QuickLook/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/Webview/Lottie/LottieMetaProvider.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 System.Collections.Generic;
using System.IO;
using System.Windows;

namespace QuickLook.Plugin.ImageViewer.Webview.Lottie;

public class LottieMetaProvider(string path) : IWebMetaProvider
{
    private readonly string _path = path;
    private Size _size = Size.Empty;

    public Size GetSize()
    {
        if (_size != Size.Empty)
        {
            return _size;
        }

        if (!File.Exists(_path))
        {
            return _size;
        }

        try
        {
            var jsonString = LottieExtractor.GetJsonContent(_path);
            var jsonLottie = LottieParser.Parse<Dictionary<string, object>>(jsonString);

            if (jsonLottie.ContainsKey("w")
             && jsonLottie.ContainsKey("h")
             && double.TryParse(jsonLottie["w"].ToString(), out double width)
             && double.TryParse(jsonLottie["h"].ToString(), out double height))
            {
                return _size = new Size(width, height);
            }
        }
        catch
        {
            // That's fine, just return the default size.
        }

        return new Size(800, 600);
    }
}