class FieldConfigEditForm

Same name and namespace in other branches
  1. 9 core/modules/field_ui/src/Form/FieldConfigEditForm.php \Drupal\field_ui\Form\FieldConfigEditForm
  2. 8.9.x core/modules/field_ui/src/Form/FieldConfigEditForm.php \Drupal\field_ui\Form\FieldConfigEditForm
  3. 10 core/modules/field_ui/src/Form/FieldConfigEditForm.php \Drupal\field_ui\Form\FieldConfigEditForm

Provides a form for the field settings form.

@internal

Hierarchy

Expanded class hierarchy of FieldConfigEditForm

2 files declare their use of FieldConfigEditForm
FieldConfigEditFormTest.php in core/modules/field_ui/tests/src/Unit/FieldConfigEditFormTest.php
field_ui.module in core/modules/field_ui/field_ui.module
Allows administrators to attach custom fields to fieldable types.

File

core/modules/field_ui/src/Form/FieldConfigEditForm.php, line 30

Namespace

Drupal\field_ui\Form
View source
class FieldConfigEditForm extends EntityForm {
    use FieldStorageCreationTrait;
    
    /**
     * The entity being used by this form.
     *
     * @var \Drupal\field\FieldConfigInterface
     */
    protected $entity;
    
    /**
     * The name of the entity type.
     *
     * @var string
     */
    protected string $entityTypeId;
    
    /**
     * The entity bundle.
     *
     * @var string
     */
    protected string $bundle;
    public function __construct(EntityTypeBundleInfoInterface $entityTypeBundleInfo, TypedDataManagerInterface $typedDataManager, EntityDisplayRepositoryInterface $entityDisplayRepository, PrivateTempStore $tempStore, ElementInfoManagerInterface $elementInfo) {
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('entity_type.bundle.info'), $container->get('typed_data_manager'), $container->get('entity_display.repository'), $container->get('tempstore.private')
            ->get('field_ui'), $container->get('plugin.manager.element_info'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        // Ensure that the form ID remains consistent between both 'default' and
        // 'edit' operations. This is needed because historically it was only
        // possible to edit the field configuration.
        return 'field_config_edit_form';
    }
    
    /**
     * {@inheritdoc}
     */
    public function form(array $form, FormStateInterface $form_state) {
        $form = parent::form($form, $form_state);
        $form['#entity_builders'][] = 'field_form_field_config_edit_form_entity_builder';
        $field_storage = $this->entity
            ->getFieldStorageDefinition();
        $bundles = $this->entityTypeBundleInfo
            ->getBundleInfo($this->entity
            ->getTargetEntityTypeId());
        $form_title = $this->t('%field settings for %bundle', [
            '%field' => $this->entity
                ->getLabel(),
            '%bundle' => $bundles[$this->entity
                ->getTargetBundle()]['label'],
        ]);
        $form['#title'] = $form_title;
        if ($field_storage->isLocked()) {
            $form['locked'] = [
                '#markup' => $this->t('The field %field is locked and cannot be edited.', [
                    '%field' => $this->entity
                        ->getLabel(),
                ]),
            ];
            return $form;
        }
        // Build the configurable field values.
        $form['label'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Label'),
            '#default_value' => $this->entity
                ->getLabel() ?: $field_storage->getName(),
            '#required' => TRUE,
            '#maxlength' => 255,
            '#weight' => -20,
        ];
        $form['description'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Help text'),
            '#default_value' => $this->entity
                ->getDescription(),
            '#rows' => 5,
            '#description' => $this->t('Instructions to present to the user below this field on the editing form.<br />Allowed HTML tags: @tags', [
                '@tags' => FieldFilteredMarkup::displayAllowedTags(),
            ]) . '<br />' . $this->t('This field supports tokens.'),
            '#weight' => -10,
        ];
        $form['required'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Required field'),
            '#default_value' => $this->entity
                ->isRequired(),
            '#weight' => -5,
        ];
        // Create an arbitrary entity object (used by the 'default value' widget).
        $ids = (object) [
            'entity_type' => $this->entity
                ->getTargetEntityTypeId(),
            'bundle' => $this->entity
                ->getTargetBundle(),
            'entity_id' => NULL,
        ];
        $form['field_storage'] = [
            '#type' => 'fieldset',
            '#title' => $this->t('Field Storage'),
            '#weight' => -15,
            '#tree' => TRUE,
        ];
        $form['field_storage']['subform'] = [
            '#parents' => [
                'field_storage',
                'subform',
            ],
        ];
        $form['field_storage']['subform']['field_storage_submit'] = [
            '#type' => 'submit',
            '#name' => 'field_storage_submit',
            '#attributes' => [
                'class' => [
                    'js-hide',
                ],
            ],
            '#value' => $this->t('Update settings'),
            '#process' => [
                '::processFieldStorageSubmit',
            ],
            '#limit_validation_errors' => [
                $form['field_storage']['subform']['#parents'],
            ],
            '#submit' => [
                '::fieldStorageSubmit',
            ],
        ];
        $field_storage_form = $this->entityTypeManager
            ->getFormObject('field_storage_config', $this->operation);
        $field_storage_form->setEntity($field_storage);
        $subform_state = SubformState::createForSubform($form['field_storage']['subform'], $form, $form_state, $field_storage_form);
        $form['field_storage']['subform'] = $field_storage_form->buildForm($form['field_storage']['subform'], $subform_state, $this->entity);
        $form['#entity'] = _field_create_entity_from_ids($ids);
        $items = $this->getTypedData($this->entity, $form['#entity']);
        $item = $items->first() ?: $items->appendItem();
        $this->addAjaxCallbacks($form['field_storage']['subform']);
        if (isset($form['field_storage']['subform']['cardinality_container'])) {
            $form['field_storage']['subform']['cardinality_container']['#parents'] = [
                'field_storage',
                'subform',
            ];
        }
        // Add field settings for the field type and a container for third party
        // settings that modules can add to via hook_form_FORM_ID_alter().
        $form['settings'] = [
            '#tree' => TRUE,
            '#weight' => 10,
        ];
        $form['settings'] += $item->fieldSettingsForm($form, $form_state);
        $form['third_party_settings'] = [
            '#tree' => TRUE,
            '#weight' => 11,
        ];
        // Create a new instance of typed data for the field to ensure that default
        // value widget is always rendered from a clean state.
        $items = $this->getTypedData($this->entity, $form['#entity']);
        // Add handling for default value.
        if ($element = $items->defaultValuesForm($form, $form_state)) {
            $has_required = $this->hasAnyRequired($element);
            $element = array_merge($element, [
                '#type' => 'details',
                '#title' => $this->t('Default value'),
                '#open' => TRUE,
                '#tree' => TRUE,
                '#description' => $this->t('The default value for this field, used when creating new content.'),
                '#weight' => 12,
            ]);
            if (!$has_required) {
                $has_default_value = count($this->entity
                    ->getDefaultValue($form['#entity'])) > 0;
                $element['#states'] = [
                    'invisible' => [
                        ':input[name="set_default_value"]' => [
                            'checked' => FALSE,
                        ],
                    ],
                ];
                $form['set_default_value'] = [
                    '#type' => 'checkbox',
                    '#title' => $this->t('Set default value'),
                    '#default_value' => $has_default_value,
                    '#description' => $this->t('Provide a pre-filled value for the editing form.'),
                    '#weight' => $element['#weight'],
                ];
            }
            $form['default_value'] = $element;
        }
        $form['#prefix'] = '<div id="field-combined">';
        $form['#suffix'] = '</div>';
        $form['#attached']['library'][] = 'field_ui/drupal.field_ui';
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function afterBuild(array $element, FormStateInterface $form_state) {
        // Delegate ::afterBuild to the subform.
        // @todo remove after https://www.drupal.org/i/3385205 has been addressed.
        if (isset($element['field_storage_submit'])) {
            $field_storage_form = $this->entityTypeManager
                ->getFormObject('field_storage_config', $this->operation);
            $field_storage_form->setEntity($this->entity
                ->getFieldStorageDefinition());
            return $field_storage_form->afterBuild($element, SubformState::createForSubform($element, $form_state->getCompleteForm(), $form_state));
        }
        return parent::afterBuild($element, $form_state);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function copyFormValuesToEntity(EntityInterface $entity, array $form, FormStateInterface $form_state) {
        parent::copyFormValuesToEntity($entity, $form, $form_state);
        // Update the current field storage instance based on subform state.
        if (!empty($form['field_storage']['subform'])) {
            $subform_state = SubformState::createForSubform($form['field_storage']['subform'], $form, $form_state);
            $field_storage_form = $this->entityTypeManager
                ->getFormObject('field_storage_config', $this->operation);
            $field_storage_form->setEntity($entity->getFieldStorageDefinition());
            $reflector = new \ReflectionObject($entity);
            // Update the field storage entity based on subform values.
            $property = $reflector->getProperty('fieldStorage');
            $property->setValue($entity, $field_storage_form->buildEntity($form['field_storage']['subform'], $subform_state));
            // Remove the item definition to make sure it's not storing stale data.
            $property = $reflector->getProperty('itemDefinition');
            $property->setValue($entity, NULL);
        }
    }
    
    /**
     * A function to check if element contains any required elements.
     *
     * @param array $element
     *   An element to check.
     *
     * @return bool
     */
    private function hasAnyRequired(array $element) {
        $has_required = FALSE;
        foreach (Element::children($element) as $child) {
            if (isset($element[$child]['#required']) && $element[$child]['#required']) {
                $has_required = TRUE;
                break;
            }
            if (Element::children($element[$child])) {
                return $this->hasAnyRequired($element[$child]);
            }
        }
        return $has_required;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function actions(array $form, FormStateInterface $form_state) {
        $actions = parent::actions($form, $form_state);
        $actions['submit']['#value'] = $this->t('Save settings');
        if (!$this->entity
            ->isNew()) {
            $target_entity_type = $this->entityTypeManager
                ->getDefinition($this->entity
                ->getTargetEntityTypeId());
            $route_parameters = [
                'field_config' => $this->entity
                    ->id(),
            ] + FieldUI::getRouteBundleParameter($target_entity_type, $this->entity
                ->getTargetBundle());
            $url = new Url('entity.field_config.' . $target_entity_type->id() . '_field_delete_form', $route_parameters);
            if ($this->getRequest()->query
                ->has('destination')) {
                $query = $url->getOption('query');
                $query['destination'] = $this->getRequest()->query
                    ->get('destination');
                $url->setOption('query', $query);
            }
            $actions['delete'] = [
                '#type' => 'link',
                '#title' => $this->t('Delete'),
                '#url' => $url,
                '#access' => $this->entity
                    ->access('delete'),
                '#attributes' => [
                    'class' => [
                        'button',
                        'button--danger',
                    ],
                ],
            ];
        }
        return $actions;
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateForm(array &$form, FormStateInterface $form_state) {
        parent::validateForm($form, $form_state);
        $field_storage_form = $this->entityTypeManager
            ->getFormObject('field_storage_config', $this->operation);
        $field_storage_form->setEntity($this->entity
            ->getFieldStorageDefinition());
        $subform_state = SubformState::createForSubform($form['field_storage']['subform'], $form, $form_state, $field_storage_form);
        $field_storage_form->validateForm($form['field_storage']['subform'], $subform_state);
        // Make sure that the default value form is validated using the field
        // configuration that was just submitted.
        $field_config = $this->buildEntity($form, $form_state);
        if (isset($form['default_value']) && (!isset($form['set_default_value']) || $form_state->getValue('set_default_value'))) {
            $items = $this->getTypedData($field_config, $form['#entity']);
            $items->defaultValuesFormValidate($form['default_value'], $form, $form_state);
        }
        // The form is rendered based on the entity property, meaning that it must
        // be updated based on the latest form state even though it might be invalid
        // at this point.
        $this->entity = $this->buildEntity($form, $form_state);
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        parent::submitForm($form, $form_state);
        $field_storage_form = $this->entityTypeManager
            ->getFormObject('field_storage_config', $this->operation);
        $field_storage_form->setEntity($this->entity
            ->getFieldStorageDefinition());
        $subform_state = SubformState::createForSubform($form['field_storage']['subform'], $form, $form_state, $field_storage_form);
        $field_storage_form->submitForm($form['field_storage']['subform'], $subform_state);
        try {
            $field_storage_form->save($form['field_storage']['subform'], $subform_state);
        } catch (EntityStorageException $exception) {
            $this->handleEntityStorageException($form_state, $exception);
            return;
        }
        // Handle the default value.
        $default_value = [];
        if (isset($form['default_value']) && (!isset($form['set_default_value']) || $form_state->getValue('set_default_value'))) {
            $items = $this->getTypedData($this->entity, $form['#entity']);
            $default_value = $items->defaultValuesFormSubmit($form['default_value'], $form, $form_state);
        }
        $this->entity
            ->setDefaultValue($default_value);
    }
    
    /**
     * {@inheritdoc}
     */
    public function save(array $form, FormStateInterface $form_state) {
        // Save field config.
        try {
            try {
                $this->entity
                    ->save();
            } catch (EntityStorageException $exception) {
                $this->handleEntityStorageException($form_state, $exception);
                return;
            }
            if (isset($form_state->getStorage()['default_options'])) {
                $default_options = $form_state->getStorage()['default_options'];
                // Configure the default display modes.
                $this->entityTypeId = $this->entity
                    ->getTargetEntityTypeId();
                $this->bundle = $this->entity
                    ->getTargetBundle();
                $this->configureEntityFormDisplay($this->entity
                    ->getName(), $default_options['entity_form_display'] ?? []);
                $this->configureEntityViewDisplay($this->entity
                    ->getName(), $default_options['entity_view_display'] ?? []);
            }
            if ($this->entity
                ->isNew()) {
                // Delete the temp store entry.
                $this->tempStore
                    ->delete($this->entity
                    ->getTargetEntityTypeId() . ':' . $this->entity
                    ->getName());
            }
            $this->messenger()
                ->addStatus($this->t('Saved %label configuration.', [
                '%label' => $this->entity
                    ->getLabel(),
            ]));
            $request = $this->getRequest();
            if (($destinations = $request->query
                ->all('destinations')) && ($next_destination = FieldUI::getNextDestination($destinations))) {
                $request->query
                    ->remove('destinations');
                $form_state->setRedirectUrl($next_destination);
            }
            else {
                $form_state->setRedirectUrl(FieldUI::getOverviewRouteInfo($this->entity
                    ->getTargetEntityTypeId(), $this->entity
                    ->getTargetBundle()));
            }
        } catch (\Exception $e) {
            $this->messenger()
                ->addError($this->t('Attempt to update field %label failed: %message.', [
                '%label' => $this->entity
                    ->getLabel(),
                '%message' => $e->getMessage(),
            ]));
        }
    }
    
    /**
     * The _title_callback for the field settings form.
     *
     * @param \Drupal\field\FieldConfigInterface $field_config
     *   The field.
     *
     * @return string
     *   The label of the field.
     */
    public function getTitle(FieldConfigInterface $field_config) {
        return $field_config->label();
    }
    
    /**
     * Gets typed data object for the field.
     *
     * @param \Drupal\field\FieldConfigInterface $field_config
     *   The field configuration.
     * @param \Drupal\Core\Entity\FieldableEntityInterface $parent
     *   The parent entity that the field is attached to.
     *
     * @return \Drupal\Core\TypedData\TypedDataInterface
     */
    private function getTypedData(FieldConfigInterface $field_config, FieldableEntityInterface $parent) : TypedDataInterface {
        // Make sure that typed data manager is re-generating the instance. This
        // important because we want the returned instance to match the current
        // state, which could be different from what has been stored in config.
        $this->typedDataManager
            ->clearCachedDefinitions();
        $entity_adapter = EntityAdapter::createFromEntity($parent);
        return $this->typedDataManager
            ->create($field_config, $field_config->getDefaultValue($parent), $field_config->getName(), $entity_adapter);
    }
    
    /**
     * Process handler for subform submit.
     */
    public static function processFieldStorageSubmit(array $element, FormStateInterface $form_state, &$complete_form) {
        // Limit validation errors to the field storage form while the field storage
        // form is being edited.
        $complete_form['#limit_validation_errors'] = [
            array_slice($element['#parents'], 0, -1),
        ];
        return $element;
    }
    
    /**
     * Submit handler for subform submit.
     *
     * @param array $form
     *   An associative array containing the structure of the form.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   The current state of the form.
     */
    public function fieldStorageSubmit(&$form, FormStateInterface $form_state) {
        // The default value widget needs to be regenerated.
        $form_storage =& $form_state->getStorage();
        unset($form_storage['default_value_widget']);
        $form_state->setRebuild();
    }
    
    /**
     * Add Ajax callback for all inputs.
     *
     * @param array $form
     *   An associative array containing the structure of the form.
     */
    private function addAjaxCallbacks(array &$form) : void {
        if (isset($form['#type']) && !isset($form['#ajax'])) {
            if ($this->elementInfo
                ->getInfoProperty($form['#type'], '#input') && !$this->elementInfo
                ->getInfoProperty($form['#type'], '#is_button')) {
                $form['#ajax'] = [
                    'trigger_as' => [
                        'name' => 'field_storage_submit',
                    ],
                    'wrapper' => 'field-combined',
                    'event' => 'change',
                ];
            }
        }
        foreach (Element::children($form) as $child_key) {
            $this->addAjaxCallbacks($form[$child_key]);
        }
    }
    
    /**
     * Handles entity storage exceptions and redirects the form.
     *
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   The form state.
     * @param \Drupal\Core\Entity\EntityStorageException $exception
     *   The exception.
     */
    protected function handleEntityStorageException(FormStateInterface $form_state, EntityStorageException $exception) : void {
        $this->tempStore
            ->delete($this->entity
            ->getTargetEntityTypeId() . ':' . $this->entity
            ->getName());
        $form_state->setRedirectUrl(FieldUI::getOverviewRouteInfo($this->entity
            ->getTargetEntityTypeId(), $this->entity
            ->getTargetBundle()));
        $this->messenger()
            ->addError($this->t('An error occurred while saving the field: @error', [
            '@error' => $exception->getMessage(),
        ]));
    }

}

Members

Title Sort descending Modifiers Object type Summary Overriden Title Overrides
DependencySerializationTrait::$_entityStorages protected property
DependencySerializationTrait::$_serviceIds protected property
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
EntityForm::$entityTypeManager protected property The entity type manager. 3
EntityForm::$moduleHandler protected property The module handler service. 2
EntityForm::$operation protected property The name of the current operation.
EntityForm::actionsElement protected function Returns the action form element for the current entity form.
EntityForm::buildEntity public function Builds an updated entity object based upon the submitted form values. Overrides EntityFormInterface::buildEntity 5
EntityForm::buildForm public function Form constructor. Overrides FormInterface::buildForm 13
EntityForm::getBaseFormId public function Returns a string identifying the base form. Overrides BaseFormIdInterface::getBaseFormId 4
EntityForm::getEntity public function Gets the form entity. Overrides EntityFormInterface::getEntity
EntityForm::getEntityFromRouteMatch public function Determines which entity will be used by this form from a RouteMatch object. Overrides EntityFormInterface::getEntityFromRouteMatch 3
EntityForm::getOperation public function Gets the operation identifying the form. Overrides EntityFormInterface::getOperation
EntityForm::init protected function Initialize the form state and the entity before the first form build. 3
EntityForm::prepareEntity protected function Prepares the entity object before the form is built first. 3
EntityForm::prepareInvokeAll protected function Invokes the specified prepare hook variant.
EntityForm::processForm public function Process callback: assigns weights and hides extra fields.
EntityForm::setEntity public function Sets the form entity. Overrides EntityFormInterface::setEntity
EntityForm::setEntityTypeManager public function Sets the entity type manager for this form. Overrides EntityFormInterface::setEntityTypeManager
EntityForm::setModuleHandler public function Sets the module handler for this form. Overrides EntityFormInterface::setModuleHandler
EntityForm::setOperation public function Sets the operation for this form. Overrides EntityFormInterface::setOperation
FieldConfigEditForm::$bundle protected property The entity bundle.
FieldConfigEditForm::$entity protected property The entity being used by this form. Overrides EntityForm::$entity
FieldConfigEditForm::$entityTypeId protected property The name of the entity type.
FieldConfigEditForm::actions protected function Returns an array of supported actions for the current entity form. Overrides EntityForm::actions
FieldConfigEditForm::addAjaxCallbacks private function Add Ajax callback for all inputs.
FieldConfigEditForm::afterBuild public function Form element #after_build callback: Updates the entity with submitted data. Overrides EntityForm::afterBuild
FieldConfigEditForm::copyFormValuesToEntity protected function Copies top-level form values to entity properties. Overrides EntityForm::copyFormValuesToEntity
FieldConfigEditForm::create public static function Instantiates a new instance of this class. Overrides FormBase::create
FieldConfigEditForm::fieldStorageSubmit public function Submit handler for subform submit.
FieldConfigEditForm::form public function Gets the actual form array to be built. Overrides EntityForm::form
FieldConfigEditForm::getFormId public function Returns a unique string identifying the form. Overrides EntityForm::getFormId
FieldConfigEditForm::getTitle public function The _title_callback for the field settings form.
FieldConfigEditForm::getTypedData private function Gets typed data object for the field.
FieldConfigEditForm::handleEntityStorageException protected function Handles entity storage exceptions and redirects the form.
FieldConfigEditForm::hasAnyRequired private function A function to check if element contains any required elements.
FieldConfigEditForm::processFieldStorageSubmit public static function Process handler for subform submit.
FieldConfigEditForm::save public function Form submission handler for the &#039;save&#039; action. Overrides EntityForm::save
FieldConfigEditForm::submitForm public function This is the default entity object builder function. It is called before any
other submit handler to build the new entity object to be used by the
following submit handlers. At this point of the form workflow the entity is
validated and the form stateā€¦
Overrides EntityForm::submitForm
FieldConfigEditForm::validateForm public function Form validation handler. Overrides FormBase::validateForm
FieldConfigEditForm::__construct public function
FieldStorageCreationTrait::configureEntityFormDisplay protected function Configures the field for the default form mode.
FieldStorageCreationTrait::configureEntityViewDisplay protected function Configures the field for the default view mode.
FormBase::$configFactory protected property The config factory. 2
FormBase::$requestStack protected property The request stack. 1
FormBase::$routeMatch protected property The route match.
FormBase::config protected function Retrieves a configuration object.
FormBase::configFactory protected function Gets the config factory for this form. 2
FormBase::container private function Returns the service container.
FormBase::currentUser protected function Gets the current user. 2
FormBase::getRequest protected function Gets the request object.
FormBase::getRouteMatch protected function Gets the route match.
FormBase::logger protected function Gets the logger for a specific channel.
FormBase::redirect protected function Returns a redirect response object for the specified route.
FormBase::resetConfigFactory public function Resets the configuration factory.
FormBase::setConfigFactory public function Sets the config factory for this form.
FormBase::setRequestStack public function Sets the request stack object to use.
LoggerChannelTrait::$loggerFactory protected property The logger channel factory service.
LoggerChannelTrait::getLogger protected function Gets the logger for a specific channel.
LoggerChannelTrait::setLoggerFactory public function Injects the logger channel factory.
MessengerTrait::$messenger protected property The messenger. 16
MessengerTrait::messenger public function Gets the messenger. 16
MessengerTrait::setMessenger public function Sets the messenger.
RedirectDestinationTrait::$redirectDestination protected property The redirect destination service. 2
RedirectDestinationTrait::getDestinationArray protected function Prepares a &#039;destination&#039; URL query parameter for use with \Drupal\Core\Url.
RedirectDestinationTrait::getRedirectDestination protected function Returns the redirect destination service.
RedirectDestinationTrait::setRedirectDestination public function Sets the redirect destination service.
StringTranslationTrait::$stringTranslation protected property The string translation service. 3
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.

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