function ResponsiveImageFormatter::settingsForm

Overrides FormatterBase::settingsForm

File

core/modules/responsive_image/src/Plugin/Field/FieldFormatter/ResponsiveImageFormatter.php, line 128

Class

ResponsiveImageFormatter

Plugin for responsive image formatter.

Namespace

Code

public function settingsForm(array $form, FormStateInterface $form_state) {
  $elements = parent::settingsForm($form, $form_state);
  $responsive_image_options = [];
  $responsive_image_styles = $this->responsiveImageStyleStorage
    ->loadMultiple();
  uasort($responsive_image_styles, '\\Drupal\\responsive_image\\Entity\\ResponsiveImageStyle::sort');
  if ($responsive_image_styles && !empty($responsive_image_styles)) {
    foreach ($responsive_image_styles as $machine_name => $responsive_image_style) {
      if ($responsive_image_style->hasImageStyleMappings()) {
        $responsive_image_options[$machine_name] = $responsive_image_style->label();
      }
    }
  }
  $elements['responsive_image_style'] = [
    '#title' => $this->t('Responsive image style'),
    '#type' => 'select',
    '#default_value' => $this->getSetting('responsive_image_style') ?: NULL,
    '#required' => TRUE,
    '#options' => $responsive_image_options,
    '#description' => [
      '#markup' => $this->linkGenerator
        ->generate($this->t('Configure Responsive Image Styles'), new Url('entity.responsive_image_style.collection')),
      '#access' => $this->currentUser
        ->hasPermission('administer responsive image styles'),
    ],
  ];
  $image_loading = $this->getSetting('image_loading');
  $elements['image_loading'] = [
    '#type' => 'details',
    '#title' => $this->t('Image loading'),
    '#weight' => 10,
    '#description' => $this->t('Lazy render images with native image loading attribute (<em>loading="lazy"</em>). This improves performance by allowing browsers to lazily load images. See <a href="@url">Lazy loading</a>.', [
      '@url' => 'https://developer.mozilla.org/en-US/docs/Web/Performance/Lazy_loading#images_and_iframes',
    ]),
  ];
  $loading_attribute_options = [
    'lazy' => $this->t('Lazy'),
    'eager' => $this->t('Eager'),
  ];
  $elements['image_loading']['attribute'] = [
    '#title' => $this->t('Lazy loading attribute'),
    '#type' => 'select',
    '#default_value' => $image_loading['attribute'],
    '#options' => $loading_attribute_options,
    '#description' => $this->t('Select the lazy loading attribute for images. <a href=":link">Learn more.</a>', [
      ':link' => 'https://html.spec.whatwg.org/multipage/urls-and-fetching.html#lazy-loading-attributes',
    ]),
  ];
  $link_types = [
    'content' => $this->t('Content'),
    'file' => $this->t('File'),
  ];
  $elements['image_link'] = [
    '#title' => $this->t('Link image to'),
    '#type' => 'select',
    '#default_value' => $this->getSetting('image_link'),
    '#empty_option' => $this->t('Nothing'),
    '#options' => $link_types,
  ];
  return $elements;
}