Class: Xsdvi::Tree::Element

Inherits:
Object
  • Object
show all
Defined in:
lib/xsdvi/tree/element.rb

Overview

Represents a node in the tree structure

Direct Known Subclasses

SVG::Symbol

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Element

Returns a new instance of Element.



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# File 'lib/xsdvi/tree/element.rb', line 10

def initialize
  @parent = nil
  @children = []
end

Instance Attribute Details

#children ⇒ Object (readonly)

Returns the value of attribute children.



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# File 'lib/xsdvi/tree/element.rb', line 8

def children
  @children
end

#parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/xsdvi/tree/element.rb', line 7

def parent
  @parent
end

Instance Method Details

#add_child(child) ⇒ Object 



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# File 'lib/xsdvi/tree/element.rb', line 41

def add_child(child)
  children << child
end

#children? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/xsdvi/tree/element.rb', line 45

def children?
  !children.empty?
end

#code ⇒ Object 



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# File 'lib/xsdvi/tree/element.rb', line 49

def code
  buffer = []
  element = self
  while element.parent?
    buffer.unshift(element.index)
    buffer.unshift("_")
    element = element.parent
  end
  buffer.unshift("_1")
  buffer.join
end

#first_child? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/xsdvi/tree/element.rb', line 35

def first_child?
  return true unless parent?

  parent.children.first == self
end

#index ⇒ Object 



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# File 'lib/xsdvi/tree/element.rb', line 15

def index
  return 1 unless parent?

  parent.children.index(self) + 1
end

#last_child ⇒ Object 



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# File 'lib/xsdvi/tree/element.rb', line 25

def last_child
  children.last
end

#last_child? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/xsdvi/tree/element.rb', line 29

def last_child?
  return true unless parent?

  parent.children.last == self
end

#parent? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/xsdvi/tree/element.rb', line 21

def parent?
  !parent.nil?
end