public static TextEditorData Create (string content)
		{
			int caretIndex = content.IndexOf ("$");
			if (caretIndex >= 0)
				content = content.Substring (0, caretIndex) + content.Substring (caretIndex + 1);

			int selection1 = content.IndexOf ("<-");
			int selection2 = content.IndexOf ("->");
			
			int selectionStart = 0;
			int selectionEnd = 0;
			if (0 <= selection1 && selection1 < selection2) {
				content = content.Substring (0, selection2) + content.Substring (selection2 + 2);
				content = content.Substring (0, selection1) + content.Substring (selection1 + 2);
				selectionStart = selection1;
				selectionEnd = selection2 - 2;
				caretIndex = selectionEnd;
			}

			var data = new TextEditorData ();
			data.Text = content;
			if (caretIndex >= 0)
				data.Caret.Offset = caretIndex;
			if (selection1 >= 0) {
				if (caretIndex == selectionStart) {
					data.SetSelection (selectionEnd, selectionStart);
				} else {
					data.SetSelection (selectionStart, selectionEnd);
				}
			}
			return data;
		}

		TextEditorData CreateData ()
		{
			var data = new TextEditorData ();
			data.IndentationTracker = IndentTracker;
			data.Options.IndentStyle = IndentStyle.Smart;
			return data;
		}

		TextEditorData CreateData (string content)
		{
			var data = new TextEditorData (new TextDocument (content));
			data.IndentationTracker = IndentTracker;
			data.Options.IndentStyle = IndentStyle.Smart;
			return data;
		}

		public static TextEditorData CreateData (string content)
		{
			var data = new TextEditorData (new TextDocument (content));
			data.IndentationTracker = SmartIndentModeTests.IndentTracker;
			data.Options.IndentStyle = IndentStyle.Virtual;
			return data;
		}

		public static string GetMarkup (string input, string syntaxMode)
		{
			var data = new TextEditorData (new TextDocument (input));
			data.Document.SyntaxMode = SyntaxModeService.GetSyntaxMode (data.Document, syntaxMode);
			data.ColorStyle = SyntaxModeService.GetColorStyle ("TangoLight");
			return data.GetMarkup (0, data.Length, false);
		}

		TextEditorData CreateData ()
		{
			var data = new TextEditorData ();
			data.IndentationTracker = SmartIndentModeTests.IndentTracker;
			data.Options.IndentStyle = IndentStyle.Virtual;
			return data;
		}

		public static void Join (TextEditorData data)
		{
			int startLine, endLine, startOffset, length;
			
			if (data.IsSomethingSelected) {
				startLine = data.Document.OffsetToLineNumber (data.SelectionRange.Offset);
				endLine = data.Document.OffsetToLineNumber (data.SelectionRange.EndOffset - 1);
			} else {
				startLine = endLine = data.Caret.Line;
			}
			
			//single-line joins
			if (endLine == startLine)
				endLine++;
			
			if (endLine > data.Document.LineCount)
				return;
			
			DocumentLine seg = data.Document.GetLine (startLine);
			startOffset = seg.Offset;
			StringBuilder sb = new StringBuilder (data.Document.GetTextAt (seg).TrimEnd ());
			//lastSpaceOffset = startOffset + sb.Length;
			
			for (int i = startLine + 1; i <= endLine; i++) {
				seg = data.Document.GetLine (i);
				//lastSpaceOffset = startOffset + sb.Length;
				sb.Append (" ");
				sb.Append (data.Document.GetTextAt (seg).Trim ());
			}
			length = (seg.Offset - startOffset) + seg.Length;
			// TODO: handle conversion issues ? 
			data.Replace (startOffset, length, sb.ToString ());
		}

		public void TestBug14716 ()
		{
			var data = new TextEditorData ();
			data.Document.Text = "using System;\nusing System.Linq;\nusing System.Collections.Generic;\n";
			data.SearchEngine = new RegexSearchEngine ();
			data.SearchEngine.SearchRequest.SearchPattern = "u.i.g";
			data.SearchReplaceAll ("bar");
			Assert.AreEqual ("bar System;\nbar System.Linq;\nbar System.Collections.Generic;\n", data.Document.Text );
		}

		string CreateInsertionPoint (string input, string text, NewLineInsertion before, NewLineInsertion after)
		{
			int idx = input.IndexOf ('$');
			Assert.Greater (idx, -1);
			TextEditorData data = new TextEditorData (new TextDocument (input.Substring (0, idx) + input.Substring (idx + 1)));
			InsertionPoint point = new InsertionPoint (data.Document.OffsetToLocation (idx), before, after);
			point.Insert (data, text);
			return data.Document.Text;
		}

		protected override void OnRemovedFromEditor (TextEditorData data)
		{
			SetCaretMode (CaretMode.Insert, data);

			if (viTextEditor != null) {
				statusArea.RemoveFromParentAndDestroy ();
				statusArea = null;
				viTextEditor = null;
			}
		}

		public static void Check (TextEditorData data, string output, bool reverse)
		{
			int offset1 = output.IndexOf ('[');
			int offset2 = output.IndexOf (']');
			string expected = output.Substring (0, offset1) + output.Substring (offset1 + 1, (offset2 - offset1) - 1) + output.Substring (offset2 + 1);
			offset2--;
			Assert.AreEqual (expected, data.Text);
			Assert.AreEqual (data.OffsetToLocation (reverse ? offset2 : offset1), data.MainSelection.Anchor);
			Assert.AreEqual (data.OffsetToLocation (reverse ? offset1 : offset2), data.MainSelection.Lead);
		}

		public void TestSimpleYToLineNumber ()
		{
			var editor = new TextEditorData ();
			editor.Text = "1\n2\n3\n4\n5\n6\n7";
			HeightTree heightTree = new HeightTree (editor);
			heightTree.Rebuild ();
			for (int i = 1; i <= editor.LineCount; i++) {
				Assert.AreEqual (i, heightTree.YToLineNumber ((i - 1) * editor.LineHeight));
			}
		}

		public void LoadMark (TextEditorData data) {
			int x = base.LineSegment.LineNumber;
			data.Caret.Line = x;
			int len = base.LineSegment.LengthIncludingDelimiter;
			if (ColumnNumber >= len) {
				// Check if the line has been truncated after the setting the mark
				data.Caret.Column = len - 1;
			} else {
				data.Caret.Column = ColumnNumber;
			}
		}

		protected override void OnAddedToEditor (TextEditorData data)
		{
			ViEditor.SetMode (ViEditorMode.Normal);
			SetCaretMode (CaretMode.Block, data);
			ViActions.RetreatFromLineEnd (data);

			viTextEditor = data.Parent;
			if (viTextEditor != null) {
				statusArea = new ViStatusArea (viTextEditor);
			}
		}

		public static void NewLineAbove (TextEditorData data)
		{
			if (data.Caret.Line == DocumentLocation.MinLine ) {
				data.Caret.Offset = 0;
				MiscActions.InsertNewLine (data);
				data.Caret.Offset = 0;
				return;
			}
			
			DocumentLine currentLine = data.Document.GetLine (data.Caret.Line - 1);
			data.Caret.Offset = currentLine.Offset + currentLine.Length;
			MiscActions.InsertNewLine (data);
		}

		internal static TextEditorData Create (string text)
		{
			TextEditorData result = new TextEditorData ();
			if (text.IndexOf ('$') >= 0) {
				int caretOffset = text.IndexOf ('$');
				result.Document.Text = text.Remove (caretOffset, 1);
				result.Caret.Offset = caretOffset;
			} else {
				result.Document.Text = text;
			}
			return result;
			
		}

		public static void SetSelection (TextEditorData data, bool reverse)
		{
			ISegment selection = GetSelection (data, reverse);
			
			if (reverse) {
				data.Caret.Offset = selection.Offset;
				data.SelectionAnchor = selection.EndOffset;
				data.ExtendSelectionTo (selection.Offset);
			} else {
				data.Caret.Offset = selection.EndOffset;
				data.SelectionAnchor = selection.Offset;
				data.ExtendSelectionTo (selection.EndOffset);
			}
		}

		public void TestYToLineNumberWithFolds ()
		{
			var editor = new TextEditorData ();
			editor.Text = "1\n2\n3\n4\n5\n6\n7\n8\n9\n0";
			HeightTree heightTree = new HeightTree (editor);
			heightTree.Rebuild ();
			heightTree.Fold (1, 2);
			heightTree.Fold (6, 3);
			heightTree.Fold (5, 5);
			
			Assert.AreEqual (1, heightTree.YToLineNumber (0 * editor.LineHeight));
			Assert.AreEqual (4, heightTree.YToLineNumber (1 * editor.LineHeight));
			Assert.AreEqual (5, heightTree.YToLineNumber (2 * editor.LineHeight));
		}

		public void SaveMark (TextEditorData data) {
		
			if (base.LineSegment != null) {
				// Remove the marker first
				data.Document.RemoveMarker (this);
			}
		
			// Is there a better way of doing this?
			int lineNumber = data.IsSomethingSelected ? data.MainSelection.MinLine : data.Caret.Line;
			base.LineSegment = data.Document.GetLine (lineNumber);
			ColumnNumber = data.Caret.Column;
			data.Document.AddMarker(lineNumber, this);
			
			data.Document.RequestUpdate (new UpdateAll ());
			data.Document.CommitDocumentUpdate ();
			
		}

		internal static TextEditorData Create (string text)
		{
			TextEditorData result = new TextEditorData ();
			if (text.IndexOf ('$') >= 0) {
				int caretOffset = text.IndexOf ('$');
				result.Document.Text = text.Remove (caretOffset, 1);
				result.Caret.Offset = caretOffset;
			} else {
				result.Document.Text = text;
			}
			for (int i = 1; i <= result.Document.LineCount; i++) {
				if (result.Document.GetLineText (i).StartsWith ("@"))
					result.GetLine (i).IsBookmarked = true;
			}
			return result;
			
		}