System.Windows.Forms.XplatUIX11.TranslateWindowSizeToXWindowSize C# (CSharp) Method

		internal static Size TranslateWindowSizeToXWindowSize (CreateParams cp, Size size)
		{
			/* 
			 * If this is a form with no window manager, X is handling all the border and caption painting
			 * so remove that from the area (since the area we set of the window here is the part of the window 
			 * we're painting in only)
			 */
			Form form = cp.control as Form;
			if (form != null && (form.window_manager == null && !cp.IsSet (WindowExStyles.WS_EX_TOOLWINDOW))) {
				Hwnd.Borders borders = Hwnd.GetBorders (cp, null);
				Size xrect = size;

				xrect.Width -= borders.left + borders.right;
				xrect.Height -= borders.top + borders.bottom;

				size = xrect;
			}
			if (size.Height == 0)
				size.Height = 1;
			if (size.Width == 0)
				size.Width = 1;
			return size;
		}