Added a new function for use in fluid/responsive layouts. Takes two Dimensions in pixels and returns their ratio as a percentage. Updated unit tests to include the function.

Author: razialx

lib/less/functions.js

@@ -158,6 +158,9 @@ tree.functions = {
     argb: function (color) {
         return new(tree.Anonymous)(color.toARGB());
 
+    },
+    fluid: function(target, container){
+        return new tree.Dimension((target.value / container.value) * 100.0, '%');
     }
 };
 

test/css/functions.css

@@ -4,6 +4,7 @@
   height: undefined("self");
   border-width: 5;
   variable: 11;
+  padding: 5%;
 }
 #built-in {
   escaped: -Some::weird(#thing, y);

test/less/functions.less

@@ -5,6 +5,7 @@
   height: undefined("self");
   border-width: add(2, 3);
   variable: increment(@var);
+  padding: fluid(10px, 200px);
 }
 
 #built-in {