minix/usr.bin/mdocml/dist/man_term.c

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/* $Vendor-Id: man_term.c,v 1.94 2011/01/04 01:23:18 schwarze Exp $ */
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/*
* Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
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*
* 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 termp *, const char *);
static size_t a2height(const struct termp *, const char *);
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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_alternate(DECL_ARGS);
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static int pre_B(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_RS(DECL_ARGS);
static int pre_SH(DECL_ARGS);
static int pre_SS(DECL_ARGS);
static int pre_TP(DECL_ARGS);
static int pre_ign(DECL_ARGS);
static int pre_in(DECL_ARGS);
static int pre_literal(DECL_ARGS);
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static int pre_sp(DECL_ARGS);
static int pre_ft(DECL_ARGS);
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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_sp, NULL, MAN_NOTEXT }, /* br */
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{ 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_alternate, NULL, 0 }, /* BI */
{ pre_alternate, NULL, 0 }, /* IB */
{ pre_alternate, NULL, 0 }, /* BR */
{ pre_alternate, NULL, 0 }, /* RB */
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{ NULL, NULL, 0 }, /* R */
{ pre_B, NULL, 0 }, /* B */
{ pre_I, NULL, 0 }, /* I */
{ pre_alternate, NULL, 0 }, /* IR */
{ pre_alternate, NULL, 0 }, /* RI */
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{ NULL, NULL, MAN_NOTEXT }, /* na */
{ pre_sp, NULL, MAN_NOTEXT }, /* sp */
{ pre_literal, NULL, 0 }, /* nf */
{ pre_literal, NULL, 0 }, /* fi */
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{ 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_ign, NULL, 0 }, /* AT */
{ pre_in, NULL, MAN_NOTEXT }, /* in */
{ pre_ft, NULL, MAN_NOTEXT }, /* ft */
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};
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 = term_len(p, 5);
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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 = term_len(p, INDENT);
mt.offset = term_len(p, INDENT);
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if (n->child)
print_man_nodelist(p, &mt, n->child, m);
term_end(p);
}
static size_t
a2height(const struct termp *p, const char *cp)
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{
struct roffsu su;
if ( ! a2roffsu(cp, &su, SCALE_VS))
SCALE_VS_INIT(&su, term_strlen(p, cp));
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return(term_vspan(p, &su));
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}
static int
a2width(const struct termp *p, const char *cp)
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{
struct roffsu su;
if ( ! a2roffsu(cp, &su, SCALE_BU))
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return(-1);
return((int)term_hspan(p, &su));
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}
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_literal(DECL_ARGS)
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{
term_newln(p);
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if (MAN_nf == n->tok)
mt->fl |= MANT_LITERAL;
else
mt->fl &= ~MANT_LITERAL;
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return(1);
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}
/* ARGSUSED */
static int
pre_alternate(DECL_ARGS)
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{
enum termfont font[2];
const struct man_node *nn;
int savelit, i;
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switch (n->tok) {
case (MAN_RB):
font[0] = TERMFONT_NONE;
font[1] = TERMFONT_BOLD;
break;
case (MAN_RI):
font[0] = TERMFONT_NONE;
font[1] = TERMFONT_UNDER;
break;
case (MAN_BR):
font[0] = TERMFONT_BOLD;
font[1] = TERMFONT_NONE;
break;
case (MAN_BI):
font[0] = TERMFONT_BOLD;
font[1] = TERMFONT_UNDER;
break;
case (MAN_IR):
font[0] = TERMFONT_UNDER;
font[1] = TERMFONT_NONE;
break;
case (MAN_IB):
font[0] = TERMFONT_UNDER;
font[1] = TERMFONT_BOLD;
break;
default:
abort();
}
savelit = MANT_LITERAL & mt->fl;
mt->fl &= ~MANT_LITERAL;
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for (i = 0, nn = n->child; nn; nn = nn->next, i = 1 - i) {
term_fontrepl(p, font[i]);
if (savelit && NULL == nn->next)
mt->fl |= MANT_LITERAL;
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print_man_node(p, mt, nn, m);
if (nn->next)
p->flags |= TERMP_NOSPACE;
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}
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return(0);
}
/* ARGSUSED */
static int
pre_B(DECL_ARGS)
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{
term_fontrepl(p, TERMFONT_BOLD);
return(1);
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}
/* ARGSUSED */
static int
pre_ft(DECL_ARGS)
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{
const char *cp;
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if (NULL == n->child) {
term_fontlast(p);
return(0);
}
cp = n->child->string;
switch (*cp) {
case ('4'):
/* FALLTHROUGH */
case ('3'):
/* FALLTHROUGH */
case ('B'):
term_fontrepl(p, TERMFONT_BOLD);
break;
case ('2'):
/* FALLTHROUGH */
case ('I'):
term_fontrepl(p, TERMFONT_UNDER);
break;
case ('P'):
term_fontlast(p);
break;
case ('1'):
/* FALLTHROUGH */
case ('C'):
/* FALLTHROUGH */
case ('R'):
term_fontrepl(p, TERMFONT_NONE);
break;
default:
break;
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}
return(0);
}
/* ARGSUSED */
static int
pre_in(DECL_ARGS)
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{
int len, less;
size_t v;
const char *cp;
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term_newln(p);
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if (NULL == n->child) {
p->offset = mt->offset;
return(0);
}
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cp = n->child->string;
less = 0;
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if ('-' == *cp)
less = -1;
else if ('+' == *cp)
less = 1;
else
cp--;
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if ((len = a2width(p, ++cp)) < 0)
return(0);
v = (size_t)len;
if (less < 0)
p->offset -= p->offset > v ? v : p->offset;
else if (less > 0)
p->offset += v;
else
p->offset = v;
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return(0);
}
/* ARGSUSED */
static int
pre_sp(DECL_ARGS)
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{
size_t i, len;
switch (n->tok) {
case (MAN_br):
len = 0;
break;
default:
len = n->child ? a2height(p, n->child->string) : 1;
break;
}
if (0 == len)
term_newln(p);
for (i = 0; i < len; i++)
term_vspace(p);
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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(p, nn->string)) >= 0)
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len = (size_t)ival;
if (0 == len)
len = term_len(p, 1);
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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 = term_len(p, INDENT);
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print_bvspace(p, n);
break;
default:
p->offset = mt->offset;
break;
}
return(MAN_HEAD != n->type);
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}
/* ARGSUSED */
static int
pre_IP(DECL_ARGS)
{
const struct man_node *nn;
size_t len;
int savelit, ival;
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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 the offset from the optional second argument. */
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if (NULL != (nn = n->parent->head->child))
if (NULL != (nn = nn->next))
if ((ival = a2width(p, nn->string)) >= 0)
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len = (size_t)ival;
switch (n->type) {
case (MAN_HEAD):
/* Handle zero-width lengths. */
if (0 == len)
len = term_len(p, 1);
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p->offset = mt->offset;
p->rmargin = mt->offset + len;
if (ival < 0)
break;
/* Set the saved left-margin. */
mt->lmargin = (size_t)ival;
savelit = MANT_LITERAL & mt->fl;
mt->fl &= ~MANT_LITERAL;
if (n->child)
print_man_node(p, mt, n->child, m);
if (savelit)
mt->fl |= MANT_LITERAL;
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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_newln(p);
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p->flags &= ~TERMP_NOLPAD;
break;
default:
break;
}
}
/* ARGSUSED */
static int
pre_TP(DECL_ARGS)
{
const struct man_node *nn;
size_t len;
int savelit, ival;
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switch (n->type) {
case (MAN_HEAD):
p->flags |= TERMP_NOBREAK;
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(p, nn->string)) >= 0)
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len = (size_t)ival;
}
switch (n->type) {
case (MAN_HEAD):
/* Handle zero-length properly. */
if (0 == len)
len = term_len(p, 1);
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p->offset = mt->offset;
p->rmargin = mt->offset + len;
savelit = MANT_LITERAL & mt->fl;
mt->fl &= ~MANT_LITERAL;
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/* Don't print same-line elements. */
for (nn = n->child; nn; nn = nn->next)
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if (nn->line > n->line)
print_man_node(p, mt, nn, m);
if (savelit)
mt->fl |= MANT_LITERAL;
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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_newln(p);
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p->flags &= ~TERMP_NOLPAD;
break;
default:
break;
}
}
/* ARGSUSED */
static int
pre_SS(DECL_ARGS)
{
switch (n->type) {
case (MAN_BLOCK):
mt->lmargin = term_len(p, INDENT);
mt->offset = term_len(p, INDENT);
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/* 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 = term_len(p, HALFINDENT);
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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 = term_len(p, INDENT);
mt->offset = term_len(p, INDENT);
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/* 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 + term_len(p, INDENT);
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p->offset = mt->offset;
return(1);
}
if ((ival = a2width(p, nn->string)) < 0)
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return(1);
mt->offset = term_len(p, INDENT) + (size_t)ival;
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p->offset = mt->offset;
return(1);
}
/* ARGSUSED */
static void
post_RS(DECL_ARGS)
{
switch (n->type) {
case (MAN_BLOCK):
mt->offset = mt->lmargin = term_len(p, INDENT);
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break;
case (MAN_HEAD):
break;
default:
term_newln(p);
p->offset = term_len(p, INDENT);
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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->flags &= ~TERMP_NOLPAD;
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p->rmargin = rm;
p->maxrmargin = rmax;
}
break;
case (MAN_TBL):
if (TBL_SPAN_FIRST & n->span->flags)
term_newln(p);
term_tbl(p, n->span);
break;
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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);
switch (n->type) {
case (MAN_TEXT):
/* FALLTHROUGH */
case (MAN_TBL):
break;
default:
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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);
break;
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}
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 - term_strlen(p, buf);
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p->offset = 0;
/* term_strlen() can return zero. */
if (p->rmargin == p->maxrmargin)
p->rmargin--;
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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 = term_strlen(p, buf);
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snprintf(title, BUFSIZ, "%s(%s)", m->title, m->msec);
titlen = term_strlen(p, title);
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p->offset = 0;
p->rmargin = 2 * (titlen+1) + buflen < p->maxrmargin ?
(p->maxrmargin -
term_strlen(p, buf) + term_len(p, 1)) / 2 :
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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);
}