diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/less.php/Cache.php | 316 | ||||
| -rw-r--r-- | lib/less.php/Less.php | 10510 | ||||
| -rw-r--r-- | lib/less.php/Version.php | 15 |
3 files changed, 10841 insertions, 0 deletions
diff --git a/lib/less.php/Cache.php b/lib/less.php/Cache.php new file mode 100644 index 0000000..8c8be39 --- /dev/null +++ b/lib/less.php/Cache.php @@ -0,0 +1,316 @@ +<?php + +require_once( dirname(__FILE__).'/Version.php'); + +/** + * Utility for handling the generation and caching of css files + * + * @package Less + * @subpackage cache + * + */ +class Less_Cache{ + + // directory less.php can use for storing data + public static $cache_dir = false; + + // prefix for the storing data + public static $prefix = 'lessphp_'; + + // prefix for the storing vars + public static $prefix_vars = 'lessphpvars_'; + + // specifies the number of seconds after which data created by less.php will be seen as 'garbage' and potentially cleaned up + public static $gc_lifetime = 604800; + + + /** + * Save and reuse the results of compiled less files. + * The first call to Get() will generate css and save it. + * Subsequent calls to Get() with the same arguments will return the same css filename + * + * @param array $less_files Array of .less files to compile + * @param array $parser_options Array of compiler options + * @param array $modify_vars Array of variables + * @return string Name of the css file + */ + public static function Get( $less_files, $parser_options = array(), $modify_vars = array() ){ + + + //check $cache_dir + if( isset($parser_options['cache_dir']) ){ + Less_Cache::$cache_dir = $parser_options['cache_dir']; + } + + if( empty(Less_Cache::$cache_dir) ){ + throw new Exception('cache_dir not set'); + } + + if( isset($parser_options['prefix']) ){ + Less_Cache::$prefix = $parser_options['prefix']; + } + + if( empty(Less_Cache::$prefix) ){ + throw new Exception('prefix not set'); + } + + if( isset($parser_options['prefix_vars']) ){ + Less_Cache::$prefix_vars = $parser_options['prefix_vars']; + } + + if( empty(Less_Cache::$prefix_vars) ){ + throw new Exception('prefix_vars not set'); + } + + self::CheckCacheDir(); + $less_files = (array)$less_files; + + + //create a file for variables + if( !empty($modify_vars) ){ + $lessvars = Less_Parser::serializeVars($modify_vars); + $vars_file = Less_Cache::$cache_dir . Less_Cache::$prefix_vars . sha1($lessvars) . '.less'; + + if( !file_exists($vars_file) ){ + file_put_contents($vars_file, $lessvars); + } + + $less_files += array($vars_file => '/'); + } + + + // generate name for compiled css file + $hash = md5(json_encode($less_files)); + $list_file = Less_Cache::$cache_dir . Less_Cache::$prefix . $hash . '.list'; + + + // check cached content + if( !isset($parser_options['use_cache']) || $parser_options['use_cache'] === true ){ + if( file_exists($list_file) ){ + + self::ListFiles($list_file, $list, $cached_name); + $compiled_name = self::CompiledName($list); + + // if $cached_name is the same as the $compiled name, don't regenerate + if( !$cached_name || $cached_name === $compiled_name ){ + + $output_file = self::OutputFile($compiled_name, $parser_options ); + + if( $output_file && file_exists($output_file) ){ + @touch($list_file); + return basename($output_file); // for backwards compatibility, we just return the name of the file + } + } + } + } + + $compiled = self::Cache( $less_files, $parser_options ); + if( !$compiled ){ + return false; + } + + $compiled_name = self::CompiledName( $less_files ); + $output_file = self::OutputFile($compiled_name, $parser_options ); + + + //save the file list + $list = $less_files; + $list[] = $compiled_name; + $cache = implode("\n",$list); + file_put_contents( $list_file, $cache ); + + + //save the css + file_put_contents( $output_file, $compiled ); + + + //clean up + self::CleanCache(); + + return basename($output_file); + } + + /** + * Force the compiler to regenerate the cached css file + * + * @param array $less_files Array of .less files to compile + * @param array $parser_options Array of compiler options + * @param array $modify_vars Array of variables + * @return string Name of the css file + */ + public static function Regen( $less_files, $parser_options = array(), $modify_vars = array() ){ + $parser_options['use_cache'] = false; + return self::Get( $less_files, $parser_options, $modify_vars ); + } + + public static function Cache( &$less_files, $parser_options = array() ){ + + + // get less.php if it exists + $file = dirname(__FILE__) . '/Less.php'; + if( file_exists($file) && !class_exists('Less_Parser') ){ + require_once($file); + } + + $parser_options['cache_dir'] = Less_Cache::$cache_dir; + $parser = new Less_Parser($parser_options); + + + // combine files + foreach($less_files as $file_path => $uri_or_less ){ + + //treat as less markup if there are newline characters + if( strpos($uri_or_less,"\n") !== false ){ + $parser->Parse( $uri_or_less ); + continue; + } + + $parser->ParseFile( $file_path, $uri_or_less ); + } + + $compiled = $parser->getCss(); + + + $less_files = $parser->allParsedFiles(); + + return $compiled; + } + + + private static function OutputFile( $compiled_name, $parser_options ){ + + //custom output file + if( !empty($parser_options['output']) ){ + + //relative to cache directory? + if( preg_match('#[\\\\/]#',$parser_options['output']) ){ + return $parser_options['output']; + } + + return Less_Cache::$cache_dir.$parser_options['output']; + } + + return Less_Cache::$cache_dir.$compiled_name; + } + + + private static function CompiledName( $files ){ + + //save the file list + $temp = array(Less_Version::cache_version); + foreach($files as $file){ + $temp[] = filemtime($file)."\t".filesize($file)."\t".$file; + } + + return Less_Cache::$prefix.sha1(json_encode($temp)).'.css'; + } + + + public static function SetCacheDir( $dir ){ + Less_Cache::$cache_dir = $dir; + } + + public static function CheckCacheDir(){ + + Less_Cache::$cache_dir = str_replace('\\','/',Less_Cache::$cache_dir); + Less_Cache::$cache_dir = rtrim(Less_Cache::$cache_dir,'/').'/'; + + if( !file_exists(Less_Cache::$cache_dir) ){ + if( !mkdir(Less_Cache::$cache_dir) ){ + throw new Less_Exception_Parser('Less.php cache directory couldn\'t be created: '.Less_Cache::$cache_dir); + } + + }elseif( !is_dir(Less_Cache::$cache_dir) ){ + throw new Less_Exception_Parser('Less.php cache directory doesn\'t exist: '.Less_Cache::$cache_dir); + + }elseif( !is_writable(Less_Cache::$cache_dir) ){ + throw new Less_Exception_Parser('Less.php cache directory isn\'t writable: '.Less_Cache::$cache_dir); + + } + + } + + + /** + * Delete unused less.php files + * + */ + public static function CleanCache(){ + static $clean = false; + + if( $clean ){ + return; + } + + $files = scandir(Less_Cache::$cache_dir); + if( $files ){ + $check_time = time() - self::$gc_lifetime; + foreach($files as $file){ + + // don't delete if the file wasn't created with less.php + if( strpos($file,Less_Cache::$prefix) !== 0 ){ + continue; + } + + $full_path = Less_Cache::$cache_dir . $file; + + // make sure the file still exists + // css files may have already been deleted + if( !file_exists($full_path) ){ + continue; + } + $mtime = filemtime($full_path); + + // don't delete if it's a relatively new file + if( $mtime > $check_time ){ + continue; + } + + $parts = explode('.',$file); + $type = array_pop($parts); + + + // delete css files based on the list files + if( $type === 'css' ){ + continue; + } + + + // delete the list file and associated css file + if( $type === 'list' ){ + self::ListFiles($full_path, $list, $css_file_name); + if( $css_file_name ){ + $css_file = Less_Cache::$cache_dir . $css_file_name; + if( file_exists($css_file) ){ + unlink($css_file); + } + } + } + + unlink($full_path); + } + } + + $clean = true; + } + + + /** + * Get the list of less files and generated css file from a list file + * + */ + static function ListFiles($list_file, &$list, &$css_file_name ){ + + $list = explode("\n",file_get_contents($list_file)); + + //pop the cached name that should match $compiled_name + $css_file_name = array_pop($list); + + if( !preg_match('/^' . Less_Cache::$prefix . '[a-f0-9]+\.css$/',$css_file_name) ){ + $list[] = $css_file_name; + $css_file_name = false; + } + + } + +} diff --git a/lib/less.php/Less.php b/lib/less.php/Less.php new file mode 100644 index 0000000..69122e1 --- /dev/null +++ b/lib/less.php/Less.php @@ -0,0 +1,10510 @@ +<?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' => array(), // 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, + + '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); + $this->env->Init(); + + //set new options + if( is_array($options) ){ + $this->SetOptions(Less_Parser::$default_options); + $this->SetOptions($options); + } + } + + /** + * 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 $css; + } + + /** + * Run pre-compile visitors + * + */ + private function PreVisitors($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 ){ + $filename = self::WinPath(realpath($filename)); + } + $uri_root = self::WinPath($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($this->saveStack); + } + + + private function isWhitespace($offset = 0) { + return preg_match('/\s/',$this->input[ $this->pos + $offset]); + } + + /** + * 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 ){ + $this->Error( $msg ? "Expected '" . $tok . "' got '" . $this->input[$this->pos] . "'" : $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 + } + + if( $this->input[$j] != '"' && $this->input[$j] !== "'" ){ + return; + } + + if ($e) { + $this->MatchChar('~'); + } + + // Fix for #124: match escaped newlines + //$str = $this->MatchReg('/\\G"((?:[^"\\\\\r\n]|\\\\.)*)"|\'((?:[^\'\\\\\r\n]|\\\\.)*)\'/'); + $str = $this->MatchReg('/\\G"((?:[^"\\\\\r\n]|\\\\.|\\\\\r\n|\\\\[\n\r\f])*)"|\'((?:[^\'\\\\\r\n]|\\\\.|\\\\\r\n|\\\\[\n\r\f])*)\'/'); + + if( $str ){ + $result = $str[0][0] == '"' ? $str[1] : $str[2]; + return $this->NewObj5('Less_Tree_Quoted',array($str[0], $result, $e, $index, $this->env->currentFileInfo) ); + } + return; + } + + + // + // A catch-all word, such as: + // + // black border-collapse + // + private function parseEntitiesKeyword(){ + + //$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 useing 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 ommitted. + // + 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)/'); + 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('\\', '/', $path); + } + + public function CacheEnabled(){ + return (Less_Parser::$options['cache_method'] && (Less_Cache::$cache_dir || (Less_Parser::$options['cache_method'] == 'callback'))); + } + +} + + + + +/** + * Utility for css colors + * + * @package Less + * @subpackage color + */ +class Less_Colors { + + public static $colors = array( + 'aliceblue'=>'#f0f8ff', + 'antiquewhite'=>'#faebd7', + 'aqua'=>'#00ffff', + 'aquamarine'=>'#7fffd4', + 'azure'=>'#f0ffff', + 'beige'=>'#f5f5dc', + 'bisque'=>'#ffe4c4', + 'black'=>'#000000', + 'blanchedalmond'=>'#ffebcd', + 'blue'=>'#0000ff', + 'blueviolet'=>'#8a2be2', + 'brown'=>'#a52a2a', + 'burlywood'=>'#deb887', + 'cadetblue'=>'#5f9ea0', + 'chartreuse'=>'#7fff00', + 'chocolate'=>'#d2691e', + 'coral'=>'#ff7f50', + 'cornflowerblue'=>'#6495ed', + 'cornsilk'=>'#fff8dc', + 'crimson'=>'#dc143c', + 'cyan'=>'#00ffff', + 'darkblue'=>'#00008b', + 'darkcyan'=>'#008b8b', + 'darkgoldenrod'=>'#b8860b', + 'darkgray'=>'#a9a9a9', + 'darkgrey'=>'#a9a9a9', + 'darkgreen'=>'#006400', + 'darkkhaki'=>'#bdb76b', + 'darkmagenta'=>'#8b008b', + 'darkolivegreen'=>'#556b2f', + 'darkorange'=>'#ff8c00', + 'darkorchid'=>'#9932cc', + 'darkred'=>'#8b0000', + 'darksalmon'=>'#e9967a', + 'darkseagreen'=>'#8fbc8f', + 'darkslateblue'=>'#483d8b', + 'darkslategray'=>'#2f4f4f', + 'darkslategrey'=>'#2f4f4f', + 'darkturquoise'=>'#00ced1', + 'darkviolet'=>'#9400d3', + 'deeppink'=>'#ff1493', + 'deepskyblue'=>'#00bfff', + 'dimgray'=>'#696969', + 'dimgrey'=>'#696969', + 'dodgerblue'=>'#1e90ff', + 'firebrick'=>'#b22222', + 'floralwhite'=>'#fffaf0', + 'forestgreen'=>'#228b22', + 'fuchsia'=>'#ff00ff', + 'gainsboro'=>'#dcdcdc', + 'ghostwhite'=>'#f8f8ff', + 'gold'=>'#ffd700', + 'goldenrod'=>'#daa520', + 'gray'=>'#808080', + 'grey'=>'#808080', + 'green'=>'#008000', + 'greenyellow'=>'#adff2f', + 'honeydew'=>'#f0fff0', + 'hotpink'=>'#ff69b4', + 'indianred'=>'#cd5c5c', + 'indigo'=>'#4b0082', + 'ivory'=>'#fffff0', + 'khaki'=>'#f0e68c', + 'lavender'=>'#e6e6fa', + 'lavenderblush'=>'#fff0f5', + 'lawngreen'=>'#7cfc00', + 'lemonchiffon'=>'#fffacd', + 'lightblue'=>'#add8e6', + 'lightcoral'=>'#f08080', + 'lightcyan'=>'#e0ffff', + 'lightgoldenrodyellow'=>'#fafad2', + 'lightgray'=>'#d3d3d3', + 'lightgrey'=>'#d3d3d3', + 'lightgreen'=>'#90ee90', + 'lightpink'=>'#ffb6c1', + 'lightsalmon'=>'#ffa07a', + 'lightseagreen'=>'#20b2aa', + 'lightskyblue'=>'#87cefa', + 'lightslategray'=>'#778899', + 'lightslategrey'=>'#778899', + 'lightsteelblue'=>'#b0c4de', + 'lightyellow'=>'#ffffe0', + 'lime'=>'#00ff00', + 'limegreen'=>'#32cd32', + 'linen'=>'#faf0e6', + 'magenta'=>'#ff00ff', + 'maroon'=>'#800000', + 'mediumaquamarine'=>'#66cdaa', + 'mediumblue'=>'#0000cd', + 'mediumorchid'=>'#ba55d3', + 'mediumpurple'=>'#9370d8', + 'mediumseagreen'=>'#3cb371', + 'mediumslateblue'=>'#7b68ee', + 'mediumspringgreen'=>'#00fa9a', + 'mediumturquoise'=>'#48d1cc', + 'mediumvioletred'=>'#c71585', + 'midnightblue'=>'#191970', + 'mintcream'=>'#f5fffa', + 'mistyrose'=>'#ffe4e1', + 'moccasin'=>'#ffe4b5', + 'navajowhite'=>'#ffdead', + 'navy'=>'#000080', + 'oldlace'=>'#fdf5e6', + 'olive'=>'#808000', + 'olivedrab'=>'#6b8e23', + 'orange'=>'#ffa500', + 'orangered'=>'#ff4500', + 'orchid'=>'#da70d6', + 'palegoldenrod'=>'#eee8aa', + 'palegreen'=>'#98fb98', + 'paleturquoise'=>'#afeeee', + 'palevioletred'=>'#d87093', + 'papayawhip'=>'#ffefd5', + 'peachpuff'=>'#ffdab9', + 'peru'=>'#cd853f', + 'pink'=>'#ffc0cb', + 'plum'=>'#dda0dd', + 'powderblue'=>'#b0e0e6', + 'purple'=>'#800080', + 'red'=>'#ff0000', + 'rosybrown'=>'#bc8f8f', + 'royalblue'=>'#4169e1', + 'saddlebrown'=>'#8b4513', + 'salmon'=>'#fa8072', + 'sandybrown'=>'#f4a460', + 'seagreen'=>'#2e8b57', + 'seashell'=>'#fff5ee', + 'sienna'=>'#a0522d', + 'silver'=>'#c0c0c0', + 'skyblue'=>'#87ceeb', + 'slateblue'=>'#6a5acd', + 'slategray'=>'#708090', + 'slategrey'=>'#708090', + 'snow'=>'#fffafa', + 'springgreen'=>'#00ff7f', + 'steelblue'=>'#4682b4', + 'tan'=>'#d2b48c', + 'teal'=>'#008080', + 'thistle'=>'#d8bfd8', + 'tomato'=>'#ff6347', + 'turquoise'=>'#40e0d0', + 'violet'=>'#ee82ee', + 'wheat'=>'#f5deb3', + 'white'=>'#ffffff', + 'whitesmoke'=>'#f5f5f5', + 'yellow'=>'#ffff00', + 'yellowgreen'=>'#9acd32' + ); + + public static function hasOwnProperty($color) { + return isset(self::$colors[$color]); + } + + + public static function color($color) { + return self::$colors[$color]; + } + +} + + + +/** + * Environment + * + * @package Less + * @subpackage environment + */ +class Less_Environment{ + + //public $paths = array(); // option - unmodified - paths to search for imports on + //public static $files = array(); // list of files that have been imported, used for import-once + //public $rootpath; // option - rootpath to append to URL's + //public static $strictImports = null; // option - + //public $insecure; // option - whether to allow imports from insecure ssl hosts + //public $processImports; // option - whether to process imports. if false then imports will not be imported + //public $javascriptEnabled; // option - whether JavaScript is enabled. if undefined, defaults to true + //public $useFileCache; // browser only - whether to use the per file session cache + public $currentFileInfo; // information about the current file - for error reporting and importing and making urls relative etc. + + public $importMultiple = false; // whether we are currently importing multiple copies + + + /** + * @var array + */ + public $frames = array(); + + /** + * @var array + */ + public $mediaBlocks = array(); + + /** + * @var array + */ + public $mediaPath = array(); + + public static $parensStack = 0; + + public static $tabLevel = 0; + + public static $lastRule = false; + + public static $_outputMap; + + public static $mixin_stack = 0; + + /** + * @var array + */ + public $functions = array(); + + + public function Init(){ + + self::$parensStack = 0; + self::$tabLevel = 0; + self::$lastRule = false; + self::$mixin_stack = 0; + + if( Less_Parser::$options['compress'] ){ + + Less_Environment::$_outputMap = array( + ',' => ',', + ': ' => ':', + '' => '', + ' ' => ' ', + ':' => ' :', + '+' => '+', + '~' => '~', + '>' => '>', + '|' => '|', + '^' => '^', + '^^' => '^^' + ); + + }else{ + + Less_Environment::$_outputMap = array( + ',' => ', ', + ': ' => ': ', + '' => '', + ' ' => ' ', + ':' => ' :', + '+' => ' + ', + '~' => ' ~ ', + '>' => ' > ', + '|' => '|', + '^' => ' ^ ', + '^^' => ' ^^ ' + ); + + } + } + + + public function copyEvalEnv($frames = array() ){ + $new_env = new Less_Environment(); + $new_env->frames = $frames; + return $new_env; + } + + + public static function isMathOn(){ + return !Less_Parser::$options['strictMath'] || Less_Environment::$parensStack; + } + + public static function isPathRelative($path){ + return !preg_match('/^(?:[a-z-]+:|\/)/',$path); + } + + + /** + * Canonicalize a path by resolving references to '/./', '/../' + * Does not remove leading "../" + * @param string path or url + * @return string Canonicalized path + * + */ + public static function normalizePath($path){ + + $segments = explode('/',$path); + $segments = array_reverse($segments); + + $path = array(); + $path_len = 0; + + while( $segments ){ + $segment = array_pop($segments); + switch( $segment ) { + + case '.': + break; + + case '..': + if( !$path_len || ( $path[$path_len-1] === '..') ){ + $path[] = $segment; + $path_len++; + }else{ + array_pop($path); + $path_len--; + } + break; + + default: + $path[] = $segment; + $path_len++; + break; + } + } + + return implode('/',$path); + } + + + public function unshiftFrame($frame){ + array_unshift($this->frames, $frame); + } + + public function shiftFrame(){ + return array_shift($this->frames); + } + +} + + +/** + * Builtin functions + * + * @package Less + * @subpackage function + * @see http://lesscss.org/functions/ + */ +class Less_Functions{ + + public $env; + public $currentFileInfo; + + function __construct($env, $currentFileInfo = null ){ + $this->env = $env; + $this->currentFileInfo = $currentFileInfo; + } + + /** + * @param string $op + */ + public static function operate( $op, $a, $b ){ + switch ($op) { + case '+': return $a + $b; + case '-': return $a - $b; + case '*': return $a * $b; + case '/': return $a / $b; + } + } + + public static function clamp($val, $max = 1){ + return min( max($val, 0), $max); + } + + public static function fround( $value ){ + + if( $value === 0 ){ + return $value; + } + + if( Less_Parser::$options['numPrecision'] ){ + $p = pow(10, Less_Parser::$options['numPrecision']); + return round( $value * $p) / $p; + } + return $value; + } + + public static function number($n){ + + if ($n instanceof Less_Tree_Dimension) { + return floatval( $n->unit->is('%') ? $n->value / 100 : $n->value); + } else if (is_numeric($n)) { + return $n; + } else { + throw new Less_Exception_Compiler("color functions take numbers as parameters"); + } + } + + public static function scaled($n, $size = 255 ){ + if( $n instanceof Less_Tree_Dimension && $n->unit->is('%') ){ + return (float)$n->value * $size / 100; + } else { + return Less_Functions::number($n); + } + } + + public function rgb ($r = null, $g = null, $b = null){ + if (is_null($r) || is_null($g) || is_null($b)) { + throw new Less_Exception_Compiler("rgb expects three parameters"); + } + return $this->rgba($r, $g, $b, 1.0); + } + + public function rgba($r = null, $g = null, $b = null, $a = null){ + $rgb = array($r, $g, $b); + $rgb = array_map(array('Less_Functions','scaled'),$rgb); + + $a = self::number($a); + return new Less_Tree_Color($rgb, $a); + } + + public function hsl($h, $s, $l){ + return $this->hsla($h, $s, $l, 1.0); + } + + public function hsla($h, $s, $l, $a){ + + $h = fmod(self::number($h), 360) / 360; // Classic % operator will change float to int + $s = self::clamp(self::number($s)); + $l = self::clamp(self::number($l)); + $a = self::clamp(self::number($a)); + + $m2 = $l <= 0.5 ? $l * ($s + 1) : $l + $s - $l * $s; + + $m1 = $l * 2 - $m2; + + return $this->rgba( self::hsla_hue($h + 1/3, $m1, $m2) * 255, + self::hsla_hue($h, $m1, $m2) * 255, + self::hsla_hue($h - 1/3, $m1, $m2) * 255, + $a); + } + + /** + * @param double $h + */ + public function hsla_hue($h, $m1, $m2){ + $h = $h < 0 ? $h + 1 : ($h > 1 ? $h - 1 : $h); + if ($h * 6 < 1) return $m1 + ($m2 - $m1) * $h * 6; + else if ($h * 2 < 1) return $m2; + else if ($h * 3 < 2) return $m1 + ($m2 - $m1) * (2/3 - $h) * 6; + else return $m1; + } + + public function hsv($h, $s, $v) { + return $this->hsva($h, $s, $v, 1.0); + } + + /** + * @param double $a + */ + public function hsva($h, $s, $v, $a) { + $h = ((Less_Functions::number($h) % 360) / 360 ) * 360; + $s = Less_Functions::number($s); + $v = Less_Functions::number($v); + $a = Less_Functions::number($a); + + $i = floor(($h / 60) % 6); + $f = ($h / 60) - $i; + + $vs = array( $v, + $v * (1 - $s), + $v * (1 - $f * $s), + $v * (1 - (1 - $f) * $s)); + + $perm = array(array(0, 3, 1), + array(2, 0, 1), + array(1, 0, 3), + array(1, 2, 0), + array(3, 1, 0), + array(0, 1, 2)); + + return $this->rgba($vs[$perm[$i][0]] * 255, + $vs[$perm[$i][1]] * 255, + $vs[$perm[$i][2]] * 255, + $a); + } + + public function hue($color = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to hue must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $c = $color->toHSL(); + return new Less_Tree_Dimension(Less_Parser::round($c['h'])); + } + + public function saturation($color = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to saturation must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $c = $color->toHSL(); + return new Less_Tree_Dimension(Less_Parser::round($c['s'] * 100), '%'); + } + + public function lightness($color = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to lightness must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $c = $color->toHSL(); + return new Less_Tree_Dimension(Less_Parser::round($c['l'] * 100), '%'); + } + + public function hsvhue( $color = null ){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to hsvhue must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsv = $color->toHSV(); + return new Less_Tree_Dimension( Less_Parser::round($hsv['h']) ); + } + + + public function hsvsaturation( $color = null ){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to hsvsaturation must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsv = $color->toHSV(); + return new Less_Tree_Dimension( Less_Parser::round($hsv['s'] * 100), '%' ); + } + + public function hsvvalue( $color = null ){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to hsvvalue must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsv = $color->toHSV(); + return new Less_Tree_Dimension( Less_Parser::round($hsv['v'] * 100), '%' ); + } + + public function red($color = null) { + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to red must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return new Less_Tree_Dimension( $color->rgb[0] ); + } + + public function green($color = null) { + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to green must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return new Less_Tree_Dimension( $color->rgb[1] ); + } + + public function blue($color = null) { + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to blue must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return new Less_Tree_Dimension( $color->rgb[2] ); + } + + public function alpha($color = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to alpha must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $c = $color->toHSL(); + return new Less_Tree_Dimension($c['a']); + } + + public function luma ($color = null) { + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to luma must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return new Less_Tree_Dimension(Less_Parser::round( $color->luma() * $color->alpha * 100), '%'); + } + + public function luminance( $color = null ){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to luminance must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $luminance = + (0.2126 * $color->rgb[0] / 255) + + (0.7152 * $color->rgb[1] / 255) + + (0.0722 * $color->rgb[2] / 255); + + return new Less_Tree_Dimension(Less_Parser::round( $luminance * $color->alpha * 100), '%'); + } + + public function saturate($color = null, $amount = null){ + // filter: saturate(3.2); + // should be kept as is, so check for color + if ($color instanceof Less_Tree_Dimension) { + return null; + } + + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to saturate must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$amount instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The second argument to saturate must be a percentage' . ($amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsl = $color->toHSL(); + + $hsl['s'] += $amount->value / 100; + $hsl['s'] = self::clamp($hsl['s']); + + return $this->hsla($hsl['h'], $hsl['s'], $hsl['l'], $hsl['a']); + } + + /** + * @param Less_Tree_Dimension $amount + */ + public function desaturate($color = null, $amount = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to desaturate must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$amount instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The second argument to desaturate must be a percentage' . ($amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsl = $color->toHSL(); + + $hsl['s'] -= $amount->value / 100; + $hsl['s'] = self::clamp($hsl['s']); + + return $this->hsla($hsl['h'], $hsl['s'], $hsl['l'], $hsl['a']); + } + + + + public function lighten($color = null, $amount=null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to lighten must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$amount instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The second argument to lighten must be a percentage' . ($amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsl = $color->toHSL(); + + $hsl['l'] += $amount->value / 100; + $hsl['l'] = self::clamp($hsl['l']); + + return $this->hsla($hsl['h'], $hsl['s'], $hsl['l'], $hsl['a']); + } + + public function darken($color = null, $amount = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to darken must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$amount instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The second argument to darken must be a percentage' . ($amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsl = $color->toHSL(); + $hsl['l'] -= $amount->value / 100; + $hsl['l'] = self::clamp($hsl['l']); + + return $this->hsla($hsl['h'], $hsl['s'], $hsl['l'], $hsl['a']); + } + + public function fadein($color = null, $amount = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to fadein must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$amount instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The second argument to fadein must be a percentage' . ($amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsl = $color->toHSL(); + $hsl['a'] += $amount->value / 100; + $hsl['a'] = self::clamp($hsl['a']); + return $this->hsla($hsl['h'], $hsl['s'], $hsl['l'], $hsl['a']); + } + + public function fadeout($color = null, $amount = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to fadeout must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$amount instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The second argument to fadeout must be a percentage' . ($amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsl = $color->toHSL(); + $hsl['a'] -= $amount->value / 100; + $hsl['a'] = self::clamp($hsl['a']); + return $this->hsla($hsl['h'], $hsl['s'], $hsl['l'], $hsl['a']); + } + + public function fade($color = null, $amount = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to fade must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$amount instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The second argument to fade must be a percentage' . ($amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsl = $color->toHSL(); + + $hsl['a'] = $amount->value / 100; + $hsl['a'] = self::clamp($hsl['a']); + return $this->hsla($hsl['h'], $hsl['s'], $hsl['l'], $hsl['a']); + } + + + + public function spin($color = null, $amount = null){ + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to spin must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$amount instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The second argument to spin must be a number' . ($amount instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $hsl = $color->toHSL(); + $hue = fmod($hsl['h'] + $amount->value, 360); + + $hsl['h'] = $hue < 0 ? 360 + $hue : $hue; + + return $this->hsla($hsl['h'], $hsl['s'], $hsl['l'], $hsl['a']); + } + + // + // Copyright (c) 2006-2009 Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein + // http://sass-lang.com + // + + /** + * @param Less_Tree_Color $color1 + */ + public function mix($color1 = null, $color2 = null, $weight = null){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to mix must be a color' . ($color1 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to mix must be a color' . ($color2 instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$weight) { + $weight = new Less_Tree_Dimension('50', '%'); + } + if (!$weight instanceof Less_Tree_Dimension) { + throw new Less_Exception_Compiler('The third argument to contrast must be a percentage' . ($weight instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + $p = $weight->value / 100.0; + $w = $p * 2 - 1; + $hsl1 = $color1->toHSL(); + $hsl2 = $color2->toHSL(); + $a = $hsl1['a'] - $hsl2['a']; + + $w1 = (((($w * $a) == -1) ? $w : ($w + $a) / (1 + $w * $a)) + 1) / 2; + $w2 = 1 - $w1; + + $rgb = array($color1->rgb[0] * $w1 + $color2->rgb[0] * $w2, + $color1->rgb[1] * $w1 + $color2->rgb[1] * $w2, + $color1->rgb[2] * $w1 + $color2->rgb[2] * $w2); + + $alpha = $color1->alpha * $p + $color2->alpha * (1 - $p); + + return new Less_Tree_Color($rgb, $alpha); + } + + public function greyscale($color){ + return $this->desaturate($color, new Less_Tree_Dimension(100,'%')); + } + + + public function contrast( $color, $dark = null, $light = null, $threshold = null){ + // filter: contrast(3.2); + // should be kept as is, so check for color + if (!$color instanceof Less_Tree_Color) { + return null; + } + if( !$light ){ + $light = $this->rgba(255, 255, 255, 1.0); + } + if( !$dark ){ + $dark = $this->rgba(0, 0, 0, 1.0); + } + + if (!$dark instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to contrast must be a color' . ($dark instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$light instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The third argument to contrast must be a color' . ($light instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + //Figure out which is actually light and dark! + if( $dark->luma() > $light->luma() ){ + $t = $light; + $light = $dark; + $dark = $t; + } + if( !$threshold ){ + $threshold = 0.43; + } else { + $threshold = Less_Functions::number($threshold); + } + + if( $color->luma() < $threshold ){ + return $light; + } else { + return $dark; + } + } + + public function e ($str){ + if( is_string($str) ){ + return new Less_Tree_Anonymous($str); + } + return new Less_Tree_Anonymous($str instanceof Less_Tree_JavaScript ? $str->expression : $str->value); + } + + public function escape ($str){ + + $revert = array('%21'=>'!', '%2A'=>'*', '%27'=>"'",'%3F'=>'?','%26'=>'&','%2C'=>',','%2F'=>'/','%40'=>'@','%2B'=>'+','%24'=>'$'); + + return new Less_Tree_Anonymous(strtr(rawurlencode($str->value), $revert)); + } + + + /** + * todo: This function will need some additional work to make it work the same as less.js + * + */ + public function replace( $string, $pattern, $replacement, $flags = null ){ + $result = $string->value; + + $expr = '/'.str_replace('/','\\/',$pattern->value).'/'; + if( $flags && $flags->value){ + $expr .= self::replace_flags($flags->value); + } + + $result = preg_replace($expr,$replacement->value,$result); + + + if( property_exists($string,'quote') ){ + return new Less_Tree_Quoted( $string->quote, $result, $string->escaped); + } + return new Less_Tree_Quoted( '', $result ); + } + + public static function replace_flags($flags){ + $flags = str_split($flags,1); + $new_flags = ''; + + foreach($flags as $flag){ + switch($flag){ + case 'e': + case 'g': + break; + + default: + $new_flags .= $flag; + break; + } + } + + return $new_flags; + } + + public function _percent(){ + $string = func_get_arg(0); + + $args = func_get_args(); + array_shift($args); + $result = $string->value; + + foreach($args as $arg){ + if( preg_match('/%[sda]/i',$result, $token) ){ + $token = $token[0]; + $value = stristr($token, 's') ? $arg->value : $arg->toCSS(); + $value = preg_match('/[A-Z]$/', $token) ? urlencode($value) : $value; + $result = preg_replace('/%[sda]/i',$value, $result, 1); + } + } + $result = str_replace('%%', '%', $result); + + return new Less_Tree_Quoted( $string->quote , $result, $string->escaped); + } + + public function unit( $val, $unit = null) { + if( !($val instanceof Less_Tree_Dimension) ){ + throw new Less_Exception_Compiler('The first argument to unit must be a number' . ($val instanceof Less_Tree_Operation ? '. Have you forgotten parenthesis?' : '.') ); + } + + if( $unit ){ + if( $unit instanceof Less_Tree_Keyword ){ + $unit = $unit->value; + } else { + $unit = $unit->toCSS(); + } + } else { + $unit = ""; + } + return new Less_Tree_Dimension($val->value, $unit ); + } + + public function convert($val, $unit){ + return $val->convertTo($unit->value); + } + + public function round($n, $f = false) { + + $fraction = 0; + if( $f !== false ){ + $fraction = $f->value; + } + + return $this->_math('Less_Parser::round',null, $n, $fraction); + } + + public function pi(){ + return new Less_Tree_Dimension(M_PI); + } + + public function mod($a, $b) { + return new Less_Tree_Dimension( $a->value % $b->value, $a->unit); + } + + + + public function pow($x, $y) { + if( is_numeric($x) && is_numeric($y) ){ + $x = new Less_Tree_Dimension($x); + $y = new Less_Tree_Dimension($y); + }elseif( !($x instanceof Less_Tree_Dimension) || !($y instanceof Less_Tree_Dimension) ){ + throw new Less_Exception_Compiler('Arguments must be numbers'); + } + + return new Less_Tree_Dimension( pow($x->value, $y->value), $x->unit ); + } + + // var mathFunctions = [{name:"ce ... + public function ceil( $n ){ return $this->_math('ceil', null, $n); } + public function floor( $n ){ return $this->_math('floor', null, $n); } + public function sqrt( $n ){ return $this->_math('sqrt', null, $n); } + public function abs( $n ){ return $this->_math('abs', null, $n); } + + public function tan( $n ){ return $this->_math('tan', '', $n); } + public function sin( $n ){ return $this->_math('sin', '', $n); } + public function cos( $n ){ return $this->_math('cos', '', $n); } + + public function atan( $n ){ return $this->_math('atan', 'rad', $n); } + public function asin( $n ){ return $this->_math('asin', 'rad', $n); } + public function acos( $n ){ return $this->_math('acos', 'rad', $n); } + + private function _math() { + $args = func_get_args(); + $fn = array_shift($args); + $unit = array_shift($args); + + if ($args[0] instanceof Less_Tree_Dimension) { + + if( $unit === null ){ + $unit = $args[0]->unit; + }else{ + $args[0] = $args[0]->unify(); + } + $args[0] = (float)$args[0]->value; + return new Less_Tree_Dimension( call_user_func_array($fn, $args), $unit); + } else if (is_numeric($args[0])) { + return call_user_func_array($fn,$args); + } else { + throw new Less_Exception_Compiler("math functions take numbers as parameters"); + } + } + + /** + * @param boolean $isMin + */ + private function _minmax( $isMin, $args ){ + + $arg_count = count($args); + + if( $arg_count < 1 ){ + throw new Less_Exception_Compiler( 'one or more arguments required'); + } + + $j = null; + $unitClone = null; + $unitStatic = null; + + + $order = array(); // elems only contains original argument values. + $values = array(); // key is the unit.toString() for unified tree.Dimension values, + // value is the index into the order array. + + + for( $i = 0; $i < $arg_count; $i++ ){ + $current = $args[$i]; + if( !($current instanceof Less_Tree_Dimension) ){ + if( is_array($args[$i]->value) ){ + $args[] = $args[$i]->value; + } + continue; + } + + if( $current->unit->toString() === '' && !$unitClone ){ + $temp = new Less_Tree_Dimension($current->value, $unitClone); + $currentUnified = $temp->unify(); + }else{ + $currentUnified = $current->unify(); + } + + if( $currentUnified->unit->toString() === "" && !$unitStatic ){ + $unit = $unitStatic; + }else{ + $unit = $currentUnified->unit->toString(); + } + + if( $unit !== '' && !$unitStatic || $unit !== '' && $order[0]->unify()->unit->toString() === "" ){ + $unitStatic = $unit; + } + + if( $unit != '' && !$unitClone ){ + $unitClone = $current->unit->toString(); + } + + if( isset($values['']) && $unit !== '' && $unit === $unitStatic ){ + $j = $values['']; + }elseif( isset($values[$unit]) ){ + $j = $values[$unit]; + }else{ + + if( $unitStatic && $unit !== $unitStatic ){ + throw new Less_Exception_Compiler( 'incompatible types'); + } + $values[$unit] = count($order); + $order[] = $current; + continue; + } + + + if( $order[$j]->unit->toString() === "" && $unitClone ){ + $temp = new Less_Tree_Dimension( $order[$j]->value, $unitClone); + $referenceUnified = $temp->unify(); + }else{ + $referenceUnified = $order[$j]->unify(); + } + if( ($isMin && $currentUnified->value < $referenceUnified->value) || (!$isMin && $currentUnified->value > $referenceUnified->value) ){ + $order[$j] = $current; + } + } + + if( count($order) == 1 ){ + return $order[0]; + } + $args = array(); + foreach($order as $a){ + $args[] = $a->toCSS($this->env); + } + return new Less_Tree_Anonymous( ($isMin?'min(':'max(') . implode(Less_Environment::$_outputMap[','],$args).')'); + } + + public function min(){ + $args = func_get_args(); + return $this->_minmax( true, $args ); + } + + public function max(){ + $args = func_get_args(); + return $this->_minmax( false, $args ); + } + + public function getunit($n){ + return new Less_Tree_Anonymous($n->unit); + } + + public function argb($color) { + if (!$color instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to argb must be a color' . ($dark instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return new Less_Tree_Anonymous($color->toARGB()); + } + + public function percentage($n) { + return new Less_Tree_Dimension($n->value * 100, '%'); + } + + public function color($n) { + + if( $n instanceof Less_Tree_Quoted ){ + $colorCandidate = $n->value; + $returnColor = Less_Tree_Color::fromKeyword($colorCandidate); + if( $returnColor ){ + return $returnColor; + } + if( preg_match('/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/',$colorCandidate) ){ + return new Less_Tree_Color(substr($colorCandidate, 1)); + } + throw new Less_Exception_Compiler("argument must be a color keyword or 3/6 digit hex e.g. #FFF"); + } else { + throw new Less_Exception_Compiler("argument must be a string"); + } + } + + + public function iscolor($n) { + return $this->_isa($n, 'Less_Tree_Color'); + } + + public function isnumber($n) { + return $this->_isa($n, 'Less_Tree_Dimension'); + } + + public function isstring($n) { + return $this->_isa($n, 'Less_Tree_Quoted'); + } + + public function iskeyword($n) { + return $this->_isa($n, 'Less_Tree_Keyword'); + } + + public function isurl($n) { + return $this->_isa($n, 'Less_Tree_Url'); + } + + public function ispixel($n) { + return $this->isunit($n, 'px'); + } + + public function ispercentage($n) { + return $this->isunit($n, '%'); + } + + public function isem($n) { + return $this->isunit($n, 'em'); + } + + /** + * @param string $unit + */ + public function isunit( $n, $unit ){ + return ($n instanceof Less_Tree_Dimension) && $n->unit->is( ( property_exists($unit,'value') ? $unit->value : $unit) ) ? new Less_Tree_Keyword('true') : new Less_Tree_Keyword('false'); + } + + /** + * @param string $type + */ + private function _isa($n, $type) { + return is_a($n, $type) ? new Less_Tree_Keyword('true') : new Less_Tree_Keyword('false'); + } + + public function tint($color, $amount) { + return $this->mix( $this->rgb(255,255,255), $color, $amount); + } + + public function shade($color, $amount) { + return $this->mix($this->rgb(0, 0, 0), $color, $amount); + } + + public function extract($values, $index ){ + $index = (int)$index->value - 1; // (1-based index) + // handle non-array values as an array of length 1 + // return 'undefined' if index is invalid + if( property_exists($values,'value') && is_array($values->value) ){ + if( isset($values->value[$index]) ){ + return $values->value[$index]; + } + return null; + + }elseif( (int)$index === 0 ){ + return $values; + } + + return null; + } + + public function length($values){ + $n = (property_exists($values,'value') && is_array($values->value)) ? count($values->value) : 1; + return new Less_Tree_Dimension($n); + } + + public function datauri($mimetypeNode, $filePathNode = null ) { + + $filePath = ( $filePathNode ? $filePathNode->value : null ); + $mimetype = $mimetypeNode->value; + + $args = 2; + if( !$filePath ){ + $filePath = $mimetype; + $args = 1; + } + + $filePath = str_replace('\\','/',$filePath); + if( Less_Environment::isPathRelative($filePath) ){ + + if( Less_Parser::$options['relativeUrls'] ){ + $temp = $this->currentFileInfo['currentDirectory']; + } else { + $temp = $this->currentFileInfo['entryPath']; + } + + if( !empty($temp) ){ + $filePath = Less_Environment::normalizePath(rtrim($temp,'/').'/'.$filePath); + } + + } + + + // detect the mimetype if not given + if( $args < 2 ){ + + /* incomplete + $mime = require('mime'); + mimetype = mime.lookup(path); + + // use base 64 unless it's an ASCII or UTF-8 format + var charset = mime.charsets.lookup(mimetype); + useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0; + if (useBase64) mimetype += ';base64'; + */ + + $mimetype = Less_Mime::lookup($filePath); + + $charset = Less_Mime::charsets_lookup($mimetype); + $useBase64 = !in_array($charset,array('US-ASCII', 'UTF-8')); + if( $useBase64 ){ $mimetype .= ';base64'; } + + }else{ + $useBase64 = preg_match('/;base64$/',$mimetype); + } + + + if( file_exists($filePath) ){ + $buf = @file_get_contents($filePath); + }else{ + $buf = false; + } + + + // IE8 cannot handle a data-uri larger than 32KB. If this is exceeded + // and the --ieCompat flag is enabled, return a normal url() instead. + $DATA_URI_MAX_KB = 32; + $fileSizeInKB = round( strlen($buf) / 1024 ); + if( $fileSizeInKB >= $DATA_URI_MAX_KB ){ + $url = new Less_Tree_Url( ($filePathNode ? $filePathNode : $mimetypeNode), $this->currentFileInfo); + return $url->compile($this); + } + + if( $buf ){ + $buf = $useBase64 ? base64_encode($buf) : rawurlencode($buf); + $filePath = '"data:' . $mimetype . ',' . $buf . '"'; + } + + return new Less_Tree_Url( new Less_Tree_Anonymous($filePath) ); + } + + //svg-gradient + public function svggradient( $direction ){ + + $throw_message = 'svg-gradient expects direction, start_color [start_position], [color position,]..., end_color [end_position]'; + $arguments = func_get_args(); + + if( count($arguments) < 3 ){ + throw new Less_Exception_Compiler( $throw_message ); + } + + $stops = array_slice($arguments,1); + $gradientType = 'linear'; + $rectangleDimension = 'x="0" y="0" width="1" height="1"'; + $useBase64 = true; + $directionValue = $direction->toCSS(); + + + switch( $directionValue ){ + case "to bottom": + $gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"'; + break; + case "to right": + $gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"'; + break; + case "to bottom right": + $gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"'; + break; + case "to top right": + $gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"'; + break; + case "ellipse": + case "ellipse at center": + $gradientType = "radial"; + $gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"'; + $rectangleDimension = 'x="-50" y="-50" width="101" height="101"'; + break; + default: + throw new Less_Exception_Compiler( "svg-gradient direction must be 'to bottom', 'to right', 'to bottom right', 'to top right' or 'ellipse at center'" ); + } + + $returner = '<?xml version="1.0" ?>' . + '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%" height="100%" viewBox="0 0 1 1" preserveAspectRatio="none">' . + '<' . $gradientType . 'Gradient id="gradient" gradientUnits="userSpaceOnUse" ' . $gradientDirectionSvg . '>'; + + for( $i = 0; $i < count($stops); $i++ ){ + if( is_object($stops[$i]) && property_exists($stops[$i],'value') ){ + $color = $stops[$i]->value[0]; + $position = $stops[$i]->value[1]; + }else{ + $color = $stops[$i]; + $position = null; + } + + if( !($color instanceof Less_Tree_Color) || (!(($i === 0 || $i+1 === count($stops)) && $position === null) && !($position instanceof Less_Tree_Dimension)) ){ + throw new Less_Exception_Compiler( $throw_message ); + } + if( $position ){ + $positionValue = $position->toCSS(); + }elseif( $i === 0 ){ + $positionValue = '0%'; + }else{ + $positionValue = '100%'; + } + $alpha = $color->alpha; + $returner .= '<stop offset="' . $positionValue . '" stop-color="' . $color->toRGB() . '"' . ($alpha < 1 ? ' stop-opacity="' . $alpha . '"' : '') . '/>'; + } + + $returner .= '</' . $gradientType . 'Gradient><rect ' . $rectangleDimension . ' fill="url(#gradient)" /></svg>'; + + + if( $useBase64 ){ + $returner = "'data:image/svg+xml;base64,".base64_encode($returner)."'"; + }else{ + $returner = "'data:image/svg+xml,".$returner."'"; + } + + return new Less_Tree_URL( new Less_Tree_Anonymous( $returner ) ); + } + + + /** + * Php version of javascript's `encodeURIComponent` function + * + * @param string $string The string to encode + * @return string The encoded string + */ + public static function encodeURIComponent($string){ + $revert = array('%21' => '!', '%2A' => '*', '%27' => "'", '%28' => '(', '%29' => ')'); + return strtr(rawurlencode($string), $revert); + } + + + // Color Blending + // ref: http://www.w3.org/TR/compositing-1 + + public function colorBlend( $mode, $color1, $color2 ){ + $ab = $color1->alpha; // backdrop + $as = $color2->alpha; // source + $r = array(); // result + + $ar = $as + $ab * (1 - $as); + for( $i = 0; $i < 3; $i++ ){ + $cb = $color1->rgb[$i] / 255; + $cs = $color2->rgb[$i] / 255; + $cr = call_user_func( $mode, $cb, $cs ); + if( $ar ){ + $cr = ($as * $cs + $ab * ($cb - $as * ($cb + $cs - $cr))) / $ar; + } + $r[$i] = $cr * 255; + } + + return new Less_Tree_Color($r, $ar); + } + + public function multiply($color1 = null, $color2 = null ){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to multiply must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to multiply must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendMultiply'), $color1, $color2 ); + } + + private function colorBlendMultiply($cb, $cs){ + return $cb * $cs; + } + + public function screen($color1 = null, $color2 = null ){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to screen must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to screen must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendScreen'), $color1, $color2 ); + } + + private function colorBlendScreen( $cb, $cs){ + return $cb + $cs - $cb * $cs; + } + + public function overlay($color1 = null, $color2 = null){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to overlay must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to overlay must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendOverlay'), $color1, $color2 ); + } + + private function colorBlendOverlay($cb, $cs ){ + $cb *= 2; + return ($cb <= 1) + ? $this->colorBlendMultiply($cb, $cs) + : $this->colorBlendScreen($cb - 1, $cs); + } + + public function softlight($color1 = null, $color2 = null){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to softlight must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to softlight must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendSoftlight'), $color1, $color2 ); + } + + private function colorBlendSoftlight($cb, $cs ){ + $d = 1; + $e = $cb; + if( $cs > 0.5 ){ + $e = 1; + $d = ($cb > 0.25) ? sqrt($cb) + : ((16 * $cb - 12) * $cb + 4) * $cb; + } + return $cb - (1 - 2 * $cs) * $e * ($d - $cb); + } + + public function hardlight($color1 = null, $color2 = null){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to hardlight must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to hardlight must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendHardlight'), $color1, $color2 ); + } + + private function colorBlendHardlight( $cb, $cs ){ + return $this->colorBlendOverlay($cs, $cb); + } + + public function difference($color1 = null, $color2 = null) { + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to difference must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to difference must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendDifference'), $color1, $color2 ); + } + + private function colorBlendDifference( $cb, $cs ){ + return abs($cb - $cs); + } + + public function exclusion( $color1 = null, $color2 = null ){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to exclusion must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to exclusion must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendExclusion'), $color1, $color2 ); + } + + private function colorBlendExclusion( $cb, $cs ){ + return $cb + $cs - 2 * $cb * $cs; + } + + public function average($color1 = null, $color2 = null){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to average must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to average must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendAverage'), $color1, $color2 ); + } + + // non-w3c functions: + public function colorBlendAverage($cb, $cs ){ + return ($cb + $cs) / 2; + } + + public function negation($color1 = null, $color2 = null ){ + if (!$color1 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The first argument to negation must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + if (!$color2 instanceof Less_Tree_Color) { + throw new Less_Exception_Compiler('The second argument to negation must be a color' . ($color instanceof Less_Tree_Expression ? ' (did you forgot commas?)' : '') ); + } + + return $this->colorBlend( array($this,'colorBlendNegation'), $color1, $color2 ); + } + + public function colorBlendNegation($cb, $cs){ + return 1 - abs($cb + $cs - 1); + } + + // ~ End of Color Blending + +} + + +/** + * Mime lookup + * + * @package Less + * @subpackage node + */ +class Less_Mime{ + + // this map is intentionally incomplete + // if you want more, install 'mime' dep + static $_types = array( + '.htm' => 'text/html', + '.html'=> 'text/html', + '.gif' => 'image/gif', + '.jpg' => 'image/jpeg', + '.jpeg'=> 'image/jpeg', + '.png' => 'image/png', + '.ttf' => 'application/x-font-ttf', + '.otf' => 'application/x-font-otf', + '.eot' => 'application/vnd.ms-fontobject', + '.woff' => 'application/x-font-woff', + '.svg' => 'image/svg+xml', + ); + + public static function lookup( $filepath ){ + $parts = explode('.',$filepath); + $ext = '.'.strtolower(array_pop($parts)); + + if( !isset(self::$_types[$ext]) ){ + return null; + } + return self::$_types[$ext]; + } + + public static function charsets_lookup( $type = null ){ + // assumes all text types are UTF-8 + return $type && preg_match('/^text\//',$type) ? 'UTF-8' : ''; + } +} + + +/** + * Tree + * + * @package Less + * @subpackage tree + */ +class Less_Tree{ + + public $cache_string; + + public function toCSS(){ + $output = new Less_Output(); + $this->genCSS($output); + return $output->toString(); + } + + + /** + * Generate CSS by adding it to the output object + * + * @param Less_Output $output The output + * @return void + */ + public function genCSS($output){} + + + /** + * @param Less_Tree_Ruleset[] $rules + */ + public static function outputRuleset( $output, $rules ){ + + $ruleCnt = count($rules); + Less_Environment::$tabLevel++; + + + // Compressed + if( Less_Parser::$options['compress'] ){ + $output->add('{'); + for( $i = 0; $i < $ruleCnt; $i++ ){ + $rules[$i]->genCSS( $output ); + } + + $output->add( '}' ); + Less_Environment::$tabLevel--; + return; + } + + + // Non-compressed + $tabSetStr = "\n".str_repeat( ' ' , Less_Environment::$tabLevel-1 ); + $tabRuleStr = $tabSetStr.' '; + + $output->add( " {" ); + for($i = 0; $i < $ruleCnt; $i++ ){ + $output->add( $tabRuleStr ); + $rules[$i]->genCSS( $output ); + } + Less_Environment::$tabLevel--; + $output->add( $tabSetStr.'}' ); + + } + + public function accept($visitor){} + + + public static function ReferencedArray($rules){ + foreach($rules as $rule){ + if( method_exists($rule, 'markReferenced') ){ + $rule->markReferenced(); + } + } + } + + + /** + * Requires php 5.3+ + */ + public static function __set_state($args){ + + $class = get_called_class(); + $obj = new $class(null,null,null,null); + foreach($args as $key => $val){ + $obj->$key = $val; + } + return $obj; + } + +} + +/** + * Parser output + * + * @package Less + * @subpackage output + */ +class Less_Output{ + + /** + * Output holder + * + * @var string + */ + protected $strs = array(); + + /** + * Adds a chunk to the stack + * + * @param string $chunk The chunk to output + * @param Less_FileInfo $fileInfo The file information + * @param integer $index The index + * @param mixed $mapLines + */ + public function add($chunk, $fileInfo = null, $index = 0, $mapLines = null){ + $this->strs[] = $chunk; + } + + /** + * Is the output empty? + * + * @return boolean + */ + public function isEmpty(){ + return count($this->strs) === 0; + } + + + /** + * Converts the output to string + * + * @return string + */ + public function toString(){ + return implode('',$this->strs); + } + +} + +/** + * Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor{ + + protected $methods = array(); + protected $_visitFnCache = array(); + + public function __construct(){ + $this->_visitFnCache = get_class_methods(get_class($this)); + $this->_visitFnCache = array_flip($this->_visitFnCache); + } + + public function visitObj( $node ){ + + $funcName = 'visit'.$node->type; + if( isset($this->_visitFnCache[$funcName]) ){ + + $visitDeeper = true; + $this->$funcName( $node, $visitDeeper ); + + if( $visitDeeper ){ + $node->accept($this); + } + + $funcName = $funcName . "Out"; + if( isset($this->_visitFnCache[$funcName]) ){ + $this->$funcName( $node ); + } + + }else{ + $node->accept($this); + } + + return $node; + } + + public function visitArray( $nodes ){ + + array_map( array($this,'visitObj'), $nodes); + return $nodes; + } +} + + + +/** + * Replacing Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_VisitorReplacing extends Less_Visitor{ + + public function visitObj( $node ){ + + $funcName = 'visit'.$node->type; + if( isset($this->_visitFnCache[$funcName]) ){ + + $visitDeeper = true; + $node = $this->$funcName( $node, $visitDeeper ); + + if( $node ){ + if( $visitDeeper && is_object($node) ){ + $node->accept($this); + } + + $funcName = $funcName . "Out"; + if( isset($this->_visitFnCache[$funcName]) ){ + $this->$funcName( $node ); + } + } + + }else{ + $node->accept($this); + } + + return $node; + } + + public function visitArray( $nodes ){ + + $newNodes = array(); + foreach($nodes as $node){ + $evald = $this->visitObj($node); + if( $evald ){ + if( is_array($evald) ){ + self::flatten($evald,$newNodes); + }else{ + $newNodes[] = $evald; + } + } + } + return $newNodes; + } + + public function flatten( $arr, &$out ){ + + foreach($arr as $item){ + if( !is_array($item) ){ + $out[] = $item; + continue; + } + + foreach($item as $nestedItem){ + if( is_array($nestedItem) ){ + self::flatten( $nestedItem, $out); + }else{ + $out[] = $nestedItem; + } + } + } + + return $out; + } + +} + + +
+
+/**
+ * Configurable
+ *
+ * @package Less
+ * @subpackage Core
+ */
+abstract class Less_Configurable {
+
+ /**
+ * Array of options
+ *
+ * @var array
+ */
+ protected $options = array();
+
+ /**
+ * Array of default options
+ *
+ * @var array
+ */
+ protected $defaultOptions = array();
+
+
+ /**
+ * Set options
+ *
+ * If $options is an object it will be converted into an array by called
+ * it's toArray method.
+ *
+ * @throws Exception
+ * @param array|object $options
+ *
+ */
+ public function setOptions($options){
+ $options = array_intersect_key($options,$this->defaultOptions);
+ $this->options = array_merge($this->defaultOptions, $this->options, $options);
+ }
+
+
+ /**
+ * Get an option value by name
+ *
+ * If the option is empty or not set a NULL value will be returned.
+ *
+ * @param string $name
+ * @param mixed $default Default value if confiuration of $name is not present
+ * @return mixed
+ */
+ public function getOption($name, $default = null){
+ if(isset($this->options[$name])){
+ return $this->options[$name];
+ }
+ return $default;
+ }
+
+
+ /**
+ * Set an option
+ *
+ * @param string $name
+ * @param mixed $value
+ */
+ public function setOption($name, $value){
+ $this->options[$name] = $value;
+ }
+
+} + +/** + * Alpha + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Alpha extends Less_Tree{ + public $value; + public $type = 'Alpha'; + + public function __construct($val){ + $this->value = $val; + } + + //function accept( $visitor ){ + // $this->value = $visitor->visit( $this->value ); + //} + + public function compile($env){ + + if( is_object($this->value) ){ + $this->value = $this->value->compile($env); + } + + return $this; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + + $output->add( "alpha(opacity=" ); + + if( is_string($this->value) ){ + $output->add( $this->value ); + }else{ + $this->value->genCSS( $output); + } + + $output->add( ')' ); + } + + public function toCSS(){ + return "alpha(opacity=" . (is_string($this->value) ? $this->value : $this->value->toCSS()) . ")"; + } + + +} + +/** + * Anonymous + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Anonymous extends Less_Tree{ + public $value; + public $quote; + public $index; + public $mapLines; + public $currentFileInfo; + public $type = 'Anonymous'; + + /** + * @param integer $index + * @param boolean $mapLines + */ + public function __construct($value, $index = null, $currentFileInfo = null, $mapLines = null ){ + $this->value = $value; + $this->index = $index; + $this->mapLines = $mapLines; + $this->currentFileInfo = $currentFileInfo; + } + + public function compile(){ + return new Less_Tree_Anonymous($this->value, $this->index, $this->currentFileInfo, $this->mapLines); + } + + public function compare($x){ + if( !is_object($x) ){ + return -1; + } + + $left = $this->toCSS(); + $right = $x->toCSS(); + + if( $left === $right ){ + return 0; + } + + return $left < $right ? -1 : 1; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( $this->value, $this->currentFileInfo, $this->index, $this->mapLines ); + } + + public function toCSS(){ + return $this->value; + } + +} + + +/** + * Assignment + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Assignment extends Less_Tree{ + + public $key; + public $value; + public $type = 'Assignment'; + + public function __construct($key, $val) { + $this->key = $key; + $this->value = $val; + } + + public function accept( $visitor ){ + $this->value = $visitor->visitObj( $this->value ); + } + + public function compile($env) { + return new Less_Tree_Assignment( $this->key, $this->value->compile($env)); + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( $this->key . '=' ); + $this->value->genCSS( $output ); + } + + public function toCss(){ + return $this->key . '=' . $this->value->toCSS(); + } +} + + +/** + * Attribute + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Attribute extends Less_Tree{ + + public $key; + public $op; + public $value; + public $type = 'Attribute'; + + public function __construct($key, $op, $value){ + $this->key = $key; + $this->op = $op; + $this->value = $value; + } + + public function compile($env){ + + $key_obj = is_object($this->key); + $val_obj = is_object($this->value); + + if( !$key_obj && !$val_obj ){ + return $this; + } + + return new Less_Tree_Attribute( + $key_obj ? $this->key->compile($env) : $this->key , + $this->op, + $val_obj ? $this->value->compile($env) : $this->value); + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( $this->toCSS() ); + } + + public function toCSS(){ + $value = $this->key; + + if( $this->op ){ + $value .= $this->op; + $value .= (is_object($this->value) ? $this->value->toCSS() : $this->value); + } + + return '[' . $value . ']'; + } +} + + +/** + * Call + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Call extends Less_Tree{ + public $value; + + protected $name; + protected $args; + protected $index; + protected $currentFileInfo; + public $type = 'Call'; + + public function __construct($name, $args, $index, $currentFileInfo = null ){ + $this->name = $name; + $this->args = $args; + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + } + + public function accept( $visitor ){ + $this->args = $visitor->visitArray( $this->args ); + } + + // + // When evaluating a function call, + // we either find the function in `tree.functions` [1], + // in which case we call it, passing the evaluated arguments, + // or we simply print it out as it appeared originally [2]. + // + // The *functions.js* file contains the built-in functions. + // + // The reason why we evaluate the arguments, is in the case where + // we try to pass a variable to a function, like: `saturate(@color)`. + // The function should receive the value, not the variable. + // + public function compile($env=null){ + $args = array(); + foreach($this->args as $a){ + $args[] = $a->compile($env); + } + + $nameLC = strtolower($this->name); + switch($nameLC){ + case '%': + $nameLC = '_percent'; + break; + + case 'get-unit': + $nameLC = 'getunit'; + break; + + case 'data-uri': + $nameLC = 'datauri'; + break; + + case 'svg-gradient': + $nameLC = 'svggradient'; + break; + } + + $result = null; + if( $nameLC === 'default' ){ + $result = Less_Tree_DefaultFunc::compile(); + + }else{ + + if( method_exists('Less_Functions',$nameLC) ){ // 1. + try { + + $func = new Less_Functions($env, $this->currentFileInfo); + $result = call_user_func_array( array($func,$nameLC),$args); + + } catch (Exception $e) { + throw new Less_Exception_Compiler('error evaluating function `' . $this->name . '` '.$e->getMessage().' index: '. $this->index); + } + } elseif( isset( $env->functions[$nameLC] ) && is_callable( $env->functions[$nameLC] ) ) { + try { + $result = call_user_func_array( $env->functions[$nameLC], $args ); + } catch (Exception $e) { + throw new Less_Exception_Compiler('error evaluating function `' . $this->name . '` '.$e->getMessage().' index: '. $this->index); + } + } + } + + if( $result !== null ){ + return $result; + } + + + return new Less_Tree_Call( $this->name, $args, $this->index, $this->currentFileInfo ); + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + + $output->add( $this->name . '(', $this->currentFileInfo, $this->index ); + $args_len = count($this->args); + for($i = 0; $i < $args_len; $i++ ){ + $this->args[$i]->genCSS( $output ); + if( $i + 1 < $args_len ){ + $output->add( ', ' ); + } + } + + $output->add( ')' ); + } + + + //public function toCSS(){ + // return $this->compile()->toCSS(); + //} + +} + + +/** + * Color + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Color extends Less_Tree{ + public $rgb; + public $alpha; + public $isTransparentKeyword; + public $type = 'Color'; + + public function __construct($rgb, $a = 1, $isTransparentKeyword = null ){ + + if( $isTransparentKeyword ){ + $this->rgb = $rgb; + $this->alpha = $a; + $this->isTransparentKeyword = true; + return; + } + + $this->rgb = array(); + if( is_array($rgb) ){ + $this->rgb = $rgb; + }else if( strlen($rgb) == 6 ){ + foreach(str_split($rgb, 2) as $c){ + $this->rgb[] = hexdec($c); + } + }else{ + foreach(str_split($rgb, 1) as $c){ + $this->rgb[] = hexdec($c.$c); + } + } + $this->alpha = is_numeric($a) ? $a : 1; + } + + public function compile(){ + return $this; + } + + public function luma(){ + $r = $this->rgb[0] / 255; + $g = $this->rgb[1] / 255; + $b = $this->rgb[2] / 255; + + $r = ($r <= 0.03928) ? $r / 12.92 : pow((($r + 0.055) / 1.055), 2.4); + $g = ($g <= 0.03928) ? $g / 12.92 : pow((($g + 0.055) / 1.055), 2.4); + $b = ($b <= 0.03928) ? $b / 12.92 : pow((($b + 0.055) / 1.055), 2.4); + + return 0.2126 * $r + 0.7152 * $g + 0.0722 * $b; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( $this->toCSS() ); + } + + public function toCSS( $doNotCompress = false ){ + $compress = Less_Parser::$options['compress'] && !$doNotCompress; + $alpha = Less_Functions::fround( $this->alpha ); + + + // + // If we have some transparency, the only way to represent it + // is via `rgba`. Otherwise, we use the hex representation, + // which has better compatibility with older browsers. + // Values are capped between `0` and `255`, rounded and zero-padded. + // + if( $alpha < 1 ){ + if( ( $alpha === 0 || $alpha === 0.0 ) && isset($this->isTransparentKeyword) && $this->isTransparentKeyword ){ + return 'transparent'; + } + + $values = array(); + foreach($this->rgb as $c){ + $values[] = Less_Functions::clamp( round($c), 255); + } + $values[] = $alpha; + + $glue = ($compress ? ',' : ', '); + return "rgba(" . implode($glue, $values) . ")"; + }else{ + + $color = $this->toRGB(); + + if( $compress ){ + + // Convert color to short format + if( $color[1] === $color[2] && $color[3] === $color[4] && $color[5] === $color[6]) { + $color = '#'.$color[1] . $color[3] . $color[5]; + } + } + + return $color; + } + } + + // + // Operations have to be done per-channel, if not, + // channels will spill onto each other. Once we have + // our result, in the form of an integer triplet, + // we create a new Color node to hold the result. + // + + /** + * @param string $op + */ + public function operate( $op, $other) { + $rgb = array(); + $alpha = $this->alpha * (1 - $other->alpha) + $other->alpha; + for ($c = 0; $c < 3; $c++) { + $rgb[$c] = Less_Functions::operate( $op, $this->rgb[$c], $other->rgb[$c]); + } + return new Less_Tree_Color($rgb, $alpha); + } + + public function toRGB(){ + return $this->toHex($this->rgb); + } + + public function toHSL(){ + $r = $this->rgb[0] / 255; + $g = $this->rgb[1] / 255; + $b = $this->rgb[2] / 255; + $a = $this->alpha; + + $max = max($r, $g, $b); + $min = min($r, $g, $b); + $l = ($max + $min) / 2; + $d = $max - $min; + + $h = $s = 0; + if( $max !== $min ){ + $s = $l > 0.5 ? $d / (2 - $max - $min) : $d / ($max + $min); + + switch ($max) { + case $r: $h = ($g - $b) / $d + ($g < $b ? 6 : 0); break; + case $g: $h = ($b - $r) / $d + 2; break; + case $b: $h = ($r - $g) / $d + 4; break; + } + $h /= 6; + } + return array('h' => $h * 360, 's' => $s, 'l' => $l, 'a' => $a ); + } + + //Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript + public function toHSV() { + $r = $this->rgb[0] / 255; + $g = $this->rgb[1] / 255; + $b = $this->rgb[2] / 255; + $a = $this->alpha; + + $max = max($r, $g, $b); + $min = min($r, $g, $b); + + $v = $max; + + $d = $max - $min; + if ($max === 0) { + $s = 0; + } else { + $s = $d / $max; + } + + $h = 0; + if( $max !== $min ){ + switch($max){ + case $r: $h = ($g - $b) / $d + ($g < $b ? 6 : 0); break; + case $g: $h = ($b - $r) / $d + 2; break; + case $b: $h = ($r - $g) / $d + 4; break; + } + $h /= 6; + } + return array('h'=> $h * 360, 's'=> $s, 'v'=> $v, 'a' => $a ); + } + + public function toARGB(){ + $argb = array_merge( (array) Less_Parser::round($this->alpha * 255), $this->rgb); + return $this->toHex( $argb ); + } + + public function compare($x){ + + if( !property_exists( $x, 'rgb' ) ){ + return -1; + } + + + return ($x->rgb[0] === $this->rgb[0] && + $x->rgb[1] === $this->rgb[1] && + $x->rgb[2] === $this->rgb[2] && + $x->alpha === $this->alpha) ? 0 : -1; + } + + public function toHex( $v ){ + + $ret = '#'; + foreach($v as $c){ + $c = Less_Functions::clamp( Less_Parser::round($c), 255); + if( $c < 16 ){ + $ret .= '0'; + } + $ret .= dechex($c); + } + + return $ret; + } + + + /** + * @param string $keyword + */ + public static function fromKeyword( $keyword ){ + $keyword = strtolower($keyword); + + if( Less_Colors::hasOwnProperty($keyword) ){ + // detect named color + return new Less_Tree_Color(substr(Less_Colors::color($keyword), 1)); + } + + if( $keyword === 'transparent' ){ + return new Less_Tree_Color( array(0, 0, 0), 0, true); + } + } + +} + + +/** + * Comment + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Comment extends Less_Tree{ + + public $value; + public $silent; + public $isReferenced; + public $currentFileInfo; + public $type = 'Comment'; + + public function __construct($value, $silent, $index = null, $currentFileInfo = null ){ + $this->value = $value; + $this->silent = !! $silent; + $this->currentFileInfo = $currentFileInfo; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + //if( $this->debugInfo ){ + //$output->add( tree.debugInfo($env, $this), $this->currentFileInfo, $this->index); + //} + $output->add( trim($this->value) );//TODO shouldn't need to trim, we shouldn't grab the \n + } + + public function toCSS(){ + return Less_Parser::$options['compress'] ? '' : $this->value; + } + + public function isSilent(){ + $isReference = ($this->currentFileInfo && isset($this->currentFileInfo['reference']) && (!isset($this->isReferenced) || !$this->isReferenced) ); + $isCompressed = Less_Parser::$options['compress'] && !preg_match('/^\/\*!/', $this->value); + return $this->silent || $isReference || $isCompressed; + } + + public function compile(){ + return $this; + } + + public function markReferenced(){ + $this->isReferenced = true; + } + +} + + +/** + * Condition + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Condition extends Less_Tree{ + + public $op; + public $lvalue; + public $rvalue; + public $index; + public $negate; + public $type = 'Condition'; + + public function __construct($op, $l, $r, $i = 0, $negate = false) { + $this->op = trim($op); + $this->lvalue = $l; + $this->rvalue = $r; + $this->index = $i; + $this->negate = $negate; + } + + public function accept($visitor){ + $this->lvalue = $visitor->visitObj( $this->lvalue ); + $this->rvalue = $visitor->visitObj( $this->rvalue ); + } + + public function compile($env) { + $a = $this->lvalue->compile($env); + $b = $this->rvalue->compile($env); + + switch( $this->op ){ + case 'and': + $result = $a && $b; + break; + + case 'or': + $result = $a || $b; + break; + + default: + if( Less_Parser::is_method($a, 'compare') ){ + $result = $a->compare($b); + }elseif( Less_Parser::is_method($b, 'compare') ){ + $result = $b->compare($a); + }else{ + throw new Less_Exception_Compiler('Unable to perform comparison', null, $this->index); + } + + switch ($result) { + case -1: + $result = $this->op === '<' || $this->op === '=<' || $this->op === '<='; + break; + + case 0: + $result = $this->op === '=' || $this->op === '>=' || $this->op === '=<' || $this->op === '<='; + break; + + case 1: + $result = $this->op === '>' || $this->op === '>='; + break; + } + break; + } + + return $this->negate ? !$result : $result; + } + +} + + +/** + * DefaultFunc + * + * @package Less + * @subpackage tree + */ +class Less_Tree_DefaultFunc{ + + static $error_; + static $value_; + + public static function compile(){ + if( self::$error_ ){ + throw new Exception(self::$error_); + } + if( self::$value_ !== null ){ + return self::$value_ ? new Less_Tree_Keyword('true') : new Less_Tree_Keyword('false'); + } + } + + public static function value( $v ){ + self::$value_ = $v; + } + + public static function error( $e ){ + self::$error_ = $e; + } + + public static function reset(){ + self::$value_ = self::$error_ = null; + } +} + +/** + * DetachedRuleset + * + * @package Less + * @subpackage tree + */ +class Less_Tree_DetachedRuleset extends Less_Tree{ + + public $ruleset; + public $frames; + public $type = 'DetachedRuleset'; + + public function __construct( $ruleset, $frames = null ){ + $this->ruleset = $ruleset; + $this->frames = $frames; + } + + public function accept($visitor) { + $this->ruleset = $visitor->visitObj($this->ruleset); + } + + public function compile($env){ + if( $this->frames ){ + $frames = $this->frames; + }else{ + $frames = $env->frames; + } + return new Less_Tree_DetachedRuleset($this->ruleset, $frames); + } + + public function callEval($env) { + if( $this->frames ){ + return $this->ruleset->compile( $env->copyEvalEnv( array_merge($this->frames,$env->frames) ) ); + } + return $this->ruleset->compile( $env ); + } +} + + + +/** + * Dimension + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Dimension extends Less_Tree{ + + public $value; + public $unit; + public $type = 'Dimension'; + + public function __construct($value, $unit = null){ + $this->value = floatval($value); + + if( $unit && ($unit instanceof Less_Tree_Unit) ){ + $this->unit = $unit; + }elseif( $unit ){ + $this->unit = new Less_Tree_Unit( array($unit) ); + }else{ + $this->unit = new Less_Tree_Unit( ); + } + } + + public function accept( $visitor ){ + $this->unit = $visitor->visitObj( $this->unit ); + } + + public function compile(){ + return $this; + } + + public function toColor() { + return new Less_Tree_Color(array($this->value, $this->value, $this->value)); + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + + if( Less_Parser::$options['strictUnits'] && !$this->unit->isSingular() ){ + throw new Less_Exception_Compiler("Multiple units in dimension. Correct the units or use the unit function. Bad unit: ".$this->unit->toString()); + } + + $value = Less_Functions::fround( $this->value ); + $strValue = (string)$value; + + if( $value !== 0 && $value < 0.000001 && $value > -0.000001 ){ + // would be output 1e-6 etc. + $strValue = number_format($strValue,10); + $strValue = preg_replace('/\.?0+$/','', $strValue); + } + + if( Less_Parser::$options['compress'] ){ + // Zero values doesn't need a unit + if( $value === 0 && $this->unit->isLength() ){ + $output->add( $strValue ); + return $strValue; + } + + // Float values doesn't need a leading zero + if( $value > 0 && $value < 1 && $strValue[0] === '0' ){ + $strValue = substr($strValue,1); + } + } + + $output->add( $strValue ); + $this->unit->genCSS( $output ); + } + + public function __toString(){ + return $this->toCSS(); + } + + // In an operation between two Dimensions, + // we default to the first Dimension's unit, + // so `1px + 2em` will yield `3px`. + + /** + * @param string $op + */ + public function operate( $op, $other){ + + $value = Less_Functions::operate( $op, $this->value, $other->value); + $unit = clone $this->unit; + + if( $op === '+' || $op === '-' ){ + + if( !$unit->numerator && !$unit->denominator ){ + $unit->numerator = $other->unit->numerator; + $unit->denominator = $other->unit->denominator; + }elseif( !$other->unit->numerator && !$other->unit->denominator ){ + // do nothing + }else{ + $other = $other->convertTo( $this->unit->usedUnits()); + + if( Less_Parser::$options['strictUnits'] && $other->unit->toString() !== $unit->toCSS() ){ + throw new Less_Exception_Compiler("Incompatible units. Change the units or use the unit function. Bad units: '".$unit->toString() . "' and ".$other->unit->toString()+"'."); + } + + $value = Less_Functions::operate( $op, $this->value, $other->value); + } + }elseif( $op === '*' ){ + $unit->numerator = array_merge($unit->numerator, $other->unit->numerator); + $unit->denominator = array_merge($unit->denominator, $other->unit->denominator); + sort($unit->numerator); + sort($unit->denominator); + $unit->cancel(); + }elseif( $op === '/' ){ + $unit->numerator = array_merge($unit->numerator, $other->unit->denominator); + $unit->denominator = array_merge($unit->denominator, $other->unit->numerator); + sort($unit->numerator); + sort($unit->denominator); + $unit->cancel(); + } + return new Less_Tree_Dimension( $value, $unit); + } + + public function compare($other) { + if ($other instanceof Less_Tree_Dimension) { + + if( $this->unit->isEmpty() || $other->unit->isEmpty() ){ + $a = $this; + $b = $other; + } else { + $a = $this->unify(); + $b = $other->unify(); + if( $a->unit->compare($b->unit) !== 0 ){ + return -1; + } + } + $aValue = $a->value; + $bValue = $b->value; + + if ($bValue > $aValue) { + return -1; + } elseif ($bValue < $aValue) { + return 1; + } else { + return 0; + } + } else { + return -1; + } + } + + public function unify() { + return $this->convertTo(array('length'=> 'px', 'duration'=> 's', 'angle' => 'rad' )); + } + + public function convertTo($conversions) { + $value = $this->value; + $unit = clone $this->unit; + + if( is_string($conversions) ){ + $derivedConversions = array(); + foreach( Less_Tree_UnitConversions::$groups as $i ){ + if( isset(Less_Tree_UnitConversions::${$i}[$conversions]) ){ + $derivedConversions = array( $i => $conversions); + } + } + $conversions = $derivedConversions; + } + + + foreach($conversions as $groupName => $targetUnit){ + $group = Less_Tree_UnitConversions::${$groupName}; + + //numerator + foreach($unit->numerator as $i => $atomicUnit){ + $atomicUnit = $unit->numerator[$i]; + if( !isset($group[$atomicUnit]) ){ + continue; + } + + $value = $value * ($group[$atomicUnit] / $group[$targetUnit]); + + $unit->numerator[$i] = $targetUnit; + } + + //denominator + foreach($unit->denominator as $i => $atomicUnit){ + $atomicUnit = $unit->denominator[$i]; + if( !isset($group[$atomicUnit]) ){ + continue; + } + + $value = $value / ($group[$atomicUnit] / $group[$targetUnit]); + + $unit->denominator[$i] = $targetUnit; + } + } + + $unit->cancel(); + + return new Less_Tree_Dimension( $value, $unit); + } +} + + +/** + * Directive + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Directive extends Less_Tree{ + + public $name; + public $value; + public $rules; + public $index; + public $isReferenced; + public $currentFileInfo; + public $debugInfo; + public $type = 'Directive'; + + public function __construct($name, $value = null, $rules, $index = null, $currentFileInfo = null, $debugInfo = null ){ + $this->name = $name; + $this->value = $value; + if( $rules ){ + $this->rules = $rules; + $this->rules->allowImports = true; + } + + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + $this->debugInfo = $debugInfo; + } + + + public function accept( $visitor ){ + if( $this->rules ){ + $this->rules = $visitor->visitObj( $this->rules ); + } + if( $this->value ){ + $this->value = $visitor->visitObj( $this->value ); + } + } + + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $value = $this->value; + $rules = $this->rules; + $output->add( $this->name, $this->currentFileInfo, $this->index ); + if( $this->value ){ + $output->add(' '); + $this->value->genCSS($output); + } + if( $this->rules ){ + Less_Tree::outputRuleset( $output, array($this->rules)); + } else { + $output->add(';'); + } + } + + public function compile($env){ + + $value = $this->value; + $rules = $this->rules; + if( $value ){ + $value = $value->compile($env); + } + + if( $rules ){ + $rules = $rules->compile($env); + $rules->root = true; + } + + return new Less_Tree_Directive( $this->name, $value, $rules, $this->index, $this->currentFileInfo, $this->debugInfo ); + } + + + public function variable($name){ + if( $this->rules ){ + return $this->rules->variable($name); + } + } + + public function find($selector){ + if( $this->rules ){ + return $this->rules->find($selector, $this); + } + } + + //rulesets: function () { if (this.rules) return tree.Ruleset.prototype.rulesets.apply(this.rules); }, + + public function markReferenced(){ + $this->isReferenced = true; + if( $this->rules ){ + Less_Tree::ReferencedArray($this->rules->rules); + } + } + +} + + +/** + * Element + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Element extends Less_Tree{ + + public $combinator = ''; + public $value = ''; + public $index; + public $currentFileInfo; + public $type = 'Element'; + + public $value_is_object = false; + + public function __construct($combinator, $value, $index = null, $currentFileInfo = null ){ + + $this->value = $value; + $this->value_is_object = is_object($value); + + if( $combinator ){ + $this->combinator = $combinator; + } + + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + } + + public function accept( $visitor ){ + if( $this->value_is_object ){ //object or string + $this->value = $visitor->visitObj( $this->value ); + } + } + + public function compile($env){ + + if( Less_Environment::$mixin_stack ){ + return new Less_Tree_Element($this->combinator, ($this->value_is_object ? $this->value->compile($env) : $this->value), $this->index, $this->currentFileInfo ); + } + + if( $this->value_is_object ){ + $this->value = $this->value->compile($env); + } + + return $this; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( $this->toCSS(), $this->currentFileInfo, $this->index ); + } + + public function toCSS(){ + + if( $this->value_is_object ){ + $value = $this->value->toCSS(); + }else{ + $value = $this->value; + } + + + if( $value === '' && $this->combinator && $this->combinator === '&' ){ + return ''; + } + + + return Less_Environment::$_outputMap[$this->combinator] . $value; + } + +} + + +/** + * Expression + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Expression extends Less_Tree{ + + public $value = array(); + public $parens = false; + public $parensInOp = false; + public $type = 'Expression'; + + public function __construct( $value, $parens = null ){ + $this->value = $value; + $this->parens = $parens; + } + + public function accept( $visitor ){ + $this->value = $visitor->visitArray( $this->value ); + } + + public function compile($env) { + + $doubleParen = false; + + if( $this->parens && !$this->parensInOp ){ + Less_Environment::$parensStack++; + } + + $returnValue = null; + if( $this->value ){ + + $count = count($this->value); + + if( $count > 1 ){ + + $ret = array(); + foreach($this->value as $e){ + $ret[] = $e->compile($env); + } + $returnValue = new Less_Tree_Expression($ret); + + }else{ + + if( ($this->value[0] instanceof Less_Tree_Expression) && $this->value[0]->parens && !$this->value[0]->parensInOp ){ + $doubleParen = true; + } + + $returnValue = $this->value[0]->compile($env); + } + + } else { + $returnValue = $this; + } + + if( $this->parens ){ + if( !$this->parensInOp ){ + Less_Environment::$parensStack--; + + }elseif( !Less_Environment::isMathOn() && !$doubleParen ){ + $returnValue = new Less_Tree_Paren($returnValue); + + } + } + return $returnValue; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $val_len = count($this->value); + for( $i = 0; $i < $val_len; $i++ ){ + $this->value[$i]->genCSS( $output ); + if( $i + 1 < $val_len ){ + $output->add( ' ' ); + } + } + } + + public function throwAwayComments() { + + if( is_array($this->value) ){ + $new_value = array(); + foreach($this->value as $v){ + if( $v instanceof Less_Tree_Comment ){ + continue; + } + $new_value[] = $v; + } + $this->value = $new_value; + } + } +} + + +/** + * Extend + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Extend extends Less_Tree{ + + public $selector; + public $option; + public $index; + public $selfSelectors = array(); + public $allowBefore; + public $allowAfter; + public $firstExtendOnThisSelectorPath; + public $type = 'Extend'; + public $ruleset; + + + public $object_id; + public $parent_ids = array(); + + /** + * @param integer $index + */ + public function __construct($selector, $option, $index){ + static $i = 0; + $this->selector = $selector; + $this->option = $option; + $this->index = $index; + + switch($option){ + case "all": + $this->allowBefore = true; + $this->allowAfter = true; + break; + default: + $this->allowBefore = false; + $this->allowAfter = false; + break; + } + + $this->object_id = $i++; + $this->parent_ids = array($this->object_id); + } + + public function accept( $visitor ){ + $this->selector = $visitor->visitObj( $this->selector ); + } + + public function compile( $env ){ + Less_Parser::$has_extends = true; + $this->selector = $this->selector->compile($env); + return $this; + //return new Less_Tree_Extend( $this->selector->compile($env), $this->option, $this->index); + } + + public function findSelfSelectors( $selectors ){ + $selfElements = array(); + + + for( $i = 0, $selectors_len = count($selectors); $i < $selectors_len; $i++ ){ + $selectorElements = $selectors[$i]->elements; + // duplicate the logic in genCSS function inside the selector node. + // future TODO - move both logics into the selector joiner visitor + if( $i && $selectorElements && $selectorElements[0]->combinator === "") { + $selectorElements[0]->combinator = ' '; + } + $selfElements = array_merge( $selfElements, $selectors[$i]->elements ); + } + + $this->selfSelectors = array(new Less_Tree_Selector($selfElements)); + } + +} + +/** + * CSS @import node + * + * The general strategy here is that we don't want to wait + * for the parsing to be completed, before we start importing + * the file. That's because in the context of a browser, + * most of the time will be spent waiting for the server to respond. + * + * On creation, we push the import path to our import queue, though + * `import,push`, we also pass it a callback, which it'll call once + * the file has been fetched, and parsed. + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Import extends Less_Tree{ + + public $options; + public $index; + public $path; + public $features; + public $currentFileInfo; + public $css; + public $skip; + public $root; + public $type = 'Import'; + + public function __construct($path, $features, $options, $index, $currentFileInfo = null ){ + $this->options = $options; + $this->index = $index; + $this->path = $path; + $this->features = $features; + $this->currentFileInfo = $currentFileInfo; + + if( is_array($options) ){ + $this->options += array('inline'=>false); + + if( isset($this->options['less']) || $this->options['inline'] ){ + $this->css = !isset($this->options['less']) || !$this->options['less'] || $this->options['inline']; + } else { + $pathValue = $this->getPath(); + if( $pathValue && preg_match('/css([\?;].*)?$/',$pathValue) ){ + $this->css = true; + } + } + } + } + +// +// The actual import node doesn't return anything, when converted to CSS. +// The reason is that it's used at the evaluation stage, so that the rules +// it imports can be treated like any other rules. +// +// In `eval`, we make sure all Import nodes get evaluated, recursively, so +// we end up with a flat structure, which can easily be imported in the parent +// ruleset. +// + + public function accept($visitor){ + + if( $this->features ){ + $this->features = $visitor->visitObj($this->features); + } + $this->path = $visitor->visitObj($this->path); + + if( !$this->options['inline'] && $this->root ){ + $this->root = $visitor->visit($this->root); + } + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + if( $this->css ){ + + $output->add( '@import ', $this->currentFileInfo, $this->index ); + + $this->path->genCSS( $output ); + if( $this->features ){ + $output->add( ' ' ); + $this->features->genCSS( $output ); + } + $output->add( ';' ); + } + } + + public function toCSS(){ + $features = $this->features ? ' ' . $this->features->toCSS() : ''; + + if ($this->css) { + return "@import " . $this->path->toCSS() . $features . ";\n"; + } else { + return ""; + } + } + + /** + * @return string + */ + public function getPath(){ + if ($this->path instanceof Less_Tree_Quoted) { + $path = $this->path->value; + $path = ( isset($this->css) || preg_match('/(\.[a-z]*$)|([\?;].*)$/',$path)) ? $path : $path . '.less'; + } else if ($this->path instanceof Less_Tree_URL) { + $path = $this->path->value->value; + }else{ + return null; + } + + //remove query string and fragment + return preg_replace('/[\?#][^\?]*$/','',$path); + } + + public function compileForImport( $env ){ + return new Less_Tree_Import( $this->path->compile($env), $this->features, $this->options, $this->index, $this->currentFileInfo); + } + + public function compilePath($env) { + $path = $this->path->compile($env); + $rootpath = ''; + if( $this->currentFileInfo && $this->currentFileInfo['rootpath'] ){ + $rootpath = $this->currentFileInfo['rootpath']; + } + + + if( !($path instanceof Less_Tree_URL) ){ + if( $rootpath ){ + $pathValue = $path->value; + // Add the base path if the import is relative + if( $pathValue && Less_Environment::isPathRelative($pathValue) ){ + $path->value = $this->currentFileInfo['uri_root'].$pathValue; + } + } + $path->value = Less_Environment::normalizePath($path->value); + } + + + + return $path; + } + + public function compile( $env ){ + + $evald = $this->compileForImport($env); + + //get path & uri + $path_and_uri = null; + if( is_callable(Less_Parser::$options['import_callback']) ){ + $path_and_uri = call_user_func(Less_Parser::$options['import_callback'],$evald); + } + + if( !$path_and_uri ){ + $path_and_uri = $evald->PathAndUri(); + } + + if( $path_and_uri ){ + list($full_path, $uri) = $path_and_uri; + }else{ + $full_path = $uri = $evald->getPath(); + } + + + //import once + if( $evald->skip( $full_path, $env) ){ + return array(); + } + + if( $this->options['inline'] ){ + //todo needs to reference css file not import + //$contents = new Less_Tree_Anonymous($this->root, 0, array('filename'=>$this->importedFilename), true ); + + Less_Parser::AddParsedFile($full_path); + $contents = new Less_Tree_Anonymous( file_get_contents($full_path), 0, array(), true ); + + if( $this->features ){ + return new Less_Tree_Media( array($contents), $this->features->value ); + } + + return array( $contents ); + } + + + // css ? + if( $evald->css ){ + $features = ( $evald->features ? $evald->features->compile($env) : null ); + return new Less_Tree_Import( $this->compilePath( $env), $features, $this->options, $this->index); + } + + + return $this->ParseImport( $full_path, $uri, $env ); + } + + + /** + * Using the import directories, get the full absolute path and uri of the import + * + * @param Less_Tree_Import $evald + */ + public function PathAndUri(){ + + $evald_path = $this->getPath(); + + if( $evald_path ){ + + $import_dirs = array(); + + if( Less_Environment::isPathRelative($evald_path) ){ + //if the path is relative, the file should be in the current directory + $import_dirs[ $this->currentFileInfo['currentDirectory'] ] = $this->currentFileInfo['uri_root']; + + }else{ + //otherwise, the file should be relative to the server root + $import_dirs[ $this->currentFileInfo['entryPath'] ] = $this->currentFileInfo['entryUri']; + + //if the user supplied entryPath isn't the actual root + $import_dirs[ $_SERVER['DOCUMENT_ROOT'] ] = ''; + + } + + // always look in user supplied import directories + $import_dirs = array_merge( $import_dirs, Less_Parser::$options['import_dirs'] ); + + + foreach( $import_dirs as $rootpath => $rooturi){ + if( is_callable($rooturi) ){ + list($path, $uri) = call_user_func($rooturi, $evald_path); + if( is_string($path) ){ + $full_path = $path; + return array( $full_path, $uri ); + } + }elseif( !empty($rootpath) ){ + + + if( $rooturi ){ + if( strpos($evald_path,$rooturi) === 0 ){ + $evald_path = substr( $evald_path, strlen($rooturi) ); + } + } + + $path = rtrim($rootpath,'/\\').'/'.ltrim($evald_path,'/\\'); + + if( file_exists($path) ){ + $full_path = Less_Environment::normalizePath($path); + $uri = Less_Environment::normalizePath(dirname($rooturi.$evald_path)); + return array( $full_path, $uri ); + } elseif( file_exists($path.'.less') ){ + $full_path = Less_Environment::normalizePath($path.'.less'); + $uri = Less_Environment::normalizePath(dirname($rooturi.$evald_path.'.less')); + return array( $full_path, $uri ); + } + } + } + } + } + + + /** + * Parse the import url and return the rules + * + * @return Less_Tree_Media|array + */ + public function ParseImport( $full_path, $uri, $env ){ + + $import_env = clone $env; + if( (isset($this->options['reference']) && $this->options['reference']) || isset($this->currentFileInfo['reference']) ){ + $import_env->currentFileInfo['reference'] = true; + } + + if( (isset($this->options['multiple']) && $this->options['multiple']) ){ + $import_env->importMultiple = true; + } + + $parser = new Less_Parser($import_env); + $root = $parser->parseFile($full_path, $uri, true); + + + $ruleset = new Less_Tree_Ruleset(array(), $root->rules ); + $ruleset->evalImports($import_env); + + return $this->features ? new Less_Tree_Media($ruleset->rules, $this->features->value) : $ruleset->rules; + } + + + /** + * Should the import be skipped? + * + * @return boolean|null + */ + private function Skip($path, $env){ + + $path = Less_Parser::winPath(realpath($path)); + + if( $path && Less_Parser::FileParsed($path) ){ + + if( isset($this->currentFileInfo['reference']) ){ + return true; + } + + return !isset($this->options['multiple']) && !$env->importMultiple; + } + + } +} + + + +/** + * Javascript + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Javascript extends Less_Tree{ + + public $type = 'Javascript'; + public $escaped; + public $expression; + public $index; + + /** + * @param boolean $index + * @param boolean $escaped + */ + public function __construct($string, $index, $escaped){ + $this->escaped = $escaped; + $this->expression = $string; + $this->index = $index; + } + + public function compile(){ + return new Less_Tree_Anonymous('/* Sorry, can not do JavaScript evaluation in PHP... :( */'); + } + +} + + +/** + * Keyword + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Keyword extends Less_Tree{ + + public $value; + public $type = 'Keyword'; + + /** + * @param string $value + */ + public function __construct($value){ + $this->value = $value; + } + + public function compile(){ + return $this; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + + if( $this->value === '%') { + throw new Less_Exception_Compiler("Invalid % without number"); + } + + $output->add( $this->value ); + } + + public function compare($other) { + if ($other instanceof Less_Tree_Keyword) { + return $other->value === $this->value ? 0 : 1; + } else { + return -1; + } + } +} + + +/** + * Media + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Media extends Less_Tree{ + + public $features; + public $rules; + public $index; + public $currentFileInfo; + public $isReferenced; + public $type = 'Media'; + + public function __construct($value = array(), $features = array(), $index = null, $currentFileInfo = null ){ + + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + + $selectors = $this->emptySelectors(); + + $this->features = new Less_Tree_Value($features); + + $this->rules = array(new Less_Tree_Ruleset($selectors, $value)); + $this->rules[0]->allowImports = true; + } + + public function accept( $visitor ){ + $this->features = $visitor->visitObj($this->features); + $this->rules = $visitor->visitArray($this->rules); + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + + $output->add( '@media ', $this->currentFileInfo, $this->index ); + $this->features->genCSS( $output ); + Less_Tree::outputRuleset( $output, $this->rules); + + } + + public function compile($env) { + + $media = new Less_Tree_Media(array(), array(), $this->index, $this->currentFileInfo ); + + $strictMathBypass = false; + if( Less_Parser::$options['strictMath'] === false) { + $strictMathBypass = true; + Less_Parser::$options['strictMath'] = true; + } + + $media->features = $this->features->compile($env); + + if( $strictMathBypass ){ + Less_Parser::$options['strictMath'] = false; + } + + $env->mediaPath[] = $media; + $env->mediaBlocks[] = $media; + + array_unshift($env->frames, $this->rules[0]); + $media->rules = array($this->rules[0]->compile($env)); + array_shift($env->frames); + + array_pop($env->mediaPath); + + return !$env->mediaPath ? $media->compileTop($env) : $media->compileNested($env); + } + + public function variable($name) { + return $this->rules[0]->variable($name); + } + + public function find($selector) { + return $this->rules[0]->find($selector, $this); + } + + public function emptySelectors(){ + $el = new Less_Tree_Element('','&', $this->index, $this->currentFileInfo ); + $sels = array( new Less_Tree_Selector(array($el), array(), null, $this->index, $this->currentFileInfo) ); + $sels[0]->mediaEmpty = true; + return $sels; + } + + public function markReferenced(){ + $this->rules[0]->markReferenced(); + $this->isReferenced = true; + Less_Tree::ReferencedArray($this->rules[0]->rules); + } + + // evaltop + public function compileTop($env) { + $result = $this; + + if (count($env->mediaBlocks) > 1) { + $selectors = $this->emptySelectors(); + $result = new Less_Tree_Ruleset($selectors, $env->mediaBlocks); + $result->multiMedia = true; + } + + $env->mediaBlocks = array(); + $env->mediaPath = array(); + + return $result; + } + + public function compileNested($env) { + $path = array_merge($env->mediaPath, array($this)); + + // Extract the media-query conditions separated with `,` (OR). + foreach ($path as $key => $p) { + $value = $p->features instanceof Less_Tree_Value ? $p->features->value : $p->features; + $path[$key] = is_array($value) ? $value : array($value); + } + + // Trace all permutations to generate the resulting media-query. + // + // (a, b and c) with nested (d, e) -> + // a and d + // a and e + // b and c and d + // b and c and e + + $permuted = $this->permute($path); + $expressions = array(); + foreach($permuted as $path){ + + for( $i=0, $len=count($path); $i < $len; $i++){ + $path[$i] = Less_Parser::is_method($path[$i], 'toCSS') ? $path[$i] : new Less_Tree_Anonymous($path[$i]); + } + + for( $i = count($path) - 1; $i > 0; $i-- ){ + array_splice($path, $i, 0, array(new Less_Tree_Anonymous('and'))); + } + + $expressions[] = new Less_Tree_Expression($path); + } + $this->features = new Less_Tree_Value($expressions); + + + + // Fake a tree-node that doesn't output anything. + return new Less_Tree_Ruleset(array(), array()); + } + + public function permute($arr) { + if (!$arr) + return array(); + + if (count($arr) == 1) + return $arr[0]; + + $result = array(); + $rest = $this->permute(array_slice($arr, 1)); + foreach ($rest as $r) { + foreach ($arr[0] as $a) { + $result[] = array_merge( + is_array($a) ? $a : array($a), + is_array($r) ? $r : array($r) + ); + } + } + + return $result; + } + + public function bubbleSelectors($selectors) { + + if( !$selectors) return; + + $this->rules = array(new Less_Tree_Ruleset( $selectors, array($this->rules[0]))); + } + +} + + +/** + * A simple css name-value pair + * ex: width:100px; + * + * In bootstrap, there are about 600-1,000 simple name-value pairs (depending on how forgiving the match is) -vs- 6,020 dynamic rules (Less_Tree_Rule) + * Using the name-value object can speed up bootstrap compilation slightly, but it breaks color keyword interpretation: color:red -> color:#FF0000; + * + * @package Less + * @subpackage tree + */ +class Less_Tree_NameValue extends Less_Tree{ + + public $name; + public $value; + public $index; + public $currentFileInfo; + public $type = 'NameValue'; + + public function __construct($name, $value = null, $index = null, $currentFileInfo = null ){ + $this->name = $name; + $this->value = $value; + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + } + + public function genCSS( $output ){ + + $output->add( + $this->name + . Less_Environment::$_outputMap[': '] + . $this->value + . (((Less_Environment::$lastRule && Less_Parser::$options['compress'])) ? "" : ";") + , $this->currentFileInfo, $this->index); + } + + public function compile ($env){ + return $this; + } +} + + +/** + * Negative + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Negative extends Less_Tree{ + + public $value; + public $type = 'Negative'; + + public function __construct($node){ + $this->value = $node; + } + + //function accept($visitor) { + // $this->value = $visitor->visit($this->value); + //} + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( '-' ); + $this->value->genCSS( $output ); + } + + public function compile($env) { + if( Less_Environment::isMathOn() ){ + $ret = new Less_Tree_Operation('*', array( new Less_Tree_Dimension(-1), $this->value ) ); + return $ret->compile($env); + } + return new Less_Tree_Negative( $this->value->compile($env) ); + } +} + +/** + * Operation + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Operation extends Less_Tree{ + + public $op; + public $operands; + public $isSpaced; + public $type = 'Operation'; + + /** + * @param string $op + */ + public function __construct($op, $operands, $isSpaced = false){ + $this->op = trim($op); + $this->operands = $operands; + $this->isSpaced = $isSpaced; + } + + public function accept($visitor) { + $this->operands = $visitor->visitArray($this->operands); + } + + public function compile($env){ + $a = $this->operands[0]->compile($env); + $b = $this->operands[1]->compile($env); + + + if( Less_Environment::isMathOn() ){ + + if( $a instanceof Less_Tree_Dimension && $b instanceof Less_Tree_Color ){ + $a = $a->toColor(); + + }elseif( $b instanceof Less_Tree_Dimension && $a instanceof Less_Tree_Color ){ + $b = $b->toColor(); + + } + + if( !method_exists($a,'operate') ){ + throw new Less_Exception_Compiler("Operation on an invalid type"); + } + + return $a->operate( $this->op, $b); + } + + return new Less_Tree_Operation($this->op, array($a, $b), $this->isSpaced ); + } + + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $this->operands[0]->genCSS( $output ); + if( $this->isSpaced ){ + $output->add( " " ); + } + $output->add( $this->op ); + if( $this->isSpaced ){ + $output->add( ' ' ); + } + $this->operands[1]->genCSS( $output ); + } + +} + + +/** + * Paren + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Paren extends Less_Tree{ + + public $value; + public $type = 'Paren'; + + public function __construct($value) { + $this->value = $value; + } + + public function accept($visitor){ + $this->value = $visitor->visitObj($this->value); + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( '(' ); + $this->value->genCSS( $output ); + $output->add( ')' ); + } + + public function compile($env) { + return new Less_Tree_Paren($this->value->compile($env)); + } + +} + + +/** + * Quoted + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Quoted extends Less_Tree{ + public $escaped; + public $value; + public $quote; + public $index; + public $currentFileInfo; + public $type = 'Quoted'; + + /** + * @param string $str + */ + public function __construct($str, $content = '', $escaped = false, $index = false, $currentFileInfo = null ){ + $this->escaped = $escaped; + $this->value = $content; + if( $str ){ + $this->quote = $str[0]; + } + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + if( !$this->escaped ){ + $output->add( $this->quote, $this->currentFileInfo, $this->index ); + } + $output->add( $this->value ); + if( !$this->escaped ){ + $output->add( $this->quote ); + } + } + + public function compile($env){ + + $value = $this->value; + if( preg_match_all('/`([^`]+)`/', $this->value, $matches) ){ + foreach($matches as $i => $match){ + $js = new Less_Tree_JavaScript($matches[1], $this->index, true); + $js = $js->compile()->value; + $value = str_replace($matches[0][$i], $js, $value); + } + } + + if( preg_match_all('/@\{([\w-]+)\}/',$value,$matches) ){ + foreach($matches[1] as $i => $match){ + $v = new Less_Tree_Variable('@' . $match, $this->index, $this->currentFileInfo ); + $v = $v->compile($env); + $v = ($v instanceof Less_Tree_Quoted) ? $v->value : $v->toCSS(); + $value = str_replace($matches[0][$i], $v, $value); + } + } + + return new Less_Tree_Quoted($this->quote . $value . $this->quote, $value, $this->escaped, $this->index, $this->currentFileInfo); + } + + public function compare($x) { + + if( !Less_Parser::is_method($x, 'toCSS') ){ + return -1; + } + + $left = $this->toCSS(); + $right = $x->toCSS(); + + if ($left === $right) { + return 0; + } + + return $left < $right ? -1 : 1; + } +} + + +/** + * Rule + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Rule extends Less_Tree{ + + public $name; + public $value; + public $important; + public $merge; + public $index; + public $inline; + public $variable; + public $currentFileInfo; + public $type = 'Rule'; + + /** + * @param string $important + */ + public function __construct($name, $value = null, $important = null, $merge = null, $index = null, $currentFileInfo = null, $inline = false){ + $this->name = $name; + $this->value = ($value instanceof Less_Tree_Value || $value instanceof Less_Tree_Ruleset) ? $value : new Less_Tree_Value(array($value)); + $this->important = $important ? ' ' . trim($important) : ''; + $this->merge = $merge; + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + $this->inline = $inline; + $this->variable = ( is_string($name) && $name[0] === '@'); + } + + public function accept($visitor) { + $this->value = $visitor->visitObj( $this->value ); + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + + $output->add( $this->name . Less_Environment::$_outputMap[': '], $this->currentFileInfo, $this->index); + try{ + $this->value->genCSS( $output); + + }catch( Less_Exception_Parser $e ){ + $e->index = $this->index; + $e->currentFile = $this->currentFileInfo; + throw $e; + } + $output->add( $this->important . (($this->inline || (Less_Environment::$lastRule && Less_Parser::$options['compress'])) ? "" : ";"), $this->currentFileInfo, $this->index); + } + + public function compile ($env){ + + $name = $this->name; + if( is_array($name) ){ + // expand 'primitive' name directly to get + // things faster (~10% for benchmark.less): + if( count($name) === 1 && $name[0] instanceof Less_Tree_Keyword ){ + $name = $name[0]->value; + }else{ + $name = $this->CompileName($env,$name); + } + } + + $strictMathBypass = Less_Parser::$options['strictMath']; + if( $name === "font" && !Less_Parser::$options['strictMath'] ){ + Less_Parser::$options['strictMath'] = true; + } + + try { + $evaldValue = $this->value->compile($env); + + if( !$this->variable && $evaldValue->type === "DetachedRuleset") { + throw new Less_Exception_Compiler("Rulesets cannot be evaluated on a property.", null, $this->index, $this->currentFileInfo); + } + + if( Less_Environment::$mixin_stack ){ + $return = new Less_Tree_Rule($name, $evaldValue, $this->important, $this->merge, $this->index, $this->currentFileInfo, $this->inline); + }else{ + $this->name = $name; + $this->value = $evaldValue; + $return = $this; + } + + }catch( Less_Exception_Parser $e ){ + if( !is_numeric($e->index) ){ + $e->index = $this->index; + $e->currentFile = $this->currentFileInfo; + } + throw $e; + } + + Less_Parser::$options['strictMath'] = $strictMathBypass; + + return $return; + } + + + public function CompileName( $env, $name ){ + $output = new Less_Output(); + foreach($name as $n){ + $n->compile($env)->genCSS($output); + } + return $output->toString(); + } + + public function makeImportant(){ + return new Less_Tree_Rule($this->name, $this->value, '!important', $this->merge, $this->index, $this->currentFileInfo, $this->inline); + } + +} + + +/** + * Ruleset + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Ruleset extends Less_Tree{ + + protected $lookups; + public $_variables; + public $_rulesets; + + public $strictImports; + + public $selectors; + public $rules; + public $root; + public $allowImports; + public $paths; + public $firstRoot; + public $type = 'Ruleset'; + public $multiMedia; + public $allExtends; + + public $ruleset_id; + public $originalRuleset; + + public $first_oelements; + + public function SetRulesetIndex(){ + $this->ruleset_id = Less_Parser::$next_id++; + $this->originalRuleset = $this->ruleset_id; + + if( $this->selectors ){ + foreach($this->selectors as $sel){ + if( $sel->_oelements ){ + $this->first_oelements[$sel->_oelements[0]] = true; + } + } + } + } + + public function __construct($selectors, $rules, $strictImports = null){ + $this->selectors = $selectors; + $this->rules = $rules; + $this->lookups = array(); + $this->strictImports = $strictImports; + $this->SetRulesetIndex(); + } + + public function accept( $visitor ){ + if( $this->paths ){ + $paths_len = count($this->paths); + for($i = 0,$paths_len; $i < $paths_len; $i++ ){ + $this->paths[$i] = $visitor->visitArray($this->paths[$i]); + } + }elseif( $this->selectors ){ + $this->selectors = $visitor->visitArray($this->selectors); + } + + if( $this->rules ){ + $this->rules = $visitor->visitArray($this->rules); + } + } + + public function compile($env){ + + $ruleset = $this->PrepareRuleset($env); + + + // Store the frames around mixin definitions, + // so they can be evaluated like closures when the time comes. + $rsRuleCnt = count($ruleset->rules); + for( $i = 0; $i < $rsRuleCnt; $i++ ){ + if( $ruleset->rules[$i] instanceof Less_Tree_Mixin_Definition || $ruleset->rules[$i] instanceof Less_Tree_DetachedRuleset ){ + $ruleset->rules[$i] = $ruleset->rules[$i]->compile($env); + } + } + + $mediaBlockCount = 0; + if( $env instanceof Less_Environment ){ + $mediaBlockCount = count($env->mediaBlocks); + } + + // Evaluate mixin calls. + $this->EvalMixinCalls( $ruleset, $env, $rsRuleCnt ); + + + // Evaluate everything else + for( $i=0; $i<$rsRuleCnt; $i++ ){ + if(! ($ruleset->rules[$i] instanceof Less_Tree_Mixin_Definition || $ruleset->rules[$i] instanceof Less_Tree_DetachedRuleset) ){ + $ruleset->rules[$i] = $ruleset->rules[$i]->compile($env); + } + } + + // Evaluate everything else + for( $i=0; $i<$rsRuleCnt; $i++ ){ + $rule = $ruleset->rules[$i]; + + // for rulesets, check if it is a css guard and can be removed + if( $rule instanceof Less_Tree_Ruleset && $rule->selectors && count($rule->selectors) === 1 ){ + + // check if it can be folded in (e.g. & where) + if( $rule->selectors[0]->isJustParentSelector() ){ + array_splice($ruleset->rules,$i--,1); + $rsRuleCnt--; + + for($j = 0; $j < count($rule->rules); $j++ ){ + $subRule = $rule->rules[$j]; + if( !($subRule instanceof Less_Tree_Rule) || !$subRule->variable ){ + array_splice($ruleset->rules, ++$i, 0, array($subRule)); + $rsRuleCnt++; + } + } + + } + } + } + + + // Pop the stack + $env->shiftFrame(); + + if ($mediaBlockCount) { + $len = count($env->mediaBlocks); + for($i = $mediaBlockCount; $i < $len; $i++ ){ + $env->mediaBlocks[$i]->bubbleSelectors($ruleset->selectors); + } + } + + return $ruleset; + } + + /** + * Compile Less_Tree_Mixin_Call objects + * + * @param Less_Tree_Ruleset $ruleset + * @param integer $rsRuleCnt + */ + private function EvalMixinCalls( $ruleset, $env, &$rsRuleCnt ){ + for($i=0; $i < $rsRuleCnt; $i++){ + $rule = $ruleset->rules[$i]; + + if( $rule instanceof Less_Tree_Mixin_Call ){ + $rule = $rule->compile($env); + + $temp = array(); + foreach($rule as $r){ + if( ($r instanceof Less_Tree_Rule) && $r->variable ){ + // do not pollute the scope if the variable is + // already there. consider returning false here + // but we need a way to "return" variable from mixins + if( !$ruleset->variable($r->name) ){ + $temp[] = $r; + } + }else{ + $temp[] = $r; + } + } + $temp_count = count($temp)-1; + array_splice($ruleset->rules, $i, 1, $temp); + $rsRuleCnt += $temp_count; + $i += $temp_count; + $ruleset->resetCache(); + + }elseif( $rule instanceof Less_Tree_RulesetCall ){ + + $rule = $rule->compile($env); + $rules = array(); + foreach($rule->rules as $r){ + if( ($r instanceof Less_Tree_Rule) && $r->variable ){ + continue; + } + $rules[] = $r; + } + + array_splice($ruleset->rules, $i, 1, $rules); + $temp_count = count($rules); + $rsRuleCnt += $temp_count - 1; + $i += $temp_count-1; + $ruleset->resetCache(); + } + + } + } + + + /** + * Compile the selectors and create a new ruleset object for the compile() method + * + */ + private function PrepareRuleset($env){ + + $hasOnePassingSelector = false; + $selectors = array(); + if( $this->selectors ){ + Less_Tree_DefaultFunc::error("it is currently only allowed in parametric mixin guards,"); + + foreach($this->selectors as $s){ + $selector = $s->compile($env); + $selectors[] = $selector; + if( $selector->evaldCondition ){ + $hasOnePassingSelector = true; + } + } + + Less_Tree_DefaultFunc::reset(); + } else { + $hasOnePassingSelector = true; + } + + if( $this->rules && $hasOnePassingSelector ){ + $rules = $this->rules; + }else{ + $rules = array(); + } + + $ruleset = new Less_Tree_Ruleset($selectors, $rules, $this->strictImports); + + $ruleset->originalRuleset = $this->ruleset_id; + + $ruleset->root = $this->root; + $ruleset->firstRoot = $this->firstRoot; + $ruleset->allowImports = $this->allowImports; + + + // push the current ruleset to the frames stack + $env->unshiftFrame($ruleset); + + + // Evaluate imports + if( $ruleset->root || $ruleset->allowImports || !$ruleset->strictImports ){ + $ruleset->evalImports($env); + } + + return $ruleset; + } + + function evalImports($env) { + + $rules_len = count($this->rules); + for($i=0; $i < $rules_len; $i++){ + $rule = $this->rules[$i]; + + if( $rule instanceof Less_Tree_Import ){ + $rules = $rule->compile($env); + if( is_array($rules) ){ + array_splice($this->rules, $i, 1, $rules); + $temp_count = count($rules)-1; + $i += $temp_count; + $rules_len += $temp_count; + }else{ + array_splice($this->rules, $i, 1, array($rules)); + } + + $this->resetCache(); + } + } + } + + function makeImportant(){ + + $important_rules = array(); + foreach($this->rules as $rule){ + if( $rule instanceof Less_Tree_Rule || $rule instanceof Less_Tree_Ruleset ){ + $important_rules[] = $rule->makeImportant(); + }else{ + $important_rules[] = $rule; + } + } + + return new Less_Tree_Ruleset($this->selectors, $important_rules, $this->strictImports ); + } + + public function matchArgs($args){ + return !$args; + } + + // lets you call a css selector with a guard + public function matchCondition( $args, $env ){ + $lastSelector = end($this->selectors); + + if( !$lastSelector->evaldCondition ){ + return false; + } + if( $lastSelector->condition && !$lastSelector->condition->compile( $env->copyEvalEnv( $env->frames ) ) ){ + return false; + } + return true; + } + + function resetCache(){ + $this->_rulesets = null; + $this->_variables = null; + $this->lookups = array(); + } + + public function variables(){ + $this->_variables = array(); + foreach( $this->rules as $r){ + if ($r instanceof Less_Tree_Rule && $r->variable === true) { + $this->_variables[$r->name] = $r; + } + } + } + + public function variable($name){ + + if( is_null($this->_variables) ){ + $this->variables(); + } + return isset($this->_variables[$name]) ? $this->_variables[$name] : null; + } + + public function find( $selector, $self = null ){ + + $key = implode(' ',$selector->_oelements); + + if( !isset($this->lookups[$key]) ){ + + if( !$self ){ + $self = $this->ruleset_id; + } + + $this->lookups[$key] = array(); + + $first_oelement = $selector->_oelements[0]; + + foreach($this->rules as $rule){ + if( $rule instanceof Less_Tree_Ruleset && $rule->ruleset_id != $self ){ + + if( isset($rule->first_oelements[$first_oelement]) ){ + + foreach( $rule->selectors as $ruleSelector ){ + $match = $selector->match($ruleSelector); + if( $match ){ + if( $selector->elements_len > $match ){ + $this->lookups[$key] = array_merge($this->lookups[$key], $rule->find( new Less_Tree_Selector(array_slice($selector->elements, $match)), $self)); + } else { + $this->lookups[$key][] = $rule; + } + break; + } + } + } + } + } + } + + return $this->lookups[$key]; + } + + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + + if( !$this->root ){ + Less_Environment::$tabLevel++; + } + + $tabRuleStr = $tabSetStr = ''; + if( !Less_Parser::$options['compress'] ){ + if( Less_Environment::$tabLevel ){ + $tabRuleStr = "\n".str_repeat( ' ' , Less_Environment::$tabLevel ); + $tabSetStr = "\n".str_repeat( ' ' , Less_Environment::$tabLevel-1 ); + }else{ + $tabSetStr = $tabRuleStr = "\n"; + } + } + + + $ruleNodes = array(); + $rulesetNodes = array(); + foreach($this->rules as $rule){ + + $class = get_class($rule); + if( ($class === 'Less_Tree_Media') || ($class === 'Less_Tree_Directive') || ($this->root && $class === 'Less_Tree_Comment') || ($class === 'Less_Tree_Ruleset' && $rule->rules) ){ + $rulesetNodes[] = $rule; + }else{ + $ruleNodes[] = $rule; + } + } + + // If this is the root node, we don't render + // a selector, or {}. + if( !$this->root ){ + + /* + debugInfo = tree.debugInfo(env, this, tabSetStr); + + if (debugInfo) { + output.add(debugInfo); + output.add(tabSetStr); + } + */ + + $paths_len = count($this->paths); + for( $i = 0; $i < $paths_len; $i++ ){ + $path = $this->paths[$i]; + $firstSelector = true; + + foreach($path as $p){ + $p->genCSS( $output, $firstSelector ); + $firstSelector = false; + } + + if( $i + 1 < $paths_len ){ + $output->add( ',' . $tabSetStr ); + } + } + + $output->add( (Less_Parser::$options['compress'] ? '{' : " {") . $tabRuleStr ); + } + + // Compile rules and rulesets + $ruleNodes_len = count($ruleNodes); + $rulesetNodes_len = count($rulesetNodes); + for( $i = 0; $i < $ruleNodes_len; $i++ ){ + $rule = $ruleNodes[$i]; + + // @page{ directive ends up with root elements inside it, a mix of rules and rulesets + // In this instance we do not know whether it is the last property + if( $i + 1 === $ruleNodes_len && (!$this->root || $rulesetNodes_len === 0 || $this->firstRoot ) ){ + Less_Environment::$lastRule = true; + } + + $rule->genCSS( $output ); + + if( !Less_Environment::$lastRule ){ + $output->add( $tabRuleStr ); + }else{ + Less_Environment::$lastRule = false; + } + } + + if( !$this->root ){ + $output->add( $tabSetStr . '}' ); + Less_Environment::$tabLevel--; + } + + $firstRuleset = true; + $space = ($this->root ? $tabRuleStr : $tabSetStr); + for( $i = 0; $i < $rulesetNodes_len; $i++ ){ + + if( $ruleNodes_len && $firstRuleset ){ + $output->add( $space ); + }elseif( !$firstRuleset ){ + $output->add( $space ); + } + $firstRuleset = false; + $rulesetNodes[$i]->genCSS( $output); + } + + if( !Less_Parser::$options['compress'] && $this->firstRoot ){ + $output->add( "\n" ); + } + + } + + + function markReferenced(){ + if( !$this->selectors ){ + return; + } + foreach($this->selectors as $selector){ + $selector->markReferenced(); + } + } + + public function joinSelectors( $context, $selectors ){ + $paths = array(); + if( is_array($selectors) ){ + foreach($selectors as $selector) { + $this->joinSelector( $paths, $context, $selector); + } + } + return $paths; + } + + public function joinSelector( &$paths, $context, $selector){ + + $hasParentSelector = false; + + foreach($selector->elements as $el) { + if( $el->value === '&') { + $hasParentSelector = true; + } + } + + if( !$hasParentSelector ){ + if( $context ){ + foreach($context as $context_el){ + $paths[] = array_merge($context_el, array($selector) ); + } + }else { + $paths[] = array($selector); + } + return; + } + + + // The paths are [[Selector]] + // The first list is a list of comma seperated selectors + // The inner list is a list of inheritance seperated selectors + // e.g. + // .a, .b { + // .c { + // } + // } + // == [[.a] [.c]] [[.b] [.c]] + // + + // the elements from the current selector so far + $currentElements = array(); + // the current list of new selectors to add to the path. + // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors + // by the parents + $newSelectors = array(array()); + + + foreach( $selector->elements as $el){ + + // non parent reference elements just get added + if( $el->value !== '&' ){ + $currentElements[] = $el; + } else { + // the new list of selectors to add + $selectorsMultiplied = array(); + + // merge the current list of non parent selector elements + // on to the current list of selectors to add + if( $currentElements ){ + $this->mergeElementsOnToSelectors( $currentElements, $newSelectors); + } + + // loop through our current selectors + foreach($newSelectors as $sel){ + + // if we don't have any parent paths, the & might be in a mixin so that it can be used + // whether there are parents or not + if( !$context ){ + // the combinator used on el should now be applied to the next element instead so that + // it is not lost + if( $sel ){ + $sel[0]->elements = array_slice($sel[0]->elements,0); + $sel[0]->elements[] = new Less_Tree_Element($el->combinator, '', $el->index, $el->currentFileInfo ); + } + $selectorsMultiplied[] = $sel; + }else { + + // and the parent selectors + foreach($context as $parentSel){ + // We need to put the current selectors + // then join the last selector's elements on to the parents selectors + + // our new selector path + $newSelectorPath = array(); + // selectors from the parent after the join + $afterParentJoin = array(); + $newJoinedSelectorEmpty = true; + + //construct the joined selector - if & is the first thing this will be empty, + // if not newJoinedSelector will be the last set of elements in the selector + if( $sel ){ + $newSelectorPath = $sel; + $lastSelector = array_pop($newSelectorPath); + $newJoinedSelector = $selector->createDerived( array_slice($lastSelector->elements,0) ); + $newJoinedSelectorEmpty = false; + } + else { + $newJoinedSelector = $selector->createDerived(array()); + } + + //put together the parent selectors after the join + if ( count($parentSel) > 1) { + $afterParentJoin = array_merge($afterParentJoin, array_slice($parentSel,1) ); + } + + if ( $parentSel ){ + $newJoinedSelectorEmpty = false; + + // join the elements so far with the first part of the parent + $newJoinedSelector->elements[] = new Less_Tree_Element( $el->combinator, $parentSel[0]->elements[0]->value, $el->index, $el->currentFileInfo); + + $newJoinedSelector->elements = array_merge( $newJoinedSelector->elements, array_slice($parentSel[0]->elements, 1) ); + } + + if (!$newJoinedSelectorEmpty) { + // now add the joined selector + $newSelectorPath[] = $newJoinedSelector; + } + + // and the rest of the parent + $newSelectorPath = array_merge($newSelectorPath, $afterParentJoin); + + // add that to our new set of selectors + $selectorsMultiplied[] = $newSelectorPath; + } + } + } + + // our new selectors has been multiplied, so reset the state + $newSelectors = $selectorsMultiplied; + $currentElements = array(); + } + } + + // if we have any elements left over (e.g. .a& .b == .b) + // add them on to all the current selectors + if( $currentElements ){ + $this->mergeElementsOnToSelectors($currentElements, $newSelectors); + } + foreach( $newSelectors as $new_sel){ + if( $new_sel ){ + $paths[] = $new_sel; + } + } + } + + function mergeElementsOnToSelectors( $elements, &$selectors){ + + if( !$selectors ){ + $selectors[] = array( new Less_Tree_Selector($elements) ); + return; + } + + + foreach( $selectors as &$sel){ + + // if the previous thing in sel is a parent this needs to join on to it + if( $sel ){ + $last = count($sel)-1; + $sel[$last] = $sel[$last]->createDerived( array_merge($sel[$last]->elements, $elements) ); + }else{ + $sel[] = new Less_Tree_Selector( $elements ); + } + } + } +} + + +/** + * RulesetCall + * + * @package Less + * @subpackage tree + */ +class Less_Tree_RulesetCall extends Less_Tree{ + + public $variable; + public $type = "RulesetCall"; + + public function __construct($variable){ + $this->variable = $variable; + } + + public function accept($visitor) {} + + public function compile( $env ){ + $variable = new Less_Tree_Variable($this->variable); + $detachedRuleset = $variable->compile($env); + return $detachedRuleset->callEval($env); + } +} + + + +/** + * Selector + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Selector extends Less_Tree{ + + public $elements; + public $condition; + public $extendList = array(); + public $_css; + public $index; + public $evaldCondition = false; + public $type = 'Selector'; + public $currentFileInfo = array(); + public $isReferenced; + public $mediaEmpty; + + public $elements_len = 0; + + public $_oelements; + public $_oelements_len; + public $cacheable = true; + + /** + * @param boolean $isReferenced + */ + public function __construct( $elements, $extendList = array() , $condition = null, $index=null, $currentFileInfo=null, $isReferenced=null ){ + + $this->elements = $elements; + $this->elements_len = count($elements); + $this->extendList = $extendList; + $this->condition = $condition; + if( $currentFileInfo ){ + $this->currentFileInfo = $currentFileInfo; + } + $this->isReferenced = $isReferenced; + if( !$condition ){ + $this->evaldCondition = true; + } + + $this->CacheElements(); + } + + public function accept($visitor) { + $this->elements = $visitor->visitArray($this->elements); + $this->extendList = $visitor->visitArray($this->extendList); + if( $this->condition ){ + $this->condition = $visitor->visitObj($this->condition); + } + + if( $visitor instanceof Less_Visitor_extendFinder ){ + $this->CacheElements(); + } + } + + public function createDerived( $elements, $extendList = null, $evaldCondition = null ){ + $newSelector = new Less_Tree_Selector( $elements, ($extendList ? $extendList : $this->extendList), null, $this->index, $this->currentFileInfo, $this->isReferenced); + $newSelector->evaldCondition = $evaldCondition ? $evaldCondition : $this->evaldCondition; + return $newSelector; + } + + + public function match( $other ){ + + if( !$other->_oelements || ($this->elements_len < $other->_oelements_len) ){ + return 0; + } + + for( $i = 0; $i < $other->_oelements_len; $i++ ){ + if( $this->elements[$i]->value !== $other->_oelements[$i]) { + return 0; + } + } + + return $other->_oelements_len; // return number of matched elements + } + + + public function CacheElements(){ + + $this->_oelements = array(); + $css = ''; + + foreach($this->elements as $v){ + + $css .= $v->combinator; + if( !$v->value_is_object ){ + $css .= $v->value; + continue; + } + + if( !property_exists($v->value,'value') || !is_string($v->value->value) ){ + $this->cacheable = false; + return; + } + $css .= $v->value->value; + } + + $this->_oelements_len = preg_match_all('/[,&#\.\w-](?:[\w-]|(?:\\\\.))*/', $css, $matches); + if( $this->_oelements_len ){ + $this->_oelements = $matches[0]; + + if( $this->_oelements[0] === '&' ){ + array_shift($this->_oelements); + $this->_oelements_len--; + } + } + } + + public function isJustParentSelector(){ + return !$this->mediaEmpty && + count($this->elements) === 1 && + $this->elements[0]->value === '&' && + ($this->elements[0]->combinator === ' ' || $this->elements[0]->combinator === ''); + } + + public function compile($env) { + + $elements = array(); + foreach($this->elements as $el){ + $elements[] = $el->compile($env); + } + + $extendList = array(); + foreach($this->extendList as $el){ + $extendList[] = $el->compile($el); + } + + $evaldCondition = false; + if( $this->condition ){ + $evaldCondition = $this->condition->compile($env); + } + + return $this->createDerived( $elements, $extendList, $evaldCondition ); + } + + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output, $firstSelector = true ){ + + if( !$firstSelector && $this->elements[0]->combinator === "" ){ + $output->add(' ', $this->currentFileInfo, $this->index); + } + + foreach($this->elements as $element){ + $element->genCSS( $output ); + } + } + + public function markReferenced(){ + $this->isReferenced = true; + } + + public function getIsReferenced(){ + return !isset($this->currentFileInfo['reference']) || !$this->currentFileInfo['reference'] || $this->isReferenced; + } + + public function getIsOutput(){ + return $this->evaldCondition; + } + +} + + +/** + * UnicodeDescriptor + * + * @package Less + * @subpackage tree + */ +class Less_Tree_UnicodeDescriptor extends Less_Tree{ + + public $value; + public $type = 'UnicodeDescriptor'; + + public function __construct($value){ + $this->value = $value; + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( $this->value ); + } + + public function compile(){ + return $this; + } +} + + + +/** + * Unit + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Unit extends Less_Tree{ + + var $numerator = array(); + var $denominator = array(); + public $backupUnit; + public $type = 'Unit'; + + public function __construct($numerator = array(), $denominator = array(), $backupUnit = null ){ + $this->numerator = $numerator; + $this->denominator = $denominator; + $this->backupUnit = $backupUnit; + } + + public function __clone(){ + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + + if( $this->numerator ){ + $output->add( $this->numerator[0] ); + }elseif( $this->denominator ){ + $output->add( $this->denominator[0] ); + }elseif( !Less_Parser::$options['strictUnits'] && $this->backupUnit ){ + $output->add( $this->backupUnit ); + return ; + } + } + + public function toString(){ + $returnStr = implode('*',$this->numerator); + foreach($this->denominator as $d){ + $returnStr .= '/'.$d; + } + return $returnStr; + } + + public function __toString(){ + return $this->toString(); + } + + + /** + * @param Less_Tree_Unit $other + */ + public function compare($other) { + return $this->is( $other->toString() ) ? 0 : -1; + } + + public function is($unitString){ + return $this->toString() === $unitString; + } + + public function isLength(){ + $css = $this->toCSS(); + return !!preg_match('/px|em|%|in|cm|mm|pc|pt|ex/',$css); + } + + public function isAngle() { + return isset( Less_Tree_UnitConversions::$angle[$this->toCSS()] ); + } + + public function isEmpty(){ + return !$this->numerator && !$this->denominator; + } + + public function isSingular() { + return count($this->numerator) <= 1 && !$this->denominator; + } + + + public function usedUnits(){ + $result = array(); + + foreach(Less_Tree_UnitConversions::$groups as $groupName){ + $group = Less_Tree_UnitConversions::${$groupName}; + + foreach($this->numerator as $atomicUnit){ + if( isset($group[$atomicUnit]) && !isset($result[$groupName]) ){ + $result[$groupName] = $atomicUnit; + } + } + + foreach($this->denominator as $atomicUnit){ + if( isset($group[$atomicUnit]) && !isset($result[$groupName]) ){ + $result[$groupName] = $atomicUnit; + } + } + } + + return $result; + } + + public function cancel(){ + $counter = array(); + $backup = null; + + foreach($this->numerator as $atomicUnit){ + if( !$backup ){ + $backup = $atomicUnit; + } + $counter[$atomicUnit] = ( isset($counter[$atomicUnit]) ? $counter[$atomicUnit] : 0) + 1; + } + + foreach($this->denominator as $atomicUnit){ + if( !$backup ){ + $backup = $atomicUnit; + } + $counter[$atomicUnit] = ( isset($counter[$atomicUnit]) ? $counter[$atomicUnit] : 0) - 1; + } + + $this->numerator = array(); + $this->denominator = array(); + + foreach($counter as $atomicUnit => $count){ + if( $count > 0 ){ + for( $i = 0; $i < $count; $i++ ){ + $this->numerator[] = $atomicUnit; + } + }elseif( $count < 0 ){ + for( $i = 0; $i < -$count; $i++ ){ + $this->denominator[] = $atomicUnit; + } + } + } + + if( !$this->numerator && !$this->denominator && $backup ){ + $this->backupUnit = $backup; + } + + sort($this->numerator); + sort($this->denominator); + } + + +} + + + +/** + * UnitConversions + * + * @package Less + * @subpackage tree + */ +class Less_Tree_UnitConversions{ + + public static $groups = array('length','duration','angle'); + + public static $length = array( + 'm'=> 1, + 'cm'=> 0.01, + 'mm'=> 0.001, + 'in'=> 0.0254, + 'px'=> 0.000264583, // 0.0254 / 96, + 'pt'=> 0.000352778, // 0.0254 / 72, + 'pc'=> 0.004233333, // 0.0254 / 72 * 12 + ); + + public static $duration = array( + 's'=> 1, + 'ms'=> 0.001 + ); + + public static $angle = array( + 'rad' => 0.1591549430919, // 1/(2*M_PI), + 'deg' => 0.002777778, // 1/360, + 'grad'=> 0.0025, // 1/400, + 'turn'=> 1 + ); + +} + +/** + * Url + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Url extends Less_Tree{ + + public $attrs; + public $value; + public $currentFileInfo; + public $isEvald; + public $type = 'Url'; + + public function __construct($value, $currentFileInfo = null, $isEvald = null){ + $this->value = $value; + $this->currentFileInfo = $currentFileInfo; + $this->isEvald = $isEvald; + } + + public function accept( $visitor ){ + $this->value = $visitor->visitObj($this->value); + } + + /** + * @see Less_Tree::genCSS + */ + public function genCSS( $output ){ + $output->add( 'url(' ); + $this->value->genCSS( $output ); + $output->add( ')' ); + } + + /** + * @param Less_Functions $ctx + */ + public function compile($ctx){ + $val = $this->value->compile($ctx); + + if( !$this->isEvald ){ + // Add the base path if the URL is relative + if( Less_Parser::$options['relativeUrls'] + && $this->currentFileInfo + && is_string($val->value) + && Less_Environment::isPathRelative($val->value) + ){ + $rootpath = $this->currentFileInfo['uri_root']; + if ( !$val->quote ){ + $rootpath = preg_replace('/[\(\)\'"\s]/', '\\$1', $rootpath ); + } + $val->value = $rootpath . $val->value; + } + + $val->value = Less_Environment::normalizePath( $val->value); + } + + // Add cache buster if enabled + if( Less_Parser::$options['urlArgs'] ){ + if( !preg_match('/^\s*data:/',$val->value) ){ + $delimiter = strpos($val->value,'?') === false ? '?' : '&'; + $urlArgs = $delimiter . Less_Parser::$options['urlArgs']; + $hash_pos = strpos($val->value,'#'); + if( $hash_pos !== false ){ + $val->value = substr_replace($val->value,$urlArgs, $hash_pos, 0); + } else { + $val->value .= $urlArgs; + } + } + } + + return new Less_Tree_URL($val, $this->currentFileInfo, true); + } + +} + + +/** + * Value + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Value extends Less_Tree{ + + public $type = 'Value'; + public $value; + + public function __construct($value){ + $this->value = $value; + } + + public function accept($visitor) { + $this->value = $visitor->visitArray($this->value); + } + + public function compile($env){ + + $ret = array(); + $i = 0; + foreach($this->value as $i => $v){ + $ret[] = $v->compile($env); + } + if( $i > 0 ){ + return new Less_Tree_Value($ret); + } + return $ret[0]; + } + + /** + * @see Less_Tree::genCSS + */ + function genCSS( $output ){ + $len = count($this->value); + for($i = 0; $i < $len; $i++ ){ + $this->value[$i]->genCSS( $output ); + if( $i+1 < $len ){ + $output->add( Less_Environment::$_outputMap[','] ); + } + } + } + +} + + +/** + * Variable + * + * @package Less + * @subpackage tree + */ +class Less_Tree_Variable extends Less_Tree{ + + public $name; + public $index; + public $currentFileInfo; + public $evaluating = false; + public $type = 'Variable'; + + /** + * @param string $name + */ + public function __construct($name, $index = null, $currentFileInfo = null) { + $this->name = $name; + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + } + + public function compile($env) { + + if( $this->name[1] === '@' ){ + $v = new Less_Tree_Variable(substr($this->name, 1), $this->index + 1, $this->currentFileInfo); + $name = '@' . $v->compile($env)->value; + }else{ + $name = $this->name; + } + + if ($this->evaluating) { + throw new Less_Exception_Compiler("Recursive variable definition for " . $name, null, $this->index, $this->currentFileInfo); + } + + $this->evaluating = true; + + foreach($env->frames as $frame){ + if( $v = $frame->variable($name) ){ + $r = $v->value->compile($env); + $this->evaluating = false; + return $r; + } + } + + throw new Less_Exception_Compiler("variable " . $name . " is undefined in file ".$this->currentFileInfo["filename"], null, $this->index, $this->currentFileInfo); + } + +} + + + +class Less_Tree_Mixin_Call extends Less_Tree{ + + public $selector; + public $arguments; + public $index; + public $currentFileInfo; + + public $important; + public $type = 'MixinCall'; + + /** + * less.js: tree.mixin.Call + * + */ + public function __construct($elements, $args, $index, $currentFileInfo, $important = false){ + $this->selector = new Less_Tree_Selector($elements); + $this->arguments = $args; + $this->index = $index; + $this->currentFileInfo = $currentFileInfo; + $this->important = $important; + } + + //function accept($visitor){ + // $this->selector = $visitor->visit($this->selector); + // $this->arguments = $visitor->visit($this->arguments); + //} + + + public function compile($env){ + + $rules = array(); + $match = false; + $isOneFound = false; + $candidates = array(); + $defaultUsed = false; + $conditionResult = array(); + + $args = array(); + foreach($this->arguments as $a){ + $args[] = array('name'=> $a['name'], 'value' => $a['value']->compile($env) ); + } + + foreach($env->frames as $frame){ + + $mixins = $frame->find($this->selector); + + if( !$mixins ){ + continue; + } + + $isOneFound = true; + $defNone = 0; + $defTrue = 1; + $defFalse = 2; + + // To make `default()` function independent of definition order we have two "subpasses" here. + // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`), + // and build candidate list with corresponding flags. Then, when we know all possible matches, + // we make a final decision. + + $mixins_len = count($mixins); + for( $m = 0; $m < $mixins_len; $m++ ){ + $mixin = $mixins[$m]; + + if( $this->IsRecursive( $env, $mixin ) ){ + continue; + } + + if( $mixin->matchArgs($args, $env) ){ + + $candidate = array('mixin' => $mixin, 'group' => $defNone); + + if( $mixin instanceof Less_Tree_Ruleset ){ + + for( $f = 0; $f < 2; $f++ ){ + Less_Tree_DefaultFunc::value($f); + $conditionResult[$f] = $mixin->matchCondition( $args, $env); + } + if( $conditionResult[0] || $conditionResult[1] ){ + if( $conditionResult[0] != $conditionResult[1] ){ + $candidate['group'] = $conditionResult[1] ? $defTrue : $defFalse; + } + + $candidates[] = $candidate; + } + }else{ + $candidates[] = $candidate; + } + + $match = true; + } + } + + Less_Tree_DefaultFunc::reset(); + + + $count = array(0, 0, 0); + for( $m = 0; $m < count($candidates); $m++ ){ + $count[ $candidates[$m]['group'] ]++; + } + + if( $count[$defNone] > 0 ){ + $defaultResult = $defFalse; + } else { + $defaultResult = $defTrue; + if( ($count[$defTrue] + $count[$defFalse]) > 1 ){ + throw new Exception( 'Ambiguous use of `default()` found when matching for `'. $this->format($args) + '`' ); + } + } + + + $candidates_length = count($candidates); + $length_1 = ($candidates_length == 1); + + for( $m = 0; $m < $candidates_length; $m++){ + $candidate = $candidates[$m]['group']; + if( ($candidate === $defNone) || ($candidate === $defaultResult) ){ + try{ + $mixin = $candidates[$m]['mixin']; + if( !($mixin instanceof Less_Tree_Mixin_Definition) ){ + $mixin = new Less_Tree_Mixin_Definition('', array(), $mixin->rules, null, false); + $mixin->originalRuleset = $mixins[$m]->originalRuleset; + } + $rules = array_merge($rules, $mixin->evalCall($env, $args, $this->important)->rules); + } catch (Exception $e) { + //throw new Less_Exception_Compiler($e->getMessage(), $e->index, null, $this->currentFileInfo['filename']); + throw new Less_Exception_Compiler($e->getMessage(), null, null, $this->currentFileInfo); + } + } + } + + if( $match ){ + if( !$this->currentFileInfo || !isset($this->currentFileInfo['reference']) || !$this->currentFileInfo['reference'] ){ + Less_Tree::ReferencedArray($rules); + } + + return $rules; + } + } + + if( $isOneFound ){ + throw new Less_Exception_Compiler('No matching definition was found for `'.$this->Format( $args ).'`', null, $this->index, $this->currentFileInfo); + + }else{ + throw new Less_Exception_Compiler(trim($this->selector->toCSS()) . " is undefined in ".$this->currentFileInfo['filename'], null, $this->index); + } + + } + + /** + * Format the args for use in exception messages + * + */ + private function Format($args){ + $message = array(); + if( $args ){ + foreach($args as $a){ + $argValue = ''; + if( $a['name'] ){ + $argValue += $a['name']+':'; + } + if( is_object($a['value']) ){ + $argValue += $a['value']->toCSS(); + }else{ + $argValue += '???'; + } + $message[] = $argValue; + } + } + return implode(', ',$message); + } + + + /** + * Are we in a recursive mixin call? + * + * @return bool + */ + private function IsRecursive( $env, $mixin ){ + + foreach($env->frames as $recur_frame){ + if( !($mixin instanceof Less_Tree_Mixin_Definition) ){ + + if( $mixin === $recur_frame ){ + return true; + } + + if( isset($recur_frame->originalRuleset) && $mixin->ruleset_id === $recur_frame->originalRuleset ){ + return true; + } + } + } + + return false; + } + +} + + + + +class Less_Tree_Mixin_Definition extends Less_Tree_Ruleset{ + public $name; + public $selectors; + public $params; + public $arity = 0; + public $rules; + public $lookups = array(); + public $required = 0; + public $frames = array(); + public $condition; + public $variadic; + public $type = 'MixinDefinition'; + + + // less.js : /lib/less/tree/mixin.js : tree.mixin.Definition + public function __construct($name, $params, $rules, $condition, $variadic = false, $frames = array() ){ + $this->name = $name; + $this->selectors = array(new Less_Tree_Selector(array( new Less_Tree_Element(null, $name)))); + + $this->params = $params; + $this->condition = $condition; + $this->variadic = $variadic; + $this->rules = $rules; + + if( $params ){ + $this->arity = count($params); + foreach( $params as $p ){ + if (! isset($p['name']) || ($p['name'] && !isset($p['value']))) { + $this->required++; + } + } + } + + $this->frames = $frames; + $this->SetRulesetIndex(); + } + + + + //function accept( $visitor ){ + // $this->params = $visitor->visit($this->params); + // $this->rules = $visitor->visit($this->rules); + // $this->condition = $visitor->visit($this->condition); + //} + + + public function toCSS(){ + return ''; + } + + // less.js : /lib/less/tree/mixin.js : tree.mixin.Definition.evalParams + public function compileParams($env, $mixinFrames, $args = array() , &$evaldArguments = array() ){ + $frame = new Less_Tree_Ruleset(null, array()); + $params = $this->params; + $mixinEnv = null; + $argsLength = 0; + + if( $args ){ + $argsLength = count($args); + for($i = 0; $i < $argsLength; $i++ ){ + $arg = $args[$i]; + + if( $arg && $arg['name'] ){ + $isNamedFound = false; + + foreach($params as $j => $param){ + if( !isset($evaldArguments[$j]) && $arg['name'] === $params[$j]['name']) { + $evaldArguments[$j] = $arg['value']->compile($env); + array_unshift($frame->rules, new Less_Tree_Rule( $arg['name'], $arg['value']->compile($env) ) ); + $isNamedFound = true; + break; + } + } + if ($isNamedFound) { + array_splice($args, $i, 1); + $i--; + $argsLength--; + continue; + } else { + throw new Less_Exception_Compiler("Named argument for " . $this->name .' '.$args[$i]['name'] . ' not found'); + } + } + } + } + + $argIndex = 0; + foreach($params as $i => $param){ + + if ( isset($evaldArguments[$i]) ){ continue; } + + $arg = null; + if( isset($args[$argIndex]) ){ + $arg = $args[$argIndex]; + } + + if (isset($param['name']) && $param['name']) { + + if( isset($param['variadic']) ){ + $varargs = array(); + for ($j = $argIndex; $j < $argsLength; $j++) { + $varargs[] = $args[$j]['value']->compile($env); + } + $expression = new Less_Tree_Expression($varargs); + array_unshift($frame->rules, new Less_Tree_Rule($param['name'], $expression->compile($env))); + }else{ + $val = ($arg && $arg['value']) ? $arg['value'] : false; + + if ($val) { + $val = $val->compile($env); + } else if ( isset($param['value']) ) { + + if( !$mixinEnv ){ + $mixinEnv = new Less_Environment(); + $mixinEnv->frames = array_merge( array($frame), $mixinFrames); + } + + $val = $param['value']->compile($mixinEnv); + $frame->resetCache(); + } else { + throw new Less_Exception_Compiler("Wrong number of arguments for " . $this->name . " (" . $argsLength . ' for ' . $this->arity . ")"); + } + + array_unshift($frame->rules, new Less_Tree_Rule($param['name'], $val)); + $evaldArguments[$i] = $val; + } + } + + if ( isset($param['variadic']) && $args) { + for ($j = $argIndex; $j < $argsLength; $j++) { + $evaldArguments[$j] = $args[$j]['value']->compile($env); + } + } + $argIndex++; + } + + ksort($evaldArguments); + $evaldArguments = array_values($evaldArguments); + + return $frame; + } + + public function compile($env) { + if( $this->frames ){ + return new Less_Tree_Mixin_Definition($this->name, $this->params, $this->rules, $this->condition, $this->variadic, $this->frames ); + } + return new Less_Tree_Mixin_Definition($this->name, $this->params, $this->rules, $this->condition, $this->variadic, $env->frames ); + } + + public function evalCall($env, $args = NULL, $important = NULL) { + + Less_Environment::$mixin_stack++; + + $_arguments = array(); + + if( $this->frames ){ + $mixinFrames = array_merge($this->frames, $env->frames); + }else{ + $mixinFrames = $env->frames; + } + + $frame = $this->compileParams($env, $mixinFrames, $args, $_arguments); + + $ex = new Less_Tree_Expression($_arguments); + array_unshift($frame->rules, new Less_Tree_Rule('@arguments', $ex->compile($env))); + + + $ruleset = new Less_Tree_Ruleset(null, $this->rules); + $ruleset->originalRuleset = $this->ruleset_id; + + + $ruleSetEnv = new Less_Environment(); + $ruleSetEnv->frames = array_merge( array($this, $frame), $mixinFrames ); + $ruleset = $ruleset->compile( $ruleSetEnv ); + + if( $important ){ + $ruleset = $ruleset->makeImportant(); + } + + Less_Environment::$mixin_stack--; + + return $ruleset; + } + + + public function matchCondition($args, $env) { + + if( !$this->condition ){ + return true; + } + + // set array to prevent error on array_merge + if(!is_array($this->frames)) { + $this->frames = array(); + } + + $frame = $this->compileParams($env, array_merge($this->frames,$env->frames), $args ); + + $compile_env = new Less_Environment(); + $compile_env->frames = array_merge( + array($frame) // the parameter variables + , $this->frames // the parent namespace/mixin frames + , $env->frames // the current environment frames + ); + + $compile_env->functions = $env->functions; + + return (bool)$this->condition->compile($compile_env); + } + + public function matchArgs($args, $env = NULL){ + $argsLength = count($args); + + if( !$this->variadic ){ + if( $argsLength < $this->required ){ + return false; + } + if( $argsLength > count($this->params) ){ + return false; + } + }else{ + if( $argsLength < ($this->required - 1)){ + return false; + } + } + + $len = min($argsLength, $this->arity); + + for( $i = 0; $i < $len; $i++ ){ + if( !isset($this->params[$i]['name']) && !isset($this->params[$i]['variadic']) ){ + if( $args[$i]['value']->compile($env)->toCSS() != $this->params[$i]['value']->compile($env)->toCSS() ){ + return false; + } + } + } + + return true; + } + +} + + +/** + * Extend Finder Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor_extendFinder extends Less_Visitor{ + + public $contexts = array(); + public $allExtendsStack; + public $foundExtends; + + public function __construct(){ + $this->contexts = array(); + $this->allExtendsStack = array(array()); + parent::__construct(); + } + + /** + * @param Less_Tree_Ruleset $root + */ + public function run($root){ + $root = $this->visitObj($root); + $root->allExtends =& $this->allExtendsStack[0]; + return $root; + } + + public function visitRule($ruleNode, &$visitDeeper ){ + $visitDeeper = false; + } + + public function visitMixinDefinition( $mixinDefinitionNode, &$visitDeeper ){ + $visitDeeper = false; + } + + public function visitRuleset($rulesetNode){ + + if( $rulesetNode->root ){ + return; + } + + $allSelectorsExtendList = array(); + + // get &:extend(.a); rules which apply to all selectors in this ruleset + if( $rulesetNode->rules ){ + foreach($rulesetNode->rules as $rule){ + if( $rule instanceof Less_Tree_Extend ){ + $allSelectorsExtendList[] = $rule; + $rulesetNode->extendOnEveryPath = true; + } + } + } + + + // now find every selector and apply the extends that apply to all extends + // and the ones which apply to an individual extend + foreach($rulesetNode->paths as $selectorPath){ + $selector = end($selectorPath); //$selectorPath[ count($selectorPath)-1]; + + $j = 0; + foreach($selector->extendList as $extend){ + $this->allExtendsStackPush($rulesetNode, $selectorPath, $extend, $j); + } + foreach($allSelectorsExtendList as $extend){ + $this->allExtendsStackPush($rulesetNode, $selectorPath, $extend, $j); + } + } + + $this->contexts[] = $rulesetNode->selectors; + } + + public function allExtendsStackPush($rulesetNode, $selectorPath, $extend, &$j){ + $this->foundExtends = true; + $extend = clone $extend; + $extend->findSelfSelectors( $selectorPath ); + $extend->ruleset = $rulesetNode; + if( $j === 0 ){ + $extend->firstExtendOnThisSelectorPath = true; + } + + $end_key = count($this->allExtendsStack)-1; + $this->allExtendsStack[$end_key][] = $extend; + $j++; + } + + + public function visitRulesetOut( $rulesetNode ){ + if( !is_object($rulesetNode) || !$rulesetNode->root ){ + array_pop($this->contexts); + } + } + + public function visitMedia( $mediaNode ){ + $mediaNode->allExtends = array(); + $this->allExtendsStack[] =& $mediaNode->allExtends; + } + + public function visitMediaOut(){ + array_pop($this->allExtendsStack); + } + + public function visitDirective( $directiveNode ){ + $directiveNode->allExtends = array(); + $this->allExtendsStack[] =& $directiveNode->allExtends; + } + + public function visitDirectiveOut(){ + array_pop($this->allExtendsStack); + } +} + + + + +/* +class Less_Visitor_import extends Less_VisitorReplacing{ + + public $_visitor; + public $_importer; + public $importCount; + + function __construct( $evalEnv ){ + $this->env = $evalEnv; + $this->importCount = 0; + parent::__construct(); + } + + + function run( $root ){ + $root = $this->visitObj($root); + $this->isFinished = true; + + //if( $this->importCount === 0) { + // $this->_finish(); + //} + } + + function visitImport($importNode, &$visitDeeper ){ + $importVisitor = $this; + $inlineCSS = $importNode->options['inline']; + + if( !$importNode->css || $inlineCSS ){ + $evaldImportNode = $importNode->compileForImport($this->env); + + if( $evaldImportNode && (!$evaldImportNode->css || $inlineCSS) ){ + $importNode = $evaldImportNode; + $this->importCount++; + $env = clone $this->env; + + if( (isset($importNode->options['multiple']) && $importNode->options['multiple']) ){ + $env->importMultiple = true; + } + + //get path & uri + $path_and_uri = null; + if( is_callable(Less_Parser::$options['import_callback']) ){ + $path_and_uri = call_user_func(Less_Parser::$options['import_callback'],$importNode); + } + + if( !$path_and_uri ){ + $path_and_uri = $importNode->PathAndUri(); + } + + if( $path_and_uri ){ + list($full_path, $uri) = $path_and_uri; + }else{ + $full_path = $uri = $importNode->getPath(); + } + + + //import once + if( $importNode->skip( $full_path, $env) ){ + return array(); + } + + if( $importNode->options['inline'] ){ + //todo needs to reference css file not import + //$contents = new Less_Tree_Anonymous($importNode->root, 0, array('filename'=>$importNode->importedFilename), true ); + + Less_Parser::AddParsedFile($full_path); + $contents = new Less_Tree_Anonymous( file_get_contents($full_path), 0, array(), true ); + + if( $importNode->features ){ + return new Less_Tree_Media( array($contents), $importNode->features->value ); + } + + return array( $contents ); + } + + + // css ? + if( $importNode->css ){ + $features = ( $importNode->features ? $importNode->features->compile($env) : null ); + return new Less_Tree_Import( $importNode->compilePath( $env), $features, $importNode->options, $this->index); + } + + return $importNode->ParseImport( $full_path, $uri, $env ); + } + + } + + $visitDeeper = false; + return $importNode; + } + + + function visitRule( $ruleNode, &$visitDeeper ){ + $visitDeeper = false; + return $ruleNode; + } + + function visitDirective($directiveNode, $visitArgs){ + array_unshift($this->env->frames,$directiveNode); + return $directiveNode; + } + + function visitDirectiveOut($directiveNode) { + array_shift($this->env->frames); + } + + function visitMixinDefinition($mixinDefinitionNode, $visitArgs) { + array_unshift($this->env->frames,$mixinDefinitionNode); + return $mixinDefinitionNode; + } + + function visitMixinDefinitionOut($mixinDefinitionNode) { + array_shift($this->env->frames); + } + + function visitRuleset($rulesetNode, $visitArgs) { + array_unshift($this->env->frames,$rulesetNode); + return $rulesetNode; + } + + function visitRulesetOut($rulesetNode) { + array_shift($this->env->frames); + } + + function visitMedia($mediaNode, $visitArgs) { + array_unshift($this->env->frames, $mediaNode->ruleset); + return $mediaNode; + } + + function visitMediaOut($mediaNode) { + array_shift($this->env->frames); + } + +} +*/ + + + + +/** + * Join Selector Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor_joinSelector extends Less_Visitor{ + + public $contexts = array( array() ); + + /** + * @param Less_Tree_Ruleset $root + */ + public function run( $root ){ + return $this->visitObj($root); + } + + public function visitRule( $ruleNode, &$visitDeeper ){ + $visitDeeper = false; + } + + public function visitMixinDefinition( $mixinDefinitionNode, &$visitDeeper ){ + $visitDeeper = false; + } + + public function visitRuleset( $rulesetNode ){ + + $paths = array(); + + if( !$rulesetNode->root ){ + $selectors = array(); + + if( $rulesetNode->selectors && $rulesetNode->selectors ){ + foreach($rulesetNode->selectors as $selector){ + if( $selector->getIsOutput() ){ + $selectors[] = $selector; + } + } + } + + if( !$selectors ){ + $rulesetNode->selectors = null; + $rulesetNode->rules = null; + }else{ + $context = end($this->contexts); //$context = $this->contexts[ count($this->contexts) - 1]; + $paths = $rulesetNode->joinSelectors( $context, $selectors); + } + + $rulesetNode->paths = $paths; + } + + $this->contexts[] = $paths; //different from less.js. Placed after joinSelectors() so that $this->contexts will get correct $paths + } + + public function visitRulesetOut(){ + array_pop($this->contexts); + } + + public function visitMedia($mediaNode) { + $context = end($this->contexts); //$context = $this->contexts[ count($this->contexts) - 1]; + + if( !count($context) || (is_object($context[0]) && $context[0]->multiMedia) ){ + $mediaNode->rules[0]->root = true; + } + } + +} + + + +/** + * Process Extends Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor_processExtends extends Less_Visitor{ + + public $allExtendsStack; + + /** + * @param Less_Tree_Ruleset $root + */ + public function run( $root ){ + $extendFinder = new Less_Visitor_extendFinder(); + $extendFinder->run( $root ); + if( !$extendFinder->foundExtends){ + return $root; + } + + $root->allExtends = $this->doExtendChaining( $root->allExtends, $root->allExtends); + + $this->allExtendsStack = array(); + $this->allExtendsStack[] = &$root->allExtends; + + return $this->visitObj( $root ); + } + + private function doExtendChaining( $extendsList, $extendsListTarget, $iterationCount = 0){ + // + // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering and pasting + // the selector we would do normally, but we are also adding an extend with the same target selector + // this means this new extend can then go and alter other extends + // + // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors + // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already processed if + // we look at each selector at a time, as is done in visitRuleset + + $extendsToAdd = array(); + + + //loop through comparing every extend with every target extend. + // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place + // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one + // and the second is the target. + // the seperation into two lists allows us to process a subset of chains with a bigger set, as is the + // case when processing media queries + for( $extendIndex = 0, $extendsList_len = count($extendsList); $extendIndex < $extendsList_len; $extendIndex++ ){ + for( $targetExtendIndex = 0; $targetExtendIndex < count($extendsListTarget); $targetExtendIndex++ ){ + + $extend = $extendsList[$extendIndex]; + $targetExtend = $extendsListTarget[$targetExtendIndex]; + + // look for circular references + if( in_array($targetExtend->object_id, $extend->parent_ids,true) ){ + continue; + } + + // find a match in the target extends self selector (the bit before :extend) + $selectorPath = array( $targetExtend->selfSelectors[0] ); + $matches = $this->findMatch( $extend, $selectorPath); + + + if( $matches ){ + + // we found a match, so for each self selector.. + foreach($extend->selfSelectors as $selfSelector ){ + + + // process the extend as usual + $newSelector = $this->extendSelector( $matches, $selectorPath, $selfSelector); + + // but now we create a new extend from it + $newExtend = new Less_Tree_Extend( $targetExtend->selector, $targetExtend->option, 0); + $newExtend->selfSelectors = $newSelector; + + // add the extend onto the list of extends for that selector + end($newSelector)->extendList = array($newExtend); + //$newSelector[ count($newSelector)-1]->extendList = array($newExtend); + + // record that we need to add it. + $extendsToAdd[] = $newExtend; + $newExtend->ruleset = $targetExtend->ruleset; + + //remember its parents for circular references + $newExtend->parent_ids = array_merge($newExtend->parent_ids,$targetExtend->parent_ids,$extend->parent_ids); + + // only process the selector once.. if we have :extend(.a,.b) then multiple + // extends will look at the same selector path, so when extending + // we know that any others will be duplicates in terms of what is added to the css + if( $targetExtend->firstExtendOnThisSelectorPath ){ + $newExtend->firstExtendOnThisSelectorPath = true; + $targetExtend->ruleset->paths[] = $newSelector; + } + } + } + } + } + + if( $extendsToAdd ){ + // try to detect circular references to stop a stack overflow. + // may no longer be needed. $this->extendChainCount++; + if( $iterationCount > 100) { + + try{ + $selectorOne = $extendsToAdd[0]->selfSelectors[0]->toCSS(); + $selectorTwo = $extendsToAdd[0]->selector->toCSS(); + }catch(Exception $e){ + $selectorOne = "{unable to calculate}"; + $selectorTwo = "{unable to calculate}"; + } + + throw new Less_Exception_Parser("extend circular reference detected. One of the circular extends is currently:"+$selectorOne+":extend(" + $selectorTwo+")"); + } + + // now process the new extends on the existing rules so that we can handle a extending b extending c ectending d extending e... + $extendsToAdd = $this->doExtendChaining( $extendsToAdd, $extendsListTarget, $iterationCount+1); + } + + return array_merge($extendsList, $extendsToAdd); + } + + + protected function visitRule( $ruleNode, &$visitDeeper ){ + $visitDeeper = false; + } + + protected function visitMixinDefinition( $mixinDefinitionNode, &$visitDeeper ){ + $visitDeeper = false; + } + + protected function visitSelector( $selectorNode, &$visitDeeper ){ + $visitDeeper = false; + } + + protected function visitRuleset($rulesetNode){ + + + if( $rulesetNode->root ){ + return; + } + + $allExtends = end($this->allExtendsStack); + $paths_len = count($rulesetNode->paths); + + // look at each selector path in the ruleset, find any extend matches and then copy, find and replace + foreach($allExtends as $allExtend){ + for($pathIndex = 0; $pathIndex < $paths_len; $pathIndex++ ){ + + // extending extends happens initially, before the main pass + if( isset($rulesetNode->extendOnEveryPath) && $rulesetNode->extendOnEveryPath ){ + continue; + } + + $selectorPath = $rulesetNode->paths[$pathIndex]; + + if( end($selectorPath)->extendList ){ + continue; + } + + $this->ExtendMatch( $rulesetNode, $allExtend, $selectorPath); + + } + } + } + + + private function ExtendMatch( $rulesetNode, $extend, $selectorPath ){ + $matches = $this->findMatch($extend, $selectorPath); + + if( $matches ){ + foreach($extend->selfSelectors as $selfSelector ){ + $rulesetNode->paths[] = $this->extendSelector($matches, $selectorPath, $selfSelector); + } + } + } + + + + private function findMatch($extend, $haystackSelectorPath ){ + + + if( !$this->HasMatches($extend, $haystackSelectorPath) ){ + return false; + } + + + // + // look through the haystack selector path to try and find the needle - extend.selector + // returns an array of selector matches that can then be replaced + // + $needleElements = $extend->selector->elements; + $potentialMatches = array(); + $potentialMatches_len = 0; + $potentialMatch = null; + $matches = array(); + + + + // loop through the haystack elements + $haystack_path_len = count($haystackSelectorPath); + for($haystackSelectorIndex = 0; $haystackSelectorIndex < $haystack_path_len; $haystackSelectorIndex++ ){ + $hackstackSelector = $haystackSelectorPath[$haystackSelectorIndex]; + + $haystack_elements_len = count($hackstackSelector->elements); + for($hackstackElementIndex = 0; $hackstackElementIndex < $haystack_elements_len; $hackstackElementIndex++ ){ + + $haystackElement = $hackstackSelector->elements[$hackstackElementIndex]; + + // if we allow elements before our match we can add a potential match every time. otherwise only at the first element. + if( $extend->allowBefore || ($haystackSelectorIndex === 0 && $hackstackElementIndex === 0) ){ + $potentialMatches[] = array('pathIndex'=> $haystackSelectorIndex, 'index'=> $hackstackElementIndex, 'matched'=> 0, 'initialCombinator'=> $haystackElement->combinator); + $potentialMatches_len++; + } + + for($i = 0; $i < $potentialMatches_len; $i++ ){ + + $potentialMatch = &$potentialMatches[$i]; + $potentialMatch = $this->PotentialMatch( $potentialMatch, $needleElements, $haystackElement, $hackstackElementIndex ); + + + // if we are still valid and have finished, test whether we have elements after and whether these are allowed + if( $potentialMatch && $potentialMatch['matched'] === $extend->selector->elements_len ){ + $potentialMatch['finished'] = true; + + if( !$extend->allowAfter && ($hackstackElementIndex+1 < $haystack_elements_len || $haystackSelectorIndex+1 < $haystack_path_len) ){ + $potentialMatch = null; + } + } + + // if null we remove, if not, we are still valid, so either push as a valid match or continue + if( $potentialMatch ){ + if( $potentialMatch['finished'] ){ + $potentialMatch['length'] = $extend->selector->elements_len; + $potentialMatch['endPathIndex'] = $haystackSelectorIndex; + $potentialMatch['endPathElementIndex'] = $hackstackElementIndex + 1; // index after end of match + $potentialMatches = array(); // we don't allow matches to overlap, so start matching again + $potentialMatches_len = 0; + $matches[] = $potentialMatch; + } + continue; + } + + array_splice($potentialMatches, $i, 1); + $potentialMatches_len--; + $i--; + } + } + } + + return $matches; + } + + + // Before going through all the nested loops, lets check to see if a match is possible + // Reduces Bootstrap 3.1 compile time from ~6.5s to ~5.6s + private function HasMatches($extend, $haystackSelectorPath){ + + if( !$extend->selector->cacheable ){ + return true; + } + + $first_el = $extend->selector->_oelements[0]; + + foreach($haystackSelectorPath as $hackstackSelector){ + if( !$hackstackSelector->cacheable ){ + return true; + } + + if( in_array($first_el, $hackstackSelector->_oelements) ){ + return true; + } + } + + return false; + } + + + /** + * @param integer $hackstackElementIndex + */ + private function PotentialMatch( $potentialMatch, $needleElements, $haystackElement, $hackstackElementIndex ){ + + + if( $potentialMatch['matched'] > 0 ){ + + // selectors add " " onto the first element. When we use & it joins the selectors together, but if we don't + // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to work out + // what the resulting combinator will be + $targetCombinator = $haystackElement->combinator; + if( $targetCombinator === '' && $hackstackElementIndex === 0 ){ + $targetCombinator = ' '; + } + + if( $needleElements[ $potentialMatch['matched'] ]->combinator !== $targetCombinator ){ + return null; + } + } + + // if we don't match, null our match to indicate failure + if( !$this->isElementValuesEqual( $needleElements[$potentialMatch['matched'] ]->value, $haystackElement->value) ){ + return null; + } + + $potentialMatch['finished'] = false; + $potentialMatch['matched']++; + + return $potentialMatch; + } + + + private function isElementValuesEqual( $elementValue1, $elementValue2 ){ + + if( $elementValue1 === $elementValue2 ){ + return true; + } + + if( is_string($elementValue1) || is_string($elementValue2) ) { + return false; + } + + if( $elementValue1 instanceof Less_Tree_Attribute ){ + return $this->isAttributeValuesEqual( $elementValue1, $elementValue2 ); + } + + $elementValue1 = $elementValue1->value; + if( $elementValue1 instanceof Less_Tree_Selector ){ + return $this->isSelectorValuesEqual( $elementValue1, $elementValue2 ); + } + + return false; + } + + + /** + * @param Less_Tree_Selector $elementValue1 + */ + private function isSelectorValuesEqual( $elementValue1, $elementValue2 ){ + + $elementValue2 = $elementValue2->value; + if( !($elementValue2 instanceof Less_Tree_Selector) || $elementValue1->elements_len !== $elementValue2->elements_len ){ + return false; + } + + for( $i = 0; $i < $elementValue1->elements_len; $i++ ){ + + if( $elementValue1->elements[$i]->combinator !== $elementValue2->elements[$i]->combinator ){ + if( $i !== 0 || ($elementValue1->elements[$i]->combinator || ' ') !== ($elementValue2->elements[$i]->combinator || ' ') ){ + return false; + } + } + + if( !$this->isElementValuesEqual($elementValue1->elements[$i]->value, $elementValue2->elements[$i]->value) ){ + return false; + } + } + + return true; + } + + + /** + * @param Less_Tree_Attribute $elementValue1 + */ + private function isAttributeValuesEqual( $elementValue1, $elementValue2 ){ + + if( $elementValue1->op !== $elementValue2->op || $elementValue1->key !== $elementValue2->key ){ + return false; + } + + if( !$elementValue1->value || !$elementValue2->value ){ + if( $elementValue1->value || $elementValue2->value ) { + return false; + } + return true; + } + + $elementValue1 = ($elementValue1->value->value ? $elementValue1->value->value : $elementValue1->value ); + $elementValue2 = ($elementValue2->value->value ? $elementValue2->value->value : $elementValue2->value ); + + return $elementValue1 === $elementValue2; + } + + + private function extendSelector($matches, $selectorPath, $replacementSelector){ + + //for a set of matches, replace each match with the replacement selector + + $currentSelectorPathIndex = 0; + $currentSelectorPathElementIndex = 0; + $path = array(); + $selectorPath_len = count($selectorPath); + + for($matchIndex = 0, $matches_len = count($matches); $matchIndex < $matches_len; $matchIndex++ ){ + + + $match = $matches[$matchIndex]; + $selector = $selectorPath[ $match['pathIndex'] ]; + + $firstElement = new Less_Tree_Element( + $match['initialCombinator'], + $replacementSelector->elements[0]->value, + $replacementSelector->elements[0]->index, + $replacementSelector->elements[0]->currentFileInfo + ); + + if( $match['pathIndex'] > $currentSelectorPathIndex && $currentSelectorPathElementIndex > 0 ){ + $last_path = end($path); + $last_path->elements = array_merge( $last_path->elements, array_slice( $selectorPath[$currentSelectorPathIndex]->elements, $currentSelectorPathElementIndex)); + $currentSelectorPathElementIndex = 0; + $currentSelectorPathIndex++; + } + + $newElements = array_merge( + array_slice($selector->elements, $currentSelectorPathElementIndex, ($match['index'] - $currentSelectorPathElementIndex) ) // last parameter of array_slice is different than the last parameter of javascript's slice + , array($firstElement) + , array_slice($replacementSelector->elements,1) + ); + + if( $currentSelectorPathIndex === $match['pathIndex'] && $matchIndex > 0 ){ + $last_key = count($path)-1; + $path[$last_key]->elements = array_merge($path[$last_key]->elements,$newElements); + }else{ + $path = array_merge( $path, array_slice( $selectorPath, $currentSelectorPathIndex, $match['pathIndex'] )); + $path[] = new Less_Tree_Selector( $newElements ); + } + + $currentSelectorPathIndex = $match['endPathIndex']; + $currentSelectorPathElementIndex = $match['endPathElementIndex']; + if( $currentSelectorPathElementIndex >= count($selectorPath[$currentSelectorPathIndex]->elements) ){ + $currentSelectorPathElementIndex = 0; + $currentSelectorPathIndex++; + } + } + + if( $currentSelectorPathIndex < $selectorPath_len && $currentSelectorPathElementIndex > 0 ){ + $last_path = end($path); + $last_path->elements = array_merge( $last_path->elements, array_slice($selectorPath[$currentSelectorPathIndex]->elements, $currentSelectorPathElementIndex)); + $currentSelectorPathIndex++; + } + + $slice_len = $selectorPath_len - $currentSelectorPathIndex; + $path = array_merge($path, array_slice($selectorPath, $currentSelectorPathIndex, $slice_len)); + + return $path; + } + + + protected function visitMedia( $mediaNode ){ + $newAllExtends = array_merge( $mediaNode->allExtends, end($this->allExtendsStack) ); + $this->allExtendsStack[] = $this->doExtendChaining($newAllExtends, $mediaNode->allExtends); + } + + protected function visitMediaOut(){ + array_pop( $this->allExtendsStack ); + } + + protected function visitDirective( $directiveNode ){ + $newAllExtends = array_merge( $directiveNode->allExtends, end($this->allExtendsStack) ); + $this->allExtendsStack[] = $this->doExtendChaining($newAllExtends, $directiveNode->allExtends); + } + + protected function visitDirectiveOut(){ + array_pop($this->allExtendsStack); + } + +} + +/** + * toCSS Visitor + * + * @package Less + * @subpackage visitor + */ +class Less_Visitor_toCSS extends Less_VisitorReplacing{ + + private $charset; + + public function __construct(){ + parent::__construct(); + } + + /** + * @param Less_Tree_Ruleset $root + */ + public function run( $root ){ + return $this->visitObj($root); + } + + public function visitRule( $ruleNode ){ + if( $ruleNode->variable ){ + return array(); + } + return $ruleNode; + } + + public function visitMixinDefinition($mixinNode){ + // mixin definitions do not get eval'd - this means they keep state + // so we have to clear that state here so it isn't used if toCSS is called twice + $mixinNode->frames = array(); + return array(); + } + + public function visitExtend(){ + return array(); + } + + public function visitComment( $commentNode ){ + if( $commentNode->isSilent() ){ + return array(); + } + return $commentNode; + } + + public function visitMedia( $mediaNode, &$visitDeeper ){ + $mediaNode->accept($this); + $visitDeeper = false; + + if( !$mediaNode->rules ){ + return array(); + } + return $mediaNode; + } + + public function visitDirective( $directiveNode ){ + if( isset($directiveNode->currentFileInfo['reference']) && (!property_exists($directiveNode,'isReferenced') || !$directiveNode->isReferenced) ){ + return array(); + } + if( $directiveNode->name === '@charset' ){ + // Only output the debug info together with subsequent @charset definitions + // a comment (or @media statement) before the actual @charset directive would + // be considered illegal css as it has to be on the first line + if( isset($this->charset) && $this->charset ){ + + //if( $directiveNode->debugInfo ){ + // $comment = new Less_Tree_Comment('/* ' . str_replace("\n",'',$directiveNode->toCSS())." */\n"); + // $comment->debugInfo = $directiveNode->debugInfo; + // return $this->visit($comment); + //} + + + return array(); + } + $this->charset = true; + } + return $directiveNode; + } + + public function checkPropertiesInRoot( $rulesetNode ){ + + if( !$rulesetNode->firstRoot ){ + return; + } + + foreach($rulesetNode->rules as $ruleNode){ + if( $ruleNode instanceof Less_Tree_Rule && !$ruleNode->variable ){ + $msg = "properties must be inside selector blocks, they cannot be in the root. Index ".$ruleNode->index.($ruleNode->currentFileInfo ? (' Filename: '.$ruleNode->currentFileInfo['filename']) : null); + throw new Less_Exception_Compiler($msg); + } + } + } + + + public function visitRuleset( $rulesetNode, &$visitDeeper ){ + + $visitDeeper = false; + + $this->checkPropertiesInRoot( $rulesetNode ); + + if( $rulesetNode->root ){ + return $this->visitRulesetRoot( $rulesetNode ); + } + + $rulesets = array(); + $rulesetNode->paths = $this->visitRulesetPaths($rulesetNode); + + + // Compile rules and rulesets + $nodeRuleCnt = count($rulesetNode->rules); + for( $i = 0; $i < $nodeRuleCnt; ){ + $rule = $rulesetNode->rules[$i]; + + if( property_exists($rule,'rules') ){ + // visit because we are moving them out from being a child + $rulesets[] = $this->visitObj($rule); + array_splice($rulesetNode->rules,$i,1); + $nodeRuleCnt--; + continue; + } + $i++; + } + + + // accept the visitor to remove rules and refactor itself + // then we can decide now whether we want it or not + if( $nodeRuleCnt > 0 ){ + $rulesetNode->accept($this); + + if( $rulesetNode->rules ){ + + if( count($rulesetNode->rules) > 1 ){ + $this->_mergeRules( $rulesetNode->rules ); + $this->_removeDuplicateRules( $rulesetNode->rules ); + } + + // now decide whether we keep the ruleset + if( $rulesetNode->paths ){ + //array_unshift($rulesets, $rulesetNode); + array_splice($rulesets,0,0,array($rulesetNode)); + } + } + + } + + + if( count($rulesets) === 1 ){ + return $rulesets[0]; + } + return $rulesets; + } + + + /** + * Helper function for visitiRuleset + * + * return array|Less_Tree_Ruleset + */ + private function visitRulesetRoot( $rulesetNode ){ + $rulesetNode->accept( $this ); + if( $rulesetNode->firstRoot || $rulesetNode->rules ){ + return $rulesetNode; + } + return array(); + } + + + /** + * Helper function for visitRuleset() + * + * @return array + */ + private function visitRulesetPaths($rulesetNode){ + + $paths = array(); + foreach($rulesetNode->paths as $p){ + if( $p[0]->elements[0]->combinator === ' ' ){ + $p[0]->elements[0]->combinator = ''; + } + + foreach($p as $pi){ + if( $pi->getIsReferenced() && $pi->getIsOutput() ){ + $paths[] = $p; + break; + } + } + } + + return $paths; + } + + protected function _removeDuplicateRules( &$rules ){ + // remove duplicates + $ruleCache = array(); + for( $i = count($rules)-1; $i >= 0 ; $i-- ){ + $rule = $rules[$i]; + if( $rule instanceof Less_Tree_Rule || $rule instanceof Less_Tree_NameValue ){ + + if( !isset($ruleCache[$rule->name]) ){ + $ruleCache[$rule->name] = $rule; + }else{ + $ruleList =& $ruleCache[$rule->name]; + + if( $ruleList instanceof Less_Tree_Rule || $ruleList instanceof Less_Tree_NameValue ){ + $ruleList = $ruleCache[$rule->name] = array( $ruleCache[$rule->name]->toCSS() ); + } + + $ruleCSS = $rule->toCSS(); + if( array_search($ruleCSS,$ruleList) !== false ){ + array_splice($rules,$i,1); + }else{ + $ruleList[] = $ruleCSS; + } + } + } + } + } + + protected function _mergeRules( &$rules ){ + $groups = array(); + + //obj($rules); + + $rules_len = count($rules); + for( $i = 0; $i < $rules_len; $i++ ){ + $rule = $rules[$i]; + + if( ($rule instanceof Less_Tree_Rule) && $rule->merge ){ + + $key = $rule->name; + if( $rule->important ){ + $key .= ',!'; + } + + if( !isset($groups[$key]) ){ + $groups[$key] = array(); + }else{ + array_splice($rules, $i--, 1); + $rules_len--; + } + + $groups[$key][] = $rule; + } + } + + + foreach($groups as $parts){ + + if( count($parts) > 1 ){ + $rule = $parts[0]; + $spacedGroups = array(); + $lastSpacedGroup = array(); + $parts_mapped = array(); + foreach($parts as $p){ + if( $p->merge === '+' ){ + if( $lastSpacedGroup ){ + $spacedGroups[] = self::toExpression($lastSpacedGroup); + } + $lastSpacedGroup = array(); + } + $lastSpacedGroup[] = $p; + } + + $spacedGroups[] = self::toExpression($lastSpacedGroup); + $rule->value = self::toValue($spacedGroups); + } + } + + } + + public static function toExpression($values){ + $mapped = array(); + foreach($values as $p){ + $mapped[] = $p->value; + } + return new Less_Tree_Expression( $mapped ); + } + + public static function toValue($values){ + //return new Less_Tree_Value($values); ?? + + $mapped = array(); + foreach($values as $p){ + $mapped[] = $p; + } + return new Less_Tree_Value($mapped); + } +} + +
+
+/**
+ * Parser Exception
+ *
+ * @package Less
+ * @subpackage exception
+ */
+class Less_Exception_Parser extends Exception{
+
+ /**
+ * The current file
+ *
+ * @var Less_ImportedFile
+ */
+ public $currentFile;
+
+ /**
+ * The current parser index
+ *
+ * @var integer
+ */
+ public $index;
+
+ protected $input;
+
+ protected $details = array();
+
+
+ /**
+ * Constructor
+ *
+ * @param string $message
+ * @param Exception $previous Previous exception
+ * @param integer $index The current parser index
+ * @param Less_FileInfo|string $currentFile The file
+ * @param integer $code The exception code
+ */
+ public function __construct($message = null, Exception $previous = null, $index = null, $currentFile = null, $code = 0){
+
+ if (PHP_VERSION_ID < 50300) {
+ $this->previous = $previous;
+ parent::__construct($message, $code);
+ } else {
+ parent::__construct($message, $code, $previous);
+ }
+
+ $this->currentFile = $currentFile;
+ $this->index = $index;
+
+ $this->genMessage();
+ }
+
+
+ protected function getInput(){
+
+ if( !$this->input && $this->currentFile && $this->currentFile['filename'] && file_exists($this->currentFile['filename']) ){
+ $this->input = file_get_contents( $this->currentFile['filename'] );
+ }
+ }
+
+
+
+ /**
+ * Converts the exception to string
+ *
+ * @return string
+ */
+ public function genMessage(){
+
+ if( $this->currentFile && $this->currentFile['filename'] ){
+ $this->message .= ' in '.basename($this->currentFile['filename']);
+ }
+
+ if( $this->index !== null ){
+ $this->getInput();
+ if( $this->input ){
+ $line = self::getLineNumber();
+ $this->message .= ' on line '.$line.', column '.self::getColumn();
+
+ $lines = explode("\n",$this->input);
+
+ $count = count($lines);
+ $start_line = max(0, $line-3);
+ $last_line = min($count, $start_line+6);
+ $num_len = strlen($last_line);
+ for( $i = $start_line; $i < $last_line; $i++ ){
+ $this->message .= "\n".str_pad($i+1,$num_len,'0',STR_PAD_LEFT).'| '.$lines[$i];
+ }
+ }
+ }
+
+ }
+
+ /**
+ * Returns the line number the error was encountered
+ *
+ * @return integer
+ */
+ public function getLineNumber(){
+ if( $this->index ){
+ // https://bugs.php.net/bug.php?id=49790
+ if (ini_get("mbstring.func_overload")) {
+ return substr_count(substr($this->input, 0, $this->index), "\n") + 1;
+ } else {
+ return substr_count($this->input, "\n", 0, $this->index) + 1;
+ }
+ }
+ return 1;
+ }
+
+
+ /**
+ * Returns the column the error was encountered
+ *
+ * @return integer
+ */
+ public function getColumn(){
+
+ $part = substr($this->input, 0, $this->index);
+ $pos = strrpos($part,"\n");
+ return $this->index - $pos;
+ }
+
+}
+
+
+/**
+ * Chunk Exception
+ *
+ * @package Less
+ * @subpackage exception
+ */
+class Less_Exception_Chunk extends Less_Exception_Parser{
+
+
+ protected $parserCurrentIndex = 0;
+
+ protected $emitFrom = 0;
+
+ protected $input_len;
+
+
+ /**
+ * Constructor
+ *
+ * @param string $input
+ * @param Exception $previous Previous exception
+ * @param integer $index The current parser index
+ * @param Less_FileInfo|string $currentFile The file
+ * @param integer $code The exception code
+ */
+ public function __construct($input, Exception $previous = null, $index = null, $currentFile = null, $code = 0){
+
+ $this->message = 'ParseError: Unexpected input'; //default message
+
+ $this->index = $index;
+
+ $this->currentFile = $currentFile;
+
+ $this->input = $input;
+ $this->input_len = strlen($input);
+
+ $this->Chunks();
+ $this->genMessage();
+ }
+
+
+ /**
+ * See less.js chunks()
+ * We don't actually need the chunks
+ *
+ */
+ protected function Chunks(){
+ $level = 0;
+ $parenLevel = 0;
+ $lastMultiCommentEndBrace = null;
+ $lastOpening = null;
+ $lastMultiComment = null;
+ $lastParen = null;
+
+ for( $this->parserCurrentIndex = 0; $this->parserCurrentIndex < $this->input_len; $this->parserCurrentIndex++ ){
+ $cc = $this->CharCode($this->parserCurrentIndex);
+ if ((($cc >= 97) && ($cc <= 122)) || ($cc < 34)) {
+ // a-z or whitespace
+ continue;
+ }
+
+ switch ($cc) {
+
+ // (
+ case 40:
+ $parenLevel++;
+ $lastParen = $this->parserCurrentIndex;
+ continue;
+
+ // )
+ case 41:
+ $parenLevel--;
+ if( $parenLevel < 0 ){
+ return $this->fail("missing opening `(`");
+ }
+ continue;
+
+ // ;
+ case 59:
+ //if (!$parenLevel) { $this->emitChunk(); }
+ continue;
+
+ // {
+ case 123:
+ $level++;
+ $lastOpening = $this->parserCurrentIndex;
+ continue;
+
+ // }
+ case 125:
+ $level--;
+ if( $level < 0 ){
+ return $this->fail("missing opening `{`");
+
+ }
+ //if (!$level && !$parenLevel) { $this->emitChunk(); }
+ continue;
+ // \
+ case 92:
+ if ($this->parserCurrentIndex < $this->input_len - 1) { $this->parserCurrentIndex++; continue; }
+ return $this->fail("unescaped `\\`");
+
+ // ", ' and `
+ case 34:
+ case 39:
+ case 96:
+ $matched = 0;
+ $currentChunkStartIndex = $this->parserCurrentIndex;
+ for ($this->parserCurrentIndex = $this->parserCurrentIndex + 1; $this->parserCurrentIndex < $this->input_len; $this->parserCurrentIndex++) {
+ $cc2 = $this->CharCode($this->parserCurrentIndex);
+ if ($cc2 > 96) { continue; }
+ if ($cc2 == $cc) { $matched = 1; break; }
+ if ($cc2 == 92) { // \
+ if ($this->parserCurrentIndex == $this->input_len - 1) {
+ return $this->fail("unescaped `\\`");
+ }
+ $this->parserCurrentIndex++;
+ }
+ }
+ if ($matched) { continue; }
+ return $this->fail("unmatched `" + chr($cc) + "`", $currentChunkStartIndex);
+
+ // /, check for comment
+ case 47:
+ if ($parenLevel || ($this->parserCurrentIndex == $this->input_len - 1)) { continue; }
+ $cc2 = $this->CharCode($this->parserCurrentIndex+1);
+ if ($cc2 == 47) {
+ // //, find lnfeed
+ for ($this->parserCurrentIndex = $this->parserCurrentIndex + 2; $this->parserCurrentIndex < $this->input_len; $this->parserCurrentIndex++) {
+ $cc2 = $this->CharCode($this->parserCurrentIndex);
+ if (($cc2 <= 13) && (($cc2 == 10) || ($cc2 == 13))) { break; }
+ }
+ } else if ($cc2 == 42) {
+ // /*, find */
+ $lastMultiComment = $currentChunkStartIndex = $this->parserCurrentIndex;
+ for ($this->parserCurrentIndex = $this->parserCurrentIndex + 2; $this->parserCurrentIndex < $this->input_len - 1; $this->parserCurrentIndex++) {
+ $cc2 = $this->CharCode($this->parserCurrentIndex);
+ if ($cc2 == 125) { $lastMultiCommentEndBrace = $this->parserCurrentIndex; }
+ if ($cc2 != 42) { continue; }
+ if ($this->CharCode($this->parserCurrentIndex+1) == 47) { break; }
+ }
+ if ($this->parserCurrentIndex == $this->input_len - 1) {
+ return $this->fail("missing closing `*/`", $currentChunkStartIndex);
+ }
+ }
+ continue;
+
+ // *, check for unmatched */
+ case 42:
+ if (($this->parserCurrentIndex < $this->input_len - 1) && ($this->CharCode($this->parserCurrentIndex+1) == 47)) {
+ return $this->fail("unmatched `/*`");
+ }
+ continue;
+ }
+ }
+
+ if( $level !== 0 ){
+ if( ($lastMultiComment > $lastOpening) && ($lastMultiCommentEndBrace > $lastMultiComment) ){
+ return $this->fail("missing closing `}` or `*/`", $lastOpening);
+ } else {
+ return $this->fail("missing closing `}`", $lastOpening);
+ }
+ } else if ( $parenLevel !== 0 ){
+ return $this->fail("missing closing `)`", $lastParen);
+ }
+
+
+ //chunk didn't fail
+
+
+ //$this->emitChunk(true);
+ }
+
+ public function CharCode($pos){
+ return ord($this->input[$pos]);
+ }
+
+
+ public function fail( $msg, $index = null ){
+
+ if( !$index ){
+ $this->index = $this->parserCurrentIndex;
+ }else{
+ $this->index = $index;
+ }
+ $this->message = 'ParseError: '.$msg;
+ }
+
+
+ /*
+ function emitChunk( $force = false ){
+ $len = $this->parserCurrentIndex - $this->emitFrom;
+ if ((($len < 512) && !$force) || !$len) {
+ return;
+ }
+ $chunks[] = substr($this->input, $this->emitFrom, $this->parserCurrentIndex + 1 - $this->emitFrom );
+ $this->emitFrom = $this->parserCurrentIndex + 1;
+ }
+ */
+
+}
+
+
+/**
+ * Compiler Exception
+ *
+ * @package Less
+ * @subpackage exception
+ */
+class Less_Exception_Compiler extends Less_Exception_Parser{
+
+}
+
+/**
+ * Parser output with source map
+ *
+ * @package Less
+ * @subpackage Output
+ */
+class Less_Output_Mapped extends Less_Output {
+
+ /**
+ * The source map generator
+ *
+ * @var Less_SourceMap_Generator
+ */
+ protected $generator;
+
+ /**
+ * Current line
+ *
+ * @var integer
+ */
+ protected $lineNumber = 0;
+
+ /**
+ * Current column
+ *
+ * @var integer
+ */
+ protected $column = 0;
+
+ /**
+ * Array of contents map (file and its content)
+ *
+ * @var array
+ */
+ protected $contentsMap = array();
+
+ /**
+ * Constructor
+ *
+ * @param array $contentsMap Array of filename to contents map
+ * @param Less_SourceMap_Generator $generator
+ */
+ public function __construct(array $contentsMap, $generator){
+ $this->contentsMap = $contentsMap;
+ $this->generator = $generator;
+ }
+
+ /**
+ * Adds a chunk to the stack
+ * The $index for less.php may be different from less.js since less.php does not chunkify inputs
+ *
+ * @param string $chunk
+ * @param string $fileInfo
+ * @param integer $index
+ * @param mixed $mapLines
+ */
+ public function add($chunk, $fileInfo = null, $index = 0, $mapLines = null){
+
+ //ignore adding empty strings
+ if( $chunk === '' ){
+ return;
+ }
+
+
+ $sourceLines = array();
+ $sourceColumns = ' ';
+
+
+ if( $fileInfo ){
+
+ $url = $fileInfo['currentUri'];
+
+ if( isset($this->contentsMap[$url]) ){
+ $inputSource = substr($this->contentsMap[$url], 0, $index);
+ $sourceLines = explode("\n", $inputSource);
+ $sourceColumns = end($sourceLines);
+ }else{
+ throw new Exception('Filename '.$url.' not in contentsMap');
+ }
+
+ }
+
+ $lines = explode("\n", $chunk);
+ $columns = end($lines);
+
+ if($fileInfo){
+
+ if(!$mapLines){
+ $this->generator->addMapping(
+ $this->lineNumber + 1, // generated_line
+ $this->column, // generated_column
+ count($sourceLines), // original_line
+ strlen($sourceColumns), // original_column
+ $fileInfo
+ );
+ }else{
+ for($i = 0, $count = count($lines); $i < $count; $i++){
+ $this->generator->addMapping(
+ $this->lineNumber + $i + 1, // generated_line
+ $i === 0 ? $this->column : 0, // generated_column
+ count($sourceLines) + $i, // original_line
+ $i === 0 ? strlen($sourceColumns) : 0, // original_column
+ $fileInfo
+ );
+ }
+ }
+ }
+
+ if(count($lines) === 1){
+ $this->column += strlen($columns);
+ }else{
+ $this->lineNumber += count($lines) - 1;
+ $this->column = strlen($columns);
+ }
+
+ // add only chunk
+ parent::add($chunk);
+ }
+
+} + +/** + * Encode / Decode Base64 VLQ. + * + * @package Less + * @subpackage SourceMap + */ +class Less_SourceMap_Base64VLQ { + + /** + * Shift + * + * @var integer + */ + private $shift = 5; + + /** + * Mask + * + * @var integer + */ + private $mask = 0x1F; // == (1 << shift) == 0b00011111 + + /** + * Continuation bit + * + * @var integer + */ + private $continuationBit = 0x20; // == (mask - 1 ) == 0b00100000 + + /** + * Char to integer map + * + * @var array + */ + private $charToIntMap = array( + 'A' => 0, 'B' => 1, 'C' => 2, 'D' => 3, 'E' => 4, 'F' => 5, 'G' => 6, + 'H' => 7,'I' => 8, 'J' => 9, 'K' => 10, 'L' => 11, 'M' => 12, 'N' => 13, + 'O' => 14, 'P' => 15, 'Q' => 16, 'R' => 17, 'S' => 18, 'T' => 19, 'U' => 20, + 'V' => 21, 'W' => 22, 'X' => 23, 'Y' => 24, 'Z' => 25, 'a' => 26, 'b' => 27, + 'c' => 28, 'd' => 29, 'e' => 30, 'f' => 31, 'g' => 32, 'h' => 33, 'i' => 34, + 'j' => 35, 'k' => 36, 'l' => 37, 'm' => 38, 'n' => 39, 'o' => 40, 'p' => 41, + 'q' => 42, 'r' => 43, 's' => 44, 't' => 45, 'u' => 46, 'v' => 47, 'w' => 48, + 'x' => 49, 'y' => 50, 'z' => 51, 0 => 52, 1 => 53, 2 => 54, 3 => 55, 4 => 56, + 5 => 57, 6 => 58, 7 => 59, 8 => 60, 9 => 61, '+' => 62, '/' => 63, + ); + + /** + * Integer to char map + * + * @var array + */ + private $intToCharMap = array( + 0 => 'A', 1 => 'B', 2 => 'C', 3 => 'D', 4 => 'E', 5 => 'F', 6 => 'G', + 7 => 'H', 8 => 'I', 9 => 'J', 10 => 'K', 11 => 'L', 12 => 'M', 13 => 'N', + 14 => 'O', 15 => 'P', 16 => 'Q', 17 => 'R', 18 => 'S', 19 => 'T', 20 => 'U', + 21 => 'V', 22 => 'W', 23 => 'X', 24 => 'Y', 25 => 'Z', 26 => 'a', 27 => 'b', + 28 => 'c', 29 => 'd', 30 => 'e', 31 => 'f', 32 => 'g', 33 => 'h', 34 => 'i', + 35 => 'j', 36 => 'k', 37 => 'l', 38 => 'm', 39 => 'n', 40 => 'o', 41 => 'p', + 42 => 'q', 43 => 'r', 44 => 's', 45 => 't', 46 => 'u', 47 => 'v', 48 => 'w', + 49 => 'x', 50 => 'y', 51 => 'z', 52 => '0', 53 => '1', 54 => '2', 55 => '3', + 56 => '4', 57 => '5', 58 => '6', 59 => '7', 60 => '8', 61 => '9', 62 => '+', + 63 => '/', + ); + + /** + * Constructor + */ + public function __construct(){ + // I leave it here for future reference + // foreach(str_split('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/') as $i => $char) + // { + // $this->charToIntMap[$char] = $i; + // $this->intToCharMap[$i] = $char; + // } + } + + /** + * Convert from a two-complement value to a value where the sign bit is + * is placed in the least significant bit. For example, as decimals: + * 1 becomes 2 (10 binary), -1 becomes 3 (11 binary) + * 2 becomes 4 (100 binary), -2 becomes 5 (101 binary) + * We generate the value for 32 bit machines, hence -2147483648 becomes 1, not 4294967297, + * even on a 64 bit machine. + * @param string $aValue + */ + public function toVLQSigned($aValue){ + return 0xffffffff & ($aValue < 0 ? ((-$aValue) << 1) + 1 : ($aValue << 1) + 0); + } + + /** + * Convert to a two-complement value from a value where the sign bit is + * is placed in the least significant bit. For example, as decimals: + * 2 (10 binary) becomes 1, 3 (11 binary) becomes -1 + * 4 (100 binary) becomes 2, 5 (101 binary) becomes -2 + * We assume that the value was generated with a 32 bit machine in mind. + * Hence + * 1 becomes -2147483648 + * even on a 64 bit machine. + * @param integer $aValue + */ + public function fromVLQSigned($aValue){ + return $aValue & 1 ? $this->zeroFill(~$aValue + 2, 1) | (-1 - 0x7fffffff) : $this->zeroFill($aValue, 1); + } + + /** + * Return the base 64 VLQ encoded value. + * + * @param string $aValue The value to encode + * @return string The encoded value + */ + public function encode($aValue){ + $encoded = ''; + $vlq = $this->toVLQSigned($aValue); + do + { + $digit = $vlq & $this->mask; + $vlq = $this->zeroFill($vlq, $this->shift); + if($vlq > 0){ + $digit |= $this->continuationBit; + } + $encoded .= $this->base64Encode($digit); + } while($vlq > 0); + + return $encoded; + } + + /** + * Return the value decoded from base 64 VLQ. + * + * @param string $encoded The encoded value to decode + * @return integer The decoded value + */ + public function decode($encoded){ + $vlq = 0; + $i = 0; + do + { + $digit = $this->base64Decode($encoded[$i]); + $vlq |= ($digit & $this->mask) << ($i * $this->shift); + $i++; + } while($digit & $this->continuationBit); + + return $this->fromVLQSigned($vlq); + } + + /** + * Right shift with zero fill. + * + * @param integer $a number to shift + * @param integer $b number of bits to shift + * @return integer + */ + public function zeroFill($a, $b){ + return ($a >= 0) ? ($a >> $b) : ($a >> $b) & (PHP_INT_MAX >> ($b - 1)); + } + + /** + * Encode single 6-bit digit as base64. + * + * @param integer $number + * @return string + * @throws Exception If the number is invalid + */ + public function base64Encode($number){ + if($number < 0 || $number > 63){ + throw new Exception(sprintf('Invalid number "%s" given. Must be between 0 and 63.', $number)); + } + return $this->intToCharMap[$number]; + } + + /** + * Decode single 6-bit digit from base64 + * + * @param string $char + * @return number + * @throws Exception If the number is invalid + */ + public function base64Decode($char){ + if(!array_key_exists($char, $this->charToIntMap)){ + throw new Exception(sprintf('Invalid base 64 digit "%s" given.', $char)); + } + return $this->charToIntMap[$char]; + } + +} +
+
+/**
+ * Source map generator
+ *
+ * @package Less
+ * @subpackage Output
+ */
+class Less_SourceMap_Generator extends Less_Configurable {
+
+ /**
+ * What version of source map does the generator generate?
+ */
+ const VERSION = 3;
+
+ /**
+ * Array of default options
+ *
+ * @var array
+ */
+ protected $defaultOptions = array(
+ // an optional source root, useful for relocating source files
+ // on a server or removing repeated values in the 'sources' entry.
+ // This value is prepended to the individual entries in the 'source' field.
+ 'sourceRoot' => '',
+
+ // an optional name of the generated code that this source map is associated with.
+ 'sourceMapFilename' => null,
+
+ // url of the map
+ 'sourceMapURL' => null,
+
+ // absolute path to a file to write the map to
+ 'sourceMapWriteTo' => null,
+
+ // output source contents?
+ 'outputSourceFiles' => false,
+
+ // base path for filename normalization
+ 'sourceMapRootpath' => '',
+
+ // base path for filename normalization
+ 'sourceMapBasepath' => ''
+ );
+
+ /**
+ * The base64 VLQ encoder
+ *
+ * @var Less_SourceMap_Base64VLQ
+ */
+ protected $encoder;
+
+ /**
+ * Array of mappings
+ *
+ * @var array
+ */
+ protected $mappings = array();
+
+ /**
+ * The root node
+ *
+ * @var Less_Tree_Ruleset
+ */
+ protected $root;
+
+ /**
+ * Array of contents map
+ *
+ * @var array
+ */
+ protected $contentsMap = array();
+
+ /**
+ * File to content map
+ *
+ * @var array
+ */
+ protected $sources = array();
+ protected $source_keys = array();
+
+ /**
+ * Constructor
+ *
+ * @param Less_Tree_Ruleset $root The root node
+ * @param array $options Array of options
+ */
+ public function __construct(Less_Tree_Ruleset $root, $contentsMap, $options = array()){
+ $this->root = $root;
+ $this->contentsMap = $contentsMap;
+ $this->encoder = new Less_SourceMap_Base64VLQ();
+
+ $this->SetOptions($options);
+
+ $this->options['sourceMapRootpath'] = $this->fixWindowsPath($this->options['sourceMapRootpath'], true);
+ $this->options['sourceMapBasepath'] = $this->fixWindowsPath($this->options['sourceMapBasepath'], true);
+ }
+
+ /**
+ * Generates the CSS
+ *
+ * @return string
+ */
+ public function generateCSS(){
+ $output = new Less_Output_Mapped($this->contentsMap, $this);
+
+ // catch the output
+ $this->root->genCSS($output);
+
+
+ $sourceMapUrl = $this->getOption('sourceMapURL');
+ $sourceMapFilename = $this->getOption('sourceMapFilename');
+ $sourceMapContent = $this->generateJson();
+ $sourceMapWriteTo = $this->getOption('sourceMapWriteTo');
+
+ if( !$sourceMapUrl && $sourceMapFilename ){
+ $sourceMapUrl = $this->normalizeFilename($sourceMapFilename);
+ }
+
+ // write map to a file
+ if( $sourceMapWriteTo ){
+ $this->saveMap($sourceMapWriteTo, $sourceMapContent);
+ }
+
+ // inline the map
+ if( !$sourceMapUrl ){
+ $sourceMapUrl = sprintf('data:application/json,%s', Less_Functions::encodeURIComponent($sourceMapContent));
+ }
+
+ if( $sourceMapUrl ){
+ $output->add( sprintf('/*# sourceMappingURL=%s */', $sourceMapUrl) );
+ }
+
+ return $output->toString();
+ }
+
+ /**
+ * Saves the source map to a file
+ *
+ * @param string $file The absolute path to a file
+ * @param string $content The content to write
+ * @throws Exception If the file could not be saved
+ */
+ protected function saveMap($file, $content){
+ $dir = dirname($file);
+ // directory does not exist
+ if( !is_dir($dir) ){
+ // FIXME: create the dir automatically?
+ throw new Exception(sprintf('The directory "%s" does not exist. Cannot save the source map.', $dir));
+ }
+ // FIXME: proper saving, with dir write check!
+ if(file_put_contents($file, $content) === false){
+ throw new Exception(sprintf('Cannot save the source map to "%s"', $file));
+ }
+ return true;
+ }
+
+ /**
+ * Normalizes the filename
+ *
+ * @param string $filename
+ * @return string
+ */
+ protected function normalizeFilename($filename){
+
+ $filename = $this->fixWindowsPath($filename);
+
+ $rootpath = $this->getOption('sourceMapRootpath');
+ $basePath = $this->getOption('sourceMapBasepath');
+
+ // "Trim" the 'sourceMapBasepath' from the output filename.
+ if (strpos($filename, $basePath) === 0) {
+ $filename = substr($filename, strlen($basePath));
+ }
+
+ // Remove extra leading path separators.
+ if(strpos($filename, '\\') === 0 || strpos($filename, '/') === 0){
+ $filename = substr($filename, 1);
+ }
+
+ return $rootpath . $filename;
+ }
+
+ /**
+ * Adds a mapping
+ *
+ * @param integer $generatedLine The line number in generated file
+ * @param integer $generatedColumn The column number in generated file
+ * @param integer $originalLine The line number in original file
+ * @param integer $originalColumn The column number in original file
+ * @param string $sourceFile The original source file
+ */
+ public function addMapping($generatedLine, $generatedColumn, $originalLine, $originalColumn, $fileInfo ){
+
+ $this->mappings[] = array(
+ 'generated_line' => $generatedLine,
+ 'generated_column' => $generatedColumn,
+ 'original_line' => $originalLine,
+ 'original_column' => $originalColumn,
+ 'source_file' => $fileInfo['currentUri']
+ );
+
+ $this->sources[$fileInfo['currentUri']] = $fileInfo['filename'];
+ }
+
+
+ /**
+ * Generates the JSON source map
+ *
+ * @return string
+ * @see https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#
+ */
+ protected function generateJson(){
+
+ $sourceMap = array();
+ $mappings = $this->generateMappings();
+
+ // File version (always the first entry in the object) and must be a positive integer.
+ $sourceMap['version'] = self::VERSION;
+
+
+ // An optional name of the generated code that this source map is associated with.
+ $file = $this->getOption('sourceMapFilename');
+ if( $file ){
+ $sourceMap['file'] = $file;
+ }
+
+
+ // An optional source root, useful for relocating source files on a server or removing repeated values in the 'sources' entry. This value is prepended to the individual entries in the 'source' field.
+ $root = $this->getOption('sourceRoot');
+ if( $root ){
+ $sourceMap['sourceRoot'] = $root;
+ }
+
+
+ // A list of original sources used by the 'mappings' entry.
+ $sourceMap['sources'] = array();
+ foreach($this->sources as $source_uri => $source_filename){
+ $sourceMap['sources'][] = $this->normalizeFilename($source_filename);
+ }
+
+
+ // A list of symbol names used by the 'mappings' entry.
+ $sourceMap['names'] = array();
+
+ // A string with the encoded mapping data.
+ $sourceMap['mappings'] = $mappings;
+
+ if( $this->getOption('outputSourceFiles') ){
+ // An optional list of source content, useful when the 'source' can't be hosted.
+ // The contents are listed in the same order as the sources above.
+ // 'null' may be used if some original sources should be retrieved by name.
+ $sourceMap['sourcesContent'] = $this->getSourcesContent();
+ }
+
+ // less.js compat fixes
+ if( count($sourceMap['sources']) && empty($sourceMap['sourceRoot']) ){
+ unset($sourceMap['sourceRoot']);
+ }
+
+ return json_encode($sourceMap);
+ }
+
+ /**
+ * Returns the sources contents
+ *
+ * @return array|null
+ */
+ protected function getSourcesContent(){
+ if(empty($this->sources)){
+ return;
+ }
+ $content = array();
+ foreach($this->sources as $sourceFile){
+ $content[] = file_get_contents($sourceFile);
+ }
+ return $content;
+ }
+
+ /**
+ * Generates the mappings string
+ *
+ * @return string
+ */
+ public function generateMappings(){
+
+ if( !count($this->mappings) ){
+ return '';
+ }
+
+ $this->source_keys = array_flip(array_keys($this->sources));
+
+
+ // group mappings by generated line number.
+ $groupedMap = $groupedMapEncoded = array();
+ foreach($this->mappings as $m){
+ $groupedMap[$m['generated_line']][] = $m;
+ }
+ ksort($groupedMap);
+
+ $lastGeneratedLine = $lastOriginalIndex = $lastOriginalLine = $lastOriginalColumn = 0;
+
+ foreach($groupedMap as $lineNumber => $line_map){
+ while(++$lastGeneratedLine < $lineNumber){
+ $groupedMapEncoded[] = ';';
+ }
+
+ $lineMapEncoded = array();
+ $lastGeneratedColumn = 0;
+
+ foreach($line_map as $m){
+ $mapEncoded = $this->encoder->encode($m['generated_column'] - $lastGeneratedColumn);
+ $lastGeneratedColumn = $m['generated_column'];
+
+ // find the index
+ if( $m['source_file'] ){
+ $index = $this->findFileIndex($m['source_file']);
+ if( $index !== false ){
+ $mapEncoded .= $this->encoder->encode($index - $lastOriginalIndex);
+ $lastOriginalIndex = $index;
+
+ // lines are stored 0-based in SourceMap spec version 3
+ $mapEncoded .= $this->encoder->encode($m['original_line'] - 1 - $lastOriginalLine);
+ $lastOriginalLine = $m['original_line'] - 1;
+
+ $mapEncoded .= $this->encoder->encode($m['original_column'] - $lastOriginalColumn);
+ $lastOriginalColumn = $m['original_column'];
+ }
+ }
+
+ $lineMapEncoded[] = $mapEncoded;
+ }
+
+ $groupedMapEncoded[] = implode(',', $lineMapEncoded) . ';';
+ }
+
+ return rtrim(implode($groupedMapEncoded), ';');
+ }
+
+ /**
+ * Finds the index for the filename
+ *
+ * @param string $filename
+ * @return integer|false
+ */
+ protected function findFileIndex($filename){
+ return $this->source_keys[$filename];
+ }
+
+ /**
+ * fix windows paths
+ * @param string $path
+ * @return string
+ */
+ public function fixWindowsPath($path, $addEndSlash = false){
+ $slash = ($addEndSlash) ? '/' : '';
+ if( !empty($path) ){
+ $path = str_replace('\\', '/', $path);
+ $path = rtrim($path,'/') . $slash;
+ }
+
+ return $path;
+ }
+
+}
\ No newline at end of file diff --git a/lib/less.php/Version.php b/lib/less.php/Version.php new file mode 100644 index 0000000..704ec6e --- /dev/null +++ b/lib/less.php/Version.php @@ -0,0 +1,15 @@ +<?php + +/** + * Release numbers + * + * @package Less + * @subpackage version + */ +class Less_Version{ + + const version = '1.7.0.9'; // The current build number of less.php + const less_version = '1.7'; // The less.js version that this build should be compatible with + const cache_version = '170'; // The parser cache version + +} |