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| 1 | <?php |
| 2 | declare( strict_types = 1 ); |
| 3 | |
| 4 | namespace Wikimedia\Parsoid\Tokens; |
| 5 | |
| 6 | use stdClass; |
| 7 | use Wikimedia\Assert\Assert; |
| 8 | use Wikimedia\Parsoid\Core\DomSourceRange; |
| 9 | use Wikimedia\Parsoid\NodeData\DataParsoid; |
| 10 | use Wikimedia\Parsoid\Utils\PHPUtils; |
| 11 | use Wikimedia\Parsoid\Wt2Html\Frame; |
| 12 | |
| 13 | /** |
| 14 | * Catch-all class for all token types. |
| 15 | */ |
| 16 | abstract class Token implements \JsonSerializable { |
| 17 | /** @var DataParsoid|null */ |
| 18 | public $dataParsoid; |
| 19 | |
| 20 | /** @var KV[] */ |
| 21 | public $attribs; |
| 22 | |
| 23 | /** |
| 24 | * @inheritDoc |
| 25 | */ |
| 26 | #[\ReturnTypeWillChange] |
| 27 | abstract public function jsonSerialize(); |
| 28 | |
| 29 | /** |
| 30 | * Get a name for the token. |
| 31 | * Derived classes can override this. |
| 32 | * @return string |
| 33 | */ |
| 34 | public function getName(): string { |
| 35 | return $this->getType(); |
| 36 | } |
| 37 | |
| 38 | /** |
| 39 | * Returns a string key for this token |
| 40 | * @return string |
| 41 | */ |
| 42 | public function getType(): string { |
| 43 | $classParts = explode( '\\', get_class( $this ) ); |
| 44 | return end( $classParts ); |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Generic set attribute method. |
| 49 | * |
| 50 | * @param string $name |
| 51 | * Always a string when used this way. |
| 52 | * The more complex form (where the key is a non-string) are found when |
| 53 | * KV objects are constructed in the tokenizer. |
| 54 | * @param string|Token|array<Token|string> $value |
| 55 | * @param ?KVSourceRange $srcOffsets |
| 56 | */ |
| 57 | public function addAttribute( |
| 58 | string $name, $value, ?KVSourceRange $srcOffsets = null |
| 59 | ): void { |
| 60 | $this->attribs[] = new KV( $name, $value, $srcOffsets ); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Generic set attribute method with support for change detection. |
| 65 | * Set a value and preserve the original wikitext that produced it. |
| 66 | * |
| 67 | * @param string $name |
| 68 | * @param string|Token|Token[] $value |
| 69 | * @param mixed $origValue |
| 70 | */ |
| 71 | public function addNormalizedAttribute( string $name, $value, $origValue ): void { |
| 72 | $this->addAttribute( $name, $value ); |
| 73 | $this->setShadowInfo( $name, $value, $origValue ); |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Generic attribute accessor. |
| 78 | * |
| 79 | * @param string $name |
| 80 | * @return string|Token|Token[]|KV[]|null |
| 81 | */ |
| 82 | public function getAttributeV( string $name ) { |
| 83 | return KV::lookup( $this->attribs, $name ); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Generic attribute accessor. |
| 88 | * |
| 89 | * @param string $name |
| 90 | * @return KV|null |
| 91 | */ |
| 92 | public function getAttributeKV( string $name ) { |
| 93 | return KV::lookupKV( $this->attribs, $name ); |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Generic attribute accessor. |
| 98 | * |
| 99 | * @param string $name |
| 100 | * @return bool |
| 101 | */ |
| 102 | public function hasAttribute( string $name ): bool { |
| 103 | return $this->getAttributeKV( $name ) !== null; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Set an unshadowed attribute. |
| 108 | * |
| 109 | * @param string $name |
| 110 | * @param string|Token|Token[] $value |
| 111 | */ |
| 112 | public function setAttribute( string $name, $value ): void { |
| 113 | // First look for the attribute and change the last match if found. |
| 114 | for ( $i = count( $this->attribs ) - 1; $i >= 0; $i-- ) { |
| 115 | $kv = $this->attribs[$i]; |
| 116 | $k = $kv->k; |
| 117 | if ( is_string( $k ) && mb_strtolower( $k ) === $name ) { |
| 118 | $kv->v = $value; |
| 119 | $this->attribs[$i] = $kv; |
| 120 | return; |
| 121 | } |
| 122 | } |
| 123 | // Nothing found, just add the attribute |
| 124 | $this->addAttribute( $name, $value ); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Store the original value of an attribute in a token's dataParsoid. |
| 129 | * |
| 130 | * @param string $name |
| 131 | * @param mixed $value |
| 132 | * @param mixed $origValue |
| 133 | */ |
| 134 | public function setShadowInfo( string $name, $value, $origValue ): void { |
| 135 | // Don't shadow if value is the same or the orig is null |
| 136 | if ( $value !== $origValue && $origValue !== null ) { |
| 137 | $this->dataParsoid->a ??= []; |
| 138 | $this->dataParsoid->a[$name] = $value; |
| 139 | $this->dataParsoid->sa ??= []; |
| 140 | $this->dataParsoid->sa[$name] = $origValue; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Attribute info accessor for the wikitext serializer. Performs change |
| 146 | * detection and uses unnormalized attribute values if set. Expects the |
| 147 | * context to be set to a token. |
| 148 | * |
| 149 | * @param string $name |
| 150 | * @return array Information about the shadow info attached to this attribute: |
| 151 | * - value: (Token|Token[]|string) |
| 152 | * When modified is false and fromsrc is true, this is always a string. |
| 153 | * - modified: (bool) |
| 154 | * - fromsrc: (bool) |
| 155 | */ |
| 156 | public function getAttributeShadowInfo( string $name ): array { |
| 157 | $curVal = $this->getAttributeV( $name ); |
| 158 | |
| 159 | // Not the case, continue regular round-trip information. |
| 160 | if ( !property_exists( $this->dataParsoid, 'a' ) || |
| 161 | !array_key_exists( $name, $this->dataParsoid->a ) |
| 162 | ) { |
| 163 | return [ |
| 164 | "value" => $curVal, |
| 165 | // Mark as modified if a new element |
| 166 | "modified" => $this->dataParsoid->isModified(), |
| 167 | "fromsrc" => false |
| 168 | ]; |
| 169 | } elseif ( $this->dataParsoid->a[$name] !== $curVal ) { |
| 170 | return [ |
| 171 | "value" => $curVal, |
| 172 | "modified" => true, |
| 173 | "fromsrc" => false |
| 174 | ]; |
| 175 | } elseif ( !property_exists( $this->dataParsoid, 'sa' ) || |
| 176 | !array_key_exists( $name, $this->dataParsoid->sa ) |
| 177 | ) { |
| 178 | return [ |
| 179 | "value" => $curVal, |
| 180 | "modified" => false, |
| 181 | "fromsrc" => false |
| 182 | ]; |
| 183 | } else { |
| 184 | return [ |
| 185 | "value" => $this->dataParsoid->sa[$name], |
| 186 | "modified" => false, |
| 187 | "fromsrc" => true |
| 188 | ]; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Completely remove all attributes with this name. |
| 194 | * |
| 195 | * @param string $name |
| 196 | */ |
| 197 | public function removeAttribute( string $name ): void { |
| 198 | foreach ( $this->attribs as $i => $kv ) { |
| 199 | if ( mb_strtolower( $kv->k ) === $name ) { |
| 200 | unset( $this->attribs[$i] ); |
| 201 | } |
| 202 | } |
| 203 | $this->attribs = array_values( $this->attribs ); |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Add a space-separated property value. |
| 208 | * These are Parsoid-added attributes, not something present in source. |
| 209 | * So, only a regular ASCII space characters will be used here. |
| 210 | * |
| 211 | * @param string $name The attribute name |
| 212 | * @param string $value The value to add to the attribute |
| 213 | */ |
| 214 | public function addSpaceSeparatedAttribute( string $name, string $value ): void { |
| 215 | $curVal = $this->getAttributeKV( $name ); |
| 216 | if ( $curVal !== null ) { |
| 217 | if ( in_array( $value, explode( ' ', $curVal->v ), true ) ) { |
| 218 | // value is already included, nothing to do. |
| 219 | return; |
| 220 | } |
| 221 | |
| 222 | // Value was not yet included in the existing attribute, just add |
| 223 | // it separated with a space |
| 224 | $this->setAttribute( $curVal->k, $curVal->v . ' ' . $value ); |
| 225 | } else { |
| 226 | // the attribute did not exist at all, just add it |
| 227 | $this->addAttribute( $name, $value ); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Get the wikitext source of a token. |
| 233 | * |
| 234 | * @param Frame $frame |
| 235 | * @return string |
| 236 | */ |
| 237 | public function getWTSource( Frame $frame ): string { |
| 238 | $tsr = $this->dataParsoid->tsr ?? null; |
| 239 | if ( !( $tsr instanceof SourceRange ) ) { |
| 240 | throw new InvalidTokenException( 'Expected token to have tsr info.' ); |
| 241 | } |
| 242 | $srcText = $frame->getSrcText(); |
| 243 | Assert::invariant( $tsr->end >= $tsr->start, 'Bad TSR' ); |
| 244 | return $tsr->substr( $srcText ); |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Create key value set from an array |
| 249 | * |
| 250 | * @param array $a |
| 251 | * @return array |
| 252 | */ |
| 253 | private static function kvsFromArray( array $a ): array { |
| 254 | $kvs = []; |
| 255 | foreach ( $a as $e ) { |
| 256 | if ( is_array( $e["k"] ?? null ) ) { |
| 257 | self::rebuildNestedTokens( $e["k"] ); |
| 258 | } |
| 259 | $v = $e['v'] ?? null; |
| 260 | if ( is_array( $v ) ) { |
| 261 | // $v is either an array of Tokens or an array of KVs |
| 262 | if ( count( $v ) > 0 ) { |
| 263 | if ( is_array( $v[0] ) && array_key_exists( 'k', $v[0] ) ) { |
| 264 | $v = self::kvsFromArray( $v ); |
| 265 | } else { |
| 266 | self::rebuildNestedTokens( $v ); |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | $so = $e["srcOffsets"] ?? null; |
| 271 | if ( $so ) { |
| 272 | $so = KVSourceRange::fromArray( $so ); |
| 273 | } |
| 274 | $kvs[] = new KV( |
| 275 | $e["k"] ?? null, |
| 276 | $v, |
| 277 | $so, |
| 278 | $e["ksrc"] ?? null, |
| 279 | $e["vsrc"] ?? null |
| 280 | ); |
| 281 | } |
| 282 | return $kvs; |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * @param iterable|stdClass|DataParsoid &$a |
| 287 | */ |
| 288 | private static function rebuildNestedTokens( &$a ): void { |
| 289 | // objects do not count as iterables in PHP but can be iterated nevertheless |
| 290 | // @phan-suppress-next-line PhanTypeSuspiciousNonTraversableForeach |
| 291 | foreach ( $a as &$v ) { |
| 292 | $v = self::getToken( $v ); |
| 293 | } |
| 294 | unset( $v ); // Future-proof protection |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Get a token from some PHP structure. Used by the PHPUnit tests. |
| 299 | * |
| 300 | * @param KV|Token|array|string|int|float|bool|null $input |
| 301 | * @return Token|string|int|float|bool|null|array<Token|string|int|float|bool|null> |
| 302 | */ |
| 303 | public static function getToken( $input ) { |
| 304 | if ( !$input ) { |
| 305 | return $input; |
| 306 | } |
| 307 | |
| 308 | if ( is_array( $input ) && isset( $input['type'] ) ) { |
| 309 | if ( isset( $input['dataParsoid'] ) ) { |
| 310 | $da = new DataParsoid; |
| 311 | foreach ( $input['dataParsoid'] as $key => $value ) { |
| 312 | switch ( $key ) { |
| 313 | case 'tmp': |
| 314 | $tmp = $da->getTemp(); |
| 315 | foreach ( $value as $key2 => $value2 ) { |
| 316 | $tmp->$key2 = $value2; |
| 317 | } |
| 318 | break; |
| 319 | case 'dsr': |
| 320 | // dsr is generally for DOM trees, not Tokens. |
| 321 | $da->dsr = DomSourceRange::fromArray( $value ); |
| 322 | break; |
| 323 | case 'tsr': |
| 324 | $da->tsr = SourceRange::fromArray( $value ); |
| 325 | break; |
| 326 | case 'extTagOffsets': |
| 327 | $da->extTagOffsets = DomSourceRange::fromArray( $value ); |
| 328 | break; |
| 329 | case 'extLinkContentOffsets': |
| 330 | $da->extLinkContentOffsets = |
| 331 | SourceRange::fromArray( $value ); |
| 332 | break; |
| 333 | default: |
| 334 | $da->$key = $value; |
| 335 | } |
| 336 | } |
| 337 | } else { |
| 338 | $da = null; |
| 339 | } |
| 340 | switch ( $input['type'] ) { |
| 341 | case "SelfclosingTagTk": |
| 342 | $token = new SelfclosingTagTk( $input['name'], self::kvsFromArray( $input['attribs'] ), $da ); |
| 343 | break; |
| 344 | case "TagTk": |
| 345 | $token = new TagTk( $input['name'], self::kvsFromArray( $input['attribs'] ), $da ); |
| 346 | break; |
| 347 | case "EndTagTk": |
| 348 | $token = new EndTagTk( $input['name'], self::kvsFromArray( $input['attribs'] ), $da ); |
| 349 | break; |
| 350 | case "NlTk": |
| 351 | $token = new NlTk( $da->tsr ?? null, $da ); |
| 352 | break; |
| 353 | case "EOFTk": |
| 354 | $token = new EOFTk(); |
| 355 | break; |
| 356 | case "CommentTk": |
| 357 | $token = new CommentTk( $input["value"], $da ); |
| 358 | break; |
| 359 | default: |
| 360 | // Looks like data-parsoid can have a 'type' property in some cases |
| 361 | // We can change that usage and then throw an exception here |
| 362 | $token = &$input; |
| 363 | } |
| 364 | } elseif ( is_array( $input ) ) { |
| 365 | $token = &$input; |
| 366 | } else { |
| 367 | $token = $input; |
| 368 | } |
| 369 | |
| 370 | if ( is_array( $token ) ) { |
| 371 | self::rebuildNestedTokens( $token ); |
| 372 | } else { |
| 373 | if ( !empty( $token->attribs ) ) { |
| 374 | self::rebuildNestedTokens( $token->attribs ); |
| 375 | } |
| 376 | if ( !empty( $token->dataParsoid ) ) { |
| 377 | self::rebuildNestedTokens( $token->dataParsoid ); |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | return $token; |
| 382 | } |
| 383 | |
| 384 | public function fetchExpandedAttrValue( string $key ): ?string { |
| 385 | if ( preg_match( |
| 386 | '/mw:ExpandedAttrs/', $this->getAttributeV( 'typeof' ) ?? '' |
| 387 | ) ) { |
| 388 | $attribs = PHPUtils::jsonDecode( |
| 389 | $this->getAttributeV( 'data-mw' ), false |
| 390 | )->attribs; |
| 391 | foreach ( $attribs as $attr ) { |
| 392 | if ( $attr[0]->txt === $key ) { |
| 393 | return $attr[1]->html; |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | return null; |
| 398 | } |
| 399 | |
| 400 | } |