$:.unshift File.dirname(__FILE__) require 'engine/nodes' begin require 'engine/parser' rescue LoadError Treetop.load File.join(LESS_GRAMMAR, 'less.tt') end module Less class Engine attr_reader :css, :less def initialize obj, options = {} @less = if obj.is_a? File @path = File.dirname File.expand_path(obj.path) obj.read elsif obj.is_a? String obj.dup else raise ArgumentError, "argument must be an instance of File or String!" end @options = options @parser = StyleSheetParser.new end def parse build = true, env = Node::Element.new root = @parser.parse(self.prepare) return root unless build if root env.file = @path @tree = root.build env else raise SyntaxError, @parser.failure_message(@options[:color]) end @tree end alias :to_tree :parse def to_css @css || @css = self.parse.group.to_css end def prepare @less.gsub(/\r\n/, "\n").gsub(/\t/, ' ') end end end