Class: EPUB::ContentDocument::Navigation

Inherits:
XHTML
  • Object
show all
Defined in:
lib/epub/content_document/navigation.rb

Defined Under Namespace

Modules: Hidable Classes: Item, ItemList, Navigation

Instance Attribute Summary collapse

Attributes inherited from XHTML

#item

Instance Method Summary collapse

Methods inherited from XHTML

#nokogiri, #read, #rexml, #title, #top_level?

Constructor Details

#initialize ⇒ Navigation

Returns a new instance of Navigation.



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# File 'lib/epub/content_document/navigation.rb', line 6

def initialize
  @navigations = []
  @hidden = false
  @parent = nil
  super
end

Instance Attribute Details

Returns the value of attribute navigations.



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# File 'lib/epub/content_document/navigation.rb', line 4

def navigations
  @navigations
end

Instance Method Details

#contents ⇒ Object

Enumerator version of toc



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# File 'lib/epub/content_document/navigation.rb', line 26

def contents
  enum_for(:each_content).to_a
end

#each_content ⇒ Object

iterator for #toc



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# File 'lib/epub/content_document/navigation.rb', line 39

def each_content
  toc.traverse do |content, _|
    yield content
  end
end

#each_landmark ⇒ Object

iterator for #landmark

Raises:

  • (NotImplementedError) 


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# File 'lib/epub/content_document/navigation.rb', line 51

def each_landmark
  raise NotImplementedError
end

#each_page ⇒ Object

iterator for #page_list

Raises:

  • (NotImplementedError) 


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# File 'lib/epub/content_document/navigation.rb', line 46

def each_page
  raise NotImplementedError
end

#landmarks ⇒ Object 



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# File 'lib/epub/content_document/navigation.rb', line 21

def landmarks
  navigations.find(&:landmarks?)
end

#navigation ⇒ Object 



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# File 'lib/epub/content_document/navigation.rb', line 55

def navigation
  navigations.first
end

#page_list ⇒ Object 



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# File 'lib/epub/content_document/navigation.rb', line 17

def page_list
  navigations.find(&:page_list?)
end

#pages ⇒ Object

Enumerator version of page_list

Usage: navigation.enum_for(:pages)

Raises:

  • (NotImplementedError) 


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# File 'lib/epub/content_document/navigation.rb', line 32

def pages
  raise NotImplementedError
end

#toc ⇒ Object 



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# File 'lib/epub/content_document/navigation.rb', line 13

def toc
  navigations.find(&:toc?)
end