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Started working on window monitoring.

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This commit is contained in:
Damian Büchel 2017-07-24 08:56:39 +02:00
parent e7b8404254
commit f5d76980d0
9 changed files with 120 additions and 21 deletions
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20
SafeExamBrowser.Contracts/Monitoring/IWindowMonitor.cs
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@ -10,5 +10,25 @@ namespace SafeExamBrowser.Contracts.Monitoring
{
public interface IWindowMonitor
{
/// <summary>
/// Hides all currently opened windows.
/// </summary>
void HideAllWindows();
/// <summary>
/// Restores all windows which were hidden during the startup procedure.
/// </summary>
void RestoreHiddenWindows();
/// <summary>
/// Starts monitoring application windows by subscribing to specific system events.
/// If a window is shown which is not supposed to do so, it will be automatically hidden.
/// </summary>
void StartMonitoringWindows();
/// <summary>
/// Stops monitoring windows and deregisters from any subscribed system events.
/// </summary>
void StopMonitoringWindows();
}
}

10
SafeExamBrowser.Core/Behaviour/Operations/ProcessMonitoringOperation.cs
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@ -30,6 +30,11 @@ namespace SafeExamBrowser.Core.Behaviour.Operations
public void Perform()
{
logger.Info("--- Initializing process monitoring ---");
SplashScreen.UpdateText(Key.SplashScreen_WaitExplorerTermination, true);
processMonitor.CloseExplorerShell();
processMonitor.StartMonitoringExplorer();
SplashScreen.UpdateText(Key.SplashScreen_InitializeProcessMonitoring);
// TODO
@ -41,6 +46,11 @@ namespace SafeExamBrowser.Core.Behaviour.Operations
SplashScreen.UpdateText(Key.SplashScreen_StopProcessMonitoring);
// TODO
SplashScreen.UpdateText(Key.SplashScreen_WaitExplorerStartup, true);
processMonitor.StopMonitoringExplorer();
processMonitor.StartExplorerShell();
}
}
}

18
SafeExamBrowser.Core/Behaviour/Operations/WorkingAreaOperation.cs
View file

@ -10,7 +10,6 @@ using SafeExamBrowser.Contracts.Behaviour;
using SafeExamBrowser.Contracts.Configuration;
using SafeExamBrowser.Contracts.I18n;
using SafeExamBrowser.Contracts.Logging;
using SafeExamBrowser.Contracts.Monitoring;
using SafeExamBrowser.Contracts.UserInterface;
namespace SafeExamBrowser.Core.Behaviour.Operations
@ -18,16 +17,14 @@ namespace SafeExamBrowser.Core.Behaviour.Operations
public class WorkingAreaOperation : IOperation
{
private ILogger logger;
private IProcessMonitor processMonitor;
private ITaskbar taskbar;
private IWorkingArea workingArea;
public ISplashScreen SplashScreen { private get; set; }
public WorkingAreaOperation(ILogger logger, IProcessMonitor processMonitor, ITaskbar taskbar, IWorkingArea workingArea)
public WorkingAreaOperation(ILogger logger, ITaskbar taskbar, IWorkingArea workingArea)
{
this.logger = logger;
this.processMonitor = processMonitor;
this.taskbar = taskbar;
this.workingArea = workingArea;
}
@ -35,16 +32,11 @@ namespace SafeExamBrowser.Core.Behaviour.Operations
public void Perform()
{
logger.Info("--- Initializing working area ---");
SplashScreen.UpdateText(Key.SplashScreen_WaitExplorerTermination, true);
processMonitor.CloseExplorerShell();
processMonitor.StartMonitoringExplorer();
SplashScreen.UpdateText(Key.SplashScreen_InitializeWorkingArea);
// TODO
// - Minimizing all open windows
// - Emptying clipboard
SplashScreen.UpdateText(Key.SplashScreen_InitializeWorkingArea);
workingArea.InitializeFor(taskbar);
}
@ -54,15 +46,9 @@ namespace SafeExamBrowser.Core.Behaviour.Operations
SplashScreen.UpdateText(Key.SplashScreen_RestoreWorkingArea);
// TODO
// - Restore all windows?
// - Emptying clipboard
workingArea.Reset();
SplashScreen.UpdateText(Key.SplashScreen_WaitExplorerStartup, true);
processMonitor.StopMonitoringExplorer();
processMonitor.StartExplorerShell();
}
}
}

2
SafeExamBrowser.Monitoring/SafeExamBrowser.Monitoring.csproj
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@ -42,6 +42,7 @@
<ItemGroup>
<Compile Include="Processes\ProcessMonitor.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="Windows\WindowMonitor.cs" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\SafeExamBrowser.Contracts\SafeExamBrowser.Contracts.csproj">
@ -56,7 +57,6 @@
<ItemGroup>
<Folder Include="Keyboard\" />
<Folder Include="Mouse\" />
<Folder Include="Windows\" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>

50
SafeExamBrowser.Monitoring/Windows/WindowMonitor.cs Normal file
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@ -0,0 +1,50 @@
/*
* Copyright (c) 2017 ETH Zürich, Educational Development and Technology (LET)
*
* 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;
using SafeExamBrowser.Contracts.Logging;
using SafeExamBrowser.Contracts.Monitoring;
using SafeExamBrowser.WindowsApi;
namespace SafeExamBrowser.Monitoring.Windows
{
public class WindowMonitor : IWindowMonitor
{
private ILogger logger;
public WindowMonitor(ILogger logger)
{
this.logger = logger;
// TODO: Make operation for window monitor OR operation for all desktop initialization?!
// ...
}
public void HideAllWindows()
{
logger.Info("Minimizing all open windows...");
User32.MinimizeAllOpenWindows();
logger.Info("Open windows successfully minimized.");
}
public void RestoreHiddenWindows()
{
throw new NotImplementedException();
}
public void StartMonitoringWindows()
{
throw new NotImplementedException();
}
public void StopMonitoringWindows()
{
throw new NotImplementedException();
}
}
}

16
SafeExamBrowser.WindowsApi/Constants/Constant.cs Normal file
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@ -0,0 +1,16 @@
/*
* Copyright (c) 2017 ETH Zürich, Educational Development and Technology (LET)
*
* 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/.
*/
namespace SafeExamBrowser.WindowsApi.Constants
{
static class Constant
{
internal const int WM_COMMAND = 0x111;
internal const int MIN_ALL = 419;
}
}

1
SafeExamBrowser.WindowsApi/SafeExamBrowser.WindowsApi.csproj
View file

@ -40,6 +40,7 @@
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="Constants\Constant.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="Constants\SPI.cs" />
<Compile Include="Constants\SPIF.cs" />

19
SafeExamBrowser.WindowsApi/User32.cs
View file

@ -35,7 +35,7 @@ namespace SafeExamBrowser.WindowsApi
/// <returns></returns>
public static uint GetShellProcessId()
{
var handle = FindWindow("Shell_TrayWnd", null);
var handle = GetShellWindowHandle();
var threadId = GetWindowThreadProcessId(handle, out uint processId);
return processId;
@ -60,6 +60,16 @@ namespace SafeExamBrowser.WindowsApi
return workingArea;
}
/// <summary>
/// Minimizes all open windows.
/// </summary>
public static void MinimizeAllOpenWindows()
{
var handle = GetShellWindowHandle();
SendMessage(handle, Constant.WM_COMMAND, (IntPtr) Constant.MIN_ALL, IntPtr.Zero);
}
/// <summary>
/// Instructs the main Windows explorer process to shut down.
/// </summary>
@ -72,8 +82,8 @@ namespace SafeExamBrowser.WindowsApi
/// </remarks>
public static void PostCloseMessageToShell()
{
var taskbarHandle = FindWindow("Shell_TrayWnd", null);
var success = PostMessage(taskbarHandle, 0x5B4, IntPtr.Zero, IntPtr.Zero);
var handle = GetShellWindowHandle();
var success = PostMessage(handle, 0x5B4, IntPtr.Zero, IntPtr.Zero);
if (!success)
{
@ -107,6 +117,9 @@ namespace SafeExamBrowser.WindowsApi
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool PostMessage(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", EntryPoint = "SendMessage")]
private static extern IntPtr SendMessage(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool SystemParametersInfo(SPI uiAction, uint uiParam, ref RECT pvParam, SPIF fWinIni);

5
SafeExamBrowser/CompositionRoot.cs
View file

@ -20,6 +20,7 @@ using SafeExamBrowser.Core.Behaviour.Operations;
using SafeExamBrowser.Core.I18n;
using SafeExamBrowser.Core.Logging;
using SafeExamBrowser.Monitoring.Processes;
using SafeExamBrowser.Monitoring.Windows;
using SafeExamBrowser.UserInterface;
namespace SafeExamBrowser
@ -36,6 +37,7 @@ namespace SafeExamBrowser
private IText text;
private ITextResource textResource;
private IUiElementFactory uiFactory;
private IWindowMonitor windowMonitor;
private IWorkingArea workingArea;
public IShutdownController ShutdownController { get; private set; }
@ -59,13 +61,14 @@ namespace SafeExamBrowser
text = new Text(textResource);
aboutInfo = new AboutNotificationInfo(text);
processMonitor = new ProcessMonitor(new ModuleLogger(logger, typeof(ProcessMonitor)));
windowMonitor = new WindowMonitor(new ModuleLogger(logger, typeof(WindowMonitor)));
workingArea = new WorkingArea(new ModuleLogger(logger, typeof(WorkingArea)));
ShutdownController = new ShutdownController(logger, messageBox, processMonitor, settings, text, uiFactory, workingArea);
StartupController = new StartupController(browserController, browserInfo, logger, messageBox, aboutInfo, processMonitor, settings, Taskbar, text, uiFactory, workingArea);
StartupOperations = new Queue<IOperation>();
StartupOperations.Enqueue(new ProcessMonitoringOperation(logger, processMonitor));
StartupOperations.Enqueue(new WorkingAreaOperation(logger, processMonitor, Taskbar, workingArea));
StartupOperations.Enqueue(new WorkingAreaOperation(logger, Taskbar, workingArea));
StartupOperations.Enqueue(new TaskbarInitializationOperation(logger, aboutInfo, Taskbar, uiFactory));
StartupOperations.Enqueue(new BrowserInitializationOperation(browserController, browserInfo, logger, Taskbar, uiFactory));
}