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1104 lines
29 KiB
C
1104 lines
29 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Christos Zoulas of Cornell University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $NetBSD: refresh.c,v 1.16 2001/01/10 07:45:42 jdolecek Exp $
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*/
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#if !defined(lint) && !defined(SCCSID)
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static char sccsid[] = "@(#)refresh.c 8.1 (Berkeley) 6/4/93";
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#endif /* not lint && not SCCSID */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* refresh.c: Lower level screen refreshing functions
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*/
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#include "sys.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include "el.h"
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private void re_addc(EditLine *, int);
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private void re_update_line(EditLine *, char *, char *, int);
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private void re_insert (EditLine *, char *, int, int, char *, int);
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private void re_delete(EditLine *, char *, int, int, int);
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private void re_fastputc(EditLine *, int);
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private void re__strncopy(char *, char *, size_t);
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private void re__copy_and_pad(char *, char *, size_t);
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#ifdef DEBUG_REFRESH
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private void re_printstr(EditLine *, char *, char *, char *);
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#define __F el->el_errfile
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#define ELRE_ASSERT(a, b, c) do \
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if (a) { \
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(void) fprintf b; \
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c; \
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} \
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while (0)
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#define ELRE_DEBUG(a, b) ELRE_ASSERT(a,b,;)
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/* re_printstr():
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* Print a string on the debugging pty
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*/
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private void
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re_printstr(EditLine *el, char *str, char *f, char *t)
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{
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ELRE_DEBUG(1, (__F, "%s:\"", str));
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while (f < t)
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ELRE_DEBUG(1, (__F, "%c", *f++ & 0177));
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ELRE_DEBUG(1, (__F, "\"\r\n"));
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}
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#else
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#define ELRE_ASSERT(a, b, c)
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#define ELRE_DEBUG(a, b)
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#endif
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/* re_addc():
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* Draw c, expanding tabs, control chars etc.
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*/
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private void
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re_addc(EditLine *el, int c)
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{
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c = (unsigned char)c;
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if (isprint(c)) {
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re_putc(el, c, 1);
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return;
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}
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if (c == '\n') { /* expand the newline */
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int oldv = el->el_refresh.r_cursor.v;
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re_putc(el, '\0', 0); /* assure end of line */
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if (oldv == el->el_refresh.r_cursor.v) { /* XXX */
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el->el_refresh.r_cursor.h = 0; /* reset cursor pos */
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el->el_refresh.r_cursor.v++;
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}
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return;
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}
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if (c == '\t') { /* expand the tab */
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for (;;) {
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re_putc(el, ' ', 1);
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if ((el->el_refresh.r_cursor.h & 07) == 0)
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break; /* go until tab stop */
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}
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} else if (iscntrl(c)) {
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re_putc(el, '^', 1);
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if (c == 0177)
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re_putc(el, '?', 1);
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else
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/* uncontrolify it; works only for iso8859-1 like sets */
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re_putc(el, (toascii(c) | 0100), 1);
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} else {
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re_putc(el, '\\', 1);
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re_putc(el, (int) ((((unsigned int) c >> 6) & 07) + '0'), 1);
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re_putc(el, (int) ((((unsigned int) c >> 3) & 07) + '0'), 1);
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re_putc(el, (c & 07) + '0', 1);
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}
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}
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/* re_putc():
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* Draw the character given
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*/
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protected void
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re_putc(EditLine *el, int c, int shift)
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{
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ELRE_DEBUG(1, (__F, "printing %3.3o '%c'\r\n", c, c));
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el->el_vdisplay[el->el_refresh.r_cursor.v][el->el_refresh.r_cursor.h] = c;
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if (!shift)
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return;
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el->el_refresh.r_cursor.h++; /* advance to next place */
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if (el->el_refresh.r_cursor.h >= el->el_term.t_size.h) {
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el->el_vdisplay[el->el_refresh.r_cursor.v][el->el_term.t_size.h] = '\0';
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/* assure end of line */
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el->el_refresh.r_cursor.h = 0; /* reset it. */
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/*
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* If we would overflow (input is longer than terminal size),
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* emulate scroll by dropping first line and shuffling the rest.
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* We do this via pointer shuffling - it's safe in this case
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* and we avoid memcpy().
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*/
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if (el->el_refresh.r_cursor.v + 1 >= el->el_term.t_size.v) {
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int i, lins = el->el_term.t_size.v;
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char *firstline = el->el_vdisplay[0];
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for(i=1; i < lins; i++)
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el->el_vdisplay[i-1] = el->el_vdisplay[i];
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firstline[0] = '\0'; /* empty the string */
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el->el_vdisplay[i-1] = firstline;
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} else
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el->el_refresh.r_cursor.v++;
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ELRE_ASSERT(el->el_refresh.r_cursor.v >= el->el_term.t_size.v,
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(__F, "\r\nre_putc: overflow! r_cursor.v == %d > %d\r\n",
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el->el_refresh.r_cursor.v, el->el_term.t_size.v),
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abort());
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}
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}
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/* re_refresh():
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* draws the new virtual screen image from the current input
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* line, then goes line-by-line changing the real image to the new
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* virtual image. The routine to re-draw a line can be replaced
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* easily in hopes of a smarter one being placed there.
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*/
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protected void
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re_refresh(EditLine *el)
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{
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int i, rhdiff;
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char *cp, *st;
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coord_t cur;
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#ifdef notyet
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size_t termsz;
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#endif
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ELRE_DEBUG(1, (__F, "el->el_line.buffer = :%s:\r\n",
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el->el_line.buffer));
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/* reset the Drawing cursor */
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el->el_refresh.r_cursor.h = 0;
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el->el_refresh.r_cursor.v = 0;
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/* temporarily draw rprompt to calculate its size */
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prompt_print(el, EL_RPROMPT);
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/* reset the Drawing cursor */
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el->el_refresh.r_cursor.h = 0;
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el->el_refresh.r_cursor.v = 0;
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cur.h = -1; /* set flag in case I'm not set */
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cur.v = 0;
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prompt_print(el, EL_PROMPT);
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/* draw the current input buffer */
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#if notyet
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termsz = el->el_term.t_size.h * el->el_term.t_size.v;
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if (el->el_line.lastchar - el->el_line.buffer > termsz) {
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/*
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* If line is longer than terminal, process only part
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* of line which would influence display.
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*/
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size_t rem = (el->el_line.lastchar-el->el_line.buffer)%termsz;
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st = el->el_line.lastchar - rem
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- (termsz - (((rem / el->el_term.t_size.v) - 1)
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* el->el_term.t_size.v));
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} else
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#endif
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st = el->el_line.buffer;
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for (cp = st; cp < el->el_line.lastchar; cp++) {
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if (cp == el->el_line.cursor) {
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/* save for later */
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cur.h = el->el_refresh.r_cursor.h;
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cur.v = el->el_refresh.r_cursor.v;
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}
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re_addc(el, (unsigned char) *cp);
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}
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if (cur.h == -1) { /* if I haven't been set yet, I'm at the end */
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cur.h = el->el_refresh.r_cursor.h;
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cur.v = el->el_refresh.r_cursor.v;
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}
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rhdiff = el->el_term.t_size.h - el->el_refresh.r_cursor.h -
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el->el_rprompt.p_pos.h;
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if (el->el_rprompt.p_pos.h && !el->el_rprompt.p_pos.v &&
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!el->el_refresh.r_cursor.v && rhdiff > 1) {
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/*
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* have a right-hand side prompt that will fit
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* on the end of the first line with at least
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* one character gap to the input buffer.
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*/
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while (--rhdiff > 0) /* pad out with spaces */
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re_putc(el, ' ', 1);
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prompt_print(el, EL_RPROMPT);
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} else {
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el->el_rprompt.p_pos.h = 0; /* flag "not using rprompt" */
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el->el_rprompt.p_pos.v = 0;
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}
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re_putc(el, '\0', 0); /* make line ended with NUL, no cursor shift */
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el->el_refresh.r_newcv = el->el_refresh.r_cursor.v;
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ELRE_DEBUG(1, (__F,
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"term.h=%d vcur.h=%d vcur.v=%d vdisplay[0]=\r\n:%80.80s:\r\n",
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el->el_term.t_size.h, el->el_refresh.r_cursor.h,
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el->el_refresh.r_cursor.v, el->el_vdisplay[0]));
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ELRE_DEBUG(1, (__F, "updating %d lines.\r\n", el->el_refresh.r_newcv));
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for (i = 0; i <= el->el_refresh.r_newcv; i++) {
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/* NOTE THAT re_update_line MAY CHANGE el_display[i] */
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re_update_line(el, el->el_display[i], el->el_vdisplay[i], i);
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/*
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* Copy the new line to be the current one, and pad out with
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* spaces to the full width of the terminal so that if we try
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* moving the cursor by writing the character that is at the
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* end of the screen line, it won't be a NUL or some old
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* leftover stuff.
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*/
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re__copy_and_pad(el->el_display[i], el->el_vdisplay[i],
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(size_t) el->el_term.t_size.h);
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}
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ELRE_DEBUG(1, (__F,
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"\r\nel->el_refresh.r_cursor.v=%d,el->el_refresh.r_oldcv=%d i=%d\r\n",
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el->el_refresh.r_cursor.v, el->el_refresh.r_oldcv, i));
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if (el->el_refresh.r_oldcv > el->el_refresh.r_newcv)
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for (; i <= el->el_refresh.r_oldcv; i++) {
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term_move_to_line(el, i);
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term_move_to_char(el, 0);
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term_clear_EOL(el, (int) strlen(el->el_display[i]));
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#ifdef DEBUG_REFRESH
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term_overwrite(el, "C\b", 2);
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#endif /* DEBUG_REFRESH */
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el->el_display[i][0] = '\0';
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}
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el->el_refresh.r_oldcv = el->el_refresh.r_newcv; /* set for next time */
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ELRE_DEBUG(1, (__F,
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"\r\ncursor.h = %d, cursor.v = %d, cur.h = %d, cur.v = %d\r\n",
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el->el_refresh.r_cursor.h, el->el_refresh.r_cursor.v,
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cur.h, cur.v));
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term_move_to_line(el, cur.v); /* go to where the cursor is */
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term_move_to_char(el, cur.h);
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}
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/* re_goto_bottom():
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* used to go to last used screen line
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*/
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protected void
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re_goto_bottom(EditLine *el)
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{
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term_move_to_line(el, el->el_refresh.r_oldcv);
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term__putc('\r');
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term__putc('\n');
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re_clear_display(el);
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term__flush();
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}
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/* re_insert():
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* insert num characters of s into d (in front of the character)
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* at dat, maximum length of d is dlen
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*/
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private void
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/*ARGSUSED*/
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re_insert(EditLine *el, char *d, int dat, int dlen, char *s, int num)
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{
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char *a, *b;
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if (num <= 0)
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return;
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if (num > dlen - dat)
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num = dlen - dat;
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ELRE_DEBUG(1,
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(__F, "re_insert() starting: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, d));
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ELRE_DEBUG(1, (__F, "s == \"%s\"n", s));
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/* open up the space for num chars */
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if (num > 0) {
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b = d + dlen - 1;
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a = b - num;
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while (a >= &d[dat])
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*b-- = *a--;
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d[dlen] = '\0'; /* just in case */
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}
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ELRE_DEBUG(1, (__F,
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"re_insert() after insert: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, d));
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ELRE_DEBUG(1, (__F, "s == \"%s\"n", s));
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/* copy the characters */
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for (a = d + dat; (a < d + dlen) && (num > 0); num--)
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*a++ = *s++;
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ELRE_DEBUG(1,
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(__F, "re_insert() after copy: %d at %d max %d, %s == \"%s\"\n",
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num, dat, dlen, d, s));
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ELRE_DEBUG(1, (__F, "s == \"%s\"n", s));
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}
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/* re_delete():
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* delete num characters d at dat, maximum length of d is dlen
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*/
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private void
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/*ARGSUSED*/
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re_delete(EditLine *el, char *d, int dat, int dlen, int num)
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{
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char *a, *b;
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if (num <= 0)
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return;
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if (dat + num >= dlen) {
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d[dat] = '\0';
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return;
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}
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ELRE_DEBUG(1,
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(__F, "re_delete() starting: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, d));
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/* open up the space for num chars */
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if (num > 0) {
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b = d + dat;
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a = b + num;
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while (a < &d[dlen])
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*b++ = *a++;
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d[dlen] = '\0'; /* just in case */
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}
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ELRE_DEBUG(1,
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(__F, "re_delete() after delete: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, d));
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}
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|
|
|
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/* re__strncopy():
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* Like strncpy without padding.
|
|
*/
|
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private void
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re__strncopy(char *a, char *b, size_t n)
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{
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|
|
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while (n-- && *b)
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*a++ = *b++;
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}
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|
|
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/*****************************************************************
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re_update_line() is based on finding the middle difference of each line
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on the screen; vis:
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/old first difference
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/beginning of line | /old last same /old EOL
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v v v v
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old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as
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new: eddie> Oh, my little buggy says to me, as lurgid as
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^ ^ ^ ^
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\beginning of line | \new last same \new end of line
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\new first difference
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all are character pointers for the sake of speed. Special cases for
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no differences, as well as for end of line additions must be handled.
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|
**************************************************************** */
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/* Minimum at which doing an insert it "worth it". This should be about
|
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* half the "cost" of going into insert mode, inserting a character, and
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* going back out. This should really be calculated from the termcap
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* data... For the moment, a good number for ANSI terminals.
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*/
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#define MIN_END_KEEP 4
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|
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private void
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re_update_line(EditLine *el, char *old, char *new, int i)
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{
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char *o, *n, *p, c;
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char *ofd, *ols, *oe, *nfd, *nls, *ne;
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char *osb, *ose, *nsb, *nse;
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int fx, sx;
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/*
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* find first diff
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|
*/
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for (o = old, n = new; *o && (*o == *n); o++, n++)
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continue;
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ofd = o;
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nfd = n;
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|
|
/*
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|
* Find the end of both old and new
|
|
*/
|
|
while (*o)
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o++;
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/*
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|
* Remove any trailing blanks off of the end, being careful not to
|
|
* back up past the beginning.
|
|
*/
|
|
while (ofd < o) {
|
|
if (o[-1] != ' ')
|
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break;
|
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o--;
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}
|
|
oe = o;
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*oe = '\0';
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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, 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 = (unsigned char)*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 = (unsigned char)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 == 0177) ? '?' : (toascii(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 */
|
|
}
|
|
}
|