1 files changed, 37 insertions, 0 deletions
diff --git a/lib/less.php/Tree/Negative.php b/lib/less.php/Tree/Negative.php
new file mode 100644
index 0000000..507443e
--- /dev/null
+++ b/lib/less.php/Tree/Negative.php
@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * Negative
+ *
+ * @package Less
+ * @subpackage tree
+ */
+class Less_Tree_Negative extends Less_Tree{
+
+	public $value;
+	public $type = 'Negative';
+
+    public function __construct($node){
+		$this->value = $node;
+	}
+
+	//function accept($visitor) {
+	//	$this->value = $visitor->visit($this->value);
+	//}
+
+    /**
+     * @see Less_Tree::genCSS
+     */
+    public function genCSS( $output ){
+		$output->add( '-' );
+		$this->value->genCSS( $output );
+	}
+
+    public function compile($env) {
+		if( Less_Environment::isMathOn() ){
+			$ret = new Less_Tree_Operation('*', array( new Less_Tree_Dimension(-1), $this->value ) );
+			return $ret->compile($env);
+		}
+		return new Less_Tree_Negative( $this->value->compile($env) );
+	}
+}
+\ No newline at end of file