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   1  <?php
   2  
   3  
   4  /**
   5   * Environment
   6   *
   7   * @package Less
   8   * @subpackage environment
   9   */
  10  class Less_Environment{
  11  
  12      //public $paths = array();                // option - unmodified - paths to search for imports on
  13      //public static $files = array();        // list of files that have been imported, used for import-once
  14      //public $rootpath;                        // option - rootpath to append to URL's
  15      //public static $strictImports = null;    // option -
  16      //public $insecure;                        // option - whether to allow imports from insecure ssl hosts
  17      //public $processImports;                // option - whether to process imports. if false then imports will not be imported
  18      //public $javascriptEnabled;            // option - whether JavaScript is enabled. if undefined, defaults to true
  19      //public $useFileCache;                    // browser only - whether to use the per file session cache
  20      public $currentFileInfo;                // information about the current file - for error reporting and importing and making urls relative etc.
  21  
  22      public $importMultiple = false;         // whether we are currently importing multiple copies
  23  
  24  
  25      /**
  26       * @var array
  27       */
  28      public $frames = array();
  29  
  30      /**
  31       * @var array
  32       */
  33      public $mediaBlocks = array();
  34  
  35      /**
  36       * @var array
  37       */
  38      public $mediaPath = array();
  39  
  40      public static $parensStack = 0;
  41  
  42      public static $tabLevel = 0;
  43  
  44      public static $lastRule = false;
  45  
  46      public static $_outputMap;
  47  
  48      public static $mixin_stack = 0;
  49  
  50  
  51  	public function Init(){
  52  
  53          self::$parensStack = 0;
  54          self::$tabLevel = 0;
  55          self::$lastRule = false;
  56          self::$mixin_stack = 0;
  57  
  58          if( Less_Parser::$options['compress'] ){
  59  
  60              Less_Environment::$_outputMap = array(
  61                  ','    => ',',
  62                  ': ' => ':',
  63                  ''  => '',
  64                  ' ' => ' ',
  65                  ':' => ' :',
  66                  '+' => '+',
  67                  '~' => '~',
  68                  '>' => '>',
  69                  '|' => '|',
  70                  '^' => '^',
  71                  '^^' => '^^'
  72              );
  73  
  74          }else{
  75  
  76              Less_Environment::$_outputMap = array(
  77                  ','    => ', ',
  78                  ': ' => ': ',
  79                  ''  => '',
  80                  ' ' => ' ',
  81                  ':' => ' :',
  82                  '+' => ' + ',
  83                  '~' => ' ~ ',
  84                  '>' => ' > ',
  85                  '|' => '|',
  86                  '^' => ' ^ ',
  87                  '^^' => ' ^^ '
  88              );
  89  
  90          }
  91      }
  92  
  93  
  94  	public function copyEvalEnv($frames = array() ){
  95          $new_env = new Less_Environment();
  96          $new_env->frames = $frames;
  97          return $new_env;
  98      }
  99  
 100  
 101  	public static function isMathOn(){
 102          return !Less_Parser::$options['strictMath'] || Less_Environment::$parensStack;
 103      }
 104  
 105  	public static function isPathRelative($path){
 106          return !preg_match('/^(?:[a-z-]+:|\/)/',$path);
 107      }
 108  
 109  
 110      /**
 111       * Canonicalize a path by resolving references to '/./', '/../'
 112       * Does not remove leading "../"
 113       * @param string path or url
 114       * @return string Canonicalized path
 115       *
 116       */
 117  	static function normalizePath($path){
 118  
 119          $segments = explode('/',$path);
 120          $segments = array_reverse($segments);
 121  
 122          $path = array();
 123          $path_len = 0;
 124  
 125          while( $segments ){
 126              $segment = array_pop($segments);
 127              switch( $segment ) {
 128  
 129                  case '.':
 130                  break;
 131  
 132                  case '..':
 133                      if( !$path_len || ( $path[$path_len-1] === '..') ){
 134                          $path[] = $segment;
 135                          $path_len++;
 136                      }else{
 137                          array_pop($path);
 138                          $path_len--;
 139                      }
 140                  break;
 141  
 142                  default:
 143                      $path[] = $segment;
 144                      $path_len++;
 145                  break;
 146              }
 147          }
 148  
 149          return implode('/',$path);
 150      }
 151  
 152  
 153  	public function unshiftFrame($frame){
 154          array_unshift($this->frames, $frame);
 155      }
 156  
 157  	public function shiftFrame(){
 158          return array_shift($this->frames);
 159      }
 160  
 161  }