80 lines
2.7 KiB
C#
80 lines
2.7 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 CefSharp;
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using SafeExamBrowser.Browser.Content;
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using SafeExamBrowser.Configuration.Contracts;
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using SafeExamBrowser.Configuration.Contracts.Cryptography;
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using SafeExamBrowser.I18n.Contracts;
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using BrowserSettings = SafeExamBrowser.Settings.Browser.BrowserSettings;
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namespace SafeExamBrowser.Browser.Handlers
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{
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internal class RenderProcessMessageHandler : IRenderProcessMessageHandler
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{
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private readonly AppConfig appConfig;
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private readonly Clipboard clipboard;
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private readonly ContentLoader contentLoader;
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private readonly IKeyGenerator keyGenerator;
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private readonly BrowserSettings settings;
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private readonly IText text;
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internal RenderProcessMessageHandler(AppConfig appConfig, Clipboard clipboard, IKeyGenerator keyGenerator, BrowserSettings settings, IText text)
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{
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this.appConfig = appConfig;
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this.clipboard = clipboard;
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this.contentLoader = new ContentLoader(text);
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this.keyGenerator = keyGenerator;
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this.settings = settings;
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this.text = text;
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}
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public void OnContextCreated(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame)
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{
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var browserExamKey = keyGenerator.CalculateBrowserExamKeyHash(settings.ConfigurationKey, settings.BrowserExamKeySalt, frame.Url);
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var configurationKey = keyGenerator.CalculateConfigurationKeyHash(settings.ConfigurationKey, frame.Url);
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var api = contentLoader.LoadApi(browserExamKey, configurationKey, appConfig.ProgramBuildVersion);
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var clipboardScript = contentLoader.LoadClipboard();
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var pageZoomScript = contentLoader.LoadPageZoom();
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frame.ExecuteJavaScriptAsync(api);
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if (!settings.AllowPageZoom)
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{
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frame.ExecuteJavaScriptAsync(pageZoomScript);
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}
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if (!settings.AllowPrint)
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{
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frame.ExecuteJavaScriptAsync($"window.print = function() {{ alert('{text.Get(TextKey.Browser_PrintNotAllowed)}') }}");
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}
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if (settings.UseIsolatedClipboard)
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{
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frame.ExecuteJavaScriptAsync(clipboardScript);
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if (clipboard.Content != default)
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{
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frame.ExecuteJavaScriptAsync($"SafeExamBrowser.clipboard.update('', '{clipboard.Content}');");
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}
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}
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}
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public void OnContextReleased(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame)
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{
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}
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public void OnFocusedNodeChanged(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IDomNode node)
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{
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}
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public void OnUncaughtException(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, JavascriptException exception)
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{
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}
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}
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}
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