Class: BbEPUB::Transform::Spine

Inherits:
Bookbinder::Transform
  • Object
show all
Defined in:
lib/bb-epub/transform/spine.rb

Instance Method Summary collapse

Instance Method Details

#dependencies ⇒ Object 



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# File 'lib/bb-epub/transform/spine.rb', line 3

def dependencies
  [BbEPUB::Transform::Resources]
end

#from_map(package) ⇒ Object 



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# File 'lib/bb-epub/transform/spine.rb', line 24

def from_map(package)
  opf_doc = package.file(:opf).document

  package.map['spine'].each { |cmpt|
    # Convert component to valid XHTML
    cmpt_file = package.file(cmpt['path'])
    cmpt_doc = cmpt_file.document
    # Add the EPUB namespace:
    # FIXME: only add the EPUB namespace if there are any epub:* attrs?
    cmpt_doc.add_namespace('epub')

    # Update the OPF manifest
    opf_doc.new_node('item', :append => 'opf|manifest') { |manifest_item_tag|
      manifest_item_tag['href'] = package.make_href(cmpt['path'])
      manifest_item_tag['id'] = cmpt['id']
      manifest_item_tag['media-type'] = cmpt['media-type']
      props = component_properties(cmpt, cmpt_doc)
      manifest_item_tag['properties'] = props.join(' ')  if props.any?
    }

    # Update the OPF spine
    opf_doc.new_node('itemref', :append => 'opf|spine') { |spine_item_tag|
      spine_item_tag['idref'] = cmpt['id']
      spine_item_tag['linear'] = 'no'  unless cmpt['linear']
    }
  }
end

#to_map(package) ⇒ Object 



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# File 'lib/bb-epub/transform/spine.rb', line 8

def to_map(package)
  opf_doc = package.file(:opf).document('r')
  itemrefs = opf_doc.search('opf|spine > opf|itemref')
  package.map['spine'] = itemrefs.collect { |itemref|
    cmpt = package.map['resources'].detect { |r| r['id'] == itemref['idref'] }
    if cmpt
      package.map['resources'].delete(cmpt)
      cmpt['linear'] = itemref['linear'] == 'no' ? false : true
      cmpt
    else
      package.warn("No manifest item for spine idref: #{itemref['idref']}")
    end
  }.compact
end