MERGE

1 files changed, 61 insertions, 0 deletions

diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/UndoOperationGroup.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/UndoOperationGroup.cs
new file mode 100644
index 000000000..12afe3838
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Document/UndoOperationGroup.cs
@@ -0,0 +1,61 @@
+// 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;
+using System.Diagnostics;
+using Tango.Scripting.Editors.Utils;
+
+namespace Tango.Scripting.Editors.Document
+{
+	/// <summary>
+	/// This class stacks the last x operations from the undostack and makes
+	/// one undo/redo operation from it.
+	/// </summary>
+	sealed class UndoOperationGroup : IUndoableOperationWithContext
+	{
+		IUndoableOperation[] undolist;
+		
+		public UndoOperationGroup(Deque<IUndoableOperation> stack, int numops)
+		{
+			if (stack == null)  {
+				throw new ArgumentNullException("stack");
+			}
+			
+			Debug.Assert(numops > 0 , "UndoOperationGroup : numops should be > 0");
+			Debug.Assert(numops <= stack.Count);
+			
+			undolist = new IUndoableOperation[numops];
+			for (int i = 0; i < numops; ++i) {
+				undolist[i] = stack.PopBack();
+			}
+		}
+		
+		public void Undo()
+		{
+			for (int i = 0; i < undolist.Length; ++i) {
+				undolist[i].Undo();
+			}
+		}
+		
+		public void Undo(UndoStack stack)
+		{
+			for (int i = 0; i < undolist.Length; ++i) {
+				stack.RunUndo(undolist[i]);
+			}
+		}
+		
+		public void Redo()
+		{
+			for (int i = undolist.Length - 1; i >= 0; --i) {
+				undolist[i].Redo();
+			}
+		}
+		
+		public void Redo(UndoStack stack)
+		{
+			for (int i = undolist.Length - 1; i >= 0; --i) {
+				stack.RunRedo(undolist[i]);
+			}
+		}
+	}
+}