Return to man_term.c CVS log

Up to [cvsweb.bsd.lv] / mandoc

For .RS, we need to save the information how much we actually indented
because negative indents can get truncated, in which case we no longer
know how to restore the original indent at the end of the block.
This also solves another case of effectively infinite output found
by jsg@ with afl, triggered by very large negative indents.

/*	$Id: man_term.c,v 1.165 2014/12/24 18:04:10 schwarze Exp $ */
/*
 * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
 *
 * 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.
 */
#include "config.h"

#include <sys/types.h>

#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "mandoc.h"
#include "mandoc_aux.h"
#include "out.h"
#include "man.h"
#include "term.h"
#include "main.h"

#define	MAXMARGINS	  64 /* maximum number of indented scopes */

struct	mtermp {
	int		  fl;
#define	MANT_LITERAL	 (1 << 0)
	int		  lmargin[MAXMARGINS]; /* margins (incl. vis. page) */
	int		  lmargincur; /* index of current margin */
	int		  lmarginsz; /* actual number of nested margins */
	size_t		  offset; /* default offset to visible page */
	int		  pardist; /* vert. space before par., unit: [v] */
};

#define	DECL_ARGS	  struct termp *p, \
			  struct mtermp *mt, \
			  struct man_node *n, \
			  const struct man_meta *meta

struct	termact {
	int		(*pre)(DECL_ARGS);
	void		(*post)(DECL_ARGS);
	int		  flags;
#define	MAN_NOTEXT	 (1 << 0) /* Never has text children. */
};

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 *, int);

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_OP(DECL_ARGS);
static	int		  pre_PD(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_UR(DECL_ARGS);
static	int		  pre_alternate(DECL_ARGS);
static	int		  pre_ft(DECL_ARGS);
static	int		  pre_ign(DECL_ARGS);
static	int		  pre_in(DECL_ARGS);
static	int		  pre_literal(DECL_ARGS);
static	int		  pre_ll(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	void		  post_UR(DECL_ARGS);

static	const struct termact termacts[MAN_MAX] = {
	{ pre_sp, 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_alternate, NULL, 0 }, /* BI */
	{ pre_alternate, NULL, 0 }, /* IB */
	{ pre_alternate, NULL, 0 }, /* BR */
	{ pre_alternate, NULL, 0 }, /* RB */
	{ NULL, NULL, 0 }, /* R */
	{ pre_B, NULL, 0 }, /* B */
	{ pre_I, NULL, 0 }, /* I */
	{ pre_alternate, NULL, 0 }, /* IR */
	{ pre_alternate, NULL, 0 }, /* RI */
	{ pre_ign, NULL, MAN_NOTEXT }, /* na */
	{ pre_sp, NULL, MAN_NOTEXT }, /* sp */
	{ pre_literal, NULL, 0 }, /* nf */
	{ pre_literal, NULL, 0 }, /* fi */
	{ NULL, NULL, 0 }, /* RE */
	{ pre_RS, post_RS, 0 }, /* RS */
	{ pre_ign, NULL, 0 }, /* DT */
	{ pre_ign, NULL, MAN_NOTEXT }, /* UC */
	{ pre_PD, NULL, MAN_NOTEXT }, /* PD */
	{ pre_ign, NULL, 0 }, /* AT */
	{ pre_in, NULL, MAN_NOTEXT }, /* in */
	{ pre_ft, NULL, MAN_NOTEXT }, /* ft */
	{ pre_OP, NULL, 0 }, /* OP */
	{ pre_literal, NULL, 0 }, /* EX */
	{ pre_literal, NULL, 0 }, /* EE */
	{ pre_UR, post_UR, 0 }, /* UR */
	{ NULL, NULL, 0 }, /* UE */
	{ pre_ll, NULL, MAN_NOTEXT }, /* ll */
};


void
terminal_man(void *arg, const struct man *man)
{
	struct termp		*p;
	const struct man_meta	*meta;
	struct man_node		*n;
	struct mtermp		 mt;

	p = (struct termp *)arg;

	p->overstep = 0;
	p->rmargin = p->maxrmargin = p->defrmargin;
	p->tabwidth = term_len(p, 5);

	n = man_node(man)->child;
	meta = man_meta(man);

	memset(&mt, 0, sizeof(struct mtermp));

	mt.lmargin[mt.lmargincur] = term_len(p, p->defindent);
	mt.offset = term_len(p, p->defindent);
	mt.pardist = 1;

	if (p->synopsisonly) {
		while (n != NULL) {
			if (n->tok == MAN_SH &&
			    n->child->child->type == MAN_TEXT &&
			    !strcmp(n->child->child->string, "SYNOPSIS")) {
				if (n->child->next->child != NULL)
					print_man_nodelist(p, &mt,
					    n->child->next->child, meta);
				term_newln(p);
				break;
			}
			n = n->next;
		}
	} else {
		if (p->defindent == 0)
			p->defindent = 7;
		term_begin(p, print_man_head, print_man_foot, meta);
		p->flags |= TERMP_NOSPACE;
		if (n != NULL)
			print_man_nodelist(p, &mt, n, meta);
		term_end(p);
	}
}

/*
 * Printing leading vertical space before a block.
 * This is used for the paragraph macros.
 * The rules are pretty simple, since there's very little nesting going
 * on here.  Basically, if we're the first within another block (SS/SH),
 * then don't emit vertical space.  If we are (RS), then do.  If not the
 * first, print it.
 */
static void
print_bvspace(struct termp *p, const struct man_node *n, int pardist)
{
	int	 i;

	term_newln(p);

	if (n->body && n->body->child)
		if (MAN_TBL == n->body->child->type)
			return;

	if (MAN_ROOT == n->parent->type || MAN_RS != n->parent->tok)
		if (NULL == n->prev)
			return;

	for (i = 0; i < pardist; i++)
		term_vspace(p);
}


static int
pre_ign(DECL_ARGS)
{

	return(0);
}

static int
pre_ll(DECL_ARGS)
{

	term_setwidth(p, n->nchild ? n->child->string : NULL);
	return(0);
}

static int
pre_I(DECL_ARGS)
{

	term_fontrepl(p, TERMFONT_UNDER);
	return(1);
}

static int
pre_literal(DECL_ARGS)
{

	term_newln(p);

	if (MAN_nf == n->tok || MAN_EX == n->tok)
		mt->fl |= MANT_LITERAL;
	else
		mt->fl &= ~MANT_LITERAL;

	/*
	 * Unlike .IP and .TP, .HP does not have a HEAD.
	 * So in case a second call to term_flushln() is needed,
	 * indentation has to be set up explicitly.
	 */
	if (MAN_HP == n->parent->tok && p->rmargin < p->maxrmargin) {
		p->offset = p->rmargin;
		p->rmargin = p->maxrmargin;
		p->trailspace = 0;
		p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
		p->flags |= TERMP_NOSPACE;
	}

	return(0);
}

static int
pre_PD(DECL_ARGS)
{
	struct roffsu	 su;

	n = n->child;
	if (n == NULL) {
		mt->pardist = 1;
		return(0);
	}
	assert(MAN_TEXT == n->type);
	if (a2roffsu(n->string, &su, SCALE_VS))
		mt->pardist = term_vspan(p, &su);
	return(0);
}

static int
pre_alternate(DECL_ARGS)
{
	enum termfont		 font[2];
	struct man_node		*nn;
	int			 savelit, i;

	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;

	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;
		print_man_node(p, mt, nn, meta);
		if (nn->next)
			p->flags |= TERMP_NOSPACE;
	}

	return(0);
}

static int
pre_B(DECL_ARGS)
{

	term_fontrepl(p, TERMFONT_BOLD);
	return(1);
}

static int
pre_OP(DECL_ARGS)
{

	term_word(p, "[");
	p->flags |= TERMP_NOSPACE;

	if (NULL != (n = n->child)) {
		term_fontrepl(p, TERMFONT_BOLD);
		term_word(p, n->string);
	}
	if (NULL != n && NULL != n->next) {
		term_fontrepl(p, TERMFONT_UNDER);
		term_word(p, n->next->string);
	}

	term_fontrepl(p, TERMFONT_NONE);
	p->flags |= TERMP_NOSPACE;
	term_word(p, "]");
	return(0);
}

static int
pre_ft(DECL_ARGS)
{
	const char	*cp;

	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;
	}
	return(0);
}

static int
pre_in(DECL_ARGS)
{
	struct roffsu	 su;
	const char	*cp;
	size_t		 v;
	int		 less;

	term_newln(p);

	if (NULL == n->child) {
		p->offset = mt->offset;
		return(0);
	}

	cp = n->child->string;
	less = 0;

	if ('-' == *cp)
		less = -1;
	else if ('+' == *cp)
		less = 1;
	else
		cp--;

	if ( ! a2roffsu(++cp, &su, SCALE_EN))
		return(0);

	v = term_hspan(p, &su);

	if (less < 0)
		p->offset -= p->offset > v ? v : p->offset;
	else if (less > 0)
		p->offset += v;
	else
		p->offset = v;
	if (p->offset > SHRT_MAX)
		p->offset = term_len(p, p->defindent);

	return(0);
}

static int
pre_sp(DECL_ARGS)
{
	struct roffsu	 su;
	int		 i, len;

	if ((NULL == n->prev && n->parent)) {
		switch (n->parent->tok) {
		case MAN_SH:
			/* FALLTHROUGH */
		case MAN_SS:
			/* FALLTHROUGH */
		case MAN_PP:
			/* FALLTHROUGH */
		case MAN_LP:
			/* FALLTHROUGH */
		case MAN_P:
			/* FALLTHROUGH */
			return(0);
		default:
			break;
		}
	}

	if (n->tok == MAN_br)
		len = 0;
	else if (n->child == NULL)
		len = 1;
	else {
		if ( ! a2roffsu(n->child->string, &su, SCALE_VS))
			su.scale = 1.0;
		len = term_vspan(p, &su);
	}

	if (len == 0)
		term_newln(p);
	else if (len < 0)
		p->skipvsp -= len;
	else
		for (i = 0; i < len; i++)
			term_vspace(p);

	return(0);
}

static int
pre_HP(DECL_ARGS)
{
	struct roffsu		 su;
	const struct man_node	*nn;
	int			 len;

	switch (n->type) {
	case MAN_BLOCK:
		print_bvspace(p, n, mt->pardist);
		return(1);
	case MAN_BODY:
		break;
	default:
		return(0);
	}

	if ( ! (MANT_LITERAL & mt->fl)) {
		p->flags |= TERMP_NOBREAK | TERMP_BRIND;
		p->trailspace = 2;
	}

	/* Calculate offset. */

	if ((nn = n->parent->head->child) != NULL &&
	    a2roffsu(nn->string, &su, SCALE_EN)) {
		len = term_hspan(p, &su);
		if (len < 0 && (size_t)(-len) > mt->offset)
			len = -mt->offset;
		else if (len > SHRT_MAX)
			len = term_len(p, p->defindent);
		mt->lmargin[mt->lmargincur] = len;
	} else
		len = mt->lmargin[mt->lmargincur];

	p->offset = mt->offset;
	p->rmargin = mt->offset + len;
	return(1);
}

static void
post_HP(DECL_ARGS)
{

	switch (n->type) {
	case MAN_BODY:
		term_newln(p);
		p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
		p->trailspace = 0;
		p->offset = mt->offset;
		p->rmargin = p->maxrmargin;
		break;
	default:
		break;
	}
}

static int
pre_PP(DECL_ARGS)
{

	switch (n->type) {
	case MAN_BLOCK:
		mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
		print_bvspace(p, n, mt->pardist);
		break;
	default:
		p->offset = mt->offset;
		break;
	}

	return(MAN_HEAD != n->type);
}

static int
pre_IP(DECL_ARGS)
{
	struct roffsu		 su;
	const struct man_node	*nn;
	int			 len, savelit;

	switch (n->type) {
	case MAN_BODY:
		p->flags |= TERMP_NOSPACE;
		break;
	case MAN_HEAD:
		p->flags |= TERMP_NOBREAK;
		p->trailspace = 1;
		break;
	case MAN_BLOCK:
		print_bvspace(p, n, mt->pardist);
		/* FALLTHROUGH */
	default:
		return(1);
	}

	/* Calculate the offset from the optional second argument. */
	if ((nn = n->parent->head->child) != NULL &&
	    (nn = nn->next) != NULL &&
	    a2roffsu(nn->string, &su, SCALE_EN)) {
		len = term_hspan(p, &su);
		if (len < 0 && (size_t)(-len) > mt->offset)
			len = -mt->offset;
		else if (len > SHRT_MAX)
			len = term_len(p, p->defindent);
		mt->lmargin[mt->lmargincur] = len;
	} else
		len = mt->lmargin[mt->lmargincur];

	switch (n->type) {
	case MAN_HEAD:
		p->offset = mt->offset;
		p->rmargin = mt->offset + len;

		savelit = MANT_LITERAL & mt->fl;
		mt->fl &= ~MANT_LITERAL;

		if (n->child)
			print_man_node(p, mt, n->child, meta);

		if (savelit)
			mt->fl |= MANT_LITERAL;

		return(0);
	case MAN_BODY:
		p->offset = mt->offset + len;
		p->rmargin = p->maxrmargin;
		break;
	default:
		break;
	}

	return(1);
}

static void
post_IP(DECL_ARGS)
{

	switch (n->type) {
	case MAN_HEAD:
		term_flushln(p);
		p->flags &= ~TERMP_NOBREAK;
		p->trailspace = 0;
		p->rmargin = p->maxrmargin;
		break;
	case MAN_BODY:
		term_newln(p);
		p->offset = mt->offset;
		break;
	default:
		break;
	}
}

static int
pre_TP(DECL_ARGS)
{
	struct roffsu		 su;
	struct man_node		*nn;
	int			 len, savelit;

	switch (n->type) {
	case MAN_HEAD:
		p->flags |= TERMP_NOBREAK;
		p->trailspace = 1;
		break;
	case MAN_BODY:
		p->flags |= TERMP_NOSPACE;
		break;
	case MAN_BLOCK:
		print_bvspace(p, n, mt->pardist);
		/* FALLTHROUGH */
	default:
		return(1);
	}

	/* Calculate offset. */

	if ((nn = n->parent->head->child) != NULL &&
	    nn->string != NULL && ! (MAN_LINE & nn->flags) &&
	    a2roffsu(nn->string, &su, SCALE_EN)) {
		len = term_hspan(p, &su);
		if (len < 0 && (size_t)(-len) > mt->offset)
			len = -mt->offset;
		else if (len > SHRT_MAX)
			len = term_len(p, p->defindent);
		mt->lmargin[mt->lmargincur] = len;
	} else
		len = mt->lmargin[mt->lmargincur];

	switch (n->type) {
	case MAN_HEAD:
		p->offset = mt->offset;
		p->rmargin = mt->offset + len;

		savelit = MANT_LITERAL & mt->fl;
		mt->fl &= ~MANT_LITERAL;

		/* Don't print same-line elements. */
		nn = n->child;
		while (NULL != nn && 0 == (MAN_LINE & nn->flags))
			nn = nn->next;

		while (NULL != nn) {
			print_man_node(p, mt, nn, meta);
			nn = nn->next;
		}

		if (savelit)
			mt->fl |= MANT_LITERAL;
		return(0);
	case MAN_BODY:
		p->offset = mt->offset + len;
		p->rmargin = p->maxrmargin;
		p->trailspace = 0;
		p->flags &= ~TERMP_NOBREAK;
		break;
	default:
		break;
	}

	return(1);
}

static void
post_TP(DECL_ARGS)
{

	switch (n->type) {
	case MAN_HEAD:
		term_flushln(p);
		break;
	case MAN_BODY:
		term_newln(p);
		p->offset = mt->offset;
		break;
	default:
		break;
	}
}

static int
pre_SS(DECL_ARGS)
{
	int	 i;

	switch (n->type) {
	case MAN_BLOCK:
		mt->fl &= ~MANT_LITERAL;
		mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
		mt->offset = term_len(p, p->defindent);

		/*
		 * No vertical space before the first subsection
		 * and after an empty subsection.
		 */

		do {
			n = n->prev;
		} while (n != NULL && termacts[n->tok].flags & MAN_NOTEXT);
		if (n == NULL || (n->tok == MAN_SS && n->body->child == NULL))
			break;

		for (i = 0; i < mt->pardist; i++)
			term_vspace(p);
		break;
	case MAN_HEAD:
		term_fontrepl(p, TERMFONT_BOLD);
		p->offset = term_len(p, 3);
		break;
	case MAN_BODY:
		p->offset = mt->offset;
		break;
	default:
		break;
	}

	return(1);
}

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;
	}
}

static int
pre_SH(DECL_ARGS)
{
	int	 i;

	switch (n->type) {
	case MAN_BLOCK:
		mt->fl &= ~MANT_LITERAL;
		mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
		mt->offset = term_len(p, p->defindent);

		/*
		 * No vertical space before the first section
		 * and after an empty section.
		 */

		do {
			n = n->prev;
		} while (n != NULL && termacts[n->tok].flags & MAN_NOTEXT);
		if (n == NULL || (n->tok == MAN_SH && n->body->child == NULL))
			break;

		for (i = 0; i < mt->pardist; i++)
			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);
}

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;
	}
}

static int
pre_RS(DECL_ARGS)
{
	struct roffsu	 su;

	switch (n->type) {
	case MAN_BLOCK:
		term_newln(p);
		return(1);
	case MAN_HEAD:
		return(0);
	default:
		break;
	}

	n = n->parent->head;
	n->aux = SHRT_MAX + 1;
	if (n->child != NULL && a2roffsu(n->child->string, &su, SCALE_EN))
		n->aux = term_hspan(p, &su);
	if (n->aux < 0 && (size_t)(-n->aux) > mt->offset)
		n->aux = -mt->offset;
	else if (n->aux > SHRT_MAX)
		n->aux = term_len(p, p->defindent);

	mt->offset += n->aux;
	p->offset = mt->offset;
	p->rmargin = p->maxrmargin;

	if (++mt->lmarginsz < MAXMARGINS)
		mt->lmargincur = mt->lmarginsz;

	mt->lmargin[mt->lmargincur] = mt->lmargin[mt->lmargincur - 1];
	return(1);
}

static void
post_RS(DECL_ARGS)
{

	switch (n->type) {
	case MAN_BLOCK:
		return;
	case MAN_HEAD:
		return;
	default:
		term_newln(p);
		break;
	}

	mt->offset -= n->parent->head->aux;
	p->offset = mt->offset;

	if (--mt->lmarginsz < MAXMARGINS)
		mt->lmargincur = mt->lmarginsz;
}

static int
pre_UR(DECL_ARGS)
{

	return (MAN_HEAD != n->type);
}

static void
post_UR(DECL_ARGS)
{

	if (MAN_BLOCK != n->type)
		return;

	term_word(p, "<");
	p->flags |= TERMP_NOSPACE;

	if (NULL != n->child->child)
		print_man_node(p, mt, n->child->child, meta);

	p->flags |= TERMP_NOSPACE;
	term_word(p, ">");
}

static void
print_man_node(DECL_ARGS)
{
	size_t		 rm, rmax;
	int		 c;

	switch (n->type) {
	case MAN_TEXT:
		/*
		 * If we have a blank line, output a vertical space.
		 * If we have a space as the first character, break
		 * before printing the line's data.
		 */
		if ('\0' == *n->string) {
			term_vspace(p);
			return;
		} else if (' ' == *n->string && MAN_LINE & n->flags)
			term_newln(p);

		term_word(p, n->string);
		goto out;

	case MAN_EQN:
		if ( ! (n->flags & MAN_LINE))
			p->flags |= TERMP_NOSPACE;
		term_eqn(p, n->eqn);
		if (n->next != NULL && ! (n->next->flags & MAN_LINE))
			p->flags |= TERMP_NOSPACE;
		return;
	case MAN_TBL:
		/*
		 * Tables are preceded by a newline.  Then process a
		 * table line, which will cause line termination,
		 */
		if (TBL_SPAN_FIRST & n->span->flags)
			term_newln(p);
		term_tbl(p, n->span);
		return;
	default:
		break;
	}

	if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
		term_fontrepl(p, TERMFONT_NONE);

	c = 1;
	if (termacts[n->tok].pre)
		c = (*termacts[n->tok].pre)(p, mt, n, meta);

	if (c && n->child)
		print_man_nodelist(p, mt, n->child, meta);

	if (termacts[n->tok].post)
		(*termacts[n->tok].post)(p, mt, n, meta);
	if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
		term_fontrepl(p, TERMFONT_NONE);

out:
	/*
	 * If we're in a literal context, make sure that words
	 * together on the same line stay together.  This is a
	 * POST-printing call, so we check the NEXT word.  Since
	 * -man doesn't have nested macros, we don't need to be
	 * more specific than this.
	 */
	if (mt->fl & MANT_LITERAL &&
	    ! (p->flags & (TERMP_NOBREAK | TERMP_NONEWLINE)) &&
	    (n->next == NULL || n->next->flags & MAN_LINE)) {
		rm = p->rmargin;
		rmax = p->maxrmargin;
		p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
		p->flags |= TERMP_NOSPACE;
		if (n->string != NULL && *n->string != '\0')
			term_flushln(p);
		else
			term_newln(p);
		if (rm < rmax && n->parent->tok == MAN_HP) {
			p->offset = rm;
			p->rmargin = rmax;
		} else
			p->rmargin = rm;
		p->maxrmargin = rmax;
	}
	if (MAN_EOS & n->flags)
		p->flags |= TERMP_SENTENCE;
}


static void
print_man_nodelist(DECL_ARGS)
{

	print_man_node(p, mt, n, meta);
	if ( ! n->next)
		return;
	print_man_nodelist(p, mt, n->next, meta);
}

static void
print_man_foot(struct termp *p, const void *arg)
{
	const struct man_meta	*meta;
	char			*title;
	size_t			 datelen, titlen;

	meta = (const struct man_meta *)arg;
	assert(meta->title);
	assert(meta->msec);
	assert(meta->date);

	term_fontrepl(p, TERMFONT_NONE);

	if (meta->hasbody)
		term_vspace(p);

	/*
	 * Temporary, undocumented option to imitate mdoc(7) output.
	 * In the bottom right corner, use the source instead of
	 * the title.
	 */

	if ( ! p->mdocstyle) {
		if (meta->hasbody) {
			term_vspace(p);
			term_vspace(p);
		}
		mandoc_asprintf(&title, "%s(%s)",
		    meta->title, meta->msec);
	} else if (meta->source) {
		title = mandoc_strdup(meta->source);
	} else {
		title = mandoc_strdup("");
	}
	datelen = term_strlen(p, meta->date);

	/* Bottom left corner: manual source. */

	p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
	p->trailspace = 1;
	p->offset = 0;
	p->rmargin = p->maxrmargin > datelen ?
	    (p->maxrmargin + term_len(p, 1) - datelen) / 2 : 0;

	if (meta->source)
		term_word(p, meta->source);
	term_flushln(p);

	/* At the bottom in the middle: manual date. */

	p->offset = p->rmargin;
	titlen = term_strlen(p, title);
	p->rmargin = p->maxrmargin > titlen ? p->maxrmargin - titlen : 0;
	p->flags |= TERMP_NOSPACE;

	term_word(p, meta->date);
	term_flushln(p);

	/* Bottom right corner: manual title and section. */

	p->flags &= ~TERMP_NOBREAK;
	p->flags |= TERMP_NOSPACE;
	p->trailspace = 0;
	p->offset = p->rmargin;
	p->rmargin = p->maxrmargin;

	term_word(p, title);
	term_flushln(p);
	free(title);
}

static void
print_man_head(struct termp *p, const void *arg)
{
	const struct man_meta	*meta;
	const char		*volume;
	char			*title;
	size_t			 vollen, titlen;

	meta = (const struct man_meta *)arg;
	assert(meta->title);
	assert(meta->msec);

	volume = NULL == meta->vol ? "" : meta->vol;
	vollen = term_strlen(p, volume);

	/* Top left corner: manual title and section. */

	mandoc_asprintf(&title, "%s(%s)", meta->title, meta->msec);
	titlen = term_strlen(p, title);

	p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
	p->trailspace = 1;
	p->offset = 0;
	p->rmargin = 2 * (titlen+1) + vollen < p->maxrmargin ?
	    (p->maxrmargin - vollen + term_len(p, 1)) / 2 :
	    vollen < p->maxrmargin ? p->maxrmargin - vollen : 0;

	term_word(p, title);
	term_flushln(p);

	/* At the top in the middle: manual volume. */

	p->flags |= TERMP_NOSPACE;
	p->offset = p->rmargin;
	p->rmargin = p->offset + vollen + titlen < p->maxrmargin ?
	    p->maxrmargin - titlen : p->maxrmargin;

	term_word(p, volume);
	term_flushln(p);

	/* Top right corner: title and section, again. */

	p->flags &= ~TERMP_NOBREAK;
	p->trailspace = 0;
	if (p->rmargin + titlen <= p->maxrmargin) {
		p->flags |= TERMP_NOSPACE;
		p->offset = p->rmargin;
		p->rmargin = p->maxrmargin;
		term_word(p, title);
		term_flushln(p);
	}

	p->flags &= ~TERMP_NOSPACE;
	p->offset = 0;
	p->rmargin = p->maxrmargin;

	/*
	 * Groff prints three blank lines before the content.
	 * Do the same, except in the temporary, undocumented
	 * mode imitating mdoc(7) output.
	 */

	term_vspace(p);
	if ( ! p->mdocstyle) {
		term_vspace(p);
		term_vspace(p);
	}
	free(title);
}