Class: CiteProc::Ruby::Renderer::ItemObserver

Inherits:
Object
  • Object
show all
Defined in:
lib/citeproc/ruby/renderer/observer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(item, history = {}) ⇒ ItemObserver

Returns a new instance of ItemObserver.



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# File 'lib/citeproc/ruby/renderer/observer.rb', line 9

def initialize(item, history = {})
  @item, @history = item, history
end

Instance Attribute Details

#history ⇒ Object

Returns the value of attribute history.



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# File 'lib/citeproc/ruby/renderer/observer.rb', line 7

def history
  @history
end

#item ⇒ Object

Returns the value of attribute item.



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# File 'lib/citeproc/ruby/renderer/observer.rb', line 7

def item
  @item
end

Instance Method Details

#accessed ⇒ Object 



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# File 'lib/citeproc/ruby/renderer/observer.rb', line 33

def accessed
  history.select { |key, value| !value.nil? }.keys
end

#clear! ⇒ Object 



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# File 'lib/citeproc/ruby/renderer/observer.rb', line 37

def clear!
  history.clear
  self
end

#skip? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/citeproc/ruby/renderer/observer.rb', line 27

def skip?
  !history.empty? && history.values.all? { |v|
    v.nil? || v.respond_to?(:empty?) && v.empty?
  }
end

#start ⇒ Object 



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# File 'lib/citeproc/ruby/renderer/observer.rb', line 13

def start
  item.add_observer(self)
  self
end

#stop ⇒ Object 



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# File 'lib/citeproc/ruby/renderer/observer.rb', line 18

def stop
  item.delete_observer(self)
  self
end

#update(method, key, value) ⇒ Object 



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# File 'lib/citeproc/ruby/renderer/observer.rb', line 23

def update(method, key, value)
  history[key] = value if method == :read
end