1 files changed, 123 insertions, 0 deletions
diff --git a/main/src/addins/MonoDevelop.SourceEditor2/MonoDevelop.SourceEditor/TextMarker/GrayOutMarker.cs b/main/src/addins/MonoDevelop.SourceEditor2/MonoDevelop.SourceEditor/TextMarker/GrayOutMarker.cs
new file mode 100644
index 0000000000..4e5dcd4d56
--- /dev/null
+++ b/main/src/addins/MonoDevelop.SourceEditor2/MonoDevelop.SourceEditor/TextMarker/GrayOutMarker.cs
@@ -0,0 +1,123 @@
+//
+// GrayOutMarker.cs
+//
+// Author:
+//       Mike Krüger <mkrueger@xamarin.com>
+//
+// Copyright (c) 2014 Xamarin Inc. (http://xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System;
+using Mono.TextEditor;
+using System.Collections.Generic;
+using MonoDevelop.Components;
+
+namespace MonoDevelop.SourceEditor
+{
+	class GrayOutMarker : UnderlineTextSegmentMarker, IChunkMarker, MonoDevelop.Ide.Editor.IGenericTextSegmentMarker
+	{
+		public GrayOutMarker (TextSegment segment) : base ("", segment)
+		{
+		}
+
+		public override void Draw (MonoTextEditor editor, Cairo.Context cr, LineMetrics metrics, int startOffset, int endOffset)
+		{
+			// nothing (is drawn using chunk marker)
+		}
+
+		#region IChunkMarker implementation
+
+		void IChunkMarker.TransformChunks (List<Chunk> chunks)
+		{
+			int markerStart = Segment.Offset;
+			int markerEnd = Segment.EndOffset;
+			for (int i = 0; i < chunks.Count; i++) {
+				var chunk = chunks [i];
+				if (chunk.EndOffset < markerStart || markerEnd <= chunk.Offset) 
+					continue;
+				if (chunk.Offset == markerStart && chunk.EndOffset == markerEnd)
+					return;
+				if (chunk.Offset < markerStart && chunk.EndOffset > markerEnd) {
+					var newChunk = new Chunk (chunk.Offset, markerStart - chunk.Offset, chunk.Style);
+					chunks.Insert (i, newChunk);
+					chunk.Offset += newChunk.Length;
+					chunk.Length -= newChunk.Length;
+					continue;
+				}
+			}
+		}
+
+		void IChunkMarker.ChangeForeColor (MonoTextEditor editor, Chunk chunk, ref Cairo.Color color)
+		{
+			if (Debugger.DebuggingService.IsDebugging)
+				return;
+			int markerStart = Segment.Offset;
+			int markerEnd = Segment.EndOffset;
+			if (chunk.EndOffset <= markerStart || markerEnd <= chunk.Offset) 
+				return;
+			var bgc = editor.ColorStyle.PlainText.Background;
+			double alpha = 0.6;
+			color = new Cairo.Color (
+				color.R * alpha + bgc.R * (1.0 - alpha),
+				color.G * alpha + bgc.G * (1.0 - alpha),
+				color.B * alpha + bgc.B * (1.0 - alpha)
+			);
+		}
+		#endregion
+
+		event EventHandler<MonoDevelop.Ide.Editor.TextMarkerMouseEventArgs> MonoDevelop.Ide.Editor.ITextSegmentMarker.MousePressed {
+			add {
+				throw new NotSupportedException ();
+			}
+			remove {
+				throw new NotSupportedException ();
+			}
+		}
+
+		event EventHandler<MonoDevelop.Ide.Editor.TextMarkerMouseEventArgs> MonoDevelop.Ide.Editor.ITextSegmentMarker.MouseHover {
+			add {
+				throw new NotSupportedException ();
+			}
+			remove {
+				throw new NotSupportedException ();
+			}
+		}
+
+		object MonoDevelop.Ide.Editor.ITextSegmentMarker.Tag {
+			get;
+			set;
+		}
+
+		MonoDevelop.Ide.Editor.TextSegmentMarkerEffect MonoDevelop.Ide.Editor.IGenericTextSegmentMarker.Effect {
+			get {
+				return MonoDevelop.Ide.Editor.TextSegmentMarkerEffect.GrayOut;
+			}
+		}
+
+		HslColor MonoDevelop.Ide.Editor.IGenericTextSegmentMarker.Color {
+			get {
+				throw new NotSupportedException ();
+			}
+			set {
+				throw new NotSupportedException ();
+			}
+		}
+	}
+}