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/* $Id$ */
/*
* Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
*
* 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 "config.h"
#include <sys/types.h>
#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mandoc.h"
#include "out.h"
#include "term.h"
static const enum termfont fontmap[EQNFONT__MAX] = {
TERMFONT_NONE, /* EQNFONT_NONE */
TERMFONT_NONE, /* EQNFONT_ROMAN */
TERMFONT_BOLD, /* EQNFONT_BOLD */
TERMFONT_BOLD, /* EQNFONT_FAT */
TERMFONT_UNDER /* EQNFONT_ITALIC */
};
static void eqn_box(struct termp *, const struct eqn_box *);
void
term_eqn(struct termp *p, const struct eqn_box *bp)
{
eqn_box(p, bp);
p->flags &= ~TERMP_NOSPACE;
}
static void
eqn_box(struct termp *p, const struct eqn_box *bp)
{
const struct eqn_box *child;
const char *cp;
int delim;
/* Delimiters around this box? */
if ((bp->type == EQN_LIST && bp->expectargs > 1) ||
(bp->type == EQN_PILE && (bp->prev || bp->next)) ||
(bp->parent != NULL && (bp->parent->pos == EQNPOS_SQRT ||
/* Diacritic followed by ^ or _. */
((bp->top != NULL || bp->bottom != NULL) &&
bp->parent->type == EQN_SUBEXPR &&
bp->parent->pos != EQNPOS_OVER && bp->next != NULL) ||
/* Nested over, sub, sup, from, to. */
(bp->type == EQN_SUBEXPR && bp->pos != EQNPOS_SQRT &&
((bp->parent->type == EQN_LIST && bp->expectargs == 1) ||
(bp->parent->type == EQN_SUBEXPR &&
bp->pos != EQNPOS_SQRT)))))) {
if ((bp->parent->type == EQN_SUBEXPR && bp->prev != NULL) ||
(bp->type == EQN_LIST &&
bp->first != NULL &&
bp->first->type != EQN_PILE &&
bp->first->type != EQN_MATRIX &&
bp->prev != NULL &&
(bp->prev->type == EQN_LIST ||
(bp->prev->type == EQN_TEXT &&
(*bp->prev->text == '\\' ||
isalpha((unsigned char)*bp->prev->text))))))
p->flags |= TERMP_NOSPACE;
term_word(p, bp->left != NULL ? bp->left : "(");
p->flags |= TERMP_NOSPACE;
delim = 1;
} else
delim = 0;
/* Handle Fonts and text. */
if (bp->font != EQNFONT_NONE)
term_fontpush(p, fontmap[(int)bp->font]);
if (bp->text != NULL) {
if (strchr("!\"'),.:;?]}", *bp->text) != NULL)
p->flags |= TERMP_NOSPACE;
term_word(p, bp->text);
if ((cp = strchr(bp->text, '\0')) > bp->text &&
(strchr("\"'([{", cp[-1]) != NULL ||
(bp->prev == NULL && (cp[-1] == '-' ||
(cp >= bp->text + 5 &&
strcmp(cp - 5, "\\[mi]") == 0)))))
p->flags |= TERMP_NOSPACE;
}
/* Special box types. */
if (bp->pos == EQNPOS_SQRT) {
term_word(p, "sqrt");
if (bp->first != NULL) {
p->flags |= TERMP_NOSPACE;
eqn_box(p, bp->first);
}
} else if (bp->type == EQN_SUBEXPR) {
child = bp->first;
eqn_box(p, child);
p->flags |= TERMP_NOSPACE;
term_word(p, bp->pos == EQNPOS_OVER ? "/" :
(bp->pos == EQNPOS_SUP ||
bp->pos == EQNPOS_TO) ? "^" : "_");
child = child->next;
if (child != NULL) {
p->flags |= TERMP_NOSPACE;
eqn_box(p, child);
if (bp->pos == EQNPOS_FROMTO ||
bp->pos == EQNPOS_SUBSUP) {
p->flags |= TERMP_NOSPACE;
term_word(p, "^");
p->flags |= TERMP_NOSPACE;
child = child->next;
if (child != NULL)
eqn_box(p, child);
}
}
} else {
child = bp->first;
if (bp->type == EQN_MATRIX &&
child != NULL &&
child->type == EQN_LIST &&
child->expectargs > 1)
child = child->first;
while (child != NULL) {
eqn_box(p,
bp->type == EQN_PILE &&
child->type == EQN_LIST &&
child->expectargs > 1 &&
child->args == 1 ?
child->first : child);
child = child->next;
}
}
/* Handle Fonts and diacritics. */
if (bp->font != EQNFONT_NONE)
term_fontpop(p);
if (bp->top != NULL) {
p->flags |= TERMP_NOSPACE;
term_word(p, bp->top);
}
if (bp->bottom != NULL) {
p->flags |= TERMP_NOSPACE;
term_word(p, "_");
}
/* Right delimiter after this box? */
if (delim) {
p->flags |= TERMP_NOSPACE;
term_word(p, bp->right != NULL ? bp->right : ")");
if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
p->flags |= TERMP_NOSPACE;
}
}
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