Mercurial > hg > isophonics-drupal-site
view core/modules/layout_builder/src/EventSubscriber/BlockComponentRenderArray.php @ 17:129ea1e6d783
Update, including to Drupal core 8.6.10
author | Chris Cannam |
---|---|
date | Thu, 28 Feb 2019 13:21:36 +0000 |
parents | 1fec387a4317 |
children | af1871eacc83 |
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<?php namespace Drupal\layout_builder\EventSubscriber; use Drupal\block_content\Access\RefinableDependentAccessInterface; use Drupal\Core\Access\AccessResult; use Drupal\Core\Block\BlockPluginInterface; use Drupal\Core\Render\Element; use Drupal\Core\Render\PreviewFallbackInterface; use Drupal\Core\Session\AccountInterface; use Drupal\layout_builder\Access\LayoutPreviewAccessAllowed; use Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent; use Drupal\layout_builder\LayoutBuilderEvents; use Symfony\Component\EventDispatcher\EventSubscriberInterface; /** * Builds render arrays and handles access for all block components. * * @internal * Layout Builder is currently experimental and should only be leveraged by * experimental modules and development releases of contributed modules. * See https://www.drupal.org/core/experimental for more information. */ class BlockComponentRenderArray implements EventSubscriberInterface { /** * The current user. * * @var \Drupal\Core\Session\AccountInterface */ protected $currentUser; /** * Creates a BlockComponentRenderArray object. * * @param \Drupal\Core\Session\AccountInterface $current_user * The current user. */ public function __construct(AccountInterface $current_user) { $this->currentUser = $current_user; } /** * {@inheritdoc} */ public static function getSubscribedEvents() { $events[LayoutBuilderEvents::SECTION_COMPONENT_BUILD_RENDER_ARRAY] = ['onBuildRender', 100]; return $events; } /** * Builds render arrays for block plugins and sets it on the event. * * @param \Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent $event * The section component render event. */ public function onBuildRender(SectionComponentBuildRenderArrayEvent $event) { $block = $event->getPlugin(); if (!$block instanceof BlockPluginInterface) { return; } // Set block access dependency even if we are not checking access on // this level. The block itself may render another // RefinableDependentAccessInterface object and need to pass on this value. if ($block instanceof RefinableDependentAccessInterface) { $contexts = $event->getContexts(); if (isset($contexts['layout_builder.entity'])) { if ($entity = $contexts['layout_builder.entity']->getContextValue()) { if ($event->inPreview()) { // If previewing in Layout Builder allow access. $block->setAccessDependency(new LayoutPreviewAccessAllowed()); } else { $block->setAccessDependency($entity); } } } } // Only check access if the component is not being previewed. if ($event->inPreview()) { $access = AccessResult::allowed()->setCacheMaxAge(0); } else { $access = $block->access($this->currentUser, TRUE); } $event->addCacheableDependency($access); if ($access->isAllowed()) { $event->addCacheableDependency($block); $content = $block->build(); $is_content_empty = Element::isEmpty($content); $is_placeholder_ready = $event->inPreview() && $block instanceof PreviewFallbackInterface; // If the content is empty and no placeholder is available, return. if ($is_content_empty && !$is_placeholder_ready) { return; } $build = [ // @todo Move this to BlockBase in https://www.drupal.org/node/2931040. '#theme' => 'block', '#configuration' => $block->getConfiguration(), '#plugin_id' => $block->getPluginId(), '#base_plugin_id' => $block->getBaseId(), '#derivative_plugin_id' => $block->getDerivativeId(), '#weight' => $event->getComponent()->getWeight(), 'content' => $content, ]; if ($is_content_empty && $is_placeholder_ready) { $build['content']['#markup'] = $block->getPreviewFallbackString(); } $event->setBuild($build); } } }