class Container

Same name in this branch
  1. 10 core/lib/Drupal/Core/DependencyInjection/Container.php \Drupal\Core\DependencyInjection\Container
  2. 10 core/lib/Drupal/Component/DependencyInjection/Container.php \Drupal\Component\DependencyInjection\Container
Same name in other branches
  1. 7.x misc/typo3/phar-stream-wrapper/src/Phar/Container.php \TYPO3\PharStreamWrapper\Phar\Container
  2. 9 core/lib/Drupal/Core/Render/Element/Container.php \Drupal\Core\Render\Element\Container
  3. 9 core/lib/Drupal/Core/DependencyInjection/Container.php \Drupal\Core\DependencyInjection\Container
  4. 9 core/lib/Drupal/Component/DependencyInjection/Container.php \Drupal\Component\DependencyInjection\Container
  5. 8.9.x core/lib/Drupal/Core/Render/Element/Container.php \Drupal\Core\Render\Element\Container
  6. 8.9.x core/lib/Drupal/Core/DependencyInjection/Container.php \Drupal\Core\DependencyInjection\Container
  7. 8.9.x core/lib/Drupal/Component/DependencyInjection/Container.php \Drupal\Component\DependencyInjection\Container
  8. 11.x core/lib/Drupal/Core/Render/Element/Container.php \Drupal\Core\Render\Element\Container
  9. 11.x core/lib/Drupal/Core/DependencyInjection/Container.php \Drupal\Core\DependencyInjection\Container
  10. 11.x core/lib/Drupal/Component/DependencyInjection/Container.php \Drupal\Component\DependencyInjection\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'),
];

Hierarchy

Expanded class hierarchy of Container

41 string references to 'Container'
Actions::getInfo in core/lib/Drupal/Core/Render/Element/Actions.php
Returns the element properties for this element.
AddHandler::buildForm in core/modules/views_ui/src/Form/Ajax/AddHandler.php
Form constructor.
ArgumentPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php
Provide a form to edit options for this plugin.
ChooseBlockController::build in core/modules/layout_builder/src/Controller/ChooseBlockController.php
Provides the UI for choosing a new block.
ClaroPreRender::trustedCallbacks in core/themes/claro/src/ClaroPreRender.php
Lists the trusted callbacks provided by the implementing class.

... See full list

File

core/lib/Drupal/Core/Render/Element/Container.php, line 45

Namespace

Drupal\Core\Render\Element
View source 
class Container extends RenderElementBase {
    
    /**
     * {@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

Title Modifiers Object type Summary Overriden Title 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.
PluginInspectionInterface::getPluginDefinition public function Gets the definition of the plugin implementation. 6
PluginInspectionInterface::getPluginId public function Gets the plugin ID of the plugin instance. 2
RenderElementBase::preRenderAjaxForm public static function Adds Ajax information about an element to communicate with JavaScript. 2
RenderElementBase::preRenderGroup public static function Adds members of this group as actual elements for rendering. 2
RenderElementBase::processAjaxForm public static function Form element processing handler for the #ajax form property. 3
RenderElementBase::processGroup public static function Arranges elements into groups. 2
RenderElementBase::setAttributes public static function Sets a form element&#039;s class attribute. Overrides ElementInterface::setAttributes 2

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