Fix 'InvalidOperationException: Sequence contains no elements' in CaretReferenceHighlightRenderer.Draw

dgrunwald · dgrunwald · commit ef49522493fa · 2014-02-25T14:48:21.000+01:00
diff --git a/src/AddIns/BackendBindings/CSharpBinding/Project/Src/CaretReferenceHighlightRenderer.cs b/src/AddIns/BackendBindings/CSharpBinding/Project/Src/CaretReferenceHighlightRenderer.cs
@@ -79,6 +79,8 @@ public void Dispose()
 		public void Draw(TextView textView, DrawingContext drawingContext)
 		{
 			if (currentReferences == null) {
+				if (textView.VisualLines.Count == 0)
+					return;
 				var start = textView.VisualLines.First().FirstDocumentLine.LineNumber;
 				var end = textView.VisualLines.Last().LastDocumentLine.LineNumber;
 				currentReferences = new List<ISegment>();

Original file line number	Diff line number	Diff line change
`@@ -79,6 +79,8 @@ public void Dispose()`
`79`	`79`	`public void Draw(TextView textView, DrawingContext drawingContext)`
`80`	`80`	`{`
`81`	`81`	`if (currentReferences == null) {`
	`82`	`+ if (textView.VisualLines.Count == 0)`
	`83`	`+ return;`
`82`	`84`	`var start = textView.VisualLines.First().FirstDocumentLine.LineNumber;`
`83`	`85`	`var end = textView.VisualLines.Last().LastDocumentLine.LineNumber;`
`84`	`86`	`currentReferences = new List<ISegment>();`