A parent has children, and has methods for accessing them. The Parent class is never encountered except as the superclass for some other object.
Fetches a child at a given index @param index the Integer index of the child to fetch
# File rexml/parent.rb, line 56 def []( index ) @children[index] end
Set an index entry. See Array.[]= @param index the index of the element to set @param opt either the object to set, or an Integer length @param child if opt is an Integer, this is the child to set @return the parent (self)
# File rexml/parent.rb, line 69 def []=( *args ) args[-1].parent = self @children[*args[0..-2]] = args[-1] end
# File rexml/parent.rb, line 17 def add( object ) object.parent = self @children << object object end
Deeply clones this object. This creates a complete duplicate of this Parent, including all descendants.
# File rexml/parent.rb, line 147 def deep_clone cl = clone() each do |child| if child.kind_of? Parent cl << child.deep_clone else cl << child.clone end end cl end
# File rexml/parent.rb, line 31 def delete( object ) found = false @children.delete_if {|c| c.equal?(object) and found = true } object.parent = nil if found found ? object : nil end
# File rexml/parent.rb, line 46 def delete_at( index ) @children.delete_at index end
# File rexml/parent.rb, line 42 def delete_if( &block ) @children.delete_if(&block) end
# File rexml/parent.rb, line 38 def each(&block) @children.each(&block) end
# File rexml/parent.rb, line 50 def each_index( &block ) @children.each_index(&block) end
Fetches the index of a given child @param child the child to get the index of @return the index of the child, or nil if the object is not a child of this parent.
# File rexml/parent.rb, line 122 def index( child ) count = -1 @children.find { |i| count += 1 ; i.hash == child.hash } count end
Inserts an child after another child @param child1 this is either an xpath or an Element. If an Element, child2 will be inserted after child1 in the child list of the parent. If an xpath, child2 will be inserted after the first child to match the xpath. @param child2 the child to insert @return the parent (self)
# File rexml/parent.rb, line 101 def insert_after( child1, child2 ) if child1.kind_of? String child1 = XPath.first( self, child1 ) child1.parent.insert_after child1, child2 else ind = index(child1)+1 child2.parent.delete(child2) if child2.parent @children[ind,0] = child2 child2.parent = self end self end
Inserts an child before another child @param child1 this is either an xpath or an Element. If an Element, child2 will be inserted before child1 in the child list of the parent. If an xpath, child2 will be inserted before the first child to match the xpath. @param child2 the child to insert @return the parent (self)
# File rexml/parent.rb, line 81 def insert_before( child1, child2 ) if child1.kind_of? String child1 = XPath.first( self, child1 ) child1.parent.insert_before child1, child2 else ind = index(child1) child2.parent.delete(child2) if child2.parent @children[ind,0] = child2 child2.parent = self end self end
Replaces one child with another, making sure the nodelist is correct @param to_replace the child to replace (must be a Child) @param replacement the child to insert into the nodelist (must be a Child)
# File rexml/parent.rb, line 139 def replace_child( to_replace, replacement ) @children.map! {|c| c.equal?( to_replace ) ? replacement : c } to_replace.parent = nil replacement.parent = self end
@return the number of children of this parent
# File rexml/parent.rb, line 129 def size @children.size end
# File rexml/parent.rb, line 114 def to_a @children.dup end