Class: JsRender::Renderer

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

Constant Summary collapse

GLOBAL_CONTEXT = 
<<-JS
  var global = global || this;
  var self = self || this;
  var window = window || this;
JS

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(component_name, data) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/js_render/renderer.rb', line 13

def initialize(component_name, data)
  @component_name = component_name
  data = data.to_json if !data.is_a?(String)
  @json_data = data
  @uuid = SecureRandom.uuid
end

Instance Attribute Details

#component_name ⇒ Object

Returns the value of attribute component_name.



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# File 'lib/js_render/renderer.rb', line 5

def component_name
  @component_name
end

#json_data ⇒ Object

Returns the value of attribute json_data.



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# File 'lib/js_render/renderer.rb', line 5

def json_data
  @json_data
end

#uuid ⇒ Object

Returns the value of attribute uuid.



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# File 'lib/js_render/renderer.rb', line 5

def uuid
  @uuid
end

Instance Method Details

#generate_client_script ⇒ Object 



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# File 'lib/js_render/renderer.rb', line 42

def generate_client_script
  func_name = JsRender.config.client_render_function.gsub('*', @component_name)
  <<-HTML
    <script>
      typeof #{func_name} === 'function' && #{func_name}('#{@uuid}', #{@json_data});
    </script>
  HTML
end

#generate_html ⇒ Object 



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# File 'lib/js_render/renderer.rb', line 27

def generate_html
  func_name = JsRender.config.server_render_function.gsub('*', @component_name)
  server_code = <<-JS
    (function () {
      var serverStr = typeof #{func_name} === 'function' ? #{func_name}(#{@json_data}) : '';
      return '<span id="#{@uuid}">' + serverStr + '</span>';
    })()
  JS
  renderer_code = js_context(find_renderer)
  context = ::ExecJS.compile(GLOBAL_CONTEXT + renderer_code)
  context.eval(server_code)
rescue ExecJS::RuntimeError, ExecJS::ProgramError => error
  raise JsRender::ServerRenderError::new(@component_name, @json_data, error)
end

#render_component ⇒ Object 



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# File 'lib/js_render/renderer.rb', line 20

def render_component
  server_html = generate_html
  client_script = generate_client_script
  component = (server_html + client_script)
  component.respond_to?(:html_safe) ? component.html_safe : component
end