<?php

/**
* 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;
}

}