Coderay upgraded to 0.9.7 (#5344).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4739 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/gems/coderay-0.9.7/lib/coderay/encoders/statistic.rb

@@ -0,0 +1,77 @@
+module CodeRay
+module Encoders
+
+  # Makes a statistic for the given tokens.
+  class Statistic < Encoder
+
+    include Streamable
+    register_for :stats, :statistic
+
+    attr_reader :type_stats, :real_token_count
+
+  protected
+
+    TypeStats = Struct.new :count, :size
+
+    def setup options
+      @type_stats = Hash.new { |h, k| h[k] = TypeStats.new 0, 0 }
+      @real_token_count = 0
+    end
+
+    def generate tokens, options
+      @tokens = tokens
+      super
+    end
+
+    def text_token text, kind
+      @real_token_count += 1 unless kind == :space
+      @type_stats[kind].count += 1
+      @type_stats[kind].size += text.size
+      @type_stats['TOTAL'].size += text.size
+      @type_stats['TOTAL'].count += 1
+    end
+
+    # TODO Hierarchy handling
+    def block_token action, kind
+      @type_stats['TOTAL'].count += 1
+      @type_stats['open/close'].count += 1
+    end
+
+    STATS = <<-STATS
+
+Code Statistics
+
+Tokens            %8d
+  Non-Whitespace  %8d
+Bytes Total       %8d
+
+Token Types (%d):
+  type                     count     ratio    size (average)
+-------------------------------------------------------------
+%s
+      STATS
+# space                    12007   33.81 %     1.7
+    TOKEN_TYPES_ROW = <<-TKR
+  %-20s  %8d  %6.2f %%   %5.1f
+      TKR
+
+    def finish options
+      all = @type_stats['TOTAL']
+      all_count, all_size = all.count, all.size
+      @type_stats.each do |type, stat|
+        stat.size /= stat.count.to_f
+      end
+      types_stats = @type_stats.sort_by { |k, v| [-v.count, k.to_s] }.map do |k, v|
+        TOKEN_TYPES_ROW % [k, v.count, 100.0 * v.count / all_count, v.size]
+      end.join
+      STATS % [
+        all_count, @real_token_count, all_size,
+        @type_stats.delete_if { |k, v| k.is_a? String }.size,
+        types_stats
+      ]
+    end
+
+  end
+
+end
+end