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   1  <?php
   2  
   3  /**
   4   * Join Selector Visitor
   5   *
   6   * @package Less
   7   * @subpackage visitor
   8   */
   9  class Less_Visitor_joinSelector extends Less_Visitor{
  10  
  11      public $contexts = array( array() );
  12  
  13      /**
  14       * @param Less_Tree_Ruleset $root
  15       */
  16  	public function run( $root ){
  17          return $this->visitObj($root);
  18      }
  19  
  20      public function visitRule( $ruleNode, &$visitDeeper ){
  21          $visitDeeper = false;
  22      }
  23  
  24      public function visitMixinDefinition( $mixinDefinitionNode, &$visitDeeper ){
  25          $visitDeeper = false;
  26      }
  27  
  28      public function visitRuleset( $rulesetNode ){
  29  
  30          $paths = array();
  31  
  32          if( !$rulesetNode->root ){
  33              $selectors = array();
  34  
  35              if( $rulesetNode->selectors && $rulesetNode->selectors ){
  36                  foreach($rulesetNode->selectors as $selector){
  37                      if( $selector->getIsOutput() ){
  38                          $selectors[] = $selector;
  39                      }
  40                  }
  41              }
  42  
  43              if( !$selectors ){
  44                  $rulesetNode->selectors = null;
  45                  $rulesetNode->rules = null;
  46              }else{
  47                  $context = end($this->contexts); //$context = $this->contexts[ count($this->contexts) - 1];
  48                  $paths = $rulesetNode->joinSelectors( $context, $selectors);
  49              }
  50  
  51              $rulesetNode->paths = $paths;
  52          }
  53  
  54          $this->contexts[] = $paths; //different from less.js. Placed after joinSelectors() so that $this->contexts will get correct $paths
  55      }
  56  
  57      public function visitRulesetOut(){
  58          array_pop($this->contexts);
  59      }
  60  
  61      public function visitMedia($mediaNode) {
  62          $context = end($this->contexts); //$context = $this->contexts[ count($this->contexts) - 1];
  63  
  64          if( !count($context) || (is_object($context[0]) && $context[0]->multiMedia) ){
  65              $mediaNode->rules[0]->root = true;
  66          }
  67      }
  68  
  69  }
  70