Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/SiteMap.cs

@@ -0,0 +1,192 @@
+//------------------------------------------------------------------------------
+// <copyright file="SiteMap.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ * Copyright (c) 2002 Microsoft Corporation
+ */
+
+namespace System.Web {
+
+    using System;
+    using System.Collections;
+    using System.ComponentModel;
+    using System.Configuration.Provider;
+    using System.Security.Permissions;
+    using System.Web.Configuration;
+    using System.Web.UI;
+    using System.Web.Hosting;
+
+    public static class SiteMap {
+
+        internal const string SectionName = "system.web/siteMap";
+
+        private static SiteMapProviderCollection _providers;
+        private static SiteMapProvider _provider;
+        private static object _lockObject = new object();
+
+        private static bool _configEnabledEvaluated;
+        private static bool _enabled;
+
+
+        public static SiteMapNode CurrentNode {
+            get {
+                return Provider.CurrentNode;
+            }
+        }
+
+        public static bool Enabled {
+            get {
+                if (!_configEnabledEvaluated) {
+                    SiteMapSection config = RuntimeConfig.GetAppConfig().SiteMap;
+                    _enabled = (config != null && config.Enabled);
+
+                    _configEnabledEvaluated = true;
+                }
+
+                return _enabled;
+            }
+        }
+
+
+        public static SiteMapProvider Provider {
+            get {
+                Initialize();
+                return _provider;
+            }
+        }
+
+
+        public static SiteMapProviderCollection Providers {
+            get {
+                Initialize();
+                return _providers;
+            }
+        }
+
+
+        public static SiteMapNode RootNode {
+            get {
+                SiteMapProvider rootProvider = Provider.RootProvider;
+                SiteMapNode rootNode = rootProvider.RootNode;
+
+                if (rootNode == null) {
+                    String name = ((ProviderBase)rootProvider).Name;
+                    throw new InvalidOperationException(SR.GetString(SR.SiteMapProvider_Invalid_RootNode, name));
+                }
+
+                return rootNode;
+
+            }
+        }
+
+
+        public static event SiteMapResolveEventHandler SiteMapResolve {
+            add {
+                Provider.SiteMapResolve += value;
+            }
+            remove {
+                Provider.SiteMapResolve -= value;
+            }
+        }
+
+        private static void Initialize() {
+            if (_providers != null)
+                return;
+
+            HttpRuntime.CheckAspNetHostingPermission(AspNetHostingPermissionLevel.Low, SR.Feature_not_supported_at_this_level);
+
+            lock (_lockObject) {
+                if (_providers != null)
+                    return;
+
+                SiteMapSection config = RuntimeConfig.GetAppConfig().SiteMap;
+                if (config == null) {
+                    // just return an empty collection so that designer will work.
+                    _providers = new SiteMapProviderCollection();
+                    return;
+                }
+
+                if (!config.Enabled)
+                    throw new InvalidOperationException(SR.GetString(SR.SiteMap_feature_disabled, SiteMap.SectionName));
+
+                // Make sure the default provider exists.
+                config.ValidateDefaultProvider();
+
+                _providers = config.ProvidersInternal;
+                _provider = _providers[config.DefaultProvider];
+                _providers.SetReadOnly();
+            }
+        }
+    }
+
+    public sealed class SiteMapProviderCollection :  ProviderCollection {
+
+        public override void Add(ProviderBase provider) {
+            if (provider == null)
+                throw new ArgumentNullException("provider");
+
+            if (!(provider is SiteMapProvider))
+                throw new ArgumentException(SR.GetString(SR.Provider_must_implement_the_interface, provider.GetType().Name, typeof(SiteMapProvider).Name), "provider");
+
+            Add((SiteMapProvider)provider);
+        }
+
+
+        public void Add(SiteMapProvider provider) {
+            if (provider == null) {
+                throw new ArgumentNullException("provider");
+            }
+
+            base.Add(provider);
+        }
+
+
+        public void AddArray(SiteMapProvider [] providerArray) {
+            if (providerArray == null) {
+                throw new ArgumentNullException("providerArray");
+            }
+
+            foreach (SiteMapProvider provider in providerArray) {
+                if (this[provider.Name] != null)
+                    throw new ArgumentException(SR.GetString(SR.SiteMapProvider_Multiple_Providers_With_Identical_Name, provider.Name));
+
+                Add(provider);
+            }
+        }
+
+
+        public new SiteMapProvider this[string name] {
+            get { 
+                return (SiteMapProvider) base[name];
+            }
+        }
+    }
+
+
+    public delegate SiteMapNode SiteMapResolveEventHandler(Object sender, SiteMapResolveEventArgs e);
+
+    public class SiteMapResolveEventArgs : EventArgs {
+        private HttpContext _context;
+        private SiteMapProvider _provider;
+
+        public SiteMapResolveEventArgs(HttpContext context, SiteMapProvider provider) {
+            _context = context;
+            _provider = provider;
+        }
+
+        public SiteMapProvider Provider {
+            get {
+                return _provider;
+            }
+        }
+
+        public HttpContext Context {
+            get {
+                return _context;
+            }
+        }
+    }
+}