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Class: REXML::Child

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
AttlistDecl, CData, Comment, Declaration, DocType, Document, Element, ElementDecl, Entity, ExternalEntity, Instruction, NotationDecl, Parent, Text, XMLDecl, DTD::AttlistDecl, DTD::ElementDecl, DTD::EntityDecl, DTD::NotationDecl
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, Node
Inherits: Object
Defined in: lib/rexml/child.rb

Overview

A Child object is something contained by a parent, and this class contains methods to support that. Most user code will not use this class directly.

Class Method Summary

Instance Attribute Summary

Node - Included

#parent?

Instance Method Summary

  • #bytes

    This doesn’t yet handle encodings.

  • #document
    Returns

    the document this child belongs to, or nil if this child belongs to no document.

  • #remove

    Removes this child from the parent.

  • #replace_with(child)

    Replaces this object with another object.

Node - Included

#each_recursive

Visit all subnodes of self recursively.
#find_first_recursive

Find (and return) first subnode (recursively) for which the block evaluates to true.
#indent,
#index_in_parent

Returns the position that self holds in its parent’s array, indexed from 1.
#next_sibling_node, #previous_sibling_node,
#to_s
indent

Constructor Details

.new(parent = nil) ⇒ Child

Constructor. Any inheritors of this class should call super to make sure this method is called.

parent

if supplied, the parent of this child will be set to the supplied value, and self will be added to the parent

[ GitHub ] 

  


# File 'lib/rexml/child.rb', line 18



def initialize( parent = nil )
  @parent = nil
  # Declare @parent, but don't define it.  The next line sets the
  # parent.
  parent.add( self ) if parent
end


  







Instance Attribute Details



  

    #next_sibling   (rw)
  



  

    

Alias for Node#next_sibling_node.


  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 58



alias :next_sibling :next_sibling_node


  








  

    #next_sibling=(other)   (rw)
  



  

    

Sets the next sibling of this child.  This can be used to insert a child after some other child.



a = Element.new("a")
b = a.add_element("b")
c = Element.new("c")
b.next_sibling = c
# => <a><b/><c/></a>


  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 68



def next_sibling=( other )
  parent.insert_after self, other
end


  








  

    #parent   (rw)
  



  

    

The Parent of this object


  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 11



attr_reader :parent         # The Parent of this object


  








  

    #parent=(other)   (rw)
  



  

    

Sets the parent of this child to the supplied argument.


other



Must be a Parent object.  If this object is the same object as the existing parent of this child, no action is taken. Otherwise, this child is removed from the current parent (if one exists), and is added to the new parent.


Returns



The parent added




  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 52



def parent=( other )
  return @parent if @parent == other
  @parent.delete self if defined? @parent and @parent
  @parent = other
end


  








  

    #previous_sibling   (rw)
  



  

    

Alias for Node#previous_sibling_node.


  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 59



alias :previous_sibling :previous_sibling_node


  








  

    #previous_sibling=(other)   (rw)
  



  

    

Sets the previous sibling of this child.  This can be used to insert a child before some other child.



a = Element.new("a")
b = a.add_element("b")
c = Element.new("c")
b.previous_sibling = c
# => <a><b/><c/></a>


  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 79



def previous_sibling=(other)
  parent.insert_before self, other
end


  







Instance Method Details



  

    #bytes  
  



  

    

This doesn’t yet handle encodings


  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 91



def bytes
  document.encoding

  to_s
end


  








  

    #document  
  



  

    
Returns



the document this child belongs to, or nil if this child





belongs to no document


  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 85



def document
  return parent.document unless parent.nil?
  nil
end


  








  

    #remove  
  



  

    

Removes this child from the parent.


Returns



self




  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 37



def remove
  unless @parent.nil?
    @parent.delete self
  end
  self
end


  








  

    #replace_with(child)  
  



  

    

Replaces this object with another object.  Basically, calls Parent#replace_child


Returns



self




  



  [ GitHub ]


  

  


# File 'lib/rexml/child.rb', line 29



def replace_with( child )
  @parent.replace_child( self, child )
  self
end