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-rw-r--r--lib/less.php/Parser.php2816
1 files changed, 2816 insertions, 0 deletions
diff --git a/lib/less.php/Parser.php b/lib/less.php/Parser.php
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+<?php
+
+require_once( dirname(__FILE__).'/Cache.php');
+
+/**
+ * Class for parsing and compiling less files into css
+ *
+ * @package Less
+ * @subpackage parser
+ *
+ */
+class Less_Parser{
+
+
+ /**
+ * Default parser options
+ */
+ public static $default_options = array(
+ 'compress' => false, // option - whether to compress
+ 'strictUnits' => false, // whether units need to evaluate correctly
+ 'strictMath' => false, // whether math has to be within parenthesis
+ 'relativeUrls' => true, // option - whether to adjust URL's to be relative
+ 'urlArgs' => '', // whether to add args into url tokens
+ 'numPrecision' => 8,
+
+ 'import_dirs' => array(),
+ 'import_callback' => null,
+ 'cache_dir' => null,
+ 'cache_method' => 'php', // false, 'serialize', 'php', 'var_export', 'callback';
+ 'cache_callback_get' => null,
+ 'cache_callback_set' => null,
+
+ 'sourceMap' => false, // whether to output a source map
+ 'sourceMapBasepath' => null,
+ 'sourceMapWriteTo' => null,
+ 'sourceMapURL' => null,
+
+ 'indentation' => ' ',
+
+ 'plugins' => array(),
+
+ );
+
+ public static $options = array();
+
+
+ private $input; // Less input string
+ private $input_len; // input string length
+ private $pos; // current index in `input`
+ private $saveStack = array(); // holds state for backtracking
+ private $furthest;
+ private $mb_internal_encoding = ''; // for remember exists value of mbstring.internal_encoding
+
+ /**
+ * @var Less_Environment
+ */
+ private $env;
+
+ protected $rules = array();
+
+ private static $imports = array();
+
+ public static $has_extends = false;
+
+ public static $next_id = 0;
+
+ /**
+ * Filename to contents of all parsed the files
+ *
+ * @var array
+ */
+ public static $contentsMap = array();
+
+
+ /**
+ * @param Less_Environment|array|null $env
+ */
+ public function __construct( $env = null ){
+
+ // Top parser on an import tree must be sure there is one "env"
+ // which will then be passed around by reference.
+ if( $env instanceof Less_Environment ){
+ $this->env = $env;
+ }else{
+ $this->SetOptions(Less_Parser::$default_options);
+ $this->Reset( $env );
+ }
+
+ // mbstring.func_overload > 1 bugfix
+ // The encoding value must be set for each source file,
+ // therefore, to conserve resources and improve the speed of this design is taken here
+ if (ini_get('mbstring.func_overload')) {
+ $this->mb_internal_encoding = ini_get('mbstring.internal_encoding');
+ @ini_set('mbstring.internal_encoding', 'ascii');
+ }
+
+ }
+
+
+ /**
+ * Reset the parser state completely
+ *
+ */
+ public function Reset( $options = null ){
+ $this->rules = array();
+ self::$imports = array();
+ self::$has_extends = false;
+ self::$imports = array();
+ self::$contentsMap = array();
+
+ $this->env = new Less_Environment($options);
+
+ //set new options
+ if( is_array($options) ){
+ $this->SetOptions(Less_Parser::$default_options);
+ $this->SetOptions($options);
+ }
+
+ $this->env->Init();
+ }
+
+ /**
+ * Set one or more compiler options
+ * options: import_dirs, cache_dir, cache_method
+ *
+ */
+ public function SetOptions( $options ){
+ foreach($options as $option => $value){
+ $this->SetOption($option,$value);
+ }
+ }
+
+ /**
+ * Set one compiler option
+ *
+ */
+ public function SetOption($option,$value){
+
+ switch($option){
+
+ case 'import_dirs':
+ $this->SetImportDirs($value);
+ return;
+
+ case 'cache_dir':
+ if( is_string($value) ){
+ Less_Cache::SetCacheDir($value);
+ Less_Cache::CheckCacheDir();
+ }
+ return;
+ }
+
+ Less_Parser::$options[$option] = $value;
+ }
+
+ /**
+ * Registers a new custom function
+ *
+ * @param string $name function name
+ * @param callable $callback callback
+ */
+ public function registerFunction($name, $callback) {
+ $this->env->functions[$name] = $callback;
+ }
+
+ /**
+ * Removed an already registered function
+ *
+ * @param string $name function name
+ */
+ public function unregisterFunction($name) {
+ if( isset($this->env->functions[$name]) )
+ unset($this->env->functions[$name]);
+ }
+
+
+ /**
+ * Get the current css buffer
+ *
+ * @return string
+ */
+ public function getCss(){
+
+ $precision = ini_get('precision');
+ @ini_set('precision',16);
+ $locale = setlocale(LC_NUMERIC, 0);
+ setlocale(LC_NUMERIC, "C");
+
+ try {
+
+ $root = new Less_Tree_Ruleset(array(), $this->rules );
+ $root->root = true;
+ $root->firstRoot = true;
+
+
+ $this->PreVisitors($root);
+
+ self::$has_extends = false;
+ $evaldRoot = $root->compile($this->env);
+
+
+
+ $this->PostVisitors($evaldRoot);
+
+ if( Less_Parser::$options['sourceMap'] ){
+ $generator = new Less_SourceMap_Generator($evaldRoot, Less_Parser::$contentsMap, Less_Parser::$options );
+ // will also save file
+ // FIXME: should happen somewhere else?
+ $css = $generator->generateCSS();
+ }else{
+ $css = $evaldRoot->toCSS();
+ }
+
+ if( Less_Parser::$options['compress'] ){
+ $css = preg_replace('/(^(\s)+)|((\s)+$)/', '', $css);
+ }
+
+ } catch (Exception $exc) {
+ // Intentional fall-through so we can reset environment
+ }
+
+ //reset php settings
+ @ini_set('precision',$precision);
+ setlocale(LC_NUMERIC, $locale);
+
+ // If you previously defined $this->mb_internal_encoding
+ // is required to return the encoding as it was before
+ if ($this->mb_internal_encoding != '') {
+ @ini_set("mbstring.internal_encoding", $this->mb_internal_encoding);
+ $this->mb_internal_encoding = '';
+ }
+
+ // Rethrow exception after we handled resetting the environment
+ if (!empty($exc)) {
+ throw $exc;
+ }
+
+ return $css;
+ }
+
+ public function findValueOf($varName)
+ {
+ foreach($this->rules as $rule){
+ if(isset($rule->variable) && ($rule->variable == true) && (str_replace("@","",$rule->name) == $varName)){
+ return $this->getVariableValue($rule);
+ }
+ }
+ return null;
+ }
+
+ /**
+ *
+ * this function gets the private rules variable and returns an array of the found variables
+ * it uses a helper method getVariableValue() that contains the logic ot fetch the value from the rule object
+ *
+ * @return array
+ */
+ public function getVariables()
+ {
+ $variables = array();
+
+ $not_variable_type = array(
+ 'Comment', // this include less comments ( // ) and css comments (/* */)
+ 'Import', // do not search variables in included files @import
+ 'Ruleset', // selectors (.someclass, #someid, …)
+ 'Operation', //
+ );
+
+ // @TODO run compilation if not runned yet
+ foreach ($this->rules as $key => $rule) {
+ if (in_array($rule->type, $not_variable_type)) {
+ continue;
+ }
+
+ // Note: it seems rule->type is always Rule when variable = true
+ if ($rule->type == 'Rule' && $rule->variable) {
+ $variables[$rule->name] = $this->getVariableValue($rule);
+ } else {
+ if ($rule->type == 'Comment') {
+ $variables[] = $this->getVariableValue($rule);
+ }
+ }
+ }
+ return $variables;
+ }
+
+ public function findVarByName($var_name)
+ {
+ foreach($this->rules as $rule){
+ if(isset($rule->variable) && ($rule->variable == true)){
+ if($rule->name == $var_name){
+ return $this->getVariableValue($rule);
+ }
+ }
+ }
+ return null;
+ }
+
+ /**
+ *
+ * This method gets the value of the less variable from the rules object.
+ * Since the objects vary here we add the logic for extracting the css/less value.
+ *
+ * @param $var
+ *
+ * @return bool|string
+ */
+ private function getVariableValue($var)
+ {
+ if (!is_a($var, 'Less_Tree')) {
+ throw new Exception('var is not a Less_Tree object');
+ }
+
+ switch ($var->type) {
+ case 'Color':
+ return $this->rgb2html($var->rgb);
+ case 'Unit':
+ return $var->value. $var->unit->numerator[0];
+ case 'Variable':
+ return $this->findVarByName($var->name);
+ case 'Keyword':
+ return $var->value;
+ case 'Rule':
+ return $this->getVariableValue($var->value);
+ case 'Value':
+ $value = '';
+ foreach ($var->value as $sub_value) {
+ $value .= $this->getVariableValue($sub_value).' ';
+ }
+ return $value;
+ case 'Quoted':
+ return $var->quote.$var->value.$var->quote;
+ case 'Dimension':
+ $value = $var->value;
+ if ($var->unit && $var->unit->numerator) {
+ $value .= $var->unit->numerator[0];
+ }
+ return $value;
+ case 'Expression':
+ $value = "";
+ foreach($var->value as $item) {
+ $value .= $this->getVariableValue($item)." ";
+ }
+ return $value;
+ case 'Operation':
+ throw new Exception('getVariables() require Less to be compiled. please use $parser->getCss() before calling getVariables()');
+ case 'Comment':
+ case 'Import':
+ case 'Ruleset':
+ default:
+ throw new Exception("type missing in switch/case getVariableValue for ".$var->type);
+ }
+ return false;
+ }
+
+ private function rgb2html($r, $g=-1, $b=-1)
+ {
+ if (is_array($r) && sizeof($r) == 3)
+ list($r, $g, $b) = $r;
+
+ $r = intval($r); $g = intval($g);
+ $b = intval($b);
+
+ $r = dechex($r<0?0:($r>255?255:$r));
+ $g = dechex($g<0?0:($g>255?255:$g));
+ $b = dechex($b<0?0:($b>255?255:$b));
+
+ $color = (strlen($r) < 2?'0':'').$r;
+ $color .= (strlen($g) < 2?'0':'').$g;
+ $color .= (strlen($b) < 2?'0':'').$b;
+ return '#'.$color;
+ }
+
+ /**
+ * Run pre-compile visitors
+ *
+ */
+ private function PreVisitors($root){
+
+ if( Less_Parser::$options['plugins'] ){
+ foreach(Less_Parser::$options['plugins'] as $plugin){
+ if( !empty($plugin->isPreEvalVisitor) ){
+ $plugin->run($root);
+ }
+ }
+ }
+ }
+
+
+ /**
+ * Run post-compile visitors
+ *
+ */
+ private function PostVisitors($evaldRoot){
+
+ $visitors = array();
+ $visitors[] = new Less_Visitor_joinSelector();
+ if( self::$has_extends ){
+ $visitors[] = new Less_Visitor_processExtends();
+ }
+ $visitors[] = new Less_Visitor_toCSS();
+
+
+ if( Less_Parser::$options['plugins'] ){
+ foreach(Less_Parser::$options['plugins'] as $plugin){
+ if( property_exists($plugin,'isPreEvalVisitor') && $plugin->isPreEvalVisitor ){
+ continue;
+ }
+
+ if( property_exists($plugin,'isPreVisitor') && $plugin->isPreVisitor ){
+ array_unshift( $visitors, $plugin);
+ }else{
+ $visitors[] = $plugin;
+ }
+ }
+ }
+
+
+ for($i = 0; $i < count($visitors); $i++ ){
+ $visitors[$i]->run($evaldRoot);
+ }
+
+ }
+
+
+ /**
+ * Parse a Less string into css
+ *
+ * @param string $str The string to convert
+ * @param string $uri_root The url of the file
+ * @return Less_Tree_Ruleset|Less_Parser
+ */
+ public function parse( $str, $file_uri = null ){
+
+ if( !$file_uri ){
+ $uri_root = '';
+ $filename = 'anonymous-file-'.Less_Parser::$next_id++.'.less';
+ }else{
+ $file_uri = self::WinPath($file_uri);
+ $filename = $file_uri;
+ $uri_root = dirname($file_uri);
+ }
+
+ $previousFileInfo = $this->env->currentFileInfo;
+ $uri_root = self::WinPath($uri_root);
+ $this->SetFileInfo($filename, $uri_root);
+
+ $this->input = $str;
+ $this->_parse();
+
+ if( $previousFileInfo ){
+ $this->env->currentFileInfo = $previousFileInfo;
+ }
+
+ return $this;
+ }
+
+
+ /**
+ * Parse a Less string from a given file
+ *
+ * @throws Less_Exception_Parser
+ * @param string $filename The file to parse
+ * @param string $uri_root The url of the file
+ * @param bool $returnRoot Indicates whether the return value should be a css string a root node
+ * @return Less_Tree_Ruleset|Less_Parser
+ */
+ public function parseFile( $filename, $uri_root = '', $returnRoot = false){
+
+ if( !file_exists($filename) ){
+ $this->Error(sprintf('File `%s` not found.', $filename));
+ }
+
+
+ // fix uri_root?
+ // Instead of The mixture of file path for the first argument and directory path for the second argument has bee
+ if( !$returnRoot && !empty($uri_root) && basename($uri_root) == basename($filename) ){
+ $uri_root = dirname($uri_root);
+ }
+
+
+ $previousFileInfo = $this->env->currentFileInfo;
+
+
+ if( $filename ){
+ $filename = self::AbsPath($filename, true);
+ }
+ $uri_root = self::WinPath($uri_root);
+
+ $this->SetFileInfo($filename, $uri_root);
+
+ self::AddParsedFile($filename);
+
+ if( $returnRoot ){
+ $rules = $this->GetRules( $filename );
+ $return = new Less_Tree_Ruleset(array(), $rules );
+ }else{
+ $this->_parse( $filename );
+ $return = $this;
+ }
+
+ if( $previousFileInfo ){
+ $this->env->currentFileInfo = $previousFileInfo;
+ }
+
+ return $return;
+ }
+
+
+ /**
+ * Allows a user to set variables values
+ * @param array $vars
+ * @return Less_Parser
+ */
+ public function ModifyVars( $vars ){
+
+ $this->input = Less_Parser::serializeVars( $vars );
+ $this->_parse();
+
+ return $this;
+ }
+
+
+ /**
+ * @param string $filename
+ */
+ public function SetFileInfo( $filename, $uri_root = ''){
+
+ $filename = Less_Environment::normalizePath($filename);
+ $dirname = preg_replace('/[^\/\\\\]*$/','',$filename);
+
+ if( !empty($uri_root) ){
+ $uri_root = rtrim($uri_root,'/').'/';
+ }
+
+ $currentFileInfo = array();
+
+ //entry info
+ if( isset($this->env->currentFileInfo) ){
+ $currentFileInfo['entryPath'] = $this->env->currentFileInfo['entryPath'];
+ $currentFileInfo['entryUri'] = $this->env->currentFileInfo['entryUri'];
+ $currentFileInfo['rootpath'] = $this->env->currentFileInfo['rootpath'];
+
+ }else{
+ $currentFileInfo['entryPath'] = $dirname;
+ $currentFileInfo['entryUri'] = $uri_root;
+ $currentFileInfo['rootpath'] = $dirname;
+ }
+
+ $currentFileInfo['currentDirectory'] = $dirname;
+ $currentFileInfo['currentUri'] = $uri_root.basename($filename);
+ $currentFileInfo['filename'] = $filename;
+ $currentFileInfo['uri_root'] = $uri_root;
+
+
+ //inherit reference
+ if( isset($this->env->currentFileInfo['reference']) && $this->env->currentFileInfo['reference'] ){
+ $currentFileInfo['reference'] = true;
+ }
+
+ $this->env->currentFileInfo = $currentFileInfo;
+ }
+
+
+ /**
+ * @deprecated 1.5.1.2
+ *
+ */
+ public function SetCacheDir( $dir ){
+
+ if( !file_exists($dir) ){
+ if( mkdir($dir) ){
+ return true;
+ }
+ throw new Less_Exception_Parser('Less.php cache directory couldn\'t be created: '.$dir);
+
+ }elseif( !is_dir($dir) ){
+ throw new Less_Exception_Parser('Less.php cache directory doesn\'t exist: '.$dir);
+
+ }elseif( !is_writable($dir) ){
+ throw new Less_Exception_Parser('Less.php cache directory isn\'t writable: '.$dir);
+
+ }else{
+ $dir = self::WinPath($dir);
+ Less_Cache::$cache_dir = rtrim($dir,'/').'/';
+ return true;
+ }
+ }
+
+
+ /**
+ * Set a list of directories or callbacks the parser should use for determining import paths
+ *
+ * @param array $dirs
+ */
+ public function SetImportDirs( $dirs ){
+ Less_Parser::$options['import_dirs'] = array();
+
+ foreach($dirs as $path => $uri_root){
+
+ $path = self::WinPath($path);
+ if( !empty($path) ){
+ $path = rtrim($path,'/').'/';
+ }
+
+ if ( !is_callable($uri_root) ){
+ $uri_root = self::WinPath($uri_root);
+ if( !empty($uri_root) ){
+ $uri_root = rtrim($uri_root,'/').'/';
+ }
+ }
+
+ Less_Parser::$options['import_dirs'][$path] = $uri_root;
+ }
+ }
+
+ /**
+ * @param string $file_path
+ */
+ private function _parse( $file_path = null ){
+ $this->rules = array_merge($this->rules, $this->GetRules( $file_path ));
+ }
+
+
+ /**
+ * Return the results of parsePrimary for $file_path
+ * Use cache and save cached results if possible
+ *
+ * @param string|null $file_path
+ */
+ private function GetRules( $file_path ){
+
+ $this->SetInput($file_path);
+
+ $cache_file = $this->CacheFile( $file_path );
+ if( $cache_file ){
+ if( Less_Parser::$options['cache_method'] == 'callback' ){
+ if( is_callable(Less_Parser::$options['cache_callback_get']) ){
+ $cache = call_user_func_array(
+ Less_Parser::$options['cache_callback_get'],
+ array($this, $file_path, $cache_file)
+ );
+
+ if( $cache ){
+ $this->UnsetInput();
+ return $cache;
+ }
+ }
+
+ }elseif( file_exists($cache_file) ){
+ switch(Less_Parser::$options['cache_method']){
+
+ // Using serialize
+ // Faster but uses more memory
+ case 'serialize':
+ $cache = unserialize(file_get_contents($cache_file));
+ if( $cache ){
+ touch($cache_file);
+ $this->UnsetInput();
+ return $cache;
+ }
+ break;
+
+
+ // Using generated php code
+ case 'var_export':
+ case 'php':
+ $this->UnsetInput();
+ return include($cache_file);
+ }
+ }
+ }
+
+ $rules = $this->parsePrimary();
+
+ if( $this->pos < $this->input_len ){
+ throw new Less_Exception_Chunk($this->input, null, $this->furthest, $this->env->currentFileInfo);
+ }
+
+ $this->UnsetInput();
+
+
+ //save the cache
+ if( $cache_file ){
+ if( Less_Parser::$options['cache_method'] == 'callback' ){
+ if( is_callable(Less_Parser::$options['cache_callback_set']) ){
+ call_user_func_array(
+ Less_Parser::$options['cache_callback_set'],
+ array($this, $file_path, $cache_file, $rules)
+ );
+ }
+
+ }else{
+ //msg('write cache file');
+ switch(Less_Parser::$options['cache_method']){
+ case 'serialize':
+ file_put_contents( $cache_file, serialize($rules) );
+ break;
+ case 'php':
+ file_put_contents( $cache_file, '<?php return '.self::ArgString($rules).'; ?>' );
+ break;
+ case 'var_export':
+ //Requires __set_state()
+ file_put_contents( $cache_file, '<?php return '.var_export($rules,true).'; ?>' );
+ break;
+ }
+
+ Less_Cache::CleanCache();
+ }
+ }
+
+ return $rules;
+ }
+
+
+ /**
+ * Set up the input buffer
+ *
+ */
+ public function SetInput( $file_path ){
+
+ if( $file_path ){
+ $this->input = file_get_contents( $file_path );
+ }
+
+ $this->pos = $this->furthest = 0;
+
+ // Remove potential UTF Byte Order Mark
+ $this->input = preg_replace('/\\G\xEF\xBB\xBF/', '', $this->input);
+ $this->input_len = strlen($this->input);
+
+
+ if( Less_Parser::$options['sourceMap'] && $this->env->currentFileInfo ){
+ $uri = $this->env->currentFileInfo['currentUri'];
+ Less_Parser::$contentsMap[$uri] = $this->input;
+ }
+
+ }
+
+
+ /**
+ * Free up some memory
+ *
+ */
+ public function UnsetInput(){
+ unset($this->input, $this->pos, $this->input_len, $this->furthest);
+ $this->saveStack = array();
+ }
+
+
+ public function CacheFile( $file_path ){
+
+ if( $file_path && $this->CacheEnabled() ){
+
+ $env = get_object_vars($this->env);
+ unset($env['frames']);
+
+ $parts = array();
+ $parts[] = $file_path;
+ $parts[] = filesize( $file_path );
+ $parts[] = filemtime( $file_path );
+ $parts[] = $env;
+ $parts[] = Less_Version::cache_version;
+ $parts[] = Less_Parser::$options['cache_method'];
+ return Less_Cache::$cache_dir . Less_Cache::$prefix . base_convert( sha1(json_encode($parts) ), 16, 36) . '.lesscache';
+ }
+ }
+
+
+ static function AddParsedFile($file){
+ self::$imports[] = $file;
+ }
+
+ static function AllParsedFiles(){
+ return self::$imports;
+ }
+
+ /**
+ * @param string $file
+ */
+ static function FileParsed($file){
+ return in_array($file,self::$imports);
+ }
+
+
+ function save() {
+ $this->saveStack[] = $this->pos;
+ }
+
+ private function restore() {
+ $this->pos = array_pop($this->saveStack);
+ }
+
+ private function forget(){
+ array_pop($this->saveStack);
+ }
+
+ /**
+ * Determine if the character at the specified offset from the current position is a white space.
+ *
+ * @param int $offset
+ *
+ * @return bool
+ */
+ private function isWhitespace($offset = 0) {
+ return strpos(" \t\n\r\v\f", $this->input[$this->pos + $offset]) !== false;
+ }
+
+ /**
+ * Parse from a token, regexp or string, and move forward if match
+ *
+ * @param array $toks
+ * @return array
+ */
+ private function match($toks){
+
+ // The match is confirmed, add the match length to `this::pos`,
+ // and consume any extra white-space characters (' ' || '\n')
+ // which come after that. The reason for this is that LeSS's
+ // grammar is mostly white-space insensitive.
+ //
+
+ foreach($toks as $tok){
+
+ $char = $tok[0];
+
+ if( $char === '/' ){
+ $match = $this->MatchReg($tok);
+
+ if( $match ){
+ return count($match) === 1 ? $match[0] : $match;
+ }
+
+ }elseif( $char === '#' ){
+ $match = $this->MatchChar($tok[1]);
+
+ }else{
+ // Non-terminal, match using a function call
+ $match = $this->$tok();
+
+ }
+
+ if( $match ){
+ return $match;
+ }
+ }
+ }
+
+ /**
+ * @param string[] $toks
+ *
+ * @return string
+ */
+ private function MatchFuncs($toks){
+
+ if( $this->pos < $this->input_len ){
+ foreach($toks as $tok){
+ $match = $this->$tok();
+ if( $match ){
+ return $match;
+ }
+ }
+ }
+
+ }
+
+ // Match a single character in the input,
+ private function MatchChar($tok){
+ if( ($this->pos < $this->input_len) && ($this->input[$this->pos] === $tok) ){
+ $this->skipWhitespace(1);
+ return $tok;
+ }
+ }
+
+ // Match a regexp from the current start point
+ private function MatchReg($tok){
+
+ if( preg_match($tok, $this->input, $match, 0, $this->pos) ){
+ $this->skipWhitespace(strlen($match[0]));
+ return $match;
+ }
+ }
+
+
+ /**
+ * Same as match(), but don't change the state of the parser,
+ * just return the match.
+ *
+ * @param string $tok
+ * @return integer
+ */
+ public function PeekReg($tok){
+ return preg_match($tok, $this->input, $match, 0, $this->pos);
+ }
+
+ /**
+ * @param string $tok
+ */
+ public function PeekChar($tok){
+ //return ($this->input[$this->pos] === $tok );
+ return ($this->pos < $this->input_len) && ($this->input[$this->pos] === $tok );
+ }
+
+
+ /**
+ * @param integer $length
+ */
+ public function skipWhitespace($length){
+
+ $this->pos += $length;
+
+ for(; $this->pos < $this->input_len; $this->pos++ ){
+ $c = $this->input[$this->pos];
+
+ if( ($c !== "\n") && ($c !== "\r") && ($c !== "\t") && ($c !== ' ') ){
+ break;
+ }
+ }
+ }
+
+
+ /**
+ * @param string $tok
+ * @param string|null $msg
+ */
+ public function expect($tok, $msg = NULL) {
+ $result = $this->match( array($tok) );
+ if (!$result) {
+ $this->Error( $msg ? "Expected '" . $tok . "' got '" . $this->input[$this->pos] . "'" : $msg );
+ } else {
+ return $result;
+ }
+ }
+
+ /**
+ * @param string $tok
+ */
+ public function expectChar($tok, $msg = null ){
+ $result = $this->MatchChar($tok);
+ if( !$result ){
+ $msg = $msg ? $msg : "Expected '" . $tok . "' got '" . $this->input[$this->pos] . "'";
+ $this->Error( $msg );
+ }else{
+ return $result;
+ }
+ }
+
+ //
+ // Here in, the parsing rules/functions
+ //
+ // The basic structure of the syntax tree generated is as follows:
+ //
+ // Ruleset -> Rule -> Value -> Expression -> Entity
+ //
+ // Here's some LESS code:
+ //
+ // .class {
+ // color: #fff;
+ // border: 1px solid #000;
+ // width: @w + 4px;
+ // > .child {...}
+ // }
+ //
+ // And here's what the parse tree might look like:
+ //
+ // Ruleset (Selector '.class', [
+ // Rule ("color", Value ([Expression [Color #fff]]))
+ // Rule ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]]))
+ // Rule ("width", Value ([Expression [Operation "+" [Variable "@w"][Dimension 4px]]]))
+ // Ruleset (Selector [Element '>', '.child'], [...])
+ // ])
+ //
+ // In general, most rules will try to parse a token with the `$()` function, and if the return
+ // value is truly, will return a new node, of the relevant type. Sometimes, we need to check
+ // first, before parsing, that's when we use `peek()`.
+ //
+
+ //
+ // The `primary` rule is the *entry* and *exit* point of the parser.
+ // The rules here can appear at any level of the parse tree.
+ //
+ // The recursive nature of the grammar is an interplay between the `block`
+ // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,
+ // as represented by this simplified grammar:
+ //
+ // primary → (ruleset | rule)+
+ // ruleset → selector+ block
+ // block → '{' primary '}'
+ //
+ // Only at one point is the primary rule not called from the
+ // block rule: at the root level.
+ //
+ private function parsePrimary(){
+ $root = array();
+
+ while( true ){
+
+ if( $this->pos >= $this->input_len ){
+ break;
+ }
+
+ $node = $this->parseExtend(true);
+ if( $node ){
+ $root = array_merge($root,$node);
+ continue;
+ }
+
+ //$node = $this->MatchFuncs( array( 'parseMixinDefinition', 'parseRule', 'parseRuleset', 'parseMixinCall', 'parseComment', 'parseDirective'));
+ $node = $this->MatchFuncs( array( 'parseMixinDefinition', 'parseNameValue', 'parseRule', 'parseRuleset', 'parseMixinCall', 'parseComment', 'parseRulesetCall', 'parseDirective'));
+
+ if( $node ){
+ $root[] = $node;
+ }elseif( !$this->MatchReg('/\\G[\s\n;]+/') ){
+ break;
+ }
+
+ if( $this->PeekChar('}') ){
+ break;
+ }
+ }
+
+ return $root;
+ }
+
+
+
+ // We create a Comment node for CSS comments `/* */`,
+ // but keep the LeSS comments `//` silent, by just skipping
+ // over them.
+ private function parseComment(){
+
+ if( $this->input[$this->pos] !== '/' ){
+ return;
+ }
+
+ if( $this->input[$this->pos+1] === '/' ){
+ $match = $this->MatchReg('/\\G\/\/.*/');
+ return $this->NewObj4('Less_Tree_Comment',array($match[0], true, $this->pos, $this->env->currentFileInfo));
+ }
+
+ //$comment = $this->MatchReg('/\\G\/\*(?:[^*]|\*+[^\/*])*\*+\/\n?/');
+ $comment = $this->MatchReg('/\\G\/\*(?s).*?\*+\/\n?/');//not the same as less.js to prevent fatal errors
+ if( $comment ){
+ return $this->NewObj4('Less_Tree_Comment',array($comment[0], false, $this->pos, $this->env->currentFileInfo));
+ }
+ }
+
+ private function parseComments(){
+ $comments = array();
+
+ while( $this->pos < $this->input_len ){
+ $comment = $this->parseComment();
+ if( !$comment ){
+ break;
+ }
+
+ $comments[] = $comment;
+ }
+
+ return $comments;
+ }
+
+
+
+ //
+ // A string, which supports escaping " and '
+ //
+ // "milky way" 'he\'s the one!'
+ //
+ private function parseEntitiesQuoted() {
+ $j = $this->pos;
+ $e = false;
+ $index = $this->pos;
+
+ if( $this->input[$this->pos] === '~' ){
+ $j++;
+ $e = true; // Escaped strings
+ }
+
+ $char = $this->input[$j];
+ if( $char !== '"' && $char !== "'" ){
+ return;
+ }
+
+ if ($e) {
+ $this->MatchChar('~');
+ }
+
+
+ $matched = $this->MatchQuoted($char, $j+1);
+ if( $matched === false ){
+ return;
+ }
+
+ $quoted = $char.$matched.$char;
+ return $this->NewObj5('Less_Tree_Quoted',array($quoted, $matched, $e, $index, $this->env->currentFileInfo) );
+ }
+
+
+ /**
+ * When PCRE JIT is enabled in php, regular expressions don't work for matching quoted strings
+ *
+ * $regex = '/\\G\'((?:[^\'\\\\\r\n]|\\\\.|\\\\\r\n|\\\\[\n\r\f])*)\'/';
+ * $regex = '/\\G"((?:[^"\\\\\r\n]|\\\\.|\\\\\r\n|\\\\[\n\r\f])*)"/';
+ *
+ */
+ private function MatchQuoted($quote_char, $i){
+
+ $matched = '';
+ while( $i < $this->input_len ){
+ $c = $this->input[$i];
+
+ //escaped character
+ if( $c === '\\' ){
+ $matched .= $c . $this->input[$i+1];
+ $i += 2;
+ continue;
+ }
+
+ if( $c === $quote_char ){
+ $this->pos = $i+1;
+ $this->skipWhitespace(0);
+ return $matched;
+ }
+
+ if( $c === "\r" || $c === "\n" ){
+ return false;
+ }
+
+ $i++;
+ $matched .= $c;
+ }
+
+ return false;
+ }
+
+
+ //
+ // A catch-all word, such as:
+ //
+ // black border-collapse
+ //
+ private function parseEntitiesKeyword(){
+
+ //$k = $this->MatchReg('/\\G[_A-Za-z-][_A-Za-z0-9-]*/');
+ $k = $this->MatchReg('/\\G%|\\G[_A-Za-z-][_A-Za-z0-9-]*/');
+ if( $k ){
+ $k = $k[0];
+ $color = $this->fromKeyword($k);
+ if( $color ){
+ return $color;
+ }
+ return $this->NewObj1('Less_Tree_Keyword',$k);
+ }
+ }
+
+ // duplicate of Less_Tree_Color::FromKeyword
+ private function FromKeyword( $keyword ){
+ $keyword = strtolower($keyword);
+
+ if( Less_Colors::hasOwnProperty($keyword) ){
+ // detect named color
+ return $this->NewObj1('Less_Tree_Color',substr(Less_Colors::color($keyword), 1));
+ }
+
+ if( $keyword === 'transparent' ){
+ return $this->NewObj3('Less_Tree_Color', array( array(0, 0, 0), 0, true));
+ }
+ }
+
+ //
+ // A function call
+ //
+ // rgb(255, 0, 255)
+ //
+ // We also try to catch IE's `alpha()`, but let the `alpha` parser
+ // deal with the details.
+ //
+ // The arguments are parsed with the `entities.arguments` parser.
+ //
+ private function parseEntitiesCall(){
+ $index = $this->pos;
+
+ if( !preg_match('/\\G([\w-]+|%|progid:[\w\.]+)\(/', $this->input, $name,0,$this->pos) ){
+ return;
+ }
+ $name = $name[1];
+ $nameLC = strtolower($name);
+
+ if ($nameLC === 'url') {
+ return null;
+ }
+
+ $this->pos += strlen($name);
+
+ if( $nameLC === 'alpha' ){
+ $alpha_ret = $this->parseAlpha();
+ if( $alpha_ret ){
+ return $alpha_ret;
+ }
+ }
+
+ $this->MatchChar('('); // Parse the '(' and consume whitespace.
+
+ $args = $this->parseEntitiesArguments();
+
+ if( !$this->MatchChar(')') ){
+ return;
+ }
+
+ if ($name) {
+ return $this->NewObj4('Less_Tree_Call',array($name, $args, $index, $this->env->currentFileInfo) );
+ }
+ }
+
+ /**
+ * Parse a list of arguments
+ *
+ * @return array
+ */
+ private function parseEntitiesArguments(){
+
+ $args = array();
+ while( true ){
+ $arg = $this->MatchFuncs( array('parseEntitiesAssignment','parseExpression') );
+ if( !$arg ){
+ break;
+ }
+
+ $args[] = $arg;
+ if( !$this->MatchChar(',') ){
+ break;
+ }
+ }
+ return $args;
+ }
+
+ private function parseEntitiesLiteral(){
+ return $this->MatchFuncs( array('parseEntitiesDimension','parseEntitiesColor','parseEntitiesQuoted','parseUnicodeDescriptor') );
+ }
+
+ // Assignments are argument entities for calls.
+ // They are present in ie filter properties as shown below.
+ //
+ // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )
+ //
+ private function parseEntitiesAssignment() {
+
+ $key = $this->MatchReg('/\\G\w+(?=\s?=)/');
+ if( !$key ){
+ return;
+ }
+
+ if( !$this->MatchChar('=') ){
+ return;
+ }
+
+ $value = $this->parseEntity();
+ if( $value ){
+ return $this->NewObj2('Less_Tree_Assignment',array($key[0], $value));
+ }
+ }
+
+ //
+ // Parse url() tokens
+ //
+ // We use a specific rule for urls, because they don't really behave like
+ // standard function calls. The difference is that the argument doesn't have
+ // to be enclosed within a string, so it can't be parsed as an Expression.
+ //
+ private function parseEntitiesUrl(){
+
+
+ if( $this->input[$this->pos] !== 'u' || !$this->matchReg('/\\Gurl\(/') ){
+ return;
+ }
+
+ $value = $this->match( array('parseEntitiesQuoted','parseEntitiesVariable','/\\Gdata\:.*?[^\)]+/','/\\G(?:(?:\\\\[\(\)\'"])|[^\(\)\'"])+/') );
+ if( !$value ){
+ $value = '';
+ }
+
+
+ $this->expectChar(')');
+
+
+ if( isset($value->value) || $value instanceof Less_Tree_Variable ){
+ return $this->NewObj2('Less_Tree_Url',array($value, $this->env->currentFileInfo));
+ }
+
+ return $this->NewObj2('Less_Tree_Url', array( $this->NewObj1('Less_Tree_Anonymous',$value), $this->env->currentFileInfo) );
+ }
+
+
+ //
+ // A Variable entity, such as `@fink`, in
+ //
+ // width: @fink + 2px
+ //
+ // We use a different parser for variable definitions,
+ // see `parsers.variable`.
+ //
+ private function parseEntitiesVariable(){
+ $index = $this->pos;
+ if ($this->PeekChar('@') && ($name = $this->MatchReg('/\\G@@?[\w-]+/'))) {
+ return $this->NewObj3('Less_Tree_Variable', array( $name[0], $index, $this->env->currentFileInfo));
+ }
+ }
+
+
+ // A variable entity using the protective {} e.g. @{var}
+ private function parseEntitiesVariableCurly() {
+ $index = $this->pos;
+
+ if( $this->input_len > ($this->pos+1) && $this->input[$this->pos] === '@' && ($curly = $this->MatchReg('/\\G@\{([\w-]+)\}/')) ){
+ return $this->NewObj3('Less_Tree_Variable',array('@'.$curly[1], $index, $this->env->currentFileInfo));
+ }
+ }
+
+ //
+ // A Hexadecimal color
+ //
+ // #4F3C2F
+ //
+ // `rgb` and `hsl` colors are parsed through the `entities.call` parser.
+ //
+ private function parseEntitiesColor(){
+ if ($this->PeekChar('#') && ($rgb = $this->MatchReg('/\\G#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/'))) {
+ return $this->NewObj1('Less_Tree_Color',$rgb[1]);
+ }
+ }
+
+ //
+ // A Dimension, that is, a number and a unit
+ //
+ // 0.5em 95%
+ //
+ private function parseEntitiesDimension(){
+
+ $c = @ord($this->input[$this->pos]);
+
+ //Is the first char of the dimension 0-9, '.', '+' or '-'
+ if (($c > 57 || $c < 43) || $c === 47 || $c == 44){
+ return;
+ }
+
+ $value = $this->MatchReg('/\\G([+-]?\d*\.?\d+)(%|[a-z]+)?/');
+ if( $value ){
+
+ if( isset($value[2]) ){
+ return $this->NewObj2('Less_Tree_Dimension', array($value[1],$value[2]));
+ }
+ return $this->NewObj1('Less_Tree_Dimension',$value[1]);
+ }
+ }
+
+
+ //
+ // A unicode descriptor, as is used in unicode-range
+ //
+ // U+0?? or U+00A1-00A9
+ //
+ function parseUnicodeDescriptor() {
+ $ud = $this->MatchReg('/\\G(U\+[0-9a-fA-F?]+)(\-[0-9a-fA-F?]+)?/');
+ if( $ud ){
+ return $this->NewObj1('Less_Tree_UnicodeDescriptor', $ud[0]);
+ }
+ }
+
+
+ //
+ // JavaScript code to be evaluated
+ //
+ // `window.location.href`
+ //
+ private function parseEntitiesJavascript(){
+ $e = false;
+ $j = $this->pos;
+ if( $this->input[$j] === '~' ){
+ $j++;
+ $e = true;
+ }
+ if( $this->input[$j] !== '`' ){
+ return;
+ }
+ if( $e ){
+ $this->MatchChar('~');
+ }
+ $str = $this->MatchReg('/\\G`([^`]*)`/');
+ if( $str ){
+ return $this->NewObj3('Less_Tree_Javascript', array($str[1], $this->pos, $e));
+ }
+ }
+
+
+ //
+ // The variable part of a variable definition. Used in the `rule` parser
+ //
+ // @fink:
+ //
+ private function parseVariable(){
+ if ($this->PeekChar('@') && ($name = $this->MatchReg('/\\G(@[\w-]+)\s*:/'))) {
+ return $name[1];
+ }
+ }
+
+
+ //
+ // The variable part of a variable definition. Used in the `rule` parser
+ //
+ // @fink();
+ //
+ private function parseRulesetCall(){
+
+ if( $this->input[$this->pos] === '@' && ($name = $this->MatchReg('/\\G(@[\w-]+)\s*\(\s*\)\s*;/')) ){
+ return $this->NewObj1('Less_Tree_RulesetCall', $name[1] );
+ }
+ }
+
+
+ //
+ // extend syntax - used to extend selectors
+ //
+ function parseExtend($isRule = false){
+
+ $index = $this->pos;
+ $extendList = array();
+
+
+ if( !$this->MatchReg( $isRule ? '/\\G&:extend\(/' : '/\\G:extend\(/' ) ){ return; }
+
+ do{
+ $option = null;
+ $elements = array();
+ while( true ){
+ $option = $this->MatchReg('/\\G(all)(?=\s*(\)|,))/');
+ if( $option ){ break; }
+ $e = $this->parseElement();
+ if( !$e ){ break; }
+ $elements[] = $e;
+ }
+
+ if( $option ){
+ $option = $option[1];
+ }
+
+ $extendList[] = $this->NewObj3('Less_Tree_Extend', array( $this->NewObj1('Less_Tree_Selector',$elements), $option, $index ));
+
+ }while( $this->MatchChar(",") );
+
+ $this->expect('/\\G\)/');
+
+ if( $isRule ){
+ $this->expect('/\\G;/');
+ }
+
+ return $extendList;
+ }
+
+
+ //
+ // A Mixin call, with an optional argument list
+ //
+ // #mixins > .square(#fff);
+ // .rounded(4px, black);
+ // .button;
+ //
+ // The `while` loop is there because mixins can be
+ // namespaced, but we only support the child and descendant
+ // selector for now.
+ //
+ private function parseMixinCall(){
+
+ $char = $this->input[$this->pos];
+ if( $char !== '.' && $char !== '#' ){
+ return;
+ }
+
+ $index = $this->pos;
+ $this->save(); // stop us absorbing part of an invalid selector
+
+ $elements = $this->parseMixinCallElements();
+
+ if( $elements ){
+
+ if( $this->MatchChar('(') ){
+ $returned = $this->parseMixinArgs(true);
+ $args = $returned['args'];
+ $this->expectChar(')');
+ }else{
+ $args = array();
+ }
+
+ $important = $this->parseImportant();
+
+ if( $this->parseEnd() ){
+ $this->forget();
+ return $this->NewObj5('Less_Tree_Mixin_Call', array( $elements, $args, $index, $this->env->currentFileInfo, $important));
+ }
+ }
+
+ $this->restore();
+ }
+
+
+ private function parseMixinCallElements(){
+ $elements = array();
+ $c = null;
+
+ while( true ){
+ $elemIndex = $this->pos;
+ $e = $this->MatchReg('/\\G[#.](?:[\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/');
+ if( !$e ){
+ break;
+ }
+ $elements[] = $this->NewObj4('Less_Tree_Element', array($c, $e[0], $elemIndex, $this->env->currentFileInfo));
+ $c = $this->MatchChar('>');
+ }
+
+ return $elements;
+ }
+
+
+
+ /**
+ * @param boolean $isCall
+ */
+ private function parseMixinArgs( $isCall ){
+ $expressions = array();
+ $argsSemiColon = array();
+ $isSemiColonSeperated = null;
+ $argsComma = array();
+ $expressionContainsNamed = null;
+ $name = null;
+ $returner = array('args'=>array(), 'variadic'=> false);
+
+ $this->save();
+
+ while( true ){
+ if( $isCall ){
+ $arg = $this->MatchFuncs( array( 'parseDetachedRuleset','parseExpression' ) );
+ } else {
+ $this->parseComments();
+ if( $this->input[ $this->pos ] === '.' && $this->MatchReg('/\\G\.{3}/') ){
+ $returner['variadic'] = true;
+ if( $this->MatchChar(";") && !$isSemiColonSeperated ){
+ $isSemiColonSeperated = true;
+ }
+
+ if( $isSemiColonSeperated ){
+ $argsSemiColon[] = array('variadic'=>true);
+ }else{
+ $argsComma[] = array('variadic'=>true);
+ }
+ break;
+ }
+ $arg = $this->MatchFuncs( array('parseEntitiesVariable','parseEntitiesLiteral','parseEntitiesKeyword') );
+ }
+
+ if( !$arg ){
+ break;
+ }
+
+
+ $nameLoop = null;
+ if( $arg instanceof Less_Tree_Expression ){
+ $arg->throwAwayComments();
+ }
+ $value = $arg;
+ $val = null;
+
+ if( $isCall ){
+ // Variable
+ if( property_exists($arg,'value') && count($arg->value) == 1 ){
+ $val = $arg->value[0];
+ }
+ } else {
+ $val = $arg;
+ }
+
+
+ if( $val instanceof Less_Tree_Variable ){
+
+ if( $this->MatchChar(':') ){
+ if( $expressions ){
+ if( $isSemiColonSeperated ){
+ $this->Error('Cannot mix ; and , as delimiter types');
+ }
+ $expressionContainsNamed = true;
+ }
+
+ // we do not support setting a ruleset as a default variable - it doesn't make sense
+ // However if we do want to add it, there is nothing blocking it, just don't error
+ // and remove isCall dependency below
+ $value = null;
+ if( $isCall ){
+ $value = $this->parseDetachedRuleset();
+ }
+ if( !$value ){
+ $value = $this->parseExpression();
+ }
+
+ if( !$value ){
+ if( $isCall ){
+ $this->Error('could not understand value for named argument');
+ } else {
+ $this->restore();
+ $returner['args'] = array();
+ return $returner;
+ }
+ }
+
+ $nameLoop = ($name = $val->name);
+ }elseif( !$isCall && $this->MatchReg('/\\G\.{3}/') ){
+ $returner['variadic'] = true;
+ if( $this->MatchChar(";") && !$isSemiColonSeperated ){
+ $isSemiColonSeperated = true;
+ }
+ if( $isSemiColonSeperated ){
+ $argsSemiColon[] = array('name'=> $arg->name, 'variadic' => true);
+ }else{
+ $argsComma[] = array('name'=> $arg->name, 'variadic' => true);
+ }
+ break;
+ }elseif( !$isCall ){
+ $name = $nameLoop = $val->name;
+ $value = null;
+ }
+ }
+
+ if( $value ){
+ $expressions[] = $value;
+ }
+
+ $argsComma[] = array('name'=>$nameLoop, 'value'=>$value );
+
+ if( $this->MatchChar(',') ){
+ continue;
+ }
+
+ if( $this->MatchChar(';') || $isSemiColonSeperated ){
+
+ if( $expressionContainsNamed ){
+ $this->Error('Cannot mix ; and , as delimiter types');
+ }
+
+ $isSemiColonSeperated = true;
+
+ if( count($expressions) > 1 ){
+ $value = $this->NewObj1('Less_Tree_Value', $expressions);
+ }
+ $argsSemiColon[] = array('name'=>$name, 'value'=>$value );
+
+ $name = null;
+ $expressions = array();
+ $expressionContainsNamed = false;
+ }
+ }
+
+ $this->forget();
+ $returner['args'] = ($isSemiColonSeperated ? $argsSemiColon : $argsComma);
+ return $returner;
+ }
+
+
+
+ //
+ // A Mixin definition, with a list of parameters
+ //
+ // .rounded (@radius: 2px, @color) {
+ // ...
+ // }
+ //
+ // Until we have a finer grained state-machine, we have to
+ // do a look-ahead, to make sure we don't have a mixin call.
+ // See the `rule` function for more information.
+ //
+ // We start by matching `.rounded (`, and then proceed on to
+ // the argument list, which has optional default values.
+ // We store the parameters in `params`, with a `value` key,
+ // if there is a value, such as in the case of `@radius`.
+ //
+ // Once we've got our params list, and a closing `)`, we parse
+ // the `{...}` block.
+ //
+ private function parseMixinDefinition(){
+ $cond = null;
+
+ $char = $this->input[$this->pos];
+ if( ($char !== '.' && $char !== '#') || ($char === '{' && $this->PeekReg('/\\G[^{]*\}/')) ){
+ return;
+ }
+
+ $this->save();
+
+ $match = $this->MatchReg('/\\G([#.](?:[\w-]|\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/');
+ if( $match ){
+ $name = $match[1];
+
+ $argInfo = $this->parseMixinArgs( false );
+ $params = $argInfo['args'];
+ $variadic = $argInfo['variadic'];
+
+
+ // .mixincall("@{a}");
+ // looks a bit like a mixin definition..
+ // also
+ // .mixincall(@a: {rule: set;});
+ // so we have to be nice and restore
+ if( !$this->MatchChar(')') ){
+ $this->furthest = $this->pos;
+ $this->restore();
+ return;
+ }
+
+
+ $this->parseComments();
+
+ if ($this->MatchReg('/\\Gwhen/')) { // Guard
+ $cond = $this->expect('parseConditions', 'Expected conditions');
+ }
+
+ $ruleset = $this->parseBlock();
+
+ if( is_array($ruleset) ){
+ $this->forget();
+ return $this->NewObj5('Less_Tree_Mixin_Definition', array( $name, $params, $ruleset, $cond, $variadic));
+ }
+
+ $this->restore();
+ }else{
+ $this->forget();
+ }
+ }
+
+ //
+ // Entities are the smallest recognized token,
+ // and can be found inside a rule's value.
+ //
+ private function parseEntity(){
+
+ return $this->MatchFuncs( array('parseEntitiesLiteral','parseEntitiesVariable','parseEntitiesUrl','parseEntitiesCall','parseEntitiesKeyword','parseEntitiesJavascript','parseComment') );
+ }
+
+ //
+ // A Rule terminator. Note that we use `peek()` to check for '}',
+ // because the `block` rule will be expecting it, but we still need to make sure
+ // it's there, if ';' was omitted.
+ //
+ private function parseEnd(){
+ return $this->MatchChar(';') || $this->PeekChar('}');
+ }
+
+ //
+ // IE's alpha function
+ //
+ // alpha(opacity=88)
+ //
+ private function parseAlpha(){
+
+ if ( ! $this->MatchReg('/\\G\(opacity=/i')) {
+ return;
+ }
+
+ $value = $this->MatchReg('/\\G[0-9]+/');
+ if( $value ){
+ $value = $value[0];
+ }else{
+ $value = $this->parseEntitiesVariable();
+ if( !$value ){
+ return;
+ }
+ }
+
+ $this->expectChar(')');
+ return $this->NewObj1('Less_Tree_Alpha',$value);
+ }
+
+
+ //
+ // A Selector Element
+ //
+ // div
+ // + h1
+ // #socks
+ // input[type="text"]
+ //
+ // Elements are the building blocks for Selectors,
+ // they are made out of a `Combinator` (see combinator rule),
+ // and an element name, such as a tag a class, or `*`.
+ //
+ private function parseElement(){
+ $c = $this->parseCombinator();
+ $index = $this->pos;
+
+ $e = $this->match( array('/\\G(?:\d+\.\d+|\d+)%/', '/\\G(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/',
+ '#*', '#&', 'parseAttribute', '/\\G\([^()@]+\)/', '/\\G[\.#](?=@)/', 'parseEntitiesVariableCurly') );
+
+ if( is_null($e) ){
+ $this->save();
+ if( $this->MatchChar('(') ){
+ if( ($v = $this->parseSelector()) && $this->MatchChar(')') ){
+ $e = $this->NewObj1('Less_Tree_Paren',$v);
+ $this->forget();
+ }else{
+ $this->restore();
+ }
+ }else{
+ $this->forget();
+ }
+ }
+
+ if( !is_null($e) ){
+ return $this->NewObj4('Less_Tree_Element',array( $c, $e, $index, $this->env->currentFileInfo));
+ }
+ }
+
+ //
+ // Combinators combine elements together, in a Selector.
+ //
+ // Because our parser isn't white-space sensitive, special care
+ // has to be taken, when parsing the descendant combinator, ` `,
+ // as it's an empty space. We have to check the previous character
+ // in the input, to see if it's a ` ` character.
+ //
+ private function parseCombinator(){
+ if( $this->pos < $this->input_len ){
+ $c = $this->input[$this->pos];
+ if ($c === '>' || $c === '+' || $c === '~' || $c === '|' || $c === '^' ){
+
+ $this->pos++;
+ if( $this->input[$this->pos] === '^' ){
+ $c = '^^';
+ $this->pos++;
+ }
+
+ $this->skipWhitespace(0);
+
+ return $c;
+ }
+
+ if( $this->pos > 0 && $this->isWhitespace(-1) ){
+ return ' ';
+ }
+ }
+ }
+
+ //
+ // A CSS selector (see selector below)
+ // with less extensions e.g. the ability to extend and guard
+ //
+ private function parseLessSelector(){
+ return $this->parseSelector(true);
+ }
+
+ //
+ // A CSS Selector
+ //
+ // .class > div + h1
+ // li a:hover
+ //
+ // Selectors are made out of one or more Elements, see above.
+ //
+ private function parseSelector( $isLess = false ){
+ $elements = array();
+ $extendList = array();
+ $condition = null;
+ $when = false;
+ $extend = false;
+ $e = null;
+ $c = null;
+ $index = $this->pos;
+
+ while( ($isLess && ($extend = $this->parseExtend())) || ($isLess && ($when = $this->MatchReg('/\\Gwhen/') )) || ($e = $this->parseElement()) ){
+ if( $when ){
+ $condition = $this->expect('parseConditions', 'expected condition');
+ }elseif( $condition ){
+ //error("CSS guard can only be used at the end of selector");
+ }elseif( $extend ){
+ $extendList = array_merge($extendList,$extend);
+ }else{
+ //if( count($extendList) ){
+ //error("Extend can only be used at the end of selector");
+ //}
+ if( $this->pos < $this->input_len ){
+ $c = $this->input[ $this->pos ];
+ }
+ $elements[] = $e;
+ $e = null;
+ }
+
+ if( $c === '{' || $c === '}' || $c === ';' || $c === ',' || $c === ')') { break; }
+ }
+
+ if( $elements ){
+ return $this->NewObj5('Less_Tree_Selector',array($elements, $extendList, $condition, $index, $this->env->currentFileInfo));
+ }
+ if( $extendList ) {
+ $this->Error('Extend must be used to extend a selector, it cannot be used on its own');
+ }
+ }
+
+ private function parseTag(){
+ return ( $tag = $this->MatchReg('/\\G[A-Za-z][A-Za-z-]*[0-9]?/') ) ? $tag : $this->MatchChar('*');
+ }
+
+ private function parseAttribute(){
+
+ $val = null;
+
+ if( !$this->MatchChar('[') ){
+ return;
+ }
+
+ $key = $this->parseEntitiesVariableCurly();
+ if( !$key ){
+ $key = $this->expect('/\\G(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\\\.)+/');
+ }
+
+ $op = $this->MatchReg('/\\G[|~*$^]?=/');
+ if( $op ){
+ $val = $this->match( array('parseEntitiesQuoted','/\\G[0-9]+%/','/\\G[\w-]+/','parseEntitiesVariableCurly') );
+ }
+
+ $this->expectChar(']');
+
+ return $this->NewObj3('Less_Tree_Attribute',array( $key, $op[0], $val));
+ }
+
+ //
+ // The `block` rule is used by `ruleset` and `mixin.definition`.
+ // It's a wrapper around the `primary` rule, with added `{}`.
+ //
+ private function parseBlock(){
+ if( $this->MatchChar('{') ){
+ $content = $this->parsePrimary();
+ if( $this->MatchChar('}') ){
+ return $content;
+ }
+ }
+ }
+
+ private function parseBlockRuleset(){
+ $block = $this->parseBlock();
+
+ if( $block ){
+ $block = $this->NewObj2('Less_Tree_Ruleset',array( null, $block));
+ }
+
+ return $block;
+ }
+
+ private function parseDetachedRuleset(){
+ $blockRuleset = $this->parseBlockRuleset();
+ if( $blockRuleset ){
+ return $this->NewObj1('Less_Tree_DetachedRuleset',$blockRuleset);
+ }
+ }
+
+ //
+ // div, .class, body > p {...}
+ //
+ private function parseRuleset(){
+ $selectors = array();
+
+ $this->save();
+
+ while( true ){
+ $s = $this->parseLessSelector();
+ if( !$s ){
+ break;
+ }
+ $selectors[] = $s;
+ $this->parseComments();
+
+ if( $s->condition && count($selectors) > 1 ){
+ $this->Error('Guards are only currently allowed on a single selector.');
+ }
+
+ if( !$this->MatchChar(',') ){
+ break;
+ }
+ if( $s->condition ){
+ $this->Error('Guards are only currently allowed on a single selector.');
+ }
+ $this->parseComments();
+ }
+
+
+ if( $selectors ){
+ $rules = $this->parseBlock();
+ if( is_array($rules) ){
+ $this->forget();
+ return $this->NewObj2('Less_Tree_Ruleset',array( $selectors, $rules)); //Less_Environment::$strictImports
+ }
+ }
+
+ // Backtrack
+ $this->furthest = $this->pos;
+ $this->restore();
+ }
+
+ /**
+ * Custom less.php parse function for finding simple name-value css pairs
+ * ex: width:100px;
+ *
+ */
+ private function parseNameValue(){
+
+ $index = $this->pos;
+ $this->save();
+
+
+ //$match = $this->MatchReg('/\\G([a-zA-Z\-]+)\s*:\s*((?:\'")?[a-zA-Z0-9\-% \.,!]+?(?:\'")?)\s*([;}])/');
+ $match = $this->MatchReg('/\\G([a-zA-Z\-]+)\s*:\s*([\'"]?[#a-zA-Z0-9\-%\.,]+?[\'"]?) *(! *important)?\s*([;}])/');
+ if( $match ){
+
+ if( $match[4] == '}' ){
+ $this->pos = $index + strlen($match[0])-1;
+ }
+
+ if( $match[3] ){
+ $match[2] .= ' !important';
+ }
+
+ return $this->NewObj4('Less_Tree_NameValue',array( $match[1], $match[2], $index, $this->env->currentFileInfo));
+ }
+
+ $this->restore();
+ }
+
+
+ private function parseRule( $tryAnonymous = null ){
+
+ $merge = false;
+ $startOfRule = $this->pos;
+
+ $c = $this->input[$this->pos];
+ if( $c === '.' || $c === '#' || $c === '&' ){
+ return;
+ }
+
+ $this->save();
+ $name = $this->MatchFuncs( array('parseVariable','parseRuleProperty'));
+
+ if( $name ){
+
+ $isVariable = is_string($name);
+
+ $value = null;
+ if( $isVariable ){
+ $value = $this->parseDetachedRuleset();
+ }
+
+ $important = null;
+ if( !$value ){
+
+ // prefer to try to parse first if its a variable or we are compressing
+ // but always fallback on the other one
+ //if( !$tryAnonymous && is_string($name) && $name[0] === '@' ){
+ if( !$tryAnonymous && (Less_Parser::$options['compress'] || $isVariable) ){
+ $value = $this->MatchFuncs( array('parseValue','parseAnonymousValue'));
+ }else{
+ $value = $this->MatchFuncs( array('parseAnonymousValue','parseValue'));
+ }
+
+ $important = $this->parseImportant();
+
+ // a name returned by this.ruleProperty() is always an array of the form:
+ // [string-1, ..., string-n, ""] or [string-1, ..., string-n, "+"]
+ // where each item is a tree.Keyword or tree.Variable
+ if( !$isVariable && is_array($name) ){
+ $nm = array_pop($name);
+ if( $nm->value ){
+ $merge = $nm->value;
+ }
+ }
+ }
+
+
+ if( $value && $this->parseEnd() ){
+ $this->forget();
+ return $this->NewObj6('Less_Tree_Rule',array( $name, $value, $important, $merge, $startOfRule, $this->env->currentFileInfo));
+ }else{
+ $this->furthest = $this->pos;
+ $this->restore();
+ if( $value && !$tryAnonymous ){
+ return $this->parseRule(true);
+ }
+ }
+ }else{
+ $this->forget();
+ }
+ }
+
+ function parseAnonymousValue(){
+
+ if( preg_match('/\\G([^@+\/\'"*`(;{}-]*);/',$this->input, $match, 0, $this->pos) ){
+ $this->pos += strlen($match[1]);
+ return $this->NewObj1('Less_Tree_Anonymous',$match[1]);
+ }
+ }
+
+ //
+ // An @import directive
+ //
+ // @import "lib";
+ //
+ // Depending on our environment, importing is done differently:
+ // In the browser, it's an XHR request, in Node, it would be a
+ // file-system operation. The function used for importing is
+ // stored in `import`, which we pass to the Import constructor.
+ //
+ private function parseImport(){
+
+ $this->save();
+
+ $dir = $this->MatchReg('/\\G@import?\s+/');
+
+ if( $dir ){
+ $options = $this->parseImportOptions();
+ $path = $this->MatchFuncs( array('parseEntitiesQuoted','parseEntitiesUrl'));
+
+ if( $path ){
+ $features = $this->parseMediaFeatures();
+ if( $this->MatchChar(';') ){
+ if( $features ){
+ $features = $this->NewObj1('Less_Tree_Value',$features);
+ }
+
+ $this->forget();
+ return $this->NewObj5('Less_Tree_Import',array( $path, $features, $options, $this->pos, $this->env->currentFileInfo));
+ }
+ }
+ }
+
+ $this->restore();
+ }
+
+ private function parseImportOptions(){
+
+ $options = array();
+
+ // list of options, surrounded by parens
+ if( !$this->MatchChar('(') ){
+ return $options;
+ }
+ do{
+ $optionName = $this->parseImportOption();
+ if( $optionName ){
+ $value = true;
+ switch( $optionName ){
+ case "css":
+ $optionName = "less";
+ $value = false;
+ break;
+ case "once":
+ $optionName = "multiple";
+ $value = false;
+ break;
+ }
+ $options[$optionName] = $value;
+ if( !$this->MatchChar(',') ){ break; }
+ }
+ }while( $optionName );
+ $this->expectChar(')');
+ return $options;
+ }
+
+ private function parseImportOption(){
+ $opt = $this->MatchReg('/\\G(less|css|multiple|once|inline|reference|optional)/');
+ if( $opt ){
+ return $opt[1];
+ }
+ }
+
+ private function parseMediaFeature() {
+ $nodes = array();
+
+ do{
+ $e = $this->MatchFuncs(array('parseEntitiesKeyword','parseEntitiesVariable'));
+ if( $e ){
+ $nodes[] = $e;
+ } elseif ($this->MatchChar('(')) {
+ $p = $this->parseProperty();
+ $e = $this->parseValue();
+ if ($this->MatchChar(')')) {
+ if ($p && $e) {
+ $r = $this->NewObj7('Less_Tree_Rule', array( $p, $e, null, null, $this->pos, $this->env->currentFileInfo, true));
+ $nodes[] = $this->NewObj1('Less_Tree_Paren',$r);
+ } elseif ($e) {
+ $nodes[] = $this->NewObj1('Less_Tree_Paren',$e);
+ } else {
+ return null;
+ }
+ } else
+ return null;
+ }
+ } while ($e);
+
+ if ($nodes) {
+ return $this->NewObj1('Less_Tree_Expression',$nodes);
+ }
+ }
+
+ private function parseMediaFeatures() {
+ $features = array();
+
+ do{
+ $e = $this->parseMediaFeature();
+ if( $e ){
+ $features[] = $e;
+ if (!$this->MatchChar(',')) break;
+ }else{
+ $e = $this->parseEntitiesVariable();
+ if( $e ){
+ $features[] = $e;
+ if (!$this->MatchChar(',')) break;
+ }
+ }
+ } while ($e);
+
+ return $features ? $features : null;
+ }
+
+ private function parseMedia() {
+ if( $this->MatchReg('/\\G@media/') ){
+ $features = $this->parseMediaFeatures();
+ $rules = $this->parseBlock();
+
+ if( is_array($rules) ){
+ return $this->NewObj4('Less_Tree_Media',array( $rules, $features, $this->pos, $this->env->currentFileInfo));
+ }
+ }
+ }
+
+
+ //
+ // A CSS Directive
+ //
+ // @charset "utf-8";
+ //
+ private function parseDirective(){
+
+ if( !$this->PeekChar('@') ){
+ return;
+ }
+
+ $rules = null;
+ $index = $this->pos;
+ $hasBlock = true;
+ $hasIdentifier = false;
+ $hasExpression = false;
+ $hasUnknown = false;
+
+
+ $value = $this->MatchFuncs(array('parseImport','parseMedia'));
+ if( $value ){
+ return $value;
+ }
+
+ $this->save();
+
+ $name = $this->MatchReg('/\\G@[a-z-]+/');
+
+ if( !$name ) return;
+ $name = $name[0];
+
+
+ $nonVendorSpecificName = $name;
+ $pos = strpos($name,'-', 2);
+ if( $name[1] == '-' && $pos > 0 ){
+ $nonVendorSpecificName = "@" . substr($name, $pos + 1);
+ }
+
+
+ switch( $nonVendorSpecificName ){
+ /*
+ case "@font-face":
+ case "@viewport":
+ case "@top-left":
+ case "@top-left-corner":
+ case "@top-center":
+ case "@top-right":
+ case "@top-right-corner":
+ case "@bottom-left":
+ case "@bottom-left-corner":
+ case "@bottom-center":
+ case "@bottom-right":
+ case "@bottom-right-corner":
+ case "@left-top":
+ case "@left-middle":
+ case "@left-bottom":
+ case "@right-top":
+ case "@right-middle":
+ case "@right-bottom":
+ hasBlock = true;
+ break;
+ */
+ case "@charset":
+ $hasIdentifier = true;
+ $hasBlock = false;
+ break;
+ case "@namespace":
+ $hasExpression = true;
+ $hasBlock = false;
+ break;
+ case "@keyframes":
+ $hasIdentifier = true;
+ break;
+ case "@host":
+ case "@page":
+ case "@document":
+ case "@supports":
+ $hasUnknown = true;
+ break;
+ }
+
+ if( $hasIdentifier ){
+ $value = $this->parseEntity();
+ if( !$value ){
+ $this->error("expected " . $name . " identifier");
+ }
+ } else if( $hasExpression ){
+ $value = $this->parseExpression();
+ if( !$value ){
+ $this->error("expected " . $name. " expression");
+ }
+ } else if ($hasUnknown) {
+
+ $value = $this->MatchReg('/\\G[^{;]+/');
+ if( $value ){
+ $value = $this->NewObj1('Less_Tree_Anonymous',trim($value[0]));
+ }
+ }
+
+ if( $hasBlock ){
+ $rules = $this->parseBlockRuleset();
+ }
+
+ if( $rules || (!$hasBlock && $value && $this->MatchChar(';'))) {
+ $this->forget();
+ return $this->NewObj5('Less_Tree_Directive',array($name, $value, $rules, $index, $this->env->currentFileInfo));
+ }
+
+ $this->restore();
+ }
+
+
+ //
+ // A Value is a comma-delimited list of Expressions
+ //
+ // font-family: Baskerville, Georgia, serif;
+ //
+ // In a Rule, a Value represents everything after the `:`,
+ // and before the `;`.
+ //
+ private function parseValue(){
+ $expressions = array();
+
+ do{
+ $e = $this->parseExpression();
+ if( $e ){
+ $expressions[] = $e;
+ if (! $this->MatchChar(',')) {
+ break;
+ }
+ }
+ }while($e);
+
+ if( $expressions ){
+ return $this->NewObj1('Less_Tree_Value',$expressions);
+ }
+ }
+
+ private function parseImportant (){
+ if( $this->PeekChar('!') && $this->MatchReg('/\\G! *important/') ){
+ return ' !important';
+ }
+ }
+
+ private function parseSub (){
+
+ if( $this->MatchChar('(') ){
+ $a = $this->parseAddition();
+ if( $a ){
+ $this->expectChar(')');
+ return $this->NewObj2('Less_Tree_Expression',array( array($a), true) ); //instead of $e->parens = true so the value is cached
+ }
+ }
+ }
+
+
+ /**
+ * Parses multiplication operation
+ *
+ * @return Less_Tree_Operation|null
+ */
+ function parseMultiplication(){
+
+ $return = $m = $this->parseOperand();
+ if( $return ){
+ while( true ){
+
+ $isSpaced = $this->isWhitespace( -1 );
+
+ if( $this->PeekReg('/\\G\/[*\/]/') ){
+ break;
+ }
+
+ $op = $this->MatchChar('/');
+ if( !$op ){
+ $op = $this->MatchChar('*');
+ if( !$op ){
+ break;
+ }
+ }
+
+ $a = $this->parseOperand();
+
+ if(!$a) { break; }
+
+ $m->parensInOp = true;
+ $a->parensInOp = true;
+ $return = $this->NewObj3('Less_Tree_Operation',array( $op, array( $return, $a ), $isSpaced) );
+ }
+ }
+ return $return;
+
+ }
+
+
+ /**
+ * Parses an addition operation
+ *
+ * @return Less_Tree_Operation|null
+ */
+ private function parseAddition (){
+
+ $return = $m = $this->parseMultiplication();
+ if( $return ){
+ while( true ){
+
+ $isSpaced = $this->isWhitespace( -1 );
+
+ $op = $this->MatchReg('/\\G[-+]\s+/');
+ if( $op ){
+ $op = $op[0];
+ }else{
+ if( !$isSpaced ){
+ $op = $this->match(array('#+','#-'));
+ }
+ if( !$op ){
+ break;
+ }
+ }
+
+ $a = $this->parseMultiplication();
+ if( !$a ){
+ break;
+ }
+
+ $m->parensInOp = true;
+ $a->parensInOp = true;
+ $return = $this->NewObj3('Less_Tree_Operation',array($op, array($return, $a), $isSpaced));
+ }
+ }
+
+ return $return;
+ }
+
+
+ /**
+ * Parses the conditions
+ *
+ * @return Less_Tree_Condition|null
+ */
+ private function parseConditions() {
+ $index = $this->pos;
+ $return = $a = $this->parseCondition();
+ if( $a ){
+ while( true ){
+ if( !$this->PeekReg('/\\G,\s*(not\s*)?\(/') || !$this->MatchChar(',') ){
+ break;
+ }
+ $b = $this->parseCondition();
+ if( !$b ){
+ break;
+ }
+
+ $return = $this->NewObj4('Less_Tree_Condition',array('or', $return, $b, $index));
+ }
+ return $return;
+ }
+ }
+
+ private function parseCondition() {
+ $index = $this->pos;
+ $negate = false;
+ $c = null;
+
+ if ($this->MatchReg('/\\Gnot/')) $negate = true;
+ $this->expectChar('(');
+ $a = $this->MatchFuncs(array('parseAddition','parseEntitiesKeyword','parseEntitiesQuoted'));
+
+ if( $a ){
+ $op = $this->MatchReg('/\\G(?:>=|<=|=<|[<=>])/');
+ if( $op ){
+ $b = $this->MatchFuncs(array('parseAddition','parseEntitiesKeyword','parseEntitiesQuoted'));
+ if( $b ){
+ $c = $this->NewObj5('Less_Tree_Condition',array($op[0], $a, $b, $index, $negate));
+ } else {
+ $this->Error('Unexpected expression');
+ }
+ } else {
+ $k = $this->NewObj1('Less_Tree_Keyword','true');
+ $c = $this->NewObj5('Less_Tree_Condition',array('=', $a, $k, $index, $negate));
+ }
+ $this->expectChar(')');
+ return $this->MatchReg('/\\Gand/') ? $this->NewObj3('Less_Tree_Condition',array('and', $c, $this->parseCondition())) : $c;
+ }
+ }
+
+ /**
+ * An operand is anything that can be part of an operation,
+ * such as a Color, or a Variable
+ *
+ */
+ private function parseOperand (){
+
+ $negate = false;
+ $offset = $this->pos+1;
+ if( $offset >= $this->input_len ){
+ return;
+ }
+ $char = $this->input[$offset];
+ if( $char === '@' || $char === '(' ){
+ $negate = $this->MatchChar('-');
+ }
+
+ $o = $this->MatchFuncs(array('parseSub','parseEntitiesDimension','parseEntitiesColor','parseEntitiesVariable','parseEntitiesCall'));
+
+ if( $negate ){
+ $o->parensInOp = true;
+ $o = $this->NewObj1('Less_Tree_Negative',$o);
+ }
+
+ return $o;
+ }
+
+
+ /**
+ * Expressions either represent mathematical operations,
+ * or white-space delimited Entities.
+ *
+ * 1px solid black
+ * @var * 2
+ *
+ * @return Less_Tree_Expression|null
+ */
+ private function parseExpression (){
+ $entities = array();
+
+ do{
+ $e = $this->MatchFuncs(array('parseAddition','parseEntity'));
+ if( $e ){
+ $entities[] = $e;
+ // operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here
+ if( !$this->PeekReg('/\\G\/[\/*]/') ){
+ $delim = $this->MatchChar('/');
+ if( $delim ){
+ $entities[] = $this->NewObj1('Less_Tree_Anonymous',$delim);
+ }
+ }
+ }
+ }while($e);
+
+ if( $entities ){
+ return $this->NewObj1('Less_Tree_Expression',$entities);
+ }
+ }
+
+
+ /**
+ * Parse a property
+ * eg: 'min-width', 'orientation', etc
+ *
+ * @return string
+ */
+ private function parseProperty (){
+ $name = $this->MatchReg('/\\G(\*?-?[_a-zA-Z0-9-]+)\s*:/');
+ if( $name ){
+ return $name[1];
+ }
+ }
+
+
+ /**
+ * Parse a rule property
+ * eg: 'color', 'width', 'height', etc
+ *
+ * @return string
+ */
+ private function parseRuleProperty(){
+ $offset = $this->pos;
+ $name = array();
+ $index = array();
+ $length = 0;
+
+
+ $this->rulePropertyMatch('/\\G(\*?)/', $offset, $length, $index, $name );
+ while( $this->rulePropertyMatch('/\\G((?:[\w-]+)|(?:@\{[\w-]+\}))/', $offset, $length, $index, $name )); // !
+
+ if( (count($name) > 1) && $this->rulePropertyMatch('/\\G\s*((?:\+_|\+)?)\s*:/', $offset, $length, $index, $name) ){
+ // at last, we have the complete match now. move forward,
+ // convert name particles to tree objects and return:
+ $this->skipWhitespace($length);
+
+ if( $name[0] === '' ){
+ array_shift($name);
+ array_shift($index);
+ }
+ foreach($name as $k => $s ){
+ if( !$s || $s[0] !== '@' ){
+ $name[$k] = $this->NewObj1('Less_Tree_Keyword',$s);
+ }else{
+ $name[$k] = $this->NewObj3('Less_Tree_Variable',array('@' . substr($s,2,-1), $index[$k], $this->env->currentFileInfo));
+ }
+ }
+ return $name;
+ }
+
+
+ }
+
+ private function rulePropertyMatch( $re, &$offset, &$length, &$index, &$name ){
+ preg_match($re, $this->input, $a, 0, $offset);
+ if( $a ){
+ $index[] = $this->pos + $length;
+ $length += strlen($a[0]);
+ $offset += strlen($a[0]);
+ $name[] = $a[1];
+ return true;
+ }
+ }
+
+ public static function serializeVars( $vars ){
+ $s = '';
+
+ foreach($vars as $name => $value){
+ $s .= (($name[0] === '@') ? '' : '@') . $name .': '. $value . ((substr($value,-1) === ';') ? '' : ';');
+ }
+
+ return $s;
+ }
+
+
+ /**
+ * Some versions of php have trouble with method_exists($a,$b) if $a is not an object
+ *
+ * @param string $b
+ */
+ public static function is_method($a,$b){
+ return is_object($a) && method_exists($a,$b);
+ }
+
+
+ /**
+ * Round numbers similarly to javascript
+ * eg: 1.499999 to 1 instead of 2
+ *
+ */
+ public static function round($i, $precision = 0){
+
+ $precision = pow(10,$precision);
+ $i = $i*$precision;
+
+ $ceil = ceil($i);
+ $floor = floor($i);
+ if( ($ceil - $i) <= ($i - $floor) ){
+ return $ceil/$precision;
+ }else{
+ return $floor/$precision;
+ }
+ }
+
+
+ /**
+ * Create Less_Tree_* objects and optionally generate a cache string
+ *
+ * @return mixed
+ */
+ public function NewObj0($class){
+ $obj = new $class();
+ if( $this->CacheEnabled() ){
+ $obj->cache_string = ' new '.$class.'()';
+ }
+ return $obj;
+ }
+
+ public function NewObj1($class, $arg){
+ $obj = new $class( $arg );
+ if( $this->CacheEnabled() ){
+ $obj->cache_string = ' new '.$class.'('.Less_Parser::ArgString($arg).')';
+ }
+ return $obj;
+ }
+
+ public function NewObj2($class, $args){
+ $obj = new $class( $args[0], $args[1] );
+ if( $this->CacheEnabled() ){
+ $this->ObjCache( $obj, $class, $args);
+ }
+ return $obj;
+ }
+
+ public function NewObj3($class, $args){
+ $obj = new $class( $args[0], $args[1], $args[2] );
+ if( $this->CacheEnabled() ){
+ $this->ObjCache( $obj, $class, $args);
+ }
+ return $obj;
+ }
+
+ public function NewObj4($class, $args){
+ $obj = new $class( $args[0], $args[1], $args[2], $args[3] );
+ if( $this->CacheEnabled() ){
+ $this->ObjCache( $obj, $class, $args);
+ }
+ return $obj;
+ }
+
+ public function NewObj5($class, $args){
+ $obj = new $class( $args[0], $args[1], $args[2], $args[3], $args[4] );
+ if( $this->CacheEnabled() ){
+ $this->ObjCache( $obj, $class, $args);
+ }
+ return $obj;
+ }
+
+ public function NewObj6($class, $args){
+ $obj = new $class( $args[0], $args[1], $args[2], $args[3], $args[4], $args[5] );
+ if( $this->CacheEnabled() ){
+ $this->ObjCache( $obj, $class, $args);
+ }
+ return $obj;
+ }
+
+ public function NewObj7($class, $args){
+ $obj = new $class( $args[0], $args[1], $args[2], $args[3], $args[4], $args[5], $args[6] );
+ if( $this->CacheEnabled() ){
+ $this->ObjCache( $obj, $class, $args);
+ }
+ return $obj;
+ }
+
+ //caching
+ public function ObjCache($obj, $class, $args=array()){
+ $obj->cache_string = ' new '.$class.'('. self::ArgCache($args).')';
+ }
+
+ public function ArgCache($args){
+ return implode(',',array_map( array('Less_Parser','ArgString'),$args));
+ }
+
+
+ /**
+ * Convert an argument to a string for use in the parser cache
+ *
+ * @return string
+ */
+ public static function ArgString($arg){
+
+ $type = gettype($arg);
+
+ if( $type === 'object'){
+ $string = $arg->cache_string;
+ unset($arg->cache_string);
+ return $string;
+
+ }elseif( $type === 'array' ){
+ $string = ' Array(';
+ foreach($arg as $k => $a){
+ $string .= var_export($k,true).' => '.self::ArgString($a).',';
+ }
+ return $string . ')';
+ }
+
+ return var_export($arg,true);
+ }
+
+ public function Error($msg){
+ throw new Less_Exception_Parser($msg, null, $this->furthest, $this->env->currentFileInfo);
+ }
+
+ public static function WinPath($path){
+ return str_replace('\\', '/', $path);
+ }
+
+ public static function AbsPath($path, $winPath = false){
+ if (strpos($path, '//') !== false && preg_match('_^(https?:)?//\\w+(\\.\\w+)+/\\w+_i', $path)) {
+ return $winPath ? '' : false;
+ } else {
+ $path = realpath($path);
+ if ($winPath) {
+ $path = self::WinPath($path);
+ }
+ return $path;
+ }
+ }
+
+ public function CacheEnabled(){
+ return (Less_Parser::$options['cache_method'] && (Less_Cache::$cache_dir || (Less_Parser::$options['cache_method'] == 'callback')));
+ }
+
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 04:54:52 +0000