Class: Nokogiri::XML::Document

Inherits:
Node
  • Object
show all
Defined in:
lib/nokogiri/xml/document.rb,
ext/nokogiri/xml_document.c

Overview

Nokogiri::XML::Document is the main entry point for dealing with XML documents. The Document is created by parsing XML content from a String or an IO object. See Nokogiri::XML::Document.parse for more information on parsing.

Document inherits a great deal of functionality from its superclass Nokogiri::XML::Node, so please read that class’s documentation as well.

Direct Known Subclasses

HTML4::Document, HTML::Document

Constant Summary collapse

NCNAME_START_CHAR =

See www.w3.org/TR/REC-xml-names/#ns-decl for more details. Note that we’re not attempting to handle unicode characters partly because libxml2 doesn’t handle unicode characters in NCNAMEs.

"A-Za-z_"
NCNAME_CHAR = 
NCNAME_START_CHAR + "\\-\\.0-9"
NCNAME_RE = 
/^xmlns(?::([#{NCNAME_START_CHAR}][#{NCNAME_CHAR}]*))?$/

Constants inherited from Node

Node::ATTRIBUTE_DECL, Node::ATTRIBUTE_NODE, Node::CDATA_SECTION_NODE, Node::COMMENT_NODE, Node::DECONSTRUCT_KEYS, Node::DECONSTRUCT_METHODS, Node::DOCB_DOCUMENT_NODE, Node::DOCUMENT_FRAG_NODE, Node::DOCUMENT_NODE, Node::DOCUMENT_TYPE_NODE, Node::DTD_NODE, Node::ELEMENT_DECL, Node::ELEMENT_NODE, Node::ENTITY_DECL, Node::ENTITY_NODE, Node::ENTITY_REF_NODE, Node::HTML_DOCUMENT_NODE, Node::NAMESPACE_DECL, Node::NOTATION_NODE, Node::PI_NODE, Node::TEXT_NODE, Node::XINCLUDE_END, Node::XINCLUDE_START

Constants included from ClassResolver

ClassResolver::VALID_NAMESPACES

Constants included from Searchable

Searchable::LOOKS_LIKE_XPATH

Constants included from PP::Node

PP::Node::COLLECTIONS

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Node

#<=>, #==, #[], #[]=, #accept, #add_class, #add_namespace_definition, #add_next_sibling, #add_previous_sibling, #after, #ancestors, #append_class, #attribute, #attribute_nodes, #attribute_with_ns, #attributes, #before, #blank?, #cdata?, #child, #children, #children=, #classes, #comment?, #content, #content=, #create_external_subset, #create_internal_subset, #css_path, #data_ptr?, #decorate!, #default_namespace=, #description, #do_xinclude, #document?, #each, #element?, #element_children, #encode_special_chars, #external_subset, #first_element_child, #fragment?, #html?, #inner_html, #inner_html=, #internal_subset, #key?, #keys, #kwattr_add, #kwattr_append, #kwattr_remove, #kwattr_values, #lang, #lang=, #last_element_child, #line, #line=, #matches?, #namespace, #namespace=, #namespace_definitions, #namespace_scopes, #namespaced_key?, #native_content=, #next_element, #next_sibling, #node_name, #node_name=, #node_type, #parent, #parent=, #parse, #path, #pointer_id, #prepend_child, #previous_element, #previous_sibling, #processing_instruction?, #read_only?, #remove_attribute, #remove_class, #replace, #serialize, #swap, #text?, #to_html, #to_s, #to_xhtml, #traverse, #unlink, #value?, #values, #wrap, #write_html_to, #write_to, #write_xhtml_to, #write_xml_to, #xml?

Methods included from ClassResolver

#related_class

Methods included from Searchable

#>, #at, #at_css, #at_xpath, #css, #search, #xpath

Methods included from PP::Node

#inspect, #pretty_print

Methods included from HTML5::Node

#inner_html, #write_to

Constructor Details

#initialize(*args) ⇒ Document

:nodoc: # rubocop:disable Lint/MissingSuper



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# File 'lib/nokogiri/xml/document.rb', line 190

def initialize(*args) # :nodoc: # rubocop:disable Lint/MissingSuper
  @errors     = []
  @decorators = nil
  @namespace_inheritance = false
end

Instance Attribute Details

#errors ⇒ Object

The errors found while parsing a document.

Returns

Array<Nokogiri::XML::SyntaxError>



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# File 'lib/nokogiri/xml/document.rb', line 141

def errors
  @errors
end

#namespace_inheritance ⇒ Object

When ‘true`, reparented elements without a namespace will inherit their new parent’s namespace (if one exists). Defaults to ‘false`.

Returns

Boolean

Example: Default behavior of namespace inheritance

xml = <<~EOF
        <root xmlns:foo="http://nokogiri.org/default_ns/test/foo">
          <foo:parent>
          </foo:parent>
        </root>
      EOF
doc = Nokogiri::XML(xml)
parent = doc.at_xpath("//foo:parent", "foo" => "http://nokogiri.org/default_ns/test/foo")
parent.add_child("<child></child>")
doc.to_xml
# => <?xml version="1.0"?>
#    <root xmlns:foo="http://nokogiri.org/default_ns/test/foo">
#      <foo:parent>
#        <child/>
#      </foo:parent>
#    </root>

Example: Setting namespace inheritance to ‘true`

xml = <<~EOF
        <root xmlns:foo="http://nokogiri.org/default_ns/test/foo">
          <foo:parent>
          </foo:parent>
        </root>
      EOF
doc = Nokogiri::XML(xml)
doc.namespace_inheritance = true
parent = doc.at_xpath("//foo:parent", "foo" => "http://nokogiri.org/default_ns/test/foo")
parent.add_child("<child></child>")
doc.to_xml
# => <?xml version="1.0"?>
#    <root xmlns:foo="http://nokogiri.org/default_ns/test/foo">
#      <foo:parent>
#        <foo:child/>
#      </foo:parent>
#    </root>

Since v1.12.4



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# File 'lib/nokogiri/xml/document.rb', line 188

def namespace_inheritance
  @namespace_inheritance
end

Class Method Details

.new(version = "1.0") ⇒ Object

Create a new empty document declaring XML version version.



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# File 'ext/nokogiri/xml_document.c', line 455

static VALUE
new (int argc, VALUE *argv, VALUE klass)
{
  xmlDocPtr doc;
  VALUE version, rest, rb_doc ;

  rb_scan_args(argc, argv, "0*", &rest);
  version = rb_ary_entry(rest, (long)0);
  if (NIL_P(version)) { version = rb_str_new2("1.0"); }

  doc = xmlNewDoc((xmlChar *)StringValueCStr(version));
  rb_doc = noko_xml_document_wrap_with_init_args(klass, doc, argc, argv);
  return rb_doc ;
}

.parse(string_or_io, url_ = nil, encoding_ = nil, options_ = XML::ParseOptions::DEFAULT_XML, url: url_, encoding: encoding_, options: options_) {|options| ... } ⇒ Object

call-seq:

parse(input) { |options| ... } => Nokogiri::XML::Document
parse(input, url:, encoding:, options:) => Nokogiri::XML::Document

Parse XML input from a String or IO object, and return a new XML::Document.

🛡 By default, Nokogiri treats documents as untrusted, and so does not attempt to load DTDs or access the network. See Nokogiri::XML::ParseOptions for a complete list of options; and that module’s DEFAULT_XML constant for what’s set (and not set) by default.

Required Parameters

  • input (String | IO) The content to be parsed.

Optional Keyword Arguments

  • url: (String) The base URI for this document.

  • encoding: (String) The name of the encoding that should be used when processing the document. When not provided, the encoding will be determined based on the document content.

  • options: (Nokogiri::XML::ParseOptions) Configuration object that determines some behaviors during parsing. See ParseOptions for more information. The default value is ParseOptions::DEFAULT_XML.

Yields

If a block is given, a Nokogiri::XML::ParseOptions object is yielded to the block which can be configured before parsing. See Nokogiri::XML::ParseOptions for more information.

Returns

Nokogiri::XML::Document

Yields:

  • (options) 


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# File 'lib/nokogiri/xml/document.rb', line 56

def parse(
  string_or_io,
  url_ = nil, encoding_ = nil, options_ = XML::ParseOptions::DEFAULT_XML,
  url: url_, encoding: encoding_, options: options_
)
  options = Nokogiri::XML::ParseOptions.new(options) if Integer === options
  yield options if block_given?

  url ||= string_or_io.respond_to?(:path) ? string_or_io.path : nil

  if empty_doc?(string_or_io)
    if options.strict?
      raise Nokogiri::XML::SyntaxError, "Empty document"
    else
      return encoding ? new.tap { |i| i.encoding = encoding } : new
    end
  end

  doc = if string_or_io.respond_to?(:read)
    # TODO: should we instead check for respond_to?(:to_path) ?
    if string_or_io.is_a?(Pathname)
      # resolve the Pathname to the file and open it as an IO object, see #2110
      string_or_io = string_or_io.expand_path.open
      url ||= string_or_io.path
    end

    read_io(string_or_io, url, encoding, options.to_i)
  else
    # read_memory pukes on empty docs
    read_memory(string_or_io, url, encoding, options.to_i)
  end

  # do xinclude processing
  doc.do_xinclude(options) if options.xinclude?

  doc
end

.read_io(io, url, encoding, options) ⇒ Object

Create a new document from an IO object



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# File 'ext/nokogiri/xml_document.c', line 366

static VALUE
noko_xml_document_s_read_io(VALUE rb_class,
                            VALUE rb_io,
                            VALUE rb_url,
                            VALUE rb_encoding,
                            VALUE rb_options)
{
  /* TODO: deprecate this method, parse should be the preferred entry point. then we can make this
     private. */
  libxmlStructuredErrorHandlerState handler_state;
  VALUE rb_errors = rb_ary_new();

  noko__structured_error_func_save_and_set(&handler_state, (void *)rb_errors, noko__error_array_pusher);

  const char *c_url    = NIL_P(rb_url)      ? NULL : StringValueCStr(rb_url);
  const char *c_enc    = NIL_P(rb_encoding) ? NULL : StringValueCStr(rb_encoding);
  xmlDocPtr c_document = xmlReadIO(
                           (xmlInputReadCallback)noko_io_read,
                           (xmlInputCloseCallback)noko_io_close,
                           (void *)rb_io,
                           c_url,
                           c_enc,
                           (int)NUM2INT(rb_options)
                         );

  noko__structured_error_func_restore(&handler_state);

  if (c_document == NULL) {
    xmlFreeDoc(c_document);

    VALUE exception = rb_funcall(cNokogiriXmlSyntaxError, rb_intern("aggregate"), 1, rb_errors);
    if (RB_TEST(exception)) {
      rb_exc_raise(exception);
    } else {
      rb_raise(rb_eRuntimeError, "Could not parse document");
    }
  }

  VALUE rb_document = noko_xml_document_wrap(rb_class, c_document);
  rb_iv_set(rb_document, "@errors", rb_errors);
  return rb_document;
}

.read_memory(string, url, encoding, options) ⇒ Object

Create a new document from a String



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# File 'ext/nokogiri/xml_document.c', line 415

static VALUE
noko_xml_document_s_read_memory(VALUE rb_class,
                                VALUE rb_input,
                                VALUE rb_url,
                                VALUE rb_encoding,
                                VALUE rb_options)
{
  /* TODO: deprecate this method, parse should be the preferred entry point. then we can make this
     private. */
  VALUE rb_errors = rb_ary_new();
  xmlSetStructuredErrorFunc((void *)rb_errors, noko__error_array_pusher);

  const char *c_buffer = StringValuePtr(rb_input);
  const char *c_url    = NIL_P(rb_url)      ? NULL : StringValueCStr(rb_url);
  const char *c_enc    = NIL_P(rb_encoding) ? NULL : StringValueCStr(rb_encoding);
  int c_buffer_len     = (int)RSTRING_LEN(rb_input);
  xmlDocPtr c_document = xmlReadMemory(c_buffer, c_buffer_len, c_url, c_enc, (int)NUM2INT(rb_options));

  xmlSetStructuredErrorFunc(NULL, NULL);

  if (c_document == NULL) {
    VALUE exception = rb_funcall(cNokogiriXmlSyntaxError, rb_intern("aggregate"), 1, rb_errors);
    if (RB_TEST(exception)) {
      rb_exc_raise(exception);
    } else {
      rb_raise(rb_eRuntimeError, "Could not parse document");
    }
  }

  VALUE document = noko_xml_document_wrap(rb_class, c_document);
  rb_iv_set(document, "@errors", rb_errors);
  return document;
}

Instance Method Details

#add_child(node_or_tags) ⇒ Object Also known as: << 



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# File 'lib/nokogiri/xml/document.rb', line 437

def add_child(node_or_tags)
  raise "A document may not have multiple root nodes." if (root && root.name != "nokogiri_text_wrapper") && !(node_or_tags.comment? || node_or_tags.processing_instruction?)

  node_or_tags = coerce(node_or_tags)
  if node_or_tags.is_a?(XML::NodeSet)
    raise "A document may not have multiple root nodes." if node_or_tags.size > 1

    super(node_or_tags.first)
  else
    super
  end
end

#canonicalize(mode = XML_C14N_1_0, inclusive_namespaces = nil, with_comments = false) ⇒ Object #canonicalize {|obj, parent| ... } ⇒ Object

Canonicalize a document and return the results. Takes an optional block that takes two parameters: the obj and that node’s parent. The obj will be either a Nokogiri::XML::Node, or a Nokogiri::XML::Namespace The block must return a non-nil, non-false value if the obj passed in should be included in the canonicalized document.

Overloads:

  • #canonicalize {|obj, parent| ... } ⇒ Object

    Yields:



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# File 'ext/nokogiri/xml_document.c', line 600

static VALUE
rb_xml_document_canonicalize(int argc, VALUE *argv, VALUE self)
{
  VALUE rb_mode;
  VALUE rb_namespaces;
  VALUE rb_comments_p;
  int c_mode = 0;
  xmlChar **c_namespaces;

  xmlDocPtr c_doc;
  xmlOutputBufferPtr c_obuf;
  xmlC14NIsVisibleCallback c_callback_wrapper = NULL;
  void *rb_callback = NULL;

  VALUE rb_cStringIO;
  VALUE rb_io;

  rb_scan_args(argc, argv, "03", &rb_mode, &rb_namespaces, &rb_comments_p);
  if (!NIL_P(rb_mode)) {
    Check_Type(rb_mode, T_FIXNUM);
    c_mode = NUM2INT(rb_mode);
  }
  if (!NIL_P(rb_namespaces)) {
    Check_Type(rb_namespaces, T_ARRAY);
    if (c_mode == XML_C14N_1_0 || c_mode == XML_C14N_1_1) {
      rb_raise(rb_eRuntimeError, "This canonicalizer does not support this operation");
    }
  }

  c_doc = noko_xml_document_unwrap(self);

  rb_cStringIO = rb_const_get_at(rb_cObject, rb_intern("StringIO"));
  rb_io = rb_class_new_instance(0, 0, rb_cStringIO);
  c_obuf = xmlAllocOutputBuffer(NULL);

  c_obuf->writecallback = (xmlOutputWriteCallback)noko_io_write;
  c_obuf->closecallback = (xmlOutputCloseCallback)noko_io_close;
  c_obuf->context = (void *)rb_io;

  if (rb_block_given_p()) {
    c_callback_wrapper = block_caller;
    rb_callback = (void *)rb_block_proc();
  }

  if (NIL_P(rb_namespaces)) {
    c_namespaces = NULL;
  } else {
    long ns_len = RARRAY_LEN(rb_namespaces);
    c_namespaces = ruby_xcalloc((size_t)ns_len + 1, sizeof(xmlChar *));
    for (int j = 0 ; j < ns_len ; j++) {
      VALUE entry = rb_ary_entry(rb_namespaces, j);
      c_namespaces[j] = (xmlChar *)StringValueCStr(entry);
    }
  }

  xmlC14NExecute(c_doc, c_callback_wrapper, rb_callback,
                 c_mode,
                 c_namespaces,
                 (int)RTEST(rb_comments_p),
                 c_obuf);

  ruby_xfree(c_namespaces);
  xmlOutputBufferClose(c_obuf);

  return rb_funcall(rb_io, rb_intern("string"), 0);
}

#clone(level = 1) ⇒ Object

:call-seq:

clone → Nokogiri::XML::Document
clone(level) → Nokogiri::XML::Document

Clone this node.

Parameters

  • level (optional Integer). 0 is a shallow copy, 1 (the default) is a deep copy.

Returns

The new Nokogiri::XML::Document



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# File 'lib/nokogiri/xml/document.rb', line 223

def clone(level = 1)
  copy = OBJECT_CLONE_METHOD.bind_call(self)
  copy.initialize_copy_with_args(self, level)
end

#collect_namespaces ⇒ Object

:call-seq:

collect_namespaces() → Hash<String(Namespace#prefix) ⇒ String(Namespace#href)>

Recursively get all namespaces from this node and its subtree and return them as a hash.

⚠ This method will not handle duplicate namespace prefixes, since the return value is a hash.

Note that this method does an xpath lookup for nodes with namespaces, and as a result the order (and which duplicate prefix “wins”) may be dependent on the implementation of the underlying XML library.

Example: Basic usage

Given this document:

<root xmlns="default" xmlns:foo="bar">
  <bar xmlns:hello="world" />
</root>

This method will return:

{"xmlns:foo"=>"bar", "xmlns"=>"default", "xmlns:hello"=>"world"}

Example: Duplicate prefixes

Given this document:

<root xmlns:foo="bar">
  <bar xmlns:foo="baz" />
</root>

The hash returned will be something like:

{"xmlns:foo" => "baz"}



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# File 'lib/nokogiri/xml/document.rb', line 361

def collect_namespaces
  xpath("//namespace::*").each_with_object({}) do |ns, hash|
    hash[["xmlns", ns.prefix].compact.join(":")] = ns.href if ns.prefix != "xml"
  end
end

#create_cdata(string, &block) ⇒ Object

Create a CDATA Node containing string



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# File 'lib/nokogiri/xml/document.rb', line 306

def create_cdata(string, &block)
  Nokogiri::XML::CDATA.new(self, string.to_s, &block)
end

#create_comment(string, &block) ⇒ Object

Create a Comment Node containing string



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# File 'lib/nokogiri/xml/document.rb', line 311

def create_comment(string, &block)
  Nokogiri::XML::Comment.new(self, string.to_s, &block)
end

#create_element(name, *contents_or_attrs, &block) ⇒ Object

:call-seq:

create_element(name, *contents_or_attrs, &block) → Nokogiri::XML::Element

Create a new Element with ‘name` belonging to this document, optionally setting contents or attributes.

This method is not the most user-friendly option if your intention is to add a node to the document tree. Prefer one of the Nokogiri::XML::Node methods like Node#add_child, Node#add_next_sibling, Node#replace, etc. which will both create an element (or subtree) and place it in the document tree.

Arguments may be passed to initialize the element:

  • a Hash argument will be used to set attributes

  • a non-Hash object that responds to #to_s will be used to set the new node’s contents

A block may be passed to mutate the node.

Parameters

  • ‘name` (String)

  • ‘contents_or_attrs` (#to_s, Hash)

Yields

‘node` (Nokogiri::XML::Element)

Returns

Nokogiri::XML::Element

Example: An empty element without attributes

doc.create_element("div")
# => <div></div>

Example: An element with contents

doc.create_element("div", "contents")
# => <div>contents</div>

Example: An element with attributes

doc.create_element("div", {"class" => "container"})
# => <div class='container'></div>

Example: An element with contents and attributes

doc.create_element("div", "contents", {"class" => "container"})
# => <div class='container'>contents</div>

Example: Passing a block to mutate the element

doc.create_element("div") { |node| node["class"] = "blue" if before_noon? }



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# File 'lib/nokogiri/xml/document.rb', line 276

def create_element(name, *contents_or_attrs, &block)
  elm = Nokogiri::XML::Element.new(name, self, &block)
  contents_or_attrs.each do |arg|
    case arg
    when Hash
      arg.each do |k, v|
        key = k.to_s
        if key =~ NCNAME_RE
          ns_name = Regexp.last_match(1)
          elm.add_namespace_definition(ns_name, v)
        else
          elm[k.to_s] = v.to_s
        end
      end
    else
      elm.content = arg
    end
  end
  if (ns = elm.namespace_definitions.find { |n| n.prefix.nil? || (n.prefix == "") })
    elm.namespace = ns
  end
  elm
end

#create_entity(name, type, external_id, system_id, content) ⇒ Object

Create a new entity named name.

type is an integer representing the type of entity to be created, and it defaults to Nokogiri::XML::EntityDecl::INTERNAL_GENERAL. See the constants on Nokogiri::XML::EntityDecl for more information.

external_id, system_id, and content set the External ID, System ID, and content respectively. All of these parameters are optional.



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# File 'ext/nokogiri/xml_document.c', line 528

static VALUE
noko_xml_document__create_entity(int argc, VALUE *argv, VALUE rb_document)
{
  VALUE rb_name;
  VALUE rb_type;
  VALUE rb_ext_id;
  VALUE rb_sys_id;
  VALUE rb_content;

  rb_scan_args(argc, argv, "14",
               &rb_name,
               &rb_type, &rb_ext_id, &rb_sys_id, &rb_content);

  xmlDocPtr c_document = noko_xml_document_unwrap(rb_document);

  libxmlStructuredErrorHandlerState handler_state;
  VALUE rb_errors = rb_ary_new();
  noko__structured_error_func_save_and_set(&handler_state, (void *)rb_errors, noko__error_array_pusher);

  xmlEntityPtr c_entity = xmlAddDocEntity(
                            c_document,
                            (xmlChar *)(NIL_P(rb_name) ? NULL : StringValueCStr(rb_name)),
                            (int)(NIL_P(rb_type) ? XML_INTERNAL_GENERAL_ENTITY : NUM2INT(rb_type)),
                            (xmlChar *)(NIL_P(rb_ext_id) ? NULL : StringValueCStr(rb_ext_id)),
                            (xmlChar *)(NIL_P(rb_sys_id) ? NULL : StringValueCStr(rb_sys_id)),
                            (xmlChar *)(NIL_P(rb_content) ? NULL : StringValueCStr(rb_content))
                          );

  noko__structured_error_func_restore(&handler_state);

  if (NULL == c_entity) {
    VALUE exception = rb_funcall(cNokogiriXmlSyntaxError, rb_intern("aggregate"), 1, rb_errors);
    if (RB_TEST(exception)) {
      rb_exc_raise(exception);
    } else {
      rb_raise(rb_eRuntimeError, "Could not create entity");
    }
  }

  return noko_xml_node_wrap(cNokogiriXmlEntityDecl, (xmlNodePtr)c_entity);
}

#create_text_node(string, &block) ⇒ Object

Create a Text Node with string



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# File 'lib/nokogiri/xml/document.rb', line 301

def create_text_node(string, &block)
  Nokogiri::XML::Text.new(string.to_s, self, &block)
end

#deconstruct_keys(keys) ⇒ Object

:call-seq: deconstruct_keys(array_of_names) → Hash

Returns a hash describing the Document, to use in pattern matching.

Valid keys and their values:
- +root+ → (Node, nil) The root node of the Document, or +nil+ if the document is empty.

In the future, other keys may allow accessing things like doctype and processing
instructions. If you have a use case and would like this functionality, please let us know
by opening an issue or a discussion on the github project.

*Example*

  doc = Nokogiri::XML.parse(<<~XML)
    <?xml version="1.0"?>
    <root>
      <child>
    </root>
  XML

  doc.deconstruct_keys([:root])
  # => {:root=>
  #      #(Element:0x35c {
  #        name = "root",
  #        children = [
  #          #(Text "\n" + "  "),
  #          #(Element:0x370 { name = "child", children = [ #(Text "\n")] }),
  #          #(Text "\n")]
  #        })}

*Example* of an empty document

  doc = Nokogiri::XML::Document.new

  doc.deconstruct_keys([:root])
  # => {:root=>nil}

Since v1.14.0



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# File 'lib/nokogiri/xml/document.rb', line 501

def deconstruct_keys(keys)
  { root: root }
end

#decorate(node) ⇒ Object

Apply any decorators to node



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# File 'lib/nokogiri/xml/document.rb', line 409

def decorate(node)
  return unless @decorators

  @decorators.each do |klass, list|
    next unless node.is_a?(klass)

    list.each { |mod| node.extend(mod) }
  end
end

#decorators(key) ⇒ Object

Get the list of decorators given key



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# File 'lib/nokogiri/xml/document.rb', line 368

def decorators(key)
  @decorators ||= {}
  @decorators[key] ||= []
end

#document ⇒ Object

A reference to self



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# File 'lib/nokogiri/xml/document.rb', line 321

def document
  self
end

#dup(level = 1) ⇒ Object

:call-seq:

dup → Nokogiri::XML::Document
dup(level) → Nokogiri::XML::Document

Duplicate this node.

Parameters

  • level (optional Integer). 0 is a shallow copy, 1 (the default) is a deep copy.

Returns

The new Nokogiri::XML::Document



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# File 'lib/nokogiri/xml/document.rb', line 207

def dup(level = 1)
  copy = OBJECT_DUP_METHOD.bind_call(self)
  copy.initialize_copy_with_args(self, level)
end

#encoding ⇒ Object

Get the encoding for this Document



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# File 'ext/nokogiri/xml_document.c', line 336

static VALUE
encoding(VALUE self)
{
  xmlDocPtr doc = noko_xml_document_unwrap(self);

  if (!doc->encoding) { return Qnil; }
  return NOKOGIRI_STR_NEW2(doc->encoding);
}

#encoding=(encoding) ⇒ Object

Set the encoding string for this Document



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# File 'ext/nokogiri/xml_document.c', line 316

static VALUE
set_encoding(VALUE self, VALUE encoding)
{
  xmlDocPtr doc = noko_xml_document_unwrap(self);

  if (doc->encoding) {
    xmlFree(DISCARD_CONST_QUAL_XMLCHAR(doc->encoding));
  }

  doc->encoding = xmlStrdup((xmlChar *)StringValueCStr(encoding));

  return encoding;
}

#fragment(tags = nil) ⇒ Object

Create a Nokogiri::XML::DocumentFragment from tags Returns an empty fragment if tags is nil.



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# File 'lib/nokogiri/xml/document.rb', line 429

def fragment(tags = nil)
  DocumentFragment.new(self, tags, root)
end

#name ⇒ Object

The name of this document. Always returns “document”



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# File 'lib/nokogiri/xml/document.rb', line 316

def name
  "document"
end

#namespaces ⇒ Object

Get the hash of namespaces on the root Nokogiri::XML::Node



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# File 'lib/nokogiri/xml/document.rb', line 422

def namespaces
  root ? root.namespaces : {}
end

#remove_namespaces! ⇒ Object

Remove all namespaces from all nodes in the document.

This could be useful for developers who either don’t understand namespaces or don’t care about them.

The following example shows a use case, and you can decide for yourself whether this is a good thing or not:

doc = Nokogiri::XML <<-EOXML
   <root>
     <car xmlns:part="http://general-motors.com/">
       <part:tire>Michelin Model XGV</part:tire>
     </car>
     <bicycle xmlns:part="http://schwinn.com/">
       <part:tire>I'm a bicycle tire!</part:tire>
     </bicycle>
   </root>
   EOXML

doc.xpath("//tire").to_s # => ""
doc.xpath("//part:tire", "part" => "http://general-motors.com/").to_s # => "<part:tire>Michelin Model XGV</part:tire>"
doc.xpath("//part:tire", "part" => "http://schwinn.com/").to_s # => "<part:tire>I'm a bicycle tire!</part:tire>"

doc.remove_namespaces!

doc.xpath("//tire").to_s # => "<tire>Michelin Model XGV</tire><tire>I'm a bicycle tire!</tire>"
doc.xpath("//part:tire", "part" => "http://general-motors.com/").to_s # => ""
doc.xpath("//part:tire", "part" => "http://schwinn.com/").to_s # => ""

For more information on why this probably is not a good thing in general, please direct your browser to tenderlovemaking.com/2009/04/23/namespaces-in-xml.html



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# File 'ext/nokogiri/xml_document.c', line 507

static VALUE
remove_namespaces_bang(VALUE self)
{
  xmlDocPtr doc = noko_xml_document_unwrap(self);

  recursively_remove_namespaces_from_node((xmlNodePtr)doc);
  return self;
}

#root ⇒ Object

Get the root node for this document.



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# File 'ext/nokogiri/xml_document.c', line 294

static VALUE
rb_xml_document_root(VALUE self)
{
  xmlDocPtr c_document;
  xmlNodePtr c_root;

  c_document = noko_xml_document_unwrap(self);

  c_root = xmlDocGetRootElement(c_document);
  if (!c_root) {
    return Qnil;
  }

  return noko_xml_node_wrap(Qnil, c_root) ;
}

#root= ⇒ Object

Set the root element on this document



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# File 'ext/nokogiri/xml_document.c', line 250

static VALUE
rb_xml_document_root_set(VALUE self, VALUE rb_new_root)
{
  xmlDocPtr c_document;
  xmlNodePtr c_new_root = NULL, c_current_root;

  c_document = noko_xml_document_unwrap(self);

  c_current_root = xmlDocGetRootElement(c_document);
  if (c_current_root) {
    xmlUnlinkNode(c_current_root);
    noko_xml_document_pin_node(c_current_root);
  }

  if (!NIL_P(rb_new_root)) {
    if (!rb_obj_is_kind_of(rb_new_root, cNokogiriXmlNode)) {
      rb_raise(rb_eArgError,
               "expected Nokogiri::XML::Node but received %"PRIsVALUE,
               rb_obj_class(rb_new_root));
    }

    Noko_Node_Get_Struct(rb_new_root, xmlNode, c_new_root);

    /* If the new root's document is not the same as the current document,
     * then we need to dup the node in to this document. */
    if (c_new_root->doc != c_document) {
      c_new_root = xmlDocCopyNode(c_new_root, c_document, 1);
      if (!c_new_root) {
        rb_raise(rb_eRuntimeError, "Could not reparent node (xmlDocCopyNode)");
      }
    }
  }

  xmlDocSetRootElement(c_document, c_new_root);

  return rb_new_root;
}

#slop! ⇒ Object

Explore a document with shortcut methods. See Nokogiri::Slop for details.

Note that any nodes that have been instantiated before #slop! is called will not be decorated with sloppy behavior. So, if you’re in irb, the preferred idiom is:

irb> doc = Nokogiri::Slop my_markup

and not

irb> doc = Nokogiri::HTML my_markup
... followed by irb's implicit inspect (and therefore instantiation of every node) ...
irb> doc.slop!
... which does absolutely nothing.



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# File 'lib/nokogiri/xml/document.rb', line 398

def slop!
  unless decorators(XML::Node).include?(Nokogiri::Decorators::Slop)
    decorators(XML::Node) << Nokogiri::Decorators::Slop
    decorate!
  end

  self
end

#url ⇒ Object

Get the url name for this document.



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# File 'ext/nokogiri/xml_document.c', line 234

static VALUE
url(VALUE self)
{
  xmlDocPtr doc = noko_xml_document_unwrap(self);

  if (doc->URL) { return NOKOGIRI_STR_NEW2(doc->URL); }

  return Qnil;
}

#validate ⇒ Object

Validate this Document against its DTD. Returns a list of errors on the document or nil when there is no DTD.



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# File 'lib/nokogiri/xml/document.rb', line 376

def validate
  return unless internal_subset

  internal_subset.validate(self)
end

#version ⇒ Object

Get the XML version for this Document



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# File 'ext/nokogiri/xml_document.c', line 351

static VALUE
version(VALUE self)
{
  xmlDocPtr doc = noko_xml_document_unwrap(self);

  if (!doc->version) { return Qnil; }
  return NOKOGIRI_STR_NEW2(doc->version);
}

#xpath_doctype ⇒ Object

:call-seq:

xpath_doctype() → Nokogiri::CSS::XPathVisitor::DoctypeConfig
Returns

The document type which determines CSS-to-XPath translation.

See XPathVisitor for more information.



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# File 'lib/nokogiri/xml/document.rb', line 457

def xpath_doctype
  Nokogiri::CSS::XPathVisitor::DoctypeConfig::XML
end