external/bsd/mdocml/dist/eqn_term.c

   1 /*      Id: eqn_term.c,v 1.4 2011/07/24 10:09:03 kristaps Exp  */
   2 /*
   3  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <assert.h>
  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
  40 void
  41 term_eqn(struct termp *p, const struct eqn *ep)
  42 {
  43
  44         p->flags |= TERMP_NONOSPACE;
  45         eqn_box(p, ep->root);
  46         term_word(p, " ");
  47         p->flags &= ~TERMP_NONOSPACE;
  48 }
  49
  50 static void
  51 eqn_box(struct termp *p, const struct eqn_box *bp)
  52 {
  53
  54         if (EQNFONT_NONE != bp->font)
  55                 term_fontpush(p, fontmap[(int)bp->font]);
  56         if (bp->left)
  57                 term_word(p, bp->left);
  58         if (EQN_SUBEXPR == bp->type)
  59                 term_word(p, "(");
  60
  61         if (bp->text)
  62                 term_word(p, bp->text);
  63
  64         if (bp->first)
  65                 eqn_box(p, bp->first);
  66
  67         if (EQN_SUBEXPR == bp->type)
  68                 term_word(p, ")");
  69         if (bp->right)
  70                 term_word(p, bp->right);
  71         if (EQNFONT_NONE != bp->font)
  72                 term_fontpop(p);
  73
  74         if (bp->next)
  75                 eqn_box(p, bp->next);
  76 }