1 files changed, 107 insertions, 0 deletions
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Utils/StringSegment.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Utils/StringSegment.cs
new file mode 100644
index 000000000..f2fad60cf
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Utils/StringSegment.cs
@@ -0,0 +1,107 @@
+// 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;
+
+namespace Tango.Scripting.Editors.Utils
+{
+	/// <summary>
+	/// Represents a string with a segment.
+	/// Similar to System.ArraySegment&lt;T&gt;, but for strings instead of arrays.
+	/// </summary>
+	public struct StringSegment : IEquatable<StringSegment>
+	{
+		readonly string text;
+		readonly int offset;
+		readonly int count;
+		
+		/// <summary>
+		/// Creates a new StringSegment.
+		/// </summary>
+		public StringSegment(string text, int offset, int count)
+		{
+			if (text == null)
+				throw new ArgumentNullException("text");
+			if (offset < 0 || offset > text.Length)
+				throw new ArgumentOutOfRangeException("offset");
+			if (offset + count > text.Length)
+				throw new ArgumentOutOfRangeException("count");
+			this.text = text;
+			this.offset = offset;
+			this.count = count;
+		}
+		
+		/// <summary>
+		/// Creates a new StringSegment.
+		/// </summary>
+		public StringSegment(string text)
+		{
+			if (text == null)
+				throw new ArgumentNullException("text");
+			this.text = text;
+			this.offset = 0;
+			this.count = text.Length;
+		}
+		
+		/// <summary>
+		/// Gets the string used for this segment.
+		/// </summary>
+		public string Text {
+			get { return text; }
+		}
+		
+		/// <summary>
+		/// Gets the start offset of the segment with the text.
+		/// </summary>
+		public int Offset {
+			get { return offset; }
+		}
+		
+		/// <summary>
+		/// Gets the length of the segment.
+		/// </summary>
+		public int Count {
+			get { return count; }
+		}
+		
+		#region Equals and GetHashCode implementation
+		/// <inheritdoc/>
+		public override bool Equals(object obj)
+		{
+			if (obj is StringSegment)
+				return Equals((StringSegment)obj); // use Equals method below
+			else
+				return false;
+		}
+		
+		/// <inheritdoc/>
+		public bool Equals(StringSegment other)
+		{
+			// add comparisions for all members here
+			return object.ReferenceEquals(this.text, other.text) && offset == other.offset && count == other.count;
+		}
+		
+		/// <inheritdoc/>
+		public override int GetHashCode()
+		{
+			return text.GetHashCode() ^ offset ^ count;
+		}
+		
+		/// <summary>
+		/// Equality operator.
+		/// </summary>
+		public static bool operator ==(StringSegment left, StringSegment right)
+		{
+			return left.Equals(right);
+		}
+		
+		/// <summary>
+		/// Inequality operator.
+		/// </summary>
+		public static bool operator !=(StringSegment left, StringSegment right)
+		{
+			return !left.Equals(right);
+		}
+		#endregion
+	}
+}