diff options
Diffstat (limited to '1.2-netsec/editline/refresh.c')
| -rw-r--r-- | 1.2-netsec/editline/refresh.c | 1104 |
1 files changed, 0 insertions, 1104 deletions
diff --git a/1.2-netsec/editline/refresh.c b/1.2-netsec/editline/refresh.c deleted file mode 100644 index 935117741..000000000 --- a/1.2-netsec/editline/refresh.c +++ /dev/null @@ -1,1104 +0,0 @@ -/* $NetBSD: refresh.c,v 1.18 2002/03/18 16:00:58 christos Exp $ */ - -/*- - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Christos Zoulas of Cornell University. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include "config.h" -#if !defined(lint) && !defined(SCCSID) -#if 0 -static char sccsid[] = "@(#)refresh.c 8.1 (Berkeley) 6/4/93"; -#else -__RCSID("$NetBSD: refresh.c,v 1.18 2002/03/18 16:00:58 christos Exp $"); -#endif -#endif /* not lint && not SCCSID */ - -/* - * refresh.c: Lower level screen refreshing functions - */ -#include <stdio.h> -#include <ctype.h> -#include <unistd.h> -#include <string.h> - -#include "el.h" - -private void re_addc(EditLine *, int); -private void re_update_line(EditLine *, char *, char *, int); -private void re_insert (EditLine *, char *, int, int, char *, int); -private void re_delete(EditLine *, char *, int, int, int); -private void re_fastputc(EditLine *, int); -private void re__strncopy(char *, char *, size_t); -private void re__copy_and_pad(char *, const char *, size_t); - -#ifdef DEBUG_REFRESH -private void re_printstr(EditLine *, char *, char *, char *); -#define __F el->el_errfile -#define ELRE_ASSERT(a, b, c) do \ - if (a) { \ - (void) fprintf b; \ - c; \ - } \ - while (0) -#define ELRE_DEBUG(a, b) ELRE_ASSERT(a,b,;) - -/* re_printstr(): - * Print a string on the debugging pty - */ -private void -re_printstr(EditLine *el, char *str, char *f, char *t) -{ - - ELRE_DEBUG(1, (__F, "%s:\"", str)); - while (f < t) - ELRE_DEBUG(1, (__F, "%c", *f++ & 0177)); - ELRE_DEBUG(1, (__F, "\"\r\n")); -} -#else -#define ELRE_ASSERT(a, b, c) -#define ELRE_DEBUG(a, b) -#endif - - -/* re_addc(): - * Draw c, expanding tabs, control chars etc. - */ -private void -re_addc(EditLine *el, int c) -{ - - if (isprint(c)) { - re_putc(el, c, 1); - return; - } - if (c == '\n') { /* expand the newline */ - int oldv = el->el_refresh.r_cursor.v; - re_putc(el, '\0', 0); /* assure end of line */ - if (oldv == el->el_refresh.r_cursor.v) { /* XXX */ - el->el_refresh.r_cursor.h = 0; /* reset cursor pos */ - el->el_refresh.r_cursor.v++; - } - return; - } - if (c == '\t') { /* expand the tab */ - for (;;) { - re_putc(el, ' ', 1); - if ((el->el_refresh.r_cursor.h & 07) == 0) - break; /* go until tab stop */ - } - } else if (iscntrl(c)) { - re_putc(el, '^', 1); - if (c == '\177') - re_putc(el, '?', 1); - else - /* uncontrolify it; works only for iso8859-1 like sets */ - re_putc(el, (c | 0100), 1); - } else { - re_putc(el, '\\', 1); - re_putc(el, (int) ((((unsigned int) c >> 6) & 07) + '0'), 1); - re_putc(el, (int) ((((unsigned int) c >> 3) & 07) + '0'), 1); - re_putc(el, (c & 07) + '0', 1); - } -} - - -/* re_putc(): - * Draw the character given - */ -protected void -re_putc(EditLine *el, int c, int shift) -{ - - ELRE_DEBUG(1, (__F, "printing %3.3o '%c'\r\n", c, c)); - - el->el_vdisplay[el->el_refresh.r_cursor.v][el->el_refresh.r_cursor.h] = c; - if (!shift) - return; - - el->el_refresh.r_cursor.h++; /* advance to next place */ - if (el->el_refresh.r_cursor.h >= el->el_term.t_size.h) { - el->el_vdisplay[el->el_refresh.r_cursor.v][el->el_term.t_size.h] = '\0'; - /* assure end of line */ - el->el_refresh.r_cursor.h = 0; /* reset it. */ - - /* - * If we would overflow (input is longer than terminal size), - * emulate scroll by dropping first line and shuffling the rest. - * We do this via pointer shuffling - it's safe in this case - * and we avoid memcpy(). - */ - if (el->el_refresh.r_cursor.v + 1 >= el->el_term.t_size.v) { - int i, lins = el->el_term.t_size.v; - char *firstline = el->el_vdisplay[0]; - - for(i=1; i < lins; i++) - el->el_vdisplay[i-1] = el->el_vdisplay[i]; - - firstline[0] = '\0'; /* empty the string */ - el->el_vdisplay[i-1] = firstline; - } else - el->el_refresh.r_cursor.v++; - - ELRE_ASSERT(el->el_refresh.r_cursor.v >= el->el_term.t_size.v, - (__F, "\r\nre_putc: overflow! r_cursor.v == %d > %d\r\n", - el->el_refresh.r_cursor.v, el->el_term.t_size.v), - abort()); - } -} - - -/* re_refresh(): - * draws the new virtual screen image from the current input - * line, then goes line-by-line changing the real image to the new - * virtual image. The routine to re-draw a line can be replaced - * easily in hopes of a smarter one being placed there. - */ -protected void -re_refresh(EditLine *el) -{ - int i, rhdiff; - char *cp, *st; - coord_t cur; -#ifdef notyet - size_t termsz; -#endif - - ELRE_DEBUG(1, (__F, "el->el_line.buffer = :%s:\r\n", - el->el_line.buffer)); - - /* reset the Drawing cursor */ - el->el_refresh.r_cursor.h = 0; - el->el_refresh.r_cursor.v = 0; - - /* temporarily draw rprompt to calculate its size */ - prompt_print(el, EL_RPROMPT); - - /* reset the Drawing cursor */ - el->el_refresh.r_cursor.h = 0; - el->el_refresh.r_cursor.v = 0; - - cur.h = -1; /* set flag in case I'm not set */ - cur.v = 0; - - prompt_print(el, EL_PROMPT); - - /* draw the current input buffer */ -#if notyet - termsz = el->el_term.t_size.h * el->el_term.t_size.v; - if (el->el_line.lastchar - el->el_line.buffer > termsz) { - /* - * If line is longer than terminal, process only part - * of line which would influence display. - */ - size_t rem = (el->el_line.lastchar-el->el_line.buffer)%termsz; - - st = el->el_line.lastchar - rem - - (termsz - (((rem / el->el_term.t_size.v) - 1) - * el->el_term.t_size.v)); - } else -#endif - st = el->el_line.buffer; - - for (cp = st; cp < el->el_line.lastchar; cp++) { - if (cp == el->el_line.cursor) { - /* save for later */ - cur.h = el->el_refresh.r_cursor.h; - cur.v = el->el_refresh.r_cursor.v; - } - re_addc(el, (unsigned char) *cp); - } - - if (cur.h == -1) { /* if I haven't been set yet, I'm at the end */ - cur.h = el->el_refresh.r_cursor.h; - cur.v = el->el_refresh.r_cursor.v; - } - rhdiff = el->el_term.t_size.h - el->el_refresh.r_cursor.h - - el->el_rprompt.p_pos.h; - if (el->el_rprompt.p_pos.h && !el->el_rprompt.p_pos.v && - !el->el_refresh.r_cursor.v && rhdiff > 1) { - /* - * have a right-hand side prompt that will fit - * on the end of the first line with at least - * one character gap to the input buffer. - */ - while (--rhdiff > 0) /* pad out with spaces */ - re_putc(el, ' ', 1); - prompt_print(el, EL_RPROMPT); - } else { - el->el_rprompt.p_pos.h = 0; /* flag "not using rprompt" */ - el->el_rprompt.p_pos.v = 0; - } - - re_putc(el, '\0', 0); /* make line ended with NUL, no cursor shift */ - - el->el_refresh.r_newcv = el->el_refresh.r_cursor.v; - - ELRE_DEBUG(1, (__F, - "term.h=%d vcur.h=%d vcur.v=%d vdisplay[0]=\r\n:%80.80s:\r\n", - el->el_term.t_size.h, el->el_refresh.r_cursor.h, - el->el_refresh.r_cursor.v, el->el_vdisplay[0])); - - ELRE_DEBUG(1, (__F, "updating %d lines.\r\n", el->el_refresh.r_newcv)); - for (i = 0; i <= el->el_refresh.r_newcv; i++) { - /* NOTE THAT re_update_line MAY CHANGE el_display[i] */ - re_update_line(el, el->el_display[i], el->el_vdisplay[i], i); - - /* - * Copy the new line to be the current one, and pad out with - * spaces to the full width of the terminal so that if we try - * moving the cursor by writing the character that is at the - * end of the screen line, it won't be a NUL or some old - * leftover stuff. - */ - re__copy_and_pad(el->el_display[i], el->el_vdisplay[i], - (size_t) el->el_term.t_size.h); - } - ELRE_DEBUG(1, (__F, - "\r\nel->el_refresh.r_cursor.v=%d,el->el_refresh.r_oldcv=%d i=%d\r\n", - el->el_refresh.r_cursor.v, el->el_refresh.r_oldcv, i)); - - if (el->el_refresh.r_oldcv > el->el_refresh.r_newcv) - for (; i <= el->el_refresh.r_oldcv; i++) { - term_move_to_line(el, i); - term_move_to_char(el, 0); - term_clear_EOL(el, (int) strlen(el->el_display[i])); -#ifdef DEBUG_REFRESH - term_overwrite(el, "C\b", 2); -#endif /* DEBUG_REFRESH */ - el->el_display[i][0] = '\0'; - } - - el->el_refresh.r_oldcv = el->el_refresh.r_newcv; /* set for next time */ - ELRE_DEBUG(1, (__F, - "\r\ncursor.h = %d, cursor.v = %d, cur.h = %d, cur.v = %d\r\n", - el->el_refresh.r_cursor.h, el->el_refresh.r_cursor.v, - cur.h, cur.v)); - term_move_to_line(el, cur.v); /* go to where the cursor is */ - term_move_to_char(el, cur.h); -} - - -/* re_goto_bottom(): - * used to go to last used screen line - */ -protected void -re_goto_bottom(EditLine *el) -{ - - term_move_to_line(el, el->el_refresh.r_oldcv); - term__putc('\r'); - term__putc('\n'); - re_clear_display(el); - term__flush(); -} - - -/* re_insert(): - * insert num characters of s into d (in front of the character) - * at dat, maximum length of d is dlen - */ -private void -/*ARGSUSED*/ -re_insert(EditLine *el, char *d, int dat, int dlen, char *s, int num) -{ - char *a, *b; - - if (num <= 0) - return; - if (num > dlen - dat) - num = dlen - dat; - - ELRE_DEBUG(1, - (__F, "re_insert() starting: %d at %d max %d, d == \"%s\"\n", - num, dat, dlen, d)); - ELRE_DEBUG(1, (__F, "s == \"%s\"n", s)); - - /* open up the space for num chars */ - if (num > 0) { - b = d + dlen - 1; - a = b - num; - while (a >= &d[dat]) - *b-- = *a--; - d[dlen] = '\0'; /* just in case */ - } - ELRE_DEBUG(1, (__F, - "re_insert() after insert: %d at %d max %d, d == \"%s\"\n", - num, dat, dlen, d)); - ELRE_DEBUG(1, (__F, "s == \"%s\"n", s)); - - /* copy the characters */ - for (a = d + dat; (a < d + dlen) && (num > 0); num--) - *a++ = *s++; - - ELRE_DEBUG(1, - (__F, "re_insert() after copy: %d at %d max %d, %s == \"%s\"\n", - num, dat, dlen, d, s)); - ELRE_DEBUG(1, (__F, "s == \"%s\"n", s)); -} - - -/* re_delete(): - * delete num characters d at dat, maximum length of d is dlen - */ -private void -/*ARGSUSED*/ -re_delete(EditLine *el, char *d, int dat, int dlen, int num) -{ - char *a, *b; - - if (num <= 0) - return; - if (dat + num >= dlen) { - d[dat] = '\0'; - return; - } - ELRE_DEBUG(1, - (__F, "re_delete() starting: %d at %d max %d, d == \"%s\"\n", - num, dat, dlen, d)); - - /* open up the space for num chars */ - if (num > 0) { - b = d + dat; - a = b + num; - while (a < &d[dlen]) - *b++ = *a++; - d[dlen] = '\0'; /* just in case */ - } - ELRE_DEBUG(1, - (__F, "re_delete() after delete: %d at %d max %d, d == \"%s\"\n", - num, dat, dlen, d)); -} - - -/* re__strncopy(): - * Like strncpy without padding. - */ -private void -re__strncopy(char *a, char *b, size_t n) -{ - - while (n-- && *b) - *a++ = *b++; -} - - -/***************************************************************** - re_update_line() is based on finding the middle difference of each line - on the screen; vis: - - /old first difference - /beginning of line | /old last same /old EOL - v v v v -old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as -new: eddie> Oh, my little buggy says to me, as lurgid as - ^ ^ ^ ^ - \beginning of line | \new last same \new end of line - \new first difference - - all are character pointers for the sake of speed. Special cases for - no differences, as well as for end of line additions must be handled. -**************************************************************** */ - -/* Minimum at which doing an insert it "worth it". This should be about - * half the "cost" of going into insert mode, inserting a character, and - * going back out. This should really be calculated from the termcap - * data... For the moment, a good number for ANSI terminals. - */ -#define MIN_END_KEEP 4 - -private void -re_update_line(EditLine *el, char *old, char *new, int i) -{ - char *o, *n, *p, c; - char *ofd, *ols, *oe, *nfd, *nls, *ne; - char *osb, *ose, *nsb, *nse; - int fx, sx; - - /* - * find first diff - */ - for (o = old, n = new; *o && (*o == *n); o++, n++) - continue; - ofd = o; - nfd = n; - - /* - * Find the end of both old and new - */ - while (*o) - o++; - /* - * Remove any trailing blanks off of the end, being careful not to - * back up past the beginning. - */ - while (ofd < o) { - if (o[-1] != ' ') - break; - o--; - } - oe = o; - *oe = '\0'; - - while (*n) - n++; - - /* remove blanks from end of new */ - while (nfd < n) { - if (n[-1] != ' ') - break; - n--; - } - ne = n; - *ne = '\0'; - - /* - * if no diff, continue to next line of redraw - */ - if (*ofd == '\0' && *nfd == '\0') { - ELRE_DEBUG(1, (__F, "no difference.\r\n")); - return; - } - /* - * find last same pointer - */ - while ((o > ofd) && (n > nfd) && (*--o == *--n)) - continue; - ols = ++o; - nls = ++n; - - /* - * find same begining and same end - */ - osb = ols; - nsb = nls; - ose = ols; - nse = nls; - - /* - * case 1: insert: scan from nfd to nls looking for *ofd - */ - if (*ofd) { - for (c = *ofd, n = nfd; n < nls; n++) { - if (c == *n) { - for (o = ofd, p = n; - p < nls && o < ols && *o == *p; - o++, p++) - continue; - /* - * if the new match is longer and it's worth - * keeping, then we take it - */ - if (((nse - nsb) < (p - n)) && - (2 * (p - n) > n - nfd)) { - nsb = n; - nse = p; - osb = ofd; - ose = o; - } - } - } - } - /* - * case 2: delete: scan from ofd to ols looking for *nfd - */ - if (*nfd) { - for (c = *nfd, o = ofd; o < ols; o++) { - if (c == *o) { - for (n = nfd, p = o; - p < ols && n < nls && *p == *n; - p++, n++) - continue; - /* - * if the new match is longer and it's worth - * keeping, then we take it - */ - if (((ose - osb) < (p - o)) && - (2 * (p - o) > o - ofd)) { - nsb = nfd; - nse = n; - osb = o; - ose = p; - } - } - } - } - /* - * Pragmatics I: If old trailing whitespace or not enough characters to - * save to be worth it, then don't save the last same info. - */ - if ((oe - ols) < MIN_END_KEEP) { - ols = oe; - nls = ne; - } - /* - * Pragmatics II: if the terminal isn't smart enough, make the data - * dumber so the smart update doesn't try anything fancy - */ - - /* - * fx is the number of characters we need to insert/delete: in the - * beginning to bring the two same begins together - */ - fx = (nsb - nfd) - (osb - ofd); - /* - * sx is the number of characters we need to insert/delete: in the - * end to bring the two same last parts together - */ - sx = (nls - nse) - (ols - ose); - - if (!EL_CAN_INSERT) { - if (fx > 0) { - osb = ols; - ose = ols; - nsb = nls; - nse = nls; - } - if (sx > 0) { - ols = oe; - nls = ne; - } - if ((ols - ofd) < (nls - nfd)) { - ols = oe; - nls = ne; - } - } - if (!EL_CAN_DELETE) { - if (fx < 0) { - osb = ols; - ose = ols; - nsb = nls; - nse = nls; - } - if (sx < 0) { - ols = oe; - nls = ne; - } - if ((ols - ofd) > (nls - nfd)) { - ols = oe; - nls = ne; - } - } - /* - * Pragmatics III: make sure the middle shifted pointers are correct if - * they don't point to anything (we may have moved ols or nls). - */ - /* if the change isn't worth it, don't bother */ - /* was: if (osb == ose) */ - if ((ose - osb) < MIN_END_KEEP) { - osb = ols; - ose = ols; - nsb = nls; - nse = nls; - } - /* - * Now that we are done with pragmatics we recompute fx, sx - */ - fx = (nsb - nfd) - (osb - ofd); - sx = (nls - nse) - (ols - ose); - - ELRE_DEBUG(1, (__F, "\n")); - ELRE_DEBUG(1, (__F, "ofd %d, osb %d, ose %d, ols %d, oe %d\n", - ofd - old, osb - old, ose - old, ols - old, oe - old)); - ELRE_DEBUG(1, (__F, "nfd %d, nsb %d, nse %d, nls %d, ne %d\n", - nfd - new, nsb - new, nse - new, nls - new, ne - new)); - ELRE_DEBUG(1, (__F, - "xxx-xxx:\"00000000001111111111222222222233333333334\"\r\n")); - ELRE_DEBUG(1, (__F, - "xxx-xxx:\"01234567890123456789012345678901234567890\"\r\n")); -#ifdef DEBUG_REFRESH - re_printstr(el, "old- oe", old, oe); - re_printstr(el, "new- ne", new, ne); - re_printstr(el, "old-ofd", old, ofd); - re_printstr(el, "new-nfd", new, nfd); - re_printstr(el, "ofd-osb", ofd, osb); - re_printstr(el, "nfd-nsb", nfd, nsb); - re_printstr(el, "osb-ose", osb, ose); - re_printstr(el, "nsb-nse", nsb, nse); - re_printstr(el, "ose-ols", ose, ols); - re_printstr(el, "nse-nls", nse, nls); - re_printstr(el, "ols- oe", ols, oe); - re_printstr(el, "nls- ne", nls, ne); -#endif /* DEBUG_REFRESH */ - - /* - * el_cursor.v to this line i MUST be in this routine so that if we - * don't have to change the line, we don't move to it. el_cursor.h to - * first diff char - */ - term_move_to_line(el, i); - - /* - * at this point we have something like this: - * - * /old /ofd /osb /ose /ols /oe - * v.....................v v..................v v........v - * eddie> Oh, my fredded gruntle-buggy is to me, as foo var lurgid as - * eddie> Oh, my fredded quiux buggy is to me, as gruntle-lurgid as - * ^.....................^ ^..................^ ^........^ - * \new \nfd \nsb \nse \nls \ne - * - * fx is the difference in length between the chars between nfd and - * nsb, and the chars between ofd and osb, and is thus the number of - * characters to delete if < 0 (new is shorter than old, as above), - * or insert (new is longer than short). - * - * sx is the same for the second differences. - */ - - /* - * if we have a net insert on the first difference, AND inserting the - * net amount ((nsb-nfd) - (osb-ofd)) won't push the last useful - * character (which is ne if nls != ne, otherwise is nse) off the edge - * of the screen (el->el_term.t_size.h) else we do the deletes first - * so that we keep everything we need to. - */ - - /* - * if the last same is the same like the end, there is no last same - * part, otherwise we want to keep the last same part set p to the - * last useful old character - */ - p = (ols != oe) ? oe : ose; - - /* - * if (There is a diffence in the beginning) && (we need to insert - * characters) && (the number of characters to insert is less than - * the term width) - * We need to do an insert! - * else if (we need to delete characters) - * We need to delete characters! - * else - * No insert or delete - */ - if ((nsb != nfd) && fx > 0 && - ((p - old) + fx <= el->el_term.t_size.h)) { - ELRE_DEBUG(1, - (__F, "first diff insert at %d...\r\n", nfd - new)); - /* - * Move to the first char to insert, where the first diff is. - */ - term_move_to_char(el, nfd - new); - /* - * Check if we have stuff to keep at end - */ - if (nsb != ne) { - ELRE_DEBUG(1, (__F, "with stuff to keep at end\r\n")); - /* - * insert fx chars of new starting at nfd - */ - if (fx > 0) { - ELRE_DEBUG(!EL_CAN_INSERT, (__F, - "ERROR: cannot insert in early first diff\n")); - term_insertwrite(el, nfd, fx); - re_insert(el, old, ofd - old, - el->el_term.t_size.h, nfd, fx); - } - /* - * write (nsb-nfd) - fx chars of new starting at - * (nfd + fx) - */ - term_overwrite(el, nfd + fx, (nsb - nfd) - fx); - re__strncopy(ofd + fx, nfd + fx, - (size_t) ((nsb - nfd) - fx)); - } else { - ELRE_DEBUG(1, (__F, "without anything to save\r\n")); - term_overwrite(el, nfd, (nsb - nfd)); - re__strncopy(ofd, nfd, (size_t) (nsb - nfd)); - /* - * Done - */ - return; - } - } else if (fx < 0) { - ELRE_DEBUG(1, - (__F, "first diff delete at %d...\r\n", ofd - old)); - /* - * move to the first char to delete where the first diff is - */ - term_move_to_char(el, ofd - old); - /* - * Check if we have stuff to save - */ - if (osb != oe) { - ELRE_DEBUG(1, (__F, "with stuff to save at end\r\n")); - /* - * fx is less than zero *always* here but we check - * for code symmetry - */ - if (fx < 0) { - ELRE_DEBUG(!EL_CAN_DELETE, (__F, - "ERROR: cannot delete in first diff\n")); - term_deletechars(el, -fx); - re_delete(el, old, ofd - old, - el->el_term.t_size.h, -fx); - } - /* - * write (nsb-nfd) chars of new starting at nfd - */ - term_overwrite(el, nfd, (nsb - nfd)); - re__strncopy(ofd, nfd, (size_t) (nsb - nfd)); - - } else { - ELRE_DEBUG(1, (__F, - "but with nothing left to save\r\n")); - /* - * write (nsb-nfd) chars of new starting at nfd - */ - term_overwrite(el, nfd, (nsb - nfd)); - ELRE_DEBUG(1, (__F, - "cleareol %d\n", (oe - old) - (ne - new))); - term_clear_EOL(el, (oe - old) - (ne - new)); - /* - * Done - */ - return; - } - } else - fx = 0; - - if (sx < 0 && (ose - old) + fx < el->el_term.t_size.h) { - ELRE_DEBUG(1, (__F, - "second diff delete at %d...\r\n", (ose - old) + fx)); - /* - * Check if we have stuff to delete - */ - /* - * fx is the number of characters inserted (+) or deleted (-) - */ - - term_move_to_char(el, (ose - old) + fx); - /* - * Check if we have stuff to save - */ - if (ols != oe) { - ELRE_DEBUG(1, (__F, "with stuff to save at end\r\n")); - /* - * Again a duplicate test. - */ - if (sx < 0) { - ELRE_DEBUG(!EL_CAN_DELETE, (__F, - "ERROR: cannot delete in second diff\n")); - term_deletechars(el, -sx); - } - /* - * write (nls-nse) chars of new starting at nse - */ - term_overwrite(el, nse, (nls - nse)); - } else { - ELRE_DEBUG(1, (__F, - "but with nothing left to save\r\n")); - term_overwrite(el, nse, (nls - nse)); - ELRE_DEBUG(1, (__F, - "cleareol %d\n", (oe - old) - (ne - new))); - if ((oe - old) - (ne - new) != 0) - term_clear_EOL(el, (oe - old) - (ne - new)); - } - } - /* - * if we have a first insert AND WE HAVEN'T ALREADY DONE IT... - */ - if ((nsb != nfd) && (osb - ofd) <= (nsb - nfd) && (fx == 0)) { - ELRE_DEBUG(1, (__F, "late first diff insert at %d...\r\n", - nfd - new)); - - term_move_to_char(el, nfd - new); - /* - * Check if we have stuff to keep at the end - */ - if (nsb != ne) { - ELRE_DEBUG(1, (__F, "with stuff to keep at end\r\n")); - /* - * We have to recalculate fx here because we set it - * to zero above as a flag saying that we hadn't done - * an early first insert. - */ - fx = (nsb - nfd) - (osb - ofd); - if (fx > 0) { - /* - * insert fx chars of new starting at nfd - */ - ELRE_DEBUG(!EL_CAN_INSERT, (__F, - "ERROR: cannot insert in late first diff\n")); - term_insertwrite(el, nfd, fx); - re_insert(el, old, ofd - old, - el->el_term.t_size.h, nfd, fx); - } - /* - * write (nsb-nfd) - fx chars of new starting at - * (nfd + fx) - */ - term_overwrite(el, nfd + fx, (nsb - nfd) - fx); - re__strncopy(ofd + fx, nfd + fx, - (size_t) ((nsb - nfd) - fx)); - } else { - ELRE_DEBUG(1, (__F, "without anything to save\r\n")); - term_overwrite(el, nfd, (nsb - nfd)); - re__strncopy(ofd, nfd, (size_t) (nsb - nfd)); - } - } - /* - * line is now NEW up to nse - */ - if (sx >= 0) { - ELRE_DEBUG(1, (__F, - "second diff insert at %d...\r\n", nse - new)); - term_move_to_char(el, nse - new); - if (ols != oe) { - ELRE_DEBUG(1, (__F, "with stuff to keep at end\r\n")); - if (sx > 0) { - /* insert sx chars of new starting at nse */ - ELRE_DEBUG(!EL_CAN_INSERT, (__F, - "ERROR: cannot insert in second diff\n")); - term_insertwrite(el, nse, sx); - } - /* - * write (nls-nse) - sx chars of new starting at - * (nse + sx) - */ - term_overwrite(el, nse + sx, (nls - nse) - sx); - } else { - ELRE_DEBUG(1, (__F, "without anything to save\r\n")); - term_overwrite(el, nse, (nls - nse)); - - /* - * No need to do a clear-to-end here because we were - * doing a second insert, so we will have over - * written all of the old string. - */ - } - } - ELRE_DEBUG(1, (__F, "done.\r\n")); -} - - -/* re__copy_and_pad(): - * Copy string and pad with spaces - */ -private void -re__copy_and_pad(char *dst, const char *src, size_t width) -{ - int i; - - for (i = 0; i < width; i++) { - if (*src == '\0') - break; - *dst++ = *src++; - } - - for (; i < width; i++) - *dst++ = ' '; - - *dst = '\0'; -} - - -/* re_refresh_cursor(): - * Move to the new cursor position - */ -protected void -re_refresh_cursor(EditLine *el) -{ - char *cp, c; - int h, v, th; - - /* first we must find where the cursor is... */ - h = el->el_prompt.p_pos.h; - v = el->el_prompt.p_pos.v; - th = el->el_term.t_size.h; /* optimize for speed */ - - /* do input buffer to el->el_line.cursor */ - for (cp = el->el_line.buffer; cp < el->el_line.cursor; cp++) { - c = *cp; - h++; /* all chars at least this long */ - - if (c == '\n') {/* handle newline in data part too */ - h = 0; - v++; - } else { - if (c == '\t') { /* if a tab, to next tab stop */ - while (h & 07) { - h++; - } - } else if (iscntrl((unsigned char) c)) { - /* if control char */ - h++; - if (h > th) { /* if overflow, compensate */ - h = 1; - v++; - } - } else if (!isprint((unsigned char) c)) { - h += 3; - if (h > th) { /* if overflow, compensate */ - h = h - th; - v++; - } - } - } - - if (h >= th) { /* check, extra long tabs picked up here also */ - h = 0; - v++; - } - } - - /* now go there */ - term_move_to_line(el, v); - term_move_to_char(el, h); - term__flush(); -} - - -/* re_fastputc(): - * Add a character fast. - */ -private void -re_fastputc(EditLine *el, int c) -{ - - term__putc(c); - el->el_display[el->el_cursor.v][el->el_cursor.h++] = c; - if (el->el_cursor.h >= el->el_term.t_size.h) { - /* if we must overflow */ - el->el_cursor.h = 0; - - /* - * If we would overflow (input is longer than terminal size), - * emulate scroll by dropping first line and shuffling the rest. - * We do this via pointer shuffling - it's safe in this case - * and we avoid memcpy(). - */ - if (el->el_cursor.v + 1 >= el->el_term.t_size.v) { - int i, lins = el->el_term.t_size.v; - char *firstline = el->el_display[0]; - - for(i=1; i < lins; i++) - el->el_display[i-1] = el->el_display[i]; - - re__copy_and_pad(firstline, "", 0); - el->el_display[i-1] = firstline; - } else { - el->el_cursor.v++; - el->el_refresh.r_oldcv++; - } - if (EL_HAS_AUTO_MARGINS) { - if (EL_HAS_MAGIC_MARGINS) { - term__putc(' '); - term__putc('\b'); - } - } else { - term__putc('\r'); - term__putc('\n'); - } - } -} - - -/* re_fastaddc(): - * we added just one char, handle it fast. - * Assumes that screen cursor == real cursor - */ -protected void -re_fastaddc(EditLine *el) -{ - char c; - int rhdiff; - - c = el->el_line.cursor[-1]; - - if (c == '\t' || el->el_line.cursor != el->el_line.lastchar) { - re_refresh(el); /* too hard to handle */ - return; - } - rhdiff = el->el_term.t_size.h - el->el_cursor.h - - el->el_rprompt.p_pos.h; - if (el->el_rprompt.p_pos.h && rhdiff < 3) { - re_refresh(el); /* clear out rprompt if less than 1 char gap */ - return; - } /* else (only do at end of line, no TAB) */ - if (iscntrl((unsigned char) c)) { /* if control char, do caret */ - char mc = (c == '\177') ? '?' : (c | 0100); - re_fastputc(el, '^'); - re_fastputc(el, mc); - } else if (isprint((unsigned char) c)) { /* normal char */ - re_fastputc(el, c); - } else { - re_fastputc(el, '\\'); - re_fastputc(el, (int) ((((unsigned int) c >> 6) & 7) + '0')); - re_fastputc(el, (int) ((((unsigned int) c >> 3) & 7) + '0')); - re_fastputc(el, (c & 7) + '0'); - } - term__flush(); -} - - -/* re_clear_display(): - * clear the screen buffers so that new new prompt starts fresh. - */ -protected void -re_clear_display(EditLine *el) -{ - int i; - - el->el_cursor.v = 0; - el->el_cursor.h = 0; - for (i = 0; i < el->el_term.t_size.v; i++) - el->el_display[i][0] = '\0'; - el->el_refresh.r_oldcv = 0; -} - - -/* re_clear_lines(): - * Make sure all lines are *really* blank - */ -protected void -re_clear_lines(EditLine *el) -{ - - if (EL_CAN_CEOL) { - int i; - term_move_to_char(el, 0); - for (i = 0; i <= el->el_refresh.r_oldcv; i++) { - /* for each line on the screen */ - term_move_to_line(el, i); - term_clear_EOL(el, el->el_term.t_size.h); - } - term_move_to_line(el, 0); - } else { - term_move_to_line(el, el->el_refresh.r_oldcv); - /* go to last line */ - term__putc('\r'); /* go to BOL */ - term__putc('\n'); /* go to new line */ - } -} |