Class: RDF::Microdata::Reader::Nokogiri::NodeProxy

Inherits:
Object
  • Object
show all
Defined in:
lib/rdf/microdata/reader/nokogiri.rb

Overview

Proxy class to implement uniform element accessors

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(node, parent = nil) ⇒ NodeProxy

Returns a new instance of NodeProxy.



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 21

def initialize(node, parent = nil)
  @node = node
  @parent = parent
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object

Proxy for everything else to @node



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 114

def method_missing(method, *args)
  @node.send(method, *args)
end

Instance Attribute Details

#node ⇒ Object (readonly)

Returns the value of attribute node.



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 18

def node
  @node
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 19

def parent
  @parent
end

Instance Method Details

#base ⇒ Object

Get any xml:base in effect for this element



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 51

def base
  if @base.nil?
    @base = attributes['xml:base'] ||
    (parent && parent.element? && parent.base) ||
    false
  end

  @base == false ? nil : @base
end

#children ⇒ NodeSetProxy

Children of this node

Returns:



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 94

def children
  NodeSetProxy.new(@node.children, self)
end

#display_path ⇒ Object 



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 61

def display_path
  @display_path ||= begin
    path = []
    path << parent.display_path if parent
    path << @node.name
    case @node
    when ::Nokogiri::XML::Element then path.join("/")
    when ::Nokogiri::XML::Attr    then path.join("@")
    else path.join("?")
    end
  end
end

#elements ⇒ NodeSetProxy

Elements of this node

Returns:



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 102

def elements
  NodeSetProxy.new(@node.elements, self)
end

#language ⇒ String

Element language

From HTML5 3.2.3.3 If both the lang attribute in no namespace and the lang attribute in the XML namespace are set on an element, user agents must use the lang attribute in the XML namespace, and the lang attribute in no namespace must be ignored for the purposes of determining the element’s language.

Returns:

  • (String) 


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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 36

def language
  language = case
  when @node.document.is_a?(::Nokogiri::XML::Document) && @node.attributes["xml:lang"]
    @node.attributes["xml:lang"].to_s
  when @node.document.is_a?(::Nokogiri::XML::Document) && @node.attributes["lang"]
    @node.attributes["lang"].to_s
  when @node.attribute("lang")
    @node.attribute("lang").to_s
  else
    parent && parent.element? && parent.language
  end
end

#namespaces ⇒ Hash{String => String}

Retrieve XMLNS definitions for this element

Returns:

  • (Hash{String => String}) 


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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 86

def namespaces
  @node.namespace_definitions.inject({}) {|memo, ns| memo[ns.prefix] = ns.href.to_s; memo }
end

#text_content? ⇒ Array<:text, :element, :attribute>

Return true of all child elements are text

Returns:

  • (Array<:text, :element, :attribute>) 


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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 78

def text_content?
  @node.children.all? {|c| c.text?}
end

#to_str ⇒ Object

Rational debug output



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# File 'lib/rdf/microdata/reader/nokogiri.rb', line 108

def to_str
  @node.path
end