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8abd4c975c
Our libedit has been diverging from the mainstream version maintained in NetBSD. As a consequence it has been difficult to do an appropriate MFV and we have been bringing only partial updates. Here we update most of the files to at least match the version available in NetBSD's snapshot of 20091228. This version was chosen because it still doesn't include wide character support (UTF-8), which involves many changes and new files. From NetBSD's logs: Dec 15 22:13:33 2006 - editline.3 el.c el.h histedit.h add EL_GETFP, and EL_SETFP. Apr 5 15:53:28 2008 - editline.3 el.c histedit.h readline.c add EL_REFRESH for the benefit of readline Sep 10 15:45:37 2008 - common.c el.c read.c refresh.c sig.c term.c term.h tty.c Allow a single process to control multiple ttys (for pthreads using _REENTRANT) using multiple EditLine objects. Jan 18 12:17:24 2009 - el.c read.c readline.c fix -Wsign-compare issues Feb 6 14:40:32 2009 - history.c Plug memory leak, from MySQL. Feb 5 19:15:44 2009 - histedit.h read.c match documentation in el_push Feb 6 13:14:37 2009 - vi.c Portability fix. Feb 12 13:39:49 2009 - readline.c term.c More fixes for existing portability stuff. Feb 15 21:24:13 2009 - el.h read.c don't restart on EINTR, instead return NULL immediately. From Anon Ymous Feb 15 21:25:01 2009 - sig.c sig.h in order for read() to return EINTR we need to use sigaction, not signal, otherwise SA_RESTART is set. Feb 15 21:55:23 2009 - chared.c chared.h common.c emacs.c filecomplete.c filecomplete.h key.c key.h read.c readline.c refresh.c search.c term.c tokenizer.c tty.c vi.c pass lint on _LP64. Feb 17 21:34:26 2009 - el.c histedit.h prompt.c prompt.h allow for a prompt argument. Feb 18 15:04:40 2009 - sig.c SA_RESTART for all signals but SIGINT. From Anon Ymous. Feb 19 15:20:22 2009 - read.c sig.c sig.h reset and redraw on sigcont. From Anon Ymous. Feb 21 23:31:56 2009 - key.c key.h readline.c vi.c more size_t stuff. Mar 10 20:46:15 2009 - editline.3 read.c make el_gets set the count to -1 on error to distinguish between EOF and error. Mar 31 17:38:27 2009 - editline.3 el.c histedit.h prompt.c prompt.h refresh.c term.c term.h Implement literal prompt sequences. Now someone can implement RL_PROMPT_START_LITERAL/RL_PROMPT_END_LITERAL :-) Mar 31 21:33:17 2009 - term.c cast to size_t to avoid sign / unsigned comparison warning. Apr 23 02:03 2009 - term.c Apply patch (requested by msaitoh in ticket #2007): Coverity CID 1668: Plug memory leak when malloc() failed.:55 2009 May 11 18:33:30 2009 - editline.3 el.c histedit.h restore binary compatibility by providing new prompt functions that take an extra literal character. May 19 21:45:14 2009 - refresh.c always scroll when we advance past bottom. From Caleb Welton cwelton at greenplum dot com. Jul 17 12:27:57 2009 - term.c - off by one in the term.h case. - make code more similar to tcsh (if we want to handle wide chars, this is needed; for now it is a no-op) Jul 22 15:56:29 2009 - el.c Move filename to the scope it is being used. From Michael Cook mcook at bbn dot com Jul 22 15:57:00 2009 - read.c Always initialize nread since it is an out param. From Michael Cook mcook at bbn dot com Jul 22 18:25:26 2009 - el.c Only need path if we have issetugid... From Anon Ymous Jul 25 21:19:23 2009 - el.c Ignore comment lines in .editrc from Jess Thrysoee Sep 7 21:24:33 2009 histedit.h history.c readline.c apply apple patches from: http://opensource.apple.com/source/libedit/libedit-11/patches/ Dec 28 21:52:43 2009 - refresh.c Fix bug where tab completion on the second or > line that caused listing ended up corrupting the display by an extra space in the beginning. Reported by Mac Chan. Dec 28 22:15:36 2009 - refresh.c term.c reduce diff with tcsh Obtained from: NetBSD Tested by: bapt, jilles and current@ MFC after: 1 week
1147 lines
30 KiB
C
1147 lines
30 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. 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 1.34 2009/12/28 22:15:36 christos 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 <ctype.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_nextline(EditLine *);
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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_clear_eol(EditLine *, int, int, int);
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private void re__strncopy(char *, char *, size_t);
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private void re__copy_and_pad(char *, const char *, size_t);
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#ifdef DEBUG_REFRESH
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private void re_printstr(EditLine *, const 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 (/*CONSTCOND*/ a) { \
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(void) fprintf b; \
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c; \
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} \
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while (/*CONSTCOND*/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, const 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_nextline():
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* Move to the next line or scroll
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*/
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private void
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re_nextline(EditLine *el)
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{
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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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/* 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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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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re_nextline(el);
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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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/* assure end of line */
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el->el_vdisplay[el->el_refresh.r_cursor.v][el->el_term.t_size.h]
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= '\0';
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re_nextline(el);
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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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if (el->el_line.cursor >= el->el_line.lastchar) {
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if (el->el_map.current == el->el_map.alt
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&& el->el_line.lastchar != el->el_line.buffer)
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el->el_line.cursor = el->el_line.lastchar - 1;
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else
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el->el_line.cursor = el->el_line.lastchar;
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}
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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", (size_t)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(el, '\n');
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re_clear_display(el);
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term__flush(el);
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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 __unused,
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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 __unused,
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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;
|
|
}
|
|
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_clear_eol():
|
|
* Find the number of characters we need to clear till the end of line
|
|
* in order to make sure that we have cleared the previous contents of
|
|
* the line. fx and sx is the number of characters inserted or deleted
|
|
* int the first or second diff, diff is the difference between the
|
|
* number of characters between the new and old line.
|
|
*/
|
|
private void
|
|
re_clear_eol(EditLine *el, int fx, int sx, int diff)
|
|
{
|
|
|
|
ELRE_DEBUG(1, (__F, "re_clear_eol sx %d, fx %d, diff %d\n",
|
|
sx, fx, diff));
|
|
|
|
if (fx < 0)
|
|
fx = -fx;
|
|
if (sx < 0)
|
|
sx = -sx;
|
|
if (fx > diff)
|
|
diff = fx;
|
|
if (sx > diff)
|
|
diff = sx;
|
|
|
|
ELRE_DEBUG(1, (__F, "re_clear_eol %d\n", diff));
|
|
term_clear_EOL(el, diff);
|
|
}
|
|
|
|
/*****************************************************************
|
|
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;
|
|
size_t len;
|
|
|
|
/*
|
|
* 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 = (int)((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 = (int)((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 = (int)((nsb - nfd) - (osb - ofd));
|
|
sx = (int)((nls - nse) - (ols - ose));
|
|
|
|
ELRE_DEBUG(1, (__F, "fx %d, sx %d\n", fx, sx));
|
|
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, (int)(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, (int)(ofd - old),
|
|
el->el_term.t_size.h, nfd, fx);
|
|
}
|
|
/*
|
|
* write (nsb-nfd) - fx chars of new starting at
|
|
* (nfd + fx)
|
|
*/
|
|
len = (size_t) ((nsb - nfd) - fx);
|
|
term_overwrite(el, (nfd + fx), len);
|
|
re__strncopy(ofd + fx, nfd + fx, len);
|
|
} else {
|
|
ELRE_DEBUG(1, (__F, "without anything to save\r\n"));
|
|
len = (size_t)(nsb - nfd);
|
|
term_overwrite(el, nfd, len);
|
|
re__strncopy(ofd, nfd, len);
|
|
/*
|
|
* 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, (int)(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, (int)(ofd - old),
|
|
el->el_term.t_size.h, -fx);
|
|
}
|
|
/*
|
|
* write (nsb-nfd) chars of new starting at nfd
|
|
*/
|
|
len = (size_t) (nsb - nfd);
|
|
term_overwrite(el, nfd, len);
|
|
re__strncopy(ofd, nfd, len);
|
|
|
|
} 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, (size_t)(nsb - nfd));
|
|
re_clear_eol(el, fx, sx,
|
|
(int)((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, (int)((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, (size_t)(nls - nse));
|
|
} else {
|
|
ELRE_DEBUG(1, (__F,
|
|
"but with nothing left to save\r\n"));
|
|
term_overwrite(el, nse, (size_t)(nls - nse));
|
|
re_clear_eol(el, fx, sx,
|
|
(int)((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, (int)(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 = (int)((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, (int)(ofd - old),
|
|
el->el_term.t_size.h, nfd, fx);
|
|
}
|
|
/*
|
|
* write (nsb-nfd) - fx chars of new starting at
|
|
* (nfd + fx)
|
|
*/
|
|
len = (size_t) ((nsb - nfd) - fx);
|
|
term_overwrite(el, (nfd + fx), len);
|
|
re__strncopy(ofd + fx, nfd + fx, len);
|
|
} else {
|
|
ELRE_DEBUG(1, (__F, "without anything to save\r\n"));
|
|
len = (size_t) (nsb - nfd);
|
|
term_overwrite(el, nfd, len);
|
|
re__strncopy(ofd, nfd, len);
|
|
}
|
|
}
|
|
/*
|
|
* line is now NEW up to nse
|
|
*/
|
|
if (sx >= 0) {
|
|
ELRE_DEBUG(1, (__F,
|
|
"second diff insert at %d...\r\n", (int)(nse - new)));
|
|
term_move_to_char(el, (int)(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),
|
|
(size_t)((nls - nse) - sx));
|
|
} else {
|
|
ELRE_DEBUG(1, (__F, "without anything to save\r\n"));
|
|
term_overwrite(el, nse, (size_t)(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)
|
|
{
|
|
size_t 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;
|
|
|
|
if (el->el_line.cursor >= el->el_line.lastchar) {
|
|
if (el->el_map.current == el->el_map.alt
|
|
&& el->el_line.lastchar != el->el_line.buffer)
|
|
el->el_line.cursor = el->el_line.lastchar - 1;
|
|
else
|
|
el->el_line.cursor = el->el_line.lastchar;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
switch (c) {
|
|
case '\n': /* handle newline in data part too */
|
|
h = 0;
|
|
v++;
|
|
break;
|
|
case '\t': /* if a tab, to next tab stop */
|
|
while (++h & 07)
|
|
continue;
|
|
break;
|
|
default:
|
|
if (iscntrl((unsigned char) c))
|
|
h += 2; /* ^x */
|
|
else if (!isprint((unsigned char) c))
|
|
h += 4; /* octal \xxx */
|
|
else
|
|
h++;
|
|
break;
|
|
}
|
|
|
|
if (h >= th) { /* check, extra long tabs picked up here also */
|
|
h -= th;
|
|
v++;
|
|
}
|
|
}
|
|
|
|
/* now go there */
|
|
term_move_to_line(el, v);
|
|
term_move_to_char(el, h);
|
|
term__flush(el);
|
|
}
|
|
|
|
|
|
/* re_fastputc():
|
|
* Add a character fast.
|
|
*/
|
|
private void
|
|
re_fastputc(EditLine *el, int c)
|
|
{
|
|
|
|
term__putc(el, 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(el, ' ');
|
|
term__putc(el, '\b');
|
|
}
|
|
} else {
|
|
term__putc(el, '\r');
|
|
term__putc(el, '\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) & 3) + '0'));
|
|
re_fastputc(el, (int)(((((unsigned int)c) >> 3) & 7) + '0'));
|
|
re_fastputc(el, (c & 7) + '0');
|
|
}
|
|
term__flush(el);
|
|
}
|
|
|
|
|
|
/* 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;
|
|
for (i = el->el_refresh.r_oldcv; i >= 0; i--) {
|
|
/* for each line on the screen */
|
|
term_move_to_line(el, i);
|
|
term_move_to_char(el, 0);
|
|
term_clear_EOL(el, el->el_term.t_size.h);
|
|
}
|
|
} else {
|
|
term_move_to_line(el, el->el_refresh.r_oldcv);
|
|
/* go to last line */
|
|
term__putc(el, '\r'); /* go to BOL */
|
|
term__putc(el, '\n'); /* go to new line */
|
|
}
|
|
}
|