private void HandleNavigationComplete(TabRenderer sender)
        {
            var tab = GetTabGroup(sender);

            tab.TabButton.PageName = tab.TabRenderer.DocumentTitle;

            if (tab.TabRenderer.PageType == PageType.Web)
            {
                tab.TabButton.SetFaviconSource(new BitmapImage(new Uri($"https://www.google.com/s2/favicons?sz=24&domain={tab.TabRenderer.Uri}")));
            }
            else if (tab.TabRenderer.PageType == PageType.Native)
            {
                string uri = tab.TabRenderer.Uri.Remove(0, NativeView.UriPrefix.Length);

                if (NativePages.ContainsKey(uri))
                {
                    tab.TabButton.SetNativeFaviconSource(NativePages.Get(uri).Icon);
                }
                else
                {
                    tab.TabButton.SetNativeFaviconSource(new FontIcon {
                        FontFamily = new FontFamily("Segoe MDL2 Assets"), Glyph = "\xE9CE"
                    });
                }
            }

            if (FocusedTab == tab)
            {
                OnNavigationComplete?.Invoke(tab, true);
                return;
            }

            OnNavigationComplete?.Invoke(tab, false);
        }
        private void SwitchTab(TabGroup tabToSwitchTo)
        {
            if (FocusedTab == tabToSwitchTo)
            {
                return;
            }

            //AB_searchBox.PlaceholderText = $"Search with {Settings.UserSettings.SearchEngine} or enter address";

            // Hides all tabs.
            foreach (var tab in tabs)
            {
                tab.TabButton.Active             = false;
                tab.TabRenderer.Frame.Visibility = Visibility.Collapsed;
            }

            // Shows the chosen tab.
            FocusedTab = tabToSwitchTo;
            FocusedTab.TabButton.Active             = true;
            FocusedTab.TabRenderer.Frame.Visibility = Visibility.Visible;
            FocusedTab.TabRenderer.Focus(FocusState.Keyboard);

            // Simple hack to update the top bar buttons when switching between existing tabs.
            OnNavigationComplete?.Invoke(tabToSwitchTo, true);
        }