819 lines
23 KiB
C
819 lines
23 KiB
C
/*-
|
|
* Copyright (c) 1992, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)svi_refresh.c 8.62 (Berkeley) 8/17/94";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <bitstring.h>
|
|
#include <ctype.h>
|
|
#include <limits.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
|
|
#include "compat.h"
|
|
#include <curses.h>
|
|
#include <db.h>
|
|
#include <regex.h>
|
|
|
|
#include "vi.h"
|
|
#include "svi_screen.h"
|
|
#include "../sex/sex_screen.h"
|
|
|
|
static int svi_modeline __P((SCR *, EXF *));
|
|
|
|
int
|
|
svi_refresh(sp, ep)
|
|
SCR *sp;
|
|
EXF *ep;
|
|
{
|
|
SCR *tsp;
|
|
u_int paintbits;
|
|
|
|
/*
|
|
* 1: Resize the screen.
|
|
*
|
|
* Notice that a resize is requested, and set up everything so that
|
|
* the file gets reinitialized. Done here, instead of in the vi loop
|
|
* because there may be other initialization that other screens need
|
|
* to do. The actual changing of the row/column values was done by
|
|
* calling the ex options code which put them into the environment,
|
|
* which is used by curses. Stupid, but ugly.
|
|
*/
|
|
if (F_ISSET(sp, S_RESIZE)) {
|
|
/* Reinitialize curses. */
|
|
if (svi_curses_end(sp) || svi_curses_init(sp))
|
|
return (1);
|
|
|
|
/* Invalidate the line size cache. */
|
|
SVI_SCR_CFLUSH(SVP(sp));
|
|
|
|
/*
|
|
* Fill the map, incidentally losing any svi_line()
|
|
* cached information.
|
|
*/
|
|
if (svi_sm_fill(sp, ep, sp->lno, P_FILL))
|
|
return (1);
|
|
F_CLR(sp, S_RESIZE | S_REFORMAT);
|
|
F_SET(sp, S_REDRAW);
|
|
}
|
|
|
|
/*
|
|
* 2: S_REFRESH
|
|
*
|
|
* If S_REFRESH is set in the current screen, repaint everything
|
|
* that we can find.
|
|
*/
|
|
if (F_ISSET(sp, S_REFRESH))
|
|
for (tsp = sp->gp->dq.cqh_first;
|
|
tsp != (void *)&sp->gp->dq; tsp = tsp->q.cqe_next)
|
|
if (tsp != sp)
|
|
F_SET(tsp, S_REDRAW);
|
|
/*
|
|
* 3: Related or dirtied screens, or screens with messages.
|
|
*
|
|
* If related screens share a view into a file, they may have been
|
|
* modified as well. Refresh any screens with paint or dirty bits
|
|
* set, or where messages are waiting. Finally, if we refresh any
|
|
* screens other than the current one, the cursor will be trashed.
|
|
*/
|
|
paintbits = S_REDRAW | S_REFORMAT | S_REFRESH;
|
|
if (O_ISSET(sp, O_NUMBER))
|
|
paintbits |= S_RENUMBER;
|
|
for (tsp = sp->gp->dq.cqh_first;
|
|
tsp != (void *)&sp->gp->dq; tsp = tsp->q.cqe_next)
|
|
if (tsp != sp &&
|
|
(F_ISSET(tsp, paintbits) ||
|
|
F_ISSET(SVP(tsp), SVI_SCREENDIRTY) ||
|
|
tsp->msgq.lh_first != NULL &&
|
|
!F_ISSET(tsp->msgq.lh_first, M_EMPTY))) {
|
|
(void)svi_paint(tsp, tsp->ep);
|
|
F_CLR(SVP(tsp), SVI_SCREENDIRTY);
|
|
F_SET(SVP(sp), SVI_CUR_INVALID);
|
|
}
|
|
|
|
/*
|
|
* 4: Refresh the current screen.
|
|
*
|
|
* Always refresh the current screen, it may be a cursor movement.
|
|
* Also, always do it last -- that way, S_REFRESH can be set in
|
|
* the current screen only, and the screen won't flash.
|
|
*/
|
|
F_CLR(sp, SVI_SCREENDIRTY);
|
|
return (svi_paint(sp, ep));
|
|
}
|
|
|
|
/*
|
|
* svi_paint --
|
|
* This is the guts of the vi curses screen code. The idea is that
|
|
* the SCR structure passed in contains the new coordinates of the
|
|
* screen. What makes this hard is that we don't know how big
|
|
* characters are, doing input can put the cursor in illegal places,
|
|
* and we're frantically trying to avoid repainting unless it's
|
|
* absolutely necessary. If you change this code, you'd better know
|
|
* what you're doing. It's subtle and quick to anger.
|
|
*/
|
|
int
|
|
svi_paint(sp, ep)
|
|
SCR *sp;
|
|
EXF *ep;
|
|
{
|
|
SMAP *smp, tmp;
|
|
SVI_PRIVATE *svp;
|
|
recno_t lastline, lcnt;
|
|
size_t cwtotal, cnt, len, x, y;
|
|
int ch, didpaint, leftright_warp;
|
|
char *p;
|
|
|
|
#define LNO sp->lno
|
|
#define OLNO svp->olno
|
|
#define CNO sp->cno
|
|
#define OCNO svp->ocno
|
|
#define SCNO svp->sc_col
|
|
|
|
didpaint = leftright_warp = 0;
|
|
svp = SVP(sp);
|
|
|
|
/*
|
|
* 1: Reformat the lines.
|
|
*
|
|
* If the lines themselves have changed (:set list, for example),
|
|
* fill in the map from scratch. Adjust the screen that's being
|
|
* displayed if the leftright flag is set.
|
|
*/
|
|
if (F_ISSET(sp, S_REFORMAT)) {
|
|
/* Invalidate the line size cache. */
|
|
SVI_SCR_CFLUSH(SVP(sp));
|
|
|
|
/* Toss svi_line() cached information. */
|
|
if (svi_sm_fill(sp, ep, HMAP->lno, P_TOP))
|
|
return (1);
|
|
if (O_ISSET(sp, O_LEFTRIGHT) &&
|
|
(cnt = svi_opt_screens(sp, ep, LNO, &CNO)) != 1)
|
|
for (smp = HMAP; smp <= TMAP; ++smp)
|
|
smp->off = cnt;
|
|
F_CLR(sp, S_REFORMAT);
|
|
F_SET(sp, S_REDRAW);
|
|
}
|
|
|
|
/*
|
|
* 2: Line movement.
|
|
*
|
|
* Line changes can cause the top line to change as well. As
|
|
* before, if the movement is large, the screen is repainted.
|
|
*
|
|
* 2a: Tiny screens.
|
|
*
|
|
* Tiny screens cannot be permitted into the "scrolling" parts of
|
|
* the smap code for two reasons. If the screen size is 1 line,
|
|
* HMAP == TMAP and the code will quickly drop core. If the screen
|
|
* size is 2, none of the divisions by 2 will work, and scrolling
|
|
* won't work. In fact, because no line change will be less than
|
|
* HALFTEXT(sp), we always ending up "filling" the map, with a
|
|
* P_MIDDLE flag, which isn't what the user wanted. Tiny screens
|
|
* can go into the "fill" portions of the smap code, however.
|
|
*/
|
|
if (sp->t_rows <= 2) {
|
|
if (LNO < HMAP->lno) {
|
|
if (svi_sm_fill(sp, ep, LNO, P_TOP))
|
|
return (1);
|
|
} else if (LNO > TMAP->lno)
|
|
if (svi_sm_fill(sp, ep, LNO, P_BOTTOM))
|
|
return (1);
|
|
if (sp->t_rows == 1) {
|
|
HMAP->off = svi_opt_screens(sp, ep, LNO, &CNO);
|
|
goto paint;
|
|
}
|
|
F_SET(sp, S_REDRAW);
|
|
goto adjust;
|
|
}
|
|
|
|
/*
|
|
* 2b: Small screens.
|
|
*
|
|
* Users can use the window, w300, w1200 and w9600 options to make
|
|
* the screen artificially small. The behavior of these options
|
|
* in the historic vi wasn't all that consistent, and, in fact, it
|
|
* was never documented how various screen movements affected the
|
|
* screen size. Generally, one of three things would happen:
|
|
* 1: The screen would expand in size, showing the line
|
|
* 2: The screen would scroll, showing the line
|
|
* 3: The screen would compress to its smallest size and
|
|
* repaint.
|
|
* In general, scrolling didn't cause compression (200^D was handled
|
|
* the same as ^D), movement to a specific line would (:N where N
|
|
* was 1 line below the screen caused a screen compress), and cursor
|
|
* movement would scroll if it was 11 lines or less, and compress if
|
|
* it was more than 11 lines. (And, no, I have no idea where the 11
|
|
* comes from.)
|
|
*
|
|
* What we do is try and figure out if the line is less than half of
|
|
* a full screen away. If it is, we expand the screen if there's
|
|
* room, and then scroll as necessary. The alternative is to compress
|
|
* and repaint.
|
|
*
|
|
* !!!
|
|
* This code is a special case from beginning to end. Unfortunately,
|
|
* home modems are still slow enough that it's worth having.
|
|
*
|
|
* XXX
|
|
* If the line a really long one, i.e. part of the line is on the
|
|
* screen but the column offset is not, we'll end up in the adjust
|
|
* code, when we should probably have compressed the screen.
|
|
*/
|
|
if (ISSMALLSCREEN(sp))
|
|
if (LNO < HMAP->lno) {
|
|
lcnt = svi_sm_nlines(sp, ep, HMAP, LNO, sp->t_maxrows);
|
|
if (lcnt <= HALFSCREEN(sp))
|
|
for (; lcnt && sp->t_rows != sp->t_maxrows;
|
|
--lcnt, ++sp->t_rows) {
|
|
++TMAP;
|
|
if (svi_sm_1down(sp, ep))
|
|
return (1);
|
|
}
|
|
else
|
|
goto small_fill;
|
|
} else if (LNO > TMAP->lno) {
|
|
lcnt = svi_sm_nlines(sp, ep, TMAP, LNO, sp->t_maxrows);
|
|
if (lcnt <= HALFSCREEN(sp))
|
|
for (; lcnt && sp->t_rows != sp->t_maxrows;
|
|
--lcnt, ++sp->t_rows) {
|
|
if (svi_sm_next(sp, ep, TMAP, TMAP + 1))
|
|
return (1);
|
|
++TMAP;
|
|
if (svi_line(sp, ep, TMAP, NULL, NULL))
|
|
return (1);
|
|
}
|
|
else {
|
|
small_fill: MOVE(sp, INFOLINE(sp), 0);
|
|
clrtoeol();
|
|
for (; sp->t_rows > sp->t_minrows;
|
|
--sp->t_rows, --TMAP) {
|
|
MOVE(sp, TMAP - HMAP, 0);
|
|
clrtoeol();
|
|
}
|
|
if (svi_sm_fill(sp, ep, LNO, P_FILL))
|
|
return (1);
|
|
F_SET(sp, S_REDRAW);
|
|
goto adjust;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 3a: Line down, or current screen.
|
|
*/
|
|
if (LNO >= HMAP->lno) {
|
|
/* Current screen. */
|
|
if (LNO <= TMAP->lno)
|
|
goto adjust;
|
|
|
|
/*
|
|
* If less than half a screen above the line, scroll down
|
|
* until the line is on the screen.
|
|
*/
|
|
lcnt = svi_sm_nlines(sp, ep, TMAP, LNO, HALFTEXT(sp));
|
|
if (lcnt < HALFTEXT(sp)) {
|
|
while (lcnt--)
|
|
if (svi_sm_1up(sp, ep))
|
|
return (1);
|
|
goto adjust;
|
|
}
|
|
goto bottom;
|
|
}
|
|
|
|
/*
|
|
* 3b: Line up.
|
|
*/
|
|
lcnt = svi_sm_nlines(sp, ep, HMAP, LNO, HALFTEXT(sp));
|
|
if (lcnt < HALFTEXT(sp)) {
|
|
/*
|
|
* If less than half a screen below the line, scroll up until
|
|
* the line is the first line on the screen. Special check so
|
|
* that if the screen has been emptied, we refill it.
|
|
*/
|
|
if (file_gline(sp, ep, HMAP->lno, &len) != NULL) {
|
|
while (lcnt--)
|
|
if (svi_sm_1down(sp, ep))
|
|
return (1);
|
|
goto adjust;
|
|
}
|
|
|
|
/*
|
|
* If less than a full screen from the bottom of the file,
|
|
* put the last line of the file on the bottom of the screen.
|
|
*/
|
|
bottom: if (file_lline(sp, ep, &lastline))
|
|
return (1);
|
|
tmp.lno = LNO;
|
|
tmp.off = 1;
|
|
lcnt = svi_sm_nlines(sp, ep, &tmp, lastline, sp->t_rows);
|
|
if (lcnt < sp->t_rows) {
|
|
if (svi_sm_fill(sp, ep, lastline, P_BOTTOM))
|
|
return (1);
|
|
F_SET(sp, S_REDRAW);
|
|
goto adjust;
|
|
}
|
|
/* It's not close, just put the line in the middle. */
|
|
goto middle;
|
|
}
|
|
|
|
/*
|
|
* If less than half a screen from the top of the file, put the first
|
|
* line of the file at the top of the screen. Otherwise, put the line
|
|
* in the middle of the screen.
|
|
*/
|
|
tmp.lno = 1;
|
|
tmp.off = 1;
|
|
lcnt = svi_sm_nlines(sp, ep, &tmp, LNO, HALFTEXT(sp));
|
|
if (lcnt < HALFTEXT(sp)) {
|
|
if (svi_sm_fill(sp, ep, 1, P_TOP))
|
|
return (1);
|
|
} else
|
|
middle: if (svi_sm_fill(sp, ep, LNO, P_MIDDLE))
|
|
return (1);
|
|
F_SET(sp, S_REDRAW);
|
|
|
|
/*
|
|
* At this point we know part of the line is on the screen. Since
|
|
* scrolling is done using logical lines, not physical, all of the
|
|
* line may not be on the screen. While that's not necessarily bad,
|
|
* if the part the cursor is on isn't there, we're going to lose.
|
|
* This can be tricky; if the line covers the entire screen, lno
|
|
* may be the same as both ends of the map, that's why we test BOTH
|
|
* the top and the bottom of the map. This isn't a problem for
|
|
* left-right scrolling, the cursor movement code handles the problem.
|
|
*
|
|
* There's a performance issue here if editing *really* long lines.
|
|
* This gets to the right spot by scrolling, and, in a binary, by
|
|
* scrolling hundreds of lines. If the adjustment looks like it's
|
|
* going to be a serious problem, refill the screen and repaint.
|
|
*/
|
|
adjust: if (!O_ISSET(sp, O_LEFTRIGHT) &&
|
|
(LNO == HMAP->lno || LNO == TMAP->lno)) {
|
|
cnt = svi_opt_screens(sp, ep, LNO, &CNO);
|
|
if (LNO == HMAP->lno && cnt < HMAP->off)
|
|
if ((HMAP->off - cnt) > HALFTEXT(sp)) {
|
|
HMAP->off = cnt;
|
|
svi_sm_fill(sp, ep, OOBLNO, P_TOP);
|
|
F_SET(sp, S_REDRAW);
|
|
} else
|
|
while (cnt < HMAP->off)
|
|
if (svi_sm_1down(sp, ep))
|
|
return (1);
|
|
if (LNO == TMAP->lno && cnt > TMAP->off)
|
|
if ((cnt - TMAP->off) > HALFTEXT(sp)) {
|
|
TMAP->off = cnt;
|
|
svi_sm_fill(sp, ep, OOBLNO, P_BOTTOM);
|
|
F_SET(sp, S_REDRAW);
|
|
} else
|
|
while (cnt > TMAP->off)
|
|
if (svi_sm_1up(sp, ep))
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* If the screen needs to be repainted, skip cursor optimization.
|
|
* However, in the code above we skipped leftright scrolling on
|
|
* the grounds that the cursor code would handle it. Make sure
|
|
* the right screen is up.
|
|
*/
|
|
if (F_ISSET(sp, S_REDRAW)) {
|
|
if (O_ISSET(sp, O_LEFTRIGHT)) {
|
|
cnt = svi_opt_screens(sp, ep, LNO, &CNO);
|
|
if (HMAP->off != cnt)
|
|
for (smp = HMAP; smp <= TMAP; ++smp)
|
|
smp->off = cnt;
|
|
}
|
|
goto paint;
|
|
}
|
|
|
|
/*
|
|
* 4: Cursor movements.
|
|
*
|
|
* Decide cursor position. If the line has changed, the cursor has
|
|
* moved over a tab, or don't know where the cursor was, reparse the
|
|
* line. Otherwise, we've just moved over fixed-width characters,
|
|
* and can calculate the left/right scrolling and cursor movement
|
|
* without reparsing the line. Note that we don't know which (if any)
|
|
* of the characters between the old and new cursor positions changed.
|
|
*
|
|
* XXX
|
|
* With some work, it should be possible to handle tabs quickly, at
|
|
* least in obvious situations, like moving right and encountering
|
|
* a tab, without reparsing the whole line.
|
|
*/
|
|
|
|
/* If the line we're working with has changed, reparse. */
|
|
if (F_ISSET(SVP(sp), SVI_CUR_INVALID) || LNO != OLNO) {
|
|
F_CLR(SVP(sp), SVI_CUR_INVALID);
|
|
goto slow;
|
|
}
|
|
|
|
/* Otherwise, if nothing's changed, go fast. */
|
|
if (CNO == OCNO)
|
|
goto fast;
|
|
|
|
/*
|
|
* Get the current line. If this fails, we either have an empty
|
|
* file and can just repaint, or there's a real problem. This
|
|
* isn't a performance issue because there aren't any ways to get
|
|
* here repeatedly.
|
|
*/
|
|
if ((p = file_gline(sp, ep, LNO, &len)) == NULL) {
|
|
if (file_lline(sp, ep, &lastline))
|
|
return (1);
|
|
if (lastline == 0)
|
|
goto slow;
|
|
GETLINE_ERR(sp, LNO);
|
|
return (1);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/* This is just a test. */
|
|
if (CNO >= len && len != 0) {
|
|
msgq(sp, M_ERR, "Error: %s/%d: cno (%u) >= len (%u)",
|
|
tail(__FILE__), __LINE__, CNO, len);
|
|
return (1);
|
|
}
|
|
#endif
|
|
/*
|
|
* The basic scheme here is to look at the characters in between
|
|
* the old and new positions and decide how big they are on the
|
|
* screen, and therefore, how many screen positions to move.
|
|
*/
|
|
if (CNO < OCNO) {
|
|
/*
|
|
* 4a: Cursor moved left.
|
|
*
|
|
* Point to the old character. The old cursor position can
|
|
* be past EOL if, for example, we just deleted the rest of
|
|
* the line. In this case, since we don't know the width of
|
|
* the characters we traversed, we have to do it slowly.
|
|
*/
|
|
p += OCNO;
|
|
cnt = (OCNO - CNO) + 1;
|
|
if (OCNO >= len)
|
|
goto slow;
|
|
|
|
/*
|
|
* Quick sanity check -- it's hard to figure out exactly when
|
|
* we cross a screen boundary as we do in the cursor right
|
|
* movement. If cnt is so large that we're going to cross the
|
|
* boundary no matter what, stop now.
|
|
*/
|
|
if (SCNO + 1 + MAX_CHARACTER_COLUMNS < cnt)
|
|
goto lscreen;
|
|
|
|
/*
|
|
* Count up the widths of the characters. If it's a tab
|
|
* character, go do it the the slow way.
|
|
*/
|
|
for (cwtotal = 0; cnt--; cwtotal += KEY_LEN(sp, ch))
|
|
if ((ch = *(u_char *)p--) == '\t')
|
|
goto slow;
|
|
|
|
/*
|
|
* Decrement the screen cursor by the total width of the
|
|
* characters minus 1.
|
|
*/
|
|
cwtotal -= 1;
|
|
|
|
/*
|
|
* If we're moving left, and there's a wide character in the
|
|
* current position, go to the end of the character.
|
|
*/
|
|
if (KEY_LEN(sp, ch) > 1)
|
|
cwtotal -= KEY_LEN(sp, ch) - 1;
|
|
|
|
/*
|
|
* If the new column moved us off of the current logical line,
|
|
* calculate a new one. If doing leftright scrolling, we've
|
|
* moved off of the current screen, as well. Since most files
|
|
* don't have more than two screens, we optimize moving from
|
|
* screen 2 to screen 1.
|
|
*/
|
|
if (SCNO < cwtotal) {
|
|
lscreen: if (O_ISSET(sp, O_LEFTRIGHT)) {
|
|
cnt = HMAP->off == 2 ? 1 :
|
|
svi_opt_screens(sp, ep, LNO, &CNO);
|
|
for (smp = HMAP; smp <= TMAP; ++smp)
|
|
smp->off = cnt;
|
|
leftright_warp = 1;
|
|
goto paint;
|
|
}
|
|
goto slow;
|
|
}
|
|
SCNO -= cwtotal;
|
|
} else {
|
|
/*
|
|
* 4b: Cursor moved right.
|
|
*
|
|
* Point to the first character to the right.
|
|
*/
|
|
p += OCNO + 1;
|
|
cnt = CNO - OCNO;
|
|
|
|
/*
|
|
* Count up the widths of the characters. If it's a tab
|
|
* character, go do it the the slow way. If we cross a
|
|
* screen boundary, we can quit.
|
|
*/
|
|
for (cwtotal = SCNO; cnt--;) {
|
|
if ((ch = *(u_char *)p++) == '\t')
|
|
goto slow;
|
|
if ((cwtotal += KEY_LEN(sp, ch)) >= SCREEN_COLS(sp))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Increment the screen cursor by the total width of the
|
|
* characters.
|
|
*/
|
|
SCNO = cwtotal;
|
|
|
|
/* See screen change comment in section 4a. */
|
|
if (SCNO >= SCREEN_COLS(sp)) {
|
|
if (O_ISSET(sp, O_LEFTRIGHT)) {
|
|
cnt = svi_opt_screens(sp, ep, LNO, &CNO);
|
|
for (smp = HMAP; smp <= TMAP; ++smp)
|
|
smp->off = cnt;
|
|
leftright_warp = 1;
|
|
goto paint;
|
|
}
|
|
goto slow;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 4c: Fast cursor update.
|
|
*
|
|
* Retrieve the current cursor position, and correct it
|
|
* for split screens.
|
|
*/
|
|
fast: getyx(stdscr, y, x);
|
|
y -= sp->woff;
|
|
goto number;
|
|
|
|
/*
|
|
* 4d: Slow cursor update.
|
|
*
|
|
* Walk through the map and find the current line. If doing left-right
|
|
* scrolling and the cursor movement has changed the screen displayed,
|
|
* scroll the screen left or right, unless we're updating the info line
|
|
* in which case we just scroll that one line. Then update the screen
|
|
* lines for this file line until we have a new screen cursor position.
|
|
*/
|
|
slow: for (smp = HMAP; smp->lno != LNO; ++smp);
|
|
if (O_ISSET(sp, O_LEFTRIGHT)) {
|
|
cnt = svi_opt_screens(sp, ep, LNO, &CNO) % SCREEN_COLS(sp);
|
|
if (cnt != HMAP->off) {
|
|
if (ISINFOLINE(sp, smp))
|
|
smp->off = cnt;
|
|
else {
|
|
for (smp = HMAP; smp <= TMAP; ++smp)
|
|
smp->off = cnt;
|
|
leftright_warp = 1;
|
|
}
|
|
goto paint;
|
|
}
|
|
}
|
|
for (y = -1; smp <= TMAP && smp->lno == LNO; ++smp) {
|
|
if (svi_line(sp, ep, smp, &y, &SCNO))
|
|
return (1);
|
|
if (y != -1)
|
|
break;
|
|
}
|
|
goto number;
|
|
|
|
/*
|
|
* 5: Repaint the entire screen.
|
|
*
|
|
* Lost big, do what you have to do. We flush the cache as S_REDRAW
|
|
* gets set when the screen isn't worth fixing, and it's simpler to
|
|
* repaint. So, don't trust anything that we think we know about it.
|
|
*/
|
|
paint: for (smp = HMAP; smp <= TMAP; ++smp)
|
|
SMAP_FLUSH(smp);
|
|
for (smp = HMAP; smp <= TMAP; ++smp)
|
|
if (svi_line(sp, ep, smp, &y, &SCNO))
|
|
return (1);
|
|
/*
|
|
* If it's a small screen and we're redrawing, clear the unused lines,
|
|
* ex may have overwritten them.
|
|
*/
|
|
if (F_ISSET(sp, S_REDRAW)) {
|
|
if (ISSMALLSCREEN(sp))
|
|
for (cnt = sp->t_rows; cnt <= sp->t_maxrows; ++cnt) {
|
|
MOVE(sp, cnt, 0);
|
|
clrtoeol();
|
|
}
|
|
F_CLR(sp, S_REDRAW);
|
|
}
|
|
|
|
didpaint = 1;
|
|
|
|
/*
|
|
* 6: Repaint the line numbers.
|
|
*
|
|
* If O_NUMBER is set and the S_RENUMBER bit is set, and we didn't
|
|
* repaint the screen, repaint all of the line numbers, they've
|
|
* changed.
|
|
*/
|
|
number: if (O_ISSET(sp, O_NUMBER) && F_ISSET(sp, S_RENUMBER) && !didpaint) {
|
|
if (svi_number(sp, ep))
|
|
return (1);
|
|
F_CLR(sp, S_RENUMBER);
|
|
}
|
|
|
|
/*
|
|
* 7: Refresh the screen.
|
|
*
|
|
* If the screen was corrupted, refresh it.
|
|
*/
|
|
if (F_ISSET(sp, S_REFRESH)) {
|
|
wrefresh(curscr);
|
|
F_CLR(sp, S_REFRESH);
|
|
}
|
|
|
|
if (F_ISSET(sp, S_BELLSCHED))
|
|
svi_bell(sp);
|
|
/*
|
|
* If the bottom line isn't in use by the colon command, and
|
|
* we're not in the middle of a map:
|
|
*
|
|
* Display any messages. Don't test S_UPDATE_MODE. The
|
|
* message printing routine set it to avoid anyone else
|
|
* destroying the message we're about to display.
|
|
*
|
|
* If the bottom line isn't in use by anyone, put out the
|
|
* standard status line.
|
|
*/
|
|
if (!F_ISSET(SVP(sp), SVI_INFOLINE) && !KEYS_WAITING(sp))
|
|
if (sp->msgq.lh_first != NULL &&
|
|
!F_ISSET(sp->msgq.lh_first, M_EMPTY))
|
|
svi_msgflush(sp);
|
|
else if (!F_ISSET(sp, S_UPDATE_MODE))
|
|
svi_modeline(sp, ep);
|
|
|
|
/* Update saved information. */
|
|
OCNO = CNO;
|
|
OLNO = LNO;
|
|
|
|
/* Place the cursor. */
|
|
MOVE(sp, y, SCNO);
|
|
|
|
/* Flush it all out. */
|
|
refresh();
|
|
|
|
/*
|
|
* XXX
|
|
* Recalculate the "most favorite" cursor position. Vi doesn't know
|
|
* that we've warped the screen and it's going to have a completely
|
|
* wrong idea about where the cursor should be. This is vi's problem,
|
|
* and fixing it here is a gross violation of layering.
|
|
*/
|
|
if (leftright_warp)
|
|
(void)svi_column(sp, ep, &sp->rcm);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* svi_modeline --
|
|
* Update the mode line.
|
|
*/
|
|
static int
|
|
svi_modeline(sp, ep)
|
|
SCR *sp;
|
|
EXF *ep;
|
|
{
|
|
size_t cols, curlen, endpoint, len, midpoint;
|
|
char *p, buf[20];
|
|
|
|
/* Clear the mode line. */
|
|
MOVE(sp, INFOLINE(sp), 0);
|
|
clrtoeol();
|
|
|
|
/*
|
|
* We put down the file name, the ruler, the mode and the dirty flag.
|
|
* If there's not enough room, there's not enough room, we don't play
|
|
* any special games. We try to put the ruler in the middle and the
|
|
* mode and dirty flag at the end.
|
|
*
|
|
* !!!
|
|
* Leave the last character blank, in case it's a really dumb terminal
|
|
* with hardware scroll. Second, don't paint the last character in the
|
|
* screen, SunOS 4.1.1 and Ultrix 4.2 curses won't let you.
|
|
*/
|
|
cols = sp->cols - 1;
|
|
|
|
curlen = 0;
|
|
if (sp->q.cqe_next != (void *)&sp->gp->dq) {
|
|
for (p = sp->frp->name; *p != '\0'; ++p);
|
|
while (--p > sp->frp->name) {
|
|
if (*p == '/') {
|
|
++p;
|
|
break;
|
|
}
|
|
if ((curlen += KEY_LEN(sp, *p)) > cols) {
|
|
curlen -= KEY_LEN(sp, *p);
|
|
++p;
|
|
break;
|
|
}
|
|
}
|
|
|
|
MOVE(sp, INFOLINE(sp), 0);
|
|
standout();
|
|
for (; *p != '\0'; ++p)
|
|
ADDCH(*p);
|
|
standend();
|
|
}
|
|
|
|
/*
|
|
* Display the ruler. If we're not at the midpoint yet, move there.
|
|
* Otherwise, just add in two extra spaces.
|
|
*
|
|
* XXX
|
|
* Assume that numbers, commas, and spaces only take up a single
|
|
* column on the screen.
|
|
*/
|
|
if (O_ISSET(sp, O_RULER)) {
|
|
len = snprintf(buf,
|
|
sizeof(buf), "%lu,%lu", sp->lno, sp->cno + 1);
|
|
midpoint = (cols - ((len + 1) / 2)) / 2;
|
|
if (curlen < midpoint) {
|
|
MOVE(sp, INFOLINE(sp), midpoint);
|
|
ADDSTR(buf);
|
|
curlen += len;
|
|
} else if (curlen + 2 + len < cols) {
|
|
ADDSTR(" ");
|
|
ADDSTR(buf);
|
|
curlen += 2 + len;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Display the mode and the modified flag, as close to the end of the
|
|
* line as possible, but guaranteeing at least two spaces between the
|
|
* ruler and the modified flag.
|
|
*
|
|
* XXX
|
|
* Assume that mode name characters, asterisks, and spaces only take
|
|
* up a single column on the screen.
|
|
*/
|
|
endpoint = cols;
|
|
if (O_ISSET(sp, O_SHOWDIRTY) && F_ISSET(ep, F_MODIFIED))
|
|
--endpoint;
|
|
|
|
#define MODESIZE 9
|
|
if (O_ISSET(sp, O_SHOWMODE))
|
|
endpoint -= MAX_MODE_NAME;
|
|
|
|
if (endpoint < curlen + 2)
|
|
return (0);
|
|
|
|
MOVE(sp, INFOLINE(sp), endpoint);
|
|
if (O_ISSET(sp, O_SHOWDIRTY) && F_ISSET(ep, F_MODIFIED))
|
|
ADDSTR("*");
|
|
if (O_ISSET(sp, O_SHOWMODE))
|
|
ADDSTR(sp->showmode);
|
|
return (0);
|
|
}
|