get_class_method_choice

# File lib/rdoc/ri/display.rb, line 128
  def get_class_method_choice(method_map)
    if CAN_USE_READLINE
      # prepare abbreviations for tab completion
      abbreviations = method_map.keys.abbrev
      Readline.completion_proc = proc do |string| 
        abbreviations.values.uniq.grep(/^#{string}/)
      end
    end
    
    @formatter.raw_print_line "\nEnter the method name you want.\n"
    @formatter.raw_print_line "Class methods can be preceeded by '::' and instance methods by '#'.\n"

    if CAN_USE_READLINE
      @formatter.raw_print_line "You can use tab to autocomplete.\n"
      @formatter.raw_print_line "Enter a blank line to exit.\n"
      
      choice_string = Readline.readline(">> ").strip
    else
      @formatter.raw_print_line "Enter a blank line to exit.\n"
      @formatter.raw_print_line ">> "
      choice_string = $stdin.gets.strip
    end
    
    if choice_string == ''
      return nil
    else
      class_or_instance = method_map[choice_string]

      if class_or_instance
        # If the user's choice is not preceeded by a '::' or a '#', figure
        # out whether they want a class or an instance method and decorate
        # the choice appropriately.
        if(choice_string =~ /^[a-zA-Z]/)
          if(class_or_instance == :class)
            choice_string = "::#{choice_string}"
          else
            choice_string = "##{choice_string}"
          end
        end

        return choice_string
      else
        @formatter.raw_print_line "No method matched '#{choice_string}'.\n"
        return nil
      end
    end
  end