shadow.php in Gutenberg 23.2.0, at lib/block-supports/shadow.php

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1	<?php
2	/**
3	* Shadow block support flag.
4	*
5	* @package gutenberg
6	*/
7
8	/**
9	* Registers the style and shadow block attributes for block types that support it.
10	*
11	* @param WP_Block_Type $block_type Block Type.
12	*/
13	function gutenberg_register_shadow_support( $block_type ) {
14	$has_shadow_support = block_has_support( $block_type, array( 'shadow' ), false );
15
16	if ( ! $has_shadow_support ) {
17	return;
18	}
19
20	if ( ! $block_type->attributes ) {
21	$block_type->attributes = array();
22	}
23
24	if ( $has_shadow_support && ! array_key_exists( 'style', $block_type->attributes ) ) {
25	$block_type->attributes['style'] = array(
26	'type' => 'object',
27	);
28	}
29
30	if ( $has_shadow_support && ! array_key_exists( 'shadow', $block_type->attributes ) ) {
31	$block_type->attributes['shadow'] = array(
32	'type' => 'string',
33	);
34	}
35	}
36
37	/**
38	* Add CSS classes and inline styles for shadow features to the incoming attributes array.
39	* This will be applied to the block markup in
40	* the front-end.
41	*
42	* @param WP_Block_Type $block_type Block type.
43	* @param array $block_attributes Block attributes.
44	*
45	* @return array Shadow CSS classes and inline styles.
46	*/
47	function gutenberg_apply_shadow_support( $block_type, $block_attributes ) {
48	$has_shadow_support = block_has_support( $block_type, array( 'shadow' ), false );
49
50	if (
51	! $has_shadow_support \|\|
52	wp_should_skip_block_supports_serialization( $block_type, 'shadow' )
53	) {
54	return array();
55	}
56
57	$shadow_block_styles = array();
58
59	$custom_shadow = $block_attributes['style']['shadow'] ?? null;
60	$shadow_block_styles['shadow'] = $custom_shadow;
61
62	$attributes = array();
63	$styles = gutenberg_style_engine_get_styles( $shadow_block_styles );
64
65	if ( ! empty( $styles['css'] ) ) {
66	$attributes['style'] = $styles['css'];
67	}
68
69	return $attributes;
70	}
71
72	// Register the block support.
73	WP_Block_Supports::get_instance()->register(
74	'shadow',
75	array(
76	'register_attribute' => 'gutenberg_register_shadow_support',
77	'apply' => 'gutenberg_apply_shadow_support',
78	)
79	);
80