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<?php
namespace Drupal\Core\Field\Plugin\Field\FieldFormatter;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemInterface;
use Drupal\Core\Field\FormatterBase;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Form\FormStateInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
class StringFormatter extends FormatterBase {
protected $entityTypeManager;
public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings, EntityTypeManagerInterface $entity_type_manager) {
parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode, $third_party_settings);
$this->entityTypeManager = $entity_type_manager;
}
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['label'], $configuration['view_mode'], $configuration['third_party_settings'], $container
->get('entity_type.manager'));
}
public static function defaultSettings() {
$options = parent::defaultSettings();
$options['link_to_entity'] = FALSE;
return $options;
}
public function settingsForm(array $form, FormStateInterface $form_state) {
$form = parent::settingsForm($form, $form_state);
$entity_type = $this->entityTypeManager
->getDefinition($this->fieldDefinition
->getTargetEntityTypeId());
if ($entity_type
->hasLinkTemplate('canonical')) {
$form['link_to_entity'] = [
'#type' => 'checkbox',
'#title' => $this
->t('Link to the @entity_label', [
'@entity_label' => $entity_type
->getLabel(),
]),
'#default_value' => $this
->getSetting('link_to_entity'),
];
}
return $form;
}
public function settingsSummary() {
$summary = [];
if ($this
->getSetting('link_to_entity')) {
$entity_type = $this->entityTypeManager
->getDefinition($this->fieldDefinition
->getTargetEntityTypeId());
if ($entity_type
->hasLinkTemplate('canonical')) {
$summary[] = $this
->t('Linked to the @entity_label', [
'@entity_label' => $entity_type
->getLabel(),
]);
}
}
return $summary;
}
public function viewElements(FieldItemListInterface $items, $langcode) {
$elements = [];
$url = NULL;
$entity = $items
->getEntity();
$entity_type = $entity
->getEntityType();
if ($this
->getSetting('link_to_entity') && !$entity
->isNew() && $entity_type
->hasLinkTemplate('canonical')) {
$url = $this
->getEntityUrl($entity);
}
foreach ($items as $delta => $item) {
$view_value = $this
->viewValue($item);
if ($url) {
$elements[$delta] = [
'#type' => 'link',
'#title' => $view_value,
'#url' => $url,
];
}
else {
$elements[$delta] = $view_value;
}
}
return $elements;
}
protected function viewValue(FieldItemInterface $item) {
return [
'#type' => 'inline_template',
'#template' => '{{ value|nl2br }}',
'#context' => [
'value' => $item->value,
],
];
}
protected function getEntityUrl(EntityInterface $entity) {
$rel = $entity
->getEntityType()
->hasLinkTemplate('revision') ? 'revision' : 'canonical';
return $entity
->toUrl($rel);
}
}