assets/js/romo/base.js in romo-0.16.2 vs assets/js/romo/base.js in romo-0.17.0

@@ -146,21 +146,23 @@
     [/%7E/g, '~']
   ];
 
   // style handling
 
+  Romo.prototype.getComputedStyle = function(node, styleName) {
+    return window.getComputedStyle(node, null).getPropertyValue(styleName);
+  }
+
   Romo.prototype.parseZIndex = function(elem) {
     // for the case where z-index is set directly on the elem
     var val = this.parseElemZIndex(elem);
     if (val !== 0) {
       return val;
     }
 
     // for the case where z-index is inherited from a parent elem
-    var parentIndexes = $.map(elem.parents(), function(item) {
-      return item; // converts the collection to an array
-    }).reduce($.proxy(function(prev, curr) {
+    var parentIndexes = this.toArray(elem.parents()).reduce($.proxy(function(prev, curr) {
       var pval = this.parseElemZIndex($(curr));
       if (pval !== 0) {
         prev.push(pval);
       }
       return prev;
@@ -168,14 +170,21 @@
     parentIndexes.push(0); // in case z-index is 'auto' all the way up
     return parentIndexes[0];
   }
 
   Romo.prototype.parseElemZIndex = function(elem) {
-    var val = parseInt(document.defaultView.getComputedStyle(elem[0], null).getPropertyValue("z-index"));
+    var val = parseInt(this.getComputedStyle(elem[0], "z-index"));
     if (!isNaN(val)) {
       return val;
     }
     return 0;
+  }
+
+  // elem handling
+
+  Romo.prototype.toArray = function(elems) {
+    // converts a collection of elements (`$()`) to an array of nodes
+    return $.map(elems, function(node){ return node; })
   }
 
   // private
 
   Romo.prototype._addEventCallback = function(name, callback) {