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| 1 | <?php |
| 2 | declare( strict_types = 1 ); |
| 3 | |
| 4 | namespace Wikimedia\Parsoid\Html2Wt\DOMHandlers; |
| 5 | |
| 6 | use Wikimedia\Parsoid\DOM\Element; |
| 7 | use Wikimedia\Parsoid\DOM\Node; |
| 8 | use Wikimedia\Parsoid\Html2Wt\SerializerState; |
| 9 | use Wikimedia\Parsoid\Utils\DiffDOMUtils; |
| 10 | use Wikimedia\Parsoid\Utils\WTUtils; |
| 11 | |
| 12 | class HeadingHandler extends DOMHandler { |
| 13 | |
| 14 | /** @var string Heading open/close wikitext (e.g. '===') */ |
| 15 | public $headingWT; |
| 16 | |
| 17 | /** |
| 18 | * @param string $headingWT Heading open/close wikitext (e.g. '===') |
| 19 | */ |
| 20 | public function __construct( string $headingWT ) { |
| 21 | parent::__construct( true ); |
| 22 | $this->headingWT = $headingWT; |
| 23 | } |
| 24 | |
| 25 | /** @inheritDoc */ |
| 26 | public function handle( |
| 27 | Element $node, SerializerState $state, bool $wrapperUnmodified = false |
| 28 | ): ?Node { |
| 29 | // For new elements, for prettier wikitext serialization, |
| 30 | // emit a space after the last '=' char. |
| 31 | $space = $this->getLeadingSpace( $state, $node, ' ' ); |
| 32 | $state->emitChunk( $this->headingWT . $space, $node ); |
| 33 | $state->singleLineContext->enforce(); |
| 34 | |
| 35 | if ( $node->hasChildNodes() ) { |
| 36 | $state->serializeChildren( $node, null, DiffDOMUtils::firstNonDeletedChild( $node ) ); |
| 37 | } else { |
| 38 | // Deal with empty headings |
| 39 | $state->emitChunk( '<nowiki/>', $node ); |
| 40 | } |
| 41 | |
| 42 | // For new elements, for prettier wikitext serialization, |
| 43 | // emit a space before the first '=' char. |
| 44 | $space = $this->getTrailingSpace( $state, $node, ' ' ); |
| 45 | $state->emitChunk( $space . $this->headingWT, $node ); // Why emitChunk here?? |
| 46 | $state->singleLineContext->pop(); |
| 47 | return $node->nextSibling; |
| 48 | } |
| 49 | |
| 50 | /** @inheritDoc */ |
| 51 | public function before( Element $node, Node $otherNode, SerializerState $state ): array { |
| 52 | if ( WTUtils::isNewElt( $node ) && DiffDOMUtils::previousNonSepSibling( $node ) && |
| 53 | !WTUtils::isAnnotationStartMarkerMeta( $otherNode ) |
| 54 | ) { |
| 55 | // Default to two preceding newlines for new content |
| 56 | return [ 'min' => 2, 'max' => 2 ]; |
| 57 | } elseif ( WTUtils::isNewElt( $otherNode ) |
| 58 | && DiffDOMUtils::previousNonSepSibling( $node ) === $otherNode |
| 59 | ) { |
| 60 | // T72791: The previous node was newly inserted, separate |
| 61 | // them for readability, except if it's an annotation tag |
| 62 | if ( WTUtils::isAnnotationStartMarkerMeta( $otherNode ) ) { |
| 63 | return [ 'min' => 1, 'max' => 2 ]; |
| 64 | } |
| 65 | return [ 'min' => 2, 'max' => 2 ]; |
| 66 | } else { |
| 67 | return [ 'min' => 1, 'max' => 2 ]; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | /** @inheritDoc */ |
| 72 | public function after( Element $node, Node $otherNode, SerializerState $state ): array { |
| 73 | return [ 'min' => 1, 'max' => 2 ]; |
| 74 | } |
| 75 | |
| 76 | } |