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abstract class BlockBase in Zircon Profile 8.0

Same name and namespace in other branches
  1. 8 core/lib/Drupal/Core/Block/BlockBase.php \Drupal\Core\Block\BlockBase

Defines a base block implementation that most blocks plugins will extend.

This abstract class provides the generic block configuration form, default block settings, and handling for general user-defined block visibility settings.

Hierarchy

Expanded class hierarchy of BlockBase

Related topics

Block API
Information about the classes and interfaces that make up the Block API.
32 files declare their use of BlockBase
AggregatorFeedBlock.php in core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php
Contains \Drupal\aggregator\Plugin\Block\AggregatorFeedBlock.
AjaxFormBlock.php in core/modules/system/tests/modules/ajax_forms_test/src/Plugin/Block/AjaxFormBlock.php
Contains \Drupal\ajax_forms_test\Plugin\Block\AjaxFormBlock.
AttachedRenderingBlock.php in core/modules/system/tests/modules/render_attached_test/src/Plugin/Block/AttachedRenderingBlock.php
Contains \Drupal\render_attached_test\Plugin\Block\AttachedRenderingBlock.
BlockContentBlock.php in core/modules/block_content/src/Plugin/Block/BlockContentBlock.php
Contains \Drupal\block_content\Plugin\Block\BlockContentBlock.
BookNavigationBlock.php in core/modules/book/src/Plugin/Block/BookNavigationBlock.php
Contains \Drupal\book\Plugin\Block\BookNavigationBlock.

... See full list

File

core/lib/Drupal/Core/Block/BlockBase.php, line 30
Contains \Drupal\Core\Block\BlockBase.

Namespace

Drupal\Core\Block
View source 
abstract class BlockBase extends ContextAwarePluginBase implements BlockPluginInterface {
  use ContextAwarePluginAssignmentTrait;

  /**
   * The transliteration service.
   *
   * @var \Drupal\Component\Transliteration\TransliterationInterface
   */
  protected $transliteration;

  /**
   * {@inheritdoc}
   */
  public function label() {
    if (!empty($this->configuration['label'])) {
      return $this->configuration['label'];
    }
    $definition = $this
      ->getPluginDefinition();

    // Cast the admin label to a string since it is an object.
    // @see \Drupal\Core\StringTranslation\TranslatableMarkup
    return (string) $definition['admin_label'];
  }

  /**
   * {@inheritdoc}
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this
      ->setConfiguration($configuration);
  }

  /**
   * {@inheritdoc}
   */
  public function getConfiguration() {
    return $this->configuration;
  }

  /**
   * {@inheritdoc}
   */
  public function setConfiguration(array $configuration) {
    $this->configuration = NestedArray::mergeDeep($this
      ->baseConfigurationDefaults(), $this
      ->defaultConfiguration(), $configuration);
  }

  /**
   * Returns generic default configuration for block plugins.
   *
   * @return array
   *   An associative array with the default configuration.
   */
  protected function baseConfigurationDefaults() {
    return array(
      'id' => $this
        ->getPluginId(),
      'label' => '',
      'provider' => $this->pluginDefinition['provider'],
      'label_display' => BlockInterface::BLOCK_LABEL_VISIBLE,
    );
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {
    return array();
  }

  /**
   * {@inheritdoc}
   */
  public function setConfigurationValue($key, $value) {
    $this->configuration[$key] = $value;
  }

  /**
   * {@inheritdoc}
   */
  public function calculateDependencies() {
    return array();
  }

  /**
   * {@inheritdoc}
   */
  public function access(AccountInterface $account, $return_as_object = FALSE) {
    $access = $this
      ->blockAccess($account);
    return $return_as_object ? $access : $access
      ->isAllowed();
  }

  /**
   * Indicates whether the block should be shown.
   *
   * Blocks with specific access checking should override this method rather
   * than access(), in order to avoid repeating the handling of the
   * $return_as_object argument.
   *
   * @param \Drupal\Core\Session\AccountInterface $account
   *   The user session for which to check access.
   *
   * @return \Drupal\Core\Access\AccessResult
   *   The access result.
   *
   * @see self::access()
   */
  protected function blockAccess(AccountInterface $account) {

    // By default, the block is visible.
    return AccessResult::allowed();
  }

  /**
   * {@inheritdoc}
   *
   * Creates a generic configuration form for all block types. Individual
   * block plugins can add elements to this form by overriding
   * BlockBase::blockForm(). Most block plugins should not override this
   * method unless they need to alter the generic form elements.
   *
   * @see \Drupal\Core\Block\BlockBase::blockForm()
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
    $definition = $this
      ->getPluginDefinition();
    $form['provider'] = array(
      '#type' => 'value',
      '#value' => $definition['provider'],
    );
    $form['admin_label'] = array(
      '#type' => 'item',
      '#title' => $this
        ->t('Block description'),
      '#plain_text' => $definition['admin_label'],
    );
    $form['label'] = array(
      '#type' => 'textfield',
      '#title' => $this
        ->t('Title'),
      '#maxlength' => 255,
      '#default_value' => $this
        ->label(),
      '#required' => TRUE,
    );
    $form['label_display'] = array(
      '#type' => 'checkbox',
      '#title' => $this
        ->t('Display title'),
      '#default_value' => $this->configuration['label_display'] === BlockInterface::BLOCK_LABEL_VISIBLE,
      '#return_value' => BlockInterface::BLOCK_LABEL_VISIBLE,
    );

    // Add context mapping UI form elements.
    $contexts = $form_state
      ->getTemporaryValue('gathered_contexts') ?: [];
    $form['context_mapping'] = $this
      ->addContextAssignmentElement($this, $contexts);

    // Add plugin-specific settings for this block type.
    $form += $this
      ->blockForm($form, $form_state);
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function blockForm($form, FormStateInterface $form_state) {
    return array();
  }

  /**
   * {@inheritdoc}
   *
   * Most block plugins should not override this method. To add validation
   * for a specific block type, override BlockBase::blockValidate().
   *
   * @see \Drupal\Core\Block\BlockBase::blockValidate()
   */
  public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {

    // Remove the admin_label form item element value so it will not persist.
    $form_state
      ->unsetValue('admin_label');
    $this
      ->blockValidate($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function blockValidate($form, FormStateInterface $form_state) {
  }

  /**
   * {@inheritdoc}
   *
   * Most block plugins should not override this method. To add submission
   * handling for a specific block type, override BlockBase::blockSubmit().
   *
   * @see \Drupal\Core\Block\BlockBase::blockSubmit()
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {

    // Process the block's submission handling if no errors occurred only.
    if (!$form_state
      ->getErrors()) {
      $this->configuration['label'] = $form_state
        ->getValue('label');
      $this->configuration['label_display'] = $form_state
        ->getValue('label_display');
      $this->configuration['provider'] = $form_state
        ->getValue('provider');
      $this
        ->blockSubmit($form, $form_state);
    }
  }

  /**
   * {@inheritdoc}
   */
  public function blockSubmit($form, FormStateInterface $form_state) {
  }

  /**
   * {@inheritdoc}
   */
  public function getMachineNameSuggestion() {
    $definition = $this
      ->getPluginDefinition();
    $admin_label = $definition['admin_label'];

    // @todo This is basically the same as what is done in
    //   \Drupal\system\MachineNameController::transliterate(), so it might make
    //   sense to provide a common service for the two.
    $transliterated = $this
      ->transliteration()
      ->transliterate($admin_label, LanguageInterface::LANGCODE_DEFAULT, '_');
    $transliterated = Unicode::strtolower($transliterated);
    $transliterated = preg_replace('@[^a-z0-9_.]+@', '', $transliterated);
    return $transliterated;
  }

  /**
   * Wraps the transliteration service.
   *
   * @return \Drupal\Component\Transliteration\TransliterationInterface
   */
  protected function transliteration() {
    if (!$this->transliteration) {
      $this->transliteration = \Drupal::transliteration();
    }
    return $this->transliteration;
  }

  /**
   * Sets the transliteration service.
   *
   * @param \Drupal\Component\Transliteration\TransliterationInterface $transliteration
   *   The transliteration service.
   */
  public function setTransliteration(TransliterationInterface $transliteration) {
    $this->transliteration = $transliteration;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
BlockBase::$transliteration protected property The transliteration service.
BlockBase::access public function Indicates whether the block should be shown. Overrides BlockPluginInterface::access
BlockBase::baseConfigurationDefaults protected function Returns generic default configuration for block plugins.
BlockBase::blockAccess protected function Indicates whether the block should be shown. 12
BlockBase::blockForm public function Returns the configuration form elements specific to this block plugin. Overrides BlockPluginInterface::blockForm 11
BlockBase::blockSubmit public function Adds block type-specific submission handling for the block form. Overrides BlockPluginInterface::blockSubmit 10
BlockBase::blockValidate public function Adds block type-specific validation for the block form. Overrides BlockPluginInterface::blockValidate 1
BlockBase::buildConfigurationForm public function Creates a generic configuration form for all block types. Individual block plugins can add elements to this form by overriding BlockBase::blockForm(). Most block plugins should not override this method unless they need to alter the generic form elements. Overrides PluginFormInterface::buildConfigurationForm 1
BlockBase::calculateDependencies public function Calculates dependencies for the configured plugin. Overrides DependentPluginInterface::calculateDependencies
BlockBase::defaultConfiguration public function Gets default configuration for this plugin. Overrides ConfigurablePluginInterface::defaultConfiguration 14
BlockBase::getConfiguration public function Gets this plugin's configuration. Overrides ConfigurablePluginInterface::getConfiguration 1
BlockBase::getMachineNameSuggestion public function Suggests a machine name to identify an instance of this block. Overrides BlockPluginInterface::getMachineNameSuggestion 1
BlockBase::label public function Returns the user-facing block label. Overrides BlockPluginInterface::label
BlockBase::setConfiguration public function Sets the configuration for this plugin instance. Overrides ConfigurablePluginInterface::setConfiguration
BlockBase::setConfigurationValue public function Sets a particular value in the block settings. Overrides BlockPluginInterface::setConfigurationValue
BlockBase::setTransliteration public function Sets the transliteration service.
BlockBase::submitConfigurationForm public function Most block plugins should not override this method. To add submission handling for a specific block type, override BlockBase::blockSubmit(). Overrides PluginFormInterface::submitConfigurationForm
BlockBase::transliteration protected function Wraps the transliteration service.
BlockBase::validateConfigurationForm public function Most block plugins should not override this method. To add validation for a specific block type, override BlockBase::blockValidate(). Overrides PluginFormInterface::validateConfigurationForm
BlockBase::__construct public function Overrides \Drupal\Component\Plugin\PluginBase::__construct(). Overrides ContextAwarePluginBase::__construct 15
BlockPluginInterface::build public function Builds and returns the renderable array for this block plugin. 33
ContextAwarePluginAssignmentTrait::addContextAssignmentElement protected function Builds a form element for assigning a context to a given slot.
ContextAwarePluginAssignmentTrait::contextHandler protected function Wraps the context handler.
ContextAwarePluginAssignmentTrait::t abstract protected function Ensures the t() method is available.
ContextAwarePluginBase::$context protected property The data objects representing the context of this plugin.
ContextAwarePluginBase::createContextFromConfiguration protected function Overrides ContextAwarePluginBase::createContextFromConfiguration
ContextAwarePluginBase::getCacheContexts public function 9
ContextAwarePluginBase::getCacheMaxAge public function 7
ContextAwarePluginBase::getCacheTags public function 4
ContextAwarePluginBase::getContext public function Overrides ContextAwarePluginBase::getContext
ContextAwarePluginBase::getContextDefinition public function Overrides ContextAwarePluginBase::getContextDefinition
ContextAwarePluginBase::getContextDefinitions public function Overrides ContextAwarePluginBase::getContextDefinitions
ContextAwarePluginBase::getContextMapping public function Gets a mapping of the expected assignment names to their context names. Overrides ContextAwarePluginInterface::getContextMapping
ContextAwarePluginBase::getContexts public function Gets the defined contexts. Overrides ContextAwarePluginInterface::getContexts
ContextAwarePluginBase::getContextValue public function Gets the value for a defined context. Overrides ContextAwarePluginInterface::getContextValue
ContextAwarePluginBase::getContextValues public function Gets the values for all defined contexts. Overrides ContextAwarePluginInterface::getContextValues
ContextAwarePluginBase::setContext public function Set a context on this plugin. Overrides ContextAwarePluginBase::setContext
ContextAwarePluginBase::setContextMapping public function Sets a mapping of the expected assignment names to their context names. Overrides ContextAwarePluginInterface::setContextMapping
ContextAwarePluginBase::setContextValue public function Sets the value for a defined context. Overrides ContextAwarePluginBase::setContextValue
ContextAwarePluginBase::validateContexts public function Validates the set values for the defined contexts. Overrides ContextAwarePluginInterface::validateContexts
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
PluginBase::$configuration protected property Configuration information passed into the plugin. 2
PluginBase::$pluginDefinition protected property The plugin implementation definition.
PluginBase::$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
PluginBase::getPluginId public function Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
StringTranslationTrait::$stringTranslation protected property The string translation service.
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
TypedDataTrait::$typedDataManager protected property The typed data manager used for creating the data types.
TypedDataTrait::getTypedDataManager public function Gets the typed data manager. 1
TypedDataTrait::setTypedDataManager public function Sets the typed data manager. 1