Class: EpubWorm::Extractors::NcxNavigation

Inherits:
Object
  • Object
show all
Extended by:
Base
Defined in:
lib/epub_worm/extractors/ncx_navigation.rb

Constant Summary

Constants included from Base

Base::DEFAULT_NS

Class Method Summary collapse

Methods included from Base

as_xml, element_at, elements_at, extended, ns, ns_entry, open_opf, text_at

Class Method Details

.as_navigation(nav_point) ⇒ Object 



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# File 'lib/epub_worm/extractors/ncx_navigation.rb', line 41

def self.as_navigation(nav_point)
  ::EpubWorm::Navigation.new(
    title: text_at(nav_point, "ncx:navLabel/ncx:text"),
    reference: element_at(nav_point, "ncx:content")["src"],
    children: elements_at(nav_point, "ncx:navPoint").map { |e| as_navigation(e) }
  )
end

.extract(path) ⇒ Object 



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# File 'lib/epub_worm/extractors/ncx_navigation.rb', line 11

def self.extract(path)
  open_opf(path) do |opf_doc, opf_file_path, zip_file|
    toc_file_path = ::File.join(::File.dirname(opf_file_path), toc_reference(opf_doc))
    toc_file = zip_file.find_entry toc_file_path
    raise ::EpubWorm::Error, "toc file not found" unless toc_file

    toc_doc = as_xml toc_file
    nav_points = elements_at(toc_doc, "//ncx:navMap/ncx:navPoint")
    build_navigation nav_points
  end
end