Ticket #7848: optimized_dom_nav.diff

src/dom.js

@@ -179 +179 @@
-  },
-  
-  up: function(element, expression, index) {
+    if (arguments.length == 1) return $(element.parentNode);
-    var ancestors = $(element).ancestors();
-    return expression ? Selector.findElement(ancestors, expression, index) :
-      ancestors[index || 0];
-  },
-
+
-  down: function(element, expression, index) {
+    if (arguments.length == 1) {
+      // heavily based on immediateDescendants and should be refactored
+      if (!(element = $(element).firstChild)) return null;
+      while (element && element.nodeType != 1) element = element.nextSibling;
+      if (element) return $(element);
+      return null;
+    }
-    var descendants = $(element).descendants();
-    return expression ? Selector.findElement(descendants, expression, index) :
-      descendants[index || 0];
-  },
-
-  previous: function(element, expression, index) {
+    if (arguments.length == 1)
+      return $(Selector.handlers.previousElementSibling(element));
-    var previousSiblings = $(element).previousSiblings();
-    return expression ? Selector.findElement(previousSiblings, expression, index) :
-      previousSiblings[index || 0];
-  },
-
-  next: function(element, expression, index) {
+    if (arguments.length == 1) 
+      return $(Selector.handlers.nextElementSibling(element));
-    var nextSiblings = $(element).nextSiblings();
-    return expression ? Selector.findElement(nextSiblings, expression, index) :
-      nextSiblings[index || 0];