1 files changed, 173 insertions, 0 deletions
diff --git a/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Text/StringTextSource.cs b/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Text/StringTextSource.cs
new file mode 100644
index 0000000000..d223d16bc7
--- /dev/null
+++ b/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Text/StringTextSource.cs
@@ -0,0 +1,173 @@
+//
+// StringTextSource.cs
+//
+// Author:
+//       Mike Krüger <mkrueger@xamarin.com>
+//
+// Copyright (c) 2014 Xamarin Inc. (http://xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using System.Text;
+using System.IO;
+
+namespace MonoDevelop.Core.Text
+{
+	/// <summary>
+	/// Implements the ITextSource interface using a string.
+	/// Note that objects from this class are immutable.
+	/// </summary>
+	[Serializable]
+	public class StringTextSource : ITextSource
+	{
+		/// <summary>
+		/// Gets a text source containing the empty string.
+		/// </summary>
+		public static readonly StringTextSource Empty = new StringTextSource (string.Empty);
+
+		readonly string text;
+		readonly ITextSourceVersion version;
+
+		/// <summary>
+		/// Determines if a byte order mark was read or is going to be written.
+		/// </summary>
+		public bool UseBOM { get; private set; }
+
+		/// <summary>
+		/// Encoding of the text that was read from or is going to be saved to.
+		/// </summary>
+		public Encoding Encoding { get; private set; }
+
+		/// <summary>
+		/// Creates a new StringTextSource with the given text.
+		/// </summary>
+		public StringTextSource (string text, Encoding encoding = null, bool useBom = true)
+		{
+			if (text == null)
+				throw new ArgumentNullException ("text");
+			this.text = text;
+			this.UseBOM = useBom;
+			this.Encoding = encoding ?? Encoding.UTF8;
+		}
+
+		/// <summary>
+		/// Creates a new StringTextSource with the given text.
+		/// </summary>
+		public StringTextSource (string text, ITextSourceVersion version, Encoding encoding = null, bool useBom = true)
+		{
+			if (text == null)
+				throw new ArgumentNullException ("text");
+			this.text = text;
+			this.version = version;
+			this.UseBOM = useBom;
+			this.Encoding = encoding ?? Encoding.UTF8;
+		}
+
+		/// <inheritdoc/>
+		public ITextSourceVersion Version {
+			get { return version; }
+		}
+
+		/// <inheritdoc/>
+		public int Length {
+			get { return text.Length; }
+		}
+
+		/// <inheritdoc/>
+		public string Text {
+			get { return text; }
+		}
+
+		/// <inheritdoc/>
+		public ITextSource CreateSnapshot ()
+		{
+			return this; // StringTextSource is immutable
+		}
+
+		/// <inheritdoc/>
+		public ITextSource CreateSnapshot (int offset, int length)
+		{
+			return new StringTextSource (text.Substring (offset, length));
+		}
+
+		/// <inheritdoc/>
+		public char GetCharAt (int offset)
+		{
+			return text [offset];
+		}
+
+		public char this [int offset] {
+			get {
+				return text [offset];
+			}
+		}
+
+		/// <inheritdoc/>
+		public string GetTextAt (int offset, int length)
+		{
+			return text.Substring (offset, length);
+		}
+
+		public StringTextSource WithEncoding (Encoding encoding)
+		{
+			return new StringTextSource (text, encoding, UseBOM);
+		}
+
+		public StringTextSource WithBom (bool useBom)
+		{
+			return new StringTextSource (text, Encoding, useBom);
+		}
+
+		public static StringTextSource ReadFrom (string fileName)
+		{
+			bool hadBom;
+			Encoding encoding;
+			var text = TextFileUtility.ReadAllText (fileName, out hadBom, out encoding);
+			return new StringTextSource (text, encoding, hadBom);
+		}
+
+		/// <inheritdoc/>
+		public TextReader CreateReader ()
+		{
+			return new StringReader (text);
+		}
+
+		/// <inheritdoc/>
+		public TextReader CreateReader (int offset, int length)
+		{
+			return new StringReader (text.Substring (offset, length));
+		}
+
+		/// <inheritdoc/>
+		public void WriteTextTo (TextWriter writer)
+		{
+			if (writer == null)
+				throw new ArgumentNullException ("writer");
+			writer.Write (text);
+		}
+
+		/// <inheritdoc/>
+		public void WriteTextTo (TextWriter writer, int offset, int length)
+		{
+			if (writer == null)
+				throw new ArgumentNullException ("writer");
+			writer.Write (text.Substring (offset, length));
+		}
+	}
+}
+\ No newline at end of file