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Class: ActionView::StreamingFlow

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, OutputFlow
Instance Chain:
self, OutputFlow
Inherits: ActionView::OutputFlow
Defined in: actionview/lib/action_view/flows.rb

Class Method Summary

OutputFlow - Inherited

.new

Instance Attribute Summary

OutputFlow - Inherited

#content

Instance Method Summary

OutputFlow - Inherited

#append

Called by content_for.
#append!

Alias for OutputFlow#append.
#get

Called by _layout_for to read stored values.
#set

Called by each renderer object to set the layout contents.

Constructor Details

.new(view, fiber) ⇒ StreamingFlow

[ GitHub ] 

  


# File 'actionview/lib/action_view/flows.rb', line 31



def initialize(view, fiber)
  @view    = view
  @parent  = nil
  @child   = view.output_buffer
  @content = view.view_flow.content
  @fiber   = fiber
  @root    = Fiber.current.object_id
end


  







Instance Attribute Details



  

    #inside_fiber?  ⇒ Boolean  (readonly, private)
  

  [ GitHub ]


  

  


# File 'actionview/lib/action_view/flows.rb', line 71



def inside_fiber?
  Fiber.current.object_id != @root
end


  







Instance Method Details



  

    #append!(key, value)  
  



  

    

Appends the contents for the given key. This is called by providing and resuming back to the fiber, if that’s the key it’s waiting for.


  



  [ GitHub ]


  

  


# File 'actionview/lib/action_view/flows.rb', line 65



def append!(key, value)
  super
  @fiber.resume if @waiting_for == key
end


  








  

    #get(key)  
  



  

    

Try to get stored content. If the content is not available and we’re inside the layout fiber, then it will begin waiting for the given key and yield.


  



  [ GitHub ]


  

  


# File 'actionview/lib/action_view/flows.rb', line 43



def get(key)
  return super if @content.key?(key)

  if inside_fiber?
    view = @view

    begin
      @waiting_for = key
      view.output_buffer, @parent = @child, view.output_buffer
      Fiber.yield
    ensure
      @waiting_for = nil
      view.output_buffer, @child = @parent, view.output_buffer
    end
  end

  super
end