1	<?php
2
3	declare(strict_types=1);
4
5	namespace Drupal\display_builder\Event;
6
7	/**
8	* Defines events for the display builder.
9	*
10	* @see \Drupal\display_builder\Event\DisplayBuilderEvent
11	* @see \Drupal\display_builder\Island\IslandEventSubscriberInterface
12	*/
13	final class DisplayBuilderEvents {
14
15	/**
16	* Fired when a node's source configuration is updated in-place.
17	*/
18	public const ON_UPDATE = 'onUpdate';
19
20	/**
21	* Fired when a new node is attached directly at root level.
22	*/
23	public const ON_ATTACH_TO_ROOT = 'onAttachToRoot';
24
25	/**
26	* Fired when a new node is attached into a component slot.
27	*/
28	public const ON_ATTACH_TO_SLOT = 'onAttachToSlot';
29
30	/**
31	* Fired when an existing node is moved (to root or into a slot).
32	*/
33	public const ON_MOVE = 'onMove';
34
35	/**
36	* Fired when a node becomes the active/focused node in the UI.
37	*/
38	public const ON_ACTIVE = 'onActive';
39
40	/**
41	* Fired when a node is removed from the tree.
42	*/
43	public const ON_DELETE = 'onDelete';
44
45	/**
46	* Fired when the history pointer changes (undo / redo).
47	*/
48	public const ON_HISTORY_CHANGE = 'onHistoryChange';
49
50	/**
51	* Fired when the builder is restored to its last saved state.
52	*
53	* Discards all unsaved changes since the last explicit save.
54	*/
55	public const ON_RESTORE = 'onRestore';
56
57	/**
58	* Fired when an entity view override is reverted to the base display config.
59	*
60	* Handled by display_builder_entity_view; clears the field override and
61	* reloads sources from the entity view display configuration.
62	*/
63	public const ON_REVERT = 'onRevert';
64
65	/**
66	* Fired when the builder state is saved to the backing config entity.
67	*/
68	public const ON_PUBLISH = 'onPublish';
69
70	/**
71	* Fired when a node is saved as a reusable preset.
72	*/
73	public const ON_PRESET_SAVE = 'onPresetSave';
74
75	}

---

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