some redesign for better garbage collection of elements

source/Ox.UI/js/Core/Ox.GarbageCollection.js

@@ -0,0 +1,43 @@
+// vim: et:ts=4:sw=4:sts=4:ft=javascript
+
+Ox.GarbageCollection = (function() {
+
+    var that = function() {
+        collect();
+    };
+
+    setInterval(collect, 60000);
+
+    function collect() {
+        var len = Ox.len(Ox.UI.elements);
+        Object.keys(Ox.UI.elements).forEach(function(id) {
+            if (
+                Ox.UI.elements[id]
+                && Ox.isUndefined(Ox.UI.elements[id].$element.data('oxid'))
+            ) {
+                Ox.UI.elements[id].remove();
+                delete Ox.UI.elements[id];
+            }
+        });
+        Ox.Log('GC', len, '-->', Ox.len(Ox.UI.elements));
+    }
+
+    that.debug = function() {
+        var classNames = {}, sorted = [];
+        Ox.forEach(Ox.UI.elements, function(element, id) {
+            var className = element.$element[0].className;
+            classNames[className] = (classNames[className] || 0) + 1;
+        });
+        Ox.forEach(classNames, function(count, className) {
+            sorted.push({className: className, count: count});
+        })
+        return sorted.sort(function(a, b) {
+            return a.count - b.count;
+        }).map(function(v) {
+            return v.count + ' ' + v.className
+        }).join('\n');
+    };
+
+    return that;
+
+}());