public function NodePreviewForm::buildForm in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/node/src/Form/NodePreviewForm.php \Drupal\node\Form\NodePreviewForm::buildForm()

Form constructor.

Parameters

array $form: An associative array containing the structure of the form.

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

\Drupal\Core\Entity\EntityInterface $node: The node being previews

Return value

array The form structure.

Overrides FormInterface::buildForm

File

core/modules/node/src/Form/NodePreviewForm.php, line 86

Class

NodePreviewForm

Contains a form for switching the view mode of a node during preview.

Namespace

Drupal\node\Form

Code

public function buildForm(array $form, FormStateInterface $form_state, EntityInterface $node = NULL) {
  $view_mode = $node->preview_view_mode;
  $query_options = [
    'query' => [
      'uuid' => $node
        ->uuid(),
    ],
  ];
  $query = $this
    ->getRequest()->query;
  if ($query
    ->has('destination')) {
    $query_options['query']['destination'] = $query
      ->get('destination');
  }
  $form['backlink'] = [
    '#type' => 'link',
    '#title' => $this
      ->t('Back to content editing'),
    '#url' => $node
      ->isNew() ? Url::fromRoute('node.add', [
      'node_type' => $node
        ->bundle(),
    ]) : $node
      ->toUrl('edit-form'),
    '#options' => [
      'attributes' => [
        'class' => [
          'node-preview-backlink',
        ],
      ],
    ] + $query_options,
  ];

  // Always show full as an option, even if the display is not enabled.
  $view_mode_options = [
    'full' => $this
      ->t('Full'),
  ] + $this->entityDisplayRepository
    ->getViewModeOptionsByBundle('node', $node
    ->bundle());

  // Unset view modes that are not used in the front end.
  unset($view_mode_options['default']);
  unset($view_mode_options['rss']);
  unset($view_mode_options['search_index']);
  $form['uuid'] = [
    '#type' => 'value',
    '#value' => $node
      ->uuid(),
  ];
  $form['view_mode'] = [
    '#type' => 'select',
    '#title' => $this
      ->t('View mode'),
    '#options' => $view_mode_options,
    '#default_value' => $view_mode,
    '#attributes' => [
      'data-drupal-autosubmit' => TRUE,
    ],
  ];
  $form['submit'] = [
    '#type' => 'submit',
    '#value' => $this
      ->t('Switch'),
    '#attributes' => [
      'class' => [
        'js-hide',
      ],
    ],
  ];
  return $form;
}