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lessc.inc.php
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plessc
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lessc.inc.php
3769 lines
| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * lessphp v0.5.0 |
| 5 | * http://leafo.net/lessphp |
| 6 | * |
| 7 | * LESS CSS compiler, adapted from http://lesscss.org |
| 8 | * |
| 9 | * Copyright 2013, Leaf Corcoran <leafot@gmail.com> |
| 10 | * Licensed under MIT or GPLv3, see LICENSE |
| 11 | */ |
| 12 | |
| 13 | |
| 14 | /** |
| 15 | * The LESS compiler and parser. |
| 16 | * |
| 17 | * Converting LESS to CSS is a three stage process. The incoming file is parsed |
| 18 | * by `lessc_parser` into a syntax tree, then it is compiled into another tree |
| 19 | * representing the CSS structure by `lessc`. The CSS tree is fed into a |
| 20 | * formatter, like `lessc_formatter` which then outputs CSS as a string. |
| 21 | * |
| 22 | * During the first compile, all values are *reduced*, which means that their |
| 23 | * types are brought to the lowest form before being dump as strings. This |
| 24 | * handles math equations, variable dereferences, and the like. |
| 25 | * |
| 26 | * The `parse` function of `lessc` is the entry point. |
| 27 | * |
| 28 | * In summary: |
| 29 | * |
| 30 | * The `lessc` class creates an instance of the parser, feeds it LESS code, |
| 31 | * then transforms the resulting tree to a CSS tree. This class also holds the |
| 32 | * evaluation context, such as all available mixins and variables at any given |
| 33 | * time. |
| 34 | * |
| 35 | * The `lessc_parser` class is only concerned with parsing its input. |
| 36 | * |
| 37 | * The `lessc_formatter` takes a CSS tree, and dumps it to a formatted string, |
| 38 | * handling things like indentation. |
| 39 | */ |
| 40 | class lessc { |
| 41 | static public $VERSION = "v0.5.0"; |
| 42 | |
| 43 | static public $TRUE = array("keyword", "true"); |
| 44 | static public $FALSE = array("keyword", "false"); |
| 45 | |
| 46 | protected $libFunctions = array(); |
| 47 | protected $registeredVars = array(); |
| 48 | protected $preserveComments = false; |
| 49 | |
| 50 | public $vPrefix = '@'; // prefix of abstract properties |
| 51 | public $mPrefix = '$'; // prefix of abstract blocks |
| 52 | public $parentSelector = '&'; |
| 53 | |
| 54 | public $importDisabled = false; |
| 55 | public $importDir = ''; |
| 56 | |
| 57 | protected $numberPrecision = null; |
| 58 | |
| 59 | protected $allParsedFiles = array(); |
| 60 | |
| 61 | // set to the parser that generated the current line when compiling |
| 62 | // so we know how to create error messages |
| 63 | protected $sourceParser = null; |
| 64 | protected $sourceLoc = null; |
| 65 | |
| 66 | static protected $nextImportId = 0; // uniquely identify imports |
| 67 | |
| 68 | // attempts to find the path of an import url, returns null for css files |
| 69 | protected function findImport($url) { |
| 70 | foreach ((array)$this->importDir as $dir) { |
| 71 | $full = $dir.(substr($dir, -1) != '/' ? '/' : '').$url; |
| 72 | if ($this->fileExists($file = $full.'.less') || $this->fileExists($file = $full)) { |
| 73 | return $file; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | return null; |
| 78 | } |
| 79 | |
| 80 | protected function fileExists($name) { |
| 81 | return is_file($name); |
| 82 | } |
| 83 | |
| 84 | static public function compressList($items, $delim) { |
| 85 | if (!isset($items[1]) && isset($items[0])) return $items[0]; |
| 86 | else return array('list', $delim, $items); |
| 87 | } |
| 88 | |
| 89 | static public function preg_quote($what) { |
| 90 | return preg_quote($what, '/'); |
| 91 | } |
| 92 | |
| 93 | protected function tryImport($importPath, $parentBlock, $out) { |
| 94 | if ($importPath[0] == "function" && $importPath[1] == "url") { |
| 95 | $importPath = $this->flattenList($importPath[2]); |
| 96 | } |
| 97 | |
| 98 | $str = $this->coerceString($importPath); |
| 99 | if ($str === null) return false; |
| 100 | |
| 101 | $url = $this->compileValue($this->lib_e($str)); |
| 102 | |
| 103 | // don't import if it ends in css |
| 104 | if (substr_compare($url, '.css', -4, 4) === 0) return false; |
| 105 | |
| 106 | $realPath = $this->findImport($url); |
| 107 | |
| 108 | if ($realPath === null) return false; |
| 109 | |
| 110 | if ($this->importDisabled) { |
| 111 | return array(false, "/* import disabled */"); |
| 112 | } |
| 113 | |
| 114 | if (isset($this->allParsedFiles[realpath($realPath)])) { |
| 115 | return array(false, null); |
| 116 | } |
| 117 | |
| 118 | $this->addParsedFile($realPath); |
| 119 | $parser = $this->makeParser($realPath); |
| 120 | $root = $parser->parse(file_get_contents($realPath)); |
| 121 | |
| 122 | // set the parents of all the block props |
| 123 | foreach ($root->props as $prop) { |
| 124 | if ($prop[0] == "block") { |
| 125 | $prop[1]->parent = $parentBlock; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | // copy mixins into scope, set their parents |
| 130 | // bring blocks from import into current block |
| 131 | // TODO: need to mark the source parser these came from this file |
| 132 | foreach ($root->children as $childName => $child) { |
| 133 | if (isset($parentBlock->children[$childName])) { |
| 134 | $parentBlock->children[$childName] = array_merge( |
| 135 | $parentBlock->children[$childName], |
| 136 | $child); |
| 137 | } else { |
| 138 | $parentBlock->children[$childName] = $child; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | $pi = pathinfo($realPath); |
| 143 | $dir = $pi["dirname"]; |
| 144 | |
| 145 | list($top, $bottom) = $this->sortProps($root->props, true); |
| 146 | $this->compileImportedProps($top, $parentBlock, $out, $parser, $dir); |
| 147 | |
| 148 | return array(true, $bottom, $parser, $dir); |
| 149 | } |
| 150 | |
| 151 | protected function compileImportedProps($props, $block, $out, $sourceParser, $importDir) { |
| 152 | $oldSourceParser = $this->sourceParser; |
| 153 | |
| 154 | $oldImport = $this->importDir; |
| 155 | |
| 156 | // TODO: this is because the importDir api is stupid |
| 157 | $this->importDir = (array)$this->importDir; |
| 158 | array_unshift($this->importDir, $importDir); |
| 159 | |
| 160 | foreach ($props as $prop) { |
| 161 | $this->compileProp($prop, $block, $out); |
| 162 | } |
| 163 | |
| 164 | $this->importDir = $oldImport; |
| 165 | $this->sourceParser = $oldSourceParser; |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Recursively compiles a block. |
| 170 | * |
| 171 | * A block is analogous to a CSS block in most cases. A single LESS document |
| 172 | * is encapsulated in a block when parsed, but it does not have parent tags |
| 173 | * so all of it's children appear on the root level when compiled. |
| 174 | * |
| 175 | * Blocks are made up of props and children. |
| 176 | * |
| 177 | * Props are property instructions, array tuples which describe an action |
| 178 | * to be taken, eg. write a property, set a variable, mixin a block. |
| 179 | * |
| 180 | * The children of a block are just all the blocks that are defined within. |
| 181 | * This is used to look up mixins when performing a mixin. |
| 182 | * |
| 183 | * Compiling the block involves pushing a fresh environment on the stack, |
| 184 | * and iterating through the props, compiling each one. |
| 185 | * |
| 186 | * See lessc::compileProp() |
| 187 | * |
| 188 | */ |
| 189 | protected function compileBlock($block) { |
| 190 | switch ($block->type) { |
| 191 | case "root": |
| 192 | $this->compileRoot($block); |
| 193 | break; |
| 194 | case null: |
| 195 | $this->compileCSSBlock($block); |
| 196 | break; |
| 197 | case "media": |
| 198 | $this->compileMedia($block); |
| 199 | break; |
| 200 | case "directive": |
| 201 | $name = "@" . $block->name; |
| 202 | if (!empty($block->value)) { |
| 203 | $name .= " " . $this->compileValue($this->reduce($block->value)); |
| 204 | } |
| 205 | |
| 206 | $this->compileNestedBlock($block, array($name)); |
| 207 | break; |
| 208 | default: |
| 209 | $this->throwError("unknown block type: $block->type\n"); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | protected function compileCSSBlock($block) { |
| 214 | $env = $this->pushEnv(); |
| 215 | |
| 216 | $selectors = $this->compileSelectors($block->tags); |
| 217 | $env->selectors = $this->multiplySelectors($selectors); |
| 218 | $out = $this->makeOutputBlock(null, $env->selectors); |
| 219 | |
| 220 | $this->scope->children[] = $out; |
| 221 | $this->compileProps($block, $out); |
| 222 | |
| 223 | $block->scope = $env; // mixins carry scope with them! |
| 224 | $this->popEnv(); |
| 225 | } |
| 226 | |
| 227 | protected function compileMedia($media) { |
| 228 | $env = $this->pushEnv($media); |
| 229 | $parentScope = $this->mediaParent($this->scope); |
| 230 | |
| 231 | $query = $this->compileMediaQuery($this->multiplyMedia($env)); |
| 232 | |
| 233 | $this->scope = $this->makeOutputBlock($media->type, array($query)); |
| 234 | $parentScope->children[] = $this->scope; |
| 235 | |
| 236 | $this->compileProps($media, $this->scope); |
| 237 | |
| 238 | if (count($this->scope->lines) > 0) { |
| 239 | $orphanSelelectors = $this->findClosestSelectors(); |
| 240 | if (!is_null($orphanSelelectors)) { |
| 241 | $orphan = $this->makeOutputBlock(null, $orphanSelelectors); |
| 242 | $orphan->lines = $this->scope->lines; |
| 243 | array_unshift($this->scope->children, $orphan); |
| 244 | $this->scope->lines = array(); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | $this->scope = $this->scope->parent; |
| 249 | $this->popEnv(); |
| 250 | } |
| 251 | |
| 252 | protected function mediaParent($scope) { |
| 253 | while (!empty($scope->parent)) { |
| 254 | if (!empty($scope->type) && $scope->type != "media") { |
| 255 | break; |
| 256 | } |
| 257 | $scope = $scope->parent; |
| 258 | } |
| 259 | |
| 260 | return $scope; |
| 261 | } |
| 262 | |
| 263 | protected function compileNestedBlock($block, $selectors) { |
| 264 | $this->pushEnv($block); |
| 265 | $this->scope = $this->makeOutputBlock($block->type, $selectors); |
| 266 | $this->scope->parent->children[] = $this->scope; |
| 267 | |
| 268 | $this->compileProps($block, $this->scope); |
| 269 | |
| 270 | $this->scope = $this->scope->parent; |
| 271 | $this->popEnv(); |
| 272 | } |
| 273 | |
| 274 | protected function compileRoot($root) { |
| 275 | $this->pushEnv(); |
| 276 | $this->scope = $this->makeOutputBlock($root->type); |
| 277 | $this->compileProps($root, $this->scope); |
| 278 | $this->popEnv(); |
| 279 | } |
| 280 | |
| 281 | protected function compileProps($block, $out) { |
| 282 | foreach ($this->sortProps($block->props) as $prop) { |
| 283 | $this->compileProp($prop, $block, $out); |
| 284 | } |
| 285 | $out->lines = $this->deduplicate($out->lines); |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * Deduplicate lines in a block. Comments are not deduplicated. If a |
| 290 | * duplicate rule is detected, the comments immediately preceding each |
| 291 | * occurence are consolidated. |
| 292 | */ |
| 293 | protected function deduplicate($lines) { |
| 294 | $unique = array(); |
| 295 | $comments = array(); |
| 296 | |
| 297 | foreach($lines as $line) { |
| 298 | if (strpos($line, '/*') === 0) { |
| 299 | $comments[] = $line; |
| 300 | continue; |
| 301 | } |
| 302 | if (!in_array($line, $unique)) { |
| 303 | $unique[] = $line; |
| 304 | } |
| 305 | array_splice($unique, array_search($line, $unique), 0, $comments); |
| 306 | $comments = array(); |
| 307 | } |
| 308 | return array_merge($unique, $comments); |
| 309 | } |
| 310 | |
| 311 | protected function sortProps($props, $split = false) { |
| 312 | $vars = array(); |
| 313 | $imports = array(); |
| 314 | $other = array(); |
| 315 | $stack = array(); |
| 316 | |
| 317 | foreach ($props as $prop) { |
| 318 | switch ($prop[0]) { |
| 319 | case "comment": |
| 320 | $stack[] = $prop; |
| 321 | break; |
| 322 | case "assign": |
| 323 | $stack[] = $prop; |
| 324 | if (isset($prop[1][0]) && $prop[1][0] == $this->vPrefix) { |
| 325 | $vars = array_merge($vars, $stack); |
| 326 | } else { |
| 327 | $other = array_merge($other, $stack); |
| 328 | } |
| 329 | $stack = array(); |
| 330 | break; |
| 331 | case "import": |
| 332 | $id = self::$nextImportId++; |
| 333 | $prop[] = $id; |
| 334 | $stack[] = $prop; |
| 335 | $imports = array_merge($imports, $stack); |
| 336 | $other[] = array("import_mixin", $id); |
| 337 | $stack = array(); |
| 338 | break; |
| 339 | default: |
| 340 | $stack[] = $prop; |
| 341 | $other = array_merge($other, $stack); |
| 342 | $stack = array(); |
| 343 | break; |
| 344 | } |
| 345 | } |
| 346 | $other = array_merge($other, $stack); |
| 347 | |
| 348 | if ($split) { |
| 349 | return array(array_merge($imports, $vars), $other); |
| 350 | } else { |
| 351 | return array_merge($imports, $vars, $other); |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | protected function compileMediaQuery($queries) { |
| 356 | $compiledQueries = array(); |
| 357 | foreach ($queries as $query) { |
| 358 | $parts = array(); |
| 359 | foreach ($query as $q) { |
| 360 | switch ($q[0]) { |
| 361 | case "mediaType": |
| 362 | $parts[] = implode(" ", array_slice($q, 1)); |
| 363 | break; |
| 364 | case "mediaExp": |
| 365 | if (isset($q[2])) { |
| 366 | $parts[] = "($q[1]: " . |
| 367 | $this->compileValue($this->reduce($q[2])) . ")"; |
| 368 | } else { |
| 369 | $parts[] = "($q[1])"; |
| 370 | } |
| 371 | break; |
| 372 | case "variable": |
| 373 | $parts[] = $this->compileValue($this->reduce($q)); |
| 374 | break; |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | if (count($parts) > 0) { |
| 379 | $compiledQueries[] = implode(" and ", $parts); |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | $out = "@media"; |
| 384 | if (!empty($parts)) { |
| 385 | $out .= " " . |
| 386 | implode($this->formatter->selectorSeparator, $compiledQueries); |
| 387 | } |
| 388 | return $out; |
| 389 | } |
| 390 | |
| 391 | protected function multiplyMedia($env, $childQueries = null) { |
| 392 | if (is_null($env) || |
| 393 | !empty($env->block->type) && $env->block->type != "media") |
| 394 | { |
| 395 | return $childQueries; |
| 396 | } |
| 397 | |
| 398 | // plain old block, skip |
| 399 | if (empty($env->block->type)) { |
| 400 | return $this->multiplyMedia($env->parent, $childQueries); |
| 401 | } |
| 402 | |
| 403 | $out = array(); |
| 404 | $queries = $env->block->queries; |
| 405 | if (is_null($childQueries)) { |
| 406 | $out = $queries; |
| 407 | } else { |
| 408 | foreach ($queries as $parent) { |
| 409 | foreach ($childQueries as $child) { |
| 410 | $out[] = array_merge($parent, $child); |
| 411 | } |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | return $this->multiplyMedia($env->parent, $out); |
| 416 | } |
| 417 | |
| 418 | protected function expandParentSelectors(&$tag, $replace) { |
| 419 | $parts = explode("$&$", $tag); |
| 420 | $count = 0; |
| 421 | foreach ($parts as &$part) { |
| 422 | $part = str_replace($this->parentSelector, $replace, $part, $c); |
| 423 | $count += $c; |
| 424 | } |
| 425 | $tag = implode($this->parentSelector, $parts); |
| 426 | return $count; |
| 427 | } |
| 428 | |
| 429 | protected function findClosestSelectors() { |
| 430 | $env = $this->env; |
| 431 | $selectors = null; |
| 432 | while ($env !== null) { |
| 433 | if (isset($env->selectors)) { |
| 434 | $selectors = $env->selectors; |
| 435 | break; |
| 436 | } |
| 437 | $env = $env->parent; |
| 438 | } |
| 439 | |
| 440 | return $selectors; |
| 441 | } |
| 442 | |
| 443 | |
| 444 | // multiply $selectors against the nearest selectors in env |
| 445 | protected function multiplySelectors($selectors) { |
| 446 | // find parent selectors |
| 447 | |
| 448 | $parentSelectors = $this->findClosestSelectors(); |
| 449 | if (is_null($parentSelectors)) { |
| 450 | // kill parent reference in top level selector |
| 451 | foreach ($selectors as &$s) { |
| 452 | $this->expandParentSelectors($s, ""); |
| 453 | } |
| 454 | |
| 455 | return $selectors; |
| 456 | } |
| 457 | |
| 458 | $out = array(); |
| 459 | foreach ($parentSelectors as $parent) { |
| 460 | foreach ($selectors as $child) { |
| 461 | $count = $this->expandParentSelectors($child, $parent); |
| 462 | |
| 463 | // don't prepend the parent tag if & was used |
| 464 | if ($count > 0) { |
| 465 | $out[] = trim($child); |
| 466 | } else { |
| 467 | $out[] = trim($parent . ' ' . $child); |
| 468 | } |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | return $out; |
| 473 | } |
| 474 | |
| 475 | // reduces selector expressions |
| 476 | protected function compileSelectors($selectors) { |
| 477 | $out = array(); |
| 478 | |
| 479 | foreach ($selectors as $s) { |
| 480 | if (is_array($s)) { |
| 481 | list(, $value) = $s; |
| 482 | $out[] = trim($this->compileValue($this->reduce($value))); |
| 483 | } else { |
| 484 | $out[] = $s; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | return $out; |
| 489 | } |
| 490 | |
| 491 | protected function eq($left, $right) { |
| 492 | return $left == $right; |
| 493 | } |
| 494 | |
| 495 | protected function patternMatch($block, $orderedArgs, $keywordArgs) { |
| 496 | // match the guards if it has them |
| 497 | // any one of the groups must have all its guards pass for a match |
| 498 | if (!empty($block->guards)) { |
| 499 | $groupPassed = false; |
| 500 | foreach ($block->guards as $guardGroup) { |
| 501 | foreach ($guardGroup as $guard) { |
| 502 | $this->pushEnv(); |
| 503 | $this->zipSetArgs($block->args, $orderedArgs, $keywordArgs); |
| 504 | |
| 505 | $negate = false; |
| 506 | if ($guard[0] == "negate") { |
| 507 | $guard = $guard[1]; |
| 508 | $negate = true; |
| 509 | } |
| 510 | |
| 511 | $passed = $this->reduce($guard) == self::$TRUE; |
| 512 | if ($negate) $passed = !$passed; |
| 513 | |
| 514 | $this->popEnv(); |
| 515 | |
| 516 | if ($passed) { |
| 517 | $groupPassed = true; |
| 518 | } else { |
| 519 | $groupPassed = false; |
| 520 | break; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | if ($groupPassed) break; |
| 525 | } |
| 526 | |
| 527 | if (!$groupPassed) { |
| 528 | return false; |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | if (empty($block->args)) { |
| 533 | return $block->isVararg || empty($orderedArgs) && empty($keywordArgs); |
| 534 | } |
| 535 | |
| 536 | $remainingArgs = $block->args; |
| 537 | if ($keywordArgs) { |
| 538 | $remainingArgs = array(); |
| 539 | foreach ($block->args as $arg) { |
| 540 | if ($arg[0] == "arg" && isset($keywordArgs[$arg[1]])) { |
| 541 | continue; |
| 542 | } |
| 543 | |
| 544 | $remainingArgs[] = $arg; |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | $i = -1; // no args |
| 549 | // try to match by arity or by argument literal |
| 550 | foreach ($remainingArgs as $i => $arg) { |
| 551 | switch ($arg[0]) { |
| 552 | case "lit": |
| 553 | if (empty($orderedArgs[$i]) || !$this->eq($arg[1], $orderedArgs[$i])) { |
| 554 | return false; |
| 555 | } |
| 556 | break; |
| 557 | case "arg": |
| 558 | // no arg and no default value |
| 559 | if (!isset($orderedArgs[$i]) && !isset($arg[2])) { |
| 560 | return false; |
| 561 | } |
| 562 | break; |
| 563 | case "rest": |
| 564 | $i--; // rest can be empty |
| 565 | break 2; |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | if ($block->isVararg) { |
| 570 | return true; // not having enough is handled above |
| 571 | } else { |
| 572 | $numMatched = $i + 1; |
| 573 | // greater than becuase default values always match |
| 574 | return $numMatched >= count($orderedArgs); |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | protected function patternMatchAll($blocks, $orderedArgs, $keywordArgs, $skip=array()) { |
| 579 | $matches = null; |
| 580 | foreach ($blocks as $block) { |
| 581 | // skip seen blocks that don't have arguments |
| 582 | if (isset($skip[$block->id]) && !isset($block->args)) { |
| 583 | continue; |
| 584 | } |
| 585 | |
| 586 | if ($this->patternMatch($block, $orderedArgs, $keywordArgs)) { |
| 587 | $matches[] = $block; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | return $matches; |
| 592 | } |
| 593 | |
| 594 | // attempt to find blocks matched by path and args |
| 595 | protected function findBlocks($searchIn, $path, $orderedArgs, $keywordArgs, $seen=array()) { |
| 596 | if ($searchIn == null) return null; |
| 597 | if (isset($seen[$searchIn->id])) return null; |
| 598 | $seen[$searchIn->id] = true; |
| 599 | |
| 600 | $name = $path[0]; |
| 601 | |
| 602 | if (isset($searchIn->children[$name])) { |
| 603 | $blocks = $searchIn->children[$name]; |
| 604 | if (count($path) == 1) { |
| 605 | $matches = $this->patternMatchAll($blocks, $orderedArgs, $keywordArgs, $seen); |
| 606 | if (!empty($matches)) { |
| 607 | // This will return all blocks that match in the closest |
| 608 | // scope that has any matching block, like lessjs |
| 609 | return $matches; |
| 610 | } |
| 611 | } else { |
| 612 | $matches = array(); |
| 613 | foreach ($blocks as $subBlock) { |
| 614 | $subMatches = $this->findBlocks($subBlock, |
| 615 | array_slice($path, 1), $orderedArgs, $keywordArgs, $seen); |
| 616 | |
| 617 | if (!is_null($subMatches)) { |
| 618 | foreach ($subMatches as $sm) { |
| 619 | $matches[] = $sm; |
| 620 | } |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | return count($matches) > 0 ? $matches : null; |
| 625 | } |
| 626 | } |
| 627 | if ($searchIn->parent === $searchIn) return null; |
| 628 | return $this->findBlocks($searchIn->parent, $path, $orderedArgs, $keywordArgs, $seen); |
| 629 | } |
| 630 | |
| 631 | // sets all argument names in $args to either the default value |
| 632 | // or the one passed in through $values |
| 633 | protected function zipSetArgs($args, $orderedValues, $keywordValues) { |
| 634 | $assignedValues = array(); |
| 635 | |
| 636 | $i = 0; |
| 637 | foreach ($args as $a) { |
| 638 | if ($a[0] == "arg") { |
| 639 | if (isset($keywordValues[$a[1]])) { |
| 640 | // has keyword arg |
| 641 | $value = $keywordValues[$a[1]]; |
| 642 | } elseif (isset($orderedValues[$i])) { |
| 643 | // has ordered arg |
| 644 | $value = $orderedValues[$i]; |
| 645 | $i++; |
| 646 | } elseif (isset($a[2])) { |
| 647 | // has default value |
| 648 | $value = $a[2]; |
| 649 | } else { |
| 650 | $this->throwError("Failed to assign arg " . $a[1]); |
| 651 | $value = null; // :( |
| 652 | } |
| 653 | |
| 654 | $value = $this->reduce($value); |
| 655 | $this->set($a[1], $value); |
| 656 | $assignedValues[] = $value; |
| 657 | } else { |
| 658 | // a lit |
| 659 | $i++; |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | // check for a rest |
| 664 | $last = end($args); |
| 665 | if ($last[0] == "rest") { |
| 666 | $rest = array_slice($orderedValues, count($args) - 1); |
| 667 | $this->set($last[1], $this->reduce(array("list", " ", $rest))); |
| 668 | } |
| 669 | |
| 670 | // wow is this the only true use of PHP's + operator for arrays? |
| 671 | $this->env->arguments = $assignedValues + $orderedValues; |
| 672 | } |
| 673 | |
| 674 | // compile a prop and update $lines or $blocks appropriately |
| 675 | protected function compileProp($prop, $block, $out) { |
| 676 | // set error position context |
| 677 | $this->sourceLoc = isset($prop[-1]) ? $prop[-1] : -1; |
| 678 | |
| 679 | switch ($prop[0]) { |
| 680 | case 'assign': |
| 681 | list(, $name, $value) = $prop; |
| 682 | if ($name[0] == $this->vPrefix) { |
| 683 | $this->set($name, $value); |
| 684 | } else { |
| 685 | $out->lines[] = $this->formatter->property($name, |
| 686 | $this->compileValue($this->reduce($value))); |
| 687 | } |
| 688 | break; |
| 689 | case 'block': |
| 690 | list(, $child) = $prop; |
| 691 | $this->compileBlock($child); |
| 692 | break; |
| 693 | case 'mixin': |
| 694 | list(, $path, $args, $suffix) = $prop; |
| 695 | |
| 696 | $orderedArgs = array(); |
| 697 | $keywordArgs = array(); |
| 698 | foreach ((array)$args as $arg) { |
| 699 | $argval = null; |
| 700 | switch ($arg[0]) { |
| 701 | case "arg": |
| 702 | if (!isset($arg[2])) { |
| 703 | $orderedArgs[] = $this->reduce(array("variable", $arg[1])); |
| 704 | } else { |
| 705 | $keywordArgs[$arg[1]] = $this->reduce($arg[2]); |
| 706 | } |
| 707 | break; |
| 708 | |
| 709 | case "lit": |
| 710 | $orderedArgs[] = $this->reduce($arg[1]); |
| 711 | break; |
| 712 | default: |
| 713 | $this->throwError("Unknown arg type: " . $arg[0]); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | $mixins = $this->findBlocks($block, $path, $orderedArgs, $keywordArgs); |
| 718 | |
| 719 | if ($mixins === null) { |
| 720 | $this->throwError("{$prop[1][0]} is undefined"); |
| 721 | } |
| 722 | |
| 723 | foreach ($mixins as $mixin) { |
| 724 | if ($mixin === $block && !$orderedArgs) { |
| 725 | continue; |
| 726 | } |
| 727 | |
| 728 | $haveScope = false; |
| 729 | if (isset($mixin->parent->scope)) { |
| 730 | $haveScope = true; |
| 731 | $mixinParentEnv = $this->pushEnv(); |
| 732 | $mixinParentEnv->storeParent = $mixin->parent->scope; |
| 733 | } |
| 734 | |
| 735 | $haveArgs = false; |
| 736 | if (isset($mixin->args)) { |
| 737 | $haveArgs = true; |
| 738 | $this->pushEnv(); |
| 739 | $this->zipSetArgs($mixin->args, $orderedArgs, $keywordArgs); |
| 740 | } |
| 741 | |
| 742 | $oldParent = $mixin->parent; |
| 743 | if ($mixin != $block) $mixin->parent = $block; |
| 744 | |
| 745 | foreach ($this->sortProps($mixin->props) as $subProp) { |
| 746 | if ($suffix !== null && |
| 747 | $subProp[0] == "assign" && |
| 748 | is_string($subProp[1]) && |
| 749 | $subProp[1][0] != $this->vPrefix) |
| 750 | { |
| 751 | $subProp[2] = array( |
| 752 | 'list', ' ', |
| 753 | array($subProp[2], array('keyword', $suffix)) |
| 754 | ); |
| 755 | } |
| 756 | |
| 757 | $this->compileProp($subProp, $mixin, $out); |
| 758 | } |
| 759 | |
| 760 | $mixin->parent = $oldParent; |
| 761 | |
| 762 | if ($haveArgs) $this->popEnv(); |
| 763 | if ($haveScope) $this->popEnv(); |
| 764 | } |
| 765 | |
| 766 | break; |
| 767 | case 'raw': |
| 768 | $out->lines[] = $prop[1]; |
| 769 | break; |
| 770 | case "directive": |
| 771 | list(, $name, $value) = $prop; |
| 772 | $out->lines[] = "@$name " . $this->compileValue($this->reduce($value)).';'; |
| 773 | break; |
| 774 | case "comment": |
| 775 | $out->lines[] = $prop[1]; |
| 776 | break; |
| 777 | case "import"; |
| 778 | list(, $importPath, $importId) = $prop; |
| 779 | $importPath = $this->reduce($importPath); |
| 780 | |
| 781 | if (!isset($this->env->imports)) { |
| 782 | $this->env->imports = array(); |
| 783 | } |
| 784 | |
| 785 | $result = $this->tryImport($importPath, $block, $out); |
| 786 | |
| 787 | $this->env->imports[$importId] = $result === false ? |
| 788 | array(false, "@import " . $this->compileValue($importPath).";") : |
| 789 | $result; |
| 790 | |
| 791 | break; |
| 792 | case "import_mixin": |
| 793 | list(,$importId) = $prop; |
| 794 | $import = $this->env->imports[$importId]; |
| 795 | if ($import[0] === false) { |
| 796 | if (isset($import[1])) { |
| 797 | $out->lines[] = $import[1]; |
| 798 | } |
| 799 | } else { |
| 800 | list(, $bottom, $parser, $importDir) = $import; |
| 801 | $this->compileImportedProps($bottom, $block, $out, $parser, $importDir); |
| 802 | } |
| 803 | |
| 804 | break; |
| 805 | default: |
| 806 | $this->throwError("unknown op: {$prop[0]}\n"); |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | |
| 811 | /** |
| 812 | * Compiles a primitive value into a CSS property value. |
| 813 | * |
| 814 | * Values in lessphp are typed by being wrapped in arrays, their format is |
| 815 | * typically: |
| 816 | * |
| 817 | * array(type, contents [, additional_contents]*) |
| 818 | * |
| 819 | * The input is expected to be reduced. This function will not work on |
| 820 | * things like expressions and variables. |
| 821 | */ |
| 822 | public function compileValue($value) { |
| 823 | switch ($value[0]) { |
| 824 | case 'list': |
| 825 | // [1] - delimiter |
| 826 | // [2] - array of values |
| 827 | return implode($value[1], array_map(array($this, 'compileValue'), $value[2])); |
| 828 | case 'raw_color': |
| 829 | if (!empty($this->formatter->compressColors)) { |
| 830 | return $this->compileValue($this->coerceColor($value)); |
| 831 | } |
| 832 | return $value[1]; |
| 833 | case 'keyword': |
| 834 | // [1] - the keyword |
| 835 | return $value[1]; |
| 836 | case 'number': |
| 837 | list(, $num, $unit) = $value; |
| 838 | // [1] - the number |
| 839 | // [2] - the unit |
| 840 | if ($this->numberPrecision !== null) { |
| 841 | $num = round($num, $this->numberPrecision); |
| 842 | } |
| 843 | return $num . $unit; |
| 844 | case 'string': |
| 845 | // [1] - contents of string (includes quotes) |
| 846 | list(, $delim, $content) = $value; |
| 847 | foreach ($content as &$part) { |
| 848 | if (is_array($part)) { |
| 849 | $part = $this->compileValue($part); |
| 850 | } |
| 851 | } |
| 852 | return $delim . implode($content) . $delim; |
| 853 | case 'color': |
| 854 | // [1] - red component (either number or a %) |
| 855 | // [2] - green component |
| 856 | // [3] - blue component |
| 857 | // [4] - optional alpha component |
| 858 | list(, $r, $g, $b) = $value; |
| 859 | $r = round($r); |
| 860 | $g = round($g); |
| 861 | $b = round($b); |
| 862 | |
| 863 | if (count($value) == 5 && $value[4] != 1) { // rgba |
| 864 | return 'rgba('.$r.','.$g.','.$b.','.$value[4].')'; |
| 865 | } |
| 866 | |
| 867 | $h = sprintf("#%02x%02x%02x", $r, $g, $b); |
| 868 | |
| 869 | if (!empty($this->formatter->compressColors)) { |
| 870 | // Converting hex color to short notation (e.g. #003399 to #039) |
| 871 | if ($h[1] === $h[2] && $h[3] === $h[4] && $h[5] === $h[6]) { |
| 872 | $h = '#' . $h[1] . $h[3] . $h[5]; |
| 873 | } |
| 874 | } |
| 875 | |
| 876 | return $h; |
| 877 | |
| 878 | case 'function': |
| 879 | list(, $name, $args) = $value; |
| 880 | return $name.'('.$this->compileValue($args).')'; |
| 881 | default: // assumed to be unit |
| 882 | $this->throwError("unknown value type: $value[0]"); |
| 883 | } |
| 884 | } |
| 885 | |
| 886 | protected function lib_pow($args) { |
| 887 | list($base, $exp) = $this->assertArgs($args, 2, "pow"); |
| 888 | return pow($this->assertNumber($base), $this->assertNumber($exp)); |
| 889 | } |
| 890 | |
| 891 | protected function lib_pi() { |
| 892 | return pi(); |
| 893 | } |
| 894 | |
| 895 | protected function lib_mod($args) { |
| 896 | list($a, $b) = $this->assertArgs($args, 2, "mod"); |
| 897 | return $this->assertNumber($a) % $this->assertNumber($b); |
| 898 | } |
| 899 | |
| 900 | protected function lib_tan($num) { |
| 901 | return tan($this->assertNumber($num)); |
| 902 | } |
| 903 | |
| 904 | protected function lib_sin($num) { |
| 905 | return sin($this->assertNumber($num)); |
| 906 | } |
| 907 | |
| 908 | protected function lib_cos($num) { |
| 909 | return cos($this->assertNumber($num)); |
| 910 | } |
| 911 | |
| 912 | protected function lib_atan($num) { |
| 913 | $num = atan($this->assertNumber($num)); |
| 914 | return array("number", $num, "rad"); |
| 915 | } |
| 916 | |
| 917 | protected function lib_asin($num) { |
| 918 | $num = asin($this->assertNumber($num)); |
| 919 | return array("number", $num, "rad"); |
| 920 | } |
| 921 | |
| 922 | protected function lib_acos($num) { |
| 923 | $num = acos($this->assertNumber($num)); |
| 924 | return array("number", $num, "rad"); |
| 925 | } |
| 926 | |
| 927 | protected function lib_sqrt($num) { |
| 928 | return sqrt($this->assertNumber($num)); |
| 929 | } |
| 930 | |
| 931 | protected function lib_extract($value) { |
| 932 | list($list, $idx) = $this->assertArgs($value, 2, "extract"); |
| 933 | $idx = $this->assertNumber($idx); |
| 934 | // 1 indexed |
| 935 | if ($list[0] == "list" && isset($list[2][$idx - 1])) { |
| 936 | return $list[2][$idx - 1]; |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | protected function lib_isnumber($value) { |
| 941 | return $this->toBool($value[0] == "number"); |
| 942 | } |
| 943 | |
| 944 | protected function lib_isstring($value) { |
| 945 | return $this->toBool($value[0] == "string"); |
| 946 | } |
| 947 | |
| 948 | protected function lib_iscolor($value) { |
| 949 | return $this->toBool($this->coerceColor($value)); |
| 950 | } |
| 951 | |
| 952 | protected function lib_iskeyword($value) { |
| 953 | return $this->toBool($value[0] == "keyword"); |
| 954 | } |
| 955 | |
| 956 | protected function lib_ispixel($value) { |
| 957 | return $this->toBool($value[0] == "number" && $value[2] == "px"); |
| 958 | } |
| 959 | |
| 960 | protected function lib_ispercentage($value) { |
| 961 | return $this->toBool($value[0] == "number" && $value[2] == "%"); |
| 962 | } |
| 963 | |
| 964 | protected function lib_isem($value) { |
| 965 | return $this->toBool($value[0] == "number" && $value[2] == "em"); |
| 966 | } |
| 967 | |
| 968 | protected function lib_isrem($value) { |
| 969 | return $this->toBool($value[0] == "number" && $value[2] == "rem"); |
| 970 | } |
| 971 | |
| 972 | protected function lib_rgbahex($color) { |
| 973 | $color = $this->coerceColor($color); |
| 974 | if (is_null($color)) |
| 975 | $this->throwError("color expected for rgbahex"); |
| 976 | |
| 977 | return sprintf("#%02x%02x%02x%02x", |
| 978 | isset($color[4]) ? $color[4]*255 : 255, |
| 979 | $color[1],$color[2], $color[3]); |
| 980 | } |
| 981 | |
| 982 | protected function lib_argb($color){ |
| 983 | return $this->lib_rgbahex($color); |
| 984 | } |
| 985 | |
| 986 | /** |
| 987 | * Given an url, decide whether to output a regular link or the base64-encoded contents of the file |
| 988 | * |
| 989 | * @param array $value either an argument list (two strings) or a single string |
| 990 | * @return string formatted url(), either as a link or base64-encoded |
| 991 | */ |
| 992 | protected function lib_data_uri($value) { |
| 993 | $mime = ($value[0] === 'list') ? $value[2][0][2] : null; |
| 994 | $url = ($value[0] === 'list') ? $value[2][1][2][0] : $value[2][0]; |
| 995 | |
| 996 | $fullpath = $this->findImport($url); |
| 997 | |
| 998 | if($fullpath && ($fsize = filesize($fullpath)) !== false) { |
| 999 | // IE8 can't handle data uris larger than 32KB |
| 1000 | if($fsize/1024 < 32) { |
| 1001 | if(is_null($mime)) { |
| 1002 | if(class_exists('finfo')) { // php 5.3+ |
| 1003 | $finfo = new finfo(FILEINFO_MIME); |
| 1004 | $mime = explode('; ', $finfo->file($fullpath)); |
| 1005 | $mime = $mime[0]; |
| 1006 | } elseif(function_exists('mime_content_type')) { // PHP 5.2 |
| 1007 | $mime = mime_content_type($fullpath); |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | if(!is_null($mime)) // fallback if the mime type is still unknown |
| 1012 | $url = sprintf('data:%s;base64,%s', $mime, base64_encode(file_get_contents($fullpath))); |
| 1013 | } |
| 1014 | } |
| 1015 | |
| 1016 | return 'url("'.$url.'")'; |
| 1017 | } |
| 1018 | |
| 1019 | // utility func to unquote a string |
| 1020 | protected function lib_e($arg) { |
| 1021 | switch ($arg[0]) { |
| 1022 | case "list": |
| 1023 | $items = $arg[2]; |
| 1024 | if (isset($items[0])) { |
| 1025 | return $this->lib_e($items[0]); |
| 1026 | } |
| 1027 | $this->throwError("unrecognised input"); |
| 1028 | case "string": |
| 1029 | $arg[1] = ""; |
| 1030 | return $arg; |
| 1031 | case "keyword": |
| 1032 | return $arg; |
| 1033 | default: |
| 1034 | return array("keyword", $this->compileValue($arg)); |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | protected function lib__sprintf($args) { |
| 1039 | if ($args[0] != "list") return $args; |
| 1040 | $values = $args[2]; |
| 1041 | $string = array_shift($values); |
| 1042 | $template = $this->compileValue($this->lib_e($string)); |
| 1043 | |
| 1044 | $i = 0; |
| 1045 | if (preg_match_all('/%[dsa]/', $template, $m)) { |
| 1046 | foreach ($m[0] as $match) { |
| 1047 | $val = isset($values[$i]) ? |
| 1048 | $this->reduce($values[$i]) : array('keyword', ''); |
| 1049 | |
| 1050 | // lessjs compat, renders fully expanded color, not raw color |
| 1051 | if ($color = $this->coerceColor($val)) { |
| 1052 | $val = $color; |
| 1053 | } |
| 1054 | |
| 1055 | $i++; |
| 1056 | $rep = $this->compileValue($this->lib_e($val)); |
| 1057 | $template = preg_replace('/'.self::preg_quote($match).'/', |
| 1058 | $rep, $template, 1); |
| 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | $d = $string[0] == "string" ? $string[1] : '"'; |
| 1063 | return array("string", $d, array($template)); |
| 1064 | } |
| 1065 | |
| 1066 | protected function lib_floor($arg) { |
| 1067 | $value = $this->assertNumber($arg); |
| 1068 | return array("number", floor($value), $arg[2]); |
| 1069 | } |
| 1070 | |
| 1071 | protected function lib_ceil($arg) { |
| 1072 | $value = $this->assertNumber($arg); |
| 1073 | return array("number", ceil($value), $arg[2]); |
| 1074 | } |
| 1075 | |
| 1076 | protected function lib_round($arg) { |
| 1077 | if($arg[0] != "list") { |
| 1078 | $value = $this->assertNumber($arg); |
| 1079 | return array("number", round($value), $arg[2]); |
| 1080 | } else { |
| 1081 | $value = $this->assertNumber($arg[2][0]); |
| 1082 | $precision = $this->assertNumber($arg[2][1]); |
| 1083 | return array("number", round($value, $precision), $arg[2][0][2]); |
| 1084 | } |
| 1085 | } |
| 1086 | |
| 1087 | protected function lib_unit($arg) { |
| 1088 | if ($arg[0] == "list") { |
| 1089 | list($number, $newUnit) = $arg[2]; |
| 1090 | return array("number", $this->assertNumber($number), |
| 1091 | $this->compileValue($this->lib_e($newUnit))); |
| 1092 | } else { |
| 1093 | return array("number", $this->assertNumber($arg), ""); |
| 1094 | } |
| 1095 | } |
| 1096 | |
| 1097 | /** |
| 1098 | * Helper function to get arguments for color manipulation functions. |
| 1099 | * takes a list that contains a color like thing and a percentage |
| 1100 | */ |
| 1101 | public function colorArgs($args) { |
| 1102 | if ($args[0] != 'list' || count($args[2]) < 2) { |
| 1103 | return array(array('color', 0, 0, 0), 0); |
| 1104 | } |
| 1105 | list($color, $delta) = $args[2]; |
| 1106 | $color = $this->assertColor($color); |
| 1107 | $delta = floatval($delta[1]); |
| 1108 | |
| 1109 | return array($color, $delta); |
| 1110 | } |
| 1111 | |
| 1112 | protected function lib_darken($args) { |
| 1113 | list($color, $delta) = $this->colorArgs($args); |
| 1114 | |
| 1115 | $hsl = $this->toHSL($color); |
| 1116 | $hsl[3] = $this->clamp($hsl[3] - $delta, 100); |
| 1117 | return $this->toRGB($hsl); |
| 1118 | } |
| 1119 | |
| 1120 | protected function lib_lighten($args) { |
| 1121 | list($color, $delta) = $this->colorArgs($args); |
| 1122 | |
| 1123 | $hsl = $this->toHSL($color); |
| 1124 | $hsl[3] = $this->clamp($hsl[3] + $delta, 100); |
| 1125 | return $this->toRGB($hsl); |
| 1126 | } |
| 1127 | |
| 1128 | protected function lib_saturate($args) { |
| 1129 | list($color, $delta) = $this->colorArgs($args); |
| 1130 | |
| 1131 | $hsl = $this->toHSL($color); |
| 1132 | $hsl[2] = $this->clamp($hsl[2] + $delta, 100); |
| 1133 | return $this->toRGB($hsl); |
| 1134 | } |
| 1135 | |
| 1136 | protected function lib_desaturate($args) { |
| 1137 | list($color, $delta) = $this->colorArgs($args); |
| 1138 | |
| 1139 | $hsl = $this->toHSL($color); |
| 1140 | $hsl[2] = $this->clamp($hsl[2] - $delta, 100); |
| 1141 | return $this->toRGB($hsl); |
| 1142 | } |
| 1143 | |
| 1144 | protected function lib_spin($args) { |
| 1145 | list($color, $delta) = $this->colorArgs($args); |
| 1146 | |
| 1147 | $hsl = $this->toHSL($color); |
| 1148 | |
| 1149 | $hsl[1] = $hsl[1] + $delta % 360; |
| 1150 | if ($hsl[1] < 0) $hsl[1] += 360; |
| 1151 | |
| 1152 | return $this->toRGB($hsl); |
| 1153 | } |
| 1154 | |
| 1155 | protected function lib_fadeout($args) { |
| 1156 | list($color, $delta) = $this->colorArgs($args); |
| 1157 | $color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) - $delta/100); |
| 1158 | return $color; |
| 1159 | } |
| 1160 | |
| 1161 | protected function lib_fadein($args) { |
| 1162 | list($color, $delta) = $this->colorArgs($args); |
| 1163 | $color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) + $delta/100); |
| 1164 | return $color; |
| 1165 | } |
| 1166 | |
| 1167 | protected function lib_hue($color) { |
| 1168 | $hsl = $this->toHSL($this->assertColor($color)); |
| 1169 | return round($hsl[1]); |
| 1170 | } |
| 1171 | |
| 1172 | protected function lib_saturation($color) { |
| 1173 | $hsl = $this->toHSL($this->assertColor($color)); |
| 1174 | return round($hsl[2]); |
| 1175 | } |
| 1176 | |
| 1177 | protected function lib_lightness($color) { |
| 1178 | $hsl = $this->toHSL($this->assertColor($color)); |
| 1179 | return round($hsl[3]); |
| 1180 | } |
| 1181 | |
| 1182 | // get the alpha of a color |
| 1183 | // defaults to 1 for non-colors or colors without an alpha |
| 1184 | protected function lib_alpha($value) { |
| 1185 | if (!is_null($color = $this->coerceColor($value))) { |
| 1186 | return isset($color[4]) ? $color[4] : 1; |
| 1187 | } |
| 1188 | } |
| 1189 | |
| 1190 | // set the alpha of the color |
| 1191 | protected function lib_fade($args) { |
| 1192 | list($color, $alpha) = $this->colorArgs($args); |
| 1193 | $color[4] = $this->clamp($alpha / 100.0); |
| 1194 | return $color; |
| 1195 | } |
| 1196 | |
| 1197 | protected function lib_percentage($arg) { |
| 1198 | $num = $this->assertNumber($arg); |
| 1199 | return array("number", $num*100, "%"); |
| 1200 | } |
| 1201 | |
| 1202 | // mixes two colors by weight |
| 1203 | // mix(@color1, @color2, [@weight: 50%]); |
| 1204 | // http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method |
| 1205 | protected function lib_mix($args) { |
| 1206 | if ($args[0] != "list" || count($args[2]) < 2) |
| 1207 | $this->throwError("mix expects (color1, color2, weight)"); |
| 1208 | |
| 1209 | list($first, $second) = $args[2]; |
| 1210 | $first = $this->assertColor($first); |
| 1211 | $second = $this->assertColor($second); |
| 1212 | |
| 1213 | $first_a = $this->lib_alpha($first); |
| 1214 | $second_a = $this->lib_alpha($second); |
| 1215 | |
| 1216 | if (isset($args[2][2])) { |
| 1217 | $weight = $args[2][2][1] / 100.0; |
| 1218 | } else { |
| 1219 | $weight = 0.5; |
| 1220 | } |
| 1221 | |
| 1222 | $w = $weight * 2 - 1; |
| 1223 | $a = $first_a - $second_a; |
| 1224 | |
| 1225 | $w1 = (($w * $a == -1 ? $w : ($w + $a)/(1 + $w * $a)) + 1) / 2.0; |
| 1226 | $w2 = 1.0 - $w1; |
| 1227 | |
| 1228 | $new = array('color', |
| 1229 | $w1 * $first[1] + $w2 * $second[1], |
| 1230 | $w1 * $first[2] + $w2 * $second[2], |
| 1231 | $w1 * $first[3] + $w2 * $second[3], |
| 1232 | ); |
| 1233 | |
| 1234 | if ($first_a != 1.0 || $second_a != 1.0) { |
| 1235 | $new[] = $first_a * $weight + $second_a * ($weight - 1); |
| 1236 | } |
| 1237 | |
| 1238 | return $this->fixColor($new); |
| 1239 | } |
| 1240 | |
| 1241 | protected function lib_contrast($args) { |
| 1242 | $darkColor = array('color', 0, 0, 0); |
| 1243 | $lightColor = array('color', 255, 255, 255); |
| 1244 | $threshold = 0.43; |
| 1245 | |
| 1246 | if ( $args[0] == 'list' ) { |
| 1247 | $inputColor = ( isset($args[2][0]) ) ? $this->assertColor($args[2][0]) : $lightColor; |
| 1248 | $darkColor = ( isset($args[2][1]) ) ? $this->assertColor($args[2][1]) : $darkColor; |
| 1249 | $lightColor = ( isset($args[2][2]) ) ? $this->assertColor($args[2][2]) : $lightColor; |
| 1250 | $threshold = ( isset($args[2][3]) ) ? $this->assertNumber($args[2][3]) : $threshold; |
| 1251 | } |
| 1252 | else { |
| 1253 | $inputColor = $this->assertColor($args); |
| 1254 | } |
| 1255 | |
| 1256 | $inputColor = $this->coerceColor($inputColor); |
| 1257 | $darkColor = $this->coerceColor($darkColor); |
| 1258 | $lightColor = $this->coerceColor($lightColor); |
| 1259 | |
| 1260 | //Figure out which is actually light and dark! |
| 1261 | if ( $this->lib_luma($darkColor) > $this->lib_luma($lightColor) ) { |
| 1262 | $t = $lightColor; |
| 1263 | $lightColor = $darkColor; |
| 1264 | $darkColor = $t; |
| 1265 | } |
| 1266 | |
| 1267 | $inputColor_alpha = $this->lib_alpha($inputColor); |
| 1268 | if ( ( $this->lib_luma($inputColor) * $inputColor_alpha) < $threshold) { |
| 1269 | return $lightColor; |
| 1270 | } |
| 1271 | return $darkColor; |
| 1272 | } |
| 1273 | |
| 1274 | protected function lib_luma($color) { |
| 1275 | $color = $this->coerceColor($color); |
| 1276 | return (0.2126 * $color[0] / 255) + (0.7152 * $color[1] / 255) + (0.0722 * $color[2] / 255); |
| 1277 | } |
| 1278 | |
| 1279 | |
| 1280 | public function assertColor($value, $error = "expected color value") { |
| 1281 | $color = $this->coerceColor($value); |
| 1282 | if (is_null($color)) $this->throwError($error); |
| 1283 | return $color; |
| 1284 | } |
| 1285 | |
| 1286 | public function assertNumber($value, $error = "expecting number") { |
| 1287 | if ($value[0] == "number") return $value[1]; |
| 1288 | $this->throwError($error); |
| 1289 | } |
| 1290 | |
| 1291 | public function assertArgs($value, $expectedArgs, $name="") { |
| 1292 | if ($expectedArgs == 1) { |
| 1293 | return $value; |
| 1294 | } else { |
| 1295 | if ($value[0] !== "list" || $value[1] != ",") $this->throwError("expecting list"); |
| 1296 | $values = $value[2]; |
| 1297 | $numValues = count($values); |
| 1298 | if ($expectedArgs != $numValues) { |
| 1299 | if ($name) { |
| 1300 | $name = $name . ": "; |
| 1301 | } |
| 1302 | |
| 1303 | $this->throwError("${name}expecting $expectedArgs arguments, got $numValues"); |
| 1304 | } |
| 1305 | |
| 1306 | return $values; |
| 1307 | } |
| 1308 | } |
| 1309 | |
| 1310 | protected function toHSL($color) { |
| 1311 | if ($color[0] == 'hsl') return $color; |
| 1312 | |
| 1313 | $r = $color[1] / 255; |
| 1314 | $g = $color[2] / 255; |
| 1315 | $b = $color[3] / 255; |
| 1316 | |
| 1317 | $min = min($r, $g, $b); |
| 1318 | $max = max($r, $g, $b); |
| 1319 | |
| 1320 | $L = ($min + $max) / 2; |
| 1321 | if ($min == $max) { |
| 1322 | $S = $H = 0; |
| 1323 | } else { |
| 1324 | if ($L < 0.5) |
| 1325 | $S = ($max - $min)/($max + $min); |
| 1326 | else |
| 1327 | $S = ($max - $min)/(2.0 - $max - $min); |
| 1328 | |
| 1329 | if ($r == $max) $H = ($g - $b)/($max - $min); |
| 1330 | elseif ($g == $max) $H = 2.0 + ($b - $r)/($max - $min); |
| 1331 | elseif ($b == $max) $H = 4.0 + ($r - $g)/($max - $min); |
| 1332 | |
| 1333 | } |
| 1334 | |
| 1335 | $out = array('hsl', |
| 1336 | ($H < 0 ? $H + 6 : $H)*60, |
| 1337 | $S*100, |
| 1338 | $L*100, |
| 1339 | ); |
| 1340 | |
| 1341 | if (count($color) > 4) $out[] = $color[4]; // copy alpha |
| 1342 | return $out; |
| 1343 | } |
| 1344 | |
| 1345 | protected function toRGB_helper($comp, $temp1, $temp2) { |
| 1346 | if ($comp < 0) $comp += 1.0; |
| 1347 | elseif ($comp > 1) $comp -= 1.0; |
| 1348 | |
| 1349 | if (6 * $comp < 1) return $temp1 + ($temp2 - $temp1) * 6 * $comp; |
| 1350 | if (2 * $comp < 1) return $temp2; |
| 1351 | if (3 * $comp < 2) return $temp1 + ($temp2 - $temp1)*((2/3) - $comp) * 6; |
| 1352 | |
| 1353 | return $temp1; |
| 1354 | } |
| 1355 | |
| 1356 | /** |
| 1357 | * Converts a hsl array into a color value in rgb. |
| 1358 | * Expects H to be in range of 0 to 360, S and L in 0 to 100 |
| 1359 | */ |
| 1360 | protected function toRGB($color) { |
| 1361 | if ($color[0] == 'color') return $color; |
| 1362 | |
| 1363 | $H = $color[1] / 360; |
| 1364 | $S = $color[2] / 100; |
| 1365 | $L = $color[3] / 100; |
| 1366 | |
| 1367 | if ($S == 0) { |
| 1368 | $r = $g = $b = $L; |
| 1369 | } else { |
| 1370 | $temp2 = $L < 0.5 ? |
| 1371 | $L*(1.0 + $S) : |
| 1372 | $L + $S - $L * $S; |
| 1373 | |
| 1374 | $temp1 = 2.0 * $L - $temp2; |
| 1375 | |
| 1376 | $r = $this->toRGB_helper($H + 1/3, $temp1, $temp2); |
| 1377 | $g = $this->toRGB_helper($H, $temp1, $temp2); |
| 1378 | $b = $this->toRGB_helper($H - 1/3, $temp1, $temp2); |
| 1379 | } |
| 1380 | |
| 1381 | // $out = array('color', round($r*255), round($g*255), round($b*255)); |
| 1382 | $out = array('color', $r*255, $g*255, $b*255); |
| 1383 | if (count($color) > 4) $out[] = $color[4]; // copy alpha |
| 1384 | return $out; |
| 1385 | } |
| 1386 | |
| 1387 | protected function clamp($v, $max = 1, $min = 0) { |
| 1388 | return min($max, max($min, $v)); |
| 1389 | } |
| 1390 | |
| 1391 | /** |
| 1392 | * Convert the rgb, rgba, hsl color literals of function type |
| 1393 | * as returned by the parser into values of color type. |
| 1394 | */ |
| 1395 | protected function funcToColor($func) { |
| 1396 | $fname = $func[1]; |
| 1397 | if ($func[2][0] != 'list') return false; // need a list of arguments |
| 1398 | $rawComponents = $func[2][2]; |
| 1399 | |
| 1400 | if ($fname == 'hsl' || $fname == 'hsla') { |
| 1401 | $hsl = array('hsl'); |
| 1402 | $i = 0; |
| 1403 | foreach ($rawComponents as $c) { |
| 1404 | $val = $this->reduce($c); |
| 1405 | $val = isset($val[1]) ? floatval($val[1]) : 0; |
| 1406 | |
| 1407 | if ($i == 0) $clamp = 360; |
| 1408 | elseif ($i < 3) $clamp = 100; |
| 1409 | else $clamp = 1; |
| 1410 | |
| 1411 | $hsl[] = $this->clamp($val, $clamp); |
| 1412 | $i++; |
| 1413 | } |
| 1414 | |
| 1415 | while (count($hsl) < 4) $hsl[] = 0; |
| 1416 | return $this->toRGB($hsl); |
| 1417 | |
| 1418 | } elseif ($fname == 'rgb' || $fname == 'rgba') { |
| 1419 | $components = array(); |
| 1420 | $i = 1; |
| 1421 | foreach ($rawComponents as $c) { |
| 1422 | $c = $this->reduce($c); |
| 1423 | if ($i < 4) { |
| 1424 | if ($c[0] == "number" && $c[2] == "%") { |
| 1425 | $components[] = 255 * ($c[1] / 100); |
| 1426 | } else { |
| 1427 | $components[] = floatval($c[1]); |
| 1428 | } |
| 1429 | } elseif ($i == 4) { |
| 1430 | if ($c[0] == "number" && $c[2] == "%") { |
| 1431 | $components[] = 1.0 * ($c[1] / 100); |
| 1432 | } else { |
| 1433 | $components[] = floatval($c[1]); |
| 1434 | } |
| 1435 | } else break; |
| 1436 | |
| 1437 | $i++; |
| 1438 | } |
| 1439 | while (count($components) < 3) $components[] = 0; |
| 1440 | array_unshift($components, 'color'); |
| 1441 | return $this->fixColor($components); |
| 1442 | } |
| 1443 | |
| 1444 | return false; |
| 1445 | } |
| 1446 | |
| 1447 | protected function reduce($value, $forExpression = false) { |
| 1448 | switch ($value[0]) { |
| 1449 | case "interpolate": |
| 1450 | $reduced = $this->reduce($value[1]); |
| 1451 | $var = $this->compileValue($reduced); |
| 1452 | $res = $this->reduce(array("variable", $this->vPrefix . $var)); |
| 1453 | |
| 1454 | if ($res[0] == "raw_color") { |
| 1455 | $res = $this->coerceColor($res); |
| 1456 | } |
| 1457 | |
| 1458 | if (empty($value[2])) $res = $this->lib_e($res); |
| 1459 | |
| 1460 | return $res; |
| 1461 | case "variable": |
| 1462 | $key = $value[1]; |
| 1463 | if (is_array($key)) { |
| 1464 | $key = $this->reduce($key); |
| 1465 | $key = $this->vPrefix . $this->compileValue($this->lib_e($key)); |
| 1466 | } |
| 1467 | |
| 1468 | $seen =& $this->env->seenNames; |
| 1469 | |
| 1470 | if (!empty($seen[$key])) { |
| 1471 | $this->throwError("infinite loop detected: $key"); |
| 1472 | } |
| 1473 | |
| 1474 | $seen[$key] = true; |
| 1475 | $out = $this->reduce($this->get($key)); |
| 1476 | $seen[$key] = false; |
| 1477 | return $out; |
| 1478 | case "list": |
| 1479 | foreach ($value[2] as &$item) { |
| 1480 | $item = $this->reduce($item, $forExpression); |
| 1481 | } |
| 1482 | return $value; |
| 1483 | case "expression": |
| 1484 | return $this->evaluate($value); |
| 1485 | case "string": |
| 1486 | foreach ($value[2] as &$part) { |
| 1487 | if (is_array($part)) { |
| 1488 | $strip = $part[0] == "variable"; |
| 1489 | $part = $this->reduce($part); |
| 1490 | if ($strip) $part = $this->lib_e($part); |
| 1491 | } |
| 1492 | } |
| 1493 | return $value; |
| 1494 | case "escape": |
| 1495 | list(,$inner) = $value; |
| 1496 | return $this->lib_e($this->reduce($inner)); |
| 1497 | case "function": |
| 1498 | $color = $this->funcToColor($value); |
| 1499 | if ($color) return $color; |
| 1500 | |
| 1501 | list(, $name, $args) = $value; |
| 1502 | if ($name == "%") $name = "_sprintf"; |
| 1503 | |
| 1504 | $f = isset($this->libFunctions[$name]) ? |
| 1505 | $this->libFunctions[$name] : array($this, 'lib_'.str_replace('-', '_', $name)); |
| 1506 | |
| 1507 | if (is_callable($f)) { |
| 1508 | if ($args[0] == 'list') |
| 1509 | $args = self::compressList($args[2], $args[1]); |
| 1510 | |
| 1511 | $ret = call_user_func($f, $this->reduce($args, true), $this); |
| 1512 | |
| 1513 | if (is_null($ret)) { |
| 1514 | return array("string", "", array( |
| 1515 | $name, "(", $args, ")" |
| 1516 | )); |
| 1517 | } |
| 1518 | |
| 1519 | // convert to a typed value if the result is a php primitive |
| 1520 | if (is_numeric($ret)) $ret = array('number', $ret, ""); |
| 1521 | elseif (!is_array($ret)) $ret = array('keyword', $ret); |
| 1522 | |
| 1523 | return $ret; |
| 1524 | } |
| 1525 | |
| 1526 | // plain function, reduce args |
| 1527 | $value[2] = $this->reduce($value[2]); |
| 1528 | return $value; |
| 1529 | case "unary": |
| 1530 | list(, $op, $exp) = $value; |
| 1531 | $exp = $this->reduce($exp); |
| 1532 | |
| 1533 | if ($exp[0] == "number") { |
| 1534 | switch ($op) { |
| 1535 | case "+": |
| 1536 | return $exp; |
| 1537 | case "-": |
| 1538 | $exp[1] *= -1; |
| 1539 | return $exp; |
| 1540 | } |
| 1541 | } |
| 1542 | return array("string", "", array($op, $exp)); |
| 1543 | } |
| 1544 | |
| 1545 | if ($forExpression) { |
| 1546 | switch ($value[0]) { |
| 1547 | case "keyword": |
| 1548 | if ($color = $this->coerceColor($value)) { |
| 1549 | return $color; |
| 1550 | } |
| 1551 | break; |
| 1552 | case "raw_color": |
| 1553 | return $this->coerceColor($value); |
| 1554 | } |
| 1555 | } |
| 1556 | |
| 1557 | return $value; |
| 1558 | } |
| 1559 | |
| 1560 | |
| 1561 | // coerce a value for use in color operation |
| 1562 | protected function coerceColor($value) { |
| 1563 | switch($value[0]) { |
| 1564 | case 'color': return $value; |
| 1565 | case 'raw_color': |
| 1566 | $c = array("color", 0, 0, 0); |
| 1567 | $colorStr = substr($value[1], 1); |
| 1568 | $num = hexdec($colorStr); |
| 1569 | $width = strlen($colorStr) == 3 ? 16 : 256; |
| 1570 | |
| 1571 | for ($i = 3; $i > 0; $i--) { // 3 2 1 |
| 1572 | $t = $num % $width; |
| 1573 | $num /= $width; |
| 1574 | |
| 1575 | $c[$i] = $t * (256/$width) + $t * floor(16/$width); |
| 1576 | } |
| 1577 | |
| 1578 | return $c; |
| 1579 | case 'keyword': |
| 1580 | $name = $value[1]; |
| 1581 | if (isset(self::$cssColors[$name])) { |
| 1582 | $rgba = explode(',', self::$cssColors[$name]); |
| 1583 | |
| 1584 | if(isset($rgba[3])) |
| 1585 | return array('color', $rgba[0], $rgba[1], $rgba[2], $rgba[3]); |
| 1586 | |
| 1587 | return array('color', $rgba[0], $rgba[1], $rgba[2]); |
| 1588 | } |
| 1589 | return null; |
| 1590 | } |
| 1591 | } |
| 1592 | |
| 1593 | // make something string like into a string |
| 1594 | protected function coerceString($value) { |
| 1595 | switch ($value[0]) { |
| 1596 | case "string": |
| 1597 | return $value; |
| 1598 | case "keyword": |
| 1599 | return array("string", "", array($value[1])); |
| 1600 | } |
| 1601 | return null; |
| 1602 | } |
| 1603 | |
| 1604 | // turn list of length 1 into value type |
| 1605 | protected function flattenList($value) { |
| 1606 | if ($value[0] == "list" && count($value[2]) == 1) { |
| 1607 | return $this->flattenList($value[2][0]); |
| 1608 | } |
| 1609 | return $value; |
| 1610 | } |
| 1611 | |
| 1612 | public function toBool($a) { |
| 1613 | if ($a) return self::$TRUE; |
| 1614 | else return self::$FALSE; |
| 1615 | } |
| 1616 | |
| 1617 | // evaluate an expression |
| 1618 | protected function evaluate($exp) { |
| 1619 | list(, $op, $left, $right, $whiteBefore, $whiteAfter) = $exp; |
| 1620 | |
| 1621 | $left = $this->reduce($left, true); |
| 1622 | $right = $this->reduce($right, true); |
| 1623 | |
| 1624 | if ($leftColor = $this->coerceColor($left)) { |
| 1625 | $left = $leftColor; |
| 1626 | } |
| 1627 | |
| 1628 | if ($rightColor = $this->coerceColor($right)) { |
| 1629 | $right = $rightColor; |
| 1630 | } |
| 1631 | |
| 1632 | $ltype = $left[0]; |
| 1633 | $rtype = $right[0]; |
| 1634 | |
| 1635 | // operators that work on all types |
| 1636 | if ($op == "and") { |
| 1637 | return $this->toBool($left == self::$TRUE && $right == self::$TRUE); |
| 1638 | } |
| 1639 | |
| 1640 | if ($op == "=") { |
| 1641 | return $this->toBool($this->eq($left, $right) ); |
| 1642 | } |
| 1643 | |
| 1644 | if ($op == "+" && !is_null($str = $this->stringConcatenate($left, $right))) { |
| 1645 | return $str; |
| 1646 | } |
| 1647 | |
| 1648 | // type based operators |
| 1649 | $fname = "op_${ltype}_${rtype}"; |
| 1650 | if (is_callable(array($this, $fname))) { |
| 1651 | $out = $this->$fname($op, $left, $right); |
| 1652 | if (!is_null($out)) return $out; |
| 1653 | } |
| 1654 | |
| 1655 | // make the expression look it did before being parsed |
| 1656 | $paddedOp = $op; |
| 1657 | if ($whiteBefore) $paddedOp = " " . $paddedOp; |
| 1658 | if ($whiteAfter) $paddedOp .= " "; |
| 1659 | |
| 1660 | return array("string", "", array($left, $paddedOp, $right)); |
| 1661 | } |
| 1662 | |
| 1663 | protected function stringConcatenate($left, $right) { |
| 1664 | if ($strLeft = $this->coerceString($left)) { |
| 1665 | if ($right[0] == "string") { |
| 1666 | $right[1] = ""; |
| 1667 | } |
| 1668 | $strLeft[2][] = $right; |
| 1669 | return $strLeft; |
| 1670 | } |
| 1671 | |
| 1672 | if ($strRight = $this->coerceString($right)) { |
| 1673 | array_unshift($strRight[2], $left); |
| 1674 | return $strRight; |
| 1675 | } |
| 1676 | } |
| 1677 | |
| 1678 | |
| 1679 | // make sure a color's components don't go out of bounds |
| 1680 | protected function fixColor($c) { |
| 1681 | foreach (range(1, 3) as $i) { |
| 1682 | if ($c[$i] < 0) $c[$i] = 0; |
| 1683 | if ($c[$i] > 255) $c[$i] = 255; |
| 1684 | } |
| 1685 | |
| 1686 | return $c; |
| 1687 | } |
| 1688 | |
| 1689 | protected function op_number_color($op, $lft, $rgt) { |
| 1690 | if ($op == '+' || $op == '*') { |
| 1691 | return $this->op_color_number($op, $rgt, $lft); |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | protected function op_color_number($op, $lft, $rgt) { |
| 1696 | if ($rgt[0] == '%') $rgt[1] /= 100; |
| 1697 | |
| 1698 | return $this->op_color_color($op, $lft, |
| 1699 | array_fill(1, count($lft) - 1, $rgt[1])); |
| 1700 | } |
| 1701 | |
| 1702 | protected function op_color_color($op, $left, $right) { |
| 1703 | $out = array('color'); |
| 1704 | $max = count($left) > count($right) ? count($left) : count($right); |
| 1705 | foreach (range(1, $max - 1) as $i) { |
| 1706 | $lval = isset($left[$i]) ? $left[$i] : 0; |
| 1707 | $rval = isset($right[$i]) ? $right[$i] : 0; |
| 1708 | switch ($op) { |
| 1709 | case '+': |
| 1710 | $out[] = $lval + $rval; |
| 1711 | break; |
| 1712 | case '-': |
| 1713 | $out[] = $lval - $rval; |
| 1714 | break; |
| 1715 | case '*': |
| 1716 | $out[] = $lval * $rval; |
| 1717 | break; |
| 1718 | case '%': |
| 1719 | $out[] = $lval % $rval; |
| 1720 | break; |
| 1721 | case '/': |
| 1722 | if ($rval == 0) $this->throwError("evaluate error: can't divide by zero"); |
| 1723 | $out[] = $lval / $rval; |
| 1724 | break; |
| 1725 | default: |
| 1726 | $this->throwError('evaluate error: color op number failed on op '.$op); |
| 1727 | } |
| 1728 | } |
| 1729 | return $this->fixColor($out); |
| 1730 | } |
| 1731 | |
| 1732 | function lib_red($color){ |
| 1733 | $color = $this->coerceColor($color); |
| 1734 | if (is_null($color)) { |
| 1735 | $this->throwError('color expected for red()'); |
| 1736 | } |
| 1737 | |
| 1738 | return $color[1]; |
| 1739 | } |
| 1740 | |
| 1741 | function lib_green($color){ |
| 1742 | $color = $this->coerceColor($color); |
| 1743 | if (is_null($color)) { |
| 1744 | $this->throwError('color expected for green()'); |
| 1745 | } |
| 1746 | |
| 1747 | return $color[2]; |
| 1748 | } |
| 1749 | |
| 1750 | function lib_blue($color){ |
| 1751 | $color = $this->coerceColor($color); |
| 1752 | if (is_null($color)) { |
| 1753 | $this->throwError('color expected for blue()'); |
| 1754 | } |
| 1755 | |
| 1756 | return $color[3]; |
| 1757 | } |
| 1758 | |
| 1759 | |
| 1760 | // operator on two numbers |
| 1761 | protected function op_number_number($op, $left, $right) { |
| 1762 | $unit = empty($left[2]) ? $right[2] : $left[2]; |
| 1763 | |
| 1764 | $value = 0; |
| 1765 | switch ($op) { |
| 1766 | case '+': |
| 1767 | $value = $left[1] + $right[1]; |
| 1768 | break; |
| 1769 | case '*': |
| 1770 | $value = $left[1] * $right[1]; |
| 1771 | break; |
| 1772 | case '-': |
| 1773 | $value = $left[1] - $right[1]; |
| 1774 | break; |
| 1775 | case '%': |
| 1776 | $value = $left[1] % $right[1]; |
| 1777 | break; |
| 1778 | case '/': |
| 1779 | if ($right[1] == 0) $this->throwError('parse error: divide by zero'); |
| 1780 | $value = $left[1] / $right[1]; |
| 1781 | break; |
| 1782 | case '<': |
| 1783 | return $this->toBool($left[1] < $right[1]); |
| 1784 | case '>': |
| 1785 | return $this->toBool($left[1] > $right[1]); |
| 1786 | case '>=': |
| 1787 | return $this->toBool($left[1] >= $right[1]); |
| 1788 | case '=<': |
| 1789 | return $this->toBool($left[1] <= $right[1]); |
| 1790 | default: |
| 1791 | $this->throwError('parse error: unknown number operator: '.$op); |
| 1792 | } |
| 1793 | |
| 1794 | return array("number", $value, $unit); |
| 1795 | } |
| 1796 | |
| 1797 | |
| 1798 | /* environment functions */ |
| 1799 | |
| 1800 | protected function makeOutputBlock($type, $selectors = null) { |
| 1801 | $b = new stdclass; |
| 1802 | $b->lines = array(); |
| 1803 | $b->children = array(); |
| 1804 | $b->selectors = $selectors; |
| 1805 | $b->type = $type; |
| 1806 | $b->parent = $this->scope; |
| 1807 | return $b; |
| 1808 | } |
| 1809 | |
| 1810 | // the state of execution |
| 1811 | protected function pushEnv($block = null) { |
| 1812 | $e = new stdclass; |
| 1813 | $e->parent = $this->env; |
| 1814 | $e->store = array(); |
| 1815 | $e->block = $block; |
| 1816 | |
| 1817 | $this->env = $e; |
| 1818 | return $e; |
| 1819 | } |
| 1820 | |
| 1821 | // pop something off the stack |
| 1822 | protected function popEnv() { |
| 1823 | $old = $this->env; |
| 1824 | $this->env = $this->env->parent; |
| 1825 | return $old; |
| 1826 | } |
| 1827 | |
| 1828 | // set something in the current env |
| 1829 | protected function set($name, $value) { |
| 1830 | $this->env->store[$name] = $value; |
| 1831 | } |
| 1832 | |
| 1833 | |
| 1834 | // get the highest occurrence entry for a name |
| 1835 | protected function get($name) { |
| 1836 | $current = $this->env; |
| 1837 | |
| 1838 | $isArguments = $name == $this->vPrefix . 'arguments'; |
| 1839 | while ($current) { |
| 1840 | if ($isArguments && isset($current->arguments)) { |
| 1841 | return array('list', ' ', $current->arguments); |
| 1842 | } |
| 1843 | |
| 1844 | if (isset($current->store[$name])) |
| 1845 | return $current->store[$name]; |
| 1846 | else { |
| 1847 | $current = isset($current->storeParent) ? |
| 1848 | $current->storeParent : $current->parent; |
| 1849 | } |
| 1850 | } |
| 1851 | |
| 1852 | $this->throwError("variable $name is undefined"); |
| 1853 | } |
| 1854 | |
| 1855 | // inject array of unparsed strings into environment as variables |
| 1856 | protected function injectVariables($args) { |
| 1857 | $this->pushEnv(); |
| 1858 | $parser = new lessc_parser($this, __METHOD__); |
| 1859 | foreach ($args as $name => $strValue) { |
| 1860 | if ($name[0] != '@') $name = '@'.$name; |
| 1861 | $parser->count = 0; |
| 1862 | $parser->buffer = (string)$strValue; |
| 1863 | if (!$parser->propertyValue($value)) { |
| 1864 | throw new Exception("failed to parse passed in variable $name: $strValue"); |
| 1865 | } |
| 1866 | |
| 1867 | $this->set($name, $value); |
| 1868 | } |
| 1869 | } |
| 1870 | |
| 1871 | /** |
| 1872 | * Initialize any static state, can initialize parser for a file |
| 1873 | * $opts isn't used yet |
| 1874 | */ |
| 1875 | public function __construct($fname = null) { |
| 1876 | if ($fname !== null) { |
| 1877 | // used for deprecated parse method |
| 1878 | $this->_parseFile = $fname; |
| 1879 | } |
| 1880 | } |
| 1881 | |
| 1882 | public function compile($string, $name = null) { |
| 1883 | $locale = setlocale(LC_NUMERIC, 0); |
| 1884 | setlocale(LC_NUMERIC, "C"); |
| 1885 | |
| 1886 | $this->parser = $this->makeParser($name); |
| 1887 | $root = $this->parser->parse($string); |
| 1888 | |
| 1889 | $this->env = null; |
| 1890 | $this->scope = null; |
| 1891 | |
| 1892 | $this->formatter = $this->newFormatter(); |
| 1893 | |
| 1894 | if (!empty($this->registeredVars)) { |
| 1895 | $this->injectVariables($this->registeredVars); |
| 1896 | } |
| 1897 | |
| 1898 | $this->sourceParser = $this->parser; // used for error messages |
| 1899 | $this->compileBlock($root); |
| 1900 | |
| 1901 | ob_start(); |
| 1902 | $this->formatter->block($this->scope); |
| 1903 | $out = ob_get_clean(); |
| 1904 | setlocale(LC_NUMERIC, $locale); |
| 1905 | return $out; |
| 1906 | } |
| 1907 | |
| 1908 | public function compileFile($fname, $outFname = null) { |
| 1909 | if (!is_readable($fname)) { |
| 1910 | throw new Exception('load error: failed to find '.$fname); |
| 1911 | } |
| 1912 | |
| 1913 | $pi = pathinfo($fname); |
| 1914 | |
| 1915 | $oldImport = $this->importDir; |
| 1916 | |
| 1917 | $this->importDir = (array)$this->importDir; |
| 1918 | $this->importDir[] = $pi['dirname'].'/'; |
| 1919 | |
| 1920 | $this->addParsedFile($fname); |
| 1921 | |
| 1922 | $out = $this->compile(file_get_contents($fname), $fname); |
| 1923 | |
| 1924 | $this->importDir = $oldImport; |
| 1925 | |
| 1926 | if ($outFname !== null) { |
| 1927 | return file_put_contents($outFname, $out); |
| 1928 | } |
| 1929 | |
| 1930 | return $out; |
| 1931 | } |
| 1932 | |
| 1933 | // compile only if changed input has changed or output doesn't exist |
| 1934 | public function checkedCompile($in, $out) { |
| 1935 | if (!is_file($out) || filemtime($in) > filemtime($out)) { |
| 1936 | $this->compileFile($in, $out); |
| 1937 | return true; |
| 1938 | } |
| 1939 | return false; |
| 1940 | } |
| 1941 | |
| 1942 | /** |
| 1943 | * Execute lessphp on a .less file or a lessphp cache structure |
| 1944 | * |
| 1945 | * The lessphp cache structure contains information about a specific |
| 1946 | * less file having been parsed. It can be used as a hint for future |
| 1947 | * calls to determine whether or not a rebuild is required. |
| 1948 | * |
| 1949 | * The cache structure contains two important keys that may be used |
| 1950 | * externally: |
| 1951 | * |
| 1952 | * compiled: The final compiled CSS |
| 1953 | * updated: The time (in seconds) the CSS was last compiled |
| 1954 | * |
| 1955 | * The cache structure is a plain-ol' PHP associative array and can |
| 1956 | * be serialized and unserialized without a hitch. |
| 1957 | * |
| 1958 | * @param mixed $in Input |
| 1959 | * @param bool $force Force rebuild? |
| 1960 | * @return array lessphp cache structure |
| 1961 | */ |
| 1962 | public function cachedCompile($in, $force = false) { |
| 1963 | // assume no root |
| 1964 | $root = null; |
| 1965 | |
| 1966 | if (is_string($in)) { |
| 1967 | $root = $in; |
| 1968 | } elseif (is_array($in) and isset($in['root'])) { |
| 1969 | if ($force or ! isset($in['files'])) { |
| 1970 | // If we are forcing a recompile or if for some reason the |
| 1971 | // structure does not contain any file information we should |
| 1972 | // specify the root to trigger a rebuild. |
| 1973 | $root = $in['root']; |
| 1974 | } elseif (isset($in['files']) and is_array($in['files'])) { |
| 1975 | foreach ($in['files'] as $fname => $ftime ) { |
| 1976 | if (!file_exists($fname) or filemtime($fname) > $ftime) { |
| 1977 | // One of the files we knew about previously has changed |
| 1978 | // so we should look at our incoming root again. |
| 1979 | $root = $in['root']; |
| 1980 | break; |
| 1981 | } |
| 1982 | } |
| 1983 | } |
| 1984 | } else { |
| 1985 | // TODO: Throw an exception? We got neither a string nor something |
| 1986 | // that looks like a compatible lessphp cache structure. |
| 1987 | return null; |
| 1988 | } |
| 1989 | |
| 1990 | if ($root !== null) { |
| 1991 | // If we have a root value which means we should rebuild. |
| 1992 | $out = array(); |
| 1993 | $out['root'] = $root; |
| 1994 | $out['compiled'] = $this->compileFile($root); |
| 1995 | $out['files'] = $this->allParsedFiles(); |
| 1996 | $out['updated'] = time(); |
| 1997 | return $out; |
| 1998 | } else { |
| 1999 | // No changes, pass back the structure |
| 2000 | // we were given initially. |
| 2001 | return $in; |
| 2002 | } |
| 2003 | |
| 2004 | } |
| 2005 | |
| 2006 | // parse and compile buffer |
| 2007 | // This is deprecated |
| 2008 | public function parse($str = null, $initialVariables = null) { |
| 2009 | if (is_array($str)) { |
| 2010 | $initialVariables = $str; |
| 2011 | $str = null; |
| 2012 | } |
| 2013 | |
| 2014 | $oldVars = $this->registeredVars; |
| 2015 | if ($initialVariables !== null) { |
| 2016 | $this->setVariables($initialVariables); |
| 2017 | } |
| 2018 | |
| 2019 | if ($str == null) { |
| 2020 | if (empty($this->_parseFile)) { |
| 2021 | throw new exception("nothing to parse"); |
| 2022 | } |
| 2023 | |
| 2024 | $out = $this->compileFile($this->_parseFile); |
| 2025 | } else { |
| 2026 | $out = $this->compile($str); |
| 2027 | } |
| 2028 | |
| 2029 | $this->registeredVars = $oldVars; |
| 2030 | return $out; |
| 2031 | } |
| 2032 | |
| 2033 | protected function makeParser($name) { |
| 2034 | $parser = new lessc_parser($this, $name); |
| 2035 | $parser->writeComments = $this->preserveComments; |
| 2036 | |
| 2037 | return $parser; |
| 2038 | } |
| 2039 | |
| 2040 | public function setFormatter($name) { |
| 2041 | $this->formatterName = $name; |
| 2042 | } |
| 2043 | |
| 2044 | protected function newFormatter() { |
| 2045 | $className = "lessc_formatter_lessjs"; |
| 2046 | if (!empty($this->formatterName)) { |
| 2047 | if (!is_string($this->formatterName)) |
| 2048 | return $this->formatterName; |
| 2049 | $className = "lessc_formatter_$this->formatterName"; |
| 2050 | } |
| 2051 | |
| 2052 | return new $className; |
| 2053 | } |
| 2054 | |
| 2055 | public function setPreserveComments($preserve) { |
| 2056 | $this->preserveComments = $preserve; |
| 2057 | } |
| 2058 | |
| 2059 | public function registerFunction($name, $func) { |
| 2060 | $this->libFunctions[$name] = $func; |
| 2061 | } |
| 2062 | |
| 2063 | public function unregisterFunction($name) { |
| 2064 | unset($this->libFunctions[$name]); |
| 2065 | } |
| 2066 | |
| 2067 | public function setVariables($variables) { |
| 2068 | $this->registeredVars = array_merge($this->registeredVars, $variables); |
| 2069 | } |
| 2070 | |
| 2071 | public function unsetVariable($name) { |
| 2072 | unset($this->registeredVars[$name]); |
| 2073 | } |
| 2074 | |
| 2075 | public function setImportDir($dirs) { |
| 2076 | $this->importDir = (array)$dirs; |
| 2077 | } |
| 2078 | |
| 2079 | public function addImportDir($dir) { |
| 2080 | $this->importDir = (array)$this->importDir; |
| 2081 | $this->importDir[] = $dir; |
| 2082 | } |
| 2083 | |
| 2084 | public function allParsedFiles() { |
| 2085 | return $this->allParsedFiles; |
| 2086 | } |
| 2087 | |
| 2088 | public function addParsedFile($file) { |
| 2089 | $this->allParsedFiles[realpath($file)] = filemtime($file); |
| 2090 | } |
| 2091 | |
| 2092 | /** |
| 2093 | * Uses the current value of $this->count to show line and line number |
| 2094 | */ |
| 2095 | public function throwError($msg = null) { |
| 2096 | if ($this->sourceLoc >= 0) { |
| 2097 | $this->sourceParser->throwError($msg, $this->sourceLoc); |
| 2098 | } |
| 2099 | throw new exception($msg); |
| 2100 | } |
| 2101 | |
| 2102 | // compile file $in to file $out if $in is newer than $out |
| 2103 | // returns true when it compiles, false otherwise |
| 2104 | public static function ccompile($in, $out, $less = null) { |
| 2105 | if ($less === null) { |
| 2106 | $less = new self; |
| 2107 | } |
| 2108 | return $less->checkedCompile($in, $out); |
| 2109 | } |
| 2110 | |
| 2111 | public static function cexecute($in, $force = false, $less = null) { |
| 2112 | if ($less === null) { |
| 2113 | $less = new self; |
| 2114 | } |
| 2115 | return $less->cachedCompile($in, $force); |
| 2116 | } |
| 2117 | |
| 2118 | static protected $cssColors = array( |
| 2119 | 'aliceblue' => '240,248,255', |
| 2120 | 'antiquewhite' => '250,235,215', |
| 2121 | 'aqua' => '0,255,255', |
| 2122 | 'aquamarine' => '127,255,212', |
| 2123 | 'azure' => '240,255,255', |
| 2124 | 'beige' => '245,245,220', |
| 2125 | 'bisque' => '255,228,196', |
| 2126 | 'black' => '0,0,0', |
| 2127 | 'blanchedalmond' => '255,235,205', |
| 2128 | 'blue' => '0,0,255', |
| 2129 | 'blueviolet' => '138,43,226', |
| 2130 | 'brown' => '165,42,42', |
| 2131 | 'burlywood' => '222,184,135', |
| 2132 | 'cadetblue' => '95,158,160', |
| 2133 | 'chartreuse' => '127,255,0', |
| 2134 | 'chocolate' => '210,105,30', |
| 2135 | 'coral' => '255,127,80', |
| 2136 | 'cornflowerblue' => '100,149,237', |
| 2137 | 'cornsilk' => '255,248,220', |
| 2138 | 'crimson' => '220,20,60', |
| 2139 | 'cyan' => '0,255,255', |
| 2140 | 'darkblue' => '0,0,139', |
| 2141 | 'darkcyan' => '0,139,139', |
| 2142 | 'darkgoldenrod' => '184,134,11', |
| 2143 | 'darkgray' => '169,169,169', |
| 2144 | 'darkgreen' => '0,100,0', |
| 2145 | 'darkgrey' => '169,169,169', |
| 2146 | 'darkkhaki' => '189,183,107', |
| 2147 | 'darkmagenta' => '139,0,139', |
| 2148 | 'darkolivegreen' => '85,107,47', |
| 2149 | 'darkorange' => '255,140,0', |
| 2150 | 'darkorchid' => '153,50,204', |
| 2151 | 'darkred' => '139,0,0', |
| 2152 | 'darksalmon' => '233,150,122', |
| 2153 | 'darkseagreen' => '143,188,143', |
| 2154 | 'darkslateblue' => '72,61,139', |
| 2155 | 'darkslategray' => '47,79,79', |
| 2156 | 'darkslategrey' => '47,79,79', |
| 2157 | 'darkturquoise' => '0,206,209', |
| 2158 | 'darkviolet' => '148,0,211', |
| 2159 | 'deeppink' => '255,20,147', |
| 2160 | 'deepskyblue' => '0,191,255', |
| 2161 | 'dimgray' => '105,105,105', |
| 2162 | 'dimgrey' => '105,105,105', |
| 2163 | 'dodgerblue' => '30,144,255', |
| 2164 | 'firebrick' => '178,34,34', |
| 2165 | 'floralwhite' => '255,250,240', |
| 2166 | 'forestgreen' => '34,139,34', |
| 2167 | 'fuchsia' => '255,0,255', |
| 2168 | 'gainsboro' => '220,220,220', |
| 2169 | 'ghostwhite' => '248,248,255', |
| 2170 | 'gold' => '255,215,0', |
| 2171 | 'goldenrod' => '218,165,32', |
| 2172 | 'gray' => '128,128,128', |
| 2173 | 'green' => '0,128,0', |
| 2174 | 'greenyellow' => '173,255,47', |
| 2175 | 'grey' => '128,128,128', |
| 2176 | 'honeydew' => '240,255,240', |
| 2177 | 'hotpink' => '255,105,180', |
| 2178 | 'indianred' => '205,92,92', |
| 2179 | 'indigo' => '75,0,130', |
| 2180 | 'ivory' => '255,255,240', |
| 2181 | 'khaki' => '240,230,140', |
| 2182 | 'lavender' => '230,230,250', |
| 2183 | 'lavenderblush' => '255,240,245', |
| 2184 | 'lawngreen' => '124,252,0', |
| 2185 | 'lemonchiffon' => '255,250,205', |
| 2186 | 'lightblue' => '173,216,230', |
| 2187 | 'lightcoral' => '240,128,128', |
| 2188 | 'lightcyan' => '224,255,255', |
| 2189 | 'lightgoldenrodyellow' => '250,250,210', |
| 2190 | 'lightgray' => '211,211,211', |
| 2191 | 'lightgreen' => '144,238,144', |
| 2192 | 'lightgrey' => '211,211,211', |
| 2193 | 'lightpink' => '255,182,193', |
| 2194 | 'lightsalmon' => '255,160,122', |
| 2195 | 'lightseagreen' => '32,178,170', |
| 2196 | 'lightskyblue' => '135,206,250', |
| 2197 | 'lightslategray' => '119,136,153', |
| 2198 | 'lightslategrey' => '119,136,153', |
| 2199 | 'lightsteelblue' => '176,196,222', |
| 2200 | 'lightyellow' => '255,255,224', |
| 2201 | 'lime' => '0,255,0', |
| 2202 | 'limegreen' => '50,205,50', |
| 2203 | 'linen' => '250,240,230', |
| 2204 | 'magenta' => '255,0,255', |
| 2205 | 'maroon' => '128,0,0', |
| 2206 | 'mediumaquamarine' => '102,205,170', |
| 2207 | 'mediumblue' => '0,0,205', |
| 2208 | 'mediumorchid' => '186,85,211', |
| 2209 | 'mediumpurple' => '147,112,219', |
| 2210 | 'mediumseagreen' => '60,179,113', |
| 2211 | 'mediumslateblue' => '123,104,238', |
| 2212 | 'mediumspringgreen' => '0,250,154', |
| 2213 | 'mediumturquoise' => '72,209,204', |
| 2214 | 'mediumvioletred' => '199,21,133', |
| 2215 | 'midnightblue' => '25,25,112', |
| 2216 | 'mintcream' => '245,255,250', |
| 2217 | 'mistyrose' => '255,228,225', |
| 2218 | 'moccasin' => '255,228,181', |
| 2219 | 'navajowhite' => '255,222,173', |
| 2220 | 'navy' => '0,0,128', |
| 2221 | 'oldlace' => '253,245,230', |
| 2222 | 'olive' => '128,128,0', |
| 2223 | 'olivedrab' => '107,142,35', |
| 2224 | 'orange' => '255,165,0', |
| 2225 | 'orangered' => '255,69,0', |
| 2226 | 'orchid' => '218,112,214', |
| 2227 | 'palegoldenrod' => '238,232,170', |
| 2228 | 'palegreen' => '152,251,152', |
| 2229 | 'paleturquoise' => '175,238,238', |
| 2230 | 'palevioletred' => '219,112,147', |
| 2231 | 'papayawhip' => '255,239,213', |
| 2232 | 'peachpuff' => '255,218,185', |
| 2233 | 'peru' => '205,133,63', |
| 2234 | 'pink' => '255,192,203', |
| 2235 | 'plum' => '221,160,221', |
| 2236 | 'powderblue' => '176,224,230', |
| 2237 | 'purple' => '128,0,128', |
| 2238 | 'red' => '255,0,0', |
| 2239 | 'rosybrown' => '188,143,143', |
| 2240 | 'royalblue' => '65,105,225', |
| 2241 | 'saddlebrown' => '139,69,19', |
| 2242 | 'salmon' => '250,128,114', |
| 2243 | 'sandybrown' => '244,164,96', |
| 2244 | 'seagreen' => '46,139,87', |
| 2245 | 'seashell' => '255,245,238', |
| 2246 | 'sienna' => '160,82,45', |
| 2247 | 'silver' => '192,192,192', |
| 2248 | 'skyblue' => '135,206,235', |
| 2249 | 'slateblue' => '106,90,205', |
| 2250 | 'slategray' => '112,128,144', |
| 2251 | 'slategrey' => '112,128,144', |
| 2252 | 'snow' => '255,250,250', |
| 2253 | 'springgreen' => '0,255,127', |
| 2254 | 'steelblue' => '70,130,180', |
| 2255 | 'tan' => '210,180,140', |
| 2256 | 'teal' => '0,128,128', |
| 2257 | 'thistle' => '216,191,216', |
| 2258 | 'tomato' => '255,99,71', |
| 2259 | 'transparent' => '0,0,0,0', |
| 2260 | 'turquoise' => '64,224,208', |
| 2261 | 'violet' => '238,130,238', |
| 2262 | 'wheat' => '245,222,179', |
| 2263 | 'white' => '255,255,255', |
| 2264 | 'whitesmoke' => '245,245,245', |
| 2265 | 'yellow' => '255,255,0', |
| 2266 | 'yellowgreen' => '154,205,50' |
| 2267 | ); |
| 2268 | } |
| 2269 | |
| 2270 | // responsible for taking a string of LESS code and converting it into a |
| 2271 | // syntax tree |
| 2272 | class lessc_parser { |
| 2273 | static protected $nextBlockId = 0; // used to uniquely identify blocks |
| 2274 | |
| 2275 | static protected $precedence = array( |
| 2276 | '=<' => 0, |
| 2277 | '>=' => 0, |
| 2278 | '=' => 0, |
| 2279 | '<' => 0, |
| 2280 | '>' => 0, |
| 2281 | |
| 2282 | '+' => 1, |
| 2283 | '-' => 1, |
| 2284 | '*' => 2, |
| 2285 | '/' => 2, |
| 2286 | '%' => 2, |
| 2287 | ); |
| 2288 | |
| 2289 | static protected $whitePattern; |
| 2290 | static protected $commentMulti; |
| 2291 | |
| 2292 | static protected $commentSingle = "//"; |
| 2293 | static protected $commentMultiLeft = "/*"; |
| 2294 | static protected $commentMultiRight = "*/"; |
| 2295 | |
| 2296 | // regex string to match any of the operators |
| 2297 | static protected $operatorString; |
| 2298 | |
| 2299 | // these properties will supress division unless it's inside parenthases |
| 2300 | static protected $supressDivisionProps = |
| 2301 | array('/border-radius$/i', '/^font$/i'); |
| 2302 | |
| 2303 | protected $blockDirectives = array("font-face", "keyframes", "page", "-moz-document", "viewport", "-moz-viewport", "-o-viewport", "-ms-viewport"); |
| 2304 | protected $lineDirectives = array("charset"); |
| 2305 | |
| 2306 | /** |
| 2307 | * if we are in parens we can be more liberal with whitespace around |
| 2308 | * operators because it must evaluate to a single value and thus is less |
| 2309 | * ambiguous. |
| 2310 | * |
| 2311 | * Consider: |
| 2312 | * property1: 10 -5; // is two numbers, 10 and -5 |
| 2313 | * property2: (10 -5); // should evaluate to 5 |
| 2314 | */ |
| 2315 | protected $inParens = false; |
| 2316 | |
| 2317 | // caches preg escaped literals |
| 2318 | static protected $literalCache = array(); |
| 2319 | |
| 2320 | public function __construct($lessc, $sourceName = null) { |
| 2321 | $this->eatWhiteDefault = true; |
| 2322 | // reference to less needed for vPrefix, mPrefix, and parentSelector |
| 2323 | $this->lessc = $lessc; |
| 2324 | |
| 2325 | $this->sourceName = $sourceName; // name used for error messages |
| 2326 | |
| 2327 | $this->writeComments = false; |
| 2328 | |
| 2329 | if (!self::$operatorString) { |
| 2330 | self::$operatorString = |
| 2331 | '('.implode('|', array_map(array('lessc', 'preg_quote'), |
| 2332 | array_keys(self::$precedence))).')'; |
| 2333 | |
| 2334 | $commentSingle = lessc::preg_quote(self::$commentSingle); |
| 2335 | $commentMultiLeft = lessc::preg_quote(self::$commentMultiLeft); |
| 2336 | $commentMultiRight = lessc::preg_quote(self::$commentMultiRight); |
| 2337 | |
| 2338 | self::$commentMulti = $commentMultiLeft.'.*?'.$commentMultiRight; |
| 2339 | self::$whitePattern = '/'.$commentSingle.'[^\n]*\s*|('.self::$commentMulti.')\s*|\s+/Ais'; |
| 2340 | } |
| 2341 | } |
| 2342 | |
| 2343 | public function parse($buffer) { |
| 2344 | $this->count = 0; |
| 2345 | $this->line = 1; |
| 2346 | |
| 2347 | $this->env = null; // block stack |
| 2348 | $this->buffer = $this->writeComments ? $buffer : $this->removeComments($buffer); |
| 2349 | $this->pushSpecialBlock("root"); |
| 2350 | $this->eatWhiteDefault = true; |
| 2351 | $this->seenComments = array(); |
| 2352 | |
| 2353 | // trim whitespace on head |
| 2354 | // if (preg_match('/^\s+/', $this->buffer, $m)) { |
| 2355 | // $this->line += substr_count($m[0], "\n"); |
| 2356 | // $this->buffer = ltrim($this->buffer); |
| 2357 | // } |
| 2358 | $this->whitespace(); |
| 2359 | |
| 2360 | // parse the entire file |
| 2361 | while (false !== $this->parseChunk()); |
| 2362 | |
| 2363 | if ($this->count != strlen($this->buffer)) |
| 2364 | $this->throwError(); |
| 2365 | |
| 2366 | // TODO report where the block was opened |
| 2367 | if ( !property_exists($this->env, 'parent') || !is_null($this->env->parent) ) |
| 2368 | throw new exception('parse error: unclosed block'); |
| 2369 | |
| 2370 | return $this->env; |
| 2371 | } |
| 2372 | |
| 2373 | /** |
| 2374 | * Parse a single chunk off the head of the buffer and append it to the |
| 2375 | * current parse environment. |
| 2376 | * Returns false when the buffer is empty, or when there is an error. |
| 2377 | * |
| 2378 | * This function is called repeatedly until the entire document is |
| 2379 | * parsed. |
| 2380 | * |
| 2381 | * This parser is most similar to a recursive descent parser. Single |
| 2382 | * functions represent discrete grammatical rules for the language, and |
| 2383 | * they are able to capture the text that represents those rules. |
| 2384 | * |
| 2385 | * Consider the function lessc::keyword(). (all parse functions are |
| 2386 | * structured the same) |
| 2387 | * |
| 2388 | * The function takes a single reference argument. When calling the |
| 2389 | * function it will attempt to match a keyword on the head of the buffer. |
| 2390 | * If it is successful, it will place the keyword in the referenced |
| 2391 | * argument, advance the position in the buffer, and return true. If it |
| 2392 | * fails then it won't advance the buffer and it will return false. |
| 2393 | * |
| 2394 | * All of these parse functions are powered by lessc::match(), which behaves |
| 2395 | * the same way, but takes a literal regular expression. Sometimes it is |
| 2396 | * more convenient to use match instead of creating a new function. |
| 2397 | * |
| 2398 | * Because of the format of the functions, to parse an entire string of |
| 2399 | * grammatical rules, you can chain them together using &&. |
| 2400 | * |
| 2401 | * But, if some of the rules in the chain succeed before one fails, then |
| 2402 | * the buffer position will be left at an invalid state. In order to |
| 2403 | * avoid this, lessc::seek() is used to remember and set buffer positions. |
| 2404 | * |
| 2405 | * Before parsing a chain, use $s = $this->seek() to remember the current |
| 2406 | * position into $s. Then if a chain fails, use $this->seek($s) to |
| 2407 | * go back where we started. |
| 2408 | */ |
| 2409 | protected function parseChunk() { |
| 2410 | if (empty($this->buffer)) return false; |
| 2411 | $s = $this->seek(); |
| 2412 | |
| 2413 | if ($this->whitespace()) { |
| 2414 | return true; |
| 2415 | } |
| 2416 | |
| 2417 | // setting a property |
| 2418 | if ($this->keyword($key) && $this->assign() && |
| 2419 | $this->propertyValue($value, $key) && $this->end()) |
| 2420 | { |
| 2421 | $this->append(array('assign', $key, $value), $s); |
| 2422 | return true; |
| 2423 | } else { |
| 2424 | $this->seek($s); |
| 2425 | } |
| 2426 | |
| 2427 | |
| 2428 | // look for special css blocks |
| 2429 | if ($this->literal('@', false)) { |
| 2430 | $this->count--; |
| 2431 | |
| 2432 | // media |
| 2433 | if ($this->literal('@media')) { |
| 2434 | if (($this->mediaQueryList($mediaQueries) || true) |
| 2435 | && $this->literal('{')) |
| 2436 | { |
| 2437 | $media = $this->pushSpecialBlock("media"); |
| 2438 | $media->queries = is_null($mediaQueries) ? array() : $mediaQueries; |
| 2439 | return true; |
| 2440 | } else { |
| 2441 | $this->seek($s); |
| 2442 | return false; |
| 2443 | } |
| 2444 | } |
| 2445 | |
| 2446 | if ($this->literal("@", false) && $this->keyword($dirName)) { |
| 2447 | if ($this->isDirective($dirName, $this->blockDirectives)) { |
| 2448 | if (($this->openString("{", $dirValue, null, array(";")) || true) && |
| 2449 | $this->literal("{")) |
| 2450 | { |
| 2451 | $dir = $this->pushSpecialBlock("directive"); |
| 2452 | $dir->name = $dirName; |
| 2453 | if (isset($dirValue)) $dir->value = $dirValue; |
| 2454 | return true; |
| 2455 | } |
| 2456 | } elseif ($this->isDirective($dirName, $this->lineDirectives)) { |
| 2457 | if ($this->propertyValue($dirValue) && $this->end()) { |
| 2458 | $this->append(array("directive", $dirName, $dirValue)); |
| 2459 | return true; |
| 2460 | } |
| 2461 | } |
| 2462 | } |
| 2463 | |
| 2464 | $this->seek($s); |
| 2465 | } |
| 2466 | |
| 2467 | // setting a variable |
| 2468 | if ($this->variable($var) && $this->assign() && |
| 2469 | $this->propertyValue($value) && $this->end()) |
| 2470 | { |
| 2471 | $this->append(array('assign', $var, $value), $s); |
| 2472 | return true; |
| 2473 | } else { |
| 2474 | $this->seek($s); |
| 2475 | } |
| 2476 | |
| 2477 | if ($this->import($importValue)) { |
| 2478 | $this->append($importValue, $s); |
| 2479 | return true; |
| 2480 | } |
| 2481 | |
| 2482 | // opening parametric mixin |
| 2483 | if ($this->tag($tag, true) && $this->argumentDef($args, $isVararg) && |
| 2484 | ($this->guards($guards) || true) && |
| 2485 | $this->literal('{')) |
| 2486 | { |
| 2487 | $block = $this->pushBlock($this->fixTags(array($tag))); |
| 2488 | $block->args = $args; |
| 2489 | $block->isVararg = $isVararg; |
| 2490 | if (!empty($guards)) $block->guards = $guards; |
| 2491 | return true; |
| 2492 | } else { |
| 2493 | $this->seek($s); |
| 2494 | } |
| 2495 | |
| 2496 | // opening a simple block |
| 2497 | if ($this->tags($tags) && $this->literal('{', false)) { |
| 2498 | $tags = $this->fixTags($tags); |
| 2499 | $this->pushBlock($tags); |
| 2500 | return true; |
| 2501 | } else { |
| 2502 | $this->seek($s); |
| 2503 | } |
| 2504 | |
| 2505 | // closing a block |
| 2506 | if ($this->literal('}', false)) { |
| 2507 | try { |
| 2508 | $block = $this->pop(); |
| 2509 | } catch (exception $e) { |
| 2510 | $this->seek($s); |
| 2511 | $this->throwError($e->getMessage()); |
| 2512 | } |
| 2513 | |
| 2514 | $hidden = false; |
| 2515 | if (is_null($block->type)) { |
| 2516 | $hidden = true; |
| 2517 | if (!isset($block->args)) { |
| 2518 | foreach ($block->tags as $tag) { |
| 2519 | if (!is_string($tag) || $tag[0] != $this->lessc->mPrefix) { |
| 2520 | $hidden = false; |
| 2521 | break; |
| 2522 | } |
| 2523 | } |
| 2524 | } |
| 2525 | |
| 2526 | foreach ($block->tags as $tag) { |
| 2527 | if (is_string($tag)) { |
| 2528 | $this->env->children[$tag][] = $block; |
| 2529 | } |
| 2530 | } |
| 2531 | } |
| 2532 | |
| 2533 | if (!$hidden) { |
| 2534 | $this->append(array('block', $block), $s); |
| 2535 | } |
| 2536 | |
| 2537 | // this is done here so comments aren't bundled into he block that |
| 2538 | // was just closed |
| 2539 | $this->whitespace(); |
| 2540 | return true; |
| 2541 | } |
| 2542 | |
| 2543 | // mixin |
| 2544 | if ($this->mixinTags($tags) && |
| 2545 | ($this->argumentDef($argv, $isVararg) || true) && |
| 2546 | ($this->keyword($suffix) || true) && $this->end()) |
| 2547 | { |
| 2548 | $tags = $this->fixTags($tags); |
| 2549 | $this->append(array('mixin', $tags, $argv, $suffix), $s); |
| 2550 | return true; |
| 2551 | } else { |
| 2552 | $this->seek($s); |
| 2553 | } |
| 2554 | |
| 2555 | // spare ; |
| 2556 | if ($this->literal(';')) return true; |
| 2557 | |
| 2558 | return false; // got nothing, throw error |
| 2559 | } |
| 2560 | |
| 2561 | protected function isDirective($dirname, $directives) { |
| 2562 | // TODO: cache pattern in parser |
| 2563 | $pattern = implode("|", |
| 2564 | array_map(array("lessc", "preg_quote"), $directives)); |
| 2565 | $pattern = '/^(-[a-z-]+-)?(' . $pattern . ')$/i'; |
| 2566 | |
| 2567 | return preg_match($pattern, $dirname); |
| 2568 | } |
| 2569 | |
| 2570 | protected function fixTags($tags) { |
| 2571 | // move @ tags out of variable namespace |
| 2572 | foreach ($tags as &$tag) { |
| 2573 | if ($tag[0] == $this->lessc->vPrefix) |
| 2574 | $tag[0] = $this->lessc->mPrefix; |
| 2575 | } |
| 2576 | return $tags; |
| 2577 | } |
| 2578 | |
| 2579 | // a list of expressions |
| 2580 | protected function expressionList(&$exps) { |
| 2581 | $values = array(); |
| 2582 | |
| 2583 | while ($this->expression($exp)) { |
| 2584 | $values[] = $exp; |
| 2585 | } |
| 2586 | |
| 2587 | if (count($values) == 0) return false; |
| 2588 | |
| 2589 | $exps = lessc::compressList($values, ' '); |
| 2590 | return true; |
| 2591 | } |
| 2592 | |
| 2593 | /** |
| 2594 | * Attempt to consume an expression. |
| 2595 | * @link http://en.wikipedia.org/wiki/Operator-precedence_parser#Pseudo-code |
| 2596 | */ |
| 2597 | protected function expression(&$out) { |
| 2598 | if ($this->value($lhs)) { |
| 2599 | $out = $this->expHelper($lhs, 0); |
| 2600 | |
| 2601 | // look for / shorthand |
| 2602 | if (!empty($this->env->supressedDivision)) { |
| 2603 | unset($this->env->supressedDivision); |
| 2604 | $s = $this->seek(); |
| 2605 | if ($this->literal("/") && $this->value($rhs)) { |
| 2606 | $out = array("list", "", |
| 2607 | array($out, array("keyword", "/"), $rhs)); |
| 2608 | } else { |
| 2609 | $this->seek($s); |
| 2610 | } |
| 2611 | } |
| 2612 | |
| 2613 | return true; |
| 2614 | } |
| 2615 | return false; |
| 2616 | } |
| 2617 | |
| 2618 | /** |
| 2619 | * recursively parse infix equation with $lhs at precedence $minP |
| 2620 | */ |
| 2621 | protected function expHelper($lhs, $minP) { |
| 2622 | $this->inExp = true; |
| 2623 | $ss = $this->seek(); |
| 2624 | |
| 2625 | while (true) { |
| 2626 | $whiteBefore = isset($this->buffer[$this->count - 1]) && |
| 2627 | ctype_space($this->buffer[$this->count - 1]); |
| 2628 | |
| 2629 | // If there is whitespace before the operator, then we require |
| 2630 | // whitespace after the operator for it to be an expression |
| 2631 | $needWhite = $whiteBefore && !$this->inParens; |
| 2632 | |
| 2633 | if ($this->match(self::$operatorString.($needWhite ? '\s' : ''), $m) && self::$precedence[$m[1]] >= $minP) { |
| 2634 | if (!$this->inParens && isset($this->env->currentProperty) && $m[1] == "/" && empty($this->env->supressedDivision)) { |
| 2635 | foreach (self::$supressDivisionProps as $pattern) { |
| 2636 | if (preg_match($pattern, $this->env->currentProperty)) { |
| 2637 | $this->env->supressedDivision = true; |
| 2638 | break 2; |
| 2639 | } |
| 2640 | } |
| 2641 | } |
| 2642 | |
| 2643 | |
| 2644 | $whiteAfter = isset($this->buffer[$this->count - 1]) && |
| 2645 | ctype_space($this->buffer[$this->count - 1]); |
| 2646 | |
| 2647 | if (!$this->value($rhs)) break; |
| 2648 | |
| 2649 | // peek for next operator to see what to do with rhs |
| 2650 | if ($this->peek(self::$operatorString, $next) && self::$precedence[$next[1]] > self::$precedence[$m[1]]) { |
| 2651 | $rhs = $this->expHelper($rhs, self::$precedence[$next[1]]); |
| 2652 | } |
| 2653 | |
| 2654 | $lhs = array('expression', $m[1], $lhs, $rhs, $whiteBefore, $whiteAfter); |
| 2655 | $ss = $this->seek(); |
| 2656 | |
| 2657 | continue; |
| 2658 | } |
| 2659 | |
| 2660 | break; |
| 2661 | } |
| 2662 | |
| 2663 | $this->seek($ss); |
| 2664 | |
| 2665 | return $lhs; |
| 2666 | } |
| 2667 | |
| 2668 | // consume a list of values for a property |
| 2669 | public function propertyValue(&$value, $keyName = null) { |
| 2670 | $values = array(); |
| 2671 | |
| 2672 | if ($keyName !== null) $this->env->currentProperty = $keyName; |
| 2673 | |
| 2674 | $s = null; |
| 2675 | while ($this->expressionList($v)) { |
| 2676 | $values[] = $v; |
| 2677 | $s = $this->seek(); |
| 2678 | if (!$this->literal(',')) break; |
| 2679 | } |
| 2680 | |
| 2681 | if ($s) $this->seek($s); |
| 2682 | |
| 2683 | if ($keyName !== null) unset($this->env->currentProperty); |
| 2684 | |
| 2685 | if (count($values) == 0) return false; |
| 2686 | |
| 2687 | $value = lessc::compressList($values, ', '); |
| 2688 | return true; |
| 2689 | } |
| 2690 | |
| 2691 | protected function parenValue(&$out) { |
| 2692 | $s = $this->seek(); |
| 2693 | |
| 2694 | // speed shortcut |
| 2695 | if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "(") { |
| 2696 | return false; |
| 2697 | } |
| 2698 | |
| 2699 | $inParens = $this->inParens; |
| 2700 | if ($this->literal("(") && |
| 2701 | ($this->inParens = true) && $this->expression($exp) && |
| 2702 | $this->literal(")")) |
| 2703 | { |
| 2704 | $out = $exp; |
| 2705 | $this->inParens = $inParens; |
| 2706 | return true; |
| 2707 | } else { |
| 2708 | $this->inParens = $inParens; |
| 2709 | $this->seek($s); |
| 2710 | } |
| 2711 | |
| 2712 | return false; |
| 2713 | } |
| 2714 | |
| 2715 | // a single value |
| 2716 | protected function value(&$value) { |
| 2717 | $s = $this->seek(); |
| 2718 | |
| 2719 | // speed shortcut |
| 2720 | if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "-") { |
| 2721 | // negation |
| 2722 | if ($this->literal("-", false) && |
| 2723 | (($this->variable($inner) && $inner = array("variable", $inner)) || |
| 2724 | $this->unit($inner) || |
| 2725 | $this->parenValue($inner))) |
| 2726 | { |
| 2727 | $value = array("unary", "-", $inner); |
| 2728 | return true; |
| 2729 | } else { |
| 2730 | $this->seek($s); |
| 2731 | } |
| 2732 | } |
| 2733 | |
| 2734 | if ($this->parenValue($value)) return true; |
| 2735 | if ($this->unit($value)) return true; |
| 2736 | if ($this->color($value)) return true; |
| 2737 | if ($this->func($value)) return true; |
| 2738 | if ($this->string($value)) return true; |
| 2739 | |
| 2740 | if ($this->keyword($word)) { |
| 2741 | $value = array('keyword', $word); |
| 2742 | return true; |
| 2743 | } |
| 2744 | |
| 2745 | // try a variable |
| 2746 | if ($this->variable($var)) { |
| 2747 | $value = array('variable', $var); |
| 2748 | return true; |
| 2749 | } |
| 2750 | |
| 2751 | // unquote string (should this work on any type? |
| 2752 | if ($this->literal("~") && $this->string($str)) { |
| 2753 | $value = array("escape", $str); |
| 2754 | return true; |
| 2755 | } else { |
| 2756 | $this->seek($s); |
| 2757 | } |
| 2758 | |
| 2759 | // css hack: \0 |
| 2760 | if ($this->literal('\\') && $this->match('([0-9]+)', $m)) { |
| 2761 | $value = array('keyword', '\\'.$m[1]); |
| 2762 | return true; |
| 2763 | } else { |
| 2764 | $this->seek($s); |
| 2765 | } |
| 2766 | |
| 2767 | return false; |
| 2768 | } |
| 2769 | |
| 2770 | // an import statement |
| 2771 | protected function import(&$out) { |
| 2772 | if (!$this->literal('@import')) return false; |
| 2773 | |
| 2774 | // @import "something.css" media; |
| 2775 | // @import url("something.css") media; |
| 2776 | // @import url(something.css) media; |
| 2777 | |
| 2778 | if ($this->propertyValue($value)) { |
| 2779 | $out = array("import", $value); |
| 2780 | return true; |
| 2781 | } |
| 2782 | } |
| 2783 | |
| 2784 | protected function mediaQueryList(&$out) { |
| 2785 | if ($this->genericList($list, "mediaQuery", ",", false)) { |
| 2786 | $out = $list[2]; |
| 2787 | return true; |
| 2788 | } |
| 2789 | return false; |
| 2790 | } |
| 2791 | |
| 2792 | protected function mediaQuery(&$out) { |
| 2793 | $s = $this->seek(); |
| 2794 | |
| 2795 | $expressions = null; |
| 2796 | $parts = array(); |
| 2797 | |
| 2798 | if (($this->literal("only") && ($only = true) || $this->literal("not") && ($not = true) || true) && $this->keyword($mediaType)) { |
| 2799 | $prop = array("mediaType"); |
| 2800 | if (isset($only)) $prop[] = "only"; |
| 2801 | if (isset($not)) $prop[] = "not"; |
| 2802 | $prop[] = $mediaType; |
| 2803 | $parts[] = $prop; |
| 2804 | } else { |
| 2805 | $this->seek($s); |
| 2806 | } |
| 2807 | |
| 2808 | |
| 2809 | if (!empty($mediaType) && !$this->literal("and")) { |
| 2810 | // ~ |
| 2811 | } else { |
| 2812 | $this->genericList($expressions, "mediaExpression", "and", false); |
| 2813 | if (is_array($expressions)) $parts = array_merge($parts, $expressions[2]); |
| 2814 | } |
| 2815 | |
| 2816 | if (count($parts) == 0) { |
| 2817 | $this->seek($s); |
| 2818 | return false; |
| 2819 | } |
| 2820 | |
| 2821 | $out = $parts; |
| 2822 | return true; |
| 2823 | } |
| 2824 | |
| 2825 | protected function mediaExpression(&$out) { |
| 2826 | $s = $this->seek(); |
| 2827 | $value = null; |
| 2828 | if ($this->literal("(") && |
| 2829 | $this->keyword($feature) && |
| 2830 | ($this->literal(":") && $this->expression($value) || true) && |
| 2831 | $this->literal(")")) |
| 2832 | { |
| 2833 | $out = array("mediaExp", $feature); |
| 2834 | if ($value) $out[] = $value; |
| 2835 | return true; |
| 2836 | } elseif ($this->variable($variable)) { |
| 2837 | $out = array('variable', $variable); |
| 2838 | return true; |
| 2839 | } |
| 2840 | |
| 2841 | $this->seek($s); |
| 2842 | return false; |
| 2843 | } |
| 2844 | |
| 2845 | // an unbounded string stopped by $end |
| 2846 | protected function openString($end, &$out, $nestingOpen=null, $rejectStrs = null) { |
| 2847 | $oldWhite = $this->eatWhiteDefault; |
| 2848 | $this->eatWhiteDefault = false; |
| 2849 | |
| 2850 | $stop = array("'", '"', "@{", $end); |
| 2851 | $stop = array_map(array("lessc", "preg_quote"), $stop); |
| 2852 | // $stop[] = self::$commentMulti; |
| 2853 | |
| 2854 | if (!is_null($rejectStrs)) { |
| 2855 | $stop = array_merge($stop, $rejectStrs); |
| 2856 | } |
| 2857 | |
| 2858 | $patt = '(.*?)('.implode("|", $stop).')'; |
| 2859 | |
| 2860 | $nestingLevel = 0; |
| 2861 | |
| 2862 | $content = array(); |
| 2863 | while ($this->match($patt, $m, false)) { |
| 2864 | if (!empty($m[1])) { |
| 2865 | $content[] = $m[1]; |
| 2866 | if ($nestingOpen) { |
| 2867 | $nestingLevel += substr_count($m[1], $nestingOpen); |
| 2868 | } |
| 2869 | } |
| 2870 | |
| 2871 | $tok = $m[2]; |
| 2872 | |
| 2873 | $this->count-= strlen($tok); |
| 2874 | if ($tok == $end) { |
| 2875 | if ($nestingLevel == 0) { |
| 2876 | break; |
| 2877 | } else { |
| 2878 | $nestingLevel--; |
| 2879 | } |
| 2880 | } |
| 2881 | |
| 2882 | if (($tok == "'" || $tok == '"') && $this->string($str)) { |
| 2883 | $content[] = $str; |
| 2884 | continue; |
| 2885 | } |
| 2886 | |
| 2887 | if ($tok == "@{" && $this->interpolation($inter)) { |
| 2888 | $content[] = $inter; |
| 2889 | continue; |
| 2890 | } |
| 2891 | |
| 2892 | if (!empty($rejectStrs) && in_array($tok, $rejectStrs)) { |
| 2893 | break; |
| 2894 | } |
| 2895 | |
| 2896 | $content[] = $tok; |
| 2897 | $this->count+= strlen($tok); |
| 2898 | } |
| 2899 | |
| 2900 | $this->eatWhiteDefault = $oldWhite; |
| 2901 | |
| 2902 | if (count($content) == 0) return false; |
| 2903 | |
| 2904 | // trim the end |
| 2905 | if (is_string(end($content))) { |
| 2906 | $content[count($content) - 1] = rtrim(end($content)); |
| 2907 | } |
| 2908 | |
| 2909 | $out = array("string", "", $content); |
| 2910 | return true; |
| 2911 | } |
| 2912 | |
| 2913 | protected function string(&$out) { |
| 2914 | $s = $this->seek(); |
| 2915 | if ($this->literal('"', false)) { |
| 2916 | $delim = '"'; |
| 2917 | } elseif ($this->literal("'", false)) { |
| 2918 | $delim = "'"; |
| 2919 | } else { |
| 2920 | return false; |
| 2921 | } |
| 2922 | |
| 2923 | $content = array(); |
| 2924 | |
| 2925 | // look for either ending delim , escape, or string interpolation |
| 2926 | $patt = '([^\n]*?)(@\{|\\\\|' . |
| 2927 | lessc::preg_quote($delim).')'; |
| 2928 | |
| 2929 | $oldWhite = $this->eatWhiteDefault; |
| 2930 | $this->eatWhiteDefault = false; |
| 2931 | |
| 2932 | while ($this->match($patt, $m, false)) { |
| 2933 | $content[] = $m[1]; |
| 2934 | if ($m[2] == "@{") { |
| 2935 | $this->count -= strlen($m[2]); |
| 2936 | if ($this->interpolation($inter, false)) { |
| 2937 | $content[] = $inter; |
| 2938 | } else { |
| 2939 | $this->count += strlen($m[2]); |
| 2940 | $content[] = "@{"; // ignore it |
| 2941 | } |
| 2942 | } elseif ($m[2] == '\\') { |
| 2943 | $content[] = $m[2]; |
| 2944 | if ($this->literal($delim, false)) { |
| 2945 | $content[] = $delim; |
| 2946 | } |
| 2947 | } else { |
| 2948 | $this->count -= strlen($delim); |
| 2949 | break; // delim |
| 2950 | } |
| 2951 | } |
| 2952 | |
| 2953 | $this->eatWhiteDefault = $oldWhite; |
| 2954 | |
| 2955 | if ($this->literal($delim)) { |
| 2956 | $out = array("string", $delim, $content); |
| 2957 | return true; |
| 2958 | } |
| 2959 | |
| 2960 | $this->seek($s); |
| 2961 | return false; |
| 2962 | } |
| 2963 | |
| 2964 | protected function interpolation(&$out) { |
| 2965 | $oldWhite = $this->eatWhiteDefault; |
| 2966 | $this->eatWhiteDefault = true; |
| 2967 | |
| 2968 | $s = $this->seek(); |
| 2969 | if ($this->literal("@{") && |
| 2970 | $this->openString("}", $interp, null, array("'", '"', ";")) && |
| 2971 | $this->literal("}", false)) |
| 2972 | { |
| 2973 | $out = array("interpolate", $interp); |
| 2974 | $this->eatWhiteDefault = $oldWhite; |
| 2975 | if ($this->eatWhiteDefault) $this->whitespace(); |
| 2976 | return true; |
| 2977 | } |
| 2978 | |
| 2979 | $this->eatWhiteDefault = $oldWhite; |
| 2980 | $this->seek($s); |
| 2981 | return false; |
| 2982 | } |
| 2983 | |
| 2984 | protected function unit(&$unit) { |
| 2985 | // speed shortcut |
| 2986 | if (isset($this->buffer[$this->count])) { |
| 2987 | $char = $this->buffer[$this->count]; |
| 2988 | if (!ctype_digit($char) && $char != ".") return false; |
| 2989 | } |
| 2990 | |
| 2991 | if ($this->match('([0-9]+(?:\.[0-9]*)?|\.[0-9]+)([%a-zA-Z]+)?', $m)) { |
| 2992 | $unit = array("number", $m[1], empty($m[2]) ? "" : $m[2]); |
| 2993 | return true; |
| 2994 | } |
| 2995 | return false; |
| 2996 | } |
| 2997 | |
| 2998 | // a # color |
| 2999 | protected function color(&$out) { |
| 3000 | if ($this->match('(#(?:[0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{3}))', $m)) { |
| 3001 | if (strlen($m[1]) > 7) { |
| 3002 | $out = array("string", "", array($m[1])); |
| 3003 | } else { |
| 3004 | $out = array("raw_color", $m[1]); |
| 3005 | } |
| 3006 | return true; |
| 3007 | } |
| 3008 | |
| 3009 | return false; |
| 3010 | } |
| 3011 | |
| 3012 | // consume an argument definition list surrounded by () |
| 3013 | // each argument is a variable name with optional value |
| 3014 | // or at the end a ... or a variable named followed by ... |
| 3015 | // arguments are separated by , unless a ; is in the list, then ; is the |
| 3016 | // delimiter. |
| 3017 | protected function argumentDef(&$args, &$isVararg) { |
| 3018 | $s = $this->seek(); |
| 3019 | if (!$this->literal('(')) return false; |
| 3020 | |
| 3021 | $values = array(); |
| 3022 | $delim = ","; |
| 3023 | $method = "expressionList"; |
| 3024 | |
| 3025 | $isVararg = false; |
| 3026 | while (true) { |
| 3027 | if ($this->literal("...")) { |
| 3028 | $isVararg = true; |
| 3029 | break; |
| 3030 | } |
| 3031 | |
| 3032 | if ($this->$method($value)) { |
| 3033 | if ($value[0] == "variable") { |
| 3034 | $arg = array("arg", $value[1]); |
| 3035 | $ss = $this->seek(); |
| 3036 | |
| 3037 | if ($this->assign() && $this->$method($rhs)) { |
| 3038 | $arg[] = $rhs; |
| 3039 | } else { |
| 3040 | $this->seek($ss); |
| 3041 | if ($this->literal("...")) { |
| 3042 | $arg[0] = "rest"; |
| 3043 | $isVararg = true; |
| 3044 | } |
| 3045 | } |
| 3046 | |
| 3047 | $values[] = $arg; |
| 3048 | if ($isVararg) break; |
| 3049 | continue; |
| 3050 | } else { |
| 3051 | $values[] = array("lit", $value); |
| 3052 | } |
| 3053 | } |
| 3054 | |
| 3055 | |
| 3056 | if (!$this->literal($delim)) { |
| 3057 | if ($delim == "," && $this->literal(";")) { |
| 3058 | // found new delim, convert existing args |
| 3059 | $delim = ";"; |
| 3060 | $method = "propertyValue"; |
| 3061 | |
| 3062 | // transform arg list |
| 3063 | if (isset($values[1])) { // 2 items |
| 3064 | $newList = array(); |
| 3065 | foreach ($values as $i => $arg) { |
| 3066 | switch($arg[0]) { |
| 3067 | case "arg": |
| 3068 | if ($i) { |
| 3069 | $this->throwError("Cannot mix ; and , as delimiter types"); |
| 3070 | } |
| 3071 | $newList[] = $arg[2]; |
| 3072 | break; |
| 3073 | case "lit": |
| 3074 | $newList[] = $arg[1]; |
| 3075 | break; |
| 3076 | case "rest": |
| 3077 | $this->throwError("Unexpected rest before semicolon"); |
| 3078 | } |
| 3079 | } |
| 3080 | |
| 3081 | $newList = array("list", ", ", $newList); |
| 3082 | |
| 3083 | switch ($values[0][0]) { |
| 3084 | case "arg": |
| 3085 | $newArg = array("arg", $values[0][1], $newList); |
| 3086 | break; |
| 3087 | case "lit": |
| 3088 | $newArg = array("lit", $newList); |
| 3089 | break; |
| 3090 | } |
| 3091 | |
| 3092 | } elseif ($values) { // 1 item |
| 3093 | $newArg = $values[0]; |
| 3094 | } |
| 3095 | |
| 3096 | if ($newArg) { |
| 3097 | $values = array($newArg); |
| 3098 | } |
| 3099 | } else { |
| 3100 | break; |
| 3101 | } |
| 3102 | } |
| 3103 | } |
| 3104 | |
| 3105 | if (!$this->literal(')')) { |
| 3106 | $this->seek($s); |
| 3107 | return false; |
| 3108 | } |
| 3109 | |
| 3110 | $args = $values; |
| 3111 | |
| 3112 | return true; |
| 3113 | } |
| 3114 | |
| 3115 | // consume a list of tags |
| 3116 | // this accepts a hanging delimiter |
| 3117 | protected function tags(&$tags, $simple = false, $delim = ',') { |
| 3118 | $tags = array(); |
| 3119 | while ($this->tag($tt, $simple)) { |
| 3120 | $tags[] = $tt; |
| 3121 | if (!$this->literal($delim)) break; |
| 3122 | } |
| 3123 | if (count($tags) == 0) return false; |
| 3124 | |
| 3125 | return true; |
| 3126 | } |
| 3127 | |
| 3128 | // list of tags of specifying mixin path |
| 3129 | // optionally separated by > (lazy, accepts extra >) |
| 3130 | protected function mixinTags(&$tags) { |
| 3131 | $tags = array(); |
| 3132 | while ($this->tag($tt, true)) { |
| 3133 | $tags[] = $tt; |
| 3134 | $this->literal(">"); |
| 3135 | } |
| 3136 | |
| 3137 | if (count($tags) == 0) return false; |
| 3138 | |
| 3139 | return true; |
| 3140 | } |
| 3141 | |
| 3142 | // a bracketed value (contained within in a tag definition) |
| 3143 | protected function tagBracket(&$parts, &$hasExpression) { |
| 3144 | // speed shortcut |
| 3145 | if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "[") { |
| 3146 | return false; |
| 3147 | } |
| 3148 | |
| 3149 | $s = $this->seek(); |
| 3150 | |
| 3151 | $hasInterpolation = false; |
| 3152 | |
| 3153 | if ($this->literal("[", false)) { |
| 3154 | $attrParts = array("["); |
| 3155 | // keyword, string, operator |
| 3156 | while (true) { |
| 3157 | if ($this->literal("]", false)) { |
| 3158 | $this->count--; |
| 3159 | break; // get out early |
| 3160 | } |
| 3161 | |
| 3162 | if ($this->match('\s+', $m)) { |
| 3163 | $attrParts[] = " "; |
| 3164 | continue; |
| 3165 | } |
| 3166 | if ($this->string($str)) { |
| 3167 | // escape parent selector, (yuck) |
| 3168 | foreach ($str[2] as &$chunk) { |
| 3169 | $chunk = str_replace($this->lessc->parentSelector, "$&$", $chunk); |
| 3170 | } |
| 3171 | |
| 3172 | $attrParts[] = $str; |
| 3173 | $hasInterpolation = true; |
| 3174 | continue; |
| 3175 | } |
| 3176 | |
| 3177 | if ($this->keyword($word)) { |
| 3178 | $attrParts[] = $word; |
| 3179 | continue; |
| 3180 | } |
| 3181 | |
| 3182 | if ($this->interpolation($inter, false)) { |
| 3183 | $attrParts[] = $inter; |
| 3184 | $hasInterpolation = true; |
| 3185 | continue; |
| 3186 | } |
| 3187 | |
| 3188 | // operator, handles attr namespace too |
| 3189 | if ($this->match('[|-~\$\*\^=]+', $m)) { |
| 3190 | $attrParts[] = $m[0]; |
| 3191 | continue; |
| 3192 | } |
| 3193 | |
| 3194 | break; |
| 3195 | } |
| 3196 | |
| 3197 | if ($this->literal("]", false)) { |
| 3198 | $attrParts[] = "]"; |
| 3199 | foreach ($attrParts as $part) { |
| 3200 | $parts[] = $part; |
| 3201 | } |
| 3202 | $hasExpression = $hasExpression || $hasInterpolation; |
| 3203 | return true; |
| 3204 | } |
| 3205 | $this->seek($s); |
| 3206 | } |
| 3207 | |
| 3208 | $this->seek($s); |
| 3209 | return false; |
| 3210 | } |
| 3211 | |
| 3212 | // a space separated list of selectors |
| 3213 | protected function tag(&$tag, $simple = false) { |
| 3214 | if ($simple) |
| 3215 | $chars = '^@,:;{}\][>\(\) "\''; |
| 3216 | else |
| 3217 | $chars = '^@,;{}["\''; |
| 3218 | |
| 3219 | $s = $this->seek(); |
| 3220 | |
| 3221 | $hasExpression = false; |
| 3222 | $parts = array(); |
| 3223 | while ($this->tagBracket($parts, $hasExpression)); |
| 3224 | |
| 3225 | $oldWhite = $this->eatWhiteDefault; |
| 3226 | $this->eatWhiteDefault = false; |
| 3227 | |
| 3228 | while (true) { |
| 3229 | if ($this->match('(['.$chars.'0-9]['.$chars.']*)', $m)) { |
| 3230 | $parts[] = $m[1]; |
| 3231 | if ($simple) break; |
| 3232 | |
| 3233 | while ($this->tagBracket($parts, $hasExpression)); |
| 3234 | continue; |
| 3235 | } |
| 3236 | |
| 3237 | if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "@") { |
| 3238 | if ($this->interpolation($interp)) { |
| 3239 | $hasExpression = true; |
| 3240 | $interp[2] = true; // don't unescape |
| 3241 | $parts[] = $interp; |
| 3242 | continue; |
| 3243 | } |
| 3244 | |
| 3245 | if ($this->literal("@")) { |
| 3246 | $parts[] = "@"; |
| 3247 | continue; |
| 3248 | } |
| 3249 | } |
| 3250 | |
| 3251 | if ($this->unit($unit)) { // for keyframes |
| 3252 | $parts[] = $unit[1]; |
| 3253 | $parts[] = $unit[2]; |
| 3254 | continue; |
| 3255 | } |
| 3256 | |
| 3257 | break; |
| 3258 | } |
| 3259 | |
| 3260 | $this->eatWhiteDefault = $oldWhite; |
| 3261 | if (!$parts) { |
| 3262 | $this->seek($s); |
| 3263 | return false; |
| 3264 | } |
| 3265 | |
| 3266 | if ($hasExpression) { |
| 3267 | $tag = array("exp", array("string", "", $parts)); |
| 3268 | } else { |
| 3269 | $tag = trim(implode($parts)); |
| 3270 | } |
| 3271 | |
| 3272 | $this->whitespace(); |
| 3273 | return true; |
| 3274 | } |
| 3275 | |
| 3276 | // a css function |
| 3277 | protected function func(&$func) { |
| 3278 | $s = $this->seek(); |
| 3279 | |
| 3280 | if ($this->match('(%|[\w\-_][\w\-_:\.]+|[\w_])', $m) && $this->literal('(')) { |
| 3281 | $fname = $m[1]; |
| 3282 | |
| 3283 | $sPreArgs = $this->seek(); |
| 3284 | |
| 3285 | $args = array(); |
| 3286 | while (true) { |
| 3287 | $ss = $this->seek(); |
| 3288 | // this ugly nonsense is for ie filter properties |
| 3289 | if ($this->keyword($name) && $this->literal('=') && $this->expressionList($value)) { |
| 3290 | $args[] = array("string", "", array($name, "=", $value)); |
| 3291 | } else { |
| 3292 | $this->seek($ss); |
| 3293 | if ($this->expressionList($value)) { |
| 3294 | $args[] = $value; |
| 3295 | } |
| 3296 | } |
| 3297 | |
| 3298 | if (!$this->literal(',')) break; |
| 3299 | } |
| 3300 | $args = array('list', ',', $args); |
| 3301 | |
| 3302 | if ($this->literal(')')) { |
| 3303 | $func = array('function', $fname, $args); |
| 3304 | return true; |
| 3305 | } elseif ($fname == 'url') { |
| 3306 | // couldn't parse and in url? treat as string |
| 3307 | $this->seek($sPreArgs); |
| 3308 | if ($this->openString(")", $string) && $this->literal(")")) { |
| 3309 | $func = array('function', $fname, $string); |
| 3310 | return true; |
| 3311 | } |
| 3312 | } |
| 3313 | } |
| 3314 | |
| 3315 | $this->seek($s); |
| 3316 | return false; |
| 3317 | } |
| 3318 | |
| 3319 | // consume a less variable |
| 3320 | protected function variable(&$name) { |
| 3321 | $s = $this->seek(); |
| 3322 | if ($this->literal($this->lessc->vPrefix, false) && |
| 3323 | ($this->variable($sub) || $this->keyword($name))) |
| 3324 | { |
| 3325 | if (!empty($sub)) { |
| 3326 | $name = array('variable', $sub); |
| 3327 | } else { |
| 3328 | $name = $this->lessc->vPrefix.$name; |
| 3329 | } |
| 3330 | return true; |
| 3331 | } |
| 3332 | |
| 3333 | $name = null; |
| 3334 | $this->seek($s); |
| 3335 | return false; |
| 3336 | } |
| 3337 | |
| 3338 | /** |
| 3339 | * Consume an assignment operator |
| 3340 | * Can optionally take a name that will be set to the current property name |
| 3341 | */ |
| 3342 | protected function assign($name = null) { |
| 3343 | if ($name) $this->currentProperty = $name; |
| 3344 | return $this->literal(':') || $this->literal('='); |
| 3345 | } |
| 3346 | |
| 3347 | // consume a keyword |
| 3348 | protected function keyword(&$word) { |
| 3349 | if ($this->match('([\w_\-\*!"][\w\-_"]*)', $m)) { |
| 3350 | $word = $m[1]; |
| 3351 | return true; |
| 3352 | } |
| 3353 | return false; |
| 3354 | } |
| 3355 | |
| 3356 | // consume an end of statement delimiter |
| 3357 | protected function end() { |
| 3358 | if ($this->literal(';', false)) { |
| 3359 | return true; |
| 3360 | } elseif ($this->count == strlen($this->buffer) || $this->buffer[$this->count] == '}') { |
| 3361 | // if there is end of file or a closing block next then we don't need a ; |
| 3362 | return true; |
| 3363 | } |
| 3364 | return false; |
| 3365 | } |
| 3366 | |
| 3367 | protected function guards(&$guards) { |
| 3368 | $s = $this->seek(); |
| 3369 | |
| 3370 | if (!$this->literal("when")) { |
| 3371 | $this->seek($s); |
| 3372 | return false; |
| 3373 | } |
| 3374 | |
| 3375 | $guards = array(); |
| 3376 | |
| 3377 | while ($this->guardGroup($g)) { |
| 3378 | $guards[] = $g; |
| 3379 | if (!$this->literal(",")) break; |
| 3380 | } |
| 3381 | |
| 3382 | if (count($guards) == 0) { |
| 3383 | $guards = null; |
| 3384 | $this->seek($s); |
| 3385 | return false; |
| 3386 | } |
| 3387 | |
| 3388 | return true; |
| 3389 | } |
| 3390 | |
| 3391 | // a bunch of guards that are and'd together |
| 3392 | // TODO rename to guardGroup |
| 3393 | protected function guardGroup(&$guardGroup) { |
| 3394 | $s = $this->seek(); |
| 3395 | $guardGroup = array(); |
| 3396 | while ($this->guard($guard)) { |
| 3397 | $guardGroup[] = $guard; |
| 3398 | if (!$this->literal("and")) break; |
| 3399 | } |
| 3400 | |
| 3401 | if (count($guardGroup) == 0) { |
| 3402 | $guardGroup = null; |
| 3403 | $this->seek($s); |
| 3404 | return false; |
| 3405 | } |
| 3406 | |
| 3407 | return true; |
| 3408 | } |
| 3409 | |
| 3410 | protected function guard(&$guard) { |
| 3411 | $s = $this->seek(); |
| 3412 | $negate = $this->literal("not"); |
| 3413 | |
| 3414 | if ($this->literal("(") && $this->expression($exp) && $this->literal(")")) { |
| 3415 | $guard = $exp; |
| 3416 | if ($negate) $guard = array("negate", $guard); |
| 3417 | return true; |
| 3418 | } |
| 3419 | |
| 3420 | $this->seek($s); |
| 3421 | return false; |
| 3422 | } |
| 3423 | |
| 3424 | /* raw parsing functions */ |
| 3425 | |
| 3426 | protected function literal($what, $eatWhitespace = null) { |
| 3427 | if ($eatWhitespace === null) $eatWhitespace = $this->eatWhiteDefault; |
| 3428 | |
| 3429 | // shortcut on single letter |
| 3430 | if (!isset($what[1]) && isset($this->buffer[$this->count])) { |
| 3431 | if ($this->buffer[$this->count] == $what) { |
| 3432 | if (!$eatWhitespace) { |
| 3433 | $this->count++; |
| 3434 | return true; |
| 3435 | } |
| 3436 | // goes below... |
| 3437 | } else { |
| 3438 | return false; |
| 3439 | } |
| 3440 | } |
| 3441 | |
| 3442 | if (!isset(self::$literalCache[$what])) { |
| 3443 | self::$literalCache[$what] = lessc::preg_quote($what); |
| 3444 | } |
| 3445 | |
| 3446 | return $this->match(self::$literalCache[$what], $m, $eatWhitespace); |
| 3447 | } |
| 3448 | |
| 3449 | protected function genericList(&$out, $parseItem, $delim="", $flatten=true) { |
| 3450 | $s = $this->seek(); |
| 3451 | $items = array(); |
| 3452 | while ($this->$parseItem($value)) { |
| 3453 | $items[] = $value; |
| 3454 | if ($delim) { |
| 3455 | if (!$this->literal($delim)) break; |
| 3456 | } |
| 3457 | } |
| 3458 | |
| 3459 | if (count($items) == 0) { |
| 3460 | $this->seek($s); |
| 3461 | return false; |
| 3462 | } |
| 3463 | |
| 3464 | if ($flatten && count($items) == 1) { |
| 3465 | $out = $items[0]; |
| 3466 | } else { |
| 3467 | $out = array("list", $delim, $items); |
| 3468 | } |
| 3469 | |
| 3470 | return true; |
| 3471 | } |
| 3472 | |
| 3473 | |
| 3474 | // advance counter to next occurrence of $what |
| 3475 | // $until - don't include $what in advance |
| 3476 | // $allowNewline, if string, will be used as valid char set |
| 3477 | protected function to($what, &$out, $until = false, $allowNewline = false) { |
| 3478 | if (is_string($allowNewline)) { |
| 3479 | $validChars = $allowNewline; |
| 3480 | } else { |
| 3481 | $validChars = $allowNewline ? "." : "[^\n]"; |
| 3482 | } |
| 3483 | if (!$this->match('('.$validChars.'*?)'.lessc::preg_quote($what), $m, !$until)) return false; |
| 3484 | if ($until) $this->count -= strlen($what); // give back $what |
| 3485 | $out = $m[1]; |
| 3486 | return true; |
| 3487 | } |
| 3488 | |
| 3489 | // try to match something on head of buffer |
| 3490 | protected function match($regex, &$out, $eatWhitespace = null) { |
| 3491 | if ($eatWhitespace === null) $eatWhitespace = $this->eatWhiteDefault; |
| 3492 | |
| 3493 | $r = '/'.$regex.($eatWhitespace && !$this->writeComments ? '\s*' : '').'/Ais'; |
| 3494 | if (preg_match($r, $this->buffer, $out, null, $this->count)) { |
| 3495 | $this->count += strlen($out[0]); |
| 3496 | if ($eatWhitespace && $this->writeComments) $this->whitespace(); |
| 3497 | return true; |
| 3498 | } |
| 3499 | return false; |
| 3500 | } |
| 3501 | |
| 3502 | // match some whitespace |
| 3503 | protected function whitespace() { |
| 3504 | if ($this->writeComments) { |
| 3505 | $gotWhite = false; |
| 3506 | while (preg_match(self::$whitePattern, $this->buffer, $m, null, $this->count)) { |
| 3507 | if (isset($m[1]) && empty($this->seenComments[$this->count])) { |
| 3508 | $this->append(array("comment", $m[1])); |
| 3509 | $this->seenComments[$this->count] = true; |
| 3510 | } |
| 3511 | $this->count += strlen($m[0]); |
| 3512 | $gotWhite = true; |
| 3513 | } |
| 3514 | return $gotWhite; |
| 3515 | } else { |
| 3516 | $this->match("", $m); |
| 3517 | return strlen($m[0]) > 0; |
| 3518 | } |
| 3519 | } |
| 3520 | |
| 3521 | // match something without consuming it |
| 3522 | protected function peek($regex, &$out = null, $from=null) { |
| 3523 | if (is_null($from)) $from = $this->count; |
| 3524 | $r = '/'.$regex.'/Ais'; |
| 3525 | $result = preg_match($r, $this->buffer, $out, null, $from); |
| 3526 | |
| 3527 | return $result; |
| 3528 | } |
| 3529 | |
| 3530 | // seek to a spot in the buffer or return where we are on no argument |
| 3531 | protected function seek($where = null) { |
| 3532 | if ($where === null) return $this->count; |
| 3533 | else $this->count = $where; |
| 3534 | return true; |
| 3535 | } |
| 3536 | |
| 3537 | /* misc functions */ |
| 3538 | |
| 3539 | public function throwError($msg = "parse error", $count = null) { |
| 3540 | $count = is_null($count) ? $this->count : $count; |
| 3541 | |
| 3542 | $line = $this->line + |
| 3543 | substr_count(substr($this->buffer, 0, $count), "\n"); |
| 3544 | |
| 3545 | if (!empty($this->sourceName)) { |
| 3546 | $loc = "$this->sourceName on line $line"; |
| 3547 | } else { |
| 3548 | $loc = "line: $line"; |
| 3549 | } |
| 3550 | |
| 3551 | // TODO this depends on $this->count |
| 3552 | if ($this->peek("(.*?)(\n|$)", $m, $count)) { |
| 3553 | throw new exception("$msg: failed at `$m[1]` $loc"); |
| 3554 | } else { |
| 3555 | throw new exception("$msg: $loc"); |
| 3556 | } |
| 3557 | } |
| 3558 | |
| 3559 | protected function pushBlock($selectors=null, $type=null) { |
| 3560 | $b = new stdclass; |
| 3561 | $b->parent = $this->env; |
| 3562 | |
| 3563 | $b->type = $type; |
| 3564 | $b->id = self::$nextBlockId++; |
| 3565 | |
| 3566 | $b->isVararg = false; // TODO: kill me from here |
| 3567 | $b->tags = $selectors; |
| 3568 | |
| 3569 | $b->props = array(); |
| 3570 | $b->children = array(); |
| 3571 | |
| 3572 | $this->env = $b; |
| 3573 | return $b; |
| 3574 | } |
| 3575 | |
| 3576 | // push a block that doesn't multiply tags |
| 3577 | protected function pushSpecialBlock($type) { |
| 3578 | return $this->pushBlock(null, $type); |
| 3579 | } |
| 3580 | |
| 3581 | // append a property to the current block |
| 3582 | protected function append($prop, $pos = null) { |
| 3583 | if ($pos !== null) $prop[-1] = $pos; |
| 3584 | $this->env->props[] = $prop; |
| 3585 | } |
| 3586 | |
| 3587 | // pop something off the stack |
| 3588 | protected function pop() { |
| 3589 | $old = $this->env; |
| 3590 | $this->env = $this->env->parent; |
| 3591 | return $old; |
| 3592 | } |
| 3593 | |
| 3594 | // remove comments from $text |
| 3595 | // todo: make it work for all functions, not just url |
| 3596 | protected function removeComments($text) { |
| 3597 | $look = array( |
| 3598 | 'url(', '//', '/*', '"', "'" |
| 3599 | ); |
| 3600 | |
| 3601 | $out = ''; |
| 3602 | $min = null; |
| 3603 | while (true) { |
| 3604 | // find the next item |
| 3605 | foreach ($look as $token) { |
| 3606 | $pos = strpos($text, $token); |
| 3607 | if ($pos !== false) { |
| 3608 | if (!isset($min) || $pos < $min[1]) $min = array($token, $pos); |
| 3609 | } |
| 3610 | } |
| 3611 | |
| 3612 | if (is_null($min)) break; |
| 3613 | |
| 3614 | $count = $min[1]; |
| 3615 | $skip = 0; |
| 3616 | $newlines = 0; |
| 3617 | switch ($min[0]) { |
| 3618 | case 'url(': |
| 3619 | if (preg_match('/url\(.*?\)/', $text, $m, 0, $count)) |
| 3620 | $count += strlen($m[0]) - strlen($min[0]); |
| 3621 | break; |
| 3622 | case '"': |
| 3623 | case "'": |
| 3624 | if (preg_match('/'.$min[0].'.*?(?<!\\\\)'.$min[0].'/', $text, $m, 0, $count)) |
| 3625 | $count += strlen($m[0]) - 1; |
| 3626 | break; |
| 3627 | case '//': |
| 3628 | $skip = strpos($text, "\n", $count); |
| 3629 | if ($skip === false) $skip = strlen($text) - $count; |
| 3630 | else $skip -= $count; |
| 3631 | break; |
| 3632 | case '/*': |
| 3633 | if (preg_match('/\/\*.*?\*\//s', $text, $m, 0, $count)) { |
| 3634 | $skip = strlen($m[0]); |
| 3635 | $newlines = substr_count($m[0], "\n"); |
| 3636 | } |
| 3637 | break; |
| 3638 | } |
| 3639 | |
| 3640 | if ($skip == 0) $count += strlen($min[0]); |
| 3641 | |
| 3642 | $out .= substr($text, 0, $count).str_repeat("\n", $newlines); |
| 3643 | $text = substr($text, $count + $skip); |
| 3644 | |
| 3645 | $min = null; |
| 3646 | } |
| 3647 | |
| 3648 | return $out.$text; |
| 3649 | } |
| 3650 | |
| 3651 | } |
| 3652 | |
| 3653 | class lessc_formatter_classic { |
| 3654 | public $indentChar = " "; |
| 3655 | |
| 3656 | public $break = "\n"; |
| 3657 | public $open = " {"; |
| 3658 | public $close = "}"; |
| 3659 | public $selectorSeparator = ", "; |
| 3660 | public $assignSeparator = ":"; |
| 3661 | |
| 3662 | public $openSingle = " { "; |
| 3663 | public $closeSingle = " }"; |
| 3664 | |
| 3665 | public $disableSingle = false; |
| 3666 | public $breakSelectors = false; |
| 3667 | |
| 3668 | public $compressColors = false; |
| 3669 | |
| 3670 | public function __construct() { |
| 3671 | $this->indentLevel = 0; |
| 3672 | } |
| 3673 | |
| 3674 | public function indentStr($n = 0) { |
| 3675 | return str_repeat($this->indentChar, max($this->indentLevel + $n, 0)); |
| 3676 | } |
| 3677 | |
| 3678 | public function property($name, $value) { |
| 3679 | return $name . $this->assignSeparator . $value . ";"; |
| 3680 | } |
| 3681 | |
| 3682 | protected function isEmpty($block) { |
| 3683 | if (empty($block->lines)) { |
| 3684 | foreach ($block->children as $child) { |
| 3685 | if (!$this->isEmpty($child)) return false; |
| 3686 | } |
| 3687 | |
| 3688 | return true; |
| 3689 | } |
| 3690 | return false; |
| 3691 | } |
| 3692 | |
| 3693 | public function block($block) { |
| 3694 | if ($this->isEmpty($block)) return; |
| 3695 | |
| 3696 | $inner = $pre = $this->indentStr(); |
| 3697 | |
| 3698 | $isSingle = !$this->disableSingle && |
| 3699 | is_null($block->type) && count($block->lines) == 1; |
| 3700 | |
| 3701 | if (!empty($block->selectors)) { |
| 3702 | $this->indentLevel++; |
| 3703 | |
| 3704 | if ($this->breakSelectors) { |
| 3705 | $selectorSeparator = $this->selectorSeparator . $this->break . $pre; |
| 3706 | } else { |
| 3707 | $selectorSeparator = $this->selectorSeparator; |
| 3708 | } |
| 3709 | |
| 3710 | echo $pre . |
| 3711 | implode($selectorSeparator, $block->selectors); |
| 3712 | if ($isSingle) { |
| 3713 | echo $this->openSingle; |
| 3714 | $inner = ""; |
| 3715 | } else { |
| 3716 | echo $this->open . $this->break; |
| 3717 | $inner = $this->indentStr(); |
| 3718 | } |
| 3719 | |
| 3720 | } |
| 3721 | |
| 3722 | if (!empty($block->lines)) { |
| 3723 | $glue = $this->break.$inner; |
| 3724 | echo $inner . implode($glue, $block->lines); |
| 3725 | if (!$isSingle && !empty($block->children)) { |
| 3726 | echo $this->break; |
| 3727 | } |
| 3728 | } |
| 3729 | |
| 3730 | foreach ($block->children as $child) { |
| 3731 | $this->block($child); |
| 3732 | } |
| 3733 | |
| 3734 | if (!empty($block->selectors)) { |
| 3735 | if (!$isSingle && empty($block->children)) echo $this->break; |
| 3736 | |
| 3737 | if ($isSingle) { |
| 3738 | echo $this->closeSingle . $this->break; |
| 3739 | } else { |
| 3740 | echo $pre . $this->close . $this->break; |
| 3741 | } |
| 3742 | |
| 3743 | $this->indentLevel--; |
| 3744 | } |
| 3745 | } |
| 3746 | } |
| 3747 | |
| 3748 | class lessc_formatter_compressed extends lessc_formatter_classic { |
| 3749 | public $disableSingle = true; |
| 3750 | public $open = "{"; |
| 3751 | public $selectorSeparator = ","; |
| 3752 | public $assignSeparator = ":"; |
| 3753 | public $break = ""; |
| 3754 | public $compressColors = true; |
| 3755 | |
| 3756 | public function indentStr($n = 0) { |
| 3757 | return ""; |
| 3758 | } |
| 3759 | } |
| 3760 | |
| 3761 | class lessc_formatter_lessjs extends lessc_formatter_classic { |
| 3762 | public $disableSingle = true; |
| 3763 | public $breakSelectors = true; |
| 3764 | public $assignSeparator = ": "; |
| 3765 | public $selectorSeparator = ","; |
| 3766 | } |
| 3767 | |
| 3768 | |
| 3769 |