Same name and namespace in other branches

1. 9 core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php \Drupal\media_library\Plugin\Field\FieldWidget\MediaLibraryWidget::updateWidget()
2. 8.9.x core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php \Drupal\media_library\Plugin\Field\FieldWidget\MediaLibraryWidget::updateWidget()
3. 10 core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php \Drupal\media_library\Plugin\Field\FieldWidget\MediaLibraryWidget::updateWidget()

AJAX callback to update the widget when the selection changes.

Parameters

array $form: The form array.

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

Return value

\Drupal\Core\Ajax\AjaxResponse An AJAX response to update the selection.

File

core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php, line 689

Class

MediaLibraryWidget

Plugin implementation of the 'media_library_widget' widget.

Namespace

Drupal\media_library\Plugin\Field\FieldWidget

Code

public static function updateWidget(array $form, FormStateInterface $form_state) {
    $triggering_element = $form_state->getTriggeringElement();
    $wrapper_id = $triggering_element['#ajax']['wrapper'];
    // This callback is either invoked from the remove button or the update
    // button, which have different nesting levels.
    $is_remove_button = end($triggering_element['#parents']) === 'remove_button';
    $length = $is_remove_button ? -3 : -1;
    if (count($triggering_element['#array_parents']) < abs($length)) {
        throw new \LogicException('The element that triggered the widget update was at an unexpected depth. Triggering element parents were: ' . implode(',', $triggering_element['#array_parents']));
    }
    $parents = array_slice($triggering_element['#array_parents'], 0, $length);
    $element = NestedArray::getValue($form, $parents);
    // Always clear the textfield selection to prevent duplicate additions.
    $element['media_library_selection']['#value'] = '';
    $field_state = static::getFieldState($element, $form_state);
    // Announce the updated content to screen readers.
    if ($is_remove_button) {
        $media_item = Media::load($field_state['removed_item_id']);
        $announcement = $media_item->access('view label') ? new TranslatableMarkup('@label has been removed.', [
            '@label' => $media_item->label(),
        ]) : new TranslatableMarkup('Media has been removed.');
    }
    else {
        $new_items = count(static::getNewMediaItems($element, $form_state));
        $announcement = \Drupal::translation()->formatPlural($new_items, 'Added one media item.', 'Added @count media items.');
    }
    $response = new AjaxResponse();
    $response->addCommand(new ReplaceCommand("#{$wrapper_id}", $element));
    $response->addCommand(new AnnounceCommand($announcement));
    // When the remove button is clicked, shift focus to the next remove button.
    // When the last item is deleted, we no longer have a selection and shift
    // the focus to the open button.
    $removed_last = $is_remove_button && !count($field_state['items']);
    if ($is_remove_button && !$removed_last) {
        // Find the next media item by weight. The weight of the removed item is
        // added to the field state when it is removed in ::removeItem(). If there
        // is no item with a bigger weight, we automatically shift the focus to
        // the previous media item.
        // @see ::removeItem()
        $removed_item_weight = $field_state['removed_item_weight'];
        $delta_to_focus = 0;
        foreach ($field_state['items'] as $delta => $item_fields) {
            $delta_to_focus = $delta;
            if ($item_fields['weight'] > $removed_item_weight) {
                // Stop directly when we find an item with a bigger weight. We also
                // have to subtract 1 from the delta in this case, since the delta's
                // are renumbered when rebuilding the form.
                $delta_to_focus--;
                break;
            }
        }
        $response->addCommand(new InvokeCommand("#{$wrapper_id} [data-media-library-item-delta={$delta_to_focus}]", 'focus'));
    }
    elseif ($removed_last || !$is_remove_button && !isset($element['open_button']['#attributes']['data-disabled-focus'])) {
        $response->addCommand(new InvokeCommand("#{$wrapper_id} .js-media-library-open-button", 'focus'));
    }
    return $response;
}

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