showdown/src/subParsers/hashHTMLSpans.js

/**
 * Hash span elements that should not be parsed as markdown
 */
showdown.subParser('hashHTMLSpans', function (text, config, globals) {
  'use strict';

  var matches = showdown.helper.matchRecursiveRegExp(text, '<code\\b[^>]*>', '</code>', 'gi');

  for (var i = 0; i < matches.length; ++i) {
    text = text.replace(matches[i][0], '~L' + (globals.gHtmlSpans.push(matches[i][0]) - 1) + 'L');
  }
  return text;
});

/**
 * Unhash HTML spans
 */
showdown.subParser('unhashHTMLSpans', function (text, config, globals) {
  'use strict';

  for (var i = 0; i < globals.gHtmlSpans.length; ++i) {
    text = text.replace('~L' + i + 'L', globals.gHtmlSpans[i]);
  }

  return text;
});