Class: RDF::RDFa::Reader::REXML::NodeProxy

Inherits:

Object

• Object
• RDF::RDFa::Reader::REXML::NodeProxy

show all

Defined in:

lib/rdf/rdfa/reader/rexml.rb

Overview

Instance Attribute Summary (collapse)

• - (Object) node readonly

  Returns the value of attribute node.

• - (Object) parent readonly

  Returns the value of attribute parent.

Instance Method Summary (collapse)

• - (String) base

  Return xml:base on element, if defined.

• - (NodeSetProxy) children

  Children of this node.

• - (Object) display_path
• - (Boolean) element?

  Node type accessors.

• - (NodeProxy) initialize(node, parent = nil) constructor

  A new instance of NodeProxy.

• - (String) inner_html

  Inner text of an element.

• - (String) inner_text

  Inner text of an element.

• - (String) language

  Element language.

• - (Object) method_missing(method, *args)

  Proxy for everything else to @node.

• - (Hash{String => String}) namespaces

  Retrieve XMLNS definitions for this element.

• - (Array<:text, :element, :attribute>) text_content?

  Return true of all child elements are text.

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 23

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

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 128

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

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 20

def node
  @node
end

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 21

def parent
  @parent
end

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 51

def base
  @node.attribute("base", RDF::XML.to_s)
end

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 93

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

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 55

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

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 122

def element?
  @node.is_a?(::REXML::Element)
end

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 114

def inner_html
  @node.children.map(&:to_s).join
end

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 102

def inner_text
  coder = HTMLEntities.new
  ::REXML::XPath.match(@node,'.//text()').map { |e|
    coder.decode(e)
  }.join
end

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.

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 38

def language
  language = case
  when @node.attribute("lang", RDF::XML.to_s)
    @node.attribute("lang", RDF::XML.to_s)
  when @node.attribute("lang")
    @node.attribute("lang").to_s
  end
end

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 80

def namespaces
  ns_decls = {}
  @node.attributes.each do |name, attr|
    next unless name =~ /^xmlns(?:\:(.+))?/
    ns_decls[$1] = attr
  end
  ns_decls
end

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# File 'lib/rdf/rdfa/reader/rexml.rb', line 72

def text_content?
  @node.children.all? {|c| c.is_a?(::REXML::Text)}
end