Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

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+//------------------------------------------------------------------------------
+// <copyright file="BindableAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+namespace System.ComponentModel {
+    using System;
+    using System.ComponentModel;
+    using System.Diagnostics;
+    using System.Security.Permissions;
+
+    /// <devdoc>
+    ///    <para>Specifies whether a property is appropriate to bind data
+    ///       to.</para>
+    /// </devdoc>
+    [AttributeUsage(AttributeTargets.All)]
+    public sealed class BindableAttribute : Attribute {
+        /// <devdoc>
+        ///    <para>
+        ///       Specifies that a property is appropriate to bind data to. This
+        ///    <see langword='static '/>field is read-only. 
+        ///    </para>
+        /// </devdoc>
+        public static readonly BindableAttribute Yes = new BindableAttribute(true);
+
+        /// <devdoc>
+        ///    <para>
+        ///       Specifies that a property is not appropriate to bind
+        ///       data to. This <see langword='static '/>field is read-only.
+        ///    </para>
+        /// </devdoc>
+        public static readonly BindableAttribute No = new BindableAttribute(false);
+
+        /// <devdoc>
+        ///    <para>
+        ///       Specifies the default value for the <see cref='System.ComponentModel.BindableAttribute'/>,
+        ///       which is <see cref='System.ComponentModel.BindableAttribute.No'/>. This <see langword='static '/>field is
+        ///       read-only.
+        ///    </para>
+        /// </devdoc>
+        public static readonly BindableAttribute Default = No;
+
+        private bool bindable   = false;
+        private bool isDefault  = false;
+        private BindingDirection direction;
+
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.ComponentModel.BindableAttribute'/> class.
+        ///    </para>
+        /// </devdoc>
+        public BindableAttribute(bool bindable) : this(bindable, BindingDirection.OneWay) {
+        }
+
+        /// <devdoc>
+        /// <para>
+        /// Initializes a new instance of the <see cref='System.ComponentModel.BindableAttribute'/> class.
+        /// </para>
+        /// </devdoc>
+        public BindableAttribute(bool bindable, BindingDirection direction) {
+            this.bindable = bindable;
+            this.direction = direction;
+        }
+        
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.ComponentModel.BindableAttribute'/> class.
+        ///    </para>
+        /// </devdoc>
+        public BindableAttribute(BindableSupport flags) : this(flags, BindingDirection.OneWay) {
+        }
+
+        /// <devdoc>
+        /// <para>
+        /// Initializes a new instance of the <see cref='System.ComponentModel.BindableAttribute'/> class.
+        /// </para>
+        /// </devdoc>
+        public BindableAttribute(BindableSupport flags, BindingDirection direction) {
+            this.bindable = (flags != BindableSupport.No);
+            this.isDefault = (flags == BindableSupport.Default);
+            this.direction = direction;
+        }
+        
+        /// <devdoc>
+        ///    <para>
+        ///       Gets a value indicating
+        ///       whether a property is appropriate to bind data to.
+        ///    </para>
+        /// </devdoc>
+        public bool Bindable {
+            get {
+                return bindable;
+            }
+        }
+
+        /// <devdoc>
+        /// <para>
+        /// Gets a value indicating
+        /// the direction(s) this property be bound to data.
+        /// </para>
+        /// </devdoc>
+        public BindingDirection Direction {
+            get {
+                return direction;
+            }
+        }
+
+        /// <internalonly/>
+        /// <devdoc>
+        /// </devdoc>
+        public override bool Equals(object obj) {
+            if (obj == this) {
+                return true;
+            }
+
+            if (obj != null && obj is BindableAttribute) {
+                return (((BindableAttribute)obj).Bindable == bindable);
+            }
+
+            return false;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override int GetHashCode() {
+            return bindable.GetHashCode();
+        }
+
+#if !SILVERLIGHT
+        /// <devdoc>
+        /// </devdoc>
+        /// <internalonly/>
+        public override bool IsDefaultAttribute() {
+            return (this.Equals(Default) || isDefault);
+        }
+#endif
+    }
+}