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📄 NEWS(60.04 KB)
📄 TODO(23.98 KB)
📄 apropos.1(10.66 KB)
📄 arch.c(1.94 KB)
📄 att.c(1.62 KB)
📄 catman.8(4.49 KB)
📄 catman.c(5.52 KB)
📄 cgi.c(27.06 KB)
📄 cgi.h.example(220 B)
📄 chars.c(13.24 KB)
📄 compat_err.c(2.68 KB)
📄 compat_fts.c(17.42 KB)
📄 compat_fts.h(4.09 KB)
📄 compat_getline.c(1.59 KB)
📄 compat_getsubopt.c(2.89 KB)
📄 compat_isblank.c(986 B)
📄 compat_mkdtemp.c(1.59 KB)
📄 compat_ohash.c(6.82 KB)
📄 compat_ohash.h(2.63 KB)
📄 compat_progname.c(1.05 KB)
📄 compat_reallocarray.c(1.49 KB)
📄 compat_recallocarray.c(2.88 KB)
📄 compat_strcasestr.c(2.38 KB)
📄 compat_stringlist.c(2.71 KB)
📄 compat_stringlist.h(1.73 KB)
📄 compat_strlcat.c(1.71 KB)
📄 compat_strlcpy.c(1.59 KB)
📄 compat_strndup.c(1.3 KB)
📄 compat_strsep.c(2.55 KB)
📄 compat_strtonum.c(1.88 KB)
📄 compat_vasprintf.c(1.55 KB)
📄 config.h(1.33 KB)
📄 configure(17.5 KB)
📄 configure.local.example(11.37 KB)
📄 dba.c(13.02 KB)
📄 dba.h(1.73 KB)
📄 dba_array.c(4.23 KB)
📄 dba_array.h(2 KB)
📄 dba_read.c(2.33 KB)
📄 dba_write.c(2.42 KB)
📄 dba_write.h(1.23 KB)
📄 dbm.c(9.28 KB)
📄 dbm.h(1.94 KB)
📄 dbm_map.c(4.67 KB)
📄 dbm_map.h(1.2 KB)
📄 demandoc.1(2.64 KB)
📄 demandoc.c(5.21 KB)
📄 eqn.7(12.07 KB)
📄 eqn.c(27.21 KB)
📄 eqn.h(2.19 KB)
📄 eqn_html.c(5.91 KB)
📄 eqn_parse.h(1.96 KB)
📄 eqn_term.c(4.83 KB)
📄 gmdiff(1.74 KB)
📄 html.c(19.34 KB)
📄 html.h(3.86 KB)
📄 lib.c(1.07 KB)
📄 lib.in(8.96 KB)
📄 libman.h(1.66 KB)
📄 libmandoc.h(3.21 KB)
📄 libmdoc.h(2.97 KB)
📄 main.c(28.93 KB)
📄 main.h(2.06 KB)
📄 makewhatis.8(4.78 KB)
📄 man-cgi.css(464 B)
📄 man.1(9.33 KB)
📄 man.7(16.8 KB)
📄 man.c(8.62 KB)
📄 man.cgi.3(7.83 KB)
📄 man.cgi.8(11.02 KB)
📄 man.conf.5(3.92 KB)
📄 man.h(991 B)
📄 man.options.1(21.05 KB)
📄 man_html.c(13.39 KB)
📄 man_macro.c(11.4 KB)
📄 man_term.c(25.6 KB)
📄 man_validate.c(11.84 KB)
📄 manconf.h(1.56 KB)
📄 mandoc.1(54.89 KB)
📄 mandoc.3(12.5 KB)
📄 mandoc.c(12.41 KB)
📄 mandoc.css(8.63 KB)
📄 mandoc.db.5(5.74 KB)
📄 mandoc.h(14.92 KB)
📄 mandoc_aux.c(2.42 KB)
📄 mandoc_aux.h(1.31 KB)
📄 mandoc_char.7(29.23 KB)
📄 mandoc_escape.3(9.33 KB)
📄 mandoc_headers.3(12.41 KB)
📄 mandoc_html.3(7.42 KB)
📄 mandoc_malloc.3(4.46 KB)
📄 mandoc_msg.c(8.92 KB)
📄 mandoc_ohash.c(1.58 KB)
📄 mandoc_ohash.h(1004 B)
📄 mandoc_parse.h(1.82 KB)
📄 mandoc_xr.c(2.75 KB)
📄 mandoc_xr.h(1.17 KB)
📄 mandocd.8(4.59 KB)
📄 mandocd.c(5.98 KB)
📄 mandocdb.c(55.16 KB)
📄 manpath.c(7.73 KB)
📄 manpath.h(1.22 KB)
📄 mansearch.3(3.26 KB)
📄 mansearch.c(18.99 KB)
📄 mansearch.h(4.03 KB)
📄 mchars_alloc.3(5.24 KB)
📄 mdoc.7(73.34 KB)
📄 mdoc.c(9.99 KB)
📄 mdoc.h(3.96 KB)
📄 mdoc_argv.c(16.19 KB)
📄 mdoc_html.c(36.48 KB)
📄 mdoc_macro.c(39.55 KB)
📄 mdoc_man.c(37.07 KB)
📄 mdoc_markdown.c(33.41 KB)
📄 mdoc_state.c(5.24 KB)
📄 mdoc_term.c(43.69 KB)
📄 mdoc_validate.c(61.85 KB)
📄 msec.c(1.09 KB)
📄 msec.in(1.48 KB)
📄 out.c(13.61 KB)
📄 out.h(2.26 KB)
📄 preconv.c(3.84 KB)
📄 predefs.in(2.05 KB)
📄 read.c(16.44 KB)
📄 roff.7(61.96 KB)
📄 roff.c(98.93 KB)
📄 roff.h(8.85 KB)
📄 roff_html.c(2.92 KB)
📄 roff_int.h(4.08 KB)
📄 roff_term.c(5.36 KB)
📄 roff_validate.c(3.41 KB)
📄 soelim.1(2.6 KB)
📄 soelim.c(3.76 KB)
📄 st.c(4.33 KB)
📄 tag.c(6.65 KB)
📄 tag.h(1.09 KB)
📄 tbl.3(6.9 KB)
📄 tbl.7(10.91 KB)
📄 tbl.c(3.89 KB)
📄 tbl.h(4.43 KB)
📄 tbl_data.c(7.3 KB)
📄 tbl_html.c(5.74 KB)
📄 tbl_int.h(2.09 KB)
📄 tbl_layout.c(8.06 KB)
📄 tbl_opts.c(3.77 KB)
📄 tbl_parse.h(1.31 KB)
📄 tbl_term.c(24.42 KB)
📄 term.c(24.4 KB)
📄 term.h(6.14 KB)
📄 term_ascii.c(9.88 KB)
📄 term_ps.c(27.41 KB)
📄 term_tab.c(3 KB)
📄 test-EFTYPE.c(56 B)
📄 test-O_DIRECTORY.c(88 B)
📄 test-PATH_MAX.c(1.02 KB)
📄 test-be32toh.c(147 B)
📄 test-cmsg.c(174 B)
📄 test-dirent-namlen.c(124 B)
📄 test-err.c(994 B)
📄 test-fgetln.c(147 B)
📄 test-fts.c(964 B)
📄 test-getline.c(186 B)
📄 test-getsubopt.c(1.31 KB)
📄 test-isblank.c(96 B)
📄 test-mkdtemp.c(175 B)
📄 test-nanosleep.c(239 B)
📄 test-noop.c(30 B)
📄 test-ntohl.c(91 B)
📄 test-ohash.c(585 B)
📄 test-pledge.c(73 B)
📄 test-progname.c(118 B)
📄 test-reallocarray.c(75 B)
📄 test-recallocarray.c(132 B)
📄 test-recvmsg.c(100 B)
📄 test-rewb-bsd.c(618 B)
📄 test-rewb-sysv.c(610 B)
📄 test-sandbox_init.c(186 B)
📄 test-strcasestr.c(131 B)
📄 test-stringlist.c(1.14 KB)
📄 test-strlcat.c(166 B)
📄 test-strlcpy.c(148 B)
📄 test-strndup.c(141 B)
📄 test-strptime.c(212 B)
📄 test-strsep.c(183 B)
📄 test-strtonum.c(1.25 KB)
📄 test-vasprintf.c(1.25 KB)
📄 test-wchar.c(1.58 KB)
📄 tree.c(8.17 KB)

Editing: man_term.c

/*	$Id: man_term.c,v 1.232 2019/07/23 17:53:35 schwarze Exp $ */
/*
 * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2010-2015, 2017-2019 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 AUTHORS DISCLAIM ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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_aux.h"
#include "mandoc.h"
#include "roff.h"
#include "man.h"
#include "out.h"
#include "term.h"
#include "tag.h"
#include "main.h"

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

struct	mtermp {
	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 roff_node *n, \
			  const struct roff_meta *meta

struct	man_term_act {
	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 struct roff_meta *);
static	void		  print_man_foot(struct termp *,
				const struct roff_meta *);
static	void		  print_bvspace(struct termp *,
				const struct roff_node *, int);

static	int		  pre_B(DECL_ARGS);
static	int		  pre_DT(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_SY(DECL_ARGS);
static	int		  pre_TP(DECL_ARGS);
static	int		  pre_UR(DECL_ARGS);
static	int		  pre_abort(DECL_ARGS);
static	int		  pre_alternate(DECL_ARGS);
static	int		  pre_ign(DECL_ARGS);
static	int		  pre_in(DECL_ARGS);
static	int		  pre_literal(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_SY(DECL_ARGS);
static	void		  post_TP(DECL_ARGS);
static	void		  post_UR(DECL_ARGS);

static	void		  tag_man(struct termp *, struct roff_node *);

static const struct man_term_act man_term_acts[MAN_MAX - MAN_TH] = {
	{ NULL, NULL, 0 }, /* TH */
	{ pre_SH, post_SH, 0 }, /* SH */
	{ pre_SS, post_SH, 0 }, /* SS */
	{ pre_TP, post_TP, 0 }, /* TP */
	{ pre_TP, post_TP, 0 }, /* TQ */
	{ pre_abort, NULL, 0 }, /* LP */
	{ pre_PP, NULL, 0 }, /* PP */
	{ pre_abort, 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 */
	{ NULL, NULL, 0 }, /* RE */
	{ pre_RS, post_RS, 0 }, /* RS */
	{ pre_DT, 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_SY, post_SY, 0 }, /* SY */
	{ NULL, NULL, 0 }, /* YS */
	{ 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_UR, post_UR, 0 }, /* MT */
	{ NULL, NULL, 0 }, /* ME */
};
static const struct man_term_act *man_term_act(enum roff_tok);

static const struct man_term_act *
man_term_act(enum roff_tok tok)
{
	assert(tok >= MAN_TH && tok <= MAN_MAX);
	return man_term_acts + (tok - MAN_TH);
}

void
terminal_man(void *arg, const struct roff_meta *man)
{
	struct mtermp		 mt;
	struct termp		*p;
	struct roff_node	*n, *nc, *nn;
	size_t			 save_defindent;

p = (struct termp *)arg;
	save_defindent = p->defindent;
	if (p->synopsisonly == 0 && p->defindent == 0)
		p->defindent = 7;
	p->tcol->rmargin = p->maxrmargin = p->defrmargin;
	term_tab_set(p, NULL);
	term_tab_set(p, "T");
	term_tab_set(p, ".5i");

memset(&mt, 0, sizeof(mt));
	mt.lmargin[mt.lmargincur] = term_len(p, p->defindent);
	mt.offset = term_len(p, p->defindent);
	mt.pardist = 1;

n = man->first->child;
	if (p->synopsisonly) {
		for (nn = NULL; n != NULL; n = n->next) {
			if (n->tok != MAN_SH)
				continue;
			nc = n->child->child;
			if (nc->type != ROFFT_TEXT)
				continue;
			if (strcmp(nc->string, "SYNOPSIS") == 0)
				break;
			if (nn == NULL && strcmp(nc->string, "NAME") == 0)
				nn = n;
		}
		if (n == NULL)
			n = nn;
		p->flags |= TERMP_NOSPACE;
		if (n != NULL && (n = n->child->next->child) != NULL)
			print_man_nodelist(p, &mt, n, man);
		term_newln(p);
	} else {
		term_begin(p, print_man_head, print_man_foot, man);
		p->flags |= TERMP_NOSPACE;
		if (n != NULL)
			print_man_nodelist(p, &mt, n, man);
		term_end(p);
	}
	p->defindent = save_defindent;
}

/*
 * 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 roff_node *n, int pardist)
{
	int	 i;

term_newln(p);

if (n->body != NULL && n->body->child != NULL)
		if (n->body->child->type == ROFFT_TBL)
			return;

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

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

static int
pre_abort(DECL_ARGS)
{
	abort();
}

static int
pre_ign(DECL_ARGS)
{
	return 0;
}

static int
pre_I(DECL_ARGS)
{
	term_fontrepl(p, TERMFONT_UNDER);
	return 1;
}

static int
pre_literal(DECL_ARGS)
{
	term_newln(p);

/*
	 * 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 (n->parent->tok == MAN_HP && p->tcol->rmargin < p->maxrmargin) {
		p->tcol->offset = p->tcol->rmargin;
		p->tcol->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(n->type == ROFFT_TEXT);
	if (a2roffsu(n->string, &su, SCALE_VS) != NULL)
		mt->pardist = term_vspan(p, &su);
	return 0;
}

static int
pre_alternate(DECL_ARGS)
{
	enum termfont		 font[2];
	struct roff_node	*nn;
	int			 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();
	}
	for (i = 0, nn = n->child; nn != NULL; nn = nn->next, i = 1 - i) {
		term_fontrepl(p, font[i]);
		assert(nn->type == ROFFT_TEXT);
		term_word(p, nn->string);
		if (nn->flags & NODE_EOS)
			p->flags |= TERMP_SENTENCE;
		if (nn->next != NULL)
			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_KEEP | TERMP_NOSPACE;

if ((n = n->child) != NULL) {
		term_fontrepl(p, TERMFONT_BOLD);
		term_word(p, n->string);
	}
	if (n != NULL && n->next != NULL) {
		term_fontrepl(p, TERMFONT_UNDER);
		term_word(p, n->next->string);
	}
	term_fontrepl(p, TERMFONT_NONE);
	p->flags &= ~TERMP_KEEP;
	p->flags |= TERMP_NOSPACE;
	term_word(p, "]");
	return 0;
}

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

term_newln(p);

if (n->child == NULL) {
		p->tcol->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) == NULL)
		return 0;

v = term_hen(p, &su);

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

return 0;
}

static int
pre_DT(DECL_ARGS)
{
	term_tab_set(p, NULL);
	term_tab_set(p, "T");
	term_tab_set(p, ".5i");
	return 0;
}

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

switch (n->type) {
	case ROFFT_BLOCK:
		print_bvspace(p, n, mt->pardist);
		return 1;
	case ROFFT_HEAD:
		return 0;
	case ROFFT_BODY:
		break;
	default:
		abort();
	}

if (n->child == NULL)
		return 0;

if ((n->child->flags & NODE_NOFILL) == 0) {
		p->flags |= TERMP_NOBREAK | TERMP_BRIND;
		p->trailspace = 2;
	}

/* Calculate offset. */

if ((nn = n->parent->head->child) != NULL &&
	    a2roffsu(nn->string, &su, SCALE_EN) != NULL) {
		len = term_hen(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->tcol->offset = mt->offset;
	p->tcol->rmargin = mt->offset + len;
	return 1;
}

static void
post_HP(DECL_ARGS)
{
	switch (n->type) {
	case ROFFT_BLOCK:
	case ROFFT_HEAD:
		break;
	case ROFFT_BODY:
		term_newln(p);

/*
		 * Compatibility with a groff bug.
		 * The .HP macro uses the undocumented .tag request
		 * which causes a line break and cancels no-space
		 * mode even if there isn't any output.
		 */

if (n->child == NULL)
			term_vspace(p);

p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
		p->trailspace = 0;
		p->tcol->offset = mt->offset;
		p->tcol->rmargin = p->maxrmargin;
		break;
	default:
		abort();
	}
}

static int
pre_PP(DECL_ARGS)
{
	switch (n->type) {
	case ROFFT_BLOCK:
		mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
		print_bvspace(p, n, mt->pardist);
		break;
	case ROFFT_HEAD:
		return 0;
	case ROFFT_BODY:
		p->tcol->offset = mt->offset;
		break;
	default:
		abort();
	}
	return 1;
}

static int
pre_IP(DECL_ARGS)
{
	struct roffsu		 su;
	const struct roff_node	*nn;
	int			 len;

switch (n->type) {
	case ROFFT_BLOCK:
		print_bvspace(p, n, mt->pardist);
		return 1;
	case ROFFT_HEAD:
		p->flags |= TERMP_NOBREAK;
		p->trailspace = 1;
		break;
	case ROFFT_BODY:
		p->flags |= TERMP_NOSPACE;
		break;
	default:
		abort();
	}

/* 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) != NULL) {
		len = term_hen(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 ROFFT_HEAD:
		p->tcol->offset = mt->offset;
		p->tcol->rmargin = mt->offset + len;
		if (n->child != NULL) {
			print_man_node(p, mt, n->child, meta);
			tag_man(p, n->child);
		}
		return 0;
	case ROFFT_BODY:
		p->tcol->offset = mt->offset + len;
		p->tcol->rmargin = p->maxrmargin;
		break;
	default:
		abort();
	}
	return 1;
}

static void
post_IP(DECL_ARGS)
{
	switch (n->type) {
	case ROFFT_BLOCK:
		break;
	case ROFFT_HEAD:
		term_flushln(p);
		p->flags &= ~TERMP_NOBREAK;
		p->trailspace = 0;
		p->tcol->rmargin = p->maxrmargin;
		break;
	case ROFFT_BODY:
		term_newln(p);
		p->tcol->offset = mt->offset;
		break;
	default:
		abort();
	}
}

static int
pre_TP(DECL_ARGS)
{
	struct roffsu		 su;
	struct roff_node	*nn;
	int			 len;

switch (n->type) {
	case ROFFT_BLOCK:
		if (n->tok == MAN_TP)
			print_bvspace(p, n, mt->pardist);
		return 1;
	case ROFFT_HEAD:
		p->flags |= TERMP_NOBREAK | TERMP_BRTRSP;
		p->trailspace = 1;
		break;
	case ROFFT_BODY:
		p->flags |= TERMP_NOSPACE;
		break;
	default:
		abort();
	}

/* Calculate offset. */

if ((nn = n->parent->head->child) != NULL &&
	    nn->string != NULL && ! (NODE_LINE & nn->flags) &&
	    a2roffsu(nn->string, &su, SCALE_EN) != NULL) {
		len = term_hen(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 ROFFT_HEAD:
		p->tcol->offset = mt->offset;
		p->tcol->rmargin = mt->offset + len;

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

if (nn == NULL)
			return 0;

if (nn->type == ROFFT_TEXT)
			tag_man(p, nn);
		else if (nn->child != NULL &&
		    nn->child->type == ROFFT_TEXT &&
		    (nn->tok == MAN_B || nn->tok == MAN_BI ||
		     nn->tok == MAN_BR || nn->tok == MAN_I ||
		     nn->tok == MAN_IB || nn->tok == MAN_IR))
			tag_man(p, nn->child);

while (nn != NULL) {
			print_man_node(p, mt, nn, meta);
			nn = nn->next;
		}
		return 0;
	case ROFFT_BODY:
		p->tcol->offset = mt->offset + len;
		p->tcol->rmargin = p->maxrmargin;
		p->trailspace = 0;
		p->flags &= ~(TERMP_NOBREAK | TERMP_BRTRSP);
		break;
	default:
		abort();
	}
	return 1;
}

static void
post_TP(DECL_ARGS)
{
	switch (n->type) {
	case ROFFT_BLOCK:
		break;
	case ROFFT_HEAD:
		term_flushln(p);
		break;
	case ROFFT_BODY:
		term_newln(p);
		p->tcol->offset = mt->offset;
		break;
	default:
		abort();
	}
}

static int
pre_SS(DECL_ARGS)
{
	int	 i;

switch (n->type) {
	case ROFFT_BLOCK:
		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 && n->tok >= MAN_TH &&
		    man_term_act(n->tok)->flags & MAN_NOTEXT);
		if (n == NULL || n->type == ROFFT_COMMENT ||
		    (n->tok == MAN_SS && n->body->child == NULL))
			break;

for (i = 0; i < mt->pardist; i++)
			term_vspace(p);
		break;
	case ROFFT_HEAD:
		term_fontrepl(p, TERMFONT_BOLD);
		p->tcol->offset = term_len(p, 3);
		p->tcol->rmargin = mt->offset;
		p->trailspace = mt->offset;
		p->flags |= TERMP_NOBREAK | TERMP_BRIND;
		break;
	case ROFFT_BODY:
		p->tcol->offset = mt->offset;
		p->tcol->rmargin = p->maxrmargin;
		p->trailspace = 0;
		p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
		break;
	default:
		break;
	}
	return 1;
}

static int
pre_SH(DECL_ARGS)
{
	int	 i;

switch (n->type) {
	case ROFFT_BLOCK:
		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 && n->tok >= MAN_TH &&
		    man_term_act(n->tok)->flags & MAN_NOTEXT);
		if (n == NULL || n->type == ROFFT_COMMENT ||
		    (n->tok == MAN_SH && n->body->child == NULL))
			break;

for (i = 0; i < mt->pardist; i++)
			term_vspace(p);
		break;
	case ROFFT_HEAD:
		term_fontrepl(p, TERMFONT_BOLD);
		p->tcol->offset = 0;
		p->tcol->rmargin = mt->offset;
		p->trailspace = mt->offset;
		p->flags |= TERMP_NOBREAK | TERMP_BRIND;
		break;
	case ROFFT_BODY:
		p->tcol->offset = mt->offset;
		p->tcol->rmargin = p->maxrmargin;
		p->trailspace = 0;
		p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
		break;
	default:
		abort();
	}
	return 1;
}

static void
post_SH(DECL_ARGS)
{
	switch (n->type) {
	case ROFFT_BLOCK:
		break;
	case ROFFT_HEAD:
	case ROFFT_BODY:
		term_newln(p);
		break;
	default:
		abort();
	}
}

static int
pre_RS(DECL_ARGS)
{
	struct roffsu	 su;

switch (n->type) {
	case ROFFT_BLOCK:
		term_newln(p);
		return 1;
	case ROFFT_HEAD:
		return 0;
	case ROFFT_BODY:
		break;
	default:
		abort();
	}

n = n->parent->head;
	n->aux = SHRT_MAX + 1;
	if (n->child == NULL)
		n->aux = mt->lmargin[mt->lmargincur];
	else if (a2roffsu(n->child->string, &su, SCALE_EN) != NULL)
		n->aux = term_hen(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->tcol->offset = mt->offset;
	p->tcol->rmargin = p->maxrmargin;

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

mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
	return 1;
}

static void
post_RS(DECL_ARGS)
{
	switch (n->type) {
	case ROFFT_BLOCK:
	case ROFFT_HEAD:
		return;
	case ROFFT_BODY:
		break;
	default:
		abort();
	}
	term_newln(p);
	mt->offset -= n->parent->head->aux;
	p->tcol->offset = mt->offset;
	if (--mt->lmarginsz < MAXMARGINS)
		mt->lmargincur = mt->lmarginsz;
}

static int
pre_SY(DECL_ARGS)
{
	const struct roff_node	*nn;
	int			 len;

switch (n->type) {
	case ROFFT_BLOCK:
		if (n->prev == NULL || n->prev->tok != MAN_SY)
			print_bvspace(p, n, mt->pardist);
		return 1;
	case ROFFT_HEAD:
	case ROFFT_BODY:
		break;
	default:
		abort();
	}

nn = n->parent->head->child;
	len = nn == NULL ? 1 : term_strlen(p, nn->string) + 1;

switch (n->type) {
	case ROFFT_HEAD:
		p->tcol->offset = mt->offset;
		p->tcol->rmargin = mt->offset + len;
		if (n->next->child == NULL ||
		    (n->next->child->flags & NODE_NOFILL) == 0)
			p->flags |= TERMP_NOBREAK;
		term_fontrepl(p, TERMFONT_BOLD);
		break;
	case ROFFT_BODY:
		mt->lmargin[mt->lmargincur] = len;
		p->tcol->offset = mt->offset + len;
		p->tcol->rmargin = p->maxrmargin;
		p->flags |= TERMP_NOSPACE;
		break;
	default:
		abort();
	}
	return 1;
}

static void
post_SY(DECL_ARGS)
{
	switch (n->type) {
	case ROFFT_BLOCK:
		break;
	case ROFFT_HEAD:
		term_flushln(p);
		p->flags &= ~TERMP_NOBREAK;
		break;
	case ROFFT_BODY:
		term_newln(p);
		p->tcol->offset = mt->offset;
		break;
	default:
		abort();
	}
}

static int
pre_UR(DECL_ARGS)
{
	return n->type != ROFFT_HEAD;
}

static void
post_UR(DECL_ARGS)
{
	if (n->type != ROFFT_BLOCK)
		return;

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

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

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

static void
print_man_node(DECL_ARGS)
{
	const struct man_term_act *act;
	int c;

switch (n->type) {
	case ROFFT_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 (*n->string == '\0') {
			if (p->flags & TERMP_NONEWLINE)
				term_newln(p);
			else
				term_vspace(p);
			return;
		} else if (*n->string == ' ' && n->flags & NODE_LINE &&
		    (p->flags & TERMP_NONEWLINE) == 0)
			term_newln(p);
		else if (n->flags & NODE_DELIMC)
			p->flags |= TERMP_NOSPACE;

term_word(p, n->string);
		goto out;
	case ROFFT_COMMENT:
		return;
	case ROFFT_EQN:
		if ( ! (n->flags & NODE_LINE))
			p->flags |= TERMP_NOSPACE;
		term_eqn(p, n->eqn);
		if (n->next != NULL && ! (n->next->flags & NODE_LINE))
			p->flags |= TERMP_NOSPACE;
		return;
	case ROFFT_TBL:
		if (p->tbl.cols == NULL)
			term_vspace(p);
		term_tbl(p, n->span);
		return;
	default:
		break;
	}

if (n->tok < ROFF_MAX) {
		roff_term_pre(p, n);
		return;
	}

act = man_term_act(n->tok);
	if ((act->flags & MAN_NOTEXT) == 0 && n->tok != MAN_SM)
		term_fontrepl(p, TERMFONT_NONE);

c = 1;
	if (act->pre != NULL)
		c = (*act->pre)(p, mt, n, meta);

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

if (act->post != NULL)
		(*act->post)(p, mt, n, meta);
	if ((act->flags & MAN_NOTEXT) == 0 && n->tok != MAN_SM)
		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 (n->flags & NODE_NOFILL &&
	    ! (p->flags & (TERMP_NOBREAK | TERMP_NONEWLINE)) &&
	    (n->next == NULL || n->next->flags & NODE_LINE)) {
		p->flags |= TERMP_BRNEVER | TERMP_NOSPACE;
		if (n->string != NULL && *n->string != '\0')
			term_flushln(p);
		else
			term_newln(p);
		p->flags &= ~TERMP_BRNEVER;
		if (p->tcol->rmargin < p->maxrmargin &&
		    n->parent->tok == MAN_HP) {
			p->tcol->offset = p->tcol->rmargin;
			p->tcol->rmargin = p->maxrmargin;
		}
	}
	if (n->flags & NODE_EOS)
		p->flags |= TERMP_SENTENCE;
}

static void
print_man_nodelist(DECL_ARGS)
{
	while (n != NULL) {
		print_man_node(p, mt, n, meta);
		n = n->next;
	}
}

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

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 operating system
	 * 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->os != NULL) {
		title = mandoc_strdup(meta->os);
	} else {
		title = mandoc_strdup("");
	}
	datelen = term_strlen(p, meta->date);

/* Bottom left corner: operating system. */

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

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

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

p->tcol->offset = p->tcol->rmargin;
	titlen = term_strlen(p, title);
	p->tcol->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->tcol->offset = p->tcol->rmargin;
	p->tcol->rmargin = p->maxrmargin;

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

/*
	 * Reset the terminal state for more output after the footer:
	 * Some output modes, in particular PostScript and PDF, print
	 * the header and the footer into a buffer such that it can be
	 * reused for multiple output pages, then go on to format the
	 * main text.
	 */

p->tcol->offset = 0;
        p->flags = 0;

free(title);
}

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

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->tcol->offset = 0;
	p->tcol->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->tcol->offset = p->tcol->rmargin;
	p->tcol->rmargin = p->tcol->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->tcol->rmargin + titlen <= p->maxrmargin) {
		p->flags |= TERMP_NOSPACE;
		p->tcol->offset = p->tcol->rmargin;
		p->tcol->rmargin = p->maxrmargin;
		term_word(p, title);
		term_flushln(p);
	}

p->flags &= ~TERMP_NOSPACE;
	p->tcol->offset = 0;
	p->tcol->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);
}

/*
 * Skip leading whitespace, dashes, backslashes, and font escapes,
 * then create a tag if the first following byte is a letter.
 * Priority is high unless whitespace is present.
 */
static void
tag_man(struct termp *p, struct roff_node *n)
{
	const char	*cp, *arg;
	int		 prio, sz;

assert(n->type == ROFFT_TEXT);
	cp = n->string;
	prio = 1;
	for (;;) {
		switch (*cp) {
		case ' ':
		case '\t':
			prio = INT_MAX;
			/* FALLTHROUGH */
		case '-':
			cp++;
			break;
		case '\\':
			cp++;
			switch (mandoc_escape(&cp, &arg, &sz)) {
			case ESCAPE_FONT:
			case ESCAPE_FONTROMAN:
			case ESCAPE_FONTITALIC:
			case ESCAPE_FONTBOLD:
			case ESCAPE_FONTPREV:
			case ESCAPE_FONTBI:
				break;
			case ESCAPE_SPECIAL:
				if (sz != 1)
					return;
				switch (*arg) {
				case '&':
				case '-':
				case 'e':
					break;
				default:
					return;
				}
				break;
			default:
				return;
			}
			break;
		default:
			if (isalpha((unsigned char)*cp))
				tag_put(cp, prio, p->line);
			return;
		}
	}
}

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