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Diffstat (limited to 'usr.bin/mandoc/man_term.c')
-rw-r--r--usr.bin/mandoc/man_term.c1149
1 files changed, 1149 insertions, 0 deletions
diff --git a/usr.bin/mandoc/man_term.c b/usr.bin/mandoc/man_term.c
new file mode 100644
index 0000000..3bf25ad
--- /dev/null
+++ b/usr.bin/mandoc/man_term.c
@@ -0,0 +1,1149 @@
+/* $OpenBSD: man_term.c,v 1.188 2020/03/13 00:31:05 schwarze Exp $ */
+/*
+ * Copyright (c) 2010-2015, 2017-2020 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE 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 <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) {
+ 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);
+}