1	<?php
2
3	declare(strict_types=1);
4
5	namespace Drupal\display_builder_page_layout\EventSubscriber;
6
7	use Drupal\Core\Entity\EntityTypeManagerInterface;
8	use Drupal\Core\Plugin\CachedDiscoveryClearerInterface;
9	use Drupal\display_builder\Event\DisplayBuilderEvent;
10	use Drupal\display_builder\Event\DisplayBuilderEvents;
11	use Drupal\display_builder_page_layout\Entity\PageLayout;
12	use Symfony\Component\EventDispatcher\EventSubscriberInterface;
13
14	/**
15	* The event subscriber for display builder islands.
16	*/
17	class DisplayBuilderSubscriber implements EventSubscriberInterface {
18
19	public function __construct(
20	private CachedDiscoveryClearerInterface $pluginCacheClearer,
21	private EntityTypeManagerInterface $entityTypeManager,
22	) {}
23
24	/**
25	* {@inheritdoc}
26	*/
27	public static function getSubscribedEvents(): array {
28	return [
29	DisplayBuilderEvents::ON_SAVE => 'onSave',
30	];
31	}
32
33	/**
34	* Event handler for when a display builder is saved.
35	*
36	* @param \Drupal\display_builder\Event\DisplayBuilderEvent $event
37	*   The event object.
38	*/
39	public function onSave(DisplayBuilderEvent $event): void {
40	$builder_id = $event->getBuilderId();
41	$contexts = $event->getData();
42	$params = PageLayout::checkInstanceId($builder_id);
43
44	if (!$params) {
45	return;
46	}
47
48	// Context requirements is set to allow SourcePlugin when editing. We need
49	// a precedence when saving.
50	// @todo perhaps we need a third context.
51	/** @var \Drupal\display_builder\InstanceInterface $instance */
52	$instance = $this->entityTypeManager->getStorage('display_builder_instance')->load($builder_id);
53
54	if (!$instance->hasSaveContextsRequirement(PageLayout::getContextRequirement(), $contexts)) {
55	return;
56	}
57	$page_layout_id = $params['page_layout'] ?? NULL;
58
59	if (!$page_layout_id) {
60	// This must never happen because PageLayout::checkInstanceId() always
61	// return a page_layout key.
62	return;
63	}
64	/** @var \Drupal\display_builder_page_layout\PageLayoutInterface $page_layout */
65	$page_layout = $this->entityTypeManager->getStorage('page_layout')->load($page_layout_id);
66	$page_layout->saveSources();
67	// Clearing plugin cache seems enough to get the new layout.
68	// @todo It looks very costly. Check if it is still needed.
69	$this->pluginCacheClearer->clearCachedDefinitions();
70	}
71
72	}

---

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DisplayBuilderSubscriber->__construct

19	public function __construct(
20	private CachedDiscoveryClearerInterface $pluginCacheClearer,
21	private EntityTypeManagerInterface $entityTypeManager,
22	) {}

DisplayBuilderSubscriber->getSubscribedEvents

29	DisplayBuilderEvents::ON_SAVE => 'onSave',

DisplayBuilderSubscriber->onSave

39	public function onSave(DisplayBuilderEvent $event): void {
40	$builder_id = $event->getBuilderId();
41	$contexts = $event->getData();
42	$params = PageLayout::checkInstanceId($builder_id);
43
44	if (!$params) {

45

return;

52	$instance = $this->entityTypeManager->getStorage('display_builder_instance')->load($builder_id);
53
54	if (!$instance->hasSaveContextsRequirement(PageLayout::getContextRequirement(), $contexts)) {

55

return;

57	$page_layout_id = $params['page_layout'] ?? NULL;
58
59	if (!$page_layout_id) {

62

return;

65	$page_layout = $this->entityTypeManager->getStorage('page_layout')->load($page_layout_id);
66	$page_layout->saveSources();
67	// Clearing plugin cache seems enough to get the new layout.
68	// @todo It looks very costly. Check if it is still needed.
69	$this->pluginCacheClearer->clearCachedDefinitions();
70	}