public function ImageFormatterLinkToImageStyleFormatter::viewElements in Image formatter link to image style 8

Builds a renderable array for a field value.

Parameters

\Drupal\Core\Field\FieldItemListInterface $items: The field values to be rendered.

string $langcode: The language that should be used to render the field.

Return value

array A renderable array for $items, as an array of child elements keyed by consecutive numeric indexes starting from 0.

Overrides FormatterInterface::viewElements

File

src/Plugin/Field/FieldFormatter/ImageFormatterLinkToImageStyleFormatter.php, line 210

Class

ImageFormatterLinkToImageStyleFormatter

Plugin implementation of the 'image_formatter_link_to_image_style' formatter.

Namespace

Drupal\image_formatter_link_to_image_style\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  $files = $this
    ->getEntitiesToView($items, $langcode);

  // Early opt-out if the field is empty.
  if (empty($files)) {
    return $elements;
  }
  $image_style_setting = $this
    ->getSetting('image_style');

  // Collect cache tags to be added for each item in the field.
  $base_cache_tags = [];
  if (!empty($image_style_setting)) {
    $image_style = $this->imageStyleStorage
      ->load($image_style_setting);
    $base_cache_tags = $image_style
      ->getCacheTags();
  }
  foreach ($files as $delta => $file) {
    $cache_tags = Cache::mergeTags($base_cache_tags, $file
      ->getCacheTags());
    $cache_contexts = [
      'url.site',
    ];

    // Extract field item attributes for the theme function, and unset them
    // from the $item so that the field template does not re-render them.
    $item = $file->_referringItem;
    $item_attributes = $item->_attributes;
    unset($item->_attributes);
    if (!empty($this
      ->getSetting('image_link_image_class'))) {
      if (!isset($item_attributes['class'])) {
        $item_attributes['class'] = [];
      }
      elseif (!is_array($item_attributes['class'])) {
        $item_attributes['class'] = explode(' ', $item_attributes['class']);
      }
      $item_attributes['class'] = array_merge($item_attributes['class'], explode(' ', $this
        ->getSetting('image_link_image_class')));
    }
    if (!empty($this
      ->getSetting('image_link_style'))) {
      $image_link_style = ImageStyle::load($this
        ->getSetting('image_link_style'));
      $image_uri = $image_link_style
        ->buildUrl($file
        ->getFileUri());
    }
    else {
      $image_uri = $file
        ->getFileUri();
    }
    $url = Url::fromUri(file_create_url($image_uri));
    $url_attributes = [];
    if (!empty($this
      ->getSetting('image_link_class'))) {
      $url_attributes['class'] = explode(' ', $this
        ->getSetting('image_link_class'));
    }
    if (!empty($this
      ->getSetting('image_link_rel'))) {
      $url_attributes['rel'] = explode(' ', $this
        ->getSetting('image_link_rel'));
    }
    $elements[$delta] = [
      '#theme' => 'image_formatter_link_to_image_style_formatter',
      '#item' => $item,
      '#item_attributes' => $item_attributes,
      '#url' => $url,
      '#url_attributes' => $url_attributes,
      '#image_style' => $image_style_setting,
      '#cache' => [
        'tags' => $cache_tags,
        'contexts' => $cache_contexts,
      ],
    ];
  }
  return $elements;
}