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Diffstat (limited to 'vendor/leafo/lessphp/lessc.inc.php')
| -rw-r--r-- | vendor/leafo/lessphp/lessc.inc.php | 3768 |
1 files changed, 0 insertions, 3768 deletions
diff --git a/vendor/leafo/lessphp/lessc.inc.php b/vendor/leafo/lessphp/lessc.inc.php deleted file mode 100644 index 2292f219..00000000 --- a/vendor/leafo/lessphp/lessc.inc.php +++ /dev/null @@ -1,3768 +0,0 @@ -<?php - -/** - * lessphp v0.5.0 - * http://leafo.net/lessphp - * - * LESS CSS compiler, adapted from http://lesscss.org - * - * Copyright 2013, Leaf Corcoran <leafot@gmail.com> - * Licensed under MIT or GPLv3, see LICENSE - */ - - -/** - * The LESS compiler and parser. - * - * Converting LESS to CSS is a three stage process. The incoming file is parsed - * by `lessc_parser` into a syntax tree, then it is compiled into another tree - * representing the CSS structure by `lessc`. The CSS tree is fed into a - * formatter, like `lessc_formatter` which then outputs CSS as a string. - * - * During the first compile, all values are *reduced*, which means that their - * types are brought to the lowest form before being dump as strings. This - * handles math equations, variable dereferences, and the like. - * - * The `parse` function of `lessc` is the entry point. - * - * In summary: - * - * The `lessc` class creates an instance of the parser, feeds it LESS code, - * then transforms the resulting tree to a CSS tree. This class also holds the - * evaluation context, such as all available mixins and variables at any given - * time. - * - * The `lessc_parser` class is only concerned with parsing its input. - * - * The `lessc_formatter` takes a CSS tree, and dumps it to a formatted string, - * handling things like indentation. - */ -class lessc { - static public $VERSION = "v0.5.0"; - - static public $TRUE = array("keyword", "true"); - static public $FALSE = array("keyword", "false"); - - protected $libFunctions = array(); - protected $registeredVars = array(); - protected $preserveComments = false; - - public $vPrefix = '@'; // prefix of abstract properties - public $mPrefix = '$'; // prefix of abstract blocks - public $parentSelector = '&'; - - public $importDisabled = false; - public $importDir = ''; - - protected $numberPrecision = null; - - protected $allParsedFiles = array(); - - // set to the parser that generated the current line when compiling - // so we know how to create error messages - protected $sourceParser = null; - protected $sourceLoc = null; - - static protected $nextImportId = 0; // uniquely identify imports - - // attempts to find the path of an import url, returns null for css files - protected function findImport($url) { - foreach ((array)$this->importDir as $dir) { - $full = $dir.(substr($dir, -1) != '/' ? '/' : '').$url; - if ($this->fileExists($file = $full.'.less') || $this->fileExists($file = $full)) { - return $file; - } - } - - return null; - } - - protected function fileExists($name) { - return is_file($name); - } - - static public function compressList($items, $delim) { - if (!isset($items[1]) && isset($items[0])) return $items[0]; - else return array('list', $delim, $items); - } - - static public function preg_quote($what) { - return preg_quote($what, '/'); - } - - protected function tryImport($importPath, $parentBlock, $out) { - if ($importPath[0] == "function" && $importPath[1] == "url") { - $importPath = $this->flattenList($importPath[2]); - } - - $str = $this->coerceString($importPath); - if ($str === null) return false; - - $url = $this->compileValue($this->lib_e($str)); - - // don't import if it ends in css - if (substr_compare($url, '.css', -4, 4) === 0) return false; - - $realPath = $this->findImport($url); - - if ($realPath === null) return false; - - if ($this->importDisabled) { - return array(false, "/* import disabled */"); - } - - if (isset($this->allParsedFiles[realpath($realPath)])) { - return array(false, null); - } - - $this->addParsedFile($realPath); - $parser = $this->makeParser($realPath); - $root = $parser->parse(file_get_contents($realPath)); - - // set the parents of all the block props - foreach ($root->props as $prop) { - if ($prop[0] == "block") { - $prop[1]->parent = $parentBlock; - } - } - - // copy mixins into scope, set their parents - // bring blocks from import into current block - // TODO: need to mark the source parser these came from this file - foreach ($root->children as $childName => $child) { - if (isset($parentBlock->children[$childName])) { - $parentBlock->children[$childName] = array_merge( - $parentBlock->children[$childName], - $child); - } else { - $parentBlock->children[$childName] = $child; - } - } - - $pi = pathinfo($realPath); - $dir = $pi["dirname"]; - - list($top, $bottom) = $this->sortProps($root->props, true); - $this->compileImportedProps($top, $parentBlock, $out, $parser, $dir); - - return array(true, $bottom, $parser, $dir); - } - - protected function compileImportedProps($props, $block, $out, $sourceParser, $importDir) { - $oldSourceParser = $this->sourceParser; - - $oldImport = $this->importDir; - - // TODO: this is because the importDir api is stupid - $this->importDir = (array)$this->importDir; - array_unshift($this->importDir, $importDir); - - foreach ($props as $prop) { - $this->compileProp($prop, $block, $out); - } - - $this->importDir = $oldImport; - $this->sourceParser = $oldSourceParser; - } - - /** - * Recursively compiles a block. - * - * A block is analogous to a CSS block in most cases. A single LESS document - * is encapsulated in a block when parsed, but it does not have parent tags - * so all of it's children appear on the root level when compiled. - * - * Blocks are made up of props and children. - * - * Props are property instructions, array tuples which describe an action - * to be taken, eg. write a property, set a variable, mixin a block. - * - * The children of a block are just all the blocks that are defined within. - * This is used to look up mixins when performing a mixin. - * - * Compiling the block involves pushing a fresh environment on the stack, - * and iterating through the props, compiling each one. - * - * See lessc::compileProp() - * - */ - protected function compileBlock($block) { - switch ($block->type) { - case "root": - $this->compileRoot($block); - break; - case null: - $this->compileCSSBlock($block); - break; - case "media": - $this->compileMedia($block); - break; - case "directive": - $name = "@" . $block->name; - if (!empty($block->value)) { - $name .= " " . $this->compileValue($this->reduce($block->value)); - } - - $this->compileNestedBlock($block, array($name)); - break; - default: - $this->throwError("unknown block type: $block->type\n"); - } - } - - protected function compileCSSBlock($block) { - $env = $this->pushEnv(); - - $selectors = $this->compileSelectors($block->tags); - $env->selectors = $this->multiplySelectors($selectors); - $out = $this->makeOutputBlock(null, $env->selectors); - - $this->scope->children[] = $out; - $this->compileProps($block, $out); - - $block->scope = $env; // mixins carry scope with them! - $this->popEnv(); - } - - protected function compileMedia($media) { - $env = $this->pushEnv($media); - $parentScope = $this->mediaParent($this->scope); - - $query = $this->compileMediaQuery($this->multiplyMedia($env)); - - $this->scope = $this->makeOutputBlock($media->type, array($query)); - $parentScope->children[] = $this->scope; - - $this->compileProps($media, $this->scope); - - if (count($this->scope->lines) > 0) { - $orphanSelelectors = $this->findClosestSelectors(); - if (!is_null($orphanSelelectors)) { - $orphan = $this->makeOutputBlock(null, $orphanSelelectors); - $orphan->lines = $this->scope->lines; - array_unshift($this->scope->children, $orphan); - $this->scope->lines = array(); - } - } - - $this->scope = $this->scope->parent; - $this->popEnv(); - } - - protected function mediaParent($scope) { - while (!empty($scope->parent)) { - if (!empty($scope->type) && $scope->type != "media") { - break; - } - $scope = $scope->parent; - } - - return $scope; - } - - protected function compileNestedBlock($block, $selectors) { - $this->pushEnv($block); - $this->scope = $this->makeOutputBlock($block->type, $selectors); - $this->scope->parent->children[] = $this->scope; - - $this->compileProps($block, $this->scope); - - $this->scope = $this->scope->parent; - $this->popEnv(); - } - - protected function compileRoot($root) { - $this->pushEnv(); - $this->scope = $this->makeOutputBlock($root->type); - $this->compileProps($root, $this->scope); - $this->popEnv(); - } - - protected function compileProps($block, $out) { - foreach ($this->sortProps($block->props) as $prop) { - $this->compileProp($prop, $block, $out); - } - $out->lines = $this->deduplicate($out->lines); - } - - /** - * Deduplicate lines in a block. Comments are not deduplicated. If a - * duplicate rule is detected, the comments immediately preceding each - * occurence are consolidated. - */ - protected function deduplicate($lines) { - $unique = array(); - $comments = array(); - - foreach($lines as $line) { - if (strpos($line, '/*') === 0) { - $comments[] = $line; - continue; - } - if (!in_array($line, $unique)) { - $unique[] = $line; - } - array_splice($unique, array_search($line, $unique), 0, $comments); - $comments = array(); - } - return array_merge($unique, $comments); - } - - protected function sortProps($props, $split = false) { - $vars = array(); - $imports = array(); - $other = array(); - $stack = array(); - - foreach ($props as $prop) { - switch ($prop[0]) { - case "comment": - $stack[] = $prop; - break; - case "assign": - $stack[] = $prop; - if (isset($prop[1][0]) && $prop[1][0] == $this->vPrefix) { - $vars = array_merge($vars, $stack); - } else { - $other = array_merge($other, $stack); - } - $stack = array(); - break; - case "import": - $id = self::$nextImportId++; - $prop[] = $id; - $stack[] = $prop; - $imports = array_merge($imports, $stack); - $other[] = array("import_mixin", $id); - $stack = array(); - break; - default: - $stack[] = $prop; - $other = array_merge($other, $stack); - $stack = array(); - break; - } - } - $other = array_merge($other, $stack); - - if ($split) { - return array(array_merge($imports, $vars), $other); - } else { - return array_merge($imports, $vars, $other); - } - } - - protected function compileMediaQuery($queries) { - $compiledQueries = array(); - foreach ($queries as $query) { - $parts = array(); - foreach ($query as $q) { - switch ($q[0]) { - case "mediaType": - $parts[] = implode(" ", array_slice($q, 1)); - break; - case "mediaExp": - if (isset($q[2])) { - $parts[] = "($q[1]: " . - $this->compileValue($this->reduce($q[2])) . ")"; - } else { - $parts[] = "($q[1])"; - } - break; - case "variable": - $parts[] = $this->compileValue($this->reduce($q)); - break; - } - } - - if (count($parts) > 0) { - $compiledQueries[] = implode(" and ", $parts); - } - } - - $out = "@media"; - if (!empty($parts)) { - $out .= " " . - implode($this->formatter->selectorSeparator, $compiledQueries); - } - return $out; - } - - protected function multiplyMedia($env, $childQueries = null) { - if (is_null($env) || - !empty($env->block->type) && $env->block->type != "media") - { - return $childQueries; - } - - // plain old block, skip - if (empty($env->block->type)) { - return $this->multiplyMedia($env->parent, $childQueries); - } - - $out = array(); - $queries = $env->block->queries; - if (is_null($childQueries)) { - $out = $queries; - } else { - foreach ($queries as $parent) { - foreach ($childQueries as $child) { - $out[] = array_merge($parent, $child); - } - } - } - - return $this->multiplyMedia($env->parent, $out); - } - - protected function expandParentSelectors(&$tag, $replace) { - $parts = explode("$&$", $tag); - $count = 0; - foreach ($parts as &$part) { - $part = str_replace($this->parentSelector, $replace, $part, $c); - $count += $c; - } - $tag = implode($this->parentSelector, $parts); - return $count; - } - - protected function findClosestSelectors() { - $env = $this->env; - $selectors = null; - while ($env !== null) { - if (isset($env->selectors)) { - $selectors = $env->selectors; - break; - } - $env = $env->parent; - } - - return $selectors; - } - - - // multiply $selectors against the nearest selectors in env - protected function multiplySelectors($selectors) { - // find parent selectors - - $parentSelectors = $this->findClosestSelectors(); - if (is_null($parentSelectors)) { - // kill parent reference in top level selector - foreach ($selectors as &$s) { - $this->expandParentSelectors($s, ""); - } - - return $selectors; - } - - $out = array(); - foreach ($parentSelectors as $parent) { - foreach ($selectors as $child) { - $count = $this->expandParentSelectors($child, $parent); - - // don't prepend the parent tag if & was used - if ($count > 0) { - $out[] = trim($child); - } else { - $out[] = trim($parent . ' ' . $child); - } - } - } - - return $out; - } - - // reduces selector expressions - protected function compileSelectors($selectors) { - $out = array(); - - foreach ($selectors as $s) { - if (is_array($s)) { - list(, $value) = $s; - $out[] = trim($this->compileValue($this->reduce($value))); - } else { - $out[] = $s; - } - } - - return $out; - } - - protected function eq($left, $right) { - return $left == $right; - } - - protected function patternMatch($block, $orderedArgs, $keywordArgs) { - // match the guards if it has them - // any one of the groups must have all its guards pass for a match - if (!empty($block->guards)) { - $groupPassed = false; - foreach ($block->guards as $guardGroup) { - foreach ($guardGroup as $guard) { - $this->pushEnv(); - $this->zipSetArgs($block->args, $orderedArgs, $keywordArgs); - - $negate = false; - if ($guard[0] == "negate") { - $guard = $guard[1]; - $negate = true; - } - - $passed = $this->reduce($guard) == self::$TRUE; - if ($negate) $passed = !$passed; - - $this->popEnv(); - - if ($passed) { - $groupPassed = true; - } else { - $groupPassed = false; - break; - } - } - - if ($groupPassed) break; - } - - if (!$groupPassed) { - return false; - } - } - - if (empty($block->args)) { - return $block->isVararg || empty($orderedArgs) && empty($keywordArgs); - } - - $remainingArgs = $block->args; - if ($keywordArgs) { - $remainingArgs = array(); - foreach ($block->args as $arg) { - if ($arg[0] == "arg" && isset($keywordArgs[$arg[1]])) { - continue; - } - - $remainingArgs[] = $arg; - } - } - - $i = -1; // no args - // try to match by arity or by argument literal - foreach ($remainingArgs as $i => $arg) { - switch ($arg[0]) { - case "lit": - if (empty($orderedArgs[$i]) || !$this->eq($arg[1], $orderedArgs[$i])) { - return false; - } - break; - case "arg": - // no arg and no default value - if (!isset($orderedArgs[$i]) && !isset($arg[2])) { - return false; - } - break; - case "rest": - $i--; // rest can be empty - break 2; - } - } - - if ($block->isVararg) { - return true; // not having enough is handled above - } else { - $numMatched = $i + 1; - // greater than becuase default values always match - return $numMatched >= count($orderedArgs); - } - } - - protected function patternMatchAll($blocks, $orderedArgs, $keywordArgs, $skip=array()) { - $matches = null; - foreach ($blocks as $block) { - // skip seen blocks that don't have arguments - if (isset($skip[$block->id]) && !isset($block->args)) { - continue; - } - - if ($this->patternMatch($block, $orderedArgs, $keywordArgs)) { - $matches[] = $block; - } - } - - return $matches; - } - - // attempt to find blocks matched by path and args - protected function findBlocks($searchIn, $path, $orderedArgs, $keywordArgs, $seen=array()) { - if ($searchIn == null) return null; - if (isset($seen[$searchIn->id])) return null; - $seen[$searchIn->id] = true; - - $name = $path[0]; - - if (isset($searchIn->children[$name])) { - $blocks = $searchIn->children[$name]; - if (count($path) == 1) { - $matches = $this->patternMatchAll($blocks, $orderedArgs, $keywordArgs, $seen); - if (!empty($matches)) { - // This will return all blocks that match in the closest - // scope that has any matching block, like lessjs - return $matches; - } - } else { - $matches = array(); - foreach ($blocks as $subBlock) { - $subMatches = $this->findBlocks($subBlock, - array_slice($path, 1), $orderedArgs, $keywordArgs, $seen); - - if (!is_null($subMatches)) { - foreach ($subMatches as $sm) { - $matches[] = $sm; - } - } - } - - return count($matches) > 0 ? $matches : null; - } - } - if ($searchIn->parent === $searchIn) return null; - return $this->findBlocks($searchIn->parent, $path, $orderedArgs, $keywordArgs, $seen); - } - - // sets all argument names in $args to either the default value - // or the one passed in through $values - protected function zipSetArgs($args, $orderedValues, $keywordValues) { - $assignedValues = array(); - - $i = 0; - foreach ($args as $a) { - if ($a[0] == "arg") { - if (isset($keywordValues[$a[1]])) { - // has keyword arg - $value = $keywordValues[$a[1]]; - } elseif (isset($orderedValues[$i])) { - // has ordered arg - $value = $orderedValues[$i]; - $i++; - } elseif (isset($a[2])) { - // has default value - $value = $a[2]; - } else { - $this->throwError("Failed to assign arg " . $a[1]); - $value = null; // :( - } - - $value = $this->reduce($value); - $this->set($a[1], $value); - $assignedValues[] = $value; - } else { - // a lit - $i++; - } - } - - // check for a rest - $last = end($args); - if ($last[0] == "rest") { - $rest = array_slice($orderedValues, count($args) - 1); - $this->set($last[1], $this->reduce(array("list", " ", $rest))); - } - - // wow is this the only true use of PHP's + operator for arrays? - $this->env->arguments = $assignedValues + $orderedValues; - } - - // compile a prop and update $lines or $blocks appropriately - protected function compileProp($prop, $block, $out) { - // set error position context - $this->sourceLoc = isset($prop[-1]) ? $prop[-1] : -1; - - switch ($prop[0]) { - case 'assign': - list(, $name, $value) = $prop; - if ($name[0] == $this->vPrefix) { - $this->set($name, $value); - } else { - $out->lines[] = $this->formatter->property($name, - $this->compileValue($this->reduce($value))); - } - break; - case 'block': - list(, $child) = $prop; - $this->compileBlock($child); - break; - case 'mixin': - list(, $path, $args, $suffix) = $prop; - - $orderedArgs = array(); - $keywordArgs = array(); - foreach ((array)$args as $arg) { - $argval = null; - switch ($arg[0]) { - case "arg": - if (!isset($arg[2])) { - $orderedArgs[] = $this->reduce(array("variable", $arg[1])); - } else { - $keywordArgs[$arg[1]] = $this->reduce($arg[2]); - } - break; - - case "lit": - $orderedArgs[] = $this->reduce($arg[1]); - break; - default: - $this->throwError("Unknown arg type: " . $arg[0]); - } - } - - $mixins = $this->findBlocks($block, $path, $orderedArgs, $keywordArgs); - - if ($mixins === null) { - $this->throwError("{$prop[1][0]} is undefined"); - } - - foreach ($mixins as $mixin) { - if ($mixin === $block && !$orderedArgs) { - continue; - } - - $haveScope = false; - if (isset($mixin->parent->scope)) { - $haveScope = true; - $mixinParentEnv = $this->pushEnv(); - $mixinParentEnv->storeParent = $mixin->parent->scope; - } - - $haveArgs = false; - if (isset($mixin->args)) { - $haveArgs = true; - $this->pushEnv(); - $this->zipSetArgs($mixin->args, $orderedArgs, $keywordArgs); - } - - $oldParent = $mixin->parent; - if ($mixin != $block) $mixin->parent = $block; - - foreach ($this->sortProps($mixin->props) as $subProp) { - if ($suffix !== null && - $subProp[0] == "assign" && - is_string($subProp[1]) && - $subProp[1]{0} != $this->vPrefix) - { - $subProp[2] = array( - 'list', ' ', - array($subProp[2], array('keyword', $suffix)) - ); - } - - $this->compileProp($subProp, $mixin, $out); - } - - $mixin->parent = $oldParent; - - if ($haveArgs) $this->popEnv(); - if ($haveScope) $this->popEnv(); - } - - break; - case 'raw': - $out->lines[] = $prop[1]; - break; - case "directive": - list(, $name, $value) = $prop; - $out->lines[] = "@$name " . $this->compileValue($this->reduce($value)).';'; - break; - case "comment": - $out->lines[] = $prop[1]; - break; - case "import"; - list(, $importPath, $importId) = $prop; - $importPath = $this->reduce($importPath); - - if (!isset($this->env->imports)) { - $this->env->imports = array(); - } - - $result = $this->tryImport($importPath, $block, $out); - - $this->env->imports[$importId] = $result === false ? - array(false, "@import " . $this->compileValue($importPath).";") : - $result; - - break; - case "import_mixin": - list(,$importId) = $prop; - $import = $this->env->imports[$importId]; - if ($import[0] === false) { - if (isset($import[1])) { - $out->lines[] = $import[1]; - } - } else { - list(, $bottom, $parser, $importDir) = $import; - $this->compileImportedProps($bottom, $block, $out, $parser, $importDir); - } - - break; - default: - $this->throwError("unknown op: {$prop[0]}\n"); - } - } - - - /** - * Compiles a primitive value into a CSS property value. - * - * Values in lessphp are typed by being wrapped in arrays, their format is - * typically: - * - * array(type, contents [, additional_contents]*) - * - * The input is expected to be reduced. This function will not work on - * things like expressions and variables. - */ - public function compileValue($value) { - switch ($value[0]) { - case 'list': - // [1] - delimiter - // [2] - array of values - return implode($value[1], array_map(array($this, 'compileValue'), $value[2])); - case 'raw_color': - if (!empty($this->formatter->compressColors)) { - return $this->compileValue($this->coerceColor($value)); - } - return $value[1]; - case 'keyword': - // [1] - the keyword - return $value[1]; - case 'number': - list(, $num, $unit) = $value; - // [1] - the number - // [2] - the unit - if ($this->numberPrecision !== null) { - $num = round($num, $this->numberPrecision); - } - return $num . $unit; - case 'string': - // [1] - contents of string (includes quotes) - list(, $delim, $content) = $value; - foreach ($content as &$part) { - if (is_array($part)) { - $part = $this->compileValue($part); - } - } - return $delim . implode($content) . $delim; - case 'color': - // [1] - red component (either number or a %) - // [2] - green component - // [3] - blue component - // [4] - optional alpha component - list(, $r, $g, $b) = $value; - $r = round($r); - $g = round($g); - $b = round($b); - - if (count($value) == 5 && $value[4] != 1) { // rgba - return 'rgba('.$r.','.$g.','.$b.','.$value[4].')'; - } - - $h = sprintf("#%02x%02x%02x", $r, $g, $b); - - if (!empty($this->formatter->compressColors)) { - // Converting hex color to short notation (e.g. #003399 to #039) - if ($h[1] === $h[2] && $h[3] === $h[4] && $h[5] === $h[6]) { - $h = '#' . $h[1] . $h[3] . $h[5]; - } - } - - return $h; - - case 'function': - list(, $name, $args) = $value; - return $name.'('.$this->compileValue($args).')'; - default: // assumed to be unit - $this->throwError("unknown value type: $value[0]"); - } - } - - protected function lib_pow($args) { - list($base, $exp) = $this->assertArgs($args, 2, "pow"); - return pow($this->assertNumber($base), $this->assertNumber($exp)); - } - - protected function lib_pi() { - return pi(); - } - - protected function lib_mod($args) { - list($a, $b) = $this->assertArgs($args, 2, "mod"); - return $this->assertNumber($a) % $this->assertNumber($b); - } - - protected function lib_tan($num) { - return tan($this->assertNumber($num)); - } - - protected function lib_sin($num) { - return sin($this->assertNumber($num)); - } - - protected function lib_cos($num) { - return cos($this->assertNumber($num)); - } - - protected function lib_atan($num) { - $num = atan($this->assertNumber($num)); - return array("number", $num, "rad"); - } - - protected function lib_asin($num) { - $num = asin($this->assertNumber($num)); - return array("number", $num, "rad"); - } - - protected function lib_acos($num) { - $num = acos($this->assertNumber($num)); - return array("number", $num, "rad"); - } - - protected function lib_sqrt($num) { - return sqrt($this->assertNumber($num)); - } - - protected function lib_extract($value) { - list($list, $idx) = $this->assertArgs($value, 2, "extract"); - $idx = $this->assertNumber($idx); - // 1 indexed - if ($list[0] == "list" && isset($list[2][$idx - 1])) { - return $list[2][$idx - 1]; - } - } - - protected function lib_isnumber($value) { - return $this->toBool($value[0] == "number"); - } - - protected function lib_isstring($value) { - return $this->toBool($value[0] == "string"); - } - - protected function lib_iscolor($value) { - return $this->toBool($this->coerceColor($value)); - } - - protected function lib_iskeyword($value) { - return $this->toBool($value[0] == "keyword"); - } - - protected function lib_ispixel($value) { - return $this->toBool($value[0] == "number" && $value[2] == "px"); - } - - protected function lib_ispercentage($value) { - return $this->toBool($value[0] == "number" && $value[2] == "%"); - } - - protected function lib_isem($value) { - return $this->toBool($value[0] == "number" && $value[2] == "em"); - } - - protected function lib_isrem($value) { - return $this->toBool($value[0] == "number" && $value[2] == "rem"); - } - - protected function lib_rgbahex($color) { - $color = $this->coerceColor($color); - if (is_null($color)) - $this->throwError("color expected for rgbahex"); - - return sprintf("#%02x%02x%02x%02x", - isset($color[4]) ? $color[4]*255 : 255, - $color[1],$color[2], $color[3]); - } - - protected function lib_argb($color){ - return $this->lib_rgbahex($color); - } - - /** - * Given an url, decide whether to output a regular link or the base64-encoded contents of the file - * - * @param array $value either an argument list (two strings) or a single string - * @return string formatted url(), either as a link or base64-encoded - */ - protected function lib_data_uri($value) { - $mime = ($value[0] === 'list') ? $value[2][0][2] : null; - $url = ($value[0] === 'list') ? $value[2][1][2][0] : $value[2][0]; - - $fullpath = $this->findImport($url); - - if($fullpath && ($fsize = filesize($fullpath)) !== false) { - // IE8 can't handle data uris larger than 32KB - if($fsize/1024 < 32) { - if(is_null($mime)) { - if(class_exists('finfo')) { // php 5.3+ - $finfo = new finfo(FILEINFO_MIME); - $mime = explode('; ', $finfo->file($fullpath)); - $mime = $mime[0]; - } elseif(function_exists('mime_content_type')) { // PHP 5.2 - $mime = mime_content_type($fullpath); - } - } - - if(!is_null($mime)) // fallback if the mime type is still unknown - $url = sprintf('data:%s;base64,%s', $mime, base64_encode(file_get_contents($fullpath))); - } - } - - return 'url("'.$url.'")'; - } - - // utility func to unquote a string - protected function lib_e($arg) { - switch ($arg[0]) { - case "list": - $items = $arg[2]; - if (isset($items[0])) { - return $this->lib_e($items[0]); - } - $this->throwError("unrecognised input"); - case "string": - $arg[1] = ""; - return $arg; - case "keyword": - return $arg; - default: - return array("keyword", $this->compileValue($arg)); - } - } - - protected function lib__sprintf($args) { - if ($args[0] != "list") return $args; - $values = $args[2]; - $string = array_shift($values); - $template = $this->compileValue($this->lib_e($string)); - - $i = 0; - if (preg_match_all('/%[dsa]/', $template, $m)) { - foreach ($m[0] as $match) { - $val = isset($values[$i]) ? - $this->reduce($values[$i]) : array('keyword', ''); - - // lessjs compat, renders fully expanded color, not raw color - if ($color = $this->coerceColor($val)) { - $val = $color; - } - - $i++; - $rep = $this->compileValue($this->lib_e($val)); - $template = preg_replace('/'.self::preg_quote($match).'/', - $rep, $template, 1); - } - } - - $d = $string[0] == "string" ? $string[1] : '"'; - return array("string", $d, array($template)); - } - - protected function lib_floor($arg) { - $value = $this->assertNumber($arg); - return array("number", floor($value), $arg[2]); - } - - protected function lib_ceil($arg) { - $value = $this->assertNumber($arg); - return array("number", ceil($value), $arg[2]); - } - - protected function lib_round($arg) { - if($arg[0] != "list") { - $value = $this->assertNumber($arg); - return array("number", round($value), $arg[2]); - } else { - $value = $this->assertNumber($arg[2][0]); - $precision = $this->assertNumber($arg[2][1]); - return array("number", round($value, $precision), $arg[2][0][2]); - } - } - - protected function lib_unit($arg) { - if ($arg[0] == "list") { - list($number, $newUnit) = $arg[2]; - return array("number", $this->assertNumber($number), - $this->compileValue($this->lib_e($newUnit))); - } else { - return array("number", $this->assertNumber($arg), ""); - } - } - - /** - * Helper function to get arguments for color manipulation functions. - * takes a list that contains a color like thing and a percentage - */ - public function colorArgs($args) { - if ($args[0] != 'list' || count($args[2]) < 2) { - return array(array('color', 0, 0, 0), 0); - } - list($color, $delta) = $args[2]; - $color = $this->assertColor($color); - $delta = floatval($delta[1]); - - return array($color, $delta); - } - - protected function lib_darken($args) { - list($color, $delta) = $this->colorArgs($args); - - $hsl = $this->toHSL($color); - $hsl[3] = $this->clamp($hsl[3] - $delta, 100); - return $this->toRGB($hsl); - } - - protected function lib_lighten($args) { - list($color, $delta) = $this->colorArgs($args); - - $hsl = $this->toHSL($color); - $hsl[3] = $this->clamp($hsl[3] + $delta, 100); - return $this->toRGB($hsl); - } - - protected function lib_saturate($args) { - list($color, $delta) = $this->colorArgs($args); - - $hsl = $this->toHSL($color); - $hsl[2] = $this->clamp($hsl[2] + $delta, 100); - return $this->toRGB($hsl); - } - - protected function lib_desaturate($args) { - list($color, $delta) = $this->colorArgs($args); - - $hsl = $this->toHSL($color); - $hsl[2] = $this->clamp($hsl[2] - $delta, 100); - return $this->toRGB($hsl); - } - - protected function lib_spin($args) { - list($color, $delta) = $this->colorArgs($args); - - $hsl = $this->toHSL($color); - - $hsl[1] = $hsl[1] + $delta % 360; - if ($hsl[1] < 0) $hsl[1] += 360; - - return $this->toRGB($hsl); - } - - protected function lib_fadeout($args) { - list($color, $delta) = $this->colorArgs($args); - $color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) - $delta/100); - return $color; - } - - protected function lib_fadein($args) { - list($color, $delta) = $this->colorArgs($args); - $color[4] = $this->clamp((isset($color[4]) ? $color[4] : 1) + $delta/100); - return $color; - } - - protected function lib_hue($color) { - $hsl = $this->toHSL($this->assertColor($color)); - return round($hsl[1]); - } - - protected function lib_saturation($color) { - $hsl = $this->toHSL($this->assertColor($color)); - return round($hsl[2]); - } - - protected function lib_lightness($color) { - $hsl = $this->toHSL($this->assertColor($color)); - return round($hsl[3]); - } - - // get the alpha of a color - // defaults to 1 for non-colors or colors without an alpha - protected function lib_alpha($value) { - if (!is_null($color = $this->coerceColor($value))) { - return isset($color[4]) ? $color[4] : 1; - } - } - - // set the alpha of the color - protected function lib_fade($args) { - list($color, $alpha) = $this->colorArgs($args); - $color[4] = $this->clamp($alpha / 100.0); - return $color; - } - - protected function lib_percentage($arg) { - $num = $this->assertNumber($arg); - return array("number", $num*100, "%"); - } - - // mixes two colors by weight - // mix(@color1, @color2, [@weight: 50%]); - // http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#mix-instance_method - protected function lib_mix($args) { - if ($args[0] != "list" || count($args[2]) < 2) - $this->throwError("mix expects (color1, color2, weight)"); - - list($first, $second) = $args[2]; - $first = $this->assertColor($first); - $second = $this->assertColor($second); - - $first_a = $this->lib_alpha($first); - $second_a = $this->lib_alpha($second); - - if (isset($args[2][2])) { - $weight = $args[2][2][1] / 100.0; - } else { - $weight = 0.5; - } - - $w = $weight * 2 - 1; - $a = $first_a - $second_a; - - $w1 = (($w * $a == -1 ? $w : ($w + $a)/(1 + $w * $a)) + 1) / 2.0; - $w2 = 1.0 - $w1; - - $new = array('color', - $w1 * $first[1] + $w2 * $second[1], - $w1 * $first[2] + $w2 * $second[2], - $w1 * $first[3] + $w2 * $second[3], - ); - - if ($first_a != 1.0 || $second_a != 1.0) { - $new[] = $first_a * $weight + $second_a * ($weight - 1); - } - - return $this->fixColor($new); - } - - protected function lib_contrast($args) { - $darkColor = array('color', 0, 0, 0); - $lightColor = array('color', 255, 255, 255); - $threshold = 0.43; - - if ( $args[0] == 'list' ) { - $inputColor = ( isset($args[2][0]) ) ? $this->assertColor($args[2][0]) : $lightColor; - $darkColor = ( isset($args[2][1]) ) ? $this->assertColor($args[2][1]) : $darkColor; - $lightColor = ( isset($args[2][2]) ) ? $this->assertColor($args[2][2]) : $lightColor; - $threshold = ( isset($args[2][3]) ) ? $this->assertNumber($args[2][3]) : $threshold; - } - else { - $inputColor = $this->assertColor($args); - } - - $inputColor = $this->coerceColor($inputColor); - $darkColor = $this->coerceColor($darkColor); - $lightColor = $this->coerceColor($lightColor); - - //Figure out which is actually light and dark! - if ( $this->lib_luma($darkColor) > $this->lib_luma($lightColor) ) { - $t = $lightColor; - $lightColor = $darkColor; - $darkColor = $t; - } - - $inputColor_alpha = $this->lib_alpha($inputColor); - if ( ( $this->lib_luma($inputColor) * $inputColor_alpha) < $threshold) { - return $lightColor; - } - return $darkColor; - } - - protected function lib_luma($color) { - $color = $this->coerceColor($color); - return (0.2126 * $color[0] / 255) + (0.7152 * $color[1] / 255) + (0.0722 * $color[2] / 255); - } - - - public function assertColor($value, $error = "expected color value") { - $color = $this->coerceColor($value); - if (is_null($color)) $this->throwError($error); - return $color; - } - - public function assertNumber($value, $error = "expecting number") { - if ($value[0] == "number") return $value[1]; - $this->throwError($error); - } - - public function assertArgs($value, $expectedArgs, $name="") { - if ($expectedArgs == 1) { - return $value; - } else { - if ($value[0] !== "list" || $value[1] != ",") $this->throwError("expecting list"); - $values = $value[2]; - $numValues = count($values); - if ($expectedArgs != $numValues) { - if ($name) { - $name = $name . ": "; - } - - $this->throwError("${name}expecting $expectedArgs arguments, got $numValues"); - } - - return $values; - } - } - - protected function toHSL($color) { - if ($color[0] == 'hsl') return $color; - - $r = $color[1] / 255; - $g = $color[2] / 255; - $b = $color[3] / 255; - - $min = min($r, $g, $b); - $max = max($r, $g, $b); - - $L = ($min + $max) / 2; - if ($min == $max) { - $S = $H = 0; - } else { - if ($L < 0.5) - $S = ($max - $min)/($max + $min); - else - $S = ($max - $min)/(2.0 - $max - $min); - - if ($r == $max) $H = ($g - $b)/($max - $min); - elseif ($g == $max) $H = 2.0 + ($b - $r)/($max - $min); - elseif ($b == $max) $H = 4.0 + ($r - $g)/($max - $min); - - } - - $out = array('hsl', - ($H < 0 ? $H + 6 : $H)*60, - $S*100, - $L*100, - ); - - if (count($color) > 4) $out[] = $color[4]; // copy alpha - return $out; - } - - protected function toRGB_helper($comp, $temp1, $temp2) { - if ($comp < 0) $comp += 1.0; - elseif ($comp > 1) $comp -= 1.0; - - if (6 * $comp < 1) return $temp1 + ($temp2 - $temp1) * 6 * $comp; - if (2 * $comp < 1) return $temp2; - if (3 * $comp < 2) return $temp1 + ($temp2 - $temp1)*((2/3) - $comp) * 6; - - return $temp1; - } - - /** - * Converts a hsl array into a color value in rgb. - * Expects H to be in range of 0 to 360, S and L in 0 to 100 - */ - protected function toRGB($color) { - if ($color[0] == 'color') return $color; - - $H = $color[1] / 360; - $S = $color[2] / 100; - $L = $color[3] / 100; - - if ($S == 0) { - $r = $g = $b = $L; - } else { - $temp2 = $L < 0.5 ? - $L*(1.0 + $S) : - $L + $S - $L * $S; - - $temp1 = 2.0 * $L - $temp2; - - $r = $this->toRGB_helper($H + 1/3, $temp1, $temp2); - $g = $this->toRGB_helper($H, $temp1, $temp2); - $b = $this->toRGB_helper($H - 1/3, $temp1, $temp2); - } - - // $out = array('color', round($r*255), round($g*255), round($b*255)); - $out = array('color', $r*255, $g*255, $b*255); - if (count($color) > 4) $out[] = $color[4]; // copy alpha - return $out; - } - - protected function clamp($v, $max = 1, $min = 0) { - return min($max, max($min, $v)); - } - - /** - * Convert the rgb, rgba, hsl color literals of function type - * as returned by the parser into values of color type. - */ - protected function funcToColor($func) { - $fname = $func[1]; - if ($func[2][0] != 'list') return false; // need a list of arguments - $rawComponents = $func[2][2]; - - if ($fname == 'hsl' || $fname == 'hsla') { - $hsl = array('hsl'); - $i = 0; - foreach ($rawComponents as $c) { - $val = $this->reduce($c); - $val = isset($val[1]) ? floatval($val[1]) : 0; - - if ($i == 0) $clamp = 360; - elseif ($i < 3) $clamp = 100; - else $clamp = 1; - - $hsl[] = $this->clamp($val, $clamp); - $i++; - } - - while (count($hsl) < 4) $hsl[] = 0; - return $this->toRGB($hsl); - - } elseif ($fname == 'rgb' || $fname == 'rgba') { - $components = array(); - $i = 1; - foreach ($rawComponents as $c) { - $c = $this->reduce($c); - if ($i < 4) { - if ($c[0] == "number" && $c[2] == "%") { - $components[] = 255 * ($c[1] / 100); - } else { - $components[] = floatval($c[1]); - } - } elseif ($i == 4) { - if ($c[0] == "number" && $c[2] == "%") { - $components[] = 1.0 * ($c[1] / 100); - } else { - $components[] = floatval($c[1]); - } - } else break; - - $i++; - } - while (count($components) < 3) $components[] = 0; - array_unshift($components, 'color'); - return $this->fixColor($components); - } - - return false; - } - - protected function reduce($value, $forExpression = false) { - switch ($value[0]) { - case "interpolate": - $reduced = $this->reduce($value[1]); - $var = $this->compileValue($reduced); - $res = $this->reduce(array("variable", $this->vPrefix . $var)); - - if ($res[0] == "raw_color") { - $res = $this->coerceColor($res); - } - - if (empty($value[2])) $res = $this->lib_e($res); - - return $res; - case "variable": - $key = $value[1]; - if (is_array($key)) { - $key = $this->reduce($key); - $key = $this->vPrefix . $this->compileValue($this->lib_e($key)); - } - - $seen =& $this->env->seenNames; - - if (!empty($seen[$key])) { - $this->throwError("infinite loop detected: $key"); - } - - $seen[$key] = true; - $out = $this->reduce($this->get($key)); - $seen[$key] = false; - return $out; - case "list": - foreach ($value[2] as &$item) { - $item = $this->reduce($item, $forExpression); - } - return $value; - case "expression": - return $this->evaluate($value); - case "string": - foreach ($value[2] as &$part) { - if (is_array($part)) { - $strip = $part[0] == "variable"; - $part = $this->reduce($part); - if ($strip) $part = $this->lib_e($part); - } - } - return $value; - case "escape": - list(,$inner) = $value; - return $this->lib_e($this->reduce($inner)); - case "function": - $color = $this->funcToColor($value); - if ($color) return $color; - - list(, $name, $args) = $value; - if ($name == "%") $name = "_sprintf"; - - $f = isset($this->libFunctions[$name]) ? - $this->libFunctions[$name] : array($this, 'lib_'.str_replace('-', '_', $name)); - - if (is_callable($f)) { - if ($args[0] == 'list') - $args = self::compressList($args[2], $args[1]); - - $ret = call_user_func($f, $this->reduce($args, true), $this); - - if (is_null($ret)) { - return array("string", "", array( - $name, "(", $args, ")" - )); - } - - // convert to a typed value if the result is a php primitive - if (is_numeric($ret)) $ret = array('number', $ret, ""); - elseif (!is_array($ret)) $ret = array('keyword', $ret); - - return $ret; - } - - // plain function, reduce args - $value[2] = $this->reduce($value[2]); - return $value; - case "unary": - list(, $op, $exp) = $value; - $exp = $this->reduce($exp); - - if ($exp[0] == "number") { - switch ($op) { - case "+": - return $exp; - case "-": - $exp[1] *= -1; - return $exp; - } - } - return array("string", "", array($op, $exp)); - } - - if ($forExpression) { - switch ($value[0]) { - case "keyword": - if ($color = $this->coerceColor($value)) { - return $color; - } - break; - case "raw_color": - return $this->coerceColor($value); - } - } - - return $value; - } - - - // coerce a value for use in color operation - protected function coerceColor($value) { - switch($value[0]) { - case 'color': return $value; - case 'raw_color': - $c = array("color", 0, 0, 0); - $colorStr = substr($value[1], 1); - $num = hexdec($colorStr); - $width = strlen($colorStr) == 3 ? 16 : 256; - - for ($i = 3; $i > 0; $i--) { // 3 2 1 - $t = $num % $width; - $num /= $width; - - $c[$i] = $t * (256/$width) + $t * floor(16/$width); - } - - return $c; - case 'keyword': - $name = $value[1]; - if (isset(self::$cssColors[$name])) { - $rgba = explode(',', self::$cssColors[$name]); - - if(isset($rgba[3])) - return array('color', $rgba[0], $rgba[1], $rgba[2], $rgba[3]); - - return array('color', $rgba[0], $rgba[1], $rgba[2]); - } - return null; - } - } - - // make something string like into a string - protected function coerceString($value) { - switch ($value[0]) { - case "string": - return $value; - case "keyword": - return array("string", "", array($value[1])); - } - return null; - } - - // turn list of length 1 into value type - protected function flattenList($value) { - if ($value[0] == "list" && count($value[2]) == 1) { - return $this->flattenList($value[2][0]); - } - return $value; - } - - public function toBool($a) { - if ($a) return self::$TRUE; - else return self::$FALSE; - } - - // evaluate an expression - protected function evaluate($exp) { - list(, $op, $left, $right, $whiteBefore, $whiteAfter) = $exp; - - $left = $this->reduce($left, true); - $right = $this->reduce($right, true); - - if ($leftColor = $this->coerceColor($left)) { - $left = $leftColor; - } - - if ($rightColor = $this->coerceColor($right)) { - $right = $rightColor; - } - - $ltype = $left[0]; - $rtype = $right[0]; - - // operators that work on all types - if ($op == "and") { - return $this->toBool($left == self::$TRUE && $right == self::$TRUE); - } - - if ($op == "=") { - return $this->toBool($this->eq($left, $right) ); - } - - if ($op == "+" && !is_null($str = $this->stringConcatenate($left, $right))) { - return $str; - } - - // type based operators - $fname = "op_${ltype}_${rtype}"; - if (is_callable(array($this, $fname))) { - $out = $this->$fname($op, $left, $right); - if (!is_null($out)) return $out; - } - - // make the expression look it did before being parsed - $paddedOp = $op; - if ($whiteBefore) $paddedOp = " " . $paddedOp; - if ($whiteAfter) $paddedOp .= " "; - - return array("string", "", array($left, $paddedOp, $right)); - } - - protected function stringConcatenate($left, $right) { - if ($strLeft = $this->coerceString($left)) { - if ($right[0] == "string") { - $right[1] = ""; - } - $strLeft[2][] = $right; - return $strLeft; - } - - if ($strRight = $this->coerceString($right)) { - array_unshift($strRight[2], $left); - return $strRight; - } - } - - - // make sure a color's components don't go out of bounds - protected function fixColor($c) { - foreach (range(1, 3) as $i) { - if ($c[$i] < 0) $c[$i] = 0; - if ($c[$i] > 255) $c[$i] = 255; - } - - return $c; - } - - protected function op_number_color($op, $lft, $rgt) { - if ($op == '+' || $op == '*') { - return $this->op_color_number($op, $rgt, $lft); - } - } - - protected function op_color_number($op, $lft, $rgt) { - if ($rgt[0] == '%') $rgt[1] /= 100; - - return $this->op_color_color($op, $lft, - array_fill(1, count($lft) - 1, $rgt[1])); - } - - protected function op_color_color($op, $left, $right) { - $out = array('color'); - $max = count($left) > count($right) ? count($left) : count($right); - foreach (range(1, $max - 1) as $i) { - $lval = isset($left[$i]) ? $left[$i] : 0; - $rval = isset($right[$i]) ? $right[$i] : 0; - switch ($op) { - case '+': - $out[] = $lval + $rval; - break; - case '-': - $out[] = $lval - $rval; - break; - case '*': - $out[] = $lval * $rval; - break; - case '%': - $out[] = $lval % $rval; - break; - case '/': - if ($rval == 0) $this->throwError("evaluate error: can't divide by zero"); - $out[] = $lval / $rval; - break; - default: - $this->throwError('evaluate error: color op number failed on op '.$op); - } - } - return $this->fixColor($out); - } - - function lib_red($color){ - $color = $this->coerceColor($color); - if (is_null($color)) { - $this->throwError('color expected for red()'); - } - - return $color[1]; - } - - function lib_green($color){ - $color = $this->coerceColor($color); - if (is_null($color)) { - $this->throwError('color expected for green()'); - } - - return $color[2]; - } - - function lib_blue($color){ - $color = $this->coerceColor($color); - if (is_null($color)) { - $this->throwError('color expected for blue()'); - } - - return $color[3]; - } - - - // operator on two numbers - protected function op_number_number($op, $left, $right) { - $unit = empty($left[2]) ? $right[2] : $left[2]; - - $value = 0; - switch ($op) { - case '+': - $value = $left[1] + $right[1]; - break; - case '*': - $value = $left[1] * $right[1]; - break; - case '-': - $value = $left[1] - $right[1]; - break; - case '%': - $value = $left[1] % $right[1]; - break; - case '/': - if ($right[1] == 0) $this->throwError('parse error: divide by zero'); - $value = $left[1] / $right[1]; - break; - case '<': - return $this->toBool($left[1] < $right[1]); - case '>': - return $this->toBool($left[1] > $right[1]); - case '>=': - return $this->toBool($left[1] >= $right[1]); - case '=<': - return $this->toBool($left[1] <= $right[1]); - default: - $this->throwError('parse error: unknown number operator: '.$op); - } - - return array("number", $value, $unit); - } - - - /* environment functions */ - - protected function makeOutputBlock($type, $selectors = null) { - $b = new stdclass; - $b->lines = array(); - $b->children = array(); - $b->selectors = $selectors; - $b->type = $type; - $b->parent = $this->scope; - return $b; - } - - // the state of execution - protected function pushEnv($block = null) { - $e = new stdclass; - $e->parent = $this->env; - $e->store = array(); - $e->block = $block; - - $this->env = $e; - return $e; - } - - // pop something off the stack - protected function popEnv() { - $old = $this->env; - $this->env = $this->env->parent; - return $old; - } - - // set something in the current env - protected function set($name, $value) { - $this->env->store[$name] = $value; - } - - - // get the highest occurrence entry for a name - protected function get($name) { - $current = $this->env; - - $isArguments = $name == $this->vPrefix . 'arguments'; - while ($current) { - if ($isArguments && isset($current->arguments)) { - return array('list', ' ', $current->arguments); - } - - if (isset($current->store[$name])) - return $current->store[$name]; - else { - $current = isset($current->storeParent) ? - $current->storeParent : $current->parent; - } - } - - $this->throwError("variable $name is undefined"); - } - - // inject array of unparsed strings into environment as variables - protected function injectVariables($args) { - $this->pushEnv(); - $parser = new lessc_parser($this, __METHOD__); - foreach ($args as $name => $strValue) { - if ($name{0} != '@') $name = '@'.$name; - $parser->count = 0; - $parser->buffer = (string)$strValue; - if (!$parser->propertyValue($value)) { - throw new Exception("failed to parse passed in variable $name: $strValue"); - } - - $this->set($name, $value); - } - } - - /** - * Initialize any static state, can initialize parser for a file - * $opts isn't used yet - */ - public function __construct($fname = null) { - if ($fname !== null) { - // used for deprecated parse method - $this->_parseFile = $fname; - } - } - - public function compile($string, $name = null) { - $locale = setlocale(LC_NUMERIC, 0); - setlocale(LC_NUMERIC, "C"); - - $this->parser = $this->makeParser($name); - $root = $this->parser->parse($string); - - $this->env = null; - $this->scope = null; - - $this->formatter = $this->newFormatter(); - - if (!empty($this->registeredVars)) { - $this->injectVariables($this->registeredVars); - } - - $this->sourceParser = $this->parser; // used for error messages - $this->compileBlock($root); - - ob_start(); - $this->formatter->block($this->scope); - $out = ob_get_clean(); - setlocale(LC_NUMERIC, $locale); - return $out; - } - - public function compileFile($fname, $outFname = null) { - if (!is_readable($fname)) { - throw new Exception('load error: failed to find '.$fname); - } - - $pi = pathinfo($fname); - - $oldImport = $this->importDir; - - $this->importDir = (array)$this->importDir; - $this->importDir[] = $pi['dirname'].'/'; - - $this->addParsedFile($fname); - - $out = $this->compile(file_get_contents($fname), $fname); - - $this->importDir = $oldImport; - - if ($outFname !== null) { - return file_put_contents($outFname, $out); - } - - return $out; - } - - // compile only if changed input has changed or output doesn't exist - public function checkedCompile($in, $out) { - if (!is_file($out) || filemtime($in) > filemtime($out)) { - $this->compileFile($in, $out); - return true; - } - return false; - } - - /** - * Execute lessphp on a .less file or a lessphp cache structure - * - * The lessphp cache structure contains information about a specific - * less file having been parsed. It can be used as a hint for future - * calls to determine whether or not a rebuild is required. - * - * The cache structure contains two important keys that may be used - * externally: - * - * compiled: The final compiled CSS - * updated: The time (in seconds) the CSS was last compiled - * - * The cache structure is a plain-ol' PHP associative array and can - * be serialized and unserialized without a hitch. - * - * @param mixed $in Input - * @param bool $force Force rebuild? - * @return array lessphp cache structure - */ - public function cachedCompile($in, $force = false) { - // assume no root - $root = null; - - if (is_string($in)) { - $root = $in; - } elseif (is_array($in) and isset($in['root'])) { - if ($force or ! isset($in['files'])) { - // If we are forcing a recompile or if for some reason the - // structure does not contain any file information we should - // specify the root to trigger a rebuild. - $root = $in['root']; - } elseif (isset($in['files']) and is_array($in['files'])) { - foreach ($in['files'] as $fname => $ftime ) { - if (!file_exists($fname) or filemtime($fname) > $ftime) { - // One of the files we knew about previously has changed - // so we should look at our incoming root again. - $root = $in['root']; - break; - } - } - } - } else { - // TODO: Throw an exception? We got neither a string nor something - // that looks like a compatible lessphp cache structure. - return null; - } - - if ($root !== null) { - // If we have a root value which means we should rebuild. - $out = array(); - $out['root'] = $root; - $out['compiled'] = $this->compileFile($root); - $out['files'] = $this->allParsedFiles(); - $out['updated'] = time(); - return $out; - } else { - // No changes, pass back the structure - // we were given initially. - return $in; - } - - } - - // parse and compile buffer - // This is deprecated - public function parse($str = null, $initialVariables = null) { - if (is_array($str)) { - $initialVariables = $str; - $str = null; - } - - $oldVars = $this->registeredVars; - if ($initialVariables !== null) { - $this->setVariables($initialVariables); - } - - if ($str == null) { - if (empty($this->_parseFile)) { - throw new exception("nothing to parse"); - } - - $out = $this->compileFile($this->_parseFile); - } else { - $out = $this->compile($str); - } - - $this->registeredVars = $oldVars; - return $out; - } - - protected function makeParser($name) { - $parser = new lessc_parser($this, $name); - $parser->writeComments = $this->preserveComments; - - return $parser; - } - - public function setFormatter($name) { - $this->formatterName = $name; - } - - protected function newFormatter() { - $className = "lessc_formatter_lessjs"; - if (!empty($this->formatterName)) { - if (!is_string($this->formatterName)) - return $this->formatterName; - $className = "lessc_formatter_$this->formatterName"; - } - - return new $className; - } - - public function setPreserveComments($preserve) { - $this->preserveComments = $preserve; - } - - public function registerFunction($name, $func) { - $this->libFunctions[$name] = $func; - } - - public function unregisterFunction($name) { - unset($this->libFunctions[$name]); - } - - public function setVariables($variables) { - $this->registeredVars = array_merge($this->registeredVars, $variables); - } - - public function unsetVariable($name) { - unset($this->registeredVars[$name]); - } - - public function setImportDir($dirs) { - $this->importDir = (array)$dirs; - } - - public function addImportDir($dir) { - $this->importDir = (array)$this->importDir; - $this->importDir[] = $dir; - } - - public function allParsedFiles() { - return $this->allParsedFiles; - } - - public function addParsedFile($file) { - $this->allParsedFiles[realpath($file)] = filemtime($file); - } - - /** - * Uses the current value of $this->count to show line and line number - */ - public function throwError($msg = null) { - if ($this->sourceLoc >= 0) { - $this->sourceParser->throwError($msg, $this->sourceLoc); - } - throw new exception($msg); - } - - // compile file $in to file $out if $in is newer than $out - // returns true when it compiles, false otherwise - public static function ccompile($in, $out, $less = null) { - if ($less === null) { - $less = new self; - } - return $less->checkedCompile($in, $out); - } - - public static function cexecute($in, $force = false, $less = null) { - if ($less === null) { - $less = new self; - } - return $less->cachedCompile($in, $force); - } - - static protected $cssColors = array( - 'aliceblue' => '240,248,255', - 'antiquewhite' => '250,235,215', - 'aqua' => '0,255,255', - 'aquamarine' => '127,255,212', - 'azure' => '240,255,255', - 'beige' => '245,245,220', - 'bisque' => '255,228,196', - 'black' => '0,0,0', - 'blanchedalmond' => '255,235,205', - 'blue' => '0,0,255', - 'blueviolet' => '138,43,226', - 'brown' => '165,42,42', - 'burlywood' => '222,184,135', - 'cadetblue' => '95,158,160', - 'chartreuse' => '127,255,0', - 'chocolate' => '210,105,30', - 'coral' => '255,127,80', - 'cornflowerblue' => '100,149,237', - 'cornsilk' => '255,248,220', - 'crimson' => '220,20,60', - 'cyan' => '0,255,255', - 'darkblue' => '0,0,139', - 'darkcyan' => '0,139,139', - 'darkgoldenrod' => '184,134,11', - 'darkgray' => '169,169,169', - 'darkgreen' => '0,100,0', - 'darkgrey' => '169,169,169', - 'darkkhaki' => '189,183,107', - 'darkmagenta' => '139,0,139', - 'darkolivegreen' => '85,107,47', - 'darkorange' => '255,140,0', - 'darkorchid' => '153,50,204', - 'darkred' => '139,0,0', - 'darksalmon' => '233,150,122', - 'darkseagreen' => '143,188,143', - 'darkslateblue' => '72,61,139', - 'darkslategray' => '47,79,79', - 'darkslategrey' => '47,79,79', - 'darkturquoise' => '0,206,209', - 'darkviolet' => '148,0,211', - 'deeppink' => '255,20,147', - 'deepskyblue' => '0,191,255', - 'dimgray' => '105,105,105', - 'dimgrey' => '105,105,105', - 'dodgerblue' => '30,144,255', - 'firebrick' => '178,34,34', - 'floralwhite' => '255,250,240', - 'forestgreen' => '34,139,34', - 'fuchsia' => '255,0,255', - 'gainsboro' => '220,220,220', - 'ghostwhite' => '248,248,255', - 'gold' => '255,215,0', - 'goldenrod' => '218,165,32', - 'gray' => '128,128,128', - 'green' => '0,128,0', - 'greenyellow' => '173,255,47', - 'grey' => '128,128,128', - 'honeydew' => '240,255,240', - 'hotpink' => '255,105,180', - 'indianred' => '205,92,92', - 'indigo' => '75,0,130', - 'ivory' => '255,255,240', - 'khaki' => '240,230,140', - 'lavender' => '230,230,250', - 'lavenderblush' => '255,240,245', - 'lawngreen' => '124,252,0', - 'lemonchiffon' => '255,250,205', - 'lightblue' => '173,216,230', - 'lightcoral' => '240,128,128', - 'lightcyan' => '224,255,255', - 'lightgoldenrodyellow' => '250,250,210', - 'lightgray' => '211,211,211', - 'lightgreen' => '144,238,144', - 'lightgrey' => '211,211,211', - 'lightpink' => '255,182,193', - 'lightsalmon' => '255,160,122', - 'lightseagreen' => '32,178,170', - 'lightskyblue' => '135,206,250', - 'lightslategray' => '119,136,153', - 'lightslategrey' => '119,136,153', - 'lightsteelblue' => '176,196,222', - 'lightyellow' => '255,255,224', - 'lime' => '0,255,0', - 'limegreen' => '50,205,50', - 'linen' => '250,240,230', - 'magenta' => '255,0,255', - 'maroon' => '128,0,0', - 'mediumaquamarine' => '102,205,170', - 'mediumblue' => '0,0,205', - 'mediumorchid' => '186,85,211', - 'mediumpurple' => '147,112,219', - 'mediumseagreen' => '60,179,113', - 'mediumslateblue' => '123,104,238', - 'mediumspringgreen' => '0,250,154', - 'mediumturquoise' => '72,209,204', - 'mediumvioletred' => '199,21,133', - 'midnightblue' => '25,25,112', - 'mintcream' => '245,255,250', - 'mistyrose' => '255,228,225', - 'moccasin' => '255,228,181', - 'navajowhite' => '255,222,173', - 'navy' => '0,0,128', - 'oldlace' => '253,245,230', - 'olive' => '128,128,0', - 'olivedrab' => '107,142,35', - 'orange' => '255,165,0', - 'orangered' => '255,69,0', - 'orchid' => '218,112,214', - 'palegoldenrod' => '238,232,170', - 'palegreen' => '152,251,152', - 'paleturquoise' => '175,238,238', - 'palevioletred' => '219,112,147', - 'papayawhip' => '255,239,213', - 'peachpuff' => '255,218,185', - 'peru' => '205,133,63', - 'pink' => '255,192,203', - 'plum' => '221,160,221', - 'powderblue' => '176,224,230', - 'purple' => '128,0,128', - 'red' => '255,0,0', - 'rosybrown' => '188,143,143', - 'royalblue' => '65,105,225', - 'saddlebrown' => '139,69,19', - 'salmon' => '250,128,114', - 'sandybrown' => '244,164,96', - 'seagreen' => '46,139,87', - 'seashell' => '255,245,238', - 'sienna' => '160,82,45', - 'silver' => '192,192,192', - 'skyblue' => '135,206,235', - 'slateblue' => '106,90,205', - 'slategray' => '112,128,144', - 'slategrey' => '112,128,144', - 'snow' => '255,250,250', - 'springgreen' => '0,255,127', - 'steelblue' => '70,130,180', - 'tan' => '210,180,140', - 'teal' => '0,128,128', - 'thistle' => '216,191,216', - 'tomato' => '255,99,71', - 'transparent' => '0,0,0,0', - 'turquoise' => '64,224,208', - 'violet' => '238,130,238', - 'wheat' => '245,222,179', - 'white' => '255,255,255', - 'whitesmoke' => '245,245,245', - 'yellow' => '255,255,0', - 'yellowgreen' => '154,205,50' - ); -} - -// responsible for taking a string of LESS code and converting it into a -// syntax tree -class lessc_parser { - static protected $nextBlockId = 0; // used to uniquely identify blocks - - static protected $precedence = array( - '=<' => 0, - '>=' => 0, - '=' => 0, - '<' => 0, - '>' => 0, - - '+' => 1, - '-' => 1, - '*' => 2, - '/' => 2, - '%' => 2, - ); - - static protected $whitePattern; - static protected $commentMulti; - - static protected $commentSingle = "//"; - static protected $commentMultiLeft = "/*"; - static protected $commentMultiRight = "*/"; - - // regex string to match any of the operators - static protected $operatorString; - - // these properties will supress division unless it's inside parenthases - static protected $supressDivisionProps = - array('/border-radius$/i', '/^font$/i'); - - protected $blockDirectives = array("font-face", "keyframes", "page", "-moz-document", "viewport", "-moz-viewport", "-o-viewport", "-ms-viewport"); - protected $lineDirectives = array("charset"); - - /** - * if we are in parens we can be more liberal with whitespace around - * operators because it must evaluate to a single value and thus is less - * ambiguous. - * - * Consider: - * property1: 10 -5; // is two numbers, 10 and -5 - * property2: (10 -5); // should evaluate to 5 - */ - protected $inParens = false; - - // caches preg escaped literals - static protected $literalCache = array(); - - public function __construct($lessc, $sourceName = null) { - $this->eatWhiteDefault = true; - // reference to less needed for vPrefix, mPrefix, and parentSelector - $this->lessc = $lessc; - - $this->sourceName = $sourceName; // name used for error messages - - $this->writeComments = false; - - if (!self::$operatorString) { - self::$operatorString = - '('.implode('|', array_map(array('lessc', 'preg_quote'), - array_keys(self::$precedence))).')'; - - $commentSingle = lessc::preg_quote(self::$commentSingle); - $commentMultiLeft = lessc::preg_quote(self::$commentMultiLeft); - $commentMultiRight = lessc::preg_quote(self::$commentMultiRight); - - self::$commentMulti = $commentMultiLeft.'.*?'.$commentMultiRight; - self::$whitePattern = '/'.$commentSingle.'[^\n]*\s*|('.self::$commentMulti.')\s*|\s+/Ais'; - } - } - - public function parse($buffer) { - $this->count = 0; - $this->line = 1; - - $this->env = null; // block stack - $this->buffer = $this->writeComments ? $buffer : $this->removeComments($buffer); - $this->pushSpecialBlock("root"); - $this->eatWhiteDefault = true; - $this->seenComments = array(); - - // trim whitespace on head - // if (preg_match('/^\s+/', $this->buffer, $m)) { - // $this->line += substr_count($m[0], "\n"); - // $this->buffer = ltrim($this->buffer); - // } - $this->whitespace(); - - // parse the entire file - while (false !== $this->parseChunk()); - - if ($this->count != strlen($this->buffer)) - $this->throwError(); - - // TODO report where the block was opened - if ( !property_exists($this->env, 'parent') || !is_null($this->env->parent) ) - throw new exception('parse error: unclosed block'); - - return $this->env; - } - - /** - * Parse a single chunk off the head of the buffer and append it to the - * current parse environment. - * Returns false when the buffer is empty, or when there is an error. - * - * This function is called repeatedly until the entire document is - * parsed. - * - * This parser is most similar to a recursive descent parser. Single - * functions represent discrete grammatical rules for the language, and - * they are able to capture the text that represents those rules. - * - * Consider the function lessc::keyword(). (all parse functions are - * structured the same) - * - * The function takes a single reference argument. When calling the - * function it will attempt to match a keyword on the head of the buffer. - * If it is successful, it will place the keyword in the referenced - * argument, advance the position in the buffer, and return true. If it - * fails then it won't advance the buffer and it will return false. - * - * All of these parse functions are powered by lessc::match(), which behaves - * the same way, but takes a literal regular expression. Sometimes it is - * more convenient to use match instead of creating a new function. - * - * Because of the format of the functions, to parse an entire string of - * grammatical rules, you can chain them together using &&. - * - * But, if some of the rules in the chain succeed before one fails, then - * the buffer position will be left at an invalid state. In order to - * avoid this, lessc::seek() is used to remember and set buffer positions. - * - * Before parsing a chain, use $s = $this->seek() to remember the current - * position into $s. Then if a chain fails, use $this->seek($s) to - * go back where we started. - */ - protected function parseChunk() { - if (empty($this->buffer)) return false; - $s = $this->seek(); - - if ($this->whitespace()) { - return true; - } - - // setting a property - if ($this->keyword($key) && $this->assign() && - $this->propertyValue($value, $key) && $this->end()) - { - $this->append(array('assign', $key, $value), $s); - return true; - } else { - $this->seek($s); - } - - - // look for special css blocks - if ($this->literal('@', false)) { - $this->count--; - - // media - if ($this->literal('@media')) { - if (($this->mediaQueryList($mediaQueries) || true) - && $this->literal('{')) - { - $media = $this->pushSpecialBlock("media"); - $media->queries = is_null($mediaQueries) ? array() : $mediaQueries; - return true; - } else { - $this->seek($s); - return false; - } - } - - if ($this->literal("@", false) && $this->keyword($dirName)) { - if ($this->isDirective($dirName, $this->blockDirectives)) { - if (($this->openString("{", $dirValue, null, array(";")) || true) && - $this->literal("{")) - { - $dir = $this->pushSpecialBlock("directive"); - $dir->name = $dirName; - if (isset($dirValue)) $dir->value = $dirValue; - return true; - } - } elseif ($this->isDirective($dirName, $this->lineDirectives)) { - if ($this->propertyValue($dirValue) && $this->end()) { - $this->append(array("directive", $dirName, $dirValue)); - return true; - } - } - } - - $this->seek($s); - } - - // setting a variable - if ($this->variable($var) && $this->assign() && - $this->propertyValue($value) && $this->end()) - { - $this->append(array('assign', $var, $value), $s); - return true; - } else { - $this->seek($s); - } - - if ($this->import($importValue)) { - $this->append($importValue, $s); - return true; - } - - // opening parametric mixin - if ($this->tag($tag, true) && $this->argumentDef($args, $isVararg) && - ($this->guards($guards) || true) && - $this->literal('{')) - { - $block = $this->pushBlock($this->fixTags(array($tag))); - $block->args = $args; - $block->isVararg = $isVararg; - if (!empty($guards)) $block->guards = $guards; - return true; - } else { - $this->seek($s); - } - - // opening a simple block - if ($this->tags($tags) && $this->literal('{', false)) { - $tags = $this->fixTags($tags); - $this->pushBlock($tags); - return true; - } else { - $this->seek($s); - } - - // closing a block - if ($this->literal('}', false)) { - try { - $block = $this->pop(); - } catch (exception $e) { - $this->seek($s); - $this->throwError($e->getMessage()); - } - - $hidden = false; - if (is_null($block->type)) { - $hidden = true; - if (!isset($block->args)) { - foreach ($block->tags as $tag) { - if (!is_string($tag) || $tag{0} != $this->lessc->mPrefix) { - $hidden = false; - break; - } - } - } - - foreach ($block->tags as $tag) { - if (is_string($tag)) { - $this->env->children[$tag][] = $block; - } - } - } - - if (!$hidden) { - $this->append(array('block', $block), $s); - } - - // this is done here so comments aren't bundled into he block that - // was just closed - $this->whitespace(); - return true; - } - - // mixin - if ($this->mixinTags($tags) && - ($this->argumentDef($argv, $isVararg) || true) && - ($this->keyword($suffix) || true) && $this->end()) - { - $tags = $this->fixTags($tags); - $this->append(array('mixin', $tags, $argv, $suffix), $s); - return true; - } else { - $this->seek($s); - } - - // spare ; - if ($this->literal(';')) return true; - - return false; // got nothing, throw error - } - - protected function isDirective($dirname, $directives) { - // TODO: cache pattern in parser - $pattern = implode("|", - array_map(array("lessc", "preg_quote"), $directives)); - $pattern = '/^(-[a-z-]+-)?(' . $pattern . ')$/i'; - - return preg_match($pattern, $dirname); - } - - protected function fixTags($tags) { - // move @ tags out of variable namespace - foreach ($tags as &$tag) { - if ($tag{0} == $this->lessc->vPrefix) - $tag[0] = $this->lessc->mPrefix; - } - return $tags; - } - - // a list of expressions - protected function expressionList(&$exps) { - $values = array(); - - while ($this->expression($exp)) { - $values[] = $exp; - } - - if (count($values) == 0) return false; - - $exps = lessc::compressList($values, ' '); - return true; - } - - /** - * Attempt to consume an expression. - * @link http://en.wikipedia.org/wiki/Operator-precedence_parser#Pseudo-code - */ - protected function expression(&$out) { - if ($this->value($lhs)) { - $out = $this->expHelper($lhs, 0); - - // look for / shorthand - if (!empty($this->env->supressedDivision)) { - unset($this->env->supressedDivision); - $s = $this->seek(); - if ($this->literal("/") && $this->value($rhs)) { - $out = array("list", "", - array($out, array("keyword", "/"), $rhs)); - } else { - $this->seek($s); - } - } - - return true; - } - return false; - } - - /** - * recursively parse infix equation with $lhs at precedence $minP - */ - protected function expHelper($lhs, $minP) { - $this->inExp = true; - $ss = $this->seek(); - - while (true) { - $whiteBefore = isset($this->buffer[$this->count - 1]) && - ctype_space($this->buffer[$this->count - 1]); - - // If there is whitespace before the operator, then we require - // whitespace after the operator for it to be an expression - $needWhite = $whiteBefore && !$this->inParens; - - if ($this->match(self::$operatorString.($needWhite ? '\s' : ''), $m) && self::$precedence[$m[1]] >= $minP) { - if (!$this->inParens && isset($this->env->currentProperty) && $m[1] == "/" && empty($this->env->supressedDivision)) { - foreach (self::$supressDivisionProps as $pattern) { - if (preg_match($pattern, $this->env->currentProperty)) { - $this->env->supressedDivision = true; - break 2; - } - } - } - - - $whiteAfter = isset($this->buffer[$this->count - 1]) && - ctype_space($this->buffer[$this->count - 1]); - - if (!$this->value($rhs)) break; - - // peek for next operator to see what to do with rhs - if ($this->peek(self::$operatorString, $next) && self::$precedence[$next[1]] > self::$precedence[$m[1]]) { - $rhs = $this->expHelper($rhs, self::$precedence[$next[1]]); - } - - $lhs = array('expression', $m[1], $lhs, $rhs, $whiteBefore, $whiteAfter); - $ss = $this->seek(); - - continue; - } - - break; - } - - $this->seek($ss); - - return $lhs; - } - - // consume a list of values for a property - public function propertyValue(&$value, $keyName = null) { - $values = array(); - - if ($keyName !== null) $this->env->currentProperty = $keyName; - - $s = null; - while ($this->expressionList($v)) { - $values[] = $v; - $s = $this->seek(); - if (!$this->literal(',')) break; - } - - if ($s) $this->seek($s); - - if ($keyName !== null) unset($this->env->currentProperty); - - if (count($values) == 0) return false; - - $value = lessc::compressList($values, ', '); - return true; - } - - protected function parenValue(&$out) { - $s = $this->seek(); - - // speed shortcut - if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "(") { - return false; - } - - $inParens = $this->inParens; - if ($this->literal("(") && - ($this->inParens = true) && $this->expression($exp) && - $this->literal(")")) - { - $out = $exp; - $this->inParens = $inParens; - return true; - } else { - $this->inParens = $inParens; - $this->seek($s); - } - - return false; - } - - // a single value - protected function value(&$value) { - $s = $this->seek(); - - // speed shortcut - if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "-") { - // negation - if ($this->literal("-", false) && - (($this->variable($inner) && $inner = array("variable", $inner)) || - $this->unit($inner) || - $this->parenValue($inner))) - { - $value = array("unary", "-", $inner); - return true; - } else { - $this->seek($s); - } - } - - if ($this->parenValue($value)) return true; - if ($this->unit($value)) return true; - if ($this->color($value)) return true; - if ($this->func($value)) return true; - if ($this->string($value)) return true; - - if ($this->keyword($word)) { - $value = array('keyword', $word); - return true; - } - - // try a variable - if ($this->variable($var)) { - $value = array('variable', $var); - return true; - } - - // unquote string (should this work on any type? - if ($this->literal("~") && $this->string($str)) { - $value = array("escape", $str); - return true; - } else { - $this->seek($s); - } - - // css hack: \0 - if ($this->literal('\\') && $this->match('([0-9]+)', $m)) { - $value = array('keyword', '\\'.$m[1]); - return true; - } else { - $this->seek($s); - } - - return false; - } - - // an import statement - protected function import(&$out) { - if (!$this->literal('@import')) return false; - - // @import "something.css" media; - // @import url("something.css") media; - // @import url(something.css) media; - - if ($this->propertyValue($value)) { - $out = array("import", $value); - return true; - } - } - - protected function mediaQueryList(&$out) { - if ($this->genericList($list, "mediaQuery", ",", false)) { - $out = $list[2]; - return true; - } - return false; - } - - protected function mediaQuery(&$out) { - $s = $this->seek(); - - $expressions = null; - $parts = array(); - - if (($this->literal("only") && ($only = true) || $this->literal("not") && ($not = true) || true) && $this->keyword($mediaType)) { - $prop = array("mediaType"); - if (isset($only)) $prop[] = "only"; - if (isset($not)) $prop[] = "not"; - $prop[] = $mediaType; - $parts[] = $prop; - } else { - $this->seek($s); - } - - - if (!empty($mediaType) && !$this->literal("and")) { - // ~ - } else { - $this->genericList($expressions, "mediaExpression", "and", false); - if (is_array($expressions)) $parts = array_merge($parts, $expressions[2]); - } - - if (count($parts) == 0) { - $this->seek($s); - return false; - } - - $out = $parts; - return true; - } - - protected function mediaExpression(&$out) { - $s = $this->seek(); - $value = null; - if ($this->literal("(") && - $this->keyword($feature) && - ($this->literal(":") && $this->expression($value) || true) && - $this->literal(")")) - { - $out = array("mediaExp", $feature); - if ($value) $out[] = $value; - return true; - } elseif ($this->variable($variable)) { - $out = array('variable', $variable); - return true; - } - - $this->seek($s); - return false; - } - - // an unbounded string stopped by $end - protected function openString($end, &$out, $nestingOpen=null, $rejectStrs = null) { - $oldWhite = $this->eatWhiteDefault; - $this->eatWhiteDefault = false; - - $stop = array("'", '"', "@{", $end); - $stop = array_map(array("lessc", "preg_quote"), $stop); - // $stop[] = self::$commentMulti; - - if (!is_null($rejectStrs)) { - $stop = array_merge($stop, $rejectStrs); - } - - $patt = '(.*?)('.implode("|", $stop).')'; - - $nestingLevel = 0; - - $content = array(); - while ($this->match($patt, $m, false)) { - if (!empty($m[1])) { - $content[] = $m[1]; - if ($nestingOpen) { - $nestingLevel += substr_count($m[1], $nestingOpen); - } - } - - $tok = $m[2]; - - $this->count-= strlen($tok); - if ($tok == $end) { - if ($nestingLevel == 0) { - break; - } else { - $nestingLevel--; - } - } - - if (($tok == "'" || $tok == '"') && $this->string($str)) { - $content[] = $str; - continue; - } - - if ($tok == "@{" && $this->interpolation($inter)) { - $content[] = $inter; - continue; - } - - if (!empty($rejectStrs) && in_array($tok, $rejectStrs)) { - break; - } - - $content[] = $tok; - $this->count+= strlen($tok); - } - - $this->eatWhiteDefault = $oldWhite; - - if (count($content) == 0) return false; - - // trim the end - if (is_string(end($content))) { - $content[count($content) - 1] = rtrim(end($content)); - } - - $out = array("string", "", $content); - return true; - } - - protected function string(&$out) { - $s = $this->seek(); - if ($this->literal('"', false)) { - $delim = '"'; - } elseif ($this->literal("'", false)) { - $delim = "'"; - } else { - return false; - } - - $content = array(); - - // look for either ending delim , escape, or string interpolation - $patt = '([^\n]*?)(@\{|\\\\|' . - lessc::preg_quote($delim).')'; - - $oldWhite = $this->eatWhiteDefault; - $this->eatWhiteDefault = false; - - while ($this->match($patt, $m, false)) { - $content[] = $m[1]; - if ($m[2] == "@{") { - $this->count -= strlen($m[2]); - if ($this->interpolation($inter, false)) { - $content[] = $inter; - } else { - $this->count += strlen($m[2]); - $content[] = "@{"; // ignore it - } - } elseif ($m[2] == '\\') { - $content[] = $m[2]; - if ($this->literal($delim, false)) { - $content[] = $delim; - } - } else { - $this->count -= strlen($delim); - break; // delim - } - } - - $this->eatWhiteDefault = $oldWhite; - - if ($this->literal($delim)) { - $out = array("string", $delim, $content); - return true; - } - - $this->seek($s); - return false; - } - - protected function interpolation(&$out) { - $oldWhite = $this->eatWhiteDefault; - $this->eatWhiteDefault = true; - - $s = $this->seek(); - if ($this->literal("@{") && - $this->openString("}", $interp, null, array("'", '"', ";")) && - $this->literal("}", false)) - { - $out = array("interpolate", $interp); - $this->eatWhiteDefault = $oldWhite; - if ($this->eatWhiteDefault) $this->whitespace(); - return true; - } - - $this->eatWhiteDefault = $oldWhite; - $this->seek($s); - return false; - } - - protected function unit(&$unit) { - // speed shortcut - if (isset($this->buffer[$this->count])) { - $char = $this->buffer[$this->count]; - if (!ctype_digit($char) && $char != ".") return false; - } - - if ($this->match('([0-9]+(?:\.[0-9]*)?|\.[0-9]+)([%a-zA-Z]+)?', $m)) { - $unit = array("number", $m[1], empty($m[2]) ? "" : $m[2]); - return true; - } - return false; - } - - // a # color - protected function color(&$out) { - if ($this->match('(#(?:[0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{3}))', $m)) { - if (strlen($m[1]) > 7) { - $out = array("string", "", array($m[1])); - } else { - $out = array("raw_color", $m[1]); - } - return true; - } - - return false; - } - - // consume an argument definition list surrounded by () - // each argument is a variable name with optional value - // or at the end a ... or a variable named followed by ... - // arguments are separated by , unless a ; is in the list, then ; is the - // delimiter. - protected function argumentDef(&$args, &$isVararg) { - $s = $this->seek(); - if (!$this->literal('(')) return false; - - $values = array(); - $delim = ","; - $method = "expressionList"; - - $isVararg = false; - while (true) { - if ($this->literal("...")) { - $isVararg = true; - break; - } - - if ($this->$method($value)) { - if ($value[0] == "variable") { - $arg = array("arg", $value[1]); - $ss = $this->seek(); - - if ($this->assign() && $this->$method($rhs)) { - $arg[] = $rhs; - } else { - $this->seek($ss); - if ($this->literal("...")) { - $arg[0] = "rest"; - $isVararg = true; - } - } - - $values[] = $arg; - if ($isVararg) break; - continue; - } else { - $values[] = array("lit", $value); - } - } - - - if (!$this->literal($delim)) { - if ($delim == "," && $this->literal(";")) { - // found new delim, convert existing args - $delim = ";"; - $method = "propertyValue"; - - // transform arg list - if (isset($values[1])) { // 2 items - $newList = array(); - foreach ($values as $i => $arg) { - switch($arg[0]) { - case "arg": - if ($i) { - $this->throwError("Cannot mix ; and , as delimiter types"); - } - $newList[] = $arg[2]; - break; - case "lit": - $newList[] = $arg[1]; - break; - case "rest": - $this->throwError("Unexpected rest before semicolon"); - } - } - - $newList = array("list", ", ", $newList); - - switch ($values[0][0]) { - case "arg": - $newArg = array("arg", $values[0][1], $newList); - break; - case "lit": - $newArg = array("lit", $newList); - break; - } - - } elseif ($values) { // 1 item - $newArg = $values[0]; - } - - if ($newArg) { - $values = array($newArg); - } - } else { - break; - } - } - } - - if (!$this->literal(')')) { - $this->seek($s); - return false; - } - - $args = $values; - - return true; - } - - // consume a list of tags - // this accepts a hanging delimiter - protected function tags(&$tags, $simple = false, $delim = ',') { - $tags = array(); - while ($this->tag($tt, $simple)) { - $tags[] = $tt; - if (!$this->literal($delim)) break; - } - if (count($tags) == 0) return false; - - return true; - } - - // list of tags of specifying mixin path - // optionally separated by > (lazy, accepts extra >) - protected function mixinTags(&$tags) { - $tags = array(); - while ($this->tag($tt, true)) { - $tags[] = $tt; - $this->literal(">"); - } - - if (count($tags) == 0) return false; - - return true; - } - - // a bracketed value (contained within in a tag definition) - protected function tagBracket(&$parts, &$hasExpression) { - // speed shortcut - if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] != "[") { - return false; - } - - $s = $this->seek(); - - $hasInterpolation = false; - - if ($this->literal("[", false)) { - $attrParts = array("["); - // keyword, string, operator - while (true) { - if ($this->literal("]", false)) { - $this->count--; - break; // get out early - } - - if ($this->match('\s+', $m)) { - $attrParts[] = " "; - continue; - } - if ($this->string($str)) { - // escape parent selector, (yuck) - foreach ($str[2] as &$chunk) { - $chunk = str_replace($this->lessc->parentSelector, "$&$", $chunk); - } - - $attrParts[] = $str; - $hasInterpolation = true; - continue; - } - - if ($this->keyword($word)) { - $attrParts[] = $word; - continue; - } - - if ($this->interpolation($inter, false)) { - $attrParts[] = $inter; - $hasInterpolation = true; - continue; - } - - // operator, handles attr namespace too - if ($this->match('[|-~\$\*\^=]+', $m)) { - $attrParts[] = $m[0]; - continue; - } - - break; - } - - if ($this->literal("]", false)) { - $attrParts[] = "]"; - foreach ($attrParts as $part) { - $parts[] = $part; - } - $hasExpression = $hasExpression || $hasInterpolation; - return true; - } - $this->seek($s); - } - - $this->seek($s); - return false; - } - - // a space separated list of selectors - protected function tag(&$tag, $simple = false) { - if ($simple) - $chars = '^@,:;{}\][>\(\) "\''; - else - $chars = '^@,;{}["\''; - - $s = $this->seek(); - - $hasExpression = false; - $parts = array(); - while ($this->tagBracket($parts, $hasExpression)); - - $oldWhite = $this->eatWhiteDefault; - $this->eatWhiteDefault = false; - - while (true) { - if ($this->match('(['.$chars.'0-9]['.$chars.']*)', $m)) { - $parts[] = $m[1]; - if ($simple) break; - - while ($this->tagBracket($parts, $hasExpression)); - continue; - } - - if (isset($this->buffer[$this->count]) && $this->buffer[$this->count] == "@") { - if ($this->interpolation($interp)) { - $hasExpression = true; - $interp[2] = true; // don't unescape - $parts[] = $interp; - continue; - } - - if ($this->literal("@")) { - $parts[] = "@"; - continue; - } - } - - if ($this->unit($unit)) { // for keyframes - $parts[] = $unit[1]; - $parts[] = $unit[2]; - continue; - } - - break; - } - - $this->eatWhiteDefault = $oldWhite; - if (!$parts) { - $this->seek($s); - return false; - } - - if ($hasExpression) { - $tag = array("exp", array("string", "", $parts)); - } else { - $tag = trim(implode($parts)); - } - - $this->whitespace(); - return true; - } - - // a css function - protected function func(&$func) { - $s = $this->seek(); - - if ($this->match('(%|[\w\-_][\w\-_:\.]+|[\w_])', $m) && $this->literal('(')) { - $fname = $m[1]; - - $sPreArgs = $this->seek(); - - $args = array(); - while (true) { - $ss = $this->seek(); - // this ugly nonsense is for ie filter properties - if ($this->keyword($name) && $this->literal('=') && $this->expressionList($value)) { - $args[] = array("string", "", array($name, "=", $value)); - } else { - $this->seek($ss); - if ($this->expressionList($value)) { - $args[] = $value; - } - } - - if (!$this->literal(',')) break; - } - $args = array('list', ',', $args); - - if ($this->literal(')')) { - $func = array('function', $fname, $args); - return true; - } elseif ($fname == 'url') { - // couldn't parse and in url? treat as string - $this->seek($sPreArgs); - if ($this->openString(")", $string) && $this->literal(")")) { - $func = array('function', $fname, $string); - return true; - } - } - } - - $this->seek($s); - return false; - } - - // consume a less variable - protected function variable(&$name) { - $s = $this->seek(); - if ($this->literal($this->lessc->vPrefix, false) && - ($this->variable($sub) || $this->keyword($name))) - { - if (!empty($sub)) { - $name = array('variable', $sub); - } else { - $name = $this->lessc->vPrefix.$name; - } - return true; - } - - $name = null; - $this->seek($s); - return false; - } - - /** - * Consume an assignment operator - * Can optionally take a name that will be set to the current property name - */ - protected function assign($name = null) { - if ($name) $this->currentProperty = $name; - return $this->literal(':') || $this->literal('='); - } - - // consume a keyword - protected function keyword(&$word) { - if ($this->match('([\w_\-\*!"][\w\-_"]*)', $m)) { - $word = $m[1]; - return true; - } - return false; - } - - // consume an end of statement delimiter - protected function end() { - if ($this->literal(';', false)) { - return true; - } elseif ($this->count == strlen($this->buffer) || $this->buffer[$this->count] == '}') { - // if there is end of file or a closing block next then we don't need a ; - return true; - } - return false; - } - - protected function guards(&$guards) { - $s = $this->seek(); - - if (!$this->literal("when")) { - $this->seek($s); - return false; - } - - $guards = array(); - - while ($this->guardGroup($g)) { - $guards[] = $g; - if (!$this->literal(",")) break; - } - - if (count($guards) == 0) { - $guards = null; - $this->seek($s); - return false; - } - - return true; - } - - // a bunch of guards that are and'd together - // TODO rename to guardGroup - protected function guardGroup(&$guardGroup) { - $s = $this->seek(); - $guardGroup = array(); - while ($this->guard($guard)) { - $guardGroup[] = $guard; - if (!$this->literal("and")) break; - } - - if (count($guardGroup) == 0) { - $guardGroup = null; - $this->seek($s); - return false; - } - - return true; - } - - protected function guard(&$guard) { - $s = $this->seek(); - $negate = $this->literal("not"); - - if ($this->literal("(") && $this->expression($exp) && $this->literal(")")) { - $guard = $exp; - if ($negate) $guard = array("negate", $guard); - return true; - } - - $this->seek($s); - return false; - } - - /* raw parsing functions */ - - protected function literal($what, $eatWhitespace = null) { - if ($eatWhitespace === null) $eatWhitespace = $this->eatWhiteDefault; - - // shortcut on single letter - if (!isset($what[1]) && isset($this->buffer[$this->count])) { - if ($this->buffer[$this->count] == $what) { - if (!$eatWhitespace) { - $this->count++; - return true; - } - // goes below... - } else { - return false; - } - } - - if (!isset(self::$literalCache[$what])) { - self::$literalCache[$what] = lessc::preg_quote($what); - } - - return $this->match(self::$literalCache[$what], $m, $eatWhitespace); - } - - protected function genericList(&$out, $parseItem, $delim="", $flatten=true) { - $s = $this->seek(); - $items = array(); - while ($this->$parseItem($value)) { - $items[] = $value; - if ($delim) { - if (!$this->literal($delim)) break; - } - } - - if (count($items) == 0) { - $this->seek($s); - return false; - } - - if ($flatten && count($items) == 1) { - $out = $items[0]; - } else { - $out = array("list", $delim, $items); - } - - return true; - } - - - // advance counter to next occurrence of $what - // $until - don't include $what in advance - // $allowNewline, if string, will be used as valid char set - protected function to($what, &$out, $until = false, $allowNewline = false) { - if (is_string($allowNewline)) { - $validChars = $allowNewline; - } else { - $validChars = $allowNewline ? "." : "[^\n]"; - } - if (!$this->match('('.$validChars.'*?)'.lessc::preg_quote($what), $m, !$until)) return false; - if ($until) $this->count -= strlen($what); // give back $what - $out = $m[1]; - return true; - } - - // try to match something on head of buffer - protected function match($regex, &$out, $eatWhitespace = null) { - if ($eatWhitespace === null) $eatWhitespace = $this->eatWhiteDefault; - - $r = '/'.$regex.($eatWhitespace && !$this->writeComments ? '\s*' : '').'/Ais'; - if (preg_match($r, $this->buffer, $out, null, $this->count)) { - $this->count += strlen($out[0]); - if ($eatWhitespace && $this->writeComments) $this->whitespace(); - return true; - } - return false; - } - - // match some whitespace - protected function whitespace() { - if ($this->writeComments) { - $gotWhite = false; - while (preg_match(self::$whitePattern, $this->buffer, $m, null, $this->count)) { - if (isset($m[1]) && empty($this->seenComments[$this->count])) { - $this->append(array("comment", $m[1])); - $this->seenComments[$this->count] = true; - } - $this->count += strlen($m[0]); - $gotWhite = true; - } - return $gotWhite; - } else { - $this->match("", $m); - return strlen($m[0]) > 0; - } - } - - // match something without consuming it - protected function peek($regex, &$out = null, $from=null) { - if (is_null($from)) $from = $this->count; - $r = '/'.$regex.'/Ais'; - $result = preg_match($r, $this->buffer, $out, null, $from); - - return $result; - } - - // seek to a spot in the buffer or return where we are on no argument - protected function seek($where = null) { - if ($where === null) return $this->count; - else $this->count = $where; - return true; - } - - /* misc functions */ - - public function throwError($msg = "parse error", $count = null) { - $count = is_null($count) ? $this->count : $count; - - $line = $this->line + - substr_count(substr($this->buffer, 0, $count), "\n"); - - if (!empty($this->sourceName)) { - $loc = "$this->sourceName on line $line"; - } else { - $loc = "line: $line"; - } - - // TODO this depends on $this->count - if ($this->peek("(.*?)(\n|$)", $m, $count)) { - throw new exception("$msg: failed at `$m[1]` $loc"); - } else { - throw new exception("$msg: $loc"); - } - } - - protected function pushBlock($selectors=null, $type=null) { - $b = new stdclass; - $b->parent = $this->env; - - $b->type = $type; - $b->id = self::$nextBlockId++; - - $b->isVararg = false; // TODO: kill me from here - $b->tags = $selectors; - - $b->props = array(); - $b->children = array(); - - $this->env = $b; - return $b; - } - - // push a block that doesn't multiply tags - protected function pushSpecialBlock($type) { - return $this->pushBlock(null, $type); - } - - // append a property to the current block - protected function append($prop, $pos = null) { - if ($pos !== null) $prop[-1] = $pos; - $this->env->props[] = $prop; - } - - // pop something off the stack - protected function pop() { - $old = $this->env; - $this->env = $this->env->parent; - return $old; - } - - // remove comments from $text - // todo: make it work for all functions, not just url - protected function removeComments($text) { - $look = array( - 'url(', '//', '/*', '"', "'" - ); - - $out = ''; - $min = null; - while (true) { - // find the next item - foreach ($look as $token) { - $pos = strpos($text, $token); - if ($pos !== false) { - if (!isset($min) || $pos < $min[1]) $min = array($token, $pos); - } - } - - if (is_null($min)) break; - - $count = $min[1]; - $skip = 0; - $newlines = 0; - switch ($min[0]) { - case 'url(': - if (preg_match('/url\(.*?\)/', $text, $m, 0, $count)) - $count += strlen($m[0]) - strlen($min[0]); - break; - case '"': - case "'": - if (preg_match('/'.$min[0].'.*?(?<!\\\\)'.$min[0].'/', $text, $m, 0, $count)) - $count += strlen($m[0]) - 1; - break; - case '//': - $skip = strpos($text, "\n", $count); - if ($skip === false) $skip = strlen($text) - $count; - else $skip -= $count; - break; - case '/*': - if (preg_match('/\/\*.*?\*\//s', $text, $m, 0, $count)) { - $skip = strlen($m[0]); - $newlines = substr_count($m[0], "\n"); - } - break; - } - - if ($skip == 0) $count += strlen($min[0]); - - $out .= substr($text, 0, $count).str_repeat("\n", $newlines); - $text = substr($text, $count + $skip); - - $min = null; - } - - return $out.$text; - } - -} - -class lessc_formatter_classic { - public $indentChar = " "; - - public $break = "\n"; - public $open = " {"; - public $close = "}"; - public $selectorSeparator = ", "; - public $assignSeparator = ":"; - - public $openSingle = " { "; - public $closeSingle = " }"; - - public $disableSingle = false; - public $breakSelectors = false; - - public $compressColors = false; - - public function __construct() { - $this->indentLevel = 0; - } - - public function indentStr($n = 0) { - return str_repeat($this->indentChar, max($this->indentLevel + $n, 0)); - } - - public function property($name, $value) { - return $name . $this->assignSeparator . $value . ";"; - } - - protected function isEmpty($block) { - if (empty($block->lines)) { - foreach ($block->children as $child) { - if (!$this->isEmpty($child)) return false; - } - - return true; - } - return false; - } - - public function block($block) { - if ($this->isEmpty($block)) return; - - $inner = $pre = $this->indentStr(); - - $isSingle = !$this->disableSingle && - is_null($block->type) && count($block->lines) == 1; - - if (!empty($block->selectors)) { - $this->indentLevel++; - - if ($this->breakSelectors) { - $selectorSeparator = $this->selectorSeparator . $this->break . $pre; - } else { - $selectorSeparator = $this->selectorSeparator; - } - - echo $pre . - implode($selectorSeparator, $block->selectors); - if ($isSingle) { - echo $this->openSingle; - $inner = ""; - } else { - echo $this->open . $this->break; - $inner = $this->indentStr(); - } - - } - - if (!empty($block->lines)) { - $glue = $this->break.$inner; - echo $inner . implode($glue, $block->lines); - if (!$isSingle && !empty($block->children)) { - echo $this->break; - } - } - - foreach ($block->children as $child) { - $this->block($child); - } - - if (!empty($block->selectors)) { - if (!$isSingle && empty($block->children)) echo $this->break; - - if ($isSingle) { - echo $this->closeSingle . $this->break; - } else { - echo $pre . $this->close . $this->break; - } - - $this->indentLevel--; - } - } -} - -class lessc_formatter_compressed extends lessc_formatter_classic { - public $disableSingle = true; - public $open = "{"; - public $selectorSeparator = ","; - public $assignSeparator = ":"; - public $break = ""; - public $compressColors = true; - - public function indentStr($n = 0) { - return ""; - } -} - -class lessc_formatter_lessjs extends lessc_formatter_classic { - public $disableSingle = true; - public $breakSelectors = true; - public $assignSeparator = ": "; - public $selectorSeparator = ","; -} - - |