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<?php |
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/** |
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* Table of Contents block for Smart Post Show. |
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* |
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* @package Smart_Post_Show_Pro |
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* @subpackage Smart_Post_Show_Pro/blocks/includes |
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*/ |
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|
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namespace SmartPostShow\Blocks; |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* TOC class. |
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*/ |
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class SPS_Table_Of_Contents { |
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|
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/** |
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* Table of content block constructor function |
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*/ |
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public function __construct() { |
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add_filter( 'the_content', array( $this, 'add_ids_to_post_headings' ), 9 ); |
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} |
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|
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/** |
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* Add id to heading fallback function |
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* |
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* @param string $content Post content. |
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* @param string $permalink Post permalink. |
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* @return string $content HTML markup. |
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*/ |
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private function add_ids_to_headings_fallback( $content, $permalink ) { |
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$used_ids = array(); |
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|
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return preg_replace_callback( |
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'/<(h[1-6])(.*?)>(.*?)<\/\1>/is', |
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function ( $matches ) use ( &$used_ids, $permalink ) { |
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$tag = $matches[1]; |
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$attrs = $matches[2]; |
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$text = wp_strip_all_tags( $matches[3] ); |
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|
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// Skip if class contains sp-smart-post-title. |
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if ( preg_match( '/class=["\'][^"\']*sp-smart-post-title[^"\']*["\']/', $attrs ) ) { |
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return $matches[0]; |
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} |
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|
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// Skip if ID already exists. |
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if ( preg_match( '/id=["\'].*?["\']/', $attrs ) ) { |
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return $matches[0]; |
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} |
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|
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$id = sanitize_title( $text ); |
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|
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while ( in_array( $id, $used_ids, true ) ) { |
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$id .= '-' . wp_rand( 10, 99 ); |
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} |
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|
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$used_ids[] = $id; |
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|
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return sprintf( |
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'<%1$s%2$s><span id="%3$s"></span>%4$s<a href="#%3$s" class="sps-toc-heading-copy-link" data-url="%5$s#%3$s" title="Copy link to this heading">#</a></%1$s>', |
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$tag, |
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$attrs, |
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esc_attr( $id ), |
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$matches[3], |
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esc_url( $permalink ) |
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); |
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}, |
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$content |
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); |
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} |
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|
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/** |
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* Add id to heading function |
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* |
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* @param string $content Post content. |
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* @param string $permalink Post permalink. |
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* @return string $content HTML markup. |
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*/ |
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private function add_ids_to_headings( $content, $permalink ) { |
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if ( empty( $content ) ) { |
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return $content; |
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} |
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|
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return $this->add_ids_to_headings_fallback( $content, $permalink ); |
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} |
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|
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/** |
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* Check table of content function |
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* |
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* @param string $content Post content. |
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* @return boolean |
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*/ |
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private function has_toc_block( $content ) { |
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return preg_match( '/<!--\s*wp:sp-smart-post-show\/table-of-content/', $content ) |
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|| strpos( $content, 'sps-toc' ) !== false |
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|| preg_match( '/"blockName":"sp-smart-post-show\/table-of-content"/', $content ); |
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} |
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|
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/** |
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* Add_ids_to_post_headings function |
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* |
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* @param string $content Post content. |
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* @return string |
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*/ |
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public function add_ids_to_post_headings( $content ) { |
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if ( ! is_singular() || is_admin() || wp_doing_ajax() ) { |
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return $content; |
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} |
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|
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// Check if we're in the main query and it's the final output. |
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if ( ! in_the_loop() || ! is_main_query() ) { |
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return $content; |
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} |
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|
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$permalink = get_permalink(); |
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if ( is_single() && $this->has_toc_block( $content ) ) { |
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$content = $this->add_ids_to_headings( $content, $permalink ); |
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} elseif ( is_page() && $this->has_toc_block( $content ) ) { |
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$content = $this->add_ids_to_headings( $content, $permalink ); |
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} |
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|
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return $content; |
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} |
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} |
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|
