gutenberg / build / scripts / block-library / paragraph.php

paragraph.php in Gutenberg 22.9.0, at build/scripts/block-library/paragraph.php

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1	<?php
2	/**
3	* Server-side rendering of the `core/paragraph` block.
4	*
5	* @package WordPress
6	*/
7
8	/**
9	* Append the `wp-block-paragraph` class before rendering the stored
10	* `core/paragraph` block contents.
11	*
12	* For example, the following block content:
13	* <p class="align-left">Hello World</p>
14	*
15	* Would be transformed to:
16	* <p class="align-left wp-block-paragraph">Hello World</p>
17	*
18	* @since 7.0.0
19	*
20	* @param string $block_content The block content.
21	*
22	* @return string Filtered block content.
23	*/
24	function gutenberg_block_core_paragraph_add_class( $block_content ) {
25	if ( ! $block_content ) {
26	return $block_content;
27	}
28
29	$processor = new WP_HTML_Tag_Processor( $block_content );
30
31	if ( $processor->next_tag( 'p' ) ) {
32	$processor->add_class( 'wp-block-paragraph' );
33	}
34
35	return $processor->get_updated_html();
36	}
37
38	add_filter( 'render_block_core/paragraph', 'gutenberg_block_core_paragraph_add_class' );
39
40	/**
41	* Registers the `core/paragraph` block on server.
42	*
43	* @since 7.0.0
44	*/
45	function gutenberg_register_block_core_paragraph() {
46	register_block_type_from_metadata( __DIR__ . '/paragraph' );
47	}
48	add_action( 'init', 'gutenberg_register_block_core_paragraph', 20 );
49