Annotation of mandoc/eqn_term.c, Revision 1.12
1.12 ! schwarze 1: /* $Id: eqn_term.c,v 1.11 2017/07/06 00:19:54 schwarze Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.9 schwarze 4: * Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 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: */
18: #include "config.h"
1.6 schwarze 19:
20: #include <sys/types.h>
1.1 kristaps 21:
22: #include <assert.h>
23: #include <stdio.h>
24: #include <stdlib.h>
25: #include <string.h>
26:
27: #include "mandoc.h"
28: #include "out.h"
29: #include "term.h"
30:
1.4 kristaps 31: static const enum termfont fontmap[EQNFONT__MAX] = {
32: TERMFONT_NONE, /* EQNFONT_NONE */
33: TERMFONT_NONE, /* EQNFONT_ROMAN */
34: TERMFONT_BOLD, /* EQNFONT_BOLD */
35: TERMFONT_BOLD, /* EQNFONT_FAT */
36: TERMFONT_UNDER /* EQNFONT_ITALIC */
37: };
38:
1.3 kristaps 39: static void eqn_box(struct termp *, const struct eqn_box *);
1.1 kristaps 40:
1.5 schwarze 41:
1.1 kristaps 42: void
43: term_eqn(struct termp *p, const struct eqn *ep)
44: {
45:
46: eqn_box(p, ep->root);
1.7 schwarze 47: p->flags &= ~TERMP_NOSPACE;
1.1 kristaps 48: }
49:
50: static void
51: eqn_box(struct termp *p, const struct eqn_box *bp)
52: {
1.7 schwarze 53: const struct eqn_box *child;
1.12 ! schwarze 54: int delim;
! 55:
! 56: /* Delimiters around this box? */
1.1 kristaps 57:
1.10 schwarze 58: if ((bp->type == EQN_LIST && bp->expectargs > 1) ||
1.7 schwarze 59: (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
1.12 ! 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)))))) {
1.7 schwarze 70: if (bp->parent->type == EQN_SUBEXPR && bp->prev != NULL)
71: p->flags |= TERMP_NOSPACE;
72: term_word(p, bp->left != NULL ? bp->left : "(");
73: p->flags |= TERMP_NOSPACE;
1.12 ! schwarze 74: delim = 1;
! 75: } else
! 76: delim = 0;
! 77:
! 78: /* Handle Fonts and text. */
! 79:
1.7 schwarze 80: if (bp->font != EQNFONT_NONE)
1.4 kristaps 81: term_fontpush(p, fontmap[(int)bp->font]);
82:
1.7 schwarze 83: if (bp->text != NULL)
1.4 kristaps 84: term_word(p, bp->text);
1.1 kristaps 85:
1.12 ! schwarze 86: /* Special box types. */
! 87:
1.7 schwarze 88: if (bp->pos == EQNPOS_SQRT) {
89: term_word(p, "sqrt");
1.9 schwarze 90: if (bp->first != NULL) {
91: p->flags |= TERMP_NOSPACE;
92: eqn_box(p, bp->first);
93: }
1.7 schwarze 94: } else if (bp->type == EQN_SUBEXPR) {
95: child = bp->first;
96: eqn_box(p, child);
97: p->flags |= TERMP_NOSPACE;
98: term_word(p, bp->pos == EQNPOS_OVER ? "/" :
99: (bp->pos == EQNPOS_SUP ||
100: bp->pos == EQNPOS_TO) ? "^" : "_");
101: p->flags |= TERMP_NOSPACE;
102: child = child->next;
1.8 schwarze 103: if (child != NULL) {
1.7 schwarze 104: eqn_box(p, child);
1.8 schwarze 105: if (bp->pos == EQNPOS_FROMTO ||
106: bp->pos == EQNPOS_SUBSUP) {
107: p->flags |= TERMP_NOSPACE;
108: term_word(p, "^");
109: p->flags |= TERMP_NOSPACE;
110: child = child->next;
111: if (child != NULL)
112: eqn_box(p, child);
113: }
1.7 schwarze 114: }
115: } else {
116: child = bp->first;
1.9 schwarze 117: if (bp->type == EQN_MATRIX &&
1.10 schwarze 118: child != NULL &&
119: child->type == EQN_LIST &&
120: child->expectargs > 1)
1.7 schwarze 121: child = child->first;
122: while (child != NULL) {
123: eqn_box(p,
124: bp->type == EQN_PILE &&
125: child->type == EQN_LIST &&
1.10 schwarze 126: child->expectargs > 1 &&
1.7 schwarze 127: child->args == 1 ?
128: child->first : child);
129: child = child->next;
130: }
131: }
1.1 kristaps 132:
1.12 ! schwarze 133: /* Handle Fonts and diacritics. */
! 134:
1.7 schwarze 135: if (bp->font != EQNFONT_NONE)
1.4 kristaps 136: term_fontpop(p);
1.11 schwarze 137: if (bp->top != NULL) {
138: p->flags |= TERMP_NOSPACE;
139: term_word(p, bp->top);
140: }
141: if (bp->bottom != NULL) {
142: p->flags |= TERMP_NOSPACE;
143: term_word(p, "_");
144: }
1.12 ! schwarze 145:
! 146: /* Right delimiter after this box? */
! 147:
! 148: if (delim) {
1.7 schwarze 149: p->flags |= TERMP_NOSPACE;
150: term_word(p, bp->right != NULL ? bp->right : ")");
151: if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
152: p->flags |= TERMP_NOSPACE;
153: }
1.1 kristaps 154: }
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