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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\DiscussionTools; |
| 4 | |
| 5 | use InvalidArgumentException; |
| 6 | use LogicException; |
| 7 | use MediaWiki\Extension\DiscussionTools\ThreadItem\ContentCommentItem; |
| 8 | use MediaWiki\Extension\DiscussionTools\ThreadItem\ContentThreadItem; |
| 9 | use MediaWiki\MediaWikiServices; |
| 10 | use UnexpectedValueException; |
| 11 | use Wikimedia\Assert\Assert; |
| 12 | use Wikimedia\Parsoid\DOM\Document; |
| 13 | use Wikimedia\Parsoid\DOM\DocumentFragment; |
| 14 | use Wikimedia\Parsoid\DOM\Element; |
| 15 | use Wikimedia\Parsoid\DOM\Node; |
| 16 | use Wikimedia\Parsoid\DOM\Text; |
| 17 | use Wikimedia\Parsoid\Utils\DOMCompat; |
| 18 | use Wikimedia\Parsoid\Utils\DOMUtils; |
| 19 | |
| 20 | class CommentModifier { |
| 21 | |
| 22 | private function __construct() { |
| 23 | } |
| 24 | |
| 25 | /** |
| 26 | * Add an attribute to a list item to remove pre-whitespace in Parsoid |
| 27 | */ |
| 28 | private static function whitespaceParsoidHack( Element $listItem ): void { |
| 29 | // HACK: Setting data-parsoid removes the whitespace after the list item, |
| 30 | // which makes nested lists work. |
| 31 | // This is undocumented behaviour and probably very fragile. |
| 32 | $listItem->setAttribute( 'data-parsoid', '{}' ); |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * Remove extra linebreaks from a wikitext string |
| 37 | */ |
| 38 | public static function sanitizeWikitextLinebreaks( string $wikitext ): string { |
| 39 | $wikitext = CommentUtils::htmlTrim( $wikitext ); |
| 40 | $wikitext = preg_replace( "/\r/", "\n", $wikitext ); |
| 41 | $wikitext = preg_replace( "/\n+/", "\n", $wikitext ); |
| 42 | return $wikitext; |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Given a comment and a reply link, add the reply link to its document's DOM tree, at the end of |
| 47 | * the comment. |
| 48 | * |
| 49 | * @param ContentCommentItem $comment |
| 50 | * @param Node $linkNode Reply link |
| 51 | */ |
| 52 | public static function addReplyLink( ContentCommentItem $comment, Node $linkNode ): void { |
| 53 | $target = $comment->getRange()->endContainer; |
| 54 | |
| 55 | // Insert the link before trailing whitespace. |
| 56 | // In the MediaWiki parser output, <ul>/<dl> nodes are preceded by a newline. Normally it isn't |
| 57 | // visible on the page. But if we insert an inline element (the reply link) after it, it becomes |
| 58 | // meaningful and gets rendered, which results in additional spacing before some reply links. |
| 59 | // Split the text node, so that we can insert the link before the trailing whitespace. |
| 60 | if ( $target instanceof Text ) { |
| 61 | preg_match( '/\s*$/', $target->nodeValue ?? '', $matches, PREG_OFFSET_CAPTURE ); |
| 62 | $byteOffset = $matches[0][1]; |
| 63 | $charOffset = mb_strlen( |
| 64 | substr( $target->nodeValue ?? '', 0, $byteOffset ) |
| 65 | ); |
| 66 | $target->splitText( $charOffset ); |
| 67 | } |
| 68 | |
| 69 | $target->parentNode->insertBefore( $linkNode, $target->nextSibling ); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Given a comment, add a list item to its document's DOM tree, inside of which a reply to said |
| 74 | * comment can be added. |
| 75 | * |
| 76 | * The DOM tree is suitably rearranged to ensure correct indentation level of the reply (wrapper |
| 77 | * nodes are added, and other nodes may be moved around). |
| 78 | * |
| 79 | * @param ContentThreadItem $comment |
| 80 | * @param string $replyIndentation Reply indentation syntax to use, one of: |
| 81 | * - 'invisible' (use `<dl><dd>` tags to output `:` in wikitext) |
| 82 | * - 'bullet' (use `<ul><li>` tags to output `*` in wikitext) |
| 83 | * @return Element |
| 84 | */ |
| 85 | public static function addListItem( ContentThreadItem $comment, string $replyIndentation ): Element { |
| 86 | $listTypeMap = [ |
| 87 | 'li' => 'ul', |
| 88 | 'dd' => 'dl' |
| 89 | ]; |
| 90 | |
| 91 | // 1. Start at given comment |
| 92 | // 2. Skip past all comments with level greater than the given |
| 93 | // (or in other words, all replies, and replies to replies, and so on) |
| 94 | // 3. Add comment with level of the given comment plus 1 |
| 95 | |
| 96 | $curComment = $comment; |
| 97 | while ( count( $curComment->getReplies() ) ) { |
| 98 | $replies = $curComment->getReplies(); |
| 99 | $curComment = end( $replies ); |
| 100 | } |
| 101 | |
| 102 | // Tag names for lists and items we're going to insert |
| 103 | if ( $replyIndentation === 'invisible' ) { |
| 104 | $itemType = 'dd'; |
| 105 | } elseif ( $replyIndentation === 'bullet' ) { |
| 106 | $itemType = 'li'; |
| 107 | } else { |
| 108 | throw new InvalidArgumentException( "Invalid reply indentation syntax '$replyIndentation'" ); |
| 109 | } |
| 110 | $listType = $listTypeMap[ $itemType ]; |
| 111 | |
| 112 | $desiredLevel = $comment->getLevel() + 1; |
| 113 | $target = $curComment->getRange()->endContainer; |
| 114 | |
| 115 | // target is a text node or an inline element at the end of a "paragraph" |
| 116 | // (not necessarily paragraph node). |
| 117 | // First, we need to find a block-level parent that we can mess with. |
| 118 | // If we can't find a surrounding list item or paragraph (e.g. maybe we're inside a table cell |
| 119 | // or something), take the parent node and hope for the best. |
| 120 | $parent = CommentUtils::closestElement( $target, [ 'li', 'dd', 'p' ] ) ?? |
| 121 | $target->parentNode; |
| 122 | while ( $target->parentNode !== $parent ) { |
| 123 | $target = $target->parentNode; |
| 124 | } |
| 125 | // parent is a list item or paragraph (hopefully) |
| 126 | // target is an inline node within it |
| 127 | |
| 128 | // If the comment is fully covered by some wrapper element, insert replies outside that wrapper. |
| 129 | // This will often just be a paragraph node (<p>), but it can be a <div> or <table> that serves |
| 130 | // as some kind of a fancy frame, which are often used for barnstars and announcements. |
| 131 | // @phan-suppress-next-line PhanTypeMismatchArgumentNullable |
| 132 | $excludedWrapper = CommentUtils::closestElement( $target, [ 'section' ] ) ?: |
| 133 | $curComment->getRootNode(); |
| 134 | $covered = CommentUtils::getFullyCoveredSiblings( $curComment, $excludedWrapper ); |
| 135 | if ( $curComment->getLevel() === 1 && $covered ) { |
| 136 | $target = end( $covered ); |
| 137 | $parent = $target->parentNode; |
| 138 | } |
| 139 | |
| 140 | // If the comment is in a transclusion, insert replies after the transclusion. (T313100) |
| 141 | // This method should never be called in cases where that would be a bad idea. |
| 142 | // @phan-suppress-next-line PhanTypeMismatchArgumentNullable |
| 143 | $transclusionNode = CommentUtils::getTranscludedFromElement( $target ); |
| 144 | if ( $transclusionNode ) { |
| 145 | while ( |
| 146 | ( $nextSibling = $transclusionNode->nextSibling ) && |
| 147 | $nextSibling instanceof Element && |
| 148 | $nextSibling->getAttribute( 'about' ) === $transclusionNode->getAttribute( 'about' ) |
| 149 | ) { |
| 150 | $transclusionNode = $nextSibling; |
| 151 | } |
| 152 | $target = $transclusionNode; |
| 153 | $parent = $target->parentNode; |
| 154 | } |
| 155 | |
| 156 | // If we can't insert a list directly inside this element, insert after it. |
| 157 | // The covered wrapper check above handles most cases, but we still need this sometimes, such as: |
| 158 | // * If the comment starts in the middle of a list, then ends with an unindented p/pre, the |
| 159 | // wrapper check doesn't adjust the parent |
| 160 | // * If the comment consists of multiple list items (starting with a <dt>, so that the comment is |
| 161 | // considered to be unindented, that is level === 1), but not all of them, the wrapper check |
| 162 | // adjusts the parent to be the list, and the rest of the algorithm doesn't handle that well |
| 163 | if ( |
| 164 | strtolower( $parent->tagName ) === 'p' || |
| 165 | strtolower( $parent->tagName ) === 'pre' || |
| 166 | strtolower( $parent->tagName ) === 'ul' || |
| 167 | strtolower( $parent->tagName ) === 'dl' |
| 168 | ) { |
| 169 | $parent = $parent->parentNode; |
| 170 | $target = $target->parentNode; |
| 171 | } |
| 172 | |
| 173 | Assert::precondition( $target !== null, 'We have not stepped outside the document' ); |
| 174 | // Instead of just using $curComment->getLevel(), consider indentation of lists within the |
| 175 | // comment (T252702) |
| 176 | $curLevel = CommentUtils::getIndentLevel( $target, $curComment->getRootNode() ) + 1; |
| 177 | |
| 178 | $item = null; |
| 179 | if ( $desiredLevel === 1 ) { |
| 180 | // Special handling for top-level comments |
| 181 | // We use section=new API for adding them in PHP, so this should never happen |
| 182 | throw new UnexpectedValueException( "Can't add a top-level comment" ); |
| 183 | |
| 184 | } elseif ( $curLevel < $desiredLevel ) { |
| 185 | // Insert more lists after the target to increase nesting. |
| 186 | |
| 187 | // Parsoid puts HTML comments (and other "rendering-transparent nodes", e.g. category links) |
| 188 | // which appear at the end of the line in wikitext outside the paragraph, |
| 189 | // but we usually shouldn't insert replies between the paragraph and such comments. (T257651) |
| 190 | // Skip over comments and whitespace, but only update target when skipping past comments. |
| 191 | $pointer = $target; |
| 192 | while ( |
| 193 | $pointer->nextSibling && ( |
| 194 | CommentUtils::isRenderingTransparentNode( $pointer->nextSibling ) || |
| 195 | ( |
| 196 | $pointer->nextSibling instanceof Text && |
| 197 | CommentUtils::htmlTrim( $pointer->nextSibling->nodeValue ?? '' ) === '' && |
| 198 | // If more that two lines of whitespace are detected, the following HTML |
| 199 | // comments are not considered to be part of the reply (T264026) |
| 200 | !preg_match( '/(\r?\n){2,}/', $pointer->nextSibling->nodeValue ?? '' ) |
| 201 | ) |
| 202 | ) |
| 203 | ) { |
| 204 | $pointer = $pointer->nextSibling; |
| 205 | if ( CommentUtils::isRenderingTransparentNode( $pointer ) ) { |
| 206 | $target = $pointer; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | // Insert required number of wrappers |
| 211 | while ( $curLevel < $desiredLevel ) { |
| 212 | $list = $target->ownerDocument->createElement( $listType ); |
| 213 | // Setting modified would only be needed for removeAddedListItem, |
| 214 | // which isn't needed on the server |
| 215 | // $list->setAttribute( 'dt-modified', 'new' ); |
| 216 | $item = $target->ownerDocument->createElement( $itemType ); |
| 217 | // $item->setAttribute( 'dt-modified', 'new' ); |
| 218 | |
| 219 | $parent->insertBefore( $list, $target->nextSibling ); |
| 220 | $list->appendChild( $item ); |
| 221 | |
| 222 | $target = $item; |
| 223 | $parent = $list; |
| 224 | $curLevel++; |
| 225 | } |
| 226 | } else { |
| 227 | // Split the ancestor nodes after the target to decrease nesting. |
| 228 | |
| 229 | do { |
| 230 | if ( !$target || !$parent ) { |
| 231 | throw new LogicException( 'Can not decrease nesting any more' ); |
| 232 | } |
| 233 | |
| 234 | // If target is the last child of its parent, no need to split it |
| 235 | if ( $target->nextSibling ) { |
| 236 | // Create new identical node after the parent |
| 237 | $newNode = $parent->cloneNode( false ); |
| 238 | // $parent->setAttribute( 'dt-modified', 'split' ); |
| 239 | $parent->parentNode->insertBefore( $newNode, $parent->nextSibling ); |
| 240 | |
| 241 | // Move nodes following target to the new node |
| 242 | while ( $target->nextSibling ) { |
| 243 | $newNode->appendChild( $target->nextSibling ); |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | $target = $parent; |
| 248 | $parent = $parent->parentNode; |
| 249 | |
| 250 | // Decrease nesting level if we escaped outside of a list |
| 251 | if ( isset( $listTypeMap[ strtolower( $target->tagName ) ] ) ) { |
| 252 | $curLevel--; |
| 253 | } |
| 254 | } while ( $curLevel >= $desiredLevel ); |
| 255 | |
| 256 | // parent is now a list, target is a list item |
| 257 | if ( $itemType === strtolower( $target->tagName ) ) { |
| 258 | $item = $target->ownerDocument->createElement( $itemType ); |
| 259 | // $item->setAttribute( 'dt-modified', 'new' ); |
| 260 | $parent->insertBefore( $item, $target->nextSibling ); |
| 261 | |
| 262 | } else { |
| 263 | // This is the wrong type of list, split it one more time |
| 264 | |
| 265 | // If target is the last child of its parent, no need to split it |
| 266 | if ( $target->nextSibling ) { |
| 267 | // Create new identical node after the parent |
| 268 | $newNode = $parent->cloneNode( false ); |
| 269 | // $parent->setAttribute( 'dt-modified', 'split' ); |
| 270 | $parent->parentNode->insertBefore( $newNode, $parent->nextSibling ); |
| 271 | |
| 272 | // Move nodes following target to the new node |
| 273 | while ( $target->nextSibling ) { |
| 274 | $newNode->appendChild( $target->nextSibling ); |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | $target = $parent; |
| 279 | $parent = $parent->parentNode; |
| 280 | |
| 281 | // Insert a list of the right type in the middle |
| 282 | $list = $target->ownerDocument->createElement( $listType ); |
| 283 | // Setting modified would only be needed for removeAddedListItem, |
| 284 | // which isn't needed on the server |
| 285 | // $list->setAttribute( 'dt-modified', 'new' ); |
| 286 | $item = $target->ownerDocument->createElement( $itemType ); |
| 287 | // $item->setAttribute( 'dt-modified', 'new' ); |
| 288 | |
| 289 | $parent->insertBefore( $list, $target->nextSibling ); |
| 290 | $list->appendChild( $item ); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | if ( $item === null ) { |
| 295 | throw new LogicException( 'No item found' ); |
| 296 | } |
| 297 | |
| 298 | return $item; |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * Check all elements in a node list are of a given type |
| 303 | * |
| 304 | * Also returns false if there are no elements in the list |
| 305 | * |
| 306 | * @param iterable<Node> $nodes Node list |
| 307 | * @param string $type Element type |
| 308 | * @return bool |
| 309 | */ |
| 310 | private static function allOfType( iterable $nodes, string $type ): bool { |
| 311 | $hasElements = false; |
| 312 | foreach ( $nodes as $node ) { |
| 313 | if ( $node instanceof Element ) { |
| 314 | if ( strtolower( $node->tagName ) !== strtolower( $type ) ) { |
| 315 | return false; |
| 316 | } |
| 317 | $hasElements = true; |
| 318 | } |
| 319 | } |
| 320 | return $hasElements; |
| 321 | } |
| 322 | |
| 323 | /** |
| 324 | * Remove unnecessary list wrappers from a comment fragment |
| 325 | * |
| 326 | * TODO: Implement this in JS if required |
| 327 | * |
| 328 | * @param DocumentFragment $fragment Fragment |
| 329 | */ |
| 330 | public static function unwrapFragment( DocumentFragment $fragment ): void { |
| 331 | // Wrap orphaned list items |
| 332 | $list = null; |
| 333 | if ( static::allOfType( $fragment->childNodes, 'dd' ) ) { |
| 334 | $list = $fragment->ownerDocument->createElement( 'dl' ); |
| 335 | } elseif ( static::allOfType( $fragment->childNodes, 'li' ) ) { |
| 336 | $list = $fragment->ownerDocument->createElement( 'ul' ); |
| 337 | } |
| 338 | if ( $list ) { |
| 339 | while ( $fragment->firstChild ) { |
| 340 | $list->appendChild( $fragment->firstChild ); |
| 341 | } |
| 342 | $fragment->appendChild( $list ); |
| 343 | } |
| 344 | |
| 345 | // If all child nodes are lists of the same type, unwrap them |
| 346 | while ( |
| 347 | static::allOfType( $fragment->childNodes, 'dl' ) || |
| 348 | static::allOfType( $fragment->childNodes, 'ul' ) || |
| 349 | static::allOfType( $fragment->childNodes, 'ol' ) || |
| 350 | ( |
| 351 | // Or if the comment starts with a bullet followed by indents |
| 352 | count( $fragment->childNodes ) > 1 && |
| 353 | static::allOfType( [ $fragment->childNodes[0] ], 'ul' ) && |
| 354 | static::allOfType( array_slice( iterator_to_array( $fragment->childNodes ), 1 ), 'dl' ) |
| 355 | ) |
| 356 | ) { |
| 357 | // Do not iterate over childNodes while we're modifying it |
| 358 | $childNodeList = iterator_to_array( $fragment->childNodes ); |
| 359 | foreach ( $childNodeList as $node ) { |
| 360 | static::unwrapList( $node, $fragment ); |
| 361 | } |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | // removeAddedListItem is only needed in the client |
| 366 | |
| 367 | /** |
| 368 | * Unwrap a top level list, converting list item text to paragraphs |
| 369 | * |
| 370 | * Assumes that the list has a parent node, or is a root child in the provided |
| 371 | * document fragment. |
| 372 | * |
| 373 | * @param Node $list DOM node, will be wrapped if it is a list element (dl/ol/ul) |
| 374 | * @param DocumentFragment|null $fragment Containing document fragment if list has no parent |
| 375 | */ |
| 376 | public static function unwrapList( Node $list, ?DocumentFragment $fragment = null ): void { |
| 377 | if ( !( |
| 378 | $list instanceof Element && ( |
| 379 | strtolower( $list->tagName ) === 'dl' || |
| 380 | strtolower( $list->tagName ) === 'ol' || |
| 381 | strtolower( $list->tagName ) === 'ul' |
| 382 | ) |
| 383 | ) ) { |
| 384 | // Not a list, leave alone (e.g. auto-generated ref block) |
| 385 | return; |
| 386 | } |
| 387 | |
| 388 | // If the whole list is a template return it unmodified (T253150) |
| 389 | if ( CommentUtils::getTranscludedFromElement( $list ) ) { |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | $doc = $list->ownerDocument; |
| 394 | $container = $fragment ?: $list->parentNode; |
| 395 | $referenceNode = $list; |
| 396 | while ( $list->firstChild ) { |
| 397 | if ( $list->firstChild instanceof Element ) { |
| 398 | // Move <dd> contents to <p> |
| 399 | $p = $doc->createElement( 'p' ); |
| 400 | while ( $list->firstChild->firstChild ) { |
| 401 | // If contents is a block element, place outside the paragraph |
| 402 | // and start a new paragraph after |
| 403 | if ( CommentUtils::isBlockElement( $list->firstChild->firstChild ) ) { |
| 404 | if ( $p->firstChild ) { |
| 405 | $insertBefore = $referenceNode->nextSibling; |
| 406 | $referenceNode = $p; |
| 407 | $container->insertBefore( $p, $insertBefore ); |
| 408 | } |
| 409 | $insertBefore = $referenceNode->nextSibling; |
| 410 | $referenceNode = $list->firstChild->firstChild; |
| 411 | $container->insertBefore( $list->firstChild->firstChild, $insertBefore ); |
| 412 | $p = $doc->createElement( 'p' ); |
| 413 | } else { |
| 414 | $p->appendChild( $list->firstChild->firstChild ); |
| 415 | } |
| 416 | } |
| 417 | if ( $p->firstChild ) { |
| 418 | $insertBefore = $referenceNode->nextSibling; |
| 419 | $referenceNode = $p; |
| 420 | $container->insertBefore( $p, $insertBefore ); |
| 421 | } |
| 422 | $list->removeChild( $list->firstChild ); |
| 423 | } else { |
| 424 | // Text node / comment node, probably empty |
| 425 | $insertBefore = $referenceNode->nextSibling; |
| 426 | $referenceNode = $list->firstChild; |
| 427 | $container->insertBefore( $list->firstChild, $insertBefore ); |
| 428 | } |
| 429 | } |
| 430 | $container->removeChild( $list ); |
| 431 | } |
| 432 | |
| 433 | /** |
| 434 | * Add another list item after the given one. |
| 435 | */ |
| 436 | public static function addSiblingListItem( Element $previousItem ): Element { |
| 437 | $listItem = $previousItem->ownerDocument->createElement( $previousItem->tagName ); |
| 438 | $previousItem->parentNode->insertBefore( $listItem, $previousItem->nextSibling ); |
| 439 | return $listItem; |
| 440 | } |
| 441 | |
| 442 | /** |
| 443 | * Create an element that will convert to the provided wikitext |
| 444 | */ |
| 445 | public static function createWikitextNode( Document $doc, string $wikitext ): Element { |
| 446 | $span = $doc->createElement( 'span' ); |
| 447 | |
| 448 | $span->setAttribute( 'typeof', 'mw:Transclusion' ); |
| 449 | $span->setAttribute( 'data-mw', json_encode( [ 'parts' => [ $wikitext ] ] ) ); |
| 450 | |
| 451 | return $span; |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * Check if an element created by ::createWikitextNode() starts with list item markup. |
| 456 | */ |
| 457 | private static function isWikitextNodeListItem( Element $node ): bool { |
| 458 | $dataMw = json_decode( $node->getAttribute( 'data-mw' ) ?? '', true ); |
| 459 | $wikitextLine = $dataMw['parts'][0] ?? null; |
| 460 | return $wikitextLine && is_string( $wikitextLine ) && |
| 461 | in_array( $wikitextLine[0], [ '*', '#', ':', ';' ], true ); |
| 462 | } |
| 463 | |
| 464 | /** |
| 465 | * Append a user signature to the comment in the container. |
| 466 | */ |
| 467 | public static function appendSignature( DocumentFragment $container, string $signature ): void { |
| 468 | $doc = $container->ownerDocument; |
| 469 | |
| 470 | // If the last node isn't a paragraph (e.g. it's a list created in visual mode), |
| 471 | // or looks like a list item created in wikitext mode (T263217), |
| 472 | // then add another paragraph to contain the signature. |
| 473 | $wrapperNode = $container->lastChild; |
| 474 | if ( |
| 475 | !( $wrapperNode instanceof Element ) || |
| 476 | strtolower( $wrapperNode->tagName ) !== 'p' || |
| 477 | ( |
| 478 | // This would be easier to check in prepareWikitextReply(), but that would result |
| 479 | // in an empty list item being added at the end if we don't need to add a signature. |
| 480 | ( $wtNode = $wrapperNode->lastChild ) && |
| 481 | $wtNode instanceof Element && |
| 482 | static::isWikitextNodeListItem( $wtNode ) |
| 483 | ) |
| 484 | ) { |
| 485 | $container->appendChild( $doc->createElement( 'p' ) ); |
| 486 | } |
| 487 | // If the last node is empty, trim the signature to prevent leading whitespace triggering |
| 488 | // preformatted text (T269188, T276612) |
| 489 | if ( !$container->lastChild->firstChild ) { |
| 490 | $signature = ltrim( $signature, ' ' ); |
| 491 | } |
| 492 | // Sign the last line |
| 493 | $container->lastChild->appendChild( |
| 494 | static::createWikitextNode( |
| 495 | $doc, |
| 496 | $signature |
| 497 | ) |
| 498 | ); |
| 499 | } |
| 500 | |
| 501 | /** |
| 502 | * Append a user signature to the comment in the provided wikitext. |
| 503 | */ |
| 504 | public static function appendSignatureWikitext( string $wikitext, string $signature ): string { |
| 505 | $wikitext = CommentUtils::htmlTrim( $wikitext ); |
| 506 | |
| 507 | $lines = explode( "\n", $wikitext ); |
| 508 | $lastLine = end( $lines ); |
| 509 | |
| 510 | // If last line looks like a list item, add an empty line afterwards for the signature (T263217) |
| 511 | if ( $lastLine && in_array( $lastLine[0], [ '*', '#', ':', ';' ], true ) ) { |
| 512 | $wikitext .= "\n"; |
| 513 | // Trim the signature to prevent leading whitespace triggering preformatted text (T269188, T276612) |
| 514 | $signature = ltrim( $signature, ' ' ); |
| 515 | } |
| 516 | |
| 517 | return $wikitext . $signature; |
| 518 | } |
| 519 | |
| 520 | /** |
| 521 | * Add a reply to a specific comment |
| 522 | * |
| 523 | * @param ContentThreadItem $comment Comment being replied to |
| 524 | * @param DocumentFragment $container Container of comment DOM nodes |
| 525 | */ |
| 526 | public static function addReply( ContentThreadItem $comment, DocumentFragment $container ): void { |
| 527 | $services = MediaWikiServices::getInstance(); |
| 528 | $dtConfig = $services->getConfigFactory()->makeConfig( 'discussiontools' ); |
| 529 | $replyIndentation = $dtConfig->get( 'DiscussionToolsReplyIndentation' ); |
| 530 | |
| 531 | $newParsoidItem = null; |
| 532 | // Transfer comment DOM to Parsoid DOM |
| 533 | // Wrap every root node of the document in a new list item (dd/li). |
| 534 | // In wikitext mode every root node is a paragraph. |
| 535 | // In visual mode the editor takes care of preventing problematic nodes |
| 536 | // like <table> or <h2> from ever occurring in the comment. |
| 537 | while ( $container->childNodes->length ) { |
| 538 | if ( !$newParsoidItem ) { |
| 539 | $newParsoidItem = static::addListItem( $comment, $replyIndentation ); |
| 540 | } else { |
| 541 | $newParsoidItem = static::addSiblingListItem( $newParsoidItem ); |
| 542 | } |
| 543 | |
| 544 | // Suppress space after the indentation character to support nested lists (T238218). |
| 545 | // By request from the community, avoid this if possible after bullet indentation (T259864). |
| 546 | if ( !( |
| 547 | $replyIndentation === 'bullet' && |
| 548 | ( $wtNode = $container->firstChild->lastChild ) && |
| 549 | $wtNode instanceof Element && |
| 550 | !static::isWikitextNodeListItem( $wtNode ) |
| 551 | ) ) { |
| 552 | static::whitespaceParsoidHack( $newParsoidItem ); |
| 553 | } |
| 554 | |
| 555 | $newParsoidItem->appendChild( $container->firstChild ); |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | /** |
| 560 | * Transfer comment DOM nodes into a list node, as if adding a reply, but without requiring a |
| 561 | * ThreadItem. |
| 562 | * |
| 563 | * @param DocumentFragment $container Container of comment DOM nodes |
| 564 | * @return Element $node List node |
| 565 | */ |
| 566 | public static function transferReply( DocumentFragment $container ): Element { |
| 567 | $services = MediaWikiServices::getInstance(); |
| 568 | $dtConfig = $services->getConfigFactory()->makeConfig( 'discussiontools' ); |
| 569 | $replyIndentation = $dtConfig->get( 'DiscussionToolsReplyIndentation' ); |
| 570 | |
| 571 | $doc = $container->ownerDocument; |
| 572 | |
| 573 | // Like addReply(), but we make our own list |
| 574 | $list = $doc->createElement( $replyIndentation === 'invisible' ? 'dl' : 'ul' ); |
| 575 | while ( $container->childNodes->length ) { |
| 576 | $item = $doc->createElement( $replyIndentation === 'invisible' ? 'dd' : 'li' ); |
| 577 | // Suppress space after the indentation character to support nested lists (T238218). |
| 578 | // By request from the community, avoid this if possible after bullet indentation (T259864). |
| 579 | if ( !( |
| 580 | $replyIndentation === 'bullet' && |
| 581 | ( $wtNode = $container->firstChild->lastChild ) && |
| 582 | $wtNode instanceof Element && |
| 583 | !static::isWikitextNodeListItem( $wtNode ) |
| 584 | ) ) { |
| 585 | static::whitespaceParsoidHack( $item ); |
| 586 | } |
| 587 | $item->appendChild( $container->firstChild ); |
| 588 | $list->appendChild( $item ); |
| 589 | } |
| 590 | return $list; |
| 591 | } |
| 592 | |
| 593 | /** |
| 594 | * Create a container of comment DOM nodes from wikitext |
| 595 | * |
| 596 | * @param Document $doc Document where the DOM nodes will be inserted |
| 597 | * @param string $wikitext |
| 598 | * @return DocumentFragment DOM nodes |
| 599 | */ |
| 600 | public static function prepareWikitextReply( Document $doc, string $wikitext ): DocumentFragment { |
| 601 | $container = $doc->createDocumentFragment(); |
| 602 | |
| 603 | $wikitext = static::sanitizeWikitextLinebreaks( $wikitext ); |
| 604 | |
| 605 | $lines = explode( "\n", $wikitext ); |
| 606 | foreach ( $lines as $line ) { |
| 607 | $p = $doc->createElement( 'p' ); |
| 608 | $p->appendChild( static::createWikitextNode( $doc, $line ) ); |
| 609 | $container->appendChild( $p ); |
| 610 | } |
| 611 | |
| 612 | return $container; |
| 613 | } |
| 614 | |
| 615 | /** |
| 616 | * Create a container of comment DOM nodes from HTML |
| 617 | * |
| 618 | * @param Document $doc Document where the DOM nodes will be inserted |
| 619 | * @param string $html |
| 620 | * @return DocumentFragment DOM nodes |
| 621 | */ |
| 622 | public static function prepareHtmlReply( Document $doc, string $html ): DocumentFragment { |
| 623 | $container = DOMUtils::parseHTMLToFragment( $doc, $html ); |
| 624 | |
| 625 | // Remove empty lines |
| 626 | // This should really be anything that serializes to empty string in wikitext, |
| 627 | // (e.g. <h2></h2>) but this will catch most cases |
| 628 | // Create a non-live child node list, so we don't have to worry about it changing |
| 629 | // as nodes are removed. |
| 630 | $childNodeList = iterator_to_array( $container->childNodes ); |
| 631 | foreach ( $childNodeList as $node ) { |
| 632 | if ( ( |
| 633 | $node instanceof Text && |
| 634 | CommentUtils::htmlTrim( $node->nodeValue ?? '' ) === '' |
| 635 | ) || ( |
| 636 | $node instanceof Element && |
| 637 | strtolower( $node->tagName ) === 'p' && |
| 638 | CommentUtils::htmlTrim( DOMCompat::getInnerHTML( $node ) ) === '' |
| 639 | ) ) { |
| 640 | $container->removeChild( $node ); |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | return $container; |
| 645 | } |
| 646 | |
| 647 | /** |
| 648 | * Add a reply in the DOM to a comment using wikitext. |
| 649 | * |
| 650 | * @param ContentCommentItem $comment Comment being replied to |
| 651 | * @param string $wikitext |
| 652 | * @param string|null $signature |
| 653 | */ |
| 654 | public static function addWikitextReply( |
| 655 | ContentCommentItem $comment, string $wikitext, string $signature = null |
| 656 | ): void { |
| 657 | $doc = $comment->getRange()->endContainer->ownerDocument; |
| 658 | $container = static::prepareWikitextReply( $doc, $wikitext ); |
| 659 | if ( $signature !== null ) { |
| 660 | static::appendSignature( $container, $signature ); |
| 661 | } |
| 662 | static::addReply( $comment, $container ); |
| 663 | } |
| 664 | |
| 665 | /** |
| 666 | * Add a reply in the DOM to a comment using HTML. |
| 667 | * |
| 668 | * @param ContentCommentItem $comment Comment being replied to |
| 669 | * @param string $html |
| 670 | * @param string|null $signature |
| 671 | */ |
| 672 | public static function addHtmlReply( |
| 673 | ContentCommentItem $comment, string $html, string $signature = null |
| 674 | ): void { |
| 675 | $doc = $comment->getRange()->endContainer->ownerDocument; |
| 676 | $container = static::prepareHtmlReply( $doc, $html ); |
| 677 | if ( $signature !== null ) { |
| 678 | static::appendSignature( $container, $signature ); |
| 679 | } |
| 680 | static::addReply( $comment, $container ); |
| 681 | } |
| 682 | } |