1 /* $Id: eqn_html.c,v 1.19 2019/03/17 18:21:45 schwarze Exp $ */
3 * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2017 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 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.
20 #include <sys/types.h>
35 eqn_box(struct html *p, const struct eqn_box *bp)
37 struct tag *post, *row, *cell, *t;
38 const struct eqn_box *child, *parent;
50 * Special handling for a matrix, which is presented to us in
51 * column order, but must be printed in row-order.
53 if (EQN_MATRIX == bp->type) {
54 if (NULL == bp->first)
56 if (bp->first->type != EQN_LIST ||
57 bp->first->expectargs == 1) {
58 eqn_box(p, bp->first);
61 if (NULL == (parent = bp->first->first))
63 /* Estimate the number of rows, first. */
64 if (NULL == (child = parent->first))
66 for (rows = 0; NULL != child; rows++)
68 /* Print row-by-row. */
69 post = print_otag(p, TAG_MTABLE, "");
70 for (i = 0; i < rows; i++) {
71 parent = bp->first->first;
72 row = print_otag(p, TAG_MTR, "");
73 while (NULL != parent) {
74 child = parent->first;
75 for (j = 0; j < i; j++) {
80 cell = print_otag(p, TAG_MTD, "");
82 * If we have no data for this
83 * particular cell, then print a
84 * placeholder and continue--don't puke.
87 eqn_box(p, child->first);
89 parent = parent->next;
98 post = print_otag(p, TAG_MOVER, "");
101 post = print_otag(p, TAG_MSUP, "");
104 post = print_otag(p, TAG_MUNDER, "");
107 post = print_otag(p, TAG_MSUB, "");
110 post = print_otag(p, TAG_MFRAC, "");
113 post = print_otag(p, TAG_MUNDEROVER, "");
116 post = print_otag(p, TAG_MSUBSUP, "");
119 post = print_otag(p, TAG_MSQRT, "");
125 if (bp->top || bp->bottom) {
126 assert(NULL == post);
127 if (bp->top && NULL == bp->bottom)
128 post = print_otag(p, TAG_MOVER, "");
129 else if (bp->top && bp->bottom)
130 post = print_otag(p, TAG_MUNDEROVER, "");
132 post = print_otag(p, TAG_MUNDER, "");
135 if (EQN_PILE == bp->type) {
136 assert(NULL == post);
137 if (bp->first != NULL &&
138 bp->first->type == EQN_LIST &&
139 bp->first->expectargs > 1)
140 post = print_otag(p, TAG_MTABLE, "");
141 } else if (bp->type == EQN_LIST && bp->expectargs > 1 &&
142 bp->parent && bp->parent->type == EQN_PILE) {
143 assert(NULL == post);
144 post = print_otag(p, TAG_MTR, "");
145 print_otag(p, TAG_MTD, "");
148 if (bp->text != NULL) {
149 assert(post == NULL);
152 if (isdigit((unsigned char)cp[0]) ||
153 (cp[0] == '.' && isdigit((unsigned char)cp[1]))) {
155 while (*++cp != '\0') {
157 isdigit((unsigned char)*cp) == 0) {
162 } else if (*cp != '\0' && isalpha((unsigned char)*cp) == 0) {
164 while (*cp != '\0') {
165 if (cp[0] == '\\' && cp[1] != '\0') {
167 mandoc_escape(&cp, NULL, NULL);
168 } else if (isalnum((unsigned char)*cp)) {
176 if (bp->text[0] != '\0' &&
177 (((tag == TAG_MN || tag == TAG_MO) &&
178 font == EQNFONT_ROMAN) ||
179 (tag == TAG_MI && font == (bp->text[1] == '\0' ?
180 EQNFONT_ITALIC : EQNFONT_ROMAN))))
184 post = print_otag(p, tag, "");
187 post = print_otag(p, tag, "?", "fontstyle", "normal");
191 post = print_otag(p, tag, "?", "fontweight", "bold");
194 post = print_otag(p, tag, "?", "fontstyle", "italic");
199 print_text(p, bp->text);
200 } else if (NULL == post) {
201 if (NULL != bp->left || NULL != bp->right)
202 post = print_otag(p, TAG_MFENCED, "??",
203 "open", bp->left == NULL ? "" : bp->left,
204 "close", bp->right == NULL ? "" : bp->right);
206 post = print_otag(p, TAG_MROW, "");
208 print_otag(p, TAG_MROW, "");
211 eqn_box(p, bp->first);
214 if (NULL != bp->bottom) {
215 t = print_otag(p, TAG_MO, "");
216 print_text(p, bp->bottom);
219 if (NULL != bp->top) {
220 t = print_otag(p, TAG_MO, "");
221 print_text(p, bp->top);
228 eqn_box(p, bp->next);
232 print_eqn(struct html *p, const struct eqn_box *bp)
236 if (bp->first == NULL)
239 t = print_otag(p, TAG_MATH, "c", "eqn");
241 p->flags |= HTML_NONOSPACE;
243 p->flags &= ~HTML_NONOSPACE;