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Edit File : child.rb \| Size : 2.66 KB
# frozen_string_literal: false require_relative "node" module REXML ## # 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 Child include Node attr_reader :parent # The Parent of this object # 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 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 # Replaces this object with another object. Basically, calls # Parent.replace_child # # Returns:: self def replace_with( child ) @parent.replace_child( self, child ) self end # Removes this child from the parent. # # Returns:: self def remove unless @parent.nil? @parent.delete self end self end # 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 def parent=( other ) return @parent if @parent == other @parent.delete self if defined? @parent and @parent @parent = other end alias :next_sibling :next_sibling_node alias :previous_sibling :previous_sibling_node # 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> def next_sibling=( other ) parent.insert_after self, other end # 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> def previous_sibling=(other) parent.insert_before self, other end # Returns:: the document this child belongs to, or nil if this child # belongs to no document def document return parent.document unless parent.nil? nil end # This doesn't yet handle encodings def bytes document.encoding to_s end end end Back

Edit File : child.rb | Size : 2.66 KB

# frozen_string_literal: false
require_relative "node"

module REXML
  ##
  # 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 Child
    include Node
    attr_reader :parent         # The Parent of this object

# 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
    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

# Replaces this object with another object.  Basically, calls
    # Parent.replace_child
    #
    # Returns:: self
    def replace_with( child )
      @parent.replace_child( self, child )
      self
    end

# Removes this child from the parent.
    #
    # Returns:: self
    def remove
      unless @parent.nil?
        @parent.delete self
      end
      self
    end

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

alias :next_sibling :next_sibling_node
    alias :previous_sibling :previous_sibling_node

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

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

# Returns:: the document this child belongs to, or nil if this child
    # belongs to no document
    def document
      return parent.document unless parent.nil?
      nil
    end

# This doesn't yet handle encodings
    def bytes
      document.encoding

to_s
    end
  end
end

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