Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.Extensions/ui/ScriptControl.cs

@@ -0,0 +1,99 @@
+//------------------------------------------------------------------------------
+// <copyright file="ScriptControl.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+ 
+namespace System.Web.UI {
+    using System;
+    using System.Collections.Generic;
+    using System.ComponentModel;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Globalization;
+    using System.Web;
+    using System.Web.Resources;
+    using System.Web.UI;
+    using System.Web.UI.WebControls;
+    using System.Web.Util;
+
+    public abstract class ScriptControl : WebControl, IScriptControl {
+        private IScriptManagerInternal _scriptManager;
+        private new IPage _page;
+
+        protected ScriptControl() {
+        }
+
+        internal ScriptControl(IScriptManagerInternal scriptManager, IPage page) {
+            _scriptManager = scriptManager;
+            _page = page;
+        }
+
+        private IPage IPage {
+            get {
+                if (_page != null) {
+                    return _page;
+                }
+                else {
+                    Page page = Page;
+                    if (page == null) {
+                        throw new InvalidOperationException(AtlasWeb.Common_PageCannotBeNull);
+                    }
+                    return new PageWrapper(page);
+                }
+            }
+        }
+
+        private IScriptManagerInternal ScriptManager {
+            get {
+                if (_scriptManager == null) {
+                    Page page = Page;
+                    if (page == null) {
+                        throw new InvalidOperationException(AtlasWeb.Common_PageCannotBeNull);
+                    }
+                    _scriptManager = System.Web.UI.ScriptManager.GetCurrent(page);
+                    if (_scriptManager == null) {
+                        throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture,
+                            AtlasWeb.Common_ScriptManagerRequired, ID));
+                    }
+                }
+                return _scriptManager;
+            }
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2109:ReviewVisibleEventHandlers")]
+        protected internal override void OnPreRender(EventArgs e) {
+            base.OnPreRender(e);
+            ScriptManager.RegisterScriptControl(this);
+        }
+
+        protected internal override void Render(HtmlTextWriter writer) {
+            base.Render(writer);
+
+            // DevDiv 97460: ScriptDescriptors only render if in server form, verify to avoid silently failing.
+            IPage.VerifyRenderingInServerForm(this);
+
+            // ScriptManager cannot be found in DesignMode, so do not attempt to register scripts.
+            if (!DesignMode) {
+                ScriptManager.RegisterScriptDescriptors(this);
+            }
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate",
+            Justification = "Implementation will likely return a new collection, which is too slow for a property")]
+        protected abstract IEnumerable<ScriptDescriptor> GetScriptDescriptors();
+
+        [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate",
+            Justification = "Implementation will likely return a new collection, which is too slow for a property")]
+        protected abstract IEnumerable<ScriptReference> GetScriptReferences();
+
+        #region IScriptControl Members
+        IEnumerable<ScriptDescriptor> IScriptControl.GetScriptDescriptors() {
+            return GetScriptDescriptors();
+        }
+
+        IEnumerable<ScriptReference> IScriptControl.GetScriptReferences() {
+            return GetScriptReferences();
+        }
+        #endregion
+    }
+}