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BSD 4_3 development
[unix-history] / usr / contrib / jove / disp.c
/*************************************************************************
* This program is copyright (C) 1985, 1986 by Jonathan Payne. It is *
* provided to you without charge for use only on a licensed Unix *
* system. You may copy JOVE provided that this notice is included with *
* the copy. You may not sell copies of this program or versions *
* modified for use on microcomputer systems, unless the copies are *
* included with a Unix system distribution and the source is provided. *
*************************************************************************/
#include "jove.h"
#include "ctype.h"
#include "termcap.h"
#include <varargs.h>
#include <signal.h>
#include <sys/stat.h>
/* 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. */
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 |= TOPGONE;
if (lp == w->w_line)
w->w_flags |= CURGONE;
}
w = w->w_next;
} while (w != fwind);
}
extern int RingBell;
redisplay()
{
register Window *w = fwind;
int lineno,
done_ID = 0,
i;
register struct scrimage *des_p,
*phys_p;
curwind->w_line = curwind->w_bufp->b_dot;
curwind->w_char = curwind->w_bufp->b_char;
if (InputPending = charp())
return;
#ifdef JOB_CONTROL
if (UpdFreq)
sighold(SIGALRM);
#endif
if (RingBell) {
dobell(1);
RingBell = 0;
}
if (UpdMesg)
DrawMesg(YES);
for (lineno = 0, w = fwind; lineno < ILI; w = w->w_next) {
UpdWindow(w, lineno);
lineno += w->w_height;
}
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++;
}
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;
}
UpdModLine = 0;
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
}
dobell(n)
{
while (--n >= 0) {
if (VisBell && VB)
putstr(VB);
else
putpad("20\007", 1);
}
flusho();
}
/* find_pos() returns the position on the line, that c_char represents
in line. */
find_pos(line, c_char)
Line *line;
{
return calc_pos(lcontents(line), c_char);
}
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++) & 0177) != 0) {
if (c == '\t')
pos += (tabstop - (pos % tabstop));
else if (isctrl(c))
pos += 2;
else
pos++;
}
return pos;
}
int UpdModLine = 0,
UpdMesg = 0,
CanScroll = 0;
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. */
UpdWindow(w, start)
register Window *w;
{
Line *lp;
int i,
DotIsHere = 0,
upper, /* Top of window */
lower, /* Bottom of window */
ntries = 0; /* # of tries at updating window. */
register struct scrimage *des_p,
*phys_p;
Buffer *bp = w->w_bufp;
retry:
if (w->w_flags & CURGONE) {
w->w_line = bp->b_dot;
w->w_char = bp->b_char;
}
if (w->w_flags & TOPGONE)
CentWind(w); /* Reset topline of screen */
w->w_flags = 0;
for (i = w->w_height, lp = w->w_top; --i > 0 && lp != 0; lp = lp->l_next)
if (lp == w->w_line)
break;
if (i == 0 || lp == 0) { /* Current line not in window */
ntries++;
if (ntries == 1) {
CalcWind(w);
goto retry;
} else if (ntries == 2) {
w->w_top = w->w_line = w->w_bufp->b_first;
f_mess("ERROR in redisplay: I got hopelessly lost!");
goto retry;
} else if (ntries == 3) {
printf("\rOops, still lost, quitting ...\r\n");
finish(1);
}
}
upper = start;
lower = upper + w->w_height - 1; /* Don't include modeline */
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_numlines)
des_p->s_vln = w->w_topnum + (i - upper);
else
des_p->s_vln = 0;
if (lp == w->w_line) {
int diff = w->w_numlines ? 8 : 0,
strt_col = phys_p->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
colums, not actual characters. */
w->w_dotline = i;
w->w_dotcol = find_pos(lp, w->w_char);
/* if the new dotcol is out of range, reselect
a horizontal window */
if (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);
}
w->w_dotcol += diff;
des_p->s_offset = strt_col;
DotIsHere++;
} else
des_p->s_offset = 0;
}
if (!DotIsHere) {
f_mess("DotNotHere is impossible!");
finish(1);
}
/* Is structure assignment faster than copy each field seperately */
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;
}
/* Write whatever is in mesgbuf (maybe we are Asking, or just printed
a message). Turns off the UpdateMesg line flag. */
DrawMesg(abortable)
{
if (charp())
return;
i_set(ILI, 0);
if (swrite(mesgbuf, NIL, 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. */
GotoDot()
{
if (InputPending)
return;
Placur(curwind->w_dotline, curwind->w_dotcol -
PhysScreen[curwind->w_dotline].s_offset);
flusho();
}
private
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++;
phys_p++;
start++;
}
return start;
}
/* Calls the routine to do the physical changes, and changes PhysScreen to
reflect those changes. */
AddLines(at, num)
register int at,
num;
{
register int i;
int bottom = UntilEqual(at + num);
if (num == 0 || num >= ((bottom - 1) - at))
return 0; /* 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 1; /* We did something. */
}
DelLines(at, num)
register int at,
num;
{
register int i;
int bottom = UntilEqual(at + num);
if (num == 0 || num >= ((bottom - 1) - at))
return 0;
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 1;
}
/* 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. */
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_numlines)
#else
if (w->w_numlines)
#endif
(void) swrite(sprint("%6d ", des_p->s_vln), NIL, YES);
#ifdef ID_CHAR
if (UseIC) {
char outbuf[256],
*lptr;
int fromcol = w->w_numlines ? 8 : 0;
if (w->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_visspace);
if (IDchar(outbuf, linenum, 0))
PhysScreen[linenum] = *des_p;
else if (i_set(linenum, 0), swrite(outbuf, NIL, 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);
}
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;
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);
}
INSmode(on)
{
if (on && !IN_INSmode) {
putpad(IM, 1);
IN_INSmode++;
} else if (!on && IN_INSmode) {
putpad(EI, 1);
IN_INSmode = 0;
}
}
private
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;
}
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
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
NumSimilar(s, t, n)
register char *s,
*t;
{
register int num = 0;
while (n--)
if (*s++ == *t++)
num++;
return num;
}
private
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++;
}
return num;
}
private
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
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
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
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
/* chkmail() returns nonzero if there is new mail since the
last time we checked. */
char Mailbox[128]; /* 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
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;
extern time_t time0;
time(&now);
if (!force && (now < last_chk + MailInt))
return value;
if (stat(Mailbox, &stbuf) < 0)
return FALSE;
last_val = value;
value = ((stbuf.st_mtime > time0) &&
(stbuf.st_size > 0) &&
(stbuf.st_size > last_size) &&
(stbuf.st_mtime + 5 > stbuf.st_atime));
last_chk = now;
last_size = stbuf.st_size;
if (value == TRUE && value != last_val)
dobell(3);
return value;
}
/* Print the mode line. */
private char *mode_p,
*mend_p;
int BriteMode = 1; /* modeline should standout */
private
mode_app(str)
register char *str;
{
if (mode_p >= mend_p)
return;
while ((mode_p < mend_p) && (*mode_p++ = *str++))
;
mode_p--; /* back over the null */
}
char ModeFmt[120] = "%3c %[%sJOVE (%M) Buffer: %b \"%f\" %]%s%m %((%t)%s%)%e";
ModeLine(w)
register Window *w;
{
extern int i_line;
int n,
ign_some = 0;
char line[132],
*fmt = ModeFmt,
tmp[16],
fillc,
c;
register Buffer *thisbuf = w->w_bufp;
register Buffer *bp;
mode_p = line;
mend_p = &line[(sizeof line) - 1];
if (BriteMode != 0 && SO == 0)
BriteMode = 0;
fillc = BriteMode ? ' ' : '-';
while (c = *fmt++) {
if (c == '\\')
c = *fmt++;
if (c != '%') {
if (!ign_some)
*mode_p++ = c;
continue;
}
c = *fmt++; /* Character after the percent! */
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++;
break;
case ')':
ign_some = 0;
break;
case 'c':
while (--n >= 0)
*mode_p++ = fillc;
break;
case '[':
case ']':
{
char *strs = (c == '[') ? "[[[[[[[[[[" : "]]]]]]]]]]";
mode_app(strs + 10 - RecDepth);
break;
}
case 's':
if (mode_p[-1] == ' ')
continue;
*mode_p++ = ' ';
break;
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 (KeyMacro.m_flags & DEFINE)
mode_app("Def ");
mode_p--; /* Back over the extra space. */
break;
}
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));
else
mode_app(basename(thisbuf->b_fname));
}
break;
case 'n':
for (bp = world, n = 1; bp != 0; bp = bp->b_next, n++)
if (bp == thisbuf)
break;
sprintf(tmp, "%d", n);
mode_app(tmp);
break;
case 'm':
if (IsModified(w->w_bufp))
*mode_p++ = '*';
else
*mode_p++ = ' ';
break;
case 't':
{
char timestr[12];
mode_app(get_time((time_t *) 0, timestr, 11, 16));
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 'C': /* check mail here */
if (chkmail(NO))
mode_app("[New mail]");
break;
#ifdef CHDIR
case 'd': /* print working directory */
mode_app(pr_name(pwd()));
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! */
}
}
}
outahere:
*mode_p = 0;
/* Highlight mode line. */
if (BriteMode) {
#ifdef ID_CHAR
if (IN_INSmode)
INSmode(0);
#endif
putpad(SO, 1);
}
if (swrite(line, BriteMode, YES))
do_cl_eol(i_line);
if (BriteMode)
putpad(SE, 1);
}
RedrawDisplay()
{
Line *newtop = prev_line((curwind->w_line = curline), exp_p ?
exp : HALF(curwind));
if (newtop == curwind->w_top)
v_clear(FLine(curwind), FLine(curwind) + SIZE(curwind));
else
SetTop(curwind, newtop);
}
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++, des_p++;
}
}
ClAndRedraw()
{
cl_scr(1);
}
NextPage()
{
Line *newline;
if (Asking)
return;
if (exp < 0) {
exp = -exp;
PrevPage();
return;
}
if (exp_p)
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);
}
}
PrevPage()
{
Line *newline;
if (Asking)
return;
if (exp < 0) {
exp = -exp;
NextPage();
return;
}
if (exp_p)
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);
}
}
UpScroll()
{
SetTop(curwind, next_line(curwind->w_top, exp));
if ((curwind->w_bufp == curbuf) &&
(in_window(curwind, curline) == -1))
SetLine(curwind->w_top);
}
DownScroll()
{
SetTop(curwind, prev_line(curwind->w_top, exp));
if ((curwind->w_bufp == curbuf) &&
(in_window(curwind, curline) == -1))
SetLine(curwind->w_top);
}
int VisBell = 0,
RingBell = 0; /* So if we have a lot of errors ...
ring the bell only ONCE */
rbell()
{
RingBell++;
}
/* Message prints the null terminated string onto the bottom line of the
terminal. */
message(str)
char *str;
{
if (InJoverc)
return;
UpdMesg++;
errormsg = 0;
if (str != mesgbuf)
null_ncpy(mesgbuf, str, (sizeof mesgbuf) - 1);
}
/* End of Window */
Eow()
{
if (Asking)
return;
SetLine(next_line(curwind->w_top, SIZE(curwind) - 1 -
min(SIZE(curwind) - 1, exp - 1)));
if (!exp_p)
Eol();
}
/* Beginning of Window */
Bow()
{
if (Asking)
return;
SetLine(next_line(curwind->w_top, min(SIZE(curwind) - 1, exp - 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() */
TOstart(name, auto_newline)
char *name;
{
if (UseBuffers) {
old_wind = curwind;
pop_wind(name, YES, B_SCRATCH);
}
TOabort = LineNo = last_col = 0;
DoAutoNL = auto_newline;
}
/* VARARGS1 */
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++;
if (c != CTL(G) && c != RUBOUT)
Ungetc(c);
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, NIL, YES);
last_col = i_col;
}
}
if (!UseBuffers) {
PhysScreen[LineNo].s_id = -1;
if (fmt == 0 || DoAutoNL != 0) {
cl_eol();
flusho();
LineNo++;
last_col = 0;
}
} else if (fmt == 0 || DoAutoNL != 0)
ins_str("\n", NO);
}
TOstop()
{
int c;
if (UseBuffers) {
ToFirst();
SetWind(old_wind);
} else {
if (TOabort)
return;
if (last_col != 0)
Typeout((char *) 0);
Typeout("----------");
cl_eol();
flusho();
c = getchar();
if (c != ' ')
Ungetc(c);
}
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.