1 /* $Id: man_term.c,v 1.232 2019/07/23 17:53:35 schwarze Exp $ */
3 * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2010-2015, 2017-2019 Ingo Schwarze <schwarze@openbsd.org>
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #include <sys/types.h>
29 #include "mandoc_aux.h"
38 #define MAXMARGINS 64 /* maximum number of indented scopes */
41 int lmargin[MAXMARGINS]; /* margins (incl. vis. page) */
42 int lmargincur; /* index of current margin */
43 int lmarginsz; /* actual number of nested margins */
44 size_t offset; /* default offset to visible page */
45 int pardist; /* vert. space before par., unit: [v] */
48 #define DECL_ARGS struct termp *p, \
50 struct roff_node *n, \
51 const struct roff_meta *meta
54 int (*pre)(DECL_ARGS);
55 void (*post)(DECL_ARGS);
57 #define MAN_NOTEXT (1 << 0) /* Never has text children. */
60 static void print_man_nodelist(DECL_ARGS);
61 static void print_man_node(DECL_ARGS);
62 static void print_man_head(struct termp *,
63 const struct roff_meta *);
64 static void print_man_foot(struct termp *,
65 const struct roff_meta *);
66 static void print_bvspace(struct termp *,
67 const struct roff_node *, int);
69 static int pre_B(DECL_ARGS);
70 static int pre_DT(DECL_ARGS);
71 static int pre_HP(DECL_ARGS);
72 static int pre_I(DECL_ARGS);
73 static int pre_IP(DECL_ARGS);
74 static int pre_OP(DECL_ARGS);
75 static int pre_PD(DECL_ARGS);
76 static int pre_PP(DECL_ARGS);
77 static int pre_RS(DECL_ARGS);
78 static int pre_SH(DECL_ARGS);
79 static int pre_SS(DECL_ARGS);
80 static int pre_SY(DECL_ARGS);
81 static int pre_TP(DECL_ARGS);
82 static int pre_UR(DECL_ARGS);
83 static int pre_abort(DECL_ARGS);
84 static int pre_alternate(DECL_ARGS);
85 static int pre_ign(DECL_ARGS);
86 static int pre_in(DECL_ARGS);
87 static int pre_literal(DECL_ARGS);
89 static void post_IP(DECL_ARGS);
90 static void post_HP(DECL_ARGS);
91 static void post_RS(DECL_ARGS);
92 static void post_SH(DECL_ARGS);
93 static void post_SY(DECL_ARGS);
94 static void post_TP(DECL_ARGS);
95 static void post_UR(DECL_ARGS);
97 static void tag_man(struct termp *, struct roff_node *);
99 static const struct man_term_act man_term_acts[MAN_MAX - MAN_TH] = {
100 { NULL, NULL, 0 }, /* TH */
101 { pre_SH, post_SH, 0 }, /* SH */
102 { pre_SS, post_SH, 0 }, /* SS */
103 { pre_TP, post_TP, 0 }, /* TP */
104 { pre_TP, post_TP, 0 }, /* TQ */
105 { pre_abort, NULL, 0 }, /* LP */
106 { pre_PP, NULL, 0 }, /* PP */
107 { pre_abort, NULL, 0 }, /* P */
108 { pre_IP, post_IP, 0 }, /* IP */
109 { pre_HP, post_HP, 0 }, /* HP */
110 { NULL, NULL, 0 }, /* SM */
111 { pre_B, NULL, 0 }, /* SB */
112 { pre_alternate, NULL, 0 }, /* BI */
113 { pre_alternate, NULL, 0 }, /* IB */
114 { pre_alternate, NULL, 0 }, /* BR */
115 { pre_alternate, NULL, 0 }, /* RB */
116 { NULL, NULL, 0 }, /* R */
117 { pre_B, NULL, 0 }, /* B */
118 { pre_I, NULL, 0 }, /* I */
119 { pre_alternate, NULL, 0 }, /* IR */
120 { pre_alternate, NULL, 0 }, /* RI */
121 { NULL, NULL, 0 }, /* RE */
122 { pre_RS, post_RS, 0 }, /* RS */
123 { pre_DT, NULL, 0 }, /* DT */
124 { pre_ign, NULL, MAN_NOTEXT }, /* UC */
125 { pre_PD, NULL, MAN_NOTEXT }, /* PD */
126 { pre_ign, NULL, 0 }, /* AT */
127 { pre_in, NULL, MAN_NOTEXT }, /* in */
128 { pre_SY, post_SY, 0 }, /* SY */
129 { NULL, NULL, 0 }, /* YS */
130 { pre_OP, NULL, 0 }, /* OP */
131 { pre_literal, NULL, 0 }, /* EX */
132 { pre_literal, NULL, 0 }, /* EE */
133 { pre_UR, post_UR, 0 }, /* UR */
134 { NULL, NULL, 0 }, /* UE */
135 { pre_UR, post_UR, 0 }, /* MT */
136 { NULL, NULL, 0 }, /* ME */
138 static const struct man_term_act *man_term_act(enum roff_tok);
141 static const struct man_term_act *
142 man_term_act(enum roff_tok tok)
144 assert(tok >= MAN_TH && tok <= MAN_MAX);
145 return man_term_acts + (tok - MAN_TH);
149 terminal_man(void *arg, const struct roff_meta *man)
153 struct roff_node *n, *nc, *nn;
154 size_t save_defindent;
156 p = (struct termp *)arg;
157 save_defindent = p->defindent;
158 if (p->synopsisonly == 0 && p->defindent == 0)
160 p->tcol->rmargin = p->maxrmargin = p->defrmargin;
161 term_tab_set(p, NULL);
162 term_tab_set(p, "T");
163 term_tab_set(p, ".5i");
165 memset(&mt, 0, sizeof(mt));
166 mt.lmargin[mt.lmargincur] = term_len(p, p->defindent);
167 mt.offset = term_len(p, p->defindent);
170 n = man->first->child;
171 if (p->synopsisonly) {
172 for (nn = NULL; n != NULL; n = n->next) {
173 if (n->tok != MAN_SH)
175 nc = n->child->child;
176 if (nc->type != ROFFT_TEXT)
178 if (strcmp(nc->string, "SYNOPSIS") == 0)
180 if (nn == NULL && strcmp(nc->string, "NAME") == 0)
185 p->flags |= TERMP_NOSPACE;
186 if (n != NULL && (n = n->child->next->child) != NULL)
187 print_man_nodelist(p, &mt, n, man);
190 term_begin(p, print_man_head, print_man_foot, man);
191 p->flags |= TERMP_NOSPACE;
193 print_man_nodelist(p, &mt, n, man);
196 p->defindent = save_defindent;
200 * Printing leading vertical space before a block.
201 * This is used for the paragraph macros.
202 * The rules are pretty simple, since there's very little nesting going
203 * on here. Basically, if we're the first within another block (SS/SH),
204 * then don't emit vertical space. If we are (RS), then do. If not the
208 print_bvspace(struct termp *p, const struct roff_node *n, int pardist)
214 if (n->body != NULL && n->body->child != NULL)
215 if (n->body->child->type == ROFFT_TBL)
218 if (n->parent->type == ROFFT_ROOT || n->parent->tok != MAN_RS)
222 for (i = 0; i < pardist; i++)
242 term_fontrepl(p, TERMFONT_UNDER);
247 pre_literal(DECL_ARGS)
252 * Unlike .IP and .TP, .HP does not have a HEAD.
253 * So in case a second call to term_flushln() is needed,
254 * indentation has to be set up explicitly.
256 if (n->parent->tok == MAN_HP && p->tcol->rmargin < p->maxrmargin) {
257 p->tcol->offset = p->tcol->rmargin;
258 p->tcol->rmargin = p->maxrmargin;
260 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
261 p->flags |= TERMP_NOSPACE;
276 assert(n->type == ROFFT_TEXT);
277 if (a2roffsu(n->string, &su, SCALE_VS) != NULL)
278 mt->pardist = term_vspan(p, &su);
283 pre_alternate(DECL_ARGS)
285 enum termfont font[2];
286 struct roff_node *nn;
291 font[0] = TERMFONT_NONE;
292 font[1] = TERMFONT_BOLD;
295 font[0] = TERMFONT_NONE;
296 font[1] = TERMFONT_UNDER;
299 font[0] = TERMFONT_BOLD;
300 font[1] = TERMFONT_NONE;
303 font[0] = TERMFONT_BOLD;
304 font[1] = TERMFONT_UNDER;
307 font[0] = TERMFONT_UNDER;
308 font[1] = TERMFONT_NONE;
311 font[0] = TERMFONT_UNDER;
312 font[1] = TERMFONT_BOLD;
317 for (i = 0, nn = n->child; nn != NULL; nn = nn->next, i = 1 - i) {
318 term_fontrepl(p, font[i]);
319 assert(nn->type == ROFFT_TEXT);
320 term_word(p, nn->string);
321 if (nn->flags & NODE_EOS)
322 p->flags |= TERMP_SENTENCE;
323 if (nn->next != NULL)
324 p->flags |= TERMP_NOSPACE;
332 term_fontrepl(p, TERMFONT_BOLD);
340 p->flags |= TERMP_KEEP | TERMP_NOSPACE;
342 if ((n = n->child) != NULL) {
343 term_fontrepl(p, TERMFONT_BOLD);
344 term_word(p, n->string);
346 if (n != NULL && n->next != NULL) {
347 term_fontrepl(p, TERMFONT_UNDER);
348 term_word(p, n->next->string);
350 term_fontrepl(p, TERMFONT_NONE);
351 p->flags &= ~TERMP_KEEP;
352 p->flags |= TERMP_NOSPACE;
367 if (n->child == NULL) {
368 p->tcol->offset = mt->offset;
372 cp = n->child->string;
382 if (a2roffsu(++cp, &su, SCALE_EN) == NULL)
385 v = term_hen(p, &su);
388 p->tcol->offset -= p->tcol->offset > v ? v : p->tcol->offset;
390 p->tcol->offset += v;
393 if (p->tcol->offset > SHRT_MAX)
394 p->tcol->offset = term_len(p, p->defindent);
402 term_tab_set(p, NULL);
403 term_tab_set(p, "T");
404 term_tab_set(p, ".5i");
412 const struct roff_node *nn;
417 print_bvspace(p, n, mt->pardist);
427 if (n->child == NULL)
430 if ((n->child->flags & NODE_NOFILL) == 0) {
431 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
435 /* Calculate offset. */
437 if ((nn = n->parent->head->child) != NULL &&
438 a2roffsu(nn->string, &su, SCALE_EN) != NULL) {
439 len = term_hen(p, &su);
440 if (len < 0 && (size_t)(-len) > mt->offset)
442 else if (len > SHRT_MAX)
443 len = term_len(p, p->defindent);
444 mt->lmargin[mt->lmargincur] = len;
446 len = mt->lmargin[mt->lmargincur];
448 p->tcol->offset = mt->offset;
449 p->tcol->rmargin = mt->offset + len;
464 * Compatibility with a groff bug.
465 * The .HP macro uses the undocumented .tag request
466 * which causes a line break and cancels no-space
467 * mode even if there isn't any output.
470 if (n->child == NULL)
473 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
475 p->tcol->offset = mt->offset;
476 p->tcol->rmargin = p->maxrmargin;
488 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
489 print_bvspace(p, n, mt->pardist);
494 p->tcol->offset = mt->offset;
506 const struct roff_node *nn;
511 print_bvspace(p, n, mt->pardist);
514 p->flags |= TERMP_NOBREAK;
518 p->flags |= TERMP_NOSPACE;
524 /* Calculate the offset from the optional second argument. */
525 if ((nn = n->parent->head->child) != NULL &&
526 (nn = nn->next) != NULL &&
527 a2roffsu(nn->string, &su, SCALE_EN) != NULL) {
528 len = term_hen(p, &su);
529 if (len < 0 && (size_t)(-len) > mt->offset)
531 else if (len > SHRT_MAX)
532 len = term_len(p, p->defindent);
533 mt->lmargin[mt->lmargincur] = len;
535 len = mt->lmargin[mt->lmargincur];
539 p->tcol->offset = mt->offset;
540 p->tcol->rmargin = mt->offset + len;
541 if (n->child != NULL) {
542 print_man_node(p, mt, n->child, meta);
543 tag_man(p, n->child);
547 p->tcol->offset = mt->offset + len;
548 p->tcol->rmargin = p->maxrmargin;
564 p->flags &= ~TERMP_NOBREAK;
566 p->tcol->rmargin = p->maxrmargin;
570 p->tcol->offset = mt->offset;
581 struct roff_node *nn;
586 if (n->tok == MAN_TP)
587 print_bvspace(p, n, mt->pardist);
590 p->flags |= TERMP_NOBREAK | TERMP_BRTRSP;
594 p->flags |= TERMP_NOSPACE;
600 /* Calculate offset. */
602 if ((nn = n->parent->head->child) != NULL &&
603 nn->string != NULL && ! (NODE_LINE & nn->flags) &&
604 a2roffsu(nn->string, &su, SCALE_EN) != NULL) {
605 len = term_hen(p, &su);
606 if (len < 0 && (size_t)(-len) > mt->offset)
608 else if (len > SHRT_MAX)
609 len = term_len(p, p->defindent);
610 mt->lmargin[mt->lmargincur] = len;
612 len = mt->lmargin[mt->lmargincur];
616 p->tcol->offset = mt->offset;
617 p->tcol->rmargin = mt->offset + len;
619 /* Don't print same-line elements. */
621 while (nn != NULL && (nn->flags & NODE_LINE) == 0)
627 if (nn->type == ROFFT_TEXT)
629 else if (nn->child != NULL &&
630 nn->child->type == ROFFT_TEXT &&
631 (nn->tok == MAN_B || nn->tok == MAN_BI ||
632 nn->tok == MAN_BR || nn->tok == MAN_I ||
633 nn->tok == MAN_IB || nn->tok == MAN_IR))
634 tag_man(p, nn->child);
637 print_man_node(p, mt, nn, meta);
642 p->tcol->offset = mt->offset + len;
643 p->tcol->rmargin = p->maxrmargin;
645 p->flags &= ~(TERMP_NOBREAK | TERMP_BRTRSP);
664 p->tcol->offset = mt->offset;
678 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
679 mt->offset = term_len(p, p->defindent);
682 * No vertical space before the first subsection
683 * and after an empty subsection.
688 } while (n != NULL && n->tok >= MAN_TH &&
689 man_term_act(n->tok)->flags & MAN_NOTEXT);
690 if (n == NULL || n->type == ROFFT_COMMENT ||
691 (n->tok == MAN_SS && n->body->child == NULL))
694 for (i = 0; i < mt->pardist; i++)
698 term_fontrepl(p, TERMFONT_BOLD);
699 p->tcol->offset = term_len(p, 3);
700 p->tcol->rmargin = mt->offset;
701 p->trailspace = mt->offset;
702 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
705 p->tcol->offset = mt->offset;
706 p->tcol->rmargin = p->maxrmargin;
708 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
723 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
724 mt->offset = term_len(p, p->defindent);
727 * No vertical space before the first section
728 * and after an empty section.
733 } while (n != NULL && n->tok >= MAN_TH &&
734 man_term_act(n->tok)->flags & MAN_NOTEXT);
735 if (n == NULL || n->type == ROFFT_COMMENT ||
736 (n->tok == MAN_SH && n->body->child == NULL))
739 for (i = 0; i < mt->pardist; i++)
743 term_fontrepl(p, TERMFONT_BOLD);
745 p->tcol->rmargin = mt->offset;
746 p->trailspace = mt->offset;
747 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
750 p->tcol->offset = mt->offset;
751 p->tcol->rmargin = p->maxrmargin;
753 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
794 n->aux = SHRT_MAX + 1;
795 if (n->child == NULL)
796 n->aux = mt->lmargin[mt->lmargincur];
797 else if (a2roffsu(n->child->string, &su, SCALE_EN) != NULL)
798 n->aux = term_hen(p, &su);
799 if (n->aux < 0 && (size_t)(-n->aux) > mt->offset)
800 n->aux = -mt->offset;
801 else if (n->aux > SHRT_MAX)
802 n->aux = term_len(p, p->defindent);
804 mt->offset += n->aux;
805 p->tcol->offset = mt->offset;
806 p->tcol->rmargin = p->maxrmargin;
808 if (++mt->lmarginsz < MAXMARGINS)
809 mt->lmargincur = mt->lmarginsz;
811 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
828 mt->offset -= n->parent->head->aux;
829 p->tcol->offset = mt->offset;
830 if (--mt->lmarginsz < MAXMARGINS)
831 mt->lmargincur = mt->lmarginsz;
837 const struct roff_node *nn;
842 if (n->prev == NULL || n->prev->tok != MAN_SY)
843 print_bvspace(p, n, mt->pardist);
852 nn = n->parent->head->child;
853 len = nn == NULL ? 1 : term_strlen(p, nn->string) + 1;
857 p->tcol->offset = mt->offset;
858 p->tcol->rmargin = mt->offset + len;
859 if (n->next->child == NULL ||
860 (n->next->child->flags & NODE_NOFILL) == 0)
861 p->flags |= TERMP_NOBREAK;
862 term_fontrepl(p, TERMFONT_BOLD);
865 mt->lmargin[mt->lmargincur] = len;
866 p->tcol->offset = mt->offset + len;
867 p->tcol->rmargin = p->maxrmargin;
868 p->flags |= TERMP_NOSPACE;
884 p->flags &= ~TERMP_NOBREAK;
888 p->tcol->offset = mt->offset;
898 return n->type != ROFFT_HEAD;
904 if (n->type != ROFFT_BLOCK)
908 p->flags |= TERMP_NOSPACE;
910 if (n->child->child != NULL)
911 print_man_node(p, mt, n->child->child, meta);
913 p->flags |= TERMP_NOSPACE;
918 print_man_node(DECL_ARGS)
920 const struct man_term_act *act;
926 * If we have a blank line, output a vertical space.
927 * If we have a space as the first character, break
928 * before printing the line's data.
930 if (*n->string == '\0') {
931 if (p->flags & TERMP_NONEWLINE)
936 } else if (*n->string == ' ' && n->flags & NODE_LINE &&
937 (p->flags & TERMP_NONEWLINE) == 0)
939 else if (n->flags & NODE_DELIMC)
940 p->flags |= TERMP_NOSPACE;
942 term_word(p, n->string);
947 if ( ! (n->flags & NODE_LINE))
948 p->flags |= TERMP_NOSPACE;
950 if (n->next != NULL && ! (n->next->flags & NODE_LINE))
951 p->flags |= TERMP_NOSPACE;
954 if (p->tbl.cols == NULL)
956 term_tbl(p, n->span);
962 if (n->tok < ROFF_MAX) {
967 act = man_term_act(n->tok);
968 if ((act->flags & MAN_NOTEXT) == 0 && n->tok != MAN_SM)
969 term_fontrepl(p, TERMFONT_NONE);
972 if (act->pre != NULL)
973 c = (*act->pre)(p, mt, n, meta);
975 if (c && n->child != NULL)
976 print_man_nodelist(p, mt, n->child, meta);
978 if (act->post != NULL)
979 (*act->post)(p, mt, n, meta);
980 if ((act->flags & MAN_NOTEXT) == 0 && n->tok != MAN_SM)
981 term_fontrepl(p, TERMFONT_NONE);
985 * If we're in a literal context, make sure that words
986 * together on the same line stay together. This is a
987 * POST-printing call, so we check the NEXT word. Since
988 * -man doesn't have nested macros, we don't need to be
989 * more specific than this.
991 if (n->flags & NODE_NOFILL &&
992 ! (p->flags & (TERMP_NOBREAK | TERMP_NONEWLINE)) &&
993 (n->next == NULL || n->next->flags & NODE_LINE)) {
994 p->flags |= TERMP_BRNEVER | TERMP_NOSPACE;
995 if (n->string != NULL && *n->string != '\0')
999 p->flags &= ~TERMP_BRNEVER;
1000 if (p->tcol->rmargin < p->maxrmargin &&
1001 n->parent->tok == MAN_HP) {
1002 p->tcol->offset = p->tcol->rmargin;
1003 p->tcol->rmargin = p->maxrmargin;
1006 if (n->flags & NODE_EOS)
1007 p->flags |= TERMP_SENTENCE;
1011 print_man_nodelist(DECL_ARGS)
1014 print_man_node(p, mt, n, meta);
1020 print_man_foot(struct termp *p, const struct roff_meta *meta)
1023 size_t datelen, titlen;
1025 assert(meta->title);
1029 term_fontrepl(p, TERMFONT_NONE);
1035 * Temporary, undocumented option to imitate mdoc(7) output.
1036 * In the bottom right corner, use the operating system
1037 * instead of the title.
1040 if ( ! p->mdocstyle) {
1041 if (meta->hasbody) {
1045 mandoc_asprintf(&title, "%s(%s)",
1046 meta->title, meta->msec);
1047 } else if (meta->os != NULL) {
1048 title = mandoc_strdup(meta->os);
1050 title = mandoc_strdup("");
1052 datelen = term_strlen(p, meta->date);
1054 /* Bottom left corner: operating system. */
1056 p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
1058 p->tcol->offset = 0;
1059 p->tcol->rmargin = p->maxrmargin > datelen ?
1060 (p->maxrmargin + term_len(p, 1) - datelen) / 2 : 0;
1063 term_word(p, meta->os);
1066 /* At the bottom in the middle: manual date. */
1068 p->tcol->offset = p->tcol->rmargin;
1069 titlen = term_strlen(p, title);
1070 p->tcol->rmargin = p->maxrmargin > titlen ?
1071 p->maxrmargin - titlen : 0;
1072 p->flags |= TERMP_NOSPACE;
1074 term_word(p, meta->date);
1077 /* Bottom right corner: manual title and section. */
1079 p->flags &= ~TERMP_NOBREAK;
1080 p->flags |= TERMP_NOSPACE;
1082 p->tcol->offset = p->tcol->rmargin;
1083 p->tcol->rmargin = p->maxrmargin;
1085 term_word(p, title);
1089 * Reset the terminal state for more output after the footer:
1090 * Some output modes, in particular PostScript and PDF, print
1091 * the header and the footer into a buffer such that it can be
1092 * reused for multiple output pages, then go on to format the
1096 p->tcol->offset = 0;
1103 print_man_head(struct termp *p, const struct roff_meta *meta)
1107 size_t vollen, titlen;
1109 assert(meta->title);
1112 volume = NULL == meta->vol ? "" : meta->vol;
1113 vollen = term_strlen(p, volume);
1115 /* Top left corner: manual title and section. */
1117 mandoc_asprintf(&title, "%s(%s)", meta->title, meta->msec);
1118 titlen = term_strlen(p, title);
1120 p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
1122 p->tcol->offset = 0;
1123 p->tcol->rmargin = 2 * (titlen+1) + vollen < p->maxrmargin ?
1124 (p->maxrmargin - vollen + term_len(p, 1)) / 2 :
1125 vollen < p->maxrmargin ? p->maxrmargin - vollen : 0;
1127 term_word(p, title);
1130 /* At the top in the middle: manual volume. */
1132 p->flags |= TERMP_NOSPACE;
1133 p->tcol->offset = p->tcol->rmargin;
1134 p->tcol->rmargin = p->tcol->offset + vollen + titlen <
1135 p->maxrmargin ? p->maxrmargin - titlen : p->maxrmargin;
1137 term_word(p, volume);
1140 /* Top right corner: title and section, again. */
1142 p->flags &= ~TERMP_NOBREAK;
1144 if (p->tcol->rmargin + titlen <= p->maxrmargin) {
1145 p->flags |= TERMP_NOSPACE;
1146 p->tcol->offset = p->tcol->rmargin;
1147 p->tcol->rmargin = p->maxrmargin;
1148 term_word(p, title);
1152 p->flags &= ~TERMP_NOSPACE;
1153 p->tcol->offset = 0;
1154 p->tcol->rmargin = p->maxrmargin;
1157 * Groff prints three blank lines before the content.
1158 * Do the same, except in the temporary, undocumented
1159 * mode imitating mdoc(7) output.
1163 if ( ! p->mdocstyle) {
1171 * Skip leading whitespace, dashes, backslashes, and font escapes,
1172 * then create a tag if the first following byte is a letter.
1173 * Priority is high unless whitespace is present.
1176 tag_man(struct termp *p, struct roff_node *n)
1178 const char *cp, *arg;
1181 assert(n->type == ROFFT_TEXT);
1195 switch (mandoc_escape(&cp, &arg, &sz)) {
1197 case ESCAPE_FONTROMAN:
1198 case ESCAPE_FONTITALIC:
1199 case ESCAPE_FONTBOLD:
1200 case ESCAPE_FONTPREV:
1203 case ESCAPE_SPECIAL:
1220 if (isalpha((unsigned char)*cp))
1221 tag_put(cp, prio, p->line);