Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/DesignTimeVisibleAttribute.cs

@@ -0,0 +1,93 @@
+//------------------------------------------------------------------------------
+// <copyright file="DesignTimeVisibleAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+namespace System.ComponentModel {
+    
+    using System;
+    using System.Security.Permissions;
+
+    /// <devdoc>
+    ///    <para>
+    ///       DesignTimeVisibileAttribute marks a component's visibility. If
+    ///       DesignTimeVisibileAttribute.Yes is present, a visual designer can show
+    ///       this component on a designer.
+    ///    </para>
+    /// </devdoc>
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface)]
+    public sealed class DesignTimeVisibleAttribute : Attribute {
+        private bool visible;
+
+        /// <devdoc>
+        ///     Creates a new DesignTimeVisibleAttribute with the visible
+        ///     property set to the given value.
+        /// </devdoc>
+        public DesignTimeVisibleAttribute(bool visible) {
+            this.visible = visible;
+        }
+        
+        /// <devdoc>
+        ///     Creates a new DesignTimeVisibleAttribute set to the default
+        ///     value of true.
+        /// </devdoc>
+        public DesignTimeVisibleAttribute() {
+        }
+
+        /// <devdoc>
+        ///     True if this component should be shown at design time, or false
+        ///     if it shouldn't.
+        /// </devdoc>
+        public bool Visible {
+            get {
+                return visible;
+            }
+        }
+
+        /// <devdoc>
+        ///     Marks a component as visible in a visual designer.
+        /// </devdoc>
+        public static readonly DesignTimeVisibleAttribute Yes = new DesignTimeVisibleAttribute(true);
+
+        /// <devdoc>
+        ///     Marks a component as not visible in a visual designer.
+        /// </devdoc>
+        public static readonly DesignTimeVisibleAttribute No = new DesignTimeVisibleAttribute(false);
+
+        /// <devdoc>
+        ///     The default visiblity. (equal to Yes.)
+        /// </devdoc>
+        public static readonly DesignTimeVisibleAttribute Default = Yes;
+        
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override bool Equals(object obj) {
+            if (obj == this) {
+                return true;
+            }
+
+            DesignTimeVisibleAttribute other = obj as DesignTimeVisibleAttribute;
+            return other != null && other.Visible == visible;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override int GetHashCode() {
+            return typeof(DesignTimeVisibleAttribute).GetHashCode() ^ (visible ? -1 : 0);
+        }
+        
+#if !SILVERLIGHT
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override bool IsDefaultAttribute() {
+            return (this.Visible == Default.Visible);
+        }
+#endif
+    }
+}