| 1 |
<?php |
| 2 |
/** |
| 3 |
* SCSSPHP |
| 4 |
* |
| 5 |
* @copyright 2012-2014 Leaf Corcoran |
| 6 |
* |
| 7 |
* @license http://opensource.org/licenses/gpl-license GPL-3.0 |
| 8 |
* @license http://opensource.org/licenses/MIT MIT |
| 9 |
* |
| 10 |
* @link http://leafo.net/scssphp |
| 11 |
*/ |
| 12 |
|
| 13 |
namespace Leafo\ScssPhp; |
| 14 |
|
| 15 |
use Leafo\ScssPhp\Compiler; |
| 16 |
|
| 17 |
/** |
| 18 |
* SCSS parser |
| 19 |
* |
| 20 |
* @author Leaf Corcoran <leafot@gmail.com> |
| 21 |
*/ |
| 22 |
class Parser |
| 23 |
{ |
| 24 |
protected static $precedence = array( |
| 25 |
'or' => 0, |
| 26 |
'and' => 1, |
| 27 |
|
| 28 |
'==' => 2, |
| 29 |
'!=' => 2, |
| 30 |
'<=' => 2, |
| 31 |
'>=' => 2, |
| 32 |
'=' => 2, |
| 33 |
'<' => 3, |
| 34 |
'>' => 2, |
| 35 |
|
| 36 |
'+' => 3, |
| 37 |
'-' => 3, |
| 38 |
'*' => 4, |
| 39 |
'/' => 4, |
| 40 |
'%' => 4, |
| 41 |
); |
| 42 |
|
| 43 |
protected static $operators = array('+', '-', '*', '/', '%', |
| 44 |
'==', '!=', '<=', '>=', '<', '>', 'and', 'or'); |
| 45 |
|
| 46 |
protected static $operatorStr; |
| 47 |
protected static $whitePattern; |
| 48 |
protected static $commentMulti; |
| 49 |
|
| 50 |
protected static $commentSingle = '//'; |
| 51 |
protected static $commentMultiLeft = '/*'; |
| 52 |
protected static $commentMultiRight = '*/'; |
| 53 |
|
| 54 |
/** |
| 55 |
* Constructor |
| 56 |
* |
| 57 |
* @param string $sourceName |
| 58 |
* @param boolean $rootParser |
| 59 |
*/ |
| 60 |
public function __construct($sourceName = null, $rootParser = true) |
| 61 |
{ |
| 62 |
$this->sourceName = $sourceName; |
| 63 |
$this->rootParser = $rootParser; |
| 64 |
|
| 65 |
if (empty(self::$operatorStr)) { |
| 66 |
self::$operatorStr = $this->makeOperatorStr(self::$operators); |
| 67 |
|
| 68 |
$commentSingle = $this->pregQuote(self::$commentSingle); |
| 69 |
$commentMultiLeft = $this->pregQuote(self::$commentMultiLeft); |
| 70 |
$commentMultiRight = $this->pregQuote(self::$commentMultiRight); |
| 71 |
self::$commentMulti = $commentMultiLeft.'.*?'.$commentMultiRight; |
| 72 |
self::$whitePattern = '/'.$commentSingle.'[^\n]*\s*|('.self::$commentMulti.')\s*|\s+/Ais'; |
| 73 |
} |
| 74 |
} |
| 75 |
|
| 76 |
protected static function makeOperatorStr($operators) |
| 77 |
{ |
| 78 |
return '(' |
| 79 |
. implode('|', array_map(array('Leafo\ScssPhp\Parser','pregQuote'), $operators)) |
| 80 |
. ')'; |
| 81 |
} |
| 82 |
|
| 83 |
/** |
| 84 |
* Parser buffer |
| 85 |
* |
| 86 |
* @param string $buffer; |
| 87 |
* |
| 88 |
* @return \StdClass |
| 89 |
*/ |
| 90 |
public function parse($buffer) |
| 91 |
{ |
| 92 |
$this->count = 0; |
| 93 |
$this->env = null; |
| 94 |
$this->inParens = false; |
| 95 |
$this->eatWhiteDefault = true; |
| 96 |
$this->buffer = $buffer; |
| 97 |
|
| 98 |
$this->pushBlock(null); // root block |
| 99 |
|
| 100 |
$this->whitespace(); |
| 101 |
$this->pushBlock(null); |
| 102 |
$this->popBlock(); |
| 103 |
|
| 104 |
while (false !== $this->parseChunk()) { |
| 105 |
; |
| 106 |
} |
| 107 |
|
| 108 |
if ($this->count != strlen($this->buffer)) { |
| 109 |
$this->throwParseError(); |
| 110 |
} |
| 111 |
|
| 112 |
if (!empty($this->env->parent)) { |
| 113 |
$this->throwParseError('unclosed block'); |
| 114 |
} |
| 115 |
|
| 116 |
$this->env->isRoot = true; |
| 117 |
|
| 118 |
return $this->env; |
| 119 |
} |
| 120 |
|
| 121 |
/** |
| 122 |
* Parse a single chunk off the head of the buffer and append it to the |
| 123 |
* current parse environment. |
| 124 |
* |
| 125 |
* Returns false when the buffer is empty, or when there is an error. |
| 126 |
* |
| 127 |
* This function is called repeatedly until the entire document is |
| 128 |
* parsed. |
| 129 |
* |
| 130 |
* This parser is most similar to a recursive descent parser. Single |
| 131 |
* functions represent discrete grammatical rules for the language, and |
| 132 |
* they are able to capture the text that represents those rules. |
| 133 |
* |
| 134 |
* Consider the function Compiler::keyword(). (All parse functions are |
| 135 |
* structured the same.) |
| 136 |
* |
| 137 |
* The function takes a single reference argument. When calling the |
| 138 |
* function it will attempt to match a keyword on the head of the buffer. |
| 139 |
* If it is successful, it will place the keyword in the referenced |
| 140 |
* argument, advance the position in the buffer, and return true. If it |
| 141 |
* fails then it won't advance the buffer and it will return false. |
| 142 |
* |
| 143 |
* All of these parse functions are powered by Compiler::match(), which behaves |
| 144 |
* the same way, but takes a literal regular expression. Sometimes it is |
| 145 |
* more convenient to use match instead of creating a new function. |
| 146 |
* |
| 147 |
* Because of the format of the functions, to parse an entire string of |
| 148 |
* grammatical rules, you can chain them together using &&. |
| 149 |
* |
| 150 |
* But, if some of the rules in the chain succeed before one fails, then |
| 151 |
* the buffer position will be left at an invalid state. In order to |
| 152 |
* avoid this, Compiler::seek() is used to remember and set buffer positions. |
| 153 |
* |
| 154 |
* Before parsing a chain, use $s = $this->seek() to remember the current |
| 155 |
* position into $s. Then if a chain fails, use $this->seek($s) to |
| 156 |
* go back where we started. |
| 157 |
* |
| 158 |
* @return boolean |
| 159 |
*/ |
| 160 |
protected function parseChunk() |
| 161 |
{ |
| 162 |
$s = $this->seek(); |
| 163 |
|
| 164 |
// the directives |
| 165 |
if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == '@') { |
| 166 |
if ($this->literal('@media') && $this->mediaQueryList($mediaQueryList) && $this->literal('{')) { |
| 167 |
$media = $this->pushSpecialBlock('media'); |
| 168 |
$media->queryList = $mediaQueryList[2]; |
| 169 |
|
| 170 |
return true; |
| 171 |
} |
| 172 |
|
| 173 |
$this->seek($s); |
| 174 |
|
| 175 |
if ($this->literal('@mixin') && |
| 176 |
$this->keyword($mixinName) && |
| 177 |
($this->argumentDef($args) || true) && |
| 178 |
$this->literal('{') |
| 179 |
) { |
| 180 |
$mixin = $this->pushSpecialBlock('mixin'); |
| 181 |
$mixin->name = $mixinName; |
| 182 |
$mixin->args = $args; |
| 183 |
|
| 184 |
return true; |
| 185 |
} |
| 186 |
|
| 187 |
$this->seek($s); |
| 188 |
|
| 189 |
if ($this->literal('@include') && |
| 190 |
$this->keyword($mixinName) && |
| 191 |
($this->literal('(') && |
| 192 |
($this->argValues($argValues) || true) && |
| 193 |
$this->literal(')') || true) && |
| 194 |
($this->end() || |
| 195 |
$this->literal('{') && $hasBlock = true) |
| 196 |
) { |
| 197 |
$child = array('include', |
| 198 |
$mixinName, isset($argValues) ? $argValues : null, null); |
| 199 |
|
| 200 |
if (!empty($hasBlock)) { |
| 201 |
$include = $this->pushSpecialBlock('include'); |
| 202 |
$include->child = $child; |
| 203 |
} else { |
| 204 |
$this->append($child, $s); |
| 205 |
} |
| 206 |
|
| 207 |
return true; |
| 208 |
} |
| 209 |
|
| 210 |
$this->seek($s); |
| 211 |
|
| 212 |
if ($this->literal('@import') && |
| 213 |
$this->valueList($importPath) && |
| 214 |
$this->end() |
| 215 |
) { |
| 216 |
$this->append(array('import', $importPath), $s); |
| 217 |
|
| 218 |
return true; |
| 219 |
} |
| 220 |
|
| 221 |
$this->seek($s); |
| 222 |
|
| 223 |
if ($this->literal('@extend') && |
| 224 |
$this->selectors($selector) && |
| 225 |
$this->end() |
| 226 |
) { |
| 227 |
$this->append(array('extend', $selector), $s); |
| 228 |
|
| 229 |
return true; |
| 230 |
} |
| 231 |
|
| 232 |
$this->seek($s); |
| 233 |
|
| 234 |
if ($this->literal('@function') && |
| 235 |
$this->keyword($fnName) && |
| 236 |
$this->argumentDef($args) && |
| 237 |
$this->literal('{') |
| 238 |
) { |
| 239 |
$func = $this->pushSpecialBlock('function'); |
| 240 |
$func->name = $fnName; |
| 241 |
$func->args = $args; |
| 242 |
|
| 243 |
return true; |
| 244 |
} |
| 245 |
|
| 246 |
$this->seek($s); |
| 247 |
|
| 248 |
if ($this->literal('@return') && $this->valueList($retVal) && $this->end()) { |
| 249 |
$this->append(array('return', $retVal), $s); |
| 250 |
|
| 251 |
return true; |
| 252 |
} |
| 253 |
|
| 254 |
$this->seek($s); |
| 255 |
|
| 256 |
if ($this->literal('@each') && |
| 257 |
$this->variable($varName) && |
| 258 |
$this->literal('in') && |
| 259 |
$this->valueList($list) && |
| 260 |
$this->literal('{') |
| 261 |
) { |
| 262 |
$each = $this->pushSpecialBlock('each'); |
| 263 |
$each->var = $varName[1]; |
| 264 |
$each->list = $list; |
| 265 |
|
| 266 |
return true; |
| 267 |
} |
| 268 |
|
| 269 |
$this->seek($s); |
| 270 |
|
| 271 |
if ($this->literal('@while') && |
| 272 |
$this->expression($cond) && |
| 273 |
$this->literal('{') |
| 274 |
) { |
| 275 |
$while = $this->pushSpecialBlock('while'); |
| 276 |
$while->cond = $cond; |
| 277 |
|
| 278 |
return true; |
| 279 |
} |
| 280 |
|
| 281 |
$this->seek($s); |
| 282 |
|
| 283 |
if ($this->literal('@for') && |
| 284 |
$this->variable($varName) && |
| 285 |
$this->literal('from') && |
| 286 |
$this->expression($start) && |
| 287 |
($this->literal('through') || |
| 288 |
($forUntil = true && $this->literal('to'))) && |
| 289 |
$this->expression($end) && |
| 290 |
$this->literal('{') |
| 291 |
) { |
| 292 |
$for = $this->pushSpecialBlock('for'); |
| 293 |
$for->var = $varName[1]; |
| 294 |
$for->start = $start; |
| 295 |
$for->end = $end; |
| 296 |
$for->until = isset($forUntil); |
| 297 |
|
| 298 |
return true; |
| 299 |
} |
| 300 |
|
| 301 |
$this->seek($s); |
| 302 |
|
| 303 |
if ($this->literal('@if') && $this->valueList($cond) && $this->literal('{')) { |
| 304 |
$if = $this->pushSpecialBlock('if'); |
| 305 |
$if->cond = $cond; |
| 306 |
$if->cases = array(); |
| 307 |
|
| 308 |
return true; |
| 309 |
} |
| 310 |
|
| 311 |
$this->seek($s); |
| 312 |
|
| 313 |
if (($this->literal('@debug') || $this->literal('@warn')) && |
| 314 |
$this->valueList($value) && |
| 315 |
$this->end()) { |
| 316 |
$this->append(array('debug', $value, $s), $s); |
| 317 |
|
| 318 |
return true; |
| 319 |
} |
| 320 |
|
| 321 |
$this->seek($s); |
| 322 |
|
| 323 |
if ($this->literal('@content') && $this->end()) { |
| 324 |
$this->append(array('mixin_content'), $s); |
| 325 |
|
| 326 |
return true; |
| 327 |
} |
| 328 |
|
| 329 |
$this->seek($s); |
| 330 |
|
| 331 |
$last = $this->last(); |
| 332 |
if (isset($last) && $last[0] == 'if') { |
| 333 |
list(, $if) = $last; |
| 334 |
|
| 335 |
if ($this->literal('@else')) { |
| 336 |
if ($this->literal('{')) { |
| 337 |
$else = $this->pushSpecialBlock('else'); |
| 338 |
} elseif ($this->literal('if') && $this->valueList($cond) && $this->literal('{')) { |
| 339 |
$else = $this->pushSpecialBlock('elseif'); |
| 340 |
$else->cond = $cond; |
| 341 |
} |
| 342 |
|
| 343 |
if (isset($else)) { |
| 344 |
$else->dontAppend = true; |
| 345 |
$if->cases[] = $else; |
| 346 |
|
| 347 |
return true; |
| 348 |
} |
| 349 |
} |
| 350 |
|
| 351 |
$this->seek($s); |
| 352 |
} |
| 353 |
|
| 354 |
if ($this->literal('@charset') && |
| 355 |
$this->valueList($charset) && $this->end() |
| 356 |
) { |
| 357 |
$this->append(array('charset', $charset), $s); |
| 358 |
|
| 359 |
return true; |
| 360 |
} |
| 361 |
|
| 362 |
$this->seek($s); |
| 363 |
|
| 364 |
// doesn't match built in directive, do generic one |
| 365 |
if ($this->literal('@', false) && $this->keyword($dirName) && |
| 366 |
($this->variable($dirValue) || $this->openString('{', $dirValue) || true) && |
| 367 |
$this->literal('{') |
| 368 |
) { |
| 369 |
$directive = $this->pushSpecialBlock('directive'); |
| 370 |
$directive->name = $dirName; |
| 371 |
|
| 372 |
if (isset($dirValue)) { |
| 373 |
$directive->value = $dirValue; |
| 374 |
} |
| 375 |
|
| 376 |
return true; |
| 377 |
} |
| 378 |
|
| 379 |
$this->seek($s); |
| 380 |
|
| 381 |
return false; |
| 382 |
} |
| 383 |
|
| 384 |
// property shortcut |
| 385 |
// captures most properties before having to parse a selector |
| 386 |
if ($this->keyword($name, false) && |
| 387 |
$this->literal(': ') && |
| 388 |
$this->valueList($value) && |
| 389 |
$this->end() |
| 390 |
) { |
| 391 |
$name = array('string', '', array($name)); |
| 392 |
$this->append(array('assign', $name, $value), $s); |
| 393 |
|
| 394 |
return true; |
| 395 |
} |
| 396 |
|
| 397 |
$this->seek($s); |
| 398 |
|
| 399 |
// variable assigns |
| 400 |
if ($this->variable($name) && |
| 401 |
$this->literal(':') && |
| 402 |
$this->valueList($value) && $this->end() |
| 403 |
) { |
| 404 |
// check for !default |
| 405 |
$defaultVar = $value[0] == 'list' && $this->stripDefault($value); |
| 406 |
$this->append(array('assign', $name, $value, $defaultVar), $s); |
| 407 |
|
| 408 |
return true; |
| 409 |
} |
| 410 |
|
| 411 |
$this->seek($s); |
| 412 |
|
| 413 |
// misc |
| 414 |
if ($this->literal('-->')) { |
| 415 |
return true; |
| 416 |
} |
| 417 |
|
| 418 |
// opening css block |
| 419 |
if ($this->selectors($selectors) && $this->literal('{')) { |
| 420 |
$b = $this->pushBlock($selectors); |
| 421 |
|
| 422 |
return true; |
| 423 |
} |
| 424 |
|
| 425 |
$this->seek($s); |
| 426 |
|
| 427 |
// property assign, or nested assign |
| 428 |
if ($this->propertyName($name) && $this->literal(':')) { |
| 429 |
$foundSomething = false; |
| 430 |
if ($this->valueList($value)) { |
| 431 |
$this->append(array('assign', $name, $value), $s); |
| 432 |
$foundSomething = true; |
| 433 |
} |
| 434 |
|
| 435 |
if ($this->literal('{')) { |
| 436 |
$propBlock = $this->pushSpecialBlock('nestedprop'); |
| 437 |
$propBlock->prefix = $name; |
| 438 |
$foundSomething = true; |
| 439 |
} elseif ($foundSomething) { |
| 440 |
$foundSomething = $this->end(); |
| 441 |
} |
| 442 |
|
| 443 |
if ($foundSomething) { |
| 444 |
return true; |
| 445 |
} |
| 446 |
} |
| 447 |
|
| 448 |
$this->seek($s); |
| 449 |
|
| 450 |
// closing a block |
| 451 |
if ($this->literal('}')) { |
| 452 |
$block = $this->popBlock(); |
| 453 |
|
| 454 |
if (isset($block->type) && $block->type == 'include') { |
| 455 |
$include = $block->child; |
| 456 |
unset($block->child); |
| 457 |
$include[3] = $block; |
| 458 |
$this->append($include, $s); |
| 459 |
} elseif (empty($block->dontAppend)) { |
| 460 |
$type = isset($block->type) ? $block->type : 'block'; |
| 461 |
$this->append(array($type, $block), $s); |
| 462 |
} |
| 463 |
|
| 464 |
return true; |
| 465 |
} |
| 466 |
|
| 467 |
// extra stuff |
| 468 |
if ($this->literal(';') || |
| 469 |
$this->literal('<!--') |
| 470 |
) { |
| 471 |
return true; |
| 472 |
} |
| 473 |
|
| 474 |
return false; |
| 475 |
} |
| 476 |
|
| 477 |
protected function stripDefault(&$value) |
| 478 |
{ |
| 479 |
$def = end($value[2]); |
| 480 |
|
| 481 |
if ($def[0] == 'keyword' && $def[1] == '!default') { |
| 482 |
array_pop($value[2]); |
| 483 |
$value = $this->flattenList($value); |
| 484 |
|
| 485 |
return true; |
| 486 |
} |
| 487 |
|
| 488 |
if ($def[0] == 'list') { |
| 489 |
return $this->stripDefault($value[2][count($value[2]) - 1]); |
| 490 |
} |
| 491 |
|
| 492 |
return false; |
| 493 |
} |
| 494 |
|
| 495 |
protected function literal($what, $eatWhitespace = null) |
| 496 |
{ |
| 497 |
if (!isset($eatWhitespace)) { |
| 498 |
$eatWhitespace = $this->eatWhiteDefault; |
| 499 |
} |
| 500 |
|
| 501 |
// shortcut on single letter |
| 502 |
if (!isset($what[1]) && isset($this->buffer[$this->count])) { |
| 503 |
if ($this->buffer[$this->count] == $what) { |
| 504 |
if (!$eatWhitespace) { |
| 505 |
$this->count++; |
| 506 |
|
| 507 |
return true; |
| 508 |
} |
| 509 |
// goes below... |
| 510 |
} else { |
| 511 |
return false; |
| 512 |
} |
| 513 |
} |
| 514 |
|
| 515 |
return $this->match($this->pregQuote($what), $m, $eatWhitespace); |
| 516 |
} |
| 517 |
|
| 518 |
// tree builders |
| 519 |
|
| 520 |
protected function pushBlock($selectors) |
| 521 |
{ |
| 522 |
$b = new \stdClass; |
| 523 |
$b->parent = $this->env; // not sure if we need this yet |
| 524 |
|
| 525 |
$b->selectors = $selectors; |
| 526 |
$b->comments = array(); |
| 527 |
|
| 528 |
if (!$this->env) { |
| 529 |
$b->children = array(); |
| 530 |
} elseif (empty($this->env->children)) { |
| 531 |
$this->env->children = $this->env->comments; |
| 532 |
$b->children = array(); |
| 533 |
$this->env->comments = array(); |
| 534 |
} else { |
| 535 |
$b->children = $this->env->comments; |
| 536 |
$this->env->comments = array(); |
| 537 |
} |
| 538 |
|
| 539 |
$this->env = $b; |
| 540 |
|
| 541 |
return $b; |
| 542 |
} |
| 543 |
|
| 544 |
protected function pushSpecialBlock($type) |
| 545 |
{ |
| 546 |
$block = $this->pushBlock(null); |
| 547 |
$block->type = $type; |
| 548 |
|
| 549 |
return $block; |
| 550 |
} |
| 551 |
|
| 552 |
protected function popBlock() |
| 553 |
{ |
| 554 |
$block = $this->env; |
| 555 |
|
| 556 |
if (empty($block->parent)) { |
| 557 |
$this->throwParseError('unexpected }'); |
| 558 |
} |
| 559 |
|
| 560 |
$this->env = $block->parent; |
| 561 |
unset($block->parent); |
| 562 |
|
| 563 |
$comments = $block->comments; |
| 564 |
if (count($comments)) { |
| 565 |
$this->env->comments = $comments; |
| 566 |
unset($block->comments); |
| 567 |
} |
| 568 |
|
| 569 |
return $block; |
| 570 |
} |
| 571 |
|
| 572 |
protected function appendComment($comment) |
| 573 |
{ |
| 574 |
$comment[1] = substr(preg_replace(array('/^\s+/m', '/^(.)/m'), array('', ' \1'), $comment[1]), 1); |
| 575 |
|
| 576 |
$this->env->comments[] = $comment; |
| 577 |
} |
| 578 |
|
| 579 |
protected function append($statement, $pos = null) |
| 580 |
{ |
| 581 |
if ($pos !== null) { |
| 582 |
$statement[-1] = $pos; |
| 583 |
|
| 584 |
if (!$this->rootParser) { |
| 585 |
$statement[-2] = $this; |
| 586 |
} |
| 587 |
} |
| 588 |
|
| 589 |
$this->env->children[] = $statement; |
| 590 |
|
| 591 |
$comments = $this->env->comments; |
| 592 |
if (count($comments)) { |
| 593 |
$this->env->children = array_merge($this->env->children, $comments); |
| 594 |
$this->env->comments = array(); |
| 595 |
} |
| 596 |
} |
| 597 |
|
| 598 |
// last child that was appended |
| 599 |
protected function last() |
| 600 |
{ |
| 601 |
$i = count($this->env->children) - 1; |
| 602 |
|
| 603 |
if (isset($this->env->children[$i])) { |
| 604 |
return $this->env->children[$i]; |
| 605 |
} |
| 606 |
} |
| 607 |
|
| 608 |
// high level parsers (they return parts of ast) |
| 609 |
|
| 610 |
protected function mediaQueryList(&$out) |
| 611 |
{ |
| 612 |
return $this->genericList($out, 'mediaQuery', ',', false); |
| 613 |
} |
| 614 |
|
| 615 |
protected function mediaQuery(&$out) |
| 616 |
{ |
| 617 |
$s = $this->seek(); |
| 618 |
|
| 619 |
$expressions = null; |
| 620 |
$parts = array(); |
| 621 |
|
| 622 |
if (($this->literal('only') && ($only = true) || $this->literal('not') && ($not = true) || true) && |
| 623 |
$this->mixedKeyword($mediaType) |
| 624 |
) { |
| 625 |
$prop = array('mediaType'); |
| 626 |
|
| 627 |
if (isset($only)) { |
| 628 |
$prop[] = array('keyword', 'only'); |
| 629 |
} |
| 630 |
|
| 631 |
if (isset($not)) { |
| 632 |
$prop[] = array('keyword', 'not'); |
| 633 |
} |
| 634 |
|
| 635 |
$media = array('list', '', array()); |
| 636 |
|
| 637 |
foreach ((array)$mediaType as $type) { |
| 638 |
if (is_array($type)) { |
| 639 |
$media[2][] = $type; |
| 640 |
} else { |
| 641 |
$media[2][] = array('keyword', $type); |
| 642 |
} |
| 643 |
} |
| 644 |
|
| 645 |
$prop[] = $media; |
| 646 |
$parts[] = $prop; |
| 647 |
} |
| 648 |
|
| 649 |
if (empty($parts) || $this->literal('and')) { |
| 650 |
$this->genericList($expressions, 'mediaExpression', 'and', false); |
| 651 |
|
| 652 |
if (is_array($expressions)) { |
| 653 |
$parts = array_merge($parts, $expressions[2]); |
| 654 |
} |
| 655 |
} |
| 656 |
|
| 657 |
$out = $parts; |
| 658 |
|
| 659 |
return true; |
| 660 |
} |
| 661 |
|
| 662 |
protected function mediaExpression(&$out) |
| 663 |
{ |
| 664 |
$s = $this->seek(); |
| 665 |
$value = null; |
| 666 |
|
| 667 |
if ($this->literal('(') && |
| 668 |
$this->expression($feature) && |
| 669 |
($this->literal(':') && $this->expression($value) || true) && |
| 670 |
$this->literal(')') |
| 671 |
) { |
| 672 |
$out = array('mediaExp', $feature); |
| 673 |
|
| 674 |
if ($value) { |
| 675 |
$out[] = $value; |
| 676 |
} |
| 677 |
|
| 678 |
return true; |
| 679 |
} |
| 680 |
|
| 681 |
$this->seek($s); |
| 682 |
|
| 683 |
return false; |
| 684 |
} |
| 685 |
|
| 686 |
protected function argValues(&$out) |
| 687 |
{ |
| 688 |
if ($this->genericList($list, 'argValue', ',', false)) { |
| 689 |
$out = $list[2]; |
| 690 |
|
| 691 |
return true; |
| 692 |
} |
| 693 |
|
| 694 |
return false; |
| 695 |
} |
| 696 |
|
| 697 |
protected function argValue(&$out) |
| 698 |
{ |
| 699 |
$s = $this->seek(); |
| 700 |
|
| 701 |
$keyword = null; |
| 702 |
if (!$this->variable($keyword) || !$this->literal(':')) { |
| 703 |
$this->seek($s); |
| 704 |
$keyword = null; |
| 705 |
} |
| 706 |
|
| 707 |
if ($this->genericList($value, 'expression')) { |
| 708 |
$out = array($keyword, $value, false); |
| 709 |
$s = $this->seek(); |
| 710 |
|
| 711 |
if ($this->literal('...')) { |
| 712 |
$out[2] = true; |
| 713 |
} else { |
| 714 |
$this->seek($s); |
| 715 |
} |
| 716 |
|
| 717 |
return true; |
| 718 |
} |
| 719 |
|
| 720 |
return false; |
| 721 |
} |
| 722 |
|
| 723 |
/** |
| 724 |
* Parse list |
| 725 |
* |
| 726 |
* @param string $out |
| 727 |
* |
| 728 |
* @return boolean |
| 729 |
*/ |
| 730 |
public function valueList(&$out) |
| 731 |
{ |
| 732 |
return $this->genericList($out, 'spaceList', ','); |
| 733 |
} |
| 734 |
|
| 735 |
protected function spaceList(&$out) |
| 736 |
{ |
| 737 |
return $this->genericList($out, 'expression'); |
| 738 |
} |
| 739 |
|
| 740 |
protected function genericList(&$out, $parseItem, $delim = '', $flatten = true) |
| 741 |
{ |
| 742 |
$s = $this->seek(); |
| 743 |
$items = array(); |
| 744 |
|
| 745 |
while ($this->$parseItem($value)) { |
| 746 |
$items[] = $value; |
| 747 |
|
| 748 |
if ($delim) { |
| 749 |
if (!$this->literal($delim)) { |
| 750 |
break; |
| 751 |
} |
| 752 |
} |
| 753 |
} |
| 754 |
|
| 755 |
if (count($items) == 0) { |
| 756 |
$this->seek($s); |
| 757 |
|
| 758 |
return false; |
| 759 |
} |
| 760 |
|
| 761 |
if ($flatten && count($items) == 1) { |
| 762 |
$out = $items[0]; |
| 763 |
} else { |
| 764 |
$out = array('list', $delim, $items); |
| 765 |
} |
| 766 |
|
| 767 |
return true; |
| 768 |
} |
| 769 |
|
| 770 |
protected function expression(&$out) |
| 771 |
{ |
| 772 |
$s = $this->seek(); |
| 773 |
|
| 774 |
if ($this->literal('(')) { |
| 775 |
if ($this->literal(')')) { |
| 776 |
$out = array('list', '', array()); |
| 777 |
|
| 778 |
return true; |
| 779 |
} |
| 780 |
|
| 781 |
if ($this->valueList($out) && $this->literal(')') && $out[0] == 'list') { |
| 782 |
return true; |
| 783 |
} |
| 784 |
|
| 785 |
$this->seek($s); |
| 786 |
} |
| 787 |
|
| 788 |
if ($this->value($lhs)) { |
| 789 |
$out = $this->expHelper($lhs, 0); |
| 790 |
|
| 791 |
return true; |
| 792 |
} |
| 793 |
|
| 794 |
return false; |
| 795 |
} |
| 796 |
|
| 797 |
protected function expHelper($lhs, $minP) |
| 798 |
{ |
| 799 |
$opstr = self::$operatorStr; |
| 800 |
|
| 801 |
$ss = $this->seek(); |
| 802 |
$whiteBefore = isset($this->buffer[$this->count - 1]) && |
| 803 |
ctype_space($this->buffer[$this->count - 1]); |
| 804 |
|
| 805 |
while ($this->match($opstr, $m) && self::$precedence[$m[1]] >= $minP) { |
| 806 |
$whiteAfter = isset($this->buffer[$this->count - 1]) && |
| 807 |
ctype_space($this->buffer[$this->count - 1]); |
| 808 |
|
| 809 |
$op = $m[1]; |
| 810 |
|
| 811 |
// don't turn negative numbers into expressions |
| 812 |
if ($op == '-' && $whiteBefore) { |
| 813 |
if (!$whiteAfter) { |
| 814 |
break; |
| 815 |
} |
| 816 |
} |
| 817 |
|
| 818 |
if (!$this->value($rhs)) { |
| 819 |
break; |
| 820 |
} |
| 821 |
|
| 822 |
// peek and see if rhs belongs to next operator |
| 823 |
if ($this->peek($opstr, $next) && self::$precedence[$next[1]] > self::$precedence[$op]) { |
| 824 |
$rhs = $this->expHelper($rhs, self::$precedence[$next[1]]); |
| 825 |
} |
| 826 |
|
| 827 |
$lhs = array('exp', $op, $lhs, $rhs, $this->inParens, $whiteBefore, $whiteAfter); |
| 828 |
$ss = $this->seek(); |
| 829 |
$whiteBefore = isset($this->buffer[$this->count - 1]) && |
| 830 |
ctype_space($this->buffer[$this->count - 1]); |
| 831 |
} |
| 832 |
|
| 833 |
$this->seek($ss); |
| 834 |
|
| 835 |
return $lhs; |
| 836 |
} |
| 837 |
|
| 838 |
protected function value(&$out) |
| 839 |
{ |
| 840 |
$s = $this->seek(); |
| 841 |
|
| 842 |
if ($this->literal('not', false) && $this->whitespace() && $this->value($inner)) { |
| 843 |
$out = array('unary', 'not', $inner, $this->inParens); |
| 844 |
|
| 845 |
return true; |
| 846 |
} |
| 847 |
|
| 848 |
$this->seek($s); |
| 849 |
|
| 850 |
if ($this->literal('+') && $this->value($inner)) { |
| 851 |
$out = array('unary', '+', $inner, $this->inParens); |
| 852 |
|
| 853 |
return true; |
| 854 |
} |
| 855 |
|
| 856 |
$this->seek($s); |
| 857 |
|
| 858 |
// negation |
| 859 |
if ($this->literal('-', false) && |
| 860 |
($this->variable($inner) || |
| 861 |
$this->unit($inner) || |
| 862 |
$this->parenValue($inner)) |
| 863 |
) { |
| 864 |
$out = array('unary', '-', $inner, $this->inParens); |
| 865 |
|
| 866 |
return true; |
| 867 |
} |
| 868 |
|
| 869 |
$this->seek($s); |
| 870 |
|
| 871 |
if ($this->parenValue($out) || |
| 872 |
$this->interpolation($out) || |
| 873 |
$this->variable($out) || |
| 874 |
$this->color($out) || |
| 875 |
$this->unit($out) || |
| 876 |
$this->string($out) || |
| 877 |
$this->func($out) || |
| 878 |
$this->progid($out) |
| 879 |
) { |
| 880 |
return true; |
| 881 |
} |
| 882 |
|
| 883 |
if ($this->keyword($keyword)) { |
| 884 |
if ($keyword == 'null') { |
| 885 |
$out = array('null'); |
| 886 |
} else { |
| 887 |
$out = array('keyword', $keyword); |
| 888 |
} |
| 889 |
|
| 890 |
return true; |
| 891 |
} |
| 892 |
|
| 893 |
return false; |
| 894 |
} |
| 895 |
|
| 896 |
// value wrappen in parentheses |
| 897 |
protected function parenValue(&$out) |
| 898 |
{ |
| 899 |
$s = $this->seek(); |
| 900 |
|
| 901 |
$inParens = $this->inParens; |
| 902 |
|
| 903 |
if ($this->literal('(') && |
| 904 |
($this->inParens = true) && $this->expression($exp) && |
| 905 |
$this->literal(')') |
| 906 |
) { |
| 907 |
$out = $exp; |
| 908 |
$this->inParens = $inParens; |
| 909 |
|
| 910 |
return true; |
| 911 |
} |
| 912 |
|
| 913 |
$this->inParens = $inParens; |
| 914 |
$this->seek($s); |
| 915 |
|
| 916 |
return false; |
| 917 |
} |
| 918 |
|
| 919 |
protected function progid(&$out) |
| 920 |
{ |
| 921 |
$s = $this->seek(); |
| 922 |
|
| 923 |
if ($this->literal('progid:', false) && |
| 924 |
$this->openString('(', $fn) && |
| 925 |
$this->literal('(') |
| 926 |
) { |
| 927 |
$this->openString(')', $args, '('); |
| 928 |
if ($this->literal(')')) { |
| 929 |
$out = array('string', '', array( |
| 930 |
'progid:', $fn, '(', $args, ')' |
| 931 |
)); |
| 932 |
|
| 933 |
return true; |
| 934 |
} |
| 935 |
} |
| 936 |
|
| 937 |
$this->seek($s); |
| 938 |
|
| 939 |
return false; |
| 940 |
} |
| 941 |
|
| 942 |
protected function func(&$func) |
| 943 |
{ |
| 944 |
$s = $this->seek(); |
| 945 |
|
| 946 |
if ($this->keyword($name, false) && |
| 947 |
$this->literal('(') |
| 948 |
) { |
| 949 |
if ($name == 'alpha' && $this->argumentList($args)) { |
| 950 |
$func = array('function', $name, array('string', '', $args)); |
| 951 |
|
| 952 |
return true; |
| 953 |
} |
| 954 |
|
| 955 |
if ($name != 'expression' && !preg_match('/^(-[a-z]+-)?calc$/', $name)) { |
| 956 |
$ss = $this->seek(); |
| 957 |
|
| 958 |
if ($this->argValues($args) && $this->literal(')')) { |
| 959 |
$func = array('fncall', $name, $args); |
| 960 |
|
| 961 |
return true; |
| 962 |
} |
| 963 |
|
| 964 |
$this->seek($ss); |
| 965 |
} |
| 966 |
|
| 967 |
if (($this->openString(')', $str, '(') || true ) && |
| 968 |
$this->literal(')') |
| 969 |
) { |
| 970 |
$args = array(); |
| 971 |
|
| 972 |
if (!empty($str)) { |
| 973 |
$args[] = array(null, array('string', '', array($str))); |
| 974 |
} |
| 975 |
|
| 976 |
$func = array('fncall', $name, $args); |
| 977 |
|
| 978 |
return true; |
| 979 |
} |
| 980 |
} |
| 981 |
|
| 982 |
$this->seek($s); |
| 983 |
|
| 984 |
return false; |
| 985 |
} |
| 986 |
|
| 987 |
protected function argumentList(&$out) |
| 988 |
{ |
| 989 |
$s = $this->seek(); |
| 990 |
$this->literal('('); |
| 991 |
|
| 992 |
$args = array(); |
| 993 |
|
| 994 |
while ($this->keyword($var)) { |
| 995 |
$ss = $this->seek(); |
| 996 |
|
| 997 |
if ($this->literal('=') && $this->expression($exp)) { |
| 998 |
$args[] = array('string', '', array($var.'=')); |
| 999 |
$arg = $exp; |
| 1000 |
} else { |
| 1001 |
break; |
| 1002 |
} |
| 1003 |
|
| 1004 |
$args[] = $arg; |
| 1005 |
|
| 1006 |
if (!$this->literal(',')) { |
| 1007 |
break; |
| 1008 |
} |
| 1009 |
|
| 1010 |
$args[] = array('string', '', array(', ')); |
| 1011 |
} |
| 1012 |
|
| 1013 |
if (!$this->literal(')') || !count($args)) { |
| 1014 |
$this->seek($s); |
| 1015 |
|
| 1016 |
return false; |
| 1017 |
} |
| 1018 |
|
| 1019 |
$out = $args; |
| 1020 |
|
| 1021 |
return true; |
| 1022 |
} |
| 1023 |
|
| 1024 |
protected function argumentDef(&$out) |
| 1025 |
{ |
| 1026 |
$s = $this->seek(); |
| 1027 |
$this->literal('('); |
| 1028 |
|
| 1029 |
$args = array(); |
| 1030 |
|
| 1031 |
while ($this->variable($var)) { |
| 1032 |
$arg = array($var[1], null, false); |
| 1033 |
|
| 1034 |
$ss = $this->seek(); |
| 1035 |
|
| 1036 |
if ($this->literal(':') && $this->genericList($defaultVal, 'expression')) { |
| 1037 |
$arg[1] = $defaultVal; |
| 1038 |
} else { |
| 1039 |
$this->seek($ss); |
| 1040 |
} |
| 1041 |
|
| 1042 |
$ss = $this->seek(); |
| 1043 |
|
| 1044 |
if ($this->literal('...')) { |
| 1045 |
$sss = $this->seek(); |
| 1046 |
|
| 1047 |
if (!$this->literal(')')) { |
| 1048 |
$this->throwParseError('... has to be after the final argument'); |
| 1049 |
} |
| 1050 |
|
| 1051 |
$arg[2] = true; |
| 1052 |
$this->seek($sss); |
| 1053 |
} else { |
| 1054 |
$this->seek($ss); |
| 1055 |
} |
| 1056 |
|
| 1057 |
$args[] = $arg; |
| 1058 |
|
| 1059 |
if (!$this->literal(',')) { |
| 1060 |
break; |
| 1061 |
} |
| 1062 |
} |
| 1063 |
|
| 1064 |
if (!$this->literal(')')) { |
| 1065 |
$this->seek($s); |
| 1066 |
|
| 1067 |
return false; |
| 1068 |
} |
| 1069 |
|
| 1070 |
$out = $args; |
| 1071 |
|
| 1072 |
return true; |
| 1073 |
} |
| 1074 |
|
| 1075 |
protected function color(&$out) |
| 1076 |
{ |
| 1077 |
$color = array('color'); |
| 1078 |
|
| 1079 |
if ($this->match('(#([0-9a-f]{6})|#([0-9a-f]{3}))', $m)) { |
| 1080 |
if (isset($m[3])) { |
| 1081 |
$num = $m[3]; |
| 1082 |
$width = 16; |
| 1083 |
} else { |
| 1084 |
$num = $m[2]; |
| 1085 |
$width = 256; |
| 1086 |
} |
| 1087 |
|
| 1088 |
$num = hexdec($num); |
| 1089 |
|
| 1090 |
foreach (array(3,2,1) as $i) { |
| 1091 |
$t = $num % $width; |
| 1092 |
$num /= $width; |
| 1093 |
|
| 1094 |
$color[$i] = $t * (256/$width) + $t * floor(16/$width); |
| 1095 |
} |
| 1096 |
|
| 1097 |
$out = $color; |
| 1098 |
|
| 1099 |
return true; |
| 1100 |
} |
| 1101 |
|
| 1102 |
return false; |
| 1103 |
} |
| 1104 |
|
| 1105 |
protected function unit(&$unit) |
| 1106 |
{ |
| 1107 |
if ($this->match('([0-9]*(\.)?[0-9]+)([%a-zA-Z]+)?', $m)) { |
| 1108 |
$unit = array('number', $m[1], empty($m[3]) ? '' : $m[3]); |
| 1109 |
|
| 1110 |
return true; |
| 1111 |
} |
| 1112 |
|
| 1113 |
return false; |
| 1114 |
} |
| 1115 |
|
| 1116 |
protected function string(&$out) |
| 1117 |
{ |
| 1118 |
$s = $this->seek(); |
| 1119 |
|
| 1120 |
if ($this->literal('"', false)) { |
| 1121 |
$delim = '"'; |
| 1122 |
} elseif ($this->literal('\'', false)) { |
| 1123 |
$delim = '\''; |
| 1124 |
} else { |
| 1125 |
return false; |
| 1126 |
} |
| 1127 |
|
| 1128 |
$content = array(); |
| 1129 |
$oldWhite = $this->eatWhiteDefault; |
| 1130 |
$this->eatWhiteDefault = false; |
| 1131 |
|
| 1132 |
while ($this->matchString($m, $delim)) { |
| 1133 |
$content[] = $m[1]; |
| 1134 |
|
| 1135 |
if ($m[2] == '#{') { |
| 1136 |
$this->count -= strlen($m[2]); |
| 1137 |
|
| 1138 |
if ($this->interpolation($inter, false)) { |
| 1139 |
$content[] = $inter; |
| 1140 |
} else { |
| 1141 |
$this->count += strlen($m[2]); |
| 1142 |
$content[] = '#{'; // ignore it |
| 1143 |
} |
| 1144 |
} elseif ($m[2] == '\\') { |
| 1145 |
$content[] = $m[2]; |
| 1146 |
|
| 1147 |
if ($this->literal($delim, false)) { |
| 1148 |
$content[] = $delim; |
| 1149 |
} |
| 1150 |
} else { |
| 1151 |
$this->count -= strlen($delim); |
| 1152 |
break; // delim |
| 1153 |
} |
| 1154 |
} |
| 1155 |
|
| 1156 |
$this->eatWhiteDefault = $oldWhite; |
| 1157 |
|
| 1158 |
if ($this->literal($delim)) { |
| 1159 |
$out = array('string', $delim, $content); |
| 1160 |
|
| 1161 |
return true; |
| 1162 |
} |
| 1163 |
|
| 1164 |
$this->seek($s); |
| 1165 |
|
| 1166 |
return false; |
| 1167 |
} |
| 1168 |
|
| 1169 |
protected function mixedKeyword(&$out) |
| 1170 |
{ |
| 1171 |
$s = $this->seek(); |
| 1172 |
|
| 1173 |
$parts = array(); |
| 1174 |
|
| 1175 |
$oldWhite = $this->eatWhiteDefault; |
| 1176 |
$this->eatWhiteDefault = false; |
| 1177 |
|
| 1178 |
while (true) { |
| 1179 |
if ($this->keyword($key)) { |
| 1180 |
$parts[] = $key; |
| 1181 |
continue; |
| 1182 |
} |
| 1183 |
|
| 1184 |
if ($this->interpolation($inter)) { |
| 1185 |
$parts[] = $inter; |
| 1186 |
continue; |
| 1187 |
} |
| 1188 |
|
| 1189 |
break; |
| 1190 |
} |
| 1191 |
|
| 1192 |
$this->eatWhiteDefault = $oldWhite; |
| 1193 |
|
| 1194 |
if (count($parts) == 0) { |
| 1195 |
return false; |
| 1196 |
} |
| 1197 |
|
| 1198 |
if ($this->eatWhiteDefault) { |
| 1199 |
$this->whitespace(); |
| 1200 |
} |
| 1201 |
|
| 1202 |
$out = $parts; |
| 1203 |
|
| 1204 |
return true; |
| 1205 |
} |
| 1206 |
|
| 1207 |
// an unbounded string stopped by $end |
| 1208 |
protected function openString($end, &$out, $nestingOpen = null) |
| 1209 |
{ |
| 1210 |
$oldWhite = $this->eatWhiteDefault; |
| 1211 |
$this->eatWhiteDefault = false; |
| 1212 |
|
| 1213 |
$stop = array('\'', '"', '#{', $end); |
| 1214 |
$stop = array_map(array($this, 'pregQuote'), $stop); |
| 1215 |
$stop[] = self::$commentMulti; |
| 1216 |
|
| 1217 |
$patt = '(.*?)('.implode('|', $stop).')'; |
| 1218 |
|
| 1219 |
$nestingLevel = 0; |
| 1220 |
|
| 1221 |
$content = array(); |
| 1222 |
while ($this->match($patt, $m, false)) { |
| 1223 |
if (isset($m[1]) && $m[1] !== '') { |
| 1224 |
$content[] = $m[1]; |
| 1225 |
if ($nestingOpen) { |
| 1226 |
$nestingLevel += substr_count($m[1], $nestingOpen); |
| 1227 |
} |
| 1228 |
} |
| 1229 |
|
| 1230 |
$tok = $m[2]; |
| 1231 |
|
| 1232 |
$this->count-= strlen($tok); |
| 1233 |
if ($tok == $end) { |
| 1234 |
if ($nestingLevel == 0) { |
| 1235 |
break; |
| 1236 |
} else { |
| 1237 |
$nestingLevel--; |
| 1238 |
} |
| 1239 |
} |
| 1240 |
|
| 1241 |
if (($tok == '\'' || $tok == '"') && $this->string($str)) { |
| 1242 |
$content[] = $str; |
| 1243 |
continue; |
| 1244 |
} |
| 1245 |
|
| 1246 |
if ($tok == '#{' && $this->interpolation($inter)) { |
| 1247 |
$content[] = $inter; |
| 1248 |
continue; |
| 1249 |
} |
| 1250 |
|
| 1251 |
$content[] = $tok; |
| 1252 |
$this->count+= strlen($tok); |
| 1253 |
} |
| 1254 |
|
| 1255 |
$this->eatWhiteDefault = $oldWhite; |
| 1256 |
|
| 1257 |
if (count($content) == 0) { |
| 1258 |
return false; |
| 1259 |
} |
| 1260 |
|
| 1261 |
// trim the end |
| 1262 |
if (is_string(end($content))) { |
| 1263 |
$content[count($content) - 1] = rtrim(end($content)); |
| 1264 |
} |
| 1265 |
|
| 1266 |
$out = array('string', '', $content); |
| 1267 |
|
| 1268 |
return true; |
| 1269 |
} |
| 1270 |
|
| 1271 |
// $lookWhite: save information about whitespace before and after |
| 1272 |
protected function interpolation(&$out, $lookWhite = true) |
| 1273 |
{ |
| 1274 |
$oldWhite = $this->eatWhiteDefault; |
| 1275 |
$this->eatWhiteDefault = true; |
| 1276 |
|
| 1277 |
$s = $this->seek(); |
| 1278 |
if ($this->literal('#{') && $this->valueList($value) && $this->literal('}', false)) { |
| 1279 |
|
| 1280 |
// TODO: don't error if out of bounds |
| 1281 |
|
| 1282 |
if ($lookWhite) { |
| 1283 |
$left = preg_match('/\s/', $this->buffer[$s - 1]) ? ' ' : ''; |
| 1284 |
$right = preg_match('/\s/', $this->buffer[$this->count]) ? ' ': ''; |
| 1285 |
} else { |
| 1286 |
$left = $right = false; |
| 1287 |
} |
| 1288 |
|
| 1289 |
$out = array('interpolate', $value, $left, $right); |
| 1290 |
$this->eatWhiteDefault = $oldWhite; |
| 1291 |
if ($this->eatWhiteDefault) { |
| 1292 |
$this->whitespace(); |
| 1293 |
} |
| 1294 |
return true; |
| 1295 |
} |
| 1296 |
|
| 1297 |
$this->seek($s); |
| 1298 |
$this->eatWhiteDefault = $oldWhite; |
| 1299 |
return false; |
| 1300 |
} |
| 1301 |
|
| 1302 |
// low level parsers |
| 1303 |
|
| 1304 |
// returns an array of parts or a string |
| 1305 |
protected function propertyName(&$out) |
| 1306 |
{ |
| 1307 |
$s = $this->seek(); |
| 1308 |
$parts = array(); |
| 1309 |
|
| 1310 |
$oldWhite = $this->eatWhiteDefault; |
| 1311 |
$this->eatWhiteDefault = false; |
| 1312 |
|
| 1313 |
while (true) { |
| 1314 |
if ($this->interpolation($inter)) { |
| 1315 |
$parts[] = $inter; |
| 1316 |
} elseif ($this->keyword($text)) { |
| 1317 |
$parts[] = $text; |
| 1318 |
} elseif (count($parts) == 0 && $this->match('[:.#]', $m, false)) { |
| 1319 |
// css hacks |
| 1320 |
$parts[] = $m[0]; |
| 1321 |
} else { |
| 1322 |
break; |
| 1323 |
} |
| 1324 |
} |
| 1325 |
|
| 1326 |
$this->eatWhiteDefault = $oldWhite; |
| 1327 |
if (count($parts) == 0) { |
| 1328 |
return false; |
| 1329 |
} |
| 1330 |
|
| 1331 |
// match comment hack |
| 1332 |
if (preg_match( |
| 1333 |
self::$whitePattern, |
| 1334 |
$this->buffer, |
| 1335 |
$m, |
| 1336 |
null, |
| 1337 |
$this->count |
| 1338 |
)) { |
| 1339 |
if (!empty($m[0])) { |
| 1340 |
$parts[] = $m[0]; |
| 1341 |
$this->count += strlen($m[0]); |
| 1342 |
} |
| 1343 |
} |
| 1344 |
|
| 1345 |
$this->whitespace(); // get any extra whitespace |
| 1346 |
|
| 1347 |
$out = array('string', '', $parts); |
| 1348 |
|
| 1349 |
return true; |
| 1350 |
} |
| 1351 |
|
| 1352 |
// comma separated list of selectors |
| 1353 |
protected function selectors(&$out) |
| 1354 |
{ |
| 1355 |
$s = $this->seek(); |
| 1356 |
$selectors = array(); |
| 1357 |
|
| 1358 |
while ($this->selector($sel)) { |
| 1359 |
$selectors[] = $sel; |
| 1360 |
|
| 1361 |
if (!$this->literal(',')) { |
| 1362 |
break; |
| 1363 |
} |
| 1364 |
|
| 1365 |
while ($this->literal(',')) { |
| 1366 |
; // ignore extra |
| 1367 |
} |
| 1368 |
} |
| 1369 |
|
| 1370 |
if (count($selectors) == 0) { |
| 1371 |
$this->seek($s); |
| 1372 |
|
| 1373 |
return false; |
| 1374 |
} |
| 1375 |
|
| 1376 |
$out = $selectors; |
| 1377 |
|
| 1378 |
return true; |
| 1379 |
} |
| 1380 |
|
| 1381 |
// whitespace separated list of selectorSingle |
| 1382 |
protected function selector(&$out) |
| 1383 |
{ |
| 1384 |
$selector = array(); |
| 1385 |
|
| 1386 |
while (true) { |
| 1387 |
if ($this->match('[>+~]+', $m)) { |
| 1388 |
$selector[] = array($m[0]); |
| 1389 |
} elseif ($this->selectorSingle($part)) { |
| 1390 |
$selector[] = $part; |
| 1391 |
$this->match('\s+', $m); |
| 1392 |
} elseif ($this->match('\/[^\/]+\/', $m)) { |
| 1393 |
$selector[] = array($m[0]); |
| 1394 |
} else { |
| 1395 |
break; |
| 1396 |
} |
| 1397 |
|
| 1398 |
} |
| 1399 |
|
| 1400 |
if (count($selector) == 0) { |
| 1401 |
return false; |
| 1402 |
} |
| 1403 |
|
| 1404 |
$out = $selector; |
| 1405 |
return true; |
| 1406 |
} |
| 1407 |
|
| 1408 |
// the parts that make up |
| 1409 |
// div[yes=no]#something.hello.world:nth-child(-2n+1)%placeholder |
| 1410 |
protected function selectorSingle(&$out) |
| 1411 |
{ |
| 1412 |
$oldWhite = $this->eatWhiteDefault; |
| 1413 |
$this->eatWhiteDefault = false; |
| 1414 |
|
| 1415 |
$parts = array(); |
| 1416 |
|
| 1417 |
if ($this->literal('*', false)) { |
| 1418 |
$parts[] = '*'; |
| 1419 |
} |
| 1420 |
|
| 1421 |
while (true) { |
| 1422 |
// see if we can stop early |
| 1423 |
if ($this->match('\s*[{,]', $m)) { |
| 1424 |
$this->count--; |
| 1425 |
break; |
| 1426 |
} |
| 1427 |
|
| 1428 |
$s = $this->seek(); |
| 1429 |
// self |
| 1430 |
if ($this->literal('&', false)) { |
| 1431 |
$parts[] = Compiler::$selfSelector; |
| 1432 |
continue; |
| 1433 |
} |
| 1434 |
|
| 1435 |
if ($this->literal('.', false)) { |
| 1436 |
$parts[] = '.'; |
| 1437 |
continue; |
| 1438 |
} |
| 1439 |
|
| 1440 |
if ($this->literal('|', false)) { |
| 1441 |
$parts[] = '|'; |
| 1442 |
continue; |
| 1443 |
} |
| 1444 |
|
| 1445 |
if ($this->match('\\\\\S', $m)) { |
| 1446 |
$parts[] = $m[0]; |
| 1447 |
continue; |
| 1448 |
} |
| 1449 |
|
| 1450 |
// for keyframes |
| 1451 |
if ($this->unit($unit)) { |
| 1452 |
$parts[] = $unit; |
| 1453 |
continue; |
| 1454 |
} |
| 1455 |
|
| 1456 |
if ($this->keyword($name)) { |
| 1457 |
$parts[] = $name; |
| 1458 |
continue; |
| 1459 |
} |
| 1460 |
|
| 1461 |
if ($this->interpolation($inter)) { |
| 1462 |
$parts[] = $inter; |
| 1463 |
continue; |
| 1464 |
} |
| 1465 |
|
| 1466 |
if ($this->literal('%', false) && $this->placeholder($placeholder)) { |
| 1467 |
$parts[] = '%'; |
| 1468 |
$parts[] = $placeholder; |
| 1469 |
continue; |
| 1470 |
} |
| 1471 |
|
| 1472 |
if ($this->literal('#', false)) { |
| 1473 |
$parts[] = '#'; |
| 1474 |
continue; |
| 1475 |
} |
| 1476 |
|
| 1477 |
// a pseudo selector |
| 1478 |
if ($this->match('::?', $m) && $this->mixedKeyword($nameParts)) { |
| 1479 |
$parts[] = $m[0]; |
| 1480 |
foreach ($nameParts as $sub) { |
| 1481 |
$parts[] = $sub; |
| 1482 |
} |
| 1483 |
|
| 1484 |
$ss = $this->seek(); |
| 1485 |
|
| 1486 |
if ($this->literal('(') && |
| 1487 |
($this->openString(')', $str, '(') || true ) && |
| 1488 |
$this->literal(')') |
| 1489 |
) { |
| 1490 |
$parts[] = '('; |
| 1491 |
|
| 1492 |
if (!empty($str)) { |
| 1493 |
$parts[] = $str; |
| 1494 |
} |
| 1495 |
|
| 1496 |
$parts[] = ')'; |
| 1497 |
} else { |
| 1498 |
$this->seek($ss); |
| 1499 |
} |
| 1500 |
|
| 1501 |
continue; |
| 1502 |
} else { |
| 1503 |
$this->seek($s); |
| 1504 |
} |
| 1505 |
|
| 1506 |
// attribute selector |
| 1507 |
// TODO: replace with open string? |
| 1508 |
if ($this->literal('[', false)) { |
| 1509 |
$attrParts = array('['); |
| 1510 |
// keyword, string, operator |
| 1511 |
while (true) { |
| 1512 |
if ($this->literal(']', false)) { |
| 1513 |
$this->count--; |
| 1514 |
break; // get out early |
| 1515 |
} |
| 1516 |
|
| 1517 |
if ($this->match('\s+', $m)) { |
| 1518 |
$attrParts[] = ' '; |
| 1519 |
continue; |
| 1520 |
} |
| 1521 |
if ($this->string($str)) { |
| 1522 |
$attrParts[] = $str; |
| 1523 |
continue; |
| 1524 |
} |
| 1525 |
|
| 1526 |
if ($this->keyword($word)) { |
| 1527 |
$attrParts[] = $word; |
| 1528 |
continue; |
| 1529 |
} |
| 1530 |
|
| 1531 |
if ($this->interpolation($inter, false)) { |
| 1532 |
$attrParts[] = $inter; |
| 1533 |
continue; |
| 1534 |
} |
| 1535 |
|
| 1536 |
// operator, handles attr namespace too |
| 1537 |
if ($this->match('[|-~\$\*\^=]+', $m)) { |
| 1538 |
$attrParts[] = $m[0]; |
| 1539 |
continue; |
| 1540 |
} |
| 1541 |
|
| 1542 |
break; |
| 1543 |
} |
| 1544 |
|
| 1545 |
if ($this->literal(']', false)) { |
| 1546 |
$attrParts[] = ']'; |
| 1547 |
|
| 1548 |
foreach ($attrParts as $part) { |
| 1549 |
$parts[] = $part; |
| 1550 |
} |
| 1551 |
|
| 1552 |
continue; |
| 1553 |
} |
| 1554 |
|
| 1555 |
$this->seek($s); |
| 1556 |
// should just break here? |
| 1557 |
} |
| 1558 |
|
| 1559 |
break; |
| 1560 |
} |
| 1561 |
|
| 1562 |
$this->eatWhiteDefault = $oldWhite; |
| 1563 |
|
| 1564 |
if (count($parts) == 0) { |
| 1565 |
return false; |
| 1566 |
} |
| 1567 |
|
| 1568 |
$out = $parts; |
| 1569 |
|
| 1570 |
return true; |
| 1571 |
} |
| 1572 |
|
| 1573 |
protected function variable(&$out) |
| 1574 |
{ |
| 1575 |
$s = $this->seek(); |
| 1576 |
|
| 1577 |
if ($this->literal('$', false) && $this->keyword($name)) { |
| 1578 |
$out = array('var', $name); |
| 1579 |
|
| 1580 |
return true; |
| 1581 |
} |
| 1582 |
|
| 1583 |
$this->seek($s); |
| 1584 |
|
| 1585 |
return false; |
| 1586 |
} |
| 1587 |
|
| 1588 |
protected function keyword(&$word, $eatWhitespace = null) |
| 1589 |
{ |
| 1590 |
if ($this->match( |
| 1591 |
'(([\w_\-\*!"\']|[\\\\].)([\w\-_"\']|[\\\\].)*)', |
| 1592 |
$m, |
| 1593 |
$eatWhitespace |
| 1594 |
)) { |
| 1595 |
$word = $m[1]; |
| 1596 |
|
| 1597 |
return true; |
| 1598 |
} |
| 1599 |
|
| 1600 |
return false; |
| 1601 |
} |
| 1602 |
|
| 1603 |
protected function placeholder(&$placeholder) |
| 1604 |
{ |
| 1605 |
if ($this->match('([\w\-_]+)', $m)) { |
| 1606 |
$placeholder = $m[1]; |
| 1607 |
|
| 1608 |
return true; |
| 1609 |
} |
| 1610 |
|
| 1611 |
return false; |
| 1612 |
} |
| 1613 |
|
| 1614 |
// consume an end of statement delimiter |
| 1615 |
protected function end() |
| 1616 |
{ |
| 1617 |
if ($this->literal(';')) { |
| 1618 |
return true; |
| 1619 |
} |
| 1620 |
|
| 1621 |
if ($this->count == strlen($this->buffer) || $this->buffer[$this->count] == '}') { |
| 1622 |
// if there is end of file or a closing block next then we don't need a ; |
| 1623 |
return true; |
| 1624 |
} |
| 1625 |
|
| 1626 |
return false; |
| 1627 |
} |
| 1628 |
|
| 1629 |
// advance counter to next occurrence of $what |
| 1630 |
// $until - don't include $what in advance |
| 1631 |
// $allowNewline, if string, will be used as valid char set |
| 1632 |
protected function to($what, &$out, $until = false, $allowNewline = false) |
| 1633 |
{ |
| 1634 |
if (is_string($allowNewline)) { |
| 1635 |
$validChars = $allowNewline; |
| 1636 |
} else { |
| 1637 |
$validChars = $allowNewline ? '.' : "[^\n]"; |
| 1638 |
} |
| 1639 |
|
| 1640 |
if (!$this->match('('.$validChars.'*?)'.$this->pregQuote($what), $m, !$until)) { |
| 1641 |
return false; |
| 1642 |
} |
| 1643 |
|
| 1644 |
if ($until) { |
| 1645 |
$this->count -= strlen($what); // give back $what |
| 1646 |
} |
| 1647 |
|
| 1648 |
$out = $m[1]; |
| 1649 |
|
| 1650 |
return true; |
| 1651 |
} |
| 1652 |
|
| 1653 |
public function throwParseError($msg = 'parse error', $count = null) |
| 1654 |
{ |
| 1655 |
$count = !isset($count) ? $this->count : $count; |
| 1656 |
|
| 1657 |
$line = $this->getLineNo($count); |
| 1658 |
|
| 1659 |
if (!empty($this->sourceName)) { |
| 1660 |
$loc = "$this->sourceName on line $line"; |
| 1661 |
} else { |
| 1662 |
$loc = "line: $line"; |
| 1663 |
} |
| 1664 |
|
| 1665 |
if ($this->peek("(.*?)(\n|$)", $m, $count)) { |
| 1666 |
throw new \Exception("$msg: failed at `$m[1]` $loc"); |
| 1667 |
} |
| 1668 |
|
| 1669 |
throw new \Exception("$msg: $loc"); |
| 1670 |
} |
| 1671 |
|
| 1672 |
public function getLineNo($pos) |
| 1673 |
{ |
| 1674 |
return 1 + substr_count(substr($this->buffer, 0, $pos), "\n"); |
| 1675 |
} |
| 1676 |
|
| 1677 |
/** |
| 1678 |
* Match string looking for either ending delim, escape, or string interpolation |
| 1679 |
* |
| 1680 |
* {@internal This is a workaround for preg_match's 250K string match limit. }} |
| 1681 |
* |
| 1682 |
* @param array $m Matches (passed by reference) |
| 1683 |
* @param string $delim Delimeter |
| 1684 |
* |
| 1685 |
* @return boolean True if match; false otherwise |
| 1686 |
*/ |
| 1687 |
protected function matchString(&$m, $delim) |
| 1688 |
{ |
| 1689 |
$token = null; |
| 1690 |
|
| 1691 |
$end = strpos($this->buffer, "\n", $this->count); |
| 1692 |
|
| 1693 |
if ($end === false || |
| 1694 |
$this->buffer[$end - 1] == '\\' || |
| 1695 |
$this->buffer[$end - 2] == '\\' && $this->buffer[$end - 1] == "\r" |
| 1696 |
) { |
| 1697 |
$end = strlen($this->buffer); |
| 1698 |
} |
| 1699 |
|
| 1700 |
// look for either ending delim, escape, or string interpolation |
| 1701 |
foreach (array('#{', '\\', $delim) as $lookahead) { |
| 1702 |
$pos = strpos($this->buffer, $lookahead, $this->count); |
| 1703 |
|
| 1704 |
if ($pos !== false && $pos < $end) { |
| 1705 |
$end = $pos; |
| 1706 |
$token = $lookahead; |
| 1707 |
} |
| 1708 |
} |
| 1709 |
|
| 1710 |
if (!isset($token)) { |
| 1711 |
return false; |
| 1712 |
} |
| 1713 |
|
| 1714 |
$match = substr($this->buffer, $this->count, $end - $this->count); |
| 1715 |
$m = array( |
| 1716 |
$match . $token, |
| 1717 |
$match, |
| 1718 |
$token |
| 1719 |
); |
| 1720 |
$this->count = $end + strlen($token); |
| 1721 |
|
| 1722 |
return true; |
| 1723 |
} |
| 1724 |
|
| 1725 |
// try to match something on head of buffer |
| 1726 |
protected function match($regex, &$out, $eatWhitespace = null) |
| 1727 |
{ |
| 1728 |
if (!isset($eatWhitespace)) { |
| 1729 |
$eatWhitespace = $this->eatWhiteDefault; |
| 1730 |
} |
| 1731 |
|
| 1732 |
$r = '/'.$regex.'/Ais'; |
| 1733 |
|
| 1734 |
if (preg_match($r, $this->buffer, $out, null, $this->count)) { |
| 1735 |
$this->count += strlen($out[0]); |
| 1736 |
|
| 1737 |
if ($eatWhitespace) { |
| 1738 |
$this->whitespace(); |
| 1739 |
} |
| 1740 |
|
| 1741 |
return true; |
| 1742 |
} |
| 1743 |
|
| 1744 |
return false; |
| 1745 |
} |
| 1746 |
|
| 1747 |
// match some whitespace |
| 1748 |
protected function whitespace() |
| 1749 |
{ |
| 1750 |
$gotWhite = false; |
| 1751 |
|
| 1752 |
while (preg_match(self::$whitePattern, $this->buffer, $m, null, $this->count)) { |
| 1753 |
if (isset($m[1]) && empty($this->commentsSeen[$this->count])) { |
| 1754 |
$this->appendComment(array('comment', $m[1])); |
| 1755 |
$this->commentsSeen[$this->count] = true; |
| 1756 |
} |
| 1757 |
|
| 1758 |
$this->count += strlen($m[0]); |
| 1759 |
$gotWhite = true; |
| 1760 |
} |
| 1761 |
|
| 1762 |
return $gotWhite; |
| 1763 |
} |
| 1764 |
|
| 1765 |
protected function peek($regex, &$out, $from = null) |
| 1766 |
{ |
| 1767 |
if (!isset($from)) { |
| 1768 |
$from = $this->count; |
| 1769 |
} |
| 1770 |
|
| 1771 |
$r = '/'.$regex.'/Ais'; |
| 1772 |
$result = preg_match($r, $this->buffer, $out, null, $from); |
| 1773 |
|
| 1774 |
return $result; |
| 1775 |
} |
| 1776 |
|
| 1777 |
protected function seek($where = null) |
| 1778 |
{ |
| 1779 |
if ($where === null) { |
| 1780 |
return $this->count; |
| 1781 |
} |
| 1782 |
|
| 1783 |
$this->count = $where; |
| 1784 |
|
| 1785 |
return true; |
| 1786 |
} |
| 1787 |
|
| 1788 |
public static function pregQuote($what) |
| 1789 |
{ |
| 1790 |
return preg_quote($what, '/'); |
| 1791 |
} |
| 1792 |
|
| 1793 |
protected function show() |
| 1794 |
{ |
| 1795 |
if ($this->peek("(.*?)(\n|$)", $m, $this->count)) { |
| 1796 |
return $m[1]; |
| 1797 |
} |
| 1798 |
|
| 1799 |
return ''; |
| 1800 |
} |
| 1801 |
|
| 1802 |
// turn list of length 1 into value type |
| 1803 |
protected function flattenList($value) |
| 1804 |
{ |
| 1805 |
if ($value[0] == 'list' && count($value[2]) == 1) { |
| 1806 |
return $this->flattenList($value[2][0]); |
| 1807 |
} |
| 1808 |
|
| 1809 |
return $value; |
| 1810 |
} |
| 1811 |
} |
| 1812 |
|
