Class: Moxml::Adapter::Leptris

Inherits:
Base
  • Object
show all
Extended by:
DocumentParts, Markers, Materialize, Serialize
Defined in:
lib/moxml/adapter/leptris.rb,
lib/moxml/adapter/leptris/markers.rb,
lib/moxml/adapter/leptris/serialize.rb,
lib/moxml/adapter/leptris/sax_bridge.rb,
lib/moxml/adapter/leptris/materialize.rb,
lib/moxml/adapter/leptris/document_parts.rb

Overview

Adapter over the leptris FFI binding (libleptris C library).

libleptris provides DOM parsing, a native XPath 1.0 engine, SAX, and serialization. Its document-level creation surfaces exist (set_doctype 1.9.176/#212, declaration setters #1094) but are SET-ONLY — no unset for declaration, DOCTYPE, or document PIs — while the moxml facade contract makes those parts removable nodes. CustomizedLeptris value objects therefore remain the lifecycle record, attached through NativeAttachment.

Defined Under Namespace

Modules: DocumentParts, Identity, Markers, Materialize, Serialize Classes: LeptrisSAXBridge

Constant Summary collapse

MINIMUM_BINDING_VERSION =

The binding floor (issue #149): 1.9.32 carried the traverse fix (leptris-ruby#89) and made built documents reflect their parts immediately (leptris-ruby#91); the document node (1.9.26), DTDATTR (1.9.8), and the batch child-pointer read (1.7.0) surfaces predate it. Older bindings are not eligible for the default (see Config.leptris_preferred_available?) and the adapter no longer carries accommodation paths for them. Raised 1.9.32 -> 1.9.194.1 (2026-09-20): every known consumer resolves a modern binding (canon itself pins ~> 1.9.193), and the sub-1.9.194 accommodation paths are deleted.

"1.9.194.1"
ATTR_RESULT_NATIVE =

leptris_parse_html_string shipped in bindings 1.9.80 (libleptris 1.9.75, engine #659) as Leptris::XML.parse_html. Attribute-node xpath results carry proper wrappers since 1.9.105 (leptris-ruby#153: ResultAttr with name/value); before that the native gate routed them to the Ruby engine.

true
DIGEST_SUPPORTED =

leptris_node_digest shipped in bindings 1.9.99 (libleptris 1.9.99, engine #869): on-demand Merkle subtree hash, zero cost when unused. Below it, Node#digest answers nil.

Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.99")
NATIVE_XPATH_SEAMS =

1.9.163.7 added the XPath seams (TODO.perf/15+16): Searchable#at_xpath materializes nodeset entry 0 and frees the handle in one C dispatch — no NodeSet container, no AutoPointer (2.8x on repeat at_xpath) — and CompiledXPath#eval_ptrs runs the compiled handle against raw pointers, skipping the per-call EvaluationContext (~2us on every multi-result query).

defined?(::Leptris::XML::Native) &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.163.7")
NATIVE_READ_LAYER = 
defined?(::Leptris::XML::NativeNode) &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.162.6")
NATIVE_STRINGS_UTF8 =

1.9.163.2's native layer returns UTF-8, unfrozen strings (1.9.162.x answered ASCII-8BIT — the reads retagged with a dup+force_encoding per call).

defined?(::Leptris::XML::NativeNode) &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.163.2")
NATIVE_MUTATIONS_COHERENT =

1.9.163.5 (leptris-ruby#204/#208): native mutations are version-coherent with the binding (both surfaces' memos drop on mutation) — the builder factories and native add_child are adoptable end-to-end; NativeNode grew a document accessor and line numbers.

defined?(::Leptris::XML::NativeNode) &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.163.5")
NN = 
::Leptris::XML::NativeNode
NN_ATTRIBUTE = 
NN.instance_method(:attribute)
NN_NAME = 
NN.instance_method(:name)
NN_PARENT = 
NN.instance_method(:parent)
NN_NEXT_SIBLING = 
NN.instance_method(:next_sibling)
NN_CONTENT = 
NN.instance_method(:content)
NN_CHILDREN = 
NN.instance_method(:children)
NN_NODE_TYPE = 
NN.instance_method(:node_type)
NN_DOCUMENT = 
NN.instance_method(:document)
NN_ADD_CHILD = 
NN.instance_method(:add_child)
NATIVE_SOURCE_POSITION =

1.9.181 (lockstep): Node#source_position — col_start, col_end from the engine's source-position API (upstream #1124); created nodes report zeros.

Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.181")
NATIVE_ENTITY_REFS =

Entity-reference preservation (leptris-ruby#212 / upstream #1094): 1.9.177 ships ParseOptions.keep_entity_refs plus first-class EntityReference nodes — the marker machinery becomes bypassable when the Context's entity_mode is :keep.

defined?(::Leptris::XML::EntityReference) &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.177")
NATIVE_BULK_FIXED =

1.9.163.2 moved the native bulk children into C (Native.bulk_children) and fixed the 512 truncation (leptris-ruby#202). The 162.6-163.1 window carries the binding-side truncation, so moxml fetches with its own count-then-copy scratch there; newer bindings use their C bulk path (version-memoized, cheaper than a per-call count+copy).

defined?(::Leptris::XML::NativeNode) &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.163.2")
NATIVE_IDENTITY = 
NATIVE_MUTATIONS_COHERENT &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.174.4")
NATIVE_KLASS_CHILDREN =

leptris-ruby#246 klass-propagating reads: the read family (children/element_children/next_sibling/parent) mints the mapped subclass per kind, so children arrive already carrying the contract — wrap_native's is_a? guard short-circuits and the per-visit from() mint (the second allocation of the pair) drops out. Kind order is the C layer's node-type ints: element, text, comment, cdata, pi.

NATIVE_IDENTITY &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.193.2")
NATIVE_C_WALK = 
defined?(::Leptris::XML::NativeNode) &&
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.174.6")
PREFIXED_ATTR_PREDICATES_NATIVE =

leptris-ruby#103: prefixed attribute tests inside predicates stopped resolving through the document's in-scope declarations on released 1.9.37–1.9.39; 1.9.40 (engine 1.9.14+) restored the fallback. Older bindings keep the Ruby-engine routing in native_expression?.

Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.40")
LIBXML2_LAYOUT_PARITY =

leptris/leptris#636 (leptris-ruby 1.9.42): libxml2-compatible pretty-print — child-PI lines, DOCTYPE internal-subset layout, no stray trailing newline after non-ASCII text, and the indent unit (to_xml's indent_text takes the unit string). Older floor bindings treat indent_text as a display-form boolean, so the passthrough and the parity pins gate on this.

Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.42")
INDENT_UNIT_SUPPORTED =

leptris-ruby#109 (1.9.45): Element#to_xml takes the indent-unit string, so moxml's per-child document composition can carry indent_text: through. Text-bearing leaves still emit spaces until the engine fix (leptris/leptris#658); the boolean display form stays document-level and is never forwarded (the element face raises on it).

Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.45")
ELEMENT_UNIT_COMMENTS =

leptris-ruby#115 (fixed 1.9.50): the element unit path keeps child comments.

Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.50")
ENGINE_NOBLANKS_SAFE =

leptris/leptris#677: the engine's DROP_WS_TEXT trims boundary whitespace of non-blank text nodes. Probed at load rather than version-gated so the C fix is adopted the moment a fixed binding installs — no moxml release needed. While the probe fails, noblanks drops blanks moxml-side after parse.

begin
  doc = ::Leptris::XML::Document.parse(
    "<r> x</r>", options: ::Leptris::XML::ParseOptions.noblanks
  )
  text = doc.root.children.first
  text.is_a?(::Leptris::XML::Text) && text.content == " x"
rescue StandardError
  false
end
ENGINE_MULTI_DECL_SUBSET_OK =

leptris/leptris#687: the engine's subset serializer mangles every internal-subset declaration after the first. Probed for the same reason — once fixed, the whole-document fast path serves multi-declaration subsets too.

begin
  doc = ::Leptris::XML::Document.parse(
    %(<?xml version="1.0"?><!DOCTYPE r [<!ELEMENT r (#PCDATA)><!ATTLIST e a CDATA "d">]><r/>),
  )
  doc.to_xml.include?("<!ATTLIST")
rescue StandardError
  false
end
NATIVE_PLAN_ROWS =

Plan row stream (Moxml::Plan): the engine's one-pass C snapshot is pre-order with the first text child on the row — exactly the plan's shape, with no wrapper minting at all. Marker-bearing documents stay on the generic path (the bulk stream has no marker split).

true
NATIVE_PLAN_STRUCTS =

leptris-ruby#272 (binding 1.9.201.1): Native.plan_structs — the C struct executor behind Moxml::StructPlan. The floor is the varargs-mint fix: 1.9.197.1–1.9.201.0 seed unmapped struct members with garbage (GC aborts, corrupted data); StructPlan falls back to its spec-pinned Moxml::Plan path below the fix. The probe guards the version gate: a numerically newer lockstep can publish without the face (1.9.199.0 shipped without it), and the gate alone would NoMethodError.

Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.201.1") &&
        (!defined?(::Leptris::XML::Native) ||
::Leptris::XML::Native.respond_to?(:plan_structs))
NATIVE_PLAN_TYPED =

leptris-ruby#275 (binding 1.9.204, the remove half of the document-level surfaces): remove_pi, clear_declaration, remove_doctype complete the set-only creation entries. Attached DOCTYPEs materialize as native nodes, document-PI removal works, and declaration state mirrors through. The typed executor face (leptris-ruby: typed plan scalars — [slot, tag] spec entries cast in C, no Ruby String for numeric/boolean slots). Capability-probed, not version-gated.

!defined?(::Leptris::XML::Native) ||
::Leptris::XML::Native.respond_to?(:plan_structs_typed?)
NATIVE_DOC_PARTS = 
Gem::Version.new(::Leptris::VERSION) >= Gem::Version.new("1.9.204.0") &&
::Leptris::XML::Document.method_defined?(:remove_doctype) &&
::Leptris::XML::Document.method_defined?(:clear_declaration)
BLANK_TEXT_RE =

XML whitespace exactly — \v and \f are not XML space.

/\A[ \t\r\n]*\z/
VISIT_NODE_TYPES =

Walk-minted binding nodes carry the engine's kind int in replaces the class-case chain on the per-wrap hot path.

%i[element text comment cdata
processing_instruction doctype].freeze
NATIVE_XPATH_CACHE =

XPath prefers libleptris' native C engine (three orders of magnitude faster than the Ruby engine) for document-context queries, with a conservative gate: the Ruby engine handles element-context evaluation (native relative-context semantics are not contract-verified), variable references, and expressions whose results are attribute nodes (native returns those without name accessors). Both engines resolve expression prefixes against document-declared namespaces.

XPath::Cache.new(100)
NATIVE_GATE_CACHE =

The gate decision is expression-intrinsic; re-walking the cached AST three times per xpath call cost ~23% of repeated selective queries, so the boolean caches beside it.

XPath::Cache.new(100)
PARENT_AXIS_CACHE =

Root-context queries alone take the parent-axis guard; the AST walk is per-expression, so the verdict caches too.

XPath::Cache.new(100)

Constants included from Serialize

Serialize::ELEMENT_DEFAULT_KWARGS, Serialize::ELEMENT_EXPAND_KWARGS, Serialize::EMPTY_ELEMENT_RE, Serialize::EXPAND_EMPTY_NATIVE, Serialize::LITERAL_REGIONS, Serialize::RAW_AMP_GUARD_ACTIVE, Serialize::RAW_AMP_RE, Serialize::RAW_LT_GUARD_ACTIVE, Serialize::RAW_LT_RE, Serialize::RAW_LT_TRIGGER_RE, Serialize::TRAILING_NL_STRIP_ACTIVE

Constants included from DocumentParts

DocumentParts::DOCUMENT_ATTACHMENT_KEYS, DocumentParts::DOCUMENT_CHILD_PTRS

Constants included from Materialize

Materialize::EMPTY_FIELDS

Constants included from XmlUtils

XmlUtils::VALID_ELEMENT_NAMES

Class Attribute Summary collapse

Class Method Summary collapse

Methods included from Serialize

native_expand?, next_literal_region, normalize_markup, normalize_serialization, opener_at_offset, raw_serialize, serialize

Methods included from DocumentParts

add_document_child, assemble_document_children, default_declaration_xml, document_has_declaration?, fast_document_output, format_internal_subset, free_document, marker_text_for, markup_decl_end, mirror_declaration_native, native_doctype_xml, serialize_document

Methods included from Markers

entity_bearing?, split_entity_markers

Methods included from Materialize

bulk_materialize?, emit_element_fields, materialize_fields, walk_fields

Methods inherited from Base

bulk_materialize?, children_accepts_entity_flag?, create_cdata, create_comment, create_declaration, create_doctype, create_element, create_entity_reference, create_namespace, create_processing_instruction, create_text, decode_entities, entity_bearing?, free_document, in_scope_namespaces, materialize_fields, patch_node, patches_children?, preprocess_entities, restore_entities, sax_supported?, wrappers_recyclable?

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 Attribute Details

.serialize_generation ⇒ Object (readonly)

Returns the value of attribute serialize_generation.



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# File 'lib/moxml/adapter/leptris.rb', line 420

def serialize_generation
  @serialize_generation
end

Class Method Details

.actual_native(child_native, parent_native) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1501

def actual_native(child_native, parent_native)
  if NATIVE_DOC_PARTS && child_native.is_a?(CustomizedLeptris::Doctype) &&
      parent_native.is_a?(::Leptris::XML::Document)
    attached = attachments.get(parent_native, :doctype)
    return attached if attached.is_a?(::Leptris::XML::DocType)
  end
  child_native
end

.add_child(parent, child) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1510

def add_child(parent, child)
  if NATIVE_READ_LAYER && !(NATIVE_MUTATIONS_COHERENT &&
           parent.is_a?(::Leptris::XML::NativeNode) &&
           child.is_a?(::Leptris::XML::NativeNode))
    parent = to_binding(parent)
    child = to_binding(child)
  end
  case parent
  when ::Leptris::XML::Document then add_document_child(parent, child)
  else
    if child.is_a?(CustomizedLeptris::EntityReference)
      marker = parent.document.create_text_node("#{Entity::MARKER}#{child.name};")
      parent.add_child(marker)
      attachments.set(parent.document, :entity_markers, true)
      bump_serialize_generation
      return child
    end
    if NATIVE_MUTATIONS_COHERENT && parent.is_a?(NN) && child.is_a?(NN)
      doc = NN_DOCUMENT.bind_call(parent)
      child = doc.create_text_node(child) if child.is_a?(String)
      return NN_ADD_CHILD.bind_call(parent, child)
    end

    child = parent.document.create_text_node(child) if child.is_a?(String)
    parent.add_child(child)
  end
end

.add_next_sibling(node, new_node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1563

def add_next_sibling(node, new_node)
  if NATIVE_READ_LAYER
    node = to_binding(node)
    new_node = to_binding(new_node)
  end
  return node.add_next_sibling(new_node) if node.is_a?(::Leptris::XML::Element)

  # Non-element receivers (Text/Comment/CDATA): the binding's
  # method is Element-only, but the C insert anchors on any
  # node — route through the FFI entry directly, keeping the
  # binding's namespace-lift adoption for element inserts
  # (issue #245).
  adopt_for_sibling_insert(new_node, node)
  ::Leptris::XML::FFI.check_status(
    ::Leptris::XML::FFI.leptris_element_insert_after(
      node.c_ptr, new_node.c_ptr
    ),
  )
  new_node
end

.add_previous_sibling(node, new_node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1538

def add_previous_sibling(node, new_node)
  if NATIVE_READ_LAYER
    node = to_binding(node)
    new_node = to_binding(new_node)
  end
  # A PI inserted before the root lives at document level in
  # libleptris's model, not in the element tree.
  if new_node.is_a?(::Leptris::XML::ProcessingInstruction) &&
      node.document&.root == node
    node.document.add_pi(new_node.target, new_node.content.to_s)
    return new_node
  end
  return node.add_previous_sibling(new_node) if node.is_a?(::Leptris::XML::Element)

  # Non-element receivers: raw-FFI anchor (issue #245, same
  # shape as add_next_sibling).
  adopt_for_sibling_insert(new_node, node)
  ::Leptris::XML::FFI.check_status(
    ::Leptris::XML::FFI.leptris_element_insert_before(
      node.c_ptr, new_node.c_ptr
    ),
  )
  new_node
end

.adopt_for_sibling_insert(new_node, anchor) ⇒ Object

The binding's add_*_ sibling methods lift an adopted element's namespace declarations into the target scope; the raw-FFI path above must preserve that.



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# File 'lib/moxml/adapter/leptris.rb', line 1587

def adopt_for_sibling_insert(new_node, anchor)
  return unless new_node.is_a?(::Leptris::XML::Element)
  return if ::Leptris::XML::Element.skip_adoption_lift?(new_node)

  scope = anchor.parent.is_a?(::Leptris::XML::Element) ? anchor.parent.namespaces : {}
  ::Leptris::XML::Element.lift_namespaces_for_adoption(new_node, scope)
end

.ast_contains_type?(ast, type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1952

def ast_contains_type?(ast, type)
  return true if ast.type == type

  ast.children.any? do |child|
    child.is_a?(XPath::AST::Node) && ast_contains_type?(child, type)
  end
end

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



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# File 'lib/moxml/adapter/leptris.rb', line 1808

def at_xpath(node, expression, namespaces = {})
  native = native_xpath(node, expression, namespaces, first_only: true)
  return native unless native.nil?

  result = engine_xpath(node, expression, namespaces)
  result.is_a?(Array) ? result.first : result
end

.attachments ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 590

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

.attr_matches?(attr_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 914

def attr_matches?(attr_name)
  %w[version encoding standalone].include?(attr_name.to_s)
end

.attribute_element(attr) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1449

def attribute_element(attr)
  attr.element
end

.attribute_name(attr) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1453

def attribute_name(attr)
  # leptris Attr names are qualified; the wrapper composes the
  # prefix, so expose the local part.
  return attr.name.split(":", 2)[1] if attr.name.include?(":")

  attr.name.to_s.dup.force_encoding("UTF-8")
end

.attribute_pairs(element) ⇒ Object

One C crossing per element on bindings with the bulk face (leptris-ruby#278): interned names, fresh values, zero Attr objects. Face-probed, not version-gated — the floor (1.9.194.1) admits bindings without it, which take the base default over #attributes.



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# File 'lib/moxml/adapter/leptris.rb', line 1442

def attribute_pairs(element)
  binding_element = to_binding(element)
  return super unless binding_element.respond_to?(:attribute_pairs)

  binding_element.attribute_pairs
end

.attributes(element) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1432

def attributes(element)
  element = to_binding(element)
  element.attribute_nodes
end

.bare_attr_value(element, name) ⇒ Object

Fast bare-name read: the binding call plus marker restoration when the document carries them (entity-free documents — the common case — skip the scan; parentless iterparse elements are never bearing). Raw qualified-name read; the entity-restore decision is the wrapper's (Element#[] rides its generation memo — the document-plus-attachment probe here cost more than the read itself).



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# File 'lib/moxml/adapter/leptris.rb', line 641

def bare_attr_value(element, name)
  # Exact-name C read: bare names target no-namespace
  # attributes (the documented contract — a bare "y" never
  # resolves a "p:y" sibling).
  value = if NATIVE_READ_LAYER && element.is_a?(NN)
            NN_ATTRIBUTE.bind_call(element, name.to_s)
          else
            element[name.to_s]
          end
  if !NATIVE_STRINGS_UTF8 && NATIVE_READ_LAYER &&
      element.is_a?(::Leptris::XML::NativeNode) &&
      value.is_a?(String)
    return value.dup.force_encoding(Encoding::UTF_8)
  end

  value
end

.bare_get_qname_safe? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 602

def bare_get_qname_safe?
  true
end

.bare_set_qname_safe? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 598

def bare_set_qname_safe?
  true
end

.bulk_binding_children(node) ⇒ Object

The binding-node twin of bulk_native_children (identity via the binding's wrap cache).



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# File 'lib/moxml/adapter/leptris.rb', line 1303

def bulk_binding_children(node)
  copied, pointers = bulk_child_buffers(node.c_ptr)
  return node.children.to_a if copied.zero?

  doc = node.document
  Array.new(copied) do |i|
    ::Leptris::XML::Node.wrap(pointers.get_pointer(i * 8), doc)
  end
end

.bulk_child_buffers(ptr) ⇒ Object

Shared count-then-copy fetch over moxml's grow-to-fit thread-local scratch — the layer above the binding's (buggy on 1.9.163.x) own buffers. Returns [copied, pointers].



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# File 'lib/moxml/adapter/leptris.rb', line 1344

def bulk_child_buffers(ptr)
  total = ::Leptris::XML::FFI.leptris_node_children_ex(ptr, nil, nil, 0)
  return [0, nil] if total.zero?

  scratch = (Thread.current[:moxml_leptris_children] ||= {})
  pointers = scratch[:pointers]
  if pointers.nil? || pointers.size / 8 < total
    pointers&.free
    pointers = scratch[:pointers] =
      ::FFI::MemoryPointer.new(:pointer, total)
  end
  kinds = scratch[:kinds]
  if kinds.nil? || kinds.size / 4 < total
    kinds&.free
    kinds = scratch[:kinds] = ::FFI::MemoryPointer.new(:int, total)
  end
  copied = ::Leptris::XML::FFI.leptris_node_children_ex(
    ptr, pointers, kinds, total
  )
  [copied, pointers]
end

.bulk_native_children(node) ⇒ Object

Bulk child fetch with moxml's own grow-to-fit thread-local scratch: count first (exact), size the buffers to it, wrap each pointer as a native-layer node. Correct on every binding version — the binding's own scratch truncates at 512 on 1.9.163.x (leptris-ruby#202).



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# File 'lib/moxml/adapter/leptris.rb', line 1318

def bulk_native_children(node)
  copied, pointers = bulk_child_buffers(::FFI::Pointer.new(node.address))
  return [] if copied.zero?

  doc = doc_for(node)
  if doc.nil?
    # Unregistered native (adapter-level use outside #root):
    # the 163.2 binding's bulk needs a document, so walk
    # siblings instead of crashing through a doc-less wrap.
    return sibling_walk_children(node)
  end

  # Share the layer's per-document identity cache (keyed by
  # node address): NativeNode.from alone mints fresh objects
  # per call on 1.9.163.x, which would fork moxml wrappers.
  cache = doc.native_cache
  Array.new(copied) do |i|
    child_ptr = pointers.get_pointer(i * 8)
    cache[child_ptr.address] ||=
      ::Leptris::XML::NativeNode.from(doc, child_ptr)
  end
end

.bump_serialize_generation ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 424

def self.bump_serialize_generation
  @serialize_generation += 1
end

.canonical_native(doc, node) ⇒ Object

Native twin for a binding node through the document's address-keyed native cache — minting on miss so every accessor converges on one native per node (issue #219). Binding natives (Attribute/Attr, synthetic wrappers) and docless nodes pass through unchanged.



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# File 'lib/moxml/adapter/leptris.rb', line 1293

def canonical_native(doc, node)
  return node unless node.is_a?(::Leptris::XML::Element)

  cache = doc.native_cache
  cache[node.c_ptr.address] ||=
    ::Leptris::XML::NativeNode.from(doc, node.c_ptr)
end

.cdata_content(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1718

def cdata_content(node)
  return NN_CONTENT.bind_call(node) if NATIVE_READ_LAYER && node.is_a?(NN)

  node.content
end

.children(node, entity_bearing: false) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1167

def children(node, entity_bearing: false)
  # NATIVE_READ_LAYER gates the whole keep-path: it consults
  # NN_DOCUMENT (defined only with the native layer), and
  # native-less installs answer through the binding case
  # branch below, whose children already carry first-class
  # EntityReference nodes (issue #240).
  if NATIVE_READ_LAYER && NATIVE_ENTITY_REFS &&
      native_keep_entity_refs?(node)
    return to_binding(node).children.to_a
  end

  if NATIVE_READ_LAYER && node.is_a?(::Leptris::XML::NativeNode)
    # Bulk C children through moxml's own scratch (see
    # NATIVE_READ_LAYER note above). Entity-marker documents
    # bridge each child for the marker split — the
    # TextSegment reconstruction reads binding text nodes;
    # the wrapper's memo supplies the flag, so deriving it
    # here costs no C parent climb per call.
    natives = if NATIVE_BULK_FIXED
                NN_CHILDREN.bind_call(node).to_a
              else
                bulk_native_children(node)
              end
    return natives unless entity_bearing

    # Entity-marker documents: bridge for the marker split
    # (TextSegment reconstruction reads binding text nodes).
    doc = doc_for(node)
    bound_children = natives.map { |child| to_binding(child) }
    if doc && attachments.get(doc, :entity_markers) == false
      return bound_children
    end

    return split_entity_markers(bound_children, to_binding(node))
  end
  # Frequency-ordered: elements dominate every walk and paid
  # ten failed compares to reach the else arm.
  case node
  when ::Leptris::XML::Element
    natives = node.children.to_a
    if NATIVE_READ_LAYER && natives.size == 512
      # Binding scratch truncation (leptris-ruby#202): a
      # full batch is ambiguous — refetch through moxml's
      # own buffers to be sure.
      natives = bulk_binding_children(node)
    end
    # Parse records whether the preprocessed source held any
    # entity markers, and the ER builder path flips the flag
    # when it mints one. A false flag lets traversal skip the
    # marker split — including the per-text content fetch that
    # dominates cold children cost. Cross-document moves of
    # marker-bearing text into an entity-free document degrade
    # to literal text.
    return natives if node.document.nil? ||
      attachments.get(node.document, :entity_markers) == false

    split_entity_markers(natives, node)
  when ::Leptris::XML::Document
    assemble_document_children(node)
  when CustomizedLeptris::Declaration, CustomizedLeptris::Doctype,
       CustomizedLeptris::EntityReference, CustomizedLeptris::TextSegment,
       CustomizedLeptris::DocumentPI,
       # Terminal node kinds pay an FFI round trip for an empty
       # list; unfiltered recursions visit every text node.
       ::Leptris::XML::Text, ::Leptris::XML::Comment,
       ::Leptris::XML::CDATA, ::Leptris::XML::ProcessingInstruction,
       ::Leptris::XML::Attr
    []
  else
    node.children.to_a
  end
end

.comment_content(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1729

def comment_content(node)
  return NN_CONTENT.bind_call(node) if NATIVE_READ_LAYER && node.is_a?(NN)

  node.content
end

.contains_parent_axis?(ast) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1921

def contains_parent_axis?(ast)
  return true if ast.type == :parent
  return true if ast.type == :axis && ast.children.first == "parent"

  ast.children.any? do |child|
    child.is_a?(XPath::AST::Node) && contains_parent_axis?(child)
  end
end

.create_document(_native_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 845

def create_document(_native_doc = nil)
  ::Leptris::XML::Document.create
end

.create_native_cdata(content, owner_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 870

def create_native_cdata(content, owner_doc = nil)
  (owner_doc || create_document).create_cdata(content)
end

.create_native_comment(content, owner_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 874

def create_native_comment(content, owner_doc = nil)
  (owner_doc || create_document).create_comment(content)
end

.create_native_declaration(version, encoding, standalone) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 887

def create_native_declaration(version, encoding, standalone)
  CustomizedLeptris::Declaration.new(version, encoding, standalone)
end

.create_native_doctype(name, external_id, system_id) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 883

def create_native_doctype(name, external_id, system_id)
  CustomizedLeptris::Doctype.new(name, external_id, system_id)
end

.create_native_element(name, owner_doc = nil) ⇒ Object

Native builder factories: one C call and a TypedData wrap. Adopted from 1.9.163.5, where native mutations became version-coherent (leptris-ruby#204/#208) — the earlier rejection (stale binding memos + per-attach bridge cost) no longer applies: add_child carries a native fast path.



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# File 'lib/moxml/adapter/leptris.rb', line 854

def create_native_element(name, owner_doc = nil)
  if NATIVE_MUTATIONS_COHERENT && owner_doc
    return owner_doc.native_create_element(name.to_s)
  end

  (owner_doc || create_document).create_element(name.to_s)
end

.create_native_entity_reference(name, owner_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 891

def create_native_entity_reference(name, owner_doc = nil)
  if NATIVE_ENTITY_REFS && owner_doc
    return owner_doc.create_entity_reference(name.to_s)
  end

  CustomizedLeptris::EntityReference.new(name)
end

.create_native_namespace(element, prefix, uri) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 934

def create_native_namespace(element, prefix, uri)
  element = to_binding(element) if NATIVE_READ_LAYER
  element.add_namespace_definition(prefix, uri)
end

.create_native_processing_instruction(target, content) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 878

def create_native_processing_instruction(target, content)
  doc = create_document
  doc.create_processing_instruction(target.to_s, content.to_s)
end

.create_native_text(content, owner_doc = nil) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 862

def create_native_text(content, owner_doc = nil)
  if NATIVE_MUTATIONS_COHERENT && owner_doc
    return owner_doc.native_create_text(content)
  end

  (owner_doc || create_document).create_text_node(content)
end

.declaration_attribute(declaration, attr_name) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 906

def declaration_attribute(declaration, attr_name)
  declaration.public_send(attr_name) if attr_matches?(attr_name)
end

.digest(node, drop_ws_text: false) ⇒ Object

Subtree digest over the binding node (issue #173). Only binding Nodes carry a C node handle: the synthetic wrappers (declarations, doctypes, entity markers) and the lightweight Attr triples answer nil.



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# File 'lib/moxml/adapter/leptris.rb', line 1115

def digest(node, drop_ws_text: false)
  return nil unless DIGEST_SUPPORTED
  if NATIVE_READ_LAYER && node.is_a?(::Leptris::XML::NativeNode)
    return to_binding(node).digest(drop_ws: drop_ws_text)
  end
  return nil unless node.is_a?(::Leptris::XML::Node) &&
    !node.is_a?(::Leptris::XML::ResultAttr)

  node.digest(drop_ws: drop_ws_text)
end

.doc_for(node) ⇒ Object

Binding document for a NativeNode subtree: climb parents to the root (C-bound reads) and look the doc up in the root registry. Detached subtrees answer nil.



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# File 'lib/moxml/adapter/leptris.rb', line 367

def doc_for(node)
  # The 1.9.163.5 native layer exposes the owning document
  # directly; the root climb serves older bindings.
  return NN_DOCUMENT.bind_call(node) if NATIVE_MUTATIONS_COHERENT

  current = node
  current = current.parent while current&.parent
  @native_doc_roots[current]
end

.doctype_external_id(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1775

def doctype_external_id(node)
  node.is_a?(CustomizedLeptris::Doctype) ? node.external_id : node.public_id
end

.doctype_name(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1771

def doctype_name(node)
  node.is_a?(CustomizedLeptris::Doctype) ? node.name : node.root_name
end

.doctype_system_id(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1779

def doctype_system_id(node)
  node.system_id
end

.document(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1388

def document(node)
  return doc_for(node) if NATIVE_READ_LAYER &&
    node.is_a?(::Leptris::XML::NativeNode)

  case node
  when ::Leptris::XML::Document then node
  when CustomizedLeptris::Declaration, CustomizedLeptris::Doctype then node.parent_doc
  else node.document
  end
end

.duplicate_node(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1151

def duplicate_node(node)
  node = to_binding(node) if NATIVE_READ_LAYER
  case node
  when CustomizedLeptris::Declaration
    CustomizedLeptris::Declaration.new(node.version, node.encoding, node.standalone)
  when CustomizedLeptris::Doctype
    CustomizedLeptris::Doctype.new(node.name, node.external_id, node.system_id)
  when CustomizedLeptris::EntityReference
    CustomizedLeptris::EntityReference.new(node.name)
  when CustomizedLeptris::DocumentPI
    CustomizedLeptris::DocumentPI.new(node.target, node.data, node.parent_doc)
  else
    node.dup
  end
end

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



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# File 'lib/moxml/adapter/leptris.rb', line 2003

def engine_xpath(node, expression, namespaces = {})
  unless node.is_a?(Moxml::Node)
    node = Moxml::Node.wrap(node, Context.new(:leptris))
  end

  ast = XPath::Parser.parse(expression)
  proc = XPath::Compiler.compile_with_cache(ast, namespaces: namespaces)
  result = proc.call(node)

  case result
  when Array, NodeSet
    nodes = result.is_a?(NodeSet) ? result.to_a : result
    seen = {}.compare_by_identity
    nodes.map { |n| n.is_a?(Moxml::Node) ? n.native : n }
      .select do |native|
        if seen.key?(native)
          false
        else
          seen[native] = true
          true
        end
      end
  else
    result
  end
end

.entity_reference_name(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 899

def entity_reference_name(node)
  return node.name if NATIVE_ENTITY_REFS &&
    node.is_a?(::Leptris::XML::EntityReference)

  node.name if node.is_a?(CustomizedLeptris::EntityReference)
end

.expanded_attr_reads? ⇒ Boolean

Expanded-name (URI + local) attribute VALUE lookup on the engine — the same match rule as the resolver (xmlns declarations invisible, no-namespace never matches a prefixed name), without materializing the attribute list.

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 610

def expanded_attr_reads?
  true
end

.expanded_attr_value(element, uri, local) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 623

def expanded_attr_value(element, uri, local)
  # Bridge first: identity-mode wrappers hand a NativeNode
  # (no attribute_ns); binding elements pass through as-is.
  # The class-receiver is_a? this method replaced was always
  # false — element.adapter IS the adapter class — so the
  # branch sat dead since identity mode and the binding-only
  # assumption went unnoticed (issue #242).
  to_binding(element).attribute_ns(uri, local)
end

.expression_uses_parent_axis?(expression) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1914

def expression_uses_parent_axis?(expression)
  ast = XPath::Parser.parse_with_cache(expression)
  contains_parent_axis?(ast)
rescue XPath::SyntaxError
  true
end

.get_attribute(element, name) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1481

def get_attribute(element, name)
  element = to_binding(element)
  element.attribute_nodes.find { |attr| attr.name == name.to_s }
end

.get_attribute_value(element, name) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1486

def get_attribute_value(element, name)
  element = to_binding(element)
  element[name.to_s]
end

.has_declaration?(native_doc, _wrapper) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 919

def has_declaration?(native_doc, _wrapper)
  return true if attachments.get(native_doc, :declaration)

  attachments.key?(native_doc, :had_source_declaration) &&
    attachments.get(native_doc, :had_source_declaration)
end

.inner_text(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1693

def inner_text(node)
  node = to_binding(node) if NATIVE_READ_LAYER
  # moxml semantic: direct text children only — no descendant
  # text (that is #text), no comments. Entity references
  # contribute their serialized form.
  children(node).filter_map do |child|
    case child
    when CustomizedLeptris::EntityReference then "&#{child.name};"
    when ::Leptris::XML::CDATA then child.content
    when ::Leptris::XML::Text, CustomizedLeptris::TextSegment
      child.content.to_s.dup.force_encoding("UTF-8")
    end
  end.join
end

.iterparse(xml, mode = :top_level, _context = nil, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/moxml/adapter/leptris.rb', line 756

def iterparse(xml, mode = :top_level, _context = nil, &block)
  raise ArgumentError, "iterparse requires a block" unless block

  ctx = _context || Context.new(:leptris)
  ::Leptris::XML::Iterparse.parse(xml, mode: mode) do |element|
    yield(Node.wrap(element, ctx))
  end
end

.iterparse_file(path, mode = :top_level, _context = nil, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/moxml/adapter/leptris.rb', line 765

def iterparse_file(path, mode = :top_level, _context = nil, &block)
  raise ArgumentError, "iterparse_file requires a block" unless block

  ctx = _context || Context.new(:leptris)
  ::Leptris::XML::Iterparse.parse_file(path, mode: mode) do |element|
    yield(Node.wrap(element, ctx))
  end
end

.line_number(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1420

def line_number(node)
  if NATIVE_MUTATIONS_COHERENT &&
      node.is_a?(::Leptris::XML::NativeNode)
    line = node.line
    return line.nil? || line.zero? ? nil : line
  end
  return nil unless node.is_a?(::Leptris::XML::Node)

  line = node.line
  line.zero? ? nil : line
end

.namespace(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1010

def namespace(node)
  node = to_binding(node) if NATIVE_READ_LAYER

  # The binding resolves Attr#namespace to the declaration but
  # without the prefix; when the qualified name carries one,
  # prefer the in-scope declaration that binds it so wrappers
  # keep prefix and uri.
  if node.is_a?(::Leptris::XML::Attr) &&
      (prefix = node.prefix || prefix_part(node.name))
    resolved = resolve_prefix_ns(node.element, prefix)
    return resolved if resolved
  end

  ns = node.namespace
  return ns unless ns.nil?

  # Set-side namespaces (created attributes, renamed elements)
  # carry a prefix the native resolver did not bind; resolve
  # through the scope chain so wrapper-level access stays
  # XML-correct.
  owner = node.is_a?(::Leptris::XML::Attr) ? node.element : node
  prefix = if node.is_a?(::Leptris::XML::Attr)
             node.prefix || prefix_part(node.name)
           else
             prefix_part(node.name)
           end
  return nil if prefix.nil?

  resolve_prefix_ns(owner, prefix)
end

.namespace_definitions(element) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1766

def namespace_definitions(element)
  element = to_binding(element) if NATIVE_READ_LAYER
  element.namespace_definitions
end

.namespace_prefix(namespace) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1751

def namespace_prefix(namespace)
  # Attr#namespace is the bare URI string in leptris 1.9+ (the
  # C model: a namespace handle IS the URI); attributes carry
  # their prefix on the Attr itself.
  return nil if namespace.is_a?(String)

  namespace.prefix
end

.namespace_uri(namespace) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1760

def namespace_uri(namespace)
  return namespace if namespace.is_a?(String)

  namespace.href
end

.native_c14n_byte_safe? ⇒ Boolean

Native C14N delegation probe: the engine's C14N must byte-match the Ruby reference (ported from canon) on a namespace-sorting + attributes + comments shape before Moxml::C14n hands the default path to it. The engine currently emits namespace declarations in document order instead of lexicographic (filed leptris/leptris#881); the probe auto-adopts the native path once a fixed build lands — no moxml release needed. Lazy, not load-time: the probe exercises the wrapper layer (Document/serialize/C14n), which is circular while THIS adapter file is still loading — the load-time form rescued to false on every build and masked a landed engine fix.

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 396

def self.native_c14n_byte_safe?
  return @native_c14n_byte_safe unless @native_c14n_byte_safe.nil?

  @native_c14n_byte_safe = begin
    probe_xml = %(<?xml version="1.0"?><doc xmlns:p="urn:p" xmlns="urn:d" b="2" a="1"><e p:x="v" z="w">t &amp; u</e><!-- c --></doc>)
    native_doc = ::Leptris::XML::Document.parse(probe_xml)
    native = native_doc.root.canonicalize(
      ::Leptris::XML::FFI::C14N_1_0, nil,
      mode: ::Leptris::XML::FFI::C14N_MODE_CANONICAL
    )
    wrapper = Moxml::Wrappers::Document.new(native_doc, Moxml::Context.new(:leptris))
    reference = Moxml::C14n::Inclusive10.new.canonicalize(wrapper.root)
    native == reference
  rescue StandardError
    false
  end
end

.native_context_node?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1905

def native_context_node?(node)
  # Parentless elements (iterparse yields) have no document
  # handle for the compiled eval — the Ruby engine owns them.
  return false if node.is_a?(::Leptris::XML::Element) && node.document.nil?

  node.is_a?(::Leptris::XML::Document) ||
    node.is_a?(::Leptris::XML::Element)
end

.native_expression?(expression) ⇒ Boolean

Document-context queries without variable references, attribute-node results, or the nokogiri-compat xmlns: reserved prefix convention.

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1933

def native_expression?(expression)
  NATIVE_GATE_CACHE.get_or_set(expression) do
    ast = XPath::Parser.parse_with_cache(expression)
    next false if ast_contains_type?(ast, :variable)
    next false if uses_xmlns_prefix?(ast)
    next false if !PREFIXED_ATTR_PREDICATES_NATIVE && prefixed_attribute_test?(ast)

    # Attribute-node results are native since 1.9.105
    # (leptris-ruby#153: ResultAttr wrappers with name/value);
    # older bindings returned generic Node wrappers whose
    # #name raised, so the Ruby engine owned them.
    next true if selects_attribute_results?(ast) && ATTR_RESULT_NATIVE

    !selects_attribute_results?(ast)
  end
rescue XPath::SyntaxError
  false
end

.native_identity_stable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 659

def native_identity_stable?
  true
end

.native_inclusive10(native) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 614

def native_inclusive10(native)
  return nil unless native_c14n_byte_safe?

  to_binding(native).canonicalize(
    ::Leptris::XML::FFI::C14N_1_0, nil,
    mode: ::Leptris::XML::FFI::C14N_MODE_CANONICAL
  )
end

.native_keep_entity_refs?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1240

def native_keep_entity_refs?(node)
  return false unless NATIVE_READ_LAYER &&
    node.is_a?(::Leptris::XML::NativeNode)

  doc = NN_DOCUMENT.bind_call(node)
  attachments.get(doc, :keep_entity_refs) == true
end

.native_xpath(node, expression, namespaces, first_only: false) ⇒ Array, ...

Returns native results, or nil when the query must run on the Ruby engine.

Returns:

  • (Array, Object, nil) —

    native results, or nil when the query must run on the Ruby engine



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# File 'lib/moxml/adapter/leptris.rb', line 1818

def native_xpath(node, expression, namespaces, first_only: false)
  # Canonical natives (the #219 unification) are bare TypedData
  # wrappers — no Searchable methods, no document handle for
  # the gates below. The memoized bridge recovers the binding
  # identity; without it every element-context query fell to
  # the Ruby engine (a silent native-path loss since #219).
  if NATIVE_READ_LAYER && node.is_a?(::Leptris::XML::NativeNode)
    node = to_binding(node)
  end
  return nil unless native_context_node?(node)
  return nil unless native_expression?(expression)
  # The binding reports the root element parentless while moxml
  # roots it at the document, so parent-axis queries from the
  # root element keep the Ruby engine.
  if node.is_a?(::Leptris::XML::Element) &&
      node.document&.root.equal?(node) &&
      PARENT_AXIS_CACHE.get_or_set(expression) do
        expression_uses_parent_axis?(expression)
      end
    return nil
  end

  compiled = NATIVE_XPATH_CACHE.get_or_set(expression) do
    ::Leptris::XML::XPath.compile(expression)
  end
  document = node.is_a?(::Leptris::XML::Document) ? node : node.document

  if namespaces && !namespaces.empty?
    # Namespace-bound evaluation has no raw-pointer entry —
    # Searchable resolves the ns set for both result shapes.
    result = if first_only
               node.at_xpath(expression, namespaces)
             else
               compiled.eval(node, namespaces)
             end
    return case result
           when ::Leptris::XML::NodeSet
             first_only ? result.first : result.extend(Moxml::LazyNodeSet)
           else
             result
           end
  end

  unless NATIVE_XPATH_SEAMS
    result = compiled.eval(node)
    return case result
           when ::Leptris::XML::NodeSet
             first_only ? result.first : result.extend(Moxml::LazyNodeSet)
           else
             result
           end
  end

  # eval_ptrs against raw pointers — the per-call
  # EvaluationContext that #eval builds costs ~2us of Ruby
  # on every query (leptris-ruby TODO.perf/15).
  doc_ptr = node.is_a?(::Leptris::XML::Document) ? node.c_ptr : document.c_ptr
  context_ptr = node.is_a?(::Leptris::XML::Document) ? nil : node.c_ptr
  result_ptr = compiled.eval_ptrs(doc_ptr, context_ptr)
  return nil if result_ptr.null?

  if first_only
    # The single-result seam: nodeset entry 0 materializes
    # and frees in one C dispatch — no NodeSet container, no
    # AutoPointer (leptris-ruby TODO.perf/16). The module
    # object back means a scalar, whose wrap (and free)
    # stays with wrap_xpath_first_result.
    return ::Leptris::XML::Searchable.wrap_xpath_first_result(
      document, result_ptr
    )
  end

  # The binding's #to_a mints one Ruby wrapper per result
  # node; hand the native set through so .size/.first stay
  # native-side (LazyNodeSet holds it unmaterialized).
  # Scalars pass through unwrapped-and-unextended.
  result = ::Leptris::XML::Searchable.wrap_xpath_result(
    document, result_ptr
  )
  result.is_a?(::Leptris::XML::NodeSet) ? result.extend(Moxml::LazyNodeSet) : result
rescue ::Leptris::XML::XPathError
  # Not supported by the native engine — the Ruby engine is a
  # full XPath 1.0 implementation, including Moxml's syntax
  # errors for invalid expressions.
  nil
end

.next_sibling(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1372

def next_sibling(node)
  return NN_NEXT_SIBLING.bind_call(node) if NATIVE_READ_LAYER &&
    node.is_a?(::Leptris::XML::NativeNode)

  node.next_sibling if node.is_a?(::Leptris::XML::Node)
end

.node_name(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1126

def node_name(node)
  return node.root_name if node.is_a?(::Leptris::XML::DocType)
  return node.target if node.is_a?(CustomizedLeptris::DocumentPI)

  if NATIVE_READ_LAYER && node.is_a?(::Leptris::XML::NativeNode)
    # PIs expose no name through the native layer.
    return to_binding(node).target.to_s if NN_NODE_TYPE.bind_call(node) == :pi

    name = NN_NAME.bind_call(node)
    return name if NATIVE_STRINGS_UTF8

    name.dup.force_encoding(Encoding::UTF_8)
  end

  node.name.to_s.dup.force_encoding("UTF-8")
end

.node_type(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1071

def node_type(node)
  if node.is_a?(::Leptris::XML::Node) &&
      node.instance_variable_defined?(:@node_type)
    kind = node.instance_variable_get(:@node_type)
    if kind.is_a?(Integer)
      mapped = VISIT_NODE_TYPES[kind]
      return mapped if mapped
    end
  end

  if NATIVE_READ_LAYER &&
      node.is_a?(::Leptris::XML::NativeNode)
    type = NN_NODE_TYPE.bind_call(node)
    # The native layer spells PIs :pi; the wrapper contract
    # (node_type_map) says :processing_instruction.
    return :processing_instruction if type == :pi

    return type
  end

  # Frequency-ordered: elements and text dominate every real
  # document, and Node.wrap dispatches here once per cold
  # wrap. CDATA must precede Text (CDATA < Text in the
  # binding).
  case node
  when ::Leptris::XML::Element then :element
  when ::Leptris::XML::CDATA then :cdata
  when ::Leptris::XML::Text, CustomizedLeptris::TextSegment then :text
  when ::Leptris::XML::Attr, ::Leptris::XML::ResultAttr then :attribute
  when ::Leptris::XML::Comment then :comment
  when ::Leptris::XML::ProcessingInstruction, CustomizedLeptris::DocumentPI then :processing_instruction
  when ::Leptris::XML::Document then :document
  when ::Leptris::XML::DocType, CustomizedLeptris::Doctype then :doctype
  when CustomizedLeptris::Declaration then :declaration
  when CustomizedLeptris::EntityReference then :entity_reference
  when ::Leptris::XML::EntityReference then :entity_reference if NATIVE_ENTITY_REFS
  else :unknown
  end
end

.parent(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1248

def parent(node)
  if NATIVE_READ_LAYER && node.is_a?(::Leptris::XML::NativeNode)
    parent = NN_PARENT.bind_call(node)
    return parent if parent

    doc = doc_for(node)
    return doc if doc&.root && doc.root.c_ptr.address == node.address

    return nil
  end

  # Frequency-ordered: elements dominate navigation and paid
  # three failed compares to reach the else arm.
  case node
  when ::Leptris::XML::Element then root_parent(node)
  when ::Leptris::XML::Document then nil
  when CustomizedLeptris::Declaration, CustomizedLeptris::Doctype,
       CustomizedLeptris::DocumentPI then node.parent_doc
  when CustomizedLeptris::TextSegment, CustomizedLeptris::EntityReference then node.parent
  # Same body as the Element arm by design (frequency
  # ordering); the generic kinds are cold.
  else root_parent(node) # rubocop:disable Lint/DuplicateBranch
  end
end

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



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# File 'lib/moxml/adapter/leptris.rb', line 663

def parse(xml, options = {}, _context = nil)
  xml_string = xml.is_a?(IO) || xml.is_a?(StringIO) ? xml.read : xml.to_s
  # The marker flag rides preprocess's own `&` scan — no
  # second full-buffer probe (issue #132 parse-side note).
  entity_mode_keep =
    NATIVE_ENTITY_REFS &&
    (_context&.config&.entity_mode == :keep || options[:keep_entity_refs] == true)
  processed, entity_markers =
    if entity_mode_keep
      [xml_string, false]
    else
      Entity.preprocess_with_marker_flag(xml_string)
    end

  # readonly: true (issue #133): the binding memoizes reads and
  # refuses mutations — the parse-and-read lifecycle for
  # multi-pass consumers (comparison, diff, signature).
  # dtdattr: true opts into DTD ATTLIST default materialization
  # (off by default since libleptris 1.9.8, matching libxml2).
  native_doc = begin
    ::Leptris::XML::Document.parse(
      processed,
      readonly: options[:readonly] == true,
      options: parse_flags(options, context: _context),
    )
  rescue ::Leptris::XML::ParseError => e
    # libleptris has no recovery mode that survives unclosed
    # tags; non-strict callers get an empty document, matching
    # the Libxml adapter's non-strict behavior. The fatal
    # error rides the document as parse diagnostics (issue
    # #147) — otherwise nothing says why it came back empty.
    raise Moxml::ParseError.new(e.message) if options[:strict]

    recover_errors = [e.message]
    create_document
  end
  ctx = _context || Context.new(:leptris)
  doc = Wrappers::Document.new(native_doc, ctx)

  if options[:noblanks] && !ENGINE_NOBLANKS_SAFE
    # The engine's DROP_WS_TEXT trims boundary whitespace of
    # NON-blank text nodes at parse (leptris/leptris#677), so
    # the flag is not forwarded — blanks drop here instead.
    if options[:readonly] == true
      raise ArgumentError,
            "noblanks: true requires a mutable document (readonly: true freezes the tree at parse)"
    end

    strip_blank_text_nodes!(native_doc)
  end

  record_source_declaration(native_doc, processed)
  attachments.set(native_doc, :entity_markers, entity_markers)
  attachments.set(native_doc, :keep_entity_refs, entity_mode_keep)
  bump_serialize_generation
  attachments.set(native_doc, :parse_errors, recover_errors) if recover_errors

  doc
end

.parse_errors(native_doc) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 841

def parse_errors(native_doc)
  attachments.get(native_doc, :parse_errors) || NO_PARSE_ERRORS
end

.parse_flags(options, context: nil) ⇒ Object

nil when no parse flag is requested — the binding treats a nil options hash as plain defaults (matching libxml2/ Nokogiri semantics: blanks kept, no ATTLIST defaults). noblanks forwards only once the engine flag is libxml2-safe (see ENGINE_NOBLANKS_SAFE); otherwise it is moxml-side.



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# File 'lib/moxml/adapter/leptris.rb', line 791

def parse_flags(options, context: nil)
  flags = 0
  flags |= ::Leptris::XML::ParseOptions::DTDATTR if options[:dtdattr] == true
  flags |= ::Leptris::XML::ParseOptions::KEEP_ENTITY_REFS if NATIVE_ENTITY_REFS &&
    (context&.config&.entity_mode == :keep ||
     options[:keep_entity_refs] == true)
  flags |= ::Leptris::XML::ParseOptions::NOBLANKS if options[:noblanks] == true && ENGINE_NOBLANKS_SAFE
  flags.zero? ? nil : ::Leptris::XML::ParseOptions.new(flags)
end

.parse_fragment(xml, _context = nil) ⇒ Object

Tolerant HTML4/5 parsing into the standard DOM (engine leptris/leptris#659): implied end tags, void elements, raw-text script/style, case-insensitive lowercased names, the HTML named-entity table, synthesized html/head/body. The engine decodes HTML entities directly into text — no marker pipeline, so the marker split scan is stood down. Incremental parse (libleptris v1.6/#586): yields completed elements as the parse runs; each prior subtree is released. Yielded elements are parentless (document nil) and valid only inside the block — the wrapper mirrors that lifetime. Wrapper-parse: the synthetic root's children are the fragment's top-level nodes (the append_xml / inner_xml= trick). Children come through the normal children path so entity-marker splitting applies.



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# File 'lib/moxml/adapter/leptris.rb', line 737

def parse_fragment(xml, _context = nil)
  doc = parse("<m>#{xml}</m>")
  # Lifetime seam (#245): the fragment's natives live in the
  # parse document's C tree, and the binding Document is the
  # sole owner with a GC finalizer. The parent_node chain
  # (fragment -> synthetic <m> -> Document wrapper) keeps the
  # owning wrappers strongly reachable from every returned
  # node; the wrappers are minted HERE and returned as-is —
  # re-wrapping at the caller would race the context map's
  # weak values and silently drop the chain.
  root_wrapper = doc.root
  root_wrapper.parent_node = doc
  children(root_wrapper.native).map do |child|
    wrapped = Node.wrap(child, doc.context)
    wrapped.parent_node = root_wrapper
    wrapped
  end
end

.parse_html(html, _options = {}, _context = nil) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 774

def parse_html(html, _options = {}, _context = nil)
  html_string = html.is_a?(IO) || html.is_a?(StringIO) ? html.read : html.to_s
  native_doc = begin
    ::Leptris::XML.parse_html(html_string)
  rescue ::Leptris::XML::ParseError => e
    raise Moxml::ParseError.new(e.message)
  end
  attachments.set(native_doc, :entity_markers, false)
  bump_serialize_generation
  Wrappers::Document.new(native_doc, _context || Context.new(:leptris))
end

.plan_rows(native) ⇒ Object 



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

def self.plan_rows(native)
  return nil unless NATIVE_READ_LAYER

  doc = if native.is_a?(::Leptris::XML::Document)
          native
        else
          doc_for(native)
        end
  return nil if doc.nil? || attachments.get(doc, :entity_markers)

  root_binding = if native.is_a?(::Leptris::XML::Document)
                   doc.root
                 else
                   to_binding(native)
                 end
  return nil unless root_binding

  rows = ::Leptris::XML::Native.snapshot_rows(doc,
                                              root_binding.c_address)
  rows.each do |row|
    yield(row[0], row[1], row[2], row[3])
  end
  true
end

.plan_structs(native, spec) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 543

def self.plan_structs(native, spec)
  return nil unless NATIVE_PLAN_STRUCTS

  doc = if native.is_a?(::Leptris::XML::Document)
          native
        else
          doc_for(native)
        end
  return nil if doc.nil? || attachments.get(doc, :entity_markers)

  root_binding = if native.is_a?(::Leptris::XML::Document)
                   doc.root
                 else
                   to_binding(native)
                 end
  return nil unless root_binding

  ::Leptris::XML::Native.plan_structs(doc, root_binding.c_address,
                                      spec)
end

.prefix_part(name) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1055

def prefix_part(name)
  name.include?(":") ? name.split(":", 2)[0] : nil
end

.prefixed_attribute_test?(ast, parent_axis = nil) ⇒ Boolean

Released native engines 1.9.37–1.9.39 do not match prefixed attribute tests inside predicates (@p:kind='a'); the Ruby engine does. An attribute test is a :test whose parent axis is "attribute"; bare ones (namespace nil) stay native. Retired above PREFIXED_ATTR_PREDICATES_NATIVE (1.9.40+).

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1989

def prefixed_attribute_test?(ast, parent_axis = nil)
  if ast.type == :test && parent_axis == "attribute"
    ns = ast.value[:namespace]
    return true if ns && !ns.empty? && ns != "xmlns"
  end

  axis = ast.children.first if ast.type == :axis

  ast.children.any? do |child|
    child.is_a?(XPath::AST::Node) &&
      prefixed_attribute_test?(child, axis || (child.type == :axis ? nil : parent_axis))
  end
end

.previous_sibling(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1379

def previous_sibling(node)
  # Bridged, not the native sibling walk: the native layer
  # exposes next_sibling only, and its children batch
  # truncates at 512 — the predecessor beyond that would be
  # wrong.
  node = to_binding(node)
  node.previous_sibling if node.is_a?(::Leptris::XML::Node)
end

.processing_instruction_content(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1740

def processing_instruction_content(node)
  return NN_CONTENT.bind_call(node) if NATIVE_READ_LAYER && node.is_a?(NN)

  node.content
end

.processing_instruction_target(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1059

def processing_instruction_target(node)
  return to_binding(node).target if NATIVE_READ_LAYER && node.is_a?(NN)

  node.target
end

.record_native_doc(root_native, doc) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 341

def record_native_doc(root_native, doc)
  @native_doc_roots[root_native] = doc
end

.remove(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1595

def remove(node)
  node = to_binding(node) if NATIVE_READ_LAYER
  case node
  when CustomizedLeptris::Declaration
    remove_declaration(node.parent_doc) if node.parent_doc
  when CustomizedLeptris::Doctype
    attachments.delete(node.parent_doc, :doctype) if node.parent_doc
  when ::Leptris::XML::DocType
    if NATIVE_DOC_PARTS
      doc = node.document || doc_for(node)
      if doc
        doc.remove_doctype
        attachments.delete(doc, :doctype)
      end
    end
  when CustomizedLeptris::EntityReference
    marker_text_for(node.parent, node.name)&.unlink
  when CustomizedLeptris::DocumentPI
    if NATIVE_DOC_PARTS && node.parent_doc
      pis = node.parent_doc.processing_instructions
      index = pis.index do |target, data|
        target == node.target && data == node.data
      end
      if index
        node.parent_doc.remove_pi(index)
        node.parent_doc = nil
      end
    else
      raise Moxml::NotImplementedError.new(
        "libleptris has no document-level PI removal",
        adapter: :leptris,
        feature: :remove,
      )
    end
  else
    node.unlink
  end
end

.remove_attribute(element, name) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1491

def remove_attribute(element, name)
  element = to_binding(element)
  element.remove_attribute(name.to_s)
end

.remove_attribute_native(attr) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1496

def remove_attribute_native(attr)
  attr.element.remove_attribute(attr.name)
  attr
end

.remove_declaration(native_doc) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 926

def remove_declaration(native_doc)
  attachments.delete(native_doc, :declaration)
  attachments.delete(native_doc, :had_source_declaration)
  if NATIVE_DOC_PARTS && native_doc.is_a?(::Leptris::XML::Document)
    native_doc.clear_declaration
  end
end

.replace(node, new_node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1634

def replace(node, new_node)
  if NATIVE_READ_LAYER
    node = to_binding(node)
    new_node = to_binding(new_node)
  end
  return node.replace(new_node) if node.is_a?(::Leptris::XML::Element)

  # libleptris only offers element-anchored insertion, so a
  # content node (text/comment/CDATA/PI) is replaced by
  # unlinking and re-inserting: after an element sibling when
  # one exists, else appended (end-of-list) to the parent.
  parent = node.parent
  unless parent
    raise Moxml::DocumentStructureError.new(
      "cannot replace a detached node",
    )
  end

  prev = node.previous_sibling
  node.unlink
  if prev.is_a?(::Leptris::XML::Element)
    prev.add_next_sibling(new_node)
  else
    parent.add_child(new_node)
  end
  new_node
end

.replace_children(node, new_children) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1662

def replace_children(node, new_children)
  if NATIVE_READ_LAYER
    node = to_binding(node)
    new_children = new_children.map { |child| to_binding(child) }
  end
  node.children = new_children
end

.resolve_prefix_ns(owner, prefix) ⇒ Object

Nearest in-scope declaration of prefix, walking owner then ancestors. Unbound prefix → nil. Returns the Namespace object so wrappers keep prefix and uri.



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# File 'lib/moxml/adapter/leptris.rb', line 1044

def resolve_prefix_ns(owner, prefix)
  current = owner
  while current.is_a?(::Leptris::XML::Element)
    hit = current.namespace_definitions.find { |ns| ns.prefix == prefix }
    return hit if hit

    current = current.parent
  end
  nil
end

.root(document) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1399

def root(document)
  r = document.root
  return nil if r.nil?

  if NATIVE_READ_LAYER
    # Through the same address-keyed cache as the children
    # path: NativeNode.from alone mints a fresh object per
    # call on 1.9.163.x, splitting the wrappers (issue #219).
    native = canonical_native(document, r)
    record_native_doc(native, document)
    return native
  end
  r
end

.root_parent(node) ⇒ Object

The binding reports the root element as parentless; the moxml contract roots at the document.



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# File 'lib/moxml/adapter/leptris.rb', line 1368

def root_parent(node)
  node.parent || (node.document&.root == node ? node.document : nil)
end

.same_node?(one, other) ⇒ Boolean

Protocol-level node equality: one engine can hand out two wrapper classes over the same C node (native layer + binding), so raw == is not identity across the seam.

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 348

def same_node?(one, other)
  return true if one.equal?(other)

  if NATIVE_READ_LAYER
    native_one = one.is_a?(::Leptris::XML::NativeNode)
    native_other = other.is_a?(::Leptris::XML::NativeNode)
    if native_one || native_other
      address_one = native_one ? one.address : one.c_ptr.address
      address_other = native_other ? other.address : other.c_ptr.address
      return address_one == address_other
    end
  end

  one == other
end

.sax_parse(xml, handler) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 2030

def sax_parse(xml, handler)
  bridge = LeptrisSAXBridge.new(handler)
  xml_string = xml.is_a?(IO) || xml.is_a?(::StringIO) ? xml.read : xml.to_s
  ::Leptris::XML::SAX::Parser.new(bridge).parse(xml_string)
rescue ::Leptris::XML::ParseError, ::Leptris::XML::Error => e
  handler.on_error(Moxml::ParseError.new(e.message))
end

.selects_attribute_results?(ast) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1971

def selects_attribute_results?(ast)
  case ast.type
  when :pipe, :union, :filter_expr
    ast.children.any? { |child| selects_attribute_results?(child) }
  when :absolute_path, :relative_path
    step = ast.children.last
    step = step.children.first if step.type == :step_with_predicates
    step.type == :axis && step.children.first == "attribute"
  else
    false
  end
end

.set_attribute(element, name, value) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1461

def set_attribute(element, name, value)
  element = to_binding(element) if NATIVE_READ_LAYER
  element[name.to_s] = value.to_s
end

.set_attribute_name(attr, name) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1466

def set_attribute_name(attr, name)
  # Attr is an immutable value object; renames go through the
  # element and yield a fresh native, which the wrapper adopts.
  element = attr.element
  value = attr.value
  element.remove_attribute(attr.name)
  element[name.to_s] = value
  element.attribute_nodes.reverse.find { |candidate| candidate.name == name.to_s }
end

.set_attribute_namespace(attr, namespace) ⇒ Object

Attr is an immutable value object: namespace changes go through the owning element, recreating the attribute with a qualified name, and yield a fresh native for the wrapper.



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# File 'lib/moxml/adapter/leptris.rb', line 995

def set_attribute_namespace(attr, namespace)
  element = attr.element
  local = attr.name.include?(":") ? attr.name.split(":", 2)[1] : attr.name
  value = attr.value
  element.remove_attribute(attr.name)
  prefix = namespace.is_a?(String) ? nil : namespace.prefix
  uri = namespace.is_a?(String) ? namespace : namespace.href
  qualified = prefix.nil? || prefix.empty? ? local : "#{prefix}:#{local}"
  element[qualified] = value
  if prefix && !prefix.empty? && !uri.to_s.empty? && !resolve_prefix_ns(element, prefix)
    element.add_namespace_definition(prefix, uri.to_s)
  end
  element.attribute_nodes.reverse.find { |candidate| candidate.name == qualified }
end

.set_attribute_value(attr, value) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1476

def set_attribute_value(attr, value)
  attr.value = value.to_s
  attr
end

.set_cdata_content(node, content) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1724

def set_cdata_content(node, content)
  node = to_binding(node) if NATIVE_READ_LAYER
  node.content = content.to_s
end

.set_comment_content(node, content) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1735

def set_comment_content(node, content)
  node = to_binding(node) if NATIVE_READ_LAYER
  node.content = content.to_s
end

.set_declaration_attribute(declaration, attr_name, value) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 910

def set_declaration_attribute(declaration, attr_name, value)
  declaration.public_send("#{attr_name}=", value) if attr_matches?(attr_name)
end

.set_namespace(node, namespace) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 939

def set_namespace(node, namespace)
  node = to_binding(node) if NATIVE_READ_LAYER
  return set_attribute_namespace(node, namespace) if node.is_a?(::Leptris::XML::Attr)

  element = node
  if namespace.nil?
    # Supported un-prefix (#245, relaton migration): rename
    # the node to its local part (name = local) — the
    # serializer re-attaches the old prefix after namespace=
    # nil on prefixed elements until leptris-ruby#244 lands.
    # Nil-clear contract (issue #164): undeclare the default
    # namespace (xmlns="") and drop any name prefix — the
    # element then reports no namespace, matching the other
    # adapters. Elements that carried a PREFIX cannot fully
    # detach the engine's namespace link (leptris-ruby#132):
    # the name is unqualified and the undeclaration added, but
    # the serializer may re-attach the old prefix until the
    # engine grows a clear entry.
    element.name = element.name.split(":", 2)[-1] if element.name.include?(":")
    element.default_namespace = ""
    return element
  end
  prefix = namespace.is_a?(String) ? nil : namespace.prefix
  uri = namespace.is_a?(String) ? namespace : namespace.href
  if prefix.nil? || prefix.empty?
    element.default_namespace = uri.to_s
    # Drop any prefix from the element name: a default namespace
    # never applies to a prefixed name.
    element.name = element.name.split(":", 2)[-1] if element.name.include?(":")
  else
    # Name is the local part re-prefixed (a qname create leaves
    # "p:c"; re-joining without the split would double —
    # issue #208). Declare only when the prefix is not already
    # in scope: under a parent that binds p, a bare name set
    # is enough (leptris resolves through ancestors). Detached
    # elements still get the declaration so a standalone
    # serialize stays well-formed.
    local = element.name.split(":", 2)[-1]
    element.name = "#{prefix}:#{local}"
    already = resolve_prefix_ns(element, prefix)
    needs_decl = already.nil? || already.href.to_s != uri.to_s
    # Detached elements that will be attached under a declaring
    # parent must not carry their own declaration — that is
    # the create_element(qname) + namespace= + attach order
    # (issue #208). Standalone serialize of a still-detached
    # namespaced element is the add_namespace caller's job.
    if needs_decl && !element.parent.nil?
      element.add_namespace_definition(prefix, uri.to_s)
    end
  end
  element
end

.set_node_name(node, name) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1143

def set_node_name(node, name)
  node = to_binding(node) if NATIVE_READ_LAYER
  case node
  when ::Leptris::XML::ProcessingInstruction, CustomizedLeptris::DocumentPI then node.target = name
  else node.name = name
  end
end

.set_processing_instruction_content(node, content) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1746

def set_processing_instruction_content(node, content)
  node = to_binding(node) if NATIVE_READ_LAYER
  node.data = content.to_s
end

.set_root(doc, element) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 594

def set_root(doc, element)
  to_binding(doc).root = to_binding(element)
end

.set_text_content(node, content) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1708

def set_text_content(node, content)
  node = to_binding(node) if NATIVE_READ_LAYER
  case node
  when ::Leptris::XML::Document
    node.root&.content = content.to_s
  else
    node.content = content.to_s
  end
end

.sibling_walk_children(node) ⇒ Object

Fallback for natives without a registered document: walk first_child/next_sibling at the FFI level and wrap binding nodes over the raw pointers.



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# File 'lib/moxml/adapter/leptris.rb', line 1276

def sibling_walk_children(node)
  ptr = ::FFI::Pointer.new(node.address)
  first = ::Leptris::XML::FFI.leptris_node_first_child(ptr)
  children = []
  current = first
  until current.null?
    children << ::Leptris::XML::Node.wrap(current, nil)
    current = ::Leptris::XML::FFI.leptris_node_next_sibling(current)
  end
  children
end

.source_position(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1414

def source_position(node)
  return nil unless NATIVE_SOURCE_POSITION

  to_binding(node).source_position
end

.strip_blank_text_nodes!(doc) ⇒ Object

libxml2's XML_PARSE_NOBLANKS semantics (issues #153/#156): drop WHOLLY-whitespace text nodes; the boundary spaces of text-bearing nodes stay (mixed content cannot be re-indented). Raw-pointer walk over the root subtree — the same batch child-pointer pattern the materializer uses.



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# File 'lib/moxml/adapter/leptris.rb', line 809

def strip_blank_text_nodes!(doc)
  binding_ffi = ::Leptris::XML::FFI
  root = binding_ffi.leptris_document_root(doc.c_ptr)
  return unless root && !root.null?

  strip_blanks_under(root, binding_ffi, ::FFI::MemoryPointer.new(:pointer, 64), 64)
end

.strip_blanks_under(ptr, binding_ffi, buf, capacity) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 817

def strip_blanks_under(ptr, binding_ffi, buf, capacity)
  count = binding_ffi.leptris_node_children(ptr, buf, capacity)
  while count == capacity
    capacity *= 4
    buf = ::FFI::MemoryPointer.new(:pointer, capacity)
    count = binding_ffi.leptris_node_children(ptr, buf, capacity)
  end

  # Snapshot before unlinking or recursing — both reuse the
  # buffer for the next level.
  children = buf.read_array_of_pointer(count)
  children.each do |child|
    case binding_ffi.leptris_node_get_type(child)
    when ::Leptris::XML::FFI::NODE_ELEMENT
      strip_blanks_under(child, binding_ffi, buf, capacity)
    when ::Leptris::XML::FFI::NODE_TEXT
      content = binding_ffi.leptris_text_node_get_content(child)
      next unless content.match?(BLANK_TEXT_RE)

      binding_ffi.check_status(binding_ffi.leptris_node_unlink(child))
    end
  end
end

.text_content(node) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 1670

def text_content(node)
  if NATIVE_READ_LAYER && node.is_a?(::Leptris::XML::NativeNode)
    content = NN_CONTENT.bind_call(node)
    return content if NATIVE_STRINGS_UTF8

    content.dup.force_encoding(Encoding::UTF_8)
  end

  # Frequency-ordered: elements dominate reads; they paid
  # three failed compares to reach the else arm. The
  # duplicated branch bodies are the point.
  case node
  when ::Leptris::XML::Element, ::Leptris::XML::Text
    node.content.to_s
  when ::Leptris::XML::Document then node.root ? node.root.content : ""
  when CustomizedLeptris::Declaration, CustomizedLeptris::Doctype,
       CustomizedLeptris::EntityReference
    ""
  when CustomizedLeptris::TextSegment then node.content
  else node.content.to_s # rubocop:disable Lint/DuplicateBranch
  end
end

.to_binding(node) ⇒ Object

native -> bridged binding node. The bridge object is identity-stable for the native's lifetime (the binding's per-document wrap cache), so repeat bridges — the write loop on a factory-created element, re-accessed attribute lists — skip the document resolution and pointer wrap. Binding node for any native: identity for binding nodes (and on installs without the native layer — the constant check short-circuits), a Node.wrap over the shared C pointer for NativeNodes.



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# File 'lib/moxml/adapter/leptris.rb', line 152

def to_binding(node)
  return node unless NATIVE_READ_LAYER &&
    node.is_a?(::Leptris::XML::NativeNode)

  bridged = @binding_of[node]
  return bridged if bridged

  doc = doc_for(node)
  ptr = ::FFI::Pointer.new(node.address)
  bridged = ::Leptris::XML::Node.wrap(ptr, doc)
  @binding_of[node] = bridged unless bridged.nil?
  bridged
end

.uses_xmlns_prefix?(ast) ⇒ Boolean

xmlns:name is a nokogiri-compat convention addressing elements in the default namespace; only the Ruby engine implements it.

Returns:

  • (Boolean) 


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# File 'lib/moxml/adapter/leptris.rb', line 1963

def uses_xmlns_prefix?(ast)
  return true if ast.type == :test && ast.value[:namespace] == "xmlns"

  ast.children.any? do |child|
    child.is_a?(XPath::AST::Node) && uses_xmlns_prefix?(child)
  end
end

.walk_descendants(native, context) ⇒ Object

One C visit walk (TODO.perf/27: post-order/abort state in the C callback, rb_yield direct — no FFI closure per node) instead of per-level children walks. Pre-order via entering; depth 0 is the receiver and stays unyielded.



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

def walk_descendants(native, context)
  return nil unless NATIVE_C_WALK

  root = to_binding(native)
  return nil unless root.is_a?(::Leptris::XML::Element) ||
    root.is_a?(::Leptris::XML::Document)

  root.visit do |node, entering, depth|
    if entering && depth.positive?
      yield Moxml::Node.wrap_with(node, context, self)
    end
  end
end

.wrap_native(node, type, _context) ⇒ Object 



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# File 'lib/moxml/adapter/leptris.rb', line 300

def wrap_native(node, type, _context)
  return nil unless NATIVE_IDENTITY &&
    node.is_a?(::Leptris::XML::NativeNode)

  # from() registers in the shared address-keyed native
  # cache, so later canonical/bulk mints hand OUR instance
  # back — a native already carrying the contract IS the
  # wrapper; minting again would loop per access.
  return node if node.is_a?(::Moxml::Node)

  klass = Identity::TYPES[type]
  return nil unless klass

  doc = doc_for(node)
  return nil unless doc

  klass.from(doc, node)
end

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



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# File 'lib/moxml/adapter/leptris.rb', line 1800

def xpath(node, expression, namespaces = {})
  node = to_binding(node) if NATIVE_READ_LAYER
  native = native_xpath(node, expression, namespaces)
  return native unless native.nil?

  engine_xpath(node, expression, namespaces)
end