Ensure the same number of tags for CSS and HTML

The Tags array can be modified without changing the "ntags" number in
the CSS side. To prevent errors, an static assert ensures the same
number is used in both sides, which is known at compilation time.

Fixes: https://github.com/dillo-browser/dillo/issues/184

1 files changed, 14 insertions, 6 deletions

diff --git a/src/css.hh b/src/css.hh
index 011c17f8..44328c42 100644
--- a/src/css.hh
+++ b/src/css.hh
@@ -1,8 +1,21 @@
+/*
+ * File: css.hh
+ *
+ * Copyright (C) 2008-2014 Johannes Hofmann <Johannes.Hofmann@gmx.de>
+ * Copyright (C) 2024 Rodrigo Arias Mallo <rodarima@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ */
+
 #ifndef __CSS_HH__
 #define __CSS_HH__
 
 #include "dw/core.hh"
 #include "doctree.hh"
+#include "html.hh"
 
 /* Origin and weight. Used only internally.*/
 typedef enum {
@@ -482,12 +495,7 @@ class CssStyleSheet {
                <lout::object::ConstString, RuleList > (true, true, 256) {};
       };
 
-      static const int ntags = 90 + 14; // \todo don't hardcode
-      /* 90 is the full number of html4 elements, including those which we have
-       * implemented. From html5, let's add: article, header, footer, mark,
-       * nav, section, aside, figure, figcaption, wbr, audio, video, source,
-       * embed.
-       */
+      static const int ntags = HTML_NTAGS;
 
       RuleList elementTable[ntags], anyTable;
       RuleMap idTable, classTable;