Class: Nokogiri::XML::Node

Inherits:
Object
  • Object
show all
Includes:
Enumerable, PP::Node
Defined in:
lib/nokogiri/xml/node.rb,
lib/nokogiri/xml/node/save_options.rb,
ext/nokogiri/xml_dtd.c,
ext/nokogiri/xml_attr.c,
ext/nokogiri/xml_node.c,
ext/nokogiri/xml_text.c,
ext/nokogiri/xml_cdata.c,
ext/nokogiri/xml_comment.c,
ext/nokogiri/xml_document.c,
ext/nokogiri/html_document.c,
ext/nokogiri/xml_entity_decl.c,
ext/nokogiri/xml_element_decl.c,
ext/nokogiri/xml_attribute_decl.c,
ext/nokogiri/xml_entity_reference.c,
ext/nokogiri/xml_document_fragment.c,
ext/nokogiri/xml_processing_instruction.c

Overview

Nokogiri::XML::Node is your window to the fun filled world of dealing with XML and HTML tags. A Nokogiri::XML::Node may be treated similarly to a hash with regard to attributes. For example (from irb):

irb(main):004:0> node
=> <a href="#foo" id="link">link</a>
irb(main):005:0> node['href']
=> "#foo"
irb(main):006:0> node.keys
=> ["href", "id"]
irb(main):007:0> node.values
=> ["#foo", "link"]
irb(main):008:0> node['class'] = 'green'
=> "green"
irb(main):009:0> node
=> <a href="#foo" id="link" class="green">link</a>
irb(main):010:0>

See Nokogiri::XML::Node#[] and Nokogiri::XML#[]= for more information.

Nokogiri::XML::Node also has methods that let you move around your tree. For navigating your tree, see:

  • Nokogiri::XML::Node#parent

  • Nokogiri::XML::Node#children

  • Nokogiri::XML::Node#next

  • Nokogiri::XML::Node#previous

You may search this node’s subtree using Node#xpath and Node#css

Defined Under Namespace

Classes: SaveOptions

Constant Summary collapse

ELEMENT_NODE =

Element node type, see Nokogiri::XML::Node#element?

1
ATTRIBUTE_NODE =

Attribute node type

2
TEXT_NODE =

Text node type, see Nokogiri::XML::Node#text?

3
CDATA_SECTION_NODE =

CDATA node type, see Nokogiri::XML::Node#cdata?

4
ENTITY_REF_NODE =

Entity reference node type

5
ENTITY_NODE =

Entity node type

6
PI_NODE =

PI node type

7
COMMENT_NODE =

Comment node type, see Nokogiri::XML::Node#comment?

8
DOCUMENT_NODE =

Document node type, see Nokogiri::XML::Node#xml?

9
DOCUMENT_TYPE_NODE =

Document type node type

10
DOCUMENT_FRAG_NODE =

Document fragment node type

11
NOTATION_NODE =

Notation node type

12
HTML_DOCUMENT_NODE =

HTML document node type, see Nokogiri::XML::Node#html?

13
DTD_NODE =

DTD node type

14
ELEMENT_DECL =

Element declaration type

15
ATTRIBUTE_DECL =

Attribute declaration type

16
ENTITY_DECL =

Entity declaration type

17
NAMESPACE_DECL =

Namespace declaration type

18
XINCLUDE_START =

XInclude start type

19
XINCLUDE_END =

XInclude end type

20
DOCB_DOCUMENT_NODE =

DOCB document node type

21

Class Method Summary collapse

Instance Method Summary collapse

Methods included from PP::Node

#inspect, #pretty_print

Constructor Details

#initialize(name, document) ⇒ Node

:nodoc:



83
84
85
 
# File 'lib/nokogiri/xml/node.rb', line 83

def initialize name, document # :nodoc:
  # ... Ya.  This is empty on purpose.
end

Class Method Details

.new(name, document) ⇒ Object

Create a new node with name sharing GC lifecycle with document



1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
 
# File 'ext/nokogiri/xml_node.c', line 1095

static VALUE new(int argc, VALUE *argv, VALUE klass)
{
  xmlDocPtr doc;
  xmlNodePtr node;
  VALUE name;
  VALUE document;
  VALUE rest;
  VALUE rb_node;

  rb_scan_args(argc, argv, "2*", &name, &document, &rest);

  Data_Get_Struct(document, xmlDoc, doc);

  node = xmlNewNode(NULL, (xmlChar *)StringValuePtr(name));
  node->doc = doc->doc;
  NOKOGIRI_ROOT_NODE(node);

  rb_node = Nokogiri_wrap_xml_node(
      klass == cNokogiriXmlNode ? (VALUE)NULL : klass,
      node
  );
  rb_obj_call_init(rb_node, argc, argv);

  if(rb_block_given_p()) rb_yield(rb_node);

  return rb_node;
}

Instance Method Details

#<<(node_or_tags) ⇒ Object

Add node_or_tags as a child of this Node. node_or_tags can be a Nokogiri::XML::Node, a ::DocumentFragment, a ::NodeSet, or a string containing markup.

Returns self, to support chaining of calls (e.g., root << child1 << child2)

Also see related method add_child.



282
283
284
285
 
# File 'lib/nokogiri/xml/node.rb', line 282

def << node_or_tags
  add_child node_or_tags
  self
end

#<=>(other) ⇒ Object

Compare two Node objects with respect to their Document. Nodes from different documents cannot be compared.



862
863
864
865
866
 
# File 'lib/nokogiri/xml/node.rb', line 862

def <=> other
  return nil unless other.is_a?(Nokogiri::XML::Node)
  return nil unless document == other.document
  compare other
end

#==(other) ⇒ Object

Test to see if this Node is equal to other



708
709
710
711
712
 
# File 'lib/nokogiri/xml/node.rb', line 708

def == other
  return false unless other
  return false unless other.respond_to?(:pointer_id)
  pointer_id == other.pointer_id
end

#>(selector) ⇒ Object

Search this node’s immediate children using CSS selector selector



219
220
221
222
 
# File 'lib/nokogiri/xml/node.rb', line 219

def > selector
  ns = document.root.namespaces
  xpath CSS.xpath_for(selector, :prefix => "./", :ns => ns).first
end

#[](name) ⇒ Object Also known as: get_attribute, attr

Get the attribute value for the attribute name



253
254
255
256
 
# File 'lib/nokogiri/xml/node.rb', line 253

def [] name
  return nil unless key?(name.to_s)
  get(name.to_s)
end

#[]=(property, value) ⇒ Object Also known as: set_attribute

Set the property to value



659
660
661
662
663
664
665
666
667
668
 
# File 'ext/nokogiri/xml_node.c', line 659

static VALUE set(VALUE self, VALUE property, VALUE value)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);

  xmlSetProp(node, (xmlChar *)StringValuePtr(property),
      (xmlChar *)StringValuePtr(value));

  return value;
}

#accept(visitor) ⇒ Object

Accept a visitor. This method calls “visit” on visitor with self.



702
703
704
 
# File 'lib/nokogiri/xml/node.rb', line 702

def accept visitor
  visitor.visit(self)
end

#add_child(node_or_tags) ⇒ Object

Add node_or_tags as a child of this Node. node_or_tags can be a Nokogiri::XML::Node, a ::DocumentFragment, a ::NodeSet, or a string containing markup.

Returns the reparented node (if node_or_tags is a Node), or NodeSet (if node_or_tags is a DocumentFragment, NodeSet, or string).

Also see related method <<.



265
266
267
268
269
270
271
272
273
 
# File 'lib/nokogiri/xml/node.rb', line 265

def add_child node_or_tags
  node_or_tags = coerce(node_or_tags)
  if node_or_tags.is_a?(XML::NodeSet)
    node_or_tags.each { |n| add_child_node n }
  else
    add_child_node node_or_tags
  end
  node_or_tags
end

#add_namespace_definition(prefix, href) ⇒ Object Also known as: add_namespace

Adds a namespace definition with prefix using href value. The result is as if parsed XML for this node had included an attribute ‘xmlns:prefix=value’. A default namespace for this node (“xmlns=”) can be added by passing ‘nil’ for prefix. Namespaces added this way will not show up in #attributes, but they will be included as an xmlns attribute when the node is serialized to XML.



1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
 
# File 'ext/nokogiri/xml_node.c', line 1057

static VALUE add_namespace_definition(VALUE self, VALUE prefix, VALUE href)
{
  xmlNodePtr node, namespacee;
  xmlNsPtr ns;

  Data_Get_Struct(self, xmlNode, node);
  namespacee = node ;

  ns = xmlSearchNs(
      node->doc,
      node,
      (const xmlChar *)(NIL_P(prefix) ? NULL : StringValuePtr(prefix))
  );

  if(!ns) {
    if (node->type != XML_ELEMENT_NODE) {
      namespacee = node->parent;
    }
    ns = xmlNewNs(
        namespacee,
        (const xmlChar *)StringValuePtr(href),
        (const xmlChar *)(NIL_P(prefix) ? NULL : StringValuePtr(prefix))
    );
  }

  if (!ns) return Qnil ;

  if(NIL_P(prefix) || node != namespacee) xmlSetNs(node, ns);

  return Nokogiri_wrap_xml_namespace(node->doc, ns);
}

#add_next_sibling(node_or_tags) ⇒ Object Also known as: next=

Insert node_or_tags after this Node (as a sibling). node_or_tags can be a Nokogiri::XML::Node, a ::DocumentFragment, a ::NodeSet, or a string containing markup.

Returns the reparented node (if node_or_tags is a Node), or NodeSet (if node_or_tags is a DocumentFragment, NodeSet, or string).

Also see related method after.



317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
 
# File 'lib/nokogiri/xml/node.rb', line 317

def add_next_sibling node_or_tags
  node_or_tags = coerce(node_or_tags)
  if node_or_tags.is_a?(XML::NodeSet)
    if text?
      pivot = Nokogiri::XML::Node.new 'dummy', document
      add_next_sibling_node pivot
    else
      pivot = self
    end
    node_or_tags.reverse_each { |n| pivot.send :add_next_sibling_node, n }
    pivot.unlink if text?
  else
    add_next_sibling_node node_or_tags
  end
  node_or_tags
end

#add_previous_sibling(node_or_tags) ⇒ Object Also known as: previous=

Insert node_or_tags before this Node (as a sibling). node_or_tags can be a Nokogiri::XML::Node, a ::DocumentFragment, a ::NodeSet, or a string containing markup.

Returns the reparented node (if node_or_tags is a Node), or NodeSet (if node_or_tags is a DocumentFragment, NodeSet, or string).

Also see related method before.



293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
 
# File 'lib/nokogiri/xml/node.rb', line 293

def add_previous_sibling node_or_tags
  node_or_tags = coerce(node_or_tags)
  if node_or_tags.is_a?(XML::NodeSet)
    if text?
      pivot = Nokogiri::XML::Node.new 'dummy', document
      add_previous_sibling_node pivot
    else
      pivot = self
    end
    node_or_tags.each { |n| pivot.send :add_previous_sibling_node, n }
    pivot.unlink if text?
  else
    add_previous_sibling_node node_or_tags
  end
  node_or_tags
end

#after(node_or_tags) ⇒ Object

Insert node_or_tags after this node (as a sibling). node_or_tags can be a Nokogiri::XML::Node, a Nokogiri::XML::DocumentFragment, or a string containing markup.

Returns self, to support chaining of calls.

Also see related method add_next_sibling.



353
354
355
356
 
# File 'lib/nokogiri/xml/node.rb', line 353

def after node_or_tags
  add_next_sibling node_or_tags
  self
end

#ancestors(selector = nil) ⇒ Object

Get a list of ancestor Node for this Node. If selector is given, the ancestors must match selector



643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
 
# File 'lib/nokogiri/xml/node.rb', line 643

def ancestors selector = nil
  return NodeSet.new(document) unless respond_to?(:parent)
  return NodeSet.new(document) unless parent

  parents = [parent]

  while parents.last.respond_to?(:parent)
    break unless ctx_parent = parents.last.parent
    parents << ctx_parent
  end

  return NodeSet.new(document, parents) unless selector

  root = parents.last

  NodeSet.new(document, parents.find_all { |parent|
    root.search(selector).include?(parent)
  })
end

#at(path, ns = document.root ? document.root.namespaces : {}) ⇒ Object Also known as: %

Search for the first occurrence of path.

Returns nil if nothing is found, otherwise a Node.



228
229
230
 
# File 'lib/nokogiri/xml/node.rb', line 228

def at path, ns = document.root ? document.root.namespaces : {}
  search(path, ns).first
end

#at_css(*rules) ⇒ Object

Search this node for the first occurrence of CSS rules. Equivalent to css(rules).first See Node#css for more information.



247
248
249
 
# File 'lib/nokogiri/xml/node.rb', line 247

def at_css *rules
  css(*rules).first
end

#at_xpath(*paths) ⇒ Object

Search this node for the first occurrence of XPath paths. Equivalent to xpath(paths).first See Node#xpath for more information.



238
239
240
 
# File 'lib/nokogiri/xml/node.rb', line 238

def at_xpath *paths
  xpath(*paths).first
end

#attribute(name) ⇒ Object

Get the attribute node with name



722
723
724
725
726
727
728
729
730
731
 
# File 'ext/nokogiri/xml_node.c', line 722

static VALUE attr(VALUE self, VALUE name)
{
  xmlNodePtr node;
  xmlAttrPtr prop;
  Data_Get_Struct(self, xmlNode, node);
  prop = xmlHasProp(node, (xmlChar *)StringValuePtr(name));

  if(! prop) return Qnil;
  return Nokogiri_wrap_xml_node(Qnil, (xmlNodePtr)prop);
}

#attribute_nodes ⇒ Object

returns a list containing the Node attributes.



757
758
759
760
761
762
763
764
765
766
767
768
769
 
# File 'ext/nokogiri/xml_node.c', line 757

static VALUE attribute_nodes(VALUE self)
{
    /* this code in the mode of xmlHasProp() */
    xmlNodePtr node;
    VALUE attr;

    Data_Get_Struct(self, xmlNode, node);

    attr = rb_ary_new();
    Nokogiri_xml_node_properties(node, attr);

    return attr ;
}

#attribute_with_ns(name, namespace) ⇒ Object

Get the attribute node with name and namespace



739
740
741
742
743
744
745
746
747
748
749
 
# File 'ext/nokogiri/xml_node.c', line 739

static VALUE attribute_with_ns(VALUE self, VALUE name, VALUE namespace)
{
  xmlNodePtr node;
  xmlAttrPtr prop;
  Data_Get_Struct(self, xmlNode, node);
  prop = xmlHasNsProp(node, (xmlChar *)StringValuePtr(name),
      NIL_P(namespace) ? NULL : (xmlChar *)StringValuePtr(namespace));

  if(! prop) return Qnil;
  return Nokogiri_wrap_xml_node(Qnil, (xmlNodePtr)prop);
}

#attributes ⇒ Object

Returns a hash containing the node’s attributes. The key is the attribute name without any namespace, the value is a Nokogiri::XML::Attr representing the attribute. If you need to distinguish attributes with the same name, with different namespaces use #attribute_nodes instead.



454
455
456
457
458
 
# File 'lib/nokogiri/xml/node.rb', line 454

def attributes
  Hash[*(attribute_nodes.map { |node|
    [node.node_name, node]
  }.flatten)]
end

#before(node_or_tags) ⇒ Object

Insert node_or_tags before this node (as a sibling). node_or_tags can be a Nokogiri::XML::Node, a ::DocumentFragment, a ::NodeSet, or a string containing markup.

Returns self, to support chaining of calls.

Also see related method add_previous_sibling.



341
342
343
344
 
# File 'lib/nokogiri/xml/node.rb', line 341

def before node_or_tags
  add_previous_sibling node_or_tags
  self
end

#blank? ⇒ Boolean

Is this node blank?

Returns:

  • (Boolean) 


403
404
405
406
407
408
 
# File 'ext/nokogiri/xml_node.c', line 403

static VALUE blank_eh(VALUE self)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);
  return (1 == xmlIsBlankNode(node)) ? Qtrue : Qfalse ;
}

#cdata? ⇒ Boolean

Returns true if this is a CDATA

Returns:

  • (Boolean) 


576
577
578
 
# File 'lib/nokogiri/xml/node.rb', line 576

def cdata?
  type == CDATA_SECTION_NODE
end

#child ⇒ Object

Returns the child node



569
570
571
572
573
574
575
576
577
578
 
# File 'ext/nokogiri/xml_node.c', line 569

static VALUE child(VALUE self)
{
  xmlNodePtr node, child;
  Data_Get_Struct(self, xmlNode, node);

  child = node->children;
  if(!child) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, child);
}

#children ⇒ Object

Get the list of children for this node as a NodeSet



496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
 
# File 'ext/nokogiri/xml_node.c', line 496

static VALUE children(VALUE self)
{
  xmlNodePtr node;
  xmlNodePtr child;
  xmlNodeSetPtr set;
  VALUE document;
  VALUE node_set;

  Data_Get_Struct(self, xmlNode, node);

  child = node->children;
  set = xmlXPathNodeSetCreate(child);

  document = DOC_RUBY_OBJECT(node->doc);

  if(!child) return Nokogiri_wrap_xml_node_set(set, document);

  child = child->next;
  while(NULL != child) {
    xmlXPathNodeSetAddUnique(set, child);
    child = child->next;
  }

  node_set = Nokogiri_wrap_xml_node_set(set, document);

  return node_set;
}

#children=(node_or_tags) ⇒ Object

Set the inner html for this Node node_or_tags node_or_tags can be a Nokogiri::XML::Node, a Nokogiri::XML::DocumentFragment, or a string containing markup.

Returns the reparented node (if node_or_tags is a Node), or NodeSet (if node_or_tags is a DocumentFragment, NodeSet, or string).

Also see related method inner_html=



377
378
379
380
381
382
383
384
385
386
 
# File 'lib/nokogiri/xml/node.rb', line 377

def children= node_or_tags
  node_or_tags = coerce(node_or_tags)
  children.unlink
  if node_or_tags.is_a?(XML::NodeSet)
    node_or_tags.each { |n| add_child_node n }
  else
    add_child_node node_or_tags
  end
  node_or_tags
end

#comment? ⇒ Boolean

Returns true if this is a Comment

Returns:

  • (Boolean) 


571
572
573
 
# File 'lib/nokogiri/xml/node.rb', line 571

def comment?
  type == COMMENT_NODE
end

#content ⇒ Object Also known as: text, inner_text

Returns the content for this Node



892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
 
# File 'ext/nokogiri/xml_node.c', line 892

static VALUE get_content(VALUE self)
{
  xmlNodePtr node;
  xmlChar * content;

  Data_Get_Struct(self, xmlNode, node);

  content = xmlNodeGetContent(node);
  if(content) {
    VALUE rval = NOKOGIRI_STR_NEW2(content);
    xmlFree(content);
    return rval;
  }
  return Qnil;
}

#content=(string) ⇒ Object

Set the Node’s content to a Text node containing string. The string gets XML escaped, not interpreted as markup.



532
533
534
 
# File 'lib/nokogiri/xml/node.rb', line 532

def content= string
  self.native_content = encode_special_chars(string.to_s)
end

#create_external_subset(name, external_id, system_id) ⇒ Object

Create an external subset



284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
 
# File 'ext/nokogiri/xml_node.c', line 284

static VALUE create_external_subset(VALUE self, VALUE name, VALUE external_id, VALUE system_id)
{
  xmlNodePtr node;
  xmlDocPtr doc;
  xmlDtdPtr dtd;

  Data_Get_Struct(self, xmlNode, node);

  doc = node->doc;

  if(doc->extSubset)
    rb_raise(rb_eRuntimeError, "Document already has an external subset");

  dtd = xmlNewDtd(
      doc,
      NIL_P(name)        ? NULL : (const xmlChar *)StringValuePtr(name),
      NIL_P(external_id) ? NULL : (const xmlChar *)StringValuePtr(external_id),
      NIL_P(system_id)   ? NULL : (const xmlChar *)StringValuePtr(system_id)
  );

  if(!dtd) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, (xmlNodePtr)dtd);
}

#create_internal_subset(name, external_id, system_id) ⇒ Object

Create the internal subset of a document.

doc.create_internal_subset("chapter", "-//OASIS//DTD DocBook XML//EN", "chapter.dtd")
# => <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML//EN" "chapter.dtd">

doc.create_internal_subset("chapter", nil, "chapter.dtd")
# => <!DOCTYPE chapter SYSTEM "chapter.dtd">



253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
 
# File 'ext/nokogiri/xml_node.c', line 253

static VALUE create_internal_subset(VALUE self, VALUE name, VALUE external_id, VALUE system_id)
{
  xmlNodePtr node;
  xmlDocPtr doc;
  xmlDtdPtr dtd;

  Data_Get_Struct(self, xmlNode, node);

  doc = node->doc;

  if(xmlGetIntSubset(doc))
    rb_raise(rb_eRuntimeError, "Document already has an internal subset");

  dtd = xmlCreateIntSubset(
      doc,
      NIL_P(name)        ? NULL : (const xmlChar *)StringValuePtr(name),
      NIL_P(external_id) ? NULL : (const xmlChar *)StringValuePtr(external_id),
      NIL_P(system_id)   ? NULL : (const xmlChar *)StringValuePtr(system_id)
  );

  if(!dtd) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, (xmlNodePtr)dtd);
}

#css(*rules) ⇒ Object

call-seq: css *rules, [namespace-bindings, custom-pseudo-class]

Search this node for CSS rules. rules must be one or more CSS selectors. For example:

node.css('title')
node.css('body h1.bold')
node.css('div + p.green', 'div#one')

A hash of namespace bindings may be appended. For example:

node.css('bike|tire', {'bike' => 'http://schwinn.com/'})

Custom CSS pseudo classes may also be defined. To define custom pseudo classes, create a class and implement the custom pseudo class you want defined. The first argument to the method will be the current matching NodeSet. Any other arguments are ones that you pass in. For example:

node.css('title:regex("\w+")', Class.new {
  def regex node_set, regex
    node_set.find_all { |node| node['some_attribute'] =~ /#{regex}/ }
  end
}.new)

Note that the CSS query string is case-sensitive with regards to your document type. That is, if you’re looking for “H1” in an HTML document, you’ll never find anything, since HTML tags will match only lowercase CSS queries. However, “H1” might be found in an XML document, where tags names are case-sensitive (e.g., “H1” is distinct from “h1”).



205
206
207
208
209
210
211
212
213
214
215
 
# File 'lib/nokogiri/xml/node.rb', line 205

def css *rules
  rules, handler, ns, binds = extract_params(rules)

  prefix = "#{implied_xpath_context}/"

  rules = rules.map { |rule|
    CSS.xpath_for(rule, :prefix => prefix, :ns => ns)
  }.flatten.uniq + [ns, handler, binds].compact

  xpath(*rules)
end

#css_path ⇒ Object

Get the path to this node as a CSS expression



634
635
636
637
638
 
# File 'lib/nokogiri/xml/node.rb', line 634

def css_path
  path.split(/\//).map { |part|
    part.length == 0 ? nil : part.gsub(/\[(\d+)\]/, ':nth-of-type(\1)')
  }.compact.join(' > ')
end

#decorate! ⇒ Object

Decorate this node with the decorators set up in this node’s Document



89
90
91
 
# File 'lib/nokogiri/xml/node.rb', line 89

def decorate!
  document.decorate(self)
end

#default_namespace=(url) ⇒ Object

Adds a default namespace supplied as a string url href, to self. The consequence is as an xmlns attribute with supplied argument were present in parsed XML. A default namespace set with this method will now show up in #attributes, but when this node is serialized to XML an “xmlns” attribute will appear. See also #namespace and #namespace=



669
670
671
 
# File 'lib/nokogiri/xml/node.rb', line 669

def default_namespace= url
  add_namespace_definition(nil, url)
end

#description ⇒ Object

Fetch the Nokogiri::HTML::ElementDescription for this node. Returns nil on XML documents and on unknown tags.



603
604
605
606
 
# File 'lib/nokogiri/xml/node.rb', line 603

def description
  return nil if document.xml?
  Nokogiri::HTML::ElementDescription[name]
end

#document ⇒ Object

Get the document for this Node



196
197
198
199
200
201
 
# File 'ext/nokogiri/xml_node.c', line 196

static VALUE document(VALUE self)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);
  return DOC_RUBY_OBJECT(node->doc);
}

#dup ⇒ Object Also known as: clone

Copy this node. An optional depth may be passed in, but it defaults to a deep copy. 0 is a shallow copy, 1 is a deep copy.



364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
 
# File 'ext/nokogiri/xml_node.c', line 364

static VALUE duplicate_node(int argc, VALUE *argv, VALUE self)
{
  VALUE level;
  xmlNodePtr node, dup;

  if(rb_scan_args(argc, argv, "01", &level) == 0)
    level = INT2NUM((long)1);

  Data_Get_Struct(self, xmlNode, node);

  dup = xmlDocCopyNode(node, node->doc, (int)NUM2INT(level));
  if(dup == NULL) return Qnil;

  NOKOGIRI_ROOT_NODE(dup);

  return Nokogiri_wrap_xml_node(rb_obj_class(self), dup);
}

#each(&block) ⇒ Object

Iterate over each attribute name and value pair for this Node.



474
475
476
477
478
 
# File 'lib/nokogiri/xml/node.rb', line 474

def each &block
  attribute_nodes.each { |node|
    block.call([node.node_name, node.value])
  }
end

#element? ⇒ Boolean Also known as: elem?

Returns true if this is an Element node

Returns:

  • (Boolean) 


616
617
618
 
# File 'lib/nokogiri/xml/node.rb', line 616

def element?
  type == ELEMENT_NODE
end

#element_children ⇒ Object Also known as: elements

Get the list of children for this node as a NodeSet. All nodes will be element nodes.

Example:

@doc.root.element_children.all? { |x| x.element? } # => true



535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
 
# File 'ext/nokogiri/xml_node.c', line 535

static VALUE element_children(VALUE self)
{
  xmlNodePtr node;
  xmlNodePtr child;
  xmlNodeSetPtr set;
  VALUE document;
  VALUE node_set;

  Data_Get_Struct(self, xmlNode, node);

  child = xmlFirstElementChild(node);
  set = xmlXPathNodeSetCreate(child);

  document = DOC_RUBY_OBJECT(node->doc);

  if(!child) return Nokogiri_wrap_xml_node_set(set, document);

  child = xmlNextElementSibling(child);
  while(NULL != child) {
    xmlXPathNodeSetAddUnique(set, child);
    child = xmlNextElementSibling(child);
  }

  node_set = Nokogiri_wrap_xml_node_set(set, document);

  return node_set;
}

#encode_special_chars(string) ⇒ Object

Encode any special characters in string



223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
 
# File 'ext/nokogiri/xml_node.c', line 223

static VALUE encode_special_chars(VALUE self, VALUE string)
{
  xmlNodePtr node;
  xmlChar *encoded;
  VALUE encoded_str;

  Data_Get_Struct(self, xmlNode, node);
  encoded = xmlEncodeSpecialChars(
      node->doc,
      (const xmlChar *)StringValuePtr(string)
  );

  encoded_str = NOKOGIRI_STR_NEW2(encoded);
  xmlFree(encoded);

  return encoded_str;
}

#external_subset ⇒ Object

Get the external subset



315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
 
# File 'ext/nokogiri/xml_node.c', line 315

static VALUE external_subset(VALUE self)
{
  xmlNodePtr node;
  xmlDocPtr doc;
  xmlDtdPtr dtd;

  Data_Get_Struct(self, xmlNode, node);

  if(!node->doc) return Qnil;

  doc = node->doc;
  dtd = doc->extSubset;

  if(!dtd) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, (xmlNodePtr)dtd);
}

#first_element_child ⇒ Object

Returns the first child node of this node that is an element.

Example:

@doc.root.first_element_child.element? # => true



590
591
592
593
594
595
596
597
598
599
 
# File 'ext/nokogiri/xml_node.c', line 590

static VALUE first_element_child(VALUE self)
{
  xmlNodePtr node, child;
  Data_Get_Struct(self, xmlNode, node);

  child = xmlFirstElementChild(node);
  if(!child) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, child);
}

#fragment(tags) ⇒ Object

Create a DocumentFragment containing tags that is relative to this context node.



496
497
498
499
 
# File 'lib/nokogiri/xml/node.rb', line 496

def fragment tags
  type = document.html? ? Nokogiri::HTML : Nokogiri::XML
  type::DocumentFragment.new(document, tags, self)
end

#fragment? ⇒ Boolean

Returns true if this is a DocumentFragment

Returns:

  • (Boolean) 


596
597
598
 
# File 'lib/nokogiri/xml/node.rb', line 596

def fragment?
  type == DOCUMENT_FRAG_NODE
end

#html? ⇒ Boolean

Returns true if this is an HTML::Document node

Returns:

  • (Boolean) 


586
587
588
 
# File 'lib/nokogiri/xml/node.rb', line 586

def html?
  type == HTML_DOCUMENT_NODE
end

#inner_html(*args) ⇒ Object

Get the inner_html for this node’s Node#children



629
630
631
 
# File 'lib/nokogiri/xml/node.rb', line 629

def inner_html *args
  children.map { |x| x.to_html(*args) }.join
end

#inner_html=(node_or_tags) ⇒ Object

Set the inner html for this Node to node_or_tags node_or_tags can be a Nokogiri::XML::Node, a Nokogiri::XML::DocumentFragment, or a string containing markup.

Returns self.

Also see related method children=



365
366
367
368
 
# File 'lib/nokogiri/xml/node.rb', line 365

def inner_html= node_or_tags
  self.children = node_or_tags
  self
end

#internal_subset ⇒ Object

Get the internal subset



339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
 
# File 'ext/nokogiri/xml_node.c', line 339

static VALUE internal_subset(VALUE self)
{
  xmlNodePtr node;
  xmlDocPtr doc;
  xmlDtdPtr dtd;

  Data_Get_Struct(self, xmlNode, node);

  if(!node->doc) return Qnil;

  doc = node->doc;
  dtd = xmlGetIntSubset(doc);

  if(!dtd) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, (xmlNodePtr)dtd);
}

#key?(attribute) ⇒ Boolean Also known as: has_attribute?

Returns true if attribute is set

Returns:

  • (Boolean) 


628
629
630
631
632
633
634
635
 
# File 'ext/nokogiri/xml_node.c', line 628

static VALUE key_eh(VALUE self, VALUE attribute)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);
  if(xmlHasProp(node, (xmlChar *)StringValuePtr(attribute)))
    return Qtrue;
  return Qfalse;
}

#keys ⇒ Object

Get the attribute names for this Node.



468
469
470
 
# File 'lib/nokogiri/xml/node.rb', line 468

def keys
  attribute_nodes.map { |node| node.node_name }
end

#last_element_child ⇒ Object

Returns the last child node of this node that is an element.

Example:

@doc.root.last_element_child.element? # => true



611
612
613
614
615
616
617
618
619
620
 
# File 'ext/nokogiri/xml_node.c', line 611

static VALUE last_element_child(VALUE self)
{
  xmlNodePtr node, child;
  Data_Get_Struct(self, xmlNode, node);

  child = xmlLastElementChild(node);
  if(!child) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, child);
}

#line ⇒ Object

Returns the line for this Node



1038
1039
1040
1041
1042
1043
1044
 
# File 'ext/nokogiri/xml_node.c', line 1038

static VALUE line(VALUE self)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);

  return INT2NUM(xmlGetLineNo(node));
}

#matches?(selector) ⇒ Boolean

Returns true if this Node matches selector

Returns:

  • (Boolean) 


489
490
491
 
# File 'lib/nokogiri/xml/node.rb', line 489

def matches? selector
  ancestors.last.search(selector).include?(self)
end

#namespace ⇒ Object

returns the default namespace set on this node (as with an “xmlns=” attribute), as a Namespace object.



779
780
781
782
783
784
785
786
787
788
 
# File 'ext/nokogiri/xml_node.c', line 779

static VALUE namespace(VALUE self)
{
  xmlNodePtr node ;
  Data_Get_Struct(self, xmlNode, node);

  if (node->ns)
    return Nokogiri_wrap_xml_namespace(node->doc, node->ns);

  return Qnil ;
}

#namespace=(ns) ⇒ Object

Set the default namespace on this node (as would be defined with an “xmlns=” attribute in XML source), as a Namespace object ns. Note that a Namespace added this way will NOT be serialized as an xmlns attribute for this node. You probably want #default_namespace= instead, or perhaps #add_namespace_definition with a nil prefix argument.



680
681
682
683
684
685
686
687
688
689
690
691
 
# File 'lib/nokogiri/xml/node.rb', line 680

def namespace= ns
  return set_namespace(ns) unless ns

  unless Nokogiri::XML::Namespace === ns
    raise TypeError, "#{ns.class} can't be coerced into Nokogiri::XML::Namespace"
  end
  if ns.document != document
    raise ArgumentError, 'namespace must be declared on the same document'
  end

  set_namespace ns
end

#namespace_definitions ⇒ Object

returns namespaces defined on self element directly, as an array of Namespace objects. Includes both a default namespace (as in“xmlns=”), and prefixed namespaces (as in “xmlns:prefix=”).



796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
 
# File 'ext/nokogiri/xml_node.c', line 796

static VALUE namespace_definitions(VALUE self)
{
  /* this code in the mode of xmlHasProp() */
  xmlNodePtr node ;
  VALUE list;
  xmlNsPtr ns;

  Data_Get_Struct(self, xmlNode, node);

  list = rb_ary_new();

  ns = node->nsDef;

  if(!ns) return list;

  while(NULL != ns) {
    rb_ary_push(list, Nokogiri_wrap_xml_namespace(node->doc, ns));
    ns = ns->next;
  }

  return list;
}

#namespace_scopes ⇒ Object

returns namespaces in scope for self – those defined on self element directly or any ancestor node – as an array of Namespace objects. Default namespaces (“xmlns=” style) for self are included in this array; Default namespaces for ancestors, however, are not. See also #namespaces



828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
 
# File 'ext/nokogiri/xml_node.c', line 828

static VALUE namespace_scopes(VALUE self)
{
  xmlNodePtr node ;
  VALUE list;
  xmlNsPtr *ns_list;
  int j;

  Data_Get_Struct(self, xmlNode, node);

  list = rb_ary_new();
  ns_list = xmlGetNsList(node->doc, node);

  if(!ns_list) return list;

  for (j = 0 ; ns_list[j] != NULL ; ++j) {
    rb_ary_push(list, Nokogiri_wrap_xml_namespace(node->doc, ns_list[j]));
  }

  xmlFree(ns_list);
  return list;
}

#namespaced_key?(attribute, namespace) ⇒ Boolean

Returns true if attribute is set with namespace

Returns:

  • (Boolean) 


643
644
645
646
647
648
649
650
651
 
# File 'ext/nokogiri/xml_node.c', line 643

static VALUE namespaced_key_eh(VALUE self, VALUE attribute, VALUE namespace)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);
  if(xmlHasNsProp(node, (xmlChar *)StringValuePtr(attribute),
        NIL_P(namespace) ? NULL : (xmlChar *)StringValuePtr(namespace)))
    return Qtrue;
  return Qfalse;
}

#namespaces ⇒ Object

Returns a Hash of => value for all namespaces on this node and its ancestors.

This method returns the same namespaces as #namespace_scopes.

Returns namespaces in scope for self – those defined on self element directly or any ancestor node – as a Hash of attribute-name/value pairs. Note that the keys in this hash XML attributes that would be used to define this namespace, such as “xmlns:prefix”, not just the prefix. Default namespace set on self will be included with key “xmlns”. However, default namespaces set on ancestor will NOT be, even if self has no explicit default namespace.



557
558
559
560
561
562
563
564
565
566
567
568
 
# File 'lib/nokogiri/xml/node.rb', line 557

def namespaces
  Hash[*namespace_scopes.map { |nd|
    key = ['xmlns', nd.prefix].compact.join(':')
    if RUBY_VERSION >= '1.9' && document.encoding
      begin
        key.force_encoding document.encoding
      rescue ArgumentError
      end
    end
    [key, nd.href]
  }.flatten]
end

#next_element ⇒ Object

Returns the next Nokogiri::XML::Element type sibling node.



450
451
452
453
454
455
456
457
458
459
 
# File 'ext/nokogiri/xml_node.c', line 450

static VALUE next_element(VALUE self)
{
  xmlNodePtr node, sibling;
  Data_Get_Struct(self, xmlNode, node);

  sibling = xmlNextElementSibling(node);
  if(!sibling) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, sibling);
}

#next_sibling ⇒ Object Also known as: next

Returns the next sibling node



416
417
418
419
420
421
422
423
424
425
 
# File 'ext/nokogiri/xml_node.c', line 416

static VALUE next_sibling(VALUE self)
{
  xmlNodePtr node, sibling;
  Data_Get_Struct(self, xmlNode, node);

  sibling = node->next;
  if(!sibling) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, sibling) ;
}

#name ⇒ Object Also known as: name

Returns the name for this Node



951
952
953
954
955
956
957
958
 
# File 'ext/nokogiri/xml_node.c', line 951

static VALUE get_name(VALUE self)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);
  if(node->name)
    return NOKOGIRI_STR_NEW2(node->name);
  return Qnil;
}

#name=(new_name) ⇒ Object Also known as: name=

Set the name for this Node



937
938
939
940
941
942
943
 
# File 'ext/nokogiri/xml_node.c', line 937

static VALUE set_name(VALUE self, VALUE new_name)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);
  xmlNodeSetName(node, (xmlChar*)StringValuePtr(new_name));
  return new_name;
}

#node_type ⇒ Object Also known as: type

Get the type for this Node



856
857
858
859
860
861
 
# File 'ext/nokogiri/xml_node.c', line 856

static VALUE node_type(VALUE self)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);
  return INT2NUM((long)node->type);
}

#parent ⇒ Object

Get the parent Node for this Node



920
921
922
923
924
925
926
927
928
929
 
# File 'ext/nokogiri/xml_node.c', line 920

static VALUE get_parent(VALUE self)
{
  xmlNodePtr node, parent;
  Data_Get_Struct(self, xmlNode, node);

  parent = node->parent;
  if(!parent) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, parent) ;
}

#parent=(parent_node) ⇒ Object

Set the parent Node for this Node



538
539
540
541
 
# File 'lib/nokogiri/xml/node.rb', line 538

def parent= parent_node
  parent_node.add_child(self)
  parent_node
end

#parse(string_or_io, options = nil) {|options| ... } ⇒ Object

Parse string_or_io as a document fragment within the context of this node. Returns a XML::NodeSet containing the nodes parsed from string_or_io.

Yields:

  • (options) 


505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
 
# File 'lib/nokogiri/xml/node.rb', line 505

def parse string_or_io, options = nil
  options ||= (document.html? ? ParseOptions::DEFAULT_HTML : ParseOptions::DEFAULT_XML)
  if Fixnum === options
    options = Nokogiri::XML::ParseOptions.new(options)
  end
  # Give the options to the user
  yield options if block_given?

  contents = string_or_io.respond_to?(:read) ?
    string_or_io.read :
    string_or_io

  return Nokogiri::XML::NodeSet.new(document) if contents.empty?

  ##
  # This is a horrible hack, but I don't care. See #313 for background.
  error_count = document.errors.length
  node_set = in_context(contents, options.to_i)
  if node_set.empty? and document.errors.length > error_count and options.recover?
    fragment = Nokogiri::HTML::DocumentFragment.parse contents
    node_set = fragment.children
  end
  node_set
end

#path ⇒ Object

Returns the path associated with this Node



966
967
968
969
970
971
972
973
974
975
976
977
978
 
# File 'ext/nokogiri/xml_node.c', line 966

static VALUE path(VALUE self)
{
  xmlNodePtr node;
  xmlChar *path ;
  VALUE rval;

  Data_Get_Struct(self, xmlNode, node);

  path = xmlGetNodePath(node);
  rval = NOKOGIRI_STR_NEW2(path);
  xmlFree(path);
  return rval ;
}

#pointer_id ⇒ Object

Get the internal pointer number



209
210
211
212
213
214
215
 
# File 'ext/nokogiri/xml_node.c', line 209

static VALUE pointer_id(VALUE self)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);

  return INT2NUM((long)(node));
}

#previous_element ⇒ Object

Returns the previous Nokogiri::XML::Element type sibling node.



467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
 
# File 'ext/nokogiri/xml_node.c', line 467

static VALUE previous_element(VALUE self)
{
  xmlNodePtr node, sibling;
  Data_Get_Struct(self, xmlNode, node);

  /*
   *  note that we don't use xmlPreviousElementSibling here because it's buggy pre-2.7.7.
   */
  sibling = node->prev;
  if(!sibling) return Qnil;

  while(sibling && sibling->type != XML_ELEMENT_NODE)
    sibling = sibling->prev;

  return sibling ? Nokogiri_wrap_xml_node(Qnil, sibling) : Qnil ;
}

#previous_sibling ⇒ Object Also known as: previous

Returns the previous sibling node



433
434
435
436
437
438
439
440
441
442
 
# File 'ext/nokogiri/xml_node.c', line 433

static VALUE previous_sibling(VALUE self)
{
  xmlNodePtr node, sibling;
  Data_Get_Struct(self, xmlNode, node);

  sibling = node->prev;
  if(!sibling) return Qnil;

  return Nokogiri_wrap_xml_node(Qnil, sibling);
}

#read_only? ⇒ Boolean

Is this a read only node?

Returns:

  • (Boolean) 


610
611
612
613
 
# File 'lib/nokogiri/xml/node.rb', line 610

def read_only?
  # According to gdome2, these are read-only node types
  [NOTATION_NODE, ENTITY_NODE, ENTITY_DECL].include?(type)
end

#remove_attribute(name) ⇒ Object Also known as: delete

Remove the attribute named name



482
483
484
 
# File 'lib/nokogiri/xml/node.rb', line 482

def remove_attribute name
  attributes[name].remove if key? name
end

#replace(node_or_tags) ⇒ Object

Replace this Node with node_or_tags. node_or_tags can be a Nokogiri::XML::Node, a ::DocumentFragment, a ::NodeSet, or a string containing markup.

Returns the reparented node (if node_or_tags is a Node), or NodeSet (if node_or_tags is a DocumentFragment, NodeSet, or string).

Also see related method swap.



395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
 
# File 'lib/nokogiri/xml/node.rb', line 395

def replace node_or_tags
  node_or_tags = coerce(node_or_tags)
  if node_or_tags.is_a?(XML::NodeSet)
    if text?
      replacee = Nokogiri::XML::Node.new 'dummy', document
      add_previous_sibling_node replacee
      unlink
    else
      replacee = self
    end
    node_or_tags.each { |n| replacee.add_previous_sibling n }
    replacee.unlink
  else
    replace_node node_or_tags
  end
  node_or_tags
end

#search(*paths) ⇒ Object Also known as: /

Search this node for paths. paths can be XPath or CSS, and an optional hash of namespaces may be appended. See Node#xpath and Node#css.



97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
 
# File 'lib/nokogiri/xml/node.rb', line 97

def search *paths
  # TODO use         paths, handler, ns, binds = extract_params(paths)
  ns = paths.last.is_a?(Hash) ? paths.pop :
    (document.root ? document.root.namespaces : {})

  prefix = "#{implied_xpath_context}/"

  xpath(*(paths.map { |path|
    path = path.to_s
    path =~ /^(\.\/|\/|\.\.)/ ? path : CSS.xpath_for(
      path,
      :prefix => prefix,
      :ns     => ns
    )
  }.flatten.uniq) + [ns])
end

#serialize(*args, &block) ⇒ Object

Serialize Node using options. Save options can also be set using a block. See SaveOptions.

These two statements are equivalent:

node.serialize(:encoding => 'UTF-8', :save_with => FORMAT | AS_XML)

or

node.serialize(:encoding => 'UTF-8') do |config|
  config.format.as_xml
end



728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
 
# File 'lib/nokogiri/xml/node.rb', line 728

def serialize *args, &block
  options = args.first.is_a?(Hash) ? args.shift : {
    :encoding   => args[0],
    :save_with  => args[1]
  }

  encoding = options[:encoding] || document.encoding
  options[:encoding] = encoding

  outstring = ""
  if encoding && outstring.respond_to?(:force_encoding)
    outstring.force_encoding(Encoding.find(encoding))
  end
  io = StringIO.new(outstring)
  write_to io, options, &block
  io.string
end

#swap(node_or_tags) ⇒ Object

Swap this Node for node_or_tags node_or_tags can be a Nokogiri::XML::Node, a ::DocumentFragment, a ::NodeSet, or a string containing markup.

Returns self, to support chaining of calls.

Also see related method replace.



420
421
422
423
 
# File 'lib/nokogiri/xml/node.rb', line 420

def swap node_or_tags
  replace node_or_tags
  self
end

#text? ⇒ Boolean

Returns true if this is a Text node

Returns:

  • (Boolean) 


591
592
593
 
# File 'lib/nokogiri/xml/node.rb', line 591

def text?
  type == TEXT_NODE
end

#to_html(options = {}) ⇒ Object

Serialize this Node to HTML

doc.to_html

See Node#write_to for a list of options. For formatted output, use Node#to_xhtml instead.



753
754
755
756
757
758
759
760
 
# File 'lib/nokogiri/xml/node.rb', line 753

def to_html options = {}
  # FIXME: this is a hack around broken libxml versions
  return dump_html if Nokogiri.uses_libxml? && %w[2 6] === LIBXML_VERSION.split('.')[0..1]

  options[:save_with] |= SaveOptions::DEFAULT_HTML if options[:save_with]
  options[:save_with] = SaveOptions::DEFAULT_HTML unless options[:save_with]
  serialize(options)
end

#to_s ⇒ Object

Turn this node in to a string. If the document is HTML, this method returns html. If the document is XML, this method returns XML.



624
625
626
 
# File 'lib/nokogiri/xml/node.rb', line 624

def to_s
  document.xml? ? to_xml : to_html
end

#to_xhtml(options = {}) ⇒ Object

Serialize this Node to XHTML using options

doc.to_xhtml(:indent => 5, :encoding => 'UTF-8')

See Node#write_to for a list of options



780
781
782
783
784
785
786
787
 
# File 'lib/nokogiri/xml/node.rb', line 780

def to_xhtml options = {}
  # FIXME: this is a hack around broken libxml versions
  return dump_html if Nokogiri.uses_libxml? && %w[2 6] === LIBXML_VERSION.split('.')[0..1]

  options[:save_with] |= SaveOptions::DEFAULT_XHTML if options[:save_with]
  options[:save_with] = SaveOptions::DEFAULT_XHTML unless options[:save_with]
  serialize(options)
end

#to_xml(options = {}) ⇒ Object

Serialize this Node to XML using options

doc.to_xml(:indent => 5, :encoding => 'UTF-8')

See Node#write_to for a list of options



768
769
770
771
772
 
# File 'lib/nokogiri/xml/node.rb', line 768

def to_xml options = {}
  options[:save_with] |= SaveOptions::DEFAULT_XML if options[:save_with]
  options[:save_with] = SaveOptions::DEFAULT_XML unless options[:save_with]
  serialize(options)
end

#traverse(&block) ⇒ Object

Yields self and all children to block recursively.



695
696
697
698
 
# File 'lib/nokogiri/xml/node.rb', line 695

def traverse &block
  children.each{|j| j.traverse(&block) }
  block.call(self)
end

#unlink ⇒ Object Also known as: remove

Unlink this node from its current context.



388
389
390
391
392
393
394
395
 
# File 'ext/nokogiri/xml_node.c', line 388

static VALUE unlink_node(VALUE self)
{
  xmlNodePtr node;
  Data_Get_Struct(self, xmlNode, node);
  xmlUnlinkNode(node);
  NOKOGIRI_ROOT_NODE(node);
  return self;
}

#values ⇒ Object

Get the attribute values for this Node.



462
463
464
 
# File 'lib/nokogiri/xml/node.rb', line 462

def values
  attribute_nodes.map { |node| node.value }
end

#write_html_to(io, options = {}) ⇒ Object

Write Node as HTML to io with options

See Node#write_to for a list of options



828
829
830
831
832
833
834
 
# File 'lib/nokogiri/xml/node.rb', line 828

def write_html_to io, options = {}
  # FIXME: this is a hack around broken libxml versions
  return (io << dump_html) if Nokogiri.uses_libxml? && %w[2 6] === LIBXML_VERSION.split('.')[0..1]

  options[:save_with] ||= SaveOptions::DEFAULT_HTML
  write_to io, options
end

#write_to(io, *options) {|config| ... } ⇒ Object

Write Node to io with options. options modify the output of this method. Valid options are:

  • :encoding for changing the encoding

  • :indent_text the indentation text, defaults to one space

  • :indent the number of :indent_text to use, defaults to 2

  • :save_with a combination of SaveOptions constants.

To save with UTF-8 indented twice:

node.write_to(io, :encoding => 'UTF-8', :indent => 2)

To save indented with two dashes:

node.write_to(io, :indent_text => '-', :indent => 2

Yields:

  • (config) 


806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
 
# File 'lib/nokogiri/xml/node.rb', line 806

def write_to io, *options
  options       = options.first.is_a?(Hash) ? options.shift : {}
  encoding      = options[:encoding] || options[0]
  if Nokogiri.jruby?
    save_options  = options[:save_with] || options[1]
    indent_times  = options[:indent] || 0
  else
    save_options  = options[:save_with] || options[1] || SaveOptions::FORMAT
    indent_times  = options[:indent] || 2
  end
  indent_text   = options[:indent_text] || ' '

  config = SaveOptions.new(save_options.to_i)
  yield config if block_given?

  native_write_to(io, encoding, indent_text * indent_times, config.options)
end

#write_xhtml_to(io, options = {}) ⇒ Object

Write Node as XHTML to io with options

See Node#write_to for a list of options



840
841
842
843
844
845
846
 
# File 'lib/nokogiri/xml/node.rb', line 840

def write_xhtml_to io, options = {}
  # FIXME: this is a hack around broken libxml versions
  return (io << dump_html) if Nokogiri.uses_libxml? && %w[2 6] === LIBXML_VERSION.split('.')[0..1]

  options[:save_with] ||= SaveOptions::DEFAULT_XHTML
  write_to io, options
end

#write_xml_to(io, options = {}) ⇒ Object

Write Node as XML to io with options

doc.write_xml_to io, :encoding => 'UTF-8'

See Node#write_to for a list of options



854
855
856
857
 
# File 'lib/nokogiri/xml/node.rb', line 854

def write_xml_to io, options = {}
  options[:save_with] ||= SaveOptions::DEFAULT_XML
  write_to io, options
end

#xml? ⇒ Boolean

Returns true if this is an XML::Document node

Returns:

  • (Boolean) 


581
582
583
 
# File 'lib/nokogiri/xml/node.rb', line 581

def xml?
  type == DOCUMENT_NODE
end

#xpath(*paths) ⇒ Object

call-seq: xpath *paths, [namespace-bindings, variable-bindings, custom-handler-class]

Search this node for XPath paths. paths must be one or more XPath queries.

node.xpath('.//title')

A hash of namespace bindings may be appended. For example:

node.xpath('.//foo:name', {'foo' => 'http://example.org/'})
node.xpath('.//xmlns:name', node.root.namespaces)

A hash of variable bindings may also be appended to the namespace bindings. For example:

node.xpath('.//address[@domestic=$value]', nil, {:value => 'Yes'})

Custom XPath functions may also be defined. To define custom functions create a class and implement the function you want to define. The first argument to the method will be the current matching NodeSet. Any other arguments are ones that you pass in. Note that this class may appear anywhere in the argument list. For example:

node.xpath('.//title[regex(., "\w+")]', Class.new {
  def regex node_set, regex
    node_set.find_all { |node| node['some_attribute'] =~ /#{regex}/ }
  end
}.new)



145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
 
# File 'lib/nokogiri/xml/node.rb', line 145

def xpath *paths
  return NodeSet.new(document) unless document

  paths, handler, ns, binds = extract_params(paths)

  sets = paths.map { |path|
    ctx = XPathContext.new(self)
    ctx.register_namespaces(ns)
    path = path.gsub(/\/xmlns:/,'/:') unless Nokogiri.uses_libxml?

    binds.each do |key,value|
      ctx.register_variable key.to_s, value
    end if binds

    ctx.evaluate(path, handler)
  }
  return sets.first if sets.length == 1

  NodeSet.new(document) do |combined|
    sets.each do |set|
      set.each do |node|
        combined << node
      end
    end
  end
end