Annotation of src/usr.bin/mandoc/eqn_term.c, Revision 1.10
1.10 ! schwarze 1: /* $OpenBSD: eqn_term.c,v 1.9 2017/07/08 14:51:01 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:
26: #include "mandoc.h"
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;
1.8 schwarze 53: int delim;
54:
55: /* Delimiters around this box? */
1.1 schwarze 56:
1.6 schwarze 57: if ((bp->type == EQN_LIST && bp->expectargs > 1) ||
1.3 schwarze 58: (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
1.8 schwarze 59: (bp->parent != NULL && (bp->parent->pos == EQNPOS_SQRT ||
60: /* Diacritic followed by ^ or _. */
61: ((bp->top != NULL || bp->bottom != NULL) &&
62: bp->parent->type == EQN_SUBEXPR &&
63: bp->parent->pos != EQNPOS_OVER && bp->next != NULL) ||
64: /* Nested over, sub, sup, from, to. */
65: (bp->type == EQN_SUBEXPR && bp->pos != EQNPOS_SQRT &&
66: ((bp->parent->type == EQN_LIST && bp->expectargs == 1) ||
67: (bp->parent->type == EQN_SUBEXPR &&
68: bp->pos != EQNPOS_SQRT)))))) {
1.10 ! schwarze 69: if ((bp->parent->type == EQN_SUBEXPR && bp->prev != NULL) ||
! 70: (bp->type == EQN_LIST &&
! 71: bp->first != NULL &&
! 72: bp->first->type != EQN_PILE &&
! 73: bp->first->type != EQN_MATRIX &&
! 74: bp->prev != NULL &&
! 75: (bp->prev->type == EQN_LIST ||
! 76: (bp->prev->type == EQN_TEXT &&
! 77: (*bp->prev->text == '\\' ||
! 78: isalpha((unsigned char)*bp->prev->text))))))
1.3 schwarze 79: p->flags |= TERMP_NOSPACE;
80: term_word(p, bp->left != NULL ? bp->left : "(");
81: p->flags |= TERMP_NOSPACE;
1.8 schwarze 82: delim = 1;
83: } else
84: delim = 0;
85:
86: /* Handle Fonts and text. */
87:
1.3 schwarze 88: if (bp->font != EQNFONT_NONE)
1.1 schwarze 89: term_fontpush(p, fontmap[(int)bp->font]);
90:
1.3 schwarze 91: if (bp->text != NULL)
1.1 schwarze 92: term_word(p, bp->text);
93:
1.8 schwarze 94: /* Special box types. */
95:
1.3 schwarze 96: if (bp->pos == EQNPOS_SQRT) {
97: term_word(p, "sqrt");
1.5 schwarze 98: if (bp->first != NULL) {
99: p->flags |= TERMP_NOSPACE;
100: eqn_box(p, bp->first);
101: }
1.3 schwarze 102: } else if (bp->type == EQN_SUBEXPR) {
103: child = bp->first;
104: eqn_box(p, child);
105: p->flags |= TERMP_NOSPACE;
106: term_word(p, bp->pos == EQNPOS_OVER ? "/" :
107: (bp->pos == EQNPOS_SUP ||
108: bp->pos == EQNPOS_TO) ? "^" : "_");
109: child = child->next;
1.4 schwarze 110: if (child != NULL) {
1.10 ! schwarze 111: p->flags |= TERMP_NOSPACE;
1.3 schwarze 112: eqn_box(p, child);
1.4 schwarze 113: if (bp->pos == EQNPOS_FROMTO ||
114: bp->pos == EQNPOS_SUBSUP) {
115: p->flags |= TERMP_NOSPACE;
116: term_word(p, "^");
117: p->flags |= TERMP_NOSPACE;
118: child = child->next;
119: if (child != NULL)
120: eqn_box(p, child);
121: }
1.3 schwarze 122: }
123: } else {
124: child = bp->first;
1.5 schwarze 125: if (bp->type == EQN_MATRIX &&
1.6 schwarze 126: child != NULL &&
127: child->type == EQN_LIST &&
128: child->expectargs > 1)
1.3 schwarze 129: child = child->first;
130: while (child != NULL) {
131: eqn_box(p,
132: bp->type == EQN_PILE &&
133: child->type == EQN_LIST &&
1.6 schwarze 134: child->expectargs > 1 &&
1.3 schwarze 135: child->args == 1 ?
136: child->first : child);
137: child = child->next;
138: }
139: }
1.1 schwarze 140:
1.8 schwarze 141: /* Handle Fonts and diacritics. */
142:
1.3 schwarze 143: if (bp->font != EQNFONT_NONE)
1.1 schwarze 144: term_fontpop(p);
1.7 schwarze 145: if (bp->top != NULL) {
146: p->flags |= TERMP_NOSPACE;
147: term_word(p, bp->top);
148: }
149: if (bp->bottom != NULL) {
150: p->flags |= TERMP_NOSPACE;
151: term_word(p, "_");
152: }
1.8 schwarze 153:
154: /* Right delimiter after this box? */
155:
156: if (delim) {
1.3 schwarze 157: p->flags |= TERMP_NOSPACE;
158: term_word(p, bp->right != NULL ? bp->right : ")");
159: if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
160: p->flags |= TERMP_NOSPACE;
161: }
1.1 schwarze 162: }
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