fixed getNext & getPrev

build/node/Operations/Basic.js

@@ -391,12 +391,15 @@ module.exports = function() {
         i = 1;
       }
       n = this;
-      while (i > 0 && n.is_deleted && (n.next_cl != null)) {
+      while (i > 0 && (n.next_cl != null)) {
         n = n.next_cl;
         if (!n.is_deleted) {
           i--;
         }
       }
+      if (n.is_deleted) {
+        null;
+      }
       return n;
     };
 
@@ -406,13 +409,17 @@ module.exports = function() {
         i = 1;
       }
       n = this;
-      while (i > 0 && n.is_deleted && (n.prev_cl != null)) {
+      while (i > 0 && (n.prev_cl != null)) {
         n = n.prev_cl;
         if (!n.is_deleted) {
           i--;
         }
       }
-      return n;
+      if (n.is_deleted) {
+        return null;
+      } else {
+        return n;
+      }
     };
 
     Insert.prototype.applyDelete = function(o) {

lib/Operations/Basic.coffee

@@ -393,19 +393,24 @@ module.exports = ()->
 
     getNext: (i=1)->
       n = @
-      while i > 0 and n.is_deleted and n.next_cl?
+      while i > 0 and n.next_cl?
         n = n.next_cl
         if not n.is_deleted
           i--
+      if n.is_deleted
+        null
       n
 
     getPrev: (i=1)->
       n = @
-      while i > 0 and n.is_deleted and n.prev_cl?
+      while i > 0 and n.prev_cl?
         n = n.prev_cl
         if not n.is_deleted
           i--
-      n
+      if n.is_deleted
+        null
+      else
+        n
 
     #
     # set content to null and other stuff