Contents

require 'xml/mapping/base'
class Length
	attr_accessor :value, :unit, :number
	
	def initialize(value)
		@value = value
		@number = value.match(/[\d\.]*/)[0].to_f
		@unit = value.delete("#{number}").strip
	end

	#Return the numeric portion as a Points	
	def as_pts
		if @unit =~ /pt/
			return @number
		elsif @unit =~ /in/
			return @number * 72 #72.270 
		elsif @unit =~ /mm/
			return @number * 2.83464566929134
		elsif @unit =~ /cm/
			return @number * 28.3464566929134
		elsif @unit =~ /pc/
			return 1.0 * @number / 12
		elsif @unit == ''
			return @number
		else
			raise "Unit #{unit} unknown"
		end
	end
end

class LengthNode < XML::Mapping::SingleAttributeNode
  def initialize_impl(path)
    @path = XML::XXPath.new(path)
  end

  def extract_attr_value(xml)
    @value = default_when_xpath_err{@path.first(xml).text}
		Length.new(@value)
  end

  def set_attr_value(xml, value)
    raise "Not a Length: #{value}" unless Length===value
    @path.first(xml,:ensure_created=>true).text = value.value
  end
end

XML::Mapping.add_node_class LengthNode

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
pdf-labels-1.0.0	lib/length_node.rb
pdf-labels-1.0.1	lib/length_node.rb