| @@ -1,430 +1,1051 @@ | ||
| 1 | 1 | <?php |
| 2 | - | |
| 3 | 2 | /** |
| 4 | 3 | * Plugin Name: SimpleTOC - Table of Contents Block |
| 5 | 4 | * Plugin URI: https://marc.tv/simpletoc-wordpress-inhaltsverzeichnis-plugin-gutenberg/ |
| 6 | - * Description: Adds a basic "Table of Contents" Gutenberg block. | |
| 7 | - * Version: 5.0.22 | |
| 5 | + * Description: SEO-friendly Table of Contents Gutenberg block. No JavaScript or CSS by default. | |
| 6 | + * Version: 7.3.1 | |
| 7 | + * Requires at least: 6.2 | |
| 8 | + * Requires PHP: 7.3 | |
| 8 | 9 | * Author: Marc Tönsing |
| 9 | - * Author URI: https://marc.tv | |
| 10 | + * Author URI: https://toensing.com | |
| 10 | 11 | * Text Domain: simpletoc |
| 11 | 12 | * License: GPL v2 or later |
| 12 | 13 | * License URI: http://www.gnu.org/licenses/gpl-2.0.html |
| 13 | - * | |
| 14 | + * | |
| 15 | + * @package simpletoc | |
| 14 | 16 | */ |
| 15 | 17 | |
| 18 | +namespace MToensing\SimpleTOC; | |
| 19 | + | |
| 20 | +require_once __DIR__ . '/simpletoc-admin-settings.php'; | |
| 21 | +require_once __DIR__ . '/simpletoc-class-headline-ids.php'; | |
| 22 | + | |
| 23 | +const DEFAULT_BOX_COLOR = '#ebebeb'; | |
| 24 | +const SIMPLETOC_VERSION = '7.3.1'; | |
| 25 | + | |
| 16 | 26 | /** |
| 17 | - * Initalise frontend and backend and register block | |
| 18 | - **/ | |
| 27 | + * Prevents direct execution of the plugin file. | |
| 28 | + * If a WordPress function does not exist, it means that the file has not been run by WordPress. | |
| 29 | + */ | |
| 30 | +if ( ! defined( 'ABSPATH' ) || ! function_exists( 'add_filter' ) ) { | |
| 31 | + header( 'Status: 403 Forbidden' ); | |
| 32 | + header( 'HTTP/1.1 403 Forbidden' ); | |
| 33 | + exit; | |
| 34 | +} | |
| 19 | 35 | |
| 20 | -function register_simpletoc_block() | |
| 21 | -{ | |
| 36 | +/** | |
| 37 | + * Registers the SimpleTOC block, adds a filter for plugin row meta, and sets script translations. | |
| 38 | + * | |
| 39 | + * This function registers the SimpleTOC block by specifying the build directory and render callback function. | |
| 40 | + * It also sets the script translations for the block editor script and adds a filter for the plugin row meta. | |
| 41 | + */ | |
| 42 | +function register_simpletoc_block() { | |
| 22 | 43 | |
| 23 | - wp_set_script_translations( 'simpletoc-toc-editor-script', 'simpletoc' ); | |
| 44 | + if ( function_exists( 'wp_set_script_translations' ) ) { | |
| 45 | + wp_set_script_translations( 'simpletoc-toc-editor-script', 'simpletoc' ); | |
| 46 | + } | |
| 24 | 47 | |
| 25 | - add_filter('plugin_row_meta', __NAMESPACE__ . '\\simpletoc_plugin_meta', 10, 2); | |
| 48 | + add_filter( 'plugin_row_meta', __NAMESPACE__ . '\simpletoc_plugin_meta', 10, 2 ); | |
| 26 | 49 | |
| 27 | - register_block_type( __DIR__ . '/build' , [ | |
| 28 | - 'render_callback' => __NAMESPACE__ . '\\render_callback' | |
| 29 | - ]); | |
| 50 | + register_block_type( | |
| 51 | + __DIR__ . '/build', | |
| 52 | + array( | |
| 53 | + 'render_callback' => __NAMESPACE__ . '\render_callback_simpletoc', | |
| 54 | + ) | |
| 55 | + ); | |
| 30 | 56 | |
| 57 | + wp_add_inline_script( | |
| 58 | + 'simpletoc-toc-editor-script', | |
| 59 | + 'window.simpletocEditorSettings = ' . wp_json_encode( | |
| 60 | + array( | |
| 61 | + 'settingsUrl' => admin_url( 'options-general.php?page=simpletoc' ), | |
| 62 | + ) | |
| 63 | + ) . ';', | |
| 64 | + 'before' | |
| 65 | + ); | |
| 31 | 66 | } |
| 32 | 67 | |
| 33 | -add_action( 'init', 'register_simpletoc_block' ); | |
| 68 | +add_action( 'init', __NAMESPACE__ . '\register_simpletoc_block' ); | |
| 34 | 69 | |
| 35 | 70 | /** |
| 36 | - * Filter to add plugins to the TOC list for Rank Math plugin | |
| 71 | + * Adds SimpleTOC-specific block editor settings. | |
| 37 | 72 | * |
| 38 | - * @param array TOC plugins. | |
| 73 | + * @param array $editor_settings Default editor settings. | |
| 74 | + * @param \WP_Block_Editor_Context $editor_context Editor context. | |
| 75 | + * | |
| 76 | + * @return array | |
| 39 | 77 | */ |
| 78 | +function add_simpletoc_block_editor_settings( $editor_settings, $editor_context ) { | |
| 79 | + $editor_settings['simpletocSettingsUrl'] = admin_url( 'options-general.php?page=simpletoc' ); | |
| 40 | 80 | |
| 41 | -add_filter('rank_math/researches/toc_plugins', function ($toc_plugins) { | |
| 42 | - $toc_plugins['simpletoc/plugin.php'] = 'SimpleTOC'; | |
| 43 | - return $toc_plugins; | |
| 44 | -}); | |
| 81 | + return $editor_settings; | |
| 82 | +} | |
| 45 | 83 | |
| 46 | -add_filter( 'the_content', 'simpletoc_addIDstoContent', 1 ); | |
| 47 | - | |
| 48 | -function simpletoc_addIDstoContent( $content ) { | |
| 84 | +add_filter( 'block_editor_settings_all', __NAMESPACE__ . '\add_simpletoc_block_editor_settings', 10, 2 ); | |
| 49 | 85 | |
| 50 | - $blocks = parse_blocks( $content ); | |
| 86 | +/** | |
| 87 | + * Inject potentially missing translations into the block-editor i18n | |
| 88 | + * collection. | |
| 89 | + * | |
| 90 | + * This keeps the plugin backwards compatible, in case the user did not | |
| 91 | + * update translations on their website (yet). | |
| 92 | + * | |
| 93 | + * @param string|false|null $translations JSON-encoded translation data. Default null. | |
| 94 | + * @param string|false $file Path to the translation file to load. False if there isn't one. | |
| 95 | + * @param string $handle Name of the script to register a translation domain to. | |
| 96 | + * @param string $domain The text domain. | |
| 97 | + * | |
| 98 | + * @return string|false|null JSON string | |
| 99 | + */ | |
| 100 | +add_filter( | |
| 101 | + 'load_script_translations', | |
| 102 | + function ( $translations, $file, $handle, $domain ) { | |
| 103 | + if ( 'simpletoc' === $domain && $translations ) { | |
| 104 | + // List of translations that we inject into the block-editor JS. | |
| 105 | + $dynamic_translations = array( | |
| 106 | + 'Table of Contents' => __( 'Table of Contents', 'simpletoc' ), | |
| 107 | + ); | |
| 51 | 108 | |
| 52 | - $blocks = addIDstoBlocks_recursive( $blocks ); | |
| 109 | + $changed = false; | |
| 110 | + $obj = json_decode( $translations, true ); | |
| 53 | 111 | |
| 54 | - $content = serialize_blocks( $blocks ); | |
| 55 | - | |
| 56 | - return $content; | |
| 112 | + // Confirm that the translation JSON is valid. | |
| 113 | + if ( isset( $obj['locale_data'] ) && isset( $obj['locale_data']['messages'] ) ) { | |
| 114 | + $messages = $obj['locale_data']['messages']; | |
| 115 | + | |
| 116 | + // Inject dynamic translations, when needed. | |
| 117 | + foreach ( $dynamic_translations as $key => $locale ) { | |
| 118 | + if ( empty( $messages[ $key ] ) | |
| 119 | + || ! is_array( $messages[ $key ] ) | |
| 120 | + || ! array_key_exists( 0, $messages[ $key ] ) | |
| 121 | + || $locale !== $messages[ $key ][0] | |
| 122 | + ) { | |
| 123 | + $messages[ $key ] = array( $locale ); | |
| 124 | + $changed = true; | |
| 125 | + } | |
| 126 | + } | |
| 127 | + | |
| 128 | + // Only modify the translations string when locales did change. | |
| 129 | + if ( $changed ) { | |
| 130 | + $obj['locale_data']['messages'] = $messages; | |
| 131 | + $translations = wp_json_encode( $obj ); | |
| 132 | + } | |
| 133 | + } | |
| 134 | + } | |
| 135 | + | |
| 136 | + return $translations; | |
| 137 | + }, | |
| 138 | + 10, | |
| 139 | + 4 | |
| 140 | +); | |
| 141 | + | |
| 142 | +/** | |
| 143 | + * Sets the default value of translatable attributes. | |
| 144 | + * | |
| 145 | + * Values inside block.json are static strings that are not translated. This | |
| 146 | + * filter inserts relevant translations i | |
| 147 | + * | |
| 148 | + * @param array $settings Array of determined settings for registering a block type. | |
| 149 | + * @param array $metadata Metadata provided for registering a block type. | |
| 150 | + * | |
| 151 | + * @return array Modified settings array. | |
| 152 | + */ | |
| 153 | +add_filter( | |
| 154 | + 'block_type_metadata_settings', | |
| 155 | + function ( $settings, $metadata ) { | |
| 156 | + if ( 'simpletoc/toc' === $metadata['name'] ) { | |
| 157 | + $settings['attributes']['title_text']['default'] = __( 'Table of Contents', 'simpletoc' ); | |
| 158 | + } | |
| 159 | + | |
| 160 | + return $settings; | |
| 161 | + }, | |
| 162 | + 10, | |
| 163 | + 2 | |
| 164 | +); | |
| 165 | + | |
| 166 | +/** | |
| 167 | + * Filter to add plugins to the TOC list for Rank Math plugin. | |
| 168 | + * | |
| 169 | + * @param array $toc_plugins TOC plugins. | |
| 170 | + */ | |
| 171 | +add_filter( | |
| 172 | + 'rank_math/researches/toc_plugins', | |
| 173 | + function ( $toc_plugins ) { | |
| 174 | + $toc_plugins['simpletoc/plugin.php'] = 'SimpleTOC'; | |
| 175 | + return $toc_plugins; | |
| 176 | + } | |
| 177 | +); | |
| 178 | + | |
| 179 | + | |
| 180 | + | |
| 181 | +/** | |
| 182 | + * Adds IDs to the headings of the provided post content using a recursive block structure. | |
| 183 | + * | |
| 184 | + * @param string $content The content to add IDs to. | |
| 185 | + * @return string The content with IDs added to its headings | |
| 186 | + */ | |
| 187 | +function simpletoc_add_ids_to_content( $content ) { | |
| 188 | + | |
| 189 | + $blocks = parse_blocks( $content ); | |
| 190 | + | |
| 191 | + $blocks = add_ids_to_blocks_recursive( $blocks ); | |
| 192 | + | |
| 193 | + $content = serialize_blocks( $blocks ); | |
| 194 | + | |
| 195 | + return $content; | |
| 57 | 196 | } |
| 58 | 197 | |
| 59 | -function addIDstoBlocks_recursive( $blocks ) { | |
| 198 | +add_filter( 'the_content', __NAMESPACE__ . '\simpletoc_add_ids_to_content', 1 ); | |
| 60 | 199 | |
| 61 | - foreach ( $blocks as &$block ) { | |
| 62 | - if (isset($block['blockName']) && ( $block['blockName'] === 'core/heading' || $block['blockName'] === 'generateblocks/headline') && isset($block['innerHTML']) && isset($block['innerContent']) && isset($block['innerContent'][0]) ){ | |
| 63 | - $block['innerHTML'] = addAnchorAttribute($block['innerHTML']); | |
| 64 | - $block['innerContent'][0] = addAnchorAttribute($block['innerContent'][0]); | |
| 65 | - } else if( isset($block['attrs']['ref']) ){ | |
| 66 | - // search in reusable blocks (this is not finished because I ran out of ideas.) | |
| 67 | - // $reusable_block_id = $block['attrs']['ref']; | |
| 68 | - // $reusable_block_content = parse_blocks(get_post($reusable_block_id)->post_content); | |
| 69 | - } else if ( ! empty( $block['innerBlocks'] ) ) { | |
| 70 | - // search in groups | |
| 71 | - $block['innerBlocks'] = addIDstoBlocks_recursive( $block['innerBlocks'] ); | |
| 72 | - } | |
| 73 | - } | |
| 200 | +/** | |
| 201 | + * Recursively adds IDs to the headings of a nested block structure. | |
| 202 | + * | |
| 203 | + * @param array $blocks The blocks to add IDs to. | |
| 204 | + * @return array The blocks with IDs added to their headings | |
| 205 | + */ | |
| 206 | +function add_ids_to_blocks_recursive( $blocks ) { | |
| 74 | 207 | |
| 75 | - return $blocks; | |
| 208 | + $supported_blocks = array( | |
| 209 | + 'core/heading', | |
| 210 | + 'generateblocks/text', | |
| 211 | + 'generateblocks/headline', | |
| 212 | + ); | |
| 213 | + | |
| 214 | + /** | |
| 215 | + * Filter to add supported blocks for IDs. | |
| 216 | + * | |
| 217 | + * @param array $supported_blocks The array of supported blocks. | |
| 218 | + */ | |
| 219 | + $supported_blocks = apply_filters( 'simpletoc_supported_blocks_for_ids', $supported_blocks ); | |
| 220 | + | |
| 221 | + // Need two separate instances so that IDs aren't double counted. | |
| 222 | + $inner_html_id_instance = new SimpleTOC_Headline_Ids(); | |
| 223 | + $inner_content_id_instance = new SimpleTOC_Headline_Ids(); | |
| 224 | + | |
| 225 | + foreach ( $blocks as &$block ) { | |
| 226 | + if ( isset( $block['blockName'] ) && in_array( $block['blockName'], $supported_blocks, true ) && isset( $block['innerHTML'] ) && isset( $block['innerContent'] ) && isset( $block['innerContent'][0] ) ) { | |
| 227 | + $block['innerHTML'] = add_anchor_attribute( $block['innerHTML'], $inner_html_id_instance, $block ); | |
| 228 | + $block['innerContent'][0] = add_anchor_attribute( $block['innerContent'][0], $inner_content_id_instance, $block ); | |
| 229 | + } elseif ( ! empty( $block['innerBlocks'] ) ) { | |
| 230 | + // search in groups. | |
| 231 | + $block['innerBlocks'] = add_ids_to_blocks_recursive( $block['innerBlocks'] ); | |
| 232 | + } | |
| 233 | + } | |
| 234 | + | |
| 235 | + return $blocks; | |
| 76 | 236 | } |
| 77 | 237 | |
| 78 | 238 | /** |
| 79 | - * Render block output | |
| 239 | + * Renders a Table of Contents block for a post | |
| 80 | 240 | * |
| 241 | + * @param array $attributes An array of attributes for the Table of Contents block. | |
| 242 | + * @return string The HTML output for the Table of Contents block | |
| 81 | 243 | */ |
| 244 | +function render_callback_simpletoc( $attributes ) { | |
| 245 | + $is_backend = defined( 'REST_REQUEST' ) && REST_REQUEST && 'edit' === filter_input( INPUT_GET, 'context' ); | |
| 246 | + $title_text = $attributes['title_text'] ? esc_html( trim( $attributes['title_text'] ) ) : __( 'Table of Contents', 'simpletoc' ); | |
| 247 | + $alignclass = ! empty( $attributes['align'] ) ? 'align' . $attributes['align'] : ''; | |
| 248 | + $title_level = $attributes['title_level']; | |
| 249 | + $global_box_style_enabled = apply_filters( 'simpletoc_box_style_enabled', false ) || true === (bool) get_option( 'simpletoc_box_style_enabled', false ); | |
| 250 | + $legacy_box_style_enabled = ! empty( $attributes['box_style'] ); | |
| 251 | + $typography_enabled = ! empty( $attributes['fontSize'] ) || ! empty( $attributes['style']['typography'] ); | |
| 252 | + $wrapper_classes = array( 'simpletoc' ); | |
| 253 | + $wrapper_style = ''; | |
| 82 | 254 | |
| 83 | -function render_callback( $attributes ) | |
| 84 | -{ | |
| 255 | + if ( $typography_enabled ) { | |
| 256 | + $wrapper_classes[] = 'has-simpletoc-typography'; | |
| 257 | + } | |
| 85 | 258 | |
| 86 | - $is_backend = defined('REST_REQUEST') && true === REST_REQUEST && 'edit' === filter_input(INPUT_GET, 'context'); | |
| 259 | + if ( $global_box_style_enabled || $legacy_box_style_enabled ) { | |
| 260 | + $wrapper_classes[] = 'is-style-boxed'; | |
| 261 | + $wrapper_classes[] = 'has-simpletoc-box-style'; | |
| 87 | 262 | |
| 88 | - $alignclass = ''; | |
| 89 | - if ( isset ($attributes['align']) ) { | |
| 90 | - $align = $attributes['align']; | |
| 91 | - $alignclass = 'align' . $align; | |
| 92 | - } | |
| 263 | + if ( $global_box_style_enabled ) { | |
| 264 | + $wrapper_classes[] = 'has-background'; | |
| 265 | + $wrapper_style = safecss_filter_attr( 'background-color:' . DEFAULT_BOX_COLOR . ';' ); | |
| 266 | + } elseif ( ! empty( $attributes['box_color'] ) ) { | |
| 267 | + $wrapper_classes[] = 'has-background'; | |
| 268 | + $wrapper_style = safecss_filter_attr( 'background-color:' . $attributes['box_color'] . ';' ); | |
| 269 | + } else { | |
| 270 | + $wrapper_classes[] = 'has-background'; | |
| 271 | + $wrapper_style = safecss_filter_attr( 'background-color:' . DEFAULT_BOX_COLOR . ';' ); | |
| 272 | + } | |
| 273 | + } | |
| 93 | 274 | |
| 94 | - $className = ''; | |
| 95 | - if ( isset( $attributes['className'] ) ) { | |
| 96 | - $className = strip_tags(htmlspecialchars($attributes['className'] )); | |
| 97 | - } | |
| 275 | + $wrapper_attrs = get_block_wrapper_attributes( | |
| 276 | + array( | |
| 277 | + 'class' => implode( ' ', $wrapper_classes ), | |
| 278 | + 'style' => $wrapper_style, | |
| 279 | + ) | |
| 280 | + ); | |
| 281 | + $pre_html = '<div role="navigation" aria-label="' . esc_attr__( 'Table of Contents', 'simpletoc' ) . '" ' . $wrapper_attrs . '>'; | |
| 282 | + $post_html = '</div>'; | |
| 98 | 283 | |
| 99 | - $pre_html = ''; | |
| 100 | - $post_html = ''; | |
| 101 | - if ( $className != '' ) { | |
| 102 | - $pre_html = '<div class="simpletoc ' . $className . '">'; | |
| 103 | - $post_html = '</div>'; | |
| 104 | - } | |
| 105 | - | |
| 106 | - $post = get_post(); | |
| 107 | - if ( is_null($post) || is_null($post->post_content) ) { | |
| 108 | - $blocks = ''; | |
| 109 | - } else { | |
| 110 | - $blocks = parse_blocks($post->post_content); | |
| 111 | - } | |
| 284 | + $post = get_post(); | |
| 285 | + $blocks = ! is_null( $post ) && ! is_null( $post->post_content ) ? parse_blocks( $post->post_content ) : ''; | |
| 112 | 286 | |
| 113 | - if ( empty($blocks) ) { | |
| 114 | - $html = ''; | |
| 115 | - if( $is_backend == true ) { | |
| 116 | - if ($attributes['no_title'] == false) { | |
| 117 | - $html = '<h2 class="simpletoc-title ' . $alignclass . '">' . __('Table of Contents', 'simpletoc') . '</h2>'; | |
| 118 | - } | |
| 119 | - | |
| 120 | - $html .= '<p class="components-notice is-warning ' . $alignclass . '">' . __('No blocks found.', 'simpletoc') . ' ' . __('Save or update post first.', 'simpletoc') . '</p>'; | |
| 121 | - } | |
| 122 | - return $html; | |
| 123 | - } | |
| 287 | + $headings = array_reverse( filter_headings_recursive( $blocks ) ); | |
| 288 | + $headings = simpletoc_add_pagenumber( $blocks, $headings ); | |
| 289 | + $headings_clean = array_map( 'trim', $headings ); | |
| 290 | + $toc_html = generate_toc( $headings_clean, $attributes ); | |
| 124 | 291 | |
| 125 | - $headings = array_reverse(filter_headings_recursive($blocks)); | |
| 292 | + if ( empty( $blocks ) ) { | |
| 293 | + return get_empty_blocks_message( $is_backend, $attributes, $title_level, $alignclass, $title_text, __( 'No blocks found.', 'simpletoc' ), __( 'Save or update post first.', 'simpletoc' ), $wrapper_attrs ); | |
| 294 | + } | |
| 126 | 295 | |
| 127 | - // enrich headings with pages as a data-attribute | |
| 128 | - $headings = simpletoc_add_pagenumber($blocks, $headings); | |
| 296 | + if ( empty( $headings_clean ) ) { | |
| 297 | + return get_empty_blocks_message( $is_backend, $attributes, $title_level, $alignclass, $title_text, __( 'No headings found.', 'simpletoc' ), __( 'Save or update post first.', 'simpletoc' ), $wrapper_attrs ); | |
| 298 | + } | |
| 129 | 299 | |
| 130 | - $headings_clean = array_map('trim', $headings); | |
| 300 | + if ( empty( $toc_html ) ) { | |
| 301 | + return get_empty_blocks_message( $is_backend, $attributes, $title_level, $alignclass, $title_text, __( 'No headings found.', 'simpletoc' ), __( 'Check minimal and maximum level block settings.', 'simpletoc' ), $wrapper_attrs ); | |
| 302 | + } | |
| 131 | 303 | |
| 132 | - if ( empty( $headings_clean ) ) { | |
| 133 | - $html = ''; | |
| 134 | - if( $is_backend == true ) { | |
| 304 | + return $pre_html . $toc_html . $post_html; | |
| 305 | +} | |
| 135 | 306 | |
| 136 | - if ($attributes['no_title'] == false) { | |
| 137 | - $html = '<h2 class="simpletoc-title ' . $alignclass . '">' . __('Table of Contents', 'simpletoc') . '</h2>'; | |
| 138 | - } | |
| 139 | - | |
| 140 | - $html .= '<p class="components-notice is-warning ' . $alignclass . '">' . __('No headings found.', 'simpletoc') . ' ' . __('Save or update post first.', 'simpletoc') . '</p>'; | |
| 141 | - } | |
| 142 | - return $html; | |
| 143 | - } | |
| 307 | +/** | |
| 308 | + * Generates an HTML message for empty blocks cases in the Table of Contents. | |
| 309 | + * | |
| 310 | + * @param bool $is_backend Indicates if the request is from the backend (i.e., the WordPress editor). | |
| 311 | + * @param array $attributes An array of attributes for the Table of Contents block. | |
| 312 | + * @param int $title_level The heading level for the Table of Contents title. | |
| 313 | + * @param string $alignclass The CSS class for alignment of the Table of Contents block. | |
| 314 | + * @param string $title_text The text for the Table of Contents title. | |
| 315 | + * @param string $warning_text1 The first part of the warning message to be displayed. | |
| 316 | + * @param string $warning_text2 The second part of the warning message to be displayed. | |
| 317 | + * @param string $wrapper_attrs Block wrapper attributes. | |
| 318 | + * | |
| 319 | + * @return string The HTML output for the empty blocks message. | |
| 320 | + */ | |
| 321 | +function get_empty_blocks_message( $is_backend, $attributes, $title_level, $alignclass, $title_text, $warning_text1, $warning_text2, $wrapper_attrs = '' ) { | |
| 322 | + $html = ''; | |
| 144 | 323 | |
| 145 | - $toclist = generateToc($headings_clean, $attributes); | |
| 324 | + if ( $is_backend ) { | |
| 325 | + $html .= '<div role="navigation" aria-label="' . esc_attr__( 'Table of Contents', 'simpletoc' ) . '" ' . $wrapper_attrs . '>'; | |
| 326 | + $html .= sprintf( '<h%d class="%s">%s</h%d>', $title_level, esc_attr( trim( 'simpletoc-title ' . $alignclass ) ), $title_text, $title_level ); | |
| 327 | + $html .= sprintf( '<p class="components-notice is-warning %s">%s %s</p>', esc_attr( $alignclass ), esc_html( $warning_text1 ), esc_html( $warning_text2 ) ); | |
| 328 | + $html .= '</div>'; | |
| 329 | + } | |
| 146 | 330 | |
| 147 | - if ( empty( $toclist ) ) { | |
| 148 | - $html = ''; | |
| 149 | - if( $is_backend == true ) { | |
| 331 | + return $html; | |
| 332 | +} | |
| 150 | 333 | |
| 151 | - if ($attributes['no_title'] == false) { | |
| 152 | - $html = '<h2 class="simpletoc-title ' . $alignclass . '">' . __('Table of Contents', 'simpletoc') . '</h2>'; | |
| 153 | - } | |
| 154 | - | |
| 155 | - $html .= '<p class="components-notice is-warning ' . $alignclass . '">' . __('No headings found.', 'simpletoc') . ' ' . __('Check minimal and maximum level block settings.', 'simpletoc') . '</p>'; | |
| 156 | - } | |
| 157 | - return $html; | |
| 334 | +/** | |
| 335 | + * Adds page numbers to headings in the provided blocks array. | |
| 336 | + * | |
| 337 | + * @param array $blocks The array of blocks to process. | |
| 338 | + * @param array $headings The array of headings to add page numbers to. | |
| 339 | + * @return array The modified headings array with page numbers added. | |
| 340 | + */ | |
| 341 | +function simpletoc_add_pagenumber( $blocks, $headings ) { | |
| 342 | + $pages = 1; | |
| 158 | 343 | |
| 159 | - } | |
| 344 | + if ( ! is_array( $blocks ) ) { | |
| 345 | + return $headings; | |
| 346 | + } | |
| 160 | 347 | |
| 161 | - $output = $pre_html . $toclist . $post_html; | |
| 348 | + foreach ( $blocks as $block => $inner_block ) { | |
| 349 | + // count nextpage blocks. | |
| 350 | + if ( isset( $blocks[ $block ]['blockName'] ) && 'core/nextpage' === $blocks[ $block ]['blockName'] ) { | |
| 351 | + ++$pages; | |
| 352 | + } | |
| 162 | 353 | |
| 163 | - return $output; | |
| 354 | + if ( isset( $blocks[ $block ]['blockName'] ) && 'core/heading' === $blocks[ $block ]['blockName'] ) { | |
| 355 | + // make sure its a headline. | |
| 356 | + foreach ( $headings as $heading => &$inner_heading ) { | |
| 357 | + if ( $inner_heading === $blocks[ $block ]['innerHTML'] ) { | |
| 358 | + $inner_heading = simpletoc_add_page_number_to_headline( $blocks[ $block ]['innerHTML'], $pages ); | |
| 359 | + } | |
| 360 | + } | |
| 361 | + } | |
| 362 | + } | |
| 363 | + return $headings; | |
| 164 | 364 | } |
| 165 | 365 | |
| 366 | +/** | |
| 367 | + * Return all headings with a recursive walk through all blocks. | |
| 368 | + * This includes groups and reusable block with groups within reusable blocks. | |
| 369 | + * | |
| 370 | + * @param array[] $blocks The blocks to filter headings from. | |
| 371 | + * @return array[] | |
| 372 | + */ | |
| 373 | +function filter_headings_recursive( $blocks ) { | |
| 374 | + $arr = array(); | |
| 166 | 375 | |
| 167 | -function simpletoc_add_pagenumber( $blocks, $headings ){ | |
| 168 | - $pages = 1; | |
| 376 | + if ( ! is_array( $blocks ) ) { | |
| 377 | + return $arr; | |
| 378 | + } | |
| 169 | 379 | |
| 170 | - foreach ($blocks as $block => $innerBlock) { | |
| 171 | - | |
| 172 | - // count nextpage blocks | |
| 173 | - if (isset($blocks[$block]['blockName']) && $blocks[$block]['blockName'] === 'core/nextpage' ){ | |
| 174 | - $pages++; | |
| 175 | - } | |
| 380 | + // allow developers to ignore specific blocks. | |
| 381 | + $ignored_blocks = apply_filters( 'simpletoc_excluded_blocks', array() ); | |
| 176 | 382 | |
| 177 | - if (isset($blocks[$block]['blockName']) && $blocks[$block]["blockName"] === 'core/heading') { | |
| 178 | - // make sure its a headline. | |
| 179 | - foreach ($headings as $heading => &$innerHeading){ | |
| 180 | - if($innerHeading == $blocks[$block]["innerHTML"]){ | |
| 181 | - $innerHeading = preg_replace("/(<h1|<h2|<h3|<h4|<h5|<h6)/i", '$1 data-page="' . $pages . '"', $blocks[$block]["innerHTML"]); | |
| 182 | - } | |
| 183 | - } | |
| 184 | - } | |
| 185 | - } | |
| 186 | - return $headings; | |
| 383 | + foreach ( $blocks as $inner_block ) { | |
| 384 | + if ( is_array( $inner_block ) ) { | |
| 385 | + // if block is ignored, skip. | |
| 386 | + if ( isset( $inner_block['blockName'] ) && in_array( $inner_block['blockName'], $ignored_blocks, true ) ) { | |
| 387 | + continue; | |
| 388 | + } | |
| 389 | + | |
| 390 | + if ( isset( $inner_block['attrs']['ref'] ) ) { | |
| 391 | + // search in reusable blocks. | |
| 392 | + $post = get_post( $inner_block['attrs']['ref'] ); | |
| 393 | + if ( $post ) { | |
| 394 | + $e_arr = parse_blocks( $post->post_content ); | |
| 395 | + $arr = array_merge( filter_headings_recursive( $e_arr ), $arr ); | |
| 396 | + } | |
| 397 | + } else { | |
| 398 | + // search in groups. | |
| 399 | + $arr = array_merge( filter_headings_recursive( $inner_block ), $arr ); | |
| 400 | + } | |
| 401 | + } else { | |
| 402 | + if ( isset( $blocks['blockName'] ) && ( 'core/heading' === $blocks['blockName'] ) && 'core/heading' !== $inner_block && simpletoc_is_heading_html( $inner_block ) ) { | |
| 403 | + $arr[] = $inner_block; | |
| 404 | + } | |
| 405 | + | |
| 406 | + $supported_third_party_blocks = array( | |
| 407 | + 'generateblocks/headline', /* GenerateBlocks 1.x */ | |
| 408 | + 'generateblocks/text', /* GenerateBlocks 2.0 */ | |
| 409 | + ); | |
| 410 | + | |
| 411 | + /** | |
| 412 | + * Filter to add supported third party blocks. | |
| 413 | + * | |
| 414 | + * @param array $supported_third_party_blocks The array of supported third party blocks. | |
| 415 | + * @return array The modified array of supported third party blocks. | |
| 416 | + */ | |
| 417 | + $supported_third_party_blocks = apply_filters( | |
| 418 | + 'simpletoc_supported_third_party_blocks', | |
| 419 | + $supported_third_party_blocks | |
| 420 | + ); | |
| 421 | + | |
| 422 | + if ( isset( $blocks['blockName'] ) && in_array( $blocks['blockName'], $supported_third_party_blocks, true ) && 'core/heading' !== $inner_block && simpletoc_is_heading_html( $inner_block ) ) { | |
| 423 | + $inner_block = simpletoc_maybe_replace_generateblocks_dynamic_tags( $inner_block, $blocks ); | |
| 424 | + $arr[] = $inner_block; | |
| 425 | + } | |
| 426 | + } | |
| 427 | + } | |
| 428 | + | |
| 429 | + return $arr; | |
| 187 | 430 | } |
| 188 | 431 | |
| 189 | 432 | /** |
| 190 | - * Return all headings with a recursive walk through all blocks. | |
| 191 | - * This includes groups and reusable block with groups within reusable blocks. | |
| 433 | + * Replaces GenerateBlocks dynamic tags in heading HTML before SimpleTOC uses it in the TOC. | |
| 434 | + * | |
| 435 | + * @param string $html The heading HTML. | |
| 436 | + * @param array $block The parsed block data. | |
| 437 | + * @return string The heading HTML with GenerateBlocks dynamic tags resolved when available. | |
| 192 | 438 | */ |
| 439 | +function simpletoc_maybe_replace_generateblocks_dynamic_tags( $html, $block ) { | |
| 440 | + if ( ! class_exists( '\GenerateBlocks_Register_Dynamic_Tag' ) || false === strpos( $html, '{{' ) ) { | |
| 441 | + return $html; | |
| 442 | + } | |
| 193 | 443 | |
| 194 | -function filter_headings_recursive( $blocks ) | |
| 195 | -{ | |
| 196 | - $arr = array(); | |
| 444 | + return \GenerateBlocks_Register_Dynamic_Tag::replace_tags( $html, $block, null ); | |
| 445 | +} | |
| 197 | 446 | |
| 198 | - foreach ($blocks as $block => $innerBlock) { | |
| 447 | +/** | |
| 448 | + * Gets heading HTML used for anchor generation. | |
| 449 | + * | |
| 450 | + * @param string $html The original heading HTML. | |
| 451 | + * @param array $block The parsed block data. | |
| 452 | + * @return string The heading HTML to use for anchor generation. | |
| 453 | + */ | |
| 454 | +function simpletoc_get_heading_html_for_anchor( $html, $block ) { | |
| 455 | + $heading_html = simpletoc_maybe_replace_generateblocks_dynamic_tags( $html, $block ); | |
| 199 | 456 | |
| 200 | - if (is_array($innerBlock)) { | |
| 457 | + if ( '' === trim( wp_strip_all_tags( $heading_html ) ) ) { | |
| 458 | + return $html; | |
| 459 | + } | |
| 201 | 460 | |
| 202 | - if (isset($innerBlock['attrs']['ref'])) { | |
| 203 | - // search in reusable blocks | |
| 204 | - $e_arr = parse_blocks(get_post($innerBlock['attrs']['ref'])->post_content); | |
| 205 | - $arr = array_merge(filter_headings_recursive($e_arr), $arr); | |
| 206 | - } else { | |
| 207 | - // search in groups | |
| 208 | - $arr = array_merge(filter_headings_recursive($innerBlock), $arr); | |
| 209 | - } | |
| 210 | - } else { | |
| 461 | + return $heading_html; | |
| 462 | +} | |
| 211 | 463 | |
| 212 | - if (isset($blocks['blockName']) && ( $blocks['blockName'] === 'core/heading' ) && $innerBlock !== 'core/heading') { | |
| 213 | - // make sure its a headline. | |
| 214 | - if (preg_match("/(<h1|<h2|<h3|<h4|<h5|<h6)/i", $innerBlock)) { | |
| 215 | - $arr[] = $innerBlock; | |
| 216 | - } | |
| 217 | - } | |
| 464 | +/** | |
| 465 | + * Sanitizes a string to be used as an anchor attribute in HTML by removing punctuation, non-breaking spaces, umlauts, and accents, | |
| 466 | + * and replacing whitespace and other characters with dashes. | |
| 467 | + * | |
| 468 | + * @param string $string_to_sanitize The input string to be sanitized. | |
| 469 | + * @return string The sanitized string encoded for use in a URL. | |
| 470 | + */ | |
| 471 | +function simpletoc_sanitize_string( $string_to_sanitize ) { | |
| 472 | + // remove punctuation. | |
| 473 | + $zero_punctuation = preg_replace( '/\p{P}/u', '', $string_to_sanitize ); | |
| 474 | + // remove non-breaking spaces. | |
| 475 | + $html_wo_nbs = str_replace( ' ', ' ', $zero_punctuation ); | |
| 476 | + // remove umlauts and accents. | |
| 477 | + $string_without_accents = remove_accents( $html_wo_nbs ); | |
| 478 | + // Sanitizes a title, replacing whitespace and a few other characters with dashes. | |
| 479 | + // Already returns a URL-safe, percent-encoded slug for non-ASCII input, so no | |
| 480 | + // further rawurlencode() is needed (that would double-encode the string). | |
| 481 | + return sanitize_title_with_dashes( $string_without_accents ); | |
| 482 | +} | |
| 218 | 483 | |
| 219 | - if (isset($blocks['blockName']) && ( $blocks['blockName'] === 'generateblocks/headline' ) && $innerBlock !== 'core/heading') { | |
| 220 | - // make sure its a headline. | |
| 221 | - if (preg_match("/(<h1|<h2|<h3|<h4|<h5|<h6)/i", $innerBlock)) { | |
| 222 | - $arr[] = $innerBlock; | |
| 223 | - } | |
| 224 | - } | |
| 225 | - } | |
| 226 | - } | |
| 484 | +/** | |
| 485 | + * Add additional plugin meta links to the SimpleTOC plugin page. | |
| 486 | + * | |
| 487 | + * @param array $links An array of plugin meta links. | |
| 488 | + * @param string $file The plugin file path. | |
| 489 | + * @return array The modified array of plugin meta links. | |
| 490 | + */ | |
| 491 | +function simpletoc_plugin_meta( $links, $file ) { | |
| 227 | 492 | |
| 228 | - return $arr; | |
| 229 | - | |
| 493 | + if ( false !== strpos( $file, 'simpletoc' ) ) { | |
| 494 | + $links = array_merge( $links, array( '<a href="https://wordpress.org/support/plugin/simpletoc">' . esc_html__( 'Support', 'simpletoc' ) . '</a>' ) ); | |
| 495 | + $links = array_merge( $links, array( '<a href="https://marc.tv/out/donate">' . esc_html__( 'Donate', 'simpletoc' ) . '</a>' ) ); | |
| 496 | + $links = array_merge( $links, array( '<a href="https://wordpress.org/support/plugin/simpletoc/reviews/#new-post">' . esc_html__( 'Write a review', 'simpletoc' ) . ' ⭐️⭐️⭐️⭐️⭐️</a>' ) ); | |
| 497 | + } | |
| 498 | + | |
| 499 | + return $links; | |
| 230 | 500 | } |
| 231 | 501 | |
| 232 | 502 | /** |
| 233 | - * Remove all problematic characters for toc links | |
| 503 | + * Loads the WordPress HTML Tag Processor when available. | |
| 504 | + * | |
| 505 | + * @return bool True when the HTML Tag Processor can be used. | |
| 234 | 506 | */ |
| 507 | +function simpletoc_load_html_tag_processor() { | |
| 508 | + if ( class_exists( '\WP_HTML_Tag_Processor' ) ) { | |
| 509 | + return true; | |
| 510 | + } | |
| 235 | 511 | |
| 236 | -function simpletoc_sanitize_string( $string ) | |
| 237 | -{ | |
| 238 | - // remove punctuation | |
| 239 | - $zero_punctuation = preg_replace("/\p{P}/u", "", $string); | |
| 240 | - // remove non-breaking spaces | |
| 241 | - $html_wo_nbs = str_replace(" ", " ", $zero_punctuation); | |
| 242 | - // remove umlauts and accents | |
| 243 | - $string_without_accents = remove_accents($html_wo_nbs); | |
| 244 | - // Sanitizes a title, replacing whitespace and a few other characters with dashes. | |
| 245 | - $sanitized_string = sanitize_title_with_dashes($string_without_accents); | |
| 246 | - // Encode for use in an url | |
| 247 | - $urlencoded = urlencode($sanitized_string); | |
| 248 | - return $urlencoded; | |
| 512 | + if ( defined( 'ABSPATH' ) && defined( 'WPINC' ) ) { | |
| 513 | + $html_tag_processor_file = ABSPATH . WPINC . '/html-api/class-wp-html-tag-processor.php'; | |
| 514 | + | |
| 515 | + if ( file_exists( $html_tag_processor_file ) ) { | |
| 516 | + require_once $html_tag_processor_file; | |
| 517 | + } | |
| 518 | + } | |
| 519 | + | |
| 520 | + return class_exists( '\WP_HTML_Tag_Processor' ); | |
| 249 | 521 | } |
| 250 | 522 | |
| 251 | -function simpletoc_plugin_meta( $links, $file ) | |
| 252 | -{ | |
| 523 | +/** | |
| 524 | + * Creates an HTML Tag Processor for a valid HTML fragment. | |
| 525 | + * | |
| 526 | + * Parsed block content can contain non-string placeholders for nested blocks. | |
| 527 | + * The WordPress HTML API accepts strings only. | |
| 528 | + * | |
| 529 | + * @param mixed $html The HTML fragment to inspect. | |
| 530 | + * @return \WP_HTML_Tag_Processor|null The processor, or null when unavailable or invalid. | |
| 531 | + */ | |
| 532 | +function simpletoc_get_html_tag_processor( $html ) { | |
| 533 | + if ( ! is_string( $html ) || ! simpletoc_load_html_tag_processor() ) { | |
| 534 | + return null; | |
| 535 | + } | |
| 253 | 536 | |
| 254 | - if (false !== strpos($file, 'simpletoc')) { | |
| 255 | - $links = array_merge($links, array('<a href="https://wordpress.org/support/plugin/simpletoc">' . __('Support', 'simpletoc') . '</a>')); | |
| 256 | - $links = array_merge($links, array('<a href="https://marc.tv/out/donate">' . __('Donate', 'simpletoc') . '</a>')); | |
| 257 | - $links = array_merge($links, array('<a href="https://wordpress.org/support/plugin/simpletoc/reviews/#new-post">' . __('Write a review', 'simpletoc') . ' ⭐️⭐️⭐️⭐️⭐️</a>')); | |
| 258 | - } | |
| 537 | + return new \WP_HTML_Tag_Processor( $html ); | |
| 538 | +} | |
| 259 | 539 | |
| 260 | - return $links; | |
| 540 | +/** | |
| 541 | + * Returns true when the provided HTML contains a heading tag. | |
| 542 | + * | |
| 543 | + * @param string $html The HTML to inspect. | |
| 544 | + * @return bool True when the HTML contains a heading tag. | |
| 545 | + */ | |
| 546 | +function simpletoc_is_heading_html( $html ) { | |
| 547 | + return false !== simpletoc_get_heading_depth( $html ); | |
| 261 | 548 | } |
| 262 | 549 | |
| 263 | -function addAnchorAttribute( $html ) | |
| 264 | -{ | |
| 550 | +/** | |
| 551 | + * Gets the first heading depth from an HTML fragment. | |
| 552 | + * | |
| 553 | + * @param string $html The HTML to inspect. | |
| 554 | + * @return int|false The heading depth, or false when no heading was found. | |
| 555 | + */ | |
| 556 | +function simpletoc_get_heading_depth( $html ) { | |
| 557 | + $processor = simpletoc_get_html_tag_processor( $html ); | |
| 265 | 558 | |
| 266 | - // remove non-breaking space entites from input HTML | |
| 267 | - $html_wo_nbs = str_replace(" ", " ", $html); | |
| 559 | + if ( $processor ) { | |
| 268 | 560 | |
| 269 | - // Thank you Nick Diego | |
| 270 | - if (!$html_wo_nbs) { | |
| 271 | - return $html; | |
| 272 | - } | |
| 561 | + while ( $processor->next_tag() ) { | |
| 562 | + $tag_name = $processor->get_tag(); | |
| 273 | 563 | |
| 274 | - libxml_use_internal_errors(TRUE); | |
| 275 | - $dom = new \DOMDocument(); | |
| 276 | - @$dom->loadHTML($html_wo_nbs, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD); | |
| 564 | + if ( in_array( $tag_name, array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { | |
| 565 | + return (int) substr( $tag_name, 1 ); | |
| 566 | + } | |
| 567 | + } | |
| 568 | + } | |
| 277 | 569 | |
| 278 | - // use xpath to select the Heading html tags. | |
| 279 | - $xpath = new \DOMXPath($dom); | |
| 280 | - $tags = $xpath->evaluate("//*[self::h1 or self::h2 or self::h3 or self::h4 or self::h5 or self::h6]"); | |
| 570 | + return false; | |
| 571 | +} | |
| 281 | 572 | |
| 282 | - // Loop through all the found tags | |
| 283 | - foreach ($tags as $tag) { | |
| 284 | - // if tag already has an attribute "id" defined, no need for creating a new one | |
| 285 | - if (!empty($tag->getAttribute('id'))) {continue;} | |
| 286 | - // Set id attribute | |
| 287 | - $heading_text = strip_tags($html); | |
| 288 | - $anchor = simpletoc_sanitize_string($heading_text); | |
| 289 | - $tag->setAttribute("id", $anchor); | |
| 290 | - } | |
| 573 | +/** | |
| 574 | + * Adds a data-page attribute to the first heading in an HTML fragment. | |
| 575 | + * | |
| 576 | + * @param string $html The heading HTML. | |
| 577 | + * @param int $page_number The page number to set. | |
| 578 | + * @return string The updated HTML. | |
| 579 | + */ | |
| 580 | +function simpletoc_add_page_number_to_headline( $html, $page_number ) { | |
| 581 | + $processor = simpletoc_get_html_tag_processor( $html ); | |
| 291 | 582 | |
| 292 | - // Save the HTML changes | |
| 293 | - $content = utf8_decode($dom->saveHTML($dom->documentElement)); | |
| 583 | + if ( $processor ) { | |
| 294 | 584 | |
| 295 | - return $content; | |
| 585 | + while ( $processor->next_tag() ) { | |
| 586 | + if ( ! in_array( $processor->get_tag(), array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { | |
| 587 | + continue; | |
| 588 | + } | |
| 589 | + | |
| 590 | + $processor->set_attribute( 'data-page', (string) $page_number ); | |
| 591 | + return $processor->get_updated_html(); | |
| 592 | + } | |
| 593 | + } | |
| 594 | + | |
| 595 | + return $html; | |
| 296 | 596 | } |
| 297 | 597 | |
| 298 | -function generateToc( $headings, $attributes ) | |
| 299 | -{ | |
| 598 | +/** | |
| 599 | + * Checks whether the first heading in an HTML fragment has the provided class. | |
| 600 | + * | |
| 601 | + * @param string $html The heading HTML. | |
| 602 | + * @param string $class_name The class name to find. | |
| 603 | + * @return bool True when the class exists. | |
| 604 | + */ | |
| 605 | +function simpletoc_heading_has_class( $html, $class_name ) { | |
| 606 | + $processor = simpletoc_get_html_tag_processor( $html ); | |
| 300 | 607 | |
| 301 | - $list = ''; | |
| 302 | - $html = ''; | |
| 303 | - $min_depth = 6; | |
| 304 | - $listtype = 'ul'; | |
| 305 | - $absolute_url = ''; | |
| 306 | - $inital_depth = 6; | |
| 307 | - $link_class = ''; | |
| 308 | - $styles = ''; | |
| 608 | + if ( $processor ) { | |
| 309 | 609 | |
| 310 | - $alignclass = ''; | |
| 311 | - if ( isset ($attributes['align']) ) { | |
| 312 | - $align = $attributes['align']; | |
| 313 | - $alignclass = 'align' . $align; | |
| 314 | - } | |
| 610 | + while ( $processor->next_tag() ) { | |
| 611 | + if ( ! in_array( $processor->get_tag(), array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { | |
| 612 | + continue; | |
| 613 | + } | |
| 315 | 614 | |
| 316 | - if ($attributes['remove_indent'] == true) { | |
| 317 | - $styles = 'style="padding-left:0;list-style:none;"'; | |
| 318 | - } | |
| 319 | - | |
| 320 | - if ($attributes['add_smooth'] == true) { | |
| 321 | - $link_class = 'class="smooth-scroll"'; | |
| 322 | - } | |
| 615 | + $class_attribute = $processor->get_attribute( 'class' ); | |
| 323 | 616 | |
| 324 | - if ($attributes['use_ol'] == true) { | |
| 325 | - $listtype = 'ol'; | |
| 326 | - } | |
| 617 | + if ( ! is_string( $class_attribute ) ) { | |
| 618 | + return false; | |
| 619 | + } | |
| 327 | 620 | |
| 328 | - if ($attributes['use_absolute_urls'] == true) { | |
| 329 | - $absolute_url = get_permalink(); | |
| 330 | - } | |
| 621 | + return in_array( $class_name, preg_split( '/\s+/', trim( $class_attribute ) ), true ); | |
| 622 | + } | |
| 623 | + } | |
| 331 | 624 | |
| 332 | - foreach ($headings as $line => $headline) { | |
| 333 | - if ($min_depth > $headings[$line][2]) { | |
| 334 | - // search for lowest level | |
| 335 | - $min_depth = (int) $headings[$line][2]; | |
| 336 | - $inital_depth = $min_depth; | |
| 337 | - } | |
| 338 | - } | |
| 625 | + return false; | |
| 626 | +} | |
| 339 | 627 | |
| 340 | - /* If there is a custom min level, make sure it is the baseline. */ | |
| 341 | - if ($attributes['min_level'] > $min_depth) { | |
| 342 | - $min_depth = $attributes['min_level']; | |
| 343 | - } | |
| 628 | +/** | |
| 629 | + * Adds an ID attribute to all Heading tags in the provided HTML. | |
| 630 | + * | |
| 631 | + * @param string $html The HTML content to modify. | |
| 632 | + * @param SimpleTOC_Headline_Ids $headline_class_instance The instance of the SimpleTOC_Headline_Ids class. | |
| 633 | + * @param array $block The parsed block data. | |
| 634 | + * @return string The modified HTML content with ID attributes added to the Heading tags | |
| 635 | + */ | |
| 636 | +function add_anchor_attribute( $html, $headline_class_instance = null, $block = array() ) { | |
| 637 | + if ( ! is_string( $html ) ) { | |
| 638 | + return $html; | |
| 639 | + } | |
| 344 | 640 | |
| 345 | - $itemcount = 0; | |
| 641 | + // remove non-breaking space entites from input HTML. | |
| 642 | + $html_wo_nbs = str_replace( ' ', ' ', $html ); | |
| 346 | 643 | |
| 347 | - foreach ($headings as $line => $headline) { | |
| 644 | + // Thank you Nick Diego. | |
| 645 | + if ( ! $html_wo_nbs ) { | |
| 646 | + return $html; | |
| 647 | + } | |
| 348 | 648 | |
| 349 | - $title = strip_tags($headline); | |
| 350 | - $page = ''; | |
| 351 | - $dom = new \DOMDocument(); | |
| 352 | - @$dom->loadHTML($headline, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD); | |
| 353 | - $xpath = new \DOMXPath($dom); | |
| 354 | - $nodes = $xpath->query('//*/@data-page'); | |
| 649 | + $processor = simpletoc_get_html_tag_processor( $html_wo_nbs ); | |
| 355 | 650 | |
| 356 | - if ( isset($nodes[0] ) && $nodes[0]->nodeValue > 1) { | |
| 357 | - $page = $nodes[0]->nodeValue . '/'; | |
| 358 | - $absolute_url = get_permalink(); | |
| 359 | - } | |
| 651 | + if ( $processor ) { | |
| 360 | 652 | |
| 361 | - $link = simpletoc_sanitize_string($title); | |
| 362 | - if (isset($nodes[0]) && !empty($nodes[0]->ownerElement->getAttribute('id'))) { | |
| 363 | - // if the node already has an attribute id, use that as anchor | |
| 364 | - $link = $nodes[0]->ownerElement->getAttribute('id'); | |
| 365 | - } | |
| 653 | + while ( $processor->next_tag() ) { | |
| 654 | + if ( ! in_array( $processor->get_tag(), array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { | |
| 655 | + continue; | |
| 656 | + } | |
| 366 | 657 | |
| 367 | - $this_depth = (int) $headings[$line][2]; | |
| 368 | - if (isset($headings[$line + 1][2])) { | |
| 369 | - $next_depth = (int) $headings[$line + 1][2]; | |
| 370 | - } else { | |
| 371 | - $next_depth = ''; | |
| 372 | - } | |
| 658 | + // If tag already has an attribute "id" defined, no need for creating a new one. | |
| 659 | + if ( ! empty( $processor->get_attribute( 'id' ) ) ) { | |
| 660 | + continue; | |
| 661 | + } | |
| 373 | 662 | |
| 374 | - // skip this heading because a max depth is set. | |
| 375 | - if ($this_depth > $attributes['max_level'] or strpos($headline, 'class="simpletoc-hidden') > 0) { | |
| 376 | - goto closelist; | |
| 377 | - } | |
| 663 | + $heading_html = simpletoc_get_heading_html_for_anchor( $html, $block ); | |
| 664 | + $heading_text = trim( wp_strip_all_tags( $heading_html ) ); | |
| 665 | + $anchor = $headline_class_instance->get_headline_anchor( $heading_text ); | |
| 666 | + $processor->set_attribute( 'id', $anchor ); | |
| 667 | + } | |
| 378 | 668 | |
| 379 | - // skip this heading because a min depth is set. | |
| 380 | - if( $this_depth < $attributes['min_level'] ){ | |
| 381 | - continue; | |
| 382 | - } | |
| 669 | + return $processor->get_updated_html(); | |
| 670 | + } | |
| 383 | 671 | |
| 384 | - $itemcount++; | |
| 672 | + return $html; | |
| 673 | +} | |
| 385 | 674 | |
| 386 | - // start list | |
| 387 | - if ($this_depth == $min_depth) { | |
| 388 | - $list .= "<li>\n"; | |
| 389 | - } else { | |
| 390 | - // we are not as base level. Start opening levels until base is reached. | |
| 391 | - for ($min_depth; $min_depth < $this_depth; $min_depth++) { | |
| 392 | - $list .= "\n\t\t<" . $listtype . "><li>\n"; | |
| 393 | - } | |
| 394 | - } | |
| 395 | - | |
| 396 | - $list .= "<a " . $link_class . " href=\"" . $absolute_url . esc_html($page) . "#" . $link . "\">" . $title . "</a>"; | |
| 675 | +/** | |
| 676 | + * Generates a table of contents based on the provided headings and attributes | |
| 677 | + * | |
| 678 | + * @param array $headings An array of headings to include in the table of contents. | |
| 679 | + * @param array $attributes An array of attributes to customize the output. | |
| 680 | + * @return string The generated table of contents as HTML | |
| 681 | + */ | |
| 682 | +function generate_toc( $headings, $attributes ) { | |
| 683 | + $list = ''; | |
| 684 | + $html = ''; | |
| 685 | + $min_depth = 6; | |
| 686 | + $initial_depth = 6; | |
| 687 | + $align_class = isset( $attributes['align'] ) ? 'align' . $attributes['align'] : ''; | |
| 688 | + $styles = $attributes['remove_indent'] ? 'style="padding-left:0;list-style:none;"' : ''; | |
| 689 | + $list_type = $attributes['use_ol'] ? 'ol' : 'ul'; | |
| 690 | + $global_absolut_urls_enabled = get_option( 'simpletoc_absolute_urls_enabled', false ); | |
| 691 | + $absolute_url = $attributes['use_absolute_urls'] || $global_absolut_urls_enabled ? get_permalink() : ''; | |
| 397 | 692 | |
| 398 | - closelist: | |
| 399 | - // close lists | |
| 400 | - // check if this is not the last heading | |
| 401 | - if ($line != count($headings) - 1) { | |
| 402 | - // do we need to close the door behind us? | |
| 403 | - if ($min_depth > $next_depth) { | |
| 404 | - // If yes, how many times? | |
| 405 | - for ($min_depth; $min_depth > $next_depth; $min_depth--) { | |
| 406 | - $list .= "</li></" . $listtype . ">\n"; | |
| 407 | - } | |
| 408 | - } | |
| 409 | - if ($min_depth == $next_depth) { | |
| 410 | - $list .= "</li>"; | |
| 411 | - } | |
| 412 | - // last heading | |
| 413 | - } else { | |
| 414 | - for ($inital_depth; $inital_depth < $this_depth; $inital_depth++) { | |
| 415 | - $list .= "</li></" . $listtype . ">\n"; | |
| 416 | - } | |
| 417 | - } | |
| 418 | - } | |
| 693 | + $toc_headings = get_included_toc_headings( $headings, $attributes ); | |
| 694 | + list($min_depth, $initial_depth) = find_min_depth( $toc_headings, $attributes ); | |
| 419 | 695 | |
| 420 | - if ($attributes['no_title'] == false) { | |
| 421 | - $html = "<h2 class=\"simpletoc-title\">" . __("Table of Contents", "simpletoc") . "</h2>"; | |
| 422 | - } | |
| 423 | - $html .= "<" . $listtype . " class=\"simpletoc-list\" " . $styles ." " . $alignclass .">\n" . $list . "</li></" . $listtype . ">"; | |
| 696 | + $item_count = count( $toc_headings ); | |
| 697 | + $list = render_toc_list_items( $toc_headings, $list_type, $absolute_url, $min_depth ); | |
| 424 | 698 | |
| 425 | - if($itemcount < 1) { | |
| 426 | - $html = ''; | |
| 427 | - } | |
| 699 | + $html = add_accordion_start( $html, $attributes, $item_count, $align_class ); | |
| 700 | + $html = add_hidden_markup_start( $html, $attributes, $item_count, $align_class ); | |
| 701 | + $html = add_smooth( $html, $attributes ); | |
| 428 | 702 | |
| 429 | - return $html; | |
| 703 | + // Add the table of contents list to the output if the list is not empty. | |
| 704 | + if ( ! empty( $list ) ) { | |
| 705 | + $html_class = 'simpletoc-list'; | |
| 706 | + if ( ! empty( $align_class ) ) { | |
| 707 | + $html_class .= " $align_class"; | |
| 708 | + } | |
| 709 | + | |
| 710 | + $html_style = ''; | |
| 711 | + if ( ! empty( $styles ) ) { | |
| 712 | + $html_style = " $styles"; | |
| 713 | + } | |
| 714 | + | |
| 715 | + $html .= "<$list_type class=\"$html_class\"$html_style>\n$list</$list_type>"; | |
| 716 | + } | |
| 717 | + | |
| 718 | + $html = add_accordion_end( $html, $attributes ); | |
| 719 | + $html = add_hidden_markup_end( $html, $attributes ); | |
| 720 | + | |
| 721 | + // return an emtpy string if stripped result is empty. | |
| 722 | + if ( empty( trim( wp_strip_all_tags( $html ) ) ) ) { | |
| 723 | + $html = ''; | |
| 724 | + } | |
| 725 | + | |
| 726 | + return $html; | |
| 727 | +} | |
| 728 | + | |
| 729 | +/** | |
| 730 | + * Finds the minimum depth level of headings in the provided array and adjusts it based on the provided attributes | |
| 731 | + * | |
| 732 | + * @param array $headings An array of headings to search through. | |
| 733 | + * @param array $attributes An array of attributes to adjust the minimum depth level. | |
| 734 | + * @return array An array containing the minimum depth level and the initial depth level. | |
| 735 | + */ | |
| 736 | +function find_min_depth( $headings, $attributes ) { | |
| 737 | + $min_depth = 6; | |
| 738 | + $initial_depth = 6; | |
| 739 | + | |
| 740 | + foreach ( $headings as $line => $headline ) { | |
| 741 | + $this_depth = is_array( $headline ) && isset( $headline['depth'] ) ? (int) $headline['depth'] : (int) $headings[ $line ][2]; | |
| 742 | + if ( $min_depth > $this_depth ) { | |
| 743 | + $min_depth = $this_depth; | |
| 744 | + $initial_depth = $min_depth; | |
| 745 | + } | |
| 746 | + } | |
| 747 | + | |
| 748 | + if ( $attributes['min_level'] > $min_depth ) { | |
| 749 | + $min_depth = $attributes['min_level']; | |
| 750 | + $initial_depth = $min_depth; | |
| 751 | + } | |
| 752 | + | |
| 753 | + return array( $min_depth, $initial_depth ); | |
| 754 | +} | |
| 755 | + | |
| 756 | +/** | |
| 757 | + * Determines if a given headline should be excluded based on the provided attributes. | |
| 758 | + * | |
| 759 | + * @param string $headline The headline to check for exclusion. | |
| 760 | + * @param array $attributes An array of attributes to use for exclusion. | |
| 761 | + * @param int $this_depth The depth level of the headline. | |
| 762 | + * @return bool True if the headline should be excluded, false otherwise. | |
| 763 | + */ | |
| 764 | +function should_exclude_headline( $headline, $attributes, $this_depth ) { | |
| 765 | + $exclude_headline = simpletoc_heading_has_class( $headline, 'simpletoc-hidden' ); | |
| 766 | + | |
| 767 | + return ( $this_depth > $attributes['max_level'] || $exclude_headline || $this_depth < $attributes['min_level'] ); | |
| 768 | +} | |
| 769 | + | |
| 770 | +/** | |
| 771 | + * Filters headings down to TOC-visible entries while preserving anchor generation order. | |
| 772 | + * | |
| 773 | + * @param array $headings An array of headings to include in the table of contents. | |
| 774 | + * @param array $attributes An array of attributes to customize the output. | |
| 775 | + * @return array[] The headings that should be rendered in the table of contents. | |
| 776 | + */ | |
| 777 | +function get_included_toc_headings( $headings, $attributes ) { | |
| 778 | + $toc_headings = array(); | |
| 779 | + $headline_ids = new SimpleTOC_Headline_Ids(); | |
| 780 | + | |
| 781 | + foreach ( $headings as $headline ) { | |
| 782 | + $this_depth = simpletoc_get_heading_depth( $headline ); | |
| 783 | + | |
| 784 | + if ( false === $this_depth ) { | |
| 785 | + continue; | |
| 786 | + } | |
| 787 | + | |
| 788 | + $title = trim( wp_strip_all_tags( $headline ) ); | |
| 789 | + $custom_id = extract_id( $headline ); | |
| 790 | + $link = $custom_id ? $custom_id : $headline_ids->get_headline_anchor( $title ); | |
| 791 | + | |
| 792 | + if ( should_exclude_headline( $headline, $attributes, $this_depth ) ) { | |
| 793 | + continue; | |
| 794 | + } | |
| 795 | + | |
| 796 | + $toc_headings[] = array( | |
| 797 | + 'headline' => $headline, | |
| 798 | + 'depth' => $this_depth, | |
| 799 | + 'title' => $title, | |
| 800 | + 'link' => $link, | |
| 801 | + ); | |
| 802 | + } | |
| 803 | + | |
| 804 | + return $toc_headings; | |
| 805 | +} | |
| 806 | + | |
| 807 | +/** | |
| 808 | + * Renders nested TOC list item markup from already-filtered headings. | |
| 809 | + * | |
| 810 | + * @param array[] $toc_headings The headings that should be rendered in the table of contents. | |
| 811 | + * @param string $list_type The type of list to be created, either "ul" (unordered list) or "ol". | |
| 812 | + * @param string $absolute_url The optional absolute URL prefix for links. | |
| 813 | + * @param int $min_depth The minimum heading depth included in the table of contents. | |
| 814 | + * @return string The rendered nested list item markup. | |
| 815 | + */ | |
| 816 | +function render_toc_list_items( $toc_headings, $list_type, $absolute_url, $min_depth ) { | |
| 817 | + $list = ''; | |
| 818 | + $current_depth = null; | |
| 819 | + | |
| 820 | + foreach ( $toc_headings as $toc_heading ) { | |
| 821 | + $this_depth = $toc_heading['depth']; | |
| 822 | + | |
| 823 | + if ( null === $current_depth ) { | |
| 824 | + $current_depth = $this_depth; | |
| 825 | + $list .= '<li>'; | |
| 826 | + } elseif ( $this_depth > $current_depth ) { | |
| 827 | + for ( $current_depth; $current_depth < $this_depth; $current_depth++ ) { | |
| 828 | + $list .= "\n<" . $list_type . ">\n<li>"; | |
| 829 | + } | |
| 830 | + } elseif ( $this_depth === $current_depth ) { | |
| 831 | + $list .= "</li>\n<li>"; | |
| 832 | + } else { | |
| 833 | + for ( $current_depth; $current_depth > $this_depth; $current_depth-- ) { | |
| 834 | + $list .= "</li>\n</" . $list_type . ">\n"; | |
| 835 | + } | |
| 836 | + $list .= "</li>\n<li>"; | |
| 837 | + } | |
| 838 | + | |
| 839 | + $page = get_page_number_from_headline( $toc_heading['headline'] ); | |
| 840 | + $url = $absolute_url . $page . '#' . $toc_heading['link']; | |
| 841 | + $href = $absolute_url ? esc_url( $url ) : esc_attr( $url ); | |
| 842 | + $list .= '<a href="' . $href . '">' . esc_html( $toc_heading['title'] ) . '</a>' . PHP_EOL; | |
| 843 | + } | |
| 844 | + | |
| 845 | + if ( null !== $current_depth ) { | |
| 846 | + for ( $current_depth; $current_depth > $min_depth; $current_depth-- ) { | |
| 847 | + $list .= "</li>\n</" . $list_type . ">\n"; | |
| 848 | + } | |
| 849 | + $list .= '</li>'; | |
| 850 | + } | |
| 851 | + | |
| 852 | + return $list; | |
| 853 | +} | |
| 854 | + | |
| 855 | +/** | |
| 856 | + * Adds smooth scrolling styles to the output HTML, if enabled by global option or block attribute. | |
| 857 | + * | |
| 858 | + * @param string $html The HTML string to which the styles will be added. | |
| 859 | + * @param array $attributes An array of block attributes. | |
| 860 | + * @return string The modified HTML string with the added smooth scrolling styles. | |
| 861 | + */ | |
| 862 | +function add_smooth( $html, $attributes ) { | |
| 863 | + // Add smooth scrolling styles, if enabled by global option or block attribute. | |
| 864 | + $is_smooth_enabled = $attributes['add_smooth'] || true === (bool) get_option( 'simpletoc_smooth_enabled', false ); | |
| 865 | + $html .= $is_smooth_enabled ? '<style>html { scroll-behavior: smooth; }</style>' : ''; | |
| 866 | + | |
| 867 | + return $html; | |
| 868 | +} | |
| 869 | + | |
| 870 | +/** | |
| 871 | + * Enqueues the necessary CSS and JS files for the accordion functionality on the frontend. | |
| 872 | + */ | |
| 873 | +function enqueue_accordion_frontend() { | |
| 874 | + wp_enqueue_script( | |
| 875 | + 'simpletoc-accordion', | |
| 876 | + plugin_dir_url( __FILE__ ) . 'assets/accordion.js', | |
| 877 | + array(), | |
| 878 | + SIMPLETOC_VERSION, | |
| 879 | + true | |
| 880 | + ); | |
| 881 | + | |
| 882 | + wp_enqueue_style( | |
| 883 | + 'simpletoc-accordion', | |
| 884 | + plugin_dir_url( __FILE__ ) . 'assets/accordion.css', | |
| 885 | + array(), | |
| 886 | + SIMPLETOC_VERSION | |
| 887 | + ); | |
| 888 | +} | |
| 889 | + | |
| 890 | +/** | |
| 891 | + * Adds the opening HTML tag(s) for the hidden markup element and the table of contents title, if applicable. | |
| 892 | + * | |
| 893 | + * @param string $html The HTML string to add the opening tag(s) to. | |
| 894 | + * @param array $attributes The attributes of the table of contents block. | |
| 895 | + * @param int $itemcount The number of items in the table of contents. | |
| 896 | + * @param string $alignclass The alignment class for the table of contents block. | |
| 897 | + */ | |
| 898 | +function add_hidden_markup_start( $html, $attributes, $itemcount, $alignclass ) { // phpcs:ignore. | |
| 899 | + $is_hidden_enabled = $attributes['hidden']; | |
| 900 | + | |
| 901 | + if ( $is_hidden_enabled ) { | |
| 902 | + $title_text = $attributes['title_text'] ? esc_html( trim( $attributes['title_text'] ) ) : esc_html__( 'Table of Contents', 'simpletoc' ); | |
| 903 | + $hidden_start = '<details class="simpletoc"> | |
| 904 | + <summary>' . $title_text . '</summary>'; | |
| 905 | + $html .= $hidden_start; | |
| 906 | + } | |
| 907 | + | |
| 908 | + // If there are no items in the table of contents, return an empty string. | |
| 909 | + if ( $itemcount < 1 ) { | |
| 910 | + return ''; | |
| 911 | + } | |
| 912 | + | |
| 913 | + return $html; | |
| 914 | +} | |
| 915 | + | |
| 916 | +/** | |
| 917 | + * Adds the closing HTML tag(s) for the hidden markup element if the hidden markup is enabled. | |
| 918 | + * | |
| 919 | + * @param string $html The HTML string to add the closing tag(s) to. | |
| 920 | + * @param array $attributes The attributes of the table of contents block. | |
| 921 | + * @return string The modified HTML string with the closing tag(s) added. | |
| 922 | + */ | |
| 923 | +function add_hidden_markup_end( $html, $attributes ) { | |
| 924 | + $is_hidden_enabled = $attributes['hidden']; | |
| 925 | + | |
| 926 | + if ( $is_hidden_enabled ) { | |
| 927 | + $html .= '</details>'; | |
| 928 | + } | |
| 929 | + | |
| 930 | + return $html; | |
| 931 | +} | |
| 932 | + | |
| 933 | +/** | |
| 934 | + * Adds the opening HTML tag(s) for the accordion element and the table of contents title, if applicable. | |
| 935 | + * | |
| 936 | + * @param string $html The HTML string to add the opening tag(s) to. | |
| 937 | + * @param array $attributes The attributes of the table of contents block. | |
| 938 | + * @param int $itemcount The number of items in the table of contents. | |
| 939 | + * @param string $alignclass The alignment class for the table of contents block. | |
| 940 | + */ | |
| 941 | +function add_accordion_start( $html, $attributes, $itemcount, $alignclass ) { | |
| 942 | + // Check if accordion is enabled either through the function arguments or the options. | |
| 943 | + $is_accordion_enabled = $attributes['accordion'] || true === (bool) get_option( 'simpletoc_accordion_enabled', false ); | |
| 944 | + $is_hidden_enabled = $attributes['hidden']; | |
| 945 | + $title_text = $attributes['title_text'] ? esc_html( trim( $attributes['title_text'] ) ) : esc_html__( 'Table of Contents', 'simpletoc' ); | |
| 946 | + | |
| 947 | + // Start and end HTML for accordion, if enabled. | |
| 948 | + $accordion_start = ''; | |
| 949 | + if ( $is_accordion_enabled ) { | |
| 950 | + enqueue_accordion_frontend(); | |
| 951 | + $accordion_start = '<h2 class="simpletoc-accordion-heading"><button type="button" aria-expanded="false" aria-controls="simpletoc-content-container" class="simpletoc-collapsible">' . $title_text . '<span class="simpletoc-icon" aria-hidden="true"></span></button></h2><div id="simpletoc-content-container" class="simpletoc-content">'; | |
| 952 | + } | |
| 953 | + | |
| 954 | + // Add the accordion start HTML to the output. | |
| 955 | + $html .= $accordion_start; | |
| 956 | + | |
| 957 | + // Add the table of contents title, if not hidden and not in accordion mode. | |
| 958 | + $show_title = ! $attributes['no_title'] && ! $is_accordion_enabled && ! $is_hidden_enabled; | |
| 959 | + if ( $show_title ) { | |
| 960 | + $title_tag = $attributes['title_level'] > 0 ? "h{$attributes['title_level']}" : 'p'; | |
| 961 | + $title_tag = wp_strip_all_tags( $title_tag ); | |
| 962 | + $html_class = 'simpletoc-title'; | |
| 963 | + | |
| 964 | + if ( ! empty( $alignclass ) ) { | |
| 965 | + $html_class .= " $alignclass"; | |
| 966 | + } | |
| 967 | + | |
| 968 | + $html = "<$title_tag class=\"$html_class\">$title_text</$title_tag>\n"; | |
| 969 | + } | |
| 970 | + | |
| 971 | + // If there are no items in the table of contents, return an empty string. | |
| 972 | + if ( $itemcount < 1 ) { | |
| 973 | + return ''; | |
| 974 | + } | |
| 975 | + | |
| 976 | + return $html; | |
| 977 | +} | |
| 978 | + | |
| 979 | +/** | |
| 980 | + * Adds the closing HTML tag(s) for the accordion element if the accordion is enabled. | |
| 981 | + * | |
| 982 | + * @param string $html The HTML string to add the closing tag(s) to. | |
| 983 | + * @param array $attributes The attributes of the table of contents block. | |
| 984 | + * @return string The modified HTML string with the closing tag(s) added | |
| 985 | + */ | |
| 986 | +function add_accordion_end( $html, $attributes ) { | |
| 987 | + // Check if accordion is enabled either through the function arguments or the options. | |
| 988 | + $is_accordion_enabled = $attributes['accordion'] || true === (bool) get_option( 'simpletoc_accordion_enabled', false ); | |
| 989 | + | |
| 990 | + if ( $is_accordion_enabled ) { | |
| 991 | + $html .= '</div>'; | |
| 992 | + } | |
| 993 | + | |
| 994 | + return $html; | |
| 995 | +} | |
| 996 | + | |
| 997 | +/** | |
| 998 | + * Extracts the ID value from the provided heading HTML string. | |
| 999 | + * | |
| 1000 | + * @param string $headline The heading HTML string to extract the ID value from. | |
| 1001 | + * @return string|false Returns the extracted ID value, or false if no ID value is found. | |
| 1002 | + */ | |
| 1003 | +function extract_id( $headline ) { | |
| 1004 | + $processor = simpletoc_get_html_tag_processor( $headline ); | |
| 1005 | + | |
| 1006 | + if ( $processor ) { | |
| 1007 | + | |
| 1008 | + while ( $processor->next_tag() ) { | |
| 1009 | + if ( ! in_array( $processor->get_tag(), array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { | |
| 1010 | + continue; | |
| 1011 | + } | |
| 1012 | + | |
| 1013 | + $id_value = $processor->get_attribute( 'id' ); | |
| 1014 | + | |
| 1015 | + if ( is_string( $id_value ) ) { | |
| 1016 | + return $id_value; | |
| 1017 | + } | |
| 1018 | + } | |
| 1019 | + } | |
| 1020 | + | |
| 1021 | + return false; | |
| 1022 | +} | |
| 1023 | + | |
| 1024 | +/** | |
| 1025 | + * Gets the page number from a headline string. | |
| 1026 | + * | |
| 1027 | + * @param string $headline The headline string. | |
| 1028 | + * @return string The page number (in the format "X/") if it exists and is greater than 1, or an empty string otherwise. | |
| 1029 | + */ | |
| 1030 | +function get_page_number_from_headline( $headline ) { | |
| 1031 | + $processor = simpletoc_get_html_tag_processor( $headline ); | |
| 1032 | + | |
| 1033 | + if ( $processor ) { | |
| 1034 | + | |
| 1035 | + while ( $processor->next_tag() ) { | |
| 1036 | + if ( ! in_array( $processor->get_tag(), array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { | |
| 1037 | + continue; | |
| 1038 | + } | |
| 1039 | + | |
| 1040 | + $page_number = (int) $processor->get_attribute( 'data-page' ); | |
| 1041 | + | |
| 1042 | + if ( $page_number > 1 ) { | |
| 1043 | + return esc_html( $page_number . '/' ); | |
| 1044 | + } | |
| 1045 | + } | |
| 1046 | + | |
| 1047 | + return ''; | |
| 1048 | + } | |
| 1049 | + | |
| 1050 | + return ''; | |
| 430 | 1051 | } |
