Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebParts/ProxyWebPartConnectionCollection.cs

@@ -0,0 +1,154 @@
+//------------------------------------------------------------------------------
+// <copyright file="ProxyWebPartConnectionCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls.WebParts {
+
+    using System;
+    using System.Collections;
+    using System.ComponentModel;
+    using System.Drawing.Design;
+    using System.Globalization;
+    using System.Web.Util;
+
+    [
+    Editor("System.ComponentModel.Design.CollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor))
+    ]
+    public sealed class ProxyWebPartConnectionCollection : CollectionBase {
+
+        private WebPartManager _webPartManager;
+
+        public bool IsReadOnly {
+            get {
+                if (_webPartManager != null) {
+                    return _webPartManager.StaticConnections.IsReadOnly;
+                }
+                else {
+                    // This collection is never read-only before _webPartManager is set
+                    return false;
+                }
+            }
+        }
+
+        public WebPartConnection this[int index] {
+            get {
+                return (WebPartConnection)List[index];
+            }
+            set {
+                List[index] = value;
+            }
+        }
+
+        // Returns the WebPartConnection with the specified id, performing a case-insensitive comparison.
+        // Returns null if there are no matches.
+        public WebPartConnection this[string id] {
+            // PERF: Use a hashtable for lookup, instead of a linear search
+            get {
+                foreach (WebPartConnection connection in List) {
+                    if (connection != null && String.Equals(connection.ID, id, StringComparison.OrdinalIgnoreCase)) {
+                        return connection;
+                    }
+                }
+
+                return null;
+            }
+        }
+
+        public int Add(WebPartConnection value) {
+            return List.Add(value);
+        }
+
+        private void CheckReadOnly() {
+            if (IsReadOnly) {
+                throw new InvalidOperationException(SR.GetString(SR.ProxyWebPartConnectionCollection_ReadOnly));
+            }
+        }
+
+        public bool Contains(WebPartConnection value) {
+            return List.Contains(value);
+        }
+
+        public void CopyTo(WebPartConnection[] array, int index) {
+            List.CopyTo(array, index);
+        }
+
+        public int IndexOf(WebPartConnection value) {
+            return List.IndexOf(value);
+        }
+
+        public void Insert(int index, WebPartConnection value) {
+            List.Insert(index, value);
+        }
+
+        protected override void OnClear() {
+            CheckReadOnly();
+            if (_webPartManager != null) {
+                // Remove all of the connections in this collection from the main WebPartManager
+                foreach (WebPartConnection connection in this) {
+                    _webPartManager.StaticConnections.Remove(connection);
+                }
+            }
+            base.OnClear();
+        }
+
+        protected override void OnInsert(int index, object value) {
+            CheckReadOnly();
+            if (_webPartManager != null) {
+                _webPartManager.StaticConnections.Insert(index, (WebPartConnection)value);
+            }
+            base.OnInsert(index, value);
+        }
+
+        protected override void OnRemove(int index, object value) {
+            CheckReadOnly();
+            if (_webPartManager != null) {
+                _webPartManager.StaticConnections.Remove((WebPartConnection)value);
+            }
+            base.OnRemove(index, value);
+        }
+
+        protected override void OnSet(int index, object oldValue, object newValue) {
+            CheckReadOnly();
+            if (_webPartManager != null) {
+                int webPartManagerIndex = _webPartManager.StaticConnections.IndexOf((WebPartConnection)oldValue);
+                // It is a bug if the main WebPartManager does not contain the oldValue
+                Debug.Assert(webPartManagerIndex >= 0);
+                _webPartManager.StaticConnections[webPartManagerIndex] = (WebPartConnection)newValue;
+            }
+            base.OnSet(index, oldValue, newValue);
+        }
+
+        // Validates that an object is a WebPartConnection.
+        protected override void OnValidate(object value) {
+            base.OnValidate(value);
+            if (value == null) {
+                throw new ArgumentNullException("value", SR.GetString(SR.Collection_CantAddNull));
+            }
+            if (!(value is WebPartConnection)) {
+                throw new ArgumentException(SR.GetString(SR.Collection_InvalidType, "WebPartConnection"));
+            }
+        }
+
+        public void Remove(WebPartConnection value) {
+            List.Remove(value);
+        }
+
+        internal void SetWebPartManager(WebPartManager webPartManager) {
+            // This method should only be called once in the lifetime of the ProxyWebPartConnectionCollection
+            Debug.Assert(_webPartManager == null);
+
+            Debug.Assert(webPartManager != null);
+
+            _webPartManager = webPartManager;
+
+            // When the _webPartManager is first set, add all the connections in this collection
+            // to the main WebPartManager
+            foreach (WebPartConnection connection in this) {
+                _webPartManager.StaticConnections.Add(connection);
+            }
+        }
+    }
+}
+