From cad4bd501a14a915b0304d29103d37788f253587 Mon Sep 17 00:00:00 2001
From: Dmytro Ovcharov <dmytro.ovcharov@globallogic.com>
Date: Thu, 20 Jul 2017 17:20:54 +0300
Subject: Fixes BXC #53775

---
 .../MonoDevelop.Components/EventBoxTooltip.cs      | 71 ++++++++++++++++++++--
 1 file changed, 65 insertions(+), 6 deletions(-)

(limited to 'main/src/core/MonoDevelop.Ide')

diff --git a/main/src/core/MonoDevelop.Ide/MonoDevelop.Components/EventBoxTooltip.cs b/main/src/core/MonoDevelop.Ide/MonoDevelop.Components/EventBoxTooltip.cs
index ad48d0c426..670fb6d708 100644
--- a/main/src/core/MonoDevelop.Ide/MonoDevelop.Components/EventBoxTooltip.cs
+++ b/main/src/core/MonoDevelop.Ide/MonoDevelop.Components/EventBoxTooltip.cs
@@ -29,9 +29,11 @@ using Gtk;
 using System;
 using MonoDevelop.Components.AtkCocoaHelper;
 using MonoDevelop.Ide.Tasks;
+using MonoDevelop.Ide;
+using Gdk;
 
 namespace MonoDevelop.Components
-{
+{
 	public class EventBoxTooltip : IDisposable
 	{
 		EventBox eventBox;
@@ -43,24 +45,48 @@ namespace MonoDevelop.Components
 			get {
 				return eventBox.Accessible;
 			}
-		}
-
+		}
+
 		/// <summary>
 		/// The EventBox should have Visible set to false otherwise the tooltip pop window
 		/// will have the wrong location.
 		/// </summary>
+
+		ImageView image;
+		Pixbuf normalPixbuf;
+		Pixbuf activePixbuf;
+
 		public EventBoxTooltip (EventBox eventBox)
 		{
 			this.eventBox = eventBox;
+			eventBox.CanFocus = true;
 
 			eventBox.EnterNotifyEvent += HandleEnterNotifyEvent;
 			eventBox.LeaveNotifyEvent += HandleLeaveNotifyEvent;
 			eventBox.FocusInEvent += HandleFocusInEvent;
 			eventBox.FocusOutEvent += HandleFocusOutEvent;
 
+			image = eventBox.Child as ImageView;
+
+			if (image != null) {
+				normalPixbuf = image.Image.ToPixbuf ();
+			}
+			normalPixbuf = image.Image.ToPixbuf ();
+			activePixbuf = normalPixbuf.ColorShiftPixbuf ();
+
+			eventBox.FocusGrabbed += (sender, e) => {
+				if (image != null)
+					image.Image = activePixbuf.ToXwtImage ();
+			};
+
+			eventBox.Focused += (o, args) => {
+				if (image != null)
+					image.Image = normalPixbuf.ToXwtImage ();
+			};
+
 			Position = PopupPosition.TopLeft;
 
-			// Accessibility: Disguise this eventbox as a label
+			// Accessibility: Disguise this eventbox as a label
 			eventBox.Accessible.SetRole (AtkCocoa.Roles.AXStaticText);
 			eventBox.CanFocus = true;
 		}
@@ -89,7 +115,7 @@ namespace MonoDevelop.Components
 		[GLib.ConnectBefore]
 		void HandleFocusInEvent (object sender, EventArgs e)
 		{
-			mouseOver = true;
+			mouseOver = true;
 			ShowTooltip ();
 		}
 
@@ -146,6 +172,39 @@ namespace MonoDevelop.Components
 
 		public TaskSeverity? Severity { get; set; }
 		public PopupPosition Position { get; set; }
-	}
+	}
+#region Extension method for Pixbuf
+	internal static class PixbufExtension
+	{
+		public static unsafe Pixbuf ColorShiftPixbuf (this Pixbuf src, byte shift = 120)
+		{
+			var dest = new Gdk.Pixbuf (src.Colorspace, src.HasAlpha, src.BitsPerSample, src.Width, src.Height);
+
+			byte* src_pixels_orig = (byte*)src.Pixels;
+			byte* dest_pixels_orig = (byte*)dest.Pixels;
+
+			for (int i = 0; i < src.Height; i++) {
+				byte* src_pixels = src_pixels_orig + i * src.Rowstride;
+				byte* dest_pixels = dest_pixels_orig + i * dest.Rowstride;
+
+				for (int j = 0; j < src.Width; j++) {
+					*(dest_pixels++) = PixelClamp (*(src_pixels++) + shift);
+					*(dest_pixels++) = PixelClamp (*(src_pixels++) + shift);
+					*(dest_pixels++) = PixelClamp (*(src_pixels++) + shift);
+
+					if (src.HasAlpha) {
+						*(dest_pixels++) = *(src_pixels++);
+					}
+				}
+			}
+			return dest;
+		}
+
+		static byte PixelClamp (int val)
+		{
+			return (byte)System.Math.Max (0, System.Math.Min (255, val));
+		}
+	}
+#endregion
 }
 
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