Redmine

#

# Support LaTeX math equations for Redmine.

#

# Ling Li, March 2011

#

require 'redmine'

RAILS_DEFAULT_LOGGER.info 'Redmine LaTeX MathJax'

Redmine::Plugin.register :latex_math do

    name 'LaTeX math equations'

    author 'Ling Li'

    description 'Enable LaTeX math equation in wiki and issues via MathJax.'

end

# After this macro is called, LaTeX equations will be processed by MathJax.

#

# {{EnableLaTeXMath}}

# \[ x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2a} \]

#

Redmine::WikiFormatting::Macros.register do

  desc "Enable LaTeX math equations via MathJax"

  macro :EnableLaTeXMath do |obj, args|

    args, options = extract_macro_options(args, :parent)

    if args.size > 0

      raise 'No arguments are needed.'

    end

    if defined? @IncludedMathJaxScript

      return ''

    end

    @IncludedMathJaxScript = 1

    # Dynamically load MathJax

    "<script type=\"text/javascript\">

//<![CDATA[

(function () {

  var script = document.createElement(\"script\");

  script.type = \"text/javascript\";

  script.src=\"http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML\";

  var config = 'MathJax.Hub.Config({' +

                 'extensions: [\"tex2jax.js\"],' +

                 'jax: [\"input/TeX\",\"output/HTML-CSS\"]' +

               '});' +

               'MathJax.Hub.Startup.onload();';

  if (window.opera) {script.innerHTML = config}

               else {script.text = config}

  document.getElementsByTagName(\"head\")[0].appendChild(script);

})();

//]]>

</script>"

  end

end