public function PictureFormatter::viewElements

Builds a renderable array for a field value.

Parameters

Drupal\Core\Entity\EntityInterface $entity: The entity being displayed.

string $langcode: The language associated with $items.

array $items: Array of values for this field.

Return value

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

Overrides FormatterInterface::viewElements

File

drupal/core/modules/picture/lib/Drupal/picture/Plugin/field/formatter/PictureFormatter.php, line 118

Contains \Drupal\picture\Plugin\field\formatter\PictureFormatter.

Class

PictureFormatter

Plugin for picture formatter.

Namespace

Code

public function viewElements(EntityInterface $entity, $langcode, array $items) {
  $elements = array();

  // Check if the formatter involves a link.
  if ($this
    ->getSetting('image_link') == 'content') {
    $uri = $entity
      ->uri();
  }
  elseif ($this
    ->getSetting('image_link') == 'file') {
    $link_file = TRUE;
  }
  $breakpoint_styles = array();
  $fallback_image_style = '';
  $picture_mapping = entity_load('picture_mapping', $this
    ->getSetting('picture_mapping'));
  if ($picture_mapping) {
    foreach ($picture_mapping->mappings as $breakpoint_name => $multipliers) {

      // Make sure there are multipliers.
      if (!empty($multipliers)) {

        // Make sure that the breakpoint exists and is enabled.
        // @todo add the following when breakpoint->status is added again:
        // $picture_mapping->breakpointGroup->breakpoints[$breakpoint_name]->status
        if (isset($picture_mapping->breakpointGroup->breakpoints[$breakpoint_name])) {
          $breakpoint = $picture_mapping->breakpointGroup->breakpoints[$breakpoint_name];

          // Determine the enabled multipliers.
          $multipliers = array_intersect_key($multipliers, $breakpoint->multipliers);
          foreach ($multipliers as $multiplier => $image_style) {

            // Make sure the multiplier still exists.
            if (!empty($image_style)) {

              // First mapping found is used as fallback.
              if (empty($fallback_image_style)) {
                $fallback_image_style = $image_style;
              }
              if (!isset($breakpoint_styles[$breakpoint_name])) {
                $breakpoint_styles[$breakpoint_name] = array();
              }
              $breakpoint_styles[$breakpoint_name][$multiplier] = $image_style;
            }
          }
        }
      }
    }
  }

  // Check if the user defined a custom fallback image style.
  if ($this
    ->getSetting('fallback_image_style')) {
    $fallback_image_style = $this
      ->getSetting('fallback_image_style');
  }
  foreach ($items as $delta => $item) {
    if (isset($link_file)) {
      $uri = array(
        'path' => file_create_url($item['uri']),
        'options' => array(),
      );
    }
    $elements[$delta] = array(
      '#theme' => 'picture_formatter',
      '#attached' => array(
        'library' => array(
          array(
            'picture',
            'picturefill',
          ),
        ),
      ),
      '#item' => $item,
      '#image_style' => $fallback_image_style,
      '#breakpoints' => $breakpoint_styles,
      '#path' => isset($uri) ? $uri : '',
    );
  }
  return $elements;
}