photomator/Photomator/Program.cs

using System.Reflection;
using Photomator.Views;

namespace Photomator;

public partial class Program {
    public delegate void OpenCallback(nint application, nint[] files, int n_files, nint hint, nint data);

    private readonly Adw.Application _application;

    public static int Main() => new Program().Run();

    public Program() {
        _application = Adw.Application.New("de.cantorgymnasium.Photomator", Gio.ApplicationFlags.FlagsNone);
        Gtk.Window.SetDefaultIconName("de.cantorgymnasium.Photomator");
        string localPath = Path.GetFullPath(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)!) + "/de.cantorgymnasium.Photomator.gresource";
        if (File.Exists(localPath))
            Gio.Functions.ResourcesRegister(Gio.Functions.ResourceLoad(localPath));
        else {
            var prefixes = new List<string> {
               Directory.GetParent(Directory.GetParent(Path.GetFullPath(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)!))!.FullName)!.FullName,
               Directory.GetParent(Path.GetFullPath(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)!))!.FullName,
               "/usr"
            };
            string? prefix = prefixes.Find(prefix => File.Exists(prefix + "/share/de.cantorgymnasium.Photomator/de.cantorgymnasium.Photomator.gresource"));
            if (prefix != null)
                Gio.Functions.ResourcesRegister(Gio.Functions.ResourceLoad(Path.GetFullPath(prefix + "/share/de.cantorgymnasium.Photomator/de.cantorgymnasium.Photomator.gresource")));
        }
        _application.OnActivate += (_, _) => new MainWindow(_application).Start();
    }

    public int Run() => _application.RunWithSynchronizationContext(null);
}