DOMDocument fixArticleLandmarks

  private function fixArticleLandmarks() {
    $articlelist = $this->xmlBody->getElementsByTagName('article');
    $nn = $articlelist->length;
    if($nn == 0) {
      return;
    }
    $x = new DOMXPath($this->dom);
    for($ii = 0; $ii < $nn; $ii++) {
      $arnode = $articlelist->item($ii);
      $nodelist = $arnode->getElementsByTagName('aside');
      $n = $nodelist->length;
      for($i = 0; $i < $n; $i++) {
        $aside = $nodelist->item($i);
        if(! $aside->hasAttribute('role')) {
          $aside->setAttribute('role', 'region');
          if(! $aside->hasAttribute('aria-labelledby')) {
            if(! $aside->hasAttribute('aria-label')) {
              $count = 0;
              foreach($aside->childNodes as $child) {
                if(!($child instanceof \DomText)) {
                  $count++;
                }
              }
              if($count != 0) {
                $first = $x->query('*', $aside)->item(0);
                $tagname = $first->tagName;
                if(in_array($tagname, array ('h2', 'h3', 'h4', 'h5', 'h6'))) {
                  $labelid = "aside: " . trim($first->textContent);
                  $aside->setAttribute('aria-label', $labelid);
                }
              }
            }
          }
        }
      } // end for $i loop 
      $nodelist = $arnode->getElementsByTagName('section');
      $n = $nodelist->length;
      for($i = 0; $i < $n; $i++) {
        $section = $nodelist->item($i);
        if(! $section->hasAttribute('aria-labelledby')) {
          if(! $section->hasAttribute('aria-label')) {
            $count = 0;
            foreach($section->childNodes as $child) {
              if(!($child instanceof \DomText)) {
                $count++;
              }
            }
            if($count != 0) {
              $first = $x->query('*', $section)->item(0);
              $tagname = $first->tagName;
              if(in_array($tagname, array ('h2', 'h3', 'h4', 'h5', 'h6'))) {
                $labelid = "section: " . trim($first->textContent);
                $section->setAttribute('aria-label', $labelid);
              }
            }
          }
        }
      } //end of for $i loop
      $nodelist = $arnode->getElementsByTagName('details');
      $n = $nodelist->length;
      for($i = 0; $i < $n; $i++) {
        $details = $nodelist->item($i);
        if($details->hasAttribute('class')) {
          $class = $details->getAttribute('class');
          if(strcmp($class, 'toc') == 0) {
            $details->setAttribute('role', 'navigation');
            if(! $details->hasAttribute('aria-labelledby')) {
              if(! $details->hasAttribute('aria-label')) {
                $details->setAttribute('aria-label', 'Table of Contents');
              }
            }
          }
        }
      } // end of for $i loop
    } // end for for $ii loop
  } // end of function