0; if (LF_ISSET(TXT_WRAPMARGIN)) if ((margin = O_VAL(sp, O_WRAPMARGIN)) != 0) margin = sp->cols - margin; else margin = O_VAL(sp, O_WRAPLEN); else margin = 0; /* Initialize abbreviation checks. */ abcnt = ab_turnoff = 0; abb = F_ISSET(gp, G_ABBREV) && LF_ISSET(TXT_MAPINPUT) ? AB_INWORD : AB_NOTSET; /* * Set up the dot command. Dot commands are done by saving the actual * characters and then reevaluating them so that things like wrapmargin * can change between the insert and the replay. * * !!! * Historically, vi did not remap or reabbreviate replayed input. (It * did beep at you if you changed an abbreviation and then replayed the * input. We're not that compatible.) We don't have to do anything to * avoid remapping, as we're not getting characters from the terminal * routines. Turn the abbreviation check off. * * XXX * It would be nice if we could swallow backspaces and such, but it's * not all that easy to do. What we can do is turn off the common * error messages during the replay. Otherwise, when the user enters * an illegal command, e.g., "Ia<erase><erase><erase><erase>b<escape>", * and then does a '.', they get a list of error messages after command * completion. */ rcol = 0; if (LF_ISSET(TXT_REPLAY)) { abb = AB_NOTSET; LF_CLR(TXT_RECORD); } /* Other text input mode setup. */ quote = Q_NOTSET; carat = C_NOTSET; FL_INIT(is_flags, LF_ISSET(TXT_SEARCHINCR) ? IS_RESTART | IS_RUNNING : 0); filec_redraw = hexcnt = showmatch = 0; /* Initialize input flags. */ ec_flags = LF_ISSET(TXT_MAPINPUT) ? EC_MAPINPUT : 0; /* Refresh the screen. */ UPDATE_POSITION(sp, tp); if (vs_refresh(sp, 1)) return (1); /* If it's dot, just do it now. */ if (F_ISSET(vp, VC_ISDOT)) goto replay; /* Get an event. */ evp = &ev; next: if (v_event_get(sp, evp, 0, ec_flags)) return (1); /* * If file completion overwrote part of the screen and nothing else has * been displayed, clean up. We don't do this as part of the normal * message resolution because we know the user is on the colon command * line and there's no reason to enter explicit characters to continue. */ if (filec_redraw && !F_ISSET(sp, SC_SCR_EXWROTE)) { filec_redraw = 0; fc.e_event = E_REPAINT; fc.e_flno = vip->totalcount >= sp->rows ? 1 : sp->rows - vip->totalcount; fc.e_tlno = sp->rows; vip->linecount = vip->lcontinue = vip->totalcount = 0; (void)vs_repaint(sp, &fc); (void)vs_refresh(sp, 1); } /* Deal with all non-character events. */ switch (evp->e_event) { case E_CHARACTER: break; case E_ERR: case E_EOF: F_SET(sp, SC_EXIT_FORCE); return (1); case E_REPAINT: if (vs_repaint(sp, &ev)) return (1); goto next; case E_WRESIZE: /* <resize> interrupts the input mode. */ v_emsg(sp, NULL, VIM_WRESIZE); /* FALLTHROUGH */ default: if (evp->e_event != E_INTERRUPT && evp->e_event != E_WRESIZE) v_event_err(sp, evp); /* * !!! * Historically, <interrupt> exited the user from text input * mode or cancelled a colon command, and returned to command * mode. It also beeped the terminal, but that seems a bit * excessive. */ /* * If we are recording, morph into <escape> key so that * we can repeat the command safely: there is no way to * invalidate the repetition of an instance of a command, * which would be the alternative possibility. * If we are not recording (most likely on the command line), * simply discard the input and return to command mode * so that an INTERRUPT doesn't become for example a file * completion request. -aymeric */ if (LF_ISSET(TXT_RECORD)) { evp->e_event = E_CHARACTER; evp->e_c = 033; evp->e_flags = 0; evp->e_value = K_ESCAPE; break; } else { tp->term = TERM_ESC; goto k_escape; } } /* * !!! * If the first character of the input is a nul, replay the previous * input. (Historically, it's okay to replay non-existent input.) * This was not documented as far as I know, and is a great test of vi * clones. */ if (LF_ISSET(TXT_RECORD) && rcol == 0 && evp->e_c == '\0') { if (vip->rep == NULL) goto done; abb = AB_NOTSET; LF_CLR(TXT_RECORD); LF_SET(TXT_REPLAY); goto replay; } /* * File name completion and colon command-line editing. We don't * have enough meta characters, so we expect people to overload * them. If the two characters are the same, then we do file name * completion if the cursor is past the first column, and do colon * command-line editing if it's not. */ if (quote == Q_NOTSET) { int L__cedit, L__filec; L__cedit = L__filec = 0; if (LF_ISSET(TXT_CEDIT) && O_STR(sp, O_CEDIT) != NULL && O_STR(sp, O_CEDIT)[0] == evp->e_c) L__cedit = 1; if (LF_ISSET(TXT_FILEC) && O_STR(sp, O_FILEC) != NULL && O_STR(sp, O_FILEC)[0] == evp->e_c) L__filec = 1; if (L__cedit == 1 && (L__filec == 0 || tp->cno == tp->offset)) { tp->term = TERM_CEDIT; goto k_escape; } if (L__filec == 1) { if (txt_fc(sp, tp, &filec_redraw)) goto err; goto resolve; } } /* Abbreviation overflow check. See comment in txt_abbrev(). */ #define MAX_ABBREVIATION_EXPANSION 256 if (F_ISSET(&evp->e_ch, CH_ABBREVIATED)) { if (++abcnt > MAX_ABBREVIATION_EXPANSION) { if (v_event_flush(sp, CH_ABBREVIATED)) msgq(sp, M_ERR, "Abbreviation exceeded expansion limit: characters discarded"); abcnt = 0; if (LF_ISSET(TXT_REPLAY)) goto done; goto resolve; } } else abcnt = 0; /* Check to see if the character fits into the replay buffers. */ if (LF_ISSET(TXT_RECORD)) { BINC_GOTO(sp, vip->rep, vip->rep_len, (rcol + 1) * sizeof(EVENT)); vip->rep[rcol++] = *evp; } replay: if (LF_ISSET(TXT_REPLAY)) evp = vip->rep + rcol++; /* Wrapmargin check for leading space. */ if (wm_skip) { wm_skip = 0; if (evp->e_c == ' ') goto resolve; } /* If quoted by someone else, simply insert the character. */ if (F_ISSET(&evp->e_ch, CH_QUOTED)) goto insq_ch; /* * !!! * If this character was quoted by a K_VLNEXT, replace the placeholder * (a carat) with the new character. We've already adjusted the cursor * because it has to appear on top of the placeholder character. * Historic practice. * * Skip tests for abbreviations; ":ab xa XA" followed by "ixa^V<space>" * doesn't perform an abbreviation. Special case, ^V^J (not ^V^M) is * the same as ^J, historically. */ if (quote == Q_VTHIS) { FL_CLR(ec_flags, EC_QUOTED); if (LF_ISSET(TXT_MAPINPUT)) FL_SET(ec_flags, EC_MAPINPUT); if (evp->e_value != K_NL) { quote = Q_NOTSET; goto insl_ch; } quote = Q_NOTSET; } /* * !!! * Translate "<CH_HEX>[isxdigit()]*" to a character with a hex value: * this test delimits the value by any non-hex character. Offset by * one, we use 0 to mean that we've found <CH_HEX>. */ if (hexcnt > 1 && !isxdigit(evp->e_c)) { hexcnt = 0; if (txt_hex(sp, tp)) goto err; } switch (evp->e_value) { case K_CR: /* Carriage return. */ case K_NL: /* New line. */ /* Return in script windows and the command line. */ k_cr: if (LF_ISSET(TXT_CR)) { /* * If this was a map, we may have not displayed * the line. Display it, just in case. * * If a script window and not the colon line, * push a <cr> so it gets executed. */ if (LF_ISSET(TXT_INFOLINE)) { if (vs_change(sp, tp->lno, LINE_RESET)) goto err; } else if (F_ISSET(sp, SC_SCRIPT)) (void)v_event_push(sp, NULL, "\r", 1, CH_NOMAP); /* Set term condition: if empty. */ if (tp->cno <= tp->offset) tp->term = TERM_CR; /* * Set term condition: if searching incrementally and * the user entered a pattern, return a completed * search, regardless if the entire pattern was found. */ if (FL_ISSET(is_flags, IS_RUNNING) && tp->cno >= tp->offset + 1) tp->term = TERM_SEARCH; goto k_escape; } #define LINE_RESOLVE { \ /* \ * Handle abbreviations. If there was one, discard the \ * replay characters. \ */ \ if (abb == AB_INWORD && \ !LF_ISSET(TXT_REPLAY) && F_ISSET(gp, G_ABBREV)) { \ if (txt_abbrev(sp, tp, &evp->e_c, \ LF_ISSET(TXT_INFOLINE), &tmp, \ &ab_turnoff)) \ goto err; \ if (tmp) { \ if (LF_ISSET(TXT_RECORD)) \ rcol -= tmp + 1; \ goto resolve; \ } \ } \ if (abb != AB_NOTSET) \ abb = AB_NOTWORD; \ if (UNMAP_TST) \ txt_unmap(sp, tp, &ec_flags); \ /* \ * Delete any appended cursor. It's possible to get in \ * situations where TXT_APPENDEOL is set but tp->insert \ * is 0 when using the R command and all the characters \ * are tp->owrite characters. \ */ \ if (LF_ISSET(TXT_APPENDEOL) && tp->insert > 0) { \ --tp->len; \ --tp->insert; \ } \ } LINE_RESOLVE; /* * Save the current line information for restoration in * txt_backup(), and set the line final length. */ tp->sv_len = tp->len; tp->sv_cno = tp->cno; tp->len = tp->cno; /* Update the old line. */ if (vs_change(sp, tp->lno, LINE_RESET)) goto err; /* * Historic practice, when the autoindent edit option was set, * was to delete <blank> characters following the inserted * newline. This affected the 'R', 'c', and 's' commands; 'c' * and 's' retained the insert characters only, 'R' moved the * overwrite and insert characters into the next TEXT structure. * We keep track of the number of characters erased for the 'R' * command so that the final resolution of the line is correct. */ tp->R_erase = 0; owrite = tp->owrite; insert = tp->insert; if (LF_ISSET(TXT_REPLACE) && owrite != 0) { for (p = tp->lb + tp->cno; owrite > 0 && isblank(*p); ++p, --owrite, ++tp->R_erase); if (owrite == 0) for (; insert > 0 && isblank(*p); ++p, ++tp->R_erase, --insert); } else { p = tp->lb + tp->cno + owrite; if (O_ISSET(sp, O_AUTOINDENT)) for (; insert > 0 && isblank(*p); ++p, --insert); owrite = 0; } /* * !!! * Create a new line and insert the new TEXT into the queue. * DON'T insert until the old line has been updated, or the * inserted line count in line.c:db_get() will be wrong. */ if ((ntp = text_init(sp, p, insert + owrite, insert + owrite + 32)) == NULL) goto err; TAILQ_INSERT_TAIL(&sp->tiq, ntp, q); /* Set up bookkeeping for the new line. */ ntp->insert = insert; ntp->owrite = owrite; ntp->lno = tp->lno + 1; /* * Reset the autoindent line value. 0^D keeps the autoindent * line from changing, ^D changes the level, even if there were * no characters in the old line. Note, if using the current * tp structure, use the cursor as the length, the autoindent * characters may have been erased. */ if (LF_ISSET(TXT_AUTOINDENT)) { if (carat == C_NOCHANGE) { if (v_txt_auto(sp, OOBLNO, &ait, ait.ai, ntp)) goto err; FREE_SPACE(sp, ait.lb, ait.lb_len); } else if (v_txt_auto(sp, OOBLNO, tp, tp->cno, ntp)) goto err; carat = C_NOTSET; } /* Reset the cursor. */ ntp->cno = ntp->ai; /* * If we're here because wrapmargin was set and we've broken a * line, there may be additional information (i.e. the start of * a line) in the wmt structure. */ if (wm_set) { if (wmt.offset != 0 || wmt.owrite != 0 || wmt.insert != 0) { #define WMTSPACE wmt.offset + wmt.owrite + wmt.insert BINC_GOTO(sp, ntp->lb, ntp->lb_len, ntp->len + WMTSPACE + 32); memmove(ntp->lb + ntp->cno, wmt.lb, WMTSPACE); ntp->len += WMTSPACE; ntp->cno += wmt.offset; ntp->owrite = wmt.owrite; ntp->insert = wmt.insert; } wm_set = 0; } /* New lines are TXT_APPENDEOL. */ if (ntp->owrite == 0 && ntp->insert == 0) { BINC_GOTO(sp, ntp->lb, ntp->lb_len, ntp->len + 1); LF_SET(TXT_APPENDEOL); ntp->lb[ntp->cno] = CH_CURSOR; ++ntp->insert; ++ntp->len; } /* Swap old and new TEXT's, and update the new line. */ tp = ntp; if (vs_change(sp, tp->lno, LINE_INSERT)) goto err; goto resolve; case K_ESCAPE: /* Escape. */ if (!LF_ISSET(TXT_ESCAPE)) goto ins_ch; /* If we have a count, start replaying the input. */ if (rcount > 1) { --rcount; rcol = 0; abb = AB_NOTSET; LF_CLR(TXT_RECORD); LF_SET(TXT_REPLAY); /* * Some commands (e.g. 'o') need a <newline> for each * repetition. */ if (LF_ISSET(TXT_ADDNEWLINE)) goto k_cr; /* * The R command turns into the 'a' command after the * first repetition. */ if (LF_ISSET(TXT_REPLACE)) { tp->insert = tp->owrite; tp->owrite = 0; LF_CLR(TXT_REPLACE); } goto replay; } /* Set term condition: if empty. */ if (tp->cno <= tp->offset) tp->term = TERM_ESC; /* * Set term condition: if searching incrementally and the user * entered a pattern, return a completed search, regardless if * the entire pattern was found. */ if (FL_ISSET(is_flags, IS_RUNNING) && tp->cno >= tp->offset + 1) tp->term = TERM_SEARCH; k_escape: LINE_RESOLVE; /* * Clean up for the 'R' command, restoring overwrite * characters, and making them into insert characters. */ if (LF_ISSET(TXT_REPLACE)) txt_Rresolve(sp, &sp->tiq, tp, len); /* * If there are any overwrite characters, copy down * any insert characters, and decrement the length. */ if (tp->owrite) { if (tp->insert) memmove(tp->lb + tp->cno, tp->lb + tp->cno + tp->owrite, tp->insert); tp->len -= tp->owrite; } /* * Optionally resolve the lines into the file. If not * resolving the lines into the file, end the line with * a nul. If the line is empty, then set the length to * 0, the termination condition has already been set. * * XXX * This is wrong, should pass back a length. */ if (LF_ISSET(TXT_RESOLVE)) { if (txt_resolve(sp, &sp->tiq, flags)) goto err; } else { BINC_GOTO(sp, tp->lb, tp->lb_len, tp->len + 1); tp->lb[tp->len] = '\0'; } /* * Set the return cursor position to rest on the last * inserted character. */ if (tp->cno != 0) --tp->cno; /* Update the last line. */ if (vs_change(sp, tp->lno, LINE_RESET)) return (1); goto done; case K_CARAT: /* Delete autoindent chars. */ if (tp->cno <= tp->ai && LF_ISSET(TXT_AUTOINDENT)) carat = C_CARATSET; goto ins_ch; case K_ZERO: /* Delete autoindent chars. */ if (tp->cno <= tp->ai && LF_ISSET(TXT_AUTOINDENT)) carat = C_ZEROSET; goto ins_ch; case K_CNTRLD: /* Delete autoindent char. */ /* * If in the first column or no characters to erase, ignore * the ^D (this matches historic practice). If not doing * autoindent or already inserted non-ai characters, it's a * literal. The latter test is done in the switch, as the * CARAT forms are N + 1, not N. */ if (!LF_ISSET(TXT_AUTOINDENT)) goto ins_ch; if (tp->cno == 0) goto resolve; switch (carat) { case C_CARATSET: /* ^^D */ if (tp->ai == 0 || tp->cno > tp->ai + tp->offset + 1) goto ins_ch; /* Save the ai string for later. */ ait.lb = NULL; ait.lb_len = 0; BINC_GOTO(sp, ait.lb, ait.lb_len, tp->ai); memmove(ait.lb, tp->lb, tp->ai); ait.ai = ait.len = tp->ai; carat = C_NOCHANGE; goto leftmargin; case C_ZEROSET: /* 0^D */ if (tp->ai == 0 || tp->cno > tp->ai + tp->offset + 1) goto ins_ch; carat = C_NOTSET; leftmargin: tp->lb[tp->cno - 1] = ' '; tp->owrite += tp->cno - tp->offset; tp->ai = 0; tp->cno = tp->offset; break; case C_NOTSET: /* ^D */ if (tp->ai == 0 || tp->cno > tp->ai + tp->offset) goto ins_ch; (void)txt_dent(sp, tp, O_SHIFTWIDTH, 0); break; default: abort(); } break; case K_VERASE: /* Erase the last character. */ /* If can erase over the prompt, return. */ if (tp->cno <= tp->offset && LF_ISSET(TXT_BS)) { tp->term = TERM_BS; goto done; } /* * If at the beginning of the line, try and drop back to a * previously inserted line. */ if (tp->cno == 0) { if ((ntp = txt_backup(sp, &sp->tiq, tp, &flags)) == NULL) goto err; tp = ntp; break; } /* If nothing to erase, bell the user. */ if (tp->cno <= tp->offset) { if (!LF_ISSET(TXT_REPLAY)) txt_nomorech(sp); break; } /* Drop back one character. */ --tp->cno; /* * Historically, vi didn't replace the erased characters with * <blank>s, presumably because it's easier to fix a minor * typing mistake and continue on if the previous letters are * already there. This is a problem for incremental searching, * because the user can no longer tell where they are in the * colon command line because the cursor is at the last search * point in the screen. So, if incrementally searching, erase * the erased characters from the screen. */ if (FL_ISSET(is_flags, IS_RUNNING)) tp->lb[tp->cno] = ' '; /* * Increment overwrite, decrement ai if deleted. * * !!! * Historic vi did not permit users to use erase characters * to delete autoindent characters. We do. Eat hot death, * POSIX. */ ++tp->owrite; if (tp->cno < tp->ai) --tp->ai; /* Reset if we deleted an incremental search character. */ if (FL_ISSET(is_flags, IS_RUNNING)) FL_SET(is_flags, IS_RESTART); break; case K_VWERASE: /* Skip back one word. */ /* * If at the beginning of the line, try and drop back to a * previously inserted line. */ if (tp->cno == 0) { if ((ntp = txt_backup(sp, &sp->tiq, tp, &flags)) == NULL) goto err; tp = ntp; } /* * If at offset, nothing to erase so bell the user. */ if (tp->cno <= tp->offset) { if (!LF_ISSET(TXT_REPLAY)) txt_nomorech(sp); break; } /* * The first werase goes back to any autoindent column and the * second werase goes back to the offset. * * !!! * Historic vi did not permit users to use erase characters to * delete autoindent characters. */ if (tp->ai && tp->cno > tp->ai) max = tp->ai; else { tp->ai = 0; max = tp->offset; } /* Skip over trailing space characters. */ while (tp->cno > max && isblank(tp->lb[tp->cno - 1])) { --tp->cno; ++tp->owrite; } if (tp->cno == max) break; /* * There are three types of word erase found on UNIX systems. * They can be identified by how the string /a/b/c is treated * -- as 1, 3, or 6 words. Historic vi had two classes of * characters, and strings were delimited by them and * <blank>'s, so, 6 words. The historic tty interface used * <blank>'s to delimit strings, so, 1 word. The algorithm * offered in the 4.4BSD tty interface (as stty altwerase) * treats it as 3 words -- there are two classes of * characters, and strings are delimited by them and * <blank>'s. The difference is that the type of the first * erased character erased is ignored, which is exactly right * when erasing pathname components. The edit options * TXT_ALTWERASE and TXT_TTYWERASE specify the 4.4BSD tty * interface and the historic tty driver behavior, * respectively, and the default is the same as the historic * vi behavior. * * Overwrite erased characters if doing incremental search; * see comment above. */ if (LF_ISSET(TXT_TTYWERASE)) while (tp->cno > max) { if (isblank(tp->lb[tp->cno - 1])) break; --tp->cno; ++tp->owrite; if (FL_ISSET(is_flags, IS_RUNNING)) tp->lb[tp->cno] = ' '; } else { if (LF_ISSET(TXT_ALTWERASE)) { --tp->cno; ++tp->owrite; if (FL_ISSET(is_flags, IS_RUNNING)) tp->lb[tp->cno] = ' '; } if (tp->cno > max) tmp = inword(tp->lb[tp->cno - 1]); while (tp->cno > max) { if (tmp != inword(tp->lb[tp->cno - 1]) || isblank(tp->lb[tp->cno - 1])) break; --tp->cno; ++tp->owrite; if (FL_ISSET(is_flags, IS_RUNNING)) tp->lb[tp->cno] = ' '; } } /* Reset if we deleted an incremental search character. */ if (FL_ISSET(is_flags, IS_RUNNING)) FL_SET(is_flags, IS_RESTART); break; case K_VKILL: /* Restart this line. */ /* * !!! * If at the beginning of the line, try and drop back to a * previously inserted line. Historic vi did not permit * users to go back to previous lines. */ if (tp->cno == 0) { if ((ntp = txt_backup(sp, &sp->tiq, tp, &flags)) == NULL) goto err; tp = ntp; } /* If at offset, nothing to erase so bell the user. */ if (tp->cno <= tp->offset) { if (!LF_ISSET(TXT_REPLAY)) txt_nomorech(sp); break; } /* * First kill goes back to any autoindent and second kill goes * back to the offset. * * !!! * Historic vi did not permit users to use erase characters to * delete autoindent characters. */ if (tp->ai && tp->cno > tp->ai) max = tp->ai; else { tp->ai = 0; max = tp->offset; } tp->owrite += tp->cno - max; /* * Overwrite erased characters if doing incremental search; * see comment above. */ if (FL_ISSET(is_flags, IS_RUNNING)) do { tp->lb[--tp->cno] = ' '; } while (tp->cno > max); else tp->cno = max; /* Reset if we deleted an incremental search character. */ if (FL_ISSET(is_flags, IS_RUNNING)) FL_SET(is_flags, IS_RESTART); break; case K_CNTRLT: /* Add autoindent characters. */ if (!LF_ISSET(TXT_CNTRLT)) goto ins_ch; if (txt_dent(sp, tp, O_SHIFTWIDTH, 1)) goto err; goto ebuf_chk; case K_RIGHTBRACE: case K_RIGHTPAREN: if (LF_ISSET(TXT_SHOWMATCH)) showmatch = 1; goto ins_ch; case K_VLNEXT: /* Quote next character. */ evp->e_c = '^'; quote = Q_VNEXT; /* * Turn on the quote flag so that the underlying routines * quote the next character where it's possible. Turn off * the input mapbiting flag so that we don't remap the next * character. */ FL_SET(ec_flags, EC_QUOTED); FL_CLR(ec_flags, EC_MAPINPUT); /* * !!! * Skip the tests for abbreviations, so ":ab xa XA", * "ixa^V<space>" doesn't perform the abbreviation. */ goto insl_ch; case K_HEXCHAR: hexcnt = 1; goto insq_ch; case K_TAB: if (sp->showmode != SM_COMMAND && quote != Q_VTHIS && O_ISSET(sp, O_EXPANDTAB)) { if (txt_dent(sp, tp, O_TABSTOP, 1)) goto err; goto ebuf_chk; } goto insq_ch; default: /* Insert the character. */ ins_ch: /* * Historically, vi eliminated nul's out of hand. If the * beautify option was set, it also deleted any unknown * ASCII value less than space (040) and the del character * (0177), except for tabs. Unknown is a key word here. * Most vi documentation claims that it deleted everything * but <tab>, <nl> and <ff>, as that's what the original * 4BSD documentation said. This is obviously wrong, * however, as <esc> would be included in that list. What * we do is eliminate any unquoted, iscntrl() character that * wasn't a replay and wasn't handled specially, except * <tab> or <ff>. */ if (LF_ISSET(TXT_BEAUTIFY) && iscntrl(evp->e_c) && evp->e_value != K_FORMFEED && evp->e_value != K_TAB) { msgq(sp, M_BERR, "Illegal character; quote to enter"); if (LF_ISSET(TXT_REPLAY)) goto done; break; } insq_ch: /* * If entering a non-word character after a word, check for * abbreviations. If there was one, discard replay characters. * If entering a blank character, check for unmap commands, * as well. */ if (!inword(evp->e_c)) { if (abb == AB_INWORD && !LF_ISSET(TXT_REPLAY) && F_ISSET(gp, G_ABBREV)) { if (txt_abbrev(sp, tp, &evp->e_c, LF_ISSET(TXT_INFOLINE), &tmp, &ab_turnoff)) goto err; if (tmp) { if (LF_ISSET(TXT_RECORD)) rcol -= tmp + 1; goto resolve; } } if (isblank(evp->e_c) && UNMAP_TST) txt_unmap(sp, tp, &ec_flags); } if (abb != AB_NOTSET) abb = inword(evp->e_c) ? AB_INWORD : AB_NOTWORD; insl_ch: if (txt_insch(sp, tp, &evp->e_c, flags)) goto err; /* * If we're using K_VLNEXT to quote the next character, then * we want the cursor to position itself on the ^ placeholder * we're displaying, to match historic practice. */ if (quote == Q_VNEXT) { --tp->cno; ++tp->owrite; } /* * !!! * Translate "<CH_HEX>[isxdigit()]*" to a character with * a hex value: this test delimits the value by the max * number of hex bytes. Offset by one, we use 0 to mean * that we've found <CH_HEX>. */ if (hexcnt != 0 && hexcnt++ == sizeof(CHAR_T) * 2 + 1) { hexcnt = 0; if (txt_hex(sp, tp)) goto err; } /* * Check to see if we've crossed the margin. * * !!! * In the historic vi, the wrapmargin value was figured out * using the display widths of the characters, i.e. <tab> * characters were counted as two characters if the list edit * option is set, but as the tabstop edit option number of * characters otherwise. That's what the vs_column() function * gives us, so we use it. */ if (margin != 0) { if (vs_column(sp, &tcol)) goto err; if (tcol >= margin) { if (txt_margin(sp, tp, &wmt, &tmp, flags)) goto err; if (tmp) { if (isblank(evp->e_c)) wm_skip = 1; wm_set = 1; goto k_cr; } } } /* * If we've reached the end of the buffer, then we need to * switch into insert mode. This happens when there's a * change to a mark and the user puts in more characters than * the length of the motion. */ ebuf_chk: if (tp->cno >= tp->len) { BINC_GOTO(sp, tp->lb, tp->lb_len, tp->len + 1); LF_SET(TXT_APPENDEOL); tp->lb[tp->cno] = CH_CURSOR; ++tp->insert; ++tp->len; } /* Step the quote state forward. */ if (quote != Q_NOTSET) { if (quote == Q_VNEXT) quote = Q_VTHIS; } break; } #ifdef DEBUG if (tp->cno + tp->insert + tp->owrite != tp->len) { msgq(sp, M_ERR, "len %u != cno: %u ai: %u insert %u overwrite %u", tp->len, tp->cno, tp->ai, tp->insert, tp->owrite); if (LF_ISSET(TXT_REPLAY)) goto done; tp->len = tp->cno + tp->insert + tp->owrite; } #endif resolve:/* * 1: If we don't need to know where the cursor really is and we're * replaying text, keep going. */ if (margin == 0 && LF_ISSET(TXT_REPLAY)) goto replay; /* * 2: Reset the line. Don't bother unless we're about to wait on * a character or we need to know where the cursor really is. * We have to do this before showing matching characters so the * user can see what they're matching. */ if ((margin != 0 || !KEYS_WAITING(sp)) && vs_change(sp, tp->lno, LINE_RESET)) return (1); /* * 3: If there aren't keys waiting, display the matching character. * We have to do this before resolving any messages, otherwise * the error message from a missing match won't appear correctly. */ if (showmatch) { if (!KEYS_WAITING(sp) && txt_showmatch(sp, tp)) return (1); showmatch = 0; } /* * 4: If there have been messages and we're not editing on the colon * command line or doing file name completion, resolve them. */ if ((vip->totalcount != 0 || F_ISSET(gp, G_BELLSCHED)) && !F_ISSET(sp, SC_TINPUT_INFO) && !filec_redraw && vs_resolve(sp, NULL, 0)) return (1); /* * 5: Refresh the screen if we're about to wait on a character or we * need to know where the cursor really is. */ if (margin != 0 || !KEYS_WAITING(sp)) { UPDATE_POSITION(sp, tp); if (vs_refresh(sp, margin != 0)) return (1); } /* 6: Proceed with the incremental search. */ if (FL_ISSET(is_flags, IS_RUNNING) && txt_isrch(sp, vp, tp, &is_flags)) return (1); /* 7: Next character... */ if (LF_ISSET(TXT_REPLAY)) goto replay; goto next; done: /* Leave input mode. */ F_CLR(sp, SC_TINPUT); /* If recording for playback, save it. */ if (LF_ISSET(TXT_RECORD)) vip->rep_cnt = rcol; /* * If not working on the colon command line, set the final cursor * position. */ if (!F_ISSET(sp, SC_TINPUT_INFO)) { vp->m_final.lno = tp->lno; vp->m_final.cno = tp->cno; } return (0); err: alloc_err: F_CLR(sp, SC_TINPUT); txt_err(sp, &sp->tiq); return (1); } /* * txt_abbrev -- * Handle abbreviations. */ static int txt_abbrev(SCR *sp, TEXT *tp, CHAR_T *pushcp, int isinfoline, int *didsubp, int *turnoffp) { CHAR_T ch, *p; SEQ *qp; size_t len, off; /* Check to make sure we're not at the start of an append. */ *didsubp = 0; if (tp->cno == tp->offset) return (0); /* * Find the start of the "word". * * !!! * We match historic practice, which, as far as I can tell, had an * off-by-one error. The way this worked was that when the inserted * text switched from a "word" character to a non-word character, * vi would check for possible abbreviations. It would then take the * type (i.e. word/non-word) of the character entered TWO characters * ago, and move backward in the text until reaching a character that * was not that type, or the beginning of the insert, the line, or * the file. For example, in the string "abc<space>", when the <space> * character triggered the abbreviation check, the type of the 'b' * character was used for moving through the string. Maybe there's a * reason for not using the first (i.e. 'c') character, but I can't * think of one. * * Terminate at the beginning of the insert or the character after the * offset character -- both can be tested for using tp->offset. */ off = tp->cno - 1; /* Previous character. */ p = tp->lb + off; len = 1; /* One character test. */ if (off == tp->offset || isblank(p[-1])) goto search; if (inword(p[-1])) /* Move backward to change. */ for (;;) { --off; --p; ++len; if (off == tp->offset || !inword(p[-1])) break; } else for (;;) { --off; --p; ++len; if (off == tp->offset || inword(p[-1]) || isblank(p[-1])) break; } /* * !!! * Historic vi exploded abbreviations on the command line. This has * obvious problems in that unabbreviating the string can be extremely * tricky, particularly if the string has, say, an embedded escape * character. Personally, I think it's a stunningly bad idea. Other * examples of problems this caused in historic vi are: * :ab foo bar * :ab foo baz * results in "bar" being abbreviated to "baz", which wasn't what the * user had in mind at all. Also, the commands: * :ab foo bar * :unab foo<space> * resulted in an error message that "bar" wasn't mapped. Finally, * since the string was already exploded by the time the unabbreviate * command got it, all it knew was that an abbreviation had occurred. * Cleverly, it checked the replacement string for its unabbreviation * match, which meant that the commands: * :ab foo1 bar * :ab foo2 bar * :unab foo2 * unabbreviate "foo1", and the commands: * :ab foo bar * :ab bar baz * unabbreviate "foo"! * * Anyway, people neglected to first ask my opinion before they wrote * macros that depend on this stuff, so, we make this work as follows. * When checking for an abbreviation on the command line, if we get a * string which is <blank> terminated and which starts at the beginning * of the line, we check to see it is the abbreviate or unabbreviate * commands. If it is, turn abbreviations off and return as if no * abbreviation was found. Note also, minor trickiness, so that if * the user erases the line and starts another command, we turn the * abbreviations back on. * * This makes the layering look like a Nachos Supreme. */ search: if (isinfoline) { if (off == tp->ai || off == tp->offset) if (ex_is_abbrev(p, len)) { *turnoffp = 1; return (0); } else *turnoffp = 0; else if (*turnoffp) return (0); } /* Check for any abbreviations. */ if ((qp = seq_find(sp, NULL, NULL, p, len, SEQ_ABBREV, NULL)) == NULL) return (0); /* * Push the abbreviation onto the tty stack. Historically, characters * resulting from an abbreviation expansion were themselves subject to * map expansions, O_SHOWMATCH matching etc. This means the expanded * characters will be re-tested for abbreviations. It's difficult to * know what historic practice in this case was, since abbreviations * were applied to :colon command lines, so entering abbreviations that * looped was tricky, although possible. In addition, obvious loops * didn't work as expected. (The command ':ab a b|ab b c|ab c a' will * silently only implement and/or display the last abbreviation.) * * This implementation doesn't recover well from such abbreviations. * The main input loop counts abbreviated characters, and, when it * reaches a limit, discards any abbreviated characters on the queue. * It's difficult to back up to the original position, as the replay * queue would have to be adjusted, and the line state when an initial * abbreviated character was received would have to be saved. */ ch = *pushcp; if (v_event_push(sp, NULL, &ch, 1, CH_ABBREVIATED)) return (1); if (v_event_push(sp, NULL, qp->output, qp->olen, CH_ABBREVIATED)) return (1); /* * If the size of the abbreviation is larger than or equal to the size * of the original text, move to the start of the replaced characters, * and add their length to the overwrite count. * * If the abbreviation is smaller than the original text, we have to * delete the additional overwrite characters and copy down any insert * characters. */ tp->cno -= len; if (qp->olen >= len) tp->owrite += len; else { if (tp->insert) memmove(tp->lb + tp->cno + qp->olen, tp->lb + tp->cno + tp->owrite + len, tp->insert); tp->owrite += qp->olen; tp->len -= len - qp->olen; } /* * We return the length of the abbreviated characters. This is so * the calling routine can replace the replay characters with the * abbreviation. This means that subsequent '.' commands will produce * the same text, regardless of intervening :[un]abbreviate commands. * This is historic practice. */ *didsubp = len; return (0); } /* * txt_unmap -- * Handle the unmap command. */ static void txt_unmap(SCR *sp, TEXT *tp, u_int32_t *ec_flagsp) { size_t len, off; char *p; /* Find the beginning of this "word". */ for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --p, --off) { if (isblank(*p)) { ++p; break; } ++len; if (off == tp->ai || off == tp->offset) break; } /* * !!! * Historic vi exploded input mappings on the command line. See the * txt_abbrev() routine for an explanation of the problems inherent * in this. * * We make this work as follows. If we get a string which is <blank> * terminated and which starts at the beginning of the line, we check * to see it is the unmap command. If it is, we return that the input * mapping should be turned off. Note also, minor trickiness, so that * if the user erases the line and starts another command, we go ahead * an turn mapping back on. */ if ((off == tp->ai || off == tp->offset) && ex_is_unmap(p, len)) FL_CLR(*ec_flagsp, EC_MAPINPUT); else FL_SET(*ec_flagsp, EC_MAPINPUT); } /* * txt_ai_resolve -- * When a line is resolved by <esc>, review autoindent characters. */ static void txt_ai_resolve(SCR *sp, TEXT *tp, int *changedp) { u_long ts; int del; size_t cno, len, new, old, scno, spaces, tab_after_sp, tabs; char *p; *changedp = 0; /* * If the line is empty, has an offset, or no autoindent * characters, we're done. */ if (!tp->len || tp->offset || !tp->ai) return; /* * If the length is less than or equal to the autoindent * characters, delete them. */ if (tp->len <= tp->ai) { tp->ai = tp->cno = tp->len = 0; return; } /* * The autoindent characters plus any leading <blank> characters * in the line are resolved into the minimum number of characters. * Historic practice. */ ts = O_VAL(sp, O_TABSTOP); /* Figure out the last <blank> screen column. */ for (p = tp->lb, scno = 0, len = tp->len, spaces = tab_after_sp = 0; len-- && isblank(*p); ++p) if (*p == '\t') { if (spaces) tab_after_sp = 1; scno += COL_OFF(scno, ts); } else { ++spaces; ++scno; } /* * If there are no spaces, or no tabs after spaces and less than * ts spaces, it's already minimal. * Keep analysing if expandtab is set. */ if ((!spaces || (!tab_after_sp && spaces < ts)) && !O_ISSET(sp, O_EXPANDTAB)) return; /* Count up spaces/tabs needed to get to the target. */ cno = 0; tabs = 0; if (!O_ISSET(sp, O_EXPANDTAB)) { for (; cno + COL_OFF(cno, ts) <= scno; ++tabs) cno += COL_OFF(cno, ts); } spaces = scno - cno; /* * Figure out how many characters we're dropping -- if we're not * dropping any, it's already minimal, we're done. */ old = p - tp->lb; new = spaces + tabs; if (old == new) return; /* Shift the rest of the characters down, adjust the counts. */ del = old - new; memmove(p - del, p, tp->len - old); tp->len -= del; tp->cno -= del; /* Fill in space/tab characters. */ for (p = tp->lb; tabs--;) *p++ = '\t'; while (spaces--) *p++ = ' '; *changedp = 1; } /* * v_txt_auto -- * Handle autoindent. If aitp isn't NULL, use it, otherwise, * retrieve the line. * * PUBLIC: int v_txt_auto(SCR *, recno_t, TEXT *, size_t, TEXT *); */ int v_txt_auto(SCR *sp, recno_t lno, TEXT *aitp, size_t len, TEXT *tp) { size_t nlen; char *p, *t; if (aitp == NULL) { /* * If the ex append command is executed with an address of 0, * it's possible to get here with a line number of 0. Return * an indent of 0. */ if (lno == 0) { tp->ai = 0; return (0); } if (db_get(sp, lno, DBG_FATAL, &t, &len)) return (1); } else t = aitp->lb; /* Count whitespace characters. */ for (p = t; len > 0; ++p, --len) if (!isblank(*p)) break; /* Set count, check for no indentation. */ if ((nlen = (p - t)) == 0) return (0); /* Make sure the buffer's big enough. */ BINC_RET(sp, tp->lb, tp->lb_len, tp->len + nlen); /* Copy the buffer's current contents up. */ if (tp->len != 0) memmove(tp->lb + nlen, tp->lb, tp->len); tp->len += nlen; /* Copy the indentation into the new buffer. */ memmove(tp->lb, t, nlen); /* Set the autoindent count. */ tp->ai = nlen; return (0); } /* * txt_backup -- * Back up to the previously edited line. */ static TEXT * txt_backup(SCR *sp, TEXTH *tiqh, TEXT *tp, u_int32_t *flagsp) { TEXT *ntp; /* Get a handle on the previous TEXT structure. */ if ((ntp = TAILQ_PREV(tp, _texth, q)) == NULL) { if (!FL_ISSET(*flagsp, TXT_REPLAY)) msgq(sp, M_BERR, "Already at the beginning of the insert"); return (tp); } /* Bookkeeping. */ ntp->len = ntp->sv_len; /* Handle appending to the line. */ if (ntp->owrite == 0 && ntp->insert == 0) { ntp->lb[ntp->len] = CH_CURSOR; ++ntp->insert; ++ntp->len; FL_SET(*flagsp, TXT_APPENDEOL); } else FL_CLR(*flagsp, TXT_APPENDEOL); /* Release the current TEXT. */ TAILQ_REMOVE(tiqh, tp, q); text_free(tp); /* Update the old line on the screen. */ if (vs_change(sp, ntp->lno + 1, LINE_DELETE)) return (NULL); /* Return the new/current TEXT. */ return (ntp); } /* * Text indentation is truly strange. ^T and ^D do movements to the next or * previous shiftwidth value, i.e. for a 1-based numbering, with shiftwidth=3, * ^T moves a cursor on the 7th, 8th or 9th column to the 10th column, and ^D * moves it back. * * !!! * The ^T and ^D characters in historical vi had special meaning only when they * were the first characters entered after entering text input mode. As normal * erase characters couldn't erase autoindent characters (^T in this case), it * meant that inserting text into previously existing text was strange -- ^T * only worked if it was the first keystroke(s), and then could only be erased * using ^D. This implementation treats ^T specially anywhere it occurs in the * input, and permits the standard erase characters to erase the characters it * inserts. * * !!! * A fun test is to try: * :se sw=4 ai list * i<CR>^Tx<CR>^Tx<CR>^Tx<CR>^Dx<CR>^Dx<CR>^Dx<esc> * Historic vi loses some of the '$' marks on the line ends, but otherwise gets * it right. * * XXX * Technically, txt_dent should be part of the screen interface, as it requires * knowledge of character sizes, including <space>s, on the screen. It's here * because it's a complicated little beast, and I didn't want to shove it down * into the screen. It's probable that KEY_LEN will call into the screen once * there are screens with different character representations. * * txt_dent -- * Handle ^T indents, ^D outdents. * * If anything changes here, check the ex version to see if it needs similar * changes. */ static int txt_dent(SCR *sp, TEXT *tp, int swopt, int isindent) { CHAR_T ch; u_long sw, ts; size_t cno, current, spaces, target, tabs; int ai_reset; ts = O_VAL(sp, O_TABSTOP); sw = O_VAL(sp, swopt); /* * Since we don't know what precedes the character(s) being inserted * (or deleted), the preceding whitespace characters must be resolved. * An example is a <tab>, which doesn't need a full shiftwidth number * of columns because it's preceded by <space>s. This is easy to get * if the user sets shiftwidth to a value less than tabstop (or worse, * something for which tabstop isn't a multiple) and then uses ^T to * indent, and ^D to outdent. * * Figure out the current and target screen columns. In the historic * vi, the autoindent column was NOT determined using display widths * of characters as was the wrapmargin column. For that reason, we * can't use the vs_column() function, but have to calculate it here. * This is slow, but it's normally only on the first few characters of * a line. */ for (current = cno = 0; cno < tp->cno; ++cno) current += tp->lb[cno] == '\t' ? COL_OFF(current, ts) : KEY_LEN(sp, tp->lb[cno]); target = current; if (isindent) target += COL_OFF(target, sw); else { --target; target -= target % sw; } /* * The AI characters will be turned into overwrite characters if the * cursor immediately follows them. We test both the cursor position * and the indent flag because there's no single test. (^T can only * be detected by the cursor position, and while we know that the test * is always true for ^D, the cursor can be in more than one place, as * "0^D" and "^D" are different.) */ ai_reset = !isindent || tp->cno == tp->ai + tp->offset; /* * Back up over any previous <blank> characters, changing them into * overwrite characters (including any ai characters). Then figure * out the current screen column. */ for (; tp->cno > tp->offset && (tp->lb[tp->cno - 1] == ' ' || tp->lb[tp->cno - 1] == '\t'); --tp->cno, ++tp->owrite); for (current = cno = 0; cno < tp->cno; ++cno) current += tp->lb[cno] == '\t' ? COL_OFF(current, ts) : KEY_LEN(sp, tp->lb[cno]); /* * If we didn't move up to or past the target, it's because there * weren't enough characters to delete, e.g. the first character * of the line was a tp->offset character, and the user entered * ^D to move to the beginning of a line. An example of this is: * * :set ai sw=4<cr>i<space>a<esc>i^T^D * * Otherwise, count up the total spaces/tabs needed to get from the * beginning of the line (or the last non-<blank> character) to the * target. */ if (current >= target) spaces = tabs = 0; else { cno = current; tabs = 0; if (!O_ISSET(sp, O_EXPANDTAB)) { for (; cno + COL_OFF(cno, ts) <= target; ++tabs) cno += COL_OFF(cno, ts); } spaces = target - cno; } /* If we overwrote ai characters, reset the ai count. */ if (ai_reset) tp->ai = tabs + spaces; /* * Call txt_insch() to insert each character, so that we get the * correct effect when we add a <tab> to replace N <spaces>. */ for (ch = '\t'; tabs > 0; --tabs) (void)txt_insch(sp, tp, &ch, 0); for (ch = ' '; spaces > 0; --spaces) (void)txt_insch(sp, tp, &ch, 0); return (0); } /* * txt_fc -- * File name completion. */ static int txt_fc(SCR *sp, TEXT *tp, int *redrawp) { struct stat sb; ARGS **argv; CHAR_T s_ch; EXCMD cmd; size_t indx, len, nlen, off; int argc, trydir; char *p, *t; trydir = 0; *redrawp = 0; /* * Find the beginning of this "word" -- if we're at the beginning * of the line, it's a special case. */ if (tp->cno == 1) { len = 0; p = tp->lb; } else retry: for (len = 0, off = tp->cno - 1, p = tp->lb + off;; --off, --p) { if (isblank(*p)) { ++p; break; } ++len; if (off == tp->ai || off == tp->offset) break; } /* * Get enough space for a wildcard character. * * XXX * This won't work for "foo\", since the \ will escape the expansion * character. I'm not sure if that's a bug or not... */ off = p - tp->lb; BINC_RET(sp, tp->lb, tp->lb_len, tp->len + 1); p = tp->lb + off; s_ch = p[len]; p[len] = '*'; /* Build an ex command, and call the ex expansion routines. */ ex_cinit(&cmd, 0, 0, OOBLNO, OOBLNO, 0, NULL); if (argv_init(sp, &cmd)) return (1); if (argv_exp2(sp, &cmd, p, len + 1)) { p[len] = s_ch; return (0); } argc = cmd.argc; argv = cmd.argv; p[len] = s_ch; switch (argc) { case 0: /* No matches. */ if (!trydir) (void)sp->gp->scr_bell(sp); return (0); case 1: /* One match. */ /* If something changed, do the exchange. */ nlen = strlen(cmd.argv[0]->bp); if (len != nlen || memcmp(cmd.argv[0]->bp, p, len)) break; /* If haven't done a directory test, do it now. */ if (!trydir && !stat(cmd.argv[0]->bp, &sb) && S_ISDIR(sb.st_mode)) { p += len; goto isdir; } /* If nothing changed, period, ring the bell. */ if (!trydir) (void)sp->gp->scr_bell(sp); return (0); default: /* Multiple matches. */ *redrawp = 1; if (txt_fc_col(sp, argc, argv)) return (1); /* Find the length of the shortest match. */ for (nlen = cmd.argv[0]->len; --argc > 0;) { if (cmd.argv[argc]->len < nlen) nlen = cmd.argv[argc]->len; for (indx = 0; indx < nlen && cmd.argv[argc]->bp[indx] == cmd.argv[0]->bp[indx]; ++indx); nlen = indx; } break; } /* Overwrite the expanded text first. */ for (t = cmd.argv[0]->bp; len > 0 && nlen > 0; --len, --nlen) *p++ = *t++; /* If lost text, make the remaining old text overwrite characters. */ if (len) { tp->cno -= len; tp->owrite += len; } /* Overwrite any overwrite characters next. */ for (; nlen > 0 && tp->owrite > 0; --nlen, --tp->owrite, ++tp->cno) *p++ = *t++; /* Shift remaining text up, and move the cursor to the end. */ if (nlen) { off = p - tp->lb; BINC_RET(sp, tp->lb, tp->lb_len, tp->len + nlen); p = tp->lb + off; tp->cno += nlen; tp->len += nlen; if (tp->insert != 0) (void)memmove(p + nlen, p, tp->insert); while (nlen--) *p++ = *t++; } /* If a single match and it's a directory, retry it. */ if (argc == 1 && !stat(cmd.argv[0]->bp, &sb) && S_ISDIR(sb.st_mode)) { isdir: if (tp->owrite == 0) { off = p - tp->lb; BINC_RET(sp, tp->lb, tp->lb_len, tp->len + 1); p = tp->lb + off; if (tp->insert != 0) (void)memmove(p + 1, p, tp->insert); ++tp->len; } else --tp->owrite; ++tp->cno; *p++ = '/'; trydir = 1; goto retry; } return (0); } /* * txt_fc_col -- * Display file names for file name completion. */ static int txt_fc_col(SCR *sp, int argc, ARGS **argv) { ARGS **av; CHAR_T *p; GS *gp; size_t base, cnt, col, colwidth, numrows, numcols, prefix, row; int ac, nf, reset; gp = sp->gp; /* Trim any directory prefix common to all of the files. */ if ((p = strrchr(argv[0]->bp, '/')) == NULL) prefix = 0; else { prefix = (p - argv[0]->bp) + 1; for (ac = argc - 1, av = argv + 1; ac > 0; --ac, ++av) if (av[0]->len < prefix || memcmp(av[0]->bp, argv[0]->bp, prefix)) { prefix = 0; break; } } /* * Figure out the column width for the longest name. Output is done on * 6 character "tab" boundaries for no particular reason. (Since we * don't output tab characters, we ignore the terminal's tab settings.) * Ignore the user's tab setting because we have no idea how reasonable * it is. */ for (ac = argc, av = argv, colwidth = 0; ac > 0; --ac, ++av) { for (col = 0, p = av[0]->bp + prefix; *p != '\0'; ++p) col += KEY_LEN(sp, *p); if (col > colwidth) colwidth = col; } colwidth += COL_OFF(colwidth, 6); /* * Writing to the bottom line of the screen is always turned off when * SC_TINPUT_INFO is set. Turn it back on, we know what we're doing. */ if (F_ISSET(sp, SC_TINPUT_INFO)) { reset = 1; F_CLR(sp, SC_TINPUT_INFO); } else reset = 0; #define CHK_INTR \ if (F_ISSET(gp, G_INTERRUPTED)) \ goto intr; /* If the largest file name is too large, just print them. */ if (colwidth > sp->cols) { for (ac = argc, av = argv; ac > 0; --ac, ++av) { p = msg_print(sp, av[0]->bp + prefix, &nf); (void)ex_printf(sp, "%s\n", p); if (F_ISSET(gp, G_INTERRUPTED)) break; } if (nf) FREE_SPACE(sp, (char *) p, 0); CHK_INTR; } else { /* Figure out the number of columns. */ numcols = (sp->cols - 1) / colwidth; if (argc > numcols) { numrows = argc / numcols; if (argc % numcols) ++numrows; } else numrows = 1; /* Display the files in sorted order. */ for (row = 0; row < numrows; ++row) { for (base = row, col = 0; col < numcols; ++col) { p = msg_print(sp, argv[base]->bp + prefix, &nf); cnt = ex_printf(sp, "%s", p); if (nf) FREE_SPACE(sp, (char *) p, 0); CHK_INTR; if ((base += numrows) >= argc) break; (void)ex_printf(sp, "%*s", (int)(colwidth - cnt), ""); CHK_INTR; } (void)ex_puts(sp, "\n"); CHK_INTR; } (void)ex_puts(sp, "\n"); CHK_INTR; } (void)ex_fflush(sp); if (0) { intr: F_CLR(gp, G_INTERRUPTED); } if (reset) F_SET(sp, SC_TINPUT_INFO); return (0); } /* * txt_emark -- * Set the end mark on the line. */ static int txt_emark(SCR *sp, TEXT *tp, size_t cno) { CHAR_T ch, *kp; size_t chlen, nlen, olen; char *p; ch = CH_ENDMARK; /* * The end mark may not be the same size as the current character. * Don't let the line shift. */ nlen = KEY_LEN(sp, ch); if (tp->lb[cno] == '\t') (void)vs_columns(sp, tp->lb, tp->lno, &cno, &olen); else olen = KEY_LEN(sp, tp->lb[cno]); /* * If the line got longer, well, it's weird, but it's easy. If * it's the same length, it's easy. If it got shorter, we have * to fix it up. */ if (olen > nlen) { BINC_RET(sp, tp->lb, tp->lb_len, tp->len + olen); chlen = olen - nlen; if (tp->insert != 0) memmove(tp->lb + cno + 1 + chlen, tp->lb + cno + 1, tp->insert); tp->len += chlen; tp->owrite += chlen; p = tp->lb + cno; if (tp->lb[cno] == '\t') for (cno += chlen; chlen--;) *p++ = ' '; else for (kp = KEY_NAME(sp, tp->lb[cno]), cno += chlen; chlen--;) *p++ = *kp++; } tp->lb[cno] = ch; return (vs_change(sp, tp->lno, LINE_RESET)); } /* * txt_err -- * Handle an error during input processing. */ static void txt_err(SCR *sp, TEXTH *tiqh) { recno_t lno; /* * The problem with input processing is that the cursor is at an * indeterminate position since some input may have been lost due * to a malloc error. So, try to go back to the place from which * the cursor started, knowing that it may no longer be available. * * We depend on at least one line number being set in the text * chain. */ for (lno = TAILQ_FIRST(tiqh)->lno; !db_exist(sp, lno) && lno > 0; --lno); sp->lno = lno == 0 ? 1 : lno; sp->cno = 0; /* Redraw the screen, just in case. */ F_SET(sp, SC_SCR_REDRAW); } /* * txt_hex -- * Let the user insert any character value they want. * * !!! * This is an extension. The pattern "^X[0-9a-fA-F]*" is a way * for the user to specify a character value which their keyboard * may not be able to enter. */ static int txt_hex(SCR *sp, TEXT *tp) { CHAR_T savec; size_t len, off; u_long value; char *p, *wp; /* * Null-terminate the string. Since nul isn't a legal hex value, * this should be okay, and lets us use a local routine, which * presumably understands the character set, to convert the value. */ savec = tp->lb[tp->cno]; tp->lb[tp->cno] = 0; /* Find the previous CH_HEX character. */ for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --p, --off, ++len) { if (*p == CH_HEX) { wp = p + 1; break; } /* Not on this line? Shouldn't happen. */ if (off == tp->ai || off == tp->offset) goto nothex; } /* If length of 0, then it wasn't a hex value. */ if (len == 0) goto nothex; /* Get the value. */ errno = 0; value = strtol(wp, NULL, 16); if (errno || value > MAX_CHAR_T) { nothex: tp->lb[tp->cno] = savec; return (0); } /* Restore the original character. */ tp->lb[tp->cno] = savec; /* Adjust the bookkeeping. */ tp->cno -= len; tp->len -= len; tp->lb[tp->cno - 1] = value; /* Copy down any overwrite characters. */ if (tp->owrite) memmove(tp->lb + tp->cno, tp->lb + tp->cno + len, tp->owrite); /* Copy down any insert characters. */ if (tp->insert) memmove(tp->lb + tp->cno + tp->owrite, tp->lb + tp->cno + tp->owrite + len, tp->insert); return (0); } /* * txt_insch -- * * !!! * Historic vi did a special screen optimization for tab characters. As an * example, for the keystrokes "iabcd<esc>0C<tab>", the tab overwrote the * rest of the string when it was displayed. * * Because early versions of this implementation redisplayed the entire line * on each keystroke, the "bcd" was pushed to the right as it ignored that * the user had "promised" to change the rest of the characters. However, * the historic vi implementation had an even worse bug: given the keystrokes * "iabcd<esc>0R<tab><esc>", the "bcd" disappears, and magically reappears * on the second <esc> key. * * POSIX 1003.2 requires (will require) that this be fixed, specifying that * vi overwrite characters the user has committed to changing, on the basis * of the screen space they require, but that it not overwrite other characters. */ static int txt_insch(SCR *sp, TEXT *tp, CHAR_T *chp, u_int flags) { CHAR_T *kp, savech; size_t chlen, cno, copydown, olen, nlen; char *p; /* * The 'R' command does one-for-one replacement, because there's * no way to know how many characters the user intends to replace. */ if (LF_ISSET(TXT_REPLACE)) { if (tp->owrite) { --tp->owrite; tp->lb[tp->cno++] = *chp; return (0); } } else if (tp->owrite) { /* Overwrite a character. */ cno = tp->cno; /* * If the old or new characters are tabs, then the length of the * display depends on the character position in the display. We * don't even try to handle this here, just ask the screen. */ if (*chp == '\t') { savech = tp->lb[cno]; tp->lb[cno] = '\t'; (void)vs_columns(sp, tp->lb, tp->lno, &cno, &nlen); tp->lb[cno] = savech; } else nlen = KEY_LEN(sp, *chp); /* * Eat overwrite characters until we run out of them or we've * handled the length of the new character. If we only eat * part of an overwrite character, break it into its component * elements and display the remaining components. */ for (copydown = 0; nlen != 0 && tp->owrite != 0;) { --tp->owrite; if (tp->lb[cno] == '\t') (void)vs_columns(sp, tp->lb, tp->lno, &cno, &olen); else olen = KEY_LEN(sp, tp->lb[cno]); if (olen == nlen) { nlen = 0; break; } if (olen < nlen) { ++copydown; nlen -= olen; } else { BINC_RET(sp, tp->lb, tp->lb_len, tp->len + olen); chlen = olen - nlen; memmove(tp->lb + cno + 1 + chlen, tp->lb + cno + 1, tp->owrite + tp->insert); tp->len += chlen; tp->owrite += chlen; if (tp->lb[cno] == '\t') for (p = tp->lb + cno + 1; chlen--;) *p++ = ' '; else for (kp = KEY_NAME(sp, tp->lb[cno]) + nlen, p = tp->lb + cno + 1; chlen--;) *p++ = *kp++; nlen = 0; break; } } /* * If had to erase several characters, we adjust the total * count, and if there are any characters left, shift them * into position. */ if (copydown != 0 && (tp->len -= copydown) != 0) memmove(tp->lb + cno, tp->lb + cno + copydown, tp->owrite + tp->insert + copydown); /* If we had enough overwrite characters, we're done. */ if (nlen == 0) { tp->lb[tp->cno++] = *chp; return (0); } } /* Check to see if the character fits into the input buffer. */ BINC_RET(sp, tp->lb, tp->lb_len, tp->len + 1); ++tp->len; if (tp->insert) { /* Insert a character. */ if (tp->insert == 1) tp->lb[tp->cno + 1] = tp->lb[tp->cno]; else memmove(tp->lb + tp->cno + 1, tp->lb + tp->cno, tp->owrite + tp->insert); } tp->lb[tp->cno++] = *chp; return (0); } /* * txt_isrch -- * Do an incremental search. */ static int txt_isrch(SCR *sp, VICMD *vp, TEXT *tp, u_int8_t *is_flagsp) { MARK start; recno_t lno; u_int sf; /* If it's a one-line screen, we don't do incrementals. */ if (IS_ONELINE(sp)) { FL_CLR(*is_flagsp, IS_RUNNING); return (0); } /* * If the user erases back to the beginning of the buffer, there's * nothing to search for. Reset the cursor to the starting point. */ if (tp->cno <= 1) { vp->m_final = vp->m_start; return (0); } /* * If it's an RE quote character, and not quoted, ignore it until * we get another character. */ if (tp->lb[tp->cno - 1] == '\\' && (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\')) return (0); /* * If it's a magic shell character, and not quoted, reset the cursor * to the starting point. */ if (strchr(O_STR(sp, O_SHELLMETA), tp->lb[tp->cno - 1]) != NULL && (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\')) vp->m_final = vp->m_start; /* * If we see the search pattern termination character, then quit doing * an incremental search. There may be more, e.g., ":/foo/;/bar/", * and we can't handle that incrementally. Also, reset the cursor to * the original location, the ex search routines don't know anything * about incremental searches. */ if (tp->lb[0] == tp->lb[tp->cno - 1] && (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\')) { vp->m_final = vp->m_start; FL_CLR(*is_flagsp, IS_RUNNING); return (0); } /* * Remember the input line and discard the special input map, * but don't overwrite the input line on the screen. */ lno = tp->lno; F_SET(VIP(sp), VIP_S_MODELINE); F_CLR(sp, SC_TINPUT | SC_TINPUT_INFO); if (txt_map_end(sp)) return (1); /* * Specify a starting point and search. If we find a match, move to * it and refresh the screen. If we didn't find the match, then we * beep the screen. When searching from the original cursor position, * we have to move the cursor, otherwise, we don't want to move the * cursor in case the text at the current position continues to match. */ if (FL_ISSET(*is_flagsp, IS_RESTART)) { start = vp->m_start; sf = SEARCH_SET; } else { start = vp->m_final; sf = SEARCH_INCR | SEARCH_SET; } if (tp->lb[0] == '/' ? !f_search(sp, &start, &vp->m_final, tp->lb + 1, tp->cno - 1, NULL, sf) : !b_search(sp, &start, &vp->m_final, tp->lb + 1, tp->cno - 1, NULL, sf)) { sp->lno = vp->m_final.lno; sp->cno = vp->m_final.cno; FL_CLR(*is_flagsp, IS_RESTART); if (!KEYS_WAITING(sp) && vs_refresh(sp, 0)) return (1); } else FL_SET(*is_flagsp, IS_RESTART); /* Reinstantiate the special input map. */ if (txt_map_init(sp)) return (1); F_CLR(VIP(sp), VIP_S_MODELINE); F_SET(sp, SC_TINPUT | SC_TINPUT_INFO); /* Reset the line number of the input line. */ tp->lno = TMAP[0].lno; /* * If the colon command-line moved, i.e. the screen scrolled, * refresh the input line. * * XXX * We shouldn't be calling vs_line, here -- we need dirty bits * on entries in the SMAP array. */ if (lno != TMAP[0].lno) { if (vs_line(sp, &TMAP[0], NULL, NULL)) return (1); (void)sp->gp->scr_refresh(sp, 0); } return (0); } /* * txt_resolve -- * Resolve the input text chain into the file. */ static int txt_resolve(SCR *sp, TEXTH *tiqh, u_int32_t flags) { TEXT *tp; recno_t lno; int changed; /* * The first line replaces a current line, and all subsequent lines * are appended into the file. Resolve autoindented characters for * each line before committing it. If the latter causes the line to * change, we have to redisplay it, otherwise the information cached * about the line will be wrong. */ tp = TAILQ_FIRST(tiqh); if (LF_ISSET(TXT_AUTOINDENT)) txt_ai_resolve(sp, tp, &changed); else changed = 0; if (db_set(sp, tp->lno, tp->lb, tp->len) || (changed && vs_change(sp, tp->lno, LINE_RESET))) return (1); for (lno = tp->lno; (tp = TAILQ_NEXT(tp, q)); ++lno) { if (LF_ISSET(TXT_AUTOINDENT)) txt_ai_resolve(sp, tp, &changed); else changed = 0; if (db_append(sp, 0, lno, tp->lb, tp->len) || (changed && vs_change(sp, tp->lno, LINE_RESET))) return (1); } /* * Clear the input flag, the look-aside buffer is no longer valid. * Has to be done as part of text resolution, or upon return we'll * be looking at incorrect data. */ F_CLR(sp, SC_TINPUT); return (0); } /* * txt_showmatch -- * Show a character match. * * !!! * Historic vi tried to display matches even in the :colon command line. * I think not. */ static int txt_showmatch(SCR *sp, TEXT *tp) { VCS cs; MARK m; int cnt, endc, startc; /* * Do a refresh first, in case we haven't done one in awhile, * so the user can see what we're complaining about. */ UPDATE_POSITION(sp, tp); if (vs_refresh(sp, 1)) return (1); /* * We don't display the match if it's not on the screen. Find * out what the first character on the screen is. */ if (vs_sm_position(sp, &m, 0, P_TOP)) return (1); /* Initialize the getc() interface. */ cs.cs_lno = tp->lno; cs.cs_cno = tp->cno - 1; if (cs_init(sp, &cs)) return (1); startc = (endc = cs.cs_ch) == ')' ? '(' : '{'; /* Search for the match. */ for (cnt = 1;;) { if (cs_prev(sp, &cs)) return (1); if (cs.cs_flags != 0) { if (cs.cs_flags == CS_EOF || cs.cs_flags == CS_SOF) { msgq(sp, M_BERR, "Unmatched %s", KEY_NAME(sp, endc)); return (0); } continue; } if (cs.cs_ch == endc) ++cnt; else if (cs.cs_ch == startc && --cnt == 0) break; } /* If the match is on the screen, move to it. */ if (cs.cs_lno < m.lno || (cs.cs_lno == m.lno && cs.cs_cno < m.cno)) return (0); sp->lno = cs.cs_lno; sp->cno = cs.cs_cno; if (vs_refresh(sp, 1)) return (1); /* Wait for timeout or character arrival. */ return (v_event_get(sp, NULL, O_VAL(sp, O_MATCHTIME) * 100, EC_TIMEOUT)); } /* * txt_margin -- * Handle margin wrap. */ static int txt_margin(SCR *sp, TEXT *tp, TEXT *wmtp, int *didbreak, u_int32_t flags) { size_t len, off; char *p; /* Find the nearest previous blank. */ for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --off, --p, ++len) { if (isblank(*p)) break; /* * If reach the start of the line, there's nowhere to break. * * !!! * Historic vi belled each time a character was entered after * crossing the margin until a space was entered which could * be used to break the line. I don't as it tends to wake the * cats. */ if (off == tp->ai || off == tp->offset) { *didbreak = 0; return (0); } } /* * Store saved information about the rest of the line in the * wrapmargin TEXT structure. * * !!! * The offset field holds the length of the current characters * that the user entered, but which are getting split to the new * line -- it's going to be used to set the cursor value when we * move to the new line. */ wmtp->lb = p + 1; wmtp->offset = len; wmtp->insert = LF_ISSET(TXT_APPENDEOL) ? tp->insert - 1 : tp->insert; wmtp->owrite = tp->owrite; /* Correct current bookkeeping information. */ tp->cno -= len; if (LF_ISSET(TXT_APPENDEOL)) { tp->len -= len + tp->owrite + (tp->insert - 1); tp->insert = 1; } else { tp->len -= len + tp->owrite + tp->insert; tp->insert = 0; } tp->owrite = 0; /* * !!! * Delete any trailing whitespace from the current line. */ for (;; --p, --off) { if (!isblank(*p)) break; --tp->cno; --tp->len; if (off == tp->ai || off == tp->offset) break; } *didbreak = 1; return (0); } /* * txt_Rresolve -- * Resolve the input line for the 'R' command. */ static void txt_Rresolve(SCR *sp, TEXTH *tiqh, TEXT *tp, const size_t orig_len) { TEXT *ttp; size_t input_len, retain; char *p; /* * Check to make sure that the cursor hasn't moved beyond * the end of the line. */ if (tp->owrite == 0) return; /* * Calculate how many characters the user has entered, * plus the blanks erased by <carriage-return>/<newline>s. */ input_len = 0; TAILQ_FOREACH(ttp, tiqh, q) { input_len += ttp == tp ? tp->cno : ttp->len + ttp->R_erase; } /* * If the user has entered less characters than the original line * was long, restore any overwritable characters to the original * characters. These characters are entered as "insert characters", * because they're after the cursor and we don't want to lose them. * (This is okay because the R command has no insert characters.) * We set owrite to 0 so that the insert characters don't get copied * to somewhere else, which means that the line and the length have * to be adjusted here as well. * * We have to retrieve the original line because the original pinned * page has long since been discarded. If it doesn't exist, that's * okay, the user just extended the file. */ if (input_len < orig_len) { retain = MINIMUM(tp->owrite, orig_len - input_len); if (db_get(sp, TAILQ_FIRST(tiqh)->lno, DBG_FATAL | DBG_NOCACHE, &p, NULL)) return; memcpy(tp->lb + tp->cno, p + input_len, retain); tp->len -= tp->owrite - retain; tp->owrite = 0; tp->insert += retain; } } /* * txt_nomorech -- * No more characters message. */ static void txt_nomorech(SCR *sp) { msgq(sp, M_BERR, "No more characters to erase"); }
