// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace System.Windows.Forms;
 
internal class ToolStripCustomIComparer : IComparer<ToolStrip>
{
    public int Compare(ToolStrip? x, ToolStrip? y)
    {
        if (IComparerHelpers.CompareReturnIfNull(x, y, out int? returnValue))
        {
            return (int)returnValue;
        }
 
        if (x.GetType() == y.GetType())
        {
            return 0; // same type
        }
 
        if (x.GetType().IsAssignableFrom(y.GetType()))
        {
            return 1;
        }
 
        if (y.GetType().IsAssignableFrom(x.GetType()))
        {
            return -1;
        }
 
        return 0; // not the same type, not in each other inheritance chain
    }
}