add single instance (daemon) mode

[tuananh]

gtk is rather slow to start so i think it's a good idea to add single instance mode (daemon)

[Lamby777]

Good idea, I was getting pretty annoyed with this as well. Is this something that would need to be a separate program, or could it somehow launch a daemon detached from the current process when it first runs? I have no idea where to even begin learning with this topic.

Probably a priority issue, though, as nobody like waiting 4 seconds just for a smile emoji or whatever.

[tuananh]

i have no idea as well since rust & gtk is new to me.

I implemented it in my fork by hiding the app when press escape & stop propagation (do nothing else) and show it again when it's launched

fn build_window(app: &Application) {
    if let Some(window) = app.active_window() {
        window.present(); // Bring the existing window to the foreground
        return;
    }

Now it's like this

windot.mp4