Add folding for Html in .cshtml Razor files.

src/AddIns/BackendBindings/AspNet.Mvc/Project/AspNet.Mvc.addin

@@ -91,5 +91,9 @@
 			id="WebForms"
 			class="ICSharpCode.AspNet.Mvc.Folding.WebFormsLanguageBinding"
 			extensions=".aspx;.ascx;.master;.html;.htm" />
+		<LanguageBinding
+			id="CSharp.Razor"
+			class="ICSharpCode.AspNet.Mvc.Folding.CSharpRazorLanguageBinding"
+			extensions=".cshtml" />
 	</Path>
 </AddIn>

src/AddIns/BackendBindings/AspNet.Mvc/Project/AspNet.Mvc.csproj

@@ -36,6 +36,7 @@
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
     <Reference Include="System" />
+    <Reference Include="System.Web.Razor" />
     <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Xaml">
       <RequiredTargetFramework>4.0</RequiredTargetFramework>
@@ -116,14 +117,25 @@
     <Compile Include="Src\DelegateCommand.cs" />
     <Compile Include="Src\FileSystem.cs" />
     <Compile Include="Src\Folding\CharacterReader.cs" />
+    <Compile Include="Src\Folding\HtmlFoldParser.cs" />
+    <Compile Include="Src\Folding\RazorFoldGeneratorFactory.cs" />
+    <Compile Include="Src\Folding\RazorHtmlFoldParser.cs" />
+    <Compile Include="Src\Folding\CSharpRazorLanguageBinding.cs" />
     <Compile Include="Src\Folding\FoldGenerationTimer.cs" />
     <Compile Include="Src\Folding\HtmlElementFold.cs" />
+    <Compile Include="Src\Folding\HtmlLanguageBinding.cs" />
+    <Compile Include="Src\Folding\HtmlReader.cs" />
     <Compile Include="Src\Folding\IFoldGenerationTimer.cs" />
     <Compile Include="Src\Folding\IFoldParser.cs" />
+    <Compile Include="Src\Folding\IHtmlReaderFactory.cs" />
     <Compile Include="Src\Folding\ITextEditorWithParseInformationFolding.cs" />
     <Compile Include="Src\Folding\ITextEditorWithParseInformationFoldingFactory.cs" />
     <Compile Include="Src\Folding\IFoldGenerator.cs" />
-    <Compile Include="Src\Folding\IWebFormsFoldGeneratorFactory.cs" />
+    <Compile Include="Src\Folding\IFoldGeneratorFactory.cs" />
+    <Compile Include="Src\Folding\RazorHtmlReader.cs" />
+    <Compile Include="Src\Folding\RazorHtmlReaderFactory.cs" />
+    <Compile Include="Src\Folding\RazorHtmlSpans.cs" />
+    <Compile Include="Src\Folding\RazorMarkupCharacterReader.cs" />
     <Compile Include="Src\Folding\ScheduledFoldGenerator.cs" />
     <Compile Include="Src\Folding\TextEditorWithParseInformationFolding.cs" />
     <Compile Include="Src\Folding\TextEditorWithParseInformationFoldingFactory.cs" />
@@ -132,6 +144,7 @@
     <Compile Include="Src\Folding\WebFormsHtmlFoldParser.cs" />
     <Compile Include="Src\Folding\HtmlNode.cs" />
     <Compile Include="Src\Folding\SimpleWebFormsHtmlReader.cs" />
+    <Compile Include="Src\Folding\WebFormsHtmlReaderFactory.cs" />
     <Compile Include="Src\Folding\WebFormsLanguageBinding.cs" />
     <Compile Include="Src\IAddMvcItemToProjectView.cs" />
     <Compile Include="Src\IFileSystem.cs" />

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/CSharpRazorLanguageBinding.cs

@@ -0,0 +1,17 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class CSharpRazorLanguageBinding : HtmlLanguageBinding
+	{
+		public CSharpRazorLanguageBinding()
+			: base(
+				new TextEditorWithParseInformationFoldingFactory(),
+				new RazorFoldGeneratorFactory("cshtml"))
+		{
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/CharacterReader.cs

@@ -9,6 +9,7 @@ namespace ICSharpCode.AspNet.Mvc.Folding
 	public class CharacterReader
 	{
 		public const int EndOfCharacters = -1;
+		public const int BeforeStartOffset = -1;
 		
 		TextReader reader;
 		
@@ -20,12 +21,13 @@ namespace ICSharpCode.AspNet.Mvc.Folding
 		public CharacterReader(TextReader reader)
 		{
 			this.reader = reader;
+			this.CurrentCharacterOffset = BeforeStartOffset;
 		}
 		
 		public bool Read()
 		{
 			CurrentCharacter = reader.Read();
-			Offset++;
+			CurrentCharacterOffset++;
 			return HasMoreCharactersToRead();
 		}
 		
@@ -34,10 +36,10 @@ namespace ICSharpCode.AspNet.Mvc.Folding
 			return CurrentCharacter != EndOfCharacters;
 		}
 		
-		public int Offset { get; private set; }
+		public int CurrentCharacterOffset { get; private set; }
 		
-		public int PreviousOffset {
-			get { return Offset - 1; }
+		public int NextCharacterOffset {
+			get { return CurrentCharacterOffset + 1; }
 		}
 		
 		public int CurrentCharacter { get; private set; }
@@ -81,5 +83,12 @@ namespace ICSharpCode.AspNet.Mvc.Folding
 		{
 			return CurrentCharacter == '\'';
 		}
+		
+		public void ReadCharacters(int howMany)
+		{
+			for (int i = 0; i < howMany; ++i) {
+				Read();
+			}
+		}
 	}
 }

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/HtmlFoldParser.cs

@@ -0,0 +1,77 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using ICSharpCode.AvalonEdit.Folding;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class HtmlFoldParser : IFoldParser
+	{
+		List<HtmlElementFold> folds = new List<HtmlElementFold>();
+		Stack<HtmlElementFold> foldStack = new Stack<HtmlElementFold>();
+		HtmlReader htmlReader;
+		IHtmlReaderFactory htmlReaderFactory;
+		
+		public HtmlFoldParser(IHtmlReaderFactory htmlReaderFactory)
+		{
+			this.htmlReaderFactory = htmlReaderFactory;
+		}
+		
+		public IEnumerable<NewFolding> GetFolds(string html)
+		{
+			ClearPreviousFolds();
+			htmlReader = CreateHtmlReader(html);
+			while (htmlReader.Read()) {
+				if (htmlReader.IsEmptyElement) {
+					// No folds for empty elements.
+				} else if (htmlReader.IsEndElement) {
+					AddFoldForCompletedElement();
+				} else {
+					SaveFoldStartOnStack();
+				}
+			}
+			SortFoldsByStartOffset();
+			return folds;
+		}
+		
+		void ClearPreviousFolds()
+		{
+			folds.Clear();
+		}
+		
+		HtmlReader CreateHtmlReader(string html)
+		{
+			return htmlReaderFactory.CreateHtmlReader(html);
+		}
+		
+		void SaveFoldStartOnStack()
+		{
+			var fold = new HtmlElementFold() {
+				ElementName = htmlReader.Value,
+				StartOffset = htmlReader.Offset
+			};
+			foldStack.Push(fold);
+		}
+		
+		void AddFoldForCompletedElement()
+		{
+			if (foldStack.Any()) {
+				var fold = foldStack.Pop();
+				if (fold.ElementName == htmlReader.Value) {
+					fold.EndOffset = htmlReader.EndOffset;
+					folds.Add(fold);
+				} else {
+					AddFoldForCompletedElement();
+				}
+			}
+		}
+		
+		void SortFoldsByStartOffset()
+		{
+			folds.Sort((fold1, fold2) => fold1.StartOffset.CompareTo(fold2.StartOffset));
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/HtmlLanguageBinding.cs

@@ -0,0 +1,48 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using ICSharpCode.SharpDevelop;
+using ICSharpCode.SharpDevelop.Dom;
+using ICSharpCode.SharpDevelop.Editor;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class HtmlLanguageBinding : DefaultLanguageBinding
+	{
+		ITextEditorWithParseInformationFoldingFactory textEditorFactory;
+		IFoldGeneratorFactory foldGeneratorFactory;
+		IFoldGenerator foldGenerator;
+		
+		public HtmlLanguageBinding(
+			ITextEditorWithParseInformationFoldingFactory textEditorFactory,
+			IFoldGeneratorFactory foldGeneratorFactory)
+		{
+			this.textEditorFactory = textEditorFactory;
+			this.foldGeneratorFactory = foldGeneratorFactory;
+		}
+		
+		public override IFormattingStrategy FormattingStrategy {
+			get { return new DefaultFormattingStrategy(); }
+		}
+		
+		public override LanguageProperties Properties {
+			get { return LanguageProperties.None; }
+		}
+		
+		public override void Attach(ITextEditor editor)
+		{
+			Attach(textEditorFactory.CreateTextEditor(editor));
+		}
+		
+		void Attach(ITextEditorWithParseInformationFolding editor)
+		{
+			foldGenerator = foldGeneratorFactory.CreateFoldGenerator(editor);
+		}
+		
+		public override void Detach()
+		{
+			foldGenerator.Dispose();
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/HtmlReader.cs

@@ -0,0 +1,117 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.IO;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class HtmlReader
+	{
+		CharacterReader reader;
+		HtmlNode currentNode = new HtmlNode();
+		
+		public HtmlReader(string html)
+			: this(new StringReader(html))
+		{
+		}
+		
+		public HtmlReader(TextReader reader)
+			: this(new CharacterReader(reader))
+		{
+		}
+		
+		public HtmlReader(CharacterReader reader)
+		{
+			this.reader = reader;
+		}
+		
+		public string Value {
+			get { return currentNode.Value; }
+		}
+		
+		public int Offset { get; private set; }
+		public int Length { get; private set; }
+		
+		public int EndOffset {
+			get { return Offset + Length; }
+		}
+		
+		public bool IsEmptyElement { get; private set; }
+		public bool IsEndElement { get; private set; }
+		
+		public bool IsStartElement {
+			get { return !IsEndElement; }
+		}
+		
+		public bool Read()
+		{
+			while (ReadNextCharacter()) {
+				if (!IsHtml()) {
+					// Skip character
+				} else if (IsElementStartCharacter()) {
+					currentNode = new HtmlNode();
+					IsEndElement = reader.IsNextCharacterForwardSlash();
+					IsEmptyElement = false;
+					Offset = reader.CurrentCharacterOffset;
+				} else if (IsElementEndCharacter()) {
+					Length = reader.NextCharacterOffset - Offset;
+					return true;
+				} else if (reader.IsForwardSlash()) {
+					IsEmptyElement = !IsEndElement;
+				} else if (IsElementNameCharacter()) {
+					currentNode.Append(reader.CurrentCharacter);
+				} else if (reader.IsDoubleQuote()) {
+					ReadDoubleQuotedString();
+				} else if (reader.IsSingleQuote()) {
+					ReadSingleQuotedString();
+				}
+			}
+			return false;
+		}
+		
+		protected virtual bool IsHtml()
+		{
+			return true;
+		}
+		
+		bool ReadNextCharacter()
+		{
+			return reader.Read();
+		}
+		
+		bool IsElementStartCharacter()
+		{
+			return reader.IsLessThanSign();
+		}
+		
+		bool IsElementEndCharacter()
+		{
+			return reader.IsGreaterThanSign();
+		}
+		
+		bool IsElementNameCharacter()
+		{
+			return reader.IsLetterOrDigit() || reader.IsSpace();
+		}
+		
+		void ReadDoubleQuotedString()
+		{
+			ReadUntil(() => reader.IsDoubleQuote());
+		}
+		
+		void ReadUntil(Func<bool> match)
+		{
+			while (ReadNextCharacter()) {
+				if (match()) {
+					return;
+				}
+			}
+		}
+		
+		void ReadSingleQuotedString()
+		{
+			ReadUntil(() => reader.IsSingleQuote());
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/IFoldGeneratorFactory.cs

@@ -5,7 +5,7 @@ using System;
 
 namespace ICSharpCode.AspNet.Mvc.Folding
 {
-	public interface IWebFormsFoldGeneratorFactory
+	public interface IFoldGeneratorFactory
 	{
 		IFoldGenerator CreateFoldGenerator(ITextEditorWithParseInformationFolding textEditor);
 	}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/IHtmlReaderFactory.cs

@@ -0,0 +1,12 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public interface IHtmlReaderFactory
+	{
+		HtmlReader CreateHtmlReader(string html);
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/RazorFoldGeneratorFactory.cs

@@ -0,0 +1,23 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class RazorFoldGeneratorFactory : IFoldGeneratorFactory
+	{
+		public RazorFoldGeneratorFactory(string extension)
+		{
+			this.Extension = extension;
+		}
+		
+		string Extension { get; set; }
+		
+		public IFoldGenerator CreateFoldGenerator(ITextEditorWithParseInformationFolding textEditor)
+		{
+			return new ScheduledFoldGenerator(
+				new FoldGenerator(textEditor, new RazorHtmlFoldParser(Extension)));
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/RazorHtmlFoldParser.cs

@@ -0,0 +1,22 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Collections.Generic;
+using ICSharpCode.AvalonEdit.Folding;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class RazorHtmlFoldParser : HtmlFoldParser
+	{
+		public RazorHtmlFoldParser(string extension)
+			: this(new RazorHtmlReaderFactory(extension))
+		{
+		}
+		
+		public RazorHtmlFoldParser(RazorHtmlReaderFactory htmlReaderFactory)
+			: base(htmlReaderFactory)
+		{
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/RazorHtmlReader.cs

@@ -0,0 +1,29 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.IO;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class RazorHtmlReader : HtmlReader
+	{
+		RazorMarkupCharacterReader reader;
+		
+		public RazorHtmlReader(string html)
+			: this(new RazorMarkupCharacterReader(html))
+		{
+		}
+		
+		public RazorHtmlReader(RazorMarkupCharacterReader reader)
+			: base(reader)
+		{
+			this.reader = reader;
+		}
+		
+		protected override bool IsHtml()
+		{
+			return reader.IsHtml;
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/RazorHtmlReaderFactory.cs

@@ -0,0 +1,19 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class RazorHtmlReaderFactory : IHtmlReaderFactory
+	{
+		public RazorHtmlReaderFactory(string extension)
+		{
+		}
+		
+		public HtmlReader CreateHtmlReader(string html)
+		{
+			return new RazorHtmlReader(html);
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/RazorHtmlSpans.cs

@@ -0,0 +1,55 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Web.Razor;
+using System.Web.Razor.Parser.SyntaxTree;
+using System.Web.Razor.Text;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class RazorHtmlSpans
+	{
+		List<Span> spans;
+		
+		public RazorHtmlSpans(string html)
+		{
+			ReadHtmlSpans(html);
+		}
+		
+		void ReadHtmlSpans(string html)
+		{
+			RazorEngineHost razorEngineHost = new RazorEngineHost(RazorCodeLanguage.GetLanguageByExtension(".cshtml"));
+			RazorTemplateEngine engine = new RazorTemplateEngine(razorEngineHost);
+			ParserResults results = engine.ParseTemplate(new StringReader(html));
+			spans = new List<Span>(results.Document.Flatten());
+			spans.RemoveAll(span => span.Kind != SpanKind.Markup);
+		}
+		
+		public bool IsHtml(int offset)
+		{
+			if (offset >= 0) {
+				return HtmlSpansContainOffset(offset);
+			}
+			return true;
+		}
+		
+		bool HtmlSpansContainOffset(int offset)
+		{
+			foreach (Span span in spans) {
+				if (IsInSpan(span, offset)) {
+					return true;
+				}
+			}
+			return false;
+		}
+		
+		bool IsInSpan(Span span, int offset)
+		{
+			int spanOffset = span.Start.AbsoluteIndex;
+			return (offset >= spanOffset) && (offset < spanOffset + span.Length);
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/RazorMarkupCharacterReader.cs

@@ -0,0 +1,22 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class RazorMarkupCharacterReader : CharacterReader
+	{
+		RazorHtmlSpans htmlSpans;
+		
+		public RazorMarkupCharacterReader(string html)
+			: base(html)
+		{
+			htmlSpans = new RazorHtmlSpans(html);
+		}
+		
+		public bool IsHtml {
+			get { return htmlSpans.IsHtml(CurrentCharacterOffset); }
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/SimpleWebFormsHtmlReader.cs

@@ -7,105 +7,16 @@ using System.Text;
 
 namespace ICSharpCode.AspNet.Mvc.Folding
 {
-	public class SimpleWebFormsHtmlReader
+	public class SimpleWebFormsHtmlReader : HtmlReader
 	{
-		CharacterReader reader;
-		HtmlNode currentNode = new HtmlNode();
-		
 		public SimpleWebFormsHtmlReader(string html)
-			: this(new StringReader(html))
-		{
-		}
-		
-		public SimpleWebFormsHtmlReader(TextReader reader)
-			: this(new CharacterReader(reader))
+			: this(new CharacterReader(html))
 		{
 		}
 		
 		public SimpleWebFormsHtmlReader(CharacterReader reader)
+			: base(reader)
 		{
-			this.reader = reader;
-		}
-		
-		public string Value {
-			get { return currentNode.Value; }
-		}
-		
-		public int Offset { get; private set; }
-		public int Length { get; private set; }
-		
-		public int EndOffset {
-			get { return Offset + Length; }
-		}
-		
-		public bool IsEmptyElement { get; private set; }
-		public bool IsEndElement { get; private set; }
-		
-		public bool IsStartElement {
-			get { return !IsEndElement; }
-		}
-		
-		public bool Read()
-		{
-			while (ReadNextCharacter()) {
-				if (IsElementStartCharacter()) {
-					currentNode = new HtmlNode();
-					IsEndElement = reader.IsNextCharacterForwardSlash();
-					IsEmptyElement = false;
-					Offset = reader.PreviousOffset;
-				} else if (IsElementEndCharacter()) {
-					Length = reader.Offset - Offset;
-					return true;
-				} else if (reader.IsForwardSlash()) {
-					IsEmptyElement = !IsEndElement;
-				} else if (IsElementNameCharacter()) {
-					currentNode.Append(reader.CurrentCharacter);
-				} else if (reader.IsDoubleQuote()) {
-					ReadDoubleQuotedString();
-				} else if (reader.IsSingleQuote()) {
-					ReadSingleQuotedString();
-				}
-			}
-			return false;
-		}
-		
-		bool ReadNextCharacter()
-		{
-			return reader.Read();
-		}
-		
-		bool IsElementStartCharacter()
-		{
-			return reader.IsLessThanSign();
-		}
-		
-		bool IsElementEndCharacter()
-		{
-			return reader.IsGreaterThanSign();
-		}
-		
-		bool IsElementNameCharacter()
-		{
-			return reader.IsLetterOrDigit() || reader.IsSpace();
-		}
-		
-		void ReadDoubleQuotedString()
-		{
-			ReadUntil(() => reader.IsDoubleQuote());
-		}
-		
-		void ReadUntil(Func<bool> match)
-		{
-			while (ReadNextCharacter()) {
-				if (match()) {
-					return;
-				}
-			}
-		}
-		
-		void ReadSingleQuotedString()
-		{
-			ReadUntil(() => reader.IsSingleQuote());
 		}
 	}
 }

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/WebFormsFoldGeneratorFactory.cs

@@ -5,7 +5,7 @@ using System;
 
 namespace ICSharpCode.AspNet.Mvc.Folding
 {
-	public class WebFormsFoldGeneratorFactory : IWebFormsFoldGeneratorFactory
+	public class WebFormsFoldGeneratorFactory : IFoldGeneratorFactory
 	{
 		public IFoldGenerator CreateFoldGenerator(ITextEditorWithParseInformationFolding textEditor)
 		{

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/WebFormsHtmlFoldParser.cs

@@ -2,65 +2,19 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using ICSharpCode.AvalonEdit.Folding;
 
 namespace ICSharpCode.AspNet.Mvc.Folding
 {
-	public class WebFormsHtmlFoldParser : IFoldParser
+	public class WebFormsHtmlFoldParser : HtmlFoldParser
 	{
-		List<HtmlElementFold> folds = new List<HtmlElementFold>();
-		Stack<HtmlElementFold> foldStack = new Stack<HtmlElementFold>();
-		SimpleWebFormsHtmlReader htmlReader;
-		
-		public IEnumerable<NewFolding> GetFolds(string html)
-		{
-			ClearPreviousFolds();
-			htmlReader = new SimpleWebFormsHtmlReader(html);
-			while (htmlReader.Read()) {
-				if (htmlReader.IsEmptyElement) {
-					// No folds for empty elements.
-				} else if (htmlReader.IsEndElement) {
-					AddFoldForCompletedElement();
-				} else {
-					SaveFoldStartOnStack();
-				}
-			}
-			SortFoldsByStartOffset();
-			return folds;
-		}
-		
-		void ClearPreviousFolds()
-		{
-			folds.Clear();
-		}
-		
-		void SaveFoldStartOnStack()
-		{
-			var fold = new HtmlElementFold() {
-				ElementName = htmlReader.Value,
-				StartOffset = htmlReader.Offset
-			};
-			foldStack.Push(fold);
-		}
-		
-		void AddFoldForCompletedElement()
+		public WebFormsHtmlFoldParser(IHtmlReaderFactory htmlReaderFactory)
+			: base(htmlReaderFactory)
 		{
-			if (foldStack.Any()) {
-				var fold = foldStack.Pop();
-				if (fold.ElementName == htmlReader.Value) {
-					fold.EndOffset = htmlReader.EndOffset;
-					folds.Add(fold);
-				} else {
-					AddFoldForCompletedElement();
-				}
-			}
 		}
 		
-		void SortFoldsByStartOffset()
+		public WebFormsHtmlFoldParser()
+			: this(new WebFormsHtmlReaderFactory())
 		{
-			folds.Sort((fold1, fold2) => fold1.StartOffset.CompareTo(fold2.StartOffset));
 		}
 	}
 }

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/WebFormsHtmlReaderFactory.cs

@@ -0,0 +1,15 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+
+namespace ICSharpCode.AspNet.Mvc.Folding
+{
+	public class WebFormsHtmlReaderFactory : IHtmlReaderFactory
+	{
+		public HtmlReader CreateHtmlReader(string html)
+		{
+			return new SimpleWebFormsHtmlReader(html);
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Project/Src/Folding/WebFormsLanguageBinding.cs

@@ -3,19 +3,13 @@
 
 using System;
 using ICSharpCode.SharpDevelop;
-using ICSharpCode.SharpDevelop.Dom;
-using ICSharpCode.SharpDevelop.Editor;
 
 namespace ICSharpCode.AspNet.Mvc.Folding
 {
-	public class WebFormsLanguageBinding : DefaultLanguageBinding
+	public class WebFormsLanguageBinding : HtmlLanguageBinding
 	{
-		ITextEditorWithParseInformationFoldingFactory textEditorFactory;
-		IWebFormsFoldGeneratorFactory foldGeneratorFactory;
-		IFoldGenerator foldGenerator;
-		
 		public WebFormsLanguageBinding()
-			: this(
+			: base(
 				new TextEditorWithParseInformationFoldingFactory(),
 				new WebFormsFoldGeneratorFactory())
 		{
@@ -23,33 +17,9 @@ namespace ICSharpCode.AspNet.Mvc.Folding
 		
 		public WebFormsLanguageBinding(
 			ITextEditorWithParseInformationFoldingFactory textEditorFactory,
-			IWebFormsFoldGeneratorFactory foldGeneratorFactory)
-		{
-			this.textEditorFactory = textEditorFactory;
-			this.foldGeneratorFactory = foldGeneratorFactory;
-		}
-		
-		public override IFormattingStrategy FormattingStrategy {
-			get { return new DefaultFormattingStrategy(); }
-		}
-		
-		public override LanguageProperties Properties {
-			get { return LanguageProperties.None; }
-		}
-		
-		public override void Attach(ITextEditor editor)
-		{
-			Attach(textEditorFactory.CreateTextEditor(editor));
-		}
-		
-		void Attach(ITextEditorWithParseInformationFolding editor)
-		{
-			foldGenerator = foldGeneratorFactory.CreateFoldGenerator(editor);
-		}
-		
-		public override void Detach()
+			IFoldGeneratorFactory foldGeneratorFactory)
+			: base(textEditorFactory, foldGeneratorFactory)
 		{
-			foldGenerator.Dispose();
 		}
 	}
 }

src/AddIns/BackendBindings/AspNet.Mvc/Test/AspNet.Mvc.Tests.csproj

@@ -112,7 +112,11 @@
     <Compile Include="Src\CodeTemplates\RazorCSharpEditViewTemplateTests.cs" />
     <Compile Include="Src\CodeTemplates\RazorCSharpEmptyViewTemplateTests.cs" />
     <Compile Include="Src\CodeTemplates\RazorCSharpListViewTemplateTests.cs" />
+    <Compile Include="Src\Folding\CharacterReaderTests.cs" />
+    <Compile Include="Src\Folding\RazorHtmlFoldParserTests.cs" />
     <Compile Include="Src\Folding\HtmlElementFoldTests.cs" />
+    <Compile Include="Src\Folding\RazorHtmlReaderTests.cs" />
+    <Compile Include="Src\Folding\RazorMarkupCharacterReaderTests.cs" />
     <Compile Include="Src\Folding\ScheduledFoldGeneratorTests.cs" />
     <Compile Include="Src\Folding\FoldGeneratorTests.cs" />
     <Compile Include="Src\Folding\WebFormsHtmlFoldParserTests.cs" />

src/AddIns/BackendBindings/AspNet.Mvc/Test/Src/Folding/CharacterReaderTests.cs

@@ -0,0 +1,30 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using ICSharpCode.AspNet.Mvc.Folding;
+using NUnit.Framework;
+
+namespace AspNet.Mvc.Tests.Folding
+{
+	[TestFixture]
+	public class CharacterReaderTests
+	{
+		CharacterReader reader;
+		
+		void CreateReader(string html)
+		{
+			reader = new CharacterReader(html);
+		}
+		
+		[Test]
+		public void ReadCharacters_ReadTwoCharacters_SecondCharacterIsCurrentCharacter()
+		{
+			CreateReader("12345");
+			
+			reader.ReadCharacters(2);
+			
+			Assert.AreEqual('2', reader.CurrentCharacter);
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Test/Src/Folding/RazorHtmlFoldParserTests.cs

@@ -0,0 +1,76 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using ICSharpCode.AspNet.Mvc.Folding;
+using ICSharpCode.AvalonEdit.Folding;
+using NUnit.Framework;
+
+namespace AspNet.Mvc.Tests.Folding
+{
+	[TestFixture]
+	public class RazorHtmlFoldParserTests
+	{
+		RazorHtmlFoldParser parser;
+		List<NewFolding> folds;
+		
+		void CreateCSharpParser()
+		{
+			parser = new RazorHtmlFoldParser("cshtml");
+		}
+		
+		void GetFolds(string text)
+		{
+			folds = parser.GetFolds(text).ToList();
+		}
+		
+		[Test]
+		public void GetFolds_ParagraphStartAndEndTag_ReturnsOneFoldForParagraphTag()
+		{
+			CreateCSharpParser();
+			
+			string text =
+				"<p>\r\n" +
+				"</p>";
+			
+			GetFolds(text);
+			
+			var expectedFolds = new HtmlElementFold[] {
+				new HtmlElementFold() {
+					ElementName = "p",
+					StartOffset = 0,
+					EndOffset = 9
+				}
+			};
+			
+			CollectionAssert.AreEqual(expectedFolds, folds);
+		}
+		
+		[Test]
+		public void GetFolds_EndAnchorTagInsideIfStatement_ReturnsOneFoldForParagraphTagAndNotAnchorTag()
+		{
+			CreateCSharpParser();
+			
+			string text =
+				"@if (i<a || b>i) {\r\n" +
+				"    </a>\r\n" +
+				"    <p></p>\r\n" +
+				"}\r\n";
+
+			GetFolds(text);
+			
+			var expectedFolds = new HtmlElementFold[] {
+				new HtmlElementFold() {
+					ElementName = "p",
+					StartOffset = 34,
+					EndOffset = 41
+				}
+			};
+			
+			CollectionAssert.AreEqual(expectedFolds, folds);
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Test/Src/Folding/RazorHtmlReaderTests.cs

@@ -0,0 +1,38 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using ICSharpCode.AspNet.Mvc.Folding;
+using NUnit.Framework;
+
+namespace AspNet.Mvc.Tests.Folding
+{
+	[TestFixture]
+	public class RazorHtmlReaderTests
+	{
+		RazorHtmlReader htmlReader;
+		
+		void CreateHtmlReader(string html)
+		{
+			htmlReader = new RazorHtmlReader(html);
+		}
+		
+		[Test]
+		public void Value_ReadFirstParagraphTagInsideIfStatementWithLessThanSign_ReturnsParagraphTagName()
+		{
+			string html = 
+				"@if (i<a || b>i) {\r\n" +
+				"    <p></p>\r\n" +
+				"}\r\n";
+				
+			CreateHtmlReader(html);
+			htmlReader.Read();
+			
+			string value = htmlReader.Value;
+			
+			Assert.AreEqual("p", value);
+		}
+
+
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Test/Src/Folding/RazorMarkupCharacterReaderTests.cs

@@ -0,0 +1,63 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using ICSharpCode.AspNet.Mvc.Folding;
+using NUnit.Framework;
+
+namespace AspNet.Mvc.Tests.Folding
+{
+	[TestFixture]
+	public class RazorMarkupCharacterReaderTests
+	{
+		RazorMarkupCharacterReader reader;
+		
+		void CreateReader(string html)
+		{
+			reader = new RazorMarkupCharacterReader(html);
+		}
+		
+		[Test]
+		public void IsHtml_CurrentCharacterIsAtStartOfHtml_ReturnsTrue()
+		{
+			CreateReader("<br/>");
+			
+			bool htmlCharacterRead = reader.IsHtml;
+			
+			Assert.IsTrue(htmlCharacterRead);
+		}
+		
+		[Test]
+		public void IsHtml_FirstCharacterReadIsRazorTransitionSymbol_ReturnsFalse()
+		{
+			CreateReader("@model");
+			reader.Read();
+			
+			bool result = reader.IsHtml;
+			
+			Assert.IsFalse(result);
+		}
+		
+		[Test]
+		public void IsHtml_ReadFirstRazorTransitionSymbolAfterParagraphTag_ReturnsFalse()
+		{
+			CreateReader("<p>@model.Message</p>");
+			reader.ReadCharacters(4);
+			
+			bool htmlCharacterRead = reader.IsHtml;
+			
+			Assert.IsFalse(htmlCharacterRead);
+		}
+		
+		[Test]
+		public void IsHtml_ReadFirstCharacterAfterRazorTransitionSymbol_ReturnsFalse()
+		{
+			CreateReader("<p>@model.Message</p>");
+			reader.ReadCharacters(5);
+			
+			bool htmlCharacterRead = reader.IsHtml;
+			
+			Assert.IsFalse(htmlCharacterRead);
+		}
+	}
+}

src/AddIns/BackendBindings/AspNet.Mvc/Test/Src/Folding/WebFormsLanguageBindingTests.cs

@@ -17,7 +17,7 @@ namespace AspNet.Mvc.Tests.Folding
 		WebFormsLanguageBinding languageBinding;
 		ITextEditor fakeTextEditor;
 		ITextEditorWithParseInformationFoldingFactory fakeTextEditorFactory;
-		IWebFormsFoldGeneratorFactory fakeFoldGeneratorFactory;
+		IFoldGeneratorFactory fakeFoldGeneratorFactory;
 		IFoldGenerator fakeFoldGenerator;
 		
 		[SetUp]
@@ -39,7 +39,7 @@ namespace AspNet.Mvc.Tests.Folding
 		
 		void CreateFakeFoldGeneratorFactory()
 		{
-			fakeFoldGeneratorFactory = MockRepository.GenerateStub<IWebFormsFoldGeneratorFactory>();
+			fakeFoldGeneratorFactory = MockRepository.GenerateStub<IFoldGeneratorFactory>();
 		}
 		
 		void AddFakeFoldGeneratorToFactory()