Class: Nokolexbor::NodeSet

Inherits:
Node
  • Object
show all
Includes:
Enumerable
Defined in:
lib/nokolexbor/node_set.rb

Constant Summary

Constants inherited from Node

Nokolexbor::Node::ATTRIBUTE_NODE, Nokolexbor::Node::CDATA_SECTION_NODE, Nokolexbor::Node::COMMENT_NODE, Nokolexbor::Node::DOCUMENT_FRAG_NODE, Nokolexbor::Node::DOCUMENT_NODE, Nokolexbor::Node::DOCUMENT_TYPE_NODE, Nokolexbor::Node::ELEMENT_NODE, Nokolexbor::Node::ENTITY_NODE, Nokolexbor::Node::ENTITY_REF_NODE, Nokolexbor::Node::LOOKS_LIKE_XPATH, Nokolexbor::Node::NOTATION_NODE, Nokolexbor::Node::PI_NODE, Nokolexbor::Node::TEXT_NODE

Instance Attribute Summary

Attributes inherited from Node

#document

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Node

#<<, #add_next_sibling, #add_previous_sibling, #ancestors, #at, #at_css, #at_xpath, #attributes, #cdata?, #children=, #classes, #comment?, #css, #css_path, #document?, #element?, #fragment, #fragment?, #kwattr_add, #kwattr_append, #kwattr_remove, #kwattr_values, #matches?, #nokogiri_at_css, #parent=, #prepend_child, #processing_instruction?, #replace, #search, #swap, #text?, #traverse, #value?, #write_to

Class Method Details

.new(document, list = []) {|Document| ... } ⇒ Document

Create a NodeSet with document defaulting to list.

Yields:

Returns:



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# File 'lib/nokolexbor/node_set.rb', line 12

def self.new(document, list = [])
  obj = allocate
  obj.instance_variable_set(:@document, document)
  list.each { |x| obj << x }
  yield obj if block_given?
  obj
end

Instance Method Details

#==(other) ⇒ Boolean

Returns true if two NodeSets contain the same number of elements and each element is equal to the corresponding element in the other NodeSet.

Returns:

  • (Boolean) —

    true if two NodeSets contain the same number of elements and each element is equal to the corresponding element in the other NodeSet.



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# File 'lib/nokolexbor/node_set.rb', line 142

def ==(other)
  return false unless other.is_a?(NodeSet)
  return false unless length == other.length

  each_with_index do |node, i|
    return false unless node == other[i]
  end
  true
end

#add_class(name) ⇒ Object

Add the class attribute name to all containing nodes.

See Also:



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# File 'lib/nokolexbor/node_set.rb', line 185

def add_class(name)
  each do |el|
    el.add_class(name)
  end
  self
end

#after(node) ⇒ Object

Insert node after the last Node in this NodeSet



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# File 'lib/nokolexbor/node_set.rb', line 63

def after(node)
  last.after(node)
end

#append_class(name) ⇒ Object

Append the class attribute name to all containing nodes.

See Also:



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# File 'lib/nokolexbor/node_set.rb', line 195

def append_class(name)
  each do |el|
    el.append_class(name)
  end
  self
end

#attr(key, value = nil, &block) ⇒ NodeSet Also known as: set, attribute

Set attributes on each Node in the NodeSet, or get an attribute from the first Node in the NodeSet.

Examples:

Get an attribute from the first Node in a NodeSet.

node_set.attr("href")

Set attributes on each node.

node_set.attr("href" => "http://example.com", "class" => "a")
node_set.attr("href", "http://example.com")
node_set.attr("href") { |node| "http://example.com" }

Returns:

  • (NodeSet) —

    self, to support chaining of calls.



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# File 'lib/nokolexbor/node_set.rb', line 233

def attr(key, value = nil, &block)
  unless key.is_a?(Hash) || (key && (value || block))
    return first&.attribute(key)
  end

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

  hash.each do |k, v|
    each do |node|
      node[k] = v || yield(node)
    end
  end

  self
end

#before(node) ⇒ Object

Insert node before the first Node in this NodeSet



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# File 'lib/nokolexbor/node_set.rb', line 58

def before(node)
  first.before(node)
end

#children ⇒ NodeSet

Returns A new NodeSet containing all the children of all the nodes in the NodeSet.

Returns:

  • (NodeSet) —

    A new NodeSet containing all the children of all the nodes in the NodeSet.



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# File 'lib/nokolexbor/node_set.rb', line 154

def children
  node_set = NodeSet.new(@document)
  each do |node|
    node.children.each { |n| node_set.push(n) }
  end
  node_set
end

#content ⇒ String Also known as: text, inner_text, to_str

Get the content of all contained Nodes.

Returns:

  • (String) 


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# File 'lib/nokolexbor/node_set.rb', line 80

def content
  self.map(&:content).join
end

#destroy ⇒ Object

Destroy all nodes in the NodeSet.

See Also:

  • Node#destroy


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# File 'lib/nokolexbor/node_set.rb', line 119

def destroy
  self.each(&:destroy)
end

#each {|Node| ... } ⇒ Object

Iterate over each node.

Yields:



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# File 'lib/nokolexbor/node_set.rb', line 23

def each
  return to_enum unless block_given?

  0.upto(length - 1) do |x|
    yield self[x]
  end
  self
end

#empty? ⇒ Boolean

Returns true if this NodeSet is empty.

Returns:

  • (Boolean) —

    true if this NodeSet is empty.



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# File 'lib/nokolexbor/node_set.rb', line 53

def empty?
  length == 0
end

#first(n = nil) ⇒ Node+

Get the first n elements of the NodeSet.

Parameters:

  • n (Numeric, nil) (defaults to: nil)

Returns:



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# File 'lib/nokolexbor/node_set.rb', line 37

def first(n = nil)
  return self[0] unless n

  list = []
  [n, length].min.times { |i| list << self[i] }
  list
end

#index(node = nil) ⇒ Integer

Returns The index of the first node in this NodeSet that is equal to node or meets the given block. Returns nil if no match is found.

Returns:

  • (Integer) —

    The index of the first node in this NodeSet that is equal to node or meets the given block. Returns nil if no match is found.



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# File 'lib/nokolexbor/node_set.rb', line 68

def index(node = nil)
  if node
    each_with_index { |member, j| return j if member == node }
  elsif block_given?
    each_with_index { |member, j| return j if yield(member) }
  end
  nil
end

#inner_html(*args) ⇒ String

Get the inner html of all contained Nodes.

Returns:

  • (String) 


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# File 'lib/nokolexbor/node_set.rb', line 91

def inner_html(*args)
  self.map { |n| n.inner_html(*args) }.join
end

#inspect ⇒ Object 



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# File 'lib/nokolexbor/node_set.rb', line 278

def inspect
  "[#{map(&:inspect).join(', ')}]"
end

#last ⇒ Node?

Get the last element of the NodeSet.

Returns:



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# File 'lib/nokolexbor/node_set.rb', line 48

def last
  self[-1]
end

#nokogiri_css(*args) ⇒ NodeSet

Search this object for CSS rules. rules must be one or more CSS selectors. It supports a mixed syntax of CSS selectors and XPath.

This method uses libxml2 as the selector engine. It works the same way as Nokogiri::Node#css.

Returns:

  • (NodeSet) —

    The matched set of Nodes.

See Also:



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# File 'lib/nokolexbor/node_set.rb', line 265

def nokogiri_css(*args)
  rules, handler, ns, _ = extract_params(args)
  paths = css_rules_to_xpath(rules, ns)

  NodeSet.new(@document) do |set|
    each do |node|
      node.send(:xpath_internal, node, paths, handler, ns, nil).each do |inner_node|
        set << inner_node
      end
    end
  end
end

#outer_html(*args) ⇒ String Also known as: to_s, to_html, serialize

Convert this NodeSet to HTML.

Returns:

  • (String) 


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# File 'lib/nokolexbor/node_set.rb', line 98

def outer_html(*args)
  self.map { |n| n.outer_html(*args) }.join
end

#pop ⇒ Node?

Returns The last element of this NodeSet and removes it. Returns nil if the set is empty.

Returns:

  • (Node, nil) —

    The last element of this NodeSet and removes it. Returns nil if the set is empty.



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# File 'lib/nokolexbor/node_set.rb', line 125

def pop
  return nil if length == 0

  delete(last)
end

#remove ⇒ Object Also known as: unlink

Remove all nodes in this NodeSet.

See Also:

  • Node#remove


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# File 'lib/nokolexbor/node_set.rb', line 109

def remove
  self.each(&:remove)
end

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

Remove the attributed named name from all containing nodes.

See Also:

  • Node#remove_attr


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# File 'lib/nokolexbor/node_set.rb', line 215

def remove_attr(name)
  each { |el| el.delete(name) }
  self
end

#remove_class(name = nil) ⇒ Object

Remove the class attribute name from all containing nodes.

See Also:



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# File 'lib/nokolexbor/node_set.rb', line 205

def remove_class(name = nil)
  each do |el|
    el.remove_class(name)
  end
  self
end

#reverse ⇒ NodeSet

Returns A new NodeSet containing all the nodes in the NodeSet in reverse order.

Returns:

  • (NodeSet) —

    A new NodeSet containing all the nodes in the NodeSet in reverse order.



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# File 'lib/nokolexbor/node_set.rb', line 164

def reverse
  node_set = NodeSet.new(@document)
  (length - 1).downto(0) do |x|
    node_set.push(self[x])
  end
  node_set
end

#shift ⇒ Node?

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

Returns:

  • (Node, nil) —

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



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# File 'lib/nokolexbor/node_set.rb', line 133

def shift
  return nil if length == 0

  delete(first)
end

#wrap(node_or_tags) ⇒ NodeSet

Wrap all nodes of this NodeSet with node_or_tags.

Returns:

  • (NodeSet) —

    self, to support chaining.

See Also:



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# File 'lib/nokolexbor/node_set.rb', line 177

def wrap(node_or_tags)
  map { |node| node.wrap(node_or_tags) }
  self
end

#xpath(*args) ⇒ NodeSet

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

It works the same way as Nokogiri::Node#xpath.

Examples:

node.xpath('.//title')

Returns:

  • (NodeSet) —

    The matched set of Nodes.



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# File 'lib/nokolexbor/node_set.rb', line 252

def xpath(*args)
  paths, handler, ns, binds = extract_params(args)

  NodeSet.new(@document) do |set|
    each do |node|
      node.send(:xpath_internal, node, paths, handler, ns, binds).each do |inner_node|
        set << inner_node
      end
    end
  end
end