4.3BSD-Tahoe/usr/src/new/jove/disp.c
/***************************************************************************
* This program is Copyright (C) 1986, 1987, 1988 by Jonathan Payne. JOVE *
* is provided to you without charge, and with no warranty. You may give *
* away copies of JOVE, including sources, provided that this notice is *
* included in all the files. *
***************************************************************************/
#include "jove.h"
#include "ctype.h"
#include "termcap.h"
#ifdef MAC
# include "mac.h"
#else
# include <varargs.h>
# include <sys/stat.h>
#endif
#include <signal.h>
#ifdef MAC
# undef private
# define private
#endif
#ifdef LINT_ARGS
private void
#ifdef ID_CHAR
DeTab(int, char *, char *, int, int),
DelChar(int, int, int),
InsChar(int, int, int, char *),
#endif
DoIDline(int),
do_cl_eol(int),
ModeLine(Window *),
mode_app(char *),
GotoDot(void),
UpdLine(int),
UpdWindow(Window *, int);
private int
AddLines(int, int),
DelLines(int, int),
UntilEqual(int);
#else
private void
#ifdef ID_CHAR
DeTab(),
DelChar(),
InsChar(),
#endif
DoIDline(),
do_cl_eol(),
GotoDot(),
ModeLine(),
mode_app(),
UpdLine(),
UpdWindow();
private int
AddLines(),
DelLines(),
UntilEqual();
#endif /* LINT_ARGS */
#ifdef MAC
# undef private
# define private static
#endif
int DisabledRedisplay = NO;
/* Kludge windows gets called by the routines that delete lines from the
buffer. If the w->w_line or w->w_top are deleted and this procedure
is not called, the redisplay routine will barf. */
void
ChkWindows(line1, line2)
Line *line1;
register Line *line2;
{
register Window *w = fwind;
register Line *lp;
do {
for (lp = line1->l_next; lp != line2->l_next; lp = lp->l_next) {
if (lp == w->w_top)
w->w_flags |= W_TOPGONE;
if (lp == w->w_line)
w->w_flags |= W_CURGONE;
}
w = w->w_next;
} while (w != fwind);
}
extern int RingBell;
void
redisplay()
{
extern int AbortCnt;
register Window *w = fwind;
int lineno,
done_ID = NO,
i;
register struct scrimage *des_p,
*phys_p;
if (DisabledRedisplay == YES)
return;
curwind->w_line = curwind->w_bufp->b_dot;
curwind->w_char = curwind->w_bufp->b_char;
#ifdef MAC
InputPending = 0;
#else
if (InputPending = charp()) /* calls CheckEvent, which could */
return; /* result in a call to rediplay(). We don't want that. */
#endif
#ifdef JOB_CONTROL
if (UpdFreq)
sighold(SIGALRM);
#endif
if (RingBell) {
dobell(1);
RingBell = 0;
}
AbortCnt = BufSize; /* initialize this now */
if (UpdMesg)
DrawMesg(YES);
for (lineno = 0, w = fwind; lineno < ILI; w = w->w_next) {
UpdWindow(w, lineno);
lineno += w->w_height;
}
UpdModLine = 0; /* Now that we've called update window, we can
assume that the modeline will be updated. But
if while redrawing the modeline the user types
a character, ModeLine() is free to set this on
again so that the modeline will be fully drawn
at the next redisplay. */
des_p = DesiredScreen;
phys_p = PhysScreen;
for (i = 0; i < ILI; i++, des_p++, phys_p++) {
if (!done_ID && (des_p->s_id != phys_p->s_id)) {
DoIDline(i);
done_ID = YES;
}
if ((des_p->s_flags & (DIRTY | L_MOD)) ||
(des_p->s_id != phys_p->s_id) ||
(des_p->s_vln != phys_p->s_vln) ||
(des_p->s_offset != phys_p->s_offset))
UpdLine(i);
if (InputPending)
goto ret;
}
if (Asking) {
Placur(LI - 1, min(CO - 2, calc_pos(mesgbuf, Asking)));
/* Nice kludge */
flusho();
} else
GotoDot();
ret:
#ifdef JOB_CONTROL
if (UpdFreq)
sigrelse(SIGALRM);
#else
; /* yuck */
#endif
#ifdef MAC
if(Windchange) docontrols();
#endif /* MAC */
}
#ifndef IBMPC
private void
dobell(n)
{
while (--n >= 0) {
#ifndef MAC
if (VisBell && VB)
putstr(VB);
else
putpad(BL, 1);
#else
SysBeep(5);
#endif
}
flusho();
}
#endif /* IBMPC */
/* find_pos() returns the position on the line, that C_CHAR represents
in LINE */
int
find_pos(line, c_char)
Line *line;
{
return calc_pos(lcontents(line), c_char);
}
int
calc_pos(lp, c_char)
register char *lp;
register int c_char;
{
register int pos = 0;
register int c;
while ((--c_char >= 0) && ((c = *lp++) & CHARMASK) != 0) {
if (c == '\t')
pos += (tabstop - (pos % tabstop));
else if (isctrl(c))
pos += 2;
else
pos += 1;
}
return pos;
}
int UpdModLine = 0,
UpdMesg = 0,
CanScroll = 0;
private void
DoIDline(start)
{
register struct scrimage *des_p = &DesiredScreen[start];
struct scrimage *phys_p = &PhysScreen[start];
register int i,
j;
/* Some changes have been made. Try for insert or delete lines.
If either case has happened, Addlines and/or DelLines will do
necessary scrolling, also CONVERTING PhysScreen to account for the
physical changes. The comparison continues from where the
insertion/deletion takes place; this doesn't happen very often,
usually it happens with more than one window with the same
buffer. */
if (!CanScroll)
return; /* We should never have been called! */
for (i = start; i < ILI; i++, des_p++, phys_p++)
if (des_p->s_id != phys_p->s_id)
break;
for (; i < ILI; i++) {
for (j = i + 1; j < ILI; j++) {
des_p = &DesiredScreen[j];
phys_p = &PhysScreen[j];
if (des_p->s_id != 0 && des_p->s_id == phys_p->s_id)
break;
if (des_p->s_id == PhysScreen[i].s_id) {
if (des_p->s_id == 0)
continue;
if (AddLines(i, j - i)) {
DoIDline(j);
return;
}
break;
}
if ((des_p = &DesiredScreen[i])->s_id == phys_p->s_id) {
if (des_p->s_id == 0)
continue;
if (DelLines(i, j - i)) {
DoIDline(i);
return;
}
break;
}
}
}
}
/* Make DesiredScreen reflect what the screen should look like when we are done
with the redisplay. This deals with horizontal scrolling. Also makes
sure the current line of the Window is in the window. */
int ScrollAll = NO;
private void
UpdWindow(w, start)
register Window *w;
{
Line *lp;
int i,
upper, /* top of window */
lower, /* bottom of window */
strt_col, /* starting print column of current line */
ntries = 0; /* # of tries at updating window */
register struct scrimage *des_p,
*phys_p;
Buffer *bp = w->w_bufp;
retry:
if (w->w_flags & W_CURGONE) {
w->w_line = bp->b_dot;
w->w_char = bp->b_char;
}
if (w->w_flags & W_TOPGONE)
CentWind(w); /* reset topline of screen */
w->w_flags &= ~(W_CURGONE | W_TOPGONE);
/* make sure that the current line is in the window */
upper = start;
lower = upper + w->w_height - 1; /* don't include modeline */
for (i = upper, lp = w->w_top; i < lower && lp != 0; lp = lp->l_next, i++)
if (lp == w->w_line)
break;
if (i == lower || lp == 0) {
ntries += 1;
if (ntries == 1) {
CalcWind(w);
goto retry;
} else if (ntries == 2) {
w->w_top = w->w_line = w->w_bufp->b_first;
printf("\rERROR in redisplay: I got hopelessly lost!");
dobell(2);
goto retry;
} else if (ntries == 3) {
printf("\n\rOops, still lost, quitting ...\r\n");
finish(1);
}
}
/* first do some calculations for the current line */
{
int diff = (w->w_flags & W_NUMLINES) ? 8 : 0,
end_col;
strt_col = (ScrollAll == YES) ? w->w_LRscroll :
PhysScreen[i].s_offset;
end_col = strt_col + (CO - 2) - diff;
/* Right now we are displaying from strt_col to
end_col of the buffer line. These are PRINT
columns, not actual characters. */
w->w_dotcol = find_pos(w->w_line, w->w_char);
/* if the new dotcol is out of range, reselect
a horizontal window */
if ((PhysScreen[i].s_offset == -1) ||
(w->w_dotcol < strt_col) ||
(w->w_dotcol >= end_col)) {
if (w->w_dotcol < ((CO - 2) - diff))
strt_col = 0;
else
strt_col = w->w_dotcol - (CO / 2);
if (ScrollAll == YES) {
if (w->w_LRscroll != strt_col)
UpdModLine = YES;
w->w_LRscroll = strt_col;
}
}
w->w_dotline = i;
w->w_dotcol += diff;
}
des_p = &DesiredScreen[upper];
phys_p = &PhysScreen[upper];
for (i = upper, lp = w->w_top; lp != 0 && i < lower; i++, des_p++, phys_p++, lp = lp->l_next) {
des_p->s_window = w;
des_p->s_lp = lp;
des_p->s_id = lp->l_dline & ~DIRTY;
des_p->s_flags = isdirty(lp) ? L_MOD : 0;
if (w->w_flags & W_NUMLINES)
des_p->s_vln = w->w_topnum + (i - upper);
else
des_p->s_vln = 0;
if (lp == w->w_line)
des_p->s_offset = strt_col;
else
des_p->s_offset = w->w_LRscroll;
}
/* Is structure assignment faster than copy each field separately? */
if (i < lower) {
static struct scrimage dirty_plate = { 0, DIRTY, 0, 0, 0, 0 },
clean_plate = { 0, 0, 0, 0, 0, 0 };
for (; i < lower; i++, des_p++, phys_p++)
if (phys_p->s_id != 0)
*des_p = dirty_plate;
else
*des_p = clean_plate;
}
des_p->s_window = w;
des_p->s_flags = 0;
if (((des_p->s_id = (int) w->w_bufp) != phys_p->s_id) || UpdModLine)
des_p->s_flags = MODELINE | DIRTY;
#ifdef MAC
if(UpdModLine) Modechange = 1;
if(w == curwind && w->w_control) SetScrollBar(w->w_control);
#endif
}
/* Write whatever is in mesgbuf (maybe we are Asking, or just printed
a message). Turns off the UpdateMesg line flag. */
void
DrawMesg(abortable)
{
#ifndef MAC /* same reason as in redisplay() */
if (charp())
return;
#endif
i_set(ILI, 0);
if (swrite(mesgbuf, NO, abortable)) {
cl_eol();
UpdMesg = 0;
}
flusho();
}
/* Goto the current position in the current window. Presumably redisplay()
has already been called, and curwind->{w_dotline,w_dotcol} have been set
correctly. */
private void
GotoDot()
{
if (InputPending)
return;
Placur(curwind->w_dotline, curwind->w_dotcol -
PhysScreen[curwind->w_dotline].s_offset);
flusho();
}
private int
UntilEqual(start)
register int start;
{
register struct scrimage *des_p = &DesiredScreen[start],
*phys_p = &PhysScreen[start];
while ((start < ILI) && (des_p->s_id != phys_p->s_id)) {
des_p += 1;
phys_p += 1;
start += 1;
}
return start;
}
/* Calls the routine to do the physical changes, and changes PhysScreen to
reflect those changes. */
private int
AddLines(at, num)
register int at,
num;
{
register int i;
int bottom = UntilEqual(at + num);
if (num == 0 || num >= ((bottom - 1) - at))
return NO; /* we did nothing */
v_ins_line(num, at, bottom - 1);
/* Now change PhysScreen to account for the physical change. */
for (i = bottom - 1; i - num >= at; i--)
PhysScreen[i] = PhysScreen[i - num];
for (i = 0; i < num; i++)
PhysScreen[at + i].s_id = 0;
return YES; /* we did something */
}
private int
DelLines(at, num)
register int at,
num;
{
register int i;
int bottom = UntilEqual(at + num);
if (num == 0 || num >= ((bottom - 1) - at))
return NO;
v_del_line(num, at, bottom - 1);
for (i = at; num + i < bottom; i++)
PhysScreen[i] = PhysScreen[num + i];
for (i = bottom - num; i < bottom; i++)
PhysScreen[i].s_id = 0;
return YES;
}
/* Update line linenum in window w. Only set PhysScreen to DesiredScreen
if the swrite or cl_eol works, that is nothing is interupted by
characters typed. */
private void
UpdLine(linenum)
register int linenum;
{
register struct scrimage *des_p = &DesiredScreen[linenum];
register Window *w = des_p->s_window;
i_set(linenum, 0);
if (des_p->s_flags & MODELINE)
ModeLine(w);
else if (des_p->s_id) {
des_p->s_lp->l_dline &= ~DIRTY;
des_p->s_flags &= ~(DIRTY | L_MOD);
#ifdef ID_CHAR
if (!UseIC && (w->w_flags & W_NUMLINES))
#else
if (w->w_flags & W_NUMLINES)
#endif
(void) swrite(sprint("%6d ", des_p->s_vln), NO, YES);
#ifdef ID_CHAR
if (UseIC) {
char outbuf[MAXCOLS],
*lptr;
int fromcol = (w->w_flags & W_NUMLINES) ? 8 : 0;
if (w->w_flags & W_NUMLINES)
sprintf(outbuf, "%6d ", des_p->s_vln);
lptr = lcontents(des_p->s_lp);
DeTab(des_p->s_offset, lptr, outbuf + fromcol,
(sizeof outbuf) - 1 - fromcol,
des_p->s_window->w_flags & W_VISSPACE);
if (IDchar(outbuf, linenum, 0))
PhysScreen[linenum] = *des_p;
else if (i_set(linenum, 0), swrite(outbuf, NO, YES))
do_cl_eol(linenum);
else
PhysScreen[linenum].s_id = -1;
} else
#endif /* ID_CHAR */
if (BufSwrite(linenum))
do_cl_eol(linenum);
else
PhysScreen[linenum].s_id = -1;
} else if (PhysScreen[linenum].s_id) /* not the same ... make sure */
do_cl_eol(linenum);
}
private void
do_cl_eol(linenum)
register int linenum;
{
cl_eol();
PhysScreen[linenum] = DesiredScreen[linenum];
}
#ifdef ID_CHAR
/* From here to the end of the file is code that tries to utilize the
insert/delete character feature on some terminals. It is very confusing
and not so well written code, AND there is a lot of it. You may want
to use the space for something else. */
extern struct screenline *Screen;
int IN_INSmode = 0;
int UseIC;
int DClen,
MDClen,
IClen,
MIClen,
IMlen,
CElen;
void
disp_opt_init()
{
DClen = DC ? strlen(DC) : 0;
MDClen = M_DC ? strlen(M_DC) : 9999;
IClen = IC ? strlen(IC) : 0;
MIClen = M_IC ? strlen(M_IC) : 9999;
IMlen = IM ? strlen(IM) : 0;
CElen = CE ? strlen(CE) : 0;
UseIC = (IC || IM || M_IC);
}
void
INSmode(on)
{
if (on && !IN_INSmode) {
putpad(IM, 1);
IN_INSmode = YES;
} else if (!on && IN_INSmode) {
putpad(EI, 1);
IN_INSmode = NO;
}
}
private void
DeTab(s_offset, buf, outbuf, limit, visspace)
register char *buf;
char *outbuf;
{
register char *phys_p = outbuf,
c;
register int pos = 0;
char *limitp = &outbuf[limit];
#define OkayOut(ch) if ((pos++ >= s_offset) && (phys_p < limitp))\
*phys_p++ = ch;\
else
while (c = *buf++) {
if (c == '\t') {
int nchars = (tabstop - (pos % tabstop));
if (visspace) {
OkayOut('>');
nchars -= 1;
}
while (--nchars >= 0)
OkayOut(' ');
} else if (isctrl(c)) {
OkayOut('^');
OkayOut(c == 0177 ? '?' : c + '@');
} else {
if (visspace && c == ' ')
c = '_';
OkayOut(c);
}
if (pos - s_offset >= CO) {
phys_p = &outbuf[CO - 1];
*phys_p++ = '!';
break;
}
}
*phys_p = 0;
}
/* ID character routines full of special cases and other fun stuff like that.
It actually works though ...
Returns Non-Zero if you are finished (no differences left). */
private int
IDchar(new, lineno, col)
register char *new;
{
register int i;
int j,
oldlen,
NumSaved;
register struct screenline *sline = &Screen[lineno];
oldlen = sline->s_length - sline->s_line;
for (i = col; i < oldlen && new[i] != 0; i++)
if (sline->s_line[i] != new[i])
break;
if (new[i] == 0 || i == oldlen)
return (new[i] == 0 && i == oldlen);
for (j = i + 1; j < oldlen && new[j]; j++) {
if (new[j] == sline->s_line[i]) {
NumSaved = IDcomp(new + j, sline->s_line + i,
strlen(new)) + NumSimilar(new + i,
sline->s_line + i, j - i);
if (OkayInsert(NumSaved, j - i)) {
InsChar(lineno, i, j - i, new);
return(IDchar(new, lineno, j));
}
}
}
for (j = i + 1; j < oldlen && new[i]; j++) {
if (new[i] == sline->s_line[j]) {
NumSaved = IDcomp(new + i, sline->s_line + j,
oldlen - j);
if (OkayDelete(NumSaved, j - i, new[oldlen] == 0)) {
DelChar(lineno, i, j - i);
return(IDchar(new, lineno, j));
}
}
}
return 0;
}
private int
NumSimilar(s, t, n)
register char *s,
*t;
{
register int num = 0;
while (n--)
if (*s++ == *t++)
num += 1;
return num;
}
private int
IDcomp(s, t, len)
register char *s,
*t;
{
register int i;
int num = 0,
nonspace = 0;
char c;
for (i = 0; i < len; i++) {
if ((c = *s++) != *t++)
break;
if (c != ' ')
nonspace++;
if (nonspace)
num += 1;
}
return num;
}
private int
OkayDelete(Saved, num, samelength)
{
/* If the old and the new are the same length, then we don't
* have to clear to end of line. We take that into consideration.
*/
return ((Saved + (!samelength ? CElen : 0))
> min(MDClen, DClen * num));
}
private int
OkayInsert(Saved, num)
{
register int n = 0;
if (IC) /* Per character prefixes */
n = min(num * IClen, MIClen);
if (IM && !IN_INSmode) {
/* Good terminal. Fewer characters in this case */
n += IMlen;
}
n += num; /* The characters themselves */
return Saved > n;
}
extern int CapCol;
extern char *cursend;
extern struct screenline *Curline;
private void
DelChar(lineno, col, num)
{
register char *from,
*to;
register int i;
struct screenline *sp = (&Screen[lineno]);
Placur(lineno, col);
if (M_DC && num > 1) {
char minibuf[16];
sprintf(minibuf, M_DC, num);
putpad(minibuf, num);
} else {
for (i = num; --i >= 0; )
putpad(DC, 1);
}
to = sp->s_line + col;
from = to + num;
byte_copy(from, to, sp->s_length - from + 1);
clrline(sp->s_length - num, sp->s_length);
sp->s_length -= num;
}
private void
InsChar(lineno, col, num, new)
char *new;
{
register char *sp1,
*sp2, /* To push over the array. */
*sp3; /* Last character to push over. */
int i;
i_set(lineno, 0);
sp2 = Curline->s_length + num;
if (sp2 >= cursend) {
i_set(lineno, CO - num - 1);
cl_eol();
sp2 = cursend - 1;
}
Curline->s_length = sp2;
sp1 = sp2 - num;
sp3 = Curline->s_line + col;
while (sp1 >= sp3)
*sp2-- = *sp1--;
new += col;
byte_copy(new, sp3, num);
/* The internal screen is correct, and now we have to do
the physical stuff. */
Placur(lineno, col);
if (IM) {
if (!IN_INSmode)
INSmode(1);
} else if (M_IC && num > 1) {
char minibuf[16];
sprintf(minibuf, M_IC, num);
putpad(minibuf, num);
} else if (IC) {
for (i = 0; i < num; i++)
putpad(IC, 1);
}
for (i = 0; i < num; i++) {
putchar(new[i]);
if (IN_INSmode)
putpad(IP, 1);
}
CapCol += num;
}
#endif /* ID_CHAR */
#ifdef UNIX /* obviously ... no mail today if not Unix*/
/* chkmail() returns nonzero if there is new mail since the
last time we checked. */
char Mailbox[FILESIZE]; /* initialized in main */
int MailInt = 60; /* check no more often than 60 seconds */
#ifdef BIFF
int BiffChk = NO; /* whether or not to turn off biff while in JOVE */
#endif
int
chkmail(force)
{
time_t now;
static time_t last_chk = 0;
static int value = FALSE;
static off_t last_size = 0;
struct stat stbuf;
int last_val;
static time_t last_time = 0;
time(&now);
if (!force && (now < last_chk + MailInt))
return value;
last_chk = now;
if (force)
last_time = now;
if (stat(Mailbox, &stbuf) < 0) {
value = FALSE;
return FALSE;
}
last_val = value;
value = ((stbuf.st_mtime > last_time) &&
(stbuf.st_size > 0) &&
(stbuf.st_size >= last_size) &&
(stbuf.st_mtime + 5 > stbuf.st_atime));
if (value == TRUE &&
((value != last_val) || (stbuf.st_size != last_size)))
dobell(3);
if (stbuf.st_size < last_size)
last_time = now;
last_size = stbuf.st_size;
return value;
}
#endif /* UNIX */
/* Print the mode line. */
private char *mode_p,
*mend_p;
int BriteMode = 1; /* modeline should standout */
private void
mode_app(str)
register char *str;
{
if (mode_p >= mend_p)
return;
while ((mode_p < mend_p) && (*mode_p++ = *str++))
;
mode_p -= 1; /* back over the null */
}
char ModeFmt[120] = "%3c %w %[%sJOVE (%M) Buffer: %b \"%f\" %]%s%m*- %((%t)%s%)%e";
private void
ModeLine(w)
register Window *w;
{
extern int i_line;
extern char *pwd();
int n,
ign_some = NO;
char line[MAXCOLS],
*fmt = ModeFmt,
fillc,
c;
register Buffer *thisbuf = w->w_bufp;
register Buffer *bp;
mode_p = line;
mend_p = &line[(sizeof line) - 1];
#if defined(UNIX) || (defined (MSDOS) && !defined(IBMPC))
if (BriteMode != 0 && SO == 0)
BriteMode = 0;
fillc = BriteMode ? ' ' : '-';
#endif /* UNIX */
#ifdef IBMPC /* very subtle - don't mess up attributes too much */
fillc = '-'; /*BriteMode ? ' ' : '-';*/
#endif /* IBMPC */
#ifdef MAC
fillc = '_'; /* looks better on a Mac */
#endif /* MAC */
while (c = *fmt++) {
if (c != '%') {
if (c == '\\')
if ((c = *fmt++) == '\0')
break;
if (!ign_some)
*mode_p++ = c;
continue;
}
if ((c = *fmt++) == '\0') /* char after the '%' */
break;
if (ign_some && c != ')')
continue;
n = 1;
if (c >= '0' && c <= '9') {
n = 0;
while (c >= '0' && c <= '9') {
n = n * 10 + (c - '0');
c = *fmt++;
}
}
switch (c) {
case '(':
if (w->w_next != fwind) /* Not bottom window. */
ign_some = YES;
break;
case ')':
ign_some = NO;
break;
case '[':
case ']':
{
char *strs = (c == '[') ? "[[[[[[[[[[" : "]]]]]]]]]]";
mode_app(strs + 10 - RecDepth);
break;
}
#ifdef UNIX
case 'C': /* check mail here */
if (chkmail(NO))
mode_app("[New mail]");
break;
#endif /* UNIX */
case 'M':
{
static char *mmodes[] = {
"Fundamental ",
"Text ",
"C ",
#ifdef LISP
"Lisp ",
#endif
0
};
mode_app(mmodes[thisbuf->b_major]);
if (BufMinorMode(thisbuf, Fill))
mode_app("Fill ");
if (BufMinorMode(thisbuf, Abbrev))
mode_app("Abbrev ");
if (BufMinorMode(thisbuf, OverWrite))
mode_app("OvrWt ");
if (BufMinorMode(thisbuf, Indent))
mode_app("AI ");
if (InMacDefine)
mode_app("Def ");
mode_p -= 1; /* Back over the extra space. */
break;
}
case 'c':
while (--n >= 0)
*mode_p++ = fillc;
break;
#ifdef CHDIR
case 'd': /* print working directory */
mode_app(pr_name(pwd(), YES));
break;
#endif
case 'e':
{
/* 2 space pad pluss padding for magic cookies */
char *last_p = &line[CO - 2 - (2 * SG)];
while (mode_p < last_p)
*mode_p++ = fillc;
goto outahere; /* %e means we're done! */
}
case 'b':
mode_app(thisbuf->b_name);
break;
case 'f':
case 'F':
if (thisbuf->b_fname == 0)
mode_app("[No file]");
else {
if (c == 'f')
mode_app(pr_name(thisbuf->b_fname, YES));
else
mode_app(basename(thisbuf->b_fname));
}
break;
#ifdef LOAD_AV
case 'l':
{
double theavg;
char minibuf[10];
get_la(&theavg);
theavg += .005; /* round to nearest .01 */
sprintf(minibuf, "%d.%02d",
(int) theavg,
(int)((theavg - (int) theavg) * 100));
mode_app(minibuf);
break;
}
#endif
case 'm':
if (IsModified(w->w_bufp))
*mode_p++ = fmt[0];
else
*mode_p++ = fmt[1];
fmt += 2; /* skip two characters */
break;
case 'n':
{
char tmp[16];
for (bp = world, n = 1; bp != 0; bp = bp->b_next, n++)
if (bp == thisbuf)
break;
sprintf(tmp, "%d", n);
mode_app(tmp);
break;
}
#ifdef IPROCS
case 'p':
if (thisbuf->b_type == B_PROCESS) {
char tmp[40];
sprintf(tmp, "(%s)", (thisbuf->b_process == 0) ?
"No process" :
pstate(thisbuf->b_process));
mode_app(tmp);
break;
}
#endif
case 's':
if (mode_p[-1] == ' ')
continue;
*mode_p++ = ' ';
break;
case 't':
{
char timestr[12];
mode_app(get_time((time_t *) 0, timestr, 11, 16));
break;
}
case 'w':
if (w->w_LRscroll > 0)
mode_app(">");
}
}
outahere:
*mode_p = 0;
/* Highlight mode line. */
if (BriteMode) {
#ifdef ID_CHAR
if (IN_INSmode)
INSmode(0);
#endif
#ifdef TERMCAP
putpad(SO, 1);
#else
SO_on();
#endif /* TERMCAP */
}
if (swrite(line, BriteMode, YES))
do_cl_eol(i_line);
else
UpdModLine = 1;
if (BriteMode)
#ifdef TERMCAP
putpad(SE, 1);
#else
SO_off();
#endif /* TERMCAP */
}
/* This tries to place the current line of the current window in the
center of the window, OR to place it at the arg'th line of the window.
This also causes the horizontal position of the line to be centered,
if the line needs scrolling, or moved all the way back to the left,
if that's possible. */
void
RedrawDisplay()
{
int line;
Line *newtop = prev_line((curwind->w_line = curline), is_an_arg() ?
arg_value() : HALF(curwind));
if ((line = in_window(curwind, curwind->w_line)) != -1)
PhysScreen[line].s_offset = -1;
if (newtop == curwind->w_top)
v_clear(FLine(curwind), FLine(curwind) + SIZE(curwind));
else
SetTop(curwind, newtop);
}
void
v_clear(line1, line2)
register int line1;
{
register struct scrimage *phys_p, *des_p;
phys_p = &PhysScreen[line1];
des_p = &DesiredScreen[line1];
while (line1 <= line2) {
i_set(line1, 0);
cl_eol();
phys_p->s_id = des_p->s_id = 0;
phys_p += 1;
des_p += 1;
line1 += 1;
}
}
void
ClAndRedraw()
{
cl_scr(YES);
}
void
NextPage()
{
Line *newline;
if (Asking)
return;
if (arg_value() < 0) {
negate_arg_value();
PrevPage();
return;
}
if (arg_type() == YES)
UpScroll();
else {
if (in_window(curwind, curwind->w_bufp->b_last) != -1) {
rbell();
return;
}
newline = next_line(curwind->w_top, max(1, SIZE(curwind) - 1));
SetTop(curwind, curwind->w_line = newline);
if (curwind->w_bufp == curbuf)
SetLine(newline);
}
}
#ifdef MSDOS /* kg */
void
PageScrollUp()
{
int i, n;
n = max(1, SIZE(curwind) - 1);
for (i=0; i<n; i++) {
UpScroll();
redisplay();
}
}
void
PageScrollDown()
{
int i, n;
n = max(1, SIZE(curwind) - 1);
for (i=0; i<n; i++) {
DownScroll();
redisplay();
}
}
#endif /* MSDOS */
void
PrevPage()
{
Line *newline;
if (Asking)
return;
if (arg_value() < 0) {
negate_arg_value();
NextPage();
return;
}
if (arg_type() == YES)
DownScroll();
else {
newline = prev_line(curwind->w_top, max(1, SIZE(curwind) - 1));
SetTop(curwind, curwind->w_line = newline);
if (curwind->w_bufp == curbuf)
SetLine(newline);
}
}
void
UpScroll()
{
SetTop(curwind, next_line(curwind->w_top, arg_value()));
if ((curwind->w_bufp == curbuf) &&
(in_window(curwind, curline) == -1))
SetLine(curwind->w_top);
}
void
DownScroll()
{
SetTop(curwind, prev_line(curwind->w_top, arg_value()));
if ((curwind->w_bufp == curbuf) &&
(in_window(curwind, curline) == -1))
SetLine(curwind->w_top);
}
int VisBell = NO,
RingBell = NO; /* So if we have a lot of errors ...
ring the bell only ONCE */
void
rbell()
{
RingBell = YES;
}
/* Message prints the null terminated string onto the bottom line of the
terminal. */
void
message(str)
char *str;
{
if (InJoverc)
return;
UpdMesg = YES;
errormsg = NO;
if (str != mesgbuf)
null_ncpy(mesgbuf, str, (sizeof mesgbuf) - 1);
}
/* End of Window */
void
Eow()
{
if (Asking)
return;
SetLine(next_line(curwind->w_top, SIZE(curwind) - 1 -
min(SIZE(curwind) - 1, arg_value() - 1)));
if (!is_an_arg())
Eol();
}
/* Beginning of Window */
void
Bow()
{
if (Asking)
return;
SetLine(next_line(curwind->w_top, min(SIZE(curwind) - 1, arg_value() - 1)));
}
private int LineNo,
last_col,
DoAutoNL;
private Window *old_wind; /* save the window we were in BEFORE
before we were called, if UseBuffers
is nonzero */
int UseBuffers = FALSE;
int TOabort = 0;
/* This initializes the typeout. If send-typeout-to-buffers is set
the buffer NAME is created (emptied if it already exists) and output
goes to the buffer. Otherwise output is drawn on the screen and
erased by TOstop() */
void
TOstart(name, auto_newline)
char *name;
{
if (UseBuffers) {
old_wind = curwind;
pop_wind(name, YES, B_SCRATCH);
} else
DisabledRedisplay = YES;
TOabort = LineNo = last_col = 0;
DoAutoNL = auto_newline;
}
/* VARARGS1 */
void
Typeout(fmt, va_alist)
char *fmt;
va_dcl
{
if (TOabort)
return;
if (!UseBuffers && (LineNo == ILI - 1)) {
register int c;
LineNo = 0;
last_col = 0;
f_mess("--more--");
if ((c = getchar()) != ' ') {
TOabort = YES;
if (c != AbortChar && c != RUBOUT)
Ungetc(c);
f_mess(NullStr);
return;
}
f_mess(NullStr);
}
if (fmt) {
extern int i_col;
char string[132];
va_list ap;
va_start(ap);
format(string, sizeof string, fmt, ap);
va_end(ap);
if (UseBuffers)
ins_str(string, NO);
else {
i_set(LineNo, last_col);
(void) swrite(string, NO, YES);
last_col = i_col;
}
}
if (!UseBuffers) {
PhysScreen[LineNo].s_id = -1;
if (fmt == 0 || DoAutoNL == YES) {
cl_eol();
flusho();
LineNo += 1;
last_col = 0;
}
} else if (fmt == 0 || DoAutoNL != 0)
ins_str("\n", NO);
}
void
TOstop()
{
int c;
if (UseBuffers) {
ToFirst();
SetWind(old_wind);
} else {
if (TOabort) {
DisabledRedisplay = NO;
return;
}
if (last_col != 0)
Typeout((char *) 0);
Typeout("----------");
cl_eol();
flusho();
c = getchar();
if (c != ' ')
Ungetc(c);
DisabledRedisplay = NO;
}
}