ThemeableAttribute.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / UI / ThemeableAttribute.cs / 1305376 / ThemeableAttribute.cs
                        

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

/* 
 */ 
namespace System.Web.UI {
 
    using System;
    using System.Collections;
    using System.ComponentModel;
 
    /// 
    ///  
    ///  
    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Class)]
    public sealed class ThemeableAttribute : Attribute { 

        /// 
        /// 
        ///  
        /// 
        public static readonly ThemeableAttribute Yes = new ThemeableAttribute(true); 
 
        /// 
        ///  
        /// 
        /// 
        public static readonly ThemeableAttribute No = new ThemeableAttribute(false);
 
        /// 
        ///  
        ///  
        /// 
        public static readonly ThemeableAttribute Default = Yes; 

        private bool _themeable = false;
        private static Hashtable _themeableTypes;
 
        static ThemeableAttribute() {
            // Create a synchronized wrapper 
            _themeableTypes = Hashtable.Synchronized(new Hashtable()); 
        }
 
        /// 
        /// 
        public ThemeableAttribute(bool themeable) {
            _themeable = themeable; 
        }
 
        ///  
        ///     Indicates if the property is themeable.
        ///  
        public bool Themeable {
            get {
                return _themeable;
            } 
        }
 
        ///  
        public override bool Equals(object obj) {
            if (obj == this) { 
                return true;
            }

            ThemeableAttribute other = obj as ThemeableAttribute; 
            return (other != null) && (other.Themeable == _themeable);
        } 
 
        /// 
        public override int GetHashCode() { 
            return _themeable.GetHashCode();
        }

        ///  
        public override bool IsDefaultAttribute() {
            return this.Equals(Default); 
        } 

        public static bool IsObjectThemeable(Object instance) { 
            if (instance == null)
                throw new ArgumentNullException("instance");

            return IsTypeThemeable(instance.GetType()); 
        }
 
        public static bool IsTypeThemeable(Type type) { 
            if (type == null)
                throw new ArgumentNullException("type"); 

            object result = _themeableTypes[type];
            if (result != null) {
                return (bool)result; 
            }
 
            //System.ComponentModel.AttributeCollection attrs = TypeDescriptor.GetAttributes(type); 
            //ThemeableAttribute attr = (ThemeableAttribute)attrs[typeof(ThemeableAttribute)];
            ThemeableAttribute attr = Attribute.GetCustomAttribute(type, typeof(ThemeableAttribute)) as ThemeableAttribute; 
            result = (attr != null) && attr.Themeable;
            _themeableTypes[type] = result;

            return (bool)result; 
        }
    } 
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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