refactor inline/block element determination

lib/marked.js

@@ -35,19 +35,11 @@ block.list = (function() {
 block.html = (function() {
   var html = block.html.source;
 
-  // The real markdown checks for block elements.
-  // It's better to check for non-inline elements.
-  // Unknown elements will then be treated as block elements.
-  var closed = '<(?!(?:'
-    + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code'
-    + '|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo'
-    + '|span|br|wbr|ins|del|img)\\b)'
-    + '(\\w+)[^\\0]+?</\\1>';
-
   html = html
     .replace('comment', /<!--[^\0]*?-->/.source)
-    .replace('closed', closed)
-    .replace('closing', /<\w+(?!:\/|@)\b(?:"[^"]*"|'[^']*'|[^>])*>/.source);
+    .replace('closed', /<(?!elements)(\w+)[^\0]+?<\/\1>/.source)
+    .replace('closing', /<\w+(?!:\/|@)\b(?:"[^"]*"|'[^']*'|[^>])*>/.source)
+    .replace('elements', elements());
 
   return new RegExp(html);
 })();
@@ -57,7 +49,7 @@ block.paragraph = (function() {
     , body = [];
 
   (function push(rule) {
-    rule = rule.source || block[rule].source;
+    rule = block[rule] ? block[rule].source : rule;
     body.push(rule.replace(/(^|[^\[])\^/g, '$1'));
     return push;
   })
@@ -66,12 +58,7 @@ block.paragraph = (function() {
   ('heading')
   ('lheading')
   ('blockquote')
-  (new RegExp('<'
-    + '(?:article|aside|audio|blockquote|canvas|caption|col|colgroup|dialog|div'
-    + '|d[ltd]|embed|fieldset|figure|figcaption|footer|form|h[1-6r]|header'
-    + '|hgroup|input|label|legend|li|nav|noscript|object|[ou]l|optgroup|option'
-    + '|p|param|pre|script|section|select|source|table|t(?:body|foot|head)'
-    + '|t[dhr]|textarea|video)\\b'));
+  ('<(?!' + elements() + ')\\w+');
 
   return new
     RegExp(paragraph.replace('body', body.join('|')));
@@ -673,6 +660,15 @@ var mangle = function(str) {
   return out;
 };
 
+function elements() {
+  var elements = '(?:'
+    + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code'
+    + '|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo'
+    + '|span|br|wbr|ins|del|img)\\b';
+
+  return elements;
+}
+
 /**
  * Expose
  */