// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.ComponentModel;
using System.ComponentModel.Design;
 
namespace System.Windows.Forms.Design;
 
/// <summary>
///  This class provides the Modifiers property to components. It is shared between
///  the document designer and the component document designer.
/// </summary>
internal partial class DesignerExtenders
{
    private IExtenderProvider[]? _providers;
    private IExtenderProviderService? _extenderService;
 
    /// <summary>
    ///  This is called by a root designer to add the correct extender providers.
    /// </summary>
    public DesignerExtenders(IExtenderProviderService ex)
    {
        _extenderService = ex;
        _providers ??=
        [
            new NameExtenderProvider(),
            new NameInheritedExtenderProvider()
        ];
 
        for (int i = 0; i < _providers.Length; i++)
        {
            ex.AddExtenderProvider(_providers[i]);
        }
    }
 
    /// <summary>
    ///  This is called at the appropriate time to remove any extra extender
    ///  providers previously added to the designer host.
    /// </summary>
    public void Dispose()
    {
        if (_extenderService is not null && _providers is not null)
        {
            for (int i = 0; i < _providers.Length; i++)
            {
                _extenderService.RemoveExtenderProvider(_providers[i]);
            }
 
            _providers = null;
            _extenderService = null;
        }
    }
}