Restore SEBPatch

SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/ApplicationControl.xaml.cs

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+/*
+ * Copyright (c) 2024 ETH Zürich, IT Services
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Automation;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Media;
+using System.Windows.Threading;
+using SafeExamBrowser.Applications.Contracts;
+using SafeExamBrowser.UserInterface.Contracts.Shell;
+using SafeExamBrowser.UserInterface.Shared.Utilities;
+
+namespace SafeExamBrowser.UserInterface.Mobile.Controls.Taskbar
+{
+	internal partial class ApplicationControl : UserControl, IApplicationControl
+	{
+		private readonly IApplication<IApplicationWindow> application;
+		private IApplicationWindow single;
+
+		internal ApplicationControl(IApplication<IApplicationWindow> application)
+		{
+			this.application = application;
+
+			InitializeComponent();
+			InitializeApplicationControl();
+		}
+
+		private void InitializeApplicationControl()
+		{
+			var originalBrush = Button.Background;
+
+			application.WindowsChanged += Application_WindowsChanged;
+
+			ActiveBar.MouseLeave += (o, args) => WindowPopup.IsOpen &= WindowPopup.IsMouseOver || Button.IsMouseOver;
+			Button.Click += Button_Click;
+			Button.Content = IconResourceLoader.Load(application.Icon);
+			Button.MouseEnter += (o, args) => WindowPopup.IsOpen = WindowStackPanel.Children.Count > 0;
+			Button.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => WindowPopup.IsOpen = WindowPopup.IsMouseOver || ActiveBar.IsMouseOver));
+			Button.ToolTip = application.Tooltip;
+			WindowPopup.CustomPopupPlacementCallback = new CustomPopupPlacementCallback(WindowPopup_PlacementCallback);
+			WindowPopup.MouseLeave += (o, args) => Task.Delay(250).ContinueWith(_ => Dispatcher.Invoke(() => WindowPopup.IsOpen = IsMouseOver));
+
+			if (application.Tooltip != default)
+			{
+				AutomationProperties.SetName(Button, application.Tooltip);
+			}
+
+			WindowPopup.Opened += (o, args) =>
+			{
+				ActiveBar.Width = double.NaN;
+				Background = Brushes.LightGray;
+				Button.Background = Brushes.LightGray;
+			};
+
+			WindowPopup.Closed += (o, args) =>
+			{
+				ActiveBar.Width = 40;
+				Background = originalBrush;
+				Button.Background = originalBrush;
+			};
+		}
+
+		private void Application_WindowsChanged()
+		{
+			Dispatcher.InvokeAsync(Update);
+		}
+
+		private void Button_Click(object sender, RoutedEventArgs e)
+		{
+			if (WindowStackPanel.Children.Count == 0)
+			{
+				application.Start();
+			}
+			else if (WindowStackPanel.Children.Count == 1)
+			{
+				single?.Activate();
+			}
+		}
+
+		private CustomPopupPlacement[] WindowPopup_PlacementCallback(Size popupSize, Size targetSize, Point offset)
+		{
+			return new[]
+			{
+				new CustomPopupPlacement(new Point(targetSize.Width / 2 - popupSize.Width / 2, -popupSize.Height), PopupPrimaryAxis.None)
+			};
+		}
+
+		private void Update()
+		{
+			var windows = application.GetWindows();
+
+			ActiveBar.Visibility = windows.Any() ? Visibility.Visible : Visibility.Collapsed;
+			WindowStackPanel.Children.Clear();
+
+			foreach (var window in windows)
+			{
+				WindowStackPanel.Children.Add(new ApplicationWindowButton(window));
+			}
+
+			if (WindowStackPanel.Children.Count == 1)
+			{
+				single = windows.First();
+			}
+			else
+			{
+				single = default;
+			}
+		}
+	}
+}