1 files changed, 147 insertions, 0 deletions
diff --git a/lib/less.php/Tree/Unit.php b/lib/less.php/Tree/Unit.php
new file mode 100644
index 0000000..e13b100
--- /dev/null
+++ b/lib/less.php/Tree/Unit.php
@@ -0,0 +1,147 @@
+<?php
+
+/**
+ * Unit
+ *
+ * @package Less
+ * @subpackage tree
+ */
+class Less_Tree_Unit extends Less_Tree{
+
+	var $numerator = array();
+	var $denominator = array();
+	public $backupUnit;
+	public $type = 'Unit';
+
+    public function __construct($numerator = array(), $denominator = array(), $backupUnit = null ){
+		$this->numerator = $numerator;
+		$this->denominator = $denominator;
+		$this->backupUnit = $backupUnit;
+	}
+
+    public function __clone(){
+	}
+
+    /**
+     * @see Less_Tree::genCSS
+     */
+    public function genCSS( $output ){
+
+		if( $this->numerator ){
+			$output->add( $this->numerator[0] );
+		}elseif( $this->denominator ){
+			$output->add( $this->denominator[0] );
+		}elseif( !Less_Parser::$options['strictUnits'] && $this->backupUnit ){
+			$output->add( $this->backupUnit );
+			return ;
+		}
+	}
+
+    public function toString(){
+		$returnStr = implode('*',$this->numerator);
+		foreach($this->denominator as $d){
+			$returnStr .= '/'.$d;
+		}
+		return $returnStr;
+	}
+
+    public function __toString(){
+		return $this->toString();
+	}
+
+
+	/**
+	 * @param Less_Tree_Unit $other
+	 */
+    public function compare($other) {
+		return $this->is( $other->toString() ) ? 0 : -1;
+	}
+
+    public function is($unitString){
+		return $this->toString() === $unitString;
+	}
+
+    public function isLength(){
+		$css = $this->toCSS();
+		return !!preg_match('/px|em|%|in|cm|mm|pc|pt|ex/',$css);
+	}
+
+    public function isAngle() {
+		return isset( Less_Tree_UnitConversions::$angle[$this->toCSS()] );
+	}
+
+    public function isEmpty(){
+		return !$this->numerator && !$this->denominator;
+	}
+
+    public function isSingular() {
+		return count($this->numerator) <= 1 && !$this->denominator;
+	}
+
+
+    public function usedUnits(){
+		$result = array();
+
+		foreach(Less_Tree_UnitConversions::$groups as $groupName){
+			$group = Less_Tree_UnitConversions::${$groupName};
+
+			foreach($this->numerator as $atomicUnit){
+				if( isset($group[$atomicUnit]) && !isset($result[$groupName]) ){
+					$result[$groupName] = $atomicUnit;
+				}
+			}
+
+			foreach($this->denominator as $atomicUnit){
+				if( isset($group[$atomicUnit]) && !isset($result[$groupName]) ){
+					$result[$groupName] = $atomicUnit;
+				}
+			}
+		}
+
+		return $result;
+	}
+
+    public function cancel(){
+		$counter = array();
+		$backup = null;
+
+		foreach($this->numerator as $atomicUnit){
+			if( !$backup ){
+				$backup = $atomicUnit;
+			}
+			$counter[$atomicUnit] = ( isset($counter[$atomicUnit]) ? $counter[$atomicUnit] : 0) + 1;
+		}
+
+		foreach($this->denominator as $atomicUnit){
+			if( !$backup ){
+				$backup = $atomicUnit;
+			}
+			$counter[$atomicUnit] = ( isset($counter[$atomicUnit]) ? $counter[$atomicUnit] : 0) - 1;
+		}
+
+		$this->numerator = array();
+		$this->denominator = array();
+
+		foreach($counter as $atomicUnit => $count){
+			if( $count > 0 ){
+				for( $i = 0; $i < $count; $i++ ){
+					$this->numerator[] = $atomicUnit;
+				}
+			}elseif( $count < 0 ){
+				for( $i = 0; $i < -$count; $i++ ){
+					$this->denominator[] = $atomicUnit;
+				}
+			}
+		}
+
+		if( !$this->numerator && !$this->denominator && $backup ){
+			$this->backupUnit = $backup;
+		}
+
+		sort($this->numerator);
+		sort($this->denominator);
+	}
+
+
+}
+