ARCed.UI.DockPanel.SplitterDragHandler.GetSplitterOutlineBounds C# (CSharp) Method

            private Rectangle GetSplitterOutlineBounds(Point ptMouse)
            {
                Rectangle rectLimit = this.DragSource.DragLimitBounds;

                Rectangle rect = this.RectSplitter;
                if (rectLimit.Width <= 0 || rectLimit.Height <= 0)
                    return rect;

                if (this.DragSource.IsVertical)
                {
                    rect.X += ptMouse.X - StartMousePosition.X;
                    rect.Height = rectLimit.Height;
                }
                else
                {
                    rect.Y += ptMouse.Y - StartMousePosition.Y;
                    rect.Width = rectLimit.Width;
                }

                if (rect.Left < rectLimit.Left)
                    rect.X = rectLimit.X;
                if (rect.Top < rectLimit.Top)
                    rect.Y = rectLimit.Y;
                if (rect.Right > rectLimit.Right)
                    rect.X -= rect.Right - rectLimit.Right;
                if (rect.Bottom > rectLimit.Bottom)
                    rect.Y -= rect.Bottom - rectLimit.Bottom;

                return rect;
            }