Class: Mathjax_Renderer::RendererServer

Inherits:
Object
  • Object
show all
Defined in:
lib/mathjax_renderer/renderer.rb

Instance Method Summary collapse

Instance Method Details

#add_content(content, extra_style = '', padding = 0) ⇒ Object 



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# File 'lib/mathjax_renderer/renderer.rb', line 137

def add_content(content, extra_style = '', padding = 0)
  digest = Digest::SHA1.hexdigest(content)
  path = "/#{digest}.html"
  server.mount_proc path do |_, res|
    res.body = response(content, extra_style, padding)
  end

  path
end

#ensure_started! ⇒ Object 



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# File 'lib/mathjax_renderer/renderer.rb', line 171

def ensure_started!
  if start!
    Thread.start do
      require 'webrick'
      mathjax_dir = Gem::Specification.find_by_name("rails-assets-MathJax").gem_dir

      self.server = WEBrick::HTTPServer.new(
        :Port => 0,
        :DocumentRoot => "#{mathjax_dir}/app/assets",
        :AccessLog => [],
        :Logger => WEBrick::Log::new('/dev/null', 7)
      )

      server.mount '/javascripts/MathJax/fonts',
                   WEBrick::HTTPServlet::FileHandler,
                   "#{mathjax_dir}/app/assets/fonts/MathJax/fonts"

      begin
        server.start
      ensure
        server.shutdown
      end
    end
  end
  def server_started?
    require 'net/http'
    uri = URI("http://localhost:#{port}/javascripts/MathJax/MathJax.js")

    req = Net::HTTP::Get.new(uri)
    res = Net::HTTP.start(uri.hostname, uri.port) {|http|
      http.read_timeout = 1
      http.request(req)
    }

    res.is_a?(Net::HTTPSuccess)
  rescue
    false
  end

  Timeout.timeout(5) do
    sleep 0.1 until server_started?
  end

end

#port ⇒ Object 



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# File 'lib/mathjax_renderer/renderer.rb', line 147

def port
  server.config[:Port]
end

#response(content, extra_style, padding) ⇒ Object 



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# File 'lib/mathjax_renderer/renderer.rb', line 151

def response(content, extra_style, padding)
  "
    <html><head>
  <script type='text/x-mathjax_renderer-config'>
      MathJax.Hub.Config({
        messageStyle: 'none',
        showMathMenu:false
      });
  </script>
  <script type='text/javascript'
        src='javascripts/MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
<style>body{display: flex;justify-content: center;}
#{extra_style}
.MathJax{
  left: #{padding}px;
  top: #{padding}px;
}</style>
</head><body>#{content}</body></html>"
end

#server_started? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mathjax_renderer/renderer.rb', line 195

def server_started?
  require 'net/http'
  uri = URI("http://localhost:#{port}/javascripts/MathJax/MathJax.js")

  req = Net::HTTP::Get.new(uri)
  res = Net::HTTP.start(uri.hostname, uri.port) {|http|
    http.read_timeout = 1
    http.request(req)
  }

  res.is_a?(Net::HTTPSuccess)
rescue
  false
end