DesignerAttribute.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / ComponentModel / DesignerAttribute.cs / 1 / DesignerAttribute.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 */ 
namespace System.ComponentModel {
    using System; 
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Diagnostics;
    using System.Globalization; 
    using System.Security.Permissions;
 
    ///  
    ///    Specifies the class to use to implement design-time services.
    ///  
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
    public sealed class DesignerAttribute : Attribute {
        private readonly string designerTypeName;
        private readonly string designerBaseTypeName; 
        private string typeId;
 
        ///  
        ///    
        ///       Initializes a new instance of the  class using the name of the type that 
        ///       provides design-time services.
        ///    
        /// 
        public DesignerAttribute(string designerTypeName) { 
            string temp = designerTypeName.ToUpper(CultureInfo.InvariantCulture);
            Debug.Assert(temp.IndexOf(".DLL") == -1, "Came across: " + designerTypeName + " . Please remove the .dll extension"); 
            this.designerTypeName = designerTypeName; 
            this.designerBaseTypeName = typeof(IDesigner).FullName;
        } 

        /// 
        ///    
        ///       Initializes a new instance of the  class using the type that provides 
        ///       design-time services.
        ///     
        ///  
        public DesignerAttribute(Type designerType) {
            this.designerTypeName = designerType.AssemblyQualifiedName; 
            this.designerBaseTypeName = typeof(IDesigner).FullName;
        }

        ///  
        ///    
        ///       Initializes a new instance of the  class using the designer type and the 
        ///       base class for the designer. 
        ///    
        ///  
        public DesignerAttribute(string designerTypeName, string designerBaseTypeName) {
            string temp = designerTypeName.ToUpper(CultureInfo.InvariantCulture);
            Debug.Assert(temp.IndexOf(".DLL") == -1, "Came across: " + designerTypeName + " . Please remove the .dll extension");
            this.designerTypeName = designerTypeName; 
            this.designerBaseTypeName = designerBaseTypeName;
        } 
 
        /// 
        ///     
        ///       Initializes a new instance of the  class, using the name of the designer
        ///       class and the base class for the designer.
        ///    
        ///  
        public DesignerAttribute(string designerTypeName, Type designerBaseType) {
            string temp = designerTypeName.ToUpper(CultureInfo.InvariantCulture); 
            Debug.Assert(temp.IndexOf(".DLL") == -1, "Came across: " + designerTypeName + " . Please remove the .dll extension"); 
            this.designerTypeName = designerTypeName;
            this.designerBaseTypeName = designerBaseType.AssemblyQualifiedName; 
        }

        /// 
        ///     
        ///       Initializes a new instance of the  class using the types of the designer and
        ///       designer base class. 
        ///     
        /// 
        public DesignerAttribute(Type designerType, Type designerBaseType) { 
            this.designerTypeName = designerType.AssemblyQualifiedName;
            this.designerBaseTypeName = designerBaseType.AssemblyQualifiedName;
        }
 
        /// 
        ///     
        ///       Gets 
        ///       the name of the base type of this designer.
        ///     
        /// 
        public string DesignerBaseTypeName {
            get {
                return designerBaseTypeName; 
            }
        } 
 
        /// 
        ///     
        ///       Gets the name of the designer type associated with this designer attribute.
        ///    
        /// 
        public string DesignerTypeName { 
            get {
                return designerTypeName; 
            } 
        }
 
        /// 
        /// 
        ///    
        ///       This defines a unique ID for this attribute type. It is used 
        ///       by filtering algorithms to identify two attributes that are
        ///       the same type. For most attributes, this just returns the 
        ///       Type instance for the attribute. DesignerAttribute overrides 
        ///       this to include the type of the designer base type.
        ///     
        /// 
        public override object TypeId {
            get {
                if (typeId == null) { 
                    string baseType = designerBaseTypeName;
                    int comma = baseType.IndexOf(','); 
                    if (comma != -1) { 
                        baseType = baseType.Substring(0, comma);
                    } 
                    typeId = GetType().FullName + baseType;
                }
                return typeId;
            } 
        }
 
        public override bool Equals(object obj) { 
            if (obj == this) {
                return true; 
            }

            DesignerAttribute other = obj as DesignerAttribute;
 
            return (other != null) && other.designerBaseTypeName == designerBaseTypeName && other.designerTypeName == designerTypeName;
        } 
 
        public override int GetHashCode() {
            return designerTypeName.GetHashCode() ^ designerBaseTypeName.GetHashCode(); 
        }
    }
}

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