Add KrcDetector for .krc file support

QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/FormatDetector.cs

@@ -31,6 +31,7 @@ public class FormatDetector
         new MakefileDetector(),
         new HostsDetector(),
         new DockerfileDetector(),
+        new KrcDetector(),
     ];
 
     public static IFormatDetector Confuse(string path, string text)
@@ -50,6 +51,26 @@ public class FormatDetector
             .Where(detector => detector is not IConfusedFormatDetector && detector.Detect(path, text))
             .FirstOrDefault();
     }
+
+    public static bool Transfer(string path, out string text)
+    {
+        ITransferFormatDetector detector = Instance.TextDetectors
+            .Where(detector => detector is ITransferFormatDetector)
+            .Select(detector => detector as ITransferFormatDetector)
+            .FirstOrDefault();
+
+        text = null;
+        if (detector is null)
+        {
+            return false;
+        }
+        if (detector.Detect(path, null))
+        {
+            text = detector.Transfer(path);
+            return true;
+        }
+        return false;
+    }
 }
 
 public interface IFormatDetector
@@ -62,3 +83,8 @@ public interface IFormatDetector
 }
 
 public interface IConfusedFormatDetector : IFormatDetector;
+
+public interface ITransferFormatDetector : IFormatDetector
+{
+    public string Transfer(string path);
+}

QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/KrcDetector.cs

@@ -0,0 +1,41 @@
+// 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 KRCLib;
+using System;
+using System.IO;
+
+namespace QuickLook.Plugin.TextViewer.Detectors;
+
+public sealed class KrcDetector : ITransferFormatDetector
+{
+    public string Name => "INI";
+
+    public string Extension => ".ini"; // .krc is more like .ini than .lrc
+
+    public bool Detect(string path, string text)
+    {
+        _ = text;
+        return Path.GetExtension(path).Equals(".krc", StringComparison.OrdinalIgnoreCase);
+    }
+
+    public string Transfer(string path)
+    {
+        KRCLyrics krc = KRCLyrics.LoadFromFile(path);
+        return krc.SaveToString();
+    }
+}