lib/rgl/graphxml.rb in rgl-0.4.0 vs lib/rgl/graphxml.rb in rgl-0.5.0

@@ -1,9 +1,9 @@
 # graphxml.rb
 #
 # This file contains minimal support for creating RGL graphs from the GraphML
-# format (see http://www.graphdrawing.org/graphml).  The main purpose is to
+# format (see http://www.graphdrawing.org/graphml). The main purpose is to
 # have a rich set of example graphs to have some more tests.
 #
 # See the examples directory, which contains a subdirectory _north_ with the
 # Graph catalog GraphViz (see
 # http://www.research.att.com/sw/tools/graphviz/refs.html).
@@ -14,38 +14,48 @@
 require 'rgl/mutable'
 require 'rexml/document'
 require 'rexml/streamlistener'
 
 module RGL
+
   module MutableGraph
+
     # Used to parse a subset of GraphML into an RGL graph implementation.
+    #
     class MutableGraphParser
+
       include REXML::StreamListener
 
       # First resets +graph+ to be empty and stores a reference for use with
       # #tag_start.
-      def initialize (graph)
+      #
+      def initialize(graph)
         @graph = graph
         @graph.remove_vertices(@graph.vertices)
       end
 
       # Processes incoming edge and node elements from GraphML in order to
       # populate the graph given to #new.
-      def tag_start (name, attrs)
+      #
+      def tag_start(name, attrs)
         case name
-        when 'edge'
-          @graph.add_edge(attrs['source'], attrs['target'])
-        when 'node'
-          @graph.add_vertex(attrs['id'])
+          when 'edge'
+            @graph.add_edge(attrs['source'], attrs['target'])
+          when 'node'
+            @graph.add_vertex(attrs['id'])
         end
       end
-    end		# class MutableGraphParser
 
+    end # class MutableGraphParser
+
     # Initializes an RGL graph from a subset of the GraphML format given in
     # +source+ (see http://www.graphdrawing.org/graphml).
+    #
     def from_graphxml(source)
       listener = MutableGraphParser.new(self)
       REXML::Document.parse_stream(source, listener)
       self
     end
-  end                           # module MutableGraph
-end                             # module RGL
+
+  end # module MutableGraph
+
+end # module RGL