Annotation of src/usr.bin/mandoc/eqn_term.c, Revision 1.15
1.15 ! schwarze 1: /* $OpenBSD: eqn_term.c,v 1.14 2018/10/02 12:14:44 schwarze Exp $ */
1.1 schwarze 2: /*
3: * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.5 schwarze 4: * Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 5: *
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.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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.
17: */
1.3 schwarze 18: #include <sys/types.h>
19:
1.1 schwarze 20: #include <assert.h>
1.10 schwarze 21: #include <ctype.h>
1.1 schwarze 22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25:
1.15 ! schwarze 26: #include "eqn.h"
1.1 schwarze 27: #include "out.h"
28: #include "term.h"
29:
30: static const enum termfont fontmap[EQNFONT__MAX] = {
31: TERMFONT_NONE, /* EQNFONT_NONE */
32: TERMFONT_NONE, /* EQNFONT_ROMAN */
33: TERMFONT_BOLD, /* EQNFONT_BOLD */
34: TERMFONT_BOLD, /* EQNFONT_FAT */
35: TERMFONT_UNDER /* EQNFONT_ITALIC */
36: };
37:
38: static void eqn_box(struct termp *, const struct eqn_box *);
39:
1.2 schwarze 40:
1.1 schwarze 41: void
1.9 schwarze 42: term_eqn(struct termp *p, const struct eqn_box *bp)
1.1 schwarze 43: {
44:
1.9 schwarze 45: eqn_box(p, bp);
1.3 schwarze 46: p->flags &= ~TERMP_NOSPACE;
1.1 schwarze 47: }
48:
49: static void
50: eqn_box(struct termp *p, const struct eqn_box *bp)
51: {
1.3 schwarze 52: const struct eqn_box *child;
1.12 schwarze 53: const char *cp;
1.8 schwarze 54: int delim;
55:
56: /* Delimiters around this box? */
1.1 schwarze 57:
1.6 schwarze 58: if ((bp->type == EQN_LIST && bp->expectargs > 1) ||
1.3 schwarze 59: (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
1.8 schwarze 60: (bp->parent != NULL && (bp->parent->pos == EQNPOS_SQRT ||
61: /* Diacritic followed by ^ or _. */
62: ((bp->top != NULL || bp->bottom != NULL) &&
63: bp->parent->type == EQN_SUBEXPR &&
64: bp->parent->pos != EQNPOS_OVER && bp->next != NULL) ||
65: /* Nested over, sub, sup, from, to. */
66: (bp->type == EQN_SUBEXPR && bp->pos != EQNPOS_SQRT &&
67: ((bp->parent->type == EQN_LIST && bp->expectargs == 1) ||
68: (bp->parent->type == EQN_SUBEXPR &&
69: bp->pos != EQNPOS_SQRT)))))) {
1.10 schwarze 70: if ((bp->parent->type == EQN_SUBEXPR && bp->prev != NULL) ||
71: (bp->type == EQN_LIST &&
72: bp->first != NULL &&
73: bp->first->type != EQN_PILE &&
74: bp->first->type != EQN_MATRIX &&
75: bp->prev != NULL &&
76: (bp->prev->type == EQN_LIST ||
77: (bp->prev->type == EQN_TEXT &&
78: (*bp->prev->text == '\\' ||
79: isalpha((unsigned char)*bp->prev->text))))))
1.3 schwarze 80: p->flags |= TERMP_NOSPACE;
81: term_word(p, bp->left != NULL ? bp->left : "(");
82: p->flags |= TERMP_NOSPACE;
1.8 schwarze 83: delim = 1;
84: } else
85: delim = 0;
86:
87: /* Handle Fonts and text. */
88:
1.3 schwarze 89: if (bp->font != EQNFONT_NONE)
1.1 schwarze 90: term_fontpush(p, fontmap[(int)bp->font]);
91:
1.11 schwarze 92: if (bp->text != NULL) {
93: if (strchr("!\"'),.:;?]}", *bp->text) != NULL)
94: p->flags |= TERMP_NOSPACE;
1.1 schwarze 95: term_word(p, bp->text);
1.12 schwarze 96: if ((cp = strchr(bp->text, '\0')) > bp->text &&
1.13 schwarze 97: (strchr("\"'([{", cp[-1]) != NULL ||
98: (bp->prev == NULL && (cp[-1] == '-' ||
99: (cp >= bp->text + 5 &&
100: strcmp(cp - 5, "\\[mi]") == 0)))))
1.11 schwarze 101: p->flags |= TERMP_NOSPACE;
102: }
1.1 schwarze 103:
1.8 schwarze 104: /* Special box types. */
105:
1.3 schwarze 106: if (bp->pos == EQNPOS_SQRT) {
1.14 schwarze 107: term_word(p, "\\(sr");
1.5 schwarze 108: if (bp->first != NULL) {
109: p->flags |= TERMP_NOSPACE;
110: eqn_box(p, bp->first);
111: }
1.3 schwarze 112: } else if (bp->type == EQN_SUBEXPR) {
113: child = bp->first;
114: eqn_box(p, child);
115: p->flags |= TERMP_NOSPACE;
116: term_word(p, bp->pos == EQNPOS_OVER ? "/" :
117: (bp->pos == EQNPOS_SUP ||
118: bp->pos == EQNPOS_TO) ? "^" : "_");
119: child = child->next;
1.4 schwarze 120: if (child != NULL) {
1.10 schwarze 121: p->flags |= TERMP_NOSPACE;
1.3 schwarze 122: eqn_box(p, child);
1.4 schwarze 123: if (bp->pos == EQNPOS_FROMTO ||
124: bp->pos == EQNPOS_SUBSUP) {
125: p->flags |= TERMP_NOSPACE;
126: term_word(p, "^");
127: p->flags |= TERMP_NOSPACE;
128: child = child->next;
129: if (child != NULL)
130: eqn_box(p, child);
131: }
1.3 schwarze 132: }
133: } else {
134: child = bp->first;
1.5 schwarze 135: if (bp->type == EQN_MATRIX &&
1.6 schwarze 136: child != NULL &&
137: child->type == EQN_LIST &&
138: child->expectargs > 1)
1.3 schwarze 139: child = child->first;
140: while (child != NULL) {
141: eqn_box(p,
142: bp->type == EQN_PILE &&
143: child->type == EQN_LIST &&
1.6 schwarze 144: child->expectargs > 1 &&
1.3 schwarze 145: child->args == 1 ?
146: child->first : child);
147: child = child->next;
148: }
149: }
1.1 schwarze 150:
1.8 schwarze 151: /* Handle Fonts and diacritics. */
152:
1.3 schwarze 153: if (bp->font != EQNFONT_NONE)
1.1 schwarze 154: term_fontpop(p);
1.7 schwarze 155: if (bp->top != NULL) {
156: p->flags |= TERMP_NOSPACE;
157: term_word(p, bp->top);
158: }
159: if (bp->bottom != NULL) {
160: p->flags |= TERMP_NOSPACE;
161: term_word(p, "_");
162: }
1.8 schwarze 163:
164: /* Right delimiter after this box? */
165:
166: if (delim) {
1.3 schwarze 167: p->flags |= TERMP_NOSPACE;
168: term_word(p, bp->right != NULL ? bp->right : ")");
169: if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
170: p->flags |= TERMP_NOSPACE;
171: }
1.1 schwarze 172: }
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