109 lines
3.3 KiB
C#
109 lines
3.3 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="ThemeableAttribute.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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/*
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*/
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namespace System.Web.UI {
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using System;
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using System.Collections;
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using System.ComponentModel;
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/// <devdoc>
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/// <para></para>
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/// </devdoc>
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[AttributeUsage(AttributeTargets.Property | AttributeTargets.Class)]
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public sealed class ThemeableAttribute : Attribute {
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/// <internalonly/>
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/// <devdoc>
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/// <para></para>
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/// </devdoc>
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public static readonly ThemeableAttribute Yes = new ThemeableAttribute(true);
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/// <internalonly/>
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/// <devdoc>
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/// <para></para>
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/// </devdoc>
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public static readonly ThemeableAttribute No = new ThemeableAttribute(false);
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/// <internalonly/>
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/// <devdoc>
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/// <para></para>
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/// </devdoc>
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public static readonly ThemeableAttribute Default = Yes;
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private bool _themeable = false;
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private static Hashtable _themeableTypes;
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static ThemeableAttribute() {
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// Create a synchronized wrapper
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_themeableTypes = Hashtable.Synchronized(new Hashtable());
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}
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/// <devdoc>
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/// </devdoc>
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public ThemeableAttribute(bool themeable) {
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_themeable = themeable;
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}
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/// <devdoc>
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/// <para> Indicates if the property is themeable.</para>
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/// </devdoc>
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public bool Themeable {
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get {
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return _themeable;
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}
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}
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/// <internalonly/>
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public override bool Equals(object obj) {
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if (obj == this) {
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return true;
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}
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ThemeableAttribute other = obj as ThemeableAttribute;
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return (other != null) && (other.Themeable == _themeable);
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}
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/// <internalonly/>
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public override int GetHashCode() {
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return _themeable.GetHashCode();
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}
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/// <internalonly/>
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public override bool IsDefaultAttribute() {
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return this.Equals(Default);
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}
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public static bool IsObjectThemeable(Object instance) {
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if (instance == null)
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throw new ArgumentNullException("instance");
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return IsTypeThemeable(instance.GetType());
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}
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public static bool IsTypeThemeable(Type type) {
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if (type == null)
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throw new ArgumentNullException("type");
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object result = _themeableTypes[type];
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if (result != null) {
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return (bool)result;
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}
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//System.ComponentModel.AttributeCollection attrs = TypeDescriptor.GetAttributes(type);
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//ThemeableAttribute attr = (ThemeableAttribute)attrs[typeof(ThemeableAttribute)];
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ThemeableAttribute attr = Attribute.GetCustomAttribute(type, typeof(ThemeableAttribute)) as ThemeableAttribute;
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result = (attr != null) && attr.Themeable;
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_themeableTypes[type] = result;
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return (bool)result;
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}
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}
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}
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