www.aleph1.co.uk Git - yaffs-website/blob - web/core/modules/system/tests/modules/form_test/src/Form/FormTestStoragePageCacheForm.php

   1 <?php
   2
   3 namespace Drupal\form_test\Form;
   4
   5 use Drupal\Core\Form\FormBase;
   6 use Drupal\Core\Form\FormStateInterface;
   7
   8 class FormTestStoragePageCacheForm extends FormBase {
   9
  10   /**
  11    * {@inheritdoc}
  12    */
  13   public function getFormId() {
  14     return 'form_test_storage_page_cache';
  15   }
  16
  17   /**
  18    * {@inheritdoc}
  19    */
  20   public function buildForm(array $form, FormStateInterface $form_state) {
  21     $form['title'] = [
  22       '#type' => 'textfield',
  23       '#title' => 'Title',
  24       '#required' => TRUE,
  25     ];
  26
  27     $form['test_build_id_old'] = [
  28       '#type' => 'item',
  29       '#title' => 'Old build id',
  30       '#markup' => 'No old build id',
  31     ];
  32
  33     $form['submit'] = [
  34       '#type' => 'submit',
  35       '#value' => 'Save',
  36     ];
  37
  38     $form['rebuild'] = [
  39       '#type' => 'submit',
  40       '#value' => 'Rebuild',
  41       '#submit' => [[$this, 'form_test_storage_page_cache_rebuild']],
  42     ];
  43
  44     $form['#after_build'] = [[$this, 'form_test_storage_page_cache_old_build_id']];
  45
  46     return $form;
  47   }
  48
  49   /**
  50    * Form element #after_build callback: output the old form build-id.
  51    */
  52   public function form_test_storage_page_cache_old_build_id($form) {
  53     if (isset($form['#build_id_old'])) {
  54       $form['test_build_id_old']['#plain_text'] = $form['#build_id_old'];
  55     }
  56     return $form;
  57   }
  58
  59   /**
  60    * Form submit callback: Rebuild the form and continue.
  61    */
  62   public function form_test_storage_page_cache_rebuild($form, FormStateInterface $form_state) {
  63     $form_state->setRebuild();
  64   }
  65
  66   /**
  67    * {@inheritdoc}
  68    */
  69   public function validateForm(array &$form, FormStateInterface $form_state) {
  70     // Test using form cache when re-displaying a form due to validation
  71     // errors.
  72     if ($form_state->hasAnyErrors()) {
  73       $form_state->setCached();
  74     }
  75   }
  76
  77   /**
  78    * {@inheritdoc}
  79    */
  80   public function submitForm(array &$form, FormStateInterface $form_state) {
  81     // Nothing must happen.
  82   }
  83
  84 }