| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* Plugin Name: SimpleTOC - Table of Contents Block |
| 5 |
* Plugin URI: https://marc.tv/simpletoc-wordpress-inhaltsverzeichnis-plugin-gutenberg/ |
| 6 |
* Description: SEO-friendly Table of Contents Gutenberg block. No JavaScript and no CSS means faster loading. |
| 7 |
* Version: 5.0.33 |
| 8 |
* Author: Marc Tönsing |
| 9 |
* Author URI: https://marc.tv |
| 10 |
* Text Domain: simpletoc |
| 11 |
* License: GPL v2 or later |
| 12 |
* License URI: http://www.gnu.org/licenses/gpl-2.0.html |
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* |
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*/ |
| 15 |
|
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/** |
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* Initalise frontend and backend and register block |
| 18 |
**/ |
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|
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function register_simpletoc_block() |
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{ |
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|
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wp_set_script_translations( 'simpletoc-toc-editor-script', 'simpletoc' ); |
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|
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add_filter('plugin_row_meta', __NAMESPACE__ . '\\simpletoc_plugin_meta', 10, 2); |
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|
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register_block_type( __DIR__ . '/build', [ |
| 28 |
'render_callback' => __NAMESPACE__ . '\\render_callback_simpletoc' |
| 29 |
]); |
| 30 |
|
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} |
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|
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add_action( 'init', 'register_simpletoc_block' ); |
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|
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/** |
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* Inject potentially missing translations into the block-editor i18n |
| 37 |
* collection. |
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* |
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* This keeps the plugin backwards compatible, in case the user did not |
| 40 |
* update translations on their website (yet). |
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* |
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* @param string|false|null $translations JSON-encoded translation data. Default null. |
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* @param string|false $file Path to the translation file to load. False if there isn't one. |
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* @param string $handle Name of the script to register a translation domain to. |
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* @param string $domain The text domain. |
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* |
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* @return string|false|null JSON string |
| 48 |
*/ |
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add_filter( 'load_script_translations', function($translations, $file, $handle, $domain) { |
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if ( 'simpletoc' === $domain && $translations ) { |
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// List of translations that we inject into the block-editor JS. |
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$dynamic_translations = [ |
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'Table of Contents' => __( 'Table of Contents', 'simpletoc' ), |
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]; |
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|
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$changed = false; |
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$obj = json_decode( $translations, true ); |
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|
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// Confirm that the translation JSON is valid. |
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if ( isset( $obj['locale_data'] ) && isset( $obj['locale_data']['messages'] ) ) { |
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$messages = $obj['locale_data']['messages']; |
| 62 |
|
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// Inject dynamic translations, when needed. |
| 64 |
foreach ( $dynamic_translations as $key => $locale ) { |
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if ( |
| 66 |
empty( $messages[ $key ] ) |
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|| ! is_array( $messages[$key] ) |
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|| ! array_key_exists( 0, $messages[ $key ] ) |
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|| $locale !== $messages[ $key ][0] |
| 70 |
) { |
| 71 |
$messages[ $key ] = [ $locale ]; |
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$changed = true; |
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} |
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} |
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|
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// Only modify the translations string when locales did change. |
| 77 |
if ( $changed ) { |
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$obj['locale_data']['messages'] = $messages; |
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$translations = wp_json_encode( $obj ); |
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} |
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} |
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} |
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|
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return $translations; |
| 85 |
}, 10, 4 ); |
| 86 |
|
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/** |
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* Sets the default value of translatable attributes. |
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* |
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* Values inside block.json are static strings that are not translated. This |
| 91 |
* filter inserts relevant translations i |
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* |
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* @param array $settings Array of determined settings for registering a block type. |
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* @param array $metadata Metadata provided for registering a block type. |
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* |
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* @return array Modified settings array. |
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*/ |
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add_filter( 'block_type_metadata_settings', function( $settings, $metadata ) { |
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if ( 'simpletoc/toc' === $metadata['name'] ) { |
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$settings['attributes']['title_text']['default'] = __( 'Table of Contents', 'simpletoc' ); |
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} |
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|
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return $settings; |
| 104 |
}, 10, 2); |
| 105 |
|
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/** |
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* Filter to add plugins to the TOC list for Rank Math plugin |
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* |
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* @param array TOC plugins. |
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*/ |
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|
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add_filter('rank_math/researches/toc_plugins', function ($toc_plugins) { |
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$toc_plugins['simpletoc/plugin.php'] = 'SimpleTOC'; |
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return $toc_plugins; |
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}); |
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|
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add_filter( 'the_content', 'simpletoc_addIDstoContent', 1 ); |
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|
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function simpletoc_addIDstoContent( $content ) { |
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|
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$blocks = parse_blocks( $content ); |
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|
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$blocks = addIDstoBlocks_recursive( $blocks ); |
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|
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$content = serialize_blocks( $blocks ); |
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|
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return $content; |
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} |
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|
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function addIDstoBlocks_recursive( $blocks ) { |
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|
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foreach ( $blocks as &$block ) { |
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if (isset($block['blockName']) && ( $block['blockName'] === 'core/heading' || $block['blockName'] === 'generateblocks/headline') && isset($block['innerHTML']) && isset($block['innerContent']) && isset($block['innerContent'][0]) ){ |
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$block['innerHTML'] = addAnchorAttribute($block['innerHTML']); |
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$block['innerContent'][0] = addAnchorAttribute($block['innerContent'][0]); |
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} else if( isset($block['attrs']['ref']) ){ |
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// search in reusable blocks (this is not finished because I ran out of ideas.) |
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// $reusable_block_id = $block['attrs']['ref']; |
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// $reusable_block_content = parse_blocks(get_post($reusable_block_id)->post_content); |
| 140 |
} else if ( ! empty( $block['innerBlocks'] ) ) { |
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// search in groups |
| 142 |
$block['innerBlocks'] = addIDstoBlocks_recursive( $block['innerBlocks'] ); |
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} |
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} |
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|
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return $blocks; |
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} |
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|
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/** |
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* Render block output |
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* |
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*/ |
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|
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function render_callback_simpletoc( $attributes ) |
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{ |
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|
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$is_backend = defined('REST_REQUEST') && true === REST_REQUEST && 'edit' === filter_input(INPUT_GET, 'context'); |
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|
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$title_text = esc_html( trim( $attributes['title_text'] ) ); |
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if ( ! $title_text ) { |
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$title_text = __('Table of Contents', 'simpletoc'); |
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} |
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|
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$alignclass = ''; |
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if ( isset ($attributes['align']) ) { |
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$align = $attributes['align']; |
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$alignclass = 'align' . $align; |
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} |
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|
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$className = ''; |
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if ( isset( $attributes['className'] ) ) { |
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$className = strip_tags(htmlspecialchars($attributes['className'] )); |
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} |
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|
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$pre_html = ''; |
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$post_html = ''; |
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|
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// By default, the wrapper is not enabled because it causes problems on some themes |
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$wrapper_enabled = apply_filters( 'simpletoc_wrapper_enabled', false ); |
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|
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if ( $className !== ''|| $wrapper_enabled ) { |
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$wrapper_attrs = get_block_wrapper_attributes( [ 'class' => 'simpletoc' ] ); |
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$pre_html = "<div $wrapper_attrs>"; |
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$post_html = '</div>'; |
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} |
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|
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$post = get_post(); |
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if ( is_null($post) || is_null($post->post_content) ) { |
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$blocks = ''; |
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} else { |
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$blocks = parse_blocks($post->post_content); |
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} |
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|
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if ( empty($blocks) ) { |
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$html = ''; |
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if( $is_backend == true ) { |
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if ($attributes['no_title'] == false) { |
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$html = '<h2 class="simpletoc-title ' . $alignclass . '">' . $title_text . '</h2>'; |
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} |
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|
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$html .= '<p class="components-notice is-warning ' . $alignclass . '">' . __('No blocks found.', 'simpletoc') . ' ' . __('Save or update post first.', 'simpletoc') . '</p>'; |
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} |
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return $html; |
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} |
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|
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$headings = array_reverse(filter_headings_recursive($blocks)); |
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|
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// enrich headings with pages as a data-attribute |
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$headings = simpletoc_add_pagenumber($blocks, $headings); |
| 210 |
|
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$headings_clean = array_map('trim', $headings); |
| 212 |
|
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if ( empty( $headings_clean ) ) { |
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$html = ''; |
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if( $is_backend == true ) { |
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|
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if ($attributes['no_title'] == false) { |
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$html = '<h2 class="simpletoc-title ' . $alignclass . '">' . $title_text . '</h2>'; |
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} |
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|
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$html .= '<p class="components-notice is-warning ' . $alignclass . '">' . __('No headings found.', 'simpletoc') . ' ' . __('Save or update post first.', 'simpletoc') . '</p>'; |
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} |
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return $html; |
| 224 |
} |
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|
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$toclist = generateToc($headings_clean, $attributes); |
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|
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if ( empty( $toclist ) ) { |
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$html = ''; |
| 230 |
if( $is_backend == true ) { |
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|
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if ($attributes['no_title'] == false) { |
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$html = '<h2 class="simpletoc-title ' . $alignclass . '">' . $title_text . '</h2>'; |
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} |
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|
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$html .= '<p class="components-notice is-warning ' . $alignclass . '">' . __('No headings found.', 'simpletoc') . ' ' . __('Check minimal and maximum level block settings.', 'simpletoc') . '</p>'; |
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} |
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return $html; |
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|
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} |
| 241 |
|
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$output = $pre_html . $toclist . $post_html; |
| 243 |
|
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return $output; |
| 245 |
} |
| 246 |
|
| 247 |
|
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function simpletoc_add_pagenumber( $blocks, $headings ){ |
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$pages = 1; |
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|
| 251 |
foreach ($blocks as $block => $innerBlock) { |
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|
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// count nextpage blocks |
| 254 |
if (isset($blocks[$block]['blockName']) && $blocks[$block]['blockName'] === 'core/nextpage' ){ |
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$pages++; |
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} |
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|
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if (isset($blocks[$block]['blockName']) && $blocks[$block]["blockName"] === 'core/heading') { |
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// make sure its a headline. |
| 260 |
foreach ($headings as $heading => &$innerHeading){ |
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if($innerHeading == $blocks[$block]["innerHTML"]){ |
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$innerHeading = preg_replace("/(<h1|<h2|<h3|<h4|<h5|<h6)/i", '$1 data-page="' . $pages . '"', $blocks[$block]["innerHTML"]); |
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} |
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} |
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} |
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} |
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return $headings; |
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} |
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|
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/** |
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* Return all headings with a recursive walk through all blocks. |
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* This includes groups and reusable block with groups within reusable blocks. |
| 273 |
* @var array[] $blocks |
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* @return array[] |
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*/ |
| 276 |
function filter_headings_recursive( array $blocks ): array { |
| 277 |
$arr = []; |
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// allow developers to ignore specific blocks |
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$ignored_blocks = apply_filters( 'simpletoc_excluded_blocks', [] ); |
| 280 |
|
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foreach ( $blocks as $innerBlock ) { |
| 282 |
|
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if ( is_array( $innerBlock ) ) { |
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|
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// if block is ignored, skip |
| 286 |
if ( isset( $innerBlock['blockName'] ) && in_array( $innerBlock['blockName'], $ignored_blocks ) ) { |
| 287 |
continue; |
| 288 |
} |
| 289 |
|
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if ( isset( $innerBlock['attrs']['ref'] ) ) { |
| 291 |
// search in reusable blocks |
| 292 |
$e_arr = parse_blocks( get_post( $innerBlock['attrs']['ref'] )->post_content ); |
| 293 |
$arr = array_merge( filter_headings_recursive( $e_arr ), $arr ); |
| 294 |
} else { |
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// search in groups |
| 296 |
$arr = array_merge( filter_headings_recursive( $innerBlock ), $arr ); |
| 297 |
} |
| 298 |
} else { |
| 299 |
|
| 300 |
if ( isset( $blocks['blockName'] ) && ( $blocks['blockName'] === 'core/heading' ) && $innerBlock !== 'core/heading' ) { |
| 301 |
// make sure it's a headline. |
| 302 |
if ( preg_match( "/(<h1|<h2|<h3|<h4|<h5|<h6)/i", $innerBlock ) ) { |
| 303 |
$arr[] = $innerBlock; |
| 304 |
} |
| 305 |
} |
| 306 |
|
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if ( isset( $blocks['blockName'] ) && ( $blocks['blockName'] === 'generateblocks/headline' ) && $innerBlock !== 'core/heading' ) { |
| 308 |
// make sure it's a headline. |
| 309 |
if ( preg_match( "/(<h1|<h2|<h3|<h4|<h5|<h6)/i", $innerBlock ) ) { |
| 310 |
$arr[] = $innerBlock; |
| 311 |
} |
| 312 |
} |
| 313 |
} |
| 314 |
} |
| 315 |
|
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return $arr; |
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} |
| 318 |
|
| 319 |
/** |
| 320 |
* Remove all problematic characters for toc links |
| 321 |
*/ |
| 322 |
|
| 323 |
function simpletoc_sanitize_string( $string ) |
| 324 |
{ |
| 325 |
// remove punctuation |
| 326 |
$zero_punctuation = preg_replace("/\p{P}/u", "", $string); |
| 327 |
// remove non-breaking spaces |
| 328 |
$html_wo_nbs = str_replace(" ", " ", $zero_punctuation); |
| 329 |
// remove umlauts and accents |
| 330 |
$string_without_accents = remove_accents($html_wo_nbs); |
| 331 |
// Sanitizes a title, replacing whitespace and a few other characters with dashes. |
| 332 |
$sanitized_string = sanitize_title_with_dashes($string_without_accents); |
| 333 |
// Encode for use in an url |
| 334 |
$urlencoded = urlencode($sanitized_string); |
| 335 |
return $urlencoded; |
| 336 |
} |
| 337 |
|
| 338 |
function simpletoc_plugin_meta( $links, $file ) |
| 339 |
{ |
| 340 |
|
| 341 |
if (false !== strpos($file, 'simpletoc')) { |
| 342 |
$links = array_merge($links, array('<a href="https://wordpress.org/support/plugin/simpletoc">' . __('Support', 'simpletoc') . '</a>')); |
| 343 |
$links = array_merge($links, array('<a href="https://marc.tv/out/donate">' . __('Donate', 'simpletoc') . '</a>')); |
| 344 |
$links = array_merge($links, array('<a href="https://wordpress.org/support/plugin/simpletoc/reviews/#new-post">' . __('Write a review', 'simpletoc') . ' ⭐️⭐️⭐️⭐️⭐️</a>')); |
| 345 |
} |
| 346 |
|
| 347 |
return $links; |
| 348 |
} |
| 349 |
|
| 350 |
function addAnchorAttribute( $html ) |
| 351 |
{ |
| 352 |
|
| 353 |
// remove non-breaking space entites from input HTML |
| 354 |
$html_wo_nbs = str_replace(" ", " ", $html); |
| 355 |
|
| 356 |
// Thank you Nick Diego |
| 357 |
if (!$html_wo_nbs) { |
| 358 |
return $html; |
| 359 |
} |
| 360 |
|
| 361 |
libxml_use_internal_errors(TRUE); |
| 362 |
$dom = new \DOMDocument(); |
| 363 |
@$dom->loadHTML($html_wo_nbs, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD); |
| 364 |
|
| 365 |
// use xpath to select the Heading html tags. |
| 366 |
$xpath = new \DOMXPath($dom); |
| 367 |
$tags = $xpath->evaluate("//*[self::h1 or self::h2 or self::h3 or self::h4 or self::h5 or self::h6]"); |
| 368 |
|
| 369 |
// Loop through all the found tags |
| 370 |
foreach ($tags as $tag) { |
| 371 |
// if tag already has an attribute "id" defined, no need for creating a new one |
| 372 |
if (!empty($tag->getAttribute('id'))) {continue;} |
| 373 |
// Set id attribute |
| 374 |
$heading_text = strip_tags($html); |
| 375 |
$anchor = simpletoc_sanitize_string($heading_text); |
| 376 |
$tag->setAttribute("id", $anchor); |
| 377 |
} |
| 378 |
|
| 379 |
// Save the HTML changes |
| 380 |
$content = utf8_decode($dom->saveHTML($dom->documentElement)); |
| 381 |
|
| 382 |
return $content; |
| 383 |
} |
| 384 |
|
| 385 |
function generateToc( $headings, $attributes ) |
| 386 |
{ |
| 387 |
|
| 388 |
$list = ''; |
| 389 |
$html = ''; |
| 390 |
$min_depth = 6; |
| 391 |
$listtype = 'ul'; |
| 392 |
$absolute_url = ''; |
| 393 |
$inital_depth = 6; |
| 394 |
$link_class = ''; |
| 395 |
$styles = ''; |
| 396 |
|
| 397 |
$title_text = esc_html( trim( $attributes['title_text'] ) ); |
| 398 |
if ( ! $title_text ) { |
| 399 |
$title_text = __('Table of Contents', 'simpletoc'); |
| 400 |
} |
| 401 |
|
| 402 |
$alignclass = ''; |
| 403 |
if ( isset ($attributes['align']) ) { |
| 404 |
$align = $attributes['align']; |
| 405 |
$alignclass = 'align' . $align; |
| 406 |
} |
| 407 |
|
| 408 |
if ($attributes['remove_indent'] == true) { |
| 409 |
$styles = 'style="padding-left:0;list-style:none;"'; |
| 410 |
} |
| 411 |
|
| 412 |
if ($attributes['add_smooth'] == true) { |
| 413 |
$link_class = 'class="smooth-scroll"'; |
| 414 |
} |
| 415 |
|
| 416 |
if ($attributes['use_ol'] == true) { |
| 417 |
$listtype = 'ol'; |
| 418 |
} |
| 419 |
|
| 420 |
if ($attributes['use_absolute_urls'] == true) { |
| 421 |
$absolute_url = get_permalink(); |
| 422 |
} |
| 423 |
|
| 424 |
foreach ($headings as $line => $headline) { |
| 425 |
if ($min_depth > $headings[$line][2]) { |
| 426 |
// search for lowest level |
| 427 |
$min_depth = (int) $headings[$line][2]; |
| 428 |
$inital_depth = $min_depth; |
| 429 |
} |
| 430 |
} |
| 431 |
|
| 432 |
/* If there is a custom min level, make sure it is the baseline. */ |
| 433 |
if ($attributes['min_level'] > $min_depth) { |
| 434 |
$min_depth = $attributes['min_level']; |
| 435 |
} |
| 436 |
|
| 437 |
$itemcount = 0; |
| 438 |
|
| 439 |
foreach ($headings as $line => $headline) { |
| 440 |
|
| 441 |
$title = strip_tags($headline); |
| 442 |
$page = ''; |
| 443 |
$dom = new \DOMDocument(); |
| 444 |
@$dom->loadHTML($headline, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD); |
| 445 |
$xpath = new \DOMXPath($dom); |
| 446 |
$nodes = $xpath->query('//*/@data-page'); |
| 447 |
|
| 448 |
if ( isset($nodes[0] ) && $nodes[0]->nodeValue > 1) { |
| 449 |
$page = $nodes[0]->nodeValue . '/'; |
| 450 |
$absolute_url = get_permalink(); |
| 451 |
} |
| 452 |
|
| 453 |
$link = simpletoc_sanitize_string($title); |
| 454 |
if (isset($nodes[0]) && !empty($nodes[0]->ownerElement->getAttribute('id'))) { |
| 455 |
// if the node already has an attribute id, use that as anchor |
| 456 |
$link = $nodes[0]->ownerElement->getAttribute('id'); |
| 457 |
} |
| 458 |
|
| 459 |
$this_depth = (int) $headings[$line][2]; |
| 460 |
if (isset($headings[$line + 1][2])) { |
| 461 |
$next_depth = (int) $headings[$line + 1][2]; |
| 462 |
} else { |
| 463 |
$next_depth = ''; |
| 464 |
} |
| 465 |
|
| 466 |
// skip this heading because a max depth is set. |
| 467 |
if ($this_depth > $attributes['max_level'] or strpos($headline, 'class="simpletoc-hidden') > 0) { |
| 468 |
goto closelist; |
| 469 |
} |
| 470 |
|
| 471 |
// skip this heading because a min depth is set. |
| 472 |
if( $this_depth < $attributes['min_level'] ){ |
| 473 |
continue; |
| 474 |
} |
| 475 |
|
| 476 |
$itemcount++; |
| 477 |
|
| 478 |
// start list |
| 479 |
if ($this_depth == $min_depth) { |
| 480 |
$list .= "<li>\n"; |
| 481 |
} else { |
| 482 |
// we are not as base level. Start opening levels until base is reached. |
| 483 |
for ($min_depth; $min_depth < $this_depth; $min_depth++) { |
| 484 |
$list .= "\n\t\t<" . $listtype . "><li>\n"; |
| 485 |
} |
| 486 |
} |
| 487 |
|
| 488 |
$list .= "<a " . $link_class . " href=\"" . $absolute_url . esc_html($page) . "#" . $link . "\">" . $title . "</a>"; |
| 489 |
|
| 490 |
closelist: |
| 491 |
// close lists |
| 492 |
// check if this is not the last heading |
| 493 |
if ($line != count($headings) - 1) { |
| 494 |
// do we need to close the door behind us? |
| 495 |
if ($min_depth > $next_depth) { |
| 496 |
// If yes, how many times? |
| 497 |
for ($min_depth; $min_depth > $next_depth; $min_depth--) { |
| 498 |
$list .= "</li></" . $listtype . ">\n"; |
| 499 |
} |
| 500 |
} |
| 501 |
if ($min_depth == $next_depth) { |
| 502 |
$list .= "</li>"; |
| 503 |
} |
| 504 |
// last heading |
| 505 |
} else { |
| 506 |
for ($inital_depth; $inital_depth < $this_depth; $inital_depth++) { |
| 507 |
$list .= "</li></" . $listtype . ">\n"; |
| 508 |
} |
| 509 |
} |
| 510 |
} |
| 511 |
|
| 512 |
if ($attributes['no_title'] == false) { |
| 513 |
$html = "<h2 class=\"simpletoc-title\">" . $title_text . "</h2>"; |
| 514 |
} |
| 515 |
$html .= "<" . $listtype . " class=\"simpletoc-list\" " . $styles ." " . $alignclass .">\n" . $list . "</li></" . $listtype . ">"; |
| 516 |
|
| 517 |
if($itemcount < 1) { |
| 518 |
$html = ''; |
| 519 |
} |
| 520 |
|
| 521 |
return $html; |
| 522 |
} |
| 523 |
|
