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[autoinstallsdev/mediawiki.git] / vendor / oyejorge / less.php / lib / Less / Tree / Condition.php

diff --git a/vendor/oyejorge/less.php/lib/Less/Tree/Condition.php b/vendor/oyejorge/less.php/lib/Less/Tree/Condition.php
new file mode 100644 (file)
index 0000000..929d33b
--- /dev/null
+++ b/vendor/oyejorge/less.php/lib/Less/Tree/Condition.php
@@ -0,0 +1,72 @@
+<?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;
+    }
+
+}