class Details in Drupal 8

Same name and namespace in other branches

9 core/lib/Drupal/Core/Render/Element/Details.php \Drupal\Core\Render\Element\Details

Provides a render element for a details element, similar to a fieldset.

Fieldsets can only be used in forms, while details elements can be used outside of forms. Users click on the title to open or close the details element, showing or hiding the contained elements.

Properties:

#title: The title of the details container. Defaults to "Details".
#open: Indicates whether the container should be open by default. Defaults to FALSE.
#summary_attributes: An array of attributes to apply to the <summary> element.

Usage example:

$form['author'] = array(
  '#type' => 'details',
  '#title' => $this
    ->t('Author'),
);
$form['author']['name'] = array(
  '#type' => 'textfield',
  '#title' => $this
    ->t('Name'),
);

Plugin annotation

@RenderElement("details");

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\Core\Render\Element\RenderElement implements ElementInterface
    class \Drupal\Core\Render\Element\Details

Expanded class hierarchy of Details

File

core/lib/Drupal/Core/Render/Element/Details.php, line 39

Namespace

Drupal\Core\Render\Element

View source

class Details extends RenderElement {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $class = get_class($this);
    return [
      '#open' => FALSE,
      '#summary_attributes' => [],
      '#value' => NULL,
      '#process' => [
        [
          $class,
          'processGroup',
        ],
        [
          $class,
          'processAjaxForm',
        ],
      ],
      '#pre_render' => [
        [
          $class,
          'preRenderDetails',
        ],
        [
          $class,
          'preRenderGroup',
        ],
      ],
      '#theme_wrappers' => [
        'details',
      ],
    ];
  }

  /**
   * Adds form element theming to details.
   *
   * @param $element
   *   An associative array containing the properties and children of the
   *   details.
   *
   * @return
   *   The modified element.
   */
  public static function preRenderDetails($element) {
    Element::setAttributes($element, [
      'id',
    ]);

    // The .js-form-wrapper class is required for #states to treat details like
    // containers.
    static::setAttributes($element, [
      'js-form-wrapper',
      'form-wrapper',
    ]);

    // Collapsible details.
    $element['#attached']['library'][] = 'core/drupal.collapse';

    // Open the detail if specified or if a child has an error.
    if (!empty($element['#open']) || !empty($element['#children_errors'])) {
      $element['#attributes']['open'] = 'open';
    }

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

}

Members

Name	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
Details::getInfo	public	function	Returns the element properties for this element. Overrides ElementInterface::getInfo
Details::preRenderDetails	public static	function	Adds form element theming to details.
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.
PluginBase::__construct	public	function	Constructs a \Drupal\Component\Plugin\PluginBase object.	92
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.	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.

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