UnityEditor.ClothInspector.RectSelectionModeFromEvent C# (CSharp) Method

        private bool RectSelectionModeFromEvent()
        {
            Event current = Event.current;
            RectSelectionMode replace = RectSelectionMode.Replace;
            if (current.shift)
            {
                replace = RectSelectionMode.Add;
            }
            if (current.alt)
            {
                replace = RectSelectionMode.Substract;
            }
            if (this.m_RectSelectionMode != replace)
            {
                this.m_RectSelectionMode = replace;
                return true;
            }
            return false;
        }