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//------------------------------------------------------------------------------
// <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;
}
}
}
}
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