Refactor thumbnail handlers into provider classes

QuickLook.Plugin/QuickLook.Plugin.ThumbnailViewer/Providors/FigProvidor.cs

@@ -0,0 +1,56 @@
+// 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 PureSharpCompress.Archives.Zip;
+using PureSharpCompress.Common;
+using PureSharpCompress.Readers;
+using QuickLook.Common.Helpers;
+using System;
+using System.Diagnostics;
+using System.IO;
+
+namespace QuickLook.Plugin.ThumbnailViewer.Providors;
+
+internal class FigProvidor : AbstractProvidor
+{
+    public override Stream ViewImage(string path)
+    {
+        try
+        {
+            using ZipArchive archive = ZipArchive.Open(path, new());
+            using IReader reader = archive.ExtractAllEntries();
+
+            while (reader.MoveToNextEntry())
+            {
+                if (reader.Entry.Key!.Equals("thumbnail.png", StringComparison.OrdinalIgnoreCase))
+                {
+                    MemoryStream ms = new();
+                    using EntryStream stream = reader.OpenEntryStream();
+                    stream.CopyTo(ms);
+                    return ms;
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            Debug.WriteLine($"Error reading thumbnail from {path}: {ex.Message}");
+            ProcessHelper.WriteLog(ex.ToString());
+        }
+
+        return null;
+    }
+}