Fixed issue #492: reset undoStack when loading shapes

Author: anx-ckreuzberger

CHANGES.txt

@@ -1,3 +1,7 @@
+v0.*.* (Upcoming release)
+ * Reset undostack when loadSnapshot is called
+ * Store moving a shape with the SelectTool in undoStack
+
 v0.5.0:
  * Support for React 15 & 16
  * Fix XSS vulnerabilities in text tool (interactive & SVG output)

src/core/LiterallyCanvas.coffee

@@ -486,7 +486,11 @@ module.exports = class LiterallyCanvas
         @setColor(k, snapshot.colors[k])
 
     if snapshot.shapes
+      # reset shapes
       @shapes = []
+      # reset undostack aswell when loading a snapshot
+      @undostack = []
+
       for shapeRepr in snapshot.shapes
         shape = JSONToShape(shapeRepr)
         @execute(new actions.AddShapeAction(this, shape)) if shape