gui-cs.Terminal.Gui/Terminal.Gui/App/MainLoopSyncContext.cs

namespace Terminal.Gui.App;

/// <summary>
///     provides the sync context set while executing code in Terminal.Gui, to let
///     users use async/await on their code
/// </summary>
internal sealed class MainLoopSyncContext : SynchronizationContext
{
    public override SynchronizationContext CreateCopy () { return new MainLoopSyncContext (); }

    public override void Post (SendOrPostCallback d, object state)
    {
        // Queue the task
        Application.MainLoop?.TimedEvents.Add (TimeSpan.Zero,
                                                      () =>
                                                      {
                                                          d (state);

                                                          return false;
                                                      }
                                                     );
        Application.MainLoop?.Wakeup ();
    }

    //_mainLoop.Driver.Wakeup ();
    public override void Send (SendOrPostCallback d, object state)
    {
        if (Thread.CurrentThread.ManagedThreadId == Application.MainThreadId)
        {
            d (state);
        }
        else
        {
            var wasExecuted = false;

            Application.Invoke (
                                () =>
                                {
                                    d (state);
                                    wasExecuted = true;
                                }
                               );

            while (!wasExecuted)
            {
                Thread.Sleep (15);
            }
        }
    }
}