[Summary view] [Print] [Text view]

   1  <?php
   2  
   3  /**
   4   * Expression
   5   *
   6   * @package Less
   7   * @subpackage tree
   8   */
   9  class Less_Tree_Expression extends Less_Tree{
  10  
  11      public $value = array();
  12      public $parens = false;
  13      public $parensInOp = false;
  14      public $type = 'Expression';
  15  
  16  	public function __construct( $value, $parens = null ){
  17          $this->value = $value;
  18          $this->parens = $parens;
  19      }
  20  
  21      public function accept( $visitor ){
  22          $this->value = $visitor->visitArray( $this->value );
  23      }
  24  
  25  	public function compile($env) {
  26  
  27          $doubleParen = false;
  28  
  29          if( $this->parens && !$this->parensInOp ){
  30              Less_Environment::$parensStack++;
  31          }
  32  
  33          $returnValue = null;
  34          if( $this->value ){
  35  
  36              $count = count($this->value);
  37  
  38              if( $count > 1 ){
  39  
  40                  $ret = array();
  41                  foreach($this->value as $e){
  42                      $ret[] = $e->compile($env);
  43                  }
  44                  $returnValue = new Less_Tree_Expression($ret);
  45  
  46              }else{
  47  
  48                  if( ($this->value[0] instanceof Less_Tree_Expression) && $this->value[0]->parens && !$this->value[0]->parensInOp ){
  49                      $doubleParen = true;
  50                  }
  51  
  52                  $returnValue = $this->value[0]->compile($env);
  53              }
  54  
  55          } else {
  56              $returnValue = $this;
  57          }
  58  
  59          if( $this->parens ){
  60              if( !$this->parensInOp ){
  61                  Less_Environment::$parensStack--;
  62  
  63              }elseif( !Less_Environment::isMathOn() && !$doubleParen ){
  64                  $returnValue = new Less_Tree_Paren($returnValue);
  65  
  66              }
  67          }
  68          return $returnValue;
  69      }
  70  
  71      /**
  72       * @see Less_Tree::genCSS
  73       */
  74      public function genCSS( $output ){
  75          $val_len = count($this->value);
  76          for( $i = 0; $i < $val_len; $i++ ){
  77              $this->value[$i]->genCSS( $output );
  78              if( $i + 1 < $val_len ){
  79                  $output->add( ' ' );
  80              }
  81          }
  82      }
  83  
  84      public function throwAwayComments() {
  85  
  86          if( is_array($this->value) ){
  87              $new_value = array();
  88              foreach($this->value as $v){
  89                  if( $v instanceof Less_Tree_Comment ){
  90                      continue;
  91                  }
  92                  $new_value[] = $v;
  93              }
  94              $this->value = $new_value;
  95          }
  96      }
  97  }