Add built-in HelixViewer for 3d models

QuickLook.Plugin/QuickLook.Plugin.HelixViewer/Plugin.cs

@@ -0,0 +1,67 @@
+// 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.Plugin;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Windows;
+
+namespace QuickLook.Plugin.HelixViewer;
+
+public class Plugin : IViewer
+{
+    private static readonly HashSet<string> WellKnownImageExtensions = new(
+    [
+        ".stl", ".obj", ".3ds", ".lwo", ".ply",
+    ]);
+
+    private HelixPanel _hp;
+
+    public int Priority => 0;
+
+    public void Init()
+    {
+    }
+
+    public bool CanHandle(string path)
+    {
+        return !Directory.Exists(path)
+            && WellKnownImageExtensions.Contains(Path.GetExtension(path.ToLower()))
+            && Handler.CanHandle(path);
+    }
+
+    public void Prepare(string path, ContextObject context)
+    {
+        context.PreferredSize = new Size { Width = 800, Height = 800 };
+    }
+
+    public void View(string path, ContextObject context)
+    {
+        _hp = new HelixPanel(path);
+        context.ViewerContent = _hp;
+        context.Title = $"{Path.GetFileName(path)}";
+        context.IsBusy = false;
+    }
+
+    public void Cleanup()
+    {
+        GC.SuppressFinalize(this);
+
+        _hp = null;
+    }
+}