public function FastlyImageFormatter::viewElements in Fastly 8.3
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/ FastlyImageFormatter.php, line 324
Class
- FastlyImageFormatter
- Plugin implementation of the fastly 'image' formatter.
Namespace
Drupal\fastly\Plugin\Field\FieldFormatterCode
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;
$image_link_setting = $this
->getSetting('image_link');
// Check if the formatter involves a link.
if ($image_link_setting == 'content') {
$entity = $items
->getEntity();
if (!$entity
->isNew()) {
$url = $entity
->toUrl();
}
}
elseif ($image_link_setting == 'file') {
$link_file = TRUE;
}
// Collect cache tags to be added for each item in the field.
$base_cache_tags = [];
foreach ($files as $delta => $file) {
$cache_contexts = [];
if (isset($link_file)) {
$image_uri = $file
->getFileUri();
// @todo Wrap in file_url_transform_relative(). This is currently
// impossible. As a work-around, we currently add the 'url.site' cache
// context to ensure different file URLs are generated for different
// sites in a multisite setup, including HTTP and HTTPS versions of the
// same site. Fix in https://www.drupal.org/node/2646744.
$url = Url::fromUri(file_create_url($image_uri));
$cache_contexts[] = 'url.site';
}
$cache_tags = Cache::mergeTags($base_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;
$item_attributes = $item->_attributes;
unset($item->_attributes);
$settings = $this
->getSettingsForParameters();
$query = [];
foreach ($settings as $option) {
if ($value = $this
->getSetting($option)) {
if ($value && ($option == 'width' || $option == 'height')) {
$item
->set($option, $value);
}
$query[$option] = $value;
}
}
if ($query) {
$uri = $file
->getFileUri();
$image_url = Url::fromUri(file_create_url($uri));
$image_url
->setOption('query', $query);
$file
->setFileUri($image_url
->toUriString());
}
$elements[$delta] = [
'#theme' => 'image_formatter',
'#item' => $item,
'#item_attributes' => $item_attributes,
'#image_style' => '',
'#url' => $url,
'#cache' => [
'tags' => $cache_tags,
'contexts' => $cache_contexts,
],
];
}
return $elements;
}