Allow using DocumentHighlighter with ReadOnlyDocument.

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/CustomizableHighlightingColorizer.cs

@@ -12,6 +12,8 @@ using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Editing;
 using ICSharpCode.AvalonEdit.Highlighting;
 using ICSharpCode.AvalonEdit.Rendering;
+using ICSharpCode.AvalonEdit.Utils;
+using ICSharpCode.NRefactory.Editor;
 
 namespace ICSharpCode.AvalonEdit.AddIn
 {
@@ -119,11 +121,11 @@ namespace ICSharpCode.AvalonEdit.AddIn
 				this.baseHighlighter = baseHighlighter;
 			}
 
-			public TextDocument Document {
+			public IDocument Document {
 				get { return baseHighlighter.Document; }
 			}
 			
-			public ICSharpCode.AvalonEdit.Utils.ImmutableStack<HighlightingSpan> GetSpanStack(int lineNumber)
+			public ImmutableStack<HighlightingSpan> GetSpanStack(int lineNumber)
 			{
 				return baseHighlighter.GetSpanStack(lineNumber);
 			}

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Highlighting/DocumentHighlighter.cs

@@ -6,9 +6,9 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using System.Text.RegularExpressions;
-
 using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Utils;
+using ICSharpCode.NRefactory.Editor;
 using SpanStack = ICSharpCode.AvalonEdit.Utils.ImmutableStack<ICSharpCode.AvalonEdit.Highlighting.HighlightingSpan>;
 
 namespace ICSharpCode.AvalonEdit.Highlighting
@@ -26,14 +26,14 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		/// </summary>
 		readonly CompressingTreeList<SpanStack> storedSpanStacks = new CompressingTreeList<SpanStack>(object.ReferenceEquals);
 		readonly CompressingTreeList<bool> isValid = new CompressingTreeList<bool>((a, b) => a == b);
-		readonly TextDocument document;
+		readonly IDocument document;
 		readonly HighlightingRuleSet baseRuleSet;
 		bool isHighlighting;
 		
 		/// <summary>
 		/// Gets the document that this DocumentHighlighter is highlighting.
 		/// </summary>
-		public TextDocument Document {
+		public IDocument Document {
 			get { return document; }
 		}
 		
@@ -52,6 +52,20 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 			InvalidateHighlighting();
 		}
 		
+		/// <summary>
+		/// Creates a new DocumentHighlighter instance.
+		/// </summary>
+		public DocumentHighlighter(ReadOnlyDocument document, HighlightingRuleSet baseRuleSet)
+		{
+			if (document == null)
+				throw new ArgumentNullException("document");
+			if (baseRuleSet == null)
+				throw new ArgumentNullException("baseRuleSet");
+			this.document = document;
+			this.baseRuleSet = baseRuleSet;
+			InvalidateHighlighting();
+		}
+		
 		void ILineTracker.BeforeRemoveLine(DocumentLine line)
 		{
 			CheckIsHighlighting();
@@ -125,19 +139,6 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		
 		int firstInvalidLine;
 		
-		/// <summary>
-		/// Highlights the specified document line.
-		/// </summary>
-		/// <param name="line">The line to highlight.</param>
-		/// <returns>A <see cref="HighlightedLine"/> line object that represents the highlighted sections.</returns>
-		[ObsoleteAttribute("Use the (int lineNumber) overload instead")]
-		public HighlightedLine HighlightLine(DocumentLine line)
-		{
-			if (!document.Lines.Contains(line))
-				throw new ArgumentException("The specified line does not belong to the document.");
-			return HighlightLine(line.LineNumber);
-		}
-		
 		/// <inheritdoc/>
 		public HighlightedLine HighlightLine(int lineNumber)
 		{
@@ -146,7 +147,7 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 			isHighlighting = true;
 			try {
 				HighlightUpTo(lineNumber);
-				DocumentLine line = document.GetLineByNumber(lineNumber);
+				IDocumentLine line = document.GetLineByNumber(lineNumber);
 				highlightedLine = new HighlightedLine(document, line);
 				HighlightLineAndUpdateTreeList(line, lineNumber);
 				return highlightedLine;
@@ -187,7 +188,7 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 			}
 		}
 		
-		void HighlightLineAndUpdateTreeList(DocumentLine line, int lineNumber)
+		void HighlightLineAndUpdateTreeList(IDocumentLine line, int lineNumber)
 		{
 			//Debug.WriteLine("Highlight line " + lineNumber + (highlightedLine != null ? "" : " (span stack only)"));
 			spanStack = storedSpanStacks[lineNumber - 1];
@@ -236,7 +237,7 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		/// <remarks>This callback must not call HighlightLine or InvalidateHighlighting.
 		/// It may call GetSpanStack, but only for the changed line and lines above.
 		/// This method must not modify the document.</remarks>
-		protected virtual void OnHighlightStateChanged(DocumentLine line, int lineNumber)
+		protected virtual void OnHighlightStateChanged(IDocumentLine line, int lineNumber)
 		{
 		}
 		
@@ -254,10 +255,10 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		/// </summary>
 		HighlightedLine highlightedLine;
 		
-		void HighlightLineInternal(DocumentLine line)
+		void HighlightLineInternal(IDocumentLine line)
 		{
 			lineStartOffset = line.Offset;
-			lineText = document.GetText(line.Offset, line.Length);
+			lineText = document.GetText(lineStartOffset, line.Length);
 			position = 0;
 			ResetColorStack();
 			HighlightingRuleSet currentRuleSet = this.CurrentRuleSet;

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Highlighting/HighlightedLine.cs

@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
+
 using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Utils;
 using ICSharpCode.NRefactory.Editor;
@@ -19,12 +20,12 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		/// <summary>
 		/// Creates a new HighlightedLine instance.
 		/// </summary>
-		public HighlightedLine(TextDocument document, DocumentLine documentLine)
+		public HighlightedLine(IDocument document, IDocumentLine documentLine)
 		{
 			if (document == null)
 				throw new ArgumentNullException("document");
-			if (!document.Lines.Contains(documentLine))
-				throw new ArgumentException("Line is null or not part of document");
+			//if (!document.Lines.Contains(documentLine))
+			//	throw new ArgumentException("Line is null or not part of document");
 			this.Document = document;
 			this.DocumentLine = documentLine;
 			this.Sections = new NullSafeCollection<HighlightedSection>();
@@ -33,12 +34,12 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		/// <summary>
 		/// Gets the document associated with this HighlightedLine.
 		/// </summary>
-		public TextDocument Document { get; private set; }
+		public IDocument Document { get; private set; }
 		
 		/// <summary>
 		/// Gets the document line associated with this HighlightedLine.
 		/// </summary>
-		public DocumentLine DocumentLine { get; private set; }
+		public IDocumentLine DocumentLine { get; private set; }
 		
 		/// <summary>
 		/// Gets the highlighted sections.
@@ -117,7 +118,7 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 			}
 			elements.Sort();
 			
-			TextDocument document = this.Document;
+			IDocument document = this.Document;
 			StringWriter w = new StringWriter(CultureInfo.InvariantCulture);
 			int textOffset = startOffset;
 			foreach (HtmlElement e in elements) {

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Highlighting/HighlightingColorizer.cs

@@ -6,9 +6,9 @@ using System.Diagnostics;
 using System.Windows;
 using System.Windows.Media;
 using System.Windows.Threading;
-
 using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Rendering;
+using ICSharpCode.NRefactory.Editor;
 
 namespace ICSharpCode.AvalonEdit.Highlighting
 {
@@ -206,7 +206,7 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 				this.textView = textView;
 			}
 			
-			protected override void OnHighlightStateChanged(DocumentLine line, int lineNumber)
+			protected override void OnHighlightStateChanged(IDocumentLine line, int lineNumber)
 			{
 				base.OnHighlightStateChanged(line, lineNumber);
 				if (colorizer.lineNumberBeingColorized != lineNumber) {

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Highlighting/HtmlClipboard.cs

@@ -66,7 +66,7 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		/// <param name="segment">The part of the document to create HTML for. You can pass <c>null</c> to create HTML for the whole document.</param>
 		/// <param name="options">The options for the HTML creation.</param>
 		/// <returns>HTML code for the document part.</returns>
-		public static string CreateHtmlFragment(TextDocument document, IHighlighter highlighter, ISegment segment, HtmlOptions options)
+		public static string CreateHtmlFragment(IDocument document, IHighlighter highlighter, ISegment segment, HtmlOptions options)
 		{
 			if (document == null)
 				throw new ArgumentNullException("document");
@@ -79,7 +79,7 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 			
 			StringBuilder html = new StringBuilder();
 			int segmentEndOffset = segment.EndOffset;
-			DocumentLine line = document.GetLineByOffset(segment.Offset);
+			IDocumentLine line = document.GetLineByOffset(segment.Offset);
 			while (line != null && line.Offset < segmentEndOffset) {
 				HighlightedLine highlightedLine;
 				if (highlighter != null)

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Highlighting/IHighlighter.cs

@@ -2,8 +2,8 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
-using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Utils;
+using ICSharpCode.NRefactory.Editor;
 
 namespace ICSharpCode.AvalonEdit.Highlighting
 {
@@ -16,7 +16,7 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		/// <summary>
 		/// Gets the underlying text document.
 		/// </summary>
-		TextDocument Document { get; }
+		IDocument Document { get; }
 		
 			/// <summary>
 		/// Gets the span stack at the end of the specified line.