Restore SEBPatch

SafeExamBrowser.Browser/Wrapper/Handlers/KeyboardHandlerSwitch.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 CefSharp;
+using CefSharp.WinForms;
+using CefSharp.WinForms.Host;
+using SafeExamBrowser.Browser.Wrapper.Events;
+
+namespace SafeExamBrowser.Browser.Wrapper.Handlers
+{
+	internal class KeyboardHandlerSwitch : IKeyboardHandler
+	{
+		public bool OnKeyEvent(IWebBrowser webBrowser, IBrowser browser, KeyType type, int windowsKeyCode, int nativeKeyCode, CefEventFlags modifiers, bool isSystemKey)
+		{
+			if (browser.IsPopup)
+			{
+				var control = ChromiumHostControl.FromBrowser(browser) as CefSharpPopupControl;
+
+				control?.OnKeyEvent(webBrowser, browser, type, windowsKeyCode, nativeKeyCode, modifiers, isSystemKey);
+			}
+			else
+			{
+				var control = ChromiumWebBrowser.FromBrowser(browser) as CefSharpBrowserControl;
+
+				control?.OnKeyEvent(webBrowser, browser, type, windowsKeyCode, nativeKeyCode, modifiers, isSystemKey);
+			}
+
+			return false;
+		}
+
+		public bool OnPreKeyEvent(IWebBrowser webBrowser, IBrowser browser, KeyType type, int windowsKeyCode, int nativeKeyCode, CefEventFlags modifiers, bool isSystemKey, ref bool isKeyboardShortcut)
+		{
+			var args = new GenericEventArgs { Value = false };
+
+			if (browser.IsPopup)
+			{
+				var control = ChromiumHostControl.FromBrowser(browser) as CefSharpPopupControl;
+
+				control?.OnPreKeyEvent(webBrowser, browser, type, windowsKeyCode, nativeKeyCode, modifiers, isSystemKey, ref isKeyboardShortcut, args);
+			}
+			else
+			{
+				var control = ChromiumWebBrowser.FromBrowser(browser) as CefSharpBrowserControl;
+
+				control?.OnPreKeyEvent(webBrowser, browser, type, windowsKeyCode, nativeKeyCode, modifiers, isSystemKey, ref isKeyboardShortcut, args);
+			}
+
+			return args.Value;
+		}
+	}
+}