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\Render\PageDisplayVariantSelectionEvent;
9	use Drupal\Core\Render\RenderEvents;
10	use Symfony\Component\EventDispatcher\EventSubscriberInterface;
11
12	/**
13	* Drupal should return a display builder page for any non admin route.
14	*
15	* @code
16	* route.name:
17	*  ...
18	*  options:
19	*    _admin_route: false
20	*    _display_builder_route: true
21	*
22	* @endcode
23	*/
24	class PageVariantSubscriber implements EventSubscriberInterface {
25
26	public function __construct(
27	private EntityTypeManagerInterface $entityTypeManager,
28	) {}
29
30	/**
31	* {@inheritdoc}
32	*/
33	public static function getSubscribedEvents(): array {
34	return [
35	RenderEvents::SELECT_PAGE_DISPLAY_VARIANT => [
36	['onSelectPageDisplayVariant', -100],
37	],
38	];
39	}
40
41	/**
42	* Selects the page display variant.
43	*
44	* @param \Drupal\Core\Render\PageDisplayVariantSelectionEvent $event
45	*   The event to process.
46	*/
47	public function onSelectPageDisplayVariant(PageDisplayVariantSelectionEvent $event): void {
48	$route = $event->getRouteMatch()->getRouteObject();
49	$options = $route->getOptions();
50
51	// In admin pages, we want the page.html.twig from the admin theme.
52	// For now we don't build pages for Admin routes, but this will be possible
53	// in the future.
54	if ($options['_admin_route'] ?? FALSE) {
55	return;
56	}
57
58	// When we use Display Builder to build the full page, we don't want to have
59	// neither the theme's page.html.twig nor the page managed by Display
60	// Builder. We want a simple blank page.
61	// Example: entity.page_layout.display_builder.
62	if ($options['_display_builder_route'] ?? FALSE) {
63	$event->setPluginId('simple_page');
64
65	return;
66	}
67
68	// Fallback to Block Layout if there is no suitable Page Layout entities.
69	/** @var \Drupal\display_builder_page_layout\AccessControlHandler $access_control */
70	$access_control = $this->entityTypeManager->getAccessControlHandler('page_layout');
71	$page_layout = $access_control->loadCurrentPageLayout();
72
73	// In DisplayBuilderPageVariant we add PageLayout::getCacheTags() to the
74	// page renderable but it works only for the pages already managed by
75	// Display Builder.
76	// So let's add a custom tag for the others.
77	/** @var \Drupal\Core\Config\Entity\ConfigEntityTypeInterface $entity_type */
78	$entity_type = $this->entityTypeManager->getDefinition('page_layout');
79	$event->addCacheTags([$entity_type->getConfigPrefix()]);
80
81	if (!$page_layout) {
82	return;
83	}
84
85	// Every other pages must be managed by Display Builder.
86	$event->setPluginId('display_builder');
87	}
88
89	}

---

Branches

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PageVariantSubscriber->__construct

26	public function __construct(
27	private EntityTypeManagerInterface $entityTypeManager,
28	) {}

PageVariantSubscriber->getSubscribedEvents

35	RenderEvents::SELECT_PAGE_DISPLAY_VARIANT => [
36	['onSelectPageDisplayVariant', -100],

PageVariantSubscriber->onSelectPageDisplayVariant

47	public function onSelectPageDisplayVariant(PageDisplayVariantSelectionEvent $event): void {
48	$route = $event->getRouteMatch()->getRouteObject();
49	$options = $route->getOptions();
50
51	// In admin pages, we want the page.html.twig from the admin theme.
52	// For now we don't build pages for Admin routes, but this will be possible
53	// in the future.
54	if ($options['_admin_route'] ?? FALSE) {

55

return;

62	if ($options['_display_builder_route'] ?? FALSE) {

63	$event->setPluginId('simple_page');
64
65	return;

70	$access_control = $this->entityTypeManager->getAccessControlHandler('page_layout');
71	$page_layout = $access_control->loadCurrentPageLayout();
72
73	// In DisplayBuilderPageVariant we add PageLayout::getCacheTags() to the
74	// page renderable but it works only for the pages already managed by
75	// Display Builder.
76	// So let's add a custom tag for the others.
77	/** @var \Drupal\Core\Config\Entity\ConfigEntityTypeInterface $entity_type */
78	$entity_type = $this->entityTypeManager->getDefinition('page_layout');
79	$event->addCacheTags([$entity_type->getConfigPrefix()]);
80
81	if (!$page_layout) {

82

return;

86	$event->setPluginId('display_builder');
87	}