Use format detector feature for TextViewer

QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/XMLDetector.cs

@@ -0,0 +1,34 @@
+// 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 System.Text.RegularExpressions;
+
+namespace QuickLook.Plugin.TextViewer.Detectors;
+
+public class XMLDetector : IFormatDetector
+{
+    internal Regex Signature { get; } = new(@"<\?xml\b[^>]*\bversion\s*=\s*""[^""]*""[^\?>]*\?>", RegexOptions.IgnoreCase);
+
+    public string Name => "XML";
+
+    public string Extension => ".xml";
+
+    public bool Detect(string text)
+    {
+        return Signature.IsMatch(text);
+    }
+}