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class ImageStyleImageFormatter in Field Image Style 8

Plugin implementation of the 'image_style_formatter' formatter.

Plugin annotation


@FieldFormatter(
  id = "image_style_image_formatter",
  label = @Translation("Field Image Style formatter"),
  field_types = {
    "image"
  }
)

Hierarchy

Expanded class hierarchy of ImageStyleImageFormatter

File

src/Plugin/Field/FieldFormatter/ImageStyleImageFormatter.php, line 23

Namespace

Drupal\field_image_style\Plugin\Field\FieldFormatter
View source 
class ImageStyleImageFormatter extends ImageFormatter {

  /**
   * {@inheritdoc}
   */
  public static function defaultSettings() {
    return array(
      'field_image_style' => '',
    ) + parent::defaultSettings();
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, FormStateInterface $form_state) {
    $options = array();

    // @todo: find a way to get all image_style fields of the current entity bundle
    $entityfieldmanager = \Drupal::service('entity_field.manager');
    $fields_image_style = $entityfieldmanager
      ->getFieldMapByFieldType('image_style');
    $fields_image_style = array_intersect_key($fields_image_style[$form['#entity_type']], array_flip($form['#fields']));
    foreach ($fields_image_style as $field_name => $info) {
      if (in_array($form['#bundle'], $info['bundles'])) {
        $options[$field_name] = $field_name;
      }
    }
    $element['field_image_style'] = array(
      '#title' => t('Field image style'),
      '#type' => 'select',
      '#default_value' => $this
        ->getSetting('field_image_style'),
      '#empty_option' => t('None (original image)'),
      '#options' => $options,
    );
    $link_types = array(
      'content' => t('Content'),
      'file' => t('File'),
    );
    $element['image_link'] = array(
      '#title' => t('Link image to'),
      '#type' => 'select',
      '#default_value' => $this
        ->getSetting('image_link'),
      '#empty_option' => t('Nothing'),
      '#options' => $link_types,
    );
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsSummary() {
    $summary = array();
    $field_image_style_setting = $this
      ->getSetting('field_image_style');
    if ($field_image_style_setting) {
      $summary[] = t('Image style from field: @field_name', array(
        '@field_name' => $field_image_style_setting,
      ));
    }
    else {
      $summary[] = t('Original image');
    }
    $link_types = array(
      'content' => t('Linked to content'),
      'file' => t('Linked to file'),
    );

    // Display this setting only if image is linked.
    $image_link_setting = $this
      ->getSetting('image_link');
    if (isset($link_types[$image_link_setting])) {
      $summary[] = $link_types[$image_link_setting];
    }
    return $summary;
  }

  /**
   * {@inheritdoc}
   */
  public function viewElements(FieldItemListInterface $items, $langcode) {
    $elements = array();
    $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;
    }

    // Get image style from image style field
    $image_style_setting = NULL;
    if ($field_image_style_name = $this
      ->getSetting('field_image_style')) {
      $entity = $items
        ->getEntity();
      if (isset($entity->{$field_image_style_name})) {
        $image_style_setting = $entity->{$field_image_style_name}->value;
      }
    }

    // Collect cache tags to be added for each item in the field.
    $cache_tags = array();
    if (!empty($image_style_setting)) {
      $image_style = $this->imageStyleStorage
        ->load($image_style_setting);
      $cache_tags = $image_style
        ->getCacheTags();
    }
    foreach ($files as $delta => $file) {
      if (isset($link_file)) {
        $image_uri = $file
          ->getFileUri();
        $url = Url::fromUri(file_create_url($image_uri));
      }
      $cache_tags = Cache::mergeTags($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);
      $elements[$delta] = array(
        '#theme' => 'image_formatter',
        '#item' => $item,
        '#item_attributes' => $item_attributes,
        '#image_style' => $image_style_setting,
        '#url' => $url,
        '#cache' => array(
          'tags' => $cache_tags,
        ),
      );
    }
    return $elements;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
DependencySerializationTrait::$_entityStorages protected property An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
EntityReferenceFormatterBase::prepareView public function Loads the entities referenced in that field across all the entities being viewed. Overrides FormatterBase::prepareView
EntityReferenceFormatterBase::view public function Overrides FormatterBase::view
FileFormatterBase::checkAccess protected function Checks access to the given entity. Overrides EntityReferenceFormatterBase::checkAccess
FileFormatterBase::needsEntityLoad protected function Returns whether the entity referenced by an item needs to be loaded. Overrides EntityReferenceFormatterBase::needsEntityLoad 1
FormatterBase::$fieldDefinition protected property The field definition.
FormatterBase::$label protected property The label display setting.
FormatterBase::$settings protected property The formatter settings. Overrides PluginSettingsBase::$settings
FormatterBase::$viewMode protected property The view mode.
FormatterBase::getFieldSetting protected function Returns the value of a field setting.
FormatterBase::getFieldSettings protected function Returns the array of field settings.
FormatterBase::isApplicable public static function Returns if the formatter can be used for the provided field. Overrides FormatterInterface::isApplicable 14
ImageFormatter::$currentUser protected property The current user.
ImageFormatter::$imageStyleStorage protected property The image style entity storage.
ImageFormatter::calculateDependencies public function Calculates dependencies for the configured plugin. Overrides PluginSettingsBase::calculateDependencies
ImageFormatter::create public static function Creates an instance of the plugin. Overrides FormatterBase::create 1
ImageFormatter::onDependencyRemoval public function Informs the plugin that some configuration it depends on will be deleted. Overrides PluginSettingsBase::onDependencyRemoval
ImageFormatter::__construct public function Constructs an ImageFormatter object. Overrides FormatterBase::__construct 1
ImageFormatterBase::getEntitiesToView protected function Returns the referenced entities for display. Overrides EntityReferenceFormatterBase::getEntitiesToView
ImageStyleImageFormatter::defaultSettings public static function Defines the default settings for this plugin. Overrides ImageFormatter::defaultSettings
ImageStyleImageFormatter::settingsForm public function Returns a form to configure settings for the formatter. Overrides ImageFormatter::settingsForm
ImageStyleImageFormatter::settingsSummary public function Returns a short summary for the current formatter settings. Overrides ImageFormatter::settingsSummary
ImageStyleImageFormatter::viewElements public function Builds a renderable array for a field value. Overrides ImageFormatter::viewElements
MessengerTrait::$messenger protected property The messenger. 29
MessengerTrait::messenger public function Gets the messenger. 29
MessengerTrait::setMessenger public function Sets the messenger.
PluginBase::$configuration protected property Configuration information passed into the plugin. 1
PluginBase::$pluginDefinition protected property The plugin implementation definition. 1
PluginBase::$pluginId protected property The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR constant A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId public function Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId public function Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition public function Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition 3
PluginBase::getPluginId public function Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable public function Determines if the plugin is configurable.
PluginSettingsBase::$defaultSettingsMerged protected property Whether default settings have been merged into the current $settings.
PluginSettingsBase::$thirdPartySettings protected property The plugin settings injected by third party modules.
PluginSettingsBase::getSetting public function Returns the value of a setting, or its default value if absent. Overrides PluginSettingsInterface::getSetting
PluginSettingsBase::getSettings public function Returns the array of settings, including defaults for missing settings. Overrides PluginSettingsInterface::getSettings
PluginSettingsBase::getThirdPartyProviders public function Gets the list of third parties that store information. Overrides ThirdPartySettingsInterface::getThirdPartyProviders
PluginSettingsBase::getThirdPartySetting public function Gets the value of a third-party setting. Overrides ThirdPartySettingsInterface::getThirdPartySetting
PluginSettingsBase::getThirdPartySettings public function Gets all third-party settings of a given module. Overrides ThirdPartySettingsInterface::getThirdPartySettings
PluginSettingsBase::mergeDefaults protected function Merges default settings values into $settings.
PluginSettingsBase::setSetting public function Sets the value of a setting for the plugin. Overrides PluginSettingsInterface::setSetting
PluginSettingsBase::setSettings public function Sets the settings for the plugin. Overrides PluginSettingsInterface::setSettings
PluginSettingsBase::setThirdPartySetting public function Sets the value of a third-party setting. Overrides ThirdPartySettingsInterface::setThirdPartySetting
PluginSettingsBase::unsetThirdPartySetting public function Unsets a third-party setting. Overrides ThirdPartySettingsInterface::unsetThirdPartySetting
StringTranslationTrait::$stringTranslation protected property The string translation service. 1
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language.