ProvideExtenderAttribute.cs :  » Development » StyleCop » Microsoft » VisualStudio » Shell » C# / CSharp Open Source

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C# / CSharp Open Source » Development » StyleCop 
StyleCop » Microsoft » VisualStudio » Shell » ProvideExtenderAttribute.cs
//------------------------------------------------------------------------------
// <copyright from='2003' to='2004' company='Microsoft Corporation'>           
//  Copyright (c) Microsoft Corporation, All rights reserved.             
//  This code sample is provided "AS IS" without warranty of any kind, 
//  it is not recommended for use in a production environment.
// </copyright>                                                                
//------------------------------------------------------------------------------

namespace Microsoft.VisualStudio.Shell{

    using System;
    using System.Globalization;

    /// <summary>
    /// This attribute registers the package as an extender.  The GUID passed in determines
    /// what is being extended. The attributes on a package do not control the behavior of
    /// the package, but they can be used by registration tools to register the proper
    /// information with Visual Studio.
    /// </summary>
    [AttributeUsage(AttributeTargets.Class, AllowMultiple=true, Inherited=true)]
    public sealed class ProvideExtenderAttribute : RegistrationAttribute {

        private Guid CATID = Guid.Empty;
        private Guid extender = Guid.Empty;
        private string name;

        /// <summary>
        /// Creates a new ProvideExtenderAttribute.
        /// </summary>
        /// <param name="extendeeCatId">CatId of the element you want to extend.</param>
        /// <param name="extenderGuid">GUID of the extender.</param>
        /// <param name="extenderName">Name of the element you want to extend.</param>
        public ProvideExtenderAttribute(string extendeeCatId, string extenderGuid, string extenderName) 
        {
            CATID = new Guid(extendeeCatId);
            extender = new Guid(extenderGuid);
            name = extenderName;
        }

        /// <summary>
        /// The CatID of the element being extended.
        /// </summary>
        public Guid ExtendeeCatId {
            get {
                return CATID;
            }
        }

        /// <summary>
        /// The Guid of the extender.
        /// </summary>
        public Guid Extender {
            get {
                return extender;
            }
        }

        /// <summary>
        /// The name of the extender.
        /// </summary>
        public string ExtenderName {
            get {
                return name ;
            }
        }

        /// <summary>
        /// The reg key name of this Extender.
        /// </summary>
        private string RegKeyName 
        {
            get 
            {
                return string.Format(CultureInfo.InvariantCulture, "Extenders\\{0}\\{1}", CATID.ToString("B"), name);
            }
        }

        /// <summary>
        /// Called to register this attribute with the given context.  The context
        /// contains the location where the registration information should be placed.
        /// it also contains such as the type being registered, and path information.
        /// </summary>
        public override void Register(RegistrationContext context) 
        {
            context.Log.WriteLine(string.Format(Resources.Culture, Resources.Reg_NotifyExtender, name, CATID.ToString("B")));

            using (Key childKey = context.CreateKey(RegKeyName))
            {
                // Set default value for the Key = Extender GUID
                childKey.SetValue(string.Empty, extender.ToString("B"));
            }
        }

        /// <summary>
        /// Unregister this Extender specification.
        /// </summary>
        public override void Unregister(RegistrationContext context)
        {
            context.RemoveKey(RegKeyName);
        }
    }
}

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