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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\Breadcrumb\Breadcrumb. | |
| */ | |
| namespace Drupal\Core\Breadcrumb; | |
| use Drupal\Core\Cache\RefinableCacheableDependencyInterface; | |
| use Drupal\Core\Cache\RefinableCacheableDependencyTrait; | |
| use Drupal\Core\Link; | |
| use Drupal\Core\Render\RenderableInterface; | |
| /** | |
| * Used to return generated breadcrumbs with associated cacheability metadata. | |
| */ | |
| class Breadcrumb implements RenderableInterface, RefinableCacheableDependencyInterface { | |
| use RefinableCacheableDependencyTrait; | |
| /** | |
| * An ordered list of links for the breadcrumb. | |
| * | |
| * @var \Drupal\Core\Link[] | |
| */ | |
| protected $links = []; | |
| /** | |
| * Gets the breadcrumb links. | |
| * | |
| * @return \Drupal\Core\Link[] | |
| */ | |
| public function getLinks() { | |
| return $this->links; | |
| } | |
| /** | |
| * Sets the breadcrumb links. | |
| * | |
| * @param \Drupal\Core\Link[] $links | |
| * The breadcrumb links. | |
| * | |
| * @return $this | |
| * | |
| * @throws \LogicException | |
| * Thrown when setting breadcrumb links after they've already been set. | |
| */ | |
| public function setLinks(array $links) { | |
| if (!empty($this->links)) { | |
| throw new \LogicException('Once breadcrumb links are set, only additional breadcrumb links can be added.'); | |
| } | |
| $this->links = $links; | |
| return $this; | |
| } | |
| /** | |
| * Appends a link to the end of the ordered list of breadcrumb links. | |
| * | |
| * @param \Drupal\Core\Link $link | |
| * The link appended to the breadcrumb. | |
| * | |
| * @return $this | |
| */ | |
| public function addLink(Link $link) { | |
| $this->links[] = $link; | |
| return $this; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function toRenderable() { | |
| $build = [ | |
| '#cache' => [ | |
| 'contexts' => $this->cacheContexts, | |
| 'tags' => $this->cacheTags, | |
| 'max-age' => $this->cacheMaxAge, | |
| ], | |
| ]; | |
| if (!empty($this->links)) { | |
| $build += [ | |
| '#theme' => 'breadcrumb', | |
| '#links' => $this->links, | |
| ]; | |
| } | |
| return $build; | |
| } | |
| } |