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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Parse and compile Less files into CSS |
| 5 | */ |
| 6 | class Less_Parser { |
| 7 | |
| 8 | /** |
| 9 | * Default parser options |
| 10 | * @var array<string,mixed> |
| 11 | */ |
| 12 | public static $default_options = [ |
| 13 | 'compress' => false, // option - whether to compress |
| 14 | 'strictUnits' => false, // whether units need to evaluate correctly |
| 15 | /* How to process math |
| 16 | * always - eagerly try to solve all operations |
| 17 | * parens-division - require parens for division "/" |
| 18 | * parens | strict - require parens for all operations |
| 19 | */ |
| 20 | // NOTE: We use the default of Less.js 4.0 (parens-division) |
| 21 | // instead of Less.js 3.13 (always). |
| 22 | 'math' => 'parens-division', |
| 23 | 'relativeUrls' => true, // option - whether to adjust URL's to be relative |
| 24 | 'urlArgs' => '', // whether to add args into url tokens |
| 25 | 'numPrecision' => 8, |
| 26 | |
| 27 | 'import_dirs' => [], |
| 28 | |
| 29 | 'cache_dir' => null, |
| 30 | 'cache_method' => 'serialize', // false, 'serialize', 'callback'; |
| 31 | 'cache_callback_get' => null, |
| 32 | 'cache_callback_set' => null, |
| 33 | |
| 34 | 'sourceMap' => false, // whether to output a source map |
| 35 | 'sourceMapBasepath' => null, |
| 36 | 'sourceMapWriteTo' => null, |
| 37 | 'sourceMapURL' => null, |
| 38 | |
| 39 | 'indentation' => ' ', |
| 40 | |
| 41 | 'plugins' => [], |
| 42 | 'functions' => [], |
| 43 | |
| 44 | ]; |
| 45 | |
| 46 | /** @var array{compress:bool,strictUnits:bool,relativeUrls:bool,urlArgs:string,numPrecision:int,import_dirs:array,indentation:string} */ |
| 47 | public static $options = []; |
| 48 | |
| 49 | private $input; // Less input string |
| 50 | private $input_len; // input string length |
| 51 | private $pos; // current index in `input` |
| 52 | private $saveStack = []; // holds state for backtracking |
| 53 | private $furthest; |
| 54 | private $mb_internal_encoding = ''; // for remember exists value of mbstring.internal_encoding |
| 55 | |
| 56 | private $autoCommentAbsorb = true; |
| 57 | /** |
| 58 | * @var array<array{index:int,text:string,isLineComment:bool}> |
| 59 | */ |
| 60 | private $commentStore = []; |
| 61 | |
| 62 | /** |
| 63 | * @var Less_Environment |
| 64 | */ |
| 65 | private $env; |
| 66 | |
| 67 | protected $rules = []; |
| 68 | |
| 69 | /** |
| 70 | * Evaluated ruleset created by `getCss()`. Stored for potential use in `getVariables()` |
| 71 | * @var Less_Tree[]|null |
| 72 | */ |
| 73 | private $cachedEvaldRules; |
| 74 | |
| 75 | public static $has_extends = false; |
| 76 | |
| 77 | public static $next_id = 0; |
| 78 | |
| 79 | /** |
| 80 | * Filename to contents of all parsed the files |
| 81 | * |
| 82 | * @var array |
| 83 | */ |
| 84 | public static $contentsMap = []; |
| 85 | |
| 86 | /** |
| 87 | * @param Less_Environment|array|null $env |
| 88 | */ |
| 89 | public function __construct( $env = null ) { |
| 90 | // Top parser on an import tree must be sure there is one "env" |
| 91 | // which will then be passed around by reference. |
| 92 | if ( $env instanceof Less_Environment ) { |
| 93 | $this->env = $env; |
| 94 | } else { |
| 95 | $this->Reset( $env ); |
| 96 | } |
| 97 | |
| 98 | // mbstring.func_overload > 1 bugfix |
| 99 | // The encoding value must be set for each source file, |
| 100 | // therefore, to conserve resources and improve the speed of this design is taken here |
| 101 | if ( ini_get( 'mbstring.func_overload' ) ) { |
| 102 | $this->mb_internal_encoding = ini_get( 'mbstring.internal_encoding' ); |
| 103 | @ini_set( 'mbstring.internal_encoding', 'ascii' ); |
| 104 | } |
| 105 | Less_Tree::$parse = $this; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Reset the parser state completely |
| 110 | */ |
| 111 | public function Reset( $options = null ) { |
| 112 | $this->rules = []; |
| 113 | $this->cachedEvaldRules = null; |
| 114 | self::$has_extends = false; |
| 115 | self::$contentsMap = []; |
| 116 | |
| 117 | $this->env = new Less_Environment(); |
| 118 | |
| 119 | // set new options |
| 120 | $this->SetOptions( self::$default_options ); |
| 121 | if ( is_array( $options ) ) { |
| 122 | $this->SetOptions( $options ); |
| 123 | } |
| 124 | |
| 125 | $this->env->Init(); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Set one or more compiler options |
| 130 | * options: import_dirs, cache_dir, cache_method |
| 131 | */ |
| 132 | public function SetOptions( $options ) { |
| 133 | foreach ( $options as $option => $value ) { |
| 134 | $this->SetOption( $option, $value ); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Set one compiler option |
| 140 | */ |
| 141 | public function SetOption( $option, $value ) { |
| 142 | switch ( $option ) { |
| 143 | case 'strictMath': |
| 144 | if ( $value ) { |
| 145 | $this->env->math = Less_Environment::MATH_PARENS; |
| 146 | } else { |
| 147 | $this->env->math = Less_Environment::MATH_ALWAYS; |
| 148 | } |
| 149 | break; |
| 150 | |
| 151 | case 'math': |
| 152 | $value = strtolower( $value ); |
| 153 | if ( $value === 'always' ) { |
| 154 | $this->env->math = Less_Environment::MATH_ALWAYS; |
| 155 | } elseif ( $value === 'parens-division' ) { |
| 156 | $this->env->math = Less_Environment::MATH_PARENS_DIVISION; |
| 157 | } elseif ( $value === 'parens' || $value === 'strict' ) { |
| 158 | $this->env->math = Less_Environment::MATH_PARENS; |
| 159 | } |
| 160 | return; |
| 161 | |
| 162 | case 'import_dirs': |
| 163 | $this->SetImportDirs( $value ); |
| 164 | return; |
| 165 | |
| 166 | case 'cache_dir': |
| 167 | if ( is_string( $value ) ) { |
| 168 | Less_Cache::SetCacheDir( $value ); |
| 169 | Less_Cache::CheckCacheDir(); |
| 170 | } |
| 171 | return; |
| 172 | case 'functions': |
| 173 | foreach ( $value as $key => $function ) { |
| 174 | $this->registerFunction( $key, $function ); |
| 175 | } |
| 176 | return; |
| 177 | } |
| 178 | |
| 179 | self::$options[$option] = $value; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Registers a new custom function |
| 184 | * |
| 185 | * @param string $name function name |
| 186 | * @param callable $callback callback |
| 187 | */ |
| 188 | public function registerFunction( $name, $callback ) { |
| 189 | $this->env->functions[$name] = $callback; |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Removed an already registered function |
| 194 | * |
| 195 | * @param string $name function name |
| 196 | */ |
| 197 | public function unregisterFunction( $name ) { |
| 198 | if ( isset( $this->env->functions[$name] ) ) { |
| 199 | unset( $this->env->functions[$name] ); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Get the current css buffer |
| 205 | * |
| 206 | * @return string |
| 207 | */ |
| 208 | public function getCss() { |
| 209 | $precision = ini_get( 'precision' ); |
| 210 | @ini_set( 'precision', '16' ); |
| 211 | $locale = setlocale( LC_NUMERIC, 0 ); |
| 212 | setlocale( LC_NUMERIC, "C" ); |
| 213 | |
| 214 | try { |
| 215 | $root = new Less_Tree_Ruleset( null, $this->rules ); |
| 216 | $root->root = true; |
| 217 | $root->firstRoot = true; |
| 218 | |
| 219 | $importVisitor = new Less_ImportVisitor( $this->env ); |
| 220 | $importVisitor->run( $root ); |
| 221 | |
| 222 | $this->PreVisitors( $root ); |
| 223 | |
| 224 | self::$has_extends = false; |
| 225 | $evaldRoot = $root->compile( $this->env ); |
| 226 | |
| 227 | $this->cachedEvaldRules = $evaldRoot->rules; |
| 228 | |
| 229 | $this->PostVisitors( $evaldRoot ); |
| 230 | |
| 231 | if ( self::$options['sourceMap'] ) { |
| 232 | $generator = new Less_SourceMap_Generator( $evaldRoot, self::$contentsMap, self::$options ); |
| 233 | // will also save file |
| 234 | // FIXME: should happen somewhere else? |
| 235 | $css = $generator->generateCSS(); |
| 236 | } else { |
| 237 | $css = $evaldRoot->toCSS(); |
| 238 | } |
| 239 | |
| 240 | if ( self::$options['compress'] ) { |
| 241 | $css = preg_replace( '/(^(\s)+)|((\s)+$)/', '', $css ); |
| 242 | } |
| 243 | |
| 244 | } catch ( Exception $exc ) { |
| 245 | // Intentional fall-through so we can reset environment |
| 246 | } |
| 247 | |
| 248 | // reset php settings |
| 249 | @ini_set( 'precision', $precision ); |
| 250 | setlocale( LC_NUMERIC, $locale ); |
| 251 | |
| 252 | // If you previously defined $this->mb_internal_encoding |
| 253 | // is required to return the encoding as it was before |
| 254 | if ( $this->mb_internal_encoding != '' ) { |
| 255 | @ini_set( "mbstring.internal_encoding", $this->mb_internal_encoding ); |
| 256 | $this->mb_internal_encoding = ''; |
| 257 | } |
| 258 | |
| 259 | // Rethrow exception after we handled resetting the environment |
| 260 | if ( !empty( $exc ) ) { |
| 261 | throw $exc; |
| 262 | } |
| 263 | |
| 264 | return $css; |
| 265 | } |
| 266 | |
| 267 | public function findValueOf( $varName ) { |
| 268 | $rules = $this->cachedEvaldRules ?? $this->rules; |
| 269 | |
| 270 | foreach ( $rules as $rule ) { |
| 271 | if ( isset( $rule->variable ) && ( $rule->variable == true ) && ( str_replace( "@", "", $rule->name ) == $varName ) ) { |
| 272 | return $this->getVariableValue( $rule ); |
| 273 | } |
| 274 | } |
| 275 | return null; |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Get an array of the found variables in the parsed input. |
| 280 | * |
| 281 | * @return array |
| 282 | * @phan-return array<string,string|float|array> |
| 283 | */ |
| 284 | public function getVariables() { |
| 285 | $variables = []; |
| 286 | |
| 287 | $rules = $this->cachedEvaldRules ?? $this->rules; |
| 288 | foreach ( $rules as $key => $rule ) { |
| 289 | if ( $rule instanceof Less_Tree_Declaration && $rule->variable ) { |
| 290 | $variables[$rule->name] = $this->getVariableValue( $rule ); |
| 291 | } |
| 292 | } |
| 293 | return $variables; |
| 294 | } |
| 295 | |
| 296 | public function findVarByName( $var_name ) { |
| 297 | $rules = $this->cachedEvaldRules ?? $this->rules; |
| 298 | |
| 299 | foreach ( $rules as $rule ) { |
| 300 | if ( isset( $rule->variable ) && ( $rule->variable == true ) ) { |
| 301 | if ( $rule->name == $var_name ) { |
| 302 | return $this->getVariableValue( $rule ); |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | return null; |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * This method gets the value of the less variable from the rules object. |
| 311 | * Since the objects vary here we add the logic for extracting the css/less value. |
| 312 | * |
| 313 | * @param Less_Tree $var |
| 314 | * @return mixed |
| 315 | * @phan-return string|float|array<string|float> |
| 316 | */ |
| 317 | private function getVariableValue( Less_Tree $var ) { |
| 318 | switch ( get_class( $var ) ) { |
| 319 | case Less_Tree_Color::class: |
| 320 | return $this->rgb2html( $var->rgb ); |
| 321 | case Less_Tree_Variable::class: |
| 322 | return $this->findVarByName( $var->name ); |
| 323 | case Less_Tree_Keyword::class: |
| 324 | return $var->value; |
| 325 | case Less_Tree_Anonymous::class: |
| 326 | $return = []; |
| 327 | if ( is_array( $var->value ) ) { |
| 328 | foreach ( $var->value as $value ) { |
| 329 | /** @var Less_Tree $value */ |
| 330 | // in compilation phase, Less_Tree_Anonymous::$val can be a Less_Tree[] |
| 331 | // @phan-suppress-next-line PhanTypeExpectedObjectPropAccess,PhanTypeMismatchArgument |
| 332 | $return[ $value->name ] = $this->getVariableValue( $value ); |
| 333 | } |
| 334 | } |
| 335 | return count( $return ) === 1 ? $return[0] : $return; |
| 336 | case Less_Tree_Url::class: |
| 337 | // Based on Less_Tree_Url::genCSS() |
| 338 | // Recurse to serialize the Less_Tree_Quoted value |
| 339 | return 'url(' . $this->getVariableValue( $var->value ) . ')'; |
| 340 | case Less_Tree_Declaration::class: |
| 341 | if ( $var->value instanceof Less_Tree_Anonymous ) { |
| 342 | $nodes = $this->parseNode( $var->value->value, [ 'value', 'important' ], 0, [] ); |
| 343 | return $this->getVariableValue( $nodes[1][0] ); |
| 344 | } |
| 345 | return $this->getVariableValue( $var->value ); |
| 346 | case Less_Tree_Value::class: |
| 347 | $values = []; |
| 348 | foreach ( $var->value as $sub_value ) { |
| 349 | $values[] = $this->getVariableValue( $sub_value ); |
| 350 | } |
| 351 | return count( $values ) === 1 ? $values[0] : $values; |
| 352 | case Less_Tree_Quoted::class: |
| 353 | return $var->quote . $var->value . $var->quote; |
| 354 | case Less_Tree_Dimension::class: |
| 355 | $value = $var->value; |
| 356 | if ( $var->unit && $var->unit->numerator ) { |
| 357 | $value .= $var->unit->numerator[0]; |
| 358 | } |
| 359 | return $value; |
| 360 | case Less_Tree_Expression::class: |
| 361 | $values = []; |
| 362 | foreach ( $var->value as $item ) { |
| 363 | $values[] = $this->getVariableValue( $item ); |
| 364 | } |
| 365 | return implode( ' ', $values ); |
| 366 | case Less_Tree_Operation::class: |
| 367 | throw new Exception( 'getVariables() require Less to be compiled. please use $parser->getCss() before calling getVariables()' ); |
| 368 | case Less_Tree_Unit::class: |
| 369 | case Less_Tree_Comment::class: |
| 370 | case Less_Tree_Import::class: |
| 371 | case Less_Tree_Ruleset::class: |
| 372 | default: |
| 373 | throw new Exception( "type missing in switch/case getVariableValue for " . get_class( $var ) ); |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | private function rgb2html( $r, $g = -1, $b = -1 ) { |
| 378 | if ( is_array( $r ) && count( $r ) == 3 ) { |
| 379 | [ $r, $g, $b ] = $r; |
| 380 | } |
| 381 | |
| 382 | return sprintf( '#%02x%02x%02x', $r, $g, $b ); |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * Run pre-compile visitors |
| 387 | */ |
| 388 | private function PreVisitors( $root ) { |
| 389 | if ( self::$options['plugins'] ) { |
| 390 | foreach ( self::$options['plugins'] as $plugin ) { |
| 391 | if ( !empty( $plugin->isPreEvalVisitor ) ) { |
| 392 | $plugin->run( $root ); |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * Run post-compile visitors |
| 400 | */ |
| 401 | private function PostVisitors( $evaldRoot ) { |
| 402 | $visitors = []; |
| 403 | $visitors[] = new Less_Visitor_joinSelector(); |
| 404 | if ( self::$has_extends ) { |
| 405 | $visitors[] = new Less_Visitor_processExtends(); |
| 406 | } |
| 407 | $visitors[] = new Less_Visitor_toCSS(); |
| 408 | |
| 409 | if ( self::$options['plugins'] ) { |
| 410 | foreach ( self::$options['plugins'] as $plugin ) { |
| 411 | if ( property_exists( $plugin, 'isPreEvalVisitor' ) && $plugin->isPreEvalVisitor ) { |
| 412 | continue; |
| 413 | } |
| 414 | |
| 415 | if ( property_exists( $plugin, 'isPreVisitor' ) && $plugin->isPreVisitor ) { |
| 416 | array_unshift( $visitors, $plugin ); |
| 417 | } else { |
| 418 | $visitors[] = $plugin; |
| 419 | } |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | for ( $i = 0; $i < count( $visitors ); $i++ ) { |
| 424 | $visitors[$i]->run( $evaldRoot ); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * Parse a Less string |
| 430 | * |
| 431 | * @throws Less_Exception_Parser If the compiler encounters invalid syntax |
| 432 | * @param string $str The string to convert |
| 433 | * @param string|null $file_uri The url of the file |
| 434 | * @return $this |
| 435 | */ |
| 436 | public function parse( $str, $file_uri = null ) { |
| 437 | if ( !$file_uri ) { |
| 438 | $uri_root = ''; |
| 439 | $filename = 'anonymous-file-' . self::$next_id++ . '.less'; |
| 440 | } else { |
| 441 | $file_uri = self::WinPath( $file_uri ); |
| 442 | $filename = $file_uri; |
| 443 | $uri_root = dirname( $file_uri ); |
| 444 | } |
| 445 | |
| 446 | $previousFileInfo = $this->env->currentFileInfo; |
| 447 | $uri_root = self::WinPath( $uri_root ); |
| 448 | $this->SetFileInfo( $filename, $uri_root ); |
| 449 | |
| 450 | $this->input = $str; |
| 451 | $this->_parse(); |
| 452 | |
| 453 | if ( $previousFileInfo ) { |
| 454 | $this->env->currentFileInfo = $previousFileInfo; |
| 455 | } |
| 456 | |
| 457 | return $this; |
| 458 | } |
| 459 | |
| 460 | /** |
| 461 | * Parse a Less string from a given file |
| 462 | * |
| 463 | * @throws Less_Exception_Parser If the compiler encounters invalid syntax |
| 464 | * @param string $filename The file to parse |
| 465 | * @param string $uri_root The url of the file |
| 466 | * @param bool $returnRoot Indicates whether the return value should be a css string a root node |
| 467 | * @return Less_Tree_Ruleset|$this |
| 468 | */ |
| 469 | public function parseFile( $filename, $uri_root = '', $returnRoot = false ) { |
| 470 | if ( !file_exists( $filename ) ) { |
| 471 | $this->Error( sprintf( 'File `%s` not found.', $filename ) ); |
| 472 | } |
| 473 | |
| 474 | // fix uri_root? |
| 475 | // Instead of The mixture of file path for the first argument and directory path for the second argument has bee |
| 476 | if ( !$returnRoot && !empty( $uri_root ) && basename( $uri_root ) == basename( $filename ) ) { |
| 477 | $uri_root = dirname( $uri_root ); |
| 478 | } |
| 479 | |
| 480 | $previousFileInfo = $this->env->currentFileInfo; |
| 481 | |
| 482 | if ( $filename ) { |
| 483 | $filename = self::AbsPath( $filename, true ); |
| 484 | } |
| 485 | $uri_root = self::WinPath( $uri_root ); |
| 486 | |
| 487 | $this->SetFileInfo( $filename, $uri_root ); |
| 488 | |
| 489 | $this->env->addParsedFile( $filename ); |
| 490 | |
| 491 | if ( $returnRoot ) { |
| 492 | $rules = $this->GetRules( $filename ); |
| 493 | $return = new Less_Tree_Ruleset( null, $rules ); |
| 494 | } else { |
| 495 | $this->_parse( $filename ); |
| 496 | $return = $this; |
| 497 | } |
| 498 | |
| 499 | if ( $previousFileInfo ) { |
| 500 | $this->env->currentFileInfo = $previousFileInfo; |
| 501 | } |
| 502 | |
| 503 | return $return; |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * Allows a user to set variables values |
| 508 | * @param array $vars |
| 509 | * @return $this |
| 510 | */ |
| 511 | public function ModifyVars( $vars ) { |
| 512 | $this->input = self::serializeVars( $vars ); |
| 513 | $this->_parse(); |
| 514 | |
| 515 | return $this; |
| 516 | } |
| 517 | |
| 518 | /** |
| 519 | * @param string $filename |
| 520 | * @param string $uri_root |
| 521 | */ |
| 522 | public function SetFileInfo( $filename, $uri_root = '' ) { |
| 523 | $filename = Less_Environment::normalizePath( $filename ); |
| 524 | $dirname = preg_replace( '/[^\/\\\\]*$/', '', $filename ); |
| 525 | |
| 526 | if ( !empty( $uri_root ) ) { |
| 527 | $uri_root = rtrim( $uri_root, '/' ) . '/'; |
| 528 | } |
| 529 | |
| 530 | $currentFileInfo = []; |
| 531 | |
| 532 | // entry info |
| 533 | if ( isset( $this->env->currentFileInfo ) ) { |
| 534 | $currentFileInfo['entryPath'] = $this->env->currentFileInfo['entryPath']; |
| 535 | $currentFileInfo['entryUri'] = $this->env->currentFileInfo['entryUri']; |
| 536 | $currentFileInfo['rootpath'] = $this->env->currentFileInfo['rootpath']; |
| 537 | |
| 538 | } else { |
| 539 | $currentFileInfo['entryPath'] = $dirname; |
| 540 | $currentFileInfo['entryUri'] = $uri_root; |
| 541 | $currentFileInfo['rootpath'] = $dirname; |
| 542 | } |
| 543 | |
| 544 | $currentFileInfo['currentDirectory'] = $dirname; |
| 545 | $currentFileInfo['currentUri'] = $uri_root . basename( $filename ); |
| 546 | $currentFileInfo['filename'] = $filename; |
| 547 | $currentFileInfo['uri_root'] = $uri_root; |
| 548 | |
| 549 | // inherit reference |
| 550 | if ( isset( $this->env->currentFileInfo['reference'] ) && $this->env->currentFileInfo['reference'] ) { |
| 551 | $currentFileInfo['reference'] = true; |
| 552 | } |
| 553 | |
| 554 | $this->env->currentFileInfo = $currentFileInfo; |
| 555 | } |
| 556 | |
| 557 | /** |
| 558 | * @deprecated 1.5.1.2 |
| 559 | */ |
| 560 | public function SetCacheDir( $dir ) { |
| 561 | if ( !file_exists( $dir ) ) { |
| 562 | if ( mkdir( $dir ) ) { |
| 563 | return true; |
| 564 | } |
| 565 | throw new Less_Exception_Parser( 'Less.php cache directory couldn\'t be created: ' . $dir ); |
| 566 | |
| 567 | } elseif ( !is_dir( $dir ) ) { |
| 568 | throw new Less_Exception_Parser( 'Less.php cache directory doesn\'t exist: ' . $dir ); |
| 569 | |
| 570 | } elseif ( !is_writable( $dir ) ) { |
| 571 | throw new Less_Exception_Parser( 'Less.php cache directory isn\'t writable: ' . $dir ); |
| 572 | |
| 573 | } else { |
| 574 | $dir = self::WinPath( $dir ); |
| 575 | Less_Cache::$cache_dir = rtrim( $dir, '/' ) . '/'; |
| 576 | return true; |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | /** |
| 581 | * Set a list of directories or callbacks the parser should use for determining import paths |
| 582 | * |
| 583 | * Import closures are called with a single `$path` argument containing the unquoted `@import` |
| 584 | * string an input LESS file. The string is unchanged, except for a statically appended ".less" |
| 585 | * suffix if the basename does not yet contain a dot. If a dot is present in the filename, you |
| 586 | * are responsible for choosing whether to expand "foo.bar" to "foo.bar.less". If your callback |
| 587 | * can handle this import statement, return an array with an absolute file path and an optional |
| 588 | * URI path, or return void/null to indicate that your callback does not handle this import |
| 589 | * statement. |
| 590 | * |
| 591 | * Example: |
| 592 | * |
| 593 | * function ( $path ) { |
| 594 | * if ( $path === 'virtual/something.less' ) { |
| 595 | * return [ '/srv/elsewhere/thing.less', null ]; |
| 596 | * } |
| 597 | * } |
| 598 | * |
| 599 | * @param array $dirs The key should be a server directory from which LESS |
| 600 | * files may be imported. The value is an optional public URL or URL base path that corresponds to |
| 601 | * the same directory (use empty string otherwise). The value may also be a closure, in |
| 602 | * which case the key is ignored. |
| 603 | * @phan-param array<string,string|callable> $dirs |
| 604 | */ |
| 605 | public function SetImportDirs( $dirs ) { |
| 606 | self::$options['import_dirs'] = []; |
| 607 | |
| 608 | foreach ( $dirs as $path => $uri_root ) { |
| 609 | |
| 610 | $path = self::WinPath( $path ); |
| 611 | if ( !empty( $path ) ) { |
| 612 | $path = rtrim( $path, '/' ) . '/'; |
| 613 | } |
| 614 | |
| 615 | if ( !is_callable( $uri_root ) ) { |
| 616 | $uri_root = self::WinPath( $uri_root ); |
| 617 | if ( !empty( $uri_root ) ) { |
| 618 | $uri_root = rtrim( $uri_root, '/' ) . '/'; |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | self::$options['import_dirs'][$path] = $uri_root; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | /** |
| 627 | * @param string|null $file_path |
| 628 | */ |
| 629 | private function _parse( $file_path = null ) { |
| 630 | $this->rules = array_merge( $this->rules, $this->GetRules( $file_path ) ); |
| 631 | } |
| 632 | |
| 633 | /** |
| 634 | * Return the results of parsePrimary for $file_path |
| 635 | * Use cache and save cached results if possible |
| 636 | * |
| 637 | * @param string|null $file_path |
| 638 | */ |
| 639 | private function GetRules( $file_path ) { |
| 640 | $this->setInput( $file_path ); |
| 641 | |
| 642 | $cache_file = $this->cacheFile( $file_path ); |
| 643 | if ( $cache_file ) { |
| 644 | if ( self::$options['cache_method'] == 'callback' ) { |
| 645 | $callback = self::$options['cache_callback_get']; |
| 646 | if ( is_callable( $callback ) ) { |
| 647 | $cache = $callback( $this, $file_path, $cache_file ); |
| 648 | |
| 649 | if ( $cache ) { |
| 650 | $this->unsetInput(); |
| 651 | return $cache; |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | } elseif ( file_exists( $cache_file ) ) { |
| 656 | switch ( self::$options['cache_method'] ) { |
| 657 | |
| 658 | // Using serialize |
| 659 | case 'serialize': |
| 660 | $cache = unserialize( file_get_contents( $cache_file ) ); |
| 661 | if ( $cache ) { |
| 662 | touch( $cache_file ); |
| 663 | $this->unsetInput(); |
| 664 | return $cache; |
| 665 | } |
| 666 | break; |
| 667 | } |
| 668 | } |
| 669 | } |
| 670 | $this->skipWhitespace( 0 ); |
| 671 | $rules = $this->parsePrimary(); |
| 672 | |
| 673 | if ( $this->pos < $this->input_len ) { |
| 674 | throw new Less_Exception_Chunk( $this->input, null, $this->furthest, $this->env->currentFileInfo ); |
| 675 | } |
| 676 | |
| 677 | $this->unsetInput(); |
| 678 | |
| 679 | // save the cache |
| 680 | if ( $cache_file ) { |
| 681 | if ( self::$options['cache_method'] == 'callback' ) { |
| 682 | $callback = self::$options['cache_callback_set']; |
| 683 | if ( is_callable( $callback ) ) { |
| 684 | $callback( $this, $file_path, $cache_file, $rules ); |
| 685 | } |
| 686 | } else { |
| 687 | switch ( self::$options['cache_method'] ) { |
| 688 | case 'serialize': |
| 689 | file_put_contents( $cache_file, serialize( $rules ) ); |
| 690 | break; |
| 691 | } |
| 692 | |
| 693 | Less_Cache::CleanCache(); |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | return $rules; |
| 698 | } |
| 699 | |
| 700 | /** |
| 701 | * @internal since 4.3.0 No longer a public API. |
| 702 | */ |
| 703 | private function setInput( $file_path ) { |
| 704 | // Set up the input buffer |
| 705 | if ( $file_path ) { |
| 706 | $this->input = file_get_contents( $file_path ); |
| 707 | } |
| 708 | |
| 709 | $this->pos = $this->furthest = 0; |
| 710 | |
| 711 | // Remove potential UTF Byte Order Mark |
| 712 | $this->input = preg_replace( '/\\G\xEF\xBB\xBF/', '', $this->input ); |
| 713 | $this->input_len = strlen( $this->input ); |
| 714 | |
| 715 | if ( self::$options['sourceMap'] && $this->env->currentFileInfo ) { |
| 716 | $uri = $this->env->currentFileInfo['currentUri']; |
| 717 | self::$contentsMap[$uri] = $this->input; |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | /** |
| 722 | * @internal since 4.3.0 No longer a public API. |
| 723 | */ |
| 724 | private function unsetInput() { |
| 725 | // Free up some memory |
| 726 | $this->input = $this->pos = $this->input_len = $this->furthest = null; |
| 727 | $this->saveStack = []; |
| 728 | } |
| 729 | |
| 730 | /** |
| 731 | * @internal since 4.3.0 Use Less_Cache instead. |
| 732 | */ |
| 733 | private function cacheFile( $file_path ) { |
| 734 | if ( $file_path && $this->CacheEnabled() ) { |
| 735 | |
| 736 | $env = get_object_vars( $this->env ); |
| 737 | unset( $env['frames'] ); |
| 738 | |
| 739 | $parts = []; |
| 740 | $parts[] = $file_path; |
| 741 | $parts[] = filesize( $file_path ); |
| 742 | $parts[] = filemtime( $file_path ); |
| 743 | $parts[] = $env; |
| 744 | $parts[] = Less_Version::cache_version; |
| 745 | $parts[] = self::$options['cache_method']; |
| 746 | return Less_Cache::$cache_dir . Less_Cache::$prefix . base_convert( sha1( json_encode( $parts ) ), 16, 36 ) . '.lesscache'; |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | /** |
| 751 | * @since 4.3.0 |
| 752 | * @return string[] |
| 753 | */ |
| 754 | public function getParsedFiles() { |
| 755 | return $this->env->imports; |
| 756 | } |
| 757 | |
| 758 | /** |
| 759 | * @internal since 4.3.0 No longer a public API. |
| 760 | */ |
| 761 | private function save() { |
| 762 | $this->saveStack[] = $this->pos; |
| 763 | } |
| 764 | |
| 765 | private function restore() { |
| 766 | if ( $this->pos > $this->furthest ) { |
| 767 | $this->furthest = $this->pos; |
| 768 | } |
| 769 | $this->pos = array_pop( $this->saveStack ); |
| 770 | } |
| 771 | |
| 772 | private function forget() { |
| 773 | array_pop( $this->saveStack ); |
| 774 | } |
| 775 | |
| 776 | /** |
| 777 | * Determine if the character at the specified offset from the current position is a white space. |
| 778 | * |
| 779 | * @param int $offset |
| 780 | * @return bool |
| 781 | */ |
| 782 | private function isWhitespace( $offset = 0 ) { |
| 783 | // @phan-suppress-next-line PhanParamSuspiciousOrder False positive |
| 784 | return strpos( " \t\n\r\v\f", $this->input[$this->pos + $offset] ) !== false; |
| 785 | } |
| 786 | |
| 787 | /** |
| 788 | * Match a single character in the input. |
| 789 | * |
| 790 | * @param string $tok |
| 791 | * @return string|null |
| 792 | * @see less-2.5.3.js#parserInput.$char |
| 793 | */ |
| 794 | private function matchChar( $tok ) { |
| 795 | if ( ( $this->pos < $this->input_len ) && ( $this->input[$this->pos] === $tok ) ) { |
| 796 | $this->skipWhitespace( 1 ); |
| 797 | return $tok; |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | /** |
| 802 | * Match a regexp from the current start point |
| 803 | * |
| 804 | * @return string|array|null |
| 805 | * @see less-2.5.3.js#parserInput.$re |
| 806 | */ |
| 807 | private function matchReg( $tok ) { |
| 808 | if ( preg_match( $tok, $this->input, $match, 0, $this->pos ) ) { |
| 809 | $this->skipWhitespace( strlen( $match[0] ) ); |
| 810 | return count( $match ) === 1 ? $match[0] : $match; |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | /** |
| 815 | * Match an exact string of characters. |
| 816 | * |
| 817 | * @param string $tok |
| 818 | * @return string|null |
| 819 | * @see less-2.5.3.js#parserInput.$str |
| 820 | */ |
| 821 | private function matchStr( $tok ) { |
| 822 | $tokLength = strlen( $tok ); |
| 823 | if ( |
| 824 | ( $this->pos < $this->input_len ) && |
| 825 | substr( $this->input, $this->pos, $tokLength ) === $tok |
| 826 | ) { |
| 827 | $this->skipWhitespace( $tokLength ); |
| 828 | return $tok; |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | /** |
| 833 | * @param int|null $loc |
| 834 | * @return array|string|void|null |
| 835 | * @see less-3.13.1.js#parserInput.$quoted |
| 836 | */ |
| 837 | private function parseQuoted( $loc = null ) { |
| 838 | $pos = $loc ?? $this->pos; |
| 839 | $startChar = $this->input[ $pos ] ?? ''; |
| 840 | if ( $startChar !== '\'' && $startChar !== '"' ) { |
| 841 | return; |
| 842 | } |
| 843 | $currentPos = $pos; |
| 844 | $i = 1; |
| 845 | while ( $currentPos + $i < $this->input_len ) { |
| 846 | // Optimization: Skip over irrelevant chars without slow loop |
| 847 | $i += strcspn( $this->input, "\n\r$startChar\\", $currentPos + $i ); |
| 848 | switch ( $this->input[$currentPos + $i++] ) { |
| 849 | case "\\": |
| 850 | $i++; |
| 851 | break; |
| 852 | case "\r": |
| 853 | case "\n": |
| 854 | break; |
| 855 | case $startChar: |
| 856 | // NOTE: Our optimization means we look ahead instead of behind, |
| 857 | // so no +1s here. |
| 858 | $str = substr( $this->input, $currentPos, $i ); |
| 859 | if ( !$loc && $loc !== 0 ) { |
| 860 | $this->skipWhitespace( $i ); |
| 861 | return $str; |
| 862 | } |
| 863 | return [ $startChar, $str ]; |
| 864 | } |
| 865 | } |
| 866 | return null; |
| 867 | } |
| 868 | |
| 869 | /** |
| 870 | * Permissive parsing. Ignores everything except matching {} [] () and quotes |
| 871 | * until matching token (outside of blocks) |
| 872 | * @see less-3.13.1.js#parserInput.$parseUntil |
| 873 | */ |
| 874 | private function parseUntil( $tok ) { |
| 875 | $quote = ''; |
| 876 | $returnVal = null; |
| 877 | $inComment = false; |
| 878 | $blockDepth = 0; |
| 879 | $blockStack = []; |
| 880 | $parseGroups = []; |
| 881 | $startPos = $this->pos; |
| 882 | $lastPos = $this->pos; |
| 883 | $i = $this->pos; |
| 884 | $loop = true; |
| 885 | if ( is_string( $tok ) ) { |
| 886 | $testChar = static function ( $char ) use ( $tok ) { |
| 887 | return $tok === $char; |
| 888 | }; |
| 889 | } else { |
| 890 | $testChar = static function ( $char ) use ( $tok ) { |
| 891 | return in_array( $char, $tok ); |
| 892 | }; |
| 893 | } |
| 894 | do { |
| 895 | $nextChar = $this->input[$i]; |
| 896 | if ( $blockDepth === 0 && $testChar( $nextChar ) ) { |
| 897 | $returnVal = substr( $this->input, $lastPos, $i - $lastPos ); |
| 898 | if ( $returnVal ) { |
| 899 | $parseGroups[] = $returnVal; |
| 900 | } else { |
| 901 | $parseGroups[] = ' '; |
| 902 | } |
| 903 | $returnVal = $parseGroups; |
| 904 | $this->skipWhitespace( $i - $startPos ); |
| 905 | $loop = false; |
| 906 | } else { |
| 907 | if ( $inComment ) { |
| 908 | if ( $nextChar === '*' && ( $this->input[$i + 1] ?? '' ) === '/' ) { |
| 909 | $i++; |
| 910 | $blockDepth--; |
| 911 | $inComment = false; |
| 912 | } |
| 913 | $i++; |
| 914 | continue; |
| 915 | } |
| 916 | switch ( $nextChar ) { |
| 917 | case '\\': |
| 918 | $i++; |
| 919 | $nextChar = $this->input[$i] ?? ''; |
| 920 | $parseGroups[] = substr( $this->input, $lastPos, $i - $lastPos + 1 ); |
| 921 | $lastPos = $i + 1; |
| 922 | break; |
| 923 | case '/': |
| 924 | if ( ( $this->input[$i + 1] ?? '' ) === '*' ) { |
| 925 | $i++; |
| 926 | $inComment = true; |
| 927 | $blockDepth++; |
| 928 | } |
| 929 | break; |
| 930 | case '\'': |
| 931 | case '"': |
| 932 | $quote = $this->parseQuoted( $i ); |
| 933 | if ( $quote ) { |
| 934 | $parseGroups[] = substr( $this->input, $lastPos, $i - $lastPos ); |
| 935 | $parseGroups[] = $quote; |
| 936 | $i += strlen( $quote[1] ) - 1; |
| 937 | $lastPos = $i + 1; |
| 938 | } else { |
| 939 | $this->skipWhitespace( $i - $startPos ); |
| 940 | $returnVal = $nextChar; |
| 941 | $loop = false; |
| 942 | } |
| 943 | break; |
| 944 | case '{': |
| 945 | $blockStack[] = '}'; |
| 946 | $blockDepth++; |
| 947 | break; |
| 948 | case '(': |
| 949 | $blockStack[] = ')'; |
| 950 | $blockDepth++; |
| 951 | break; |
| 952 | case '[': |
| 953 | $blockStack[] = ']'; |
| 954 | $blockDepth++; |
| 955 | break; |
| 956 | case '}': |
| 957 | case ')': |
| 958 | case ']': |
| 959 | $expected = array_pop( $blockStack ); |
| 960 | if ( $nextChar === $expected ) { |
| 961 | $blockDepth--; |
| 962 | } else { |
| 963 | // move the parser to the error and return expected; |
| 964 | $this->skipWhitespace( $i - $startPos ); |
| 965 | $returnVal = $expected; |
| 966 | $loop = false; |
| 967 | } |
| 968 | } |
| 969 | $i++; |
| 970 | if ( $i > $this->input_len ) { |
| 971 | $loop = false; |
| 972 | } |
| 973 | } |
| 974 | } while ( $loop ); |
| 975 | |
| 976 | return $returnVal ?: null; |
| 977 | } |
| 978 | |
| 979 | /** |
| 980 | * Same as match(), but don't change the state of the parser, |
| 981 | * just return the match. |
| 982 | * |
| 983 | * @param string $tok |
| 984 | * @return int|false |
| 985 | */ |
| 986 | private function peekReg( $tok ) { |
| 987 | return preg_match( $tok, $this->input, $match, 0, $this->pos ); |
| 988 | } |
| 989 | |
| 990 | /** |
| 991 | * @param string $tok |
| 992 | */ |
| 993 | private function peekChar( $tok ) { |
| 994 | return ( $this->pos < $this->input_len ) && ( $this->input[$this->pos] === $tok ); |
| 995 | } |
| 996 | |
| 997 | /** |
| 998 | * @param int $length |
| 999 | * @see less-2.5.3.js#skipWhitespace |
| 1000 | */ |
| 1001 | private function skipWhitespace( $length ) { |
| 1002 | $this->pos += $length; |
| 1003 | |
| 1004 | for ( ; $this->pos < $this->input_len; $this->pos++ ) { |
| 1005 | $currentChar = $this->input[$this->pos]; |
| 1006 | |
| 1007 | if ( $this->autoCommentAbsorb && $currentChar === '/' ) { |
| 1008 | $nextChar = $this->input[$this->pos + 1] ?? ''; |
| 1009 | if ( $nextChar === '/' ) { |
| 1010 | $comment = [ 'index' => $this->pos, 'isLineComment' => true ]; |
| 1011 | $nextNewLine = strpos( $this->input, "\n", $this->pos + 2 ); |
| 1012 | if ( $nextNewLine === false ) { |
| 1013 | $nextNewLine = $this->input_len ?? 0; |
| 1014 | } |
| 1015 | $this->pos = $nextNewLine; |
| 1016 | $comment['text'] = substr( $this->input, $this->pos, $nextNewLine - $this->pos ); |
| 1017 | $this->commentStore[] = $comment; |
| 1018 | continue; |
| 1019 | } elseif ( $nextChar === '*' ) { |
| 1020 | $nextStarSlash = strpos( $this->input, "*/", $this->pos + 2 ); |
| 1021 | if ( $nextStarSlash !== false ) { |
| 1022 | $comment = [ |
| 1023 | 'index' => $this->pos, |
| 1024 | 'text' => substr( $this->input, $this->pos, $nextStarSlash + 2 - |
| 1025 | $this->pos ), |
| 1026 | 'isLineComment' => false, |
| 1027 | ]; |
| 1028 | $this->pos += strlen( $comment['text'] ) - 1; |
| 1029 | $this->commentStore[] = $comment; |
| 1030 | continue; |
| 1031 | } |
| 1032 | } |
| 1033 | break; |
| 1034 | } |
| 1035 | |
| 1036 | // Optimization: Skip over irrelevant chars without slow loop |
| 1037 | $skip = strspn( $this->input, " \n\t\r", $this->pos ); |
| 1038 | if ( $skip ) { |
| 1039 | $this->pos += $skip - 1; |
| 1040 | } |
| 1041 | if ( !$skip && $this->pos < $this->input_len ) { |
| 1042 | break; |
| 1043 | } |
| 1044 | } |
| 1045 | } |
| 1046 | |
| 1047 | /** |
| 1048 | * Parse a token from a regexp or method name string |
| 1049 | * |
| 1050 | * @param string $tok |
| 1051 | * @param string|null $msg |
| 1052 | * @see less-2.5.3.js#Parser.expect |
| 1053 | */ |
| 1054 | private function expect( $tok, $msg = null ) { |
| 1055 | if ( $tok[0] === '/' ) { |
| 1056 | $result = $this->matchReg( $tok ); |
| 1057 | } else { |
| 1058 | $result = $this->$tok(); |
| 1059 | } |
| 1060 | if ( $result !== null ) { |
| 1061 | return $result; |
| 1062 | } |
| 1063 | $this->Error( $msg ? "Expected '" . $tok . "' got '" . $this->input[$this->pos] . "'" : $msg ); |
| 1064 | } |
| 1065 | |
| 1066 | /** |
| 1067 | * @param string $tok |
| 1068 | * @param string|null $msg |
| 1069 | */ |
| 1070 | private function expectChar( $tok, $msg = null ) { |
| 1071 | $result = $this->matchChar( $tok ); |
| 1072 | if ( !$result ) { |
| 1073 | $msg = $msg ?: "Expected '" . $tok . "' got '" . $this->input[$this->pos] . "'"; |
| 1074 | $this->Error( $msg ); |
| 1075 | } else { |
| 1076 | return $result; |
| 1077 | } |
| 1078 | } |
| 1079 | |
| 1080 | /** |
| 1081 | * @param string $str |
| 1082 | * @see less-3.13.1.js#ParserInput.start |
| 1083 | */ |
| 1084 | private function parserInputStart( $str ) { |
| 1085 | $this->pos = $this->furthest = 0; |
| 1086 | $this->input = $str; |
| 1087 | $this->input_len = strlen( $str ); |
| 1088 | $this->skipWhitespace( 0 ); |
| 1089 | } |
| 1090 | |
| 1091 | /** |
| 1092 | * Used after initial parsing to create nodes on the fly |
| 1093 | * |
| 1094 | * @param string $str string to parse |
| 1095 | * @param string[] $parseList array of parsers to run input through e.g. ["value", "important"] |
| 1096 | * @param int $currentIndex start number to begin indexing |
| 1097 | * @param array $fileInfo fileInfo to attach to created nodes |
| 1098 | * @return array |
| 1099 | * @see less-3.13.1.js#Parser.parseNode |
| 1100 | */ |
| 1101 | public function parseNode( $str, array $parseList, $currentIndex, $fileInfo ) { |
| 1102 | $returnNodes = []; |
| 1103 | try { |
| 1104 | $this->parserInputStart( $str ); |
| 1105 | foreach ( $parseList as $p ) { |
| 1106 | $i = $this->pos; |
| 1107 | $method = 'parse' . ucfirst( $p ); |
| 1108 | if ( !method_exists( $this, $method ) ) { |
| 1109 | throw new CompileError( 'Unknown parser ' . $p ); |
| 1110 | } |
| 1111 | $result = $this->$method(); |
| 1112 | if ( $result ) { |
| 1113 | $result->index = $i + $currentIndex; |
| 1114 | $result->currentFileInfo = $fileInfo; |
| 1115 | $returnNodes[] = $result; |
| 1116 | } else { |
| 1117 | $returnNodes[] = null; |
| 1118 | } |
| 1119 | } |
| 1120 | if ( $this->pos >= $this->input_len ) { |
| 1121 | return [ null, $returnNodes ]; |
| 1122 | } else { |
| 1123 | return [ true, null ]; |
| 1124 | } |
| 1125 | } catch ( Less_Exception_Parser $e ) { |
| 1126 | throw new Less_Exception_Parser( |
| 1127 | $e->getMessage(), |
| 1128 | $e, |
| 1129 | ( $e->index ?? 0 ) + $currentIndex, |
| 1130 | $fileInfo |
| 1131 | ); |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | // |
| 1136 | // Here in, the parsing rules/functions |
| 1137 | // |
| 1138 | // The basic structure of the syntax tree generated is as follows: |
| 1139 | // |
| 1140 | // Ruleset -> Declaration -> Value -> Expression -> Entity |
| 1141 | // |
| 1142 | // Here's some LESS code: |
| 1143 | // |
| 1144 | // .class { |
| 1145 | // color: #fff; |
| 1146 | // border: 1px solid #000; |
| 1147 | // width: @w + 4px; |
| 1148 | // > .child {...} |
| 1149 | // } |
| 1150 | // |
| 1151 | // And here's what the parse tree might look like: |
| 1152 | // |
| 1153 | // Ruleset (Selector '.class', [ |
| 1154 | // Declaration ("color", Value ([Expression [Color #fff]])) |
| 1155 | // Declaration ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]])) |
| 1156 | // Declaration ("width", Value ([Expression [Operation "+" [Variable "@w"][Dimension 4px]]])) |
| 1157 | // Ruleset (Selector [Element '>', '.child'], [...]) |
| 1158 | // ]) |
| 1159 | // |
| 1160 | // In general, most rules will try to parse a token with the `$()` function, and if the return |
| 1161 | // value is truly, will return a new node, of the relevant type. Sometimes, we need to check |
| 1162 | // first, before parsing, that's when we use `peek()`. |
| 1163 | // |
| 1164 | |
| 1165 | // |
| 1166 | // The `primary` rule is the *entry* and *exit* point of the parser. |
| 1167 | // The rules here can appear at any level of the parse tree. |
| 1168 | // |
| 1169 | // The recursive nature of the grammar is an interplay between the `block` |
| 1170 | // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule, |
| 1171 | // as represented by this simplified grammar: |
| 1172 | // |
| 1173 | // primary → (ruleset | declaration )+ |
| 1174 | // ruleset → selector+ block |
| 1175 | // block → '{' primary '}' |
| 1176 | // |
| 1177 | // Only at one point is the primary rule not called from the |
| 1178 | // block rule: at the root level. |
| 1179 | // |
| 1180 | // @see less-2.5.3.js#parsers.primary |
| 1181 | private function parsePrimary() { |
| 1182 | $root = []; |
| 1183 | |
| 1184 | while ( true ) { |
| 1185 | |
| 1186 | while ( true ) { |
| 1187 | $node = $this->parseComment(); |
| 1188 | if ( !$node ) { |
| 1189 | break; |
| 1190 | } |
| 1191 | $root[] = $node; |
| 1192 | } |
| 1193 | |
| 1194 | // always process comments before deciding if finished |
| 1195 | if ( $this->pos >= $this->input_len ) { |
| 1196 | break; |
| 1197 | } |
| 1198 | |
| 1199 | if ( $this->peekChar( '}' ) ) { |
| 1200 | break; |
| 1201 | } |
| 1202 | |
| 1203 | $node = $this->parseExtend( true ); |
| 1204 | if ( $node ) { |
| 1205 | $root = array_merge( $root, $node ); |
| 1206 | continue; |
| 1207 | } |
| 1208 | |
| 1209 | $node = $this->parseMixinDefinition() |
| 1210 | // Optimisation: NameValue is specific to less.php |
| 1211 | /** |
| 1212 | * TODO enabling $this->parseNameValue causes property-accessors to fail with |
| 1213 | * |
| 1214 | * 'error evaluating function `lighten` The first argument to lighten must be a |
| 1215 | * color index: 146 in property-accessors.less on line 9, |
| 1216 | * |
| 1217 | * note: the Less_Tree_NameValue specifies that it may break color keyword |
| 1218 | * interpretation |
| 1219 | */ |
| 1220 | // ?? $this->parseNameValue() |
| 1221 | ?? $this->parseDeclaration() |
| 1222 | ?? $this->parseRuleset() |
| 1223 | ?? $this->parseMixinCall( false, false ) |
| 1224 | ?? $this->parseVariableCall() |
| 1225 | ?? $this->parseAtRule(); |
| 1226 | |
| 1227 | if ( $node ) { |
| 1228 | $root[] = $node; |
| 1229 | } elseif ( !$this->matchReg( '/\\G[\s\n;]+/' ) ) { |
| 1230 | break; |
| 1231 | } |
| 1232 | |
| 1233 | } |
| 1234 | |
| 1235 | return $root; |
| 1236 | } |
| 1237 | |
| 1238 | /** |
| 1239 | * comments are collected by the main parsing mechanism and then assigned to nodes |
| 1240 | * where the current structure allows it |
| 1241 | * |
| 1242 | * @return Less_Tree_Comment|void |
| 1243 | * @see less-2.5.3.js#parsers.comment |
| 1244 | */ |
| 1245 | private function parseComment() { |
| 1246 | $comment = array_shift( $this->commentStore ); |
| 1247 | if ( $comment ) { |
| 1248 | return new Less_Tree_Comment( |
| 1249 | $comment['text'], |
| 1250 | $comment['isLineComment'], |
| 1251 | $comment['index'], |
| 1252 | $this->env->currentFileInfo |
| 1253 | ); |
| 1254 | } |
| 1255 | } |
| 1256 | |
| 1257 | /** |
| 1258 | * @see less-3.13.1.js#parsers.entities.mixinLookup |
| 1259 | */ |
| 1260 | private function parseEntitiesMixinLookup() { |
| 1261 | return $this->parseMixinCall( true, true ); |
| 1262 | } |
| 1263 | |
| 1264 | /** |
| 1265 | * A string, which supports escaping " and ' |
| 1266 | * |
| 1267 | * "milky way" 'he\'s the one!' |
| 1268 | * |
| 1269 | * @return Less_Tree_Quoted|null |
| 1270 | * @see less-3.13.1.js#entities.quoted |
| 1271 | */ |
| 1272 | private function parseEntitiesQuoted( $forceEscaped = false ) { |
| 1273 | // Optimization: Inline matchChar() here, with its skipWhitespace(1) call below |
| 1274 | $isEscaped = ( $this->input[ $this->pos ] ?? null ) === '~'; |
| 1275 | $index = $this->pos; |
| 1276 | if ( $forceEscaped && !$isEscaped ) { |
| 1277 | return; |
| 1278 | } |
| 1279 | // Optimization: Move save() down to avoid save()+restore() |
| 1280 | // overhead during the early return above which is a hot code path. |
| 1281 | $this->save(); |
| 1282 | if ( $isEscaped ) { |
| 1283 | $this->skipWhitespace( 1 ); |
| 1284 | } |
| 1285 | |
| 1286 | $str = $this->parseQuoted(); |
| 1287 | if ( !$str ) { |
| 1288 | $this->restore(); |
| 1289 | return; |
| 1290 | } |
| 1291 | $this->forget(); |
| 1292 | return new Less_Tree_Quoted( $str[0], substr( $str, 1, -1 ), $isEscaped, |
| 1293 | $index, $this->env->currentFileInfo ); |
| 1294 | } |
| 1295 | |
| 1296 | /** |
| 1297 | * A catch-all word, such as: |
| 1298 | * |
| 1299 | * black border-collapse |
| 1300 | * |
| 1301 | * @return Less_Tree_Keyword|Less_Tree_Color|null |
| 1302 | */ |
| 1303 | private function parseEntitiesKeyword() { |
| 1304 | // $k = $this->matchReg('/\\G\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/'); |
| 1305 | $k = $this->matchReg( '/\\G%|\\G\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/' ); |
| 1306 | if ( $k ) { |
| 1307 | $color = Less_Tree_Color::fromKeyword( $k ); |
| 1308 | if ( $color ) { |
| 1309 | return $color; |
| 1310 | } |
| 1311 | return new Less_Tree_Keyword( $k ); |
| 1312 | } |
| 1313 | } |
| 1314 | |
| 1315 | // |
| 1316 | // A function call |
| 1317 | // |
| 1318 | // rgb(255, 0, 255) |
| 1319 | // |
| 1320 | // We also try to catch IE's `alpha()`, but let the `alpha` parser |
| 1321 | // deal with the details. |
| 1322 | // |
| 1323 | // The arguments are parsed with the `entities.arguments` parser. |
| 1324 | // |
| 1325 | // @see less-2.5.3.js#parsers.entities.call |
| 1326 | private function parseEntitiesCall() { |
| 1327 | $index = $this->pos; |
| 1328 | |
| 1329 | if ( $this->peekReg( '/\\Gurl\(/i' ) ) { |
| 1330 | return; |
| 1331 | } |
| 1332 | |
| 1333 | $this->save(); |
| 1334 | |
| 1335 | $name = $this->matchReg( '/\\G([\w-]+|%|progid:[\w\.]+)\(/' ); |
| 1336 | if ( !$name ) { |
| 1337 | $this->forget(); |
| 1338 | return; |
| 1339 | } |
| 1340 | |
| 1341 | $name = $name[1]; |
| 1342 | $nameLC = strtolower( $name ); |
| 1343 | |
| 1344 | if ( $nameLC === 'alpha' ) { |
| 1345 | $alpha_ret = $this->parseAlpha(); |
| 1346 | if ( $alpha_ret ) { |
| 1347 | return $alpha_ret; |
| 1348 | } |
| 1349 | } |
| 1350 | |
| 1351 | $args = $this->parseEntitiesArguments(); |
| 1352 | |
| 1353 | if ( !$this->matchChar( ')' ) ) { |
| 1354 | $this->restore(); |
| 1355 | return; |
| 1356 | } |
| 1357 | |
| 1358 | $this->forget(); |
| 1359 | return new Less_Tree_Call( $name, $args, $index, $this->env->currentFileInfo ); |
| 1360 | } |
| 1361 | |
| 1362 | /** |
| 1363 | * Parse a list of arguments |
| 1364 | * |
| 1365 | * @return array<Less_Tree_Assignment|Less_Tree_Expression> |
| 1366 | */ |
| 1367 | private function parseEntitiesArguments() { |
| 1368 | $args = []; |
| 1369 | while ( true ) { |
| 1370 | $arg = $this->parseEntitiesAssignment() ?? $this->parseExpression(); |
| 1371 | if ( !$arg ) { |
| 1372 | break; |
| 1373 | } |
| 1374 | |
| 1375 | $args[] = $arg; |
| 1376 | if ( !$this->matchChar( ',' ) ) { |
| 1377 | break; |
| 1378 | } |
| 1379 | } |
| 1380 | return $args; |
| 1381 | } |
| 1382 | |
| 1383 | /** @return Less_Tree_Dimension|Less_Tree_Color|Less_Tree_Quoted|Less_Tree_UnicodeDescriptor|null */ |
| 1384 | private function parseEntitiesLiteral() { |
| 1385 | return $this->parseEntitiesDimension() ?? $this->parseEntitiesColor() ?? $this->parseEntitiesQuoted() ?? $this->parseUnicodeDescriptor(); |
| 1386 | } |
| 1387 | |
| 1388 | /** |
| 1389 | * Assignments are argument entities for calls. |
| 1390 | * |
| 1391 | * They are present in IE filter properties as shown below. |
| 1392 | * |
| 1393 | * filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* ) |
| 1394 | * |
| 1395 | * @return Less_Tree_Assignment|null |
| 1396 | * @see less-2.5.3.js#parsers.entities.assignment |
| 1397 | */ |
| 1398 | private function parseEntitiesAssignment() { |
| 1399 | $key = $this->matchReg( '/\\G\w+(?=\s?=)/' ); |
| 1400 | if ( !$key ) { |
| 1401 | return; |
| 1402 | } |
| 1403 | |
| 1404 | if ( !$this->matchChar( '=' ) ) { |
| 1405 | return; |
| 1406 | } |
| 1407 | |
| 1408 | $value = $this->parseEntity(); |
| 1409 | if ( $value ) { |
| 1410 | return new Less_Tree_Assignment( $key, $value ); |
| 1411 | } |
| 1412 | } |
| 1413 | |
| 1414 | // |
| 1415 | // Parse url() tokens |
| 1416 | // |
| 1417 | // We use a specific rule for urls, because they don't really behave like |
| 1418 | // standard function calls. The difference is that the argument doesn't have |
| 1419 | // to be enclosed within a string, so it can't be parsed as an Expression. |
| 1420 | // |
| 1421 | private function parseEntitiesUrl() { |
| 1422 | $char = $this->input[$this->pos] ?? null; |
| 1423 | |
| 1424 | $this->autoCommentAbsorb = false; |
| 1425 | // Optimisation: 'u' check is specific to less.php |
| 1426 | if ( $char !== 'u' || !$this->matchReg( '/\\Gurl\(/' ) ) { |
| 1427 | $this->autoCommentAbsorb = true; |
| 1428 | return; |
| 1429 | } |
| 1430 | |
| 1431 | $value = $this->parseEntitiesQuoted() |
| 1432 | ?? $this->parseEntitiesVariable() |
| 1433 | ?? $this->parseEntitiesProperty() |
| 1434 | ?? $this->matchReg( '/\\Gdata\:.*?[^\)]+/' ) // TODO less doesn't handle this |
| 1435 | ?? $this->matchReg( '/\\G(?:(?:\\\\[\(\)\'"])|[^\(\)\'"])+/' ) |
| 1436 | ?? null; |
| 1437 | |
| 1438 | if ( !$value ) { |
| 1439 | $value = ''; |
| 1440 | } |
| 1441 | $this->autoCommentAbsorb = true; |
| 1442 | $this->expectChar( ')' ); |
| 1443 | |
| 1444 | if ( $value instanceof Less_Tree_Quoted |
| 1445 | || $value instanceof Less_Tree_Variable |
| 1446 | || $value instanceof Less_Tree_Property ) { |
| 1447 | return new Less_Tree_Url( $value, $this->env->currentFileInfo ); |
| 1448 | } |
| 1449 | |
| 1450 | return new Less_Tree_Url( new Less_Tree_Anonymous( $value ), $this->env->currentFileInfo ); |
| 1451 | } |
| 1452 | |
| 1453 | /** |
| 1454 | * A Variable entity, such as `@fink`, in |
| 1455 | * |
| 1456 | * width: @fink + 2px |
| 1457 | * |
| 1458 | * We use a different parser for variable definitions, |
| 1459 | * see `parsers.variable`. |
| 1460 | * |
| 1461 | * @return Less_Tree_Variable|Less_Tree_VariableCall|Less_Tree_NamespaceValue|null |
| 1462 | * @see less-3.13.1.js#parsers.entities.variable |
| 1463 | */ |
| 1464 | private function parseEntitiesVariable() { |
| 1465 | $index = $this->pos; |
| 1466 | $this->save(); |
| 1467 | |
| 1468 | if ( $this->peekChar( '@' ) ) { |
| 1469 | $name = $this->matchReg( '/\\G@@?[\w-]+/' ); |
| 1470 | if ( $name ) { |
| 1471 | $ch = $this->input[ $this->pos ] ?? ''; |
| 1472 | $prevChar = $this->input[ $this->pos - 1 ] ?? ''; |
| 1473 | if ( $ch === '(' || ( $ch === '[' && !preg_match( '/\s/', $prevChar, $match ) ) ) { |
| 1474 | // this may be a VariableCall lookup |
| 1475 | $result = $this->parseVariableCall( $name ); |
| 1476 | if ( $result ) { |
| 1477 | $this->forget(); |
| 1478 | return $result; |
| 1479 | } |
| 1480 | } |
| 1481 | $this->forget(); |
| 1482 | return new Less_Tree_Variable( $name, $index, $this->env->currentFileInfo ); |
| 1483 | } |
| 1484 | } |
| 1485 | |
| 1486 | $this->restore(); |
| 1487 | } |
| 1488 | |
| 1489 | /** |
| 1490 | * A variable entity using the protective `{}` e.g. `@{var}`. |
| 1491 | * |
| 1492 | * @return Less_Tree_Variable|null |
| 1493 | */ |
| 1494 | private function parseEntitiesVariableCurly() { |
| 1495 | $index = $this->pos; |
| 1496 | |
| 1497 | if ( $this->input_len > ( $this->pos + 1 ) && $this->input[$this->pos] === '@' ) { |
| 1498 | $curly = $this->matchReg( '/\\G@\{([\w-]+)\}/' ); |
| 1499 | if ( $curly ) { |
| 1500 | return new Less_Tree_Variable( '@' . $curly[1], $index, $this->env->currentFileInfo ); |
| 1501 | } |
| 1502 | } |
| 1503 | } |
| 1504 | |
| 1505 | /** |
| 1506 | * A Property accessor, such as `$color`, in |
| 1507 | * |
| 1508 | * background-color: $color |
| 1509 | */ |
| 1510 | private function parseEntitiesProperty() { |
| 1511 | $index = $this->pos; |
| 1512 | |
| 1513 | if ( ( $this->input[$this->pos] ?? '' ) === '$' ) { |
| 1514 | $name = $this->matchReg( '/\\G\$[\w-]+/' ); |
| 1515 | if ( $name ) { |
| 1516 | return new Less_Tree_Property( $name, $index, $this->env->currentFileInfo ); |
| 1517 | } |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | // A property entity useing the protective {} e.g. @{prop} |
| 1522 | private function parseEntitiesPropertyCurly() { |
| 1523 | $index = $this->pos; |
| 1524 | |
| 1525 | if ( $this->input[$this->pos] === '$' ) { |
| 1526 | $curly = $this->matchReg( '/\\G@\{([\w-]+)\}/' ); |
| 1527 | if ( $curly ) { |
| 1528 | return new Less_Tree_Property( "$" . $curly[1], $index, $this->env->currentFileInfo ); |
| 1529 | } |
| 1530 | } |
| 1531 | } |
| 1532 | |
| 1533 | /** |
| 1534 | * A Hexadecimal color |
| 1535 | * |
| 1536 | * #4F3C2F |
| 1537 | * |
| 1538 | * `rgb` and `hsl` colors are parsed through the `entities.call` parser. |
| 1539 | * |
| 1540 | * @return Less_Tree_Color|null |
| 1541 | */ |
| 1542 | private function parseEntitiesColor() { |
| 1543 | if ( $this->peekChar( '#' ) ) { |
| 1544 | $rgb = $this->matchReg( '/\\G#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/' ); |
| 1545 | if ( $rgb ) { |
| 1546 | return new Less_Tree_Color( $rgb[1], 1, null, $rgb[0] ); |
| 1547 | } |
| 1548 | } |
| 1549 | } |
| 1550 | |
| 1551 | /** |
| 1552 | * A Dimension, that is, a number and a unit |
| 1553 | * |
| 1554 | * 0.5em 95% |
| 1555 | * |
| 1556 | * @return Less_Tree_Dimension|null |
| 1557 | */ |
| 1558 | private function parseEntitiesDimension() { |
| 1559 | $c = @ord( $this->input[$this->pos] ?? '' ); |
| 1560 | |
| 1561 | // Is the first char of the dimension 0-9, '.', '+' or '-' |
| 1562 | if ( ( $c > 57 || $c < 43 ) || $c === 47 || $c == 44 ) { |
| 1563 | return; |
| 1564 | } |
| 1565 | |
| 1566 | $value = $this->matchReg( '/\\G([+-]?\d*\.?\d+)(%|[a-z]+)?/i' ); |
| 1567 | if ( $value ) { |
| 1568 | if ( isset( $value[2] ) ) { |
| 1569 | return new Less_Tree_Dimension( $value[1], $value[2] ); |
| 1570 | } |
| 1571 | return new Less_Tree_Dimension( $value[1] ); |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | /** |
| 1576 | * A unicode descriptor, as is used in unicode-range |
| 1577 | * |
| 1578 | * U+0?? or U+00A1-00A9 |
| 1579 | * |
| 1580 | * @return Less_Tree_UnicodeDescriptor|null |
| 1581 | */ |
| 1582 | private function parseUnicodeDescriptor() { |
| 1583 | // Optimization: Hardcode first char, to avoid matchReg() cost for common case |
| 1584 | $char = $this->input[$this->pos] ?? null; |
| 1585 | if ( $char !== 'U' ) { |
| 1586 | return; |
| 1587 | } |
| 1588 | |
| 1589 | $ud = $this->matchReg( '/\\G(U\+[0-9a-fA-F?]+)(\-[0-9a-fA-F?]+)?/' ); |
| 1590 | if ( $ud ) { |
| 1591 | return new Less_Tree_UnicodeDescriptor( $ud[0] ); |
| 1592 | } |
| 1593 | } |
| 1594 | |
| 1595 | /** |
| 1596 | * JavaScript code to be evaluated |
| 1597 | * |
| 1598 | * `window.location.href` |
| 1599 | * |
| 1600 | * @return Less_Tree_JavaScript|null |
| 1601 | * @see less-3.13.1.js#parsers.entities.javascript |
| 1602 | */ |
| 1603 | private function parseEntitiesJavascript() { |
| 1604 | // Optimization: Hardcode first char, to avoid save()/restore() overhead |
| 1605 | // Optimization: Inline matchChar(), with skipWhitespace(1) below |
| 1606 | $char = $this->input[$this->pos] ?? null; |
| 1607 | $isEscaped = $char === '~'; |
| 1608 | if ( !$isEscaped && $char !== '`' ) { |
| 1609 | return; |
| 1610 | } |
| 1611 | |
| 1612 | $index = $this->pos; |
| 1613 | $this->save(); |
| 1614 | |
| 1615 | if ( $isEscaped ) { |
| 1616 | $this->skipWhitespace( 1 ); |
| 1617 | $char = $this->input[$this->pos] ?? null; |
| 1618 | if ( $char !== '`' ) { |
| 1619 | $this->restore(); |
| 1620 | return; |
| 1621 | } |
| 1622 | } |
| 1623 | |
| 1624 | $this->skipWhitespace( 1 ); |
| 1625 | $js = $this->matchReg( '/\\G[^`]*`/' ); |
| 1626 | if ( $js ) { |
| 1627 | $this->forget(); |
| 1628 | return new Less_Tree_JavaScript( substr( $js, 0, -1 ), $isEscaped, $index ); |
| 1629 | } |
| 1630 | $this->restore(); |
| 1631 | } |
| 1632 | |
| 1633 | // The variable part of a variable definition. Used in the `rule` parser |
| 1634 | // |
| 1635 | // @fink: |
| 1636 | // |
| 1637 | // @see less-3.13.1.js#parsers.variable |
| 1638 | private function parseVariable() { |
| 1639 | if ( $this->peekChar( '@' ) ) { |
| 1640 | $name = $this->matchReg( '/\\G(@[\w-]+)\s*:/' ); |
| 1641 | if ( $name ) { |
| 1642 | return $name[1]; |
| 1643 | } |
| 1644 | } |
| 1645 | } |
| 1646 | |
| 1647 | // Call a variable value to retrieve a detached ruleset |
| 1648 | // or a value from a detached ruleset's rules. |
| 1649 | // |
| 1650 | // @fink(); |
| 1651 | // @fink; |
| 1652 | // color: @fink[@color]; |
| 1653 | // |
| 1654 | // @see less-3.13.1.js#parsers.variableCall |
| 1655 | private function parseVariableCall( $parsedName = null ) { |
| 1656 | $i = $this->pos; |
| 1657 | $inValue = (bool)$parsedName; |
| 1658 | |
| 1659 | if ( $parsedName === null && !$this->peekChar( '@' ) ) { |
| 1660 | return; |
| 1661 | } |
| 1662 | $this->save(); |
| 1663 | $name = $parsedName ?? $this->matchReg( '/\\G(@[\w-]+)(\(\s*\))?/' ); |
| 1664 | if ( $name === null ) { |
| 1665 | $this->restore(); |
| 1666 | return; |
| 1667 | } |
| 1668 | |
| 1669 | $lookups = $this->parseMixinRuleLookups(); |
| 1670 | if ( !$lookups && ( |
| 1671 | ( $inValue && $this->matchStr( '()' ) !== '()' ) || ( ( $name[2] ?? '' ) !== '()' ) ) ) { |
| 1672 | // Restore error mesage: 'Missing \'[...]\' lookup in variable call' |
| 1673 | $this->restore(); |
| 1674 | return; |
| 1675 | } |
| 1676 | if ( !$inValue ) { |
| 1677 | $name = $name[1]; |
| 1678 | } |
| 1679 | |
| 1680 | $call = new Less_Tree_VariableCall( $name, $i, $this->env->currentFileInfo ); |
| 1681 | if ( !$inValue && $this->parseEnd() ) { |
| 1682 | $this->forget(); |
| 1683 | return $call; |
| 1684 | } else { |
| 1685 | $this->forget(); |
| 1686 | return new Less_Tree_NamespaceValue( $call, $lookups, $i, $this->env->currentFileInfo ); |
| 1687 | } |
| 1688 | } |
| 1689 | |
| 1690 | // |
| 1691 | // extend syntax - used to extend selectors |
| 1692 | // |
| 1693 | // @see less-2.5.3.js#parsers.extend |
| 1694 | private function parseExtend( $isRule = false ) { |
| 1695 | $index = $this->pos; |
| 1696 | $extendList = []; |
| 1697 | |
| 1698 | if ( !$this->matchStr( $isRule ? '&:extend(' : ':extend(' ) ) { |
| 1699 | return; |
| 1700 | } |
| 1701 | |
| 1702 | do { |
| 1703 | $option = null; |
| 1704 | $elements = []; |
| 1705 | while ( true ) { |
| 1706 | $option = $this->matchReg( '/\\G(all)(?=\s*(\)|,))/' ); |
| 1707 | if ( $option ) { |
| 1708 | break; |
| 1709 | } |
| 1710 | $e = $this->parseElement(); |
| 1711 | if ( !$e ) { |
| 1712 | break; |
| 1713 | } |
| 1714 | $elements[] = $e; |
| 1715 | } |
| 1716 | |
| 1717 | if ( $option ) { |
| 1718 | $option = $option[1]; |
| 1719 | } |
| 1720 | |
| 1721 | $extendList[] = new Less_Tree_Extend( new Less_Tree_Selector( $elements ), $option, $index ); |
| 1722 | |
| 1723 | } while ( $this->matchChar( "," ) ); |
| 1724 | |
| 1725 | $this->expect( '/\\G\)/' ); |
| 1726 | |
| 1727 | if ( $isRule ) { |
| 1728 | $this->expect( '/\\G;/' ); |
| 1729 | } |
| 1730 | |
| 1731 | return $extendList; |
| 1732 | } |
| 1733 | |
| 1734 | // |
| 1735 | // A Mixin call, with an optional argument list |
| 1736 | // |
| 1737 | // #mixins > .square(#fff); |
| 1738 | // #mixins.square(#fff); |
| 1739 | // .rounded(4px, black); |
| 1740 | // .button; |
| 1741 | // |
| 1742 | // We can lookup / return a value using the lookup syntax: |
| 1743 | // |
| 1744 | // color: #mixin.square(#fff)[@color]; |
| 1745 | // |
| 1746 | // The `while` loop is there because mixins can be |
| 1747 | // namespaced, but we only support the child and descendant |
| 1748 | // selector for now. |
| 1749 | // |
| 1750 | // @see less-3.13.1.js#parsers.mixin.call |
| 1751 | // |
| 1752 | private function parseMixinCall( $inValue, $getLookup = null ) { |
| 1753 | $s = $this->input[$this->pos] ?? null; |
| 1754 | $important = false; |
| 1755 | $lookups = null; |
| 1756 | $index = $this->pos; |
| 1757 | $args = []; |
| 1758 | $hasParens = false; |
| 1759 | if ( $s !== '.' && $s !== '#' ) { |
| 1760 | return; |
| 1761 | } |
| 1762 | |
| 1763 | $this->save(); // stop us absorbing part of an invalid selector |
| 1764 | $elements = $this->parseMixinCallElements(); |
| 1765 | |
| 1766 | if ( $elements ) { |
| 1767 | if ( $this->matchChar( '(' ) ) { |
| 1768 | $args = ( $this->parseMixinArgs( true ) )['args']; |
| 1769 | $this->expectChar( ')' ); |
| 1770 | $hasParens = true; |
| 1771 | } |
| 1772 | if ( $getLookup !== false ) { |
| 1773 | $lookups = $this->parseMixinRuleLookups(); |
| 1774 | } |
| 1775 | if ( $getLookup === true && $lookups === null ) { |
| 1776 | $this->restore(); |
| 1777 | return; |
| 1778 | } |
| 1779 | if ( $inValue && !$lookups && !$hasParens ) { |
| 1780 | // This isn't a valid in-value mixin call |
| 1781 | $this->restore(); |
| 1782 | return; |
| 1783 | } |
| 1784 | |
| 1785 | if ( !$inValue && $this->parseImportant() ) { |
| 1786 | $important = true; |
| 1787 | } |
| 1788 | |
| 1789 | if ( $inValue || $this->parseEnd() ) { |
| 1790 | $this->forget(); |
| 1791 | $mixin = new Less_Tree_Mixin_Call( $elements, $args, $index, |
| 1792 | $this->env->currentFileInfo, !$lookups && $important ); |
| 1793 | if ( $lookups ) { |
| 1794 | return new Less_Tree_NamespaceValue( $mixin, $lookups ); |
| 1795 | } else { |
| 1796 | return $mixin; |
| 1797 | } |
| 1798 | } |
| 1799 | } |
| 1800 | |
| 1801 | $this->restore(); |
| 1802 | } |
| 1803 | |
| 1804 | /** |
| 1805 | * Matching elements for mixins |
| 1806 | * (Start with . or # and can have > ) |
| 1807 | * @see less-3.13.1.js#parsers.mixin.elements |
| 1808 | */ |
| 1809 | private function parseMixinCallElements() { |
| 1810 | $elements = []; |
| 1811 | $c = null; |
| 1812 | |
| 1813 | while ( true ) { |
| 1814 | $elemIndex = $this->pos; |
| 1815 | $e = $this->matchReg( '/\\G[#.](?:[\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/' ); |
| 1816 | if ( !$e ) { |
| 1817 | break; |
| 1818 | } |
| 1819 | $elements[] = new Less_Tree_Element( $c, $e, $elemIndex, $this->env->currentFileInfo ); |
| 1820 | $c = $this->matchChar( '>' ); |
| 1821 | } |
| 1822 | |
| 1823 | return $elements ?: null; |
| 1824 | } |
| 1825 | |
| 1826 | /** |
| 1827 | * @param bool $isCall |
| 1828 | * @see less-2.5.3.js#parsers.mixin.args |
| 1829 | */ |
| 1830 | private function parseMixinArgs( $isCall ) { |
| 1831 | $expressions = []; |
| 1832 | $argsSemiColon = []; |
| 1833 | $isSemiColonSeperated = null; |
| 1834 | $argsComma = []; |
| 1835 | $expressionContainsNamed = null; |
| 1836 | $name = null; |
| 1837 | $returner = [ 'args' => [], 'variadic' => false ]; |
| 1838 | $expand = false; |
| 1839 | |
| 1840 | $this->save(); |
| 1841 | |
| 1842 | while ( true ) { |
| 1843 | if ( $isCall ) { |
| 1844 | $arg = $this->parseDetachedRuleset() ?? $this->parseExpression(); |
| 1845 | } else { |
| 1846 | $this->commentStore = []; |
| 1847 | if ( $this->input[ $this->pos ] === '.' && $this->matchStr( '...' ) ) { |
| 1848 | $returner['variadic'] = true; |
| 1849 | if ( $this->matchChar( ";" ) && !$isSemiColonSeperated ) { |
| 1850 | $isSemiColonSeperated = true; |
| 1851 | } |
| 1852 | |
| 1853 | if ( $isSemiColonSeperated ) { |
| 1854 | $argsSemiColon[] = [ 'variadic' => true ]; |
| 1855 | } else { |
| 1856 | $argsComma[] = [ 'variadic' => true ]; |
| 1857 | } |
| 1858 | break; |
| 1859 | } |
| 1860 | $arg = $this->parseEntitiesVariable() |
| 1861 | ?? $this->parseEntitiesProperty() |
| 1862 | ?? $this->parseEntitiesLiteral() |
| 1863 | ?? $this->parseEntitiesKeyword(); |
| 1864 | } |
| 1865 | |
| 1866 | if ( !$arg ) { |
| 1867 | break; |
| 1868 | } |
| 1869 | |
| 1870 | $nameLoop = null; |
| 1871 | if ( $arg instanceof Less_Tree_Expression ) { |
| 1872 | $arg->throwAwayComments(); |
| 1873 | } |
| 1874 | $value = $arg; |
| 1875 | $val = null; |
| 1876 | |
| 1877 | if ( $isCall ) { |
| 1878 | // Variable |
| 1879 | if ( $value instanceof Less_Tree_Expression && count( $arg->value ) == 1 ) { |
| 1880 | $val = $arg->value[0]; |
| 1881 | } |
| 1882 | } else { |
| 1883 | $val = $arg; |
| 1884 | } |
| 1885 | |
| 1886 | if ( $val instanceof Less_Tree_Variable || $val instanceof Less_Tree_Property ) { |
| 1887 | |
| 1888 | if ( $this->matchChar( ':' ) ) { |
| 1889 | if ( $expressions ) { |
| 1890 | if ( $isSemiColonSeperated ) { |
| 1891 | $this->Error( 'Cannot mix ; and , as delimiter types' ); |
| 1892 | } |
| 1893 | $expressionContainsNamed = true; |
| 1894 | } |
| 1895 | |
| 1896 | // we do not support setting a ruleset as a default variable - it doesn't make sense |
| 1897 | // However if we do want to add it, there is nothing blocking it, just don't error |
| 1898 | // and remove isCall dependency below |
| 1899 | $value = $this->parseDetachedRuleset() ?? $this->parseExpression(); |
| 1900 | |
| 1901 | if ( !$value ) { |
| 1902 | if ( $isCall ) { |
| 1903 | $this->Error( 'could not understand value for named argument' ); |
| 1904 | } else { |
| 1905 | $this->restore(); |
| 1906 | $returner['args'] = []; |
| 1907 | return $returner; |
| 1908 | } |
| 1909 | } |
| 1910 | |
| 1911 | $nameLoop = ( $name = $val->name ); |
| 1912 | } elseif ( $this->matchStr( '...' ) ) { |
| 1913 | if ( !$isCall ) { |
| 1914 | $returner['variadic'] = true; |
| 1915 | if ( $this->matchChar( ";" ) && !$isSemiColonSeperated ) { |
| 1916 | $isSemiColonSeperated = true; |
| 1917 | } |
| 1918 | if ( $isSemiColonSeperated ) { |
| 1919 | $argsSemiColon[] = [ 'name' => $arg->name, 'variadic' => true ]; |
| 1920 | } else { |
| 1921 | $argsComma[] = [ 'name' => $arg->name, 'variadic' => true ]; |
| 1922 | } |
| 1923 | break; |
| 1924 | } else { |
| 1925 | $expand = true; |
| 1926 | } |
| 1927 | } elseif ( !$isCall ) { |
| 1928 | $name = $nameLoop = $val->name; |
| 1929 | $value = null; |
| 1930 | } |
| 1931 | } |
| 1932 | |
| 1933 | if ( $value ) { |
| 1934 | $expressions[] = $value; |
| 1935 | } |
| 1936 | |
| 1937 | $argsComma[] = [ 'name' => $nameLoop, 'value' => $value, 'expand' => $expand ]; |
| 1938 | |
| 1939 | if ( $this->matchChar( ',' ) ) { |
| 1940 | continue; |
| 1941 | } |
| 1942 | |
| 1943 | if ( $this->matchChar( ';' ) || $isSemiColonSeperated ) { |
| 1944 | |
| 1945 | if ( $expressionContainsNamed ) { |
| 1946 | $this->Error( 'Cannot mix ; and , as delimiter types' ); |
| 1947 | } |
| 1948 | |
| 1949 | $isSemiColonSeperated = true; |
| 1950 | |
| 1951 | if ( count( $expressions ) > 1 ) { |
| 1952 | $value = new Less_Tree_Value( $expressions ); |
| 1953 | } |
| 1954 | $argsSemiColon[] = [ 'name' => $name, 'value' => $value, 'expand' => $expand ]; |
| 1955 | |
| 1956 | $name = null; |
| 1957 | $expressions = []; |
| 1958 | $expressionContainsNamed = false; |
| 1959 | } |
| 1960 | } |
| 1961 | |
| 1962 | $this->forget(); |
| 1963 | $returner['args'] = ( $isSemiColonSeperated ? $argsSemiColon : $argsComma ); |
| 1964 | return $returner; |
| 1965 | } |
| 1966 | |
| 1967 | /** |
| 1968 | * @see less-3.13.1.js#parsers.mixin.ruleLookups |
| 1969 | */ |
| 1970 | private function parseMixinRuleLookups() { |
| 1971 | $lookups = []; |
| 1972 | |
| 1973 | if ( !$this->peekChar( '[' ) ) { |
| 1974 | return; |
| 1975 | } |
| 1976 | |
| 1977 | while ( true ) { |
| 1978 | $this->save(); |
| 1979 | $rule = $this->parseLookupValue(); |
| 1980 | if ( !$rule && $rule !== '' ) { |
| 1981 | $this->restore(); |
| 1982 | break; |
| 1983 | } |
| 1984 | $lookups[] = $rule; |
| 1985 | $this->forget(); |
| 1986 | } |
| 1987 | if ( $lookups ) { |
| 1988 | return $lookups; |
| 1989 | } |
| 1990 | } |
| 1991 | |
| 1992 | /** |
| 1993 | * @see less-3.13.1.js#parsers.mixin.lookupValue |
| 1994 | */ |
| 1995 | private function parseLookupValue() { |
| 1996 | $this->save(); |
| 1997 | |
| 1998 | if ( !$this->matchChar( '[' ) ) { |
| 1999 | $this->restore(); |
| 2000 | return; |
| 2001 | } |
| 2002 | $name = $this->matchReg( "/\\G(?:[@\$]{0,2})[_a-zA-Z0-9-]*/" ); |
| 2003 | |
| 2004 | if ( !$this->matchChar( ']' ) ) { |
| 2005 | $this->restore(); |
| 2006 | return; |
| 2007 | } |
| 2008 | if ( $name || $name === '' ) { |
| 2009 | $this->forget(); |
| 2010 | return $name; |
| 2011 | } |
| 2012 | $this->restore(); |
| 2013 | } |
| 2014 | |
| 2015 | // |
| 2016 | // A Mixin definition, with a list of parameters |
| 2017 | // |
| 2018 | // .rounded (@radius: 2px, @color) { |
| 2019 | // ... |
| 2020 | // } |
| 2021 | // |
| 2022 | // Until we have a finer grained state-machine, we have to |
| 2023 | // do a look-ahead, to make sure we don't have a mixin call. |
| 2024 | // See the `rule` function for more information. |
| 2025 | // |
| 2026 | // We start by matching `.rounded (`, and then proceed on to |
| 2027 | // the argument list, which has optional default values. |
| 2028 | // We store the parameters in `params`, with a `value` key, |
| 2029 | // if there is a value, such as in the case of `@radius`. |
| 2030 | // |
| 2031 | // Once we've got our params list, and a closing `)`, we parse |
| 2032 | // the `{...}` block. |
| 2033 | // |
| 2034 | // @see less-2.5.3.js#parsers.mixin.definition |
| 2035 | private function parseMixinDefinition() { |
| 2036 | $cond = null; |
| 2037 | |
| 2038 | $char = $this->input[$this->pos] ?? null; |
| 2039 | // TODO: Less.js doesn't limit this to $char == '{'. |
| 2040 | if ( ( $char !== '.' && $char !== '#' ) || ( $char === '{' && $this->peekReg( '/\\G[^{]*\}/' ) ) ) { |
| 2041 | return; |
| 2042 | } |
| 2043 | |
| 2044 | $this->save(); |
| 2045 | |
| 2046 | $match = $this->matchReg( '/\\G([#.](?:[\w-]|\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/' ); |
| 2047 | if ( $match ) { |
| 2048 | $name = $match[1]; |
| 2049 | |
| 2050 | $argInfo = $this->parseMixinArgs( false ); |
| 2051 | $params = $argInfo['args']; |
| 2052 | $variadic = $argInfo['variadic']; |
| 2053 | |
| 2054 | // .mixincall("@{a}"); |
| 2055 | // looks a bit like a mixin definition.. |
| 2056 | // also |
| 2057 | // .mixincall(@a: {rule: set;}); |
| 2058 | // so we have to be nice and restore |
| 2059 | if ( !$this->matchChar( ')' ) ) { |
| 2060 | $this->restore(); |
| 2061 | return; |
| 2062 | } |
| 2063 | |
| 2064 | $this->commentStore = []; |
| 2065 | |
| 2066 | if ( $this->matchStr( 'when' ) ) { // Guard |
| 2067 | $cond = $this->expect( 'parseConditions', 'Expected conditions' ); |
| 2068 | } |
| 2069 | |
| 2070 | $ruleset = $this->parseBlock(); |
| 2071 | |
| 2072 | if ( $ruleset !== null ) { |
| 2073 | $this->forget(); |
| 2074 | return new Less_Tree_Mixin_Definition( $name, $params, $ruleset, $cond, $variadic ); |
| 2075 | } |
| 2076 | |
| 2077 | $this->restore(); |
| 2078 | } else { |
| 2079 | $this->forget(); |
| 2080 | } |
| 2081 | } |
| 2082 | |
| 2083 | // |
| 2084 | // Entities are the smallest recognized token, |
| 2085 | // and can be found inside a rule's value. |
| 2086 | // |
| 2087 | private function parseEntity() { |
| 2088 | return $this->parseComment() ?? |
| 2089 | $this->parseEntitiesLiteral() ?? |
| 2090 | $this->parseEntitiesVariable() ?? |
| 2091 | $this->parseEntitiesUrl() ?? |
| 2092 | $this->parseEntitiesProperty() ?? |
| 2093 | $this->parseEntitiesCall() ?? |
| 2094 | $this->parseEntitiesKeyword() ?? |
| 2095 | $this->parseMixinCall( true ) ?? |
| 2096 | $this->parseEntitiesJavascript(); |
| 2097 | } |
| 2098 | |
| 2099 | // |
| 2100 | // A Declaration terminator. Note that we use `peek()` to check for '}', |
| 2101 | // because the `block` rule will be expecting it, but we still need to make sure |
| 2102 | // it's there, if ';' was omitted. |
| 2103 | // |
| 2104 | private function parseEnd() { |
| 2105 | return $this->matchChar( ';' ) || $this->peekChar( '}' ); |
| 2106 | } |
| 2107 | |
| 2108 | // |
| 2109 | // IE's alpha function |
| 2110 | // |
| 2111 | // alpha(opacity=88) |
| 2112 | // |
| 2113 | // @see less-2.5.3.js#parsers.alpha |
| 2114 | private function parseAlpha() { |
| 2115 | if ( !$this->matchReg( '/\\Gopacity=/i' ) ) { |
| 2116 | return; |
| 2117 | } |
| 2118 | |
| 2119 | $value = $this->matchReg( '/\\G[0-9]+/' ); |
| 2120 | if ( $value === null ) { |
| 2121 | $value = $this->expect( 'parseEntitiesVariable', 'Could not parse alpha' ); |
| 2122 | } |
| 2123 | |
| 2124 | $this->expectChar( ')' ); |
| 2125 | return new Less_Tree_Alpha( $value ); |
| 2126 | } |
| 2127 | |
| 2128 | /** |
| 2129 | * A Selector Element |
| 2130 | * |
| 2131 | * div |
| 2132 | * + h1 |
| 2133 | * #socks |
| 2134 | * input[type="text"] |
| 2135 | * |
| 2136 | * Elements are the building blocks for Selectors, |
| 2137 | * they are made out of a `Combinator` (see combinator rule), |
| 2138 | * and an element name, such as a tag a class, or `*`. |
| 2139 | * |
| 2140 | * @return Less_Tree_Element|null |
| 2141 | * @see less-2.5.3.js#parsers.element |
| 2142 | */ |
| 2143 | private function parseElement() { |
| 2144 | $c = $this->parseCombinator(); |
| 2145 | $index = $this->pos; |
| 2146 | |
| 2147 | $e = $this->matchReg( '/\\G(?:\d+\.\d+|\d+)%/' ) |
| 2148 | ?? $this->matchReg( '/\\G(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/' ) |
| 2149 | ?? $this->matchChar( '*' ) |
| 2150 | ?? $this->matchChar( '&' ) |
| 2151 | ?? $this->parseAttribute() |
| 2152 | ?? $this->matchReg( '/\\G\([^&()@]+\)/' ) |
| 2153 | ?? $this->matchReg( '/\\G[\.#:](?=@)/' ) |
| 2154 | ?? $this->parseEntitiesVariableCurly(); |
| 2155 | |
| 2156 | if ( $e === null ) { |
| 2157 | $this->save(); |
| 2158 | if ( $this->matchChar( '(' ) ) { |
| 2159 | $v = $this->parseSelector(); |
| 2160 | if ( $v && $this->matchChar( ')' ) ) { |
| 2161 | $e = new Less_Tree_Paren( $v ); |
| 2162 | $this->forget(); |
| 2163 | } else { |
| 2164 | $this->restore(); |
| 2165 | } |
| 2166 | } else { |
| 2167 | $this->forget(); |
| 2168 | } |
| 2169 | } |
| 2170 | |
| 2171 | if ( $e !== null ) { |
| 2172 | return new Less_Tree_Element( $c, $e, $index, $this->env->currentFileInfo ); |
| 2173 | } |
| 2174 | } |
| 2175 | |
| 2176 | // |
| 2177 | // Combinators combine elements together, in a Selector. |
| 2178 | // |
| 2179 | // Because our parser isn't white-space sensitive, special care |
| 2180 | // has to be taken, when parsing the descendant combinator, ` `, |
| 2181 | // as it's an empty space. We have to check the previous character |
| 2182 | // in the input, to see if it's a ` ` character. |
| 2183 | // |
| 2184 | // @see less-2.5.3.js#parsers.combinator |
| 2185 | private function parseCombinator() { |
| 2186 | if ( $this->pos < $this->input_len ) { |
| 2187 | $c = $this->input[$this->pos]; |
| 2188 | if ( $c === '/' ) { |
| 2189 | $this->save(); |
| 2190 | $slashedCombinator = $this->matchReg( '/\\G\/[a-z]+\//i' ); |
| 2191 | if ( $slashedCombinator ) { |
| 2192 | $this->forget(); |
| 2193 | return $slashedCombinator; |
| 2194 | } |
| 2195 | $this->restore(); |
| 2196 | } |
| 2197 | |
| 2198 | // TODO: Figure out why less.js also handles '/' here, and implement with regression test. |
| 2199 | if ( $c === '>' || $c === '+' || $c === '~' || $c === '|' || $c === '^' ) { |
| 2200 | |
| 2201 | $this->pos++; |
| 2202 | if ( $c === '^' && $this->input[$this->pos] === '^' ) { |
| 2203 | $c = '^^'; |
| 2204 | $this->pos++; |
| 2205 | } |
| 2206 | |
| 2207 | $this->skipWhitespace( 0 ); |
| 2208 | |
| 2209 | return $c; |
| 2210 | } |
| 2211 | |
| 2212 | if ( $this->pos > 0 && $this->isWhitespace( -1 ) ) { |
| 2213 | return ' '; |
| 2214 | } |
| 2215 | } |
| 2216 | } |
| 2217 | |
| 2218 | /** |
| 2219 | * A CSS selector (see selector below) |
| 2220 | * with less extensions e.g. the ability to extend and guard |
| 2221 | * |
| 2222 | * @return Less_Tree_Selector|null |
| 2223 | * @see less-2.5.3.js#parsers.lessSelector |
| 2224 | */ |
| 2225 | private function parseLessSelector() { |
| 2226 | return $this->parseSelector( true ); |
| 2227 | } |
| 2228 | |
| 2229 | /** |
| 2230 | * A CSS Selector |
| 2231 | * |
| 2232 | * .class > div + h1 |
| 2233 | * li a:hover |
| 2234 | * |
| 2235 | * Selectors are made out of one or more Elements, see ::parseElement. |
| 2236 | * |
| 2237 | * @return Less_Tree_Selector|null |
| 2238 | * @see less-2.5.3.js#parsers.selector |
| 2239 | */ |
| 2240 | private function parseSelector( $isLess = false ) { |
| 2241 | $elements = []; |
| 2242 | $extendList = []; |
| 2243 | $condition = null; |
| 2244 | $when = false; |
| 2245 | $extend = false; |
| 2246 | $e = null; |
| 2247 | $c = null; |
| 2248 | $index = $this->pos; |
| 2249 | |
| 2250 | // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition |
| 2251 | while ( ( $isLess && ( $extend = $this->parseExtend() ) ) || ( $isLess && ( $when = $this->matchStr( 'when' ) ) ) || ( $e = $this->parseElement() ) ) { |
| 2252 | if ( $when ) { |
| 2253 | $condition = $this->expect( 'parseConditions', 'expected condition' ); |
| 2254 | } elseif ( $condition ) { |
| 2255 | // error("CSS guard can only be used at the end of selector"); |
| 2256 | } elseif ( $extend ) { |
| 2257 | $extendList = array_merge( $extendList, $extend ); |
| 2258 | } else { |
| 2259 | // if( count($extendList) ){ |
| 2260 | //error("Extend can only be used at the end of selector"); |
| 2261 | //} |
| 2262 | if ( $this->pos < $this->input_len ) { |
| 2263 | $c = $this->input[ $this->pos ]; |
| 2264 | } |
| 2265 | $elements[] = $e; |
| 2266 | $e = null; |
| 2267 | } |
| 2268 | |
| 2269 | if ( $c === '{' || $c === '}' || $c === ';' || $c === ',' || $c === ')' ) { |
| 2270 | break; |
| 2271 | } |
| 2272 | } |
| 2273 | |
| 2274 | if ( $elements ) { |
| 2275 | return new Less_Tree_Selector( $elements, $extendList, $condition, $index, $this->env->currentFileInfo ); |
| 2276 | } |
| 2277 | if ( $extendList ) { |
| 2278 | $this->Error( 'Extend must be used to extend a selector, it cannot be used on its own' ); |
| 2279 | } |
| 2280 | } |
| 2281 | |
| 2282 | /** |
| 2283 | * @return Less_Tree_Attribute|null |
| 2284 | * @see less-2.5.3.js#parsers.attribute |
| 2285 | */ |
| 2286 | private function parseAttribute() { |
| 2287 | $val = null; |
| 2288 | |
| 2289 | if ( !$this->matchChar( '[' ) ) { |
| 2290 | return; |
| 2291 | } |
| 2292 | |
| 2293 | $key = $this->parseEntitiesVariableCurly(); |
| 2294 | if ( !$key ) { |
| 2295 | $key = $this->expect( '/\\G(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\\\.)+/' ); |
| 2296 | } |
| 2297 | |
| 2298 | $op = $this->matchReg( '/\\G[|~*$^]?=/' ); |
| 2299 | if ( $op ) { |
| 2300 | $val = $this->parseEntitiesQuoted() ?? $this->matchReg( '/\\G[0-9]+%/' ) ?? $this->matchReg( '/\\G[\w-]+/' ) ?? $this->parseEntitiesVariableCurly(); |
| 2301 | } |
| 2302 | |
| 2303 | $this->expectChar( ']' ); |
| 2304 | |
| 2305 | return new Less_Tree_Attribute( $key, $op, $val ); |
| 2306 | } |
| 2307 | |
| 2308 | /** |
| 2309 | * The `block` rule is used by `ruleset` and `mixin.definition`. |
| 2310 | * It's a wrapper around the `primary` rule, with added `{}`. |
| 2311 | * |
| 2312 | * @return array<Less_Tree>|null |
| 2313 | * @see less-2.5.3.js#parsers.block |
| 2314 | */ |
| 2315 | private function parseBlock() { |
| 2316 | if ( $this->matchChar( '{' ) ) { |
| 2317 | $content = $this->parsePrimary(); |
| 2318 | if ( $this->matchChar( '}' ) ) { |
| 2319 | return $content; |
| 2320 | } |
| 2321 | } |
| 2322 | } |
| 2323 | |
| 2324 | private function parseBlockRuleset() { |
| 2325 | $block = $this->parseBlock(); |
| 2326 | if ( $block !== null ) { |
| 2327 | return new Less_Tree_Ruleset( null, $block ); |
| 2328 | } |
| 2329 | } |
| 2330 | |
| 2331 | /** @return Less_Tree_DetachedRuleset|null */ |
| 2332 | private function parseDetachedRuleset() { |
| 2333 | $blockRuleset = $this->parseBlockRuleset(); |
| 2334 | if ( $blockRuleset ) { |
| 2335 | return new Less_Tree_DetachedRuleset( $blockRuleset ); |
| 2336 | } |
| 2337 | } |
| 2338 | |
| 2339 | /** |
| 2340 | * Ruleset such as: |
| 2341 | * |
| 2342 | * div, .class, body > p { |
| 2343 | * } |
| 2344 | * |
| 2345 | * @return Less_Tree_Ruleset|null |
| 2346 | * @see less-2.5.3.js#parsers.ruleset |
| 2347 | */ |
| 2348 | private function parseRuleset() { |
| 2349 | $selectors = []; |
| 2350 | |
| 2351 | $this->save(); |
| 2352 | // TODO: missing https://github.com/less/less.js/commit/b8140d4baad18ba732e2b322d8891a9b0ff065d5#diff-cad419f131cbecb0799ee17eba9319d3ff51de09eb3876efb9e4c068c1f6025f |
| 2353 | // the commit above updated the `permissive-parse.less` fixture worked on Id36e0f142d7f430603da3f0d6825aa6a0bc9b7f1 |
| 2354 | // and it required to add an override for permisive-parse.css. |
| 2355 | // When working on parse interpolation, please make sure to remove the permissive-parse |
| 2356 | // override |
| 2357 | while ( true ) { |
| 2358 | $s = $this->parseLessSelector(); |
| 2359 | if ( !$s ) { |
| 2360 | break; |
| 2361 | } |
| 2362 | $selectors[] = $s; |
| 2363 | $this->commentStore = []; |
| 2364 | |
| 2365 | if ( $s->condition && count( $selectors ) > 1 ) { |
| 2366 | $this->Error( 'Guards are only currently allowed on a single selector.' ); |
| 2367 | } |
| 2368 | |
| 2369 | if ( !$this->matchChar( ',' ) ) { |
| 2370 | break; |
| 2371 | } |
| 2372 | if ( $s->condition ) { |
| 2373 | $this->Error( 'Guards are only currently allowed on a single selector.' ); |
| 2374 | } |
| 2375 | $this->commentStore = []; |
| 2376 | } |
| 2377 | |
| 2378 | if ( $selectors ) { |
| 2379 | $rules = $this->parseBlock(); |
| 2380 | if ( is_array( $rules ) ) { |
| 2381 | $this->forget(); |
| 2382 | // TODO: Less_Environment::$strictImports is not yet ported |
| 2383 | // It is passed here by less.js |
| 2384 | return new Less_Tree_Ruleset( $selectors, $rules ); |
| 2385 | } |
| 2386 | } |
| 2387 | |
| 2388 | // Backtrack |
| 2389 | $this->restore(); |
| 2390 | } |
| 2391 | |
| 2392 | /** |
| 2393 | * Custom less.php parse function for finding simple name-value css pairs |
| 2394 | * ex: width:100px; |
| 2395 | */ |
| 2396 | private function parseNameValue() { |
| 2397 | $index = $this->pos; |
| 2398 | $this->save(); |
| 2399 | |
| 2400 | $match = $this->matchReg( '/\\G([a-zA-Z\-]+)\s*:\s*([\'"]?[#a-zA-Z0-9\-%\.,]+?[\'"]?\s*) *(! *important)?\s*([;}])/' ); |
| 2401 | if ( $match ) { |
| 2402 | |
| 2403 | if ( $match[4] == '}' ) { |
| 2404 | // because we will parse all comments after closing }, we need to reset the store as |
| 2405 | // we're going to reset the position to closing } |
| 2406 | $this->commentStore = []; |
| 2407 | $this->pos = $index + strlen( $match[0] ) - 1; |
| 2408 | $match[2] = rtrim( $match[2] ); |
| 2409 | } |
| 2410 | |
| 2411 | if ( $match[3] ) { |
| 2412 | $match[2] .= $match[3]; |
| 2413 | } |
| 2414 | $this->forget(); |
| 2415 | return new Less_Tree_NameValue( $match[1], $match[2], $index, $this->env->currentFileInfo ); |
| 2416 | } |
| 2417 | |
| 2418 | $this->restore(); |
| 2419 | } |
| 2420 | |
| 2421 | // @see less-3.13.1.js#parsers.declaration |
| 2422 | private function parseDeclaration() { |
| 2423 | $value = null; |
| 2424 | $index = $this->pos; |
| 2425 | $hasDR = false; |
| 2426 | $c = $this->input[$this->pos] ?? null; |
| 2427 | $important = null; |
| 2428 | $merge = false; |
| 2429 | // TODO: Figure out why less.js also handles ':' here, and implement with regression test. |
| 2430 | if ( $c === '.' || $c === '#' || $c === '&' ) { |
| 2431 | return; |
| 2432 | } |
| 2433 | |
| 2434 | $this->save(); |
| 2435 | $name = $this->parseVariable() ?? $this->parseRuleProperty(); |
| 2436 | |
| 2437 | if ( $name ) { |
| 2438 | $isVariable = is_string( $name ); |
| 2439 | |
| 2440 | if ( $isVariable ) { |
| 2441 | $value = $this->parseDetachedRuleset(); |
| 2442 | if ( $value ) { |
| 2443 | $hasDR = true; |
| 2444 | } |
| 2445 | } |
| 2446 | $this->commentStore = []; |
| 2447 | if ( !$value ) { |
| 2448 | // a name returned by this.ruleProperty() is always an array of the form: |
| 2449 | // [string-1, ..., string-n, ""] or [string-1, ..., string-n, "+"] |
| 2450 | // where each item is a tree.Keyword or tree.Variable |
| 2451 | if ( !$isVariable && is_array( $name ) && count( $name ) > 1 ) { |
| 2452 | $merge = array_pop( $name )->value; |
| 2453 | } |
| 2454 | // Custom property values get permissive parsing |
| 2455 | if ( is_array( $name ) && array_key_exists( 0, $name ) // to satisfy phan |
| 2456 | && $name[0] instanceof Less_Tree_Keyword |
| 2457 | && $name[0]->value && strpos( $name[0]->value, '--' ) === 0 ) { |
| 2458 | $value = $this->parsePermissiveValue(); |
| 2459 | } else { |
| 2460 | // Try to store values as anonymous |
| 2461 | // If we need the value later we'll re-parse it in ruleset.parseValue |
| 2462 | $value = $this->parseAnonymousValue(); |
| 2463 | } |
| 2464 | |
| 2465 | if ( $value ) { |
| 2466 | $this->forget(); |
| 2467 | // anonymous values absorb the end ';' which is required for them to work |
| 2468 | return new Less_Tree_Declaration( $name, $value, false, $merge, $index, |
| 2469 | $this->env->currentFileInfo ); |
| 2470 | } |
| 2471 | if ( !$value ) { |
| 2472 | $value = $this->parseValue(); |
| 2473 | } |
| 2474 | if ( $value ) { |
| 2475 | $important = $this->parseImportant(); |
| 2476 | } elseif ( $isVariable ) { |
| 2477 | $value = $this->parsePermissiveValue(); |
| 2478 | } |
| 2479 | } |
| 2480 | if ( $value && ( $this->parseEnd() || $hasDR ) ) { |
| 2481 | $this->forget(); |
| 2482 | return new Less_Tree_Declaration( $name, $value, $important, $merge, $index, $this->env->currentFileInfo ); |
| 2483 | } else { |
| 2484 | $this->restore(); |
| 2485 | } |
| 2486 | } else { |
| 2487 | $this->restore(); |
| 2488 | } |
| 2489 | } |
| 2490 | |
| 2491 | /** |
| 2492 | * @see less-3.13.1.js#parsers.anonymousValue |
| 2493 | */ |
| 2494 | private function parseAnonymousValue() { |
| 2495 | $index = $this->pos; |
| 2496 | $match = $this->matchReg( '/\\G([^.#@\$+\/\'"*`(;{}-]*);/' ); |
| 2497 | if ( $match ) { |
| 2498 | return new Less_Tree_Anonymous( $match[1], $index ); |
| 2499 | } |
| 2500 | } |
| 2501 | |
| 2502 | /** |
| 2503 | * Used for custom properties, at-rules, and variables (as fallback) |
| 2504 | * Parses almost anything inside of {} [] () "" blocks |
| 2505 | * until it reaches outer-most tokens. |
| 2506 | * |
| 2507 | * First, it will try to parse comments and entities to reach |
| 2508 | * the end. This is mostly like the Expression parser except no |
| 2509 | * math is allowed. |
| 2510 | * |
| 2511 | * @see less-3.13.1.js#parsers.permissiveValue |
| 2512 | * @param null|string|array $untilTokens |
| 2513 | */ |
| 2514 | private function parsePermissiveValue( $untilTokens = null ) { |
| 2515 | $tok = $untilTokens ?? ';'; |
| 2516 | $index = $this->pos; |
| 2517 | $result = []; |
| 2518 | |
| 2519 | if ( is_array( $tok ) ) { |
| 2520 | $testCurrentChar = static function ( $currentChar ) use ( $tok ) { |
| 2521 | return in_array( $currentChar, $tok ); |
| 2522 | }; |
| 2523 | } else { |
| 2524 | $testCurrentChar = static function ( $currentChar ) use ( $tok ) { |
| 2525 | return $tok === $currentChar; |
| 2526 | }; |
| 2527 | } |
| 2528 | |
| 2529 | if ( $testCurrentChar( $this->input[$this->pos] ) ) { |
| 2530 | return; |
| 2531 | } |
| 2532 | |
| 2533 | $value = []; |
| 2534 | do { |
| 2535 | $e = $this->parseComment(); |
| 2536 | if ( $e ) { |
| 2537 | $value[] = $e; |
| 2538 | continue; |
| 2539 | } |
| 2540 | $e = $this->parseEntity(); |
| 2541 | if ( $e ) { |
| 2542 | $value[] = $e; |
| 2543 | } |
| 2544 | } while ( $e ); |
| 2545 | $done = $testCurrentChar( $this->input[$this->pos] ); |
| 2546 | if ( $value ) { |
| 2547 | $value = new Less_Tree_Expression( $value ); |
| 2548 | if ( $done ) { |
| 2549 | return $value; |
| 2550 | } else { |
| 2551 | $result[] = $value; |
| 2552 | } |
| 2553 | // Preserve space before $parseUntil as it will not |
| 2554 | if ( $this->input[$this->pos - 1] === ' ' ) { |
| 2555 | $result[] = new Less_Tree_Anonymous( ' ', $index ); |
| 2556 | } |
| 2557 | } |
| 2558 | $this->save(); |
| 2559 | $value = $this->parseUntil( $tok ); |
| 2560 | |
| 2561 | if ( $value ) { |
| 2562 | if ( is_string( $value ) ) { |
| 2563 | $this->Error( "expected '" . $value . "'" ); |
| 2564 | } |
| 2565 | if ( count( $value ) === 1 && $value[0] === ' ' ) { |
| 2566 | $this->forget(); |
| 2567 | return new Less_Tree_Anonymous( '', $index ); |
| 2568 | } |
| 2569 | $valueLength = count( $value ); |
| 2570 | for ( $i = 0; $i < $valueLength; $i++ ) { |
| 2571 | $item = $value[$i]; |
| 2572 | if ( is_array( $item ) ) { |
| 2573 | $result[] = new Less_Tree_Quoted( $item[0], $item[1], true, $index, |
| 2574 | $this->env->currentFileInfo ); |
| 2575 | } else { |
| 2576 | if ( $i === $valueLength - 1 ) { |
| 2577 | $item = trim( $item ); |
| 2578 | } |
| 2579 | // Treat like quoted values, but replace vars like unquoted expressions |
| 2580 | $quote = |
| 2581 | new Less_Tree_Quoted( '\'', $item, true, $index, |
| 2582 | $this->env->currentFileInfo ); |
| 2583 | $quote->variableRegex = '/@([\w-]+)/'; |
| 2584 | $quote->propRegex = '/\$([\w-]+)/'; |
| 2585 | $result[] = $quote; |
| 2586 | } |
| 2587 | } |
| 2588 | $this->forget(); |
| 2589 | return new Less_Tree_Expression( $result, true ); |
| 2590 | } |
| 2591 | $this->restore(); |
| 2592 | } |
| 2593 | |
| 2594 | // |
| 2595 | // An @import atrule |
| 2596 | // |
| 2597 | // @import "lib"; |
| 2598 | // |
| 2599 | // Depending on our environment, importing is done differently: |
| 2600 | // In the browser, it's an XHR request, in Node, it would be a |
| 2601 | // file-system operation. The function used for importing is |
| 2602 | // stored in `import`, which we pass to the Import constructor. |
| 2603 | // |
| 2604 | private function parseImport() { |
| 2605 | $this->save(); |
| 2606 | |
| 2607 | $dir = $this->matchReg( '/\\G@import?\s+/' ); |
| 2608 | |
| 2609 | if ( $dir ) { |
| 2610 | $options = $this->parseImportOptions(); |
| 2611 | $path = $this->parseEntitiesQuoted() ?? $this->parseEntitiesUrl(); |
| 2612 | |
| 2613 | if ( $path ) { |
| 2614 | $features = $this->parseMediaFeatures(); |
| 2615 | if ( $this->matchChar( ';' ) ) { |
| 2616 | if ( $features ) { |
| 2617 | $features = new Less_Tree_Value( $features ); |
| 2618 | } |
| 2619 | |
| 2620 | $this->forget(); |
| 2621 | return new Less_Tree_Import( $path, $features, $options, $this->pos, $this->env->currentFileInfo ); |
| 2622 | } |
| 2623 | } |
| 2624 | } |
| 2625 | |
| 2626 | $this->restore(); |
| 2627 | } |
| 2628 | |
| 2629 | private function parseImportOptions() { |
| 2630 | $options = []; |
| 2631 | |
| 2632 | // list of options, surrounded by parens |
| 2633 | if ( !$this->matchChar( '(' ) ) { |
| 2634 | return $options; |
| 2635 | } |
| 2636 | do { |
| 2637 | $optionName = $this->parseImportOption(); |
| 2638 | if ( $optionName ) { |
| 2639 | $value = true; |
| 2640 | switch ( $optionName ) { |
| 2641 | case "css": |
| 2642 | $optionName = "less"; |
| 2643 | $value = false; |
| 2644 | break; |
| 2645 | case "once": |
| 2646 | $optionName = "multiple"; |
| 2647 | $value = false; |
| 2648 | break; |
| 2649 | } |
| 2650 | $options[$optionName] = $value; |
| 2651 | if ( !$this->matchChar( ',' ) ) { |
| 2652 | break; |
| 2653 | } |
| 2654 | } |
| 2655 | } while ( $optionName ); |
| 2656 | $this->expectChar( ')' ); |
| 2657 | return $options; |
| 2658 | } |
| 2659 | |
| 2660 | private function parseImportOption() { |
| 2661 | $opt = $this->matchReg( '/\\G(less|css|multiple|once|inline|reference|optional)/' ); |
| 2662 | if ( $opt ) { |
| 2663 | return $opt[1]; |
| 2664 | } |
| 2665 | } |
| 2666 | |
| 2667 | private function parseMediaFeature() { |
| 2668 | $nodes = []; |
| 2669 | |
| 2670 | do { |
| 2671 | $e = $this->parseEntitiesKeyword() ?? $this->parseEntitiesVariable(); |
| 2672 | if ( $e ) { |
| 2673 | $nodes[] = $e; |
| 2674 | } elseif ( $this->matchChar( '(' ) ) { |
| 2675 | $p = $this->parseProperty(); |
| 2676 | $e = $this->parseValue(); |
| 2677 | if ( $this->matchChar( ')' ) ) { |
| 2678 | if ( $p && $e ) { |
| 2679 | $r = new Less_Tree_Declaration( $p, $e, null, null, $this->pos, $this->env->currentFileInfo, true ); |
| 2680 | $nodes[] = new Less_Tree_Paren( $r ); |
| 2681 | } elseif ( $e ) { |
| 2682 | $nodes[] = new Less_Tree_Paren( $e ); |
| 2683 | } else { |
| 2684 | return null; |
| 2685 | } |
| 2686 | } else { |
| 2687 | return null; |
| 2688 | } |
| 2689 | } |
| 2690 | } while ( $e ); |
| 2691 | |
| 2692 | if ( $nodes ) { |
| 2693 | return new Less_Tree_Expression( $nodes ); |
| 2694 | } |
| 2695 | } |
| 2696 | |
| 2697 | private function parseMediaFeatures() { |
| 2698 | $features = []; |
| 2699 | |
| 2700 | do { |
| 2701 | $e = $this->parseMediaFeature(); |
| 2702 | if ( $e ) { |
| 2703 | $features[] = $e; |
| 2704 | if ( !$this->matchChar( ',' ) ) { |
| 2705 | break; |
| 2706 | } |
| 2707 | } else { |
| 2708 | $e = $this->parseEntitiesVariable(); |
| 2709 | if ( $e ) { |
| 2710 | $features[] = $e; |
| 2711 | if ( !$this->matchChar( ',' ) ) { |
| 2712 | break; |
| 2713 | } |
| 2714 | } |
| 2715 | } |
| 2716 | } while ( $e ); |
| 2717 | |
| 2718 | return $features ?: null; |
| 2719 | } |
| 2720 | |
| 2721 | /** |
| 2722 | * @see less-2.5.3.js#parsers.media |
| 2723 | */ |
| 2724 | private function parseMedia() { |
| 2725 | if ( $this->matchStr( '@media' ) ) { |
| 2726 | $this->save(); |
| 2727 | |
| 2728 | $features = $this->parseMediaFeatures(); |
| 2729 | $rules = $this->parseBlock(); |
| 2730 | |
| 2731 | if ( $rules === null ) { |
| 2732 | $this->restore(); |
| 2733 | return; |
| 2734 | } |
| 2735 | |
| 2736 | $this->forget(); |
| 2737 | return new Less_Tree_Media( $rules, $features, $this->pos, $this->env->currentFileInfo ); |
| 2738 | } |
| 2739 | } |
| 2740 | |
| 2741 | /** |
| 2742 | * A CSS AtRule like `@charset "utf-8";` |
| 2743 | * |
| 2744 | * @return Less_Tree_Import|Less_Tree_Media|Less_Tree_AtRule|null |
| 2745 | * @see less-3.13.1.js#parsers.atrule |
| 2746 | * @todo check feature parity with 3.13.1 |
| 2747 | */ |
| 2748 | private function parseAtRule() { |
| 2749 | if ( !$this->peekChar( '@' ) ) { |
| 2750 | return; |
| 2751 | } |
| 2752 | |
| 2753 | $rules = null; |
| 2754 | $index = $this->pos; |
| 2755 | $hasBlock = true; |
| 2756 | $hasIdentifier = false; |
| 2757 | $hasExpression = false; |
| 2758 | $hasUnknown = false; |
| 2759 | $isRooted = true; |
| 2760 | |
| 2761 | $value = $this->parseImport() ?? $this->parseMedia(); |
| 2762 | if ( $value ) { |
| 2763 | return $value; |
| 2764 | } |
| 2765 | |
| 2766 | $this->save(); |
| 2767 | |
| 2768 | $name = $this->matchReg( '/\\G@[a-z-]+/' ); |
| 2769 | |
| 2770 | if ( !$name ) { |
| 2771 | return; |
| 2772 | } |
| 2773 | |
| 2774 | $nonVendorSpecificName = $name; |
| 2775 | $pos = strpos( $name, '-', 2 ); |
| 2776 | if ( $name[1] == '-' && $pos > 0 ) { |
| 2777 | $nonVendorSpecificName = "@" . substr( $name, $pos + 1 ); |
| 2778 | } |
| 2779 | |
| 2780 | switch ( $nonVendorSpecificName ) { |
| 2781 | /* |
| 2782 | case "@font-face": |
| 2783 | case "@viewport": |
| 2784 | case "@top-left": |
| 2785 | case "@top-left-corner": |
| 2786 | case "@top-center": |
| 2787 | case "@top-right": |
| 2788 | case "@top-right-corner": |
| 2789 | case "@bottom-left": |
| 2790 | case "@bottom-left-corner": |
| 2791 | case "@bottom-center": |
| 2792 | case "@bottom-right": |
| 2793 | case "@bottom-right-corner": |
| 2794 | case "@left-top": |
| 2795 | case "@left-middle": |
| 2796 | case "@left-bottom": |
| 2797 | case "@right-top": |
| 2798 | case "@right-middle": |
| 2799 | case "@right-bottom": |
| 2800 | hasBlock = true; |
| 2801 | isRooted = true; |
| 2802 | break; |
| 2803 | */ |
| 2804 | case "@counter-style": |
| 2805 | $hasIdentifier = true; |
| 2806 | break; |
| 2807 | case "@charset": |
| 2808 | $hasIdentifier = true; |
| 2809 | $hasBlock = false; |
| 2810 | break; |
| 2811 | case "@namespace": |
| 2812 | $hasExpression = true; |
| 2813 | $hasBlock = false; |
| 2814 | break; |
| 2815 | case "@keyframes": |
| 2816 | $hasIdentifier = true; |
| 2817 | break; |
| 2818 | case "@host": |
| 2819 | case "@page": |
| 2820 | $hasUnknown = true; |
| 2821 | break; |
| 2822 | case "@document": |
| 2823 | case "@supports": |
| 2824 | $hasUnknown = true; |
| 2825 | $isRooted = false; |
| 2826 | break; |
| 2827 | default: |
| 2828 | // TODO: port other parts of https://github.com/less/less.js/commit/e3c13121dfdca48ba8fe26335cc12dd3f7948676 |
| 2829 | $hasUnknown = true; |
| 2830 | break; |
| 2831 | } |
| 2832 | |
| 2833 | $this->commentStore = []; |
| 2834 | |
| 2835 | if ( $hasIdentifier ) { |
| 2836 | $value = $this->parseEntity(); |
| 2837 | if ( !$value ) { |
| 2838 | $this->Error( "expected " . $name . " identifier" ); |
| 2839 | } |
| 2840 | } elseif ( $hasExpression ) { |
| 2841 | $value = $this->parseExpression(); |
| 2842 | if ( !$value ) { |
| 2843 | $this->Error( "expected " . $name . " expression" ); |
| 2844 | } |
| 2845 | } elseif ( $hasUnknown ) { |
| 2846 | $value = $this->parsePermissiveValue( [ '{', ';' ] ); |
| 2847 | $hasBlock = $this->input[$this->pos] === '{'; |
| 2848 | if ( !$value ) { |
| 2849 | if ( !$hasBlock && $this->input[$this->pos] !== ';' ) { |
| 2850 | $this->Error( $name . " rule is missing block or ending semi-colon" ); |
| 2851 | } |
| 2852 | } elseif ( !$value->value ) { |
| 2853 | $value = null; |
| 2854 | } |
| 2855 | } |
| 2856 | |
| 2857 | if ( $hasBlock ) { |
| 2858 | $rules = $this->parseBlockRuleset(); |
| 2859 | } |
| 2860 | |
| 2861 | if ( $rules || ( !$hasBlock && $value && $this->matchChar( ';' ) ) ) { |
| 2862 | $this->forget(); |
| 2863 | return new Less_Tree_AtRule( $name, $value, $rules, $index, $isRooted, $this->env->currentFileInfo ); |
| 2864 | } |
| 2865 | |
| 2866 | $this->restore(); |
| 2867 | } |
| 2868 | |
| 2869 | // |
| 2870 | // A Value is a comma-delimited list of Expressions |
| 2871 | // |
| 2872 | // font-family: Baskerville, Georgia, serif; |
| 2873 | // |
| 2874 | // In a Rule, a Value represents everything after the `:`, |
| 2875 | // and before the `;`. |
| 2876 | // |
| 2877 | private function parseValue() { |
| 2878 | $expressions = []; |
| 2879 | $index = $this->pos; |
| 2880 | |
| 2881 | do { |
| 2882 | $e = $this->parseExpression(); |
| 2883 | if ( $e ) { |
| 2884 | $expressions[] = $e; |
| 2885 | if ( !$this->matchChar( ',' ) ) { |
| 2886 | break; |
| 2887 | } |
| 2888 | } |
| 2889 | } while ( $e ); |
| 2890 | |
| 2891 | if ( $expressions ) { |
| 2892 | return new Less_Tree_Value( $expressions, $index ); |
| 2893 | } |
| 2894 | } |
| 2895 | |
| 2896 | private function parseImportant() { |
| 2897 | if ( $this->peekChar( '!' ) && $this->matchReg( '/\\G! *important/' ) ) { |
| 2898 | return ' !important'; |
| 2899 | } |
| 2900 | } |
| 2901 | |
| 2902 | private function parseSub() { |
| 2903 | $this->save(); |
| 2904 | if ( $this->matchChar( '(' ) ) { |
| 2905 | $a = $this->parseAddition(); |
| 2906 | if ( $a && $this->matchChar( ')' ) ) { |
| 2907 | $this->forget(); |
| 2908 | $e = new Less_Tree_Expression( [ $a ] ); |
| 2909 | $e->parens = true; |
| 2910 | return $e; |
| 2911 | } |
| 2912 | } |
| 2913 | $this->restore(); |
| 2914 | } |
| 2915 | |
| 2916 | /** |
| 2917 | * Parses multiplication operation |
| 2918 | * |
| 2919 | * @return Less_Tree_Operation|null |
| 2920 | * @see less-3.13.1.js#parsers.multiplication |
| 2921 | */ |
| 2922 | private function parseMultiplication() { |
| 2923 | $return = $m = $this->parseOperand(); |
| 2924 | if ( $return ) { |
| 2925 | while ( true ) { |
| 2926 | $isSpaced = $this->isWhitespace( -1 ); |
| 2927 | |
| 2928 | if ( $this->peekReg( '/\\G\/[*\/]/' ) ) { |
| 2929 | break; |
| 2930 | } |
| 2931 | $this->save(); |
| 2932 | |
| 2933 | $op = $this->matchChar( '/' ) ?? $this->matchChar( '*' ) ?? $this->matchStr( './' ); |
| 2934 | if ( !$op ) { |
| 2935 | $this->forget(); |
| 2936 | break; |
| 2937 | } |
| 2938 | |
| 2939 | $a = $this->parseOperand(); |
| 2940 | |
| 2941 | if ( !$a ) { |
| 2942 | $this->restore(); |
| 2943 | break; |
| 2944 | } |
| 2945 | $this->forget(); |
| 2946 | |
| 2947 | $m->parensInOp = true; |
| 2948 | $a->parensInOp = true; |
| 2949 | $return = new Less_Tree_Operation( $op, [ $return, $a ], $isSpaced ); |
| 2950 | } |
| 2951 | } |
| 2952 | return $return; |
| 2953 | } |
| 2954 | |
| 2955 | /** |
| 2956 | * Parses an addition operation |
| 2957 | * |
| 2958 | * @return Less_Tree_Operation|null |
| 2959 | */ |
| 2960 | private function parseAddition() { |
| 2961 | $return = $m = $this->parseMultiplication(); |
| 2962 | if ( $return ) { |
| 2963 | while ( true ) { |
| 2964 | |
| 2965 | $isSpaced = $this->isWhitespace( -1 ); |
| 2966 | |
| 2967 | $op = $this->matchReg( '/\\G[-+]\s+/' ); |
| 2968 | if ( !$op ) { |
| 2969 | if ( !$isSpaced ) { |
| 2970 | $op = $this->matchChar( '+' ) ?? $this->matchChar( '-' ); |
| 2971 | } |
| 2972 | if ( !$op ) { |
| 2973 | break; |
| 2974 | } |
| 2975 | } |
| 2976 | |
| 2977 | $a = $this->parseMultiplication(); |
| 2978 | if ( !$a ) { |
| 2979 | break; |
| 2980 | } |
| 2981 | |
| 2982 | $m->parensInOp = true; |
| 2983 | $a->parensInOp = true; |
| 2984 | $return = new Less_Tree_Operation( $op, [ $return, $a ], $isSpaced ); |
| 2985 | } |
| 2986 | } |
| 2987 | |
| 2988 | return $return; |
| 2989 | } |
| 2990 | |
| 2991 | /** |
| 2992 | * Parses the conditions |
| 2993 | * |
| 2994 | * @return Less_Tree_Condition|null |
| 2995 | */ |
| 2996 | private function parseConditions() { |
| 2997 | $index = $this->pos; |
| 2998 | $return = $a = $this->parseCondition(); |
| 2999 | if ( $a ) { |
| 3000 | while ( true ) { |
| 3001 | if ( !$this->peekReg( '/\\G,\s*(not\s*)?\(/' ) || !$this->matchChar( ',' ) ) { |
| 3002 | break; |
| 3003 | } |
| 3004 | $b = $this->parseCondition(); |
| 3005 | if ( !$b ) { |
| 3006 | break; |
| 3007 | } |
| 3008 | |
| 3009 | $return = new Less_Tree_Condition( 'or', $return, $b, $index ); |
| 3010 | } |
| 3011 | return $return; |
| 3012 | } |
| 3013 | } |
| 3014 | |
| 3015 | /** |
| 3016 | * @see less-2.5.3.js#parsers.condition |
| 3017 | */ |
| 3018 | private function parseCondition() { |
| 3019 | $index = $this->pos; |
| 3020 | $negate = false; |
| 3021 | $c = null; |
| 3022 | |
| 3023 | if ( $this->matchStr( 'not' ) ) { |
| 3024 | $negate = true; |
| 3025 | } |
| 3026 | $this->expectChar( '(' ); |
| 3027 | /** @see less-3.13.1.js parsers.atomicCondition */ |
| 3028 | $a = $this->parseAddition() |
| 3029 | ?? $this->parseEntitiesKeyword() |
| 3030 | ?? $this->parseEntitiesQuoted() |
| 3031 | ?? $this->parseEntitiesMixinLookup(); |
| 3032 | |
| 3033 | if ( $a ) { |
| 3034 | $op = $this->matchReg( '/\\G(?:>=|<=|=<|[<=>])/' ); |
| 3035 | if ( $op ) { |
| 3036 | /** @see less-3.13.1.js parsers.atomicCondition */ |
| 3037 | $b = $this->parseAddition() |
| 3038 | ?? $this->parseEntitiesKeyword() |
| 3039 | ?? $this->parseEntitiesQuoted() |
| 3040 | ?? $this->parseEntitiesMixinLookup(); |
| 3041 | if ( $b ) { |
| 3042 | $c = new Less_Tree_Condition( $op, $a, $b, $index, $negate ); |
| 3043 | } else { |
| 3044 | $this->Error( 'Unexpected expression' ); |
| 3045 | } |
| 3046 | } else { |
| 3047 | $k = new Less_Tree_Keyword( 'true' ); |
| 3048 | $c = new Less_Tree_Condition( '=', $a, $k, $index, $negate ); |
| 3049 | } |
| 3050 | $this->expectChar( ')' ); |
| 3051 | // @phan-suppress-next-line PhanPossiblyInfiniteRecursionSameParams |
| 3052 | return $this->matchStr( 'and' ) ? new Less_Tree_Condition( 'and', $c, $this->parseCondition() ) : $c; |
| 3053 | } |
| 3054 | } |
| 3055 | |
| 3056 | /** |
| 3057 | * An operand is anything that can be part of an operation, |
| 3058 | * such as a Color, or a Variable |
| 3059 | * |
| 3060 | * @see less-3.13.1.js#parsers.operand |
| 3061 | */ |
| 3062 | private function parseOperand() { |
| 3063 | $negate = false; |
| 3064 | $offset = $this->pos + 1; |
| 3065 | if ( $offset >= $this->input_len ) { |
| 3066 | return; |
| 3067 | } |
| 3068 | $char = $this->input[$offset]; |
| 3069 | |
| 3070 | if ( $char === '@' || $char === '(' || $char === '$' ) { |
| 3071 | $negate = $this->matchChar( '-' ); |
| 3072 | } |
| 3073 | |
| 3074 | $o = $this->parseSub() |
| 3075 | ?? $this->parseEntitiesDimension() |
| 3076 | ?? $this->parseEntitiesColor() |
| 3077 | ?? $this->parseEntitiesVariable() |
| 3078 | ?? $this->parseEntitiesProperty() |
| 3079 | ?? $this->parseEntitiesCall() |
| 3080 | ?? $this->parseEntitiesQuoted( true ) |
| 3081 | // TODO: from less-3.13.1.js missing entities.colorKeyword() |
| 3082 | ?? $this->parseEntitiesMixinLookup(); |
| 3083 | |
| 3084 | if ( $negate ) { |
| 3085 | $o->parensInOp = true; |
| 3086 | $o = new Less_Tree_Negative( $o ); |
| 3087 | } |
| 3088 | |
| 3089 | return $o; |
| 3090 | } |
| 3091 | |
| 3092 | /** |
| 3093 | * Expressions either represent mathematical operations, |
| 3094 | * or white-space delimited Entities. |
| 3095 | * |
| 3096 | * @return Less_Tree_Expression|null |
| 3097 | * @see less-3.13.1.js#parsers.expression |
| 3098 | */ |
| 3099 | private function parseExpression() { |
| 3100 | $entities = []; |
| 3101 | $index = $this->pos; |
| 3102 | |
| 3103 | do { |
| 3104 | $e = $this->parseComment(); |
| 3105 | if ( $e ) { |
| 3106 | $entities[] = $e; |
| 3107 | continue; |
| 3108 | } |
| 3109 | $e = $this->parseAddition() ?? $this->parseEntity(); |
| 3110 | if ( $e instanceof Less_Tree_Comment ) { |
| 3111 | $e = null; |
| 3112 | } |
| 3113 | if ( $e ) { |
| 3114 | $entities[] = $e; |
| 3115 | // operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here |
| 3116 | if ( !$this->peekReg( '/\\G\/[\/*]/' ) ) { |
| 3117 | $delim = $this->matchChar( '/' ); |
| 3118 | if ( $delim ) { |
| 3119 | $entities[] = new Less_Tree_Anonymous( $delim, $index ); |
| 3120 | } |
| 3121 | } |
| 3122 | } |
| 3123 | } while ( $e ); |
| 3124 | |
| 3125 | if ( $entities ) { |
| 3126 | return new Less_Tree_Expression( $entities ); |
| 3127 | } |
| 3128 | } |
| 3129 | |
| 3130 | /** |
| 3131 | * Parse a property |
| 3132 | * eg: 'min-width', 'orientation', etc |
| 3133 | * |
| 3134 | * @return string |
| 3135 | */ |
| 3136 | private function parseProperty() { |
| 3137 | $name = $this->matchReg( '/\\G(\*?-?[_a-zA-Z0-9-]+)\s*:/' ); |
| 3138 | if ( $name ) { |
| 3139 | return $name[1]; |
| 3140 | } |
| 3141 | } |
| 3142 | |
| 3143 | /** |
| 3144 | * Parse a rule property |
| 3145 | * eg: 'color', 'width', 'height', etc |
| 3146 | * |
| 3147 | * @return array<Less_Tree_Keyword|Less_Tree_Variable> |
| 3148 | * @see less-3.13.1.js#parsers.ruleProperty |
| 3149 | */ |
| 3150 | private function parseRuleProperty() { |
| 3151 | $name = []; |
| 3152 | $index = []; |
| 3153 | |
| 3154 | $this->save(); |
| 3155 | |
| 3156 | $simpleProperty = $this->matchReg( '/\\G([_a-zA-Z0-9-]+)\s*:/' ); |
| 3157 | if ( $simpleProperty ) { |
| 3158 | $name[] = new Less_Tree_Keyword( $simpleProperty[1] ); |
| 3159 | $this->forget(); |
| 3160 | return $name; |
| 3161 | } |
| 3162 | |
| 3163 | $this->rulePropertyMatch( '/\\G(\*?)/', $index, $name ); |
| 3164 | |
| 3165 | // Consume! |
| 3166 | // @phan-suppress-next-line PhanPluginEmptyStatementWhileLoop |
| 3167 | while ( $this->rulePropertyMatch( '/\\G((?:[\w-]+)|(?:[@\$]\{[\w-]+\}))/', $index, $name |
| 3168 | ) ); |
| 3169 | |
| 3170 | if ( ( count( $name ) > 1 ) && $this->rulePropertyMatch( '/\\G((?:\+_|\+)?)\s*:/', $index, $name ) ) { |
| 3171 | $this->forget(); |
| 3172 | |
| 3173 | // at last, we have the complete match now. move forward, |
| 3174 | // convert name particles to tree objects and return: |
| 3175 | if ( $name[0] === '' ) { |
| 3176 | array_shift( $name ); |
| 3177 | array_shift( $index ); |
| 3178 | } |
| 3179 | foreach ( $name as $k => $s ) { |
| 3180 | $firstChar = $s[0] ?? ''; |
| 3181 | $name[$k] = ( $firstChar !== '@' && $firstChar !== '$' ) ? |
| 3182 | new Less_Tree_Keyword( $s ) : |
| 3183 | ( $s[0] === '@' |
| 3184 | ? new Less_Tree_Variable( '@' . substr( $s, 2, -1 ), $index[$k], $this->env->currentFileInfo ) |
| 3185 | : new Less_Tree_Property( '$' . substr( $s, 2, -1 ), $index[$k], $this->env->currentFileInfo ) |
| 3186 | ); |
| 3187 | } |
| 3188 | return $name; |
| 3189 | } else { |
| 3190 | $this->restore(); |
| 3191 | } |
| 3192 | } |
| 3193 | |
| 3194 | private function rulePropertyMatch( $re, &$index, &$name ) { |
| 3195 | $i = $this->pos; |
| 3196 | $chunk = $this->matchReg( $re ); |
| 3197 | if ( $chunk ) { |
| 3198 | $index[] = $i; |
| 3199 | $name[] = $chunk[1]; |
| 3200 | return true; |
| 3201 | } |
| 3202 | } |
| 3203 | |
| 3204 | public static function serializeVars( $vars ) { |
| 3205 | $s = ''; |
| 3206 | |
| 3207 | foreach ( $vars as $name => $value ) { |
| 3208 | if ( strval( $value ) === "" ) { |
| 3209 | $value = '~""'; |
| 3210 | } |
| 3211 | $s .= ( ( $name[0] === '@' ) ? '' : '@' ) . $name . ': ' . $value . ( ( substr( $value, -1 ) === ';' ) ? '' : ';' ); |
| 3212 | } |
| 3213 | |
| 3214 | return $s; |
| 3215 | } |
| 3216 | |
| 3217 | /** |
| 3218 | * Some versions of PHP have trouble with method_exists($a,$b) if $a is not an object |
| 3219 | * |
| 3220 | * @internal For internal use only |
| 3221 | * @param mixed $a |
| 3222 | * @param string $b |
| 3223 | */ |
| 3224 | public static function is_method( $a, $b ) { |
| 3225 | return is_object( $a ) && method_exists( $a, $b ); |
| 3226 | } |
| 3227 | |
| 3228 | /** |
| 3229 | * Round numbers similarly to javascript |
| 3230 | * eg: 1.499999 to 1 instead of 2 |
| 3231 | * |
| 3232 | * @internal For internal use only |
| 3233 | */ |
| 3234 | public static function round( $input, $precision = 0 ) { |
| 3235 | $precision = pow( 10, $precision ); |
| 3236 | $i = $input * $precision; |
| 3237 | |
| 3238 | $ceil = ceil( $i ); |
| 3239 | $floor = floor( $i ); |
| 3240 | if ( ( $ceil - $i ) <= ( $i - $floor ) ) { |
| 3241 | return $ceil / $precision; |
| 3242 | } else { |
| 3243 | return $floor / $precision; |
| 3244 | } |
| 3245 | } |
| 3246 | |
| 3247 | /** @return never */ |
| 3248 | public function Error( $msg ) { |
| 3249 | throw new Less_Exception_Parser( $msg, null, $this->furthest, $this->env->currentFileInfo ); |
| 3250 | } |
| 3251 | |
| 3252 | public static function WinPath( $path ) { |
| 3253 | return str_replace( '\\', '/', $path ); |
| 3254 | } |
| 3255 | |
| 3256 | public static function AbsPath( $path, $winPath = false ) { |
| 3257 | if ( strpos( $path, '//' ) !== false && preg_match( '/^(https?:)?\/\//i', $path ) ) { |
| 3258 | return $winPath ? '' : false; |
| 3259 | } else { |
| 3260 | $path = realpath( $path ); |
| 3261 | if ( $winPath ) { |
| 3262 | $path = self::WinPath( $path ); |
| 3263 | } |
| 3264 | return $path; |
| 3265 | } |
| 3266 | } |
| 3267 | |
| 3268 | public function CacheEnabled() { |
| 3269 | return ( self::$options['cache_method'] && ( Less_Cache::$cache_dir || ( self::$options['cache_method'] == 'callback' ) ) ); |
| 3270 | } |
| 3271 | |
| 3272 | } |