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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\contextual\Element\ContextualLinksPlaceholder. | |
| */ | |
| namespace Drupal\contextual\Element; | |
| use Drupal\Core\Template\Attribute; | |
| use Drupal\Core\Render\Element\RenderElement; | |
| use Drupal\Component\Utility\SafeMarkup; | |
| /** | |
| * Provides a contextual_links_placeholder element. | |
| * | |
| * @RenderElement("contextual_links_placeholder") | |
| */ | |
| class ContextualLinksPlaceholder extends RenderElement { | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getInfo() { | |
| $class = get_class($this); | |
| return array( | |
| '#pre_render' => array( | |
| array($class, 'preRenderPlaceholder'), | |
| ), | |
| '#id' => NULL, | |
| ); | |
| } | |
| /** | |
| * Pre-render callback: Renders a contextual links placeholder into #markup. | |
| * | |
| * Renders an empty (hence invisible) placeholder div with a data-attribute | |
| * that contains an identifier ("contextual id"), which allows the JavaScript | |
| * of the drupal.contextual-links library to dynamically render contextual | |
| * links. | |
| * | |
| * @param array $element | |
| * A structured array with #id containing a "contextual id". | |
| * | |
| * @return array | |
| * The passed-in element with a contextual link placeholder in '#markup'. | |
| * | |
| * @see _contextual_links_to_id() | |
| */ | |
| public static function preRenderPlaceholder(array $element) { | |
| $element['#markup'] = SafeMarkup::format('<div@attributes></div>', ['@attributes' => new Attribute(['data-contextual-id' => $element['#id']])]); | |
| return $element; | |
| } | |
| } |