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<?php
namespace Drupal\entity_hierarchy\Plugin\Field\FieldWidget;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\Plugin\Field\FieldWidget\EntityReferenceAutocompleteWidget;
use Symfony\Component\Validator\ConstraintViolationInterface;
class EntityReferenceHierarchyAutocomplete extends EntityReferenceAutocompleteWidget {
const HIDE_WEIGHT = 'hide_weight';
public function errorElement(array $element, ConstraintViolationInterface $error, array $form, FormStateInterface $form_state) {
if (isset($element[0]['target_id'])) {
return $element[0]['target_id'];
}
if (isset($element['target_id'])) {
return $element['target_id'];
}
return FALSE;
}
public static function defaultSettings() {
return parent::defaultSettings() + [
self::HIDE_WEIGHT => FALSE,
];
}
public function settingsForm(array $form, FormStateInterface $form_state) {
return parent::settingsForm($form, $form_state) + [
'hide_weight' => [
'#type' => 'checkbox',
'#title' => $this
->t('Hide weight field'),
'#description' => $this
->t('Hide the weight field and use the default value instead'),
'#default_value' => $this
->getSetting(self::HIDE_WEIGHT),
],
];
}
public function settingsSummary() {
$summary = parent::settingsSummary();
if ($this
->getSetting(self::HIDE_WEIGHT)) {
$summary[] = $this
->t('Weight field is hidden');
}
return $summary;
}
public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
$widget = [
'#attributes' => [
'class' => [
'form--inline',
'clearfix',
],
],
'#theme_wrappers' => [
'container',
],
];
$widget['target_id'] = parent::formElement($items, $delta, $element, $form, $form_state);
if ($this
->getSetting(self::HIDE_WEIGHT)) {
$widget['weight'] = [
'#type' => 'value',
'#value' => isset($items[$delta]->weight) ? $items[$delta]->weight : 0,
];
}
else {
$widget['weight'] = [
'#type' => 'number',
'#size' => '4',
'#default_value' => isset($items[$delta]) ? $items[$delta]->weight : 1,
'#weight' => 10,
];
if ($this->fieldDefinition
->getFieldStorageDefinition()
->isMultiple()) {
$widget['weight']['#placeholder'] = $this->fieldDefinition
->getSetting('weight_label');
}
else {
$widget['weight']['#title'] = $this->fieldDefinition
->getSetting('weight_label');
}
}
return $widget;
}
}