<?php
/**
* 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;
}
}
}