1  require 'rexml/formatters/pretty'
   2 
   3  module REXML
   4    module Formatters
   5      # The Transitive formatter writes an XML document that parses to an
   6      # identical document as the source document.  This means that no extra
   7      # whitespace nodes are inserted, and whitespace within text nodes is
   8      # preserved.  Within these constraints, the document is pretty-printed,
   9      # with whitespace inserted into the metadata to introduce formatting.
  10      #
  11      # Note that this is only useful if the original XML is not already
  12      # formatted.  Since this formatter does not alter whitespace nodes, the
  13      # results of formatting already formatted XML will be odd.
  14      class Transitive < Default
  15        def initialize( indentation=2 )
  16          @indentation = indentation
  17          @level = 0
  18        end
  19 
  20        protected
  21        def write_element( node, output )
  22          output << "<#{node.expanded_name}"
  23 
  24          node.attributes.each_attribute do |attr|
  25            output << " "
  26            attr.write( output )
  27          end unless node.attributes.empty?
  28 
  29          output << "\n"
  30          output << ' '*@level
  31          if node.children.empty?
  32            output << "/" 
  33          else
  34            output << ">"
  35            # If compact and all children are text, and if the formatted output
  36            # is less than the specified width, then try to print everything on
  37            # one line
  38            skip = false
  39            @level += @indentation
  40            node.children.each { |child|
  41              write( child, output )
  42            }
  43            @level -= @indentation
  44            output << "</#{node.expanded_name}"
  45            output << "\n"
  46            output << ' '*@level
  47          end
  48          output << ">"
  49        end
  50 
  51        def write_text( node, output )
  52          output << node.to_s()
  53        end
  54      end
  55    end
  56  end