minix/commands/mdocml/man_term.c

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2010-06-26 04:20:06 +02:00
/* $Id: man_term.c,v 1.76 2010/06/19 20:46:28 kristaps Exp $ */
/*
* Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mandoc.h"
#include "out.h"
#include "man.h"
#include "term.h"
#include "chars.h"
#include "main.h"
#define INDENT 7
#define HALFINDENT 3
/* FIXME: have PD set the default vspace width. */
struct mtermp {
int fl;
#define MANT_LITERAL (1 << 0)
/*
* Default amount to indent the left margin after leading text
* has been printed (e.g., `HP' left-indent, `TP' and `IP' body
* indent). This needs to be saved because `HP' and so on, if
* not having a specified value, must default.
*
* Note that this is the indentation AFTER the left offset, so
* the total offset is usually offset + lmargin.
*/
size_t lmargin;
/*
* The default offset, i.e., the amount between any text and the
* page boundary.
*/
size_t offset;
};
#define DECL_ARGS struct termp *p, \
struct mtermp *mt, \
const struct man_node *n, \
const struct man_meta *m
struct termact {
int (*pre)(DECL_ARGS);
void (*post)(DECL_ARGS);
int flags;
#define MAN_NOTEXT (1 << 0) /* Never has text children. */
};
static int a2width(const struct man_node *);
static int a2height(const struct man_node *);
static void print_man_nodelist(DECL_ARGS);
static void print_man_node(DECL_ARGS);
static void print_man_head(struct termp *, const void *);
static void print_man_foot(struct termp *, const void *);
static void print_bvspace(struct termp *,
const struct man_node *);
static int pre_B(DECL_ARGS);
static int pre_BI(DECL_ARGS);
static int pre_HP(DECL_ARGS);
static int pre_I(DECL_ARGS);
static int pre_IP(DECL_ARGS);
static int pre_PP(DECL_ARGS);
static int pre_RB(DECL_ARGS);
static int pre_RI(DECL_ARGS);
static int pre_RS(DECL_ARGS);
static int pre_SH(DECL_ARGS);
static int pre_SS(DECL_ARGS);
static int pre_TP(DECL_ARGS);
static int pre_br(DECL_ARGS);
static int pre_fi(DECL_ARGS);
static int pre_ign(DECL_ARGS);
static int pre_nf(DECL_ARGS);
static int pre_sp(DECL_ARGS);
static void post_IP(DECL_ARGS);
static void post_HP(DECL_ARGS);
static void post_RS(DECL_ARGS);
static void post_SH(DECL_ARGS);
static void post_SS(DECL_ARGS);
static void post_TP(DECL_ARGS);
static const struct termact termacts[MAN_MAX] = {
{ pre_br, NULL, MAN_NOTEXT }, /* br */
{ NULL, NULL, 0 }, /* TH */
{ pre_SH, post_SH, 0 }, /* SH */
{ pre_SS, post_SS, 0 }, /* SS */
{ pre_TP, post_TP, 0 }, /* TP */
{ pre_PP, NULL, 0 }, /* LP */
{ pre_PP, NULL, 0 }, /* PP */
{ pre_PP, NULL, 0 }, /* P */
{ pre_IP, post_IP, 0 }, /* IP */
{ pre_HP, post_HP, 0 }, /* HP */
{ NULL, NULL, 0 }, /* SM */
{ pre_B, NULL, 0 }, /* SB */
{ pre_BI, NULL, 0 }, /* BI */
{ pre_BI, NULL, 0 }, /* IB */
{ pre_RB, NULL, 0 }, /* BR */
{ pre_RB, NULL, 0 }, /* RB */
{ NULL, NULL, 0 }, /* R */
{ pre_B, NULL, 0 }, /* B */
{ pre_I, NULL, 0 }, /* I */
{ pre_RI, NULL, 0 }, /* IR */
{ pre_RI, NULL, 0 }, /* RI */
{ NULL, NULL, MAN_NOTEXT }, /* na */
{ pre_I, NULL, 0 }, /* i */
{ pre_sp, NULL, MAN_NOTEXT }, /* sp */
{ pre_nf, NULL, 0 }, /* nf */
{ pre_fi, NULL, 0 }, /* fi */
{ NULL, NULL, 0 }, /* r */
{ NULL, NULL, 0 }, /* RE */
{ pre_RS, post_RS, 0 }, /* RS */
{ pre_ign, NULL, 0 }, /* DT */
{ pre_ign, NULL, 0 }, /* UC */
{ pre_ign, NULL, 0 }, /* PD */
{ pre_sp, NULL, MAN_NOTEXT }, /* Sp */
{ pre_nf, NULL, 0 }, /* Vb */
{ pre_fi, NULL, 0 }, /* Ve */
{ pre_ign, NULL, 0 }, /* AT */
};
void
terminal_man(void *arg, const struct man *man)
{
struct termp *p;
const struct man_node *n;
const struct man_meta *m;
struct mtermp mt;
p = (struct termp *)arg;
p->overstep = 0;
p->maxrmargin = p->defrmargin;
p->tabwidth = 5;
if (NULL == p->symtab)
switch (p->enc) {
case (TERMENC_ASCII):
p->symtab = chars_init(CHARS_ASCII);
break;
default:
abort();
/* NOTREACHED */
}
n = man_node(man);
m = man_meta(man);
term_begin(p, print_man_head, print_man_foot, m);
p->flags |= TERMP_NOSPACE;
mt.fl = 0;
mt.lmargin = INDENT;
mt.offset = INDENT;
if (n->child)
print_man_nodelist(p, &mt, n->child, m);
term_end(p);
}
static int
a2height(const struct man_node *n)
{
struct roffsu su;
assert(MAN_TEXT == n->type);
assert(n->string);
if ( ! a2roffsu(n->string, &su, SCALE_VS))
SCALE_VS_INIT(&su, strlen(n->string));
return((int)term_vspan(&su));
}
static int
a2width(const struct man_node *n)
{
struct roffsu su;
assert(MAN_TEXT == n->type);
assert(n->string);
if ( ! a2roffsu(n->string, &su, SCALE_BU))
return(-1);
return((int)term_hspan(&su));
}
static void
print_bvspace(struct termp *p, const struct man_node *n)
{
term_newln(p);
if (NULL == n->prev)
return;
if (MAN_SS == n->prev->tok)
return;
if (MAN_SH == n->prev->tok)
return;
term_vspace(p);
}
/* ARGSUSED */
static int
pre_ign(DECL_ARGS)
{
return(0);
}
/* ARGSUSED */
static int
pre_I(DECL_ARGS)
{
term_fontrepl(p, TERMFONT_UNDER);
return(1);
}
/* ARGSUSED */
static int
pre_fi(DECL_ARGS)
{
mt->fl &= ~MANT_LITERAL;
return(1);
}
/* ARGSUSED */
static int
pre_nf(DECL_ARGS)
{
mt->fl |= MANT_LITERAL;
return(MAN_Vb != n->tok);
}
/* ARGSUSED */
static int
pre_RB(DECL_ARGS)
{
const struct man_node *nn;
int i;
for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
if (i % 2 && MAN_RB == n->tok)
term_fontrepl(p, TERMFONT_BOLD);
else if ( ! (i % 2) && MAN_RB != n->tok)
term_fontrepl(p, TERMFONT_BOLD);
else
term_fontrepl(p, TERMFONT_NONE);
if (i > 0)
p->flags |= TERMP_NOSPACE;
print_man_node(p, mt, nn, m);
}
return(0);
}
/* ARGSUSED */
static int
pre_RI(DECL_ARGS)
{
const struct man_node *nn;
int i;
for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
if (i % 2 && MAN_RI == n->tok)
term_fontrepl(p, TERMFONT_UNDER);
else if ( ! (i % 2) && MAN_RI != n->tok)
term_fontrepl(p, TERMFONT_UNDER);
else
term_fontrepl(p, TERMFONT_NONE);
if (i > 0)
p->flags |= TERMP_NOSPACE;
print_man_node(p, mt, nn, m);
}
return(0);
}
/* ARGSUSED */
static int
pre_BI(DECL_ARGS)
{
const struct man_node *nn;
int i;
for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
if (i % 2 && MAN_BI == n->tok)
term_fontrepl(p, TERMFONT_UNDER);
else if (i % 2)
term_fontrepl(p, TERMFONT_BOLD);
else if (MAN_BI == n->tok)
term_fontrepl(p, TERMFONT_BOLD);
else
term_fontrepl(p, TERMFONT_UNDER);
if (i)
p->flags |= TERMP_NOSPACE;
print_man_node(p, mt, nn, m);
}
return(0);
}
/* ARGSUSED */
static int
pre_B(DECL_ARGS)
{
term_fontrepl(p, TERMFONT_BOLD);
return(1);
}
/* ARGSUSED */
static int
pre_sp(DECL_ARGS)
{
int i, len;
len = n->child ? a2height(n->child) : 1;
if (0 == len)
term_newln(p);
for (i = 0; i <= len; i++)
term_vspace(p);
return(0);
}
/* ARGSUSED */
static int
pre_br(DECL_ARGS)
{
term_newln(p);
return(0);
}
/* ARGSUSED */
static int
pre_HP(DECL_ARGS)
{
size_t len;
int ival;
const struct man_node *nn;
switch (n->type) {
case (MAN_BLOCK):
print_bvspace(p, n);
return(1);
case (MAN_BODY):
p->flags |= TERMP_NOBREAK;
p->flags |= TERMP_TWOSPACE;
break;
default:
return(0);
}
len = mt->lmargin;
ival = -1;
/* Calculate offset. */
if (NULL != (nn = n->parent->head->child))
if ((ival = a2width(nn)) >= 0)
len = (size_t)ival;
if (0 == len)
len = 1;
p->offset = mt->offset;
p->rmargin = mt->offset + len;
if (ival >= 0)
mt->lmargin = (size_t)ival;
return(1);
}
/* ARGSUSED */
static void
post_HP(DECL_ARGS)
{
switch (n->type) {
case (MAN_BLOCK):
term_flushln(p);
break;
case (MAN_BODY):
term_flushln(p);
p->flags &= ~TERMP_NOBREAK;
p->flags &= ~TERMP_TWOSPACE;
p->offset = mt->offset;
p->rmargin = p->maxrmargin;
break;
default:
break;
}
}
/* ARGSUSED */
static int
pre_PP(DECL_ARGS)
{
switch (n->type) {
case (MAN_BLOCK):
mt->lmargin = INDENT;
print_bvspace(p, n);
break;
default:
p->offset = mt->offset;
break;
}
return(1);
}
/* ARGSUSED */
static int
pre_IP(DECL_ARGS)
{
const struct man_node *nn;
size_t len;
int ival;
switch (n->type) {
case (MAN_BODY):
p->flags |= TERMP_NOLPAD;
p->flags |= TERMP_NOSPACE;
break;
case (MAN_HEAD):
p->flags |= TERMP_NOBREAK;
break;
case (MAN_BLOCK):
print_bvspace(p, n);
/* FALLTHROUGH */
default:
return(1);
}
len = mt->lmargin;
ival = -1;
/* Calculate offset. */
if (NULL != (nn = n->parent->head->child))
if (NULL != (nn = nn->next)) {
for ( ; nn->next; nn = nn->next)
/* Do nothing. */ ;
if ((ival = a2width(nn)) >= 0)
len = (size_t)ival;
}
switch (n->type) {
case (MAN_HEAD):
/* Handle zero-width lengths. */
if (0 == len)
len = 1;
p->offset = mt->offset;
p->rmargin = mt->offset + len;
if (ival < 0)
break;
/* Set the saved left-margin. */
mt->lmargin = (size_t)ival;
/* Don't print the length value. */
for (nn = n->child; nn->next; nn = nn->next)
print_man_node(p, mt, nn, m);
return(0);
case (MAN_BODY):
p->offset = mt->offset + len;
p->rmargin = p->maxrmargin;
break;
default:
break;
}
return(1);
}
/* ARGSUSED */
static void
post_IP(DECL_ARGS)
{
switch (n->type) {
case (MAN_HEAD):
term_flushln(p);
p->flags &= ~TERMP_NOBREAK;
p->rmargin = p->maxrmargin;
break;
case (MAN_BODY):
term_flushln(p);
p->flags &= ~TERMP_NOLPAD;
break;
default:
break;
}
}
/* ARGSUSED */
static int
pre_TP(DECL_ARGS)
{
const struct man_node *nn;
size_t len;
int ival;
switch (n->type) {
case (MAN_HEAD):
p->flags |= TERMP_NOBREAK;
p->flags |= TERMP_TWOSPACE;
break;
case (MAN_BODY):
p->flags |= TERMP_NOLPAD;
p->flags |= TERMP_NOSPACE;
break;
case (MAN_BLOCK):
print_bvspace(p, n);
/* FALLTHROUGH */
default:
return(1);
}
len = (size_t)mt->lmargin;
ival = -1;
/* Calculate offset. */
if (NULL != (nn = n->parent->head->child)) {
while (nn && MAN_TEXT != nn->type)
nn = nn->next;
if (nn && nn->next)
if ((ival = a2width(nn)) >= 0)
len = (size_t)ival;
}
switch (n->type) {
case (MAN_HEAD):
/* Handle zero-length properly. */
if (0 == len)
len = 1;
p->offset = mt->offset;
p->rmargin = mt->offset + len;
/* Don't print same-line elements. */
for (nn = n->child; nn; nn = nn->next)
if (nn->line > n->line)
print_man_node(p, mt, nn, m);
if (ival >= 0)
mt->lmargin = (size_t)ival;
return(0);
case (MAN_BODY):
p->offset = mt->offset + len;
p->rmargin = p->maxrmargin;
break;
default:
break;
}
return(1);
}
/* ARGSUSED */
static void
post_TP(DECL_ARGS)
{
switch (n->type) {
case (MAN_HEAD):
term_flushln(p);
p->flags &= ~TERMP_NOBREAK;
p->flags &= ~TERMP_TWOSPACE;
p->rmargin = p->maxrmargin;
break;
case (MAN_BODY):
term_flushln(p);
p->flags &= ~TERMP_NOLPAD;
break;
default:
break;
}
}
/* ARGSUSED */
static int
pre_SS(DECL_ARGS)
{
switch (n->type) {
case (MAN_BLOCK):
mt->lmargin = INDENT;
mt->offset = INDENT;
/* If following a prior empty `SS', no vspace. */
if (n->prev && MAN_SS == n->prev->tok)
if (NULL == n->prev->body->child)
break;
if (NULL == n->prev)
break;
term_vspace(p);
break;
case (MAN_HEAD):
term_fontrepl(p, TERMFONT_BOLD);
p->offset = HALFINDENT;
break;
case (MAN_BODY):
p->offset = mt->offset;
break;
default:
break;
}
return(1);
}
/* ARGSUSED */
static void
post_SS(DECL_ARGS)
{
switch (n->type) {
case (MAN_HEAD):
term_newln(p);
break;
case (MAN_BODY):
term_newln(p);
break;
default:
break;
}
}
/* ARGSUSED */
static int
pre_SH(DECL_ARGS)
{
switch (n->type) {
case (MAN_BLOCK):
mt->lmargin = INDENT;
mt->offset = INDENT;
/* If following a prior empty `SH', no vspace. */
if (n->prev && MAN_SH == n->prev->tok)
if (NULL == n->prev->body->child)
break;
/* If the first macro, no vspae. */
if (NULL == n->prev)
break;
term_vspace(p);
break;
case (MAN_HEAD):
term_fontrepl(p, TERMFONT_BOLD);
p->offset = 0;
break;
case (MAN_BODY):
p->offset = mt->offset;
break;
default:
break;
}
return(1);
}
/* ARGSUSED */
static void
post_SH(DECL_ARGS)
{
switch (n->type) {
case (MAN_HEAD):
term_newln(p);
break;
case (MAN_BODY):
term_newln(p);
break;
default:
break;
}
}
/* ARGSUSED */
static int
pre_RS(DECL_ARGS)
{
const struct man_node *nn;
int ival;
switch (n->type) {
case (MAN_BLOCK):
term_newln(p);
return(1);
case (MAN_HEAD):
return(0);
default:
break;
}
if (NULL == (nn = n->parent->head->child)) {
mt->offset = mt->lmargin + INDENT;
p->offset = mt->offset;
return(1);
}
if ((ival = a2width(nn)) < 0)
return(1);
mt->offset = INDENT + (size_t)ival;
p->offset = mt->offset;
return(1);
}
/* ARGSUSED */
static void
post_RS(DECL_ARGS)
{
switch (n->type) {
case (MAN_BLOCK):
mt->offset = mt->lmargin = INDENT;
break;
case (MAN_HEAD):
break;
default:
term_newln(p);
p->offset = INDENT;
break;
}
}
static void
print_man_node(DECL_ARGS)
{
size_t rm, rmax;
int c;
c = 1;
switch (n->type) {
case(MAN_TEXT):
if (0 == *n->string) {
term_vspace(p);
break;
}
term_word(p, n->string);
/* FIXME: this means that macro lines are munged! */
if (MANT_LITERAL & mt->fl) {
rm = p->rmargin;
rmax = p->maxrmargin;
p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
p->flags |= TERMP_NOSPACE;
term_flushln(p);
p->rmargin = rm;
p->maxrmargin = rmax;
}
break;
default:
if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
term_fontrepl(p, TERMFONT_NONE);
if (termacts[n->tok].pre)
c = (*termacts[n->tok].pre)(p, mt, n, m);
break;
}
if (c && n->child)
print_man_nodelist(p, mt, n->child, m);
if (MAN_TEXT != n->type) {
if (termacts[n->tok].post)
(*termacts[n->tok].post)(p, mt, n, m);
if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
term_fontrepl(p, TERMFONT_NONE);
}
if (MAN_EOS & n->flags)
p->flags |= TERMP_SENTENCE;
}
static void
print_man_nodelist(DECL_ARGS)
{
print_man_node(p, mt, n, m);
if ( ! n->next)
return;
print_man_nodelist(p, mt, n->next, m);
}
static void
print_man_foot(struct termp *p, const void *arg)
{
char buf[DATESIZ];
const struct man_meta *meta;
meta = (const struct man_meta *)arg;
term_fontrepl(p, TERMFONT_NONE);
if (meta->rawdate)
strlcpy(buf, meta->rawdate, DATESIZ);
else
time2a(meta->date, buf, DATESIZ);
term_vspace(p);
term_vspace(p);
term_vspace(p);
p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
p->rmargin = p->maxrmargin - strlen(buf);
p->offset = 0;
if (meta->source)
term_word(p, meta->source);
if (meta->source)
term_word(p, "");
term_flushln(p);
p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
p->offset = p->rmargin;
p->rmargin = p->maxrmargin;
p->flags &= ~TERMP_NOBREAK;
term_word(p, buf);
term_flushln(p);
}
static void
print_man_head(struct termp *p, const void *arg)
{
char buf[BUFSIZ], title[BUFSIZ];
size_t buflen, titlen;
const struct man_meta *m;
m = (const struct man_meta *)arg;
/*
* Note that old groff would spit out some spaces before the
* header. We discontinue this strange behaviour, but at one
* point we did so here.
*/
p->rmargin = p->maxrmargin;
p->offset = 0;
buf[0] = title[0] = '\0';
if (m->vol)
strlcpy(buf, m->vol, BUFSIZ);
buflen = strlen(buf);
snprintf(title, BUFSIZ, "%s(%s)", m->title, m->msec);
titlen = strlen(title);
p->offset = 0;
p->rmargin = 2 * (titlen+1) + buflen < p->maxrmargin ?
(p->maxrmargin - strlen(buf) + 1) / 2 :
p->maxrmargin - buflen;
p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
term_word(p, title);
term_flushln(p);
p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
p->offset = p->rmargin;
p->rmargin = p->offset + buflen + titlen < p->maxrmargin ?
p->maxrmargin - titlen : p->maxrmargin;
term_word(p, buf);
term_flushln(p);
p->flags &= ~TERMP_NOBREAK;
if (p->rmargin + titlen <= p->maxrmargin) {
p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
p->offset = p->rmargin;
p->rmargin = p->maxrmargin;
term_word(p, title);
term_flushln(p);
}
p->rmargin = p->maxrmargin;
p->offset = 0;
p->flags &= ~TERMP_NOSPACE;
/*
* Groff likes to have some leading spaces before content. Well
* that's fine by me.
*/
term_vspace(p);
term_vspace(p);
term_vspace(p);
}