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class Container in Drupal 9

Same name in this branch
  1. 9 core/lib/Drupal/Core/DependencyInjection/Container.php \Drupal\Core\DependencyInjection\Container
  2. 9 core/lib/Drupal/Component/DependencyInjection/Container.php \Drupal\Component\DependencyInjection\Container
  3. 9 core/lib/Drupal/Core/Render/Element/Container.php \Drupal\Core\Render\Element\Container
Same name and namespace in other branches
  1. 8 core/lib/Drupal/Core/Render/Element/Container.php \Drupal\Core\Render\Element\Container

Provides a render element that wraps child elements in a container.

Surrounds child elements with a <div> and adds attributes such as classes or an HTML ID.

Properties:

  • #optional: Indicates whether the container should render when it has no visible children. Defaults to FALSE.

Usage example:

$form['needs_accommodation'] = [
  '#type' => 'checkbox',
  '#title' => $this
    ->t('Need Special Accommodations?'),
];
$form['accommodation'] = [
  '#type' => 'container',
  '#attributes' => [
    'class' => [
      'accommodation',
    ],
  ],
  '#states' => [
    'invisible' => [
      'input[name="needs_accommodation"]' => [
        'checked' => FALSE,
      ],
    ],
  ],
];
$form['accommodation']['diet'] = [
  '#type' => 'textfield',
  '#title' => $this
    ->t('Dietary Restrictions'),
];

Plugin annotation

@RenderElement("container");

Hierarchy

Expanded class hierarchy of Container

3 string references to 'Container'
ClaroVerticalTabsTest::testVerticalTabs in core/tests/Drupal/KernelTests/Core/Theme/ClaroVerticalTabsTest.php
Confirms that Claro can render vertical tabs correctly.
field.field.taxonomy_term.forums.forum_container.yml in core/modules/forum/config/optional/field.field.taxonomy_term.forums.forum_container.yml
core/modules/forum/config/optional/field.field.taxonomy_term.forums.forum_container.yml
SearchExcerptTest::testSearchExcerptSimplified in core/modules/search/tests/src/Kernel/SearchExcerptTest.php
Tests search_excerpt() with search keywords matching simplified words.
91 #type uses of Container
AccountForm::form in core/modules/user/src/AccountForm.php
Gets the actual form array to be built.
AccountSettingsForm::buildForm in core/modules/user/src/AccountSettingsForm.php
Form constructor.
ActionAjaxTest::buildConfigurationForm in core/modules/action/tests/action_form_ajax_test/src/Plugin/Action/ActionAjaxTest.php
Form constructor.
AddFormBase::buildEntityFormElement in core/modules/media_library/src/Form/AddFormBase.php
Builds the sub-form for setting required fields on a new media item.
AddFormBase::buildSelectedItemElement in core/modules/media_library/src/Form/AddFormBase.php
Returns a render array for a single pre-selected media item.

... See full list

File

core/lib/Drupal/Core/Render/Element/Container.php, line 46

Namespace

Drupal\Core\Render\Element
View source
class Container extends RenderElement {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $class = static::class;
    return [
      '#optional' => FALSE,
      '#process' => [
        [
          $class,
          'processGroup',
        ],
        [
          $class,
          'processContainer',
        ],
      ],
      '#pre_render' => [
        [
          $class,
          'preRenderGroup',
        ],
        [
          $class,
          'preRenderContainer',
        ],
      ],
      '#theme_wrappers' => [
        'container',
      ],
    ];
  }

  /**
   * Processes a container element.
   *
   * @param array $element
   *   An associative array containing the properties and children of the
   *   container.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   * @param array $complete_form
   *   The complete form structure.
   *
   * @return array
   *   The processed element.
   */
  public static function processContainer(&$element, FormStateInterface $form_state, &$complete_form) {

    // Generate the ID of the element if it's not explicitly given.
    if (!isset($element['#id'])) {
      $element['#id'] = HtmlUtility::getUniqueId(implode('-', $element['#parents']) . '-wrapper');
    }
    return $element;
  }

  /**
   * Prevents optional containers from rendering if they have no children.
   *
   * @param array $element
   *   An associative array containing the properties and children of the
   *   container.
   *
   * @return array
   *   The modified element.
   */
  public static function preRenderContainer($element) {

    // Do not render optional container elements if there are no children.
    if (empty($element['#printed']) && !empty($element['#optional']) && !Element::getVisibleChildren($element)) {
      $element['#printed'] = TRUE;
    }
    return $element;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
Container::getInfo public function Returns the element properties for this element. Overrides ElementInterface::getInfo 1
Container::preRenderContainer public static function Prevents optional containers from rendering if they have no children.
Container::processContainer public static function Processes a container element.
DependencySerializationTrait::$_entityStorages protected property
DependencySerializationTrait::$_serviceIds protected property
DependencySerializationTrait::__sleep public function 2
DependencySerializationTrait::__wakeup public function 2
MessengerTrait::$messenger protected property The messenger. 27
MessengerTrait::messenger public function Gets the messenger. 27
MessengerTrait::setMessenger public function Sets the messenger.
PluginBase::$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 2
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.
PluginBase::__construct public function Constructs a \Drupal\Component\Plugin\PluginBase object. 98
RenderElement::preRenderAjaxForm public static function Adds Ajax information about an element to communicate with JavaScript.
RenderElement::preRenderGroup public static function Adds members of this group as actual elements for rendering.
RenderElement::processAjaxForm public static function Form element processing handler for the #ajax form property. 1
RenderElement::processGroup public static function Arranges elements into groups.
RenderElement::setAttributes public static function Sets a form element's class attribute. Overrides ElementInterface::setAttributes
StringTranslationTrait::$stringTranslation protected property The string translation service. 4
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.