Method: Scrubyt::XPathUtils.generate_XPath

Defined in:
lib/scrubyt/utils/xpathutils.rb

.generate_XPath(node, stopnode = nil, write_indices = false) ⇒ Object

Generate XPath for the given node

parameters

node - The node we are looking up the XPath for

stopnode - The Xpath generation is stopped and the XPath that was generated so far is returned if this node is reached.

write_indices - whether the index inside the parent shuold be added, as in html/body/table/tr/td



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# File 'lib/scrubyt/utils/xpathutils.rb', line 35

def self.generate_XPath(node, stopnode=nil, write_indices=false)
  path = []
  indices = []
  found = false
  while !node.nil? && node.class != Hpricot::Doc do
    if node == stopnode
      found = true
      break
    end
    path.push node.name
    indices.push find_index(node) if write_indices
    node = node.parent
  end
  #This condition ensures that if there is a stopnode, and we did not found it along the way,
  #we return nil (since the stopnode is not contained in the path at all)
  return nil if stopnode != nil && !found
  result = ""
  if write_indices
    path.reverse.zip(indices.reverse).each { |node,index| result += "#{node}[#{index}]/" }
  else
    path.reverse.each{ |node| result += "#{node}/" }
  end
  "/" + result.chop
end