Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/BaseParser.cs

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+//------------------------------------------------------------------------------
+// <copyright file="BaseParser.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ * Implements the ASP.NET template parser
+ *
+ * Copyright (c) 1998 Microsoft Corporation
+ */
+
+/*********************************
+
+Class hierarchy
+
+BaseParser
+    DependencyParser
+        TemplateControlDependencyParser
+            PageDependencyParser
+            UserControlDependencyParser
+            MasterPageDependencyParser
+    TemplateParser
+        BaseTemplateParser
+            TemplateControlParser
+                PageParser
+                UserControlParser
+                    MasterPageParser
+            PageThemeParser
+        ApplicationFileParser
+
+**********************************/
+
+namespace System.Web.UI {
+using System;
+using System.Collections;
+using System.Reflection;
+using System.Web.Compilation;
+using System.Web.Hosting;
+using System.Web.Util;
+using System.Text.RegularExpressions;
+using System.Web.RegularExpressions;
+using System.Security.Permissions;
+
+// Internal interface for Parser that have exteranl assembly dependency.
+internal interface IAssemblyDependencyParser {
+    ICollection AssemblyDependencies { get; }
+}
+
+
+/// <devdoc>
+///    <para>[To be supplied.]</para>
+/// </devdoc>
+public class BaseParser {
+
+    // The directory used for relative path calculations
+    private VirtualPath _baseVirtualDir;
+    internal VirtualPath BaseVirtualDir {
+        get { return _baseVirtualDir; }
+
+    }
+
+    // The virtual path to the file currently being processed
+    private VirtualPath _currentVirtualPath;
+    internal VirtualPath CurrentVirtualPath {
+        get { return _currentVirtualPath; }
+        set {
+            _currentVirtualPath = value;
+
+            // Can happen in the designer
+            if (value == null) return;
+
+            _baseVirtualDir = value.Parent;
+        }
+    }
+
+    internal string CurrentVirtualPathString {
+        get { return System.Web.VirtualPath.GetVirtualPathString(CurrentVirtualPath); }
+    }
+
+    private Regex _tagRegex;
+    // The 3.5 regex is used only when targeting 2.0/3.5 for backward compatibility (Dev10 bug 830783).
+    private readonly static Regex tagRegex35 = new TagRegex35();
+    // The 4.0 regex is used for web sites targeting 4.0 and above. 
+    private readonly static Regex tagRegex40 = new TagRegex();
+
+    internal readonly static Regex directiveRegex = new DirectiveRegex();
+    internal readonly static Regex endtagRegex = new EndTagRegex();
+    internal readonly static Regex aspCodeRegex = new AspCodeRegex();
+    internal readonly static Regex aspExprRegex = new AspExprRegex();
+    internal readonly static Regex aspEncodedExprRegex = new AspEncodedExprRegex();
+    internal readonly static Regex databindExprRegex = new DatabindExprRegex();
+    internal readonly static Regex commentRegex = new CommentRegex();
+    internal readonly static Regex includeRegex = new IncludeRegex();
+    internal readonly static Regex textRegex = new TextRegex();
+
+    // Regexes used in DetectSpecialServerTagError
+    internal readonly static Regex gtRegex = new GTRegex();
+    internal readonly static Regex ltRegex = new LTRegex();
+    internal readonly static Regex serverTagsRegex = new ServerTagsRegex();
+    internal readonly static Regex runatServerRegex = new RunatServerRegex();
+
+    /*
+     * Turns relative virtual path into absolute ones
+     */
+    internal VirtualPath ResolveVirtualPath(VirtualPath virtualPath) {
+        return VirtualPathProvider.CombineVirtualPathsInternal(CurrentVirtualPath, virtualPath);
+    }
+
+    private bool IsVersion40OrAbove() {
+        if (HostingEnvironment.IsHosted) {
+            // If we are running in a hosted environment, then we can simply check the target version.
+            return MultiTargetingUtil.IsTargetFramework40OrAbove;
+        }
+        else {
+            // Otherwise, we are in the designer, and thus should check using the type description provider.
+            // The new type TagRegex35 only exists when targeting 4.0 and above.
+            return TargetFrameworkUtil.IsSupportedType(typeof(TagRegex35));
+        }
+    }
+
+    internal Regex TagRegex {
+        get {
+            if (_tagRegex == null) {
+                _tagRegex = IsVersion40OrAbove() ? tagRegex40 : tagRegex35;
+            }
+            return _tagRegex;
+        }
+    }
+}
+
+
+}