Tedu support for the -xsh4.2 argument to the mdoc(7) .St macro

[mandoc.git] / eqn_html.c

diff --git a/eqn_html.c b/eqn_html.c
index 4c96c9a0b56788f689b776a35e1533d2405ec43f..64d06649997feeb3a482a64b00c09387c8cea1f3 100644 (file)
--- a/eqn_html.c
+++ b/eqn_html.c
@@ -1,4 +1,4 @@
-/*     $Id: eqn_html.c,v 1.12 2017/06/20 17:24:35 schwarze Exp $ */
+/*     $Id: eqn_html.c,v 1.19 2019/03/17 18:21:45 schwarze Exp $ */
 /*
  * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -20,11 +20,14 @@
 #include <sys/types.h>
 
 #include <assert.h>
+#include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "mandoc.h"
+#include "roff.h"
+#include "eqn.h"
 #include "out.h"
 #include "html.h"
 
@@ -33,7 +36,10 @@ 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;
@@ -47,7 +53,8 @@ eqn_box(struct html *p, const struct eqn_box *bp)
        if (EQN_MATRIX == bp->type) {
                if (NULL == bp->first)
                        goto out;
-               if (EQN_LIST != bp->first->type) {
+               if (bp->first->type != EQN_LIST ||
+                   bp->first->expectargs == 1) {
                        eqn_box(p, bp->first);
                        goto out;
                }
@@ -127,18 +134,68 @@ eqn_box(struct html *p, const struct eqn_box *bp)
 
        if (EQN_PILE == bp->type) {
                assert(NULL == post);
-               if (bp->first != NULL && bp->first->type == EQN_LIST)
+               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 &&
+       } 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 (NULL != bp->text) {
-               assert(NULL == post);
-               post = print_otag(p, TAG_MI, "");
+       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)
@@ -172,14 +229,17 @@ out:
 }
 
 void
-print_eqn(struct html *p, const struct eqn *ep)
+print_eqn(struct html *p, const struct eqn_box *bp)
 {
        struct tag      *t;
 
+       if (bp->first == NULL)
+               return;
+
        t = print_otag(p, TAG_MATH, "c", "eqn");
 
        p->flags |= HTML_NONOSPACE;
-       eqn_box(p, ep->root);
+       eqn_box(p, bp);
        p->flags &= ~HTML_NONOSPACE;
 
        print_tagq(p, t);