/**
* {@inheritdoc}
*/
public function process($text, $langcode)
{
$result = new FilterProcessResult($text);
if (stristr($text, 'data-caption') !== FALSE || stristr($text, 'data-align') !== FALSE) {
$caption_found = FALSE;
$dom = Html::load($text);
$xpath = new \DOMXPath($dom);
foreach ($xpath->query('//*[@data-caption or @data-align]') as $node) {
$caption = NULL;
$align = NULL;
// Retrieve, then remove the data-caption and data-align attributes.
if ($node->hasAttribute('data-caption')) {
$caption = String::checkPlain($node->getAttribute('data-caption'));
$node->removeAttribute('data-caption');
// Sanitize caption: decode HTML encoding, limit allowed HTML tags;
// only allow inline tags that are allowed by default, plus <br>.
$caption = String::decodeEntities($caption);
$caption = Xss::filter($caption, array('a', 'em', 'strong', 'cite', 'code', 'br'));
// The caption must be non-empty.
if (Unicode::strlen($caption) === 0) {
$caption = NULL;
}
}
if ($node->hasAttribute('data-align')) {
$align = $node->getAttribute('data-align');
$node->removeAttribute('data-align');
// Only allow 3 values: 'left', 'center' and 'right'.
if (!in_array($align, array('left', 'center', 'right'))) {
$align = NULL;
}
}
// Don't transform the HTML if there isn't a caption after validation.
if ($caption === NULL) {
// If there is a valid alignment, then transform the data-align
// attribute to a corresponding alignment class.
if ($align !== NULL) {
$classes = $node->getAttribute('class');
$classes = strlen($classes) > 0 ? explode(' ', $classes) : array();
$classes[] = 'align-' . $align;
$node->setAttribute('class', implode(' ', $classes));
}
continue;
} else {
$caption_found = TRUE;
}
// Given the updated node, caption and alignment: re-render it with a
// caption.
$filter_caption = array('#theme' => 'filter_caption', '#node' => SafeMarkup::set($node->C14N()), '#tag' => $node->tagName, '#caption' => $caption, '#align' => $align);
$altered_html = drupal_render($filter_caption);
// Load the altered HTML into a new DOMDocument and retrieve the element.
$updated_node = Html::load($altered_html)->getElementsByTagName('body')->item(0)->childNodes->item(0);
// Import the updated node from the new DOMDocument into the original
// one, importing also the child nodes of the updated node.
$updated_node = $dom->importNode($updated_node, TRUE);
// Finally, replace the original image node with the new image node!
$node->parentNode->replaceChild($updated_node, $node);
}
$result->setProcessedText(Html::serialize($dom));
if ($caption_found) {
$result->addAssets(array('library' => array('filter/caption')));
}
}
return $result;
}
/**
* {@inheritdoc}
*/
public function process($text, $langcode)
{
$result = new FilterProcessResult($text);
$result->addAssets(array('library' => array('filter/caption')));
return $result;
}
