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, added_margin, extra_style = '') ⇒ Object 



125
126
127
128
129
130
131
132
133
 
# File 'lib/mathjax_renderer/renderer.rb', line 125

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

  path
end

#ensure_started! ⇒ Object 



155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
 
# File 'lib/mathjax_renderer/renderer.rb', line 155

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

  sleep 0.1 until server_started?
end

#port ⇒ Object 



135
136
137
 
# File 'lib/mathjax_renderer/renderer.rb', line 135

def port
  server.config[:Port]
end

#response(content, added_margin, extra_style) ⇒ Object 



139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
 
# File 'lib/mathjax_renderer/renderer.rb', line 139

def response(content, added_margin, extra_style)
  "
    <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>.MathJax{position:absolute!important;margin:#{added_margin}px!important;}
#{extra_style}</style>
</head><body>#{content}</body></html>"
end

#server_started? ⇒ Boolean

Returns:

  • (Boolean) 


172
173
174
175
176
177
178
179
180
181
182
183
184
185
 
# File 'lib/mathjax_renderer/renderer.rb', line 172

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