From 8309adf6dac298b5c78b754f064bfdeb40e47933 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Fri, 25 Sep 2015 00:35:11 +0100
Subject: [PATCH] Implemented caret inverting background colour.

---
 src/Perspex.Controls/Presenters/TextPresenter.cs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/Perspex.Controls/Presenters/TextPresenter.cs b/src/Perspex.Controls/Presenters/TextPresenter.cs
index d594d6495b..4d1dccfb52 100644
--- a/src/Perspex.Controls/Presenters/TextPresenter.cs
+++ b/src/Perspex.Controls/Presenters/TextPresenter.cs
@@ -93,7 +93,17 @@ namespace Perspex.Controls.Presenters
             if (selectionStart == selectionEnd)
             {
                 var charPos = FormattedText.HitTestTextPosition(CaretIndex);
-                Brush caretBrush = Brushes.Black;
+
+                var background = this.GetVisualAncestors()
+                .OfType<Control>()
+                .FirstOrDefault(x => x.IsSet(BackgroundProperty))
+                ?.GetValue(BackgroundProperty) as SolidColorBrush;
+
+                byte red = (byte)~(background.Color.R);
+                byte green = (byte)~(background.Color.G);
+                byte blue = (byte)~(background.Color.B);
+
+                var caretBrush = new SolidColorBrush(Color.FromRgb(red, green, blue));
 
                 if (_caretBlink)
                 {