Delete substantial amounts of code

[mandoc.git] / eqn_html.c

diff --git a/eqn_html.c b/eqn_html.c
index 80c82f1de5b56b05122968d8b1ad7744688a891b..51f144234275d88c09c5d9c768edbb5df00b3968 100644 (file)
--- a/eqn_html.c
+++ b/eqn_html.c
@@ -1,6 +1,7 @@
-/*     $Id: eqn_html.c,v 1.2 2011/07/24 10:09:03 kristaps Exp $ */
+/*     $Id: eqn_html.c,v 1.17 2017/07/14 13:32:35 schwarze Exp $ */

 /*
 /*

- * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 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
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above


@@ -14,11 +15,12 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

-#ifdef HAVE_CONFIG_H

 #include "config.h"
 #include "config.h"

-#endif
+
+#include <sys/types.h>

 
 #include <assert.h>
 
 #include <assert.h>

+#include <ctype.h>

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>


@@ -27,55 +29,216 @@
 #include "out.h"
 #include "html.h"
 
 #include "out.h"
 #include "html.h"
 

-static const enum htmltag fontmap[EQNFONT__MAX] = {
-       TAG_SPAN, /* EQNFONT_NONE */
-       TAG_SPAN, /* EQNFONT_ROMAN */
-       TAG_B, /* EQNFONT_BOLD */
-       TAG_B, /* EQNFONT_FAT */
-       TAG_I /* EQNFONT_ITALIC */
-};
+static void
+eqn_box(struct html *p, const struct eqn_box *bp)
+{
+       struct tag      *post, *row, *cell, *t;
+       const struct eqn_box *child, *parent;
+       const char      *cp;
+       size_t           i, j, rows;
+       enum htmltag     tag;
+       enum eqn_fontt   font;

 
 

+       if (NULL == bp)
+               return;

 
 

-static void    eqn_box(struct html *, const struct eqn_box *);
+       post = NULL;

 
 

-void
-print_eqn(struct html *p, const struct eqn *ep)
-{
-       struct htmlpair  tag;
-       struct tag      *t;
+       /*
+        * 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 (bp->first->type != EQN_LIST ||
+                   bp->first->expectargs == 1) {
+                       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, "");
+               for (i = 0; i < rows; i++) {
+                       parent = bp->first->first;
+                       row = print_otag(p, TAG_MTR, "");
+                       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, "");
+                               /*
+                                * 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;
+       }

 
 

-       PAIR_CLASS_INIT(&tag, "eqn");
-       t = print_otag(p, TAG_SPAN, 1, &tag);
+       switch (bp->pos) {
+       case EQNPOS_TO:
+               post = print_otag(p, TAG_MOVER, "");
+               break;
+       case EQNPOS_SUP:
+               post = print_otag(p, TAG_MSUP, "");
+               break;
+       case EQNPOS_FROM:
+               post = print_otag(p, TAG_MUNDER, "");
+               break;
+       case EQNPOS_SUB:
+               post = print_otag(p, TAG_MSUB, "");
+               break;
+       case EQNPOS_OVER:
+               post = print_otag(p, TAG_MFRAC, "");
+               break;
+       case EQNPOS_FROMTO:
+               post = print_otag(p, TAG_MUNDEROVER, "");
+               break;
+       case EQNPOS_SUBSUP:
+               post = print_otag(p, TAG_MSUBSUP, "");
+               break;
+       case EQNPOS_SQRT:
+               post = print_otag(p, TAG_MSQRT, "");
+               break;
+       default:
+               break;
+       }

 
 

-       p->flags |= HTML_NONOSPACE;
-       eqn_box(p, ep->root);
-       p->flags &= ~HTML_NONOSPACE;
+       if (bp->top || bp->bottom) {
+               assert(NULL == post);
+               if (bp->top && NULL == bp->bottom)
+                       post = print_otag(p, TAG_MOVER, "");
+               else if (bp->top && bp->bottom)
+                       post = print_otag(p, TAG_MUNDEROVER, "");
+               else if (bp->bottom)
+                       post = print_otag(p, TAG_MUNDER, "");
+       }

 
 

-       print_tagq(p, t);
+       if (EQN_PILE == bp->type) {
+               assert(NULL == post);
+               if (bp->first != NULL &&
+                   bp->first->type == EQN_LIST &&
+                   bp->first->expectargs > 1)
+                       post = print_otag(p, TAG_MTABLE, "");
+       } else if (bp->type == EQN_LIST && bp->expectargs > 1 &&
+           bp->parent && bp->parent->type == EQN_PILE) {
+               assert(NULL == post);
+               post = print_otag(p, TAG_MTR, "");
+               print_otag(p, TAG_MTD, "");
+       }
+
+       if (bp->text != NULL) {
+               assert(post == NULL);
+               tag = TAG_MI;
+               cp = bp->text;
+               if (isdigit((unsigned char)cp[0]) ||
+                   (cp[0] == '.' && isdigit((unsigned char)cp[1]))) {
+                       tag = TAG_MN;
+                       while (*++cp != '\0') {
+                               if (*cp != '.' &&
+                                   isdigit((unsigned char)*cp) == 0) {
+                                       tag = TAG_MI;
+                                       break;
+                               }
+                       }
+               } else if (*cp != '\0' && isalpha((unsigned char)*cp) == 0) {
+                       tag = TAG_MO;
+                       while (*cp != '\0') {
+                               if (cp[0] == '\\' && cp[1] != '\0') {
+                                       cp++;
+                                       mandoc_escape(&cp, NULL, NULL);
+                               } else if (isalnum((unsigned char)*cp)) {
+                                       tag = TAG_MI;
+                                       break;
+                               } else
+                                       cp++;
+                       }
+               }
+               font = bp->font;
+               if (bp->text[0] != '\0' &&
+                   (((tag == TAG_MN || tag == TAG_MO) &&
+                     font == EQNFONT_ROMAN) ||
+                    (tag == TAG_MI && font == (bp->text[1] == '\0' ?
+                     EQNFONT_ITALIC : EQNFONT_ROMAN))))
+                       font = EQNFONT_NONE;
+               switch (font) {
+               case EQNFONT_NONE:
+                       post = print_otag(p, tag, "");
+                       break;
+               case EQNFONT_ROMAN:
+                       post = print_otag(p, tag, "?", "fontstyle", "normal");
+                       break;
+               case EQNFONT_BOLD:
+               case EQNFONT_FAT:
+                       post = print_otag(p, tag, "?", "fontweight", "bold");
+                       break;
+               case EQNFONT_ITALIC:
+                       post = print_otag(p, tag, "?", "fontstyle", "italic");
+                       break;
+               default:
+                       abort();
+               }
+               print_text(p, bp->text);
+       } else if (NULL == post) {
+               if (NULL != bp->left || NULL != bp->right)
+                       post = print_otag(p, TAG_MFENCED, "??",
+                           "open", bp->left == NULL ? "" : bp->left,
+                           "close", bp->right == NULL ? "" : bp->right);
+               if (NULL == post)
+                       post = print_otag(p, TAG_MROW, "");
+               else
+                       print_otag(p, TAG_MROW, "");
+       }
+
+       eqn_box(p, bp->first);
+
+out:
+       if (NULL != bp->bottom) {
+               t = print_otag(p, TAG_MO, "");
+               print_text(p, bp->bottom);
+               print_tagq(p, t);
+       }
+       if (NULL != bp->top) {
+               t = print_otag(p, TAG_MO, "");
+               print_text(p, bp->top);
+               print_tagq(p, t);
+       }
+
+       if (NULL != post)
+               print_tagq(p, post);
+
+       eqn_box(p, bp->next);

 }
 
 }
 

-static void
-eqn_box(struct html *p, const struct eqn_box *bp)
+void
+print_eqn(struct html *p, const struct eqn_box *bp)

 {
        struct tag      *t;
 
 {
        struct tag      *t;
 

-       t = EQNFONT_NONE == bp->font ? NULL : 
-               print_otag(p, fontmap[(int)bp->font], 0, NULL);
+       if (bp->first == NULL)
+               return;

 
 

-       if (bp->left)
-               print_text(p, bp->left);
-       
-       if (bp->text)
-               print_text(p, bp->text);
-
-       if (bp->first)
-               eqn_box(p, bp->first);
+       t = print_otag(p, TAG_MATH, "c", "eqn");

 
 

-       if (NULL != t)
-               print_tagq(p, t);
-       if (bp->right)
-               print_text(p, bp->right);
+       p->flags |= HTML_NONOSPACE;
+       eqn_box(p, bp);
+       p->flags &= ~HTML_NONOSPACE;

 
 

-       if (bp->next)
-               eqn_box(p, bp->next);
+       print_tagq(p, t);

 }
 }