1 /* $Id: man_term.c,v 1.188 2017/01/10 13:47:00 schwarze Exp $ */
3 * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2010-2015 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"
37 #define MAXMARGINS 64 /* maximum number of indented scopes */
41 #define MANT_LITERAL (1 << 0)
42 int lmargin[MAXMARGINS]; /* margins (incl. vis. page) */
43 int lmargincur; /* index of current margin */
44 int lmarginsz; /* actual number of nested margins */
45 size_t offset; /* default offset to visible page */
46 int pardist; /* vert. space before par., unit: [v] */
49 #define DECL_ARGS struct termp *p, \
51 struct roff_node *n, \
52 const struct roff_meta *meta
55 int (*pre)(DECL_ARGS);
56 void (*post)(DECL_ARGS);
58 #define MAN_NOTEXT (1 << 0) /* Never has text children. */
61 static void print_man_nodelist(DECL_ARGS);
62 static void print_man_node(DECL_ARGS);
63 static void print_man_head(struct termp *,
64 const struct roff_meta *);
65 static void print_man_foot(struct termp *,
66 const struct roff_meta *);
67 static void print_bvspace(struct termp *,
68 const struct roff_node *, int);
70 static int pre_B(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_TP(DECL_ARGS);
81 static int pre_UR(DECL_ARGS);
82 static int pre_alternate(DECL_ARGS);
83 static int pre_ft(DECL_ARGS);
84 static int pre_ign(DECL_ARGS);
85 static int pre_in(DECL_ARGS);
86 static int pre_literal(DECL_ARGS);
87 static int pre_ll(DECL_ARGS);
88 static int pre_sp(DECL_ARGS);
90 static void post_IP(DECL_ARGS);
91 static void post_HP(DECL_ARGS);
92 static void post_RS(DECL_ARGS);
93 static void post_SH(DECL_ARGS);
94 static void post_SS(DECL_ARGS);
95 static void post_TP(DECL_ARGS);
96 static void post_UR(DECL_ARGS);
98 static const struct termact termacts[MAN_MAX] = {
99 { pre_sp, NULL, MAN_NOTEXT }, /* br */
100 { NULL, NULL, 0 }, /* TH */
101 { pre_SH, post_SH, 0 }, /* SH */
102 { pre_SS, post_SS, 0 }, /* SS */
103 { pre_TP, post_TP, 0 }, /* TP */
104 { pre_PP, NULL, 0 }, /* LP */
105 { pre_PP, NULL, 0 }, /* PP */
106 { pre_PP, NULL, 0 }, /* P */
107 { pre_IP, post_IP, 0 }, /* IP */
108 { pre_HP, post_HP, 0 }, /* HP */
109 { NULL, NULL, 0 }, /* SM */
110 { pre_B, NULL, 0 }, /* SB */
111 { pre_alternate, NULL, 0 }, /* BI */
112 { pre_alternate, NULL, 0 }, /* IB */
113 { pre_alternate, NULL, 0 }, /* BR */
114 { pre_alternate, NULL, 0 }, /* RB */
115 { NULL, NULL, 0 }, /* R */
116 { pre_B, NULL, 0 }, /* B */
117 { pre_I, NULL, 0 }, /* I */
118 { pre_alternate, NULL, 0 }, /* IR */
119 { pre_alternate, NULL, 0 }, /* RI */
120 { pre_sp, NULL, MAN_NOTEXT }, /* sp */
121 { pre_literal, NULL, 0 }, /* nf */
122 { pre_literal, NULL, 0 }, /* fi */
123 { NULL, NULL, 0 }, /* RE */
124 { pre_RS, post_RS, 0 }, /* RS */
125 { pre_ign, NULL, 0 }, /* DT */
126 { pre_ign, NULL, MAN_NOTEXT }, /* UC */
127 { pre_PD, NULL, MAN_NOTEXT }, /* PD */
128 { pre_ign, NULL, 0 }, /* AT */
129 { pre_in, NULL, MAN_NOTEXT }, /* in */
130 { pre_ft, NULL, MAN_NOTEXT }, /* ft */
131 { pre_OP, NULL, 0 }, /* OP */
132 { pre_literal, NULL, 0 }, /* EX */
133 { pre_literal, NULL, 0 }, /* EE */
134 { pre_UR, post_UR, 0 }, /* UR */
135 { NULL, NULL, 0 }, /* UE */
136 { pre_ll, NULL, MAN_NOTEXT }, /* ll */
141 terminal_man(void *arg, const struct roff_man *man)
147 p = (struct termp *)arg;
149 p->rmargin = p->maxrmargin = p->defrmargin;
150 p->tabwidth = term_len(p, 5);
152 memset(&mt, 0, sizeof(struct mtermp));
153 mt.lmargin[mt.lmargincur] = term_len(p, p->defindent);
154 mt.offset = term_len(p, p->defindent);
157 n = man->first->child;
158 if (p->synopsisonly) {
160 if (n->tok == MAN_SH &&
161 n->child->child->type == ROFFT_TEXT &&
162 !strcmp(n->child->child->string, "SYNOPSIS")) {
163 if (n->child->next->child != NULL)
164 print_man_nodelist(p, &mt,
165 n->child->next->child,
173 if (p->defindent == 0)
175 term_begin(p, print_man_head, print_man_foot, &man->meta);
176 p->flags |= TERMP_NOSPACE;
178 print_man_nodelist(p, &mt, n, &man->meta);
184 * Printing leading vertical space before a block.
185 * This is used for the paragraph macros.
186 * The rules are pretty simple, since there's very little nesting going
187 * on here. Basically, if we're the first within another block (SS/SH),
188 * then don't emit vertical space. If we are (RS), then do. If not the
192 print_bvspace(struct termp *p, const struct roff_node *n, int pardist)
198 if (n->body && n->body->child)
199 if (n->body->child->type == ROFFT_TBL)
202 if (n->parent->type == ROFFT_ROOT || n->parent->tok != MAN_RS)
206 for (i = 0; i < pardist; i++)
222 term_setwidth(p, n->child != NULL ? n->child->string : NULL);
230 term_fontrepl(p, TERMFONT_UNDER);
235 pre_literal(DECL_ARGS)
240 if (MAN_nf == n->tok || MAN_EX == n->tok)
241 mt->fl |= MANT_LITERAL;
243 mt->fl &= ~MANT_LITERAL;
246 * Unlike .IP and .TP, .HP does not have a HEAD.
247 * So in case a second call to term_flushln() is needed,
248 * indentation has to be set up explicitly.
250 if (MAN_HP == n->parent->tok && p->rmargin < p->maxrmargin) {
251 p->offset = p->rmargin;
252 p->rmargin = p->maxrmargin;
254 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
255 p->flags |= TERMP_NOSPACE;
271 assert(n->type == ROFFT_TEXT);
272 if (a2roffsu(n->string, &su, SCALE_VS))
273 mt->pardist = term_vspan(p, &su);
278 pre_alternate(DECL_ARGS)
280 enum termfont font[2];
281 struct roff_node *nn;
286 font[0] = TERMFONT_NONE;
287 font[1] = TERMFONT_BOLD;
290 font[0] = TERMFONT_NONE;
291 font[1] = TERMFONT_UNDER;
294 font[0] = TERMFONT_BOLD;
295 font[1] = TERMFONT_NONE;
298 font[0] = TERMFONT_BOLD;
299 font[1] = TERMFONT_UNDER;
302 font[0] = TERMFONT_UNDER;
303 font[1] = TERMFONT_NONE;
306 font[0] = TERMFONT_UNDER;
307 font[1] = TERMFONT_BOLD;
313 savelit = MANT_LITERAL & mt->fl;
314 mt->fl &= ~MANT_LITERAL;
316 for (i = 0, nn = n->child; nn; nn = nn->next, i = 1 - i) {
317 term_fontrepl(p, font[i]);
318 if (savelit && NULL == nn->next)
319 mt->fl |= MANT_LITERAL;
320 assert(nn->type == ROFFT_TEXT);
321 term_word(p, nn->string);
322 if (nn->flags & NODE_EOS)
323 p->flags |= TERMP_SENTENCE;
325 p->flags |= TERMP_NOSPACE;
335 term_fontrepl(p, TERMFONT_BOLD);
344 p->flags |= TERMP_NOSPACE;
346 if (NULL != (n = n->child)) {
347 term_fontrepl(p, TERMFONT_BOLD);
348 term_word(p, n->string);
350 if (NULL != n && NULL != n->next) {
351 term_fontrepl(p, TERMFONT_UNDER);
352 term_word(p, n->next->string);
355 term_fontrepl(p, TERMFONT_NONE);
356 p->flags |= TERMP_NOSPACE;
366 if (NULL == n->child) {
371 cp = n->child->string;
376 term_fontrepl(p, TERMFONT_BOLD);
380 term_fontrepl(p, TERMFONT_UNDER);
388 term_fontrepl(p, TERMFONT_NONE);
406 if (NULL == n->child) {
407 p->offset = mt->offset;
411 cp = n->child->string;
421 if ( ! a2roffsu(++cp, &su, SCALE_EN))
424 v = (term_hspan(p, &su) + 11) / 24;
427 p->offset -= p->offset > v ? v : p->offset;
432 if (p->offset > SHRT_MAX)
433 p->offset = term_len(p, p->defindent);
444 if ((NULL == n->prev && n->parent)) {
445 switch (n->parent->tok) {
457 if (n->tok == MAN_br)
459 else if (n->child == NULL)
462 if ( ! a2roffsu(n->child->string, &su, SCALE_VS))
464 len = term_vspan(p, &su);
472 for (i = 0; i < len; i++)
476 * Handle an explicit break request in the same way
477 * as an overflowing line.
480 if (p->flags & TERMP_BRIND) {
481 p->offset = p->rmargin;
482 p->rmargin = p->maxrmargin;
483 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
493 const struct roff_node *nn;
498 print_bvspace(p, n, mt->pardist);
506 if ( ! (MANT_LITERAL & mt->fl)) {
507 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
511 /* Calculate offset. */
513 if ((nn = n->parent->head->child) != NULL &&
514 a2roffsu(nn->string, &su, SCALE_EN)) {
515 len = term_hspan(p, &su) / 24;
516 if (len < 0 && (size_t)(-len) > mt->offset)
518 else if (len > SHRT_MAX)
519 len = term_len(p, p->defindent);
520 mt->lmargin[mt->lmargincur] = len;
522 len = mt->lmargin[mt->lmargincur];
524 p->offset = mt->offset;
525 p->rmargin = mt->offset + len;
538 * Compatibility with a groff bug.
539 * The .HP macro uses the undocumented .tag request
540 * which causes a line break and cancels no-space
541 * mode even if there isn't any output.
544 if (n->child == NULL)
547 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
549 p->offset = mt->offset;
550 p->rmargin = p->maxrmargin;
563 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
564 print_bvspace(p, n, mt->pardist);
567 p->offset = mt->offset;
571 return n->type != ROFFT_HEAD;
578 const struct roff_node *nn;
583 p->flags |= TERMP_NOSPACE;
586 p->flags |= TERMP_NOBREAK;
590 print_bvspace(p, n, mt->pardist);
596 /* Calculate the offset from the optional second argument. */
597 if ((nn = n->parent->head->child) != NULL &&
598 (nn = nn->next) != NULL &&
599 a2roffsu(nn->string, &su, SCALE_EN)) {
600 len = term_hspan(p, &su) / 24;
601 if (len < 0 && (size_t)(-len) > mt->offset)
603 else if (len > SHRT_MAX)
604 len = term_len(p, p->defindent);
605 mt->lmargin[mt->lmargincur] = len;
607 len = mt->lmargin[mt->lmargincur];
611 p->offset = mt->offset;
612 p->rmargin = mt->offset + len;
614 savelit = MANT_LITERAL & mt->fl;
615 mt->fl &= ~MANT_LITERAL;
618 print_man_node(p, mt, n->child, meta);
621 mt->fl |= MANT_LITERAL;
625 p->offset = mt->offset + len;
626 p->rmargin = p->maxrmargin;
642 p->flags &= ~TERMP_NOBREAK;
644 p->rmargin = p->maxrmargin;
648 p->offset = mt->offset;
659 struct roff_node *nn;
664 p->flags |= TERMP_NOBREAK | TERMP_BRTRSP;
668 p->flags |= TERMP_NOSPACE;
671 print_bvspace(p, n, mt->pardist);
677 /* Calculate offset. */
679 if ((nn = n->parent->head->child) != NULL &&
680 nn->string != NULL && ! (NODE_LINE & nn->flags) &&
681 a2roffsu(nn->string, &su, SCALE_EN)) {
682 len = term_hspan(p, &su) / 24;
683 if (len < 0 && (size_t)(-len) > mt->offset)
685 else if (len > SHRT_MAX)
686 len = term_len(p, p->defindent);
687 mt->lmargin[mt->lmargincur] = len;
689 len = mt->lmargin[mt->lmargincur];
693 p->offset = mt->offset;
694 p->rmargin = mt->offset + len;
696 savelit = MANT_LITERAL & mt->fl;
697 mt->fl &= ~MANT_LITERAL;
699 /* Don't print same-line elements. */
701 while (NULL != nn && 0 == (NODE_LINE & nn->flags))
705 print_man_node(p, mt, nn, meta);
710 mt->fl |= MANT_LITERAL;
713 p->offset = mt->offset + len;
714 p->rmargin = p->maxrmargin;
716 p->flags &= ~(TERMP_NOBREAK | TERMP_BRTRSP);
735 p->offset = mt->offset;
749 mt->fl &= ~MANT_LITERAL;
750 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
751 mt->offset = term_len(p, p->defindent);
754 * No vertical space before the first subsection
755 * and after an empty subsection.
760 } while (n != NULL && n->tok != TOKEN_NONE &&
761 termacts[n->tok].flags & MAN_NOTEXT);
762 if (n == NULL || (n->tok == MAN_SS && n->body->child == NULL))
765 for (i = 0; i < mt->pardist; i++)
769 term_fontrepl(p, TERMFONT_BOLD);
770 p->offset = term_len(p, 3);
771 p->rmargin = mt->offset;
772 p->trailspace = mt->offset;
773 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
776 p->offset = mt->offset;
777 p->rmargin = p->maxrmargin;
779 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
811 mt->fl &= ~MANT_LITERAL;
812 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
813 mt->offset = term_len(p, p->defindent);
816 * No vertical space before the first section
817 * and after an empty section.
822 } while (n != NULL && termacts[n->tok].flags & MAN_NOTEXT);
823 if (n == NULL || (n->tok == MAN_SH && n->body->child == NULL))
826 for (i = 0; i < mt->pardist; i++)
830 term_fontrepl(p, TERMFONT_BOLD);
832 p->rmargin = mt->offset;
833 p->trailspace = mt->offset;
834 p->flags |= TERMP_NOBREAK | TERMP_BRIND;
837 p->offset = mt->offset;
838 p->rmargin = p->maxrmargin;
840 p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
881 n->aux = SHRT_MAX + 1;
882 if (n->child == NULL)
883 n->aux = mt->lmargin[mt->lmargincur];
884 else if (a2roffsu(n->child->string, &su, SCALE_EN))
885 n->aux = term_hspan(p, &su) / 24;
886 if (n->aux < 0 && (size_t)(-n->aux) > mt->offset)
887 n->aux = -mt->offset;
888 else if (n->aux > SHRT_MAX)
889 n->aux = term_len(p, p->defindent);
891 mt->offset += n->aux;
892 p->offset = mt->offset;
893 p->rmargin = p->maxrmargin;
895 if (++mt->lmarginsz < MAXMARGINS)
896 mt->lmargincur = mt->lmarginsz;
898 mt->lmargin[mt->lmargincur] = term_len(p, p->defindent);
916 mt->offset -= n->parent->head->aux;
917 p->offset = mt->offset;
919 if (--mt->lmarginsz < MAXMARGINS)
920 mt->lmargincur = mt->lmarginsz;
927 return n->type != ROFFT_HEAD;
934 if (n->type != ROFFT_BLOCK)
938 p->flags |= TERMP_NOSPACE;
940 if (NULL != n->child->child)
941 print_man_node(p, mt, n->child->child, meta);
943 p->flags |= TERMP_NOSPACE;
948 print_man_node(DECL_ARGS)
956 * If we have a blank line, output a vertical space.
957 * If we have a space as the first character, break
958 * before printing the line's data.
960 if ('\0' == *n->string) {
963 } else if (' ' == *n->string && NODE_LINE & n->flags)
966 term_word(p, n->string);
970 if ( ! (n->flags & NODE_LINE))
971 p->flags |= TERMP_NOSPACE;
973 if (n->next != NULL && ! (n->next->flags & NODE_LINE))
974 p->flags |= TERMP_NOSPACE;
977 if (p->tbl.cols == NULL)
979 term_tbl(p, n->span);
985 if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
986 term_fontrepl(p, TERMFONT_NONE);
989 if (termacts[n->tok].pre)
990 c = (*termacts[n->tok].pre)(p, mt, n, meta);
993 print_man_nodelist(p, mt, n->child, meta);
995 if (termacts[n->tok].post)
996 (*termacts[n->tok].post)(p, mt, n, meta);
997 if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
998 term_fontrepl(p, TERMFONT_NONE);
1002 * If we're in a literal context, make sure that words
1003 * together on the same line stay together. This is a
1004 * POST-printing call, so we check the NEXT word. Since
1005 * -man doesn't have nested macros, we don't need to be
1006 * more specific than this.
1008 if (mt->fl & MANT_LITERAL &&
1009 ! (p->flags & (TERMP_NOBREAK | TERMP_NONEWLINE)) &&
1010 (n->next == NULL || n->next->flags & NODE_LINE)) {
1012 rmax = p->maxrmargin;
1013 p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
1014 p->flags |= TERMP_NOSPACE;
1015 if (n->string != NULL && *n->string != '\0')
1019 if (rm < rmax && n->parent->tok == MAN_HP) {
1024 p->maxrmargin = rmax;
1026 if (NODE_EOS & n->flags)
1027 p->flags |= TERMP_SENTENCE;
1032 print_man_nodelist(DECL_ARGS)
1036 print_man_node(p, mt, n, meta);
1042 print_man_foot(struct termp *p, const struct roff_meta *meta)
1045 size_t datelen, titlen;
1047 assert(meta->title);
1051 term_fontrepl(p, TERMFONT_NONE);
1057 * Temporary, undocumented option to imitate mdoc(7) output.
1058 * In the bottom right corner, use the operating system
1059 * instead of the title.
1062 if ( ! p->mdocstyle) {
1063 if (meta->hasbody) {
1067 mandoc_asprintf(&title, "%s(%s)",
1068 meta->title, meta->msec);
1069 } else if (meta->os) {
1070 title = mandoc_strdup(meta->os);
1072 title = mandoc_strdup("");
1074 datelen = term_strlen(p, meta->date);
1076 /* Bottom left corner: operating system. */
1078 p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
1081 p->rmargin = p->maxrmargin > datelen ?
1082 (p->maxrmargin + term_len(p, 1) - datelen) / 2 : 0;
1085 term_word(p, meta->os);
1088 /* At the bottom in the middle: manual date. */
1090 p->offset = p->rmargin;
1091 titlen = term_strlen(p, title);
1092 p->rmargin = p->maxrmargin > titlen ? p->maxrmargin - titlen : 0;
1093 p->flags |= TERMP_NOSPACE;
1095 term_word(p, meta->date);
1098 /* Bottom right corner: manual title and section. */
1100 p->flags &= ~TERMP_NOBREAK;
1101 p->flags |= TERMP_NOSPACE;
1103 p->offset = p->rmargin;
1104 p->rmargin = p->maxrmargin;
1106 term_word(p, title);
1112 print_man_head(struct termp *p, const struct roff_meta *meta)
1116 size_t vollen, titlen;
1118 assert(meta->title);
1121 volume = NULL == meta->vol ? "" : meta->vol;
1122 vollen = term_strlen(p, volume);
1124 /* Top left corner: manual title and section. */
1126 mandoc_asprintf(&title, "%s(%s)", meta->title, meta->msec);
1127 titlen = term_strlen(p, title);
1129 p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
1132 p->rmargin = 2 * (titlen+1) + vollen < p->maxrmargin ?
1133 (p->maxrmargin - vollen + term_len(p, 1)) / 2 :
1134 vollen < p->maxrmargin ? p->maxrmargin - vollen : 0;
1136 term_word(p, title);
1139 /* At the top in the middle: manual volume. */
1141 p->flags |= TERMP_NOSPACE;
1142 p->offset = p->rmargin;
1143 p->rmargin = p->offset + vollen + titlen < p->maxrmargin ?
1144 p->maxrmargin - titlen : p->maxrmargin;
1146 term_word(p, volume);
1149 /* Top right corner: title and section, again. */
1151 p->flags &= ~TERMP_NOBREAK;
1153 if (p->rmargin + titlen <= p->maxrmargin) {
1154 p->flags |= TERMP_NOSPACE;
1155 p->offset = p->rmargin;
1156 p->rmargin = p->maxrmargin;
1157 term_word(p, title);
1161 p->flags &= ~TERMP_NOSPACE;
1163 p->rmargin = p->maxrmargin;
1166 * Groff prints three blank lines before the content.
1167 * Do the same, except in the temporary, undocumented
1168 * mode imitating mdoc(7) output.
1172 if ( ! p->mdocstyle) {