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<?php declare( strict_types = 1 ); namespace Wikimedia\Parsoid\Wt2Html\PP\Processors; use SplObjectStorage; use Wikimedia\Parsoid\Core\DomSourceRange; use Wikimedia\Parsoid\DOM\Document; use Wikimedia\Parsoid\DOM\Element; use Wikimedia\Parsoid\DOM\Node; use Wikimedia\Parsoid\NodeData\DataParsoid; use Wikimedia\Parsoid\NodeData\TempData; use Wikimedia\Parsoid\NodeData\TemplateInfo; use Wikimedia\Parsoid\Utils\DOMCompat; use Wikimedia\Parsoid\Utils\DOMDataUtils; use Wikimedia\Parsoid\Utils\DOMUtils; use Wikimedia\Parsoid\Utils\WTUtils; use Wikimedia\Parsoid\Wt2Html\Frame; class AnnotationDOMRangeBuilder extends DOMRangeBuilder { /** @var MigrateTrailingNLs / private $migrateTrailingNls; /* * AnnotationDOMRangeBuilder constructor. * @param Document $document * @param Frame $frame / public function __construct( Document $document, Frame $frame ) { parent::__construct( $document, $frame ); $this->traceType = "annwrap"; $this->migrateTrailingNls = new MigrateTrailingNLs(); } /* * @param array $annRanges / private function wrapAnnotationsInTree( array $annRanges ): void { foreach ( $annRanges as $range ) { if ( DOMUtils::isFosterablePosition( $range->start ) ) { $newStart = $range->start; while ( DOMUtils::isFosterablePosition( $newStart ) ) { $newStart = $newStart->parentNode; } $range->start = $newStart; } if ( DOMUtils::isFosterablePosition( $range->end ) ) { $newEnd = $range->end; while ( DOMUtils::isFosterablePosition( $newEnd ) ) { $newEnd = $newEnd->parentNode; } $range->end = $newEnd; } if ( $range->startElem !== $range->start ) { $this->moveRangeStart( $range, $range->start ); } if ( $range->endElem !== $range->end ) { $this->moveRangeEnd( $range, $range->end ); } } } /* * Makes the DOM range between $range->startElem and $range->endElem uneditable by wrapping * it into a <div> (for block ranges) or <span> (for inline ranges) with the mw:ExtendedAnnRange * type. * @param DOMRangeInfo $range * @param int\|null $actualRangeStart * @param int\|null $actualRangeEnd / private function makeUneditable( DOMRangeInfo $range, ?int $actualRangeStart, ?int $actualRangeEnd ) { $parent = $range->startElem->parentNode; $node = $range->startElem; $inline = true; while ( $node !== $range->endElem ) { $node = $node->nextSibling; if ( $node instanceof Element && DOMUtils::hasBlockTag( $node ) ) { $inline = false; break; } } $wrap = $parent->ownerDocument->createElement( $inline ? 'span' : 'div' ); $parent->insertBefore( $wrap, $range->startElem ); $toMove = $range->startElem; while ( $toMove !== $range->endElem ) { $nextToMove = $toMove->nextSibling; $wrap->appendChild( $toMove ); $toMove = $nextToMove; } $wrap->appendChild( $toMove ); $wrap->setAttribute( "typeof", "mw:ExtendedAnnRange" ); // Ensure template continuity is not broken $about = $range->startElem->getAttribute( "about" ); if ( $about ) { $wrap->setAttribute( "about", $about ); } $dp = new DataParsoid(); $dp->autoInsertedStart = true; $dp->autoInsertedEnd = true; $dp->dsr = new DomSourceRange( $actualRangeStart, $actualRangeEnd, 0, 0 ); DOMDataUtils::setDataParsoid( $wrap, $dp ); $openRanges = []; } /* * Moves the start of the range to the designated node * @param DOMRangeInfo $range the range to modify * @param Node $node the new start of the range / private function moveRangeStart( DOMRangeInfo $range, Node $node ): void { $startMeta = $range->startElem; $startDataParsoid = DOMDataUtils::getDataParsoid( $startMeta ); if ( $node instanceof Element ) { if ( DOMCompat::nodeName( $node ) === "p" && $node->firstChild === $startMeta ) { // If the first child of "p" is the meta, and it gets moved, then it got mistakenly // pulled inside the paragraph, and the paragraph dsr that gets computed includes // it - which may lead to the tag getting duplicated on roundtrip. Hence, we // adjust the dsr of the paragraph in that case. We also don't consider the meta // tag to have been moved in that case. $pDataParsoid = DOMDataUtils::getDataParsoid( $node ); $pDataParsoid->dsr->start = $startDataParsoid->dsr->end; } else { $startDataParsoid->wasMoved = true; } } $node = $this->getStartConsideringFosteredContent( $node ); $node->parentNode->insertBefore( $startMeta, $node ); if ( $node instanceof Element ) { // Ensure template continuity is not broken $about = $node->getAttribute( "about" ); if ( $about ) { $startMeta->setAttribute( "about", $about ); } } $range->start = $startMeta; } /* * Moves the start of the range to the designated node * @param DOMRangeInfo $range the range to modify * @param Node $node the new start of the range / private function moveRangeEnd( DOMRangeInfo $range, Node $node ): void { $endMeta = $range->endElem; $endDataParsoid = DOMDataUtils::getDataParsoid( $endMeta ); if ( $node instanceof Element ) { $endMetaWasLastChild = $node->lastChild === $endMeta; // Migrate $endMeta and ensure template continuity is not broken $node->parentNode->insertBefore( $endMeta, $node->nextSibling ); $about = $node->getAttribute( "about" ); if ( $about ) { $endMeta->setAttribute( "about", $about ); } if ( ( DOMCompat::nodeName( $node ) === "p" ) && $endMetaWasLastChild ) { // If the last child of "p" is the meta, and it gets moved, then it got mistakenly // pulled inside the paragraph, and the paragraph dsr that gets computed includes // it - which may lead to the tag getting duplicated on roundtrip. Hence, we // adjust the dsr of the paragraph in that case. We also don't consider the meta // tag to have been moved in that case. $pDataParsoid = DOMDataUtils::getDataParsoid( $node ); $pDataParsoid->dsr->end = $endDataParsoid->dsr->start; $prevLength = strlen( $node->textContent ?? '' ); $this->migrateTrailingNls->doMigrateTrailingNLs( $node, $this->env ); $newLength = strlen( $node->textContent ?? '' ); if ( $prevLength != $newLength ) { $pDataParsoid->dsr->end -= ( $prevLength - $newLength ); } } else { $endDataParsoid->wasMoved = true; DOMDataUtils::setDataParsoid( $endMeta, $endDataParsoid ); } } $range->end = $endMeta; } /* * Returns whether one of the ends of the range has been moved, which corresponds to an extended * range. * @param DOMRangeInfo $range * @return bool / private function isExtended( DOMRangeInfo $range ): bool { if ( $range->extendedByOverlapMerge ) { return true; } $startDataParsoid = DOMDataUtils::getDataParsoid( $range->startElem ); $endDataParsoid = DOMDataUtils::getDataParsoid( $range->endElem ); return ( $startDataParsoid->wasMoved ?? false ) \|\| ( $endDataParsoid->wasMoved ?? false ); } /* * Sets the data-mw attribute for meta tags of the provided range * @param DOMRangeInfo $range range whose start and end element needs to be to modified * @param bool $isExtended whether the range got extended / private function setMetaDataMwForRange( DOMRangeInfo $range, bool $isExtended ): void { $startDataMw = DOMDataUtils::getDataMw( $range->startElem ); $endDataMw = DOMDataUtils::getDataMw( $range->endElem ); $startDataMw->extendedRange = $isExtended; $startDataMw->wtOffsets = DOMDataUtils::getDataParsoid( $range->startElem )->tsr; $endDataMw->wtOffsets = DOMDataUtils::getDataParsoid( $range->endElem )->tsr; unset( $endDataMw->rangeId ); } /* * Returns the meta type of the element if it exists and matches the type expected by the * current class, null otherwise * @param Element $elem the element to check * @return string\|null / protected function matchMetaType( Element $elem ): ?string { // for this class we're interested in the annotation type return WTUtils::matchAnnotationMeta( $elem ); } /* @inheritDoc / protected function verifyTplInfoExpectation( ?TemplateInfo $templateInfo, TempData $tmp ): void { // Annotations aren't templates. Nothing to do. } /* * Returns the range ID of a node - in the case of annotations, the "rangeId" property * of its "data-mw" attribute. * @param Element $node * @return string / protected function getRangeId( Element $node ): string { return DOMDataUtils::getDataMw( $node )->rangeId ?? ''; } /* * @inheritDoc / protected function updateDSRForFirstRangeNode( Element $target, Element $source ): void { // nop } /* * @param Node $root */ public function execute( Node $root ): void { try { $annRanges = $this->findWrappableMetaRanges( $root ); } catch ( RangeBuilderException $e ) { $this->env->log( 'warn', 'The annotation ranges could not be fully detected. ' . ' Annotation processing cancelled. ' ); return; } $rangesByType = []; foreach ( $annRanges as $range ) { $annType = WTUtils::extractAnnotationType( $range->startElem ); if ( !isset( $rangesByType[$annType] ) ) { $rangesByType[$annType] = []; } $rangesByType[$annType][] = $range; } foreach ( $rangesByType as $singleTypeRange ) { $this->nodeRanges = new SplObjectStorage; $topRanges = $this->findTopLevelNonOverlappingRanges( $root, $singleTypeRange ); $this->wrapAnnotationsInTree( $topRanges ); foreach ( $topRanges as $range ) { $actualRangeStart = DOMDataUtils::getDataParsoid( $range->start )->dsr->start; $actualRangeEnd = DOMDataUtils::getDataParsoid( $range->end )->dsr->end; $isExtended = $this->isExtended( $range ); if ( $isExtended ) { $this->makeUneditable( $range, $actualRangeStart, $actualRangeEnd ); } $this->setMetaDataMwForRange( $range, $isExtended ); } } } }

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