Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/HtmlControls/HtmlSource.cs

@@ -0,0 +1,63 @@
+//------------------------------------------------------------------------------
+// <copyright file="HtmlSource.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.HtmlControls {
+    using System.ComponentModel;
+    using System.Web;
+    using System.Web.UI;
+
+    /// <devdoc>
+    ///    <para>
+    ///       The <see langword='HtmlSource'/>
+    ///       class defines the methods, properties, and events
+    ///       for the HtmlSource server control.
+    ///       This class provides programmatic access on the server to
+    ///       the HTML 5 &lt;Source&gt; element.
+    ///    </para>
+    /// </devdoc>
+    [
+    ControlBuilderAttribute(typeof(HtmlEmptyTagControlBuilder))
+    ]
+    public class HtmlSource : HtmlControl {
+
+        /// <devdoc>
+        /// <para>Initializes a new instance of the <see cref='System.Web.UI.HtmlControls.HtmlSource'/> class.</para>
+        /// </devdoc>
+        public HtmlSource()
+            : base("source") {
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Gets or sets the name of and path to the video file to be displayed. This can be an absolute or relative path.
+        ///    </para>
+        /// </devdoc>
+        [
+        WebCategory("Behavior"),
+        DefaultValue(""),
+        DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
+        UrlProperty()
+        ]
+        public string Src {
+            get {
+                string s = Attributes["src"];
+                return s ?? String.Empty;
+            }
+            set {
+                Attributes["src"] = MapStringAttributeToString(value);
+            }
+        }
+
+        /*
+         * Override to process src attribute
+         */
+        protected override void RenderAttributes(HtmlTextWriter writer) {
+            PreProcessRelativeReferenceAttribute(writer, "src");
+            base.RenderAttributes(writer);
+            writer.Write(" /");
+        }
+    }
+}