Module: Kramdown::Converter::MathEngine::Mathjax

Defined in:
lib/kramdown/converter/math_engine/mathjax.rb

Overview

Uses the MathJax javascript library for displaying math.

Note that the javascript library itself is not include or linked, this has to be done separately. Only the math content is marked up correctly.

Class Method Summary collapse

Class Method Details

.call(converter, el, opts) ⇒ Object 



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# File 'lib/kramdown/converter/math_engine/mathjax.rb', line 18

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

.preview_string(converter, el, opts) ⇒ Object 



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# File 'lib/kramdown/converter/math_engine/mathjax.rb', line 33

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)

  preview_as_code = converter.options[:math_engine_opts][:preview_as_code]

  if el.options[:category] == :block
    if preview_as_code
      converter.format_as_block_html('pre', {'class' => 'MathJax_Preview'},
                                     converter.format_as_span_html('code', {}, preview),
                                     opts[:indent])
    else
      converter.format_as_block_html('div', {'class' => 'MathJax_Preview'}, preview,
                                     opts[:indent])
    end
  else
    converter.format_as_span_html(preview_as_code ? 'code' : 'span',
                                  {'class' => 'MathJax_Preview'}, preview)
  end
end