73 lines
1.5 KiB
PHP
Executable File
73 lines
1.5 KiB
PHP
Executable File
<?php
|
|
|
|
/**
|
|
* Condition
|
|
*
|
|
* @package Less
|
|
* @subpackage tree
|
|
*/
|
|
class Less_Tree_Condition extends Less_Tree {
|
|
|
|
public $op;
|
|
public $lvalue;
|
|
public $rvalue;
|
|
public $index;
|
|
public $negate;
|
|
public $type = 'Condition';
|
|
|
|
public function __construct( $op, $l, $r, $i = 0, $negate = false ) {
|
|
$this->op = trim( $op );
|
|
$this->lvalue = $l;
|
|
$this->rvalue = $r;
|
|
$this->index = $i;
|
|
$this->negate = $negate;
|
|
}
|
|
|
|
public function accept( $visitor ) {
|
|
$this->lvalue = $visitor->visitObj( $this->lvalue );
|
|
$this->rvalue = $visitor->visitObj( $this->rvalue );
|
|
}
|
|
|
|
public function compile( $env ) {
|
|
$a = $this->lvalue->compile( $env );
|
|
$b = $this->rvalue->compile( $env );
|
|
|
|
switch ( $this->op ) {
|
|
case 'and':
|
|
$result = $a && $b;
|
|
break;
|
|
|
|
case 'or':
|
|
$result = $a || $b;
|
|
break;
|
|
|
|
default:
|
|
if ( Less_Parser::is_method( $a, 'compare' ) ) {
|
|
$result = $a->compare( $b );
|
|
} elseif ( Less_Parser::is_method( $b, 'compare' ) ) {
|
|
$result = $b->compare( $a );
|
|
} else {
|
|
throw new Less_Exception_Compiler( 'Unable to perform comparison', null, $this->index );
|
|
}
|
|
|
|
switch ( $result ) {
|
|
case -1:
|
|
$result = $this->op === '<' || $this->op === '=<' || $this->op === '<=';
|
|
break;
|
|
|
|
case 0:
|
|
$result = $this->op === '=' || $this->op === '>=' || $this->op === '=<' || $this->op === '<=';
|
|
break;
|
|
|
|
case 1:
|
|
$result = $this->op === '>' || $this->op === '>=';
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return $this->negate ? !$result : $result;
|
|
}
|
|
|
|
}
|