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<?php declare( strict_types = 1 ); namespace Wikimedia\Parsoid\Wt2Html\TT; use Wikimedia\Assert\Assert; use Wikimedia\Parsoid\Config\Env; use Wikimedia\Parsoid\DOM\Element; use Wikimedia\Parsoid\NodeData\DataParsoid; use Wikimedia\Parsoid\NodeData\ParamInfo; use Wikimedia\Parsoid\NodeData\TemplateInfo; use Wikimedia\Parsoid\Tokens\CommentTk; use Wikimedia\Parsoid\Tokens\KV; use Wikimedia\Parsoid\Tokens\NlTk; use Wikimedia\Parsoid\Tokens\SelfclosingTagTk; use Wikimedia\Parsoid\Tokens\SourceRange; use Wikimedia\Parsoid\Tokens\Token; use Wikimedia\Parsoid\Utils\ContentUtils; use Wikimedia\Parsoid\Utils\DOMDataUtils; use Wikimedia\Parsoid\Utils\DOMUtils; use Wikimedia\Parsoid\Utils\PipelineUtils; use Wikimedia\Parsoid\Utils\TokenUtils; use Wikimedia\Parsoid\Wt2Html\Frame; /** * A helper class for TemplateHandler that encapsulates template-like syntax * with the appropriate meta tags, adding argument info data. / class TemplateEncapsulator { /* @var Env / private $env; /* @var Frame / private $frame; /* @var string / private $wrapperType; /* @var string / private $wrappedObjectId; /* @var Token / public $token; /* @var string\|null / public $variableName; /* @var string\|null / public $parserFunctionName; /* @var string\|null / public $resolvedTemplateTarget; /* * @param Env $env * @param Frame $frame * @param Token $token * @param string $wrapperType / public function __construct( Env $env, Frame $frame, Token $token, string $wrapperType ) { $this->env = $env; $this->frame = $frame; $this->token = $token; $this->wrapperType = $wrapperType; $this->wrappedObjectId = $env->newObjectId(); } /* * Main entry point. * Encapsulate the template element, including the arguments. * * @param array $tokens * @return array / public function encapTokens( array $tokens ): array { $toks = $this->getEncapsulationInfo( $tokens ); $toks[] = $this->getEncapsulationInfoEndTag(); $tplInfo = $this->getTemplateInfo(); if ( $this->env->getSiteConfig()->addHTMLTemplateParameters() ) { // Parse the parameters that need parsing foreach ( $tplInfo->paramInfos as $paramInfo ) { $paramTokens = null; if ( $paramInfo->named ) { $paramTokens = $this->token->getAttribute( $paramInfo->k ); } else { $paramTokens = $this->token->attribs[$paramInfo->k]->v; } // No need to pass through a whole sub-pipeline to get the // html if the param is either a single string, or if it's // just text, comments or newlines. if ( $paramTokens && ( is_string( $paramTokens ) \|\| self::isSimpleParam( $paramTokens ) ) ) { $paramInfo->html = $paramInfo->valueWt; } elseif ( // FIXME: this should not have its own regex parsing separate from the PEG preg_match( '#^https?://[^[\]{}\s]$#D', $paramInfo->valueWt ) ) { // If the param is just a simple URL, we can process it to // HTML directly without going through a sub-pipeline. $paramInfo->html = "<a rel='mw:ExtLink' href='" . str_replace( "'", ''', $paramInfo->valueWt ) . "'>" . $paramInfo->valueWt . '</a>'; } else { $this->getParamHTML( $paramInfo ); } } } else { // Don't add the HTML template parameters, just use their wikitext } $toks[0]->dataAttribs->getTemp()->tplarginfo = $tplInfo; $this->env->log( 'debug', 'TemplateEncapsulator.encapTokens', $toks ); return $toks; } /** * Get the public data-mw structure that exposes the template name and * parameters. * * @return TemplateInfo / private function getTemplateInfo(): TemplateInfo { $ret = new TemplateInfo; $src = $this->frame->getSrcText(); $params = $this->token->attribs; $paramInfos = []; $argIndex = 1; // Use source offsets to extract arg-name and arg-value wikitext // since the 'k' and 'v' values in params will be expanded tokens // // Ignore params[0] -- that is the template name for ( $i = 1, $n = count( $params ); $i < $n; $i++ ) { $param = $params[$i]; $srcOffsets = $param->srcOffsets; $kSrc = null; $vSrc = null; if ( $srcOffsets !== null ) { $kSrc = $srcOffsets->key->substr( $src ); $vSrc = $srcOffsets->value->substr( $src ); } else { $kSrc = $param->k; $vSrc = $param->v; } $kWt = trim( $kSrc ); $k = TokenUtils::tokensToString( $param->k, true, [ 'stripEmptyLineMeta' => true ] ); if ( is_array( $k ) ) { // The PHP parser only removes comments and whitespace to construct // the real parameter name, so if there were other tokens, use the // original text $k = $kWt; } else { $k = trim( $k ); } $v = $vSrc; // Even if k is empty, we need to check v immediately follows. If not, // it's a blank parameter name (which is valid) and we shouldn't make it // positional. if ( $k === '' && $srcOffsets && $srcOffsets->key->end === $srcOffsets->value->start ) { $isPositional = true; $k = (string)$argIndex; $argIndex++; } else { $isPositional = false; // strip ws from named parameter values $v = trim( $v ); } if ( !isset( $paramInfos[$k] ) ) { $paramInfo = new ParamInfo( $k, $srcOffsets ); Assert::invariant( preg_match( '/^(\s)(?:.\S)?(\s)$/sD', $kSrc, $keySpaceMatch ), 'Template argument whitespace match failed.' ); $valueSpaceMatch = null; if ( $isPositional ) { // PHP parser does not strip whitespace around // positional params and neither will we. $valueSpaceMatch = [ null, '', '' ]; } else { $paramInfo->named = true; if ( $v !== '' ) { Assert::invariant( preg_match( '/^(\s)(?:.\S)?(\s)$/sD', $vSrc, $valueSpaceMatch ), 'Template argument whitespace match failed.' ); } else { $valueSpaceMatch = [ null, '', $vSrc ]; } } // Preserve key and value space prefix / postfix, if any. // "=" is the default spacing used by the serializer, if ( $keySpaceMatch[1] \|\| $keySpaceMatch[2] \|\| $valueSpaceMatch[1] \|\| $valueSpaceMatch[2] ) { // Remember non-standard spacing $paramInfo->spc = [ $keySpaceMatch[1], $keySpaceMatch[2], $valueSpaceMatch[1], $valueSpaceMatch[2] ]; } } else { $paramInfo = $paramInfos[$k]; } $paramInfo->valueWt = $v; // Only add the original parameter wikitext if named and different from // the actual parameter. if ( !$isPositional && $kWt !== $k ) { $paramInfo->keyWt = $kWt; } $paramInfos[$k] = $paramInfo; } $ret->paramInfos = $paramInfos; $tgtSrcOffsets = $params[0]->srcOffsets; if ( $tgtSrcOffsets ) { $tplTgtWT = $tgtSrcOffsets->key->substr( $src ); $ret->targetWt = $tplTgtWT; } // Add in tpl-target/pf-name info // Only one of these will be set. if ( $this->variableName !== null ) { $ret->func = $this->variableName; } elseif ( $this->parserFunctionName !== null ) { $ret->func = $this->parserFunctionName; } elseif ( $this->resolvedTemplateTarget !== null ) { $ret->href = $this->resolvedTemplateTarget; } return $ret; } /* * @param ?array $chunk * @return array / private function getEncapsulationInfo( ?array $chunk = null ): array { // TODO // only add this information for top-level includes, but track parameter // expansion in lower-level templates // * ref all tables to this (just add about) // * ref end token to this, add property="mw:Transclusion/End" $attrs = [ new KV( 'typeof', $this->wrapperType ), new KV( 'about', '#' . $this->wrappedObjectId ) ]; $dp = new DataParsoid; $dp->tsr = clone $this->token->dataAttribs->tsr; $dp->src = $this->token->dataAttribs->src; $meta = [ new SelfclosingTagTk( 'meta', $attrs, $dp ) ]; $chunk = $chunk ? array_merge( $meta, $chunk ) : $meta; return $chunk; } /** * @return Token / private function getEncapsulationInfoEndTag(): Token { $tsr = $this->token->dataAttribs->tsr ?? null; $dp = new DataParsoid; $dp->tsr = new SourceRange( null, $tsr ? $tsr->end : null ); return new SelfclosingTagTk( 'meta', [ new KV( 'typeof', $this->wrapperType . '/End' ), new KV( 'about', '#' . $this->wrappedObjectId ) ], $dp ); } /* * Parameter processing helpers. * * @param mixed $tokens * @return bool / private static function isSimpleParam( $tokens ): bool { if ( !is_array( $tokens ) ) { $tokens = [ $tokens ]; } foreach ( $tokens as $t ) { if ( !is_string( $t ) && !( $t instanceof CommentTk ) && !( $t instanceof NlTk ) ) { return false; } } return true; } /* * Add its HTML conversion to a parameter * * @param ParamInfo $paramInfo */ private function getParamHTML( ParamInfo $paramInfo ): void { $srcStart = $paramInfo->srcOffsets->value->start; $srcEnd = $paramInfo->srcOffsets->value->end; if ( !empty( $paramInfo->spc ) ) { $srcStart += strlen( $paramInfo->spc[2] ); $srcEnd -= strlen( $paramInfo->spc[3] ); } $domFragment = PipelineUtils::processContentInPipeline( $this->env, $this->frame, $paramInfo->valueWt, [ 'pipelineType' => 'text/x-mediawiki/full', 'pipelineOpts' => [ 'isInclude' => false, 'expandTemplates' => true, // No need to do paragraph-wrapping here 'inlineContext' => true ], 'srcOffsets' => new SourceRange( $srcStart, $srcEnd ), 'sol' => true ] ); // FIXME: We're better off setting a pipeline option above // to skip dsr computation to begin with. Worth revisiting // if / when `addHTMLTemplateParameters` is enabled. // Remove DSR from children DOMUtils::visitDOM( $domFragment, static function ( $node ) { if ( !( $node instanceof Element ) ) { return; } $dp = DOMDataUtils::getDataParsoid( $node ); $dp->dsr = null; } ); $paramInfo->html = ContentUtils::ppToXML( $domFragment, [ 'innerXML' => true ] ); } }

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