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<?php
namespace Drupal\node;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityViewBuilder;
use Drupal\Core\Render\Element\Link;
use Drupal\Core\Security\TrustedCallbackInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
// cspell:ignore readmore
/**
* View builder handler for nodes.
*/
class NodeViewBuilder extends EntityViewBuilder implements TrustedCallbackInterface {
use StringTranslationTrait;
/**
* {@inheritdoc}
*/
public function buildComponents(array &$build, array $entities, array $displays, $view_mode) {
/** @var \Drupal\node\NodeInterface[] $entities */
if (empty($entities)) {
return;
}
parent::buildComponents($build, $entities, $displays, $view_mode);
foreach ($entities as $id => $entity) {
$bundle = $entity->bundle();
$display = $displays[$bundle];
if ($display->getComponent('links')) {
$build[$id]['links'] = [
'#lazy_builder' => [
static::class . '::renderLinks', [
$entity->id(),
$view_mode,
$entity->language()->getId(),
!empty($entity->in_preview),
$entity->isDefaultRevision() ? NULL : $entity->getLoadedRevisionId(),
],
],
];
}
// Add Language field text element to node render array.
if ($display->getComponent('langcode')) {
$build[$id]['langcode'] = [
'#type' => 'item',
'#title' => $this->t('Language'),
'#markup' => $entity->language()->getName(),
'#prefix' => '<div id="field-language-display">',
'#suffix' => '</div>',
];
}
}
}
/**
* {@inheritdoc}
*/
protected function getBuildDefaults(EntityInterface $entity, $view_mode) {
$defaults = parent::getBuildDefaults($entity, $view_mode);
// Don't cache nodes that are in 'preview' mode.
if (isset($defaults['#cache']) && isset($entity->in_preview)) {
unset($defaults['#cache']);
}
return $defaults;
}
/**
* Render API callback: Builds a node's links.
*
* This function is assigned as a #lazy_builder callback.
*
* @param string $node_entity_id
* The node entity ID.
* @param string $view_mode
* The view mode in which the node entity is being viewed.
* @param string $langcode
* The language in which the node entity is being viewed.
* @param bool $is_in_preview
* Whether the node is currently being previewed.
* @param int|string $revision_id
* (optional) The identifier of the node revision to be loaded. If none
* is provided, the default revision will be loaded.
*
* @return array
* A renderable array representing the node links.
*/
public static function renderLinks($node_entity_id, $view_mode, $langcode, $is_in_preview, $revision_id = NULL) {
$links = [
'#theme' => 'links__node',
'#pre_render' => [[Link::class, 'preRenderLinks']],
'#attributes' => ['class' => ['links', 'inline']],
];
if (!$is_in_preview) {
$storage = \Drupal::entityTypeManager()->getStorage('node');
/** @var \Drupal\node\NodeInterface $revision */
$revision = !isset($revision_id) ? $storage->load($node_entity_id) : $storage->loadRevision($revision_id);
$entity = $revision->getTranslation($langcode);
$links['node'] = static::buildLinks($entity, $view_mode);
// Allow other modules to alter the node links.
$hook_context = [
'view_mode' => $view_mode,
'langcode' => $langcode,
];
\Drupal::moduleHandler()->alter('node_links', $links, $entity, $hook_context);
}
return $links;
}
/**
* Build the default links (Read more) for a node.
*
* @param \Drupal\node\NodeInterface $entity
* The node object.
* @param string $view_mode
* A view mode identifier.
*
* @return array
* An array that can be processed by Link::preRenderLinks().
*
* @see \Drupal\Core\Render\Element\Link::preRenderLinks()
*/
protected static function buildLinks(NodeInterface $entity, $view_mode) {
$links = [];
// Always display a read more link on teasers because we have no way
// to know when a teaser view is different than a full view.
if ($view_mode == 'teaser') {
$node_title_stripped = strip_tags($entity->label());
$links['node-readmore'] = [
'title' => t('Read more<span class="visually-hidden"> about @title</span>', [
'@title' => $node_title_stripped,
]),
'url' => $entity->toUrl(),
'language' => $entity->language(),
'attributes' => [
'rel' => 'tag',
'title' => $node_title_stripped,
],
];
}
return [
'#theme' => 'links__node__node',
'#links' => $links,
'#attributes' => ['class' => ['links', 'inline']],
];
}
/**
* {@inheritdoc}
*/
public static function trustedCallbacks() {
$callbacks = parent::trustedCallbacks();
$callbacks[] = 'renderLinks';
return $callbacks;
}
}
|
