function MediaLibraryWidget::removeItem

Submit callback for remove buttons.

Parameters

array $form: The form array.

\Drupal\Core\Form\FormStateInterface $form_state: The form state.

File

core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php, line 776

Class

MediaLibraryWidget

Plugin implementation of the 'media_library_widget' widget.

Namespace

Code

public static function removeItem(array $form, FormStateInterface $form_state) {
    // During the form rebuild, formElement() will create field item widget
    // elements using re-indexed deltas, so clear out FormState::$input to
    // avoid a mismatch between old and new deltas. The rebuilt elements will
    // have #default_value set appropriately for the current state of the field,
    // so nothing is lost in doing this.
    // @see Drupal\media_library\Plugin\Field\FieldWidget\MediaLibraryWidget::extractFormValues
    $triggering_element = $form_state->getTriggeringElement();
    $parents = array_slice($triggering_element['#parents'], 0, -2);
    NestedArray::setValue($form_state->getUserInput(), $parents, NULL);
    // Get the parents required to find the top-level widget element.
    if (count($triggering_element['#array_parents']) < 4) {
        throw new \LogicException('Expected the remove button to be more than four levels deep in the form. Triggering element parents were: ' . implode(',', $triggering_element['#array_parents']));
    }
    $parents = array_slice($triggering_element['#array_parents'], 0, -3);
    $element = NestedArray::getValue($form, $parents);
    // Get the field state.
    $path = $element['#parents'];
    $values = NestedArray::getValue($form_state->getValues(), $path);
    $field_state = static::getFieldState($element, $form_state);
    // Get the delta of the item being removed.
    $delta = array_slice($triggering_element['#array_parents'], -2, 1)[0];
    if (isset($values['selection'][$delta])) {
        // Add the weight of the removed item to the field state so we can shift
        // focus to the next/previous item in an easy way.
        $field_state['removed_item_weight'] = $values['selection'][$delta]['weight'];
        $field_state['removed_item_id'] = $triggering_element['#media_id'];
        unset($values['selection'][$delta]);
        $field_state['items'] = $values['selection'];
        static::setFieldState($element, $form_state, $field_state);
    }
    $form_state->setRebuild();
}