61 lines
1.6 KiB
C#
61 lines
1.6 KiB
C#
/*
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* Copyright (c) 2024 ETH Zürich, IT Services
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using SafeExamBrowser.Logging.Contracts;
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using SafeExamBrowser.Monitoring.Contracts.Mouse;
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using SafeExamBrowser.Settings.Monitoring;
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using SafeExamBrowser.WindowsApi.Contracts;
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using SafeExamBrowser.WindowsApi.Contracts.Events;
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namespace SafeExamBrowser.Monitoring.Mouse
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{
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public class MouseInterceptor : IMouseInterceptor
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{
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private Guid? hookId;
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private ILogger logger;
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private INativeMethods nativeMethods;
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private MouseSettings settings;
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public MouseInterceptor(ILogger logger, INativeMethods nativeMethods, MouseSettings settings)
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{
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this.logger = logger;
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this.nativeMethods = nativeMethods;
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this.settings = settings;
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}
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public void Start()
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{
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hookId = nativeMethods.RegisterMouseHook(MouseHookCallback);
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}
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public void Stop()
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{
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if (hookId.HasValue)
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{
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nativeMethods.DeregisterMouseHook(hookId.Value);
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}
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}
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private bool MouseHookCallback(MouseButton button, MouseButtonState state, MouseInformation info)
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{
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var block = false;
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block |= button == MouseButton.Auxiliary;
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block |= button == MouseButton.Middle && !settings.AllowMiddleButton;
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block |= button == MouseButton.Right && !settings.AllowRightButton;
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if (block)
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{
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logger.Info($"Blocked {button.ToString().ToLower()} mouse button when {state.ToString().ToLower()}.");
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}
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return block;
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}
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}
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}
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