using System;
using System.Drawing;

// The 'windowHandle' parameter will contain the window handle for the:
//   - Active window when run by hotkey
//   - Window Location target when run by a Window Location rule
//   - TitleBar Button owner when run by a TitleBar Button
//   - Jump List owner when run from a Taskbar Jump List
//   - Currently focused window if none of these match
public static class DisplayFusionFunction
{
	public static void Run(IntPtr windowHandle)
	{		
		//exit function if we couldn't get the window
		if (windowHandle == IntPtr.Zero)
			return;
			
		//get the transparency of the window
		decimal alpha = BFS.Window.GetTransparency(windowHandle);
		
		//subtract 10% from the value. SetWindowTransparency will automatically check
		//the upper and lower bounds of the number, so no need to check it here
		alpha -= 10m;
		
		//fix floating point errors and round to the nearest 10
		alpha = Math.Round(alpha / 10) * 10m;
		
		//set the transparency
		BFS.Window.SetTransparency(windowHandle, Math.Floor(alpha));
	}
}