Catrobat.IDE.Core.UI.ActionsCollection.Insert C# (CSharp) Method

        public void Insert(int index, object value)
        {
            if (index == Count)
                index--;

            if (PreventIsertOfNext != null && PreventIsertOfNext == value)
            {
                PreventIsertOfNext = null;
                return;
            }

            var count = 0;

            if (value is Script) // TODO: test me
            {
                var scriptIndex = 0;

                foreach (var script in Scripts)
                {
                    if (count > index)
                    {
                        break;
                    }

                    count += script.Bricks.Count + 1;
                    scriptIndex++;
                }

                Scripts.Insert(scriptIndex, (Script) value);
                OnScriptAdded((Script) value, count + 1);
            }

            if (value is Brick)
            {
                var brickCount = 0;
                _lastInsertedBrick = (Brick) value;
                _lastInsertedIndex = index;

                if (index == 0) // Cannot insert brick before first sprite
                {
                    index = 1;
                }

                foreach (var script in Scripts)
                {
                    count++;
                    foreach (var brick in script.Bricks)
                    {
                        if (count == index)
                        {
                            script.Bricks.Insert(brickCount, (Brick) value);
                            OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, value, index));
                            return;
                        }

                        count++;
                        brickCount++;
                    }

                    if (count == index)
                    {
                        script.Bricks.Insert(brickCount, (Brick) value);
                        OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, value, index));
                        return;
                    }

                    brickCount = 0;
                }
            }
        }