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/* $OpenBSD: eqn_html.c,v 1.6 2014/10/12 19:10:56 schwarze Exp $ */
/*
* Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mandoc.h"
#include "out.h"
#include "html.h"
static void
eqn_box(struct html *p, const struct eqn_box *bp)
{
struct tag *post, *row, *cell, *t;
struct htmlpair tag[2];
const struct eqn_box *child, *parent;
size_t i, j, rows;
if (NULL == bp)
return;
post = NULL;
/*
* Special handling for a matrix, which is presented to us in
* column order, but must be printed in row-order.
*/
if (EQN_MATRIX == bp->type) {
if (NULL == bp->first)
goto out;
if (EQN_LIST != bp->first->type) {
eqn_box(p, bp->first);
goto out;
}
if (NULL == (parent = bp->first->first))
goto out;
/* Estimate the number of rows, first. */
if (NULL == (child = parent->first))
goto out;
for (rows = 0; NULL != child; rows++)
child = child->next;
/* Print row-by-row. */
post = print_otag(p, TAG_MTABLE, 0, NULL);
for (i = 0; i < rows; i++) {
parent = bp->first->first;
row = print_otag(p, TAG_MTR, 0, NULL);
while (NULL != parent) {
child = parent->first;
for (j = 0; j < i; j++) {
if (NULL == child)
break;
child = child->next;
}
cell = print_otag
(p, TAG_MTD, 0, NULL);
/*
* If we have no data for this
* particular cell, then print a
* placeholder and continue--don't puke.
*/
if (NULL != child)
eqn_box(p, child->first);
print_tagq(p, cell);
parent = parent->next;
}
print_tagq(p, row);
}
goto out;
}
switch (bp->pos) {
case (EQNPOS_TO):
post = print_otag(p, TAG_MOVER, 0, NULL);
break;
case (EQNPOS_SUP):
post = print_otag(p, TAG_MSUP, 0, NULL);
break;
case (EQNPOS_FROM):
post = print_otag(p, TAG_MUNDER, 0, NULL);
break;
case (EQNPOS_SUB):
post = print_otag(p, TAG_MSUB, 0, NULL);
break;
case (EQNPOS_OVER):
post = print_otag(p, TAG_MFRAC, 0, NULL);
break;
case (EQNPOS_FROMTO):
post = print_otag(p, TAG_MUNDEROVER, 0, NULL);
break;
case (EQNPOS_SUBSUP):
post = print_otag(p, TAG_MSUBSUP, 0, NULL);
break;
case (EQNPOS_SQRT):
post = print_otag(p, TAG_MSQRT, 0, NULL);
break;
default:
break;
}
if (bp->top || bp->bottom) {
assert(NULL == post);
if (bp->top && NULL == bp->bottom)
post = print_otag(p, TAG_MOVER, 0, NULL);
else if (bp->top && bp->bottom)
post = print_otag(p, TAG_MUNDEROVER, 0, NULL);
else if (bp->bottom)
post = print_otag(p, TAG_MUNDER, 0, NULL);
}
if (EQN_PILE == bp->type) {
assert(NULL == post);
if (bp->first != NULL && bp->first->type == EQN_LIST)
post = print_otag(p, TAG_MTABLE, 0, NULL);
} else if (bp->type == EQN_LIST &&
bp->parent && bp->parent->type == EQN_PILE) {
assert(NULL == post);
post = print_otag(p, TAG_MTR, 0, NULL);
print_otag(p, TAG_MTD, 0, NULL);
}
if (NULL != bp->text) {
assert(NULL == post);
post = print_otag(p, TAG_MI, 0, NULL);
print_text(p, bp->text);
} else if (NULL == post) {
if (NULL != bp->left || NULL != bp->right) {
PAIR_INIT(&tag[0], ATTR_OPEN,
NULL == bp->left ? "" : bp->left);
PAIR_INIT(&tag[1], ATTR_CLOSE,
NULL == bp->right ? "" : bp->right);
post = print_otag(p, TAG_MFENCED, 2, tag);
}
if (NULL == post)
post = print_otag(p, TAG_MROW, 0, NULL);
else
print_otag(p, TAG_MROW, 0, NULL);
}
eqn_box(p, bp->first);
out:
if (NULL != bp->bottom) {
t = print_otag(p, TAG_MO, 0, NULL);
print_text(p, bp->bottom);
print_tagq(p, t);
}
if (NULL != bp->top) {
t = print_otag(p, TAG_MO, 0, NULL);
print_text(p, bp->top);
print_tagq(p, t);
}
if (NULL != post)
print_tagq(p, post);
eqn_box(p, bp->next);
}
void
print_eqn(struct html *p, const struct eqn *ep)
{
struct htmlpair tag;
struct tag *t;
PAIR_CLASS_INIT(&tag, "eqn");
t = print_otag(p, TAG_MATH, 1, &tag);
p->flags |= HTML_NONOSPACE;
eqn_box(p, ep->root);
p->flags &= ~HTML_NONOSPACE;
print_tagq(p, t);
}
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