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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;
}
}
}
}
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