class REXML::Child

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.

Attributes

parent[R]

Public Class Methods

new( parent = nil ) click to toggle source

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

# 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

Public Instance Methods

bytes() click to toggle source

This doesn’t yet handle encodings

# File lib/rexml/child.rb, line 91
def bytes
  document.encoding

  to_s
end

document() click to toggle source

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

belongs to no document

# File lib/rexml/child.rb, line 85
def document
  return parent.document unless parent.nil?
  nil
end

next_sibling=( other ) click to toggle source

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>

# File lib/rexml/child.rb, line 68
def next_sibling=( other )
  parent.insert_after self, other
end

parent=( other ) click to toggle source

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

# 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=(other) click to toggle source

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>

# File lib/rexml/child.rb, line 79
def previous_sibling=(other)
  parent.insert_before self, other
end

remove() click to toggle source

Removes this child from the parent.

Returns: self

# File lib/rexml/child.rb, line 37
def remove
  unless @parent.nil?
    @parent.delete self
  end
  self
end

replace_with( child ) click to toggle source

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

Returns: self

# File lib/rexml/child.rb, line 29
def replace_with( child )
  @parent.replace_child( self, child )
  self
end