/* Id: man_term.c,v 1.236 2021/06/28 19:50:15 schwarze Exp */

/* Id: man_term.c,v 1.236 2021/06/28 19:50:15 schwarze Exp */
/*
* Copyright (c) 2010-2015, 2017-2020 Ingo Schwarze <[email protected]>
* Copyright (c) 2008-2012 Kristaps Dzonsons <[email protected]>
*
* 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.
*
* Plain text formatter for man(7), used by mandoc(1)
* for ASCII, UTF-8, PostScript, and PDF output.
*/
#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 "term_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 *,
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 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, struct roff_node *n, int pardist)
{
struct roff_node *nch;
int i;

term_newln(p);

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

if (n->parent->tok != MAN_RS && roff_node_prev(n) == 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);
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;

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.
*/

if ((n = roff_node_prev(n)) == NULL ||
(n->tok == MAN_SS && roff_node_child(n->body) == 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.
*/

if ((n = roff_node_prev(n)) == NULL ||
(n->tok == MAN_SH && roff_node_child(n->body) == 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 ((nn = roff_node_prev(n)) == NULL || nn->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;

if (n->flags & NODE_ID)
term_tag_write(n, p->line);

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) {
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);
free(title);
}