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| 1 | <?php |
| 2 | declare( strict_types = 1 ); |
| 3 | |
| 4 | namespace Wikimedia\Parsoid\Wt2Html\TT; |
| 5 | |
| 6 | use Wikimedia\Assert\Assert; |
| 7 | use Wikimedia\Parsoid\Tokens\EndTagTk; |
| 8 | use Wikimedia\Parsoid\Tokens\EOFTk; |
| 9 | use Wikimedia\Parsoid\Tokens\SelfclosingTagTk; |
| 10 | use Wikimedia\Parsoid\Tokens\TagTk; |
| 11 | use Wikimedia\Parsoid\Tokens\Token; |
| 12 | use Wikimedia\Parsoid\Utils\PipelineUtils; |
| 13 | use Wikimedia\Parsoid\Utils\TokenUtils; |
| 14 | use Wikimedia\Parsoid\Wt2Html\TokenTransformManager; |
| 15 | |
| 16 | class DOMFragmentBuilder extends TokenHandler { |
| 17 | /** |
| 18 | * @param TokenTransformManager $manager manager environment |
| 19 | * @param array $options options |
| 20 | */ |
| 21 | public function __construct( TokenTransformManager $manager, array $options ) { |
| 22 | parent::__construct( $manager, $options ); |
| 23 | } |
| 24 | |
| 25 | /** |
| 26 | * Can/should content represented in 'toks' be processed in its own DOM scope? |
| 27 | * 1. No reason to spin up a new pipeline for plain text |
| 28 | * 2. In some cases, if templates need not be nested entirely within the |
| 29 | * boundary of the token, we cannot process the contents in a new scope. |
| 30 | * @param array $toks |
| 31 | * @param Token $contextTok |
| 32 | * @return bool |
| 33 | */ |
| 34 | private function subpipelineUnnecessary( array $toks, Token $contextTok ): bool { |
| 35 | for ( $i = 0, $n = count( $toks ); $i < $n; $i++ ) { |
| 36 | $t = $toks[$i]; |
| 37 | |
| 38 | // For wikilinks and extlinks, templates should be properly nested |
| 39 | // in the content section. So, we can process them in sub-pipelines. |
| 40 | // But, for other context-toks, we back out. FIXME: Can be smarter and |
| 41 | // detect proper template nesting, but, that can be a later enhancement |
| 42 | // when dom-scope-tokens are used in other contexts. |
| 43 | if ( $contextTok && $contextTok->getName() !== 'wikilink' && |
| 44 | $contextTok->getName() !== 'extlink' && |
| 45 | $t instanceof SelfclosingTagTk && |
| 46 | $t->getName() === 'meta' && TokenUtils::hasTypeOf( $t, 'mw:Transclusion' ) |
| 47 | ) { |
| 48 | return true; |
| 49 | } elseif ( $t instanceof TagTk || $t instanceof EndTagTk || $t instanceof SelfclosingTagTk ) { |
| 50 | // Since we encountered a complex token, we'll process this |
| 51 | // in a subpipeline. |
| 52 | return false; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | // No complex tokens at all -- no need to spin up a new pipeline |
| 57 | return true; |
| 58 | } |
| 59 | |
| 60 | private function buildDOMFragment( Token $scopeToken ): TokenHandlerResult { |
| 61 | $contentKV = $scopeToken->getAttributeKV( 'content' ); |
| 62 | $content = $contentKV->v; |
| 63 | if ( is_string( $content ) || |
| 64 | $this->subpipelineUnnecessary( $content, $scopeToken->getAttributeV( 'contextTok' ) ) |
| 65 | ) { |
| 66 | // New pipeline not needed. Pass them through |
| 67 | return new TokenHandlerResult( is_string( $content ) ? [ $content ] : $content ); |
| 68 | } else { |
| 69 | // Source offsets of content |
| 70 | $srcOffsets = $contentKV->srcOffsets; |
| 71 | |
| 72 | // Without source offsets for the content, it isn't possible to |
| 73 | // compute DSR and template wrapping in content. So, users of |
| 74 | // mw:dom-fragment-token should always set offsets on content |
| 75 | // that comes from the top-level document. |
| 76 | Assert::invariant( |
| 77 | $this->options['inTemplate'] || (bool)$srcOffsets, |
| 78 | 'Processing top-level content without source offsets' |
| 79 | ); |
| 80 | |
| 81 | $pipelineOpts = [ |
| 82 | 'inlineContext' => $scopeToken->getAttributeV( 'inlineContext' ) === "1", |
| 83 | 'expandTemplates' => $this->options['expandTemplates'], |
| 84 | 'inTemplate' => $this->options['inTemplate'] |
| 85 | ]; |
| 86 | |
| 87 | // Append EOF |
| 88 | $content[] = new EOFTk(); |
| 89 | |
| 90 | // Process tokens |
| 91 | $domFragment = PipelineUtils::processContentInPipeline( |
| 92 | $this->env, |
| 93 | $this->manager->getFrame(), |
| 94 | // Append EOF |
| 95 | $content, |
| 96 | [ |
| 97 | 'pipelineType' => 'expanded-tokens-to-fragment', |
| 98 | 'pipelineOpts' => $pipelineOpts, |
| 99 | 'srcOffsets' => $srcOffsets->value, |
| 100 | 'sol' => true |
| 101 | ] |
| 102 | ); |
| 103 | |
| 104 | $toks = PipelineUtils::tunnelDOMThroughTokens( |
| 105 | $this->env, |
| 106 | $scopeToken, |
| 107 | $domFragment, |
| 108 | [ "pipelineOpts" => $pipelineOpts ] |
| 109 | ); |
| 110 | |
| 111 | return new TokenHandlerResult( $toks ); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * @inheritDoc |
| 117 | */ |
| 118 | public function onTag( Token $token ): ?TokenHandlerResult { |
| 119 | return $token->getName() === 'mw:dom-fragment-token' ? |
| 120 | $this->buildDOMFragment( $token ) : null; |
| 121 | } |
| 122 | } |