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Class: ActionText::PlainTextConversion::BottomUpReducer

Do not use. This class is for internal use only.
Relationships & Source Files
Inherits: Object
Defined in: actiontext/lib/action_text/plain_text_conversion.rb

Class Method Summary

Instance Method Summary

Constructor Details

.new(node) ⇒ BottomUpReducer

[ GitHub ] 

  


# File 'actiontext/lib/action_text/plain_text_conversion.rb', line 127



def initialize(node)
  @node = node
  @values = {}
end


  







Instance Method Details



  

    #reduce(&block)  
  

  [ GitHub ]


  

  


# File 'actiontext/lib/action_text/plain_text_conversion.rb', line 132



def reduce(&block)
  traverse_bottom_up(@node) do |n|
    child_values = @values.values_at(*n.children)
    @values[n] = block.call(n, child_values)
  end
  @values[@node]
end


  








  

    #traverse_bottom_up(node, &block)   (private)
  

  [ GitHub ]


  

  


# File 'actiontext/lib/action_text/plain_text_conversion.rb', line 141



def traverse_bottom_up(node, &block)
  call_stack, processing_stack = [ node ], []

  until call_stack.empty?
    node = call_stack.pop
    processing_stack.push(node)
    call_stack.concat node.children
  end

  processing_stack.reverse_each(&block)
end