| @@ -1,0 +1,1873 @@ | ||
| 1 | +<?php | |
| 2 | +/** | |
| 3 | + * Markdown Extra - A text-to-HTML conversion tool for web writers | |
| 4 | + * | |
| 5 | + * @package php-markdown | |
| 6 | + * @author Michel Fortin <michel.fortin@michelf.com> | |
| 7 | + * @copyright 2004-2022 Michel Fortin <https://michelf.com/projects/php-markdown/> | |
| 8 | + * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/> | |
| 9 | + */ | |
| 10 | + | |
| 11 | +namespace Michelf; | |
| 12 | + | |
| 13 | +/** | |
| 14 | + * Markdown Extra Parser Class | |
| 15 | + */ | |
| 16 | +class MarkdownExtra extends \Michelf\Markdown { | |
| 17 | + /** | |
| 18 | + * Configuration variables | |
| 19 | + */ | |
| 20 | + /** | |
| 21 | + * Prefix for footnote ids. | |
| 22 | + */ | |
| 23 | + public string $fn_id_prefix = ""; | |
| 24 | + | |
| 25 | + /** | |
| 26 | + * Optional title attribute for footnote links. | |
| 27 | + */ | |
| 28 | + public string $fn_link_title = ""; | |
| 29 | + | |
| 30 | + /** | |
| 31 | + * Optional class attribute for footnote links and backlinks. | |
| 32 | + */ | |
| 33 | + public string $fn_link_class = "footnote-ref"; | |
| 34 | + public string $fn_backlink_class = "footnote-backref"; | |
| 35 | + | |
| 36 | + /** | |
| 37 | + * Content to be displayed within footnote backlinks. The default is '↩'; | |
| 38 | + * the U+FE0E on the end is a Unicode variant selector used to prevent iOS | |
| 39 | + * from displaying the arrow character as an emoji. | |
| 40 | + * Optionally use '^^' and '%%' to refer to the footnote number and | |
| 41 | + * reference number respectively. {@see parseFootnotePlaceholders()} | |
| 42 | + */ | |
| 43 | + public string $fn_backlink_html = '↩︎'; | |
| 44 | + | |
| 45 | + /** | |
| 46 | + * Optional title and aria-label attributes for footnote backlinks for | |
| 47 | + * added accessibility (to ensure backlink uniqueness). | |
| 48 | + * Use '^^' and '%%' to refer to the footnote number and reference number | |
| 49 | + * respectively. {@see parseFootnotePlaceholders()} | |
| 50 | + */ | |
| 51 | + public string $fn_backlink_title = ""; | |
| 52 | + public string $fn_backlink_label = ""; | |
| 53 | + | |
| 54 | + /** | |
| 55 | + * Class name for table cell alignment (%% replaced left/center/right) | |
| 56 | + * For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center' | |
| 57 | + * If empty, the align attribute is used instead of a class name. | |
| 58 | + */ | |
| 59 | + public string $table_align_class_tmpl = ''; | |
| 60 | + | |
| 61 | + /** | |
| 62 | + * Optional class prefix for fenced code block. | |
| 63 | + */ | |
| 64 | + public string $code_class_prefix = ""; | |
| 65 | + | |
| 66 | + /** | |
| 67 | + * Class attribute for code blocks goes on the `code` tag; | |
| 68 | + * setting this to true will put attributes on the `pre` tag instead. | |
| 69 | + */ | |
| 70 | + public bool $code_attr_on_pre = false; | |
| 71 | + | |
| 72 | + /** | |
| 73 | + * Predefined abbreviations. | |
| 74 | + */ | |
| 75 | + public array $predef_abbr = array(); | |
| 76 | + | |
| 77 | + /** | |
| 78 | + * Only convert atx-style headers if there's a space between the header and # | |
| 79 | + */ | |
| 80 | + public bool $hashtag_protection = false; | |
| 81 | + | |
| 82 | + /** | |
| 83 | + * Determines whether footnotes should be appended to the end of the document. | |
| 84 | + * If true, footnote html can be retrieved from $this->footnotes_assembled. | |
| 85 | + */ | |
| 86 | + public bool $omit_footnotes = false; | |
| 87 | + | |
| 88 | + | |
| 89 | + /** | |
| 90 | + * After parsing, the HTML for the list of footnotes appears here. | |
| 91 | + * This is available only if $omit_footnotes == true. | |
| 92 | + * | |
| 93 | + * Note: when placing the content of `footnotes_assembled` on the page, | |
| 94 | + * consider adding the attribute `role="doc-endnotes"` to the `div` or | |
| 95 | + * `section` that will enclose the list of footnotes so they are | |
| 96 | + * reachable to accessibility tools the same way they would be with the | |
| 97 | + * default HTML output. | |
| 98 | + */ | |
| 99 | + public ?string $footnotes_assembled = null; | |
| 100 | + | |
| 101 | + /** | |
| 102 | + * Parser implementation | |
| 103 | + */ | |
| 104 | + | |
| 105 | + /** | |
| 106 | + * Constructor function. Initialize the parser object. | |
| 107 | + * @return void | |
| 108 | + */ | |
| 109 | + public function __construct() { | |
| 110 | + // Add extra escapable characters before parent constructor | |
| 111 | + // initialize the table. | |
| 112 | + $this->escape_chars .= ':|'; | |
| 113 | + | |
| 114 | + // Insert extra document, block, and span transformations. | |
| 115 | + // Parent constructor will do the sorting. | |
| 116 | + $this->document_gamut += array( | |
| 117 | + "doFencedCodeBlocks" => 5, | |
| 118 | + "stripFootnotes" => 15, | |
| 119 | + "stripAbbreviations" => 25, | |
| 120 | + "appendFootnotes" => 50, | |
| 121 | + ); | |
| 122 | + $this->block_gamut += array( | |
| 123 | + "doFencedCodeBlocks" => 5, | |
| 124 | + "doTables" => 15, | |
| 125 | + "doDefLists" => 45, | |
| 126 | + ); | |
| 127 | + $this->span_gamut += array( | |
| 128 | + "doFootnotes" => 5, | |
| 129 | + "doAbbreviations" => 70, | |
| 130 | + ); | |
| 131 | + | |
| 132 | + $this->enhanced_ordered_list = true; | |
| 133 | + parent::__construct(); | |
| 134 | + } | |
| 135 | + | |
| 136 | + | |
| 137 | + /** | |
| 138 | + * Extra variables used during extra transformations. | |
| 139 | + */ | |
| 140 | + protected array $footnotes = array(); | |
| 141 | + protected array $footnotes_ordered = array(); | |
| 142 | + protected array $footnotes_ref_count = array(); | |
| 143 | + protected array $footnotes_numbers = array(); | |
| 144 | + protected array $abbr_desciptions = array(); | |
| 145 | + protected string $abbr_word_re = ''; | |
| 146 | + | |
| 147 | + /** | |
| 148 | + * Give the current footnote number. | |
| 149 | + */ | |
| 150 | + protected int $footnote_counter = 1; | |
| 151 | + | |
| 152 | + /** | |
| 153 | + * Ref attribute for links | |
| 154 | + */ | |
| 155 | + protected array $ref_attr = array(); | |
| 156 | + | |
| 157 | + /** | |
| 158 | + * Setting up Extra-specific variables. | |
| 159 | + */ | |
| 160 | + protected function setup() { | |
| 161 | + parent::setup(); | |
| 162 | + | |
| 163 | + $this->footnotes = array(); | |
| 164 | + $this->footnotes_ordered = array(); | |
| 165 | + $this->footnotes_ref_count = array(); | |
| 166 | + $this->footnotes_numbers = array(); | |
| 167 | + $this->abbr_desciptions = array(); | |
| 168 | + $this->abbr_word_re = ''; | |
| 169 | + $this->footnote_counter = 1; | |
| 170 | + $this->footnotes_assembled = null; | |
| 171 | + | |
| 172 | + foreach ($this->predef_abbr as $abbr_word => $abbr_desc) { | |
| 173 | + if ($this->abbr_word_re) | |
| 174 | + $this->abbr_word_re .= '|'; | |
| 175 | + $this->abbr_word_re .= preg_quote($abbr_word); | |
| 176 | + $this->abbr_desciptions[$abbr_word] = trim($abbr_desc); | |
| 177 | + } | |
| 178 | + } | |
| 179 | + | |
| 180 | + /** | |
| 181 | + * Clearing Extra-specific variables. | |
| 182 | + */ | |
| 183 | + protected function teardown() { | |
| 184 | + $this->footnotes = array(); | |
| 185 | + $this->footnotes_ordered = array(); | |
| 186 | + $this->footnotes_ref_count = array(); | |
| 187 | + $this->footnotes_numbers = array(); | |
| 188 | + $this->abbr_desciptions = array(); | |
| 189 | + $this->abbr_word_re = ''; | |
| 190 | + | |
| 191 | + if ( ! $this->omit_footnotes ) | |
| 192 | + $this->footnotes_assembled = null; | |
| 193 | + | |
| 194 | + parent::teardown(); | |
| 195 | + } | |
| 196 | + | |
| 197 | + | |
| 198 | + /** | |
| 199 | + * Extra attribute parser | |
| 200 | + */ | |
| 201 | + /** | |
| 202 | + * Expression to use to catch attributes (includes the braces) | |
| 203 | + */ | |
| 204 | + protected string $id_class_attr_catch_re = '\{((?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}'; | |
| 205 | + | |
| 206 | + /** | |
| 207 | + * Expression to use when parsing in a context when no capture is desired | |
| 208 | + */ | |
| 209 | + protected string $id_class_attr_nocatch_re = '\{(?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}'; | |
| 210 | + | |
| 211 | + /** | |
| 212 | + * Parse attributes caught by the $this->id_class_attr_catch_re expression | |
| 213 | + * and return the HTML-formatted list of attributes. | |
| 214 | + * | |
| 215 | + * Currently supported attributes are .class and #id. | |
| 216 | + * | |
| 217 | + * In addition, this method also supports supplying a default Id value, | |
| 218 | + * which will be used to populate the id attribute in case it was not | |
| 219 | + * overridden. | |
| 220 | + * @param string $tag_name | |
| 221 | + * @param string $attr | |
| 222 | + * @param mixed $defaultIdValue | |
| 223 | + * @param array $classes | |
| 224 | + * @return string | |
| 225 | + */ | |
| 226 | + protected function doExtraAttributes($tag_name, $attr, $defaultIdValue = null, $classes = array()) { | |
| 227 | + if (empty($attr) && !$defaultIdValue && empty($classes)) { | |
| 228 | + return ""; | |
| 229 | + } | |
| 230 | + | |
| 231 | + // Split on components | |
| 232 | + preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches); | |
| 233 | + $elements = $matches[0]; | |
| 234 | + | |
| 235 | + // Handle classes and IDs (only first ID taken into account) | |
| 236 | + $attributes = array(); | |
| 237 | + $id = false; | |
| 238 | + foreach ($elements as $element) { | |
| 239 | + if ($element[0] === '.') { | |
| 240 | + $classes[] = substr($element, 1); | |
| 241 | + } else if ($element[0] === '#') { | |
| 242 | + if ($id === false) $id = substr($element, 1); | |
| 243 | + } else if (strpos($element, '=') > 0) { | |
| 244 | + $parts = explode('=', $element, 2); | |
| 245 | + $attributes[] = $parts[0] . '="' . $parts[1] . '"'; | |
| 246 | + } | |
| 247 | + } | |
| 248 | + | |
| 249 | + if ($id === false || $id === '') { | |
| 250 | + $id = $defaultIdValue; | |
| 251 | + } | |
| 252 | + | |
| 253 | + // Compose attributes as string | |
| 254 | + $attr_str = ""; | |
| 255 | + if (!empty($id)) { | |
| 256 | + $attr_str .= ' id="'.$this->encodeAttribute($id) .'"'; | |
| 257 | + } | |
| 258 | + if (!empty($classes)) { | |
| 259 | + $attr_str .= ' class="'. implode(" ", $classes) . '"'; | |
| 260 | + } | |
| 261 | + if (!$this->no_markup && !empty($attributes)) { | |
| 262 | + $attr_str .= ' '.implode(" ", $attributes); | |
| 263 | + } | |
| 264 | + return $attr_str; | |
| 265 | + } | |
| 266 | + | |
| 267 | + /** | |
| 268 | + * Strips link definitions from text, stores the URLs and titles in | |
| 269 | + * hash references. | |
| 270 | + * @param string $text | |
| 271 | + * @return string | |
| 272 | + */ | |
| 273 | + protected function stripLinkDefinitions($text) { | |
| 274 | + $less_than_tab = $this->tab_width - 1; | |
| 275 | + | |
| 276 | + // Link defs are in the form: ^[id]: url "optional title" | |
| 277 | + $text = preg_replace_callback('{ | |
| 278 | + ^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?: # id = $1 | |
| 279 | + [ ]* | |
| 280 | + \n? # maybe *one* newline | |
| 281 | + [ ]* | |
| 282 | + (?: | |
| 283 | + <(.+?)> # url = $2 | |
| 284 | + | | |
| 285 | + (\S+?) # url = $3 | |
| 286 | + ) | |
| 287 | + [ ]* | |
| 288 | + \n? # maybe one newline | |
| 289 | + [ ]* | |
| 290 | + (?: | |
| 291 | + (?<=\s) # lookbehind for whitespace | |
| 292 | + ["(] | |
| 293 | + (.*?) # title = $4 | |
| 294 | + [")] | |
| 295 | + [ ]* | |
| 296 | + )? # title is optional | |
| 297 | + (?:[ ]* '.$this->id_class_attr_catch_re.' )? # $5 = extra id & class attr | |
| 298 | + (?:\n+|\Z) | |
| 299 | + }xm', | |
| 300 | + array($this, '_stripLinkDefinitions_callback'), | |
| 301 | + $text); | |
| 302 | + return $text; | |
| 303 | + } | |
| 304 | + | |
| 305 | + /** | |
| 306 | + * Strip link definition callback | |
| 307 | + * @param array $matches | |
| 308 | + * @return string | |
| 309 | + */ | |
| 310 | + protected function _stripLinkDefinitions_callback($matches) { | |
| 311 | + $link_id = strtolower($matches[1]); | |
| 312 | + $url = $matches[2] == '' ? $matches[3] : $matches[2]; | |
| 313 | + $this->urls[$link_id] = $url; | |
| 314 | + $this->titles[$link_id] =& $matches[4]; | |
| 315 | + $this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]); | |
| 316 | + return ''; // String that will replace the block | |
| 317 | + } | |
| 318 | + | |
| 319 | + | |
| 320 | + /** | |
| 321 | + * HTML block parser | |
| 322 | + */ | |
| 323 | + /** | |
| 324 | + * Tags that are always treated as block tags | |
| 325 | + */ | |
| 326 | + protected string $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure|details|summary'; | |
| 327 | + | |
| 328 | + /** | |
| 329 | + * Tags treated as block tags only if the opening tag is alone on its line | |
| 330 | + */ | |
| 331 | + protected string $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video'; | |
| 332 | + | |
| 333 | + /** | |
| 334 | + * Tags where markdown="1" default to span mode: | |
| 335 | + */ | |
| 336 | + protected string $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address'; | |
| 337 | + | |
| 338 | + /** | |
| 339 | + * Tags which must not have their contents modified, no matter where | |
| 340 | + * they appear | |
| 341 | + */ | |
| 342 | + protected string $clean_tags_re = 'script|style|math|svg'; | |
| 343 | + | |
| 344 | + /** | |
| 345 | + * Tags that do not need to be closed. | |
| 346 | + */ | |
| 347 | + protected string $auto_close_tags_re = 'hr|img|param|source|track'; | |
| 348 | + | |
| 349 | + /** | |
| 350 | + * Hashify HTML Blocks and "clean tags". | |
| 351 | + * | |
| 352 | + * We only want to do this for block-level HTML tags, such as headers, | |
| 353 | + * lists, and tables. That's because we still want to wrap <p>s around | |
| 354 | + * "paragraphs" that are wrapped in non-block-level tags, such as anchors, | |
| 355 | + * phrase emphasis, and spans. The list of tags we're looking for is | |
| 356 | + * hard-coded. | |
| 357 | + * | |
| 358 | + * This works by calling _HashHTMLBlocks_InMarkdown, which then calls | |
| 359 | + * _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1" | |
| 360 | + * attribute is found within a tag, _HashHTMLBlocks_InHTML calls back | |
| 361 | + * _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag. | |
| 362 | + * These two functions are calling each other. It's recursive! | |
| 363 | + * @param string $text | |
| 364 | + * @return string | |
| 365 | + */ | |
| 366 | + protected function hashHTMLBlocks($text) { | |
| 367 | + if ($this->no_markup) { | |
| 368 | + return $text; | |
| 369 | + } | |
| 370 | + | |
| 371 | + // Call the HTML-in-Markdown hasher. | |
| 372 | + list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text); | |
| 373 | + | |
| 374 | + return $text; | |
| 375 | + } | |
| 376 | + | |
| 377 | + /** | |
| 378 | + * Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags. | |
| 379 | + * | |
| 380 | + * * $indent is the number of space to be ignored when checking for code | |
| 381 | + * blocks. This is important because if we don't take the indent into | |
| 382 | + * account, something like this (which looks right) won't work as expected: | |
| 383 | + * | |
| 384 | + * <div> | |
| 385 | + * <div markdown="1"> | |
| 386 | + * Hello World. <-- Is this a Markdown code block or text? | |
| 387 | + * </div> <-- Is this a Markdown code block or a real tag? | |
| 388 | + * <div> | |
| 389 | + * | |
| 390 | + * If you don't like this, just don't indent the tag on which | |
| 391 | + * you apply the markdown="1" attribute. | |
| 392 | + * | |
| 393 | + * * If $enclosing_tag_re is not empty, stops at the first unmatched closing | |
| 394 | + * tag with that name. Nested tags supported. | |
| 395 | + * | |
| 396 | + * * If $span is true, text inside must treated as span. So any double | |
| 397 | + * newline will be replaced by a single newline so that it does not create | |
| 398 | + * paragraphs. | |
| 399 | + * | |
| 400 | + * Returns an array of that form: ( processed text , remaining text ) | |
| 401 | + * | |
| 402 | + * @param string $text | |
| 403 | + * @param integer $indent | |
| 404 | + * @param string $enclosing_tag_re | |
| 405 | + * @param boolean $span | |
| 406 | + * @return array | |
| 407 | + */ | |
| 408 | + protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0, | |
| 409 | + $enclosing_tag_re = '', $span = false) | |
| 410 | + { | |
| 411 | + | |
| 412 | + if ($text === '') return array('', ''); | |
| 413 | + | |
| 414 | + // Regex to check for the presense of newlines around a block tag. | |
| 415 | + $newline_before_re = '/(?:^\n?|\n\n)*$/'; | |
| 416 | + $newline_after_re = | |
| 417 | + '{ | |
| 418 | + ^ # Start of text following the tag. | |
| 419 | + (?>[ ]*<!--.*?-->)? # Optional comment. | |
| 420 | + [ ]*\n # Must be followed by newline. | |
| 421 | + }xs'; | |
| 422 | + | |
| 423 | + // Regex to match any tag. | |
| 424 | + $block_tag_re = | |
| 425 | + '{ | |
| 426 | + ( # $2: Capture whole tag. | |
| 427 | + </? # Any opening or closing tag. | |
| 428 | + (?> # Tag name. | |
| 429 | + ' . $this->block_tags_re . ' | | |
| 430 | + ' . $this->context_block_tags_re . ' | | |
| 431 | + ' . $this->clean_tags_re . ' | | |
| 432 | + (?!\s)'.$enclosing_tag_re . ' | |
| 433 | + ) | |
| 434 | + (?: | |
| 435 | + (?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name. | |
| 436 | + (?> | |
| 437 | + ".*?" | # Double quotes (can contain `>`) | |
| 438 | + \'.*?\' | # Single quotes (can contain `>`) | |
| 439 | + .+? # Anything but quotes and `>`. | |
| 440 | + )*? | |
| 441 | + )? | |
| 442 | + > # End of tag. | |
| 443 | + | | |
| 444 | + <!-- .*? --> # HTML Comment | |
| 445 | + | | |
| 446 | + <\?.*?\?> | <%.*?%> # Processing instruction | |
| 447 | + | | |
| 448 | + <!\[CDATA\[.*?\]\]> # CData Block | |
| 449 | + ' . ( !$span ? ' # If not in span. | |
| 450 | + | | |
| 451 | + # Indented code block | |
| 452 | + (?: ^[ ]*\n | ^ | \n[ ]*\n ) | |
| 453 | + [ ]{' . ($indent + 4) . '}[^\n]* \n | |
| 454 | + (?> | |
| 455 | + (?: [ ]{' . ($indent + 4) . '}[^\n]* | [ ]* ) \n | |
| 456 | + )* | |
| 457 | + | | |
| 458 | + # Fenced code block marker | |
| 459 | + (?<= ^ | \n ) | |
| 460 | + [ ]{0,' . ($indent + 3) . '}(?:~{3,}|`{3,}) | |
| 461 | + [ ]* | |
| 462 | + (?: \.?[-_:a-zA-Z0-9]+ )? # standalone class name | |
| 463 | + [ ]* | |
| 464 | + (?: ' . $this->id_class_attr_nocatch_re . ' )? # extra attributes | |
| 465 | + [ ]* | |
| 466 | + (?= \n ) | |
| 467 | + ' : '' ) . ' # End (if not is span). | |
| 468 | + | | |
| 469 | + # Code span marker | |
| 470 | + # Note, this regex needs to go after backtick fenced | |
| 471 | + # code blocks but it should also be kept outside of the | |
| 472 | + # "if not in span" condition adding backticks to the parser | |
| 473 | + `+ | |
| 474 | + ) | |
| 475 | + }xs'; | |
| 476 | + | |
| 477 | + | |
| 478 | + $depth = 0; // Current depth inside the tag tree. | |
| 479 | + $parsed = ""; // Parsed text that will be returned. | |
| 480 | + | |
| 481 | + // Loop through every tag until we find the closing tag of the parent | |
| 482 | + // or loop until reaching the end of text if no parent tag specified. | |
| 483 | + do { | |
| 484 | + // Split the text using the first $tag_match pattern found. | |
| 485 | + // Text before pattern will be first in the array, text after | |
| 486 | + // pattern will be at the end, and between will be any catches made | |
| 487 | + // by the pattern. | |
| 488 | + $parts = preg_split($block_tag_re, $text, 2, | |
| 489 | + PREG_SPLIT_DELIM_CAPTURE); | |
| 490 | + | |
| 491 | + // If in Markdown span mode, add a empty-string span-level hash | |
| 492 | + // after each newline to prevent triggering any block element. | |
| 493 | + if ($span) { | |
| 494 | + $void = $this->hashPart("", ':'); | |
| 495 | + $newline = "\n$void"; | |
| 496 | + $parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void; | |
| 497 | + } | |
| 498 | + | |
| 499 | + $parsed .= $parts[0]; // Text before current tag. | |
| 500 | + | |
| 501 | + // If end of $text has been reached. Stop loop. | |
| 502 | + if (count($parts) < 3) { | |
| 503 | + $text = ""; | |
| 504 | + break; | |
| 505 | + } | |
| 506 | + | |
| 507 | + $tag = $parts[1]; // Tag to handle. | |
| 508 | + $text = $parts[2]; // Remaining text after current tag. | |
| 509 | + | |
| 510 | + // Check for: Fenced code block marker. | |
| 511 | + // Note: need to recheck the whole tag to disambiguate backtick | |
| 512 | + // fences from code spans | |
| 513 | + if (preg_match('{^\n?([ ]{0,' . ($indent + 3) . '})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+)?[ ]*(?:' . $this->id_class_attr_nocatch_re . ')?[ ]*\n?$}', $tag, $capture)) { | |
| 514 | + // Fenced code block marker: find matching end marker. | |
| 515 | + $fence_indent = strlen($capture[1]); // use captured indent in re | |
| 516 | + $fence_re = $capture[2]; // use captured fence in re | |
| 517 | + if (preg_match('{^(?>.*\n)*?[ ]{' . ($fence_indent) . '}' . $fence_re . '[ ]*(?:\n|$)}', $text, | |
| 518 | + $matches)) | |
| 519 | + { | |
| 520 | + // End marker found: pass text unchanged until marker. | |
| 521 | + $parsed .= $tag . $matches[0]; | |
| 522 | + $text = substr($text, strlen($matches[0])); | |
| 523 | + } | |
| 524 | + else { | |
| 525 | + // No end marker: just skip it. | |
| 526 | + $parsed .= $tag; | |
| 527 | + } | |
| 528 | + } | |
| 529 | + // Check for: Indented code block. | |
| 530 | + else if ($tag[0] === "\n" || $tag[0] === " ") { | |
| 531 | + // Indented code block: pass it unchanged, will be handled | |
| 532 | + // later. | |
| 533 | + $parsed .= $tag; | |
| 534 | + } | |
| 535 | + // Check for: Code span marker | |
| 536 | + // Note: need to check this after backtick fenced code blocks | |
| 537 | + else if ($tag[0] === "`") { | |
| 538 | + // Find corresponding end marker. | |
| 539 | + $tag_re = preg_quote($tag); | |
| 540 | + if (preg_match('{^(?>.+?|\n(?!\n))*?(?<!`)' . $tag_re . '(?!`)}', | |
| 541 | + $text, $matches)) | |
| 542 | + { | |
| 543 | + // End marker found: pass text unchanged until marker. | |
| 544 | + $parsed .= $tag . $matches[0]; | |
| 545 | + $text = substr($text, strlen($matches[0])); | |
| 546 | + } | |
| 547 | + else { | |
| 548 | + // Unmatched marker: just skip it. | |
| 549 | + $parsed .= $tag; | |
| 550 | + } | |
| 551 | + } | |
| 552 | + // Check for: Opening Block level tag or | |
| 553 | + // Opening Context Block tag (like ins and del) | |
| 554 | + // used as a block tag (tag is alone on it's line). | |
| 555 | + else if (preg_match('{^<(?:' . $this->block_tags_re . ')\b}', $tag) || | |
| 556 | + ( preg_match('{^<(?:' . $this->context_block_tags_re . ')\b}', $tag) && | |
| 557 | + preg_match($newline_before_re, $parsed) && | |
| 558 | + preg_match($newline_after_re, $text) ) | |
| 559 | + ) | |
| 560 | + { | |
| 561 | + // Need to parse tag and following text using the HTML parser. | |
| 562 | + list($block_text, $text) = | |
| 563 | + $this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true); | |
| 564 | + | |
| 565 | + // Make sure it stays outside of any paragraph by adding newlines. | |
| 566 | + $parsed .= "\n\n$block_text\n\n"; | |
| 567 | + } | |
| 568 | + // Check for: Clean tag (like script, math) | |
| 569 | + // HTML Comments, processing instructions. | |
| 570 | + else if (preg_match('{^<(?:' . $this->clean_tags_re . ')\b}', $tag) || | |
| 571 | + $tag[1] === '!' || $tag[1] === '?') | |
| 572 | + { | |
| 573 | + // Need to parse tag and following text using the HTML parser. | |
| 574 | + // (don't check for markdown attribute) | |
| 575 | + list($block_text, $text) = | |
| 576 | + $this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false); | |
| 577 | + | |
| 578 | + $parsed .= $block_text; | |
| 579 | + } | |
| 580 | + // Check for: Tag with same name as enclosing tag. | |
| 581 | + else if ($enclosing_tag_re !== '' && | |
| 582 | + // Same name as enclosing tag. | |
| 583 | + preg_match('{^</?(?:' . $enclosing_tag_re . ')\b}', $tag)) | |
| 584 | + { | |
| 585 | + // Increase/decrease nested tag count. | |
| 586 | + if ($tag[1] === '/') { | |
| 587 | + $depth--; | |
| 588 | + } else if ($tag[strlen($tag)-2] !== '/') { | |
| 589 | + $depth++; | |
| 590 | + } | |
| 591 | + | |
| 592 | + if ($depth < 0) { | |
| 593 | + // Going out of parent element. Clean up and break so we | |
| 594 | + // return to the calling function. | |
| 595 | + $text = $tag . $text; | |
| 596 | + break; | |
| 597 | + } | |
| 598 | + | |
| 599 | + $parsed .= $tag; | |
| 600 | + } | |
| 601 | + else { | |
| 602 | + $parsed .= $tag; | |
| 603 | + } | |
| 604 | + // @phpstan-ignore-next-line | |
| 605 | + } while ($depth >= 0); | |
| 606 | + | |
| 607 | + return array($parsed, $text); | |
| 608 | + } | |
| 609 | + | |
| 610 | + /** | |
| 611 | + * Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags. | |
| 612 | + * | |
| 613 | + * * Calls $hash_method to convert any blocks. | |
| 614 | + * * Stops when the first opening tag closes. | |
| 615 | + * * $md_attr indicate if the use of the `markdown="1"` attribute is allowed. | |
| 616 | + * (it is not inside clean tags) | |
| 617 | + * | |
| 618 | + * Returns an array of that form: ( processed text , remaining text ) | |
| 619 | + * @param string $text | |
| 620 | + * @param string $hash_method | |
| 621 | + * @param bool $md_attr Handle `markdown="1"` attribute | |
| 622 | + * @return array | |
| 623 | + */ | |
| 624 | + protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) { | |
| 625 | + if ($text === '') return array('', ''); | |
| 626 | + | |
| 627 | + // Regex to match `markdown` attribute inside of a tag. | |
| 628 | + $markdown_attr_re = ' | |
| 629 | + { | |
| 630 | + \s* # Eat whitespace before the `markdown` attribute | |
| 631 | + markdown | |
| 632 | + \s*=\s* | |
| 633 | + (?> | |
| 634 | + (["\']) # $1: quote delimiter | |
| 635 | + (.*?) # $2: attribute value | |
| 636 | + \1 # matching delimiter | |
| 637 | + | | |
| 638 | + ([^\s>]*) # $3: unquoted attribute value | |
| 639 | + ) | |
| 640 | + () # $4: make $3 always defined (avoid warnings) | |
| 641 | + }xs'; | |
| 642 | + | |
| 643 | + // Regex to match any tag. | |
| 644 | + $tag_re = '{ | |
| 645 | + ( # $2: Capture whole tag. | |
| 646 | + </? # Any opening or closing tag. | |
| 647 | + [\w:$]+ # Tag name. | |
| 648 | + (?: | |
| 649 | + (?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name. | |
| 650 | + (?> | |
| 651 | + ".*?" | # Double quotes (can contain `>`) | |
| 652 | + \'.*?\' | # Single quotes (can contain `>`) | |
| 653 | + .+? # Anything but quotes and `>`. | |
| 654 | + )*? | |
| 655 | + )? | |
| 656 | + > # End of tag. | |
| 657 | + | | |
| 658 | + <!-- .*? --> # HTML Comment | |
| 659 | + | | |
| 660 | + <\?.*?\?> | <%.*?%> # Processing instruction | |
| 661 | + | | |
| 662 | + <!\[CDATA\[.*?\]\]> # CData Block | |
| 663 | + ) | |
| 664 | + }xs'; | |
| 665 | + | |
| 666 | + $original_text = $text; // Save original text in case of faliure. | |
| 667 | + | |
| 668 | + $depth = 0; // Current depth inside the tag tree. | |
| 669 | + $block_text = ""; // Temporary text holder for current text. | |
| 670 | + $parsed = ""; // Parsed text that will be returned. | |
| 671 | + $base_tag_name_re = ''; | |
| 672 | + | |
| 673 | + // Get the name of the starting tag. | |
| 674 | + // (This pattern makes $base_tag_name_re safe without quoting.) | |
| 675 | + if (preg_match('/^<([\w:$]*)\b/', $text, $matches)) | |
| 676 | + $base_tag_name_re = $matches[1]; | |
| 677 | + | |
| 678 | + // Loop through every tag until we find the corresponding closing tag. | |
| 679 | + do { | |
| 680 | + // Split the text using the first $tag_match pattern found. | |
| 681 | + // Text before pattern will be first in the array, text after | |
| 682 | + // pattern will be at the end, and between will be any catches made | |
| 683 | + // by the pattern. | |
| 684 | + $parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE); | |
| 685 | + | |
| 686 | + if ($parts === false || count($parts) < 3) { | |
| 687 | + // End of $text reached with unbalenced tag(s). | |
| 688 | + // In that case, we return original text unchanged and pass the | |
| 689 | + // first character as filtered to prevent an infinite loop in the | |
| 690 | + // parent function. | |
| 691 | + return array($original_text[0], substr($original_text, 1)); | |
| 692 | + } | |
| 693 | + | |
| 694 | + $block_text .= $parts[0]; // Text before current tag. | |
| 695 | + $tag = $parts[1]; // Tag to handle. | |
| 696 | + $text = $parts[2]; // Remaining text after current tag. | |
| 697 | + | |
| 698 | + // Check for: Auto-close tag (like <hr/>) | |
| 699 | + // Comments and Processing Instructions. | |
| 700 | + if (preg_match('{^</?(?:' . $this->auto_close_tags_re . ')\b}', $tag) || | |
| 701 | + $tag[1] === '!' || $tag[1] === '?') | |
| 702 | + { | |
| 703 | + // Just add the tag to the block as if it was text. | |
| 704 | + $block_text .= $tag; | |
| 705 | + } | |
| 706 | + else { | |
| 707 | + // Increase/decrease nested tag count. Only do so if | |
| 708 | + // the tag's name match base tag's. | |
| 709 | + if (preg_match('{^</?' . $base_tag_name_re . '\b}', $tag)) { | |
| 710 | + if ($tag[1] === '/') { | |
| 711 | + $depth--; | |
| 712 | + } else if ($tag[strlen($tag)-2] !== '/') { | |
| 713 | + $depth++; | |
| 714 | + } | |
| 715 | + } | |
| 716 | + | |
| 717 | + // Check for `markdown="1"` attribute and handle it. | |
| 718 | + if ($md_attr && | |
| 719 | + preg_match($markdown_attr_re, $tag, $attr_m) && | |
| 720 | + preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3])) | |
| 721 | + { | |
| 722 | + // Remove `markdown` attribute from opening tag. | |
| 723 | + $tag = preg_replace($markdown_attr_re, '', $tag); | |
| 724 | + | |
| 725 | + // Check if text inside this tag must be parsed in span mode. | |
| 726 | + $mode = $attr_m[2] . $attr_m[3]; | |
| 727 | + $span_mode = $mode === 'span' || ($mode !== 'block' && | |
| 728 | + preg_match('{^<(?:' . $this->contain_span_tags_re . ')\b}', $tag)); | |
| 729 | + | |
| 730 | + // Calculate indent before tag. | |
| 731 | + if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) { | |
| 732 | + $strlen = $this->utf8_strlen; | |
| 733 | + $indent = $strlen($matches[1], 'UTF-8'); | |
| 734 | + } else { | |
| 735 | + $indent = 0; | |
| 736 | + } | |
| 737 | + | |
| 738 | + // End preceding block with this tag. | |
| 739 | + $block_text .= $tag; | |
| 740 | + $parsed .= $this->$hash_method($block_text); | |
| 741 | + | |
| 742 | + // Get enclosing tag name for the ParseMarkdown function. | |
| 743 | + // (This pattern makes $tag_name_re safe without quoting.) | |
| 744 | + preg_match('/^<([\w:$]*)\b/', $tag, $matches); | |
| 745 | + $tag_name_re = $matches[1]; | |
| 746 | + | |
| 747 | + // Parse the content using the HTML-in-Markdown parser. | |
| 748 | + list ($block_text, $text) | |
| 749 | + = $this->_hashHTMLBlocks_inMarkdown($text, $indent, | |
| 750 | + $tag_name_re, $span_mode); | |
| 751 | + | |
| 752 | + // Outdent markdown text. | |
| 753 | + if ($indent > 0) { | |
| 754 | + $block_text = preg_replace("/^[ ]{1,$indent}/m", "", | |
| 755 | + $block_text); | |
| 756 | + } | |
| 757 | + | |
| 758 | + // Append tag content to parsed text. | |
| 759 | + if (!$span_mode) { | |
| 760 | + $parsed .= "\n\n$block_text\n\n"; | |
| 761 | + } else { | |
| 762 | + $parsed .= (string) $block_text; | |
| 763 | + } | |
| 764 | + | |
| 765 | + // Start over with a new block. | |
| 766 | + $block_text = ""; | |
| 767 | + } | |
| 768 | + else $block_text .= $tag; | |
| 769 | + } | |
| 770 | + | |
| 771 | + } while ($depth > 0); | |
| 772 | + | |
| 773 | + // Hash last block text that wasn't processed inside the loop. | |
| 774 | + $parsed .= $this->$hash_method($block_text); | |
| 775 | + | |
| 776 | + return array($parsed, $text); | |
| 777 | + } | |
| 778 | + | |
| 779 | + /** | |
| 780 | + * Called whenever a tag must be hashed when a function inserts a "clean" tag | |
| 781 | + * in $text, it passes through this function and is automaticaly escaped, | |
| 782 | + * blocking invalid nested overlap. | |
| 783 | + * @param string $text | |
| 784 | + * @return string | |
| 785 | + */ | |
| 786 | + protected function hashClean($text) { | |
| 787 | + return $this->hashPart($text, 'C'); | |
| 788 | + } | |
| 789 | + | |
| 790 | + /** | |
| 791 | + * Turn Markdown link shortcuts into XHTML <a> tags. | |
| 792 | + * @param string $text | |
| 793 | + * @return string | |
| 794 | + */ | |
| 795 | + protected function doAnchors($text) { | |
| 796 | + if ($this->in_anchor) { | |
| 797 | + return $text; | |
| 798 | + } | |
| 799 | + $this->in_anchor = true; | |
| 800 | + | |
| 801 | + // First, handle reference-style links: [link text] [id] | |
| 802 | + $text = preg_replace_callback('{ | |
| 803 | + ( # wrap whole match in $1 | |
| 804 | + \[ | |
| 805 | + (' . $this->nested_brackets_re . ') # link text = $2 | |
| 806 | + \] | |
| 807 | + | |
| 808 | + [ ]? # one optional space | |
| 809 | + (?:\n[ ]*)? # one optional newline followed by spaces | |
| 810 | + | |
| 811 | + \[ | |
| 812 | + (.*?) # id = $3 | |
| 813 | + \] | |
| 814 | + ) | |
| 815 | + }xs', | |
| 816 | + array($this, '_doAnchors_reference_callback'), $text); | |
| 817 | + | |
| 818 | + // Next, inline-style links: [link text](url "optional title") | |
| 819 | + $text = preg_replace_callback('{ | |
| 820 | + ( # wrap whole match in $1 | |
| 821 | + \[ | |
| 822 | + (' . $this->nested_brackets_re . ') # link text = $2 | |
| 823 | + \] | |
| 824 | + \( # literal paren | |
| 825 | + [ \n]* | |
| 826 | + (?: | |
| 827 | + <(.+?)> # href = $3 | |
| 828 | + | | |
| 829 | + (' . $this->nested_url_parenthesis_re . ') # href = $4 | |
| 830 | + ) | |
| 831 | + [ \n]* | |
| 832 | + ( # $5 | |
| 833 | + ([\'"]) # quote char = $6 | |
| 834 | + (.*?) # Title = $7 | |
| 835 | + \6 # matching quote | |
| 836 | + [ \n]* # ignore any spaces/tabs between closing quote and ) | |
| 837 | + )? # title is optional | |
| 838 | + \) | |
| 839 | + (?:[ ]? ' . $this->id_class_attr_catch_re . ' )? # $8 = id/class attributes | |
| 840 | + ) | |
| 841 | + }xs', | |
| 842 | + array($this, '_doAnchors_inline_callback'), $text); | |
| 843 | + | |
| 844 | + // Last, handle reference-style shortcuts: [link text] | |
| 845 | + // These must come last in case you've also got [link text][1] | |
| 846 | + // or [link text](/foo) | |
| 847 | + $text = preg_replace_callback('{ | |
| 848 | + ( # wrap whole match in $1 | |
| 849 | + \[ | |
| 850 | + ([^\[\]]+) # link text = $2; can\'t contain [ or ] | |
| 851 | + \] | |
| 852 | + ) | |
| 853 | + }xs', | |
| 854 | + array($this, '_doAnchors_reference_callback'), $text); | |
| 855 | + | |
| 856 | + $this->in_anchor = false; | |
| 857 | + return $text; | |
| 858 | + } | |
| 859 | + | |
| 860 | + /** | |
| 861 | + * Callback for reference anchors | |
| 862 | + * @param array $matches | |
| 863 | + * @return string | |
| 864 | + */ | |
| 865 | + protected function _doAnchors_reference_callback($matches) { | |
| 866 | + $whole_match = $matches[1]; | |
| 867 | + $link_text = $matches[2]; | |
| 868 | + $link_id =& $matches[3]; | |
| 869 | + | |
| 870 | + if ($link_id == "") { | |
| 871 | + // for shortcut links like [this][] or [this]. | |
| 872 | + $link_id = $link_text; | |
| 873 | + } | |
| 874 | + | |
| 875 | + // lower-case and turn embedded newlines into spaces | |
| 876 | + $link_id = strtolower($link_id); | |
| 877 | + $link_id = preg_replace('{[ ]?\n}', ' ', $link_id); | |
| 878 | + | |
| 879 | + if (isset($this->urls[$link_id])) { | |
| 880 | + $url = $this->urls[$link_id]; | |
| 881 | + $url = $this->encodeURLAttribute($url); | |
| 882 | + | |
| 883 | + $result = "<a href=\"$url\""; | |
| 884 | + if ( isset( $this->titles[$link_id] ) ) { | |
| 885 | + $title = $this->titles[$link_id]; | |
| 886 | + $title = $this->encodeAttribute($title); | |
| 887 | + $result .= " title=\"$title\""; | |
| 888 | + } | |
| 889 | + if (isset($this->ref_attr[$link_id])) | |
| 890 | + $result .= $this->ref_attr[$link_id]; | |
| 891 | + | |
| 892 | + $link_text = $this->runSpanGamut($link_text); | |
| 893 | + $result .= ">$link_text</a>"; | |
| 894 | + $result = $this->hashPart($result); | |
| 895 | + } | |
| 896 | + else { | |
| 897 | + $result = $whole_match; | |
| 898 | + } | |
| 899 | + return $result; | |
| 900 | + } | |
| 901 | + | |
| 902 | + /** | |
| 903 | + * Callback for inline anchors | |
| 904 | + * @param array $matches | |
| 905 | + * @return string | |
| 906 | + */ | |
| 907 | + protected function _doAnchors_inline_callback($matches) { | |
| 908 | + $link_text = $this->runSpanGamut($matches[2]); | |
| 909 | + $url = $matches[3] === '' ? $matches[4] : $matches[3]; | |
| 910 | + $title_quote =& $matches[6]; | |
| 911 | + $title =& $matches[7]; | |
| 912 | + $attr = $this->doExtraAttributes("a", $dummy =& $matches[8]); | |
| 913 | + | |
| 914 | + // if the URL was of the form <s p a c e s> it got caught by the HTML | |
| 915 | + // tag parser and hashed. Need to reverse the process before using the URL. | |
| 916 | + $unhashed = $this->unhash($url); | |
| 917 | + if ($unhashed !== $url) | |
| 918 | + $url = preg_replace('/^<(.*)>$/', '\1', $unhashed); | |
| 919 | + | |
| 920 | + $url = $this->encodeURLAttribute($url); | |
| 921 | + | |
| 922 | + $result = "<a href=\"$url\""; | |
| 923 | + if (isset($title) && $title_quote) { | |
| 924 | + $title = $this->encodeAttribute($title); | |
| 925 | + $result .= " title=\"$title\""; | |
| 926 | + } | |
| 927 | + $result .= $attr; | |
| 928 | + | |
| 929 | + $link_text = $this->runSpanGamut($link_text); | |
| 930 | + $result .= ">$link_text</a>"; | |
| 931 | + | |
| 932 | + return $this->hashPart($result); | |
| 933 | + } | |
| 934 | + | |
| 935 | + /** | |
| 936 | + * Turn Markdown image shortcuts into <img> tags. | |
| 937 | + * @param string $text | |
| 938 | + * @return string | |
| 939 | + */ | |
| 940 | + protected function doImages($text) { | |
| 941 | + // First, handle reference-style labeled images: ![alt text][id] | |
| 942 | + $text = preg_replace_callback('{ | |
| 943 | + ( # wrap whole match in $1 | |
| 944 | + !\[ | |
| 945 | + (' . $this->nested_brackets_re . ') # alt text = $2 | |
| 946 | + \] | |
| 947 | + | |
| 948 | + [ ]? # one optional space | |
| 949 | + (?:\n[ ]*)? # one optional newline followed by spaces | |
| 950 | + | |
| 951 | + \[ | |
| 952 | + (.*?) # id = $3 | |
| 953 | + \] | |
| 954 | + | |
| 955 | + ) | |
| 956 | + }xs', | |
| 957 | + array($this, '_doImages_reference_callback'), $text); | |
| 958 | + | |
| 959 | + // Next, handle inline images:  | |
| 960 | + // Don't forget: encode * and _ | |
| 961 | + $text = preg_replace_callback('{ | |
| 962 | + ( # wrap whole match in $1 | |
| 963 | + !\[ | |
| 964 | + (' . $this->nested_brackets_re . ') # alt text = $2 | |
| 965 | + \] | |
| 966 | + \s? # One optional whitespace character | |
| 967 | + \( # literal paren | |
| 968 | + [ \n]* | |
| 969 | + (?: | |
| 970 | + <(\S*)> # src url = $3 | |
| 971 | + | | |
| 972 | + (' . $this->nested_url_parenthesis_re . ') # src url = $4 | |
| 973 | + ) | |
| 974 | + [ \n]* | |
| 975 | + ( # $5 | |
| 976 | + ([\'"]) # quote char = $6 | |
| 977 | + (.*?) # title = $7 | |
| 978 | + \6 # matching quote | |
| 979 | + [ \n]* | |
| 980 | + )? # title is optional | |
| 981 | + \) | |
| 982 | + (?:[ ]? ' . $this->id_class_attr_catch_re . ' )? # $8 = id/class attributes | |
| 983 | + ) | |
| 984 | + }xs', | |
| 985 | + array($this, '_doImages_inline_callback'), $text); | |
| 986 | + | |
| 987 | + return $text; | |
| 988 | + } | |
| 989 | + | |
| 990 | + /** | |
| 991 | + * Callback for referenced images | |
| 992 | + * @param array $matches | |
| 993 | + * @return string | |
| 994 | + */ | |
| 995 | + protected function _doImages_reference_callback($matches) { | |
| 996 | + $whole_match = $matches[1]; | |
| 997 | + $alt_text = $matches[2]; | |
| 998 | + $link_id = strtolower($matches[3]); | |
| 999 | + | |
| 1000 | + if ($link_id === "") { | |
| 1001 | + $link_id = strtolower($alt_text); // for shortcut links like ![this][]. | |
| 1002 | + } | |
| 1003 | + | |
| 1004 | + $alt_text = $this->encodeAttribute($alt_text); | |
| 1005 | + if (isset($this->urls[$link_id])) { | |
| 1006 | + $url = $this->encodeURLAttribute($this->urls[$link_id]); | |
| 1007 | + $result = "<img src=\"$url\" alt=\"$alt_text\""; | |
| 1008 | + if (isset($this->titles[$link_id])) { | |
| 1009 | + $title = $this->titles[$link_id]; | |
| 1010 | + $title = $this->encodeAttribute($title); | |
| 1011 | + $result .= " title=\"$title\""; | |
| 1012 | + } | |
| 1013 | + if (isset($this->ref_attr[$link_id])) { | |
| 1014 | + $result .= $this->ref_attr[$link_id]; | |
| 1015 | + } | |
| 1016 | + $result .= $this->empty_element_suffix; | |
| 1017 | + $result = $this->hashPart($result); | |
| 1018 | + } | |
| 1019 | + else { | |
| 1020 | + // If there's no such link ID, leave intact: | |
| 1021 | + $result = $whole_match; | |
| 1022 | + } | |
| 1023 | + | |
| 1024 | + return $result; | |
| 1025 | + } | |
| 1026 | + | |
| 1027 | + /** | |
| 1028 | + * Callback for inline images | |
| 1029 | + * @param array $matches | |
| 1030 | + * @return string | |
| 1031 | + */ | |
| 1032 | + protected function _doImages_inline_callback($matches) { | |
| 1033 | + $alt_text = $matches[2]; | |
| 1034 | + $url = $matches[3] === '' ? $matches[4] : $matches[3]; | |
| 1035 | + $title_quote =& $matches[6]; | |
| 1036 | + $title =& $matches[7]; | |
| 1037 | + $attr = $this->doExtraAttributes("img", $dummy =& $matches[8]); | |
| 1038 | + | |
| 1039 | + $alt_text = $this->encodeAttribute($alt_text); | |
| 1040 | + $url = $this->encodeURLAttribute($url); | |
| 1041 | + $result = "<img src=\"$url\" alt=\"$alt_text\""; | |
| 1042 | + if (isset($title) && $title_quote) { | |
| 1043 | + $title = $this->encodeAttribute($title); | |
| 1044 | + $result .= " title=\"$title\""; // $title already quoted | |
| 1045 | + } | |
| 1046 | + $result .= $attr; | |
| 1047 | + $result .= $this->empty_element_suffix; | |
| 1048 | + | |
| 1049 | + return $this->hashPart($result); | |
| 1050 | + } | |
| 1051 | + | |
| 1052 | + /** | |
| 1053 | + * Process markdown headers. Redefined to add ID and class attribute support. | |
| 1054 | + * @param string $text | |
| 1055 | + * @return string | |
| 1056 | + */ | |
| 1057 | + protected function doHeaders($text) { | |
| 1058 | + // Setext-style headers: | |
| 1059 | + // Header 1 {#header1} | |
| 1060 | + // ======== | |
| 1061 | + // | |
| 1062 | + // Header 2 {#header2 .class1 .class2} | |
| 1063 | + // -------- | |
| 1064 | + // | |
| 1065 | + $text = preg_replace_callback( | |
| 1066 | + '{ | |
| 1067 | + (^.+?) # $1: Header text | |
| 1068 | + (?:[ ]+ ' . $this->id_class_attr_catch_re . ' )? # $3 = id/class attributes | |
| 1069 | + [ ]*\n(=+|-+)[ ]*\n+ # $3: Header footer | |
| 1070 | + }mx', | |
| 1071 | + array($this, '_doHeaders_callback_setext'), $text); | |
| 1072 | + | |
| 1073 | + // atx-style headers: | |
| 1074 | + // # Header 1 {#header1} | |
| 1075 | + // ## Header 2 {#header2} | |
| 1076 | + // ## Header 2 with closing hashes ## {#header3.class1.class2} | |
| 1077 | + // ... | |
| 1078 | + // ###### Header 6 {.class2} | |
| 1079 | + // | |
| 1080 | + $text = preg_replace_callback('{ | |
| 1081 | + ^(\#{1,6}) # $1 = string of #\'s | |
| 1082 | + [ ]'.($this->hashtag_protection ? '+' : '*').' | |
| 1083 | + (.+?) # $2 = Header text | |
| 1084 | + [ ]* | |
| 1085 | + \#* # optional closing #\'s (not counted) | |
| 1086 | + (?:[ ]+ ' . $this->id_class_attr_catch_re . ' )? # $3 = id/class attributes | |
| 1087 | + [ ]* | |
| 1088 | + \n+ | |
| 1089 | + }xm', | |
| 1090 | + array($this, '_doHeaders_callback_atx'), $text); | |
| 1091 | + | |
| 1092 | + return $text; | |
| 1093 | + } | |
| 1094 | + | |
| 1095 | + /** | |
| 1096 | + * Callback for setext headers | |
| 1097 | + * @param array $matches | |
| 1098 | + * @return string | |
| 1099 | + */ | |
| 1100 | + protected function _doHeaders_callback_setext($matches) { | |
| 1101 | + if ($matches[3] === '-' && preg_match('{^- }', $matches[1])) { | |
| 1102 | + return $matches[0]; | |
| 1103 | + } | |
| 1104 | + | |
| 1105 | + $level = $matches[3][0] === '=' ? 1 : 2; | |
| 1106 | + | |
| 1107 | + $defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[1]) : null; | |
| 1108 | + | |
| 1109 | + $attr = $this->doExtraAttributes("h$level", $dummy =& $matches[2], $defaultId); | |
| 1110 | + $block = "<h$level$attr>" . $this->runSpanGamut($matches[1]) . "</h$level>"; | |
| 1111 | + return "\n" . $this->hashBlock($block) . "\n\n"; | |
| 1112 | + } | |
| 1113 | + | |
| 1114 | + /** | |
| 1115 | + * Callback for atx headers | |
| 1116 | + * @param array $matches | |
| 1117 | + * @return string | |
| 1118 | + */ | |
| 1119 | + protected function _doHeaders_callback_atx($matches) { | |
| 1120 | + $level = strlen($matches[1]); | |
| 1121 | + | |
| 1122 | + $defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[2]) : null; | |
| 1123 | + $attr = $this->doExtraAttributes("h$level", $dummy =& $matches[3], $defaultId); | |
| 1124 | + $block = "<h$level$attr>" . $this->runSpanGamut($matches[2]) . "</h$level>"; | |
| 1125 | + return "\n" . $this->hashBlock($block) . "\n\n"; | |
| 1126 | + } | |
| 1127 | + | |
| 1128 | + /** | |
| 1129 | + * Form HTML tables. | |
| 1130 | + * @param string $text | |
| 1131 | + * @return string | |
| 1132 | + */ | |
| 1133 | + protected function doTables($text) { | |
| 1134 | + $less_than_tab = $this->tab_width - 1; | |
| 1135 | + // Find tables with leading pipe. | |
| 1136 | + // | |
| 1137 | + // | Header 1 | Header 2 | |
| 1138 | + // | -------- | -------- | |
| 1139 | + // | Cell 1 | Cell 2 | |
| 1140 | + // | Cell 3 | Cell 4 | |
| 1141 | + $text = preg_replace_callback(' | |
| 1142 | + { | |
| 1143 | + ^ # Start of a line | |
| 1144 | + [ ]{0,' . $less_than_tab . '} # Allowed whitespace. | |
| 1145 | + [|] # Optional leading pipe (present) | |
| 1146 | + (.+) \n # $1: Header row (at least one pipe) | |
| 1147 | + | |
| 1148 | + [ ]{0,' . $less_than_tab . '} # Allowed whitespace. | |
| 1149 | + [|] ([ ]*[-:]+[-| :]*) \n # $2: Header underline | |
| 1150 | + | |
| 1151 | + ( # $3: Cells | |
| 1152 | + (?> | |
| 1153 | + [ ]* # Allowed whitespace. | |
| 1154 | + [|] .* \n # Row content. | |
| 1155 | + )* | |
| 1156 | + ) | |
| 1157 | + (?=\n|\Z) # Stop at final double newline. | |
| 1158 | + }xm', | |
| 1159 | + array($this, '_doTable_leadingPipe_callback'), $text); | |
| 1160 | + | |
| 1161 | + // Find tables without leading pipe. | |
| 1162 | + // | |
| 1163 | + // Header 1 | Header 2 | |
| 1164 | + // -------- | -------- | |
| 1165 | + // Cell 1 | Cell 2 | |
| 1166 | + // Cell 3 | Cell 4 | |
| 1167 | + $text = preg_replace_callback(' | |
| 1168 | + { | |
| 1169 | + ^ # Start of a line | |
| 1170 | + [ ]{0,' . $less_than_tab . '} # Allowed whitespace. | |
| 1171 | + (\S.*[|].*) \n # $1: Header row (at least one pipe) | |
| 1172 | + | |
| 1173 | + [ ]{0,' . $less_than_tab . '} # Allowed whitespace. | |
| 1174 | + ([-:]+[ ]*[|][-| :]*) \n # $2: Header underline | |
| 1175 | + | |
| 1176 | + ( # $3: Cells | |
| 1177 | + (?> | |
| 1178 | + .* [|] .* \n # Row content | |
| 1179 | + )* | |
| 1180 | + ) | |
| 1181 | + (?=\n|\Z) # Stop at final double newline. | |
| 1182 | + }xm', | |
| 1183 | + array($this, '_DoTable_callback'), $text); | |
| 1184 | + | |
| 1185 | + return $text; | |
| 1186 | + } | |
| 1187 | + | |
| 1188 | + /** | |
| 1189 | + * Callback for removing the leading pipe for each row | |
| 1190 | + * @param array $matches | |
| 1191 | + * @return string | |
| 1192 | + */ | |
| 1193 | + protected function _doTable_leadingPipe_callback($matches) { | |
| 1194 | + $head = $matches[1]; | |
| 1195 | + $underline = $matches[2]; | |
| 1196 | + $content = $matches[3]; | |
| 1197 | + | |
| 1198 | + $content = preg_replace('/^ *[|]/m', '', $content); | |
| 1199 | + | |
| 1200 | + return $this->_doTable_callback(array($matches[0], $head, $underline, $content)); | |
| 1201 | + } | |
| 1202 | + | |
| 1203 | + /** | |
| 1204 | + * Make the align attribute in a table | |
| 1205 | + * @param string $alignname | |
| 1206 | + * @return string | |
| 1207 | + */ | |
| 1208 | + protected function _doTable_makeAlignAttr($alignname) { | |
| 1209 | + if (empty($this->table_align_class_tmpl)) { | |
| 1210 | + return " align=\"$alignname\""; | |
| 1211 | + } | |
| 1212 | + | |
| 1213 | + $classname = str_replace('%%', $alignname, $this->table_align_class_tmpl); | |
| 1214 | + return " class=\"$classname\""; | |
| 1215 | + } | |
| 1216 | + | |
| 1217 | + /** | |
| 1218 | + * Calback for processing tables | |
| 1219 | + * @param array $matches | |
| 1220 | + * @return string | |
| 1221 | + */ | |
| 1222 | + protected function _doTable_callback($matches) { | |
| 1223 | + $head = $matches[1]; | |
| 1224 | + $underline = $matches[2]; | |
| 1225 | + $content = $matches[3]; | |
| 1226 | + $attr = []; | |
| 1227 | + | |
| 1228 | + // Remove any tailing pipes for each line. | |
| 1229 | + $head = preg_replace('/[|] *$/m', '', $head); | |
| 1230 | + $underline = preg_replace('/[|] *$/m', '', $underline); | |
| 1231 | + $content = preg_replace('/[|] *$/m', '', $content); | |
| 1232 | + | |
| 1233 | + // Reading alignement from header underline. | |
| 1234 | + $separators = preg_split('/ *[|] */', $underline); | |
| 1235 | + foreach ($separators as $n => $s) { | |
| 1236 | + if (preg_match('/^ *-+: *$/', $s)) | |
| 1237 | + $attr[$n] = $this->_doTable_makeAlignAttr('right'); | |
| 1238 | + else if (preg_match('/^ *:-+: *$/', $s)) | |
| 1239 | + $attr[$n] = $this->_doTable_makeAlignAttr('center'); | |
| 1240 | + else if (preg_match('/^ *:-+ *$/', $s)) | |
| 1241 | + $attr[$n] = $this->_doTable_makeAlignAttr('left'); | |
| 1242 | + else | |
| 1243 | + $attr[$n] = ''; | |
| 1244 | + } | |
| 1245 | + | |
| 1246 | + // Parsing span elements, including code spans, character escapes, | |
| 1247 | + // and inline HTML tags, so that pipes inside those gets ignored. | |
| 1248 | + $head = $this->parseSpan($head); | |
| 1249 | + $headers = preg_split('/ *[|] */', $head); | |
| 1250 | + $col_count = count($headers); | |
| 1251 | + $attr = array_pad($attr, $col_count, ''); | |
| 1252 | + | |
| 1253 | + // Write column headers. | |
| 1254 | + $text = "<table>\n"; | |
| 1255 | + $text .= "<thead>\n"; | |
| 1256 | + $text .= "<tr>\n"; | |
| 1257 | + foreach ($headers as $n => $header) { | |
| 1258 | + $text .= " <th$attr[$n]>" . $this->runSpanGamut(trim($header)) . "</th>\n"; | |
| 1259 | + } | |
| 1260 | + $text .= "</tr>\n"; | |
| 1261 | + $text .= "</thead>\n"; | |
| 1262 | + | |
| 1263 | + // Split content by row. | |
| 1264 | + $rows = explode("\n", trim($content, "\n")); | |
| 1265 | + | |
| 1266 | + $text .= "<tbody>\n"; | |
| 1267 | + foreach ($rows as $row) { | |
| 1268 | + // Parsing span elements, including code spans, character escapes, | |
| 1269 | + // and inline HTML tags, so that pipes inside those gets ignored. | |
| 1270 | + $row = $this->parseSpan($row); | |
| 1271 | + | |
| 1272 | + // Split row by cell. | |
| 1273 | + $row_cells = preg_split('/ *[|] */', $row, $col_count); | |
| 1274 | + $row_cells = array_pad($row_cells, $col_count, ''); | |
| 1275 | + | |
| 1276 | + $text .= "<tr>\n"; | |
| 1277 | + foreach ($row_cells as $n => $cell) { | |
| 1278 | + $text .= " <td$attr[$n]>" . $this->runSpanGamut(trim($cell)) . "</td>\n"; | |
| 1279 | + } | |
| 1280 | + $text .= "</tr>\n"; | |
| 1281 | + } | |
| 1282 | + $text .= "</tbody>\n"; | |
| 1283 | + $text .= "</table>"; | |
| 1284 | + | |
| 1285 | + return $this->hashBlock($text) . "\n"; | |
| 1286 | + } | |
| 1287 | + | |
| 1288 | + /** | |
| 1289 | + * Form HTML definition lists. | |
| 1290 | + * @param string $text | |
| 1291 | + * @return string | |
| 1292 | + */ | |
| 1293 | + protected function doDefLists($text) { | |
| 1294 | + $less_than_tab = $this->tab_width - 1; | |
| 1295 | + | |
| 1296 | + // Re-usable pattern to match any entire dl list: | |
| 1297 | + $whole_list_re = '(?> | |
| 1298 | + ( # $1 = whole list | |
| 1299 | + ( # $2 | |
| 1300 | + [ ]{0,' . $less_than_tab . '} | |
| 1301 | + ((?>.*\S.*\n)+) # $3 = defined term | |
| 1302 | + \n? | |
| 1303 | + [ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition | |
| 1304 | + ) | |
| 1305 | + (?s:.+?) | |
| 1306 | + ( # $4 | |
| 1307 | + \z | |
| 1308 | + | | |
| 1309 | + \n{2,} | |
| 1310 | + (?=\S) | |
| 1311 | + (?! # Negative lookahead for another term | |
| 1312 | + [ ]{0,' . $less_than_tab . '} | |
| 1313 | + (?: \S.*\n )+? # defined term | |
| 1314 | + \n? | |
| 1315 | + [ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition | |
| 1316 | + ) | |
| 1317 | + (?! # Negative lookahead for another definition | |
| 1318 | + [ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition | |
| 1319 | + ) | |
| 1320 | + ) | |
| 1321 | + ) | |
| 1322 | + )'; // mx | |
| 1323 | + | |
| 1324 | + $text = preg_replace_callback('{ | |
| 1325 | + (?>\A\n?|(?<=\n\n)) | |
| 1326 | + ' . $whole_list_re . ' | |
| 1327 | + }mx', | |
| 1328 | + array($this, '_doDefLists_callback'), $text); | |
| 1329 | + | |
| 1330 | + return $text; | |
| 1331 | + } | |
| 1332 | + | |
| 1333 | + /** | |
| 1334 | + * Callback for processing definition lists | |
| 1335 | + * @param array $matches | |
| 1336 | + * @return string | |
| 1337 | + */ | |
| 1338 | + protected function _doDefLists_callback($matches) { | |
| 1339 | + // Re-usable patterns to match list item bullets and number markers: | |
| 1340 | + $list = $matches[1]; | |
| 1341 | + | |
| 1342 | + // Turn double returns into triple returns, so that we can make a | |
| 1343 | + // paragraph for the last item in a list, if necessary: | |
| 1344 | + $result = trim($this->processDefListItems($list)); | |
| 1345 | + $result = "<dl>\n" . $result . "\n</dl>"; | |
| 1346 | + return $this->hashBlock($result) . "\n\n"; | |
| 1347 | + } | |
| 1348 | + | |
| 1349 | + /** | |
| 1350 | + * Process the contents of a single definition list, splitting it | |
| 1351 | + * into individual term and definition list items. | |
| 1352 | + * @param string $list_str | |
| 1353 | + * @return string | |
| 1354 | + */ | |
| 1355 | + protected function processDefListItems($list_str) { | |
| 1356 | + | |
| 1357 | + $less_than_tab = $this->tab_width - 1; | |
| 1358 | + | |
| 1359 | + // Trim trailing blank lines: | |
| 1360 | + $list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str); | |
| 1361 | + | |
| 1362 | + // Process definition terms. | |
| 1363 | + $list_str = preg_replace_callback('{ | |
| 1364 | + (?>\A\n?|\n\n+) # leading line | |
| 1365 | + ( # definition terms = $1 | |
| 1366 | + [ ]{0,' . $less_than_tab . '} # leading whitespace | |
| 1367 | + (?!\:[ ]|[ ]) # negative lookahead for a definition | |
| 1368 | + # mark (colon) or more whitespace. | |
| 1369 | + (?> \S.* \n)+? # actual term (not whitespace). | |
| 1370 | + ) | |
| 1371 | + (?=\n?[ ]{0,3}:[ ]) # lookahead for following line feed | |
| 1372 | + # with a definition mark. | |
| 1373 | + }xm', | |
| 1374 | + array($this, '_processDefListItems_callback_dt'), $list_str); | |
| 1375 | + | |
| 1376 | + // Process actual definitions. | |
| 1377 | + $list_str = preg_replace_callback('{ | |
| 1378 | + \n(\n+)? # leading line = $1 | |
| 1379 | + ( # marker space = $2 | |
| 1380 | + [ ]{0,' . $less_than_tab . '} # whitespace before colon | |
| 1381 | + \:[ ]+ # definition mark (colon) | |
| 1382 | + ) | |
| 1383 | + ((?s:.+?)) # definition text = $3 | |
| 1384 | + (?= \n+ # stop at next definition mark, | |
| 1385 | + (?: # next term or end of text | |
| 1386 | + [ ]{0,' . $less_than_tab . '} \:[ ] | | |
| 1387 | + <dt> | \z | |
| 1388 | + ) | |
| 1389 | + ) | |
| 1390 | + }xm', | |
| 1391 | + array($this, '_processDefListItems_callback_dd'), $list_str); | |
| 1392 | + | |
| 1393 | + return $list_str; | |
| 1394 | + } | |
| 1395 | + | |
| 1396 | + /** | |
| 1397 | + * Callback for <dt> elements in definition lists | |
| 1398 | + * @param array $matches | |
| 1399 | + * @return string | |
| 1400 | + */ | |
| 1401 | + protected function _processDefListItems_callback_dt($matches) { | |
| 1402 | + $terms = explode("\n", trim($matches[1])); | |
| 1403 | + $text = ''; | |
| 1404 | + foreach ($terms as $term) { | |
| 1405 | + $term = $this->runSpanGamut(trim($term)); | |
| 1406 | + $text .= "\n<dt>" . $term . "</dt>"; | |
| 1407 | + } | |
| 1408 | + return $text . "\n"; | |
| 1409 | + } | |
| 1410 | + | |
| 1411 | + /** | |
| 1412 | + * Callback for <dd> elements in definition lists | |
| 1413 | + * @param array $matches | |
| 1414 | + * @return string | |
| 1415 | + */ | |
| 1416 | + protected function _processDefListItems_callback_dd($matches) { | |
| 1417 | + $leading_line = $matches[1]; | |
| 1418 | + $marker_space = $matches[2]; | |
| 1419 | + $def = $matches[3]; | |
| 1420 | + | |
| 1421 | + if ($leading_line || preg_match('/\n{2,}/', $def)) { | |
| 1422 | + // Replace marker with the appropriate whitespace indentation | |
| 1423 | + $def = str_repeat(' ', strlen($marker_space)) . $def; | |
| 1424 | + $def = $this->runBlockGamut($this->outdent($def . "\n\n")); | |
| 1425 | + $def = "\n". $def ."\n"; | |
| 1426 | + } | |
| 1427 | + else { | |
| 1428 | + $def = rtrim($def); | |
| 1429 | + $def = $this->runSpanGamut($this->outdent($def)); | |
| 1430 | + } | |
| 1431 | + | |
| 1432 | + return "\n<dd>" . $def . "</dd>\n"; | |
| 1433 | + } | |
| 1434 | + | |
| 1435 | + /** | |
| 1436 | + * Adding the fenced code block syntax to regular Markdown: | |
| 1437 | + * | |
| 1438 | + * ~~~ | |
| 1439 | + * Code block | |
| 1440 | + * ~~~ | |
| 1441 | + * | |
| 1442 | + * @param string $text | |
| 1443 | + * @return string | |
| 1444 | + */ | |
| 1445 | + protected function doFencedCodeBlocks($text) { | |
| 1446 | + | |
| 1447 | + $text = preg_replace_callback('{ | |
| 1448 | + (?:\n|\A) | |
| 1449 | + # 1: Opening marker | |
| 1450 | + ( | |
| 1451 | + (?:~{3,}|`{3,}) # 3 or more tildes/backticks. | |
| 1452 | + ) | |
| 1453 | + [ ]* | |
| 1454 | + (?: | |
| 1455 | + \.?([-_:a-zA-Z0-9]+) # 2: standalone class name | |
| 1456 | + )? | |
| 1457 | + [ ]* | |
| 1458 | + (?: | |
| 1459 | + ' . $this->id_class_attr_catch_re . ' # 3: Extra attributes | |
| 1460 | + )? | |
| 1461 | + [ ]* \n # Whitespace and newline following marker. | |
| 1462 | + | |
| 1463 | + # 4: Content | |
| 1464 | + ( | |
| 1465 | + (?> | |
| 1466 | + (?!\1 [ ]* \n) # Not a closing marker. | |
| 1467 | + .*\n+ | |
| 1468 | + )+ | |
| 1469 | + ) | |
| 1470 | + | |
| 1471 | + # Closing marker. | |
| 1472 | + \1 [ ]* (?= \n ) | |
| 1473 | + }xm', | |
| 1474 | + array($this, '_doFencedCodeBlocks_callback'), $text); | |
| 1475 | + | |
| 1476 | + return $text; | |
| 1477 | + } | |
| 1478 | + | |
| 1479 | + /** | |
| 1480 | + * Callback to process fenced code blocks | |
| 1481 | + * @param array $matches | |
| 1482 | + * @return string | |
| 1483 | + */ | |
| 1484 | + protected function _doFencedCodeBlocks_callback($matches) { | |
| 1485 | + $classname =& $matches[2]; | |
| 1486 | + $attrs =& $matches[3]; | |
| 1487 | + $codeblock = $matches[4]; | |
| 1488 | + | |
| 1489 | + if ($this->code_block_content_func) { | |
| 1490 | + $codeblock = call_user_func($this->code_block_content_func, $codeblock, $classname); | |
| 1491 | + } else { | |
| 1492 | + $codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES); | |
| 1493 | + } | |
| 1494 | + | |
| 1495 | + $codeblock = preg_replace_callback('/^\n+/', | |
| 1496 | + array($this, '_doFencedCodeBlocks_newlines'), $codeblock); | |
| 1497 | + | |
| 1498 | + $classes = array(); | |
| 1499 | + if ($classname !== "") { | |
| 1500 | + if ($classname[0] === '.') { | |
| 1501 | + $classname = substr($classname, 1); | |
| 1502 | + } | |
| 1503 | + $classes[] = $this->code_class_prefix . $classname; | |
| 1504 | + } | |
| 1505 | + $attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs, null, $classes); | |
| 1506 | + $pre_attr_str = $this->code_attr_on_pre ? $attr_str : ''; | |
| 1507 | + $code_attr_str = $this->code_attr_on_pre ? '' : $attr_str; | |
| 1508 | + $codeblock = "<pre$pre_attr_str><code$code_attr_str>$codeblock</code></pre>"; | |
| 1509 | + | |
| 1510 | + return "\n\n".$this->hashBlock($codeblock)."\n\n"; | |
| 1511 | + } | |
| 1512 | + | |
| 1513 | + /** | |
| 1514 | + * Replace new lines in fenced code blocks | |
| 1515 | + * @param array $matches | |
| 1516 | + * @return string | |
| 1517 | + */ | |
| 1518 | + protected function _doFencedCodeBlocks_newlines($matches) { | |
| 1519 | + return str_repeat("<br$this->empty_element_suffix", | |
| 1520 | + strlen($matches[0])); | |
| 1521 | + } | |
| 1522 | + | |
| 1523 | + /** | |
| 1524 | + * Redefining emphasis markers so that emphasis by underscore does not | |
| 1525 | + * work in the middle of a word. | |
| 1526 | + * @var array | |
| 1527 | + * | |
| 1528 | + * 2025/03/19 jsmoriss - removed array type definition to avoid PHP error. | |
| 1529 | + */ | |
| 1530 | + protected $em_relist = array( | |
| 1531 | + '' => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)', | |
| 1532 | + '*' => '(?<![\s*])\*(?!\*)', | |
| 1533 | + '_' => '(?<![\s_])_(?![a-zA-Z0-9_])', | |
| 1534 | + ); | |
| 1535 | + protected $strong_relist = array( | |
| 1536 | + '' => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)', | |
| 1537 | + '**' => '(?<![\s*])\*\*(?!\*)', | |
| 1538 | + '__' => '(?<![\s_])__(?![a-zA-Z0-9_])', | |
| 1539 | + ); | |
| 1540 | + protected $em_strong_relist = array( | |
| 1541 | + '' => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)', | |
| 1542 | + '***' => '(?<![\s*])\*\*\*(?!\*)', | |
| 1543 | + '___' => '(?<![\s_])___(?![a-zA-Z0-9_])', | |
| 1544 | + ); | |
| 1545 | + | |
| 1546 | + /** | |
| 1547 | + * Parse text into paragraphs | |
| 1548 | + * @param string $text String to process in paragraphs | |
| 1549 | + * @param boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags | |
| 1550 | + * @return string HTML output | |
| 1551 | + */ | |
| 1552 | + protected function formParagraphs($text, $wrap_in_p = true) { | |
| 1553 | + // Strip leading and trailing lines: | |
| 1554 | + $text = preg_replace('/\A\n+|\n+\z/', '', $text); | |
| 1555 | + | |
| 1556 | + $grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY); | |
| 1557 | + | |
| 1558 | + // Wrap <p> tags and unhashify HTML blocks | |
| 1559 | + foreach ($grafs as $key => $value) { | |
| 1560 | + $value = trim($this->runSpanGamut($value)); | |
| 1561 | + | |
| 1562 | + // Check if this should be enclosed in a paragraph. | |
| 1563 | + // Clean tag hashes & block tag hashes are left alone. | |
| 1564 | + $is_p = $wrap_in_p && !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value); | |
| 1565 | + | |
| 1566 | + if ($is_p) { | |
| 1567 | + $value = "<p>$value</p>"; | |
| 1568 | + } | |
| 1569 | + $grafs[$key] = $value; | |
| 1570 | + } | |
| 1571 | + | |
| 1572 | + // Join grafs in one text, then unhash HTML tags. | |
| 1573 | + $text = implode("\n\n", $grafs); | |
| 1574 | + | |
| 1575 | + // Finish by removing any tag hashes still present in $text. | |
| 1576 | + $text = $this->unhash($text); | |
| 1577 | + | |
| 1578 | + return $text; | |
| 1579 | + } | |
| 1580 | + | |
| 1581 | + | |
| 1582 | + /** | |
| 1583 | + * Footnotes - Strips link definitions from text, stores the URLs and | |
| 1584 | + * titles in hash references. | |
| 1585 | + * @param string $text | |
| 1586 | + * @return string | |
| 1587 | + */ | |
| 1588 | + protected function stripFootnotes($text) { | |
| 1589 | + $less_than_tab = $this->tab_width - 1; | |
| 1590 | + | |
| 1591 | + // Link defs are in the form: [^id]: url "optional title" | |
| 1592 | + $text = preg_replace_callback('{ | |
| 1593 | + ^[ ]{0,' . $less_than_tab . '}\[\^(.+?)\][ ]?: # note_id = $1 | |
| 1594 | + [ ]* | |
| 1595 | + \n? # maybe *one* newline | |
| 1596 | + ( # text = $2 (no blank lines allowed) | |
| 1597 | + (?: | |
| 1598 | + .+ # actual text | |
| 1599 | + | | |
| 1600 | + \n # newlines but | |
| 1601 | + (?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker. | |
| 1602 | + (?!\n+[ ]{0,3}\S)# ensure line is not blank and followed | |
| 1603 | + # by non-indented content | |
| 1604 | + )* | |
| 1605 | + ) | |
| 1606 | + }xm', | |
| 1607 | + array($this, '_stripFootnotes_callback'), | |
| 1608 | + $text); | |
| 1609 | + return $text; | |
| 1610 | + } | |
| 1611 | + | |
| 1612 | + /** | |
| 1613 | + * Callback for stripping footnotes | |
| 1614 | + * @param array $matches | |
| 1615 | + * @return string | |
| 1616 | + */ | |
| 1617 | + protected function _stripFootnotes_callback($matches) { | |
| 1618 | + $note_id = $this->fn_id_prefix . $matches[1]; | |
| 1619 | + $this->footnotes[$note_id] = $this->outdent($matches[2]); | |
| 1620 | + return ''; // String that will replace the block | |
| 1621 | + } | |
| 1622 | + | |
| 1623 | + /** | |
| 1624 | + * Replace footnote references in $text [^id] with a special text-token | |
| 1625 | + * which will be replaced by the actual footnote marker in appendFootnotes. | |
| 1626 | + * @param string $text | |
| 1627 | + * @return string | |
| 1628 | + */ | |
| 1629 | + protected function doFootnotes($text) { | |
| 1630 | + if (!$this->in_anchor) { | |
| 1631 | + $text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text); | |
| 1632 | + } | |
| 1633 | + return $text; | |
| 1634 | + } | |
| 1635 | + | |
| 1636 | + /** | |
| 1637 | + * Append footnote list to text | |
| 1638 | + * @param string $text | |
| 1639 | + * @return string | |
| 1640 | + */ | |
| 1641 | + protected function appendFootnotes($text) { | |
| 1642 | + $text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', | |
| 1643 | + array($this, '_appendFootnotes_callback'), $text); | |
| 1644 | + | |
| 1645 | + if ( ! empty( $this->footnotes_ordered ) ) { | |
| 1646 | + $this->_doFootnotes(); | |
| 1647 | + if ( ! $this->omit_footnotes ) { | |
| 1648 | + $text .= "\n\n"; | |
| 1649 | + $text .= "<div class=\"footnotes\" role=\"doc-endnotes\">\n"; | |
| 1650 | + $text .= "<hr" . $this->empty_element_suffix . "\n"; | |
| 1651 | + $text .= $this->footnotes_assembled; | |
| 1652 | + $text .= "</div>"; | |
| 1653 | + } | |
| 1654 | + } | |
| 1655 | + return $text; | |
| 1656 | + } | |
| 1657 | + | |
| 1658 | + | |
| 1659 | + /** | |
| 1660 | + * Generates the HTML for footnotes. Called by appendFootnotes, even if | |
| 1661 | + * footnotes are not being appended. | |
| 1662 | + * @return void | |
| 1663 | + */ | |
| 1664 | + protected function _doFootnotes() { | |
| 1665 | + $attr = array(); | |
| 1666 | + if ($this->fn_backlink_class !== "") { | |
| 1667 | + $class = $this->fn_backlink_class; | |
| 1668 | + $class = $this->encodeAttribute($class); | |
| 1669 | + $attr['class'] = " class=\"$class\""; | |
| 1670 | + } | |
| 1671 | + $attr['role'] = " role=\"doc-backlink\""; | |
| 1672 | + $num = 0; | |
| 1673 | + | |
| 1674 | + $text = "<ol>\n\n"; | |
| 1675 | + while (!empty($this->footnotes_ordered)) { | |
| 1676 | + $footnote = reset($this->footnotes_ordered); | |
| 1677 | + $note_id = key($this->footnotes_ordered); | |
| 1678 | + unset($this->footnotes_ordered[$note_id]); | |
| 1679 | + $ref_count = $this->footnotes_ref_count[$note_id]; | |
| 1680 | + unset($this->footnotes_ref_count[$note_id]); | |
| 1681 | + unset($this->footnotes[$note_id]); | |
| 1682 | + | |
| 1683 | + $footnote .= "\n"; // Need to append newline before parsing. | |
| 1684 | + $footnote = $this->runBlockGamut("$footnote\n"); | |
| 1685 | + $footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', | |
| 1686 | + array($this, '_appendFootnotes_callback'), $footnote); | |
| 1687 | + | |
| 1688 | + $num++; | |
| 1689 | + $note_id = $this->encodeAttribute($note_id); | |
| 1690 | + | |
| 1691 | + // Prepare backlink, multiple backlinks if multiple references | |
| 1692 | + // Do not create empty backlinks if the html is blank | |
| 1693 | + $backlink = ""; | |
| 1694 | + if (!empty($this->fn_backlink_html)) { | |
| 1695 | + for ($ref_num = 1; $ref_num <= $ref_count; ++$ref_num) { | |
| 1696 | + if (!empty($this->fn_backlink_title)) { | |
| 1697 | + $attr['title'] = ' title="' . $this->encodeAttribute($this->fn_backlink_title) . '"'; | |
| 1698 | + } | |
| 1699 | + if (!empty($this->fn_backlink_label)) { | |
| 1700 | + $attr['label'] = ' aria-label="' . $this->encodeAttribute($this->fn_backlink_label) . '"'; | |
| 1701 | + } | |
| 1702 | + $parsed_attr = $this->parseFootnotePlaceholders( | |
| 1703 | + implode('', $attr), | |
| 1704 | + $num, | |
| 1705 | + $ref_num | |
| 1706 | + ); | |
| 1707 | + $backlink_text = $this->parseFootnotePlaceholders( | |
| 1708 | + $this->fn_backlink_html, | |
| 1709 | + $num, | |
| 1710 | + $ref_num | |
| 1711 | + ); | |
| 1712 | + $ref_count_mark = $ref_num > 1 ? $ref_num : ''; | |
| 1713 | + $backlink .= " <a href=\"#fnref$ref_count_mark:$note_id\"$parsed_attr>$backlink_text</a>"; | |
| 1714 | + } | |
| 1715 | + $backlink = trim($backlink); | |
| 1716 | + } | |
| 1717 | + | |
| 1718 | + // Add backlink to last paragraph; create new paragraph if needed. | |
| 1719 | + if (!empty($backlink)) { | |
| 1720 | + if (preg_match('{</p>$}', $footnote)) { | |
| 1721 | + $footnote = substr($footnote, 0, -4) . " $backlink</p>"; | |
| 1722 | + } else { | |
| 1723 | + $footnote .= "\n\n<p>$backlink</p>"; | |
| 1724 | + } | |
| 1725 | + } | |
| 1726 | + | |
| 1727 | + $text .= "<li id=\"fn:$note_id\" role=\"doc-endnote\">\n"; | |
| 1728 | + $text .= $footnote . "\n"; | |
| 1729 | + $text .= "</li>\n\n"; | |
| 1730 | + } | |
| 1731 | + $text .= "</ol>\n"; | |
| 1732 | + | |
| 1733 | + $this->footnotes_assembled = $text; | |
| 1734 | + } | |
| 1735 | + | |
| 1736 | + /** | |
| 1737 | + * Callback for appending footnotes | |
| 1738 | + * @param array $matches | |
| 1739 | + * @return string | |
| 1740 | + */ | |
| 1741 | + protected function _appendFootnotes_callback($matches) { | |
| 1742 | + $node_id = $this->fn_id_prefix . $matches[1]; | |
| 1743 | + | |
| 1744 | + // Create footnote marker only if it has a corresponding footnote *and* | |
| 1745 | + // the footnote hasn't been used by another marker. | |
| 1746 | + if (isset($this->footnotes[$node_id])) { | |
| 1747 | + $num =& $this->footnotes_numbers[$node_id]; | |
| 1748 | + if (!isset($num)) { | |
| 1749 | + // Transfer footnote content to the ordered list and give it its | |
| 1750 | + // number | |
| 1751 | + $this->footnotes_ordered[$node_id] = $this->footnotes[$node_id]; | |
| 1752 | + $this->footnotes_ref_count[$node_id] = 1; | |
| 1753 | + $num = $this->footnote_counter++; | |
| 1754 | + $ref_count_mark = ''; | |
| 1755 | + } else { | |
| 1756 | + $ref_count_mark = $this->footnotes_ref_count[$node_id] += 1; | |
| 1757 | + } | |
| 1758 | + | |
| 1759 | + $attr = ""; | |
| 1760 | + if ($this->fn_link_class !== "") { | |
| 1761 | + $class = $this->fn_link_class; | |
| 1762 | + $class = $this->encodeAttribute($class); | |
| 1763 | + $attr .= " class=\"$class\""; | |
| 1764 | + } | |
| 1765 | + if ($this->fn_link_title !== "") { | |
| 1766 | + $title = $this->fn_link_title; | |
| 1767 | + $title = $this->encodeAttribute($title); | |
| 1768 | + $attr .= " title=\"$title\""; | |
| 1769 | + } | |
| 1770 | + $attr .= " role=\"doc-noteref\""; | |
| 1771 | + | |
| 1772 | + $attr = str_replace("%%", $num, $attr); | |
| 1773 | + $node_id = $this->encodeAttribute($node_id); | |
| 1774 | + | |
| 1775 | + return | |
| 1776 | + "<sup id=\"fnref$ref_count_mark:$node_id\">". | |
| 1777 | + "<a href=\"#fn:$node_id\"$attr>$num</a>". | |
| 1778 | + "</sup>"; | |
| 1779 | + } | |
| 1780 | + | |
| 1781 | + return "[^" . $matches[1] . "]"; | |
| 1782 | + } | |
| 1783 | + | |
| 1784 | + /** | |
| 1785 | + * Build footnote label by evaluating any placeholders. | |
| 1786 | + * - ^^ footnote number | |
| 1787 | + * - %% footnote reference number (Nth reference to footnote number) | |
| 1788 | + * @param string $label | |
| 1789 | + * @param int $footnote_number | |
| 1790 | + * @param int $reference_number | |
| 1791 | + * @return string | |
| 1792 | + */ | |
| 1793 | + protected function parseFootnotePlaceholders($label, $footnote_number, $reference_number) { | |
| 1794 | + return str_replace( | |
| 1795 | + array('^^', '%%'), | |
| 1796 | + array($footnote_number, $reference_number), | |
| 1797 | + $label | |
| 1798 | + ); | |
| 1799 | + } | |
| 1800 | + | |
| 1801 | + | |
| 1802 | + /** | |
| 1803 | + * Abbreviations - strips abbreviations from text, stores titles in hash | |
| 1804 | + * references. | |
| 1805 | + * @param string $text | |
| 1806 | + * @return string | |
| 1807 | + */ | |
| 1808 | + protected function stripAbbreviations($text) { | |
| 1809 | + $less_than_tab = $this->tab_width - 1; | |
| 1810 | + | |
| 1811 | + // Link defs are in the form: [id]*: url "optional title" | |
| 1812 | + $text = preg_replace_callback('{ | |
| 1813 | + ^[ ]{0,' . $less_than_tab . '}\*\[(.+?)\][ ]?: # abbr_id = $1 | |
| 1814 | + (.*) # text = $2 (no blank lines allowed) | |
| 1815 | + }xm', | |
| 1816 | + array($this, '_stripAbbreviations_callback'), | |
| 1817 | + $text); | |
| 1818 | + return $text; | |
| 1819 | + } | |
| 1820 | + | |
| 1821 | + /** | |
| 1822 | + * Callback for stripping abbreviations | |
| 1823 | + * @param array $matches | |
| 1824 | + * @return string | |
| 1825 | + */ | |
| 1826 | + protected function _stripAbbreviations_callback($matches) { | |
| 1827 | + $abbr_word = $matches[1]; | |
| 1828 | + $abbr_desc = $matches[2]; | |
| 1829 | + if ($this->abbr_word_re) { | |
| 1830 | + $this->abbr_word_re .= '|'; | |
| 1831 | + } | |
| 1832 | + $this->abbr_word_re .= preg_quote($abbr_word); | |
| 1833 | + $this->abbr_desciptions[$abbr_word] = trim($abbr_desc); | |
| 1834 | + return ''; // String that will replace the block | |
| 1835 | + } | |
| 1836 | + | |
| 1837 | + /** | |
| 1838 | + * Find defined abbreviations in text and wrap them in <abbr> elements. | |
| 1839 | + * @param string $text | |
| 1840 | + * @return string | |
| 1841 | + */ | |
| 1842 | + protected function doAbbreviations($text) { | |
| 1843 | + if ($this->abbr_word_re) { | |
| 1844 | + // cannot use the /x modifier because abbr_word_re may | |
| 1845 | + // contain significant spaces: | |
| 1846 | + $text = preg_replace_callback('{' . | |
| 1847 | + '(?<![\w\x1A])' . | |
| 1848 | + '(?:' . $this->abbr_word_re . ')' . | |
| 1849 | + '(?![\w\x1A])' . | |
| 1850 | + '}', | |
| 1851 | + array($this, '_doAbbreviations_callback'), $text); | |
| 1852 | + } | |
| 1853 | + return $text; | |
| 1854 | + } | |
| 1855 | + | |
| 1856 | + /** | |
| 1857 | + * Callback for processing abbreviations | |
| 1858 | + * @param array $matches | |
| 1859 | + * @return string | |
| 1860 | + */ | |
| 1861 | + protected function _doAbbreviations_callback($matches) { | |
| 1862 | + $abbr = $matches[0]; | |
| 1863 | + if (isset($this->abbr_desciptions[$abbr])) { | |
| 1864 | + $desc = $this->abbr_desciptions[$abbr]; | |
| 1865 | + if (empty($desc)) { | |
| 1866 | + return $this->hashPart("<abbr>$abbr</abbr>"); | |
| 1867 | + } | |
| 1868 | + $desc = $this->encodeAttribute($desc); | |
| 1869 | + return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>"); | |
| 1870 | + } | |
| 1871 | + return $matches[0]; | |
| 1872 | + } | |
| 1873 | +} | |
