1 files changed, 43 insertions, 0 deletions
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/TextViewCachedElements.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/TextViewCachedElements.cs
new file mode 100644
index 000000000..c56e22eaf
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/TextViewCachedElements.cs
@@ -0,0 +1,43 @@
+// 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.Windows.Media;
+using System.Windows.Media.TextFormatting;
+using Tango.Scripting.Editors.Utils;
+
+namespace Tango.Scripting.Editors.Rendering
+{
+	sealed class TextViewCachedElements : IDisposable
+	{
+		TextFormatter formatter;
+		Dictionary<string, TextLine> nonPrintableCharacterTexts;
+		
+		public TextLine GetTextForNonPrintableCharacter(string text, ITextRunConstructionContext context)
+		{
+			if (nonPrintableCharacterTexts == null)
+				nonPrintableCharacterTexts = new Dictionary<string, TextLine>();
+			TextLine textLine;
+			if (!nonPrintableCharacterTexts.TryGetValue(text, out textLine)) {
+				var p = new VisualLineElementTextRunProperties(context.GlobalTextRunProperties);
+				p.SetForegroundBrush(context.TextView.NonPrintableCharacterBrush);
+				if (formatter == null)
+					formatter = TextFormatterFactory.Create(context.TextView);
+				textLine = FormattedTextElement.PrepareText(formatter, text, p);
+				nonPrintableCharacterTexts[text] = textLine;
+			}
+			return textLine;
+		}
+		
+		public void Dispose()
+		{
+			if (nonPrintableCharacterTexts != null) {
+				foreach (TextLine line in nonPrintableCharacterTexts.Values)
+					line.Dispose();
+			}
+			if (formatter != null)
+				formatter.Dispose();
+		}
+	}
+}