public function JwplayerFormatter::viewElements in JW Player 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/JwplayerFormatter.php, line 189

Class

JwplayerFormatter

Plugin implementation of the 'foo_formatter' formatter.

Namespace

Drupal\jw_player\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $element = array();
  $settings = $this
    ->getSettings();

  // Prepare preview image.
  $image_style = NULL;
  $image_url = NULL;
  $cache_tags = [];
  if ($settings['preview_image_field']) {
    $split = explode('|', $settings['preview_image_field']);
    $preview_image_field = $split[1];
    if ($preview_items = $items
      ->getEntity()
      ->get($preview_image_field)) {
      if ($image_style = ImageStyle::load($settings['preview_image_style'])) {
        if ($image = $items
          ->getEntity()->{$preview_image_field}->entity) {
          $image_url = $image_style
            ->buildUrl($image
            ->getFileUri());
          $cache_tags = $image_style
            ->getCacheTags();
        }
      }
    }
  }

  // Process files for the theme function.
  foreach ($items as $delta => $item) {
    if ($item->entity) {
      $file_uri = $item->entity
        ->getFileUri();
      $file_mime = $item->entity
        ->getMimeType();
      $uri = file_create_url($file_uri);

      // Add cache tags for the referenced file and the preset if it can be
      // loaded, to prevent fatal errors.
      $tags = Cache::mergeTags($cache_tags, $item->entity
        ->getCacheTags());
    }
    elseif ($this->fieldDefinition
      ->getType() === 'link') {
      $uri = $item->uri;
      $file_mime = FALSE;
      $tags = [];
    }
    else {
      continue;
    }
    if ($preset = $this
      ->loadPreset()) {
      $tags = Cache::mergeTags($tags, $preset
        ->getCacheTags());
    }
    $element[$delta] = [
      'player' => [
        '#type' => 'jw_player',
        '#file' => $item->entity,
        '#file_url' => $uri,
        '#file_mime' => $file_mime,
        '#item' => $item,
        '#preset' => $this
          ->getSetting('jwplayer_preset'),
        // Give each instance of the player a unique id. A random hash is
        // used in place of drupal_html_id() due to potentially conflicting
        // ids in cases where the entire output of the theme function is
        // cached. Prefix with jwplayer, as ID's that start with a number
        // are not valid.
        '#html_id' => 'jwplayer-' . md5(rand()),
      ],
      '#attached' => [
        'library' => [
          'jw_player/jwplayer',
        ],
      ],
      '#cache' => [
        'tags' => $tags,
      ],
    ];

    // Add preview image.
    if ($image_url) {
      $element[$delta]['player']['#settings']['image'] = $image_url;
    }
  }
  return $element;
}