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GeezerVison is showing github.com — mediawiki-extensions-Math/src/WikiTexVC/parser.pegjs at master · wikimedia/mediawiki-extensions-Math Expand file tree/ Copy pathparser.pegjsMore file actions 620 lines (560 loc) · 18.9 KB / Copy pathparser.pegjsFile metadata and controls620 lines (560 loc) · 18.9 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 /** PEGjs lexer/parser */ {{ use MediaWiki\Extension\Math\WikiTexVC\Mhchem\MhchemParser; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Box; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Big; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Declaration; use MediaWiki\Extension\Math\WikiTexVC\Nodes\DQ; use MediaWiki\Extension\Math\WikiTexVC\Nodes\FQ; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Fun1; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Fun1nb; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Fun2; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Fun2nb; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Fun2sq; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Fun4; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Infix; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Literal; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Lr; use MediaWiki\Extension\Math\WikiTexVC\Nodes\LengthSpec; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Matrix; use MediaWiki\Extension\Math\WikiTexVC\Nodes\Mhchem; use MediaWiki\Extension\Math\WikiTexVC\Nodes\TexNode; use MediaWiki\Extension\Math\WikiTexVC\Nodes\UQ; use MediaWiki\Extension\Math\WikiTexVC\Nodes\TexArray; }} { private TexUtil $tu; /** @var array[] e.g. mhchem-deprecation */ public array $warnings = []; private function initialize(): void { $this->tu = TexUtil::getInstance(); # get reference of the options for usage in functions. $this->options = ParserUtil::createOptions($this->options); $this->warnings = []; } /** * Converts the argument of \ce or \pu with mhchem and parses the result, so nested \ce recurse. * Unbraced arguments and input that only parses unconverted are the deprecated format. */ private function mhchem( string $name, string $arg, bool $unbraced = false ): TexNode { if ( $unbraced ) { $this->warnings[] = [ 'type' => 'mhchem-deprecation', 'details' => "$name without braces" ]; } $parser = new Parser(); try { $tree = $parser->parse( ( new MhchemParser() )->toTex( $arg, substr( $name, 1 ), true ), $this->options ); array_push( $this->warnings, ...$parser->warnings ); return new Mhchem( $name, $tree ); } catch ( SyntaxError | \RuntimeException $e ) { $this->warnings[] = [ 'type' => 'mhchem-deprecation', 'details' => $e->getMessage() ]; $tree = $parser->parse( $arg, $this->options ); array_push( $this->warnings, ...$parser->warnings ); return new Fun1( $name, $tree->setCurly() ); } } } // first rule is the start production. start = _ t:tex_expr { assert($t instanceof TexArray); return $t; } // the PEG grammar doesn't automatically ignore whitespace when tokenizing. // so we add `_` productions in appropriate places to eat whitespace. // Lexer rules (which are capitalized) are expected to always eat // *trailing* whitespace. Leading whitespace is taken care of in the `start` // rule above. _ = [ \t\n\r]* ///////////////////////////////////////////////////////////// // PARSER //---------------------------------------------------------- tex_expr = e:expr EOF { return $e; } / e1:ne_expr name:FUN_INFIX e2:ne_expr EOF { return new TexArray( new Infix($name, $e1, $e2)); } expr = ne_expr / "" { return new TexArray(); } ne_expr = h:lit_aq t:expr { return $t->unshift($h); } / h:litsq_aq t:expr { return $t->unshift($h); } / d:DECLARATION e:expr { return new TexArray(new Declaration($d->getFname(), $e)); } litsq_aq = litsq_fq / litsq_dq / litsq_uq / litsq_zq litsq_fq = l1:litsq_dq SUP l2:lit { return new FQ($l1->getBase(), $l1->getDown(), $l2); } / l1:litsq_uq SUB l2:lit { return new FQ($l1->getBase(), $l2, $l1->getUp()); } litsq_uq = base:litsq_zq SUP upi:lit { return new UQ($base, $upi); } litsq_dq = base:litsq_zq SUB downi:lit { return new DQ($base, $downi); } litsq_zq = SQ_CLOSE { return new Literal( "]"); } expr_nosqc = l:lit_aq e:expr_nosqc { return $e ->unshift( $l ); } / d:DECLARATION e:expr_nosqc { return new TexArray(new Declaration($d->getFname(), $e)); } / "" /* */ { return new TexArray(); } lit_aq = lit_fq / lit_dq / lit_uq / lit_dqn / lit_uqn / lit lit_fq = l1:lit_dq SUP l2:lit { return new FQ($l1->getBase(), $l1->getDown(), $l2); } / l1:lit_uq SUB l2:lit { return new FQ ($l1->getBase(), $l2, $l1->getUp()); } / l1:lit_dqn SUP l2:lit { return new FQ(new TexArray(), $l1->getDown(), $l2); } / l1:lit_uqn SUB l2:lit { return new FQ(new TexArray(), $l2, $l1->getUp()); } lit_uq = base:lit SUP upi:lit { return new UQ($base, $upi); } lit_dq = base:lit SUB downi:lit { return new DQ($base, $downi); } lit_uqn = SUP l:lit { return new UQ(new TexArray(),$l); } lit_dqn = SUB l:lit { return new DQ(new TexArray(),$l); } left = LEFTI d:DELIMITER { return $d; } / LEFTI SQ_CLOSE { return "]"; } right = RIGHTI d:DELIMITER { return $d; } / RIGHTI SQ_CLOSE { return "]"; } lit = r:LITERAL { return new Literal($r); } / f:generic_func &{ return $this->tu->latex_function_names($f); } _ c:( &( "(" / "[" / "\\{" ) { return ""; } / "" { return " "; } ) { return new Literal( $f . $c ); } // quasi-literal; this is from Texutil.find(...) but the result is not // guaranteed to be Tex.LITERAL(...) / f:generic_func &{ return $this->tu->nullary_macro_aliase($f); } _ // from Texutil.find(...) { $parser = new Parser(); $ast = $parser->parse($this->tu->nullary_macro_aliase($f), $this->options); assert($ast instanceof TexArray && $ast->getLength() === 1); return $ast->first(); } / f:generic_func &{ return $this->tu->deprecated_nullary_macro_aliase($f); } _ // from Texutil.find(...) { $parser = new Parser(); $ast = $parser->parse($this->tu->deprecated_nullary_macro_aliase($f), $this->options); assert($ast instanceof TexArray && $ast->getLength() === 1); if ($this->options['oldtexvc']){ return $ast->first(); } else { throw new SyntaxError("Deprecation: Alias no longer supported.", [], $this->text(), $this->offset(), $this->line(), $this->column(), $this->location()); } } / f:generic_func &{ return $this->tu->mediawiki_function_names($f); } _ { if(is_array($f)) { // This is an unexpected case, but covers the ambiguity of slice in javascript. $fProcessed = implode(array_slice($f, 1)); } else { $fProcessed = substr($f,1); } return new Fun1nb( '\\operatorname', new Literal( $fProcessed ) ); } / r:DELIMITER { return new Literal($r); } / b:BIG r:DELIMITER { return new Big($b, $r); } / b:BIG SQ_CLOSE { return new Big($b, "]"); } / l:left e:expr r:right {return new Lr($l, $r, $e); } / name:FUN_AR1opt e:expr_nosqc SQ_CLOSE l:lit /* must be before FUN_AR1 */ { return new Fun2sq($name, $e->setCurly(), $l); } / name:FUN_AR1 l:lit { return new Fun1($name, $l); } / name:FUN_AR1nb l:lit { return new Fun1nb($name, $l); } / name:FUN_MHCHEM arg:RAW_GROUP { return $this->mhchem($name, $arg); } / name:FUN_MHCHEM arg:RAW_TOKEN { return $this->mhchem($name, $arg, true); } / name:FUN_AR2 l1:lit l2:lit { return new Fun2($name, $l1, $l2); } / name:FUN_AR4 l1:lit l2:lit l3:lit l4:lit { return new Fun4($name, $l1, $l2, $l3, $l4); } / name:FUN_AR2nb l1:lit l2:lit { return new Fun2nb($name, $l1, $l2); } / BOX / CURLY_OPEN e:expr CURLY_CLOSE { return $e->setCurly(); } / CURLY_OPEN e1:ne_expr name:FUN_INFIX e2:ne_expr CURLY_CLOSE { return new Infix($name, $e1, $e2); } / BEGIN_MATRIX m:(array/matrix) END_MATRIX { return $m->setTop( 'matrix' ); } / BEGIN_PMATRIX m:(array/matrix) END_PMATRIX { return $m->setTop( 'pmatrix' ); } / BEGIN_BMATRIX m:(array/matrix) END_BMATRIX { return $m->setTop( 'bmatrix' ); } / BEGIN_BBMATRIX m:(array/matrix) END_BBMATRIX { return $m->setTop( 'Bmatrix' ); } / BEGIN_VMATRIX m:(array/matrix) END_VMATRIX { return $m->setTop( 'vmatrix' ); } / BEGIN_VVMATRIX m:(array/matrix) END_VVMATRIX { return $m->setTop( 'Vmatrix' ); } / BEGIN_ARRAY opt_pos m:array END_ARRAY { return $m->setTop( 'array' ); } / BEGIN_ALIGN opt_pos m:matrix END_ALIGN { return $m->setTop( 'aligned' ); } / BEGIN_ALIGNED opt_pos m:matrix END_ALIGNED // parse what we emit { return $m->setTop( 'aligned' ); } / BEGIN_ALIGNAT m:alignat END_ALIGNAT { return $m->setTop( 'alignedat' ); } / BEGIN_ALIGNEDAT m:alignat END_ALIGNEDAT // parse what we emit { return $m->setTop( 'alignedat' ); } / BEGIN_SMALLMATRIX m:(array/matrix) END_SMALLMATRIX { return $m->setTop( 'smallmatrix' ); } / BEGIN_CASES m:matrix END_CASES { return $m->setTop( 'cases' ); } / "\\begin{" alpha+ "}" /* better error messages for unknown environments */ { throw new SyntaxError("Illegal TeX function", [], $this->text(), $this->offset(), $this->line(), $this->column(), $this->location()); } / f:generic_func &{ return !$this->tu->getAllFunctionsAt($f); } { throw new SyntaxError("Illegal TeX function", [], $f, $this->offset(), $this->line(), $this->column(), $this->location()); } // "array" requires mandatory column specification array = cs:column_spec m:matrix { return $m->setColumnSpecs( $cs ); } // "alignat" requires mandatory # of columns alignat = as:alignat_spec m:matrix { return $m->setColumnSpecs( $as ); } // "matrix" does not require column specification matrix = l:line_start tail:( r:NEXT_ROW m:matrix { return [$m,$r]; } )? { if ($tail === null) { return new Matrix( 'matrix', new TexArray( $l ) ); } return new Matrix( 'matrix', $tail[0]->unshift($l), $tail[1] ); } line_start = f:HLINE l:line_start { if ($l->first() === null ) { $l->push(new TexArray()); } $l->first()->unshift(new Literal($f . " ")); return $l;} / line line = e:expr tail:( NEXT_CELL l:line { return $l; } )? { if ($tail === null) { return new TexArray( $e ) ; } return $tail->unshift($e); } column_spec = CURLY_OPEN cs:(one_col+ { return $this->text(); }) CURLY_CLOSE { return TexArray::newCurly(new Literal($cs)); } one_col = [lrc] _ / "p" CURLY_OPEN boxchars+ CURLY_CLOSE / "*" CURLY_OPEN [0-9]+ _ CURLY_CLOSE ( one_col / CURLY_OPEN one_col+ CURLY_CLOSE ) / "||" _ / "|" _ / "@" _ CURLY_OPEN boxchars+ CURLY_CLOSE alignat_spec = CURLY_OPEN num:([0-9]+ { return $this->text(); }) _ CURLY_CLOSE { return TexArray::newCurly(new Literal($num)); } opt_pos = "[" _ [tcb] _ "]" _ / "" /* empty */ ///////////////////////////////////////////////////////////// // LEXER //---------------------------------------------------------- //space = [ \t\n\r] alpha = [a-zA-Z] literal_id = [a-zA-Z] literal_mn = [0-9] literal_uf_lt = [,:;?!\'] delimiter_uf_lt = [().] literal_uf_op = [-+*=] delimiter_uf_op = [\/|] boxchars // match only valid UTF-16 sequences = [-0-9a-zA-Z+*,=():\/;?.!'` \[\]\[\u0080-\ud7ff\]\[\ue000-\uffff\]] BOX = b:generic_func &{ return $this->tu->box_functions($b); } _ "{" cs:boxchars+ "}" _ { return new Box($b, join('', $cs)); } LITERAL = ":=" _ { return ":="; } / c:( literal_id / literal_mn / literal_uf_lt / "-" / literal_uf_op ) _ { return $c; } / f:generic_func &{ return $this->tu->nullary_macro($f); } _ // from Texutil.find(...) { return $f . " "; } / f:generic_func &{ return $this->options['usemathrm'] && $this->tu->nullary_macro_in_mbox($f); } _ // from Texutil.find(...) { return "\\mathrm {" . $f . "} "; } / mathrm:generic_func &{ return $this->options['usemathrm'] && $mathrm === "\\mathrm"; } _ "{" f:generic_func &{ return $this->options['usemathrm'] && $this->tu->nullary_macro_in_mbox($f); } _ "}" _ /* make sure we can parse what we emit */ { return $this->options['usemathrm'] ? "\\mathrm {" . $f . "} " : false;} / f:generic_func &{ return $this->tu->nullary_macro_in_mbox($f); } _ // from Texutil.find(...) { return "\\mbox{" . $f . "} "; } / mbox:generic_func &{ return $mbox === "\\mbox"; } _ "{" f:generic_func &{ return $this->tu->nullary_macro_in_mbox($f); } _ "}" _ /* make sure we can parse what we emit */ { return "\\mbox{" . $f . "} "; } / f:(COLOR / DEFINECOLOR) { return $f; } / "\\" c:[, ;!_#%$&] _ { return "\\" . $c; } / c:[><~] _ { return $c; } / c:[%$] _ { if($this->options['oldtexvc']) { return "\\" . $c; /* escape dangerous chars */ } else { throw new SyntaxError("Deprecation: % and $ need to be escaped.", [], $this->text(), $this->offset(), $this->line(), $this->column(), $this->location()); }} DELIMITER = c:( delimiter_uf_lt / delimiter_uf_op / "[" ) _ { return $c; } / "\\" c:[{}|] _ { return "\\" . $c; } / f:generic_func &{ return $this->tu->other_delimiters1($f); } _ // from Texutil.find() { return $f . " "; } / f:generic_func &{ return $this->tu->other_delimiters2($f); } _ // from Texutil.find() { $parser = new Parser(); $p = $parser->parse($this->tu->other_delimiters2($f), $this->options); # assert.ok(p instanceof TexArray && p.length === 1); assert($p instanceof TexArray && count($p->getArgs()) === 1); # assert.ok(p.first() instanceof Literal); assert($p->first() instanceof Literal); return $p->first()->getArg(); } FUN_AR1nb = f:generic_func &{ return $this->tu->fun_ar1nb($f); } _ { return $f; } FUN_AR1opt = f:generic_func &{ return $this->tu->fun_ar1opt($f); } _ "[" _ { return $f; } NEXT_CELL = "&" _ LATEX_LENGTH = s:LATEX_SIGN? n:LATEX_NUMBER u:LATEX_UNIT { return new LengthSpec($s, $n, $u); } LATEX_SIGN = [+-] LATEX_NUMBER = literal_mn+ "."? literal_mn* / "." literal_mn+ // from http://latexref.xyz/Units-of-length.html LATEX_UNIT = "pt" / "pc" / "in" / "bp" / "cm" / "mm" / "dd" / "cc" / "sp" / "em" / "ex" / "mu" / "nd" / "nc" // not a real LaTeX unit, but common in user input and valid CSS as-is (T438415) / "px" NEXT_ROW = ("\\\\" s:("[" l:LATEX_LENGTH "]" { return $l; })? _ {return $s; }) BEGIN = "\\begin" _ END = "\\end" _ BEGIN_MATRIX = BEGIN "{matrix}" _ END_MATRIX = END "{matrix}" _ BEGIN_PMATRIX = BEGIN "{pmatrix}" _ END_PMATRIX = END "{pmatrix}" _ BEGIN_BMATRIX = BEGIN "{bmatrix}" _ END_BMATRIX = END "{bmatrix}" _ BEGIN_BBMATRIX = BEGIN "{Bmatrix}" _ END_BBMATRIX = END "{Bmatrix}" _ BEGIN_VMATRIX = BEGIN "{vmatrix}" _ END_VMATRIX = END "{vmatrix}" _ BEGIN_VVMATRIX = BEGIN "{Vmatrix}" _ END_VVMATRIX = END "{Vmatrix}" _ BEGIN_ARRAY = BEGIN "{array}" _ END_ARRAY = END "{array}" _ BEGIN_ALIGN = BEGIN "{align}" _ END_ALIGN = END "{align}" _ BEGIN_ALIGNED = BEGIN "{aligned}" _ END_ALIGNED = END "{aligned}" _ BEGIN_ALIGNAT = BEGIN "{alignat}" _ END_ALIGNAT = END "{alignat}" _ BEGIN_ALIGNEDAT = BEGIN "{alignedat}" _ END_ALIGNEDAT = END "{alignedat}" _ BEGIN_SMALLMATRIX = BEGIN "{smallmatrix}" _ END_SMALLMATRIX = END "{smallmatrix}" _ BEGIN_CASES = BEGIN "{cases}" _ END_CASES = END "{cases}" _ SQ_CLOSE = "]" _ CURLY_OPEN = "{" _ CURLY_CLOSE = "}" _ SUP = "^" _ SUB = "_" _ // This is from Texutil.find in texvc generic_func = "\\" alpha+ { return $this->text(); } BIG = f:generic_func &{ return $this->tu->big_literals($f); } _ { return $f; } FUN_AR1 = f:generic_func &{ return $this->tu->fun_ar1($f); } _ { return $f; } / f:generic_func &{ return $this->tu->other_fun_ar1($f); } _ { if ($this->options['oldtexvc']) { return $this->tu->other_fun_ar1($f); } else { throw new SyntaxError("Deprecation: \\Bbb and \\bold are not allowed in math mode.", [], $this->text(), $this->offset(), $this->line(), $this->column(), $this->location()); } } FUN_MHCHEM = f:generic_func &{ return $this->tu->fun_mhchem($f); } _ { return $f; } // The argument of \ce or \pu as written, with balanced braces RAW_GROUP = "{" arg:$RAW_CONTENT "}" _ { return $arg; } // A single-token argument without braces, e.g. \ce A RAW_TOKEN = arg:$( "\\" alpha+ / [^ \t\n\r{}\\] ) _ { return $arg; } RAW_CONTENT = ( [^{}\\] / "\\" . / "{" RAW_CONTENT "}" )* FUN_AR2 = f:generic_func &{ return $this->tu->fun_ar2($f); } _ { return $f; } FUN_AR4 = f:generic_func &{ return $this->tu->fun_ar4($f); } _ { return $f; } FUN_INFIX = f:generic_func &{ return $this->tu->fun_infix($f); } _ { return $f; } DECLARATION = f:generic_func &{ return $this->tu->declaration($f); } _ { return new Declaration($f, new TexArray()); } FUN_AR2nb = f:generic_func &{ return $this->tu->fun_ar2nb($f); } _ { return $f; } LEFTI = f:generic_func &{ return $this->tu->left_function($f); } _ RIGHTI = f:generic_func &{ return $this->tu->right_function($f); } _ HLINE = f:generic_func &{ return $this->tu->hline_function($f); } _ { return $f; } COLOR = f:generic_func &{ return $this->tu->color_function($f); } _ cs:COLOR_SPEC { return $f . " " . $cs; } DEFINECOLOR = f:generic_func &{ return $this->tu->definecolor_function($f); } _ "{" _ name:alpha+ _ "}" _ "{" _ a:( "named"i _ "}" _ cs:COLOR_SPEC_NAMED { return "{named}" . $cs; } / "gray"i _ "}" _ cs:COLOR_SPEC_GRAY { return "{gray}" . $cs; } / "rgb" _ "}" _ cs:COLOR_SPEC_rgb { return "{rgb}" . $cs; } // Note that we actually convert RGB format to rgb format here. / "RGB" _ "}" _ cs:COLOR_SPEC_RGBI { return "{rgb}" . $cs; } / "cmyk"i _ "}" _ cs:COLOR_SPEC_CMYK { return "{cmyk}" . $cs; } ) { return $f . " {" . join('',$name) . "}" . $a; } COLOR_SPEC = COLOR_SPEC_NAMED / "[" _ "named"i _ "]" _ cs:COLOR_SPEC_NAMED { return "[named]" . $cs; } / "[" _ "gray"i _ "]" _ cs:COLOR_SPEC_GRAY { return "[gray]" . $cs; } / "[" _ "rgb" _ "]" _ cs:COLOR_SPEC_rgb { return "[rgb]" . $cs; } / "[" _ "RGB" _ "]" _ cs:COLOR_SPEC_RGBI // Note that we actually convert RGB format to rgb format here. { return "[rgb]" . $cs; } / "[" _ "cmyk"i _ "]" _ cs:COLOR_SPEC_CMYK { return "[cmyk]" . $cs; } COLOR_SPEC_NAMED = "{" _ name:alpha+ _ "}" _ { return "{" . join('', $name) . "}"; } COLOR_SPEC_GRAY = "{" _ k:CNUM + "}" { $s = is_array($k) ? $k[0] : $k; return "{" . $s . "}";} COLOR_SPEC_rgb = "{" _ r:CNUM "," _ g:CNUM "," _ b:CNUM "}" _ { return "{" . $r . "," . $g . "," . $b . "}"; } COLOR_SPEC_RGBI = "{" _ r:CNUM255 "," _ g:CNUM255 "," _ b:CNUM255 "}" _ // Note that we normalize the values to [0,1] here. { return "{" . $r . "," . $g . "," . $b . "}"; } COLOR_SPEC_CMYK = "{" _ c:CNUM "," _ m:CNUM "," _ y:CNUM "," _ k:CNUM "}" _ { return "{" . $c . "," . $m . "," . $y . "," . $k . "}"; } // An integer in [0, 255] => normalize it to [0,1] CNUM255 = n:$( "0" / ([1-9] ([0-9] [0-9]?)? ) ) &{ return intval($n, 10) <= 255; } _ { return $n / 255; } // A floating-point number in [0, 1] CNUM = n:$( "0"? "." [0-9]+ ) _ { return $n; } / n:$( [01] "."? ) _ { return $n; } // Missing lexer tokens! FUN_INFIXh = impossible FUN_AR1hl = impossible FUN_AR1hf = impossible FUN_AR2h = impossible impossible = & { return false; } // End of file EOF = & { return $this->peg_currPos === $this->input_length; } |
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