Class: Thepub::Epub::NCX::NavMap

Inherits:
NavPoint
  • Object
show all
Defined in:
lib/thepub/epub/ncx.rb

Instance Attribute Summary collapse

Attributes inherited from NavPoint

#play_order, #points, #src, #title

Instance Method Summary collapse

Constructor Details

#initialize ⇒ NavMap

Returns a new instance of NavMap.



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# File 'lib/thepub/epub/ncx.rb', line 109

def initialize
  super(nil, nil)
  @depth = 1
end

Instance Attribute Details

#depth ⇒ Object (readonly)

Returns the value of attribute depth.



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# File 'lib/thepub/epub/ncx.rb', line 114

def depth
  @depth
end

Instance Method Details

#calc_depth_and_play_order ⇒ Object 



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# File 'lib/thepub/epub/ncx.rb', line 116

def calc_depth_and_play_order
  play_order = 0
  l = lambda do |points, depth|
    @depth = depth if depth > @depth
    points.each do |pt|
      pt.play_order = (play_order += 1)
      l.call(pt.points, depth + 1) unless pt.points.empty?
    end
  end
  l.call(@points, @depth = 1)
end

#to_xml(builder) ⇒ Object 



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# File 'lib/thepub/epub/ncx.rb', line 128

def to_xml(builder)
  builder.navMap do
    @points.each { |point| point.to_xml(builder) }
  end
end