minifiers support

Quick and dirty workaround in order to get rid of ‘new’ and ‘class’
javascript reserved keywords which prevent most used compressors to
work. It would be better to change property names.

Author: massimosarchi

diffDOM.js

@@ -50,18 +50,18 @@
 
     var SubsetMapping = function SubsetMapping(a, b) {
         this.old = a;
-        this.new = b;
+        this['new'] = b;
     };
 
     SubsetMapping.prototype = {
         contains: function contains(subset) {
             if (subset.length < this.length) {
-                return subset.new >= this.new && subset.new < this.new + this.length;
+                return subset['new'] >= this['new'] && subset['new'] < this['new'] + this.length;
             }
             return false;
         },
         toString: function toString() {
-            return this.length + " element subset, first mapping: old " + this.old + " → new " + this.new;
+            return this.length + " element subset, first mapping: old " + this.old + " → new " + this['new'];
         }
     };
 
@@ -70,8 +70,8 @@
         if (el.nodeName !== '#text' && el.nodeName !== '#comment') {
             output.push(el.nodeName);
             if (el.attributes) {
-                if (el.attributes.class) {
-                    output.push(el.nodeName + '.' + el.attributes.class.replace(/ /g, '.'));
+                if (el.attributes['class']) {
+                    output.push(el.nodeName + '.' + el.attributes['class'].replace(/ /g, '.'));
                 }
                 if (el.attributes.id) {
                     output.push(el.nodeName + '#' + el.attributes.id);
@@ -214,8 +214,8 @@
                     return true;
                 }
             }
-            if (e1.attributes.class && e1.attributes.class === e2.attributes.class) {
-                var classDescriptor = e1.nodeName + '.' + e1.attributes.class.replace(/ /g, '.');
+            if (e1.attributes['class'] && e1.attributes['class'] === e2.attributes['class']) {
+                var classDescriptor = e1.nodeName + '.' + e1.attributes['class'].replace(/ /g, '.');
                 if (classDescriptor in uniqueDescriptors) {
                     return true;
                 }
@@ -354,11 +354,11 @@
         // give elements from the same subset the same group number
         stable.forEach(function(subset) {
             var i, endOld = subset.old + subset.length,
-                endNew = subset.new + subset.length;
+                endNew = subset['new'] + subset.length;
             for (i = subset.old; i < endOld; i += 1) {
                 gaps1[i] = group;
             }
-            for (i = subset.new; i < endNew; i += 1) {
+            for (i = subset['new']; i < endNew; i += 1) {
                 gaps2[i] = group;
             }
             group += 1;
@@ -386,7 +386,7 @@
             },
             markBoth = function(i) {
                 marked1[subset.old + i] = true;
-                marked2[subset.new + i] = true;
+                marked2[subset['new'] + i] = true;
             };
 
         while (subset) {
@@ -875,7 +875,7 @@
                     }
                     // group relocation
                     group = subtrees[gaps1[index2]];
-                    toGroup = Math.min(group.new, (t1.childNodes.length - group.length));
+                    toGroup = Math.min(group['new'], (t1.childNodes.length - group.length));
                     if (toGroup !== group.old) {
                         // Check whether destination nodes are different than originating ones.
                         destinationDifferent = false;