Class: Moxml::Adapter::Rexml

Inherits:
Base
  • Object
show all
Defined in:
lib/moxml/adapter/rexml.rb

Constant Summary

Constants inherited from Base

Base::ENTITY_MARKER, Base::ENTITY_MARKER_RE, Base::ENTITY_NAME_PATTERN, Base::ENTITY_NAME_RE, Base::SERIALIZED_ENTITY_MARKER_RE, Base::STANDARD_ENTITIES

Class Method Summary collapse

Methods inherited from Base

actual_native, create_cdata, create_comment, create_declaration, create_doctype, create_element, create_entity_reference, create_namespace, create_processing_instruction, create_text, patch_node, prepare_for_new_document, preprocess_entities, restore_entities, sax_supported?

Methods included from XmlUtils

#encode_entities, #normalize_xml_value, #validate_comment_content, #validate_declaration_encoding, #validate_declaration_standalone, #validate_declaration_version, #validate_element_name, #validate_entity_reference_name, #validate_pi_target, #validate_prefix, #validate_uri

Class Method Details

.add_child(element, child) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 297

def add_child(element, child)
  # Special handling for declarations on REXML documents
  if element.is_a?(::REXML::Document) && child.is_a?(::REXML::XMLDecl)
    # Track declaration state in attachment map
    attachments.set(element, :xml_declaration, child)
  end

  case child
  when String
    element.add_text(child)
    append_child_sequence(element, :native)
  when ::Moxml::Adapter::CustomizedRexml::EntityReference
    # REXML doesn't support custom node types in its tree.
    # Store alongside native children via attachment map.
    refs = attachments.get(element, :entity_refs) || []
    refs << child
    attachments.set(element, :entity_refs, refs)
    append_child_sequence(element, :eref)
  else
    element.add(child)
    append_child_sequence(element, :native)
  end
end

.add_next_sibling(node, sibling) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 337

def add_next_sibling(node, sibling)
  parent = node.parent
  parent.insert_after(node, sibling)
end

.add_previous_sibling(node, sibling) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 327

def add_previous_sibling(node, sibling)
  parent = node.parent
  # caveat: Rexml fails if children belong to the same parent and are already in a correct order
  # example: "<root><a/><b/></root>"
  # add_previous_sibling(node_b, node_a)
  # result: "<root><b/><a/></root>"
  # expected result: "<root><a/><b/></root>"
  parent.insert_before(node, sibling)
end

.append_child_sequence(element, type) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 321

def append_child_sequence(element, type)
  seq = attachments.get(element, :child_sequence) || []
  seq << type
  attachments.set(element, :child_sequence, seq)
end

.at_xpath(node, expression, namespaces = {}) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 564

def at_xpath(node, expression, namespaces = {})
  results = xpath(node, expression, namespaces)
  results.first
end

.attachments ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 13

def attachments
  @attachments ||= Moxml::NativeAttachment.new
end

.attribute_element(attribute) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 263

def attribute_element(attribute)
  attribute.element
end

.attributes(element) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 255

def attributes(element)
  return [] unless element.is_a?(::REXML::Element)

  # Only return non-namespace attributes
  element.attributes.values
    .reject { |attr| attr.prefix.to_s.start_with?("xmlns") }
end

.cdata_content(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 391

def cdata_content(node)
  node.value
end

.children(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 177

def children(node)
  return [] unless node.is_a?(::REXML::Parent)

  # Get all children and filter out empty text nodes between elements
  result = node.children.reject do |child|
    child.is_a?(::REXML::Text) &&
      child.to_s.strip.empty? &&
      !(child.next_sibling.nil? && child.previous_sibling.nil?)
  end

  # Include any EntityReference wrappers stored alongside native children
  entity_refs = attachments.get(node, :entity_refs)
  result.concat(entity_refs) if entity_refs

  # Ensure uniqueness by object_id to prevent duplicates
  result.uniq(&:object_id)
end

.comment_content(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 383

def comment_content(node)
  node.string
end

.create_document(_native_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 77

def create_document(_native_doc = nil)
  ::REXML::Document.new
end

.create_native_cdata(content, _owner_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 97

def create_native_cdata(content, _owner_doc = nil)
  ::REXML::CData.new(content.to_s)
end

.create_native_comment(content, _owner_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 101

def create_native_comment(content, _owner_doc = nil)
  ::REXML::Comment.new(content.to_s)
end

.create_native_declaration(version, encoding, standalone) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 110

def create_native_declaration(version, encoding, standalone)
  ::REXML::XMLDecl.new(version, encoding&.downcase, standalone)
end

.create_native_doctype(name, external_id, system_id) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 114

def create_native_doctype(name, external_id, system_id)
  return nil unless name

  parts = [name]
  if external_id
    parts.push("PUBLIC", %("#{external_id}"))
    parts << %("#{system_id}") if system_id
  elsif system_id
    parts.push("SYSTEM", %("#{system_id}"))
  end

  ::REXML::DocType.new(parts.join(" "))
end

.create_native_element(name, _owner_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 81

def create_native_element(name, _owner_doc = nil)
  ::REXML::Element.new(name.to_s)
end

.create_native_entity_reference(name) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 89

def create_native_entity_reference(name)
  ::Moxml::Adapter::CustomizedRexml::EntityReference.new(name)
end

.create_native_namespace(element, prefix, uri) ⇒ Object

add a namespace definition, keep the element name unchanged



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# File 'lib/moxml/adapter/rexml.rb', line 464

def create_native_namespace(element, prefix, uri)
  element.add_namespace(prefix.to_s, uri)
  ::REXML::Attribute.new(prefix.to_s, uri, element)
end

.create_native_processing_instruction(target, content) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 105

def create_native_processing_instruction(target, content)
  # Clone strings to avoid frozen string errors
  ::REXML::Instruction.new(target.to_s.dup, content.to_s.dup)
end

.create_native_text(content, _owner_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 85

def create_native_text(content, _owner_doc = nil)
  ::REXML::Text.new(content.to_s, true, nil)
end

.declaration_attribute(node, name) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 361

def declaration_attribute(node, name)
  case name
  when "version"
    node.version
  when "encoding"
    node.encoding
  when "standalone"
    node.standalone
  end
end

.doctype_external_id(native) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 525

def doctype_external_id(native)
  native.public
end

.doctype_name(native) ⇒ Object

Doctype accessor methods



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# File 'lib/moxml/adapter/rexml.rb', line 521

def doctype_name(native)
  native.name
end

.doctype_system_id(native) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 529

def doctype_system_id(native)
  native.system
end

.document(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 247

def document(node)
  node.document
end

.duplicate_node(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 169

def duplicate_node(node)
  if node.respond_to?(:deep_clone)
    node.deep_clone
  else
    Marshal.load(Marshal.dump(node))
  end
end

.entity_reference_name(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 93

def entity_reference_name(node)
  node.name if node.is_a?(::Moxml::Adapter::CustomizedRexml::EntityReference)
end

.extract_encoding_from_xml(xml) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 47

def extract_encoding_from_xml(xml)
  # Match XML declaration pattern: <?xml version="..." encoding="..."?>
  # Use atomic group (?>) to prevent polynomial backtracking ReDoS
  match = xml.match(/<\?xml(?>[^>]*)\bencoding\s*=\s*["']([^"']+)["']/i)
  match ? match[1] : "UTF-8"
end

.extract_text_recursively(element) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 423

def extract_text_recursively(element)
  return "" unless element

  text = ""
  element.children.each do |child|
    case child
    when ::REXML::Text
      # Preserve original spacing from text nodes exactly including newlines and all whitespace
      text += child.value
    when ::REXML::Element
      # Extract text recursively from child element
      child_text = extract_text_recursively(child)
      # Concatenate directly like other adapters - NO SPACE INSERTION
      text += child_text
    end
  end
  # Don't strip - preserve original spacing including newlines
  text
end

.get_attribute(element, name) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 285

def get_attribute(element, name)
  element.attributes.get_attribute(name)
end

.get_attribute_value(element, name) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 289

def get_attribute_value(element, name)
  element.attributes[name]
end

.has_declaration?(native_doc, wrapper) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/rexml.rb', line 616

def has_declaration?(native_doc, wrapper)
  xml_decl = attachments.get(native_doc, :xml_declaration)
  if xml_decl.nil?
    # Attachment key doesn't exist - check native doc or wrapper flag
    if attachments.key?(native_doc, :xml_declaration)
      # Explicitly set to nil (was removed)
      false
    else
      wrapper.has_xml_declaration
    end
  else
    true
  end
end

.in_scope_namespaces(element) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 510

def in_scope_namespaces(element)
  namespaces = {}
  element.namespaces.each do |prefix, uri|
    key = prefix.to_s.empty? ? "xmlns" : prefix.to_s
    ns = ::REXML::Attribute.new(key, uri, element)
    namespaces[prefix] = ns
  end
  namespaces.values
end

.inner_text(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 443

def inner_text(node)
  # Get direct text children only, filter duplicates
  text_children = node.children
    .grep(::REXML::Text)
    .uniq(&:object_id)
  text_children.map(&:value).join
end

.namespace(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 489

def namespace(node)
  prefix = node.prefix
  uri = node.namespace(prefix)
  return if prefix.to_s.empty? && uri.to_s.empty?

  owner = node.is_a?(::REXML::Attribute) ? node.element : node
  ::REXML::Attribute.new(prefix, uri, owner)
end

.namespace_definitions(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 498

def namespace_definitions(node)
  return [] unless node.is_a?(::REXML::Element)

  result = []
  node.attributes.each_attribute do |attr|
    next unless attr.prefix == "xmlns" || (attr.name == "xmlns" && attr.prefix.to_s.empty?)

    result << attr
  end
  result
end

.namespace_prefix(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 481

def namespace_prefix(node)
  node.name unless node.name == "xmlns"
end

.namespace_uri(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 485

def namespace_uri(node)
  node.value
end

.next_sibling(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 199

def next_sibling(node)
  current = node.next_sibling

  # Skip empty text nodes and duplicates
  seen = Set.new
  while current
    if current.is_a?(::REXML::Text) && current.to_s.strip.empty?
      current = current.next_sibling
      next
    end

    # Check for duplicates
    if seen.include?(current.object_id)
      current = current.next_sibling
      next
    end

    seen.add(current.object_id)
    break
  end

  current
end

.node_name(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 158

def node_name(node)
  case node
  when ::REXML::Element, ::REXML::DocType
    node.name
  when ::REXML::XMLDecl
    "xml"
  when ::REXML::Instruction
    node.target
  end
end

.node_type(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 132

def node_type(node)
  case node
  when ::REXML::Document then :document
  when ::REXML::Element then :element
  when ::REXML::CData then :cdata
  when ::REXML::Text then :text
  when ::REXML::Comment then :comment
  when ::REXML::Attribute then :attribute # but in fact it may be a namespace as well
  when ::REXML::Namespace then :namespace # we don't use this one
  when ::REXML::Instruction then :processing_instruction
  when ::REXML::DocType then :doctype
  when ::REXML::XMLDecl then :declaration
  when ::Moxml::Adapter::CustomizedRexml::EntityReference then :entity_reference
  else :unknown
  end
end

.parent(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 195

def parent(node)
  node.parent
end

.parse(xml, options = {}, _context = nil) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 17

def parse(xml, options = {}, _context = nil)
  xml = "" if xml.nil?

  # Handle frozen strings by creating a mutable copy
  processed_xml = if xml.frozen?
                    xml.dup.force_encoding("UTF-8").encode("UTF-8")
                  else
                    xml.force_encoding("UTF-8").encode("UTF-8")
                  end

  # Preprocess entities to avoid double-escaping on output
  processed_xml = preprocess_entities(processed_xml)

  native_doc = begin
    ::REXML::Document.new(processed_xml)
  rescue ::REXML::ParseException => e
    if options[:strict]
      raise Moxml::ParseError.new(
        e.message,
        line: e.line,
        source: xml.is_a?(String) ? xml[0..100] : nil,
      )
    end
    create_document
  end

  ctx = _context || Context.new(:rexml)
  DocumentBuilder.new(ctx).build(native_doc)
end

.prepare_xpath_namespaces(node) ⇒ Object

not used at the moment but may be useful when the xpath is upgraded to work with namespaces



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# File 'lib/moxml/adapter/rexml.rb', line 535

def prepare_xpath_namespaces(node)
  ns = {}

  # Get all namespace definitions in scope
  all_ns = namespace_definitions(node)

  # Convert to XPath-friendly format
  all_ns.each do |prefix, uri|
    if prefix.to_s.empty?
      ns["xmlns"] = uri
    else
      ns[prefix] = uri
    end
  end

  ns
end

.previous_sibling(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 223

def previous_sibling(node)
  current = node.previous_sibling

  # Skip empty text nodes and duplicates
  seen = Set.new
  while current
    if current.is_a?(::REXML::Text) && current.to_s.strip.empty?
      current = current.previous_sibling
      next
    end

    # Check for duplicates
    if seen.include?(current.object_id)
      current = current.previous_sibling
      next
    end

    seen.add(current.object_id)
    break
  end

  current
end

.processing_instruction_content(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 403

def processing_instruction_content(node)
  node.content
end

.processing_instruction_target(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 399

def processing_instruction_target(node)
  node.target
end

.remove(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 342

def remove(node)
  # Special handling for declarations on REXML documents
  if node.is_a?(::REXML::XMLDecl) && node.parent.is_a?(::REXML::Document)
    # Clear declaration state in attachment map
    attachments.set(node.parent, :xml_declaration, nil)
  end

  node.remove
end

.remove_attribute(element, name) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 293

def remove_attribute(element, name)
  element.delete_attribute(name.to_s)
end

.replace(node, new_node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 352

def replace(node, new_node)
  node.replace_with(new_node)
end

.replace_children(element, children) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 356

def replace_children(element, children)
  element.children.each(&:remove)
  children.each { |child| element.add(child) }
end

.root(document) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 251

def root(document)
  document.root
end

.sax_parse(xml, handler) ⇒ void

This method returns an undefined value.

SAX parsing implementation for REXML

Parameters:



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# File 'lib/moxml/adapter/rexml.rb', line 59

def sax_parse(xml, handler)
  require "rexml/parsers/sax2parser"
  require "rexml/source"
  require "stringio"

  bridge = REXMLSAX2Bridge.new(handler)

  xml_string = xml.is_a?(IO) || xml.is_a?(StringIO) ? xml.read : xml.to_s
  source = ::REXML::IOSource.new(StringIO.new(xml_string))

  parser = ::REXML::Parsers::SAX2Parser.new(source)
  parser.listen(bridge)
  parser.parse
rescue ::REXML::ParseException => e
  error = Moxml::ParseError.new(e.message, line: e.line)
  handler.on_error(error)
end

.serialize(node, options = {}) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 569

def serialize(node, options = {})
  output = +""

  if node.is_a?(::REXML::Document)
    # Check if we should include declaration
    # Priority: explicit option > check if document has xml_decl
    should_include_decl = if options.key?(:no_declaration)
                            !options[:no_declaration]
                          else
                            # Include declaration only if document has xml_decl
                            !node.xml_decl.nil?
                          end

    # Include XML declaration only if should_include_decl and xml_decl exists
    if should_include_decl && node.xml_decl
      decl = node.xml_decl
      decl.encoding = options[:encoding] if options[:encoding]
      output << "<?xml"
      output << %( version="#{decl.version}") if decl.version
      output << %( encoding="#{decl.encoding}") if decl.encoding
      output << %( standalone="#{decl.standalone}") if decl.standalone
      output << "?>"
    end

    # output << "\n"
    node.doctype&.write(output)

    # Write processing instructions
    node.children.each do |child|
      next unless [::REXML::Instruction, ::REXML::CData,
                   ::REXML::Comment, ::REXML::Text].include?(child.class)

      write_with_formatter(child, output, options[:indent] || 2)
      # output << "\n"
    end

    if node.root
      write_with_formatter(node.root, output,
                           options[:indent] || 2)
    end
  else
    write_with_formatter(node, output, options[:indent] || 2)
  end

  output.strip
end

.set_attribute(element, name, value) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 267

def set_attribute(element, name, value)
  element.attributes[name&.to_s] = value&.to_s
  element.attributes.get_attribute(name&.to_s)
end

.set_attribute_name(attribute, name) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 272

def set_attribute_name(attribute, name)
  old_name = attribute.expanded_name
  attribute.name = name
  # Rexml doesn't change the keys of the attributes hash
  element = attribute.element
  element.attributes.delete(old_name)
  element.attributes << attribute
end

.set_attribute_value(attribute, value) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 281

def set_attribute_value(attribute, value)
  attribute.normalized = value
end

.set_cdata_content(node, content) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 395

def set_cdata_content(node, content)
  node.value = content.to_s
end

.set_comment_content(node, content) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 387

def set_comment_content(node, content)
  node.string = content.to_s
end

.set_declaration_attribute(node, name, value) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 372

def set_declaration_attribute(node, name, value)
  case name
  when "version"
    node.version = value
  when "encoding"
    node.encoding = value
  when "standalone"
    node.standalone = value
  end
end

.set_namespace(element, ns) ⇒ Object

add a namespace prefix to the element name AND a namespace definition



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# File 'lib/moxml/adapter/rexml.rb', line 470

def set_namespace(element, ns)
  prefix = ns.name.to_s.empty? ? "xmlns" : ns.name.to_s
  if element.is_a?(::REXML::Element)
    element.add_namespace(prefix,
                          ns.value)
  end
  element.name = "#{prefix}:#{element.name}"
  owner = element.is_a?(::REXML::Attribute) ? element.element : element
  ::REXML::Attribute.new(prefix, ns.value, owner)
end

.set_node_name(node, name) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 149

def set_node_name(node, name)
  case node
  when ::REXML::Element
    node.name = name.to_s
  when ::REXML::Instruction
    node.target = name.to_s
  end
end

.set_processing_instruction_content(node, content) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 407

def set_processing_instruction_content(node, content)
  node.content = content.to_s
end

.set_root(doc, element) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 128

def set_root(doc, element)
  doc.add_element(element)
end

.set_text_content(node, content) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 451

def set_text_content(node, content)
  case node
  when ::REXML::Text, ::REXML::CData
    node.value = content.to_s
  when ::REXML::Element
    # Remove existing text nodes to prevent duplicates
    node.texts.each(&:remove)
    # Add new text content
    node.add_text(content.to_s)
  end
end

.text_content(node) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 411

def text_content(node)
  case node
  when ::REXML::Text, ::REXML::CData
    node.value.to_s
  when ::Moxml::Adapter::CustomizedRexml::EntityReference
    ""
  when ::REXML::Element
    # Extract text recursively from all children to match other adapters
    extract_text_recursively(node)
  end.to_s
end

.xpath(node, expression, _namespaces = {}) ⇒ Object 



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# File 'lib/moxml/adapter/rexml.rb', line 553

def xpath(node, expression, _namespaces = {})
  node.get_elements(expression).to_a
rescue ::REXML::ParseException => e
  raise Moxml::XPathError.new(
    e.message,
    expression: expression,
    adapter: "REXML",
    node: node,
  )
end