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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\Config\Env; |
| 8 | use Wikimedia\Parsoid\DOM\Element; |
| 9 | use Wikimedia\Parsoid\NodeData\DataParsoid; |
| 10 | use Wikimedia\Parsoid\NodeData\ParamInfo; |
| 11 | use Wikimedia\Parsoid\NodeData\TemplateInfo; |
| 12 | use Wikimedia\Parsoid\Tokens\CommentTk; |
| 13 | use Wikimedia\Parsoid\Tokens\KV; |
| 14 | use Wikimedia\Parsoid\Tokens\NlTk; |
| 15 | use Wikimedia\Parsoid\Tokens\SelfclosingTagTk; |
| 16 | use Wikimedia\Parsoid\Tokens\SourceRange; |
| 17 | use Wikimedia\Parsoid\Tokens\Token; |
| 18 | use Wikimedia\Parsoid\Utils\ContentUtils; |
| 19 | use Wikimedia\Parsoid\Utils\DOMDataUtils; |
| 20 | use Wikimedia\Parsoid\Utils\DOMUtils; |
| 21 | use Wikimedia\Parsoid\Utils\PipelineUtils; |
| 22 | use Wikimedia\Parsoid\Utils\TokenUtils; |
| 23 | use Wikimedia\Parsoid\Wt2Html\Frame; |
| 24 | |
| 25 | /** |
| 26 | * A helper class for TemplateHandler that encapsulates template-like syntax |
| 27 | * with the appropriate meta tags, adding argument info data. |
| 28 | */ |
| 29 | class TemplateEncapsulator { |
| 30 | private Env $env; |
| 31 | private Frame $frame; |
| 32 | private string $wrapperType; |
| 33 | private string $aboutId; |
| 34 | public Token $token; |
| 35 | public ?string $variableName = null; |
| 36 | public ?string $parserFunctionName = null; |
| 37 | public ?string $resolvedTemplateTarget = null; |
| 38 | |
| 39 | public function __construct( Env $env, Frame $frame, Token $token, string $wrapperType ) { |
| 40 | $this->env = $env; |
| 41 | $this->frame = $frame; |
| 42 | $this->token = $token; |
| 43 | $this->wrapperType = $wrapperType; |
| 44 | $this->aboutId = $env->newAboutId(); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Main entry point. |
| 49 | * Encapsulate the template element, including the arguments. |
| 50 | * |
| 51 | * @param array $tokens |
| 52 | * @return array |
| 53 | */ |
| 54 | public function encapTokens( array $tokens ): array { |
| 55 | $toks = $this->getEncapsulationInfo( $tokens ); |
| 56 | $toks[] = $this->getEncapsulationInfoEndTag(); |
| 57 | $tplInfo = $this->getTemplateInfo(); |
| 58 | |
| 59 | if ( $this->env->getSiteConfig()->addHTMLTemplateParameters() ) { |
| 60 | // Parse the parameters that need parsing |
| 61 | foreach ( $tplInfo->paramInfos as $paramInfo ) { |
| 62 | $paramTokens = null; |
| 63 | if ( $paramInfo->named ) { |
| 64 | $paramTokens = $this->token->getAttributeV( $paramInfo->k ); |
| 65 | } else { |
| 66 | $paramTokens = $this->token->attribs[$paramInfo->k]->v; |
| 67 | } |
| 68 | |
| 69 | // No need to pass through a whole sub-pipeline to get the |
| 70 | // html if the param is either a single string, or if it's |
| 71 | // just text, comments or newlines. |
| 72 | if ( $paramTokens && |
| 73 | ( is_string( $paramTokens ) || self::isSimpleParam( $paramTokens ) ) |
| 74 | ) { |
| 75 | $paramInfo->html = $paramInfo->valueWt; |
| 76 | } elseif ( |
| 77 | // FIXME: this should not have its own regex parsing separate from the PEG |
| 78 | preg_match( '#^https?://[^[\]{}\s]*$#D', $paramInfo->valueWt ) |
| 79 | ) { |
| 80 | // If the param is just a simple URL, we can process it to |
| 81 | // HTML directly without going through a sub-pipeline. |
| 82 | $paramInfo->html = "<a rel='mw:ExtLink' href='" . |
| 83 | str_replace( "'", ''', $paramInfo->valueWt ) . "'>" . |
| 84 | $paramInfo->valueWt . '</a>'; |
| 85 | } else { |
| 86 | $this->getParamHTML( $paramInfo ); |
| 87 | } |
| 88 | } |
| 89 | } else { |
| 90 | // Don't add the HTML template parameters, just use their wikitext |
| 91 | } |
| 92 | |
| 93 | $toks[0]->dataParsoid->getTemp()->tplarginfo = $tplInfo; |
| 94 | |
| 95 | $this->env->log( 'debug', 'TemplateEncapsulator.encapTokens', $toks ); |
| 96 | return $toks; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Get the public data-mw structure that exposes the template name and |
| 101 | * parameters. |
| 102 | * |
| 103 | * @return TemplateInfo |
| 104 | */ |
| 105 | private function getTemplateInfo(): TemplateInfo { |
| 106 | $ret = new TemplateInfo; |
| 107 | $src = $this->frame->getSrcText(); |
| 108 | $params = $this->token->attribs; |
| 109 | $paramInfos = []; |
| 110 | $argIndex = 1; |
| 111 | |
| 112 | // Use source offsets to extract arg-name and arg-value wikitext |
| 113 | // since the 'k' and 'v' values in params will be expanded tokens |
| 114 | // |
| 115 | // Ignore params[0] -- that is the template name |
| 116 | for ( $i = 1, $n = count( $params ); $i < $n; $i++ ) { |
| 117 | $param = $params[$i]; |
| 118 | $srcOffsets = $param->srcOffsets; |
| 119 | $kSrc = null; |
| 120 | $vSrc = null; |
| 121 | if ( $srcOffsets !== null ) { |
| 122 | $kSrc = $srcOffsets->key->substr( $src ); |
| 123 | $vSrc = $srcOffsets->value->substr( $src ); |
| 124 | } else { |
| 125 | $kSrc = $param->k; |
| 126 | $vSrc = $param->v; |
| 127 | } |
| 128 | |
| 129 | $kWt = trim( $kSrc ); |
| 130 | $k = TokenUtils::tokensToString( $param->k, true, [ 'stripEmptyLineMeta' => true ] ); |
| 131 | if ( is_array( $k ) ) { |
| 132 | // The PHP parser only removes comments and whitespace to construct |
| 133 | // the real parameter name, so if there were other tokens, use the |
| 134 | // original text |
| 135 | $k = $kWt; |
| 136 | } else { |
| 137 | $k = trim( $k ); |
| 138 | } |
| 139 | $v = $vSrc; |
| 140 | |
| 141 | // Even if k is empty, we need to check v immediately follows. If not, |
| 142 | // it's a blank parameter name (which is valid) and we shouldn't make it |
| 143 | // positional. |
| 144 | if ( $k === '' && |
| 145 | $srcOffsets && |
| 146 | $srcOffsets->key->end === $srcOffsets->value->start |
| 147 | ) { |
| 148 | $isPositional = true; |
| 149 | $k = (string)$argIndex; |
| 150 | $argIndex++; |
| 151 | } else { |
| 152 | $isPositional = false; |
| 153 | // strip ws from named parameter values |
| 154 | $v = trim( $v ); |
| 155 | } |
| 156 | |
| 157 | if ( !isset( $paramInfos[$k] ) ) { |
| 158 | $paramInfo = new ParamInfo( $k, $srcOffsets ); |
| 159 | |
| 160 | Assert::invariant( |
| 161 | preg_match( '/^(\s*)(?:.*\S)?(\s*)$/sD', $kSrc, $keySpaceMatch ), |
| 162 | 'Template argument whitespace match failed.' |
| 163 | ); |
| 164 | $valueSpaceMatch = null; |
| 165 | |
| 166 | if ( $isPositional ) { |
| 167 | // PHP parser does not strip whitespace around |
| 168 | // positional params and neither will we. |
| 169 | $valueSpaceMatch = [ null, '', '' ]; |
| 170 | } else { |
| 171 | $paramInfo->named = true; |
| 172 | if ( $v !== '' ) { |
| 173 | Assert::invariant( |
| 174 | preg_match( '/^(\s*)(?:.*\S)?(\s*)$/sD', $vSrc, $valueSpaceMatch ), |
| 175 | 'Template argument whitespace match failed.' |
| 176 | ); |
| 177 | } else { |
| 178 | $valueSpaceMatch = [ null, '', $vSrc ]; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | // Preserve key and value space prefix / postfix, if any. |
| 183 | // "=" is the default spacing used by the serializer, |
| 184 | if ( $keySpaceMatch[1] || $keySpaceMatch[2] || $valueSpaceMatch[1] || $valueSpaceMatch[2] ) { |
| 185 | // Remember non-standard spacing |
| 186 | $paramInfo->spc = [ |
| 187 | $keySpaceMatch[1], $keySpaceMatch[2], |
| 188 | $valueSpaceMatch[1], $valueSpaceMatch[2] |
| 189 | ]; |
| 190 | } |
| 191 | } else { |
| 192 | $paramInfo = $paramInfos[$k]; |
| 193 | } |
| 194 | |
| 195 | $paramInfo->valueWt = $v; |
| 196 | // Only add the original parameter wikitext if named and different from |
| 197 | // the actual parameter. |
| 198 | if ( !$isPositional && $kWt !== $k ) { |
| 199 | $paramInfo->keyWt = $kWt; |
| 200 | } |
| 201 | $paramInfos[$k] = $paramInfo; |
| 202 | } |
| 203 | |
| 204 | $ret->paramInfos = $paramInfos; |
| 205 | |
| 206 | $tgtSrcOffsets = $params[0]->srcOffsets; |
| 207 | if ( $tgtSrcOffsets ) { |
| 208 | $tplTgtWT = $tgtSrcOffsets->key->substr( $src ); |
| 209 | $ret->targetWt = $tplTgtWT; |
| 210 | } |
| 211 | |
| 212 | // Add in tpl-target/pf-name info |
| 213 | // Only one of these will be set. |
| 214 | if ( $this->variableName !== null ) { |
| 215 | $ret->func = $this->variableName; |
| 216 | } elseif ( $this->parserFunctionName !== null ) { |
| 217 | $ret->func = $this->parserFunctionName; |
| 218 | } elseif ( $this->resolvedTemplateTarget !== null ) { |
| 219 | $ret->href = $this->resolvedTemplateTarget; |
| 220 | } |
| 221 | |
| 222 | return $ret; |
| 223 | } |
| 224 | |
| 225 | private function getEncapsulationInfo( ?array $chunk = null ): array { |
| 226 | // TODO |
| 227 | // * only add this information for top-level includes, but track parameter |
| 228 | // expansion in lower-level templates |
| 229 | // * ref all tables to this (just add about) |
| 230 | // * ref end token to this, add property="mw:Transclusion/End" |
| 231 | |
| 232 | $attrs = [ |
| 233 | new KV( 'typeof', $this->wrapperType ), |
| 234 | new KV( 'about', $this->aboutId ) |
| 235 | ]; |
| 236 | $dp = new DataParsoid; |
| 237 | $dp->tsr = clone $this->token->dataParsoid->tsr; |
| 238 | $dp->src = $this->token->dataParsoid->src; |
| 239 | |
| 240 | $meta = [ new SelfclosingTagTk( 'meta', $attrs, $dp ) ]; |
| 241 | $chunk = $chunk ? array_merge( $meta, $chunk ) : $meta; |
| 242 | return $chunk; |
| 243 | } |
| 244 | |
| 245 | private function getEncapsulationInfoEndTag(): Token { |
| 246 | $tsr = $this->token->dataParsoid->tsr ?? null; |
| 247 | $dp = new DataParsoid; |
| 248 | $dp->tsr = new SourceRange( null, $tsr ? $tsr->end : null ); |
| 249 | return new SelfclosingTagTk( 'meta', |
| 250 | [ |
| 251 | new KV( 'typeof', $this->wrapperType . '/End' ), |
| 252 | new KV( 'about', $this->aboutId ) |
| 253 | ], |
| 254 | $dp |
| 255 | ); |
| 256 | } |
| 257 | |
| 258 | /** |
| 259 | * Parameter processing helpers. |
| 260 | * |
| 261 | * @param mixed $tokens |
| 262 | * @return bool |
| 263 | */ |
| 264 | private static function isSimpleParam( $tokens ): bool { |
| 265 | if ( !is_array( $tokens ) ) { |
| 266 | $tokens = [ $tokens ]; |
| 267 | } |
| 268 | foreach ( $tokens as $t ) { |
| 269 | if ( !is_string( $t ) && !( $t instanceof CommentTk ) && !( $t instanceof NlTk ) ) { |
| 270 | return false; |
| 271 | } |
| 272 | } |
| 273 | return true; |
| 274 | } |
| 275 | |
| 276 | /** |
| 277 | * Add its HTML conversion to a parameter |
| 278 | * |
| 279 | * @param ParamInfo $paramInfo |
| 280 | */ |
| 281 | private function getParamHTML( ParamInfo $paramInfo ): void { |
| 282 | $srcStart = $paramInfo->srcOffsets->value->start; |
| 283 | $srcEnd = $paramInfo->srcOffsets->value->end; |
| 284 | if ( !empty( $paramInfo->spc ) ) { |
| 285 | $srcStart += strlen( $paramInfo->spc[2] ); |
| 286 | $srcEnd -= strlen( $paramInfo->spc[3] ); |
| 287 | } |
| 288 | |
| 289 | $domFragment = PipelineUtils::processContentInPipeline( |
| 290 | $this->env, $this->frame, |
| 291 | $paramInfo->valueWt, |
| 292 | [ |
| 293 | 'pipelineType' => 'fullparse-wikitext-to-dom', |
| 294 | 'pipelineOpts' => [ |
| 295 | 'expandTemplates' => true, |
| 296 | // No need to do paragraph-wrapping here |
| 297 | 'inlineContext' => true |
| 298 | ], |
| 299 | 'srcOffsets' => new SourceRange( $srcStart, $srcEnd ), |
| 300 | 'sol' => true |
| 301 | ] |
| 302 | ); |
| 303 | // FIXME: We're better off setting a pipeline option above |
| 304 | // to skip dsr computation to begin with. Worth revisiting |
| 305 | // if / when `addHTMLTemplateParameters` is enabled. |
| 306 | // Remove DSR from children |
| 307 | DOMUtils::visitDOM( $domFragment, static function ( $node ) { |
| 308 | if ( !( $node instanceof Element ) ) { |
| 309 | return; |
| 310 | } |
| 311 | $dp = DOMDataUtils::getDataParsoid( $node ); |
| 312 | $dp->dsr = null; |
| 313 | } ); |
| 314 | $paramInfo->html = ContentUtils::ppToXML( |
| 315 | $domFragment, [ 'innerXML' => true ] |
| 316 | ); |
| 317 | } |
| 318 | |
| 319 | } |