QuickLook/QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/ChardetReaderOptions.cs

// 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 SharpCompress.Common;
using SharpCompress.Readers;
using System;
using System.Text;
using UtfUnknown;

namespace QuickLook.Plugin.ArchiveViewer;

internal class ChardetReaderOptions : ReaderOptions
{
    public ChardetReaderOptions()
    {
        ArchiveEncoding = new ArchiveEncoding
        {
            CustomDecoder = Chardet
        };
    }

    public string Chardet(byte[] bytes, int index, int count)
    {
        var buffer = new byte[count];

        Array.Copy(bytes, index, buffer, 0, count);

        var encoding = CharsetDetector.DetectFromBytes(buffer).Detected?.Encoding ?? Encoding.Default;

        return encoding.GetString(buffer);
    }
}