public function EditorMediaDialog::buildForm in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/media/src/Form/EditorMediaDialog.php \Drupal\media\Form\EditorMediaDialog::buildForm()

Parameters

\Drupal\editor\EditorInterface $editor: The text editor to which this dialog corresponds.

Overrides FormInterface::buildForm

File

core/modules/media/src/Form/EditorMediaDialog.php, line 83

Class

EditorMediaDialog

Provides a media embed dialog for text editors.

Namespace

Drupal\media\Form

Code

public function buildForm(array $form, FormStateInterface $form_state, EditorInterface $editor = NULL) {

  // This form is special, in that the default values do not come from the
  // server side, but from the client side, from a text editor. We must cache
  // this data in form state, because when the form is rebuilt, we will be
  // receiving values from the form, instead of the values from the text
  // editor. If we don't cache it, this data will be lost. By convention,
  // the data that the text editor sends to any dialog is in the
  // 'editor_object' key.
  if (isset($form_state
    ->getUserInput()['editor_object'])) {
    $editor_object = $form_state
      ->getUserInput()['editor_object'];

    // The data that the text editor sends to any dialog is in
    // the 'editor_object' key.
    // @see core/modules/ckeditor/js/ckeditor.es6.js
    $media_embed_element = $editor_object['attributes'];
    $form_state
      ->set('media_embed_element', $media_embed_element);
    $has_caption = $editor_object['hasCaption'];
    $form_state
      ->set('hasCaption', $has_caption)
      ->setCached(TRUE);
  }
  else {

    // Retrieve the user input from form state.
    $media_embed_element = $form_state
      ->get('media_embed_element');
    $has_caption = $form_state
      ->get('hasCaption');
  }
  $form['#tree'] = TRUE;
  $form['#attached']['library'][] = 'editor/drupal.editor.dialog';
  $form['#prefix'] = '<div id="editor-media-dialog-form">';
  $form['#suffix'] = '</div>';
  $filters = $editor
    ->getFilterFormat()
    ->filters();
  $filter_html = $filters
    ->get('filter_html');
  $filter_align = $filters
    ->get('filter_align');
  $filter_caption = $filters
    ->get('filter_caption');
  $media_embed_filter = $filters
    ->get('media_embed');
  $allowed_attributes = [];
  if ($filter_html->status) {
    $restrictions = $filter_html
      ->getHTMLRestrictions();
    $allowed_attributes = $restrictions['allowed']['drupal-media'];
  }
  $media = $this->entityRepository
    ->loadEntityByUuid('media', $media_embed_element['data-entity-uuid']);
  if ($image_field_name = $this
    ->getMediaImageSourceFieldName($media)) {

    // We'll want the alt text from the same language as the host.
    if (!empty($editor_object['hostEntityLangcode']) && $media
      ->hasTranslation($editor_object['hostEntityLangcode'])) {
      $media = $media
        ->getTranslation($editor_object['hostEntityLangcode']);
    }
    $settings = $media->{$image_field_name}
      ->getItemDefinition()
      ->getSettings();
    $alt = isset($media_embed_element['alt']) ? $media_embed_element['alt'] : NULL;
    $form['alt'] = [
      '#type' => 'textfield',
      '#title' => $this
        ->t('Alternate text'),
      '#default_value' => $alt,
      '#description' => $this
        ->t('Short description of the image used by screen readers and displayed when the image is not loaded. This is important for accessibility.'),
      '#required_error' => $this
        ->t('Alternative text is required.<br />(Only in rare cases should this be left empty. To create empty alternative text, enter <code>""</code> — two double quotes without any content).'),
      '#maxlength' => 2048,
      '#placeholder' => $media->{$image_field_name}->alt,
      '#parents' => [
        'attributes',
        'alt',
      ],
      '#access' => !empty($settings['alt_field']) && ($filter_html->status === FALSE || !empty($allowed_attributes['alt'])),
    ];
  }

  // When Drupal core's filter_align is being used, the text editor offers the
  // ability to change the alignment.
  $form['align'] = [
    '#title' => $this
      ->t('Align'),
    '#type' => 'radios',
    '#options' => [
      'none' => $this
        ->t('None'),
      'left' => $this
        ->t('Left'),
      'center' => $this
        ->t('Center'),
      'right' => $this
        ->t('Right'),
    ],
    '#default_value' => empty($media_embed_element['data-align']) ? 'none' : $media_embed_element['data-align'],
    '#attributes' => [
      'class' => [
        'container-inline',
      ],
    ],
    '#parents' => [
      'attributes',
      'data-align',
    ],
    '#access' => $filter_align->status && ($filter_html->status === FALSE || !empty($allowed_attributes['data-align'])),
  ];

  // When Drupal core's filter_caption is being used, the text editor offers
  // the ability to in-place edit the media's caption: show a toggle.
  $form['caption'] = [
    '#title' => $this
      ->t('Caption'),
    '#type' => 'checkbox',
    '#default_value' => $has_caption === 'true',
    '#parents' => [
      'hasCaption',
    ],
    '#access' => $filter_caption->status && ($filter_html->status === FALSE || !empty($allowed_attributes['data-caption'])),
  ];
  $view_mode_options = array_intersect_key($this->entityDisplayRepository
    ->getViewModeOptions('media'), $media_embed_filter->settings['allowed_view_modes']);
  $default_view_mode = static::getViewModeDefaultValue($view_mode_options, $media_embed_filter, $media_embed_element['data-view-mode'] ?? NULL);
  $form['view_mode'] = [
    '#title' => $this
      ->t("Display"),
    '#type' => 'select',
    '#options' => $view_mode_options,
    '#default_value' => $default_view_mode,
    '#parents' => [
      'attributes',
      'data-view-mode',
    ],
    '#access' => count($view_mode_options) >= 2,
  ];

  // Store the default from the MediaEmbed filter, so that if the selected
  // view mode matches the default, we can drop the 'data-view-mode'
  // attribute.
  $form_state
    ->set('filter_default_view_mode', $media_embed_filter->settings['default_view_mode']);
  if ((empty($form['alt']) || $form['alt']['#access'] === FALSE) && $form['align']['#access'] === FALSE && $form['caption']['#access'] === FALSE && $form['view_mode']['#access'] === FALSE) {
    $format = $editor
      ->getFilterFormat();
    $warning = $this
      ->t('There is nothing to configure for this media.');
    $form['no_access_notice'] = [
      '#markup' => $warning,
    ];
    if ($format
      ->access('update')) {
      $tparams = [
        '@warning' => $warning,
        '@edit_url' => $format
          ->toUrl('edit-form')
          ->toString(),
        '%format' => $format
          ->label(),
      ];
      $form['no_access_notice']['#markup'] = $this
        ->t('@warning <a href="@edit_url">Edit the text format %format</a> to modify the attributes that can be overridden.', $tparams);
    }
  }
  $form['actions'] = [
    '#type' => 'actions',
  ];
  $form['actions']['save_modal'] = [
    '#type' => 'submit',
    '#value' => $this
      ->t('Save'),
    // No regular submit-handler. This form only works via JavaScript.
    '#submit' => [],
    '#ajax' => [
      'callback' => '::submitForm',
      'event' => 'click',
    ],
    // Prevent this hidden element from being tabbable.
    '#attributes' => [
      'tabindex' => -1,
    ],
  ];
  return $form;
}