1 files changed, 11 insertions, 4 deletions
diff --git a/public/assets/javascripts/rectangles/util/undo.js b/public/assets/javascripts/rectangles/util/undo.js
index 3700817..5d8593c 100644
--- a/public/assets/javascripts/rectangles/util/undo.js
+++ b/public/assets/javascripts/rectangles/util/undo.js
@@ -17,7 +17,7 @@
   UndoStack.prototype.undo = function(){
     if (this.pointer == -1) return false
     var action = this.stack[this.pointer]
-    this.types[ action.type ].undo(action)
+    this.types[ action.type ].undo(action.prev)
     this.pointer--
     return this.pointer > -1
   }
@@ -25,13 +25,20 @@
     if (this.pointer == this.stack.length-1) return false
     this.pointer++
     var action = this.stack[this.pointer]
-    this.types[ action.type ].redo(action)
+    this.types[ action.type ].redo(action.next)
     return this.pointer < this.stack.length-1
   }
   UndoStack.prototype.register = function(actionType){
-    this.types[ actionType.type ] = actionType
+  	if (actionType.length) {
+  		actionType.forEach(this.registerOne.bind(this))
+  	}
+  	else {
+  		this.registerOne(actionType)
+		}
   }
-  
+  UndoStack.prototype.registerOne = function(actionType){
+		this.types[ actionType.type ] = actionType
+	}  
   if ('window' in this) {
     window.UndoStack = new UndoStack
   }