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ICSharpCode.TextEditor/Project/Src/Document/TextBufferStrategy/StringTextBufferStrategy.cs

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+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Mike Krüger" email="mike@icsharpcode.net"/>
+//     <version>$Revision$</version>
+// </file>
+
+using System;
+using System.IO;
+using System.Text;
+
+namespace ICSharpCode.TextEditor.Document
+{
+	/// <summary>
+	/// Simple implementation of the ITextBuffer interface implemented using a
+	/// string.
+	/// Only for fall-back purposes.
+	/// </summary>
+	public class StringTextBufferStrategy : ITextBufferStrategy
+	{
+		string storedText = "";
+		
+		public int Length {
+			get {
+				return storedText.Length;
+			}
+		}
+		
+		public void Insert(int offset, string text)
+		{
+			if (text != null) {
+				storedText = storedText.Insert(offset, text);
+			}
+		}
+		
+		public void Remove(int offset, int length)
+		{
+			storedText = storedText.Remove(offset, length);
+		}
+		
+		public void Replace(int offset, int length, string text)
+		{
+			Remove(offset, length);
+			Insert(offset, text);
+		}
+		
+		public string GetText(int offset, int length)
+		{
+			if (length == 0) {
+				return "";
+			}
+			if (offset == 0 && length >= storedText.Length) {
+				return storedText;
+			}
+			return storedText.Substring(offset, Math.Min(length, storedText.Length - offset));
+		}
+		
+		public char GetCharAt(int offset)
+		{
+			if (offset == Length) {
+				return '\0';
+			}
+			return storedText[offset];
+		}
+		
+		public void SetContent(string text)
+		{
+			storedText = text;
+		}
+		
+		public StringTextBufferStrategy()
+		{
+		}
+		
+		public static ITextBufferStrategy CreateTextBufferFromFile(string fileName)
+		{
+			if (!File.Exists(fileName)) {
+				throw new System.IO.FileNotFoundException(fileName);
+			}
+			StringTextBufferStrategy s = new StringTextBufferStrategy();
+			s.SetContent(Util.FileReader.ReadFileContent(fileName, Encoding.Default));
+			return s;
+		}
+	}
+}