| 1 |
<?php |
| 2 |
/** |
| 3 |
* Plugin Name: SimpleTOC - Table of Contents Block |
| 4 |
* Plugin URI: https://marc.tv/simpletoc-wordpress-inhaltsverzeichnis-plugin-gutenberg/ |
| 5 |
* Description: SEO-friendly Table of Contents Gutenberg block. No JavaScript or CSS by default. |
| 6 |
* Version: 7.2.0 |
| 7 |
* Requires at least: 6.2 |
| 8 |
* Requires PHP: 7.3 |
| 9 |
* Author: Marc Tönsing |
| 10 |
* Author URI: https://toensing.com |
| 11 |
* Text Domain: simpletoc |
| 12 |
* License: GPL v2 or later |
| 13 |
* License URI: http://www.gnu.org/licenses/gpl-2.0.html |
| 14 |
* |
| 15 |
* @package simpletoc |
| 16 |
*/ |
| 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 = '7.2.0'; |
| 25 |
|
| 26 |
/** |
| 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 |
} |
| 35 |
|
| 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() { |
| 43 |
|
| 44 |
if ( function_exists( 'wp_set_script_translations' ) ) { |
| 45 |
wp_set_script_translations( 'simpletoc-toc-editor-script', 'simpletoc' ); |
| 46 |
} |
| 47 |
|
| 48 |
add_filter( 'plugin_row_meta', __NAMESPACE__ . '\simpletoc_plugin_meta', 10, 2 ); |
| 49 |
|
| 50 |
register_block_type( |
| 51 |
__DIR__ . '/build', |
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array( |
| 53 |
'render_callback' => __NAMESPACE__ . '\render_callback_simpletoc', |
| 54 |
) |
| 55 |
); |
| 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 |
); |
| 66 |
} |
| 67 |
|
| 68 |
add_action( 'init', __NAMESPACE__ . '\register_simpletoc_block' ); |
| 69 |
|
| 70 |
/** |
| 71 |
* Adds SimpleTOC-specific block editor settings. |
| 72 |
* |
| 73 |
* @param array $editor_settings Default editor settings. |
| 74 |
* @param \WP_Block_Editor_Context $editor_context Editor context. |
| 75 |
* |
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* @return array |
| 77 |
*/ |
| 78 |
function add_simpletoc_block_editor_settings( $editor_settings, $editor_context ) { |
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$editor_settings['simpletocSettingsUrl'] = admin_url( 'options-general.php?page=simpletoc' ); |
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|
| 81 |
return $editor_settings; |
| 82 |
} |
| 83 |
|
| 84 |
add_filter( 'block_editor_settings_all', __NAMESPACE__ . '\add_simpletoc_block_editor_settings', 10, 2 ); |
| 85 |
|
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/** |
| 87 |
* Inject potentially missing translations into the block-editor i18n |
| 88 |
* collection. |
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* |
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* This keeps the plugin backwards compatible, in case the user did not |
| 91 |
* update translations on their website (yet). |
| 92 |
* |
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* @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 ) { |
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// List of translations that we inject into the block-editor JS. |
| 105 |
$dynamic_translations = array( |
| 106 |
'Table of Contents' => __( 'Table of Contents', 'simpletoc' ), |
| 107 |
); |
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|
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$changed = false; |
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$obj = json_decode( $translations, true ); |
| 111 |
|
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// Confirm that the translation JSON is valid. |
| 113 |
if ( isset( $obj['locale_data'] ) && isset( $obj['locale_data']['messages'] ) ) { |
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$messages = $obj['locale_data']['messages']; |
| 115 |
|
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// Inject dynamic translations, when needed. |
| 117 |
foreach ( $dynamic_translations as $key => $locale ) { |
| 118 |
if ( 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] |
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) { |
| 123 |
$messages[ $key ] = array( $locale ); |
| 124 |
$changed = true; |
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} |
| 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 |
} |
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} |
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} |
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|
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return $translations; |
| 137 |
}, |
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10, |
| 139 |
4 |
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); |
| 141 |
|
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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 |
| 146 |
* filter inserts relevant translations i |
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* |
| 148 |
* @param array $settings Array of determined settings for registering a block type. |
| 149 |
* @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( |
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'block_type_metadata_settings', |
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function ( $settings, $metadata ) { |
| 156 |
if ( 'simpletoc/toc' === $metadata['name'] ) { |
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$settings['attributes']['title_text']['default'] = __( 'Table of Contents', 'simpletoc' ); |
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} |
| 159 |
|
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return $settings; |
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}, |
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10, |
| 163 |
2 |
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); |
| 165 |
|
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/** |
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* Filter to add plugins to the TOC list for Rank Math plugin. |
| 168 |
* |
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* @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; |
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} |
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); |
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|
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|
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|
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/** |
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* Adds IDs to the headings of the provided post content using a recursive block structure. |
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* |
| 184 |
* @param string $content The content to add IDs to. |
| 185 |
* @return string The content with IDs added to its headings |
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*/ |
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function simpletoc_add_ids_to_content( $content ) { |
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|
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$blocks = parse_blocks( $content ); |
| 190 |
|
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$blocks = add_ids_to_blocks_recursive( $blocks ); |
| 192 |
|
| 193 |
$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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add_filter( 'the_content', __NAMESPACE__ . '\simpletoc_add_ids_to_content', 1 ); |
| 199 |
|
| 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 ) { |
| 207 |
|
| 208 |
$supported_blocks = array( |
| 209 |
'core/heading', |
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'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; |
| 236 |
} |
| 237 |
|
| 238 |
/** |
| 239 |
* Renders a Table of Contents block for a post |
| 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 |
| 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 |
$box_style_enabled = $global_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 = ''; |
| 254 |
|
| 255 |
if ( $typography_enabled ) { |
| 256 |
$wrapper_classes[] = 'has-simpletoc-typography'; |
| 257 |
} |
| 258 |
|
| 259 |
if ( $box_style_enabled ) { |
| 260 |
$wrapper_classes[] = 'has-simpletoc-box-style'; |
| 261 |
|
| 262 |
if ( $global_box_style_enabled ) { |
| 263 |
$wrapper_classes[] = 'has-background'; |
| 264 |
$wrapper_style = safecss_filter_attr( 'background-color:' . DEFAULT_BOX_COLOR . ';' ); |
| 265 |
} elseif ( ! empty( $attributes['box_color'] ) ) { |
| 266 |
$wrapper_classes[] = 'has-background'; |
| 267 |
$wrapper_style = safecss_filter_attr( 'background-color:' . $attributes['box_color'] . ';' ); |
| 268 |
} else { |
| 269 |
$wrapper_classes[] = 'has-background'; |
| 270 |
$wrapper_style = safecss_filter_attr( 'background-color:' . DEFAULT_BOX_COLOR . ';' ); |
| 271 |
} |
| 272 |
} |
| 273 |
|
| 274 |
$wrapper_attrs = get_block_wrapper_attributes( |
| 275 |
array( |
| 276 |
'class' => implode( ' ', $wrapper_classes ), |
| 277 |
'style' => $wrapper_style, |
| 278 |
) |
| 279 |
); |
| 280 |
$pre_html = '<div role="navigation" aria-label="' . esc_attr__( 'Table of Contents', 'simpletoc' ) . '" ' . $wrapper_attrs . '>'; |
| 281 |
$post_html = '</div>'; |
| 282 |
|
| 283 |
$post = get_post(); |
| 284 |
$blocks = ! is_null( $post ) && ! is_null( $post->post_content ) ? parse_blocks( $post->post_content ) : ''; |
| 285 |
|
| 286 |
$headings = array_reverse( filter_headings_recursive( $blocks ) ); |
| 287 |
$headings = simpletoc_add_pagenumber( $blocks, $headings ); |
| 288 |
$headings_clean = array_map( 'trim', $headings ); |
| 289 |
$toc_html = generate_toc( $headings_clean, $attributes ); |
| 290 |
|
| 291 |
if ( empty( $blocks ) ) { |
| 292 |
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 ); |
| 293 |
} |
| 294 |
|
| 295 |
if ( empty( $headings_clean ) ) { |
| 296 |
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 ); |
| 297 |
} |
| 298 |
|
| 299 |
if ( empty( $toc_html ) ) { |
| 300 |
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 ); |
| 301 |
} |
| 302 |
|
| 303 |
return $pre_html . $toc_html . $post_html; |
| 304 |
} |
| 305 |
|
| 306 |
/** |
| 307 |
* Generates an HTML message for empty blocks cases in the Table of Contents. |
| 308 |
* |
| 309 |
* @param bool $is_backend Indicates if the request is from the backend (i.e., the WordPress editor). |
| 310 |
* @param array $attributes An array of attributes for the Table of Contents block. |
| 311 |
* @param int $title_level The heading level for the Table of Contents title. |
| 312 |
* @param string $alignclass The CSS class for alignment of the Table of Contents block. |
| 313 |
* @param string $title_text The text for the Table of Contents title. |
| 314 |
* @param string $warning_text1 The first part of the warning message to be displayed. |
| 315 |
* @param string $warning_text2 The second part of the warning message to be displayed. |
| 316 |
* @param string $wrapper_attrs Block wrapper attributes. |
| 317 |
* |
| 318 |
* @return string The HTML output for the empty blocks message. |
| 319 |
*/ |
| 320 |
function get_empty_blocks_message( $is_backend, $attributes, $title_level, $alignclass, $title_text, $warning_text1, $warning_text2, $wrapper_attrs = '' ) { |
| 321 |
$html = ''; |
| 322 |
|
| 323 |
if ( $is_backend ) { |
| 324 |
$html .= '<div role="navigation" aria-label="' . esc_attr__( 'Table of Contents', 'simpletoc' ) . '" ' . $wrapper_attrs . '>'; |
| 325 |
$html .= sprintf( '<h%d class="%s">%s</h%d>', $title_level, esc_attr( trim( 'simpletoc-title ' . $alignclass ) ), $title_text, $title_level ); |
| 326 |
$html .= sprintf( '<p class="components-notice is-warning %s">%s %s</p>', esc_attr( $alignclass ), esc_html( $warning_text1 ), esc_html( $warning_text2 ) ); |
| 327 |
$html .= '</div>'; |
| 328 |
} |
| 329 |
|
| 330 |
return $html; |
| 331 |
} |
| 332 |
|
| 333 |
/** |
| 334 |
* Adds page numbers to headings in the provided blocks array. |
| 335 |
* |
| 336 |
* @param array $blocks The array of blocks to process. |
| 337 |
* @param array $headings The array of headings to add page numbers to. |
| 338 |
* @return array The modified headings array with page numbers added. |
| 339 |
*/ |
| 340 |
function simpletoc_add_pagenumber( $blocks, $headings ) { |
| 341 |
$pages = 1; |
| 342 |
|
| 343 |
if ( ! is_array( $blocks ) ) { |
| 344 |
return $headings; |
| 345 |
} |
| 346 |
|
| 347 |
foreach ( $blocks as $block => $inner_block ) { |
| 348 |
// count nextpage blocks. |
| 349 |
if ( isset( $blocks[ $block ]['blockName'] ) && 'core/nextpage' === $blocks[ $block ]['blockName'] ) { |
| 350 |
++$pages; |
| 351 |
} |
| 352 |
|
| 353 |
if ( isset( $blocks[ $block ]['blockName'] ) && 'core/heading' === $blocks[ $block ]['blockName'] ) { |
| 354 |
// make sure its a headline. |
| 355 |
foreach ( $headings as $heading => &$inner_heading ) { |
| 356 |
if ( $inner_heading === $blocks[ $block ]['innerHTML'] ) { |
| 357 |
$inner_heading = simpletoc_add_page_number_to_headline( $blocks[ $block ]['innerHTML'], $pages ); |
| 358 |
} |
| 359 |
} |
| 360 |
} |
| 361 |
} |
| 362 |
return $headings; |
| 363 |
} |
| 364 |
|
| 365 |
/** |
| 366 |
* Return all headings with a recursive walk through all blocks. |
| 367 |
* This includes groups and reusable block with groups within reusable blocks. |
| 368 |
* |
| 369 |
* @param array[] $blocks The blocks to filter headings from. |
| 370 |
* @return array[] |
| 371 |
*/ |
| 372 |
function filter_headings_recursive( $blocks ) { |
| 373 |
$arr = array(); |
| 374 |
|
| 375 |
if ( ! is_array( $blocks ) ) { |
| 376 |
return $arr; |
| 377 |
} |
| 378 |
|
| 379 |
// allow developers to ignore specific blocks. |
| 380 |
$ignored_blocks = apply_filters( 'simpletoc_excluded_blocks', array() ); |
| 381 |
|
| 382 |
foreach ( $blocks as $inner_block ) { |
| 383 |
if ( is_array( $inner_block ) ) { |
| 384 |
// if block is ignored, skip. |
| 385 |
if ( isset( $inner_block['blockName'] ) && in_array( $inner_block['blockName'], $ignored_blocks, true ) ) { |
| 386 |
continue; |
| 387 |
} |
| 388 |
|
| 389 |
if ( isset( $inner_block['attrs']['ref'] ) ) { |
| 390 |
// search in reusable blocks. |
| 391 |
$post = get_post( $inner_block['attrs']['ref'] ); |
| 392 |
if ( $post ) { |
| 393 |
$e_arr = parse_blocks( $post->post_content ); |
| 394 |
$arr = array_merge( filter_headings_recursive( $e_arr ), $arr ); |
| 395 |
} |
| 396 |
} else { |
| 397 |
// search in groups. |
| 398 |
$arr = array_merge( filter_headings_recursive( $inner_block ), $arr ); |
| 399 |
} |
| 400 |
} else { |
| 401 |
if ( isset( $blocks['blockName'] ) && ( 'core/heading' === $blocks['blockName'] ) && 'core/heading' !== $inner_block && simpletoc_is_heading_html( $inner_block ) ) { |
| 402 |
$arr[] = $inner_block; |
| 403 |
} |
| 404 |
|
| 405 |
$supported_third_party_blocks = array( |
| 406 |
'generateblocks/headline', /* GenerateBlocks 1.x */ |
| 407 |
'generateblocks/text', /* GenerateBlocks 2.0 */ |
| 408 |
); |
| 409 |
|
| 410 |
/** |
| 411 |
* Filter to add supported third party blocks. |
| 412 |
* |
| 413 |
* @param array $supported_third_party_blocks The array of supported third party blocks. |
| 414 |
* @return array The modified array of supported third party blocks. |
| 415 |
*/ |
| 416 |
$supported_third_party_blocks = apply_filters( |
| 417 |
'simpletoc_supported_third_party_blocks', |
| 418 |
$supported_third_party_blocks |
| 419 |
); |
| 420 |
|
| 421 |
if ( isset( $blocks['blockName'] ) && in_array( $blocks['blockName'], $supported_third_party_blocks, true ) && 'core/heading' !== $inner_block && simpletoc_is_heading_html( $inner_block ) ) { |
| 422 |
$inner_block = simpletoc_maybe_replace_generateblocks_dynamic_tags( $inner_block, $blocks ); |
| 423 |
$arr[] = $inner_block; |
| 424 |
} |
| 425 |
} |
| 426 |
} |
| 427 |
|
| 428 |
return $arr; |
| 429 |
} |
| 430 |
|
| 431 |
/** |
| 432 |
* Replaces GenerateBlocks dynamic tags in heading HTML before SimpleTOC uses it in the TOC. |
| 433 |
* |
| 434 |
* @param string $html The heading HTML. |
| 435 |
* @param array $block The parsed block data. |
| 436 |
* @return string The heading HTML with GenerateBlocks dynamic tags resolved when available. |
| 437 |
*/ |
| 438 |
function simpletoc_maybe_replace_generateblocks_dynamic_tags( $html, $block ) { |
| 439 |
if ( ! class_exists( '\GenerateBlocks_Register_Dynamic_Tag' ) || false === strpos( $html, '{{' ) ) { |
| 440 |
return $html; |
| 441 |
} |
| 442 |
|
| 443 |
return \GenerateBlocks_Register_Dynamic_Tag::replace_tags( $html, $block, null ); |
| 444 |
} |
| 445 |
|
| 446 |
/** |
| 447 |
* Gets heading HTML used for anchor generation. |
| 448 |
* |
| 449 |
* @param string $html The original heading HTML. |
| 450 |
* @param array $block The parsed block data. |
| 451 |
* @return string The heading HTML to use for anchor generation. |
| 452 |
*/ |
| 453 |
function simpletoc_get_heading_html_for_anchor( $html, $block ) { |
| 454 |
$heading_html = simpletoc_maybe_replace_generateblocks_dynamic_tags( $html, $block ); |
| 455 |
|
| 456 |
if ( '' === trim( wp_strip_all_tags( $heading_html ) ) ) { |
| 457 |
return $html; |
| 458 |
} |
| 459 |
|
| 460 |
return $heading_html; |
| 461 |
} |
| 462 |
|
| 463 |
/** |
| 464 |
* Sanitizes a string to be used as an anchor attribute in HTML by removing punctuation, non-breaking spaces, umlauts, and accents, |
| 465 |
* and replacing whitespace and other characters with dashes. |
| 466 |
* |
| 467 |
* @param string $string_to_sanitize The input string to be sanitized. |
| 468 |
* @return string The sanitized string encoded for use in a URL. |
| 469 |
*/ |
| 470 |
function simpletoc_sanitize_string( $string_to_sanitize ) { |
| 471 |
// remove punctuation. |
| 472 |
$zero_punctuation = preg_replace( '/\p{P}/u', '', $string_to_sanitize ); |
| 473 |
// remove non-breaking spaces. |
| 474 |
$html_wo_nbs = str_replace( ' ', ' ', $zero_punctuation ); |
| 475 |
// remove umlauts and accents. |
| 476 |
$string_without_accents = remove_accents( $html_wo_nbs ); |
| 477 |
// Sanitizes a title, replacing whitespace and a few other characters with dashes. |
| 478 |
$sanitized_string = sanitize_title_with_dashes( $string_without_accents ); |
| 479 |
// Encode for use in an url. |
| 480 |
$urlencoded = rawurlencode( $sanitized_string ); |
| 481 |
return $urlencoded; |
| 482 |
} |
| 483 |
|
| 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 ) { |
| 492 |
|
| 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; |
| 500 |
} |
| 501 |
|
| 502 |
/** |
| 503 |
* Loads the WordPress HTML Tag Processor when available. |
| 504 |
* |
| 505 |
* @return bool True when the HTML Tag Processor can be used. |
| 506 |
*/ |
| 507 |
function simpletoc_load_html_tag_processor() { |
| 508 |
if ( class_exists( '\WP_HTML_Tag_Processor' ) ) { |
| 509 |
return true; |
| 510 |
} |
| 511 |
|
| 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' ); |
| 521 |
} |
| 522 |
|
| 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 |
} |
| 536 |
|
| 537 |
return new \WP_HTML_Tag_Processor( $html ); |
| 538 |
} |
| 539 |
|
| 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 ); |
| 548 |
} |
| 549 |
|
| 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 ); |
| 558 |
|
| 559 |
if ( $processor ) { |
| 560 |
|
| 561 |
while ( $processor->next_tag() ) { |
| 562 |
$tag_name = $processor->get_tag(); |
| 563 |
|
| 564 |
if ( in_array( $tag_name, array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { |
| 565 |
return (int) substr( $tag_name, 1 ); |
| 566 |
} |
| 567 |
} |
| 568 |
} |
| 569 |
|
| 570 |
return false; |
| 571 |
} |
| 572 |
|
| 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 ); |
| 582 |
|
| 583 |
if ( $processor ) { |
| 584 |
|
| 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; |
| 596 |
} |
| 597 |
|
| 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 ); |
| 607 |
|
| 608 |
if ( $processor ) { |
| 609 |
|
| 610 |
while ( $processor->next_tag() ) { |
| 611 |
if ( ! in_array( $processor->get_tag(), array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { |
| 612 |
continue; |
| 613 |
} |
| 614 |
|
| 615 |
$class_attribute = $processor->get_attribute( 'class' ); |
| 616 |
|
| 617 |
if ( ! is_string( $class_attribute ) ) { |
| 618 |
return false; |
| 619 |
} |
| 620 |
|
| 621 |
return in_array( $class_name, preg_split( '/\s+/', trim( $class_attribute ) ), true ); |
| 622 |
} |
| 623 |
} |
| 624 |
|
| 625 |
return false; |
| 626 |
} |
| 627 |
|
| 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 |
} |
| 640 |
|
| 641 |
// remove non-breaking space entites from input HTML. |
| 642 |
$html_wo_nbs = str_replace( ' ', ' ', $html ); |
| 643 |
|
| 644 |
// Thank you Nick Diego. |
| 645 |
if ( ! $html_wo_nbs ) { |
| 646 |
return $html; |
| 647 |
} |
| 648 |
|
| 649 |
$processor = simpletoc_get_html_tag_processor( $html_wo_nbs ); |
| 650 |
|
| 651 |
if ( $processor ) { |
| 652 |
|
| 653 |
while ( $processor->next_tag() ) { |
| 654 |
if ( ! in_array( $processor->get_tag(), array( 'H1', 'H2', 'H3', 'H4', 'H5', 'H6' ), true ) ) { |
| 655 |
continue; |
| 656 |
} |
| 657 |
|
| 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 |
} |
| 662 |
|
| 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 |
} |
| 668 |
|
| 669 |
return $processor->get_updated_html(); |
| 670 |
} |
| 671 |
|
| 672 |
return $html; |
| 673 |
} |
| 674 |
|
| 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() : ''; |
| 692 |
|
| 693 |
$toc_headings = get_included_toc_headings( $headings, $attributes ); |
| 694 |
list($min_depth, $initial_depth) = find_min_depth( $toc_headings, $attributes ); |
| 695 |
|
| 696 |
$item_count = count( $toc_headings ); |
| 697 |
$list = render_toc_list_items( $toc_headings, $list_type, $absolute_url, $min_depth ); |
| 698 |
|
| 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 ); |
| 702 |
|
| 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 ''; |
| 1051 |
} |
| 1052 |
|
