public function AutoImageStyleMediaResponsive::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 ResponsiveImageFormatter::viewElements

File

src/Plugin/Field/FieldFormatter/AutoImageStyleMediaResponsive.php, line 149

Class

AutoImageStyleMediaResponsive

Plugin for responsive media image formatter.

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;
  }
  $url = NULL;

  // Check if the formatter involves a link.
  if ($this
    ->getSetting('image_link') == 'content') {
    $entity = $items
      ->getEntity();
    if (!$entity
      ->isNew()) {
      $url = $entity
        ->toUrl();
    }
  }
  elseif ($this
    ->getSetting('image_link') == 'file') {
    $link_file = TRUE;
  }

  // Collect cache tags to be added for each item in the field.
  $cache_tags = [];
  $image_styles_to_load = [];
  $responsive_image_style_landscape = $this->responsiveImageStyleStorage
    ->load($this
    ->getSetting('responsive_image_style_landscape'));
  if ($responsive_image_style_landscape) {
    $cache_tags = Cache::mergeTags($cache_tags, $responsive_image_style_landscape
      ->getCacheTags());
    $image_styles_to_load = $responsive_image_style_landscape
      ->getImageStyleIds();
  }
  $image_styles = $this->imageStyleStorage
    ->loadMultiple($image_styles_to_load);
  foreach ($image_styles as $image_style) {
    $cache_tags = Cache::mergeTags($cache_tags, $image_style
      ->getCacheTags());
  }
  $responsive_image_style_portrait = $this->responsiveImageStyleStorage
    ->load($this
    ->getSetting('responsive_image_style_portrait'));
  if ($responsive_image_style_portrait) {
    $cache_tags = Cache::mergeTags($cache_tags, $responsive_image_style_portrait
      ->getCacheTags());
    $image_styles_to_load = $responsive_image_style_portrait
      ->getImageStyleIds();
  }
  $image_styles = $this->imageStyleStorage
    ->loadMultiple($image_styles_to_load);
  foreach ($image_styles as $image_style) {
    $cache_tags = Cache::mergeTags($cache_tags, $image_style
      ->getCacheTags());
  }
  foreach ($files as $delta => $file) {
    $cache_tags = Cache::mergeTags($cache_tags, $file
      ->getCacheTags());

    // Link the <picture> element to the original file.
    if (isset($link_file)) {
      $url = file_url_transform_relative(file_create_url($file
        ->getFileUri()));
    }

    // 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;
    $responsive_image_style = $responsive_image_style_portrait;
    if ($item->height < $item->width) {
      $responsive_image_style = $responsive_image_style_landscape;
    }
    $elements[$delta] = [
      '#theme' => 'responsive_image_formatter',
      '#item' => $item,
      '#responsive_image_style_id' => $responsive_image_style ? $responsive_image_style
        ->id() : '',
      '#url' => $url,
      '#cache' => [
        'tags' => $cache_tags,
      ],
    ];
  }
  return $elements;
}