function WidgetBase::deleteSubmit

Ajax submit callback for the "Remove" button.

This re-numbers form elements and removes an item.

Parameters

array $form: The form array to remove elements from.

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

File

core/lib/Drupal/Core/Field/WidgetBase.php, line 379

Class

WidgetBase

Base class for 'Field widget' plugin implementations.

Namespace

Code

public static function deleteSubmit(&$form, FormStateInterface $form_state) {
    $button = $form_state->getTriggeringElement();
    $delta = (int) $button['#delta'];
    $array_parents = array_slice($button['#array_parents'], 0, -4);
    $parent_element = NestedArray::getValue($form, array_merge($array_parents, [
        'widget',
    ]));
    $field_name = $parent_element['#field_name'];
    $parents = $parent_element['#field_parents'];
    $field_state = static::getWidgetState($parents, $field_name, $form_state);
    $user_input = $form_state->getUserInput();
    $field_input = NestedArray::getValue($user_input, $parent_element['#parents'], $exists);
    if ($exists) {
        $field_values = [];
        foreach ($field_input as $key => $input) {
            if (is_numeric($key) && $key >= $delta) {
                if ((int) $key === $delta) {
                    --$key;
                    continue;
                }
            }
            $field_values[$key] = $input;
        }
        NestedArray::setValue($user_input, $parent_element['#parents'], $field_values);
        $form_state->setUserInput($user_input);
    }
    $field_state['deleted_item'] = $delta;
    unset($parent_element[$delta]);
    NestedArray::setValue($form, $array_parents, $parent_element);
    if ($field_state['items_count'] > 0) {
        $field_state['items_count']--;
    }
    $user_input = $form_state->getUserInput();
    $input = NestedArray::getValue($user_input, $parent_element['#parents'], $exists);
    $weight = -1 * $field_state['items_count'];
    foreach ($input as $key => $item) {
        if ($item) {
            $input[$key]['_weight'] = $weight++;
        }
    }
    // Reset indices.
    $input = array_values($input);
    $user_input = $form_state->getUserInput();
    NestedArray::setValue($user_input, $parent_element['#parents'], $input);
    $form_state->setUserInput($user_input);
    static::setWidgetState($parents, $field_name, $form_state, $field_state);
    $form_state->setRebuild();
}