1 files changed, 40 insertions, 0 deletions
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Indentation/DefaultIndentationStrategy.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Indentation/DefaultIndentationStrategy.cs
new file mode 100644
index 000000000..b5a1f0c2c
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Indentation/DefaultIndentationStrategy.cs
@@ -0,0 +1,40 @@
+// 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 Tango.Scripting.Editors.Utils;
+using System;
+using Tango.Scripting.Editors.Document;
+
+namespace Tango.Scripting.Editors.Indentation
+{
+	/// <summary>
+	/// Handles indentation by copying the indentation from the previous line.
+	/// Does not support indenting multiple lines.
+	/// </summary>
+	public class DefaultIndentationStrategy : IIndentationStrategy
+	{
+		/// <inheritdoc/>
+		public virtual void IndentLine(TextDocument document, DocumentLine line)
+		{
+			if (document == null)
+				throw new ArgumentNullException("document");
+			if (line == null)
+				throw new ArgumentNullException("line");
+			DocumentLine previousLine = line.PreviousLine;
+			if (previousLine != null) {
+				ISegment indentationSegment = TextUtilities.GetWhitespaceAfter(document, previousLine.Offset);
+				string indentation = document.GetText(indentationSegment);
+				// copy indentation to line
+				indentationSegment = TextUtilities.GetWhitespaceAfter(document, line.Offset);
+				document.Replace(indentationSegment, indentation);
+			}
+		}
+		
+		/// <summary>
+		/// Does nothing: indenting multiple lines is useless without a smart indentation strategy.
+		/// </summary>
+		public virtual void IndentLines(TextDocument document, int beginLine, int endLine)
+		{
+		}
+	}
+}