original_string: public function question_dependency_icon($structure, $slot) {
          $a = array(
              'thisq' => $structure->get_displayed_number_for_slot($slot),
              'previousq' => $structure->get_displayed_number_for_slot(max($slot - 1, 1)),
          );
          if ($structure->is_question_dependent_on_previous_slot($slot)) {
              $title = get_string('questiondependencyremove', 'quiz', $a);
              $image = $this->pix_icon('t/locked', get_string('questiondependsonprevious', 'quiz'),
                      'moodle', array('title' => ''));
              $action = 'removedependency';
          } else {
              $title = get_string('questiondependencyadd', 'quiz', $a);
              $image = $this->pix_icon('t/unlocked', get_string('questiondependencyfree', 'quiz'),
                      'moodle', array('title' => ''));
              $action = 'adddependency';
          }
  
          // Disable the link if quiz has attempts.
          $disabled = null;
          if (!$structure->can_be_edited()) {
              $disabled = 'disabled';
          }
          $extraclass = '';
          if (!$structure->can_question_depend_on_previous_slot($slot)) {
              $extraclass = ' question_dependency_cannot_depend';
          }
          return html_writer::span($this->action_link('#', $image, null, array('title' => $title,
                  'class' => 'cm-edit-action', 'disabled' => $disabled, 'data-action' => $action)),
                  'question_dependency_wrapper' . $extraclass);
      }
code: public function question_dependency_icon($structure, $slot) {
          $a = array(
              'thisq' => $structure->get_displayed_number_for_slot($slot),
              'previousq' => $structure->get_displayed_number_for_slot(max($slot - 1, 1)),
          );
          if ($structure->is_question_dependent_on_previous_slot($slot)) {
              $title = get_string('questiondependencyremove', 'quiz', $a);
              $image = $this->pix_icon('t/locked', get_string('questiondependsonprevious', 'quiz'),
                      'moodle', array('title' => ''));
              $action = 'removedependency';
          } else {
              $title = get_string('questiondependencyadd', 'quiz', $a);
              $image = $this->pix_icon('t/unlocked', get_string('questiondependencyfree', 'quiz'),
                      'moodle', array('title' => ''));
              $action = 'adddependency';
          }
  
          // Disable the link if quiz has attempts.
          $disabled = null;
          if (!$structure->can_be_edited()) {
              $disabled = 'disabled';
          }
          $extraclass = '';
          if (!$structure->can_question_depend_on_previous_slot($slot)) {
              $extraclass = ' question_dependency_cannot_depend';
          }
          return html_writer::span($this->action_link('#', $image, null, array('title' => $title,
                  'class' => 'cm-edit-action', 'disabled' => $disabled, 'data-action' => $action)),
                  'question_dependency_wrapper' . $extraclass);
      }
code_tokens: public function question_dependency_icon ( $ structure , $ slot ) { $ a = array ( 'thisq' => $ structure -> get_displayed_number_for_slot ( $ slot ) , 'previousq' => $ structure -> get_displayed_number_for_slot ( max ( $ slot - 1 , 1 ) ) , ) ; if ( $ structure -> is_question_dependent_on_previous_slot ( $ slot ) ) { $ title = get_string ( 'questiondependencyremove' , 'quiz' , $ a ) ; $ image = $ this -> pix_icon ( 't/locked' , get_string ( 'questiondependsonprevious' , 'quiz' ) , 'moodle' , array ( 'title' => '' ) ) ; $ action = 'removedependency' ; } else { $ title = get_string ( 'questiondependencyadd' , 'quiz' , $ a ) ; $ image = $ this -> pix_icon ( 't/unlocked' , get_string ( 'questiondependencyfree' , 'quiz' ) , 'moodle' , array ( 'title' => '' ) ) ; $ action = 'adddependency' ; } // Disable the link if quiz has attempts. $ disabled = null ; if ( ! $ structure -> can_be_edited ( ) ) { $ disabled = 'disabled' ; } $ extraclass = '' ; if ( ! $ structure -> can_question_depend_on_previous_slot ( $ slot ) ) { $ extraclass = ' question_dependency_cannot_depend' ; } return html_writer :: span ( $ this -> action_link ( '#' , $ image , null , array ( 'title' => $ title , 'class' => 'cm-edit-action' , 'disabled' => $ disabled , 'data-action' => $ action ) ) , 'question_dependency_wrapper' . $ extraclass ) ; }
docstring: Display the icon for whether this question can only be seen if the previous
  one has been answered.
  
  @param structure $structure object containing the structure of the quiz.
  @param int $slot the first slot on the page we are outputting.
  @return string HTML to output.
docstring_tokens: Display the icon for whether this question can only be seen if the previous one has been answered .