ref: a70b93a356662355214f5405edda066786f6dd03
dir: /sys/src/cmd/troff/n10.c/
/*
n10.c
Device interfaces
*/
#include "tdef.h"
#include "ext.h"
#include "fns.h"
#include <ctype.h>
Term t; /* terminal characteristics */
int dtab;
int plotmode;
int esct;
enum { Notype = 0, Type = 1 };
static char *parse(char *s, int typeit) /* convert \0, etc to nroff driving table format */
{ /* typeit => add a type id to the front for later use */
static char buf[100], *t, *obuf;
int quote = 0;
wchar_t wc;
obuf = typeit == Type ? buf : buf+1;
#ifdef UNICODE
if (mbtowc(&wc, s, strlen(s)) > 1) { /* it's multibyte, */
buf[0] = MBchar;
strcpy(buf+1, s);
return obuf;
} /* so just hand it back */
#endif /*UNICODE*/
buf[0] = Troffchar;
t = buf + 1;
if (*s == '"') {
s++;
quote = 1;
}
for (;;) {
if (quote && *s == '"') {
s++;
break;
}
if (!quote && (*s == ' ' || *s == '\t' || *s == '\n' || *s == '\0'))
break;
if (*s != '\\')
*t++ = *s++;
else {
s++; /* skip \\ */
if (isdigit(s[0]) && isdigit(s[1]) && isdigit(s[2])) {
*t++ = (s[0]-'0')<<6 | (s[1]-'0')<<3 | s[2]-'0';
s += 2;
} else if (isdigit(s[0])) {
*t++ = *s - '0';
} else if (*s == 'b') {
*t++ = '\b';
} else if (*s == 'n') {
*t++ = '\n';
} else if (*s == 'r') {
*t++ = '\r';
} else if (*s == 't') {
*t++ = '\t';
} else {
*t++ = *s;
}
s++;
}
}
*t = '\0';
return obuf;
}
static int getnrfont(FILE *fp) /* read the nroff description file */
{
FILE *fin;
Chwid chtemp[NCHARS];
static Chwid chinit;
int i, nw, n, wid, code, type;
char buf[100], ch[100], s1[100], s2[100], cmd[300];
wchar_t wc;
chinit.wid = 1;
chinit.str = "";
for (i = 0; i < ALPHABET; i++) {
chtemp[i] = chinit; /* zero out to begin with */
chtemp[i].num = chtemp[i].code = i; /* every alphabetic character is itself */
chtemp[i].wid = 1; /* default ascii widths */
}
skipline(fp);
nw = ALPHABET;
while (fgets(buf, sizeof buf, fp) != NULL) {
sscanf(buf, "%s %s %[^\n]", ch, s1, s2);
if (!eq(s1, "\"")) { /* genuine new character */
sscanf(s1, "%d", &wid);
} /* else it's a synonym for prev character, */
/* so leave previous values intact */
/* decide what kind of alphabet it might come from */
if (strlen(ch) == 1) { /* it's ascii */
n = ch[0]; /* origin includes non-graphics */
chtemp[n].num = ch[0];
} else if (ch[0] == '\\' && ch[1] == '0') {
n = strtol(ch+1, 0, 0); /* \0octal or \0xhex */
chtemp[n].num = n;
#ifdef UNICODE
} else if (mbtowc(&wc, ch, strlen(ch)) > 1) {
chtemp[nw].num = chadd(ch, MBchar, Install);
n = nw;
nw++;
#endif /*UNICODE*/
} else {
if (strcmp(ch, "---") == 0) { /* no name */
sprintf(ch, "%d", code);
type = Number;
} else
type = Troffchar;
/* BUG in here somewhere when same character occurs twice in table */
chtemp[nw].num = chadd(ch, type, Install);
n = nw;
nw++;
}
chtemp[n].wid = wid;
chtemp[n].str = strdupl(parse(s2, Type));
}
t.tfont.nchars = nw;
t.tfont.wp = (Chwid *) malloc(nw * sizeof(Chwid));
if (t.tfont.wp == NULL)
return -1;
for (i = 0; i < nw; i++)
t.tfont.wp[i] = chtemp[i];
return 1;
}
void n_ptinit(void)
{
int i;
char *p, *cp;
char opt[50], cmd[100];
FILE *fp;
hmot = n_hmot;
makem = n_makem;
setabs = n_setabs;
setch = n_setch;
sethl = n_sethl;
setht = n_setht;
setslant = n_setslant;
vmot = n_vmot;
xlss = n_xlss;
findft = n_findft;
width = n_width;
mchbits = n_mchbits;
ptlead = n_ptlead;
ptout = n_ptout;
ptpause = n_ptpause;
setfont = n_setfont;
setps = n_setps;
setwd = n_setwd;
if ((p = getenv("NROFFTERM")) != 0)
strcpy(devname, p);
if (termtab[0] == 0)
strcpy(termtab,DWBntermdir);
if (fontdir[0] == 0)
strcpy(fontdir, "");
if (devname[0] == 0)
strcpy(devname, NDEVNAME);
pl = 11*INCH;
po = PO;
hyf = 0;
ascii = 1;
lg = 0;
fontlab[1] = 'R';
fontlab[2] = 'I';
fontlab[3] = 'B';
fontlab[4] = PAIR('B','I');
fontlab[5] = 'D';
bdtab[3] = 3;
bdtab[4] = 3;
/* hyphalg = 0; /* for testing */
strcat(termtab, devname);
if ((fp = fopen(termtab, "r")) == NULL) {
ERROR "cannot open %s", termtab WARN;
exit(-1);
}
/* this loop isn't robust about input format errors. */
/* it assumes name, name-value pairs..., charset */
/* god help us if we get out of sync. */
fscanf(fp, "%s", cmd); /* should be device name... */
if (!is(devname) && trace)
ERROR "wrong terminal name: saw %s, wanted %s", cmd, devname WARN;
for (;;) {
fscanf(fp, "%s", cmd);
if (is("charset"))
break;
fscanf(fp, " %[^\n]", opt);
if (is("bset")) t.bset = atoi(opt);
else if (is("breset")) t.breset = atoi(opt);
else if (is("Hor")) t.Hor = atoi(opt);
else if (is("Vert")) t.Vert = atoi(opt);
else if (is("Newline")) t.Newline = atoi(opt);
else if (is("Char")) t.Char = atoi(opt);
else if (is("Em")) t.Em = atoi(opt);
else if (is("Halfline")) t.Halfline = atoi(opt);
else if (is("Adj")) t.Adj = atoi(opt);
else if (is("twinit")) t.twinit = strdupl(parse(opt, Notype));
else if (is("twrest")) t.twrest = strdupl(parse(opt, Notype));
else if (is("twnl")) t.twnl = strdupl(parse(opt, Notype));
else if (is("hlr")) t.hlr = strdupl(parse(opt, Notype));
else if (is("hlf")) t.hlf = strdupl(parse(opt, Notype));
else if (is("flr")) t.flr = strdupl(parse(opt, Notype));
else if (is("bdon")) t.bdon = strdupl(parse(opt, Notype));
else if (is("bdoff")) t.bdoff = strdupl(parse(opt, Notype));
else if (is("iton")) t.iton = strdupl(parse(opt, Notype));
else if (is("itoff")) t.itoff = strdupl(parse(opt, Notype));
else if (is("ploton")) t.ploton = strdupl(parse(opt, Notype));
else if (is("plotoff")) t.plotoff = strdupl(parse(opt, Notype));
else if (is("up")) t.up = strdupl(parse(opt, Notype));
else if (is("down")) t.down = strdupl(parse(opt, Notype));
else if (is("right")) t.right = strdupl(parse(opt, Notype));
else if (is("left")) t.left = strdupl(parse(opt, Notype));
else
ERROR "bad tab.%s file, %s %s", devname, cmd, opt WARN;
}
getnrfont(fp);
fclose(fp);
sps = EM;
ics = EM * 2;
dtab = 8 * t.Em;
for (i = 0; i < 16; i++)
tabtab[i] = dtab * (i + 1);
pl = 11 * INCH;
po = PO;
spacesz = SS;
lss = lss1 = VS;
ll = ll1 = lt = lt1 = LL;
smnt = nfonts = 5; /* R I B BI S */
n_specnames(); /* install names like "hyphen", etc. */
if (eqflg)
t.Adj = t.Hor;
}
void n_specnames(void)
{
int i;
for (i = 0; spnames[i].n; i++)
*spnames[i].n = chadd(spnames[i].v, Troffchar, Install);
if (c_isalnum == 0)
c_isalnum = NROFFCHARS;
}
void twdone(void)
{
if (!TROFF && t.twrest) {
obufp = obuf;
oputs(t.twrest);
flusho();
if (pipeflg) {
pclose(ptid);
}
restore_tty();
}
}
void n_ptout(Tchar i)
{
*olinep++ = i;
if (olinep >= &oline[LNSIZE])
olinep--;
if (cbits(i) != '\n')
return;
olinep--;
lead += dip->blss + lss - t.Newline;
dip->blss = 0;
esct = esc = 0;
if (olinep > oline) {
move();
ptout1();
oputs(t.twnl);
} else {
lead += t.Newline;
move();
}
lead += dip->alss;
dip->alss = 0;
olinep = oline;
}
void ptout1(void)
{
int k;
char *codep;
int w, j, phyw;
Tchar *q, i;
static int oxfont = FT; /* start off in roman */
for (q = oline; q < olinep; q++) {
i = *q;
if (ismot(i)) {
j = absmot(i);
if (isnmot(i))
j = -j;
if (isvmot(i))
lead += j;
else
esc += j;
continue;
}
if ((k = cbits(i)) <= ' ') {
switch (k) {
case ' ': /*space*/
esc += t.Char;
break;
case '\033':
case '\007':
case '\016':
case '\017':
oput(k);
break;
}
continue;
}
phyw = w = t.Char * t.tfont.wp[k].wid;
if (iszbit(i))
w = 0;
if (esc || lead)
move();
esct += w;
xfont = fbits(i);
if (xfont != oxfont) {
switch (oxfont) {
case ULFONT: oputs(t.itoff); break;
case BDFONT: oputs(t.bdoff); break;
case BIFONT: oputs(t.itoff); oputs(t.bdoff); break;
}
switch (xfont) {
case ULFONT:
if (*t.iton & 0377) oputs(t.iton); break;
case BDFONT:
if (*t.bdon & 0377) oputs(t.bdon); break;
case BIFONT:
if (*t.bdon & 0377) oputs(t.bdon);
if (*t.iton & 0377) oputs(t.iton);
break;
}
oxfont = xfont;
}
if ((xfont == ulfont || xfont == BIFONT) && !(*t.iton & 0377)) {
for (j = w / t.Char; j > 0; j--)
oput('_');
for (j = w / t.Char; j > 0; j--)
oput('\b');
}
if (!(*t.bdon & 0377) && ((j = bdtab[xfont]) || xfont == BDFONT || xfont == BIFONT))
j++;
else
j = 1; /* number of overstrikes for bold */
if (k < ALPHABET) { /* ordinary ascii */
oput(k);
while (--j > 0) {
oput('\b');
oput(k);
}
} else if (k >= t.tfont.nchars) { /* BUG -- not really understood */
/* fprintf(stderr, "big char %d, name %s\n", k, chname(k)); /* */
oputs(chname(k)+1); /* BUG: should separate Troffchar and MBchar... */
} else if (t.tfont.wp[k].str == 0) {
/* fprintf(stderr, "nostr char %d, name %s\n", k, chname(k)); /* */
oputs(chname(k)+1); /* BUG: should separate Troffchar and MBchar... */
} else if (t.tfont.wp[k].str[0] == MBchar) { /* parse() puts this on */
/* fprintf(stderr, "MBstr char %d, name %s\n", k, chname(k)); /* */
oputs(t.tfont.wp[k].str+1);
} else {
int oj = j;
/* fprintf(stderr, "str char %d, name %s\n", k, chname(k)); /* */
codep = t.tfont.wp[k].str+1; /* Troffchar by default */
while (*codep != 0) {
if (*codep & 0200) {
codep = plot(codep);
oput(' ');
} else {
if (*codep == '%') /* escape */
codep++;
oput(*codep);
if (*codep == '\033')
oput(*++codep);
else if (*codep != '\b')
for (j = oj; --j > 0; ) {
oput('\b');
oput(*codep);
}
codep++;
}
}
}
if (!w)
for (j = phyw / t.Char; j > 0; j--)
oput('\b');
}
}
char *plot(char *x)
{
int i;
char *j, *k;
oputs(t.ploton);
k = x;
if ((*k & 0377) == 0200)
k++;
for (; *k; k++) {
if (*k == '%') { /* quote char within plot mode */
oput(*++k);
} else if (*k & 0200) {
if (*k & 0100) {
if (*k & 040)
j = t.up;
else
j = t.down;
} else {
if (*k & 040)
j = t.left;
else
j = t.right;
}
if ((i = *k & 037) == 0) { /* 2nd 0200 turns it off */
++k;
break;
}
while (i--)
oputs(j);
} else
oput(*k);
}
oputs(t.plotoff);
return(k);
}
void move(void)
{
int k;
char *i, *j;
char *p, *q;
int iesct, dt;
iesct = esct;
if (esct += esc)
i = "\0";
else
i = "\n\0";
j = t.hlf;
p = t.right;
q = t.down;
if (lead) {
if (lead < 0) {
lead = -lead;
i = t.flr;
/* if(!esct)i = t.flr; else i = "\0";*/
j = t.hlr;
q = t.up;
}
if (*i & 0377) {
k = lead / t.Newline;
lead = lead % t.Newline;
while (k--)
oputs(i);
}
if (*j & 0377) {
k = lead / t.Halfline;
lead = lead % t.Halfline;
while (k--)
oputs(j);
} else { /* no half-line forward, not at line begining */
k = lead / t.Newline;
lead = lead % t.Newline;
if (k > 0)
esc = esct;
i = "\n";
while (k--)
oputs(i);
}
}
if (esc) {
if (esc < 0) {
esc = -esc;
j = "\b";
p = t.left;
} else {
j = " ";
if (hflg)
while ((dt = dtab - (iesct % dtab)) <= esc) {
if (dt % t.Em)
break;
oput(TAB);
esc -= dt;
iesct += dt;
}
}
k = esc / t.Em;
esc = esc % t.Em;
while (k--)
oputs(j);
}
if ((*t.ploton & 0377) && (esc || lead)) {
oputs(t.ploton);
esc /= t.Hor;
lead /= t.Vert;
while (esc--)
oputs(p);
while (lead--)
oputs(q);
oputs(t.plotoff);
}
esc = lead = 0;
}
void n_ptlead(void)
{
move();
}
void n_ptpause(void )
{
char junk;
flusho();
read(2, &junk, 1);
}