Module: PDFRavager::FieldTypes::XFA

Included in:
PDFRavager::Fields::Checkbox, PDFRavager::Fields::Radio, PDFRavager::Fields::RichText, PDFRavager::Fields::Text
Defined in:
lib/pdf_ravager/field_types/xfa.rb

Instance Method Summary collapse

Instance Method Details

#set_xfa_value(xfa) ⇒ Object 



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# File 'lib/pdf_ravager/field_types/xfa.rb', line 19

def set_xfa_value(xfa)
  # the double-load is to work around a Nokogiri bug I found:
  # https://github.com/sparklemotion/nokogiri/issues/781
  doc = Nokogiri::XML(Nokogiri::XML::Document.wrap(xfa.getDomDocument).to_xml)
  # first, assume the user-provided field name is an xpath and use it directly:
  strict_match =
    begin
      doc.xpath(xfa_name)
    rescue Nokogiri::XML::XPath::SyntaxError
      []
    end
  # otherwise, we'll loosely match the field name anywhere in the document:
  loose_match = doc.xpath("//*[local-name()='field'][@name='#{xfa_name}']")
  matched_nodes = strict_match.any? ? strict_match : loose_match
  matched_nodes.each do |node|
    value_node = node.at_xpath("*[local-name()='value']")
    if value_node
      text_node = value_node.at_xpath("*[local-name()='#{xfa_node_type}']")
      if text_node
        # Complete node structure already exists - just set the value
        text_node.content = xfa_value
      else
        # <value> node exists, but without child <text> node
        Nokogiri::XML::Builder.with(value_node) do |xml|
          xml.text_ {
            xml.send("#{xfa_node_type}_", xfa_value)
          }
        end
      end
    else
      # No <value> node exists - create whole structure
      Nokogiri::XML::Builder.with(node) do |xml|
        xml.value_ {
          xml.send("#{xfa_node_type}_") {
            xml.text xfa_value
          }
        }
      end
    end
  end
  xfa.setDomDocument(doc.to_java)
  xfa.setChanged(true)
end

#xfa_name ⇒ Object 



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# File 'lib/pdf_ravager/field_types/xfa.rb', line 11

def xfa_name
  @name
end

#xfa_node_type ⇒ Object 



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# File 'lib/pdf_ravager/field_types/xfa.rb', line 7

def xfa_node_type
  'text'
end

#xfa_value ⇒ Object 



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# File 'lib/pdf_ravager/field_types/xfa.rb', line 15

def xfa_value
  @value.to_s
end