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<?php |
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/** |
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* Server-side rendering of the `core/table-of-contents` block. |
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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 an aria-label to the table of contents block content. |
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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_table_of_contents_render( $attributes, $content ) { |
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if ( ! $content ) { |
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return $content; |
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} |
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|
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// Get the aria-label from block attributes, or fallback to localized default. |
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$aria_label = empty( $attributes['ariaLabel'] ) ? __( 'Table of Contents' ) : wp_strip_all_tags( $attributes['ariaLabel'] ); |
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|
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$p = new WP_HTML_Tag_Processor( $content ); |
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|
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if ( $p->next_tag( 'nav' ) ) { |
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$p->set_attribute( 'aria-label', $aria_label ); |
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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/table-of-contents` block on the server. |
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*/ |
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function gutenberg_register_block_core_table_of_contents() { |
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register_block_type_from_metadata( |
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__DIR__ . '/table-of-contents', |
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array( |
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'render_callback' => 'gutenberg_block_core_table_of_contents_render', |
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) |
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); |
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} |
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add_action( 'init', 'gutenberg_register_block_core_table_of_contents', 20 ); |
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|
