Revert "Move linking of child nodes to a dedicated mixin."

This doesn't actually make things any easier. It also introduces a weirdly
named mixin.

This reverts commit 0968465f0c.

lib/oga.rb

@@ -1,6 +1,5 @@
 require 'set'
 
-require_relative 'oga/xml/child_mixin'
 require_relative 'oga/xml/lexer'
 require_relative 'oga/xml/parser'
 require_relative 'oga/xml/node'

lib/oga/xml/child_mixin.rb

@@ -1,32 +0,0 @@
-module Oga
-  module XML
-    ##
-    # Mixin that can be used to link child nodes together with their parent,
-    # previous and next following.
-    #
-    module ChildMixin
-      ##
-      # Links child nodes together with each other and sets the parent node of
-      # each child.
-      #
-      def link_child_nodes
-        amount = children.length
-
-        children.each_with_index do |child, index|
-          prev_index = index - 1
-          next_index = index + 1
-
-          if index > 0
-            child.previous = children[prev_index]
-          end
-
-          if next_index <= amount
-            child.next = children[next_index]
-          end
-
-          child.parent = self
-        end
-      end
-    end # NodeHierarchy
-  end # XML
-end # Oga

lib/oga/xml/document.rb

@@ -17,8 +17,6 @@ module Oga
     #  @return [Oga::XML::XmlDeclaration]
     #
     class Document
-      include ChildMixin
-
       attr_accessor :children, :doctype, :xml_declaration
 
       ##
@@ -36,15 +34,6 @@ module Oga
         @children ||= []
       end
 
-      ##
-      # @param [Array] nodes
-      #
-      def children=(nodes)
-        @children = nodes
-
-        link_child_nodes
-      end
-
       ##
       # Converts the document and its child nodes to XML.
       #

lib/oga/xml/node.rb

@@ -17,8 +17,6 @@ module Oga
     #  @return [Oga::XML::Node]
     #
     class Node
-      include ChildMixin
-
       attr_accessor :parent, :children, :next, :previous
 
       ##
@@ -41,15 +39,6 @@ module Oga
         after_initialize if respond_to?(:after_initialize)
       end
 
-      ##
-      # @param [Array] nodes
-      #
-      def children=(nodes)
-        @children = nodes
-
-        link_child_nodes
-      end
-
       ##
       # Generates the inspect value for the current node. Sub classes can
       # overwrite the {#extra_inspect_data} method to customize the output

lib/oga/xml/parser.y

@@ -120,6 +120,8 @@ rule
 
         element.children = val[1].flatten
 
+        link_children(element)
+
         element
       }
     ;
@@ -285,8 +287,7 @@ Unexpected #{name} with value #{value.inspect} on line #{@line}:
       children = [children]
     end
 
-    document    = Document.new
+    document = Document.new
-    child_nodes = []
 
     children.each do |child|
       if child.is_a?(Doctype)
@@ -296,13 +297,38 @@ Unexpected #{name} with value #{value.inspect} on line #{@line}:
         document.xml_declaration = child
 
       else
-        child_nodes << child
+        document.children << child
       end
     end
 
-    document.children = child_nodes
+    link_children(document)
 
     return document
   end
 
+  ##
+  # Links the child nodes together by setting attributes such as the
+  # previous, next and parent node.
+  #
+  # @param [Oga::XML::Node] node
+  #
+  def link_children(node)
+    amount = node.children.length
+
+    node.children.each_with_index do |child, index|
+      prev_index = index - 1
+      next_index = index + 1
+
+      if index > 0
+        child.previous = node.children[prev_index]
+      end
+
+      if next_index <= amount
+        child.next = node.children[next_index]
+      end
+
+      child.parent = node
+    end
+  end
+
 # vim: set ft=racc: