1318 lines
32 KiB
C
1318 lines
32 KiB
C
/* $Header: /src/pub/tcsh/ed.refresh.c,v 3.25 1998/11/24 18:17:22 christos Exp $ */
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/*
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* ed.refresh.c: Lower level screen refreshing functions
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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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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#include "sh.h"
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RCSID("$Id: ed.refresh.c,v 3.25 1998/11/24 18:17:22 christos Exp $")
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#include "ed.h"
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/* #define DEBUG_UPDATE */
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/* #define DEBUG_REFRESH */
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/* #define DEBUG_LITERAL */
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/* refresh.c -- refresh the current set of lines on the screen */
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Char *litptr[256];
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static int vcursor_h, vcursor_v;
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static int rprompt_h, rprompt_v;
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static void Draw __P((int));
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static void Vdraw __P((int));
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static void RefreshPromptpart __P((Char *));
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static void update_line __P((Char *, Char *, int));
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static void str_insert __P((Char *, int, int, Char *, int));
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static void str_delete __P((Char *, int, int, int));
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static void str_cp __P((Char *, Char *, int));
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static void PutPlusOne __P((int));
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static void cpy_pad_spaces __P((Char *, Char *, int));
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#if defined(DSPMBYTE)
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static Char *update_line_fix_mbyte_point __P((Char *, Char *, int));
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#endif
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#if defined(DEBUG_UPDATE) || defined(DEBUG_REFRESH) || defined(DEBUG_LITERAL)
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static void dprintf __P((char *, ...));
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#ifdef DEBUG_UPDATE
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static void dprintstr __P((char *, Char *, Char *));
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static void
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dprintstr(str, f, t)
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char *str;
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Char *f, *t;
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{
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dprintf("%s:\"", str);
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while (f < t)
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dprintf("%c", *f++ & ASCII);
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dprintf("\"\r\n");
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}
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#endif /* DEBUG_UPDATE */
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/* dprintf():
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* Print to $DEBUGTTY, so that we can test editing on one pty, and
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* print debugging stuff on another. Don't interrupt the shell while
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* debugging cause you'll mangle up the file descriptors!
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*/
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static void
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#ifdef FUNCPROTO
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dprintf(char *fmt, ...)
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#else
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dprintf(va_list)
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va_dcl
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#endif /* __STDC__ */
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{
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static int fd = -1;
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char *dtty;
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if ((dtty = getenv("DEBUGTTY"))) {
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int o;
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va_list va;
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#ifdef FUNCPROTO
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va_start(va, fmt);
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#else
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char *fmt;
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va_start(va);
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fmt = va_arg(va, char *);
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#endif /* __STDC__ */
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if (fd == -1)
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fd = open(dtty, O_RDWR);
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o = SHOUT;
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flush();
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SHOUT = fd;
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xvprintf(fmt, va);
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va_end(va);
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flush();
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SHOUT = o;
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}
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}
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#endif /* DEBUG_UPDATE || DEBUG_REFRESH || DEBUG_LITERAL */
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static void
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Draw(c) /* draw c, expand tabs, ctl chars */
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register int c;
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{
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register Char ch = c & CHAR;
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if (Isprint(ch)) {
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Vdraw(c);
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return;
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}
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/* from wolman%crltrx.DEC@decwrl.dec.com (Alec Wolman) */
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if (ch == '\n') { /* expand the newline */
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/*
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* Don't force a newline if Vdraw does it (i.e. we're at end of line)
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* - or we will get two newlines and possibly garbage in between
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*/
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int oldv = vcursor_v;
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Vdraw('\0'); /* assure end of line */
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if (oldv == vcursor_v) {
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vcursor_h = 0; /* reset cursor pos */
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vcursor_v++;
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}
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return;
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}
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if (ch == '\t') { /* expand the tab */
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for (;;) {
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Vdraw(' ');
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if ((vcursor_h & 07) == 0)
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break; /* go until tab stop */
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}
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}
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else if (Iscntrl(ch)) {
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#ifndef _OSD_POSIX
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Vdraw('^');
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if (ch == CTL_ESC('\177')) {
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Vdraw('?');
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}
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else {
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/* uncontrolify it; works only for iso8859-1 like sets */
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Vdraw((c | 0100));
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#else /*_OSD_POSIX*/
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if (ch == CTL_ESC('\177')) {
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Vdraw('^');
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Vdraw('?');
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}
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else {
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if (Isupper(_toebcdic[_toascii[c]|0100])
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|| strchr("@[\\]^_", _toebcdic[_toascii[c]|0100]) != NULL)
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{
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Vdraw('^');
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Vdraw(_toebcdic[_toascii[c]|0100]);
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}
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else
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{
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Vdraw('\\');
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Vdraw(((c >> 6) & 7) + '0');
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Vdraw(((c >> 3) & 7) + '0');
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Vdraw((c & 7) + '0');
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}
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#endif /*_OSD_POSIX*/
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}
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}
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#ifdef KANJI
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else if (!adrof(STRnokanji)) {
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Vdraw(c);
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return;
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}
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#endif
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else {
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Vdraw('\\');
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Vdraw(((c >> 6) & 7) + '0');
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Vdraw(((c >> 3) & 7) + '0');
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Vdraw((c & 7) + '0');
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}
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}
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static void
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Vdraw(c) /* draw char c onto V lines */
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register int c;
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{
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#ifdef DEBUG_REFRESH
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# ifdef SHORT_STRINGS
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dprintf("Vdrawing %6.6o '%c'\r\n", c, c & ASCII);
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# else
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dprintf("Vdrawing %3.3o '%c'\r\n", c, c);
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# endif /* SHORT_STRNGS */
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#endif /* DEBUG_REFRESH */
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Vdisplay[vcursor_v][vcursor_h] = (Char) c;
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vcursor_h++; /* advance to next place */
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if (vcursor_h >= TermH) {
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Vdisplay[vcursor_v][TermH] = '\0'; /* assure end of line */
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vcursor_h = 0; /* reset it. */
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vcursor_v++;
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#ifdef DEBUG_REFRESH
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if (vcursor_v >= TermV) { /* should NEVER happen. */
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dprintf("\r\nVdraw: vcursor_v overflow! Vcursor_v == %d > %d\r\n",
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vcursor_v, TermV);
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abort();
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}
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#endif /* DEBUG_REFRESH */
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}
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}
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/*
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* RefreshPromptpart()
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* draws a prompt element, expanding literals (we know it's ASCIZ)
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*/
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static void
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RefreshPromptpart(buf)
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Char *buf;
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{
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register Char *cp;
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static unsigned int litnum = 0;
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if (buf == NULL)
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{
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litnum = 0;
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return;
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}
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for (cp = buf; *cp; cp++) {
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if (*cp & LITERAL) {
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if (litnum < (sizeof(litptr) / sizeof(litptr[0]))) {
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litptr[litnum] = cp;
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#ifdef DEBUG_LITERAL
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dprintf("litnum = %d, litptr = %x:\r\n",
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litnum, litptr[litnum]);
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#endif /* DEBUG_LITERAL */
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}
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while (*cp & LITERAL)
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cp++;
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if (*cp)
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Vdraw((int) (litnum++ | LITERAL));
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else {
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/*
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* XXX: This is a bug, we lose the last literal, if it is not
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* followed by a normal character, but it is too hard to fix
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*/
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break;
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}
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}
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else
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Draw(*cp);
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}
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}
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/*
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* 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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static int OldvcV = 0;
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void
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Refresh()
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{
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register int cur_line;
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register Char *cp;
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int cur_h, cur_v = 0, new_vcv;
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int rhdiff;
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Char oldgetting;
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#ifdef DEBUG_REFRESH
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dprintf("PromptBuf = :%s:\r\n", short2str(PromptBuf));
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dprintf("InputBuf = :%s:\r\n", short2str(InputBuf));
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#endif /* DEBUG_REFRESH */
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oldgetting = GettingInput;
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GettingInput = 0; /* avoid re-entrance via SIGWINCH */
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/* reset the Vdraw cursor, temporarily draw rprompt to calculate its size */
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vcursor_h = 0;
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vcursor_v = 0;
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RefreshPromptpart(NULL);
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RefreshPromptpart(RPromptBuf);
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rprompt_h = vcursor_h;
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rprompt_v = vcursor_v;
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/* reset the Vdraw cursor, draw prompt */
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vcursor_h = 0;
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vcursor_v = 0;
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RefreshPromptpart(NULL);
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RefreshPromptpart(PromptBuf);
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cur_h = -1; /* set flag in case I'm not set */
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/* draw the current input buffer */
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for (cp = InputBuf; (cp < LastChar); cp++) {
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if (cp == Cursor) {
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cur_h = vcursor_h; /* save for later */
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cur_v = vcursor_v;
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}
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Draw(*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 = vcursor_h;
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cur_v = vcursor_v;
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}
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rhdiff = TermH - vcursor_h - rprompt_h;
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if (rprompt_h != 0 && rprompt_v == 0 && vcursor_v == 0 && rhdiff > 1) {
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/*
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* have a right-hand side prompt that will fit on
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* the end of the first line with at least one
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* 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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Draw(' ');
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RefreshPromptpart(RPromptBuf);
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}
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else {
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rprompt_h = 0; /* flag "not using rprompt" */
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rprompt_v = 0;
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}
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new_vcv = vcursor_v; /* must be done BEFORE the NUL is written */
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Vdraw('\0'); /* put NUL on end */
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#ifdef DEBUG_REFRESH
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dprintf("TermH=%d, vcur_h=%d, vcur_v=%d, Vdisplay[0]=\r\n:%80.80s:\r\n",
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TermH, vcursor_h, vcursor_v, short2str(Vdisplay[0]));
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#endif /* DEBUG_REFRESH */
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#ifdef DEBUG_UPDATE
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dprintf("updating %d lines.\r\n", new_vcv);
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#endif /* DEBUG_UPDATE */
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for (cur_line = 0; cur_line <= new_vcv; cur_line++) {
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/* NOTE THAT update_line MAY CHANGE Display[cur_line] */
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update_line(Display[cur_line], Vdisplay[cur_line], cur_line);
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#ifdef WINNT
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flush();
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#endif /* WINNT */
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/*
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* Copy the new line to be the current one, and pad out with spaces
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* to the full width of the terminal so that if we try moving the
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* cursor by writing the character that is at the end of the
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* screen line, it won't be a NUL or some old leftover stuff.
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*/
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cpy_pad_spaces(Display[cur_line], Vdisplay[cur_line], TermH);
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#ifdef notdef
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(void) Strncpy(Display[cur_line], Vdisplay[cur_line], (size_t) TermH);
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Display[cur_line][TermH] = '\0'; /* just in case */
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#endif
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}
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#ifdef DEBUG_REFRESH
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dprintf("\r\nvcursor_v = %d, OldvcV = %d, cur_line = %d\r\n",
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vcursor_v, OldvcV, cur_line);
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#endif /* DEBUG_REFRESH */
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if (OldvcV > new_vcv) {
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for (; cur_line <= OldvcV; cur_line++) {
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update_line(Display[cur_line], STRNULL, cur_line);
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*Display[cur_line] = '\0';
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}
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}
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OldvcV = new_vcv; /* set for next time */
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#ifdef DEBUG_REFRESH
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dprintf("\r\nCursorH = %d, CursorV = %d, cur_h = %d, cur_v = %d\r\n",
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CursorH, CursorV, cur_h, cur_v);
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#endif /* DEBUG_REFRESH */
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#ifdef WINNT
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flush();
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#endif /* WINNT */
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MoveToLine(cur_v); /* go to where the cursor is */
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MoveToChar(cur_h);
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SetAttributes(0); /* Clear all attributes */
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flush(); /* send the output... */
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GettingInput = oldgetting; /* reset to old value */
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}
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#ifdef notdef
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GotoBottom()
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{ /* used to go to last used screen line */
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MoveToLine(OldvcV);
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}
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#endif
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void
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PastBottom()
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{ /* used to go to last used screen line */
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MoveToLine(OldvcV);
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(void) putraw('\r');
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(void) putraw('\n');
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ClearDisp();
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flush();
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}
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/* insert num characters of s into d (in front of the character) at dat,
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maximum length of d is dlen */
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static void
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str_insert(d, dat, dlen, s, num)
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register Char *d;
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register int dat, dlen;
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register Char *s;
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register int num;
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{
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register 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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#ifdef DEBUG_REFRESH
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dprintf("str_insert() starting: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, short2str(d));
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dprintf("s == \"%s\"n", short2str(s));
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#endif /* DEBUG_REFRESH */
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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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#ifdef DEBUG_REFRESH
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dprintf("str_insert() after insert: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, short2str(d));
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dprintf("s == \"%s\"n", short2str(s));
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#endif /* DEBUG_REFRESH */
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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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#ifdef DEBUG_REFRESH
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dprintf("str_insert() after copy: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, d, short2str(s));
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dprintf("s == \"%s\"n", short2str(s));
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#endif /* DEBUG_REFRESH */
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}
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/* delete num characters d at dat, maximum length of d is dlen */
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static void
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str_delete(d, dat, dlen, num)
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|
register Char *d;
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|
register int dat, dlen, num;
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{
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|
register 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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|
|
#ifdef DEBUG_REFRESH
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|
dprintf("str_delete() starting: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, short2str(d));
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|
#endif /* DEBUG_REFRESH */
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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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|
}
|
|
#ifdef DEBUG_REFRESH
|
|
dprintf("str_delete() after delete: %d at %d max %d, d == \"%s\"\n",
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num, dat, dlen, short2str(d));
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|
#endif /* DEBUG_REFRESH */
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|
}
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|
|
|
static void
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str_cp(a, b, n)
|
|
register Char *a, *b;
|
|
register int n;
|
|
{
|
|
while (n-- && *b)
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|
*a++ = *b++;
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|
}
|
|
|
|
|
|
#if defined(DSPMBYTE) /* BY TAGA Nayuta VERY THANKS */
|
|
static Char *
|
|
update_line_fix_mbyte_point(start, target, d)
|
|
Char *start, *target;
|
|
int d;
|
|
{
|
|
if (_enable_mbdisp) {
|
|
while (*start) {
|
|
if (target == start)
|
|
break;
|
|
if (target < start)
|
|
return target + d;
|
|
if (Ismbyte1(*start) && Ismbyte2(*(start + 1)))
|
|
start++;
|
|
start++;
|
|
}
|
|
}
|
|
return target;
|
|
}
|
|
#endif
|
|
|
|
/* ****************************************************************
|
|
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
|
|
|
|
static void /* could be changed to make it smarter */
|
|
update_line(old, new, cur_line)
|
|
register Char *old, *new;
|
|
int cur_line;
|
|
{
|
|
register Char *o, *n, *p, c;
|
|
Char *ofd, *ols, *oe, *nfd, *nls, *ne;
|
|
Char *osb, *ose, *nsb, *nse;
|
|
int fx, sx;
|
|
|
|
/*
|
|
* find first diff
|
|
*/
|
|
for (o = old, n = new; *o && (*o == *n); o++, n++)
|
|
continue;
|
|
ofd = o;
|
|
nfd = n;
|
|
|
|
/*
|
|
* Find the end of both old and new
|
|
*/
|
|
while (*o)
|
|
o++;
|
|
/*
|
|
* Remove any trailing blanks off of the end, being careful not to
|
|
* back up past the beginning.
|
|
*/
|
|
while (ofd < o) {
|
|
if (o[-1] != ' ')
|
|
break;
|
|
o--;
|
|
}
|
|
oe = o;
|
|
*oe = (Char) 0;
|
|
|
|
while (*n)
|
|
n++;
|
|
|
|
/* remove blanks from end of new */
|
|
while (nfd < n) {
|
|
if (n[-1] != ' ')
|
|
break;
|
|
n--;
|
|
}
|
|
ne = n;
|
|
*ne = (Char) 0;
|
|
|
|
/*
|
|
* if no diff, continue to next line of redraw
|
|
*/
|
|
if (*ofd == '\0' && *nfd == '\0') {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("no difference.\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#ifdef notdef
|
|
/*
|
|
* If `last same' is before `same end' re-adjust
|
|
*/
|
|
if (ols < ose)
|
|
ols = ose;
|
|
if (nls < nse)
|
|
nls = nse;
|
|
#endif
|
|
|
|
/*
|
|
* 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 (!T_CanIns) {
|
|
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 (!T_CanDel) {
|
|
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));
|
|
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("\n");
|
|
dprintf("ofd %d, osb %d, ose %d, ols %d, oe %d\n",
|
|
ofd - old, osb - old, ose - old, ols - old, oe - old);
|
|
dprintf("nfd %d, nsb %d, nse %d, nls %d, ne %d\n",
|
|
nfd - new, nsb - new, nse - new, nls - new, ne - new);
|
|
dprintf("xxx-xxx:\"00000000001111111111222222222233333333334\"\r\n");
|
|
dprintf("xxx-xxx:\"01234567890123456789012345678901234567890\"\r\n");
|
|
dprintstr("old- oe", old, oe);
|
|
dprintstr("new- ne", new, ne);
|
|
dprintstr("old-ofd", old, ofd);
|
|
dprintstr("new-nfd", new, nfd);
|
|
dprintstr("ofd-osb", ofd, osb);
|
|
dprintstr("nfd-nsb", nfd, nsb);
|
|
dprintstr("osb-ose", osb, ose);
|
|
dprintstr("nsb-nse", nsb, nse);
|
|
dprintstr("ose-ols", ose, ols);
|
|
dprintstr("nse-nls", nse, nls);
|
|
dprintstr("ols- oe", ols, oe);
|
|
dprintstr("nls- ne", nls, ne);
|
|
#endif /* DEBUG_UPDATE */
|
|
|
|
/*
|
|
* CursorV to this line cur_line MUST be in this routine so that if we
|
|
* don't have to change the line, we don't move to it. CursorH to first
|
|
* diff char
|
|
*/
|
|
MoveToLine(cur_line);
|
|
|
|
#if defined(DSPMBYTE) /* BY TAGA Nayuta VERY THANKS */
|
|
ofd = update_line_fix_mbyte_point(old, ofd, -1);
|
|
osb = update_line_fix_mbyte_point(old, osb, 1);
|
|
ose = update_line_fix_mbyte_point(old, ose, -1);
|
|
ols = update_line_fix_mbyte_point(old, ols, 1);
|
|
nfd = update_line_fix_mbyte_point(new, nfd, -1);
|
|
nsb = update_line_fix_mbyte_point(new, nsb, 1);
|
|
nse = update_line_fix_mbyte_point(new, nse, -1);
|
|
nls = update_line_fix_mbyte_point(new, nls, 1);
|
|
#endif
|
|
|
|
/*
|
|
* 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 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
|
|
* (TermH - 1) 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 < TermH)) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("first diff insert at %d...\r\n", nfd - new);
|
|
#endif /* DEBUG_UPDATE */
|
|
/*
|
|
* Move to the first char to insert, where the first diff is.
|
|
*/
|
|
MoveToChar(nfd - new);
|
|
/*
|
|
* Check if we have stuff to keep at end
|
|
*/
|
|
if (nsb != ne) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("with stuff to keep at end\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
/*
|
|
* insert fx chars of new starting at nfd
|
|
*/
|
|
if (fx > 0) {
|
|
#ifdef DEBUG_UPDATE
|
|
if (!T_CanIns)
|
|
dprintf(" ERROR: cannot insert in early first diff\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
Insert_write(nfd, fx);
|
|
str_insert(old, (int) (ofd - old), TermH, nfd, fx);
|
|
}
|
|
/*
|
|
* write (nsb-nfd) - fx chars of new starting at (nfd + fx)
|
|
*/
|
|
so_write(nfd + fx, (nsb - nfd) - fx);
|
|
str_cp(ofd + fx, nfd + fx, (int) ((nsb - nfd) - fx));
|
|
}
|
|
else {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("without anything to save\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
so_write(nfd, (nsb - nfd));
|
|
str_cp(ofd, nfd, (int) (nsb - nfd));
|
|
/*
|
|
* Done
|
|
*/
|
|
return;
|
|
}
|
|
}
|
|
else if (fx < 0) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("first diff delete at %d...\r\n", ofd - old);
|
|
#endif /* DEBUG_UPDATE */
|
|
/*
|
|
* move to the first char to delete where the first diff is
|
|
*/
|
|
MoveToChar(ofd - old);
|
|
/*
|
|
* Check if we have stuff to save
|
|
*/
|
|
if (osb != oe) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("with stuff to save at end\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
/*
|
|
* fx is less than zero *always* here but we check for code
|
|
* symmetry
|
|
*/
|
|
if (fx < 0) {
|
|
#ifdef DEBUG_UPDATE
|
|
if (!T_CanDel)
|
|
dprintf(" ERROR: cannot delete in first diff\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
DeleteChars(-fx);
|
|
str_delete(old, (int) (ofd - old), TermH, -fx);
|
|
}
|
|
/*
|
|
* write (nsb-nfd) chars of new starting at nfd
|
|
*/
|
|
so_write(nfd, (nsb - nfd));
|
|
str_cp(ofd, nfd, (int) (nsb - nfd));
|
|
|
|
}
|
|
else {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("but with nothing left to save\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
/*
|
|
* write (nsb-nfd) chars of new starting at nfd
|
|
*/
|
|
so_write(nfd, (nsb - nfd));
|
|
#ifdef DEBUG_REFRESH
|
|
dprintf("cleareol %d\n", (oe - old) - (ne - new));
|
|
#endif /* DEBUG_UPDATE */
|
|
#ifndef WINNT
|
|
ClearEOL((oe - old) - (ne - new));
|
|
#else
|
|
/*
|
|
* The calculation above does not work too well on NT
|
|
*/
|
|
ClearEOL(TermH - CursorH);
|
|
#endif /*WINNT*/
|
|
/*
|
|
* Done
|
|
*/
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
fx = 0;
|
|
|
|
if (sx < 0) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("second diff delete at %d...\r\n", (ose - old) + fx);
|
|
#endif /* DEBUG_UPDATE */
|
|
/*
|
|
* Check if we have stuff to delete
|
|
*/
|
|
/*
|
|
* fx is the number of characters inserted (+) or deleted (-)
|
|
*/
|
|
|
|
MoveToChar((ose - old) + fx);
|
|
/*
|
|
* Check if we have stuff to save
|
|
*/
|
|
if (ols != oe) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("with stuff to save at end\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
/*
|
|
* Again a duplicate test.
|
|
*/
|
|
if (sx < 0) {
|
|
#ifdef DEBUG_UPDATE
|
|
if (!T_CanDel)
|
|
dprintf(" ERROR: cannot delete in second diff\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
DeleteChars(-sx);
|
|
}
|
|
|
|
/*
|
|
* write (nls-nse) chars of new starting at nse
|
|
*/
|
|
so_write(nse, (nls - nse));
|
|
}
|
|
else {
|
|
int olen = (int) (oe - old + fx);
|
|
if (olen > TermH)
|
|
olen = TermH;
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("but with nothing left to save\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
so_write(nse, (nls - nse));
|
|
#ifdef DEBUG_REFRESH
|
|
dprintf("cleareol %d\n", olen - (ne - new));
|
|
#endif /* DEBUG_UPDATE */
|
|
#ifndef WINNT
|
|
ClearEOL(olen - (ne - new));
|
|
#else
|
|
/*
|
|
* The calculation above does not work too well on NT
|
|
*/
|
|
ClearEOL(TermH - CursorH);
|
|
#endif /*WINNT*/
|
|
}
|
|
}
|
|
|
|
/*
|
|
* if we have a first insert AND WE HAVEN'T ALREADY DONE IT...
|
|
*/
|
|
if ((nsb != nfd) && (osb - ofd) <= (nsb - nfd) && (fx == 0)) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("late first diff insert at %d...\r\n", nfd - new);
|
|
#endif /* DEBUG_UPDATE */
|
|
|
|
MoveToChar(nfd - new);
|
|
/*
|
|
* Check if we have stuff to keep at the end
|
|
*/
|
|
if (nsb != ne) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("with stuff to keep at end\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
/*
|
|
* 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
|
|
*/
|
|
#ifdef DEBUG_UPDATE
|
|
if (!T_CanIns)
|
|
dprintf(" ERROR: cannot insert in late first diff\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
Insert_write(nfd, fx);
|
|
str_insert(old, (int) (ofd - old), TermH, nfd, fx);
|
|
}
|
|
|
|
/*
|
|
* write (nsb-nfd) - fx chars of new starting at (nfd + fx)
|
|
*/
|
|
so_write(nfd + fx, (nsb - nfd) - fx);
|
|
str_cp(ofd + fx, nfd + fx, (int) ((nsb - nfd) - fx));
|
|
}
|
|
else {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("without anything to save\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
so_write(nfd, (nsb - nfd));
|
|
str_cp(ofd, nfd, (int) (nsb - nfd));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* line is now NEW up to nse
|
|
*/
|
|
if (sx >= 0) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("second diff insert at %d...\r\n", nse - new);
|
|
#endif /* DEBUG_UPDATE */
|
|
MoveToChar(nse - new);
|
|
if (ols != oe) {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("with stuff to keep at end\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
if (sx > 0) {
|
|
/* insert sx chars of new starting at nse */
|
|
#ifdef DEBUG_UPDATE
|
|
if (!T_CanIns)
|
|
dprintf(" ERROR: cannot insert in second diff\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
Insert_write(nse, sx);
|
|
}
|
|
|
|
/*
|
|
* write (nls-nse) - sx chars of new starting at (nse + sx)
|
|
*/
|
|
so_write(nse + sx, (nls - nse) - sx);
|
|
}
|
|
else {
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("without anything to save\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
so_write(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.
|
|
*/
|
|
}
|
|
}
|
|
#ifdef DEBUG_UPDATE
|
|
dprintf("done.\r\n");
|
|
#endif /* DEBUG_UPDATE */
|
|
}
|
|
|
|
|
|
static void
|
|
cpy_pad_spaces(dst, src, width)
|
|
register Char *dst, *src;
|
|
register int width;
|
|
{
|
|
register int i;
|
|
|
|
for (i = 0; i < width; i++) {
|
|
if (*src == (Char) 0)
|
|
break;
|
|
*dst++ = *src++;
|
|
}
|
|
|
|
while (i < width) {
|
|
*dst++ = ' ';
|
|
i++;
|
|
}
|
|
*dst = (Char) 0;
|
|
}
|
|
|
|
void
|
|
RefCursor()
|
|
{ /* only move to new cursor pos */
|
|
register Char *cp, c;
|
|
register int h, th, v;
|
|
|
|
/* first we must find where the cursor is... */
|
|
h = 0;
|
|
v = 0;
|
|
th = TermH; /* optimize for speed */
|
|
|
|
for (cp = PromptBuf; *cp; cp++) { /* do prompt */
|
|
if (*cp & LITERAL)
|
|
continue;
|
|
c = *cp & CHAR; /* extra speed plus strip the inverse */
|
|
h++; /* all chars at least this long */
|
|
|
|
/* from wolman%crltrx.DEC@decwrl.dec.com (Alec Wolman) */
|
|
/* lets handle newline as part of the prompt */
|
|
|
|
if (c == '\n') {
|
|
h = 0;
|
|
v++;
|
|
}
|
|
else {
|
|
if (c == '\t') { /* if a tab, to next tab stop */
|
|
while (h & 07) {
|
|
h++;
|
|
}
|
|
}
|
|
else if (Iscntrl(c)) { /* if control char */
|
|
h++;
|
|
if (h > th) { /* if overflow, compensate */
|
|
h = 1;
|
|
v++;
|
|
}
|
|
}
|
|
else if (!Isprint(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++;
|
|
}
|
|
}
|
|
|
|
for (cp = InputBuf; cp < Cursor; cp++) { /* do input buffer to Cursor */
|
|
c = *cp & CHAR; /* extra speed plus strip the inverse */
|
|
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(c)) { /* if control char */
|
|
h++;
|
|
if (h > th) { /* if overflow, compensate */
|
|
h = 1;
|
|
v++;
|
|
}
|
|
}
|
|
else if (!Isprint(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 */
|
|
MoveToLine(v);
|
|
MoveToChar(h);
|
|
flush();
|
|
}
|
|
|
|
static void
|
|
PutPlusOne(c)
|
|
int c;
|
|
{
|
|
(void) putraw(c);
|
|
Display[CursorV][CursorH++] = (Char) c;
|
|
if (CursorH >= TermH) { /* if we must overflow */
|
|
CursorH = 0;
|
|
CursorV++;
|
|
OldvcV++;
|
|
if (T_Margin & MARGIN_AUTO) {
|
|
if (T_Margin & MARGIN_MAGIC) {
|
|
(void) putraw(' ');
|
|
(void) putraw('\b');
|
|
}
|
|
}
|
|
else {
|
|
(void) putraw('\r');
|
|
(void) putraw('\n');
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
RefPlusOne()
|
|
{ /* we added just one char, handle it fast.
|
|
* assumes that screen cursor == real cursor */
|
|
register Char c, mc;
|
|
|
|
c = Cursor[-1] & CHAR; /* the char we just added */
|
|
|
|
if (c == '\t' || Cursor != LastChar) {
|
|
Refresh(); /* too hard to handle */
|
|
return;
|
|
}
|
|
|
|
if (rprompt_h != 0 && (TermH - CursorH - rprompt_h < 3)) {
|
|
Refresh(); /* clear out rprompt if less than one char gap*/
|
|
return;
|
|
} /* else (only do at end of line, no TAB) */
|
|
|
|
if (Iscntrl(c)) { /* if control char, do caret */
|
|
#ifndef _OSD_POSIX
|
|
mc = (c == '\177') ? '?' : (c | 0100);
|
|
PutPlusOne('^');
|
|
PutPlusOne(mc);
|
|
#else /*_OSD_POSIX*/
|
|
if (_toascii[c] == '\177' || Isupper(_toebcdic[_toascii[c]|0100])
|
|
|| strchr("@[\\]^_", _toebcdic[_toascii[c]|0100]) != NULL)
|
|
{
|
|
mc = (_toascii[c] == '\177') ? '?' : _toebcdic[_toascii[c]|0100];
|
|
PutPlusOne('^');
|
|
PutPlusOne(mc);
|
|
}
|
|
else
|
|
{
|
|
PutPlusOne('\\');
|
|
PutPlusOne(((c >> 6) & 7) + '0');
|
|
PutPlusOne(((c >> 3) & 7) + '0');
|
|
PutPlusOne((c & 7) + '0');
|
|
}
|
|
#endif /*_OSD_POSIX*/
|
|
}
|
|
else if (Isprint(c)) { /* normal char */
|
|
PutPlusOne(c);
|
|
}
|
|
#ifdef KANJI
|
|
else if (!adrof(STRnokanji)) {
|
|
PutPlusOne(c);
|
|
}
|
|
#endif
|
|
else {
|
|
PutPlusOne('\\');
|
|
PutPlusOne(((c >> 6) & 7) + '0');
|
|
PutPlusOne(((c >> 3) & 7) + '0');
|
|
PutPlusOne((c & 7) + '0');
|
|
}
|
|
flush();
|
|
}
|
|
|
|
/* clear the screen buffers so that new new prompt starts fresh. */
|
|
|
|
void
|
|
ClearDisp()
|
|
{
|
|
register int i;
|
|
|
|
CursorV = 0; /* clear the display buffer */
|
|
CursorH = 0;
|
|
for (i = 0; i < TermV; i++)
|
|
(void) memset(Display[i], 0, TermH * sizeof(Display[0][0]));
|
|
OldvcV = 0;
|
|
}
|
|
|
|
void
|
|
ClearLines()
|
|
{ /* Make sure all lines are *really* blank */
|
|
register int i;
|
|
|
|
if (T_CanCEOL) {
|
|
/*
|
|
* Clear the lines from the bottom up so that if we try moving
|
|
* the cursor down by writing the character that is at the end
|
|
* of the screen line, we won't rewrite a character that shouldn't
|
|
* be there.
|
|
*/
|
|
for (i = OldvcV; i >= 0; i--) { /* for each line on the screen */
|
|
MoveToLine(i);
|
|
MoveToChar(0);
|
|
ClearEOL(TermH);
|
|
}
|
|
}
|
|
else {
|
|
MoveToLine(OldvcV); /* go to last line */
|
|
(void) putraw('\r'); /* go to BOL */
|
|
(void) putraw('\n'); /* go to new line */
|
|
}
|
|
}
|