added DocumentSequence - works on a per line basis, not per character

src/AddIns/DisplayBindings/AvalonEdit.AddIn/AvalonEdit.AddIn.csproj

@@ -94,6 +94,7 @@
     <Compile Include="Src\ContextActionsRenderer.cs" />
     <Compile Include="Src\DefaultChangeWatcher.cs" />
     <Compile Include="Src\ExpressionHighlightRenderer.cs" />
+    <Compile Include="Src\MyersDiff\DocumentSequence.cs" />
     <Compile Include="Src\MyersDiff\Edit.cs" />
     <Compile Include="Src\MyersDiff\ISequence.cs" />
     <Compile Include="Src\MyersDiff\MyersDiff.cs" />

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/MyersDiff/DocumentSequence.cs

@@ -0,0 +1,39 @@
+// 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.SharpDevelop.Editor;
+
+namespace ICSharpCode.AvalonEdit.AddIn.MyersDiff
+{
+	public class DocumentSequence : ISequence
+	{
+		IDocument document;
+		List<int> hashCodes;
+		
+		public DocumentSequence(IDocument document)
+		{
+			this.document = document;
+			this.hashCodes = new List<int>();
+		}
+		
+		public int Size()
+		{
+			return document.TotalNumberOfLines;
+		}
+		
+		public bool Equals(int i, ISequence other, int j)
+		{
+			DocumentSequence seq = other as DocumentSequence;
+			
+			if (seq == null)
+				return false;
+			
+			IDocumentLine thisLine = document.GetLine(i + 1);
+			IDocumentLine otherLine = seq.document.GetLine(j + 1);
+			
+			return thisLine.Text == otherLine.Text;
+		}
+	}
+}

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/MyersDiff/StringSequence.cs

@@ -2,6 +2,8 @@
 // This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
 using System;
+using System.Collections.Generic;
+using ICSharpCode.SharpDevelop.Editor;
 
 namespace ICSharpCode.AvalonEdit.AddIn.MyersDiff
 {
@@ -29,6 +31,4 @@ namespace ICSharpCode.AvalonEdit.AddIn.MyersDiff
 			return content[i] == seq.content[j];
 		}
 	}
-	
-
 }