class RGL::DOT::Element


Ancestor of Edge, Node, and Graph.

def initialize(params = {}, option_list = []) 

def initialize(params = {}, option_list = [])
  @name = params['name'] ? params['name'] : nil
  @options = {}
  option_list.each do |i|
    @options[i] = params[i] if params[i]
  end
end

def quote_ID(id)


characters are escaped as necessary.
Returns the string given in _id_ within quotes if necessary. Special 
def quote_ID(id)
  # Ensure that the ID is a string.
  id = id.to_s
  # Return the ID verbatim if it looks like a name, a number, or HTML.
  return id if id =~ /\A([[:alpha:]_][[:alnum:]_]*|-?(\.[[:digit:]]+|[[:digit:]]+(\.[[:digit:]]*)?)|<.*>)\Z/m && id[-1] != ?\n
  # Return a quoted version of the ID otherwise.
  '"' + id.gsub('\\', '\\\\\\\\').gsub('"', '\\\\"') + '"'
end

def quote_label(label)


into the new string verbatim.
order to handle embedded *\n*, *\r*, and *\l* sequences which are copied
characters are escaped as necessary. Labels get special treatment in
Returns the string given in _label_ within quotes if necessary. Special 
def quote_label(label)
  # Ensure that the label is a string.
  label = label.to_s
  # Return the label verbatim if it looks like a name, a number, or HTML.
  return label if label =~ /\A([[:alpha:]_][[:alnum:]_]*|-?(\.[[:digit:]]+|[[:digit:]]+(\.[[:digit:]]*)?)|<.*>)\Z/m && label[-1] != ?\n
  # Return a quoted version of the label otherwise.
  '"' + label.split(/(\\n|\\r|\\l)/).collect do |part|
    case part
    when "\\n", "\\r", "\\l"
      part
    else
      part.gsub('\\', '\\\\\\\\').gsub('"', '\\\\"').gsub("\n", '\\n')
    end
  end.join + '"'
end