public function AutoImageStyleDefault::viewElements in Auto 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 ImageFormatter::viewElements

File

src/Plugin/Field/FieldFormatter/AutoImageStyleDefault.php, line 89

Class

AutoImageStyleDefault

Plugin annotation @FieldFormatter( id = "auto_image_style_default", label = @Translation("Image auto orientation"), description = @Translation("Display image fields as portrait or landscape style"), field_types = { "image", } )

Namespace

Drupal\auto_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;
  }

  // Currently no link handling.
  $url = NULL;
  $image_style_landscape_setting = $this
    ->getSetting('image_style_landscape');
  $image_style_portrait_setting = $this
    ->getSetting('image_style_portrait');

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

    // 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;
    $image_style = $image_style_portrait_setting;
    if ($item->height < $item->width) {
      $image_style = $image_style_landscape_setting;
    }
    $item_attributes = $item->_attributes;
    unset($item->_attributes);
    $elements[$delta] = [
      '#theme' => 'image_formatter',
      '#item' => $item,
      '#item_attributes' => $item_attributes,
      '#image_style' => $image_style,
      '#url' => $url,
      '#cache' => [
        'tags' => $cache_tags,
      ],
    ];
  }
  return $elements;
}