Class: XMLRenderer

Inherits:
Object
  • Object
show all
Defined in:
lib/ruql/renderers/xml_renderer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(quiz, options = {}) ⇒ XMLRenderer

Returns a new instance of XMLRenderer.



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# File 'lib/ruql/renderers/xml_renderer.rb', line 5

def initialize(quiz,options={})
  @output = ''
  @b = Builder::XmlMarkup.new(:target => @output, :indent => 2)
  @quiz = quiz
end

Instance Attribute Details

#output ⇒ Object (readonly)

Returns the value of attribute output.



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# File 'lib/ruql/renderers/xml_renderer.rb', line 4

def output
  @output
end

Instance Method Details

#render(thing) ⇒ Object 



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# File 'lib/ruql/renderers/xml_renderer.rb', line 11

def render(thing)
  case thing
  when MultipleChoice,SelectMultiple,TrueFalse then render_multiple_choice(thing)
  when FillIn then render_fill_in(thing)
  else
    raise "Unknown question type: #{thing}"
  end
end

#render_fill_in(question) ⇒ Object 



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# File 'lib/ruql/renderers/xml_renderer.rb', line 36

def render_fill_in(question)
  @b.question :type => 'GS_Short_Answer_Question_Simple', :id => question.object_id.to_s(16) do
    @b.metadata {
      @b.parameters {
        @b.rescale_score question.points
        @b.type 'regexp'
      }
    }
    # since we want all the options to appear, we create N option
    # groups each containig 1 option, and specify that option to
    # always be selected for inclusion in the quiz.  If the original
    # question specified 'random', use the 'randomize' attribute on
    # option_groups to scramble the order in which displayed;
    # otherwise, display in same order as answers appear in source.
    @b.data {
      @b.text { @b.cdata!(question.question_text) }
      @b.option_groups(:randomize => !!question.randomize) {
        @b.option_group(:select => 'all') {
          question.answers.each do |answer|
            option_args = {}
            option_args['selected_score'] = answer.correct? ? 1 : 0
            option_args['unselected_score'] =
              question.multiple ? 1 - option_args['selected_score'] : 0
            option_args['id'] = answer.object_id.to_s(16)
            @b.option(option_args) do
              answer_text = answer.answer_text
              if answer_text.kind_of?(Regexp)
                answer_text = answer_text.inspect
                if !question.case_sensitive
                  answer_text += 'i'
                end
              end
              @b.text { @b.cdata!(answer_text) }
              @b.explanation { @b.cdata!(answer.explanation) } if answer.has_explanation?
            end
          end
        }
      }
    }
  end
end

#render_multiple_choice(question) ⇒ Object Also known as: render_true_false 



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# File 'lib/ruql/renderers/xml_renderer.rb', line 78

def render_multiple_choice(question)
  @b.question :type => 'GS_Choice_Answer_Question', :id => question.object_id.to_s(16) do
    @b.metadata {
      @b.parameters {
        @b.rescale_score question.points
        @b.choice_type (question.multiple ? 'checkbox' : 'radio')
      }
    }
    # since we want all the options to appear, we create N option
    # groups each containig 1 option, and specify that option to
    # always be selected for inclusion in the quiz.  If the original
    # question specified 'random', use the 'randomize' attribute on
    # option_groups to scramble the order in which displayed;
    # otherwise, display in same order as answers appear in source.
    @b.data {
      @b.text { @b.cdata!(question.question_text) }
      @b.option_groups(:randomize => !!question.randomize) {
        question.answers.each do |a|
          @b.option_group(:select => 'all') {
            self.render_multiple_choice_answer a, question.multiple
          }
        end
      }
    }
  end
end

#render_multiple_choice_answer(answer, multiple_allowed) ⇒ Object 



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# File 'lib/ruql/renderers/xml_renderer.rb', line 106

def render_multiple_choice_answer(answer, multiple_allowed)
  option_args = {}
  option_args['selected_score'] = answer.correct? ? 1 : 0
  option_args['unselected_score'] =
    multiple_allowed ? 1 - option_args['selected_score'] : 0
  option_args['id'] = answer.object_id.to_s(16)
  @b.option(option_args) do
    @b.text { @b.cdata!(answer.answer_text) }
    @b.explanation { @b.cdata!(answer.explanation) } if answer.has_explanation?
  end
end

#render_quiz ⇒ Object 



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# File 'lib/ruql/renderers/xml_renderer.rb', line 20

def render_quiz
  # entire quiz can be in one question group, as long as we specify
  # that ALL question from the group must be used to make the quiz.
  xml_quiz do
    # after preamble...
    @b.question_groups do
      @b.question_group(:select => @quiz.questions.length) do
        @quiz.questions.each do |question|
          self.render(question)
        end
      end
    end
  end
  @output
end