Method: RubyXL::OOXMLObjectInstanceMethods#write_xml

Defined in:

lib/rubyXL/objects/ooxml_object.rb

#write_xml(xml = nil, node_name_override = nil) ⇒ Object

Recursively write the OOXML object and all its children out as Nokogiri::XML. Immediately before the actual generation, before_write_xml() is called to perform last-minute cleanup and validation operations; if it returns false, an empty string is returned (rather than nil, so Nokogiri::XML’s << operator can be used without additional nil checking)

Parameters

• xml - Base Nokogiri::XML object used for building. If omitted, a blank document will be generated.

• node_name_override - if present, is used instead of the default element name for this object provided by define_element_name

Examples

obj.write_xml()

Creates a new empty Nokogiri::XML, populates it with the OOXML structure as described in the respective definition, and returns the resulting Nokogiri::XML object.

obj.write_xml(seed_xml)

Using the passed-in Nokogiri xml object, creates a new element corresponding to obj according to its definition, along with all its properties and children, and returns the newly created element.

obj.write_xml(seed_xml, 'overriden_element_name')

Same as above, but uses the passed-in node_name_override as the new element name, instead of its default name set by define_element_name.

# File 'lib/rubyXL/objects/ooxml_object.rb', line 278

def write_xml(xml = nil, node_name_override = nil)
  if xml.nil? then
    seed_xml = Nokogiri::XML('<?xml version = "1.0" standalone ="yes"?>')
    seed_xml.encoding = 'UTF-8'

    if Nokogiri.jruby? then # Issue 188 workaround for JRuby
      seed_xml.to_java.strict_error_checking = false
    end

    result = self.write_xml(seed_xml)
    return result if result == ''
    seed_xml << result
    return seed_xml.to_xml({ :indent => 0, :save_with => Nokogiri::XML::Node::SaveOptions::AS_XML })
  end

  return '' unless before_write_xml

  attrs = {}

  obtain_class_variable(:@@ooxml_attributes).each_pair { |k, v|
    val = self.send(v[:accessor])

    if val.nil? then
      next unless v[:required]
      val = v[:default]
    end

    val = val &&
            case v[:attr_type]
            when :bool   then val ? '1' : '0'
            when :double then val.to_s.gsub(/\.0*\Z/, '') # Trim trailing zeroes
            else val
            end

    attrs[k] = val
  }

  element_text = attrs.delete('_')
  elem = xml.create_element(node_name_override || obtain_class_variable(:@@ooxml_tag_name), attrs, element_text)

  # First, populate namespaces from the original document
  @local_namespaces&.each_pair { |href, prefix| elem.add_namespace_definition(prefix, href) }

  # Then, add defaults. Note that if some namespace prefix was already set, Nokogiri will NOT change that namespace.
  obtain_class_variable(:@@ooxml_namespaces).each_pair { |href, prefix| elem.add_namespace_definition(prefix, href) }

  child_nodes = obtain_class_variable(:@@ooxml_child_nodes)
  child_nodes.each_pair { |child_node_name, child_node_params|
    node_obj = get_node_object(child_node_params)
    next if node_obj.nil?

    if node_obj.respond_to?(:write_xml) && !node_obj.equal?(self) then
      # If child node is either +OOXMLObject+, or +OOXMLContainerObject+ on its first (envelope) pass,
      # serialize that object.
      elem << node_obj.write_xml(xml, child_node_name)
    else
      # If child node is either vanilla +Array+, or +OOXMLContainerObject+ on its seconds (content) pass,
      # serialize its members.
      node_obj.each { |item| elem << item.write_xml(xml, child_node_name) unless item.nil? }
    end
  }
  elem
end