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require "rexml/parseexception"
require "rexml/formatters/pretty"
require "rexml/formatters/default"
module REXML
# Represents a node in the tree. Nodes are never encountered except as
# superclasses of other objects. Nodes have siblings.
module Node
# @return the next sibling (nil if unset)
def next_sibling_node
return nil if @parent.nil?
@parent[ @parent.index(self) + 1 ]
end
# @return the previous sibling (nil if unset)
def previous_sibling_node
return nil if @parent.nil?
ind = @parent.index(self)
return nil if ind == 0
@parent[ ind - 1 ]
end
# indent::
# *DEPRECATED* This parameter is now ignored. See the formatters in the
# REXML::Formatters package for changing the output style.
def to_s indent=nil
unless indent.nil?
Kernel.warn( "#{self.class.name}.to_s(indent) parameter is deprecated" )
f = REXML::Formatters::Pretty.new( indent )
f.write( self, rv = "" )
else
f = REXML::Formatters::Default.new
f.write( self, rv = "" )
end
return rv
end
def indent to, ind
if @parent and @parent.context and not @parent.context[:indentstyle].nil? then
indentstyle = @parent.context[:indentstyle]
else
indentstyle = ' '
end
to << indentstyle*ind unless ind<1
end
def parent?
false;
end
# Visit all subnodes of +self+ recursively
def each_recursive(&block) # :yields: node
self.elements.each {|node|
block.call(node)
node.each_recursive(&block)
}
end
# Find (and return) first subnode (recursively) for which the block
# evaluates to true. Returns +nil+ if none was found.
def find_first_recursive(&block) # :yields: node
each_recursive {|node|
return node if block.call(node)
}
return nil
end
# Returns the position that +self+ holds in its parent's array, indexed
# from 1.
def index_in_parent
parent.index(self)+1
end
end
end
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