Add IMoreMenu support to HtmlViewer with View Source Code option

Co-Authored-By: emako <24737061+emako@users.noreply.github.com>

QuickLook.Plugin/QuickLook.Plugin.HtmlViewer/Plugin.MoreMenu.cs

@@ -0,0 +1,54 @@
+// Copyright © 2017-2025 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using QuickLook.Common.Commands;
+using QuickLook.Common.Helpers;
+using QuickLook.Common.Plugin.MoreMenu;
+using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
+using System.Windows.Input;
+
+namespace QuickLook.Plugin.HtmlViewer;
+
+public partial class Plugin
+{
+    public ICommand ViewSourceCodeCommand { get; }
+
+    public Plugin()
+    {
+        ViewSourceCodeCommand = new RelayCommand(ViewSourceCode);
+    }
+
+    public IEnumerable<IMenuItem> GetMenuItems()
+    {
+        string translationFile = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "Translations.config");
+
+        yield return new MoreMenuItem()
+        {
+            Icon = "\uE943",
+            Header = TranslationHelper.Get("MW_ViewSourceCode", translationFile),
+            MenuItems = null,
+            Command = ViewSourceCodeCommand,
+        };
+    }
+
+    public void ViewSourceCode()
+    {
+        PluginHelper.InvokePluginPreview("QuickLook.Plugin.TextViewer", _currentPath);
+    }
+}