class Nokogiri::XML::NodeSet

A NodeSet contains a list of Nokogiri::XML::Node objects. Typically a NodeSet is return as a result of searching a Document via Nokogiri::XML::Searchable#css or Nokogiri::XML::Searchable#xpath

Attributes

document[RW]

The Document this NodeSet is associated with

Public Class Methods

new(document, list = []) { |self| ... } click to toggle source

Create a NodeSet with document defaulting to list

# File lib/nokogiri/xml/node_set.rb, line 15
def initialize document, list = []
  @document = document
  document.decorate(self)
  list.each { |x| self << x }
  yield self if block_given?
end

Public Instance Methods

%(*args)
Alias for: at
&(node_set) click to toggle source

Set Intersection — Returns a new NodeSet containing nodes common to the two NodeSets.

static VALUE intersection(VALUE self, VALUE rb_other)
{
  nokogiriNodeSetTuple *tuple, *other;
  xmlNodeSetPtr intersection;

  if(!rb_obj_is_kind_of(rb_other, cNokogiriXmlNodeSet))
    rb_raise(rb_eArgError, "node_set must be a Nokogiri::XML::NodeSet");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_other, nokogiriNodeSetTuple, other);

  intersection = xmlXPathIntersection(tuple->node_set, other->node_set);
  return Nokogiri_wrap_xml_node_set(intersection, rb_iv_get(self, "@document"));
}
+(p1)
Alias for: |
-(node_set) click to toggle source

Difference - returns a new NodeSet that is a copy of this NodeSet, removing each item that also appears in node_set

static VALUE minus(VALUE self, VALUE rb_other)
{
  nokogiriNodeSetTuple *tuple, *other;
  xmlNodeSetPtr new;
  int j ;

  if(!rb_obj_is_kind_of(rb_other, cNokogiriXmlNodeSet))
    rb_raise(rb_eArgError, "node_set must be a Nokogiri::XML::NodeSet");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_other, nokogiriNodeSetTuple, other);

  new = xmlXPathNodeSetMerge(NULL, tuple->node_set);
  for (j = 0 ; j < other->node_set->nodeNr ; ++j) {
    xmlXPathNodeSetDel(new, other->node_set->nodeTab[j]);
  }

  return Nokogiri_wrap_xml_node_set(new, rb_iv_get(self, "@document"));
}
<<(p1)
Alias for: push
==(other) click to toggle source

Equality – Two NodeSets are equal if the contain the same number of elements and if each element is equal to the corresponding element in the other NodeSet

# File lib/nokogiri/xml/node_set.rb, line 269
def == other
  return false unless other.is_a?(Nokogiri::XML::NodeSet)
  return false unless length == other.length
  each_with_index do |node, i|
    return false unless node == other[i]
  end
  true
end
>(selector) click to toggle source

Search this NodeSet's nodes' immediate children using CSS selector selector

# File lib/nokogiri/xml/node_set.rb, line 97
def > selector
  ns = document.root.namespaces
  xpath CSS.xpath_for(selector, :prefix => "./", :ns => ns).first
end
[index] → Node or nil click to toggle source
[start, length] → NodeSet or nil
[range] → NodeSet or nil

Element reference - returns the node at index, or returns a NodeSet containing nodes starting at start and continuing for length elements, or returns a NodeSet containing nodes specified by range. Negative indices count backward from the end of the node_set (-1 is the last node). Returns nil if the index (or start) are out of range.

static VALUE slice(int argc, VALUE *argv, VALUE self)
{
  VALUE arg ;
  long beg, len ;
  xmlNodeSetPtr node_set;
  nokogiriNodeSetTuple *tuple;
  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  node_set = tuple->node_set;

  if (argc == 2) {
    beg = NUM2LONG(argv[0]);
    len = NUM2LONG(argv[1]);
    if (beg < 0) {
      beg += node_set->nodeNr ;
    }
    return subseq(self, beg, len);
  }

  if (argc != 1) {
    rb_scan_args(argc, argv, "11", NULL, NULL);
  }
  arg = argv[0];

  if (FIXNUM_P(arg)) {
    return index_at(self, FIX2LONG(arg));
  }
  
  /* if arg is Range */
  switch (rb_range_beg_len(arg, &beg, &len, (long)node_set->nodeNr, 0)) {
  case Qfalse:
    break;
  case Qnil:
    return Qnil;
  default:
    return subseq(self, beg, len);
  }

  return index_at(self, NUM2LONG(arg));
}
add_class(name) click to toggle source

Append the class attribute name to all Node objects in the NodeSet.

# File lib/nokogiri/xml/node_set.rb, line 131
def add_class name
  each do |el|
    classes = el['class'].to_s.split(/\s+/)
    el['class'] = classes.push(name).uniq.join " "
  end
  self
end
after(datum) click to toggle source

Insert datum after the last Node in this NodeSet

# File lib/nokogiri/xml/node_set.rb, line 58
def after datum
  last.after datum
end
search *paths, [namespace-bindings, xpath-variable-bindings, custom-handler-class] click to toggle source

Search this object for paths, and return only the first result. paths must be one or more XPath or CSS queries.

See Nokogiri::XML::Searchable#search for more information.

Or, if passed an integer, index into the NodeSet:

node_set.at(3) # same as node_set[3]
Calls superclass method Nokogiri::XML::Searchable#at
# File lib/nokogiri/xml/node_set.rb, line 114
def at *args
  if args.length == 1 && args.first.is_a?(Numeric)
    return self[args.first]
  end

  super(*args)
end
Also aliased as: %
attr(key, value = nil, &blk) click to toggle source

Set the attribute key to value or the return value of blk on all Node objects in the NodeSet.

# File lib/nokogiri/xml/node_set.rb, line 162
def attr key, value = nil, &blk
  unless Hash === key || key && (value || blk)
    return first.attribute(key)
  end

  hash = key.is_a?(Hash) ? key : { key => value }

  hash.each { |k,v| each { |el| el[k] = v || blk[el] } }

  self
end
Also aliased as: set, attribute
attribute(key, value = nil, &blk)
Alias for: attr
before(datum) click to toggle source

Insert datum before the first Node in this NodeSet

# File lib/nokogiri/xml/node_set.rb, line 52
def before datum
  first.before datum
end
children() click to toggle source

Returns a new NodeSet containing all the children of all the nodes in the NodeSet

# File lib/nokogiri/xml/node_set.rb, line 281
def children
  inject(NodeSet.new(document)) { |set, node| set += node.children }
end
css *rules, [namespace-bindings, custom-pseudo-class] click to toggle source

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

For more information see Nokogiri::XML::Searchable#css

# File lib/nokogiri/xml/node_set.rb, line 72
def css *args
  rules, handler, ns, _ = extract_params(args)

  inject(NodeSet.new(document)) do |set, node|
    set += css_internal node, rules, handler, ns
  end
end
delete(node) click to toggle source

Delete node from the Nodeset, if it is a member. Returns the deleted node if found, otherwise returns nil.

static VALUE
delete(VALUE self, VALUE rb_node)
{
    nokogiriNodeSetTuple *tuple;
    xmlNodePtr node;
    xmlNodeSetPtr cur;
    int i;

    if (!(rb_obj_is_kind_of(rb_node, cNokogiriXmlNode) || rb_obj_is_kind_of(rb_node, cNokogiriXmlNamespace)))
        rb_raise(rb_eArgError, "node must be a Nokogiri::XML::Node or Nokogiri::XML::Namespace");

    Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
    Data_Get_Struct(rb_node, xmlNode, node);
    cur = tuple->node_set;

    if (xmlXPathNodeSetContains(cur, node)) {
        for (i = 0; i < cur->nodeNr; i++)
            if (cur->nodeTab[i] == node) break;

        cur->nodeNr--;
        for (;i < cur->nodeNr;i++)
            cur->nodeTab[i] = cur->nodeTab[i + 1];
        cur->nodeTab[cur->nodeNr] = NULL;
        return rb_node;
    }
    return Qnil ;
}
dup click to toggle source

Duplicate this node set

static VALUE duplicate(VALUE self)
{
  nokogiriNodeSetTuple *tuple;
  xmlNodeSetPtr dupl;

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);

  dupl = xmlXPathNodeSetMerge(NULL, tuple->node_set);

  return Nokogiri_wrap_xml_node_set(dupl, rb_iv_get(self, "@document"));
}
each() { |self| ... } click to toggle source

Iterate over each node, yielding to block

# File lib/nokogiri/xml/node_set.rb, line 185
def each(&block)
  0.upto(length - 1) do |x|
    yield self[x]
  end
end
empty?() click to toggle source

Is this NodeSet empty?

# File lib/nokogiri/xml/node_set.rb, line 39
def empty?
  length == 0
end
filter(expr) click to toggle source

Filter this list for nodes that match expr

# File lib/nokogiri/xml/node_set.rb, line 125
def filter expr
  find_all { |node| node.matches?(expr) }
end
first(n = nil) click to toggle source

Get the first element of the NodeSet.

# File lib/nokogiri/xml/node_set.rb, line 24
def first n = nil
  return self[0] unless n
  list = []
  n.times { |i| list << self[i] }
  list
end
include?(node) click to toggle source

Returns true if any member of node set equals node.

static VALUE include_eh(VALUE self, VALUE rb_node)
{
  nokogiriNodeSetTuple *tuple;
  xmlNodePtr node;

  if(!(rb_obj_is_kind_of(rb_node, cNokogiriXmlNode) || rb_obj_is_kind_of(rb_node, cNokogiriXmlNamespace)))
    rb_raise(rb_eArgError, "node must be a Nokogiri::XML::Node or Nokogiri::XML::Namespace");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_node, xmlNode, node);

  return (xmlXPathNodeSetContains(tuple->node_set, node) ? Qtrue : Qfalse);
}
index(node) click to toggle source

Returns the index of the first node in self that is == to node. Returns nil if no match is found.

# File lib/nokogiri/xml/node_set.rb, line 45
def index(node)
  each_with_index { |member, j| return j if member == node }
  nil
end
inner_html(*args) click to toggle source

Get the inner html of all contained Node objects

# File lib/nokogiri/xml/node_set.rb, line 200
def inner_html *args
  collect{|j| j.inner_html(*args) }.join('')
end
inner_text() click to toggle source

Get the inner text of all contained Node objects

# File lib/nokogiri/xml/node_set.rb, line 193
def inner_text
  collect{|j| j.inner_text}.join('')
end
Also aliased as: text
inspect() click to toggle source

Return a nicely formated string representation

# File lib/nokogiri/xml/node_set.rb, line 298
def inspect
  "[#{map { |c| c.inspect }.join ', '}]"
end
last() click to toggle source

Get the last element of the NodeSet.

# File lib/nokogiri/xml/node_set.rb, line 33
def last
  self[-1]
end
length click to toggle source

Get the length of the node set

static VALUE length(VALUE self)
{
  nokogiriNodeSetTuple *tuple;
  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);

  return tuple->node_set ? INT2NUM(tuple->node_set->nodeNr) : INT2NUM(0);
}
Also aliased as: size
pop() click to toggle source

Removes the last element from set and returns it, or nil if the set is empty

# File lib/nokogiri/xml/node_set.rb, line 252
def pop
  return nil if length == 0
  delete last
end
push(node) click to toggle source

Append node to the NodeSet.

static VALUE push(VALUE self, VALUE rb_node)
{
  nokogiriNodeSetTuple *tuple;
  xmlNodePtr node;

  if(!(rb_obj_is_kind_of(rb_node, cNokogiriXmlNode) || rb_obj_is_kind_of(rb_node, cNokogiriXmlNamespace)))
    rb_raise(rb_eArgError, "node must be a Nokogiri::XML::Node or Nokogiri::XML::Namespace");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_node, xmlNode, node);
  xmlXPathNodeSetAdd(tuple->node_set, node);
  return self;
}
Also aliased as: <<
remove()
Alias for: unlink
remove_attr(name) click to toggle source

Remove the attributed named name from all Node objects in the NodeSet

# File lib/nokogiri/xml/node_set.rb, line 178
def remove_attr name
  each { |el| el.delete name }
  self
end
remove_class(name = nil) click to toggle source

Remove the class attribute name from all Node objects in the NodeSet. If name is nil, remove the class attribute from all Nodes in the NodeSet.

# File lib/nokogiri/xml/node_set.rb, line 143
def remove_class name = nil
  each do |el|
    if name
      classes = el['class'].to_s.split(/\s+/)
      if classes.empty?
        el.delete 'class'
      else
        el['class'] = (classes - [name]).uniq.join " "
      end
    else
      el.delete "class"
    end
  end
  self
end
reverse() click to toggle source

Returns a new NodeSet containing all the nodes in the NodeSet in reverse order

# File lib/nokogiri/xml/node_set.rb, line 288
def reverse
  node_set = NodeSet.new(document)
  (length - 1).downto(0) do |x|
    node_set.push self[x]
  end
  node_set
end
set(key, value = nil, &blk)
Alias for: attr
shift() click to toggle source

Returns the first element of the NodeSet and removes it. Returns nil if the set is empty.

# File lib/nokogiri/xml/node_set.rb, line 260
def shift
  return nil if length == 0
  delete first
end
size()
Alias for: length
slice(index) → Node or nil click to toggle source
slice(start, length) → NodeSet or nil
slice(range) → NodeSet or nil

Element reference - returns the node at index, or returns a NodeSet containing nodes starting at start and continuing for length elements, or returns a NodeSet containing nodes specified by range. Negative indices count backward from the end of the node_set (-1 is the last node). Returns nil if the index (or start) are out of range.

static VALUE slice(int argc, VALUE *argv, VALUE self)
{
  VALUE arg ;
  long beg, len ;
  xmlNodeSetPtr node_set;
  nokogiriNodeSetTuple *tuple;
  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  node_set = tuple->node_set;

  if (argc == 2) {
    beg = NUM2LONG(argv[0]);
    len = NUM2LONG(argv[1]);
    if (beg < 0) {
      beg += node_set->nodeNr ;
    }
    return subseq(self, beg, len);
  }

  if (argc != 1) {
    rb_scan_args(argc, argv, "11", NULL, NULL);
  }
  arg = argv[0];

  if (FIXNUM_P(arg)) {
    return index_at(self, FIX2LONG(arg));
  }
  
  /* if arg is Range */
  switch (rb_range_beg_len(arg, &beg, &len, (long)node_set->nodeNr, 0)) {
  case Qfalse:
    break;
  case Qnil:
    return Qnil;
  default:
    return subseq(self, beg, len);
  }

  return index_at(self, NUM2LONG(arg));
}
text()
Alias for: inner_text
to_a click to toggle source

Return this list as an Array

static VALUE to_array(VALUE self, VALUE rb_node)
{
  xmlNodeSetPtr set;
  VALUE *elts;
  VALUE list;
  int i;
  nokogiriNodeSetTuple *tuple;

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  set = tuple->node_set;

  elts = calloc((size_t)set->nodeNr, sizeof(VALUE *));
  for(i = 0; i < set->nodeNr; i++) {
    if (XML_NAMESPACE_DECL == set->nodeTab[i]->type)
      elts[i] = Nokogiri_wrap_xml_namespace2(rb_iv_get(self, "@document"), (xmlNsPtr)(set->nodeTab[i]));
    else
      elts[i] = Nokogiri_wrap_xml_node(Qnil, set->nodeTab[i]);
  }

  list = rb_ary_new4((long)set->nodeNr, elts);

  /*free(elts); */

  return list;
}
Also aliased as: to_ary
to_ary()
Alias for: to_a
to_html(*args) click to toggle source

Convert this NodeSet to HTML

# File lib/nokogiri/xml/node_set.rb, line 223
def to_html *args
  if Nokogiri.jruby?
    options = args.first.is_a?(Hash) ? args.shift : {}
    if !options[:save_with]
      options[:save_with] = Node::SaveOptions::NO_DECLARATION | Node::SaveOptions::NO_EMPTY_TAGS | Node::SaveOptions::AS_HTML
    end
    args.insert(0, options)
  end
  map { |x| x.to_html(*args) }.join
end
to_s() click to toggle source

Convert this NodeSet to a string.

# File lib/nokogiri/xml/node_set.rb, line 217
def to_s
  map { |x| x.to_s }.join
end
to_xhtml(*args) click to toggle source

Convert this NodeSet to XHTML

# File lib/nokogiri/xml/node_set.rb, line 236
def to_xhtml *args
  map { |x| x.to_xhtml(*args) }.join
end
to_xml(*args) click to toggle source

Convert this NodeSet to XML

# File lib/nokogiri/xml/node_set.rb, line 242
def to_xml *args
  map { |x| x.to_xml(*args) }.join
end
wrap(html, &blk) click to toggle source

Wrap this NodeSet with html or the results of the builder in blk

# File lib/nokogiri/xml/node_set.rb, line 206
def wrap(html, &blk)
  each do |j|
    new_parent = document.parse(html).first
    j.add_next_sibling(new_parent)
    new_parent.add_child(j)
  end
  self
end
xpath *paths, [namespace-bindings, variable-bindings, custom-handler-class] click to toggle source

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

For more information see Nokogiri::XML::Searchable#xpath

# File lib/nokogiri/xml/node_set.rb, line 87
def xpath *args
  paths, handler, ns, binds = extract_params(args)

  inject(NodeSet.new(document)) do |set, node|
    set += node.xpath(*(paths + [ns, handler, binds].compact))
  end
end
|(node_set) click to toggle source

Returns a new set built by merging the set and the elements of the given set.

static VALUE set_union(VALUE self, VALUE rb_other)
{
  nokogiriNodeSetTuple *tuple, *other;
  xmlNodeSetPtr new;

  if(!rb_obj_is_kind_of(rb_other, cNokogiriXmlNodeSet))
    rb_raise(rb_eArgError, "node_set must be a Nokogiri::XML::NodeSet");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_other, nokogiriNodeSetTuple, other);

  new = xmlXPathNodeSetMerge(NULL, tuple->node_set);
  new = xmlXPathNodeSetMerge(new, other->node_set);

  return Nokogiri_wrap_xml_node_set(new, rb_iv_get(self, "@document"));
}
Also aliased as: +