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				|  |  | +<?php
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				|  |  | +
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				|  |  | +namespace Drupal\vue_link_formatter\Plugin\Field\FieldFormatter;
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				|  |  | +
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				|  |  | +use Drupal\Core\Entity\EntityStorageInterface;
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				|  |  | +use Drupal\Core\Field\FieldItemListInterface;
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				|  |  | +use Drupal\Core\Field\FieldDefinitionInterface;
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				|  |  | +use Drupal\Core\Link;
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				|  |  | +use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
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				|  |  | +use Drupal\Core\Session\AccountInterface;
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				|  |  | +use Drupal\Core\Url;
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				|  |  | +use Drupal\image\Entity\ImageStyle;
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				|  |  | +use Symfony\Component\DependencyInjection\ContainerInterface;
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				|  |  | +use Drupal\Core\Form\FormStateInterface;
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				|  |  | +use Drupal\Core\Cache\Cache;
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				|  |  | +use Drupal\image\Plugin\Field\FieldFormatter\ImageFormatter;
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				|  |  | +
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				|  |  | +/**
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				|  |  | + * Plugin implementation of the 'image' formatter with vuejs attributes.
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				|  |  | + *
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				|  |  | + * @FieldFormatter(
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				|  |  | + *   id = "vueimage",
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				|  |  | + *   label = @Translation("Vue Image"),
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				|  |  | + *   field_types = {
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				|  |  | + *     "image"
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				|  |  | + *   },
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				|  |  | + *   quickedit = {
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				|  |  | + *     "editor" = "image"
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				|  |  | + *   }
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				|  |  | + * )
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				|  |  | + */
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				|  |  | +class VueImageFormatter extends ImageFormatter {
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				|  |  | +
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				|  |  | +  /**
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				|  |  | +   * {@inheritdoc}
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				|  |  | +   */
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				|  |  | +  public function viewElements(FieldItemListInterface $items, $langcode) {
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				|  |  | +    $elements = [];
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				|  |  | +    $files = $this->getEntitiesToView($items, $langcode);
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				|  |  | +
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				|  |  | +    // Early opt-out if the field is empty.
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				|  |  | +    if (empty($files)) {
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				|  |  | +      return $elements;
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				|  |  | +    }
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				|  |  | +
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				|  |  | +    $url = NULL;
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				|  |  | +    $image_link_setting = $this->getSetting('image_link');
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				|  |  | +    // Check if the formatter involves a link.
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				|  |  | +    if ($image_link_setting == 'content') {
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				|  |  | +      $entity = $items->getEntity();
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				|  |  | +      if (!$entity->isNew()) {
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				|  |  | +        $url = $entity->toUrl();
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				|  |  | +        $url->setOption('attributes', array(
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				|  |  | +          '@click.prevent' => 'onClickLink',
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				|  |  | +          'data-id' => $entity->id(),
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				|  |  | +          'data-entity-type' => $entity->getEntityTypeId(),
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				|  |  | +          'data-bundle' => $entity->bundle(),
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				|  |  | +        ));
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				|  |  | +      }
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				|  |  | +    }
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				|  |  | +    elseif ($image_link_setting == 'file') {
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				|  |  | +      $link_file = TRUE;
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				|  |  | +    }
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				|  |  | +
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				|  |  | +    $image_style_setting = $this->getSetting('image_style');
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				|  |  | +
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				|  |  | +    // Collect cache tags to be added for each item in the field.
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				|  |  | +    $base_cache_tags = [];
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				|  |  | +    if (!empty($image_style_setting)) {
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				|  |  | +      $image_style = $this->imageStyleStorage->load($image_style_setting);
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				|  |  | +      $base_cache_tags = $image_style->getCacheTags();
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				|  |  | +    }
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				|  |  | +
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				|  |  | +    foreach ($files as $delta => $file) {
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				|  |  | +      $cache_contexts = [];
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				|  |  | +      if (isset($link_file)) {
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				|  |  | +        $image_uri = $file->getFileUri();
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				|  |  | +        // @todo Wrap in file_url_transform_relative(). This is currently
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				|  |  | +        // impossible. As a work-around, we currently add the 'url.site' cache
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				|  |  | +        // context to ensure different file URLs are generated for different
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				|  |  | +        // sites in a multisite setup, including HTTP and HTTPS versions of the
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				|  |  | +        // same site. Fix in https://www.drupal.org/node/2646744.
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				|  |  | +        $url = Url::fromUri(file_create_url($image_uri));
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				|  |  | +        $cache_contexts[] = 'url.site';
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				|  |  | +      }
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				|  |  | +      $cache_tags = Cache::mergeTags($base_cache_tags, $file->getCacheTags());
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				|  |  | +
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				|  |  | +      // Extract field item attributes for the theme function, and unset them
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				|  |  | +      // from the $item so that the field template does not re-render them.
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				|  |  | +      $item = $file->_referringItem;
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				|  |  | +      $item_attributes = $item->_attributes;
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				|  |  | +      unset($item->_attributes);
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				|  |  | +
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				|  |  | +      $elements[$delta] = [
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				|  |  | +        '#theme' => 'image_formatter',
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				|  |  | +        '#item' => $item,
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				|  |  | +        '#item_attributes' => $item_attributes,
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				|  |  | +        '#image_style' => $image_style_setting,
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				|  |  | +        '#url' => $url,
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				|  |  | +        '#cache' => [
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				|  |  | +          'tags' => $cache_tags,
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				|  |  | +          'contexts' => $cache_contexts,
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				|  |  | +        ],
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				|  |  | +      ];
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				|  |  | +    }
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				|  |  | +
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				|  |  | +    return $elements;
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				|  |  | +  }
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				|  |  | +
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				|  |  | +}
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