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<?php
/**
* @file
* Contains \Drupal\responsive_image\Plugin\field\formatter\ResponsiveImageFormatter.
namespace Drupal\responsive_image\Plugin\Field\FieldFormatter;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Field\FieldDefinitionInterface;
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use Drupal\Core\Field\FieldItemListInterface;
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use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Url;
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use Drupal\image\Plugin\Field\FieldFormatter\ImageFormatterBase;
use Symfony\Component\DependencyInjection\ContainerInterface;
* Plugin for responsive image formatter.
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* @FieldFormatter(
* id = "responsive_image",
* label = @Translation("Responsive image"),
* field_types = {
* "image",
* }
* )
*/
class ResponsiveImageFormatter extends ImageFormatterBase implements ContainerFactoryPluginInterface {
/**
* @var EntityStorageInterface
*/
protected $responsiveImageStyleStorage;
/*
* The image style entity storage.
*
* @var \Drupal\Core\Entity\EntityStorageInterface
*/
protected $imageStyleStorage;
/**
* Constructs a ResponsiveImageFormatter object.
*
* @param string $plugin_id
* The plugin_id for the formatter.
* @param mixed $plugin_definition
* The plugin implementation definition.
* @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
* The definition of the field to which the formatter is associated.
* @param array $settings
* The formatter settings.
* @param string $label
* The formatter label display setting.
* @param string $view_mode
* The view mode.
* @param array $third_party_settings
* Any third party settings.
* @param \Drupal\Core\Entity\EntityStorageInterface $responsive_image_style_storage
* The responsive image style storage.
* @param \Drupal\Core\Entity\EntityStorageInterface $image_style_storage
* The image style storage.
*/
public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings, EntityStorageInterface $responsive_image_style_storage, EntityStorageInterface $image_style_storage) {
parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode, $third_party_settings);
$this->responsiveImageStyleStorage = $responsive_image_style_storage;
$this->imageStyleStorage = $image_style_storage;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static(
$plugin_id,
$plugin_definition,
$configuration['field_definition'],
$configuration['settings'],
$configuration['label'],
$configuration['view_mode'],
$configuration['third_party_settings'],
$container->get('entity.manager')->getStorage('responsive_image_style'),
$container->get('entity.manager')->getStorage('image_style')
);
}
/**
* {@inheritdoc}
*/
public static function defaultSettings() {
return array(
'responsive_image_style' => '',
'image_link' => '',
) + parent::defaultSettings();
}
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* {@inheritdoc}
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public function settingsForm(array $form, FormStateInterface $form_state) {
$responsive_image_options = array();
$responsive_image_styles = $this->responsiveImageStyleStorage->loadMultiple();
if ($responsive_image_styles && !empty($responsive_image_styles)) {
foreach ($responsive_image_styles as $machine_name => $responsive_image_style) {
if ($responsive_image_style->hasImageStyleMappings()) {
$responsive_image_options[$machine_name] = $responsive_image_style->label();
$elements['responsive_image_style'] = array(
'#title' => t('Responsive image style'),
'#type' => 'select',
'#default_value' => $this->getSetting('responsive_image_style'),
'#required' => TRUE,
'#options' => $responsive_image_options,
);
$link_types = array(
'content' => t('Content'),
'file' => t('File'),
);
$elements['image_link'] = array(
'#title' => t('Link image to'),
'#type' => 'select',
'#default_value' => $this->getSetting('image_link'),
'#empty_option' => t('Nothing'),
'#options' => $link_types,
);
return $elements;
}
/**
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* {@inheritdoc}
*/
public function settingsSummary() {
$summary = array();
$responsive_image_style = $this->responsiveImageStyleStorage->load($this->getSetting('responsive_image_style'));
if ($responsive_image_style) {
$summary[] = t('Responsive image style: @responsive_image_style', array('@responsive_image_style' => $responsive_image_style->label()));
$link_types = array(
'content' => t('Linked to content'),
'file' => t('Linked to file'),
);
// Display this setting only if image is linked.
if (isset($link_types[$this->getSetting('image_link')])) {
$summary[] = $link_types[$this->getSetting('image_link')];
}
}
else {
$summary[] = t('Select a responsive image style.');
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return $summary;
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* {@inheritdoc}
public function viewElements(FieldItemListInterface $items) {
$elements = array();
$files = $this->getEntitiesToView($items);
// 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') {
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$entity = $items->getEntity();
if (!$entity->isNew()) {
$url = $entity->urlInfo();
}
}
elseif ($this->getSetting('image_link') == 'file') {
$link_file = TRUE;
}
// Collect cache tags to be added for each item in the field.
$responsive_image_style = $this->responsiveImageStyleStorage->load($this->getSetting('responsive_image_style'));
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$image_styles_to_load = array();
$cache_tags = [];
if ($responsive_image_style) {
$cache_tags = Cache::mergeTags($cache_tags, $responsive_image_style->getCacheTags());
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$image_styles_to_load = $responsive_image_style->getImageStyleIds();
}
$image_styles = $this->imageStyleStorage->loadMultiple($image_styles_to_load);
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foreach ($image_styles as $image_style) {
$cache_tags = Cache::mergeTags($cache_tags, $image_style->getCacheTags());
}
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foreach ($files as $delta => $file) {
// Link the <picture> element to the original file.
if (isset($link_file)) {
$url = Url::fromUri(file_create_url($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;
$item_attributes = $item->_attributes;
unset($item->_attributes);
$elements[$delta] = array(
'#theme' => 'responsive_image_formatter',
'#item' => $item,
'#item_attributes' => $item_attributes,
'#responsive_image_style_id' => $responsive_image_style ? $responsive_image_style->id() : '',
'#url' => $url,
'#cache' => array(
'tags' => $cache_tags,
),
);
}
return $elements;
}
}