function views_ui_add_limited_validation

Processes a non-JavaScript fallback submit button to limit its validation errors.

File

core/modules/views_ui/admin.inc, line 122

Code

function views_ui_add_limited_validation($element, FormStateInterface $form_state) {
    // Retrieve the AJAX triggering element so we can determine its parents. (We
    // know it's at the same level of the complete form array as the submit
    // button, so all we have to do to find it is swap out the submit button's
    // last array parent.)
    $array_parents = $element['#array_parents'];
    array_pop($array_parents);
    $array_parents[] = $element['#views_ui_ajax_data']['trigger_key'];
    $ajax_triggering_element = NestedArray::getValue($form_state->getCompleteForm(), $array_parents);
    // Limit this button's validation to the AJAX triggering element, so it can
    // update the form for that change without requiring that the rest of the
    // form be filled out properly yet.
    $element['#limit_validation_errors'] = [
        $ajax_triggering_element['#parents'],
    ];
    // If we are in the process of a form submission and this is the button that
    // was clicked, the form API workflow in \Drupal::formBuilder()->doBuildForm()
    // will have already copied it to $form_state->getTriggeringElement() before
    // our #process function is run. So we need to make the same modifications in
    // $form_state as we did to the element itself, to ensure that
    // #limit_validation_errors will actually be set in the correct place.
    $clicked_button =& $form_state->getTriggeringElement();
    if ($clicked_button && $clicked_button['#name'] == $element['#name'] && $clicked_button['#value'] == $element['#value']) {
        $clicked_button['#limit_validation_errors'] = $element['#limit_validation_errors'];
    }
    return $element;
}