module Kramdown::Converter::MathEngine::Mathjax

def self.call(converter, el, opts)
  type = el.options[:category]
  text = (el.value =~ /<|&/ ? "% <![CDATA[\n#{el.value} %]]>" : el.value)
  text.gsub!(/<\/?script>?/, '')
  preview = preview_string(converter, el, opts)
  attr = {:type => "math/tex#{type == :block ? '; mode=display' : ''}"}
  if type == :block
    preview << converter.format_as_block_html('script', attr, text, opts[:indent])
  else
    preview << converter.format_as_span_html('script', attr, text)
  end
end

def self.preview_string(converter, el, opts)
  preview = converter.options[:math_engine_opts][:preview]
  return '' unless preview
  preview = (preview == true ? converter.escape_html(el.value) : preview.to_s)
  if el.options[:category] == :block
    converter.format_as_block_html('div', {'class' => 'MathJax_Preview'}, preview, opts[:indent])
  else
    converter.format_as_span_html('span', {'class' => 'MathJax_Preview'}, preview)
  end
end