1 files changed, 49 insertions, 0 deletions
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/HeightTreeLineNode.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/HeightTreeLineNode.cs
new file mode 100644
index 000000000..459f2a56a
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/HeightTreeLineNode.cs
@@ -0,0 +1,49 @@
+// 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.Collections.Generic;
+using System.Diagnostics;
+
+namespace Tango.Scripting.Editors.Rendering
+{
+	struct HeightTreeLineNode
+	{
+		internal HeightTreeLineNode(double height)
+		{
+			this.collapsedSections = null;
+			this.height = height;
+		}
+		
+		internal double height;
+		internal List<CollapsedLineSection> collapsedSections;
+		
+		internal bool IsDirectlyCollapsed {
+			get { return collapsedSections != null; }
+		}
+		
+		internal void AddDirectlyCollapsed(CollapsedLineSection section)
+		{
+			if (collapsedSections == null)
+				collapsedSections = new List<CollapsedLineSection>();
+			collapsedSections.Add(section);
+		}
+		
+		internal void RemoveDirectlyCollapsed(CollapsedLineSection section)
+		{
+			Debug.Assert(collapsedSections.Contains(section));
+			collapsedSections.Remove(section);
+			if (collapsedSections.Count == 0)
+				collapsedSections = null;
+		}
+		
+		/// <summary>
+		/// Returns 0 if the line is directly collapsed, otherwise, returns <see cref="height"/>.
+		/// </summary>
+		internal double TotalHeight {
+			get {
+				return IsDirectlyCollapsed ? 0 : height;
+			}
+		}
+	}
+}