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<?php |
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/** |
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* Appending the wp-block-heading to before rendering the stored `core/heading` block contents. |
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* |
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* @package WordPress |
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*/ |
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|
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/** |
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* Adds a wp-block-heading class to the heading block content. |
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* |
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* For example, the following block content: |
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* <h2 class="align-left">Hello World</h2> |
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* |
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* Would be transformed to: |
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* <h2 class="align-left wp-block-heading">Hello World</h2> |
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* |
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* @since 6.2.0 |
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* |
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* @param array $attributes Attributes of the block being rendered. |
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* @param string $content Content of the block being rendered. |
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* |
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* @return string The content of the block being rendered. |
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*/ |
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function gutenberg_block_core_heading_render( $attributes, $content ) { |
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if ( ! $content ) { |
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return $content; |
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} |
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|
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$p = new WP_HTML_Tag_Processor( $content ); |
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|
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$header_tags = array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ); |
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while ( $p->next_tag() ) { |
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if ( in_array( $p->get_tag(), $header_tags, true ) ) { |
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$p->add_class( 'wp-block-heading' ); |
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break; |
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} |
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} |
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|
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return $p->get_updated_html(); |
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} |
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|
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/** |
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* Registers the `core/heading` block on server. |
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* |
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* @since 6.2.0 |
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*/ |
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function gutenberg_register_block_core_heading() { |
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register_block_type_from_metadata( |
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__DIR__ . '/heading', |
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array( |
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'render_callback' => 'gutenberg_block_core_heading_render', |
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) |
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); |
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} |
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|
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add_action( 'init', 'gutenberg_register_block_core_heading', 20 ); |
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|
