1 files changed, 18 insertions, 1 deletions
diff --git a/src/Utils.ts b/src/Utils.ts
index e07d4e82d..8252ba011 100644
--- a/src/Utils.ts
+++ b/src/Utils.ts
@@ -1,11 +1,13 @@
 import v4 = require('uuid/v4');
 import v5 = require("uuid/v5");
 import { Socket } from 'socket.io';
-import { Message, Types, Transferable } from './server/Message';
+import { Message } from './server/Message';
 import { Document } from './fields/Document';
 
 export class Utils {
 
+    public static DRAG_THRESHOLD = 4;
+
     public static GenerateGuid(): string {
         return v4();
     }
@@ -87,10 +89,25 @@ export class Utils {
     }
 }
 
+export function OmitKeys(obj: any, keys: any, addKeyFunc?: (dup: any) => void) {
+    var dup: any = {};
+    for (var key in obj) {
+        if (keys.indexOf(key) === -1) {
+            dup[key] = obj[key];
+        }
+    }
+    addKeyFunc && addKeyFunc(dup);
+    return dup;
+}
+
 export function returnTrue() { return true; }
 
 export function returnFalse() { return false; }
 
+export function returnOne() { return 1; }
+
+export function returnZero() { return 0; }
+
 export function emptyFunction() { }
 
 export function emptyDocFunction(doc: Document) { }