usr/src/cmd/mandoc/eqn_term.c

   1 /*      $Id: eqn_term.c,v 1.8 2015/01/01 15:36:08 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
   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"
  19
  20 #include <sys/types.h>
  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
  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
  39 static void     eqn_box(struct termp *, const struct eqn_box *);
  40
  41
  42 void
  43 term_eqn(struct termp *p, const struct eqn *ep)
  44 {
  45
  46         eqn_box(p, ep->root);
  47         p->flags &= ~TERMP_NOSPACE;
  48 }
  49
  50 static void
  51 eqn_box(struct termp *p, const struct eqn_box *bp)
  52 {
  53         const struct eqn_box *child;
  54
  55         if (bp->type == EQN_LIST ||
  56             (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
  57             (bp->parent != NULL && bp->parent->pos == EQNPOS_SQRT)) {
  58                 if (bp->parent->type == EQN_SUBEXPR && bp->prev != NULL)
  59                         p->flags |= TERMP_NOSPACE;
  60                 term_word(p, bp->left != NULL ? bp->left : "(");
  61                 p->flags |= TERMP_NOSPACE;
  62         }
  63         if (bp->font != EQNFONT_NONE)
  64                 term_fontpush(p, fontmap[(int)bp->font]);
  65
  66         if (bp->text != NULL)
  67                 term_word(p, bp->text);
  68
  69         if (bp->pos == EQNPOS_SQRT) {
  70                 term_word(p, "sqrt");
  71                 p->flags |= TERMP_NOSPACE;
  72                 eqn_box(p, bp->first);
  73         } else if (bp->type == EQN_SUBEXPR) {
  74                 child = bp->first;
  75                 eqn_box(p, child);
  76                 p->flags |= TERMP_NOSPACE;
  77                 term_word(p, bp->pos == EQNPOS_OVER ? "/" :
  78                     (bp->pos == EQNPOS_SUP ||
  79                      bp->pos == EQNPOS_TO) ? "^" : "_");
  80                 p->flags |= TERMP_NOSPACE;
  81                 child = child->next;
  82                 if (child != NULL) {
  83                         eqn_box(p, child);
  84                         if (bp->pos == EQNPOS_FROMTO ||
  85                             bp->pos == EQNPOS_SUBSUP) {
  86                                 p->flags |= TERMP_NOSPACE;
  87                                 term_word(p, "^");
  88                                 p->flags |= TERMP_NOSPACE;
  89                                 child = child->next;
  90                                 if (child != NULL)
  91                                         eqn_box(p, child);
  92                         }
  93                 }
  94         } else {
  95                 child = bp->first;
  96                 if (bp->type == EQN_MATRIX && child->type == EQN_LIST)
  97                         child = child->first;
  98                 while (child != NULL) {
  99                         eqn_box(p,
 100                             bp->type == EQN_PILE &&
 101                             child->type == EQN_LIST &&
 102                             child->args == 1 ?
 103                             child->first : child);
 104                         child = child->next;
 105                 }
 106         }
 107
 108         if (bp->font != EQNFONT_NONE)
 109                 term_fontpop(p);
 110         if (bp->type == EQN_LIST ||
 111             (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
 112             (bp->parent != NULL && bp->parent->pos == EQNPOS_SQRT)) {
 113                 p->flags |= TERMP_NOSPACE;
 114                 term_word(p, bp->right != NULL ? bp->right : ")");
 115                 if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
 116                         p->flags |= TERMP_NOSPACE;
 117         }
 118
 119         if (bp->top != NULL) {
 120                 p->flags |= TERMP_NOSPACE;
 121                 term_word(p, bp->top);
 122         }
 123         if (bp->bottom != NULL) {
 124                 p->flags |= TERMP_NOSPACE;
 125                 term_word(p, "_");
 126         }
 127 }