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